Plug-in type proportional overflow valve group

Abstract

The utility model discloses a plug-in mounting type proportional overflow valve group, which comprises a valve block, a shuttle valve and an anti-explosion proportional overflow valve, an oil return opening, a first working oil opening and a second working oil opening are formed in the valve block, the oil return opening is connected with an external oil tank, and the first working oil opening and the second working oil opening are connected with the two ends of an external oil cylinder respectively. According to the utility model, not only can the stability of moving parts during oil return be improved, but also the overload of a system can be prevented, so that the pressure of the system is not increased any more; due to the plug-in mounting type design, it is guaranteed that the structure is compact, the size is small, and the occupied space is small, so that the valve set is more convenient to mount, repair or clean. In addition, due to the adoption of the anti-explosion proportional overflow valve, hazardous gas or dust in the environment cannot be ignited during working or failure, so that explosion is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve group technical field, especially a kind of plug-in proportional overflow valve group. BACKGROUND

[0002] In prior art, ordinary plate valve is generally used in plug-in proportional overflow valve group on market, oil leakage is prone to occur in use process, affect long-time use;And valve group design volume is big, quality is heavy, increase material cost, and affect appearance. SUMMARY

[0003] According to the utility model embodiment, provide a kind of plug-in proportional overflow valve group, include: valve block, shuttle valve and explosion-proof proportional overflow valve;

[0004] Oil return port, first working oil port and second working oil port are opened on valve block, oil return port is connected with the oil tank outside, and the first working oil port and the second working oil port are connected with the two ends of the oil cylinder outside respectively;

[0005] Shuttle valve is arranged on the side of valve block, and the two oil inlets of shuttle valve are connected with the first working oil port and the second working oil port respectively;

[0006] Explosion-proof proportional overflow valve is inserted in the side of valve block, and the two ends of explosion-proof proportional overflow valve are connected with oil return port and the oil outlet of shuttle valve respectively.

[0007] Further, spare oil port is also opened on valve block, and spare oil port is connected with the output end of explosion-proof proportional overflow valve and is connected with oil tank.

[0008] Further, it further includes: pressure measuring port, pressure measuring port is opened on valve block, pressure measuring port is connected with the oil outlet of shuttle valve, and pressure measuring port is connected with the pressure gauge outside.

[0009] Further, it further includes: plug, plug cover is arranged on pressure measuring port.

[0010] Further, valve block is cuboid.

[0011] Further, the material of valve block is 45 steel.

[0012] Further, a plurality of mounting holes are also opened on valve block.

[0013] According to the plug-in proportional overflow valve group of the utility model embodiment, not only the stability of moving part when returning oil can be increased, but also system overload can be prevented, so that system pressure is no longer increased;And the design of plug-in ensures compact structure, small volume and small space occupation, so that the valve group becomes more convenient when installing, repairing or cleaning.In addition, the explosion-proof proportional overflow valve is used, which will not cause dangerous gas or dust in the environment to ignite when working or failing, thereby effectively preventing explosion.

[0014] It is to be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further explanation of the subject technology claimed. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 Front view of plug-in type proportional relief valve group according to the embodiment of the present application;

[0016] Fig. 2 Left view of plug-in type proportional relief valve group according to the embodiment of the present application;

[0017] Fig. 3 Right view of plug-in type proportional relief valve group according to the embodiment of the present application;

[0018] Fig. 4 Rear view of plug-in type proportional relief valve group according to the embodiment of the present application;

[0019] Fig. 5 Top view of plug-in type proportional relief valve group according to the embodiment of the present application;

[0020] Fig. 6 Hydraulic principle diagram of plug-in type proportional relief valve group according to the embodiment of the present application. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings, which further illustrate the present application.

[0022] Firstly, the plug-in type proportional relief valve group according to the embodiment of the present application will be described in combination with Fig. 1~6 The plug-in type proportional relief valve group according to the embodiment of the present application is used in a hydraulic system, and has a wide application scenario.

[0023] As shown in Fig. 1~6 the embodiment of the present application, the plug-in type proportional relief valve group comprises a valve block 1, a shuttle valve 2 and an explosion-proof proportional relief valve 3.

[0024] Specifically, as shown in Fig. 1~6 the embodiment, the valve block 1 is provided with a return oil port T, a first working oil port A and a second working oil port B, the return oil port T is connected with an external oil tank, and the first working oil port A and the second working oil port B are respectively connected with two ends of an external oil cylinder; the shuttle valve 2 is arranged on the side surface of the valve block 1, two oil inlets of the shuttle valve 2 are respectively connected with the first working oil port A and the second working oil port B; the explosion-proof proportional relief valve 3 adopts a plug-in type structure and is plugged into the side surface of the valve block 1, two ends of the explosion-proof proportional relief valve 3 are respectively connected with the return oil port T and an oil outlet of the shuttle valve 2, and the shuttle valve 2 and the explosion-proof proportional relief valve 3 are used to realize the pressure stabilizing effect of an executing element in the return oil process and the safety protection effect on the system.

[0025] Furthermore, such as Fig. 1~6 As shown, in this embodiment, a spare oil port T1 is also provided on the valve block 1. The spare oil port T1 is connected to the output end of the explosion-proof proportional overflow valve 3 and is connected to the oil tank.

[0026] Furthermore, such as Fig. 1~6 As shown, in this embodiment, it also includes: a pressure measuring port M, which is opened on the valve block 1, connected to the oil outlet of the shuttle valve 2, and connected to an external pressure gauge for pressure measurement.

[0027] Furthermore, such as Fig. 1~6 As shown, in this embodiment, it also includes: a plug, which is placed on the pressure measuring port M to seal the pressure measuring port when pressure measurement is not required.

[0028] Furthermore, such as Fig. 1~6 As shown, in this embodiment, valve block 1 is a cuboid.

[0029] Furthermore, such as Fig. 1~6 As shown, in this embodiment, the valve block 1 is made of No. 45 steel, which not only has strong rust and corrosion resistance, but also has high integrated block strength, is easy to process, has short processing time, improves efficiency, and greatly saves costs.

[0030] Furthermore, such as Fig. 1~6 As shown, in this embodiment, the valve block 1 is also provided with several mounting holes 4 for mounting and fixing the valve block 1.

[0031] Working principle: The first working port A connects to the rodless chamber of the cylinder; the second working port B connects to the rod chamber; the pressure measuring port M connects to a pressure gauge; the return port T connects to the oil tank; and the spare port T1 is for backup. When oil returns from the rodless chamber, it goes to the first working port A, passes through the shuttle valve 2 (which limits flow and pressure), and generates back pressure at the explosion-proof proportional relief valve 3 (the specific pressure can be observed through the pressure measuring port M). This ensures that the oil returns smoothly to the oil tank when the cylinder retracts. When oil returns from the rod chamber, it goes to the second working port B, passes through the shuttle valve 2 (which limits flow and pressure), and generates back pressure at the explosion-proof proportional relief valve 3 (the specific pressure can be observed through the pressure measuring port M). This ensures that the oil returns smoothly to the oil tank when the cylinder extends. The valve assembly has a rated flow rate of 80 L / min and a rated pressure of 250 bar.

[0032] Above, refer to Fig. 1~6The plug-in type proportional overflow valve group according to the embodiment of the utility model not only can increase the stability of the moving part when returning oil, but also can prevent system overload, so that the system pressure is no longer increased; moreover, the plug-in type design guarantees compact structure, small volume, small space occupation, so that the valve group becomes more convenient when installing, repairing or cleaning.

[0033] It should be noted that in the present specification, the terms "comprising", "containing" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the elements defined by the statement "containing" do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0034] Although the content of the utility model has been introduced in detail by the above preferred embodiment, it should be recognized that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and alternatives of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the appended claims.

Claims

1. A cartridge proportional relief valve assembly comprising: The valve block, the shuttle valve and the explosion-proof proportional overflow valve are included. An oil return port, a first working oil port and a second working oil port are formed on the valve block, the oil return port is connected with an external oil tank, and the first working oil port and the second working oil port are respectively connected with two ends of an external oil cylinder. The shuttle valve is arranged on the side of the valve block, and two oil inlet ports of the shuttle valve are respectively connected with the first working oil port and the second working oil port. The explosion-proof proportional overflow valve is inserted into the side of the valve block, and two ends of the explosion-proof proportional overflow valve are respectively connected with the oil return port and an oil outlet port of the shuttle valve.

2. The packaged proportional relief valve assembly of claim 1, wherein, A standby oil port is further formed on the valve block, the standby oil port is connected with an output end of the explosion-proof proportional overflow valve and connected with the oil tank.

3. The cartridge proportional relief valve assembly of claim 1 or 2, wherein, A pressure measuring port is further included, the pressure measuring port is formed on the valve block, the pressure measuring port is connected with the oil outlet port of the shuttle valve, and the pressure measuring port is connected with an external pressure gauge.

4. The packaged proportional relief valve assembly of claim 3, wherein, A plug is further included, the plug is arranged on the pressure measuring port.

5. The packaged proportional relief valve assembly of claim 1, wherein, The valve block is a cuboid.

6. The packaged proportional relief valve assembly of claim 1, wherein, The valve block is made of 45# steel.

7. The packaged proportional relief valve assembly of claim 1, wherein, A plurality of mounting holes are further formed on the valve block.

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