CN213270762U

CN213270762U - Dismounting device of guide bearing in sea water pump diffuser

Info

Publication number: CN213270762U
Application number: CN202021449357.5U
Authority: CN
Inventors: 邵良; 张兵; 宦国权
Original assignee: Shanghai Lng Co ltd
Current assignee: Shanghai Lng Co ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2021-05-25
Anticipated expiration: 2030-07-21

Abstract

The utility model discloses a dismounting device of guide bearing in sea water pump diffuser, the device includes: the folding and drawing mechanism comprises a supporting mechanism, a folding and drawing mechanism and a driving mechanism; the folding side of the folding and drawing mechanism is used for abutting against the bottom edge of the guide bearing; the drawing side of the folding drawing mechanism is fixed with the driving mechanism and is erected on the seawater pump diffuser through a supporting mechanism; when the guide bearing is disassembled, the folding side of the folding and drawing mechanism penetrates through the guide bearing in a retracted state, and the folding side of the folding and drawing mechanism props against the bottom edge of the guide bearing in an unfolded state; and the driving mechanism applies acting force to the folding drawing mechanism along the direction of pulling out the guide bearing, so that the folding drawing mechanism pulls out the guide bearing from the seawater pump diffuser. The utility model discloses can make the guide bearing promote the atress even, tear out the in-process level all the time and rise, do not take place the incline and sting the installation section, and guarantee the intact of installation hole, can increase substantially work efficiency.

Description

Dismounting device of guide bearing in sea water pump diffuser

Technical Field

The utility model relates to an equipment assembling technical field, concretely relates to dismounting device of guide bearing in sea water pump diffuser.

Background

The sea water pump is a vertical long shaft pump, belonging to a kind of centrifugal pump. The pump can be used for conveying clear water below 55 ℃, rainwater, ferric oxide scale water, sewage, corrosive industrial wastewater, seawater and other liquids, and can also be used for conveying 90 ℃ liquid after special design.

As shown in fig. 1, the design of the guide bearing 503 in the vertical sea water pump 5 is important, and the guide bearing 503 has the following functions: the main shaft is supported, the vertical position is accurately kept, and meanwhile, the radial force which possibly occurs in the pump can be borne, so that the pump runs stably. Therefore, the installation requirement is high. The seawater pump guide bearing 503 is made of two materials, namely a PEEK modified bearing of the water pumping pump barrel and a rubber bearing of the diffuser 502.

As shown in FIG. 2, the rubber guide bearings 503 are composed of an outer shell and an inner ring body rubber made of SUS316L, two upper and lower rubber guide bearings are mounted at two ends of a central vertical pipe of the pump body diffuser, the diameter of the hole of the installation section of the vertical pipe bearing is 190+ 0.040 mm, the outer diameter of the guide bearing is 1900-0.04mm, the length of the installation section is 288mm, and a theoretical gap exists between the two, but the installation requirement is high, and a cylindrical surface holding agent is coated between matching surfaces, so the installation requirement cannot be ensured by the conventional method.

SUMMERY OF THE UTILITY MODEL

The utility model provides a dismounting device of guide bearing in sea water pump diffuser can conveniently carry out the dismantlement of guide bearing to can not damage the installation hole.

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

the utility model provides a dismounting device of guide bearing in sea water pump diffuser, the device includes: the folding and drawing mechanism comprises a supporting mechanism, a folding and drawing mechanism and a driving mechanism;

the folding side of the folding and drawing mechanism is used for abutting against the bottom edge of the guide bearing; the drawing side of the folding drawing mechanism is fixed with the driving mechanism and is erected on the seawater pump diffuser through a supporting mechanism;

when the guide bearing is disassembled, the folding side of the folding and drawing mechanism penetrates through the guide bearing in a retracted state, and the folding side of the folding and drawing mechanism props against the bottom edge of the guide bearing in an unfolded state;

and the driving mechanism applies acting force to the folding drawing mechanism along the direction of pulling out the guide bearing, so that the folding drawing mechanism pulls out the guide bearing from the seawater pump diffuser.

In a preferred embodiment, the supporting mechanism is a cylinder structure with one open end;

the open end of the cylinder structure is used for being supported on the seawater pump structure; the other end of the cylindrical structure fixes the folding and drawing mechanism through a locking mechanism.

In a preferred embodiment, the folding-drawing mechanism includes: a pull rod and an abutment structure;

the pull rod is hinged to the abutting structure, and the abutting structure can rotate along the direction of the pull rod.

In a preferred embodiment, the abutting structure is provided with a first vertical plate and a second vertical plate which are arranged in parallel;

a rotating shaft is pivoted between the first vertical plate and the second vertical plate;

one end of the pull rod is fixed with the rotating shaft.

In a preferred embodiment, a through hole is formed in the center of the abutting structure, and a pair of groove bodies are symmetrically formed on the inner wall of the through hole; the opening direction of the groove body is opposite to the direction of the position of the pull rod;

a rotating shaft is pivoted in the two groove bodies;

one end of the pull rod is fixed with the rotating shaft.

In a preferred embodiment, the abutment structure comprises: the circular abutting plate and the circular truncated cone are arranged on the circular abutting plate;

two sides of the abutting structure are processed into planes through a cutting process, and the upper side and the lower side of the abutting structure are symmetrically parallel to the center of the abutting plate; the size of the distance between the upper plane and the lower plane is smaller than the diameter of the inner circle of the guide bearing, so that the butt joint plate can stretch into and pass through the inner circle of the guide bearing in a turnover vertical state.

The diameter of the abutting plate is equal to the outer diameter of the guide bearing; the diameter of the circular truncated cone is equal to the inner diameter of the guide bearing. In a preferred embodiment, the drive mechanism comprises: a penetrating jack;

the drawing side of the folding and drawing mechanism sequentially penetrates through the other end of the cylindrical structure and the penetrating jack, and the drawing side of the folding and drawing mechanism and the penetrating jack are fixed at the other end of the cylindrical structure through the locking mechanism.

In a preferred embodiment, the drive mechanism further comprises: a hydraulic pump for providing hydraulic power to the penetrating jack.

In a preferred embodiment, the locking mechanism comprises: a nut;

the nut is meshed through an external thread arranged on the drawing side of the folding and drawing mechanism, and the drawing side of the folding and drawing mechanism and the pressure penetration type jack are fixed at the other end of the cylindrical structure.

In a preferred embodiment, the locking mechanism further comprises: a baffle plate;

the stop piece is pressed on the penetrating jack by the nut, and the drawing side of the folding and drawing mechanism and the penetrating jack are fixed at the other end of the cylindrical structure in an auxiliary mode.

Advantageous effects

The utility model can adapt to the position of the guide bearing in the seawater pump by folding and unfolding the folding and drawing mechanism, overcomes the problem of inconvenient installation of the disassembling tool, and is convenient for the use of the disassembling tool;

when the guide bearing is overhauled and removed, the guide bearing is uniformly lifted and stressed, and is horizontally raised all the time in the removing process, so that the installation section is not inclined to be seized, and the integrity of the installation inner hole is ensured;

the utility model discloses a hydraulic jack's lifting speed is far higher than the lifting speed of jackscrew screw in, can guarantee that once heating accomplishes dismantlement work, improves work efficiency greatly.

Drawings

Fig. 1 is a schematic diagram showing the installation position and installation manner of a diffuser and a guide bearing in a seawater pump in the prior art.

FIG. 2 shows a schematic view of a guide bearing in a prior art seawater pump diffuser;

FIG. 3 is a schematic diagram illustrating a method of removing a guide bearing in a prior art seawater pump diffuser;

fig. 4 shows a schematic view of the assembly of the dismounting device of the present invention with the guide bearing in the diffuser;

fig. 5 shows a schematic view of the folding and pulling mechanism of the present invention extending into the guide bearing in a retracted state;

figure 6 shows a schematic view of the folding and pulling mechanism of the present invention;

figure 7 shows a bottom view of the abutment structure with the through-hole and the trough body;

figure 8 shows a front view of the abutment structure with a through hole and a groove body;

figure 9 shows a schematic view of the cylindrical structure of the present invention;

fig. 10 shows a schematic view of a penetrating jack according to the present invention;

figure 11 shows a schematic view of a hydraulic pump according to the present invention;

fig. 12 shows a schematic view of the dismounting device according to the present invention in the diffuser when dismounting the guide bearing.

Reference numerals

1. A support mechanism; 101. a cylindrical structure;

2. a folding and drawing mechanism; 201. a pull rod; 202. a butt joint plate; 203. a circular truncated cone; 204. a first vertical plate; 205. a second vertical plate; 206. a rotating shaft; 207. a trough body; 208. a through hole;

3. a drive mechanism; 301. a penetrating jack; 302. a hydraulic pump;

4. a locking mechanism; 401. a nut; 402. a baffle plate;

5. a sea water pump; 501. pump shaft 502, diffuser 503, guide bearing 504, jackscrew; 505. a central riser.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying drawings. These embodiments are provided only for illustrating the present invention and are not intended to limit the present invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Through research and analysis, as shown in fig. 3, a temperature difference assembly method is adopted in the existing method for mounting, a rubber guide bearing of a sea water pump diffuser is cooled, two M10 threaded holes are originally designed by the guide bearing during dismounting, two M10 screw jack screws 504 are screwed in, a riser bearing mounting section is heated simultaneously, and the jack screws 504 are screwed in continuously to eject the shaft sleeve. However, because the fit clearance between the guide bearing and the mounting hole is small, the two jackscrews 504 are required to be screwed in synchronously and completely depending on experience and hand feeling, and the screwing speed is low, so that the heating conduction can be rapidly transmitted to the guide bearing from the mounting section of the vertical pipe bearing, the guide bearing and the vertical pipe bearing can be heated and expanded together, the effect of temperature difference disassembly cannot be achieved, and the guide bearing can be disassembled after repeated cooling and reheating. The guide bearing may be deflected, so that the guide bearing cannot be seized and disassembled, and destructive disassembly is performed, which may damage the inner surface of the mounting section of the riser bearing and affect the mounting of a new guide bearing.

Based on above-mentioned research and analysis, the utility model provides a be applied to the dismounting device of guide bearing among the sea water pump diffuser to solve guide bearing and dismantle the in-process, the instrument installation is inconvenient, and guide bearing that guide bearing atress inequality leads to dismantles the effect poor, the inefficiency scheduling problem.

The following describes in detail a dismounting device applied to a guide bearing in a sea water pump diffuser according to the present invention with reference to fig. 4 to 12.

As shown in fig. 4, the dismounting device for the guide bearing in the sea water pump diffuser of the present invention mainly comprises: a supporting mechanism 1, a folding and drawing mechanism 2 and a driving mechanism 3. The folding side of the folding and drawing mechanism 2 is used for abutting against the bottom edge of the guide bearing 503; the drawing side of the folding drawing mechanism 2 is fixed with the driving mechanism 3 and is erected on the seawater pump diffuser through the supporting mechanism 1. In the detaching process, the driving mechanism 3 applies acting force to the folding and drawing mechanism 2 along the direction of pulling out the guide bearing, so that the folding and drawing mechanism 2 pulls the guide bearing 503 to pull out the guide bearing from the seawater pump diffuser.

The utility model discloses in, folding drawing mechanism 2's folding side can freely overturn, as shown in fig. 5, is dismantling guide bearing 503 in-process, folding drawing mechanism 2's folding side is the state of packing up to make folding side can pass guide bearing 503 smoothly, after reacing the predetermined position, folding side expandes, supports folding side guide bearing 503 bottom edge, thereby accomplishes folding drawing mechanism 2 and guide bearing 503's assembly.

As shown in fig. 6, the folding drawing mechanism 2 of the present invention may include: a pull rod 201 and an abutment structure. The utility model discloses consider the position that the guide bearing is arranged in the sea water pump diffuser, in the guide bearing is stretched into that the butt structure can be smooth for the convenience, connect the articulated mode of design into between pull rod 201 and the butt structure to make the butt structure can form for pull rod 201 and pack up the state, the butt structure of being convenient for passes the guide bearing.

As shown in fig. 6, in an embodiment, the abutting structure may be provided with a first vertical plate 204 and a second vertical plate 205 in parallel, a circular hole is formed in the middle of the two vertical plates, and the rotating shaft 206 penetrates through the circular holes of the two vertical plates simultaneously to fix the pull rod 201 and the rotating shaft 206, so as to realize the overturning of the abutting structure relative to the pull rod 201. In this way the maximum angle at which the abutment structure can be turned relative to the pull rod 201 is 90 degrees. The pull rod 201 and the rotating shaft 206 may be fixed by welding. In order to further improve the stress at the joint, a round hole may be formed in the pull rod 201, and the round hole and the rotating shaft 206 form a clearance or transition fit, so that the pull rod 201 and the rotating shaft 206 can bear a larger pulling force while the abutting portion can rotate relative to the pull rod 201.

In another embodiment, as shown in fig. 7 and 8, a rectangular through hole 208 may be formed at the center of the abutting structure, and the width of the through hole 208 can accommodate the width of the pull rod 201. A pair of groove bodies 207 is formed in the inner wall on the opposite side of the through hole 208, the rotating shaft 206 is placed in the two groove bodies, and the pull rod 201 and the rotating shaft 206 are fixed, so that the abutting structure can be turned relative to the pull rod 201. It should be noted here that the opening direction of the slot 207 is opposite to the direction of the position of the pull rod 201, and when in use, the rotating shaft 206 and the pull rod 201 can be fixed, and then the rotating shaft 206 is clamped in the slot 207. In this way the maximum angle at which the abutment structure can be flipped relative to the drawbar 201 is less than 90 degrees and greater than 45 degrees. The pull rod 201 and the rotating shaft 206 may be fixed by welding. In order to further improve the stress at the joint, a round hole may be formed in the pull rod 201, and the round hole and the rotating shaft 206 form a clearance or transition fit, so that the pull rod 201 and the rotating shaft 206 can bear a larger pulling force while the abutting portion can rotate relative to the pull rod 201.

The utility model discloses in, the butt structure cooperatees for can be more convenient with the guide bearing, can with the butt structural design is circular structure. As shown in fig. 6 to 8, specifically, the abutment structure may include: the circular butt plate 202 and the circular truncated cone 203 arranged on the butt plate 202 may be an integrated structure formed by milling. The diameter of the circular abutting plate 202 is equal to the outer diameter of the guide bearing, so that the abutting plate 202 can be guaranteed to completely abut against the edge of the guide bearing; the diameter of the circular truncated cone 203 is equal to the inner diameter of the guide bearing, so that before the abutting plate 202 abuts against the edge of the guide bearing, the circular truncated cone 203 is used for positioning, when the circular truncated cone 203 smoothly enters the guide bearing, the abutting structure is confirmed to smoothly reach the corresponding position of the bottom of the guide bearing, and the abutting plate 202 can be completely abutted against the edge of the bottom of the guide bearing; in addition, the circular truncated cone 203 can also play a certain supporting role on the inner wall of the guide bearing, so that the force applied to the guide bearing is more uniform, and the guide bearing is prevented from bending and deforming due to uneven tension.

The utility model discloses in order to make things convenient for the butt structure more to put into the guide bearing, can utilize technologies such as mill, car, ream, be the plane with the both sides processing of butt structure to when preventing that the butt structure from putting into the guide bearing inside, take place the problem that the edge blocked.

The utility model discloses in, supporting mechanism 1 except right folding drawing mechanism 2 plays the support fixed action, mainly cooperatees at the diffuser edge of dismantling in-process and sea water pump, provides a reaction force for actuating mechanism 3. Specifically, as shown in fig. 9, the support mechanism 1 may be a cylindrical structure 101 with an opening at one end, and the diameter of the cylinder is larger than the outer diameter of the guide bearing. The wall of the open end of the cylindrical structure 101 is supported on a diffuser in the seawater pump; the other end of the cylindrical structure 101 may fix the drawing side of the folding-drawing mechanism 2 to the other end of the cylindrical structure 101 by a lock mechanism 4. When the driving mechanism 3 applies a force to the drawbar 201 in the folding-drawing mechanism 2, the diffuser in the cylindrical structure 101 and the seawater pump can give a supporting force to the penetrating jack 301 to prevent the penetrating jack 301 from moving toward the guide bearing.

The utility model discloses in, as shown in fig. 10, actuating mechanism 3 can adopt penetrating jack 301, and pull rod 201 among the folding drawing mechanism 2 passes in proper order round hole and the mounting hole in the middle of penetrating jack 301 of seting up on the other end of drum structure 101 can utilize locking mechanical system 4 to fix penetrating jack 301 and folding drawing mechanism 2 simultaneously drum structure 101's the other end. The penetrating jack 301 uses the cylindrical structure 101 as a support table to provide a force to the pull rod 201 in the folding and pulling mechanism 2 along the direction of pulling the guide bearing, so that the folding and pulling mechanism 2 pulls the guide bearing out of the diffuser in the seawater pump.

As shown in fig. 11, in the present invention, a hydraulic pump 302 may be further provided for the detaching device in order to cooperate with the use of the penetrating jack 301. The operator supplies hydraulic power to the penetrating jack 301 through the hydraulic pump 302, so that the penetrating jack 301 operates normally.

As shown in fig. 4, the locking mechanism may include: a nut 401. The folding and drawing mechanism 2 is fixed to the other end of the cylindrical structure 101 by engaging a nut 401 with an external thread provided on the drawing side of the draw bar 201 in the folding and drawing mechanism 2. It is also possible to press the penetration jack 301 with the nut 401 while fixing the penetration jack 301 together at the other end of the cylindrical structure 101. Further, the locking mechanism may further include: a baffle 402. The penetrating jack 301 can be prevented from being damaged by concentrated stress by using the blocking piece 402 to be filled below the nut 401.

As shown in fig. 12, in use, the drawing side of the pull rod 201 in the folding and drawing mechanism 2 is sequentially passed through the cylindrical structure 101 and the penetrating jack 301, and is pre-tightened by the nut 401; retracting the abutting structure in the folding and pulling mechanism 2 relative to the pull rod 201 and extending into the guide bearing 503; after reaching the predetermined position, the abutting structure is in an unfolded state relative to the pull rod 201, the drawing side of the pull rod 201 is pulled, the abutting structure is stably abutted to the bottom edge of the bearing, and then the nut 401 is screwed, so that the penetrating jack 301 and the folding and drawing mechanism 2 are fixed on the cylindrical structure 101. The hydraulic pump is used for providing hydraulic power for the penetrating jack 301, so that the penetrating jack 301 is gradually lifted, and a force in the direction of pulling out the guide bearing 503 is provided for the folding and pulling mechanism 2 under the assistance of the nut 401 and the baffle 402, so that the abutting structure in the folding and pulling mechanism 2 pulls out the guide bearing 503 from the diffuser 502 in the seawater pump.

The utility model can adapt to the position of the guide bearing in the diffuser of the seawater pump by retracting and expanding the folding and drawing mechanism 2, thereby overcoming the problem of inconvenient installation of the disassembling tool and facilitating the use of the disassembling tool; when the guide bearing is overhauled and removed, the guide bearing is uniformly lifted and stressed, and is horizontally raised all the time in the removing process, so that the installation section is not inclined to be seized, and the integrity of the installation inner hole is ensured; the utility model discloses a hydraulic jack's lifting speed is far higher than the lifting speed of jackscrew screw in, can guarantee that once heating accomplishes dismantlement work, improves work efficiency greatly.

The present invention is further illustrated by the following examples.

In this embodiment, the rubber guide shaft of the diffuser in the sea water pump is taken as an example for disassembling, and a detailed description is given to a disassembling device for the guide bearing in the diffuser of the sea water pump.

As shown in fig. 4, the detaching device in this example mainly includes: the folding and drawing mechanism comprises a folding and drawing mechanism 2, a supporting mechanism 1, a driving mechanism 3 and a locking mechanism.

As shown in fig. 6, the lower end of the folding-drawing mechanism 2 adopts an abutting structure composed of an abutting plate 202 and a circular truncated cone 203 provided thereon. The abutting structure in the folding drawing mechanism 2 stretches into the guide bearing in a folding state relative to the pull rod 201, and after reaching a preset position, the abutting structure is unfolded relative to the pull rod 201, the circular truncated cone 203 is used for positioning, if the circular truncated cone 203 smoothly enters the interior of the guide bearing, the positioning is completed, and the abutting plate 202 is completely abutted to the edge of the bottom of the guide bearing.

In addition, in order to facilitate the abutting structure to enter the guide bearing, two sides of the abutting structure can be machined into a plane by milling, turning, spot facing and other processes to form a waist drum shape.

As shown in fig. 6, the center of the circular truncated cone 203 is welded with a first riser 204 and a second riser 205. The rotating shaft 206 is sequentially inserted into a round hole in the first vertical plate 204, a through hole in one end of the pull rod 201 and a round hole in the second vertical plate 205, so that the abutting structure is turned relative to the pull rod 201. In this way, the abutment structure can be turned 90 degrees with respect to the pull rod 201, passing through the guide bearing; the abutment structure abuts the guide bearing when the abutment structure is in a vertical state with respect to the pull rod 201.

As shown in FIG. 9, the inner diameter of the cylindrical structure 101 is slightly larger than the maximum outer diameter of the guide bearing, one end of the cylindrical structure 101 is open, and a circular plate with a central hole is welded at the other end, and the diameter of the central hole is slightly larger than that of the drawing screw. After the folding and drawing mechanism 2 is positioned, the open end of the cylinder faces downwards and is supported on a diffuser center vertical pipe 505 of the seawater pump; the pull rod 201 passes through the center hole and the center hole of the penetration jack 301 in this order, the exposed portion of the pull rod 201 has an external thread, and the stopper piece 402 is mounted on the pull rod 201 and tightened with the nut 401, thereby fixing the penetration jack 301 and the folding and pulling mechanism 2 to the cylindrical structure 101.

The penetrating jack 301 is connected to a manual hydraulic pump 302, and the hydraulic pump 302 is operated to actuate the penetrating jack 301 to lift the folding and pulling mechanism 2, thereby pulling and pulling the guide bearing out of the diffuser center riser 505.

To sum up, when the guide bearing is overhauled and dismantled, the guide bearing can be uniformly lifted and stressed by using the dismounting device, the guide bearing is always horizontally lifted in the dismantling process, the installation section is not clamped due to deflection, and the completeness of the installation inner hole is ensured. The use of the penetrating jack 301 is matched, the lifting speed is far higher than that of screwing in of the jackscrew, the disassembly work can be finished by one-time heating, and the working efficiency is greatly improved.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A device for detaching a guide bearing in a diffuser of a seawater pump is characterized by comprising: the folding and drawing mechanism comprises a supporting mechanism (1), a folding and drawing mechanism (2) and a driving mechanism (3);

the folding side of the folding and drawing mechanism (2) is used for being abutted against the bottom edge of the guide bearing; the drawing side of the folding drawing mechanism (2) is fixed with the driving mechanism (3) and is erected on the seawater pump diffuser through the supporting mechanism (1);

when the guide bearing is disassembled, the folding side of the folding and drawing mechanism (2) penetrates through the guide bearing in a retracted state, and the folding side of the folding and drawing mechanism (2) props against the bottom edge of the guide bearing in an unfolded state;

and the driving mechanism (3) applies acting force to the folding and drawing mechanism (2) along the pulling direction of the guide bearing, so that the folding and drawing mechanism (2) pulls the guide bearing out of the sea water pump diffuser.

2. Dismounting device according to claim 1, characterized in that the support means (1) is a cylindrical structure (101) open at one end;

the open end of the cylindrical structure (101) is used for supporting on the sea water pump structure; the other end of the cylindrical structure (101) fixes the folding and drawing mechanism (2) through a locking mechanism (4).

3. Dismounting device according to claim 1, characterized in that said folding-drawing mechanism (2) comprises: a pull rod (201) and an abutment structure;

the pull rod (201) is hinged with an abutting structure, and the abutting structure can rotate along the direction of the pull rod (201).

4. -dismounting device according to claim 3, characterised in that said abutment structure is provided with a first riser (204) and a second riser (205) arranged in parallel;

a rotating shaft (206) is pivoted between the first vertical plate (204) and the second vertical plate (205);

one end of the pull rod (201) is fixed with the rotating shaft (206).

5. The dismounting device according to claim 3, characterized in that a through hole (208) is formed in the center of the abutting structure, and a pair of grooves (207) are symmetrically formed on the inner wall of the through hole (208); the opening direction of the groove body (207) is opposite to the direction of the position of the pull rod 201;

a rotating shaft (206) is pivoted in the two groove bodies (207);

one end of the pull rod (201) is fixed with the rotating shaft (206).

6. A dismounting device according to any one of claims 3 to 5, characterized in that said abutment structure comprises: a circular abutting plate (202) and a circular truncated cone (203) arranged on the circular abutting plate;

two sides of the abutting structure are machined into planes through a cutting process;

the diameter of the abutting plate (202) is equal to the outer diameter of the guide bearing; the diameter of the circular truncated cone (203) is equal to the inner diameter of the guide bearing.

7. Dismounting device according to claim 2, characterized in that the drive mechanism (3) comprises: a penetrating jack (301);

the drawing side of the folding and drawing mechanism (2) sequentially penetrates through the other end of the cylindrical structure (101) and the penetrating jack (301), and the drawing side of the folding and drawing mechanism (2) and the penetrating jack (301) are fixed at the other end of the cylindrical structure (101) through the locking mechanism (4).

8. Dismounting device according to claim 7, characterized in that the drive mechanism (3) further comprises: a hydraulic pump (302) for providing hydraulic power to the penetrating jack (301).

9. Dismounting device according to claim 7, characterized in that the locking mechanism (4) comprises: a nut (401); the nut (401) is meshed with the external thread arranged on the drawing side of the folding drawing mechanism (2), and the drawing side of the folding drawing mechanism (2) and the pressure penetration type jack (301) are fixed at the other end of the cylindrical structure (101).

10. Dismounting device according to claim 9, characterized in that the locking mechanism (4) further comprises: a baffle plate (402); the nut (401) presses the baffle sheet (402) on the penetrating jack (301), and the baffle sheet (402) assists in fixing the drawing side of the folding and drawing mechanism (2) and the pressing penetrating jack (301) at the other end of the cylindrical structure (101).