A prototype experimental system for unloading pump lift

Abstract

This invention provides a prototype experimental system for unloading pump head, including a folded pipe, a PLC controller, a bottom support, a follow-up support mechanism, a follow-up lifting mechanism, an unloading pump, connecting pipes, and vibration sensors. The follow-up lifting mechanism and the follow-up support mechanism are mounted on the circumferential surface of the folded pipe. This design solves the problem of existing experimental systems requiring the replacement of pipes of different heights. The system includes a telescopic support, a magnetorheological fluid tube, a piston rod, a piston, an electromagnetic coil, and a folded support. This design can raise the support height as the folded pipe extends and can be specifically adjusted according to the different vibrations produced by folded pipes of different heights, thereby ensuring the stability of various positions of the folded pipe, effectively reducing experimental deviations, and solving the problem of the lack of a flexible follow-up support frame in existing experimental systems. Compared with the prior art, this invention has a reasonable structure and improves the safety and accuracy of the invention.

Description

Technical Field

[0001] This invention is a prototype experimental system for unloading pump head, belonging to the field of unloading pump performance testing technology. Background Technology

[0002] Unloading pumps are mainly used to transfer liquids from one container to another. They are commonly used for unloading and transporting oil, chemicals, etc. In the event of a maritime accident, unloading pumps can be used to promptly transfer oil products inside the ship, reduce oil spill pollution, and protect the ecological environment. They are widely used in ports, docks, shipyards, and other places, and are suitable for unloading and transporting various liquids.

[0003] In the existing technology, the existing head prototype test system requires the replacement of pipes of different heights when different head tests are required, which not only increases the experimental steps but also increases the experimental cost. The existing pipes of different head also need to be matched with corresponding support frames, which further increases the cost. There is an urgent need for an unloading pump head prototype test system to solve the above problems. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a prototype experimental system for unloading pump head, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a prototype experimental system for unloading pump head, comprising a folded pipe, a PLC controller, a bottom support, a follower support mechanism, a follower lifting mechanism, an unloading pump, a connecting pipe, and a vibration sensor. The follower lifting mechanism is mounted on the circumferential surface of the folded pipe, and the follower support mechanism is also mounted on the circumferential surface of the folded pipe. The bottom support is mounted on the lower surface of the follower support mechanism, and the PLC controller is mounted inside the bottom support. The unloading pump is located below the folded pipe, and the unloading pump is connected to the folded pipe via the connecting pipe. The connection includes several vibration sensors installed on the surface of the folded pipe, a pipe opening angle adjustment mechanism installed on the upper surface of the folded pipe, an external lifting mechanism including an external lifting pipe, a lifting drive screw, an internal follower rod, a drive wheel, a limit rack, a rack slide rail, a transmission gear, a node support plate, and a bottom connecting plate, a follower support mechanism including a telescopic bracket, a magnetorheological fluid tube, a return spring, a dust cover, a piston rod, a piston, a folding bracket, a connecting plate, and a connecting ring, and a pipe opening angle adjustment mechanism including an adjusting hose, a spherical gear, an angle adjusting gear, an annular base plate, an annular displacement seat, and an annular displacement gear.

[0006] Furthermore, in the follow-up lifting mechanism, node support plates are installed on the circumferential surface of each end of the folded pipe, a bottom connecting plate is installed on the circumferential surface of the lower end of the folded pipe, an external lifting pipe is installed at the lower end of each node, a lifting drive screw is installed inside the external lifting pipe, and an internal follower rod is installed inside the lifting drive screw.

[0007] Furthermore, each of the internal follower rods has two drive wheels installed at its upper end. The internal follower rod passes through the lifting drive screw located above it, and both drive wheels are located inside the corresponding lifting drive screw. The lifting drive screw has two rack slides of different heights inside, and each rack slide has a limit rack installed on its surface.

[0008] Furthermore, each of the drive wheels has only one tooth installed on its circumferential surface, and the tooth on the drive wheel can mesh with the limiting rack. The lifting drive screw has two limiting grooves inside, and the size of one end of the limiting rack is the same as the size of the limiting groove cross-section.

[0009] Furthermore, the lifting drive screw has a follower groove inside, and two follower blocks are installed on the circumferential surface of the internal follower rod. Each follower block is installed inside the corresponding follower groove, and the lowermost lifting drive screw passes through the bottom connecting plate.

[0010] Furthermore, a transmission gear is mounted on the circumferential surface of the lowest lifting drive screw, and two transmission gear shafts are mounted on the lower surface of the bottom connecting plate. Each transmission gear shaft has two transmission gears mounted on its circumferential surface. The transmission gear shaft on the same side is connected to the transmission gear on the lifting drive screw via a transmission belt, and the transmission gears on the two transmission gear shafts are connected to each other via transmission belts. A drive motor is provided below the bottom connecting plate, and the drive motor is connected to the lifting drive screw on one side via a motor shaft.

[0011] Furthermore, in the follow-up support mechanism, telescopic brackets are installed on both sides of the bottom bracket, and four magnetorheological fluid tubes are installed on the inner surface of each telescopic bracket. The magnetorheological fluid tubes are fixedly connected to the telescopic brackets through damping fixing seats, and limit sliders are installed on the surface of the telescopic brackets.

[0012] Furthermore, a piston is installed inside the magnetorheological fluid tube, a piston rod is installed at one end of the piston, the piston rod passes through one end of the magnetorheological fluid tube, a dust cover is installed on the circumferential surface of the piston rod, the inside of the magnetorheological fluid tube is filled with magnetorheological fluid, six flow holes are opened on the surface of the piston, and an electromagnetic coil is installed inside the piston.

[0013] Furthermore, a return spring is installed on the surface of the dust cover, a connecting ring is installed on the circumferential surface of the folded pipe, adjacent connecting rings on the same side are connected by a folding bracket, the piston rod is fixedly connected to the folding bracket by a connecting plate, and the connecting plate is fixedly connected to the rotating shaft in the middle of the corresponding folding bracket.

[0014] Furthermore, each vibration sensor is located on the upper surface of the corresponding connecting ring, the output terminal of the vibration sensor is electrically connected to the input terminal of the PLC controller, and the output terminal of the PLC controller is electrically connected to the input terminal of the electromagnetic coil.

[0015] Furthermore, in the pipe angle adjustment mechanism, the annular base plate is installed on the upper surface of the uppermost node support plate, two annular guide rails are installed on the upper surface of the annular base plate, a guide rail toothed ring is provided between the two annular guide rails, an annular displacement seat is installed on the upper surface of the annular base plate, a guide rail groove is opened on the lower surface of the annular displacement seat, and the annular guide rail is installed inside the guide rail groove.

[0016] Furthermore, a gear bracket is installed on the upper surface of the annular displacement seat, an angle adjustment gear is installed on the inner side of the gear bracket, the adjustment hose is installed at the upper end of the folded pipe, a spherical gear is installed on the circumferential surface of the adjustment hose, the spherical gear meshes with the angle adjustment gear, an adjustment motor is installed on the side surface of the gear bracket, and the adjustment motor is connected to the angle adjustment gear through a motor shaft.

[0017] Furthermore, an annular displacement motor is mounted on the upper surface of the annular displacement seat, and an annular displacement gear is mounted on the lower surface of the annular displacement seat. The annular displacement motor and the annular displacement gear are connected through a motor shaft, and the annular displacement gear meshes with the guide rail ring gear.

[0018] The beneficial effects of the present invention: The prototype experimental system for unloading pump head of the present invention, due to the addition of an external lifting pipe, an internal follower rod of the lifting drive screw, a drive wheel, a limiting rack, a rack slide rail and a transmission gear, can drive the folding pipe to extend section by section, thereby enabling flexible adjustment according to experimental needs and improving the practicality of the present invention.

[0019] Because this invention incorporates a telescopic support, a magnetorheological fluid tube, a return spring, a dust cover, a piston rod, a piston, an electromagnetic coil, and a folding support, the design can increase the support height as the folding pipe extends. Furthermore, it can be specifically adjusted according to the different vibrations generated by folding pipes at different heights, thereby ensuring the stability of each position of the folding pipe, effectively reducing experimental deviations, and improving the safety and accuracy of this invention.

[0020] Because this invention incorporates an adjusting hose, a spherical gear, an angle adjusting gear, an annular base plate, an annular displacement seat, and an annular displacement gear, the design can freely control the final discharge direction of the unloading pump, thereby improving the flexibility and applicability in experiments. Attached Figure Description

[0021] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a prototype experimental system for unloading pump head according to the present invention; Figure 2 This is a bottom view of a prototype experimental system for unloading pump head according to the present invention. Figure 3 This is a cross-sectional schematic diagram of the external riser pipe in a prototype experimental system for unloading pump head according to the present invention. Figure 4 This is a cross-sectional schematic diagram of the lifting drive screw in a prototype experimental system for unloading pump head according to the present invention. Figure 5 This is a schematic diagram of the drive wheel connection in a prototype experimental system for unloading pump head according to the present invention; Figure 6 This is a schematic diagram of the connection of the magnetorheological fluid tube in a prototype experimental system for unloading pump head according to the present invention. Figure 7 This is a cross-sectional schematic diagram of the magnetorheological fluid tube in a prototype experimental system for unloading pump head according to the present invention. Figure 8 This is a cross-sectional schematic diagram of the piston in a prototype experimental system for unloading pump head according to the present invention. Figure 9 This is a three-dimensional schematic diagram of the pipe inlet angle adjustment mechanism in a prototype experimental system for unloading pump head according to the present invention. Figure 10 This is a cross-sectional schematic diagram of the annular displacement seat in a prototype experimental system for unloading pump head according to the present invention. In the diagram: 1-Folded pipe, 2-PLC controller, 3-Bottom bracket, 4-Follow-up support mechanism, 41-Telescopic bracket, 411-Limit slider, 42-Magnetorheological fluid tube, 421-Damping fixing seat, 43-Reset spring, 44-Dust cover, 45-Piston rod, 46-Piston, 461-Electromagnetic coil, 462-Flow through hole, 47-Folded bracket, 48-Connecting plate, 49-Connecting ring, 5-Follow-up lifting mechanism, 51-External lifting pipe, 52-Lifting drive screw, 521-Follow-up groove, 53-Internal follow-up rod, 531-Follow-up block, 54-Drive wheel, 55-Limit tooth 551-Limiting groove, 56-Rack and pinion slide rail, 57-Transmission gear, 571-Transmission gear shaft, 572-Transmission belt, 573-Drive motor, 58-Node support plate, 59-Bottom connecting plate, 6-Unloading pump, 7-Connecting pipe, 8-Vibration sensor, 9-Pipe angle adjustment mechanism, 91-Adjusting hose, 92-Spherical gear, 93-Angle adjustment gear, 931-Adjusting motor, 932-Gear bracket, 94-Annular base plate, 941-Annular guide rail, 942-Guide rail gear ring, 95-Annular displacement seat, 96-Annular displacement gear, 961-Annular displacement motor. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] Please see Figures 1-8 This invention provides a technical solution: a prototype experimental system for unloading pump head, comprising a folded pipe 1, a PLC controller 2, a bottom support 3, a follower support mechanism 4, a follower lifting mechanism 5, an unloading pump 6, a connecting pipe 7, and vibration sensors 8. The follower lifting mechanism 5 is mounted on the circumferential surface of the folded pipe 1, and the follower support mechanism 4 is mounted on the circumferential surface of the folded pipe 1. The bottom support 3 is mounted on the lower surface of the follower support mechanism 4, and the PLC controller 2 is mounted on the inner side of the bottom support 3. The unloading pump 6 is located below the folded pipe 1 and is connected to the folded pipe 1 via the connecting pipe 7. Several vibration sensors 8 are mounted on the surface of the folded pipe 1. The upper surface of the stacked pipe 1 is equipped with a pipe opening angle adjustment mechanism 9. The follow-up lifting mechanism 5 includes an external lifting pipe 51, a lifting drive screw 52, ​​an internal follow-up rod 53, a drive wheel 54, a limit rack 55, a rack slide rail 56, a transmission gear 57, a node support plate 58, and a bottom connecting plate 59. The follow-up support mechanism 4 includes a telescopic bracket 41, a magnetorheological fluid tube 42, a return spring 43, a dust cover 44, a piston rod 45, a piston 46, a folding bracket 47, a connecting plate 48, and a connecting ring 49. The pipe opening angle adjustment mechanism 9 includes an adjusting hose 91, a ball gear 92, an angle adjusting gear 93, an annular base plate 94, an annular displacement seat 95, and an annular displacement gear 96.

[0024] In the follow-up lifting mechanism 5, node support plates 58 are installed on the circumferential surface of each end of the folded pipe 1, and bottom connecting plates 59 are installed on the circumferential surface of the lower end of the folded pipe 1. An external lifting pipe 51 is installed at the lower end of each node support. A lifting drive screw 52 is installed inside the external lifting pipe 51, and an internal follower rod 53 is installed inside the lifting drive screw 52. Two drive wheels 54 are installed at the upper end of each internal follower rod 53. The internal follower rod 53 passes through the lifting drive screw 52 located above it, and the two drive wheels 54 are located inside the corresponding lifting drive screw 52. Two rack slide rails 56 of different heights are set inside the lifting drive screw 52. A limit rack 55 is installed on the surface of each rack slide rail 56. Only one tooth is installed on the circumferential surface of each drive wheel 54, and the tooth on the drive wheel 54 can mesh with the limit rack 55. Two limit grooves 551 are opened inside the lifting drive screw 52. One end of the rack 55 has the same cross-sectional dimension as the limiting groove 551. The lifting drive screw 52 has a follower groove 521 inside. Two follower blocks 531 are installed on the circumferential surface of the internal follower rod 53. Each follower block 531 is installed inside the corresponding follower groove 521. The lowermost lifting drive screw 52 passes through the bottom connecting plate 59. A transmission gear 57 is installed on the circumferential surface of the lowermost lifting drive screw 52. Two transmission gear shafts 571 are installed on the lower surface of the bottom connecting plate 59. Two transmission gears 57 are installed on the circumferential surface of each transmission gear shaft 571. The transmission gear shaft 571 on the same side is connected to the transmission gear 57 on the lifting drive screw 52 through a transmission belt 572. The transmission gears 57 on the two transmission gear shafts 571 are connected to each other through a transmission belt 572. A drive motor 573 is set below the bottom connecting plate 59. The drive motor 573 is connected to the lifting drive screw 52 on one side through a motor shaft.

[0025] In the follow-up support mechanism 4, telescopic brackets 41 are installed on both sides of the bottom bracket 3. Four magnetorheological fluid tubes 42 are installed on the inner surface of each telescopic bracket 41. The magnetorheological fluid tubes 42 are fixedly connected to the telescopic brackets 41 via damping fixing seats 421. Limiting sliders are installed on the surface of the telescopic brackets 41. A piston 46 is installed inside the magnetorheological fluid tube 42. A piston rod 45 is installed at one end of the piston 46, passing through one end of the magnetorheological fluid tube 42. A dust cover 44 is installed on the circumferential surface of the piston rod 45. The inside of the magnetorheological fluid tube 42 is filled with magnetorheological fluid. Six flow holes 46 are opened on the surface of the piston 46. 2. An electromagnetic coil 461 is installed inside the piston 46. A return spring 43 is installed on the surface of the dust cover 44. A connecting ring 49 is installed on the circumferential surface of the folded pipe 1. Adjacent connecting rings 49 on the same side are connected by a folding bracket 47. The piston rod 45 is fixedly connected to the folding bracket 47 by a connecting plate 48. The connecting plate is fixedly connected to the rotating shaft in the middle of the corresponding folding bracket 47. Each vibration sensor 8 is located on the upper surface of the corresponding connecting ring 49. The output end of the vibration sensor 8 is electrically connected to the input end of the PLC controller 2. The output end of the PLC controller 2 is electrically connected to the input end of the electromagnetic coil 461.

[0026] In the pipe angle adjustment mechanism 9, an annular base plate 94 is installed on the upper surface of the uppermost node support plate 58. Two annular guide rails 941 are installed on the upper surface of the annular base plate 94, and a guide rail gear ring 942 is provided between the two annular guide rails 941. An annular displacement seat 95 is installed on the upper surface of the annular base plate 94, and a guide rail groove is opened on the lower surface of the annular displacement seat 95. The annular guide rails 941 are installed inside the guide rail groove. A gear bracket 932 is installed on the upper surface of the annular displacement seat 95, and an angle adjustment gear 93 is installed on the inner side of the gear bracket 932. The adjustment hose 91 is installed on... At the upper end of the folded pipe, a spherical gear 92 is mounted on the circumferential surface of the adjusting hose 91. The spherical gear 92 meshes with the angle adjusting gear 93. An adjusting motor 931 is mounted on the side surface of the gear bracket 932. The adjusting motor 931 and the angle adjusting gear 93 are connected through a motor shaft. An annular displacement motor 961 is mounted on the upper surface of the annular displacement seat 95, and an annular displacement gear 96 is mounted on the lower surface of the annular displacement seat 95. The annular displacement motor 961 and the annular displacement gear 96 are connected through a motor shaft. The annular displacement gear 96 meshes with the guide rail gear ring 942. As an embodiment of the present invention: when it is necessary to raise the height of the folded pipe 1, the drive motor 573 is first turned on. The drive motor 573 drives the two lifting drive screws 52 to rotate through the transmission gear 57 and the transmission belt 572. The two lifting drive screws 52 are connected to the corresponding external lifting pipes 51 by threads. Therefore, when the lifting drive screws 52 rotate, they will drive the external lifting pipes 51 to move upward. At the same time, the internal follower rod 53 inside the lifting drive screw 52 will extend out from the inside of the lifting drive screw 52. Every time the lifting drive screw 52 rotates, it will drive the corresponding drive wheel 54 to rotate once, thereby driving each limiting rack 55 to move one tooth distance until the follower block 531 reaches the uppermost end of the follower groove 521. Then the limiting rack 55 will enter the limiting groove 551, so that the upper lifting drive screw 52 and the lower lifting drive screw 52 can rotate together. At this time, the second section of the folded pipe 1 will be extended, so that it can be flexibly adjusted according to experimental needs, which improves the practicality of the present invention.

[0027] As an embodiment of the present invention: when the vibration sensor 8 senses different vibrations, it transmits an electrical signal to the PLC controller 2. The PLC controller 2 then controls the electromagnetic coil 461 to be energized. The energized electromagnetic coil 461 generates a magnetic field. The magnetorheological fluid in the magnetorheological fluid tube 42 changes its viscosity within the magnetic field. The magnetorheological fluid passes through the flow hole 462. When the viscosity of the magnetorheological fluid changes, the resistance required by the piston 46 will be different. By changing the current of the electromagnetic coil 461 as needed, the damping encountered by the piston 46 can be changed by changing the magnetic field. When the folded pipe 1 is extended, the folded bracket 47 will also unfold. The position of the piston rod 45 is always at the center position of the folded bracket 47. Different heights produce different vibrations, thereby adjusting different damping and improving the safety and accuracy of the present invention.

[0028] As an embodiment of the present invention: when it is necessary to adjust the angle of the adjusting hose 91, the adjusting motor 931 is turned on. The adjusting motor 931 drives the spherical gear 92 to rotate through the angle adjusting gear 93, thereby causing the adjusting hose 91 to bend, and thus adjusting the discharge angle of the unloading pump. When it is necessary to rotate and bend in different directions, the annular displacement motor 961 can be turned on. The annular displacement gear 96 rotates, causing it to rotate along the circumferential surface of the guide rail gear ring 942, thereby driving the annular displacement seat 95 to rotate along the annular guide rail 941. Then, the spherical gear 92 can be controlled to rotate.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An unloading pump head prototype experiment system, comprising a folding pipeline, a PLC controller, a bottom support, a follow-up support mechanism, a follow-up lifting mechanism, an unloading pump, a connecting pipeline and a vibration sensor, characterized in that: A follow-up lifting mechanism is installed on the circumferential surface of the folded pipe, and a follow-up support mechanism is also installed on the circumferential surface of the folded pipe. A bottom bracket is installed on the lower surface of the follow-up support mechanism, and a PLC controller is installed inside the bottom bracket. An unloading pump is located below the folded pipe, and the unloading pump is connected to the folded pipe via a connecting pipe. Several vibration sensors are installed on the surface of the folded pipe, and a pipe opening angle adjustment mechanism is installed on the upper surface of the folded pipe. The follow-up lifting mechanism includes an external lifting pipe, a lifting drive screw, an internal follow-up rod, a drive wheel, a limit rack, a rack slide rail, a transmission gear, a node support plate, and a bottom connecting plate. The follow-up support mechanism includes a telescopic bracket, a magnetorheological fluid tube, a return spring, a dust cover, a piston rod, a piston, a folding bracket, a connecting plate, and a connecting ring. The pipe opening angle adjustment mechanism includes an adjusting hose, a spherical gear, an angle adjusting gear, an annular base plate, an annular displacement seat, and an annular displacement gear.

2. The prototype experimental system for unloading pump head according to claim 1, characterized in that: In the follow-up lifting mechanism, node support plates are installed on the circumferential surface of each end of the folded pipe, and a bottom connecting plate is installed on the circumferential surface of the lower end of the folded pipe. An external lifting pipe is installed at the lower end of each node support, and a lifting drive screw is installed inside the external lifting pipe. An internal follow-up rod is installed inside the lifting drive screw.

3. The prototype experimental system for unloading pump head according to claim 2, characterized in that: Each of the internal follower rods has two drive wheels mounted on its upper end. The internal follower rod passes through the lifting drive screw located above it, and both drive wheels are located inside the corresponding lifting drive screw. The lifting drive screw has two rack slides of different heights inside, and each rack slide has a limit rack mounted on its surface.

4. The prototype experimental system for unloading pump head according to claim 3, characterized in that: Each of the drive wheels has only one tooth installed on its circumferential surface, and the tooth on the drive wheel can mesh with the limiting rack. The lifting drive screw has two limiting grooves inside, and the size of one end of the limiting rack is the same as the size of the limiting groove cross-section.

5. The prototype experimental system for unloading pump head according to claim 4, characterized in that: The lifting drive screw has a follower groove inside, and two follower blocks are installed on the circumferential surface of the internal follower rod. Each follower block is installed in the corresponding follower groove, and the lowermost lifting drive screw passes through the bottom connecting plate.

6. The prototype experimental system for unloading pump head according to claim 5, characterized in that: A transmission gear is mounted on the circumferential surface of the bottom lifting drive screw. Two transmission gear shafts are mounted on the lower surface of the bottom connecting plate. Two transmission gears are mounted on the circumferential surface of each transmission gear shaft. The transmission gear shafts on the same side are connected to the transmission gears on the lifting drive screw via a transmission belt. The transmission gears on the two transmission gear shafts are connected to each other via a transmission belt. A drive motor is located below the bottom connecting plate. The drive motor is connected to the lifting drive screw on one side via a motor shaft.

7. The prototype experimental system for unloading pump head according to claim 2, characterized in that: In the follow-up support mechanism, telescopic brackets are installed on both sides of the bottom bracket, and four magnetorheological fluid tubes are installed on the inner surface of each telescopic bracket. The magnetorheological fluid tubes are fixedly connected to the telescopic brackets through damping fixing seats, and limit sliders are installed on the surface of the telescopic brackets.

8. The prototype experimental system for unloading pump head according to claim 7, characterized in that: A piston is installed inside the magnetorheological fluid tube. A piston rod is installed at one end of the piston. The piston rod passes through one end of the magnetorheological fluid tube. A dust cover is installed on the circumferential surface of the piston rod. The inside of the magnetorheological fluid tube is filled with magnetorheological fluid. Six flow holes are opened on the surface of the piston. An electromagnetic coil is installed inside the piston.

9. A prototype experimental system for unloading pump head according to claim 8, characterized in that: A return spring is installed on the surface of the dust cover, a connecting ring is installed on the circumferential surface of the folded pipe, adjacent connecting rings on the same side are connected by a folding bracket, the piston rod is fixedly connected to the folding bracket by a connecting plate, and the connecting plate is fixedly connected to the rotating shaft in the middle of the corresponding folding bracket.

10. A prototype experimental system for unloading pump head according to claim 8, characterized in that: Each vibration sensor is located on the upper surface of the corresponding connecting ring. The output terminal of the vibration sensor is electrically connected to the input terminal of the PLC controller, and the output terminal of the PLC controller is electrically connected to the input terminal of the electromagnetic coil.

11. The prototype experimental system for unloading pump head according to claim 1, characterized in that: In the pipe angle adjustment mechanism, the annular base plate is installed on the upper surface of the uppermost node support plate. Two annular guide rails are installed on the upper surface of the annular base plate, and a guide rail toothed ring is provided between the two annular guide rails. An annular displacement seat is installed on the upper surface of the annular base plate, and a guide rail groove is opened on the lower surface of the annular displacement seat. The annular guide rail is installed inside the guide rail groove.

12. The prototype experimental system for unloading pump head according to claim 11, characterized in that: A gear bracket is mounted on the upper surface of the annular displacement seat, and an angle adjustment gear is mounted on the inner side of the gear bracket. The adjustment hose is mounted on the upper end of the folded pipe, and a spherical gear is mounted on the circumferential surface of the adjustment hose. The spherical gear meshes with the angle adjustment gear. An adjustment motor is mounted on the side surface of the gear bracket, and the adjustment motor is connected to the angle adjustment gear through a motor shaft.

13. The prototype experimental system for unloading pump head according to claim 12, characterized in that: An annular displacement motor is mounted on the upper surface of the annular displacement seat, and an annular displacement gear is mounted on the lower surface of the annular displacement seat. The annular displacement motor and the annular displacement gear are connected by a motor shaft, and the annular displacement gear meshes with the guide rail gear ring.

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