Sleeve for a pinch-type valve

Abstract

The present utility model shows a sleeve (M′) that is designed so as to be completely closed in its normal position, which is pressed to prevent opening by means of a roller stem that stops the fluid from leaking; the present model makes it possible to avoid strain in the closing of the valve caused by overstretching which causes a shorter useful life and leaks in the seal. It also avoids excessive strain between the face of the sleeve (M) and the flange or body (C), avoiding breakages.

Claims

1. A sleeve (M′) for a pinch type valve for fluids, which helps prevent stress (T′) in a closing of the valve due to over-stretching (LD′), which causes a shorter useful life and leaks in the seal, said valve has a diameter D, and there is no tension/stress zone (LD′), since incorporated in its construction, there is a deformation that will be produced when closing the sleeve; said valve is in a normal closed position; in said closed position, the sleeve (M′) has an ellipse-shaped cross-section (E); wherein said valve is designed in a normally closed position, which is pressed by mechanical means, which has a rod with pin, to avoid an opening produced by fluid pressure.

2. The sleeve (M′) for a pinch type valve for fluids, according to claim 1, wherein in an area of said ellipse-shaped cross-section (E), elastomeric material (ME′) has been added.

3. The sleeve (M′) for a pinch type valve for fluids, according to claim 1, wherein in said sleeve (M′), there is no tension (T′) at a junction between a body (C) of a flange and the sleeve (M′).

4. The sleeve (M′) for a pinch type valve for fluids, according to claim 1, wherein in closing said ellipse-shaped cross-section (E) of the valve, a sealing occurs without a beam-like opening.

5. The sleeve (M′) for a pinch type valve for fluids, according to claim 1, wherein in a middle area of the ellipse-shaped cross-section (E) an intermediate section of the sleeve (M′) is increased by adding elastomeric material.

6. The sleeve (M′) for a pinch type valve for fluids, according to claim 5, wherein the increase in the intermediate section of the sleeve (M′) generates a decrease in fluid velocity.

7. The sleeve (M′) for a pinch type valve for fluids, according to claim 4, wherein the closing of said ellipse-shaped cross-section (E) of the valve is carried out without stress (T″) in a sealing zone (SE).

8. The sleeve (M′) for a pinch type valve for fluids, according to claim 1, wherein opening of said sleeve valve (M′) occurs by releasing pressure made by the rod with pin, and the pressure determined from an internal fluid, deforms the sleeve (M′) that is made of elastomeric material, allowing the fluid to flow.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The accompanying drawings are included to provide a greater understanding of the invention, constitute part of this description, and further illustrate some of the prior state-of-the-art and some of the preferred devices, in order to explain the principles of this invention.

(2) FIG. 1 belongs to the prior state-of-the-art and corresponds to the full-port pinch valve sleeve (M) in the open position.

(3) FIG. 2 belongs to the prior state-of-the-art and corresponds to the full-port pinch valve sleeve (M) in the closed position.

(4) FIG. 3 belongs to the prior state-of-the-art and corresponds to the stress zone (T) of the sleeve (M)/body (C) grip.

(5) FIG. 4 belongs to the prior state-of-the-art and corresponds to a cross-section of sleeve (M), deformed at closure.

(6) FIG. 5 belongs to the prior state-of-the-art and corresponds to a conventional pinch valve, manufactured in the normal open position.

(7) FIG. 6 shows the proposed new design, manufactured in the normal closed position.

(8) FIG. 7 belongs to the prior state-of-the-art and corresponds to a conventional pinch valve, top view.

(9) FIG. 8 shows the proposed new design, top view.

(10) FIG. 9 new design corresponds to the manufacture in the closed position, and therefore there is no tension (stress) in LD.

(11) FIG. 10 new design corresponds to the manufacture in the closed position, and therefore there is no tension (stress) in marked zone.

(12) FIG. 11 new design corresponds to the manufacture in the closed position, and therefore there is no beam-like opening at the ends.

(13) FIG. 12 prior state-of-the-art that corresponds to the manufacture of a conventional full-port sleeve (M), without added material, where the stress zone is shown.

(14) FIG. 13 prior state-of-the-art that corresponds to the manufacture of a conventional sleeve (M) in the hypothetical case of material addition, as can be seen, the stress zone has a greater radius, which will require greater force from the actuator for closure, and fewer possibilities of airtightness.

(15) FIG. 14 new design corresponds to the simulation of the addition of elastomeric material in the new proposed design.

(16) FIG. 15 new design corresponds to the comparison between the proposed design and the conventional design in open position, adding elastomeric material (ME′).

DETAILED DESCRIPTION OF SPECIFIC EMBODIMENTS

(17) This utility model shows a sleeve (M′), which has been conceived so that in its normal position it is completely closed, which is pressed to prevent it from opening using a rod with pin, which prevents the fluid from leaking.

(18) The points that affect the useful life of the sleeve-type valve have been eliminated since; a) Since the proposed design is manufactured in the closed position, there is no stress (T′) of the material in said position. In the comparison between FIGS. 5 and 6) and (7 and 8), the differences between the conventional model and the proposed new design can be seen.

(19) As can be seen in images 2 and 9, when compared with the drawbacks, corresponding to the tension generated in LD, this does not exist in the new design (LD′). b) Given that the proposed design is manufactured in the closed position, the drawback corresponding to tension/stress (T′) in the area where the valve is fixed has been eliminated; this can be seen in FIGS. 3 and 10. c) Since the proposed design is manufactured in the closed position, another drawback has been eliminated, which is divided into three parts: The beam-like opening (H) has been eliminated at the ends, as shown in FIGS. 4 and 11. Since the beam-like opening (H) does not exist, the problem of high velocities in these areas is eliminated, in the process of closing the valve. However, the new design is larger in the sealing area, thus considerably reducing the velocities generated and reducing abrasion damage. The proposed design, when manufactured in the normal closed position, eliminates the damage produced in the folds of the conventional sleeve (M′), at the time of closure, as can be seen in FIGS. 4 and 11. d) The fourth drawback of the conventional design is the inability to increase the material in order to increase the useful life of the sleeve (M′); this drawback does not appear in the proposed design, given there is no problem with the tension generated in the folds, since this is its normal position, i.e., without stress (T′). This considerably reduces the load required to close the valve, since the actuator, for the conventional sleeve, with the addition of material, should overcome the force of the pressure of the fluid by the area, plus the force required to overcome elastomeric material with aggregate, as shown in FIGS. 12 and 13.

(20) As can be seen in the new proposed design, if material can be added to increase the useful life of the valve, without the problems that this would generate in the conventional full-port sleeve, as shown in FIG. 15. e) Lastly, abrasion damage is also mitigated by increasing the effective flow passage area in the obturation zone, which implies a significant decrease in fluid velocity, and therefore a decrease in abrasion damage. This is achieved with the increase in the intermediate section of the sleeve (M′) in the middle of the distance between flanges, as can be seen in FIG. 7 vs 8. We can check what has been indicated, in FIG. 15, where they are shown, a conventional full-port sleeve and a sleeve (M′) with the new proposed design, with the same inlet diameter, at the same opening stroke; the figure shows that the area for the new proposed design is greater, which reduces speeds, thereby reducing abrasion damage.