Hydraulic machine overhauling device and method for narrow space

Abstract

The invention relates to the technical field of equipment maintenance, and provides a hydraulic machine maintenance device and method for a narrow space. The device comprises a supporting frame, a sliding device and a hoisting device, the sliding device and the hoisting device are connected with the supporting frame, the supporting frame penetrates through the two sides of a cylinder body of the hydraulic machine, the jacked cylinder body is connected with the sliding device and the hoisting device, and the sliding device drives the cylinder body to move away from the hydraulic machine to a first position along the supporting frame; and after the cylinder body reaches the first position, the cylinder body descends to the second position based on the hoisting device, and sealing replacement is completed. According to the scheme, the cylinder body is driven by the sliding device to move along the supporting frame, and sealing replacement of the cylinder body is completed through the hoisting device.

Description

Technical Field

[0001] The present disclosure relates to the technical field of equipment maintenance, and particularly to a hydraulic press maintenance device and method for narrow spaces. Background Art

[0002] The installation area of the four-column hydraulic press needs to be determined according to the working conditions. Therefore, the installation site of the four-column hydraulic press is limited. For example, when conducting the quality inspection of titanium sponge, the requirements for the regional environment are relatively high, and the used four-column hydraulic press is installed in an independent room. When maintaining this equipment, since the hydraulic press is installed in a narrow place and conventional hoisting equipment and devices cannot be arranged in the space of this place, it causes great trouble to the maintenance work of this equipment.

[0003] Therefore, how to maintain the hydraulic press in a narrow space has become an urgent problem to be solved. Summary of the Invention

[0004] In view of this, the present invention provides a hydraulic press maintenance device and method for narrow spaces to solve the technical problem of how to maintain the hydraulic press in a narrow space.

[0005] To solve the above technical problem, in a first aspect, the present invention provides a hydraulic press maintenance device for narrow spaces. The device includes: a support frame, a sliding device, and a hoisting device. The sliding device and the hoisting device are respectively connected to the support frame. The support frame passes through both sides of the cylinder block of the hydraulic press. Among them, the lifted cylinder block is respectively connected to the sliding device and the hoisting device. The sliding device drives the cylinder block to move away from the hydraulic press along the support frame until it reaches the first position; after the cylinder block reaches the first position, the hoisting device is used to lower the cylinder block to the second position and complete the seal replacement.

[0006] Combined with the first aspect, in a possible implementation manner of the first aspect, the support frame includes: a vertical support frame and a horizontal support frame. Among them, the horizontal support frame is connected to the vertical support frame, and the horizontal support frame passes through both sides of the cylinder block of the hydraulic press.

[0007] Combined with the first aspect, in a possible implementation manner of the first aspect, the sliding device includes: a slideway and a translation trolley. Among them, the slideway is connected to the horizontal support frame, and the translation trolley moves along the horizontal support frame based on the slideway.

[0008] Combined with the first aspect, in a possible implementation manner of the first aspect, the outer edge of the lifted cylinder block is clamped with the translation trolley, so that the translation trolley drives the cylinder block to move away from the hydraulic press along the horizontal support frame until it reaches the first position.

[0009] In combination with the first aspect, in a possible implementation of the first aspect, the support frame includes a lifting frame connected to the vertical support frame, and the lifting device is arranged on the lifting frame, wherein the outer periphery of the cylinder body after jacking is provided with a connecting structure, and the lifting device is connected to the cylinder body through the connecting structure.

[0010] In combination with the first aspect, in a possible implementation of the first aspect, the transverse support frame is provided with a groove having the same width and depth, respectively, and the sliding device includes a pulley cooperating with the groove, and the pulley moves along the transverse support frame based on the groove.

[0011] In combination with the first aspect, in a possible implementation of the first aspect, there is a connecting rod between the pulleys, and the connecting rod contacts the cylinder body when moving along the transverse support frame, so that the cylinder body moves along the transverse support frame away from the hydraulic press to the first position under the lifting of the lifting device.

[0012] In combination with the first aspect, in a possible implementation of the first aspect, the device also includes: using a lifting device to lift the cylinder body after the seal replacement is completed to a first position; after the cylinder body reaches the first position after the seal replacement is completed, the sliding device drives the cylinder body along the support frame to the corresponding position of the hydraulic press until the installation of the cylinder body is completed.

[0013] In a second aspect, the present invention provides a method for repairing a hydraulic press in a narrow space, the method comprising: in response to the lifting of the hydraulic press cylinder body, using a sliding device to drive the cylinder body to a first position; in response to the cylinder body reaching the first position, using a lifting device to lower the cylinder body to a second position and complete the seal replacement.

[0014] In combination with the second aspect, in a possible implementation of the second aspect, the method also includes: in response to the cylinder body completing the seal replacement, using a lifting device to raise the cylinder body to a first position; in response to the cylinder body reaching the first position, using a sliding device to drive the cylinder body to a corresponding position of the hydraulic press until the installation of the cylinder body is completed.

[0015] Through the above technical solutions, the present disclosure provides a hydraulic press maintenance device and method for narrow spaces. The hydraulic press maintenance device for narrow spaces includes: a support frame, a sliding device, and a hoisting device. The sliding device and the hoisting device are respectively connected to the support frame. The support frame passes through both sides of the cylinder block of the hydraulic press. Among them, after the cylinder block is lifted, it is respectively connected to the sliding device and the hoisting device. The sliding device drives the cylinder block to move away from the hydraulic press along the support frame until it reaches the first position; after the cylinder block reaches the first position, it descends to the second position based on the hoisting device and completes the seal replacement. In this process, after the cylinder block of the hydraulic press is lifted, the sliding device is used to drive the cylinder block to move away from the hydraulic press along the support frame until it reaches the first position, and the hoisting device is used to lower the cylinder block to the second position, so that the position of the cylinder block is far from the hydraulic press, enabling the operator to have a certain operating space in the narrow space, facilitating the operator to unlock the locking mechanism of the cylinder block and complete the replacement of the cylinder block seal, thereby completing the maintenance work of the hydraulic press in the narrow space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 FIG. 9 is a schematic structural diagram of a hydraulic press maintenance device for narrow spaces disclosed in an embodiment of the present disclosure; Figure 2 FIG. 12 is a schematic flowchart of a hydraulic press maintenance method for narrow spaces disclosed in an embodiment of the present disclosure.

[0018] Description of the reference numerals: 1 - Support frame; 11 - Vertical support frame; 12 - Horizontal support frame; 13 - Hoisting frame; 2 - Sliding device; 21 - Slideway; 22 - Translation trolley; 3 - Hoisting device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will further describe in detail the embodiments of the present disclosure in conjunction with the drawings and embodiments. The detailed description and drawings of the following embodiments are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms, not limited to the specific embodiments disclosed herein, but including all technical solutions falling within the scope of the claims.

[0020] These embodiments are provided by the present disclosure to make the present disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the components of materials, numerical expressions and values set forth in these embodiments should be construed as merely exemplary and not as limitations.

[0021] It should be noted that in the description of the present disclosure, unless otherwise specified, the meaning of "a plurality" is greater than or equal to two; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0022] In addition, the "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Words such as "including" or "comprising" mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.

[0023] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and defined, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. When it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0024] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as those, should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0025] Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods and devices should be regarded as part of the specification.

[0026] AsFigure 1 As shown in the figure, the present invention discloses a hydraulic press maintenance device for narrow spaces. The device includes: a support frame 1, a sliding device 2 and a hoisting device 3. The sliding device 2 and the hoisting device 3 are respectively connected to the support frame 1. The support frame 1 passes through both sides of the cylinder block of the hydraulic press. Among them, The lifted cylinder block is respectively connected to the sliding device 2 and the hoisting device 3. The sliding device 2 drives the cylinder block to move away from the hydraulic press along the support frame 1 until the first position; after the cylinder block reaches the first position, the hoisting device 3 is used to lower the cylinder block to the second position and complete the seal replacement.

[0027] Specifically, the cylinder block is usually lifted by using equipment such as a jack to lift the cylinder block of the hydraulic press. Taking the YB32-500T four-column hydraulic press as an example, it is usually lifted by 100 mm. In this embodiment, the lifting method and lifting distance of the cylinder block are not specifically limited and can be set according to the actual working conditions.

[0028] Specifically, the support frame 1 passes through both sides of the cylinder block of the hydraulic press to ensure that when the sliding device 2 slides along the support frame 1, the cylinder block can be driven to the first position. Among them, the sliding device 2 includes: a slideway 21 and a translation trolley 22; or, pulleys used in cooperation with the grooves of the transverse support frame 12, and there is a connecting rod between the pulleys.

[0029] Specifically, the connection between the hoisting device 3 and the cylinder block means that the hoisting device 3 is connected to the cylinder block through a chain or a connecting rope, so that the cylinder block can change its displacement in the vertical ground direction for rising or falling. The connection between the sliding device 2 and the cylinder block means that the sliding device makes contact through clamping or a connecting rod during movement, so that the cylinder block can change its displacement in the direction parallel to the ground for moving away from or approaching the hydraulic press. The hoisting device 3 can be a manual hoist or other hoisting equipment. This embodiment does not specifically limit this and can be set according to the actual working conditions.

[0030] Specifically, the second position refers to the position after the cylinder block moves in the direction perpendicular to the ground, that is, to ensure that after the cylinder block moves, there is a working space for operators, such as seal replacement, in the direction perpendicular to the ground between the cylinder block and the compressor in the narrow space.

[0031] Through the above technical solution, the present disclosure provides a hydraulic press maintenance device and method for narrow spaces. The hydraulic press maintenance device for narrow spaces includes: a support frame, a sliding device, and a hoisting device. The sliding device and the hoisting device are respectively connected to the support frame. The support frame passes through both sides of the cylinder block of the hydraulic press. Among them, the lifted cylinder block is respectively connected to the sliding device and the hoisting device. The sliding device drives the cylinder block to move away from the hydraulic press along the support frame until the first position; after the cylinder block reaches the first position, it descends to the second position based on the hoisting device and completes the seal replacement. In this process, after the cylinder block of the hydraulic press is lifted, the sliding device is used to drive the cylinder block to move away from the hydraulic press along the support frame until the first position, and the hoisting device is used to lower the cylinder block to the second position, so that the position of the cylinder block is far from the hydraulic press, enabling the operator to have a certain operating space in the narrow space, facilitating the operator to unlock the locking mechanism of the cylinder block and complete the replacement of the cylinder block seal, thereby completing the maintenance work of the hydraulic press in the narrow space.

[0032] In some alternative embodiments, the support frame 1 includes: a vertical support frame 11 and a horizontal support frame 12. Among them, the horizontal support frame 12 is connected to the vertical support frame 11, and the horizontal support frame 12 passes through both sides of the cylinder block of the hydraulic press.

[0033] Specifically, as Figure 1 shown, one end of the horizontal support frame 12 and the vertical support frame 11 are usually connected by bolts. This embodiment does not make specific limitations on this, and it can be set according to the actual working conditions. The other end of the horizontal support frame 12 can be connected to a wall, a hydraulic press frame, or other structures. This embodiment does not make specific limitations on this, as long as it can be used to ensure that the sliding device 2 can drive the cylinder block to move along the horizontal support frame 12. The horizontal support frame 12 passes through both sides of the cylinder block of the hydraulic press to ensure that when the sliding device 2 moves along the horizontal support frame 12, it can drive the cylinder block to move.

[0034] In some alternative embodiments, the sliding device 2 includes: a slideway 21 and a translation trolley 22. Among them, the slideway 21 is connected to the horizontal support frame 12, and the translation trolley 22 moves along the horizontal support frame 12 based on the slideway 21.

[0035] Specifically, the slideway 21 and the horizontal support frame 12 are usually connected by bolts, which is convenient for the installation and disassembly between the slideway 21 and the horizontal support frame 12. Thus, after the cylinder block reaches the first position, the slideway 21 is disassembled to provide space for the cylinder block to move to the second position under the action of the hoisting device 3, that is, by disassembling the slide 21, the displacement restriction between the translation trolley 22 and the slideway 21 is released, providing a moving space for the cylinder block in the direction perpendicular to the ground.

[0036] In some alternative embodiments, the outer edge of the lifted cylinder block is clamped to the translation trolley 22, so that the translation trolley 22 drives the cylinder block to move away from the hydraulic press along the transverse support frame 12 until the first position.

[0037] Specifically, the clamping of the outer edge of the lifted cylinder block to the translation trolley 22 may mean that generally the outer edge of the cylinder block has screw holes required for bolt connection with the hydraulic press, and the positions where the screw holes are located usually protrude from the outer edge of the cylinder block. Thus, the protrusion of the outer edge of the cylinder block is used to achieve clamping with the translation trolley 22, and the protrusion of the outer edge of the cylinder block is used to realize the displacement limitation of the translation trolley 22 and the slideway 21 for the cylinder block in the direction perpendicular to the ground.

[0038] Specifically, the clamping of the outer edge of the lifted cylinder block to the translation trolley 22 may also mean that the cylinder block has a locking mechanism, for example: a hydraulic cylinder locking and fixing frame. The translation trolley 22 contacts with the locking mechanism located at the outer edge of the cylinder block to achieve the clamping of the outer edge of the lifted cylinder block to the translation trolley 22. It should be understood that during the process that the hoisting device 3 clamps to the outer edge of the cylinder block and moves the cylinder block along the transverse support frame 12 to the first position, it is connected to the cylinder block only to prevent the cylinder block from falling. The displacement limitation of the cylinder block in the direction perpendicular to the ground is provided by the translation trolley 22 and the slideway 21. Wherein, the first position refers to the position after the cylinder block moves in the direction parallel to the ground, that is, to ensure that after the cylinder block moves, there is an operating space for the operator to perform operations such as seal replacement, etc. in the direction parallel to the ground between the cylinder block and the compressor in a narrow space.

[0039] In some alternative embodiments, the support frame 1 includes a hoisting frame 13. The hoisting frame 13 is connected to the vertical support frame 11, and the hoisting device 3 is arranged on the hoisting frame 13. Wherein, a connecting structure is arranged on the outer peripheral edge of the lifted cylinder block, and the hoisting device 3 is connected to the cylinder block through the connecting structure.

[0040] Specifically, one end of the hoisting frame 13 is usually connected to the vertical support frame 11 by bolts. This embodiment does not make specific limitations on this, and it can be set according to the actual working conditions. The other end of the hoisting frame 13 can be connected to a wall, the vertical support frame 13 or other structures. This embodiment does not make specific limitations on this, as long as it can be used to ensure that the hoisting device 3 uses the hoisting frame 13 to complete the hoisting of the cylinder block. The connecting structure arranged on the outer peripheral edge of the lifted cylinder block includes: using the screw holes required for bolt connection with the hydraulic press on the outer edge, and connecting one end of a connecting rod to the circumferentially opposite positions around the screw holes, with this connecting rod as the connecting structure; or using both ends of the locking mechanism located at the outer edge of the cylinder block as hoisting points respectively, so as to form the connecting structure.

[0041] In some alternative embodiments, the transverse support frame 12 is provided with grooves having the same width and depth respectively. The sliding device 2 includes pulleys that cooperate with the grooves, and the pulleys move along the transverse support frame 12 based on the grooves.

[0042] Specifically, grooves with the same width and depth are used to ensure that when the pulley moves along the transverse support frame 12 through the groove, there is no movement in the direction perpendicular to the ground or in the horizontal ground direction. In some alternative embodiments, there is a connecting rod between the pulleys. When the connecting rod moves along the transverse support frame 12, it contacts the cylinder block, so that under the hoisting of the hoisting device 3, the cylinder block moves along the transverse support frame 12 away from the hydraulic press until the first position.

[0043] Specifically, since the transverse support frame 12 passes through both sides of the cylinder block of the hydraulic press and the pulley moves along the groove of the transverse support frame 12, the connecting rod between the pulleys will contact the cylinder block when moving along the transverse support frame 12. At this time, the connecting rod is used to provide the force for the cylinder block to move in the direction parallel to the ground.

[0044] Specifically, under the hoisting of the hoisting device 3, the cylinder block moves along the transverse support frame 12 away from the hydraulic press until the first position through the connecting rod, which means that the hoisting device 3 is connected to the lifted cylinder block. Through the hoisting of the cylinder block, before the cylinder block reaches the first position, a displacement limit in the direction perpendicular to the ground is provided for the cylinder block, so that the cylinder block reaches the first position through the connecting rod and the hoisting device 3, ensuring that after the cylinder block moves, there is a position for the operator to perform operations such as seal replacement in the direction parallel to the ground in the narrow space with the compressor. It should be understood that since before the cylinder block reaches the first position, the hoisting device 3 provides a displacement limit for the cylinder block in the direction perpendicular to the ground, during this process, there is no need to disassemble the pulley and the connecting rod, thus reducing the workload of the operator. And the slideway 21 and the translation trolley 22 limit the displacement of the cylinder block in the direction perpendicular to the ground by clamping the cylinder block before the cylinder block reaches the first position, making the cylinder block move more smoothly during the movement.

[0045] In some alternative embodiments, the device further includes: Using the hoisting device 3 to lift the cylinder block after the seal replacement to the first position; after the cylinder block after the seal replacement reaches the first position, the sliding device 2 drives the cylinder block along the support frame 1 to the corresponding position of the hydraulic press until the installation of the cylinder block is completed.

[0046] Specifically, after the cylinder block reaches the first position, the sliding device 2 drives the cylinder block along the support frame 1 to the corresponding position of the hydraulic press until the installation of the cylinder block is completed, which means that after the cylinder block reaches the first position, through clamping or connecting rod with the cylinder block, the cylinder block is moved along the support frame 1 to the corresponding position of the hydraulic press, and the cylinder block is lowered to the installation position through equipment such as a jack, so as to complete the installation of the hydraulic press cylinder block. Among them, for specific details, please refer to the relevant descriptions of the above embodiments and will not be elaborated here.

[0047] According to an embodiment of the present invention, a method for repairing a hydraulic press in a narrow space is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0048] This embodiment provides a method for repairing a hydraulic press in a narrow space, such as Figure 2 As shown, the method comprises the following steps: S101, in response to the lifting of the cylinder body of the hydraulic press, the cylinder body is driven to the first position by a sliding device. For details, please refer to the relevant description of the above embodiment, which will not be repeated here.

[0049] S102, in response to the cylinder body reaching the first position, using the hoisting device to lower the cylinder body to the second position and complete the seal replacement. For details, please refer to the relevant description of the above embodiment, which will not be repeated here.

[0050] Through the above technical solution, the present disclosure provides a device and method for repairing a hydraulic press in a narrow space, and the method for repairing a hydraulic press in a narrow space includes: in response to the lifting of the cylinder body of the hydraulic press, the cylinder body is driven to the first position based on the sliding device; in response to the cylinder body reaching the first position, the cylinder body is lowered to the second position based on the hoisting device and the seal replacement is completed. In this process, after the cylinder body of the hydraulic press is lifted, the sliding device is used to drive the cylinder body to move away from the hydraulic press along the support frame until the first position, and the cylinder body is lowered to the second position by the hoisting device, so that the cylinder body is located away from the hydraulic press, so that the operator can have a certain operating space in the narrow space, which is convenient for the operator to unlock the locking mechanism of the cylinder body and complete the replacement of the cylinder body seal, thereby completing the repair work of the hydraulic press in the narrow space.

[0051] In some optional embodiments, the method further includes: In response to the cylinder body completing the seal replacement, the cylinder body is raised to the first position using the lifting device; in response to the cylinder body reaching the first position, the cylinder body is driven to the corresponding position of the hydraulic press using the sliding device until the cylinder body is installed. For details, please refer to the relevant description of the above embodiment, which will not be repeated here.

[0052] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0053] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or equivalent substitutions can be made for some technical features without departing from the scope and spirit of the present disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way.

Claims

1. A hydraulic press maintenance device for narrow spaces, characterized in that, The device includes: a support frame (1), a sliding device (2) and a hoisting device (3). The sliding device (2) and the hoisting device (3) are respectively connected to the support frame (1). The support frame (1) passes through both sides of the cylinder block of the hydraulic press. Among them, After the cylinder block is lifted, it is respectively connected to the sliding device (2) and the hoisting device (3). The sliding device (2) drives the cylinder block to move away from the hydraulic press along the support frame (1) until the first position. After the cylinder block reaches the first position, use the hoisting device (3) to lower the cylinder block to the second position and complete the seal replacement.

2. The device according to claim 1, characterized in that, The support frame (1) includes: a vertical support frame (11) and a horizontal support frame (12). Among them, The horizontal support frame (12) is connected to the vertical support frame (11), and the horizontal support frame (12) passes through both sides of the cylinder block of the hydraulic press.

3. The device according to claim 2, characterized in that, The sliding device (2) includes: a slideway (21) and a translation trolley (22). Among them, The slideway (21) is connected to the horizontal support frame (12), and the translation trolley (22) moves along the horizontal support frame (12) based on the slideway (21).

4. The device according to claim 3, characterized in that, The outer edge of the lifted cylinder block is clamped with the translation trolley (22), so that the translation trolley (22) drives the cylinder block to move away from the hydraulic press along the horizontal support frame (12) until the first position.

5. The device according to claim 2, characterized in that, The support frame (1) includes a hoisting frame (13). The hoisting frame (13) is connected to the vertical support frame (11), and the hoisting device (3) is arranged on the hoisting frame (13). Among them, A connection structure is provided on the outer periphery of the lifted cylinder block, and the hoisting device (3) is connected to the cylinder block through the connection structure.

6. The device according to claim 5, characterized in that, The horizontal support frame (12) is provided with grooves having the same width and depth respectively. The sliding device (2) includes pulleys that cooperate with the grooves, and the pulleys move along the horizontal support frame (12) based on the grooves.

7. The device according to claim 6, characterized in that, A connecting rod is provided between the pulleys. When the connecting rod moves along the horizontal support frame (12), it contacts the cylinder block, so that the cylinder block moves away from the hydraulic press along the horizontal support frame (12) under the hoisting of the hoisting device (3) until the first position.

8. The device according to any one of claims 1 to 7, characterized in that, The device further includes: Use the hoisting device (3) to lift the cylinder block after the seal replacement to the first position. After the cylinder block after the seal replacement reaches the first position, the sliding device (2) drives the cylinder block along the support frame (1) to the corresponding position of the hydraulic press until the installation of the cylinder block is completed.

9. A maintenance method for a hydraulic press used in a narrow space, characterized in that, Applied to the hydraulic press maintenance device for narrow spaces as described in any one of claims 1 to 8, the method includes: In response to the lifting of the hydraulic press cylinder block, use the sliding device to drive the cylinder block to the first position. In response to the cylinder block reaching the first position, use the hoisting device to lower the cylinder block to the second position and complete the seal replacement.

10. The method according to claim 9, wherein The method further includes: In response to the cylinder block completing the seal replacement, use the hoisting device to lift the cylinder block to the first position. In response to the cylinder block reaching the first position, use the sliding device to drive the cylinder block to the corresponding position of the hydraulic press until the installation of the cylinder block is completed.

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