Portable anti-explosion valve cleaning device

Abstract

The utility model relates to the technical field of valve maintenance equipment, in particular to a portable anti-explosion valve cleaning device, which is characterized in that the polarities of the opposite surfaces of two fixed magnetic field sources are the same, and a movable electromagnetic coil is arranged between the two fixed magnetic field sources; the control unit is used for periodically changing the polarity of current supplied to the movable electromagnetic coil and driving the movable electromagnetic coil to reciprocate, the plunger pump is provided with a grease inlet and a grease outlet, the grease outlet is used for being communicated with a valve to be cleaned, and the grease inlet is used for being communicated with a grease body box; according to the utility model, the electromagnetic driving mechanism is adopted to replace the existing manual driving, so that the pumping-out speed and the working efficiency of cleaning fluid or lubricating grease are improved, the maintenance operation time of a single valve is shortened, and operators are liberated from heavy repeated physical labor.

Description

Technical Field

[0001] This utility model relates to the field of valve maintenance equipment technology, specifically to a portable explosion-proof valve cleaning device, and more particularly to a portable electric cleaning and grease injection device for pipeline valves. Background Technology

[0002] Pipeline transportation systems play a crucial role in the long-distance transportation of energy resources such as oil and natural gas. At key nodes of these pipeline systems, such as valve chambers and station inlets and outlets, numerous valves are typically installed to perform core functions such as shutting off, distributing, and regulating the transported media. Therefore, the performance and operational reliability of these valves directly affect the safe and stable operation of the entire pipeline network.

[0003] Regular maintenance is essential to ensure valve performance during long-term service. Maintenance typically includes effective cleaning of the valve's internal components (such as the valve seat or spherical surface) and application of specialized grease or sealing grease. Thorough cleaning and lubrication not only reduce the valve's opening and closing torque, ensuring smooth operation, but also effectively protect the sealing surfaces, preventing internal leakage due to wear or impurities, thereby significantly extending the valve's service life.

[0004] In current on-site maintenance operations, personnel typically use portable injection equipment to perform cleaning and grease injection. One commonly used device is a foot-operated injection machine, where the operator generates pressure by repeatedly stepping on the pedal to inject cleaning fluid or lubricating grease into the valve.

[0005] However, this traditional foot-operated equipment has some shortcomings in practical use. First, its filling speed is slow, resulting in a long maintenance time for a single valve, and low overall work efficiency when dealing with a large number of valves. Second, this type of equipment is usually large and heavy, causing inconvenience for on-site personnel to carry and move it. In addition, the operation method, which relies entirely on repeated foot pedaling, is very labor-intensive, and prolonged operation can easily cause operator fatigue, thus affecting the quality and efficiency of maintenance work. Utility Model Content

[0006] The technical problem to be solved by this utility model is how to improve the efficiency of valve cleaning and grease injection operations and reduce the labor intensity of operators. The purpose is to provide a portable explosion-proof valve cleaning device that uses the reciprocating motion of an electromagnetic coil for grease injection, eliminating the need for manual operation, significantly improving work efficiency and reducing labor intensity.

[0007] This utility model is achieved through the following technical solution:

[0008] A portable explosion-proof valve cleaning device, comprising:

[0009] Two fixed magnetic field sources are arranged opposite each other, and the polarities of the opposite surfaces of the two fixed magnetic field sources are the same;

[0010] A movable electromagnetic coil is disposed between the two fixed magnetic field sources;

[0011] A control unit, which is electrically connected to the movable electromagnetic coil, is used to periodically change the polarity of the current supplied to the movable electromagnetic coil to drive the movable electromagnetic coil to reciprocate.

[0012] A plunger pump, the drive end of which is connected to the movable electromagnetic coil, is provided with a grease inlet and a grease outlet. The grease outlet is used to communicate with the valve to be cleaned, and the grease inlet is used to communicate with the grease box.

[0013] Optionally, the two fixed magnetic field sources are designated as a first fixed magnetic field source and a second fixed magnetic field source. A first spring is provided between the first fixed magnetic field source and the first end of the movable electromagnetic coil, and a second spring is provided between the second fixed magnetic field source and the second end of the movable electromagnetic coil.

[0014] Optionally, the first fixed magnetic field source, the second fixed magnetic field source, the movable electromagnetic coil, the first spring, and the second spring are all disposed within the sealed body.

[0015] Optionally, the fixed magnetic field source, the movable electromagnetic coil, the control unit, and the plunger pump are all housed within an explosion-proof sealed housing;

[0016] The grease box is disposed inside the explosion-proof sealing housing, and the lid of the grease box extends outside the explosion-proof sealing housing. The explosion-proof sealing housing is provided with a quick connector that communicates with the grease outlet.

[0017] Optionally, the control unit includes a control box, a control board disposed in the control box, and a rechargeable battery. The rechargeable battery is electrically connected to the control board, and the movable electromagnetic coil is electrically connected to the control board through a first connecting line.

[0018] The explosion-proof sealed housing is equipped with a start button, a setting button, and an explosion-proof charging base that are electrically connected to the control board via connecting wires.

[0019] Optionally, the plunger pump includes a grease injection compression chamber and a reciprocating plunger, the reciprocating plunger being disposed in the grease injection compression chamber, and the reciprocating plunger being fixedly connected to the movable electromagnetic coil via a connecting body;

[0020] Both the grease inlet and the grease outlet are located on the grease injection compression chamber. The grease inlet is connected to the grease box through a normal pressure grease inlet channel, and the grease outlet is connected to the quick connector through a high pressure grease outlet channel.

[0021] Optionally, the normal pressure grease inlet channel is provided with a grease inlet check valve pointing to the grease injection compression chamber, and the high pressure grease outlet channel is provided with a grease outlet check valve pointing to the quick connector.

[0022] Optionally, the sealing body is provided with a cavity for accommodating the connector, the reciprocating plunger is inserted into the cavity and fixedly connected to the connector, and the grease injection compression chamber is connected to the sealing body through a sealing packing.

[0023] Optionally, the control box is also equipped with a display screen for displaying operating parameters.

[0024] Optionally, the first fixed magnetic field source and the second fixed magnetic field source are electromagnets, and the first fixed magnetic field source and the second fixed magnetic field source are electrically connected to the control unit through a second connecting line.

[0025] Optionally, the first fixed magnetic field source, the second fixed magnetic field source, and the movable electromagnetic coil share a common iron core.

[0026] Optionally, the first fixed magnetic field source and the second fixed magnetic field source are permanent magnets.

[0027] Optionally, the current supplied by the control unit to the movable electromagnetic coil has a variety of different switching frequencies to achieve a variety of different output speeds.

[0028] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0029] This invention employs an electromagnetic drive mechanism to replace the existing manual drive, improving the pumping speed and efficiency of cleaning fluid or lubricating grease, shortening the maintenance time for a single valve, and freeing operators from heavy, repetitive physical labor. It fundamentally solves the problem of high labor intensity in existing technologies, effectively avoiding physical fatigue caused by prolonged operation and making on-site maintenance work easier. Furthermore, by precisely controlling the commutation frequency of the electromagnetic coil through the control unit, various output speeds can be easily adjusted to adapt to different valve specifications or maintenance conditions, making the device more versatile and intelligent. Attached Figure Description

[0030] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and are included in and constitute a part of this specification, but do not constitute a limitation on the embodiments of the present invention.

[0031] Figure 1 This is a schematic diagram illustrating the principle of a portable explosion-proof valve cleaning device according to the present invention.

[0032] Figure 2 This is a schematic diagram of the reciprocating operation of a portable explosion-proof valve cleaning device according to the present invention.

[0033] Figure label:

[0034] 1-Cover, 2-Explosion-proof charging base, 3-Control box, 4-Control board, 5-Explosion-proof sealed housing, 6-Rechargeable battery, 7-Start button, 8-Setting button, 9-First fixed magnetic field source, 10-First spring, 11-Modable electromagnetic coil, 12-Second spring, 13-Second fixed magnetic field source, 14-Iron core, 15-Sealing body, 16-Cavity, 17-Reciprocating plunger, 18-Grease injection compression chamber, 19-Grease outlet check valve, 20-Grease inlet check valve, 21-Normal pressure grease inlet channel, 22-High pressure grease outlet channel, 23-Quick connector, 24-Connecting wire, 25-Second connecting wire, 26-First connecting wire, 27-Grease box, 28-Connecting body, 29-Sealing packing. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0036] It should also be noted that, for ease of description, only the parts relevant to this utility model are shown in the accompanying drawings.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] Where there is no conflict, the embodiments and features of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] Example 1

[0041] like Figure 1 and Figure 2 As shown, the working process of the portable explosion-proof valve cleaning device disclosed in this embodiment is to convert electrical energy into reciprocating linear motion mechanical energy, and use this mechanical energy to drive a pumping mechanism, thereby realizing the pressurized delivery of grease, specifically including:

[0042] Two fixed magnetic field sources are arranged opposite each other, and the polarities of the opposing surfaces of the two fixed magnetic field sources are the same. A fixed magnetic field source is a component that can generate a stable, unidirectional magnetic field, which can be a permanent magnet or an electromagnet carrying a constant direct current. The magnetic pole faces of the two fixed magnetic field sources facing each other have the same polarity (for example, both are N poles or both are S poles).

[0043] The movable electromagnetic coil 11 is positioned between two fixed magnetic field sources; the movable electromagnetic coil 11 is a coil that generates a magnetic field when energized, and the direction of its magnetic poles depends on the direction of the current flow.

[0044] The control unit is electrically connected to the movable electromagnetic coil 11. The control unit periodically changes the polarity of the current supplied to the movable electromagnetic coil 11, driving it to reciprocate. The function of the control unit is to supply direct current to the movable electromagnetic coil 11 and periodically change the polarity of the current, i.e., periodically reverse the current direction. According to the principles of electromagnetism (like poles repel, unlike poles attract), when the control unit causes one end face of the movable electromagnetic coil 11 to have, for example, an S pole polarity, that end face will be repelled by the nearby fixed magnetic field source (S pole) and attracted by the distant fixed magnetic field source (its outer side is the N pole). Under the combined action of these two forces, the movable electromagnetic coil 11 will move in one direction. When the control unit reverses the current direction in the next cycle, making that end face the N pole, the force situation is completely reversed, and the movable electromagnetic coil 11 will move in the opposite direction. Through this cycle, the movable electromagnetic coil 11 achieves stable and continuous reciprocating motion.

[0045] The plunger pump drive end is connected to the movable electromagnetic coil 11. The plunger pump has a grease inlet and a grease outlet. The grease outlet is used to communicate with the valve to be cleaned, and the grease inlet is used to communicate with the grease box 27. The reciprocating motion of the electromagnetic coil directly drives the plunger to reciprocate within the pump body. When the plunger moves outward, the internal volume of the pump increases, generating negative pressure, and the grease is drawn in from the grease inlet connected to the grease box 27. When the plunger moves inward, the internal volume of the pump decreases, pressurizing the grease and pumping it out at high pressure from the grease outlet, ultimately delivering it to the valve to be cleaned through the pipeline.

[0046] This embodiment utilizes the electromagnetic principle of "like poles repel, unlike poles attract" to periodically reverse the electrodes of the movable electromagnetic coil 11 through a control unit. This causes the coil to reciprocate linearly within a magnetic field environment created by two fixed magnetic field sources with opposite like poles, thereby converting electrical energy into mechanical driving force. This motion is then transmitted to a connected plunger pump, driving it to complete a "suction-pressurization-discharge" cycle for the grease, ultimately achieving automated cleaning or grease injection of the valve.

[0047] The current supplied by the control unit to the movable electromagnetic coil 11 has a variety of different switching frequencies to achieve a variety of different output speeds.

[0048] The control unit precisely controls the rate of change of the polarity of the current supplied to the movable electromagnetic coil 11 by adjusting the switching frequency of its internal circuit. When the control unit changes the current polarity at a higher frequency, the switching speed of the movable electromagnetic coil 11 under the alternating pushing and pulling action in the magnetic field will increase, thereby increasing its reciprocating speed accordingly. Conversely, if the switching frequency is reduced, the reciprocating speed of the electromagnetic coil will decrease.

[0049] For example, two polarity switching frequencies are used to achieve high and low gears, and different oil injection speeds meet the requirements of different working conditions. H is the high-speed gear at 170g / min, and L is the low-speed gear at 110g / min.

[0050] Example 2

[0051] In this embodiment, the structure of the electromagnetic drive system is optimized. The two fixed magnetic field sources are set as the first fixed magnetic field source 9 and the second fixed magnetic field source 13. A first spring 10 is provided between the first fixed magnetic field source 9 and the first end of the movable electromagnetic coil 11, and a second spring 12 is provided between the second fixed magnetic field source 13 and the second end of the movable electromagnetic coil 11.

[0052] When the movable electromagnetic coil 11 reciprocates at high speed and is about to reach the end of its stroke, the spring will be compressed, thereby smoothly absorbing the kinetic energy of the coil and effectively avoiding the rigid impact that may occur between the movable electromagnetic coil 11 and the fixed magnetic field source.

[0053] The first fixed magnetic field source 9, the second fixed magnetic field source 13, the movable electromagnetic coil 11, the first spring 10 and the second spring 12 are all set inside the sealed body 15, which can effectively prevent external dust, moisture and other pollutants from entering.

[0054] The fixed magnetic field source, movable electromagnetic coil 11, control unit and plunger pump are all housed inside the explosion-proof sealed housing 5. The explosion-proof sealed housing 5 has sufficient structural strength so that even if an electric spark or even a small explosion occurs inside the equipment due to an extreme failure, its energy can be completely confined inside the housing and will not leak out to ignite any flammable or explosive gases that may be present in the external environment, thus enhancing safety.

[0055] The grease container 27 is housed within the explosion-proof sealed housing 5, with its lid 1 extending outside the housing. This allows users to easily replenish the grease container 27 without opening the entire housing. The large-capacity grease container 27 reduces the frequency of refilling, improves efficiency, and is suitable for extended operation. Made of transparent material with a transparent glass outer shell, it allows for real-time monitoring of the remaining grease level and facilitates easy refilling.

[0056] The explosion-proof sealed housing 5 is equipped with a quick connector 23 that communicates with the grease outlet. The quick connector 23 is a standardized connection component that allows operators to quickly and securely connect or disconnect high-pressure hoses without tools.

[0057] Example 3

[0058] The control unit includes a control box 3, a control board 4 disposed in the control box 3, and a rechargeable battery 6. The rechargeable battery 6 is electrically connected to the control board 4, and the movable electromagnetic coil 11 is electrically connected to the control board 4 through the first connecting line 26.

[0059] The control board 4 typically refers to a printed circuit board (PCB), which integrates electronic components such as a microprocessor and drive circuits. It is responsible for receiving commands from external buttons and controlling the polarity of the current supplied to the first connecting line 26 of the movable electromagnetic coil 11, thereby driving its movement. The rechargeable battery 6 provides energy to the control board 4 and the entire electromagnetic drive system.

[0060] The explosion-proof sealed housing 5 is equipped with a start button 7, a setting button 8, and an explosion-proof charging base 2, which are electrically connected to the control board 4 via connecting wires 24.

[0061] The explosion-proof charging dock 2 ensures that no electrical sparks are generated when the charger is inserted or removed. The start button 7 and the setting button 8 are user input tools that can control the start and stop of the device and the switching frequency.

[0062] The control box 3 is also equipped with a display screen for displaying working parameters, which can display various working parameters in real time, such as the current output speed level, the time or dosage of grease / cleaning, the remaining battery power, and equipment fault codes.

[0063] Example 4

[0064] This embodiment provides a specific description of the plunger pump, which precisely converts the reciprocating motion of the plunger into a unidirectional, high-pressure output of fluid through the coordinated operation of two one-way valves in opposite directions.

[0065] The plunger pump includes a grease injection compression chamber 18 and a reciprocating plunger 17. The reciprocating plunger 17 is disposed in the grease injection compression chamber 18 and is fixedly connected to the movable electromagnetic coil 11 through a connector 28.

[0066] Both the grease inlet and the grease outlet are located on the grease injection compression chamber 18. The grease inlet is connected to the grease box 27 through the normal pressure grease inlet channel 21, and the grease outlet is connected to the quick connector 23 through the high pressure grease outlet channel 22.

[0067] The normal pressure grease inlet channel 21 is equipped with a grease inlet check valve 20 pointing to the grease injection compression chamber 18, and the high pressure grease outlet channel 22 is equipped with a grease outlet check valve 19 pointing to the quick connector 23.

[0068] Suction stroke: When the electromagnetic drive system drives the reciprocating plunger 17 outward, the internal volume of the grease injection compression chamber 18 increases, creating a negative pressure (vacuum). At this time, the grease inlet check valve 20 in the atmospheric pressure grease inlet channel 21, which is connected to the grease box 27, will automatically open due to the pressure difference, allowing fluid to be sucked into the compression chamber. At the same time, the high pressure at the outlet end will keep the grease outlet check valve 19 in the high pressure grease outlet channel 22 tightly closed, preventing external fluid backflow.

[0069] like Figure 2As shown, during the discharge stroke: when the reciprocating plunger 17 moves inward, it rapidly compresses the fluid in the chamber, causing its pressure to rise sharply. The high pressure will press the grease inlet check valve 20 shut, cutting off the fluid's return path to the grease box 27. At the same time, the high pressure in the chamber will push the grease outlet check valve 19 to open, forcefully pumping the fluid out through the high-pressure grease outlet channel 22 and delivering it via the quick connector 23.

[0070] The sealing body 15 has a cavity 16 for accommodating the connecting body 28. The reciprocating plunger 17 is inserted into the cavity 16 and fixedly connected to the connecting body 28. The grease injection compression chamber 18 is connected to the sealing body 15 via a sealing packing 29. The sealing packing 29 is a dynamic sealing element, commonly used to seal rotating or reciprocating shafts. In this embodiment, its function is to tightly wrap the moving reciprocating plunger 17, allowing it to reciprocate freely while effectively preventing high-pressure fluid in the grease injection compression chamber 18 from leaking out through the gaps in the movement.

[0071] Example 5

[0072] In Option 1, the first fixed magnetic field source 9 and the second fixed magnetic field source 13 are electromagnets, and are electrically connected to the control unit via the second connecting line 25. The first fixed magnetic field source 9, the second fixed magnetic field source 13, and the movable electromagnetic coil 11 share a common iron core 14. The common iron core 14 means that the three coils (two fixed and one movable) are all mounted on a common, continuous iron core 14, which can effectively converge and guide magnetic lines of force to form a highly integrated, closed magnetic circuit.

[0073] Option 2: The first fixed magnetic field source 9 and the second fixed magnetic field source 13 are permanent magnets. Permanent magnets are objects that inherently possess persistent magnetism and can continuously generate a stable magnetic field without external energy supply. Therefore, the control unit no longer needs to power the two fixed magnetic field sources; it can focus solely on controlling the central movable electromagnetic coil 11. This reduces the overall power consumption of the device in standby or operation, thereby effectively extending the battery life of the rechargeable battery 6.

[0074] The reciprocating motion of the electromagnetic coil provides power, avoiding the risks associated with using a motor and improving the explosion-proof effect; the internal circuitry adopts an explosion-proof design, meeting the Class IIB explosion-proof requirements; the explosion-proof housing is made of aluminum alloy, the window is made of explosion-proof glass, the housing is sealed, cables enter and exit through explosion-proof glands, and the battery and circuit board are partitioned to prevent interference, effectively improving the explosion-proof performance.

[0075] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0076] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0077] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications can be made based on the above-described invention, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A portable explosion-proof valve cleaning device, characterized in that, include: Two fixed magnetic field sources are arranged opposite each other, and the polarities of the opposite surfaces of the two fixed magnetic field sources are the same; A movable electromagnetic coil (11) is disposed between the two fixed magnetic field sources; A control unit, which is electrically connected to the movable electromagnetic coil (11), is used to periodically change the polarity of the current supplied to the movable electromagnetic coil (11) to drive the movable electromagnetic coil (11) to reciprocate. A plunger pump, the drive end of which is connected to the movable electromagnetic coil (11), the plunger pump is provided with a grease inlet and a grease outlet, the grease outlet is used to communicate with the valve to be cleaned, and the grease inlet is used to communicate with the grease box (27).

2. A portable pigging apparatus according to claim 1, wherein, The two fixed magnetic field sources are set as a first fixed magnetic field source (9) and a second fixed magnetic field source (13). A first spring (10) is provided between the first fixed magnetic field source (9) and the first end of the movable electromagnetic coil (11), and a second spring (12) is provided between the second fixed magnetic field source (13) and the second end of the movable electromagnetic coil (11).

3. A portable pigging apparatus according to claim 2, wherein, The first fixed magnetic field source (9), the second fixed magnetic field source (13), the movable electromagnetic coil (11), the first spring (10) and the second spring (12) are all disposed inside the sealed body (15).

4. The portable pigging apparatus of claim 3, wherein, The fixed magnetic field source, the movable electromagnetic coil (11), the control unit and the plunger pump are all housed inside the explosion-proof sealed housing (5); The grease box (27) is disposed inside the explosion-proof sealing housing (5), and the lid (1) of the grease box (27) extends to the outside of the explosion-proof sealing housing (5). The explosion-proof sealing housing (5) is provided with a quick connector (23) that communicates with the grease outlet.

5. A portable pigging apparatus according to claim 4, wherein, The control unit includes a control box (3), a control board (4) disposed in the control box (3) and a rechargeable battery (6). The rechargeable battery (6) is electrically connected to the control board (4), and the movable electromagnetic coil (11) is electrically connected to the control board (4) through a first connecting line (26). The explosion-proof sealed housing (5) is equipped with a start button (7), a setting button (8) and an explosion-proof charging base (2) that are electrically connected to the control board (4) via a connecting wire (24).

6. The portable pigging apparatus of claim 4, wherein, The plunger pump includes a grease injection compression chamber (18) and a reciprocating plunger (17). The reciprocating plunger (17) is disposed in the grease injection compression chamber (18) and is fixedly connected to the movable electromagnetic coil (11) through a connector (28). Both the grease inlet and the grease outlet are located on the grease injection compression chamber (18), and the grease inlet is connected to the grease box (27) through the normal pressure grease inlet channel (21), and the grease outlet is connected to the quick connector (23) through the high pressure grease outlet channel (22).

7. A portable pigging apparatus according to claim 6, wherein, The normal pressure grease inlet channel (21) is provided with a grease inlet check valve (20) pointing to the grease injection compression chamber (18), and the high pressure grease outlet channel (22) is provided with a grease outlet check valve (19) pointing to the quick connector (23).

8. The portable pigging apparatus of claim 6, wherein, The sealing body (15) is provided with a cavity (16) for accommodating the connecting body (28). The reciprocating plunger (17) is inserted into the cavity (16) and fixedly connected to the connecting body (28). The grease injection compression chamber (18) is connected to the sealing body (15) through a sealing packing (29).

9. The portable pigging apparatus of claim 5, wherein, The control box (3) is also equipped with a display screen for displaying working parameters.

10. The portable pigging apparatus of claim 2, wherein, The first fixed magnetic field source (9) and the second fixed magnetic field source (13) are electromagnets, and the first fixed magnetic field source (9) and the second fixed magnetic field source (13) are electrically connected to the control unit through the second connecting line (25).

11. A portable pigging apparatus according to claim 10, wherein, The first fixed magnetic field source (9), the second fixed magnetic field source (13) and the movable electromagnetic coil (11) share the same iron core (14).

12. A portable explosion-proof valve cleaning device according to claim 2, characterized in that, The first fixed magnetic field source (9) and the second fixed magnetic field source (13) are permanent magnets.

13. The portable pigging apparatus of claim 1, wherein, The current supplied by the control unit to the movable electromagnetic coil (11) has a variety of different switching frequencies to achieve a variety of different output speeds.

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