Weighing sensor device applied to high-temperature environment
By designing a double-layer enclosed shell and an eddy current cooling system on the load cell, the problem of sensor instability under high temperature conditions was solved, and the sensor achieved stable and accurate measurement under high temperature conditions.
Patent Information
- Application Number
- CN202520350199.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-03-03
AI Technical Summary
Existing load cells are unstable in high-temperature environments, resulting in inaccurate output values and overload alarms, which cannot meet the high-temperature metering requirements of industries such as chemical and mining.
The sensor employs a double-layer enclosed housing design, combined with an eddy current cooling system. This system isolates the sensor from external high temperatures by using cold airflow and keeps the sensor within its normal operating temperature range. The eddy current tube separates the hot and cold airflows for heat exchange, ensuring the stability and accuracy of the sensor.
It effectively isolates external heat, reduces the impact of temperature fluctuations on the sensor, improves the stability and accuracy of measurement results, avoids overload alarms, provides physical protection, and simplifies wiring.
Smart Images
Figure CN223710814U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to weighing sensor technical field, concretely relates to a weighing sensor device for high temperature environment. BACKGROUND
[0002] At present, the ordinary weighing sensor is not suitable for long-term use in high temperature environment, because the working principle of the ordinary weighing sensor is that the elastic body micro-strain is caused by external force, and then the bridge resistance changes, thereby causing the voltage output to change, wherein the elastic body and the strain gauge are only a force sensitive carrier, and for the weighing sensor for high temperature environment, the external force will cause the change of the voltage output, and when the surrounding temperature is higher than a certain range, the thermal expansion of the elastic body will cause the micro-strain of the strain gauge, thereby causing the change of the bridge resistance, and finally the voltage output will also change.
[0003] When the equipment with weighing sensor is used to measure and convey in chemical industry, mineral industry, metallurgy and other industries, the output value of the sensor is unstable and inaccurate and overload alarm often occur due to the high environmental temperature and material temperature, which causes heat conduction to the weighing sensor, and the deviation generated by the several hundred tons of measurement demand in chemical industry and mineral industry will cause loss of property.
[0004] The working temperature range of the existing weighing sensor is-40~+65 DEG C, and the existing sensor installation mode is mostly bare installation on the weighing module, which cannot effectively dissipate heat, and the output value is often unstable and inaccurate and overload alarm occurs due to the high temperature.
[0005] In view of the above, it is necessary to provide a weighing sensor device for high temperature environment to solve the above problems. INVENTION CONTENTS
[0006] The utility model discloses a weighing sensor device for high temperature environment, which overcomes the defects in the prior art and provides a weighing sensor device for high temperature environment.
[0007] To achieve the above object, the technical scheme of the utility model is as follows: a weighing sensor device for high temperature environment, comprising a weighing sensor, the weighing sensor is arranged in a closed shell structure, the shell structure is a double-layer structure, an accommodating cavity is formed in the double-layer structure, the accommodating cavity is used for arranging the weighing sensor and accessories, an intermediate layer is formed between the inner wall and the outer wall of the double-layer structure, the intermediate layer is connected with an eddy current refrigeration system, and the cold air flow of the eddy current refrigeration system enters the intermediate layer to isolate the external high temperature.
[0008] Further, the shell structure comprises a double-layer shell and a double-layer cover plate, the double-layer cover plate is mounted on the upper side opening of the double-layer shell, the upper side opening of the double-layer shell is communicated to the containing cavity for mounting and arranging the weighing sensor and its accessories; the double-layer cover plate is buckled to form a seal on the upper side opening, and the middle layer of the double-layer shell is communicated with the double-layer cover plate.
[0009] Further, the double-layer shell is further provided with an air inlet pipe joint and an air outlet pipe joint, the air inlet pipe joint and the air outlet pipe joint are arranged on the outer layer of the double-layer shell, and the air inlet pipe joint and the air outlet pipe joint are communicated to the middle layer.
[0010] Further, the vortex refrigeration system comprises a connecting pipeline, and a pressure regulating filter, an electromagnetic valve and a vortex pipe are sequentially arranged on the connecting pipeline, and the connecting pipeline is connected to the air inlet pipe joint.
[0011] Further, the bottom of the double-layer shell is provided with a drain port, and the drain port is communicated to the middle layer.
[0012] Further, compressed air is introduced into the vortex refrigeration system.
[0013] Further, the containing cavity is further provided with a temperature sensor, and the double-layer shell is provided with a temperature sensor outlet and a weighing sensor outlet.
[0014] Further, the temperature sensor outlet and the weighing sensor outlet are both provided with a garden head interface.
[0015] The advantages and beneficial effects of the weighing sensor device applied to a high-temperature environment are as follows: the weighing sensor device applied to a high-temperature environment is combined with a double-layer structure and a vortex refrigeration system, external heat is effectively isolated, and the heat generated inside is taken away by cold air flow, so that the weighing sensor can still maintain a normal working temperature range in a high-temperature environment. Due to the adoption of an efficient cooling mechanism, the influence of temperature fluctuation caused by heat conduction on the output of the sensor is reduced, thereby improving the stability and accuracy of the measurement result and avoiding the problem of overload alarm. The closed shell design not only prevents the direct action of external high temperature on the sensor, but also provides physical protection, reduces the influence of external factors such as dust and moisture on the performance of the sensor. The design of the double-layer cover plate facilitates disassembly and reinstallation, and facilitates regular inspection or replacement of parts. In addition, all interfaces are designed in a standardized manner (such as a garden head interface), which simplifies wiring work and improves the safety and reliability of the connection. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a structural schematic view of the weighing sensor device applied to a high-temperature environment of the utility model;
[0017] Figure 2It is the pipe connection schematic drawing of the weighing sensor device applied to high temperature environment of the utility model;
[0018] Figure 3 It is the longitudinal section schematic drawing of the weighing sensor device applied to high temperature environment of the utility model;
[0019] Figure 4 It is the internal structure schematic drawing of the weighing sensor device applied to high temperature environment of the utility model;
[0020] In the drawing: 1, air inlet pipe joint; 2, air outlet pipe joint; 3, temperature sensor outlet; 4, weighing sensor outlet; 5, double-layer cover plate; 6, double-layer shell; 7, temperature sensor; 8, weighing sensor; 9, pressure regulating filter; 10, electromagnetic valve; 11, vortex tube. DETAILED DESCRIPTION
[0021] The specific implementation of the utility model is further described below in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical scheme of the utility model, and cannot limit the protection scope of the utility model.
[0022] A weighing sensor device applied to high temperature environment, as shown in Figures 1-4 The weighing sensor 8 is arranged in a closed shell structure, and the shell structure is a double-layer structure, specifically, the shell structure includes a double-layer shell 6 and a double-layer cover plate 5, the double-layer cover plate 5 is installed on the upper side opening of the double-layer shell 6, and the double-layer cover plate 5 is designed to be convenient to disassemble and reinstall, so that periodic inspection or replacement of parts is facilitated.
[0023] The upper side opening of the double-layer shell 6 is communicated to a containing cavity for mounting and arranging the weighing sensor 8 and accessories thereof; the double-layer cover plate 5 is buckled on the upper side opening to form a seal, and the middle layer of the double-layer shell 6 and the double-layer cover plate 5 is communicated. The closed shell design not only prevents the external high temperature from directly acting on the sensor, but also provides physical protection, reduces the influence of external factors such as dust and moisture on the performance of the sensor.
[0024] The double-layer structure forms a containing cavity inside, and the containing cavity is used for arranging the weighing sensor 8 and accessories; an intermediate layer is formed between the inner wall and the outer wall of the double-layer structure, as shown in the figure, when the double-layer cover plate 5 is buckled on the double-layer shell 6, the inner layer of the double-layer cover plate 5 is pressed on the inner layer opening of the double-layer shell 6, and the outer layer of the double-layer cover plate 5 is pressed on the outer layer opening of the double-layer shell 6, it can be understood that a sealing gasket can be arranged at the pressing joint of the opening, then the sealing is fixed by using bolts, and the middle layer of the double-layer cover plate 5 is communicated.
[0025] The accessory of the weighing sensor 8 includes the temperature sensor 7, specifically, the temperature sensor 7 is arranged in the accommodating cavity, and the double-layer shell 6 is provided with the temperature sensor 7 outlet 3 and the weighing sensor 8 outlet 4. In addition, all interfaces are designed in a standardized manner, specifically, a gland joint is adopted, and the temperature sensor 7 outlet 3 and the weighing sensor 8 outlet 4 are both designed in a gland joint. In this way, wiring work is simplified, and the safety and reliability of connection are improved.
[0026] The intermediate layer is connected with a vortex refrigeration system, and cold air of the vortex refrigeration system enters the intermediate layer to insulate the outside high temperature.
[0027] The working principle is as follows: the vortex tube 11 refrigeration is a method of obtaining refrigeration by means of vortex tube 11 to make high-speed airflow vortex to separate cold and hot airflows, and the cold airflow is used to obtain refrigeration. The weighing sensor 8 is installed in the double-layer shell 6, the cold air of the vortex tube 11 passes through the intermediate layer from the gas inlet to the gas outlet through the gas inlet of the double-layer shell 6, and the temperature sensor 7 is arranged in the shell to detect the temperature of the shell itself. The temperature sensor 7 feeds back the temperature to the control system in real time, the control system controls the opening and closing of the electromagnetic valve 10 of the vortex tube 11, so that the weighing sensor 8 in the double-layer shell always maintains in a normal working temperature range, so as to control the temperature of the internal environment of the shell.
[0028] Specifically, the double-layer shell 6 is further provided with a gas inlet pipe joint 1 and a gas outlet pipe joint 2, the gas inlet pipe joint 1 and the gas outlet pipe joint 2 are arranged on the outer layer of the double-layer shell 6, and the gas inlet pipe joint 1 and the gas outlet pipe joint 2 are both connected to the intermediate layer. The vortex refrigeration system includes a connecting pipeline and a pressure regulating filter 9, an electromagnetic valve 10 and a vortex tube 11 arranged in sequence on the connecting pipeline, and the connecting pipeline is connected to the gas inlet pipe joint 1. Compressed air is introduced into the vortex refrigeration system.
[0029] The specific working mode is as follows:
[0030] When the temperature sensor 7 senses that the sensor temperature is too high, the control system opens the electromagnetic valve 10, the compressed air enters the vortex tube 11 through the pressure regulating filter 9 and the electromagnetic valve 10, the vortex tube 11 separates cold and hot airflows, the hot airflow is discharged from the upper end of the vortex tube 11 to the atmosphere, and the cold airflow is discharged from the side of the vortex tube 11 to enter the gas inlet of the double-layer shell 6 for heat exchange and then discharged from the gas outlet of the double-layer shell 6.
[0031] When the temperature sensor 7 senses that the sensor temperature is in a normal working temperature, the control system closes the electromagnetic valve 10 to stop cooling.
[0032] Further, the bottom of the double-layer shell 6 is provided with a drain port, and the drain port is connected to the intermediate layer. The generated condensed water is discharged through the drain port.
[0033] The above merely is the preferred implementation manner of the present application, and it should be noted that, for the ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.
Claims
1. A load cell arrangement for use in a high temperature environment comprising a load cell (8), characterised in that, The weighing sensor (8) is arranged in a closed housing structure, the housing structure is a double-layer structure, the inside of the double-layer structure forms a containing cavity for arranging the weighing sensor (8) and accessories; the intermediate layer between the inner wall and the outer wall of the double-layer structure is connected with an eddy current refrigeration system, and cold air of the eddy current refrigeration system enters the intermediate layer to insulate the outside high temperature.
2. The load cell device for use in high temperature environments of claim 1, wherein, The housing structure comprises a double-layer housing (6) and a double-layer cover plate (5), the double-layer cover plate (5) is mounted on the upper opening of the double-layer housing (6), the upper opening of the double-layer housing (6) is communicated to the containing cavity for mounting the weighing sensor (8) and accessories; the double-layer cover plate (5) is buckled to form a seal on the upper opening, and the intermediate layer of the double-layer housing (6) and the double-layer cover plate (5) is communicated.
3. The load cell device for use in high temperature environments of claim 2, wherein, The double-layer housing (6) is further provided with an air inlet pipe joint (1) and an air outlet pipe joint (2), the air inlet pipe joint (1) and the air outlet pipe joint (2) are arranged on the outer layer of the double-layer housing (6), and the air inlet pipe joint (1) and the air outlet pipe joint (2) are communicated to the intermediate layer.
4. The load cell device for use in high temperature environments of claim 3, wherein, The eddy current refrigeration system comprises a connecting pipeline and a pressure regulating filter (9), an electromagnetic valve (10) and an eddy current pipe (11) arranged in sequence on the connecting pipeline, and the connecting pipeline is connected to the air inlet pipe joint (1).
5. The load cell device for use in high temperature environments of claim 4, wherein, The bottom of the double-layer housing (6) is provided with a drain port, and the drain port is communicated to the intermediate layer.
6. The load cell device for use in high temperature environments of claim 5, wherein, Compressed air is introduced into the eddy current refrigeration system.
7. The load cell device for use in high temperature environments of claim 3, wherein, The containing cavity is further provided with a temperature sensor (7), and the double-layer housing (6) is provided with a temperature sensor (7) outlet (3) and a weighing sensor (8) outlet (4).
8. The load cell device for use in high temperature environments of claim 7, wherein, The temperature sensor (7) outlet (3) and the weighing sensor (8) outlet (4) adopt a garden head interface.