Nuclear power product prognosis heat automatic temperature measurement and centralized monitoring system and temperature measurement sensor thereof

Abstract

The utility model provides a nuclear power product prognosis heat automatic temperature measurement and centralized monitoring system and an on-site temperature measurement sensor contained in the system. The on-site temperature measurement sensor comprises a thermocouple, a first magnet and a first housing for fixing the thermocouple and the first magnet. The first magnet is used for adsorbing and fixing the sensor on the surface of a workpiece; the first shell is provided with a rear wall and a circumferential side wall, the first magnet is located in the first shell, and the side wall of the first shell surrounds the first magnet; and the thermocouple passes through the first through hole in the rear wall of the first shell and the central hole of the first magnet, so that the end of the working end of the thermocouple is exposed in front of the magnet and is used for contacting a temperature measurement part on a workpiece for temperature measurement. The on-site temperature measuring sensor and the wireless transmitting device are fixed on a workpiece in a magnetic attraction manner, so that all-time detection and real-time transmission of the weld prognosis heat temperature can be realized on workpiece surfaces in various forms and various complicated and random working conditions in the manufacturing process of nuclear power main equipment.

Description

Technical Field

[0001] The utility model relates to the field of nuclear power equipment monitoring, in particular to a nuclear power product post-heat automatic temperature measurement and centralized monitoring system and a temperature measurement sensor thereof. Background Art

[0002] In the manufacturing process of nuclear island main equipment products, preheating and post-heating during welding are common and important processes. For each weld at the production site, the real-time temperature is required to be measured and recorded at least once every hour / half an hour during the preheating and post-heating process. Therefore, in the manufacturing of nuclear island main equipment, the data recorded every day generally exceeds 6,000 groups, the temperature is measured more than 10,000 times, and the amount of data is huge. Originally, the temperature was manually measured and recorded by a handheld contact thermometer, which consumed a lot of manpower and material resources. During the temperature measurement interval, abnormal conditions could not be monitored in time, and the operators had to face high temperature, dust, and high-altitude working environments, which posed hidden dangers to on-site safety and quality. Especially in the late night and early morning, when people are tired and exhausted, the safety of on-site personnel and the accuracy of temperature measurement data urgently require an advanced means, which is also the need for digital applications. Utility Model Content

[0003] The purpose of the utility model is to provide an on-site temperature sensor that can be used to measure temperature during the preheating process of nuclear power products. Another purpose of the utility model is to provide an automatic temperature measurement and centralized monitoring system for preheating of nuclear power products, which can replace the original manual temperature measurement and recording method during the preheating of nuclear power products, and transmit the temperature measurement data in real time through a wireless transmitter adsorbed on the surface of the workpiece together with the on-site temperature sensor.

[0004] A technical solution of the utility model is to provide an on-site temperature measurement sensor, which comprises: a thermocouple, a first magnet and a first housing for fixing the two; the first magnet is used to adsorb and fix the sensor on the surface of a workpiece;

[0005] The first shell has a rear wall and a circumferential side wall, the first magnet is located in the first shell, and the side wall of the first shell surrounds the first magnet; the thermocouple passes through the first through hole of the rear wall of the first shell and the center hole of the first magnet, so that the end of the working end of the thermocouple is exposed in front of the magnet, which is used to contact the temperature measuring part on the workpiece for temperature measurement.

[0006] Optionally, a heat-conducting ring is provided at the end of the working end of the thermocouple to increase the heat transfer contact surface.

[0007] Optionally, a first spring is provided between the end of the working end of the thermocouple and the front end surface of the first magnet, and the first spring is sleeved on the thermocouple; when the sensor is adsorbed and fixed on the surface of the workpiece to move the thermocouple backward, the first spring is in a compressed state, pressing the end of the working end of the thermocouple against the contact surface of the temperature measuring part of the workpiece.

[0008] Optionally, a front clamping block is provided in the center hole of the first magnet, and the front clamping block is sleeved on the thermocouple and can move forward and backward with the thermocouple; a second spring is provided between the front clamping block and the inner surface of the rear wall of the first shell, and the second spring is sleeved on the thermocouple. When the sensor is adsorbed and fixed on the surface of the workpiece, so that the front clamping block moves backward with the thermocouple, the second spring is in a compressed state.

[0009] Optionally, a heat-insulating protective sleeve is provided at the rear of the first shell, and a second through hole is provided inside the heat-insulating protective sleeve, and the thermocouple passing through the first through hole of the rear wall of the first shell further passes through the second through hole.

[0010] Optionally, the second through hole includes a second through hole front section and a second through hole rear section; a rear clamping block is provided inside the second through hole rear section, and the rear clamping block is sleeved on the thermocouple and can move back and forth with the thermocouple; the radial dimension of the second through hole front section is smaller than the radial dimension of the second through hole rear section, and the front end of the rear clamping block is limited by the protective cover body around the second through hole front section.

[0011] Optionally, the thermocouple is provided with an extension line for connecting the reference end of the thermocouple to a wireless transmitting device; the wireless transmitting device is used to transmit the temperature data measured by the thermocouple to the outside.

[0012] Optionally, the box body of the wireless transmitting device is wrapped with a second shell, and a heat insulating component is provided between the box body and the second shell; a second magnet is provided at the second shell to adsorb and fix the wireless transmitting device on the surface of the workpiece.

[0013] Optionally, the workpiece may be a workpiece in a rotating state and / or a heated state, but is not limited thereto.

[0014] Another technical solution of the utility model is to provide a nuclear power product post-heat automatic temperature measurement and centralized monitoring system, which includes:

[0015] Any of the above field temperature sensors;

[0016] A wireless transmitting device is adsorbed together with the on-site temperature measuring sensor on the workpiece surface of the nuclear power main equipment, receives the temperature data measured by the thermocouple of the on-site temperature measuring sensor and transmits it to the outside;

[0017] The wireless gateway communicates with multiple wireless transmitters through a wireless network, receives the temperature data sent by each of them, and transmits it to the equipment in the centralized monitoring center for processing.

[0018] Optionally, the thermocouple of the on-site temperature measurement sensor measures the weld temperature of the workpiece during preheating and post-heating.

[0019] Optionally, the wireless gateway is an industrial Internet of Things 4G gateway deployed in a workshop, which aggregates the received temperature data and transmits it to a network switch in the workshop via optical fiber, and communicates with a network switch in a centralized monitoring center through the network switch for data transmission.

[0020] Optionally, the centralized monitoring center is provided with a PC server equipped with a temperature collection management system, which aggregates and stores the temperature data transmitted by the network port, supports real-time monitoring of the weld temperature collected from the temperature measuring points of different workpieces in various areas of the site, and issues an alarm for abnormal data.

[0021] Compared with the existing technology that uses manual temperature measurement and data recording, when using the new automatic temperature measurement and centralized monitoring system of the utility model, the operator only needs to be at a fixed location indoors to conduct full-time and visual monitoring of the temperature of each weld being heated in the workshop. Through the temperature collection and management system of the centralized monitoring center, the temperature measurement points of different workpieces in various areas of the workshop can be accurately monitored in real time to detect abnormal conditions in a timely manner. Using the digital system, the temperature data collected by the temperature measuring device on site can be directly stored, and can be quickly and accurately queried and traced when necessary.

[0022] Under the premise of achieving the temperature measurement accuracy required by the process standards, the utility model can also realize full-time temperature measurement and real-time monitoring. It has the advantages of high efficiency, wide application range, digitization, informatization, integration, etc., while also greatly reducing labor costs and reducing safety risks.

[0023] The on-site temperature measurement sensor and wireless transmitter of the utility model are fixed on the surface of the workpiece by magnetic attraction, so as to realize temperature detection and real-time transmission at all times during the preheating and post-heating process of the weld. They can be applied to workpieces in various rotating heating states and are suitable for workpiece surfaces of various forms. They can work in an environment of high temperature, dust and slight collision and pulling, and the data can be transmitted in real time, accurately and reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the automatic temperature measurement and centralized monitoring system for post-heating of nuclear power products described in the utility model.

[0025] Figure 2 It is a schematic diagram of the external structure of the on-site temperature measurement sensor described in the embodiment of the utility model.

[0026] Figure 3 It is a schematic diagram of the internal structure of the on-site temperature measurement sensor described in the embodiment of the utility model. DETAILED DESCRIPTION

[0027] like Figure 1As shown, the utility model provides a nuclear power product pre- and post-heating automatic temperature measurement and centralized monitoring system, which mainly includes three parts: one is an on-site temperature measurement sensor 10 and a wireless transmitter 20; the second is an industrial Internet of Things 4G gateway data transmission network; and the third is a centralized monitoring center 300.

[0028] The on-site temperature sensor 10 is a portable device that can be fixed on the surface of the workpiece by magnetic attraction, and uses a thermocouple 11 as a temperature measurement sensor to realize temperature detection at all times during the preheating and post-heating process of the weld; the wireless transmitter 20, which is also fixed on the workpiece by magnetic attraction, can transmit the temperature data obtained by the sensor in real time; the workshop 200 deploys a 4G gateway 30 to receive data transmitted by multiple wireless transmitters 20, and finally transmits it to the centralized monitoring center 300 stably and reliably via optical fiber; the PC server 50 of the centralized monitoring center 300 manages all data through the temperature acquisition management system, and displays it in partitions through an operable display interface, ultimately realizing centralized monitoring of all weld preheating and post-heating temperature data at the workshop site 100.

[0029] The field temperature sensor 10 and the wireless transmitter 20 provided by the utility model can be applied to the main equipment of the large nuclear island, especially to the workpiece in the rotating heating state and suitable for the workpiece surface of various forms, and can work in the environment of high temperature, dust and slight collision and pulling, and the data is transmitted in real time, accurately and reliably. The centralized monitoring center 300 can accurately distinguish the corresponding temperature measurement points of different workpieces in each area through the temperature collection management system to conduct real-time monitoring, and store all the data of the weld temperature of the workpiece during the pre-heating and post-heating process, and can also alarm for abnormal data during monitoring.

[0030] like Figure 2 , Figure 3 As shown, the field temperature measurement sensor 10 of the utility model comprises a thermocouple 11, a magnet 12 and a housing 13 for fixing the two. The sensor is adsorbed on any temperature measurement position on the workpiece by the magnet 12, and the temperature of the position is measured by the thermocouple 11.

[0031] The housing 13 is made of metal and is a cylindrical structure with a closed rear end and an open front end. It is provided with a rear wall 132 and a circumferential side wall 131. The magnet 12, for example, a high temperature resistant samarium cobalt magnet, is roughly cylindrical and fixedly arranged in the housing 13, and the side wall 131 of the housing 13 surrounds the magnet 12. The magnet 12 is provided with a central hole 121, and the rear wall 132 of the housing 13 is provided with a first through hole 133, and the thermocouple 11 can pass through these two holes and move a certain distance along the axial direction of the hole and forward and backward.

[0032] The working end of the thermocouple 11 is left outside the front end surface of the magnet 12, and a copper metal ring 14 is installed at the end to increase the heat transfer contact surface; a first spring 15 for tightening is sleeved on a section of the thermocouple 11 located between the copper metal ring 14 and the front end surface of the magnet 12 to ensure that the end of the working end of the thermocouple 11 can always be pressed against the contact surface of the temperature measuring part of the workpiece. When the sensor is not fixed to the workpiece, the first spring 15 is in its original length. After the magnet 12 is adsorbed onto the surface of the workpiece, the first spring 15 is in a compressed state; the radial dimension of the first spring 15 is larger than the caliber of the front end opening of the center hole 121, and the magnet part around the front end opening of the center hole 121 can limit the rear end of the first spring 15 (and the copper metal ring 14 with a larger radial dimension).

[0033] A section of thermocouple 11 located in the center hole 121 of the magnet 12 is sleeved with a front clamp 18, and can move forward and backward with the thermocouple 11. A second spring 151 is also sleeved on the thermocouple 11 between the front clamp 18 and the inner surface of the rear wall 132 of the shell 13. When the sensor is not fixed to the workpiece, the second spring 151 is in its original length. After the end of the working end of the thermocouple 11 is pressed against the surface of the workpiece, the thermocouple 11 will move backward as a whole, driving the front clamp 18 to move backward, so that the second spring 151 is in a compressed state, and the end of the working end of the thermocouple 11 is pressed against the contact surface of the temperature measuring part of the workpiece. In order to tighten the working end of the thermocouple 11, at least one of the first spring 15 and the second spring 151 is set, and two can also be set at the same time. Figure 3 The copper metal ring 14 at the working end of the thermocouple 11 is omitted.

[0034] The radial dimension of the second spring 151 is larger than the hole of the first through hole 133 of the housing 13, and smaller than the radial dimension of the front block 18, so the rear end of the second spring 151 can be limited by the shell portion around the first through hole 133, and the front block 18 can be made to cooperate with the rear wall 132 of the housing 13 to compress the second spring 151. Optionally, if the diameter of the front end opening of the center hole 121 is small, while allowing the thermocouple 11 to pass through, the magnet portion around the front end opening limits the front end of the front block 18 from the inside to prevent the thermocouple 11 from extending forward too far.

[0035] The outer surface of the rear wall 132 of the shell 13 is provided with a heat-insulating protective sleeve 16, and a second through hole is provided inside the heat-insulating protective sleeve 16, and the thermocouple 11 that passes through the rear wall 132 of the shell 13 further passes through the second through hole; the second through hole includes two front and rear sections, and the internal space of the rear section 161b of the second through hole can accommodate a rear clamping block 19, and the rear clamping block 19 is sleeved on a section of the thermocouple 11 located in the rear section 161b of the second through hole, and can move forward and backward with the thermocouple 11; the radial dimension of the rear clamping block 19 is greater than the radial dimension of the front section 161a of the second through hole, and the front end of the rear clamping block 19 can be limited by the protective sleeve body around the front section 161a of the second through hole to prevent the thermocouple 11 from extending forward too long.

[0036] Optionally, if the diameter of the rear opening of the second through hole is small, the rear end of the rear block 19 can be limited by the protective cover body around the rear opening while allowing the thermocouple 11 to pass through. Figure 3 In the example, a handle 20 is further provided on the outer periphery of the heat-insulating protective cover 16 to facilitate taking the sensor; Figure 2 In another example, the heat insulating protective cover 16 is not provided with the handle 20 .

[0037] The diameter of the example thermocouple 11 is φ1mm, and it is a K-type armored thermocouple. It has been tested in the laboratory and meets the precision requirements of nuclear power manufacturing process. The thermocouple 11, magnet 12 and housing 13 of this sensor will be used in the harsh environment of the workshop site 100, and need to be able to withstand high temperatures above 400°C. The adsorption strength of the magnet 12 needs to ensure that the sensor can rotate with the workpiece without falling. The thermocouple 11 is also provided with an extension wire 17, for example, 1.5 meters long, which can connect the reference end of the thermocouple 11 to the wireless transmitter 20.

[0038] The example wireless transmitter 20 uses 433Mhz radio frequency technology for wireless transmission, which can achieve reliable communication within a range of more than 100 meters, and is used to transmit temperature data obtained from the thermocouple 11. The outside of the box body of the wireless transmitter 20 is further wrapped with a metal shell, and a second magnet is installed at the bottom of the metal shell, which can be adsorbed on the surface of the workpiece. The adsorption strength needs to ensure that the wireless transmitter 20 can rotate with the workpiece without falling. The setting of the extension line 17 of the thermocouple 11 allows the wireless transmitter 20 to be arranged at a place on the workpiece that has a certain temperature difference with the temperature measurement part, but the wireless transmitter 20 is still used at the workshop site 200. For this reason, it is necessary to install heat-insulating materials inside the metal shell so that the wireless transmitter 20 can withstand temperatures exceeding 100°C.

[0039] In an optional example, the temperature transmitter of the thermocouple 11 is integrated with the wireless transmitting device 20, and after the temperature collected by the thermocouple 11 is converted into a corresponding thermoelectromotive force signal, it can be amplified by the temperature transmitter and converted into a standard signal that is convenient for subsequent transmission and processing, and sent out through the wireless transmitting device 20. Alternatively, in another example, there is no need to set up a temperature transmitter, and the wireless transmitting device 20 directly sends the thermoelectromotive force signal provided by the thermocouple 11 outward.

[0040] The industrial Internet of Things 4G gateway 30 is deployed in the workshop 200, receiving and summarizing the data collected on-site by multiple wireless transmitters 20; one gateway can be associated with dozens of wireless transmitters 20. The industrial Internet of Things 4G gateway 30 transmits the summarized data to the existing network switch 40 of the workshop 200 through optical fiber, accesses the office network system of the workshop 200, and then connects to the equipment of the centralized monitoring center 300. It should be noted that the above content is a schematic description of the data transmission network between the workshop 200 and the centralized monitoring center 300 and is not intended to be limiting. The specific data transmission method and related equipment can be configured according to actual application needs, and this article will not go into details one by one.

[0041] The network switch 40 of the centralized monitoring center 300 is connected to the network switch 40 of the workshop 200, and the data transmitted by the network port is collected through the PC server 50 installed with the temperature collection management system. Entering the system operation interface, the temperature collected by the corresponding temperature measurement points of different workpieces in various areas of the workshop site 100 can be searched and monitored in real time as required. At the same time, the system integrates storage and alarm functions to realize the management of temperature data.

[0042] In summary, the utility model provides a pre- and post-heating automatic temperature measurement and centralized monitoring system for nuclear power products, which can be applied to various workpiece surfaces and various complex and random working conditions in the manufacturing process of nuclear power main equipment, and has the characteristics of temperature measurement accuracy reaching the manufacturing process standards of nuclear power products, convenience and high efficiency, and a wide range of applications. The remote automatic temperature measurement device can measure and monitor the weld temperature at all times, and the obtained data is transmitted wirelessly to the temperature monitoring center. All data can be transmitted in real time and stored conveniently, which also makes it possible to trace back when necessary.

[0043] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. A field temperature sensor, characterized in that: The invention comprises: a thermocouple, a first magnet and a first shell for fixing the two; the first magnet is used to adsorb and fix the sensor on the surface of a workpiece; the first shell has a rear wall and a circumferential side wall, the first magnet is located in the first shell, and the side wall of the first shell surrounds the first magnet; the thermocouple passes through a first through hole in the rear wall of the first shell and a central hole of the first magnet, so that the end of the working end of the thermocouple is exposed in front of the magnet, and is used to contact the temperature measuring part on the workpiece for temperature measurement.

2. The on-site temperature measurement sensor according to claim 1, characterized in that: A heat conducting ring is provided at the end of the working end of the thermocouple to increase the heat transfer contact surface; A first spring is provided between the end of the working end of the thermocouple and the front end surface of the first magnet, and the first spring is sleeved on the thermocouple; when the sensor is adsorbed and fixed on the surface of the workpiece to make the thermocouple move backward, the first spring is in a compressed state, pressing the end of the working end of the thermocouple against the contact surface of the temperature measuring part of the workpiece.

3. The on-site temperature measurement sensor according to claim 1, characterized in that: A front clamping block is provided in the center hole of the first magnet, and the front clamping block is sleeved on the thermocouple and can move forward and backward with the thermocouple; a second spring is provided between the front clamping block and the inner surface of the rear wall of the first shell, and the second spring is sleeved on the thermocouple. When the sensor is adsorbed and fixed on the surface of the workpiece, so that the front clamping block moves backward with the thermocouple, the second spring is in a compressed state.

4. The on-site temperature measurement sensor according to claim 1, characterized in that: A heat-insulating protective sleeve is provided at the rear of the first shell, and a second through hole is provided inside the heat-insulating protective sleeve, and the thermocouple passing through the first through hole on the rear wall of the first shell further passes through the second through hole; The second through hole includes a second through hole front section and a second through hole rear section; a rear clamping block is provided inside the second through hole rear section, and the rear clamping block is sleeved on the thermocouple and can move forward and backward with the thermocouple; the radial dimension of the second through hole front section is smaller than the radial dimension of the second through hole rear section, and the front end of the rear clamping block is limited by the protective cover body around the second through hole front section.

5. The on-site temperature measurement sensor according to claim 1, characterized in that: The thermocouple is provided with an extension wire for connecting the reference end of the thermocouple to the wireless transmitting device; The wireless transmitting device is used to transmit the temperature data measured by the thermocouple to the outside; The box body of the wireless transmitting device is wrapped with a second shell, and a heat insulating component is provided between the box body and the second shell; a second magnet is provided at the second shell to adsorb and fix the wireless transmitting device on the surface of the workpiece.

6. The on-site temperature measurement sensor according to any one of claims 1 to 5, characterized in that: The workpiece is a workpiece in a rotating state and / or a heated state.

7. A nuclear power product post-heat automatic temperature measurement and centralized monitoring system, characterized in that: Include: The on-site temperature measurement sensor according to any one of claims 1 to 6; A wireless transmitting device is adsorbed together with the on-site temperature measuring sensor on the workpiece surface of the nuclear power main equipment, and is connected to the extension line of the thermocouple of the on-site temperature measuring sensor to receive the measured temperature data; The wireless gateway is connected to multiple wireless transmitting devices through a wireless network to receive temperature data sent by each of the multiple wireless transmitting devices; the wireless gateway is also connected to the equipment in the centralized monitoring center to transmit temperature data.

8. The nuclear power product post-heat automatic temperature measurement and centralized monitoring system according to claim 7 is characterized in that: The thermocouple of the on-site temperature measurement sensor is used to measure the weld temperature of the workpiece during the preheating and post-heating process.

9. The post-heat automatic temperature measurement and centralized monitoring system for nuclear power products as claimed in claim 8, characterized in that: The wireless gateway is an industrial Internet of Things 4G gateway deployed in a workshop, which is connected to a network switch in the workshop via an optical fiber. The network switch in the workshop is connected to a network switch in a centralized monitoring center for data transmission.

10. The nuclear power product post-heat automatic temperature measurement and centralized monitoring system according to claim 9, characterized in that: The centralized monitoring center is provided with a PC server, and the network switch of the centralized monitoring center is connected to the PC server for data transmission.

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