High-pressure one-way valve

Abstract

A valve element is installed in an outer valve body, a first step and a second step are arranged on the valve body, the valve element comprises a valve head and a valve clack which are used for being matched with the first step and the second step, the valve head makes contact with the first step arranged on the valve body, and the valve clack is installed in the second step in a sliding mode. When the valve element is subjected to pressure brought by water flow, under the condition that the pressure is small, the valve element moves backwards, at the moment, the valve head is separated from the first step, but the valve clack is still located in the second step, and the water flow flows out through the water drainage channel. When the water flow pressure is large, the valve element moves backwards, the pressure borne by the valve element is large, the movement distance is large, at the moment, the valve head is separated from the first step, the valve clack moves out of the second step, water flow can flow out through the water drainage channel and the second step, and the whole flow of the one-way valve is large in the state.

Description

Technical Field

[0001] The utility model relates to the technical field of one-way valves, in particular to a high-pressure one-way valve. Background Art

[0002] A one-way valve, also known as a check valve or a non-return valve, is generally installed in a liquid passage or used in a pneumatic system. Its main function is to limit the direction of water flow so that the liquid can only flow in one direction and prevent liquid backflow. It is usually used in a liquid passage and at the outlet of a hydraulic pump to prevent the hydraulic pump from being damaged by oil backflow due to excessive system pressure; to separate unnecessary connections in the oil circuit; to achieve a pressure-maintaining function using its good sealing properties; and to form a composite valve with other components, such as a one-way throttle valve, a one-way sequence valve, etc.

[0003] Check valves are widely used in many fields. In hydraulic systems, check valves can control the flow direction of liquids to prevent hydraulic shock and liquid backflow. In pneumatic systems, check valves can prevent gas backflow and ensure the normal flow of gas. In hydraulic systems, check valves can control the flow direction of water to achieve one-way flow of water. In addition, check valves are also widely used in chemical, mechanical, energy and other fields.

[0004] In existing one-way valves, the flow rate is mostly fixed. A one-way valve suitable for high pressure cannot be used in a low-pressure passage, and a one-way valve suitable for low pressure cannot be used in a high-pressure passage. Utility Model Content

[0005] The technical solution adopted by the utility model is: to provide a high-pressure one-way valve, including an outer valve body and a valve core, the valve core is installed in the outer valve body, the outer valve body includes a valve body, the valve body is provided with a first step and a second step, the valve core includes a valve head and a valve disc for cooperating with the first step and the second step, the valve head is in contact with the first step provided on the valve body, the valve disc is slidably installed in the second step, and a water drainage channel is provided on the second step.

[0006] Furthermore, a water inlet is arranged at one end of the valve body close to the valve head, and a water outlet is arranged at one end of the valve body away from the valve head.

[0007] Furthermore, a valve cavity for water to flow through is provided in the valve body.

[0008] Furthermore, a valve seat for cooperating with the valve disc is installed in the valve cavity, and a spring is installed between the valve seat and the valve disc.

[0009] Furthermore, a sleeve is arranged at one end of the valve disc close to the valve seat, a core shaft is arranged at one end of the valve seat close to the valve disc, and the sleeve is sleeved on the core shaft.

[0010] Furthermore, the valve seat is provided with a through hole for water to pass through.

[0011] The beneficial effects of the utility model are:

[0012] The distance between the drainage channel of the device and the first step is smaller than the length of the valve disc. When the valve core is subjected to the pressure brought by the water flow, under the condition of low pressure, the valve core moves backwards. At this time, the valve head is separated from the first step, but the valve disc is still located in the second step, and the water flows out through the drainage channel. In this state, the overall flow rate of the one-way valve is small. When the water flow pressure is large, the valve core moves backwards. The valve core is subjected to large pressure, so the movement distance is large. At this time, the valve head is separated from the first step, and the valve disc moves to the outside of the second step. The water can flow out through the drainage channel and the second step. In this state, the overall flow rate of the one-way valve is large.

[0013] A sleeve is arranged at one end of the valve disc close to the valve seat, and the sleeve is coaxially arranged with the valve disc. A core shaft is arranged at one end of the valve seat close to the valve disc, and the valve seat and the core shaft are coaxially arranged. The sleeve is sleeved on the core shaft. The sleeve and the core shaft can realize the function of limiting the movement trajectory of the valve disc and preventing the valve disc from deviating. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall cross-sectional structure of a high-pressure one-way valve described in the utility model;

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure of an outer valve body of a high-pressure one-way valve described in the utility model;

[0016] Figure 3 It is a three-dimensional structural schematic diagram of a valve core of a high-pressure one-way valve described in the utility model;

[0017] In the figure: outer valve body 1; valve body 11; water inlet 12; first step 13; second step 14; drain channel 15; valve cavity 16; water outlet 17; valve core 2; valve head 21; valve disc 22; sleeve 23; core shaft 24; valve seat 25; through hole 26; spring 27. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Example 1

[0020] This embodiment discloses a high pressure one-way valve. Figure 1-Figure 3As shown, it comprises an outer valve body 1 and a valve core 2, wherein the valve core 2 is installed in the outer valve body 1, wherein the outer valve body 1 comprises a valve body 11, wherein the valve body 11 is provided with a first step 13 and a second step 14, wherein the valve core 2 comprises a valve head 21 and a valve flap 22 for cooperating with the first step 13 and the second step 14, wherein the valve head 21 contacts the first step 13 provided on the valve body 11, and the valve flap 22 is slidably installed in the second step 14, wherein the size of the valve flap 22 is larger than the size of the valve head 21, and a water drainage channel 15 is provided on the second step 14, wherein the distance between the water drainage channel 15 and the first step 13 is smaller than the length of the valve flap 22, and when the valve core 2 is subjected to water When the pressure brought by the flow is small, the valve core 2 moves backwards. At this time, the valve head 21 is separated from the first step 13, but the valve disc 22 is still located in the second step 14, and the water flows out through the drain channel 15. In this state, the overall flow rate of the one-way valve is small. When the water flow pressure is large, the valve core 2 moves backwards, and the valve core 2 is subjected to a large pressure, so the movement distance is large. At this time, the valve head 21 is separated from the first step 13, and the valve disc 22 moves to the outside of the second step 14. The water can flow out through the drain channel 15 and the second step 14. In this state, the overall flow rate of the one-way valve is large. Therefore, the one-way valve can be applied to low-pressure or high-pressure circuits and has a wider range of applications.

[0021] The valve body 11 is provided with a water inlet 12 at one end close to the valve head 21, and a water outlet 17 at one end away from the valve head 21. The valve body 11 is provided with a valve cavity 16 for water to pass through. No matter the water flows out through the drain channel 15 or the second step 14, it is gathered in the valve cavity 16 and flows out through the water outlet 17. A valve seat 25 for cooperating with a valve disc 22 is installed in the valve cavity 16. The valve seat 25 is installed at one end of the valve cavity 16 away from the valve disc 22. A spring 27 is installed between the valve seat 25 and the valve disc 22. The spring 27 can make the valve disc 22 be located at the second step 14 under normal conditions. In the valve body, the valve head 21 is in contact with the first step 13 under normal conditions. When subjected to water flow pressure, the spring 27 can be compressed by its own elasticity to achieve the function of one-way water flow. A sleeve 23 is provided at one end of the valve flap 22 close to the valve seat 25. The sleeve 23 is coaxially arranged with the valve flap 22. A core shaft 24 is provided at one end of the valve seat 25 close to the valve flap 22. The valve seat 25 is coaxially arranged with the core shaft 24. The sleeve 23 is sleeved on the core shaft 24. The sleeve 23 and the core shaft 24 can be used to limit the movement trajectory of the valve flap 22 to prevent the valve flap 22 from deflecting. A through hole 26 for water to pass through is provided on the valve seat 25.

[0022] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-pressure one-way valve, comprising an outer valve body (1) and a valve core (2), wherein the valve core (2) is installed in the outer valve body (1), characterized in that: The outer valve body (1) comprises a valve body (11), and the valve body (11) is provided with a first step (13) and a second step (14). The valve core (2) comprises a valve head (21) and a valve flap (22) for cooperating with the first step (13) and the second step (14). The valve head (21) is in contact with the first step (13) provided on the valve body (11), and the valve flap (22) is slidably installed in the second step (14), and a water discharge channel (15) is provided on the second step (14).

2. A high pressure one-way valve according to claim 1, characterized in that: The end of the valve body (11) close to the valve head (21) is provided with a water inlet (12), and the end of the valve body (11) away from the valve head (21) is provided with a water outlet (17).

3. A high pressure one-way valve according to claim 2, characterized in that: The valve body (11) is provided with a valve cavity (16) for water to flow through.

4. A high pressure one-way valve according to claim 3, characterized in that: A valve seat (25) for cooperating with a valve flap (22) is installed in the valve cavity (16), and a spring (27) is installed between the valve seat (25) and the valve flap (22).

5. A high pressure one-way valve according to claim 4, characterized in that: A sleeve (23) is arranged at one end of the valve flap (22) close to the valve seat (25), a core shaft (24) is arranged at one end of the valve seat (25) close to the valve flap (22), and the sleeve (23) is sleeved on the core shaft (24).

6. A high pressure one-way valve according to claim 4, characterized in that: The valve seat (25) is provided with a through hole (26) for water to pass through.

Images