Hydraulic breaker shut-off door

Abstract

The present invention discloses a hydraulic crushing shut-off door, which belongs to the technical field of boiler slag removal equipment, and comprises a mounting frame arranged at the bottom of a slag pit, and two parallel side frames of the mounting frame are provided with a pair of extrusion components capable of relative reciprocating motion, and the extrusion component comprises an extrusion head, a box body and a push hydraulic cylinder, the box body is connected to the piston rod of the push hydraulic cylinder, the push hydraulic cylinder is arranged outside the mounting frame, the extrusion head is connected to the box body and both are arranged inside the mounting frame, and telescopic crushing mechanisms are arranged on the opposite surfaces of the extrusion heads on both sides. The present invention pre-impacts and crushes large slag blocks that fall to the bottom of the slag pit by arranging telescopic crushing mechanisms on the opposite surfaces of the extrusion heads on both sides, and then starts the hydraulic cylinder to drive the boxes and extrusion heads on both sides to move relative to each other, and performs secondary extrusion and crushing on the slag blocks, so as to achieve the purpose of crushing overly large slag blocks and avoid slag accumulation at the bottom of the slag pit.

Description

Technical Field

[0001] The invention belongs to the technical field of boiler slag removal equipment, and in particular relates to a hydraulic crushing shut-off door. Background Art

[0002] At present, the dry slag removal system is mostly used for the treatment of pulverized coal furnace bottom slag. By setting a dry slag discharger between the slag pit and the slag bin, the entire bottom slag treatment process such as collection-pre-crushing-transportation and cooling-crushing-storage-regular discharge is realized. Among them, the hydraulic shut-off door set between the slag pit and the dry slag discharger has the functions of shutting off the door and preventing large slag blocks from directly impacting the slag discharger and crushing large slag blocks. The hydraulic shut-off door (also known as the furnace bottom slag discharge device) is hydraulically driven and uses an extrusion head with a double-door plate structure driven by an oil cylinder. When large slag blocks are accumulated on the grille, the extrusion head can be started to extrude and crush the large slag blocks to less than 200mm, which is conducive to improving the cooling effect of the slag and is conducive to the crushing of the subsequent slag crusher; when the door panel is closed, it is equivalent to the function of the hydraulic shut-off door in the closed state. However, when using the above-mentioned hydraulic shut-off door, due to the difference in fuel quality, some fuel sintered slag blocks are too large, and there will be a problem that the extrusion head cannot be crushed in time, resulting in the accumulation of slag at the bottom of the slag pit. Summary of the invention

[0003] The purpose of the present invention is to provide a hydraulic crushing shut-off door, aiming to solve the technical problem in the above-mentioned prior art that oversized slag blocks cannot be crushed by an extrusion head, resulting in slag accumulation at the bottom of the slag pit.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A hydraulic crushing shut-off door comprises a mounting frame arranged at the bottom of a slag pit, two parallel side frames of the mounting frame are provided with a pair of extrusion assemblies capable of relative reciprocating motion, the extrusion assembly comprises an extrusion head, a box body and a push hydraulic cylinder, the box body is connected to the piston rod of the push hydraulic cylinder, the push hydraulic cylinder is arranged outside the mounting frame, the extrusion head is connected to the box body and both are arranged inside the mounting frame, and telescopic crushing mechanisms are provided on the opposite surfaces of the extrusion heads on both sides.

[0006] Preferably, the telescopic crushing mechanism includes a pick, a hammer and a cylinder; the hammer is arranged at the tail end of the pick, the middle part of the pick is connected to the cylinder through a spring, and the hammer is slidably matched with the inner wall of the cylinder; the cylinder is embedded in the interior of the extrusion head, and the end of the pick extends to the outside of the extrusion head; the cylinder is connected to an air intake assembly for driving the pick to move forward and backward.

[0007] Preferably, the end faces of the two extrusion heads are in the shape of teeth meshing with each other, and the pick is arranged at the top of the teeth.

[0008] Preferably, a drill hole is provided at the bottom of the tooth root groove on the tooth-shaped end face of the extrusion head, and the drill hole matches the pick drill on the opposite extrusion head.

[0009] Preferably, the telescopic crushing mechanism is in multiple groups, which are staggeredly arranged relative to the picks on the extrusion head. The cylinders of the telescopic crushing mechanism are divided into two groups and arranged in parallel in boxes on both sides, and the cylinders are connected to the air intake assembly.

[0010] Preferably, the air intake assembly includes an air intake pipe, an air distribution valve and an air distribution valve box. The air distribution valve box is arranged in the rear part of the box body, and multiple cylinders on the same side are connected to the air distribution valve box through air ducts.

[0011] Preferably, a telescopic component for driving the cylinder is provided at the rear of the box body, a movable end of the telescopic component is connected to the gas distribution valve box, and an inner cavity for the gas distribution valve box to move is provided at the rear of the box body.

[0012] Preferably, the telescopic component is a telescopic hydraulic cylinder, and the piston rod of the telescopic hydraulic cylinder passes through the side frame of the mounting frame and is connected to the gas distribution valve box.

[0013] Preferably, a plurality of parallel guide rails are provided in the installation frame, and the boxes on both sides slide along the guide rails.

[0014] The beneficial effect of adopting the above technical scheme is that compared with the prior art, the present invention arranges a telescopic crushing mechanism on the opposite surfaces of the extrusion heads on both sides, so as to pre-impact and crush the large slag blocks that fall to the bottom of the slag pit, and then starts the hydraulic cylinder to drive the box and the extrusion heads on both sides to move relative to each other, and performs secondary extrusion and crushing on the slag blocks, thereby achieving the purpose of crushing over-large slag blocks and avoiding the accumulation of slag at the bottom of the slag pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] Figure 1 It is a structural schematic diagram of a hydraulic breaker shutoff door provided by an embodiment of the present invention;

[0017] Figure 2 2 is a schematic structural diagram of a telescopic crushing mechanism in an embodiment of the present invention;

[0018] In the figure: 1-installation frame, 2-extrusion head, 3-box, 4-pushing hydraulic cylinder, 5-pick, 6-hammer, 7-cylinder, 8-spring, 9-gas distribution valve, 10-gas distribution valve box, 11-inner cavity, 12-telescopic component, 13-guide rail, 14-air inlet pipe. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1 The hydraulic crushing shut-off door provided by the present invention is now described. The hydraulic crushing shut-off door comprises a mounting frame 1 arranged at the bottom of the slag pit, and a pair of extrusion assemblies capable of relatively reciprocating motion are arranged on two parallel side frames of the mounting frame 1, and the extrusion assembly comprises an extrusion head 2, a box body 3 and a push hydraulic cylinder 4, the box body 3 is connected to the piston rod of the push hydraulic cylinder 4, the push hydraulic cylinder 4 is arranged outside the mounting frame 1, the extrusion head 2 is connected to the box body 3, and both are arranged inside the mounting frame 1, and telescopic crushing mechanisms are arranged on the opposite surfaces of the extrusion heads 2 on both sides.

[0021] The hydraulic crushing shut-off door provided by the present invention has the advantages of compact structure and good large slag block crushing effect compared with the prior art. By arranging a telescopic crushing mechanism on the opposite surfaces of the extrusion heads on both sides, the large slag blocks that fall to the bottom of the slag pit are pre-impacted and crushed, and then the hydraulic cylinder is started to drive the box bodies and the extrusion heads on both sides to move relative to each other, and the slag blocks are subjected to secondary extrusion and crushing, thereby achieving the purpose of crushing over-large slag blocks and avoiding the accumulation of slag at the bottom of the slag pit that affects the crushing of the slag crusher.

[0022] Further, see Figure 1 , 2 As a specific embodiment of the hydraulic crushing shut-off door provided by the present invention, the telescopic crushing mechanism includes a pick 5, a hammer 6 and a cylinder 7; the hammer 6 is arranged at the tail end of the pick 5, the middle part of the pick 5 is connected to the cylinder 7 through a spring 8, and the hammer 6 is slidably matched with the inner wall of the cylinder 7; the cylinder 7 is embedded in the interior of the extrusion head 2, and the end of the pick 5 extends to the outside of the extrusion head 2; the cylinder 7 is connected to an air intake assembly for driving the pick 5 to move forward and backward. The air intake assembly is connected to the air source, and the hammer moves back and forth in the cylinder under the drive of the air intake assembly, thereby destroying large slag blocks. After the large slag blocks are pre-crushed, the extrusion heads on both sides further move relative to each other, which is convenient for secondary extrusion and crushing of the large slag blocks, ensuring that the large slag blocks are crushed into pieces that meet the requirements.

[0023] Further, see Figure 1 As a specific embodiment of the hydraulic crushing shut-off door provided by the present invention, the end faces of the two extrusion heads 2 are meshed teeth. The pickaxe is installed on the tooth top of the extrusion head to facilitate the pickaxe to contact the large slag block in advance, so that the large slag block can be pre-punched and crushed.

[0024] To further optimize the above technical solution, a drill hole 15 is provided at the bottom of the tooth root groove on the tooth-shaped end face of the extrusion head 2, and the drill hole 15 matches the pick 5 on the opposite extrusion head 2. When the two extrusion heads make relative movements for extruding large slag blocks, after the staggered picks on both sides pre-crush the large slag blocks, the crushed slag blocks continue to be extruded, and when the picks are staggered and close to the corresponding tooth roots, the picks can be inserted into the drill hole to avoid damage to the picks.

[0025] Further, see Figure 1 As a specific embodiment of the hydraulic crushing shut-off door provided by the present invention, the telescopic crushing mechanism is composed of multiple groups, the picks 5 are arranged on the top of the teeth, and are staggered relative to the picks 5 on the extrusion head 2; the cylinders 7 of the telescopic crushing mechanism are arranged in parallel in the boxes 3 on both sides in two groups, and the cylinders 7 are connected to the air intake assembly. The large slag blocks are pre-crushed by using the multiple staggered picks on the relative extrusion head, and then the push hydraulic cylinder is driven to crush the large slag blocks for the second time by using the extrusion head, so as to achieve the purpose of extruding and crushing the slag blocks to less than 200mm.

[0026] Further, see Figure 1 As a specific embodiment of the hydraulic crushing shut-off door provided by the present invention, the air intake assembly includes an air intake pipe 14, an air distribution valve 9 and an air distribution valve box 10. The air distribution valve box 10 is arranged in the rear part of the box body 3, and multiple cylinder bodies 7 on the same side are connected to the air distribution valve box 10 through air passages. The conventional design of the pneumatic pick is adopted, and multiple longitudinal air holes are arranged on the side walls around the cylinder body. There is a plunger valve between the air intake pipe and the air distribution valve to control the air path. The plunger valve is in a normally closed state of cutting off the air path under the action of the spiral spring; the air path is connected by compressing the spring of the plunger valve. One end of these air holes is connected to the air distribution valve, and the other end is connected to the cylinder body. The box body is used to push the cylinder body. The length of each air hole is configured according to the movement requirements of the impact hammer so as to take in or exhaust air in turn. The plunger valve is in a normally closed state of cutting off the air path under the action of the spiral spring. Make the impact hammer body reciprocate regularly in the cylinder body. When crushing large slag blocks, the pickaxe is used to support the large slag blocks, and the other end of the pickaxe is passed into the cylinder body. Under the pushing action of the box body, the spring of the plunger valve is compressed to connect the air path. There are many longitudinal air holes around the side wall of the cylinder body, and the air distribution valve automatically distributes air. The rear end of the cylinder body is equipped with an air distribution valve box. To further optimize the above technical solution, such as Figure 1As shown, the rear of the box body 3 is provided with a telescopic component 12 for driving the cylinder body 7, the movable end of the telescopic component 12 is connected to the gas distribution valve box 10, and the rear of the box body 3 is provided with an inner cavity 11 for the gas distribution valve box 10 to move. Among them, the telescopic component 12 is a telescopic hydraulic cylinder, and the piston rod of the telescopic hydraulic cylinder penetrates the side frame of the mounting frame 1 and is connected to the gas distribution valve box 10. The telescopic hydraulic cylinder can be used to drive the pick to extend and retract at the tooth top of the extrusion head. After the large slag block is pre-crushed, the telescopic hydraulic cylinder can be started to retract the pick, and then the extrusion head is used to perform secondary crushing of the slag block under the action of the push hydraulic cylinder, which is beneficial to protect the pick.

[0027] Further, see Figure 1 As a specific embodiment of the hydraulic crushing shut-off door provided by the present invention, a plurality of parallel guide rails 13 are arranged in the installation frame 1, and the boxes 3 on both sides slide along the guide rails 13. This structure can ensure that the boxes and the extrusion head run smoothly.

[0028] In the above description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed above.

Claims

1. A hydraulic breaking shut-off door, characterized in that: It comprises a mounting frame arranged at the bottom of the slag pit, a pair of extrusion assemblies capable of relatively reciprocating motion are arranged on two parallel side frames of the mounting frame, the extrusion assembly comprises an extrusion head, a box body and a push hydraulic cylinder, the box body is connected to the piston rod of the push hydraulic cylinder, the push hydraulic cylinder is arranged outside the mounting frame, the extrusion head is connected to the box body and both are arranged inside the mounting frame, and telescopic crushing mechanisms are arranged on opposite surfaces of the extrusion heads on both sides; The telescopic crushing mechanism comprises a pick, a hammer and a cylinder; the hammer is arranged at the tail end of the pick, the middle part of the pick is connected to the cylinder through a spring, and the hammer is slidably matched with the inner wall of the cylinder; the cylinder is embedded in the interior of the extrusion head, and the end of the pick extends to the outside of the extrusion head; the cylinder is connected to an air intake assembly for driving the pick to move forward and backward; the end faces of the two extrusion heads are mutually meshing teeth, and the pick is arranged at the top of the teeth; A drill hole is provided at the bottom of the tooth root groove on the tooth-shaped end face of the extrusion head, and the drill hole matches the pick on the opposite extrusion head; The telescopic crushing mechanism is composed of multiple groups, which are arranged in a staggered manner relative to the picks on the extrusion head. The cylinder bodies of the telescopic crushing mechanism are divided into two groups and arranged in parallel in the boxes on both sides. The cylinder bodies are all connected to the air intake components.

2. The hydraulic breaking shut-off door according to claim 1 is characterized in that: The air intake assembly includes an air intake pipe, an air distribution valve and an air distribution valve box. The air distribution valve box is arranged in the rear part of the box body, and multiple cylinders on the same side are connected to the air distribution valve box through air passages.

3. The hydraulic breaking shut-off door according to claim 2 is characterized in that: The rear part of the box body is provided with a telescopic component for driving the cylinder body, the movable end of the telescopic component is connected to the gas distribution valve box, and the rear part of the box body is provided with an inner cavity for the gas distribution valve box to move.

4. The hydraulic breaking shut-off door according to claim 3 is characterized in that: The telescopic component is a telescopic hydraulic cylinder, and a piston rod of the telescopic hydraulic cylinder penetrates through a side frame of the mounting frame and is connected to a gas distribution valve box.

5. The hydraulic breaking shut-off door according to any one of claims 1 to 4, characterized in that: A plurality of parallel guide rails are arranged in the installation frame, and the boxes on both sides slide along the guide rails.

Images