Pump head direct connection type unloading valve

Abstract

The utility model discloses a pump head direct connection type unloading valve which comprises a valve body, a main valve assembly, a one-way valve assembly, a mechanical pilot valve and an electromagnetic pilot valve, and a cavity, a first valve cavity and a second valve cavity are formed in the valve body. A liquid inlet, a liquid outlet and a liquid return opening are formed in the valve body, the liquid inlet is communicated with the cavity, the liquid return opening is communicated with the first valve cavity, and the liquid outlet is communicated with the second valve cavity; a sealing ring is arranged at the liquid inlet, and a plurality of threaded columns are arranged on the peripheral side of the liquid inlet. The unloading valve has the advantages that the threaded columns are arranged on the peripheral side of the liquid inlet, after the pump head is aligned with the liquid inlet, the threaded columns are inserted into the flange connecting holes of the pump head, then the nuts are screwed in from the ends of the threaded columns and screwed tightly, the unloading valve and the pump can be directly connected, connection between the unloading valve and the pump body does not need a rubber pipe, installation of the unloading valve is facilitated, and the unloading valve is convenient to use. Meanwhile, the wall thickness of the valve body is far greater than that of the rubber hose connector, so that the safety is ensured; and a sealing ring is arranged at the liquid inlet, so that the sealing performance of connection between the valve body and the pump head can be guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to unload valve technical field, concretely relates to a pump head direct connection type unload valve. BACKGROUND

[0002] The emulsion pump station is the power element of the underground coal mining hydraulic system, and provides the emulsion medium for the working of the execution element. The hydraulic support is a complex mechanical structure applied to the underground coal mining working face. Due to the special working condition of the underground coal mining working face and the complexity and relevance of the hydraulic transmission system, the hydraulic support needs the high-pressure system in the working process, and the pressure of the pump station is not needed when stopping working. At this time, the unload valve is needed to release the pressure of the pump station. The mine unload valve protects the pump station hydraulic system and is an important pressure control device. Its function is mainly to provide the high-pressure emulsion for the hydraulic support and other comprehensive mining equipment under the condition that the emulsion pump continuously operates, and unload in time to keep the supply pressure in the control range to meet the intermittent use of the emulsion on the fully mechanized mining working face of the coal mine. The performance directly affects the important performance indexes such as the pressure and flow of the pump station system, and determines the working performance, coal mining efficiency and production safety of the pump station.

[0003] At present, the unload valve and the pump are connected by high-pressure hoses. Due to the impact of loading and unloading, high-pressure multilayer steel wire hoses are needed. When the hose is used, the following problems exist: 1. Even if it is a hose, it is close to a steel pipe state due to the multilayer steel wire, which causes installation difficulty; 2. The service life of the loading and unloading pipe is relatively low, especially the pipe joint. Therefore, a new type of unload valve needs to be designed to solve the above technical problems. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a pump head direct connection type unload valve to solve the above problems in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0006] According to the first aspect of the utility model, a pump head direct connection type unload valve comprises a valve body, a main valve assembly, a one-way valve assembly, a mechanical pilot valve and an electromagnetic pilot valve, a cavity, a first valve cavity and a second valve cavity are arranged in the valve body, the first valve cavity and the second valve cavity are communicated with the cavity respectively, the main valve assembly and the one-way valve assembly are arranged in the first valve cavity and the second valve cavity respectively;

[0007] A liquid inlet, a liquid outlet and a liquid return port are arranged on the valve body, the liquid inlet is communicated with the cavity, the liquid return port is communicated with the first valve cavity, and the liquid outlet is communicated with the second valve cavity;

[0008] Both the mechanical pilot valve and the electromagnetic pilot valve are located at the top of the valve body;

[0009] A sealing ring is provided at the liquid inlet, and multiple threaded posts are provided on the outer periphery of the liquid inlet.

[0010] Furthermore, the plurality of the threaded posts are arranged in a ring along the axis of the liquid inlet.

[0011] Furthermore, the number of the threaded posts is four.

[0012] Furthermore, the valve body is provided with multiple through holes, each of which penetrates the valve body. The through holes are arranged in a ring along the axis of the liquid inlet. Each through hole is provided with a threaded post, and each threaded post is provided with a bolt head at its end.

[0013] Furthermore, it also includes a positioning post, which is disposed on the valve body, close to the liquid inlet, and parallel to the threaded post.

[0014] Furthermore, the positioning pin and the valve body are an integral structure.

[0015] Furthermore, the inlet is provided with a recessed platform, and the sealing ring is disposed on the recessed platform.

[0016] Furthermore, it also includes an air filter, and the valve body is provided with an air inlet, which communicates with the first valve cavity, and the air filter is installed on the air inlet.

[0017] Furthermore, it also includes a first plug, a second plug, and a third plug, which are respectively disposed at the openings of the cavity, the first valve cavity, and the second valve cavity.

[0018] Furthermore, the first plug, the second plug, and the third plug are respectively connected to the valve body by bolts.

[0019] This utility model has the following advantages: multiple threaded posts are provided on the outer periphery of the inlet. After aligning the pump head with the inlet, the threaded posts are inserted into the flange connection hole of the pump head, and then nuts are screwed in from the ends of the threaded posts and tightened, so that the unloading valve can be directly connected to the pump. The connection between the unloading valve and the pump body does not require a hose, which facilitates the installation of the unloading valve. At the same time, the wall thickness of the valve body is much greater than the wall thickness of the hose joint, ensuring safety. A sealing ring is provided at the inlet to ensure the sealing performance of the connection between the valve body and the pump head. Attached Figure Description

[0020] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0021] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0022] Figure 1 A perspective view of a pump head direct-connected unloading valve provided for some embodiments of this utility model.

[0023] Figure 2 A rear view of a pump head direct-connected unloading valve provided for some embodiments of this utility model.

[0024] Figure 3 The image shows a right view of a pump head direct-connected unloading valve provided for some embodiments of this utility model.

[0025] Figure 4 for Figure 3 AA sectional view.

[0026] Figure 5 A front view of a pump head direct-connected unloading valve provided for some embodiments of this utility model.

[0027] Figure 6 A left view of a pump head direct-connected unloading valve provided for some embodiments of this utility model.

[0028] Figure 7 This is a top view of a pump head direct-connected unloading valve provided for some embodiments of the present invention.

[0029] Figure 8 A bottom view of a pump head direct-connected unloading valve provided for some embodiments of this utility model.

[0030] In the diagram: 1. Valve body, 2. Threaded post, 3. Inlet, 4. Recess, 5. Sealing ring, 6. Positioning post, 7. First plug, 8. Return port, 9. Second plug, 10. Air filter, 11. Mechanical pilot valve, 12. Solenoid pilot valve, 13. Third plug, 14. Outlet, 15. Cavity, 16. Main valve assembly, 17. Check valve assembly. Detailed Implementation

[0031] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] Example 1

[0033] like Figures 1 to 8 As shown, a pump head direct-connect unloading valve according to the first aspect embodiment of the present invention includes a valve body 1, a main valve assembly 16, a one-way valve assembly 17, a mechanical pilot valve 11 and an electromagnetic pilot valve 12. The valve body 1 is provided with a cavity 15, a first valve cavity and a second valve cavity. The first valve cavity and the second valve cavity are respectively connected to the cavity 15. The main valve assembly 16 and the one-way valve assembly 17 are respectively disposed in the first valve cavity and the second valve cavity.

[0034] The valve body 1 is provided with an inlet 3, an outlet 14 and a return port 8. The inlet 3 is connected to the cavity 15, the return port 8 is connected to the first valve cavity, and the outlet 14 is connected to the second valve cavity.

[0035] Both the mechanical pilot valve 11 and the solenoid pilot valve 12 are located at the top of the valve body 1;

[0036] A sealing ring 5 is provided at the liquid inlet 3. Specifically, a recess 4 is provided inside the liquid inlet 3, and the sealing ring 5 is set on the recess 4. The sealing ring 5 is made of pressure-resistant and corrosion-resistant material. Specifically, the sealing ring 5 can be made of neoprene rubber, nitrile rubber, etc. Multiple threaded posts 2 are provided on the outer periphery of the liquid inlet 3.

[0037] In this embodiment, it should be noted that the specific structure and arrangement of the valve assembly 16, the one-way valve assembly 17, the mechanical pilot valve 11, and the electromagnetic pilot valve 12 are the same as the structure and arrangement direction of the corresponding components of the existing unloading valve, and will not be described again here.

[0038] Multiple threaded posts 2 are arranged in a ring along the axis of the inlet 3. Specifically, there are four threaded posts 2, which are arranged in a rectangular array along the axis of the inlet 3.

[0039] Furthermore, the working principle of the entire unloading valve is as follows: the unloading valve inlet 3 is connected to the emulsion pump outlet, the outlet 14 is connected to the hydraulic support and other actuators on the fully mechanized mining face, and the return port 8 is connected to the emulsion tank. The opening and closing of the unloading valve is controlled by the working pressure of the hydraulic system. When the working pressure is lower than the unloading valve's set value, the main valve is closed, and the pump supplies high-pressure emulsion to the system through the check valve; conversely, the unloading valve opens, the emulsion returns to the oil tank, the pump is unloaded, and the system is pressure-maintained by the accumulator. The emulsion pump operates without load, saving energy and electricity, and improving the pump's service life.

[0040] The technical effects achieved in this embodiment are as follows: multiple threaded posts 2 are provided on the outer periphery of the inlet. After aligning the pump head with the inlet 3, the threaded posts 2 are inserted into the flange connection hole of the pump head. Then, nuts are screwed into the ends of the threaded posts 2 and tightened, so that the unloading valve can be directly connected to the pump. The connection between the unloading valve and the pump body does not require a hose, which facilitates the installation of the unloading valve. At the same time, the wall thickness of the valve body is much greater than the wall thickness of the hose joint, ensuring safety. A sealing ring 5 is provided at the inlet, which can ensure the sealing performance of the connection between the valve body 1 and the pump head.

[0041] Example 2

[0042] like Figures 1 to 8 As shown, this embodiment provides another pump head direct-connected unloading valve, the structure of which includes all the contents of embodiment 1. Only the different parts are described below.

[0043] In this embodiment, the valve body 1 is provided with multiple through holes, each through hole penetrating the valve body 1. The through holes are arranged in a ring along the axis of the liquid inlet 3. Each through hole is provided with a threaded post 2. Each threaded post 2 is provided with a bolt head at its end. The bolt head is preferably a hexagonal bolt head, and the threaded post 2 is formed by bolts. After each bolt passes through the through hole, a threaded post 2 can be formed on the outer periphery of the liquid inlet 3, which is easy to process and manufacture.

[0044] In this embodiment, it should be noted that a positioning post 6 is also included. The positioning post 6 is disposed on the valve body 1, close to the liquid inlet 3, and parallel to the threaded post 2.

[0045] Furthermore, the positioning pin 6 and the valve body 1 are integrally formed, or the valve body 1 is provided with a blind hole, and one end of the positioning pin 6 is inserted into the blind hole.

[0046] The technical effects achieved in this embodiment are as follows: the threaded column 2 is formed by bolts, which is convenient for processing and manufacturing, and also convenient for assembly; by setting the positioning column 6, it is convenient for quick positioning and installation.

[0047] Example 3

[0048] like Figures 1 to 8As shown, this embodiment provides another pump head direct-connected unloading valve, the structure of which includes all the contents of embodiment 1. Only the different parts are described below.

[0049] In this embodiment, an air filter 10 is also included. The valve body 1 is provided with an air supply port, which is connected to the first valve chamber. The air filter 10 is installed on the air supply port.

[0050] In this embodiment, it should be noted that a first plug 7, a second plug 9, and a third plug 13 are also included. The first plug 7, the second plug 9, and the third plug 13 are respectively disposed at the openings of the cavity 15, the first valve cavity, and the second valve cavity. The first plug 7, the second plug 9, and the third plug 13 are respectively connected to the valve body 1 by bolts.

[0051] The technical effects achieved by this embodiment are as follows: by setting the air filter 10, the air can be filtered during air replenishment to prevent impurities from entering; by setting the first plug 7, the second plug 9 and the third plug 13, assembly and disassembly are facilitated.

[0052] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

[0053] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

Claims

1. A pump head direct-connection unloading valve, characterized in that, The system includes a valve body (1), a main valve assembly (16), a check valve assembly (17), a mechanical pilot valve (11), and a solenoid pilot valve (12). The valve body (1) is provided with a cavity (15), a first valve chamber, and a second valve chamber. The first valve chamber and the second valve chamber are respectively connected to the cavity (15). The main valve assembly (16) and the check valve assembly (17) are respectively disposed in the first valve chamber and the second valve chamber. The valve body (1) is provided with an inlet (3), an outlet (14) and a return port (8). The inlet (3) is connected to the cavity (15), the return port (8) is connected to the first valve cavity, and the outlet (14) is connected to the second valve cavity. Both the mechanical pilot valve (11) and the electromagnetic pilot valve (12) are located on the top of the valve body (1); A sealing ring (5) is provided at the liquid inlet (3), and multiple threaded posts (2) are provided on the outer periphery of the liquid inlet (3).

2. The pump head direct-connection unloading valve according to claim 1, characterized in that, Multiple threaded columns (2) are arranged in a ring along the axis of the liquid inlet (3).

3. The pump head direct-connection unloading valve according to claim 2, characterized in that, The number of the threaded columns (2) is four.

4. The pump head direct-connection unloading valve according to claim 1, characterized in that, The valve body (1) is provided with multiple through holes, each of which penetrates the valve body (1). The through holes are arranged in a ring along the axis of the liquid inlet (3). Each through hole is provided with a threaded post (2), and each threaded post (2) is provided with a bolt head at its end.

5. A pump head direct-connection unloading valve according to claim 1, characterized in that, It also includes a positioning post (6), which is disposed on the valve body (1), the positioning post (6) is close to the liquid inlet (3), and the positioning post (6) is parallel to the threaded post (2).

6. A pump head direct-connection unloading valve according to claim 5, characterized in that, The positioning column (6) and the valve body (1) are an integral structure.

7. A pump head direct-connection unloading valve according to claim 1, characterized in that, The inlet (3) is provided with a recess (4), and the sealing ring (5) is disposed on the recess (4).

8. A pump head direct-connection unloading valve according to claim 1, characterized in that, It also includes an air filter (10), and the valve body (1) is provided with an air inlet, which is connected to the first valve cavity. The air filter (10) is installed on the air inlet.

9. A pump head direct-connection unloading valve according to claim 1, characterized in that, It also includes a first plug (7), a second plug (9) and a third plug (13), the first plug (7), the second plug (9) and the third plug (13) being respectively disposed at the openings of the cavity (15), the first valve cavity and the second valve cavity.

10. A pump head direct-connection unloading valve according to claim 9, characterized in that, The first plug (7), the second plug (9) and the third plug (13) are respectively connected to the valve body (1) by bolts.

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