Explosion-proof detection probe for leakage of floating disc and floating box in storage tank and use method of explosion-proof detection probe

Abstract

The invention discloses an explosion-proof detection probe for leakage of a floating disc and a floating box in a storage tank and a use method, and belongs to the technical field of detection equipment. The detection assembly comprises a shell, a screw rod and a probe body; a mounting hole is formed in the top wall of the shell, and a mounting rod is slidably mounted in the mounting hole; a threaded hole is formed in the end, away from the mounting hole, of the mounting rod, the screw is mounted in the threaded hole in a threaded mode, the probe body is fixedly mounted at the end, away from the mounting hole, of the screw, and a driving mechanism for driving the mounting rod to move is arranged on the shell. A sliding groove is formed in the top wall of the shell. According to the scheme, the adjusting mechanism is matched with the clamping rod, the clamping rod is completely attached to the outer wall of the buoy, stable pressing of the probe body and the buoy wall is finally achieved through rigid connection of the clamping rod, then the screw rod is rotated to stretch out of the threaded hole, the probe body is driven by the screw rod to be tightly pressed on a detection point smeared with a coupling agent, and it is ensured that acoustic coupling is stable; and the detection precision is ensured.

Description

Technical Field

[0001] This invention relates to the field of detection equipment technology, and more specifically, to a leak-proof and explosion-proof detection probe for floating roofs and pontoons inside storage tanks and its usage method. Background Technology

[0002] In petrochemical storage tanks, hollow floats made of aluminum or 304 stainless steel are commonly used to float on the surface of the petrochemical liquid inside the tank. This significantly reduces the contact area between the liquid and the air above, thereby effectively suppressing the volatilization of the petrochemical liquid.

[0003] To ensure safety, storage tanks must be opened after each use to check for leaks inside the floats due to seal failure. This inspection is crucial: a missed leak could not only lead to deterioration of the stored medium but also trigger a violent chemical reaction, posing a significant risk of explosion. Therefore, reliable internal leak detection of hollow floats is central to ensuring the safe operation of storage tanks. However, in practice, when conducting batch inspections of floats of varying sizes, the inspection head needs frequent adjustments according to specifications, a process that severely restricts overall work efficiency.

[0004] Therefore, a leak detection probe for floating roofs and pontoons inside storage tanks and its usage method are proposed. Summary of the Invention

[0005] To address the problems existing in the prior art, the purpose of this invention is to provide a leak-proof and explosion-proof detection probe for floating roofs and pontoons inside storage tanks and its usage method, which can improve detection efficiency.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] An explosion-proof detection probe for leakage of floating roofs and pontoons in storage tanks includes a main unit, a communication line, and detection components; The detection components include a housing, a screw, and a probe body; The top wall of the housing has a mounting hole, in which a mounting rod is slidably installed; the end of the mounting rod away from the mounting hole has a threaded hole, and the screw is threaded into the mounting hole. The probe body is fixedly installed at the end of the screw away from the mounting hole, and the housing has a drive mechanism for driving the mounting rod to move. The top wall of the housing is provided with a sliding groove, and two sliders are slidably installed in the sliding groove. A locking rod is fixedly installed at an angle on the top wall of the slider, and an adjustment mechanism that cooperates with the slider is provided in the sliding groove. The clamp rod has a cavity, and air holes are evenly distributed on the side wall of the cavity. An elastic pad is fixedly installed on the side wall of the clamp rod, and the elastic pad is located between the air holes and the shell. The clamp rod is also equipped with an air supply mechanism for supplying air to the cavity.

[0008] Furthermore, the adjustment mechanism includes a bidirectional threaded rod rotatably installed in the slide groove, two sliders symmetrically arranged on the bidirectional threaded rod, both sliders being threadedly connected to the bidirectional threaded rod, and a guide rod passing through the sliders being horizontally fixedly installed in the slide groove.

[0009] Furthermore, the air supply mechanism includes a mounting groove on the side wall of the lever, an elastic pad is installed in the mounting groove, and a pressurization chamber is provided on the elastic pad. An air pipe extending into the cavity is inserted into the side wall of the pressurization chamber.

[0010] Furthermore, the drive mechanism includes an elastic membrane fixedly installed in the mounting hole, the bottom end of the mounting rod being fixedly connected to the elastic membrane, a friction pad of elastic material being fixedly installed on the side wall of the housing, a cavity being opened on the friction pad, and a connecting tube extending into the cavity being inserted into the bottom wall of the mounting hole.

[0011] Furthermore, two insertion holes are provided on the top wall of the housing, which are symmetrically distributed on both sides of the screw. A positioning rod is vertically slidably inserted into the insertion hole, and the insertion hole is parallel to the screw. An elastic element is installed between the positioning rod and the insertion hole.

[0012] Furthermore, a groove is provided at the end of the positioning rod, and a suction cup is fixedly installed in the groove. The ratio of the diameter of the groove to the diameter of the suction cup is 1.2-1.4; and the ratio of the height of the suction cup to the height of the groove is 1.1-1.2.

[0013] Furthermore, the elastic element is an elastic bellows, and a conduit extending from the bottom end into the cavity is inserted into the side wall of the elastic bellows.

[0014] Furthermore, there are two slides, each equipped with a slider, a locking rod, and an adjustment mechanism. The two slides are parallel to each other. A bidirectional threaded rod passes through the housing, and a circular scale is fixedly installed on the side wall of the housing, with the scale fitted over the outside of the bidirectional threaded rod.

[0015] Furthermore, a connector made of elastic material is installed between the two parallel elastic pads.

[0016] Furthermore, a strip-shaped luminous level is horizontally fixed on the front wall of the housing.

[0017] S1. First, rotate the double-threaded rod according to the size of the float to be tested. Move the locking rod through the slider and adjust the distance between the two locking rods. At the same time, rotate the screw and adjust the length of the screw extending from the threaded hole. So that when the locking rod is in contact with the side wall of the float, when the mounting rod extends from the mounting hole, the screw can drive the probe body to be in contact with the float. S2. Hold the housing and make the two positioning rods symmetrically distributed on both sides of the probe body where it will be detected, and push the housing closer to the side wall of the float. At the same time, the elastic pad on the surface of the clamping rod is squeezed. S3. Air blows through the vent towards the surface of the housing. At the same time, the positioning rod is obstructed by the housing and retracts into the insertion hole. The elastic element pressurizes the cavity, increasing the impact force of the airflow discharged from the vent. S4. After the clamp rod is in contact with the float, pressure is applied to the friction pad, thereby driving the mounting rod to extend out of the mounting hole, so that the probe body is in contact with the side wall of the float, and the detection begins.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) This scheme adjusts the mechanism and the clamp rod to work together, and the clamp rod is completely attached to the outer wall of the float. By using the rigid connection of the clamp rod, the probe body and the float wall are finally stably pressed together. Then, the screw rod is rotated so that the screw rod extends out of the threaded hole. The screw rod drives the probe body to press tightly against the detection point that has been coated with coupling agent, ensuring stable acoustic coupling and guaranteeing detection accuracy.

[0019] (2) This scheme uses the air supply mechanism and the air hole to cooperate. The gas in the cavity is discharged through the air hole and impacts the surface of the float. This allows the dirt attached to the surface of the float to be impacted, keeping the part of the float surface that is about to contact the clamp rod clean and preventing the clamp rod from shaking during the detection process, thus improving the detection accuracy.

[0020] (3) This solution uses the mounting rod, mounting hole and driving mechanism to cooperate with each other. When the clamping rod is attached to the float and the shell is fixed, the driving mechanism drives the mounting rod to extend out of the mounting hole to the maximum extent, so that the probe body is attached to the outer wall of the float, which can prevent the probe body from being worn during the placement of the shell, thereby ensuring the accuracy of subsequent detection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the combined structure of the housing and the lever of the present invention; Figure 3 This is a cross-sectional view of the positioning rod and suction cup of the present invention; Figure 4 This is a schematic cross-sectional view of the combined structure of the housing and friction pad of the present invention; Figure 5 This is a schematic cross-sectional view of the combined structure of the housing, slider, and bidirectional threaded rod of the present invention; Figure 6 This is a schematic diagram of the combined structure of the housing and the positioning rod of the present invention; Figure 7 This is a top view of the housing structure of the present invention.

[0022] Explanation of the labels in the diagram: 1. Main unit; 2. Communication cable; 3. Housing; 4. Screw; 5. Probe body; 6. Mounting rod; 7. Slide groove; 8. Slider; 9. Clamping rod; 10. Cavity; 11. Air hole; 12. Elastic pad; 13. Bidirectional threaded rod; 14. Guide rod; 15. Pressurization chamber; 16. Air tube; 17. Elastic membrane; 18. Friction pad; 19. Cavity; 20. Connecting tube; 21. Positioning rod; 22. Elastic element; 23. Groove; 24. Suction cup; 25. Guide tube; 26. Ruler; 27. Connector. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] Example 1: Please see Figures 1 to 7 An explosion-proof detection probe for leakage of floating roof and floating box in a storage tank includes a host 1, a communication line 2 and a detection component. The two ends of the communication line 2 are electrically connected to the host 1 and the probe body 5 respectively, so that the data detected by the probe body 5 can be sent to the host 1. The detection assembly includes a housing 3, a screw 4, and a probe body 5; wherein, the probe body 5 is used to emit ultrasonic pulse waves, which is existing technology and will not be described in detail. The top wall of the housing 3 is provided with a mounting hole, and a mounting rod 6 is slidably installed in the mounting hole. The maximum extension of the mounting rod 6 from the mounting hole is a fixed value. A threaded hole is provided at the end of the mounting rod 6 away from the mounting hole. A screw 4 is threadedly installed in the threaded hole. The probe body 5 is fixedly installed at the end of the screw 4 away from the mounting hole. The housing 3 is provided with a drive mechanism to drive the mounting rod 6 to move. A groove 7 is provided on the top wall of the housing 3. Two sliders 8 are slidably installed in the groove 7. A locking rod 9 is fixedly installed at an angle on the top wall of the sliders 8. An adjustment mechanism that cooperates with the sliders 8 is provided in the groove 7. A cavity 10 is provided on the clamp rod 9, and air holes 11 are evenly provided on the side wall of the cavity 10. An elastic pad 12 is fixedly installed on the side wall of the clamp rod 9. The elastic pad 12 is located between the air holes 11 and the housing 3, and the clamp rod 9 is provided with an air supply mechanism for supplying air to the cavity 10.

[0025] The adjustment mechanism includes a bidirectional threaded rod 13 rotatably mounted in the slide groove 7, and two sliders 8 symmetrically arranged on the bidirectional threaded rod 13. Both sliders 8 are threadedly connected to the bidirectional threaded rod 13. Therefore, when the bidirectional threaded rod 13 rotates, the two sliders 8 move closer or further away from each other simultaneously. A guide rod 14 is horizontally fixedly installed in the slide groove 7, passing through the sliders 8, and the sliders 8 are slidably sleeved on the guide rod 14. Therefore, during the rotation of the bidirectional threaded rod 13, the sliders 8 are prevented from rotating synchronously, so that the sliders 8 can only move along the slide groove 7. The thread helix angle (α) of the bidirectional threaded rod 13 is less than or equal to the equivalent friction angle (ρ'), thereby achieving self-locking. When the sliders 8 are subjected to thrust, the bidirectional threaded rod 13 can be prevented from rotating. This is existing technology and will not be described in detail here.

[0026] When it is necessary to test the sealing performance of the floating roof, firstly, apply a sufficient amount of coupling agent evenly to the test area on the outer wall of the floating roof, and adjust the length of the screw 4 extending from the threaded hole according to the size of the floating roof to be tested.

[0027] Then, rotate the double-threaded rod 13 to drive the sliders 8 on both sides to move, so that the locking rod 9 installed at the front end of the slider 8 opens.

[0028] Continue rotating the bidirectional threaded rod 13. During this process, the elastic pad 12 is gradually compressed and remains in contact with the side wall of the float. At the same time, the air supply mechanism provides gas to the cavity 10. The gas in the cavity 10 is then discharged through the air hole 11 and impacts the surface of the float. This impacts the dirt adhering to the surface of the float, keeping the part of the float surface that is about to contact the clamp rod 9 clean and preventing the clamp rod 9 from shaking during the detection process. This improves the detection accuracy.

[0029] Until the clamp rod 9 is completely in contact with the outer wall of the float, the rigid connection of the clamp rod 9 is used to finally achieve stable pressing between the probe body 5 and the float wall. Then, the installation rod 6 is moved by the drive mechanism, and at the same time, the screw 4 drives the probe body 5 to press tightly against the detection point that has been coated with coupling agent, so as to ensure stable acoustic coupling.

[0030] Then the probe body 5 starts working.

[0031] After the probe body 5 emits an ultrasonic pulse wave (5MHz-10MHz), the ultrasonic wave passes through the "delay block" and coupling agent, and is vertically incident → into the interior of the "float outer wall (aluminum or 304 stainless steel, 1-3mm thick)". The ultrasonic wave is reflected by the float inner wall → float outer wall → float inner wall → float outer wall → ... Each time the ultrasonic wave reflects off the "outer wall of the float" and is transmitted back to the probe body 5, its amplitude continuously decreases. The rate of decrease is closely related to the state of the "inner wall of the float". If there is liquid residue on the inner wall of the float directly opposite the probe body 5, the reflectivity of the inner wall to ultrasound will decrease significantly (taking an aluminum float as an example, following the principle of ultrasound reflection and transmission at the aluminum-water interface). After N rounds of reflection and multiplication, the amplitude of the echo returning to the probe body 5 on the Nth transmission will decrease significantly. If there is no liquid residue (equivalent to air) on the inner wall of the float directly opposite the probe body 5, the reflectivity of the inner wall to ultrasound will increase significantly (taking aluminum float as an example, following the principle of ultrasound reflection and transmission at the aluminum-air interface). After N rounds of reflection and multiplication, the echo amplitude of the Nth transmission returning to the probe body 5 will decrease slightly. The reflectivity of ultrasound at interfaces with different acoustic impedances is calculated as follows: r = (Z2 - Z1) / (Z2 + Z1) Where: Z1 is the acoustic impedance of the first medium, i.e., the aluminum plate or 304 plate in this case; Z2 is the acoustic impedance of the second medium, i.e., the leaking liquid or air in this case; Relative values ​​of acoustic impedance: Aluminum = 1.69, Steel (equivalent to 304 sheet) = 4.53, Water (equivalent to liquid residue) = 0.15, Air = 0.00004.

[0032] like Figure 2 As shown, the air supply mechanism includes an installation groove on the side wall of the lever 9, an elastic pad 12 is installed in the installation groove, and a pressurization chamber 15 is provided on the elastic pad 12. An air pipe 16 extending into the cavity 10 is inserted into the side wall of the pressurization chamber 15.

[0033] Since the elastic pad 12 is set on the surface of the lever 9 and protrudes from the mounting groove, the elastic pad 12 first fits against the side wall of the float. As the lever 9 approaches the side wall of the float, the elastic pad 12 is gradually squeezed. At this time, the gas in the pressurization chamber 15 is discharged into the cavity 10 through the air pipe 16, thereby supplying air to the cavity 10.

[0034] Meanwhile, the elastic pad 12 always remains in contact with the side wall of the float. Under the action of the elastic pad 12, when the airflow discharged from the air hole 11 impacts the side wall of the float, it can prevent the airflow from impacting the coupling agent at the contact part of the probe body 5, thus ensuring that the probe body 5 can work normally.

[0035] like Figure 4 As shown, the drive mechanism includes an elastic membrane 17 fixedly installed in the mounting hole, the bottom end of the mounting rod 6 is fixedly connected to the elastic membrane 17, a friction pad 18 of elastic material is fixedly installed on the side wall of the housing 3, a cavity 19 is opened on the friction pad 18, and a connecting tube 20 extending into the cavity 19 is inserted into the bottom wall of the mounting hole.

[0036] After the clamping rod 9 is attached to the float and the housing 3 is fixed, the operator applies pressure to the friction pad 18 with their fingers. At this time, the gas in the cavity 19 flows into the space below the elastic membrane 17 in the mounting hole along the connecting pipe 20. The elastic membrane 17 expands and drives the mounting rod 6 to extend out of the mounting hole to the maximum extent, so that the probe body 5 is attached to the outer wall of the float. This prevents the probe body 5 from being worn during the placement of the housing 3, thereby ensuring the accuracy of subsequent testing.

[0037] Furthermore, the rough surface of the friction pad 18 can prevent the housing 3 from falling when held in the hand.

[0038] like Figure 7 As shown, two insertion holes are provided on the top wall of the housing 3. The two insertion holes are symmetrically distributed on both sides of the screw 4. A positioning rod 21 is vertically slidably inserted into the insertion hole, and the insertion hole is parallel to the screw 4. An elastic element 22 is installed between the positioning rod 21 and the insertion hole.

[0039] When the positioning rod 21 is not subjected to external force, under the action of the elastic element 22, the positioning rod 21 is in the state of extending out of the insertion hole.

[0040] When changing the detection location: First, move the housing 3 to the area to be tested, so that the ends of the two positioning rods 21 are in contact with the surface of the float, while ensuring that the specific part to be tested is located in the middle of the line connecting the ends of the two positioning rods 21. Then, the housing 3 is pushed towards the float. Under pressure, the positioning rod 21 retracts into the insertion hole, overcoming the elastic force of the elastic element 22, until the locking rod 9 is stably attached to the surface of the float. At this time, the probe body 5 is also attached to the surface of the float, and the ends of the two positioning rods 21 are pressed tightly against the surface of the float under the elastic force of the elastic element 22. This two-point contact quickly determines the centerline of the detection area, effectively reducing the number of times the housing 3 needs to be repeatedly adjusted to find the precise detection point, thus improving work efficiency.

[0041] like Figure 3 As shown, the end of the positioning rod 21 is provided with a groove 23, and a suction cup 24 is fixedly installed in the groove 23. The ratio of the diameter of the groove 23 to the diameter of the suction cup 24 is 1.2-1.4; and the ratio of the height of the suction cup 24 to the height of the groove 23 is 1.1-1.2. Therefore, when the positioning rod 21 comes into contact with the float, the suction cup 24 will adhere to the surface of the float, thereby preventing the positioning rod 21 from shaking. During the process of the housing 3 approaching the float, it plays a role in preventing the probe body 5 from wearing.

[0042] like Figure 5 , Figure 6 As shown, the elastic element 22 is an elastic bellows, and a conduit 25 extending from the bottom end into the cavity 10 is inserted into the side wall of the elastic bellows.

[0043] During the process of the positioning rod 21 retracting into the insertion hole, the elastic bellows is gradually squeezed. At this time, the gas in the elastic bellows flows into the cavity 10 through the conduit 25, increasing the air pressure in the cavity 10. Thus, when the air is vented from the vent 11, it increases the impact force of the airflow discharged from the vent 11.

[0044] like Figure 5 As shown, there are two slides 7, each equipped with a slider 8, a locking rod 9 and an adjustment mechanism. The two slides 7 are parallel to each other. The bidirectional threaded rod 13 passes through the housing 3, and a circular scale 26 is fixedly installed on the side wall of the housing 3. The scale 26 is fitted on the outside of the bidirectional threaded rod 13, so that the rotation angle of each bidirectional threaded rod 13 can be intuitively understood, which plays the role of ensuring that the two bidirectional threaded rods 13 can rotate at the same angle. When the test is completed, rotate the bidirectional threaded rod 13 to bring the two sliders 8 on the same bidirectional threaded rod 13 closer to each other until the sliders 8 drive the corresponding locking rods 9 to surround the probe body 5, thereby preventing the probe body 5 from being bumped and protecting the probe body 5.

[0045] like Figure 2 As shown, a connector 27 is installed between two parallel elastic pads 12. The connector 27 is made of elastic material.

[0046] Therefore, when the elastic pad 12 is squeezed, the elastic material connector 27 also fits tightly with the float. That is, by setting the elastic material connector 27, the airflow discharged from the air hole 11 can be isolated from the part to be contacted by the probe body 5, which plays the role of ensuring that the coupling agent can remain in the part to be detected.

[0047] like Figure 2 As shown, a strip-shaped luminous level is horizontally fixed on the front wall of the housing 3. By observing the state of the luminous level, it can be determined whether the probe body 5 is aligned, which ensures that the electromagnetic waves emitted by the probe body 5 can be emitted vertically. The luminous level is existing technology and will not be described in detail.

[0048] The present invention also provides a method for using a leak-proof and explosion-proof detection probe for the floating roof and pontoon inside the above-mentioned storage tank, comprising the following steps: S1. First, rotate the bidirectional threaded rod 13 according to the size of the float to be tested. Move the locking rod 9 through the slider 8 and adjust the distance between the two locking rods 9. At the same time, rotate the screw 4 and adjust the length of the screw 4 extending from the threaded hole. So that when the locking rod 9 is in contact with the side wall of the float, when the mounting rod 6 extends from the mounting hole, the screw 4 can drive the probe body 5 to be in contact with the float. S2. Hold the housing 3 and make the two positioning rods 21 symmetrically distributed on both sides of the probe body 5 where it is about to be detected, and push the housing 3 gradually closer to the side wall of the float. At the same time, the elastic pad 12 on the surface of the clamping rod 9 is squeezed. S3, the air hole 11 blows air toward the surface of the housing 3, while the positioning rod 21 is obstructed by the housing 3 and retracts into the insertion hole, and the elastic element 22 pressurizes the cavity 10, increasing the impact force of the airflow discharged from the air hole 11. S4. After the clamp rod 9 is in contact with the float, pressure is applied to the friction pad 18, thereby driving the mounting rod 6 to extend out of the mounting hole, so that the probe body 5 is in contact with the side wall of the float, and the detection begins.

[0049] Instructions for use: When it is necessary to test the sealing performance of the floating roof, first, apply a sufficient amount of coupling agent evenly to the test area on the outer wall of the floating roof, and adjust the length of the screw 4 extending from the threaded hole according to the size of the floating roof to be tested.

[0050] Then, rotate the double-threaded rod 13 to drive the sliders 8 on both sides to move, so that the locking rod 9 installed at the front end of the slider 8 opens.

[0051] Continue rotating the bidirectional threaded rod 13. During this process, the elastic pad 12 is gradually compressed and remains in contact with the side wall of the float. At the same time, the air supply mechanism provides gas to the cavity 10. The gas in the cavity 10 is then discharged through the air hole 11 and impacts the surface of the float. This impacts the dirt adhering to the surface of the float, keeping the part of the float surface that is about to contact the clamp rod 9 clean and preventing the clamp rod 9 from shaking during the detection process. This improves the detection accuracy.

[0052] Until the clamp rod 9 is completely in contact with the outer wall of the float, the rigid connection of the clamp rod 9 is used to finally achieve stable pressing between the probe body 5 and the float wall. Then, the installation rod 6 is moved by the drive mechanism, and at the same time, the screw 4 drives the probe body 5 to press tightly against the detection point that has been coated with coupling agent, so as to ensure stable acoustic coupling.

[0053] Then the probe body 5 starts working.

[0054] After the probe body 5 emits an ultrasonic pulse wave (5MHz-10MHz), the ultrasonic wave passes through the "delay block" and coupling agent, and is vertically incident → into the interior of the "float outer wall (aluminum or 304 stainless steel, 1-3mm thick)". The ultrasonic wave is reflected by the float inner wall → float outer wall → float inner wall → float outer wall → ... Each time the ultrasonic wave reflects off the "outer wall of the float" and is transmitted back to the probe body 5, its amplitude continuously decreases. The rate of decrease is closely related to the state of the "inner wall of the float". If there is liquid residue on the inner wall of the float directly opposite the probe body 5, the reflectivity of the inner wall to ultrasound will decrease significantly (taking an aluminum float as an example, following the principle of ultrasound reflection and transmission at the aluminum-water interface). After N rounds of reflection and multiplication, the amplitude of the echo returning to the probe body 5 on the Nth transmission will decrease significantly. If there is no liquid residue (equivalent to air) on the inner wall of the float directly opposite the probe body 5, the reflectivity of the inner wall to ultrasound will increase significantly (taking aluminum float as an example, following the principle of ultrasound reflection and transmission at the aluminum-air interface). After N rounds of reflection and multiplication, the echo amplitude of the Nth transmission returning to the probe body 5 will decrease slightly. The reflectivity of ultrasound at interfaces with different acoustic impedances is calculated as follows: r = (Z2 - Z1) / (Z2 + Z1) Where: Z1 is the acoustic impedance of the first medium, i.e., the aluminum plate or 304 plate in this case; Z2 is the acoustic impedance of the second medium, i.e., the leaking liquid or air in this case; Relative values ​​of acoustic impedance: Aluminum = 1.69, Steel (equivalent to 304 sheet) = 4.53, Water (equivalent to liquid residue) = 0.15, Air = 0.00004.

[0055] Since the elastic pad 12 is set on the surface of the lever 9 and protrudes from the mounting groove, the elastic pad 12 first fits against the side wall of the float. As the lever 9 approaches the side wall of the float, the elastic pad 12 is gradually squeezed. At this time, the gas in the pressurization chamber 15 is discharged into the cavity 10 through the air pipe 16, thereby supplying air to the cavity 10.

[0056] Meanwhile, the elastic pad 12 always remains in contact with the side wall of the float. Under the action of the elastic pad 12, when the airflow discharged from the air hole 11 impacts the side wall of the float, it can prevent the airflow from impacting the coupling agent at the contact part of the probe body 5, thus ensuring that the probe body 5 can work normally.

[0057] When the positioning rod 21 is not subjected to external force, under the action of the elastic element 22, the positioning rod 21 is in the state of extending out of the insertion hole.

[0058] When changing the detection location: First, move the housing 3 to the area to be tested, so that the ends of the two positioning rods 21 are in contact with the surface of the float, while ensuring that the specific part to be tested is located in the middle of the line connecting the ends of the two positioning rods 21. Then, the housing 3 is pushed towards the float. Under pressure, the positioning rod 21 retracts into the insertion hole, overcoming the elastic force of the elastic element 22, until the locking rod 9 is stably attached to the surface of the float. At this time, the probe body 5 is also attached to the surface of the float, and the ends of the two positioning rods 21 are pressed tightly against the surface of the float under the pressure of the elastic element 22. The center line of the detection area is quickly determined through two-point contact, which effectively reduces the number of times the position of the housing 3 needs to be repeatedly adjusted to find the accurate detection point, thus improving work efficiency.

[0059] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A leak-proof explosion-proof detection probe for floating roofs and pontoons in storage tanks, comprising a main unit (1), a communication line (2), and detection components; Its features are: The detection assembly includes a housing (3), a screw (4), and a probe body (5); The top wall of the housing (3) is provided with an installation hole, and an installation rod (6) is slidably installed in the installation hole; a threaded hole is provided at the end of the installation rod (6) away from the installation hole, the screw (4) is threaded in the threaded hole, and the probe body (5) is fixedly installed at the end of the screw (4) away from the installation hole, and the housing (3) is provided with a drive mechanism for driving the installation rod (6) to move. The top wall of the housing (3) is provided with a sliding groove (7), and two sliders (8) are slidably installed in the sliding groove (7). A locking rod (9) is fixedly installed on the top wall of the slider (8) at an angle, and an adjustment mechanism that cooperates with the slider (8) is provided in the sliding groove (7). A cavity (10) is provided on the clamp (9), and air holes (11) are evenly provided on the side wall of the cavity (10). An elastic pad (12) is fixedly installed on the side wall of the clamp (9). The elastic pad (12) is located between the air hole (11) and the shell (3). The clamp (9) is provided with an air supply mechanism for supplying air to the cavity (10).

2. The explosion-proof detection probe for leakage of floating roof / floor box in a storage tank according to claim 1, characterized in that: The adjustment mechanism includes a bidirectional threaded rod (13) rotatably installed in the slide groove (7), two sliders (8) are symmetrically arranged on the bidirectional threaded rod (13), both sliders (8) are threadedly connected to the bidirectional threaded rod (13), and a guide rod (14) that passes through the slider (8) is horizontally fixedly installed in the slide groove (7).

3. The explosion-proof detection probe for leakage of floating roof / floor box in a storage tank according to claim 2, characterized in that: The gas supply mechanism includes an installation groove on the side wall of the lever (9), the elastic pad (12) is installed in the installation groove, and a pressurization chamber (15) is provided on the elastic pad (12). An air pipe (16) extending into the cavity (10) is inserted on the side wall of the pressurization chamber (15).

4. The explosion-proof detection probe for leakage of floating roof / floor box in a storage tank according to claim 3, characterized in that: The driving mechanism includes an elastic membrane (17) fixedly installed in the mounting hole. The bottom end of the mounting rod (6) is fixedly connected to the elastic membrane (17). An elastic friction pad (18) is fixedly installed on the side wall of the housing (3). A cavity (19) is opened on the friction pad (18). A connecting tube (20) extending into the cavity (19) is inserted into the bottom wall of the mounting hole.

5. The explosion-proof detection probe for leakage of floating roof / floor box in a storage tank according to claim 4, characterized in that: Two insertion holes are provided on the top wall of the housing (3). The two insertion holes are symmetrically distributed on both sides of the screw (4). A positioning rod (21) is vertically slidably inserted into the insertion hole, and the insertion hole is parallel to the screw (4). An elastic element (22) is installed between the positioning rod (21) and the insertion hole.

6. The explosion-proof detection probe for leakage of floating roof / floor box in a storage tank according to claim 5, characterized in that: The end of the positioning rod (21) is provided with a groove (23), and a suction cup (24) is fixedly installed in the groove (23). The ratio of the diameter of the groove (23) to the diameter of the suction cup (24) is 1.2-1.4; and the ratio of the height of the suction cup (24) to the height of the groove (23) is 1.1-1.

2.

7. The explosion-proof detection probe for leakage of floating roof / floor box in a storage tank according to claim 6, characterized in that: The elastic element (22) is an elastic bellows, and a conduit (25) with its bottom end extending into the cavity (10) is inserted into the side wall of the elastic bellows.

8. The explosion-proof detection probe for leakage of floating roof / floor box in a storage tank according to claim 2, characterized in that: There are two slides (7), each of which is equipped with a slider (8), a locking rod (9) and an adjustment mechanism. The two slides (7) are parallel to each other. The bidirectional threaded rod (13) passes through the housing (3), and a circular scale (26) is fixedly installed on the side wall of the housing (3). The scale (26) is sleeved on the outside of the bidirectional threaded rod (13).

9. The explosion-proof detection probe for leakage of floating roof / floor box in a storage tank according to claim 8, characterized in that: A connector (27) is installed between the two elastic pads (12) in a parallel state. The connector (27) is made of elastic material.

10. A method for using a leak-proof and explosion-proof detection probe for a floating roof or pontoon in a storage tank as described in any one of claims 1-9, characterized in that: Includes the following steps: S1. First, rotate the double-threaded rod (13) according to the size of the float to be tested. Move the locking rod (9) through the slider (8) and adjust the distance between the two locking rods (9). At the same time, rotate the screw (4) and adjust the length of the screw (4) extending from the threaded hole. So that when the locking rod (9) is in contact with the side wall of the float, when the mounting rod (6) extends from the mounting hole, the screw (4) can drive the probe body (5) to be in contact with the float. S2. Hold the housing (3) and make the two positioning rods (21) symmetrically distributed on both sides of the probe body (5) where it is about to be detected, and push the housing (3) closer to the side wall of the float. At the same time, the elastic pad (12) on the surface of the clamping rod (9) is squeezed. S3, the air hole (11) blows air toward the surface of the housing (3), while the positioning rod (21) is obstructed by the housing (3) and retracts into the insertion hole, and the elastic element (22) pressurizes the cavity (10) to increase the impact force of the airflow discharged from the air hole (11); S4. After the clamp rod (9) is in contact with the float, pressure is applied to the friction pad (18), thereby driving the mounting rod (6) to extend out of the mounting hole, so that the probe body (5) is in contact with the side wall of the float, and the detection begins.

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