Pneumatic air booster

Abstract

A pneumatic air booster (100) includes; a shaft (160); a body (110, 111) including a first body (110) and a second body (111); an air inlet (112); an air outlet (113); a pressure chamber (114) communicating the air inlet (112); an air control passage (115) communicating the pressure chamber (114); a pressure control chamber (116); a bonnet (190); a valve (140); a valve spring (150); a valve seat (170); and a connection passage (102a) extended between the air outlet (113) and the pressure control chamber (116).

Claims

1. A pneumatic air booster (100) which comprises; a shaft (160) extending in a axis direction, a body (110, 111) surrounding the shaft (160) and including a first body (110) and a second body (111), wherein the second body (111) is coupled to the first body (110) and provided at a higher level than the first body (110) when measured along the axis direction, an air inlet (112) extending from a first sidewall surface of the body (110, 111) to between the first body and the second body (110, 111) in a first radius direction, wherein the first radius direction is perpendicular to the axis direction, an air outlet (113) extending from a second sidewall surface of the body (110, 111) to between the first body and the second body (110, 111) in a second radius direction, wherein the second radius direction is perpendicular to the axis direction, a pressure chamber (114) (i) formed between the first body (110) and the shaft (160) and (ii) communicating the air inlet (112), an air control passage (115) (i) formed between a lower part of the second body (111) and the shaft (160) and (ii) communicating the pressure chamber (114), a pressure control chamber (116) (i) provided over the shaft (160) and over the second body (111) and (ii) vertically aligned with the shaft (160) in the axis direction, a bonnet (190) that is coupled to an upper part of the second body (111) and surrounding the pressure control chamber (116), a lower cover (120) that surrounds the pressure chamber (114), a valve (140) that (i) is installed between the pressure chamber (114) and the shaft (160) and (ii) opens and closes the air control passage (115) to and from the pressure chamber (114), and a valve spring (150) that (i) is vertically aligned under the shaft (160) in the axis direction, (ii) is surrounded by the pressure chamber (114), and (iii) presses the valve (140) upward and downwards in the axis direction, wherein a lower end of the shaft (160) is coupled to the valve (140) and lifts and lowers the valve (140) in the axis direction to open and close the air control passage (115) to and from the pressure chamber (114), wherein a valve seat (170) is provided between the pressure control chamber (116) and supported on and an upper end of the shaft (160) in a manner of being lifted and lowered, wherein the valve seat (170) is open or closed depending on whether being pressed upwards or downwards in the axis direction, wherein a connection passage (102a) is extended between the air outlet (113) and the pressure control chamber (116), wherein the air outlet (113) and the pressure control chamber (116) communicate with each other through the connection passage (102a), wherein, when air in the air outlet (113) flows into the pressure control chamber (116) through the connection passage (102a), a pressure in the pressure control chamber (116) increases, and the valve seat (170) is pushed downward.

2. The pneumatic air booster according to claim 1, further comprising: a connecting pipeline (102) (i) extending from the pressure control chamber (116) through outside of the second body (111) to the connecting pipeline (102), wherein a distance from the shaft (160) to the connecting pipeline (102) located outside of the second body (111) is farther than a distance from the shaft (160) to the second body (111) when measured along the radius direction, wherein the connection passage (102a) is formed in the connecting pipeline (102), wherein the air outlet (113) and the pressure control chamber (116) are connected to the connecting pipeline (102).

3. The pneumatic air booster according to claim 1, further comprising: a support hole (121) and a tension adjuster (124), wherein the support hole (121) (i) communicates with the pressure chamber (114), (ii) vertically aligned under the valve spring (150) in the axis direction, and (iii) extending downwards through the lower cover (120) in the axis direction, wherein the tension adjuster (124) adjusts tension of the valve spring (150) and is screwed into the support hole (121).

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a cross-sectional view illustrating a structure of a pneumatic air booster according to a first embodiment of the present invention.

(2) FIG. 2 is a configuration diagram illustrating an installation example of a pneumatic air booster according to the present invention.

(3) FIG. 3 is a cross-sectional view illustrating a structure of a pneumatic air booster according to a second embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

(4) Hereinafter, the features of the pneumatic air booster according to the present invention will be understood by embodiments described in detail with reference to the attached drawings.

(5) Since the present invention can have various changes and can have various forms, embodiments will be described in detail in the present specification. However, this is not intended to limit the present invention to a specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

(6) According to FIGS. 1 and 2, the pneumatic air booster (100) according to the present invention receives air supplied through an air line (2) from an air supply source (1) such as a blower or a compressor, controls the discharge, and supplies the air to the pipeline (3) through which objects move, of high-density transfer equipment for transferring heavy objects with high specific gravity such as sand and limestone.

(7) This pneumatic air booster (100) of the present invention comprises a first body (110) with an air inlet (112) and an air outlet (113) formed on the side of the second body (111), and a pressure chamber (114) and an air control passage (115) communicating with the air inlet (112) and the air outlet (113), which are formed in the lower part of the second body (111), a bonnet (190) that is coupled to the upper part of the first body (110) and forms a pressure control chamber (116), a lower cover (120) that closes the pressure chamber (114) of the first body (110), an upper cover (130) that closes the upper part of the bonnet (190), a valve (140) installed inside the pressure chamber (114) to open and close the air control passage (115), a valve spring (150) installed in the pressure chamber (114) to press the valve (140) upward, a shaft (160) which passes through the pressure chamber (114) and the pressure control chamber (116) and has a lower end coupled to the valve (140) to lift and lower the valve (140) to open and close the air control passage (115), a valve seat (170) provided in the pressure control chamber (116) in a manner of being lifted and lowered and supported on and upper end of the shaft (160), and an adjustment spring (180) provided in the pressure control chamber (116) to press the valve seat (170) downward.

(8) At this time, the bonnet (190) and a fixing nut (192) are coupled to the upper side of the first body (110), and a liner (194) is provided at the inner upper end of the bonnet (190) to be coupled to the upper cover (130).

(9) This present invention forms a connection passage (102a) communicating with the air outlet (113) and the pressure control chamber (116) of the first body (110), and when the pressure of the air outlet (113) increases, the present invention injects air into the pressure control chamber (116) to induce the pressure increase of the pressure control chamber (116), and presses the valve seat (170) downward to lower the shaft (160) to expand the air control passage (115). Of course, when the pressure of the pressure control chamber (116) decreases, the valve seat (170) returns upward and the air control passage (115) is reduced.

(10) Hereinafter, the present invention will be specifically described.

(11) The first body (110) has an air inlet (112) formed on one side of the second body (111), an air outlet (113) is formed on the other side of the second body (111), and a pressure chamber (114) is formed at a central lower part of the second body (111), and an air control chamber (115) is formed on the upper side of the pressure chamber (114) to communicate with each other. In this structure, the air inlet (112) is connected to the pressure chamber (114) and the air control passage (115) is connected to the air outlet (113), so that the air supplied from a blower or a compressor moves to the air outlet (113) through the air inlet (112), the pressure chamber (114), and the air control passage (115).

(12) In addition, the first body (110) is coupled to the bonnet (190) in which the pressure control chamber (116) is formed, in which the control spring (180) and the valve seat (170) are installed in the upper center of the second body (111).

(13) In this first body (110), a connection passage (102a) that communicates with the air outlet (113) and the pressure control chamber (116) is formed. At this time, one end of the connection passage (102a) communicates with the air outlet (113) and the other end communicates with the pressure control chamber (116). In this case, the inlet/outlet of the pressure control chamber (116) communicating with the connection passage (102a) is located relatively above the valve seat (170) or is formed to face upward, and when the air of the air outlet (113) flows through the connection passage (102a) and thus the internal pressure of the pressure control chamber (116) increases, the valve seat (170) may be lowered by pressing the upper part of the valve seat (170).

(14) The lower cover (120) is coupled to the lower part of the first body (110) and closes the pressure chamber (114) of the first body (110), and the bonnet (190) and the upper cover (130) are coupled to the upper pan of the first body (110) and close the pressure control chamber (116) to prevent external air from being arbitrarily flowed into the pressure chamber (114) and the pressure control chamber (116). At this time, when closing the pressure chamber (114) of the first body (110) with the lower cover (120), an O-ring (122) is fitted to maintain airtightness.

(15) A valve (140) for opening and closing the air control passage (115) is provided in this pressure chamber (114) of the first body (110) to be lifted and lowered, and a valve spring (150) is provided at the lower side of the valve (140) to press the valve (140) in the upward direction. At this time, when the valve (140) is lifted and closes the entrance of the air control passage (115), the air supplied from the air inlet (112) is blocked from moving to the air outlet (113), and when the valve (140) is lowered and opens the entrance of the air control passage (115), the air supplied from the air inlet (112) moves to the air outlet (113).

(16) And a tension adjuster (124) is provided on the lower cover (120) to adjust the tension of the valve spring (150). At this time, the tension adjuster (124) is made of a structure such as a screw, a set screw, and a bolt, etc., and passes through the central lower part of the lower cover (120) to be screw-coupled to the support hole (121) to which the tension adjuster (124) is screwed. At this time, it is preferable that a tool groove (124a) is formed at the lower end of the tension adjuster (124) or a polygonal head is formed so that the tension adjuster (124) can be easily rotated using a tool such as a screwdriver or a wrench.

(17) According to this structure, when the tension adjuster (124) is rotated in one direction or the other direction, the tension adjuster (124) is lifted and lowered and thus the pressing force pressing the lower end of the valve spring (150) can be adjusted, and accordingly, the tension of the valve spring (150) can be adjusted.

(18) On the other hand, the shaft (160) passes through the pressure chamber (114), the air control passage (115) and the pressure control chamber (116) to be installed vertically lifted and lowered, and in order to maintain airtightness, an O-ring (162) is mounted to prevent the inflow and outflow of air between the pressure chamber (114) and the pressure control chamber (116) through the guide hole (117) in the center of the first body (110).

(19) This lower part of the shaft (160) is coupled to the valve (140) located in the pressure chamber (114) and the upper end protrudes upwardly into the pressure control chamber (116), and when the shaft (160) is lifted or lowered, the valve (140) is also lifted or lowered together.

(20) And the pressure control chamber (116) is provided with a valve seat (170) that is in contact with the upper end of the shaft (160) so as to be lifted or lowered, and the upper side of the valve seat (170) is provided with an adjustment spring (180) that presses the valve seat (170) downward.

(21) In relation to this tension of the adjustment spring (180), when the upper cover (130) is rotated, the bolt (131) coupled to the upper cover (130) rotates and the pressure nut (181) on which the upper end of the adjustment spring (180) is supported moves up and down and thus the tension can be adjusted.

(22) At this time, a support groove (171) is formed at the edge of the valve sheet (170), and a packing (172) that is in close contact with the inner wall surface of the pressure control chamber (116) is inserted such that an upper space and a lower space of the pressure control chamber (116) are separated by the valve sheet (170) to block the inflow and outflow of air between the upper and lower spaces, and when the air from the air outlet (113) side of the first body (110) flows into the pressure control chamber (116) through the connection passage (102a) and the internal pressure increases, the pressure is applied to the upper part of the valve seat (170), and the valve seat (170) can be lowered. And a packing (173) is provided on a central lower surface of the valve sheet (170) to support an upper end of the shaft (160).

(23) Meanwhile, FIG. 3 is a drawing illustrating another embodiment of the present invention. According to this, the connection passage (102a) that communicates with the air outlet (113) and the pressure control chamber (116) is not formed in the first body (110), but is provided with a connecting pipeline (102) in which a separate connection passage (102a) is formed.

(24) That is, one end of the connecting pipeline (102) is connected to the air outlet (113), and the other end of the connecting pipeline (102) is connected to the pressure control chamber (116). In this structure, one end of the connecting pipeline (102) may be connected to the first body (110) and the other end may be connected to the first body (110) or the bonnet (190) as needed.

(25) Hereinafter, an operation example of the pneumatic air booster according to the present invention will be described with reference to FIGS. 1 to 3.

(26) The valve seat (170) of the pressure control chamber (116) is pushed by the adjustment spring (180) to press the upper end of the shaft (160) while the valve seat (170) is lowered, so that the valve (140) located in the pressure chamber (114) is lowered to keep the entrance of the air control passage (115) open, and the air supplied from the air inlet (112) moves from the pressure chamber (114) through the air control passage (115) to the air outlet (113), and the air is supplied to the pipeline (3) connected to the air outlet (113).

(27) On the other hand, when heavy objects with a high specific gravity such as sand or limestone in the pipeline (3) are stagnant, the pressure inside the pipeline (3) increases, and this pressure rise also affects the air outlet (113). That is, when the pressure of the air outlet (113) increases, the air flows into the pressure control chamber (116) through the connection passage (102a), and when the internal pressure increases, the pressure is applied to the upper part of the valve seat (170) and the valve seat (170) is lowered pressing the upper end of the shaft (160) more strongly, and the valve (140) located in the pressure chamber (114) is further lowered, so the entrance of the air control passage (115) is further opened, and the amount of the air is further increased which moves from the air inlet (112) to the air outlet (113) transferring the objects in the pipeline (3) and thus the pressure inside the pipeline (3) is lowered.

(28) As such, when the pressure inside the pipe line (3) is lowered, the pressure of the air outlet (113) is also lowered, and the air flowed into the pressure control chamber (116) flows back to the air outlet (113) along the connection passage (102a), and the pressure in the pressure control chamber (116) is lowered, the valve (140) is lifted by the pressing force of the valve spring (150) and thus the entrance of the air control passage (115) is reduced.

(29) With such an operating structure of the pneumatic air booster (100) of the present invention, the amount of air supplied from a blower or a compressor can be minimized, and smooth transfer of objects in the pipeline (3) is enabled, and even the impact to the pipeline is also reduced, which is advantageous in maintenance and repair of equipment.

(30) Although the embodiment of the present invention has been described in detail as described above, the scope of the present invention is not limited thereto, and the scope of the present invention extends to the scope substantially equivalent to the embodiment of the present invention.