Coal powder weighing bin for large rotary kiln

Abstract

The present application relates to large rotary kiln technical field, especially to a kind of large rotary kiln with weighing type coal powder bin.It includes bin body, weighing system, stop block device and stop wheel device;Bin body is installed on the weighing sensor of weighing system, and the total weight of coal powder in bin body and inside is dynamically weighed by weighing system;Stop block device and stop wheel device are set at different heights outside bin body, and with the gap reserved in bin body, when bin body deviates or deflection exceeds the gap reserved, stop block device and stop wheel device block bin body from excessive deviation or deflection, and stop block device can push bin body to reset, to ensure the accuracy of weighing.The present application not only has good stability and safety, but also has accurate weighing, simple and compact structure, easy maintenance and installation, safe and reliable use and other advantages.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of large rotary kiln, in particular to a weighing type coal powder bin for large rotary kiln. BACKGROUND

[0002] Large active lime rotary kiln is used for calcining active lime or light-burned dolomite for steel and iron plants. With the development of large-scale and serialization of active lime rotary kiln, its supporting equipment is also continuously developed and innovated. When coal powder is used as fuel of the rotary kiln combustion system, a coal powder bin needs to be set to store and deliver the coal powder.

[0003] The coal powder bin in the prior art is fixedly installed, and the use amount of the coal powder can only be estimated, so that precise control cannot be achieved in the use and energy saving of energy. Therefore, there is an urgent need for a coal powder bin capable of accurately measuring the use amount of the coal powder. Since the coal powder bin is a high and large silo component, if weighing is performed, the stability and safety of the bin body must be considered first, and then the accuracy of weighing needs to be ensured. In addition, special consideration needs to be given to factors such as external wind load and vibration that affect stability. SUMMARY

[0004] In order to overcome the deficiencies of the prior art, the present application provides a weighing type coal powder bin for large rotary kiln, which has good stability and safety, accurate weighing, simple and compact structure, convenient maintenance and installation, safe and reliable use.

[0005] In order to achieve the above-mentioned purpose, the following technical solutions are adopted in the present application:

[0006] A weighing type coal powder bin for large rotary kiln, comprising a bin body, a weighing system, a stop block device and a stop wheel device; the bin body is installed on a load cell of the weighing system, and the weighing system dynamically weighs the total weight of the bin body and the coal powder inside; the stop block device and the stop wheel device are arranged at different heights on the outer periphery of the bin body and have a reserved gap with the bin body, and when the bin body deviates or tilts beyond the reserved gap, the stop block device and the stop wheel device block the bin body from deviating or tilting excessively, and the stop block device can push the bin body to reset to ensure the accuracy of weighing.

[0007] The stop block device, the stop wheel device and the load cell are all multiple and are uniformly distributed along the outer periphery of the bin body; the stop block device and the load cell are installed on the same base surface, and the stop block device and the load cell are arranged alternately; the stop wheel device is arranged above the stop block device and corresponds to the stop block device.

[0008] The upper part of the bin body is a silo, the lower part is a conical bin, the top is covered with a head, and a flange is fixedly connected to the head; the coal powder is input from the top flange and output from the bottom.

[0009] The body support is fixed to the outer wall of the body, the weighing sensor of the weighing system supports the body support, and the contact surface between the weighing sensor and the body support is an arc surface.

[0010] The upper body stop ring is fixed to the outer wall of the body, and the contact surface between the stop wheel device and the body is on the outer peripheral ring plate of the upper body stop ring.

[0011] The stop block device comprises a stop block, a sliding block, a sliding shaft and a hydraulic jack, the stop block is hinged to the sliding block, the sliding block is slidingly connected to the sliding shaft, and the hydraulic jack drives the sliding block to move along the sliding shaft.

[0012] The stop block is in a tile block structure, and the contact surface with the body is an arc surface.

[0013] The stop block device further comprises a support, a gasket, a stop bar, a base, a pressing plate and a jack fixing seat, the jack fixing seat and the support are fixed to the base, the sliding shaft is installed on the support, the gasket is installed between the support and the sliding block, the stop bar is fixed to the support, the pressing plate is fixed to the jack fixing seat, and the hydraulic jack is installed on the jack fixing seat.

[0014] The stop wheel device comprises a stop wheel, a bearing seat and a jack screw, the stop wheel is installed on the bearing, the bearing is installed on the bearing seat, and the jack screw abuts against the bearing seat to prevent the bearing seat from moving due to force.

[0015] The flow assisting system is fixed to the outer wall of the body.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1) The coal powder body of the present application is installed on the weighing sensor of the weighing system, and the total weight of the body and the coal powder inside the body can be dynamically weighed. The stop block device and the stop wheel device are arranged at different heights on the outer periphery of the body, and a certain gap is reserved between the body and the stop block device and the stop wheel device, so that the body is prevented from being excessively deviated or swung, and the hydraulic jack of the stop block device can push the body to reset, thereby ensuring the accuracy of weighing.

[0018] 2) The stop wheel of the stop wheel device can roll along with the sliding of the body, thereby reducing the vibration or noise generated by friction.

[0019] 3) The contact surface between the stop block device and the body is on the outer peripheral ring plate of the body support, and the contact surface between the stop wheel device and the body is on the outer peripheral ring plate of the upper body stop ring. The stop block device and the stop wheel device are not in direct contact with the body wall, thereby preventing the body wall from being deformed due to impact and contact.

[0020] The present application not only has good stability and safety, but also has accurate weighing, simple and compact structure, convenient maintenance and installation, safe and reliable use and the like.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic diagram of the present application;

[0022] Figure 2 is a A-A view of Figure 1 ;

[0023] Figure 3 is a B-B view of Figure 1 ;

[0024] Figure 4 is a structural schematic plan view of the stop block device of the present application;

[0025] Figure 5 is a structural schematic side view of the stop block device of the present application;

[0026] Figure 6 is a structural schematic plan view of the stop wheel device of the present application.

[0027] In the figure: 1 - silo body 2 - top flange 3 - weighing sensor 4 - silo support 5 - stop block device 51 - stop block 52 - pin shaft 53 - sliding block 54 - sliding shaft 55 - support 56 - split washer set 57 - stop bar 58 - base 59 - hydraulic jack 510 - jack fixing seat 511 - pressing plate 512 - boss 6 - stop wheel device 61 - stop wheel 62 - bearing seat 63 - jackscrew 7 - silo upper stop ring 8 - flow assisting system DETAILED DESCRIPTION

[0028] The core of the present application is to provide a weighing type coal powder silo for large rotary kiln. In order to enable those skilled in the art to better understand the present application scheme, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0029] As shown in Figures 1-6 , a weighing type coal powder silo for large rotary kiln, comprising a silo body 1, a top flange 2, a weighing system, a silo support 4, a stop block device 5, a stop wheel device 6, a silo upper stop ring 7 and a flow assisting system 8. The weighing system comprises a weighing sensor 3.

[0030] The upper part of the silo body 1 is a silo, the lower part is a conical silo, and the top is covered with a head. The top flange 2 is fixedly connected to the head, the coal powder is input from the top flange 2, and the conical silo is output at the bottom. In addition, the flanges of various detection, dust removal and safety protection equipment are also fixedly connected to the head.

[0031] The body support 4 is fixed to the outer wall of the body 1 and is located in the middle part of the body. The bottom surface of the body support 4 is supported on the weighing sensor 3 of the weighing system, and the weighing sensor 3 transmits the load variable to dynamically weigh the body 1 and the coal powder in the body. The contact surface between the weighing sensor 3 and the body support 4 is an arc surface, so that the coal powder body and the weighing sensor 3 are close to point contact. Usually, three weighing sensors 3 are arranged, and the entire coal powder body is supported by the three weighing sensors 3, i.e. three supporting points.

[0032] Therefore, when affected by external wind load, vibration and other factors, the body 1 is prone to deviation or deflection. The stop block device 5 and the stop wheel device 6 are arranged on the outer periphery of the body 1 and are provided with a certain gap with the body 1 to ensure the accuracy of weighing. When the body 1 moves or deflects beyond the reserved gap, the stop block device 5 and the stop wheel device 6 can block the body 1, and the hydraulic jack 59 of the stop block device 5 can push the body 1 back to the original position.

[0033] The flow assisting system 8 includes a compressed air pipeline and a nozzle. The compressed air pipeline is arranged at the bottom of the body 1, and the nozzle extends into the body 1. Compressed air is sprayed into the body 1 through the nozzle to prevent material accumulation and ensure smooth discharge.

[0034] The contact surface between the stop block device 5 and the body is the outer peripheral ring plate of the body support 4. The contact surface between the stop wheel device 6 and the body 1 is the outer peripheral ring plate of the upper stop ring 7 of the body. The stop block device 5 and the stop wheel device 6 do not directly contact the outer wall of the body 1, which prevents deformation of the body wall caused by impact and collision.

[0035] The stop block device 5 is used to block the deviation of the body 1 in the horizontal plane and is arranged on the outer periphery of the body support 4. Generally, 4-6 groups are uniformly arranged and are staggered with the weighing sensor 3. The stop wheel device 6 is used to block the deflection of the body 1 along the axis. It is arranged on the upper part of the body 1 and corresponds to the stop block device 5 arranged on the lower part along the outer periphery of the upper stop ring 7 of the body. Generally, 4-6 groups are uniformly arranged.

[0036] The stop block device 5 includes a stop block 51, a pin shaft 52, a sliding block 53, a sliding shaft 54, a support 55, an open gasket set 56, a stop bar 57, a base 58, a hydraulic jack 59, a pressing plate 511 and a jack fixing seat 510.

[0037] The movement of the bin body 1 is blocked by the block 51, and the hydraulic jack 59 is reserved in the block device 5. When the bin body 1 needs to be reset, the hydraulic jack 59 is put in place, and then the bin body 1 is moved and reset. The block 51 is a block-shaped structure, and the contact surface with the bin body is an arc surface. The block 51 is hinged in the middle of the sliding block 53 through the pin shaft 52. The sliding block 53 is a rectangular sliding plate with holes on both sides, and the holes are lined with bushings. Two sliding shafts 54 pass through the holes on both sides. The two ends of the sliding shaft 54 are supported on two supports 55 and fastened by nuts. Thus, the sliding block 53 is lifted by the support 55 and can translate along the sliding shaft 54, driving the block 51 to translate.

[0038] When the block 51 blocks the bin body 1, the support 55 far from the bin body 1 is stressed. An open gasket set 56 is placed between the stressed support 55 and the sliding block 53 to adjust the gap between the block 51 and the bin body 1, i.e. the displacement allowed by the bin body 1. A stop bar 57 is welded to prevent the stressed support 55 from moving under load.

[0039] The base 58 of the block device 5 is slotted on the upper surface, and the jack fixing seat 510 is embedded and fastened with bolts. The hydraulic jack 59 is installed in the jack base 510, which is cylindrical in shape and has a ring slot on the installation plane to limit the axial movement of the hydraulic jack 59. A pressing plate 511 is installed on the upper part of the hydraulic jack 59, which is fastened to the side plate of the hydraulic jack base 510 to prevent the hydraulic jack 59 from rolling under stress.

[0040] A boss 512 is provided on the end face of the sliding block 53 and is concentrically arranged with the jack screw of the hydraulic jack 59. The boss 512 and the hydraulic jack 59 have a gap and do not contact. When the bin body 1 needs to be pushed back, the jack screw of the hydraulic jack 59 is extended and presses against the boss 512, so that the sliding block 53 drives the block 51 to move along the sliding shafts 54 on both sides, thereby pushing the bin body 1 back. A hole is opened in the pressing plate 511, and the oil inlet and outlet pipes of the hydraulic jack 59 pass through it. The oil pipes are connected to the hydraulic jack 59 fittings and a manual or electric pump to control the opening, pushing speed or thrust of the hydraulic jack 59.

[0041] The wheel blocking device 6 comprises a wheel 61, a bearing seat 62 and a jackscrew 63. The wheel 61 is mounted on the bearing seat 62 by bearings. The wheel blocking device 6 is located at the upper part of the bin body 1. When the bin body 1 deviates along the center line, the deviation of the bin body at the lower block device 5 is small, so the lower block device 5 cannot limit the bin body. At this time, the wheel blocking device 6 needs to be set at the upper part to limit the deviation of the bin body 1. When the bin body deviates and contacts the wheel 61, the contact surface will slide longitudinally. In order to reduce the friction of the contact surface, the wheel 61 of the wheel blocking device 6 can roll with the sliding of the bin body 1, thereby reducing the vibration or noise generated by friction. The wheel 61 of the wheel blocking device 6 is supported by the bearing seat 62, and the double jackscrew 63 is arranged to abut against the bearing seat 62, preventing the bearing seat 62 from moving under force.

[0042] The coal bin body of the present application is installed on the weighing sensor 3 of the weighing system, and can dynamically weigh the total weight of the bin body 1 and the coal powder inside. The block device 5 and the wheel blocking device 6 are arranged at different heights of the outer periphery of the bin body, to prevent the bin body from deviating or deviating excessively, and the hydraulic jack 59 of the block device 5 can push the bin body 1 to reset, to ensure the accuracy of the weighing system.

[0043] The present application not only has good stability and safety, but also has accurate weighing, simple and compact structure, convenient maintenance and installation, safe and reliable use, and the like.

[0044] The above is only the preferred embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacements or changes to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A weighing type pulverized coal bin for a large rotary kiln, characterized by: The application relates to a coal powder weighing device, which comprises a bin body, a weighing system, a block device and a block wheel device; the bin body is installed on a weighing sensor of the weighing system, the weighing system dynamically weighs the total weight of the bin body and the coal powder in the bin body; the block device and the block wheel device are arranged at different heights in the periphery of the bin body and have a reserved gap with the bin body; when the bin body deviates or inclines beyond the reserved gap, the block device and the block wheel device prevent the bin body from deviating or inclining excessively, and the block device can push the bin body to reset, so as to ensure the accuracy of weighing. The block device, the block wheel device and the weighing sensor are multiple and are uniformly distributed along the periphery of the bin body; the block device and the weighing sensor are installed on the same base surface and are arranged staggeredly. The block wheel device is arranged above the block device and is correspondingly arranged with the block device. The application further relates to a bin body support which is fixedly connected to the outer wall of the bin body, the weighing sensor of the weighing system supports the bin body support, and the contact surface between the weighing sensor and the bin body support is an arc surface; the contact surface between the block device and the bin body is arranged on the peripheral ring plate of the bin body support. The application further relates to a bin body upper portion blocking ring which is fixedly connected to the outer wall of the bin body, and the contact surface between the block wheel device and the bin body is arranged on the peripheral ring plate of the bin body upper portion blocking ring. The block device and the block wheel device are not in direct contact with the outer wall of the bin body, so that the bin wall is prevented from being deformed due to impact and collision. The block device comprises a block, a sliding block, a sliding shaft and a hydraulic jack; the block is hingedly connected to the sliding block, the sliding block is slidingly connected to the sliding shaft, and the hydraulic jack drives the sliding block to move along the sliding shaft; the block is a tile block type structure, and the contact surface between the block and the bin body is an arc surface; the block device further comprises a support, a gasket, a blocking strip, a base, a pressing plate and a jack fixing seat; the jack fixing seat and the support are fixedly connected to the base, the sliding shaft is installed on the support, the gasket is installed between the support and the sliding block, the blocking strip is fixedly connected to the support, the pressing plate is fixedly connected to the jack fixing seat, and the hydraulic jack is installed on the jack fixing seat. The block wheel device comprises a block wheel, a bearing seat and a jack screw; the block wheel is installed on a bearing, the bearing is installed on the bearing seat, and the jack screw abuts against the bearing seat to prevent the bearing seat from moving due to force.

2. The gravimetric coal bin for a large rotary kiln according to claim 1, characterized in that: The upper portion of the bin body is a silo, the lower portion is a conical bin, the top is covered with a cover head, and a flange is fixedly connected to the cover head; the coal powder is input from the top flange and is output from the bottom.

3. The gravimetric coal bin for large rotary kiln according to claim 1, characterized in that: The application further relates to a flow assisting system which is fixedly connected to the outer wall of the bin body.

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