Wear-resistant slurry pump convenient to maintain

Abstract

The wear-resistant slurry pump convenient to maintain comprises a pump body assembly, and the pump body assembly comprises an oil cylinder, a first shell, a cylinder barrel, a piston assembly and a spiral device. The oil cylinder is located at the upper end of the cylinder barrel, the first shell is located at the lower end of the oil cylinder, the lower end of the first shell is fixedly connected with the cylinder barrel, and the spiral device is located at the upper end of the oil cylinder. The adjusting block is clamped through a wrench to drive the spiral sleeve to spirally ascend and descend in the threaded hole, the size of the space, located at the upper end of the first piston, in the oil cylinder is adjusted, the lifting range of the second piston at the lower end is changed, and the second piston breaks away from the interior of the cylinder barrel and enters the first shell to be maintained conveniently. Through the spiral device, the second piston can be automatically separated from the bottom ceramic cylinder barrel and enter a maintenance guidance area in the first shell, and replacement of accessories and maintenance or repair are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of mud pump technology, specifically to a wear-resistant mud pump that is easy to maintain. Background Technology

[0002] A mud pump is a machine used to deliver mud or water, or other flushing fluid, into the borehole during drilling. Mud pumps are an important component of drilling equipment. In commonly used positive circulation drilling, they deliver the surface flushing medium—clean water, mud, or polymer flushing fluid—under pressure through a high-pressure hose, swivel, and the center hole of the drill string directly to the bottom of the drill bit. This serves to cool the drill bit and remove and transport the cut rock cuttings to the surface.

[0003] Commonly used mud pumps are piston or plunger type, driven by a power unit that rotates the pump's crankshaft. The crankshaft, through a crosshead, drives the piston or plunger to reciprocate within the pump cylinder. The alternating action of the suction and discharge valves achieves the purpose of pressurizing and circulating the flushing fluid.

[0004] However, the pump bodies of most vertical mud pumps on the market are enclosed, making maintenance cumbersome and requiring external assistance such as overhead cranes or gantry cranes, causing significant inconvenience at the operating site. Furthermore, the inner wall of the cylinder is also made of metal, which is not wear-resistant, resulting in a less than ideal user experience. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model discloses a wear-resistant mud pump that is easy to maintain, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wear-resistant mud pump that is easy to maintain, comprising a pump body assembly, wherein the pump body assembly is symmetrically located on both sides of the mud pump, and the pump body assembly comprises a hydraulic cylinder, a first housing, a cylinder barrel, a piston assembly, and a screw device.

[0007] The hydraulic cylinder is located at the upper end of the cylinder barrel, the first housing is located at the lower end of the hydraulic cylinder, and the lower end of the first housing is fixedly connected to the upper surface of the cylinder barrel. The piston assembly is located inside the hydraulic cylinder and the cylinder barrel, and the helical device is located at the upper end of the hydraulic cylinder. The piston assembly includes a first piston, a piston rod, and a second piston. The first piston and the second piston are connected by a piston rod located between them. The first piston is located inside the hydraulic cylinder, and the second piston is located inside the cylinder barrel. The first piston and the second piston move up and down inside them.

[0008] The spiral device includes a spiral sleeve, a limiting plate, an adjusting block, and a hollow piston. The upper end of the cylinder has a threaded hole, and the spiral sleeve is located inside the threaded hole. The threaded structure of the outer wall of the spiral sleeve meshes with the inner wall of the threaded hole. The limiting plate is located at the upper end of the spiral sleeve, and the adjusting block is located on the upper wall of the limiting plate. The spiral sleeve has a rotating cavity inside, and a first oil pipe is located inside the rotating cavity. The first oil pipe is connected to an external oil tank and can rotate freely between itself and the spiral sleeve. The lower end of the first oil pipe extends along the lower end of the spiral sleeve, and the hollow piston is fixed. At the lower end of the first oil pipe, the hollow piston is located inside the oil cylinder and above the first piston. The edge of the hollow piston is in contact with the inner wall of the oil cylinder. The lower end of the first oil pipe is connected to a circular hole in the center of the hollow piston. Hydraulic oil is delivered to the inside of the oil cylinder through the circular hole. By engaging the adjusting block with a wrench, the spiral sleeve is driven to spiral up and down inside the threaded hole, thereby adjusting the size of the space above the first piston inside the oil cylinder and changing the lifting range of the second piston at the lower end. This allows the second piston to disengage from the cylinder and enter the first housing for easy maintenance.

[0009] Preferably, the cylinder is equipped with a hydraulic system, which includes a rodless chamber and a rod chamber. The rodless chamber is located in the area between the first piston and the hollow piston, and the rod chamber is located in the area at the lower end of the first piston. The rodless chamber is connected to an external oil circuit through a first oil pipe provided inside the spiral sleeve, and supplies hydraulic oil. The rod chamber is provided with an oil pipe port on the outer wall at the lower end of the cylinder. The rod chambers inside the two cylinders are connected by an arc-shaped oil pipe. The two ends of the arc-shaped oil pipe are respectively connected to the oil pipe ports on the two cylinders. A second oil pipe is provided in the middle of the arc-shaped oil pipe. The second oil pipe is connected to an external oil tank, and oil is drained during maintenance through the second oil pipe.

[0010] Preferably, the first oil pipe and the second oil pipe are respectively equipped with return oil valves, which are used to perform pressure relief operations inside the oil cylinder during maintenance.

[0011] Preferably, the first oil pipe and the spiral sleeve descend synchronously, and the spiral sleeve rotates around the first oil pipe.

[0012] Preferably, the lower end of the piston rod is fixedly connected to the second piston by a connecting member.

[0013] Preferably, a sensor is provided on the inner wall of the first housing. When the sensor detects that the second piston is moving upward and reaches the upper limit, the sensor receives a signal to reverse the direction, and the first piston drives the second piston to continue working downward.

[0014] Preferably, a ceramic component is provided inside the cylinder, and the ceramic component is in close contact with the inner wall of the cylinder.

[0015] Preferably, the outer wall of the first housing has several notches, through which the second piston, which has been raised to the inside of the first housing, can be repaired.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. In this utility model, a spiral device is set at the oil pipe connection position at the top of the cylinder. In normal operation, it is in a tightened state, which can protect the second piston from detaching from the bottom ceramic cylinder during operation, and has a positioning protection function. When maintenance is required, the working mode of the hydraulic system is switched to maintenance mode, the spiral device at the top of the cylinder is loosened, the hydraulic system works slowly, the first piston drives the second piston to slowly rise, the spiral device is loosened again to the maximum position, the hydraulic system continues to work slowly, at this time the second piston detaches from the bottom ceramic cylinder and rises to the maintenance guidance area in the first housing, which is convenient for replacing auxiliary parts, maintenance or repair.

[0018] 2. In this utility model, a layer of ceramic is embedded in the inner wall of the metal cylinder. The friction between the metal cylinder and the seal on the piston is changed to friction between the ceramic inner wall inside the metal cylinder and the seal on the piston. The wear resistance of ceramic is 80-100 times that of metal. This embedded ceramic cylinder not only solves the problem of the metal cylinder's lack of wear resistance, but also extends the service life of the cylinder by utilizing the advantages of ceramic such as wear resistance, corrosion resistance, high temperature resistance, and high hardness, which also extends the service life of the entire pump body. Attached Figure Description

[0019] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0020] In the attached diagram:

[0021] Figure 1 This is a schematic diagram of the overall structure of the mud pump of this utility model;

[0022] Figure 2 This is a side sectional view of the entire mud pump of this utility model;

[0023] Figure 3 This is a front sectional view of the mud pump of this utility model;

[0024] Figure 4 This is a schematic diagram of the piston assembly of this utility model;

[0025] Figure 5This is a schematic diagram of the spiral device of this utility model;

[0026] Figure 6 This is a schematic diagram of the internal structure of the spiral device of this utility model;

[0027] Labels in the diagram: 101, hydraulic cylinder; 102, first housing; 103, cylinder barrel; 104, sensor; 105, ceramic component; 106, notch; 201, first piston; 202, piston rod; 203, second piston; 204, connecting piece; 301, spiral sleeve; 302, limiting plate; 303, adjusting block; 304, threaded hole; 305, rotating cavity; 306, hollow piston; 401, rodless cavity; 402, rod cavity; 403, first oil pipe; 404, oil pipe opening; 405, bow-shaped oil pipe; 406, second oil pipe. Detailed Implementation

[0028] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0029] Example: Figure 1 As shown, a wear-resistant mud pump that is easy to maintain includes a pump body assembly, and the pump body assembly is symmetrically located on both sides of the mud pump. The pump body assembly includes a hydraulic cylinder 101, a first housing 102, a cylinder barrel 103, a piston assembly, and a screw device.

[0030] like Figures 2-4As shown, the hydraulic cylinder 101 is located at the upper end of the cylinder barrel 103, and the first housing 102 is located at the lower end of the hydraulic cylinder 101. The lower end of the first housing 102 is fixedly connected to the upper wall of the cylinder barrel 103. A sensor 104 is provided on the inner wall of the first housing 102. When the sensor 104 senses that the second piston 203 is moving upward and reaches the upper limit, the sensor 104 receives a signal to reverse the direction, and the first piston 201 drives the second piston 203 to continue to work downward. When the first piston 201 in the hydraulic cylinder 101 drives the second piston 203 in the ceramic cylinder 103 to move up and down, the second piston 203 in the ceramic cylinder 103 is limited by the sensor 104, causing the connected first piston 201 to stop at a certain position within the hydraulic cylinder 101, preventing damage to the hollow piston 306. This limiting function is to prevent the second piston 203 from detaching from the cylinder 103 and causing damage to the ceramic component 105 if the first piston 201 rises beyond the limit during machine operation. The outer wall of the first housing 102 has several notches 106 for maintenance of the second piston 203 that has risen into the first housing 102. The piston assembly is located inside the hydraulic cylinder 101 and the cylinder 103. The piston assembly, located at the upper end of the hydraulic cylinder 101, includes a first piston 201, a piston rod 202, and a second piston 203. The first piston 201 and the second piston 203 are connected by the piston rod 202 located between them. The lower end of the piston rod 202 is fixedly connected to the second piston 203 by a connecting member 204. The first piston 201 is located inside the hydraulic cylinder 101, and the second piston 203 is located inside the cylinder barrel 103. The first piston 201 and the second piston 203 move up and down inside each other. The second piston 203 is located at the connection between the bottom of the hydraulic cylinder 101 and the ceramic part 105 below it, with the upper opening of the ceramic part 105 facing downwards. The second piston 203 continuously performs alternating reciprocating motion inside the ceramic part 105.

[0031] like Figure 5 and Figure 6As shown, the spiral device includes a spiral sleeve 301, a limiting plate 302, an adjusting block 303, and a hollow piston 306. The upper end of the cylinder 101 has a threaded hole 304. The spiral sleeve 301 is located inside the threaded hole 304, and the threaded structure of the outer wall of the spiral sleeve 301 meshes with the inner wall of the threaded hole 304. The limiting plate 302 is located at the upper end of the spiral sleeve 301, and the adjusting block 303 is located on the upper wall surface of the limiting plate 302. A rotating cavity 305 is provided inside the spiral sleeve 301. The cylinder 101 is internally equipped with a first oil pipe 403, which is connected to an external oil tank. The first oil pipe 403 can rotate freely with the spiral sleeve. The lower end of the first oil pipe 403 extends along the lower end of the spiral sleeve, and the hollow piston 306 is fixed to the lower end of the first oil pipe 403. The hollow piston 306 is located inside the cylinder 101 and above the first piston 201. The edge of the hollow piston 306 is in contact with the inner wall of the cylinder 101. The lower end of the first oil pipe 403 is aligned with the center of the hollow piston 306. The provided circular holes are interconnected, and hydraulic oil is delivered to the inside of the cylinder 101 through these holes. By engaging the adjusting block 303 with a wrench, the spiral sleeve 301 is driven to spiral up and down within the threaded hole 304, thereby adjusting the space above the first piston 201 inside the cylinder 101 and changing the lifting range of the second piston 203 at the lower end. This allows the second piston 203 to disengage from the cylinder 103 and enter the first housing 102 for easy maintenance. The spiral device is normally in a tightened state, and its function is to... The second piston 203 will not detach from the outer ceramic component 105, thus preventing damage to the ceramic component 105 and providing positioning protection. When maintenance is required, the screw device at the top of the cylinder 101 is loosened, and the hydraulic system works slowly. The first piston 201 inside the cylinder 101 drives the second piston 203 to slowly rise. When the screw is turned to the maximum position, the hydraulic system continues to work slowly, and the second piston 203 will detach from the bottom cylinder 103, rise above the cylinder 103, and enter the interior of the first housing 102, i.e., the maintenance guidance area, where auxiliary parts can be replaced, maintained, or repaired.

[0032] like Figures 2-4As shown, the cylinder 101 is equipped with a hydraulic system, which includes a rodless chamber 401 and a rod chamber 402. The rodless chamber 401 is located in the area between the first piston 201 and the hollow piston 306, and the rod chamber 402 is located in the area at the lower end of the first piston 201. The rodless chamber 401 is connected to an external oil circuit through a first oil pipe 403 provided inside the spiral sleeve 301, and supplies hydraulic oil. The rod chamber is located on the outer wall at the lower end of the cylinder and is equipped with an oil pipe. The rod chambers 402 inside the two cylinders are connected by an arc-shaped oil pipe 405. The two ends of the arc-shaped oil pipe 405 are connected to the oil pipe ports 404 on the two cylinders respectively. A second oil pipe 406 is provided in the middle of the arc-shaped oil pipe 405. The second oil pipe 406 is connected to an external oil tank and is used to drain oil during maintenance. The first oil pipe 403 is equipped with a return oil valve, which is used to release pressure inside the cylinder 101 during maintenance.

[0033] Among them, such as Figure 3 As shown, a ceramic component 105 is located inside the cylinder 103. The ceramic component 105 is fitted to the inner wall of the cylinder 103, forming a ceramic cylinder 103. This ceramic cylinder 103 is formed by embedding a layer of ceramic component 105 into the inner wall of a metal cylinder. This transforms the friction between the metal cylinder and the piston seal into friction between the ceramic inner wall within the metal and the piston seal. The wear resistance of ceramic is 80-100 times that of metal. The advantages of ceramic, such as wear resistance, corrosion resistance, high temperature resistance, high hardness, and stability, determine that the use of a ceramic cylinder 103 is an inevitable trend. This embedded ceramic cylinder 103 not only solves the problem of the metal cylinder's lack of wear resistance, but also, due to the inherent wear and corrosion resistance of ceramic, extends the service life of the cylinder 103, thus extending the service life of the entire pump body.

[0034] When piston accessories need repair / maintenance, the working steps are as follows:

[0035] 1) First, locate the first oil pipe 403 connected to the screw device, open the return valve on the corresponding oil tank along the first oil pipe 403 to release the pressure in the oil cylinder 101, and then close the return valve.

[0036] 2) Using a special tool to rotate the adjusting block 303 of the screw device, when it is loosened halfway for the first time, in maintenance mode, jog the hydraulic system to push the pressure of one side cylinder 101 to the other side cylinder 101 through the arc-shaped oil pipe 405 connected by the oil pipe port 404 at the lower end of the two cylinders 101. The pressure between the two cylinders is transmitted to each other through the arc-shaped oil pipe 405. The pressure is delivered to the cylinder through the arc-shaped oil pipe 405. The first piston 201 rises into the cylinder 101 under the action of oil pressure. Since the first piston 201 and the second piston 203 are fixedly connected through the piston rod 202, the rise of the first piston 201 drives the second piston 203 to rise together.

[0037] 3) Loosen the return valve on the first oil pipe 403 for the second time to release the pressure until the screw device is turned to the maximum position. Close the return valve and continue to jog the hydraulic system. The first piston 201 will drive the second piston 203 to rise to the designated maintenance area of ​​the first housing 102 before maintenance work can be carried out.

[0038] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wear-resistant mud pump that is easy to maintain, characterized in that: The pump body assembly includes a pump body assembly, which is symmetrically located on both sides of the mud pump. The pump body assembly includes a hydraulic cylinder, a first housing, a cylinder barrel, a piston assembly, and a screw device. The hydraulic cylinder is located at the upper end of the cylinder barrel, the first housing is located at the lower end of the hydraulic cylinder, and the lower end of the first housing is fixedly connected to the upper surface of the cylinder barrel. The piston assembly is located inside the hydraulic cylinder and the cylinder barrel, and the helical device is located at the upper end of the hydraulic cylinder. The piston assembly includes a first piston, a piston rod, and a second piston. The first piston and the second piston are connected by a piston rod located between them. The first piston is located inside the hydraulic cylinder, and the second piston is located inside the cylinder barrel. The first piston and the second piston move up and down inside them. The spiral device includes a spiral sleeve, a limiting plate, an adjusting block, and a hollow piston. The upper end of the cylinder has a threaded hole, and the spiral sleeve is located inside the threaded hole. The threaded structure of the outer wall of the spiral sleeve meshes with the inner wall of the threaded hole. The limiting plate is located at the upper end of the spiral sleeve, and the adjusting block is located on the upper wall of the limiting plate. The spiral sleeve has a rotating cavity inside, and a first oil pipe is located inside the rotating cavity. The first oil pipe is connected to an external oil tank and can rotate freely between itself and the spiral sleeve. The lower end of the first oil pipe extends along the lower end of the spiral sleeve, and the hollow piston is fixed. At the lower end of the first oil pipe, the hollow piston is located inside the oil cylinder and above the first piston. The edge of the hollow piston is in contact with the inner wall of the oil cylinder. The lower end of the first oil pipe is connected to a circular hole in the center of the hollow piston. Hydraulic oil is delivered to the inside of the oil cylinder through the circular hole. By engaging the adjusting block with a wrench, the spiral sleeve is driven to spiral up and down inside the threaded hole, thereby adjusting the size of the space above the first piston inside the oil cylinder and changing the lifting range of the second piston at the lower end. This allows the second piston to disengage from the cylinder and enter the first housing for easy maintenance.

2. The wear-resistant mud pump that is easy to maintain according to claim 1, characterized in that: The cylinder is equipped with a hydraulic system, which includes a rodless chamber and a rod chamber. The rodless chamber is located in the area between the first piston and the hollow piston, and the rod chamber is located in the area at the lower end of the first piston. The rodless chamber is connected to an external oil circuit through a first oil pipe provided inside the spiral sleeve, and supplies hydraulic oil. The rod chamber is provided with an oil pipe port on the outer wall at the lower end of the cylinder. The rod chambers inside the two cylinders are connected by an arc-shaped oil pipe. The two ends of the arc-shaped oil pipe are respectively connected to the oil pipe ports on the two cylinders. A second oil pipe is provided in the middle of the arc-shaped oil pipe. The second oil pipe is connected to an external oil tank, and oil is drained during maintenance through the second oil pipe.

3. The wear-resistant mud pump that is easy to maintain according to claim 2, characterized in that: The first oil pipe and the second oil pipe are respectively equipped with return oil valves, which are used to release pressure inside the oil cylinder during maintenance.

4. The wear-resistant mud pump that is easy to maintain according to claim 3, characterized in that: The first oil pipe descends synchronously with the spiral sleeve, and the spiral sleeve rotates around the first oil pipe.

5. The wear-resistant mud pump that is easy to maintain according to claim 1, characterized in that: The lower end of the piston rod is fixedly connected to the second piston by a connecting member.

6. The wear-resistant mud pump that is easy to maintain according to claim 5, characterized in that: A sensor is provided on the inner wall of the first housing. When the sensor detects that the second piston is moving upward and reaches the upper limit, the sensor receives a signal to reverse the direction, and the first piston drives the second piston to continue working downward.

7. The wear-resistant mud pump that is easy to maintain according to claim 1, characterized in that: A ceramic component is installed inside the cylinder, and the ceramic component is in close contact with the inner wall of the cylinder.

8. The wear-resistant mud pump that is easy to maintain according to claim 1, characterized in that: The outer wall of the first housing has several notches, through which the second piston, which has been raised to the inside of the first housing, can be repaired.

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