Turbine bearing pedestal pin extraction device
By designing a turbine bearing seat pin extraction device with a fixed plate and a limiting mechanism, the problems of difficult pin disassembly and safety hazards have been solved, achieving efficient and safe pin extraction and adapting to the needs of pins of different specifications.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZOUPING HONGLI THERMAL POWER CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-06-09
AI Technical Summary
The existing turbine bearing housing pins are difficult to disassemble, and using traditional tools can easily damage the tools and create safety hazards.
A turbine bearing seat pin removal device was designed, comprising a fixed plate, a connecting mechanism, and a limiting mechanism. The device uses inertia to remove the pin through the cooperation of the protective plate, connecting rod, fixed column, and handle, and the limiting mechanism ensures the stability and safety of the device.
It improves the efficiency of pin removal, reduces manpower consumption, reduces component wear, enhances safety, adapts to the need for pulling out pins of different specifications, and extends the service life of the device.
Smart Images
Figure CN224334379U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of pins for bearing housings of steam turbine equipment, specifically a device for removing pins from steam turbine bearing housings. Background Technology
[0002] The pins of the bearing housings of steam turbine equipment are installed on their respective bearing housings. Because the pins have no external screws, only an internal thread at the top, and are prone to rust due to long-term inactivity, disassembly is quite difficult. Removing the bearing housing pins during major and minor overhauls is always a major challenge. Sometimes, tools such as sledgehammers, wrenches, bolts, and chain hoists may be used. When using appropriate bolts to rotate the pin to make it easier to pull out, the bolt may break due to excessive torque. Then, a thread extractor is used to remove the broken bolt, increasing the workload. Even if the pin is removed successfully, using a sledgehammer can easily cause injury or other safety hazards, posing a significant safety risk to equipment maintenance.
[0003] According to the description in the patent application published on the Internet, a hammer-type pin-pulling device for equipment maintenance (authorization announcement number: CN220179223U) includes a "handle, hammer, connector" etc., to realize the pin-pulling work.
[0004] Regarding the above description, the applicant believes the following issues exist:
[0005] The maintenance device uses a hammer-type pin-pulling device, which employs a handle, hammer, and connector to pull pins. During use, a suitable connector is selected based on the pin's condition. After selection, the connector is connected to the pin, and the connector is threaded to the support rod. Frequent connector replacement can cause wear and stripping of the threaded hole, affecting the stability of the pin-pulling operation. Furthermore, the lack of an auxiliary force-applying structure around the hammer affects the force application during pin pulling. Therefore, improvements to this device are necessary. Utility Model Content
[0006] The purpose of this invention is to provide a device for pulling out the pins of a steam turbine bearing housing, so as to solve the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution: a turbine bearing seat pin removal device, including a fixing plate, a connecting mechanism at the bottom of the fixing plate, and a limit mechanism on the inner side of the connecting mechanism;
[0008] The connecting mechanism includes a protective plate, which is fixedly connected to the bottom of a fixed plate. A connecting rod is fixedly connected to the bottom of the protective plate. A fixed post is inserted around the connecting rod. A connecting sleeve is fixedly connected to the bottom of the protective plate. The connecting sleeve is slidably connected to the periphery of the fixed post. A sleeve is slidably connected to the periphery of the fixed post. A handle is fixedly connected to the periphery of the sleeve. A mounting base is inserted inside the fixed post. A bolt is fixed to the bottom of the mounting base. A connecting frame is fixedly connected to the periphery of the fixed post. A fixed rod is slidably connected inside the connecting frame. A pull ring is fixedly connected to the right side of the fixed rod. A limit rod is fixedly connected to the left side of the fixed rod. The left side of the limit rod is inserted into the mounting base. A first spring is sleeved around the periphery of the fixed rod.
[0009] Preferably, the left side of the first spring is fixedly connected to the right side of the limiting rod, and the right side of the first spring is fixedly connected to the inner side of the connecting frame, so as to ensure the stability of the limiting rod under the action of the first spring.
[0010] Preferably, the left side of the limiting rod extends through the interior of the fixing column, and the fixing column and the mounting base are respectively provided with slots, and the two slots correspond to each other. The left side of the limiting rod is inserted into the slot, which facilitates the limiting of the mounting base under the action of the limiting rod.
[0011] Preferably, the top and bottom of the sleeve are in contact with the bottom of the connecting sleeve and the top of the connecting frame, respectively, and rubber pads are provided at the top and bottom of the sleeve to protect the sleeve.
[0012] Preferably, the fixing column has an internal mounting groove, and the mounting seat is inserted into the mounting groove, which facilitates the installation of the mounting seat under the action of the mounting groove.
[0013] Preferably, the limiting mechanism includes a support block, which is fixedly connected to the bottom of the protective plate. A rod is slidably connected inside the support block. The front side of the rod is inserted into the inside of the connecting rod. A handle is fixedly connected to the rear side of the rod. A second spring is sleeved around the rod. The front side of the second spring is fixedly connected to the rear side of the support block, and the rear side of the second spring is fixedly connected to the front side of the handle.
[0014] Preferably, the front side of the insertion rod extends through the interior of the fixing post, and the fixing post and the connecting rod are respectively provided with fixing grooves, and the two fixing grooves correspond to each other. The front side of the insertion rod is inserted into the fixing groove, which facilitates the limiting of the connecting rod under the action of the insertion rod and ensures the stability of the protective plate.
[0015] Compared with the prior art, this utility model provides a turbine bearing housing pin removal device, which has the following advantages:
[0016] 1. This turbine bearing housing pin removal device, through a set connecting mechanism and the cooperation of components such as a protective plate, connecting rod, fixing column, and connecting sleeve, can securely connect the device to the turbine bearing housing. The mounting base is connected to the fixing column by fixing bolts, facilitating disassembly and installation. The design of the handle and sleeve allows the operator to pull out the pin by striking the top connecting sleeve and protective plate from bottom to top, using inertia to pull the pin out, greatly saving manpower and improving work efficiency. At the same time, the pull ring, limit rod, and fixing rod can limit the mounting base, ensuring the stability of the mounting base and bolts. This device allows for easy replacement of bolts based on the size of the turbine bearing housing pins, enabling the removal of pins of different specifications and improving performance. Rubber pads at the top and bottom of the sleeve provide cushioning and anti-slip properties during operation, reducing wear between components and extending the device's lifespan. The entire device features a simple structure, quick installation, and convenient use. Most importantly, it solves the problem of injuries caused by using sledgehammers, wrenches, bolts, and hand-operated hoists when removing pins, freeing up labor, increasing safety during operation, and improving work efficiency.
[0017] 2. This turbine bearing seat pin removal device, through a limiting mechanism and components such as a support block, insert rod, and second spring, can precisely fix the connecting rod after the device is installed in place, preventing displacement of the connecting sleeve and protective plate during the pin removal process due to the impact of the sleeve from bottom to top, thus ensuring the stability and reliability of the operation and the stability during the removal process. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0020] Figure 2 This is a schematic diagram of the connecting mechanism.
[0021] Figure 3 This is a schematic diagram of the sectional structure of the fixed column;
[0022] Figure 4 This is a schematic diagram of the external structure of the fixed column;
[0023] Figure 5 This is a schematic diagram of the limiting mechanism.
[0024] In the diagram: 1. Fixing plate; 2. Connecting mechanism; 3. Limiting mechanism; 21. Protective plate; 22. Connecting rod; 23. Fixing column; 24. Sleeve; 25. Handle; 26. Connecting frame; 27. Mounting base; 28. Bolt; 29. Fixing rod; 291. Pull ring; 292. First spring; 293. Limiting rod; 294. Connecting sleeve; 31. Support block; 32. Insert rod; 33. Second spring; 34. Handle. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0027] This utility model provides the following technical solution:
[0028] Example 1
[0029] Please see Figures 1-5 This utility model provides a technical solution: a turbine bearing seat pin removal device, including a fixing plate 1, a connecting mechanism 2 at the bottom of the fixing plate 1, and a limit mechanism 3 on the inner side of the connecting mechanism 2;
[0030] The connecting mechanism 2 includes a protective plate 21, which is fixedly connected to the bottom of the fixed plate 1. A connecting rod 22 is fixedly connected to the bottom of the protective plate 21. A fixed post 23 is inserted around the connecting rod 22. A connecting sleeve 294 is fixedly connected to the bottom of the protective plate 21. The connecting sleeve 294 is slidably connected to the periphery of the fixed post 23. A sleeve 24 is slidably connected to the periphery of the fixed post 23. A handle 25 is fixedly connected to the periphery of the sleeve 24. A mounting base 27 is inserted inside the fixed post 23. A fixing bolt 28 is fixed at the bottom of the mounting base 27. A connecting frame 26 is fixedly connected to the periphery of the fixed post 23. A fixed rod 29 is slidably connected inside the connecting frame 26. A pull ring 291 is fixedly connected to the right side of the fixed rod 29. A limit rod 293 is fixedly connected to the left side of the fixed rod 29. The left side of the limit rod 293 is inserted into the interior of the mounting base 27. A first spring 292 is sleeved around the periphery of the fixed rod 29.
[0031] The left side of the first spring 292 is fixedly connected to the right side of the limiting rod 293, and the right side of the first spring 292 is fixedly connected to the inside of the connecting frame 26, so as to ensure the stability of the limiting rod 293 under the action of the first spring 292. The left side of the limiting rod 293 passes through the inside of the fixing post 23. The fixing post 23 and the mounting base 27 are respectively provided with slots, and the two slots correspond to each other. The left side of the limiting rod 293 is inserted into the slot, so as to limit the mounting base 27 under the action of the limiting rod 293. The top and bottom of the sleeve 24 are in contact with the bottom of the connecting sleeve 294 and the top of the connecting frame 26, respectively. The top and bottom of the sleeve 24 are respectively provided with rubber pads, so as to protect the sleeve 24 under the action of the rubber pads. The fixing post 23 is provided with an installation groove, and the mounting base 27 is inserted into the installation groove, so as to install the mounting base 27 under the action of the installation groove.
[0032] Example 2
[0033] Please see Figures 1-5 Furthermore, based on Embodiment 1, the limiting mechanism 3 further includes a support block 31, which is fixedly connected to the bottom of the protective plate 21. A rod 32 is slidably connected inside the support block 31. The front side of the rod 32 is inserted into the interior of the connecting rod 22, and a handle 34 is fixedly connected to the rear side of the rod 32. A second spring 33 is sleeved around the rod 32. The front side of the second spring 33 is fixedly connected to the rear side of the support block 31, and the rear side of the second spring 33 is fixedly connected to the front side of the handle 34. The front side of the rod 32 passes through the interior of the fixing post 23. Fixing grooves are respectively opened inside the fixing post 23 and the connecting rod 22, and the two fixing grooves correspond to each other. The front side of the rod 32 is inserted into the fixing groove, which facilitates the limiting of the connecting rod 22 under the action of the rod 32, ensuring the stability of the protective plate 21.
[0034] In actual operation, when this device is used and it is necessary to remove the turbine bearing housing pin, first, according to the size of the pin, pull the pull ring 291 to the right, so that the pull ring 291 drives the fixed rod 29 and the limiting rod 293 to move, and the first spring 292 deforms. According to the size of the pin, select the appropriate bolt 28, and insert the mounting base 27 into the fixed column 23. When the insertion is completed, release the pull ring 291, the first spring 292 returns to its original position, and the fixed rod 29 and the limiting rod 293 can move to the left, and the left side of the limiting rod 293 is inserted into the mounting base 27, so that the bolt 28 is in a stable state.
[0035] Pull the handle 34 to the rear to move the insertion rod 32 and deform the second spring 33, inserting the connecting rod 22 into the fixed post 23 and sliding the connecting sleeve 294 to the outside of the fixed post 23. Release the handle 34, and the second spring 33 will return to its original position, allowing the insertion rod 32 to be inserted into the connecting rod 22 and the connecting rod 22 to be in a stable state.
[0036] At this point, the bolt 28 can be screwed into the internal thread at the top of the pin. After tightening, grasp the handle 25 on the outside of the sleeve 24 and strike the connecting sleeve 294 and the protective plate 21 from bottom to top, using inertia to pull the pin out.
[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
Claims
1. A turbine bearing housing pin removal device, comprising a fixing plate (1), characterized in that: The bottom of the fixed plate (1) is provided with a connecting mechanism (2), and the inner side of the connecting mechanism (2) is provided with a limiting mechanism (3); The connecting mechanism (2) includes a protective plate (21), which is fixedly connected to the bottom of a fixed plate (1). A connecting rod (22) is fixedly connected to the bottom of the protective plate (21). A fixed post (23) is inserted around the connecting rod (22). A connecting sleeve (294) is fixedly connected to the bottom of the protective plate (21). The connecting sleeve (294) is slidably connected to the periphery of the fixed post (23). A sleeve (24) is slidably connected to the periphery of the fixed post (23). A handle (25) is fixedly connected to the periphery of the sleeve (24). A mounting base (27) is inserted inside the fixed column (23). The bottom of the mounting base (27) is fixed with a bolt (28). A connecting frame (26) is fixedly connected to the periphery of the fixed column (23). A fixed rod (29) is slidably connected inside the connecting frame (26). A pull ring (291) is fixedly connected to the right side of the fixed rod (29). A limit rod (293) is fixedly connected to the left side of the fixed rod (29). The left side of the limit rod (293) is inserted into the mounting base (27). A first spring (292) is sleeved around the periphery of the fixed rod (29).
2. The turbine bearing housing pin removal device according to claim 1, characterized in that: The left side of the first spring (292) is fixedly connected to the right side of the limiting rod (293), and the right side of the first spring (292) is fixedly connected to the inside of the connecting frame (26).
3. The turbine bearing housing pin removal device according to claim 1, characterized in that: The left side of the limiting rod (293) passes through the inside of the fixing post (23). The fixing post (23) and the mounting base (27) are respectively provided with slots, and the two slots correspond to each other. The left side of the limiting rod (293) is inserted into the slot.
4. The turbine bearing housing pin removal device according to claim 1, characterized in that: The top and bottom of the sleeve (24) are in contact with the bottom of the connecting sleeve (294) and the top of the connecting frame (26), respectively, and rubber pads are provided on the top and bottom of the sleeve (24).
5. The turbine bearing housing pin removal device according to claim 1, characterized in that: The fixed column (23) has an installation groove inside, and the mounting seat (27) is inserted into the installation groove.
6. The turbine bearing housing pin removal device according to claim 1, characterized in that: The limiting mechanism (3) includes a support block (31), which is fixedly connected to the bottom of the protective plate (21). A rod (32) is slidably connected inside the support block (31). The front side of the rod (32) is inserted into the inside of the connecting rod (22). A handle (34) is fixedly connected to the rear side of the rod (32). A second spring (33) is sleeved around the outside of the rod (32). The front side of the second spring (33) is fixedly connected to the rear side of the support block (31), and the rear side of the second spring (33) is fixedly connected to the front side of the handle (34).
7. The turbine bearing housing pin removal device according to claim 6, characterized in that: The front side of the insertion rod (32) passes through the interior of the fixing post (23). The fixing post (23) and the connecting rod (22) are respectively provided with fixing grooves, and the two fixing grooves correspond to each other. The front side of the insertion rod (32) is inserted into the fixing groove.