A locking device for the expansion head of a vertical tube expander

Abstract

This utility model discloses a locking device for the expansion heads of a vertical tube expander, relating to the technical field of locking devices. The locking device includes a support plate for supporting multiple expansion head bodies, and an expansion rod frame connected to the main frame of the vertical tube expander and supporting multiple expansion rods on the upper part of the support plate. A connecting mechanism is provided between the expansion rod frame and the support plate. This device changes the traditional method of separately assembling and locking multiple expansion heads. It integrates multiple expansion heads through the support plate, and combines components such as a support frame, threaded posts, bolts, sliding plates, fixing screws, limiting sleeves, limiting posts, and trapezoidal blocks to achieve a limiting combination of multiple expansion heads and the expansion rod frame. This reduces the possibility of multiple expansion heads detaching from the expansion rods due to factors such as different torques, ensuring stable operation of the expansion heads.

Description

Technical Field

[0001] This utility model relates to the field of locking device technology, specifically a locking device for the expansion head of a vertical tube expander. Background Technology

[0002] Vertical tube expanders are mainly used to tightly connect heat exchange tubes in equipment such as heat exchangers, condensers, and evaporators to tube sheets. The expansion rod of the vertical tube expander is equipped with an expansion head at the bottom. By driving the expansion head to move, the expansion head is inserted into the tube body, and the tube diameter increases with the movement of the expansion head. This achieves an interference fit between the outer wall of the tube body and the inner wall of the hole on the cooling fin, thereby ensuring the heat exchange efficiency between the cooling tube and the cooling fin.

[0003] Traditionally, the expansion head and expansion rod are locked together using threaded connections. However, vertical tube expanders have multiple expansion rods, requiring a tube expander to be installed sequentially at the bottom of each rod. This process must be done separately and in sequence. Furthermore, the threaded locking method results in varying torques when each tube expander is connected to the expansion rod. Insufficient thread preload can lead to loosening between the tube expander and expansion rod under vibration or repeated loads, potentially causing the tube expander to detach. To address these shortcomings, we propose a tube expander locking device for vertical tube expanders. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a locking device for the expansion head of a vertical tube expander, which solves the problem that with threaded locking methods, different torques may occur when each expansion head is connected to the expansion rod. When the thread preload is insufficient, the expansion head and expansion rod are prone to loosening under vibration or repeated loads of the vertical tube expander.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a locking device for the expansion head of a vertical tube expander, comprising a support plate for supporting multiple expansion head bodies, an expansion rod frame connected to the main frame of the vertical tube expander and used to support multiple expansion rods on the upper part of the support plate, and a connecting mechanism between the expansion rod frame and the support plate, the connecting mechanism comprising:

[0006] A threaded column is fixedly installed on the bottom surface of the expansion rod frame. The outer wall of the threaded column is fitted with a support frame for supporting the support plate. One end of the threaded column is threaded with a bolt for locking the support plate and the threaded column.

[0007] A sliding groove is formed on the inner wall of the support frame. A sliding plate that is slidably connected to the side of the support plate is fixedly connected to the sliding groove. A fixing screw for locking the support plate and the support frame is provided at one end of the support plate.

[0008] Preferably, a limiting component is provided between the expansion rod frame and the support frame, and the limiting component is used to prevent the support frame and the expansion rod frame from detaching.

[0009] Preferably, the limiting component includes a limiting post fixedly disposed on the top surface of the support frame, a limiting sleeve fixedly disposed on the bottom surface of the expansion rod frame and sleeved on the outer wall of the limiting post, a through hole opened on the outer wall of the limiting post, a connecting box fixedly disposed on the outer wall of the limiting sleeve, and a combined trapezoidal block, a connecting rod, and a spring disposed inside the connecting box for preventing the limiting post and the limiting sleeve from detaching.

[0010] Preferably, the limiting sleeve has a fixing hole near the inner wall of the connecting box, and one end of the trapezoidal block is inserted into the through hole through the fixing hole.

[0011] Preferably, a limiting plate is fixedly connected to the end of the connecting rod away from the trapezoidal block, the limiting plate slides within the connecting box, and the two ends of the spring abut against the limiting plate and one side of the trapezoidal block, respectively.

[0012] Preferably, a control screw is fixedly connected to the side of the limiting plate away from the connecting rod, and a positioning block is fixedly connected to the end of the control screw that extends to the outside of the connecting box.

[0013] Preferably, a nut is threaded onto one end of the control screw that extends outside the connecting box.

[0014] Preferably, the inner wall of the limiting sleeve is fixedly connected to a guide plate, and the outer wall of the limiting post is provided with a guide groove that matches the guide plate.

[0015] Preferably, an L-shaped plate is fixedly connected to the top surface of the support frame, and one end of the L-shaped plate is sleeved on the outer wall of the threaded column.

[0016] Preferably, one end of the support plate is fixedly connected to an end plate for positioning and assembling the support plate and the support frame, and the end plate is fixedly connected to the support frame by a fixing screw.

[0017] This utility model discloses a locking device for the expansion head of a vertical tube expander, which has the following beneficial effects: This locking device for the expansion head of a vertical tube expander changes the traditional method of separately assembling and locking multiple expansion heads. It integrates multiple expansion heads into one unit through a support plate, and combines components such as a support frame, threaded column, bolt, sliding plate, fixing screw, limit sleeve, limit column, and trapezoidal block to complete the limiting combination of multiple expansion heads and expansion rod frame. This reduces the occurrence of multiple expansion heads detaching from the expansion rod due to factors such as different torques, and ensures that the expansion head can operate stably. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the connection structure between the expansion head body and the expansion rod frame of this utility model;

[0021] Figure 3 This is an exploded view of the expansion head body and expansion rod frame structure of this utility model;

[0022] Figure 4 This is an exploded view of the expansion head body and support frame structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the connection structure between the support frame and the limiting post of this utility model;

[0024] Figure 6 This is a schematic diagram of the connection structure between the expansion rod frame and the limiting sleeve of this utility model;

[0025] Figure 7 This is a plan view of the combined structure of the limiting sleeve and the limiting post of this utility model.

[0026] In the diagram: 1. Expander head body; 2. Support plate; 3. Expansion rod frame; 4. Connecting mechanism; 41. Threaded post; 42. Support frame; 43. L-shaped plate; 44. Bolt; 45. Slide groove; 46. Slide plate; 47. End plate; 48. Fixing screw; 5. Limiting assembly; 51. Limiting post; 52. Limiting sleeve; 53. Through hole; 54. Trapezoidal block; 55. Connecting box; 56. Connecting rod; 57. Limiting plate; 58. Spring; 59. Control screw. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] This application provides a locking device for the expansion head of a vertical tube expander, which solves the problem that when each expansion head is connected to the expansion rod, the torque may vary, and when the thread preload is insufficient, the expansion head and expansion rod may loosen under vibration or repeated load of the vertical tube expander. This device achieves integrated assembly and locking of multiple expansion heads.

[0029] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0030] This utility model discloses a locking device for the expansion head of a vertical tube expander.

[0031] According to the appendix Figures 1 to 7 As shown, it includes a support plate 2 for supporting multiple tube expander bodies 1. The upper part of the support plate 2 is provided with an expansion rod frame 3 connected to the main frame of the vertical tube expander and for supporting multiple expansion rods. Multiple tube expander bodies 1 are fixedly connected to the support plate 2 by welding or other means, so that they form an integrated component. This improves the installation efficiency when installing the integrated component with the expansion rod frame 3, and avoids the situation where the torque of multiple tube expander bodies 1 and multiple expansion rods is different, which would affect the processing accuracy of the tube expander bodies 1.

[0032] See attached document Figures 2 to 7 A connecting mechanism 4 is provided between the expansion rod frame 3 and the support plate 2. Through the connecting mechanism 4, the integrated component can be connected to the expansion rod frame 3. The connecting mechanism 4 includes threaded posts 41. Four threaded posts 41 are fixedly set at the four corners of the bottom surface of the expansion rod frame 3. The outer wall of the threaded posts 41 is fitted with a support frame 42 for supporting the support plate 2. That is, the top surface of the support frame 42 is fixedly connected with an L-shaped plate 43. One end of the L-shaped plate 43 is fitted on the outer wall of the threaded post 41. One end of the threaded post 41 is threaded with a bolt 44 for locking between the support plate 2 and the threaded post 41.

[0033] See attached document Figures 4 to 5 The slide groove 45 is formed on the inner wall of the support frame 42. The side of the support plate 2 is fixedly connected to the slide plate 46 which is slidably connected to the slide groove 45. One end of the support plate 2 is provided with a fixing screw 48 for locking between the support plate 2 and the support frame 42. One end of the support plate 2 is fixedly connected to an end plate 47 for positioning and assembling the support plate 2 and the support frame 42. The end plate 47 is fixedly connected to the support frame 42 through the fixing screw 48.

[0034] See attached document Figures 3 to 7A limiting component 5 is provided between the expansion rod frame 3 and the support frame 42. The limiting component 5 is used to prevent the support frame 42 and the expansion rod frame 3 from detaching. That is, when replacing the integrated component installed at the support frame 42, the support frame 42 and the expansion rod frame 3 are always connected through the limiting component 5. The limiting component 5 includes a limiting post 51 fixedly installed on the top surface of the support frame 42, a limiting sleeve 52 fixedly installed on the bottom surface of the expansion rod frame 3 and sleeved on the outer wall of the limiting post 51, a through hole 53 opened on the outer wall of the limiting post 51, a connecting box 55 fixedly installed on the outer wall of the limiting sleeve 52, and a combination of the limiting post 51 and the limiting sleeve 52 installed inside the connecting box 55 to prevent detachment. The trapezoidal block 54, the connecting rod 56, and the spring 58 are arranged as follows: one end of the connecting rod 56 is fixedly connected to one side of the trapezoidal block 54; the spring 58 is sleeved on the outer wall of the connecting rod 56; a guide plate is fixedly connected to the inner wall of the limiting sleeve 52; a guide groove adapted to the guide plate is opened on the outer wall of the limiting post 51; a fixing hole is opened on the inner wall of the limiting sleeve 52 near the connecting box 55; one end of the trapezoidal block 54 is inserted into the through hole 53 through the fixing hole; a limiting plate 57 is fixedly connected to the end of the connecting rod 56 away from the trapezoidal block 54; the limiting plate 57 slides within the connecting box 55; and the two ends of the spring 58 abut against the limiting plate 57 and one side of the trapezoidal block 54, respectively.

[0035] See attached document Figure 7 A control screw 59 is fixedly connected to the side of the limiting plate 57 away from the connecting rod 56. A positioning block is fixedly connected to one end of the control screw 59 that extends to the outside of the connecting box 55. A nut is threaded onto the other end of the control screw 59 that extends to the outside of the connecting box 55, so that the setting position of the trapezoidal block 54 relative to the limiting post 51 can be controlled.

[0036] Specifically, firstly, the limiting post 51 set on the top surface of the support frame 42 is inserted into the limiting sleeve 52 set on the bottom surface of the expansion rod frame 3. At this time, the two sets of trapezoidal blocks 54 set inside the limiting sleeve 52 can be inserted into the through hole 53 opened on the side of the limiting post 51 with the assistance of the spring 58, so as to initially combine the limiting sleeve 52 and the limiting post 51. Then, the control screw 59 fixedly connected to the trapezoidal block 54 by the connecting rod 56 and the connecting box 55 is fixed by the nut to prevent the trapezoidal block 54 from retracting into the connecting box 55. At the same time, when the limiting post 51 is inserted into the limiting sleeve 52, the L-shaped plate 43 set on the top surface of the support frame 42 is sleeved on the outer wall of the threaded post 41 set on the bottom surface of the expansion rod frame 3.

[0037] Next, the support plate 2, which is installed with the number and position of the expansion rods, is inserted into the groove 45 opened inside the support frame 42 through the sliding plate 46 until the end plate 47 on one side of the support plate 2 abuts against the side of the support frame 42. At this time, the combination between the support plate 2 and the support frame 42 is completed, and then the support plate 2 and the support frame 42 are fixed by the fixing screw 48.

[0038] Finally, with the assistance of the limiting post 51 and the limiting sleeve 52 in the limiting connection, the combined support frame 42 and the support plate 2 are moved closer to the expansion rod frame 3, so that the end of the expansion tube head body 1 on the support plate 2 located on the upper part of the support plate 2 is sleeved on the outer wall of the expansion rod frame 3, thereby completing the combination of the expansion tube head body 1 and the bottom expansion rod of the expansion rod frame 3. Subsequently, the bolt 44 is sleeved on the outer wall of the threaded post 41 to fix the L-shaped plate 43 and the threaded post 41. See the attached document for details. Figure 7 This locks the expansion tube head body 1 and the bottom expansion rod of the expansion rod frame 3 in a locked state.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A locking device for the expansion head of a vertical tube expander, characterized in that, The system includes a support plate (2) for supporting multiple tube expander heads (1), and an expansion rod frame (3) connected to the main frame of the vertical tube expander and used to support multiple expansion rods on the upper part of the support plate (2). A connecting mechanism (4) is provided between the expansion rod frame (3) and the support plate (2). The connecting mechanism (4) includes: A threaded column (41) is fixedly installed on the bottom surface of the expansion rod frame (3). The outer wall of the threaded column (41) is fitted with a support frame (42) for supporting the support plate (2). One end of the threaded column (41) is threaded with a bolt (44) for locking between the support plate (2) and the threaded column (41). A sliding groove (45) is provided on the inner wall of the support frame (42). A sliding plate (46) that is slidably connected to the side of the support plate (2) is fixedly connected to the sliding groove (45). A fixing screw (48) for locking the support plate (2) and the support frame (42) is provided at one end of the support plate (2).

2. The tube expansion head locking device for a vertical tube expander according to claim 1, characterized in that: A limiting component (5) is provided between the expansion rod frame (3) and the support frame (42), and the limiting component (5) is used to prevent the support frame (42) and the expansion rod frame (3) from detaching.

3. The tube expansion head locking device for a vertical tube expander according to claim 2, characterized in that: The limiting component (5) includes a limiting post (51) fixedly installed on the top surface of the support frame (42), a limiting sleeve (52) fixedly installed on the bottom surface of the expansion rod frame (3) and sleeved on the outer wall of the limiting post (51), a through hole (53) opened on the outer wall of the limiting post (51), a connecting box (55) fixedly installed on the outer wall of the limiting sleeve (52), and a combined trapezoidal block (54), a connecting rod (56), and a spring (58) installed inside the connecting box (55) to prevent the limiting post (51) and the limiting sleeve (52) from detaching.

4. The tube expansion head locking device for a vertical tube expander according to claim 3, characterized in that: The limiting sleeve (52) has a fixing hole on the inner wall near the connecting box (55), and one end of the trapezoidal block (54) is inserted into the through hole (53) through the fixing hole.

5. The tube expander head locking device of a vertical tube expander according to claim 4, characterized in that: The end of the connecting rod (56) away from the trapezoidal block (54) is fixedly connected to a limiting plate (57), the limiting plate (57) slides within the connecting box (55), and the two ends of the spring (58) abut against the limiting plate (57) and one side of the trapezoidal block (54) respectively.

6. The tube expansion head locking device for a vertical tube expander according to claim 5, characterized in that: A control screw (59) is fixedly connected to the side of the limiting plate (57) away from the connecting rod (56), and a positioning block is fixedly connected to one end of the control screw (59) extending to the outside of the connecting box (55).

7. A locking device for the tube expansion head of a vertical tube expander according to claim 6, characterized in that: The control screw (59) extends to one end outside the connecting box (55) and is threaded with a nut.

8. The tube expansion head locking device for a vertical tube expander according to claim 3, characterized in that: The inner wall of the limiting sleeve (52) is fixedly connected to a guide plate, and the outer wall of the limiting post (51) is provided with a guide groove that matches the guide plate.

9. A locking device for the tube expansion head of a vertical tube expander according to claim 1, characterized in that: An L-shaped plate (43) is fixedly connected to the top surface of the support frame (42), and one end of the L-shaped plate (43) is sleeved on the outer wall of the threaded column (41).

10. A locking device for the tube expansion head of a vertical tube expander according to claim 1, characterized in that: One end of the support plate (2) is fixedly connected to an end plate (47) for positioning and assembling the support plate (2) and the support frame (42). The end plate (47) is fixedly connected to the support frame (42) by a fixing screw (48).

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