High-precision temperature reed pipe sensor

Abstract

The utility model discloses a high-precision temperature reed pipe sensor, which comprises a shell, a circuit board and a reed pipe are arranged inside the shell, the reed pipe is fixedly arranged outside the circuit board, the outside of the reed pipe is fixedly connected with a probe rod through a copper washer, the inside of the shell is slidably connected with a connecting column, the bottom end of the connecting column is fixedly connected with a sliding block, and the sliding block is fixedly connected with a spring. A guide groove block is slidably connected to the exterior of the sliding block, a column is slidably connected to the interior of the sliding block through a clamping groove, a connecting rod is fixedly connected to the side surface of the column, a movable column is fixedly connected to the lower surface of the sliding block, and a permanent magnet is fixedly connected to the bottom end of the movable column. Through the structure, the sliding block is driven by the connecting column to enable the permanent magnet to move, and the clamping groove of the sliding block is fixed through the connecting rod, so that the magnetic field change triggered by the temperature can be simulated, whether the action threshold value of the reed switch meets the design standard or not can be verified, and the reliability of an alarm loop can be conveniently tested when the thermistor does not reach the preset temperature.

Description

TECHNICAL FIELD

[0001] The utility model relates to temperature dry reed sensor technical field, especially a kind of high-precision temperature dry reed sensor. BACKGROUND

[0002] High-precision temperature dry reed sensor is a kind of accurate equipment for measuring temperature, is built based on thermosensitive element, reflects temperature change by resistance change, the sensor has high precision, high stability and fast response function, applicable to industrial automation, such as Chinese patent discloses a dry reed sensor, its application number is: 202221382889.0, it can avoid stress generated when screwing as far as possible, cause stress concentration to damage dry reed body, thereby prolong the service life of dry reed body, and optimize the stability of dry reed assembly use, make it more reliable, but if not setting alarm loop, cannot be verified by electric signal feedback whether dry reed is correctly operated under set threshold, possibly leading to false triggering or failure, affect system stability. SUMMARY

[0003] The utility model aims at at least solving one of the technical problems existing in the prior art, provide a kind of high-precision temperature dry reed sensor, sliding block is driven by connecting column to make live permanent magnet displacement, and the clamping groove of sliding block is fixed by connecting rod, so as to simulate the magnetic field change of temperature trigger, verify whether the action threshold of dry reed meets design standard, when thermistor does not reach preset temperature, it is convenient to test the reliability of alarm loop.

[0004] The utility model also provides a kind of high-precision temperature dry reed sensor with the above, including: shell, the inside of the shell is provided with circuit board and dry reed, the dry reed is fixedly installed at the outside of circuit board, the outside of the dry reed is fixedly connected with probe rod by copper washer, the inside of the shell is provided with waterproof pad;The inside of the shell is slidably connected with connecting column, the bottom end of the connecting column is fixedly connected with sliding block, the outside of the sliding block is slidably connected with guide groove block, the side surface of the guide groove block is fixedly connected with shell, the inside of the sliding block is provided with clamping groove, the inside of the clamping groove is slidably connected with column body, the side surface of the column body is fixedly connected with connecting rod, the bottom end of the connecting rod is rotatably connected with guide groove block, the lower surface of the sliding block is fixedly connected with movable column, the bottom end of the movable column is fixedly connected with permanent magnet. Sliding block is driven by connecting column to make live permanent magnet displacement, and the clamping groove of sliding block is fixed by connecting rod, so as to simulate the magnetic field change of temperature trigger, verify whether the action threshold of dry reed meets design standard, when thermistor does not reach preset temperature, it is convenient to test the reliability of alarm loop.

[0005] The utility model discloses a high accuracy temperature dry reed tube sensor, the outside of permanent magnet is located in the reed side when working, the reed contact of dry reed tube is disconnected in normal state. Reed contact is disconnected in no magnetic field, ensure that the equipment power off automatic cut-off circuit, avoid the risk of false triggering.

[0006] The utility model discloses a high accuracy temperature dry reed tube sensor, the outside of shell is provided with insulating layer, and the insulating layer is located between copper washer and dry reed tube. Fluoropolymer insulating layer can prevent acid alkali medium through copper washer gap erosion dry reed tube glass package, and simultaneously inhibit radial heat diffusion.

[0007] The utility model discloses a high accuracy temperature dry reed tube sensor, the inside of probe rod is provided with thermistor, and the thermistor is electrically connected with circuit board through wire, and the dry reed tube is electrically connected with alarm, and the alarm is installed on the outside of shell. When temperature is over limit, circuit board drives electromagnetic coil to produce magnetic field and makes dry reed tube reed close, and directly connects external alarm circuit.

[0008] The utility model discloses a high accuracy temperature dry reed tube sensor, the upper top wall of guide groove block is fixedly connected with spring, and the bottom of spring is fixedly connected with sliding block, and the spring has two and is distributed symmetrically, and two spring are located on the both sides of connecting column. Through spring, connecting column can be pressed again, and sliding block can be driven to reset quickly.

[0009] The utility model discloses a high accuracy temperature dry reed tube sensor, the inside of waterproof pad is provided with buffer pad, and the buffer pad is located on the outside of dry reed tube. Buffer pad adopts silicon rubber composite material, can attenuate vibration energy, prevents dry reed tube reed from producing damage due to vibration.

[0010] The utility model discloses a high accuracy temperature dry reed tube sensor, the connecting place of probe rod and shell is provided with sealing ring, and the sealing ring is closely connected with shell. Sealing ring can effectively block the outside dust, impurity and enter the inside of shell, avoids the sensitivity of dry reed tube contact or temperature sensing element to be influenced.

[0011] The utility model discloses a high accuracy temperature dry reed tube sensor, the top of connecting column is fixedly connected with press down block, and the outside of press down block is provided with antiskid part. Through press down block, connecting column can drive sliding block to move, thereby driving permanent magnet to move.

[0012] Beneficial effect: compared with the prior art, the new high-precision temperature dry reed sensor can simulate the magnetic field change triggered by temperature, verify whether the action threshold of the dry reed meets the design standard, and facilitate the reliability test of the alarm loop when the thermistor does not reach the preset temperature. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model is further illustrated below in combination with the drawings and examples.

[0014] Figure 1 It is a complete structure diagram of the high-precision temperature dry reed sensor of the utility model.

[0015] Figure 2 It is a sectional structure diagram of the high-precision temperature dry reed sensor of the utility model.

[0016] Figure 3 It is an internal structure diagram of the high-precision temperature dry reed sensor of the utility model.

[0017] Figure 4 It is a shell structure diagram of the high-precision temperature dry reed sensor of the utility model.

[0018] LEGEND:

[0019] 1, shell; 2, circuit board; 3, dry reed; 4, copper washer; 5, probe rod; 6, waterproof pad; 7, connecting column; 8, sliding block; 9, guide groove block; 10, clamping groove; 11, column body; 12, pressing block; 13, connecting rod; 14, movable column; 15, permanent magnet; 16, insulating layer; 17, thermistor; 18, spring; 19, buffer pad; 20, sealing ring; 21, alarm. DETAILED DESCRIPTION

[0020] This part will describe the specific embodiments of the utility model in detail, and the preferred embodiments of the utility model are shown in the drawings. The drawings are used to supplement the description of the text part in the form of graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model. However, it cannot be understood as a limitation on the protection scope of the utility model.

[0021] REFERENCE Figures 1-4The utility model discloses a high accuracy temperature dry reed sensor, it includes: casing 1, the inside of casing 1 is provided with circuit board 2 and dry reed 3, dry reed 3 is fixedly installed at the outside of circuit board 2, the outside of dry reed 3 is fixedly connected with feeler rod 5 through copper washer 4, the inside of feeler rod 5 is provided with thermistor 17, thermistor 17 is electrically connected with circuit board 2 through wire, dry reed 3 is electrically connected with alarm 21, alarm 21 is fixedly installed at the outside of casing 1, the inside of casing 1 is provided with waterproof pad 6,

[0022] Specifically, the thermistor 17 built-in feeler rod 5 realizes temperature detection, and the signal is transmitted to the circuit board 2 for processing through the wire, and the dry reed 3 is connected with the feeler rod 5 through the copper washer 4, which not only ensures the conductivity but also improves the heat conduction efficiency, and the thermistor 17 can reflect the temperature of the medium contacted by the feeler rod 5 in real time through the resistance value change, and the waterproof pad 6 in the casing 1 can block the water vapor in the external environment from eroding the internal components.

[0023] The inside of casing 1 is slidably connected with a connecting column 7, the top end of the connecting column 7 is fixedly connected with a pressing block 12, the outside of the pressing block 12 is provided with an anti-skid part, the bottom end of the connecting column 7 is fixedly connected with a sliding block 8, the outside of the sliding block 8 is slidably connected with a guide groove block 9, the side surface of the guide groove block 9 is fixedly connected with the casing 1, the upper top wall of the guide groove block 9 is fixedly connected with a spring 18, the bottom end of the spring 18 is fixedly connected with the sliding block 8, the spring 18 has two and is symmetrically distributed, the two springs 18 are located on the two sides of the connecting column 7, the inside of the sliding block 8 is provided with a clamping groove 10, the inside of the clamping groove 10 is slidably connected with a column body 11, the side surface of the column body 11 is fixedly connected with a connecting rod 13, the bottom end of the connecting rod 13 is rotatably connected with the guide groove block 9, the lower surface of the sliding block 8 is fixedly connected with a movable column 14, the bottom end of the movable column 14 is fixedly connected with a permanent magnet 15, the outside of the permanent magnet 15 is located at the side of the reed of the dry reed 3 when working, and the reed contact of the dry reed 3 is in an open state in a normal state.

[0024] Specifically, when it is necessary to verify whether the threshold value of the dry reed 3 meets the design standard, the pressing block 12 is pushed to drive the connecting column 7 to move the sliding block 8 along the guide groove block 9, the column body 11 outside the connecting rod 13 slides in the clamping groove 10 of the sliding block 8 along with the movement of the sliding block 8, and is fixed at the turning position of the clamping groove 10 to fix the sliding block 8, so that the permanent magnet 15 connected through the movable column 14 is located near the reed of the dry reed 3, so that the dry reed 3 can be closed to form a path, so that the alarm 21 can alarm.

[0025] The outer part of the shell 1 is provided with an insulating layer 16 between the copper gasket 4 and the dry reed 3, the inner part of the waterproof pad 6 is provided with a buffer pad 19 outside the dry reed 3, the connecting part of the probe rod 5 and the shell 1 is provided with a sealing ring 20, and the sealing ring 20 is tightly connected with the shell 1.

[0026] Specifically, the sealing ring 20 has a protection effect, can effectively block the external dust from entering the inside of the shell 1, avoids the influence of pollutants on the sensitivity of the dry reed 3 contact or the temperature sensing element, the buffer pad 19 can absorb vibration energy, provides a certain buffer, and prevents excessive vibration from affecting the sensing element.

[0027] Working principle: the built-in thermistor 17 in the probe rod 5 realizes temperature detection, transmits the signal to the circuit board 2 for processing through the wire, the dry reed 3 is connected with the probe rod 5 through the copper gasket 4, the copper gasket 4 ensures the conductivity and enhances the heat conduction efficiency, the thermistor 17 reflects the temperature of the medium contacted by the probe rod 5 in real time through the resistance change, when the temperature exceeds the preset safety range, the reed of the dry reed 3 is closed, thereby triggering the sound and light alarm of the alarm 21, before the temperature sensor is used, the permanent magnet 15 is pressed to realize the on-off control of the dry reed 3 through the slider 8 linkage mechanism, the permanent magnet 15 moves to trigger the reed contact or separation.

[0028] The above embodiment of the utility model is described in detail in combination with the drawings, but the utility model is not limited to the above embodiment, and various changes can be made within the knowledge range possessed by ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. A high accuracy temperature dry reed sensor characterized by, Include: The shell (1), the inside of the shell (1) is provided with circuit board (2) and dry reed (3), dry reed (3) is fixedly installed on the outside of circuit board (2), the outside of dry reed (3) is fixedly connected with probe rod (5) through copper washer (4), the inside of shell (1) is provided with waterproof pad (6); The inside of the shell (1) is slidably connected with connecting column (7), the bottom end of connecting column (7) is fixedly connected with sliding block (8), the outside of sliding block (8) is slidably connected with guide groove block (9), the side surface of guide groove block (9) is fixedly connected with shell (1), the inside of sliding block (8) is provided with clamping groove (10), the inside of clamping groove (10) is slidably connected with column body (11), the side surface of column body (11) is fixedly connected with connecting rod (13), the bottom end of connecting rod (13) is rotatably connected with guide groove block (9), the lower surface of sliding block (8) is fixedly connected with movable column (14), the bottom end of movable column (14) is fixedly connected with permanent magnet (15).

2. A high accuracy temperature dry reed switch sensor according to claim 1, wherein, The outside of permanent magnet (15) is located at the side of the reed of dry reed (3) during work, the reed contact of dry reed (3) is in the disconnected state in normal state.

3. A high accuracy temperature dry reed switch sensor according to claim 1, wherein, The outside of the shell (1) is provided with insulating layer (16), which is located between copper washer (4) and dry reed (3).

4. A high accuracy temperature dry reed switch sensor according to claim 1, wherein, The inside of the probe rod (5) is provided with thermistor (17), the thermistor (17) is electrically connected with circuit board (2) through wire, the dry reed (3) is electrically connected with alarm (21), the alarm (21) is fixedly installed on the outside of the shell (1).

5. A high accuracy temperature dry reed switch sensor according to claim 1, wherein, The upper top wall of the guide groove block (9) is fixedly connected with spring (18), the bottom end of spring (18) is fixedly connected with sliding block (8), the spring (18) has two and is symmetrically distributed, two spring (18) is located on both sides of connecting column (7).

6. A high accuracy temperature dry reed switch sensor according to claim 1, wherein, The inside of the waterproof pad (6) is provided with buffer pad (19), the buffer pad (19) is located outside the dry reed (3).

7. A high accuracy temperature dry reed switch sensor according to claim 1, wherein, The connecting part of the probe rod (5) and the shell (1) is provided with sealing ring (20), the sealing ring (20) is tightly connected with the shell (1).

8. A high accuracy temperature dry reed switch sensor according to claim 1, wherein, The top end of the connecting column (7) is fixedly connected with pressing block (12), the outside of pressing block (12) is provided with anti-skid part.

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