Piston type composite sealing axial-flow check valve

Abstract

The invention relates to the field of check valves, in particular to a piston type composite sealing axial flow check valve which comprises a valve body, flanges are connected to the two sides of the valve body in a bolting mode, a splitter blade is connected to the left side of an inner cavity of the valve body in a bolting mode, a mounting cylinder is connected to the inner side of the splitter blade in a bolting mode, and a first mounting groove is formed in the middle of an inner cavity of the mounting cylinder. The first mounting groove is provided with a second mounting groove, and the inner side of the second mounting groove is bolted with a first spring. According to the valve, the flow velocity threshold value of fluid pushing away the valve clack is controlled by controlling the elastic force of the second spring through the flow dividing blade, the mounting barrel, the first mounting groove, the second mounting groove, the first spring, the sliding shaft and other assemblies, and meanwhile the second spring can gradually reduce the flow velocity of the fluid when the valve body is closed; and therefore, the valve clack is reversely pushed according to the elastic force of the second spring, the valve clack is gradually closed, and the water hammer phenomenon in the valve body is avoided.

Description

Technical Field

[0001] The invention relates to the field of check valves, and in particular to a piston type composite sealing axial flow check valve. Background Art

[0002] Axial flow check valve is also called cross-flow check valve. Check valve refers to a valve that automatically opens and closes the valve disc by the flow of the medium itself to prevent the medium from flowing back. It can be called a one-way valve, a reverse flow valve, a check valve and a back pressure valve. The cross-flow check valve adopts a special sealing structure. Regardless of the pressure behind the valve, the valve is tightly closed and has good sealing performance. It overcomes the disadvantage of poor sealing performance of general check valves at low back pressure.

[0003] However, the existing check valves still have certain defects. For example, when the medium passes through, the guide body is prone to swing, and then hit the inner wall of the valve body, causing wear and abnormal noise. Secondly, when the guide body returns, the left end of the guide body hits the valve body, thereby generating noise.

[0004] Therefore, it is necessary to invent a piston type composite seal axial flow check valve to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a piston-type composite seal axial flow check valve which can effectively solve the above technical problems.

[0006] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a piston-type composite seal axial flow check valve, comprising a valve body, flanges are bolted on both sides of the valve body, a diverter leaf is bolted on the left side of the inner cavity of the valve body, a mounting tube is bolted on the inner side of the diverter leaf, a first mounting groove is opened in the middle of the inner cavity of the mounting tube, a second mounting groove is opened in the first mounting groove, a first spring is bolted on the inner side of the second mounting groove, a sliding shaft is bolted on the other end of the first spring, a support frame is bolted on the right side of the inner cavity of the valve body, a shaft rod is sleeved on the inner side of the support frame, a connecting piece is bolted on the left side of the shaft rod, a valve disc is bolted on the outer side of the connecting piece, a first sealing sleeve is bolted on the center of the inner side of the valve disc, a second sealing sleeve is bolted on the inner side of the second mounting groove, and the inner sides of the first sealing sleeve and the second sealing sleeve are both slidably sleeved with the surface of the sliding shaft.

[0007] Preferably, a connecting groove is provided in the middle of the valve flap, and a second spring is bolted to the inner side of the connecting groove, so that the valve flap can fix the second spring at one end through the connecting groove, so that the second spring can buffer the horizontal movement of the valve flap.

[0008] Preferably, threaded rods are threadedly connected on both sides of the inner cavity of the installation tube, and the right side of the threaded rod is rotatably connected to a spring connecting seat through a bearing. The inner side of the spring connecting seat is bolted to the other end of the second spring. The threaded rod can drive the spring connecting seat to move horizontally in the inner cavity of the installation tube during rotation, thereby controlling the tensioning force of the second spring, and then controlling the value of the impact force of the water flow on the valve flap before it opens.

[0009] Preferably, drainage holes are arranged around the installation tube, and water inside the installation tube can be discharged to the outside through the drainage holes.

[0010] Preferably, a sealing ring is provided on the right side of the inner cavity of the valve body, and the inner side of the sealing ring is slidably plugged into the surface of the valve disc, and the sealing ring and the valve disc are plugged into each other, so that a sealing and closed-flow effect is generated at one end of the valve body.

[0011] Preferably, a sealing ring fixing piece is bolted to the right side of the inner cavity of the valve body, and the left side of the sealing ring fixing piece is clamped with the surface of the sealing ring, so that the sealing ring is effectively fixed in the inner cavity of the valve body, thereby improving the sealing tightness of the sealing ring.

[0012] Preferably, a mounting grid is bolted to the middle of the inner cavity of the valve body, and a slide rod is bolted to the right side of the mounting grid. The slide rod is fixed in the valve body through the mounting grid, and a through groove is provided on the inner side of the mounting grid so that water can flow smoothly through.

[0013] Preferably, the upper and lower parts of the left side of the valve flap are bolted with folding rods, and the inner side of the folding rod is slidably connected to the surface of the slide rod, so that the valve flap can move horizontally following the path of the slide rod under the guidance of the folding rod and the slide rod.

[0014] Preferably, the other end of the threaded rod is bolted with an adjusting nut, so that the user can control the rotation of the threaded rod connected thereto by adjusting the nut.

[0015] In the above technical solution, the technical effects and advantages provided by the present invention are: In the present invention, by means of components such as the diverter blade, the mounting cylinder, the first mounting groove, the second mounting groove, the first spring, and the sliding shaft, the flow rate threshold of the fluid pushing the valve flap is controlled by controlling the elastic force of the second spring. At the same time, when the valve body is closed, the second spring can gradually reduce the fluid flow rate, thereby pushing the valve flap back according to the elastic force of the second spring itself, so that the valve flap is gradually closed, thereby avoiding water hammer phenomenon inside the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a front view of the overall structure of the present invention; Figure 2 It is a schematic diagram of the valve flap opening structure of the present invention; Figure 3 It is a schematic diagram of the valve flap closing structure of the present invention; Figure 4 For the present invention Figure 2 A magnified view of the structure at center; Figure 5 For the present invention Figure 3 A magnified view of the structure at B in the middle; Figure 6 For the present invention Figure 3 Enlarged view of the structure at point C in the middle.

[0018] Description of reference numerals: 1. Valve body; 2. Flange; 3. Diverter blade; 4. Mounting cylinder; 5. First mounting groove; 6. Second mounting groove; 7. First spring; 8. Sliding shaft; 9. Support frame; 10. Shaft rod; 11. Connecting piece; 12. Valve disc; 13. First sealing sleeve; 14. Second sealing sleeve; 15. Connecting groove; 16. Second spring; 17. Threaded rod; 18. Spring connecting seat; 19. Drain hole; 20. Sealing ring; 21. Sealing ring fixing piece; 22. Mounting grid; 23. Sliding rod; 24. Folding rod; 25. Adjusting nut. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] The present invention provides Figure 1-6A piston-type composite seal axial flow check valve shown in the figure comprises a valve body 1, flanges 2 are bolted on both sides of the valve body 1, a diverter leaf 3 is bolted on the left side of the inner cavity of the valve body 1, a mounting tube 4 is bolted on the inner side of the diverter leaf 3, a first mounting groove 5 is opened in the middle of the inner cavity of the mounting tube 4, a second mounting groove 6 is opened in the first mounting groove 5, a first spring 7 is bolted on the inner side of the second mounting groove 6, a sliding shaft 8 is bolted on the other end of the first spring 7, a support frame 9 is bolted on the right side of the inner cavity of the valve body 1, a shaft rod 10 is sleeved on the inner side of the support frame 9, a connecting piece 11 is bolted on the left side of the shaft rod 10, a valve disc 12 is bolted on the outer side of the connecting piece 11, a first sealing sleeve 13 is bolted on the center of the inner side of the valve disc 12, a second sealing sleeve 14 is bolted on the inner side of the second mounting groove 6, and the inner sides of the first sealing sleeve 13 and the second sealing sleeve 14 are both slidably sleeved with the surface of the sliding shaft 8.

[0021] A connecting groove 15 is provided in the middle of the valve flap 12 , and a second spring 16 is bolted inside the connecting groove 15 , so that the valve flap 12 can fix the second spring 16 at one end through the connecting groove 15 , so that the second spring 16 can buffer the horizontal movement of the valve flap 12 .

[0022] Threaded rods 17 are threadedly connected to both sides of the inner cavity of the installation tube 4, and the right side of the threaded rod 17 is rotatably connected to a spring connecting seat 18 through a bearing. The inner side of the spring connecting seat 18 is bolted to the other end of the second spring 16. The threaded rod 17 can drive the spring connecting seat 18 to move horizontally in the inner cavity of the installation tube 4 during rotation, thereby controlling the tensioning force of the second spring 16, and further controlling the value of the impact force of the water flow on the valve flap 12 before it opens.

[0023] Drain holes 19 are arranged around the installation tube 4 , and water inside the installation tube 4 can be discharged to the outside through the drainage holes 19 .

[0024] A sealing ring 20 is provided on the right side of the inner cavity of the valve body 1, and the inner side of the sealing ring 20 is slidably plugged into the surface of the valve disc 12, and the sealing ring 20 and the valve disc 12 are plugged into each other, so that a sealing and closed flow effect is generated at one end of the valve body 1.

[0025] A sealing ring fixing part 21 is bolted to the right side of the inner cavity of the valve body 1, and the left side of the sealing ring fixing part 21 is clamped with the surface of the sealing ring 20, so that the sealing ring 20 is effectively fixed in the inner cavity of the valve body 1, thereby improving the sealing tightness of the sealing ring 20.

[0026] A mounting grid plate 22 is bolted to the middle of the inner cavity of the valve body 1, and a slide bar 23 is bolted to the right side of the mounting grid plate 22. The slide bar 23 is fixed in the valve body 1 through the mounting grid plate 22, and a through groove is provided on the inner side of the mounting grid plate 22, so that water can flow smoothly through.

[0027] The upper and lower parts of the left side of the valve flap 12 are bolted with folding rods 24, and the inner side of the folding rod 24 is slidably connected to the surface of the slide rod 23, so that the valve flap 12 can move horizontally following the path of the slide rod 23 under the guidance of the folding rod 24 and the slide rod 23.

[0028] The other end of the threaded rod 17 is bolted with an adjusting nut 25 , so that the user can control the rotation of the threaded rod 17 connected thereto by adjusting the nut 25 .

[0029] Refer to the instruction manual Figure 1-6 Working principle: In the present invention, through the components such as the diverter blade 3, the mounting tube 4, the first mounting groove 5, the second mounting groove 6, the first spring 7, and the sliding shaft 8, when the fluid enters from the right side of the valve body 1, the valve disc 12 is opened according to the flow rate of the fluid. The valve disc 12 will synchronously squeeze the first spring 7 and the second spring 16 during the movement. The first spring 7 has a relatively small elastic force and is mainly used as a buffer component for the valve disc 12 to move back and forth slightly when being pushed by the water flow, thereby reducing the wear of the connecting components caused by the long-term reciprocating movement of the valve disc 12, which affects normal use. The second spring 16 is mainly used as an opening and closing control component of the valve disc 12. The corresponding second spring 16 is used according to the general flow rate of the fluid in actual use. By controlling the elastic force of the second spring 16, the flow rate threshold of the fluid pushing the valve disc 12 is controlled. At the same time, the second spring 16 can gradually reduce the fluid flow rate when the valve body 1 is closed, thereby pushing the valve disc 12 back according to the elastic force of the second spring 16 itself, so that the valve disc 12 is gradually closed, thereby avoiding the water hammer phenomenon inside the valve body 1.

[0030] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and should not be understood as limitations on the present invention.

Claims

1. A piston-type composite seal axial flow check valve, comprising a valve body (1), characterized in that: Flanges (2) are bolted to both sides of the valve body (1); a diverter blade (3) is bolted to the left side of the inner cavity of the valve body (1); a mounting tube (4) is bolted to the inner side of the diverter blade (3); a first mounting groove (5) is provided in the middle of the inner cavity of the mounting tube (4); a second mounting groove (6) is provided in the first mounting groove (5); a first spring (7) is bolted to the inner side of the second mounting groove (6); a sliding shaft (8) is bolted to the other end of the first spring (7); A support frame (9) is bolted on the right side, a shaft (10) is sleeved on the inner side of the support frame (9), a connecting piece (11) is bolted on the left side of the shaft (10), a valve flap (12) is bolted on the outer side of the connecting piece (11), a first sealing sleeve (13) is bolted on the center of the inner side of the valve flap (12), a second sealing sleeve (14) is bolted on the inner side of the second mounting groove (6), and the inner sides of the first sealing sleeve (13) and the second sealing sleeve (14) are both slidably sleeved on the surface of the sliding shaft (8).

2. A piston type composite seal axial flow check valve according to claim 1, characterized in that: A connecting groove (15) is provided in the middle of the valve flap (12), and a second spring (16) is bolted to the inner side of the connecting groove (15).

3. A piston type composite seal axial flow check valve according to claim 2, characterized in that: Threaded rods (17) are threadedly connected to both sides of the inner cavity of the installation cylinder (4); the right side of the threaded rod (17) is rotatably connected to a spring connection seat (18) via a bearing; the inner side of the spring connection seat (18) is bolted to the other end of the second spring (16).

4. The piston-type composite seal axial flow check valve according to claim 1, characterized in that: Drainage holes (19) are arranged around the four sides of the installation cylinder (4).

5. The piston-type composite seal axial flow check valve according to claim 1, characterized in that: A sealing ring (20) is provided on the right side of the inner cavity of the valve body (1), and the inner side of the sealing ring (20) is slidably plugged into the surface of the valve flap (12).

6. The piston-type composite seal axial flow check valve according to claim 5, characterized in that: A sealing ring fixing piece (21) is bolted to the right side of the inner cavity of the valve body (1), and the left side of the sealing ring fixing piece (21) is clamped to the surface of the sealing ring (20).

7. The piston-type composite seal axial flow check valve according to claim 1, characterized in that: A mounting grid plate (22) is bolted to the middle of the inner cavity of the valve body (1), and a sliding rod (23) is bolted to the right side of the mounting grid plate (22).

8. The piston-type composite seal axial flow check valve according to claim 7, characterized in that: The upper and lower parts of the left side of the valve flap (12) are both bolted with folding rods (24), and the inner side of the folding rod (24) is slidably connected to the surface of the sliding rod (23).

9. The piston-type composite seal axial flow check valve according to claim 3, characterized in that: The other end of the threaded rod (17) is bolted with an adjusting nut (25).

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