Blast furnace burden pulverization prevention and foreign matter prevention weighing hopper

Abstract

The utility model relates to a blast furnace burden pulverization and foreign matter prevention weighing hopper which comprises a hopper body, a first-stage blanking buffering assembly and a second-stage blanking buffering assembly are oppositely arranged in the hopper body from top to bottom at intervals, and the blanking inclination angle of the second-stage blanking buffering assembly is larger than that of the first-stage blanking buffering assembly. An impurity removal sieve assembly is arranged below the secondary blanking buffer assembly and arranged between a straight hopper and a conical hopper of the hopper body, a push-pull type impurity removal opening is formed in one side of the impurity removal sieve assembly and formed in one side of a connecting cover, the connecting cover is fixed between the straight hopper and the conical hopper, a supporting frame and a sieve plate are arranged in the connecting cover, and the sieve plate is arranged on the supporting frame. The multiple damping seats are arranged on the two sides of the supporting frame, one end of the supporting frame is arranged on the supporting seat in a sleeving mode, the other end of the supporting frame is supported on the impurity removing opening, the impurity removing opening is pushed and pulled to drive the supporting frame to rotate up and down around the supporting seat, foreign matter intercepted on the sieve plate can be conveniently removed, and the device is reasonable in structure and convenient to use, furnace charge pulverization is effectively prevented, and meanwhile the foreign matter in the furnace charge is intercepted.

Description

TECHNICAL FIELD

[0001] The utility model relates to a blast furnace feeding technology field, concretely is a blast furnace anti -furnace material pulverization anti -foreign weighing hopper. BACKGROUND

[0002] The weighing hopper of blast furnace is set in the weighing device of blast furnace feeding system, and the blast furnace charge is released to the conveying belt after being weighed, and the blast furnace charge is mixed with the dropped barb strip, steel structure material and other sundries in the conveying process, and the sundries are easily stuck between the discharge port of the weighing hopper and the belt, causing the belt to be scratched and damaged, and with the gradual large-scale of blast furnace, the weighing hopper of blast furnace is also increased in size and height, and the distance between the bottom of the weighing hopper and the upper vibration screen is larger and larger, and the blast furnace charge is easily pulverized in the vibration process from the vibration screen to the weighing hopper, and the pulverized blast furnace charge produces a lot of dust dispersed into the air, greatly affecting the production environment; Chinese patent CN220393788U discloses a blast furnace tank under weighing hopper, which reduces the secondary crushing of blast furnace charge caused by too large falling difference, and further reduces the abnormal production and operation of blast furnace caused by a large amount of powder generated by blast furnace charge falling. UTILITY MODEL CONTENTS

[0003] The utility model aims at providing a blast furnace anti -furnace material pulverization anti -foreign weighing hopper to solve the problems in the above background.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] A blast furnace anti -furnace material pulverization anti -foreign weighing hopper, including the hopper body, the hopper body is from top to bottom interval and sets up a first level of material falling buffer assembly and secondary material falling buffer assembly, the material falling angle of secondary material falling buffer assembly is greater than the material falling angle of first level of material falling buffer assembly, the lower portion of secondary material falling buffer assembly is provided with a sundry removal screen assembly, one side of sundry removal screen assembly is provided with a push -pull type sundry removal port.

[0006] The above blast furnace anti -furnace material pulverization anti -foreign weighing hopper, the hopper body includes straight hopper and cone hopper, and the sundry removal screen assembly is arranged between the straight hopper and the cone hopper.

[0007] The foreign matter weighing hopper for preventing material pulverization of blast furnace, the impurity removing screen assembly includes a connecting cover fixedly connected with the straight hopper and the conical hopper, the impurity removing opening is arranged on one side of the connecting cover, a supporting frame and a screen plate are arranged in the connecting cover, the screen plate is arranged on the supporting frame, and a plurality of damping seats are arranged on both sides of the supporting frame.

[0008] The foreign matter weighing hopper for preventing material pulverization of blast furnace, one end of the supporting frame is sleeved on the supporting seat, and the other end is supported on the impurity removing opening, and the impurity removing opening can drive the supporting frame to rotate up and down around the supporting seat by being pushed and pulled.

[0009] The foreign matter weighing hopper for preventing material pulverization of blast furnace, the impurity removing opening includes a surrounding plate, the surrounding plate is arranged on one side of the connecting cover in a U shape, the inner sides of the two side walls of the U shape are movably connected with the connecting cover through sliding rails, the inner side of the bottom of the U shape is supported by an inclined supporting block, and the outer side of the bottom of the U shape is provided with a handle for pushing and pulling.

[0010] The foreign matter weighing hopper for preventing material pulverization of blast furnace, the screen plate is a plurality of round steels arranged in linear arrays along the longitudinal direction and the transverse direction respectively, the round steels are placed on the supporting frame in longitudinal and transverse overlap, and the end portions of the round steels are fixed to the supporting frame through U-shaped bolts.

[0011] The foreign matter weighing hopper for preventing material pulverization of blast furnace, the supporting frame is a frame body formed by butt welding of angle steels, the butt joint grooves are arranged in the connecting cover with the openings upward, and the round steels are fixed in the grooves through the U-shaped bolts.

[0012] The foreign matter weighing hopper for preventing material pulverization of blast furnace, the screen plate is an integral grid plate, and the grid plate is fixed on the top of the supporting frame through bolts.

[0013] The foreign matter weighing hopper for preventing material pulverization of blast furnace, the supporting frame is a frame body formed by butt welding of rectangular tubes, and the grid plate is arranged on the top of the frame body.

[0014] The foreign matter weighing hopper for preventing material pulverization of blast furnace, spring return devices are arranged between the first-stage material falling buffer assembly, the second-stage material falling buffer assembly and the hopper body.

[0015] The foreign matter weighing hopper for preventing material pulverization of blast furnace, the first-stage material falling buffer assembly and the second-stage material falling buffer assembly each include a buffer plate and a spring return device, the spring return device is arranged between the buffer plate and the hopper body in an inclined manner, and the buffer plate is uniformly provided with powder leakage holes.

[0016] The beneficial effects generated by the above technical solutions are:

[0017] The utility model provides a kind of blast furnace anti-charge pulverization anti-foreign weighing hopper, first-stage material falling buffer assembly and second-stage material falling buffer assembly are used to slow down the speed of charge falling from top to bottom in the hopper body, which can prevent the impact pulverization caused by too fast falling speed of charge, and the material falling hole is arranged on the buffer plate surface to make the fine particles in charge directly slide down without further refining due to impact, the material falling inclination of second-stage material falling buffer assembly is greater than that of first-stage material falling buffer assembly, which can avoid the accumulation and blockage of charge in two-stage material falling deceleration, the impurity removal screen assembly is arranged below second-stage material falling buffer assembly, which can intercept foreign matter in charge to prevent scratching lower conveying belt, the push-pull type impurity removal opening is arranged on one side of impurity removal screen assembly, the impurity removal opening is supported below screen plate, the impurity removal opening is pulled out to rotate and incline downward, which is convenient for operator to clean the intercepted foreign matter on screen plate, the structure of the present application is reasonable and convenient to use, which effectively prevents charge pulverization and intercepts foreign matter in charge. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0019] Figure 2 It is the lateral structure sectional view (including local enlarged view) of the utility model;

[0020] Figure 3 It is the front view structure sectional view of embodiment 1 of the utility model;

[0021] Figure 4 It is the plan structure sectional view of embodiment 1 of the utility model;

[0022] Figure 5 It is the front view structure sectional view of embodiment 2 of the utility model;

[0023] Figure 6 It is the plan structure sectional view of embodiment 2 of the utility model.

[0024] In the drawing: 1, hopper body; 1-1, straight hopper; 1-2, conical hopper; 2, first-stage material falling buffer assembly; 3, second-stage material falling buffer assembly; 23, buffer plate; 32, spring restorer; 4, impurity removal screen assembly; 4-1, impurity removal opening; 4-1-1, coaming; 4-1-2, inclined support block; 4-1-3, handle; 4-2, connecting cover; 4-3, support frame; 4-3-1, support seat; 4-4, screen plate; 4-5, shock-absorbing seat; 4-6, slide rail. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model is clearly and completely described below with specific examples.

[0026] As Figures 1 to 6The illustrated blast furnace anti-furnace material powdering foreign matter weighing hopper comprises a hopper body 1, a first-stage material falling buffer assembly 2 and a second-stage material falling buffer assembly 3 are oppositely arranged in the hopper body 1 from top to bottom, for slowing down the speed of the furnace material falling from the vibrating screen, the material falling angle of the second-stage material falling buffer assembly 3 is greater than that of the first-stage material falling buffer assembly 2, which is conducive to the furnace material falling from the second-stage material falling buffer assembly 3 after being slowed down, avoiding the furnace material piling up on the second-stage material falling buffer assembly 3 due to slowing down and causing blockage; a foreign matter removing screen assembly 4 is arranged below the second-stage material falling buffer assembly 3, for removing foreign matters in the furnace material and preventing the transport belt below the weighing hopper from being scratched; a push-pull type foreign matter removing opening 4-1 is arranged on one side of the foreign matter removing screen assembly 4, after being pulled out, the inner screen plate is downwardly turned and inclined, facilitating the operator to remove the intercepted foreign matters on the screen plate.

[0027] As shown in the drawings, Figures 2 to 6 The hopper body 1 comprises a straight hopper 1-1 and a conical hopper 1-2, the foreign matter removing screen assembly 4 is arranged between the straight hopper 1-1 and the conical hopper 1-2 and is connected and fixed with the straight hopper 1-1 and the conical hopper 1-2 through bolts, the foreign matter removing screen assembly 4 comprises a movable connecting cover 4-2 and a foreign matter removing opening 4-1, the connecting cover 4-2 is fixedly connected with the straight hopper 1-1 and the conical hopper 1-2, and the foreign matter removing opening 4-1 is arranged on one side of the connecting cover 4-2; a support frame 4-3 and a screen plate 4-4 are arranged in the connecting cover 4-2, the screen plate 4-4 is arranged on the support frame 4-3, a plurality of shock-absorbing seats 4-5 are arranged on both sides of the support frame 4-3, and the shock-absorbing seats are used for reducing the influence of the falling impact force on the connecting cover 4-2; a support seat 4-3-1 and an inclined support block 4-1-2 are arranged at the bottom of the support frame 4-3, one end of the support frame 4-3 is sleeved on the support seat 4-3-1, and the other end is supported on the foreign matter removing opening 4-1, and the push-pull foreign matter removing opening 4-1 can drive the support frame 4-3 to turn up and down around the support seat 4-3-1.

[0028] The foreign matter removing opening 4-1 comprises a surrounding plate 4-1-1, the surrounding plate 4-1-1 and the connecting cover 4-2 are both in U shape, the surrounding plate 4-1-1 is arranged on one side of the connecting cover 4-2 and can be closed to form a rectangular frame body; a slide rail 4-6 is arranged on the inner side of the U-shaped side wall of the surrounding plate 4-1-1, the surrounding plate 4-1-1 is movably connected with the connecting cover 4-2 through the slide rail 4-6, the surrounding plate 4-1-1 can be pushed and pulled along the slide rail 4-6, an inclined support block 4-1-2 is arranged on the inner side of the U-shaped bottom of the surrounding plate 4-1-1 and supports at the bottom of the support frame 4-3, a handle 4-1-3 for pushing and pulling is arranged on the outer side of the U-shaped bottom of the surrounding plate 4-1-1, pulling the handle 4-1-3 outwardly makes the surrounding plate 4-1-1 and the inclined support block 4-1-2 slide outwardly along the slide rail 4-6, the support frame 4-3 turns downwardly and inclines around the support seat 4-3-1, which is conducive to the foreign matters on the screen plate 4-4 sliding outwardly and facilitates the operator to clean the intercepted foreign matters on the screen plate 4-4.

[0029] The first material falling buffer assembly 2 and the second material falling buffer assembly 3 each comprise a buffer plate 23 and a spring return 32, the buffer plate 23 is hinged at the top to the hopper body 1, and the spring return 32 is obliquely arranged between the buffer plate 23 and the hopper body 1, so that the buffer plate 23 keeps a set falling angle of the furnace charge, and the buffer plate 23 can rotate under the impact force of the falling furnace charge, so as to reduce the pulverization degree of the furnace charge caused by the impact force, and meanwhile, ensure that no material accumulation occurs in the weighing hopper.

[0030] As shown in Figure 3 and Figure 4 , the screen plate 4-4 in example 1 is a plurality of round steels arranged in linear array along the longitudinal and transverse directions respectively, the round steels are placed on the support frame 4-3 in longitudinal and transverse overlap, and the end portions of the round steels are fixed on the support frame 4-3 by U-shaped bolts. The support frame 4-3 is a frame body welded by angle steels, the opening of the splicing groove of the support frame 4-3 is arranged upward in the connecting cover 4-2, and the round steels are fixed in the groove by U-shaped bolts. The U-shaped bolt fixing can flexibly change the spacing of the round steels. Alternatively, the round steels can be welded on the support frame 4-3, and the whole can be replaced when necessary.

[0031] As shown in Figure 5 and Figure 6 , the screen plate 4-4 in example 2 is an integral grid plate, the grid plate is fixed on the top of the support frame 4-3 by bolts, and the support frame 4-3 is a frame body welded by rectangular tubes. The grid plate is arranged on the top of the frame body, and the upper surface of the grid plate is smooth, which is more convenient for cleaning and intercepting sundries.

[0032] Work flow: The furnace charge sliding down from the vibrating screen enters the hopper body from the feeding port of the weighing hopper. Due to the multiple effects of gravity and the sliding falling angle of the vibrating screen, the furnace charge first falls on the first material falling buffer assembly, slows down by the damping of the first material falling buffer assembly, and changes the sliding falling angle of the furnace charge. The furnace charge slides to the second material falling buffer assembly, slows down again by the second material falling buffer assembly, and then slides down to the impurity removal sieve assembly. The impurity removal sieve assembly removes the sundries in the furnace charge, and the furnace charge falls on the conveying belt below the weighing hopper, so as to avoid scratching and damaging the conveying belt by the sundries and to avoid the furnace charge directly sliding from a higher position to generate more impact dust. The buffer plates of the first material falling buffer assembly and the second material falling buffer assembly are provided with relatively fine material falling holes, so that the fine particles in the furnace charge can directly fall down, and the fine particles are not further pulverized by impact, thereby further reducing the impact dispersion degree of the dust.

[0033] In this paper, the principle and implementation mode of the present application are described in detail by using specific examples. The above examples are only used to help understand the method and its core idea of the present application. Those skilled in the art can modify the technical solutions recorded in the foregoing examples or replace some technical features equivalently. The modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A weighing hopper for preventing pulverization of furnace charge and foreign matter in blast furnaces, characterized in that: The device includes a bucket body (1), and a primary material feeding buffer assembly (2) and a secondary material feeding buffer assembly (3) are arranged in the bucket body (1) from top to bottom facing each other. The material feeding angle of the secondary material feeding buffer assembly (3) is greater than that of the primary material feeding buffer assembly (2). A cleaning screen assembly (4) is arranged below the secondary material feeding buffer assembly (3), and a push-pull cleaning port (4-1) is arranged on one side of the cleaning screen assembly (4).

2. The blast furnace weighing hopper for preventing pulverization of furnace charge and foreign matter according to claim 1, characterized in that: The bucket body (1) includes a straight bucket (1-1) and a conical bucket (1-2), and the impurity removal screen assembly (4) is disposed between the straight bucket (1-1) and the conical bucket (1-2).

3. A blast furnace weighing hopper for preventing pulverization of furnace charge and foreign matter as described in claim 2, characterized in that: The impurity removal screen assembly (4) includes a connecting cover (4-2) fixedly connected to the straight bucket (1-1) and the conical bucket (1-2). The impurity removal port (4-1) is located on one side of the connecting cover (4-2). A support frame (4-3) and a screen plate (4-4) are provided inside the connecting cover (4-2). The screen plate (4-4) is located on the support frame (4-3). Multiple shock-absorbing seats (4-5) are located on both sides of the support frame (4-3).

4. A blast furnace weighing hopper for preventing pulverization of furnace charge and foreign matter as described in claim 3, characterized in that: One end of the support frame (4-3) is placed on the support base (4-3-1), and the other end is supported on the cleaning port (4-1). Pushing and pulling the cleaning port (4-1) can drive the support frame (4-3) to rotate up and down around the support base (4-3-1).

5. A blast furnace weighing hopper for preventing pulverization of furnace charge and foreign matter as described in claim 4, characterized in that: The cleaning port (4-1) includes a surrounding plate (4-1-1), which is U-shaped and arranged on one side of the connecting cover (4-2). The inner sides of the two side walls of the U-shape are provided with slide rails (4-6) that are movably connected to the connecting cover (4-2). The inner side of the bottom of the U-shape is provided with an inclined support block (4-1-2) that supports the bottom of the support frame (4-3). The outer side of the bottom of the U-shape is provided with a handle (4-1-3) for pushing and pulling.

6. A blast furnace weighing hopper for preventing pulverization of furnace charge and foreign matter as described in claim 5, characterized in that: The sieve plate (4-4) consists of multiple round steel bars arranged in a linear array along the longitudinal and transverse directions. The round steel bars are placed on the support frame (4-3) with their longitudinal and transverse overlaps, and their ends are fixed to the support frame (4-3) by U-bolts.

7. A blast furnace weighing hopper for preventing pulverization of furnace charge and foreign matter as described in claim 6, characterized in that: The support frame (4-3) is a frame made of angle steel welded together. Its splicing groove opening is set inside the connecting cover (4-2) with the opening facing upward. The round steel is fixed in the groove by the U-bolt.

8. A blast furnace weighing hopper for preventing pulverization of furnace charge and foreign matter as described in claim 5, characterized in that: The sieve plate (4-4) is an integral grid plate, which is fixed to the top of the support frame (4-3) by bolts.

9. A blast furnace weighing hopper for preventing pulverization of furnace charge and preventing foreign matter as described in claim 8, characterized in that: The support frame (4-3) is a frame made of rectangular tubes welded together, and the grid plate is set on the top of the frame.

10. A blast furnace weighing hopper for preventing pulverization of furnace charge and preventing foreign matter as described in claim 7 or 9, characterized in that: Both the primary material feeding buffer assembly (2) and the secondary material feeding buffer assembly (3) include a buffer plate (23) and a spring reset device (32). The spring reset device (32) is inclinedly disposed between the buffer plate (23) and the hopper (1). The buffer plate (23) is evenly distributed with powder leakage holes.

Images