A heater replacement lifting fixture

Abstract

This utility model discloses a heater replacement lifting fixture, relating to the field of liquid crystal substrate glass production technology. It comprises a ratchet wrench, an intermediate connecting rod, a first threaded rod, a second threaded rod, a first push rod, a second push rod, a push block, bearings, and a retaining ring. The ratchet wrench engages with the intermediate connecting rod, causing the threaded rods to rotate. Because the threads of the threaded rods are opposite in direction, the two push rods move in opposite directions, causing the push block to expand the furnace opening. The push block is equipped with a ball groove, a spring, and a steel ball, ensuring stable contact with the furnace body. This fixture has an ingenious structure, avoiding interference from complex gas pipes and cables on-site. It requires no additional support points, operates stably in high-temperature environments, avoids the problem of traditional tools being damaged by high temperatures, and can quickly expand the furnace opening, reducing the difficulty of heater replacement, improving replacement efficiency, and ensuring orderly production.

Description

Technical Field

[0001] This utility model relates to the field of liquid crystal substrate glass production technology, and in particular to a heater replacement lifting fixture. Background Technology

[0002] As the market share of OLED glass continues to rise, LCD glass manufacturers are facing higher demands. In OLED glass production, the temperature of the forming furnace and annealing furnace increases, significantly increasing the actual power of the heaters inside the furnace, but shortening their lifespan. Some heaters fail prematurely, affecting furnace temperature control and thus reducing the quality and yield of OLED glass production. Timely replacement of damaged heaters is therefore essential.

[0003] However, the replacement work was fraught with difficulties. The heaters in the forming furnace and annealing furnace were installed cold and then heated up for use, with the working surface temperature reaching over 100°C. When removing the fixing screws, due to thermal expansion and contraction, some heaters were tightly fitted to the furnace body and difficult to pull out. Moreover, the on-site working environment was complex, with gas pipes, cables, cable trays, temperature monitoring thermocouples, water pipes, etc., intertwined outside the furnace body, severely interfering with the operating space. Tools such as pry bars lacked suitable fulcrums and could not be effectively used.

[0004] In addition, the traditional method of using jacks with added heat insulation cotton to lift and open the heater mating surface is prone to damage to the jack seals under high temperature baking, resulting in the inability to provide normal support, making the replacement work difficult to carry out, and even posing safety hazards. Utility Model Content

[0005] To address the technical problems existing in the background art, this utility model proposes a heating element replacement lifting fixture.

[0006] This utility model proposes a heater replacement lifting fixture, including a ratchet wrench. An intermediate connecting rod is engaged inside the ratchet head of the ratchet wrench. The two ends of the intermediate connecting rod are respectively connected to a first threaded rod and a second threaded rod with opposite thread directions. The outside of the first threaded rod and the second threaded rod are respectively rotatably connected to a first push rod and a second push rod through threads. The opposite ends of the first push rod and the second push rod are rotatably connected to a top block.

[0007] Furthermore, several locking protrusions are equidistantly connected around the circumference of the intermediate connecting rod. These locking protrusions engage with the grooves on the inner wall of the ratchet head of the ratchet wrench, and the two are compatible.

[0008] Furthermore, slots are provided at the connection points between the intermediate connecting rod and the first threaded rod and the second threaded rod. Snap rings are engaged and fixed inside the slots, and the snap rings abut against the two ends of the ratchet head of the ratchet wrench.

[0009] Furthermore, the inner walls of both the first and second push rods are threaded, and the first and second push rods are threadedly connected to the first and second threaded rods respectively through the internal threads, and the internal threads are adapted to the thread direction of the first and second threaded rods.

[0010] Furthermore, the first push rod and the push block, as well as the second push rod and the push block, are rotatably connected by bearings.

[0011] Furthermore, a ball groove is opened at the top of the top block, and a steel ball is embedded in the opening of the ball groove, with a spring installed inside the ball groove.

[0012] Furthermore, the two ends of the spring abut against the ball groove and the steel ball respectively, and the opening of the ball groove is set in a "C" shape.

[0013] The beneficial effects of this utility model are as follows: By combining a ratchet wrench, a middle connecting rod, a threaded rod, and a top block, the furnace opening can be quickly and accurately expanded. When replacing a damaged heater in an OLED glass production furnace, the spacing of the top blocks can be quickly adjusted to adapt to the furnace opening size, overcoming operational obstacles caused by complex on-site environments. There is no need to find additional support points, and the lifting action can be completed quickly, significantly shortening the time required to replace the heater and improving production efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the disassembled structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the intermediate connecting rod in this utility model;

[0016] Figure 3 This is a schematic diagram of the disassembled structure of the top block in this utility model;

[0017] Figure 4 This is a schematic diagram of the assembly structure of this utility model;

[0018] Figure 5 This is a half-sectional view of the assembled version of this utility model;

[0019] Figure 6 This is a structural diagram of the present invention in use.

[0020] In the diagram: 1. Ratchet wrench; 2. Intermediate connecting rod; 21. Locking protrusion; 22. Locking groove; 3. First threaded rod; 4. Second threaded rod; 5. First push rod; 6. Second push rod; 61. Internal thread; 7. Push block; 71. Ball groove; 72. Spring; 73. Steel ball; 8. Bearing; 9. Snap ring; 10. Furnace body; 11. Heater. Detailed Implementation

[0021] Reference Figure 1-5The present invention proposes a heater replacement lifting fixture, which mainly consists of a ratchet wrench 1, an intermediate connecting rod 2, a first threaded rod 3, a second threaded rod 4, a first push rod 5, a second push rod 6, a push block 7, a bearing 8, and a retaining ring 9, as detailed below:

[0022] The ratchet wrench 1 has a groove structure inside the ratchet head that matches the intermediate connecting rod 2. It should be noted that the specific structure and principle of the ratchet wrench and its inherent ratchet head are existing known technologies and will not be detailed here. Several locking protrusions 21 are evenly spaced around the circumference of the intermediate connecting rod 2. These locking protrusions 21 can engage with the grooves on the inner wall of the ratchet head of the ratchet wrench 1, forming a tight engagement. When the ratchet wrench 1 is rotated, the ratchet wrench 1 drives the intermediate connecting rod 2 to rotate synchronously through this engagement, transmitting the rotational power of the ratchet wrench 1 to the intermediate connecting rod 2, providing the power basis for subsequent lifting actions.

[0023] The two ends of the intermediate connecting rod 2 are connected to the first threaded rod 3 and the second threaded rod 4 respectively. The intermediate connecting rod 2, the first threaded rod 3, and the second threaded rod 4 are a whole, and the thread directions of the first threaded rod 3 and the second threaded rod 4 are opposite. A slot 22 is opened at the connection between the intermediate connecting rod 2 and the first threaded rod 3 and the second threaded rod 4. The retaining spring 9 is engaged and fixed inside the slot 22. The retaining spring 9 abuts against the two ends of the ratchet head of the ratchet wrench 1. Through the engagement of the retaining spring 9 and the slot 22, the vertical position of the intermediate connecting rod 2 in the ratchet head of the ratchet wrench 1 is constrained, ensuring that the intermediate connecting rod 2 will not move axially during rotation, thus ensuring the stability of the tooling structure. At the same time, this engagement method also makes it easy to remove and install the intermediate connecting rod 2 from the inside of the ratchet head of the ratchet wrench 1, thereby facilitating the replacement of the intermediate connecting rod 2, the first threaded rod 3, and the second threaded rod 4 as a whole to meet the needs of different furnace opening sizes.

[0024] Both the first push rod 5 and the second push rod 6 have internal threads 61 on their inner walls. The first push rod 5 is threaded to the first threaded rod 3 through its internal thread 61, and the second push rod 6 is threaded to the second threaded rod 4 through its internal thread 61. Since the threads of the first threaded rod 3 and the second threaded rod 4 are in opposite directions, when the intermediate connecting rod 2 drives the first threaded rod 3 and the second threaded rod 4 to rotate synchronously, the first push rod 5 and the second push rod 6 will move in opposite directions under the action of the threads, thereby increasing or decreasing the distance between the first push rod 5 and the second push rod 6, and thus realizing the lifting or shrinking operation of the furnace opening. In addition, the first push rod 5 and the top block 7, and the second push rod 6 and the top block 7 are rotatably connected by bearings 8.

[0025] A ball groove 71 is opened at the top of the top block 7. A steel ball 73 is embedded in the opening of the ball groove 71. A spring 72 is set inside the ball groove 71. The two ends of the spring 72 abut against the ball groove 71 and the steel ball 73 respectively. The opening of the ball groove 71 is set in a "C" shape. When the top block 7 contacts the furnace body opening, the steel ball 73 will move down under pressure and compress the spring 72, which plays the role of pre-applying clamping force, so that a certain friction force is generated between the top block 7 and the furnace body opening, preventing the top block 7 from slipping during the lifting process. At the same time, the "C" shaped opening design can ensure that the steel ball 73 will not fall off the ball groove 71 when the spring 72 pushes the steel ball 73 outward, thereby ensuring stable contact and effective lifting between the top block 7 and the furnace body opening.

[0026] In use, the operator first manually rotates the first push rod 5 and the second push rod 6 to make initial adjustments based on the opening height of the furnace body 10, so that the height of the fixture is close to the opening height of the furnace body 10. Then, the fixture is placed inside the opening of the furnace body 10, and the ratchet wrench 1 is rotated. Through the structural relationship between the components, power is transmitted to increase the distance between the push blocks 7 until the push blocks 7 are against the opening of the furnace body 10. This state is shown in the attached figure. Figure 6 As shown, the opening of the furnace body 10 is expanded so that the heater 11 is no longer squeezed by the opening of the furnace body 10, and the heater 11 can be pulled out. After pulling it out, a new heater is installed. Finally, the tooling can be removed from the opening of the furnace body 10 by following the same operation as above.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A heater replacement jacking tool, characterized by, Includes a ratchet wrench (1), with an intermediate connecting rod (2) engaged inside the ratchet head of the ratchet wrench (1). The two ends of the intermediate connecting rod (2) are respectively connected to a first threaded rod (3) and a second threaded rod (4) with opposite thread directions. The first threaded rod (3) and the second threaded rod (4) are respectively rotatably connected to a first push rod (5) and a second push rod (6) through threads. The opposite ends of the first push rod (5) and the second push rod (6) are rotatably connected to a top block (7).

2. The replacement heater jacking tool of claim 1, wherein, Several locking protrusions (21) are connected at equal intervals around the middle connecting rod (2). The locking protrusions (21) engage in the grooves on the inner wall of the ratchet head of the ratchet wrench (1), and the two are compatible.

3. The replacement heater jacking tool of claim 1, wherein, The intermediate connecting rod (2) is connected to the first threaded rod (3) and the second threaded rod (4) with slots (22). The slots (22) are fitted with snap rings (9), which abut against the two ends of the ratchet head of the ratchet wrench (1).

4. The replacement heater jacking tool of claim 1, wherein, The inner walls of the first push rod (5) and the second push rod (6) are both provided with internal threads (61). The first push rod (5) and the second push rod (6) are connected to the first threaded rod (3) and the second threaded rod (4) respectively through the internal threads (61), and the internal threads (61) are adapted to the thread direction of the first threaded rod (3) and the second threaded rod (4).

5. The replacement heater jacking tool of claim 1, wherein, The first push rod (5) and the push block (7), and the second push rod (6) and the push block (7) are rotatably connected by bearings (8).

6. The replacement heater jacking tool of claim 1, wherein, A ball groove (71) is opened at the top of the top block (7), and a steel ball (73) is installed in the opening of the ball groove (71). A spring (72) is installed inside the ball groove (71).

7. The heater replacement lifting fixture according to claim 6, characterized in that, The two ends of the spring (72) abut against the ball groove (71) and the steel ball (73) respectively, and the opening of the ball groove (71) is set in the shape of "C".

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