Balanced differential valve group for telescopic oil cylinder
By designing a balanced differential valve group including a valve block body, a balance valve and a check valve, the problem of slow extension speed of the oil cylinder in the prior art is solved, and the stable extension and speed increase of the oil cylinder are achieved.
Patent Information
- Application Number
- CN202422186517.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-06
AI Technical Summary
The existing balance valves for telescopic cylinders cannot increase the extension speed of the cylinder and only have load stabilization function.
A balanced differential valve group is designed, including a valve block body, the first and second balance valves, a check valve and a throttling plug. The flow path of the hydraulic oil is increased through a specific connection method, ensuring that the flow rate of the hydraulic oil in the rodless cavity increases, thereby increasing the extension speed of the oil cylinder.
While ensuring the smooth extension of the oil cylinder, the extension speed of the telescopic oil cylinder is significantly improved, achieving a combination of load stability and the differential function of the oil cylinder.
Smart Images
Figure CN223062786U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of balance valves, and particularly to a balance differential valve group for telescopic oil cylinders. Background Art
[0002] A balance valve is a valve with a special function. There is nothing special about the valve itself, except for differences in its usage function and application scenarios. In some industries, due to a large pressure difference or flow difference of the medium (various flowable substances) in various parts of the pipeline or container, in order to reduce or balance this difference, a valve is installed between the corresponding pipelines or containers to adjust the relative balance of the pressures on both sides, or to achieve flow balance through a flow splitting method.
[0003] The existing balance valves used in telescopic oil cylinders only have the function of load stabilization, and they cannot increase the extension speed of the oil cylinder while ensuring the smooth extension of the oil cylinder. In view of this, this application provides a balance differential valve group for telescopic oil cylinders. Utility Model Content
[0004] To solve the above technical problems, this application provides a balance differential valve group for telescopic oil cylinders, including a valve block body. The valve block body is provided with a first oil port, a second oil port, a third oil port, and a fourth oil port. The valve block body is connected to an external reversing valve through the first oil port and the second oil port, and is connected to an external telescopic oil cylinder through the third oil port and the fourth oil port. Moreover, the third oil port is connected to the rodless cavity of the external telescopic oil cylinder, and the fourth oil port is connected to the rod cavity of the external telescopic oil cylinder. A first balance valve is connected between the first oil port and the third oil port, a first check valve is connected between the second oil port and the fourth oil port, and a second balance valve and a second check valve are connected in series between the fourth oil port and the third oil port.
[0005] In some embodiments, it further includes a first throttle plug. One end of the first throttle plug is communicated with the first oil port, and the other end of the first throttle plug is communicated with the second balance valve for injecting pilot oil into the second balance valve.
[0006] In some embodiments, it further includes a second throttle plug. One end of the second throttle plug is communicated with the second balance valve, and the other end of the second throttle plug is communicated with the first balance valve for injecting pilot oil into the first balance valve.
[0007] In some embodiments, both the first balance valve and the second balance valve are embedded in the valve block body.
[0008] In some embodiments, the first check valve, the second check valve, the first throttle plug, and the second throttle plug are all arranged inside the valve block body.
[0009] In some embodiments, the first balance valve is a 1CE90 balance valve.
[0010] In some embodiments, the second balance valve is a CWCG balance valve.
[0011] In some embodiments, both the first check valve and the second check valve are ILCV2000 - G38 check valves.
[0012] Compared with the prior art, for the balance differential valve group used on a telescopic oil cylinder provided in the present application, hydraulic oil enters the valve group from the first oil port through an external reversing valve and enters the rodless cavity of the external telescopic oil cylinder through the first balance valve and the third oil port. At this time, the hydraulic oil in the rod cavity of the external telescopic oil cylinder enters the valve group through the fourth oil port. Due to the presence of the first check valve, the hydraulic oil cannot return to the reversing valve through the second oil port. The hydraulic oil enters the rodless cavity of the external telescopic oil cylinder through the second balance valve, the second check valve, and the third oil port, thereby increasing the oil inlet flow rate of the rodless cavity of the telescopic oil cylinder, that is, increasing the extending speed of the telescopic oil cylinder. This makes the balance differential valve group not only have the load stabilizing function of a balance valve but also have the differential function of the oil cylinder, ensuring the smooth extension of the telescopic oil cylinder while increasing the extending speed of the oil cylinder. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] By reading the following detailed description of the embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing some embodiments and are not considered to be a limitation of the present application. And in all the drawings, the same reference numerals are used to represent the same components. In the drawings:
[0014] Figure 1 shows a schematic structural diagram of a balance differential valve group used on a telescopic oil cylinder provided in some embodiments of the present application,
[0015] Figure 2 shows a schematic connection diagram of each component in a balance differential valve group used on a telescopic oil cylinder provided in some embodiments of the present application.
[0016] The reference numerals in the specific embodiments are as follows:
[0017] 1. Valve block body, 11. First oil port, 12. Second oil port, 13. Third oil port, 14. Fourth oil port, 15. First balance valve, 16. First check valve, 17. Second balance valve, 18. Second check valve, 2. Reversing valve, 3. Telescopic oil cylinder, 4. First throttle plug, 5. Second throttle plug. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] For the convenience of understanding the structure and operation method of the present application, the present application will be described more comprehensively and carefully below in conjunction with the accompanying drawings of the specification and optimized embodiments. However, the protection scope of the present application is not limited to the following specific embodiments. It should be noted that without affecting the use effect, the structural features and component sizes in the embodiments of the present application can be changed, the connection methods can be substituted, and the device sizes can be changed.
[0019] Unless otherwise defined, all the professional terms used hereinafter have the same meaning as commonly understood by those skilled in the art. The terms "first", "second" and similar words used in the patent application specification and claims of the present application do not indicate any order, quantity or importance, but are only for the convenience of distinguishing the corresponding components. Similarly, words such as "a" or "one" do not indicate a quantity limitation, but indicate that there is at least one. The terms "connected" or "communicated" and similar words are not limited to direct connection, but can be indirectly connected through other intermediate connectors. The terms "above", "below", "one side", "the other side", "vertical", "horizontal" and the like are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship also changes accordingly.
[0020] It should be noted that in the embodiment of the present application, the differential principle of the telescopic oil cylinder means that when the oil inlet of the rodless cavity of the oil cylinder, because the effective area of the rodless cavity is larger than that of the rod cavity, the hydraulic oil in the rod cavity will flow to the rodless cavity, thereby increasing the extension speed of the oil cylinder and improving the working efficiency of the main machine.
[0021] Please refer to Figure 1 - Figure 2 As shown, a balance differential valve group for a telescopic oil cylinder provided in the embodiment of the present application includes a valve block body 1. The valve block body 1 is provided with a first oil port 11, a second oil port 12, a third oil port 13 and a fourth oil port 14. The valve block body 1 is connected to an external reversing valve 2 through the first oil port 11 and the second oil port 12. The valve block body 1 is connected to an external telescopic oil cylinder 3 through the third oil port 13 and the fourth oil port 14. The third oil port 13 is connected to the rodless cavity of the external telescopic oil cylinder 3, and the fourth oil port 14 is connected to the rod cavity of the external telescopic oil cylinder 3. A first balance valve 15 is connected between the first oil port 11 and the third oil port 13. A first one-way valve 16 is connected between the second oil port 12 and the fourth oil port 14. A second balance valve 17 and a second one-way valve 18 are connected in series between the fourth oil port 14 and the third oil port 13.
[0022] In the above embodiment, the first balance valve 15 is a 1CE90 balance valve, the second balance valve 17 is a CWCG balance valve, and the first one-way valve 16 and the second one-way valve 18 are both ILCV2000-G38 one-way valves.
[0023] In the above embodiments, when the external telescopic oil cylinder 3 needs to extend, the hydraulic oil in the external oil tank enters the valve group from the first oil port 11 through the external reversing valve 2, and enters the rodless cavity of the external telescopic oil cylinder 3 through the first balance valve 15 and the third oil port 13. At this time, the hydraulic oil in the rod chamber of the external telescopic oil cylinder 3 enters the valve group through the fourth oil port 14. Due to the existence of the first check valve 16, the hydraulic oil cannot return to the external reversing valve 2 through the second oil port 12, but enters the rodless cavity of the external telescopic oil cylinder 3 through the second balance valve 17 and the second check valve 18 from the third oil port 13, thereby increasing the oil inlet flow rate of the rodless cavity of the external telescopic oil cylinder 3, that is, increasing the extension speed of the external telescopic oil cylinder 3, so that the balanced differential valve group improves the extension speed of the telescopic oil cylinder 3 while ensuring the smooth extension of the telescopic oil cylinder 3; when the external telescopic oil cylinder 3 needs to retract, the hydraulic oil in the external oil tank enters the valve group from the second oil port 12 after being reversed by the external reversing valve 2, enters the rod chamber of the external telescopic oil cylinder 3 through the first check valve 16 and the fourth oil port 14, and the hydraulic oil in the rodless cavity of the external telescopic oil cylinder 3 enters the valve group through the third oil port 13 and returns to the external reversing valve 2 through the first balance valve 15 and the first oil port 11, thereby realizing the retraction action of the external telescopic oil cylinder 3. Therefore, the balanced differential valve group not only has the load stabilizing function of a balance valve, but also has the function of cylinder differential.
[0024] In some embodiments, it further includes a first throttle plug 4. One end of the first throttle plug 4 is communicated with the first oil port 11, and the other end of the first throttle plug 4 is communicated with the second balance valve 17 for injecting pilot oil into the second balance valve 17. It further includes a second throttle plug 5. One end of the second throttle plug 5 is communicated with the second balance valve 17, and the other end of the second throttle plug 5 is communicated with the first balance valve 15 for injecting pilot oil into the first balance valve 15.
[0025] In the above embodiments, by providing the first throttle plug 4 and the second throttle plug 5, pilot oil can be injected before the first balance valve 15 and the second balance valve 17 work, thereby ensuring the stability of the working process of the first balance valve 15 and the second balance valve 17.
[0026] In some embodiments, both the first balance valve 15 and the second balance valve 17 are embedded in the valve block body 1.
[0027] In the above embodiments, embedding the first balance valve 15 and the second balance valve 17 in the valve block body 1 can not only ensure the stable installation of the two balance valves on the valve block body 1, but also facilitate the observation during the operation process and the disassembly, assembly and maintenance in the later stage.
[0028] In some embodiments, the first check valve 16, the second check valve 18, the first throttle plug 4 and the second throttle plug 5 are all arranged inside the valve block body 1.
[0029] In the above embodiments, the first one-way valve 16, the second one-way valve 18, the first throttle plug 4, and the second throttle plug 5 are arranged inside the valve block body 1, which can effectively prevent external dust from entering the components, causing medium pollution or corrosion of the components.
[0030] The above has introduced in detail a balance differential valve group for a telescopic oil cylinder provided by the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the core idea of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and modifications can still be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.
Claims
1. A balance differential valve group for a telescopic oil cylinder, characterized in that, It includes a valve block body (1). A first oil port (11), a second oil port (12), a third oil port (13) and a fourth oil port (14) are opened on the valve block body (1). The valve block body (1) is connected to an external reversing valve (2) through the first oil port (11) and the second oil port (12). The valve block body (1) is connected to an external telescopic oil cylinder (3) through the third oil port (13) and the fourth oil port (14). The third oil port (13) is connected to the rodless cavity of the external telescopic oil cylinder (3), and the fourth oil port (14) is connected to the rod cavity of the external telescopic oil cylinder (3). A first balance valve (15) is connected between the first oil port (11) and the third oil port (13), and a first one-way valve (16) is connected between the second oil port (12) and the fourth oil port (14). A second balance valve (17) and a second one-way valve (18) are connected in series between the fourth oil port (14) and the third oil port (13).
2. The balanced differential valve group for a telescopic oil cylinder according to claim 1, characterized in that, It further includes a first throttle plug (4). One end of the first throttle plug (4) is communicated with the first oil port (11), and the other end of the first throttle plug (4) is communicated with the second balance valve (17) for injecting pilot oil into the second balance valve (17).
3. The balanced differential valve group for a telescopic oil cylinder according to claim 2, characterized in that, It further includes a second throttle plug (5). One end of the second throttle plug (5) is communicated with the second balance valve (17), and the other end of the second throttle plug (5) is communicated with the first balance valve (15) for injecting pilot oil into the first balance valve (15).
4. The balance differential valve group for a telescopic oil cylinder according to claim 1, characterized in that, The first balance valve (15) and the second balance valve (17) are both embedded in the valve block body (1).
5. The balance differential valve group for a telescopic oil cylinder according to claim 3, characterized in that, The first one-way valve (16), the second one-way valve (18), the first throttle plug (4) and the second throttle plug (5) are all arranged inside the valve block body (1).
6. The balance differential valve group for a telescopic oil cylinder according to claim 1, wherein, The first balance valve (15) is a 1CE90 balance valve.
7. The balance differential valve group for a telescopic oil cylinder according to claim 1, characterized in that, The second balance valve (17) is a CWCG balance valve.
8. The balance differential valve group for the telescopic oil cylinder according to claim 1, characterized in that, The first one-way valve (16) and the second one-way valve (18) are both ILCV2000-G38 one-way valves.