Plunger pump convenient to disassemble and assemble

Abstract

The utility model discloses a plunger pump convenient to disassemble and assemble, which comprises a driving shaft, a connecting block assembly, a plunger rod, a pump cylinder, a pressing end cover, a guide sleeve, a first sealing ring, a second sealing ring and a pump head, one end of the driving shaft is provided with a groove group, the connecting block assembly is arranged on the plunger rod, the pump cylinder is provided with a plunger channel, the plunger channel penetrates through two ends of the pump cylinder, and the pressing end cover is arranged on the pump head. One end of the pressing end cover is installed at one end of the pump cylinder, the guide sleeve is installed in the plunger channel, the guide sleeve and the plunger channel are coaxially arranged, the other end of the plunger rod penetrates through the guide sleeve and the first sealing ring to be installed on the inner wall of the guide sleeve, a connecting cylinder is arranged at one end of the pump head, and the other end of the pump cylinder is installed in a connecting channel. Through the application of the plunger pump convenient to disassemble and assemble, the driving shaft, the plunger rod, the pump cylinder and the pump head can be separated, so that the first sealing ring and the second sealing ring in the pump cylinder can be replaced conveniently, the overhaul difficulty and the maintenance cost are reduced, and the liquid injection precision of the plunger pump is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pumps, in particular to a plunger pump which is easy to disassemble and assemble. Background Art

[0002] A plunger pump is a device that changes the volume of the inner cavity through the reciprocating movement of the plunger to achieve liquid suction or injection. It is widely used in battery production, biological reagent preparation and other occasions that require high-precision metering and injection. In order to ensure the injection accuracy of the plunger pump, it is necessary to regularly inspect and replace the rubber seals inside it. In the current plunger pump products, most of the pump core structures are directly fixed in the pump body, which is difficult to disassemble and inconvenient for maintenance. In addition, the sealing of the pump core structure of the existing plunger pump is poor, which affects the injection accuracy and production efficiency of the plunger pump. Utility Model Content

[0003] In view of this, in order to solve the above problems, the purpose of the utility model is to provide a plunger pump that is easy to disassemble and assemble, comprising:

[0004] A drive shaft, a connecting block assembly, a plunger rod, a pump barrel, a clamping end cover, a guide sleeve, a first sealing ring, a second sealing ring and a pump head, wherein a groove group is provided at one end of the drive shaft, one end of the connecting block assembly can be operably engaged with or disengaged from the groove group, the other end of the connecting block assembly is mounted on one end of the plunger rod, the pump barrel has a plunger channel, the plunger channel is extended along the length direction of the pump barrel, the plunger channel runs through both ends of the pump barrel, one end of the clamping end cover is mounted on one end of the pump barrel, the guide sleeve is mounted in the plunger channel, the guide sleeve is coaxially arranged with the plunger channel, the other end of the plunger rod passes through the clamping end cover and extends into the plunger channel, the other end of the plunger rod passes through the guide sleeve, the first sealing ring is mounted on the inner wall of the guide sleeve, the second sealing ring is arranged between the guide sleeve and the pump barrel, one end of the pump head is provided with a connecting sleeve, the connecting sleeve has a connecting channel, and the other end of the pump barrel is mounted in the connecting channel.

[0005] In another preferred embodiment, the connecting block assembly includes: a connecting block body and two guide blocks, one end of the connecting block body and one end of the two guide blocks can be operably engaged with or disengaged from the groove group, the other end of the connecting block body and the other end of the two guide blocks are installed on one end of the plunger rod, and the two guide blocks are symmetrically arranged about the center of the plunger rod.

[0006] In another preferred embodiment, the cross-section of the connecting block body along the axial direction of the plunger rod is arranged in a "T" shape, and the two guide blocks are arranged in a cylindrical shape.

[0007] In another preferred embodiment, the operation comprises: a fixed groove and two guide grooves, the fixed groove is extended radially along the driving shaft, both inner walls of the fixed groove are provided with a accommodating space, both sides of one end of the connecting block body are operably extended into the two accommodating spaces, the two guide grooves are extended circumferentially along the driving shaft, the two guide grooves are symmetrically arranged about the center of the driving shaft, and each guide block is operably slidably arranged in a corresponding guide.

[0008] In another preferred embodiment, the inner wall of one end of the pump barrel is provided with an internal thread, the outer wall of one end of the clamping end cover is provided with an external thread, the clamping end cover is threadedly connected to the pump barrel, and one end of the clamping end cover is clamped against one end of the guide sleeve.

[0009] In another preferred embodiment, an annular groove is formed on the inner wall of the guide sleeve, and the annular groove is arranged along the circumference of the guide sleeve. The first sealing ring is installed in the annular groove, and the first sealing ring contacts the outer wall of the plunger rod.

[0010] In another preferred embodiment, the plunger channel includes a first channel portion and a second channel portion which are interconnected, the inner diameter of the first channel portion is larger than the inner diameter of the second channel portion, the guide sleeve is installed in the first channel portion, a sealing groove is provided at the other end of the guide sleeve, the sealing groove is arranged along the circumference of the guide sleeve, the second sealing ring is installed in the sealing groove, and the second sealing ring is clamped at the connecting end surface of the first channel portion and the second channel portion.

[0011] In another preferred embodiment, it also includes: an inlet pipe, an inlet one-way valve, a liquid outlet pipe and a liquid outlet one-way valve, the pump head has a liquid storage channel, the liquid storage channel is connected to the connecting channel, the inlet one-way valve is installed in the inlet pipe, one end of the inlet pipe is installed on the outer wall of one side of the pump head, the inlet pipe is connected to the liquid storage channel, the liquid outlet one-way valve is installed in the outlet pipe, one end of the outlet pipe is installed on the outer wall of the other side of the outer wall of the pump head, and the outlet pipe is connected to the liquid storage channel.

[0012] In another preferred embodiment, the flow direction of the liquid inlet one-way valve is opposite to the flow direction of the liquid outlet one-way valve.

[0013] In another preferred embodiment, a limiting ring is provided on the inner wall of the connecting channel, the limiting ring is arranged along the circumference of the connecting channel, and the other end of the pump barrel is clamped on the limiting ring.

[0014] Due to the adoption of the above technical solution, the utility model has the following positive effects compared with the prior art: through the application of the utility model, a plunger pump that is easy to disassemble and assemble is provided, and the drive shaft, the plunger rod, the pump barrel and the pump head can all be separated to facilitate the replacement of the first sealing ring and the second sealing ring in the pump barrel, thereby reducing the difficulty of inspection and maintenance and the maintenance cost, and ensuring the injection accuracy of the plunger pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall schematic diagram of a plunger pump that is easy to disassemble and assemble according to the utility model;

[0016] Figure 2 It is a partial schematic diagram of a plunger pump that is easy to disassemble and assemble according to the utility model;

[0017] Figure 3 The utility model is a bottom view of a driving shaft of a plunger pump which is easy to disassemble and assemble.

[0018] In the accompanying drawings: 1. drive shaft; 2. plunger rod; 3. pump barrel; 4. clamping end cover; 5. guide sleeve; 6. first sealing ring; 7. second sealing ring; 8. pump head; 9. plunger channel; 10. connecting barrel; 11. connecting channel; 12. connecting block body; 13. guide block; 14. fixing groove; 15. guide groove; 16. first channel part; 17. second channel part; 18. liquid inlet pipe; 19. liquid inlet one-way valve; 20. liquid outlet pipe; 21. liquid outlet one-way valve; 22. liquid storage channel; 23 limiting ring. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0020] like Figures 1 to 3 As shown, a plunger pump that is easy to disassemble and assemble in a preferred embodiment is shown, comprising:

[0021] A driving shaft 1, a connecting block assembly, a plunger rod 2, a pump barrel 3, a clamping end cover 4, a guide sleeve 5, a first sealing ring 6, a second sealing ring 7 and a pump head 8. One end of the driving shaft 1 is provided with a groove group, one end of the connecting block assembly can be operably connected or disengaged from the groove group, and the other end of the connecting block assembly is installed at one end of the plunger rod 2. The pump barrel 3 has a plunger channel 9, which extends along the length direction of the pump barrel 3. The plunger channel 9 runs through both ends of the pump barrel 3. One end of the clamping end cover 4 is installed at At one end of the pump barrel 3, a guide sleeve 5 is installed in the plunger channel 9, and the guide sleeve 5 is coaxially arranged with the plunger channel 9. The other end of the plunger rod 2 passes through the clamping end cover 4 and extends into the plunger channel 9. The other end of the plunger rod 2 passes through the guide sleeve 5. The first sealing ring 6 is installed on the inner wall of the guide sleeve 5. The second sealing ring 7 is arranged between the guide sleeve 5 and the pump barrel 3. A connecting cylinder 10 is arranged at one end of the pump head 8. The connecting cylinder 10 has a connecting channel 11. The other end of the pump barrel 3 is installed in the connecting channel 11.

[0022] During actual use, when the first sealing ring 6 or the second sealing ring 7 needs to be replaced, rotate the clamping end cover 4 to disengage the clamping end cover 4 from the pump barrel 3, and then take out the plunger rod 2, the guide sleeve 5, the first sealing ring 6 and the second sealing ring 7 from the plunger channel 9, and replace the first sealing ring 6 or the second sealing ring 7. The drive shaft 1, the plunger rod 2, the pump barrel 3, the clamping end cover 4, the guide sleeve 5, the first sealing ring 6, the second sealing ring 7 and the pump head 8 can all be disassembled and separated to replace different components quickly and conveniently.

[0023] Further, as a preferred embodiment, the connecting block assembly includes: a connecting block body 12 and two guide blocks 13, one end of the connecting block body 12 and one end of the two guide blocks 13 can be operably engaged with or disengaged from the groove group, the other end of the connecting block body 12 and the other end of the two guide blocks 13 are both installed on one end of the plunger rod 2, and the two guide blocks 13 are symmetrically arranged about the center of the plunger rod 2.

[0024] Further, as a preferred embodiment, the cross section of the connecting block body 12 along the axial direction of the plunger rod 2 is arranged in a "T" shape, and the two guide blocks 13 are arranged in a cylindrical shape.

[0025] Further, as a preferred embodiment, operation: a fixed groove 14 and two guide grooves 15, the fixed groove 14 is extended along the radial direction of the drive shaft 1, and the inner walls on both sides of the fixed groove 14 are each provided with a accommodating space, and the two sides of one end of the connecting block body 12 can be operably extended into the two accommodating spaces, the two guide grooves 15 are extended along the circumferential direction of the drive shaft 1, and the two guide grooves 15 are symmetrically arranged about the center of the drive shaft 1, and each guide block 13 can be operably slidably arranged in a corresponding guide. Furthermore, during actual use, when it is necessary to disassemble the drive shaft 1 and the plunger rod 2, the plunger rod 2 is rotated to drive the connecting block body 12 to rotate through the plunger rod 2 to remove the connecting block body 12 from the fixed groove 14. Specifically, when the two sides of one end of the connecting block body 12 are disengaged from the accommodating space of the inner walls on both sides of the fixed groove 14, the plunger rod 2 can be separated from the drive shaft 1. When it is necessary to connect the drive and the plunger rod 2, one end of the connecting block body 12 is extended into the fixed groove 14, and one end of the two guide blocks 13 is extended into the two guide grooves 15. Then, the plunger rod 2 is rotated so that the two sides of one end of the connecting block body 12 are extended into the accommodating space of the inner walls on both sides of the fixed groove 14, thereby completing the connection between the plunger rod 2 and the drive shaft 1.

[0026] Further, as a preferred embodiment, the inner wall of one end of the pump barrel 3 is provided with an internal thread, the outer wall of one end of the compression end cover 4 is provided with an external thread, the compression end cover 4 is threadedly connected to the pump barrel 3, and one end of the compression end cover 4 is clamped against one end of the guide sleeve 5. Further, the compression end cover 4 is threadedly connected to the pump barrel 3, and the disassembly and installation are convenient and fast, saving time and effort.

[0027] Further, as a preferred embodiment, an annular groove is provided on the inner wall of the guide sleeve 5, and the annular groove is arranged along the circumference of the guide sleeve 5. The first sealing ring 6 is installed in the annular groove, and the first sealing ring 6 contacts the outer wall of the plunger rod 2. Further, the first sealing ring 6 is installed in the annular groove to prevent the first sealing ring 6 from shaking when the plunger rod 2 moves, thereby improving the sealing performance.

[0028] Further, as a preferred embodiment, the plunger channel 9 includes a first channel portion 16 and a second channel portion 17 that are interconnected, the inner diameter of the first channel portion 16 is larger than the inner diameter of the second channel portion 17, the guide sleeve 5 is installed in the first channel portion 16, the other end of the guide sleeve 5 is provided with a sealing groove, the sealing groove is arranged along the circumference of the guide sleeve 5, the second sealing ring 7 is installed in the sealing groove, and the second sealing ring 7 is clamped at the connecting end surface of the first channel portion 16 and the second channel portion 17. Further, the other end of the guide sleeve 5 is provided with a sealing groove, the second sealing ring 7 is squeezed in the sealing groove and expanded, so as to improve the sealing performance of the plunger pump and ensure the injection accuracy.

[0029] Further, as a preferred embodiment, it also includes: an inlet pipe 18, an inlet check valve 19, a liquid outlet pipe 20 and a liquid outlet check valve 21. The pump head 8 has a liquid storage channel 22, and the liquid storage channel 22 is connected to the connecting channel 11. The inlet check valve 19 is installed in the inlet pipe 18, and one end of the inlet pipe 18 is installed on the outer wall of one side of the pump head 8. The inlet pipe 18 is connected to the liquid storage channel 22. The liquid outlet check valve 21 is installed in the outlet pipe 20, and one end of the outlet pipe 20 is installed on the outer wall of the other side of the outer wall of the pump head 8. The outlet pipe 20 is connected to the liquid storage channel 22.

[0030] Further, as a preferred embodiment, the flow direction of the inlet check valve 19 is opposite to the flow direction of the outlet check valve 21. Further, the flow direction of the inlet check valve 19 is opposite to the flow direction of the outlet check valve 21, so as to ensure that when the plunger pump is inlet, the inlet check valve 19 is opened, and when the plunger pump is outlet, the outlet check valve 21 is opened to prevent the liquid from flowing back.

[0031] Further, as a preferred embodiment, a stop ring 23 is provided on the inner wall of the connecting channel 11, and the stop ring 23 is provided along the circumference of the connecting channel 11, and the other end of the pump barrel 3 is clamped on the stop ring 23. Further, by providing the stop ring 23, the other end of the pump barrel 3 is prevented from extending into the connecting channel 11.

[0032] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A plunger pump that is easy to disassemble and assemble, characterized in that: include: A drive shaft, a connecting block assembly, a plunger rod, a pump barrel, a clamping end cover, a guide sleeve, a first sealing ring, a second sealing ring and a pump head, wherein a groove group is provided at one end of the drive shaft, one end of the connecting block assembly can be operably engaged with or disengaged from the groove group, the other end of the connecting block assembly is mounted on one end of the plunger rod, the pump barrel has a plunger channel, the plunger channel is extended along the length direction of the pump barrel, the plunger channel runs through both ends of the pump barrel, one end of the clamping end cover is mounted on one end of the pump barrel, the guide sleeve is mounted in the plunger channel, the guide sleeve is coaxially arranged with the plunger channel, the other end of the plunger rod passes through the clamping end cover and extends into the plunger channel, the other end of the plunger rod passes through the guide sleeve, the first sealing ring is mounted on the inner wall of the guide sleeve, the second sealing ring is arranged between the guide sleeve and the pump barrel, one end of the pump head is provided with a connecting sleeve, the connecting sleeve has a connecting channel, and the other end of the pump barrel is mounted in the connecting channel.

2. The easily disassembled plunger pump according to claim 1, characterized in that: The connecting block assembly includes: a connecting block body and two guide blocks, one end of the connecting block body and one end of the two guide blocks can be operably engaged with or disengaged from the groove group, the other end of the connecting block body and the other end of the two guide blocks are installed on one end of the plunger rod, and the two guide blocks are symmetrically arranged about the center of the plunger rod.

3. The easily disassembled plunger pump according to claim 2, characterized in that: The cross section of the connecting block body along the axial direction of the plunger rod is arranged in a "T" shape, and the two guide blocks are arranged in a cylindrical shape.

4. The easily disassembled plunger pump according to claim 2, characterized in that: The operation includes: a fixed groove and two guide grooves, wherein the fixed groove is extended radially along the driving shaft, and an accommodating space is provided on both inner walls of the fixed groove. Both sides of one end of the connecting block body can be operably extended into the two accommodating spaces, and the two guide grooves are extended circumferentially along the driving shaft. The two guide grooves are symmetrically arranged about the center of the driving shaft, and each guide block can be operably slidably arranged in a corresponding guide.

5. The easily disassembled plunger pump according to claim 1, characterized in that: The inner wall of one end of the pump barrel is provided with an internal thread, the outer wall of one end of the clamping end cover is provided with an external thread, the clamping end cover is threadedly connected to the pump barrel, and one end of the clamping end cover is clamped against one end of the guide sleeve.

6. The easily disassembled plunger pump according to claim 1, characterized in that: An annular groove is formed on the inner wall of the guide sleeve and is arranged along the circumference of the guide sleeve. The first sealing ring is installed in the annular groove and contacts the outer wall of the plunger rod.

7. The easily disassembled plunger pump according to claim 1, characterized in that: The plunger channel includes a first channel portion and a second channel portion which are interconnected, the inner diameter of the first channel portion is larger than the inner diameter of the second channel portion, the guide sleeve is installed in the first channel portion, a sealing groove is provided at the other end of the guide sleeve, the sealing groove is arranged along the circumference of the guide sleeve, the second sealing ring is installed in the sealing groove, and the second sealing ring is clamped at the connecting end surface of the first channel portion and the second channel portion.

8. The easily disassembled plunger pump according to claim 1, characterized in that: Also includes: An inlet pipe, an inlet one-way valve, an outlet pipe and an outlet one-way valve, the pump head having a liquid storage channel, the liquid storage channel being communicated with the connecting channel, the inlet one-way valve being installed in the inlet pipe, one end of the inlet pipe being installed on the outer wall on one side of the pump head, the inlet pipe being communicated with the liquid storage channel, the outlet one-way valve being installed in the outlet pipe, one end of the outlet pipe being installed on the outer wall on the other side of the outer wall of the pump head, the outlet pipe being communicated with the liquid storage channel.

9. The easily disassembled plunger pump according to claim 8, characterized in that: The flow direction of the liquid inlet one-way valve is opposite to the flow direction of the liquid outlet one-way valve.

10. The easily disassembled plunger pump according to claim 1, characterized in that: The inner wall of the connecting channel is provided with a limiting ring, the limiting ring is arranged along the circumference of the connecting channel, and the other end of the pump barrel is clamped on the limiting ring.

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