Split-type external protective sleeve device of temperature measurement sensor capable of being quickly replaced on line

Abstract

The utility model relates to a temperature measurement sensor split type external protective sleeve device capable of being rapidly replaced on line, and belongs to the technical field of instrument and meter installation. Comprising an outer protection pipe and an inner protection pipe, and a circulating air pipe penetrates through the inner protection pipe; the outer protection pipe is arranged outside the circulating air pipe, the inner protection pipe is sleeved with the outer protection pipe, one end of the outer protection pipe is fixed to the outer wall of the circulating air pipe, and a second flange is arranged at the other end of the outer protection pipe; a blank cap is arranged at the inner end of the inner protective pipe, and a first flange is arranged at the outer end of the inner protective pipe; a fastening mounting base is arranged in the center of the bottom of the first flange; the detection end of the temperature measuring sensor with the nut is arranged in the inner protective tube, and the nut of the temperature measuring sensor with the nut is in threaded connection with the fastening mounting base; and the first flange is fixedly connected with the second flange, so that the outer protection pipe is fixedly connected with the inner protection pipe. The temperature measuring sensor is prevented from being in direct contact with severe working conditions, and the service life and the maintenance period of the temperature measuring sensor are prolonged.

Description

Technical Field

[0001] The utility model relates to a split external protective cover device for a temperature sensor which can be quickly replaced online and belongs to the technical field of instrument installation. Background Art

[0002] Temperature sensors are widely used in industrial automation, automatically performing measurement and recording tasks, serving as the equivalent of early warning radar on the battlefield. Therefore, their accuracy and precision are crucial. In industrial production, particularly in the metallurgical and building materials industries, some operating conditions are extremely harsh, and the operating environment of temperature sensors is extremely poor, significantly reducing their lifespan and causing them to be easily damaged by erosion and wear. Furthermore, for instruments requiring contact measurement technology, high air volume, high velocity, and high dust levels can lead to inaccurate measurement data, which can easily cause related equipment or production lines to stop.

[0003] In large-scale vertical mill outlet temperature monitoring applications, since the mill's circulating air ducts transport finished powder, hundreds of tons of finished powder per hour, accompanied by high-volume, high-velocity airflow, constantly erode various components. Steel plates tens of millimeters thin can be reduced to paper-thin in just a few months. Conventional casing platinum RTD sensors have an average online service life of less than one month. The mill outlet temperature serves as a "warning radar" for mill operation, constantly prompting operators to adjust relevant process parameters in advance, directly affecting the stable operation of large vertical mills. Furthermore, if outlet temperature monitoring fails and cannot be controlled to exceed 130°C or higher, the service life and effectiveness of acrylic-coated filter bags worth hundreds of thousands of yuan will be seriously affected. Frequent replacement of temperature sensor spare parts wastes equipment costs and consumes excessive maintenance manpower. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide a split external protective cover device for a temperature sensor that can be quickly replaced online in response to the above-mentioned existing technology, so as to avoid direct contact between the temperature sensor and harsh working conditions, extend the service life and maintenance cycle of the temperature sensor in harsh environments, ensure the detection accuracy and stability of the temperature sensor, reduce spare parts costs, and reduce maintenance manpower.

[0005] The technical solution adopted by the present invention to solve the above-mentioned problems is: a split-type external protective cover device for a temperature sensor that can be quickly replaced online, comprising an outer protective tube and an inner protective tube, the inner protective tube passing through the circulating air duct, so that a part of the inner protective tube is arranged inside the circulating air duct, and the other part of the inner protective tube is arranged outside the circulating air duct; the outer protective tube is arranged outside the circulating air duct, the outer protective tube is sleeved on the inner protective tube, one end of the outer protective tube is fixed to the outer wall of the circulating air duct, and a second flange is arranged at the other end of the outer protective tube; a blind cover is provided at the inner end of the inner protective tube, and a first flange is provided at the outer end of the inner protective tube; a fastening mounting base is provided at the bottom center of the first flange; the detection end of the temperature sensor with a nut is arranged in the inner protective tube, and the nut of the temperature sensor with a nut is threadedly connected to the fastening mounting base; the first flange is fixedly connected to the second flange, so that the outer protective tube and the inner protective tube are fixedly connected.

[0006] A sealing gasket is provided between the first flange and the second flange.

[0007] A wear-resistant layer is provided on the windward side of the inner protective tube arranged in the circulating air duct.

[0008] The outer diameter of the inner protective tube is smaller than the inner diameter of the outer protective tube; the inner diameter of the inner protective tube is larger than the outer diameter of the temperature sensor.

[0009] A ball valve is provided on the outer protective tube.

[0010] Compared with the existing technology, the advantages of the present invention are: a split external protective cover device for the temperature sensor that can be quickly replaced online, with a simple structure and convenient operation, avoiding direct contact between the temperature sensor and harsh working conditions, ensuring the detection accuracy and stability of the temperature sensor, extending the service life and maintenance cycle of the temperature sensor in harsh environments, reducing spare parts costs, and reducing maintenance manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of a split external protective cover device for a temperature sensor that can be quickly replaced online according to an embodiment of the present utility model;

[0012] In the figure, 1 is the temperature sensor with a nut, 2 is the fastening mounting base, 3 is the second plate-type flat welding flange, 4 is the sealing gasket, 5 is the first plate-type flat welding flange, 6 is the ball valve, 7 is the outer protective tube, 8 is the inner protective tube, 9 is the blind cover, 10 is the wear-resistant layer, and 11 is the circulating air duct. DETAILED DESCRIPTION

[0013] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0014] like Figure 1As shown, in this embodiment, a split-type external protective cover device for a temperature sensor that can be quickly replaced online includes an outer protective tube 7 and an inner protective tube 8. The inner protective tube 8 is vertically inserted into the circulating air duct 11, so that a portion of the inner protective tube 8 is located inside the circulating air duct 11 and the other portion is located outside the circulating air duct. The outer protective tube 7 is sleeved onto the inner protective tube located outside the circulating air duct. One end of the outer protective tube is fixed to the outer wall of the circulating air duct by welding, and a second plate-type flat-welded flange 3 is provided at the other end of the outer protective tube 7. A cover 9 is provided at the inner end of the inner protective tube 8 to prevent powder from entering the inner protective tube. A first plate-type flat-welded flange 5 is provided at the other end of the inner protective tube 8, and a fastening mounting base 2 is provided at the bottom center of the first plate-type flat-welded flange 5. The detection end of the nut-mounted temperature sensor 1 is located within the inner protective tube 8, preventing the nut-mounted temperature sensor from directly contacting the high air volume, high wind speed, and dust-prone interior of the circulating air duct. The nut of the nut-mounted temperature sensor 1 is threadedly connected to the mounting base 2, securing the sensor to the mounting base. The first plate-type flat-weld flange 5 and the second plate-type flat-weld flange 3 are bolted together, securing the outer and inner protective tubes. Loosening the bolts and nuts allows the inner protective tube, nut-mounted temperature sensor, and outer protective tube to be removed, making assembly and disassembly quick and easy.

[0015] A ball valve 6 is provided in the middle of the outer protective tube 7. When the inner protective tube is pulled out, the ball valve is closed to cut off the communication between the inside and outside of the circulating air duct, thereby preventing rainwater or humid air from being sucked into the circulating air duct by the large negative pressure during replacement.

[0016] A sealing gasket 4 is provided between the first plate-type flat welding flange and the second plate-type flat welding flange to achieve internal and external sealing of the circulating air duct.

[0017] The windward side wall of the inner protective pipe arranged in the circulating air duct is surfacingly welded to form a wear-resistant layer 10, thereby improving the wear resistance of the windward side of the inner protective pipe.

[0018] The outer diameter of the inner protective tube is smaller than the inner diameter of the outer protective tube; the inner diameter of the inner protective tube is larger than the outer diameter of the temperature sensor. The inner protective tube is installed in the middle of the outer protective tube, generally with a spacing of 5mm to prevent the inner protective tube from being corroded, damaged or deformed. It can still flexibly enter and exit the outer protective tube, avoiding obstruction and difficulty in replacement.

[0019] The present application has a simple structure and is easy to operate. It avoids direct contact of the temperature sensor with harsh working conditions, ensures the detection accuracy and stability of the temperature sensor, extends the service life and maintenance cycle of the temperature sensor in harsh environments, reduces spare parts costs, and reduces maintenance manpower.

[0020] In addition to the above embodiments, the present invention also includes other implementation methods. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of protection of the claims of the present invention.

Claims

1. A split external protective cover device for a temperature sensor that can be quickly replaced online, characterized by: It includes an outer protective tube and an inner protective tube, the inner protective tube is passed through the circulating air duct, so that a part of the inner protective tube is arranged in the circulating air duct, and the other part of the inner protective tube is arranged outside the circulating air duct; the outer protective tube is arranged outside the circulating air duct, the outer protective tube is sleeved on the inner protective tube, one end of the outer protective tube is fixed to the outer wall of the circulating air duct, and a second flange is arranged at the other end of the outer protective tube; the inner end of the inner protective tube is provided with a blind cover, and the outer end of the inner protective tube is provided with a first flange; a fastening mounting base is provided at the bottom center of the first flange; the detection end of the temperature sensor with a nut is arranged in the inner protective tube, and the nut of the temperature sensor with a nut is threadedly connected to the fastening mounting base; the first flange is fixedly connected to the second flange, so that the outer protective tube and the inner protective tube are fixedly connected.

2. The temperature sensor split-type external protective cover device capable of rapid online replacement according to claim 1, characterized in that: A sealing gasket is provided between the first flange and the second flange.

3. The temperature sensor split-type external protective cover device capable of rapid online replacement according to claim 1, characterized in that: A wear-resistant layer is provided on the windward side of the inner protective tube arranged in the circulating air duct.

4. The temperature sensor split-type external protective cover device capable of rapid online replacement according to claim 1, characterized in that: The outer diameter of the inner protective tube is smaller than the inner diameter of the outer protective tube; the inner diameter of the inner protective tube is larger than the outer diameter of the temperature sensor.

5. The temperature sensor split-type external protective cover device capable of rapid online replacement according to claim 1, characterized in that: A ball valve is provided on the outer protective tube.

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