A one-way valve seat

Abstract

The utility model relates to the technical field of one -way valve seat, specifically at a one -way valve seat, including installation base, the installation base top assembly has the valve seat mechanism, the valve seat mechanism includes the limit cylinder, spring, connecting block, conical sealing head, sealing plate, clamping groove, sealing strip. The utility model when fluid no longer from the limit cylinder top enters, spring drives connecting block and conical sealing head to rise, and conical sealing head contacts sealing strip, forms the first seal defense line, and contact seal can effectively prevent fluid from the conical sealing head top and enter, and sealing strip is annular as a whole, and the lower surface is provided with the protruding vertical end, and the upper surface of conical sealing head is closely combined, and the sealing effect is further strengthened, and the conical sealing head rises in the process, and clamping groove contacts sealing plate, forms the second seal defense line, can prevent fluid from the damaged place and flow out because the conical sealing head outer wall is damaged, to ensure the reliability of sealing.

Description

Technical Field

[0001] This utility model relates to the field of one-way valve seat technology, specifically a one-way valve seat. Background Technology

[0002] A check valve is a valve that allows fluid to flow in only one direction while inhibiting flow in the opposite direction. These check valves are installed in hydraulic circuits or piping of refrigeration systems to prevent backflow of fluid. One type of check valve includes a valve core inserted inside the valve body. When refrigerant flows in the opposite direction, the valve core blocks the passage to prevent further backflow.

[0003] In the prior art, impurities can get stuck between the valve disc and the valve seat, forming a channel that leads to continuous leakage, or impurities can scratch the sealing surface, causing permanent damage and reducing the sealing performance of the check valve seat.

[0004] Therefore, a one-way valve seat is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a one-way valve seat, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: it includes a mounting base, and a valve seat mechanism is assembled on the top of the mounting base; The valve seat mechanism includes a limiting cylinder, a spring, a connecting block, a conical sealing head, a sealing plate, a groove, and a sealing strip. The lower surface of the limiting cylinder is fixedly connected to the upper surface of the mounting base. The spring is assembled inside the limiting cylinder. The connecting block is slidably connected to the inner wall of the limiting cylinder. The lower surface of the conical sealing head is fixedly connected to the upper surface of the connecting block. The sealing plate is fixedly connected to the side of the inner wall of the limiting cylinder. The groove is formed on the upper surface of the conical sealing head. The sealing strip is fixedly connected to the side of the limiting cylinder. A second sealing assembly is assembled inside the conical sealing head.

[0007] Preferably, the second sealing assembly includes a mounting groove, a hydraulic chamber, a first hydraulic rod, a second hydraulic rod, and a telescopic baffle. The mounting groove is formed on the upper surface of the conical sealing head, the hydraulic chamber is fixedly connected to the lower surface of the inner wall of the mounting groove, and the first hydraulic rod is slidably connected inside the hydraulic chamber via a piston.

[0008] Preferably, the second hydraulic rod is slidably connected to one end inside the hydraulic chamber via a piston, and the telescopic baffle is fixedly connected to the outer wall of the second hydraulic rod.

[0009] Preferably, the hydraulic chamber is filled with high-viscosity hydraulic oil, and the hydraulic chamber is an irregularly shaped hydraulic chamber with an overall U-shape, and the first hydraulic rod.

[0010] Preferably, the sealing strip is annular in shape, and the lower surface of the sealing strip has a protruding vertical end that fits against the upper surface of the conical sealing head.

[0011] Preferably, the telescopic baffle includes a thin plate and a thick plate, the thick plate being fixedly connected to the upper surface of the conical sealing head, and the thin plate being slidably connected to the inner wall of the thick plate.

[0012] Preferably, the second hydraulic rod is fixedly connected to the side of the thin plate, and a deformable rubber head is fixedly connected to the top of the thin plate.

[0013] Preferably, the two ends of the spring are fixedly connected to the lower surface of the inner wall of the limiting cylinder and the lower surface of the connecting block, respectively, and the outer wall of the limiting cylinder is provided with a liquid outlet.

[0014] Compared with the prior art, the present invention provides a one-way valve seat, which has the following beneficial effects: 1. When the fluid no longer enters from the top of the limiting cylinder, the spring drives the connecting block and the conical sealing head to rise. The conical sealing head contacts the sealing strip, forming the first line of defense. The contact seal can effectively prevent the fluid from entering from the top of the conical sealing head. The sealing strip is annular in shape, with a protruding vertical end on the lower surface, which fits tightly against the upper surface of the conical sealing head, further enhancing the sealing effect. During the rising process of the conical sealing head, the groove contacts the sealing plate, forming the second line of defense. This can prevent the fluid from flowing out from the damaged area due to damage to the outer wall of the conical sealing head, thereby ensuring the reliability of the seal.

[0015] Second, when the sealing plate descends, it compresses the first hydraulic rod, squeezing the hydraulic oil and pushing the second hydraulic rod upward, which in turn raises the telescopic baffle, forming a third line of defense. This hydraulically driven telescopic baffle can further prevent fluid leakage, and even if there are minor gaps or damage to the first two lines of defense, it can effectively prevent fluid from passing through. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view of part of the structure of this utility model; Figure 3 This is a schematic diagram of the compressed state of this utility model; Figure 4 This is a top view of part of the structure of this utility model; Figure 5 This utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0017] In the diagram: 1. Mounting base; 2. Valve seat mechanism; 21. Limiting cylinder; 22. Spring; 23. Connecting block; 24. Conical sealing head; 25. Sealing plate; 26. Slot; 27. Hydraulic chamber; 28. First hydraulic rod; 29. ​​Second hydraulic rod; 210. Telescopic baffle; 211. Sealing strip; 3. Liquid outlet. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example See Figures 1-5 This embodiment provides a one-way valve seat, including a mounting base 1, and a valve seat mechanism 2 is mounted on the top of the mounting base 1; The valve seat mechanism 2 includes a limiting cylinder 21, a spring 22, a connecting block 23, a conical sealing head 24, a sealing plate 25, a groove 26, and a sealing strip 211. The lower surface of the limiting cylinder 21 is fixedly connected to the upper surface of the mounting base 1. The spring 22 is assembled inside the limiting cylinder 21. The connecting block 23 is slidably connected to the inner wall of the limiting cylinder 21. The lower surface of the conical sealing head 24 is fixedly connected to the upper surface of the connecting block 23. The sealing plate 25 is fixedly connected to the side of the inner wall of the limiting cylinder 21. The groove 26 is opened on the upper surface of the conical sealing head 24. The sealing strip 211 is fixedly connected to the side of the limiting cylinder 21. A second sealing component is assembled inside the conical sealing head 24.

[0020] Under positive fluid pressure, fluid enters from the top inlet of the limiting cylinder 21, impacting and pushing the conical sealing head 24 downwards against the preload of the spring 22. The conical sealing head 24 transmits the motion through the connecting block 23 and compresses the spring 22. When the conical sealing head 24 descends until its side completely avoids the lower edge of the sealing plate 25, exposing the outlet 3 below, the fluid can flow smoothly out of the outlet 3, and the valve is in the open state. When the upstream fluid pressure disappears or is lower than the downstream pressure, the compressed spring 22 releases energy, pushing the connecting block 23 upwards to reset, thereby causing the conical sealing head 24 to rise rapidly. During this closing process, firstly... The upper edge of the conical sealing head 24 fits tightly against the protruding vertical end of the sealing strip 211, forming the first sealing line, which effectively prevents fluid from leaking from the gap between the top of the conical sealing head 24 and the valve body. Subsequently, as the conical sealing head 24 continues to rise, the groove 26 structure on its upper surface fits or comes into close contact with the inner edge of the sealing plate 25 fixed on the limiting cylinder 21, forming the second sealing line. This sealing design is particularly important. Even if the outer wall of the conical sealing head 24 is worn or damaged, which may cause the first seal to be incomplete, it can still ensure the reliability of the seal through this independent sealing interface and prevent fluid from leaking from the damaged area.

[0021] See Figure 5 The second sealing assembly includes an installation groove, a hydraulic chamber 27, a first hydraulic rod 28, a second hydraulic rod 29, and a telescopic baffle 210. The installation groove is opened on the upper surface of the conical sealing head 24. The hydraulic chamber 27 is fixedly connected to the lower surface of the inner wall of the installation groove. The first hydraulic rod 28 is slidably connected to the inside of the hydraulic chamber 27 via a piston.

[0022] When the valve is opened, the conical sealing head 24 moves downward under the pressure of the fluid. The stationary sealing plate 25 continuously applies pressure to the top of the first hydraulic rod 28, forcing the piston of the first hydraulic rod 28 to move downward. The downward movement of the piston compresses the high-viscosity hydraulic oil filled in the hydraulic chamber 27. The hydraulic oil transmits the pressure to the piston at the bottom of the second hydraulic rod 29, thereby driving the second hydraulic rod 29 to extend upward. The upward movement of the second hydraulic rod 29 then pushes the telescopic baffle 210 to expand radially outward. In this way, a third line of defense is pre-set during the normal opening of the valve. This line of defense can play a blocking role when the valve is closed, or be passively activated to provide an emergency seal when the main seal fails.

[0023] The second hydraulic rod 29 is slidably connected to one end inside the hydraulic chamber 27 via a piston. The telescopic baffle 210 is fixedly connected to the outer wall of the second hydraulic rod 29. The lower end of the second hydraulic rod 29 is also slidably and sealingly connected to the other end inside the hydraulic chamber 27 via a piston. The telescopic baffle 210 is fixedly connected to the outer wall of the rod body of the second hydraulic rod 29, thereby ensuring that the linear motion of the second hydraulic rod 29 can be accurately and directly converted into the telescopic action of the telescopic baffle 210.

[0024] See Figure 5 The hydraulic chamber 27 is filled with high-viscosity hydraulic oil. The hydraulic chamber 27 is an irregularly shaped hydraulic chamber with an overall U-shape. The first hydraulic rod 28 uses its flow resistance characteristics to buffer and regulate the movement speed. The hydraulic chamber 27 is designed with an irregular structure and its overall shape is U-shaped, so that the first hydraulic rod 28 and the second hydraulic rod 29 can be arranged opposite each other in a non-collinear manner. It cleverly uses the hydraulic principle to convert the vertical driving force into the horizontal sealing force.

[0025] See Figure 5 The sealing strip 211 is annular in shape, and a protruding vertical end is provided on the lower surface of the sealing strip 211. The vertical end fits against the upper surface of the conical sealing head 24. The vertical lip can maintain a continuous and tight fit with the upper edge of the conical sealing head 24 in a natural state or under pressure. This lip-shaped sealing structure can effectively adapt to small fluctuations and enhance the sealing effect of the first line of defense.

[0026] The telescopic baffle 210 includes a thin plate and a thick plate. The thick plate is fixedly connected to the upper surface of the conical sealing head 24, and the thin plate is slidably connected to the inner wall of the thick plate.

[0027] The second hydraulic rod 29 is fixedly connected to the side of the thin plate, and a deformable rubber head is fixedly connected to the top of the thin plate.

[0028] The two ends of the spring 22 are fixedly connected to the lower surface of the inner wall of the limiting cylinder 21 and the lower surface of the connecting block 23, respectively. The outer wall of the limiting cylinder 21 has a liquid outlet 3.

[0029] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A one-way valve seat, characterized in that: Includes a mounting base (1), on the top of which a valve seat mechanism (2) is mounted; The valve seat mechanism (2) includes a limiting cylinder (21), a spring (22), a connecting block (23), a conical sealing head (24), a sealing plate (25), a slot (26), and a sealing strip (211). The lower surface of the limiting cylinder (21) is fixedly connected to the upper surface of the mounting base (1). The spring (22) is assembled inside the limiting cylinder (21). The connecting block (23) is slidably connected to the inner wall of the limiting cylinder (21). The lower surface of the conical sealing head (24) is fixedly connected to the upper surface of the connecting block (23). The sealing plate (25) is fixedly connected to the side of the inner wall of the limiting cylinder (21). The slot (26) is opened on the upper surface of the conical sealing head (24). The sealing strip (211) is fixedly connected to the side of the limiting cylinder (21). A second sealing component is assembled inside the conical sealing head (24).

2. A one-way valve seat according to claim 1, characterized in that: The second sealing assembly includes an installation groove, a hydraulic chamber (27), a first hydraulic rod (28), a second hydraulic rod (29), and a telescopic baffle (210). The installation groove is formed on the upper surface of the conical sealing head (24). The hydraulic chamber (27) is fixedly connected to the lower surface of the inner wall of the installation groove. The first hydraulic rod (28) is slidably connected inside the hydraulic chamber (27) via a piston.

3. A one-way valve seat according to claim 2, characterized in that: The second hydraulic rod (29) is slidably connected to one end inside the hydraulic chamber (27) via a piston, and the telescopic baffle (210) is fixedly connected to the outer wall of the second hydraulic rod (29).

4. A one-way valve seat according to claim 3, characterized in that: The hydraulic chamber (27) is filled with high-viscosity hydraulic oil. The hydraulic chamber (27) is an irregularly shaped hydraulic chamber with an overall U-shaped shape. The first hydraulic rod (28) is also present.

5. A one-way valve seat according to claim 1, characterized in that: The sealing strip (211) is annular in shape, and a protruding vertical end is provided on the lower surface of the sealing strip (211), which is in contact with the upper surface of the conical sealing head (24).

6. A one-way valve seat according to claim 2, characterized in that: The telescopic baffle (210) includes a thin plate and a thick plate. The thick plate is fixedly connected to the upper surface of the conical sealing head (24), and the thin plate is slidably connected to the inner wall of the thick plate.

7. A one-way valve seat according to claim 2, characterized in that: The second hydraulic rod (29) is fixedly connected to the side of the thin plate, and a deformable rubber head is fixedly connected to the top of the thin plate.

8. A one-way valve seat according to claim 1, characterized in that: The two ends of the spring (22) are fixedly connected to the lower surface of the inner wall of the limiting cylinder (21) and the lower surface of the connecting block (23), respectively. The outer wall of the limiting cylinder (21) is provided with a liquid outlet (3).

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