Poppet valve type hydraulic check valve

Abstract

The utility model provides a kind of cone valve type hydraulic check valve, including valve body, the one end of valve body is closed end, and the other end is provided with valve cavity, and valve cavity is screwed with valve sleeve, and valve sleeve is provided with the valve core of axial sliding, back pressure spring is arranged between valve core and valve body, the section of valve core away from valve body is conical end, and conical end is sealed and abuts with the liquid inlet of valve sleeve, and the one end of valve core is connected with shaft rod, shaft rod can be axially moved, and another end of shaft rod is sealed and passes through the closed end of valve body. The utility model is moved to valve body by shaft rod and drives valve core, and the axial dimension of entire check valve is substantially unchanged, and it is suitable for the working environment of limited space.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, and in particular to a cone valve type hydraulic check valve. Background Technology

[0002] Hydraulic check valves are mainly used in hydraulic systems to prevent reverse flow of fluid. Existing hydraulic check valves are inconvenient to disassemble and assemble, which in turn makes it difficult to inspect and replace the back pressure spring or valve core; moreover, leakage is prone to occur at the valve core and the inlet.

[0003] In addition, existing hydraulic check valves also have both inlet and outlet ports located on the side wall of the bushing. A piston is installed inside the bushing on the side of the inlet port away from the outlet port. The piston abuts against the valve core via a connecting rod. This structure is normally used as a check valve. If reverse flow of liquid is required, the piston is controlled to move axially, which in turn moves the valve core via the connecting rod, thereby reversing the flow of liquid from the outlet port to the inlet port. This structure increases the axial dimension of the check valve, making it unsuitable if space is limited. Utility Model Content

[0004] This utility model proposes a cone valve type hydraulic check valve, which drives the valve core to move towards the valve body through the shaft. The axial dimension of the entire check valve remains basically unchanged, making it suitable for working environments with limited space.

[0005] The technical solution of this utility model is implemented as follows: a cone valve type hydraulic check valve includes a valve body, one end of which is a closed end, and the other end is provided with a valve cavity. A valve sleeve is screwed into the valve cavity, and an axially sliding valve core is provided inside the valve sleeve. A back pressure spring is provided between the valve core and the valve body. The part of the valve core away from the valve body is a cone-shaped end, which seals against the liquid inlet of the valve sleeve. The valve core is connected to one end of a shaft, which can move axially, and the other end of the shaft seal passes through the closed end of the valve body.

[0006] Furthermore, the valve sleeve has a liquid outlet hole on its side wall, the valve core has a through hole on its side wall, the valve core has a hollow cavity that communicates with the valve chamber, the liquid outlet hole communicates with the hollow cavity through the through hole, and the valve core also has a spiral groove on its side wall, the liquid outlet hole communicates with the valve chamber through the spiral groove.

[0007] Furthermore, one end of the shaft is fixedly connected to the valve core, and the other end slides through the sealing end of the valve body. A sealing ring is provided at the junction of the shaft and the sealing end.

[0008] Furthermore, a hollow bracket is fixed to one end of the valve core near the valve cavity, and the shaft is fixedly connected to the bracket.

[0009] Furthermore, a limit groove is provided at one end of the valve body near the valve sleeve, and a limit step is provided on the valve sleeve to cooperate with the limit groove.

[0010] Furthermore, a detachable limiting block is provided on the shaft on the outside of the valve body, and the limiting block abuts against the valve body seal.

[0011] Furthermore, a rectangular retaining ring and a second O-ring are provided on the outer wall of the valve sleeve between the inlet and the outlet.

[0012] Furthermore, a first O-ring is provided on the outer wall of the valve body.

[0013] The beneficial effects of this utility model are: This utility model is used daily as a one-way valve. With the setting of the shaft, if the liquid needs to flow in reverse, the shaft drives the valve core to move towards the valve body, thereby opening the liquid inlet. The axial dimension of the entire one-way valve remains basically unchanged, making it suitable for working environments with limited space.

[0014] The cone-type hydraulic check valve of this utility model, through the setting of back pressure spring and the cone end of valve core, and the cooperation of through hole, hollow cavity, spiral groove and valve cavity, makes the cone end of valve core seal against the liquid inlet, ensuring unidirectional liquid flow and avoiding leakage.

[0015] The structural fit of the valve body, valve sleeve, and valve core of this utility model facilitates the assembly and disassembly of the one-way valve, and thus facilitates the inspection and replacement of the back pressure spring and valve core. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model; Figure 2 This is a schematic diagram of the support structure.

[0018] Valve body 1, valve cavity 2, valve sleeve 3, limiting groove 4, limiting step 5, rectangular retaining ring 6, second O-ring 7, valve core 8, back pressure spring 9, conical end 10, liquid inlet 11, shaft 12, sealing ring 13, limiting block 14, sealing gasket 15, liquid outlet 16, through hole 17, hollow cavity 18, spiral groove 19, bracket 20. Detailed Implementation

[0019] 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.

[0020] like Figure 1 As shown, a cone-type hydraulic check valve includes a valve body 1, one end of which is closed, and the other end has a valve cavity 2. A valve sleeve 3 is screwed into the valve cavity 2. A limiting groove 4 is provided at the end of the valve body 1 near the valve sleeve 3. A limiting step 5 is provided on the valve sleeve 3 to cooperate with the limiting groove 4. The limiting step 5 and the valve sleeve 3 are an integral structure. Through the cooperation of the limiting groove 4 and the limiting step 5, the distance of the valve sleeve 3 into the valve cavity 2 is limited. A rectangular retaining ring 6 and a second O-ring 7 are fixed on the outer wall of the valve sleeve 3 between the inlet port 11 and the outlet port 16. A first O-ring is fixed on the outer wall of the valve body 1 to ensure the sealing of the check valve after installation.

[0021] The valve sleeve 3 is provided with an axially sliding valve core 8. A back pressure spring 9 is provided between the valve core 8 and the valve body 1. The part of the valve core 8 away from the valve body 1 is a tapered end 10. The end of the valve sleeve 3 away from the valve body 1 is provided with a liquid inlet 11. The tapered end 10 and the liquid inlet 11 of the valve sleeve 3 are sealed and abutted.

[0022] like Figure 1 and 2 As shown, a perforated bracket 20 is fixed to one end of the valve core 8 near the valve cavity 2. The bracket 20 is fixedly connected to one end of the shaft 12, and the other end of the shaft 12 slides through the sealing end of the valve body 1. A sealing ring 13 is fixed at the junction of the shaft 12 and the sealing end. A limit block 14 is also screwed onto the shaft 12 on the outside of the valve body 1. A sealing gasket 15 is fixed to the side of the limit block 14 near the valve body 1, and the limit block 14 seals against the valve body 1 through the sealing gasket 15. When it is necessary to disassemble the valve core 8 or the back pressure spring 9, unscrew the limit block 14 from the shaft 12, then rotate the disassembly valve sleeve 3, and finally pull out the valve core 8 and the shaft 12.

[0023] The valve sleeve 3 has circumferentially distributed outlet holes 16 on its side wall, and the valve core 8 has a through hole 17 on its side wall. The valve core 8 has a hollow cavity 18 that communicates with the valve chamber 2. The outlet holes 16 communicate with the hollow cavity 18 through the through hole 17. The valve core 8 also has a spiral groove 19 on its side wall, and the outlet holes 16 communicate with the valve chamber 2 through the spiral groove 19.

[0024] The method of using the cone valve type hydraulic check valve is as follows: The back pressure spring 9 causes the cone end 10 of the valve core 8 to seal against the inlet 11. Liquid enters the valve chamber 2 through the outlet hole 16, through hole 17, and hollow cavity 18, or through the outlet hole 16 and spiral groove 19, further pushing the valve core 8 to seal against the inlet 11, preventing the outlet hole 16 from flowing back into the inlet 11, thereby achieving one-way flow; while the liquid in the inlet 11 pushes the valve core 8 to move towards one side of the valve body 1, compressing the back pressure spring 9, thereby opening the inlet 11.

[0025] If reverse flow is required, pull the shaft 12 outward. The shaft 12 will drive the valve core 8 to move towards the valve body 1, thereby opening the inlet 11. The liquid at the outlet 16 can flow back into the inlet 11.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cone-type hydraulic check valve, comprising a valve body, one end of which is a closed end, and the other end having a valve chamber, a valve sleeve screwed into the valve chamber, an axially sliding valve core disposed within the valve sleeve, and a back pressure spring disposed between the valve core and the valve body, characterized in that: The section of the valve core furthest from the valve body is a tapered end, which seals against the inlet of the valve sleeve. The valve core is connected to one end of the shaft, which can move axially, and the other end of the shaft seal passes through the closed end of the valve body.

2. The cone valve type hydraulic check valve according to claim 1, characterized in that: The valve sleeve has a liquid outlet hole on its side wall, the valve core has a through hole on its side wall, and the valve core has a hollow cavity that communicates with the valve chamber. The liquid outlet hole communicates with the hollow cavity through the through hole. The valve core also has a spiral groove on its side wall, and the liquid outlet hole communicates with the valve chamber through the spiral groove.

3. A cone valve type hydraulic check valve according to claim 1, characterized in that: One end of the shaft is fixedly connected to the valve core, and the other end slides through the sealing end of the valve body. A sealing ring is provided at the junction of the shaft and the sealing end.

4. A cone valve type hydraulic check valve according to claim 3, characterized in that: A hollow bracket is fixed to one end of the valve core near the valve cavity, and the shaft is fixedly connected to the bracket.

5. A cone valve type hydraulic check valve according to claim 1, characterized in that: A limit groove is provided at one end of the valve body near the valve sleeve, and a limit step is provided on the valve sleeve to cooperate with the limit groove.

6. A cone valve type hydraulic check valve according to claim 1, characterized in that: A detachable limiting block is also provided on the shaft on the outside of the valve body, and the limiting block abuts against the valve body seal.

7. A cone valve type hydraulic check valve according to claim 1, characterized in that: A rectangular retaining ring and a second O-ring are provided on the outer wall of the valve sleeve between the liquid inlet and the liquid outlet.

8. A cone valve type hydraulic check valve according to claim 1, characterized in that: A first O-ring is provided on the outer wall of the valve body.

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