Safe opening device for furnace top ignition manhole

Abstract

The utility model discloses a safe opening device for a furnace top ignition manhole, belongs to the technical field of blast furnace ignition manholes, and solves the problem that potential safety hazards exist in opening of the blast furnace ignition manholes. The device comprises a winch and an operating handle, the winch is installed on a lower sealing valve platform on one side of the blast furnace, a first pulley assembly is arranged on a roof over the winch, and a second pulley assembly is arranged on the roof between the first pulley assembly and the blast furnace. A pull rope of the winch sequentially penetrates through the first pulley assembly and the second pulley assembly to be connected with the manhole cover. The operating handle is connected with the winch through a wire, and the operating handle is electrically connected with the winch through a controller. A contact sensor is arranged on the blast furnace on the back side of the manhole cover, and an alarm is arranged on the blast furnace. According to the utility model, an operator can open the manhole cover at a distance, so that the labor intensity can be effectively reduced, and the operation safety is improved at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace ignition manholes, and more specifically, to a blast furnace ignition manhole safety opening device. Background Art

[0002] During the planned maintenance of the blast furnace, when the conditions for wind stop are met, it is necessary to open the ignition manhole on the top of the furnace to ignite the blast furnace to prevent gas from escaping and avoid gas poisoning accidents. At present, most blast furnace top systems have two ignition manholes, of which the ignition manhole on the large manhole side is opened by a supporting crane, and the other side has no electric opening device and can only be opened by a hand winch.

[0003] The ignition manhole is opened by a hand winch. The operator is close to the manhole cover and there is a risk of being hit by the manhole cover. At the same time, a large amount of gas escapes from the furnace, which poses a risk of gas poisoning. For example, high-temperature coke cannot be avoided when it is sprayed out.

[0004] Therefore, it is urgent to design a furnace top ignition manhole safety opening device to solve the above-mentioned problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a furnace top ignition manhole safety opening device in view of the above-mentioned deficiencies in the prior art, so that operators can operate to open the manhole cover at a distance, which can effectively reduce labor intensity and improve operational safety.

[0006] The technical solution of the utility model is as follows: a furnace top ignition manhole safety opening device, including a winch and an operating handle, the winch is installed on the lower sealing valve platform on one side of the blast furnace, a first pulley assembly is provided on the roof directly above the winch, a second pulley assembly is provided on the roof between the first pulley assembly and the blast furnace, a pull rope of the winch passes through the first pulley assembly and the second pulley assembly in sequence and is connected to the manhole cover; the operating handle and the winch are connected by a wire, and the operating handle and the winch are electrically connected by a controller; a contact sensor is provided on the blast furnace on the back side of the manhole cover, an alarm is provided on the blast furnace, and the contact sensor is electrically connected to the alarm through the controller.

[0007] As a further improvement, the first pulley assembly has the same structure as the second pulley assembly, and comprises a hook, a connecting plate and a guide pulley. One end of the hook is hung on the crossbeam of the roof, and the other end is movably plugged into the connecting plate. A limiting plate is provided on the hook below the connecting plate, and a detachable bracket is provided below the connecting plate, and the guide pulley is rotatably mounted on the bracket.

[0008] Furthermore, the bracket includes a cross bar and a U-shaped frame, the closed end of the U-shaped frame is connected to the cross bar, the guide pulley is rotatably installed on the open end of the U-shaped frame, screws are provided at both ends of the cross bar, the screws are movably inserted at both ends of the connecting plate, and a locking nut is threadedly connected to the screw above the connecting plate.

[0009] Furthermore, a limit nut is threadedly connected to the screw rod below the connecting plate.

[0010] Furthermore, a mounting seat is provided on the outer wall of the blast furnace on the back side of the manhole cover, and two symmetrically arranged support rods are provided on the mounting seat, and the contact sensor is installed on the support rods.

[0011] Furthermore, a sleeve is installed on the top of the two support rods, a mounting sleeve is slidably inserted in the sleeve, the contact sensor is installed on the mounting sleeve near one end of the manhole cover, a buffer spring is provided in the sleeve, and both ends of the buffer spring are respectively connected to the sleeve and the mounting sleeve.

[0012] Beneficial Effects

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. The utility model discloses a furnace top ignition manhole safety opening device, by arranging a winch on one side of the blast furnace, the pull rope of the winch passes through the pulley assembly and is connected to the manhole cover. When the manhole cover needs to be opened, the winch is controlled to work by an operating handle, and the pull rope is retracted to open the manhole cover, so that the operator can operate to open the manhole cover from a distance, which can effectively reduce the labor intensity and improve the operation safety. At the same time, the pulley assembly is a rotatable and detachable installation method. With the opening of the manhole cover, the guide pulley of the pulley assembly will not be stuck, which can ensure the smoothness of the pull rope retraction and release, and is more convenient to use, and it is also more convenient to disassemble and maintain the guide pulley.

[0015] 2. The utility model provides a safety opening device for the manhole of the blast furnace for top ignition, by arranging a contact sensor on the back side of the manhole cover of the blast furnace. When the manhole cover is opened to a set angle, the manhole cover contacts the contact sensor, and the alarm sounds to remind the staff that the manhole cover is fully opened. At this time, the staff stops operating the operating handle, so that the staff can know whether the manhole cover is fully opened. At the same time, the contact sensor can be buffered by a buffer spring to avoid the problem of damage caused by direct rigid impact of the manhole cover on the contact sensor, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the structure enlargement at the center A;

[0018] Figure 3 It is an enlarged schematic diagram of the main structure of the manhole cover in the utility model.

[0019] Among them: 1- winch, 2- operating handle, 3- blast furnace, 4- lower sealing valve platform, 5- first pulley assembly, 6- second pulley assembly, 7- pull rope, 8- manhole cover, 9- contact sensor, 10- alarm, 11- hook, 12- connecting plate, 13- limit plate, 14- cross bar, 15- U-shaped frame, 16- screw, 17- locking nut, 18- limit nut, 19- mounting seat, 20- support rod, 21- sleeve, 22- mounting sleeve, 23- buffer spring, 24- guide pulley. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0021] See also Figure 1-3 The utility model provides a furnace top ignition manhole safety opening device, comprising a winch 1 and an operating handle 2, wherein the winch 1 is mounted on a lower sealing valve platform 4 on one side of a blast furnace 3, and a first pulley assembly 5 is provided on the roof directly above the winch 1, so that the pull rope of the winch 1 can be retracted and released in the vertical direction, reducing the phenomenon of the pull rope being stuck. A second pulley assembly 6 is provided on the roof between the first pulley assembly 5 and the blast furnace 3, which plays the role of a transition pull rope, and the pull rope 7 of the winch 1 passes through the first pulley assembly 5, the second pulley assembly 6 in sequence and is connected to the manhole cover 8, so that the winch 1 drives the manhole cover 8 to open; the operating handle 2 is connected to the winch 1 through a wire, and the operating handle 2 is electrically connected to the winch 1 through a controller.

[0022] Preferably, the first pulley assembly 5 has the same structure as the second pulley assembly 6, and includes a hook 11, a connecting plate 12, and a guide pulley 24, wherein one end of the hook 11 is suspended on the crossbeam of the roof, and the other end is movably plugged into the connecting plate 12, so that the hook 11 can rotate relative to the connecting plate 12, and a limit plate 13 is provided on the hook 11 below the connecting plate 12 to prevent the connecting plate 12 from falling, and a bracket is detachably provided below the connecting plate 12, and the guide pulley 24 is rotatably mounted on the bracket. Further, the bracket includes a cross bar 14 and a U-shaped frame 15, wherein the closed end of the U-shaped frame 15 is connected to the cross bar 14, and the guide pulley 24 is rotatably mounted on the open end of the U-shaped frame 15, and screws 16 are provided at both ends of the cross bar 14, and the screws 16 are movably plugged into the two ends of the connecting plate 12, and a locking nut 17 is threadedly connected to the screw 16 above the connecting plate 12, so as to realize the detachable installation of the guide pulley 24.

[0023] The utility model discloses a furnace top ignition manhole safety opening device, by arranging a winch 1 on one side of the blast furnace 3, the pull rope 7 of the winch 1 passes through the pulley assembly and is connected to the manhole cover 8, when it is necessary to open the manhole cover, the winch 1 is controlled to work by the operating handle 2, and the pull rope 7 is retracted to open the manhole cover 8, so that the operator can operate to open the manhole cover at a distance, which can effectively reduce the labor intensity and improve the operation safety; at the same time, the pulley assembly is a rotatable and detachable installation method, and as the manhole cover is opened, the guide pulley of the pulley assembly will not be stuck, which can ensure the smoothness of the pull rope retraction and release, and is more convenient to use, and it is also more convenient to disassemble and maintain the guide pulley.

[0024] Preferably, a limit nut 18 is threadedly connected to the screw rod 16 below the connecting plate 12 to prevent the guide pulley 24 from moving upward.

[0025] Preferably, a contact sensor 9 is provided on the blast furnace 3 on the back side of the manhole cover 8, and an alarm 10 is provided on the blast furnace 3, and the contact sensor 9 is electrically connected to the alarm 10 through a controller. Further, a mounting seat 19 is provided on the outer wall of the blast furnace 3 on the back side of the manhole cover 8, and two symmetrically arranged support rods 20 are provided on the mounting seat 19, and the contact sensor 9 is installed on the support rods 20 to achieve the installation of the contact sensor 9. Furthermore, a sleeve 21 is installed on the top of the two support rods 20, wherein a mounting sleeve 22 is slidably inserted in the sleeve 21, and the contact sensor 9 is installed on the mounting sleeve 22 near one end of the manhole cover 8, and a buffer spring 23 is provided in the sleeve 21, and the two ends of the buffer spring 23 are respectively connected to the sleeve 21 and the mounting sleeve 22.

[0026] The utility model provides a safe opening device for the manhole when the furnace top is ignited, by arranging a contact sensor 9 on the back side of the manhole cover 8 of the blast furnace. When the manhole cover 8 is opened to a set angle, the manhole cover 8 contacts the contact sensor 9, and the alarm 10 sounds an alarm to remind the staff that the manhole cover 8 is fully opened. At this time, the staff stops operating the operating handle 2, so that the staff can know whether the manhole cover is fully opened. At the same time, the contact sensor 9 can be buffered by the buffer spring 23 to avoid the problem of damage caused by direct rigid impact of the manhole cover on the contact sensor, which is more convenient to use.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A furnace top fire manhole safety opening device, characterized in that: The invention comprises a winch (1) and an operating handle (2), wherein the winch (1) is installed on a lower sealing valve platform (4) on one side of a blast furnace (3), a first pulley assembly (5) is provided on the roof directly above the winch (1), a second pulley assembly (6) is provided on the roof between the first pulley assembly (5) and the blast furnace (3), a pull rope (7) of the winch (1) passes through the first pulley assembly (5) and the second pulley assembly (6) in sequence and is connected to a manhole cover (8); the operating handle (2) and the winch (1) are connected via a wire, and the operating handle (2) and the winch (1) are electrically connected via a controller; a contact sensor (9) is provided on the blast furnace (3) on the back side of the manhole cover (8), an alarm (10) is provided on the blast furnace (3), and the contact sensor (9) is electrically connected to the alarm (10) via the controller.

2. A furnace top fire manhole safety opening device according to claim 1, characterized in that: The first pulley assembly (5) has the same structure as the second pulley assembly (6), and comprises a hook (11), a connecting plate (12) and a guide pulley (24). One end of the hook (11) is suspended on a crossbeam of a roof, and the other end is movably plugged into the connecting plate (12). A limiting plate (13) is provided on the hook (11) below the connecting plate (12). A bracket is detachably provided below the connecting plate (12), and the guide pulley (24) is rotatably mounted on the bracket.

3. A furnace top fire manhole safety opening device according to claim 2, characterized in that: The bracket comprises a cross bar (14) and a U-shaped frame (15), wherein a closed end of the U-shaped frame (15) is connected to the cross bar (14), and the guide pulley (24) is rotatably mounted on an open end of the U-shaped frame (15). Screws (16) are provided at both ends of the cross bar (14), and the screws (16) are movably plugged into the two ends of the connecting plate (12), and a locking nut (17) is threadedly connected to the screws (16) above the connecting plate (12).

4. A furnace top fire manhole safety opening device according to claim 3, characterized in that: A limit nut (18) is threadedly connected to the screw rod (16) below the connecting plate (12).

5. A furnace top fire manhole safety opening device according to any one of claims 1 to 4, characterized in that: A mounting seat (19) is provided on the outer wall of the blast furnace (3) on the back side of the manhole cover (8), two symmetrically arranged support rods (20) are provided on the mounting seat (19), and the contact sensor (9) is installed on the support rods (20).

6. A furnace top fire manhole safety opening device according to claim 5, characterized in that: A sleeve (21) is installed on the top of the two support rods (20), a mounting sleeve (22) is slidably inserted in the sleeve (21), the contact sensor (9) is installed on the mounting sleeve (22) near one end of the manhole cover (8), a buffer spring (23) is provided in the sleeve (21), and the two ends of the buffer spring (23) are respectively connected to the sleeve (21) and the mounting sleeve (22).

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