hydraulic check valve

Abstract

The invention provides a hydraulic one-way valve, and belongs to the technical field of valves. The hydraulic one-way valve solves problems that the existing one-way valve is unstable in use, and generates vibration and noises. The hydraulic one-way valve comprises a main body with a through hole running inside as well as a valve element and a spring, wherein the valve element and the spring are arranged in the through hole; the inner side wall at the front end of the main body is provided with a ring-shaped sealing surface; the inner side wall at the rear end of the main body is provided with a convex shoulder; the valve element is arranged between the convex shoulder and the sealing surface; the spring is arranged between the convex shoulder and the valve element, and under the action of elastic force of the spring, the valve element can resist against and can form seal with the sealing surface; the inner side wall of the main body can limit the valve element in the radial direction and can enable the valve element to move along the axis of the main body all the time; and a flow-passing channel which is communicated with the front side and the rear side of the valve element when the valve element is separated away from the sealing surface is further arranged inside the main body. The hydraulic one-way valve disclosed by the invention is high in using stability and sensitivity, and capable of lowering vibration and noises.

Description

technical field

[0001] The invention belongs to the technical field of valves, and relates to a valve, in particular to a hydraulic one-way valve. Background technique

[0002] A one-way valve is a valve in which the fluid flowing through the one-way valve can only flow from the inlet to the outlet, and the fluid at the outlet cannot flow back. Because of its anti-backflow characteristics, check valves are used in various hydraulic tools and hydraulic equipment.

[0003] Such as figure 1 As shown, the structure of the one-way valve generally includes a body with a cylindrical through hole inside, a valve core and a spring both arranged in the body, and the inner walls at both ends of the body have annular sealing surfaces and annular shoulders respectively. The spool is located between the sealing surface and the shoulder, and the spring is located between the spool and the shoulder and can exert force on the spool, so that the spool leans against the sealing surface to fo...

Examples

Embodiment 1

[0029] Such as image 3 and Figure 4 As shown, the hydraulic check valve is used at the oil outlet of the plunger pump, and includes a cylindrical body 1 with a through-hole 1a penetrating in the axial direction, a valve core 3 and a ball all arranged in the through-hole 1a. Holder 5 and spring 4, the inner wall of the front end of body 1 has an annular sealing surface 12a coaxial with body 1, and the inner wall of main body 1 rear end has an annular shoulder 11a coaxial with body 1. The spool 3 is located between the shoulder 11a and the sealing surface 12a, the spring 4 is arranged between the shoulder 11a and the spool 3 and the spool 3 can abut against the sealing surface 12a and form a seal under the elastic force of the spring 4, The ball holder 5 is arranged between the valve core 3 and the spring 4 .

[0030] In this embodiment, the valve core 3 is a bearing steel ball; the front part of the ball holder 5 has an opening 51 where the rear end of the valve core 3 can ...

Embodiment 2

[0037] The technical solution in this embodiment is substantially the same as that in Embodiment 1, except that the hydraulic check valve in this embodiment is used at the oil inlet of the plunger pump, and both the valve body 11 and the valve seat 12 are cylindrical , the rear end of the valve seat 12 is sleeved on the outside of the valve body 11 and the two are threaded, the rear end surface of the valve seat 12 is flat with the rear end surface of the valve body 11; the strip hole 6 is opened on the front end surface of the valve seat 12 , the annular groove is located on the rear end surface of the valve seat 12;

[0038] In the hydraulic check valve, the radial limit of the spool 3 and the flow passage for the liquid medium to flow through can be used in addition to the above-mentioned technical solutions of the through hole 11b as a round hole and the flow groove 11c, the following technologies can also be used Solution: such as Figure 8 and Figure 9 As shown, the s...

technical field

[0001] The invention belongs to the technical field of valves, and relates to a valve, in particular to a hydraulic one-way valve. Background technique

[0002] A one-way valve is a valve in which the fluid flowing through the one-way valve can only flow from the inlet to the outlet, and the fluid at the outlet cannot flow back. Because of its anti-backflow characteristics, check valves are used in various hydraulic tools and hydraulic equipment.

[0003] Such as figure 1 As shown, the structure of the one-way valve generally includes a body with a cylindrical through hole inside, a valve core and a spring both arranged in the body, and the inner walls at both ends of the body have annular sealing surfaces and annular shoulders respectively. The spool is located between the sealing surface and the shoulder, and the spring is located between the spool and the shoulder and can exert force on the spool, so that the spool leans against the sealing surface to fo...

Examples

Embodiment 1

[0029] Such as image 3 and Figure 4 As shown, the hydraulic check valve is used at the oil outlet of the plunger pump, and includes a cylindrical body 1 with a through-hole 1a penetrating in the axial direction, a valve core 3 and a ball all arranged in the through-hole 1a. Holder 5 and spring 4, the inner wall of the front end of body 1 has an annular sealing surface 12a coaxial with body 1, and the inner wall of main body 1 rear end has an annular shoulder 11a coaxial with body 1. The spool 3 is located between the shoulder 11a and the sealing surface 12a, the spring 4 is arranged between the shoulder 11a and the spool 3 and the spool 3 can abut against the sealing surface 12a and form a seal under the elastic force of the spring 4, The ball holder 5 is arranged between the valve core 3 and the spring 4 .

[0030] In this embodiment, the valve core 3 is a bearing steel ball; the front part of the ball holder 5 has an opening 51 where the rear end of the valve core 3 can ...

Embodiment 2

[0037] The technical solution in this embodiment is substantially the same as that in Embodiment 1, except that the hydraulic check valve in this embodiment is used at the oil inlet of the plunger pump, and both the valve body 11 and the valve seat 12 are cylindrical , the rear end of the valve seat 12 is sleeved on the outside of the valve body 11 and the two are threaded, the rear end surface of the valve seat 12 is flat with the rear end surface of the valve body 11; the strip hole 6 is opened on the front end surface of the valve seat 12 , the annular groove is located on the rear end surface of the valve seat 12;

[0038] In the hydraulic check valve, the radial limit of the spool 3 and the flow passage for the liquid medium to flow through can be used in addition to the above-mentioned technical solutions of the through hole 11b as a round hole and the flow groove 11c, the following technologies can also be used Solution: such as Figure 8 and Figure 9 As shown, the s...

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