CN211504442U - Protection device of thermal resistor - Google Patents

Abstract

The utility model discloses a protection device of thermal resistance, including protective case, protective case includes the sleeve pipe main part, the inside of sleeve pipe main part is equipped with the cavity, the cavity interpolation is equipped with the thermal resistance, be connected with the terminal box on the protective case, be equipped with the heat-conducting agent in the one end of sleeve pipe main part keeping away from the terminal box, the one end and the terminal box of thermal resistance are connected, the other end of thermal resistance is inserted and is located in the heat-conducting agent, the one end that the sleeve pipe main part is close to the heat-conducting agent is dug and is had a plurality of evenly distributed's through-hole, be connected with the graphite layer between heat-conducting agent and the through-hole, the outside of cavity is equipped with the aerogel felt, be connected with the asbestos; the utility model provides a protection device of thermal resistance, it can reduce heat transfer and heat dissipation loss between protective case and the thermal resistance, easily improves the degree of accuracy when the thermal resistance is measured, and convenient to use person uses.

Description

Protection device of thermal resistor

Technical Field

The utility model relates to a thermal resistor technical field especially relates to a protection device of thermal resistor.

Background

Thermal resistance is one of the most commonly used temperature detectors in the medium and low temperature regions. Thermal resistance thermometry is based on the property that the resistance of a metal conductor increases with increasing temperature. It is not only widely used in industrial thermometry, but also made into standard reference instrument. The thermal resistor is mostly made of pure metal materials, platinum and copper are most widely used at present, and nickel, manganese, rhodium and other materials are used for manufacturing the thermal resistor. The metal thermal resistor is made of a plurality of commonly used temperature sensing materials, and the most commonly used temperature sensing material is a platinum wire. The metal thermal resistance material for industrial measurement includes copper, nickel, iron-nickel, etc. besides platinum wire.

The principle of thermal resistance measurement is based on the property that the resistance of a conductor or semiconductor changes with temperature to measure temperature and temperature-related parameters. Thermal resistors typically require a resistance signal to be transmitted through a lead to a computer control or other secondary instrument.

The protective sleeve is required to be sleeved outside the thermal resistor in the use process of the existing thermal resistor, the protective sleeve and the thermal resistor are inserted into a corresponding pipeline together, and the thermal resistor with the protective sleeve has heat transfer and heat dissipation loss, so that the thermal resistor is prone to inaccurate measurement, and the use is influenced.

Therefore, in view of the above technical problems, it is necessary to provide a protection device for a thermal resistor.

SUMMERY OF THE UTILITY MODEL

In view of this, an object of the present invention is to provide a protection device for thermal resistor, which can reduce the heat transfer and heat dissipation loss between the protection sleeve and the thermal resistor, and easily improve the accuracy of the thermal resistor during measurement, so that the user can use the protection device conveniently.

In order to achieve the above object, an embodiment of the present invention provides the following technical solutions:

the utility model provides a protection device of thermal resistance, includes protective case, protective case includes the sleeve pipe main part, the inside of sleeve pipe main part is equipped with the cavity, the cavity interpolation is equipped with the thermal resistance, be connected with the terminal box on the protective case, the one end that the terminal box was kept away from to the sleeve pipe main part is equipped with the heat-conducting agent, the one end and the terminal box of thermal resistance are connected, the other end of thermal resistance is inserted and is located in the heat-conducting agent, the sleeve pipe main part is close to one of heat-conducting agent and serves the through-hole that opens the chisel and have a plurality of evenly distributed, be connected with the graphite layer between heat-conducting agent and the through-hole, the outside of cavity is equipped with the aerogel felt, be connected with the asbestos on the inside wall of sleeve pipe.

As a further improvement, the outside cover that the thermal resistance is close to the heat-conducting agent is equipped with the heat insulating board, the heat insulating board is located between aerogel felt and the heat-conducting agent, easily completely cuts off the heat of heat-conducting agent transmission, concentrates on the thermal resistance with the heat, is convenient for simultaneously fixed thermal resistance for the thermal resistance is difficult for rocking when using.

As a further improvement, the heat insulation plate is a heat-resistant ceramic plate, so that the heat insulation effect is easily improved.

As a further improvement of the utility model, the heat conducting agent is nano alumina powder, which is easy to transfer heat and transfers heat to the thermal resistor.

As a further improvement, through flange joint between protective case and the terminal box, and be equipped with the sealing washer between protective case and the terminal box, easily reduce the heat and run off, improve the measuring degree of accuracy.

As a further improvement, the junction box comprises a junction box main body, a wiring port is connected to the junction box main body, and resistance signals are easily transmitted to the computer control device or other secondary instruments through leads, so that a user can conveniently observe the resistance signals.

The utility model has the advantages that: the utility model provides a protection device of thermal resistance, it can reduce heat transfer and heat dissipation loss between protective case and the thermal resistance, easily improves the degree of accuracy when the thermal resistance is measured, and convenient to use person uses.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a perspective view of a protection device for a thermal resistor according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a protection device for a thermal resistor according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram at a in fig. 2.

In the figure: 1. the heat insulation structure comprises a protective sleeve, 101, a sleeve body, 102, a cavity, 103, a heat conducting agent, 104, a graphite layer, 105, through holes, 106, aerogel felt, 107, protrusions, 108, asbestos, 109, a heat insulation board, 2, a junction box, 201, a junction box body, 202, a junction port and 3, a thermal resistor.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

In the various figures of the present invention, certain dimensions of structures or portions are exaggerated relative to other structures or portions for ease of illustration, and thus, are used only to illustrate the basic structure of the subject matter of the present invention.

Terms such as "left", "right", and the like, used herein to denote relative spatial positions, are used for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "to the right" of other elements or features would then be oriented "to the left" of the other elements or features. Thus, the exemplary term "right side" may encompass both left and right orientations. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Referring to fig. 1 to 3, in an embodiment of the present invention, a thermal resistor protection device includes a protection sleeve 1, a junction box 2 connected to the protection sleeve 1, and a thermal resistor 3 disposed in the protection sleeve 1.

Referring to fig. 2 to 3, the protective sleeve 1 includes a sleeve main body 101, a cavity 102 is formed inside the sleeve main body 101, the thermal resistor 3 is easy to be placed in the cavity 102, the thermal resistor 3 is inserted into the cavity 102, and the protective sleeve 1 is connected with a junction box 2, so that a resistance signal is easy to be transmitted to a computer control device or other secondary instruments through a lead wire, and is convenient for a user to observe.

Referring to fig. 3, a heat conducting agent 103 is disposed in one end of the sleeve main body 101 far from the junction box 2, which is easy to transfer heat to the thermal resistor 3, the heat conducting agent 103 is nano alumina powder, which is easy to transfer heat, and transfers heat to the thermal resistor 3, one end of the thermal resistor 3 is connected to the junction box 2, the other end of the thermal resistor 3 is inserted into the heat conducting agent 103, a plurality of through holes 105 are uniformly distributed on one end of the sleeve main body 101 near the heat conducting agent 103, which is easy to enter the heat conducting agent 103 through the through holes 105, a graphite layer 104 is connected between the heat conducting agent 103 and the through holes 105, which is easy to filter impurities in a pipeline, so that the heat conducting agent 103 is not easy to generate chemical reaction, an aerogel felt 106 is disposed outside the cavity 102, which is easy to reduce heat loss on the thermal resistor 3, asbestos 108 is connected to the inner side wall of the, the accuracy of the measuring result is easily improved, the plurality of bulges 107 which are uniformly distributed are connected between the aerogel felt 106 and the asbestos 108, the strength of the protective sleeve 1 is easily increased, the protective sleeve 1 is not easy to damage, and meanwhile, the support can be provided for the aerogel felt 106 and the asbestos 108.

Wherein, thermal insulation board 109 is equipped with to the outside cover that thermal resistance 3 is close to heat-conducting agent 103, and thermal insulation board 109 is located between aerogel felt 106 and the heat-conducting agent 103, easily completely cuts off the heat of heat-conducting agent 103 transmission, concentrates on thermal resistance 3 with the heat, is convenient for simultaneously fixed thermal resistance 3 for thermal resistance 3 is difficult for rocking when using, and thermal insulation board 109 is heat-resisting ceramic plate, easily improves thermal-insulated effect.

Referring to fig. 1, the protection sleeve 1 is connected with the junction box 2 through a flange, a sealing ring is arranged between the protection sleeve 1 and the junction box 2, heat loss is easily reduced, and measuring accuracy is improved.

The working principle is as follows: a user firstly inserts the thermal resistor 3 into the cavity 102 in the protective sleeve 1, so that one end of the thermal resistor 3 is inserted into the heat-conducting agent 103 through the heat insulation plate 109, and the protective sleeve 1 is connected with the junction box 2 through a flange; when the protective sleeve is used, a user inserts the protective sleeve 1 into a corresponding pipeline, heat can enter the protective sleeve 1 through the through holes 105 in the sleeve main body 101, the graphite layer 104 can prevent impurities in the pipeline from entering, so that the heat conducting agent 103 is not easy to chemically react with the impurities to influence a measurement result, the heat is intensively transferred to the thermal resistor 3 through the heat conducting agent 103, the heat insulation plate 109 can isolate heat loss, the heat is transferred through the thermal resistor 3, the loss of the heat in the transfer process can be reduced by the aerogel felt 106, other heat can be isolated from being transferred to the thermal resistor 3 by the asbestos 108 to influence the correct measurement reading of the user, the bulge 107 not only can increase the overall strength of the protective sleeve 1, but also provides corresponding support for the aerogel felt 106 and the asbestos 108, so that the use effects of the aerogel felt 106 and the asbestos 108 are good, and the thermal resistor 3 transfers the heat to the junction box 2, the junction box 2 transmits the resistance signal to the computer control device through the junction box main body 201, so that the user can conveniently perform direct reading.

According to the technical scheme provided by the utility model, the utility model discloses following beneficial effect has:

the utility model provides a protection device of thermal resistance, it can reduce heat transfer and heat dissipation loss between protective case and the thermal resistance, easily improves the degree of accuracy when the thermal resistance is measured, and convenient to use person uses.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (6)

1. The protection device for the thermal resistor is characterized by comprising a protection sleeve (1), wherein the protection sleeve (1) comprises a sleeve main body (101), a cavity (102) is formed in the sleeve main body (101), the thermal resistor (3) is inserted into the cavity (102), a junction box (2) is connected onto the protection sleeve (1), a heat conducting agent (103) is arranged in one end, away from the junction box (2), of the sleeve main body (101), one end of the thermal resistor (3) is connected with the junction box (2), the other end of the thermal resistor (3) is inserted into the heat conducting agent (103), a plurality of uniformly distributed through holes (105) are formed in one end, close to the heat conducting agent (103), of the sleeve main body (101), a graphite layer (104) is connected between the heat conducting agent (103) and the through holes (105), and a gas gel felt (106) is arranged on the outer side of the cavity (102), be connected with asbestos (108) on the inside wall of sleeve pipe main part (101), be connected with a plurality of evenly distributed's arch (107) between aerogel felt (106) and asbestos (108).

2. A protection device for a thermal resistor according to claim 1, characterized in that the thermal resistor (3) is sleeved with a thermal insulation board (109) at the outer side close to the heat conducting agent (103), and the thermal insulation board (109) is arranged between the aerogel felt (106) and the heat conducting agent (103).

3. A protection device for a thermal resistor according to claim 2 characterized in that said thermal insulation plate (109) is a refractory ceramic plate.

4. A protection device for a thermal resistor according to claim 1, characterized in that said heat-conducting agent (103) is a nano alumina powder.

5. A protection device for a thermal resistor as claimed in claim 1, characterized in that the protection sleeve (1) is connected with the junction box (2) by a flange, and a sealing ring is arranged between the protection sleeve (1) and the junction box (2).

6. A protection device for a thermal resistor according to claim 1, characterized in that the junction box (2) comprises a junction box main body (201), and a connection port (202) is connected to the junction box main body (201).

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