Small flow double-outlet electromagnetic plunger pump

Abstract

The application discloses a small-flow double-outlet electromagnetic plunger pump, which comprises a balance disc, a pump cavity is arranged in a pump body, a pump cover is fixedly arranged on the pump body and is in sealing cooperation with the pump cavity, an inlet and an outlet are arranged on the side wall of the pump cavity, a pressure control assembly is sealingly and fixedly arranged on the outlet, the end of an overflow pipe is sealingly and fixedly arranged on the inlet, an overflow grid is sealingly and fixedly arranged in the overflow pipe, a narrow-neck channel is arranged in the overflow pipe, an electromagnetic assembly is arranged on the pump cover, an oil injection channel is arranged at the bottom of the pump cavity, an anti-backflow assembly is sealingly and fixedly arranged on the outlet of the oil injection channel, a plunger pipe is fixedly arranged in the balance disc, and an oil passing channel is arranged in the plunger pipe. The plunger pipe or the multiple plunger pipes can be controlled to move by the balance disc, the double-outlet or multiple-outlet flow can be formed, the pipeline mechanism for supplying oil to multiple cylinders or multiple systems is simple, resource demand is reduced, and cost is lowered. The double-outlet flow is good in consistency, and the stability of the system is improved.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic plunger pump technology, and in particular to a small-flow dual-outlet electromagnetic plunger pump. Background Technology

[0002] A plunger pump is a hydraulic pump that uses the reciprocating motion of a plunger within a cylinder to create changes in the sealed volume, thus achieving oil suction and pressure. Due to their high pressure, compact structure, high efficiency, and convenient flow regulation, plunger pumps are widely used in systems requiring high pressure, high flow, and high power, as well as in applications where flow regulation is necessary, such as engines, aircraft, ships, broaching machines, hydraulic presses, construction machinery, and mining and metallurgical machinery. Currently, these electromagnetic plunger pumps are mainly single-channel. In multi-cylinder small engine lubrication systems or engine ignition devices, multiple single-channel electromagnetic plunger pumps are sometimes used to construct a piping system to meet the flow requirements during engine lubrication or ignition. Dual-channel or multi-channel output structure plunger pumps can reduce engine resource requirements, simplify piping layout, and offer high reliability. However, these electromagnetic plunger pumps are relatively weak against changes in inlet pressure. Excessive inlet pressure fluctuations can damage the outlet check valve, leading to pump failure. Therefore, additional piping and valves are needed to maintain stable inlet pressure, resulting in complex piping layouts and a large footprint. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a small flow dual-outlet electromagnetic plunger pump.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A small-flow dual-outlet electromagnetic plunger pump includes a pump body, a pump cover, a balance disc, a lifting spring, a plunger tube, a plunger seat, a plunger spring, a plunger sleeve, a plunger ball, a plunger sealing ring, a flow passage pipe, a flow grid, an electromagnetic assembly, a pressure control assembly, and an anti-backflow assembly. The pump body contains a pump chamber. The pump cover is fixedly mounted on the pump body and seals against the pump chamber. The side wall of the pump chamber has a through inlet and an outlet, with the inlet and outlet opposite to each other. The pressure control assembly is sealed and fixedly mounted on the outlet. The end of the flow passage pipe is sealed. The flow passage is fixedly installed at the inlet. A flow gate is sealed and fixedly installed inside the flow passage. A narrow-necked channel is provided inside the flow passage and is located between the flow gate and the pump chamber. The balance disc is slidably installed in the pump chamber and engages with the inner wall of the pump chamber. The electromagnetic component is sealed and fixedly installed on the pump cover and is used to drive the balance disc to slide. A boss that engages with the end face of the balance disc is sealed and fixedly installed at the middle position of the bottom of the pump chamber. A first blind hole is provided on the boss, and one end of the lifting spring is located in the first blind hole. The other end of the lifting spring contacts the balance disc, which has several through-hole balance channels. Two oil injection channels parallel to the moving direction of the balance disc are provided at the bottom of the pump chamber. The anti-backflow assembly is sealed and fixedly installed at the outlet of the oil injection channel. One end of the plunger tube is slidably disposed within the oil injection channel and engages with it. A plunger sealing ring is provided between the inner wall of the oil injection channel and the outer wall of the plunger tube. The other end of the plunger tube is fixedly disposed within the balance disc, and an oil passage is provided within the plunger tube. One end of the oil passage is connected to the oil injection passage, and the other end of the oil passage is connected to the pump chamber. A plunger seat is fixedly installed in the oil passage. One end of the plunger spring is installed on the plunger seat, and the other end of the plunger spring contacts the plunger ball that is slidably installed in the oil passage. The plunger ball is sealed to the end of the plunger sleeve. The plunger sleeve is sealed and fixedly installed on the inner wall of the oil passage and is located close to the pump chamber. A first through hole is provided in the plunger sleeve, and a second through hole is provided on the plunger seat.

[0006] Furthermore, a guide rod is fixedly provided in the middle of the balance disc. One end of the guide rod is provided in the first blind hole and cooperates with the first blind hole. A second blind hole is provided on the end of the guide rod. The end of the lifting spring is provided in the second blind hole. Several through pressure relief holes are provided on the bottom side wall of the second blind hole. The other end of the guide rod is fixedly connected to the electromagnetic component.

[0007] Furthermore, a wear-resistant bushing is provided between the inner wall of the first blind hole and the outer wall of the guide rod.

[0008] Furthermore, the plunger sealing ring is fixed to the oil injection channel by a pressure plate.

[0009] Furthermore, the pressure control assembly includes a pressure control tube, a pressure spring, a pressure end, and a first adjusting inner sleeve. One end of the pressure control tube is sealed and fixedly connected to the outlet. A first stepped hole is provided through the pressure control tube. One end of the pressure spring is fixedly disposed on the bottom of the first stepped hole, and the other end of the pressure spring rests against the pressure end, which is slidably disposed in the first stepped hole. The pressure end is sealed and fitted with the end of the first adjusting inner sleeve. The first adjusting inner sleeve is sealed and fixedly disposed on the inner wall of the first stepped hole and disposed near the outlet side. A first adjusting hole is provided through the first adjusting inner sleeve.

[0010] Furthermore, the anti-backflow assembly includes an anti-backflow control pipe, an anti-backflow spring, an anti-backflow end, and a second adjusting inner sleeve. One end of the anti-backflow control pipe is sealed and fixedly connected to the oil injection channel. A second stepped hole is provided through the anti-backflow control pipe. One end of the anti-backflow spring is fixedly disposed on the bottom of the second stepped hole. The other end of the anti-backflow spring rests against the anti-backflow end, which is slidably disposed in the second stepped hole. The anti-backflow end is sealed and fitted with the end of the second adjusting inner sleeve. The second adjusting inner sleeve is sealed and fixedly disposed on the inner wall of the second stepped hole and is disposed near the oil injection channel. A second adjusting hole is provided through the second adjusting inner sleeve.

[0011] Furthermore, a pump sealing ring is provided between the pump body and the pump cover, and the pump sealing ring is located on the outside of the pump cavity.

[0012] Furthermore, the electromagnetic component includes a coil, an iron core, a push rod, and a return spring. A movable cavity is sealed inside the pump cover. The coil is fixedly mounted on the inner wall of the movable cavity. The iron core is slidably mounted inside the coil. One end of the iron core is fixedly connected to the end of the guide rod via the push rod. The iron core is fixedly connected to the inner wall of the movable cavity via the return spring.

[0013] Furthermore, the inlet and outlet have circular cross-sections and are coaxially arranged, the guide rod has a circular cross-section, the axis of the inlet intersects the axis of the guide rod, the two oil injection channels are symmetrically arranged on both sides of the boss, and the plane containing the axis of the two oil injection channels is perpendicular to the axis of the inlet.

[0014] Furthermore, the centerline of the guide rod, the centerline of the push rod, the centerline of the lifting spring, and the centerline of the return spring are on the same straight line.

[0015] The beneficial effects of this invention are:

[0016] 1) In this technology, by controlling the movement of the plunger tube or multi-plunger tube through a balance disc, dual-outlet or multi-outlet flow can be formed, simplifying the piping structure for supplying oil to multiple cylinders or multiple systems, reducing resource requirements and lowering costs. The dual-outlet flow has good consistency, improving system stability. The design of connecting dual-plunger tubes or multi-plunger tubes through the balance disc can increase the displacement of the plunger pump within the same volume, and further enable the plunger pump to deliver oil independently, allowing for independent on-demand oil supply to different parts of the engine.

[0017] 2) In this technology, the design of the flow tube and narrow neck channel effectively solves the problem of excessive pressure at the inlet of the plunger pump, preventing damage to the plunger pump. The pressure control component is set to control the pressure in the pump chamber within the design range, which is particularly suitable for complex working conditions with large fluctuations in pump inlet pressure. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the electromagnetic plunger pump;

[0019] Figure 2 This is a top view of the electromagnetic plunger pump;

[0020] Figure 3 This is a cross-sectional view (AA) of the electromagnetic plunger pump.

[0021] Figure 4 This is a BB cross-sectional view of the electromagnetic plunger pump when the electromagnetic components are not working.

[0022] Figure 5 This is a cross-sectional view of the electromagnetic components in this electromagnetic plunger pump during operation.

[0023] In the diagram, 1-pump body, 2-pump cover, 3-balance disc, 4-lifting spring, 5-plunger tube, 6-plunger seat, 7-plunger spring, 8-plunger sleeve, 9-plunger ball, 10-plunger seal ring, 11-flow pipe, 12-flow grid, 13-pump chamber, 14-inlet, 15-outlet, 16-narrow neck channel, 17-bore, 18-balance channel, 19-oil injection channel, 20-oil passage, 21-... - Guide rod, 22- Pressure relief hole, 23- Wear-resistant bushing, 24- Pressure plate, 25- Pressure control tube, 26- Pressure spring, 27- Pressure end, 28- First adjusting inner sleeve, 29- Anti-backflow control tube, 30- Anti-backflow spring, 31- Anti-backflow end, 32- Second adjusting inner sleeve, 33- Pump seal ring, 34- Coil, 35- Iron core, 36- Push rod, 37- Reset spring, 38- Movable cavity. Detailed Implementation

[0024] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] See Figures 1-5 The present invention provides a technical solution:

[0026] A small-flow dual-outlet electromagnetic plunger pump includes a pump body 1, a pump cover 2, a balance disc 3, a lifting spring 4, a plunger tube 5, a plunger seat 6, a plunger spring 7, a plunger sleeve 8, a plunger ball 9, a plunger sealing ring 10, a flow passage pipe 11, a flow passage grid 12, an electromagnetic assembly, a pressure control assembly, and an anti-backflow assembly. The pump body 1 contains a pump chamber 13. The pump cover 2 is fixedly mounted on the pump body 1 and sealably fitted with the pump chamber 13. The side wall of the pump chamber 13 has a through inlet 14 and an outlet 15, with the inlet 14 and outlet 15 facing each other. The pressure control assembly is sealed and fixedly mounted on the outlet... At outlet 15, the end of the flow pipe 11 is sealed and fixedly installed at inlet 14. A flow grid 12 is sealed and fixedly installed inside the flow pipe 11. A narrow neck channel 16 is provided inside the flow pipe 11, positioned between the flow grid 12 and pump chamber 13. The balance disc 3 is slidably installed in the pump chamber 13 and engages with the inner wall of the pump chamber 13. An electromagnetic component is sealed and fixedly installed on pump cover 2 and used to drive the balance disc 3 to slide. A boss 17, engaging with the end face of the balance disc 3, is sealed and fixedly installed at the bottom center of the pump chamber 13. A first blind hole is provided on the boss 17. A lifting spring is also provided. One end of the lifting spring 4 is set in the first blind hole, and the other end of the lifting spring 4 contacts the balance disk 3. The balance disk 3 is provided with several through balance channels 18. The bottom of the pump chamber 13 is provided with two oil injection channels 19 parallel to the moving direction of the balance disk 3. The anti-backflow component is sealed and fixedly installed at the outlet of the oil injection channel 19. One end of the plunger tube 5 is slidably installed in the oil injection channel 19 and cooperates with the oil injection channel 19. A plunger sealing ring 10 is provided between the inner wall of the oil injection channel 19 and the outer wall of the plunger tube 5. The other end of the plunger tube 5 is fixedly installed in the balance disk 3. The plunger tube 5 is provided with An oil passage 20 is provided, with one end connected to an oil injection passage 19 and the other end connected to a pump chamber 13. A plunger seat 6 is fixedly installed inside the oil passage 20. One end of a plunger spring 7 is mounted on the plunger seat 6, and the other end of the plunger spring 7 contacts a plunger ball 9 that is slidably mounted inside the oil passage 20. The plunger ball 9 is sealed to the end of a plunger sleeve 8. The plunger sleeve 8 is fixedly mounted on the inner wall of the oil passage 20 and is located close to the pump chamber 13. A first through hole is provided inside the plunger sleeve 8, and a second through hole is provided on the plunger seat 6. A plunger sealing ring 10 is fixed to the oil injection passage 19 by a pressure plate 24. A pump sealing ring 33 is provided between the pump body 1 and the pump cover 2, and the pump sealing ring 33 is located on the outside of the pump chamber 13. The output end of the flow pipe 11 is threadedly sealed to the inlet 14, and the input end of the flow pipe 11 is connected to the oil tank. The pump body 1 and the pump cover 2 are connected by bolts, and the pump sealing ring 33 is set to better seal the pump chamber 13. The purpose of setting the pressure plate 24 is to better fix the plunger sealing ring 10, and the plunger sealing ring 10 is set to prevent leakage between the oil injection channel 19 and the plunger pipe 5.The electromagnetic component provides power for the movement of the balance disc 3. The pressure control component controls the pressure in the pump chamber 13. When the pressure in the pump chamber 13 exceeds a preset value, the pressure control component opens, preventing the pressure in the pump chamber 13 from exceeding the preset value. The anti-backflow component prevents the medium discharged from the anti-backflow component from flowing back. A flow gate 12 filters and depressurizes the medium entering through the flow pipe 11. A narrow-necked channel 16 inside the flow pipe 11 prevents a large amount of medium from returning to the oil tank through the flow pipe 11. The plunger seat 6 secures one end of the plunger spring 7. A seal is achieved between the plunger sleeve 8 and the plunger ball 9. The plunger sleeve 8 is fixed inside the plunger tube 5 by a threaded seal. Multiple sets of plunger tubes 5 and oil injection channels 19 can be provided as needed, not limited to two sets. The medium in this technology is generally oil. In this technology, when the electromagnetic component is not working, the balance disc 3 moves towards the pump cover 2 under the action of the lifting spring 4. The volume between the balance disc 3 and the bottom of the pump chamber 13 increases, creating a negative pressure. The pressure control component and the anti-backflow component are both in a closed state. At this time, the medium enters the pump chamber 13 from the flow pipe 11 through the flow grid 12 and the narrow neck channel 16. Simultaneously, the plunger tube 5 moves with the balance disc 3, and the volume of the pressure-changing chamber between the plunger tube 5 and the anti-backflow control pipe 29 increases, creating a negative pressure. The medium pressure between the balance disc 3 and the pump cover 2 increases and acts on the plunger ball 9. Under this dual action, the plunger ball 9 compresses the plunger spring 7 under pressure, shortening it. The medium between the balance disc 3 and the pump cover 2 flows in through the first through hole on the plunger sleeve 8, then flows through the plunger ball 9 and the plunger tube 5, and then through the second through hole... The two-way hole enters the pressure transformer chamber. When the balance disc 3 contacts the pump cover 2, it stops moving. Then the electromagnetic component starts to work. Under the action of the lifting spring 4, the balance disc 3 moves towards the anti-backflow component. Under the action of the narrow neck channel 16, the medium discharged from the flow pipe 11 is less. The pressure control component will not open if it does not reach the preset value. The plunger sleeve 8 and the plunger ball 9 immediately seal and cooperate. The medium between the balance disc 3 and the bottom of the pump chamber 13 enters between the balance disc 3 and the pump cover 2 through the balance channel 18. At the same time, the volume of the pressure transformer chamber decreases and the pressure of the medium increases, causing the anti-backflow component to open. The medium enters the equipment through the anti-backflow component. When the balance disc 3 contacts the boss 17, the electromagnetic component stops working. Then the balance disc 3 moves towards the pump cover 2 under the action of the lifting spring 4, and a new round of work begins.

[0027] In some embodiments, a guide rod 21 is fixedly disposed in the middle of the balance disc 3. One end of the guide rod 21 is disposed in and cooperates with the first blind hole, and a second blind hole is disposed on the end of the guide rod 21. The end of the lifting spring 4 is disposed in the second blind hole, and a plurality of through pressure relief holes 22 are disposed on the bottom side wall of the second blind hole. The other end of the guide rod 21 is fixedly connected to the electromagnetic assembly. A wear-resistant bushing 23 is disposed between the inner wall of the first blind hole and the outer wall of the guide rod 21. The balance disc 3 is a single plate. The guiding function of the balance disc 3 during movement is relatively poor. The guide rod 21 is set so that the balance disc 3 can only slide along the axis of the guide rod 21. Since the lifting spring 4 is required to drive the balance disc 3 to reset, a second blind hole is set on the guide rod 21 to install the lifting spring 4. In order to prevent the formation of a high-pressure sealing cavity between the first blind hole and the second blind hole, a pressure relief hole 22 is set for pressure relief. The balance disc 3 causes friction to the guide rod 21 during frequent reciprocating motion, so a wear-resistant bushing 23 is set to extend the service life of this plunger pump.

[0028] In some embodiments, the pressure control assembly includes a pressure control tube 25, a pressure spring 26, a pressure end 27, and a first adjusting sleeve 28. One end of the pressure control tube 25 is sealed and fixedly connected to the outlet 15. A first stepped hole is provided through the pressure control tube 25. One end of the pressure spring 26 is fixedly disposed on the bottom of the first stepped hole. The other end of the pressure spring 26 rests against the pressure end 27, which is slidably disposed in the first stepped hole. The pressure end 27 is sealed and fitted with the end of the first adjusting sleeve 28. The first adjusting sleeve 28 is sealed and fixedly disposed on the inner wall of the first stepped hole and disposed near the outlet 15. A first adjusting hole is provided through the first adjusting sleeve 28. The input end of the pressure control pipe 25 is threadedly sealed to the outlet 15. When the pressure in the pump chamber 13 exceeds the preset value, the hydraulic pressure in the pump chamber 13 compresses the pressure spring 26 through the pressure end 27. After the pressure spring 26 is compressed, the medium in the pump chamber 13 is discharged from the output end of the pressure control pipe 25 through the gap between the pressure end 27 and the pressure control pipe 25. Under normal circumstances, the medium discharged from the pressure control pipe 25 returns to the oil tank. When the pressure of the medium in the pump chamber 13 drops below the preset value, the pressure end 27 and the first adjusting inner sleeve 28 are sealed under the action of the pressure spring 26. The first adjusting inner sleeve 28 is provided to facilitate the installation of the pressure spring 26 and the pressure end 27. The first adjusting inner sleeve 28 and the pressure control pipe 25 are threadedly sealed together.

[0029] In some embodiments, the anti-backflow assembly includes an anti-backflow control pipe 29, an anti-backflow spring 30, an anti-backflow end 31, and a second adjusting inner sleeve 32. One end of the anti-backflow control pipe 29 is sealed and fixedly connected to the oil injection channel 19. A second stepped hole is provided through the anti-backflow control pipe 29. One end of the anti-backflow spring 30 is fixedly disposed on the bottom of the second stepped hole, and the other end of the anti-backflow spring 30 rests against the anti-backflow end 31, which is slidably disposed in the second stepped hole. The anti-backflow end 31 is sealed and fitted with the end of the second adjusting inner sleeve 32. The second adjusting inner sleeve 32 is sealed and fixedly disposed on the inner wall of the second stepped hole and is disposed near the oil injection channel 19. A second adjusting hole is provided through the second adjusting inner sleeve 32. The input end of the anti-backflow control pipe 29 is sealed and threadedly connected to the output port of the oil injection channel 19, and the output end of the anti-backflow control pipe 29 enters the equipment through a high-pressure oil pipe. Within the oil injection channel 19, the anti-backflow control pipe 29 and the plunger pipe 5 form a pressure-changing chamber. When the medium pressure in the pressure-changing chamber is greater than the pressure given by the anti-backflow spring 30, the medium in the pressure-changing chamber pushes the anti-backflow end 31 to compress the anti-backflow spring 30. After the anti-backflow spring 30 is compressed, the medium in the pressure-changing chamber enters the output end of the anti-backflow control pipe 29 through the gap between the anti-backflow end 31 and the anti-backflow control pipe 29. After the medium pressure in the pressure-changing chamber decreases, under the action of the anti-backflow spring 30 assembly, a seal is achieved between the second adjusting inner sleeve 32 and the anti-backflow end 31. The purpose of setting the second adjusting inner sleeve 32 is to install the anti-backflow end 31 and the anti-backflow spring 30. The outer wall of the second adjusting inner sleeve 32 and the inner wall of the anti-backflow control pipe 29 are sealed with threaded fit.

[0030] In some embodiments, the electromagnetic assembly includes a coil 34, an iron core 35, a push rod 36, and a return spring 37. A movable cavity 38 is sealed inside the pump cover 2. The coil 34 is fixedly mounted on the inner wall of the movable cavity 38. The iron core 35 is slidably mounted within the coil 34. One end of the iron core 35 is fixedly connected to the end of the guide rod 21 via the push rod 36. The iron core 35 is fixedly connected to the inner wall of the movable cavity 38 via the return spring 37. In this embodiment, the elastic force of the return spring 37 is less than that of the lifting spring 4. When energized, the coil 34 drives the iron core 35 to move towards the lifting spring 4. When de-energized, the iron core 35 compresses the return spring 37 under the action of the lifting spring 4. The movable cavity 38 is a sealed cavity and is connected to the pump chamber 13. The medium in the pump chamber 13 can enter the movable cavity 38 to cool the coil 34. One end of the push rod 36 is fixedly connected to the iron core 35, and the other end of the push rod 36 is connected to the guide rod 21. The iron core 35 drives the guide rod 21 to move through the push rod 36.

[0031] In some embodiments, the inlet 14 and outlet 15 have circular cross-sections and are coaxially arranged. The guide rod 21 has a circular cross-section, and the axis of the inlet 14 intersects the axis of the guide rod 21. Two oil injection channels 19 are symmetrically arranged on both sides of the boss 17, and the plane containing the axis of the two oil injection channels 19 is perpendicular to the axis of the inlet 14. The axis of the guide rod 21, the center line of the push rod 36, the center line of the lifting spring 4, and the center line of the return spring 37 are on the same straight line. The inlet 14 and outlet 15 are symmetrically arranged on both sides of the boss 17, and the two oil injection channels 19 are also symmetrically arranged on the boss 17. The plane containing the two oil injection channels 19 is perpendicular to the straight line containing the inlet 14 and outlet 15. This arrangement makes the pressure in the pump chamber 13 more stable. The guide rod 21, push rod 36, lifting spring 4 and return spring 37 are arranged on the same straight line, so that the balance disc 3 is only subjected to force in the direction of movement and not in other directions, which facilitates the movement of the balance disc 3.

[0032] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "hinged," 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A small-flow dual-outlet electromagnetic plunger pump, characterized in that: The system includes a pump body (1), a pump cover (2), a balance disc (3), a lifting spring (4), a plunger tube (5), a plunger seat (6), a plunger spring (7), a plunger sleeve (8), a plunger ball (9), a plunger sealing ring (10), a flow pipe (11), a flow grid (12), an electromagnetic assembly, a pressure control assembly, and an anti-backflow assembly. The pump body (1) contains a pump chamber (13). The pump cover (2) is fixedly mounted on the pump body (1) and sealed to the pump chamber (13). The side wall of the pump chamber (13) has a through inlet (14) and an outlet (15), with the inlet (14) and outlet (15) facing each other. The pressure control assembly is sealed and fixedly mounted on the outlet (15). The end of the flow pipe (11) is sealed and fixedly disposed on the inlet (14). The flow grid (12) is sealed and fixedly disposed inside the flow pipe (11). A narrow neck channel (16) is disposed inside the flow pipe (11). The narrow neck channel (16) is disposed between the flow grid (12) and the pump chamber (13). The balance disk (3) is slidably disposed in the pump chamber (13) and cooperates with the inner wall of the pump chamber (13). The electromagnetic component is sealed and fixedly disposed on the pump cover (2) and is used to drive the balance disk (3) to slide. A boss (17) that cooperates with the end face of the balance disk (3) is sealed and fixedly disposed at the middle position of the bottom of the pump chamber (13). A first... A blind hole is provided. One end of the lifting spring (4) is set in the first blind hole, and the other end of the lifting spring (4) is in contact with the balance disk (3). The balance disk (3) is provided with several through balance channels (18). The bottom of the pump chamber (13) is provided with two oil injection channels (19) parallel to the moving direction of the balance disk (3). The anti-backflow component is sealed and fixedly set on the outlet of the oil injection channel (19). One end of the plunger tube (5) is slidably set in the oil injection channel (19) and cooperates with the oil injection channel (19). The plunger sealing ring (10) is provided between the inner wall of the oil injection channel (19) and the outer wall of the plunger tube (5). The other end of the plunger tube (5) is fixed. The plunger tube (5) is fixedly installed inside the balance disc (3). An oil passage (20) is provided inside the plunger tube (5). One end of the oil passage (20) is connected to the oil injection channel (19), and the other end of the oil passage (20) is connected to the pump chamber (13). A plunger seat (6) is fixedly installed inside the oil passage (20). One end of the plunger spring (7) is installed on the plunger seat (6), and the other end of the plunger spring (7) is in contact with the plunger ball (9) which is slidably installed inside the oil passage (20). The plunger ball (9) is sealed to the end of the plunger sleeve (8). The plunger sleeve (8) is sealed and fixedly installed on the inner wall of the oil passage (20) and is located close to the pump chamber (13).The plunger sleeve (8) has a through hole, and the plunger seat (6) has a through hole. A guide rod (21) is fixedly provided in the middle of the balance disc (3). One end of the guide rod (21) is provided in the first blind hole and cooperates with the first blind hole. A second blind hole is provided on the end of the guide rod (21). The end of the lifting spring (4) is provided in the second blind hole. Several through pressure relief holes (22) are provided on the bottom side wall of the second blind hole. The other end of the guide rod (21) is fixedly connected to the electromagnetic component.

2. The small-flow dual-outlet electromagnetic plunger pump according to claim 1, characterized in that: A wear-resistant bushing (23) is provided between the inner wall of the first blind hole and the outer wall of the guide rod (21).

3. A small-flow dual-outlet electromagnetic plunger pump according to claim 1 or 2, characterized in that: The plunger sealing ring (10) is fixed on the oil injection channel (19) by the pressure plate (24).

4. A small-flow dual-outlet electromagnetic plunger pump according to claim 1 or 2, characterized in that: The pressure control assembly includes a pressure control tube (25), a pressure spring (26), a pressure end (27), and a first adjusting sleeve (28). One end of the pressure control tube (25) is sealed and fixedly connected to the outlet (15). A first stepped hole is provided through the pressure control tube (25). One end of the pressure spring (26) is fixedly set on the bottom of the first stepped hole. The other end of the pressure spring (26) rests on the pressure end (27) which is slidably set in the first stepped hole. The pressure end (27) is sealed and fitted with the end of the first adjusting sleeve (28). The first adjusting sleeve (28) is sealed and fixedly set on the inner wall of the first stepped hole and is set close to the outlet (15). A first adjusting hole is provided through the first adjusting sleeve (28).

5. A small-flow dual-outlet electromagnetic plunger pump according to claim 1 or 2, characterized in that: The anti-backflow assembly includes an anti-backflow control pipe (29), an anti-backflow spring (30), an anti-backflow end (31), and a second adjusting inner sleeve (32). One end of the anti-backflow control pipe (29) is sealed and fixedly connected to the oil injection channel (19). A second stepped hole is provided through the anti-backflow control pipe (29). One end of the anti-backflow spring (30) is fixedly set on the bottom of the second stepped hole. The other end of the anti-backflow spring (30) rests on the anti-backflow end (31) which is slidably set in the second stepped hole. The anti-backflow end (31) is sealed and fitted with the end of the second adjusting inner sleeve (32). The second adjusting inner sleeve (32) is sealed and fixedly set on the inner wall of the second stepped hole and is set close to the side of the oil injection channel (19). A second adjusting hole is provided through the second adjusting inner sleeve (32).

6. A small-flow dual-outlet electromagnetic plunger pump according to claim 1 or 2, characterized in that: A pump sealing ring (33) is provided between the pump body (1) and the pump cover (2), and the pump sealing ring (33) is located on the outside of the pump cavity (13).

7. A small-flow dual-outlet electromagnetic plunger pump according to claim 1 or 2, characterized in that: The electromagnetic assembly includes a coil (34), an iron core (35), a push rod (36), and a return spring (37). The pump cover (2) is sealed with a movable cavity (38). The coil (34) is fixedly mounted on the inner wall of the movable cavity (38). The iron core (35) is slidably mounted in the coil (34). One end of the iron core (35) is fixedly connected to the end of the guide rod (21) through the push rod (36). The iron core (35) is fixedly connected to the inner wall of the movable cavity (38) through the return spring (37).

8. A small-flow dual-outlet electromagnetic plunger pump according to claim 7, characterized in that: The inlet (14) and outlet (15) have circular cross-sections and are coaxially arranged. The guide rod (21) has a circular cross-section. The axis of the inlet (14) intersects with the axis of the guide rod (21). The two oil injection channels (19) are symmetrically arranged on both sides of the boss (17), and the plane containing the axis of the two oil injection channels (19) is perpendicular to the axis of the inlet (14).

9. A small-flow dual-outlet electromagnetic plunger pump according to claim 8, characterized in that: The centerline of the guide rod (21), the centerline of the push rod (36), the centerline of the lifting spring (4), and the centerline of the return spring (37) are on the same straight line.

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