A double shaft mixer

Abstract

The utility model relates to the technical field of mixer, and disclose a double shaft mixer, including the base frame, the base frame is fixed with the stirring box, two rotating rods are rotatably connected in the stirring box, two stirring shafts are installed on two rotating rods, drive assembly is installed on the base frame, two support blocks are fixed on the back of stirring box, the fixed link is fixed between two support blocks, two L shape rotating blocks are rotatably connected on the fixed link, the end side of L shape rotating block is fixed with the apron, the locking assembly is installed on the stirring box. The utility model constructs double security protection mechanism through locking assembly, can avoid the equipment misoperation risk when the staff clears the wet ash, from the root, eliminates the personal injury accident, and the life safety of operating personnel is guaranteed, and the operation process is simple and convenient, and the daily use habit of operating personnel is matched, effectively reduces the operation time, and improves the operation efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of blender, concretely to a double-shaft blender. BACKGROUND

[0002] In the running process of the ash silo of the power plant, a large amount of wet ash with high water content will be generated. If the wet ash is directly transported, the wet ash is easy to solidify and harden in the ash conveying pipeline, resulting in pipeline blockage, and further causing the failure of the ash discharging system, affecting the overall ash discharging efficiency of the ash silo, and even possibly causing the shutdown of the equipment. The double-shaft blender can pre-stir the wet ash, break the wet ash agglomerates, and keep the wet ash in a loose state, ensuring the smooth progress of subsequent ash conveying operations, and therefore becomes an important equipment for ensuring the normal ash discharging of the ash silo of the power plant.

[0003] As an important equipment in the ash conveying system of the ash silo of the power plant, the running state of the double-shaft blender of the ash silo directly affects the normal development of the ash discharging operation of the ash silo. In order to avoid the long-term accumulation and solidification of the wet ash in the stirring box, and further cause the blockage and failure of the ash discharging system, maintenance personnel need to clean the residual wet ash in the stirring box body multiple times every day.

[0004] However, during the cleaning operation of the maintenance personnel opening the cover plate of the stirring box, if the personnel misoperate the equipment or the equipment control element suddenly fails, causing the stirring shaft to rotate unexpectedly, it is easy to cause personal injury accidents, and it is difficult to meet the safety protection requirements of the power plant for the ash cleaning operation personnel, threatening the life safety of the operation personnel and the safe production of the power plant.

[0005] Therefore, we propose a double-shaft blender to solve the problems mentioned above. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims to provide a double-shaft blender to solve the problem that the existing double-shaft blender lacks a safety locking structure, causing personnel misoperation of the equipment or sudden failure of the equipment control element, resulting in the stirring shaft rotating unexpectedly, which is easy to cause personal injury accidents, and it is difficult to meet the safety protection requirements of the power plant for the ash cleaning operation personnel, threatening the life safety of the operation personnel and the safe production of the power plant.

[0007] The utility model provides the following technical scheme: a double-shaft blender, comprising a base frame, a stirring box is fixed on the base frame, two rotating rods are rotatably connected in the stirring box, stirring shafts are installed on the two rotating rods, a driving assembly is installed on the base frame, two support blocks are symmetrically fixed on the back of the stirring box, a fixed rod is fixed between the two support blocks, two L-shaped rotating blocks are rotatably connected on the fixed rod, a cover plate is fixed on the end side of the L-shaped rotating block, and a locking assembly is installed on the stirring box.

[0008] Preferably, the stirring shafts are linearly distributed and arranged in a staggered manner.

[0009] Preferably, the driving assembly comprises a fixing plate fixed on the base frame, a motor fixed on the fixing plate, a transmission shaft fixed at the output end of the motor, a pulley one fixed on the outer ring of the transmission shaft, connecting rods fixed on both sides of the transmission shaft, a supporting block fixed on the base frame, the connecting rods being rotatably connected with the supporting block, a pulley two fixed on one side of the connecting rod, and a belt wound and connected between the pulley one and the pulley two.

[0010] Preferably, the driving assembly comprises a fixing plate fixed on the base frame, a motor fixed on the fixing plate, a transmission shaft fixed at the output end of the motor, a pulley one fixed on the outer ring of the transmission shaft, connecting rods fixed on both sides of the transmission shaft, a supporting block fixed on the base frame, the connecting rods being rotatably connected with the supporting block, a pulley two fixed on one side of the connecting rod, and a belt wound and connected between the pulley one and the pulley two.

[0011] Preferably, the locking assembly comprises a lock box fixed on the side wall of the stirring box, ear rings symmetrically fixed on both sides of the lock box, the ear rings being fixedly connected with the stirring box through bolts, a resisting rod slidably connected with the lock box, a baffle fixed on the outer ring of the resisting rod, springs elastically mounted between the baffle and the lock box, and the resisting rod being matched with an L-shaped rotating block.

[0012] Preferably, the lock box is provided with a cavity, the inner surface of the lock box is provided with a sliding groove, the sliding groove is communicated with the cavity, a sliding block is slidably connected in the sliding groove, a compression spring is fixed on the end side of the sliding block, the other end of the compression spring is fixedly connected with the inner wall of the cavity, an L-shaped inclined block is fixed on the sliding block, a movable contact is fixed on one end of the L-shaped inclined block, a stationary contact is fixed on the inner wall of the cavity, and the movable contact and the stationary contact are coaxially arranged.

[0013] Preferably, the lock box is provided with a cavity, the inner surface of the lock box is provided with a sliding groove, the sliding groove is communicated with the cavity, a sliding block is slidably connected in the sliding groove, a compression spring is fixed on the end side of the sliding block, the other end of the compression spring is fixedly connected with the inner wall of the cavity, an L-shaped inclined block is fixed on the sliding block, a movable contact is fixed on one end of the L-shaped inclined block, a stationary contact is fixed on the inner wall of the cavity, and the movable contact and the stationary contact are coaxially arranged.

[0014] Preferably, the lock box is provided with a cavity, the inner surface of the lock box is provided with a sliding groove, the sliding groove is communicated with the cavity, a sliding block is slidably connected in the sliding groove, a compression spring is fixed on the end side of the sliding block, the other end of the compression spring is fixedly connected with the inner wall of the cavity, an L-shaped inclined block is fixed on the sliding block, a movable contact is fixed on one end of the L-shaped inclined block, a stationary contact is fixed on

[0015] The utility model has the following beneficial effects: 1、The mixer builds double safety protection mechanism through the locking assembly, can avoid the risk of equipment misoperation when the staff cleans wet ash, eliminates the personal injury accident from the source, and effectively protects the life safety of the operating personnel; in daily operation, only through the button can realize the linkage control of cover opening and closing and equipment start-stop, the operation process is simple and convenient, which meets the daily use habit of the operating personnel, effectively reduces the operation time and improves the operation efficiency; more importantly, even if the button fails, the electric push column fails and other unexpected conditions, the cover opening process can still actively disconnect the equipment control circuit through mechanical forced locking, ensure that the safety protection function does not fail, greatly improve the safety and reliability of the equipment under complex working conditions, fully meet the safety protection requirements of the power plant for ash cleaning operation, and build a strong defense line for the safe production of the power plant.

[0016] 2、The locking assembly in the mixer adopts bolt fixing, which is convenient to disassemble and maintain when the late lock box fails, reduces the equipment maintenance difficulty and maintenance time cost.

[0017] 3、The mixer can effectively break the wet ash solidification in the mixing box, keep the wet ash in a loose state, avoid the failure of the ash discharge system caused by wet ash solidification, and ensure the normal operation of the ash storage discharge operation; the staggered distribution of the stirring shaft cooperates with the double shaft reverse rotation, which can more fully stir the wet ash, reduce the stirring dead angle, improve the wet ash stirring efficiency, and provide convenience for subsequent ash conveying operation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The overall structure of the utility model Figure 1 .

[0019] Figure 2 The overall structure of the utility model Figure 2 .

[0020] Figure 3 The overall structure of the utility model Figure 3 .

[0021] Figure 4 The locking assembly structure of the utility model.

[0022] Figure 5 The utility model Figure 4 Cross-sectional view.

[0023] In the figure: 1, base frame; 2, stirring box; 3, rotating rod; 4, stirring shaft; 5, driving assembly; 51, fixed plate; 52, motor; 53, transmission shaft; 54, pulley one; 55, belt; 56, pulley two; 57, support block; 58, connecting rod; 59, gear; 6, support block; 7, fixed rod; 8, L-shaped rotating block; 9, cover plate; 10, locking assembly; 101, lock box; 102, lug; 103, cavity; 104, abutting rod; 105, fence; 106, spring; 107, sliding groove; 108, sliding block; 109, compression spring; 110, L-shaped inclined block; 111, movable contact; 112, stationary contact; 113, support; 114, electric push column; 115, electromagnet; 116, permanent magnet; 117, button. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] Embodiment one: This embodiment aims to promote the solution to the problem that wet ash is prone to solidify and harden in the stirring box 2 during the ash conveying process of the ash silo, resulting in failure of the ash discharging system and affecting the normal ash discharging of the ash silo. Please refer to Figure 1 Figure 3 A double-shaft stirrer, comprising a base frame 1, a stirring box 2 is fixed on the base frame 1, the stirring box 2 is fixed with the base frame 1 by welding, the inside of the box body is made of wear-resistant and corrosion-resistant material, which can reduce the damage of long-term erosion of wet ash to the box body and prolong the service life of the equipment. At the same time, the box body is provided with a feed inlet at the top, which facilitates the introduction of wet ash, and a discharge outlet at the bottom connected with the ash conveying pipeline, which ensures the smooth conveying of loose ash after stirring. Since the feed inlet and the discharge outlet are prior art, they will not be described in detail.

[0026] ​Two rotating rods 3 are rotatably connected in the stirring box 2, the two rotating rods 3 are provided with stirring shafts 4, the stirring shafts 4 are linearly distributed and arranged in a staggered manner, a driving assembly 5 is arranged on the base frame 1, the driving assembly 5 comprises a fixed plate 51 fixed on the base frame 1, a motor 52 fixed on the fixed plate 51, a transmission shaft 53 fixed on the output end of the motor 52, a pulley one 54 fixedly sleeved on the outer ring of the transmission shaft 53, a connecting rod 58 fixed on the two sides of the rotating rod 3, a supporting block 57 fixed on the base frame 1, the connecting rod 58 is rotatably connected with the supporting block 57, a pulley two 56 is fixedly sleeved on one side of the connecting rod 58, a belt 55 is wound and connected between the pulley one 54 and the pulley two 56, and a gear 59 is fixed on the other side of the connecting rod 58. The two gears 59 are meshed with each other.

[0027] In this embodiment: first, the wet ash to be transported is introduced into the stirring box 2, then the motor 52 in the driving assembly 5 is started, the motor 52 drives the transmission shaft 53 at the output end to rotate after being powered on, the pulley one 54 fixed on the outer ring of the transmission shaft 53 rotates synchronously with the transmission shaft 53, since the pulley one 54 and the pulley two 56 on one side of the connecting rod 58 are connected through the belt 55, the rotation of the pulley one 54 will drive the pulley two 56 to rotate through the belt 55, and then the connecting rod 58 on this side and the rotating rod 3 fixed with the connecting rod 58 start to rotate.

[0028] At the same time, the connecting rod 58 of the other rotating rod 3 is fixed with a gear 59, and the gears 59 corresponding to the two rotating rods 3 are meshed with each other, when the one side rotating rod 3 rotates, the other side rotating rod 3 will be driven to rotate in the opposite direction through the meshing of the gears 59. In the process of synchronous reverse rotation of the two rotating rods 3, the multiple stirring shafts 4 linearly distributed and arranged in a staggered manner on the surface will rotate, the staggered stirring shafts 4 can fully stir the wet ash in the stirring box 2, break the possible clumps of the wet ash, and keep the wet ash in a loose state, so as to facilitate the subsequent ash conveying operation, avoid the failure of the ash conveying system caused by the solidification of the wet ash, and ensure the normal ash conveying of the ash silo.

[0029] Embodiment two: This embodiment aims to promote the solution to the problem that the staff is injured by the misoperation of the equipment when cleaning the wet ash in the double-shaft stirring box, and this embodiment is an improvement on the basis of embodiment one, for details, please refer to Figure 1 and Figure 4 - Figure 5The back of the stirring box 2 is symmetrically fixed with two supporting blocks 6, the two supporting blocks 6 are fixed with a fixed rod 7, the fixed rod 7 is rotationally connected with two L-shaped rotating blocks 8, the two L-shaped rotating blocks 8 are fixed on the two side edges of a cover plate 9, the cover plate 9 can be opened upward around the fixed rod 7, the opening angle can reach 90 degrees at most, the staff can conveniently stretch into the tool to clean the residual wet ash in the box, and a handle can be additionally arranged on the outer side of the cover plate 9, so that the operation is facilitated. The L-shaped rotating block 8 is fixed with the cover plate 9, the cover plate 9 is made of light and high-strength plate material, the area is matched with the top opening of the stirring box 2, so that the opening can be completely covered when being closed, the ash material is prevented from splashing, and the stirring box 2 is provided with a locking assembly 10.

[0030] The locking assembly 10 comprises a lock box 101 fixed on the side wall of the stirring box 2, two hanging ears 102 symmetrically fixed on the two sides of the lock box 101, the hanging ears 102 are fixedly connected with the stirring box 2 through bolts, so that the lock box 101 can be conveniently disassembled and maintained when a fault occurs in the later stage, a contact rod 104 is slidably connected to the lock box 101, a baffle 105 is fixedly sleeved on the outer circle of the contact rod 104, springs 106 are elastically arranged between the baffle 105 and the lock box 101, and the contact rod 104 is in contact with the L-shaped rotating block 8.

[0031] A cavity 103 is formed in the lock box 101, a sliding groove 107 is formed in the inner surface of the lock box 101 and communicates with the cavity 103, a sliding block 108 is slidably connected in the sliding groove 107, a compression spring 109 is fixed to one end of the sliding block 108, the other end of the compression spring 109 is fixedly connected with the inner wall of the cavity 103, an L-shaped inclined block 110 is fixed to the sliding block 108, and the contact surface between the bottom of the contact rod 104 and the L-shaped inclined block 110 is provided as an inclined surface. The inclined angle of the inclined surface is optimized and designed, so that the vertical pressure can be stably converted into horizontal thrust for sliding the L-shaped inclined block 110 when the contact rod 104 moves downward.

[0032] One end of the L-shaped inclined block 110 is fixed with a moving contact 111, the inner wall of the cavity 103 is fixed with a stationary contact 112, and the moving contact 111 and the stationary contact 112 are coaxially arranged. The moving contact 111 and the stationary contact 112 are made of silver alloy material and have good conductivity, so that the control circuit can be ensured to be smooth when the two are in contact, and the circuit can be reliably disconnected when the two are separated.

[0033] The side wall of the lock box 101 is fixed with a support 113, the support 113 is fixed with an electric push column 114, the output end of the electric push column 114 is fixed with an electromagnet 115, the other side of the L-shaped inclined block 110 is fixed with a permanent magnet 116, and the electromagnet 115 and the permanent magnet 116 are coaxially arranged.

[0034] The surface of the lock box 101 is provided with a button 117, and the button 117 is electrically connected with the electric push column 114.

[0035] In the embodiment, the locking structure is mainly used to ensure the safety of the workers when they clean the wet ash in the mixing box 2, and avoid the personal injury caused by the misoperation of the stirring shaft 4. Specifically, during the daily ash conveying operation, the electromagnet 115 is not powered in the initial state, and no attractive force is generated between the electromagnet 115 and the permanent magnet 116. When the stirring operation needs to be started, the cover plate 9 of the mixing box 2 is in a closed state. At this time, the worker presses the button 117 on the surface of the lock box 101. The button 117 controls the electromagnet 115 to be powered. The electromagnet 115 generates a magnetic attraction between the electromagnet 115 and the permanent magnet 116 on the L-shaped inclined block 110, so that the electromagnet 115 and the L-shaped inclined block 110 form a fixed whole. Then, the electric push column 114 pushes the fixed whole to move, so that the movable contact 111 on the L-shaped inclined block 110 is in contact with the static contact 112 on the inner wall of the cavity 103. At this time, the control circuit of the stirring device is powered on. Then, the electromagnet 115 is powered off, and the electric push column 114 remains at the current position and is not recycled, so as to ensure that the movable contact 111 and the static contact 112 always remain in contact during the operation of the device, and then ensure that the driving motor 52 can be stably started, so as to realize the stirring and ash conveying operation in the first embodiment. When the worker needs to clean the wet ash in the mixing box 2, the stirring device needs to be turned off first. At this time, the button 117 is pressed, and the button 117 controls the electromagnet 115 to be powered again. The electromagnet 115 and the permanent magnet 116 are attracted to each other, and at the same time, the electric push column 114 is recycled to drive the L-shaped inclined block 110 to move, so that the movable contact 111 and the static contact 112 are separated, and the control circuit is disconnected. However, during this process, the button 117 switch may fail or other faults may occur, so that the electric push column 114 cannot be normally recycled, and the movable contact 111 and the static contact 112 cannot be separated. If the worker directly cleans it, there is still a risk of misoperation of the stirring shaft 4. Therefore, another locking method needs to be used to achieve safety protection. When the staff opens the cover plate 9, the cover plate 9 rotates around the fixed rod 7 between the two supporting blocks 6, and the L-shaped rotating block 8 fixedly connected with the cover plate 9 rotates synchronously, and in the rotating process, the L-shaped rotating block 8 contacts the abutting rod 104 on the lock box 101, and as the cover plate 9 continues to open, the L-shaped rotating block 8 extrudes the abutting rod 104, so that the abutting rod 104 moves downward to the inside of the lock box 101, and in the downward movement process, the abutting rod 104 extrudes the spring 106 outside the abutting rod 104, and since the contact surface between the abutting rod 104 and the L-shaped inclined block 110 is arranged in an inclined surface, the abutting rod 104 generates a lateral thrust on the L-shaped inclined block 110 when moving downward, so as to promote the L-shaped inclined block 110 to slide along the sliding groove 107, and then drive the moving contact 111 to separate from the stationary contact 112, so that the starting control loop of the stirring device is disconnected, and the closing loop is locked, and at this time, even if the driving assembly 5 tries to start, the stirring shaft 4 cannot rotate. And in the whole process of cleaning the wet ash by the staff, the cover plate 9 is always in an open state, the L-shaped rotating block 8 continuously presses on the abutting rod 104, so that the abutting rod 104 remains in a downward moving state, and the L-shaped inclined block 110 also maintains at a position where the moving contact 111 is separated from the stationary contact 112, so as to form a continuous locking state, and completely avoid personal injury caused by misstarting of the stirring shaft 4 during the cleaning process.

[0036] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0037] The preferred embodiments of the present application have been described above with the preferred embodiments; it should be noted that, for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A twin-shaft mixer, comprising a base frame (1), characterized in that: A mixing tank (2) is fixed on the base frame (1). Two rotating rods (3) are rotatably connected inside the mixing tank (2). A stirring shaft (4) is installed on each of the two rotating rods (3). A drive assembly (5) is installed on the base frame (1). Two support blocks (6) are symmetrically fixed on the back of the mixing tank (2). A fixing rod (7) is fixed between the two support blocks (6). Two L-shaped rotating blocks (8) are rotatably connected on the fixing rod (7). A cover plate (9) is fixed on the end side of the L-shaped rotating blocks (8). A locking assembly (10) is installed on the mixing tank (2).

2. The twin-shaft mixer according to claim 1, characterized in that: The stirring shafts (4) are arranged in a linear distribution, and the stirring shafts (4) are arranged in an alternating manner.

3. A twin-shaft mixer according to claim 1, characterized in that: The drive assembly (5) includes a fixed plate (51) fixed on the base frame (1), a motor (52) fixed on the fixed plate (51), a drive shaft (53) fixed at the output end of the motor (52), a pulley (54) fixedly sleeved on the outer ring of the drive shaft (53), connecting rods (58) fixed on both sides of the rotating rod (3), a support block (57) fixed on the base frame (1), the connecting rod (58) rotatably connected to the support block (57), a pulley (56) fixedly sleeved on one side of the connecting rod (58), and a belt (55) wound between the pulley (54) and the pulley (56).

4. A twin-shaft mixer according to claim 3, characterized in that: On the other side, a gear (59) is fixed on the connecting rod (58). There are two gears (59), and the two gears (59) mesh with each other.

5. A twin-shaft mixer according to claim 1, characterized in that: The locking assembly (10) includes a lock box (101) fixed to the side wall of the mixing tank (2). The lock box (101) has symmetrically fixed lugs (102) on both sides. The lugs (102) are fixed to the mixing tank (2) by bolts. The lock box (101) has a sliding contact rod (104). The outer ring of the contact rod (104) is fixedly sleeved with a surrounding plate (105). A spring (106) is elastically installed between the surrounding plate (105) and the lock box (101). The contact rod (104) is in contact with the L-shaped rotating block (8).

6. A twin-shaft mixer according to claim 5, characterized in that: The lock box (101) has a cavity (103) inside. The inner surface of the lock box (101) has a sliding groove (107) connected to the cavity (103). A slider (108) is slidably connected in the sliding groove (107). A compression spring (109) is fixed on one end of the slider (108). The other end of the compression spring (109) is fixedly connected to the inner wall of the cavity (103). An L-shaped inclined block (110) is fixed on the slider (108). A moving contact (111) is fixed on one end of the L-shaped inclined block (110). A stationary contact (112) is fixed on the inner wall of the cavity (103). The moving contact (111) and the stationary contact (112) are coaxially arranged.

7. A twin-shaft mixer according to claim 6, characterized in that: A bracket (113) is fixed to the side wall of the lock box (101), an electric push column (114) is fixed on the bracket (113), an electromagnet (115) is fixed to the output end of the electric push column (114), and a permanent magnet (116) is fixed to the other side of the L-shaped inclined block (110). The electromagnet (115) and the permanent magnet (116) are coaxially arranged.

8. A twin-shaft mixer according to claim 7, characterized in that: A button (117) is installed on the surface of the lock box (101), and the button (117) is electrically connected to the electric push column (114).

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