Adjustable clamping valve

Abstract

The utility model provides an adjustable clamping valve, which belongs to the technical field of clamping valves and comprises a plurality of flange pipes, one side of each flange pipe is provided with a flange face, the side wall of each flange face is fixedly connected with a sealing pipe, the end of each sealing pipe is fixedly connected with a sealing shell, and a rubber pipe is arranged between each flange pipe and the corresponding flange face. Air cylinders are fixedly connected to the two side walls, in the length direction, of the sealing shell correspondingly, a ventilation pipe is arranged at the bottom of the sealing shell, pistons are arranged in the air cylinders in a sliding mode, telescopic rods are fixedly connected to the side walls of the pistons, springs are arranged on the outer side walls of the telescopic rods in a sleeving mode correspondingly, and the ends of the two telescopic rods are connected with a groove rod and a convex face rod correspondingly. The groove rod and the convex face rod are elastically connected with the corresponding pistons through springs, an air inlet mechanism is arranged at the top of the air cylinder, and an air return mechanism is arranged at the bottom of the air cylinder. According to the utility model, the elastic memory of the rubber tube caused by cyclic extrusion is eliminated through the continuous negative pressure effect, and the phenomenon that the rubber tube cannot completely rebound is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping valves, in particular to an adjustable clamping valve. Background Art

[0002] Pinch valves, also known as pipe clamp valves, airbag valves, or pinch valves, are specialized valves with a rubber sleeve as their core component. They are widely used in industrial environments requiring flexible control of fluid flow, particularly in handling media containing solid particles, corrosive, or abrasive materials. Their unique operating principle and structural design offer significant advantages in numerous applications. These valves are essentially comprised of a valve body, a rubber sleeve, and a mechanism for controlling gas input. As a core component, the rubber sleeve not only provides the necessary sealing but also resists corrosion, wear, and operating pressure, directly determining the valve's performance and service life.

[0003] While pinch valves offer numerous advantages in many industrial applications, they also have inherent limitations and potential problems. A key challenge lies in the long-term durability and deformation recovery capabilities of the rubber sleeve. During continuous operation, pinch valves rely on the compression of the rubber sleeve to block the flow. However, when the rubber material is under pressure for extended periods, especially in applications with frequent opening and closing cycles, the rubber sleeve may experience a phenomenon known as "elastic memory." This means that after repeated squeezing, the rubber material may not fully recover to its original shape, resulting in a certain degree of permanent deformation and, in turn, reduced flow. How to invent an adjustable pinch valve to address these issues has become a pressing issue for those skilled in the art. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides an adjustable clamping valve, which aims to solve the problem that the rubber material is under pressure for a long time and the flow rate is reduced due to elastic memory.

[0005] The utility model is achieved in this way:

[0006] The utility model provides an adjustable clamping valve, comprising a plurality of flange tubes, wherein a flange surface is provided on one side of the flange tube, a sealing tube is fixedly connected to the side wall of the flange surface, and an end of the sealing tube is fixedly connected to a sealing shell, a rubber tube is provided between the flange tube and the flange surface, both side walls of the sealing shell in the length direction are fixedly connected to a cylinder, a vent pipe is provided at the bottom of the sealing shell, a piston is slidingly provided inside the cylinder, a telescopic rod is fixedly connected to the side wall of the piston, and a spring is sleeved on the outer side wall of the telescopic rod, the ends of the two telescopic rods are respectively connected to a groove rod and a convex rod, the groove rod and the convex rod are elastically connected to their corresponding pistons by springs, an air intake mechanism is provided at the top of the cylinder, and an air return mechanism is provided at the bottom of the cylinder.

[0007] Preferably, bolts are provided on the flange tube, a plurality of protrusions are provided on the side wall of the flange surface, a plurality of small holes are provided on the side wall of the rubber tube, the number of the protrusions and the small holes are the same and the positions correspond, a threaded hole is provided on the flange surface, the flange tube and the flange surface clamp the rubber tube, and the flange tube and the flange surface are fixedly connected by bolts.

[0008] Preferably, the ventilation pipe penetrates the sealing shell and is connected to the cylinder, the position where the ventilation pipe penetrates the sealing shell is closed with the sealing shell, a plurality of arc baffles are provided inside the sealing tube, the two sides of the arc baffle are fixedly connected to the sealing shell and the flange surface respectively, the inner wall of the arc baffle is fitted with the outer wall of the rubber tube, a deformation reserved groove is provided on one side of the arc baffle, a limiting spring is provided inside the cylinder, and the end of the limiting spring is fixedly connected to the inner wall of the sealing shell.

[0009] Preferably, the intake mechanism includes an intake valve body fixedly connected to the top of the cylinder, the inner side wall of the intake valve body is fixedly connected to an intake valve plug, the top of the intake valve plug is provided with an intake valve ball, and the top of the intake valve ball is provided with an intake push spring.

[0010] Preferably, the intake valve ball is set to block the intake valve, the intake push spring is set to squeeze the top intake valve body and the bottom intake valve ball, and a plurality of intake holes are opened on the side wall of the intake valve body, and the intake holes are connected to the cylinder.

[0011] Preferably, the return air mechanism includes a return air valve body fixedly connected to the bottom of the cylinder, the inner side wall of the return air valve body is fixedly connected to a return air valve plug, a return air through hole is opened on the return air valve plug, a return air valve ball is provided on the top of the return air valve plug, and a return air push spring is provided on the top of the return air valve ball.

[0012] Preferably, the return air valve ball is arranged to block the return air valve, the return air push spring is arranged to squeeze the top cylinder and the bottom return air valve ball, and the return air through hole is arranged to communicate with the cylinder.

[0013] The beneficial effects of the utility model are as follows: by extracting air from the vent pipe, the piston is sucked back and retracted, and the piston continues to move to connect the vent pipe with the return valve body. Due to continuous air extraction, negative pressure is generated in the sealing shell, which causes the squeezed position of the rubber tube to retract, and the elastic memory of the rubber tube caused by cyclic squeezing is eliminated by the continuous negative pressure, preventing the phenomenon of incomplete rebound, so that the rubber tube does not produce permanent deformation, and ensures that the flow rate will not be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of an adjustable clamping valve provided in an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the position of an adjustable clamping valve rubber tube provided by an embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of an adjustable clamping valve rubber tube provided by an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of an adjustable clamping valve sealing housing provided by an embodiment of the present utility model;

[0019] Figure 5 This is a schematic diagram of the position of an adjustable arc baffle of a clamping valve provided by an embodiment of the utility model;

[0020] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0021] In the figure: 1. Flange pipe; 2. Flange surface; 3. Sealing pipe; 4. Sealing shell; 5. Rubber tube; 6. Bolt; 7. Bump; 8. Small hole; 9. Cylinder; 10. Vent pipe; 11. Inlet valve body; 12. Return valve body; 13. Grooved rod; 14. Convex rod; 15. Arc baffle; 16. Deformation reserved groove; 17. Piston; 18. Telescopic rod; 19. Spring; 20. Inlet valve plug; 21. Inlet valve ball; 22. Inlet through hole; 23. Inlet push spring; 24. Return valve plug; 25. Return valve ball; 26. Return push spring; 27. Return through hole; 28. Limit spring. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example, refer to Figures 1-6, an adjustable clamping valve, including multiple flange pipes 1, a flange surface 2 is provided on one side of the flange pipe 1, a sealing tube 3 is fixedly connected to the side wall of the flange surface 2, and the end of the sealing tube 3 is fixedly connected to the sealing shell 4, a rubber tube 5 is provided between the flange pipe 1 and the flange surface 2, both side walls of the sealing shell 4 in the length direction are fixedly connected to a cylinder 9, a vent pipe 10 is provided at the bottom of the sealing shell 4, a piston 17 is slidingly provided inside the cylinder 9, a telescopic rod 18 is fixedly connected to the side wall of the piston 17, and a spring 19 is sleeved on the outer wall of the telescopic rod 18, and the ends of the two telescopic rods 18 are respectively connected to a groove rod 13 and a convex rod 14, and the groove rod 13 and the convex rod 14 are elastically connected to their corresponding pistons 17 by springs 19, an air intake mechanism is provided on the top of the cylinder 9, and an air return mechanism is provided at the bottom of the cylinder 9; Bolt 6, the side wall of the flange surface 2 is provided with multiple protrusions 7, and the side wall of the rubber tube 5 is provided with multiple small holes 8. The number of protrusions 7 and the small holes 8 are the same and the positions correspond. A threaded hole is provided on the flange surface 2, and the flange tube 1 and the flange surface 2 clamp the rubber tube 5, and the flange tube 1 and the flange surface 2 are fixedly connected by bolts 6; the ventilation pipe 10 penetrates the sealing shell 4 and is connected to the cylinder 9, and the position where the ventilation pipe 10 penetrates the sealing shell 4 is closed with the sealing shell 4. A plurality of arc baffles 15 are provided inside the sealing tube 3, and the two sides of the arc baffle 15 are respectively fixedly connected to the sealing shell 4 and the flange surface 2. The inner wall of the arc baffle 15 is fitted with the outer wall of the rubber tube 5, and a deformation reserved groove 16 is provided on one side of the arc baffle 15. A limit spring 28 is provided inside the cylinder 9, and the end of the limit spring 28 is fixedly connected to the inner wall of the sealing shell 4.

[0024] Reference Figure 4-Figure 6The air intake mechanism includes an air intake valve body 11 fixedly connected to the top of the cylinder 9, the inner side wall of the air intake valve body 11 is fixedly connected to an air intake valve plug 20, the top of the air intake valve plug 20 is provided with an air intake valve ball 21, and the top of the air intake valve ball 21 is provided with an air intake push spring 23; the air intake valve ball 21 is provided to block the air intake valve plug 20, and the air intake push spring 23 is provided to squeeze the top air intake valve body 11 and the bottom air intake valve ball 21, and a plurality of air intake holes 22 are provided on the side wall of the air intake valve body 11, and the air intake holes 22 are connected to the cylinder 9; the air return mechanism includes a air return valve body 12 fixedly connected to the bottom of the cylinder 9, the inner side wall of the air return valve body 12 is fixedly connected to a air return valve plug 24, and the air return valve plug 24 is provided with an air return hole 27. 4 is provided with a return valve ball 25, and a return valve push spring 26 is provided on the top of the return valve ball 25; the return valve ball 25 is provided to seal the return valve plug 24, and the return valve push spring 26 is provided to squeeze the top cylinder 9 and the bottom return valve ball 25, and the return air through hole 27 is connected to the cylinder 9; by extracting air from the vent pipe 10, the piston 17 is sucked back and retracted, and the piston 17 continues to move to connect the vent pipe 10 with the return valve body 12. Due to continuous extraction of air, negative pressure is generated in the sealing shell 4, which causes the squeezed position of the rubber tube 5 to retract, and the continuous negative pressure eliminates the elastic memory of the rubber tube 5 caused by the cyclic extrusion, preventing the phenomenon of inability to fully rebound, so that the rubber tube 5 does not produce permanent deformation, and ensures that the flow rate will not be reduced.

[0025] The working principle of this adjustable clamping valve: when the clamping valve is not pressurized, the liquid in the rubber tube 5 passes freely without resistance. When the flow rate needs to be controlled, compressed gas is injected into the vent pipe 10. The compressed gas reaches the inside of the cylinder 9 through the vent pipe 10 and continuously provides compressed gas. The compressed gas pushes the piston 17 to move in the direction of the telescopic rod 18. The telescopic rod 18 drives the groove rod 13 and the convex rod 14 to move closer, squeezing the side wall of the rubber tube 5. Continuous squeezing will reduce the space inside the rubber tube 5, thereby adjusting the flow rate. Continue to inject compressed air until the rubber tube 5 is completely blocked. When the air pressure exceeds the elastic force of the intake push spring 23, the compressed gas pushes open the intake valve ball 21 pressed on the intake valve plug 20, and enters the sealing shell from the intake through hole 22. Inside the body 4, continuous pressure is applied to the rubber tube 5 to expand the sealed area of ​​the rubber tube 5 and strengthen the sealing effect of the rubber tube 5. When the sealed rubber tube 5 needs to be opened, air is extracted from the vent pipe 10, and the piston 17 is sucked back and squeezes the limit spring 28. The piston 17 continues to move to connect the vent pipe 10 with the return valve body 12. The gas in the sealed shell 4 pushes the return valve ball 25 from the return hole 27 and is discharged from the sealed shell 4 through the cylinder 9. During continuous air extraction, negative pressure is generated in the sealed shell 4, causing the squeezed position of the rubber tube 5 to retract, and the elastic memory of the rubber tube 5 caused by the cyclic extrusion is eliminated through the continuous negative pressure, preventing the phenomenon of inability to fully rebound, so that the rubber tube 5 does not produce permanent deformation, and ensures that the flow rate will not be reduced.

[0026] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An adjustable clamping valve comprising a plurality of flange pipes (1), characterized in that: A flange surface (2) is provided on one side of the flange tube (1), a sealing tube (3) is fixedly connected to the side wall of the flange surface (2), and the end of the sealing tube (3) is fixedly connected to the sealing shell (4). A rubber tube (5) is provided between the flange tube (1) and the flange surface (2), and both side walls of the sealing shell (4) in the longitudinal direction are fixedly connected to the cylinder (9). The bottom of the sealing shell (4) is provided with a vent pipe (10), and a piston (17) is slidably provided inside the cylinder (9). The side wall of the piston (17) is fixedly connected to a telescopic rod (18), and the outer side wall of the telescopic rod (18) is sleeved with a spring (19). The ends of the two telescopic rods (18) are respectively connected to a groove rod (13) and a convex rod (14), and the groove rod (13) and the convex rod (14) are elastically connected to their corresponding pistons (17) through springs (19). The top of the cylinder (9) is provided with an air intake mechanism, and the bottom of the cylinder (9) is provided with an air return mechanism.

2. An adjustable pinch valve according to claim 1, characterized in that: The flange pipe (1) is provided with bolts (6), the side wall of the flange surface (2) is provided with a plurality of protrusions (7), the side wall of the rubber tube (5) is provided with a plurality of small holes (8), the number of the protrusions (7) and the small holes (8) are the same and the positions are corresponding, a threaded hole is provided on the flange surface (2), the flange pipe (1) and the flange surface (2) clamp the rubber tube (5), and the flange pipe (1) and the flange surface (2) are fixedly connected by bolts (6).

3. An adjustable pinch valve according to claim 1, characterized in that: The vent pipe (10) penetrates the sealing shell (4) and is connected to the cylinder (9). The position where the vent pipe (10) penetrates the sealing shell (4) is sealed with the sealing shell (4). A plurality of arc baffles (15) are provided inside the sealing tube (3). Both sides of the arc baffles (15) are fixedly connected to the sealing shell (4) and the flange surface (2) respectively. The inner side wall of the arc baffle (15) is fitted with the outer side wall of the rubber tube (5). A deformation reserved groove (16) is provided on one side of the arc baffle (15). A limit spring (28) is provided inside the cylinder (9), and the end of the limit spring (28) is fixedly connected to the inner side wall of the sealing shell (4).

4. An adjustable pinch valve according to claim 1, characterized in that: The air intake mechanism comprises an air intake valve body (11) fixedly connected to the top of the cylinder (9); an air intake valve plug (20) is fixedly connected to the inner side wall of the air intake valve body (11); an air intake valve ball (21) is provided on the top of the air intake valve plug (20); and an air intake push spring (23) is provided on the top of the air intake valve ball (21).

5. An adjustable pinch valve according to claim 4, characterized in that: The intake valve ball (21) is configured to seal the intake valve plug (20), and the intake push spring (23) is configured to squeeze the top intake valve body (11) and the bottom intake valve ball (21). A plurality of intake holes (22) are provided on the side wall of the intake valve body (11), and the intake holes (22) are connected to the cylinder (9).

6. The adjustable pinch valve according to claim 1, characterized in that: The air return mechanism comprises an air return valve body (12) fixedly connected to the bottom of the cylinder (9), an air return valve plug (24) fixedly connected to the inner side wall of the air return valve body (12), an air return hole (27) being provided on the air return valve plug (24), an air return valve ball (25) being provided on the top of the air return valve plug (24), and an air return push spring (26) being provided on the top of the air return valve ball (25).

7. An adjustable pinch valve according to claim 6, characterized in that: The return air valve ball (25) is configured to block the return air valve plug (24), the return air push spring (26) is configured to squeeze the top cylinder (9) and the bottom return air valve ball (25), and the return air through hole (27) is configured to communicate with the cylinder (9).

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