Hot air door device of boiler coal mill

Abstract

The utility model discloses a hot air door device of a boiler coal mill, and relates to the field of mechanical equipment. The door plate is arranged in a door frame in a pushing mode, an assembly electromagnet is magnetically attracted to the front face of the door plate, and a support is arranged in front of the door plate; a driving device is fixedly installed on the support, a driving rod is horizontally and movably arranged on the support, the output end of the driving device is in magnetic attraction fit with the driving rod through a driving electromagnet, a connecting rod is arranged at the free end of the driving rod in a front-back moving mode, and the connecting rod and the assembling electromagnet are fixedly installed. The utility model has the beneficial effects that the driving device and the driving rod are assembled with the door plate in a magnetic attraction manner by means of the driving electromagnet and the assembling electromagnet, so that the door plate is driven to open and close and is separated from contact, heat conduction is blocked, and the running reliability and safety of the driving device are improved.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical equipment, relates to the field of boiler coal mill, and specifically relates to a hot air door device of a boiler coal mill. Background Art

[0002] A boiler coal mill is a device used to grind coal powder into fine powder and transport it to the boiler for combustion. When the coal mill is grinding, a hot air door is needed to adjust the temperature and air volume inside the coal mill to ensure the normal operation of the coal mill.

[0003] The hot air door of the coal mill adjusts the temperature and air volume inside the coal mill by controlling the movement of the door panel in the door frame. The drive device of the hot air door of the coal mill commonly used now is usually directly assembled with the door panel, and the heat on the boiler coal mill is directly transferred to the drive device through the door panel, which can easily cause the drive device to overheat. This affects the safety and reliability of the drive device and easily reduces the service life of the drive device. Utility Model Content

[0004] The utility model is to solve the technical problem that the hot air door and the driving device are easily damaged by overheating when directly assembled, and provides a hot air door device for a boiler coal mill. The driving device and the driving rod are assembled with the door plate by magnetic attraction with the help of the driving electromagnet and the assembly electromagnet, so as to drive the door plate to open and close and conveniently disengage from the door plate, block the conduction of heat, and improve the reliability and safety of the operation of the driving device.

[0005] The technical solution adopted by the utility model is: to provide a hot air door device of a boiler coal mill, including a door panel arranged in a door frame, wherein an assembly electromagnet is magnetically attracted on the front side of the door panel, and a bracket is arranged in front of the door panel; a driving device and a driving rod are fixedly installed on the bracket for horizontal movement, the output end of the driving device is magnetically matched with the driving rod through the driving electromagnet, and a connecting rod is arranged on the free end of the driving rod for forward and backward movement, and the connecting rod is fixedly installed with the assembly electromagnet.

[0006] The driving device drives the electromagnet and the driving rod to be magnetically attracted, so that the driving rod moves horizontally along the bracket, and the connecting rod at the free end of the driving rod is magnetically attracted to the door panel with the help of the assembled electromagnet, so as to drive the door panel to move along the door frame to control the opening and closing of the hot air door. After the door panel is driven, the assembled electromagnet and the driving electromagnet are respectively separated from the contact with the door panel and the driving rod, thereby blocking the conduction of heat from the door panel and avoiding thermal damage to the driving device and the driving rod. A gap is set between the bracket and the door panel to reduce heat conduction and improve safety in use.

[0007] To further optimize the technical solution, the driving device includes a driving motor arranged in front of the driving rod, the driving motor is fixedly installed on the bracket, the output end of the driving motor is assembled with the driving electromagnet for forward and backward movement with the help of a connecting piece, and the driving electromagnet is magnetically attracted to cooperate with a transmission assembly, and the transmission assembly is assembled with the driving rod.

[0008] The driving motor is fixedly installed on the bracket, and the driving electromagnet and the output end of the driving device are arranged to move forward and backward so as to drive the electromagnet to magnetically attract and disengage from the transmission component. After the driving electromagnet is magnetically attracted to the driving component, the driving rod is made to run along the bracket, which is flexible to use.

[0009] To further optimize the technical solution, the transmission assembly includes a rack fixedly mounted on the outer wall of the driving rod and a gear meshingly assembled with the rack, the gear is rotatably mounted on the bracket, and the gear is magnetically matched with the driving electromagnet.

[0010] After the driving electromagnet and the gear are magnetically attracted, the driving motor drives the gear to run synchronously, the rack and the driving rod are fixedly installed, and the gear and the rack are meshed to make the driving rod move horizontally along the bracket. The gear and rack meshing structure is simple and flexible and reliable to use.

[0011] To further optimize the technical solution, the outer wall of the driving rod is provided with an installation groove along the length direction, the installation groove is fixedly installed with the rack, and the driving rod is assembled with the aid of a support and a bracket; the support and the bracket are fixedly installed, the driving rod and the support are horizontally movably installed, and the gear and the support are fixedly installed.

[0012] The driving rod is installed horizontally with a support fixed on the bracket, the gear is installed rotationally with the support, and the rack is installed in the installation groove on the driving rod. It is easy to install and firm to use. After the gears are meshed with each other, the driving rod can move horizontally along the support.

[0013] To further optimize the technical solution, the connecting piece includes a sleeve coaxially sleeved with the output end of the driving motor, the sleeve is fixedly installed with the driving electromagnet; an elastic pulling member is installed in the sleeve, and the elastic pulling member is fixedly connected with the output end of the driving motor.

[0014] The sleeve of the driving motor output end moves forward and backward and is fixedly installed with the driving electromagnet. When the driving electromagnet is energized, it is magnetically attracted to the gear to pull the sleeve to move along the output end of the driving motor and pull the elastic pulling component in the sleeve. After the driving electromagnet is powered off, the elastic pulling component pulls the sleeve to reset the sleeve, so that the driving electromagnet is out of contact with the gear, the driving rod is out of drive, and the conduction of heat is blocked.

[0015] To further optimize the technical solution, a connecting tube is fixedly installed on the free end of the driving rod, the connecting tube and the connecting rod are coaxially sleeved, and the connecting rod and the connecting tube are assembled to move forward and backward; an elastic pulling member is installed in the connecting tube, and the elastic pulling member is fixedly connected to the connecting rod.

[0016] The device for moving the connecting rod and the connecting cylinder forward and backward generates magnetism when the assembly electromagnet is energized and is magnetically attracted to the door panel, so that the assembly electromagnet pulls the connecting rod to move along the connecting cylinder and pulls the elastic pulling component. After the assembly electromagnet is powered off and loses its magnetism, the elastic pulling component pulls the connecting rod to reset, thereby causing the assembly electromagnet to break contact with the door panel and block the conduction of heat.

[0017] To further optimize the technical solution, the elastic pulling member is a traction spring.

[0018] The elastic pulling member can use a traction spring, which has a simple structure and is stable and reliable in use.

[0019] The beneficial effects of the utility model are:

[0020] 1. The bracket is set in front of the door panel so that there is a gap between the bracket and the door panel to reduce the heat on the door panel from spreading to the drive motor and drive rod on the bracket, reduce the thermal damage to the drive motor and drive rod, and improve the safety of use;

[0021] 2. After the assembly electromagnet and the driving electromagnet are energized, magnetism is generated so as to be magnetically connected with the door panel and the driving rod respectively. The driving motor controls the horizontal movement of the driving rod through the driving electromagnet. The driving rod is magnetically attracted with the door panel through the assembly electromagnet, so that the driving rod drives the door panel to move along the door frame through the connecting rod, thereby controlling the opening and closing of the hot air door on the coal mill, which is flexible to use;

[0022] 3. After the door panel is driven, the assembly electromagnet and the driving electromagnet are powered off and lose their magnetism, so that the assembly electromagnet and the driving electromagnet are separated from the contact with the door panel and the driving rod, respectively, and the heat on the door panel is blocked from being transferred to the driving rod and the driving motor, thereby improving the safety of the protection of the driving motor and the driving rod and making the operation reliable;

[0023] 4. When the assembly electromagnet and the driving electromagnet magnetically attract the door panel and the driving rod respectively, the assembly electromagnet pulls the connecting rod to move along the connecting tube, and the driving electromagnet pulls the sleeve to move, thereby pulling the traction spring to store force. After the drive is completed, the traction spring pulls the assembly electromagnet and the driving electromagnet to reset and break contact with the door panel and the driving rod, which is smooth and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a hot air door device for a boiler coal mill according to this embodiment;

[0025] Figure 2 This is a schematic diagram of the structure of the door panel of this embodiment being used to move along the door frame;

[0026] Figure 3It is a schematic diagram of the structure of the driving device and the driving rod driving assembly of this embodiment;

[0027] Figure 4 It is a structural schematic diagram of the assembly of the bracket and the support of this embodiment;

[0028] Figure 5 It is a schematic diagram of the structure of the sleeve and the drive motor assembly of this embodiment;

[0029] Figure 6 It is a structural tensile diagram of the assembly of the sleeve and the drive motor of this embodiment;

[0030] Figure 7 It is a schematic cross-sectional structure diagram of the assembly of the connecting rod and the connecting cylinder of this embodiment.

[0031] In the figure, 1, door frame; 2, door panel; 3, assembly electromagnet; 4, bracket; 401, support; 5, driving rod; 501, mounting groove; 6, driving electromagnet; 7, connecting rod; 8, driving motor; 801, sleeve; 9, rack; 10, gear; 11, elastic pulling member; 12, connecting tube. DETAILED DESCRIPTION

[0032] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] Please see attached Figure 1-2 A hot air door device for a boiler coal mill comprises a door panel 2 which is arranged in a door frame 1 for pushing, a mounting electromagnet 3 is magnetically attracted on the front of the door panel 2, and a bracket 4 is arranged in front of the door panel 2, and there is a gap between the bracket 4 and the front of the door panel 2 to reduce the heat transfer from the door panel 2 to the bracket 4, a driving device is fixedly installed on the bracket 4 and a driving rod 5 is arranged for horizontal movement to reduce the heat damage of the driving device and the driving rod 5 to the heat wave, the output end of the driving device is magnetically matched with the driving rod 5 through the driving electromagnet 6, and the free end of the driving rod 5 is arranged for forward and backward movement with a connecting rod 7, the connecting rod 7 is fixedly installed with the mounting electromagnet 3, and the assembly electromagnet 3 and the driving electromagnet 6 are controlled by controlling the on and off of the circuit. The generation and disappearance of the magnetic attraction of the electromagnet 3 and the driving electromagnet 6, after the assembly electromagnet 3 is energized, the connecting rod 7 is pulled to move along the driving rod 5 and magnetically attract the door panel 2, and then the driving electromagnet 6 is magnetically attracted to the driving rod 5, and the power of the driving device is transmitted to the driving rod 5, so that the driving rod 5 drives the door panel 2 to move on the door frame 1 to push the door panel 2 to open and close, and after the door panel 2 is driven, the assembly electromagnet 3 and the driving electromagnet 6 are powered off, so that they lose the magnetic attraction, and the assembly electromagnet 3 and the driving electromagnet 6 are respectively disconnected from the door panel 2 and the driving rod 5, thereby disconnecting from the contact with the door panel 2, blocking the conduction of heat from the door panel 2, and improving the safety of the operation of the driving device and the driving rod 5 and the reliability of use;

[0034] Please see attached Figure 3-4 The driving device includes a driving motor 8 arranged in front of the driving rod 5, the driving motor 8 is fixedly installed with the bracket 4, the output end of the driving motor 8 is assembled with the driving electromagnet 6 for forward and backward movement by means of a connecting piece, the connecting piece includes a sleeve 801 coaxially mounted with the output end of the driving motor 8, the sleeve 801 is fixedly installed with the driving electromagnet 6, an elastic pulling member 11 is installed in the sleeve 801, the elastic pulling member 11 is fixedly connected with the output end of the driving motor 8, the elastic pulling member 11 pulls the sleeve 801, the elastic pulling member 11 can choose a traction spring, the driving electromagnet 6 is magnetically attracted and equipped with a transmission assembly, the transmission assembly includes a rack 9 fixedly installed with the outer wall of the driving rod 5 and a gear 10 meshing with the rack 9, the driving rod 5 is assembled with the bracket by means of a support 401 4 assembly, the support 401 is fixedly installed with the bracket 4, the driving rod 5 is installed horizontally and movably with the support 401, the gear 10 is rotatably installed with the support 401, the gear 10 is meshed and assembled with the rack 9, the outer wall of the driving rod 5 is provided with a mounting groove 501 along the length direction, the mounting groove 501 is fixedly installed with the rack 9, the driving electromagnet 6 is magnetically matched with the gear 10, when the driving rod 5 is driven to move horizontally, the driving electromagnet 6 is energized to generate magnetic force, the driving electromagnet 6 is magnetically attracted with the gear 10, so as to pull the sleeve 801 to move along the output end of the driving device, and to pull the traction spring in the sleeve 801, and after the driving is completed, the driving electromagnet 6 is powered off, so that the traction spring pulls the sleeve 801 backwards, so that the driving electromagnet 6 is disconnected from the gear 10, and the heat conduction is blocked;

[0035] Please see attached Figure 5-7 , the free end of the driving rod 5 is fixedly installed with a connecting tube 12, the connecting tube 12 is coaxially mounted with the connecting rod 7, the connecting rod 7 and the connecting tube 12 are assembled and moved forward and backward, and an elastic traction member is also installed in the connecting tube 12, the elastic traction member is fixedly connected to the connecting rod 7, and the elastic traction member can also be a traction spring, the traction spring pulls the connecting rod 7, the connecting rod 7 is fixedly installed with the assembly electromagnet 3, so that the assembly electromagnet 3 is out of contact with the door panel 2, after the assembly electromagnet 3 is energized to generate magnetism, the assembly electromagnet 3 is magnetically attracted to the door panel 2, and the connecting rod 7 is pulled to move along the connecting tube 12, and the traction spring is pulled, after the driving is completed, the assembly electromagnet 3 is powered off and loses its magnetism, so that the traction spring pulls the connecting rod 7 to reset, so that the assembly electromagnet 3 is out of contact with the door panel 2, and the heat conduction of the door panel 2 is blocked;

[0036] The working principle of the hot air door device of the boiler coal mill is as follows: after the door panel 2 is assembled with the coal mill through the door frame 1, the door panel 2 is driven to move. When the hot air door is opened and closed, the assembly electromagnet 3 and the driving electromagnet 6 are energized to generate magnetism, so that the assembly electromagnet 3 and the driving electromagnet 6 are magnetically connected to the door panel 2 and the gear 10 respectively. When the assembly electromagnet 3 is magnetically connected to the door panel 2, the assembly electromagnet 3 pulls the connecting rod 7 to move along the connecting tube 12 and pulls the traction spring in the connecting tube 12. When the driving electromagnet 6 is magnetically connected to the gear 10, the driving electromagnet pulls the sleeve 801 to move along the output end of the driving motor 8, and also pulls the traction spring in the sleeve 801, and then the driving motor 8 is energized to run;

[0037] When the driving motor 8 drives the gear 10 to rotate through the driving electromagnet 6, the gear 10 meshes with the rack 9, so that the driving rod 5 moves horizontally along the support 401, and the driving rod 5 drives the door plate 2 to move along the door frame 1 through the connecting rod 7 and the assembly electromagnet 3, so as to control the opening and closing of the hot air door of the coal mill;

[0038] After the door panel 2 is driven, the assembly electromagnet 3 and the driving electromagnet 6 are powered off respectively to make them lose their magnetism. At this time, the traction spring in the pulling state pulls the assembly electromagnet 3 and the driving electromagnet 6 to reset, so that the assembly electromagnet and the driving electromagnet 6 are separated from the contact with the door panel 2 and the gear 10, blocking the conduction of heat on the door panel 2. A gap is set between the bracket 4 and the door panel 2 to reduce the heat dissipated by the door panel 2. The heat damage to the drive motor 8 and the drive rod 5 caused by the heat, thereby improving the safety of use.

Claims

1. A hot air door device for a boiler coal mill, comprising a door plate (2) arranged in a door frame (1) for displacement, characterized in that: The front side of the door panel (2) is magnetically attracted with an assembly electromagnet (3), and a bracket (4) is arranged in front of the door panel (2); a driving device is fixedly mounted on the bracket (4) and a driving rod (5) is arranged horizontally for movement; the output end of the driving device is magnetically matched with the driving rod (5) through a driving electromagnet (6); a connecting rod (7) is arranged at the free end of the driving rod (5) for movement forward and backward; and the connecting rod (7) is fixedly mounted with the assembly electromagnet (3).

2. A hot air door device for a boiler coal mill according to claim 1, characterized in that: The driving device comprises a driving motor (8) arranged in front of the driving rod (5), the driving motor (8) being fixedly mounted on the bracket (4), the output end of the driving motor (8) being assembled with the driving electromagnet (6) by means of a connecting piece for forward and backward movement, and the driving electromagnet (6) being magnetically attracted to be matched with a transmission assembly, and the transmission assembly being assembled with the driving rod (5).

3. A hot air door device for a boiler coal mill according to claim 2, characterized in that: The transmission assembly comprises a rack (9) fixedly mounted on the outer wall of the driving rod (5) and a gear (10) meshingly assembled with the rack (9); the gear (10) is rotatably mounted on the bracket (4), and the gear (10) is magnetically matched with the driving electromagnet (6).

4. A hot air door device for a boiler coal mill according to claim 3, characterized in that: The outer wall of the driving rod (5) is provided with a mounting groove (501) along the length direction; the mounting groove (501) is fixedly mounted on the rack (9); and the driving rod (5) is assembled with the bracket (4) by means of a support (401); the support (401) is fixedly mounted on the bracket (4), the driving rod (5) is horizontally movable mounted on the support (401), and the gear (10) is rotatably mounted on the support (401).

5. The hot air door device of a boiler coal mill according to claim 2, characterized in that: The connecting member comprises a sleeve (801) coaxially sleeved with the output end of the driving motor (8), the sleeve (801) being fixedly mounted on the driving electromagnet (6); an elastic pulling member (11) is mounted in the sleeve (801), and the elastic pulling member (11) is fixedly connected to the output end of the driving motor (8).

6. The hot air door device of a boiler coal mill according to claim 1, characterized in that: A connecting tube (12) is fixedly mounted on the free end of the driving rod (5), the connecting tube (12) is coaxially sleeved with the connecting rod (7), and the connecting rod (7) and the connecting tube (12) are assembled to move forward and backward; an elastic pulling member (11) is installed in the connecting tube (12), and the elastic pulling member (11) is fixedly connected to the connecting rod (7).

7. A hot air door device for a boiler coal mill according to claim 5 or 6, characterized in that: The elastic pulling member (11) is a traction spring.

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