Anti-backflow corrugated pipe valve

Abstract

The utility model discloses an anti-backflow corrugated pipe valve, which relates to the field of corrugated pipe valves, and comprises a corrugated pipe valve, a limiting lantern ring is arranged on one side of the inner surface of the corrugated pipe valve deviating to an inlet of the corrugated pipe valve, guide rods are uniformly distributed on one side of the limiting lantern ring far away from the inlet of the corrugated pipe valve, and the other ends of the guide rods are fixedly connected to one side of a mounting ring. A spring reset rod is arranged on the side, close to the limiting lantern ring, of the ring frame, and a sealing block is fixedly connected to the end, close to the limiting lantern ring, of the spring reset rod. When liquid enters the pipe valve inlet, the pressure of the liquid directly acts on the sealing block to push the sealing block to be separated from the limiting lantern ring, so that the liquid can smoothly flow into the pipe valve inlet through the limiting lantern ring, and when the liquid stops flowing, the spring reset rod quickly plays a role to pull the sealing block back to the original position. The insertion block is pushed into the closing groove again, sealing of the sealing block and the limiting lantern ring is achieved, and the backflow phenomenon of fluid in the corrugated pipe valve is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the field of bellows valves, and specifically relates to an anti-backflow bellows valve. Background Technique

[0002] A bellows valve is a pressure-balanced regulating valve with a compact valve body structure. The fluid passage is in an S streamline shape, with small pressure drop loss, large flow rate, and wide adjustable range. In a fluid transmission system, especially in occasions where the fluid flow direction needs to be strictly controlled, such as in industries like chemical engineering, petroleum, pharmaceuticals, and water treatment, preventing fluid backflow is crucial.

[0003] When the existing bellows valve controls the fluid flow direction, especially when the fluid pressure fluctuates greatly, it is difficult to ensure an effective anti-backflow effect. Moreover, the existing bellows valve achieves sealing by squeezing the left and right end faces of the internal sealing component of the pipe valve. After long-term use, wear occurs at the edge of the sealing component, affecting the anti-backflow effect of the bellows valve. Therefore, the utility model proposes an anti-backflow bellows valve. Content of the Utility Model

[0004] The purpose of the utility model is to provide an anti-backflow bellows valve to solve the problems mentioned in the above background technique, that is, when the existing bellows valve controls the fluid flow direction, especially when the fluid pressure fluctuates greatly, it is difficult to ensure an effective anti-backflow effect, and the existing bellows valve achieves sealing by squeezing the left and right end faces of the internal sealing component of the pipe valve. After long-term use, wear occurs at the edge of the sealing component, affecting the anti-backflow effect of the bellows valve.

[0005] To achieve the above purpose, the utility model provides the following technical solution:

[0006] An anti-backflow bellows valve, including a bellows valve. One side wall at the bottom of the bellows valve is threadedly connected with a pipe valve inlet, and the side wall of the bellows valve far from the pipe valve inlet is threadedly connected with a pipe valve outlet. A limiting collar is arranged on the inner surface of the bellows valve on the side closer to the pipe valve inlet. The limiting collar is in a hollow annular structure. Guide rods are evenly distributed on the side of the limiting collar far from the pipe valve inlet, and the other ends of the guide rods are fixedly connected to one side of an installation ring. A ring frame is installed inside the installation ring. A spring return rod is arranged on the side of the ring frame closer to the limiting collar, and a sealing block is fixedly connected to the end of the spring return rod closer to the limiting collar.

[0007] Optionally, a mating groove is evenly opened on the side of the limiting collar closer to the sealing block.

[0008] Optionally, the sealing block is in a cylindrical structure, and a number of connecting blocks are correspondingly arranged on the outer side of the sealing block with respect to the mating groove. An insertion block is fixedly connected to the side of the connecting block closer to the mating groove.

[0009] Optionally, connecting rods are staggeredly distributed on the outer side of the sealing block with respect to the connecting block, and one end of the connecting rod extending outward is fixedly connected to a sleeve sleeved on the outer part of the guide rod.

[0010] Optionally, the sleeve is slidably sleeved on the outer part of the guide rod.

[0011] Optionally, the pipe valve outlet and the pipe valve inlet are symmetrically distributed with the bellows valve as the center. The inside of the pipe valve outlet is communicated with the inside of the bellows valve, and the pipe valve outlet is communicated with the pipe valve inlet through the bellows valve.

[0012] Optionally, the plug is adapted to the mating groove.

[0013] The beneficial effects of the present utility model are as follows:

[0014] When liquid enters the inside of the pipe valve inlet in the present utility model, the liquid pressure directly acts on the sealing block, pushing the sealing block away from the limiting collar. During this process, the plug on the sealing block disengages from the mating groove of the limiting collar, enabling the liquid to smoothly flow into the inside of the pipe valve inlet through the limiting collar. When the liquid stops flowing, the spring return rod quickly comes into play. By sliding the sleeve on the guide rod, the sealing block is pulled back to its original position, and the plug is pushed back into the mating groove again, achieving the sealing between the sealing block and the limiting collar, effectively preventing the reverse flow of the fluid in the bellows valve. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of an anti-backflow bellows valve of the present utility model;

[0016] Figure 2 is a sectional view of the present utility model;

[0017] Figure 3 is a sectional view of the present utility model from another perspective;

[0018] Figure 4 is a schematic structural diagram of the anti-backflow assembly in the present utility model.

[0019] The reference numerals in the drawings are:

[0020] 1. Bellows valve; 2. Pipe valve inlet; 3. Pipe valve outlet;

[0021] 4. Limiting collar; 401. Mating groove;

[0022] 5. Guide rod; 6. Mounting ring; 7. Ring frame; 8. Spring return rod; 9. Sealing block; 10. Connecting block; 11. Plug; 12. Connecting rod; 13. Sleeve. Detailed Embodiment

[0023] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] The following will describe this in conjunction with the preferred embodiments of the device of the present utility model.

[0025] Please refer to Figures 1-4 As shown, the anti-backflow bellows valve includes a bellows valve 1. One side wall at the bottom of the bellows valve 1 is threadedly connected to a pipe valve inlet 2, and one side wall of the bellows valve 1 away from the pipe valve inlet 2 is threadedly connected to a pipe valve outlet 3. A limiting collar 4 is provided on the inner surface of the bellows valve 1 on the side closer to the pipe valve inlet 2. The limiting collar 4 is of a hollow annular structure. The limiting collar 4 cooperates with the insertion block 11 on the sealing block 9 through the engaging groove 401 thereon to achieve the sealing function. Guide rods 5 are evenly distributed on the side of the limiting collar 4 away from the pipe valve inlet 2, and the other ends of the guide rods 5 are fixedly connected to one side of the mounting ring 6. A ring frame 7 is installed inside the mounting ring 6. The guide rods 5 provide stable support and guidance for the sealing block 9 and its connecting components, ensuring the smoothness of the sealing block 9 during the reset process. A spring return rod 8 is provided on the side of the ring frame 7 close to the limiting collar 4, which pushes the sealing block 9 to reset when the fluid stops flowing, achieving the sealing function, and one end of the spring return rod 8 close to the limiting collar 4 is fixedly connected to the sealing block 9.

[0026] The pipe valve outlet 3 and the pipe valve inlet 2 are symmetrically distributed with the bellows valve 1 as the center. The inside of the pipe valve outlet 3 is communicated with the inside of the bellows valve 1, and the pipe valve outlet 3 is communicated with the pipe valve inlet 2 through the bellows valve 1.

[0027] In another embodiment provided by the present utility model, as Figure 2 、 3 and shown in 4, engaging grooves 401 are evenly opened on the side of the limiting collar 4 close to the sealing block 9.

[0028] Furthermore, the sealing block 9 is of a cylindrical structure, and a number of connecting blocks 10 are correspondingly provided on the outside of the sealing block 9 with respect to the engaging grooves 401. One side of the connecting block 10 close to the engaging groove 401 is fixedly connected to an insertion block 11. The insertion block 11 is adapted to the engaging groove 401. When the sealing block 9 is pushed by the fluid pressure, the insertion block 11 will disengage from the engaging groove 401, allowing the fluid to pass through; when the fluid stops flowing, the sealing block 9 will reset under the action of the spring return rod 8, and the insertion block 11 will be inserted into the engaging groove 401 again to achieve sealing.

[0029] Furthermore, connecting rods 12 are staggered and distributed on the outer side of the sealing block 9 with respect to the connecting block 10. One end of the connecting rod 12 extending outward is fixedly connected to a sleeve 13 sleeved outside the guide rod 5. The sleeve 13 is slidably sleeved outside the guide rod 5, allowing the sealing block 9 to move along the guide rod 5 under the action of fluid pressure. The sleeve 13 can be slidably sleeved outside the guide rod 5 to provide a smooth track for the movement of the sealing block 9. When the sealing block 9 moves under the action of fluid pressure or the spring return rod 8, the connecting rod 12 will drive the sleeve 13 to slide on the guide rod 5, thereby ensuring the smooth movement and precise positioning of the sealing block 9.

[0030] During use, when the fluid enters the bellows valve 1 from the pipe valve inlet 2, the fluid pressure directly acts on the sealing block 9. As the fluid pressure increases, the sealing block 9 is pushed in the direction away from the pipe valve inlet 2, and at the same time, the insertion block 11 is driven to disengage from the engaging groove 401 of the limit collar 4. At this time, the fluid can flow into the interior of the bellows valve 1 through the limit collar 4 and finally flow out from the pipe valve outlet 3. When the fluid stops flowing, the spring return rod 8 starts to work using the elastic force of the spring, pushing the sealing block 9 to move along the guide rod 5 in the direction of the pipe valve inlet 2. During the movement, the connecting rod 12 slides on the guide rod 5 through the sleeve 13 to ensure the smooth movement of the sealing block 9. When the sealing block 9 moves to a certain position, the insertion block 11 is pushed back into the engaging groove 401 of the limit collar 4 to form a tight seal, thereby preventing the fluid from flowing back.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A backflow prevention bellows valve, characterized in that: It includes a bellows valve (1). One side wall at the bottom of the bellows valve (1) is threadedly connected to a pipe valve inlet (2). One side wall of the bellows valve (1) away from the pipe valve inlet (2) is threadedly connected to a pipe valve outlet (3). On the inner surface of the bellows valve (1) and on the side closer to the pipe valve inlet (2), there is a limiting collar (4). The limiting collar (4) has a hollow annular structure. On the side of the limiting collar (4) away from the pipe valve inlet (2), guide rods (5) are evenly distributed, and the other ends of the guide rods (5) are fixedly connected to one side of a mounting ring (6). A ring frame (7) is installed inside the mounting ring (6). On the side of the ring frame (7) closer to the limiting collar (4), there is a spring return rod (8), and the end of the spring return rod (8) closer to the limiting collar (4) is fixedly connected to a sealing block (9).

2. The anti-backflow corrugated pipe valve according to claim 1, characterized in that: On the side of the limiting collar (4) closer to the sealing block (9), engaging grooves (401) are evenly formed.

3. The anti-backflow corrugated pipe valve according to claim 1, characterized in that: The sealing block (9) has a cylindrical structure, and on the outer side of the sealing block (9) and corresponding to the engaging grooves (401), a number of connecting blocks (10) are provided. On the side of the connecting block (10) closer to the engaging groove (401), a plug block (11) is fixedly connected.

4. The anti-backflow corrugated pipe valve according to claim 3, characterized in that: On the outer side of the sealing block (9) and staggered with the connecting blocks (10), there are connecting rods (12). The outer ends of the connecting rods (12) extending outward are fixedly connected to a sleeve (13) sleeved outside the guide rod (5).

5. The anti-backflow corrugated pipe valve according to claim 4, characterized in that: The sleeve (13) is slidably sleeved outside the guide rod (5).

6. The anti-backflow corrugated pipe valve according to claim 1, wherein: The pipe valve outlet (3) and the pipe valve inlet (2) are symmetrically distributed with the bellows valve (1) as the center. The inside of the pipe valve outlet (3) is in communication with the inside of the bellows valve (1). The pipe valve outlet (3) is connected to the pipe valve inlet (2) through the bellows valve (1).

7. The anti-backflow corrugated pipe valve according to claim 3, wherein: The plug block (11) is adapted to the engaging groove (401).

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