WO2021128037A1

WO2021128037A1 - Wear-resistant plunger slurry pump

Info

Publication number: WO2021128037A1
Application number: PCT/CN2019/128164
Authority: WO
Inventors: 吴凡; 练正钊; 吴文贵
Original assignee: 江苏盐邦泵业制造有限公司
Priority date: 2019-12-23
Filing date: 2019-12-25
Publication date: 2021-07-01
Also published as: CN110905758A

Abstract

A wear-resistant plunger slurry pump, comprising a transmission assembly (1), a plunger assembly (2), a sealed lubricating piece (3), and a pump body assembly (4); the plunger assembly (2) comprises: plunger wear-resistant sleeves (2-2), a plunger inner shaft (2-1), and sealing pieces (2-3); one end of the plunger inner shaft (2-1) is provided with a transmission head (2-5), and the other end is provided with a pressure head (2-6); the periphery of a middle part of the plunger inner shaft (2-1) is evenly provided with annular grooves (2-4); the sealing pieces (2-3) are disposed within the annular grooves (2-4) and are located between the plunger wear-resistant sleeves (2-2) and the plunger inner shaft (2-1); the plunger wear-resistant sleeves (2-2) are sleeved outside of the plunger inner shaft (2-1); a cross section of the pressure head (2-6) is greater than that of the transmission head (2-5); the periphery of two ends of the plunger wear-resistant sleeves (2-2) is provided with a thread and a pressure head mounting hole (2-7), and an inner thread is provided on an inner wall thereof; the size of the pressure head mounting hole (2-7) matches with the size of the pressure head (2-6); and the periphery of the pressure head (2-6) is provided with an outer thread. Since the symmetrically disposed plunger wear-resistant sleeves (2-2) are used, after one end is worn down, the plunger wear-resistant sleeves are turned around and again installed on the plunger inner shaft (2-1) to continue to be used, reducing maintenance and usage costs of a wear-resistant plunger slurry pump.

Description

A wear-resistant plunger mud pump

Technical field

The invention relates to the technical field of mud pumps, in particular to a wear-resistant plunger mud pump.

Background technique

At present, mud pump is a very important production equipment in the oilfield industry and an important part of drilling equipment. It is mainly used for deep and shallow well operations in oilfields. Cement plugging, channeling, well flushing, sand flushing and cementing operations, pressure testing of crude oil near and long distance transportation, etc.

The existing patent CN201810278700.5 is a kind of wear-resistant plunger mud pump. The plunger wear-resistant sleeve and plunger inner shaft can be processed separately. Only the plunger wear-resistant sleeve is made of wear-resistant material, which greatly reduces The cost of materials, the split structure, the difficulty of processing and the difficulty of heat treatment are greatly reduced. Although the plunger wear-resistant sleeve only needs to be replaced when worn, the plunger wear-resistant sleeve only wears severely with the sealing and lubricating component, and discarding it causes waste.

Summary of the invention

One of the objectives of the present invention is to provide a wear-resistant plunger mud pump, which adopts a symmetrically arranged plunger wear-resistant sleeve. When one end of the plunger wear-resistant sleeve is worn, it is rotated and then installed on the plunger inner shaft. , Continue to use, thereby saving the maintenance and use cost of wear-resistant plunger mud pump.

A wear-resistant plunger mud pump provided by an embodiment of the present invention includes: a transmission assembly, a plunger assembly, a sealing lubricating member, and a pump body assembly; one end of the plunger assembly is drivingly connected with the transmission assembly, and the other end penetrates into the pump body assembly ; The sealing lubrication piece is sleeved at the end of the plunger assembly close to the pump body assembly, and the sealing lubrication piece is fixedly connected with the pump body assembly; the plunger assembly includes: plunger wear sleeve, plunger inner shaft and seal; plunger inner shaft One end is provided with a transmission head, and the other end is provided with a pressure head; an annular groove is evenly arranged on the outer periphery of the inner shaft of the plunger; the seal is arranged in the annular groove and is located between the plunger wear sleeve and the plunger inner shaft; The plunger wear sleeve is sleeved outside the plunger inner shaft;

The cross section of the indenter is larger than that of the transmission head; both ends of the plunger wear sleeve are provided with threads, and both ends are provided with indenter mounting holes; internal threads are provided on the inner wall of the indenter mounting hole; indenter mounting holes Compatible with the size of the indenter; the outer circumference of the indenter is provided with an external thread.

Preferably, the plunger assembly further includes: a lining, sleeved on the end of the plunger inner shaft away from the indenter, and located between the inner wall of the indenter mounting hole of the plunger wear sleeve and the plunger inner shaft; the size of the lining It is compatible with the gap between the inner wall of the indenter mounting hole of the plunger wear sleeve and the plunger inner shaft.

Preferably, the transmission assembly includes: a motor, a turntable, a push rod, four guide posts, and a plunger assembly connector; the turntable is arranged at the output end of the motor; a connecting column is arranged on the surface of the turntable; one end of the push rod is rotatably connected with the connecting column , The other end is hinged to one end of the plunger assembly connector; the plunger inner shaft setting hole is provided in the middle of the end of the plunger connector away from the push rod, and the plunger inner shaft setting hole is compatible with the size of the transmission head; the plunger inner shaft setting The inner wall of the hole is provided with a thread; the plunger inner shaft setting hole is used to fix the plunger inner shaft; the plunger inner shaft setting hole is provided with a plunger wear-resistant sleeve setting hole; the plunger wear-resistant sleeve setting hole is provided with a thread on the inner wall The plunger wear-resistant sleeve setting hole is used to fix the plunger wear-resistant sleeve; the four guide posts penetrate from one end of the plunger assembly connector close to the push rod to the other end; one end of the guide post is fixedly connected with the housing.

Preferably, the indenter is of a stepped cylindrical shape, and a thread is provided on the outer circumference of the smaller diameter end of the indenter; the smaller diameter end of the indenter is fixedly connected to the indenter mounting hole through the thread.

Preferably, the pump body assembly includes: a pump body in which a compression cavity is arranged in the pump body, and the pressure head is arranged in the compression cavity; the cross section of the compression cavity is adapted to the cross section of the larger diameter end of the pressure head.

Preferably, the sealing lubricating element is sleeved on the outside of the middle of the plunger wear sleeve; the sealing lubricating element is fixedly connected to the pump body; the sealing lubricating element includes a housing, and the lubrication cavity inside the housing, and the plunger wear sleeve is lubricated through one end of the housing From the cavity to the other end of the housing, the plunger wear sleeve is sealed to the housing; a spiral cleaning element is arranged in the lubrication cavity, and the spiral cleaning element is provided with a spiral groove; the push column is set in the spiral groove at one end , The other end is fixed on the outside of the plunger wear-resistant sleeve; the spiral cleaning piece is provided with a plurality of hard bristles on the side facing the plunger wear-resistant sleeve.

Preferably, the outer circumference of the indenter with a larger diameter is uniformly provided with an annular groove, and a sealing ring is arranged in the annular groove.

Preferably, the pump body assembly further includes a water inlet valve and a water outlet valve; both the water inlet valve and the water outlet valve are in communication with the compression chamber; the water inlet valve and the water outlet valve both include: a setting seat, a valve plate, a central shaft and a spring; one end of the central shaft Fixedly connected with the setting seat, the outer periphery of the other end is provided with an annular cylindrical groove, the valve plate is sleeved on the central shaft, and one end of the valve plate is located in the annular cylindrical groove, and a spring is arranged between the valve plate and the central shaft. Set on the central axis.

Preferably, one end of the valve plate close to the central axis is set as an arc surface.

Preferably, a step is provided on the outer periphery of the valve plate, and the surface of the step is arc-shaped.

Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings.

The technical solutions of the present invention will be further described in detail below through the accompanying drawings and embodiments.

Description of the drawings

The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the attached picture:

Figure 1 is a schematic diagram of a wear-resistant plunger mud pump in an embodiment of the present invention;

Figure 2 is a schematic diagram of a transmission assembly in an embodiment of the present invention;

Figure 3 is a schematic diagram of a plunger assembly in an embodiment of the present invention;

Figure 4 is a schematic diagram of a sealed lubricating element in an embodiment of the present invention;

Figure 5 is a schematic diagram of a pump body assembly in an embodiment of the present invention;

Fig. 6 is a schematic diagram of a water inlet valve in an embodiment of the present invention.

In the picture:

1. Transmission components; 2. Plunger components; 3. Sealed lubricating parts; 4. Pump body components; 1-1, Motor; 1-2, turntable; 1-3, connecting column; 1-4, push rod; 1 -5, guide post; 1-6, plunger assembly connector; 1-7, plunger inner shaft setting hole; 1-8, plunger wear-resistant sleeve setting hole; 2-1, plunger inner shaft; 2- 2. Plunger wear sleeve; 2-3. Seal; 2-4. Annular groove; 2-5. Transmission head; 2-6. Indenter; 2-7. Indenter mounting hole; 2-8. Lining piece; 3-1, oil inlet; 3-2, push column; 3-3, spiral cleaning piece; 3-4, hard bristles; 3-5, spiral groove; 3-6, oil outlet; 4-1. Water inlet valve; 4-2. Water outlet valve; 4-3. Compression chamber; 4-11. Setting seat; 4-12. Central shaft; 4-13. Valve plate; 4-14. Spring; 4 -15. Annular cylindrical groove.

Detailed ways

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not used to limit the present invention.

The embodiment of the present invention provides a wear-resistant plunger mud pump, as shown in FIG. 1, comprising: a transmission assembly 1, a plunger assembly 2, a sealing lubricating member 3, and a pump body assembly 4; one end of the plunger assembly 2 and the transmission assembly 1 The transmission connection, the other end penetrates into the pump body assembly 4; the sealing lubricating member 3 is sleeved on the plunger assembly 2 at one end close to the pump body assembly 4, and the sealing lubricating member 3 is fixedly connected with the pump body assembly 4; the plunger assembly 2 includes ：The plunger wear sleeve 2-2, the plunger inner shaft 2-1 and the seal 2-3; one end of the plunger inner shaft 2-1 is provided with a transmission head 2-5, and the other end is provided with a pressure head 2-6 The outer circumference of the inner plunger shaft 2-1 is uniformly provided with annular grooves 2-4; the seal 2-3 is arranged in the annular groove 2-4 and located in the plunger wear sleeve 2-2 and the plunger inner shaft 2 -1; the plunger wear-resistant sleeve 2-2 is set outside the plunger inner shaft 2-1;

The cross section of the indenter 2-6 is larger than the cross section of the drive head 2-5; both ends of the plunger wear sleeve 2-2 are provided with threads on the outer circumference, and both ends are provided with indenter mounting holes 2-7; install in the indenter The inner wall of the hole 2-7 is provided with internal threads; the size of the indenter mounting hole 2-7 is adapted to the size of the indenter 2-6; the outer circumference of the indenter 2-6 is provided with an external thread.

The working principles and beneficial effects of the above technical solutions are:

When the plunger assembly 2 is installed, the external thread on the outer circumference of the indenter matches the internal thread provided in the indenter mounting hole to realize the connection between the plunger inner shaft 2-1 and the plunger wear sleeve 2-2. The drive head 2-5 of the plunger assembly 2 is in drive connection with the drive assembly 1; the pressure head 2-6 is arranged in the pump body assembly. The main wear position of the plunger of the plunger mud pump is the contact position with the seal wheel slide and the contact position of the body assembly; the position where the plunger connects to the transmission assembly 1 is almost not worn; turn the plunger wear sleeve 2-2 Then re-install it with the plunger inner shaft 2-1, and you can continue to use it. When both ends of the plunger wear-resistant sleeve 2-2 are worn out, replace the plunger wear-resistant sleeve 2-2 with a better one.

The wear-resistant plunger mud pump of the present invention adopts a symmetrically arranged plunger wear-resistant sleeve 2-2. When one end of the plunger wear-resistant sleeve 2-2 is worn, it is rotated and installed on the plunger inner shaft 2- 1. Continue to use, thereby saving the maintenance and use cost of wear-resistant plunger mud pump.

In one embodiment, the plunger assembly 2 further includes: a lining 2-8 sleeved on the end of the plunger inner shaft 2-1 away from the indenter 2-6, and located at the end of the plunger wear sleeve 2-2 Between the inner wall of the indenter mounting hole 2-7 and the plunger inner shaft 2-1; the size of the lining 2-8 is the size of the indenter mounting hole 2-7 of the plunger wear sleeve 2-2 and the inner wall of the plunger inner shaft 2- The gap between 1 is adapted.

The working principles and beneficial effects of the above technical solutions are as follows:

The substrate ensures that the central axis of the plunger wear-resistant sleeve 2-2 coincides with the central axis of the plunger inner shaft 2-1, and one end of the plunger inner shaft 2-1 passes through the indenter 2-6 and the plunger wear-resistant sleeve 2-2 connection, the other end is connected with the plunger wear sleeve 2-2 through the substrate to ensure the stability of the connection between the two.

In one embodiment, the transmission assembly 1 includes: a motor 1-1, a turntable 1-2, a push rod 1-4, four guide posts 1-5 and a plunger assembly connector 1-6; the turntable 1-2 is arranged at The output end of the motor 1-1; a connecting post 1-3 is provided on the disk surface of the turntable 1-2; one end of the push rod 1-4 is rotatably connected with the connecting post 1-3, and the other end is connected to the plunger assembly connector 1-6 One end is hinged; the plunger connector is provided with a plunger inner shaft setting hole 1-7 in the middle of one end away from the push rod 1-4, and the plunger inner shaft setting hole 1-7 is compatible with the size of the transmission head 2-5; The inner wall of the shaft setting hole 1-7 is provided with threads; the plunger inner shaft setting hole 1-7 is used to fix the plunger inner shaft 2-1; the plunger inner shaft setting hole 1-7 is covered with a plunger wear sleeve Setting holes 1-8; Plunger wear-resistant sleeve setting holes 1-8 are provided with threads on the inner wall; plunger wear-resistant sleeve setting holes 1-8 are used to fix the plunger wear-resistant sleeve 2-2; four guide posts 1- 5 From the end of the plunger assembly connector 1-6 close to the push rod 1-4 to the other end; one end of the guide post 1-5 is fixedly connected to the housing.

The motor 1-1 drives the turntable 1-2 to rotate, and the turntable 1-2 drives the push rod 1-4; the push rod 1-4 reciprocates the plunger assembly connector 1-6 on the guide post 1-5 to drive the plunger The component 2 reciprocates left and right, and during the reciprocating movement of the plunger component 2, the mud pump sucks the mud into the pump body and then discharges it. The four guide posts 1-5 penetrate the four corners of the plunger assembly connector 1-6 to ensure the smooth operation of the plunger assembly connector 1-6 and reduce the wear of the outer ring of the plunger assembly connector 1-6. The outer peripheral thread of the plunger wear-resistant sleeve 2-2 is matched with the thread on the inner wall of the plunger wear-resistant sleeve setting hole 1-8 to realize installation.

In order to realize the connection between the plunger wear sleeve 2-2 and the plunger inner shaft 2-1; in one embodiment, the indenter 2-6 is a stepped cylinder, and the diameter of the indenter 2-6 is smaller The outer circumference of one end is provided with a thread; the smaller diameter end of the indenter 2-6 is fixedly connected to the indenter mounting hole 2-7 through the thread. The thread of the indenter 2-6 is matched with the thread of the inner wall of the indenter mounting hole 2-7 of the plunger wear-resistant sleeve 2-2 to realize the connection between the plunger wear-resistant sleeve 2-2 and the plunger inner shaft 2-1 .

In one embodiment, the pump body assembly 4 includes: a pump body with a compression chamber 4-3 in the pump body, and the pressure head 2-6 is arranged in the compression chamber 4-3; the cross section of the compression chamber 4-3 and the pressure head 2 -6 The cross section of the larger diameter end is suitable. The outer circumference of the indenter 2-6 with a larger diameter is uniformly provided with an annular groove 2-4, and a sealing ring is arranged in the annular groove 2-4.

When the size of the pressure head 2-6 is the same as the size of the compression chamber 4-3, it can effectively prevent the mud from penetrating between the sealing lubricating part 3 and the plunger wear sleeve 2-2, the pump body assembly 4 and the plunger wear sleeve 2- 2; effectively reduce the wear of the plunger wear sleeve 2-2. The outer circumference of the indenter 2-6 with the larger diameter is the position in contact with the inner wall of the compression chamber 4-3; the sealing ring between the inner wall of the compression chamber 4-3 and the outer circumference of the indenter 2-6 with the larger diameter can effectively prevent mud penetration To between the sealing lubricating element 3 and the plunger wear-resistant sleeve 2-2, and between the pump body assembly 4 and the plunger wear-resistant sleeve 2-2; effectively reduce the wear of the plunger wear-resistant sleeve 2-2.

In one embodiment, the sealing lubricating element 3 is sleeved on the outside of the middle part of the plunger wear-resistant sleeve 2-2; the sealing lubricating element 3 is fixedly connected to the pump body; the sealing lubricating element 3 includes a housing, an internal lubrication cavity in the housing, and the plunger The wear-resistant sleeve 2-2 penetrates the lubrication cavity from one end of the housing to the other end of the housing, and the plunger wear-resistant sleeve 2-2 is connected to the housing in a sealed manner; a spiral cleaning element 3-3 is arranged in the lubrication cavity. A spiral groove 3-5 is provided on the type cleaning member 3-3; one end of the pushing column 3-2 is set in the spiral groove 3-5, and the other end is fixed on the outside of the plunger wear-resistant sleeve 2-2; the spiral cleaning member faces the column A plurality of hard bristles 3-4 are provided on one side of the plug wear sleeve 2-2.

When the plunger assembly 2 reciprocates, the column 3-2 is pushed to move in the spiral groove 3-5, driving the spiral cleaning member 3-3 to rotate, and the hard bristles 3-4 of the spiral cleaning member are wear-resistant to the plunger Clean the surface of the sleeve 2-2 to remove the mud adhered to the surface of the plunger wear-resistant sleeve 2-2 to prevent it from increasing the friction outside the plunger wear-resistant sleeve 2-2 and reduce the plunger wear-resistant sleeve 2-2 Of wear. Of course, the sealed lubricating element 3 also includes an oil inlet 3-1 and an oil outlet 3-6; the oil inlet 3-1 is connected to the oil barrel through an oil pump; the oil outlet 3-6 is through an oil-water separator, The filter device is connected with the oil drum.

In one embodiment, the pump body assembly 4 further includes a water inlet valve 4-1 and a water outlet valve 4-2; both the water inlet valve 4-1 and the water outlet valve 4-2) are in communication with the compression chamber 4-3; and the water inlet valve Both 4-1 and the outlet valve 4-2 include: a setting seat 4-11, a valve plate 4-13, a central shaft 4-12 and a spring 4-14; one end of the central shaft 4-12 is fixedly connected to the setting seat 4-11, The outer circumference of the other end is provided with an annular cylindrical groove 4-15, the valve plate 4-13 is sleeved on the central shaft 4-12, and one end of the valve plate 4-13 is located in the annular cylindrical groove 4-15, in the valve plate A spring 4-14 is arranged between 4-13 and the central shaft 4-12, and the spring 4-14 is sleeved on the central shaft 4-12. One end of the valve plate 4-13 close to the central axis 4-12 is set as an arc surface. A step is provided on the outer circumference of the valve plate 4-13, and the surface of the step is arc-shaped.

The fixed connection between one end of the central shaft 4-12 and the setting seat 4-11 is a threaded connection; when the valve plate 4-13 is worn out and needs to be replaced, directly remove the valve plate 4-13 and central shaft 4-12 from the setting seat 4- Unscrew the upper part 11, saving the time of replacing the valve piece 4-13. In addition, the spring 4-14 in the valve body is between the valve plate 4-13 and the central shaft 4-12, and does not directly contact the mud, which can better protect the spring 4-14 and ensure the service life of the spring 4-14.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

A wear-resistant plunger mud pump, comprising: a transmission assembly (1), a plunger assembly (2), a sealing lubricating element (3) and a pump body assembly (4); one end of the plunger assembly (2) is connected to the The transmission component (1) is connected in transmission, and the other end penetrates into the pump body component (4); the sealing lubricating member (3) is sleeved on the plunger component (2) close to the pump body component (4) The sealing lubricating member (3) is fixedly connected with the pump body assembly (4); the plunger assembly (2) includes: plunger wear sleeve (2-2), plunger inner shaft (2) -1) and a seal (2-3); one end of the plunger inner shaft (2-1) is provided with a transmission head (2-5), and the other end is provided with a pressure head (2-6); the column An annular groove (2-4) is uniformly arranged on the outer periphery of the middle part of the inner shaft (2-1); the sealing member (2-3) is arranged in the annular groove (2-4) and is located in the plunger Between the wear-resistant sleeve (2-2) and the plunger inner shaft (2-1); the plunger wear-resistant sleeve (2-2) is sleeved outside the plunger inner shaft (2-1) ; Its characteristic is that,

The cross section of the pressure head (2-6) is larger than the cross section of the transmission head (2-5); both ends of the plunger wear sleeve (2-2) are provided with threads on the outer periphery, and both ends are provided Indenter mounting hole (2-7); internal threads are provided on the inner wall of the indenter mounting hole (2-7); the size of the indenter mounting hole (2-7) and the indenter (2-6) Compatible; the outer circumference of the indenter (2-6) is provided with an external thread.
The wear-resistant plunger mud pump according to claim 1, wherein the plunger assembly (2) further comprises: a lining (2-8) sleeved on the plunger inner shaft (2-1 ) Is far from the end of the indenter (2-6) and is located on the inner wall of the indenter mounting hole (2-7) of the plunger wear sleeve (2-2) and the plunger inner shaft (2- 1) between; the size of the lining (2-8) and the inner wall of the pressure head mounting hole (2-7) of the plunger wear sleeve (2-2) and the plunger inner shaft (2-1 ) To adapt to the gap between.
The wear-resistant plunger mud pump according to claim 1, wherein the transmission assembly (1) comprises: a motor (1-1), a turntable (1-2), a push rod (1-4), four The guide post (1-5) and the plunger assembly connector (1-6); the turntable (1-2) is arranged at the output end of the motor (1-1); the turntable (1-2) ) A connecting column (1-3) is arranged on the disk surface; one end of the push rod (1-4) is rotatably connected with the connecting column (1-3), and the other end is connected with the plunger assembly connector (1-6) One end of the plunger connector is hinged; a plunger inner shaft setting hole (1-7) is provided in the middle of one end of the plunger connector away from the push rod (1-4), and the plunger inner shaft setting hole (1-7) ) Is compatible with the size of the transmission head (2-5); the inner wall of the plunger inner shaft setting hole (1-7) is provided with threads; the plunger inner shaft setting hole (1-7) is used for fixed setting The plunger inner shaft (2-1); the plunger inner shaft setting hole (1-7) is sheathed with a plunger wear-resistant sleeve setting hole (1-8); the plunger wear-resistant sleeve is provided The inner wall of the hole (1-8) is provided with threads; the plunger wear-resistant sleeve setting hole (1-8) is used to fix the plunger wear-resistant sleeve (2-2); the four guide posts (1 -5) From the end of the plunger assembly connector (1-6) close to the push rod (1-4) to the other end; one end of the guide post (1-5) is connected to the housing Fixed connection.
The wear-resistant plunger mud pump according to claim 1, wherein the pressure head (2-6) is a stepped cylindrical shape, and the pressure head (2-6) is located on the outer circumference of the smaller diameter end of the pressure head (2-6). A thread is provided; the smaller diameter end of the indenter (2-6) is fixedly connected with the indenter mounting hole (2-7) through the thread.
The wear-resistant plunger mud pump according to claim 4, characterized in that, the pump body assembly (4) comprises a pump body, the pump body is provided with a compression cavity (4-3), and the pressure head ( 2-6) is arranged in the compression cavity (4-3); the cross section of the compression cavity (4-3) is adapted to the cross section of the larger diameter end of the indenter (2-6).
The wear-resistant plunger mud pump according to claim 5, wherein the sealing lubricating element (3) is sleeved outside the middle of the plunger wear-resistant sleeve (2-2); the sealing lubricating element ( 3) It is fixedly connected to the pump body; the sealed lubricating member (3) includes a housing, an internal lubrication cavity in the housing, and the plunger wear sleeve (2-2) penetrates the housing from one end of the housing The lubrication cavity is connected to the other end of the housing, and the plunger wear sleeve (2-2) is in a sealed connection with the housing; a spiral cleaning element (3-3) is arranged in the lubrication cavity , The spiral cleaning member (3-3) is provided with a spiral groove (3-5); the pushing column (3-2), one end is set in the spiral groove (3-5), and the other end is fixed in the spiral groove (3-5). The outer side of the plunger wear-resistant sleeve (2-2); the spiral cleaning member is provided with a plurality of hard bristles (3-4) on the side facing the plunger wear-resistant sleeve (2-2).
The wear-resistant plunger mud pump according to claim 5, characterized in that the outer circumference of the pressure head (2-6) with a larger diameter is uniformly provided with annular grooves (2-4), and the annular groove (2-4) A sealing ring is arranged inside.
The wear-resistant plunger mud pump according to claim 5, wherein the pump body assembly (4) further comprises a water inlet valve (4-1) and a water outlet valve (4-2); the water inlet valve (4-1) and the outlet valve (4-2) are both in communication with the compression chamber (4-3); both the inlet valve (4-1) and the outlet valve (4-2) include: Seat (4-11), valve disc (4-13), central shaft (4-12) and spring (4-14); one end of the central shaft (4-12) is connected to the setting seat (4-11) It is fixedly connected, the outer periphery of the other end is provided with an annular cylindrical groove (4-15), the valve disc (4-13) is sleeved on the central shaft (4-12), and the valve disc (4- One end of 13) is located in the annular cylindrical groove (4-15), and the spring (4-14) is arranged between the valve disc (4-13) and the central shaft (4-12), The spring (4-14) is sleeved on the central shaft (4-12).
The wear-resistant plunger mud pump according to claim 8, wherein the end of the valve plate (4-13) close to the central shaft (4-12) is set as an arc surface.
The wear-resistant plunger mud pump according to claim 8, wherein a step is provided on the outer periphery of the valve plate (4-13), and the surface of the step is arc-shaped.