Control valve for controlling air volume of thermal power generating unit

Abstract

The utility model relates to the technical field of air volume control valves, in particular to a control valve for controlling the air volume of a thermal power generating unit. Comprising a manual control device and an electric control device, the manual control device has a clutch function, when a double-output motor of the electric control device does not work, rotation of an electric control hinge of the electric control device can be connected through the manual control device, and then the reliability of the control valve is improved; through the combined action of the electric control device and the manual control device, the manual control device and the electric control device can work independently and can also be matched with each other, and when the electric control device breaks down or manual emergency intervention is needed, the air volume can be adjusted through the manual control device; in the normal operation state, the electric control device can automatically adjust the air volume according to a preset program or information fed back by the sensor, and stable operation of the thermal power generating unit is ensured.

Description

Technical Field

[0001] This utility model relates to the field of air volume control valve technology, specifically a control valve for controlling the air volume of thermal power units. Background Technology

[0002] Airflow control is crucial during the operation of thermal power units. Traditional airflow control valves often only have a single control method. If a purely electrically controlled airflow control valve fails in the electrical system, such as motor damage or circuit failure, the entire airflow control function will fail, affecting the normal operation of the thermal power unit and possibly even causing the unit to shut down. On the other hand, control valves that rely solely on manual control are difficult to meet the needs of modern thermal power units for automated and precise control, and manual operation is difficult to continuously and accurately adjust the airflow under complex operating conditions. Utility Model Content

[0003] The purpose of this utility model is to provide a control valve for controlling the air volume of thermal power units, which is equipped with an electronic control device and a manual control device that work together. The manual control device and the electronic control device can work independently or cooperate with each other to ensure the stable operation of thermal power units.

[0004] To achieve the aforementioned technical effects, this utility model discloses a control valve for controlling the air volume of a thermal power unit, comprising a ventilation pipe, a protective box, and a manual control device. The bottom of the protective box is fixedly connected to the outer wall of the top of the ventilation pipe. The manual control device includes a rotating rod, the upper end of which extends out of the top wall of the protective box. A handle is fixedly connected to the upper end of the rotating rod extending out of the top wall of the protective box. The rotating rod is rotatably connected to the top wall of the protective box. The lower end of the rotating rod extends into the interior of the ventilation pipe. The rotating rod is fixedly connected to a support bracket on the top wall of the ventilation pipe. A manual hinge is fixedly connected to the lower end of the rotating rod. A fixed shaft is provided at the center of the manual hinge along the height direction. The top end of the fixed shaft of the manual hinge is fixedly connected to the lower end of the rotating rod. There are two rotating rods and two manual hinges, which are symmetrically arranged about the center of the ventilation pipe width direction.

[0005] Furthermore, it includes an electrical control device, which comprises an insulation plate, a dual-output motor, and electrically controlled hinges. The insulation plate is fixedly connected to the top wall of the ventilation duct, and the dual-output motor is fixedly connected to the top surface of the insulation plate. The dual-output motor is fixedly connected to the top surface of the insulation plate, and its axis is set along the width direction of the ventilation duct. Both output ends of the dual-output motor are fixedly connected to a driving bevel gear. There are two electrically controlled hinges, which are symmetrically arranged about the center of the ventilation duct width direction. Each electrically controlled hinge has a fixed shaft at its center along the height direction, and the upper end of the fixed shaft extends out of the top wall of the ventilation duct. The upper end of the fixed shaft of each electrically controlled hinge is rotatably connected to the top wall of the ventilation duct. The upper end of the fixed shaft of each electrically controlled hinge is fixedly connected to a driven bevel gear, which is located inside the protective box. The two driven bevel gears mesh with the two driving bevel gears respectively.

[0006] Further, the hand control device comprises long-tooth gears, a limiting frame and a screw rod, the two long-tooth gears are coaxially arranged on the two rotating rods respectively, the long-tooth gears are arranged in the protective box, the limiting frame comprises a T-shaped support and an internally-threaded seat, a screw hole is arranged in the center of the internally-threaded seat, the T-shaped support of the limiting frame is composed of a horizontal bar and a vertical bar, the internally-threaded seat is arranged in the center of the vertical bar of the T-shaped support of the limiting frame, the horizontal bar of the T-shaped support of the limiting frame is rotatably connected with a clutch block at both ends, the clutch block is arranged below the limiting frame, an external gear part is arranged on the upper part of each clutch block, the upper end of the screw rod extends out of the top wall of the protective box, the screw rod is rotatably connected with the top wall of the protective box, a handle is fixedly connected with the upper end of the screw rod extending out of the top wall of the protective box, the lower part of the screw rod is screw-connected in the screw hole of the internally-threaded seat, two racks are slidably connected with the internally-threaded seat arranged on the bottom surface of the limiting frame, a sliding rail block is arranged on the bottom surface of the limiting frame for the sliding connection of the racks, the two racks are respectively engaged with the external gears of the two clutch blocks, and the ends, away from the clutch blocks, of the two racks are respectively engaged with the two long-tooth gears.

[0007] Further, the hand control device comprises a limiting rod, and the limiting rod is fixedly connected with the inner top wall of the protective box, the electric control device comprises a positioning rod, and the bottom surface of the positioning rod is fixedly connected with the top surface of the temperature insulation plate, the vertical bar of the T-shaped support of the limiting frame is provided with two limiting holes, the two limiting holes are respectively arranged on the two sides of the internally-threaded seat, and the limiting rod and the positioning rod are respectively slidably connected in the two limiting holes.

[0008] Further, the two hand control hinges are parallel, the two electric control hinges are parallel, and the two hand control hinges and the two electric control hinges are parallel.

[0009] Further, the external gear part on the upper part of the clutch block and the long-tooth gears are of the same gear modulus, gear tooth number, gear pressure angle and gear diameter, and the external gear part on the upper part of the clutch block and the long-tooth gears are gears of the same specification.

[0010] The hand control device and the electric control device have the advantages that:

[0011] The hand control device has a clutch function, when the double output motor of the electric control device does not work, the electric control hinge of the electric control device can be rotated through the hand control device, and the reliability of the control valve is improved; the hand control device and the electric control device can work independently or cooperatively, when the electric control device fails or manual emergency intervention is needed, the air volume can be adjusted through the hand control device; under the normal operation state, the electric control device can automatically adjust the air volume according to the preset program or the information fed back by the sensor, and the stable operation of the thermal power generating unit is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the front view of the utility model;

[0013] Figure 2 is the sectional view of the utility model;

[0014] Figure 3 is the structural schematic view of the hand control device of the utility model;

[0015] Figure 4 is the structural schematic view of the electric control device of the utility model.

[0016] In the drawing: 1. Ventilation pipe; 2. Protective box; 3. Hand control device; 4. Electric control device; 31. Rotary rod; 32. Hand control hinge; 33. Long tooth gear; 34. Rack; 35. Clutch block; 36. Limit frame; 37. Screw rod; 38. Limit rod; 39. Limit hole; 41. Temperature insulation plate; 42. Double output motor; 43. Directional plate; 44. Driving bevel gear; 45. Driven bevel gear; 46. Electric control hinge; 47. Synchronous ring; 48. Positioning rod. DETAILED DESCRIPTION

[0017] As Figures 1-4 shown, the utility model discloses a control valve for controlling the air volume of thermal power generating unit includes ventilation pipe 1, protective box 2 and hand control device 3, and the outer wall fixed connection of protective box 2 bottom and ventilation pipe 1 top, hand control device 3 includes rotary rod 31, and rotary rod 31 upper end stretches out protective box 2 top wall, and rotary rod 31 stretches out the upper end fixed connection of protective box 2 top wall, and rotary rod 31 rotationally connects on protective box 2 top wall, and rotary rod 31 lower end stretches into ventilation pipe 1 inside, and rotary rod 31 and ventilation pipe 1 top wall notice support fixed connection, and rotary rod 31 lower end fixed connection has hand control hinge 32, and the fixed shaft of hand control hinge 32 center is along height direction and is equipped with, and the fixed shaft top of hand control hinge 32 and rotary rod 31 lower end fixed connection, and rotary rod 31 and hand control hinge 32 all are equipped with two, and two rotary rod 31 and hand control hinge 32 are with the center symmetry of ventilation pipe 1 width direction and set up.

[0018] The rotating rod 31 is an input component for manual operation. When the operator rotates the rotating rod 31, the hand-operated hinge 32 connected to the rotating rod 31 rotates in the ventilation pipe 1, and the air volume is adjusted by changing the angle of the hand-operated hinge 32 in the ventilation pipe 1.

[0019] The electric control device 4 includes a temperature insulation plate 41, a double-output motor 42, and an electric control hinge 46. The temperature insulation plate 41 is fixedly connected to the top wall of the ventilation pipe. The double-output motor 42 is fixedly connected to the top surface of the temperature insulation plate 41. The double-output motor 42 has two output ends, each of which is fixedly connected to a driving bevel gear 44. The electric control hinge 46 is provided with two electric control hinges 46, which are symmetrically arranged along the center of the width direction of the ventilation pipe 1. Each electric control hinge 46 has a fixed shaft arranged along the height direction. The upper end of the fixed shaft protrudes out of the top wall of the ventilation pipe 1. The upper end of the fixed shaft of each electric control hinge 46 is rotatably connected to the top wall of the ventilation pipe 1. The upper end of the fixed shaft of each electric control hinge 46 is fixedly connected to a driven bevel gear 45. The driven bevel gear 45 is arranged inside the protective box 2. The two driven bevel gears 45 are respectively engaged with the two driving bevel gears 44.

[0020] The double-output motor 42 serves as a power source. Its output end is connected to the driving bevel gear 44 and is fixed and guided by the directional plate 43. When the double-output motor 42 is started, the driving bevel gear 44 at the output end rotates. The driving bevel gear 44 is engaged with the driven bevel gear 45, thereby driving the driven bevel gear 45 to rotate. The driven bevel gear 45 drives the electric control hinge 46 to rotate in the ventilation pipe 1, thereby adjusting the air volume. The double-output motor 42 quickly and accurately adjusts the rotating speed and direction according to the instructions of the control system, thereby accurately controlling the electric control hinge 46, and meeting the demand for air volume of the thermal power unit under different working conditions.

[0021] The main function of the temperature insulation plate 41 is to block heat transfer and protect the electrical elements inside the electric control device 4 from high temperature, thereby ensuring that the electric control device 4 can work normally in the high-temperature environment of the thermal power unit.

[0022] The hand control device 3 comprises two long-toothed gears 33, a limiting frame 36 and a screw rod 37, the two long-toothed gears 33 are coaxially arranged on the two rotating rods 31 respectively, the long-toothed gears 33 are arranged inside the protective box 2, the limiting frame 36 comprises a T-shaped support and an internally-threaded seat, the internally-threaded seat is provided with a screw hole in the center, the T-shaped support of the limiting frame 36 is composed of a horizontal bar and a vertical bar, the internally-threaded seat is arranged at the center of the vertical bar of the T-shaped support of the limiting frame 36, the horizontal bar of the T-shaped support of the limiting frame 36 is rotatably connected with a clutch block 35 at both ends, the clutch block 35 is arranged below the limiting frame 36, the clutch block 35 is provided with an external gear part at the upper part, the screw rod 37 extends out of the top wall of the protective box 2, the screw rod 37 is rotatably connected with the top wall of the protective box 2, the upper end of the screw rod 37 extending out of the top wall of the protective box 2 is fixedly connected with a handle, the lower part of the screw rod 37 is threadedly connected in the screw hole of the internally-threaded seat, the internally-threaded seat is slidably connected with two racks 34 on the bottom surface of the limiting frame 36, the bottom surface of the limiting frame 36 is provided with a sliding rail block for the sliding connection of the rack 34, the two racks 34 are respectively engaged with the external gears of the two clutch blocks 35, and the ends of the two racks 34 away from the clutch blocks 35 are respectively engaged with the two long-toothed gears 33; the electric control device 4 comprises two synchronous rings 47, the two synchronous rings 47 are fixedly connected with the top surfaces of the two driven bevel gears 45 respectively, the top surfaces of the two synchronous rings 47 are provided with connecting grooves, the bottom surfaces of the two clutch blocks 35 are connected with connecting blocks, and the connecting blocks of the bottom surfaces of the two clutch blocks 35 are respectively engaged with the connecting grooves of the top surfaces of the two synchronous rings 47; the hand control device 3 comprises a limiting rod 38, and the top end of the limiting rod 38 is fixedly connected with the inner top wall of the protective box 2; the electric control device 4 comprises a positioning rod 48, and the bottom surface of the positioning rod 48 is fixedly connected with the top surface of the temperature insulation plate 41; the vertical bar of the T-shaped support of the limiting frame 36 is provided with two limiting holes 39, the two limiting holes 39 are respectively arranged on the two sides of the internally-threaded seat, and the limiting rod 38 and the positioning rod 48 are respectively slidably connected in the two limiting holes 39.

[0023] The two hand control hinges 32 are parallel, the two electric control hinges 46 are parallel, and the two hand control hinges 32 and the two electric control hinges 46 are parallel.

[0024] The external gear part at the upper part of the clutch block 35 and the gear modulus, gear tooth number, gear pressure angle and gear diameter of the long-toothed gear 33 are all the same, and the external gear part at the upper part of the clutch block 35 and the long-toothed gear 33 are gears of the same specification.

[0025] The limiting frame 36 and the screw rod 37 play a role of disengaging, the screw rod 37 is in threaded connection with the limiting frame 36, when the screw rod 37 is rotated, the limiting frame 36 can move up and down along the screw rod 37, the limiting frame 36 is also limited through the cooperation of the limiting rod 38, the positioning rod 48 and the limiting hole 39, and stable up and down movement of the limiting frame 36 is ensured, when the limiting frame 36 moves up and down, the rotating clutch block 35 and the sliding rack 34 in the limiting frame 36 will synchronously move along with the limiting frame 36, at this time, the rack 34 slides on the tooth groove of the long-tooth gear 33, when the limiting frame 36 moves downwards to cause the connecting blocks on the bottom surfaces of the two clutch blocks to be engaged with the connecting grooves on the top surfaces of the two synchronous rings 47, the hand control device and the electric control device are connected, at this time, the worker rotates the rotating rod 31, so that the long-tooth gear 33 is rotated, since the rack 34 and the long-tooth gear 33 are engaged, the rotation of the long-tooth gear 33 drives the rack 34 to move, the rack 34 moves and further drives the clutch block 35 to rotate, the rotation of the clutch block 35 drives the synchronous ring 47 to rotate, so that the hand control hinge 32 and the electric control hinge 46 are synchronously rotated.

[0026] Since the hand control device 3 can stably work under partial extreme conditions, when the double-output motor 42 of the electric control device 4 does not work, the electric control hinge 46 of the electric control device 4 can be connected by the hand control device 3, so that the reliability of the control valve is improved.

[0027] In the utility model, the hand control device 3 and the electric control device 4 can work independently or cooperate with each other, when the electric control device 4 fails or needs manual emergency intervention, the air volume can be adjusted through the hand control device 3, under normal operating conditions, the electric control device 4 can automatically adjust the air volume according to the preset program or the information fed back by the sensor, so that the stable operation of the thermal power generating set is ensured, under special conditions, the double-output motor 42 of the electric control device 4 does not work, the limiting frame 36 can be lowered to cause the clutch block 35 and the synchronous ring 47 to engage, so that the electric control hinge 46 with good working condition is deflected, and the safety of the thermal power generating set is ensured.

Claims

1. A control valve for controlling the air flow of a thermal power unit, characterized in that: The utility model relates to a kind of ventilation pipe, including protective box (2) and hand control device (3), protective box (2) bottom and ventilation pipe (1) top outer wall fixed connection, hand control device (3) includes rotating rod (31), rotating rod (31) upper end extends protective box (2) top wall, rotating rod (31) upper end fixedly connected with handle extending protective box (2) top wall, rotating rod (31) is rotatably connected on protective box (2) top wall, rotating rod (31) lower end extends into ventilation pipe (1) inside, rotating rod (31) and ventilation pipe (1) top wall notice support fixed connection, rotating rod (31) lower end is fixedly connected with hand control hinge (32), hand control hinge (32) center is provided with fixed shaft along height direction, the fixed shaft top end of hand control hinge (32) is fixedly connected with rotating rod (31) lower end, rotating rod (31) and hand control hinge (32) are equipped with two, two rotating rod (31) and hand control hinge (32) are symmetrically arranged with the center of ventilation pipe (1) width direction.

2. The control valve for controlling the air volume of a thermal power unit according to claim 1, characterized in that: Including electric control device (4), electric control device (4) includes temperature insulation plate (41), double-output motor (42) and electric control hinge (46), temperature insulation plate (41) is fixedly connected on ventilation pipe top wall, double-output motor (42) is fixedly connected on temperature insulation plate (41) top surface, temperature insulation plate (41) top surface is fixedly connected with double-output motor (42), double-output motor (42) axis is arranged along ventilation pipe (1) width direction, two output ends of double-output motor (42) are fixedly connected with driving bevel gear (44), electric control hinge (46) is equipped with two, two electric control hinges (46) are symmetrically arranged with the center of ventilation pipe (1) width direction, the fixed shaft of each electric control hinge (46) is provided with along height direction, fixed shaft upper end extends ventilation pipe (1) top wall, the fixed shaft upper end of each electric control hinge (46) is rotatably connected on ventilation pipe (1) top wall, the fixed shaft upper end of each electric control hinge (46) is fixedly connected with driven bevel gear (45), driven bevel gear (45) is arranged in protective box (2) inside, two driven bevel gears (45) are meshed with two driving bevel gears (44) respectively.

3. The control valve for controlling the air volume of a thermal power unit according to claim 2, characterized in that: The hand control device (3) comprises long-toothed gears (33), a limiting frame (36) and a screw rod (37), the long-toothed gears (33) are provided with two, the two long-toothed gears (33) are coaxially arranged on two rotating rods (31) respectively, the long-toothed gears (33) are arranged in the protective box (2), the limiting frame (36) comprises a T-shaped support and an internally-threaded seat, the internally-threaded seat is provided with a screw hole in the center, the T-shaped support of the limiting frame (36) is composed of a horizontal bar and a vertical bar, the internally-threaded seat is arranged in the center of the vertical bar of the T-shaped support of the limiting frame (36), the horizontal bar of the T-shaped support of the limiting frame (36) is rotatably connected with a clutch block (35) at both ends, the clutch block (35) is arranged below the limiting frame (36), the clutch block (35) is provided with an external gear part on the upper part, the screw rod (37) is arranged on the top wall of the protective box (2), the screw rod (37) is rotatably connected with the top wall of the protective box (2), the upper end of the screw rod (37) extending out of the top wall of the protective box (2) is fixedly connected with a handle, the lower part of the screw rod (37) is threadedly connected in the screw hole of the internally-threaded seat, the internally-threaded seat is slidably connected with two racks (34) on the bottom surface of the limiting frame (36), the bottom surface of the limiting frame (36) is provided with a sliding rail block for the sliding connection of the rack (34), the two racks (34) are respectively engaged with the external gears of the two clutch blocks (35), the ends of the two racks (34) away from the clutch blocks (35) are respectively engaged with the two long-toothed gears (33); the electric control device (4) comprises two synchronous rings (47), the two synchronous rings (47) are fixedly connected with the top surfaces of two driven bevel gears (45) respectively, the top surfaces of the two synchronous rings (47) are provided with connecting grooves respectively, the bottom surfaces of the two clutch blocks (35) are connected with connecting blocks respectively, and the connecting blocks of the bottom surfaces of the two clutch blocks (35) are respectively engaged with the connecting grooves of the top surfaces of the two synchronous rings (47).

4. The control valve for controlling the air volume of a thermal power unit according to claim 3, characterized in that: The hand control device (3) comprises a limiting rod (38), and the top end of the limiting rod (38) is fixedly connected with the inner top wall of the protective box (2); the electric control device (4) comprises a positioning rod (48), and the bottom surface of the positioning rod (48) is fixedly connected with the top surface of the temperature insulation plate (41); the vertical bar of the T-shaped support of the limiting frame (36) is provided with two limiting holes (39), the two limiting holes (39) are respectively arranged on the two sides of the internally-threaded seat, and the limiting rod (38) and the positioning rod (48) are respectively slidably connected in the two limiting holes (39).

5. The control valve for controlling the air volume of a thermal power unit according to any one of claims 2-4, characterized in that: The two hand control hinges (32) are parallel, the two electric control hinges (46) are parallel, and the two hand control hinges (32) and the two electric control hinges (46) are parallel.

6. The control valve for controlling the air volume of a thermal power unit according to claim 3, characterized in that: The external gear part on the upper part of the clutch block (35) and the gear modulus, gear tooth number, gear pressure angle and gear diameter of the long-toothed gear (33) are all the same, and the external gear part on the upper part of the clutch block (35) and the long-toothed gear (33) are gears of the same specification.

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