CN116481658A

CN116481658A - Temperature measuring device

Info

Publication number: CN116481658A
Application number: CN202310532001.XA
Authority: CN
Inventors: 王鑫; 董骑
Original assignee: Langfang Thermal Power Plant Of National Energy Group North China Power Co ltd
Current assignee: Langfang Thermal Power Plant Of National Energy Group North China Power Co ltd
Priority date: 2023-05-11
Filing date: 2023-05-11
Publication date: 2023-07-25

Abstract

The present disclosure relates to a temperature measuring device, including temperature sensing element and terminal box, the temperature sensing element with the terminal box passes through the wire electricity to be connected, temperature measuring device still includes a plurality of interval arrangement's protection sleeve pipe, the temperature sensing element is arranged in one of them the protection sleeve pipe is interior, and two adjacent between the protection sleeve pipe through moving part flexible connection, the wire is configured to follow the terminal box stretches out and passes in proper order a plurality of interval arrangement the protection sleeve pipe and moving part to be connected to the temperature sensing element. Therefore, in some difficult operation areas, such as the installation in the vicinity of dead angles of elbows, pipelines and equipment, the temperature measuring device is easier to bend and easy to install, the temperature measuring device can be inserted into the bottom end of a measuring point, heat transfer and heat dissipation losses can be reduced, further temperature measuring errors are reduced, abrasion in the process of installing the temperature measuring device can be reduced, and the reliability of the device is improved.

Description

Temperature measuring device

Technical Field

The disclosure relates to the technical field of power plant temperature measurement, in particular to a temperature measurement device.

Background

In the thermal production process of a power plant, temperature is an important parameter for ensuring safe and economical power generation. The temperature measurement of the power plant is to monitor the temperature parameters of working media (water, gasoline, oil, etc.), so as to ensure that the working media meet the temperature requirements; the other type is to monitor the temperature and temperature difference of metal (high temperature heating surface, generator iron core, coil, etc.), prevent the metal from overheating and generating creep, lose mechanical strength, prevent the generator, transformer bar from dielectric breakdown, influence the economic benefits of the power plant. Therefore, accurately measuring and controlling the temperature is important to ensure economic efficiency of the power plant. In the industry, because of the long temperature measuring sleeve,

when overhauling and technical transformation are carried out, because the temperature measuring point sleeve is installed in the period of the infrastructure, the insertion depth of the steam turbine measuring point is longer, the temperature measuring element can only be manually inserted into the measuring point sleeve forcibly, abrasion is very easy to cause, the original temperature measuring element is difficult to bend, the insertion depth is very easy to limit, the temperature measuring point cannot be inserted into the bottom end of the measuring point in time, inaccurate temperature measurement is caused, misjudgment is caused, and because some temperature measuring points are provided with the tripping protection of the steam turbine, the risk of tripping the steam turbine is caused, and potential safety hazards exist. In addition, the temperature measuring element is not inserted in place, and the appearance is also affected.

Disclosure of Invention

It is an object of the present disclosure to provide a temperature measuring device to at least partially solve the problems existing in the related art.

In order to achieve the above object, the present disclosure provides a temperature measuring device including a temperature sensing element and a junction box, the temperature sensing element and the junction box being electrically connected by a wire, the temperature measuring device further including a plurality of protection sleeves arranged at intervals, the temperature sensing element being disposed in one of the protection sleeves, two adjacent protection sleeves being connected by a movable member being bendable therebetween, the wire being configured to extend from the junction box and sequentially pass through the plurality of protection sleeves arranged at intervals and the movable member so as to be connected to the temperature sensing element.

Optionally, the movable part includes a hinge, the hinge includes a hinge shaft, and a first rotating part and a second rotating part fixedly connected with two adjacent protection sleeves, respectively, and the first rotating part and the second rotating part are rotatably connected to the hinge shaft, respectively.

Optionally, the hinge is configured as a hollow structure, and the ends of the first rotating portion and the second rotating portion are respectively provided with an opening, so that the wire sequentially passes through the first rotating portion and the second rotating portion.

Optionally, the first rotating part and the second rotating part are welded to the adjacent two protection sleeves, respectively.

Optionally, a heat shrink tube is sleeved on the wire in the movable part.

Optionally, a yellow wax tube is sleeved on the wire in the movable part.

Optionally, an insulating porcelain tube is sleeved on the wire in the protective sleeve.

Optionally, the material of the protective sleeve is stainless steel.

Optionally, the ratio of the length of the movable member to the length of the protective sleeve is 1:5.

optionally, the length of the movable part is 0.05 m-0.15 m, the length of the protective sleeve is 0.4 m-0.6 m, and the length of the temperature sensing element is 0.15 m-0.25 m.

Through the technical scheme, the measuring end of the temperature measuring device and the measured medium need to have sufficient heat exchange, the measuring point position needs to be reasonably selected, and the device has sufficient insertion depth when measuring the temperature. The temperature measuring device that this disclosure provided has set up a plurality of protective casings, connect two adjacent protective casings through the moving part to hide the wire in protective casing and moving part, in some operation difficulty areas, for example when near the dead angle installation of elbow, pipeline and equipment, make temperature measuring device crooked more easily, easily installation can insert the measurement station bottom, can reduce heat transfer and heat dissipation loss, and then reduce temperature measurement error, and can reduce the wearing and tearing of installation temperature measuring device in-process, improve the reliability of device.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a schematic diagram of a temperature measurement device provided in an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic view of a hinge in a bent state in a temperature measuring device according to an exemplary embodiment of the present disclosure;

fig. 3 is a schematic view showing a structure of a hinge in an unfolded state in a temperature measuring device according to an exemplary embodiment of the present disclosure.

Description of the reference numerals

1 temperature sensing element 2 wire

3 protective sleeve 4 moving part

41 hinge shaft 42 first rotation part

43 second rotary part 5 insulating porcelain tube

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In the present disclosure, unless otherwise stated, "inner", "outer" are with respect to the own outline of the corresponding parts, and furthermore, the terms "first", "second", etc. are used in the present disclosure to distinguish one element from another, without having order or importance. In the present disclosure, when the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements unless otherwise indicated.

Referring to fig. 1 to 3, the present disclosure provides a temperature measuring device, which may include a temperature sensing element 1 and a junction box, the temperature sensing element 1 and a junction terminal in the junction box being electrically connected through a wire 2, the temperature measuring device may further include a plurality of protection sleeves 3 arranged at intervals, the temperature sensing element 1 being disposed in one of the protection sleeves 3, two adjacent protection sleeves 3 being connected to each other by a movable member 4 in a bendable manner, the wire 2 being configured to extend from the junction box and sequentially pass through the plurality of protection sleeves 3 arranged at intervals and the movable member 4 to be connected to the temperature sensing element 1.

Wherein, referring to fig. 2 and 3, the movable member 4 may include a hinge, which may include a hinge shaft 41, and first and second rotating parts 42 and 43 fixedly connected with the adjacent two protection sleeves 3, respectively, and the first and second rotating parts 42 and 43 are rotatably connected to the hinge shaft 41, respectively. The two adjacent protection sleeves 3 are connected in a bendable manner through the hinge, the flexibility of the hinge is utilized to enable the temperature measuring device to keep a bending state, the problem of temperature measurement and depth insertion is solved, the temperature measuring precision is not affected, the possibility that the temperature sensing element is not inserted in place is thoroughly eliminated, the measured temperature is greatly improved and stabilized, the temperature can be better controlled, and the economic benefit is improved. In the embodiment of the present disclosure, the bending angle of the hinge may reach 90 degrees, and the present disclosure does not limit the bending angle of the hinge.

Further, referring to fig. 2 and 3, the hinge may be configured as a hollow structure, and the ends of the first rotating portion 42 and the second rotating portion 43 are respectively opened with openings for the wires 2 to sequentially pass through the first rotating portion 42 and the second rotating portion 43. Specifically, the end parts of the first rotating part 42 and the second rotating part 43, which are respectively connected with the protection sleeves 3, are respectively provided with an opening through which the wire 2 passes, the end parts of the first rotating part 42, which are respectively connected with the second rotating part 43, are also respectively provided with an opening through which the wire 2 passes, the wire 2 passes through one of the protection sleeves 3 to the first rotating part 42, then passes through the first rotating part 42 to the second rotating part 43, and then passes through the second rotating part 43 to the adjacent protection sleeve 3. When the temperature measuring device is installed, the lead 2 can be connected with the temperature sensing element 1, then the hinge is installed, and finally the protective sleeve 3 is installed.

Specifically, referring to fig. 1, the first rotating part 42 and the second rotating part 43 may be welded to the adjacent two protection sleeves 3, respectively. In other embodiments, the first rotating portion 42 and the second rotating portion 43 may be clamped to the protection sleeve 3, or may be connected by bolts, where the connection manner between the protection sleeve 3 and the first rotating portion 42 and the second rotating portion 43 is not limited, and a stable connection can be achieved, which falls within the protection scope of the present disclosure.

In some embodiments, a heat shrink tube may be sleeved on the wire 2 positioned in the movable member 4. The heat shrinkage tube is a special polyolefin heat shrinkage sleeve, the outer layer of the heat shrinkage sleeve is formed by compounding and processing high-quality soft cross-linked polyolefin materials and inner layer hot melt adhesives, the outer layer material has the characteristics of insulation, corrosion resistance, wear resistance and the like, and the inner layer material has the advantages of low melting point, waterproof sealing, high adhesiveness and the like. The heat shrinkage tube is soft and elastic, can protect the wire 2, and can bend along with the wire 2, so that the wire is prevented from being broken when bending, and the conditions of conduction and threading occur.

In some embodiments, a yellow wax tube may be sleeved on the wire 2 positioned in the movable member 4. The yellow cured tube is also called a polyvinyl chloride glass fiber hose, and is an electric insulation paint tube which is woven by alkali-free glass fibers and is coated with polyethylene resin through plasticization. The yellow wax tube has good softness, elasticity, insulation and chemical resistance. The yellow wax tube is sleeved at the position of the wire 2 needing to be bent, so that the wire 2 can be protected from being worn during bending, and the service life of the temperature measuring device is prolonged.

As an exemplary embodiment of the present disclosure, referring to fig. 1, an insulating porcelain tube 5 may be sleeved on a wire 2 positioned in a protective sleeve 3. The porcelain insulator tube 5 can have good resistance to chemical corrosion, protecting the conductor 2 from environmental attack, damage or wear.

The material of the protective sleeve 3 may be stainless steel. The protective sleeve 3 can be integrally formed by adopting austenitic stainless steel, has excellent corrosion resistance, formability, compatibility and toughness in a wide temperature range, and can well protect the lead wire 2 and the temperature sensing element 1.

Specifically, the ratio of the length of the movable member 4 to the length of the protective sleeve 3 may be 1:5, may be 1: 4. 1:6, this arrangement allows the temperature measuring device to have sufficient flexibility in bending and also ensures the support strength of the movable element 4. It should be noted that the present disclosure does not limit the ratio between the length of the movable member 4 and the length of the protection sleeve 3.

Further, the length of the movable member 4 may be 0.05m to 0.15m, and specifically may be 0.1m; the length of the protective sleeve 3 can be 0.4 m-0.6 m, and can be 0.5m in particular; the length of the temperature sensing element 1 may be 0.15m to 0.25m, and specifically may be 0.2m. In addition, in an embodiment of the present disclosure, the total length of the temperature measuring device may be 3m to 4m, and the temperature measuring device may include 3 to 6 protection sleeves 3. The number of the protective sleeves 3 and the sizes of the components can be adaptively adjusted according to actual requirements.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims

1. The temperature measuring device is characterized by comprising a temperature sensing element and a junction box, wherein the temperature sensing element is electrically connected with the junction box through a wire, the temperature measuring device further comprises a plurality of protection sleeves which are arranged at intervals, the temperature sensing element is arranged in one of the protection sleeves, two adjacent protection sleeves are connected in a bendable manner through a movable piece, and the wire is configured to extend out of the junction box and sequentially pass through the protection sleeves and the movable piece which are arranged at intervals so as to be connected to the temperature sensing element.

2. The temperature measuring device according to claim 1, wherein the movable member includes a hinge including a hinge shaft and first and second rotating portions fixedly connected to the adjacent two protection sleeves, respectively, the first and second rotating portions being rotatably connected to the hinge shaft, respectively.

3. The temperature measuring device of claim 2, wherein the hinge is configured as a hollow structure, and the ends of the first rotating portion and the second rotating portion are respectively provided with an opening for the wire to sequentially pass through the first rotating portion and the second rotating portion.

4. The temperature measurement device of claim 2, wherein the first rotating portion and the second rotating portion are welded to adjacent two of the protective sleeves, respectively.

5. The temperature measuring device of claim 1, wherein the heat shrink tube is sleeved on the wire in the movable member.

6. The temperature measuring device of claim 1, wherein said wire in said movable member is sleeved with a yellow wax tube.

7. The temperature measuring device according to any one of claims 1 to 6, wherein an insulating porcelain tube is fitted over the wire inside the protective sleeve.

8. The temperature measuring device of claim 1, wherein the protective sleeve is made of stainless steel.

9. The temperature measurement device of claim 1, wherein a ratio of a length of the movable member to a length of the protective sleeve is 1:5.

10. the temperature measuring device according to claim 1, wherein the length of the movable member is 0.05m to 0.15m, the length of the protective sleeve is 0.4m to 0.6m, and the length of the temperature sensing element is 0.15m to 0.25m.