Hydraulic balance valve
By incorporating a positioning shoulder and adjusting rod in the hydraulic balance valve, the problems of large adjusting torque and jamming caused by direct contact between the adjusting rod and the cone valve core are solved, enabling easy fine-tuning and high-precision pressure regulation.
Patent Information
- Application Number
- CN202423225237.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-26
AI Technical Summary
In existing hydraulic balance valves, the adjusting rod is in direct contact with the cone valve core, resulting in a large adjusting torque, making fine adjustment difficult. Furthermore, the adjusting rod may wear out or become stuck, affecting the pressure regulation sensitivity and accuracy.
By setting a positioning shoulder on the cone valve core, axial limiting is achieved, and the adjusting rod is only partially connected to the pressure regulating spring to avoid the adjusting rod being affected by the load port pressure, thus ensuring the stable operation of the cone valve core.
The reduced adjustment torque enables easy fine-tuning, prevents the adjustment lever from jamming, and improves pressure regulation sensitivity and pressure setting accuracy.
Smart Images
Figure CN223459635U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to hydraulic valve technical field, concretely is a kind of hydraulic balance valve. BACKGROUND
[0002] CB series balance valve adjusting rod end face and cone valve core end face directly contact, limit the displacement of cone valve core, the load port hydraulic pressure that cone valve core receives is completely transmitted to adjusting rod, the axial contact force between adjusting rod and valve sleeve is very big, when load port pressure increases, adjusting rod adjusting torque sharply increases, it is difficult to realize small amplitude fine adjustment, after adjusting rod wear, larger axial force can even crush adjusting rod, lead to adjusting rod failure, in addition, since adjusting rod directly contact cone valve core, when screwing adjusting rod, it can drive cone valve core to rotate or skew, damage the seal between cone valve core and spool core, valve port opens prematurely, interfere with pressure regulating sensitivity to lead to unable accurate pressure setting, to improve the practicability of device, we propose a kind of hydraulic balance valve. SUMMARY
[0003] In view of the deficiencies of the prior art, the utility model provides a kind of hydraulic balance valve, by setting the location shoulder, realize the axial location of cone valve core, so that adjusting rod axial stress is unrelated to the size of load port pressure, reduce adjusting torque, easy to fine pressure operation, adjusting rod is avoided to be stuck simultaneously;Adjusting rod is only partially connected with pressure regulating spring cover, so that adjusting rod is only subjected to the pressure of oil return port on the left end, so that the cone valve core is separated from the adjusting rod, and the adjusting rod is avoided to interfere with the cone valve core during pressure regulating, the action of spool core is stable and reliable, the pressure regulating sensitivity is improved, the pressure setting accuracy is improved, and the problems in the background are solved.
[0004] To achieve the above object, the utility model is realized by the following technical scheme:
[0005] A kind of hydraulic balance valve, including valve sleeve, the cone valve core is slidably sleeved on the valve sleeve, the location shoulder is arranged on the cone valve core, the positioning slot is opened on the valve sleeve, the location shoulder and the positioning slot are matched with each other, the adjusting rod is installed on the right side of the valve sleeve, and the fluid passage is formed between the cone valve core and the valve sleeve.
[0006] Preferably, the left port of the valve sleeve is provided with a load port, and the side of the valve sleeve is provided with a plurality of oil return ports.
[0007] Preferably, the valve body is fixedly sleeved on the right side of the valve sleeve, a plurality of cooperation sealing rings are sleeved between the valve body and the valve sleeve, the adjusting rod is slidably installed on the right side of the valve body, and the second sealing ring is sleeved between the adjusting rod and the valve body.
[0008] Preferably, the sliding sleeve in the valve sleeve is sleeved with a slide valve core, a plurality of connecting sealing rings are sleeved between the slide valve core and the valve sleeve, the slide valve core is in sliding connection with the cone valve core, a one-way valve spring is arranged in the slide valve core, and the right side of the one-way valve spring is in close contact with the cone valve core.
[0009] Preferably, the valve body is provided with a pressure regulating spring, the left side of the pressure regulating spring is in close contact with the slide valve core, and the right side of the pressure regulating spring is partially sleeved with the adjusting rod sleeve.
[0010] Preferably, the valve body is provided with a pilot port, and the outer surface of the valve body is sleeved with a plurality of mounting sealing rings.
[0011] Beneficial effects
[0012] The utility model provides a kind of hydraulic balance valve.Compared with prior art, it has the following beneficial effects:
[0013] 1, the hydraulic balance valve, by setting positioning shoulder, realize the axial location of cone valve core, so that adjusting rod axial stress is independent of load port pressure, reduce adjusting torque, easy to fine pressure operation, while avoiding adjusting rod jam.
[0014] 2, the hydraulic balance valve, by adjusting rod only part is sleeved with pressure regulating spring, adjusting rod is only subjected to the pressure of oil return port on left end, so that the cone valve core is separated from adjusting rod, and adjusting rod action interference cone valve core is avoided during pressure regulating, and the action of valve core is stable and reliable, improves pressure regulating sensitivity, and improves pressure setting accuracy. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is overall section schematic view of the utility model;
[0016] Figure 2 It is valve sleeve structure schematic view of the utility model;
[0017] Figure 3 It is overflow, liquid control throttling working condition schematic view of the utility model;
[0018] Figure 4 It is reverse free flow schematic view of the utility model;
[0019] Figure 5 It is original mechanism section schematic view of the utility model.
[0020] In the drawing: 1, cone valve core;2, valve sleeve;3, slide valve core;4, one-way valve spring;5, pressure regulating spring;6, valve body;7, adjusting rod;8, positioning shoulder;9, load port;10, oil return port;11, pilot port;12, fluid passage. DETAILED DESCRIPTION
[0021] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of the utility model protection.
[0022] Please refer to Figures 1-5 The utility model provides a technical scheme: a kind of hydraulic balance valve, including valve sleeve 2, conical valve element 1 is slidably sleeved on valve sleeve 2, and positioning shoulder 8 is arranged on conical valve element 1, positioning slot is opened in valve sleeve 2, positioning shoulder 8 and positioning slot are mutually matched, and adjusting rod 7 is installed on the right side of valve sleeve 2;When using, positioning shoulder 8 can realize the axial location of conical valve element 1, so that the axial stress of adjusting rod 7 is independent of the size of load port pressure, and the adjusting torque is reduced.
[0023] Load port 9 is arranged on the left side port of valve sleeve 2, and a plurality of oil return ports 10 are arranged on the side of valve sleeve 2, and a first sealing ring is sleeved on the outer surface of valve sleeve 2;The sealing ring can increase the sealing property of the device.
[0024] Valve body 6 is fixedly sleeved on the right side of valve sleeve 2, a plurality of matching sealing rings are sleeved between valve body 6 and valve sleeve 2, adjusting rod 7 is slidably installed on the right side of valve body 6, a second sealing ring is sleeved between adjusting rod 7 and valve body 6, spool valve element 3 is slidably sleeved in valve sleeve 2, a plurality of mounting sealing rings are sleeved between spool valve element 3 and valve sleeve 2, conical valve element 1 is slidably connected with spool valve element 3, one-way valve spring 4 is arranged in spool valve element 3, and the right side of one-way valve spring 4 is in close contact with conical valve element 1;Pressure regulating spring 5 is arranged in valve body 6, the left side of pressure regulating spring 5 is in close contact with spool valve element 3, and the right side part of pressure regulating spring 5 is sleeved with adjusting rod 7;When using, because the right side part of pressure regulating spring 5 is sleeved with adjusting rod 7, so that adjusting rod 7 is only subjected to the pressure of oil return port 10 acting on the left end, so that conical valve element 1 is separated from adjusting rod 7, and the action of adjusting rod 7 does not interfere with conical valve element 1 during pressure regulation, the valve element 1 acts stably and reliably, and the pressure regulating sensitivity is improved.
[0025] Pilot port 11 is arranged on valve body 6, and a plurality of mounting sealing rings are sleeved on the outer surface of valve body 6.
[0026] Working principle: the balance valve has three working conditions, which are overflow, hydraulic control throttling and one-way free flow. The patent aims to improve the pressure regulating process in the overflow condition and the hydraulic control throttling condition.
[0027] When overflowing and hydraulic control throttling, load port 9 enters oil (such as Figure 3 ), the pressure of pilot port 11 can assist opening, and the pressure oil acts on the left side of conical valve element 1, and passes through fluid passage 12 ( Figure 2) into the left side of the spool valve core 3. The conical valve core 1 is limited by the positioning shoulder 8 (at Figure 1 , a) and the compression of the pressure regulating spring 5 can be adjusted to change the valve opening pressure. During the adjustment process, the conical valve core 1 and the spool valve core 3 are stable, the adjustment rod 7 is easy to operate and has high control accuracy.
[0028] When the oil flows freely in one direction, the oil inlet 10 (as shown in Figure 4 ), the pressure oil enters the right side of the conical valve core 1 and the spool valve core 3, and the spool valve core 3 is limited by the valve sleeve 2 at Figure 4 b), when the pressure acting on the right end surface of the conical valve core 1 exceeds the pre-tightening force of the one-way valve spring 4, the conical valve core 1 moves to the left, the valve port is opened, and the oil flows from the oil return port 10 to the load port 9.
[0029] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or action from another entity or action, without necessarily requiring or implying any such actual relationship or order between these entities or actions. Moreover, the terms "comprises", "comprising" or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed or inherent to such a process, method, article or apparatus.
[0030] Although the embodiments of the present application have been shown and described, it is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A hydraulic counterbalance valve comprising a valve housing (2), characterized in that: The valve sleeve (2) is sleeved with a conical valve core (1) on the left side, the conical valve core (1) is provided with a positioning shoulder (8), the valve sleeve (2) is provided with a positioning notch, the positioning shoulder (8) and the positioning notch are matched with each other, the valve sleeve (2) is provided with an adjusting rod (7) on the right side, and the conical valve core (1) and the valve sleeve (2) form a fluid channel (12).
2. A hydraulic balance valve according to claim 1, characterized in that: The valve sleeve (2) is provided with a load port (9) on the left side, the side of the valve sleeve (2) is provided with a plurality of oil return ports (10), and the outer surface of the valve sleeve (2) is sleeved with a first sealing ring.
3. A hydraulic balance valve according to claim 2, characterised in that: The valve sleeve (2) is provided with a valve body (6) on the right side, the valve body (6) and the valve sleeve (2) are sleeved with a plurality of matched sealing rings, the adjusting rod (7) is slidably arranged on the right side of the valve body (6), and the adjusting rod (7) and the valve body (6) are sleeved with a second sealing ring.
4. A hydraulic balance valve according to claim 3, characterised in that: The valve sleeve (2) is sleeved with a slide valve core (3) on the left side, the slide valve core (3) and the valve sleeve (2) are sleeved with a plurality of connecting sealing rings, the conical valve core (1) and the slide valve core (3) are slidably connected, the slide valve core (3) is provided with a one-way valve spring (4), and the right side of the one-way valve spring (4) is in close contact with the conical valve core (1).
5. A hydraulic balance valve according to claim 4, characterised in that: The valve body (6) is provided with a pressure regulating spring (5), the left side of the pressure regulating spring (5) is in close contact with the slide valve core (3), and the right side of the pressure regulating spring (5) is sleeved with the adjusting rod (7).
6. A hydraulic balance valve according to claim 5, characterised in that: The valve body (6) is provided with a pilot port (11), and the outer surface of the valve body (6) is sleeved with a plurality of mounting sealing rings.