A double-seal check valve for a gas pipeline

Abstract

The utility model discloses a double seal check valve for gas pipeline specifically related to double seal check valve technical field, including valve body, is set up with the through slot on the valve body, is equipped with the dismounting mechanism that seals to the through slot on the valve body, is equipped with the sealing mechanism in the valve body, the dismounting mechanism includes the first sealing plate of being equipped in the valve body top, the first sealing plate bottom can be inserted in the inside of through slot, the valve body bottom is equipped with the second sealing plate, the both sides of first sealing plate and second sealing plate are equipped with the connecting plate, a plurality of first threaded holes are seted up on the connecting plate, and the first bolt is screw -threadedly connected in the first threaded hole of two intercommunication interiors. The utility model discloses through the dismounting mechanism can be convenient for technical personnel to detect the sealing mechanism in the valve body maintenance, prolongs the service life of valve body, still through the second bolt can take out the spring from the valve body interior, is convenient for people to replace the spring, avoids the influence first sealing plate removal.

Description

Technical Field

[0001] This utility model relates to the technical field of double-seal check valves, specifically to a double-seal check valve for gas pipelines. Background Technology

[0002] With the accelerated pace of restructuring in the valve industry, the future competition will be between valve product quality and safety and product brand. Products will develop towards high technology, high parameters, strong corrosion resistance, and long service life. Only through continuous technological innovation, new product development, and technological transformation can the technical level of products be gradually improved to meet the needs of domestic equipment. Check valves on the market achieve a sealing effect through the contact between the valve disc and the valve body, which can control the flow of gas.

[0003] For example, Chinese patent application number 202021942894.3 discloses a sealing plastic double check valve, including a valve body with two check chambers inside. Each check chamber has a connecting port penetrating the side wall of the valve body at its opposite ends, and a communication port is provided between the check chambers. An annular opening is provided on the side wall of each check chamber, and a sealing ring is connected to the annular opening via a pressurizing mechanism. A force-bearing seat is connected to the inner side wall of each check chamber via a support column, and the force-bearing seat is connected to a valve disc via a connecting mechanism. This technical solution achieves a double sealing effect by setting two check chambers within the valve body, and within each check chamber are two sets of valve discs, force-bearing seats, limiting columns, sealing plates, and annular contact elements, ensuring the valve body's sealing performance. A pressure-bearing piston ring is provided at the outermost valve disc. The backflow pressure of the water causes the pressure-bearing piston ring to tighten the moving column, driving the sealing ring to move to the sealing plate on the valve disc, thus sealing the gap between the valve disc and the annular contact element.

[0004] However, the following problems still exist in this technical solution: the valve body is a single piece, and when the internal parts of the valve body are damaged, it is impossible to repair the internal parts, and the whole thing needs to be replaced, which increases the cost of use. Utility Model Content

[0005] The purpose of this utility model is to provide a double-seal check valve for gas pipelines. The disassembly mechanism allows technicians to easily inspect and maintain the sealing mechanism inside the valve body, extending the service life of the valve body. Furthermore, the second bolt allows the spring to be removed from inside the valve body, facilitating spring replacement and avoiding interference with the movement of the first sealing plate, thus solving the aforementioned shortcomings in the technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a double-seal check valve for gas pipelines, comprising a valve body, a through groove on the valve body, a disassembly mechanism for sealing the through groove on the valve body, and a sealing mechanism inside the valve body.

[0007] Preferably, the disassembly mechanism includes a first sealing plate on the top of the valve body, the bottom of which can be inserted into the through groove, a second sealing plate on the bottom of the valve body, and connecting plates on both sides of the first and second sealing plates. The connecting plates have multiple first threaded holes, and two connected first threaded holes are threaded with first bolts for sealing the through groove.

[0008] Preferably, the sealing mechanism includes a third sealing plate disposed inside the valve body, a support plate disposed on one side inside the valve body, first insertion holes on both sides of the third sealing plate, and second insertion holes on both sides of the support plate. A connecting rod is inserted into each of the second insertion holes, one end of the connecting rod being threadedly connected to the first insertion hole. Two insertion slots are provided on both the third sealing plate and the support plate, and a limit plate is inserted into each of the insertion slots. A common spring is fixed between the two limit plates located on the same side. The connecting rod passes through the limit plate. Two fourth sealing plates are disposed inside the valve body, and the two fourth sealing plates are in contact with the third sealing plate for sealing.

[0009] Preferably, a rotating shaft is inserted inside the valve body, and a fifth sealing plate is fixedly provided on the outside of the rotating shaft. The top end of the rotating shaft passes through the valve body and extends out of the top of the valve body. The rotating shaft and the valve body are threaded together. A handle is fixedly provided on the top end of the rotating shaft. Fixing blocks are fixedly provided on both sides inside the valve body. An installation rod is fixedly provided on one side of the fixing block. Mounting holes are opened on both sides of the fifth sealing plate. The installation rod is inserted into the mounting hole for sealing.

[0010] Preferably, the limiting plate, the third sealing plate and the support plate are provided with second threaded holes on both sides, and the two connected second threaded holes are internally threaded with the same second bolt for fixing the limiting plate.

[0011] Preferably, air supply pipes are provided on both sides of the valve body, and multiple third threaded holes are provided on both the air supply pipes and the valve body. The same third bolt is threadedly connected to two interconnected third threaded holes for fixing the air supply pipes.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows: By rotating the first bolt and turning it out of the first threaded hole, and pulling the first sealing plate out of the through groove, technicians can easily inspect and maintain the sealing mechanism inside the valve body, thus extending the service life of the valve body. Rotate the second bolt to unscrew it from the two second threaded holes. Then rotate the connecting rod to unscrew it from the first insertion hole. Pull the connecting rod to remove it from the first sealing plate and the support plate. The spring can then be removed from the valve body, making it easier to replace the spring and avoiding affecting the movement of the first sealing plate. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 This is a front view of the present invention; Figure 2 This is a schematic diagram of the valve body of this utility model; Figure 3 This is a schematic diagram of the structure of the third bolt of this utility model; Figure 4 This is a sectional view of the valve body of this utility model; Figure 5 This is a schematic diagram of the disassembly mechanism of this utility model; Figure 6 This is a schematic diagram of the sealing mechanism of this utility model; Figure 7 This is a schematic diagram of the spring structure of this utility model.

[0015] Explanation of reference numerals in the attached figures: 1. Valve body; 2 Disassembly mechanism, 201 First sealing plate, 202 Second sealing plate, 203 Connecting plate, 204 First threaded hole, 205 First bolt; 3 through slots; 4. Sealing mechanism, 401. Third sealing plate, 402. Support plate, 403. Connecting rod, 404. First insertion hole, 405. Second insertion hole, 406. Limiting plate, 407. Spring, 408. Insertion groove, 409. Second threaded hole, 410. Second bolt, 411. Fourth sealing plate, 412. Rotating shaft, 413. Fifth sealing plate, 414. Handle, 415. Mounting hole, 416. Fixing block, 417. Mounting rod; 5. Gas pipe, 6. Third threaded hole, 7. Third bolt. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0017] This utility model provides, for example Figure 1-7 The diagram shows a double-seal check valve for gas pipelines, comprising a valve body 1, a through groove 3 on the valve body 1, a disassembly mechanism 2 for sealing the through groove 3 on the valve body 1, a sealing mechanism 4 inside the valve body 1, and gas delivery pipes 5 on both sides of the valve body 1. Multiple third threaded holes 6 are provided on both the gas delivery pipes 5 and the valve body 1. Two interconnected third threaded holes 6 are internally threaded with the same third bolt 7. The third bolt 7 can be used to fix the gas delivery pipes 5 to one side of the valve body 1, facilitating the delivery of gas.

[0018] like Figure 6 , 7 As shown, the sealing mechanism 4 includes a third sealing plate 401 disposed inside the valve body 1. A support plate 402 is disposed on one side inside the valve body 1. The third sealing plate 401 has first insertion holes 404 on both sides. The support plate 402 has second insertion holes 405 on both sides. A connecting rod 403 is inserted into each second insertion hole 405. One end of the connecting rod 403 is threaded to the first insertion hole 404. Two insertion slots 408 are provided on both the third sealing plate 401 and the support plate 402. A limiting plate 406 is inserted into each insertion slot 408. The same spring 407 is fixed between the two limiting plates 406 located on the same side. The connecting rod 403 passes through the limiting plate 406. Two fourth sealing plates 411 are disposed inside the valve body 1. The two fourth sealing plates 411 are in contact with the third sealing plate 401. like Figure 6 , 7 As shown, a rotating shaft 412 is inserted inside the valve body 1. A fifth sealing plate 413 is fixedly installed on the outside of the rotating shaft 412. The top end of the rotating shaft 412 passes through the valve body 1 and extends out of the top of the valve body 1. The rotating shaft 412 is threadedly connected to the valve body 1. A handle 414 is fixedly installed on the top end of the rotating shaft 412. Fixing blocks 416 are fixedly installed on both sides inside the valve body 1. An installation rod 417 is fixedly installed on one side of the fixing block 416. Mounting holes 415 are opened on both sides of the fifth sealing plate 413. The installation rod 417 is inserted into the mounting holes 415. Second threaded holes 409 are opened on both sides of the limiting plate 406, the third sealing plate 401 and the support plate 402. The same second bolt 410 is threadedly connected inside the two connected second threaded holes 409. Gas enters the valve body 1 through the gas pipe 5. Turning the handle 414 causes the rotating shaft 412 to rotate, which in turn causes the fifth sealing plate 413 to rotate. Adjusting the rotation angle of the fifth sealing plate 413 controls the flow rate of the gas. The gas pushes the third sealing plate 401 to move, pushing the third sealing plate 401 away from the side of the fourth sealing plate 411. The gas can then enter another gas pipe 5 through the third sealing plate 401 for gas delivery. When the gas flows in reverse, it can push the third sealing plate 401 to move. The spring 407 on one side of the third sealing plate 401 can push the third sealing plate 401 to move according to its own elasticity, so that the third sealing plate 401 contacts the fourth sealing plate 411 to block it and prevent the gas from flowing in reverse. The mounting rod 417 on the fixing block 416 is inserted into the mounting hole 415 on the fifth sealing plate 413. The mounting hole 415 can limit the fifth sealing plate 413 to prevent it from rotating and to seal and block it.

[0019] like Figure 5 As shown, the disassembly mechanism 2 includes a first sealing plate 201 on the top of the valve body 1. The bottom of the first sealing plate 201 can be inserted into the through groove 3. The bottom of the valve body 1 is provided with a second sealing plate 202. Both sides of the first sealing plate 201 and the second sealing plate 202 are provided with connecting plates 203. The connecting plates 203 are provided with a plurality of first threaded holes 204. The two connected first threaded holes 204 are threaded with first bolts 205. Rotate the first bolt 205 to turn it out of the first threaded hole 204, pull the first sealing plate 201 to pull it out of the through groove 3, which will make it convenient for technicians to inspect and maintain the sealing mechanism 4 inside the valve body 1 and extend the service life of the valve body 1.

[0020] Rotate the second bolt 410 to unscrew it from the two second threaded holes 409. Then rotate the connecting rod 403 to unscrew it from the first insertion hole 404. Pull the connecting rod 403 to remove it from the third sealing plate 401 and the support plate 402. The spring 407 can then be removed from the valve body 1, making it easier to replace the spring 407 and avoiding affecting the movement of the third sealing plate 401.

[0021] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A double-seal check valve for gas pipelines, comprising a valve body (1), characterized in that: The valve body (1) is provided with a through groove (3), the valve body (1) is provided with a disassembly mechanism (2) for sealing the through groove (3), and the valve body (1) is provided with a sealing mechanism (4). The disassembly mechanism (2) includes a first sealing plate (201) on the top of the valve body (1). The bottom of the first sealing plate (201) can be inserted into the through groove (3). The bottom of the valve body (1) is provided with a second sealing plate (202). Both sides of the first sealing plate (201) and the second sealing plate (202) are provided with connecting plates (203). The connecting plates (203) are provided with a plurality of first threaded holes (204). The two connected first threaded holes (204) are threaded with first bolts (205).

2. A double-seal check valve for gas pipelines according to claim 1, characterized in that: The sealing mechanism (4) includes a third sealing plate (401) disposed inside the valve body (1). A support plate (402) is provided on one side inside the valve body (1). The third sealing plate (401) has first insertion holes (404) on both sides. The support plate (402) has second insertion holes (405) on both sides. A connecting rod (403) is inserted into each second insertion hole (405). One end of the connecting rod (403) is threaded to the first insertion hole (404). Two insertion slots (408) are provided on the three sealing plates (401) and the support plate (402). Each insertion slot (408) is fitted with a limiting plate (406). The same spring (407) is fixed between the two limiting plates (406) on the same side. The connecting rod (403) passes through the limiting plate (406). The valve body (1) is provided with two fourth sealing plates (411). The two fourth sealing plates (411) are in contact with the third sealing plate (401).

3. A double-seal check valve for gas pipelines according to claim 2, characterized in that: A rotating shaft (412) is inserted inside the valve body (1). A fifth sealing plate (413) is fixedly provided on the outside of the rotating shaft (412). The top end of the rotating shaft (412) passes through the valve body (1) and extends out of the top of the valve body (1). The rotating shaft (412) and the valve body (1) are threaded together. A handle (414) is fixedly provided on the top end of the rotating shaft (412). Fixing blocks (416) are fixedly provided on both sides inside the valve body (1). An installation rod (417) is fixedly provided on one side of the fixing block (416). An installation hole (415) is opened on both sides of the fifth sealing plate (413). The installation rod (417) is inserted into the installation hole (415).

4. A double-seal check valve for gas pipelines according to claim 2, characterized in that: The limiting plate (406), the third sealing plate (401) and the support plate (402) are all provided with second threaded holes (409) on both sides, and the two connected second threaded holes (409) are internally threaded with the same second bolt (410).

5. A double-seal check valve for gas pipelines according to claim 1, characterized in that: Gas pipes (5) are provided on both sides of the valve body (1).

6. A double-seal check valve for gas pipelines according to claim 5, characterized in that: Both the gas pipe (5) and the valve body (1) are provided with multiple third threaded holes (6), and the two connected third threaded holes (6) are internally threaded with the same third bolt (7).

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