A new type of heat recovery coke oven coke pushing car pushing rod connecting device
By using an inner box to connect the push rod to the push rod in the coke pusher car of the heat recovery coke oven, the problem of easy cracking of the weld connection was solved, and the stability and service life of the push rod were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN SANGANG MINGUANG
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-07
AI Technical Summary
The existing coke pusher rods of heat recovery coke ovens are prone to cracking due to the weld joints, which leads to problems such as sagging of the pusher head and weld disconnection caused by thermal stress, affecting work efficiency and service life.
The inner box body is connected to the first and second sections of the coke pusher rod via bushings and pins, maintaining a certain gap, thus replacing the welded connection and avoiding deformation and weld cracking caused by thermal expansion and contraction.
This prevents the coke pusher head from sagging and the weld from discontinuing, extends the service life of the coke pusher rod, and reduces maintenance costs.
Smart Images
Figure CN224467720U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field, specifically to a novel coke pusher rod connecting device for a heat recovery coke oven pusher car. Background Technology
[0002] The coke pusher of the coke pusher car in the heat recovery coke oven is a key piece of equipment for pushing red coke out of the coke oven. It consists of a series of structural components. Generally speaking, the coke pusher consists of a pusher rod section I (front section) and a pusher rod section II (rear section). The pusher head is installed at the end of the pusher rod section I that is away from the pusher rod section II. The pusher rod section I and the pusher rod section II are connected by an inner box.
[0003] In existing technologies, the inner box and the first section of the pusher rod are typically connected by welds. Because the pusher rod of the coke oven needs to push coke frequently and for extended periods, and during the pushing process, the pusher rod undergoes thermal expansion and contraction due to rapid temperature changes before and after pushing, generating thermal stress. This eventually leads to upward bending at the connection between the inner box and the first section of the pusher rod, causing the pusher head to sag and scrape the bottom of the coke oven during pushing. Furthermore, due to the rapid temperature changes before and after pushing, the weld at the connection between the inner box and the first section of the pusher rod is prone to cracking, leading to the separation of the first section of the pusher rod from the inner box. This requires manual welding, which not only affects work efficiency but also shortens the service life of the pusher rod. Therefore, we propose a novel connection device for the pusher rod of a heat recovery coke oven pusher. Utility Model Content
[0004] The purpose of this invention is to provide a novel coke pusher rod connection device for a heat recovery coke oven pusher car, in order to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model adopts the following technical solution: a novel coke pusher rod connecting device for a heat recovery coke oven pusher car, comprising a pusher rod section I and a pusher rod section II connected by an inner box. Both the pusher rod section I and the pusher rod section II are hollow structures. The inner box is a box frame, with one end inserted and fixed inside the pusher rod section I and the other end inserted and fixed inside the pusher rod section II. The pusher rod section I and the pusher rod section II are connected to the inner box by two bushings, with pins driven into the bushings. The inner box has through holes that mate with the bushings and pins. Assembly holes are also provided at corresponding positions of the pusher rod section I and the pusher rod section II and the through holes. After connection, there is a certain gap between the connecting ends of the pusher rod section I and the pusher rod section II.
[0006] Furthermore, the inner box is inserted into the push rod section I to a depth equal to half its length.
[0007] Furthermore, the inner box is inserted into the push rod section II to a depth equal to half its length.
[0008] Furthermore, the bushing is an open bushing, and the pin is a round straight pin.
[0009] Furthermore, the end of the push rod section I that is away from the inner box is connected to the push head.
[0010] Compared with existing technologies, the above technical solution has the following advantages:
[0011] 1. Since the connection between the first and second sections of the coke pusher rod and the inner box is made by pin shaft, there is a certain gap at the connection between the first and second sections of the coke pusher rod. During long-term and frequent coke pushing, even if thermal stress is generated due to thermal expansion and contraction caused by rapid temperature changes before and after coke pushing, there will be no upward bending at the connection between the inner box and the first section of the coke pusher rod, and the coke pusher head will not sag. Therefore, the problem of scraping the bottom of the coke oven will not occur during the coke pushing process.
[0012] 2. Since the connection between the first section of the coke pusher rod and the inner box is directly connected by a pin shaft instead of a welded connection, there will be no disconnection between the first section of the coke pusher rod and the inner box due to weld cracking. At the same time, there is no need for repeated manual welding repairs, which significantly extends the service life of the coke pusher rod and reduces maintenance costs.
[0013] In summary, this solution features a simple overall structure and convenient installation. The use of pin-shaft connections instead of welded connections ensures a reasonable gap between the first and second sections of the coke pusher rod and the inner box. This avoids bending deformation caused by thermal stress and the problem of the coke pusher head drooping and scraping the furnace bottom, while also eliminating the risk of weld cracking and disconnection. It avoids the need for manual welding repair, significantly extends service life, and reduces maintenance costs, making it highly valuable for widespread application. Attached Figure Description
[0014] 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.
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This utility model corresponds to Figure 1 Top view;
[0017] Figure 3 It corresponds Figure 1 Enlarged view of section C in the image;
[0018] Figure 4 It corresponds Figure 1 EE section view in the image.
[0019] Explanation of reference numerals in the attached drawings: 1. Inner housing; 11. Bushing; 12. Pin; 2. Section I of the coke pusher rod; 3. Section II of the coke pusher rod; 4. Coke pusher head. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.
[0021] To address the problems existing in the prior art, this utility model provides a novel coke pusher rod connecting device for a heat recovery coke oven pusher car. The utility model will be described in detail below with reference to the accompanying drawings.
[0022] See Figures 1-4 As shown, the technical solution adopted in this specific embodiment is: a novel coke pusher rod connecting device for a heat recovery coke oven pusher car, comprising a pusher rod section I body 2 and a pusher rod section II body 3 connected by an inner box 1. Both pusher rod section I body 2 and pusher rod section II body 3 are hollow structures, while the inner box 1 is a box frame. One end of the inner box 1 is inserted into and fixed inside the pusher rod section I body 2, and the other end of the inner box 1 is inserted into and fixed inside the pusher rod section II body 3. Specifically, the depth to which the inner box 1 is inserted into the pusher rod section I body 2 is half its length, and the depth to which the inner box 1 is inserted into the pusher rod section II body 3 is the other half its length.
[0023] Specifically, the first section of the coke pusher rod 2 and the second section of the coke pusher rod 3 are connected to the inner housing 1 by two bushings 11, and a pin 12 is driven into the bushing 11. The inner housing 1 has through holes (not shown in the figure) that cooperate with the bushings 11 and the pin 12. The first section of the coke pusher rod 2 and the second section of the coke pusher rod 3 are also provided with assembly holes (not shown in the figure) at the corresponding positions of the through holes. When the first section of the coke pusher rod 2 and the second section of the coke pusher rod 3 are connected through the inner housing 1, there is a certain gap between the connecting ends of the first section of the coke pusher rod 2 and the second section of the coke pusher rod 3.
[0024] It should be noted that the bushing 11 used in this solution is an open bushing, and the pin 12 is a round straight pin, wherein the diameter of the pin 12 is 160mm.
[0025] Working principle: First, insert one end of the inner box 1 into the first section of the push rod 2, and drive the bushing 11 into the aligned hole to connect the first section of the push rod 2 with the inner box 1. Then, drive a pin 12 with a diameter of 160mm into the bushing 11. Similarly, insert the other end of the inner box 1 into the second section of the push rod 3, and drive the bushing 11 into the aligned hole to connect the second section of the push rod 3 with the inner box 1. Then, drive a pin 12 with a diameter of 160mm into the bushing 11. The connected coke pusher rod connection device of this heat recovery coke oven has a certain gap at the connection between the first section 2 and the second section 3 of the coke pusher rod. During long-term and frequent coke pushing, even if thermal stress is generated due to rapid temperature changes and thermal expansion and contraction before and after coke pushing, there will be no upward bending at the connection between the inner box 1 and the first section 2 of the coke pusher rod, and the coke pusher head 4 will not sag. Therefore, it will not cause the problem of scraping the bottom of the coke oven during the coke pushing process. In addition, since the connection between the first section 2 of the coke pusher rod and the inner box 1 no longer uses a welded connection, the phenomenon of separation due to weld cracking between the first section 2 of the coke pusher rod and the inner box 1 will not occur, which significantly extends the service life of the coke pusher rod and reduces maintenance costs.
[0026] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0027] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.
Claims
1. A novel coke pusher rod connecting device for a heat recovery coke oven pusher car, characterized in that, It includes a first section (2) and a second section (3) of a coking rod connected by an inner box (1). Both the first section (2) and the second section (3) of the coking rod are hollow structures. The inner box (1) is a box frame. One end of the inner box (1) is inserted into and fixed inside the first section (2) of the coking rod, and the other end of the inner box (1) is inserted into and fixed inside the second section (3) of the coking rod. The first section (2) and the second section (3) of the coking rod are connected by an inner box (1). (3) It is connected to the inner box (1) by two bushings (11) respectively. A pin (12) is driven into the bushing (11). The inner box (1) is provided with a through hole that cooperates with the bushing (11) and the pin (12). The push rod I section (2) and push rod II section (3) are also provided with assembly holes at the corresponding positions of the through hole. After connection, there is a gap between the connecting ends of the push rod I section (2) and the push rod II section (3).
2. The novel coke pusher rod connecting device for a heat recovery coke oven pusher car according to claim 1, characterized in that, The inner box (1) is inserted into the push rod section I (2) to a depth equal to half its length.
3. The novel coke pusher rod connecting device for a heat recovery coke oven pusher car according to claim 1, characterized in that, The inner box (1) is inserted into the push rod II section (3) to a depth equal to half its length.
4. The novel coke pusher rod connecting device for a heat recovery coke oven pusher car according to claim 1, characterized in that, The bushing (11) is an open bushing, and the pin (12) is a circular straight pin.
5. The novel coke pusher rod connecting device for a heat recovery coke oven pusher car according to claim 1, characterized in that, The end of the push rod I section (2) away from the inner box (1) is connected to the push head (4).