CN213239231U

CN213239231U - Armored thermocouple or thermal resistor temperature sensor

Info

Publication number: CN213239231U
Application number: CN202021720999.4U
Authority: CN
Inventors: 卢清松
Original assignee: Zhejiang Ruidu Instrument Technology Co ltd
Current assignee: Zhejiang Ruidu Instrument Technology Co ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-05-18
Anticipated expiration: 2030-08-18

Abstract

The armored thermocouple or thermal resistor temperature sensor comprises an induction rod (1), a junction box (2) and a fixing device sleeved outside the induction rod (1), wherein the fixing device comprises a connecting rod (3), a compression spring (4), an outer sleeve (5), an oil-resistant sealing ring (6), a lower end connecting screw (7) and a positioning device; an upper end connecting screw (9) is sleeved outside the main thread section (8) of the connecting rod (3) in a threaded connection mode, and the upper end and the lower end of the outer sleeve (5) are respectively in threaded connection with the upper end connecting screw (9) and the lower end connecting screw (7); the temperature measuring end can always keep effective contact with the surface of the measured wall, the accuracy and the reliability of temperature measurement are improved, and the temperature measuring device is particularly suitable for measuring the temperature of the wall adherent to the wall when the machine equipment runs.

Description

Armored thermocouple or thermal resistor temperature sensor

Technical Field

The utility model belongs to the technical field of temperature sensing, a armor thermocouple or thermal resistance temperature sensor is related to.

Background

At present, the contact temperature sensors are mainly thermocouples and thermal resistors, and the temperature parameters of a controlled object are converted into electric signals which are transmitted to a display, record and adjustment instrument, so that the object system carries out detection, adjustment and control. Their principles and characteristics are certainly different. The working principle of the thermocouple is as follows: two different metal conductors are welded together to form a closed loop, and if a temperature difference is generated by heating at the welding end, a thermoelectromotive force is generated in the loop, and the phenomenon is called a seebeck effect. If the temperature at the other end (considered as the reference end) is kept constant (typically 0 deg.c), the thermal electromotive force of the loop becomes a single-valued function of the temperature at the measurement end. Such elements for measuring temperature in a method of measuring thermoelectromotive force, i.e., two pairs of metal conductors, are called thermocouples. The thermoelectric force generated by the thermocouple is only related to the thermode material and the temperature difference between the two ends of the thermode material, and is not related to the length, the diameter and the like of the thermode. The thermal resistor is a resistor, and the resistance value of the resistor is changed positively or negatively due to the change of the temperature; the thermocouple generates the variation of induced voltage, which changes with the temperature. In order to protect the sensing element and prolong the service life, both the two sensors can be made into an armored type, the sensing element is usually a platinum wire or a platinum rhodium wire, a metal pipe, usually a stainless steel pipe, is sleeved outside the sensing element to form a sensing rod. The two sensors have different temperature ranges, and the armored thermocouple is a commonly used temperature sensor at present and can measure the surface or internal temperature of gas, liquid and steam and solid within the range of-200 to 1300 ℃. Thermal resistors are generally suitable for sensing temperatures in the range of 0-150 degrees.

The machine wall of mechanical equipment such as a steam turbine, a pump machine and the like is usually required to be provided with an armored thermocouple or an armored thermal resistance temperature sensor for measuring the temperature of important parts in the machine and is connected with an instrument for displaying through an electric wire. The following problems exist when the user uses the device at present: 1. because various states of oil materials usually exist in the machine cavity, the oil materials can leak out of the machine along the outer wall of the induction rod of the armored thermocouple or the thermal resistance temperature sensor when the electric wire is led out, the environment outside the machine is polluted, and more serious harm can cause great potential safety hazards such as fire and the like. In order to prevent oil in the machine from leaking to the outside of the machine from the wire leading-out hole, the prior technical means is to apply adhesive to the joint, so that the adhesive needs to be removed during each overhaul, and the adhesive needs to be applied again after the overhaul, which is troublesome. 2. The existing armored thermocouple or armored thermal resistance temperature sensor is characterized in that a connecting screw or a fixing flange is arranged on the outer wall of an induction rod, the armored thermocouple or armored thermal resistance temperature sensor is fixedly arranged on the machine wall of equipment through the connecting screw or the fixing flange, manual pressing is needed during installation, and manual adjustment is needed in the using process; because of the vibration of the mechanical equipment, the temperature measuring element is not contacted with the surface of the measured wall, and the temperature measurement is inaccurate. 3. As for the wall-attached measuring mode of the measuring end of the induction rod, once the temperature in the machine cavity suddenly rises, the induction rod is easy to burst due to self thermal expansion. 4. When the induction rod is installed, the induction rod can only be positioned and fixed at the fixed position of the outer wall of the induction rod.

Disclosure of Invention

The utility model aims to solve the technical problem to above-mentioned technical current situation, provide an armor formula thermocouple or an armor formula thermal resistance temperature sensor of antiseep, anti-burst.

The utility model discloses the armor thermocouple or the thermal resistance temperature sensor that antiseep, anti-burst adopted technical scheme as follows:

an armored thermocouple or thermal resistor temperature sensor comprises an induction rod (1), a junction box (2) and a fixing device sleeved outside the induction rod (1), and is characterized in that the fixing device comprises a connecting rod (3) directly sleeved outside the induction rod (1), a compression spring (4) sleeved outside the connecting rod (3), an outer sleeve (5) sleeved outside the compression spring (4), an oil-resistant sealing ring (6) directly sleeved outside the induction rod (1), a lower end connecting screw (7) sleeved outside the oil-resistant sealing ring (6), and a positioning device directly sleeved outside the induction rod (1); an upper end connecting screw (9) is sleeved outside the main thread section (8) of the connecting rod (3) in a threaded connection mode, and the upper end and the lower end of the outer sleeve (5) are respectively in threaded connection with the upper end connecting screw (9) and the lower end connecting screw (7).

The following is the further scheme of the armored thermocouple or thermal resistance temperature sensor of the utility model:

the positioning device comprises a conical deformation sleeve (10), a disc-shaped pressing sleeve (11) and a pressing nut (12), the upper end of the conical deformation sleeve (10) is thick, the lower end of the conical deformation sleeve is thin, the downward extending end of the disc-shaped pressing sleeve (11) can be placed at the upper end of the conical deformation sleeve (10), and when the pressing nut (12) is screwed down, the downward extending end of the disc-shaped pressing sleeve (11) extrudes downwards to force the conical deformation sleeve (10) to deform and lock the position of the sensing rod (1).

The connecting rod (3) comprises an upper end threaded section (13), a main threaded section (8) and a lower end threaded section (14); the upper end connecting screw (9) is provided with a thread extending end (15) extending downwards, the thread extending end (15) is connected with an inner thread at the upper end of the outer sleeve (5), a thread section (14) at the lower end of the connecting rod (3) is sleeved with an inner screw (16), and the compression spring (4) is clamped between the thread extending end (15) of the upper end connecting screw (9) and the inner screw (16).

The oil-resistant sealing ring (6) comprises at least 3 rubber oil-resistant sealing rings (6) which are sequentially overlapped.

An inner sleeve (17) is additionally arranged on the upper section of the oil-resistant sealing ring (6) of the induction rod (1).

The lower end connecting screw (7) is provided with an upper screw thread part (18) extending upwards and a lower screw thread part (19) extending downwards, the upper screw thread part (18) is in threaded connection with the lower end of the outer sleeve (5), and the lower screw thread part (19) is used for fixedly mounting the temperature sensor and the machine wall of the mechanical equipment.

The armored thermocouple or thermal resistor temperature sensor of the utility model, because of the compression spring sleeved outside the connecting rod and the oil-proof sealing ring directly sleeved outside the induction rod, relieves the vibration influence and eliminates the phenomenon that the oil in the machine leaks outside along the induction rod; due to the action of the compression spring, the temperature measuring end can always keep effective contact with the surface of the measured wall, and compared with the prior art, the accuracy and the reliability of temperature measurement are improved. The utility model discloses armored thermocouple or thermal resistance temperature sensor's roof pressure structure not only has the tight function of pushing up, can also play and examine at any time whether the temperature measurement end keeps good effect of contact with the measured object for a long time. In addition, the positioning device can be positioned and fixed at any position along the induction rod. The utility model discloses temperature of wall is measured to adherence when armor thermocouple or thermal resistance temperature sensor especially is fit for being used for the operation of machine equipment.

Drawings

Fig. 1 is a perspective view of the armored thermocouple or thermal resistor temperature sensor of the present invention.

Fig. 2 is a schematic view of the outer sleeve in a separated state.

FIG. 3 is a schematic view showing the fixing apparatus with the external parts separated.

Fig. 4 is a schematic view of the nut tube and the positioning device in a separated state.

Reference numbers in the figures: 1. an induction rod; 2. a junction box; 3. a connecting rod; 4. a compression spring; 5. an outer sleeve; 6. an oil-resistant sealing ring; 7. the lower end is connected with a screw; 8. a main thread segment; 9. the upper end is connected with a screw; 10. a conical deformation sleeve; 11. a disc-shaped pressing sleeve; 12. a pressure applying nut; 13. an upper end thread section; 14. a lower end threaded section; 15. a threaded extension end; 16. screws are arranged inside; 17. an inner sleeve; 18. a threaded upper portion; 19. a lower portion of the thread.

Detailed Description

Hereinafter, a specific embodiment of the present invention will be described with reference to fig. 1 to 4.

The utility model discloses armor formula thermocouple or thermal resistance temperature sensor, as shown in figure 1, including induction bar 1, terminal box 2, the fixing device of suit in induction bar 1 outside. As shown in fig. 2, the fixing device comprises a connecting rod 3 directly sleeved outside the sensing rod 1, a compression spring 4 sleeved outside the connecting rod 3, and an outer sleeve 5 sleeved outside the compression spring 4. As shown in fig. 2 and 3, the device further comprises an oil-proof sealing ring 6 directly sleeved outside the induction rod 1, a lower end connecting screw 7 sleeved outside the oil-proof sealing ring 6, and a positioning device directly sleeved outside the induction rod 1. An upper end connecting screw 9 is sleeved outside a main thread section 8 of the connecting rod 3 in a threaded connection mode, and the upper end and the lower end of the outer sleeve 5 are respectively in threaded connection with the upper end connecting screw 9 and the lower end connecting screw 7.

As shown in fig. 3 and 4, the positioning device comprises a conical deformation sleeve 10, a disc-shaped pressing sleeve 11 and a pressing nut 12, wherein the upper end of the conical deformation sleeve 10 is thick, the lower end of the conical deformation sleeve is thin, the downward extending end of the disc-shaped pressing sleeve 11 can be placed at the upper end of the conical deformation sleeve 10, and when the pressing nut 12 is screwed down, the downward extending end of the disc-shaped pressing sleeve 11 is pressed downwards to force the conical deformation sleeve 10 to deform and lock the position of the sensing rod 1.

As shown in fig. 4, the connecting rod 3 comprises an upper end threaded section 13, a main threaded section 8 and a lower end threaded section 14; as shown in fig. 3, the upper connecting screw 9 is provided with a threaded protruding end 15 which protrudes downwards, the threaded protruding end 15 is connected with the upper inner thread of the outer sleeve 5, the lower threaded section 14 of the connecting rod 3 is sleeved with an inner screw 16, and the compression spring 4 is clamped between the threaded protruding end 15 of the upper connecting screw 9 and the inner screw 16.

As shown in fig. 4, the oil-resistant seal ring 6 includes at least 3 rubber oil-resistant seal rings 6 stacked in sequence. An inner sleeve 17 is additionally arranged on the upper section of the oil-proof sealing ring 6 of the induction rod 1.

As shown in fig. 3, the lower connecting screw 7 is provided with an upper threaded part 18 extending upwards and a lower threaded part 19 extending downwards, the upper threaded part 18 is in threaded connection with the lower end of the outer sleeve 5, and the lower threaded part 19 is used for fixedly mounting the temperature sensor on the machine wall of the mechanical equipment.

During the use, utilize lower extreme connecting screw 7 screw thread lower part 19 will the utility model discloses armoured thermocouple or thermal resistance temperature sensor fixed mounting are at mechanical equipment's quick-witted wall, and the wall portion of treating the temperature measurement is hugged closely to the temperature measurement end of induction rod 1, and after the definite position, screw up the nut 12 of exerting pressure, the downward end that stretches out of disc pressure cover 11 extrudees downwards and forces conical deformation cover 10 to warp and lock induction rod 1 position. The positioning device can be positioned and fixed at any position along the induction rod. Because the compression spring sleeved outside the connecting rod and the oil-resistant sealing ring directly sleeved outside the induction rod are arranged, the vibration influence is relieved, and the phenomenon that oil in the machine leaks to the outside along the induction rod is eliminated; due to the action of the compression spring, the temperature measuring end can always keep effective contact with the surface of the measured wall, and compared with the prior art, the accuracy and the reliability of temperature measurement are improved. The utility model discloses temperature of wall is measured to adherence when armor thermocouple or thermal resistance temperature sensor especially is fit for being used for the operation of machine equipment.

The directions of the left, right, up, down, front and back in the present application document are only convenient to be expressed relative to the representation of the drawings in the present application specification, and do not constitute limitations of the present invention.

Claims

1. An armored thermocouple or thermal resistor temperature sensor comprises an induction rod (1), a junction box (2) and a fixing device sleeved outside the induction rod (1), and is characterized in that the fixing device comprises a connecting rod (3) directly sleeved outside the induction rod (1), a compression spring (4) sleeved outside the connecting rod (3), an outer sleeve (5) sleeved outside the compression spring (4), an oil-resistant sealing ring (6) directly sleeved outside the induction rod (1), a lower end connecting screw (7) sleeved outside the oil-resistant sealing ring (6), and a positioning device directly sleeved outside the induction rod (1); an upper end connecting screw (9) is sleeved outside the main thread section (8) of the connecting rod (3) in a threaded connection mode, and the upper end and the lower end of the outer sleeve (5) are respectively in threaded connection with the upper end connecting screw (9) and the lower end connecting screw (7).

2. The temperature sensor according to claim 1, wherein the positioning device comprises a conical deformation sleeve (10), a disc-shaped pressing sleeve (11) and a pressing nut (12), the upper end of the conical deformation sleeve (10) is thick, the lower end of the conical deformation sleeve is thin, the downward extending end of the disc-shaped pressing sleeve (11) can be placed at the upper end of the conical deformation sleeve (10), and when the pressing nut (12) is screwed down, the downward extending end of the disc-shaped pressing sleeve (11) is pressed downwards to force the conical deformation sleeve (10) to deform and lock the position of the sensing rod (1).

3. The temperature sensor according to claim 2, wherein the connecting rod (3) comprises an upper threaded section (13), a main threaded section (8), a lower threaded section (14); the upper end connecting screw (9) is provided with a thread extending end (15) extending downwards, the thread extending end (15) is connected with an inner thread at the upper end of the outer sleeve (5), a thread section (14) at the lower end of the connecting rod (3) is sleeved with an inner screw (16), and the compression spring (4) is clamped between the thread extending end (15) of the upper end connecting screw (9) and the inner screw (16).

4. The temperature sensor according to claim 1, characterized in that the oil-resistant sealing ring (6) is at least 3 oil-resistant sealing rings (6) stacked in sequence.

5. The temperature sensor according to claim 1, characterized in that the sensing rod (1) is provided with an inner sleeve (17) at the upper section of the oil-proof seal ring (6).

6. The temperature sensor according to claim 1, wherein the lower connecting screw (7) is provided with an upper threaded portion (18) extending upwards and a lower threaded portion (19) extending downwards, the upper threaded portion (18) being in threaded connection with the lower end of the outer sleeve (5), the lower threaded portion (19) being used for fixedly mounting the temperature sensor to the machine wall of the mechanical device.