CN219368966U - Quick heat dissipation formula temperature transmitter - Google Patents

Abstract

The utility model provides a quick heat dissipation type temperature transmitter.A lower end face of a junction box is provided with an extension pipe, a limiting ring is fixedly arranged in the extension pipe, heat dissipation silicone grease is laid on the lower end face of the junction box, and a wire extending into an inner cavity of the junction box is wrapped in the heat dissipation silicone grease. This quick heat dissipation formula temperature transmitter, spacing ring is with extension tube inner chamber partition for upper and lower two parts, the protection tube is fixed in extension tube lower part inner chamber, extension tube upper portion inner chamber plays the effect of keeping apart protection tube tail end and terminal box inner chamber, distance between protection tube tail end and the terminal box inner chamber increases, still laid the heat dissipation silicone grease on terminal box lower terminal surface, the heat dissipation silicone grease can be with thermocouple conduction to terminal box lower terminal surface and conduction to external world under the temperature on the wire, heat dispersion improves greatly, when having reduced or even avoided measuring high temperature medium, medium temperature self preservation protection tube and wire conduction go up the influence to the temperature in the terminal box.

Description

Quick heat dissipation formula temperature transmitter

Technical Field

The utility model relates to the technical field of temperature measuring instruments and meters, in particular to a rapid heat dissipation type temperature transmitter.

Background

The temperature transmitter is a temperature measuring instrument widely applied in industrial environment, and in order to prolong the service life, a protective tube with good heat conduction performance is generally arranged outside a temperature measuring element-thermocouple in the temperature transmitter, the temperature in the environment to be measured is timely conducted to the hot end of the thermocouple through the protective tube to cause thermocouple response, then thermoelectromotive force is generated in a thermocouple loop, and the thermoelectromotive force is converted into a standard electric signal through a chip board in a junction box and is transmitted to external equipment, so that accurate measurement and control of the temperature are realized.

When the temperature transmitter works, besides the heat generated by the working of the electric components in the junction box, when the temperature transmitter is used for measuring a high-temperature medium, the medium temperature can be conducted into the junction box along the protection pipe and the lead wire connected with the cold end of the thermocouple, so that the temperature in the junction box is further increased, and the measurement precision and the service life of the temperature transmitter are seriously influenced. In order to reduce the influence of medium temperature on the temperature in the junction box when measuring high-temperature medium, strengthen the radiating effect, in reality, technical staff provides a scheme of seting up the louvre on the junction box body, and this scheme is provided with the chip board in the junction box although can realizing strengthening the radiating effect, and the setting of louvre is equivalent to exposing the chip board in the external environment, and this scheme is not applicable to the great temperature measurement occasion of humidity.

Disclosure of Invention

The utility model aims to provide a quick heat dissipation type temperature transmitter so as to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a quick heat dissipation formula temperature transmitter, includes the thermocouple, and the thermocouple is wrapped up outward and is had the protection tube, and the thermocouple cold junction is connected with the wire and the wire stretches out outside the protection tube tail end, and protection tube tail portion is connected with the terminal box, is provided with the chip board in the terminal box, and the thermocouple passes through the wire electricity to be connected to the chip board on, terminal box lower extreme face downwardly extending is provided with the extension pipe that is linked together with the terminal box inner chamber, and the extension pipe internal fixation is provided with the spacing ring of center seting up the through hole, and the protection tube tail stretches into the extension pipe and is fixed in under the spacing ring, and the wire passes the extension pipe on the spacing ring and stretches into on the terminal box inner chamber electricity to be connected to the chip board, has laid the heat dissipation silicone on the terminal box lower extreme face, and the wire parcel that stretches into the terminal box inner chamber is in the heat dissipation silicone.

Preferably, the inner hole of the extension tube above the limiting ring is a unthreaded hole, the inner hole of the extension tube below the limiting ring is a threaded hole, and threads matched with the threaded hole are arranged on the outer side of the tail part of the protection tube.

Preferably, the outer side surface of the limiting ring is also provided with threads matched with the threaded holes.

Preferably, a connecting hole for communicating the inner cavity of the junction box with the extension pipe is formed in the lower end face of the junction box, and the aperture of the connecting hole is smaller than that of the extension pipe.

Preferably, the bottom of the junction box is provided with a heat insulation column, and the chip board is fixedly arranged on the heat insulation column.

Preferably, the periphery of the junction box is provided with a heat dissipation chamber in a surrounding mode, and the heat dissipation chamber is provided with a liquid inlet hole and a liquid outlet hole.

Preferably, the lower end face of the heat dissipation chamber is flush with the lower end face of the extension pipe, and the extension pipe is wrapped in the heat dissipation chamber.

This quick heat dissipation formula temperature transmitter is provided with the extension pipe at terminal box lower terminal surface, is provided with the spacing ring in the extension pipe, and the spacing ring separates the extension pipe inner chamber into upper and lower two parts, and the protection pipe tail end stretches into and is fixed in among the extension pipe lower part inner chamber, and extension pipe upper portion inner chamber plays the effect of keeping apart protection pipe tail end and terminal box inner chamber for distance between protection pipe tail end and the terminal box inner chamber increases, reduces even when having avoided measuring high temperature medium, and medium temperature self preservation protects the pipe conduction and goes up the influence to the terminal box inner temperature. This quick heat dissipation formula temperature transmitter has still laid the heat dissipation silicone grease on terminal surface under the terminal box, stretches into the wire parcel of terminal box inner chamber from the extension pipe in the heat dissipation silicone grease, and the heat dissipation silicone grease can be with thermocouple conduction to terminal box lower extreme face and conduction to external world down to the temperature on the wire, and heat dispersion improves greatly, has reduced even avoided when measuring high temperature medium, and medium temperature is from the wire conduction and go up the influence to the temperature in the terminal box, has still reduced simultaneously and has inserted the wire tip temperature on the chip board, has reduced the adverse effect to the chip board.

Drawings

FIG. 1 is a schematic view of the internal structure of a junction box according to the present utility model;

FIG. 2 is a schematic diagram of the structure of the present utility model;

fig. 3 is a top view of the present utility model.

In the figure: 1. junction box, 2, protection tube, 3, thermocouple, 4, joint, 5, wire, 6, electric hole, 7, chip board, 8, radiator chamber, 9, inlet hole, 10, outlet hole, 11, extension tube, 12, connecting hole, 13, heat dissipation silicone grease, 14, heat insulation column, 15, spacing ring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 3, a fast heat dissipation type temperature transmitter according to this embodiment includes a thermocouple 3, a protection tube 2 is wrapped outside the thermocouple 3, insulating glue is filled between the thermocouple 3 and the protection tube 2, the hot end of the thermocouple 3 is located inside the head end of the protection tube 2, the thermocouple 3 is inserted into a medium to be measured during measurement and is connected with a medium channel to be measured through a connector 4 arranged at the upper middle part of the protection tube 2, the cold end of the thermocouple 3 is located near the tail end of the protection tube 2, a lead 5 is connected to the cold end and extends out of the tail end of the protection tube 2, a junction box 1 is connected to the tail end of the protection tube 2, a chip board 7 is arranged in the junction box 1, an electrical hole 6 for electrically connecting the chip board 7 with an external device is further arranged on the side wall of the junction box 1, the thermocouple 3 is electrically connected to the chip board 7 through the lead 5, an extension tube 11 connected to the inner cavity of the junction box 1 downward, the extension tube 11 is made of the same material as the junction box 1, a limiting ring 15 with a material such as copper and aluminum can be selected, a limiting ring 15 with a through a central through hole is fixedly arranged in the extension tube 11, the junction box 11 extends into the silicon tube 2, extends into the silicon tube 1 through the upper end face of the limiting ring 13 and extends into the upper end face of the junction box 13, and extends into the silicon tube 1 to the upper end 13.

This quick heat dissipation formula temperature transmitter is provided with extension pipe 11 at terminal surface under terminal box 1, be provided with spacing ring 15 in the extension pipe 11, spacing ring 15 is with extension pipe 11 inner chamber partition upper and lower two parts, through spacing effect of spacing ring 15, protection pipe 2 can't fully stretch into and occupy the whole inner chamber of extension pipe 11, can only stretch into and be fixed in among the inner chamber of extension pipe 11 lower part, protection pipe 2 tail end and terminal box 1 inner chamber can't direct contact, the effect of keeping apart protection pipe 2 tail end and terminal box 1 inner chamber is played to extension pipe 11 upper portion inner chamber, distance between protection pipe 2 tail end and the terminal box 1 inner chamber increases, when reducing or even avoided measuring high temperature medium, medium temperature self preservation protects the pipe conduction and goes up the influence to the terminal box inner temperature. This quick heat dissipation formula temperature transmitter has still laid heat dissipation silicone grease 13 on terminal surface under terminal box 1, stretches into wire 5 parcel in terminal box 1 inner chamber from extension pipe 11 in heat dissipation silicone grease 13, heat dissipation silicone grease 13 can conduct thermocouple 3 to terminal box 1 terminal surface under terminal surface and conduct to the external world down to the temperature on wire 5, heat dispersion improves greatly, when having reduced or even avoided measuring high temperature medium, the medium temperature is conducted from wire 5 and goes up the influence to the temperature in the terminal box, still reduced simultaneously and cut in wire 5 tip temperature on the chip board 7, has reduced the adverse effect to chip board 7. This quick heat dissipation formula temperature transmitter has reduced when measuring high temperature medium through setting up above structure, and medium temperature can effectively promote temperature transmitter measurement accuracy and extension temperature transmitter life to the influence of temperature in the terminal box.

In the quick heat dissipation type temperature transmitter, specifically, an inner hole of an extension tube 11 on a limiting ring 15 is a light hole, the light hole corresponds to an inner cavity at the upper part of the extension tube 11, an inner hole of the extension tube 11 below the limiting ring 15 is a threaded hole, the threaded hole corresponds to an inner cavity at the lower part of the extension tube 11, threads matched with the threaded hole are arranged at the outer side of the tail part of a protection tube 2, and the tail end of the protection tube 2 is screwed in the inner cavity at the lower part of the extension tube 11.

Further, the outer side surface of the limiting ring 15 is also provided with threads matched with the threaded holes, the limiting ring 15 is screwed at the deepest part of the lower inner cavity of the extension pipe 11, and the through hole formed in the center position of the limiting ring 15 can be a rectangular hole or other non-circular holes, so that the limiting ring can be screwed conveniently through corresponding bar tools.

In this quick heat dissipation formula temperature transmitter, set up the connecting hole 12 of intercommunication terminal box 1 inner chamber and extension pipe 11 on the terminal surface under the terminal box 1, the connecting hole 12 aperture is less than extension pipe 11 aperture, can further play the effect that weakens the upwards conduction effect of protection pipe 2 tail end temperature, can also avoid falling into in the extension pipe 11 because of the too big heat dissipation silicone grease 13 in aperture.

In this quick heat dissipation formula temperature transmitter, terminal box 1 bottom is provided with heat insulating column 14, and heat insulating column 14 can be made by insulating material such as porous ceramics, and chip board 7 is fixed to be set up on heat insulating column 14, and terminal surface temperature conduction to chip board 7 under terminal box 1 can be avoided to heat insulating column 14, can also increase terminal surface under terminal box 1 and the distance between chip board 7, and then increases the distance between heat dissipation silicone grease 13 and the chip board 7, for thickening heat dissipation silicone grease 13 thickness simultaneously, promotes the radiating effect and remains sufficient surplus.

In this quick heat dissipation formula temperature transmitter, terminal box 1 periphery is encircleed and is provided with heat dissipation room 8, is provided with feed liquor hole 9 and play liquid hole 10 on the heat dissipation room 8, and heat dissipation room 8 need be for electric hole 6 to leave and dodge the space, is favorable to promoting the heat dispersion of terminal box 1 inner chamber at heat dissipation room 8 intussuseption, in temperature transmitter work, through regularly changing the interior coolant liquid of heat dissipation room 8, keeps the quick high-efficient radiating effect of heat dissipation room 8 to terminal box 1 inner chamber.

Further, the lower end face of the heat dissipation chamber 8 is flush with the lower end face of the extension pipe 11, and the extension pipe 11 is wrapped in the heat dissipation chamber 8, so that the heat dissipation chamber 8 can also play a role in rapid and efficient heat dissipation of the extension pipe 11.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (7)

1. The utility model provides a quick heat dissipation formula temperature transmitter, includes thermocouple (3), and thermocouple (3) outsourcing has protection tube (2), and thermocouple (3) cold junction is connected with wire (5) and wire (5) stretch out outside protection tube (2) tail end, and protection tube (2) afterbody is connected with terminal box (1), is provided with chip board (7) in terminal box (1), and thermocouple (3) are connected to on chip board (7) through wire (5) electricity, its characterized in that: the terminal box (1) lower terminal surface downwardly extending is provided with extension pipe (11) that are linked together with terminal box (1) inner chamber, extension pipe (11) internal fixation is provided with spacing ring (15) that the through-hole was seted up at the center, protection tube (2) afterbody stretches into extension pipe (11) and is fixed in under spacing ring (15), extension pipe (11) on wire (5) pass spacing ring (15) and stretch into terminal box (1) inner chamber electricity and be connected to on chip board (7), laid heat dissipation silicone grease (13) on terminal box (1) lower terminal surface, wire (5) parcel in heat dissipation silicone grease (13) that stretch into terminal box (1) inner chamber.

2. The rapid thermal dissipation type temperature transmitter of claim 1, wherein: an inner hole of the extension tube (11) above the limiting ring (15) is a unthreaded hole, an inner hole of the extension tube (11) below the limiting ring (15) is a threaded hole, and threads matched with the threaded hole are arranged on the outer side of the tail of the protection tube (2).

3. The rapid thermal dissipation type temperature transmitter of claim 2, wherein: the outer side surface of the limiting ring (15) is also provided with threads matched with the threaded holes.

4. The rapid thermal dissipation type temperature transmitter of claim 1, wherein: the connecting hole (12) for communicating the inner cavity of the junction box (1) with the extension pipe (11) is formed in the lower end face of the junction box (1), and the aperture of the connecting hole (12) is smaller than that of the extension pipe (11).

5. The rapid thermal dissipation type temperature transmitter of claim 1, wherein: the bottom of the junction box (1) is provided with a heat insulation column (14), and the chip board (7) is fixedly arranged on the heat insulation column (14).

6. The rapid thermal dissipation type temperature transmitter of claim 1, wherein: the periphery of the junction box (1) is provided with a radiating chamber (8) in a surrounding mode, and the radiating chamber (8) is provided with a liquid inlet hole (9) and a liquid outlet hole (10).

7. The rapid thermal dissipation type temperature transmitter of claim 6, wherein: the lower end face of the radiating chamber (8) is flush with the lower end face of the extension pipe (11), and the extension pipe (11) is wrapped in the radiating chamber (8).