Electric heater thermocouple installation structure capable of accurately measuring temperature and convenient to disassemble
By designing a sleeve and sleeve pipe structure inside the electric heater housing, the thermocouple and coil are in close contact, which solves the problems of inaccurate temperature measurement and difficult disassembly under high temperature and high pressure conditions, and achieves accurate temperature measurement and convenient maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2026-03-27
AI Technical Summary
In existing electric heaters used in high-temperature, high-pressure, and polycrystalline silicon industries, the thermocouples and coils are difficult to make close contact, resulting in inaccurate temperature measurement. At the same time, welding or clamp fixing is inconvenient for disassembly, while direct thread or flange connection cannot guarantee close contact.
An electric heater housing with an annular cavity was designed, containing a coil and a sleeve. The sleeve is welded to the coil, and the sleeve is movably fitted. The thermocouple measuring rod is tightly fitted to the coil through the trapezoidal cavity and is detachable by thread or flange connection, ensuring accurate temperature measurement and easy maintenance.
This design achieves close contact between the thermocouple and the coil, ensuring accurate temperature measurement, while also allowing for online maintenance and replacement, thus solving the problem of difficult disassembly.
Smart Images
Figure CN224051455U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of electric heating, specifically to a precision temperature measurement and convenient to detach electric heater thermocouple mounting structure. BACKGROUND
[0002] Electric heater has wide application in petroleum, petrochemical, natural gas, chemical industry, electric power, metallurgy, machinery, medicine, food and civil fire-fighting pipeline industries.
[0003] And electric heater is used for high temperature and high pressure, polycrystalline silicon industry, gas-liquid mixing, heavy oil, high viscosity environment, in order to accurately measure temperature, thermocouple must be in close contact with coil, in order to realize close contact, can be welded or fixed through the clamp, but the two methods make the thermocouple not convenient to detach, if directly threaded or flange connection, the thermocouple feels the temperature measuring rod and the measured object cannot be in close contact, leading to inaccurate temperature measurement. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a precision temperature measurement and convenient to detach electric heater thermocouple mounting structure, which can effectively solve the problems in the background art.
[0005] The technical scheme for realizing the above-mentioned purpose is as follows: a precision temperature measurement and convenient to detach electric heater thermocouple mounting structure, comprising an electric heater shell provided with an annular cavity, a coil for heating medium circulation is installed in the annular cavity of the electric heater shell;
[0006] Characterized in that: one side of the coil is provided with a sleeve, a sleeve pipe is fixedly arranged on the inner wall of the electric heater shell, a notch is formed on the side wall of one end of the sleeve to form a semicircular connecting part, the semicircular connecting part is bent towards the coil side and is fixed with the coil through the notch side, so that a trapezoidal cavity gradually narrowing outward is formed between the semicircular connecting part and the coil, and the other end of the sleeve is movably sleeved on the sleeve pipe;
[0007] The measuring rod of the thermocouple passes through the sleeve pipe into the sleeve, the connecting end located outside is detachably connected to the outer wall of the electric heating shell, the top end of the measuring rod is inserted into the trapezoidal cavity, the large end of the trapezoidal cavity has a larger diameter than the diameter of the thermocouple temperature measuring rod, and the small end has a smaller diameter than the diameter of the thermocouple temperature measuring rod, so that the top end of the temperature measuring rod is tightly attached to the coil under the extrusion of the trapezoidal cavity.
[0008] Further, the sleeve pipe is located at the bottom of the electric heater shell, the lower end of the sleeve is movably sleeved on the sleeve pipe, and the upper end is connected to the coil.
[0009] Further, the sleeve and the sleeve pipe are coaxially arranged.
[0010] The beneficial effects of this utility model are as follows: 1) One end of the sleeve is welded to the coil, ensuring a reliable connection and preventing it from falling off; 2) The lower part of the sleeve is movably fitted onto the sleeve tube, ensuring sufficient space for the coil to expand; 3) The large-mouth diameter of the trapezoidal cavity of the sleeve is larger than the diameter of the thermocouple measuring rod, and the small-mouth diameter is smaller than the diameter of the thermocouple measuring rod, ensuring that the thermocouple is inserted more and more tightly; 4) The sleeve tube is welded to the bottom plate of the electric heater housing, ensuring accurate and firm positioning; 5) The connection end of the thermocouple located outside the electric heater housing is connected by threads or flanges, allowing the thermocouple to fit tightly with the coil while being detachable, enabling online maintenance and replacement, while ensuring measurement accuracy. Attached Figure Description
[0011] Figure 1 This is a structural diagram of the present invention;
[0012] Figure 2 This is a schematic diagram showing the connection between the semi-circular connecting part at the end of the sleeve and the coil.
[0013] Figure 3 for Figure 1 A magnified view of part A in the middle. Detailed Implementation
[0014] like Figure 1 , 2 As shown in Figure 3, this utility model includes an electric heater housing 1 with an annular cavity. A heat insulation layer 3 is provided on the inner wall of the electric heater housing 1. A coil 4 for the flow of heating medium and an electric heating element for adding medium to the coil 4 are installed in the annular cavity of the electric heater housing 1. The electric heating element can be, but is not limited to, a resistance wire installed on the heat insulation layer 3. As is known to those skilled in the art, a high-temperature medium can also be introduced into the annular cavity to replace the electric heating element, which are all conventional replacements.
[0015] A sleeve 5 is provided on one side of the coil 4, and a sleeve 6 is fixedly provided on the inner wall of the electric heater housing 1. A notch 7 is opened on one side wall of the sleeve 5 to form a semi-circular connecting part 8. The semi-circular connecting part 8 is bent toward the coil 4 and welded to the coil 4 through the notch side, so that a trapezoidal cavity 9 with the opening gradually narrowing outward is formed between the semi-circular connecting part 8 and the coil 4. The other end of the sleeve 5 is movably sleeved on the sleeve 6.
[0016] As a further explanation of this embodiment, the sleeve 5 and the sleeve connector 6 can be arranged coaxially, such as... Figure 1 As shown, the sleeve 6 can also be set eccentrically relative to the sleeve, with an eccentric distance of no more than 1cm. Because the temperature measuring rod of the thermocouple 9 is relatively thin, generally about 4mm, and has a certain degree of curvature, it can be inserted into a pipe with a small degree of curvature.
[0017] The measuring rod of the thermocouple 9 passes through the side wall of the electric heater shell 1 and reaches in the sleeve pipe 5 along the sleeve pipe 6, the connecting end of the thermocouple 9 located outside the electric heater shell 1 is detachably connected on the outer wall of the electric heater shell 1 (specifically, a threaded or flange connection can be adopted, which is prior art), the top end of the measuring rod is inserted into the trapezoidal cavity 8, the large end of the trapezoidal cavity 8 has a diameter larger than the diameter of the temperature measuring rod of the thermocouple 9 and the small end has a diameter smaller than the diameter of the temperature measuring rod of the thermocouple 9, so that the measuring rod of the thermocouple 9 is inserted more tightly and closely contacts the coil pipe 4.
[0018] The threaded or flange between the thermocouple 9 and the outside of the electric heater shell 1 is detached and loosened, and then the thermocouple 9 can be pulled outwards.
Claims
1. An electric heater thermocouple installation structure with accurate temperature measurement and convenient disassembly, comprising an electric heater shell provided with an annular cavity, and a coil pipe for heating medium circulation being installed in the annular cavity of the electric heater shell. characterized in that One side of the coil pipe is provided with a sleeve, and a sleeve connecting pipe is fixedly arranged on the inner wall of the electric heater shell; a notch is formed on the side wall of one end of the sleeve to form a semicircular connecting part, the semicircular connecting part is bent towards the coil pipe and is fixed with the coil pipe through the notch, so that a trapezoidal cavity with a gradually decreasing diameter is formed between the semicircular connecting part and the coil pipe, and the other end of the sleeve is movably sleeved on the sleeve connecting pipe. A measuring rod of a thermocouple passes through the sleeve connecting pipe into the sleeve, a connecting end located at the outside is detachably connected to the outer wall of the electric heating shell, the top end of the measuring rod is inserted into the trapezoidal cavity, the large end of the trapezoidal cavity has a diameter larger than the diameter of the thermocouple temperature measuring rod, and the small end has a diameter smaller than the diameter of the thermocouple temperature measuring rod, so that the top end of the temperature measuring rod is tightly attached to the coil pipe under the extrusion of the trapezoidal cavity.
2. The electric heater thermocouple mounting structure according to claim 1, characterized in that: The sleeve connecting pipe is located at the bottom of the electric heater shell, the lower end of the sleeve is sleeved on the sleeve connecting pipe, and the upper end is connected to the coil pipe.
3. The electric heater thermocouple mounting structure according to claim 1, characterized in that: The sleeve and the sleeve connecting pipe are coaxially arranged.