Comprehensive slow-closing check valve

Abstract

The comprehensive slowly-closed check valve comprises a valve body, a slowly-closed valve piece and a first annular baffle are installed at the liquid outlet end of the valve body, and a closed valve piece and a second annular baffle are installed at the liquid inlet end of the valve body; the slowly-closed valve piece comprises a first supporting piece and a pressure reducing valve clack, and the pressure reducing valve clack faces the side of the liquid inlet end. The pressure reducing valve clack is arranged on the first supporting piece in a penetrating mode and can slide along the first supporting piece. A slow closing structure is arranged on the periphery of the pressure reducing valve clack, and when the pressure reducing valve clack is attached to the first annular baffle, a flowing channel for liquid circulation is formed between the slow closing structure and the first annular baffle. The closed valve piece comprises a second supporting piece and a closed valve clack, and the closed valve clack faces the side of the liquid inlet end. The closed valve clack is arranged on the second supporting piece in a penetrating mode and can slide along the second supporting piece. The pressure reducing valve clack and the closed valve clack are far away from or attached to the second annular baffle along with liquid flowing. According to the check valve, two-stage valve parts are matched, the slow closing function and the non-return sealing closing function can be achieved, the water hammer effect is eliminated, and damage to equipment is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of check valves, and in particular to a comprehensive slow-closing check valve. Background Art

[0002] Existing check valves are used to control the one-way flow of pipeline media to prevent the media from flowing back. When the media flows back, the valve disc closes quickly due to the pressure of the media, which impacts the valve seat and easily causes water hammer, causing damage to the equipment. Existing check valves have a single function, such as thin plate butterfly check valves, which have poor sealing performance, and slow-closing check valves are prone to water hammer effects. Summary of the invention

[0003] The object of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a comprehensive slow-closing check valve.

[0004] The present invention is realized through the following technical scheme: a comprehensive slow-closing check valve, comprising a valve body; a slow-closing valve member and a first annular baffle are installed at the liquid outlet end of the valve body, and a closed valve member and a second annular baffle are installed at the liquid inlet end of the valve body; the slow-closing valve member comprises a pressure-reducing valve flap and a first support member, the pressure-reducing valve flap faces the liquid inlet side, and the first support member faces the liquid outlet side; a first positioning column is installed on the bottom side of the pressure-reducing valve flap, the first positioning column is penetrated on the first support member and can slide along it, the pressure-reducing valve flap moves away from the first annular baffle as the liquid flows forward, and the pressure-reducing valve flap adheres to the first annular baffle as the liquid flows backward; the outer peripheral edge of the pressure-reducing valve flap is close to the valve There is a gap between the inner walls of the body, and a slow-closing structure is provided around the pressure-reducing valve flap. When the pressure-reducing valve flap is in contact with the first annular baffle, a flow channel for liquid circulation is formed between the slow-closing structure and the first annular baffle. The closed valve component includes a closed valve flap and a second support component, the closed valve flap faces the liquid inlet side, and the second support component faces the liquid outlet side. A second positioning column is installed on the bottom side of the closed valve flap, and the second positioning column is penetrated by the second support component and can slide along it. The closed valve flap moves away from the second annular baffle as the liquid flows forward, and the closed valve flap is in contact with the second annular baffle as the liquid flows back. There is a gap between the outer peripheral edge of the closed valve flap and the inner wall of the valve body.

[0005] The setting of the slow-closing valve member forms a flow channel with the first annular baffle, which has a gap to achieve incomplete sealing closure, which can prevent the valve disc from closing quickly and causing water hammer effect, and realize the slow-closing function; the slow-closing valve member is combined with the first annular baffle to form a first-stage valve, and the closed valve member is combined with the second annular baffle to form a second-stage valve. The cooperation of the two-stage valve can achieve slow closing and non-return sealing closing functions to avoid water hammer effect. The gap between the valve disc and the inner wall of the valve body forms a channel for liquid flow. The cooperation between the support member and the positioning column allows the valve disc to move along the support member.

[0006] The second annular baffle is provided with a sealing gasket, and when the closed valve flap is attached to the second annular baffle, the sealing gasket is clamped between the closed valve flap and the second annular baffle. The arrangement of the sealing gasket enables the closed valve flap to be sealed and attached to the second annular baffle, thereby stopping the phenomenon of liquid backflow.

[0007] The slow-closing structure is a wave-shaped plate, and a groove formed by the wave-shaped plate connects the space under the pressure-reducing valve flap with the space outside the pressure-reducing valve flap.

[0008] The first support member includes a first support frame and a first positioning ring. The first support frame is fixed to the inner wall of the valve body, and the first positioning ring is arranged on the first support frame. The first positioning column is sleeved in the first positioning ring and can slide up and down along the first positioning ring. The first support frame is used to support the pressure reducing valve disc, and the first positioning ring can restrict the range of movement of the first positioning column.

[0009] The slow-closing valve element further comprises a first spring, which is sleeved on the outer periphery of the first positioning column, with one end of the first spring pressing against the pressure reducing valve flap and the other end pressing against the first support frame. The first spring is arranged so that the pressure reducing valve flap always tends to press against the first annular baffle, and can be checked in time.

[0010] The first support frame includes three evenly distributed first support legs, one end of the first support leg is fixed to the inner wall surface of the valve body, and the other end of the first support leg is fixed to the first positioning ring.

[0011] The second support member includes a second support frame and a second positioning ring. The second support frame is fixed on the inner wall surface of the valve body, and the second positioning ring is arranged on the second support frame. The second positioning column is sleeved in the second positioning ring and can slide up and down along the second positioning ring.

[0012] The closed valve component also includes a second spring, which is sleeved on the outer circumference of the second positioning column, with one end of the second spring pressing against the closed valve disc and the other end of the second spring pressing against the second support frame.

[0013] The second support frame includes three evenly distributed second support legs, one end of the second support leg is fixed to the inner wall surface of the valve body, and the other end of the second support leg is fixed to the second positioning ring.

[0014] Two ends of the first supporting foot are located at different heights.

[0015] Compared with the prior art, the advantages of the present invention are: the check valve has a simple structure and a good slow closing effect. The cooperation of two-stage valve components can realize the slow closing and check sealing closing functions, prevent water backflow, eliminate the water hammer effect, and effectively reduce the damage to the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0017] Figure 2 This is a schematic structural diagram of a pressure reducing valve flap according to an embodiment of the present invention;

[0018] Figure 3 A top view of a support member according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of Example 2 of the present invention in a state of normal liquid flow;

[0020] Figure 5 This is a schematic diagram of the structure of Example 2 of the present invention in the liquid backflow state.

[0021] The meanings of the reference numerals in the figure are as follows: 1. valve body; 2. first annular baffle; 3. pressure reducing valve disc; 31. first positioning column; 32. slow closing structure; 33. first spring; 4. first support member; 5. sealed valve disc; 51. second positioning column; 52. second spring; 6. second support member; 7. second annular baffle; 8. sealing gasket. DETAILED DESCRIPTION

[0022] The content of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] Example 1

[0024] See also Figures 1 to 3, is a comprehensive slow-closing check valve, comprising a valve body 1; a slow-closing valve member and a first annular baffle 2 are installed at the liquid outlet end of the valve body 1, and a closed valve member and a second annular baffle 7 are installed at the liquid inlet end of the valve body 1; the slow-closing valve member comprises a pressure-reducing valve flap 3 and a first support member 4, the pressure-reducing valve flap 3 faces the liquid inlet end side, and the first support member 4 faces the liquid outlet end side; a first positioning column 31 is installed at the bottom side of the pressure-reducing valve flap 3, the first positioning column 31 is penetrated on the first support member 4 and can slide along it, the pressure-reducing valve flap 3 moves away from the first annular baffle 2 as the liquid flows forward, and the pressure-reducing valve flap 3 adheres to the first annular baffle 2 as the liquid flows backward; there is a space between the outer peripheral edge of the pressure-reducing valve flap 3 and the inner wall of the valve body 1 There is a gap, and a slow-closing structure 32 is provided around the pressure-reducing valve flap 3. When the pressure-reducing valve flap 3 is attached to the first annular baffle 2, a flow channel for liquid circulation is formed between the slow-closing structure 32 and the first annular baffle 2; the closed valve component includes a closed valve flap 5 and a second support member 6, the closed valve flap 5 faces the liquid inlet side, and the second support member 6 faces the liquid outlet side; a second positioning column 51 is installed on the bottom side of the closed valve flap 5, and the second positioning column 51 is penetrated by the second support member 6 and can slide along it, the closed valve flap 5 moves away from the second annular baffle 7 as the liquid flows forward, and the closed valve flap 5 is attached to the second annular baffle 7 as the liquid flows back, and there is a gap between the outer peripheral edge of the closed valve flap 5 and the inner wall of the valve body 1.

[0025] The setting of the slow-closing valve member forms a flow channel with the first annular baffle 2, with a gap to achieve incomplete sealing closure, which can prevent the valve disc from closing quickly and causing water hammer effect, and realize the slow-closing function; the slow-closing valve member is combined with the first annular baffle 2 to form a first-stage valve, and the closed valve member is combined with the second annular baffle 7 to form a second-stage valve. The cooperation of the two-stage valve can achieve slow closing and non-return sealing closing functions to avoid water hammer effect. The gap between the valve disc and the inner wall of the valve body 1 forms a channel for liquid flow. The cooperation between the support member and the positioning column allows the valve disc to move along the support member.

[0026] The second annular baffle 7 is provided with a sealing gasket 8, and when the closed valve flap 5 is attached to the second annular baffle 7, the sealing gasket 8 is clamped between the closed valve flap 5 and the second annular baffle 7. The arrangement of the sealing gasket 8 enables the closed valve flap 5 to be sealed and attached to the second annular baffle 7, thereby stopping the phenomenon of liquid backflow.

[0027] The slow closing structure 32 is a wave-shaped plate, and the groove formed by the wave-shaped plate connects the space under the pressure reducing valve flap 3 with the space outside the pressure reducing valve flap 3 .

[0028] The first support member 4 includes a first support frame and a first positioning ring. The first support frame is fixed on the inner wall surface of the valve body 1, and the first positioning ring is arranged on the first support frame. The first positioning column 31 is sleeved in the first positioning ring and can slide up and down along the first positioning ring. The first support frame is used to support the pressure reducing valve disc 3, and the first positioning ring can restrict the range of movement of the first positioning column 31.

[0029] The first support frame includes three evenly distributed first support legs, one end of the first support leg is fixed on the inner wall surface of the valve body 1, and the other end of the first support leg is fixed on the first positioning ring.

[0030] The second support member 6 includes a second support frame and a second positioning ring. The second support frame is fixed on the inner wall surface of the valve body 1, and the second positioning ring is arranged on the second support frame. The second positioning column 51 is sleeved in the second positioning ring and can slide up and down along the second positioning ring.

[0031] The second support frame includes three evenly distributed second support legs, one end of the second support leg is fixed on the inner wall surface of the valve body 1, and the other end of the second support leg is fixed on the second positioning ring.

[0032] The two ends of the first supporting leg are located at different heights, and the two ends of the second supporting leg are located at different heights. Alternatively, the two ends of the first supporting leg are located at the same height, and the two ends of the second supporting leg are located at the same height.

[0033] Example 2

[0034] See also Figures 4 to 5 , is another comprehensive slow-closing check valve. The difference between Example 2 and Example 1 is that the slow-closing valve member further includes a first spring 33, which is sleeved on the outer periphery of the first positioning column 31, with one end of the first spring 33 pressing against the pressure reducing valve flap 3 and the other end of the first spring 33 pressing against the first supporting frame. The arrangement of the first spring 33 makes the pressure reducing valve flap 3 always tend to press against the first annular baffle 2, so that the check valve can be timely.

[0035] The closed valve member further comprises a second spring 52 , which is sleeved on the outer circumference of the second positioning column 51 , with one end of the second spring pressing against the closed valve flap 5 and the other end of the second spring pressing against the second support frame.

[0036] The sealing gasket 8 of this embodiment is a sealing gasket 8 made of metal material. The check valve of this embodiment is suitable for water supply, fire fighting, liquid fluid, oil and other media, and is also suitable for use in vertical pipe engineering, horizontal pipe and horizontal pipe.

[0037] The check valve is installed on the pipeline. In normal use, the liquid flows forward. The liquid pushes open the closed valve flap 5 from the liquid inlet end of the valve body 1, enters the space between the two valve parts, and then pushes open the pressure reducing valve flap 3, so as to flow out from the liquid outlet end of the valve body 1. Due to the presence of the first spring 33 and the second spring 52, the valve flap opens slowly. When the liquid flows back, under the action of the reflux liquid and the first spring 33, the pressure reducing valve flap 3 returns to its initial state, and the pressure reducing valve flap 3 is close to the first annular baffle 2, while the wave-shaped plate groove of the slow closing structure 32 forms a liquid reflux channel, so that there is still a gap between the pressure reducing valve flap 3 and the first annular baffle 2, forming an incomplete sealing closure, and the liquid enters the space between the two valve parts. At this time, under the action of the reflux liquid and the second spring 52, the closed valve flap 5 is pushed close to the second annular baffle 7 and close to the sealing gasket 8, and the liquid is isolated, thereby realizing the check function.

[0038] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not deviate from the present invention should be included in the patent scope of this case.

Claims

1. A comprehensive slow-closing check valve, characterized in that: The valve body comprises a valve body; a slow-closing valve member and a first annular baffle are installed at the liquid outlet end of the valve body, and a closed valve member and a second annular baffle are installed at the liquid inlet end of the valve body; the slow-closing valve member comprises a pressure-reducing valve flap and a first support member, the pressure-reducing valve flap faces the liquid inlet end, and the first support member faces the liquid outlet end; a first positioning column is installed at the bottom side of the pressure-reducing valve flap, the first positioning column is penetrated on the first support member and can slide along it, the pressure-reducing valve flap moves away from the first annular baffle as the liquid flows forward, and the pressure-reducing valve flap adheres to the first annular baffle as the liquid flows backward; there is a gap between the outer peripheral edge of the pressure-reducing valve flap and the inner wall of the valve body, and the pressure-reducing valve A slow-closing structure is provided around the flap, and when the pressure-reducing valve flap is attached to the first annular baffle, a flow channel for liquid circulation is formed between the slow-closing structure and the first annular baffle; the closed valve component includes a closed valve flap and a second support component, the closed valve flap faces the liquid inlet side, and the second support component faces the liquid outlet side; a second positioning column is installed on the bottom side of the closed valve flap, the second positioning column is penetrated by the second support component and can slide along it, the closed valve flap moves away from the second annular baffle as the liquid flows forward, and the closed valve flap is attached to the second annular baffle as the liquid flows back, and there is a gap between the outer peripheral edge of the closed valve flap and the inner wall of the valve body.

2. The integrated slow-closing check valve according to claim 1 is characterized in that: The second annular baffle is installed with a sealing gasket, and when the sealing valve disc is attached to the second annular baffle, the sealing gasket is clamped between the sealing valve disc and the second annular baffle.

3. The integrated slow-closing check valve according to claim 1 is characterized in that: The slow-closing structure is a wave-shaped plate, and a groove formed by the wave-shaped plate connects the space under the pressure-reducing valve flap with the space outside the pressure-reducing valve flap.

4. The integrated slow-closing check valve according to claim 1 is characterized in that: The first support member includes a first support frame and a first positioning ring. The first support frame is fixed on the inner wall surface of the valve body, and the first positioning ring is arranged on the first support frame. The first positioning column is sleeved in the first positioning ring and can slide up and down along the first positioning ring.

5. The integrated slow-closing check valve according to claim 4 is characterized in that: The slow-closing valve element further comprises a first spring, which is sleeved on the outer circumference of the first positioning column, with one end of the first spring pressing against the pressure-reducing valve flap and the other end of the first spring pressing against the first supporting frame.

6. The integrated slow-closing check valve according to claim 4 is characterized in that: The first support frame includes three evenly distributed first support legs, one end of the first support leg is fixed to the inner wall surface of the valve body, and the other end of the first support leg is fixed to the first positioning ring.

7. The integrated slow-closing check valve according to claim 1 is characterized in that: The second support member includes a second support frame and a second positioning ring. The second support frame is fixed on the inner wall surface of the valve body, and the second positioning ring is arranged on the second support frame. The second positioning column is sleeved in the second positioning ring and can slide up and down along the second positioning ring.

8. The integrated slow-closing check valve according to claim 7 is characterized in that: The closed valve component also includes a second spring, which is sleeved on the outer circumference of the second positioning column, with one end of the second spring pressing against the closed valve disc and the other end of the second spring pressing against the second support frame.

9. The integrated slow-closing check valve according to claim 7, characterized in that: The second support frame includes three evenly distributed second support legs, one end of the second support leg is fixed to the inner wall surface of the valve body, and the other end of the second support leg is fixed to the second positioning ring.

10. The integrated slow-closing check valve according to claim 6, characterized in that: Two ends of the first supporting foot are located at different heights.

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