Parallel double-head four-cylinder piston pump

Abstract

A parallel dual-head four-cylinder plunger pump. This invention aims to solve the problems of existing pumps, such as difficult installation, low installation efficiency, difficulty in increasing and adjusting output flow, and large size of the working device. The technical solution includes a pump head, a first motor, a second motor, a first plunger pump body, a second plunger pump body, a third plunger pump body, a fourth plunger pump body, a first plunger, and a second plunger. Each pump head has an outlet channel and an inlet channel. The first and second plunger pump bodies are symmetrically mounted on the front of the pump head, and the third and fourth plunger pump bodies are symmetrically mounted on the back of the pump head. The first plunger slides with both the first and second plunger pump bodies, and the second plunger slides with both the third and fourth plunger pump bodies. The first motor is mounted on the first and second plunger pump bodies and drives the first plunger. The second motor is mounted on the third and fourth plunger pump bodies and drives the second plunger.

Description

Technical Field

[0001] This utility model relates to a hydraulic pump, and more particularly to a parallel double-headed four-cylinder plunger pump. Background Technology

[0002] A piston pump is the heart of a hydraulic system. It relies on the reciprocating motion of a piston within a cylinder to change the volume of the sealed working chamber, thereby generating pressure changes and driving the pressurized, directional flow of fluid. Because a double-ended piston pump performs two reciprocating strokes for every revolution of the motor shaft, it boasts advantages such as high efficiency, compact structure, uniform flow, and high working pressure.

[0003] A common type of twin-cylinder plunger pump includes a drive motor, plungers, and a pump body. The rear of the pump body is connected to the drive motor. A cam groove is provided in the middle of the plunger, and the cam at the end of the drive motor shaft is housed in the cam groove. The pump body consists of a left pump body and a right pump body. Each of the left and right pump bodies has a plunger chamber and a pressure chamber, which are connected. The two ends of the plunger are respectively housed in the piston chambers of the left and right pump bodies, and a water seal is provided in the piston chamber. Inlet and outlet ports are also provided on the front of the left and right pump bodies, and these ports are connected to the pressure chambers. A one-way valve is provided in both the inlet and outlet ports. A pump head is also connected to the front of the pump body. The pump head has an inlet channel and an outlet channel, which are connected to the inlet and outlet ports, respectively. The inlet and outlet channels are connected to external pipes through inlet and outlet interfaces. A pressure relief channel is also provided between the inlet and outlet channels, and a pressure relief valve is installed in the pressure relief channel. This type of dual-cylinder plunger pump has the following disadvantages: First, because only a rubber water seal is placed between the plunger and the plunger cavity, the alignment of the plunger's reciprocating motion along the central axis of the plunger cavity is poor, often causing friction between the plunger and the plunger cavity wall. After the plunger wears down due to friction, the plunger pump's water pressure will not reach the set value, and the plunger pump will not be durable. Second, the plunger cavity structure is imperfect, making it difficult to manufacture the structure for fixing the rubber sealing ring, and the assembly and replacement of the rubber sealing ring are troublesome.

[0004] Therefore, the applicant previously applied for Chinese Utility Model Patent No. CN204061135U, which describes an improved and durable double-cylinder plunger pump. The pump structure includes a motor and a plunger pump driven by the motor. The plunger pump comprises a left pump body, a right pump body, a pump head, and a plunger. The left and right pump bodies are respectively connected and fixed to the pump head. Each pump body has a pump chamber, an inlet check valve, an outlet check valve, and a plunger cavity connected to the pump chamber. A rubber sealing ring is installed inside the plunger cavity. The plunger consists of a central drive notch and plunger shafts at both ends. The plunger shafts at both ends extend into the plunger cavities of the left and right pump bodies respectively and slide in contact with the rubber sealing rings inside the plunger cavities. A drive cam mechanism is mounted on the motor shaft, and the drive cam mechanism drives the plunger through the drive notch. The pump head has an inlet channel and an outlet channel, which are respectively connected to the pump head. The pump body is connected to an inlet check valve and an outlet check valve, characterized in that: the plunger cavity is a straight hole with a diameter equivalent to the outer diameter of the rubber sealing ring; a sealing plate groove is provided on the pump body outside the plunger cavity opening; a sealing plate for pressing the rubber sealing ring is installed on the sealing plate groove; a plunger hole is provided on the sealing plate; a self-lubricating bushing is tightly fitted on the plunger hole; the plunger shafts at both ends of the plunger are respectively slidably fitted on the self-lubricating bushings of the sealing plates of the left and right pump bodies, and then respectively extend into the plunger cavity to slide with the rubber sealing ring; a sealing ring pressure ring is provided on the outside of the rubber sealing ring in the plunger cavity to press the rubber sealing ring; the sealing plate presses the rubber sealing ring by pressing the sealing ring pressure ring; the plunger shafts at both ends of the plunger extend into the plunger cavity, pass through the sealing ring pressure ring, and then respectively slide with the rubber sealing ring. However, this durable twin-cylinder plunger pump has the following drawbacks: First, due to its somewhat unreasonable pump body structure, the installation requires fitting the rubber sealing ring and sealing ring pressure ring into the plunger cavity one by one, and then fitting the sealing plate into the sealing plate groove on the pump body. It is also important to note that when the sealing plate enters the sealing plate groove, a vertical pushing force must be applied to the exposed end of the rubber sealing ring, making pump body installation difficult and inefficient. Second, due to its structural limitations, the output flow rate of this durable twin-cylinder plunger pump is difficult to increase and is also difficult to adjust conveniently. Third, because the left and right pump bodies are non-contact and independently fixed to the pump head with screws, it is difficult to install them in a coaxial state between the plunger cavities of the left and right pump bodies. This results in uneven friction between the plunger shaft and the rubber sealing ring in the plunger cavity during high-speed reciprocating motion, causing the rubber sealing ring to be less durable and making the plunger cavity prone to leakage, thus reducing the working pressure of the plunger pump.

[0005] Currently, some users connect two of the aforementioned dual-head plunger pumps in series to increase their output flow rate. However, this increases the length of the pump head by about 100%, which makes the working device bulky when installed on it. Therefore, it is not an ideal improved structure. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, such as unreasonable pump body structure leading to difficult and inefficient pump installation, limited output flow due to structural constraints, difficulty in coaxial installation of the plunger cavities of the left and right pump bodies, and the bulky size of the working device resulting from connecting two dual-head plunger pumps in series, the purpose of this invention is to provide an improved parallel dual-head four-cylinder plunger pump that can overcome the deficiencies of existing technologies.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a parallel double-headed four-cylinder plunger pump, characterized in that: it includes a pump head, a first motor, a second motor, a first plunger pump body, a second plunger pump body, a third plunger pump body, a fourth plunger pump body, a first plunger, and a second plunger; wherein the pump head is plate-shaped and has an outlet channel and an inlet channel inside, the outlet channel is connected to the first and second inlet holes on the front of the pump head, the third and fourth inlet holes on the back of the pump head, and the outlet on the side of the pump head, and the inlet channel is connected to the first and second outlet holes on the front of the pump head, the third outlet hole and the fourth inlet hole on the back of the pump head, and the outlet on the side of the pump head; the inlet channel is connected to the first and second outlet holes on the front of the pump head, the third outlet hole and the fourth inlet hole on the back of the pump head, and the outlet. The four water outlets are connected to the water inlet on the side of the pump head; the first plunger pump body is provided with a first pump chamber and a first outlet check valve, a first inlet check valve and a first plunger orifice communicating with the first pump chamber; the second plunger pump body is provided with a second pump chamber and a second outlet check valve, a second inlet check valve and a second plunger orifice communicating with the second pump chamber; the third plunger pump body is provided with a third pump chamber and a third outlet check valve, a third inlet check valve and a third plunger orifice communicating with the third pump chamber; the fourth plunger pump body is provided with a fourth pump chamber and a fourth outlet check valve, a fourth inlet check valve and a fourth plunger orifice communicating with the fourth pump chamber; a first plunger is threaded into the first plunger orifice. The first plunger seat has a through first plunger hole, the second plunger cavity is threadedly fitted with a second plunger seat, the second plunger seat has a through second plunger hole, the third plunger cavity is threadedly fitted with a third plunger seat, the third plunger seat has a through third plunger hole, and the fourth plunger cavity is threadedly fitted with a fourth plunger seat, the fourth plunger seat has a through fourth plunger hole; one end of the first plunger is a first plunger shaft, the other end is a second plunger shaft, and a first drive notch is provided in the middle; one end of the second plunger is a third plunger shaft, the other end is a fourth plunger shaft, and a second drive notch is provided in the middle; the first electric... The output shaft of the first motor is equipped with a first drive eccentric wheel, and the output shaft of the second motor is equipped with a second drive eccentric wheel; rubber sealing rings and rubber limiting washers that slide with the shafts of the first, second, third, and fourth plungers are respectively installed in the first, second, third, and fourth plunger holes; the first plunger pump body and the second plunger pump body are symmetrically mounted on the front of the pump head, with the first plunger hole and the second plunger hole arranged coaxially facing each other; the first outlet check valve and the second outlet check valve are respectively connected to the first inlet hole and the second inlet hole on the front of the pump head; and the first inlet check valve and the second inlet check valve are respectively connected to the first outlet hole and the second outlet hole on the front of the pump head.The third and fourth plunger pump bodies are symmetrically mounted on the back of the pump head. The third and fourth plunger holes are coaxially arranged facing each other. The third and fourth outlet check valves are respectively connected to the third and fourth inlet holes on the back of the pump head. The third and fourth inlet check valves are respectively connected to the third and fourth outlet holes on the back of the pump head. The first plunger shaft of the first plunger is slidably fitted onto the first plunger hole on the first plunger pump body, and its second plunger shaft is slidably fitted onto the... The second plunger shaft of the second plunger is slidably fitted into the third plunger hole on the third plunger pump body, and the fourth plunger shaft is slidably fitted into the fourth plunger hole on the fourth plunger pump body; the first motor is mounted on the first plunger pump body and the second plunger pump body, and its first drive eccentric wheel is fitted into the first drive notch on the first plunger; the second motor is mounted on the third plunger pump body and the fourth plunger pump body, and its second drive eccentric wheel is fitted into the second drive notch on the second plunger.

[0008] The water outlet of the pump head described in the above technical solution can be located at the upper part of the pump head, and its water inlet can be located at the lower part of the pump head. The top side of the water outlet is provided with an upper through hole, and a water pressure gauge, a pressure regulating valve and an air vent valve are connected to the outer opening of the upper through hole on the top side of the pump head.

[0009] The first water inlet hole on the pump head described in the above technical solution can be coaxially arranged with the third water inlet hole, the second water inlet hole can be coaxially arranged with the fourth water inlet hole, the first water outlet hole can be coaxially arranged with the third water outlet hole, and the second water outlet hole can be coaxially arranged with the fourth water outlet hole. This makes the processing more convenient and efficient, and also minimizes the overall length of the pump head, so as to avoid making the working device too bulky when installed in the working device.

[0010] In the above technical solution, the abutment surfaces of the first and second plunger pump bodies, which are symmetrically installed, can be perpendicular to the first plunger hole of the first plunger pump body and the second plunger hole of the second plunger pump body, respectively. Similarly, the abutment surfaces of the third and fourth plunger pump bodies, which are symmetrically installed, can be perpendicular to the third plunger hole of the third plunger pump body and the fourth plunger hole of the fourth plunger pump body, respectively. Thus, when the first and second plunger pump bodies are symmetrically installed, the first and second plunger holes can be in a relatively ideal coaxial state, and when the third and fourth plunger pump bodies are symmetrically installed, the third and fourth plunger holes can be in a relatively ideal coaxial state.

[0011] The first plunger hole seat, the second plunger hole seat, the third plunger hole seat and the fourth plunger hole seat in the above technical solution can adopt the same structure. Their structure can be a cylindrical shell with an external thread on the front of its outer side, an external sealing ring on its outer side behind the external thread, a plunger hole through the central axis in its center, and a mounting and disassembly drive hole on its front end face.

[0012] In the above technical solution, two rubber sealing rings and two rubber limiting washers can be installed in one of the plunger holes. Their arrangement from front to back is as follows: first rubber limiting washer, first rubber sealing ring, second rubber limiting washer, and second rubber sealing ring. The first rubber limiting washer, first rubber sealing ring, second rubber limiting washer, and second rubber sealing ring are arranged to abut against each other.

[0013] The pump head described in the above technical solution can have inlets on both the left and right sides of the pump head, with one inlet open and the other closed; the pump head can also have outlets on both the left and right sides of the pump head, with one outlet open and the other closed. This makes connecting water pipes more convenient and flexible, as both the inlet and outlet can use the inlets and outlets on either the left or right side of the pump head. Only the inlet or outlet that is needed can be opened, and the unused inlet or outlet can be closed.

[0014] The beneficial effects of this utility model are as follows:

[0015] Firstly, because the first plunger cavity is threaded with a first plunger seat and the first plunger seat has a through first plunger hole, the second plunger cavity is threaded with a second plunger seat and the second plunger seat has a through second plunger hole, the third plunger cavity is threaded with a third plunger seat and the third plunger seat has a through third plunger hole, and the fourth plunger cavity is threaded with a fourth plunger seat and the fourth plunger seat has a through fourth plunger hole, and rubber sealing rings and rubber limiting pads that slide with the plunger shaft are installed in the first, second, third, and fourth plunger holes. Therefore, by prefabricating the first, second, third, and fourth plunger hole seats into ready-made components, the ready-made first, second, third, and fourth plunger hole seats can be directly installed onto the first, second, third, and fourth plunger pump bodies during plunger pump installation. This forms the first, second, third, and fourth plunger holes with rubber sealing rings and rubber limiting washers already installed, avoiding the need to install rubber sealing rings and rubber limiting washers into the first, second, third, and fourth plunger hole cavities separately during plunger pump installation, and then install sealing plates outside the first, second, third, and fourth plunger hole cavities, which is difficult to install. This can greatly improve the installation efficiency of the plunger pump.

[0016] Secondly, it includes a pump head, a first motor, a second motor, a first plunger pump body, a second plunger pump body, a third plunger pump body, a fourth plunger pump body, a first plunger, and a second plunger; the first plunger pump body and the second plunger pump body are installed on the front of the pump head, and their first and second outlet check valves are respectively connected to the first and second inlet holes on the front of the pump head, and their first and second inlet check valves are respectively connected to the first and second outlet holes on the front of the pump head; the third and fourth plunger pump bodies are installed on the back of the pump head, and their third and fourth outlet check valves are respectively connected to the third and fourth inlet holes on the back of the pump head, and their third and fourth inlet check valves are respectively connected to the third and fourth outlet holes on the back of the pump head; the first plunger's first... The plunger shaft is slidably fitted on the first plunger hole of the first plunger pump body, the second plunger shaft is slidably fitted on the second plunger hole of the second plunger pump body, the third plunger shaft of the second plunger is slidably fitted on the third plunger hole of the third plunger pump body, and the fourth plunger shaft is slidably fitted on the fourth plunger hole of the fourth plunger pump body. The first motor is mounted on the first and second plunger pump bodies, and its first drive eccentric wheel is fitted with the first drive notch on the first plunger. The second motor is mounted on the third and fourth plunger pump bodies, and its second drive eccentric wheel is fitted with the second drive notch on the second plunger. Therefore, the plunger pump has the ability to work with four cylinders simultaneously, which effectively improves the output flow rate. Moreover, it can be selected between working with two cylinders and working with four cylinders, so it is convenient to adjust the output flow rate and expand the application range of the plunger pump.

[0017] Thirdly, because the first and second plunger pump bodies are symmetrically abutted and installed on the front of the pump head, with their first and second plunger cavities arranged coaxially in opposite directions, and the third and fourth plunger pump bodies are symmetrically abutted and installed on the back of the pump head, with their first and second plunger cavities arranged coaxially in opposite directions, it is easy and convenient to ensure that the first and second plunger cavities, as well as the third and fourth plunger cavities, are all in a coaxial state when installing the plunger pump. This makes the frictional resistance between the first and second plungers and the rubber sealing rings inside the plunger holes more uniform when the first and second plungers reciprocate at high speed, effectively improving the durability of the rubber sealing rings and overcoming the problem of easy leakage from the plunger holes causing a drop in plunger pump pressure.

[0018] Fourth, because the plunger pump adopts a parallel structure, that is, the first and second plunger pump bodies are installed on the front of the pump head, and the third and fourth plunger pump bodies are installed on the back of the pump head, the length of the pump head can be effectively shortened, thereby avoiding the problem of the working device being too large when installed on the working device.

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of one embodiment of the present invention.

[0021] Figure 2 yes Figure 1 A three-dimensional schematic diagram showing the separation of the first motor and the second motor.

[0022] Figure 3 yes Figure 2 A three-dimensional schematic diagram showing the first plunger pump body, the second plunger pump body, and the first plunger assembly separated from the pump head.

[0023] Figure 4 yes Figure 2 A three-dimensional schematic diagram showing the separation of the third plunger pump body, the fourth plunger pump body, and the second plunger assembly from the pump head.

[0024] Figure 5 yes Figure 3 A component separation diagram of the first plunger pump body, the second plunger pump body, and the first plunger assembly.

[0025] Figure 6 yes Figure 4 The component separation diagram of the third plunger pump body, the fourth plunger pump body, and the second plunger assembly.

[0026] Figure 7 yes Figure 5 and Figure 6 Enlarged cross-sectional view of the first, second, third, or fourth plunger hole seat.

[0027] In the diagram: 1. Pump head; 2. First motor; 3. Second motor; 4. First plunger pump body; 5. Second plunger pump body; 6. Third plunger pump body; 7. Fourth plunger pump body; 8. First plunger; 9. Second plunger; 10. Front of pump head; 11. First inlet; 12. Second inlet; 13. Back of pump head; 14. Third inlet; 15. Fourth inlet; 16. Outlet; 17. First outlet. 18. Second outlet; 19. Third outlet; 20. Fourth outlet; 21. Inlet; 22. First outlet check valve; 23. First inlet check valve; 24. First plunger cavity; 25. Second outlet check valve; 26. Second inlet check valve; 27. Third outlet check valve; 28. Third inlet check valve; 29. ​​Third plunger cavity; 30. Fourth outlet check valve; 31. Fourth inlet check valve 31. Valve; 32. First plunger seat; 33. First plunger hole; 34. Second plunger seat; 35. Second plunger hole; 36. Third plunger seat; 37. Third plunger hole; 38. Fourth plunger seat; 39. Fourth plunger hole; 40. First plunger shaft; 41. Second plunger shaft; 42. First drive notch; 43. Third plunger shaft; 44. Fourth plunger shaft; 45. Second drive notch; 46. First drive eccentric wheel; 47. Second drive eccentric wheel; 48. Water pressure gauge; 49. Pressure regulating valve; 50. Air vent valve; 51. First abutment surface; 52. Second abutment surface; 53. Cylindrical housing; 54. External thread; 55. External sealing ring; 56. Plunger hole; 57. Installation and removal drive hole; 58. First rubber limiting washer; 59. First rubber sealing ring; 60. Second rubber limiting washer; 61. Second rubber sealing ring. Detailed Implementation

[0028] Reference Figures 1-6This parallel dual-head four-cylinder plunger pump is characterized by comprising a pump head 1, a first motor 2, a second motor 3, a first plunger pump body 4, a second plunger pump body 5, a third plunger pump body 6, a fourth plunger pump body 7, a first plunger 8, and a second plunger 9; wherein the pump head 1 is plate-shaped and has an outlet channel and an inlet channel inside; the outlet channel communicates with the first inlet hole 11 and the second inlet hole 12 on the front side 10 of the pump head 1, the third inlet hole 14 and the fourth inlet hole 15 on the back side 13 of the pump head 1, and the outlet 16 on the side of the pump head 1; the inlet channel communicates with the first outlet hole 17 and the second outlet hole 18 on the front side 10 of the pump head 1, and the... The third outlet hole 19 and the fourth outlet hole 20 on the back 13 of the pump head 1 are connected to the inlet 21 on the side of the pump head 1; the first plunger pump body 4 is provided with a first pump chamber and a first outlet check valve 22, a first inlet check valve 23 and a first plunger orifice 24 connected to the first pump chamber; the second plunger pump body 5 is provided with a second pump chamber and a second outlet check valve 25, a second inlet check valve 26 and a second plunger orifice (not shown) connected to the second pump chamber; the third plunger pump body 6 is provided with a third pump chamber and a third outlet check valve 27, a third inlet check valve 28 and a third plunger orifice 29 connected to the third pump chamber; the fourth plunger pump body 7 is provided with... The fourth pump chamber and the fourth outlet check valve 30, the fourth inlet check valve 31, and the fourth plunger orifice (not shown) connected to the fourth pump chamber; the first plunger orifice 24 is threadedly fitted with a first plunger orifice seat 32, and the first plunger orifice seat 32 is provided with a through first plunger hole 33; the second plunger orifice 29 is threadedly fitted with a second plunger orifice seat 34, and the second plunger orifice seat 34 is provided with a through second plunger hole 35; the third plunger orifice 29 is threadedly fitted with a third plunger orifice seat 36, and the third plunger orifice seat 36 is provided with a through third plunger hole 37; the fourth plunger orifice 29 is threadedly fitted with a fourth plunger orifice seat 38, and the fourth plunger orifice seat 38 is provided with a through third plunger hole 37. A through fourth plunger hole 39 is provided; one end of the first plunger 8 is a first plunger shaft 40, and the other end is a second plunger shaft 41, with a first drive notch 42 in the middle; one end of the second plunger 9 is a third plunger shaft 43, and the other end is a fourth plunger shaft 44, with a second drive notch 45 in the middle; a first drive eccentric wheel 46 is mounted on the output shaft of the first motor 2, and a second drive eccentric wheel 47 is mounted on the output shaft of the second motor 3; rubber sealing rings and rubber limiting washers that slide with the first, second, third, and fourth plunger shafts 40, 41, 43, and 44 are respectively installed in the first, second, third, and fourth plunger holes 33, 35, 37, and 39;The first plunger pump body 4 and the second plunger pump body 5 are symmetrically mounted on the front side 10 of the pump head 1, with the first plunger hole 33 and the second plunger hole 35 arranged coaxially facing each other. The first outlet check valve 22 and the second outlet check valve 25 are respectively connected to the first inlet hole 11 and the second inlet hole 12 of the front side 10 of the pump head 1, and the first inlet check valve 23 and the second inlet check valve 26 are respectively connected to the first outlet hole 17 and the second outlet hole 18 of the front side 10 of the pump head 1. The third plunger pump body 6 and the fourth plunger pump body 7 are symmetrically mounted on the back side 13 of the pump head 1, with the third plunger hole 37 and the fourth plunger hole 39 arranged coaxially facing each other. The third outlet check valve 27 and the fourth outlet check valve 30 are respectively connected to the third inlet hole 14 and the fourth inlet hole 15 of the back side 13 of the pump head 1, and the third inlet check valve 28 and the fourth inlet check valve 39 are respectively connected to the third inlet hole 14 and the fourth inlet hole 15 of the back side 13 of the pump head 1. One-way valve 31 is connected to the third outlet hole 19 and the fourth outlet hole 20 on the back side 13 of the pump head 1, respectively; the first plunger shaft 40 of the first plunger 8 is slidably fitted on the first plunger hole 33 on the first plunger pump body 4, and its second plunger shaft 41 is slidably fitted on the second plunger hole 35 on the second plunger pump body 5; the third plunger shaft 43 of the second plunger 9 is slidably fitted on the third plunger hole 37 on the third plunger pump body 6, and its fourth plunger shaft 44 is slidably fitted on the fourth plunger hole 39 on the fourth plunger pump body 7; the first motor 2 is mounted on the first plunger pump body 4 and the second plunger pump body 5, and its first drive eccentric wheel 46 is fitted with the first drive notch 42 on the first plunger 8; the second motor 3 is mounted on the third plunger pump body 6 and the fourth plunger pump body 7, and its second drive eccentric wheel 47 is fitted with the second drive notch 45 on the second plunger 9.

[0029] In addition, the water outlet of the pump head 1 is located at the upper part of the pump head 1, and its water inlet is located at the lower part of the pump head 1. The top side of the water outlet is provided with an upper through hole, and the outer opening of the upper through hole on the top side of the pump head 1 is connected to a water pressure gauge 48, a pressure regulating valve 49 and an air vent valve 50.

[0030] The first water inlet hole 11 and the third water inlet hole 14 on the pump head 1 are coaxially arranged, the second water inlet hole 12 and the fourth water inlet hole 15 are coaxially arranged, the first water outlet hole 17 and the third water outlet hole 19 are coaxially arranged, and the second water outlet hole 18 and the fourth water outlet hole 20 are coaxially arranged. This makes the processing more convenient and efficient, and can minimize the overall length of the pump head 1, so as to avoid making the working device too bulky when installed on the working device.

[0031] The first abutment surface 51 of the first plunger pump body 4 and the second plunger pump body 5, which are symmetrically abutted together, is perpendicular to the hole axis of the first plunger hole 33 on the first plunger pump body 4 and the second plunger hole 35 on the second plunger pump body 5, respectively. The second abutment surface 52 of the third plunger pump body 6 and the fourth plunger pump body 7, which are symmetrically abutted together, is perpendicular to the hole axis of the third plunger hole 37 on the third plunger pump body 6 and the fourth plunger hole 39 on the fourth plunger pump body 7, respectively. In this way, when the first plunger pump body 4 and the second plunger pump body 5 are symmetrically abutted together, the first plunger hole 33 and the second plunger hole 35 can be in a relatively ideal coaxial state. When the third plunger pump body 6 and the fourth plunger pump body 7 are symmetrically abutted together, the third plunger hole 37 and the fourth plunger hole 39 can be in a relatively ideal coaxial state.

[0032] The first plunger seat 32, the second plunger seat 34, the third plunger seat 36 and the fourth plunger seat 38 adopt the same structure. Their structure is a cylindrical shell 53 with an external thread 54 on the front of its outer side, an external sealing ring 55 on the outer side behind the external thread 54, a plunger hole 56 passing through the central axis in the center, and a mounting and disassembly drive hole 57 on the front end face.

[0033] Reference Figure 7 Two rubber sealing rings and two rubber limiting washers are respectively installed in the cylindrical housing 53 of the first plunger seat 32, the second plunger seat 34, the third plunger seat 36 and the fourth plunger seat 38. Their arrangement from front to back is the first rubber limiting washer 58, the first rubber sealing ring 59, the second rubber limiting washer 60 and the second rubber sealing ring 61. The first rubber limiting washer 58, the first rubber sealing ring 59, the second rubber limiting washer 60 and the second rubber sealing ring 61 are arranged to abut against each other.

[0034] The pump head 1 has inlet ports 21 on both its left and right sides, with one inlet port 21 open and the other closed. The pump head 1 also has outlet ports 16 on both its left and right sides, with one outlet port 16 open and the other closed. This design makes connecting water pipes convenient and flexible. Both the inlet and outlet ports can be accessed from either the left or right side of the pump head. Only the port that is needed can be opened, and the unused port can be closed.

[0035] In use, a low-pressure water inlet pipe is connected to the inlet 21 of the pump head 1, and a high-pressure water outlet pipe is connected to its outlet 16. When the power supply to the first motor 2 is turned on, the first motor 2 drives the first drive notch 42 of the first plunger 8 through the first drive eccentric wheel 46, causing the first plunger 8 to reciprocate left and right. This changes the volume and water pressure of the first pump chamber in the first plunger pump body 4 and the second pump chamber in the second plunger pump body 5, so that the external low-pressure water inlet pipe passes through the inlet of the pump head 1. 21. Water then enters the first pump chamber of the first plunger pump body 4 and the second pump chamber of the second plunger pump body 5 through the first inlet check valve 23 and the second inlet check valve 26. The water is pressurized by the first plunger shaft 40 and the second plunger shaft 41 of the first plunger 4 in the first pump chamber of the first plunger pump body 4 and the second pump chamber of the second plunger pump body 5, respectively. Then, it is alternately delivered pressurized water to the outlet channel on the pump head 1 through the first outlet check valve 23 and the second outlet check valve 26. The pressurized water then flows through the pump head... The water outlet 16 on pump head 1 delivers water to the external high-pressure water pipe. When the power supply to the second motor 3 is turned on, the second motor 3 drives the second drive notch 45 of the second plunger 9 through the second drive eccentric wheel 47 on it, causing the second plunger 9 to reciprocate left and right, thereby changing the volume and water pressure of the third pump chamber in the third plunger pump body 6 and the fourth pump chamber in the fourth plunger pump body 7. This causes the external low-pressure water inlet pipe to pass through the water inlet 21 of pump head 1, then through the third water inlet check valve 28 and the fourth water inlet valve 7. One-way valve 31 allows water to enter the third pump chamber within the third plunger pump body 6 and the fourth pump chamber within the fourth plunger pump body 7. The water is pressurized by the third plunger shaft 43 and the fourth plunger shaft 44 of the second plunger 9 within the third pump chamber of the third plunger pump body 6 and the fourth pump chamber of the fourth plunger pump body 7, respectively. Then, it is alternately delivered to the outlet channel on the pump head 1 via the third outlet one-way valve 27 and the fourth outlet one-way valve 30, providing pressurized water supply. The pressurized water supply is then delivered to an external high-pressure water pipe via the outlet 16 on the pump head 1. By controlling the first motor 2 and the second motor 3 to operate simultaneously or selectively, and by adjusting the speeds of the first motor 2 and the second motor 3, the pressurized water supply volume of the pump head 1 can be controlled. Since the plunger pump of this invention has four plunger cylinders operating, the pressurized water supply flow rate can be effectively increased.

Claims

1. A parallel, double-headed, four-cylinder, piston pump characterized by: The system includes a pump head, a first motor, a second motor, a first plunger pump body, a second plunger pump body, a third plunger pump body, a fourth plunger pump body, a first plunger, and a second plunger. The pump head is plate-shaped and contains an outlet channel and an inlet channel. The outlet channel communicates with a first and second inlet hole on the front of the pump head, a third and fourth inlet hole on the back of the pump head, and an outlet on the side of the pump head. The inlet channel communicates with a first and second outlet hole on the front of the pump head, a third and fourth outlet hole on the back of the pump head, and an inlet on the side of the pump head. The first plunger pump body is equipped with... The pump comprises three pump bodies: a first pump chamber and a first outlet check valve, a first inlet check valve, and a first plunger orifice connected to the first pump chamber; a second plunger pump body and a second pump chamber and a second outlet check valve, a second inlet check valve, and a second plunger orifice connected to the second pump chamber; a third plunger pump body and a third pump chamber and a third outlet check valve, a third inlet check valve, and a third plunger orifice connected to the third pump chamber; and a fourth plunger pump body and a fourth pump chamber and a fourth outlet check valve, a fourth inlet check valve, and a fourth plunger orifice connected to the fourth pump chamber; a first plunger orifice seat is threaded onto the first plunger orifice, and a first plunger orifice seat has a through-hole first... The first plunger has a plunger bore, a second plunger bore seat threadedly fitted to the second plunger bore cavity, and a through second plunger bore on the second plunger bore seat. The third plunger bore has a plunger bore seat threadedly fitted to the third plunger bore cavity, and a through third plunger bore on the third plunger bore seat. The fourth plunger bore has a plunger bore seat threadedly fitted to the fourth plunger bore cavity, and a through fourth plunger bore on the fourth plunger bore seat. One end of the first plunger is a first plunger shaft, and the other end is a second plunger shaft, with a first drive notch in the middle. One end of the second plunger is a third plunger shaft, and the other end is a fourth plunger shaft, with a second drive notch in the middle. The output shaft of the first motor is equipped with a first... A second drive eccentric wheel is mounted on the output shaft of the second motor; rubber sealing rings and rubber limiting washers that slide with the shafts of the first, second, third, and fourth plungers are respectively installed in the first, second, third, and fourth plunger holes; the first plunger pump body and the second plunger pump body are symmetrically mounted on the front of the pump head, with the first plunger holes and the second plunger holes arranged coaxially facing each other; the first outlet check valve and the second outlet check valve are respectively connected to the first inlet hole and the second inlet hole on the front of the pump head; the first inlet check valve and the second inlet check valve are respectively connected to the first outlet hole and the second outlet hole on the front of the pump head.The third and fourth plunger pump bodies are symmetrically mounted on the back of the pump head. The third and fourth plunger holes are coaxially arranged facing each other. The third and fourth outlet check valves are respectively connected to the third and fourth inlet holes on the back of the pump head. The third and fourth inlet check valves are respectively connected to the third and fourth outlet holes on the back of the pump head. The first plunger shaft of the first plunger is slidably fitted onto the first plunger hole on the first plunger pump body, and its second plunger shaft is slidably fitted onto the... The second plunger shaft of the second plunger is slidably fitted into the third plunger hole on the third plunger pump body, and the fourth plunger shaft is slidably fitted into the fourth plunger hole on the fourth plunger pump body; the first motor is mounted on the first plunger pump body and the second plunger pump body, and its first drive eccentric wheel is fitted into the first drive notch on the first plunger; the second motor is mounted on the third plunger pump body and the fourth plunger pump body, and its second drive eccentric wheel is fitted into the second drive notch on the second plunger.

2. The parallel double-headed four-cylinder plunger pump according to claim 1, characterized in that: The water outlet of the pump head is located at the upper part of the pump head, and its water inlet is located at the lower part of the pump head. The top side of the water outlet is provided with an upper through hole, and a water pressure gauge, a pressure regulating valve and an air vent valve are connected to the outer opening of the upper through hole on the top side of the pump head.

3. The parallel double-headed four-cylinder plunger pump according to claim 1 or 2, characterized in that: The first and third water inlets on the pump head are coaxially arranged, the second and fourth water inlets are coaxially arranged, the first and third water outlets are coaxially arranged, and the second and fourth water outlets are coaxially arranged.

4. The parallel double-headed four-cylinder plunger pump according to claim 1 or 2, characterized in that: The abutment surfaces of the first and second plunger pump bodies, which are symmetrically installed together, are perpendicular to the first plunger hole of the first plunger pump body and the second plunger hole of the second plunger pump body, respectively. The abutment surfaces of the third and fourth plunger pump bodies, which are symmetrically installed together, are perpendicular to the third plunger hole of the third plunger pump body and the fourth plunger hole of the fourth plunger pump body, respectively.

5. The parallel double-headed four-cylinder plunger pump according to claim 1 or 2, characterized in that: The first, second, third, and fourth plunger seats adopt the same structure, which is a cylindrical shell with an external thread on the front of its outer side, an external sealing ring on the outer side behind the external thread, a plunger hole through the center along the central axis, and a mounting and disassembly drive hole on its front end face.

6. The parallel double-headed four-cylinder plunger pump according to claim 5, characterized in that: Two rubber sealing rings and two rubber limiting washers are installed in the plunger hole. Their arrangement from front to back is: first rubber limiting washer, first rubber sealing ring, second rubber limiting washer, and second rubber sealing ring. The first rubber limiting washer, first rubber sealing ring, second rubber limiting washer, and second rubber sealing ring are arranged to abut against each other.

7. The parallel double-headed four-cylinder plunger pump according to claim 1 or 2, characterized in that: The pump head has water inlets on both the left and right sides, with one inlet open and the other closed; the pump head also has water outlets on both the left and right sides, with one outlet open and the other closed.

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