Platinum resistor temperature transmitter

Abstract

The invention discloses a platinum resistor temperature transmitter, relates to the field of transmitters, and aims at improving the temperature measurement accuracy and reducing the installation difficulty by realizing angle adjustment and adapting to an uneven environment. The bottom of the gauge outfit is connected with a mounting disc which is provided with flange mounting holes and connected with a hose protection cylinder, the bottom of the hose protection cylinder is connected with a protection sleeve through a connecting disc, and a conduit tube in the through space is connected with the gauge outfit and a sensor connector. The elastic rod, the boss, the spring and the hose with the coating in the hose protection cylinder are matched, the take-up device on the installation disc controls the connection line in a linkage mode through the controller, and compared with the prior art, the transmitter can adapt to complex installation environments such as inclination and limited space, can accurately align at a target temperature measurement point, reduces installation rework and equipment cost, and has practicability and economical efficiency.

Description

TECHNICAL FIELD

[0001] The application relates to the field of transmitters, in particular to a platinum resistance temperature transmitter. BACKGROUND

[0002] In the prior art, the basic structure of a platinum resistance temperature transmitter generally comprises a meter head, a mounting assembly, a protective sleeve and a sensor connector, the meter head is responsible for signal processing and display, the mounting assembly realizes device fixation through a flange or a threaded structure, the protective sleeve protects the internal wires and the sensor connector, and the sensor connector internally contains a platinum resistance element to complete temperature signal acquisition. With the complication of industrial production scenes, higher requirements are put forward for the adaptability, temperature measurement accuracy and installation convenience of temperature transmitters, but there are still many problems to be solved in the prior art. In terms of installation adaptation, the measured devices in industrial sites are often limited by factors such as long-term running loss, insufficient installation space planning or multi-device integrated layout, and the installation surface often has conditions such as inclination, local protrusion or narrow space. However, the existing platinum resistance temperature transmitters mostly adopt an integrated structure with a fixed angle, and the relative angle of the mounting disc, the protective sleeve and the sensor connector cannot be adjusted. When the installation surface is not flat or vertical, the sensor connector is difficult to face the temperature measurement area, and even interference with the inner wall of the device occurs, which causes the sensor to be unable to fully contact the measured medium, directly affecting the temperature measurement effectiveness. Although some adjustable models can realize angle adjustment, they mostly rely on manual disassembly and reinstallation or additional installation of complex adapter components, which is tedious to operate and has a limited adaptation range.

[0003] In terms of temperature measurement accuracy, scenes such as material stratification in a chemical reaction kettle and uneven distribution of medium flow rate in a pipeline require the sensor to accurately align with a specific temperature measurement point. The sensor connector of the existing fixed-angle transmitter is fixed in direction, and once the installation is completed, it cannot be fine-tuned. Angle deviation may cause the measurement area to deviate from the target point, resulting in temperature data distortion and affecting the accuracy of production process control. In the process of fine chemical synthesis, a temperature measurement error of ±0.5℃ may cause incomplete reaction or decrease in product purity, resulting in economic loss to production. In terms of installation efficiency and cost control, the existing transmitters have strict requirements for installation accuracy, and the mounting disc needs to be completely parallel or perpendicular to the flange of the measured device, otherwise installation deviation may occur, which requires repeated disassembly and adjustment, greatly increasing the installation time and labor cost. At the same time, different models and different installation angles of the measured device often require special models of transmitters, which causes enterprises to need to reserve multiple specifications of devices, increasing the difficulty of device selection and the inventory and procurement costs, which is not conducive to large-scale industrial application and cost control. SUMMARY

[0004] The platinum resistance temperature transmitter aims to provide an angle adjustment function by a take-up device, a connecting wire and an elastic rod, adapt to a non-flat installation environment, accurately align a temperature measuring point, reduce installation difficulty, and further ensure temperature measuring accuracy and equipment versatility.

[0005] To achieve the above object, the present application provides the following technical scheme. A platinum resistance temperature transmitter comprises a meter head, a controller is installed in the meter head, the meter head is provided with a display panel, and a wire tube interface is arranged on one side of the meter head, characterized in that a mounting disc is fixedly connected to the bottom of the meter head, the mounting disc is a disc with a through hole in the center, and a flange mounting hole is arranged on the side close to the outer edge of the mounting disc, a hose protection cylinder is fixedly connected to the bottom side of the mounting disc, the bottom of the hose protection cylinder is provided with a connecting disc, the connecting disc is a disc with a through hole in the center, a protective sleeve is fixedly installed on the bottom of the connecting disc, the protective sleeve and the hose protection cylinder are both through, and a wire tube is arranged in the through space, the top of the wire tube is connected to the meter head, and a sensor connector is fixedly installed at the bottom of the wire tube, the sensor connector passes through the bottom of the protective sleeve, elastic rods are arranged at opposite positions in the hose protection cylinder, the upper end of each elastic rod is fixed to the bottom surface of the mounting disc, and the lower end of each elastic rod is fixedly installed on the connecting disc, a connecting wire is arranged on the connecting disc, one end of the connecting wire is fixed to the connecting disc, and the other end of the connecting wire passes through the mounting disc, a take-up device is fixedly installed on the mounting disc at the position where the connecting wire passes through, and the connecting wire is connected to the take-up device.

[0006] A boss is arranged at the annular protrusion of each expansion ring on the inner side of the hose protection cylinder, the bosses are arranged in two rows in a vertical manner and are located at opposite sides in the hose protection cylinder, and the bosses are arranged in a diagonal direction from the elastic rods, a through hole is arranged in the boss in a top-to-bottom manner, a spring is arranged between the bosses in a top-to-bottom manner, the spring is fixedly connected to the bosses in a top-to-bottom manner, and the spring surrounds the center of the through hole, and the connecting wire passes through the through hole.

[0007] A hose is arranged in the through hole in a top-to-bottom manner, the hose at the lower part of each boss is close to the hose at the upper part of the boss on the lower side, the hole diameter of the hose is suitable for insertion and cooperation, and the connecting wire passes through the hose.

[0008] A plurality of guide shafts are arranged around the through hole on the inner side of the protective sleeve, expansion motors are fixedly installed on both sides of the connecting disc in the side of the guide shafts, and the expansion direction of the shaft body of the expansion motor is consistent with the extension direction of the guide shafts. A telescopic disc is sleeved on the guide shaft, the telescopic disc is an annular disc body, the inner ring of the telescopic disc is fixedly installed at the bottom of the sensor connector, guide holes corresponding in size and position to the guide shafts are arranged on the annular body of the telescopic disc, and the telescopic disc is sleeved and installed on the guide shaft through the guide holes. The top of the shaft body of the expansion motor is fixedly installed on the telescopic disc.

[0009] The protective sleeve is pointed near the sensor joint end, and the pointed end is provided with an opening, and the sensor joint is passed out of the opening.

[0010] The flange mounting hole of the mounting disc is nested with an elastic sealing washer, the outer diameter of the elastic sealing washer is matched with the inner diameter of the flange mounting hole, and the inner circle is provided with anti-skid tooth pattern.

[0011] The take-up device is linked and controlled by the controller, and when one side of the take-up device is tightened, the other side of the take-up device is in a relaxed state.

[0012] The inner wall of the lead tube is attached with a metal shielding layer, the metal shielding layer is made of copper foil material, one end of the metal shielding layer is electrically connected with the grounding terminal inside the probe head, and the other end extends to the metal shell of the sensor joint and is in conduction with the metal shell.

[0013] The inner wall of the hose is coated with a polytetrafluoroethylene lubricating coating, and the coating thickness is 0.05-0.1mm.

[0014] The pointed part of the protective sleeve adopts a bimetallic composite structure, the inner layer is made of stainless steel material, and the outer layer is made of hastelloy material; the part where the sensor joint passes through the opening of the pointed end is sleeved with a corrosion-resistant sealing sleeve.

[0015] Its working mechanism is that the platinum resistance element built-in the sensor joint is in contact with the measured environment to convert temperature change into electrical signal, the bimetallic structure at the tip of the protective sleeve is isolated from the corrosion-resistant sealing sleeve to ensure stable collection; the electrical signal is transmitted to the meter head through the lead pipe, the copper foil shielding layer on the inner wall of the lead pipe is connected to the ground terminal of the meter head, and the conduction of the metal shell of the sensor joint forms an anti-interference closed loop to avoid signal distortion; when the temperature measurement depth needs to be adjusted, the telescopic motor in the protective sleeve drives the telescopic disc to move along the guide shaft, pushing the sensor joint to extend or retract; if fine adjustment of the angle or height is needed, the wire collector on the mounting disc is linked to control, one side tightens the connection line, the other side loosens the connection line to pull the connection disc to move, this angle adjustment function can adapt to the non-flat and non-vertical installation environment of the measured equipment surface in industrial scenes, such as tilt, protrusion or space limitation, so that the protective sleeve drives the sensor joint to adjust the direction flexibly to ensure sufficient contact with the measured medium, and also enables the sensor joint to accurately aim at the target temperature measurement area such as the specific cross-section of the inner wall of the pipeline or the flowing layer of the material in the reaction kettle, reducing the temperature measurement error caused by angle deviation, at the same time, it does not strictly require that the mounting disc and the measured equipment flange are completely parallel or vertical, which makes up for the slight positioning deviation during installation to reduce rework and improve the versatility of the transmitter; the spring inside the soft tube protection cylinder provides reset support as the connection disc moves and deforms, and the connection line passes through the soft tube with a polytetrafluoroethylene lubricating coating to reduce wear; during installation, the elastic sealing washer in the flange mounting hole of the mounting disc ensures stable fixation and sealing, and after the meter head receives the signal, it is processed through the internal circuit to display the temperature on the display panel in real time, and data remote transmission and monitoring can be realized through the lead pipe interface.

[0016] Compared with the prior art, the beneficial effects of the present application are: 1. Adapt to complex installation environment: For the non-flat and non-vertical conditions such as tilt, protrusion or space limitation of the measured equipment surface in industrial scenes, angle adjustment can be achieved through the cooperative operation of the wire collector, connection line and elastic rod to drive the protective sleeve and sensor joint to adjust the direction flexibly, avoiding the situation that the sensor cannot face the temperature measurement area due to the inadaptability of the installation surface, and ensuring that the sensor is in full contact with the measured medium.

[0017] 2. Improve the accuracy of temperature measurement point: In the case of precise temperature measurement of the specific cross-section of the inner wall of the pipeline or the flowing layer of the material in the reaction kettle, angle fine adjustment can enable the sensor joint to accurately aim at the target temperature measurement point, effectively reducing the temperature measurement error caused by angle deviation, and significantly improving the accuracy and reliability of temperature data.

[0018] 3. Reduce installation adaptation difficulty and cost: There is no strict requirement that the mounting disc and the measured equipment flange are completely parallel or vertical, and the slight positioning deviation during installation can be directly made up through angle adjustment to reduce installation rework; at the same time, it can adapt to different types and different installation angles of the measured equipment, greatly improving the versatility of the transmitter in multiple scenes and reducing the equipment selection and installation cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 This is a three-dimensional structural diagram of a platinum resistance temperature transmitter according to the present invention; Fig. 2 This is a cross-sectional view of the structure of a protective sleeve for a platinum resistance temperature transmitter hose according to the present invention. Fig. 3 This is a cross-sectional view of a protective sleeve structure for a platinum resistance temperature transmitter according to the present invention. In the diagram: 1. Meter head, 2. Mounting plate, 3. Hoses protective sleeve, 4. Connecting plate, 5. Protective sleeve, 6. Conduit, 7. Sensor connector, 8. Retractor, 11. Display panel, 12. Conduit interface, 21. Flange mounting hole, 31. Elastic rod, 32. Boss, 33. Through hole, 34. Spring, 35. Hoses, 36. Connecting wire, 51. Guide shaft, 52. Telescopic motor, 53. Telescopic plate, 54. Guide hole. Detailed Implementation

[0020] The technical solutions of the present invention will now be described in detail with reference to the accompanying drawings.

[0021] like Figs. 1-3 As shown, a platinum resistance temperature transmitter includes a meter head (1), a controller installed inside the meter head (1), a display panel (11) provided on the meter head (1), and a conduit interface (12) provided on one side thereon. The meter head (1) is characterized by a mounting plate (2) fixedly connected to its bottom. The mounting plate (2) is a circular disc with a through-center, and a flange mounting hole (21) is provided near its outer edge. A hose protection sleeve (3) is fixedly connected to the bottom of the mounting plate (2). A connecting plate (4) is provided at the bottom of the hose protection sleeve (3). The connecting plate (4) is a circular disc with a through-center. A protective sleeve (5) is fixedly installed at the bottom of the connecting plate (4). The protective sleeve (5) and the hose protection sleeve (3) are both internally connected. The space through which the conduit is provided is provided with a conduit (6). The top of the conduit (6) is connected to the meter head (1), and the bottom is fixedly installed with a sensor connector (7). The sensor connector (7) passes through the bottom of the protective sleeve (5). The flexible protective sleeve (3) is provided with elastic rods (31) at opposite positions on both sides. The upper end of the elastic rod (31) is fixed to the bottom surface of the mounting plate (2), and the lower end is fixedly installed on the connecting plate (4). The connecting plate (4) is provided with a connecting line (36). One end of the connecting line (36) is fixed to the connecting plate (4), and the other end passes through the mounting plate (2). The mounting plate (2) is fixedly installed with a take-up device (8) at the position where the connecting line (36) passes through. The connecting line (36) is connected to the take-up device (8).

[0022] The annular protrusion of each telescopic ring inside the hose protection cylinder (3) is provided with a boss (32), the boss (32) is two rows, vertically arranged, and located on the opposite sides inside the hose protection cylinder (3), and is diagonally arranged with the elastic rod (31); the boss (32) is provided with a through hole (33) penetrating from top to bottom, the upper and lower bosses (32) are fixedly connected with the spring (34), and the spring (34) is surrounded around the center of the through hole (33); the connecting line (36) penetrates through the through hole (33).

[0023] The through hole (33) is provided with a hose (35) from top to bottom, the lower hose (35) of each boss (32) is close to the upper hose (35) of the lower boss (32), and the hole diameter is suitable for insertion and cooperation, and the connecting line (36) penetrates through the hose (35).

[0024] The through hole (33) is provided with a hose (35) from top to bottom, the lower hose (35) of each boss (32) is close to the upper hose (35) of the lower boss (32), and the hole diameter is suitable for insertion and cooperation, and the connecting line (36) penetrates through the hose (35). The guide shaft (51) is provided with a through hole (33) penetrating from top to bottom, the upper and lower bosses (32) are fixedly connected with the spring (34), and the spring (34) is surrounded around the center of the through hole (33); the connecting line (36) penetrates through the through hole (33). The guide shaft (51) is provided with a through hole (33) penetrating from top to bottom, the upper and lower bosses (32) are fixedly connected with the spring (34), and the spring (34) is surrounded around the center of the through hole (33); the connecting line (36) penetrates through the through hole (33).

[0025] The protection sleeve (5) is close to the sensor connector (7) end, which is a sharp end, and the sharp end is provided with an opening, and the sensor connector (7) penetrates out of the opening.

[0026] The flange mounting hole (21) of the mounting disc (2) is nested with an elastic sealing gasket, the outer diameter of the elastic sealing gasket is matched with the inner diameter of the flange mounting hole (21), and the inner circle is provided with an anti-skid tooth pattern.

[0027] The take-up device (8) is linked and controlled by the controller, when one side of the take-up device (8) is tightened, the other side of the take-up device (8) is in a relaxed state.

[0028] The inner wall of the wire tube (6) is attached with a metal shielding layer, the metal shielding layer is made of copper foil material, one end of the metal shielding layer is electrically connected with the grounding terminal inside the probe head (1), and the other end extends to the metal shell of the sensor connector (7) and is in conduction with the metal shell.

[0029] The inner wall of the hose (35) is coated with a polytetrafluoroethylene lubricating coating, and the coating thickness is 0.05-0.1mm.

[0030] The tip-shaped part of the protective sleeve (5) adopts a bimetallic composite structure, the inner layer is made of stainless steel material, and the outer layer is made of hastelloy material; the sensor joint (7) is sleeved with a corrosion-resistant sealing sleeve at the part passing through the tip opening.

[0031] In the specific implementation of the platinum resistance temperature transmitter, first, the flange mounting hole (21) of the mounting disc (2) is aligned with the flange interface of the measured equipment such as a chemical reaction kettle, the bolt is inserted and tightened, the EPDM elastic sealing washer in the hole is extruded to fill the gap, the inner ring anti-slip knurl prevents the bolt from loosening, and there is no need to strictly calibrate the parallelism of the mounting disc and the flange; if the installation surface has a 15° inclination, through the built-in PLC controller command take-up device (8) in the meter head (1), the lower take-up device tightens the connecting line (36), and the upper take-up device relaxes, the connecting line pulls the connecting disc (4) to rotate around the elastic rod (31), the hose protection cylinder (3) deforms, the internal spring (34) stretches and resets, the connecting line slides in the hose (35) coated with polytetrafluoroethylene to prevent wear and tear, until the sensor joint (7) is aligned with the material mixing layer; when it needs to be inserted into the material layer by 50cm, the controller sets the parameters, the telescopic motor (52) shaft body is extended, drives the telescopic disc (53) to move downward along the guide shaft (51), and pushes the sensor joint to extend from the tip of the protective sleeve (5) to the set depth and stop. In actual operation, the platinum resistance element of the sensor joint converts the temperature into an electrical signal, which is transmitted through the lead tube (6), the copper foil shielding layer on the inner wall filters electromagnetic interference, and the signal distortion degree is ≤±0.1%, the processed data is displayed on the display panel (11) with ±0.2℃ precision, and the signal is also transmitted to the monitoring system through the lead tube interface (12); when the material is layered, the angle is readjusted, and the time consumption is less than 30 seconds, the efficiency is improved by 80% compared with the existing one, the temperature measuring depth is adjusted by the telescopic motor, and the guide shaft ensures that the moving deviation is less than 0.5mm. When maintaining, check the wear of the connecting line and the corrosion of the sealing sleeve, the service life of the connecting line is more than 3 years due to the hose coating; when replacing the small diameter pipeline, the take-up device tightens the connecting line to reduce the connecting disc, and the telescopic motor collects the sensor joint, without the need to replace the equipment, the cost is greatly reduced.

Claims

1. A platinum resistance temperature transmitter comprising a meter head (1) in which a controller is mounted, a display panel (11) being provided on the meter head (1) and a lead-through conduit interface (12) being provided on one side of the meter head (1), characterized in that The table head (1) bottom fixedly connected to the mounting disc (2), the mounting disc (2) is through the center of the disc, and its flange mounting hole (21) is provided near the outer edge side, the mounting disc (2) bottom side fixedly connected to the hose protection cylinder (3), the hose protection cylinder (3) bottom is provided with a connecting disc (4), the connecting disc (4) is through the center of the disc, the connecting disc (4) bottom fixedly installed protective sleeve (5), the protective sleeve (5) and the inside of the hose protection cylinder (3) are all through, and the through space is provided with a wire tube (6), the wire tube (6) is of flexible material, the top is connected to the table head (1), the bottom is fixedly installed sensor connector (7), the sensor connector (7) passes through the bottom of the protective sleeve (5), the hose protection cylinder (3) is provided with elastic rod (31) on both sides of the inside, the elastic rod (31) upper end is fixed to the mounting disc (2) bottom, the lower end is fixedly installed on the connecting disc (4), the connecting disc (4) is provided with a connecting line (36), one end of the connecting line (36) is fixed to the connecting disc (4), the other end passes through the mounting disc (2); The mounting disc (2) is fixedly installed on the connecting line (36) through the position and is connected to the wire winding device (8), and the connecting line (36) is connected to the wire winding device (8).

2. A platinum resistance temperature transmitter as claimed in claim 1, wherein, The inside of the hose protection cylinder (3) is provided with a boss (32) at the annular protrusion of each expansion ring, the boss (32) is two rows, arranged vertically, and located on the opposite sides of the hose protection cylinder (3), and is diagonally arranged with the elastic rod (31); The boss (32) is provided with a through hole (33) passing through the upper and lower, the upper and lower bosses (32) are provided with a spring (34), the spring (34) is fixedly connected with the boss (32) on the upper and lower, and is surrounded by the through hole (33) center, the through hole (33) passes through the connecting line (36).

3. A platinum resistance temperature transmitter as claimed in claim 2, wherein, The through hole (33) is provided with a hose (35) on the upper and lower, the lower part of each boss (32) is close to the upper part of the lower side of the boss (32), and the hole diameter is suitable for insertion and cooperation, the connecting line (36) passes through the hose (35) at the same time.

4. A platinum resistance temperature transmitter as set forth in claim 1 wherein, The through hole (33) is provided with a boss (32) at the annular protrusion of each expansion ring, the boss (32) is two rows, arranged vertically, and located on the opposite sides of the hose protection cylinder (3), and is diagonally arranged with the elastic rod (31); The boss (32) is provided with a through hole (33) passing through the upper and lower, the upper and lower bosses (32) are provided with a spring (34), the spring (34) is fixedly connected with the boss (32) on the upper and lower, and is surrounded by the through hole (33) center, the through hole (33) passes through the connecting line (36). The boss (32) is provided with a boss (32) at the annular protrusion of each expansion ring, the boss (32) is two rows, arranged vertically, and located on the opposite sides of the hose protection cylinder (3), and is diagonally arranged with the elastic rod (31); The boss (32) is provided with a through hole (33) passing through the upper and lower, the upper and lower bosses (32) are provided with a spring (34), the spring (34) is fixedly connected with the boss (32) on the upper and lower, and is surrounded by the through hole (33) center, the through hole (33) passes through the connecting line (36). The boss (32) is provided with a boss (32) at the annular protrusion of each expansion ring, the boss (32) is two rows, arranged vertically, and located on the opposite sides of the hose protection cylinder (3), and is diagonally arranged with the elastic rod (31); The boss (32) is provided with a through hole (33) passing through the upper and lower, the upper and lower bosses (32) are provided with a spring (34), the spring (34) is fixedly connected with the boss (32) on the upper and lower, and is surrounded by the through hole (33) center, the through hole (33) passes through the connecting line (36).

5. A platinum resistance temperature transmitter as set forth in claim 1 wherein, ​ 6. A platinum resistance temperature transmitter as set forth in claim 1 wherein, The flange mounting hole (21) of the mounting disc (2) is nested with an elastic sealing washer, the outer diameter of the elastic sealing washer is matched with the inner diameter of the flange mounting hole (21), and the inner circle is provided with anti-skid tooth pattern.

7. A platinum resistance temperature transmitter as set forth in claim 1 wherein, The take-up device (8) is linkage controlled by the controller, and when one side take-up device (8) is tightened, the other side take-up device (8) is in a relaxed state.

8. A platinum resistance temperature transmitter as set forth in claim 1 wherein, The inner wall of the wire tube (6) is attached with a metal shielding layer, the metal shielding layer is made of copper foil material, one end of the metal shielding layer is electrically connected with a grounding terminal in the surface head (1), and the other end extends to the metal shell of the sensor connector (7) and is in conduction with the same.

9. A platinum resistance temperature transmitter as set forth in claim 1 wherein, The inner wall of the hose (35) is coated with a polytetrafluoroethylene lubricating coating.

10. A platinum resistance temperature transmitter as set forth in claim 1 wherein, The tip-shaped part of the protective sleeve (5) adopts a bimetallic composite structure, the inner layer is made of stainless steel material, and the outer layer is made of hastelloy material; the sensor connector (7) is sleeved with a corrosion-resistant sealing sleeve at the part passing through the tip opening.

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