Calibrating device for working instrument of thermal power plant

Abstract

The invention relates to the technical field of instrument calibration, and provides a thermal power plant working instrument calibration device, which comprises a box body, the bottom of the box body is fixedly connected with a base, the top of the box body is provided with a placement groove, the middle of the placement groove is fixedly connected with a calibration cup, the inner side of the box body is provided with a constant temperature cavity, and one end of the placement groove is fixedly connected with a thermometer. A heating pipe is fixedly connected to the inner side of the constant-temperature cavity, a hollow cavity is formed in the outer edge of the constant-temperature cavity, a motor is fixedly mounted at the top end of the base, an output shaft of the motor is fixedly connected with a driving shaft, and a stirring assembly which is matched with rotation of the driving shaft to stir a constant-temperature medium is arranged at the top end of the driving shaft; the outer side of the hollow cavity is provided with an air exhaust assembly which is matched with driving of the motor to exhaust air in the hollow cavity. Gas in the hollow cavity is pumped out through the gas pumping assembly, so that the sealing effect of the sealing gasket at the top end of the hollow cavity can be improved, and the heat preservation performance of the hollow cavity can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of instrument calibration, and in particular to a calibration device for working instruments in a thermal power plant. Background Art

[0002] A thermal power plant refers to a thermal power plant that uses steam extraction or exhaust from steam turbines to provide heat to users while generating electricity. The main working principle is to use the hot water generated by the thermal power plant and reheat it for heating. A series of working instruments are needed in the operation of the thermal power plant. For example, temperature meters are used very frequently. Before the working instruments are used, they need to be calibrated to ensure the accuracy of the measurement during use. Therefore, a calibration device is needed to calibrate the instruments.

[0003] After searching, the Chinese patent publication number CN206832382U disclosed "a calibration device for working instruments in a thermal power plant, comprising a shell, a placement slot is arranged in the shell, the placement slot is filled with a constant temperature medium, the constant temperature medium is heated and temperature controlled by a heating device, a calibration cup is placed on the slot of the placement slot, the bottom of the calibration cup is immersed in the constant temperature medium, a circular hole for inserting a thermometer is opened on the slot wall of the placement slot, the thermometer is inserted into the constant temperature medium through the circular hole, an inner insulation door and an outer insulation door are arranged on the top of the shell, the inner insulation door and the outer insulation door are both hinged to the shell, and the hinge points of the inner insulation door and the outer insulation door are respectively located on both sides of the shell."

[0004] However, in the process of implementing relevant technologies, this type of patent has certain technical defects: This type of patent can achieve the effect of heat insulation by setting the vacuum layer and the insulation layer to reduce the heat loss of the constant temperature medium. However, since the vacuum layer is mainly sealed by the inner insulation door, this sealing method is not tight enough, which can easily cause external air to enter the vacuum layer and destroy the vacuum environment, thereby reducing the insulation effect. This type of patent mainly stirs the constant temperature medium through an agitator to improve the fluidity of the constant temperature medium when heating the constant temperature medium. However, the agitator mainly stirs the constant temperature medium horizontally during stirring, so that the constant temperature medium can only flow horizontally, and the flow speed of the constant temperature medium at different depths is low, thereby affecting the heating speed of the constant temperature medium. In view of this, the present invention proposes a calibration device for working instruments of a thermal power plant. Summary of the invention

[0005] The invention provides a calibration device for working instruments of a thermal power plant, which solves the problem in the prior art that the internal sealing of a vacuum layer is insufficient and affects the thermal insulation.

[0006] The technical solution of the present invention is as follows: A calibration device for working instruments in a thermal power plant comprises a box body, a base is fixedly connected to the bottom of the box body, a placement groove is provided on the top of the box body, a calibration cup for placing a calibrated thermometer is fixedly connected to the middle of the placement groove, a constant temperature cavity for storing a constant temperature medium is provided on the inner side of the box body, a thermometer is fixedly connected to one end of the placement groove, a detection end of the thermometer extends into the constant temperature cavity, a heating tube is fixedly connected to the inner side of the constant temperature cavity, a hollow cavity is provided on the outer edge of the constant temperature cavity, a motor is fixedly installed on the top of the base, a drive shaft is fixedly connected to the output shaft of the motor, a stirring component for stirring the constant temperature medium by cooperating with the rotation of the drive shaft is provided on the top of the drive shaft, and an exhaust component for extracting the gas inside the hollow cavity by cooperating with the drive of the motor is provided on the outer side of the hollow cavity.

[0007] Preferably, a sealing gasket is fixedly connected to the top of the hollow cavity, a heat preservation plate is hingedly connected to one end of the top of the box body, and clamping members for clamping the sealing gasket are arranged at the four corners of the inner side of the heat preservation plate.

[0008] Preferably, the clamping member comprises a pressing block, the inner wall of the pressing block is provided with a mounting groove which slidably cooperates with the pressing block, the inner wall of the mounting groove is welded with a spring, and one end of the spring away from the inner wall of the mounting groove is welded to the pressing block.

[0009] Preferably, an observation window is fixedly connected to the insulation board, and the observation window is a transparent glass window.

[0010] Preferably, the constant temperature chamber is fixedly connected to the inner wall of the hollow cavity with a heat preservation layer.

[0011] Preferably, the stirring assembly includes a first stirring impeller, which is fixedly connected to the top end of the driving shaft, a connecting seat is fixedly connected to the middle part of the driving shaft, a plurality of first rotating shafts which are perpendicular to the driving shaft are rotatably connected to the outer side of the connecting seat, a plurality of the first rotating shafts are distributed at equal angles around the connecting seat, a plurality of the first rotating shafts are fixedly connected to one end away from the connecting seat with a second stirring impeller, and a linkage member which drives all the first rotating shafts to rotate by cooperating with the rotation of the driving shaft is provided at the bottom end of the inner side of the constant temperature chamber.

[0012] Preferably, the linkage member includes a fixed seat, the fixed seat is fixedly connected to the bottom end of the inner side of the constant temperature chamber, the top of the fixed seat is fixedly connected to a crown gear, the middle parts of several first rotating shafts are fixedly connected to transmission gears, and several of the transmission gears are meshed with the crown gear.

[0013] Preferably, the vacuum assembly includes a mounting tube, one end of which is fixedly connected to an air outlet pipe, one end of which is communicated with the interior of the hollow cavity, the other end of which is fixedly connected to an exhaust pipe communicated with the interior of the mounting tube, and an air outlet one-way valve is fixedly connected to the exhaust pipe.

[0014] Preferably, the exhaust assembly also includes an air suction impeller, which is rotatably connected to the inner side of the mounting cylinder, the bottom end of the mounting cylinder is rotatably connected to a second rotating shaft that passes through the inner wall of the mounting cylinder, the top end of the second rotating shaft is fixedly connected to a first bevel gear, one side of the air suction impeller is coaxially fixedly connected to a second bevel gear, the second bevel gear is meshed with the first bevel gear, and the bottom end of the second rotating shaft is provided with a transmission assembly that is driven by a motor to drive the second rotating shaft to rotate.

[0015] Preferably, the transmission assembly includes a first pulley, the first pulley is fixedly connected to the output shaft of the motor, the bottom end of the second rotating shaft is fixedly connected to a second pulley, and the second pulley is connected to the first pulley through a belt drive.

[0016] The working principle and beneficial effects of the present invention are: 1. Place the calibrated thermometer into the calibration cup, then energize the heating tube to heat the constant temperature medium inside the constant temperature chamber, and then start the motor to drive the drive shaft to rotate, so that the stirring component stirs the constant temperature medium, which can also speed up the fluidity of the constant temperature medium, so that the constant temperature medium can be heated up quickly. At the same time, the exhaust component extracts the gas inside the hollow cavity, which can improve the sealing effect of the sealing gasket at the top of the hollow cavity, thereby improving the thermal insulation performance of the hollow cavity, and avoiding the heat loss of the constant temperature medium; 2. By starting the motor to drive the driving shaft to rotate, the first stirring impeller rotates horizontally, which makes the first rotating shafts rotate circumferentially around the connecting seat. At the same time, the transmission gear rotates along the crown gear, which makes the first rotating shaft rotate, so that the second stirring impeller rotates synchronously, and the second stirring impeller rotates longitudinally. By coordinating the rotation of the first stirring impeller, the constant temperature medium can be stirred horizontally and longitudinally, which can make the constant temperature medium flow quickly, and then make the constant temperature medium heat up quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 It is a structural schematic diagram of a calibration device for working instruments of a thermal power plant according to the present invention; Figure 2 It is a schematic diagram of the internal structure of the box of the present invention; Figure 3It is a structural schematic diagram of the pressing member of the present invention; Figure 4 It is a schematic structural diagram of the stirring assembly of the present invention; Figure 5 It is a structural schematic diagram of the air extraction component of the present invention; Figure 6 It is a schematic structural diagram of the transmission assembly of the present invention.

[0019] In the figure: 1, base; 2, box; 21, constant temperature chamber; 22, heating tube; 23, motor; 24, drive shaft; 25, stirring assembly; 251, first stirring impeller; 252, connecting seat; 253, first rotating shaft; 254, second stirring impeller; 255, transmission gear; 256, fixed seat; 257, crown gear; 26, hollow cavity; 27, sealing pad; 28, exhaust assembly; 281, exhaust pipe; 282, Mounting cylinder; 283, suction impeller; 284, exhaust pipe; 285, air outlet non-return valve; 286, second rotating shaft; 287, first bevel gear; 288, second bevel gear; 29, transmission assembly; 291, first pulley; 292, second pulley; 3, placement groove; 4, insulation board; 41, observation window; 42, clamping piece; 421, mounting groove; 422, spring; 423, pressing block; 6, calibration cup; 7, thermometer. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figure 1 to Figure 6As shown, this embodiment proposes a calibration device for working instruments in a thermal power plant, comprising a box body 2, a base 1 is fixedly connected to the bottom of the box body 2, a placement groove 3 is provided on the top of the box body 2, a calibration cup 6 for placing a calibrated thermometer is fixedly connected to the middle of the placement groove 3, a constant temperature cavity 21 for storing a constant temperature medium is provided on the inner side of the box body 2, a thermometer 7 is fixedly connected to one end of the placement groove 3, a detection end of the thermometer 7 extends to the inside of the constant temperature cavity 21, a heating tube 22 is fixedly connected to the inner side of the constant temperature cavity 21, a hollow cavity 26 is provided on the outer edge of the constant temperature cavity 21, a sealing gasket 27 is fixedly connected to the top of the hollow cavity 26, and one end of the top of the box body 2 is provided. An insulation board 4 is hingedly connected, and an observation window 41 is fixedly connected to the insulation board 4, and the observation window 41 is a transparent glass window. The constant temperature chamber 21 and the inner wall of the hollow cavity 26 are fixedly connected with an insulation layer, and the four corners on the inner side of the insulation board 4 are provided with clamping parts 42 for compressing the sealing gasket 27. A motor 23 is fixedly installed on the top of the base 1, and the output shaft of the motor 23 is fixedly connected to the driving shaft 24. The top of the driving shaft 24 is provided with a stirring component 25 for stirring the constant temperature medium by cooperating with the rotation of the driving shaft 24, and the outer side of the hollow cavity 26 is provided with an exhaust component 28 for extracting the gas inside the hollow cavity 26 by cooperating with the drive of the motor 23.

[0022] By placing the calibrated thermometer into the calibration cup 6, and then energizing the heating tube 22 to heat the constant temperature medium inside the constant temperature chamber 21, and then starting the motor 23 to drive the driving shaft 24 to rotate, the stirring component 25 stirs the constant temperature medium, and the fluidity of the constant temperature medium can be accelerated, so that the constant temperature medium can be heated quickly. At the same time, the exhaust component 28 extracts the gas inside the hollow cavity 26, which can improve the sealing effect of the sealing gasket 27 at the top of the hollow cavity 2, and then improve the thermal insulation performance of the hollow cavity 26, and avoid the heat loss of the constant temperature medium.

[0023] Furthermore, the pressing member 42 includes a pressing block 423, the inner wall of which is provided with a mounting groove 421 that is slidably matched with the pressing block 423, a spring 422 is welded to the inner wall of the mounting groove 421, and one end of the spring 422 that is away from the inner wall of the mounting groove 421 is welded to the pressing block 423. The box body 2 is sealed by the heat preservation board 4, so that the pressing block 423 contacts the sealing gasket 27, and under the elastic force of the spring 422, the pressing block 423 applies pressure to the sealing gasket 27, thereby further improving the sealing performance of the sealing gasket 27.

[0024] Furthermore, the stirring assembly 25 includes a first stirring impeller 251, which is fixedly connected to the top end of the driving shaft 24, and a connecting seat 252 is fixedly connected to the middle part of the driving shaft 24. The outer side of the connecting seat 252 is rotatably connected to a plurality of first rotating shafts 253 which are perpendicular to the driving shaft 24. The plurality of first rotating shafts 253 are distributed at equal angles around the connecting seat 252, and the ends of the plurality of first rotating shafts 253 away from the connecting seat 252 are fixedly connected to the second stirring impeller 254. A linkage member for driving all the first rotating shafts 253 to rotate by cooperating with the rotation of the driving shaft 24 is provided at the bottom end of the inner side of the constant temperature chamber 21. The linkage member includes a fixed seat 256, and the fixed seat 256 is fixedly connected to the bottom end of the inner side of the constant temperature chamber 21. A crown gear 257 is fixedly connected to the top of the fixed seat 256. The middle parts of the plurality of first rotating shafts 253 are fixedly connected to transmission gears 255, and the plurality of transmission gears 255 are meshed with the crown gear 257.

[0025] By starting the motor 23 to drive the driving shaft 24 to rotate, the first stirring impeller 251 rotates horizontally, which makes the first rotating shafts 253 rotate circumferentially around the connecting seat 252. At the same time, the transmission gear 255 rotates along the crown gear 257, which makes the first rotating shaft 253 rotate, so that the second stirring impeller 254 rotates synchronously, and the second stirring impeller 254 rotates longitudinally. By coordinating the rotation of the first stirring impeller 251, the constant temperature medium can be stirred horizontally and longitudinally, so that the constant temperature medium can flow quickly, and then the constant temperature medium can be heated quickly.

[0026] Furthermore, the exhaust assembly 28 includes a mounting cylinder 282, one end of which is fixedly connected to an air outlet pipe 281, one end of which is communicated with the interior of the hollow cavity 26, the other end of the mounting cylinder 282 is fixedly connected to an exhaust pipe 284 communicated with the interior of the mounting cylinder 282, the exhaust pipe 284 is fixedly connected to an air outlet check valve 285, the inner side of the mounting cylinder 282 is rotatably connected to an air suction impeller 283, the bottom end of the mounting cylinder 282 is rotatably connected to a second rotating shaft 286 that passes through the inner wall of the mounting cylinder 282, the top end of the second rotating shaft 286 is fixedly connected to a first bevel gear 287, one side of the air suction impeller 283 is coaxially fixedly connected to a second bevel gear 288, the second bevel gear 288 is meshed with the first bevel gear 287, and the bottom end of the second rotating shaft 286 is provided with a transmission assembly 29 that is driven by the motor 23 to drive the second rotating shaft 286 to rotate.

[0027] By starting the motor 23, the transmission assembly 29 drives the second rotating shaft 286 to rotate, which causes the first bevel gear 287 to rotate synchronously, and the second bevel gear 288 to rotate synchronously, so that the suction impeller 283 rotates synchronously, so that the pressure inside the mounting tube 282 is reduced, and the air outlet pipe 281 draws the gas inside the hollow cavity 26 out, which can improve the sealing effect of the sealing gasket 27 at the top of the hollow cavity 26, and then improve the thermal insulation performance of the hollow cavity 26, and thus avoid the heat loss of the constant temperature medium.

[0028] Furthermore, the transmission assembly 29 includes a first pulley 291, which is fixedly connected to the output shaft of the motor 23. The bottom end of the second rotating shaft 286 is fixedly connected to a second pulley 292, and the second pulley 292 is connected to the first pulley 291 through a belt drive.

[0029] Working principle: by placing the calibrated thermometer into the calibration cup 6, and then energizing the heating tube 22 to heat the constant temperature medium inside the constant temperature chamber 21, and then starting the motor 23 to drive the driving shaft 24 to rotate, so that the first stirring impeller 251 rotates horizontally, which makes the first rotating shafts 253 rotate circumferentially around the connecting seat 252, and at the same time the transmission gear 255 rotates along the crown gear 257, so that the first rotating shaft 253 rotates, so that the second stirring impeller 254 rotates synchronously, and the second stirring impeller 254 rotates longitudinally, and the constant temperature medium can be stirred horizontally and longitudinally by coordinating the rotation of the first stirring impeller 251, so that the constant temperature medium can flow quickly, and then the constant temperature medium can be heated up quickly, and the calibrated thermometer is compared with the value on the thermometer 7 for calibration.

[0030] When the motor 23 is started, it can drive the first pulley 291 to rotate synchronously, which also makes the second pulley 292 rotate synchronously, and the second rotating shaft 286 rotate synchronously, which makes the first bevel gear 287 rotate synchronously, and also makes the second bevel gear 288 rotate synchronously, so that the suction impeller 283 rotates synchronously, and the pressure inside the mounting tube 282 is reduced, so that the air outlet pipe 281 draws the gas inside the hollow cavity 26 out, which can improve the sealing effect of the sealing gasket 27 at the top of the hollow cavity 2, and then improve the thermal insulation performance of the hollow cavity 26, and also can avoid the heat loss of the constant temperature medium.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A calibration device for working instruments in a thermal power plant, comprising a box (2), the bottom of the box (2) being fixedly connected to a base (1), the top of the box (2) being provided with a placement groove (3), the middle of the placement groove (3) being fixedly connected to a calibration cup (6) for placing a calibrated thermometer, the inner side of the box (2) being provided with a constant temperature cavity (21) for storing a constant temperature medium, one end of the placement groove (3) being fixedly connected to a thermometer (7), the detection end of the thermometer (7) extending into the interior of the constant temperature cavity (21), the inner side of the constant temperature cavity (21) being fixedly connected to a heating tube (22), characterized in that: The outer edge of the constant temperature chamber (21) is provided with a hollow cavity (26); a motor (23) is fixedly mounted on the top of the base (1); an output shaft of the motor (23) is fixedly connected to a drive shaft (24); a stirring assembly (25) is provided at the top of the drive shaft (24) for stirring the constant temperature medium by cooperating with the rotation of the drive shaft (24); and an exhaust assembly (28) is provided on the outer side of the hollow cavity (26) for exhausting gas inside the hollow cavity (26) by cooperating with the drive of the motor (23).

2. The calibration device for working instruments of a thermal power plant according to claim 1, characterized in that: A sealing gasket (27) is fixedly connected to the top of the hollow cavity (26), a heat preservation plate (4) is hingedly connected to one end of the top of the box body (2), and compression members (42) for compressing the sealing gasket (27) are arranged at four corners inside the heat preservation plate (4).

3. The calibration device for working instruments of a thermal power plant according to claim 2, characterized in that: The pressing member (42) comprises a pressing block (423), the inner wall of the pressing block (423) being provided with a mounting groove (421) slidably matched with the pressing block (423), the inner wall of the mounting groove (421) being welded with a spring (422), and one end of the spring (422) away from the inner wall of the mounting groove (421) being welded to the pressing block (423).

4. The calibration device for working instruments of a thermal power plant according to claim 2, characterized in that: An observation window (41) is fixedly connected to the thermal insulation board (4), and the observation window (41) is a transparent glass window.

5. The calibration device for working instruments of a thermal power plant according to claim 1, characterized in that: The constant temperature chamber (21) and the inner wall of the hollow chamber (26) are fixedly connected with a heat-insulating layer.

6. The calibration device for working instruments of a thermal power plant according to claim 1, characterized in that: The stirring assembly (25) comprises a first stirring impeller (251), the first stirring impeller (251) being fixedly connected to the top end of the driving shaft (24), a connecting seat (252) being fixedly connected to the middle part of the driving shaft (24), a plurality of first rotating shafts (253) being rotatably connected to the outer side of the connecting seat (252) and being arranged perpendicularly to the driving shaft (24), a plurality of the first rotating shafts (253) being arranged around the connecting seat (252) at equal angles, a plurality of the first rotating shafts (253) being fixedly connected to one end away from the connecting seat (252) of each of the second stirring impellers (254), and a linkage member for driving all the first rotating shafts (253) to rotate by cooperating with the rotation of the driving shaft (24) is arranged at the bottom end of the inner side of the constant temperature chamber (21).

7. A calibration device for working instruments in a thermal power plant according to claim 6, characterized in that: The linkage member comprises a fixed seat (256), the fixed seat (256) being fixedly connected to the bottom end of the inner side of the constant temperature chamber (21), the top end of the fixed seat (256) being fixedly connected to a crown gear (257), the middle parts of the plurality of first rotating shafts (253) being fixedly connected to a transmission gear (255), and the plurality of transmission gears (255) being meshed with the crown gear (257).

8. The calibration device for working instruments of a thermal power plant according to claim 7, characterized in that: The air extraction assembly (28) comprises a mounting cylinder (282), one end of the mounting cylinder (282) being fixedly connected to an air outlet pipe (281), one end of the air outlet pipe (281) being communicated with the interior of the hollow cavity (26), the other end of the mounting cylinder (282) being fixedly connected to an exhaust pipe (284) being communicated with the interior of the mounting cylinder (282), and an exhaust one-way valve (285) being fixedly connected to the exhaust pipe (284).

9. A calibration device for working instruments in a thermal power plant according to claim 8, characterized in that: The exhaust assembly (28) further comprises an air suction impeller (283), wherein the air suction impeller (283) is rotatably connected to the inner side of the mounting tube (282), and the bottom end of the mounting tube (282) is rotatably connected to a second rotating shaft (286) penetrating the inner wall of the mounting tube (282), and the top end of the second rotating shaft (286) is fixedly connected to a first bevel gear (287), and one side of the air suction impeller (283) is coaxially fixedly connected to a second bevel gear (288), and the second bevel gear (288) is meshed with the first bevel gear (287), and the bottom end of the second rotating shaft (286) is provided with a transmission assembly (29) which is driven by a motor (23) to drive the second rotating shaft (286) to rotate.

10. The calibration device for working instruments of a thermal power plant according to claim 9, characterized in that: The transmission assembly (29) comprises a first pulley (291), the first pulley (291) being fixedly connected to the output shaft of the motor (23), the bottom end of the second rotating shaft (286) being fixedly connected to a second pulley (292), the second pulley (292) being connected to the first pulley (291) via a belt drive.

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