CN214608896U

CN214608896U - Automatic calibrating installation of power plant's thermal instrument

Info

Publication number: CN214608896U
Application number: CN202120772130.2U
Authority: CN
Inventors: 邹伟杰
Original assignee: Huaneng Fujian Energy Development Co Ltd Fuzhou Branch
Current assignee: Huaneng Fujian Energy Development Co Ltd Fuzhou Branch
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2021-11-05
Anticipated expiration: 2031-04-15

Abstract

The utility model discloses an automatic calibrating installation of power plant's thermal technology instrument, be the containing box that the opening set up including automatic calibrating installation body and top, the top swing joint of containing box has the apron, and the top fixedly connected with U-shaped handle of apron, automatic calibrating installation body are located the containing box, are equipped with in the containing box with automatic calibrating installation body matched with quick detach mechanism and accomodate lock solid mechanism, quick detach mechanism includes the rectangular block of fixed mounting at automatic calibrating installation body top, and the bottom fixedly connected with fixed block of apron, rectangular block movable sleeve establish on the fixed block, and the right side of rectangular block is seted up flutedly. The utility model relates to a rationally, be convenient for accomodate automatic calibrating installation body and fix in the containing box, conveniently carry the transportation, can reduce the transportation and carry the in-process and bump the damage risk that causes because of the mistake, and can take off automatic calibrating installation body dismouting fast, make things convenient for the maintenance operation in later stage, satisfy the user demand.

Description

Automatic calibrating installation of power plant's thermal instrument

Technical Field

The utility model relates to an automatic verification equipment technical field especially relates to an automatic calibrating installation of thermal technology instrument of power plant.

Background

The thermal instrument of power plant mainly includes: manometer, pressure transmitter, differential pressure transmitter, pressure check gauge, thermal engineering signal check gauge, thermometer on the spot, thermal resistance and thermocouple etc. when its each instrument was used in production, need carry out automatic examination to data such as thermal engineering instrument accuracy with the automatic calibrating installation of power plant thermal engineering instrument, nevertheless along with the development of scientific and technological automatic calibrating installation of power plant thermal engineering instrument is more and more, and is more and more high to the automatic calibrating installation demand of power plant thermal engineering instrument, through the retrieval, application number: 201921830386.3 discloses an automatic verification device for thermal instruments in power plants, which comprises an antiskid block, a display, an input data interface, a control panel, a paper box and an ink box rotating head, wherein the front side of the automatic verification device comprises the input data interface, the display and the control panel, the automatic verification device also comprises a processor module, a multi-way switch, a sampling meter, a printing module and a remote communication module, the input data interface is connected with the internal multi-way switch, the processor module is respectively linked with the sampling meter, the printing module, the remote communication module and the display, and the paper box is communicated with the printing module;

the automatic calibrating installation of power plant's thermal technology instrument in the above-mentioned patent can realize the automatic examination to thermal technology instrument, but it still has some not enoughly, and it is not convenient for accomodate the protection and fix automatic calibrating installation after the use, and at the in-process of transportation and carrying, because of the mistake bumps the damage risk that causes great, can not satisfy the user demand, therefore we have proposed an automatic calibrating installation of power plant's thermal technology instrument and have been used for solving above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing an automatic calibrating device for thermal instruments of a power plant.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an automatic calibrating device for a thermal instrument of a power plant comprises an automatic calibrating device body and a containing box with an opening at the top, wherein the top of the containing box is movably contacted with a cover plate, the top of the cover plate is fixedly connected with a U-shaped handle, the automatic calibrating device body is positioned in the containing box, a quick-release mechanism and a containing locking mechanism which are matched with the automatic calibrating device body are arranged in the containing box, the quick-release mechanism comprises a rectangular block fixedly arranged at the top of the automatic calibrating device body, the bottom of the cover plate is fixedly connected with a fixed block, the rectangular block is movably sleeved on the fixed block, the right side of the rectangular block is provided with a groove, the right side of the fixed block is provided with a clamping groove, a first clamping block is movably clamped in the clamping groove, the right side of the first clamping block penetrates through the groove to extend to the right side of the rectangular block and is fixedly connected with a pull ring, and a first spring is fixedly connected between the left side of the pull ring and the left inner wall of the groove, the first spring is movably sleeved on the first clamping block;

the storage locking mechanism comprises two rectangular tubes fixedly arranged on two sides of the bottom of the cover plate, first rectangular grooves are respectively formed in two sides of the top of the storage box, the bottom ends of the rectangular tubes extend into the corresponding first rectangular grooves, first rectangular holes are formed in one side of the cover plate, winding shafts are rotatably arranged on the inner walls of the tops of the first rectangular holes, the top ends of the winding shafts extend into the U-shaped handles and are fixedly connected with knobs, flexible steel ropes are respectively fixedly connected to two sides of the winding shafts, two clamping holes are respectively formed in the inner walls of two sides of the storage box and are communicated with the corresponding first rectangular grooves, second clamping blocks are movably clamped in the two clamping holes below the four clamping holes, one sides, far away from each other, of the two second clamping blocks respectively extend into the corresponding rectangular tubes and are fixedly connected with moving blocks, positioning rods are fixedly connected between the inner walls of two sides of the rectangular tubes, and are slidably sleeved on the corresponding positioning rods, one side that two movable blocks kept away from each other respectively with two rectangular tubes fixedly connected with second spring between the one side inner wall of keeping away from each other, second spring movable sleeve establishes on the locating lever that corresponds, rotate between the front side inner wall of rectangular tube and the rear side inner wall and install first fixed pulley, rotate between the front side inner wall of first rectangular hole and the rear side inner wall and install two second fixed pulleys, the one end of flexible steel cable is walked around the top of the second fixed pulley that corresponds and the bottom of first fixed pulley and is kept away from one side fixed connection of second fixture block with the movable block.

Preferably, a first circular hole is formed in the inner wall of the top of the first rectangular hole, a first bearing is fixedly sleeved in the first circular hole, and the inner side of an inner ring of the first bearing is fixedly connected with the outer side of the winding shaft.

Preferably, a limiting hole is formed in the inner wall, away from each other, of one side of each first rectangular groove, a limiting block is fixedly connected to the bottom of one side of each rectangular pipe, away from each other, the limiting blocks are connected with the corresponding limiting holes in a sliding mode, and the distance between the tops of the limiting blocks and the top inner walls of the corresponding limiting holes is the same as the distance between the tops of the second clamping blocks and the top inner walls of the clamping holes above the second clamping blocks.

Preferably, a second rectangular hole is formed in one side of the moving block, and the inner wall of the second rectangular hole is in sliding connection with the outer side of the corresponding positioning rod.

Preferably, a third rectangular hole is formed in the inner wall of one side, close to each other, of each rectangular pipe, and the inner wall of the third rectangular hole is connected with the outer side of the corresponding second clamping block in a sliding mode.

Preferably, a second rectangular groove is formed in the top of the rectangular block, the inner wall of the second rectangular groove is in movable contact with the outer side of the fixed block, a fourth rectangular hole communicated with the groove is formed in the inner wall of the right side of the second rectangular groove, and the inner wall of the fourth rectangular hole is in movable contact with the outer side of the first clamping block.

Preferably, two through holes are formed in the inner wall of the bottom of the first rectangular hole, and the flexible steel rope is located in the corresponding through hole and is not in contact with the inner wall of the through hole.

Preferably, equal fixedly connected with second bearing on the front side inner wall of rectangular pipe and the rear side inner wall, the inner circle endotheca that is located two second bearings in same rectangular pipe is fixed the cover and is equipped with same round pin axle, and the front side of first fixed pulley is equipped with the second circular port, the inner wall of second circular port and the outside fixed connection of the round pin axle that corresponds.

Compared with the prior art, the beneficial effects of the utility model are that:

when the automatic verification device body is moved for use, the forward rotating knob drives the winding shaft to rotate to wind the two flexible steel ropes, so that the flexible steel ropes pull the corresponding moving blocks to slide on the positioning rods and compress the second spring, the moving blocks drive the corresponding second clamping blocks to move out of the clamping holes clamped with the second clamping blocks, then the knob is pulled upwards to drive the cover plate to move upwards through the first bearing and the winding shaft, the cover plate drives the two rectangular tubes to respectively slide upwards in the corresponding first rectangular grooves, and the cover plate further drives the automatic verification device body to move out of the storage box through the fixing block, the first clamping block and the rectangular blocks, the rectangular pipe drives the corresponding limiting block to slide upwards in the limiting hole until the limiting block is contacted with the inner wall of the top of the limiting hole, then the reverse knob drives the winding shaft to release the two flexible steel ropes, at the moment, the elasticity of the second spring drives the second clamping block to move into the clamping hole at the upper part through the corresponding moving block, so that the automatic calibrating device body is fixed above the containing box, after the automatic calibrating device is used, the knob is rotated forwards again, the second clamping block is moved out of the clamping hole clamped with the second clamping block again, then the knob is moved downwards to drive the automatic calibrating device body to move into the containing box through the winding shaft, the first bearing, the cover plate, the fixing block, the first clamping block and the rectangular block in sequence, the knob is rotated reversely, the second clamping block is clamped with the corresponding clamping hole positioned below the second clamping block, so that the automatic calibrating device body is fixed in the containing box, and the whole device can be moved by the hand-held U-shaped handle;

when taking off the automatic calibrating installation body, take out the automatic calibrating installation body from the containing box once more, pull the pull ring right next and stretch first spring and drive first fixture block and shift out from the draw-in groove right next, remove the rectangular block downwards next and take off the automatic calibrating installation body.

The utility model relates to a rationally, be convenient for accomodate automatic calibrating installation body and fix in the containing box, conveniently carry the transportation, can reduce the transportation and carry the in-process and bump the damage risk that causes because of the mistake, and can take off automatic calibrating installation body dismouting fast, make things convenient for the maintenance operation in later stage, satisfy the user demand.

Drawings

Fig. 1 is a schematic structural diagram of an automatic calibrating apparatus for thermal instruments in a power plant according to the present invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

fig. 3 is an enlarged schematic view of a portion a in fig. 2.

In the figure: 100 automatic calibrating installation body, 1 containing box, 2 apron, 3 rectangular blocks, 4 fixed blocks, 5 first fixture blocks, 6 first springs, 7 pull rings, 8 first springs, 9 spool, 10 rectangular tubes, 11 flexible steel cable, 12 calorie of holes, 13 first rectangular channels, 14 second fixture blocks, 15 movable blocks, 16 locating levers, 17 second springs, 18U-shaped handle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, an automatic calibrating device for thermal instruments in a power plant comprises an automatic calibrating device body 100 and a containing box 1 with an opening at the top, a cover plate 2 is movably contacted at the top of the containing box 1, a U-shaped handle 18 is fixedly connected at the top of the cover plate 2, the automatic calibrating device body 100 is positioned in the containing box 1, a quick-release mechanism and a containing locking mechanism which are matched with the automatic calibrating device body 100 are arranged in the containing box 1, the quick-release mechanism comprises a rectangular block 3 fixedly installed at the top of the automatic calibrating device body 100, a fixed block 4 is fixedly connected at the bottom of the cover plate 2, the rectangular block 3 is movably sleeved on the fixed block 4, a groove is formed in the right side of the rectangular block 3, a clamping groove is formed in the right side of the fixed block 4, a first clamping block 5 is movably clamped in the clamping groove, the right side of the first clamping block 5 extends to the right side of the rectangular block 3 through the groove and is fixedly connected with a pull ring 7, a first spring 6 is fixedly connected between the left side of the pull ring 7 and the inner wall of the left side of the groove, and the first spring 6 is movably sleeved on the first clamping block 5;

the storage locking mechanism comprises two rectangular tubes 10 fixedly arranged on two sides of the bottom of a cover plate 2, first rectangular grooves 13 are respectively arranged on two sides of the top of a storage box 1, the bottom ends of the rectangular tubes 10 extend into the corresponding first rectangular grooves 13, a first rectangular hole 8 is arranged on one side of the cover plate 2, a winding shaft 9 is rotatably arranged on the inner wall of the top of the first rectangular hole 8, the top end of the winding shaft 9 extends into a U-shaped handle 18 and is fixedly connected with a knob, flexible steel ropes 11 are respectively fixedly connected with two sides of the winding shaft 9, two clamping holes 12 are respectively arranged on the inner walls of two sides of the storage box 1, the clamping holes 12 are communicated with the corresponding first rectangular grooves 13, second clamping blocks 14 are movably clamped in the two clamping holes 12 positioned below the four clamping holes 12, and one sides of the two second clamping blocks 14, which are far away from each other, respectively extend into the corresponding rectangular tubes 10 and are fixedly connected with moving blocks 15, the positioning rods 16 are fixedly connected between the inner walls of the two sides of the rectangular tubes 10, the moving blocks 15 are slidably sleeved on the corresponding positioning rods 16, one side, away from each other, of each of the two moving blocks 15 is fixedly connected with the second springs 17 between the inner walls of one side, away from each other, of each of the two rectangular tubes 10, the second springs 17 are movably sleeved on the corresponding positioning rods 16, the first fixed pulleys are rotatably arranged between the inner walls of the front side and the rear side of each of the rectangular tubes 10, the two second fixed pulleys are rotatably arranged between the inner walls of the front side and the rear side of each of the first rectangular holes 8, one end of the flexible steel cable 11 bypasses the tops of the corresponding second fixed pulleys and the bottoms of the first fixed pulleys and is fixedly connected with one side, away from the second fixture blocks 14, of the moving blocks 15, the automatic calibrating device body 100 is convenient to store and fix in the containing box 1, is convenient to carry and transport, and can reduce the damage risk caused by mistake in the transport process, and can take off automatic calibrating installation body 100 dismouting fast, make things convenient for the maintenance operation in later stage, satisfy the user demand.

In the utility model, a first circular hole is arranged on the inner wall of the top of a first rectangular hole 8, a first bearing is fixedly sleeved in the first circular hole, the inner side of the inner ring of the first bearing is fixedly connected with the outer side of a winding shaft 9, a limit hole is arranged on the inner wall of one side, which is far away from each other, of two first rectangular grooves 13, a limit block is fixedly connected with the bottom of one side, which is far away from each other, of two rectangular tubes 10, the limit block is connected with the corresponding limit hole in a sliding way, the distance between the top of the limit block and the inner wall of the top of the corresponding limit hole is the same as the distance between the top of a second fixture block 14 and the inner wall of the top of a fixture hole 12 positioned above the limit block, one side of a moving block 15 is provided with a second rectangular hole, the inner wall of the second rectangular hole is connected with the outer side of a corresponding positioning rod 16 in a sliding way, a third rectangular hole is arranged on the inner wall of one side, the inner wall of the third rectangular hole is connected with the outer side of the corresponding second fixture block 14 in a sliding way, the top of the rectangular block 3 is provided with a second rectangular groove, the inner wall of the second rectangular groove is movably contacted with the outer side of the fixed block 4, the right inner wall of the second rectangular groove is provided with a fourth rectangular hole communicated with the groove, the inner wall of the fourth rectangular hole is movably contacted with the outer side of the first fixture block 5, the inner wall of the bottom of the first rectangular hole 8 is provided with two through holes, the flexible steel rope 11 is positioned in the corresponding through hole and is not contacted with the inner wall of the through hole, the inner wall of the front side and the inner wall of the rear side of the rectangular pipe 10 are both fixedly connected with a second bearing, the inner rings of the two second bearings positioned in the same rectangular pipe 10 are fixedly sleeved with the same pin shaft, the front side of the first fixed pulley is provided with a second circular hole, the inner wall of the second circular hole is fixedly connected with the outer side of the corresponding pin shaft, the utility model has reasonable design, and is convenient for accommodating and fixing the automatic calibrating device body 100 in the accommodating box 1, conveniently carry the transportation, can reduce the transportation and carry the in-process because of the mistake damages the risk that bumps the cause, and can take off automatic calibrating installation body 100 dismouting fast, make things convenient for the maintenance operation in later stage, satisfy the user demand.

The working principle is as follows: when the automatic calibrating device body 100 needs to be moved for use, the knob is rotated in the forward direction, the knob drives the spool 9 to rotate, the spool 9 rotates to wind the two flexible steel ropes 11, so that the flexible steel ropes 11 sequentially slide at the bottoms of the corresponding first fixed pulleys and the tops of the second fixed pulleys, the flexible steel ropes 11 pull the corresponding moving blocks 15 to slide on the positioning rods 16, the moving blocks 15 slide in the direction close to the corresponding first fixed pulleys and compress the second springs 17, meanwhile, the moving blocks 15 drive the corresponding second clamping blocks 14 to move out of the clamping holes 12 clamped with the second clamping blocks, further, the fixation of the two rectangular tubes 10 is released, the knob is pulled upwards, the knob drives the cover plate 2 to move upwards sequentially through the first bearings and the spool 9, the cover plate 2 drives the two rectangular tubes 10 to respectively slide upwards in the corresponding first rectangular grooves 13, the cover plate 2 further drives the automatic calibrating device body 100 to move out of the containing box 1 sequentially through the fixing block 4, the first clamping block 5 and the rectangular block 3, the rectangular tube 10 moves upwards and drives the corresponding limiting block to slide upwards in the limiting hole, the distance between the top of the limiting block and the inner wall of the top of the corresponding limiting hole is the same as the distance between the top of the second clamping block 14 and the inner wall of the top of the clamping hole 12 above, therefore, when the top of the limiting block contacts with the inner wall of the top of the corresponding limiting hole, the second clamping block 14 is aligned with the corresponding clamping hole 12 above, the winding shaft 9 is driven by the reverse knob to release the two flexible steel ropes 11, the second spring 17 in a compressed state resets, the elastic force of the second spring 17 drives the corresponding moving block 15 to move, and the moving block 15 drives the corresponding second clamping block 14 to move into the clamping hole 12 above, the second fixture block 14 is clamped with the corresponding upper fixture hole 12, so that the rectangular tube 10 is fixed, and the automatic verification device body 100 is fixed above the containing box 1;

at this time, the automatic verification device body 100 can be normally used, after use, the knob is rotated forward again, the movement process of the knob is the same as that of the forward rotation knob, so that the second fixture block 14 is moved out of the clamping hole 12 clamped with the second fixture block again, then the knob is moved downwards, the knob drives the cover plate 2 to move downwards through the winding shaft 9 and the first bearing, the cover plate 2 sequentially drives the automatic verification device body 100 to move into the containing box 1 through the fixing block 4, the first fixture block 5 and the rectangular block 3, when the bottom of the cover plate 2 is contacted with the top of the containing box 1, the knob is rotated reversely, the movement process of the knob is the reverse to that of the knob, so that the second fixture block 14 is clamped with the corresponding clamping hole 12 positioned below, the automatic verification device body 100 is fixed in the containing box 1, and the whole device can be moved through the U-shaped handle 18 by hand, the automatic calibrating device is convenient to transport and carry, and the damage risk caused by mistaken collision in the transporting and carrying process can be reduced by the way that the automatic calibrating device body 100 is accommodated and fixed in the accommodating box 1;

when needs take off automatic calibrating installation body 100, forward rotation knob and upwards pulling once more, take out automatic calibrating installation body 100 from containing box 1, stimulate pull ring 7 right next and drive first fixture block 5 and shift out from the draw-in groove right, pull ring 7 is stretched first spring 6 when moving right, and then has detached the fixed to rectangular block 3, move down rectangular block 3 next and take off automatic calibrating installation body 100, automatic calibrating installation body 100 after taking off makes things convenient for the maintenance operation in later stage.

In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. An automatic calibrating device for a thermal instrument of a power plant comprises an automatic calibrating device body (100) and a containing box (1) with an opening at the top, and is characterized in that a cover plate (2) is movably contacted at the top of the containing box (1), a U-shaped handle (18) is fixedly connected at the top of the cover plate (2), the automatic calibrating device body (100) is positioned in the containing box (1), a quick-release mechanism and a containing and locking mechanism which are matched with the automatic calibrating device body (100) are arranged in the containing box (1), the quick-release mechanism comprises a rectangular block (3) fixedly arranged at the top of the automatic calibrating device body (100), a fixed block (4) is fixedly connected at the bottom of the cover plate (2), the rectangular block (3) is movably sleeved on the fixed block (4), a groove is formed in the right side of the rectangular block (3), a clamping groove is formed in the right side of the fixed block (4), and a first clamping block (5) is movably clamped in the clamping groove, the right side of the first clamping block (5) penetrates through the groove to extend to the right side of the rectangular block (3) and is fixedly connected with a pull ring (7), a first spring (6) is fixedly connected between the left side of the pull ring (7) and the inner wall of the left side of the groove, and the first spring (6) is movably sleeved on the first clamping block (5);

the storage locking mechanism comprises two rectangular tubes (10) fixedly arranged on two sides of the bottom of a cover plate (2), first rectangular grooves (13) are formed in two sides of the top of a storage box (1), the bottom ends of the rectangular tubes (10) extend into the corresponding first rectangular grooves (13), a first rectangular hole (8) is formed in one side of the cover plate (2), a winding shaft (9) is rotatably arranged on the inner wall of the top of the first rectangular hole (8), the top end of the winding shaft (9) extends into a U-shaped handle (18) and is fixedly connected with a knob, flexible steel ropes (11) are fixedly connected to two sides of the winding shaft (9), two clamping holes (12) are formed in the inner walls of two sides of the storage box (1), the clamping holes (12) are communicated with the corresponding first rectangular grooves (13), second clamping blocks (14) are movably clamped in the two clamping holes (12) positioned below the four clamping holes (12), one side, far away from each other, of each of the two second clamping blocks (14) extends into the corresponding rectangular tube (10) and is fixedly connected with a moving block (15), a positioning rod (16) is fixedly connected between the inner walls of the two sides of the rectangular tube (10), the moving block (15) is sleeved on the corresponding positioning rod (16) in a sliding manner, a second spring (17) is fixedly connected between one side, far away from each other, of each of the two moving blocks (15) and the inner wall of one side, far away from each other, of each of the two rectangular tubes (10), the second spring (17) is movably sleeved on the corresponding positioning rod (16), a first fixed pulley is rotatably installed between the inner wall of the front side and the inner wall of the rear side of each rectangular tube (10), and two second fixed pulleys are rotatably installed between the inner wall of the front side and the inner wall of the rear side of each first rectangular hole (8), one end of the flexible steel rope (11) winds around the top of the corresponding second fixed pulley and the bottom of the corresponding first fixed pulley and is fixedly connected with one side, far away from the second clamping block (14), of the moving block (15).

2. The automatic calibrating device for the power plant thermal instruments according to claim 1, wherein a first circular hole is formed in the inner wall of the top of the first rectangular hole (8), a first bearing is fixedly sleeved in the first circular hole, and the inner side of an inner ring of the first bearing is fixedly connected with the outer side of the winding shaft (9).

3. The automatic calibrating device for the thermal instruments in the power plant according to claim 1, wherein the inner walls of the two first rectangular grooves (13) at the sides far away from each other are provided with limiting holes, the bottoms of the two rectangular tubes (10) at the sides far away from each other are fixedly connected with limiting blocks, the limiting blocks are slidably connected with the corresponding limiting holes, and the distance between the tops of the limiting blocks and the inner walls of the tops of the corresponding limiting holes is the same as the distance between the top of the second clamping block (14) and the inner walls of the tops of the clamping holes (12) above the second clamping block.

4. The automatic calibrating device for the power plant thermal instruments according to claim 1, wherein a second rectangular hole is formed in one side of the moving block (15), and the inner wall of the second rectangular hole is slidably connected with the outer side of the corresponding positioning rod (16).

5. The automatic calibrating device for the power plant thermal instruments according to claim 1, wherein the inner walls of the two rectangular pipes (10) close to each other are provided with third rectangular holes, and the inner walls of the third rectangular holes are slidably connected with the outer sides of the corresponding second clamping blocks (14).

6. The automatic calibrating device for the power plant thermal instruments according to claim 1, characterized in that a second rectangular groove is formed in the top of the rectangular block (3), the inner wall of the second rectangular groove is in movable contact with the outer side of the fixed block (4), a fourth rectangular hole communicated with the groove is formed in the inner wall of the right side of the second rectangular groove, and the inner wall of the fourth rectangular hole is in movable contact with the outer side of the first clamping block (5).

7. The automatic calibrating device for the power plant thermal instruments according to claim 1, wherein two through holes are formed in the inner wall of the bottom of the first rectangular hole (8), and the flexible steel rope (11) is located in the corresponding through hole and is not in contact with the inner wall of the through hole.

8. The automatic calibrating device for the thermal instruments in the power plant according to claim 1, wherein the rectangular tube (10) is fixedly connected with second bearings on the inner walls of the front side and the rear side, the same pin shaft is fixedly sleeved in the inner rings of the two second bearings in the same rectangular tube (10), the second circular hole is formed in the front side of the first fixed pulley, and the inner wall of the second circular hole is fixedly connected with the outer side of the corresponding pin shaft.