High-precision plunger pump

Abstract

The invention relates to a high-precision plunger pump, and relates to the technical field of plunger pumps, the high-precision plunger pump comprises a cylinder body, a plunger, a liquid inlet, a liquid outlet and a power assembly, the bottom end of the plunger extends into a cavity of the cylinder body and is in sliding connection with the cylinder body, the cylinder body and the plunger are vertically arranged, and the power assembly is used for driving the plunger to slide back and forth relative to the cylinder body. The liquid inlet and the liquid outlet are both formed in the side wall of the cylinder body, a filter screen is further fixedly arranged in the cylinder body, the filter screen is higher than the liquid inlet and lower than the liquid outlet, and a deslagging assembly is further arranged at the bottom of the cylinder body and used for discharging solid impurities deposited at the bottom of the cylinder body. The plunger pump has the advantages that damage to the plunger pump caused by solid impurities is reduced, and the flow precision and the service life of the plunger pump are guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of plunger pumps, and in particular to a high-precision plunger pump. Background Art

[0002] With the continuous development of social economy and the increasing improvement of scientific and technological levels, my country's industrial level is also improving rapidly. The plunger pump relies on the reciprocating motion of the plunger in the cylinder to change the volume of the sealed working chamber to achieve oil suction and oil pressure. Due to its high rated pressure, compact structure, high efficiency and convenient flow regulation, it is widely used in high pressure, large flow and flow regulation occasions.

[0003] In the related art, the liquid that the plunger pump needs to extract is sometimes mixed with solid impurities. These impurities enter the chamber of the plunger pump along with the liquid. Since the gap between the inner wall of the plunger pump cylinder and the plunger is small, these solid impurities may damage the chamber or plunger of the pump body, thereby compromising the air tightness of the plunger pump, and further affecting the flow accuracy and even the service life of the plunger pump. Summary of the invention

[0004] In order to reduce the damage caused by solid impurities to the plunger pump and ensure the flow accuracy and life of the plunger pump, the present application provides a high-precision plunger pump.

[0005] The high-precision plunger pump provided in this application adopts the following technical solution: A high-precision plunger pump comprises a cylinder body, a plunger, a liquid inlet, a liquid outlet, and a power assembly. The bottom end of the plunger extends into the chamber of the cylinder body and is slidably connected to the cylinder body. The cylinder body and the plunger are both vertically arranged. The power assembly is used to drive the plunger to slide back and forth relative to the cylinder body. The liquid inlet and the liquid outlet are both arranged on the side wall of the cylinder body. A filter screen is also fixedly arranged in the cylinder body, the filter screen is higher than the liquid inlet, and the filter screen is lower than the liquid outlet. A slag discharge assembly is also arranged at the bottom of the cylinder body, and the slag discharge assembly is used to discharge solid impurities deposited at the bottom of the cylinder body.

[0006] By adopting the above technical solution, when the liquid enters the cylinder from the liquid inlet, the filter can filter the solid impurities in the liquid to prevent the solid impurities from entering the gap between the plunger and the cylinder, thereby reducing damage to the pump chamber and the plunger, thereby ensuring the air tightness and accuracy of the plunger pump; and because the filter is higher than the liquid inlet and lower than the liquid outlet, the liquid must be filtered by the filter before entering the liquid outlet, thereby improving the purity of the transported liquid; and the solid impurities deposited at the bottom of the cylinder can be discharged through the slag discharge assembly, further reducing the adverse effects of the solid impurities on the plunger pump, and preventing the solid impurities from excessively accumulating at the bottom of the cylinder.

[0007] Preferably, the slag discharge assembly includes a slag discharge pipe, a spiral rod, a slag collecting bin, and a driving mechanism. The slag discharge pipe is vertically fixed at the bottom of the cylinder body and is communicated with the chamber of the cylinder body. The slag collecting bin is fixedly connected to the slag discharge pipe. The bottom of the slag discharge pipe extends into the slag collecting bin and is communicated with the slag collecting bin. The spiral rod is rotatably arranged in the slag discharge pipe, and the outer wall of the spiral rod is in contact with the inner wall of the slag discharge pipe. The driving mechanism is used to drive the spiral rod to rotate.

[0008] By adopting the above technical solution, when the driving mechanism drives the spiral rod to rotate, since the outer wall of the spiral rod fits the inner wall of the slag discharge pipe, the spiral rod can continuously push the solid impurities deposited at the bottom of the cylinder along the slag discharge pipe into the slag collection bin during the rotation process. It can effectively avoid the blockage of solid impurities in the slag discharge pipe and ensure the continuity of the slag discharge work. Moreover, the slag collection bin also facilitates the centralized collection and subsequent treatment of solid impurities.

[0009] Preferably, the bottom wall of the cylinder chamber is conical, and the top of the slag discharge pipe is located in the center of the bottom wall of the cylinder chamber.

[0010] By adopting the above technical solution, the solid impurities deposited at the bottom of the cylinder can naturally gather to the entrance of the slag discharge pipe under the action of gravity. The conical bottom wall forms a guiding slope, which reduces the adhesion and residue of impurities at the bottom of the cylinder.

[0011] Preferably, the slag discharge assembly also includes a liquid return pipe, which is arranged between the cylinder body and the slag collecting bin, one end of which is fixed and connected to the top of the slag collecting bin, and the other end of which is fixedly connected to the cylinder body and connected to the chamber of the cylinder body.

[0012] By adopting the above technical solution, during the slag discharge process, the liquid in the slag collection bin is pushed to the slag collection bin by the spiral rod together with the solid impurities. Since the top of the slag collection bin is connected to the liquid return pipe, a closed loop space is formed among the cylinder body, the slag discharge pipe, the slag collection bin and the liquid return pipe. However, the space in the slag collection bin is limited. After the slag collection bin is filled with a solid-liquid mixture, the solid impurities in the solid-liquid mixture are deposited at the bottom of the slag collection bin, and the liquid is squeezed back into the chamber of the cylinder body through the liquid return pipe. This allows the liquid to be recycled, improves the use efficiency of the liquid, and reduces unnecessary waste.

[0013] Preferably, a first one-way valve is provided on the liquid return pipe, and the conducting direction of the first one-way valve is toward the cylinder body.

[0014] By adopting the above technical solution, the first one-way valve ensures that the liquid can only flow from the slag collecting bin to the cylinder body, preventing the liquid in the cylinder body from directly flowing back into the slag collecting bin through the return pipe, thereby ensuring the unidirectionality and stability of the liquid circulation during the slag discharge process, preventing the slag discharge work from being interfered with by the backflow of liquid, and making the operation of the entire plunger pump more reliable.

[0015] Preferably, a main frame is further provided outside the cylinder body, the cylinder body is fixed on the main frame, the power assembly includes a rotating shaft, a motor, a tilting plate, and an embedding block, the rotating shaft is vertically and rotatably arranged on the main frame, the motor is fixed on the main frame, the motor is used to drive the rotating shaft to rotate, the tilting plate is fixedly connected to the rotating shaft, the central axis of the tilting plate is inclined, the lower surface of the tilting plate is provided with an embedding groove in the circumferential direction, the embedding block is fixedly connected to the top of the plunger, and the embedding block is embedded and moves in the embedding groove.

[0016] By adopting the above technical solution, when the motor starts to drive the rotating shaft to rotate, the swash plate fixedly connected to the rotating shaft will also rotate. During the rotation of the swash plate, the insert will slide in the insert groove and drive the plunger to perform reciprocating sliding motion relative to the cylinder body, providing power for the oil suction and oil pressure process of the plunger pump.

[0017] Preferably, the driving mechanism includes an incomplete gear, a transmission gear, and an extension shaft. The top of the extension shaft is coaxially fixed with the spiral rod, and the bottom of the extension shaft passes through the bottom wall of the slag collecting bin and extends outside the slag collecting bin. The transmission gear is located outside the slag collecting bin and coaxially fixed with the extension shaft. The incomplete gear is fixedly connected to the rotating shaft, and the incomplete gear can mesh with the transmission gear.

[0018] By adopting the above technical solution, when the motor starts to drive the rotating shaft to rotate, the incomplete gear fixedly connected to the rotating shaft rotates accordingly. Since the incomplete gear can mesh with the transmission gear, when the toothed part of the incomplete gear meshes with the transmission gear during the rotation of the incomplete gear, it will drive the transmission gear to rotate. The transmission gear transmits to the screw rod through the extension shaft, driving the screw rod to rotate, and then only the same power source can be used to realize the sliding drive of the plunger and the rotation drive of the screw rod.

[0019] Preferably, the teeth on the incomplete gear are distributed only on half of the circumference of the incomplete gear, and when the embed block is located at the highest point of the embedding groove, the incomplete gear starts to mesh with the transmission gear, and when the embed block is located at the lowest point of the embedding groove, the incomplete gear is disengaged from the transmission gear.

[0020] By adopting the above technical solution, when the insert is located at the highest point of the insert groove, the plunger is at the top dead center position relative to the cylinder body. At this time, the pump body is in a state of completing the oil suction work and about to start oil pressure. At this moment, the incomplete gear and the transmission gear begin to mesh, and the incomplete gear and the transmission gear begin to drive the screw rod to rotate, and the slag discharge work begins. After the oil pressure work starts, the liquid outlet farther from the bottom of the cylinder body opens, and the liquid outlet closer to the cylinder body closes. Therefore, in this state, the liquid fluidity on the side of the filter screen close to the bottom of the cylinder body is relatively small, and solid impurities are not easily stirred up or re-suspended in the liquid due to the rapid flow of the liquid, and the solid impurity content in the cylinder body reaches the highest value during a cycle of oil suction and oil pressure. At this time, the slag discharge can discharge the solid impurities at the bottom of the cylinder body to the slag collection bin as much as possible, minimizing the amount of liquid entering the slag collection bin. Try to prevent the impurities in the slag collection bin that have not been well settled from being re-flushed and sucked into the cylinder body by a large amount of liquid during slag discharge, thereby improving the purity of the liquid entering the cylinder body. When the insert is located at the lowest point of the slot, the plunger is at the bottom dead center position relative to the cylinder body, and the pump body is in a state of completing oil compression and about to start oil suction. At this time, the incomplete gear is disengaged from the transmission gear, and the slag discharge work stops.

[0021] Preferably, a space adjustment plug is slidably provided in the slag collecting bin, and the outer wall of the space adjustment plug is in contact with the inner wall of the slag collecting bin. An adjustment member is also provided in the slag collecting bin, and the adjustment member is used to drive the space adjustment plug to slide and fix the position of the space adjustment plug.

[0022] By adopting the above technical solution, the effective volume of the slag collecting bin can be flexibly adjusted according to actual needs. When the liquid extracted by the plunger pump has a high content of solid impurities, the space adjustment plug can be driven by the adjustment member to slide in the direction away from the slag discharge pipe, thereby increasing the effective volume of the slag collecting bin to accommodate more solid impurities, reducing the number of slag discharges from the slag collecting bin, and improving the working efficiency of the plunger pump. Conversely, if the content of solid impurities in the liquid is low, the space adjustment plug can be moved in the direction close to the slag discharge pipe by the adjustment member to reduce the effective volume of the slag collecting bin. In this way, the solid impurities in the slag collecting bin can be accumulated to a certain height faster, reducing the liquid content in the slag collecting bin and reducing the waste of liquid.

[0023] Preferably, the adjusting member includes an adjusting screw and a knob, the top of the adjusting screw is rotatably connected to the space adjusting plug, the bottom of the adjusting screw passes through the slag collecting bin and is threadedly connected to the slag collecting bin, the knob is located outside the slag collecting bin, and the knob is coaxially fixed to the adjusting screw.

[0024] By adopting the above technical solution, when the effective volume of the slag collecting bin needs to be adjusted, the operator can do so by turning the knob located outside the slag collecting bin. When the knob is turned forward, the adjusting screw will move in the direction of making the space adjusting plug closer to the slag discharge pipe, thereby reducing the effective volume of the slag collecting bin. When the knob is turned backward, the adjusting screw will drive the space adjusting plug to slide away from the slag discharge pipe, thereby increasing the effective volume of the slag collecting bin.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The filter screen, slag discharge assembly, slag discharge pipe, screw rod, slag collection bin, drive mechanism, liquid return pipe and first one-way valve are provided to help filter impurities and ensure the purity of the liquid transported by the pump body; and push the impurities to the slag collection bin to prevent blockage; the liquid return pipe realizes liquid circulation, so that the liquid in the slag collection bin can re-enter the pump body; 2. By setting the rotating shaft, motor, tilting plate, insert, slot, incomplete gear, transmission gear, and extension shaft, the motor drives the rotating shaft to make the plunger reciprocate to absorb and pressurize oil, and at the same time drives the incomplete gear to control the spiral rod to rotate and discharge slag. And the slag discharge is realized during the oil pressure process to ensure the slag discharge effect; 3. By setting space adjustment plugs, adjustment screws and knobs, the volume of the slag collecting bin can be easily adjusted. When the impurity content is high, the volume can be increased to reduce the number of slag discharges from the slag collecting bin. When the content is low, the volume can be reduced to reduce liquid waste and adapt to different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a high-precision plunger pump provided in an embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of a high-precision plunger pump provided in an embodiment of the present application.

[0028] Figure 3 yes Figure 2 Enlarged view of part A.

[0029] Explanation of the reference numerals in the accompanying drawings: 1. main frame; 2. cylinder body; 21. liquid inlet; 211. second one-way valve; 22. liquid outlet; 221. third one-way valve; 23. filter screen; 3. plunger; 4. power assembly; 41. rotating shaft; 42. motor; 43. tilting plate; 431. embedded groove; 44. embedded block; 5. slag discharge assembly; 51. slag discharge pipe; 52. screw rod; 53. slag collecting bin; 531. space adjustment plug; 532. adjustment screw rod; 533. knob; 534. cleaning port; 535. pillow block; 54. driving mechanism; 541. incomplete gear; 542. transmission gear; 543. extension shaft; 55. liquid return pipe; 551. first one-way valve. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 This application is described in further detail.

[0031] The present application embodiment discloses a high-precision plunger pump. Figure 1 , which includes a main frame 1, a cylinder body 2, a plunger 3, a liquid inlet 21, a liquid outlet 22, and a power assembly 4. The main frame 1 provides a support base for the entire plunger pump, and the cylinder body 2 is fixed on the main frame 1. The bottom end of the plunger 3 extends into the chamber of the cylinder body 2 and is slidably connected to the cylinder body 2. The cylinder body 2 and the plunger 3 are both vertically arranged, and the power assembly 4 is used to drive the plunger 3 to slide back and forth relative to the cylinder body 2.

[0032] Reference Figure 1 and Figure 2 The liquid inlet 21 and the liquid outlet 22 are both arranged on the side wall of the cylinder body 2. The liquid inlet 21 is provided with a second one-way valve 211, which ensures that the liquid can only flow into the cylinder body 2 from the liquid inlet 21. The liquid outlet 22 is provided with a third one-way valve 221, which ensures that the liquid can only flow out of the cylinder body 2 through the liquid outlet 22, preventing the liquid from flowing back and ensuring the normal oil suction and oil pressure functions of the pump body.

[0033] Reference Figure 1 and Figure 2 , a filter screen 23 is also fixed horizontally in the cylinder body 2, and the filter screen 23 is higher than the liquid inlet 21 and lower than the liquid outlet 22. Specifically, the chamber of the cylinder body 2 is divided into a piston chamber and a filter chamber from top to bottom in the vertical direction, and the diameter of the piston chamber is larger than the diameter of the filter chamber. The plunger 3 slides in the piston chamber, and the filter screen 23 is arranged in the filter chamber, and the liquid inlet 21 and the liquid outlet 22 are both connected to the filter chamber. When the liquid enters the cylinder body 2 from the liquid inlet 21, the filter screen 23 filters the solid impurities in the liquid to prevent the solid impurities from entering the gap between the plunger 3 and the cylinder body 2, thereby ensuring the air tightness of the plunger pump and the flow accuracy during stable output, and can improve the purity of the liquid output from the liquid outlet 22. The slag discharge assembly 5 is used to discharge the solid impurities deposited at the bottom of the cylinder body 2.

[0034] Reference Figure 1The power assembly 4 includes a rotating shaft 41, a motor 42, a swash plate 43 and an insert 44. The rotating shaft 41 is vertically and rotatably arranged on the main frame 1, the motor 42 is fixed at the bottom of the main frame 1, and the output shaft of the motor 42 is drivingly connected with the rotating shaft 41 to drive the rotating shaft 41 to rotate. The swash plate 43 is fixedly connected with the top of the rotating shaft 41, the central axis of the swash plate 43 is inclined, and an insert groove 431 is provided on the lower surface of the swash plate 43 along the circumferential direction of the swash plate 43. The insert 44 is fixedly connected with the top of the plunger 3, and the insert 44 is inserted and moves in the insert groove 431. When the motor 42 is started to drive the rotating shaft 41 to rotate, the swash plate 43 rotates accordingly, and the contact part between the insert groove 431 and the insert 44 changes in height with the rotation of the swash plate 43. The insert 44 slides in the insert groove 431 and drives the plunger 3 to make a reciprocating sliding motion relative to the cylinder body 2, providing power for the oil suction and oil pressure process of the plunger pump.

[0035] Reference Figure 2 and Figure 3 The slag discharge assembly 5 includes a slag discharge pipe 51, a spiral rod 52, a slag collection bin 53, a driving mechanism 54 and a liquid return pipe 55. The slag discharge pipe 51 is vertically fixed at the bottom of the cylinder body 2 and is connected to the chamber of the cylinder body 2. The bottom wall of the chamber of the cylinder body 2 (i.e., the bottom wall of the filter chamber) is set in a conical shape, and the top of the slag discharge pipe 51 is located in the center of the bottom wall of the chamber of the cylinder body 2. Under the action of gravity, the solid impurities deposited at the bottom of the cylinder body 2 can naturally converge to the entrance of the slag discharge pipe 51, reducing the attachment and residue of impurities at the bottom of the cylinder body 2. The slag collection bin 53 is fixed on the main frame 1, and the slag collection bin 53 is fixedly connected to the slag discharge pipe 51. The bottom of the slag discharge pipe 51 extends into the slag collection bin 53 and is connected to the slag collection bin 53. Specifically, the bottom of the slag discharge pipe 51 extends to two-thirds of the height of the slag collection bin 53. The spiral rod 52 is rotatably set in the slag discharge pipe 51, and the bottom of the spiral rod 52 extends out of the slag discharge pipe 51. The outer wall of the screw rod 52 is in contact with the inner wall of the slag discharge pipe 51, and the driving mechanism 54 is used to drive the screw rod 52 to rotate. In addition, a cleaning port 534 is provided on the side wall of the slag collecting bin 53, and a gate is provided to seal the cleaning port 534. The gate is connected to the cleaning port 534 through a flange and bolts, and the gate seals the cleaning port 534.

[0036] Reference Figure 2 and Figure 3The driving mechanism 54 includes an incomplete gear 541, a transmission gear 542, and an extension shaft 543. The top of the extension shaft 543 is fixedly connected to the screw rod 52, and the bottom of the extension shaft 543 passes through the bottom wall of the slag collecting bin 53 and extends to the outside of the slag collecting bin 53. Specifically, a shaft block 535 extends upward from the inner bottom wall of the slag collecting bin 53, and the shaft block 535 extends upward from the inner bottom wall of the slag collecting bin 53 to half of the height of the slag collecting bin 53. The extension shaft 543 rotates in the center of the shaft block 535. In addition, in the rotation connection between the extension shaft 543 and the shaft block 535, a coaxial boss with different diameters can be added to the extension shaft 543, and a groove corresponding to the boss is also provided in the shaft block 535, so that the boss rotates in the groove, which increases the axial stability of the extension shaft 543 on the one hand, and helps prevent liquid leakage on the other hand. The transmission gear 542 is located outside the slag collecting bin 53 and is coaxially fixed with the extension shaft 543. The incomplete gear 541 is fixedly connected to the rotating shaft 41 , and the incomplete gear 541 can mesh with the transmission gear 542 .

[0037] Reference Figure 1 and Figure 3 Specifically, the teeth on the incomplete gear 541 are distributed only on half of the circumference of the incomplete gear 541. When the insert 44 is located at the highest point of the insert groove 431, the incomplete gear 541 and the transmission gear 542 begin to mesh, and when the insert 44 is located at the lowest point of the insert groove 431, the incomplete gear 541 and the transmission gear 542 are disengaged.

[0038] Reference Figure 1 and Figure 3 When the motor 42 is started to drive the rotating shaft 41 to rotate, the incomplete gear 541 rotates accordingly. When the toothed portion of the incomplete gear 541 meshes with the transmission gear 542, the transmission gear 542 is driven to rotate, and the transmission gear 542 transmits the power to the screw rod 52 through the extension shaft 543, driving the screw rod 52 to rotate, thereby continuously pushing the solid impurities deposited at the bottom of the cylinder body 2 along the slag discharge pipe 51 into the slag collection bin 53. Only the power source of the motor 42 can realize the sliding drive of the plunger 3 and the rotation drive of the screw rod 52.

[0039] Reference Figure 2 and Figure 3It is worth noting that when the insert 44 is located at the highest point of the insert groove 431, the plunger 3 is at the top dead center position relative to the cylinder body 2. At this time, the pump body is in a state of completing the oil suction work and about to start oil compression. The incomplete gear 541 and the transmission gear 542 begin to mesh, and the screw rod 52 begins to rotate to perform the slag discharge work. After the oil compression work starts, the liquid outlet 22 farther from the bottom of the cylinder body 2 is opened, and the liquid outlet 22 closer to the cylinder body 2 is closed. The liquid fluidity on the side of the filter 23 close to the bottom of the cylinder body 2 is relatively small, and solid impurities are not easily stirred up or re-suspended in the liquid due to the rapid flow of the liquid. The solid impurity content in the cylinder body 2 reaches the highest value during a cycle of oil suction and oil compression. At this time, the slag discharge can discharge the solid impurities at the bottom of the cylinder body 2 to the slag collecting bin 53 as much as possible, minimizing the amount of liquid entering the slag collecting bin 53. When the insert 44 is located at the lowest point of the insert groove 431 (i.e., the state shown in the figure), the plunger 3 is at the bottom dead center position relative to the cylinder body 2, and the pump body is in a state of starting to absorb oil after completing the oil compression. At this time, the incomplete gear 541 is disengaged from the transmission gear 542, and the slag discharge work of the cylinder body 2 stops.

[0040] Reference Figure 2 and Figure 3 The liquid return pipe 55 is arranged between the cylinder body 2 and the slag collecting bin 53, one end of the liquid return pipe 55 is fixed and connected to the top of the slag collecting bin 53, and the other end of the liquid return pipe 55 is fixedly connected to the cylinder body 2 and connected to the chamber of the cylinder body 2. The liquid return pipe 55 is provided with a first one-way valve 551, and the conducting direction of the first one-way valve 551 is toward the cylinder body 2. During the slag discharge process, the liquid in the slag collecting bin 53 is pushed to the slag collecting bin 53 by the screw rod 52 together with the solid impurities. Since the top of the slag collecting bin 53 is connected to the liquid return pipe 55, a closed loop space is formed among the cylinder body 2, the slag discharge pipe 51, the slag collecting bin 53, and the liquid return pipe 55. Since the space in the slag collecting bin 53 is limited, after the slag collecting bin 53 is filled with a solid-liquid mixture, the new solid impurities from the slag discharge pipe 51 will squeeze the liquid in the slag collecting bin 53, and the liquid is squeezed back into the chamber of the cylinder body 2 through the return pipe 55. The first one-way valve 551 ensures that the liquid can only flow from the slag collecting bin 53 to the cylinder body 2, and prevents the liquid in the cylinder body 2 from directly flowing back into the slag collecting bin 53 through the return pipe 55, thereby ensuring the unidirectionality and stability of the liquid circulation during the slag discharge process.

[0041] Reference Figure 3A space adjustment plug 531 is slidably provided in the slag collecting bin 53, the outer wall of the space adjustment plug 531 is fitted with the inner wall of the slag collecting bin 53, the space adjustment plug 531 is sleeved inside and fits with the pillow block 535, and the space adjustment plug 531 can be made of rubber. An adjustment member is also provided in the slag collecting bin 53, and the adjustment member is used to drive the space adjustment plug 531 to slide and fix the position of the space adjustment plug 531. The adjustment member includes an adjustment screw 532 and a knob 533, the top of the adjustment screw 532 is rotatably connected to the space adjustment plug 531, the bottom of the adjustment screw 532 passes through the slag collecting bin 53, and is threadedly connected to the slag collecting bin 53, the knob 533 is located outside the slag collecting bin 53, and the knob 533 is fixedly connected to the adjustment screw 532. When the liquid extracted by the plunger pump has a high content of solid impurities, the space adjustment plug 531 can be driven to slide away from the slag discharge pipe 51 by turning the knob 533, thereby increasing the effective volume of the slag collection bin 53 to accommodate more solid impurities. On the contrary, if the liquid has a low content of solid impurities, the space adjustment plug 531 can be moved toward the slag discharge pipe 51 by the adjustment member, thereby reducing the effective volume of the slag collection bin 53, allowing the solid impurities in the slag collection bin 53 to accumulate to a certain height more quickly, thereby reducing the liquid content in the slag collection bin 53 and reducing the waste of liquid.

[0042] The implementation principle of a high-precision plunger pump in the embodiment of the present application is as follows: when the plunger pump is working, the motor 42 drives the rotating shaft 41 to rotate, the rotating shaft 41 drives the tilting plate 43 to rotate, and the insert 44 changes height along with the insert groove 431, so that the plunger 3 makes a vertical reciprocating sliding motion relative to the cylinder body 2, thereby realizing the oil suction and oil pressure functions of the plunger pump. During the oil suction process, the liquid enters the cylinder body 2 from the liquid inlet 21 through the second one-way valve 211, and the filter screen 23 filters the solid impurities in the liquid; during the oil pressure process, the liquid is discharged from the liquid outlet 22 through the third one-way valve 221. At the same time, during the oil pressure process, the rotating shaft 41 drives the incomplete gear 541 to rotate to mesh with the transmission gear 542, driving the spiral rod 52 to rotate, generating a gravitational force toward the slag collection bin 53, pushing the solid impurities deposited at the bottom of the cylinder body 2 to the slag collection bin 53, and the liquid in the slag collection bin 53 flows back to the cylinder body 2 through the return pipe 55 and the first one-way valve 551.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-precision plunger pump, comprising a cylinder (2), a plunger (3), a liquid inlet (21), a liquid outlet (22), and a power assembly (4), wherein the bottom end of the plunger (3) extends into the chamber of the cylinder (2) and is slidably connected to the cylinder (2), the cylinder (2) and the plunger (3) are both vertically arranged, the power assembly (4) is used to drive the plunger (3) to slide back and forth relative to the cylinder (2), the liquid inlet (21) and the liquid outlet (22) are both arranged on the side wall of the cylinder (2), and is characterized in that: A filter screen (23) is also fixedly arranged in the cylinder body (2), the filter screen (23) is higher than the liquid inlet (21), and the filter screen (23) is lower than the liquid outlet (22). A slag discharge component (5) is also arranged at the bottom of the cylinder body (2), and the slag discharge component (5) is used to discharge solid impurities deposited at the bottom of the cylinder body (2).

2. A high-precision plunger pump according to claim 1, characterized in that: The slag discharge assembly (5) comprises a slag discharge pipe (51), a spiral rod (52), a slag collecting bin (53), and a driving mechanism (54); the slag discharge pipe (51) is vertically fixed to the bottom of the cylinder body (2) and is communicated with the chamber of the cylinder body (2); the slag collecting bin (53) is fixedly connected to the slag discharge pipe (51); the bottom of the slag discharge pipe (51) extends into the slag collecting bin (53) and is communicated with the slag collecting bin (53); the spiral rod (52) is rotatably arranged in the slag discharge pipe (51); the outer wall of the spiral rod (52) is in contact with the inner wall of the slag discharge pipe (51); and the driving mechanism (54) is used to drive the spiral rod (52) to rotate.

3. A high-precision plunger pump according to claim 2, characterized in that: The bottom wall of the chamber of the cylinder body (2) is arranged in a conical shape, and the top of the slag discharge pipe (51) is located in the center of the bottom wall of the chamber of the cylinder body (2).

4. A high-precision plunger pump according to claim 2, characterized in that: The slag discharge assembly (5) further comprises a liquid return pipe (55), wherein the liquid return pipe (55) is arranged between the cylinder body (2) and the slag collecting bin (53), one end of the liquid return pipe (55) is fixed to and connected to the top of the slag collecting bin (53), and the other end of the liquid return pipe (55) is fixedly connected to the cylinder body (2) and connected to the chamber of the cylinder body (2).

5. A high-precision plunger pump according to claim 4, characterized in that: The liquid return pipe (55) is provided with a first one-way valve (551), and the conducting direction of the first one-way valve (551) is toward the cylinder body (2).

6. A high-precision plunger pump according to claim 2, characterized in that: A main frame (1) is also arranged outside the cylinder body (2), the cylinder body (2) is fixed on the main frame (1), the power assembly (4) comprises a rotating shaft (41), a motor (42), a tilting plate (43), and an insert (44), the rotating shaft (41) is vertically and rotatably arranged on the main frame (1), the motor (42) is fixed on the main frame (1), the motor (42) is used to drive the rotating shaft (41) to rotate, the tilting plate (43) is fixedly connected to the rotating shaft (41), the central axis of the tilting plate (43) is inclined, the lower surface of the tilting plate (43) is provided with an insert groove (431) along the circumferential direction, the insert block (44) is fixedly connected to the top of the plunger (3), and the insert block (44) is embedded and moves in the insert groove (431).

7. A high-precision plunger pump according to claim 6, characterized in that: The driving mechanism (54) comprises an incomplete gear (541), a transmission gear (542), and an extension shaft (543); the top of the extension shaft (543) is coaxially fixed to the spiral rod (52); the bottom of the extension shaft (543) passes through the bottom wall of the slag collecting bin (53) and extends outside the slag collecting bin (53); the transmission gear (542) is located outside the slag collecting bin (53) and coaxially fixed to the extension shaft (543); the incomplete gear (541) is fixedly connected to the rotating shaft (41); and the incomplete gear (541) can mesh with the transmission gear (542).

8. A high-precision plunger pump according to claim 7, characterized in that: The teeth on the incomplete gear (541) are distributed only on half of the circumference of the incomplete gear (541), and when the insert (44) is located at the highest point of the insert groove (431), the incomplete gear (541) and the transmission gear (542) begin to mesh, and when the insert (44) is located at the lowest point of the insert groove (431), the incomplete gear (541) and the transmission gear (542) are disengaged.

9. A high-precision plunger pump according to claim 2, characterized in that: A space adjustment plug (531) is slidably arranged in the slag collecting bin (53), and the outer wall of the space adjustment plug (531) is in contact with the inner wall of the slag collecting bin (53). An adjustment member is also arranged in the slag collecting bin (53), and the adjustment member is used to drive the space adjustment plug (531) to slide and fix the position of the space adjustment plug (531).

10. A high-precision plunger pump according to claim 9, characterized in that: The adjusting member comprises an adjusting screw (532) and a knob (533); the top of the adjusting screw (532) is rotatably connected to the space adjusting plug (531); the bottom of the adjusting screw (532) passes through the slag collecting bin (53) and is threadedly connected to the slag collecting bin (53); the knob (533) is located outside the slag collecting bin (53); and the knob (533) is coaxially fixed to the adjusting screw (532).

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