Industrial metal pipeline sealing performance detection device and detection method

Abstract

The invention relates to the technical field of pipeline sealing performance detection, in particular to an industrial metal pipeline sealing performance detection device and method.The industrial metal pipeline sealing performance detection device comprises supporting columns, sealing modules are installed on one sides of the supporting columns, and metal pipelines are installed at the opposite ends of the two sealing modules; upper unit detection pipes and lower unit detection pipes are arranged on the upper side and the lower side of the metal pipeline; the metal pipeline is filled with normal-temperature gas, the first gas pressure sensor detects the gas pressure in the metal pipeline, the space between the metal pipeline and the cylinder is filled with the normal-temperature gas, after a period of time, the first gas pressure sensor measures the gas pressure again, and the gas pressure on the two sides is compared; when the two-time air pressure does not exceed the threshold value, the sealing performance of the metal pipeline is good, when the two-time air pressure exceeds the threshold value, the sealing performance of the metal pipeline is poor, two groups of air pressure data detected at the same temperature are compared, the sealing quality of the metal pipeline can be effectively detected, and the influence of different air temperatures on the air pressure is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline sealing detection, and in particular to an industrial metal pipeline sealing detection device and a detection method. Background Art

[0002] During pipeline laying, the sealing performance of the pipeline is particularly important. The traditional metal pipeline sealing test is to apply soapy water to the leaking part. When a leak occurs, the soap bubble will burst. This detection method is relatively simple and has low cost. In addition, there are also ultrasonic flaw detection technologies, which have high configuration costs.

[0003] The existing patent application number is 202210932044.2. An industrial metal pipe sealing detection device includes a base plate, a bracket group is symmetrically arranged on the base plate, a cylinder is fixedly connected to the top of each bracket group, a cylinder push rod is arranged on the cylinder, a connecting plate is fixedly connected to the end of the cylinder push rod, a sealing plug is fixedly connected to the connecting plate, a high-pressure air intake pipe is penetrated and connected to one of the sealing plugs, a ring groove is provided on the sealing plug, and the ring groove is connected to the high-pressure air intake pipe, a support assembly is arranged on the base plate, a metal pipe is arranged on the support assembly, and two sealing plugs are respectively inserted and connected to the two sides of the metal pipe. The present invention can enhance the sealing between the metal pipe and the sealing plug, and can judge whether the sealing detection of the metal pipe is carried out in a sealed state, and determine the accuracy of the detection data;

[0004] However, the above patent still has the following problems: first, the metal pipe to be tested in the above device is exposed to the outside, and gas is filled into the inside, and the air pressure is detected by a pressure sensor. After a period of time, the air pressure is detected again, and the two data are compared. If the difference exceeds the threshold, it means leakage, and if the difference does not exceed the error value, it means that the sealing is good. The above device does not take into account the impact of temperature on air pressure. In some areas, the temperature in the morning and at noon differs by as much as dozens of degrees. According to the principle of thermal expansion and contraction of gas, direct comparison of the air pressure detection data inside the metal pipe at different temperatures is not representative. Therefore, there is a problem of inaccurate sealing detection. Therefore, in view of the above problems, an industrial metal pipe sealing detection device and detection method are proposed. Summary of the invention

[0005] The object of the present invention is to provide an industrial metal pipeline sealing detection device and detection method to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] As an optional solution of the industrial metal pipeline sealing detection device and detection method described in the present invention, wherein: an industrial metal pipeline sealing detection device and detection method comprises a bottom plate and a support,

[0008] Both sides of the upper part of the bottom plate are fixedly connected with vertically arranged pillars, one side of the pillars is installed with sealing modules, and the opposite ends of the two groups of sealing modules are installed with metal pipes, the upper and lower sides of the metal pipes are provided with upper unit detection tubes and lower unit detection tubes, the inner sides of the lower unit detection tubes and the upper unit detection tubes are installed with insulation layers, and the outer sides of the lower unit detection tubes and the upper unit detection tubes are installed with support mechanisms;

[0009] The tops of the pillars are fixedly connected with lifting mechanisms, the free ends of the lifting mechanisms are fixedly connected with the upper unit detection tube, and a transparent observation plate is embedded in the center of the upper unit detection tube;

[0010] A heating body is fixedly connected to the inner side of the lower unit detection tube, and a second temperature sensor fixedly connected to the lower unit detection tube is arranged on one side of the heating body;

[0011] A gas heating module is also fixedly connected to the upper rear side of the bottom plate, the top of the gas heating module is connected with a second connecting pipe and a first connecting pipe distributed left and right, the other side of the second connecting pipe is connected with a second pump body fixedly connected to the bottom plate, the other end of the second pump body is connected with a fourth connecting pipe, the fourth connecting pipe is arranged inside the sealing module and a second one-way valve is installed on the outside of the other end, the other end of the first connecting pipe is connected with the first pump body fixedly connected to the bottom plate, the other end of the first pump body is connected with a third connecting pipe, and the other end of the third connecting pipe is connected with the lower unit detection pipe;

[0012] A support block fixedly connected to the bottom plate is arranged below the lower unit detection tube, and a vertically arranged display screen is installed on the upper front side of the bottom plate.

[0013] As an optional scheme of the industrial metal pipe sealing detection device and detection method described in the present invention, wherein: strip protrusions are provided on both sides of the lower end surface of the upper unit detection tube, and strip grooves are opened on both sides of the upper end surface of the lower unit detection tube, and the upper unit detection tube is tightly matched with the strip groove of the lower unit detection tube through the strip protrusions.

[0014] During pipeline laying, the sealing performance of the pipeline is particularly important. The traditional metal pipeline sealing test is to apply soapy water to the leaking part. When a leak occurs, the soap bubble will burst. This detection method is relatively simple and has low cost. In addition, there are also detections using ultrasonic flaw detection technology, etc. This type of detection method has a high configuration cost. When the existing device is performing pipeline sealing detection, the metal pipeline to be detected is exposed to the outside, and gas is filled into the inside, and the air pressure is detected by a pressure sensor. After a period of time, the air pressure is detected again, and the two data are compared. If the difference exceeds the threshold, it means there is a leak, and if the difference does not exceed the error value, it means that the sealing is good. The above device does not take into account the impact of temperature on air pressure. In some areas, the temperature in the morning and at noon differs by as much as dozens of degrees. According to the principle of thermal expansion and contraction of gas, direct comparison of the air pressure detection data inside the metal pipeline at different temperatures is not representative. , often the time interval between two detection data is long, and the temperature difference is large, so there is a problem of inaccurate sealing detection. When the device is in use, the metal pipe is placed in a cylinder surrounded by the lower unit detection tube and the upper unit detection tube, and the metal pipe is fixed by the sealing module and the supporting mechanism, and then the metal pipe is filled with normal temperature gas, and the internal air pressure of the metal pipe is detected by the first air pressure sensor, and the space between the metal pipe and the cylinder is filled with normal temperature gas. After a period of time, the air pressure is measured again by the first air pressure sensor. After comparing the air pressures on both sides, when the two air pressures do not exceed the threshold, it means that the metal pipe is well sealed. When the two air pressures exceed the threshold, it means that the metal pipe is not well sealed. This setting compares two sets of air pressure data detected at the same temperature, which can effectively detect the sealing quality of the metal pipe and avoid the influence of different temperatures on the air pressure.

[0015] As an optional solution of the industrial metal pipe sealing detection device and detection method described in the present invention, wherein: the sealing module includes a first hydraulic rod, a movable shaft and a second sealing disk, the outer side of the first hydraulic rod is fixedly connected to the pillar, the free end of the first hydraulic rod is fixedly connected to the movable shaft, the other end of the movable shaft is fixedly connected to the second sealing disk, the outer side of the second sealing disk is installed with a ring-shaped sealing ring, the other end of the second sealing disk is fixedly connected to the center, the other end of the second sealing disk is fixedly connected to a sealing mechanism, the other end of the sealing mechanism is in contact with the metal pipe, the upper and lower sides of the metal pipe are in contact with the support mechanism, and the opposite end faces of the second sealing disks on both sides are installed with second air pressure sensors;

[0016] The sealing mechanism comprises a sliding shaft and a blocking disk, one side of the sliding shaft is fixedly connected to the second sealing disk, the other end of the sliding shaft is fixedly connected to the blocking disk, and the other end surface of the blocking disk is fixedly connected to the first sealing disk, wherein the other end of the first sealing disk on one side is installed with a first air pressure sensor for detecting the air pressure inside the metal pipe, and the interior of the first sealing disk on the other side is connected to a fourth connecting pipe;

[0017] A plurality of first pressure sensors arranged in a circular trajectory are fixedly connected to the inside of one side of the blocking disk, and circular rings are fixedly connected to the opposite end faces of the two groups of blocking disks, and evenly distributed sound sensors are installed on the inner sides of the circular rings.

[0018] As an optional solution of the industrial metal pipe sealing detection device and detection method described in the present invention, the outer side of the sliding shaft is fixedly connected with an inclined reinforcement rod, and the other end of the reinforcement rod is fixedly connected to the sealing disk.

[0019] As an optional solution of the industrial metal pipeline sealing detection device and detection method described in the present invention, the outer diameter of the sealing ring is 1.1 times the outer diameter of the second sealing disk.

[0020] When sealing the metal pipe, the sliding shaft drives the sealing disk to move, and the first sealing disk on one side of the sealing disk fits tightly with the end faces of both ends of the metal pipe to achieve sealing of the metal pipe. The first pressure sensor can detect the extrusion pressure on the metal pipe to ensure sealing. Its ring covers the outside of both ends of the metal pipe. When the port seal is poor and gas leakage occurs, the sound sensor detects the sound of gas leakage at both ends, which means that the seals at both ends are poor and the position needs to be readjusted for sealing. The second sealing disk, the lower unit detection tube and the upper unit detection tube can form a chamber, and the metal pipe is arranged inside the chamber. At the same time, the chamber is filled with normal temperature gas. At this time, it effectively ensures that the metal pipe is in the same temperature environment, ensuring that the metal pipe sealing detection data is accurate. When the metal pipe is not sealed well, the internal air pressure of the chamber surrounded by the second sealing disk, the lower unit detection tube and the upper unit detection tube increases. At this time, the data of the second air pressure sensor increases, and the metal pipe can be tested for sealing by two methods to ensure accurate detection data.

[0021] As an optional scheme of the industrial metal pipe sealing detection device and detection method described in the present invention, the support mechanism includes a second hydraulic rod, a support frame and a support arm, the outer sides of the second hydraulic rod on the upper and lower sides are fixedly connected to the upper unit detection tube and the lower unit detection tube respectively, the free ends of the second hydraulic rod are fixedly connected to the support frame, and the other ends of the support frame are fixedly connected to the support arm, and the support arms on the upper and lower sides are staggered.

[0022] When fixing the metal pipe, the upper and lower support frames and support arms are brought close to each other to clamp the metal pipe for fixation, and the upper and lower support arms are staggered, which is used to effectively fix metal pipes of different diameters and expand the scope of use.

[0023] As an optional scheme of an industrial metal pipe sealing detection device and detection method described in the present invention, wherein: the gas heating module includes a heating frame, a coarse filter and a partition frame, the bottom of the heating frame is fixedly connected to the bottom plate, the top of the heating frame is connected to a second connecting pipe and a first connecting pipe distributed on the left and right, the interior of the heating frame is installed with an L-shaped partition frame which divides the heating frame into a heating chamber and a filter chamber, and the interior of the partition frame is fixedly connected with a vertically arranged fine filter, and one side of the fine filter is provided with a coarse filter fixedly connected to the heating frame, the outside of the partition frame is connected with an air pipe, and the outside of the air pipe is installed with a first one-way valve, and the heating chamber of the heating frame is installed with a heating net and a first temperature sensor distributed up and down.

[0024] The heating net inside the heating frame can heat the gas input into the metal pipe, the lower unit detection tube and the upper unit detection tube to make the input temperature consistent, which can effectively ensure the detection data of the first air pressure sensor. The coarse filter and fine filter can filter the external gas to prevent impurities from entering. The air pipe and the first one-way valve ensure that the gas can only flow in one direction to prevent hot air backflow. The first temperature sensor can detect the internal temperature of the heating frame to ensure that the input temperature is appropriate.

[0025] As an optional scheme of the industrial metal pipe sealing detection device and detection method described in the present invention, the lifting mechanism includes a mounting frame and a third hydraulic rod, the bottom of the mounting frame is fixedly connected to the support, the top of the mounting frame is fixedly connected to the third hydraulic rod, the free end of the third hydraulic rod is fixedly connected to the support platform, and the other end of the support platform is fixedly connected to a connecting block, and the other end of the connecting block is fixedly connected to the upper unit detection tube.

[0026] As an optional solution of the industrial metal pipe sealing detection device and detection method described in the present invention, a vertically arranged guide column is fixedly connected to the upper side of the support platform, and the outer side of the guide column is slidably connected to the mounting frame.

[0027] The third hydraulic rod can drive the movement of the support platform and the connecting block, thereby driving the upper unit detection tube to automatically move up and down, making it convenient to install the metal tube, and the guide column ensures that the support platform moves up and down stably.

[0028] As an optional scheme of the industrial metal pipe sealing detection device and detection method described in the present invention, the heating body includes a protective frame, a fan and a heating rod, the bottom of the protective frame is fixedly connected to the lower unit detection tube, the inside of the protective frame is installed with a fan, a heating rod fixedly connected to the protective frame is arranged above the fan, and a breathable mesh fixedly connected to the protective frame is arranged above the heating rod.

[0029] After the temperature outside the metal pipe gradually decreases, the temperature can be detected by the second temperature sensor. When the temperature drops, the heating gas is started through the heating rod inside the protective frame, and the air flow is driven by the fan to heat the gas outside the metal pipe, ensuring that the metal pipe is at the same temperature for a long time, ensuring the accuracy of the detected data.

[0030] As an optional solution of the industrial metal pipeline sealing detection device and detection method described in the present invention, the steps of the detection method are as follows:

[0031] Step 1: Start the lifting mechanism to move the upper unit detection tube up a certain distance, then place the metal pipe inside the lower unit detection tube from the side, and then reset the lifting mechanism;

[0032] Step 2: Multiple supporting mechanisms are started synchronously, and contact with the metal pipe to achieve pre-fixation and adjust the position, so that the metal pipe is located in the center of the cylinder surrounded by the upper unit detection tube and the lower unit detection tube, and then the sealing modules on both sides are started to drive the sealing mechanism to move, and the sealing mechanisms are close to each other and in close contact with the two ends of the metal pipe to achieve sealing. In this process, multiple supporting mechanisms are slowly loosened to ensure that the metal pipe is adjusted to the left and right under the action of the detection module. After the sealing module is gradually fixed, the supporting mechanism is started again to achieve further contact and fixation;

[0033] Step 3: Start the gas heating module, then transport the room temperature air inside the gas heating module to the inside of the metal pipe through the second pump body, and detect the air pressure inside the metal pipe through the first air pressure sensor;

[0034] Step 4: Pump the room temperature gas inside the gas heating module into the metal pipe and the inner sides of the lower unit detection tube and the upper unit detection tube through the first pump body to provide a stable room temperature environment for the metal pipe;

[0035] Step 5: The temperature of the outer side of the metal pipe is detected by the second temperature sensor. During long-term use, the temperature of the outer side of the metal pipe is stabilized by the heating body;

[0036] Step 6: After a period of time, the first air pressure sensor detects the air pressure again, and then compares the two air pressures.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] When the present invention is in use, the metal pipe is placed inside a cylinder surrounded by the lower unit detection tube and the upper unit detection tube, the metal pipe is fixed by a sealing module and a supporting mechanism, and then the inside of the metal pipe is filled with normal temperature gas, the air pressure inside the metal pipe is detected by a first air pressure sensor, and the space between the metal pipe and the cylinder is filled with normal temperature gas, and after a period of time, the air pressure is measured again by the first air pressure sensor, and the air pressure on both sides is compared. When the two air pressures do not exceed the threshold value, it means that the metal pipe has good sealing performance, and when the two air pressures exceed the threshold value, it means that the metal pipe has poor sealing performance. This arrangement compares two sets of air pressure data detected at the same temperature, which can effectively detect the sealing quality of the metal pipe and avoid the influence of different temperatures on the air pressure;

[0039] When sealing the metal pipe, the sliding shaft drives the plugging disc to move, and the first sealing disc on one side of the plugging disc fits tightly with the two end faces of the metal pipe to achieve sealing of the metal pipe, and the first pressure sensor can detect the squeezing pressure on the metal pipe to ensure sealing;

[0040] The ring covers the outside of both ends of the metal pipe. When the port seal is poor and gas leakage occurs, the sound sensor detects the sound of gas leakage at both ends, which means that the seals at both ends are poor and need to be readjusted for sealing.

[0041] The second sealing plate, the lower unit detection tube and the upper unit detection tube can form a chamber, a metal pipe is arranged inside the chamber, and the chamber is filled with normal temperature gas, which effectively ensures that the metal pipes are in the same temperature environment, and ensures that the metal pipe sealing test data is accurate. When the metal pipe is not sealed well, the air pressure inside the chamber surrounded by the second sealing plate, the lower unit detection tube and the upper unit detection tube increases. At this time, the data of the second air pressure sensor increases, and the metal pipe can be tested for sealing by two methods to ensure the accuracy of the test data;

[0042] After the temperature outside the metal pipe gradually decreases, the second temperature sensor can detect the temperature. When the temperature drops, the heating rod inside the protection frame starts to heat the gas, and the fan drives the air flow to heat the gas outside the metal pipe, ensuring that the metal pipe is at the same temperature for a long time, ensuring the accuracy of the detected data.

[0043] When fixing the metal pipe, the upper and lower support frames and support arms are close to each other to clamp the metal pipe for fixing, and the upper and lower support arms are staggered, which is used to effectively fix metal pipes of different diameters, expanding the scope of use;

[0044] The heating net inside the heating frame can heat the gas input into the metal pipe, the lower unit detection tube and the upper unit detection tube to make the input temperature consistent, which can effectively ensure the detection data of the first air pressure sensor. The coarse filter and fine filter can filter the external gas to prevent impurities from entering. The air pipe and the first one-way valve ensure that the gas can only flow in one direction to prevent hot air backflow. The first temperature sensor can detect the internal temperature of the heating frame to ensure that the input temperature is appropriate. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the overall structure of an industrial metal pipeline sealing detection device and detection method;

[0046] Figure 2 It is a front view of an industrial metal pipeline sealing detection device and detection method;

[0047] Figure 3 It is a cross-sectional view of a sealing module of an industrial metal pipeline sealing detection device and detection method;

[0048] Figure 4 It is a cross-sectional view of a sealing mechanism of an industrial metal pipeline sealing detection device and detection method;

[0049] Figure 5 It is a side view of a lower unit detection tube and an upper unit detection tube of an industrial metal pipeline sealing detection device and detection method;

[0050] Figure 6 It is a structural schematic diagram of an industrial metal pipeline sealing detection device and a detection method support mechanism;

[0051] Figure 7 It is a partial cross-sectional view of a gas heating module of an industrial metal pipeline sealing detection device and detection method;

[0052] Figure 8 It is a structural schematic diagram of a lifting mechanism of an industrial metal pipeline sealing detection device and detection method;

[0053] Fig. 9 The present invention is a cross-sectional view of a heating body of an industrial metal pipeline sealing detection device and detection method.

[0054] In the figure: 1, bottom plate; 2, pillar; 3, sealing module; 301, first hydraulic rod; 302, moving shaft; 303, second sealing disk; 304, sealing mechanism; 3042, sliding shaft; 3043, blocking disk; 3044, reinforcing rod; 3045, first sealing disk; 3046, ring; 3047, sound sensor; 3048, first pressure sensor; 3049, first air pressure sensor; 305, sealing ring; 306, second air pressure sensor; 4, supporting block; 5, lower unit detection tube; 6, upper unit detection tube; 7, supporting mechanism; 701, second hydraulic rod; 702, supporting frame; 703, supporting arm; 8, gas heating module; 801, heating frame; 802, coarse filter; 803, separation Partition frame; 804, fine filter; 805, air pipe; 806, first one-way valve; 807, heating net; 808, first temperature sensor; 9, first connecting pipe; 10, first pump body; 11, second connecting pipe; 12, second pump body; 13, lifting mechanism; 1301, mounting frame; 1302, third hydraulic rod; 1303, support table; 1304, connecting block; 1305, guide column; 14, observation board; 15, display screen; 16, insulation layer; 17, third connecting pipe; 18, fourth connecting pipe; 19, second one-way valve; 20, metal pipe; 21, second temperature sensor; 22, heating body; 2201, protection frame; 2202, fan; 2203, heating rod; 2204, breathable mesh. DETAILED DESCRIPTION

[0055] Embodiment 1:

[0056] See also Figure 1 , Figure 2 and Figure 5 , the present invention provides a technical solution:

[0057] An industrial metal pipeline sealing detection device and detection method, comprising a base plate 1 and a support 2,

[0058] Both sides of the upper part of the bottom plate 1 are fixedly connected with vertically arranged pillars 2, one side of the pillars 2 is installed with sealing modules 3, and the opposite ends of the two groups of sealing modules 3 are installed with metal pipes 20, the upper and lower sides of the metal pipes 20 are provided with upper unit detection tubes 6 and lower unit detection tubes 5, the inner sides of the lower unit detection tubes 5 and upper unit detection tubes 6 are installed with insulation layers 16, and the outer sides of the lower unit detection tubes 5 and upper unit detection tubes 6 are installed with support mechanisms 7;

[0059] The top of the pillars 2 is fixedly connected with a lifting mechanism 13, the free end of the lifting mechanism 13 is fixedly connected with the upper unit detection tube 6, and a transparent observation plate 14 is embedded in the center of the upper unit detection tube 6;

[0060] A heating body 22 is fixedly connected to the inner side of the lower unit detection tube 5, and a second temperature sensor 21 fixedly connected to the lower unit detection tube 5 is disposed on one side of the heating body 22;

[0061] A gas heating module 8 is also fixedly connected to the upper rear side of the bottom plate 1, and the top of the gas heating module 8 is connected with a second connecting pipe 11 and a first connecting pipe 9 which are distributed on the left and right sides, and the other side of the second connecting pipe 11 is connected with a second pump body 12 which is fixedly connected to the bottom plate 1, and the other end of the second pump body 12 is connected with a fourth connecting pipe 18, and the fourth connecting pipe 18 is arranged inside the sealing module 3 and a second one-way valve 19 is installed on the outside of the other end, and the other end of the first connecting pipe 9 is connected with a first pump body 10 which is fixedly connected to the bottom plate 1, and the other end of the first pump body 10 is connected with a third connecting pipe 17, and the other end of the third connecting pipe 17 is connected with the lower unit detection pipe 5;

[0062] A support block 4 fixedly connected to the bottom plate 1 is disposed below the lower unit detection tube 5 , and a vertically disposed display screen 15 is installed on the upper front side of the bottom plate 1 .

[0063] The lower end surface of the upper unit detection tube 6 is provided with strip convex blocks on both sides, and the upper end surface of the lower unit detection tube 5 is provided with strip grooves on both sides. The upper unit detection tube 6 is tightly matched with the strip grooves of the lower unit detection tube 5 through the strip convex blocks.

[0064] The steps of the above detection method are as follows:

[0065] Step 1: Start the lifting mechanism 13 to drive the upper unit detection tube 6 to move up a certain distance, then place the metal pipe 20 inside the lower unit detection tube 5 from the side, and then reset the lifting mechanism 13;

[0066] Step 2: Multiple support mechanisms 7 are started synchronously, and contact with the metal pipe 20 to achieve pre-fixation and adjust the position, so that the metal pipe 20 is located in the center of the cylinder surrounded by the upper unit detection tube 6 and the lower unit detection tube 5, and then the sealing modules 3 on both sides are started to drive the sealing mechanism 304 to move, and the sealing mechanisms 304 are close to each other and in close contact with the two ends of the metal pipe 20 to achieve sealing. In this process, multiple support mechanisms 7 are slowly loosened to ensure that the metal pipe 20 is adjusted to the left and right positions under the action of the detection module 3. After the sealing module 3 is gradually fixed, the support mechanism 7 is started again to achieve further contact and fixation;

[0067] Step 3: Start the gas heating module 8, then transport the room temperature air inside the gas heating module 8 to the inside of the metal pipe 20 through the second pump body 12, and detect the internal air pressure of the metal pipe 20 through the first air pressure sensor 3049;

[0068] Step 4: Pump the room temperature gas inside the gas heating module 8 into the metal pipe 20 and the inner sides of the lower unit detection tube 5 and the upper unit detection tube 6 through the first pump body 10, so as to provide a stable room temperature environment for the metal pipe 20;

[0069] Step 5: The temperature of the outer side of the metal pipe 20 is detected by the second temperature sensor 21. During long-term use, the temperature of the outer side of the metal pipe 20 is stabilized by the heating body 22;

[0070] Step 6: After a period of time, the first air pressure sensor 3049 detects the air pressure again, and then compares the two air pressures.

[0071] During pipeline laying, the sealing performance of the pipeline is particularly important. The traditional metal pipeline sealing test is to apply soapy water to the leaking part. When a leak occurs, the soap bubble will burst. This detection method is relatively simple and has low cost. In addition, there are also detection methods such as ultrasonic flaw detection technology. The configuration cost of this type of detection method is relatively high. When the existing device is performing pipeline sealing detection, the metal pipeline to be detected is exposed to the outside, and gas is filled into the inside, and the air pressure is detected by a pressure sensor. After a period of time, the air pressure is detected again. The two data are compared. If the difference exceeds the threshold, it means that there is a leak. If the difference does not exceed the error value, it means that the sealing is good. The above device does not take into account the impact of temperature on air pressure. In some areas, the temperature in the morning and at noon differs by as much as dozens of degrees. According to the principle of thermal expansion and contraction of gas, direct comparison of the air pressure detection data inside the metal pipeline at different temperatures is not representative. Often, the interval between the two detection data is long, and the temperature difference is large, so there is a problem. In order to solve the problem of inaccurate sealing detection, when the device is used, the metal pipe 20 is placed inside a cylinder surrounded by the lower unit detection tube 5 and the upper unit detection tube 6, and the two ends of the metal pipe 20 are sealed by the sealing module 3 and the supporting mechanism 7, and then the metal pipe 20 is filled with normal temperature gas, and the internal air pressure of the metal pipe 20 is detected by the first air pressure sensor 3049, and the space between the metal pipe 20 and the cylinder is filled with normal temperature gas. At this time, the metal pipe 20 can be kept in the same temperature range for a long time. After a period of time, the air pressure is measured again by the first air pressure sensor 3049. After comparing the air pressures on both sides, when the two air pressures do not exceed the threshold, it means that the metal pipe 20 has good sealing performance. When the two air pressures exceed the threshold, it means that the metal pipe 20 has poor sealing performance. This arrangement compares two sets of air pressure data detected at the same temperature, which can effectively detect the sealing quality of the metal pipe 20 and avoid the influence of different temperatures on the air pressure.

[0072] In this embodiment, a transparent observation plate 14 is provided in the center of the upper unit detection tube 6, which is convenient for observing the internal situation, and the inner sides of the lower unit detection tube 5 and the upper unit detection tube 6 are both installed with an insulation layer 16. The setting of the insulation layer 16 can achieve the purpose of insulation and effectively reduce the temperature dissipation. After the normal temperature gas is injected into the outer side of the metal pipe 20, the gas will not be injected again during the waiting time to ensure that the air pressure outside the metal pipe 20 is in a balanced state. However, during the waiting time, the environment outside the detection tube will affect the temperature inside the upper unit detection tube 6 and the lower unit detection tube 5. When the temperature drops, the internal temperature can be adjusted to a certain extent by the heating body 22. The heating on the device ensures that its temperature is at the temperature state just injected, ensuring the accuracy of the test data, and the normal temperature gas is set above the highest temperature of the day in the area, the temperature inside the device is higher than the temperature outside the device, and a certain margin is reserved for the temperature drop. Affected by the external environment, the temperature is heated by the heating body 22 when the temperature drops. On the contrary, it is not advisable for the temperature of the normal temperature gas to be lower than the temperature outside the device, because the heating body 22 can only heat up but not cool down. To ensure the accuracy of the detection, the input gas temperature is in a constant range, the initial value of the normal temperature gas is constant, and the temperature inside the device can fluctuate in a small range, with a small impact on the test results within 3 degrees Celsius, which can ensure the accuracy of the test data;

[0073] When injecting gas into the metal pipe 20, the room temperature gas inside the heating module 8 is injected into the metal pipe 20 through the second pump body 12, and the room temperature gas inside the heating module 8 is injected into the chamber outside the metal pipe 20 through the first pump body 9 to ensure constant temperature. The second one-way valve 19 is set to prevent gas backflow;

[0074] The temperature and air pressure displayed by each sensor can be displayed on the display screen 15 for easy observation by personnel. When the upper unit detection tube 6 and the lower unit detection tube 5 are docked, the upper unit detection tube 6 is tightly matched with the strip groove of the lower unit detection tube 5 through the strip protrusion, which can effectively ensure its sealing and prevent gas leakage.

[0075] Example 2

[0076] This embodiment is an improvement on embodiment 1. Figure 3 and Figure 4Specifically, the sealing module 3 includes a first hydraulic rod 301, a movable shaft 302 and a second sealing disk 303. The outer side of the first hydraulic rod 301 is fixedly connected to the pillar 2. The free end of the first hydraulic rod 301 is fixedly connected to the movable shaft 302. The other end of the movable shaft 302 is fixedly connected to the second sealing disk 303. The outer side of the second sealing disk 303 is installed with an annular sealing ring 305. The other end of the second sealing disk 303 is fixedly connected to the center of the second sealing disk 303. The other end of the sealing mechanism 304 is in contact with the metal pipe 20. The upper and lower sides of the metal pipe 20 are in contact with the support mechanism 7. The opposite end surfaces of the second sealing disks 303 on both sides are installed with second air pressure sensors 306.

[0077] The sealing mechanism 304 includes a sliding shaft 3042 and a blocking disk 3043, one side of the sliding shaft 3042 is fixedly connected to the second sealing disk 303, the other end of the sliding shaft 3042 is fixedly connected to the blocking disk 3043, and the other end surface of the blocking disk 3043 is fixedly connected to the first sealing disk 3045, wherein the other end of the first sealing disk 3045 on one side is installed with a first air pressure sensor 3049 for detecting the air pressure inside the metal pipe 20, and the interior of the first sealing disk 3045 on the other side is connected to the fourth connecting pipe 18;

[0078] A plurality of first pressure sensors 3048 arranged in a circular trajectory are fixedly connected to the inside of one side of the above-mentioned blocking disk 3043, and a ring 3046 is fixedly connected to the opposite end surface of the two groups of blocking disks 3043, and evenly distributed sound sensors 3047 are installed on the inner side of the ring 3046.

[0079] The outer sides of the sliding shafts 3042 are fixedly connected with obliquely arranged reinforcement rods 3044 , and the other ends of the reinforcement rods 3044 are fixedly connected with the sealing disks 3043 .

[0080] The outer diameter of the sealing ring 305 is 1.1 times the outer diameter of the second sealing disk 303 .

[0081] When sealing the metal pipe 20, the first hydraulic rod 301 drives the moving shaft 302 to move, and the moving shaft 302 drives the second sealing disk 303 to move, thereby moving the sliding shaft 3042, and the sliding shaft 3042 drives the blocking disk 3043 to move. The first sealing disk 3045 on one side of the blocking disk 3043 fits tightly with the end faces of both ends of the metal pipe 20 to achieve sealing of the metal pipe 20, and the first pressure sensor 3048 can detect the squeezing pressure on the metal pipe 20 to ensure sealing. The ring 3046 covers the outer sides of both ends of the metal pipe 20. When the port sealing is poor and gas leakage occurs, the sound sensor 3047 detects the sound of gas leakage at both ends. At this time, it means that the seals at both ends are not good, and the position needs to be readjusted for sealing. The second sealing disk 303, the lower unit detection tube 5 and the upper unit detection tube 6 can enclose a chamber, and the metal pipe 20 is arranged inside the chamber. At the same time, the chamber is filled with normal temperature gas. At this time, the metal pipe 20 is effectively guaranteed to be in the same temperature environment, ensuring that the sealing test data of the metal pipe 20 is accurate. When the surface or both sides of the metal pipe 20 are not sealed well, the air pressure inside the chamber surrounded by the second sealing disk 303, the lower unit detection tube 5 and the upper unit detection tube 6 increases. At this time, the data of the second air pressure sensor 306 increases, and the metal pipe 20 can be tested for sealing by two methods to ensure the accuracy of the test data;

[0082] In this embodiment, the sound sensor 3047 is used as an auxiliary sealing detection, and the sealing is judged by the sound generated by the gas leakage. The outer diameter of the sealing ring 305 is larger than the second sealing disk 303. When the outer diameter of the second sealing disk 303 matches the inner diameter of the upper unit detection tube 6 and the lower unit detection tube 5, the sealing effect can be guaranteed under the action of the sealing ring 305 and the insulation layer 16. The second air pressure sensor 306 can detect the chamber air pressure outside the metal pipe 20. When the metal pipe 20 leaks, the external air pressure increases, and the second air pressure sensor 306 can detect it in time. The double detection sealing method has a better effect. The first sealing disk 3045 is made of a sealing rubber plate, which can effectively ensure the sealing quality of the metal pipe 20.

[0083] The ring 3046 is arranged in an annular shape, covering the outer sides of both ends of the metal pipe 20. At this time, the sound sensor 3047 inside the ring 3046 is close to the port of the metal pipe 20, which helps to effectively detect the leakage of the contact part between the metal pipe 20 and the first sealing disk 3045;

[0084] The provision of the reinforcing rod 3044 ensures that when the sliding shaft 3042 moves, the first sealing disk 3045 is stably applied, ensuring that the metal pipe 20 applies pressure to the first pressure sensor 3048 .

[0085] Example 3

[0086] This embodiment is an improvement on embodiment 2. Figure 6 Specifically, the support mechanism 7 includes a second hydraulic rod 701, a support frame 702 and a support arm 703. The outer sides of the second hydraulic rod 701 on the upper and lower sides are fixedly connected to the upper unit detection tube 6 and the lower unit detection tube 5 respectively. The free ends of the second hydraulic rod 701 are fixedly connected to the support frame 702, and the other ends of the support frame 702 are fixedly connected to the support arm 703. The support arms 703 on the upper and lower sides are staggered.

[0087] When fixing the metal pipe 20, the support frames 702 and support arms 703 on the upper and lower sides are close to each other to clamp the metal pipe 20 for fixation, and the support arms 703 on the upper and lower sides are staggered. At this time, it is used to effectively fix metal pipes 20 of different diameters. When fixing smaller metal pipes 20, the support arms 703 on the upper and lower sides can cross to expand the scope of use.

[0088] Example 4

[0089] This embodiment is an improvement on embodiment 3. Figure 7 Specifically, the gas heating module 8 includes a heating frame 801, a coarse filter 802 and a partition frame 803. The bottom of the heating frame 801 is fixedly connected to the bottom plate 1, and the top of the heating frame 801 is connected with a second connecting pipe 11 and a first connecting pipe 9 distributed left and right. The interior of the heating frame 801 is installed with an L-shaped partition frame 803 which divides the heating frame 801 into a heating chamber and a filter chamber, and the interior of the partition frame 803 is fixedly connected with a vertically arranged fine filter 804, and one side of the fine filter 804 is provided with a coarse filter 802 fixedly connected to the heating frame 801, the outer side of the partition frame 803 is connected with an air pipe 805, and the outer side of the air pipe 805 is installed with a first one-way valve 806, and the heating chamber of the heating frame 801 is installed with a heating net 807 and a first temperature sensor 808 distributed up and down.

[0090] The heating net 807 inside the heating frame 801 can heat the gas input into the metal pipe 20, the lower unit detection tube 5 and the upper unit detection tube 6 to make the input room temperature gas temperature consistent, which can effectively ensure the accuracy of the two detection data of the first air pressure sensor 3049. The coarse filter net 802 and the fine filter net 804 can filter the external gas to prevent impurities from entering. The air pipe 805 and the first one-way valve 806 ensure that the gas can only flow in one direction to avoid hot air backflow and waste of resources. The first temperature sensor 808 can detect the internal temperature of the heating frame 801 to ensure that the input temperature is appropriate.

[0091] Example 5

[0092] This embodiment is an improvement on embodiment 4. Figure 8 Specifically, the lifting mechanism 13 includes a mounting frame 1301 and a third hydraulic rod 1302. The bottom of the mounting frame 1301 is fixedly connected to the pillar 2. The top of the mounting frame 1301 is fixedly connected to the third hydraulic rod 1302. The free ends of the third hydraulic rods 1302 are fixedly connected to a support platform 1303, and the other ends of the support platforms 1303 are fixedly connected to a connecting block 1304. The other end of the connecting block 1304 is fixedly connected to the upper unit detection tube 6.

[0093] A vertically arranged guide column 1305 is also fixedly connected to one side of the upper side of the support platform 1303 , and the outer side of the guide column 1305 is slidably connected to the mounting frame 1301 .

[0094] The third hydraulic rod 1302 can drive the support platform 1303 and the connecting block 1304 to move, thereby driving the upper unit detection tube 6 to automatically move up and down, which is convenient for installing the metal tube 20, and the guide column 1305 ensures that the support platform 1303 moves up and down stably.

[0095] Example 6

[0096] This embodiment is an improvement on embodiment 5. Fig. 9 Specifically, the heating body 22 includes a protective frame 2201, a fan 2202 and a heating rod 2203. The bottom of the protective frame 2201 is fixedly connected to the lower unit detection tube 5. The fan 2202 is installed inside the protective frame 2201. The heating rod 2203 fixedly connected to the protective frame 2201 is arranged above the fan 2202. The breathable mesh 2204 fixedly connected to the protective frame 2201 is arranged above the heating rod 2203.

[0097] After the temperature outside the metal pipe 20 gradually decreases, the temperature can be detected by the second temperature sensor 21. When the temperature drops, the heating rod 2203 inside the protection frame 2201 starts to heat the gas, and the fan 2202 drives the air flow to heat the gas outside the metal pipe 20, ensuring that the metal pipe 20 is at the same temperature for a long time, ensuring the accuracy of the detected data;

[0098] In this embodiment, when air flows, the air is the gas in the outer chamber of the metal pipe 20, and no gas is added, so it will not affect the detection data. The breathable mesh 2204 can serve a protective purpose to prevent people from accidentally touching the heating rod 2203 and getting burned after use.

[0099] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. An industrial metal pipeline sealing detection device, characterized in that: It comprises a base plate (1) and a support (2), Vertically arranged pillars (2) are fixedly connected to both sides above the bottom plate (1); a sealing module (3) is installed on one side of the pillar (2); and metal pipes (20) are installed on opposite ends of two groups of sealing modules (3); upper unit detection tubes (6) and lower unit detection tubes (5) are installed on upper and lower sides of the metal pipes (20); thermal insulation layers (16) are installed on the inner sides of the lower unit detection tubes (5) and the upper unit detection tubes (6); and supporting mechanisms (7) are installed on the outer sides of the lower unit detection tubes (5) and the upper unit detection tubes (6); The top of each of the pillars (2) is fixedly connected to a lifting mechanism (13), the free end of the lifting mechanism (13) is fixedly connected to an upper unit detection tube (6), and a transparent observation plate (14) is embedded in the center of the upper unit detection tube (6); A heating body (22) is fixedly connected to the inner side of the lower unit detection tube (5), and a second temperature sensor (21) fixedly connected to the lower unit detection tube (5) is provided on one side of the heating body (22); A gas heating module (8) is also fixedly connected to the upper rear side of the bottom plate (1); the top of the gas heating module (8) is connected to a second connecting pipe (11) and a first connecting pipe (9) which are distributed on the left and right; the other side of the second connecting pipe (11) is connected to a second pump body (12) which is fixedly connected to the bottom plate (1); the other end of the second pump body (12) is connected to a fourth connecting pipe (18); the fourth connecting pipe (18) is arranged inside the sealing module (3) and a second one-way valve (19) is installed on the outside of the other end; the other end of the first connecting pipe (9) is connected to the first pump body (10) which is fixedly connected to the bottom plate (1); the other end of the first pump body (10) is connected to a third connecting pipe (17); the other end of the third connecting pipe (17) is connected to the lower unit detection pipe (5); A support block (4) fixedly connected to the bottom plate (1) is arranged below the lower unit detection tube (5), and a vertically arranged display screen (15) is installed on the upper front side of the bottom plate (1); The sealing module (3) comprises a first hydraulic rod (301), a movable shaft (302) and a second sealing disk (303); the outer side of the first hydraulic rod (301) is fixedly connected to the pillar (2); the free end of the first hydraulic rod (301) is fixedly connected to the movable shaft (302); the other end of the movable shaft (302) is fixedly connected to the second sealing disk (303); the outer side of the second sealing disk (303) is provided with an annular sealing ring (305); the center of the other end of the second sealing disk (303) is fixedly connected to a sealing mechanism (304); the other end of the sealing mechanism (304) contacts the metal pipe (20); the upper and lower sides of the metal pipe (20) are in contact with the supporting mechanism (7); and the opposite end surfaces of the second sealing disk (303) on both sides are provided with second air pressure sensors (306); The sealing mechanism (304) comprises a sliding shaft (3042) and a sealing disk (3043), one side of the sliding shaft (3042) is fixedly connected to the second sealing disk (303), the other end of the sliding shaft (3042) is fixedly connected to the sealing disk (3043), and the other end surface of the sealing disk (3043) is fixedly connected to the first sealing disk (3045), wherein the other end of the first sealing disk (3045) on one side is installed with a first air pressure sensor (3049) for detecting the internal air pressure of the metal pipe (20), and the interior of the first sealing disk (3045) on the other side is connected to a fourth connecting pipe (18); A plurality of first pressure sensors (3048) arranged in a circular trajectory are fixedly connected to the inside of one side of the blocking disk (3043), and a circular ring (3046) is fixedly connected to the opposite end faces of the two groups of blocking disks (3043), and evenly distributed sound sensors (3047) are installed on the inner sides of the circular rings (3046); The support mechanism (7) comprises a second hydraulic rod (701), a support frame (702) and a support arm (703); the outer sides of the second hydraulic rod (701) on the upper and lower sides are fixedly connected to the upper unit detection tube (6) and the lower unit detection tube (5) respectively; the free ends of the second hydraulic rod (701) are fixedly connected to the support frame (702); the other ends of the support frame (702) are fixedly connected to the support arm (703); and the support arms (703) on the upper and lower sides are staggered; The gas heating module (8) comprises a heating frame (801), a coarse filter (802) and a partition frame (803); the bottom of the heating frame (801) is fixedly connected to the bottom plate (1); the top of the heating frame (801) is connected to a second connecting pipe (11) and a first connecting pipe (9) which are distributed on the left and right; the interior of the heating frame (801) is provided with a partition frame (803) which is arranged in an L shape and divides the heating frame (801) into a heating chamber and a filtering chamber; and the partition frame (803) is provided with a plurality of connecting pipes (11) and a plurality of connecting pipes (9) which are connected to the heating chamber (801) and the filtering chamber (802); 03) is fixedly connected to the interior of a vertically arranged fine filter (804), and a coarse filter (802) fixedly connected to the heating frame (801) is arranged on one side of the fine filter (804); the outer side of the partition frame (803) is connected to an air pipe (805), and a first one-way valve (806) is installed on the outer side of the air pipe (805); a heating net (807) and a first temperature sensor (808) distributed up and down are installed inside the heating chamber of the heating frame (801).

2. The industrial metal pipeline sealing detection device according to claim 1 is characterized in that: The lower end surface of the upper unit detection tube (6) is provided with strip-shaped protrusions on both sides, and the upper end surface of the lower unit detection tube (5) is provided with strip-shaped grooves on both sides. The upper unit detection tube (6) is tightly matched with the strip-shaped grooves of the lower unit detection tube (5) through the strip-shaped protrusions.

3. The industrial metal pipeline sealing detection device according to claim 1 is characterized in that: The outer sides of the sliding shafts (3042) are fixedly connected with obliquely arranged reinforcement rods (3044), and the other ends of the reinforcement rods (3044) are fixedly connected with the sealing disk (3043).

4. The industrial metal pipeline sealing detection device according to claim 1 is characterized in that: The outer diameter of the sealing ring (305) is 1.1 times the outer diameter of the second sealing disk (303).

5. The industrial metal pipeline sealing detection device according to claim 1 is characterized in that: The lifting mechanism (13) comprises a mounting frame (1301) and a third hydraulic rod (1302); the bottom of the mounting frame (1301) is fixedly connected to the support (2); the top of the mounting frame (1301) is fixedly connected to the third hydraulic rod (1302); the free end of the third hydraulic rod (1302) is fixedly connected to a support platform (1303); the other end of the support platform (1303) is fixedly connected to a connecting block (1304); the other end of the connecting block (1304) is fixedly connected to the upper unit detection tube (6).

6. The industrial metal pipeline sealing detection device according to claim 5 is characterized in that: A vertically arranged guide column (1305) is also fixedly connected to one side of the upper side of the support platform (1303), and the outer side of the guide column (1305) is slidably connected to the mounting frame (1301).

7. The industrial metal pipeline sealing detection device according to claim 1 is characterized in that: The heating body (22) comprises a protective frame (2201), a fan (2202) and a heating rod (2203); the bottom of the protective frame (2201) is fixedly connected to the lower unit detection tube (5); the fan (2202) is installed inside the protective frame (2201); a heating rod (2203) fixedly connected to the protective frame (2201) is arranged above the fan (2202); and a breathable mesh (2204) fixedly connected to the protective frame (2201) is arranged above the heating rod (2203).

8. A detection method for an industrial metal pipeline sealing detection device according to any one of claims 1 to 7, characterized in that: The steps of the detection method are as follows: Step 1: Start the lifting mechanism (13) to drive the upper unit detection tube (6) to move up a certain distance, then place the metal pipe (20) from the side inside the lower unit detection tube (5), and then reset the lifting mechanism (13); Step 2: Multiple supporting mechanisms (7) are started synchronously and contact the metal pipe (20) to achieve pre-fixation and adjust the position, so that the metal pipe (20) is located in the center of the cylinder surrounded by the upper unit detection tube (6) and the lower unit detection tube (5), and then the sealing modules (3) on both sides are started to drive the sealing mechanism (304) to move, and the sealing mechanisms (304) are close to each other and closely contact the two ends of the metal pipe (20) to achieve sealing. During this process, multiple supporting mechanisms (7) are slowly loosened to ensure that the metal pipe (20) is adjusted to the left and right under the action of the detection module (3). After the sealing module (3) is gradually fixed, the supporting mechanism (7) is started again to achieve further contact and fixation; Step 3: Start the gas heating module (8), then transport the room temperature air inside the gas heating module (8) to the inside of the metal pipe (20) through the second pump body (12), and detect the internal air pressure of the metal pipe (20) through the first air pressure sensor (3049); Step 4: The room-temperature gas inside the gas heating module (8) is pumped into the metal pipe (20) and the inner sides of the lower unit detection tube (5) and the upper unit detection tube (6) through the first pump body (10), so as to provide a stable room-temperature environment for the metal pipe (20); Step 5: The temperature of the outer side of the metal pipe (20) is detected by the second temperature sensor (21), and during long-term use, the temperature of the outer side of the metal pipe (20) is stabilized by the heating body (22); Step 6: After a period of time, the first air pressure sensor (3049) detects the air pressure again, and then compares the two air pressures.

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