阅读说明：本技术 一种分体式油缸拆装装置及方法 (Split type oil cylinder dismounting device and method ) 是由 覃忠奎 万永斌 张乐 林靖朋 蔡辉君 曾忠旬 于 2021-09-01 设计创作，主要内容包括：本发明公开了油缸拆装技术领域的一种分体式油缸拆装装置及方法,包括底座,底座具有用于承载下缸体的承载面和用于容置柱塞的容置空间；水平调节机构,水平调节机构设置于底座的底部,用于将底座的承载面调节至水平位置；顶托机构,顶托机构设置于容置空间内,用于对柱塞进行顶托并减小柱塞的下移速度。本发明通过底座顶部的承载面对油缸的下缸体进行支撑固定；通过水平调节机构将下缸体的轴线调整至竖直位置,可以确保柱塞回装时与下缸体处于同轴状态；通过顶托机构对下移柱塞进行顶托并减小柱塞的下降速度,不仅保证了密封的完整性,提高油缸密封更换的安装质量,还可以降低作业安全风险,提高作业效率,降低作业人员劳动负荷。(The invention discloses a split type oil cylinder dismounting device and a split type oil cylinder dismounting method in the technical field of oil cylinder dismounting, and the split type oil cylinder dismounting device comprises a base, wherein the base is provided with a bearing surface for bearing a lower cylinder body and an accommodating space for accommodating a plunger; the horizontal adjusting mechanism is arranged at the bottom of the base and is used for adjusting the bearing surface of the base to a horizontal position; and the jacking mechanism is arranged in the accommodating space and is used for jacking the plunger and reducing the downward moving speed of the plunger. The lower cylinder body of the oil cylinder is supported and fixed through the bearing surface at the top of the base; the axis of the lower cylinder body is adjusted to a vertical position through the horizontal adjusting mechanism, so that the plunger and the lower cylinder body are in a coaxial state during the back assembly; the downward moving plunger is jacked and the descending speed of the plunger is reduced through the jacking mechanism, so that the sealing integrity is guaranteed, the mounting quality of the oil cylinder seal replacement is improved, the operation safety risk can be reduced, the operation efficiency is improved, and the labor load of operators is reduced.)

1. The utility model provides a split type hydro-cylinder dismouting device which characterized in that includes:

the base (10), the said base (10) has a bearing surface (111) used for bearing the lower cylinder (51) and a space (141) used for holding the plunger (53);

the horizontal adjusting mechanism (20), the horizontal adjusting mechanism (20) is connected with the base (10) and is used for adjusting the bearing surface (111) of the base (10) to a horizontal position;

the jacking mechanism (30) is arranged in the accommodating space (141) and used for jacking the plunger (53) and reducing the downward moving speed of the plunger (53).

2. The split type oil cylinder dismounting device according to claim 1, wherein the base (10) comprises vertical plates (12), a bearing plate (11) and a support plate (13), at least three vertical plates (12) are uniformly distributed around the circumference of the support plate (13), and the support plate (13) is fixedly connected with the vertical plates (12) to form the accommodating space (141); the bearing plate (11) is arranged at the top end of the vertical plate (12) and is parallel to the supporting plate (13), and the upper surface of the bearing plate (11) is a bearing surface (111).

3. The split type oil cylinder dismounting device according to claim 2, wherein the vertical plate (12) comprises a vertical part (121) and a horizontal part (122) which are vertically connected, and the support plate (13) is fixedly connected to the top end of the horizontal part (122); and a reinforcing plate (14) is arranged on one side of the vertical part (121), the top end of the reinforcing plate (14) is fixedly connected with the bearing plate (11), and the bottom end of the reinforcing plate is fixedly connected with the supporting plate (13).

4. The split type oil cylinder dismounting device according to claim 1, wherein the horizontal adjusting mechanism (20) is arranged at the bottom end of a vertical plate (12) of the base (10);

the horizontal adjusting mechanism (20) comprises an upper fixing base plate (21), a movable base plate (22), a lower fixing base plate (23), a mounting plate (24) and a driving screw (25), the upper fixing base plate (21) is fixedly arranged at the bottom end of the vertical plate (12), the mounting plate (24) is fixedly arranged at the outer end of the lower fixing base plate (23), the driving screw (25) is in threaded connection with the mounting plate (24), and the end part of the driving screw (25) is abutted to the movable base plate (22); the movable base plate (22) is movably arranged between the upper fixed base plate (21) and the lower fixed base plate (23), a lifting inclined plane is arranged on the movable base plate (22), and a guide inclined plane matched with the lifting inclined plane is arranged on the upper fixed base plate (21) or the lower fixed base plate (23).

5. The split type oil cylinder dismounting device according to claim 1, wherein the jacking mechanism (30) comprises a housing (31), a lifting screw (32) and a jacking plate (33), the lifting screw (33) is arranged on the housing (31) in a liftable manner along a vertical direction, and the jacking plate (33) is horizontally arranged at the top end of the lifting screw (32).

6. The split type oil cylinder dismounting device is characterized in that a small bevel gear (34) and a large bevel gear (35) which are in meshing transmission are arranged in the shell (31), the large bevel gear (35) is rotatably connected with the shell (31) through a thrust bearing (37), and the lifting screw (32) penetrates through the shell (31) and is in threaded connection with a threaded hole of the large bevel gear (35); the small bevel gear (34) is fixedly arranged on a driving shaft (38), and one end of the driving shaft (38) penetrates through the shell (31) and is connected with a driving hand wheel (36).

7. The split type oil cylinder dismounting device according to claim 1, further comprising a maintenance platform (40), wherein the maintenance platform (40) comprises a standing plate (41), a guardrail (42) and a staircase (43), the standing plate (41) surrounds the top end of the base (10) for one circle, the guardrail (42) is arranged at the edge position of the standing plate (41), and the top end of the staircase (43) is connected with the standing plate (41).

8. A method for disassembling and assembling a split oil cylinder by using the disassembling and assembling device of any one of claims 1 to 7, which is characterized by comprising the following steps;

s2: adjusting a bearing surface (111) of the dismounting device to a horizontal position;

s3: vertically placing the oil cylinder (50) on a bearing surface (111) of the dismounting device;

s4: disassembling the oil cylinder (50) and replacing the seal;

s5: adjusting the levelness of a lower cylinder body (51) of the oil cylinder (50);

s6: the plunger (53) is axially installed back into the lower cylinder (51) along the lower cylinder (51);

s7: the upper cylinder body (52) is installed again.

9. The method for detaching and assembling the split-type cylinder according to claim 8, wherein the step S5 includes: the frame type level meter is placed on the upper flange surface of the lower cylinder body (51), and the upper flange surface of the lower cylinder body (51) is adjusted to the horizontal position through the horizontal adjusting mechanism (20) of the dismounting device.

10. The method for detaching and assembling the split-type cylinder according to claim 8, wherein the step S6 includes: firstly, hoisting the plunger (53) by using a chain block, then adjusting the plunger (53) to a vertical position by using a frame type level, and finally hoisting the plunger (53) into the lower cylinder body (51) along the axial direction of the lower cylinder body (51) by using the chain block;

when the bottom end of the plunger (53) enters the sealing part of the lower cylinder body (51), the bottom end of the plunger (53) is firstly jacked by the jacking mechanism (30) of the dismounting device, and then the plunger (53) slowly moves downwards by the jacking mechanism (30) of the dismounting device.

Technical Field

The invention relates to the technical field of oil cylinder disassembly and assembly, in particular to a split type oil cylinder disassembly and assembly device and method.

Background

The main machine equipment of the radial forging machine mainly comprises a radial forging machine frame, 4 symmetrically distributed oil cylinders and accessories thereof, wherein the oil cylinders are embedded in the radial forging machine frame. Because the equipment operation is frequent, the inside seal of the oil cylinder needs to be periodically replaced, the whole oil cylinder needs to be firstly removed when the seal is replaced, and then the inside seal of the oil cylinder needs to be replaced off-line. The integral size of the oil cylinder is phi 1540mm 2200mm, the weight of the oil cylinder is about 20 tons, and the existing oil cylinder dismounting method is as follows:

s1: placing a steel billet on the ground;

s2: the oil cylinder 50 is integrally and vertically arranged on a billet;

s3: disassembling the upper cylinder 52, the plunger 53 and the lower cylinder 51 of the oil cylinder 50;

s4: replacing the internal seal;

s5: the plunger 53 is vertically returned into the lower cylinder 51

S6: the upper cylinder 51 is reinstalled.

In the method, the upper surface of the bottom billet is not horizontal, so that the lower cylinder body 51 of the oil cylinder 50 is not horizontal; because the upper flange surface of the lower cylinder body 51 is not perpendicular to the axis of the plunger 53, the plunger 53 is easy to deflect when being re-installed, and meanwhile, the condition that a guide belt and a seal in the oil cylinder 50 are damaged due to the fact that the plunger 53 is too fast in descending speed is easy to cause, and the installation quality of equipment is seriously influenced; meanwhile, the axial size of the oil cylinder is large, the oil cylinder is prone to toppling to cause personnel injury accidents when being vertically erected, and the oil cylinder stands on a movable scaffold during manual operation, so that equipment maintenance operation is unsafe.

Therefore, a separate cylinder mounting and dismounting device or a separate cylinder mounting and dismounting method is needed in the market to solve the problem.

Disclosure of Invention

In view of this, the present invention provides a split cylinder dismounting device to solve the technical problem that it is difficult to ensure the lower cylinder body and the plunger to be coaxial in the existing cylinder replacing method.

The technical scheme adopted by the invention is as follows: the utility model provides a split type hydro-cylinder dismouting device, includes:

the base is provided with a bearing surface for bearing the lower cylinder body and an accommodating space for accommodating the plunger;

the horizontal adjusting mechanism is connected with the base and used for adjusting the bearing surface of the base to a horizontal position;

and the jacking mechanism is arranged in the accommodating space and is used for jacking the plunger and reducing the downward moving speed of the plunger.

Preferably, the base comprises vertical plates, a bearing plate and supporting plates, at least three vertical plates are uniformly distributed around the circumference of the supporting plate, and the supporting plate is fixedly connected with the vertical plates to form the accommodating space; the bearing plate is arranged at the top end of the vertical plate and is parallel to the supporting plate, and the upper surface of the bearing plate is a bearing surface.

Preferably, the vertical plate comprises a vertical part and a horizontal part which are vertically connected, and the support plate is fixedly connected to the top end of the horizontal part; and a reinforcing plate is arranged on one side of the vertical part, the top end of the reinforcing plate is fixedly connected with the bearing plate, and the bottom end of the reinforcing plate is fixedly connected with the supporting plate.

Preferably, the number of the horizontal adjusting mechanisms is multiple, and the horizontal adjusting mechanisms are arranged at the bottom ends of the vertical plates of the base in a one-to-one correspondence manner;

the horizontal adjusting mechanism comprises an upper fixed base plate, a movable base plate, a lower fixed base plate, a mounting plate and a driving screw rod, the upper fixed base plate is fixedly arranged at the bottom end of the vertical plate, the mounting plate is fixedly arranged at the outer end of the lower fixed base plate, the driving screw rod is in threaded connection with the mounting plate, and the end part of the driving screw rod is abutted to the movable base plate; the movable base plate is movably arranged between the upper fixed base plate and the lower fixed base plate, a lifting inclined plane is arranged on the movable base plate, and a guide inclined plane matched with the lifting inclined plane is arranged on the upper fixed base plate or the lower fixed base plate.

Preferably, the jacking mechanism comprises a shell, a lifting screw and a jacking plate, the lifting screw is arranged on the shell in a liftable manner along the vertical direction, and the jacking plate is horizontally arranged at the top end of the lifting screw.

Preferably, a small bevel gear and a large bevel gear which are in meshing transmission are arranged in the shell, the large bevel gear is rotationally connected with the shell through a thrust bearing, and the lifting screw penetrates through the shell and is in threaded connection with a threaded hole of the large bevel gear; the bevel pinion is fixedly arranged on the driving shaft, and one end of the driving shaft penetrates through the shell and is connected with the driving hand wheel.

Preferably, the dismounting device further comprises an overhaul platform, the overhaul platform comprises a standing plate, a guardrail and a staircase, the standing plate surrounds the top end of the base for a circle, the guardrail is arranged at the edge position of the standing plate, and the top end of the staircase is connected with the standing plate.

Another object of the present invention is to provide a method for disassembling and assembling a split-type cylinder, which uses the disassembling and assembling device to disassemble and assemble the cylinder, the method comprising the following steps;

s2: adjusting the bearing surface of the dismounting device to a horizontal position;

s3: vertically placing the oil cylinder on a bearing surface of the dismounting device;

s4: disassembling the oil cylinder and replacing the seal;

s5: adjusting the levelness of the lower cylinder body of the oil cylinder;

s6: the plunger is axially installed back into the lower cylinder body along the lower cylinder body;

s7: and (5) reinstalling the upper cylinder body.

Preferably, the S5 includes: the frame type level meter is placed on the upper flange surface of the lower cylinder body, and the upper flange surface of the lower cylinder body is adjusted to the horizontal position through the horizontal adjusting mechanism of the dismounting device.

Preferably, the S6 includes: firstly, hoisting the plunger by using a chain block, then adjusting the plunger to a vertical position by using a frame type level meter, and finally hoisting the plunger downwards into the lower cylinder body along the axial direction of the lower cylinder body by using the chain block;

when the bottom end of the plunger enters the sealing part of the lower cylinder body, the bottom end of the plunger is firstly jacked by the jacking mechanism of the dismounting device, and then the plunger slowly moves downwards by the jacking mechanism of the dismounting device.

The invention has the beneficial effects that:

the lower cylinder body of the oil cylinder is supported and fixed through the bearing surface on the top of the base, then the axis of the lower cylinder body is adjusted to the vertical position through the horizontal adjusting mechanism arranged at the bottom of the base, the plunger is ensured to be in a coaxial state with the lower cylinder body when being installed again, and then the downward moving plunger is jacked through the jacking mechanism arranged on the base, the descending speed of the plunger is reduced, the integrity of sealing is ensured, and the installation quality of sealing and replacing the oil cylinder is improved.

The invention can not only improve the installation quality of oil cylinder seal replacement, but also reduce the operation safety risk, improve the operation efficiency and reduce the labor load of operators.

Drawings

FIG. 1 is a front view of the detachable cylinder mounting/dismounting device of the present invention;

FIG. 2 is a top view of the split type oil cylinder dismounting device of the present invention with the maintenance platform removed;

FIG. 3 is a schematic structural view of a base;

FIG. 4 is a schematic structural view of a horizontal adjustment mechanism;

FIG. 5 is a schematic structural view of the jacking mechanism;

FIG. 6 is a cross-sectional view of the removable shim plate;

FIG. 7 is a reference diagram of the use state of the split cylinder dismounting device of the present invention;

fig. 8 is a schematic structural view of the oil cylinder.

The reference numbers in the figures illustrate:

10-a base;

11-a carrier plate; 12-standing plates; 13-a support plate; 14-a reinforcing plate;

111-a carrying surface; 141-an accommodating space; 121-vertical section; 122-a horizontal portion;

20-a horizontal adjustment mechanism;

21-fixing a backing plate; 22-a movable backing plate; 23-lower fixed backing plate; 24-a mounting plate; 25-driving the screw;

221-a first guide rail; 222-a second chute;

30-a jacking mechanism;

31-a housing; 32-a lifting screw; 33-a top pallet; 34-bevel pinion gear; 35-large bevel gear; 36-drive hand wheel; 37-a thrust bearing; 38-a drive shaft;

40-maintenance platform;

41-standing plate; 42-a guardrail; 43-an escalator;

50-oil cylinder;

51-lower cylinder; 52-upper cylinder body; 53-plunger.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of 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", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element 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 should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

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

Embodiment, as shown in fig. 1-6, a split cylinder dismounting device is used for dismounting a large cylinder and replacing a cylinder seal; the device includes:

the base 10, the base 10 has a bearing surface 111 for bearing the lower cylinder 51 of the cylinder 50 and a containing space 141 for containing the plunger 53 of the cylinder 50;

the horizontal adjusting mechanism 20 is connected with the bottom of the base 10, and is used for adjusting the bearing surface 111 of the base 10 to a horizontal position;

and the jacking mechanism 30, the jacking mechanism 30 is arranged in the accommodating space 141 and is used for jacking the plunger 53 and reducing the downward moving speed of the plunger 53.

This application supports fixedly through the loading face 111 at base 10 top to the lower cylinder body 51 of hydro-cylinder 50 earlier, then can adjust the axis of lower cylinder body 51 to vertical position through the horizontal adjustment mechanism 20 that sets up in base 10 bottom, it is in coaxial state with lower cylinder body 51 when guaranteeing that plunger 53 repacks, rethread sets up the top in the accommodation space 141 of base 10 and holds in the palm mechanism 30 to plunger 53 carries out the top and holds in the palm and reduce plunger 53's the speed that moves down, sealed integrality has not only been guaranteed, the installation quality of sealed the changing of hydro-cylinder has been improved, can also reduce operation safety risk, the operation efficiency is improved, reduce operation personnel work load.

In an embodiment, as shown in fig. 2 and 3, the base 10 includes a vertical plate 12, a bearing plate 11 and a supporting plate 13, the supporting plate 13 is disc-shaped, 3 to 5 vertical plates 12 are uniformly distributed around the circumference of the supporting plate 13, and the supporting plate 13 is fixedly connected to the vertical plates 12, so that an open accommodating space 141 is formed between the supporting plate 13 and the vertical plates 12, and the accommodating space 141 is used for accommodating the plunger 53 of the oil cylinder 50; the bearing plate 11 is fixedly disposed on the top end of the vertical plate 12, the bearing plate 11 is parallel to the supporting plate 13, and the upper surface of the bearing plate 11 is a bearing surface 111 of the base 10. With the arrangement, the supporting and fixing of the bearing plate 11 and the supporting plate 13 are realized through the vertical plates 12 uniformly distributed around the circumference of the supporting plate 13, and the vertical placement and fixing of the oil cylinder 50 are realized through the supporting effect of the upper surface of the bearing plate 11 on the lower flange surface of the lower cylinder body 51; the supporting plate 13 is connected with the vertical plate 12 to form an accommodating space 141 for accommodating the plunger 53 and the jacking mechanism 30, and the accommodating space 141 is of an open structure, so that a worker can conveniently operate the jacking mechanism 30 to jack the plunger 53 and slowly move the plunger 53 downwards.

When the number of the bearing plate 11 is one, the bearing plate 11 is an annular plate, the annular plate is fixedly disposed at the top ends of the plurality of vertical plates 12, and the upper surface of the annular plate is the bearing surface 111 of the base 10; when the number of the bearing plates 11 is plural, the bearing plates 11 are preferably rectangular plates, the rectangular plates are fixedly disposed at the top ends of the vertical plates 12 in a one-to-one correspondence, and the upper surfaces of the rectangular plates are coplanar to form the bearing surface 111 of the base 10.

Preferably, as shown in fig. 3, the vertical plate 12 includes a vertical part 121 and a horizontal part 122 vertically connected, and the support plate 13 is fixedly connected to the top end of the horizontal part 122; a reinforcing plate 14 is arranged on one side of the vertical part 121 close to the support plate 13, and the top end of the reinforcing plate 14 is fixedly connected with the bearing plate 11 and the bottom end is fixedly connected with the support plate 13. With the arrangement, the vertical plate 12 is arranged to be an L-shaped plate consisting of the vertical part 121 and the horizontal part 122, and the support plate 13 is fixedly connected to the horizontal part 122, so that the structural strength of the base can be improved; the reinforcing plate 14 is fixedly connected to the vertical plate 12, so that the structural strength of the base 10 can be further improved.

In an embodiment, as shown in fig. 2 and 3, there are a plurality of horizontal adjusting mechanisms 20, and the horizontal adjusting mechanisms 20 are disposed at the bottom end of the vertical plate 12 of the base 10 in a one-to-one correspondence. So set up, set up horizontal adjustment mechanism 20 one-to-one in the bottom of riser 12, be convenient for through the height of adjusting single riser 12, adjust the bearing surface 111 at base 10 top to horizontal position fast.

Preferably, as shown in fig. 4, each horizontal adjustment mechanism 20 includes an upper fixed pad 21, a movable pad 22, a lower fixed pad 23, a mounting plate 24, and a driving screw 25; go up fixed backing plate 21 and fix and set up in the bottom of riser 12, lower fixed backing plate 23 sets up under last fixed backing plate 21, and movable backing plate 22 is mobilizable along the horizontal direction sets up between last fixed backing plate 21 and lower fixed backing plate 23, is equipped with a lift inclined plane on the movable backing plate 22, goes up fixed backing plate 21 or is equipped with down on the fixed backing plate 23 and is used for with lift inclined plane matched with direction inclined plane. The mounting plate 24 is fixedly arranged at the outer end of the lower fixed backing plate 23, the driving screw 25 is connected to the mounting plate 24 in a threaded manner, and the end part of the driving screw 25 is abutted against the movable backing plate 22. So set up, accessible rotate drive screw 24 and make activity backing plate 22 along backup pad 13 radial movement relatively lower fixed backing plate 23, again through the laminating of the direction inclined plane on last fixed backing plate 21 or the lower fixed backing plate 23 and the lift inclined plane on the activity backing plate 22, realize going up and down fixed backing plate 21, and then adjust the loading face 111 at base 10 top to horizontal position.

Preferably, the height of the end of the lower fixing plate 23 close to the axis of the supporting plate 13 is greater than the height of the end far from the axis of the supporting plate 13, that is, the height of the inner end of the lower fixing plate 23 is greater than the height of the outer end, so that the top of the lower fixing plate 23 forms a guide slope.

More preferably, the movable base plate 22 is connected with the upper fixed base plate 21 and the lower fixed base plate 23 through a guide rail and a sliding groove, so that the movable base plate 22 can move between the upper fixed base plate 21 and the lower fixed base plate 23. Specifically, as shown in fig. 6, a first guide rail 221 is disposed at the top of the movable backing plate 22, a first sliding groove is disposed at the bottom of the upper fixed backing plate 21 along the horizontal direction, and the first guide rail 221 is slidably connected in the first sliding groove; the bottom of the movable backing plate 22 is provided with a second sliding groove 222 along the lifting inclined plane, the top of the lower fixed backing plate 23 is provided with a second guide rail parallel to the lifting inclined plane, and the second guide rail is slidably connected in the second sliding groove 222. With the arrangement, relative movement of the movable backing plate 22, the upper fixed backing plate 21 and the lower fixed backing plate 23 in the radial direction of the support plate 23 can be realized, and the movable backing plate 22 can be effectively prevented from sliding out from between the upper fixed backing plate 21 and the lower fixed backing plate 23.

In an embodiment, as shown in fig. 5, the jacking mechanism 30 includes a housing 31, a lifting screw 32 and a jacking plate 33, the housing 31 is fixedly disposed on the supporting plate 13, and the supporting plate 13 is provided with a relief hole matched with the lifting screw; the lifting screw 33 is arranged on the shell 31 in a lifting manner along the vertical direction, and the lifting stroke of the lifting screw 32 is 220 mm-500 mm; the top blade 33 is horizontally disposed at the top end of the elevating screw 32. In this way, the plunger 53 of the cylinder 50 is supported and jacked by the jacking plate 33 arranged at the top end of the lifting screw 32, and then the plunger 53 is slowly moved downwards by the lifting of the lifting screw 32.

Preferably, a small bevel gear 34 and a large bevel gear 35 which are in meshing transmission are arranged in the shell 31, the axis of the large bevel gear 35 is arranged along the vertical direction, and the large bevel gear 35 is rotationally connected with the shell 31 through a thrust bearing 37; a coaxial threaded hole is formed in the large bevel gear 35, two ends of the lifting screw 32 respectively penetrate through the shell 31 upwards and downwards, and the middle lower part of the lifting screw is connected in the threaded hole of the large bevel gear 35 in a threaded manner; the axis of the bevel pinion is arranged along the horizontal direction, the bevel pinion 34 is fixedly arranged on a driving shaft 38, one end of the driving shaft 38 penetrates through the shell 31 and is rotatably connected with the shell 31 through a bearing, and one end of the driving shaft 38, which is far away from the bevel pinion 34, is connected with a driving hand wheel 36. With such arrangement, the lifting screw 32 can be lifted by rotating the driving hand wheel 36 and then by the meshing transmission of the small bevel gear 34 and the large bevel gear 35, so as to control the downward moving speed of the plunger 53.

In one embodiment, as shown in fig. 1, the device further comprises an inspection platform 40, wherein the inspection platform 40 comprises a standing plate 41, a guardrail 42 and an escalator 43, the standing plate 41 surrounds the top of the base 10 for a worker to stand; the guardrail 42 is arranged at the edge of the standing plate 41 and used for preventing people from falling off accidentally; the top end of the staircase 43 is connected with the standing plate 41 and is used for workers to get on and off the standing plate 41.

A split type oil cylinder dismounting method needs to use the device to dismount the oil cylinder, and comprises the following steps:

s1: the carrying surface 111 of the carrying plate 11 is cleaned to ensure the carrying surface 111 is clean and tidy.

S2: the frame level is placed on the bearing surface 111 of the bearing plate 11, and the bearing surface 111 of the bearing plate 11 is brought into a horizontal position by rotating the driving screw 25 of the horizontal adjustment mechanism 20.

S3: the oil cylinder 50 is lifted to the upper part of the dismounting device through a chain block (also called an electric hoist), and the oil cylinder 50 is lifted downwards until the lower flange surface of the lower cylinder body 51 of the oil cylinder 50 is placed on the bearing surface 111 of the bearing plate 11.

S4: the upper cylinder 52 and the plunger 53 of the cylinder 50 are removed and the seal is replaced.

S5: the frame level is placed on the upper flange face of the lower cylinder 51, and the upper flange face of the lower cylinder 51 is adjusted to the horizontal position by rotating the drive screw 25 of the horizontal adjustment mechanism 20.

S6: the plunger 53 is lifted to the position right above the lower cylinder 51 by using a chain block, then the plunger 53 is adjusted to the vertical position by using a frame type level, and finally the plunger 53 is hung downwards into the lower cylinder 51 along the axial direction of the lower cylinder 51 by using the chain block.

When the bottom end of the plunger 53 enters the sealing part of the lower cylinder 51, the bottom end of the plunger 53 is supported and jacked by the jacking plate 33 of the jacking mechanism 30, and then the plunger 53 slowly moves downwards by the rotation of the lifting screw 32 of the jacking mechanism 30, so that the phenomenon that the plunger 53 falls down quickly to cut the check ring inside the copper bush is avoided.

S7: the upper cylinder 52 is reinstalled and the lower flange of the upper cylinder 52 is connected to the upper flange of the lower cylinder 51 by means of connecting bolts.

Compared with the prior art, the application has at least the following beneficial technical effects:

1. the mounting and dismounting device can improve the mounting quality of oil cylinder seal replacement, reduce the operation safety risk, improve the operation efficiency, reduce the labor load of operators, and has simple oil cylinder seal replacement process and convenient operation.

2. When the dismounting method is used for replacing the oil cylinder seal of the large-metallurgy special steel 16MN diameter forging machine, the construction efficiency is improved, the operation risk is reduced, the time for disassembling, assembling and replacing the oil cylinder seal is reduced to 3 days from 4 days, the construction efficiency is improved, and considerable economic benefits are created.

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