CN217463332U

CN217463332U - One-way valve port flow channel structure capable of eliminating noise

Info

Publication number: CN217463332U
Application number: CN202122191449.9U
Authority: CN
Inventors: 陈坚锋; 吴凯平; 郝跃跃; 曾玉粦; 宋颜和; 劳宏才
Original assignee: Guangzhou Huitong Precision Hydraulic Co ltd
Current assignee: Guangzhou Huitong Precision Hydraulic Co ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2022-09-20
Anticipated expiration: 2031-09-10

Abstract

The utility model discloses a can noise abatement's check valve port runner structure, at least including case, valve body and piston rod, the case with the piston rod all set up in the valve body, the valve body has first cavity and second cavity, first cavity with the respective internal diameter of second cavity is roughly equal, is provided with interface channel between first cavity and the second cavity, and interface channel's internal diameter is less than the internal diameter of first cavity the case set up in under the condition in the first cavity, the diameter of the first end of case is crescent in the direction along the directional first cavity of second cavity.

Description

One-way valve port flow channel structure capable of eliminating noise

Technical Field

The utility model relates to a check valve technical field especially relates to a but noise abatement's check valve port runner structure.

Background

The hydraulic one-way valve is a device which can only flow along an oil inlet and can not return a medium at an oil outlet, and is used for preventing hydraulic oil from reversely flowing in a hydraulic system. There are many check valves known in the art. For example, patent document No. CN202597788U discloses a hydraulic check valve, which includes a valve body, a valve core, a spring, and a spring seat, wherein the spring seat is installed in the valve body, the valve core is sleeved on the spring seat, one end of the spring abuts against the spring seat, the other end of the spring abuts against the valve core, the valve core is positioned at an oil inlet of the valve body under the action of spring force, the valve core seals the oil inlet, the top of the valve core has an inclined sealing surface, and a sealing ring is arranged between the sealing surface and the inner side of the valve body. The hydraulic one-way valve has the advantages of good sealing performance, long service life and the like.

The existing check valve often has a noise problem in the test process. Aiming at the noise problem that the hydraulic control structure of the hydraulic control check valve appears in the test process, through analysis, the reason that the noise problem produces is: the clearance between the hydraulic control structure and the valve core position can generate larger pressure and speed difference, a vortex area is formed between the valve core and the piston rod, the hydraulic control one-way valve generates noise when the opening is opened less, the abrasion of the sealing surface of the valve core is larger, the service life of the hydraulic control one-way valve is shortened, and the stability of the valve is greatly influenced. Therefore, the present application is directed to a check valve port flow passage structure capable of eliminating noise and overcoming the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's shortcoming, provide a one-way valve port runner structure that can eliminate noise.

The purpose of the utility model is realized through the following technical scheme: a one-way valve port flow channel structure capable of eliminating noise at least comprises a valve core, a valve body and a piston rod, wherein the valve core and the piston rod are arranged in the valve body, the valve body is provided with a first cavity and a second cavity, the inner diameters of the first cavity and the second cavity are approximately equal, a connecting channel is arranged between the first cavity and the second cavity, the inner diameter of the connecting channel is smaller than that of the first cavity, and under the condition that the valve core is arranged in the first cavity, the diameter of a first end of the valve core is gradually increased in the direction pointing to the first cavity along the second cavity.

Preferably, the minimum diameter of the first end is smaller than the inner diameter of the connecting channel, and the maximum diameter of the first end is larger than the inner diameter of the connecting channel.

Preferably, a compression spring is arranged in the first cavity, one end of the compression spring is connected to the inner wall of the first cavity, and the other end of the compression spring is connected to the second end of the valve core.

Preferably, the piston rod is nested in the second cavity, and the diameter of the first end of the piston rod is gradually increased in a direction from the first cavity to the second cavity.

Preferably, an oil inlet is formed in the first cavity and is communicated with the first cavity.

Preferably, an oil outlet is formed in the second cavity and communicated with the second cavity.

Preferably, a first fixing groove is formed in the piston rod, and a 0-shaped ring is nested in the first fixing groove.

Preferably, a second fixing groove is formed in the inner wall of the second cavity, and a steel wire check ring is embedded in the second fixing groove.

Preferably, a hydraulic control port is formed in the second cavity, the extending directions of the oil inlet and the oil outlet are approximately perpendicular to the axial direction of the valve body, and the extending direction of the hydraulic control port is approximately parallel to the axial direction of the valve body.

Preferably, the spool is capable of being separated from the connecting passage when the spool moves in a first direction, and the spool is capable of being brought into abutting contact with the connecting passage when the spool moves in a second direction opposite to the first direction.

The utility model has the advantages of it is following: in the process that fluid flows from the connecting channel to the first cavity, the flow rate is high due to the small area of the throttling port, the oblique fillet guide structure inhibits the smooth generation of vortices and negative pressure regions, and noise is eliminated. In the process of flowing fluid from the oil outlet to the connecting channel, because the change of the area of the inlet is small, the fluid disturbance can be reduced, the flow speed is stable, the energy loss is small, and meanwhile, the cone-tip structure inhibits the generation of smooth medium vortex and negative pressure area and eliminates noise.

Drawings

Fig. 1 is a schematic structural view of a preferred one-way valve port flow channel structure of the present invention capable of eliminating noise.

In the drawing, 1-a valve core, 2-a valve body, 3-0 type rings, 4-a steel wire retainer ring, 5-a piston rod, 6-a first cavity, 7-a second cavity, 8-a connecting channel, 9-a compression spring, 10-a first fixing groove, 11-a second fixing groove, 12-an oil inlet, 13-an oil outlet, 14-a liquid control port, 1 a-a first end, 1 b-a second end and 5 a-a first end.

Detailed Description

The invention will be further described with reference to the accompanying drawings, without limiting the scope of the invention to the following:

as shown in fig. 1, the present application provides a one-way valve port flow channel structure capable of eliminating noise, which at least includes a valve core 1, a valve body 2, a 0-shaped ring 3, a steel wire retainer ring 4 and a piston rod 5. The valve body 2 has a first cavity 6 and a second cavity 7. The inner diameters of the first cavity 6 and the second cavity 7 are substantially equal. A connecting channel 8 is arranged between the first cavity 6 and the second cavity 7. The inner diameter of the connecting channel 8 is smaller than the inner diameter of the first chamber 6. The valve core 1 is arranged in the first cavity 6. A compression spring 9 is also arranged in the first cavity 6. One end of the compression spring 9 is connected to the inner wall of the first chamber 6, and the other end of the compression spring 9 is connected to the spool 1. In the initial state, the compression spring 9 is in a compression state, so that the compression spring 9 can apply a certain thrust to the valve core 1, and then the valve core 1 can abut against and contact the connecting channel 8 under the action of the thrust, so that the connecting channel 8 is in a closed state. The inner diameter of the connecting channel 8 is smaller than the inner diameter of the first cavity 6, and in the case where the valve cartridge 1 is disposed in the first cavity 6, the diameter of the first end 1a of the valve cartridge 1 gradually increases in a direction toward the first cavity 6 along the second cavity 7. The other end of the compression spring 9 is connected to the second end 1b of the spool 1.

Preferably, a piston rod 5 is arranged in the second chamber 7. The piston rod 5 can move left and right along the axial direction of the second cavity 7. The piston rod 5 is provided with a first fixing groove 10. The fixing groove 10 is provided with the 0-shaped ring 3, and the sealing effect on the second cavity 7 can be improved by arranging the 0-shaped ring 3. The first end 5a of the piston rod 5 gradually increases in diameter in a direction pointing along the first cavity 6 towards the second cavity 7.

Preferably, a second fixing groove 11 is formed on an inner wall of the second chamber 7. The second fixing groove 11 is provided with a steel wire retainer ring 4 in a nested mode. The maximum distance to the right of the piston rod 5 can be limited by the wire loop.

Preferably, the valve body 2 is provided with an oil inlet 12, an oil outlet 13 and a hydraulic control port 14. The respective extending directions of the oil inlet 12 and the oil outlet 13 are substantially perpendicular to the axial direction of the valve body 2. The hydraulic control port 14 extends substantially in parallel with the axial direction of the valve body 2. The oil inlet 12 communicates with the second cavity 7. The oil outlet 13 communicates with the first chamber 6. The hydraulic control port 14 is communicated with the right end face of the piston rod 5, and when the right end of the valve body 2 is connected with a pipeline, hydraulic oil in the pipeline can apply horizontal leftward acting force on the piston rod 5. When the spool 1 moves in a first direction, the spool 1 can be separated from the connecting passage 8, and when the spool 1 moves in a second direction opposite to the first direction, the spool 1 can be brought into abutting contact with the connecting passage 8. As shown in fig. 1, the first direction may be a horizontal left direction and the second direction may be a horizontal right direction.

The working principle of this application does: as shown in fig. 1, the working medium enters the second chamber 7 from the oil inlet 12, and when the inlet pressure of the working medium is greater than the pre-tightening force of the spring, the valve element moves leftward, so that the connection channel 8 is opened, and the working medium is discharged from the oil outlet 3 along the opened valve element. The inlet pressure of the working medium is higher, the opening of the valve core is larger, the more the working medium flows out, and the valve core does not move until the valve core reaches a mechanical limit point; when the working medium flows in from the oil outlet 13, the hydraulic control port 14 is communicated with the oil outlet 13, the piston rod moves leftwards to jack the valve core due to different stress areas of the piston rod and the valve core, and the working medium flows to the oil inlet 12 from the oil outlet 13, so that the function of reverse flow is realized. When the fluid circulation device is used, fluid circulates from the connecting channel 8 to the first cavity 6, the flow speed is high due to the small area of the throttling port, and the oblique fillet guide structure inhibits generation of vortexes and negative pressure regions in the fluid flow and eliminates noise. In the process of flowing fluid from the oil outlet 13 to the connecting channel 8, because the change of the area of the inlet is small, the fluid disturbance can be reduced, the flow speed is stable, the energy loss is small, and meanwhile, the generation of smooth medium vortex and a negative pressure area is restrained by the conical tip structure, so that the noise is eliminated.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A one-way valve port flow channel structure capable of eliminating noise at least comprises a valve core (1), a valve body (2) and a piston rod (5), wherein the valve core (1) and the piston rod (5) are arranged in the valve body (2), the one-way valve port flow channel structure is characterized in that the valve body (2) is provided with a first cavity (6) and a second cavity (7), the inner diameters of the first cavity (6) and the second cavity (7) are approximately equal, a connecting channel (8) is arranged between the first cavity (6) and the second cavity (7), the inner diameter of the connecting channel (8) is smaller than the inner diameter of the first cavity (6), and under the condition that the valve core (1) is arranged in the first cavity (6), the diameter of a first end (1a) of the valve core (1) is gradually increased in the direction pointing to the first cavity (6) along the second cavity (7).

2. The noise-canceling check valve port flow channel structure according to claim 1, wherein the first end (1a) has a minimum diameter smaller than the inner diameter of the connecting channel (8), and the first end (1a) has a maximum diameter larger than the inner diameter of the connecting channel (8).

3. The flow passage structure of one-way valve port capable of eliminating noise according to claim 2, wherein a compression spring (9) is disposed in the first cavity (6), one end of the compression spring (9) is connected to the inner wall of the first cavity (6), and the other end of the compression spring (9) is connected to the second end (1b) of the valve core (1).

4. The check valve port flow channel structure capable of eliminating noise according to claim 2, wherein the piston rod (5) is nested in the second cavity (7), and the diameter of the first end (5a) of the piston rod (5) is gradually increased in a direction pointing to the second cavity (7) along the first cavity (6).

5. The check valve port flow channel structure capable of eliminating noise according to claim 4, wherein an oil inlet (12) is disposed on the first cavity (6), and the oil inlet (12) is communicated with the first cavity (6).

6. The noise-canceling check valve port flow channel structure according to claim 5, wherein an oil outlet (13) is provided on the second cavity (7), and the oil outlet (13) communicates with the second cavity (7).

7. The noise-canceling check valve port flow channel structure according to claim 6, wherein a first fixing groove (10) is formed in the piston rod (5), and a 0-ring (3) is nested in the first fixing groove (10).

8. The check valve port flow channel structure capable of eliminating noise according to claim 7, wherein a second fixing groove (11) is formed on the inner wall of the second cavity (7), and a steel wire retainer ring (4) is nested in the second fixing groove (11).

9. The flow passage structure of one-way valve port capable of eliminating noise according to claim 8, wherein the second cavity (7) is provided with a pilot control port (14), the extension directions of the oil inlet (12) and the oil outlet (13) are substantially perpendicular to the axial direction of the valve body (2), and the extension direction of the pilot control port (14) is substantially parallel to the axial direction of the valve body (2).

10. The noise-canceling check valve port flow passage structure according to claim 9, wherein the spool (1) is capable of being separated from the connection passage (8) when the spool (1) moves in a first direction, and the spool (1) is capable of coming into abutting contact with the connection passage (8) when the spool (1) moves in a second direction opposite to the first direction.