Heating pipe sealing detection device

Abstract

The present invention relates to the technical field of heating pipe detection, and specifically to a heating pipe sealing detection device, comprising a pipe rack detachably mounted on the end of the heating pipe by means of a flange connection, a simulation mechanism for simulating the actual working condition of a hot water pipe, and a pressure relief mechanism for safely and quickly relieving the pressure of the heating pipe during an air pressure test. The present invention intermittently strikes a vibration column through a driving component, causing the vibration column to intermittently move toward the inside of the heating pipe, thereby occupying the internal space inside the heating pipe through the vibration column, and further causing continuous small-scale fluctuations in the test water pressure inside the heating pipe, so as to simulate the working condition that the buried heating pipe needs to withstand periodic pressure fluctuations caused by the dynamic load of the vehicle; the impact component adopted by the present invention intermittently strikes the hammer member, causing the hammer member to exert instantaneous impact on the test water inside the heating pipe, thereby simulating the working condition of the heating pipe when encountering the water hammer effect.

Description

Technical Field

[0001] The present invention relates to the technical field of heating pipeline detection, in particular to a heating pipeline sealing detection device. Background Art

[0002] Heating pipes are used to transport heating media to achieve the transmission and distribution of heat energy from the heat source to the user. Heating pipes are divided into hot water pipes with hot water as the heat medium and steam pipes with steam as the heat medium. Heating pipes are generally buried directly underground. They have the advantages of small footprint, good thermal insulation effect, and beautiful appearance. They are currently the commonly used laying method for urban heating pipes.

[0003] The sealing of heating pipes has a vital impact on their performance. Good sealing can ensure efficient heat transmission in the pipes and reduce heat loss due to leakage. Therefore, when laying heating pipes, their sealing needs to be tested. At present, pressure tests are usually used to test the sealing of heating pipes. Pressure tests include water pressure tests and air pressure tests. Usually, the corresponding selection is made according to the heat medium inside the heating pipes.

[0004] During the test, one end of the heating pipe is usually sealed, and then a pressure medium (water or air) is introduced into the other end until the medium pressure inside the heating pipe reaches the test standard. The heating pipe is then placed for a period of time, during which the medium pressure inside the heating pipe is tested using a pressure gauge. If the pressure gauge reading can be maintained within a certain range within the specified time, it can be determined that the sealing of the heating pipe is qualified.

[0005] However, the existing test equipment can only provide static pressure test results when conducting water pressure tests. It is unable to simulate the continuous small-scale pressure fluctuations caused by vehicles running over the road surface with pre-buried heating pipes, and the real working conditions of the instantaneous pressure surge caused by the water hammer effect (when the fluid flows in the pipe, the fluid momentum changes sharply due to the sudden closing or opening of the valve, the start and stop of the pump, etc., thereby generating pressure waves in the pipe). As a result, the test results are relatively one-sided. In addition, after the air pressure test, the existing equipment relies on a single pressure relief valve to exhaust air, and the exhaust and pressure relief speed is slow. At the initial stage of pressure relief, the air pressure inside the heating pipe is high. When the high-pressure gas is instantly released through the pressure relief valve, the air flow speed is fast, which can easily cause pipe vibration, seal failure, and even equipment burst, posing a safety risk. Summary of the Invention

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a heating pipe sealing detection device, including a pipe rack that can be detachably installed at the end of the heating pipe by means of a flange connection, a sealing block is provided inside the pipe rack for sliding left and right, a connecting pipe is fixedly installed on the upper part of the pipe rack, and an air pressure gauge and a water pressure gauge are respectively provided on the upper part of the pipe rack and on the front and rear sides of the connecting pipe. The device also includes a simulation mechanism for simulating the actual working conditions of the hot water pipe, and the device also includes a pressure relief mechanism for safely and quickly relieving the pressure of the heating pipe during the air pressure test.

[0007] The simulation mechanism includes a hammer piece that is slidably arranged in the middle of the sealing block, and vibration columns that are slidably connected to the sealing block are arranged at equal intervals along the circumference of the sealing block. The simulation mechanism also includes a driving component for knocking the vibration columns one by one, and the simulation mechanism also includes an impact component for intermittently hammering the hammer piece to the left.

[0008] The pressure relief mechanism includes a rotating ring plate that is coaxially rotated and arranged on the right side of the sealing block. A square tube is coaxially fixedly installed on the right side of the rotating ring plate through a support column. A disc plate is rotatably arranged on the right side inside the pipe rack. The square tube slides left and right and is inserted into the middle of the disc plate. A friction block is symmetrically fixed on the left side of the disc plate through a spring telescopic rod. A number of rotating rollers are arranged in the middle of the square tube corresponding to the position of the friction block and rotated at equal intervals along the left and right directions.

[0009] Preferably, the driving assembly includes several fixing frames fixedly installed on the right side of the sealing block and corresponding one-to-one to the vibration columns. A knocking piece is provided on the left side of the fixing frame for sliding left and right through a sliding guide column. A pushing spring is provided between the sliding guide column and the corresponding knocking piece. Several pushing rings corresponding one-to-one to the vibration columns are rotatably provided on the right side of the sealing block.

[0010] Preferably, the knocking piece is composed of a tubular structure closed on the left side and a rod-shaped structure equidistantly arranged circumferentially on the outer side of the tubular structure, and the tubular structure is slidably connected to the outer side of the sliding guide column, and the pushing spring is arranged between the left side of the sliding guide column and the inner wall of the tubular structure. The left end of the rod-shaped structure of the knocking piece is chamfered, and the pushing ring is provided with oblique pushing grooves equidistantly along its circumference for pushing the rod-shaped structure of the knocking piece to the right.

[0011] Preferably, the pushing ring is coaxial with the corresponding vibration column, a driven gear is fixedly mounted on the outer side of the pushing ring, and an incomplete gear meshing with the driven gear at the corresponding position is fixedly mounted on the outer side of the rotating ring plate.

[0012] Preferably, a reduction motor is fixedly mounted on the upper outer portion of the pipe rack, and the reduction motor drives the disc plate to rotate circumferentially through gear transmission.

[0013] Preferably, the impact assembly includes an impact rod that is slidably arranged on the left side of the square tube, a limiting ring is fixedly installed on the right side of the square tube, and a coil spring is arranged between the limiting ring and the impact rod. The impact assembly also includes a force storage part for pulling the impact rod to the right and compressing the coil spring to store force.

[0014] Preferably, the force storage part includes a support plate frame fixedly installed on the right side of the pipe rack, and a moving rod coaxial with the pipe rack is provided on the support plate frame for sliding left and right. A reciprocating thread is provided on the left side of the moving rod, and the moving rod is connected to the square pipe thread through the reciprocating thread. A plug-in rod is fixedly installed on the left side of the moving rod.

[0015] Preferably, two symmetrically arranged fasteners are provided on the plug-in rod for sliding back and forth. The fasteners themselves are symmetrically arranged left and right. A return spring is provided between the two fasteners. A stepped hole is provided on the right side of the impact rod for inserting the fasteners and the plug-in rod.

[0016] Preferably, a blocking locking plate is provided on the right side of the disc plate for radial sliding, and the blocking locking plate is used to block and limit the other pipe. An adjusting threaded rod is rotatably provided on the blocking locking plate, and the adjusting threaded rod is threadedly connected to the disc plate.

[0017] Preferably, a pressure relief hole penetrating the inside and outside of the pipe rack is opened on the upper part of the pipe rack, the pressure relief hole is located on the right side of the sealing block, and a sealing plate for sealing the pressure relief hole is fixedly installed on the upper right side of the sealing block.

[0018] The beneficial effects of the present invention are: 1. The present invention intermittently taps the vibration column through the driving component, so that the vibration column intermittently moves into the interior of the heating pipe, thereby invading the internal space inside the heating pipe through the vibration column, and then causing continuous small-scale fluctuations in the test water pressure inside the heating pipe, so as to simulate the working conditions of the buried heating pipe that needs to withstand periodic pressure fluctuations caused by vehicle dynamic loads, improve the accuracy of the test results, and increase the comprehensiveness of the test results.

[0019] 2. The impact assembly adopted in the present invention intermittently impacts the hammer member, so that the hammer member applies instantaneous impact to the test water inside the heating pipe, thereby simulating the working conditions of the heating pipe when encountering the water hammer effect, further improving the comprehensiveness of the test results, and the vibration column and the hammer member can also move simultaneously, further simulating the complex actual working conditions of the heating pipe.

[0020] 3. The present invention uses a sealing block to isolate the space inside the pipe rack. During pressure relief, the high-pressure gas inside the heating pipe can push the sealing block to move, thereby safely reducing the pressure inside the heating pipe by increasing the space of the heating pipe. Moreover, by changing the friction form between the friction block and the square tube twice, the sealing block can move at three speeds, thereby performing progressive pressure relief, thereby increasing the pressure relief speed while ensuring the safety of pressure relief.

[0021] 4. The present invention uses multiple circumferentially arranged vibration columns to vibrate different positions of the test water inside the heating pipe, further making the detection environment conform to actual complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and examples.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention when connected to a heating pipe.

[0024] Figure 2 It is a cross-sectional view of the present invention after removing the reduction motor.

[0025] Figure 3 It is a cross-sectional view of the sealing block, square tube, rotating ring plate and knocking piece in the present invention.

[0026] Figure 4 It is a cross-sectional view of the sealing block, hammer piece, vibrating column and pushing ring in the present invention.

[0027] Figure 5 It is a cross-sectional view of the sliding guide post, the knocking member and the pushing ring member in the present invention.

[0028] Figure 6 It is a partial fracture cross-sectional view of the hammer member, the impact rod and the buckle member in the present invention.

[0029] Figure 7 It is a structural schematic diagram of the pipe rack, reduction motor and disc plate in the present invention.

[0030] In the figure: 1, pipe rack; 2, sealing block; 3, connecting pipe; 4, air pressure gauge; 5, water pressure gauge; 6, simulation mechanism; 7, pressure relief mechanism; 61, hammer; 62, vibration column; 63, drive assembly; 64, impact assembly; 71, rotating ring plate; 72, square tube; 73, disc plate; 74, spring telescopic rod; 75, friction block; 76, rotating roller; 77, pressure relief hole; 78, sealing plate; 63 1. Fixed frame; 632. Sliding guide column; 633. Knocking member; 634. Pushing ring; 635. Reducer motor; 636. Driven gear; 637. Incomplete gear; 641. Impact rod; 642. Limiting ring; 643. Power storage part; 644. Support plate frame; 645. Moving rod; 646. Connecting rod; 647. Fastener; 711. Blocking locking plate; 712. Adjusting threaded rod. DETAILED DESCRIPTION

[0031] The following embodiments of the present invention are described in detail. The embodiments described below are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, the techniques or conditions described in the literature in the art or in the product specifications shall be followed.

[0032] See Figure 1 and Figure 2 A heating pipe sealing detection device includes a pipe rack 1 connected to the end of the heating pipe by a flange connection, a sealing block 2 is provided inside the pipe rack 1 for sliding left and right, a connecting pipe 3 is fixedly installed on the upper part of the pipe rack 1, and an air pressure gauge 4 and a water pressure gauge 5 are respectively provided on the upper part of the pipe rack 1 and on the front and rear sides of the connecting pipe 3; the device also includes a simulation mechanism 6 for simulating the actual working conditions of the hot water pipe, and a pressure relief mechanism 7 for safely and quickly relieving the pressure of the heating pipe during the air pressure test.

[0033] When it is necessary to test the sealing performance of the heating pipe, first, the pipe rack 1 is fixedly connected to the pipe by means of a flange connection. Then, the test medium is introduced into the interior of the pipe rack 1 through the connecting pipe 3 according to the heat medium form of the heating pipe, that is, test water is introduced into the interior of the hot water heating pipe / air is introduced into the interior of the steam heating pipe, and the test medium is made to fill the interior of the heating pipe and the space between the pipe rack 1 and the left side of the sealing block 2, and the test medium pressure inside the heating pipe reaches the calibration value. Then, the test medium pressure inside the heating pipe is monitored by the air pressure gauge 4 or the water pressure gauge 5 according to the different test media.

[0034] It should be noted that, in this embodiment, an air pump and a water pressure pump in the prior art are used to introduce the test medium into the heating pipe, and a flange-connected block is used to seal the other end of the pipe.

[0035] During the water pressure test, the simulation mechanism 6 is used to make the test water pressure inside the heating pipe fluctuate continuously within a small range, so as to simulate the working condition of the buried heating pipe being subjected to periodic pressure fluctuations caused by the dynamic load of the vehicle. At the same time, the simulation mechanism 6 can also simulate the water hammer effect by hammering to apply an impact load to the test water, thereby simulating the actual working condition of the hot water heating pipe for testing.

[0036] After the test is completed for a specified time, the sealing of the heating pipe is judged by the reading of the air pressure gauge 4 or the water pressure gauge 5. When the reading is lower than the specified value, the sealing of the heating pipe is judged to be unqualified. When the reading is not lower than the specified value, the sealing of the heating pipe is judged to be qualified.

[0037] It should be noted that valves are provided at the connections between the air pressure gauge 4, the water pressure gauge 5 and the pipe rack 1. The operator selects the connection between the air pressure gauge 4, the water pressure gauge 5 and the pipe rack 1 by manually turning the valves open and closed; that is, when the air pressure test is performed on the heating pipeline, the air pressure gauge 4 is connected to the pipe rack 1, and the water pressure gauge 5 is not connected to the pipe rack 1; when the water pressure test is performed on the heating pipeline, the water pressure gauge 5 is connected to the pipe rack 1, and the air pressure gauge 4 is not connected to the pipe rack 1.

[0038] After the air pressure test is completed, the pressure relief mechanism 7 controls the sealing block 2 to move in three stages, thereby gradually increasing the space of the heating pipe, reducing the pressure inside the heating pipe, and safely and quickly releasing the pressure.

[0039] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 7 The simulation mechanism 6 includes vibration columns 62 that are evenly spaced along the circumference of the sealing block 2 and slide left and right inside it. The pressure relief mechanism 7 includes a rotating ring plate 71 that is rotatably arranged on the right side of the sealing block 2. The rotating ring plate 71 is coaxial with the sealing block 2. A square tube 72 is fixedly installed on the right side of the rotating ring plate 71 through a support column. A disc plate 73 is rotatably arranged on the right side of the pipe rack 1. The square tube 72 slides left and right and is inserted into the center position of the disc plate 73. A reduction motor 635 is fixedly installed on the upper outer side of the pipe rack 1. The reduction motor 635 drives the disc plate 73 to rotate circumferentially through gear transmission.

[0040] It should be noted that the gear transmission method in this embodiment can be achieved by fixing a driving gear on the output shaft of the reduction motor 635, fixing a gear ring on the outer side of the disc plate 73, and making the driving gear mesh with the gear ring. At the same time, the number of teeth of the driving gear is much less than the number of teeth of the gear ring, which can achieve the effect of amplifying the output torque of the reduction motor 635, thereby enabling the reduction motor 635 to drive the disc plate 73 to rotate more smoothly. The driving gear and the gear ring are not shown in the figure.

[0041] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The simulation mechanism 6 also includes a driving assembly 63 for knocking the vibration columns 62 one by one. The driving assembly 63 includes several fixing frames 631 fixedly installed on the right side of the sealing block 2 and corresponding to the vibration columns 62. A knocking member 633 is provided on the left side of the fixing frame 631 for sliding left and right through a sliding guide column 632. A pushing spring is provided between the sliding guide column 632 and the corresponding knocking member 633. Several pushing rings 634 corresponding to the vibration columns 62 are rotatably provided on the right side of the sealing block 2.

[0042] See Figure 4 and Figure 5 The knocking piece 633 is composed of a tubular structure closed on the left side and a rod-shaped structure equidistantly arranged on the outer side of the tubular structure. The tubular structure is slidably connected to the outer side of the sliding guide column 632. The pushing spring is arranged between the left end face of the sliding guide column 632 and the inner wall of the tubular structure. The rod-shaped structure of the knocking piece 633 is L-shaped and the left end of the horizontal section is chamfered. The pushing ring 634 is provided with oblique pushing grooves equidistantly along its circumference for pushing the rod-shaped structure of the knocking piece 633 to the right.

[0043] See Figure 3 and Figure 4 The pushing ring 634 is coaxial with the corresponding vibration column 62 , a driven gear 636 is fixedly mounted on the outside of the pushing ring 634 , and an incomplete gear 637 meshing with the driven gear 636 at the corresponding position is fixedly mounted on the outside of the rotating ring plate 71 .

[0044] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 7 When the hot water heating pipe is subjected to a water pressure test, the reduction motor 635 is started to drive the disc plate 73 to rotate. The disc plate 73 drives the rotating ring plate 71 to rotate through the square tube 72. The rotating ring plate 71 drives the incomplete gear 637 on it to engage with the driven gear 636 one by one along the circumference of the sealing block 2.

[0045] When the incomplete gear 637 is engaged with the driven gear 636, the incomplete gear 637 drives the driven gear 636 to rotate, and the driven gear 636 drives the pushing ring 634 at the corresponding position to rotate. The pushing ring 634 pushes the rod-shaped structure of the knocking member 633 to the right through the oblique pushing groove thereon, so that the tubular structure of the knocking member 633 moves synchronously to the right and compresses the pushing spring at the corresponding position.

[0046] When the oblique pushing groove on the pushing ring 634 rotates to the point where it no longer cooperates with the rod-shaped structure of the pushing knocking piece 633, the pushing spring pushes the knocking piece 633 to move quickly to the left through its own elastic force and knocks the right end face of the vibration column 62, causing the vibration column 62 to vibrate, and then the vibration column 62 vibrates the test water inside the heating pipe, and then the knocking piece 633 is intermittently pushed by the continuously rotating pushing ring 634, causing the vibration column 62 to continuously vibrate the test water, simulating the working condition of the buried heating pipe being subjected to periodic pressure fluctuations caused by the dynamic load of the vehicle.

[0047] Then the incomplete gear 637 rotates to engage with the next driven gear 636, thereby replacing the next vibration column 62 to vibrate the test water inside the heating pipe, and then changing the vibration position of the test water, further simulating the working condition of the buried heating pipe under the periodic pressure fluctuations caused by the dynamic load of the vehicle.

[0048] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 6 The simulation mechanism 6 includes a hammer member 61 that is slidably arranged on the axis of the sealing block 2, and an impact assembly 64 for intermittently hammering the hammer member 61 to the left. The impact assembly 64 includes an impact rod 641 that is slidably arranged on the left side of the square tube 72. The impact rod 641 is coaxial with the hammer member 61. A limiting ring 642 is fixedly installed on the right side of the square tube 72. A coil spring is arranged between the limiting ring 642 and the impact rod 641. The impact assembly 64 also includes a force storage part 643 for pulling the impact rod 641 to the right and compressing the coil spring to store force.

[0049] See Figure 1 、 Figure 2 、 Figure 3 and Figure 6 The force storage part 643 includes a support plate frame 644 fixedly installed on the right side of the pipe rack 1, and a moving rod 645 coaxial with the pipe rack 1 is slidingly provided on the support plate frame 644. A reciprocating thread is provided on the left side of the moving rod 645. The moving rod 645 is threadedly connected to the square tube 72 through the reciprocating thread. A plug-in rod 646 is fixedly installed on the left side of the moving rod 645. The plug-in rod 646, the moving rod 645 and the limiting ring 642 are all coaxial, and the plug-in rod 646 is located inside the coil spring.

[0050] See Figure 3 and Figure 6 Two symmetrically arranged snap fasteners 647 are provided on the plug-in rod 646 for sliding back and forth. The snap fasteners 647 themselves are arranged symmetrically on the left and right. A return spring is provided between the two snap fasteners 647. A stepped hole is provided on the right side of the impact rod 641 for inserting the snap fastener 647 and the plug-in rod 646.

[0051] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 6 When the disc plate 73 rotates, the moving rod 645 is threadedly connected to the square tube 72 through a reciprocating thread, so the moving rod 645 will move back and forth, and then the moving rod 645 drives the plug-in rod 646 to move synchronously. When the plug-in rod 646 moves to the left, the plug-in rod 646 drives the clip 647 thereon to be inserted into the stepped hole of the impact rod 641, so that the inner wall of the stepped hole of the impact rod 641 pushes the clip 647 in the direction close to the axis of the plug-in rod 646, and the return spring is compressed. When the plug-in rod 646 is fully inserted into the stepped hole of the impact rod 641, the return spring pushes the clip 647 in the direction away from the axis of the plug-in rod 646 to the initial position through its own elastic force, so that the clip 647 is blocked in the stepped hole of the impact rod 641, and the impact rod 641 and the plug-in rod 646 are plugged into a whole.

[0052] Under the action of the reciprocating thread on the moving rod 645, the moving rod 645 will then drive the plug-in rod 646 to move to the left, and the plug-in rod 646 will drive the impact rod 641 to move to the right synchronously through the snap 647, so that the impact rod 641 compresses the coil spring, and when the plug-in rod 646 drives the snap 647 to move to contact with the limiting ring 642, the limiting ring 642 pushes the snap 647 through its inner wall toward the direction close to the axis of the plug-in rod 646, so that the snap 647 no longer blocks the stepped hole of the impact rod 641, and the impact rod 641 and the plug-in rod 646 are released from the plug-in fixation, and then the coil spring pushes the impact rod 641 to move quickly to the left through its own elastic force until it impacts the hammer part 61, so that the hammer part 61 simulates the water hammer effect and applies an impact load to the test water, further simulating the complex working conditions of the hot water heating pipeline in actual use.

[0053] Then, the water pressure test of the hot water heating pipe is continued for the specified time. The operator judges the sealing of the hot water heating pipe by observing the reading of the water pressure gauge 5. When the reading of the water pressure gauge 5 is lower than the specified value, the sealing of the hot water heating pipe is judged to be unqualified. When the reading of the water pressure gauge 5 is not lower than the specified value, the sealing of the hot water heating pipe is judged to be qualified.

[0054] After the water pressure test is completed, due to the incompressibility of water, the water pressure of the test water inside the hot water heating pipe can automatically return to normal. Then open the other end of the hot water heating pipe to discharge the test water inside the hot water heating pipe to complete the water pressure test.

[0055] See Figure 1 、 Figure 2 and Figure 7 The pressure relief mechanism 7 also includes two symmetrically arranged friction blocks 75 fixedly mounted on the left side of the disc plate 73 by a spring telescopic rod 74. A rotating roller 76 is provided in the middle of the square tube 72 at a position corresponding to the friction block 75 and rotated at equal intervals along the left and right directions. The surface of the rotating roller 76 is smooth. A pressure relief hole 77 is provided on the upper part of the pipe rack 1, which passes through the inside and outside of the pipe rack 1. The pressure relief hole 77 is located on the right side of the sealing block 2. A sealing plate 78 for sealing the pressure relief hole 77 is fixedly mounted on the upper right side of the sealing block 2.

[0056] Continue reading Figure 1 、 Figure 2 and Figure 7 A blocking locking plate 711 is provided on the right side of the disc plate 73 for radial sliding. The blocking locking plate 711 is used to block and limit the other tube 72. An adjusting threaded rod 712 is rotatably provided on the blocking locking plate 711, and the adjusting threaded rod 712 is threadedly connected to the disc plate 73.

[0057] After the steam heating pipeline is tested continuously for the specified time, the operator judges the sealing of the steam heating pipeline by observing the reading of the pressure gauge 4. When the reading of the pressure gauge 4 is lower than the specified value, the sealing of the steam heating pipeline is judged to be unqualified. When the reading of the pressure gauge 4 is not lower than the specified value, the sealing of the steam heating pipeline is judged to be qualified.

[0058] The operator then manually turns the adjusting threaded rod 712, so that the adjusting threaded rod 712 drives the blocking locking plate 711 to move to the upper side of the square tube 72, so that the square tube 72 is no longer blocked by the blocking locking plate 711, thereby allowing the high-pressure gas inside the steam heating pipe to push the sealing block 2 to the right, and the sealing block 2 drives the square tube 72 to move synchronously. When the sealing block 2 moves to the right, the volume of the pipe rack 1 located on the left side of the sealing block 2 is increased, so that the high-pressure gas inside the steam heating pipe further flows into the interior of the pipe rack 1, thereby safely reducing the pressure inside the steam heating pipe.

[0059] In the initial state, the spring-loaded telescopic rod 74 uses its own elastic force to push the corresponding friction block 75 against the outer surface of the right portion of the square tube 72. There is sufficient contact pressure between the friction block 75 and the outer surface of the right portion of the square tube 72. Therefore, during the initial movement of the square tube 72, sliding friction will be generated between the friction block 75 and the square tube 72. The sliding friction of the friction block 75 on the square tube 72 limits the movement speed of the square tube 72, thereby preventing the sealing block 2 from moving rapidly under the push of the high-pressure gas, further ensuring pressure relief safety.

[0060] Then the square tube 72 drives the rotating roller 76 thereon to move to contact with the friction block 75. The contact pressure between the rotating roller 76 and the friction block 75 is appropriate, and the friction block 75 changes from sliding friction on the square tube 72 to rolling friction on the rotating roller 76, thereby increasing the moving speed of the square tube 72 to the right, making the sealing block 2 move quickly in the middle of the movement, thereby increasing the pressure relief speed.

[0061] Then the outer side surface of the left part of the square tube 72 is in sliding friction contact with the friction block 75 to buffer and slow down the fast-moving sealing block 2; in summary, by moving the sealing block 2 in three stages, the air pressure inside the steam heating pipeline is quickly and safely reduced.

[0062] When the sealing block 2 moves, it will drive the sealing plate 78 on it to move synchronously. When the sealing block 2 moves to the right side of the pressure relief hole 77, the air pressure inside the steam heating pipe is reduced to a safe value. At the same time, the sealing block 2 and the sealing plate 78 no longer block the pressure relief hole 77, so that the inside of the steam heating pipe is connected to the outside through the pressure relief hole 77, thereby quickly reducing the air pressure inside the steam heating pipe to normal pressure, thereby completing the air pressure test.

[0063] See Figures 1 to 7 When testing the sealing performance of a heating pipeline, the present invention specifically includes the following steps: First, a pipe rack 1 is fixedly connected to the pipeline by a flange connection, and then a test medium is introduced into the interior of the pipe rack 1 through a connecting pipe 3 according to the heat medium form of the heating pipeline, and then the pressure of the test medium inside the heating pipeline is monitored by an air pressure gauge 4 or a water pressure gauge 5 according to the different test media.

[0064] In the second step, when the hot water heating pipe is subjected to a water pressure test, the reduction motor 635 is started to drive the incomplete gear 637 to rotate, so that the incomplete gear 637 drives the push ring 634 to rotate one by one along the circumferential direction, so that the knocking piece 633 at the corresponding position continuously vibrates the test water through the vibration column 62.

[0065] In the third step, the incomplete gear 637 is then rotated to engage with the next driven gear 636, thereby replacing the next vibration column 62 to vibrate the test water inside the heating pipe, thereby changing the vibration position of the test water.

[0066] In the fourth step, the disc plate 73 drives the plug-in rod 646 to move back and forth, so that the impact rod 641 intermittently impacts the hammer member 61, thereby causing the hammer member 61 to simulate the water hammer effect and apply an impact load to the test water.

[0067] The fifth step is to conduct a water pressure test on the hot water heating pipe for a specified time. The operator judges the sealing of the hot water heating pipe by observing the reading of the water pressure gauge 5. When the reading of the water pressure gauge 5 is lower than the specified value, the sealing of the hot water heating pipe is judged to be unqualified. When the reading of the water pressure gauge 5 is not lower than the specified value, the sealing of the hot water heating pipe is judged to be qualified.

[0068] The sixth step is to stop pressurizing the inside of the connecting pipe 3. After stopping pressurization, the water pressure of the test water inside the hot water heating pipe can automatically return to normal. Then open the other end of the hot water heating pipe to discharge the test water inside the hot water heating pipe to complete the water pressure test.

[0069] Step 7. After the steam heating pipeline is tested for a specified time, the operator judges the sealing of the steam heating pipeline by observing the reading of the pressure gauge 4. When the reading of the pressure gauge 4 is lower than the specified value, the sealing of the steam heating pipeline is judged to be unqualified. When the reading of the pressure gauge 4 is not lower than the specified value, the sealing of the steam heating pipeline is judged to be qualified.

[0070] In the eighth step, the operator manually turns the adjusting threaded rod 712 so that the high-pressure gas inside the steam heating pipe pushes the sealing block 2 to the right. At the same time, the sealing block 2 is moved in three stages through the friction block 75, so that the air pressure inside the steam heating pipe is quickly and safely reduced.

[0071] In the ninth step, the sealing block 2 is moved to the right side of the pressure relief hole 77, and the air pressure inside the steam heating pipe is reduced to a safe value. At the same time, the inside of the steam heating pipe is connected to the outside through the pressure relief hole 77, thereby quickly reducing the air pressure inside the steam heating pipe to normal pressure and completing the air pressure test.

[0072] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, which are still covered by the scope of protection of the present invention.

Claims

1. A heating pipe sealing detection device, comprising a pipe rack detachably mounted on the end of the heating pipe, characterized in that: A sealing block is provided inside the pipe rack for sliding left and right, and a connecting pipe is fixedly installed on the top of the pipe rack; A simulation mechanism for simulating the actual working conditions of hot water pipes; a pressure relief mechanism for safely and quickly relieving pressure on heating pipes during air pressure tests; The simulation mechanism includes a hammer piece slidably arranged in the middle of the sealing block, and vibration columns slidably connected to the sealing block are arranged at equal intervals along the circumference of the sealing block. The simulation mechanism also includes a driving assembly for striking the vibration columns one by one and an impact assembly for intermittently hammering the hammer member to the left; The pressure relief mechanism includes a rotating ring plate coaxially rotatably arranged on the right side of the sealing block, a square tube coaxially mounted on the right side of the rotating ring plate, a disc plate rotatably arranged on the right side inside the tube rack, the square tube slidably arranged in the middle of the disc plate, a friction block symmetrically fixedly mounted on the left side of the disc plate through a spring telescopic rod, and a plurality of rotating rollers rotatably arranged in the middle of the square tube corresponding to the position of the friction block; By changing the friction form between the friction block and the square tube, the moving speed of the sealing block is adjusted to implement progressive pressure relief; The driving assembly includes a plurality of fixed brackets fixedly mounted on the right side of the sealing block and corresponding to the vibration columns one by one. A knocking piece is provided on the left side of the fixed bracket for sliding left and right through a sliding guide column. A push spring is provided between the sliding guide column and the corresponding knocking piece. A plurality of push rings corresponding to the vibration columns are provided for rotation on the right side of the sealing block. The knocking member is composed of a tubular structure closed on the left side and a rod-shaped structure equidistantly arranged on the outer side of the tubular structure. The tubular structure is slidably connected to the outer side of the sliding guide post. The push spring is arranged between the left side of the sliding guide post and the inner wall of the tubular structure. The left end of the rod-shaped structure of the knocking member is chamfered. The pushing ring is provided with oblique pushing grooves equidistantly along its circumference for pushing the rod-shaped structure of the knocking member to the right. The pushing ring is coaxial with the corresponding vibration column, a driven gear is fixedly mounted on the outside of the pushing ring, and an incomplete gear meshing with the driven gear at the corresponding position is fixedly mounted on the outside of the rotating ring plate; A reduction motor is fixedly installed on the upper outer portion of the pipe rack, and the reduction motor drives the disc plate to rotate circumferentially through gear transmission.

2. A heating pipe sealing detection device according to claim 1, characterized in that: The impact assembly includes an impact rod that is slidingly arranged on the left side of the square tube, a limiting ring is fixedly installed on the right side of the square tube, and a coil spring is arranged between the limiting ring and the impact rod. The impact assembly also includes a force storage part for pulling the impact rod to the right and compressing the coil spring to store force.

3. A heating pipe sealing detection device according to claim 2, characterized in that: The force storage part includes a support plate frame fixedly installed on the right side of the pipe rack, and a moving rod coaxial with the pipe rack is provided on the support plate frame for sliding left and right. A reciprocating thread is provided on the left side of the moving rod, and the moving rod is connected to the square pipe thread through the reciprocating thread. A plug-in rod is fixedly installed on the left side of the moving rod.

4. A heating pipe sealing detection device according to claim 3, characterized in that: Two symmetrically arranged snap fasteners are provided on the plug-in rod for sliding back and forth. The snap fasteners themselves are symmetrically arranged left and right. A return spring is provided between the two snap fasteners. A stepped hole is provided on the right side of the impact rod for inserting the snap fastener and the plug-in rod.

5. A heating pipe sealing detection device according to claim 1, characterized in that: A blocking locking plate is provided on the right side of the disc plate for radial sliding. The blocking locking plate is used to block and limit the other pipe. An adjusting threaded rod is rotatably provided on the blocking locking plate. The adjusting threaded rod is threadedly connected to the disc plate.

6. A heating pipe sealing detection device according to claim 1, characterized in that: The upper part of the pipe rack is provided with a pressure relief hole which passes through the inside and outside of the pipe rack. The pressure relief hole is located on the right side of the sealing block. A sealing plate for sealing the pressure relief hole is fixedly installed on the upper right side of the sealing block.

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