A double-station industrial furnace tube airtightness detection device

Abstract

The utility model relates to a furnace tube detection technical field especially, relates to a kind of double-station industrial furnace furnace tube air tightness detection device, including detection table, the bottom of detection table is symmetrically provided with two groups of cylinder fixed plate, positioning cylinder is provided on cylinder fixed plate, the output end of positioning cylinder extends to the top of detection table and is connected with positioning rod, the end of positioning rod is fixedly connected with support cross bar, the end of support cross bar is fixedly connected with support recess. Unlike the detection device of existing single station mostly, the device can detect two furnace tubes simultaneously, and the air tightness of two furnace tubes can be detected in one detection, the positioning cylinder, fixed cylinder, sealing gasket and sealing pipe plug cooperate with each other to realize stable and reliable sealing of the surface of the furnace tube, ensure the sealing effect, effectively prevent external air from entering and internal gas from escaping, ensure that the detection environment is relatively independent, make the detection result truly reflect the air tightness of the furnace tube, and avoid misjudgment caused by poor sealing.

Description

Technical Field

[0001] This utility model relates to the field of furnace tube testing technology, and in particular to a dual-station industrial furnace tube airtightness testing device. Background Technology

[0002] Furnace tubes are mainly used to manufacture water-cooled wall tubes, boiling water tubes, superheated steam tubes, superheated steam tubes for locomotive boilers, large and small smoke tubes, and arch brick tubes, etc. Industrial furnace tubes are relatively long, generally reaching 5-9 meters, and are usually made by welding multiple furnace tube sections. Air tightness is an important characteristic of furnace tubes, and the welded furnace tubes need to undergo air tightness testing.

[0003] Currently available furnace tube testing devices are mostly single-station designs, capable of testing only one tube at a time, resulting in low testing efficiency. Testing typically involves simple pressure tests or applying soapy water, which have low sensitivity to detect minute leaks and make it difficult to accurately locate the leak. For furnace tubes with complex structures and large diameters, the testing results are less than ideal. On the other hand, some testing devices simply clamp the furnace tube when fixing and sealing it, failing to achieve a stable and reliable seal. This can easily allow outside air to enter the furnace tube or allow internal gas to escape, failing to accurately reflect the airtightness of the furnace tube itself. This inadequate sealing can lead to misjudgments and inaccurate test results. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a dual-station industrial furnace tube airtightness testing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A dual-station industrial furnace tube air tightness testing device includes a testing platform. Two sets of cylinder fixing plates are symmetrically arranged at the bottom of the testing platform. A positioning cylinder is arranged on the cylinder fixing plate. The output end of the positioning cylinder extends to the top of the testing platform and is connected to a positioning rod. A support crossbar is fixedly connected to the end of the positioning rod. The end of the support crossbar is fixedly connected to a support recess, and a snap-fit ​​plate is connected above the support recess by fastening bolts. A sealing gasket is provided inside the support recess, and the furnace tube to be tested is placed inside the sealing gasket. A support vertical plate is fixedly connected to one side of the outer wall of the testing platform, and a support concave plate is fixedly connected to the support vertical plate. Two sealing plugs are symmetrically arranged at the ends of the support concave plate. A support base plate is fixedly connected to one side of the testing platform, and a gas injection structure is provided on the support base plate.

[0006] Preferably, two fixed cylinders are symmetrically arranged on the testing platform. A support plate is fixedly connected to the output end of the fixed cylinder. A fixed plate is fixedly connected to one side of the support plate. Several abutment plates are fixedly connected to the bottom of the fixed plate. An airtightness testing structure is provided between the abutment plates. A fixed recess is provided directly below the abutment plates.

[0007] Preferably, the gas injection structure includes an output gas pump located on a supporting base plate. The output end of the output gas pump is connected to an output pipe. The end of the output pipe is fixedly connected to a pneumatic connecting plate. Sealing plugs are fixedly connected to both sides of the pneumatic connecting plate. An output gas nozzle is fixedly connected to the end of the sealing plug. The end of the output gas nozzle extends into the interior of the furnace tube. The end of the output pipe extends into the interior of the pneumatic connecting plate and forms a gas flow channel with the sealing plug and the output gas nozzle.

[0008] Preferably, the airtightness detection structure includes solution tanks symmetrically arranged on the detection platform. The output end of the solution tank is connected to a connecting pipe. A flow plate is fixedly connected to the end of the connecting pipe away from the solution tank. Several spray nozzles are provided at the bottom of the flow plate. The connecting pipe communicates with the interior of the flow plate and forms a liquid flow channel with the spray nozzles. A water pump is provided at the end of the connecting pipe near the solution tank.

[0009] Preferably, the airtightness detection structure further includes two electric hydraulic cylinders located on the support base plate. The output end of the electric hydraulic cylinder is fixedly connected to a mounting plate. A thermal imager is fixedly connected to the side of the mounting plate near the furnace tube. A scanning head is fixedly connected to one side of the thermal imager. An movable hole for the thermal imager to pass through is provided on one side of the fixed recess.

[0010] Preferably, a limiting plate is provided below the supporting horizontal plate, a slot is provided on the top of the limiting plate, a limiting rod is provided on one side of the outer wall of the slot, and a positioning hole is provided on the outer wall of the supporting horizontal plate to cooperate with the limiting rod.

[0011] Preferably, an electrical control box is provided on the supporting base plate, and the electrical control box is provided with a display screen and a control switch.

[0012] The beneficial effects of this utility model are: Unlike existing single-station testing devices, this device can test two furnace tubes simultaneously, completing the airtightness test of two furnace tubes in one test. Through the cooperation of positioning cylinders, fixing cylinders, sealing gaskets, and sealing plugs, a stable and reliable seal is achieved on the surface of the furnace tubes, ensuring the sealing effect, effectively preventing the entry of outside air and the escape of internal gas, ensuring a relatively independent testing environment, and making the test results truly reflect the airtightness of the furnace tubes, avoiding misjudgments caused by poor sealing.

[0013] When conducting airtightness testing on furnace tubes, a combination of foam leak detection and thermal imaging is used. The foam solution can visually display the leak point, while the thermal imager can capture the temperature difference on the furnace tube surface to accurately locate the leak point, even the smallest leak point. This solves the problem of the difficulty in accurately locating leaks using traditional methods. Subsequently, the thermal imager works in conjunction with the electrical control box. The thermal imager transmits the captured thermal image electrical signal to the electrical control box, where the controller analyzes and processes the data before displaying it on the screen. This intelligent analysis provides operators with intuitive and accurate test results. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a dual-station industrial furnace tube airtightness testing device proposed in this utility model. Figure 2 This is a top view schematic diagram of a dual-station industrial furnace tube airtightness testing device proposed in this utility model. Figure 3 This utility model proposes a dual-station industrial furnace tube airtightness testing device. Figure 2 A magnified structural diagram of point A in the middle; Figure 4 This is a schematic diagram of the connection structure between the positioning cylinder and the support recess of a dual-station industrial furnace tube airtightness testing device proposed in this utility model. Figure 5 This is a schematic diagram of the connection structure between the output air pump and the output air nozzle of a dual-station industrial furnace tube airtightness testing device proposed in this utility model. Figure 6 This is a schematic diagram of the airtightness detection structure and the connection structure of the supporting horizontal plate of a dual-station industrial furnace tube airtightness detection device proposed in this utility model. Figure 7 This is a schematic diagram of the supporting vertical plate structure of a dual-station industrial furnace tube airtightness testing device proposed in this utility model.

[0015] In the picture: 1. Testing table; 101. Support base plate; 2. Cylinder fixing plate; 201. Positioning cylinder; 202. Positioning rod; 203. Support crossbar; 204. Support recess; 205. Snap-fit ​​plate; 206. Sealing gasket; 3. Support vertical plate; 301. Support recess; 302. Sealing plug; 4. Fixing cylinder; 401. Support horizontal plate; 402. Fixing plate; 403. Abutment plate; 404. Fixing recess; 5. Output air pump; 501. Output pipe; 502. Pneumatic connection plate; 503. Sealing plug; 504. Output air nozzle; 6. Solution tank; 601. Connecting pipe; 602. Flow plate; 603. Spray nozzle; 604. Water pump; 7. Electric hydraulic cylinder; 701. Mounting plate; 702. Thermal imager; 703. Scanning head; 704. Movable hole; 8. Limit plate; 801. Limit rod; 9. Electrical control box. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0018] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. Example

[0019] Reference Figures 1-7 A dual-station industrial furnace tube air tightness testing device includes a testing platform 1. Two sets of cylinder fixing plates 2 are symmetrically arranged at the bottom of the testing platform 1. A positioning cylinder 201 is arranged on the cylinder fixing plate 2. The output end of the positioning cylinder 201 extends to the top of the testing platform 1 and is connected to a positioning rod 202. A support crossbar 203 is fixedly connected to the end of the positioning rod 202. The end of the support crossbar 203 is fixedly connected to the support recess 204. The upper part of the support recess 204 is connected to the snap plate 205 by fastening bolts. The support recess 204 is provided with a sealing gasket 206, and the furnace tube to be tested is placed inside the sealing gasket 206. A support vertical plate 3 is fixedly connected to one side of the outer wall of the testing table 1. A support concave plate 301 is fixedly connected to the support vertical plate 3. Two sealing plugs 302 are symmetrically arranged at the ends of the support concave plate 301. A support base plate 101 is fixedly connected to one side of the testing table 1. A gas injection structure is provided on the support base plate 101.

[0020] Two fixed cylinders 4 are symmetrically arranged on the testing table 1. The output end of the fixed cylinder 4 is fixedly connected to a support plate 401. A fixed plate 402 is fixedly connected to one side of the support plate 401. Several abutment plates 403 are fixedly connected to the bottom of the fixed plate 402. An airtightness testing structure is arranged between the abutment plates 403. A fixed recess 404 is arranged directly below the abutment plate 403.

[0021] A limiting plate 8 is provided below the supporting horizontal plate 401. A slot is provided on the top of the limiting plate 8. A limiting rod 801 is provided on one side of the outer wall of the slot. A positioning hole that cooperates with the limiting rod 801 is provided on the outer wall of the supporting horizontal plate 401.

[0022] In this implementation scheme, before testing the airtightness of the furnace tubes, the two furnace tubes to be tested are first placed sequentially in the support recess 204 and the fixing recess 404. Then, the positioning cylinder 201 and the fixing cylinder 4 are activated. When the fixing cylinder 4 operates, it causes the support horizontal plate 401 and the abutment plate 403 to descend, so that the abutment plate 403 presses against the surface of the furnace tube, clamping the middle part of the furnace tube. After clamping, the support horizontal plate 401 is inserted into the limiting plate 8. Then, the limiting rod 801 is inserted into the positioning hole on one side of the support horizontal plate 401 to prevent the abutment plate 403 from loosening during subsequent testing. Then, when the fixing cylinder 4 operates, it causes the positioning rod 202 and the support horizontal plate 8 to move. When 203 moves upward, the support plate 203 moves, causing the sealing gasket 206 in the middle of the support recess 204 to fit tightly against the surface of the furnace tube. The elasticity of the sealing gasket 206 allows it to deform under pressure, adaptively conforming to the contour of the furnace tube surface. By using fastening bolts to fix the snap-fit ​​plate 205 to the support recess 204, the furnace tube is tightly clamped between the snap-fit ​​plate 205 and the support recess 204, effectively preventing gas leakage from the seal. This ensures that the detection environment is relatively independent, so that the pressure changes or gas leaks detected in subsequent detection processes can truly reflect whether there is a leak in the furnace tube itself, avoiding misjudgments caused by poor sealing. Furthermore, after sealing the surface of the furnace tube, the two sealing plugs 302 at the support concave plate 301 are then inserted into the interior of the furnace tube, effectively preventing gas from leaking from the end of the furnace tube, thereby forming a relatively closed space inside the furnace tube, while preventing outside air from entering the interior of the furnace tube and avoiding interference from external gas with the test results. Example

[0023] Reference Figures 3-6 Based on Embodiment 1, a technical solution for a dual-station industrial furnace tube airtightness testing device is provided. The gas injection structure includes an output air pump 5 located on a supporting base plate 101. The output end of the output air pump 5 is connected to an output pipe 501. The end of the output pipe 501 is fixedly connected to a pneumatic connecting plate 502. Sealing plugs 503 are fixedly connected to both sides of the pneumatic connecting plate 502. An output air nozzle 504 is fixedly connected to the end of the sealing plug 503. The end of the output air nozzle 504 extends into the interior of the furnace tube. The end of the output pipe 501 extends into the interior of the pneumatic connecting plate 502 and forms a gas flow channel with the sealing plug 503 and the output air nozzle 504.

[0024] The airtightness testing structure includes a solution tank 6 symmetrically arranged on the testing platform 1. The output end of the solution tank 6 is connected to a connecting pipe 601. The end of the connecting pipe 601 away from the solution tank 6 is fixedly connected to a flow plate 602. Several spray nozzles 603 are provided at the bottom of the flow plate 602. The connecting pipe 601 communicates with the interior of the flow plate 602 and forms a liquid flow channel with the spray nozzles 603. A water pump 604 is provided at the end of the connecting pipe 601 near the solution tank 6.

[0025] The airtightness detection structure also includes two electric hydraulic cylinders 7 located on the support base plate 101. The output end of the electric hydraulic cylinder 7 is fixedly connected to the mounting plate 701. A thermal imager 702 is fixedly connected to the side of the mounting plate 701 near the furnace tube. A scanning head 703 is fixedly connected to one side of the thermal imager 702. An active hole 704 is provided on one side of the fixed recess 404 so that the thermal imager 702 can pass through.

[0026] An electrical control box 9 is installed on the supporting base plate 101, and the electrical control box 9 is equipped with a display screen and control switches.

[0027] In this embodiment, after the furnace tube surface is clamped and fixed, forming a sealed environment, the output air pump 5 is started. The output air pump 5 causes gas to be output from the output pipe 501 and flow out through the gas flow channel inside the pneumatic connecting plate 502, then sprayed out from the output nozzle 504. This causes the furnace tube to reach a certain pressure, at which point the water pumps 604 on both sides of the furnace tube are started. The water pumps 604 cause the foam solution inside the solution tank 6 to flow out through the connecting pipe 601 into the flow plate 602, then flow out through the liquid flow channel and sprayed onto the surface of the furnace tube from the spray nozzle 603. If the furnace tube has poor airtightness and a leak point, gas will escape from the leak point and come into contact with the foam solution to generate bubbles. At this time, the electric hydraulic cylinder 7 on one side of the support base plate 101 is started. The electric hydraulic cylinder 7 pushes the mounting plate 701 at its end to move along the surface of the furnace tube. When the mounting plate 701... 1. The thermal imager 702 is activated while the furnace tube is being moved. When the thermal imager 702 is running, the scanning head 703 moves along the surface of the furnace tube. When gas is injected into the furnace tube, if there is a leak on the surface of the furnace tube, the leaking gas exchanges heat with the surrounding environment from the leak point on the surface of the furnace tube, and at the same time, a temperature change occurs on the surface of the furnace tube. This causes the gas flow at the leak point to make the temperature different from the surrounding area. Then, the scanning head 703 scans the surface of the furnace tube. The thermal imager 702 then captures the temperature difference on the surface of the furnace tube and forms a thermal image. The thermal imager 702 then transmits the electrical signal of the thermal image to the electrical control box 9. The controller in the electrical control box 9 analyzes the received thermal image and displays the processed image on the display screen. Thus, the specific leak point of the furnace tube can be determined based on the abnormal temperature area on the surface of the furnace tube, and even small leak points that are not easily detected can be detected, thereby improving the detection efficiency of the furnace tube.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 are not intended to indicate or imply that the device or component 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.

[0029] Furthermore, 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A dual-station industrial furnace tube airtightness testing device, comprising a testing platform (1), characterized in that, Two sets of cylinder fixing plates (2) are symmetrically arranged at the bottom of the testing platform (1). A positioning cylinder (201) is provided on the cylinder fixing plate (2). The output end of the positioning cylinder (201) extends to the top of the testing platform (1) and is connected to a positioning rod (202). A support crossbar (203) is fixedly connected to the end of the positioning rod (202). The end of the support crossbar (203) is fixedly connected to a support recess (204), and a snap plate (205) is connected above the support recess (204) by fastening bolts. A sealing gasket (206) is provided inside the support recess (204), and the furnace tube to be tested is placed inside the sealing gasket (206). A support vertical plate (3) is fixedly connected to one side of the outer wall of the testing platform (1). A support concave plate (301) is fixedly connected to the support vertical plate (3). Two sealing plugs (302) are symmetrically arranged at the end of the support concave plate (301). A support base plate (101) is fixedly connected to one side of the testing platform (1). A gas injection structure is provided on the support base plate (101).

2. The dual-station industrial furnace tube airtightness testing device according to claim 1, characterized in that, Two fixed cylinders (4) are symmetrically arranged on the testing platform (1). The output end of the fixed cylinder (4) is fixedly connected to a support plate (401). A fixed plate (402) is fixedly connected to one side of the support plate (401). Several abutment plates (403) are fixedly connected to the bottom of the fixed plate (402). An airtightness detection structure is arranged between the abutment plates (403). A fixed recess (404) is arranged directly below the abutment plate (403).

3. The dual-station industrial furnace tube airtightness testing device according to claim 1, characterized in that, The gas injection structure includes an output gas pump (5) located on a supporting base plate (101). The output end of the output gas pump (5) is connected to an output pipe (501). The end of the output pipe (501) is fixedly connected to a pneumatic connecting plate (502). Both sides of the pneumatic connecting plate (502) are fixedly connected to sealing plugs (503). The end of the sealing plug (503) is fixedly connected to an output gas nozzle (504). The end of the output gas nozzle (504) extends into the interior of the furnace tube. The end of the output pipe (501) extends into the interior of the pneumatic connecting plate (502) and forms a gas flow channel with the sealing plug (503) and the output gas nozzle (504).

4. The dual-station industrial furnace tube airtightness testing device according to claim 2, characterized in that, The airtightness testing structure includes a solution tank (6) symmetrically arranged on the testing platform (1). The output end of the solution tank (6) is connected to a connecting pipe (601). A flow plate (602) is fixedly connected to the end of the connecting pipe (601) away from the solution tank (6). Several spray nozzles (603) are provided at the bottom of the flow plate (602). The connecting pipe (601) communicates with the interior of the flow plate (602) and forms a liquid flow channel with the spray nozzles (603). A water pump (604) is provided at the end of the connecting pipe (601) near the solution tank (6).

5. The dual-station industrial furnace tube airtightness testing device according to claim 4, characterized in that, The airtightness detection structure also includes two electric hydraulic cylinders (7) located on the support base plate (101). The output end of the electric hydraulic cylinder (7) is fixedly connected to the mounting plate (701). A thermal imager (702) is fixedly connected to the side of the mounting plate (701) near the furnace tube. A scanning head (703) is fixedly connected to one side of the thermal imager (702). An active hole (704) is provided on one side of the fixed recess (404) for the thermal imager (702) to pass through.

6. The dual-station industrial furnace tube airtightness testing device according to claim 2, characterized in that, A limiting plate (8) is provided below the supporting horizontal plate (401). A slot is provided on the top of the limiting plate (8). A limiting rod (801) is provided on one side of the outer wall of the slot. A positioning hole is provided on the outer wall of the supporting horizontal plate (401) to cooperate with the limiting rod (801).

7. The dual-station industrial furnace tube airtightness testing device according to claim 1, characterized in that, An electrical control box (9) is provided on the supporting base plate (101), and a display screen and control switch are provided on the electrical control box (9).

Images