Auxiliary device for improving tuyere dismounting efficiency

Abstract

The utility model relates to the technical field of blast furnace smelting, in particular to an auxiliary device for improving tuyere dismounting efficiency, and mainly aims at replacement of three sets of cooling equipment at a blast furnace tuyere. The auxiliary device for improving the tuyere dismounting efficiency comprises two pull rod mechanisms, wherein each pull rod mechanism comprises a pull rod and a hook head; the two ends of the pull rod in the length direction are the first end and the second end respectively, and the hook head is arranged at the first end of the pull rod and forms a preset included angle with the pull rod. The second ends of the two pull rods are rotationally connected through a connecting piece; the two hook heads are installed on the sides, away from each other, of the two pull rods. According to the auxiliary device for improving the tuyere dismounting efficiency, the two pull rod mechanisms connected with each other are arranged, the damaged tuyere sleeve is taken out together, the operation process is more stable, the operation efficiency is high, and the reliability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace smelting, in particular to an auxiliary device for improving the efficiency of tuyere disassembly, mainly for replacing three sets of cooling equipment at a blast furnace slag outlet. Background Art

[0002] The tuyere device of a blast furnace consists of a large tuyere sleeve, a middle tuyere sleeve and a small tuyere sleeve. The middle tuyere sleeve and the small tuyere sleeve are copper castings. The inside of the copper sleeve is a spiral cavity structure. High-pressure cooling water flows through the cavity to ensure that the middle tuyere sleeve and the small tuyere sleeve can work normally in the high-temperature and high-pressure environment in the furnace. Due to the reasons of slag-iron contact burning, hot air burning, aging cracking, burning caused by alkali metals, etc., the blast furnace tuyere device needs to be replaced frequently or regularly.

[0003] The traditional replacement mode is to remove the tuyere by shaking the two cooling water pipes of the tuyere after the tuyere is shut down, or by burning the tuyere sleeve. Since the small tuyere sleeve is in close contact with the middle tuyere sleeve and is often deformed after being damaged, it is difficult to remove it by shaking and it takes a long time. When burning the tuyere with oxygen, the flame temperature is difficult to control, which can easily cause the middle tuyere sleeve to burn out, and the tuyere area is narrow, which can easily cause injuries when burning the tuyere.

[0004] The utility model patent with the authorization announcement number CN212174976U provides a disassembly device for a blast furnace tuyere sleeve, which includes: a support beam, a pull rod and a driving mechanism. The length of the support beam is greater than the outer diameter of the blast furnace tuyere, and is supported on the outside of the blast furnace tuyere; a through hole is provided on the support beam. The pull rod passes through the through hole, and the rear end is placed on the outside of the blast furnace tuyere, and a hook is provided at the front end, and the front end is placed on the inside of the blast furnace tuyere, and the hook can hook the tuyere sleeve; the driving mechanism is arranged between the pull rod and the support beam, and the driving mechanism is configured to drive the pull rod to move relative to the support beam. Because this operating device of the prior art needs to adjust the pull hook on the pull rod to just be able to offset the tuyere sleeve when in use, and the through hole on the support beam is set to be coaxial with the tuyere sleeve. However, in actual situations, the ends of the tuyere sleeves are often burned, making it difficult to provide sufficient support for the pull hook. Although the support beam can be adjusted to make the through hole on it coaxial with the tuyere sleeve, it is difficult to achieve both the through hole on the support beam coaxial with the tuyere sleeve and the pull hook adjusted to just offset the tuyere sleeve at the same time, resulting in the problem of mismatch during use. Based on this, the existing technology still needs to be improved. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model proposes an auxiliary device for improving the efficiency of disassembling the tuyere, which can at least solve the problem of unstable operation of the prior auxiliary device.

[0006] The utility model proposes an auxiliary device for improving the efficiency of air outlet disassembly, which includes two pull rod mechanisms, each of which includes a pull rod and a hook head; the two ends of the pull rod along its length direction are respectively a first end and a second end, the hook head is arranged at the first end of the pull rod, and is arranged at a preset angle to the pull rod; the second ends of the two pull rods are rotatably connected by a connecting piece; wherein the two hook heads are installed on the side of the two pull rods that are away from each other.

[0007] In some embodiments, a spring is provided between the two pull rods to make the two pull rods be arranged at an angle in a natural state, so as to facilitate the rapid insertion of the two hooks into the sockets, and to keep the two hooks in the open state when the staff applies force backwards, further preventing the hooks from falling out of the sockets.

[0008] In some embodiments, the connecting member includes a hinge shaft and a sealing member, and the second ends of the two pull rods are each provided with a hinge hole, and the pull rods are rotatably sleeved on the hinge shaft through the hinge holes; wherein the sealing member is arranged at both ends of the hinge shaft to prevent the pull rods from detaching from the hinge shaft.

[0009] In some embodiments, a connecting seat is provided on the pull rod, and both ends of the spring are detachably connected to the two connecting seats respectively. The strength and length of the spring are selected according to the size of the air outlet ring and the position of the socket to meet different operating requirements.

[0010] In some embodiments, the length of the pull rod is greater than the depth of the entire blast furnace tuyere device, which is convenient for staff to operate.

[0011] In some embodiments, the preset angle between the pull rod and the hook head is greater than 90° and less than 120°, so that the hook head and the conical surface of the air port sleeve are in a vertical or approximately vertical state.

[0012] In some embodiments, a barb is provided at the end of the hook head, and the barb faces the side where the second end of the pull rod is located, so that when the hook head is inserted into the insertion hole, the barb can be buckled on the outer surface of the air outlet sleeve.

[0013] In some embodiments, the end of the hook head away from the pull rod forms a pointed end, which facilitates the barb and the hook head to pass through the insertion hole.

[0014] In some embodiments, the spring is in a compressed state when the two pull rod mechanisms disassemble the air outlet, so that when the pull rods are pulled, the hook head is always inserted into the socket and does not separate from the socket.

[0015] In some embodiments, the auxiliary device for improving the efficiency of air outlet disassembly of the utility model further includes a handle, and the handle is arranged on the hinge shaft to facilitate the staff to control the pull rod to apply force.

[0016] The beneficial effects of the utility model are as follows: the auxiliary device for improving the efficiency of disassembling the tuyere proposed in the present application is provided with two mutually connected pull rod mechanisms to jointly remove the damaged tuyere sleeve, and the operation process is more stable, the operation efficiency is high, and the reliability is strong. In addition, the second ends of the two pull rods are rotatably connected by a connecting piece, so that the angle between the two pull rod mechanisms is adjustable, and different tuyere sleeves and the positions of the holes on the tuyere sleeves can be adapted. The entire auxiliary device has a simple structure and is suitable for relatively narrow areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to better understand the utility model, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily drawn to scale, and related elements may be omitted, or in some cases the scale may have been enlarged in order to emphasize and clearly illustrate the novel features described herein. In addition, as is known in the art, system components may be arranged differently. In addition, in the drawings, throughout several views, the same reference numerals represent corresponding parts.

[0018] Figure 1 A schematic diagram of the structure of an auxiliary device for improving the efficiency of air outlet disassembly provided by the utility model is shown;

[0019] Figure 2 A reference diagram of a use state of an auxiliary device for improving the efficiency of disassembling an air outlet provided by the utility model is shown.

[0020] Description of reference numerals:

[0021] 1. Pull rod; 2. Hook; 3. Inverted hook; 4. Spring; 5. Air outlet sleeve; 51. Small air outlet sleeve; 52. Medium air outlet sleeve; 53. Large air outlet sleeve; 6. Articulated shaft; 7. Handle. DETAILED DESCRIPTION

[0022] It should be understood that the embodiments of the present invention shown in the exemplary embodiments are illustrative only. Although only a few embodiments are described in detail in the present invention, it is easy for those skilled in the art to understand that multiple modifications are feasible without actually departing from the teachings of the subject matter of the present invention. Accordingly, all such modifications should be included within the scope of the present invention. Without departing from the gist of the present invention, other replacements, modifications, changes and deletions may be made to the design, operating conditions and parameters of the following exemplary embodiments.

[0023] like Figure 1As shown, the utility model provides an auxiliary device for improving the efficiency of tuyere disassembly, including two pull rod mechanisms, each pull rod mechanism including a pull rod 1 and a hook head 2; the two ends of the pull rod 1 along its length direction are respectively a first end and a second end, the hook head 2 is arranged at the first end of the pull rod 1, and is arranged at a preset angle with the pull rod 1, the pull rod 1 can be made of a seamless steel pipe, and the hook head 2 can be installed on the pull rod 1 by welding, or can be arranged to be integrally formed with the pull rod 1. The second ends of the two pull rods 1 are rotatably connected by a connecting piece. Among them, the two hook heads 2 are installed on the side of the two pull rods 1 that are away from each other. When using the auxiliary device, it is necessary to symmetrically dig out two sockets at the end of the damaged tuyere sleeve 5, and the aperture of the socket can accommodate the hook head 2 to move deeply. After that, the auxiliary device is sent to the rear end of the blast furnace tuyere (that is, the end with a larger diameter of the blast furnace tuyere), and then the hook heads 2 on the two pull rods 1 are respectively inserted into the sockets, and the staff reciprocates and applies force backward until the tuyere sleeve 5 is taken out under the pull of the hook head 2.

[0024] The auxiliary device for improving the efficiency of air outlet removal proposed in the present application is provided with two mutually connected pull rod mechanisms to jointly remove the damaged air outlet sleeve 5, and the operation process is more stable, the operation efficiency is high, and the reliability is strong. In addition, the second ends of the two pull rods 1 are rotatably connected by a connecting piece, so that the angle between the two pull rod mechanisms is adjustable, and different air outlet sleeves 5 and the positions of the holes on the air outlet sleeves 5 can be adapted. The entire auxiliary device has a simple structure and is suitable for relatively narrow areas.

[0025] In some embodiments, a spring 4 is provided between the two pull rods 1 to enable the two pull rods 1 to be arranged at an angle in a natural state, so as to facilitate the rapid insertion of the two hook heads 2 into the insertion holes, and to always keep the two hook heads 2 in an open state when the staff applies force backwards, further preventing the hook heads 2 from being separated from the insertion holes. Specifically, the spring 4 has sufficient strength to enable the two pull rods 1 to be arranged at an angle in a natural state.

[0026] In some embodiments, the connecting member includes a hinge shaft 6 and a blocking member, and the second ends of the two pull rods 1 are both provided with a hinge hole, and the pull rod 1 is rotatably sleeved on the hinge shaft 6 through the hinge hole, thereby realizing the rotation connection between the two pull rods 1. The blocking member is provided at both ends of the hinge shaft 6 (not shown in the figure), and the blocking member can be a fastening nut or a welding baffle, etc., to prevent the pull rod 1 from being separated from the hinge shaft 6.

[0027] In some embodiments, a connecting seat is provided on the pull rod 1, and the two ends of the spring 4 are detachably connected to the two connecting seats. Specifically, the connecting seat is located near the middle of the pull rod 1, and the connecting seat is a connecting ring fixed on the pull rod 1. The two ends of the spring 4 are respectively hung on the connecting ring. The spring 4 is detachably connected to the connecting ring, so that the strength and length of the spring 4 can also be selected according to the size of the air outlet ring and the position of the jack to meet different operation requirements.

[0028] In some embodiments, the length of the pull rod 1 is greater than the depth of the entire blast furnace tuyere device. For example, the depth of the blast furnace tuyere device is 4 meters, and the length of the pull rod 1 is 5 meters, which is convenient for the staff to operate.

[0029] In some embodiments, the preset angle between the pull rod 1 and the hook head 2 is greater than 90° and less than 120°. Since the two pull rods 1 are arranged at an angle, in order to make the hook head 2 and the conical surface of the air port sleeve 5 vertical or approximately vertical, the angle between the pull rod 1 and the hook head 2 needs to be set to be slightly greater than 90°.

[0030] In some embodiments, a barb 3 is provided at the end of the hook head 2, and the barb 3 faces the side where the second end of the pull rod 1 is located, so that when the hook head 2 is inserted into the insertion hole, the barb 3 can be buckled on the outer surface of the air outlet sleeve 5. The barb 3 is welded to the end of the hook head 2, or is integrally formed with the hook head 2. It should be noted that when digging the insertion hole, the size of the insertion hole can be sufficient to allow the hook head 2 and the barb 3 to pass through at the same time, and it does not need to be set too large.

[0031] In some embodiments, the end of the hook head 2 away from the pull rod 1 forms a pointed end, which facilitates the barb 3 and the hook head 2 to pass through the insertion hole.

[0032] In some embodiments, the spring 4 is in a compressed state when the two pull rod mechanisms disassemble the air outlet, so that when the pull rod 1 is pulled, the hook head 2 is always inserted into the socket and does not separate from the socket.

[0033] In some embodiments, the auxiliary device for improving the efficiency of air outlet disassembly further includes a handle 7, and the handle 7 is arranged on the hinge shaft 6 to facilitate the staff to control the pull rod 1 to apply force.

[0034] like Figure 2 As shown, the auxiliary device for improving the efficiency of air outlet disassembly provided by the utility model can disassemble the small air outlet sleeve 51, the middle air outlet sleeve 52 and the large air outlet sleeve 53, which is commonly used in disassembling the small air outlet sleeve 51, and the use method is the same, which is as follows:

[0035] First, the blast furnace is shut down and the air is reversed. Then, two symmetrical sockets are dug out at the end of the damaged tuyere sleeve 5. The size of the sockets is sufficient for the hook head 2 and the barb 3 to pass through at the same time. Select a suitable spring 4 and install it between the two tie rods 1. Then, the auxiliary device is sent to the rear end of the blast furnace tuyere (i.e., the end with a larger diameter of the blast furnace tuyere). Then, the tie rod 1 is passed through the rear end of the tuyere sleeve 5, so that the hook heads 2 on the two tie rods 1 are respectively inserted into the sockets, and the barb 3 extends out of the sockets. After that, the staff applies force back and forth by pulling the handle 7 until the tuyere sleeve 5 is loosened under the pull of the hook head 2. Finally, the control tie rod 1 is removed and the hook head 2 and the barb 3 are withdrawn from the socket.

[0036] It should be understood that, under the premise of being technically feasible, the technical features listed above for different embodiments can be combined with each other to form other embodiments within the scope of the present utility model.

[0037] The above embodiments are possible examples of implementation methods of the utility model, and are only given to enable those skilled in the art to clearly understand the principles of the utility model. Those skilled in the art should understand that the above discussion of any embodiment is only exemplary and is not intended to imply that the scope (including claims) disclosed in the embodiments of the utility model is limited to these examples. Under the overall concept of the utility model, the technical features in the above embodiments or different embodiments can also be combined with each other, and many other changes in different aspects of the embodiments of the utility model as described above are produced. For the sake of simplicity, they are not provided in the specific implementation. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the utility model should be included in the scope of protection required by the utility model.

Claims

1. An auxiliary device for improving the efficiency of air outlet removal, characterized in that: include: Two pull rod mechanisms, each of which comprises a pull rod (1) and a hook head (2); the two ends of the pull rod (1) along its length direction are respectively a first end and a second end, the hook head (2) is arranged at the first end of the pull rod (1) and is arranged at a preset angle with the pull rod (1); the second ends of the two pull rods (1) are rotatably connected via a connecting piece; wherein the two hook heads (2) are installed on the side of the two pull rods (1) that are away from each other.

2. The auxiliary device for improving the efficiency of air outlet removal according to claim 1, characterized in that: A spring (4) is arranged between the two pull rods (1) so that the two pull rods (1) are arranged at an angle in a natural state.

3. The auxiliary device for improving the efficiency of air outlet removal according to claim 1, characterized in that: The connecting member comprises a hinge shaft (6) and a sealing member, and the second ends of the two pull rods (1) are each provided with a hinge hole, and the pull rods (1) are rotatably sleeved on the hinge shaft (6) through the hinge hole; wherein the sealing member is arranged at both ends of the hinge shaft (6).

4. The auxiliary device for improving the efficiency of air outlet removal according to claim 2, characterized in that: The pull rod (1) is provided with a connecting seat, and the two ends of the spring (4) are respectively detachably connected to the two connecting seats.

5. The auxiliary device for improving the efficiency of air outlet removal according to claim 1, characterized in that: The length of the pull rod (1) is greater than the depth of the entire blast furnace tuyere device.

6. The auxiliary device for improving the efficiency of air outlet removal according to claim 1, characterized in that: The preset angle between the pull rod (1) and the hook head (2) is greater than 90° and less than 120°.

7. The auxiliary device for improving the efficiency of air outlet removal according to claim 1, characterized in that: A barb (3) is provided at the end of the hook head (2), and the barb (3) faces the side where the second end of the pull rod (1) is located.

8. The auxiliary device for improving the efficiency of air outlet removal according to claim 7, characterized in that: The end of the hook head (2) away from the pull rod (1) forms a pointed end.

9. The auxiliary device for improving the efficiency of air outlet removal according to claim 2, characterized in that: The spring (4) is in a compressed state when the two pull rod mechanisms disassemble the air outlet.

10. The auxiliary device for improving the efficiency of air outlet removal according to claim 3, characterized in that: It also comprises a handle (7), wherein the handle (7) is arranged on the hinge shaft (6).

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