CN210176920U

CN210176920U - Crawler-type heater

Info

Publication number: CN210176920U
Application number: CN201920935804.9U
Authority: CN
Inventors: Shibin Zhao; 赵世斌; Hongguo Liu; 刘鸿国; Baoqin Yan; 严宝琴
Original assignee: Shenhua (fuzhou) Luoyuan Bay Port Power Co Ltd; Fujian Jinjiang Cogeneration Co Ltd; Shenhua Fujian Energy Co Ltd
Current assignee: Guoneng Lianjiang Gangdian Co ltd; Guoneng Shenfu Jinjiang Thermal Power Co ltd; Shenhua Fujian Energy Co Ltd
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2020-03-24
Anticipated expiration: 2029-06-20

Abstract

The utility model discloses a crawler-type heater, which comprises a plurality of heating blocks connected with each other and at least one mounting block, wherein the at least one mounting block is constructed to replace the heating blocks with corresponding quantity in the plurality of heating blocks and has the same interconnection structure with the heating blocks in the crawler-type heater so as to be connected with the heating blocks; the mounting block is configured to mount a temperature measuring device to measure a temperature of a workpiece heated by the track heater. The utility model discloses a crawler-type heater is from taking the installation piece, can conveniently fix temperature measuring device, can obtain more accurate measuring result when making temperature measuring device be used for measuring the work piece by crawler-type heater heating.

Description

Crawler-type heater

Technical Field

The embodiment of the utility model relates to a heating device, in particular to crawler-type heater.

Background

The crawler-type heater is a common flexible heater, can be attached to a workpiece for heating, is generally formed by connecting heating wires in series with ceramic heating sheets, is provided with a quick plug connector and the like, and is commonly used for pre-welding preheating or post-welding heat treatment (collectively called welding heat treatment) of an industrial pipeline field welding connector in the industries of electric power, chemical engineering and the like.

The field pipeline heat treatment generally needs a heater, a thermocouple, heat preservation cotton, a heat insulation blanket, iron wire binding and the like. The heater is used for heating the pipeline; the thermocouple is used for measuring the temperature of the pipeline; heat insulation blankets, heat insulation cotton and the like are used for covering heaters and pipelines to keep the temperature; the heat insulation iron wire or iron binding belt is used for fixing the heater, the thermocouple, the heat insulation cotton and the like.

The existing pipeline heat treatment mode is generally as follows: thermocouples are arranged on the pipeline at the positions specified by the process specification, such as the positions of a welding seam, a heat affected zone, a base material and the like in the axial direction and the positions of 12 o ' clock, 3 o ' clock, 9 o ' clock and the like in the circumferential direction, and are used for measuring the temperature and providing signal feedback for controlling the temperature of the heater. The commonly used thermocouples are K-type sheathed thermocouples and plain wire thermocouples. The K-shaped armored thermocouple is fixed on the pipeline in a manner of iron wire binding and the like, and the simple wire-shaped thermocouple is used for welding the cathode and the anode of two wire shapes on the pipeline by using an energy storage type welding instrument. After a thermocouple is installed on the surface of the pipeline, the crawler-type heater covers the thermocouple and the surface of the pipeline, then the heater is fixed by an iron wire, and a heat insulation blanket, heat insulation cotton and the like are coated outside the heater. There are 4 layers of structures on the pipeline section: pipes, thermocouples and lead-out wires, heaters, and insulation wool (or heat insulation blankets).

The arrangement of the crawler heater, the thermocouple and the like has the following problems: the thermocouple is bound by iron wires or welded and fixed, and the field operation wastes time and labor; the thermocouple and the outgoing line are arranged in the heater, and the thermocouple and the outgoing line are easily influenced by the gravity of the heater after the heater is coated outside to cause slippage and falling, so that the measurement result is inaccurate; an iron wire for binding the thermocouple is easy to expand due to heating, so that the contact between the measuring end part of the thermocouple and the surface of the pipeline is poor, and the measuring result is inaccurate; in addition, the operator cannot visually recognize the dislocation of the thermocouple from the outside and take corrective measures in time; in addition, according to the arrangement mode of the existing heater and thermocouple, a heat insulation blanket or heat insulation cotton is not generally adopted between the thermocouple and the heater for isolation, so that the heating of the heater on the pipeline is avoided being influenced, the local non-uniformity of a heat treatment temperature field is caused, and the safety of the pipeline is influenced, but on the other hand, the thermocouple measurement result is influenced by the heat of the heater and is inaccurate due to the fact that the thermocouple is not isolated from the heater. In addition, the existing arrangement mode of the heater and the thermocouple cannot adopt a screw type thermocouple to measure the temperature of the pipeline.

SUMMERY OF THE UTILITY MODEL

One of the objects of the utility model is to provide an integrated crawler-type heater that has temperature acquisition device, solve among the prior art thermocouple installation inconvenient, difficult fixed and measure unsafe problem.

The utility model discloses a crawler-type heater, including a plurality of heating blocks of interconnect, characterized in that, still include at least one installation piece, at least one installation piece is constructed to replace the heating block of corresponding quantity in a plurality of heating blocks to have the same interconnect structure with the heating block in the crawler-type heater in order to interconnect with the heating block; the mounting block is configured to mount a temperature measuring device to measure a temperature of a workpiece heated by the track heater.

According to an exemplary embodiment, in the track heater described above, mounting holes are formed in the mounting block for mounting screw type thermocouples.

According to an exemplary embodiment, the mounting hole includes a large diameter portion and a small diameter portion, the small diameter portion being configured for inserting a screw type thermocouple, and the large diameter portion being configured to mount a nut threadedly connected with the screw type thermocouple.

According to an exemplary embodiment, a thermal insulation means is provided in the mounting hole to thermally insulate the screw type thermocouple and the nut from the mounting block.

According to an exemplary embodiment, after the screw type thermocouple is installed in the installation block, an end portion thereof protrudes out of the installation hole.

According to an exemplary embodiment, the mounting block is made of a thermally conductive material, and mounting holes are formed in the mounting block for mounting a sheathed thermocouple, such as a K-type sheathed thermocouple; the armored thermocouple is in heat conduction connection with the mounting block.

According to an exemplary embodiment, the mounting holes include a first mounting hole and a second mounting hole communicating with each other; the first mounting hole is parallel to the surface of the mounting block to be in contact with a workpiece and used for inserting an armored thermocouple; and the second mounting hole is perpendicular to the first mounting hole and used for mounting a fixing screw.

According to an exemplary embodiment, the mounting block further comprises a heater wire through hole for penetrating the heater wire; and a heat insulation device is arranged on the inner wall of the hot wire through hole so as to thermally insulate the heating wire from the mounting block.

According to an exemplary embodiment, the thermal insulation means is an insulating sleeve.

According to an exemplary embodiment, the surface of the mounting block that is to be in contact with the workpiece protrudes beyond the corresponding surface of the heating block of the crawler heater.

The crawler-type heater of the utility model is provided with the mounting block, which overcomes the defects of the prior binding fixing or welding type fixing thermocouple, can conveniently fix the temperature measuring device, and saves time and labor; and the temperature measuring device can be kept fixed, so that the measuring result of the temperature measuring device is more accurate.

Drawings

In order to illustrate the technical solution of the present invention more clearly, the drawings of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only for the convenience of illustrating the concept of the present invention, and are not intended to limit the present invention.

In the drawings, there is shown a schematic structural diagram according to an embodiment of the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of the various components and the relative sizes therebetween shown in the drawings are merely exemplary, and those skilled in the art may additionally design components having different shapes and sizes according to actual needs.

Fig. 1 is a schematic structural view of a track heater according to an embodiment of the present invention;

fig. 2 is a schematic structural view of an arrangement of a track heater according to an embodiment of the present invention as applied to a heating conduit;

FIG. 3 is a cross-sectional schematic view of the arrangement of the track heater of FIG. 2;

figure 4a is a plan schematic view of a mounting block in a track heater according to one embodiment of the present invention;

FIG. 4b is a cross-sectional structural view of the mounting block of FIG. 4 a;

FIG. 4c is a structural view illustrating a state where the mounting block of FIG. 4a is used to mount a screw type thermocouple;

figure 5a is a schematic perspective view of a mounting block in a track heater according to one embodiment of the present invention; and

fig. 5b is a schematic plan view of the mounting block of fig. 5 a.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. In addition, in the following description, a description of a part of known structures and techniques is omitted.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

The track heater of some exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a track heater according to an embodiment of the present invention. As shown in fig. 1, a track heater 100 according to an exemplary embodiment of the present invention includes a plurality of heating blocks 10 connected to each other. In particular, unlike the existing track heater, the track heater 100 of the present embodiment of the present invention further includes at least one mounting block 20, the at least one mounting block 20 replaces a corresponding number of heating blocks 10 in the track heater 100 and has the same interconnection structure as the heating blocks 10 in the track heater 100, so that the mounting block 20 can be interconnected with the surrounding heating blocks 10 as one heating block, forming an integral track heater. The mounting block 20 is configured to mount a temperature measuring device to measure the temperature of a workpiece, such as a pipe, heated by the track-type heater 100.

In the embodiment of the present invention, the structure of the track heater 100 may adopt various conventional track heater structures, except for the mounting block 20 connected in series into the heating block 10. For example, the track heater 100 includes a power connection cord 30 as a conventional track heater; each heating block 10 in the track heater 100 may be a conventional ceramic heating block; the interconnection structure of each heating block may comprise a male and female mating structure, i.e. one heating block comprises a male plug and the other heating block comprises a female plug groove, so that the heating blocks can be plugged into each other. In addition, each heating block may include heating wire through holes therein, which are communicated with each other. The heating wire through-holes may also serve as an interconnection structure of the respective heating blocks, which are integrally connected when the heating wire is inserted.

In general, the structure of the mounting block 20 should be substantially the same as the structure of the heating block 10 that it replaces. For example, the mounting block 20 may include a male plug for insertion into a socket of the heating block 10 that is docked therewith. In addition, as with the heating block 10, a through hole communicating with a heating wire through hole of the heating block 10 may be included in the mounting block 20 to penetrate the heating wire. Thus, each mounting block 20 can be strung into the heating blocks of the entire track heater 100 as can one heating block 10. The material of the mounting block 20 may be the same as or different from that of the heating block 10. The number and location of the mounting blocks 20 may be selected according to the requirements of the actual measured workpiece. This can be done by the manufacturer of the track heater 100 while it is being manufactured.

The structure of the mounting block 20 is different from that of the heating block 10 in that an additional structure for mounting a temperature measuring device is formed in the mounting block 20. For example, the mounting structure is a suitable mounting hole formed in the mounting block 20 for mounting a thermocouple. Therefore, when the crawler heater 100 of the embodiment of the present invention is used to heat a workpiece, such as a pipeline, it is not necessary to separately arrange a temperature measuring device on the pipeline, so that the process flow is simplified, and the working hours are saved. In addition, the basic structure of the track heater 100 of the present invention is consistent with that of a conventional track heater, and can be directly used instead of the conventional track heater without bringing extra burden to the operator.

Fig. 2 is a schematic structural view of an arrangement of the track heater 100 according to an embodiment of the present invention when added to the heating conduit 40. Fig. 3 is a cross-sectional schematic view of the arrangement of the track heater 100 of fig. 2. As shown in fig. 2 to 3, the track heater 100 is wrapped on the pipeline 40 for heating the pipeline 40, and an insulation layer 60, such as a heat insulation blanket and heat insulation cotton, is disposed outside the track heater 100. The track heater 100 includes a plurality of mounting blocks 20, and a temperature measuring device 50 is connected to each mounting block 20 for measuring the temperature of the pipeline 40. The temperature measuring device 50 may be, for example, a suitable thermocouple such as a K-type sheathed thermocouple or a screw type thermocouple.

The utility model discloses a when crawler-type heater 100 is used for the pipeline heating, only need install temperature measuring device 50 on installation piece 20, then with crawler-type heater 100 cladding on the pipeline to heat preservation 60 such as the cotton is kept warm as heat-proof device in the outside cladding of crawler-type heater 100, can carry out corresponding heating operation to the pipeline. The temperature change of the pipeline can be monitored simultaneously in the heating process so as to adjust the heating temperature timely.

Specifically, the utility model discloses a crawler-type heater 100 is used for the operation process of pipeline heating as follows:

firstly, a temperature acquisition device is installed on a mounting block of the crawler-type heater.

And then, coating the crawler-type heater integrated with the temperature acquisition device on the surface of the pipeline. The width of the pipeline to be heated by heat treatment is checked with the width of the heater and aligned. And checking whether the position of the mounting block on the heater is consistent with the position of the temperature to be measured of the pipeline.

Then, the heater is fixed by adopting an iron wire (or a steel belt), and a plurality of channels can be bound according to the firmness degree and the effect. The common iron wires are bound at the head, the tail and the middle of the heater in the width direction and at the position with the mounting block.

Then, the heater power supply connection wire and the thermocouple lead-out wire are led out to the side surface along the axial direction of the pipeline and are fixed by an iron wire.

Finally, the thermocouple and the temperature acquisition device are covered by a heat insulation blanket and bundled by iron wires. The thickness and the width of the heat-insulating cotton need to meet the requirements of regulations. Thereafter, heating and temperature measurements may be taken.

The above operation sequence is not fixed and can be adjusted according to the needs. For example, mounting the temperature acquisition device on the mounting block of the track heater may be performed after mounting the heater on the pipeline.

By adopting the crawler-type heater of the utility model, the thermocouple is directly arranged in the heater, thus the step of binding iron wires or welding and fixing the thermocouple is saved, and the thermocouple is convenient to install; the thermocouple is arranged in the heater, so that the problems that the thermocouple slides and falls off due to the gravity of the heater when the heater slides and the contact between the measuring end part of the thermocouple and the surface of the pipeline is poor due to the fact that an iron wire for binding the thermocouple expands when heated are avoided; in addition, the thermocouple is fixed in position and can be observed from the outside; an insulating device can be arranged between the thermocouple and the heater without influencing the heating of the pipeline by the heater. Thus, the utility model discloses a caterpillar heater has avoided prior art's a great deal of defect, can make the thermocouple obtain accurate temperature measurement result.

The structure of the mounting block of the present invention will be specifically described below by way of examples.

Fig. 4a shows a schematic plan view of a mounting block 20a that may be used in the track heater 100 of fig. 1, according to an example embodiment of the invention. Fig. 4b is a cross-sectional structural schematic view of the mounting block 20 a. Fig. 4c is a structural view illustrating a state where the mounting block 20a is used to mount the screw-type thermocouple.

As shown in fig. 4a to 4c, a mounting hole 21 for mounting the screw type thermocouple 50a is formed in the mounting block 20 a. The mounting hole 21 opens through the mounting block 20a perpendicularly to the surface of the mounting block 20a that contacts the workpiece (i.e., the spreading surface of the track heater). It is preferable that the mounting hole 21 is located at a central position of the surface of the mounting block 20a, and the mounting hole 21 includes a small diameter portion 21a for inserting the screw type thermocouple 50a and a large diameter portion 21b for mounting a nut (not shown) which is threadably coupled with the screw type thermocouple 50a to fix the screw type thermocouple 50 a. The small diameter portion 21a of the mounting hole 21 may be circular in shape, and the large diameter portion 21b may be hexagonal in shape. As long as the screw type thermocouple 50a can be properly installed, the present invention does not limit the shape of the installation hole.

The mounting block 20a includes a male plug 22 at one end and a female plug groove 23 at the other end. The mounting block 20 further includes a through hole 24 therein for penetrating the heating wire. The through-hole 24 extends parallel to the surface of the heating block 20a contacting the workpiece, and the position of the through-hole 24 should be offset from the mounting hole 21. A through hole 24 may be opened in the mounting block 20a at the position of the plug 22 and the plug groove 23, communicating with the plug groove 23 and passing through the plug 22. Fig. 4a shows two through holes 24 at both side ends of the mounting block 20 a. The heating block 10 to which the mounting block 20a is attached may have the same structure as the mounting block 20a, except that there are no mounting holes, thereby facilitating the stringing of the mounting block 20a into the heating block 10 to form an integral track heater.

In this embodiment, the mounting block 20a may be of the same ceramic material as the heating block 10 in the track heater 100. In this case, in order to obtain more accurate measurement results, a heat insulation means 25, such as heat insulation cotton, for thermally insulating the screw type thermocouple 50a and the nut from the mounting block 20a may be optionally provided in the mounting hole 21. Therefore, the measuring result of the thermocouple is not influenced by the heat of the mounting block and the surrounding heating block, and the measuring result is more accurate.

According to some embodiments, it is preferable that the mounting hole 21 is sized such that the measuring end portion thereof protrudes outside the mounting hole 21 after the screw-type thermocouple 50a is mounted in the mounting block 20. In this way, when the crawler heater 100 is wrapped around the outside of the pipe, the measuring end of the screw thermocouple 50a can more reliably contact the pipe, so that accurate measurement results are easily obtained. In addition, the surface of the mounting block 20 contacting the pipe may be provided with a concave surface to facilitate close contact with the pipe, making it easier to obtain a measurement result by the screw type thermocouple 50 a.

When the track heater 100 with the mounting block 20a of the present embodiment is used to heat a pipeline, the operation is as follows:

firstly, a screw type thermocouple is inserted into a central round hole of a mounting block and is firmly fixed by a nut, and the end of the screw type thermocouple generally slightly protrudes out and is slightly higher than the surface of a heater by 1-2mm, so that the end of the thermocouple is in closer contact with the surface of a pipeline.

And then, covering the surface of the pipeline to be heat-treated with the side of the crawler-type heater, which is provided with the thermocouple end head, facing the pipeline to be heat-treated. The width of the pipe to be heated by heat treatment is checked against the width of the heater and aligned. And checking whether the position of the mounting block on the heater is consistent with the position of the temperature to be measured of the pipeline.

The thermocouple connections were then checked and the thermocouple was insulated from the heating block by sheathing it with a heat insulating blanket. And leading out a thermocouple connecting wire along the axial direction of the pipeline and fixing the thermocouple connecting wire by using an iron wire.

Then, the heater power connection wire is led out to the side along the axial direction of the pipeline and fixed by an iron wire.

And finally, coating the heater and the thermocouple with heat preservation cotton, and bundling with iron wires. The thickness and the width of the heat-insulating cotton need to meet the requirements of regulations.

Then, the heater and the thermocouple can be started to respectively carry out pipeline heating and temperature measurement.

Fig. 5a is a schematic perspective view of a mounting block 20b that may be used in the track heater 100 of fig. 1 according to another embodiment of the present invention. Fig. 5b is a schematic plan view of the mounting block 20 b. In this embodiment, the mounting block 20b is used to mount a sheathed thermocouple. As shown in fig. 5a and 5b, the mounting block 20b is formed substantially in a rectangular parallelepiped structure. The mounting block 20b comprises a first mounting hole 211 and a second mounting hole 212 which are communicated with each other to form a mounting hole 21 and are used for mounting the K-type armored thermocouple. The K-type sheathed thermocouple is in thermally conductive connection with the mounting block 20 b. In this case, the mounting block 20b is made of a heat conductive material as a heat collecting block, and the thermocouple measures the temperature of the pipe through the mounting block 20 b.

Specifically, as shown in fig. 5a and 5b, the first mounting hole 211 is parallel to the upper surface 32 and the lower surface 31 of the mounting block 21, the lower surface 31 is a surface to be in contact with a workpiece for heat transfer, and the first mounting hole 211 is used for inserting a K-type sheathed thermocouple (not shown). The first mounting hole 211 is a blind hole having an open end on one end surface 33 of the mounting block 20b and a closed end near the other end surface 34 opposite to the surface on which the open end is located, thereby forming a deep hole for stably inserting the thermocouple. The second mounting hole 212 is substantially perpendicular to the first mounting hole 211 and opens on the upper surface 32 of the mounting block 20b, and preferably the second mounting hole 212 is located at the center of the upper surface 32. The second mounting hole 212 communicates with the first mounting hole 211 for mounting a screw 28 to fix the K-type sheathed thermocouple inserted into the first mounting hole 211. In addition, a first mounting hole 211 may extend adjacent to the upper surface 32 to facilitate screwing of a thermocouple therein.

In this embodiment, both side ends of the mounting block 20b further include heater wire through holes 24 for penetrating a heater wire (not shown). The first mounting hole 211 is located approximately at the center of the mounting block 20b in the direction parallel to the upper surface 32 and the lower surface 31 and is parallel to the filament through hole 24. The heater through hole 24 is offset from the mounting hole 21 (including the first mounting hole 211 and the second mounting hole 212). Preferably, two through holes 24 are provided at both end sides of the mounting block 20b, respectively, and the first mounting hole 211 is provided at a middle position between the two through holes 24.

In order to prevent heat of the heater wire from being transferred to the mounting block, causing inaccurate measurement results, a heat insulating means may be provided on the inner wall of the heater wire through hole 24 to thermally insulate the heater wire from the mounting block 20 b. The insulation means may comprise an insulation sleeve 29, such as a ceramic insulation sleeve. Optionally, an insulating material such as a heat insulating blanket 27 may be wrapped around the insulating sleeve 29 to further insulate the heat generated by the heating wires.

Further, the lower surface of the mounting block 20b, i.e., the surface of the mounting block that will contact the workpiece, preferably protrudes above the corresponding lower surface of the heating block 10 of the track-type heater 100. In this way, when the crawler heater 100 is wrapped around the outside of the pipe, the mounting block 20b can more reliably contact the pipe to obtain the same temperature as the pipe, so that the thermocouple can easily obtain an accurate measurement result. In addition, the surface of the mounting block 20 contacting the pipe may be provided with a concave surface so as to closely contact the pipe, so that the thermocouple obtains an accurate measurement result.

When the track heater 100 with the mounting block 20b of the present embodiment is used to heat a pipeline, the operation is as follows:

firstly, the side of the crawler-type heater, which is not exposed to the mounting hole or has a concave surface, is opposite to the pipeline to be heated and treated, and the surface of the pipeline to be heated and treated is covered. The width of the pipe to be heated by the heat treatment is checked and aligned with the width of the heater. And checking whether the position of the mounting block on the heater is consistent with the position of the temperature to be measured of the pipeline.

And then, inserting the end part of the K-shaped armored thermocouple into the central deep hole on the side surface of the mounting block, inserting the end part to the bottom, and screwing the fixing screw to fix the end part firmly.

Then, the thermocouple connection was checked, and the thermocouple connection wire was led out to the side of the heater along the axial direction of the pipe and fixed with a wire.

And finally, coating the heat-preservation cotton on a heat treatment heater, and bundling by using iron wires. The thickness and the width of the heat-insulating cotton need to meet the requirements of regulations.

Thereafter, the heater and thermocouple may be turned on for tube heating and temperature measurement, respectively.

The utility model discloses crawler-type heater of each embodiment has following advantage:

1) the position can be measured according to the pipeline needs, the installation block for fixing the thermocouple is directly connected in series with the unfolded plane of the crawler-type heater, and the installation block and the heating block of the crawler-type heater form a whole.

2) The heat treatment process can keep close contact with the surface of the pipeline, and the measurement is accurate and reliable.

3) The problem of measurement reliability caused by the traditional installation mode of the K-type thermocouple and the wire-type thermocouple is solved.

4) The thermocouple is simple and convenient to install, and the installation quality is reliable and visible.

Although the above-described embodiments of the present invention have exemplified the screw thermocouple and the armored thermocouple as the temperature measuring device, it is obvious that the concept of the present invention of stringing the thermocouple installation block in the crawler heater is also applicable to other types of temperature measuring devices, and the same technical effects are obtained.

Therefore, the above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A crawler-type heater comprises a plurality of heating blocks which are connected with each other, and is characterized in that,

further comprising at least one mounting block configured to replace a corresponding number of the plurality of heating blocks and having the same interconnection structure as the heating blocks in the track heater to interconnect with the heating blocks;

the mounting block is configured to mount a temperature measuring device to measure a temperature of a workpiece heated by the track heater.

2. The track heater of claim 1, wherein mounting holes are formed in the mounting block for mounting screw thermocouples.

3. The track heater of claim 2, wherein the mounting holes include a large diameter portion and a small diameter portion, the small diameter portion being for insertion of a screw thermocouple, the large diameter portion being for mounting a nut that is threaded with the screw thermocouple.

4. The track heater of claim 3, wherein thermal insulation means are provided in the mounting holes to thermally insulate the screw thermocouples and the nuts from the mounting blocks.

5. The track heater according to any one of claims 2 to 4, wherein the end of the screw thermocouple protrudes out of the mounting hole after being mounted in the mounting block.

6. The track heater of claim 1, wherein the mounting block is made of a thermally conductive material and,

and a mounting hole is formed in the mounting block and used for mounting an armored thermocouple, and the armored thermocouple is in heat conduction connection with the mounting block.

7. The track heater of claim 6, wherein the mounting holes include a first mounting hole and a second mounting hole in communication with each other;

the first mounting hole is parallel to the surface of the mounting block to be in contact with a workpiece and used for inserting an armored thermocouple; and is

The second mounting hole is perpendicular to the first mounting hole and used for mounting a fixing screw.

8. The track heater of claim 6, wherein the mounting block further comprises a heater wire through hole for passing a heater wire therethrough;

and a heat insulation device is arranged on the inner wall of the hot wire through hole so as to thermally insulate the heating wire from the mounting block.

9. The track heater of claim 8, wherein the thermal insulation means comprises an insulating sleeve.

10. The track heater according to any one of claims 6 to 9, wherein the surface of the mounting block which will contact the workpiece protrudes from a corresponding surface of the heating block of the track heater.