CN215804991U

CN215804991U - Make things convenient for mud pump cylinder liner, piston structure of dismouting

Info

Publication number: CN215804991U
Application number: CN202121514325.3U
Authority: CN
Inventors: 欧阳志强; 石卫民; 李明星; 卢春阳; 雷洁珩
Original assignee: Hengyang Zhongdi Equipment Prospecting Engineering Machinery Co ltd
Current assignee: Hengyang Zhongdi Equipment Prospecting Engineering Machinery Co ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2022-02-11
Anticipated expiration: 2031-07-05

Abstract

A mud pump cylinder sleeve and piston structure convenient to disassemble is characterized by comprising a mud pump main body, a pull rod, a clamp, a piston rod, a pump head assembly, a pump head connecting bolt, a piston, a cylinder sleeve, a pump head connecting plate, a top pressing plate, a compression stud and a compression nut; when the cylinder sleeve and the piston of the slurry pump are replaced, the heavy pump head assembly does not need to be detached, the cylinder sleeve and the piston rod with the weight far smaller than that of the pump head assembly are detached together with the piston, the replacement can be carried out, the operation requirements for replacing the easily damaged parts such as the cylinder sleeve and the piston are greatly reduced, the operation difficulty and the labor intensity are greatly reduced, in the process of disassembly and assembly, the whole man-made control is realized, the possibility of part damage is greatly reduced, the production cost is reduced while the working efficiency is greatly improved, and the slurry pump has popularization and application values.

Description

Make things convenient for mud pump cylinder liner, piston structure of dismouting

Technical Field

The utility model relates to the technical field of slurry pumps, in particular to a slurry pump cylinder sleeve and piston structure convenient to disassemble and assemble.

Background

At present, the relatively common large reciprocating mud pump (as shown in fig. 1) in the geological industry, the assembly structure of the pump head and the pump body, the working principle thereof is: a power machine of a mud pump main body (10) drives a crankshaft (1) to rotate, a connecting rod (2) converts rotation power from the crankshaft (1) into linear reciprocating power and transmits the linear reciprocating power to a crosshead (3), the crosshead (3) transmits reciprocating power to a piston (7) through a piston rod assembly consisting of a pull rod (4), a hoop (5) and a piston rod (6), so that the piston (7) forms reciprocating motion in a cylinder sleeve (8), and all related assemblies in the pump head assembly (9) are matched with the reciprocating motion of the piston (7) to form suction and pumping actions.

Because the piston at the front end of the piston rod assembly is made of rubber, the piston is easy to damage due to friction generated by continuous reciprocating motion of the piston in the cylinder sleeve and continuous positive and negative pressure from slurry, and therefore, in the mud pump, the cylinder sleeve and the piston are relatively common wearing parts, and the cylinder sleeve and the piston have decisive roles in the running process of the mud pump and need to be replaced once damage occurs;

in addition, according to the needs of construction projects, the main technical parameters of the slurry pump, namely flow and pressure, must be changed sometimes, but the prior art slurry pump has the disadvantages of large volume, heavy weight, high price and relatively troublesome connection auxiliary parts at a construction site, so that two or even more slurry pumps with different technical parameters cannot be prepared for replacement at the construction site, and at the moment, cylinder sleeves and pistons with different diameters must be replaced to adjust the technical parameters of equipment.

In the prior art, a method for replacing a cylinder sleeve and a piston of a slurry pump comprises the following steps:

step 1: firstly loosening a connecting bolt for connecting the pump head assembly, and detaching and moving the whole pump head assembly at one end of the slurry pump; then the clamp of the piston rod assembly is loosened and taken away, the pump body is operated at a low speed, the crankshaft is rotated, the connecting rod is driven to pull the pull rod of the piston rod assembly to retreat, and a certain distance is reserved between the pull rod and the piston rod;

step 2: then a cushion block with proper size is placed between the piston rod and the pull rod to prop against the piston rod, the pump body is operated at low speed, the crankshaft is continuously rotated to drive the connecting rod to push the pull rod of the piston rod assembly, the pull rod moves forwards, and the piston rod and the piston are pushed forwards out of one port of the slurry pump main body connected with the pump head assembly through the cushion block;

and step 3: the pump body is operated at low speed again, the crankshaft is rotated, the connecting rod is driven to pull the pull rod of the piston rod assembly to move back, and a certain distance is reserved between the pull rod and the cylinder sleeve;

and 4, step 4: then a cushion block with proper size is placed between the cylinder sleeve and the pull rod to be propped, then the pump body is operated at low speed, the pull rod is enabled to move forwards, and the cylinder sleeve is pushed forwards through the cushion block again to be ejected out from one port of the mud pump main body connected with the pump head assembly;

and 5: the old cylinder sleeve is detached, the cylinder sleeve with the proper inner diameter and the piston with the proper outer diameter are selected firstly, the cylinder sleeve with the proper inner diameter is installed at one port of the mud pump main body connected with the pump head assembly, then the piston with the proper outer diameter is fixedly connected with one end of the piston rod, the other end of the piston rod penetrates through the cylinder sleeve to be connected with the pull rod, the piston rod is clamped by the clamp, the pump head assembly is hoisted to the proper position, and the pump head assembly and the mud pump main body are connected and fastened through the connecting bolt to complete replacement.

According to the method, in the assembling structure of the cylinder sleeve and the piston of the slurry pump in the prior art, when the cylinder sleeve and the piston are disassembled and replaced, the whole pump head assembly needs to be disassembled, but the pump head assembly is heavy, hoisting equipment needs to be used during disassembly and assembly, and the workload and the labor intensity for disassembling and assembling the pump head assembly are large.

In addition, the cylinder sleeve is pushed out by the thrust generated by the operation of the main body of the slurry pump, and the pushing-out force and speed are not controllable, so that the cylinder sleeve is easy to crash and collide at the moment of being pushed out, and the damage is caused.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a mud pump cylinder sleeve and piston structure which is simple in structure, low in labor intensity of workers, not easy to damage parts and convenient to disassemble and assemble.

The utility model aims to provide a slurry pump cylinder sleeve and piston structure convenient to disassemble and assemble, which is characterized by comprising a slurry pump main body, a pull rod, a hoop, a piston rod, a pump head assembly, a pump head connecting bolt, a piston, a cylinder sleeve, a pump head connecting plate, a top pressure plate, a compression stud and a compression nut; the mud pump main body transmits the power output by the power machine to a pull rod through a crankshaft and a connecting rod, the pull rod is fixedly connected with one end of a piston rod through a hoop, the other end of the piston rod is fixedly connected with a piston and can axially reciprocate in a cylinder sleeve coaxial with the piston rod, and all related components in the pump head component are matched with the reciprocating motion of the piston to form suction and pumping actions;

the pump head connecting plate is arranged between the slurry pump main body and the pump head assembly, the pump head connecting plate is fixedly connected with the slurry pump main body, bolt holes, stud positioning holes and cylinder sleeve positioning holes are formed in the pump head connecting plate, and the pump head connecting bolts penetrate through the bolt holes in the pump head connecting plate to be fixedly connected with the pump head assembly, so that the slurry pump main body and the pump head assembly are fixedly connected;

the top pressure plate is annular, and a plurality of positioning holes which are the same in shape and coaxial with the stud positioning holes on the pump head connecting plate are distributed around the middle large circle;

one end of the compression stud penetrates through a stud positioning hole in the pump head connecting plate to be fixedly connected with the pump head assembly, the other end of the compression stud penetrates through a positioning hole in the top pressure plate to be in threaded fit connection with the compression nut, and when the compression nut is screwed in, the compression nut can push the top pressure plate towards the pump head connecting plate;

the cylinder liner pass the cylinder liner locating hole of pump head connecting plate and withstand the pump head subassembly, be equipped with the round boss on the outer wall of cylinder liner middle section, when precession gland nut impels the roof pressure plate, the step face of cylinder liner boss one side can be pushed down to the roof pressure plate, when continuing to precession gland nut, gland nut can promote the roof pressure plate, and then promotes the cylinder liner whole until the top is tight to the displacement of pump head subassembly to it is fixed with the cylinder liner.

The further scheme is as follows: the outer wall of the cylinder sleeve close to one end opening of the pull rod is provided with threads, and the cylinder sleeve is provided with a dismounting threaded sleeve with the same axial length as the threads and used for dismounting the piston and the cylinder sleeve.

The further scheme is as follows: the outer wall of the dismounting screw sleeve is provided with a plurality of uniformly distributed axial grooves around the axis, so that when the piston and the cylinder sleeve are dismounted, the piston and the cylinder sleeve are convenient to clamp and apply force, and the dismounting screw sleeve is rotated.

The utility model relates to a method for dismounting a cylinder sleeve and a piston mechanism of a slurry pump, which comprises the following steps:

1. loosening and taking down the clamp between the pull rod and the piston rod, and operating a power machine of the mud pump main body to enable the crankshaft to drive the pull rod to retreat through the connecting rod;

2. loosening and taking down the compression nut from the compression stud, and taking out the top pressure plate from a gap between the pull rod and the piston rod;

3. firstly, a compression nut is sleeved on a compression stud and is screwed, and then a top pressure plate is turned around and penetrates through a gap between a pull rod and a piston rod to be reversely mounted on the compression stud and a cylinder sleeve;

4. the disassembly threaded sleeve penetrates through a gap between the pull rod and the piston rod and is sleeved on a thread of the cylinder sleeve, a special clamping tool is used for rotating the disassembly threaded sleeve until the disassembly threaded sleeve presses the jacking plate, and then the disassembly threaded sleeve is repeatedly rotated for a plurality of times, so that the cylinder sleeve, the piston and the piston rod can be pulled out for replacement;

5. selecting a proper cylinder sleeve and a proper piston, fixedly connecting the piston to a piston rod, and installing the piston rod with the piston into the cylinder sleeve;

6. from the gap between the pull rod and the piston rod, the cylinder sleeve is provided with the installed piston rod and the piston and is installed in a cylinder sleeve positioning hole of the pump head connecting plate, so that the step surface on the inner side of the boss of the cylinder sleeve props against the pump head assembly;

7. the top pressure plate is firstly turned around and is sleeved on the cylinder sleeve and the compression stud in the forward direction, then the compression nut is sleeved on the compression stud, and the top pressure plate is screwed in until the top pressure plate tightly pushes against the step surface on the outer side of the boss of the cylinder sleeve;

8. the power machine of the main body of the slurry pump is operated, the pull rod is aligned and attached to the piston rod by utilizing the crankshaft and the connecting rod, and finally the pull rod is sleeved with the clamp for fastening, so that the replacement is completed.

The working principle of the dismounting screw sleeve when the cylinder sleeve and the piston are dismounted is as follows: after the dismounting screw sleeve is tightly pressed against the top pressure plate, due to the obstruction of the top pressure plate, the compression nut and the compression stud, when the dismounting screw sleeve continues to rotate, the dismounting screw sleeve can not continue to be pushed, and at the moment, the pulling force exerted on the cylinder sleeve by the dismounting screw sleeve is greater than the friction force between the cylinder sleeve and the pump head connecting plate, so that the cylinder sleeve is gradually separated from the mounting hole of the pump head connecting plate along with the screwing of the dismounting screw sleeve.

Compared with the prior art, when the cylinder sleeve and the piston of the slurry pump are replaced, the heavy pump head assembly does not need to be detached, and the cylinder sleeve and the piston rod which are much lighter than the pump head assembly and the piston only need to be detached, so that the replacement can be carried out, the operation requirements for replacing easily damaged parts such as the cylinder sleeve and the piston are greatly reduced, the operation difficulty and the labor intensity are greatly reduced, the whole manual control is realized in the disassembly and assembly process, the possibility of part damage is greatly reduced, the production cost is reduced while the working efficiency is greatly improved, and the slurry pump has popularization and application values.

Drawings

FIG. 1 is a schematic diagram of a prior art mud pump cylinder liner and piston configuration;

FIG. 2 is a schematic diagram of the construction of a mud pump cylinder sleeve and piston according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating a state of use of the removable insert according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a pump head connecting plate according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a cylinder liner structure according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a detachable nut in the embodiment of the present invention.

Detailed Description

The detailed structure of the present invention will be further described with reference to the accompanying drawings and the detailed description.

Example 1

As shown in fig. 2, a mud pump cylinder sleeve and piston structure convenient for disassembly and assembly comprises a mud pump main body 10, a pull rod 4, a hoop 5, a piston rod 6, a piston 7, a cylinder sleeve 8, a pump head assembly 9, a pump head connecting bolt 11, a pump head connecting plate 12, a top pressure plate 13, a compression stud 14 and a compression nut 15; the mud pump main body 10 transmits the power output by the power machine to the pull rod 4 through a crankshaft, a connecting rod and a crosshead therein, the pull rod 4 is fixedly connected with one end of a piston rod 6 through a hoop 5, the other end of the piston rod 6 is fixedly connected with a piston 7 and can axially reciprocate in a cylinder sleeve 8 coaxial with the piston rod 6, and all related components in a pump head component 9 are matched with the reciprocating motion of the piston 7 to form suction and pumping actions;

the pump head connecting plate 12 is arranged between the mud pump main body 10 and the pump head assembly 9, the pump head connecting plate 12 is fixedly connected with the mud pump main body 10, the pump head connecting plate 12 is rectangular plate-shaped, bolt holes 121, stud positioning holes 122 and cylinder sleeve positioning holes 123 are formed in the pump head connecting plate 12, and the pump head connecting bolts 11 penetrate through the bolt holes 121 in the pump head connecting plate 12 to be fixedly connected with the pump head assembly 9, so that the mud pump main body 10 and the pump head assembly 9 are fixedly connected;

the top pressure plate 13 is in a ring shape, and a plurality of positioning holes 131 which are the same in shape and coaxial with the stud positioning holes 122 on the pump head connecting plate 12 are distributed around the middle big circle;

one end of the compression stud 14 passes through a stud positioning hole 122 on the pump head connecting plate 12 to be fixedly connected with the pump head assembly 9, the other end of the compression stud passes through a positioning hole 131 on the top pressure plate 13 to be in threaded fit connection with the compression nut 15, and when the compression nut 15 is screwed in, the top pressure plate 13 is pushed towards the pump head connecting plate 12 by the compression nut 15;

the cylinder liner 8 passes through a cylinder liner positioning hole 123 of the pump head connecting plate 12 and props against the pump head assembly 9, a circle of boss 81 is arranged on the outer wall of the middle section of the cylinder liner 8, when the gland nut 15 is screwed in to push the top pressure plate 13, the top pressure plate 13 can press the step surface on one side of the cylinder liner boss 81, when the gland nut 15 is screwed in continuously, the gland nut 15 can push the top pressure plate 13, and then the cylinder liner 8 is pushed to move towards the pump head assembly 9 integrally until the top pressure is reached, so that the cylinder liner 8 is fixed.

As shown in fig. 3, the outer wall of the cylinder sleeve 8 near one end opening of the pull rod is provided with threads 82, and a dismounting screw sleeve 16 with the same axial length as the threads is arranged for dismounting the piston 7 and the cylinder sleeve 8.

The outer wall of the dismounting threaded sleeve 16 is provided with a plurality of axial grooves 161 which are uniformly distributed around the axis, so that when the piston 7 and the cylinder sleeve 8 are dismounted, the dismounting threaded sleeve 16 can be conveniently clamped and applied with force to rotate.

The embodiment also comprises a method for dismounting the cylinder sleeve and the piston of the slurry pump, which comprises the following steps:

step 1, loosening and removing a clamp 5 between a pull rod 4 and a piston rod 6, and operating a power machine of a slurry pump main body to enable a crankshaft to drive the pull rod 4 to retreat through a connecting rod;

step 2, loosening and taking down the compression nut 15 from the compression stud 14, and taking out the top pressure plate 13 from the gap between the pull rod 4 and the piston rod 6;

step 3, sleeving a compression nut 15 on a compression stud 14 and screwing the compression nut, turning the top pressure plate 13 around, penetrating the gap between the pull rod 4 and the piston rod 6 and reversely mounting the top pressure plate on the compression stud 14 and the cylinder sleeve 8;

step 4, the dismounting threaded sleeve 16 penetrates through a gap between the pull rod 4 and the piston rod 6 to be sleeved on the thread 82 of the cylinder sleeve 8, the dismounting threaded sleeve 16 is rotated by using a special clamping tool until the dismounting threaded sleeve 16 presses the jacking plate 13, and then the dismounting threaded sleeve 16 is repeatedly rotated for a plurality of times, so that the cylinder sleeve 8, the piston 7 and the piston rod 6 in the cylinder sleeve can be pulled out for replacement;

step 5, selecting a proper cylinder sleeve 8 and a proper piston 7, fixedly connecting the piston 7 to the piston rod 6, and installing the piston rod 6 with the piston 7 into the cylinder sleeve 8;

step 6, from the gap between the pull rod 4 and the piston rod 6, the cylinder sleeve 8 with the assembled piston rod 6 and the piston 7 is arranged in a cylinder sleeve positioning hole 123 of the pump head connecting plate 12, so that the step surface on the inner side of the cylinder sleeve boss 81 is propped against the pump head assembly 9;

step 7, the top pressure plate 13 is turned around and sleeved on the cylinder sleeve 8 and the compression stud 14 in the forward direction, then the compression nut 15 is sleeved on the compression stud 14, and the top pressure plate 13 is screwed in until the top pressure plate abuts against the outer side step surface of the cylinder sleeve boss 81;

and 8, operating a power machine of the mud pump main body, aligning and tightly attaching the pull rod 4 and the piston rod 6 by using a crankshaft and a connecting rod, and finally sleeving the clamp 5 for fastening to finish replacement.

Claims

1. A mud pump cylinder sleeve and piston structure convenient to disassemble and assemble is characterized by comprising a mud pump main body (10), a pull rod (4), a hoop (5), a piston rod (6), a piston (7), a cylinder sleeve (8), a pump head assembly (9), a pump head connecting bolt (11), a pump head connecting plate (12), a top pressing plate (13), a compression stud (14) and a compression nut (15); the mud pump main body (10) transmits power output by a power machine to a pull rod (4) through a crankshaft, a connecting rod and a crosshead in the mud pump main body, the pull rod (4) is fixedly connected with one end of a piston rod (6) through a hoop (5), the other end of the piston rod (6) is fixedly connected with a piston (7) and can axially reciprocate in a cylinder sleeve (8) coaxial with the piston rod (6), and all related components in a pump head component (9) are matched with the reciprocating motion of the piston (7) to form suction and pumping actions;

the pump head connecting plate (12) is arranged between the mud pump main body (10) and the pump head assembly (9), the pump head connecting plate (12) is fixedly connected with the mud pump main body (10), the pump head connecting plate (12) is rectangular plate-shaped, bolt holes (121), stud positioning holes (122) and cylinder sleeve positioning holes (123) are formed in the pump head connecting plate, and the pump head connecting bolt (11) penetrates through the bolt holes (121) in the pump head connecting plate (12) to be fixedly connected with the pump head assembly (9), so that the mud pump main body (10) and the pump head assembly (9) are connected and fixed;

the top pressure plate (13) is annular, and a plurality of positioning holes (131) which are the same as and coaxial with the stud positioning holes (122) on the pump head connecting plate (12) in shape are distributed around the middle big circle;

one end of the compression stud (14) penetrates through a stud positioning hole (122) on the pump head connecting plate (12) to be fixedly connected with the pump head assembly (9), the other end of the compression stud penetrates through a positioning hole (131) on the top pressure plate (13) to be in threaded fit connection with the compression nut (15), and when the compression nut (15) is screwed in, the top pressure plate (13) is pushed towards the pump head connecting plate (12) by the compression nut (15);

cylinder liner (8) pass cylinder liner locating hole (123) of pump head connecting plate (12) and withstand pump head subassembly (9), be equipped with round boss (81) on cylinder liner (8) middle section outer wall, when precession gland nut (15) impel roof pressure plate (13), the step face of cylinder liner boss (81) one side can be pushed down to roof pressure plate (13), when continuing to precession gland nut (15), gland nut (15) can promote roof pressure plate (13), and then promote cylinder liner (8) wholly to pump head subassembly (9) displacement until the top is tight, thereby it is fixed with cylinder liner (8).

2. The mud pump cylinder sleeve and piston structure convenient for disassembly and assembly as claimed in claim 1, wherein the outer wall of the cylinder sleeve (8) near one port of the pull rod is provided with a thread (82), and a disassembly screw sleeve (16) with the same axial length as the thread is provided for disassembling the piston (7) and the cylinder sleeve (8).

3. The mud pump cylinder sleeve and piston structure convenient for disassembly and assembly as claimed in claim 2, wherein the outer wall of the disassembly screw sleeve (16) is provided with a plurality of axial grooves (161) uniformly distributed around the axis, so that when the piston (7) and the cylinder sleeve (8) are disassembled, the piston and the cylinder sleeve are convenient to clamp and apply force, and the disassembly screw sleeve (16) is rotated.