Emergency anti-falling device for personnel to lift up and down in chimney mould lifting process

Abstract

An emergency anti-falling device for personnel to lift up and down in a chimney mould lifting process comprises a fixing plate, two hub gears, two anti-falling rods and a gear pull rod, and is characterized in that the fixing plate (1) is a rectangular plate block, a round hole is formed in each of the two sides of the center in the length direction of the fixing plate, the thickness of each of the two hub gears (2) is 20 mm, and the gear pull rod is connected with the two hub gears (2). The two anti-falling rods (4) are rectangular strip-shaped steel plates, and the gear pull rod (5) is a rectangular steel plate with the thickness of 20 mm, the width of 60 mm and the length of 500 mm. The emergency anti-falling device has the advantages that manufacturing is easy and convenient, cost is low, operation is convenient and fast, the safety guarantee coefficient of the chimney mold lifting process personnel during vertical lifting is increased, accidents are better avoided and reduced, and according to different suspension cage sizes and different use scenes, the safety of the personnel is improved. The size of each part can be flexibly adjusted; and the application range can be expanded.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of building construction, in particular, it is an emergency anti-falling device for personnel ascending and descending in the chimney lifting mold process. BACKGROUND

[0002] The chimney is an essential structure in the coking construction project. Its main function is to generate suction through the chimney effect, to exhaust combustion waste gas and introduce combustion air, and to maintain the continuous operation of the coke oven heating system and the diffusion of pollutants.

[0003] Most of the coke oven chimney construction adopts the "lifting mold" construction process, which mainly consists of a central shaft, an operating platform, a cage, a mast, an inner and outer operating hanger, an inner and outer formwork, and a lifting device. After the first layer of concrete is poured, the outer formwork is lifted using the operating platform (the platform is lifted using a certain number of evenly arranged hand-operated hoists hung on the shaft) to move the formwork to the next layer of cylinder wall construction position (the platform lifting height is about 1.25m). After the inner formwork (one block presses one block) is installed for one layer and one week, it is supported by wooden blocks on the other side. With the rising of the construction platform, the concrete is continuously poured, the steel bars are tied, and the formwork is installed, and the construction is repeated until the design height is reached.

[0004] During the construction process of the chimney lifting mold process, the workers will go up and down between the operating platform and the ground through the intermediate cage. The cage lifting is mainly through a fixed pulley at the top of the tower, a 5-ton winch and a steel wire rope to lift and drop. The size of the cage is 3.0m x 1.0m x 1.0m. Anti-falling devices are provided on both sides of the top of the cage, and limiters are provided at the shaft slide to prevent the cage from falling and colliding.

[0005] Therefore, the known anti-falling measures need to be further strengthened. SUMMARY

[0006] The purpose of the present application is to add an "insurance" layer to the anti-falling device of the cage itself, and to provide a safe and reliable emergency anti-falling device for personnel ascending and descending in the chimney lifting mold process.

[0007] To achieve the above purpose, the technical solution of the present application is: An emergency anti-falling device for personnel ascending and descending in the chimney lifting mold process, comprising a fixed plate, two pivot gears, two anti-falling rods and a gear pull rod, characterized in that: The fixed plate is a rectangular plate, and a circular hole is provided on each side of the center of the fixed plate, and a center shaft is provided in the circular hole. The thickness of the two pivot gears is 20mm, one side of the pivot gear is 2 / 3 of the thickness and is machined into a spur gear, the gear has 18 teeth, and the full tooth depth is 6.75mm; the other side of the pivot gear is 1 / 3 of the thickness and is a circular table, the center of the two pivot gears is provided with a pivot gear through hole, and the pivot gear through hole is fixedly welded with the center rotating shaft; The two anti-falling rods are each a rectangular strip-shaped steel plate, one end of the rectangular strip-shaped steel plate is provided as a circular arc with a radius of 50mm, and the circular arc end of the rectangular strip-shaped steel plate is fixedly welded with the edge of the circular table; The gear pull rod is a rectangular steel plate with a thickness of 20mm, a width of 60mm, and a length of 500mm, the gear part of the gear pull rod is 300mm long, the non-gear part is 200mm long, the gear size and the gear size of the pivot gear are closely engaged with each other, so that the gear pull rod and the gears of the pivot gears arranged on both sides operate smoothly; a through hole is arranged at the end of the non-gear part, a connecting rope is arranged in the through hole, and a pull ring is arranged at one end of the connecting rope; a gear pull rod anti-falling plate is fixedly welded at one end of the gear part of the gear pull rod, the gear pull rod anti-falling plate is a strip-shaped steel plate, the lower surface of the strip-shaped steel plate is fixedly welded with the end of the gear pull rod, and the gear pull rod anti-falling plate is connected with the gear pull rod to form an integral whole, so as to avoid the gear pull rod from being pulled off by manual operation.

[0008] The emergency anti-falling device for personnel ascending and descending in the chimney lifting mold process of the present application can also be further realized by the following technical measures.

[0009] The emergency anti-falling device for personnel ascending and descending in the chimney lifting mold process of the present application can also be further realized by the following technical measures.

[0010] The emergency anti-falling device for personnel ascending and descending in the chimney lifting mold process of the present application can also be further realized by the following technical measures.

[0011] After adopting the above technical scheme, the emergency anti-falling device for personnel ascending and descending in the chimney lifting mold process of the present application has the following advantages: 1. The anti-falling device is simple to manufacture, low in cost, and convenient and fast to operate; 2. The safety guarantee factor of personnel ascending and descending in the chimney lifting mold process is improved, and accidents are better avoided and reduced; 3. The size of each component can be flexibly adjusted according to different cage sizes and different use scenarios, and the use range can be expanded. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a structural schematic view of the anti-falling device of the embodiment of the present application; Fig. 2 It is a schematic view of pulling the connecting rope to start and open the two anti-falling rods; Fig. 3This is a schematic diagram of two anti-fall rods fully opened according to an embodiment of the present invention. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the embodiments and the accompanying drawings.

[0014] Example 1 The Xianfu Coking Project in Yuxi, Yunnan, involves the construction of a new 2×46-cell, 6.25m reheating ramming coke oven. The chimney is 160m tall and constructed of reinforced concrete, with a bottom radius of 6.750m and an outer outlet radius of 3.575m. The chimney was constructed using a tool-type formwork "lifting" technique, with each form approximately 1.25m high.

[0015] Chimney formwork construction process: familiarize yourself with the drawings → three connections and one leveling → acceptance of materials and equipment upon arrival → installation of shaft frame and operating platform → inner formwork → tying vertical reinforcement → tying circular reinforcement → installing outer formwork → pouring concrete (1.25m) → removing inner and outer formwork → lifting platform to (n+1.25m) → cleaning and oiling → installing (n+1) section inner formwork → fixing inner formwork support → adjusting radius → tying circular reinforcement → installing outer formwork → correcting radius and wall thickness → tying outer hoop → pouring (n+1) section concrete → the above cycle → assembling inner lining platform → inner lining masonry → installing accessories → painting aviation marking paint → removing lifting system → completion acceptance.

[0016] During the fabrication and installation of the chimney derrick cage and emergency fall arrest system, the chimney derrick is typically constructed from angle steel. The four vertical main steel bars measure L100*10mm, the horizontal angle steel measures L63*6mm, and the diagonal angle steel measures L63*6mm. A single derrick section measures 3.0m×1.05m×1.05m. The welded angle steel ends have holes for bolting the upper and lower sections together. The cage, welded from L63*6mm angle steel, measures 2.4m×0.8m×0.8m. Two sides are sealed with 3mm-thick steel plates, while the other two sides are open for personnel entry and exit. A 400mm-high groove is located at the bottom, and a double-channel steel beam and fixed pulley are welded to the top of the cage to thread the wire rope used for lifting and lowering. Anti-fall devices and slide rail locks are installed on both sides of the top of the cage, so that the cage can slide along the longitudinal track during the up and down process. The anti-fall device plays an emergency anti-fall role. There is also a limiter at the slide to prevent the cage from "hitting the top".

[0017] The emergency anti-falling device for personnel lifting up and down in the chimney mould lifting process of the present invention is welded and installed on the top crossbeam inside the cage, so that the cage has a "double insurance" effect.

[0018] Please refer to Figs. 1-3 The emergency anti-falling device for personnel lifting up and down in the chimney mold lifting process of the present invention includes a fixed plate, two hub gears, two anti-falling rods, and a gear pull rod.

[0019] The fixing plate 1 is a rectangular plate, and a circular hole is provided on both sides of the length of the fixing plate toward the center, and a central rotating shaft 3 is provided in the circular hole; the diameter of the circular hole is 15 mm.

[0020] The thickness of the two hub gears 2 is 20 mm respectively. 2 / 3 of the thickness of one side of the hub gear is machined into a spur gear shape. The gear has 18 teeth and a full tooth depth of 6.75 mm. 1 / 3 of the thickness of the other side of the hub gear is a frustum. A hub gear through hole is provided in the center of each of the two hub gears, and the hub gear through hole is welded to the central rotating shaft.

[0021] The two anti-fall rods 4 are respectively rectangular strip steel plates, one end of which is set to be an arc with a radius of 50 mm, and the arc end of the rectangular strip steel plate is welded to the edge of the truncated cone.

[0022] The gear lever 5 is a rectangular steel plate 20mm thick, 60mm wide, and 500mm long. The gear portion of the gear lever is 300mm long, while the gearless portion is 200mm long. The gear dimensions closely match those of the hub gear 2, ensuring smooth operation between the gear lever and the hub gears located on either side. A through hole is provided at the end of the gearless portion, through which a connecting rope 7 is passed. A pull ring 8 is provided at one end of the connecting rope. A gear lever anti-slip plate 6 is welded to one end of the gear portion of the gear lever. The anti-slip plate is a strip of steel plate, the lower surface of which is welded perpendicularly to the end of the gear lever 5. The anti-slip plate is integrally connected to the gear lever to prevent the lever from being pulled off when manually pulled. The effective tooth depth of the gear is 6mm.

[0023] Example 2 The manufacturing method of the emergency anti-falling device for lifting personnel up and down in the chimney mold lifting process of the present invention: Step 1: Cut a 400mm×200mm rectangular plate from a 20mm thick steel plate to make a fixed plate. Make holes in the fixed plate symmetrically at a distance of 75mm on both sides of the horizontal center line of the fixed plate. The hole diameter is 15mm.

[0024] Step 2: Process a 20mm thick steel plate into a 100mm diameter circle. A 15mm hole is drilled in the center of the circular plate. The outer two-thirds of the plate is machined into a spur gear shape. This is manufactured to a 3mm module with 18 teeth, a full tooth depth of 6.75mm, and an effective tooth depth of 6mm. This completes the hub gear ring.

[0025] Step 3: Cut a 20mm thick steel plate into a 550mm x 70mm rectangular strip, and machine the end into a 50mm radius arc to complete the anti-fall rod.

[0026] Fourth step: the arc end of the anti-falling rod is welded with the pivot gear, the position of the pivot gear is noticed, and the rotation of the pivot gear can ensure that the anti-falling rod is completely unfolded to play a supporting role.

[0027] Fifth step: a central rotating shaft matched with the φ15 opening on the fixed welding plate is selected, the central rotating shaft is inserted into the opening on the fixed welding plate, and the pivot gear welded with the anti-falling rod is fixed on the fixed plate through the central rotating shaft.

[0028] Sixth step: the third step, the fourth step and the fifth step are repeated to produce the anti-falling rod on the other side and install the anti-falling rod on the other side of the fixed welding plate.

[0029] Seventh step: a rectangular steel plate with a thickness of 20 mm, a width of 60 mm and a length of 500 mm is used to produce a gear pull rod, the gear part has a length of 300 mm, the non-gear part has a length of 200 mm, the gear size and the gear size of the pivot gear ring are closely engaged with each other, and smooth operation is ensured. A φ10 mm hole is opened at a distance of about 30 mm from the end of the non-gear part for passing through and binding the connecting rope.

[0030] Eighth step: a strip-shaped steel plate with a thickness of 20 mm, a width of 30 mm and a length of 150 mm is welded at the outer end of the gear pull rod as a gear pull rod anti-falling plate, which is connected with the gear pull rod as a whole to avoid the gear pull rod from being pulled off by manual operation.

[0031] Ninth step: a 14 mm thick plywood template is used as a raw material, an outer circle with a diameter of 150 mm is cut, an inner circle with a diameter of 120 mm is cut, then the center circular template is taken off, and a hand-pulled ring is processed and made, and the hand-pulled ring is made by covering rubber.

[0032] Tenth step: a 10 gauge iron wire with a diameter of about 3.4 mm is used as a connecting rope, one end of the connecting rope is bound and fixed on the gear pull rod, and the other end is bound and fixed on the hand-pulled ring.

[0033] Eleventh step: the whole "emergency anti-falling" device formed by the above steps is welded and fixed on the channel steel on the inner side of the cage through the fixed plate, machine oil is applied to all gear parts, and manual operation test is carried out to ensure smoothness.

[0034] Example 3 The operation and use method of the emergency anti-falling device for personnel ascending and descending in the chimney lifting mold process of the application: Before the cage is lifted, the cage rope, the anti-falling device, the guide rail, the position limiter and the emergency anti-falling device are comprehensively checked.When an emergency occurs, the pull ring can be manually pulled downward, the connecting rope pulls the gear pull rod downward, the gear on the gear pull rod engages with the pivot gear ring, the pivot gear ring rotates, the anti-falling rod rotates, and the anti-falling rod changes from a vertically contracted state to a horizontally expanded state, and the anti-falling rod is extended out of the cage, and the length of the anti-falling rod is placed on the derrick angle steel, the material strength of the anti-falling rod is used to bear the weight of the cage and personnel and the downward impact force, and accidents are prevented.

[0035] The emergency anti-falling device for personnel lifting in the chimney template lifting process is welded to the cross beam at the top of the cage through the fixing plate, and is fixed on the cross beam in the cage. The operation is simple, and only the hand pull ring needs to be pulled downward, then the gear pull rod is pulled downward, the gear is engaged and rotated to transmit to the pivot gear ring, the anti-falling rod changes from a vertically contracted state to a horizontally expanded state, and the anti-falling rod is placed on the external derrick, and the material strength of the anti-falling rod is used to bear the weight of the cage, personnel and downward impact force, so that falling accidents are avoided.

[0036] The emergency anti-falling device for personnel lifting in the chimney template lifting process can be flexibly adjusted in length according to different cage sizes, is convenient to operate and use, and can more effectively ensure the safety of personnel lifting.

[0037] The emergency anti-falling device for personnel lifting in the chimney template lifting process has substantial features and significant technical progress, and compared with the prior art, the anti-falling device is simple to manufacture, low in cost, convenient and fast to operate, improves the safety factor of personnel lifting in the chimney template lifting process, better avoids and reduces accidents, can flexibly adjust the size of each component according to different cage sizes and different use scenarios, and can expand the use range.

[0038] The emergency anti-falling device for personnel lifting in the chimney template lifting process is used in the Yunnan Xianfu coke oven project, more effectively ensures the personal safety of operating personnel during lifting, avoids and reduces safety accidents. The emergency anti-falling device is simple to manufacture, simple to operate and low in cost, can be flexibly adjusted in size according to different scenarios, has certain popularization significance, and is unanimously praised by all parties for safety awareness and innovation awareness.

[0039] The above examples are only used to illustrate the present application, and are not limited to the present application. Those skilled in the art can make various transformations or changes without departing from the spirit and scope of the present application. Therefore, all equivalent technical solutions should belong to the scope of the present application, and should be limited by the claims.

Claims

1. A chimney lifting process personnel up and down the emergency anti-falling device, comprising a fixed plate, two pivot gears, two anti-falling rods, gear pull rod, characterized in that: the fixed plate (1) is a rectangular plate, and the fixed plate length is provided with a circular hole on each side of the center, and the circular hole is provided with a center shaft (3); the thickness of the two pivot gears (2) is 20mm, and one side of the pivot gear is 2 / 3 of the thickness, which is machined into a spur gear, and the gear is provided with 18 teeth, and the full tooth depth is 6.75mm; the other side of the pivot gear is 1 / 3 of the thickness, which is a circular table, and the center of the two pivot gears is provided with a pivot gear through hole, and the pivot gear through hole is solid welded with the center shaft; the two anti-falling rods (4) are each a rectangular strip steel plate, one end of the rectangular strip steel plate is provided with a circular arc, the radius of the circular arc is 50mm, and the circular arc end of the rectangular strip steel plate is solid welded with the edge of the circular table; the gear pull rod (5) is a rectangular steel plate with a thickness of 20mm, a width of 60mm and a length of 500mm, the gear pull rod is provided with a gear part with a length of 300mm and a non-gear part with a length of 200mm, the gear size and the gear size of the pivot gear (2) are closely engaged with each other, so that the gear pull rod and the gears of the pivot gears provided on both sides operate smoothly; a through hole is provided at the end of the non-gear part, a connecting rope (7) is arranged in the through hole, one end of the connecting rope is provided with a pull ring (8); one end of the gear part of the gear pull rod is solid welded with a gear pull rod anti-dropping plate (6), the gear pull rod anti-dropping plate is a strip steel plate, the lower surface of the strip steel plate is solid welded with the end of the gear pull rod (5) vertically, the gear pull rod anti-dropping plate and the gear pull rod are connected into an integral whole, so as to avoid the gear pull rod from being pulled off by manual operation.

2. The emergency fall arrest device for personnel ascending or descending a chimney formwork process according to claim 1, characterized in that, The diameter of the circular hole is ≥15mm.

3. The emergency fall arrest device for personnel ascending or descending a chimney formwork process as claimed in claim 1, wherein, The effective tooth depth of the gear is 6mm.

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