WO2022110892A2

WO2022110892A2 - Split-body scraper pump capable of aiding motor operation

Info

Publication number: WO2022110892A2
Application number: PCT/CN2021/111183
Authority: WO
Inventors: 吉文斌; 黄萧; 陈跃邦; 李传金; 徐军中
Original assignee: 江苏金湖输油泵有限公司
Priority date: 2021-08-03
Filing date: 2021-08-06
Publication date: 2022-06-02
Also published as: ZA202202614B; WO2022110892A3; CN113819055A; LU502355B1

Abstract

The present invention relates to the technical field of split-body scraper pumps. Disclosed is a split-body scraper pump capable of aiding motor operation, and comprising a first pump body, a second pump body, a mounting plate, and a motor. The motor is connected to the mounting plate, the first pump body is connected to the second pump body, a transmission mechanism is provided between the first pump body and the second pump body, outer walls of the first pump body and of the second pump body are provided with a protection mechanism and a clamping mechanism, and the first pump body and the second pump body form a main pump body. The transmission mechanism comprises a shaft, an oil outlet, an oil inlet, a mounting block, pump vanes, clamping blocks, a sliding cavity and a sealing strip. By means of the split-body scraper pump capable of aiding motor operation provided in the present invention, a liquid can be transmitted, and compared with a common scraper pump, the scraper pump provided in the present invention has such advantages as being able to replace the vanes that are in the interior, being able to facilitate daily disassembly and maintenance of the scraper pump, and also being able to protect the interior, preventing the internal pressure from becoming too great.

Description

A split scraper pump capable of assisting motor operation

technical field

The invention relates to the technical field of split scraper pumps, in particular to a split scraper pump capable of assisting the operation of a motor.

Background technique

The scraper pump is a pump in which the vanes in the rotor groove are in contact with the pump casing (stator ring), and the suctioned liquid is pressed from the oil inlet side to the oil discharge side. When the rotor of the scraper pump rotates, under the action of centrifugal force and pressure oil, the tip of the blade is close to the inner surface of the stator. In this way, the working volume formed by the two blades and the inner surface of the rotor and the stator first absorbs oil from small to large, and then discharges oil from large to small. When the blades rotate once, oil absorption and oil discharge are completed once.

After the existing scraper pump is in use, it is inconvenient to replace the blades inside the scraper pump, and it takes a lot of tedious time to disassemble and assemble during daily maintenance, which affects the normal use efficiency of the scraper pump, and During the use of the scraper pump, the internal liquid cannot be observed, and it is not easy to observe after the internal liquid changes.

SUMMARY OF THE INVENTION

(1) Technical problems solved

Aiming at the deficiencies of the prior art, the present invention provides a split scraper pump capable of assisting the operation of the motor. It is used for protection to avoid excessive internal pressure, and can use the power of oil to generate electricity. Maintenance requires a lot of tedious time to disassemble and assemble, which affects the normal use efficiency of the scraper pump, and the interior cannot be protected during the use of the scraper pump, and the internal pressure is too high, resulting in damage to parts.

(2) Technical solutions

The present invention provides the following technical solutions: a split scraper pump capable of assisting the operation of a motor, comprising a first pump body, a second pump body, a mounting plate and a motor, wherein the motor is connected to the mounting plate, and the first pump body is connected to the mounting plate. The pump body is connected with the second pump body, there is a transmission mechanism between the first pump body and the second pump body, the outer walls of the first pump body and the second pump body have a protection mechanism and a clamping mechanism, and the first pump body and the second pump body have a protection mechanism and a clamping mechanism. The first pump body and the second pump body form the main pump body.

The split scraper pump provided by the present invention that can assist the operation of the motor can transmit the liquid, and compared with the ordinary scraper pump, the scraper pump provided by the present invention has the ability to replace the internal vanes. , and can facilitate the daily disassembly and maintenance of the scraper pump, can also protect the interior, avoid excessive internal pressure, and can use the power of oil to generate electricity, etc. , it is inconvenient to replace the blades inside the scraper pump, and it takes a lot of tedious time to disassemble and assemble during daily maintenance, which affects the normal use efficiency of the scraper pump, and cannot be used during the use of the scraper pump. Protect the parts from damage due to excessive internal pressure.

In a possible implementation manner, the transmission mechanism includes a rotating shaft, an oil outlet, an oil inlet, a mounting block, a pump blade, a clamping block, a chute and a sealing strip, and the rotating shaft penetrates through the second pump body and It is connected with the second pump body and the first pump body, the oil outlet and the oil inlet are connected with the main pump body, the chute is opened in the second pump body, and the installation block is located in the main pump body. The chute is connected with the second pump body and the first pump body, the clamping block is connected with the pump blade, the clamping block is connected with the mounting block, and the sealing sleeve is connected with the first pump body. A pump body is connected with the second pump body.

By setting the transmission mechanism, the liquid in the pump body can be easily transmitted, and the internal blades can be easily replaced, so that the internal liquid can be transmitted according to different blades, thereby ensuring the stable use of the scraper pump, and further To avoid the backflow of the internal liquid caused by the reversal of the motor, it can ensure the stable transmission of the liquid under the action of the impeller pump.

In a possible implementation manner, the rotating shaft can rotate relative to the first pump body and the second pump body.

In a possible implementation, the mounting block has a limit groove, the pump vane is located in the limit groove and is in contact with the mounting block, and the pump vane can move relative to the mounting block , the first pump body and the second pump body are provided with installation grooves, and the sealing strip is located in the installation groove and is in contact with the first pump body and the second pump body.

By setting the limit groove, the clamping block can be easily fixed, so that the scraper pump can be replaced and clamped, and the internal pump blade can be replaced easily.

In a possible implementation manner, the shape of the pump blade is a quadrangle or a triangle.

By setting the shape of the pump vane as a quadrangle, it is convenient to transmit the liquid, and when the motor does not rotate, the liquid is in a state of no flow.

By setting the shape of the pump blade as a triangle, the flow of the liquid can be ensured at all times, and the flow of the liquid can be accelerated during the process of starting the motor, thereby ensuring the fast flow of the liquid.

In a possible implementation, the protection mechanism includes an oil inlet pipe, a safety valve, an on-off valve and an oil outlet pipe, the oil inlet pipe is connected to the oil inlet port, the safety valve is connected to the oil inlet pipe, so The on-off valve is connected with the safety valve, and the oil outlet pipe is connected with the oil outlet.

By setting the protection mechanism, it is convenient to detect and judge the pressure of the liquid transmitted inside the pump body, so as to ensure the stability of the transmission liquid inside the pump body, and then to protect the internal components to ensure that the internal liquid pressure will not be too high. Further, it can ensure the stable operation inside the pump.

In a possible implementation manner, the oil inlet pipe is communicated with the oil inlet port, the oil outlet pipe is communicated with the oil outlet port, the oil inlet pipe, the safety valve, the switch valve and the oil outlet pipe are communicated and arranged, and The safety valve can adjust the safety pressure.

By setting the safety valve, when the internal pressure exceeds a predetermined value, the oil inlet pipe and the oil outlet pipe can be communicated, so that the pressure relief can be facilitated and the pump body can be protected.

In a possible implementation manner, the clamping mechanism includes a first fixing plate, a second fixing plate, a limit rod, a connecting frame and a limit block, and the first fixing plate is connected to the first pump body , the second fixing plate is connected with the second pump body, the limiting rod is connected with the first fixing plate and the second fixing plate, the connecting frame is connected with the limiting block, and the The limit block is connected with the limit rod.

By setting the clamping mechanism, the first pump body and the second pump body can be easily fixed, so that the first pump body and the second pump body can be disassembled and assembled quickly, so as to facilitate the daily maintenance of the scraper pump and the internal pump blades It can also clamp the seal between the first pump body and the second pump body, and further ensure the normal operation of the scraper pump.

In a possible implementation, the limit rod is provided with a slot, the limit block is engaged with the slot, and the limit rod can be fixed relative to the first fixing plate and the second board moves.

The first fixing plate and the second fixing plate can be restricted by setting the limit rod, so that the connection between the first pump body and the second pump body can be ensured, and the stability during the liquid transmission process can be ensured.

In a possible implementation, the power mechanism includes a rotor, a plunger and a connecting plate, the rotor is located in the motor and is connected with the rotating shaft, the plunger is located in the rotor, and the A plunger is movable relative to the rotor, and the connecting plate is connected to the plunger.

By setting the power mechanism, it is convenient for the motor to rotate while driving the pump blades to rotate, so as to convert the power of the motor into the power of the pump blades, and when the plunger reaches the most extreme position, the internal liquid can push the rotor to generate electricity, thereby reducing the power of the motor. power loss.

Compared with the prior art, the present invention provides a split scraper pump capable of assisting the operation of the motor, and has the following beneficial effects:

1. The present invention can facilitate the transmission of the liquid in the pump body by setting the transmission mechanism, and can facilitate the replacement of the internal blades, so that the internal liquid can be transmitted according to different blades, thereby ensuring the stable use of the scraper pump. , which can further avoid the backflow of the internal liquid caused by the reversal of the motor, so as to ensure the stable transmission of the liquid under the action of the impeller pump.

2. The present invention can conveniently detect and judge the pressure of the liquid transmitted inside the pump body by setting the protection mechanism, so as to ensure the stability of the transmission liquid inside the pump body, and then can protect the internal components to ensure that the internal liquid pressure is not stable. It will be too high, which can further ensure the stable operation inside the pump.

3. The present invention can easily fix the first pump body and the second pump body by setting the clamping mechanism, so that the first pump body and the second pump body can be disassembled and assembled quickly, so as to facilitate the daily maintenance of the scraper pump And the replacement of the internal pump blades, and the seal between the first pump body and the second pump body can be clamped, which further ensures the normal operation of the scraper pump.

It is to be understood that the foregoing general description and the following detailed description are exemplary only and do not limit the invention.

Description of drawings

1 is a schematic diagram of the overall structure of a split scraper pump capable of assisting the operation of a motor provided by the present invention;

2 is a rear view of a split scraper pump capable of assisting the operation of a motor provided by the present invention;

3 is a schematic diagram of the internal structure of a motor of a split scraper pump capable of assisting the operation of the motor provided by the present invention;

4 is a schematic diagram of a transmission mechanism of a split scraper pump capable of assisting the operation of a motor provided by the present invention;

5 is a schematic diagram of a pump blade of a split scraper pump capable of assisting the operation of a motor provided by the present invention;

FIG. 6 is a schematic structural diagram of the position of the limit rod of a split scraper pump capable of assisting the operation of the motor provided by the present invention.

Among them: 1 first pump body, 2 second pump body, 4 motor, 21 shaft, 22 oil outlet, 23 oil inlet, 24 mounting block, 25 pump blade, 26 clamping block, 27 chute, 28 sealing strip, 31 oil inlet pipe, 32 safety valve, 33 switch valve, 34 oil outlet pipe, 41 first fixing plate, 42 second fixing plate, 43 limit rod, 44 connection frame, 45 limit block, 51 rotor, 52 plunger, 53 connection board.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

Examples of such embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated devices or elements. It must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Example 1:

As shown in Figures 1-5 and 7, the present invention provides a split scraper pump capable of assisting the operation of the motor, comprising a first pump body 1, a second pump body 2, a mounting plate 3 and a motor 4, the motor 4 Connected with the mounting plate 3, the first pump body 1 is connected with the second pump body 2, there is a transmission mechanism between the first pump body 1 and the second pump body 2, and the outer walls of the first pump body 1 and the second pump body 2 have The protection mechanism and the clamping mechanism, the first pump body 1 and the second pump body 2 form the main pump body.

The split scraper pump provided by the present invention that can assist the operation of the motor can transmit the liquid, and compared with the ordinary scraper pump, the scraper pump provided by the present invention has the ability to replace the internal vanes. , and can facilitate the daily disassembly and maintenance of the scraper pump, and can also protect the interior to avoid the advantages of excessive internal pressure, which solves the problem of inconvenience to the blades inside the scraper pump after the process of use in the prior art. Replacement, and it takes a lot of tedious time to disassemble and assemble during daily maintenance, which affects the normal use efficiency of the scraper pump, and the interior cannot be protected during the use of the scraper pump, and the internal pressure is too high, resulting in damage to parts .

In a possible implementation, the transmission mechanism includes a rotating shaft 21 , an oil outlet 22 , an oil inlet 23 , a mounting block 24 , a pump blade 25 , a clamping block 26 , a chute 27 and a sealing strip 28 , and the rotating shaft 21 penetrates through the second The pump body 2 is connected with the second pump body 2 and the first pump body 1, the oil outlet 22 and the oil inlet 23 are connected with the main pump body, the chute 27 is opened in the second pump body 2, and the mounting block 24 is located in the slide. The groove 27 is connected with the second pump body 2 and the first pump body 1, the clamping block 26 is connected with the pump blade 25, the clamping block 26 is connected with the mounting block 24, and the sealing sleeve is connected with the first pump body 1 and the second pump body 2. connect.

By setting the transmission mechanism, the liquid in the pump body can be easily transmitted, and the internal blades can be easily replaced, so that the internal liquid can be transmitted according to different blades, thereby ensuring the stable use of the scraper pump, and further Avoid the reverse rotation of the motor 4 to cause the internal liquid to flow back, so as to ensure the stable transmission of the liquid under the action of the impeller pump.

In a possible implementation manner, the rotating shaft 21 can rotate relative to the first pump body 1 and the second pump body 2 .

In a possible embodiment, the mounting block 24 has a limit groove, the pump vane 25 is located in the limit groove and is in contact with the mounting block 24, and the pump vane 25 can move relative to the mounting block 24, the first pump body 1 and Each of the second pump bodies 2 is provided with an installation groove, and the sealing strip 28 is located in the installation groove and is in contact with the first pump body 1 and the second pump body 2 .

The clamping block 26 can be easily fixed by providing the limit groove, so that the scraper pump can be replaced and clamped, so that the internal pump vane 25 can be easily replaced.

In a possible embodiment, the shape of the pump vane 25 is a quadrilateral.

By setting the shape of the pump vane 25 as a quadrangle, it is convenient to transmit the liquid, and when the motor 4 does not rotate, the liquid is in a state of no flow.

In a possible implementation, the protection mechanism includes an oil inlet pipe 31 , a safety valve 32 , a switch valve 33 and an oil outlet pipe 34 , the oil inlet pipe 31 is connected to the oil inlet 23 , the safety valve 32 is connected to the oil inlet pipe 31 , and the switch valve 33 It is connected to the safety valve 32 , and the oil outlet pipe 34 is connected to the oil outlet 22 .

In a possible embodiment, the oil inlet pipe 31 is communicated with the oil inlet 23, the oil outlet pipe 34 is communicated with the oil outlet 22, the oil inlet pipe 31, the safety valve 32, the switch valve 33 and the oil outlet pipe 34 are communicated and arranged, and the safety valve 32 is able to adjust the safety pressure.

By arranging the safety valve 32 , when the internal pressure exceeds a predetermined value, the oil inlet pipe 31 and the oil outlet pipe 34 can be communicated, so that pressure relief can be facilitated and the pump body can be protected.

In a possible embodiment, the clamping mechanism includes a first fixing plate 41 , a second fixing plate 42 , a limit rod 43 , a connecting frame 44 and a limit block 45 , the first fixing plate 41 and the first pump body 1 connection, the second fixing plate 42 is connected with the second pump body 2, the limit rod 43 is connected with the first fixing plate 41 and the second fixing plate 42, the connecting frame 44 is connected with the limit block 45, and the limit block 45 is connected with the limit The bit rod 43 is connected.

By setting the clamping mechanism, the first pump body 1 and the second pump body 2 can be easily fixed, so that the first pump body 1 and the second pump body 2 can be disassembled and assembled quickly, so as to facilitate the daily maintenance of the scraper pump And the replacement of the internal pump blade 25, and the seal between the first pump body 1 and the second pump body 2 can be clamped, which further ensures the normal operation of the scraper pump.

In a possible implementation, the limit rod 43 is provided with a slot, the limit block 45 is engaged with the slot, and the limit rod 43 can move relative to the first fixing plate 41 and the second fixing plate 42 .

The first fixing plate 41 and the second fixing plate 42 can be restricted by setting the limit rod 43 , so as to ensure the connection between the first pump body 1 and the second pump body 2 , thereby ensuring the stability during the liquid transmission process.

The power mechanism includes a rotor 51, a plunger 52 and a connecting plate 53. The rotor 51 is located in the motor 4 and connected to the rotating shaft 21. The plunger 52 is located in the rotor 51, and the plunger 52 can move relative to the rotor 51. The connecting plate 53 is connected to the column. Plug 52 is connected.

By setting the power mechanism, it is convenient to rotate the motor 4 while driving the pump blade 25 to rotate, so as to convert the power of the motor 4 into the power of the pump blade 25, and when the plunger 52 reaches the most extreme position, the internal liquid can push the rotor 51 to move. Electricity is generated, thereby reducing the power loss of the motor 4 .

Embodiment 2:

As shown in Figures 1-4 and 6-7, the present invention provides a split scraper pump capable of assisting the operation of the motor, comprising a first pump body 1, a second pump body 2, a mounting plate 3 and a motor 4, The motor 4 is connected with the mounting plate 3 , the first pump body 1 is connected with the second pump body 2 , there is a transmission mechanism between the first pump body 1 and the second pump body 2 , the first pump body 1 and the second pump body 2 are connected. The outer wall has a protection mechanism and a clamping mechanism, and the first pump body 1 and the second pump body 2 form the main pump body.

In a possible embodiment, the shape of the pump vanes 25 is triangular.

By setting the shape of the pump blade 25 to be a triangle, the flow of the liquid can be ensured at all times, and the flow of the liquid can be accelerated during the process of starting the motor 4, thereby ensuring the rapid flow of the liquid.

In addition, the present invention also provides the working principle of a split scraper pump that can assist the operation of the motor. When in use, the rotation of the motor 4 drives the rotation of the shaft 21, the rotation of the shaft 21 drives the rotor 51 to rotate, and the rotor 51 drives the plunger 52 to rotate. , while the motor 4 rotates, the pump blade 25 is driven to rotate, and the liquid is pumped into the motor 4. After the liquid enters the motor 4, the plunger 52 is pushed to move. When the plunger 52 moves to the limit position, the oil pushes the pump blade 25 to rotate. , so as to assist in driving the rotor 51 to rotate to generate electricity, thereby saving the power lost by the motor 4 . When the motor 4 rotates, the pump blade 25 is driven to rotate, and the liquid is transmitted, so that the liquid is transmitted from the oil inlet 23 to the oil outlet 22. During the use of the scraper pump, the liquid will enter the safety valve from the oil inlet pipe 31. In 32, due to the preset pressure of the safety valve 32, when the internal liquid exceeds the predetermined pressure, the liquid will flow from the oil outlet pipe 34 to the oil outlet 22 after opening the switch valve 33. When disassembling, remove the first pump body 1 After clamping with the second pump body 2 and pulling out the limiting block 45, the first pump body 1 and the second pump body 2 are separated, thereby facilitating the replacement and maintenance of the pump vanes 25 inside.

Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, Alternatives and modifications, the scope of the invention is defined by the appended claims and their equivalents.

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

The technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

A split scraper pump capable of assisting the operation of a motor, comprising a first pump body (1), a second pump body (2), a mounting plate (3) and a motor (4), characterized in that: the motor (4) ) is connected to the mounting plate (3), the first pump body (1) is connected to the second pump body (2), and the first pump body (1) and the second pump body (2) have a Transmission mechanism and power mechanism, the outer walls of the first pump body (1) and the second pump body (2) have a protection mechanism and a clamping mechanism, the first pump body (1) and the second pump body (2) Form the main pump body.
A split scraper pump capable of assisting the operation of a motor according to claim 1, characterized in that: the transmission mechanism comprises a rotating shaft (21), an oil outlet (22), an oil inlet (23), and a mounting block (24), pump vane (25), clamping block (26), chute (27) and sealing strip (28), the rotating shaft (21) penetrates the second pump body (2) and is connected with the second pump body (2) The pump body (2) is connected with the first pump body (1), the oil outlet (22) and the oil inlet (23) are both connected with the main pump body, and the chute (27) is opened in the In the second pump body (2), the mounting block (24) is located in the chute (27) and is connected with the second pump body (2) and the first pump body (1), and the clamping block ( 26) is connected with the pump blade (25), the clamping block (26) is connected with the mounting block (24), and the sealing sleeve is connected with the first pump body (1) and the second pump body (2) )connect.
A split scraper pump capable of assisting the operation of a motor according to claim 2, characterized in that: the rotating shaft (21) can be relative to the first pump body (1) and the second pump body (2) turn.
The split scraper pump capable of assisting the operation of a motor according to claim 2, characterized in that: the mounting block (24) has a limit groove, and the pump blade (25) is located in the limit groove and contact with the mounting block (24), and the pump blade (25) can move relative to the mounting block (24), the first pump body (1) and the second pump body (2) are both open There is an installation groove, and the sealing strip (28) is located in the installation groove and is in contact with the first pump body (1) and the second pump body (2).
The split scraper pump capable of assisting the operation of the motor according to claim 2, wherein the shape of the pump blade (25) is a quadrangle or a triangle.
A split scraper pump capable of assisting the operation of a motor according to claim 2, wherein the protection mechanism comprises an oil inlet pipe (31), a safety valve (32), an on-off valve (33) and an oil outlet pipe (31). 34), the oil inlet pipe (31) is connected with the oil inlet (23), the safety valve (32) is connected with the oil inlet pipe (31), and the switch valve (33) is connected with the safety valve (32) is connected, and the oil outlet pipe (34) is connected with the oil outlet (22).
The split scraper pump capable of assisting the operation of a motor according to claim 6, wherein the oil inlet pipe (31) is communicated with the oil inlet (23), and the oil outlet pipe (34) is connected to the oil inlet (23). The oil outlet (22) is communicated, the oil inlet pipe (31), the safety valve (32), the switch valve (33) and the oil outlet pipe (34) are communicated and arranged, and the safety valve (32) can adjust the safety pressure .
A split scraper pump capable of assisting the operation of a motor according to claim 1, characterized in that: the clamping mechanism comprises a first fixing plate (41), a second fixing plate (42), a limit rod ( 43), a connecting frame (44) and a limit block (45), the first fixing plate (41) is connected with the first pump body (1), and the second fixing plate (42) is connected with the first pump body (1). The two pump bodies (2) are connected, the limit rod (43) is connected with the first fixing plate (41) and the second fixing plate (42), and the connecting frame (44) is connected with the limit block ( 45) is connected, and the limit block (45) is connected with the limit rod (43).
A split scraper pump capable of assisting the operation of a motor according to claim 8, characterized in that: the limit rod (43) is provided with a slot, and the limit block (45) is connected to the slot. By clamping, the limiting rod (43) can move relative to the first fixing plate (41) and the second fixing plate (42).
A split scraper pump capable of assisting the operation of a motor according to claim 2, characterized in that: the power mechanism comprises a rotor (51), a plunger (52) and a connecting plate (53), the rotor ( 51) is located in the motor (4) and is connected with the rotating shaft (21), the plunger (52) is located in the rotor (51), and the plunger (52) can be relative to the rotor (51) moves, and the connecting plate (53) is connected with the plunger (52).