Conveniently maintained double-seated swing check valve

Abstract

The utility model provides a kind of convenient maintenance's double-clamp double-petal swing check valve with simple structure, convenient maintenance, including valve body, fluid passage being opened on valve body, valve seat installation part being opened on valve body, and a detachable valve seat module, the valve seat module is slidably worn in valve body, the end of the valve seat module is resisted with valve seat installation part and the inner chamber of valve seat module is communicated with fluid passage, the valve seat module is equipped with valve clack, the valve body is equipped with the fixing device of fixed valve seat module, and the elastic sealing device for preventing leakage is equipped between the valve seat module and valve seat installation part.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a convenient-to-maintain double-disc rotary check valve. Background Technology

[0002] The double-disc rotary check valve is a type of butterfly check valve, which utilizes the sealing surfaces of the two valve discs to fit snugly against the sealing surfaces of the valve seat to achieve a seal in the valve passage. Because the original double-disc rotary check valve had its valve seat integrated with the valve body, it was not only inconvenient to manufacture and process, but also difficult to repair once the valve discs were damaged, often requiring the valve to be scrapped, which was detrimental to users.

[0003] This utility model was developed to solve this problem. Utility Model Content

[0004] Therefore, in view of the above problems, this utility model proposes a simple and easy-to-maintain double-disc rotary check valve.

[0005] A convenient-to-maintain double-disc rotary check valve includes a valve body, a fluid passage on the valve body, a valve seat mounting portion on the valve body, and a detachable valve seat module. The valve seat module is slidably inserted into the valve body, the end of the valve seat module resists the valve seat mounting portion, and the inner cavity of the valve seat module is connected to the fluid passage. A valve disc is provided inside the valve seat module. A fixing device for fixing the valve seat module is provided inside the valve body. An elastic sealing device to prevent leakage is provided between the valve seat module and the valve seat mounting portion.

[0006] A further improvement is made to the fixing device, which includes a first fixing block and a second fixing block arranged symmetrically. The valve seat module has a first fixing channel and a second fixing channel correspondingly opened on its pipe wall. The first fixing channel and the second fixing channel are window-like holes opened in the pipe wall of the valve seat module. The valve body has a first sliding channel and a second sliding channel. The first fixing block and the second fixing block are respectively slidably disposed in the first sliding channel and the second sliding channel and can slide into the first fixing channel and the second fixing channel respectively. The valve body is provided with a sliding device for driving the first fixing block and the second fixing block to slide.

[0007] A further improvement is that the first fixing block and the second fixing block are respectively provided with an outward inclined surface at one end of the first fixing block and the second fixing channel near the center line of the valve body. The hole wall of the first fixing channel and the second fixing channel is a tensioning surface that matches the inclined surface. When the first fixing block and the second fixing block slide into the fixing channel, their inclined surfaces are wedge-fitted with the tensioning surface of the fixing channel, thereby pressing the valve seat module onto the valve seat mounting part.

[0008] A further improvement is made to the sliding device, which includes a first sliding rod and a second sliding rod. A first screw is rotatably mounted in the first sliding channel, and a second screw is rotatably mounted in the second sliding channel. One end of the first sliding rod is connected to a first fixed block, and the other end of the first sliding rod is sleeved on the first screw and threadedly driven by the first screw. One end of the second sliding rod is connected to a second fixed block, and the other end of the second sliding rod is sleeved on the second screw and threadedly driven by the second screw. The valve body is provided with a linkage device that simultaneously drives the first screw and the second screw to rotate.

[0009] A further improvement is that the linkage device includes a linkage rod, one end of which is connected to a first screw, and the other end of which is connected to a second screw. The second screw has a thread opposite to that of the first screw, and the other end of the second screw extends out of the valve body.

[0010] A further improvement is that the sealing device includes a sealing ring, the valve seat mounting portion is provided with a sealing groove, the sealing ring is slidably disposed in the sealing groove and one end can slide out of the sealing groove, and the sealing groove is provided with abutting member to abut the sealing ring.

[0011] A further improvement is that the abutment is composed of a plurality of springs, one end of which is connected to a sealing ring, and the other end of which is connected to the inner wall of the sealing groove.

[0012] A further improvement is that a handle is provided on the second screw.

[0013] A further improvement is that a guide block is provided on the periphery of the valve seat module, a guide groove is provided on the valve body, and the guide block is located in the guide groove.

[0014] By adopting the aforementioned technical solution, the beneficial effects of this utility model are: The structure is simple and easy to replace and maintain. The valve disc is located on the valve seat module, which is manufactured separately from the valve body. This not only simplifies manufacturing but also facilitates replacement. If the valve disc or valve seat module is damaged, it can be removed for replacement and repair, greatly simplifying the operation for staff. The valve seat module achieves quick, secure locking and sealing through a wedge-fitting engagement between the fixing block and the inclined surface of the fixing channel. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural diagram of a convenient-to-maintain double-disc rotary check valve according to an embodiment of this utility model.

[0016] Figure 2 This is a cross-sectional structural diagram of a convenient-to-maintain double-disc rotary check valve according to an embodiment of this utility model.

[0017] Figure 3 This is a schematic diagram of the fixing device structure according to an embodiment of the present utility model.

[0018] Figure 4 This is an enlarged structural schematic diagram of embodiment A of this utility model.

[0019] Figure 5 This is an enlarged structural schematic diagram of embodiment B of this utility model. Detailed Implementation

[0020] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0021] refer to Figure 1-5 The present invention discloses a convenient maintenance-friendly double-disc rotary check valve, comprising a valve body 1, a fluid channel 2 provided on the valve body 1, a valve seat mounting portion provided on the valve body 1, and a valve seat module 3. The valve seat module 3 is slidably disposed within the valve body 1, the end of the valve seat module 3 resists the valve seat mounting portion, and the inner cavity of the valve seat module 3 is connected to the fluid channel 2. A valve disc 5 is provided inside the valve seat module 3. A fixing device for fixing the valve seat module 3 is provided inside the valve body 1. An elastic sealing device for preventing water leakage is provided between the valve seat module 3 and the valve seat mounting portion.

[0022] Specifically, the fixing device includes a first fixing block 6, a second fixing block 7, a first sliding rod 61, and a second sliding rod 71 symmetrically arranged. The valve seat module 3 has a first fixing channel 31 and a second fixing channel 32 on its pipe wall. The first fixing channel 31 is a rectangular window hole penetrating the pipe wall of the valve seat module 3. The valve body 1 has a first sliding channel 9 and a second sliding channel 11. The first fixing block 6 and the second fixing block 7 are slidably disposed within the first sliding channel 9 and the second sliding channel 11, respectively. A first screw 8 is rotatably disposed within the first sliding channel 9, and a second screw 10 is rotatably disposed within the second sliding channel 11. One end of the first sliding rod 61 is connected to the first fixed block 6, and the other end of the first sliding rod 61 is sleeved on the first screw 8 and threadedly driven by the first screw 8. One end of the second sliding rod 71 is connected to the second fixed block 7, and the other end of the second sliding rod 71 is sleeved on the second screw 10 and threadedly driven by the second screw 10. The valve body 1 is provided with a connecting rod that simultaneously drives the first screw 8 and the second screw 10 to rotate. The connecting rod rotatably passes through the valve body 1. One end of the connecting rod is connected to the first screw 8, and the other end of the connecting rod is connected to the second screw 10. The second screw 10 has the opposite thread to the first screw 8, and the other end of the second screw 10 passes through the valve body 1.

[0023] More specifically, the head of the first fixing block 6 has an inclined surface 64. Correspondingly, the hole wall of the first fixing channel 31 near the center line of the valve body 1 forms a tensioning surface that matches the angle of the inclined surface 64. When the handle 12 is rotated to drive the first fixing block 6 to move towards the valve seat module 3, the inclined surface 64 of the fixing block head slides along the tensioning surface of the fixing channel. Since the tensioning surface is fixed, this inclined surface movement will continuously press the valve seat module 3 towards the valve seat mounting part, generating a strong preload, thereby achieving "resistance to tensioning" and reliable fixing. The cooperation relationship between the second fixing block 7 and the second fixing channel 32 is exactly the same.

[0024] Preferably, the sealing device includes a sealing ring 13, and a sealing groove is provided around the valve seat mounting portion. The sealing ring 13 is slidably disposed within the sealing groove, with one end able to slide out of the sealing groove. A plurality of springs 14 are provided within the sealing groove to abut against the sealing ring 13. One end of each spring 14 is connected to the sealing ring 13, and the other end of each spring 14 is connected to the inner wall of the sealing groove. When the valve seat module 3 slides into position and abuts against the valve seat mounting portion, the sealing ring 13 is compressed. The sealing ring 13 slides, compressing the springs 14, which release their elasticity, causing the sealing ring 13 to press tightly against the end face of the valve seat module 3, thereby ensuring the sealing between the valve seat module 3 and the valve seat mounting portion.

[0025] In order to better rotate the second screw 10, a handle 12 is provided on the second screw 10.

[0026] To enable the first fixing block 6 and the second fixing block 7 to engage with the first fixing channel 31 and the second fixing channel 32, a guide block 4 is provided on the periphery of the valve seat module 3, and a guide groove is provided on the valve body 1, with the guide block 4 disposed within the guide groove. The cooperation between the guide block 4 and the guide groove ensures that, during installation, the first fixing channel 31 and the second fixing channel 32 on the valve seat module 3 can be accurately aligned with the moving paths of the first fixing block 6 and the second fixing block 7.

[0027] Working principle: In use, when repairing valve disc 5 or valve seat module 3, turn handle 12 to drive the first screw 8 and the second screw 10 to rotate synchronously via the connecting rod. Due to the effect of the threaded pair, the first sliding rod 61 and the second sliding rod 71 drive the first fixed block 6 and the second fixed block 7 to slide away from each other, causing their inclined surfaces 64 to disengage from the tensioning surfaces of the first fixed channel 31 and the second fixed channel 32, releasing the wedge-tight engagement. Then the valve seat module 3 can be directly pulled out.

[0028] During installation, align the guide block 4 of the new or repaired valve seat module 3 with the guide groove of the valve body 1 and push it in until its end presses against the sealing ring 13. Then, rotate the handle 12 in the opposite direction to drive the first fixing block 6 and the second fixing block 7 to slide towards each other. When the inclined surface 64 of the fixing block enters the fixing channel and contacts the tensioning surface, continue to screw the handle in. The inclined surface mechanism starts to work, firmly wedging the valve seat module 3 into the valve body 1, thereby completing the fixing and sealing.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions above are only illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A convenient-to-maintain double-disc rotary check valve, characterized in that: The valve includes a valve body, a fluid passage on the valve body, a valve seat mounting portion on the valve body, and a detachable valve seat module. The valve seat module is slidably inserted into the valve body. The end of the valve seat module resists the valve seat mounting portion, and the inner cavity of the valve seat module is connected to the fluid passage. A valve disc is provided inside the valve seat module. A fixing device for fixing the valve seat module is provided inside the valve body. An elastic sealing device to prevent leakage is provided between the valve seat module and the valve seat mounting portion.

2. The convenient-to-maintain double-disc rotary check valve according to claim 1, characterized in that: The fixing device includes a first fixing block and a second fixing block arranged symmetrically. The valve seat module has a first fixing channel and a second fixing channel correspondingly opened on its tube wall. The first fixing channel and the second fixing channel are window-type holes opened in the tube wall of the valve seat module. The valve body has a first sliding channel and a second sliding channel. The first fixing block and the second fixing block are respectively slidably disposed in the first sliding channel and the second sliding channel and can slide into the first fixing channel and the second fixing channel respectively. The valve body is provided with a sliding device for driving the first fixing block and the second fixing block to slide.

3. The convenient-to-maintain double-disc rotary check valve according to claim 2, characterized in that: The first fixing block and the second fixing block have an inclined surface that slopes outward at one end of the first fixing block and the second fixing channel. The hole wall of the first fixing channel and the second fixing channel near the center line of the valve body is a tensioning surface that matches the inclined surface. When the first fixing block and the second fixing block slide into the fixing channel, their inclined surfaces wedge tightly with the tensioning surface of the fixing channel, thereby pressing the valve seat module onto the valve seat mounting part.

4. A convenient-to-maintain double-disc rotary check valve according to claim 3, characterized in that: The sliding device includes a first sliding rod and a second sliding rod. A first screw is rotatably disposed in the first sliding channel, and a second screw is rotatably disposed in the second sliding channel. One end of the first sliding rod is connected to a first fixed block, and the other end of the first sliding rod is sleeved on the first screw and threadedly driven by the first screw. One end of the second sliding rod is connected to a second fixed block, and the other end of the second sliding rod is sleeved on the second screw and threadedly driven by the second screw. The valve body is provided with a linkage device that simultaneously drives the first screw and the second screw to rotate.

5. A convenient-to-maintain double-disc rotary check valve according to claim 4, characterized in that: The linkage device includes a linkage rod, one end of which is connected to a first screw, and the other end of which is connected to a second screw. The second screw has a thread opposite to that of the first screw, and the other end of the second screw extends out of the valve body.

6. The convenient-to-maintain double-disc rotary check valve according to claim 1, characterized in that: The sealing device includes a sealing ring, and the valve seat mounting part is provided with a sealing groove around it. The sealing ring is slidably disposed in the sealing groove and one end can slide out of the sealing groove. A supporting member is provided in the sealing groove to abut against the sealing ring.

7. A convenient-to-maintain double-disc rotary check valve according to claim 6, characterized in that: The abutting component consists of a plurality of springs, one end of which is connected to a sealing ring, and the other end of which is connected to the inner wall of the sealing groove.

8. A convenient-to-maintain double-disc rotary check valve according to claim 4, characterized in that: The second screw is equipped with a handle.

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