CN219882403U

CN219882403U - Device is demolishd to electric submersible pump spline housing

Info

Publication number: CN219882403U
Application number: CN202320997746.9U
Authority: CN
Inventors: 赵洪珍; 李晓颖; 刘国梁; 刘卫红; 范俊华; 周刘柱
Original assignee: China Petroleum and Chemical Corp
Current assignee: China Petroleum and Chemical Corp
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-10-24
Anticipated expiration: 2033-04-27

Abstract

The utility model belongs to the technical field of oil extraction equipment repair, and particularly relates to a device for dismantling a spline housing of an electric submersible pump. Comprises a supporting component, a fixing component and a traction component; the traction assembly is arranged between the supporting assembly and the fixing assembly, the supporting assembly comprises a supporting flange and a supporting transverse frame, the supporting flange is used for being connected with a connecting flange of the submersible electric pump, one end of the traction assembly is supported by the supporting transverse frame in a limiting mode, the other end of the traction assembly is connected with the fixing assembly, the fixing assembly is provided with a bearing portion matched with the end face of the spline housing, the bearing portion is provided with a bearing hole, and the diameter of the bearing hole is smaller than the outer diameter of the spline housing and larger than the outer diameter of a central shaft of the submersible electric pump. According to the device for dismantling the spline housing of the electric submersible pump, the support of the electric submersible pump during separation of the spline housing is realized through connection of the support flange and the connecting flange, damage to the end face of the electric submersible pump is avoided, and meanwhile slipping of the dismantling device in the dismantling process is avoided.

Description

Device is demolishd to electric submersible pump spline housing

Technical Field

The utility model belongs to the technical field of oil extraction equipment repair, and particularly relates to a device for dismantling a spline housing of an electric submersible pump.

Background

The submersible electric pump has high lift, large discharge capacity, high efficiency and quick production, is an important device for increasing yield in the middle and later stages of oil field development, is generally formed by connecting four units in series, wherein the central shafts of the units are connected through spline sleeves, and the unit shells are connected through flange bolts.

In the oilfield production process, the submersible electric pump unit needs to be placed in an oil well for a long time, and due to the working environment of the submersible electric pump, well laying faults can occur after the submersible electric pump unit works for a long time, and the submersible electric pump unit needs to be lifted out of the oil well at the moment, and a plurality of submersible electric pumps connected together are decomposed and disassembled and then maintained one by one. However, because the submersible electric pump unit runs for a long time and is in the oil of crude oil for a long time, bad factors such as scaling, salt formation, corrosion and the like exist in the oil well, and the phenomenon of rust death can occur between the spline housing and the central shaft. The current method for removing the spline housing mainly comprises the following steps: 1. the knocking method is characterized in that the outer wall of the spline housing is knocked to loosen the spline housing and the central shaft of the electric submersible pump, so that the locking positions of the spline housing and the central shaft are loosened, and finally the spline housing is disassembled; 2. destructive dismantling, namely cutting a notch on the side wall of the spline housing by using a hand-held grinder, taking out an output shaft of the submersible electric pump from the notch, and finally dismantling the spline housing by using other tools; 3. the homemade tool is removed, for example, a homemade hook specially used for removing the spline housing is adopted for picking.

The above-described dismantling method has the following problems in practice: 1. the knocking method has low speed and low working efficiency, and the roundness of the spline housing is easily damaged, so that the spline housing is scrapped. 2. Destructive dismantling, long operation time, high labor intensity and easy physical injury of operators; when the spline housing is severely corroded, the phenomenon that the spline housing cannot be removed exists, and the spline housing and the central shaft are easily scrapped at the same time; in addition, iron scraps are splashed in the operation process, so that the field is easy to pollute. 3. The self-made tool is dismantled, and when the spline housing scales and corrodes seriously, the self-made tool is difficult to disassemble the spline housing, so that the electric submersible pump unit cannot be repaired.

As an improvement, chinese patent utility model with grant number CN208330857U and grant date 2019, 1 month and 4 days discloses a device for disassembling spline housing of electric submersible pump, which comprises a top holding part, a sleeve holding part and a traction part; the first end of the jacking part is connected with the first end of the sleeving part, the second end of the jacking part is abutted against the end part of the electric submersible pump, and the second end of the sleeving part is sleeved on the periphery of the spline sleeve at the end part of the electric submersible pump; the traction part is arranged between the jacking part and the submersible electric pump and is used for driving the jacking part to move in a direction away from the submersible electric pump; and in a state that the traction part drives the top holding part to move, the sleeve holding part drives the spline housing to move towards a direction away from the electric submersible pump. The sleeve holding part of the device adopts a sleeve jackscrew fixing mode, the jacking part and the traction part adopt symmetrical screw rods to rotate to jack the section of the pump to do relative motion, so that the spline housing is forced to be separated from the submersible electric pump, and the purpose of dismantling the spline housing is achieved. Analysis finds that the device is easy to damage the flange surface of the oil-submerged pump when supporting traction operation; the jackscrew is adopted to fix the spline housing to apply radial force to the sleeve, so that the friction force between the spline housing and the output shaft of the electric submersible pump is increased to a certain extent, the difficulty in dismantling the spline housing is increased, the dismantling efficiency is reduced, meanwhile, the external surface of the spline housing is a cylindrical smooth surface, the fixing force is limited, the slipping phenomenon is very easy to occur, and the application scene is limited to a certain extent.

Disclosure of Invention

The utility model aims to provide a device for dismantling a spline housing of an electric submersible pump, which solves the problems that the conventional device for dismantling the spline housing of the electric submersible pump is easy to damage the flange surface of the electric submersible pump and the dismantling device is easy to slip in the dismantling process.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the device for dismantling the spline housing of the electric submersible pump comprises a supporting component, a fixing component and a traction component; the traction assembly is arranged between the supporting assembly and the fixing assembly, the supporting assembly comprises a supporting flange and a supporting transverse frame, the supporting flange is used for being connected with a connecting flange of the electric submersible pump, one end of the traction assembly is supported by the supporting transverse frame in a limiting mode, the other end of the traction assembly is connected with the fixing assembly, the fixing assembly is provided with a bearing portion matched with the end face of the spline housing, the bearing portion is provided with a bearing hole, and the diameter of the bearing hole is smaller than the outer diameter of the spline housing and larger than the outer diameter of a central shaft of the electric submersible pump.

The beneficial effects of the technical scheme are that: according to the utility model, the supporting component connected with the connecting flange of the submersible electric pump and the fixing component for supporting the spline housing of the submersible electric pump are arranged, the fixing component is provided with the supporting part which is convenient for supporting the end face of the spline housing, and the diameter of the supporting hole of the supporting part is smaller than the outer diameter of the spline housing and larger than the outer diameter of the central shaft of the submersible electric pump, so that the traction component between the supporting component and the fixing component is utilized to drive the fixing component to move towards the direction away from the submersible electric pump, and meanwhile, the spline housing is synchronously moved under the drive of the supporting part, so that the purpose of separating the spline housing from the central shaft of the submersible electric pump is achieved. According to the utility model, the spline housing dismantling device of the electric submersible pump is in supporting connection with the electric submersible pump through the supporting flange, so that the end face of the connecting flange of the electric submersible pump is not damaged, and the slipping of the spline housing dismantling device of the electric submersible pump in the dismantling process is avoided; simultaneously, axial force is provided for the spline housing during disassembly of the bearing part, so that the integrity of the spline housing and the central shaft of the submersible electric pump is effectively protected, the disassembly efficiency of the spline housing is improved, and the requirements of on-site repair and use are met.

Further, the bearing part is connected with a fixing component body.

The beneficial effects of the technical scheme are that: by means of the arrangement, the fixing assembly body provides support for the bearing portion, and separation force is transmitted to the bearing portion when the spline housing is detached.

Further, one side of the fixed component body adjacent to the fixed component body is hinged.

The beneficial effects of the technical scheme are that: the device has the advantages of simple hinge structure, easy realization and convenient separation and closing of the fixed assembly body in the narrow space of the pump head of the submersible electric pump.

Further, a traction part is arranged at one end of the fixing component body far away from the bearing part, and the traction component is connected with the fixing component through the traction part.

The beneficial effects of the technical scheme are that: the traction part is connected with the traction component, so that when the spline housing is detached, the traction part can transmit the pulling force of the traction component to the fixed component, so that the fixed component can be ensured to effectively drive the spline housing to move, and the spline housing is separated from the submersible electric pump.

Further, the traction portion is provided with a traction hole coaxially disposed when the fixing assembly is in a closed state.

The beneficial effects of the technical scheme are that: by means of the arrangement, when the fixing assembly is closed, the traction hole is coaxial with the fixing assembly, and the traction rod can conveniently penetrate through the traction hole to be connected with the traction part.

Further, the outer diameter of the fixed component in the closed state is smaller than the inner diameter of the electric submersible pump, and the fixed component can be installed at one end of a spline housing of the electric submersible pump in the separated state.

The beneficial effects of the technical scheme are that: by means of the arrangement, the fixing assembly can be conveniently installed into the electric submersible pump, meanwhile, the supporting portion of the fixing assembly can be in abutting fit with the end face of the spline housing, and therefore the spline housing can be conveniently detached.

Further, the fixed assembly includes a first fixed assembly and a second fixed assembly, the first fixed assembly having a length greater than the second fixed assembly.

The beneficial effects of the technical scheme are that: by means of the arrangement, the traction portion of the first fixing assembly and the traction portion of the second fixing assembly form a height difference in the length direction of the fixing assemblies, so that when the first fixing assembly and the second fixing assembly are closed, the traction portion of the first fixing assembly and the traction portion of the second fixing assembly are coaxial and coincide, the traction holes are coaxial, the traction portions are connected through the traction holes conveniently through the traction rods, and meanwhile the strength of the traction portions for bearing traction force when the spline housing is removed is enhanced.

Further, the traction assembly comprises a traction rod and a traction nut, and the traction rod and the traction nut form a screw transmission mechanism.

The beneficial effects of the technical scheme are that: by means of the arrangement, the spiral transmission mechanism is convenient to convert the rotation force applied to the traction nut into linear motion of the traction rod, so that the traction assembly is convenient to drive the fixing assembly to move, and the spline housing is detached.

Further, the traction rod is provided with a large-diameter section and a small-diameter section, the small-diameter section is connected with the fixing assembly, and the large-diameter section is connected with the traction nut.

The beneficial effects of the technical scheme are that: the arrangement is convenient for forming limit for the connection of the traction rod and the fixed component through the connection part of the large-diameter section and the small-diameter section; because the big footpath section and the little footpath section need bear different external forces when carrying out spline housing demolishs the operation, can effectively guarantee the intensity of traction lever like this to satisfy the user demand.

Further, the traction rod is a lead screw.

The beneficial effects of the technical scheme are that: the arrangement is simple in screw processing, and the screw rod can convert rotary motion into linear motion by being matched with the nut.

Drawings

FIG. 1 is a front view of a combination of the present utility model and an electric submersible pump;

FIG. 2 is a front view of the structure of the present utility model;

FIG. 3 is a front view of the structural retainer of the present utility model;

FIG. 4 is a front view of a structural attachment bracket of the present utility model;

fig. 5 is a top view of fig. 4.

In the figure: 1. a support assembly; 2. a traction rod; 3. a fixing assembly; 4. a draw nut; 5. an electrical submersible pump; 6. a fastening bolt;

11. a support flange; 12. supporting the vertical frame; 13. a support beam;

21. a small diameter section; 22. a large diameter section; 22a, square ends; 22b, a stress application rod hole;

31. a first fixing assembly; 32. a second fixing assembly; 33. a rotating shaft;

51. a connecting flange; 52. a pump head; 53. a central shaft; 54. a spline housing;

111. a flange connection hole; 121. a support hole; 131. supporting the middle section of the beam; 132. a support rod; 133. a limiting hole;

311. a first fixing assembly body; 312. a first traction section; 312a, a first traction aperture; 313. a first support part; 313a, a first support hole; 321. a second fixing assembly body; 322. a second traction section; 322a, a second traction aperture; 323. a second supporting part; 323a, a second holding hole.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

It is noted that relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" or the like does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The features and capabilities of the present utility model are described in further detail below in connection with the examples.

In the embodiment 1 of the spline housing dismantling device for the electric submersible pump, the following steps are shown:

as shown in fig. 1 to 5, the device for removing the spline housing of the electric submersible pump comprises a support assembly 1, a fixing assembly 3 and a traction assembly.

The support assembly 1 comprises a support flange 11, a support beam 13 and a support vertical frame 12. The support flange 11 is provided with flange connecting holes 111 which are in one-to-one correspondence with the connecting flanges 51 of the electric submersible pump 5, namely, the diameter and the hole spacing of the flange connecting holes 111 are the same as those of the flange hole apertures and the hole spacing of the connecting flanges 51 of the pump heads 52 of the electric submersible pump 5; the two support vertical frames 12 are symmetrically arranged on one end face of the support flange 11, and the upper part of the support vertical frame 12 is provided with a support cross beam 13; specifically, the bottom of the support vertical frame 12 is fixedly connected with the support flange 11 by welding, the upper part of the support vertical frame 12 is provided with a support hole 121, and the support cross beam 13 is assembled on the support vertical frame 12 through the support hole 121. In this embodiment, the supporting beam 13 has a three-section structure, the cross section of the middle section 131 of the supporting beam is elliptical, and two sides of the middle section 131 of the supporting beam are provided with the same circular supporting rods 132; the middle section 131 of the supporting beam is provided with a circular limiting hole 133 matched with the traction rod 2, and the diameter of the limiting hole 133 is larger than that of the traction rod 2; the cross section of the support vertical frame 12 is square, and the diameter of the support hole 123 of the support vertical frame 12 is larger than that of the support rod 132 of the support cross beam 13, so that the support cross beam 13 is convenient to be worn on the support vertical frame 12.

The fixing assembly 3 comprises a first fixing assembly 31, a second fixing assembly 32 and a rotating shaft 33 which have the same structure, and the first fixing assembly 31 and the second fixing assembly 32 are movably connected through the rotating shaft 33, so that the first fixing assembly 31 and the second fixing assembly 32 which are movably connected are enclosed to form a fixing space for accommodating the spline housing, the fixing space is of a cylindrical structure, and the fixing space can be enclosed to the periphery and the end face of the spline housing 54, so that the spline housing 54 is wrapped.

The first fixing component 31 comprises a first fixing component body 311 matched with the spline housing, specifically, the first fixing component body 311 is a semicircular groove body, a first traction part 312 is fixed at one end of the first fixing component body 311 far away from the electric submersible pump 5 through welding, and a first bearing part 313 is fixed at one end of the first fixing component body 311 near the electric submersible pump 5 through welding; the first traction portion 312 is circular in shape and is matched with the first fixing assembly body 311, a first traction hole 312a is formed in the center of the first traction portion 312, and a semicircular first bearing hole 313a is formed in the center of the first bearing portion 313. In this embodiment, the first traction portion 312 and the first support portion 313 are both plate-shaped.

The length of the second fixing component 32 is smaller than that of the first fixing component 31, other structures of the second fixing component 32 are the same as those of the first fixing component 31, the second fixing component 32 is also provided with a second traction portion 322 and a second bearing portion 323 which are the same as those of the first fixing component, specifically, the second fixing component 32 comprises a second fixing component body 321 matched with the spline housing 54, the length of the second fixing component body 321 is smaller than that of the first fixing component body 311, so that a height difference is formed between the first traction portion 312 of the first fixing component 31 and the second traction portion 322 of the second fixing component 32 in the length direction of the fixing component, and when the first fixing component 31 is locked with the second fixing component 32, the first traction portion 312 of the first fixing component 31 is coaxially attached with the second traction portion 322 of the second fixing component 32, so that the first traction hole 312a and the second traction hole 322a are coaxial, and the traction rod 2 passes through the traction hole to connect the traction portions, and meanwhile, the strength born by traction force of the traction portions when the spline housing is removed is enhanced. In this embodiment, the length of the fixing assembly is greater than the length of the spline housing, so that the spline housing can be ensured to be completely wrapped by the fixing assembly.

The adjacent sides of the first fixing assembly body 311 and the second fixing assembly body 321 are hinged by a rotation shaft 33. In order to ensure that the fixing assembly can be smoothly installed into the pump head 52 of the electric submersible pump 5 and matched with the spline housing 54, the bearing part of the fixing assembly is used for covering the end face, close to the electric submersible pump 5, of the spline housing 54, the outer diameter of the fixing assembly when the first fixing assembly 31 and the second fixing assembly 32 are in a clasping state is smaller than the inner diameter of the electric submersible pump 5, and one end of the spline housing 54 of the electric submersible pump 5 can be installed when the first fixing assembly 31 and the second fixing assembly 32 are in a separating state. When the first fixing component 31 and the second fixing component 32 are in the closed state, the diameter of the bearing hole formed by the first bearing hole 313a and the second bearing hole 323a is smaller than the outer diameter of the spline housing 54 and larger than the outer diameter of the central shaft 53 of the electric submersible pump 5, so that the inner surface of the bearing part can be effectively abutted with the end face of the spline housing, support is provided for the spline housing when the spline housing is dismounted, and only axial force is provided through the bearing part when the spline housing is dismounted, so that the integrity of the spline housing and the central shaft of the electric submersible pump is effectively protected, and the dismounting efficiency of the spline housing is improved.

The traction assembly comprises a traction rod 2 and a traction nut 4, and the traction rod 2 and the traction nut 4 form a screw transmission mechanism. In this embodiment, the traction rod 2 is a screw rod with a large-diameter section 22 and a small-diameter section 21, the screw thread of the small-diameter section 21 of the screw rod is used to be matched with the traction hole on the traction part of the fixed component 3, the large-diameter section 22 of the screw rod passes through the limit hole 133 of the middle section 131 of the supporting beam, and the supporting and limiting of the screw rod are realized by matching the traction nut 4 matched with the large-diameter section 22 of the screw rod with the supporting beam 13, so that the damage to the central shaft or the spline housing caused by the shaking of the screw rod due to unbalanced holding force can be avoided; one end of the large-diameter section 22 of the screw far away from the small-diameter section 21 of the screw is provided with a square end 22a, and a circular stressing rod hole 22b is arranged in the middle of the square end 22a and is used for applying force through penetrating the stressing rod through the stressing rod hole 22b when the spline housing 54 is dismounted, so that the spline housing 54 is dismounted.

With the structure, the spline housing dismantling device for the electric submersible pump has the following using process:

s1: the fixed assembly is opened, the first fixed assembly 31 and the second fixed assembly 32 are in an open state, the opened fixed assembly is placed in a gap between the pump head 52 of the electric submersible pump 5 and the spline housing 54, the spline housing 54 completely enters a fixed space of the fixed assembly, the first fixed assembly 31 and the second fixed assembly 32 are closed, traction portions of the fixed assembly 3 are overlapped, namely traction holes are overlapped, and therefore cohesion of the fixed assembly 3 to the spline housing 54 is completed.

S2: the flange connecting holes 111 of the support flange 11 of the support assembly 1 are in one-to-one correspondence with the flange holes of the connecting flange 51 of the electric submersible pump 5, and are screwed at symmetrical positions by using fastening bolts 6.

S3: the small-diameter section 21 of the screw rod is penetrated by the limit hole 133 of the supporting beam 13 of the supporting component 1, and the square end 22a of the large-diameter section 22 of the screw rod is rotated clockwise to lead the small-diameter section 21 of the screw rod to be completely screwed into the traction hole, thereby completing the connection of the traction rod 2 and the fixed component 3.

S4: screwing the traction nut 4 from the large-diameter section 22 of the screw rod, so that the traction nut 4 is screwed to the outer wall surface of the supporting beam 13 of the supporting assembly 1; the traction nut 4 is rotated clockwise by using tools such as a wrench, so that the screw rod drives the fixed assembly 3 to axially move, and the spline housing 54 is driven by the fixed assembly 3 to axially move towards the direction deviating from the electric submersible pump 5 until the fixed assembly 3 is separated from the central shaft 53 of the electric submersible pump 5.

S5: the fastening bolts 6 connecting the support flange 11 of the support assembly 1 and the connecting flange 51 of the electric submersible pump 5 are detached, the electric submersible pump spline housing removing device is detached, the screw rod is rotated anticlockwise to be separated from the fixing assembly 3, the fixing assembly 3 is opened, the first fixing assembly 31 and the second fixing assembly 32 are in a separated state, the detached spline housing 54 is taken out, and the spline housing 54 is removed from the central shaft 53 of the electric submersible pump 5.

Embodiment 2 of the spline housing removal device for an electric submersible pump of the utility model:

in embodiment 1 of the electric submersible pump spline housing removal device, the first fixing assembly and the second fixing assembly are movably connected through a rotating shaft. In this embodiment, the first fixing component and the second fixing component are detachably connected, for example, by adopting a buckle-to-insert mode.

Embodiment 3 of the spline housing removal device for an electric submersible pump of the utility model:

in example 1 of the submersible electric pump spline housing removal apparatus, the drawbar has a large diameter section and a small diameter section. In this embodiment, the traction rod is an drift diameter, and the large-diameter section and the small-diameter section are not provided any more, and the traction rod can be penetrated through the stress application rod hole, so that the traction rod is directly applied with acting force to complete the dismantling action.

Embodiment 4 of the spline housing removal device for an electric submersible pump of the utility model:

in embodiment 1 of the submersible electric pump spline housing removal device, the fixing assembly body is a semicircular groove body. In this embodiment, the fixing assembly body may be frame-shaped and secure a certain strength so as to provide necessary support for the pulling portion and the bearing portion when the spline housing is disassembled.

The above description is only a preferred embodiment of the present utility model, and the patent protection scope of the present utility model is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a device is demolishd to electric submersible pump spline housing which characterized in that: comprises a supporting component, a fixing component and a traction component; the traction assembly is arranged between the supporting assembly and the fixing assembly, the supporting assembly comprises a supporting flange and a supporting transverse frame, the supporting flange is used for being connected with a connecting flange of the electric submersible pump, one end of the traction assembly is supported by the supporting transverse frame in a limiting mode, the other end of the traction assembly is connected with the fixing assembly, the fixing assembly is provided with a bearing portion matched with the end face of the spline housing, the bearing portion is provided with a bearing hole, and the diameter of the bearing hole is smaller than the outer diameter of the spline housing and larger than the outer diameter of a central shaft of the electric submersible pump.

2. The submersible electric pump spline housing removal device of claim 1, wherein: the bearing part is connected with a fixed component body.

3. The submersible electric pump spline housing removal device of claim 2, wherein: and one side of the fixed assembly body adjacent to the fixed assembly body is hinged.

4. A device for removing a spline housing of an electric submersible pump according to claim 2 or 3, wherein: the one end of fixed subassembly body keep away from bearing portion is provided with the traction portion, traction assembly passes through traction portion with fixed subassembly is connected.

5. The submersible electric pump spline housing removal apparatus of claim 4, wherein: the traction part is provided with a traction hole, and the traction hole is coaxially arranged when the fixing assembly is in a closed state.

6. The submersible electric pump spline housing removal apparatus of claim 1 or 5, wherein: the outer diameter of the fixed component in the closed state is smaller than the inner diameter of the electric submersible pump, and the fixed component can be installed at one end of a spline housing of the electric submersible pump in the separated state.

7. The submersible electric pump spline housing removal apparatus of claim 6, wherein: the fixed assembly comprises a first fixed assembly and a second fixed assembly, and the length of the first fixed assembly is longer than that of the second fixed assembly.

8. The submersible electric pump spline housing removal device of claim 1, wherein: the traction assembly comprises a traction rod and a traction nut, and the traction rod and the traction nut form a spiral transmission mechanism.

9. The submersible electric pump spline housing removal device of claim 8, wherein: the traction rod is provided with a large-diameter section and a small-diameter section, the small-diameter section is connected with the fixing assembly, and the large-diameter section is connected with the traction nut.

10. The submersible electric pump spline housing removal device of claim 8 or 9, wherein: the traction rod is a screw rod.