CN216116413U

CN216116413U - Corrosion-resistant armored thermocouple

Info

Publication number: CN216116413U
Application number: CN202122316677.4U
Authority: CN
Inventors: 谌军; 张焕炳
Original assignee: Shaoxing Shangyu Shenzhou Instrumentation Co ltd
Current assignee: Shaoxing Shangyu Shenzhou Instrumentation Co ltd
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2022-03-22
Anticipated expiration: 2031-09-24

Abstract

The utility model discloses an anti-corrosion armored thermocouple, which comprises an outer tube, a junction box, a wiring tube and a temperature sensing assembly, wherein the outer tube is connected with the junction box; the surface of the outer pipe is symmetrically provided with two through holes; the temperature sensing assembly comprises a shell, a platinum thermal resistance element, a wiring terminal and a locking block; the shell is provided with a column hole; a first spring is fixed between the locking block and the column hole; the shell is provided with a positioning strip; the outer pipe is provided with a positioning groove; according to the utility model, the locking block is inserted between the column hole and the through hole through the first spring, and the outer pipe is connected with the temperature sensing assembly, so that the problem that the platinum thermal resistance element is not easy to replace because the outer pipe is connected with the platinum thermal resistance element through the thread in the prior art is solved, and the maintenance of the platinum thermal resistance element by workers is more convenient; through the cooperation of location strip and constant head tank, fix a position the locking piece when installation temperature sensing subassembly, ensure to connect firmly, guarantee the junction box simultaneously and connect the end stable connection.

Description

Corrosion-resistant armored thermocouple

Technical Field

The utility model belongs to the technical field of armored platinum thermocouples, and particularly relates to an anti-corrosion armored thermocouple.

Background

An armored platinum resistance as a temperature sensor features that when the temperature of material is changed, its resistance value is changed, and when the resistance value is changed, the working meter can display the temp value correspondent to the resistance value, and it is smaller than that of assembled platinum resistance, and is easy to bend, and is suitable for being installed in the special places of pipeline, such as narrow pipeline, quick response and miniature, etc..

In chinese patent publication No. CN203274948U, an armored platinum thermal resistor is disclosed, in which insulating powder is encapsulated in a metal tube, a platinum thermal resistor element is placed in the insulating powder, a metal lead wire is inserted into the insulating powder and welded with the platinum thermal resistor element, and the metal tube and a junction box are fixedly connected by drawing and compacting into a whole, so that the platinum thermal resistor element can be conveniently taken out from the metal tube; however, this approach has significant drawbacks: the platinum resistance element sets up inside the metal pipe to insulating powder has certain barrier property to thermal propagation, and then has certain error when leading to platinum resistance element to measure ambient temperature, has reduced the practicality, is unfavorable for using widely.

SUMMERY OF THE UTILITY MODEL

The utility model provides a corrosion-resistant armored thermocouple which is convenient to maintain in order to overcome the defects of the prior art.

The technical scheme provided by the utility model is as follows: an anti-corrosion armored thermocouple comprises an outer tube, a junction box arranged at the top of the outer tube, a junction tube inserted in the junction box and the outer tube, a temperature sensing assembly fixed at the bottom of the outer tube, and a flange plate arranged on the surface of the outer tube; the surface of the outer pipe is symmetrically provided with two through holes; the temperature sensing assembly comprises a shell inserted at the bottom of the outer pipe, a platinum thermal resistance element fixed in the shell, a terminal arranged on the platinum thermal resistance element, and two locking blocks symmetrically arranged on the shell; the top of the wiring terminal is electrically connected with the wiring tube; two column holes are symmetrically arranged on the shell; the column hole is opposite to the through hole; the locking block is positioned between the through hole and the column hole; a first spring is fixed between the locking block and the column hole; a plurality of positioning strips are arranged on the shell; the bottom of the outer pipe is provided with a plurality of positioning grooves; the positioning strips are inserted into the positioning grooves in a one-to-one correspondence manner.

Furthermore, a blocking piece is arranged at the bottom of the locking block; the bottom of the column hole is provided with a sliding chute; the baffle plate is inserted into the sliding groove; the sliding chute is internally connected with a push block in a sliding way; one side of the push block is abutted against the baffle plate; the bottom of the push block penetrates out of the sliding groove and is provided with a clamping ring; the shell is sleeved with a sliding block; a clamping groove is formed in the sliding block; the clamping ring is embedded into the clamping groove.

Furthermore, a ring block is arranged at the top of the sliding block; the bottom of the outer pipe is provided with a ring groove; the ring block is inserted into the ring groove; the outer side of the ring groove is symmetrically connected with two locking strips in a sliding manner; a second spring is fixed between the locking bar and the inner wall of the outer tube; two notches are symmetrically arranged on the ring block; one end of the locking bar can be inserted into the notch; an L-shaped groove is formed in one side of the notch; the L-shaped groove is communicated with the notch.

Further, a sleeve is sleeved on the outer pipe; the middle part of the inner side of the sleeve is provided with a threaded hole; the middle part of the outer pipe is provided with an external thread; the external thread is embedded with the threaded hole; the surface of the shell and the bottom of the flange plate are sleeved with anticorrosive layers; the two anti-corrosion layers are respectively embedded at the top end and the bottom end of the sleeve; the bottom end of the sleeve is positioned below the sliding block.

Further, a third spring is fixed on the inner side of the bottom of the sleeve; the top of the third spring is connected with the ring piece; the top of the ring piece and the bottom of the sliding block are provided with semicircular grooves; the semi-circular groove is connected with a plurality of balls in a sliding manner; a plurality of guide rods are arranged on the inner side of the bottom of the sleeve; the bottom of the ring piece is provided with a plurality of inserting rods which are in one-to-one correspondence with the guide rods; the guide rod is inserted into the inserted rod; the bottom of the sliding block is provided with connecting holes which are in one-to-one correspondence with the guide rods; the guide rod can be inserted into the connecting hole.

In conclusion, the locking block is inserted between the column hole and the through hole through the first spring, the outer pipe is connected with the temperature sensing assembly, the problem that the platinum thermal resistance element is not easy to replace due to the fact that the outer pipe is connected with the platinum thermal resistance element through the threaded connection in the prior art is solved, and the platinum thermal resistance element is convenient to overhaul by workers; through the matching of the positioning strip and the positioning groove, the locking block is positioned when the temperature sensing assembly is installed, so that the connection stability is ensured, and meanwhile, the stable connection of the wiring pipe and the wiring terminal is ensured; and the bottom of the shell penetrates out of the outer pipe, so that the detection precision of the platinum thermal resistance element on the external temperature is ensured.

Drawings

FIG. 1 is a top view of the present invention.

Fig. 2 is an isometric cross-sectional view taken along line a-a of fig. 1.

Fig. 3 is a partially enlarged view of a portion C in fig. 2.

Fig. 4 is a partially enlarged view of a portion D in fig. 2.

Fig. 5 is a partially enlarged view of a portion E in fig. 2.

Fig. 6 is an isometric cross-sectional view taken along line B-B of fig. 1.

Fig. 7 is a partially enlarged view of portion F of fig. 6.

Fig. 8 is a schematic structural diagram of the slider in fig. 5.

Detailed Description

In order to make the technical solutions of 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 drawings in the embodiments of the present invention.

As shown in fig. 1-8, an anti-corrosion armored thermocouple comprises an outer tube 1, a junction box 2, a junction tube 3, a temperature sensing assembly 4 and a flange 5; the junction box 2 is arranged at the top of the outer tube 1, the temperature sensing assembly 4 is fixed at the bottom of the outer tube 1, the junction tube 3 is inserted into the outer tube 1, and the top end of the junction tube is electrically connected with the junction box 2; the connecting piece is arranged on the surface of the outer pipe 1 and used for fixing the outer pipe 1 to the existing working equipment; the temperature sensing assembly 4 comprises a shell 41, a platinum thermal resistance element 42, a terminal 43 and a locking block 44; the bottom surface of the outer tube 1 is symmetrically provided with two through holes 11; the casing 41 is inserted into the bottom of the outer tube 1, and is used for installing the platinum heat resistance element 42 on the outer tube 1 and providing protection for the platinum heat resistance element 42 positioned in the casing; the wiring terminal 43 is arranged at the top of the platinum thermal resistance element 42, two ends of the wiring terminal are respectively and electrically connected with the wiring tube 3, namely the platinum thermal resistance element 42, and the top end of the wiring terminal is inserted into the wiring tube 3, so that the wiring terminal is convenient to disassemble; the two locking blocks 44 are symmetrically arranged on the shell 41; two column holes 411 are symmetrically arranged on the shell 41; the two column holes 411 are respectively opposite to the two through holes 11; the two locking blocks 44 are respectively connected in the two column holes 411 in a sliding manner, a first spring 441 is fixed between the two locking blocks, one end of each locking block 44 is inserted into the through hole 11 under the action of the first spring 441, so that the shell 41 is fixed at the bottom of the outer tube 1, the locking blocks 44 can be conveniently removed from the through holes 11 by pressing, and the shell 41 and the platinum heat resistance element 42 can be conveniently disassembled; a plurality of positioning bars 412 are arranged on the shell 41; the bottom of the outer tube 1 is provided with a plurality of positioning grooves 12 corresponding to the positioning strips 412 one by one, and the positioning strips 412 are inserted into the positioning grooves 12 to position the shell 41, so that the locking blocks 44 are accurately inserted into the through holes 11, and meanwhile, the stable connection between the wiring tube 3 and the wiring terminals 43 is ensured; the flange 5 is used for integrally fixing the armored platinum thermocouple to the working equipment, and the connection mode of the flange and the working equipment is the same as that of the prior art, and the detailed description is omitted.

Further, a blocking piece 442 is arranged at the bottom of the locking block 44; the bottom of the column hole 411 is provided with a sliding groove 413, and the blocking piece 442 is inserted into the sliding groove 413; a push block 45 is connected in the sliding groove 413 in a sliding mode, one side of the push block 45 abuts against the blocking piece 442, the bottom of the push block extends out of the sliding groove 413 from the outer side of the sliding groove 413, and a clamping ring 46 is arranged; a sliding block 47 is sleeved on the shell 41, a clamping groove 48 is formed in the sliding block 47, and the clamping ring 46 is embedded into the clamping groove 48; after the locking piece 44 is inserted into the through hole 11, the clamping groove 48 drives the clamping ring 46 to move upwards by pushing the sliding block 47 upwards, the pushing block 45 moves upwards along the sliding groove 413, the top of the pushing block 45 extrudes the side of the blocking piece 442 to limit the sliding of the locking piece 44, and the locking piece 44 is prevented from shaking to be separated from the through hole 11 under the influence of the external environment.

Further, a ring 471 is arranged at the top of the sliding block 47; the bottom of the outer pipe 1 is provided with a ring groove 13, and a ring block 471 is inserted into the ring groove 13; two locking strips 14 are symmetrically and horizontally arranged on the outer side of the ring groove 13, the locking strips 14 are connected with the outer pipe 1 in a sliding mode, and a second spring 15 is fixed between the locking strips 14 and the inner wall of the outer pipe 1; two notches 472 are symmetrically arranged on the ring block 471, and the end parts of the two locking strips 14 can be inserted into one notch 472 respectively; an L-shaped groove 473 is arranged on one side of the notch 472, and the L-shaped groove 473 is communicated with the notch 472; when the sliding block 47 moves upwards to stop the pushing block 45 at the side of the blocking piece 442, the ring block 471 is inserted into the sliding groove 413, the sliding block 47 is rotated to enable the locking bar 14 to be inserted into the notch 472 under the action of the second spring 15, the sliding block 47 is prevented from moving downwards to reset, the pushing block 45 can be ensured to be kept stable in the sliding groove 413, and the firmness of connection between the outer tube 1 and the shell 41 is improved; when the housing 41 is disassembled, the slider 47 is rotated in the reverse direction to move the lock bar 14 into the L-shaped slot 473, and then the slider 47 is moved downward to move the lock bar 14 out of the L-shaped slot 473, thereby facilitating the disassembly of the housing 41.

Further, a sleeve 6 is sleeved on the outer pipe 1; the sleeve 6 is positioned below the flange plate 5, the bottom of the sleeve is sleeved outside the shell 41, and the sleeve and the surface of the shell 41 are subjected to sealing treatment; the middle part of the inner side of the sleeve 6 is provided with a threaded hole 61; the middle part of the outer tube 1 is provided with an external thread 16, the external thread 16 is embedded with the threaded hole 61, so that the sleeve 6 is fixed on the outer tube 1, and the bottom end of the sleeve 6 is positioned below the sliding block 47, so that the sliding groove 413 and the through hole 11 are isolated from the outside after the shell 41 is fixed at the bottom of the outer tube 1; the surface of the shell 41 and the bottom of the flange plate 5 are respectively sleeved with an anticorrosive coating 7, the anticorrosive coatings 7 are purchased from the market, the two anticorrosive coatings 7 are respectively embedded at the top end and the bottom end of the sleeve 6, the corrosion resistance of the thermocouple is enhanced, the first spring 441, the second spring 15, the external thread 16 and the threaded hole 61 are prevented from being corroded by the external working environment, and the smooth assembly and disassembly of all parts of the armored thermocouple are ensured.

Further, a third spring 62 is fixed on the inner side of the bottom of the sleeve 6, and the top of the third spring 62 is fixedly connected with a ring piece 63; the top of the ring piece 63 and the bottom of the sliding block 47 are provided with semicircular grooves 64, and a plurality of balls 65 are connected in the semicircular grooves 64 in a sliding manner; a plurality of guide rods 66 are arranged on the inner side of the bottom of the sleeve 6; the bottom of the ring piece 63 is provided with a plurality of inserted rods 67 which are in one-to-one correspondence with the guide rods 66, and the guide rods 66 are inserted into the inserted rods 67; the bottom of the slider 47 is provided with connecting holes 474 corresponding one-to-one to the guide rods 66.

After the locking block 44 is inserted into the through hole 11, the threaded hole 61 is gradually embedded with the external thread 16 by moving up and rotating the sleeve 6, in the process, the third spring 62 pushes the ring piece 63 to move up, and the sliding block 47 moves up linearly under the matching of the ball 65 and the semicircular groove 64 until the ring block 471 is completely inserted into the annular groove 13; when the sleeve 6 moves upwards continuously, the third spring 62 is compressed, the top of the guide rod 66 is gradually inserted into the connecting hole 474, and the sliding block 47 is driven to rotate when the ring sleeve is rotated continuously, so that the locking bar 14 is inserted into the notch 472, and the installation of the shell 41 is completed; the top of the guide rod 66 is arc-shaped, so that the guide rod can be conveniently inserted into the connecting hole 474 in the process of rotating along with the sleeve 6; the matching of the inserted link 67 and the guiding link 66 enables the ring piece 63 to synchronously rotate along with the sleeve 6, so as to avoid the damage of the third spring 62; when the temperature sensing assembly 4 needs to be replaced, the sleeve 6 is rotated reversely to enable the guide rod 66 to be separated from the connecting hole 474, the locking bar 14 is rotated into the L-shaped groove 473 in the process, the sleeve 6 is continuously rotated to enable the threaded hole 61 to be separated from the external thread 16, the third spring 62 is reset, and then the sleeve 6 can be taken down from the outer tube 1; after the sleeve 6 is taken down, the sliding block 47 is pulled down to separate the ring block 471 from the ring groove 13, the pushing block 45 moves down to separate from the blocking piece 442, and the temperature sensing assembly 4 can be taken down from the bottom of the outer tube 1 after the locking block 44 is pressed, so that the temperature sensing assembly 4 is convenient to replace and maintain.

Claims

1. An anti-corrosion armored thermocouple comprises an outer tube (1), a junction box (2) arranged at the top of the outer tube (1), a wiring tube (3) inserted in the junction box (2) and the inner part of the outer tube (1), a temperature sensing assembly (4) fixed at the bottom of the outer tube (1), and a flange (5) arranged on the surface of the outer tube (1); the method is characterized in that: the surface of the outer pipe (1) is symmetrically provided with two through holes (11); the temperature sensing assembly (4) comprises a shell (41) inserted at the bottom of the outer tube (1), a platinum thermal resistance element (42) fixed in the shell (41), a terminal (43) arranged on the platinum thermal resistance element (42), and two locking blocks (44) symmetrically arranged on the shell (41); the top of the terminal (43) is electrically connected with the junction tube (3); two column holes (411) are symmetrically arranged on the shell (41); the column hole (411) is opposite to the through hole (11); the locking block (44) is positioned between the through hole (11) and the column hole (411); a first spring (441) is fixed between the locking block (44) and the column hole (411); a plurality of positioning strips (412) are arranged on the shell (41); the bottom of the outer pipe (1) is provided with a plurality of positioning grooves (12); the positioning strips (412) are inserted into the positioning grooves (12) in a one-to-one correspondence manner.

2. A corrosion resistant sheathed thermocouple according to claim 1, in which: a blocking piece (442) is arranged at the bottom of the locking block (44); the bottom of the column hole (411) is provided with a sliding groove (413); the baffle sheet (442) is inserted into the sliding groove (413); the sliding groove (413) is connected with a push block (45) in a sliding way; one side of the push block (45) is abutted against the baffle sheet (442); the bottom of the push block (45) penetrates out of the sliding groove (413) and is provided with a clamping ring (46); the shell (41) is sleeved with a sliding block (47); a clamping groove (48) is arranged on the sliding block (47); the clamping ring (46) is embedded into the clamping groove (48).

3. A corrosion resistant sheathed thermocouple according to claim 2, in which: a ring block (471) is arranged at the top of the sliding block (47); the bottom of the outer pipe (1) is provided with a ring groove (13); the ring block (471) is inserted into the ring groove (13); the outer side of the ring groove (13) is symmetrically connected with two locking strips (14) in a sliding manner; a second spring (15) is fixed between the locking bar (14) and the inner wall of the outer tube (1); two notches (472) are symmetrically arranged on the ring block (471); one end of the locking bar (14) can be inserted into the notch (472); an L-shaped groove (473) is formed in one side of the notch (472); the L-shaped groove (473) is communicated with the notch (472).

4. A corrosion resistant sheathed thermocouple according to claim 2, in which: the outer pipe (1) is sleeved with a sleeve (6); a threaded hole (61) is formed in the middle of the inner side of the sleeve (6); the middle part of the outer pipe (1) is provided with an external thread (16); the external thread (16) is mutually embedded with the threaded hole (61); the surface of the shell (41) and the bottom of the flange plate (5) are sleeved with an anticorrosive layer (7); the two anti-corrosion layers (7) are respectively embedded at the top end and the bottom end of the sleeve (6); the bottom end of the sleeve (6) is positioned below the sliding block (47).

5. A corrosion resistant sheathed thermocouple according to claim 4, in which: a third spring (62) is fixed on the inner side of the bottom of the sleeve (6); the top of the third spring (62) is connected with the ring piece (63); the top of the ring piece (63) and the bottom of the sliding block (47) are provided with semicircular grooves (64); a plurality of balls (65) are connected in the semicircular grooves (64) in a sliding manner; a plurality of guide rods (66) are arranged on the inner side of the bottom of the sleeve (6); the bottom of the ring piece (63) is provided with a plurality of inserted rods (67) which are in one-to-one correspondence with the guide rods (66); the guide rod (66) is inserted into the insert rod (67); the bottom of the sliding block (47) is provided with connecting holes (474) which are in one-to-one correspondence with the guide rods (66); the guide rod (66) is insertable into the connection hole (474).