Movable mud sleeve for emergency iron notch plugging

Abstract

The utility model relates to a movable mud sleeve for emergency blocking of an iron notch. The movable mud sleeve comprises a mud sleeve frame, an insertion pipe, a supporting frame, an iron notch side mud sleeve and a gun head side mud sleeve. The inserting pipe is fixedly connected with a mud sleeve frame, the mud sleeve frame is of a straight pipe structure, one end in the mud sleeve frame is fixedly connected with a supporting frame, and an iron notch side mud sleeve and a gun head side mud sleeve are arranged between the supporting frame and the mud sleeve frame; the iron notch side mud sleeve is in contact with the iron notch damaged mud sleeve; and the gun head side mud sleeve is contacted with the gun head. The device has the advantages that the device can serve as a taphole mud sleeve when the taphole mud sleeve is damaged, the mud sleeve frame can assist a mud gun in completing mud blocking work, the taphole side mud sleeve makes contact with the taphole damaged mud sleeve to achieve the sealing effect, meanwhile, the insertion pipe penetrates into a taphole duct, it can be guaranteed that stemming does not overflow, and the mud gun is helped to complete mud beating and plugging operation; blast furnace wind reduction or damping-down blast blockage caused by mud sleeve damage is avoided, and the operation stability of the blast furnace is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of blast furnace front, and particularly relates to a movable mud sleeve for emergency iron hole blocking. Background Art

[0002] The iron mouth of a blast furnace is composed of an iron mouth frame, an iron mouth channel surrounded by carbon bricks, and a mud sleeve. In the production process of a blast furnace, the iron mouth is usually blocked by a hydraulic mud gun, which drives the gun mud into the iron mouth channel under a certain pressure. The gun mud is coked and solidified at high temperature within a certain period of time to form a new mud core to complete the iron mouth blocking process. The mud sleeve is in direct contact with the gun head and acts as a seal. If the iron mouth mud sleeve is damaged or defective during the production process, it is easy to cause the gun head of the mud gun to be loosely in contact with the mud sleeve, and pressure relief and mud bubbling will occur during mud beating. In mild cases, the iron mouth becomes shallower. In severe cases, the gun cannot be blocked, and molten iron follows out after the gun is pulled out, which poses a serious hidden danger to the smooth operation of the blast furnace and production safety.

[0003] In the prior art, patent application number CN202021732976.5 discloses an emergency iron mouth plugging device, which uses a plugging body to plug the iron mouth, and uses a structure with a water inlet channel to quickly solidify the iron mouth slag to achieve plugging of the iron mouth. This method is affected by the damage of the iron mouth mud sleeve. If the iron mouth mud sleeve is severely damaged, the solidification speed will also be affected.

[0004] Patent application number CN202023157213.5 discloses an emergency iron mouth plugging device for a blast furnace, including a takeover rod, a vertebral transition section, and a front end pick. The takeover rod is arranged at one end of the vertebral transition section, and the front end pick is arranged at the other end of the vertebral transition section. The takeover rod is connected with a takeover on the iron mouth opening machine trolley. When the mud gun equipment fails or the iron mouth mud sleeve is damaged and the mud gun cannot be used for normal iron mouth plugging operations, after the iron mouth splashes, the staff on duty operates the iron mouth opening machine to move forward and align the front end pick at the iron mouth position, so that the iron mouth opening machine trolley moves forward to drive the takeover and the emergency iron mouth plugging device into the iron mouth channel until the iron mouth plugging operation is completed. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the utility model aims to provide a movable mud sleeve for emergency plugging of iron mouths, which can temporarily serve as an iron mouth mud sleeve when the iron mouth mud sleeve is damaged, and assist the mud gun to complete the operation of mud plugging.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] A movable mud sleeve for emergency plugging of an iron mouth comprises a mud sleeve frame, an insertion tube, a support frame, an iron mouth side mud sleeve, and a gun head side mud sleeve; the insertion tube is fixedly connected to the mud sleeve frame, the mud sleeve frame is a straight tube structure, one end of the mud sleeve frame is fixedly connected to the support frame, and an iron mouth side mud sleeve and a gun head side mud sleeve are arranged between the support frame and the mud sleeve frame; the iron mouth side mud sleeve contacts with a damaged iron mouth mud sleeve; and the gun head side mud sleeve contacts with the gun head.

[0008] It also includes a fixed wedge strip. The other end of the mud sleeve frame is evenly distributed with sockets along the radial direction, and the fixed wedge strip is plugged into the sockets.

[0009] The mud sleeve frame and the supporting frame are an integrated structure.

[0010] The mud sleeve frame and the supporting frame are both cast iron parts.

[0011] The end surface of the mud sleeve on the iron mouth side protrudes from the end surface of the mud sleeve frame.

[0012] The insertion tube is a heat-resistant steel tube.

[0013] The inner diameter of the mud sleeve on the gun head side is smaller than the inner diameter of the gun head.

[0014] The inner diameter of the mud sleeve frame is larger than the outer diameter of the gun head.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The movable mud sleeve used for emergency iron mouth plugging can act as an iron mouth mud sleeve when the iron mouth mud sleeve is damaged. The mud sleeve frame can assist the mud gun to complete the mud plugging work. The iron mouth side mud sleeve contacts with the damaged iron mouth mud sleeve to play a sealing role. At the same time, the insertion tube penetrates into the iron mouth channel to ensure that the gun mud does not overflow, helping the mud gun to complete the mud plugging operation, avoiding the blast furnace wind reduction or wind stop blockage due to the damaged mud sleeve, and improving the blast furnace operation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] In the figure: 1-mud sleeve frame 2-mud sleeve on the iron mouth side 3-mud sleeve on the gun head side 4-gun head 5-mud gun 6-fixing wedge 7-insertion end 8-support frame. DETAILED DESCRIPTION

[0019] The present invention is described in detail below in conjunction with the accompanying drawings of the specification, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0020] See Figure 1A movable mud sleeve for emergency iron mouth blocking comprises a mud sleeve frame 1, an insertion tube 7, an iron mouth side mud sleeve 2, and a gun head side mud sleeve 3; the insertion tube 7 is fixedly connected to the mud sleeve frame 1, the mud sleeve frame 1 is a straight tube structure, one end of the mud sleeve frame 1 is fixedly connected to a support frame 8, and an iron mouth side mud sleeve 2 and a gun head side mud sleeve 3 are arranged between the support frame 8 and the mud sleeve frame 1; the iron mouth side mud sleeve 2 is in contact with the damaged iron mouth mud sleeve; the gun head side mud sleeve 3 is in contact with the gun head 4.

[0021] The movable mud sleeve for emergency iron hole plugging also includes a fixed wedge strip 6. The other end of the mud sleeve frame 1 is evenly distributed with sockets along the radial direction, and the fixed wedge strip 6 is plugged into the sockets. There can be three sockets distributed at 120 degrees. The mud sleeve frame 1 is installed on the gun head 4, and the fixed wedge strip 6 is inserted into the socket. The end of the fixed wedge strip 6 is pressed against the gun head 4, so that the mud sleeve frame 1 is fixed on the outside of the gun head 4.

[0022] The mud jacket frame 1 and the support frame 8 are an integrated structure, and both the mud jacket frame 1 and the support frame 8 are cast iron parts. Two coaxial annular cavity structures are formed between the support frame 8 and the mud jacket frame 1, and the iron mouth side mud jacket 2 and the gun head side mud jacket 3 are respectively arranged in the cavity structure. The end face of the iron mouth side mud jacket 2 slightly protrudes from the end face of the mud jacket frame 1 for better sealing.

[0023] The insertion tube 7 can be made of a heat-resistant steel tube, the inner diameter b of the insertion tube 7 is 40-50 cm, the insertion tube 7 is coaxial with the support frame 8, and the part of the mud sleeve 2 on the iron mouth side protruding from the mud sleeve frame 1 abuts against the outer wall of the insertion tube 7. The inner diameter a of the mud sleeve 3 on the gun head side is slightly smaller than the inner diameter of the gun head 4, so that the end of the gun head 4 can abut against the mud sleeve 3 on the gun head side without scratching the support frame 8. The inner diameter c of the mud sleeve frame 1 is slightly larger than the outer diameter of the gun head 4, and the gun head 4 can smoothly enter the mud sleeve frame 1.

[0024] When the iron mouth mud sleeve is damaged and emergency plugging is required, the mud sleeve frame 1 is installed on the gun head 4 and fixed with three wedge strips 6. The mud gun 5 is rotated to align the insertion tube 7 with the iron mouth and press it into the iron mouth. At this time, the iron mouth side mud sleeve 2 contacts the damaged iron mouth mud sleeve and is pressed tightly by the pressure of the mud gun 5. The gun head side mud sleeve 3 is in close contact with the gun head 4 to play a sealing role. In normal mud beating, the gun mud enters the iron mouth channel through the insertion tube 7 to complete the mud beating operation. After the gun mud solidifies, pull out the fixed wedge strip 6, pull out the gun head 4 and the mud gun 5, and complete the iron mouth plugging operation.

[0025] The utility model can act as a mud sleeve for the iron mouth when the iron mouth mud sleeve is damaged. The mud sleeve frame 1 can assist the mud gun 5 to complete the mud blocking work. The iron mouth side mud sleeve 2 contacts with the damaged iron mouth mud sleeve to play a sealing role. At the same time, the insertion tube 7 penetrates deep into the iron mouth channel to ensure that the gun mud does not overflow, and helps the mud gun 5 to complete the mud blocking operation, avoids the gun blocking due to the reduction of blast furnace air or the suspension of air due to the damaged mud sleeve, and improves the operation stability of the blast furnace.

[0026] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and concept of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. The methods used in the above embodiments are conventional methods unless otherwise specified.

Claims

1. A movable mud sleeve for emergency iron hole plugging, characterized in that: It includes a mud sleeve frame, an insertion tube, a mud sleeve on the iron mouth side, and a mud sleeve on the gun head side; the insertion tube is fixedly connected to the mud sleeve frame, the mud sleeve frame is a straight tube structure, one end of the mud sleeve frame is fixedly connected to a supporting frame, and a mud sleeve on the iron mouth side and a mud sleeve on the gun head side are arranged between the supporting frame and the mud sleeve frame; the mud sleeve on the iron mouth side contacts with the damaged mud sleeve on the iron mouth; and the mud sleeve on the gun head side contacts with the gun head.

2. The movable mud sleeve for emergency iron hole plugging according to claim 1 is characterized in that: It also includes a fixed wedge strip. The other end of the mud sleeve frame is evenly distributed with sockets along the radial direction, and the fixed wedge strip is plugged into the sockets.

3. The movable mud sleeve for emergency iron hole plugging according to claim 1 is characterized in that: The mud sleeve frame and the supporting frame are an integrated structure.

4. The movable mud sleeve for emergency iron hole plugging according to claim 1 is characterized in that: The mud sleeve frame and the supporting frame are both cast iron parts.

5. The movable mud sleeve for emergency iron hole plugging according to claim 1 is characterized in that: The end surface of the mud sleeve on the iron mouth side protrudes from the end surface of the mud sleeve frame.

6. The movable mud sleeve for emergency iron hole plugging according to claim 1 is characterized in that: The insertion tube is a heat-resistant steel tube.

7. The movable mud sleeve for emergency iron hole plugging according to claim 1 is characterized in that: The inner diameter of the mud sleeve on the gun head side is smaller than the inner diameter of the gun head.

8. The movable mud sleeve for emergency iron hole plugging according to claim 1 is characterized in that: The inner diameter of the mud sleeve frame is larger than the outer diameter of the gun head.

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