A reciprocating high-pressure plunger pump

Abstract

The present invention provides a reciprocating high-pressure plunger pump, which relates to the technical field of high-pressure pumps, and comprises a plunger pump body, wherein the plunger pump body comprises a pump body, a driving mechanism, a piston assembly and a transmission mechanism, a rear end bracket is welded to one end of the pump body, a first support plate is integrally formed at the bottom of the rear end bracket, a motor is screwed to one end of the driving mechanism, and the top of the motor housing and the bottom of the first support plate are welded as a whole, a piston assembly is inserted into the interior of the pump body, and a transmission mechanism is embedded in the interior of the piston assembly, the reciprocating high-pressure plunger pump extends the stroke length of the piston assembly and reduces the length occupied by the entire pump body, the transmission mechanism part can only replace the rotating sleeve at the bottom, and the replacement process of the wear parts is simple and efficient, and can effectively prevent the transmission mechanism from being broken due to excessive resistance when the discharge pipeline is blocked, thereby improving the safety during the pumping process.

Description

Technical Field

[0001] The present invention relates to the technical field of high-pressure pumps, in particular to a reciprocating high-pressure plunger pump. Background Art

[0002] The plunger pump is an important device in the hydraulic system. It relies on the reciprocating motion of the plunger in the cylinder to change the volume of the sealed working chamber, thereby achieving oil suction and oil pressure. It has a compact design and occupies a small space. It has high working efficiency and can effectively convert power into hydraulic energy. Therefore, it is widely used in high-pressure, large-flow and flow-regulation-required occasions, such as hydraulic presses, engineering machinery and ships.

[0003] The reciprocating high-pressure plunger pump in the prior art is driven by a motor, and the piston rod is driven to reciprocate by means of a connecting rod structure. Therefore, this structure causes the connecting rod structure to occupy a large amount of space, so the volume of the entire device is large, especially the piston cylinder with a longer stroke will further increase the overall length. On the other hand, when the conventional motor is driven, when the water outlet part is blocked, the pressure inside the piston cylinder will increase during the drainage process, and there will be a risk of the transmission rod breaking. This risk will increase with the increase of usage time. At the same time, when the transmission part of the conventional reciprocating high-pressure plunger pump is worn, the entire transmission structure needs to be replaced, resulting in high subsequent maintenance costs. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a reciprocating high-pressure plunger pump to solve the problems raised in the above-mentioned background technology. The present invention extends the stroke length of the piston assembly and reduces the length of the entire pump body. The replacement process of worn parts is simple and efficient, and can effectively prevent the transmission mechanism from breaking due to excessive resistance when the discharge pipeline is blocked, thereby improving the safety of the pumping process.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a reciprocating high-pressure plunger pump, including a plunger pump body, the plunger pump body including a pump body, a driving mechanism, a piston assembly and a transmission mechanism, a rear end bracket is welded to one end of the pump body, and the bottom of the rear end bracket is integrally formed with a first support plate, one end of the driving mechanism is screwed with a motor, and the top of the motor housing and the bottom of the first support plate are welded as a whole, a piston assembly is inserted into the interior of the pump body, a transmission mechanism is embedded in the interior of the piston assembly, a top block is integrally formed on the top of the transmission mechanism, a rotating sleeve is sleeved on the bottom of the transmission mechanism, the rotating sleeve is embedded in the surface of the driving mechanism as a whole, the top block is an overall rectangular structure, and the top blocks are integrally embedded in the interior of the piston assembly, a locking screw is inserted into the bottom of the rotating sleeve, and a limiting convex ring is integrally formed on the surface of the locking screw.

[0006] Furthermore, the pump body includes a piston cylinder, an intake pipe and a discharge pipe. The rear end of the piston cylinder is integrally formed with a rear baffle, a guide hole is opened in the middle of the rear baffle, and the bottom of the piston cylinder is integrally formed with a second support plate, and a docking bearing is embedded in the middle of the second support plate.

[0007] Furthermore, the suction pipe and the discharge pipe are both formed integrally with the piston cylinder, and one-way valves are installed on the suction pipe and the discharge pipe, and the front end of the piston cylinder is in a closed state.

[0008] Furthermore, the driving mechanism includes a motor and a driving sleeve, a driving shaft is inserted into the output end of the motor, a flat key is embedded in the surface of the driving shaft, an arc groove is opened on the surface of the driving sleeve, the arc groove is inclined as a whole, and a through hole is opened at one end of the arc groove.

[0009] Furthermore, a keyway is provided inside the drive sleeve, the end of the drive shaft is embedded in the interior of the docking bearing, the top and bottom of the through hole are both open, and the diameter of the through hole is the same as the inner wall width of the arc groove.

[0010] Furthermore, the piston assembly includes a push plate and a piston column. The push plate is integrally formed on the surface of the piston column. A slide groove is opened inside the push plate. An arc column is embedded on the inner wall of the slide groove. A spring is welded to the rear end of the arc column.

[0011] Furthermore, the other end of the spring is welded to the inside of the slide groove, the number of the arc columns and springs is eight, the piston column is integrally embedded in the interior of the piston cylinder, and the side of the piston column is in contact with the inner wall of the piston cylinder, and the push plate penetrates into the interior of the piston cylinder from the inside of the guide hole.

[0012] Furthermore, the transmission mechanism includes a top block and a transmission rod, the top block is welded to the top of the transmission rod, a first clamping plate is integrally formed above the surface of the transmission rod, and a second clamping plate is integrally formed below the surface of the transmission rod.

[0013] Furthermore, a center column is integrally formed at the bottom end of the transmission rod, a ball is embedded in the inner wall of the rotating sleeve, and the rotating sleeve is sleeved on the surface of the center column.

[0014] Furthermore, a threaded hole is provided at the bottom of the center column, and the locking screw passes upward from the bottom of the rotating sleeve and is embedded in the threaded hole at the bottom of the center column. The locking screw supports the bottom end of the rotating sleeve through a limiting convex ring on the surface, and the diameter of the rotating sleeve is the same as the diameter of the through hole.

[0015] Beneficial effects of the present invention:

[0016] 1. The reciprocating high-pressure plunger pump pushes the transmission mechanism through the arc groove on the driving mechanism, and then controls the movement of the piston assembly through the transmission mechanism to achieve the purpose of pumping the liquid. It does not need to use a connecting rod structure, which can effectively extend the length of the piston assembly, and the driving mechanism at the bottom will not occupy additional length space, thereby reducing the length occupation range of the entire pump.

[0017] 2. The reciprocating high-pressure plunger pump transmits the power provided by the driving mechanism to the piston assembly through the transmission mechanism. When the rotating sleeve at the bottom of the transmission mechanism is worn out after long-term use and needs to be replaced, it is only necessary to control the transmission mechanism to move to the through-hole position at the end of the arc groove through the driving mechanism, and the rotating sleeve can be directly disassembled and replaced from the bottom of the through-hole. Therefore, the entire disassembly process does not require the removal of other structures, which simplifies the replacement efficiency of core wear components.

[0018] 3. The reciprocating high-pressure plunger pump is embedded into the push plate through a top block at the top of the transmission mechanism, and realizes the process of limited transmission through multiple sets of arc columns and spring structures. At the same time, through this structure, when the plunger pump is used for a long time and the discharge pipeline is blocked, the transmission process pressure of the transmission mechanism increases to the set limit, and the limiting effect of the arc column can be automatically released, thereby avoiding the phenomenon of transmission mechanism breakage caused by excessive pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the appearance of a reciprocating high-pressure plunger pump of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the pump body part of the present invention;

[0021] Figure 3 This is a disassembled diagram of the driving mechanism of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the piston assembly part of the present invention;

[0023] Figure 5 This is a disassembled diagram of the transmission mechanism of the present invention;

[0024] Figure 6 is an end cross-sectional view of the piston assembly of the present invention;

[0025] Figure 7 for Figure 6 A magnified image of area A;

[0026] In the figure: 1. pump body; 2. driving mechanism; 3. piston assembly; 4. transmission mechanism; 5. piston cylinder; 6. suction pipe; 7. discharge pipe; 8. one-way valve; 9. rear end bracket; 10. first support plate; 11. second support plate; 12. docking bearing; 13. rear baffle; 14. guide hole; 15. motor; 16. driving shaft; 17. flat key; 18. driving sleeve; 19. arc groove; 20. through hole; 21. keyway; 22. push plate; 23. piston column; 24. slide groove; 25. top block; 26. transmission rod; 27. first clamping plate; 28. second clamping plate; 29. ​​center column; 30. rotating sleeve; 31. ball; 32. locking screw; 33. limiting convex ring; 34. spring; 35. arc column. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] See also Figures 1 to 7 The present invention provides the following technical solutions: A reciprocating high-pressure plunger pump comprises a plunger pump body, the plunger pump body comprises a pump body 1, a driving mechanism 2, a piston assembly 3 and a transmission mechanism 4, a rear end bracket 9 is welded at one end of the pump body 1, a first support plate 10 is formed integrally at the bottom of the rear end bracket 9, a motor 15 is screwed at one end of the driving mechanism 2, and the top of the shell of the motor 15 is welded to the bottom of the first support plate 10 as a whole, a piston assembly 3 is inserted into the pump body 1, a transmission mechanism 4 is embedded in the piston assembly 3, a top block 25 is formed integrally at the top of the transmission mechanism 4, a rotating sleeve 30 is sleeved at the bottom of the transmission mechanism 4, the rotating sleeve 30 is integrally embedded in the surface of the driving mechanism 2, the top block 25 is an overall rectangular structure, and the top blocks 25 are integrally embedded in the interior of the piston assembly 3, a locking screw 32 is inserted at the bottom of the rotating sleeve 30, and a limiting convex ring 33 is integrally formed on the surface of the locking screw 32. The reciprocating high-pressure plunger pump is operated by a driving mechanism 2 , and cooperates with a transmission mechanism 4 to drive a piston assembly 3 to reciprocate, thereby being able to draw liquid connected to a suction pipe 6 into a pump body 1 , and then discharge the liquid through a discharge pipe 7 .

[0029] When the present invention is used, the suction pipe 6 is connected to the water source through an external pipe, and the discharge pipe 7 is connected to the discharge area through a pipe. At this time, the driving mechanism 2 can be started, and the transmission mechanism 4 and the piston assembly 3 are driven to perform translational movement through the operation of the driving mechanism 2. After the piston assembly 3 moves inside the piston cylinder 5 through the piston column 23 at the end, the external water source can be drawn in. This process is completed by driving and guiding the rotating sleeve 30 at the bottom of the transmission mechanism 4 through the arc groove 19 on the driving mechanism 2. When the liquid is drawn in, the motor 15 part still rotates unidirectionally, and the rotating sleeve 30 can be pushed toward the initial position again through the arc groove 19, so that the piston assembly 3 can be pushed into the interior of the piston cylinder 5 again, and the drawn liquid can be discharged.

[0030] In this embodiment, the pump body 1 includes a piston cylinder 5, an intake pipe 6 and a discharge pipe 7. The rear end of the piston cylinder 5 is integrally formed with a rear baffle 13, and a guide hole 14 is opened in the middle of the rear baffle 13. The bottom of the piston cylinder 5 is integrally formed with a second support plate 11, and a docking bearing 12 is embedded in the middle of the second support plate 11. The intake pipe 6 and the discharge pipe 7 are both integrally formed with the piston cylinder 5, and a one-way valve 8 is installed on the intake pipe 6 and the discharge pipe 7. The front end of the piston cylinder 5 is in a closed state.

[0031] Specifically, one-way valves 8 are installed on the surfaces of the suction pipe 6 and the discharge pipe 7. Therefore, when the piston assembly 3 is driven by the driving mechanism 2 to reciprocate inside the piston cylinder 5, when the piston column 23 moves toward the end away from the pipe, the external water source can flow into the interior of the piston cylinder 5 through the suction pipe 6 and the one-way valve 8 on its surface. When the piston column 23 moves toward one end of the pipe, the water source inside the piston cylinder 5 can be discharged through the discharge pipe 7 and the one-way valve 8 on its surface.

[0032] In this embodiment, the driving mechanism 2 includes a motor 15 and a driving sleeve 18. The output end of the motor 15 is inserted with a driving shaft 16. The surface of the driving shaft 16 is embedded with a flat key 17. The surface of the driving sleeve 18 is provided with an arc groove 19. The arc groove 19 is tilted as a whole, and a through hole 20 is provided at one end of the arc groove 19. A key groove 21 is provided inside the driving sleeve 18. The end of the driving shaft 16 is embedded in the inside of the docking bearing 12. The top and bottom of the through hole 20 are both open, and the diameter of the through hole 20 is the same as the inner wall width of the arc groove 19. The transmission mechanism 4 is pushed through the arc groove 19 on the driving mechanism 2, and then the piston assembly 3 is controlled to move through the transmission mechanism 4 to achieve the purpose of pumping the liquid. There is no need to use a connecting rod structure, which can effectively extend the length of the piston assembly 3, and the driving mechanism 2 at the bottom will not occupy additional length space, thereby reducing the length occupation range of the entire pump.

[0033] Specifically, after starting the motor 15, the motor 15 drives the driving shaft 16 to rotate, and the driving shaft 16 drives the driving sleeve 18 to rotate through the flat key 17 on the surface. The surface of the driving sleeve 18 rotates through the arc groove 19, and the rotating sleeve 30 embedded in the arc groove 19 can be pushed. Since the rotating sleeve 30 is restricted by the top transmission mechanism 4, it can only perform linear motion. Therefore, the entire transmission mechanism 4 and the piston assembly 3 can be controlled by the driving mechanism 2 to perform linear reciprocating motion, and this process does not require the use of a connecting rod structure.

[0034] In this embodiment, the piston assembly 3 includes a push plate 22 and a piston column 23. The push plate 22 is integrally formed on the surface of the piston column 23. A slide groove 24 is provided inside the push plate 22. An arc column 35 is embedded on the inner wall of the slide groove 24. A spring 34 is welded to the rear end of the arc column 35. The other end of the spring 34 is welded inside the slide groove 24. There are eight arc columns 35 and springs 34. The piston column 23 is integrally embedded in the piston cylinder 5, and the side of the piston column 23 is in contact with the inner wall of the piston cylinder 5. The push plate 22 penetrates into the piston cylinder 5 from the inside of the guide hole 14. The top of the transmission mechanism 4 is embedded into the interior of the push plate 22 through the top block 25, and the process of limited transmission is realized through multiple groups of arc columns 35 and springs 34. At the same time, through this structure, when the plunger pump is used for a long time and causes partial blockage of the discharge pipe 7, the transmission process pressure of the transmission mechanism 4 increases to a set limit, and the limiting effect of the arc column 35 can be automatically released, thereby avoiding the phenomenon of the transmission mechanism 4 being broken due to excessive pressure.

[0035] Specifically, both ends of the top block 25 at the top of the transmission mechanism 4 are clamped by the arc columns 35 on the inner wall of the slide groove 24, and both ends of the top block 25 are restricted by the four arc columns 35, and the rear end of the arc column 35 is lifted up by the spring 34 to protrude from the inner wall of the slide groove 24. Therefore, when the transmission mechanism 4 is driven to move by the above-mentioned driving mechanism 2, the top block 25 part will drive the entire piston assembly 3 to move linearly by leaning against the side of the arc column 35, but the piston cylinder When the liquid pressure inside is too high, the pressure against the side of the arc column 35 will increase until the pressure is greater than the thrust of the spring 34 pushing the arc column 35. At this time, the top block 25 can press each arc column 35 into the inner wall of the slide groove 24. At this time, the arc column 35 no longer restricts the top block 25. The subsequent operation of the driving mechanism 2 can only drive the transmission mechanism 4 to move along the slide groove 24, and can no longer control the movement of the piston assembly 3. The entire plunger pump stops pumping the liquid.

[0036] In this embodiment, the transmission mechanism 4 includes a top block 25 and a transmission rod 26. The top block 25 is welded to the top of the transmission rod 26. A first clamping plate 27 is integrally formed above the surface of the transmission rod 26, and a second clamping plate 28 is integrally formed below the surface of the transmission rod 26. A center column 29 is integrally formed at the bottom end of the transmission rod 26. A ball 31 is embedded in the inner wall of the rotating sleeve 30, and the rotating sleeve 30 is sleeved on the surface of the center column 29. A threaded hole is opened at the bottom of the center column 29. The locking screw 32 passes upward from the bottom of the rotating sleeve 30 and is embedded in the threaded hole at the bottom of the center column 29. The locking screw 32 supports the bottom end of the rotating sleeve 30 through a limiting convex ring 33 on the surface. The diameter of the rotating sleeve 30 is the same as the diameter of the through hole 20. The power provided by the driving mechanism 2 is transmitted to the piston assembly 3 through the transmission mechanism 4. When the rotating sleeve 30 at the bottom of the transmission mechanism 4 is worn out after long-term use and needs to be replaced, it is only necessary to control the transmission mechanism 4 to move to the through hole 20 at the end of the arc groove 19 through the driving mechanism 2, and the rotating sleeve 30 can be directly disassembled and replaced from the bottom of the through hole 20. Therefore, the entire disassembly process does not require the removal of other structures, which simplifies the replacement efficiency of core wear components.

[0037] Specifically, the driving sleeve 18 is driven to rotate by the driving mechanism 2 until the transmission mechanism 4 is moved to the end of the arc groove 19 with the through hole 20. At this time, a tool is used to remove the locking screw 32 from the bottom of the through hole 20, so that the supporting effect of the limiting convex ring 33 on the rotating sleeve 30 can be released, and the rotating sleeve 30 will directly disengage from the surface of the center column 29 and fall down and be discharged directly from the inside of the through hole 20 below. Then, the new rotating sleeve 30 is pushed upward from the bottom of the through hole 20 to the surface of the center column 29, and the locking screw 32 is reused to pass through the bottom of the rotating sleeve 30 and lock and dock with the bottom of the center column 29, thereby completing the replacement process of the rotating sleeve 30.

[0038] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A reciprocating high-pressure plunger pump, comprising a plunger pump body, characterized in that: The plunger pump body comprises a pump body (1), a driving mechanism (2), a piston assembly (3) and a transmission mechanism (4); a rear end bracket (9) is welded to one end of the pump body (1); a first support plate (10) is integrally formed at the bottom of the rear end bracket (9); the driving mechanism (2) comprises a motor (15) and a driving sleeve (18); the top of the housing of the motor (15) and the bottom of the first support plate (10) are welded as a whole; a piston assembly (3) is inserted into the interior of the pump body (1); a transmission mechanism (4) is embedded in the interior of the piston assembly (3); the transmission mechanism (4) comprises a transmission rod (26) and a top block (25); a rotating sleeve (30) is sleeved on the bottom of the transmission mechanism (4); the rotating sleeve (30) The top block (25) is integrally embedded in the surface of the driving mechanism (2); the top block (25) is integrally rectangular in structure, and the top block (25) is integrally embedded in the interior of the piston assembly (3); a locking screw (32) is inserted through the bottom of the rotating sleeve (30); a limiting convex ring (33) is integrally formed on the surface of the locking screw (32); the pump body (1) comprises a piston cylinder (5), an intake pipe (6) and a discharge pipe (7); a rear baffle (13) is integrally formed at the rear end of the piston cylinder (5); a guide hole (14) is provided in the middle of the rear baffle (13); a second support plate (11) is integrally formed at the bottom of the piston cylinder (5); a docking bearing (12) is embedded in the middle of the second support plate (11); the motor (1 5) is inserted into the output end thereof, a flat key (17) is embedded on the surface of the drive shaft (16), an arc groove (19) is provided on the surface of the drive sleeve (18), the arc groove (19) is inclined as a whole, and a through hole (20) is provided at one end of the arc groove (19), a key groove (21) is provided inside the drive sleeve (18), the end of the drive shaft (16) is embedded in the inside of the docking bearing (12), the top and bottom of the through hole (20) are both open, and the diameter of the through hole (20) is the same as the inner wall width of the arc groove (19), the piston assembly (3) comprises a push plate (22) and a piston column (23), the push plate (22) is integrally formed on the surface of the piston column (23) The push plate (22) is provided with a slide groove (24) inside, and an arc column (35) is embedded on the inner wall of the slide groove (24). A spring (34) is welded to the rear end of the arc column (35), and the other end of the spring (34) is welded to the inside of the slide groove (24). The number of the arc column (35) and the number of the spring (34) are both eight. The piston column (23) is integrally embedded in the interior of the piston cylinder (5), and the side of the piston column (23) is in contact with the inner wall of the piston cylinder (5). The push plate (22) penetrates into the interior of the piston cylinder (5) from the inside of the guide hole (14). The top block (25) is welded to the top of the transmission rod (26), and a first clamping plate (27) is integrally formed above the surface of the transmission rod (26).A second clamping plate (28) is integrally formed below the surface of the transmission rod (26), a center column (29) is integrally formed at the bottom end of the transmission rod (26), a ball (31) is embedded in the inner wall of the rotating sleeve (30), and the rotating sleeve (30) is sleeved on the surface of the center column (29), a threaded hole is opened at the bottom of the center column (29), the locking screw (32) passes upward from the bottom of the rotating sleeve (30) and is embedded in the threaded hole at the bottom of the center column (29), the locking screw (32) supports the bottom end of the rotating sleeve (30) through a limiting convex ring (33) on the surface, and the diameter of the rotating sleeve (30) is the same as the diameter of the through hole (20).

2. A reciprocating high-pressure plunger pump according to claim 1, characterized in that: The suction pipe (6) and the discharge pipe (7) are both integrally formed with the piston cylinder (5), and a one-way valve (8) is installed on the suction pipe (6) and the discharge pipe (7), and the front end of the piston cylinder (5) is in a closed state.

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