A water-cooled wall tube leak detection device

Abstract

The utility model belongs to the technical field of the fluid seal test of tubular structure parts, specifically relates to a water cooling wall pipe leak detection device, and the device water cooling wall pipe leak detection device includes the plugging piece for plugging the one end of single water cooling wall pipe and installs in the water cooling wall pipe other end for detecting pressure pressure measuring piece, and plugging piece and pressure measuring piece all are equipped with push -out support mechanism, and push -out support mechanism includes push -out support rod and abutting member, and one end of push -out support rod is connected with plugging piece or pressure measuring piece thread or abuts, and the other end is connected with abutting member thread, when push -out support rod is connected with plugging piece or pressure measuring piece thread, and the thread rotation direction of abutting member and plugging piece or pressure measuring piece is opposite. The axial thrust of push -out support mechanism ensures that plugging piece and pressure measuring piece keep sealed state with water cooling wall pipe, guarantees the accuracy of detection result, and simultaneously, push -out support mechanism can provide stable support force, guarantees that plugging piece and pressure measuring piece do not occur displacement or slack in the detection process.

Description

Technical Field

[0001] This utility model belongs to the technical field of fluid sealing test of tubular structural components, and specifically relates to a leak detection device for water-cooled wall tubes. Background Technology

[0002] Currently, boilers are widely used in thermal power generation, district heating, and industrial heat supply. As one of the core heat transfer components of a boiler, the water-cooled wall system typically consists of several rows of high-heat-resistant wall tubes distributed around the boiler furnace. Inside, a flowing heat exchange medium flows, while outside, it absorbs the heat from the boiler furnace flames or flue gas, and also absorbs the radiant heat from the high-temperature combustion products in the furnace. The water-cooled wall system plays a crucial role in cooling the furnace, protecting the furnace walls, and maintaining the normal operation of the boiler. Its sealing performance directly affects the safety, economy, and environmental impact of boiler operation. During long-term operation, water-cooled wall tubes are susceptible to thermal stress, corrosion, and mechanical vibration, which may lead to weld leaks or tube damage, resulting in unplanned shutdowns, safety accidents, or energy waste, posing significant safety and economic risks.

[0003] Traditional leak detection for water-cooled wall tubes typically involves overall water injection and pressurization, with multiple injection and drainage operations to inspect each water-cooled wall tube individually. Because boilers have numerous water-cooled wall tubes, when a leak or rupture occurs in one tube, the pressure test will show leakage, especially in areas with densely packed tubes. The leak can spread to other nearby tubes, wetting them and making it difficult to accurately identify the leaking tube and pinpoint its exact location. Furthermore, the overall water injection and pressurization method involves a large volume of water, resulting in significant wastewater discharge during pressure testing, polluting the environment and wasting water resources.

[0004] As an improvement, Chinese utility model patent CN222733783U, authorized on April 8, 2025, discloses a device for locating leaks in boiler tubes. The device includes: a detection component inserted into one end of the boiler tube; a first sealing ring and a first pressure member fitted onto the first connecting portion of the detection component (i.e., pressure measuring component); the first sealing ring contacting the end of the first cylindrical head of the detection component; the outer diameter of the first sealing ring contacting the inner wall of the boiler tube; a first fastener fitted onto the first threaded portion and abutting against the first pressure member; and a through hole at the axial center of the detection component; and a sealing component inserted into the other end of the boiler tube, including a sealing member (i.e., a plugging member), a second sealing ring, a second pressure member, and a second fastener. In use, the detection component and the sealing component are inserted into both ends of the boiler tube, and a water or airflow pipe is inserted into the through hole of the detection component. By using a pressure gauge, the leaking pipe can be quickly located, accurately determining the position of a single leaking boiler tube.

[0005] However, the cylindrical heads of the detection and sealing components have fixed dimensions, and during use, sealing is achieved only through the outer diameter of the sealing ring contacting the inner wall of the boiler tube (i.e., radial sealing). Different boiler tubes may have different diameter specifications. When this device is used with boiler tubes of incompatible diameters, the following problems may occur: If the tube diameter is larger than the outer diameter of the sealing ring, the sealing ring cannot effectively fit or completely conform to the inner wall of the boiler tube, resulting in seal failure and easy leakage of water or air. This makes it impossible to establish the pressure environment required for detection, affecting the accuracy of pressure detection and making it difficult to accurately locate the leak. If the tube diameter is smaller than the outer diameter of the sealing ring, the sealing ring may deform due to compression during insertion, or even fail to be inserted into the boiler tube, affecting detection efficiency. In addition, when the detection and sealing components are inserted into the boiler tube for detection, they need to withstand the corresponding detection pressure or abnormal water or air pressure. The detection and sealing components may not be able to effectively resist the pressure by relying solely on the sealing fit between the sealing ring and the boiler tube wall. There is a risk that the detection and sealing components may come out, posing a safety threat to the device and operators. Utility Model Content

[0006] The purpose of this invention is to provide a water-cooled wall tube leak detection device to solve the safety threat problem caused by the lack of a safety protection structure in existing detection devices.

[0007] To achieve the above objectives, the water-cooled wall tube leak detection device of this utility model adopts the following technical solution: A water-cooled wall tube leak detection device includes a plugging component for sealing one end of a single water-cooled wall tube and a pressure measuring component installed at the other end of the water-cooled wall tube for detecting pressure. Both the plugging component and the pressure measuring component are equipped with a pushing support mechanism. The pushing support mechanism includes a pushing support rod and an abutting component. One end of the pushing support rod is threadedly connected to or abuts against the plugging component or the pressure measuring component, and the other end is threadedly connected to the abutting component. When the pushing support rod is threadedly connected to the plugging component or the pressure measuring component, the threads of the abutting component and the plugging component are opposite in direction.

[0008] Furthermore, one end of the plugging component is a connecting end that is threadedly connected to the push support rod, and the other end is a sealing end for sealing the water-cooled wall tube opening. The sealing end face of the plugging component is provided with a sealing structure.

[0009] Furthermore, the pressure measuring component body is provided with a pressure injection channel communicating with the water-cooled wall tube. One end of the pressure measuring component is a connecting end that is threadedly connected to the push support rod, and the other end is a sealing end for sealing with the water-cooled wall tube opening. The sealing end face of the pressure measuring component is provided with a sealing structure.

[0010] Furthermore, the cross-sectional profile of the plugging component or pressure measuring component is circular, and the maximum outer diameter of the plugging end of the plugging component and the sealing end of the pressure measuring component is greater than the inner diameter of the water-cooled wall tube opening.

[0011] Furthermore, the sealing structure is any one of an arc surface structure, a spherical structure, or a conical structure disposed on the sealing end face of the plugging end of the plugging member or the sealing end face of the pressure measuring member.

[0012] Furthermore, the end faces of both the blocking end of the plugging component and the sealing end of the pressure measuring component are flat, and the sealing structure is an elastic sealing component disposed in an annular groove on the end face.

[0013] Furthermore, the pressure injection channel includes a pressure injection groove extending axially along the pressure measuring element, and a pressure measuring hole extending radially along the pressure measuring element and communicating with the pressure injection groove, wherein an external pressure measuring pipeline is connected to the pressure measuring hole.

[0014] Furthermore, a pressure gauge is connected to the injection channel.

[0015] Furthermore, a force-applying structure is provided on the middle section of the jacking support rod.

[0016] Furthermore, the force-applying structure is an operating handle inserted into the central hole of the push support rod.

[0017] The beneficial effects of this water-cooled wall tube leak detection device are as follows: This device is an improvement upon existing technology. The axial thrust of the jacking support mechanism ensures a sealed state between the plug and pressure testing components and the water-cooled wall tube, preventing pressure leakage due to poor sealing during testing and ensuring accurate results. Simultaneously, the jacking support mechanism provides stable support, preventing displacement or loosening of the plug and pressure testing components during testing, thus guaranteeing reliability and reducing the safety threat to operators from abnormal pressure causing the plug or pressure testing components to detach. The plug effectively seals one end of the water-cooled wall tube and, in conjunction with the pressure testing component, forms a relatively independent testing space within the single water-cooled wall tube. During leak detection, the pressure inside the water-cooled wall tube is detected through one end of the pressure testing component. Based on the obtained pressure information, it is determined whether a leak exists in the water-cooled wall tube, achieving precise location of the leaking water-cooled wall tube. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the detection component structure of the water-cooled wall tube leak detection device in this utility model; Figure 2 This is a schematic diagram of the sealing component structure of the water-cooled wall tube leak detection device in this utility model; Figure 3 This is a schematic diagram illustrating the use of the water-cooled wall tube leak detection device in this utility model.

[0019] In the diagram: 100, sealing assembly; 200, detection assembly; 300, water-cooled wall; 301, upper drum; 302, water-cooled wall tube; 303, lower drum; 1. Push support rod; 2. Pressure measuring component; 3. Abutment component; 4. Pressure injection groove; 5. O-ring seal; 6. Pressure gauge mounting hole; 7. Pressure gauge; 8. Pressure measuring hole; 9. Pressure measuring connector; 10. First quick connector; 11. Hoses; 12. Second quick connector; 13. Control valve; 14. Center hole; 15. Operating handle; 16. Plug. Detailed Implementation

[0020] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0021] The water-cooled wall tube leak detection device provided by this utility model achieves leak detection of a single water-cooled wall tube through the combined use of a sealing component and a detection component; by setting up a push support mechanism, the sealing component and the detection component are supported and fixed during detection to maintain a sealed state with the water-cooled wall tube, thereby improving the safety protection effect and reducing the safety threat to operators; the end face sealing structure of the detection component makes it applicable to water-cooled wall tubes of different diameters.

[0022] An embodiment of the water-cooled wall tube leak detection device of this utility model: refer to Figure 3 As shown, the water-cooled wall 300 includes an upper boiler drum 301 and a lower boiler drum 303 arranged in parallel. A water-cooled wall tube array, consisting of several individual water-cooled wall tubes 302, is installed between the upper boiler drum 301 and the lower boiler drum 303 by welding or expansion. The upper and lower ends of the water-cooled wall tubes 302 are respectively connected to the upper boiler drum 301 and the lower boiler drum 303. This embodiment is merely illustrative and does not specifically limit the specific structure or shape of the water-cooled wall 300.

[0023] like Figure 1 and Figure 2 As shown, and refer to Figure 3 As shown, the water-cooled wall tube leak detection device provided by this utility model includes a sealing component 100 and a detection component 200. The sealing component 100 is used to seal one end of a single water-cooled wall tube 302 during leak detection operations, and the detection component 200 is installed at the other end of the tube for detecting pressure. The sealing component 100 and the detection component 200 cooperate to establish an independent detection space within the single water-cooled wall tube 302, thereby realizing the leak detection operation of the single water-cooled wall tube 302.

[0024] In this embodiment, the sealing component 100 includes a blocking element 16 for blocking one end of a single water-cooled wall tube 302; the detection component 200 includes a pressure measuring element 2, which is installed at the other end of the water-cooled wall tube 302 for detecting pressure; both the blocking element 16 and the pressure measuring element 2 are equipped with a pushing support mechanism; the pushing support mechanism includes a pushing support rod 1 and an abutment 3, one end of the pushing support rod 1 is threadedly connected to the blocking element 16 or the pressure measuring element 2, and the other end of the pushing support rod 1 is threadedly connected to the abutment 3, the thread direction of the abutment 3 being opposite to that of the blocking element 16 or the pressure measuring element 2.

[0025] The axial thrust of the jacking support mechanism ensures a sealed state between the plugging component 16 and the pressure measuring component 2 and the water-cooled wall tube 302, preventing pressure leakage due to poor sealing during testing and affecting the accuracy of the test results. Simultaneously, the jacking support mechanism provides stable support force, ensuring that the plugging component 16 and the pressure measuring component 2 do not shift or loosen during testing, guaranteeing the reliability of the test and reducing the safety threat to operators caused by abnormal pressure causing the plugging component 16 or the pressure measuring component 2 to detach. During use, because the threads at both ends of the jacking support rod 1 rotate in opposite directions, rotating the jacking support rod 1 generates axial thrust at both ends simultaneously, pushing the plugging component 16 or the pressure measuring component 2 against the water-cooled wall tube 302. The connectors 3 move in opposite directions to achieve the pushing and supporting function, tightly pushing the plugging component 16 or the pressure testing component 2 onto or detaching it from the water-cooled wall tube 302. The plugging component 16 can effectively seal one end of the water-cooled wall tube 302 and cooperate with the pressure testing component 2 to form a relatively independent detection space within a single water-cooled wall tube 302. During leak detection, the pressure inside the water-cooled wall tube 302 is detected through one end of the pressure testing component 2, and the pressure information obtained is used to determine whether there is a leak in the water-cooled wall tube 302. The separate design of the plugging component 16 and the pressure testing component 2 makes it easy to replace the corresponding specifications of the components for water-cooled wall tubes 302 with different diameters, thus improving the versatility of the device.

[0026] like Figure 1 As shown, one end of the plugging component 16 is a connecting end threadedly connected to the push support rod 1, and the other end is a sealing end used to seal the opening of the water-cooled wall tube 302. The connecting end of the plugging component 16 is provided with a left-hand internal thread. In this embodiment, the plugging component 16 is a stepped solid cylindrical structure, with the larger diameter end serving as the sealing end. In other embodiments, the plugging component 16 is a through-diameter solid cylindrical structure; or, the connecting end of the plugging component 16 is a cylindrical structure, and its sealing end is a solid structure.

[0027] like Figure 2As shown, one end of the pressure measuring element 2 is a connecting end that is threadedly connected to the push support rod 1, and the other end is a sealing end for sealing with the pipe opening of the water-cooled wall tube 302. The pressure measuring element 2 body is provided with a pressure injection channel communicating with the water-cooled wall tube 302; the connecting end of the pressure measuring element 2 is provided with a right-hand internal thread. In this embodiment, the pressure measuring element 2 has a stepped cylindrical structure, with the larger diameter end serving as the sealing end, and the pressure injection channel is located in the larger diameter section of the pressure measuring element 2. In other embodiments, the pressure measuring element 2 has a cylindrical structure with a through-hole, and a barrier structure is provided between its connecting end and the sealing end to maintain the pressure measuring element 2 in a sealed state during pressure measurement.

[0028] refer to Figure 1 and Figure 2 As shown, the abutment 3 is a cylindrical structure. One end of the abutment 3 is provided with a right-hand internal thread, and the other end has a structure that is adapted to the inner arc surface of the upper pot drum 301 or the lower pot drum 303 to abut against the inner wall of the pot drum to support and fix the blocking part 16 or the pressure measuring part 2. The abutment 3 increases the stability and strength of the jacking support mechanism.

[0029] The main body of the push support rod 1 is a cylindrical rod structure, with left-hand external threads and right-hand external threads machined at both ends, which are used to connect with the plug 16 or the pressure measuring component 2, as well as the matching internal threads of the abutment component 3.

[0030] It should be understood that in the above embodiments, the thread direction of the push support rod 1, the pressure measuring component 2, the blocking component 16 and the abutment component 3 are all exemplary. They can be set to a structure with the opposite thread direction to that in this embodiment as needed, so that the threads of the push support rod 1, the pressure measuring component 2, the blocking component 16 and the abutment component 3 are compatible.

[0031] During use, the left-hand thread of the push support rod 1 engages with the left-hand internal thread of the pressure measuring component 2 or the plug 16, pushing the plug 16 or the pressure measuring component 2 to move axially along the push support rod 1. Simultaneously, the right-hand thread of the push support rod 1 engages with the right-hand internal thread of the abutment component 3, causing the abutment component 3 to move axially along the push support rod 1 towards or away from the pressure measuring component 2 or the plug 16, achieving synchronous adjustment of the pressure measuring component 2 or the plug 16 and the abutment component 3, and ensuring that the abutment component 3 and the pressure measuring component 2 or the plug 16 are balanced in force during the push process. The magnitude of the push force can be precisely adjusted by controlling the number of rotations of the push support rod 1, thereby controlling the contact pressure between the plug 16 or the pressure measuring component 2 and the water-cooled wall tube 302. The bidirectional thread structure of the push support mechanism facilitates the connection with the pressure measuring component 2 or the plug 16 and the abutment component 3 by rotating the push support rod 1 in a limited space, eliminating the need for complex disassembly and assembly steps and reducing operational difficulty. In addition, if the push support rod 1 and the abutment part 3 wear out after long-term use, they can be replaced separately; for different specifications of boiler drums, the push support rod 1 of different lengths can be replaced for adaptation.

[0032] In other embodiments, one end of the push support rod 1 abuts against the pressure measuring element 2 or the blocking element 16, and the other end is threadedly connected to the abutment element 3. In use, the push support rod 1 abuts against the end face of the pressure measuring element 2 or the blocking element 16. By rotating the push support rod 1, it is displaced in the axial direction, pushing the pressure measuring element 2 or the blocking element 16 to tightly abut against the water-cooled wall tube 302.

[0033] In this embodiment, the cross-sectional profile of the plugging component 16 or the pressure measuring component 2 is circular, and the maximum outer diameter of the plugging end of the plugging component 16 and the sealing end of the pressure measuring component 2 is larger than the inner diameter of the water-cooled wall tube 302. When the plugging end of the plugging component 16 and the sealing end of the pressure measuring component 2 are engaged with the water-cooled wall tube 302, under the pushing force of the jacking support mechanism, the larger outer diameter of the plugging end of the plugging component 16 and the sealing end of the pressure measuring component 2 can fit tightly against the inner wall of the boiler drum and cover and seal the water-cooled wall tube 302 through their end faces, forming a tight seal between the two, preventing pressure leakage in the water-cooled wall tube 302, and ensuring the accuracy of the pressure measurement results; at the same time, since the plugging end of the plugging component 16 and the sealing end of the pressure measuring component 2 do not need to be inserted into the water-cooled wall tube 302, the operation process is simpler and faster.

[0034] In this embodiment, both the sealing end face of the plugging component 16 and the sealing end face of the pressure measuring component 2 are provided with sealing structures. Specifically, the sealing end face of the plugging component 16 is configured as any one of an arc surface structure, a spherical structure, or a conical structure; a section of the sealing end of the pressure measuring component 2 is provided with a pressure injection channel, and its end face is an annular end face. Its sealing structure is preferably configured as a conical structure. Of course, depending on the actual situation, the sealing end face of the pressure measuring component 2 can be configured as a spherical structure or an arc surface structure. The arc surface structure and the spherical structure can automatically adjust the contact angle with the water-cooled wall tube 302 to a certain extent. Under the action of the jacking force, they can ensure that the sealing surface fits well with the end face of the water-cooled wall tube 302, improving the reliability of the seal; the conical structure has a certain guiding effect, which enables the pressure measuring component 2 or the plugging component 16 to be accurately inserted into the end face of the water-cooled wall tube 302, achieving rapid positioning, and forming a reliable seal under the action of the jacking force.

[0035] In the above embodiments, through the end-face sealing structure of the plugging component 16 and the pressure measuring component 2, when there are differences in the diameter of the water-cooled wall tube 302, the sealing structure can adaptively fit the opening of the water-cooled wall tube 302 through the pressure of the jacking support mechanism, improving the adaptability of the device; at the same time, under axial pressure, the jacking force can be uniformly transmitted, avoiding sealing failure caused by local stress concentration; when the sealing structure is used with the opening of the water-cooled wall tube 302, it is only necessary to align the plugging component 16 or the pressure measuring component 2 with the opening of the water-cooled wall tube 302, and use the annular end face of the opening to form a contact seal with the sealing structure of the plugging component 16 and the pressure measuring component 2, no longer relying on precise matching with the diameter of the water-cooled wall tube 302, so that the plugging component 16 and the pressure measuring component 2 can be used for water-cooled wall tubes 302 with different diameters, improving the versatility of the leak detection device, reducing the difficulty of operation, and improving the leak detection efficiency; at the same time, the axial jacking force of the jacking support mechanism makes the sealing structure contact the opening of the water-cooled wall tube 302 or the inner wall of the boiler drum more tightly.

[0036] As a further embodiment, the conical sealing structure also includes an annular groove on the conical surface, in which an O-ring fluororubber sealing ring is embedded for sealing the contact surface when mating with the nozzle of the water-cooled wall tube 302. In this case, the sealing ring and the conical surface mate to form a double sealing structure, improving the reliability of the seal. The rubber sealing ring has good elasticity and flexibility, capable of filling the minute gaps between the pressure measuring element 2 or the plugging element 16 and the mating end face of the water-cooled wall tube 302.

[0037] In other implementations, such as Figure 1 and Figure 2 As shown, the end faces of the plugging end of the plugging component 16 and the sealing end of the pressure measuring component 2 are both flat. An annular groove is provided on the end faces of both. The sealing structure is an O-ring fluororubber sealing ring embedded in the annular groove, which is used to seal the contact surface when the plugging end of the plugging component 16 and the sealing end of the pressure measuring component 2 are engaged with the water-cooled wall tube 302.

[0038] like Figure 2 As shown, in this embodiment, the pressure injection channel of the pressure testing component 2 includes a pressure injection groove 4 formed by the cylindrical inner cavity of the sealing end of the pressure testing component 2 and a pressure testing hole 8 extending radially outward along the pressure injection groove 4 and communicating with the pressure injection groove 4. The pressure testing hole 8 is connected to an external pressure testing pipeline. Specifically, the external pressure testing pipeline includes a pressure testing connector 9 connected to the pressure testing hole 8. The pressure testing connector 9 is connected to one end of a flexible hose 11 through a first quick connector 10, and the other end of the flexible hose 11 is connected to a control valve 13 through a second quick connector 12.

[0039] The inner circumference of the pressure injection groove 4 of the pressure testing component 2 is also provided with a pressure gauge mounting hole 6 along its radial direction. The pressure gauge mounting hole 6 and the pressure testing hole 8 are spaced 90° apart. The pressure gauge mounting hole 6 is a threaded hole. The pressure gauge 7 is externally connected to the thread of the pressure gauge mounting hole 6. The pressure gauge 7 can be a water pressure gauge or a gas pressure gauge, which is used to measure whether the gas pressure drop or water pressure drop in the water-cooled wall tube 302 meets the requirements during leak detection.

[0040] During leak detection, water pressure or air pressure leak detection is performed through the external pressure testing pipeline connected to the pressure injection tank 4. Pressurized gas is injected into the hose 11 through a portable hand-held air pump, or pressurized clean water is injected into the hose 11 through a portable hand-held water pump, and then enters the pressure injection tank 4 through the pressure testing connector 9 and pressure testing hole 8. It is then injected into the water-cooled wall tube 302, which is tightly fitted with the pressure testing component 2. The cooperation with the sealing component 100 forms a closed pressure testing environment in the water-cooled wall tube 302, and the leak detection operation can then be performed.

[0041] like Figure 1 and Figure 2 As shown in the figure, in this embodiment, a force-applying structure is provided on the middle section of the jacking support rod 1. This force-applying structure allows operators to easily apply force to the jacking support rod 1, thereby achieving its jacking support function.

[0042] Specifically, the force-applying structure is an operating handle 15 mounted on the jacking support rod 1. The middle section of the jacking support rod 1 has two central holes 14 spaced 90° apart along its axial direction. The operating handle 15 passes through the central holes 14. The main body of the operating handle 15 is a cylindrical rod-shaped structure that transitions into the central holes 14. Ball-shaped nut sleeves are connected to both ends of the main body of the operating handle 15 to prevent it from slipping out of the central holes 14. Of course, in other embodiments, there may be only one operating handle 15. The handle-type force-applying structure facilitates manual operation, allowing the jacking support rod 1 to be rotated without tools, especially in confined spaces where tools are inconvenient. The 90° staggered operating handles 15 result in a short displacement stroke when rotating the jacking support rod 1, reducing operating effort. Furthermore, the operator can choose the most convenient direction of force application based on the working space conditions, their position, and their operating posture, improving operational convenience and efficiency.

[0043] In other embodiments, the force-applying structure is a square or hexagonal structure located on the middle section of the jacking support rod 1; or, the force-applying structure is a hexagonal or square structure located on the small-diameter sections of the pressure measuring member 2 and the blocking member 16, and on the outer periphery of the abutment member 3. Using a square or hexagonal force-applying structure facilitates compatibility with common tools such as wrenches, allowing operators to apply rotational torque to the jacking support rod 1 using standard tools. It should be understood that the specific implementation of the force-applying structure can be selected according to the application scenario, etc., and this embodiment does not limit this.

[0044] refer to Figure 3 and combined Figure 1 and Figure 2 As shown, the usage process of the water-cooled wall tube leak detection device provided by this utility model is as follows: In this embodiment, the sealing component 100 is used to seal the opening of the water-cooled wall tube 302 located in the upper drum 301, and the detection component 200 is installed in the opening of the water-cooled wall tube 302 in the lower drum 303, as an example.

[0045] The first step is the installation and fixing of the sealing component 100.

[0046] The inner ends of the plugging part 16 and the inner ends of the abutment part 3 of the sealing assembly 100 of the water-cooled wall tube leak detection device are connected to the two ends of the push support rod 1 by left-hand thread and right-hand thread respectively, and the operating handle 15 is installed in the center hole 14 of the push support rod 1.

[0047] Place the sealing assembly 100 in the upper boiler drum 301, with the abutting part 3 of the sealing assembly 100 facing the inner wall of the upper boiler drum 301; the blocking part 16 facing the pipe opening of the water-cooled wall tube 302 inside the upper boiler drum 301, and the center line of the outer end face of the blocking part 16 coinciding with the center line of the water-cooled wall tube 302.

[0048] Rotate the operating handle 15 on the push support rod 1 counterclockwise so that the plugging part 16 and the abutting part 3 assembled at both ends of the push support rod 1 move simultaneously in a direction away from each other along the axial direction of the push support rod 1 until the outer end face of the plugging part 16 is tightly fitted with the inner wall of the upper drum 301 at the pipe opening of the water-cooled wall tube 302, and the outer end face of the abutting part 3 is tightly fitted with the inner wall of the upper drum 301. At this point, the sealing assembly 100 is installed and fixed.

[0049] Step 2: Testing the installation and securing of component 200.

[0050] The inner ends of the pressure measuring component 2 and the inner ends of the abutment component 3 of the detection component 200 of the water-cooled wall tube leak detection device are respectively connected to the two ends of the push support rod 1 by left-hand and right-hand threads, and the operating handle 15 is installed in the center hole 14 of the push support rod 1.

[0051] A pressure gauge 7 is connected to the pressure gauge mounting hole 6 of the pressure measuring component 2. A pressure measuring connector 9 is installed in the pressure measuring hole 8 of the pressure measuring component 2 to connect to an external pipeline to form a leak detection air pressure or water pressure passage.

[0052] Place the detection component 200 in the lower drum 303 of the boiler, with the contact part 3 of the detection component 200 facing the inner wall of the lower drum 303; the pressure measuring part 2 facing the pipe opening of the water-cooled wall tube 302 inside the lower drum 303, and the center line of the outer end face of the pressure injection groove 4 of the pressure measuring part 2 coincides with the center line of the water-cooled wall tube 302.

[0053] Rotate the operating handle 15 on the push support rod 1 counterclockwise so that the pressure measuring component 2 and the abutment component 3 assembled at both ends of the push support rod 1 move simultaneously in a direction away from each other along the axial direction of the push support rod 1 until the outer end face of the pressure measuring component 2 is tightly fitted with the inner wall of the lower drum 303 at the pipe opening of the water-cooled wall tube 302, and the outer end face of the abutment component 3 is tightly fitted with the inner wall of the lower drum 303. At this point, the installation and fixing of the detection component 200 is completed.

[0054] Step 3: Detect the connection between component 200 and the external pipeline.

[0055] The pressure testing connector 9 of the pressure testing component 2 is connected to one end of the hose 11 via the first quick connector 10, and the other end of the hose 11 is connected to the control valve 13 via the second quick connector 12.

[0056] Step 4: Pressurization and leak detection.

[0057] During the inflation or water filling operation, the control valve 13 is connected to a portable air pump or a portable water pump. The control valve 13 is opened to start the portable air pump or portable water pump, and pressurized gas or pressurized clean water is injected into the water-cooled wall tube 302, which is tightly fitted with the pressure measuring component 2, through the control valve 13, hose 11, pressure measuring connector 9, and pressure injection groove 4 in sequence. With the cooperation of the sealing component 100, a closed pressure testing environment is formed in the water-cooled wall tube 302.

[0058] After the air or water is filled to a certain pressure, turn off the portable air pump or portable water pump and control valve 13 in sequence. After stopping the air or water filling operation, check whether the pressure drop displayed by the pressure gauge 7 of the detection component 200 meets the standard requirements. If the pressure drop does not meet the standard requirements, it means that there is a leak in the water-cooled wall tube 302 being tested.

[0059] Step 5: After the leak detection is completed, disassemble the leak detection device.

[0060] (1) Pressure relief operation: After the single water-cooled wall tube 302 is leak-tested, first disconnect the control valve 13 from the portable air pump or portable water pump, then open the control valve 13 switch and perform pressure relief operation on the water-cooled wall tube 302 by releasing air or water.

[0061] (2) Disassembling the detection assembly 200: After the air pressure or water pressure returns to zero, disassemble the first quick connector 10 connected to the pressure testing connector 9, and separate the external connecting pipe from the pressure testing component 2 of the detection assembly 200; rotate the operating handle 15 of the detection assembly 200 clockwise, so that the pressure testing component 2 and the abutment component 3 assembled at both ends of the push support rod 1 move simultaneously in the direction of mutual approach along the axial direction of the push support rod 1, until the outer end faces of the pressure testing component 2 and the abutment component 3 are separated from the inner wall of the lower drum 303; remove the detection assembly 200 from the lower drum 303 or connect another water-cooled wall pipe 302 to be tested for the next round of leak detection.

[0062] (3) Disassemble the sealing assembly 100: Rotate the operating handle 15 of the sealing assembly 100 clockwise so that the plugging part 16 and the abutting part 3 assembled at both ends of the push support rod 1 move simultaneously in the direction of mutual approach along the axial direction of the push support rod 1 until the outer end face of the plugging part 16 and the abutting part 3 disengages from the inner wall of the upper boiler drum 301; remove the sealing assembly 100 from the upper boiler drum 301 or connect another water-cooled wall pipe 302 to be tested for the next round of leak detection.

[0063] (4) Inspection and storage of O-ring 5: Remove the O-ring 5 from the outer end face of the pressure measuring component 2 and the abutment component 3, check its elasticity and integrity, and store it properly or reinstall it for the next round of leak detection of water-cooled wall tube 302.

[0064] In order to quickly detect and locate leaking water-cooled wall tubes 302, multiple sets of water-cooled wall tube leak detection devices provided by this utility model can be used to conduct alternate detections during pressure holding and waiting to shorten the waiting process.

[0065] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some technical features, or organically combine different specific implementation methods to create the specific implementation methods shown in the accompanying drawings. Of course, those skilled in the art can also create other specific implementation methods not shown in the accompanying drawings. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A leak detection device for a water-cooled wall tube, comprising a plugging component for sealing one end of a single water-cooled wall tube and a pressure measuring component installed at the other end of the water-cooled wall tube for detecting pressure, characterized in that: Both the blocking component and the pressure measuring component are equipped with a jacking support mechanism. The jacking support mechanism includes a jacking support rod and an abutment component. One end of the jacking support rod is threadedly connected to or abuts against the blocking component or the pressure measuring component, and the other end is threadedly connected to the abutment component. When the jacking support rod is threadedly connected to the blocking component or the pressure measuring component, the thread direction of the abutment component is opposite to that of the blocking component or the pressure measuring component.

2. The water-cooled wall tube leak detection device according to claim 1, characterized in that: One end of the plugging component is a connecting end that is threadedly connected to the push support rod, and the other end is a sealing end used to seal the water-cooled wall tube opening. The sealing end face of the plugging component is provided with a sealing structure.

3. The water-cooled wall tube leak detection device according to claim 1, characterized in that: The pressure testing component has a pressure injection channel that communicates with the water-cooled wall tube. One end of the pressure testing component is a connecting end that is threadedly connected to the push support rod, and the other end is a sealing end for sealing with the water-cooled wall tube opening. The sealing end face of the pressure testing component has a sealing structure.

4. The water-cooled wall tube leak detection device according to claim 2 or 3, characterized in that: The cross-sectional profile of the plugging component or pressure measuring component is circular, and the maximum outer diameter of the plugging end of the plugging component and the sealing end of the pressure measuring component is greater than the inner diameter of the water-cooled wall tube opening.

5. The water-cooled wall tube leak detection device according to claim 4, characterized in that: The sealing structure is any one of an arc surface structure, a spherical structure, or a conical structure located on the sealing end face of the plugging end of the plugging component or the sealing end face of the pressure measuring component.

6. The water-cooled wall tube leak detection device according to claim 4, characterized in that: The end faces of the plugging end of the plugging component and the sealing end of the pressure measuring component are both flat, and the sealing structure is an elastic sealing component provided in an annular groove on the end face.

7. The water-cooled wall tube leak detection device according to claim 3, characterized in that: The pressure injection channel includes a pressure injection groove extending axially along the pressure measuring element, and a pressure measuring hole extending radially along the pressure measuring element and communicating with the pressure injection groove. An external pressure measuring pipeline is connected to the pressure measuring hole.

8. The water-cooled wall tube leak detection device according to claim 3 or 7, characterized in that: A pressure gauge is connected to the injection channel.

9. The water-cooled wall tube leak detection device according to any one of claims 1 to 3, characterized in that: A force-applying structure is provided on the middle section of the jacking support rod.

10. The water-cooled wall tube leak detection device according to claim 9, characterized in that: The force-applying structure is an operating handle that is inserted into the center hole of the push support rod.

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