阅读说明：本技术 一种管夹式温度变送器及其介质温度检测方法 (Pipe clamp type temperature transmitter and medium temperature detection method thereof ) 是由 谯兵 王建平 李玉东 孟亮 姬康 杨磊 何垠均 熊龙 梁伟成 阙亮 于 2021-05-21 设计创作，主要内容包括：本发明提供一种管夹式温度变送器及其介质温度检测方法,管夹式温度变送器包括：卡箍单元,所述卡箍单元与待测管壁温度的管道相匹配；安装座单元,所述安装座单元设置在所述卡箍单元上；测温单元,所述测温单元贯穿所述安装座单元和所述卡箍单元,并与所述管道相作用。可通过调整卡箍单元与管道的位置,采集所需测量区域的待测管壁温度并获取流量介质的温度；通过安装座单元隔离外界环境条件对测温单元的影响,阻断气温变化对测温单元的测温影响,还可以排除空气,提高管道向测温单元的热传导效应,提高测温的精确性。(The invention provides a pipe clamp type temperature transmitter and a medium temperature detection method thereof, wherein the pipe clamp type temperature transmitter comprises: the clamp unit is matched with the pipeline with the temperature of the pipe wall to be measured; a mount unit disposed on the clamp unit; and the temperature measuring unit penetrates through the mounting seat unit and the hoop unit and acts with the pipeline. The temperature of the pipe wall to be measured in the area needing to be measured can be collected and the temperature of the flow medium can be obtained by adjusting the positions of the hoop unit and the pipeline; the influence of external environmental conditions on the temperature measuring unit is isolated through the mounting seat unit, the temperature measuring influence of temperature change on the temperature measuring unit is blocked, air can be removed, the heat conduction effect of a pipeline to the temperature measuring unit is improved, and the accuracy of temperature measurement is improved.)

1. A tube clamp type temperature transmitter, comprising:

the clamp unit is matched with the pipeline with the temperature of the pipe wall to be measured;

a mount unit disposed on the clamp unit;

and the temperature measuring unit penetrates through the mounting seat unit and the hoop unit and acts with the pipeline.

2. The pipe clamp type temperature transmitter of claim 1, wherein the temperature measuring unit comprises a sealing head and a temperature measuring cable, the temperature measuring cable is connected with the sealing head, and the sealing head acts on a pipe with a pipe wall temperature to be measured.

3. The pipe clamp temperature transmitter of claim 2, wherein the temperature measuring unit is manufactured by steps comprising:

welding a temperature measuring tube with the temperature measuring cable, and filling magnesium oxide powder in a gap between the temperature measuring tube and the temperature measuring cable;

and welding the part of the temperature measuring cable exposed out of the temperature measuring pipe with the seal head.

4. The pipe clamp temperature transmitter of claim 3, wherein the portion of the temperature cable exposed out of the temperature tube comprises a thin film platinum resistance element that is welded to the head by a silver wire.

5. The pipe clamp temperature transmitter of claim 4, wherein the mathematical expression of the resistance of the thin film platinum resistor element and the temperature of the pipe wall to be measured is:

R_t＝R₀+AT+BT²

wherein R is_tIs the resistance value, R, of the thin film platinum resistance element at the current temperature₀The resistance value of the film platinum resistance element at 0 ℃, T is the current temperature of the pipe wall to be measured, A is a first characterization constant, and B is a second characterization constant.

6. A pipe clamp temperature transmitter according to claim 1, characterized in that the band unit comprises a first body and a second body, the mount unit being arranged on the first body, the first body and the second body being detachably connected.

7. The pipe clamp type temperature transmitter according to any one of claims 1 to 6, wherein the mounting base unit comprises a lock nut, a lock bolt and a seal ring, the lock nut and the lock bolt are respectively provided with a mounting hole for mounting the temperature measuring unit, the mounting holes respectively penetrate through the lock nut and the lock bolt, and the seal ring is arranged between the lock nut and the lock bolt.

8. A method for sensing the temperature of a medium in a pipe clamp type temperature transmitter using the pipe clamp type temperature transmitter as claimed in any one of claims 1 to 7, comprising:

installing the hoop unit on a pipeline with the temperature of the pipe wall to be measured, and installing the temperature measuring unit on the installation base unit;

the temperature of the pipe wall to be measured is obtained by detecting the resistance of the temperature measuring unit, and the medium temperature in the pipeline is determined by the temperature of the pipe wall to be measured.

9. Pipe clamp temperature transmitter medium temperature detection method according to claim 8,

the temperature measuring unit comprises an end enclosure and a temperature measuring cable, the temperature measuring cable is connected with the end enclosure, and the end enclosure acts on a pipeline with the temperature of a pipe wall to be measured;

the manufacturing steps of the temperature measuring unit comprise: welding a temperature measuring tube with the temperature measuring cable, and filling magnesium oxide powder in a gap between the temperature measuring tube and the temperature measuring cable; welding the part of the temperature measuring cable exposed out of the temperature measuring pipe with the seal head;

the part of the temperature measuring cable, which is exposed out of the temperature measuring tube, comprises a thin film platinum resistance element, and the thin film platinum resistance element is welded with the end enclosure through a silver wire.

10. Pipe clamp temperature transmitter medium temperature detection method according to claim 9,

the mathematical expression of the resistance value of the thin film platinum resistance element and the temperature of the pipe wall to be measured is as follows:

R_t＝R₀+AT+BT²

wherein R is_tIs the resistance value, R, of the thin film platinum resistance element at the current temperature₀The resistance value of the film platinum resistance element at 0 ℃, T is the current temperature of the pipe wall to be measured, A is a first characterization constant, and B is a second characterization constant.

Technical Field

The invention relates to the technical field of detection, in particular to a pipe clamp type temperature transmitter and a medium temperature detection method thereof.

Background

During routine work and maintenance of the pipeline, the temperature of the pipe wall needs to be measured, which in turn reflects the temperature of the medium in the pipeline or in the vessel.

The existing temperature sensor for measuring the pipe wall or the container surface mainly comprises a heat collecting block welded on the surface of a pipe or a container, and a thermocouple or a thermal resistor inserted and fixed on the heat collecting block for sensing temperature.

In actual temperature measurement, the environment temperature of the heat insulation layer is atmospheric temperature, the change of the environment temperature can occur in four seasons or in the morning and evening, after the environment temperature changes, the temperature of the pipe wall or the surface of the container changes along with the change according to the heat transfer characteristic, and the measured temperature cannot truly reflect the temperature of a medium in the pipeline or the container.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a tube clamp type temperature transmitter and a medium temperature detecting method thereof, which are used to solve the problem that the temperature measurement of the tube wall and the medium in the prior art is easily affected by the ambient temperature and is inaccurate.

To achieve the above and other related objects, the present invention provides a tube clamp type temperature transmitter, including:

the clamp unit is matched with the pipeline with the temperature of the pipe wall to be measured;

a mount unit disposed on the clamp unit;

and the temperature measuring unit penetrates through the mounting seat unit and the hoop unit and acts with the pipeline.

Optionally, the temperature measuring unit includes a sealing head and a temperature measuring cable, the temperature measuring cable is connected to the sealing head, and the sealing head acts on the pipeline of the temperature of the pipe wall to be measured.

Optionally, the manufacturing steps of the temperature measuring unit include:

welding a temperature measuring tube with the temperature measuring cable, and filling magnesium oxide powder in a gap between the temperature measuring tube and the temperature measuring cable;

and welding the part of the temperature measuring cable exposed out of the temperature measuring pipe with the seal head.

Optionally, the part of the temperature measuring cable, which is exposed out of the temperature measuring tube, comprises a thin film platinum resistance element, and the thin film platinum resistance element is welded with the end enclosure through a silver wire.

Optionally, the mathematical expression of the resistance value of the thin film platinum resistor element and the temperature of the pipe wall to be measured is as follows:

R_t＝R₀+AT+BT²

wherein R is_tIs the resistance value, R, of the thin film platinum resistance element at the current temperature₀The resistance value of the film platinum resistance element at 0 ℃, T is the current temperature of the pipe wall to be measured, A is a first characterization constant, and B is a second characterization constant.

Optionally, the clamp unit includes a first body and a second body, the mounting seat unit is disposed on the first body, and the first body and the second body are detachably connected.

Optionally, the mounting base unit includes a locking nut, a locking bolt and a sealing ring, the locking nut and the locking bolt are respectively provided with a mounting hole for mounting the temperature measuring unit, the mounting holes respectively penetrate through the locking nut and the locking bolt, and the sealing ring is arranged between the locking nut and the locking bolt.

A method for detecting the medium temperature of a pipe clamp type temperature transmitter is used, and the pipe clamp type temperature transmitter comprises the following steps:

installing the hoop unit on a pipeline with the temperature of the pipe wall to be measured, and installing the temperature measuring unit on the installation base unit;

and acquiring the temperature of the pipe wall to be detected by detecting the resistance of the temperature measuring unit.

Optionally, the temperature measuring unit includes a sealing head and a temperature measuring cable, the temperature measuring cable is connected to the sealing head, and the sealing head acts on the pipeline with the temperature of the pipe wall to be measured;

the manufacturing steps of the temperature measuring unit comprise: welding a temperature measuring tube with the temperature measuring cable, and filling magnesium oxide powder in a gap between the temperature measuring tube and the temperature measuring cable; welding the part of the temperature measuring cable exposed out of the temperature measuring pipe with the seal head;

the part of the temperature measuring cable, which is exposed out of the temperature measuring tube, comprises a thin film platinum resistance element, and the thin film platinum resistance element is welded with the end enclosure through a silver wire.

Optionally, the mathematical expression of the resistance value of the thin film platinum resistor element and the temperature of the pipe wall to be measured is as follows:

R_t＝R₀+AT+BT²

wherein R is_tIs the resistance value, R, of the thin film platinum resistance element at the current temperature₀The resistance value of the film platinum resistance element at 0 ℃, T is the current temperature of the pipe wall to be measured, A is a first characterization constant, and B is a second characterization constant.

As mentioned above, the pipe clamp type temperature transmitter and the medium temperature detection method thereof have the following beneficial effects:

the pipe wall temperature to be measured and the medium temperature of the area to be measured can be acquired by adjusting the positions of the hoop unit and the pipeline;

the influence of external environmental conditions on the temperature measuring unit is isolated through the mounting seat unit, the temperature measuring influence of temperature change on the temperature measuring unit is blocked, air can be removed, the heat conduction effect of a pipeline to the temperature measuring unit is improved, and the accuracy of temperature measurement is improved.

Drawings

Fig. 1 is a schematic structural diagram of a pipe clamp type temperature transmitter according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a temperature measuring unit according to an embodiment of the invention.

Description of reference numerals

1 temperature measuring tube

2 locking nut

3 first seal ring

4 locking bolt

5 second seal ring

6 mount pad unit

7 temperature measuring unit

8 clamp unit

9 pipeline

71 temperature measuring cable

72 thin film platinum resistance element

73 end socket

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.

Please refer to fig. 1-2. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated. The structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the art, and any structural modifications, changes in proportions, or adjustments in size, which do not affect the efficacy and attainment of the same are intended to fall within the scope of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Referring to fig. 1 and 2, the present invention provides a tube clamp type temperature transmitter, including:

the clamp unit 8 is matched with the pipeline 9 with the temperature of the pipe wall to be measured, and the temperature of the pipe wall to be measured in the area needing to be measured can be collected by adjusting the positions of the clamp unit 8 and the pipeline 9;

the mounting seat unit 6 is arranged on the hoop unit 8, and the mounting seat unit 6 is used for assembling the temperature measuring unit 7;

the temperature measuring unit 7 is characterized in that the temperature measuring unit 7 penetrates through the mounting seat unit 6 and the hoop unit 8 and interacts with the pipeline 9 to obtain the temperature of the pipe wall of the pipeline 9, the temperature of a flow medium in the pipeline is determined through the pipe wall temperature, the influence of external environmental conditions on the temperature measuring unit 7 is isolated through the mounting seat unit 6, the temperature measuring influence of temperature change on the temperature measuring unit 7 is blocked, air can be removed, the heat conduction effect of the pipeline 9 to the temperature measuring unit 7 is improved, and the accuracy of temperature measurement of the pipe wall and the flow medium is improved.

In order to further improve the temperature measurement accuracy, temperature measurement unit 7 includes head 73 and temperature measurement cable 71, temperature measurement cable 71 with head 73 is connected, just head 73 acts on the pipeline 9 of the pipe wall temperature that awaits measuring, the temperature measurement cable can be subassembly constitutions such as temperature measurement optic fibre, thermistor, gathers the pipe wall temperature of pipeline 9, head 73 can adopt the metal components and parts that the heat conductivity is high, electric conductivity is strong to make, for example, can select to make with metal silver, is convenient for with gathering and conduction heat signal.

The manufacturing steps of the temperature measuring unit 7 comprise:

welding a temperature measuring tube 1 and the temperature measuring cable 71, and filling magnesia powder in a gap between the temperature measuring tube 1 and the temperature measuring cable 71;

and welding the part of the temperature measuring cable 71 exposing the temperature measuring pipe 1 with the seal head 73.

Optionally, the part of the temperature measuring cable 71, which exposes the temperature measuring tube 1, includes a thin film platinum resistance element 72, and the thin film platinum resistance element 72 is welded to the end enclosure 73 through a silver wire.

The inventor finds that the resistance value of the thin film platinum resistance element 72 has a certain mapping relation with the temperature, and the purpose of measuring the pipe wall temperature of the pipeline 9 by measuring the resistance value of the thin film platinum resistance element 72 can be achieved by collecting the resistance value of the thin film platinum resistance element 72 and converting the resistance value, and the mathematical expression of the resistance value of the thin film platinum resistance element 72 and the pipe wall temperature to be measured is as follows:

R_t＝R₀+AT+BT²

wherein R is_tIs the resistance value, R, of the thin film platinum resistance element at the current temperature₀The resistance value of the thin film platinum resistance element at 0 ℃, T is the temperature of the current pipe wall to be measured, A is a first characterization constant, B is a second characterization constant, the first characterization constant and the second characterization constant are constants, the constant value is influenced by the pipeline 9 or the end socket 73, and is also influenced by the performance of the thin film platinum resistance element 72, and the calibration can be carried out through a limited test, so that higher sensitivity and resolution are obtained. By acquiring the temperature of the pipe wall to be measured, the temperature of the flow medium in the pipeline can be determined.

In order to facilitate the detachment, installation and maintenance, the hoop unit 8 comprises a first body and a second body, the installation seat unit 6 is arranged on the first body, and the first body and the second body are detachably connected.

In order to avoid the influence of rain and snow weather on temperature measuring unit 7, sealing treatment can also be carried out, mount pad unit 6 includes lock nut 2, lock bolt 4, sealing washer, lock nut 2 with lock bolt 4 all is equipped with the mounting hole that is used for installing temperature measuring unit 7 correspondingly, the installation is run through in hole respectively lock nut 2 with lock bolt 4, lock nut 2 with be equipped with between the lock bolt 4 the sealing washer, for example, set up first sealing washer 3 in nut 2 and lock bolt 4 complex top, set up second sealing washer 5 in nut 2 and lock bolt 4 complex below to avoid because rainwater, snow water or vapor are to temperature measuring unit 7's temperature measurement influence, improve the temperature measurement accuracy.

The invention also provides a medium temperature detection method of the pipe clamp type temperature transmitter, which utilizes the pipe clamp type temperature transmitter and comprises the following steps:

installing the hoop unit 8 on a pipeline 9 with the temperature of the pipe wall to be measured, and installing the temperature measuring unit 7 on the installation base unit 6;

the temperature of the pipe wall to be detected is obtained by detecting the resistance of the temperature measuring unit 7, and the temperature of the flow medium in the pipeline is determined according to the temperature of the pipe wall to be detected.

Optionally, the temperature measuring unit 7 includes a sealing head 73 and a temperature measuring cable 71, the temperature measuring cable 71 is connected to the sealing head 73, and the sealing head 73 acts on the pipeline 9 to be measured;

the manufacturing steps of the temperature measuring unit 7 comprise: welding a temperature measuring tube 1 and the temperature measuring cable 71, and filling magnesia powder in a gap between the temperature measuring tube 1 and the temperature measuring cable 71; welding the part of the temperature measuring cable 71 exposing the temperature measuring pipe 1 with the seal head 73;

the part of the temperature measuring cable 71, which exposes the temperature measuring tube 1, comprises a thin film platinum resistance element 72, and the thin film platinum resistance element 72 is welded with the end socket 73 through a silver wire.

Optionally, the mathematical expression of the resistance value of the thin film platinum resistor element 72 and the temperature of the pipe wall to be measured is as follows:

R_t＝R₀+AT+BT²

wherein R is_tIs the resistance value, R, of the thin film platinum resistance element at the current temperature₀Is the resistance value of the film platinum resistance element at 0 ℃, T is the current pipe wall temperature to be measured, A is a first representationAnd B is a second characterization constant.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.