Plunger pump

Abstract

The utility model relates to the technical field of plunger pumps, and discloses a plunger pump which comprises an equipment box, a motor and a fixing cylinder are fixedly connected to the outer wall of the equipment box, a sliding cover is slidably connected to the top of the equipment box, an eccentric wheel is fixedly installed on a power output shaft of the motor, and a fixing column is slidably connected to the inner wall of the eccentric wheel. The outer wall of the fixing column is rotationally connected with one end of a connecting rod, the other end of the connecting rod is rotationally connected with a piston head, and a water storage chamber is fixedly installed on the side, away from the equipment box, of the fixing cylinder. A sliding cover is moved away from the top of an equipment box, the upper portion of the equipment box is opened, at the moment, an eccentric wheel is rotated, a fixing column reaches the highest position, a pulling column is pulled, the pulling column drives the fixing column to move towards the interior of a spring, an extension ring outside the pulling column compresses the spring through movement of the pulling column, and when the fixing column is separated from a connecting rod, the connecting rod is pulled, and the spring is fixed. And the connecting rod drives the piston head to move towards the equipment box, so that the piston head is taken out.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pumps, in particular to a 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 to achieve oil suction and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment.

[0003] After long-term use, the existing plunger pump will cause the outer part of the piston to wear due to the long-term reciprocating motion of the piston inside it, making it extremely troublesome to remove the piston. At the same time, the sealing ring needs to be replaced regularly. However, the sealing ring is inside the equipment, which makes it very troublesome to replace the sealing ring. Summary of the invention

[0004] In view of the deficiencies in the prior art, the utility model provides a plunger pump, which has the advantages of being easy to maintain and convenient to replace the sealing ring, and solves the problems raised by the above-mentioned background technology.

[0005] The utility model provides the following technical scheme: a plunger pump comprises an equipment box, the outer walls of the equipment box are respectively fixedly connected with a motor and a fixed cylinder, the top of the equipment box is slidably connected with a sliding cover, the power output shaft of the motor is fixedly installed with an eccentric wheel, the inner wall of the eccentric wheel is slidably connected with a fixing column, the outer wall of the fixing column is rotatably connected with one end of a connecting rod, and the other end of the connecting rod is rotatably connected with a piston head, the fixing cylinder is fixedly installed with a water storage chamber on a side away from the equipment box, the inner wall of the water storage chamber is provided with a spring 1, the top of the spring 1 is overlapped with a water blocking ball, the outer wall of the fixing cylinder is movably connected with a fixing disc, the inner wall of the fixing cylinder is movably connected with a sealing ring, the outer wall of the fixing cylinder is fixedly installed with an extension ear 2, the outer wall of the fixing disc is fixedly installed with an extension ear 1, the top of the extension ear 2 is fixedly installed with a threaded column, the outer wall of the threaded column is threadedly connected with a bolt, the side of the eccentric wheel away from the fixing column is fixedly installed with a fixing shell, the inner wall of the fixing shell is slidably connected with a pulling column, and the inner wall of the fixing shell is fixedly provided with a spring 2.

[0006] As a preferred technical solution of the utility model, the inner wall of the sealing ring has the same diameter as the outer wall of the piston head, and the piston head is located inside the sealing ring.

[0007] As a preferred technical solution of the utility model, a protruding block is provided on the top of the sealing ring, a square groove is provided on the top of the fixed disc, and the size of the square groove is matched with the protruding block on the top of the sealing ring.

[0008] As a preferred technical solution of the utility model, the extension ear 1 is the same size as the extension ear 2, and a circular groove is provided on the top of the extension ear 1, and the circular groove passes through the extension ear 1.

[0009] As a preferred technical solution of the utility model, one end of the pulling column close to the fixing column is connected to the fixing column, and the pulling column and the fixing column are fixedly assembled.

[0010] As a preferred technical solution of the utility model, the pulling column is provided with an extension ring at one end close to the fixed column, and the extension ring is overlapped with one end of the spring 2 close to the fixed column.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The plunger pump opens the top of the equipment box by removing the sliding cover from the top of the equipment box. At this time, the eccentric wheel is rotated to move the fixed column to the highest point, and the pulling column is pulled. The pulling column drives the fixed column to move toward the inside of the spring. Through the movement of the pulling column, the extension ring outside the pulling column compresses the spring. When the fixed column is separated from the connecting rod, the connecting rod is pulled, so that the connecting rod drives the piston head to move toward the direction of the equipment box, thereby taking out the piston head.

[0013] 2. The plunger pump moves the bolt on the outer wall of the threaded column by rotating the bolt, and removes the bolt from the outer wall of the threaded column. At this time, the pressure of the bolt disappears, so the pressure above the extension ear disappears, and the fixed disc can be taken out. After the fixed disc is taken out, the sealing ring leaks out. At this time, the sealing ring is taken out from the inner wall of the fixed cylinder, and a new sealing ring is taken out and placed in the inner wall of the fixed disc. At this time, the fixed disc is placed above the sealing ring, and the bolt is tightened so that the fixed disc exerts pressure on the sealing ring. At this time, the sealing ring is stuck into the inner wall of the fixed cylinder by the downward pressure of the fixed disc, and the replacement of the sealing ring is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the equipment box of the utility model;

[0017] Figure 4 This is a schematic diagram of the cross-sectional structure of the fixed cylinder of the utility model;

[0018] Figure 5 For this utility model Figure 3 Enlarged structural diagram at A in the middle.

[0019] In the figure: 1. Equipment box; 2. Motor; 3. Fixed cylinder; 4. Water storage chamber; 5. Spring 1; 6. Water blocking ball; 7. Sliding cover; 8. Eccentric wheel; 9. Fixed column; 10. Connecting rod; 11. Piston head; 12. Sealing ring; 13. Fixed disc; 14. Extension ear 1; 15. Extension ear 2; 16. Threaded column; 17. Bolt; 18. Fixed shell; 19. Spring 2; 20. Pull column. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5 A plunger pump comprises an equipment box 1, the outer wall of the equipment box 1 is respectively fixedly connected with a motor 2 and a fixed cylinder 3, a sliding cover 7 is slidably connected with the top of the equipment box 1, an eccentric wheel 8 is fixedly installed on the power output shaft of the motor 2, a fixed column 9 is slidably connected with the inner wall of the eccentric wheel 8, the outer wall of the fixed column 9 is rotatably connected with one end of a connecting rod 10, and the other end of the connecting rod 10 is rotatably connected with a piston head 11, a water storage chamber 4 is fixedly installed on the side of the fixed cylinder 3 away from the equipment box 1, a spring 5 is provided on the inner wall of the water storage chamber 4, a water blocking ball 6 is overlapped on the top of the spring 5, a fixed disc 13 is movably connected to the outer wall of the fixed cylinder 3, and a sealing ring 1 is movably connected to the inner wall of the fixed cylinder 3 2. An extension ear 2 15 is fixedly installed on the outer wall of the fixed cylinder 3, an extension ear 14 is fixedly installed on the outer wall of the fixed disc 13, a threaded column 16 is fixedly installed on the top of the extension ear 2 15, and a bolt 17 is threadedly connected to the outer wall of the threaded column 16. A fixed shell 18 is fixedly installed on the side of the eccentric wheel 8 away from the fixed column 9, a pulling column 20 is slidably connected to the inner wall of the fixed shell 18, and a spring 2 19 is fixedly provided on the inner wall of the fixed shell 18. In the above structure, the number of springs 1 5 and water-blocking balls 6 is two, and the two springs 1 5 and water-blocking balls 6 are arranged up and down at the upper and lower ends of the water storage chamber 4, so that the top water inlet and the bottom water inlet of the water ball 6 are prevented from forming a seal.

[0022] In a preferred embodiment, the inner wall of the sealing ring 12 has the same diameter as the outer wall of the piston head 11, and the piston head 11 is located inside the sealing ring 12. In the above structure, the inner wall of the sealing ring 12 fits with the outer wall of the piston head 11, so that when the piston head 11 reciprocates, the sealing ring 12 isolates the space on both sides of the piston head 11, so that the liquid will not pass through the sealing ring 12.

[0023] In a preferred embodiment, a protruding block is provided on the top of the sealing ring 12, and a square groove is opened on the top of the fixed disc 13, and the size of the square groove is adapted to the protruding block on the top of the sealing ring 12. In the above structure, the sealing ring 12 is limited by the fixed disc 13 by the protruding block of the sealing ring 12 being located in the square groove on the top of the fixed disc 13, so that the sealing ring 12 will not rotate inside the fixed cylinder 3.

[0024] In a preferred embodiment, the extension ear 14 is the same size as the extension ear 2 15, and a circular groove is provided at the top of the extension ear 14, which passes through the extension ear 14. In the above structure, the circular groove at the top of the extension ear 14 is placed on the outer wall of the threaded column 16, and the extension ear 14 is moved downward, so that the threaded column 16 passes through the circular groove at the top of the extension ear 14 and reaches above the extension ear 14.

[0025] In a preferred embodiment, one end of the pulling column 20 close to the fixed column 9 is connected to the fixed column 9, and the pulling column 20 is fixedly assembled with the fixed column 9. In the above structure, by pulling the pulling column 20, the pulling column 20 can drive the fixed column 9 to move toward the inside of the fixed shell 18.

[0026] In a preferred embodiment, the pulling column 20 is provided with an extension ring at one end close to the fixed column 9, and the extension ring overlaps with the end of the spring 2 19 close to the fixed column 9. In the above structure, by pulling the pulling column 20, the pulling column 20 drives the extension ring outside it to move, and the extension ring outside the pulling column 20 moves toward the inside of the fixed shell 18, so that the spring 2 19 is compressed by the extension ring outside the pulling column 20.

[0027] Working principle: when the equipment is needed, the top of the water storage chamber 4 is connected to the water source, and the motor 2 is started. The motor 2 drives the eccentric wheel 8 to rotate, and the eccentric wheel 8 drives the fixed column 9 to rotate. The fixed column 9 drives one end of the connecting rod 10 to rotate with the fixed column 9, and the other end of the connecting rod 10 pulls the piston head 11 in the direction of the fixed column 9. The internal air pressure changes through the pullback of the piston head 11, and the water-blocking ball 6 located above is sucked downward. At this time, the spring 5 located above contracts, so that the top of the water storage chamber 4 is unblocked, and the liquid passes through the top of the water storage chamber 4 and enters the inner cavity of the water storage chamber 4. At this time, the eccentric wheel 8 rotates one circle and returns to the origin, so that the piston head 11 returns to the origin. The air pressure of the piston head 11 lifts the water-blocking ball 6 located below and discharges the water. When the piston head 11 needs to be inspected, the sliding cover 7 is removed from the top of the equipment box 1. , rotate the eccentric wheel 8 so that the fixing column 9 above the eccentric wheel 8 reaches the highest point. At this time, pull the pulling column 20, and the pulling column 20 drives the fixing column 9 to move toward the inside of the fixing shell 18, and at the same time contracts the spring 19. At this time, the fixing column 9 is disengaged from the connecting rod 10, and the connecting rod 10 is pulled, and the connecting rod 10 drives the piston head 11, so that the piston head 11 is taken out. When the sealing ring 12 needs to be replaced, the bolt 17 is turned to disengage the bolt 17 from the threaded column 16. At this time, pull the fixing disc 13 upward to disengage the fixing disc 13 from the sealing ring 12. At this time, take out the sealing ring 12, take out the new sealing ring 12, put the sealing ring 12 into the inner wall of the fixing cylinder 3, align the square groove above the fixing disc 13 with the protruding block on the top of the sealing ring 12, install the fixing disc 13 to the top of the sealing ring 12, install the bolt 17, and complete the replacement.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plunger pump, comprising an equipment box (1), characterized in that: The outer walls of the equipment box (1) are respectively fixedly connected to the motor (2) and the fixed cylinder (3); the top of the equipment box (1) is slidably connected to a sliding cover (7); the power output shaft of the motor (2) is fixedly mounted with an eccentric wheel (8); the inner wall of the eccentric wheel (8) is slidably connected to a fixed column (9); the outer wall of the fixed column (9) is rotatably connected to one end of a connecting rod (10); the other end of the connecting rod (10) is rotatably connected to a piston head (11); a water storage chamber (4) is fixedly mounted on a side of the fixed cylinder (3) away from the equipment box (1); a spring (5) is provided on the inner wall of the water storage chamber (4); a water blocking ball (6) is overlapped on the top of the spring (5); The outer wall of the cylinder (3) is movably connected to a fixed disc (13), the inner wall of the fixed cylinder (3) is movably connected to a sealing ring (12), the outer wall of the fixed cylinder (3) is fixedly installed with a second extension ear (15), the outer wall of the fixed disc (13) is fixedly installed with a first extension ear (14), the top of the second extension ear (15) is fixedly installed with a threaded column (16), the outer wall of the threaded column (16) is threadedly connected with a bolt (17), a fixed shell (18) is fixedly installed on the side of the eccentric wheel (8) away from the fixed column (9), the inner wall of the fixed shell (18) is slidably connected with a pulling column (20), and the inner wall of the fixed shell (18) is fixedly provided with a second spring (19).

2. A plunger pump according to claim 1, characterized in that: The inner wall of the sealing ring (12) has the same diameter as the outer wall of the piston head (11), and the piston head (11) is located inside the sealing ring (12).

3. A plunger pump according to claim 1, characterized in that: A protruding block is provided on the top of the sealing ring (12), and a square groove is provided on the top of the fixed disc (13), wherein the size of the square groove matches the protruding block on the top of the sealing ring (12).

4. A plunger pump according to claim 1, characterized in that: The extension ear 1 (14) and the extension ear 2 (15) are of the same size, and a circular groove is provided on the top of the extension ear 1 (14), and the circular groove passes through the extension ear 1 (14).

5. A plunger pump according to claim 1, characterized in that: One end of the pulling column (20) close to the fixing column (9) is connected to the fixing column (9), and the pulling column (20) and the fixing column (9) are fixedly assembled.

6. A plunger pump according to claim 1, characterized in that: The pulling column (20) is provided with an extension ring at one end close to the fixed column (9), and the extension ring is overlapped with one end of the second spring (19) close to the fixed column (9).

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