Large-drift-diameter pilot-operated type two-position three-way hydraulic valve
By setting multiple annular projections and threaded connections on the valve core of the hydraulic valve, the problem of limited flow of the miniaturized hydraulic valve is solved, and the rapid response and flow increase of the hydraulic system are achieved.
Patent Information
- Application Number
- CN202420928461.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-30
AI Technical Summary
During the miniaturization process, the flow rate of the pilot hydraulic valve is limited, resulting in slow response of the hydraulic system, and the pressure relief state cannot be achieved as soon as possible.
A large diameter pilot two-way hydraulic valve is designed. By setting multiple annular projections on the valve core, the space occupied by the valve core in the flow channel is reduced, the diameter of the flow channel is increased, and the threaded connection is connected. The sealing cap and induction cap enable removable connections to ensure rapid adjustment of liquid flow.
The internal flow of the hydraulic valve is increased, which meets the demand for rapid adjustment, while maintaining the pilot pressure at the pilot end, solving the problem of slow response.
Smart Images
Figure CN222163064U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic valves, and in particular to a large-diameter pilot-operated two-position three-way hydraulic valve. Background Art
[0002] A pilot hydraulic valve is a valve that uses a pilot valve to control the opening and closing of the main valve. It is usually used in situations where precise control of fluid pressure and flow is required. In a hydraulic system, a pilot hydraulic valve can be used to adjust system pressure, protect system safety, and control the action of actuators. The working principle of a pilot hydraulic valve is to control the opening and closing of the main valve by changing the opening degree of the pilot valve. When the pilot valve is partially opened, the main valve will also open accordingly to allow fluid to pass; when the pilot valve is completely closed, the main valve will also close and cut off the flow of fluid.
[0003] In actual applications, the demand for small hydraulic valves is increasing. However, the direct problem caused by the decrease in flow rate is that there is too much residual liquid in the pilot line that controls the switch of valve components in large equipment with long pipelines, and the pressure relief state cannot be achieved in the first time.
[0004] Therefore, a new pilot hydraulic valve is urgently needed to solve the above problems. Utility Model Content
[0005] The utility model provides a large-diameter pilot-operated two-position three-way hydraulic valve, which solves the problem that the hydraulic system responds slowly due to flow limitation in the miniaturization process of the existing pilot-operated hydraulic valve.
[0006] The technical scheme of the utility model is as follows: a large-diameter pilot-operated two-position three-way hydraulic valve comprises a valve body, a first valve core, a blocking cap and a sensing cap, the valve body is provided with a flow channel running through both sides of the valve body, the blocking cap is provided at one end of the flow channel, the sensing cap is provided at the other end of the flow channel, the first valve core is provided in the flow channel, the blocking cap has a first accommodating chamber, a return spring is provided in the first accommodating chamber, the sensing cap has a second accommodating chamber, a second valve core is provided in the second accommodating chamber, the flow channel is connected to the first accommodating chamber and the second accommodating chamber respectively, the second accommodating chamber has a liquid inlet, a liquid inlet hole and two liquid outlet holes are provided on the outer surface of the valve body, the liquid inlet hole and the liquid outlet hole are both connected to the flow channel, a protrusion is provided on the first valve core, the protrusion is provided with a sealing ring, the sealing ring is in full contact with the inner wall of the flow channel, and the first valve core reduces the space occupied in the flow channel by means of the protrusion.
[0007] As a further technical solution, the protrusions are multiple and divided into three groups, and the three groups of protrusions are arranged at the same distance.
[0008] As a further technical solution, the number of the protrusions in each group is two.
[0009] As a further technical solution, the cross section of the flow channel is circular, and the protrusions are all ring-shaped.
[0010] As a further technical solution, the first valve core and the protrusion are an integrated structure.
[0011] As a further technical solution, the blocking cap and the sensing cap are both detachably connected to the valve body in the form of threaded connection.
[0012] As a further technical solution, a vent hole is provided on the sealing cap, the vent hole is connected to the first accommodating chamber, and the axis of the vent hole passes through the center of the first accommodating chamber.
[0013] As a further technical solution, the outer surface of the valve body is a cylindrical surface.
[0014] The working principle and beneficial effects of the utility model are as follows: a large-diameter pilot-operated two-position three-way hydraulic valve comprises a valve body, a first valve core, a blocking cap and a sensing cap, a flow channel is arranged in the valve body, the flow channel runs through both ends of the valve body, the blocking cap is arranged at one end of the flow channel, the sensing cap is arranged at the other end of the valve body, the first valve core is arranged in the flow channel, the blocking cap has a first accommodating chamber, the first accommodating chamber is communicated with the flow channel, a return spring is arranged in the first accommodating chamber, one end of the return spring abuts on the end of the first valve core, and the other end abuts on the bottom inner wall of the first accommodating chamber, the sensing cap has a second accommodating chamber, the second accommodating chamber is communicated with the flow channel and a second valve core is arranged inside, the second valve core can contact the first valve core under the push of liquid, and push the first valve core to move along the length direction of the flow channel. A liquid inlet and two liquid outlets are arranged on the valve body, and the first valve core can realize the communication between the two liquid outlets and the liquid inlet respectively during the reciprocating movement, thereby realizing the main function of the two-position three-way hydraulic valve. Among them, in order to increase the internal flow of the hydraulic valve provided by the utility model, a protrusion is set on the first valve core, and the protrusion is in full contact with the inner wall of the flow channel, thereby isolating the flow channel into multiple non-interfering channels. Due to the setting of the protrusion, the space occupied by the first valve core in the flow channel is reduced, thereby increasing the flow of liquid flowing through the hydraulic valve, meeting the needs of rapid adjustment. Compared with other pilot-type three-way valves, the biggest optimization is that the valve diameter is increased without changing the pilot pressure of the pilot end. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0016] Figure 1 It is a schematic diagram of the structure of the utility model;
[0017] Figure 2 It is a structural schematic diagram of the valve body in the utility model;
[0018] Figure 3 It is a structural schematic diagram of the first valve core in the utility model.
[0019] In the figure: 1. valve body; 2. first valve core; 3. sealing cap; 4. sensing cap; 5. flow channel; 6. return spring; 7. second valve core; 8. liquid inlet hole; 9. liquid outlet hole; 10. protrusion; 11. exhaust hole. DETAILED DESCRIPTION
[0020] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] like Figure 1-2 As shown, this embodiment proposes a large-diameter pilot-operated two-position three-way hydraulic valve, including a valve body 1, a first valve core 2, a blocking cap 3 and a sensing cap 4. A flow channel 5 running through both sides of the valve body 1 is arranged in the valve body 1, the blocking cap 3 is arranged at one end of the flow channel 5, and the sensing cap 4 is arranged at the other end of the flow channel 5. The first valve core 2 is arranged in the flow channel 5, the blocking cap 3 has a first accommodating chamber, a reset spring 6 is arranged in the first accommodating chamber, the sensing cap 4 has a second accommodating chamber, a second valve core 7 is arranged in the second accommodating chamber, the flow channel 5 is connected to the first accommodating chamber and the second accommodating chamber respectively, the second accommodating chamber has a liquid inlet, a liquid inlet hole 8 and two liquid outlet holes 9 are arranged on the outer surface of the valve body 1, the liquid inlet hole 8 and the liquid outlet hole 9 are both connected to the flow channel 5, a protrusion 10 is arranged on the first valve core 2, a sealing ring is arranged on the protrusion 10, the sealing ring is in full contact with the inner wall of the flow channel 5, and the first valve core 2 reduces the space occupied in the flow channel 5 by means of the protrusion 10.
[0022] In this embodiment, the large-diameter pilot-operated two-position three-way hydraulic valve includes a valve body 1, a first valve core 2, a blocking cap 3 and a sensing cap 4. A flow channel 5 is arranged in the valve body 1, and the flow channel 5 runs through both ends of the valve body 1. The blocking cap 3 is arranged at one end of the flow channel 5, and the sensing cap 4 is arranged on the other end of the valve body 1. The first valve core 2 is penetrated in the flow channel 5, and the blocking cap 3 has a first accommodating chamber, which is communicated with the flow channel 5. A return spring 6 is arranged in the first accommodating chamber, and one end of the return spring 6 abuts on the end of the first valve core 2, and the other end abuts on the bottom inner wall of the first accommodating chamber. The sensing cap 4 has a second accommodating chamber, which is communicated with the flow channel 5 and has a second valve core 7 arranged therein. The second valve core 7 can contact the first valve core 2 under the push of the liquid and push the first valve core 2 to move along the length direction of the flow channel 5. The valve body 1 is provided with a liquid inlet hole 8 and two liquid outlet holes 9. The first valve core 2 can achieve the communication between the two liquid outlet holes 9 and the liquid inlet hole 8 respectively during the reciprocating movement, thereby realizing the main function of the two-position three-way hydraulic valve. Among them, in order to increase the internal flow of the hydraulic valve provided by the utility model, a protrusion 10 is provided on the first valve core 2. The protrusion 10 is in full contact with the inner wall of the flow channel 5, thereby realizing the isolation of the flow channel 5 into multiple non-interfering channels. Due to the setting of the protrusion 10, the space occupied by the first valve core 2 in the flow channel 5 is reduced, thereby increasing the flow of liquid flowing through the hydraulic valve, meeting the demand for rapid adjustment. The sealing ring and the protrusion 10 are set in a one-to-one correspondence.
[0023] Further, if Figure 1-2 As shown, this embodiment proposes that there are multiple protrusions 10 divided into three groups, and the three groups of protrusions 10 are arranged at the same distance.
[0024] In this embodiment, in order to further increase the available space in the flow channel 5, there are multiple protrusions 10, and the protrusions 10 are divided into three groups, and the distances between the three groups of protrusions 10 are equal. Since there are two liquid outlet holes 9, setting up three groups can not only meet the needs of users, but also reduce the space in the flow channel 5 occupied by the first valve body 1 and the protrusions 10 as much as possible.
[0025] Further, if Figure 1-2 As shown, this embodiment proposes that the number of protrusions 10 in each group is two.
[0026] In this embodiment, in order to improve the sealing performance, the number of each group of protrusions 10 is selected to be two, and there is a certain distance between the two protrusions 10, so that the liquid flowing through the hydraulic valve will not leak during the switching process. The cross section of the flow channel 5 is circular, and the protrusions 10 are all ring-shaped.
[0027] In a practical application, the distance between the two protrusions 10 in each group is 3 mm, and the length of the protrusion 10 is selected to be 1.4 to 3.1 mm. When the first valve core 2 is cylindrical (i.e., the cross section of the flow channel 5 is circular), the protrusion 10 is annular, and the ratio of the diameter of the first valve core 2 to the diameter of the annular protrusion 10 is 1:1.25 to 1:1.5.
[0028] Further, if Figure 1-2 As shown, this embodiment proposes that the first valve core 2 and the protrusion 10 are an integrated structure.
[0029] In this embodiment, in order to facilitate manufacturing and reduce production costs, the first valve core 2 and the protrusion 10 are configured as an integrated structure.
[0030] Further, if Figure 1-2 As shown, this embodiment proposes that both the blocking cap 3 and the sensing cap 4 are detachably connected to the valve body 1 in the form of threaded connection.
[0031] In this embodiment, the threaded connection is not only convenient for maintenance and replacement, but also, since a reset spring 6 is provided in the blocking cap 3, the positional relationship between the blocking cap 3 and the valve body 1 can be adjusted to thereby adjust the tension of the reset spring 6, which is convenient for the hydraulic valve to adapt to different triggering pressures.
[0032] Further, if Figure 1-2 As shown, this embodiment proposes that a vent hole 11 is opened on the sealing cap 3, the vent hole 11 is connected to the first accommodating cavity, and the axis of the vent hole 11 passes through the center of the first accommodating cavity.
[0033] In this embodiment, since the return spring 6 will be compressed, and thus the space in the blocking cap 3 will be compressed, if the gas in the first accommodating chamber cannot be discharged in time, the movement of the first valve body 1 will be blocked, therefore, an exhaust hole 11 is provided in the first accommodating chamber. In order to discharge the air smoothly, the exhaust hole 11 is provided at the center of the bottom of the first accommodating chamber.
[0034] Further, if Figure 1-2 As shown, this embodiment proposes that the outer surface of the valve body 1 is a cylindrical surface.
[0035] In this embodiment, in order to facilitate manufacturing and processing, the outer surface of the valve body 1 is set to be a cylindrical surface, that is, the valve body 1 is a cylinder.
[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A large-diameter pilot-operated two-position three-way hydraulic valve, characterized in that: The invention comprises a valve body (1), a first valve core (2), a blocking cap (3) and a sensing cap (4); the valve body (1) is provided with a flow channel (5) penetrating both sides of the valve body (1); the blocking cap (3) is arranged at one end of the flow channel (5); the sensing cap (4) is arranged at the other end of the flow channel (5); the first valve core (2) is arranged in the flow channel (5); the blocking cap (3) has a first accommodating chamber, in which a return spring (6) is arranged; the sensing cap (4) has a second accommodating chamber, in which a second valve core (7) is arranged ), the flow channel (5) is connected to the first accommodating chamber and the second accommodating chamber respectively, the second accommodating chamber has a liquid inlet, a liquid inlet hole (8) and two liquid outlet holes (9) are arranged on the outer surface of the valve body (1), the liquid inlet hole (8) and the liquid outlet holes (9) are both connected to the flow channel (5), a protrusion (10) is arranged on the first valve core (2), a sealing ring is arranged on the protrusion (10), the sealing ring is in full contact with the inner wall of the flow channel (5), and the first valve core (2) reduces the space occupied in the flow channel (5) by means of the protrusion (10).
2. A large-diameter pilot-operated two-position three-way hydraulic valve according to claim 1, characterized in that: The protrusions (10) are multiple and divided into three groups, and the three groups of protrusions (10) are arranged at the same distance.
3. A large-diameter pilot-operated two-position three-way hydraulic valve according to claim 2, characterized in that: The number of the protrusions (10) in each group is two.
4. A large-diameter pilot-operated two-position three-way hydraulic valve according to claim 3, characterized in that: The cross section of the flow channel (5) is circular, and the protrusions (10) are all ring-shaped.
5. A large-diameter pilot-operated two-position three-way hydraulic valve according to claim 4, characterized in that: The first valve core (2) and the protrusion (10) are an integrated structure.
6. A large-diameter pilot-operated two-position three-way hydraulic valve according to any one of claims 1 to 5, characterized in that: The blocking cap (3) and the sensing cap (4) are both detachably connected to the valve body (1) in the form of a threaded connection.
7. A large-diameter pilot-operated two-position three-way hydraulic valve according to any one of claims 1 to 5, characterized in that: The blocking cap (3) is provided with an exhaust hole (11), the exhaust hole (11) is connected to the first accommodating chamber, and the axis of the exhaust hole (11) passes through the center of the first accommodating chamber.
8. A large-diameter pilot-operated two-position three-way hydraulic valve according to any one of claims 1 to 5, characterized in that: The outer surface of the valve body (1) is a cylindrical surface.