Self-lubricating hydraulic drive slurry pump

Abstract

The utility model discloses a self-lubricating type hydraulic drive slurry pump which comprises a hydraulic drive cylinder, a hydraulic drive piston, a sealing box, a piston barrel, a fluid end pump head, a pull rod, a fluid end piston, a water suction body, a water outlet body and a lubricating liquid level indicator. The pull rods are installed on the left and right sides of the hydraulic driving piston, the hydraulic driving piston is installed in and in sliding fit with an inner cavity of the hydraulic driving cylinder, and the sealing boxes are installed on the left and right sides of the hydraulic driving cylinder and in sliding fit with the pull rods; piston cylinders are mounted at two ends of the left and right sealing boxes; fluid end pump heads are mounted at two ends of the left and right piston cylinders; the lubricating body is mounted at the lower end of the hydraulic driving cylinder and fixed by bolts; the water absorbing body is mounted at the lower ends of the left and right hydraulic end pump heads; the water outlet body is mounted at the upper ends of the left and right hydraulic end pump heads; the liquid level indicator is installed on the side of the lubricating body. The lubricating oil cavity is additionally arranged on the low-pressure side of the hydraulic end piston, so that the piston works in a lubricating state, the service life of the piston and the service life of the piston cylinder are prolonged, and the maintenance cost of equipment is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of mud pumps, and in particular relates to a self-lubricating hydraulically driven mud pump. Background Art

[0002] In the prior art, the hydraulic end working medium of the hydraulically driven mud pump is water or mud. The reciprocating motion of the piston in these media is basically a dry friction state without lubrication. Long-term operation causes severe wear of the piston, reduces the service life of the piston and piston cylinder, and increases the cost of equipment maintenance. Utility Model Content

[0003] The utility model aims to provide a self-lubricating hydraulically driven mud pump, which can make the piston work in a lubricated state by adding a lubricating oil cavity on the low-pressure side of the hydraulic end piston.

[0004] The utility model provides a self-lubricating hydraulically driven mud pump, comprising a hydraulically driven cylinder, a hydraulically driven piston, a sealing box, a piston barrel, a hydraulic end pump head, a pull rod, a hydraulic end piston, a water absorbing body, a water discharging body, and a lubricating body liquid level indicator;

[0005] The pull rod is installed on the left and right sides of the hydraulic drive piston through a threaded connection, the hydraulic drive piston is installed in the inner cavity of the hydraulic drive cylinder and slides together, the sealing box is installed on the left and right sides of the hydraulic drive cylinder and slides together with the pull rod, a number of sealing rings are installed in the inner hole of the sealing box to seal with the pull rod, the hydraulic end piston is respectively installed on the left and right pull rods and fixed by a nut; the piston cylinder is installed at both ends of the left and right sealing boxes, and its inner hole slides together with the hydraulic end piston; the hydraulic end pump head is installed at both ends of the left and right piston cylinders, and the left and right hydraulic end pump heads are connected to the hydraulic drive cylinder by bolts to press and fix the piston cylinder and the sealing box; the lubricating body is installed at the lower end of the hydraulic drive cylinder and fixed with bolts; the water absorption body is installed at the lower ends of the left and right hydraulic end pump heads and fixed with bolts, and its water absorption pipe passes through the inner cavity of the lubricating body and is sealed; the water outlet body is installed at the upper ends of the left and right hydraulic end pump heads and fixed with bolts; the liquid level indicator is installed on the side of the lubricating body;

[0006] The lower section of the hydraulic drive cylinder is symmetrically provided with a first lubrication channel and a second lubrication channel of right angles, which lead to the left and right end surfaces and the lower end surface of the hydraulic drive cylinder body respectively;

[0007] The lower section of the left sealing box is provided with a third lubricating channel of a Z-shaped hole, the right end of which is consistent with the hole diameter, hole number, hole spacing and position of the hydraulic drive cylinder body, and is sealed by a sealing ring, and the left end of which leads to the inner cavity of the left piston cylinder; the lower section of the right sealing box is provided with a fourth lubricating channel of an inverted Z-shaped hole, the left end of which is consistent with the hole diameter, hole number, hole spacing and position of the hydraulic drive cylinder body, and is sealed by a sealing ring, and the right end of which leads to the inner cavity of the right piston cylinder;

[0008] The diameters of the two ends of the inner cavity of the lubricating body are smaller than the diameter of the middle section, and the two ends are sealed with a water suction pipe by installing a sealing ring. The water suction pipe penetrates into the inner cavity of the lubricating body to form a first lubricating cavity inside the lubricating body. The upper end surface of the first lubricating cavity is provided with a fifth lubricating channel and a sixth lubricating channel leading to the inner cavity of the first lubricating body. The hole diameter, number of holes, hole spacing and position thereof are consistent with the lower end surface of the hydraulic drive cylinder and are sealed by a sealing ring; a threaded hole is provided in the middle position of the side surface of the lubricating body to communicate with the inner cavity, and an oil drain port is provided at the lower position to communicate with the lowest position of the inner cavity of the lubricating body;

[0009] The right end of the left piston cylinder is radially provided with a threaded hole communicating with the inner cavity, and the threaded hole is installed with a first exhaust valve. The left hydraulic end piston divides the left piston cylinder into a left working chamber and a second lubrication chamber; the left end of the right piston cylinder is radially provided with a threaded hole communicating with the inner cavity, and the threaded hole is installed with an exhaust valve. The right hydraulic end piston divides the right piston cylinder into a right working chamber and a third lubrication chamber.

[0010] Furthermore, the lubricating body is welded and provided with a liquid level gauge mounting hole and an oil drain hole. The water absorbing body is assembled. The lubricating body penetrates into the water absorbing body and is connected to the hydraulic drive cylinder by bolts. The lubricating body and the water absorbing body are sealed by an O-ring.

[0011] In this embodiment, the liquid level indicator is composed of a liquid level gauge seat and a liquid level gauge. An exhaust hole is provided on the top of the liquid level gauge seat and a second exhaust valve is installed for dust prevention.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] By adding a lubricating oil cavity on the low-pressure side of the hydraulic end piston, the piston works in a lubricated state, which increases the service life of the piston and piston cylinder and reduces the cost of equipment maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of the utility model self-lubricating hydraulically driven mud pump;

[0015] Figure 2 This is the layout diagram of the liquid level indicator of the utility model;

[0016] Figure 3 This is the layout diagram of the liquid level meter of the utility model.

[0017] Numbers in the figure:

[0018] 1-Hydraulic drive cylinder; 2-Hydraulic drive piston; 3-Sealing box; 4-Piston cylinder; 5-Hydraulic end pump head; 6-Tie rod; 7-Hydraulic end piston; 8-Water absorption body; 9-Water discharge body; 10-Lubricating body; 11-Liquid level indicator; 12-Nut; 13-Water absorption pipe; 14-First lubrication channel; 15-Second lubrication channel; 16-Third lubrication channel; 17-Fourth lubrication channel; 18-First lubrication chamber; 19-Fifth lubrication chamber; 20-Sixth lubrication chamber; 21-First exhaust valve; 22-Left working chamber; 23-Second lubrication chamber; 24-Right working chamber; 25-Third lubrication chamber; 26-Level gauge seat; 27-Level gauge; 28-Second exhaust valve. DETAILED DESCRIPTION

[0019] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0020] Ginseng Figures 1 to 3 As shown, this embodiment provides a self-lubricating hydraulically driven mud pump, including a hydraulically driven cylinder 1, a hydraulically driven piston 2, a sealing box 3, a piston cylinder 4, a hydraulic end pump head 5, a pull rod 6, a hydraulic end piston 7, a water absorption body 8, a water outlet body 9, a lubricating body 10, a liquid level indicator 11, etc.

[0021] The pull rod 6 is installed on the left and right sides of the hydraulic drive piston 2 through a threaded connection. The hydraulic drive piston 2 is installed in the inner cavity of the hydraulic drive cylinder 1 and slides with it. The sealing box 3 is installed on the left and right sides of the hydraulic drive cylinder 1 and slides with the pull rod 6. A number of sealing rings are installed in the inner hole of the sealing box 3 to seal with the pull rod 6. The hydraulic end piston 7 is installed on the left and right pull rods respectively and fixed by a nut 12; the piston cylinder 4 is installed at both ends of the left and right sealing boxes 3, and its inner hole is slidably matched with the hydraulic end piston 7; the hydraulic end pump head 5 is installed at both ends of the left and right piston cylinders, and the left and right hydraulic end pump heads are connected to the hydraulic drive cylinder 1 by bolts to press and fix the piston cylinder 4 and the sealing box 3; the lubricating body 10 is installed at the lower end of the hydraulic drive cylinder 1 and fixed with bolts; the water absorption body 8 is installed at the lower ends of the left and right hydraulic end pump heads and fixed with bolts, and its water absorption pipe 13 passes through the inner cavity of the lubricating body 10 and is sealed; the water outlet body 9 is installed at the upper ends of the left and right hydraulic end pump heads and fixed with bolts; the liquid level indicator 11 is installed on the side of the lubricating body 10.

[0022] The lower section of the hydraulic drive cylinder 1 is symmetrically provided with a right-angled channel first lubrication channel 14 and a second lubrication channel 15, which lead to the left and right end surfaces and the lower end surface of the hydraulic drive cylinder body 1 respectively; according to different conditions such as the cylinder body structure size and the size of the hydraulic end piston, the first lubrication channel and the second lubrication channel can be symmetrically arranged in one or more groups.

[0023] A third lubricating channel 16 of a Z-shaped hole is provided at the lower section of the left sealing box, the right end of which is consistent with the hole diameter, hole number, hole spacing and position of the hydraulic drive cylinder body 1, and is sealed by a sealing ring, and the left end of which leads to the inner cavity of the left piston cylinder; a fourth lubricating channel 17 of an inverted Z-shaped hole is provided at the lower section of the right sealing box, the left end of which is consistent with the hole diameter, hole number, hole spacing and position of the hydraulic drive cylinder body 1, and is sealed by a sealing ring, and the right end of which leads to the inner cavity of the right piston cylinder;

[0024] The diameters of both ends of the inner cavity of the lubricating body 10 are smaller than the diameter of the middle section, and the two ends are sealed with the water suction pipe 13 by installing sealing rings. The water suction pipe penetrates into the inner cavity of the lubricating body 13 to form a first lubricating cavity 18 inside the lubricating body. The upper end face of the first lubricating cavity 18 is provided with a fifth lubricating channel 19 and a sixth lubricating channel 20 leading to the inner cavity of the first lubricating body. The hole diameter, number of holes, hole spacing and position thereof are consistent with the lower end face of the hydraulic drive cylinder 1 and are sealed by a sealing ring; a threaded hole is provided in the middle position of the side of the lubricating body 10 to communicate with its inner cavity, and an oil drain port is provided at the lower position to communicate with the lowest position of the inner cavity of the lubricating body.

[0025] A threaded hole is radially arranged at the right end of the left piston cylinder, which is in communication with the inner cavity. A first exhaust valve 21 is installed in the threaded hole. The left hydraulic end piston divides the left piston cylinder into a left working cavity 22 and a second lubricating cavity 23. A threaded hole is radially arranged at the left end of the right piston cylinder, which is in communication with the inner cavity. An exhaust valve is installed in the threaded hole. The right hydraulic end piston divides the right piston cylinder into a right working cavity 24 and a third lubricating cavity 25. Hydraulic oil is injected into the lubricating cavity through the first exhaust valve 21 until the hydraulic oil height is about half of the piston cylinder height as observed by a liquid level gauge.

[0026] The lubricating body 10 is welded and provided with a liquid level gauge mounting hole and an oil drain hole. The water absorbing body 8 is assembled. The lubricating body 10 penetrates the water absorbing body 8 and is connected to the hydraulic drive cylinder 1 by bolts. The lubricating body 10 and the water absorbing body 8 are sealed by an O-ring.

[0027] The liquid level indicator 11 is composed of a liquid level gauge seat 26 and a liquid level gauge 27. An exhaust hole is provided on the top of the liquid level gauge seat and a second exhaust valve 28 is installed for dust prevention.

[0028] Hydraulic oil is injected into the lubrication cavity through the first exhaust valve 21 until the height of the hydraulic oil is about half of the height of the piston cylinder as observed by a liquid level gauge.

[0029] When the pump is working, the hydraulic drive piston 2 moves to the right, the oil in the second lubrication chamber 23 flows to the third lubrication chamber 25 through the third lubrication channel 16, the first lubrication channel 14, the fifth lubrication channel 19, the first lubrication chamber 18, the sixth lubrication channel 20, the second lubrication channel 15, and the fourth lubrication channel 17; when the hydraulic drive piston 2 moves to the left, the oil flows in the opposite direction, the piston moves left and right, and the lubrication chambers on both sides of the hydraulic drive cylinder body flow left and right through the lubrication body 10. Because the piston moves faster, the hydraulic oil in the lubrication chamber produces a splashing effect, and a layer of oil film is produced on the inner wall of the piston cylinder 4, which improves the lubricity of the piston and extends the service life of the piston and the piston cylinder.

[0030] The self-lubricating hydraulically driven mud pump increases the lubricating oil cavity on the low-pressure side of the hydraulic end piston, so that the piston works in a lubricated state, thereby increasing the service life of the piston and the piston cylinder and reducing the cost of equipment maintenance.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A self-lubricating hydraulically driven mud pump, characterized in that: It comprises a hydraulic drive cylinder (1), a hydraulic drive piston (2), a sealing box (3), a piston cylinder (4), a hydraulic end pump head (5), a pull rod (6), a hydraulic end piston (7), a water absorption body (8), a water discharge body (9), a lubricating body (10) and a liquid level indicator (11); The pull rod is installed on the left and right sides of the hydraulic drive piston (2) through a threaded connection. The hydraulic drive piston (2) is installed in the inner cavity of the hydraulic drive cylinder (1) and slides with it. The sealing box (3) is installed on the left and right sides of the hydraulic drive cylinder (1) and slides with the pull rod (6). A plurality of sealing rings are installed in the inner hole of the sealing box (3) to seal with the pull rod (6). The hydraulic end piston (7) is installed on the left and right pull rods respectively and fixed by a nut (12); the piston cylinder (4) is installed at both ends of the left and right sealing boxes (3), and its inner hole is slide-fitted with the hydraulic end piston (7); the hydraulic end piston (7) is installed on the left and right pull rods respectively and fixed by a nut (12); the piston cylinder (4) is installed at both ends of the left and right sealing boxes (3), and its inner hole is slide-fitted with the hydraulic end piston (7); The force end pump head (5) is installed at both ends of the left and right piston cylinders. The left and right hydraulic end pump heads are connected to the hydraulic drive cylinder (1) by bolts to press and fix the piston cylinder (4) and the sealing box (3); the lubricating body (10) is installed at the lower end of the hydraulic drive cylinder (1) and fixed by bolts; the water absorption body (8) is installed at the lower ends of the left and right hydraulic end pump heads and fixed by bolts, and its water absorption pipe (13) passes through the inner cavity of the lubricating body (10) and is sealed; the water outlet body (9) is installed at the upper ends of the left and right hydraulic end pump heads and fixed by bolts; the liquid level indicator (11) is installed on the side of the lubricating body (10); The lower section of the hydraulic drive cylinder (1) is symmetrically provided with a first lubricating channel (14) and a second lubricating channel (15) in the form of right-angled holes, which lead to the left and right end surfaces and the lower end surface of the hydraulic drive cylinder (1) respectively; A third lubricating channel (16) of a Z-shaped hole is provided at the lower section of the left sealing box, the right end of which is consistent with the hole diameter, hole number, hole spacing and position of the hydraulic drive cylinder (1), and is sealed by a sealing ring, and the left end of which leads to the inner cavity of the left piston cylinder; a fourth lubricating channel (17) of an inverse Z-shaped hole is provided at the lower section of the right sealing box, the left end of which is consistent with the hole diameter, hole number, hole spacing and position of the hydraulic drive cylinder (1), and is sealed by a sealing ring, and the right end of which leads to the inner cavity of the right piston cylinder; The diameters of the two ends of the inner cavity of the lubricating body (10) are smaller than the diameter of the middle section, and the two ends are sealed with a water suction pipe (13) by installing a sealing ring. The water suction pipe (13) penetrates into the inner cavity of the lubricating body (10) to form a first lubricating cavity (18) inside the lubricating body. The upper end surface of the first lubricating cavity (18) is provided with a fifth lubricating channel (19) and a sixth lubricating channel (20) leading to the first lubricating cavity. The hole diameter, number of holes, hole spacing and position are consistent with the lower end surface of the hydraulic drive cylinder (1) and are sealed by a sealing ring. A threaded hole is provided in the middle position of the side surface of the lubricating body (10) to communicate with the inner cavity, and an oil drain port is provided at the lower position to communicate with the lowest position of the inner cavity of the lubricating body. A threaded hole is radially arranged at the right end of the left piston cylinder and communicates with the inner cavity, a first exhaust valve (21) is installed in the threaded hole, and the left hydraulic end piston divides the left piston cylinder into a left working chamber (22) and a second lubrication chamber (23); a threaded hole is radially arranged at the left end of the right piston cylinder and communicates with the inner cavity, an exhaust valve is installed in the threaded hole, and the right hydraulic end piston divides the right piston cylinder into a right working chamber (24) and a third lubrication chamber (25).

2. The self-lubricating hydraulically driven mud pump according to claim 1, characterized in that: The lubricating body (10) is in a welded form and is provided with a liquid level gauge mounting hole and an oil drain hole. The water absorbing body (8) is in an assembled form. The lubricating body (10) penetrates into the water absorbing body (8) and is connected to the hydraulic drive cylinder (1) via bolts. The lubricating body (10) and the water absorbing body (8) are sealed via an O-ring.

3. The self-lubricating hydraulically driven mud pump according to claim 1, characterized in that: The liquid level indicator (11) is composed of a liquid level gauge seat (26) and a liquid level gauge (27); an exhaust hole is provided on the top of the liquid level gauge seat and a second exhaust valve (28) is installed for dust prevention.

Images