Axial-flow type check valve

Abstract

The utility model discloses an axial flow type check valve which comprises a valve body, a valve clack, a valve rod and a spring, the valve body is provided with a first port and a second port, the valve clack is arranged at the position of the first port, the valve rod and the spring which are used for telescopic operation are arranged between the valve clack and the second port, and the valve clack is arranged at the position of the second port. The valve body is provided with a supporting assembly, the supporting assembly comprises fixed panels and a movable panel, the movable panel is arranged between the fixed panels in an inserted mode, a plurality of medium through holes are formed in the movable panel in an annular array mode, one end of the valve rod abuts against the bottom of the movable panel, and the other end of the valve rod extends towards the second port. The axial-flow type check valve has the advantage of being convenient to disassemble and assemble, and the problem that when the check valve is maintained in the later period, disassembly and assembly are not convenient is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an axial flow check valve. Background Art

[0002] Check valves are commonly used in pipeline systems. The opening and closing of the valve disc is determined by the pressure difference between the inlet and outlet ends of the valve, thereby ensuring one-way transportation in the pipeline and blocking backflow in the pipeline. It has the characteristics of fast closing, low pressure loss and noise. The existing axial flow check valve is mainly composed of a valve body, a valve seat, a valve disc, a valve stem, a spring, etc. During use, the valve disc is prone to violent collision with the valve seat when working, causing wear on the sealing end of the valve disc. When replacing, the flange, valve cover, spring and other components need to be removed in sequence before the valve disc can be replaced and maintained. Disassembly during later maintenance is very inconvenient, which is not conducive to installation and maintenance by operators. Utility Model Content

[0003] In view of the above problems, the utility model provides an axial flow check valve, which has the advantage of being easy to disassemble and assemble, and solves the problem of inconvenient disassembly and assembly during later maintenance of the check valve.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an axial flow check valve, comprising a valve body, a valve disc, a valve stem and a spring, the valve body being provided with a first port and a second port, the valve stem being connected to the valve disc and operating on the first port through spring extension and contraction, the valve body being provided with a support assembly, the support assembly comprising a fixed panel, a movable panel and a plurality of clips, the movable panel being connected to the clips and being plugged and clamped on the fixed panel, the fixed panel being provided with a plurality of medium through holes arranged in a circular array, the clips being arranged in a circular array and being offset from the medium through holes.

[0005] By adopting the above technical solution, during installation, the movable panel is rotated clockwise to allow the buckle to be clamped in the fixed panel, and the downward contraction and displacement are achieved by using the downward pressure spring. During disassembly, the buckle is controlled to contract toward the axis while pressing the spring downward, and the movable panel is rotated clockwise or counterclockwise to achieve the transfer of the buckle to the medium through-hole. The movable panel and the fixed panel can be separated, and the flange, valve stem, and spring can be removed in turn to replace the internal parts. During installation, the movable panel is rotated and clamped from the medium through-hole to the fixed panel through the compression spring and the telescopic valve stem. This is different from the existing integrated support assembly, which needs to remove the flange, valve cover, spring and other components in turn before the valve disc can be replaced and maintained. This structure saves the disassembly and assembly time during later maintenance and improves work efficiency.

[0006] The utility model is further configured as follows: a positioning flange is provided on the fixed panel toward the movable panel, a first supporting protrusion is provided on the movable panel on the side corresponding to the positioning flange, a clearance opening is provided on the first supporting protrusion, the buckle is installed in the clearance opening and extends toward the side of the positioning flange, and a positioning slot adapted to the buckle is provided on the first supporting protrusion.

[0007] By adopting the above technical solution, the positioning flange and the first supporting protrusion are used to achieve alignment installation. At the same time, the buckle shrinks inward by squeezing the positioning flange. When it is rotated to one side of the positioning slot, the shrinkage pressure is released and a clamping is formed to provide a fixed support function on one side of the movable panel.

[0008] The utility model is further configured such that a second supporting protrusion is provided on one side of the first supporting protrusion, one end of the second supporting protrusion is connected to the movable panel, and the other end extends toward the fixed panel, and a positioning opening adapted to the second supporting protrusion is provided on one side of the positioning flange.

[0009] By adopting the above technical solution, when the second supporting protrusion is rotated by the medium through hole, one end is inserted into the positioning opening and rotates synchronously with the buckle. When the second supporting protrusion is fully inserted into the positioning opening, the buckle synchronously completes the snapping operation. At the same time, the second supporting protrusion provides supporting pressure on one side of the spring for the movable panel.

[0010] The utility model is further configured such that the buckle is provided with an extended leg and a clamping portion, one end of the extended leg is extended toward the first supporting protrusion, one end of the clamping portion is connected to the extended leg, and the other end is bent and extended toward one side of the positioning slot to form a clamp.

[0011] By adopting the above technical solution, an extended support leg is provided to release the clamping force when the clamping part and the positioning flange are installed, and the clamping part is inclined toward the side of the movable panel, and is bent and extended toward the side of the positioning slot. When abutting, the contraction pressure released by the extended support leg is clamped in the positioning slot, thereby realizing the role of positioning support.

[0012] The utility model is further configured such that a retreat convex portion is provided on the side of the clamping portion facing the second port, one end of the retreat convex portion is connected to the clamping portion close to the side of the yield opening, and the other end extends and protrudes toward the second port.

[0013] By adopting the above technical solution, during disassembly, the retreat convex portion is controlled to drive the clamping portion to move toward the axis of the movable panel, so that the clamping portion is away from the positioning slot and out of the clamping state, which is convenient for later disassembly.

[0014] The present invention is further configured such that a first gap is provided between the retreat protrusion and the clearance opening, and a second gap is provided between the clearance openings on both sides of the clamping portion.

[0015] By adopting the above technical solution, setting the first gap can allow the retreat protrusion and the extended support leg to form a certain clearance space in the clearance opening, and setting the second gap can avoid wear and structural interference caused by the buckle during radial contraction.

[0016] The present invention is further configured such that transition slopes are provided on both sides of the second supporting protrusion, and the transition slopes are configured to gradually shrink toward the positioning opening.

[0017] By adopting the above technical solution, the purpose of setting the transition slope is to prevent the second supporting surface from interfering with the plug-in interface and colliding with the structure during the telescopic operation, making the installation more portable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the support assembly, spring, valve disc and valve flap of the utility model;

[0020] Figure 3 This is a schematic structural diagram of the support assembly of the present utility model;

[0021] Figure 4 This is a schematic diagram of the movable panel structure of the utility model;

[0022] Figure 5 This is a schematic diagram of the fixed panel structure of the present utility model.

[0023] In the figure, 1 is the valve body; 2 is the valve disc; 3 is the valve stem; 4 is the spring; 5 is the first port; 8 is the second port; 9 is the support assembly; 10 is the fixed panel; 11 is the movable panel; 12 is the buckle; 13 is the medium through hole; 14 is the positioning flange; 15 is the first supporting protrusion; 16 is the clearance opening; 18 is the positioning slot; 19 is the second supporting protrusion; 20 is the positioning opening; 21 is the extended support leg; 23 is the clamping part; 24 is the retreat protrusion; 26 is the first gap; 27 is the transition slope; 28 is the second gap. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example: As shown in the attached Figures 1 to 5An axial flow check valve shown in the figure includes a valve body 1, a valve disc 2, a valve stem 3 (the valve disc 2 and the valve stem 3 are an integrated structure) and a spring 4. The valve body 1 is provided with a first port 5 and a second port 8. The valve stem 3 is connected to the valve disc 2 and operates on the first port 5 through telescopic movement of the spring 4. A support assembly 9 is installed on the valve body 1. The support assembly 9 includes a fixed panel 10, a movable panel 11 and a plurality of clips 12 (specifically, three to four are provided). The movable panel 11 is connected to the clips 12 (an integrated structure) and is plugged and clamped on the fixed panel 10. The fixed panel 10 is provided with a plurality of medium through holes 13 arranged in an annular array. The clips 12 are arranged in an annular array and are in a staggered state with the medium through holes 13. When installing, the movable panel 11 is rotated clockwise to allow the clips 12 to clamp. It is tight in the fixed panel 10 and uses the downward pressure spring 4 to achieve downward contraction and give way. When disassembling, the spring 4 is pressed downward by controlling the buckle 12 to contract toward the axis, and the movable panel 11 is rotated clockwise or counterclockwise to achieve the transfer of the buckle 12 to the medium through-hole 13. The movable panel 11 and the fixed panel 10 are separated, and the flange, valve stem 3, and spring 4 can be removed in turn to replace the internal parts. During installation, the movable panel 11 is rotated and clamped from the medium through-hole 13 to the fixed panel 10 by compressing the spring 4 and the telescopic valve stem 3. Different from the existing integrated structure support component 9, it is necessary to remove the flange, valve cover, spring 4 and other components in turn during replacement to replace and maintain the valve disc 2. This structure saves the disassembly and assembly time during later maintenance and improves work efficiency.

[0026] As attached Figure 3 , Attachment Figure 4 and attached Figure 5 As shown, a positioning flange 14 (an integrated structure, corresponding to the number of clips 12) is provided on the fixed panel 10 toward the movable panel 11, and a first supporting protrusion 15 (an integrated structure) is provided on the movable panel 11 on the side corresponding to the positioning flange 14. A clearance opening 16 (opened toward the side of the positioning flange 14) is provided on the first supporting protrusion 15, and the clip 12 is installed in the clearance opening 16 and extends toward the side of the positioning flange 14. A positioning slot 18 adapted to the clip 12 is provided on the first supporting protrusion 15, and the positioning flange 14 is used to achieve alignment installation on the first supporting protrusion 15. At the same time, the clip 12 shrinks inward by squeezing the positioning flange 14. When it is rotated to the side of the positioning slot 18, the shrinkage pressure is released and clamping is formed, which is used to provide a fixed support function on one side of the movable panel 11.

[0027] As attached Figure 3 and attached Figure 2As shown, a second supporting protrusion 19 (an integrated structure corresponding to the first supporting protrusion 15) is provided on one side of the first supporting protrusion 15, one end of the second supporting protrusion 19 is connected to the movable panel 11, and the other end is extended toward the fixed panel 10, and a positioning opening 20 adapted to the second supporting protrusion 19 is provided on one side of the positioning flange 14. When the second supporting protrusion 19 is rotated by the medium through hole 13, one end is inserted into the positioning opening 20 and rotates synchronously with the buckle 12. When the second supporting protrusion 19 is fully inserted into the positioning opening 20, the buckle 12 synchronously completes the clamping operation, and at the same time, the second supporting protrusion 19 provides supporting pressure on one side of the spring 4 for the movable panel 11.

[0028] As attached Figure 3 , Attachment Figure 4 and attached Figure 5 As shown, the buckle 12 is provided with an extended leg 21 and a clamping portion 23 (an integrated structure), one end of the extended leg 21 is extended toward the first supporting protrusion 15, one end of the clamping portion 23 is connected to the extended leg 21, and the other end is bent and extended toward the side of the positioning slot 18 to form a clamping. The extended leg 21 is provided to release the clamping force when the clamping portion 23 and the positioning flange 14 are installed, and is inclined toward the side of the movable panel 11. The clamping portion 23 is bent and extended toward the side of the positioning slot 18. When abutting, the contraction pressure released by the extended leg 21 is clamped in the positioning slot 18, thereby realizing the role of positioning support.

[0029] As attached Figure 1 , Attachment Figure 4 and attached Figure 5 As shown, the clamping portion 23 is provided with a retreat protrusion 24 (an integrated structure) on the side facing the second port 8. One end of the retreat protrusion 24 is connected to the clamping portion 23 on the side close to the clearance opening 16, and the other end extends and protrudes toward the side of the second port 8. During disassembly, the retreat protrusion 24 is controlled to drive the clamping portion 23 to move toward the axis of the movable panel 11, so that the clamping portion 23 is away from the positioning slot 18 and out of the engaged state, which is convenient for later disassembly.

[0030] As attached Figure 3 and attached Figure 4 As shown, a first gap 26 is provided between the retreat protrusion 24 and the clearance opening 16, and a second gap 28 is provided between the two sides of the clamping portion 23 and the clearance opening 16. The first gap 26 can allow the retreat protrusion 24 and the extended support leg 21 to form a certain clearance space in the clearance opening 16, and the second gap 28 can avoid wear and structural interference caused by the buckle 12 during radial contraction.

[0031] As attached Figure 4 and attached Figure 5As shown, transition slopes 27 are provided on both sides of the second supporting protrusion 19, and the transition slopes 27 are arranged in a gradually narrowing state toward the side of the positioning opening 20. The purpose of setting the transition slopes 27 is to prevent the second supporting protrusion 19 from interfering with the plug-in interface and colliding with the structure during the plug-in operation, making the installation more portable.

[0032] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are merely relational words determined 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 cannot be understood as a limitation on the present invention.

Claims

1. An axial flow check valve, comprising a valve body (1), a valve disc (2), a valve stem (3) and a spring (4), wherein the valve body (1) is provided with a first port (5) and a second port (8), and the valve stem (3) is connected to the valve disc (2) and is retracted and operated on the first port (5) via the spring (4), and is characterized in that: A support assembly (9) is installed on the valve body (1), and the support assembly (9) includes a fixed panel (10), a movable panel (11) and a plurality of clips (12). A positioning flange (14) is provided on the fixed panel (10) facing the movable panel (11), and a first supporting protrusion (15) is provided on the movable panel (11) on a side corresponding to the positioning flange (14). A clearance opening (16) is provided on the first supporting protrusion (15), and the clip (12) is installed in the clearance opening (16) and extends toward the side of the positioning flange (14). A positioning slot (18) adapted to the clip (12) is provided on the first supporting protrusion (15). A plurality of medium through holes (13) arranged in a ring array are provided on the fixed panel (10), and the clips (12) are arranged in a ring array and are in a staggered state with the medium through holes (13).

2. An axial flow check valve according to claim 1, characterized in that: A second supporting protrusion (19) is provided on one side of the first supporting protrusion (15); one end of the second supporting protrusion (19) is connected to the movable panel (11), and the other end extends toward the fixed panel (10); a positioning opening (20) adapted to the second supporting protrusion (19) is provided on one side of the positioning flange (14).

3. The axial flow check valve according to claim 2, characterized in that: The buckle (12) is provided with an extended leg (21) and a clamping portion (23), one end of the extended leg (21) is extended toward the first supporting protrusion (15), one end of the clamping portion (23) is connected to the extended leg (21), and the other end is bent toward one side of the positioning slot (18) and extended to form a clamping.

4. The axial flow check valve according to claim 3, characterized in that: The clamping portion (23) is provided with a retreat convex portion (24) on the side facing the second port (8); one end of the retreat convex portion (24) is connected to the clamping portion (23) on the side close to the clearance opening (16), and the other end extends and protrudes toward the second port (8).

5. The axial flow check valve according to claim 4, characterized in that: A first gap (26) is provided between the retreat convex portion (24) and the clearance opening (16), and a second gap (28) is provided between the two sides of the clamping portion (23) and the clearance opening (16).

6. The axial flow check valve according to claim 5, characterized in that: Transition slopes (27) are provided on both sides of the second supporting protrusion (19), and the transition slopes (27) are arranged in a gradually shrinking state toward one side of the positioning opening (20).

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