A coke oven door seal testing device

Abstract

The utility model relates to a coke oven door sealing test device, including detection room, helium source, booster pump and air suction pump, the top of detection room is open, and the upper portion is equipped with bearing frame, and the upper portion outside is equipped with motor, and the motor output shaft is upwardly fixedly connected with carousel, and the carousel is fixedly equipped with inverted L shape support board, and the horizontal part tail end of support board is fixedly equipped with first hydraulic cylinder, and the first hydraulic cylinder piston rod is downwardly fixedly connected with the pressure block, and the pressure block bottom is provided with test groove, and the test groove is equipped with helium concentration sensor, and the pressure block outside is fixedly equipped with controller, and helium concentration sensor and controller are electrically connected, and helium source gas outlet and booster pump gas inlet are communicated, and booster pump gas outlet and detection room one side lower part are communicated, and air suction pump gas inlet and detection room other side lower part are communicated, and air suction pump gas outlet is connected with discharge pipe and reflux pipe, and reflux pipe and helium source gas inlet are communicated. The utility model can effectively recover the helium used after the test, and is more economical and practical.

Description

Technical Field

[0001] This utility model belongs to the field of sealing detection technology, specifically relating to a coke oven door sealing test device. Background Technology

[0002] The sealing performance testing of coke oven doors is a crucial step in ensuring their tightness under high temperature and pressure conditions. Its primary purpose is to prevent leakage of internal media, ensuring production safety and normal equipment operation. Currently, the main methods for testing the sealing performance of coke oven doors include: 1. Visual inspection: visually inspecting the door's appearance for cracks, deformation, or corrosion; 2. Air tightness test: applying pressure to check the door's sealing performance under high pressure to ensure no gas leakage; 3. Tensile test: conducting a tensile test on the door material to test its tensile strength and ductility, determining if it meets standard requirements; 4. Thermal cycling test: cyclically heating and cooling the door in a high-temperature environment, observing its performance changes during thermal expansion and contraction; 5. Ultrasonic testing: using ultrasonic testing instruments to inspect the internal defects of the door, such as pores and cracks, ensuring the integrity of its internal structure. When using the air tightness test method, pressure is typically applied to one side of the door, while the concentration of the corresponding gas component is measured on the other side to determine the door's sealing performance. Helium is often used as the gas in this test. However, in actual testing, the existing system does not have a device for recovering the released helium, which is not conducive to subsequent testing and needs to be improved. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a coke oven door sealing test device that can effectively recover the helium gas used after the test, so as to solve the above problems.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a coke oven door sealing test device, comprising a test chamber, a helium source located outside the test chamber, a booster pump, and a vacuum pump. The test chamber has an open top, a support frame fixedly mounted inside the upper part, and a motor fixedly mounted on the outer side of the upper part. The output shaft of the motor faces upward and is fixedly connected to a turntable. An inverted L-shaped support plate is fixedly mounted on the turntable. A first hydraulic cylinder is vertically fixedly mounted on the tail end of the horizontal portion of the support plate. The piston rod of the first hydraulic cylinder faces downward and is fixedly connected to a pressure block. A test slot is provided at the bottom of the pressure block, and a helium concentration sensor is fixedly installed in the test slot. A controller is fixedly installed on the outside of the pressure block. The helium concentration sensor is electrically connected to the controller. The outlet of the helium source is connected to the inlet of the booster pump through an outlet pipe. The outlet of the booster pump is connected to the lower part of one side of the detection chamber through an inlet pipe. The inlet of the vacuum pump is connected to the lower part of the other side of the detection chamber through a vacuum pipe. A discharge pipe and a return pipe are connected in parallel to the outlet of the vacuum pump. The return pipe is connected to the inlet of the helium source.

[0005] Preferably, the inner side of the testing chamber is adapted to the coke oven door.

[0006] Preferably, sealing gaskets are fixed on the top of the support frame and on the inner wall of the detection chamber above the support frame.

[0007] Preferably, valves are provided on the air outlet pipe, air inlet pipe, air extraction pipe, exhaust pipe, and return pipe.

[0008] Preferably, a second hydraulic cylinder is vertically fixed to the bottom of the testing chamber, the piston rod of the second hydraulic cylinder faces upward and is fixedly connected to a push plate, the push plate can pass through the support frame.

[0009] Preferably, a pressure relief valve is provided on the detection chamber below the support frame.

[0010] The beneficial effects of this utility model are as follows: During testing, the furnace door is first hoisted and placed onto the support frame using existing equipment such as overhead cranes. Then, the motor is run to rotate the turntable 180 degrees, which moves the pressure block above the furnace door. Next, the first hydraulic cylinder is operated to extend its piston rod, causing the pressure block to move downwards until it presses against the furnace door, thus securing the furnace door to the support frame and completing the fixing of the furnace door. Then, the vacuum pump is run and the exhaust pipe is opened to remove air from the testing chamber below the furnace door. The vacuum pump and exhaust pipe are then closed, and the booster pump is run, with the inlet and outlet pipes opened. Helium is drawn from the helium source, pressurized, and then delivered to the testing chamber below the furnace door, thereby applying a certain air pressure to one side of the furnace door and providing the high-pressure environment required for testing. Then, the helium concentration sensor operates in real time, monitoring the helium concentration in the test chamber and feeding it back to the controller. When the concentration information received by the controller shows a significant change, it indicates a problem with the furnace door's sealing, causing helium to leak into the test chamber, and the furnace door is deemed unqualified. If the concentration information received by the controller shows no significant change, the furnace door is considered qualified, and the test is complete. After the test, the booster pump, inlet pipe, and outlet pipe are shut off, the vacuum pump is run, and the return pipe is opened. The used helium is then pumped back to the helium source through the return pipe by the vacuum pump, achieving effective helium recovery, which is more beneficial for subsequent testing and more economical and practical. Afterward, the first hydraulic cylinder is operated, causing its piston rod to retract, moving the pressure block upward and resetting it. Then, the motor is run, moving the pressure block away from above the testing chamber. Finally, the tested furnace door is hoisted away. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the main structure during the testing of this utility model.

[0013] The diagram is labeled as follows: 1 is the testing chamber, 2 is the helium source, 3 is the booster pump, 4 is the vacuum pump, 5 is the support frame, 6 is the motor, 7 is the turntable, 8 is the support plate, 9 is the first hydraulic cylinder, 10 is the pressure block, 11 is the test tank, 12 is the helium concentration sensor, 13 is the controller, 14 is the outlet pipe, 15 is the inlet pipe, 16 is the vacuum pipe, 17 is the discharge pipe, 18 is the return pipe, 19 is the sealing gasket, 20 is the valve, 21 is the second hydraulic cylinder, 22 is the push plate, and 23 is the pressure relief valve. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0015] like Figure 1 and 2 As shown, a coke oven door sealing test device includes a test chamber 1, a helium source 2 located outside the test chamber 1, a booster pump 3, and a vacuum pump 4. The test chamber 1 has an open top, a support frame 5 fixed inside the upper part, and a motor 6 fixed on the upper outer side. The output shaft of the motor 6 faces upward and is fixedly connected to a turntable 7. An inverted L-shaped support plate 8 is fixed on the turntable 7. A first hydraulic cylinder 9 is vertically fixed at the end of the horizontal part of the support plate 8. The piston rod of the first hydraulic cylinder 9 faces downward and is fixedly connected to a pressure block 10. A test groove 11 is opened at the bottom of the pressure block 10. A helium concentration sensor 12 is fixed inside the test groove 11. A controller 13 is fixed outside the pressure block 10. The helium concentration sensor 12 is electrically connected to the controller 13. The outlet of helium source 2 is connected to the inlet of booster pump 3 through outlet pipe 14. The outlet of booster pump 3 is connected to the lower part of one side of detection chamber 1 through inlet pipe 15. The inlet of vacuum pump 4 is connected to the lower part of the other side of detection chamber 1 through vacuum pipe 16. The outlet of vacuum pump 4 is connected in parallel with discharge pipe 17 and return pipe 18. Return pipe 18 is connected to the inlet of helium source 2.

[0016] During testing, the furnace door is first hoisted and placed onto the support frame 5 using existing equipment such as a gantry crane. Then, the motor 6 is run, driving the turntable 7 to rotate 180 degrees, which rotates the pressure block 10 above the furnace door. Next, the first hydraulic cylinder 9 is operated, extending its piston rod and moving the pressure block 10 downward until it presses against the furnace door, securing the furnace door 10 firmly onto the support frame 5, thus completing the fixation of the furnace door. Then, the vacuum pump 4 is run and the exhaust pipe 17 is opened to evacuate the air from the detection chamber 1 below the furnace door. The vacuum pump 4 and exhaust pipe 17 are then closed, and the booster pump 3 is run, opening the inlet pipe 14 and outlet pipe 15 to extract helium from the helium source 2, pressurize it, and deliver it to the detection chamber 1 below the furnace door, thereby applying a certain air pressure to one side of the furnace door and providing the high-pressure environment required for testing. Then, the helium concentration sensor 12 operates in real time, monitoring the helium concentration in the test chamber 11 and feeding it back to the controller 13. When the concentration information received by the controller 13 shows a significant change, it indicates that there is a problem with the seal of the furnace door, causing helium to leak into the test chamber 11, and the furnace door is unqualified. If the concentration information received by the controller 13 does not show a significant change, it indicates that the furnace door is qualified, and the test is completed. After the test, the booster pump 3, the inlet pipe 14, and the outlet pipe 15 are turned off, the vacuum pump 4 is run, and the return pipe 18 is opened. Under the pumping of the vacuum pump 4, the used helium is pumped back to the helium source 2 through the return pipe 18, achieving effective recovery of helium, which is more conducive to subsequent testing and more economical and practical. Afterwards, the first hydraulic cylinder 9 is operated to retract its piston rod, driving the pressure block 10 to move upward and reset. Then, the motor 6 is run to move the pressure block 10 away from above the test chamber 1. Finally, the tested furnace door is hoisted away. The helium source 2 can be a conventional helium cylinder or similar equipment.

[0017] In this embodiment, the inner side of the testing chamber 1 is adapted to the coke oven door to facilitate the placement of the oven door and facilitate testing.

[0018] In this embodiment, sealing gaskets 19 are fixed on the top of the support frame 5 and the inner wall of the detection chamber 1 above the support frame 5 to ensure the sealing between the furnace door and the support frame 5 and the detection chamber 1, which is more conducive to testing the sealing performance of the furnace door itself and improving the accuracy of the test results.

[0019] In this embodiment, valves 20 are provided on the air outlet pipe 14, air inlet pipe 15, air extraction pipe 16, exhaust pipe 17 and return pipe 18 to facilitate the control of the opening and closing of the corresponding pipes.

[0020] In this embodiment, a second hydraulic cylinder 21 is vertically fixed on the bottom of the inner side of the testing chamber 1. The piston rod of the second hydraulic cylinder 21 faces upward and is fixedly connected to a push plate 22. The push plate 22 can pass through the bearing frame 5. When unloading the furnace door, the second hydraulic cylinder 21 is operated to extend its piston rod, which drives the push plate 22 to move upward, so that the furnace door can be smoothly pushed out of the testing chamber. This makes it easier to cooperate with existing conventional overhead crane equipment to lift and transport the tested furnace door away.

[0021] In this embodiment, a pressure relief valve 23 is provided on the detection chamber 1 below the support frame 5. The pressure relief valve 23 can be opened after helium is recovered to connect the lower detection chamber 1 with the outside and form a positive pressure, so as to avoid the negative pressure affecting the upward movement and unloading of the furnace door.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A coke oven door sealing test device, characterized in that, The system includes a testing chamber, a helium source located outside the testing chamber, a booster pump, and a vacuum pump. The testing chamber has an open top, a support frame fixed inside the upper part, and a motor fixed on the outer side of the upper part. The output shaft of the motor faces upward and is fixedly connected to a turntable. An inverted L-shaped support plate is fixed on the turntable. A first hydraulic cylinder is vertically fixed at the end of the horizontal part of the support plate. The piston rod of the first hydraulic cylinder faces downward and is fixedly connected to a pressure block. A test slot is opened at the bottom of the pressure block, and a helium concentration sensor is fixed inside the test slot. A controller is fixed outside the pressure block, and the helium concentration sensor is electrically connected to the controller. The outlet of the helium source is connected to the inlet of the booster pump through an outlet pipe. The outlet of the booster pump is connected to the lower part of one side of the testing chamber through an inlet pipe. The inlet of the vacuum pump is connected to the lower part of the other side of the testing chamber through a vacuum pipe. A discharge pipe and a return pipe are connected in parallel to the outlet of the vacuum pump, and the return pipe is connected to the inlet of the helium source.

2. The coke oven door sealing test device according to claim 1, characterized in that, The inner side of the testing chamber is adapted to the coke oven door.

3. The coke oven door sealing test device according to claim 1, characterized in that, Sealing gaskets are fixed to the top of the support frame and the inner wall of the detection chamber above the support frame.

4. The coke oven door sealing test device according to claim 1, characterized in that, Valves are installed on the air outlet pipe, air inlet pipe, air extraction pipe, exhaust pipe, and return pipe.

5. The coke oven door sealing test device according to claim 1, characterized in that, A second hydraulic cylinder is vertically fixed to the bottom of the testing chamber. The piston rod of the second hydraulic cylinder faces upward and is fixedly connected to a push plate, which can pass through the support frame.

6. The coke oven door sealing test device according to claim 1, characterized in that, A pressure relief valve is installed on the testing chamber below the support frame.

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