Gas pipeline check valve

Abstract

The utility model discloses a gas pipeline check valve which comprises a valve body, a gas inlet pipe is arranged on one side of the valve body, a gas outlet pipe is arranged on the other side of the valve body, two sets of installation grooves are formed in the inner wall of the valve body, connecting columns are rotationally installed in the two sets of installation grooves, one side of each connecting column is fixedly connected with a valve clack, and the other side of each connecting column is fixedly connected with a valve rod. The two ends of the connecting column are fixedly connected with rotating shafts, the rotating shafts are sleeved with torsional springs, and the torsional springs are arranged in the mounting grooves. According to the check valve, the valve clacks are matched with the torsional spring, after gas input is stopped, the twisted torsional spring automatically enables the two valve clacks to rotate reversely to be closed, gas backflow in a pipeline system is avoided, manual operation of the check valve is not needed, input of manpower resources is avoided, manpower cost is greatly reduced, fatigue or negligence during manual operation is avoided, and the safety of the check valve is improved. And the continuity and the stability of a gas pipeline system are ensured.

Description

Technical Field

[0001] The utility model relates to the field of gas pipeline equipment, in particular to a gas pipeline check valve. Background Art

[0002] The gas pipeline check valve is an automatic valve widely used in gas pipeline systems. Its main function is to prevent the backflow of gas medium.

[0003] In order to further understand the gas pipeline check valve in the prior art, after searching, the Chinese patent with the announcement number: CN213206577U discloses a laboratory gas pipeline check valve, including a valve body and a flange, flanges are provided at both ends of the valve body, an air inlet is provided on the left side of the valve body, an air outlet is provided on the right side of the valve body, a valve disc is provided on the side of the valve body close to the air outlet, the upper end of the valve disc is rotatably connected to the valve body through a movable seat, a slide rail is provided on the left side of the valve disc, a slider is slidably connected in the slide rail, and a movable seat 2 is installed on the other end of the slider, and a movable seat 2 is installed on the movable seat 2. The cam is fixedly mounted on a support frame, and the cam is secured to the support frame by means of a pin. The cam is secured to the support frame by means of a pin. The cam is secured to the support frame by means of a pin. The cam is secured to the support frame by means of a pin.

[0004] After exploration and analysis, the following shortcomings exist in the actual use of this patent: manual operation is required to rotate the handwheel to drive the adjusting screw to rotate, and the conical head, wedge block movable rod and spring are used to drive the valve disc to move to open and close the valve disc. Manual operation of the check valve not only increases the investment of human resources, but also the manual operation is easily affected by fatigue or negligence, making it difficult to ensure the continuity and stability of the gas pipeline system. Utility Model Content

[0005] Aiming at the technical problems that the existing manually operated check valve not only increases the input of human resources, but also the manual operation is easily affected by fatigue or negligence, making it difficult to ensure the continuity and stability of the gas pipeline system, the utility model provides a gas pipeline check valve.

[0006] The technical solution adopted by the present invention is: it includes a valve body, an air inlet pipe is provided on one side of the valve body, an air outlet pipe is provided on the other side of the valve body, two groups of mounting grooves are opened on the inner wall of the valve body, connecting columns are rotatably installed in the two groups of mounting grooves, a valve flap is fixedly connected to one side of the connecting column, and both ends of the connecting column are fixedly connected to a rotating shaft, a torsion spring is provided on the outside of the rotating shaft, and the torsion spring is arranged in the mounting groove.

[0007] Furthermore, a sealing ring is provided on one side of the valve disc, and the sealing ring is fixedly mounted on the inner wall of the valve body.

[0008] By adopting the above technical solution, the sealing performance of the valve disc when it is closed is improved.

[0009] Furthermore, two groups of mounting blocks are fixedly installed on the circumferential surface of the valve body, and two groups of mounting blocks are provided with two groups of sliding grooves. A fixing rod is slidably installed in the sliding groove, and a socket is provided at one end of the fixing rod, and the socket is adapted to the rotating shaft.

[0010] By adopting the above technical solution, the torsion spring can be easily replaced after long-term use.

[0011] Furthermore, a fixing hole is provided on the fixing rod, a fixing screw is threadedly connected to the mounting block, and the fixing screw is adapted to the fixing hole.

[0012] By adopting the above technical solution, the stability of the check valve during use is improved.

[0013] Furthermore, both ends of the connecting column are provided with limiting holes, and one end of the fixing rod is also provided with a limiting hole, and both ends of the torsion spring are adapted to the limiting holes.

[0014] By adopting the above technical solution, the stability of the torsion spring during use is improved.

[0015] Furthermore, connecting flanges are fixedly installed at both ends of the valve body, and one end of the air inlet pipe and the air outlet pipe is fixedly connected to the connecting flanges. The connecting flanges are provided with mounting holes, and connecting bolts are provided in the mounting holes.

[0016] By adopting the above technical solution, the installation and disassembly of the valve body are facilitated, and the practicality of the valve body is improved.

[0017] The beneficial effects of the utility model are as follows: the valve body cooperates with the connecting column, the valve disc, the rotating shaft, the fixing rod and the torsion spring, the gas in the pipeline system enters the valve body through the air inlet pipe, the high-pressure gas pushes the two sets of valve discs to rotate, the two sets of valve discs open to open the channel inside the valve body, the gas enters the air outlet pipe through the valve body and is input into the gas pipeline system; when the gas delivery in the air inlet pipe stops, the twisted torsion spring drives the valve disc to reverse to the initial position, the two sets of valve discs close to close the channel inside the valve body, and the gas in the air outlet pipe is prevented from flowing back into the air inlet pipe, and there is no need to manually operate the check valve, which avoids the investment of human resources and greatly reduces the labor cost. At the same time, it avoids fatigue or negligence during manual operation, and ensures the continuity and stability of the gas pipeline system;

[0018] By coordinating the two ends of the torsion spring with the limiting holes provided on the connecting column and the fixing rod, the torsion spring is fixed between the fixing rod and the connecting column to ensure the normal use of the torsion spring. By coordinating the fixing rod with the fixing screw, the torsion spring can be easily replaced, avoiding the torsion spring from becoming less in torque after long-term use, resulting in the two sets of valve discs not closing tightly, affecting the effect of the valve disc in preventing gas backflow, and improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a schematic structural diagram of the valve body in the utility model;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the valve body in the present utility model;

[0022] Figure 4 This is another cross-sectional structural diagram of the valve body in the present utility model;

[0023] Figure 5 For the utility model Figure 4 A magnified view of point A;

[0024] Figure 6 This is a structural diagram of the mounting block and valve disc in the present utility model;

[0025] Figure 7 This is a schematic diagram of the assembly of the valve disc in the present utility model.

[0026] The numbers in the figure are: 1. Valve body; 2. Air inlet pipe; 3. Air outlet pipe; 4. Mounting groove; 5. Connecting column; 6. Valve disc; 7. Sealing ring; 8. Rotating shaft; 9. Torsion spring; 10. Mounting block; 11. Slide groove; 12. Fixing rod; 13. Fixing hole; 14. Fixing screw; 15. Socket; 16. Limiting hole; 17. Connecting flange; 18. Mounting hole; 19. Connecting bolt. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0028] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0029] The following is combined with Figure 1-7 The utility model is further described.

[0030] In order to solve the problems existing in the background technology, the present application proposes the following technical solution: it includes a valve body 1, an air inlet pipe 2 is provided on one side of the valve body 1, and an air outlet pipe 3 is provided on the other side of the valve body 1, two groups of mounting grooves 4 are opened on the inner wall of the valve body 1, and connecting columns 5 are rotatably installed in both groups of mounting grooves 4, a valve flap 6 is fixedly connected to one side of the connecting column 5, and both ends of the connecting column 5 are fixedly connected to a rotating shaft 8, and a torsion spring 9 is provided on the outside of the rotating shaft 8, and the torsion spring 9 is arranged in the mounting groove 4.

[0031] The air inlet pipe 2 and the air outlet pipe 3 are connected to the two ends of the valve body 1 respectively. The gas in the pipeline system enters the valve body 1 through the air inlet pipe 2. The high-pressure gas pushes the two sets of valve flaps 6 to rotate. The two sets of valve flaps 6 open to open the channel inside the valve body 1. The gas enters the air outlet pipe 3 through the valve body 1 and is input into the gas pipeline system. The two sets of valve flaps 6 rotate and drive the torsion spring 9 to twist. When the gas pressure in the pipeline system decreases, the thrust on the two sets of valve flaps 6 becomes smaller. The twisted torsion spring 9 drives the valve flap 6 to reverse to restore the initial state, so that the valve body 1 becomes smaller. When the gas is stopped from being transported in the intake pipe 2, the twisted torsion spring 9 drives the valve flap 6 to reverse to the initial position. The two sets of valve flaps 6 are closed to close the channel inside the valve body 1, preventing the gas in the outlet pipe 3 from flowing back into the intake pipe 2. The automatic opening or closing of the valve flap 6 is achieved by the setting of the torsion spring 9. There is no need for manual operation of the check valve, which avoids the investment of human resources and greatly reduces the labor cost. At the same time, it avoids fatigue or negligence during manual operation, and ensures the continuity and stability of the gas pipeline system.

[0032] It is further explained that a sealing ring 7 is provided on one side of the valve disc 6 , and the sealing ring 7 is fixedly mounted on the inner wall of the valve body 1 .

[0033] The sealing ring 7 can limit the rotation of the valve flap 6 so that the valve flap 6 can only rotate toward the outlet pipe 3, thereby improving the stability of the two sets of valve flaps 6 when closed and ensuring the effect of preventing gas backflow. At the same time, the sealing ring 7 cooperates with the valve flap 6 to improve the sealing performance of the valve body 1.

[0034] It is further explained that two groups of mounting blocks 10 are fixedly installed on the circumferential surface of the valve body 1, and two groups of sliding grooves 11 are provided on the two groups of mounting blocks 10. A fixing rod 12 is slidably installed in the sliding groove 11, and a socket 15 is provided at one end of the fixing rod 12, which is adapted to the rotating shaft 8.

[0035] After the fixing rod 12 is inserted into the slide groove 11, one end of the rotating shaft 8 is located in the socket 15, and the torsion spring 9 is located between the connecting column 5 and the fixing rod 12. The connecting column 5 and the valve disc 6 are installed in the mounting groove 4 through two sets of fixing rods 12 and the mounting block 10. After long-term use, the torsion spring 9 will cause the torsion spring 9 to deform, lose its original elasticity, and cause the torsion force to decrease, so that the two sets of valve discs 6 are not closed tightly and cannot completely prevent the gas backflow, so that the torsion spring 9 needs to be replaced. After pulling out a set of fixing rods 12 from the slide groove 11, the torsion spring 9 sleeved on the outside of the rotating shaft 8 is removed and replaced to ensure the normal use of the valve body 1 and improve the practicality of the check valve.

[0036] It is further explained that a fixing hole 13 is formed on the fixing rod 12 , and a fixing screw 14 is threadedly connected to the mounting block 10 , and the fixing screw 14 is adapted to the fixing hole 13 .

[0037] After the fixing rod 12 is inserted into the slide groove 11, the fixing screw 14 is screwed into the fixing hole 13, thereby fixing the fixing rod 12 in the slide groove 11. After the two sets of fixing rods 12 are fixed on the mounting block 10, the connecting column 5 is rotated and installed between the two sets of fixing rods 12. The two sets of fixing rods 12 provide installation conditions for the connecting column 5. The fixing holes 13 cooperate with the fixing screw 14 to improve the stability of the connecting column 5 during installation, thereby ensuring the normal use of the valve disc 6. When the torsion spring 9 needs to be replaced, the fixing screw 14 is unscrewed from the fixing hole 13 to release the fixation of the fixing rod 12, so that the fixing rod 12 can be taken out of the slide groove 11, which is convenient for replacing the torsion spring 9.

[0038] It is further explained that both ends of the connecting column 5 are provided with a limiting hole 16 , and one end of the fixing rod 12 is also provided with a limiting hole 16 , and both ends of the torsion spring 9 are adapted to the limiting holes 16 .

[0039] After the two sets of fixing rods 12 are fixed in the slide groove 11, one end of the torsion spring 9 is inserted into the limiting hole 16 at one end of the fixing rod 12, and the other end of the torsion spring 9 is inserted into the limiting hole 16 at one end of the connecting column 5. The limiting hole 16 limits one end of the torsion spring 9, thereby fixing the torsion spring 9 between the fixing rod 12 and the connecting column 5, thereby ensuring that when the gas pushes the valve flap 6 to rotate, the valve flap 6 can twist the torsion spring 9, so that the torsion spring 9 plays its role, thereby improving the stability of the device.

[0040] It is further explained that connecting flanges 17 are fixedly installed at both ends of the valve body 1, and one end of the air inlet pipe 2 and the air outlet pipe 3 is fixedly connected to the connecting flange 17. The connecting flange 17 is provided with a mounting hole 18, and a connecting bolt 19 is provided in the mounting hole 18.

[0041] After the connecting flanges 17 at one end of the air inlet pipe 2 and the air outlet pipe 3 are aligned with the connecting flanges 17 at both ends of the valve body 1, the air inlet pipe 2 and the air outlet pipe 3 are connected to the two ends of the valve body 1 by passing the connecting bolts 19 through the mounting holes 18 and cooperating with the nuts. The connecting bolts 19 and the connecting flanges 17 facilitate the installation and disassembly of the valve body 1, thereby improving the practicality of the valve body 1.

[0042] Specific reference is made to the following operation: connect the air inlet pipe 2 and the air outlet pipe 3 to the two ends of the valve body 1 respectively through the connecting flange 17 and the connecting bolts 19. The gas in the pipeline system enters the valve body 1 through the air inlet pipe 2. The high-pressure gas pushes the two sets of valve flaps 6 to rotate. The two sets of valve flaps 6 open to open the passage inside the valve body 1. The gas enters the air outlet pipe 3 through the valve body 1 and is input into the gas pipeline system. The two sets of valve flaps 6 rotate and drive the torsion spring 9 to twist. When the gas supply in the air inlet pipe 2 stops, the twisted torsion spring 9 drives the valve flap 6 to reverse to the initial position. The two sets of valve flaps 6 close to close the passage inside the valve body 1, preventing the gas in the outlet pipe 3 from flowing back into the air inlet pipe 2.

[0043] After the torsion force of the torsion spring 9 becomes smaller after long-term use, the fixing screw 14 is unscrewed from the fixing hole 13, and then a set of fixing rods 12 are pulled out from the slide groove 11, and then the corresponding torsion spring 9 sleeved on the outside of the rotating shaft 8 is removed and replaced. After replacing the new torsion spring 9, the fixing rod 12 is inserted into the slide groove 11, so that the two ends of the torsion spring 9 are inserted into the fixing rod 12 and the limiting holes 16 on the connecting column 5, and the fixing screw 14 is screwed into the fixing hole 13, so that the fixing rod 12 is fixed in the slide groove 11.

[0044] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology. It will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0045] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A gas pipeline check valve, characterized in that: The invention comprises a valve body (1), wherein an air inlet pipe (2) is provided on one side of the valve body (1), and an air outlet pipe (3) is provided on the other side of the valve body (1); two groups of mounting grooves (4) are provided on the inner wall of the valve body (1); connecting columns (5) are rotatably installed in both groups of the mounting grooves (4); a valve flap (6) is fixedly connected to one side of the connecting column (5); both ends of the connecting column (5) are fixedly connected to a rotating shaft (8); a torsion spring (9) is provided on the outside of the rotating shaft (8); and the torsion spring (9) is arranged in the mounting groove (4).

2. A gas pipeline check valve according to claim 1, characterized in that: A sealing ring (7) is provided on one side of the valve flap (6), and the sealing ring (7) is fixedly mounted on the inner wall of the valve body (1).

3. A gas pipeline check valve according to claim 2, characterized in that: Two groups of mounting blocks (10) are fixedly mounted on the circumferential surface of the valve body (1), and two groups of sliding grooves (11) are provided on the two groups of mounting blocks (10). A fixing rod (12) is slidably mounted in the sliding groove (11), and a socket (15) is provided at one end of the fixing rod (12), and the socket (15) is adapted to the rotating shaft (8).

4. A gas pipeline check valve according to claim 3, characterized in that: A fixing hole (13) is provided on the fixing rod (12), and a fixing screw (14) is threadedly connected to the mounting block (10), and the fixing screw (14) is adapted to the fixing hole (13).

5. A gas pipeline check valve according to claim 4, characterized in that: Both ends of the connecting column (5) are provided with a limiting hole (16), one end of the fixing rod (12) is also provided with a limiting hole (16), and both ends of the torsion spring (9) are adapted to the limiting holes (16).

6. A gas pipeline check valve according to claim 5, characterized in that: Both ends of the valve body (1) are fixedly mounted with connecting flanges (17), one end of the air inlet pipe (2) and the air outlet pipe (3) are fixedly connected with the connecting flanges (17), a mounting hole (18) is provided on the connecting flange (17), and a connecting bolt (19) is provided in the mounting hole (18).

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