Waterproof threaded thermocouple

Abstract

The utility model discloses a waterproof thread type thermocouple, which belongs to the technical field of thermocouples and comprises a cold end, one end of the cold end is provided with a hot end, one end of the cold end close to the hot end is provided with a flange plate and an external thread structure, two ends of the cold end are fixedly connected with mounting rings respectively, and a semi-cylindrical protective shell is clamped between the two groups of mounting rings. A sealing strip is arranged on each contact surface of the two groups of semi-cylindrical protective shells and the two groups of mounting rings; according to the waterproof thread type thermocouple, the two sets of semicircular cylinder type protective shells, the sealing strips and the fastening screws are matched with the sealing effect of the wiring box in the wiring area, so that double waterproof barriers can be formed, the condensate water permeation failure rate is greatly reduced, a cable is clamped through the clamping plates, the clamping points of the clamping plates form rigid anchoring points, and the sealing performance of the thermocouple is improved. When the thermocouple vibrates and displaces, the connection part of the cable and the cold end is not dragged, and the looseness of the connection part of the cable and the cold end caused by the vibration displacement of the thermocouple is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to thermocouple technical field, especially waterproof screw thread type thermocouple. BACKGROUND

[0002] Waterproof screw thread type thermocouple is a kind of temperature sensor of special design, composite installation structure of combination thread and flange plate is connected with high-pressure pipeline and other equipment, mainly used for real-time measurement liquid, steam or gas medium temperature, supporting display instrument realizes closed-loop control.Currently in high-pressure pipeline temperature monitoring, thermocouple cold end compensation area usually uses exposed design, but due to the outer wall of pipeline is prone to condensate during long-term operation, it can cause condensate to flow into wiring area along pipeline outer wall or equipment surface, cause condensate to infiltrate risk, and then cause electrical safety hidden danger, such as insulation performance decline, electric leakage or short circuit. SUMMARY

[0003] The utility model discloses to the shortage of prior art, provide waterproof screw thread type thermocouple, to reach the sealing effect of cooperation junction box self, form the purpose of double protection.

[0004] Waterproof screw thread type thermocouple, including cold end, the cold end one end is equipped with hot end, the cold end is installed with flange and external thread structure near hot end one end, the cold end both ends are respectively fixed with mounting ring, and the mounting ring is clamped between two groups, and every contact surface of two groups of half-cylinder type protective shell and two groups of mounting ring is equipped with sealing strip, and two groups of half-cylinder type protective shell edge are fixed with mounting plate, and two groups of mounting plate are fixed through the first cross screw between two groups, and two groups of half-cylinder type protective shell one side are connected with wire routing barrel, the cable that passes through wire routing barrel is equipped with limiting component for fixing cable on hot end one side.

[0005] The limiting component includes support, and the support is fixedly connected to the outer wall of the wire routing barrel away from the half-cylinder type protective shell, and a threaded rod is screwed into the other end of the support, and a clamping plate is rotatably connected to one end of the threaded rod, and a guide rod is slidably connected to the inside of the support.

[0006] The area between the cold end and the clamping plate is provided with a male plug and a female plug, and the male plug and the female plug are connected in plug-in electrical connection.

[0007] The area of the cold end away from the half-cylinder type protective shell is fixedly connected with a limiting ring at both ends, and a slip ring is slidably connected between the two limiting rings on the cold end, and a plurality of return springs are arranged around the slip ring and the limiting ring close to the half-cylinder type protective shell.

[0008] One end of the slip ring is fixedly connected with a conical sleeve, and the other end of the conical sleeve is provided with a sealing ring, and the conical sleeve is made of a deformable high-temperature resistant material.

[0009] The connecting plate is fixedly connected with the edge of the limiting ring close to the semi-cylindrical protective shell, and the second cross screw is installed on the connecting plate.

[0010] The beneficial effects of the present application are:

[0011] The two groups of semi-cylindrical protective shells, the sealing strips and the first cross screws cooperate with the sealing effect of the junction box of the junction area to form a double waterproof barrier, greatly reducing the condensate water penetration failure rate, and the clamping plate clamps the cable, so that the clamping point of the clamping plate forms a rigid anchor point, when the thermocouple vibrates and displaces, the cable and the cold end connection will not be dragged, reducing the loosening of the cable and the cold end connection caused by the vibration and displacement of the thermocouple. By disconnecting the connection between the plug-in male end and the plug-in female end, the thermocouple can be replaced alone, achieving the effect of quickly disassembling the thermocouple and the cable. Compared with the traditional welded connection, the cable needs to be cut and re-welded, which can shorten the maintenance time. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a complete structure schematic view of the present application;

[0013] Figure 2 It is a semi-cylindrical protective shell structure schematic view of the present application;

[0014] Figure 3 It is a plug-in male end and plug-in female end structure schematic view of the present application;

[0015] Figure 4 It is a cold end structure schematic view of the present application.

[0016] REFERENCE SIGNS:

[0017] 1, cold end; 2, hot end; 3, flange plate; 4, mounting ring; 5, semi-cylindrical protective shell; 6, mounting plate; 7, sealing strip; 8, wire winding drum; 9, cable; 10, first cross screw; 11, bracket; 12, screw rod; 13, guide rod; 14, clamping plate; 15, plug-in male end; 16, plug-in female end; 17, limiting ring; 18, slip ring; 19, return spring; 20, conical sleeve; 21, sealing ring; 22, connecting plate; 23, second cross screw. DETAILED DESCRIPTION

[0018] Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. In the following description, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application.

[0019] The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Unless otherwise defined, all terms of art used herein have the same meaning as commonly used in the art to which this application belongs. The use of "first", "second", and "third" or similar terms in the present application is not intended to denote any order, quantity, or importance, but is merely used to distinguish one element from another. Similarly, the use of "one" or "a" or similar terms is not intended to denote a quantity of one, but is intended to denote at least one. "Plural" or "a plurality" means two or more. Unless otherwise indicated, the terms "front", "back", "up", "down", and the like in the description and in the claims, if any, are used for convenience and are not intended to be limiting. The use of the terms "including", "containing", and "comprising" and similar terms in the present application are intended to be inclusive of the elements recited in the "including", "containing", or "comprising" and other similar terms and that not exclude other elements. The use of the terms "connected" and "coupled" and similar terms in the present application are intended to be inclusive of a physical or mechanical connection, or an electrical connection, whether direct or indirect. The use of singular forms in the present application and the claims, if any, is intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "and / or", as used herein, refers to and encompasses any or all possible combinations of one or more of the associated listed items.

[0020] Referring to Figures 1 to 4 As shown, the waterproof screw thread type thermocouple comprises a cold end 1, one end of the cold end 1 is provided with a hot end 2, a flange plate 3 and an external thread structure are installed on one end of the cold end 1 close to the hot end 2, two mounting rings 4 are fixedly connected to two ends of the cold end 1 respectively, two groups of semicylindrical protective shells 5 are clamped between the two groups of mounting rings 4, a sealing strip 7 is arranged on each contact surface of the two groups of semicylindrical protective shells 5 and the two groups of mounting rings 4, mounting plates 6 are fixedly connected to edges of the two groups of semicylindrical protective shells 5, the two groups of mounting plates 6 are fixed through a first cross screw 10, wire winding drums 8 are connected to one side of the two groups of semicylindrical protective shells 5, a cable 9 passes through the wire winding drum 8 on one side of the hot end 2, and a limiting assembly for fixing the cable 9 is arranged on the wire winding drum 8.

[0021] In use, the cold end 1 is fixed on the pipeline temperature measuring point through the flange 3, and the outer threaded structure is tightened to realize mechanical sealing, and the position of the hot end 2 is adjusted to ensure that the depth of the hot end 2 inserted into the inner wall of the pipeline meets the specification. Then, the two sets of semi-cylindrical protective shells 5 are clamped to the mounting ring 4, and after the mounting plate 6 is aligned, the first cross screw 10 is tightened to form a closed cavity. In this step, when the two sets of semi-cylindrical protective shells 5 are aligned, the cable 9 is passed through the wire arrangement cylinder 8, and the installation of the thermocouple is completed. At this time, based on the sealing effect of the junction box in the wiring area, the semi-cylindrical protective shell 5 forms a double waterproof barrier through the sealing strip 7 and the first cross screw 10, which can greatly reduce the condensate penetration failure rate.

[0022] Please refer to Figure 3 As shown, the limiting assembly includes a bracket 11 fixed to the outer wall of the wire arrangement cylinder 8 away from the semi-cylindrical protective shell 5, and a threaded rod 12 is threaded through the other end of the bracket 11. One end of the threaded rod 12 is rotatably connected to a clamping plate 14, and one end of the clamping plate 14 is connected to a guide rod 13 that slides through the inside of the bracket 11. In use, by rotating the two threaded rods 12 and under the guidance of the guide rod 13, the two clamping plates 14 are controlled to move closer to each other, and the cable 9 extending from the wire arrangement cylinder 8 is clamped and fixed. Since the bracket 11 is fixed to the wire arrangement cylinder 8, a fixed reference point relative to the cold end 1 of the thermocouple can be formed, and under the clamping action of the clamping plate 14, the clamping point of the clamping plate 14 forms a rigid anchor point, so that when the thermocouple vibrates and displaces, the cable 9 and the cold end 1 connection will not be dragged, reducing the loosening of the cable 9 and the cold end 1 connection caused by the vibration and displacement of the thermocouple.

[0023] Please refer to Figure 3 As shown, the area between the cable 9 and the clamping plate 14 is provided with a plug-in male end 15 and a plug-in female end 16, and the plug-in male end 15 and the plug-in female end 16 are connected in a plug-in electrical connection. In use, when the thermocouple is damaged, only the connection between the plug-in male end 15 and the plug-in female end 16 needs to be disconnected, and the thermocouple can be replaced individually, achieving the effect of quickly disassembling the thermocouple and the cable 9. Compared with the traditional welding connection, the cable 9 needs to be cut and re-welded, which can shorten the maintenance time.

[0024] Please refer to Figure 4As shown, both ends of the cold end 1, which is away from the semi-cylindrical protective shell 5, are fixedly connected with limiting rings 17. A sliding ring 18 is slidably connected between the two sets of limiting rings 17 on the cold end 1. Multiple sets of return springs 19 are arranged around the sliding ring 18 and the set of limiting rings 17 near the semi-cylindrical protective shell 5. A conical sleeve 20 is fixedly connected to one end of the sliding ring 18, and a sealing ring 21 is provided at the other end of the conical sleeve 20. The conical sleeve 20 is made of deformable high-temperature resistant material. A connecting plate 22 is fixedly connected to the edge of the set of limiting rings 17 near the semi-cylindrical protective shell 5. A second cross screw 23 is installed on the connecting plate 22.

[0025] During operation, the connecting plate 22 is connected to the slip ring 18 by the second cross screw 23, which restricts the initial position of the tapered sleeve 20 and prevents the tapered sleeve 20 from obstructing the installation between the hot end 2 and the equipment. After the thermocouple is installed, the second cross screw 23 is rotated to disengage one end from the slip ring 18. Under the elastic action of multiple sets of return springs 19, the tapered sleeve 20 is pushed to contact the outer wall of the equipment through the sealing ring 21, which improves the sealing performance of the connection between the hot end 2 and the equipment and covers the exposed part of the connection between the two, reducing the corrosion caused by external moisture to the connection, such as the flange 3 and the threaded surface of the external thread structure or the mounting bolts.

[0026] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. Although this application has disclosed the preferred embodiment as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A waterproof threaded thermocouple, including a cold junction (1), characterized in that: The cold end (1) is provided with a hot end (2) at one end. The end of the cold end (1) near the hot end (2) is equipped with a flange (3) and an external thread structure. The two ends of the cold end (1) are respectively fixed with mounting rings (4). A semi-cylindrical protective shell (5) is snapped between the two sets of mounting rings (4). Each contact surface of the two sets of semi-cylindrical protective shells (5) and the two sets of mounting rings (4) is provided with a sealing strip (7). Mounting plates (6) are fixed at the edges of the two sets of semi-cylindrical protective shells (5), and the two sets of mounting plates (6) are fixed together by a first cross screw (10). A cable tray (8) is connected to one side of the two sets of semi-cylindrical protective shells (5). A cable (9) is provided on one side of the hot end (2) through the cable tray (8). A limiting component for fixing the cable (9) is provided on the cable tray (8).

2. The waterproof threaded thermocouple as described in claim 1, characterized in that: The limiting component includes a bracket (11), which is fixed to the outer wall of the end of the cable tray (8) away from the semi-cylindrical protective shell (5), and the other end of the bracket (11) is threaded with a screw (12). One end of the screw (12) is rotatably connected to a clamping plate (14), and one end of the clamping plate (14) is connected to a guide rod (13) that slides through the inside of the bracket (11).

3. The waterproof threaded thermocouple as described in claim 2, characterized in that: The cable (9) is provided with a male plug-in end (15) and a female plug-in end (16) in the area between the cold end (1) and the clamp (14), and the male plug-in end (15) and the female plug-in end (16) are connected by a plug-in electrical connection.

4. The waterproof threaded thermocouple as described in claim 1, characterized in that: Both ends of the cold end (1) away from the semi-cylindrical protective shell (5) are fixed with limiting rings (17), and a slip ring (18) is slidably connected between the two sets of limiting rings (17) on the cold end (1). Multiple sets of return springs (19) are arranged around the slip ring (18) and the set of limiting rings (17) close to the semi-cylindrical protective shell (5).

5. The waterproof threaded thermocouple as described in claim 4, characterized in that: One end of the slip ring (18) is fixedly connected to a conical sleeve (20), and the other end of the conical sleeve (20) is provided with a sealing ring (21). The conical sleeve (20) is made of a deformable high-temperature resistant material.

6. The waterproof threaded thermocouple as described in claim 5, characterized in that: A connecting plate (22) is fixed to the edge of a set of limiting rings (17) near the semi-cylindrical protective shell (5), and a second cross screw (23) is installed on the connecting plate (22).

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