CN216695315U

CN216695315U - Leak protection hinders oily temperature measurement thermal resistance

Info

Publication number: CN216695315U
Application number: CN202220354101.9U
Authority: CN
Inventors: 郑浩; 杜映月; 霍娜
Original assignee: Shenyang Xinkaifa Thermoelectric Measurement And Control Instrument Co ltd
Current assignee: Shenyang Xinkaifa Thermoelectric Measurement And Control Instrument Co ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-06-07
Anticipated expiration: 2032-02-22

Abstract

The utility model relates to the technical field of temperature measuring devices, in particular to a leak-proof oil-blocking temperature-measuring thermal resistor which comprises a junction box, a wire holder, a protection tube and a thermal resistor, wherein a fixing nut is fixedly sleeved on the outer wall of the protection tube, a pressing plate is fixedly arranged on the upper surface of the fixing nut, a threaded sleeve in threaded connection with the junction box is fixedly arranged on the upper surface of the pressing plate, a first limiting ring is fixedly arranged on the upper surface of the pressing plate and positioned on the inner side of the threaded sleeve, a first oil-blocking sealing ring is arranged between the first limiting ring and the threaded sleeve, a second limiting ring is fixedly arranged on the lower surface of the junction box and positioned on the inner side of the first limiting ring, and a second oil-blocking sealing ring is arranged between the inner wall of the first limiting ring and the outer wall of the second limiting ring. According to the utility model, the inner and outer three-layer sealing structure is arranged between the junction box and the protection tube through the thread sleeve, the first oil-resistant sealing ring and the second oil-resistant sealing ring, so that the internal structures of the junction box and the protection tube are effectively protected, and the service life of the thermal resistor is prolonged.

Description

Leak protection hinders oily temperature measurement thermal resistance

Technical Field

The utility model relates to the technical field of temperature measuring devices, in particular to a leak-proof oil-resistant temperature measuring 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. When the thermal resistor is installed, the oil leakage and resistance capacity of the thermal resistor needs to be ensured so as to avoid the pollution and damage of oily substances to the interior of the thermal resistor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an oil-leakage-proof temperature-measuring thermal resistor, which solves the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: a leak-proof oil-resistant temperature-measuring thermal resistor comprises a junction box, a junction box fixedly arranged in the junction box, a protection tube fixedly arranged at the bottom of the junction box, and a thermal resistor arranged in the protection tube and electrically connected with the wire holder, wherein the top end of the protection tube extends into the wire box, a fixing nut is fixedly sleeved on the outer wall of the protection tube and positioned below the junction box, a pressing plate is fixedly arranged on the upper surface of the fixing nut, the upper surface of the pressure plate is fixedly provided with a threaded sleeve in threaded connection with the junction box, the upper surface of the pressure plate and the inner side of the threaded sleeve are fixedly provided with a first limiting ring, a first oil-blocking sealing ring which is respectively abutted with the wire holder and the pressing plate is arranged between the first limiting ring and the threaded sleeve, the lower surface of terminal box just is located the inboard fixed second spacing ring that is equipped with of first spacing ring, fixed the inlaying between the inner wall of first spacing ring and the outer wall of second spacing ring is equipped with the second and hinders oily sealing ring.

Optionally, a plurality of annular grooves are formed in the upper surface and the lower surface of the first oil blocking sealing ring, and the annular grooves are uniformly distributed in a concentric circle manner.

Optionally, the forward longitudinal section of the annular groove located on the upper surface of the first oil blocking sealing ring is an isosceles trapezoid with a small top and a large bottom, and the forward longitudinal section of the annular groove located on the lower surface of the first oil blocking sealing ring is an isosceles trapezoid with a large top and a small bottom.

Optionally, the forward longitudinal section of the second oil-blocking sealing ring is circular, and the second oil-blocking sealing ring is connected with the first limiting ring through glue.

Optionally, the inside wall of first spacing ring sets up the first recessed ring that hinders the adaptation of oil seal ring with the second, the forward longitudinal section of first recessed ring is the J font, the second recessed ring that hinders the adaptation of oil seal ring with the second is set up to the outside wall of second spacing ring, the forward longitudinal section of second recessed ring is the font of falling J.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, the inner and outer three-layer sealing structure is arranged between the junction box and the protection tube through the thread sleeve, the first oil-resistant sealing ring and the second oil-resistant sealing ring, so that the internal structures of the junction box and the protection tube are effectively protected, and the service life of the thermal resistor is prolonged;

2. the upper surface and the lower surface of the first oil blocking sealing ring are provided with lip-shaped sealing structures formed by the annular grooves, the anti-leakage oil blocking capacity is high, the first limiting ring and the second limiting ring are arranged near the second oil blocking sealing ring, a labyrinth sealing structure is formed, and the anti-leakage oil blocking capacity is further improved.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a partial cross-sectional view of FIG. 1;

fig. 3 is an enlarged schematic view of a portion a in fig. 2.

In the figure: 1. a junction box; 2. a wire holder; 3. protecting the tube; 4. fixing a nut; 5. pressing a plate; 6. a threaded sleeve; 7. a first limit ring; 8. a first oil-resistant seal ring; 9. a second stop collar; 10. a second oil-resistant sealing ring; 11. an annular groove; 12. a first recessed ring; 13. a second recessed ring; 14. a thermal resistor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): referring to fig. 1-3, the utility model provides a leak-proof oil-blocking temperature-measuring thermal resistor, which includes a terminal box 1, a wire holder 2 fixedly disposed in the terminal box 1, a protection tube 3 fixedly disposed at the bottom of the terminal box 1, and a thermal resistor 14 disposed in the protection tube 3 and electrically connected to the wire holder 2. In terminal box 1 was stretched into on the top of protection tube 3, the fixed fixation nut 4 that has cup jointed in the below that the outer wall of protection tube 3 just was located terminal box 1, through fixation nut 4 and the outer wall interference fit of protection tube 3 for the junction realization of fixation nut 4 and protection tube 3 is sealed. The upper surface integrated into one piece of fixation nut 4 has clamp plate 5, and the upper surface integrated into one piece of clamp plate 5 has the thread bush 6 with terminal box 1 threaded connection, through thread bush 6 and terminal box 1 threaded connection for there is first layer seal structure between clamp plate 5 and the terminal box 1.

The upper surface of the pressing plate 5 and the inner side of the threaded sleeve 6 are integrally formed with a first limiting ring 7, and a first oil blocking sealing ring 8 which is respectively connected with the wire holder 2 and the pressing plate 5 is arranged between the first limiting ring 7 and the threaded sleeve 6 and is a second layer sealing structure between the pressing plate 5 and the junction box 1.

The lower surface of the junction box 1 is fixedly provided with a second limiting ring 9 on the inner side of the first limiting ring 7, and a second oil-blocking sealing ring 10 is fixedly embedded between the inner wall of the first limiting ring 7 and the outer wall of the second limiting ring 9 and is a third-layer sealing structure between the pressing plate 5 and the junction box 1.

This embodiment is through thread bush, first oil seal ring 8 and the second oil seal ring 10 of hindering for have inside and outside three-layer seal structure between terminal box 1 and the protection tube 3, effectively protect the inner structure of terminal box 1 and protection tube 3, improve thermal resistance 14's life.

On the basis of the above embodiments, in this embodiment, the upper and lower surfaces of the first oil seal ring 8 are both provided with a plurality of annular grooves 11, and the plurality of annular grooves are uniformly distributed in a concentric circle manner. The forward longitudinal section of the annular groove 11 on the upper surface of the first oil blocking seal ring 8 is an isosceles trapezoid with a small top and a large bottom, and the forward longitudinal section of the annular groove 11 on the lower surface of the first oil blocking seal ring 8 is an isosceles trapezoid with a large top and a small bottom. The upper surface and the lower surface of the first oil blocking sealing ring 8 are provided with lip-shaped sealing structures formed by annular grooves 11, and the oil leakage prevention and blocking capacity is high.

On the basis of the above embodiments, in this embodiment, the forward longitudinal section of the second oil seal ring 10 is circular, and the second oil seal ring 10 is connected with the first limit ring 7 by glue. The inside wall of first spacing ring 7 is seted up and is hindered the first depressed ring 12 of oil seal ring 10 adaptation with the second, and the forward longitudinal section of first depressed ring 12 is the J font, and the lateral wall of second spacing ring 9 is seted up and is hindered the second depressed ring 13 of oil seal ring 10 adaptation with the second, and the forward longitudinal section of second depressed ring 13 is the font of falling J. A section of labyrinth seal structure is formed between the pressure plate 5 and the junction box 1 and between the first limiting ring 7 and the second limiting ring 9, so that the leakage-proof and oil-resistant capability is strong.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a leak protection hinders oily temperature measurement thermal resistor, includes terminal box (1), fixed wire holder (2) of locating in terminal box (1), fixed protection tube (3) of locating terminal box (1) bottom to and locate in protection tube (3) and with wire holder (2) electric connection's thermal resistor (14), its characterized in that: the top end of the protection tube (3) extends into the junction box (1), a fixing nut (4) is fixedly sleeved on the outer wall of the protection tube (3) and positioned below the junction box (1), a pressing plate (5) is fixedly arranged on the upper surface of the fixing nut (4), a thread sleeve (6) in threaded connection with the junction box (1) is fixedly arranged on the upper surface of the pressing plate (5), a first limiting ring (7) is fixedly arranged on the upper surface of the pressure plate (5) and positioned on the inner side of the threaded sleeve (6), a first oil-blocking sealing ring (8) which is respectively abutted against the wire holder (2) and the pressing plate (5) is arranged between the first limiting ring (7) and the thread bush (6), a second limiting ring (9) is fixedly arranged on the lower surface of the junction box (1) and positioned on the inner side of the first limiting ring (7), and a second oil-resistant sealing ring (10) is fixedly embedded between the inner wall of the first limiting ring (7) and the outer wall of the second limiting ring (9).

2. The leak-proof oil-resistant temperature-measuring thermal resistor of claim 1, which is characterized in that: a plurality of annular grooves (11) are formed in the upper surface and the lower surface of the first oil blocking sealing ring (8) and are uniformly distributed in a concentric circle mode.

3. The leak-proof oil-resistant temperature-measuring thermal resistor of claim 2, wherein: the forward longitudinal section of the annular groove (11) on the upper surface of the first oil blocking sealing ring (8) is an isosceles trapezoid with a small upper part and a large lower part, and the forward longitudinal section of the annular groove (11) on the lower surface of the first oil blocking sealing ring (8) is an isosceles trapezoid with a large upper part and a small lower part.

4. The leak-proof oil-resistant temperature-measuring thermal resistor of claim 1, which is characterized in that: the positive longitudinal section of the second oil-resistant sealing ring (10) is circular, and the second oil-resistant sealing ring (10) is connected with the first limiting ring (7) in a gluing mode.

5. The leak-proof oil-resistant temperature-measuring thermal resistor of claim 4, wherein: the inside wall of first spacing ring (7) is seted up and is hindered first sunken ring (12) of oil seal ring (10) adaptation with the second, the forward longitudinal section of first sunken ring (12) is the J font, the lateral wall of second spacing ring (9) is seted up and is hindered second sunken ring (13) of oil seal ring (10) adaptation with the second, the forward longitudinal section of second sunken ring (13) is the shape of falling J font.