Pressure flow control valve based on valve core improvement
By setting a flushing oil channel on the load-sensitive valve core of the pressure flow control valve, the impurity accumulation problem caused by the lack of flushing function of the valve core in the prior art is solved, and higher oil quality and adjustment accuracy are achieved.
Patent Information
- Application Number
- CN202420059642.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-10
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-01-10
AI Technical Summary
The load-sensitive valve core in existing pressure flow control valves lacks flushing oil channels, causing impurities accumulated by the oil in the valve to affect the performance and accuracy of the valve.
A pressure flow control valve based on the valve core is designed. By setting a flushing oil channel on the load-sensitive valve core, the flushing function of the valve core is realized to clean impurities in the oil.
It improves the oil quality and control valve adjustment accuracy, and avoids the impact of impurities accumulation on the valve core performance.
Smart Images
Figure CN222334133U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic control valves, in particular to a pressure flow control valve based on an improved valve core. Background Art
[0002] With the development of hydraulic technology, the control demand and requirements of hydraulic systems for pumps are increasing. Most existing pressure flow control valves do not have flushing oil channels on the load-sensitive valve cores. Over time, when a certain amount of impurities accumulate in the oil in the control valve, it will not only affect the performance of the control valve, but also the accuracy of the control valve. Summary of the invention
[0003] In view of this, the utility model provides a pressure flow control valve based on an improved valve core.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0005] A pressure flow control valve based on valve core improvement, comprising a valve body arranged on a plunger pump, the plunger pump and the valve body being connected, a first valve hole and a second valve hole being arranged in the valve body, a load-sensitive valve core and a pressure cut-off valve core being arranged in the first valve hole and the second valve hole respectively, a connecting oil passage connecting the first valve hole and the second valve hole being arranged on the valve body, the connecting oil passage having a valve body B port connected to the plunger pump, a flushing cavity being formed between the load-sensitive valve core and the first valve hole, a flushing oil passage being arranged on the load-sensitive valve core, and two ends of the flushing oil passage being connected to the flushing cavity and the connecting oil passage respectively.
[0006] Preferably, a first elastic adjustment component is disposed on one side of the load-sensitive valve core, and a second elastic adjustment component is disposed on one side of the pressure cut-off valve core, and the first elastic adjustment component and the second elastic adjustment component are the same.
[0007] Preferably, the first elastic adjustment component includes a first adjustment rod sleeve, a first spring and a first adjustment rod, a first connecting groove is provided on a side of the first valve hole close to the first elastic adjustment component, one end of the first adjusting rod sleeve extends into the first connecting groove and is connected to the valve body, the first spring and the first adjusting rod are both arranged inside the first adjusting rod sleeve, a first spring seat and a second spring seat are provided at both ends of the first spring, the first spring seat and the second spring seat respectively abut against the load-sensitive valve core and the first adjustment rod at one end away from the first spring, the first adjusting rod extends out of the first adjusting rod sleeve at one end away from the first spring, and a nut is fixed to the end of the first adjusting rod extending out of the first adjusting rod sleeve.
[0008] Preferably, the second elastic adjustment component includes a second adjustment rod sleeve, a second spring and a second adjustment rod, a second connecting groove is provided on a side of the second valve hole close to the second elastic adjustment component, one end of the second adjusting rod sleeve extends into the second connecting groove and is connected to the valve body, the second spring and the second adjusting rod are both arranged inside the second adjusting rod sleeve, a third spring seat and a fourth spring seat are provided at both ends of the second spring, the third spring seat and the fourth spring seat respectively resist the pressure cut-off valve core and the second adjustment rod at one end away from the second spring, the second adjusting rod extends out of the second adjusting rod sleeve at one end away from the second spring, and a nut is fixed to the end of the second adjusting rod extending out of the second adjusting rod sleeve.
[0009] Preferably, the load-sensitive valve core and the pressure-cut-off valve core are respectively provided with a first conical end and a second conical end, and the first elastic adjustment component and the second elastic adjustment component are provided with corresponding conical grooves corresponding to the first conical end and the second conical end, and the first conical end and the second conical end are respectively extended into the corresponding conical grooves and connected with the first elastic adjustment component and the second elastic adjustment component.
[0010] Preferably, the valve body is provided with a first screw plug and a second screw plug for sealing the first valve hole and the second valve hole.
[0011] The beneficial effect of the utility model is that the flushing function is realized by machining the flushing oil channel at the radial position of the load-sensitive valve core, so that impurities and other pollutants accumulated on the valve through the oil on the pressure flow control valve can be flushed, thereby improving the oil quality and the accuracy of the control valve adjustment. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0013] Attached Figure 1 It is a schematic diagram of the structure of the utility model. DETAILED DESCRIPTION
[0014] The following will be combined with the drawings in 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 in 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.
[0015] The utility model will be further described below in conjunction with the accompanying drawings of the specification.
[0016] The utility model provides the following technical solutions:
[0017] As attached Figure 1 As shown, the utility model discloses a pressure flow control valve based on a valve core improvement, including a valve body 22 arranged on a plunger pump 1, the plunger pump 1 and the valve body 22 are connected, a first valve hole 25 and a second valve hole 26 are arranged in the valve body 22, a load-sensitive valve core 20 and a pressure cut-off valve core 6 are respectively arranged in the first valve hole 25 and the second valve hole 26, a connecting oil passage connecting the first valve hole 25 and the second valve hole 26 is opened on the valve body, the connecting oil passage has a valve body B port 24 connected to the plunger pump 1, a flushing cavity 9 is formed between the load-sensitive valve core 20 and the first valve hole 25, a flushing oil passage is opened on the load-sensitive valve core 20, and both ends of the flushing oil passage are respectively connected to the flushing cavity 9 and the connecting oil passage. Specifically, in the present design, the flushing chamber 9 between the load-sensitive valve core 20 and the first valve hole 25 includes a first flushing chamber 29 and a second flushing chamber 30, and the flushing oil passage includes a first flushing oil passage 181 and a second flushing oil passage 182 corresponding to the first flushing chamber 29 and the second flushing chamber 30. When the plunger pump 1 is working, the high-pressure oil enters the valve body 22 through the high-pressure oil port 2 and the valve body B port 24, and enters the second valve hole 26. The high-pressure oil acts on the left end face of the pressure cut-off valve core 6. When the pressure on the left end face is greater than the pressure of the second spring 8 on the right end, the pressure cut-off valve core 6 moves to the right, and the high-pressure oil passes through the valve body K port 23 and then through the oil port 3 into the variable control chamber of the plunger pump to control the swing angle of the cradle and realize the function of pressure cut-off. The load-sensitive valve core 20 is provided with flushing oil passages 181 and 182. High-pressure oil acts on the left end face of the load-sensitive valve core 20. When the pressure on the left end face of the load-sensitive valve core 20 is greater than the pressure of the first spring 17 at the right end, the load-sensitive valve core 20 moves to the right, connecting the valve body B port 24 with the valve body K port 23. The high-pressure oil passes through the valve body K port 23 and then through the oil port 3 into the variable control chamber of the plunger pump to control the angle change of the cradle until the outlet flow of the plunger pump 1 reaches stability. When the plunger pump 1 is working, the flushing oil passages 181 and 182 on the load-sensitive valve core 20 can flush the oil in the flushing chamber 99 to prevent oil impurities from accumulating in the flushing chamber 9.
[0018] Furthermore, a first elastic adjustment component is provided on one side of the load-sensitive valve core 20, and a second elastic adjustment component is provided on one side of the pressure cut-off valve core 6, and the first elastic adjustment component and the second elastic adjustment component are the same. Specifically, in this embodiment, by providing the first elastic adjustment component and the second elastic adjustment component corresponding to the load-sensitive valve core 20 and the pressure cut-off valve core 6, the oil pressure in the first valve hole 25 and the second valve hole 26 can be adjusted, thereby avoiding low flow control accuracy caused by excessive or insufficient oil pressure.
[0019] Furthermore, the first elastic adjustment component connected to the end of the load-sensitive valve core 20 away from the screw plug 21 includes a first spring seat 17, a first spring 16 is connected to the first spring seat 17, and the other end of the first spring 16 is connected to the second spring seat 15; the first spring 16 and the second spring seat 15 are connected in the first adjusting rod sleeve 14; the first adjusting rod sleeve 14 is connected with the first adjusting rod 13, and the side away from the valve body 22 is connected with the first nut 12; the first adjusting rod 13 is in contact with the second spring seat 15 on the side close to the valve body 22. The second elastic adjustment component connected to the side of the pressure cut-off valve core 6 away from the screw plug 21 includes a third spring seat 7; the other end of the third spring seat 7 is connected to a second spring 8, and the end of the second spring 8 away from the third spring seat 7 is connected to a fourth spring seat 10; the second spring 8 and the fourth spring seat 10 are connected in a second adjustment rod sleeve 27; the second adjustment rod sleeve 27 is connected with a second adjustment rod 11, and at the same time, the side away from the valve body 22 is connected with a second nut 28; the second adjustment rod 11 is in contact with the fourth spring seat 10 on the side close to the valve body 22.
[0020] Furthermore, the load-sensitive valve core 20 and the pressure cut-off valve core 6 are respectively provided with a first conical end 34 and a second conical end 31, and the first elastic adjustment component and the second elastic adjustment component are provided with corresponding first conical grooves 33 and second conical grooves 32 corresponding to the first conical end 34 and the second conical end 31, and the first conical end 34 and the second conical end 31 are respectively extended into the corresponding conical grooves to connect with the first elastic adjustment component and the second elastic adjustment component.
[0021] Furthermore, the valve body is provided with a first screw plug 21 and a second screw plug 35 for blocking the first valve hole 25 and the second valve hole 26 .
[0022] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A pressure flow control valve based on valve core improvement, characterized in that: It includes a valve body arranged on a plunger pump, the plunger pump and the valve body are connected, a first valve hole and a second valve hole are arranged in the valve body, a load-sensitive valve core and a pressure cut-off valve core are respectively arranged in the first valve hole and the second valve hole, a connecting oil passage connecting the first valve hole and the second valve hole is opened on the valve body, the connecting oil passage has a valve body B port connected to the plunger pump, a flushing cavity is formed between the load-sensitive valve core and the first valve hole, a flushing oil passage is opened on the load-sensitive valve core, and both ends of the flushing oil passage are respectively connected to the flushing cavity and the connecting oil passage.
2. The pressure flow control valve based on valve core improvement according to claim 1 is characterized in that: A first elastic adjustment component is disposed on one side of the load-sensitive valve core, and a second elastic adjustment component is disposed on one side of the pressure cut-off valve core. The first elastic adjustment component and the second elastic adjustment component are the same.
3. The pressure flow control valve based on valve core improvement according to claim 2 is characterized in that: The first elastic adjustment component includes a first adjustment rod sleeve, a first spring and a first adjustment rod. A first connecting groove is arranged on a side of the first valve hole close to the first elastic adjustment component. One end of the first adjusting rod sleeve extends into the first connecting groove and is connected to the valve body. The first spring and the first adjustment rod are both arranged inside the first adjusting rod sleeve. A first spring seat and a second spring seat are arranged at both ends of the first spring. The first spring seat and the second spring seat respectively abut against the load-sensitive valve core and the first adjustment rod at one end away from the first spring. The first adjusting rod extends out of the first adjusting rod sleeve at one end away from the first spring, and a nut is fixed to the end of the first adjusting rod extending out of the first adjusting rod sleeve.
4. The pressure flow control valve based on valve core improvement according to claim 3 is characterized in that: The second elastic adjustment component includes a second adjustment rod sleeve, a second spring and a second adjustment rod. A second connecting groove is arranged on a side of the second valve hole close to the second elastic adjustment component. One end of the second adjusting rod sleeve extends into the second connecting groove and is connected to the valve body. The second spring and the second adjusting rod are both arranged inside the second adjusting rod sleeve. A third spring seat and a fourth spring seat are arranged at both ends of the second spring. The third spring seat and the fourth spring seat respectively resist the pressure cut-off valve core and the second adjustment rod at one end away from the second spring. The second adjusting rod extends out of the second adjusting rod sleeve at one end away from the second spring, and a nut is fixed on the end of the second adjusting rod extending out of the second adjusting rod sleeve.
5. The pressure flow control valve based on valve core improvement according to claim 2 is characterized in that: The load-sensitive valve core and the pressure-cut-off valve core are respectively provided with a first conical end and a second conical end, and the first elastic adjustment component and the second elastic adjustment component are provided with corresponding conical grooves corresponding to the first conical end and the second conical end, and the first conical end and the second conical end are respectively extended into the corresponding conical grooves to connect with the first elastic adjustment component and the second elastic adjustment component.
6. The pressure flow control valve based on valve core improvement according to claim 1, characterized in that: The valve body is provided with a first screw plug and a second screw plug for sealing the first valve hole and the second valve hole.