阅读说明：本技术 一种用于潜水轴流电泵运行时的防转装置 (Rotation preventing device used in running of submersible axial flow electric pump ) 是由 钱凤辉 舒雪辉 张帅 汪小峰 宋飞 于 2021-01-20 设计创作，主要内容包括：本发明公开了一种用于潜水轴流电泵运行时的防转装置,包括井筒、轴流潜水电泵、挡板、防转块和环形板,所述轴流潜水电泵的一端外侧套设有井筒,所述井筒底端焊接固定有环形板,且环形板与轴流潜水电泵相配合；所述井筒内壁等距固定有挡板,所述井筒内部设置有防转块,且防转块位于两个等距设置的挡板之间,所述防转块底部固定有安装板,所述安装板通过紧固件与轴流潜水电泵固定连接,所述挡板的个数为两个,且两个挡板之间为度,本发明通过防转块的设置,使得轴流潜水电泵工作时防转块在两个挡板之间来回转动,限制轴流潜水电泵的转动角度,增加安全性,使得潜水泵故障率降低,减少损失。(The invention discloses an anti-rotation device used when a submersible axial flow electric pump runs, which comprises a shaft, an axial flow submersible electric pump, a baffle plate, an anti-rotation block and an annular plate, wherein the shaft is sleeved outside one end of the axial flow submersible electric pump, the annular plate is welded and fixed at the bottom end of the shaft, and the annular plate is matched with the axial flow submersible electric pump; the anti-rotation axial-flow submersible electric pump is characterized in that baffles are fixed on the inner wall of the shaft at equal intervals, anti-rotation blocks are arranged in the shaft and located between two baffles which are arranged at equal intervals, a mounting plate is fixed at the bottom of each anti-rotation block, the mounting plate is fixedly connected with the axial-flow submersible electric pump through a fastener, the number of the baffles is two, and the distance between the two baffles is equal.)

1. An anti-rotation device used when a submersible axial flow electric pump operates is characterized in that: the anti-rotation device comprises a shaft (1), an axial flow submersible electric pump (2), a baffle (3), an anti-rotation block (4) and an annular plate (5), wherein the shaft (1) is sleeved outside one end of the axial flow submersible electric pump (2), the annular plate (5) is fixedly welded at the bottom end of the shaft (1), and the annular plate (5) is matched with the axial flow submersible electric pump (2);

baffles (3) are fixed on the inner wall of the shaft (1) at equal intervals, anti-rotation blocks (4) are arranged in the shaft (1), the anti-rotation blocks (4) are positioned between the two baffles (3) arranged at equal intervals, and a mounting plate (10) is fixed at the bottom of each anti-rotation block (4);

the mounting plate (10) is fixedly connected with the axial flow submersible electric pump (2) through a fastener.

2. An anti-rotation device for running of an electric submersible axial flow pump according to claim 1, characterized in that the number of said baffles (3) is two and the angle between two baffles (3) is 120 °.

3. An anti-rotation device during the operation of an axial-flow submersible electric pump according to claim 1, characterized in that the axial-flow submersible electric pump (2) is externally sheathed with an annular rubber pad (19).

4. The anti-rotation device for the running of the submersible axial flow electric pump according to claim 1, wherein the fastener comprises a fixed rod (9), a sliding rod (18) and a limit block (16), the fixed rod (9) is arranged at the top of the mounting plate (10), a mounting groove is formed in the side wall of the axial flow submersible electric pump (2), the bottom end of the fixed rod (9) penetrates through the mounting plate (10) to be arranged in the mounting groove, and a pulling groove (8) is formed in the top of the fixed rod (9);

a sliding rod (18) is connected to the inside of the fixing rod (9) in a sliding manner, and the top end of the sliding rod (18) penetrates through the side wall of the fixing rod (9) and is arranged in the pulling groove (8);

limiting grooves (13) are symmetrically formed in two sides of the bottom end of the fixing rod (9), limiting blocks (16) are connected in the limiting grooves (13) in a sliding mode, connecting rods (14) are arranged in the limiting grooves (13), two ends of each connecting rod (14) are respectively connected with the limiting blocks (16) and the sliding rods (18) in a rotating mode through hinges, limiting springs (12) are arranged in the limiting blocks (16), and two ends of each limiting spring (12) are respectively fixedly connected with the fixing rod (9) and the limiting blocks (16);

clamping grooves (17) are symmetrically formed in two sides of the mounting groove, and one end, far away from the limiting spring (12), of the limiting block (16) is arranged in the clamping grooves (17).

5. An anti-rotation device for running of a submersible axial flow electric pump according to claim 4, characterized in that a pull ring (6) is arranged inside the pulling groove (8), the top end of the slide rod (18) penetrates through the side wall of the fixing rod (9) and is fixedly connected with the pull ring (6), a cover plate (7) is arranged at the top of the pulling groove (8), and the cover plate (7) is engaged and connected with the pulling groove (8) through threads.

6. An anti-rotation device for running of a submersible axial flow electric pump according to claim 4, characterized in that the limiting groove (13) is symmetrically fixed with the stabilizing block (11), the two ends of the limiting block (16) are symmetrically provided with the stabilizing grooves (15), and the stabilizing block (11) is slidably connected in the stabilizing grooves (15).

7. The rotation preventing device for the running of the submersible axial flow electric pump according to claim 1, characterized in that placing grooves (21) are symmetrically formed in two sides of the axial flow submersible electric pump (2), connecting blocks (23) are slidably connected in the placing grooves (21), a telescopic spring (20) is arranged in the placing grooves (21), and two ends of the telescopic spring (20) are respectively and fixedly connected with the connecting blocks (23) and the axial flow submersible electric pump (2);

the inner wall of the annular plate (5) is symmetrically provided with connecting grooves (28), the connecting grooves (28) are arranged in an arc shape, one ends, far away from the telescopic springs (20), of the connecting blocks (23) are arranged in the connecting grooves (28), pushing plates (27) are connected in the connecting grooves (28) in a sliding mode, adjusting rods (24) are arranged in the connecting grooves (28), and one ends of the adjusting rods (24) are rotatably connected with the pushing plates (27) through hinges;

adjustment groove (26) have been seted up to annular plate (5) outside symmetry, sliding connection has regulating block (25) in adjustment groove (26), adjust pole (24) and keep away from the one end of slurcam (27) and pass through hinge and regulating block (25) and rotate and be connected.

8. An anti-rotation device used when an axial-flow submersible electric pump operates according to claim 7, characterized in that a limiting plate (22) is connected in the placing groove (21) in a sliding manner, the limiting plate (22) is fixedly connected with the connecting block (23), and two ends of the expansion spring (20) are respectively fixedly connected with the limiting plate (22) and the axial-flow submersible electric pump (2).

9. The anti-rotation device for the running of the submersible axial flow electric pump according to claim 1, characterized in that the specific use method of the anti-rotation device for the running of the submersible axial flow electric pump comprises the following steps:

the method comprises the following steps: the rotation preventing block (4) is placed on the axial flow submersible electric pump (2), a cover plate (7) at the top of a fixing rod (9) is opened, a pull ring (6) is pulled upwards, the pull ring (6) drives a slide rod (18) to move upwards, the slide rod (18) drives a connecting rod (14) to move, the two ends of the connecting rod (14) are respectively rotatably connected with the slide rod (18) and a limiting block (16), the connecting rod (14) moves and simultaneously drives the limiting block (16) to move towards a limiting groove (13), a limiting spring (12) is compressed, the fixing rod (9) is pushed, the bottom end of the fixing rod (9) is arranged in an installation groove, the pulling force on the pull ring (6) is released, the limiting block (16) moves towards a clamping groove (17) under the elastic force of the limiting spring (12), and limiting is formed between the limiting block (16) and;

step two: the shaft (1) is sleeved on the outer side of the axial flow submersible electric pump (2), the annular plate (5) fixed at one end of the shaft (1) extrudes the connecting block (23), the connecting block (23) moves like the placing groove (21), the connecting block (23) extrudes the telescopic spring (20), the telescopic spring (20) is stressed and deformed, when the connecting block (23) moves to be opposite to the connecting groove (28), the connecting block (23) moves towards the connecting groove (28) under the elastic force action of the telescopic spring (20), and a limit is formed between the connecting block (23) and the connecting groove (28);

step three: when the axial-flow submersible electric pump (2) works, the axial-flow submersible electric pump (2) rotates, because the position of the shaft (1) is fixed, the rotation prevention block (4) rotates along with the axial-flow submersible electric pump (2), when the rotation prevention block (4) rotates to a certain angle, the rotation prevention block collides with the baffle (3), and the baffle (3) limits the rotation angle of the axial-flow submersible electric pump (2);

step four: when the shaft (1) needs to be disassembled, the adjusting block (25) is pushed, the adjusting block (25) moves in the adjusting groove (26), the length of the adjusting rod (24) is unchanged, the two ends of the adjusting rod (24) are rotationally connected with the adjusting block (25) and the pushing plate (27), when the position of the adjusting block (25) is changed, the adjusting rod (24) rotates and meanwhile drives the pushing plate (27) to move towards the direction of the connecting block (23), the pushing plate (27) pushes the connecting block (23) to move towards the placing groove (21), and therefore limiting is relieved, and the shaft (1) is disassembled.

Technical Field

The invention relates to an anti-rotation device, in particular to an anti-rotation device used when a submersible axial flow electric pump operates, and belongs to the technical field of application of submersible axial flow electric pumps.

Background

Many of the dive axial-flow pumps on the existing market do not have anti-rotation devices when installed in a shaft, and when the field electric pump is started, the electric pump rotates in the shaft, so that the cable is twisted and broken due to rotation. The disadvantage is that the rotation of the electric pump during operation causes the cable to be twisted off, resulting in economic loss.

Disclosure of Invention

The invention aims to provide an anti-rotation device for running of a submersible axial flow electric pump, which drives a connecting rod to move through a sliding rod, so that the connecting rod drives a limiting block to move, the limiting block enters a limiting groove, a limiting spring pushes the limiting block to move after the position of a fixed rod is adjusted, so that the position of the fixed rod is fixed, a mounting plate is fixed, the problem that the anti-rotation block cannot be rapidly mounted and dismounted in the prior art is solved, the anti-rotation device is simple in structure, convenient to operate, installation time is saved, the anti-rotation block is convenient to dismount, the working efficiency is improved, the connecting block is extruded through an annular plate to enter a placing groove, a telescopic spring pushes the connecting block to enter a connecting groove, so that the position between the connecting block and the anti-rotation block is fixed, the adjusting rod is driven to move through the adjusting block, install fast and dismantle pit shaft and axial compressor submerged motor pump, solve among the prior art axial compressor submerged motor pump and the untight problem of pit shaft connection, increase the compactness that both connect simultaneously, increase the security, improve work efficiency, through the setting of preventing changeing the piece, make axial compressor submerged motor pump during operation prevent changeing the piece and make a round trip to rotate between two baffles, the turned angle of restriction axial compressor submerged motor pump, solve among the prior art axial compressor submerged motor pump during operation pivoted problem, increase the security, make the immersible pump fault rate reduce, the loss is reduced.

The purpose of the invention can be realized by the following technical scheme: an anti-rotation device used when a submersible axial flow electric pump runs comprises a shaft, the axial flow submersible electric pump, a baffle, an anti-rotation block and an annular plate, wherein the shaft is sleeved outside one end of the axial flow submersible electric pump, the annular plate is fixed at the bottom end of the shaft in a welding mode, and the annular plate is matched with the axial flow submersible electric pump;

baffles are fixed on the inner wall of the shaft at equal intervals, anti-rotation blocks are arranged in the shaft and positioned between the two baffles arranged at equal intervals, and a mounting plate is fixed at the bottom of each anti-rotation block;

the mounting plate is fixedly connected with the axial flow submersible electric pump through a fastener.

The invention has further technical improvements that: the number of the baffle plates is two, and the angle is formed between the two baffle plates.

The invention has further technical improvements that: and an annular rubber pad is sleeved on the outer side of the axial-flow submersible electric pump.

The invention has further technical improvements that: the fastener comprises a fixed rod, a sliding rod and a limiting block, the top of the mounting plate is provided with the fixed rod, the side wall of the axial-flow submersible electric pump is provided with a mounting groove, the bottom end of the fixed rod penetrates through the mounting plate and is arranged in the mounting groove, and the top of the fixed rod is provided with a pulling groove;

a sliding rod is connected inside the fixed rod in a sliding manner, and the top end of the sliding rod penetrates through the side wall of the fixed rod and is arranged in the pulling groove;

limiting grooves are symmetrically formed in two sides of the bottom end of the fixed rod, limiting blocks are connected in the limiting grooves in a sliding mode, connecting rods are arranged in the limiting grooves, two ends of each connecting rod are respectively connected with the limiting blocks and the sliding rods in a rotating mode through hinges, limiting springs are arranged in the limiting blocks, and two ends of each limiting spring are respectively fixedly connected with the fixed rod and the limiting blocks;

the mounting groove bilateral symmetry has seted up the draw-in groove, the stopper is kept away from the one end setting of spacing spring in the draw-in groove.

The invention has further technical improvements that: the pull ring is arranged in the pulling groove, the top end of the sliding rod penetrates through the side wall of the fixing rod and is fixedly connected with the pull ring, the cover plate is arranged at the top of the pulling groove, and the cover plate is meshed with the pulling groove through threads.

The invention has further technical improvements that: the limiting groove is internally and symmetrically fixed with stabilizing blocks, stabilizing grooves are symmetrically formed in two ends of the limiting block, and the stabilizing blocks are connected in the stabilizing grooves in a sliding mode.

The invention has further technical improvements that: placing grooves are symmetrically formed in two sides of the axial flow submersible electric pump, connecting blocks are connected in the placing grooves in a sliding mode, telescopic springs are arranged in the placing grooves, and two ends of each telescopic spring are fixedly connected with the connecting blocks and the axial flow submersible electric pump respectively;

the inner wall of the annular plate is symmetrically provided with connecting grooves which are arranged in an arc shape, one end of the connecting block, far away from the telescopic spring, is arranged in the connecting grooves, the connecting grooves are internally and slidably connected with a pushing plate, an adjusting rod is arranged in the connecting grooves, and one end of the adjusting rod is rotatably connected with the pushing plate through a hinge;

the adjusting groove is symmetrically formed in the outer side of the annular plate, an adjusting block is connected to the adjusting groove in a sliding mode, and one end, far away from the pushing plate, of the adjusting rod is rotatably connected with the adjusting block through a hinge.

The invention has further technical improvements that: the standing groove is connected with a limiting plate in a sliding mode, the limiting plate is fixedly connected with the connecting block, and two ends of the telescopic spring are fixedly connected with the limiting plate and the axial-flow submersible electric pump respectively.

The invention has further technical improvements that: the specific use method of the anti-rotation device for the running of the submersible axial flow electric pump comprises the following steps:

the method comprises the following steps: the anti-rotation block is placed on the axial-flow submersible electric pump, a cover plate at the top of the fixed rod is opened, the pull ring is pulled upwards, the pull ring drives the slide rod to move upwards, the slide rod drives the connecting rod to move, the two ends of the connecting rod are respectively rotatably connected with the slide rod and the limiting block, the limiting block is driven to move towards the limiting groove while the connecting rod moves, so that the limiting spring is compressed, the fixed rod is pushed, the bottom end of the fixed rod is arranged in the mounting groove, the pulling force on the pull ring is released, the limiting block moves towards the clamping groove under the elastic action of the limiting spring, and the;

step two: the shaft is sleeved outside the axial-flow submersible electric pump, an annular plate fixed at one end of the shaft extrudes the connecting block, so that the connecting block moves like a placing groove, the telescopic spring is extruded by the connecting block, the telescopic spring deforms under stress, when the connecting block moves to be opposite to the connecting groove, the connecting block moves towards the inside of the connecting groove under the elastic force action of the telescopic spring, and the limit is formed between the connecting block and the connecting groove;

step three: when the axial flow submersible electric pump works, the axial flow submersible electric pump can rotate, and because the position of the shaft is fixed, the anti-rotation block rotates along with the axial flow submersible electric pump;

step four: when needs are dismantled the pit shaft, promote the regulating block for the regulating block moves in the adjustment tank, because the length of regulating lever is unchangeable, the both ends of adjusting the pole are rotated with regulating block and slurcam and are connected, and when the position of regulating block changed, it drives the slurcam and moves towards the direction of connecting block when adjusting the pole pivoted, thereby makes the slurcam promote the connecting block and move towards the standing groove internal motion, thereby relieves spacingly, dismantles the pit shaft.

Compared with the prior art, the invention has the beneficial effects that:

1. when the invention is used, the anti-rotation block is placed on the axial flow submersible electric pump, the cover plate at the top of the fixed rod is opened, the pull ring is pulled upwards, the pull ring drives the slide rod to move upwards, the slide rod drives the connecting rod to move, the two ends of the connecting rod are respectively connected with the slide rod and the limiting block in a rotating way, the limiting block is driven to move towards the limiting groove while the connecting rod moves, so that the limiting spring is compressed, the fixed rod is pushed, the bottom end of the fixed rod is arranged in the mounting groove, the pulling force on the pull ring is released, the limiting block moves towards the clamping groove under the elastic force action of the limiting spring, the limiting block and the clamping groove form a limiting position, the connecting rod is driven to move by the slide rod, so that the limiting block is driven to move, the limiting block enters the limiting groove, simple structure, the simple operation saves installation time, is convenient for and dismantles the anti-rotating block, improves work efficiency.

2. The shaft sleeve is sleeved outside the axial flow submersible electric pump, the annular plate fixed at one end of the shaft extrudes the connecting block, the connecting block moves like a placing groove, so that the connecting block extrudes the telescopic spring, the telescopic spring is stressed and deformed, when the connecting block moves to be opposite to the connecting groove, the connecting block moves towards the inside of the connecting groove under the elastic force action of the telescopic spring, a limit is formed between the connecting block and the connecting groove, when the shaft is required to be disassembled, the adjusting block is pushed to move in the adjusting groove, because the length of the adjusting rod is unchanged, the two ends of the adjusting rod are rotationally connected with the adjusting block and the pushing plate, when the position of the adjusting block is changed, the pushing plate is driven to move towards the connecting block while the adjusting rod rotates, so that the pushing plate pushes the connecting block to move towards the placing groove, the limit is relieved, the shaft is disassembled, expansion spring promotes the connecting block and enters into the spread groove in to fixed position between the two, drive through the regulating block and adjust the pole motion, thereby promote the slurcam and relieve with the connecting block, thereby relieve the spacing of connecting block and spread groove, install fast and dismantle pit shaft and axial compressor submerged motor pump, increase the compactness that both are connected simultaneously, increase the security, improve work efficiency.

3. Rotation can take place when the axial compressor submerged motor pump during operation, because the position of pit shaft is fixed, prevent changeing the piece and rotate along with axial compressor submerged motor pump, when preventing changeing the piece and rotating certain angle, can collide the baffle, the baffle restricts axial compressor submerged motor pump's turned angle, through preventing changeing the setting of piece, make axial compressor submerged motor pump during operation prevent changeing the piece and make a round trip to rotate between two baffles, restrict axial compressor submerged motor pump's turned angle, increase the security, make the immersible pump fault rate reduce, and the loss is reduced.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of the area A of the present invention;

FIG. 3 is an enlarged structural view of the area B of the present invention.

In the figure: 1. a wellbore; 2. an axial flow submersible electric pump; 3. a baffle plate; 4. a rotation prevention block; 5. an annular plate; 6. a pull ring; 7. a cover plate; 8. pulling the groove; 9. fixing the rod; 10. mounting a plate; 11. a stabilizing block; 12. a limiting spring; 13. a limiting groove; 14. a connecting rod; 15. a stabilizing slot; 16. a limiting block; 17. a card slot; 18. a slide bar; 19. an annular rubber pad; 20. a tension spring; 21. a placement groove; 22. a limiting plate; 23. connecting blocks; 24. adjusting a rod; 25. an adjusting block; 26. an adjustment groove; 27. a push plate; 28. and connecting the grooves.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, an anti-rotation device for running of an axial-flow submersible electric pump includes a shaft 1, an axial-flow submersible electric pump 2, a baffle 3, an anti-rotation block 4, an annular plate 5, a pull ring 6, a cover plate 7, a pulling groove 8, a fixing rod 9, a mounting plate 10, a stabilizing block 11, a limiting spring 12, a limiting groove 13, a connecting rod 14, a stabilizing groove 15, a limiting block 16, a clamping groove 17, a sliding rod 18, an annular rubber pad 19, a telescopic spring 20, a placing groove 21, a limiting plate 22, a connecting block 23, an adjusting rod 24, an adjusting block 25, an adjusting groove 26, a pushing plate 27 and a connecting groove 28, wherein the shaft 1 is sleeved outside one end of the axial-flow submersible electric pump 2, an annular plate 5 is fixedly welded to the bottom end of the shaft 1, and the annular;

baffles 3 are fixed on the inner wall of the shaft 1 at equal intervals, the number of the baffles 3 is two, 120 degrees are formed between the two baffles 3, anti-rotation blocks 4 are arranged inside the shaft 1, the anti-rotation blocks 4 are located between the two baffles 3 which are arranged at equal intervals, a mounting plate 10 is fixed at the bottom of each anti-rotation block 4, and the mounting plate 10 is fixedly connected with the axial-flow submersible electric pump 2 through fasteners;

the top of the mounting plate 10 is provided with a fixing rod 9, the side wall of the axial-flow submersible electric pump 2 is provided with a mounting groove, the bottom end of the fixing rod 9 penetrates through the mounting plate 10 and is arranged in the mounting groove, the top of the fixing rod 9 is provided with a pulling groove 8, a pull ring 6 is arranged in the pulling groove 8, a sliding rod 18 is connected in the fixing rod 9 in a sliding manner, the top end of the sliding rod 18 penetrates through the side wall of the fixing rod 9 and is fixedly connected with the pull ring 6, the top of the pulling groove 8 is provided with a cover plate 7;

limiting grooves 13 are symmetrically formed in two sides of the bottom end of the fixed rod 9, limiting blocks 16 are connected in the limiting grooves 13 in a sliding mode, connecting rods 14 are arranged in the limiting grooves 13, two ends of each connecting rod 14 are respectively connected with the limiting blocks 16 and the sliding rods 18 in a rotating mode through hinges, stabilizing blocks 11 are symmetrically fixed in the limiting grooves 13, stabilizing grooves 15 are symmetrically formed in two ends of each limiting block 16, the stabilizing blocks 11 are connected in the stabilizing grooves 15 in a sliding mode, limiting springs 12 are arranged in the limiting blocks 16, and two ends of each limiting spring 12 are respectively fixedly connected with the fixed rod 9 and the limiting blocks 16;

clamping grooves 17 are symmetrically formed in two sides of the mounting groove, and one end, far away from the limiting spring 12, of the limiting block 16 is arranged in the clamping grooves 17;

placing grooves 21 are symmetrically formed in two sides of the axial flow submersible electric pump 2, a limiting plate 22 and a connecting block 23 are connected in the placing grooves 21 in a sliding mode, the limiting plate 22 is fixedly connected with the connecting block 23, an expansion spring 20 is arranged in the placing grooves 21, and two ends of the expansion spring 20 are respectively fixedly connected with the limiting plate 22 and the axial flow submersible electric pump 2;

the inner wall of the annular plate 5 is symmetrically provided with connecting grooves 28, the connecting grooves 28 are arranged in an arc shape, one end of the connecting block 23, far away from the telescopic spring 20, is arranged in the connecting grooves 28, the connecting grooves 28 are connected with a pushing plate 27 in a sliding mode, an adjusting rod 24 is arranged in the connecting grooves 28, and one end of the adjusting rod 24 is rotatably connected with the pushing plate 27 through a hinge;

the outer side of the annular plate 5 is symmetrically provided with adjusting grooves 26, adjusting blocks 25 are connected in the adjusting grooves 26 in a sliding mode, one ends, far away from pushing plates 27, of the adjusting rods 24 are rotatably connected with the adjusting blocks 25 through hinges, and annular rubber pads 19 are sleeved on the outer side of the axial-flow submersible electric pump 2.

The specific use method of the anti-rotation device for the running of the submersible axial flow electric pump comprises the following steps:

the method comprises the following steps: the rotation preventing block 4 is placed on the axial flow submersible electric pump 2, a cover plate 7 at the top of the fixed rod 9 is opened, the pull ring 6 is pulled upwards, the pull ring 6 drives the slide rod 18 to move upwards, the slide rod 18 drives the connecting rod 14 to move, and the two ends of the connecting rod 14 are respectively connected with the slide rod 18 and the limiting block 16 in a rotating mode, so that the limiting block 16 is driven to move towards the limiting groove 13 while the connecting rod 14 moves, the limiting spring 12 is compressed, the fixed rod 9 is pushed, the bottom end of the fixed rod 9 is arranged in the mounting groove, the pulling force on the pull ring 6 is released, the limiting block 16 moves towards the clamping groove 17 under the elastic force of the limiting spring 12, and limiting;

step two: the shaft 1 is sleeved outside the axial flow submersible electric pump 2, the annular plate 5 fixed at one end of the shaft 1 extrudes the connecting block 23, so that the connecting block 23 moves like the placing groove 21, the connecting block 23 extrudes the telescopic spring 20, the telescopic spring 20 deforms under stress, when the connecting block 23 moves to be opposite to the connecting groove 28, the connecting block 23 moves towards the connecting groove 28 under the elastic force action of the telescopic spring 20, and a limit is formed between the connecting block 23 and the connecting groove 28;

step three: when the axial-flow submersible electric pump 2 works, the axial-flow submersible electric pump 2 rotates, because the position of the shaft 1 is fixed, the anti-rotation block 4 rotates along with the axial-flow submersible electric pump 2, when the anti-rotation block 4 rotates to a certain angle, the anti-rotation block collides with the baffle 3, and the baffle 3 limits the rotation angle of the axial-flow submersible electric pump 2;

step four: when the shaft 1 needs to be disassembled, the adjusting block 25 is pushed, so that the adjusting block 25 moves in the adjusting groove 26, because the length of the adjusting rod 24 is unchanged, the two ends of the adjusting rod 24 are rotatably connected with the adjusting block 25 and the pushing plate 27, when the position of the adjusting block 25 is changed, the adjusting rod 24 rotates and simultaneously drives the pushing plate 27 to move towards the connecting block 23, so that the pushing plate 27 pushes the connecting block 23 to move towards the placing groove 21, the limiting is relieved, and the shaft 1 is disassembled.

The working principle is as follows: when the anti-rotation device is used, firstly, the anti-rotation block 4 is placed on the axial flow submersible electric pump 2, the cover plate 7 at the top of the fixed rod 9 is opened, the pull ring 6 is pulled upwards, the pull ring 6 drives the slide rod 18 to move upwards, the slide rod 18 drives the connecting rod 14 to move, the two ends of the connecting rod 14 are respectively connected with the slide rod 18 and the limiting block 16 in a rotating mode, the connecting rod 14 is driven to move, the limiting block 16 is driven to move towards the limiting groove 13 while moving, the limiting spring 12 is compressed, the fixed rod 9 is pushed, the bottom end of the fixed rod 9 is arranged in the installation groove, the pulling force on the pull ring 6 is released, the limiting block 16 moves towards the clamping groove 17 under the elastic force of the limiting spring 12, the limiting block 16 and the clamping groove 17 form limiting, the shaft 1 is sleeved on the outer side of the axial flow submersible electric pump, therefore, the connecting block 23 extrudes the telescopic spring 20, the telescopic spring 20 is deformed under stress, when the connecting block 23 moves to be opposite to the connecting groove 28, the connecting block 23 moves towards the inside of the connecting groove 28 under the action of the elastic force of the telescopic spring 20, a limit is formed between the connecting block 23 and the connecting groove 28, when the axial-flow submersible electric pump 2 works, the axial-flow submersible electric pump 2 rotates, because the position of the shaft 1 is fixed, the anti-rotation block 4 rotates along with the axial-flow submersible electric pump 2, when the anti-rotation block 4 rotates to a certain angle, the anti-rotation block collides with the baffle plate 3, the baffle plate 3 limits the rotation angle of the axial-flow submersible electric pump 2, when the shaft 1 needs to be disassembled, the adjusting block 25 is pushed, so that the adjusting block 25 moves in the adjusting groove 26, because the length of the adjusting rod 24 is unchanged, two ends of the adjusting rod 24 are rotatably connected with the adjusting block 25 and the pushing plate 27, when the position of the, so that the pushing plate 27 pushes the connecting block 23 to move toward the placing groove 21, thereby releasing the limit and removing the shaft 1.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.