Fixing device for sealing blocks during maintenance

Abstract

The utility model discloses a fixing device for the overhaul and reinstallation of sealing blocks, especially for the overhaul and reinstallation operation of the sealing blocks of the main shaft of a water turbine, which comprises a base, a connecting plate, a push rod, a moving rod, an adjusting rod, a spring rod and a spring. The base comprises a bottom plate, a vertical plate, a sleeve and a pressing plate. The connecting plate and the vertical plate are hingedly connected with the moving rod to form a two-link mechanism. The push rod drives the moving rod to slide along the sleeve. The adjusting rod is connected with the moving rod through threads to adjust the distance. The spring rod cooperates with the spring to realize elastic compression. The utility model can realize the accurate positioning and stable fixing of the sealing blocks and the floating ring, improve the reinstallation efficiency and quality, and ensure the sealing performance of the main shaft of the water turbine.

Description

Technical Field

[0001] This utility model relates to the field of mechanical maintenance technology, specifically a fixing device for the maintenance and reinstallation of sealing blocks. Background Technology

[0002] During the operation of a water turbine, the main shaft seal is a core protective component, and the main shaft seal block, as a key component, needs to be disassembled, inspected, replaced, and precisely reinstalled regularly. However, the installation space for the main shaft seal block is narrow and its position is special. When manually supporting it for reinstallation, it is difficult to accurately control the spatial position and angle of the seal block, which can easily lead to problems such as "misaligned holes" and "warped edges". The positioning is difficult and directly affects the sealing effect.

[0003] Currently, there is a lack of specialized tools, and existing reassembly methods cannot meet the requirements for accuracy and stability, resulting in low reassembly efficiency and difficulty in ensuring quality. Therefore, there is an urgent need for a specialized fixing device with a reasonable structure and simple operation to achieve precise positioning and stable fixing of the spindle sealing block, thus solving the pain points of existing maintenance and reassembly. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a fixing device for the maintenance and reinstallation of sealing blocks. This device can solve the technical problems that occur when the sealing blocks of the turbine main shaft are being maintained and reinstalled. Due to the narrow installation space and the difficulty in accurately controlling the spatial position and angle of the sealing blocks with manual support, "misaligned holes", "warped edges", and high positioning difficulty are common, which also affect the sealing effect.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a fixing device for the maintenance and reinstallation of sealing blocks, including a base, a sleeve on one side of the base, a moving rod passing through the sleeve, a spring rod at one end of the moving rod, and a connecting plate at the other end of the moving rod, forming a two-bar linkage mechanism, and a push rod on the connecting plate.

[0006] In a preferred embodiment, the base includes a base plate, with a vertical plate and a pressure plate at each end of the base plate, and a sleeve on the base plate between the vertical plate and the pressure plate, through which the moving rod passes.

[0007] In a preferred embodiment, the number of vertical plates is at least one, the vertical plates are fixedly connected to the base plate, one end of the connecting plate is hinged to the vertical plate, and the other end is connected to the moving rod.

[0008] In a preferred embodiment, there are two vertical plates, which are symmetrically arranged on both sides of one end of the base plate. Each vertical plate is hinged with a set of connecting plates, and a push rod is connected between the two sets of connecting plates.

[0009] In a preferred embodiment, the push rod is a rod-shaped structure, with its two ends fixedly connected to two sets of connecting plates. Pushing the push rod can cause the two sets of connecting plates to swing synchronously, thereby driving the moving rod to move along the sleeve.

[0010] In a preferred embodiment, the number of sleeves is at least one, the sleeves are fixedly connected to the base plate, and the moving rod is slidably engaged with the inner wall of the sleeve.

[0011] In a preferred embodiment, one end of the moving rod is provided with a threaded post, and the device further includes an adjusting rod. One end of the adjusting rod has an internal thread, and the threaded post and the internal thread cooperate to connect the moving rod and the adjusting rod.

[0012] In a preferred embodiment, a first limiting ring is provided on the inner wall of the end of the adjusting rod away from the moving rod, and one end of the spring rod is inserted into the adjusting rod and passes through the first limiting ring; A second limiting ring is provided on the outer wall of the spring rod, and a spring is sleeved on the spring rod between the first limiting ring and the second limiting ring.

[0013] In a preferred embodiment, the first limiting ring and the second limiting ring are sized to match, and the two ends of the spring abut against the first limiting ring and the second limiting ring, respectively.

[0014] In a preferred embodiment, one end of the spring rod is provided with a pressure plate, and the pressure plate and the pressure plate are aligned longitudinally.

[0015] The fixing device for the maintenance and reinstallation of sealing blocks provided by this utility model has the following beneficial effects by adopting the above structure: (1) This device can effectively avoid the problems of "misaligned holes" and "warping edges" when reinstalling the sealing block of the turbine main shaft. Through structural design, the spatial position and angle of the sealing block are precisely controlled, avoiding the uncertainty of manual support, ensuring that the sealing block is precisely aligned with the installation position, and fundamentally solving the core problem of difficult positioning. (2) The device can form a stable fixation of the sealing block during the reinstallation process, avoid the sealing surface not fitting tightly due to position displacement, ensure the sealing performance of the main shaft seal during subsequent operation, reduce the risk of medium leakage, and ensure the overall reliability of the turbine operation. (3) For scenarios where the installation space of the spindle seal block is narrow and the location is special, the device has a compact structure and is easy to operate. It does not require complicated operation procedures and can operate flexibly in a limited space, greatly reducing the intensity of manual operation and improving the convenience of maintenance and reassembly. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the motion rod, adjustment rod, and spring rod of this utility model.

[0018] Figure 3This is a schematic diagram of the present invention in practical application.

[0019] In the diagram: base 1, base plate 101, vertical plate 102, sleeve 103, pressure plate 104, connecting plate 2, push rod 3, moving rod 4, threaded column 401, adjusting rod 5, internal thread 501, first limiting ring 502, spring rod 6, second limiting ring 601, pressure plate 602, spring 7, sealing block 8, floating ring 9. Detailed Implementation

[0020] like Figure 1-2 In the present invention, a fixing device for the maintenance and reinstallation of a sealing block includes a base 1, a sleeve 103 is provided on one side of the base 1, a moving rod 4 is provided through the sleeve 103, a spring rod 6 is provided at one end of the moving rod 4, and a connecting plate 2 is provided near the other end of the moving rod 4, forming a two-bar linkage mechanism, and a push rod 3 is provided on the connecting plate 2.

[0021] In a preferred embodiment, the base 1 includes a base plate 101, with a vertical plate 102 and a pressure plate 104 respectively at both ends of the base plate 101. A sleeve 103 is provided on the base plate 101 between the vertical plate 102 and the pressure plate 104, and the moving rod 4 passes through the sleeve 103.

[0022] In a preferred embodiment, the number of vertical plates 102 is at least one, the vertical plates 102 are fixedly connected to the base plate 101, one end of the connecting plate 2 is hinged to the vertical plate 102, and the other end is connected to the moving rod 4.

[0023] In a preferred embodiment, there are two vertical plates 102, which are symmetrically arranged on both sides of one end of the base plate 101. Each vertical plate 102 is hinged with a set of connecting plates 2, and the push rod 3 is connected between the two sets of connecting plates 2.

[0024] In a preferred embodiment, the push rod 3 is a rod-shaped structure, and its two ends are fixedly connected to two sets of connecting plates 2 respectively. Pushing the push rod 3 can drive the two sets of connecting plates 2 to swing synchronously, thereby driving the moving rod 4 to move along the sleeve 103.

[0025] In a preferred embodiment, the number of sleeves 103 is at least one, the sleeves 103 are fixedly connected to the base plate 101, and the moving rod 4 is slidably engaged with the inner wall of the sleeves 103.

[0026] In a preferred embodiment, one end of the moving rod 4 is provided with a threaded post 401, and the device also includes an adjusting rod 5. One end of the adjusting rod 5 is provided with an internal thread 501, and the threaded post 401 and the internal thread 501 cooperate to realize the connection between the moving rod 4 and the adjusting rod 5.

[0027] In a preferred embodiment, the inner wall of the end of the adjusting rod 5 away from the moving rod 4 is provided with a first limiting ring 502, and one end of the spring rod 6 is inserted into the adjusting rod 5 and passes through the first limiting ring 502; A second limiting ring 601 is provided on the outer wall of the spring rod 6, and a spring 7 is sleeved on the spring rod 6 between the first limiting ring 502 and the second limiting ring 601.

[0028] In a preferred embodiment, the first limiting ring 502 and the second limiting ring 601 are sized to match, and the two ends of the spring 7 abut against the first limiting ring 502 and the second limiting ring 601 respectively.

[0029] In a preferred embodiment, one end of the spring rod 6 is provided with a pressure plate 602, and the pressure plate 602 is aligned with the pressure plate 104 in the longitudinal direction.

[0030] Combined with appendix Figure 3 The present invention discloses a fixing device for the inspection and reinstallation of sealing blocks, which, during operation: Place the base plate 101 on the support surface of the turbine main shaft sealing block maintenance station, so that the pressure plate 104 fits against one side of the equipment installation groove. Adjust the position of the base plate 101 to ensure that the pressure plate 104 fits tightly against the upper end of the floating ring 9 and that the pressure plate 602 is aligned with the sealing block to be installed.

[0031] Place the overhauled sealing block 8 between the pressure plate 104 and the pressure plate 602 to initially align the mounting holes of the sealing block with the mounting holes of the equipment.

[0032] The operator pushes the push rod 3, causing the connecting plate 2 to swing, which drives the moving rod 4 to move along the sleeve 103 towards the pressure plate 104. The pressure plate 602 gradually approaches the sealing block 8 and applies pressure. During the process, the total length of the moving rod 4 and the adjusting rod 5 can be adjusted by rotating the adjusting rod 5 to precisely control the pressing position of the pressure plate 602 until the mounting hole of the sealing block is completely aligned with the mounting hole of the equipment. At this time, the spring 7 is slightly compressed, and the sealing block is kept stable by the elastic force.

[0033] To keep the device fixed to the sealing block, the operator uses bolts to tighten the sealing block through the mounting holes and the equipment mounting holes. Then, the push rod 3 is pulled in the opposite direction to disengage the pressure plate 602 from the sealing block. The device can then be removed to complete the reinstallation operation.

Claims

1. A fixing device for the maintenance and reinstallation of a sealing block, comprising a base (1), characterized in that: The base (1) has a sleeve (103) on one side, a moving rod (4) is inserted through the sleeve (103), a spring rod (6) is provided at one end of the moving rod (4), and a connecting plate (2) is provided near the other end of the moving rod (4). The connecting plate (2) forms a two-bar linkage mechanism, and a push rod (3) is provided on the connecting plate (2).

2. The fixing device for the maintenance and reinstallation of a sealing block according to claim 1, characterized in that: The base (1) includes a base plate (101), with a vertical plate (102) and a pressure plate (104) respectively at both ends of the base plate (101). A sleeve (103) is provided on the base plate (101) between the vertical plate (102) and the pressure plate (104), and the moving rod (4) passes through the sleeve (103).

3. The fixing device for the maintenance and reinstallation of a sealing block according to claim 2, characterized in that: The number of vertical plates (102) is at least one. The vertical plates (102) are fixedly connected to the base plate (101). One end of the connecting plate (2) is hinged to the vertical plate (102), and the other end is connected to the moving rod (4).

4. The fixing device for the maintenance and reinstallation of a sealing block according to claim 3, characterized in that: There are two vertical plates (102), which are symmetrically arranged on both sides of one end of the base plate (101). Each vertical plate (102) is hinged with a set of connecting plates (2), and the push rod (3) is connected between the two sets of connecting plates (2).

5. The fixing device for the maintenance and reinstallation of a sealing block according to claim 4, characterized in that: The push rod (3) is a rod-shaped structure. The two ends of the push rod (3) are fixedly connected to two sets of connecting plates (2). Pushing the push rod (3) can drive the two sets of connecting plates (2) to swing synchronously to drive the moving rod (4) to move along the sleeve (103).

6. A fixing device for the maintenance and reinstallation of a sealing block according to claim 2, characterized in that: The number of sleeves (103) is at least one. The sleeves (103) are fixedly connected to the base plate (101), and the moving rod (4) slides in cooperation with the inner wall of the sleeves (103).

7. A fixing device for the maintenance and reinstallation of a sealing block according to claim 1, characterized in that: The moving rod (4) has a threaded post (401) at one end. The device also includes an adjusting rod (5). The inner wall of one end of the adjusting rod (5) is provided with an internal thread (501). The threaded post (401) and the internal thread (501) cooperate to realize the connection between the moving rod (4) and the adjusting rod (5).

8. A fixing device for the maintenance and reinstallation of a sealing block according to claim 7, characterized in that: The inner wall of the end of the adjusting rod (5) away from the moving rod (4) is provided with a first limiting ring (502), and one end of the spring rod (6) is inserted into the adjusting rod (5) and passes through the first limiting ring (502). A second limiting ring (601) is provided on the outer wall of the spring rod (6), and a spring (7) is sleeved on the spring rod (6) between the first limiting ring (502) and the second limiting ring (601).

9. A fixing device for the maintenance and reinstallation of a sealing block according to claim 8, characterized in that: The first limiting ring (502) and the second limiting ring (601) are matched in size, and the two ends of the spring (7) abut against the first limiting ring (502) and the second limiting ring (601) respectively.

10. A fixing device for the maintenance and reinstallation of a sealing block according to claim 1, characterized in that: One end of the spring rod (6) is provided with a pressure plate (602), and the pressure plate (602) and the pressure plate (104) are aligned in the longitudinal direction.

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