Emulsion pump and spherical unloading device

Abstract

The utility model belongs to the technical field of long-service-life spherical unloading devices of emulsification pumps, and discloses a spherical unloading device which comprises a mechanical unloading valve, a liquid outlet hole is formed in the mechanical unloading valve, a transition valve body is arranged on the outer side of the mechanical unloading valve, a spring is arranged in an inner cavity of the transition valve body, a steel ball is arranged at the other end of the spring, and the steel ball is connected with the mechanical unloading valve. An inner cavity of the transition valve body is movably connected with an ejector pin, a plug is arranged on the outer surface of the ejector pin, and an electromagnetic pilot operated valve is arranged on the outer side of the transition valve body. The emulsifying pump is provided with the steel ball and the ejector pin, the steel ball is used for conducting on-off sealing on liquid, then the ejector pin drives the guide belt to conduct sealing, the spring assists in conducting sealing on the steel ball, and the steel ball automatically abuts against the transition valve body when the emulsifying pump does not have pressure, so that unloading pressure is set through software, and mechanical impact of the emulsifying pump is reduced; the service life is prolonged, and reliable operation of the emulsification pump is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to emulsion pump high life ball unloading device technical field, specifically an emulsion pump and ball unloading device. BACKGROUND

[0002] The emulsion pump is a necessary equipment of mine, is the important power hydraulic element of the special liquid injection equipment of "external injection type single hydraulic prop" and "hydraulic support" for coal mine underground support operation, and is indispensable tool for support operation replacement and maintenance.

[0003] The existing emulsion pump is provided with an unloading device in the inside when using, when the hydraulic system reaches the upper limit of the set working pressure, the unloading device will automatically open, the high pressure liquid discharged from the emulsion pump is returned to the emulsion tank, so that the pump runs under low pressure, however, when the existing unloading device discharges high pressure liquid, the high pressure causes damage to the emulsion pump and other hydraulic elements, and the service life of the existing electromagnetic unloading valve is about 40,000 times, which is far from the service life requirement of the emulsion pump unloading valve, so it needs to be improved. UTILITY MODEL CONTENTS

[0004] To solve the problems in the above background art, the utility model provides an emulsion pump and ball unloading device.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a ball unloading device, including mechanical unloading valve, the mechanical unloading valve is provided with liquid outlet hole, the mechanical unloading valve outside is provided with transition valve body, the transition valve body inner chamber is provided with spring, the spring other end is provided with steel ball, the transition valve body inner chamber is movably connected with thimble, the thimble outer surface is provided with plug, the transition valve body outside is provided with electromagnetic pilot valve, the mechanical unloading valve inside is provided with liquid inlet hole located on the outside of spring;

[0006] Wherein, the transition valve body is internally provided with pressure source opening, the spring, steel ball, thimble, guide belt and plug are all arranged in the inner cavity of pressure source opening, the transition valve body is internally provided with working port one and working port two located above and below pressure source opening respectively, the transition valve body is internally provided with low pressure port located at the bottom of pressure source opening.

[0007] Preferably, the spring, steel ball, thimble and plug are on the same straight line.

[0008] Preferably, the transition valve body is internally provided with filter, and the filter is in communication with the pressure source opening.

[0009] Preferably, the thimble outside is provided with guide belt groove, and the guide belt groove inner wall is movably connected with the guide belt outside.

[0010] Preferably, the inside of the ejector pin is provided with a mounting thread, and the outside of the mounting thread is provided with an ejector pin high-pressure side.

[0011] Preferably, the ratio of the diameter of the steel ball sealing surface to the diameter of the ejector pin high-pressure side is 1.5 times.

[0012] Preferably, the inlet hole is filled with high-pressure liquid, and the outlet hole is filled with low-pressure liquid, and the pressure of the high-pressure liquid is 37.5MPA.

[0013] An emulsion pump comprising the above-mentioned spherical unloading device.

[0014] Compared with the prior art, the emulsion pump has the following beneficial effects:

[0015] The emulsion pump has the following beneficial effects: the steel ball is used for sealing the liquid, the ejector pin drives the guide belt to seal, and the spring assists the sealing of the steel ball; when the emulsion pump has no pressure, the steel ball automatically leans against the transition valve body, so that the unloading pressure is set through software, the mechanical impact of the emulsion pump itself is reduced, the service life is improved, and the reliable operation of the emulsion pump is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the emulsion pump;

[0017] Figure 2 It is a schematic diagram of the partial cross-sectional structure of the transition valve body of the emulsion pump;

[0018] Figure 3 It is a schematic diagram of the structure of the transition valve body of the emulsion pump;

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the transition valve body of the emulsion pump;

[0020] Figure 5 It is a schematic diagram of the structure of the ejector pin of the emulsion pump.

[0021] In the drawing: 1, mechanical unloading valve; 2, outlet hole; 3, transition valve body; 301, pressure source port; 302, working port one; 303, working port two; 304, low-pressure port; 305, filter; 4, spring; 5, steel ball; 6, ejector pin; 7, guide belt; 8, plug; 9, electromagnetic pilot valve; 10, inlet hole; 11, guide belt groove; 12, mounting thread; 13, ejector pin high-pressure side. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0023] Embodiment 1

[0024] As Figures 1 to 5 shown, it is the first embodiment of the utility model, provides a kind of emulsion pump and spherical unloading device, including mechanical unloading valve 1, mechanical unloading valve 1 inside is provided with liquid outlet hole 2, mechanical unloading valve 1 outside is provided with transition valve body 3, spring 4 is arranged in transition valve body 3 inner cavity, spring 4 other end is provided with steel ball 5, transition valve body 3 inner cavity is movably connected with thimble 6, thimble 6 outer surface is provided with plug 8, transition valve body 3 outside is provided with electromagnetic pilot valve 9, mechanical unloading valve 1 inside is provided with liquid inlet hole 10 located at the outside of spring 4;

[0025] Among them, pressure source mouth 301 is opened in transition valve body 3 inside, spring 4, steel ball 5, thimble 6, guide belt 7 and plug 8 are all arranged in the inner cavity of pressure source mouth 301, transition valve body 3 inside is separately provided with working port one 302 and working port two 303 located above and below pressure source mouth 301, low pressure port 304 is opened in transition valve body 3 inside and located at the bottom of pressure source mouth 301;

[0026] When emulsion pump has no pressure, steel ball 5 is automatically close to transition valve body 3 by spring 4 elastic force, while electromagnetic pilot valve 9 is not electrified, pressure source mouth 301 on transition valve body 3 is not communicated with working port one 302 and working port two 303, there is no high-pressure liquid between thimble 6 and plug 8, working port one 302 and working port two 303 in transition valve body 3 are communicated with low-pressure liquid in low pressure port 304, emulsion pump high-pressure liquid passes through spring 4, and steel ball 5 seals transition valve body liquid outlet hole 2, so that emulsion pump works normally;

[0027] When electromagnetic pilot valve 9 is electrified, working port one 302 and working port one 302 in transition valve body 3 are not communicated with low-pressure liquid in low pressure port 304, high-pressure liquid enters pressure source mouth 301, pressure source mouth 301, working port one 302 and working port two 303 are communicated, there is high-pressure liquid between thimble 6 and plug 8, high-pressure liquid acts on the rear part of thimble 6, thimble 6 generates thrust and moves to left, overcomes the elastic force of spring 4, and pushes away steel ball 5 and transition valve body 3, so that high-pressure liquid flows to low-pressure side, and unloading channel is opened;

[0028] When the electromagnetic pilot valve 9 is closed, the high-pressure liquid between the ejector pin 6 and the plug 8 is released to the low-pressure side through the working port 1 302, the working port 2 303 and the low-pressure port 304. The spring 4 pushes the steel ball 5 to move to the right, and closes the unloading channel again.

[0029] By setting the unloading pressure, the mechanical impact of the emulsifying pump itself is reduced, which greatly improves the service life of the equipment and ensures the reliable operation of the emulsifying pump.

[0030] Example 2

[0031] like Figures 2 to 5 As shown, this embodiment includes the features of embodiment 1, the distinguishing technical feature being that the spring 4, steel ball 5, ejector pin 6 and plug 8 are on the same straight line;

[0032] By aligning spring 4, steel ball 5, ejector pin 6, and plug 8 on the same line, see appendix. Figure 2 The spring 4 generates a spring force that acts on the steel ball 5 through the pin 6, causing the steel ball 5 to press tightly against the transition valve body 3 to form a seal. This ensures that the steel ball 5 can accurately block the transition valve body 3, achieving a good seal and preventing leakage of the emulsion liquid.

[0033] The transition valve body 3 is equipped with a filter 305 inside, and the outside of the filter 305 is connected to the pressure source port 301.

[0034] When the solenoid pilot valve 9 is energized, the high-pressure liquid enters the pressure source port 301 through the filter 305, thereby effectively intercepting solid impurities in the high-pressure liquid through the filter 305, preventing impurities from entering the transition valve body 3, which would affect the normal operation and sealing of the transition valve body 3, and extend the service life of the emulsion pump.

[0035] Among them, the outer side of the ejector pin 6 is provided with a guide groove 11, and the inner wall of the guide groove 11 is movably connected to the outer side of the guide band 7;

[0036] The guide groove 11 is used to attach the guide belt 7 onto the ejector pin 6 and to limit the guide belt 7 so as to prevent it from falling off the ejector pin 6. At the same time, the guide belt 7 seals with the transition valve body 3 to prevent liquid from flowing out.

[0037] Among them, the inner side of the ejector pin 6 is provided with an installation thread 12, and the outer side of the installation thread 12 is provided with a high pressure side 13 of the ejector pin;

[0038] The high-pressure side 13 of the ejector pin is installed on the outside of the ejector pin 6 by means of the installation thread 12. The high-pressure side 13 of the ejector pin is used in conjunction with the steel ball 5 to control the flow and sealing of the emulsion under high pressure. When the high-pressure liquid acts on the ejector pin 6, the sealing surfaces of the ejector pin 6 and the steel ball 5 are tightly fitted to form a sealing structure to prevent liquid leakage.

[0039] Wherein the ratio of the diameter of the sealing surface of the steel ball 5 to the diameter of the high-pressure side 13 of the needle is 1.5 times;

[0040] When the larger sealing surface of the steel ball 5 can provide a wider sealing area, it is well matched with the high-pressure side 13 of the needle, and when the steel ball 5 is in contact under pressure, it can form an effective sealing line to prevent high-pressure liquid leakage. If the diameter of the sealing surface of the steel ball 5 is too small, it may not be able to completely cover the end of the high-pressure side 13 of the needle, resulting in a loose seal, affecting the working efficiency and pressure stability of the emulsion pump, and at the same time, it can play a certain buffering role, absorbing the impact force caused by pressure fluctuations, protecting other components from the impact of pressure.

[0041] Wherein the inlet hole 10 flows high-pressure liquid, and the outlet hole 2 flows low-pressure liquid, and the pressure of the high-pressure liquid is 37.5MPA.

[0042] An emulsion pump comprising the spherical unloading device of the above-mentioned scheme.

[0043] It should be noted that in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0044] Although the embodiments of the present application have been shown and described, it is to be 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 spherical unloading device comprising a mechanical unloading valve (1), characterized in that: The mechanical unloading valve (1) is provided with a liquid outlet hole (2), and the outer side of the mechanical unloading valve (1) is provided with a transition valve body (3), the inner cavity of the transition valve body (3) is provided with a spring (4), the other end of the spring (4) is provided with a steel ball (5), the inner cavity of the transition valve body (3) is movably connected with a thimble (6), the outer surface of the thimble (6) is provided with a plug (8), the outer side of the transition valve body (3) is provided with an electromagnetic pilot valve (9), and the inner side of the mechanical unloading valve (1) is provided with a liquid inlet hole (10) located outside the spring (4). Wherein, the transition valve body (3) is internally provided with a pressure source port (301), the spring (4), the steel ball (5), the thimble (6), the guide belt (7) and the plug (8) are arranged in the inner cavity of the pressure source port (301), and the transition valve body (3) is internally provided with a working port one (302) and a working port two (303) located above and below the pressure source port (301) respectively, and the transition valve body (3) is internally provided with a low pressure port (304) located at the bottom of the pressure source port (301).

2. A spherical unloading device according to claim 1, characterized in that: The spring (4), the steel ball (5), the thimble (6) and the plug (8) are on the same straight line.

3. A spherical unloading device according to claim 1, characterized in that: The transition valve body (3) is internally provided with a filter (305), and the filter (305) is in communication with the pressure source port (301) outside.

4. A spherical unloading device according to claim 1, characterized in that: The outer side of the thimble (6) is provided with a guide belt groove (11), and the inner wall of the guide belt groove (11) is movably connected with the outer side of the guide belt (7).

5. A spherical unloading device according to claim 1, characterized in that: The inner side of the thimble (6) is provided with a mounting thread (12), and the outer side of the mounting thread (12) is provided with a thimble high pressure side (13).

6. A spherical unloading device according to claim 1, characterized in that: The diameter ratio of the sealing surface of the steel ball (5) to the diameter of the thimble high pressure side (13) is 1.5 times.

7. A spherical unloading device according to claim 1, characterized in that: The liquid inlet hole (10) is in flow communication with high pressure liquid, the liquid outlet hole (2) is in flow communication with low pressure liquid, and the pressure of the high pressure liquid is 37.5MPA.

8. An emulsion pump characterized by The spherical unloading device of any one of claims 1-7. The spherical unloading device of any one of claims 1-7.

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