CN216449045U

CN216449045U - Thermocouple process connector

Info

Publication number: CN216449045U
Application number: CN202123157983.4U
Authority: CN
Inventors: 宋钒; 王明济
Original assignee: Anhui Sealong Biotechnology Co ltd
Current assignee: Anhui Sealong Biotechnology Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-05-06
Anticipated expiration: 2031-12-16

Abstract

The utility model discloses a thermocouple process connector which comprises a hollow tubular shell, wherein the shell comprises a first connecting end with external threads and a second connecting end with internal threads, the thermocouple process connector further comprises a first sealing and fixing mechanism for connecting the first connecting end with the end of an explosion-proof junction box, and the thermocouple process connector further comprises a second sealing and fixing mechanism for connecting the second connecting end with an armored thermocouple. The thermocouple process connector can thoroughly prevent water from contacting with the thermocouple, prolongs the service life of the thermocouple, facilitates the timely disassembly and assembly of the thermocouple, reduces the maintenance cost, and plays a certain supporting role on the thermocouple to avoid the influence of external force on the service performance of the thermocouple.

Description

Thermocouple process connector

Technical Field

The utility model relates to the field of machinery, in particular to an armored thermocouple process connector.

Background

It is known that an armored thermocouple is used as a temperature measuring sensor for directly measuring or controlling the temperature of fluid, steam and gas medium and solid surface in the range of 0-1800 deg.C in various production processes, and has the advantages of bending, high pressure resistance, quick thermal response time, firmness and durability, etc. like an industrial assembly thermocouple, it is used as a sensor for measuring temperature, and is usually matched with display instrument, recording instrument and electronic regulator, the armored thermocouple electrode is formed by welding two ends of two conductors with different components to form a loop, the direct temperature measuring end is called a working end, and the terminal end is called a cold end, also called a reference end. When the working end and the reference end have temperature difference, a millivolt signal is generated in the loop, and a display instrument is connected, so that the instrument can indicate the corresponding temperature value of the thermoelectromotive force generated by the thermocouple. The thermoelectromotive force of the armored thermocouple increases along with the temperature rise of the measuring end, and the magnitude of the thermoelectromotive force is only related to the material of the thermocouple conductor and the temperature difference of the two ends and is not related to the length and the diameter of the thermode. The armored thermocouple is structurally characterized in that the armored thermocouple is formed by integrally drawing a conductor, high-insulation magnesium oxide and a stainless steel protective tube sleeved outside the conductor for multiple times. The armored thermocouple product mainly comprises a basic structure consisting of a junction box, a wiring terminal, an armored thermocouple and protection tubes made of different materials, and is matched with various installation and fixing devices, wherein the armored thermocouple is formed by combining and processing a thermocouple wire, an insulating material and a metal protection sleeve. So that it has the advantages of saving material, long service life, good mechanical property, vibration and impact resistance and high pressure resistance. The outer diameter of the armored thermocouple can be processed to be very thin, the minimum outer diameter can be 0.25mm, the length can be very long, and the length of the thermocouple can reach more than one hundred meters, so the armored thermocouple cable is also called as an armored thermocouple cable. The armored thermocouple has great flexibility, the time constant is small, the thermal response time of the armored thermocouple is 0.5-1 s, and the minimum time can reach millisecond magnitude.

It is known that sheathed thermocouples are generally environmentally demanding in natural conditions such as water and snow. The leakage of water, snow and the like may cause corrosion of the armored thermocouple due to the alternation of cold and heat until the armored thermocouple is broken, thereby causing potential safety hazards, for example, indication of the thermocouple may be abnormal, and in severe cases, the thermocouple may be suddenly quenched due to rainwater infiltration, thereby causing burst failure.

Disclosure of Invention

In view of the above-identified problems in the prior art, the present invention provides a thermocouple process connector.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a thermocouple process connector is characterized by comprising a hollow tubular shell, wherein the shell comprises a first connecting end with external threads and a second connecting end with internal threads, the thermocouple process connector further comprises a first sealing and fixing mechanism for connecting the first connecting end with an end of an explosion-proof junction box, and the thermocouple process connector further comprises a second sealing and fixing mechanism for connecting the second connecting end with an armored thermocouple.

The first sealing and fixing mechanism comprises an inner wire fixing nut, the inner wire fixing nut comprises a first inner diameter section and a second inner diameter section, the diameter of the first inner diameter section is matched with the outer diameter of the end of the explosion-proof junction box, the diameter of the second inner diameter section is matched with the outer diameter of the first connecting end, and an inner wire matched with the outer thread of the first connecting end is arranged on the inner wall of the second inner diameter section.

The first sealing and fixing mechanism further comprises a first locking washer, the first locking washer is sleeved on the end of the explosion-proof junction box and located between the internal thread fixing nut and the shell, the cross section of the first locking washer is trapezoidal, and the first inner diameter section and the opposite end of the shell are provided with inclined inner walls matched with the cross section profiles of the first locking washer.

The second sealing and fixing mechanism comprises a flange plate, a connecting terminal is fixed at one end, connected with the shell, of the flange plate, the connecting terminal comprises a third inner diameter section and a fourth inner diameter section, the diameter of the third inner diameter section is matched with the outer diameter of the cable of the armored thermocouple, the inner wall of the fourth inner diameter section is provided with an internal thread and is sleeved with an outer threaded nut of the cable of the armored thermocouple, and the outer wall of the connecting terminal is in threaded connection with the second connecting terminal.

The second sealing mechanism further comprises a second locking washer, the second locking washer is sleeved on the cable of the armored thermocouple and located between the outer screw nut and the connecting terminal, the cross section of the second locking washer is trapezoidal, and an inclined inner wall matched with the cross section contour of the second locking washer is arranged at the opposite end of the connecting terminal and the outer screw nut.

Compared with the prior art, the thermocouple process connector provides a completely sealed installation space through the first sealing fixing mechanism and the second sealing fixing mechanism which are respectively connected with the explosion-proof junction box and the cable of the armored thermocouple, ensures that the armored thermocouple is directly isolated from the outside, thoroughly avoids water from contacting with the thermocouple, prolongs the service life of the thermocouple, is convenient to draw out the thermocouple in time or under a specific requirement when a catalyst needs to be replaced, reduces the maintenance cost of the thermocouple, plays a certain supporting role for the armored thermocouple, and does not avoid the influence of the independent stress of the thermocouple.

Drawings

FIG. 1 is a front view of one embodiment of the present invention.

Description of reference numerals: 1-shell 11-first connection end 12-second connection end 2-first sealing and fixing mechanism 21-internal thread fixing nut 211-first internal diameter section 212-second internal diameter section 22-first locking washer 3-second sealing and fixing mechanism 31-flange plate 32-connection terminal 321-third internal diameter section 322-fourth internal diameter section 33-external thread nut 34-second locking washer 7-explosion-proof junction box 71-end 8-armored thermocouple.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Next, the present invention is described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, the cross-sectional view illustrating the structure of the apparatus is not enlarged partially in general scale for the convenience of illustration, and the drawings are only exemplary, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

Referring to fig. 1, the present embodiment provides a thermocouple process connector including a hollow tube-shaped housing 1, the housing 1 including a first connection end 11 having an external thread and a second connection end 12 having an internal thread, the thermocouple process connector further including a first seal fixing mechanism 2 connecting the first connection end 11 with an end 71 of an explosion-proof junction box 7, and the thermocouple process connector further including a second seal fixing mechanism 3 connecting the second connection end 12 with a sheathed type thermocouple 8.

In the embodiment, the thermocouple process connector is connected with the explosion-proof junction box 7 through the first sealing and fixing mechanism 2, the thermocouple process connector is connected with the armored thermocouple 8 through the second sealing and fixing mechanism 3, a closed space is formed through the connector, substances such as water, snow and the like are prevented from entering the connector to be contacted with the thermocouple in the thermocouple working process, the working stability of the thermocouple is improved, and corrosion and even breakage caused by external factors are avoided.

Further, referring to fig. 1, the first sealing and fixing mechanism 2 includes an inner wire fixing nut 21, the inner wire fixing nut 21 includes a first inner diameter section 211 and a second inner diameter section 212, a diameter of the first inner diameter section 211 matches with an outer diameter of an end 71 of the explosion-proof junction box 7 for forming a seal with the end 71, a diameter of the second inner diameter section 212 matches with an outer diameter of the first connection end 11, and an inner wire matching with an external thread of the first connection end 11 is disposed on an inner wall of the second inner diameter section 212 for connecting the housing 1 to the end 71 of the explosion-proof junction box 7 through the inner wire fixing nut 21.

Furthermore, in order to better increase the connection strength, the first sealing and fixing mechanism 2 further comprises a first locking gasket 22, the first locking gasket 22 is sleeved on the end head 71 of the explosion-proof junction box 7, and is positioned between the internal thread fixing nut 21 and the housing 1, the cross section of the first locking washer 22 is trapezoidal, the opposite end of the first inner diameter section 211 to the housing 1 is provided with an inclined inner wall matching the cross-sectional profile of the first lock washer 22 which, in this embodiment, during screwing of the internal thread fixing nut 21 and the shell 1, the first inner diameter section 211 and the opposite end of the shell 1 are close to each other, their respective inclined inner walls, which exert pressure on the first lock washer 22, cause the first lock washer 22 to lock, thereby increasing the strength of the connection between the thermocouple connector and the explosion-proof junction box 7 while further enhancing the sealing.

Specifically, referring to fig. 1, the second seal fixing mechanism 3 includes a flange 31, a connection terminal 32 is fixed at one end of the flange 31 connected to the housing 1, the connection terminal 32 includes a third inner diameter section 321 and a fourth inner diameter section 322, the diameter of the third inner diameter section 321 matches the outer diameter of the cable of the sheathed thermocouple 8, the inner wall of the fourth inner diameter section 322 is provided with an internal thread and is screwed with an external thread nut 33 sleeved outside the cable of the sheathed thermocouple 8, the outer wall of the connection terminal 32 is screwed with the second connection end 12, in this embodiment, the size of the central hole of the flange 31 is slightly larger than the outer diameter of the cable of the sheathed thermocouple 8, one end of the cable of the sheathed thermocouple 8 passes through the central hole of the flange 31 to enter the housing 1 of the connector, the diameter of the third inner diameter section 321 of the connection terminal 32 matches the outer diameter of the sheathed thermocouple 8 for sealing, the internal threaded hole of the fourth inner diameter section 322 of the connection terminal 32 is used for being screwed with the external threaded nut 33, while the outer wall of the connection terminal 32 is screwed with the second connection end 12 of the housing 1 of the thermocouple connector, so that the second seal fixing mechanism 3 and the cable of the sheathed thermocouple 8 are fixed to each other and form a seal.

Further, referring to fig. 1, the second sealing mechanism further includes a second lock washer 34, the second lock washer 34 is disposed on the cable of the armored thermocouple 8 and located between the outer nut 33 and the connection terminal 32, a cross section of the second lock washer is trapezoidal, and an inclined inner wall matched with a cross section profile of the second lock washer 34 is disposed at an opposite end of the connection terminal 32 and the outer nut 33, in this embodiment, during a screwing process of the outer nut 33 and the connection terminal 32 of the flange 31, opposite ends of the two are close to each other and press the second lock washer 34, so that the second lock washer 34 forms a clasp to the cable of the armored thermocouple 8 radially and inwardly, thereby increasing a connection strength between the second sealing mechanism and the armored thermocouple 8 and increasing a sealing property.

According to the process connector of the armored thermocouple 8, a completely sealed installation space is provided through the first sealing fixing mechanism 2 and the second sealing fixing mechanism 3 which are respectively connected with the explosion-proof junction box 7 and the cable of the armored thermocouple 8, the armored thermocouple 8 is guaranteed to be directly isolated from the outside, contact of rain, snow and the like with the armored thermocouple 8 is avoided, risks of corrosion, breakage and the like of the armored thermocouple 8 due to external factors are reduced, stability of working safety is improved, and maintenance cost is reduced.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.

Claims

1. A thermocouple process connector is characterized by comprising a hollow tubular shell, wherein the shell comprises a first connecting end with external threads and a second connecting end with internal threads, the thermocouple process connector further comprises a first sealing and fixing mechanism for connecting the first connecting end with an end of an explosion-proof junction box, and the thermocouple process connector further comprises a second sealing and fixing mechanism for connecting the second connecting end with an armored thermocouple.

2. The thermocouple process connector according to claim 1, wherein the first seal retaining mechanism includes an internal thread retaining nut including a first inner diameter section having a diameter matching an outer diameter of an end of the explosion proof junction box and a second inner diameter section having a diameter matching an outer diameter of the first connection end, an inner wall of the second inner diameter section providing an internal thread matching an external thread of the first connection end.

3. The thermocouple process connector according to claim 2, wherein the first seal retention mechanism further includes a first lock washer disposed over the terminal end of the explosion proof junction box and between the wire retention nut and the housing, the first lock washer having a trapezoidal cross-section, the first inner diameter section and the opposite end of the housing being provided with an inclined inner wall matching the cross-sectional profile of the first lock washer.

4. The thermocouple process connector according to claim 1, wherein the second seal holding mechanism includes a flange, a connection terminal is fixed to an end of the flange connected to the housing, the connection terminal includes a third inner diameter section and a fourth inner diameter section, a diameter of the third inner diameter section matches an outer diameter of the cable of the sheathed thermocouple, an inner wall of the fourth inner diameter section is provided with an internal thread and is screwed with an external screw nut sleeved outside the cable of the sheathed thermocouple, and an outer wall of the connection terminal is screwed with the second connection terminal.

5. The thermocouple process connector according to claim 4, wherein the second sealing mechanism further comprises a second lock washer disposed over the cable of the sheathed thermocouple and between the outer wire nut and the connection terminal, the second lock washer having a trapezoidal cross-section, the connection terminal being provided with an inclined inner wall at an end opposite the outer wire nut matching a cross-sectional profile of the second lock washer.