Mining high-pressure pump pressure regulating method based on electric control proportional valve

Abstract

The invention belongs to the technical field of pressure regulation of mining high-pressure clean water pumps, and relates to a mining high-pressure pump pressure regulation method based on an electric control proportional valve, the method is characterized in that an overflow valve and a pressure gauge are connected to a water outlet of a high-pressure pump, so that the pressure and flow of the water outlet of the high-pressure pump are controlled through the overflow valve, and the overflow valve is connected with the electric control proportional valve; the electric control proportional valve is connected with a fluid power source, and the fluid power source is connected with the overflow valve through the electric control proportional valve so that the opening degree of the overflow valve can be controlled through the opening degree of the electric control proportional valve. The electric control proportional valve and the pressure gauge are both connected to a programmable controller, the programmable controller adjusts the opening degree of the electric control proportional valve according to the pressure, detected by the pressure gauge in real time, of the water outlet of the high-pressure pump so as to adjust the opening degree of the overflow valve, and then the pressure and flow of the water outlet of the high-pressure pump are adjusted through the overflow valve. The invention solves the problems of large volume, high price, inconvenience in movement and the like of the conventional high-pressure pump variable-frequency pressure regulation mode.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure regulation of a high-pressure clean water pump for mining, and relates to a pressure regulation method of a high-pressure clean water pump for mining based on an electronically controlled proportional valve. Background Art

[0002] In the field of coal mining and gas extraction, mining high-pressure pumps, as key equipment in hydraulic fracturing and hydraulic fracturing technology, are of great significance for improving coal seam permeability and increasing gas extraction. However, existing mining high-pressure pumps still face many challenges in performance optimization and field application.

[0003] First, the traditional high-pressure pump working pressure regulation method relies on the operator to manually adjust the overflow valve at close range. This operation is not only inefficient, but also because the operator needs to face the high-pressure water flow directly, there are serious safety hazards, such as the risk of high-pressure water splashing and injuring people. Despite the adoption of a variety of protective measures, it is still difficult to completely avoid potential safety accidents. Secondly, although the variable frequency pressure regulation technology for high-pressure pumps can control the working pressure more accurately, the mainstream products on the market currently generally have problems such as large size, high manufacturing cost, and difficulty in on-site movement. These shortcomings limit the application of variable frequency pressure regulation technology in miniaturized and portable hydraulic permeability enhancement equipment, affecting construction efficiency and operational flexibility.

[0004] Therefore, developing a method for regulating the working pressure of a high-pressure pump that can both ensure operational safety and effectively control costs has become an important direction for the current development of mining high-pressure pump technology. Summary of the invention

[0005] In view of this, the object of the present invention is to provide a pressure regulating method for a mining high-pressure pump based on an electronically controlled proportional valve to solve the problems existing in the existing pressure regulating methods for mining high-pressure pumps.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A pressure regulating method for a mining high-pressure pump based on an electronically controlled proportional valve, wherein an overflow valve and a pressure gauge are connected to the water outlet of the high-pressure pump to control the pressure and flow of the water outlet of the high-pressure pump through the overflow valve, and the water outlet pressure of the high-pressure pump is monitored in real time through the pressure gauge, the overflow valve is connected to the electronically controlled proportional valve, the electronically controlled proportional valve is connected to a fluid power source, and the fluid power source is connected to the overflow valve through the electronically controlled proportional valve, so that the opening of the overflow valve is controlled by the opening of the electronically controlled proportional valve;

[0008] The electrically controlled proportional valve and the pressure gauge are both connected to a programmed controller, which adjusts the opening of the electrically controlled proportional valve based on the outlet pressure of the high-pressure pump detected in real time by the pressure gauge to adjust the opening of the overflow valve, thereby adjusting the outlet pressure and flow of the high-pressure pump through the overflow valve.

[0009] Furthermore, the fluid power source is an air pump, the electrically controlled proportional valve is an electrical proportional valve, and the overflow valve is a pneumatic overflow valve.

[0010] Furthermore, the fluid power source is a hydraulic pump, the electrically controlled proportional valve is an electro-hydraulic proportional valve, and the relief valve is a hydraulic relief valve.

[0011] Furthermore, the voltage regulation method comprises the following steps:

[0012] Step 1. Set the target pressure value of the water outlet of the high-pressure pump through the programming controller, and the programming controller converts the target pressure value into an electrical signal and transmits it to the electronically controlled proportional valve;

[0013] Step 2. The electronically controlled proportional valve adjusts its opening according to the electrical signal, thereby adjusting the fluid pressure entering the relief valve. The relief valve passively adjusts the stroke of the main valve core in the relief valve according to the fluid pressure to adjust and change the water outlet pressure of the high-pressure pump;

[0014] Step 3. At the same time, the pressure gauge feeds back the real-time pressure value monitored in real time to the programmed controller, and the programmed controller compares the target pressure value with the real-time pressure value, and repeats step S2 to further optimize the water outlet pressure of the high-pressure pump.

[0015] Furthermore, the programmed controller gradually sends the target pressure value electrical signal to the electronically controlled proportional valve according to a certain model, so that the opening of the electronically controlled proportional valve is gradually adjusted to control the gradual increase and decrease of the pressure at the water outlet of the high-pressure pump to avoid the impact caused by sudden increase and decrease of pressure.

[0016] The beneficial effects of the present invention are:

[0017] The present invention provides a pressure regulating method for a mining high-pressure pump based on an electronically controlled proportional valve, which regulates the pressure and flow of a water outlet of the high-pressure pump by means of the opening of an overflow valve, and controls the opening of the overflow valve by means of the opening of the electronically controlled proportional valve, and then monitors the real-time pressure value of the water outlet of the high-pressure pump by means of a pressure gauge, and feeds the result back to a programming controller, and regulates and controls the opening of the electronically controlled proportional valve by means of the programming controller, so that the water outlet pressure of the high-pressure pump can be monitored in real time, and then compared with a pressure setting value, and optimized in real time, so that the water outlet pressure of the high-pressure pump is always kept consistent with the set pressure.

[0018] The present invention realizes remote regulation of the pressure of the high-pressure pump, makes the high-pressure pump work more stably and makes on-site regulation more convenient, is beneficial to ensuring the safety of the slitting operation, is beneficial to reducing the number of operators and improving work efficiency, and is beneficial to promoting the development of equipment towards automation and informatization; and the equipment used in the method is stable, small, economical and precise, so that the present invention has good stability and economy, avoids safety hazards for operators, and solves the problems of large size, high price, inconvenient movement, etc. of the current mainstream high-pressure pump variable frequency voltage regulation method.

[0019] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0021] Figure 1 It is a principle diagram of a pressure regulating method of a mining high-pressure pump based on an electronically controlled proportional valve in the present invention;

[0022] Figure 2 It is the electronically controlled proportional valve in the present invention.

[0023] Figure markings: 1-high-pressure pump, 2-relief valve, 3-pressure gauge, 4-programmable controller, 5-electrically controlled proportional valve, 6-air pump, 7-air supply valve, 8-air supply port, 9-pressure chamber, 10-exhaust valve, 11-exhaust spring, 12-diaphragm, 13-exhaust port, 14-output port, 15-pressure relief hole, 16-main valve core, 17-pilot valve core spring, 18-pilot valve core, 19-damping hole, 20-high-pressure water inlet, 21-relief valve body, 22-pressure relief outlet. DETAILED DESCRIPTION

[0024] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0025] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0026] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] See also Figure 1-2 , which is a pressure regulating method for a mining high-pressure pump based on an electronically controlled proportional valve, wherein a pressure gauge 3 is connected to the water outlet of the high-pressure pump 1 to monitor the water outlet pressure of the high-pressure pump 1 in real time;

[0028] A relief valve 2 is also provided at the water outlet of the high-pressure pump 1 to control the outlet pressure and flow of the high-pressure pump, and the electrical proportional valve 5 is connected to the relief valve 2 to control the stroke of the main valve core 16 in the relief valve 2 by air pressure; the air pump 6 is connected to the electrically controlled proportional valve 5 to provide an air source for the electrically controlled proportional valve 5;

[0029] The programming controller 4 is connected to the pressure gauge 3 and the electronically controlled proportional valve 5 to collect the outlet pressure of the high-pressure pump in real time. At the same time, the programming controller 4 adjusts the parameters according to the pressure to control the opening of the electronically controlled proportional valve 5, thereby controlling the stroke of the valve core in the overflow valve 2 to adjust the outlet pressure of the high-pressure pump 1.

[0030] In this embodiment, an air pump 6 is used as a fluid power source, the electrically controlled proportional valve 5 is an electrical proportional valve, and the relief valve 2 is a pneumatic relief valve.

[0031] Specifically, taking the electric proportional valve as an example, the electric-controlled proportional valve 5 includes an electric-controlled proportional valve body, in which a gas flow channel is provided, and the gas flow channel has a gas supply port 8, an output port 14, an exhaust port 13 and a pressure chamber 9, the pressure chamber 9 is connected with the gas supply port 8, the output port 14 and the exhaust port 13, and an exhaust valve 10 and an air supply valve 7 are respectively provided at the upper and lower ends of the pressure chamber 9 to control the opening of the exhaust port 13 and the air supply port 8 respectively, and the exhaust valve 10 and the air supply valve 7 share a proportional valve core, and a diaphragm 12 is provided at one end of the proportional valve core to adjust the diaphragm 12 to control the opening of the exhaust valve 10 and the air supply valve 7;

[0032] The electrically controlled proportional valve body is provided with a cavity for accommodating a diaphragm 12 , and a control circuit is provided in the cavity, the air supply port 8 and the output port 14 to realize the opening control of the electrically controlled proportional valve.

[0033] Taking the pneumatic relief valve as an example, the relief valve 2 includes a relief valve body 21, a pilot valve core spring 17, a pilot valve core 18 and a main valve core 16. The relief valve body 21 has a high-pressure water inlet 20, a pressure relief outlet 22 and a gas inlet. The high-pressure water inlet 20 is connected to the pressure relief outlet 22 and is separated under the action of the main valve core 16. A pressure relief hole 15 is provided in the center of the main valve core 16 and a damping hole 19 is provided on the outside. The high-pressure water inlet 20 is connected to the water outlet of the high-pressure pump, and the output port 14 of the electrically controlled proportional valve is connected, and air pressure is applied to the pilot valve core spring 17 to control the opening of the pilot valve core 18, thereby controlling the opening of the main valve core 16.

[0034] In this embodiment, the specific regulation process of the high-pressure pump pressure regulation method based on the electronically controlled proportional valve includes the following steps:

[0035] S1: Keep the high-pressure pump 1, the air pump 6, and the programming controller 4 in the turned-on state;

[0036] S2: Setting the target pressure value through the programming controller 4, the programming controller 4 converts the target pressure value into an electrical signal and transmits it to the electronically controlled proportional valve 5;

[0037] S3: The electrically controlled proportional valve adjusts the position of the diaphragm 12 according to the electrical signal, thereby controlling the opening of the exhaust valve 10 and the air supply valve 7;

[0038] S4: The air flow in the air pump 6 enters the pressure chamber 9 through the air supply port 8;

[0039] S5: A portion of the gas in the pressure chamber 9 is discharged through the exhaust passage 7 according to the opening of the exhaust valve 10, and the other portion enters the relief valve 2 through the output passage 14;

[0040] S6: The gas adjusts the opening of the pilot valve core 18 by pushing the pilot valve core spring 17;

[0041] S7: A portion of the high-pressure water of the high-pressure pump 1 overflows through the flow channel formed by the high-pressure inlet 20, the damping hole 19, the pilot valve core 18, the pressure relief hole 15 and the pressure relief outlet 22;

[0042] S8: The overflow causes a pressure difference between the inside and outside of the main valve core 16, and the high-pressure water pushes the main valve core 16 upward to open the pressure relief outlet 22, so that the outlet pressure of the high-pressure pump 1 is reduced;

[0043] S9: The pressure gauge 3 monitors the outlet pressure of the high-pressure pump 1 in real time, and feeds back the pressure value to the programming controller 4;

[0044] S10: the programming controller 4 compares and analyzes the current real-time pressure value of the high-pressure pump 1 and the target pressure value, and continues to adjust the air pressure value of the output channel 14 when there is an error, until the real-time pressure value of the water outlet of the high-pressure pump meets the target pressure value.

[0045] Specifically, the programming controller 4 compares and analyzes the current real-time pressure value and the target pressure value of the high-pressure pump 1 to obtain the pressure deviation value, and obtains the adjustment parameter of the electronically controlled proportional valve 5 according to the pressure deviation value in combination with the PID closed-loop control algorithm, and then controls the electric proportional valve to adjust the valve opening to change the overflow valve stroke, and further changes the outlet pressure of the high-pressure pump to make the outlet pressure of the high-pressure pump consistent with the set pressure.

[0046] In another embodiment, the fluid power source is a hydraulic pump, the electrically controlled proportional valve 5 is an electro-hydraulic proportional valve, and the relief valve 2 is a hydraulic relief valve.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A method for regulating the pressure of a high-pressure mining pump based on an electronically controlled proportional valve. Features: An overflow valve and a pressure gauge are connected to the water outlet of the high-pressure pump to control the pressure and flow of the water outlet of the high-pressure pump through the overflow valve, and the water outlet pressure of the high-pressure pump is monitored in real time through the pressure gauge, the overflow valve is connected to an electrically controlled proportional valve, the electrically controlled proportional valve is connected to a fluid power source, and the fluid power source is connected to the overflow valve through the electrically controlled proportional valve, so as to control the opening of the overflow valve through the opening of the electrically controlled proportional valve; The electrically controlled proportional valve and the pressure gauge are both connected to a programmed controller, which adjusts the opening of the electrically controlled proportional valve based on the outlet pressure of the high-pressure pump detected in real time by the pressure gauge to adjust the opening of the overflow valve, thereby adjusting the outlet pressure and flow of the high-pressure pump through the overflow valve.

2. The pressure regulating method for a mining high-pressure pump based on an electronically controlled proportional valve according to claim 1, Features: The fluid power source is an air pump, the electrically controlled proportional valve is an electrical proportional valve, and the relief valve is a pneumatic relief valve.

3. The pressure regulating method for a mining high-pressure pump based on an electronically controlled proportional valve according to claim 1, Features: The fluid power source is a hydraulic pump, the electrically controlled proportional valve is an electro-hydraulic proportional valve, and the relief valve is a hydraulic relief valve.

4. A method for regulating pressure of a high-pressure mining pump based on an electronically controlled proportional valve according to any one of claims 1 to 3, It is characterized in that The voltage regulation method comprises the following steps: Step 1. Set the target pressure value of the water outlet of the high-pressure pump through the programming controller, and the programming controller converts the target pressure value into an electrical signal and transmits it to the electronically controlled proportional valve; Step 2. The electronically controlled proportional valve adjusts its opening according to the electrical signal, thereby adjusting the fluid pressure entering the relief valve. The relief valve passively adjusts the stroke of the main valve core in the relief valve according to the fluid pressure to adjust and change the water outlet pressure of the high-pressure pump; Step 3. At the same time, the pressure gauge feeds back the real-time pressure value monitored in real time to the programmed controller, and the programmed controller compares the target pressure value with the real-time pressure value, and repeats step S2 to further optimize the water outlet pressure of the high-pressure pump.

5. The pressure regulating method for a mining high-pressure pump based on an electronically controlled proportional valve according to claim 4, Features: The programming controller gradually sends the target pressure value electrical signal to the electronically controlled proportional valve according to a certain model, so that the opening of the electronically controlled proportional valve is gradually adjusted to control the gradual increase and decrease of the pressure at the water outlet of the high-pressure pump to avoid the impact caused by sudden increase and decrease of pressure.

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