Powder feeding device for boiler pulverizing system

Abstract

The invention provides a pulverized coal feeding device for a boiler pulverizing system, which comprises a storage tank, a blanking mechanism I, a support frame, a guide rail, a feeding assembly and a pulverized coal feeding pipe assembly, and is characterized in that the pulverized coal feeding pipe assembly is arranged, a gate plate assembly is arranged in the middle of a pipe body of the pulverized coal feeding pipe assembly, pulverized coal is poured into the pipe body, and the falling pulverized coal is blocked by an upper gate plate; according to the boiler, pulverized coal is prevented from being ignited by high temperature in the boiler, then the upper gate plate is opened to enable the pulverized coal to fall onto the lower gate plate, the upper gate plate is closed, the pulverized coal can fall into the boiler by opening the lower gate plate, and potential safety hazards caused by high temperature of the feeding assembly due to ignition of the pulverized coal in the process that the pulverized coal falls into the boiler are avoided; a limiting rod of the flashboard limiting mechanism is used for limiting movement of the upper flashboard and the lower flashboard, so that the upper flashboard and the lower flashboard cannot be opened at the same time, and high temperature in the boiler is prevented from being conducted to the feeding assembly and pulverized coal in the feeding assembly.

Description

Technical Field

[0001] The invention relates to the field related to boiler pulverizing system, in particular to a powder feeding device for a boiler pulverizing system. Background Art

[0002] The boiler pulverizing system is a combination of equipment and connecting pipes that grinds raw coal into pulverized coal and then feeds the pulverized coal into the boiler furnace for suspended combustion. Compared with traditional lump coal, it burns more fully, which not only improves the utilization rate of coal resources but also solves the problem of harmful gases produced by incomplete combustion of lump coal.

[0003] At present, the publication number CN113266841B discloses "A Powder Delivery Device for a Boiler Pulverizing System", which includes a base, the upper end of which is fixedly connected to two support plates, a powder storage tank fixedly connected to the upper ends of the two support plates, and both upper and lower ends of the powder delivery tank are openings. A first switch mechanism is connected to the powder delivery tank to open and close the opening at its upper end to receive coal powder, and a second switch mechanism is connected to the powder delivery tank to open and close the opening at its lower end to dump coal powder. The powder delivery operation is completed intelligently by a mechanical device, without the need to rely on manpower to carry coal powder, and the two switch mechanisms provided during the powder delivery process will automatically close or open the openings at the upper and lower ends of the powder delivery tank to allow coal powder to pass through or close them to store coal powder, which saves manpower and avoids the escape of coal powder caused by workers during the handling process.

[0004] Although the powder feeding device of the above-mentioned boiler pulverizing system effectively solves the problem of coal powder leakage, the above-mentioned powder feeding device has certain safety hazards. When the coal powder is poured into the boiler, due to the high temperature inside the boiler and the extremely flammable coal, the coal powder will burn during the process of being poured into the boiler, causing high temperature inside the powder feeding tank that transports the coal powder. When the coal powder is subsequently loaded into the powder feeding tank, it is easy to ignite the coal powder due to the high temperature inside the powder feeding tank. The powder feeding tank is connected with the powder storage tank during powder loading. The ignition of coal powder during the loading process can easily cause the coal powder inside the powder storage tank to ignite, thus causing serious harm. Summary of the invention

[0005] In order to solve the above technical problems, the object of the present invention is to provide a powder feeding device for a boiler powder making system.

[0006] Based on this, the present invention proposes a powder feeding device for a boiler powder making system, a powder feeding device for a boiler powder making system, comprising a storage tank, a blanking mechanism, a support frame, a guide rail, a feeding assembly and a powder feeding pipe assembly, the bottom end of the storage tank is installed with a blanking mechanism, the bottom edge of the storage tank is fixedly connected to the support frame, the feeding assembly moves along the guide rail, and the bottom end of the guide rail is fixedly connected to the support frame, the powder feeding pipe assembly is arranged on the left side of the bottom of the guide rail, the powder feeding pipe assembly comprises a tube body, a feed port and a gate assembly, the top of the tube body is provided with a feed port, the middle part of the left side of the tube body is installed with a gate assembly, and the bottom end of the tube body is connected with the boiler powder inlet;

[0007] The gate assembly includes an outer frame, a gate limiting mechanism, a lower gate, an upper gate and an electric push rod. A gate limiting mechanism is arranged in the middle of the inner right end of the outer frame. The upper gate and the lower gate are arranged on the upper and lower sides of the inner part of the outer frame respectively. The right ends of the upper and lower gates extend into the tube body. The upper and lower ends of the left end of the outer frame are respectively installed with an electric push rod, and the two electric push rods are respectively connected to the upper gate and the lower gate. The gate limiting mechanism is used to limit the movement of the upper gate and the lower gate. The outer frame is fixed to the outside of the tube body.

[0008] Preferably, the gate limiting mechanism includes a shell, a limiting rod, a limiting tube, a connecting shaft, a connecting rod, a main gear, a driving gear 1, a driving gear 2, a shift rod 1, a shift rod 2, a movable shaft, an arc groove, a fixed rod and a tension spring. The inner right side of the shell is penetrated by the limiting rod, and the upper and lower sides of the outer side of the limiting rod are both covered with limiting tubes, and the limiting tubes are fixedly connected to the shell. The front middle part of the limiting rod is connected to the connecting rod through the connecting shaft, and the left end of the connecting rod is connected to the main gear through the transmission shaft. The bottom of the main gear is meshed with the driving gear 1, and the top of the main gear is meshed with the driving gear 2. The top of the connecting rod is connected to the center of the driving gear one through the transmission shaft, and the bottom end of the shift rod one extends out of the shell, the bottom end of the shift rod two is connected to the center of the driving gear two through the transmission shaft, and the top end of the shift rod two extends out of the top of the shell, the middle part of the front end of the connecting rod is connected with a movable shaft, the front end surface of the shell is provided with an arc groove, the front end of the movable shaft passes through the arc groove, and the movable shaft slides along the inner wall of the arc groove, a fixed rod is fixed to the middle part of the left end of the shell, and the movable shaft is elastically connected to the fixed rod through a tension spring, the rear side of the shell is fixedly connected to the outer frame, and the limiting rod is used to limit the movement of the lower gate plate and the upper gate plate.

[0009] Preferably, the lower gate plate and the upper gate plate have the same structure and are symmetrically arranged. The lower gate plate includes a gate plate, a fixed block, a rotating shaft, a pawl, a torsion spring and a slot. A fixed block is fixed to the left side of the top end of the gate plate. The interior of the fixed block is rotatably connected to one end of the pawl through a rotating shaft. The pawl is elastically connected to the fixed block through a torsion spring. The top end of the pawl extends out of the fixed block. A slot is provided on the left side of the top end of the gate plate, and the slot is arranged on the right side of the fixed block. The left end of the gate plate is connected to an electric push rod, and the right end of the gate plate extends into the tube body.

[0010] Preferably, the middle portion of the tube body is inclined, and the inclination angle is less than forty-five degrees, and the gate assembly is vertically arranged to the middle portion of the tube body.

[0011] Preferably, a sliding groove is provided on the right side of the interior of the connecting rod, the sliding groove is arranged parallel to the connecting rod, and the connecting shaft slides along the inner wall of the sliding groove.

[0012] Preferably, both upper and lower ends of the limiting rod are in a cone shape, and the inner wall of the limiting tube is in contact with the limiting rod.

[0013] Preferably, the pawl of the lower gate plate is inclined upward from left to right, and the pawl of the upper gate plate is inclined downward from left to right, and the pawls of the lower gate plate and the upper gate plate are used to push the first lever and the second lever respectively.

[0014] Preferably, the feeding assembly includes a feeding frame, a gate valve, a roller, a driving motor and a blanking mechanism 2. A gate valve is installed on the top of the feeding frame, a roller and a driving motor are installed on the outer wall of the feeding frame, the driving motor is transmission-connected to the roller, and a blanking mechanism 2 is installed at the bottom end of the feeding frame, and the roller moves along the guide rail.

[0015] Preferably, the second blanking mechanism has the same structure as the first blanking mechanism, and comprises a blanking pipe, two gate valves, a support plate, a movable tube, a bonding plate and two electric push rods. The top of the blanking pipe is equipped with two gate valves, a support plate is fixed in the middle of the outer wall of the blanking pipe, the movable tube is sleeved on the bottom of the outer wall of the blanking pipe, a bonding plate is provided at the bottom of the outer wall of the blanking pipe, the top of the bonding plate is connected to the second electric push rod, and the top of the second electric push rod is fixedly connected to the support plate, the top of the blanking pipe of the second blanking mechanism is connected to the feeding frame, and the top of the blanking pipe of the first blanking mechanism is connected to the storage tank.

[0016] Preferably, a heat insulation board is provided in the middle of the gate plate, and the heat insulation effect of the gate plate is increased by the heat insulation board.

[0017] The present invention has the following advantages: The present invention provides a powder feeding device for a boiler powder making system through improvement, which has the following improvements compared with the same type of equipment:

[0018] Advantage 1: The present invention provides a powder feeding device for a boiler pulverizing system, which comprises a powder feeding pipe assembly, a gate assembly being arranged in the middle of the pipe body of the powder feeding pipe assembly, an upper gate and a lower gate being arranged on the upper and lower sides of the gate assembly, respectively, the upper gate and the lower gate being used to block the middle of the pipe body, the feeding assembly transports the coal powder to the top of the pipe body, and pours the coal powder into the pipe body, the falling coal powder is blocked by the upper gate to prevent the high temperature in the boiler from igniting the coal powder, and then the lower gate is closed, the upper gate is opened, the coal powder is allowed to fall onto the lower gate, the upper gate is closed, and the lower gate is opened to allow the coal powder to fall into the boiler, so as to prevent the coal powder from igniting in the process of falling into the boiler and causing high temperature to the feeding assembly and causing a safety hazard.

[0019] Advantage 2: The present invention provides a powder feeding device for a boiler powder making system, in which a gate limiting mechanism is provided, and a limiting rod of the gate limiting mechanism is used to limit the movement of an upper gate and a lower gate. When the upper gate is opened, the opening of the lower gate is restricted, and when the lower gate is opened, the opening of the upper gate is restricted, so that the upper gate and the lower gate cannot be opened at the same time, thereby preventing the high temperature in the boiler from being transmitted to the feeding assembly and the pulverized coal in the feeding assembly. The mechanical structure gate is used to limit the opening, and the limiting effect is good, which further reduces the risk of pulverized coal in the feeding assembly being ignited. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the powder delivery pipe assembly of the present invention;

[0022] Figure 3 It is a schematic diagram of the internal structure of the gate limiting mechanism of the present invention;

[0023] Figure 4 It is a schematic diagram of the tension spring structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the lower gate structure of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the feeding assembly of the present invention;

[0026] Figure 7 It is a structural schematic diagram of the second blanking mechanism of the present invention.

[0027] Explanation of the reference numerals: storage tank 1, material dropping mechanism 1-2, support frame 3, guide rail 4, material feeding assembly 5, powder feeding pipe assembly 6, boiler powder inlet 7, pipe body 61, material feeding port 62, gate assembly 63, outer frame 631, gate limiting mechanism 632, lower gate 633, upper gate 634, electric push rod 1-635, housing 6321, limiting rod 6322, limiting tube 6323, connecting shaft 6324, connecting rod 6325, slide 63251, main gear 6326, driving gear 1-6327, driving gear 2-6 328. lever one - 6329, lever two - 63210, movable shaft - 63211, arc groove - 63212, fixed rod - 63213, tension spring - 63214, gate - 6331, fixed block - 6332, rotating shaft - 6333, pawl - 6334, torsion spring - 6335, slot - 6336, feeding frame - 51, gate valve one - 52, roller - 53, driving motor - 54, blanking mechanism two - 55, blanking tube - 551, gate valve two - 552, support plate - 553, movable tube - 554, fitting plate - 555, electric push rod two - 556. DETAILED DESCRIPTION

[0028] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] Please refer to Figure 1-4 The present embodiment provides a powder feeding device for a boiler powder making system, comprising a storage tank 1, a material dropping mechanism 2, a support frame 3, a guide rail 4, a material feeding assembly 5 and a powder feeding pipe assembly 6. The material dropping mechanism 2 is installed at the bottom end of the storage tank 1. The bottom edge of the storage tank 1 is fixedly connected to the support frame 3. The material feeding assembly 5 moves along the guide rail 4, and the bottom end of the guide rail 4 is fixedly connected to the support frame 3. The powder feeding pipe assembly 6 is arranged on the left side of the bottom of the guide rail 4. The powder feeding pipe assembly 6 includes a pipe body 61, a feed port 62, and a feed port 63. and a gate assembly 63, a feed port 62 is provided at the top of the tube body 61, a gate assembly 63 is installed at the middle of the left side of the tube body 61, the bottom end of the tube body 61 is connected to the boiler powder inlet 7, the middle of the tube body 61 is inclined, and the inclination angle is less than 45 degrees, and the gate assembly 63 is vertically arranged with the middle of the tube body 61 to avoid the upper gate 634 and the lower gate 633 being arranged horizontally, resulting in the accumulation of coal powder on the gate, which makes it easy for the coal powder to enter the gap between the gate and the tube body 61;

[0033] The gate assembly 63 includes an outer frame 631, a gate limiting mechanism 632, a lower gate 633, an upper gate 634 and an electric push rod 1 635. The gate limiting mechanism 632 is arranged in the middle of the inner right end of the outer frame 631. The upper gate 634 and the lower gate 633 are arranged on the upper and lower sides of the inner part of the outer frame 631 respectively. The right ends of the upper gate 634 and the lower gate 633 extend into the tube body 61. The upper and lower ends of the left end of the outer frame 631 are respectively installed with an electric push rod 1 635, and the two electric push rods 1 635 are connected to the upper gate 634 and the lower gate 633 respectively. The gate limiting mechanism 632 is used to limit the movement of the upper gate 634 and the lower gate 633. The outer frame 631 is fixed to the outer side of the tube body 61.

[0034] The gate limiting mechanism 632 includes a housing 6321, a limiting rod 6322, a limiting tube 6323, a connecting shaft 6324, a connecting rod 6325, a main gear 6326, a driving gear 1 6327, a driving gear 2 6328, a lever 1 6329, a lever 2 63210, a movable shaft 63211, an arc groove 63212, a fixed rod 63213 and a tension spring 63214. The right side of the inner part of the housing 6321 is penetrated by the limiting rod 6322. The upper and lower sides of the outer part of the limiting rod 6322 are both covered with limiting tubes 6333, and the limiting tubes 6333 are fixedly connected to the housing 6321. The middle part of the front end of 6322 is connected to the connecting rod 6325 through the connecting shaft 6324, the left end of the connecting rod 6325 is connected to the main gear 6326 through the transmission shaft, the bottom of the main gear 6326 is meshed with the driving gear 1 6327, the top of the main gear 6326 is meshed with the driving gear 2 6328, the top of the lever 1 6329 is connected to the center of the driving gear 1 6327 through the transmission shaft, and the bottom end of the lever 1 6329 extends out of the housing 6321, the bottom end of the lever 2 63210 is connected to the center of the driving gear 2 6328 through the transmission shaft, and the lever 2 632 The top of 10 extends out of the top of the housing 6321, the middle of the front end of the connecting rod 6325 is connected with a movable shaft 63211, the front end surface of the housing 6321 is provided with an arc groove 63212, the front end of the movable shaft 63211 passes through the arc groove 63212, and the movable shaft 63211 slides along the inner wall of the arc groove 63212, a fixed rod 63213 is fixed to the middle of the left end of the housing 6321, and the movable shaft 63211 is elastically connected to the fixed rod 63213 through a tension spring 63214, the rear side of the housing 6321 is fixedly connected to the outer frame 631, and the limiting rod 6322 is used to adjust the lower gate plate 633 and the upper gate plate 634 is used to limit the movement of the connecting rod 6325. A slide groove 63251 is provided on the right side of the interior of the connecting rod 6325. The slide groove 63251 is arranged parallel to the connecting rod 6325, so that when the connecting rod 6325 rotates, the limiting rod 6322 is pushed to move by the connecting shaft 6324, and the connecting shaft 6324 slides along the inner wall of the slide groove 63251. The upper and lower ends of the limiting rod 6322 are both conical in shape, and the inner wall of the limiting tube 6323 is fitted with the limiting rod 6322. The moving trajectory of the limiting rod 6322 is limited by the limiting tube 6323, and the end of the limiting rod 6322 is arranged in a conical shape, which is convenient for inserting into the slot 6336.

[0035] Please refer to Figure 5, the lower gate plate 633 and the upper gate plate 634 have the same structure, and the lower gate plate 633 and the upper gate plate 634 are symmetrically arranged. The lower gate plate 633 includes a gate plate 6331, a fixed block 6332, a rotating shaft 6333, a pawl 6334, a torsion spring 6335 and a slot 6336. A fixed block 6332 is fixed to the left side of the top of the gate plate 6331. The interior of the fixed block 6332 is rotatably connected to one end of the pawl 6334 through the rotating shaft 6333. The pawl 6334 is elastically connected to the fixed block 6332 through the torsion spring 6335. The top of the pawl 6334 extends out of the fixed block 6332. A slot 6336 is provided on the left side of the top of the gate plate 6331, and the slot 6336 is arranged on the right side of the fixed block 6332. The left end of the gate plate 6331 is connected to the electric push rod 1 635, and the right end of the gate plate 6331 extends into the tube body 61;

[0036] The pawl 6334 of the lower gate plate 633 is inclined upward from left to right, and the pawl 6334 of the upper gate plate 634 is inclined downward from left to right. The pawls 6334 of the lower gate plate 633 and the upper gate plate 634 are respectively used to push the lever 1 6329 and the lever 2 63210. The torsion spring 6335 generates elastic potential energy for the pawl 6334, so that the pawl 6334 extends out of the fixed block 6332. When the pawl 6334 moves to the left and contacts the lever, the pawl 6334 squeezes the lever through the inclined surface on the left side, so that the pawl 6334 contracts. When the pawl 6334 moves to the right, it pushes the lever. A heat insulation plate is provided in the middle of the gate plate 6331 to increase the heat insulation effect of the gate plate 6331.

[0037] Please refer to Figure 1 , Figure 6 and Figure 7 The feeding assembly 5 includes a feeding frame 51, a gate valve 1 52, a roller 53, a driving motor 54 and a blanking mechanism 2 55. The gate valve 1 52 is installed on the top of the feeding frame 51, and the roller 53 and the driving motor 54 are installed on the outer wall of the feeding frame 51. The driving motor 54 is connected to the roller 53 by transmission. The blanking mechanism 2 55 is installed at the bottom of the feeding frame 51, and the roller 53 moves along the guide rail 4;

[0038] The structure of the blanking mechanism 2 55 is consistent with that of the blanking mechanism 1 2. The blanking mechanism 2 55 includes a blanking pipe 551, a gate valve 2 552, a support plate 553, a movable pipe 554, a bonding plate 555 and an electric push rod 2 556. The gate valve 2 552 is installed on the top of the blanking pipe 551, and a support plate 553 is fixed in the middle of the outer wall of the blanking pipe 551. The movable pipe 554 is sleeved on the bottom of the outer wall of the blanking pipe 551. The bottom of the outer wall of the blanking pipe 554 is provided with a bonding plate 555. The top of the bonding plate 555 is connected to the electric push rod 2 556, and the top of the electric push rod 2 556 is fixedly connected to the support plate 553. The top of the blanking pipe 551 of the blanking mechanism 2 55 is connected to the feeding frame 51, and the top of the blanking pipe 551 of the blanking mechanism 1 2 is connected to the storage tank 1.

[0039] The present invention provides a powder feeding device for a boiler powder making system through improvement, and its working principle is as follows;

[0040] First, when in use, the driving motor 54 of the feeding assembly 5 is controlled to drive the roller 53 to rotate, and the roller 53 moves along the guide rail 4, thereby controlling the movement of the feeding assembly 5, controlling the feeding assembly 5 to move to the bottom of the storage tank 1, and controlling the electric push rod 2 556 of the blanking mechanism 1 2 at the bottom of the storage tank 1 to extend, pushing the bonding plate 555 to move downward to fit with the feeding frame 51 of the feeding assembly 5, and the bonding plate 555 drives the movable pipe 554 to move downward along the outer wall of the blanking pipe 551, and then open the gate valve 1 52 at the top of the feeding frame 51, and open the gate valve 2 552 of the blanking mechanism 1 2, so that the coal powder inside the storage tank 1 falls into the feeding frame 51, and after the feeding frame 51 is loaded with powder, close the gate valve 1 52;

[0041] Second, the feeding assembly 5 is controlled to move to the top of the feed port 62 of the tube body 61, and the electric push rod 2 556 of the second drop mechanism 55 at the bottom of the feeding assembly 5 is controlled to extend, so that the fitting plate 555 at the bottom of the second drop mechanism 55 fits with the top edge of the discharge port 62. At this time, the upper gate 634 extends into the tube body 61, and the gate valve 2 552 of the second drop mechanism 55 at the bottom of the feeding assembly 5 is opened, so that the coal powder in the feeding frame 51 falls into the tube body 61 through the feed port 62 of the tube body 61, and the falling coal powder is blocked by the upper gate 634. To prevent the high temperature in the boiler from igniting the pulverized coal, the electric push rod 635 is controlled to drive the lower gate 633 to extend into the tube body 61, and the electric push rod 635 is controlled to drive the upper gate 634 to retract, and the upper gate 634 is opened to make the pulverized coal fall onto the lower gate 633, and then the upper gate 634 is closed, and the lower gate 633 is opened to make the pulverized coal fall into the boiler, so as to avoid the safety hazard of igniting the pulverized coal in the process of falling into the boiler and causing high temperature to the feeding assembly 5. After the pulverized coal falls into the boiler, the lower gate 633 is closed;

[0042] Third, by setting up the gate limiting mechanism 632, when the upper gate 634 moves to the right, the pawl 6334 of the upper gate 634 pushes the second lever 63210 to move to the right, and the second lever 63210 drives the second driving gear 6328 to rotate clockwise, and the second driving gear 6328 drives the main gear 6326 to rotate counterclockwise, and the main gear 6326 drives the driving gear 1 6327 to rotate clockwise, and the main gear 6326 drives the connecting rod 6325 to rotate counterclockwise. When the connecting rod 6325 rotates counterclockwise, it pushes the limiting rod 6322 to move upward through the connecting shaft 6324, so that the limiting rod 6322 is inserted upward into the slot 6336 of the upper gate 634, and the upper gate 634 is pressed against the upper gate 634. The movement is restricted, and at this time, the tension spring 63214 is located above the main gear 6326, and the elastic potential energy is generated by the tension spring 63214, so that the restriction rod 6322 is not easy to move, and the lower gate plate 633 moves to the right and pushes the lever 6329 through the ratchet 6334, so that the restriction rod 6322 moves downward and is inserted into the lower gate plate 633, restricting the movement of the lower gate plate 633 and disconnecting the movement restriction of the upper gate plate 634. Since the ratchet 6334 is inclined, when the upper gate plate 634 and the lower gate plate 633 move to the left, the ratchet 6334 squeezes the lever through the inclined surface on the left side, and the ratchet 6334 contracts, so that the upper gate plate 634 and the lower gate plate 633 do not push the lever when they move to the left;

[0043] Fourth, when the coal powder falls into the boiler, the movement process of the upper gate 634 and the lower gate 633 is: the upper gate 634 is closed, the limiting rod 6322 moves up, the coal powder falls onto the upper gate 634, the lower gate 633 is closed, the limiting rod 6322 moves down, the upper gate 634 is opened, the coal powder falls onto the lower gate 633, the upper gate 634 is closed, the limiting rod 6322 moves up, and the lower gate 633 is opened, so that the coal powder falls into the boiler, and the falling control of the coal powder is completed, so that the upper gate 634 and the lower gate 633 cannot be opened at the same time, so as to avoid the high temperature in the boiler from being transmitted to the feeding assembly 5 and the coal powder in the feeding assembly 5, and the opening of the mechanical structure gate is limited, so the limiting effect is good, and the risk of the coal powder in the feeding assembly 5 being ignited is further reduced.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A powder feeding device for a boiler powder making system, comprising a storage tank (1), a material dropping mechanism (2), a support frame (3), a guide rail (4) and a feeding assembly (5), wherein the bottom end of the storage tank (1) is provided with a material dropping mechanism (2), the bottom edge of the storage tank (1) is fixedly connected to the support frame (3), the feeding assembly (5) moves along the guide rail (4), and the bottom end of the guide rail (4) is fixedly connected to the support frame (3); It is characterized in that It also includes a powder delivery pipe assembly (6), which is arranged on the left side of the bottom of the guide rail (4), and includes a pipe body (61), a feed port (62) and a gate assembly (63). The top of the pipe body (61) is provided with the feed port (62), and the gate assembly (63) is installed in the middle of the left side of the pipe body (61). The bottom end of the pipe body (61) is connected to the powder feed port (7) of the boiler; The gate assembly (63) comprises an outer frame (631), a gate limiting mechanism (632), a lower gate (633), an upper gate (634) and an electric push rod (635). The gate limiting mechanism (632) is arranged at the middle of the inner right end of the outer frame (631). The upper gate (634) and the lower gate (633) are arranged on the upper and lower sides of the inner part of the outer frame (631). The upper gate (634) and the lower gate (633) are arranged on the upper and lower sides of the inner part of the outer frame (631). ) extends into the tube body (61), and electric push rods (635) are respectively installed at the upper and lower ends of the left end of the outer frame (631), and the two electric push rods (635) are respectively connected to the upper gate plate (634) and the lower gate plate (633), and the gate plate limiting mechanism (632) is used to limit the movement of the upper gate plate (634) and the lower gate plate (633), and the outer frame (631) is fixed to the outside of the tube body (61).

2. A powder feeding device for a boiler powder making system according to claim 1, characterized in that: The gate plate limiting mechanism (632) comprises a housing (6321), a limiting rod (6322), a limiting tube (6323), a connecting shaft (6324), a connecting rod (6325), a main gear (6326), a driving gear 1 (6327), a driving gear 2 (6328), a shifting rod 1 (6329), a shifting rod 2 (63210), a movable shaft (63211), an arc groove (63212), a fixing rod (63213) and a tension spring (63214). The right side of the interior of the housing (6321) is penetrated by the limiting rod (6322). The upper and lower sides of the outer part of the limiting rod (6322) are both covered with limiting tubes (6333), and the limiting tubes (6333) are fixedly connected to the housing (6321). The middle part of the front end of the limiting rod (6322) is connected to the connecting rod (6325) through a connecting shaft (6324). The left end of the connecting rod (6325) is connected to the main gear (6326) through a transmission shaft. The bottom of the main gear (6326) is meshed with the driving gear 1 (6327), and the top of the main gear (6326) is meshed with the driving gear 2 (6328). The top end of the lever (6329) is connected to the center of the driving gear (6327) through a transmission shaft, and the bottom end of the lever (6329) extends out of the housing (6321). The bottom end of the lever (63210) is connected to the center of the driving gear (6328) through a transmission shaft, and the top end of the lever (63210) extends out of the top of the housing (6321). The middle part of the front end of the connecting rod (6325) is connected to a movable shaft (63211). The front end surface of the housing (6321) is provided with an arc groove (6321). 2), the front end of the movable shaft (63211) passes through the arc groove (63212), and the movable shaft (63211) slides along the inner wall of the arc groove (63212), a fixed rod (63213) is fixed to the middle of the left end of the shell (6321), and the movable shaft (63211) is elastically connected to the fixed rod (63213) through a tension spring (63214), the rear side of the shell (6321) is fixedly connected to the outer frame (631), and the limiting rod (6322) is used to limit the movement of the lower gate plate (633) and the upper gate plate (634).

3. A powder feeding device for a boiler powder making system according to claim 1, characterized in that: The lower gate plate (633) and the upper gate plate (634) have the same structure, and the lower gate plate (633) and the upper gate plate (634) are symmetrically arranged. The lower gate plate (633) includes a gate plate (6331), a fixed block (6332), a rotating shaft (6333), a ratchet (6334), a torsion spring (6335) and a slot (6336). A fixed block (6332) is fixed to the left side of the top of the gate plate (6331). The interior of the fixed block (6332) is connected to the ratchet (6335) through the rotating shaft (6333). The pawl (6334) is rotatably connected to the fixed block (6332) at one end, the pawl (6334) is elastically connected to the fixed block (6332) through a torsion spring (6335), the top end of the pawl (6334) extends out of the fixed block (6332), a slot (6336) is provided on the left side of the top end of the gate plate (6331), and the slot (6336) is arranged on the right side of the fixed block (6332), the left end of the gate plate (6331) is connected to the electric push rod 1 (635), and the right end of the gate plate (6331) extends into the tube body (61).

4. A powder feeding device for a boiler powder making system according to claim 1, characterized in that: The middle portion of the tube body (61) is arranged obliquely, and the gate assembly (63) is arranged perpendicularly to the middle portion of the tube body (61).

5. The powder feeding device for a boiler powder making system according to claim 2, characterized in that: A sliding groove (63251) is provided on the right side of the interior of the connecting rod (6325), the sliding groove (63251) and the connecting rod (6325) are arranged in parallel, and the connecting shaft (6324) slides along the inner wall of the sliding groove (63251).

6. A powder feeding device for a boiler powder making system according to claim 2, characterized in that: The upper and lower ends of the limiting rod (6322) are both conical, and the inner wall of the limiting tube (6323) is in close contact with the limiting rod (6322).

7. A powder feeding device for a boiler powder making system according to claim 3, characterized in that: The ratchet (6334) of the lower gate plate (633) is tilted upward from left to right, and the ratchet (6334) of the upper gate plate (634) is tilted downward from left to right. The ratchet (6334) of the lower gate plate (633) and the upper gate plate (634) are used to push the first lever (6329) and the second lever (63210) respectively.

8. The powder feeding device for a boiler powder making system according to claim 1, characterized in that: The feeding assembly (5) comprises a feeding frame (51), a gate valve (52), a roller (53), a driving motor (54) and a second blanking mechanism (55); the gate valve (52) is installed on the top of the feeding frame (51); the roller (53) and the driving motor (54) are installed on the outer wall of the feeding frame (51); the driving motor (54) is connected to the roller (53) in a transmission manner; the second blanking mechanism (55) is installed at the bottom end of the feeding frame (51), and the roller (53) moves along the guide rail (4).

9. A powder feeding device for a boiler powder making system according to claim 8, characterized in that: The second material drop mechanism (55) has the same structure as the first material drop mechanism (2). The second material drop mechanism (55) comprises a drop pipe (551), a second gate valve (552), a support plate (553), a movable pipe (554), a fitting plate (555) and a second electric push rod (556). The second gate valve (552) is installed on the top of the drop pipe (551). The support plate (553) is fixed in the middle of the outer wall of the drop pipe (551). The movable pipe (554) is sleeved on the drop pipe (551). The bottom of the outer wall of the material tube (551) and the bottom of the outer wall of the drop tube (554) are provided with a bonding plate (555), the top end of the bonding plate (555) is connected to the second electric push rod (556), and the top end of the second electric push rod (556) is fixedly connected to the support plate (553), the top end of the drop tube (551) of the second drop mechanism (55) is connected to the feeding frame (51), and the top end of the drop tube (551) of the first material mechanism (2) is connected to the storage tank (1).

10. The powder feeding device for a boiler powder making system according to claim 3, characterized in that: A heat insulation plate is provided in the middle of the gate plate (6331).

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