Disc pump device and fracturing pump truck

Abstract

The invention discloses a disc pump device and a fracturing pump truck, and relates to the technical field of petroleum drilling equipment, the disc pump device comprises a disc pump assembly, the disc pump assembly comprises a driving piece and a friction wheel, and the friction wheel is connected with an output shaft of the driving piece; the first friction piece is arranged on the transmission shaft; the driving part is used for driving the friction wheel to rotate through the output shaft, the friction wheel is in friction contact with the first friction part during rotation, and the first friction part drives the transmission shaft to rotate; the transmission shaft is driven to rotate through the friction force between the friction wheel and the first friction piece, so that the purpose of slowly rotating the transmission shaft is achieved, a worker can clearly observe the motion state and the position of the fracturing pump plunger conveniently, and when it is observed that the plunger runs to the position where the worker considers that the plunger is most convenient to disassemble, the worker can conveniently disassemble the plunger. The pump turning device can be shut down in time for disassembly operation, manual pump turning by workers is not needed, and manpower consumption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling equipment, and in particular to a disc pump device and a fracturing pump truck. Background Art

[0002] Fracturing pump truck is a core technology for increasing the production of conventional oil and gas fields and exploiting oil and gas resources such as shale gas, shale oil, and coal gas layers. It is an important construction process in the exploration and development of medium and low permeability oil fields. In the fracturing construction operation, the oil field special fracturing pump truck is the main construction equipment. It belongs to the special vehicle equipment for oil and gas field drilling and production. Its main function is to inject high-pressure and large-displacement fracturing fluid into the oil and gas wells, press the formation open by pumping liquid into the formation, squeeze the proppant into the cracks, and improve the permeability of the oil and gas layer and the oil and gas recovery rate. The fracturing pump of the fracturing pump truck is one of the important core components in the fracturing operation. During the use of the fracturing pump truck, when replacing the plunger, packing and valve body seat of the fracturing pump, it is necessary to pump the pump. The purpose of pumping is also to check whether the pump shaft rotates flexibly, whether there is scraping noise between the pump and the motor components, etc. Only when it rotates flexibly can the motor be started, otherwise the motor may burn out. Therefore, the fracturing pump of the fracturing pump truck should be pumped at least one full circle before starting.

[0003] The conventional disc pumping method currently in common use is to use a special tool to insert the universal flange fork of the transmission shaft connected to the fracturing pump and to manually slowly rotate it to make the fracturing pump operate. Moreover, when it is necessary to remove the plunger, the plunger needs to be rotated to a certain position for easy removal of the clamp and the plunger. When it is necessary to remove the valve body and valve seat alone without removing the plunger, it is also necessary to rotate the plunger to a certain position for convenience. This disc pumping method requires sufficient manpower to drive the transmission shaft to rotate and observe the plunger position at the same time, which is time-consuming and labor-intensive. When there are not enough people, the disc pumping work takes a long time to complete. Summary of the invention

[0004] The main purpose of the present invention is to provide a disc pump device and a fracturing pump truck, aiming to solve the technical problem that the existing disc pump process is time-consuming and labor-intensive.

[0005] To achieve the above-mentioned purpose, the present invention proposes a disc pump device, which is used to perform disc pumping on a fracturing pump, and the fracturing pump is connected to a driving mechanism via a transmission shaft, and the driving mechanism is used to drive the transmission shaft to rotate, so as to drive the fracturing pump to operate through the transmission shaft; the disc pump device comprises: a disc pump assembly, the disc pump assembly comprises a driving member and a friction wheel, the friction wheel is connected to the output shaft of the driving member; a first friction member, the first friction member is arranged on the transmission shaft; the driving member is used to drive the friction wheel to rotate through the output shaft, and when the friction wheel rotates, it frictionally contacts with the first friction member, so that the first friction member drives the transmission shaft to rotate.

[0006] In one embodiment, the friction wheel is in intermittent friction contact with the first friction member when rotating.

[0007] In one embodiment, the friction wheel includes: a wheel disc, which is connected to the output shaft of the driving member; a second friction member, which is arranged on the wheel disc; the driving member is used to drive the wheel disc to rotate through the output shaft to drive the second friction member to rotate; the second friction member is in intermittent friction contact with the first friction member when rotating.

[0008] In one embodiment, the first friction member is a first friction ring sleeved on the outer edge of the transmission shaft, and the second friction member is a second friction ring sleeved on the outer edge of the wheel disc, and when the second friction ring rotates, its outer edge is in intermittent friction contact with the outer edge of the first friction ring.

[0009] In one embodiment, the outer edge of the second friction ring includes a friction portion and a non-friction portion connected end to end along its circumferential direction, and a gap is provided between the non-friction portion and the first friction ring when the second friction ring rotates, so that the friction portion is in intermittent friction contact with the first friction ring when the second friction ring rotates; or, the outer edge of the second friction ring includes a plurality of non-friction portions and a plurality of friction portions alternately arranged along its circumferential direction, and each of the non-friction portions has a gap with the first friction ring when the second friction ring rotates, so that the plurality of friction portions are in alternate friction contact with the first friction ring when the second friction ring rotates.

[0010] In one embodiment, the wheel disc is a circular disc, the wheel disc is concentrically arranged with the output shaft, and the thickness of the friction part is greater than the thickness of the non-friction part; or, the wheel disc is a circular disc, the wheel disc is eccentrically arranged with the output shaft, and the thickness of the friction part is equal to the thickness of the non-friction part; or, the wheel disc is a cam, the cam is concentrically arranged with the output shaft, and the thickness of the friction part is equal to the thickness of the non-friction part.

[0011] In one embodiment, a counterweight is further provided on the wheel disc, the counterweight is embedded in the wheel disc, or the counterweight is provided on at least one side of the wheel disc; the counterweight is used to separate the friction part from the first friction ring when the second friction ring is not rotating.

[0012] In one embodiment, the first friction ring is an annular closed structure sleeved on the outer edge of the transmission shaft.

[0013] In one embodiment, both the first friction ring and the second friction ring are friction rubber rings.

[0014] The present invention also provides a fracturing pump truck, comprising a fracturing pump and the disc pump device as described above.

[0015] The technical solution of the present invention adopts a disc pump device to automatically pump discs, the disc pump device includes a disc pump assembly and a first friction member, the disc pump assembly includes a driving member and a friction wheel; the first friction member is arranged on the transmission shaft; the driving member is used to drive the friction wheel to rotate through the output shaft, and the friction wheel is in friction contact with the first friction member when rotating, so that the first friction member drives the transmission shaft to rotate; because the transmission shaft is driven to rotate by the friction force between the friction wheel and the first friction member, the purpose of slowly rotating the transmission shaft is achieved, so that it is convenient for the staff to clearly observe the movement state and position of the fracturing pump plunger. When it is observed that the plunger has run to the position that the staff considers to be most convenient for disassembly, the disc pump device can be shut down in time for disassembly operation, and there is no need for the staff to manually pump, thereby reducing manpower consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 A schematic side view of the structure of a disc pump device according to an embodiment of the present invention;

[0018] Figure 2 A front structural schematic diagram of a disc pump device according to an embodiment of the present invention;

[0019] Figure 3 A front structural schematic diagram of a friction wheel in a disc pump device according to an embodiment of the present invention;

[0020] Figure 4 A schematic side structural diagram of a first friction ring and a second friction ring in a disc pump device in another embodiment of the present invention being in a friction contact state;

[0021] Figure 5 A front structural schematic diagram of a friction wheel in a disc pump device according to another embodiment of the present invention;

[0022] Figure 6 A front structural schematic diagram of a friction wheel in a disc pump device according to another embodiment of the present invention;

[0023] Figure 7 The present invention is a front structural schematic diagram of a friction wheel in a disc pump device according to another embodiment of the present invention.

[0024] Description of Figure Numbers:

[0025] 100. Disc pump device; 1. Disc pump assembly; 11. Driving member; 12. Output shaft; 13. Friction wheel; 131. Wheel disc; 131a. Cam; 132. Second friction member; 132a. Second friction ring; 132b. Friction protrusion; 1321. Friction part; 1322. Non-friction part; 14. Counterweight; 2. First friction member; 2a. First friction ring; 200. Transmission shaft.

[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] Fracturing pump trucks are a core technology for increasing the production of conventional oil and gas fields and exploiting oil and gas resources such as shale gas, shale oil, and coal gas layers. They are an important construction process in the exploration and development of medium and low permeability oil fields. In fracturing operations, oilfield-specific fracturing pump trucks are the main construction equipment and belong to special vehicles and equipment for drilling and production in oil and gas fields. Their main function is to inject high-pressure, large-volume fracturing fluid into oil and gas wells, pressurize the formation by pumping fluid into the formation, squeeze the proppant into the cracks, and increase the permeability of the oil and gas layer and the oil and gas recovery rate.

[0031] It is known to those skilled in the art that a fracturing pump is mainly composed of a power end and a hydraulic end, wherein the power end is used to transfer the energy of the power system to the hydraulic end, and the hydraulic end is used to transport liquid and convert mechanical energy into hydraulic energy.

[0032] Specifically, in the embodiments of the present invention, the structure of one of the fracturing pumps is listed as a reference, wherein the power end includes an input shaft, which is connected to an external driving mechanism through a transmission shaft, and the input shaft and the transmission shaft can be connected through a universal joint flange to achieve the purpose of transmission. The power end also includes a crankshaft, which transmits power to the input shaft through a group of meshing large and small gears. An eccentric crank is provided on the crankshaft, and the eccentric crank is connected to the plunger of the hydraulic end. When the crankshaft rotates, it drives the plunger to reciprocate. The hydraulic end mainly includes components such as a water inlet, a water outlet, a bushing and a packing to ensure accurate injection and control of high-pressure water. The bushing is mainly used to provide sliding space for the plunger, and the packing is mainly used to strengthen the sealing of the hydraulic end to prevent medium leakage.

[0033] During the use of the fracturing pump, when replacing the plunger, packing and valve body seat of the fracturing pump, the pump needs to be calibrated. The purpose of the pump calibrating is to check whether the pump shaft rotates flexibly and whether there is any scraping noise between the pump and the motor parts. Only when the rotation is flexible can the motor be started, otherwise the motor may burn out. Therefore, the fracturing pump of the fracturing pump truck should be calibrated at least one full circle before starting.

[0034] The conventional disc pumping method currently in common use is to use a special tool to insert the universal flange fork of the transmission shaft connected to the fracturing pump and to manually slowly rotate it to make the fracturing pump operate. Moreover, when it is necessary to remove the plunger, the plunger needs to be rotated to a certain position for easy removal of the clamp and the plunger. When it is necessary to remove the valve body and valve seat alone without removing the plunger, it is also necessary to rotate the plunger to a certain position for convenience. This disc pumping method requires sufficient manpower to drive the transmission shaft to rotate and observe the plunger position at the same time, which is time-consuming and labor-intensive. When there are not enough people, the disc pumping work takes a long time to complete.

[0035] The present invention proposes a disc pump device 100, which is used to disc pump a fracturing pump. The fracturing pump is connected to an external driving mechanism through a transmission shaft, and the external driving mechanism is used to drive the transmission shaft to rotate, so as to drive the fracturing pump to operate through the transmission shaft.

[0036] The external driving mechanism adopts an engine providing power in the prior art, such as a diesel engine, a gasoline engine, an electric motor, etc.

[0037] See also Figure 1 and Figure 2 In one embodiment of the present invention, the disc pump device 100 includes a disc pump assembly 1 and a first friction member 2, the disc pump assembly 1 includes a driving member 11 and a friction wheel 13; the friction wheel 13 is connected to the output shaft 12 of the driving member 11; the first friction member 2 is arranged on the transmission shaft 200; the driving member 11 is used to drive the friction wheel 13 to rotate through the output shaft 12, and when the friction wheel 13 rotates, it frictionally contacts with the first friction member 2, so that the first friction member 2 drives the transmission shaft 200 to rotate.

[0038] The technical solution of the present invention adopts a disc pump device 100 to disc pump the fracturing pump. When the fracturing pump is working normally, the fracturing pump is driven by an external driving mechanism through a transmission shaft 200. When the fracturing pump needs disc pumping, the external driving mechanism stops running, and the disc pump device 100 is operated. Specifically, the operating driving member 11 drives the friction wheel 13 to rotate through the output shaft 12. When the friction wheel 13 rotates, it frictionally contacts with the first friction member 2 set on the transmission shaft 200, so that the first friction member 2 drives the transmission shaft 200 to rotate, thereby driving the fracturing pump to operate. When it is necessary to replace the plunger, the current staff usually needs to manually disc it to replace the plunger. The plunger is rotated to the specified position for easy disassembly. Therefore, the current disk pump operation requires multiple workers to operate. The fracturing pump needs to be rotated to operate, and a worker needs to observe the position of the plunger. In this embodiment, the transmission shaft 200 is driven to rotate by the friction between the friction wheel 13 and the first friction member 2, so as to achieve the purpose of slowly rotating the transmission shaft, so that the worker can clearly observe the movement state and position of the fracturing pump plunger. When the plunger is observed to move to the position that the worker considers to be most convenient for disassembly, the disk pump device 100 can be shut down in time without the need for the worker to manually rotate the pump, thereby reducing manpower consumption.

[0039] Optionally, the driving element 11 includes but is not limited to a DC motor, an AC asynchronous motor, a permanent magnet synchronous motor, a switched reluctance motor, and the like.

[0040] Specifically, in this embodiment, the driving member 11 is a DC motor, which can directly draw power from the fracturing pump truck on which the fracturing pump is placed, without the need for additional energy devices, and is more convenient to use.

[0041] The friction contact can be understood as that during the contact between the friction wheel 13 and the first friction member 2, the friction force generated when at least part of the contact is in place can drive the first friction member 2 to move, so that the first friction member 2 drives the transmission shaft 200 to rotate, thereby achieving the effect of a disc pump.

[0042] Furthermore, the friction wheel 13 is in intermittent friction contact with the first friction member 2 when rotating.

[0043] It can be understood that intermittent friction contact can be understood as that during the rotation of the friction wheel 13, only part of the position can contact the first friction part 2, and there are some positions that do not contact the first friction part 2, thereby achieving intermittent friction to drive the first friction part 2 to move, thereby achieving the purpose of slowing down the operation of the fracturing pump.

[0044] In addition, in some other embodiments, the friction wheel 13 always maintains frictional contact with the first friction part 2 when rotating. One way is: during the process of the friction wheel 13 rotating one circle, there is a part of the position when it contacts with the first friction part 2, the friction force generated can drive the first friction part 2 to move, and at the same time, there is also a part of the position when it contacts with the first friction part 2. The friction force generated is not enough to drive the first friction part 2 to move, thereby achieving intermittent friction to drive the first friction part 2 to move, and achieving the purpose of slowing down the fracturing pump; another way is: the friction force generated when each part of the friction wheel 13 contacts with the first friction part 2 can drive the first friction part 2 to move, so as to achieve the purpose of uniform and slow operation of the fracturing pump.

[0045] Furthermore, the friction wheel 13 includes a wheel disc 131 and a second friction member 132, the wheel disc 131 is connected to the output shaft 12 of the driving member 11, and the second friction member 132 is arranged on the wheel disc 131; the driving member 11 is used to drive the wheel disc 131 to rotate through the output shaft 12 to drive the second friction member 132 to rotate; when the second friction member 132 rotates, it intermittently frictionally contacts with the first friction member 2.

[0046] It can be understood that the wheel disc 131 is mainly used to support the second friction member 132 so that sufficient friction force can be generated between the second friction member 132 and the first friction member 2 when the second friction member 132 contacts the first friction member 2 .

[0047] Optionally, the wheel disc 131 and the second friction member 132 may be integrated or separated.

[0048] Preferably, the second friction member 132 is made of a material with a certain elasticity that can provide a relatively large friction force, including but not limited to: rubber, silicone, plastic, etc.; the wheel 131 is made of a rigid material.

[0049] Furthermore, the first friction member 2 is a first friction ring 2a sleeved on the outer edge of the transmission shaft 200, and the second friction member 132 is a second friction ring 132a sleeved on the outer edge of the wheel disc 131. When the second friction ring 132a rotates, its outer edge intermittently frictionally contacts the outer edge of the first friction member 2.

[0050] It can be understood that in this embodiment, both the first friction member 2 and the second friction member 132 are friction rings. The first friction ring 2a can be sleeved at any position of the transmission shaft 200. It is only necessary to make the first friction ring 2a correspond to the position of the second friction ring 132a and set them in parallel so that the two can contact each other. In this embodiment, the second friction ring 132a is sleeved on the outer edge of the wheel disc 131. Therefore, the wheel disc 131 is also in the same plane as the first friction ring 2a. Since the positions of the wheel disc 131 and the transmission shaft 200 are fixed in advance, the first friction ring 2a and the second friction ring 132a can be made to contact and squeeze each other to increase the friction force, thereby easily achieving the purpose of indirectly driving the first friction ring 2a to move.

[0051] See also Figure 4 In another embodiment of the present invention, the second friction ring 132a can be arranged on the side of the wheel disc 131, which is the side of the wheel disc 131 away from the driving member 11. At this time, the wheel disc 131 and the second friction ring 132a are not in the same plane, so that part of the edge of the wheel disc 131 is overlapped with the first friction ring 2a but not in contact, so that the second friction ring 132a arranged on the side of the wheel disc 131 can be in friction contact with the side of the first friction ring 2a.

[0052] See also Figure 5 In another embodiment of the present invention, the second friction member 132 may be a friction protrusion 132b disposed on the wheel disc 131. The shape of the friction protrusion 132b is not limited. When the wheel disc 131 rotates, the friction protrusion 132b is in intermittent friction contact with the first friction ring 2a. In addition, the number of the friction protrusions 132b may be multiple, including but not limited to 2, 3, 4, 5, etc. When there are multiple friction protrusions 132b, each friction protrusion 132b is spaced apart, that is, a portion between two adjacent friction protrusions 132b does not contact the first friction ring 2a, thereby achieving the purpose of intermittent friction contact.

[0053] Please read further Figure 3 Furthermore, the outer edge of the second friction ring 132a includes a friction portion 1321 and a non-friction portion 1322 connected end to end along its circumference, and there is a gap between the non-friction portion 1322 and the first friction ring 2a when the second friction ring 132a rotates, so that the friction portion 1321 is in intermittent friction contact with the first friction ring 2a when the second friction ring 132a rotates.

[0054] It can be understood that in this embodiment, the second friction ring 132a is an annular closed structure sleeved on the wheel disc 131, so that the second friction ring 132a can be more conveniently sleeved on the wheel disc 131 without the need for some additional fixing structures, and is also very stable. At the same time, since the second friction ring 132a maximizes the contact area around the outer edge of the wheel disc 131, the friction between the two is also greater. When the second friction ring 132a contacts the first friction ring 2a, the large friction between the second friction ring 132a and the wheel disc 131 makes it difficult for the second friction ring 132a to slip on the wheel disc 131.

[0055] When the second friction ring 132a rotates, the friction portion 1321 is in friction contact with the second friction ring 132a, and the non-friction portion 1322 is not in contact with the first friction ring 2a. Therefore, it can be understood that during the process of the wheel 131 rotating one circle, the second friction ring is not in contact with the first friction ring 2a all the time. Only the friction portion 1321 can be in contact with the first friction ring 2a during one rotation, and there is a part of the time when the second friction ring 132a and the first friction ring 2a are separated to achieve intermittent friction contact.

[0056] The ratio of the friction portion 1321 to the circumference of the second friction ring 132a is not limited, and it is only necessary to ensure that the friction portion 1321 can drive the first friction ring 2a to move after contacting the first friction ring 2a.

[0057] Optionally, the friction portion 1321 may account for a proportion of, but not limited to, 1 / 6, 1 / 5, 1 / 4, 1 / 3, 1 / 2, etc. of the overall circumference of the second friction ring 132a. Specifically, in the present embodiment, the friction portion 1321 accounts for 1 / 2 of the circumference of the friction ring, i.e., during the time that the second friction ring 132a rotates at a constant speed for one circle, it can contact the first friction ring 2a and drive the first friction ring 2a to move for half of the time, and the first friction ring 2a is not in contact with the second friction ring 132a for the other half of the time.

[0058] It can be understood that the outer edge of the friction part 1321 is also a part of the outer edge of the second friction ring 132a. In some other embodiments, the outer edge of the friction part 1321 can be provided with an anti-slip structure to increase the friction force, such as spaced convex stripes. In this case, the friction part 1321 is in friction contact with the first friction ring 2a through the convex stripes.

[0059] See also Figure 6 In another embodiment of the present invention, the outer edge of the second friction ring 132a includes a plurality of non-friction portions 1322 and a plurality of friction portions 1321 alternately arranged along its circumference, and each non-friction portion 1322 has a gap with the first friction ring 2a when the second friction ring 132a rotates, so that the plurality of friction portions 1321 are in alternate frictional contact with the first friction ring 2a when the second friction ring 132a rotates.

[0060] It can be understood that the outer edge of the second friction ring 132a includes a plurality of non-friction portions 1322 and a plurality of friction portions 1321 alternately arranged along its circumference, that is, along the circumference of the outer edge of the second friction ring 132a, there is a non-friction portion 1322 between any two adjacent friction portions 1321, and there is a friction portion 1321 between any two adjacent non-friction portions 1322. The alternating frictional contact between the multiple friction parts 1322 and the first friction ring 2a can be understood as, in the process of two adjacent friction parts 1322 alternating frictional contact with the first friction ring 2a, first one of the friction parts 1322 frictionally contacts the first friction ring 2a, then the second friction ring 132a continues to rotate and separates from the first friction ring 2a, and then the other friction part 1322 contacts the first friction ring 2a again, so as to achieve intermittent frictional contact between the second friction ring 132a and the first friction ring 2a when rotating; by providing multiple friction parts 1321, the frictional contact between the second friction ring 132a and the first friction ring 2a can be made more frequent, and the friction force that drives the driving member to rotate can be better generated.

[0061] It can be understood that when a plurality of friction parts 1321 are provided, the lengths of each friction part 1321 may be unequal, and the shape of the friction part 1321 is not specifically limited in this embodiment.

[0062] In other embodiments, the second friction ring 132 a may also be a discontinuous non-closed ring structure, and in this case, the non-friction portion 1322 may be a portion connected to the friction portion 1321 and used to fix the friction portion 1321 .

[0063] Furthermore, the wheel disc 131 is a circular disc, the wheel disc 131 is concentrically arranged with the output shaft 12 , and the thickness of the friction portion 1321 is greater than the thickness of the non-friction portion 1322 .

[0064] It can be understood that the concentric setting means that the output shaft 12 and the wheel disc 131 rotate around the same rotation center point, and the rotation center point is also the center point of the wheel disc 131. Therefore, during rotation, the outer edge of the wheel disc 131 always maintains the same distance from the second friction ring 132a. By setting the thickness of the friction portion 1321 to be greater than the thickness of the non-friction portion 1322, the distance between the outer edge of the friction portion 1321 and the center point of the wheel disc 131 is farther than the distance between the outer edge of the non-friction portion 1322 and the center point of the wheel disc 131, so that only the friction portion 1321 can frictionally contact with the first friction ring 2a, thereby achieving the purpose of intermittent frictional contact between the second friction ring 132a and the first friction ring 2a when the second friction ring 132a rotates.

[0065] In another embodiment, the wheel disc 131 is a circular disc, the wheel disc 131 is eccentrically disposed with respect to the output shaft 12 , and the thickness of the friction portion 1321 is equal to the thickness of the non-friction portion 1322 .

[0066] It can be understood that the eccentric setting means that the rotation center point around which the output shaft 12 and the wheel disc 131 rotate is not the center point of the wheel disc 131, so that when the wheel disc 131 rotates, part of the outer edge that is more than a certain distance away from the rotation center point can make frictional contact with the second friction ring 132a. At this time, the second friction ring 132a can be set to a ring structure with uniform thickness, and the friction part 1321 and the non-friction part 1322 have equal thickness. At this time, due to the eccentric setting of the wheel disc 131, part of the second friction ring 132a on the outer edge of the wheel disc 131 that is more than a certain distance away from the rotation center point can contact the first friction ring 2a, thereby achieving the purpose of intermittent friction.

[0067] See also Figure 7 In another embodiment of the present invention, the wheel disc 131 is a cam 131a, the cam 131a is concentrically arranged with the output shaft (12), and the thickness of the friction portion 1321 is equal to the thickness of the non-friction portion 1322.

[0068] It can be understood that the cam 131a can be understood as a wheel that is non-circular, and at least one outer edge thereon has a different distance from the rotation center point of the output shaft 12 than the distance from the outer edges of other parts of the cam 131a to the rotation center point of the output shaft 12. It can also be understood that the distances from the outer edges of the cam 131a to the rotation center point of the output shaft 12 vary within a range, so that the distances from the second friction ring 132a arranged on the outer edge to the rotation center point of the output shaft 12 are large or small, so that the friction part 1321 is farther from the rotation center point than the non-friction part 1322, so that only the friction part 1322 can contact the first friction ring 2a, thereby achieving the purpose of intermittent friction contact between the second friction ring 132a and the first friction ring 2a when rotating.

[0069] The cam 131a may be, for example, elliptical, or a disc with a portion of the outer edge protruding outward so that the entire cam 131a has an irregular shape. The thickness of the friction portion 1321 and the non-friction portion 1322 may be equal, or may be unequal depending on the specific shape of the wheel 131.

[0070] In this embodiment, the preferred solution is that the thickness of the friction part 1321 is equal to the thickness of the non-friction part 1322. From the perspective of manufacturing technology, such a design is easier to manufacture, and has more uniform toughness and is not easy to break.

[0071] Please continue reading Figure 2Furthermore, a counterweight 14 is provided on the wheel disc 131, the counterweight 14 is embedded in the wheel disc 131, or a counterweight 14 is provided on at least one side of the wheel disc 131; the counterweight 14 is used to separate the friction portion 1321 from the first friction ring 2a when the second friction ring 132a is not rotating.

[0072] It can be understood that the weight of the wheel disc 131 itself is evenly set. By setting the counterweight block 14, when the wheel disc 131 is not rotating, the gravity of the counterweight block 14 will automatically adjust the state of the wheel disc 131, so that the friction part 1321 is separated from the first friction ring 2a, and the staff no longer needs to manually adjust the state of the wheel disc 131. The purpose of separating the first friction ring 2a and the second friction part 132 is to prevent the disc pump device 100 from affecting the normal operation of the subsequent fracturing pump.

[0073] When the counterweight 14 is embedded in the wheel disc 131, the connection between the counterweight 14 and the wheel disc 131 is more tightly secured so that the counterweight 14 will not fall off during the rotation of the wheel disc 131; when the counterweight 14 is arranged on the side of the wheel disc 131, the wheel disc 131 can directly adopt any existing complete and uniformly distributed circular disc. A complete and uniformly distributed circular disc is easier to manufacture from a manufacturing process point of view, and there is no need to pre-set a structure for connecting the counterweight 14 or reserve an installation area thereon. At the same time, the counterweight 14 can also be of any shape, and the above-mentioned beneficial effects can be achieved by firmly fixing the counterweight 14 by bonding or welding.

[0074] Optionally, more than one counterweight block 14 may be provided, and one counterweight block 14 may be provided on each side of the wheel disc 131. The two counterweight blocks 14 are provided corresponding to each other so that the gravity on both sides of the wheel disc 131 can be balanced and not easily tilted.

[0075] Specifically, in this embodiment, only one counterweight 14 is provided, and is disposed on the side of the wheel disc 131 away from the driving member 11 .

[0076] Furthermore, the first friction ring 2 a is an annular closed structure sleeved on the outer edge of the transmission shaft 200 .

[0077] It can be understood that the closed structure is more stable and less likely to break or fracture under stress.

[0078] As a preferred embodiment, the first friction ring 2a is a circular ring with uniform thickness.

[0079] Furthermore, the first friction ring 2a and the second friction ring 132a are both friction rubber rings.

[0080] The first friction ring 2a and the second friction ring 132a are both made of a material with certain elasticity and friction force to enhance the friction force generated when the two are in contact. Optionally, the first friction ring 2a and the second friction ring 132a can be rubber rings, silicone rings, plastic rings, etc.

[0081] In addition, in some embodiments, the disc pump device 100 also includes a remote control system, which can be set in a remote control or downloaded to the staff's mobile phone through an app. The staff controls the disc pump assembly 1 through the remote control or mobile phone to control the operation and stop of the drive member 11.

[0082] At this time, a worker can operate the disc pump device 100 by himself, and generally observe the position change of the plunger. One worker can complete the disc pump process, which greatly reduces the consumption of human resources.

[0083] The present invention also proposes a fracturing pump truck, which includes a fracturing pump and a disc pump device 100. The specific structure of the fracturing pump truck refers to the above-mentioned embodiment. Since the fracturing pump truck adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0084] The driving member 11 of the disc pump device 100 can be directly powered by the power supply of the fracturing pump truck, without the need to set up an additional energy device.

[0085] In summary, a disc pump device 100 and a fracturing pump truck provided in the embodiments of the present invention have the following beneficial effects: the disc pump device 100 drives the transmission shaft 200 to rotate through the friction force between the friction wheel 13 and the first friction member 2, thereby achieving the purpose of deceleration, causing the transmission shaft 200 to rotate slowly, thereby facilitating the staff to clearly observe the movement state and position of the fracturing pump plunger. When the plunger is observed to have moved to a position that the staff considers to be most convenient for disassembly, the disc pump device 100 can be shut down in time without the need for the staff to manually operate the disc pump, thereby reducing manpower consumption.

[0086] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A disc pump device, characterized in that: The disc pump device (100) is used to perform disc pumping on a fracturing pump, the fracturing pump is connected to a driving mechanism via a transmission shaft (200), and the driving mechanism is used to drive the transmission shaft (200) to rotate, so as to drive the fracturing pump to operate via the transmission shaft (200); The disc pump device (100) comprises: A disc pump assembly (1), the disc pump assembly (1) comprising a driving member (11) and a friction wheel (13), the friction wheel (13) being connected to an output shaft (12) of the driving member (11); A first friction member (2), wherein the first friction member (2) is arranged on the transmission shaft (200); The driving member (11) is used to drive the friction wheel (13) to rotate via the output shaft (12); when the friction wheel (13) rotates, it comes into frictional contact with the first friction member (2), so that the first friction member (2) drives the transmission shaft (200) to rotate.

2. The disc pump device according to claim 1, characterized in that The friction wheel (13) is in intermittent frictional contact with the first friction member (2) when rotating.

3. The disc pump device according to claim 2, characterized in that The friction wheel (13) comprises: A wheel disc (131), wherein the wheel disc (131) is connected to an output shaft (12) of the driving member (11); a second friction member (132), wherein the second friction member (132) is arranged on the wheel disc (131); The driving member (11) is used to drive the wheel disc (131) to rotate via the output shaft (12), thereby driving the second friction member (132) to rotate; when the second friction member (132) rotates, it is in intermittent friction contact with the first friction member (2).

4. The disc pump device according to claim 3, characterized in that The first friction member (2) is a first friction ring (2a) sleeved on the outer edge of the transmission shaft (200), and the second friction member (132) is a second friction ring (132a) sleeved on the outer edge of the wheel disc (131), and when the second friction ring (132a) rotates, its outer edge is in intermittent friction contact with the outer edge of the first friction ring (2a).

5. The disc pump device according to claim 4, characterized in that The outer edge of the second friction ring (132a) comprises a friction portion (1321) and a non-friction portion (1322) connected end to end along its circumferential direction, and a gap is provided between the non-friction portion (1322) and the first friction ring when the second friction ring (132a) rotates, so that the friction portion (1321) is in intermittent friction contact with the first friction ring (132a) when the second friction ring (132a) rotates; or, The outer edge of the second friction ring (132a) includes a plurality of non-friction parts (1322) and a plurality of friction parts (1321) alternately arranged along its circumference, and each of the non-friction parts (1322) has a gap with the first friction ring when the second friction ring (132a) rotates, so that the plurality of friction parts (1321) are in alternate frictional contact with the first friction ring (2a) when the second friction ring (132a) rotates.

6. The disc pump device according to claim 5, characterized in that: The wheel disc (131) is a circular disc, the wheel disc (131) is arranged concentrically with the output shaft (12), and the thickness of the friction portion (1321) is greater than the thickness of the non-friction portion (1322); Alternatively, the wheel disc (131) is a circular disc, the wheel disc (131) and the output shaft (12) are eccentrically arranged, and the thickness of the friction portion (1321) is equal to the thickness of the non-friction portion (1322); Alternatively, the wheel disc (131) is a cam (131a), the cam (131a) is arranged concentrically with the output shaft (12), and the thickness of the friction portion (1321) is equal to the thickness of the non-friction portion (1322).

7. The disc pump device according to claim 5, characterized in that A counterweight (14) is also provided on the wheel disc (131); the counterweight (14) is embedded in the wheel disc (131), or the counterweight (14) is provided on at least one side of the wheel disc (131); The counterweight (14) is used to separate the friction portion (1321) from the first friction ring (2a) when the second friction ring (132a) is not rotating.

8. The disc pump device according to claim 4, characterized in that The first friction ring (2a) is an annular closed structure sleeved on the outer edge of the transmission shaft (200).

9. The disc pump device according to claim 4, characterized in that The first friction ring (2a) and the second friction ring (132a) are both friction rubber rings.

10. A fracturing pump truck, characterized in that: The invention comprises a fracturing pump and a disc pump device (100) according to any one of claims 1 to 9.

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