An elastic sealing type inspection sampling joint suitable for high-temperature pressure-bearing equipment

Abstract

The utility model discloses a kind of elastic sealing type inspection sampling connector suitable for high-temperature pressure-bearing equipment, belong to fluid machinery and sealing technical field, including connector body, one end of its connector body is fixedly connected with installation interface, the other end of connector body is fixedly connected with connecting port, the inner cavity lateral wall of connector body and connecting port is equipped with sensing cavity, the inside lateral wall of sensing cavity is fixedly connected with protective sleeve, the inside of protective sleeve is fixedly connected with heat insulating sleeve, the inner cavity bottom of heat insulating sleeve is fixedly connected with leak detector, it is cooperated with the synergic cooperation of expansion block, lip seal ring and graphite seal ring, realizes the self-adapting enhancement of sealing specific pressure under high-temperature working condition, effectively compensates the sealing performance attenuation caused by thermal relaxation or material creep, simultaneously through the intercoordination of clamping block and clamping groove, ensure that expansion block, lip seal ring and graphite seal ring maintain stable assembly relationship in repeated thermal cycle, significantly improve the long-term reliability and anti-failure ability of sealing system.

Description

Technical Field

[0001] This utility model relates to the field of fluid machinery and sealing technology, and more specifically, to an elastic sealing inspection and sampling joint suitable for high-temperature pressure equipment. Background Technology

[0002] The elastic sealing sampling joint for high-temperature pressure equipment is a special connector installed on high-temperature and high-pressure systems such as boilers, reactors, or high-pressure pipelines. It is used to safely extract media samples without interrupting process operation. It is usually made of heat-resistant metal and relies on the mechanical compression force generated by tightening the threads to deform the sealing ring, thereby forming a static seal between the joint body and the equipment interface.

[0003] In existing technology, the connector is screwed into the sampling port of the high-temperature and high-pressure equipment through the external thread of the installation interface, so that the sealing ring at the rear end of the connector body is pressed against the end face or inner wall of the equipment. The medium is discharged through the sampling interface, the connection interface and the internal flow channel, thereby realizing safe online sampling of the medium under high temperature and high pressure conditions.

[0004] In practical applications, existing technologies lack real-time sensing of the actual temperature and pressure of the internal area, making it impossible to promptly identify the deterioration or leakage of the sealing ring, which affects the safety of the sampling process and the accuracy of the monitoring data. Therefore, an elastic sealing inspection and sampling joint suitable for high-temperature pressure equipment is proposed. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] To address the problems existing in the prior art, the purpose of this utility model is to provide an elastically sealed inspection and sampling joint suitable for high-temperature pressure equipment. Through the coordinated operation of an expansion block, a lip seal, and a graphite seal, it achieves adaptive enhancement of the sealing specific pressure under high-temperature conditions, effectively compensating for the attenuation of sealing performance caused by thermal relaxation or material creep.

[0007] 2. Technical Solution

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] A flexible, sealed inspection and sampling connector suitable for high-temperature pressure equipment includes a connector body. One end of the connector body is fixedly connected to an installation interface, and the other end of the connector body is fixedly connected to a connection port. A sensing cavity is formed in the inner sidewall of the connector body and the connection port. A protective sleeve is fixedly connected to the inner sidewall of the sensing cavity. A heat insulation sleeve is fixedly connected inside the protective sleeve. A leak detector is fixedly connected to the bottom of the inner cavity of the heat insulation sleeve. A sealing groove is formed inside the connector body. A lip seal is fixedly connected to the inner cavity of the sealing groove. An expansion block is fixedly connected to the outer surface of the lip seal. A graphite seal is installed on the outer surface of the expansion block.

[0010] Furthermore, the lip seal ring has multiple slots inside, and the graphite seal ring has multiple blocks fixedly connected to its outer surface, with the blocks engaging with the slots.

[0011] Furthermore, the connector body and the connection port are provided with micro pressure holes, one end of which extends into the inner cavity of the protective sleeve.

[0012] Furthermore, a K-type thermocouple and a pressure sensor are fixedly connected to the inner cavity of the protective sleeve.

[0013] Furthermore, a sintered metal filter is fixedly connected inside the micro-pressure hole, and the expansion block is made of a heat-expanding material.

[0014] Furthermore, a sampling interface is fixedly connected to one end of the connection port, and the heat insulation sleeve is made of ceramic fiber material.

[0015] 3. Beneficial effects

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] (1) This solution achieves adaptive enhancement of sealing specific pressure under high temperature conditions through the coordinated cooperation of expansion block, lip seal ring and graphite seal ring, effectively compensating for the attenuation of sealing performance caused by thermal relaxation or material creep. At the same time, through the mutual cooperation of the card block and the card groove, it ensures that the expansion block, lip seal ring and graphite seal ring maintain a stable assembly relationship in repeated thermal cycles, significantly improving the long-term reliability and failure resistance of the sealing system, and fundamentally reducing the risk of medium leakage caused by seal degradation under high temperature and pressure environment.

[0018] (2) By using K-type thermocouples, pressure sensors and leak detectors, and in combination with micro pressure inlet, sintered metal filter and ceramic fiber insulation sleeve, real-time perception and remote early warning of temperature, system pressure and leakage status inside the joint body are realized. This allows for timely identification of early signs of seal deterioration, and also ensures the safety and controllability of the sampling process and the authenticity and accuracy of the monitoring data. This greatly improves the intelligence level and operational continuity of online inspection of high-temperature pressure systems. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a partial structural cross-sectional view of the present invention.

[0021] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0022] Figure 4 This is a partial structural breakdown diagram of the present invention.

[0023] Explanation of the labels in the diagram:

[0024] 1. Connector body; 2. Mounting interface; 3. Connection port; 4. Sampling interface; 5. Protective sleeve; 6. Sealing groove; 7. Lip seal; 8. Expansion block; 9. Graphite seal; 11. Insulation sleeve; 12. Type K thermocouple; 13. Pressure sensor; 14. Leak detector; 15. Micro pressure tap; 16. Sintered metal filter; 17. Locking block; 18. Locking groove. Detailed Implementation

[0025] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Example 1:

[0029] Please see Figure 1 - Figure 4 A flexible, sealed sampling connector for high-temperature pressure equipment includes a connector body 1, which is a hollow cylinder with an internal through-flow channel for media conduction. One end of the connector body 1 is fixedly connected to an installation interface 2, through which it can be screwed into the sampling port of high-temperature pressure equipment such as boilers, reactors, or high-pressure pipelines. The other end of the connector body 1 is fixedly connected to a connection port 3. A sensing cavity is formed on the inner sidewall of the connector body 1 and the connection port 3. A protective sleeve 5 is fixedly connected to the inner sidewall of the sensing cavity, and a heat insulation sleeve 11 is fixedly connected inside the protective sleeve 5 for heat insulation. The sleeve 11 is made of ceramic fiber material, and the protective sleeve 5 is made of stainless steel thin-walled tube. The heat insulation sleeve 11 can effectively block the external high temperature from being conducted to the sensing element. A leak detector 14 is fixedly connected to the bottom of the inner cavity of the heat insulation sleeve 11. A sealing groove 6 is opened inside the connector body 1. A lip seal 7 is fixedly connected to the inner cavity of the sealing groove 6. An expansion block 8 is fixedly connected to the outer surface of the lip seal 7. The expansion block 8 is made of a heat-expanding material, preferably expanded graphite or graphite metal composite material. Its volume increases significantly when the temperature rises. A graphite seal 9 is installed on the outer surface of the expansion block 8.

[0030] Specifically, the lip seal 7 has multiple slots 18 inside, and the graphite seal 9 has multiple blocks 17 fixedly connected to its outer surface. The blocks 17 engage with the slots 18. One end of the connection port 3 is fixedly connected to a sampling interface 4. The connector body 1 and the connection port 3 have micro-pressure holes 15 inside. One end of the micro-pressure hole 15 extends into the inner cavity of the protective sleeve 5. The inner cavity of the protective sleeve 5 is fixedly connected to a K-type thermocouple 12 and a pressure sensor 13. The leakage detector 14 monitors in real time whether there is media leakage in the sealing area. At the same time, the K-type thermocouple 12 senses the temperature of the connector body 1, and the pressure sensor 13 is directly opposite the outlet of the micro-pressure hole 15 to receive the pressure signal of the device. The micro-pressure hole 15 is fixedly connected to a sintered metal filter 16 inside. The sintered metal filter 16 can intercept solid particles and prevent the micro-pressure hole 15 from becoming blocked.

[0031] Furthermore, by screwing the connector body 1 into the sampling port of the high-temperature pressure equipment through the installation interface 2, the graphite sealing ring 9 is pressed against the inner wall or end face of the equipment to form an initial seal. When the device heats up, the expansion block 8 expands in volume due to heat, pushing the graphite sealing ring 9 to move further outward, thereby effectively compensating for the seal deterioration caused by thermal relaxation or deformation. At the same time, the K-type thermocouple 12 continuously monitors the temperature change of the connector body 1, the pressure sensor 13 obtains the actual system pressure through the micro pressure tap 15, and the leakage detector 14 detects in real time whether there is media leakage inside the connector body 1. The signals of the three are transmitted to the external control unit through the lead wire to realize comprehensive perception and early warning of the operating status of the connector body 1. During the sampling operation, the external sampling device is connected to the sampling interface 4, and the medium is discharged through the connection port 3 and the internal flow channel of the connector body 1. Throughout the process, the sintered metal filter 16 ensures that the micro pressure tap 15 is unobstructed.

[0032] Working Principle: In use, the leak detector 14, K-type thermocouple 12, and pressure sensor 13 are typically led out through shielded waterproof cables and connected to an external intrinsically safe power supply and control unit to ensure that power supply and signal transmission conditions are available before installation. Subsequently, the connector body 1 is screwed into the sampling port of the high-temperature pressure equipment through the installation interface 2, causing the graphite sealing ring 9 to press against the inner wall or end face of the equipment, forming an initial seal. When the device heats up, the expansion block 8 expands due to heat, pushing the graphite sealing ring 9 further outward. Through the mutual cooperation of the slot 17 and the block 18, the seal is further improved. The sealing performance is improved by increasing the sealing contact pressure, thereby achieving adaptive enhancement of sealing performance and effectively compensating for sealing deterioration caused by thermal relaxation or deformation. At the same time, the power supply and controller of the leak detector 14, K-type thermocouple 12 and pressure sensor 13 are activated. The K-type thermocouple 12 continuously monitors the temperature change of the connector body 1, the pressure sensor 13 obtains the real system pressure through the micro pressure tap 15, and the leak detector 14 detects in real time whether there is media leakage inside the connector body 1. The signals of the three are transmitted to the external control unit through the lead wire to realize comprehensive perception and early warning of the operating status of the connector body 1.

[0033] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A resiliently sealed inspection and sampling connector suitable for high-temperature pressure equipment, comprising a connector body (1), characterized in that: One end of the connector body (1) is fixedly connected to an installation interface (2), and the other end of the connector body (1) is fixedly connected to a connection port (3). The inner sidewalls of the connector body (1) and the connection port (3) are provided with a sensing cavity. The inner sidewall of the sensing cavity is fixedly connected to a protective sleeve (5). The inner sidewall of the protective sleeve (5) is fixedly connected to a heat insulation sleeve (11). The bottom of the inner cavity of the heat insulation sleeve (11) is fixedly connected to a leak detector (14). The inner sidewall of the connector body (1) is provided with a sealing groove (6). The inner cavity of the sealing groove (6) is fixedly connected to a lip seal ring (7). The outer surface of the lip seal ring (7) is fixedly connected to an expansion block (8). The outer surface of the expansion block (8) is fitted with a graphite seal ring (9).

2. The elastically sealed inspection and sampling joint suitable for high-temperature pressure equipment according to claim 1, characterized in that: The lip seal (7) has multiple slots (18) inside, and the graphite seal (9) has multiple blocks (17) fixedly connected to its outer surface. The blocks (17) engage with the slots (18).

3. The elastically sealed inspection and sampling joint suitable for high-temperature pressure equipment according to claim 1, characterized in that: The connector body (1) and the connection port (3) are provided with micro pressure holes (15), one end of which extends into the inner cavity of the protective sleeve (5).

4. The elastically sealed inspection and sampling joint suitable for high-temperature pressure equipment according to claim 1, characterized in that: The inner cavity of the protective sleeve (5) is fixedly connected to a K-type thermocouple (12) and a pressure sensor (13).

5. The elastically sealed inspection and sampling joint suitable for high-temperature pressure equipment according to claim 3, characterized in that: A sintered metal filter (16) is fixedly connected inside the micro-pressure hole (15), and the expansion block (8) is made of a heat-expanding material.

6. The elastically sealed inspection and sampling joint suitable for high-temperature pressure equipment according to claim 1, characterized in that: One end of the connection port (3) is fixedly connected to a sampling interface (4), and the heat insulation sleeve (11) is made of ceramic fiber material.

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