A coke oven door and frame cleaning device

Abstract

This utility model relates to a coke oven door and frame cleaning device, belonging to the field of coke oven cleaning technology. It includes a hollow column and multiple laser gun heads. A protective box is vertically slidable on the front side of the hollow column. A cable outlet box communicating with the interior of the protective box is fixedly connected to the lower rear end of the protective box. A cover plate is detachably fastened to the front opening of the protective box. Multiple laser gun heads are arranged horizontally and equidistantly inside the protective box. This utility model uses high-power laser beams emitted by the laser gun heads to irradiate impurities adhering to the surface of the oven door and frame, causing them to evaporate or decompose due to heat, thereby effectively removing impurities from the oven door and frame and achieving the cleaning purpose. Compared with traditional scraper-type cleaning, this laser cleaning method significantly improves the cleaning speed and can clean dead corners that scrapers cannot reach. Furthermore, laser cleaning does not require direct contact with the oven door and frame, thus avoiding wear and tear that may result from mechanical contact.

Description

Technical Field

[0001] This utility model relates to the field of coke oven cleaning technology, and in particular to a coke oven door and frame cleaning device. Background Technology

[0002] During coke production, flue gas, tar, and other impurities produced by burning coal in the coke oven adhere to the oven doors and frames. If these areas are not thoroughly cleaned in a timely manner, the accumulated impurities will gradually decrease over time, leading to a decline in the seal between the oven doors and frames, thus affecting the normal operation of the oven. When the seal is compromised, gaps may form between the oven doors and the oven body, causing smoke to escape and, in severe cases, adversely affecting the quality of the coke.

[0003] Currently, the main method for on-site cleaning is to use scrapers to clean the furnace door and furnace frame.

[0004] However, due to the limitations of its own structure, scraper cleaning often leaves some blind spots during the cleaning process. These blind spots are difficult to clean completely, resulting in gaps between the furnace door and the furnace frame, leading to poor sealing. In addition, due to long-term use in high-temperature environments, scrapers will experience varying degrees of wear, thus affecting their cleaning effectiveness. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this utility model provides a coke oven door and frame cleaning device. The technical solution of this utility model is as follows:

[0006] A coke oven door and frame cleaning device includes a hollow column and multiple sets of laser gun heads. A protective box is vertically slidably mounted on the front side of the hollow column. A cable outlet box communicating with the interior of the protective box is fixedly connected to the lower rear side of the protective box. A cover plate is detachably fastened to the front opening of the protective box. Multiple sets of laser gun heads are horizontally and equidistantly arranged inside the protective box. The cables of the multiple sets of laser gun heads extend to the outside of the cable outlet box and are connected to a laser machine. A square opening for the laser gun heads to emit laser beams is provided through the front surface of the cover plate. A drive component for driving the protective box to rise and fall is connected inside the hollow column. Position sensing components for sensing the position of the protective box are connected to the upper and lower rear ends of the hollow column. The position sensing components and the multiple sets of laser gun heads are electrically connected to a control terminal.

[0007] Optionally, the front edge of the protective box is provided with slots at both the top and bottom, and the rear edge of the cover is fixedly connected with insert plates. The insert plates are inserted into the slots and the two are fixed by screws.

[0008] Optionally, the front sidewall of the hollow column has a vertical movable slot. The drive assembly includes a lead screw, a nut seat, and a motor. The lead screw is rotatably connected to the inside of the hollow column. The nut seat is threaded onto the outside of the lead screw. A support seat is fixedly connected to the front side of the nut seat. The support seat is slidably connected to the inside of the movable slot. A support plate is fixedly connected to the front end of the support seat. The support plate is fixed to the rear side of the protective box by bolts. The top end of the lead screw rotatably passes through the hollow column and extends to the top of the hollow column. The output shaft of the motor is fixed to the top end of the lead screw, and the motor is fixedly connected to the upper end of the hollow column by a support frame.

[0009] Optionally, the support plate has fixed rods fixedly connected to both the left and right sides of its rear surface, and the two sets of fixed rods are located on the left and right sides of the support base respectively. The rear end of the fixed rod is fixedly connected to a guide sleeve. The hollow column has two sets of right-angle lugs fixedly connected to both the left and right sides. A guide rod is fixedly connected between the two sets of right-angle lugs on the same side. The guide sleeve is slidably sleeved on the outside of the guide rod on the corresponding side.

[0010] Optionally, a vertical movable slot two is provided through the rear side wall of the hollow column. The position sensing component includes a C-shaped buckle, which is fixedly connected to the rear side of the hollow column by bolts. The C-shaped buckle is located directly behind the movable slot two. A fixed sleeve is detachably connected to the transverse side of the C-shaped buckle. A movable rod is slidably connected to the front end of the fixed sleeve. A pressure head is fixedly connected to the front end of the movable rod. A spring and a sensor are fixedly connected inside the fixed sleeve. The rear end of the spring is fixedly connected to the rear side wall of the fixed sleeve. The front end of the spring is fixedly connected to the rear end face of the movable rod. The sensor is located inside the spring and is electrically connected to the control terminal. A contact is fixedly connected to the rear side of the nut seat. The contact is slidably connected inside the movable slot two. A protective shell is bolted to the rear side of the hollow column and located behind the movable slot two.

[0011] When the contact moves downward, it pushes the pressure head backward, causing the movable rod to compress the spring and trigger the sensor.

[0012] Optionally, the pressure head is a hemisphere, and the rear side of the contact is a semi-circular arc surface.

[0013] Optionally, the C-shaped buckle has a through-hole at the middle of its transverse side, and the fixing sleeve is movably connected inside the mounting hole. The outer side of the fixing sleeve is threaded with two sets of fixing nuts to determine the position of the fixing sleeve.

[0014] Optionally, the sensor may be a contact sensor.

[0015] All of the above-mentioned optional technical solutions can be combined arbitrarily, and this utility model does not provide a detailed description of the structure after each combination.

[0016] The beneficial effects of this utility model through the above solution are as follows:

[0017] This invention utilizes a laser gun head to emit a high-power laser beam that irradiates impurities adhering to the surface of the furnace door and frame, causing them to evaporate or decompose upon heating, thus effectively removing impurities and achieving the cleaning purpose. During cleaning, the drive assembly can drive the protective box and its internal multiple laser gun heads to clean from top to bottom along the hollow column. Compared with traditional scraper-type cleaning, this laser cleaning method significantly improves the cleaning speed and can clean areas that scrapers cannot reach. Furthermore, laser cleaning does not require direct contact with the furnace door and frame, thus avoiding wear and tear that may result from mechanical contact.

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall appearance structure of the coke oven door and frame cleaning device provided by this utility model;

[0020] Figure 2 Right sectional view of the coke oven door and frame cleaning device provided by this utility model;

[0021] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0022] Figure 4 An exploded view of the coke oven door and frame cleaning device provided by this utility model;

[0023] Figure 5 This is a schematic diagram showing the structure of the protective box, cover plate, and some components in the drive assembly that mate in this utility model.

[0024] Figure 6 This is a schematic diagram of the structure of the protective box and the laser gun head in this utility model.

[0025] Figure 7 This is an exploded structural diagram of the hollow column and position sensing component in this utility model;

[0026] Figure 8 This is an exploded structural diagram of the position sensing component in this utility model.

[0027] Numbered in the diagram: 1. Hollow column; 11. Movable slot one; 12. Movable slot two; 13. Base plate; 2. Protective box; 21. Slot; 22. Cable outlet box; 3. Cover plate; 31. Square opening; 32. Insert plate; 4. Laser gun head; 5. Drive assembly; 51. Lead screw; 52. Nut seat; 53. Support seat; 54. Support plate; 55. Motor; 56. Fixing rod; 57. Guide sleeve; 58. Right-angle ear seat; 59. Guide rod; 6. Position sensing assembly; 61. C-type buckle; 611. Mounting hole; 62. Fixing sleeve; 63. Fixing nut; 64. Movable rod; 65. Pressure head; 66. Spring; 67. Sensor; 68. Contact; 69. Protective shell. Detailed Implementation

[0028] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0029] Please see Figure 1-8 This utility model provides a coke oven door and frame cleaning device, including a hollow column 1 and multiple laser gun heads 4. A base plate 13 is fixedly connected to the lower end of the hollow column 1. A protective box 2 is vertically slidably mounted on the front side of the hollow column 1. A cable outlet box 22 that passes through the lower rear side of the protective box 2 is fixedly connected to the lower rear side of the protective box 2. A cover plate 3 is detachably fastened to the front opening of the protective box 2. Multiple laser gun heads 4 are horizontally and equidistantly arranged inside the protective box 2. The cables of multiple laser gun heads 4 extend to the outside of the cable outlet box 22 and are connected to the laser machine. A square opening 31 for the laser gun heads 4 to emit laser beams is provided through the front surface of the cover plate 3. A drive component 5 for driving the protective box 2 to rise and fall is connected inside the hollow column 1. Position sensing components 6 for sensing the position of the protective box 2 are connected to the upper and lower rear sides of the hollow column 1. The position sensing components 6 and multiple laser gun heads 4 are electrically connected to a control terminal.

[0030] This invention utilizes a laser gun head 4 to emit a high-power laser beam that irradiates impurities adhering to the surface of the furnace door and frame, causing them to evaporate or decompose upon heating, thus effectively removing impurities from the furnace door and frame and achieving the cleaning purpose. During cleaning, the drive assembly 5 can drive the protective box 2 and its internal multiple laser gun heads 4 to clean from top to bottom along the hollow column 1. Compared with traditional scraper-type cleaning, this laser cleaning method significantly improves the cleaning speed and can clean dead corners that scrapers cannot reach. Secondly, laser cleaning does not require direct contact with the furnace door and frame, thus avoiding wear and tear that may result from mechanical contact.

[0031] Specifically, by setting up the protective box 2 and the cover plate 3, not only is a physical barrier provided for the laser gun head 4, preventing the high-temperature airflow outside the coke oven from affecting the laser gun head 4, but it also plays a role in dust prevention and pollution prevention, extending the service life of the laser gun head 4. The square opening 31 on the front side of the cover plate 3 can be used for the laser beam to be emitted from the laser gun head 4. Secondly, a temperature sensor is also installed inside the protective box 2, and a cooling air inlet pipe assembly is reserved on the rear side. In practical applications, the temperature sensor can monitor the temperature inside the protective box 2, and a cooling system can be installed if necessary to cool down the inside of the protective box 2.

[0032] Specifically, by setting up the position sensing component 6, the position of the protective box 2 can be monitored in real time, thereby controlling the opening and closing of multiple sets of laser gun heads 4 via the control terminal. This is because the multiple sets of laser gun heads 4 inside the protective box 2 are arranged horizontally at equal intervals, allowing the laser beams emitted by the multiple sets of laser gun heads 4 to cover the entire horizontal plane. However, the area that actually needs to be cleaned on the furnace door and furnace frame is limited to its square outer frame. This means that the control terminal needs to automatically and selectively open or close some of the laser gun heads 4 according to different cleaning positions. When cleaning the upper and lower sides of the furnace door and furnace frame, all laser gun heads 4 need to be opened. When cleaning the sides of the furnace door or furnace frame, only the laser gun heads 4 located on the left and right sides need to be opened, while the inner laser gun heads 4 can be closed.

[0033] More specifically, the vertical movement of the protective box 2 corresponds to the height of the furnace door and frame, ensuring that the laser gun head 4 can accurately open and close with the assistance of the position sensing component 6. Position sensing components 6 are installed at the upper and lower rear ends of the hollow column 1, respectively. The installation position of the upper position sensing component 6 must be such that when multiple laser beams have just finished sweeping the upper side of the furnace door or frame, the upper position sensing component 6 detects the protective box 2. The installation position of the lower position sensing component 6 must be such that when the laser beam just begins to sweep the lower side of the furnace door and frame, the lower position sensing component 6 detects the protective box 2. During actual cleaning, after the upper position sensing component 6 detects the protective box 2, it transmits a position signal to the control terminal. The control terminal then controls the inner laser gun head 4 to close, only activating the laser gun heads 4 on both sides for cleaning. After the lower position sensing component 6 senses the protective box 2, it will transmit the position signal to the control terminal. The control terminal will then control the laser gun head 4 located on the inside to turn on again. At this time, all laser gun heads 4 will be turned on.

[0034] Furthermore, slots 21 are provided at the upper and lower ends of the front edge of the protective box 2, and insert plates 32 are fixedly connected to the upper and lower ends of the rear side of the cover plate 3. The insert plates 32 are inserted into the slots 21 and the two are fixed by screws.

[0035] Specifically, the cover plate 3 adopts a detachable structure, which facilitates the later maintenance of the laser gun head 4 inside the protective box 2.

[0036] Furthermore, a vertical movable slot 11 is provided through the front side wall of the hollow column 1. The drive assembly 5 includes a lead screw 51, a nut seat 52, and a motor 55. The lead screw 51 is rotatably connected to the inside of the hollow column 1. The nut seat 52 is threaded onto the outside of the lead screw 51. A support seat 53 is fixedly connected to the front side of the nut seat 52. The support seat 53 is slidably connected to the inside of the movable slot 11. A support plate 54 is fixedly connected to the front end of the support seat 53. The support plate 54 is fixed to the rear side of the protective box 2 by bolts. The top end of the lead screw 51 rotates through the hollow column 1 and extends to the top of the hollow column 1. The output shaft of the motor 55 is fixed to the top end of the lead screw 51, and the motor 55 is fixedly connected to the upper end of the hollow column 1 through a support frame. The motor 55 is electrically connected to the control terminal.

[0037] Specifically, when cleaning of the furnace door or frame is required, the motor 55 is controlled by the control terminal. The output shaft of the motor 55 drives the lead screw 51 to rotate. At this time, the nut seat 52 moves downward along the lead screw 51. The nut seat 52 drives the protective box 2 to move downward synchronously through the support seat 53 and the support plate 54. During this process, multiple sets of laser gun heads 4 inside the protective box 2 continuously emit laser beams, which can clean the impurities attached to the surface of the furnace door or frame.

[0038] Furthermore, fixing rods 56 are fixedly connected to both the left and right sides of the rear surface of the support plate 54, and the two sets of fixing rods 56 are located on the left and right sides of the support base 53 respectively. The rear end of the fixing rods 56 is fixedly connected to the guide sleeves 57. Two sets of right-angle lugs 58 are fixedly connected to both the left and right sides of the hollow column 1. A guide rod 59 is fixedly connected between the two sets of right-angle lugs 58 located on the same side. The guide sleeve 57 is slidably sleeved on the outside of the guide rod 59 on the corresponding side.

[0039] Specifically, when the protective box 2 moves up and down, it causes the two sets of guide sleeves 57 on the rear side to slide outside the guide rods 59 on the corresponding side. The cooperation between the guide sleeves 57 and the guide rods 59 can restrict and guide the movement path of the protective box 2.

[0040] Furthermore, a vertical movable slot 12 is provided through the rear side wall of the hollow column 1. The position sensing component 6 includes a C-shaped buckle 61, which is fixedly connected to the rear side of the hollow column 1 by bolts. The C-shaped buckle 61 is located directly behind the movable slot 12. A fixing sleeve 62 is detachably connected to the transverse side of the C-shaped buckle 61. A movable rod 64 is slidably connected to the front end of the fixing sleeve 62. A pressure head 65 is fixedly connected to the front end of the movable rod 64. The interior of the fixing sleeve 62... A spring 66 and a sensor 67 are fixedly connected. The rear end of the spring 66 is fixedly connected to the rear side wall of the fixed sleeve 62, and the front end of the spring 66 is fixedly connected to the rear end face of the movable rod 64. The sensor 67 is located inside the spring 66 and is electrically connected to the control terminal. A contact 68 is fixedly connected to the rear side of the nut seat 52. The contact 68 is slidably connected inside the movable groove 12. A protective shell 69 is bolted to the rear side of the hollow column 1 and located behind the movable groove 12.

[0041] When the contact 68 moves downward, it pushes the pressure head 65 to move backward, causing the movable rod 64 to compress the spring 66 and trigger the sensor 67.

[0042] Specifically, when the nut seat 52 moves downward, it will cause the rear contact 68 to move downward synchronously. As the contact 68 continues to move downward and reaches the position of the pressure head 65, it will gradually push the pressure head 65 and the movable rod 64 to move backward. During this process, the rear end of the movable rod 64 triggers the sensor 67, which transmits a signal to the control terminal in a timely manner. The control terminal adjusts the operating state of the laser gun head 4 according to the signal content. When the contact 68 continues to move downward and disengages from the pressure head 65, the pressure head 65 and the movable rod 64 will reset under the action of the spring 66.

[0043] Furthermore, the pressure head 65 is hemispherical, and the rear side of the contact 68 is a semi-circular arc surface.

[0044] Specifically, the semi-circular arc surface on the rear side of the contact 68 contacts the hemispherical pressure head 65, which effectively reduces friction during contact, making the contact process smoother and more stable. When the contact 68 moves downward, the curve shape of the semi-circular arc surface can better match the hemispherical pressure head 65, ensuring a more natural transition between the contact surfaces and reducing unnecessary resistance.

[0045] Furthermore, a mounting hole 611 is provided through the middle of the transverse side of the C-type buckle 61, and a fixing sleeve 62 is movably connected inside the mounting hole 611. Two sets of fixing nuts 63 are threaded on the outer side of the fixing sleeve 62 to determine the position of the fixing sleeve 62.

[0046] Specifically, the fixed sleeve 62 is fixed to the C-type buckle 61 by two sets of fixed nuts 63, and the position of the pressure head 65 can be adjusted by adjusting the position of the fixed nuts 63.

[0047] Furthermore, sensor 67 is a contact sensor.

[0048] Specifically, the sensor 67 will only generate a signal when the movable rod 64 comes into contact with the contact rod of the contact sensor. The contact sensor triggers signal generation through physical contact, which makes signal reception more stable and reliable.

[0049] Working Principle: Two cleaning devices are installed at corresponding positions on the SCP machine, specifically for cleaning the furnace door and frame. During cleaning, firstly, the motor 55 is controlled by the control terminal. The output shaft of the motor 55 drives the lead screw 51 to rotate, causing the nut seat 52 to move downwards along the lead screw 51. The nut seat 52, through the support seat 53 and support plate 54, drives the protective box 2 to move downwards synchronously. Secondly, while the motor 55 is operating, the laser machine is simultaneously activated. Multiple laser gun heads 4 inside the protective box 2 continuously emit laser beams through the square opening 31, cleaning impurities adhering to the upper side surface of the furnace door or frame. Thirdly, after the position sensing component 6 at the upper end senses the protective box 2, it transmits the position signal to the control terminal. The control terminal then controls the inner laser gun head 4 to close, only activating the laser gun heads 4 on both sides, allowing them to clean the sides of the furnace door or frame. Fourth, after the lower position sensing component 6 senses the protective box 2, the control terminal controls the inner laser gun head 4 to open. At this time, all laser gun heads 4 are open and begin cleaning the furnace door or the lower side of the furnace door. Fifth, after cleaning is completed, the control motor 55 is reversed to reset the height of the protective box 2 (when the motor 55 is reversed, the two sets of position sensing components 6 no longer react).

[0050] It should be noted that: 1. The furnace door and frame are cleaned each time they are removed from the furnace. Since the amount of impurities attached each time is relatively small, the cleaning process is relatively easy and will not cause excessive cleaning burden; 2. The laser machine can be an existing laser rust removal machine or other types of laser equipment; 3. The furnace door and frame need to be cleaned separately using two sets of cleaning devices, and the installation position of the position sensing component 6 in the two sets of cleaning devices needs to be adjusted accordingly according to the actual size of the furnace door or frame; 4. The circuit structure and principle mentioned above are all existing technologies and will not be described in detail here.

[0051] The above are merely preferred embodiments of this utility model and are not intended to limit this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A coke oven door frame cleaning device, characterized by: The device includes a hollow column (1) and multiple laser gun heads (4). A protective box (2) is vertically slidably mounted on the front side of the hollow column (1). A cable outlet box (22) that runs through the lower rear side of the protective box (2) is fixedly connected to the lower rear side of the protective box (2). A cover plate (3) is detachably fastened to the front opening of the protective box (2). Multiple laser gun heads (4) are arranged horizontally at equal intervals inside the protective box (2). The cables of multiple laser gun heads (4) extend to the outside of the cable outlet box (22) and are connected to the laser machine. A square opening (31) for the laser gun head (4) to emit a laser beam is opened through the front surface of the cover plate (3). A drive assembly (5) for driving the protective box (2) to rise and fall is connected inside the hollow column (1). A position sensing assembly (6) for sensing the position of the protective box (2) is connected to the upper and lower rear sides of the hollow column (1). The position sensing assembly (6) and multiple laser gun heads (4) are electrically connected to the control terminal.

2. A coke door frame cleaning device according to claim 1, characterised in that, The protective box (2) has slots (21) at the top and bottom of the front edge, and the cover plate (3) has inserts (32) fixedly connected to the top and bottom of the rear side. The inserts (32) are inserted into the slots (21) and the two are fixed by screws.

3. A coke door frame cleaning device according to claim 1, wherein The front side wall of the hollow column (1) is provided with a vertical movable slot (11). The drive assembly (5) includes a lead screw (51), a nut seat (52) and a motor (55). The lead screw (51) is rotatably connected to the inside of the hollow column (1). The nut seat (52) is threaded on the outside of the lead screw (51). A support seat (53) is fixedly connected to the front side of the nut seat (52). The support seat (53) is slidably connected to the inside of the movable slot (11). A support plate (54) is fixedly connected to the front end of the support seat (53). The support plate (54) is fixed to the rear side of the protective box (2) by bolts. The top end of the lead screw (51) rotates through the hollow column (1) and extends to the top of the hollow column (1). The output shaft of the motor (55) is fixed to the top end of the lead screw (51), and the motor (55) is fixedly connected to the upper end of the hollow column (1) by a support frame.

4. A coke door frame cleaning device according to claim 3, characterised in that, The support plate (54) has fixed rods (56) fixedly connected to both sides of the rear surface. The two sets of fixed rods (56) are located on the left and right sides of the support base (53). The rear end of the fixed rod (56) is fixedly connected to a guide sleeve (57). The hollow column (1) has two sets of right-angle lugs (58) fixedly connected to both sides. The two sets of right-angle lugs (58) on the same side are fixedly connected to a guide rod (59). The guide sleeve (57) is slidably sleeved on the outside of the guide rod (59) on the corresponding side.

5. A coke door frame cleaning device according to claim 3, wherein The hollow column (1) has a vertical movable slot 2 (12) through its rear side wall. The position sensing component (6) includes a C-shaped buckle (61), which is fixedly connected to the rear side of the hollow column (1) by bolts. The C-shaped buckle (61) is located directly behind the movable slot 2 (12). The horizontal side of the C-shaped buckle (61) is detachably connected to a fixed sleeve (62). The front end of the fixed sleeve (62) is slidably connected to a movable rod (64). The front end of the movable rod (64) is fixedly connected to a pressure head (65). The interior of the fixed sleeve (62) is fixedly connected to a movable rod (64). A spring (66) and a sensor (67) are connected. The rear end of the spring (66) is fixedly connected to the rear side wall of the fixed sleeve (62), and the front end of the spring (66) is fixedly connected to the rear end face of the movable rod (64). The sensor (67) is located inside the spring (66) and is electrically connected to the control terminal. A contact (68) is fixedly connected to the rear side of the nut seat (52). The contact (68) is slidably connected inside the movable groove two (12). A protective shell (69) is bolted to the rear side of the hollow column (1) and behind the movable groove two (12). When the contact (68) moves down, it pushes the pressure head (65) to move backward, causing the movable rod (64) to compress the spring (66) and trigger the sensor (67).

6. A coke door frame cleaning device according to claim 5, characterised in that, The pressure head (65) is a hemisphere, and the rear side of the contact (68) is a semi-circular arc surface.

7. A coke oven door and frame cleaning device according to claim 5, characterized in that, The C-type buckle (61) has a through-hole (611) at the middle of its transverse side. The fixing sleeve (62) is movably connected inside the mounting hole (611). The outer side of the fixing sleeve (62) is threaded with two sets of fixing nuts (63) to determine the position of the fixing sleeve (62).

8. A coke door frame cleaning device according to claim 5, wherein The sensor (67) is a contact sensor.

Images