A method of recovering an emulsion

Abstract

The application discloses an emulsion recovery method, and specifically comprises the following steps: step 1: a branch pipeline is installed at an outlet of an emulsion pump, the branch pipeline is connected with a main liquid inlet pipeline and a liquid return pump box, a pressure relief device and a pump liquid device are installed in parallel in the branch pipeline, and the main liquid inlet pipeline and a main liquid return pipeline are connected with the liquid inlet of a support at a three-way joint and a first stop valve; step 2: the emulsion pump is stopped, the pressure relief device on the branch pipeline is opened, and the pressure in the liquid inlet pipeline is unloaded; and step 3: the pressure relief device on the branch pipeline is closed, the first stop valve at the liquid inlet of the support is opened, the liquid inlet pipeline and the liquid return pipeline are connected, the pump liquid device in the branch pipeline is operated, and the emulsion in the main liquid inlet pipeline and the main liquid return pipeline is sucked into the liquid return pump box. The application has the advantages that no liquid or little liquid and no pressure exist in the main liquid inlet pipeline, the waste of emulsion is reduced, the on-site operation environment can be effectively improved, and human resources can be saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mine equipment, and particularly relates to an emulsion recovery method. BACKGROUND

[0002] In a fully mechanized coal face hydraulic system, emulsion is widely used as a key medium. The emulsion mixed by concentrated liquid and water in a certain proportion is pressurized by an emulsion pump, enters the coal face through a main liquid inlet pipeline, and returns to a liquid return pump box through a main liquid return pipeline after the action of the support executing element is completed, forming a complete hydraulic system. The emulsion plays a role in transmitting pressure in the system, has the effects of lubrication, corrosion prevention and cooling on the support and other equipment, and can clean small particles in the hydraulic system to ensure stable operation of the support system. As the working face advances, the liquid supply route becomes shorter, and the excess main liquid pipeline needs to be removed. Meanwhile, the main hydraulic pipe may be damaged during production, which requires the pipeline to be disassembled and assembled. Since the hydraulic pipe transmits liquid under pressure, the emulsion pump is generally stopped, and then the emulsion in the pipeline is discharged through a liquid discharge valve near the pipeline to ensure that the pipeline can be disassembled and assembled under no pressure. In this process, a large amount of emulsion will be wasted, and water will accumulate on the roadway floor, affecting the working environment. SUMMARY

[0003] The technical problem to be solved by the present application is how to reduce the waste of emulsion and improve the working environment.

[0004] To solve the above technical problems, the present application provides the following technical scheme:

[0005] An emulsion recovery method, specifically comprising the following steps:

[0006] Step 1: A branch pipeline is installed at the emulsion pump outlet, the branch pipeline is connected to the main liquid inlet pipeline and the liquid return pump box, a pressure relief device and a pump liquid device are installed in parallel in the branch pipeline, and the main liquid inlet pipeline and the main liquid return pipeline are connected to the support liquid inlet through a tee joint and a first stop valve;

[0007] Step 2: Stop the emulsion pump, open the pressure relief device on the branch pipeline, and unload the pressure in the liquid inlet pipeline;

[0008] Step 3: Close the pressure relief device on the branch pipeline, open the first stop valve at the support liquid inlet, connect the liquid inlet pipeline and the liquid return pipeline, and run the pump liquid device in the branch pipeline to suck the emulsion in the main liquid inlet pipeline and the main liquid return pipeline into the liquid return pump box.

[0009] The recovery method in the application changes the flow direction of the emulsion in the original hydraulic system, shifts the liquid unloading point to the liquid recovery pump box, realizes no liquid and no pressure or little liquid and no pressure in the main liquid inlet pipeline, thereby recovering the emulsion, reducing the waste of the emulsion, and being suitable for liquid unloading and pressure relief when the main liquid pipeline is replaced in the fully mechanized coal mining face, and can effectively improve the on-site operation environment and save human resources.

[0010] Preferably, the emulsion pump is used for sending liquid when in operation and blocking hydraulic backflow when out of operation.

[0011] Preferably, after the emulsion pump is out of operation in step 1, the liquid inlet pipeline is changed in flow direction by the unloading device and the pump liquid device connected in parallel in the branch pipeline.

[0012] Preferably, the unloading device comprises an unloading pipeline and a one-way operating valve, the unloading pipeline is connected in series with the branch pipeline, and the one-way operating valve is arranged on the unloading pipeline.

[0013] The one-way operating valve is closed when the emulsion pump is in operation, and is used for blocking the flow of the emulsion from the unloading pipeline.

[0014] The one-way operating valve is opened when the emulsion pump is out of operation, and is used for unloading the high-pressure liquid in the main liquid inlet pipeline, and the unloaded emulsion enters the liquid recovery pump box through the branch pipeline.

[0015] Preferably, a pressure gauge is further arranged on the unloading pipeline.

[0016] Preferably, the first stop valve is in a closed state when the emulsion pump is in operation, and after the liquid pressure of the main liquid inlet pipeline is released by the unloading device when the emulsion pump is out of operation, the first stop valve is opened, the main liquid inlet pipeline and the main liquid return pipeline are connected, and a hydraulic pipeline is formed, and the direction of the hydraulic flow is reversed.

[0017] Preferably, the pump liquid device comprises a pump liquid pipeline, a pneumatic diaphragm pump and a second stop valve, the pump liquid pipeline is arranged in parallel with the unloading pipeline on the branch pipeline, and the pneumatic diaphragm pump and the second stop valve are arranged in sequence on the pump liquid pipeline.

[0018] The pneumatic diaphragm pump and the second stop valve are in a closed state when the emulsion pump is in operation.

[0019] When the emulsion pump is out of operation, the first stop valve is opened, then the pneumatic diaphragm pump and the second stop valve are opened to form a single-line pipeline, and the emulsion in the main liquid inlet pipeline and the main liquid return pipeline is sucked into the liquid recovery pump box by the pneumatic diaphragm pump.

[0020] Preferably, the pressure grade of the main liquid inlet pipeline and the branch pipeline is not less than 38 MPa.

[0021] Preferably, the main liquid return pipeline pressure grade is not less than 16 MPa.

[0022] Compared with the prior art, the application has the following beneficial effects:

[0023] By using the recycling method in the application, the direction of the emulsion flow in the original hydraulic system is changed, the liquid unloading point is transferred to the liquid return pump box, no liquid or no pressure or little liquid and no pressure in the main liquid inlet pipeline is realized, thereby the emulsion is recycled, the waste of the emulsion is reduced, and the method is suitable for liquid unloading and pressure relief when the main liquid pipeline is replaced in the fully mechanized coal mining face, the on-site operation environment can be effectively improved, and human resources can be saved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an embodiment of the application. DETAILED DESCRIPTION

[0025] In order to facilitate those skilled in the art to understand the technical scheme of the application, the technical scheme of the application will be further described in combination with the drawings of the specification.

[0026] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connection", "connecting", "fixing" and the like should be interpreted in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection, or communication; can be directly connected, or indirectly connected through an intermediate medium; can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] In the present application, unless specifically defined and limited otherwise, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless specifically defined and limited.

[0028] In the present embodiment, referring to Figure 1 , the emulsion recycling device is specifically provided as follows: the input end of the liquid inlet pump box 2 is connected with the liquid supplement pipeline 1, the output end of the liquid inlet pump box 2 is connected with the support 8 through the main liquid inlet pipeline 3, the main liquid inlet pipeline 3 is further provided with an emulsion pump 4, the emulsion pump 4 is used for sending liquid when running and blocking hydraulic backflow when stopping; one end of the main liquid return pipeline 13 is connected with the support 8, and the other end is connected with the liquid return pump box 14, the liquid return pump box 14 is further communicated with the liquid inlet pump box 2 through the pump box connecting pipeline 10.

[0029] The first stop valve 12 is arranged between the main liquid inlet pipeline 3 and the main liquid return pipeline 13, and specifically, the two ends of the first stop valve 12 are connected with the main liquid inlet pipeline 3 through the first three-way valve 7 and connected with the main liquid return pipeline 13 through the second three-way valve 11.

[0030] The main liquid inlet pipeline 3 at the outlet of the emulsion pump 4 is connected with the liquid return pump box 14 through the branch pipeline 6, and specifically, the branch pipeline 6 is communicated with the main liquid inlet pipeline 3 through the third three-way valve 5, wherein the branch pipeline 6 is provided with a pressure relief device and a pump liquid device which are installed in parallel through the fourth three-way valve 9 and the fifth three-way valve 21 respectively, and both devices are provided with a mechanism for blocking the flow of liquid, so as not to affect the flow direction of the liquid when the emulsion pump 4 is normally operated.

[0031] The pressure relief device comprises a pressure relief pipeline 18, a one-way operating valve 19 and a pressure gauge 20, the two ends of the pressure relief pipeline 18 are communicated with the fourth three-way valve 9 and the fifth three-way valve 21 respectively, and the pressure relief pipeline 18 is provided with the pressure gauge 20 and the one-way operating valve 19.

[0032] Specifically, during the pressure relief process, the one-way operating valve 19 is closed when the emulsion pump 4 is operated, so as to block the flow of emulsion from the pressure relief pipeline 18; and the one-way operating valve 19 is opened when the emulsion pump 4 is stopped, so as to unload the high-pressure liquid in the main liquid inlet pipeline 3, and the unloaded emulsion enters the liquid return pump box 14 through the branch pipeline 6. In this embodiment, the function of the pressure gauge 20 is mainly to observe the liquid pressure in the pressure relief pipeline 18, and when the display is 0, it indicates that the liquid pressure in the pressure relief pipeline 18 is fully released, so the one-way operating valve 19 can be closed. Wherein, when the emulsion pump 4 is operated, the first stop valve 12 is in a closed state; when the emulsion pump 4 is stopped, the liquid pressure in the main liquid inlet pipeline 3 is released through the pressure relief device, and then the first stop valve 12 is opened to connect the main liquid inlet pipeline 3 and the main liquid return pipeline 13, so as to form a hydraulic pipeline, and the direction of the hydraulic flow is reversed.

[0033] The pump liquid device comprises a pump liquid pipeline 15, a pneumatic diaphragm pump 16 and a second stop valve 17, the two ends of the pump liquid pipeline 15 are communicated with the fourth three-way valve 9 and the fifth three-way valve 21 respectively, so that the pump liquid pipeline 15 is arranged in parallel with the pressure relief pipeline 18 on the branch pipeline 6, and the pneumatic diaphragm pump 16 and the second stop valve 17 are arranged in sequence on the pump liquid pipeline 15.

[0034] Specifically, the pump liquid device is operated, the pneumatic diaphragm pump 16 and the second stop valve 17 are in a closed state when the emulsion pump 4 is operated; when the emulsion pump 4 is stopped, the first stop valve 12 is opened, and then the pneumatic diaphragm pump 16 and the second stop valve 17 are opened to form a single-line pipeline, and the emulsion in the main liquid inlet pipeline 3 and the main liquid return pipeline 13 is sucked back to the liquid return pump box 14 through the pneumatic diaphragm pump 16.

[0035] Further, the pressure level of the main liquid inlet pipeline 3 and the branch pipeline 6 is not less than 38 MPa, and the pressure level of the main liquid return pipeline 13 is not less than 16 MPa.

[0036] During normal production, the first stop valve 12, the second stop valve 17 and the one-way operating valve 19 are in a closed state, the emulsion enters the liquid inlet pump box 2 through the liquid supplement pipeline 1, the emulsion pump 4 runs to pressurize and then pumps the emulsion in the liquid inlet pump box 2 through the main liquid inlet pipeline 3, and then enters the support 9 actuator through the third three-way valve 5, the main liquid inlet pipeline 3 and the third three-way valve 5. After the support 9 actuator is actuated, the liquid return formed is guided into the liquid return pump box 14 through the second three-way valve 11 and the main liquid return pipeline 13, and then communicated with the liquid inlet pump box 2 through the pump box connecting pipeline 10. The two relatively independent pipelines of the liquid inlet system and the liquid return system in the device constitute the entire hydraulic system.

[0037] When the main liquid inlet pipeline and the main liquid return pipeline need to be disassembled and assembled, the emulsion in the pipeline is recovered first to form a pipeline with no liquid and no pressure or with little liquid and no pressure, and then the operation is performed; specifically, the embodiment discloses an emulsion recovery method, which specifically comprises the following steps:

[0038] Step 1: A branch pipeline 6 is installed at the emulsion outlet of the emulsion pump 4, the branch pipeline 6 connects the main liquid inlet pipeline 3 and the liquid return pump box 13, a pressure relief device and a pump liquid device are installed in parallel on the branch pipeline 6, and the main liquid inlet pipeline 3 and the main liquid return pipeline 13 are connected through the first three-way valve 7 and the first stop valve 12 at the liquid inlet of the working face support 8.

[0039] Further, after the emulsion pump 4 is stopped in this step 1, the direction of the emulsion flow in the liquid inlet pipeline is changed through the pressure relief device and the pump liquid device installed in parallel in the branch pipeline 6.

[0040] Step 2: Stop the operation of the emulsion pump 4, open the pressure relief device on the branch pipeline 4, and unload the pressure in the liquid inlet pipeline.

[0041] Specifically, the unloading process is as follows:

[0042] a. Stop the operation of the emulsion pump 4, the main liquid inlet pipeline 3 is in a closed state at both ends, and the emulsion in the pipeline is in a high-pressure static state. The end of the main liquid return pipeline 13 is in an open state at the upper opening of the liquid return pump box 14, and since the liquid return belongs to low pressure, after no liquid enters the main liquid return pipeline 13, the emulsion in the pipeline is in a low-pressure balanced static state.

[0043] b. Open the one-way operation valve 19 on the pressure relief pipeline 18, and the high-pressure liquid in the main liquid inlet pipeline 3 is input from the support 8 inlet, the first three-way valve 7, the main liquid inlet pipeline 3, the third three-way valve 5, the branch pipeline 6, the fourth three-way valve 9, the pressure relief pipeline 18, the fifth three-way valve 21, the branch pipeline 6, and is reversely input into the liquid return pump box 14, and the high pressure in the liquid inlet pipeline is released by the liquid discharge mode.

[0044] c. Observe the pressure gauge 20, and when the pressure in the pressure relief pipeline 18 is released to 0, close the one-way operation valve 19.

[0045] Step 3: Close the pressure relief device on the branch pipeline 6, open the first stop valve 12 at the liquid inlet of the support 9 and the second stop valve 17 on the pump liquid pipeline 15, at this time the main liquid inlet pipeline 3 and the main liquid return pipeline 13 form a pipeline, and are in a multi-liquid low-pressure state, then open the pneumatic diaphragm pump 16, and the emulsion is pumped to the liquid return pump box 14 through the main liquid return pipeline 13, the second three-way valve 11, the first stop valve 12, the first three-way valve 7, the main liquid inlet pipeline 3, the third three-way valve 5, the branch pipeline 6, the fourth three-way valve 9, the pump liquid pipeline 15, the second stop valve 17, the pneumatic diaphragm pump 16, the fifth three-way valve 21, and the branch pipeline 6, and the emulsion in the main liquid inlet pipeline 3 and the main liquid return pipeline 13 is pumped to the liquid return pump box 14, and after the emulsion is pumped out, the whole hydraulic pipeline is in a state of no pressure and no liquid or no pressure and little liquid, at this time the pipeline is disassembled.

[0046] The recycling method in the embodiment can reconstruct the pipeline of the hydraulic system, change the flow direction of the liquid in the hydraulic pipeline, transfer the liquid discharge point to the liquid return pump box 14, and design the one-way operation valve 19 to block the high-pressure liquid, and open the one-way operation valve 19 to deliver the high-pressure liquid to the liquid return pump box 14, thereby achieving the purpose of releasing pressure; by operating the pneumatic diaphragm pump 16, the emulsion in the hydraulic pipeline can be reversely pumped to the liquid return pump box 14, and the emulsion pump 4 forms an opposite liquid delivery route, which is the main equipment for recycling the emulsion, and has the advantages of low cost and high efficiency.

[0047] In summary, by using the recycling method in the embodiment, the flow direction of the emulsion in the original hydraulic system is changed, the liquid discharge point is transferred to the liquid return pump box 14, the main liquid inlet pipeline 3 is in a state of no liquid and no pressure or little liquid and no pressure, thereby recycling the emulsion, reducing the waste of the emulsion, and being suitable for discharging liquid and releasing pressure when replacing the main liquid pipeline in the fully mechanized working face, which can effectively improve the on-site operation environment and save human resources. The method has low investment, high safety, simple operation, significant economic benefits, and wide applicability.

[0048] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. Consequently, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the application being defined by the appended claims rather than the above description, and it is therefore intended that all changes and modifications that fall within the meaning and range of equivalency of the claims be embraced therein, any reference signs in the claims not being considered as limiting the claims concerned.

[0049] The above-described embodiments are merely exemplary and are not intended to limit the scope of the present application, and it is apparent for a person skilled in the art that various modifications and improvements can be made thereto without departing from the spirit of the present application, and such modifications and improvements are intended to fall within the scope of the present application.

Claims

1. An emulsion recovery method characterized by: Specifically comprising the following steps: Step 1: installing a branch pipeline at the outlet of the emulsion pump, the branch pipeline connecting the main liquid inlet pipeline and the liquid return pump box, and a pressure relief device and a pump liquid device being installed in parallel in the branch pipeline, and the main liquid inlet pipeline and the main liquid return pipeline being connected through a three-way pipe and a first stop valve at the support liquid inlet; Step 2: stopping the emulsion pump from running, and opening the pressure relief device on the branch pipeline to unload the pressure in the liquid inlet pipeline; Step 3: closing the pressure relief device on the branch pipeline, opening the first stop valve at the support liquid inlet to connect the liquid inlet pipeline and the liquid return pipeline, and running the pump liquid device in the branch pipeline to return the emulsion liquid in the main liquid inlet pipeline and the main liquid return pipeline to the liquid return pump box.

2. An emulsion recovery method according to claim 1, characterized in that: The emulsion pump is used for sending liquid when running and blocking hydraulic return flow when stopping running.

3. The method of claim 1, wherein: After the emulsion pump stops running in step 1, the direction of the emulsion liquid flow in the liquid inlet pipeline is changed by the pressure relief device and the pump liquid device installed in parallel in the branch pipeline.

4. The method of claim 1, wherein: The pressure relief device comprises a pressure relief pipeline and a one-way operating valve, the pressure relief pipeline being connected in series with the branch pipeline, and the one-way operating valve being arranged on the pressure relief pipeline; When the emulsion pump runs, the one-way operating valve is closed to block the emulsion liquid flow from the pressure relief pipeline; When the emulsion pump stops running, the one-way operating valve is opened to unload the high-pressure liquid in the main liquid inlet pipeline, and the unloaded emulsion liquid enters the liquid return pump box through the branch pipeline.

5. An emulsion recovery method according to claim 4, characterised in that: A pressure gauge is further arranged on the pressure relief pipeline.

6. The method of claim 4, wherein: When the emulsion pump runs, the first stop valve is in a closed state; when the emulsion pump stops running, the liquid pressure of the main liquid inlet pipeline is released by the pressure relief device, the first stop valve is opened, the main liquid inlet pipeline and the main liquid return pipeline are connected, a hydraulic pipeline is formed, and the direction of the hydraulic flow is reversed.

7. An emulsion recovery method according to claim 6, characterised in that: The pump liquid device comprises a pump liquid pipeline, a pneumatic diaphragm pump and a second stop valve, the pump liquid pipeline being arranged in parallel with the pressure relief pipeline on the branch pipeline, and the pneumatic diaphragm pump and the second stop valve being arranged in sequence on the pump liquid pipeline; When the emulsion pump runs, the pneumatic diaphragm pump and the second stop valve are in a closed state; When the emulsion pump stops running, the first stop valve is opened, then the pneumatic diaphragm pump and the second stop valve are opened to form a single pipeline, and the emulsion liquid in the main liquid inlet pipeline and the main liquid return pipeline is returned to the liquid return pump box by the pneumatic diaphragm pump.

8. The method of claim 1, wherein: The pressure grade of the main liquid inlet pipeline and the branch pipeline is not less than 38 MPa.

9. The method of claim 1, wherein: The pressure grade of the main liquid return pipeline is not less than 16 MPa.

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