Leakage-proof system for armored flexible thermocouple

Abstract

The utility model relates to a leakproof system for armored flexible thermocouples. The leakproof system comprises a flange, a filler sealing mechanism, a sealing cavity type sealing mechanism and a plurality of thermocouples, wherein the sealing cavity type sealing mechanism is adjacent to the filler sealing mechanism; the packing sealing mechanism is installed on one side of the flange, and the sealing cavity type sealing mechanism is in threaded connection with the flange. A leading-out sleeve is further arranged on the outer side of the sealing cavity type sealing mechanism and connected into the sealing cavity type sealing mechanism. The flange is provided with a mounting hole, and the thermocouple penetrates through the flange mounting hole, synchronously penetrates through the sealing filler mechanism and the sealing cavity type sealing mechanism, and penetrates out of a leading-out sleeve on the outer side of the sealing cavity type sealing mechanism; according to the scheme, the situation that the flexible thermocouple can meet the sealing performance requirement can be avoided, double sealing is adopted, and the effect of enhancing and preventing medium leakage is achieved, so that leakage is avoided in the use process, online maintenance can be achieved even if leakage occurs, and use safety is guaranteed.

Description

Technical Field

[0001] This utility model relates to an auxiliary system for temperature measurement in chemical equipment, specifically a leak-proof system for armored flexible thermocouples, belonging to the field of chemical technology. Background Technology

[0002] When measuring the temperature of the reactor bed, flexible thermocouples are used. After being installed from the flange, the thermocouples are fixed at different positions and with different lengths to ensure accurate measurement.

[0003] Since there are many measurement points, multiple flexible thermocouples need to be connected from the same flange. To facilitate installation, the multiple thermocouples are made into a group and fixed on the flange for installation.

[0004] Generally, welding or compression fittings are used for connection. However, defects in the weld joints or loose compression fittings can easily lead to media leakage, which can cause accidents such as fire, explosion, and poisoning. Therefore, it is necessary to optimize and upgrade the leak prevention facilities. Utility Model Content

[0005] In view of the leakage and significant safety hazards of the above-mentioned thermocouple installation methods, the purpose of this utility model is to provide a leak-proof system for armored flexible thermocouples. This solution can prevent the flexible thermocouple from leaking during use, and even if leakage occurs, online maintenance can be achieved to ensure safe use.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: an armored flexible thermocouple leak-proof system, comprising: a flange, a packing sealing mechanism, a sealing cavity type sealing mechanism adjacent to the packing sealing mechanism, and several thermocouples; the packing sealing mechanism is installed on one side of the flange, and the sealing cavity type sealing mechanism is threadedly connected to the flange; an outlet sleeve is also provided on the outside of the sealing cavity type sealing mechanism, and the outlet sleeve is connected to the sealing cavity type sealing mechanism; an installation hole is provided on the flange, and the thermocouple passes through the flange installation hole and simultaneously passes through the sealing packing mechanism and the sealing cavity type sealing mechanism, and exits from the outlet sleeve on the outside of the sealing cavity type sealing mechanism;

[0007] Furthermore, the flange mounting hole includes a large-diameter hole area and a small-diameter hole area to accommodate the packing sealing mechanism and the thermocouple passing through, and the large-diameter hole area and the small-diameter hole area are integrally transitioned; the large-diameter hole area is the accommodating space for the packing sealing mechanism, and the inner diameter of the small-diameter hole area matches the outer diameter of the thermocouple.

[0008] Furthermore, a threaded structure is provided in the large-diameter area of ​​the mounting hole, and the packing sealing mechanism is connected to the large-diameter area of ​​the mounting hole by a spiral; the inner wall of the small-diameter area of ​​the mounting hole has a smooth structure.

[0009] Furthermore, both the sealing packing mechanism and the lead-out sleeve are axially provided with connection holes for thermocouples to pass through, and the horizontal height of the two connection holes is consistent with the horizontal height of the small diameter area of ​​the flange mounting hole.

[0010] Furthermore, the packing sealing mechanism includes: a packing gland, graphite packing, a spring, and a metal washer; the packing gland has a T-shaped structure, and the packing gland is spirally connected to the large-diameter area of ​​the flange mounting hole, and the head end of the packing gland presses the graphite packing into the mounting hole; a spring is also provided at the front end of the graphite packing through a metal washer.

[0011] Furthermore, the sealing cavity type sealing mechanism includes: a sealing cavity, which is a cylindrical structure and threadedly connected to a flange; the sealing cavity has an installation hole that matches the size of the lead-out sleeve, the lead-out sleeve is a T-shaped structure, the front end of the lead-out sleeve is inserted into the installation hole in the sealing cavity, and the rear end of the lead-out sleeve is fixed by a retainer.

[0012] The side of the sealing cavity connected to the lead-out sleeve is the outer side, and the inner side of the sealing cavity is closer to the flange direction;

[0013] Furthermore, the height position of the lead-out sleeve on the outer wall of the sealing cavity is consistent with the height position of the packing sealing mechanism on the flange, thereby ensuring that the center of the lead-out sleeve connection hole and the center of the packing sealing mechanism connection hole are on the same horizontal line.

[0014] In this solution, the packing sealing mechanism and the sealing cavity sealing mechanism in the above structure form a double seal, reducing the risk of media leakage.

[0015] Furthermore, the leak prevention system also includes a leak prevention monitoring mechanism, which includes a pressure gauge and a primary valve; the pressure gauge is connected to the top of the sealed cavity via a pipeline, and the primary valve is installed on the pipeline.

[0016] Furthermore, the leak prevention system also includes a pressure relief valve, which is connected to the bottom of the sealed cavity via a pipeline.

[0017] The beneficial effects of this armored flexible thermocouple leak prevention system are:

[0018] This solution avoids the need for flexible thermocouples to meet sealing requirements and employs double sealing to enhance the prevention of media leakage. Therefore, it does not leak during use, and even if leakage occurs, online maintenance can be performed to ensure safe use.

[0019] In the sealing structure with sealing packing, a spring is designed to achieve the self-sealing function of the packing through the spring preload; the system is also equipped with a monitoring mechanism; it can realize the monitoring of leakage and online maintenance after leakage. Attached Figure Description

[0020] Figure 1 This is a structural diagram of the present invention.

[0021] In the diagram, 1. Flange, 2. Thermocouple, 3. Lead-out sleeve, 4. Lead wire, 5. Packing gland, 6. Graphite packing, 7. Spring, 8. Metal gasket, 9. Sealing cavity, 10. Pressure gauge, 11. Primary valve, 12. Pressure relief valve, 13. Compression fitting. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0023] refer to Figure 1 The illustrated armored flexible thermocouple leak-proof system includes: a flange 1, a packing sealing mechanism, a sealing cavity type sealing mechanism adjacent to the packing sealing mechanism, and several thermocouples 2; the packing sealing mechanism is installed on one side of the flange 1, and the sealing cavity type sealing mechanism is threadedly connected to the flange 1; an outlet sleeve 3 is also provided on the outside of the sealing cavity type sealing mechanism, and the outlet sleeve 3 is connected to the sealing cavity type sealing mechanism; the flange 1 is provided with a mounting hole, and the thermocouples 2 pass through the mounting hole of the flange 1 and simultaneously pass through the packing sealing mechanism and the sealing cavity type sealing mechanism, and exit from the outlet sleeve 3 on the outside of the sealing cavity type sealing mechanism;

[0024] Furthermore, the mounting hole of the flange 1 includes a large-diameter hole area and a small-diameter hole area to accommodate the packing sealing mechanism and the thermocouple through which it passes, and the large-diameter hole area and the small-diameter hole area are integrally transitioned; the large-diameter hole area is the accommodating space for the packing sealing mechanism, and the inner diameter of the small-diameter hole area matches the outer diameter of the thermocouple for inserting the thermocouple.

[0025] Furthermore, a threaded structure is provided in the large-diameter area of ​​the mounting hole, and the packing sealing mechanism is connected to the large-diameter area of ​​the mounting hole by a spiral; the inner wall of the small-diameter area of ​​the mounting hole has a smooth structure, which facilitates the smooth insertion of the thermocouple 2.

[0026] Furthermore, the sealing packing mechanism and the lead-out sleeve 3 are both axially provided with connection holes for thermocouples to pass through, and the horizontal height of the two connection holes is consistent with the horizontal height of the small diameter area of ​​the mounting hole of the flange 1, so that the thermocouple 2 can horizontally pass through the flange 1, the sealing packing mechanism, the sealing cavity type sealing mechanism and the lead-out sleeve 3 provided in the sealing cavity type sealing mechanism.

[0027] Furthermore, the lead 4 in the thermocouple 2 passes through the entire housing of the thermocouple 2 and extends out a section from the lead-out sleeve 3 of the sealed cavity sealing mechanism to form an exposed lead, which is connected to the terminal block.

[0028] Furthermore, the packing sealing mechanism includes: a packing gland 5, graphite packing 6, a spring 7, and a metal washer 8; the packing gland 5 has a T-shaped structure, and the packing gland 5 is spirally connected to the large-diameter area of ​​the mounting hole of the flange 1, and the head end of the packing gland 5 presses the graphite packing 6 into the mounting hole; a spring 7 is also set at the front end of the graphite packing 6 through the metal washer 8; when the packing 6 becomes loose, the spring 7 at the front end of the packing 6 will keep the packing 6 in a compressed state, achieving a self-sealing function.

[0029] Furthermore, the sealing cavity type sealing mechanism includes: a sealing cavity 9, which is a cylindrical structure and threadedly connected to the flange 1; the sealing cavity 9 has an installation hole that matches the size of the lead-out sleeve, the lead-out sleeve 3 is a T-shaped structure, the front end of the lead-out sleeve 3 is inserted into the installation hole in the sealing cavity 9, and the rear end of the lead-out sleeve is connected and fixed by a retainer 13;

[0030] Specifically, the flange 1 has an external thread, and the sealing cavity 9 has an internal thread. The internal thread of the sealing cavity 9 and the external thread of the flange 1 are engaged to seal the flange 1 and the sealing cavity 9 together.

[0031] The side of the sealing cavity 9 connected to the lead-out sleeve 3 is the outer side, and the inner side of the sealing cavity 9 is closer to the flange 1.

[0032] Furthermore, the height position of the lead-out sleeve 3 on the outer wall of the sealing cavity 9 is consistent with the height position of the packing sealing mechanism on the flange 1, thereby ensuring that the center of the lead-out sleeve 3 connection hole and the center of the packing sealing mechanism connection hole are on the same horizontal line.

[0033] Furthermore, the lead 4 in the thermocouple 2 is located inside the sealed cavity 9, forming an exposed area.

[0034] In this solution, the packing sealing mechanism and the sealing cavity sealing mechanism in the above structure form a double seal, reducing the risk of media leakage.

[0035] Furthermore, the leak prevention system also includes a leak prevention monitoring mechanism, which includes a pressure gauge 10 and a primary valve 11. The pressure gauge 10 is connected to the top of the sealing cavity 9 via a pipeline, and the primary valve 11 is installed on the pipeline. When a leak occurs in the system, the leak can be monitored by observing the value displayed on the pressure gauge 10.

[0036] Furthermore, the leak prevention system also includes a pressure relief valve 12, which is connected to the bottom of the sealing cavity 9 via a pipeline. If a leak is detected, the pressure inside the sealing cavity 9 can be released by adjusting the pressure relief valve 12. After disassembling the sealing cavity 9, online sealing maintenance can be achieved by tightening the graphite packing 6.

[0037] The armored flexible thermocouple leak prevention system in this solution is used as a measurement unit at one measurement point for measuring the temperature of the reactor bed. Depending on the specific number of measurement points required by the reactor, multiple leak prevention system measurement units of this solution are connected, and then multiple measurement units are made into a group and fixedly installed on the flange. This embodiment fully demonstrates the structure of one of the three measurement units.

[0038] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "joined," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0041] The above-listed embodiments are merely preferred embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A leak-proof system for armored flexible thermocouples, characterized in that, include: The system includes a flange, a packing seal mechanism, a cavity-type sealing mechanism adjacent to the packing seal mechanism, and several thermocouples. The packing seal mechanism is installed on one side of the flange, and the cavity-type sealing mechanism is threadedly connected to the flange. An outlet sleeve is also provided on the outside of the cavity-type sealing mechanism, and the outlet sleeve is connected to the cavity-type sealing mechanism. The flange has mounting holes, and the thermocouples pass through the flange mounting holes and simultaneously pass through the packing seal mechanism and the cavity-type sealing mechanism, and exit from the outlet sleeve on the outside of the cavity-type sealing mechanism.

2. The armored flexible thermocouple leak-proof system according to claim 1, characterized in that: The flange mounting holes include a large-diameter hole area and a small-diameter hole area to accommodate the packing sealing mechanism and the thermocouple. The large-diameter hole area and the small-diameter hole area are integrally transitioned. The large-diameter hole area is the accommodating space for the packing sealing mechanism, and the inner diameter of the small-diameter hole area matches the outer diameter of the thermocouple.

3. The armored flexible thermocouple leak-proof system according to claim 2, characterized in that: A threaded structure is provided in the large-diameter area of ​​the mounting hole, and the packing sealing mechanism is connected to the large-diameter area of ​​the mounting hole by a thread; the inner wall of the small-diameter area of ​​the mounting hole has a smooth structure.

4. The armored flexible thermocouple leak-proof system according to claim 2, characterized in that: Both the sealing packing mechanism and the lead-out sleeve have axially opened connection holes for thermocouples to pass through, and the horizontal height of the two connection holes is consistent with the horizontal height of the small diameter area of ​​the flange mounting hole.

5. The armored flexible thermocouple leak-proof system according to claim 4, characterized in that: The lead wire in the thermocouple passes through the entire thermocouple housing and extends out of the lead sleeve of the sealed cavity sealing mechanism to form an exposed lead wire, which is connected to the terminal block.

6. The armored flexible thermocouple leak-proof system according to claim 2, characterized in that: The packing sealing mechanism includes: a packing gland, graphite packing, a spring, and a metal washer; the packing gland has a T-shaped structure, and the packing gland is spirally connected to the large-diameter area of ​​the flange mounting hole, and the head end of the packing gland presses the graphite packing against the large-diameter area of ​​the mounting hole; a spring is also provided at the front end of the graphite packing through a metal washer.

7. The armored flexible thermocouple leak-proof system according to claim 1, characterized in that: The sealing cavity type sealing mechanism includes: a sealing cavity, which is a cylindrical structure and threadedly connected to a flange; the sealing cavity has an installation hole that matches the size of the lead-out sleeve, the lead-out sleeve is a T-shaped structure, the front end of the lead-out sleeve is inserted into the installation hole in the sealing cavity, and the rear end of the lead-out sleeve is fixed by a retainer.

8. The armored flexible thermocouple leak-proof system according to claim 7, characterized in that: The side of the sealing cavity connected to the lead-out sleeve is the outer side, and the inner side of the sealing cavity is close to the flange. The height position of the lead-out sleeve on the outer wall of the sealing cavity is consistent with the height position of the packing sealing mechanism on the flange, thereby ensuring that the center of the lead-out sleeve connection hole and the center of the packing sealing mechanism connection hole are on the same horizontal line.

9. A leak-proof system for armored flexible thermocouples according to claim 7, characterized in that: Also includes: A leak prevention monitoring mechanism includes a pressure gauge and a primary valve; the pressure gauge is connected to the top of the sealing cavity via a pipeline, and the primary valve is installed on the pipeline.

10. The armored flexible thermocouple leak-proof system according to claim 7, characterized in that: The leak prevention system also includes a pressure relief valve, which is connected to the bottom of the sealed cavity via a pipeline.

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