LIQUID SEAL METHOD FOR ON-OFF OF GAS PIPELINE AND DEVICE THEREOF

Abstract

The present application discloses a liquid seal method for on-off of gas pipeline and a device thereof, wherein a liquid-sealed U-shaped container being provided in the gas pipeline that requires to perform on-off control; a lifting mechanism using a leading screw controls the slider having a certain volume to immerse in or leave the liquid so as to raise or lower the liquid level. The U-shaped container has a structure with a wide top and a narrow bottom, the space of the U-shaped container is divided into two spaces with different sizes by a separating plate, and a liftable liquid-occupying device is located at the space having a larger volume; the upper and lower parts of the slider are tapered; and the driving device can be motor or hand wheel.

Claims

1. A liquid seal method for on-off of gas pipeline, wherein a liquid-sealed U-shaped container being provided in the gas pipeline that requires to perform on-off control; the U-shaped container comprises a separating plate arranged at the upper part, and the separating plate has a certain distance from the bottom of the container; when it is necessary to block the gas pipeline, an object is controlled to immerse into the liquid in the U-shaped container until the liquid level rises above the bottom of the separating plate, so that the gas pipeline on both sides of the U-shaped container are blocked; when it is necessary to unblock the gas pipeline, the object is controlled to leave from the liquid in the U-shaped container until the liquid level is lowered below the bottom of the separating plate, so that the gas pipeline on both sides of the U-shaped container are connected through.

2. The liquid seal method according to claim 1, wherein the object is selected from the following two modes, one is composed of a plurality of liquid-occupying components connected by flexible connections, each of the component occupies a certain volume, and the specific gravity of the component is greater than that of the liquid in the U-shaped container; the other is an integral object, which is a single object occupying a certain volume, and the specific gravity of the object is greater than that of the liquid in the U-shaped container.

3. A liquid seal device for on-off of gas pipeline, comprising an air inlet pipe, an air outlet pipe, two pipe joints, a U-shaped container, a separating plate and a liftable liquid-occupying device; wherein, the air inlet pipe and the air outlet pipe are connected to the sides of the U-shaped container via the pipe joints, respectively; the separating plate divides the U-shaped container into two spaces with different sizes, the upper end of the separating plate is attached to the U-shaped container, the bottom of the separating plate has a certain distance from the bottom of the container; the liftable liquid-occupying device is provided in the space having a large space in the U-shaped container, including a leading screw, a positioning rod, a slider, a bearing seat and a driving device; the leading screw penetrates the slider and is capable of rotating to control the lifting of the slide; a positioning rod is parallel to the leading screw and penetrates one side of the slider, so that the slide can keep balance when lifting; the driving device, used for providing rotating power of the leading screw, is connected to the leading screw and is located at the top thereof.

4. The liquid seal device according to claim 3, wherein the U-shaped container has a structure with a wide top and a narrow bottom, and the side wall where the liftable liquid-occupying device is located is wedge-shaped, the space with the wedge-shaped side wall has a larger volume; the entire side walls or partial side walls of the U-shaped container is made of transparent material, which is convenient for observing the liquid level or the internal situation of the container.

5. The liquid seal device according to claim 3, wherein the liquid in the U-shaped container is odorless, non-toxic, and non-volatile, so that the liquid volume is relatively fixed.

6. The liquid seal device according to claim 3, wherein the slider moves vertically along the leading screw and the positioning rod, and its upper and lower parts are tapered; the slider is a hollow structure, and the leading screw and positioning rod do not pass through the hollow cavity.

7. The liquid seal device according to claim 3, wherein the driving device is connected to the top of the leading screw, and the driving device is selected from the following modes, one is driven by a motor to provide power to rotate the leading screw, the motor is located inside or outside the U-shaped container, and the motor is connected to the top of the leading screw and placed on a support; the other is hand wheel drive, the operator turns the hand wheel to provide power for the leading screw to rotate; the hand wheel is connected to the top of the leading screw on the outside of the U-shaped container.

8. The liquid seal device according to claim 7, wherein the control of the rotation of the leading screw by the motor can be linked with the on or off of a fan in the air pipeline; when the fan is switched on, the motor controls the leading screw to rotate so as to raise the slider, and stops rotating when the slide rises to the highest position; when the fan is switched off, the motor controls the leading screw to rotate in reverse direction to lower the slider, and stops rotating after the slide is completely immersed in the liquid and thus blocks pipeline flow, i.e., a stable liquid seal is formed.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG. 1a is a schematic diagram of the whole device; and FIG. 1b is a schematic diagram of the side view of the device;

[0021] FIG. 2 is a schematic diagram of a blocked state of the liquid seal device according to the present invention, in which the slider is immersed in the liquid;

[0022] FIG. 3a shows a schematic diagram of the liftable liquid-occupying device located at the side of the air inlet pipe; and FIG. 3b shows a schematic diagram of the liftable liquid-occupying device located at the side of the air outlet pipe;

[0023] FIG. 4 is a schematic diagram of the liquid seal device according to the present invention with a hand wheel as a driving device.

[0024] In which:

TABLE-US-00001 1: air inlet pipe 2: pipe joint 3: U-shaped container 4: separating plate 5: leading screw 6: positioning rod 7: slide 8: bearing seat 9: motor 10: support 11: air outlet pipe 12: hand wheel

DETAILED DESCRIPTION OF THE PRESENT INVENTION

[0025] The present invention will be further described below in detail in combination with the specific embodiments and drawings. The described specific embodiments are only used for describing the present invention, are not intended to limit the present invention.

[0026] FIG. 1 shows the liquid seal device for on-off of gas pipeline according to the present invention, which power mechanism is motor and the motor is provided outside the U-shaped container. The liquid seal device comprises an air inlet pipe 1, two pipe joints 2, a U-shaped container 3, a separating plate 4, a leading screw 5, a positioning rod 6, a slider 7, a bearing seat 8, a motor 9, a support 10 and an air outlet pipe 11. Wherein, the separating plate 4 divided the U-shaped container 3 into two spaces with different sizes, and the leading screw 5 and the positioning rod 6 vertically penetrated the space of the U-shaped container 3 where the air inlet pipe located. The motor 9, which is arranged on the support 10, controlled the leading screw 5 to rotate, thereby driving the slider 7 to move up and down, and the positioning rod 6 penetrated one side of the slider 7 to maintain its balance during movement.

[0027] FIG. 2 is a schematic diagram of a blocked state of the liquid seal device according to the present invention, in which the slider is immersed in the liquid. When the gas pipeline needs to be kept blocked, the slide 7 kept at a lower position in the U-shaped container 3, that is, the slider 7 was completely immersed in the liquid. Since the slider 7 was occupied a certain volume, the liquid level of the U-shaped container 3 was maintained at a height higher than the bottom of the separating plate 4 to form a liquid seal so as to isolate the gas between the air inlet pipe and air outlet pipe.

[0028] FIG. 3 is a schematic diagram of a connecting-through state of the liquid seal device according to the present invention; in which, FIG. 3(a) shows the liftable liquid-occupying device is located at the side of the air inlet pipe; FIG. 3 (b) shows the liftable liquid-occupying device is located at the side of the air outlet pipe. When the gas pipeline needs to be connected through, the fan was switched on, the motor 9 linked with the fan controlled the leading screw 5 to rotate so as to raise the slider 7, and was stopped rotating when the slide 7 rose to the highest position of the U-shaped container 3. Due to the slider 7 no longer occupies the volume in the liquid when it left from the liquid, the liquid level of the liquid drops below the bottom of the separating plate 4, so that the air inlet side and air outlet side of the U-shaped container 3 are connected through.

[0029] FIG. 4 is a schematic diagram of the liquid seal device according to the present invention with a hand wheel as a driving device. The motor 9 and its support 10 were replaced with the hand wheel 12. The operator can turn the hand wheel 12 to provide power for the leading screw 5 to rotate so as to move the slider 7 vertically, thus achieve the blocking or connection of the gas pipeline.

[0030] Although the application has been described above, the application is not limited to the above specific embodiments, which are only illustrative rather than restrictive. Those skilled in the art may make many variations without departing from the purpose of the application under the inspiration of the application, which are all within the scope of protection of the application.