Harmful gas detection device
Through the dynamic detection system of internal and external dual probes and the optimized sealing structure, the problem of loosening and leakage of the gas detection device at the elbow is solved, and all-round detection of the inside and outside of the elbow is achieved, which improves the accuracy and safety of gas detection and prevents corrosion and leakage.
Patent Information
- Application Number
- CN202511278802.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-09
- Publication Date
- 2025-10-10
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing gas detection devices are prone to loosening and leakage at elbows, and cannot fully reflect the concentration of mixed gases. In particular, heavy gases deposited on the inside of the elbows are easily ignored, resulting in a high risk of corrosion and leakage.
A dynamic detection system with internal and external dual probes is adopted. A swingable second probe and an adjustable disturbance mechanism are set on the inside, and a first probe with a linkage mechanism is set on the outside. Combined with an optimized sealing structure, all-round detection of the inside and outside of the elbow is achieved, and the formation of vortexes is suppressed by mechanical swing to interfere with the airflow.
It improves the accuracy and safety of gas detection, prevents corrosion and leakage in elbows, extends the service life of pipelines, and ensures early warning and rapid disposal.
Smart Images
Figure CN120760071A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of gas detection technology, and in particular to a harmful gas detection device. BACKGROUND
[0002] A gas detector is an instrument for detecting the concentration of a gas. The instrument is suitable for dangerous places where flammable or toxic gases exist, and can continuously detect the content of the measured gas in the air within the lower explosive limit for a long time. It can be widely used in various industries such as gas, petrochemical industry, metallurgy, steel, coking, and power industry where flammable or toxic gases exist, and is an ideal monitoring instrument for ensuring property and personal safety.
[0003] When H2S is transported by pipeline, the gas concentration at the elbow may indeed be locally increased due to hydrodynamic effects. When the gas flow passes through the elbow, a low-pressure vortex zone is formed on the inside (concave surface), causing H2S (density > air) to deposit and accumulate here. CFD simulation shows that the H2S concentration on the inside of the elbow can be 20%-50% higher than that in the straight pipe section; the flow rate on the outside (convex surface) of the elbow increases, while the flow rate on the inside decreases, causing H2S to stay longer in the low-speed zone, accumulate in concentration, and further accelerate the corrosion of the elbow. Therefore, it is necessary to detect the gas concentration at the elbow. Currently, a gas detector is directly fixed at the elbow by screwing it together, but the elbow is subjected to strong fluid impact and vibration, the threaded / flanged interface is prone to loosening, and high-pressure gas is prone to leakage. API statistics show that 23% of pipeline leakage accidents occur at the sealing failure of the elbow detection point. At the same time, when hydrogen sulfide gas and other gases are mixed and transported through the pipeline, density stratification occurs under the action of centrifugal force. For example, heavy gases (such as CO2 and H2S) are thrown to the outside of the elbow due to centrifugal force, and light gases (such as CH4 and H2) are concentrated on the inside. A single-point detector cannot fully reflect the concentration of mixed gases, especially the heavy gas deposited at the bottom of the elbow, which is easily ignored. Therefore, a harmful gas detection device is proposed to solve the above problems. SUMMARY
[0004] The purpose of the present application is to provide a harmful gas detection device to solve the problems in the background art.
[0005] To achieve the above purpose, the technical solution adopted by the present application is as follows: The utility model provides a kind of harmful gas detection device, including probe main body and first probe, the mainboard inside the probe main body is fixedly connected with first probe and second probe by transmission line, the bottom end of the probe main body is screw-connected with sealing mechanism, the inside of the first sealing plate is equipped with mounting hole, the bottom end of the sealing mechanism is connected with straight pipe, the other end of the straight pipe is fixedly connected with elbow pipe, and second probe is arranged in the inside of elbow pipe, the inside of the elbow pipe includes convex surface and concave surface, one end of the sealing mechanism is fixedly connected with adjusting disturbance mechanism, and adjusting disturbance mechanism is fixedly connected with second probe, one end of the adjusting disturbance mechanism is fixedly connected with linkage mechanism, and linkage mechanism is fixedly connected with first probe.
[0006] Preferably, the adjusting disturbance mechanism includes a first connecting pipe fixedly connected with the first sealing plate through the mounting hole, the other end of the first connecting pipe is fixedly connected with a second connecting pipe, the top end of the second connecting pipe is rotatably connected with a guide frame, the bottom end of the guide frame is provided with a longitudinal swing component, and the longitudinal swing component is fixedly connected with the second probe, the bottom end of the first connecting pipe is fixedly connected with a fixed plate, the inside of the fixed plate is rotatably connected with a reciprocating screw, one end of the reciprocating screw is fixedly connected with a wind wheel, the outside of the reciprocating screw is rotatably connected with a sliding block, and one end of the sliding block is fixedly connected with the linkage mechanism, the other end of the sliding block is fixedly connected with a third connecting pipe, the other end of the third connecting pipe is rotatably connected with a push rod, the other end of the push rod is fixedly connected with an adjusting pin, and the adjusting pin is slidably connected with the guide frame.
[0007] Preferably, the longitudinal swing component includes a connecting plate fixedly connected with the guide frame, the inside of the connecting plate is rotatably connected with a first rotating shaft, the other end of the first rotating shaft is fixedly connected with a swing rod, and the end of the swing rod is fixedly connected with the second probe, the outside of the first rotating shaft is provided with a torsion spring, and the two ends of the torsion spring are respectively fixedly connected with the swing rod and the connecting plate.
[0008] Preferably, the top end of the guide frame and the swing rod is fixedly connected with a spoiler.
[0009] Preferably, the linkage mechanism includes a pull rope fixedly connected with the sliding block, the other end of the pull rope is fixedly connected with a second rotating shaft, a part of the pull rope is wound on the outside of the second rotating shaft in a winding manner, one end of the pull rope is rotatably connected with a guide wheel, and the guide wheel is rotatably connected with the second connecting pipe, the top end of the second rotating shaft is fixedly connected with a horizontal plate, and the horizontal plate is fixedly connected with the first probe, the bottom end of the second rotating shaft is rotatably connected with a housing, and the housing is fixedly connected with the elbow pipe, the inside of the housing is provided with a clock spring, one end of the clock spring is fixedly connected with the housing, the other end of the clock spring is fixedly connected with the second rotating shaft, and the pre-tightening force direction of the clock spring is the same as the winding direction of the pull rope.
[0010] Preferably, the outer side of the pull rope is fixedly connected to a piston head, the outer side of the piston head is slidably connected to a piston cylinder, and the piston cylinder is fixedly connected to the first sealing plate, an auxiliary bag passes through the outer side of the pull rope, and the pull rope is fixedly connected to the movable end of the auxiliary bag, and the fixed end of the auxiliary bag is fixedly connected to the sealing mechanism.
[0011] Preferably, the sealing mechanism includes a first sealing plate slidingly connected to a second sealing plate, both ends of the first sealing plate are fixedly connected to a guide shaft, and the guide shaft is slidingly connected to the second sealing plate, the first sealing plate and the second sealing plate are fixedly connected to the surface of the contact surface with the inner wall of the straight tube with a sealing gasket, the inner side of the first sealing plate is slidingly connected to a third cylinder, a threading hole is provided on the inner side of one end of the third cylinder, the outer side of the third cylinder is slidingly connected to the second cylinder, the outer side of the second cylinder is spirally connected to the first cylinder, and the first cylinder is spirally connected to the bottom end of the detector body, and the outer side of the third cylinder is spirally connected to a nut.
[0012] Preferably, the first sealing plate and the second sealing plate are both arranged in an arc shape, and the curvature of the first sealing plate and the second sealing plate is the same as the curvature of the straight tube.
[0013] Preferably, both ends of the third cylinder are fixedly connected with a movable plate, the inner side of the movable plate is slidably connected with a guide column, and the guide column is fixedly connected to the first sealing plate.
[0014] Preferably, the top and bottom ends of the third cylinder are rotatably connected to guide rollers.
[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. A harmful gas detection device achieves comprehensive detection of key parts inside the elbow by arranging a swingable second probe and an adjustment disturbance mechanism on the inside of the elbow. Driven by the adjustment disturbance mechanism, the second probe can swing back and forth inside the elbow, covering three key detection positions: convex surface, concave surface and bottom, thereby increasing the detection range, effectively avoiding the error of single-point detection, ensuring timely detection of local gas concentration exceeding the standard, preventing accelerated corrosion of the elbow due to local gas enrichment, and extending the service life of the elbow; at the same time, the adjustment disturbance mechanism actively interferes with the gas flowing through the elbow through mechanical swing, significantly reducing the probability of vortex formation, and suppressing the generation of local high-concentration danger zones from the source, thereby comprehensively improving the accuracy of gas detection and the safety of pipeline operation.
[0016] 2. The harmful gas detection device, through the swingable first probe and the linkage mechanism, realizes the full-range dynamic detection of the outside of the elbow pipe, through the adjustment of the disturbance mechanism to drive the linkage mechanism, the first probe is reciprocatingly rotated and scanned on the outside of the elbow pipe, the detection coverage is greatly improved, and the leakage gas at any position of the elbow pipe can be captured in time, the detection efficiency of the dangerous gas is significantly improved, early warning and rapid disposal can be realized, the expansion of the gas leakage accident is effectively prevented, and the safe operation of the pipeline is ensured.
[0017] 3. The harmful gas detection device, through the sealing mechanism, the detection instrument main body and the straight pipe are double-sealed and connected, through the design, the connection point is arranged away from the surface of the elbow pipe, the influence of fluid impact vibration on the sealing performance is effectively reduced, the normal work of the second probe and the adjustment disturbance mechanism is ensured, the sealing mechanism not only improves the sealing strength and reliability of the connection part, but also facilitates the accurate introduction of the second probe and the adjustment disturbance mechanism into the inside of the elbow pipe through the mounting port of the straight pipe wall, avoids the failure of the traditional elbow pipe connection mode, and ensures the integrity and accuracy of the detection system.
[0018] In summary, the application innovatively adopts the design scheme of the combination of the internal and external double-probe dynamic detection system and the optimized sealing structure, through the arrangement of the swingable second probe and the adjustment disturbance mechanism in the inside of the elbow pipe, the comprehensive detection of the key positions of the convex surface, the concave surface and the bottom is realized, the reciprocating scanning of the first probe and the linkage mechanism on the outside of the elbow pipe forms a full-range monitoring network. The unique sealing mechanism arranges the connection point at the straight pipe position, which ensures the accurate introduction of the second probe and the adjustment mechanism into the inside of the elbow pipe through the straight pipe, and significantly improves the connection sealing property and vibration resistance. The design actively interferes with the airflow by mechanical swinging to suppress vortex formation, simultaneously realizes high-precision gas detection and pipeline protection, effectively prevents the corrosion caused by gas leakage and local enrichment, and greatly improves the safety and service life of the elbow pipe operation. BRIEF DESCRIPTION OF DRAWINGS
[0019] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.
[0020] Figure 1 It is a whole structure schematic view of the harmful gas detection device.
[0021] Figure 2 It is an installation structure schematic view of the second probe of the harmful gas detection device.
[0022] Figure 3 Figure is the installation structure diagram of the nut of the harmful gas detection device.
[0023] Figure 4 Figure is the installation structure diagram of the guide wheel of the harmful gas detection device.
[0024] Figure 5 Figure is the installation structure diagram of the swing rod of the harmful gas detection device.
[0025] Figure 6 Figure is the installation structure diagram of the torsion spring of the harmful gas detection device.
[0026] Figure 7 Figure is the installation structure diagram of the pull rope of the harmful gas detection device.
[0027] Figure 8 Figure is the installation structure diagram of the piston head of the harmful gas detection device.
[0028] Figure 9 Figure is the installation structure diagram of the Figure 8 of the harmful gas detection device.
[0029] Figure 10 Figure is the installation structure diagram of the clockwork spring of the harmful gas detection device.
[0030] Figure 11 Figure is the installation structure diagram of the guide column of the harmful gas detection device.
[0031] Figure 12 Figure is the installation structure diagram of the guide shaft of the harmful gas detection device.
[0032] In the figure: 1, adjusting disturbance mechanism; 101, first connecting pipe; 102, second connecting pipe; 103, fixed plate; 104, wind wheel; 105, reciprocating screw; 106, sliding block; 107, third connecting pipe; 108, push rod; 109, adjusting pin; 110, swing rod; 111, spoiler; 112, guide frame; 113, connecting plate; 114, first rotating shaft; 115, torsion spring; 2, linkage mechanism; 201, pull rope; 202, guide wheel; 203, piston cylinder; 204, piston head; 205, auxiliary bag; 206, second rotating shaft; 207, shell; 208, clockwork spring; 209, cross plate; 3. Sealing mechanism; 301. First cylinder; 302. Second cylinder; 303. Third cylinder; 304. Threading hole; 305. Nut; 306. First sealing plate; 307. Mounting hole; 308. Moving plate; 309. Guide post; 310. Second sealing plate; 311. Guide shaft; 312. Guide roller; 4. Detector body; 5. First probe; 6. Second probe; 7. Straight tube; 8. Bend tube; 801. Convex surface; 802. Concave surface. DETAILED DESCRIPTION
[0033] The present invention will be further described below in conjunction with specific embodiments. The accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual drawings. They should not be understood as limiting the present invention. In order to better illustrate the specific embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted. Based on the specific embodiments of the present invention, all other specific embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, in the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention. In addition, the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. The present invention will be further elaborated below in conjunction with specific embodiments.
[0035] Example
[0036] like Figures 1-12As shown, a harmful gas detection device includes a detector main body 4 and a first probe 5, and the main board inside the detector main body 4 is fixedly connected with the first probe 5 and a second probe 6 through a transmission line, a sealing mechanism 3 is spirally connected to the bottom end of the detector main body 4, the sealing mechanism 3 includes a first sealing plate 306, the inside of the first sealing plate 306 is provided with a mounting hole 307, the bottom end of the sealing mechanism 3 is connected with a straight pipe 7, the other end of the straight pipe 7 is fixedly connected with an elbow pipe 8, and the second probe 6 is arranged inside the elbow pipe 8, the inside of the elbow pipe 8 includes a convex surface 801 and a concave surface 802, when H2S is conveyed in a pipeline, the gas concentration at the elbow pipe 8 may be locally increased due to the hydrodynamic effect, when the airflow passes through the elbow pipe 8, the inside (the concave surface) forms a low-pressure vortex area, causing H2S (density > air) to deposit and enrich here, one end of the sealing mechanism 3 is fixedly connected with an adjusting disturbance mechanism 1, and the adjusting disturbance mechanism 1 is fixedly connected with the second probe 6, one end of the adjusting disturbance mechanism 1 is fixedly connected with a linkage mechanism 2, and the linkage mechanism 2 is fixedly connected with the first probe 5.
[0037] As a further improvement of the application, as Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6As shown, the adjusting disturbance mechanism 1 comprises a first connecting pipe 101 fixedly connected with the first sealing plate 306 through the mounting hole 307, the other end of the first connecting pipe 101 is fixedly connected with a second connecting pipe 102, the second connecting pipe 102 is designed in an arc shape matched with the elbow pipe 8, the radius of curvature of the second connecting pipe 102 is consistent with the curvature radius of the elbow pipe 8, so as to ensure that the two profiles are completely matched. The length of the second connecting pipe 102 is controlled to be not more than half of the arc length of the elbow pipe 8, so as to realize smooth insertion and positioning of the second connecting pipe 102 inside the elbow pipe 8. The first connecting pipe 101 and the second connecting pipe 102 are both designed in a hollow structure, and a through channel is reserved inside, which is used for penetrating the transmission line connected with the second probe 6, so as to realize mechanical linkage while ensuring the reliability of electrical connection. The top end of the second connecting pipe 102 is rotatably connected with a guide frame 112, the bottom end of the guide frame 112 is provided with a longitudinal swing assembly, and the longitudinal swing assembly is fixedly connected with the second probe 6. The bottom end of the first connecting pipe 101 is fixedly connected with a fixed plate 103, the inner side of the fixed plate 103 is rotatably connected with a reciprocating screw 105, one end of the reciprocating screw 105 is fixedly connected with a wind wheel 104, and the wind wheel 104 is designed in a horizontal shaft, and the rotation axis of the wind wheel 104 is arranged in parallel with the central axis of the straight pipe 7. When the gas containing H2S and the like is transported at high speed in the straight pipe 7 and flows through the wind wheel 104, the airflow drives the wind wheel 104 blade to generate a rotating torque, and then drives the reciprocating screw 105 fixedly connected with the wind wheel 104 to rotate synchronously, so as to realize the conversion of airflow energy to mechanical motion. The outer side of the reciprocating screw 105 is rotatably connected with a sliding block 106, one end of the sliding block 106 is fixedly connected with one end of the linkage mechanism 2, one end of the sliding block 106 is fixedly connected with a third connecting pipe 107, and the third connecting pipe 107 is designed in a hollow structure, and the inner diameter of the third connecting pipe 107 is greater than the maximum outer diameter of the reciprocating screw 105. The size configuration ensures that the third connecting pipe 107 can move axially along the reciprocating screw 105, and completely covers the outer edge of the reciprocating screw 105, so as to eliminate the risk of mechanical interference between the two in the relative motion process. The other end of the third connecting pipe 107 is rotatably connected with a push rod 108, the other end of the push rod 108 is fixedly connected with an adjusting pin 109, and the adjusting pin 109 is slidably connected with the guide frame 112.
[0038] As a further improvement of the application, as Figure 4 、 Figure 5 and Figure 6As shown, the longitudinal swing assembly includes a connecting plate 113 fixedly connected with the guide frame 112, the inner side of the connecting plate 113 is rotationally connected with a first rotating shaft 114, the other end of the first rotating shaft 114 is fixedly connected with a swing rod 110, and the distal end of the swing rod 110 is fixedly connected with the second probe 6; the swing rod 110 is hollowly arranged, and a transmission line connected with the second probe 6 can pass through the swing rod 110 to enter the inner side of the first connecting pipe 101, and the contact port of the transmission line and the first connecting pipe 101 is designed in a sealing manner to prevent gas from entering the inner side of the first connecting pipe 101; the outer side of the first rotating shaft 114 is provided with a torsional spring 115, and the two ends of the torsional spring 115 are fixedly connected with the swing rod 110 and the connecting plate 113 respectively; the torsional spring 115 is made of Inconel718 and is resistant to H2S corrosion, with a fatigue life > 10 6 , the torsional spring 115 provides a continuous upward restoring torque for the swing rod 110; when the adjusting pin 109 slides along the guide frame 112, it cooperates with the torsional spring 115 to drive the swing rod 110 to swing up and down with the first rotating shaft 114 as a fulcrum. This movement mechanism enables the swing rod 110 to drive the second probe 6 to extend downward to the bottom region inside the elbow pipe 8, realizing directional detection of the deposited gas. By covering the bottom, a traditional detection blind area, this design effectively solves the problem of missed detection caused by gas deposition, and improves the detection range to more than 95% of the full circumferential direction of the elbow pipe 8. This dynamic detection method not only eliminates the inherent error of single-point monitoring, but also can capture local concentration anomalies in real time, such as H2S concentration > 10 ppm, thereby preventing the electrochemical corrosion of the elbow pipe 8 caused by gas enrichment, significantly prolonging the service life of the pipeline.
[0039] As a further improvement of the present application, as Figure 5 shown, the top end of the guide frame 112 and the swing rod 110 are fixedly connected with a spoiler 111, the height of the spoiler 111 is 1-3 mm, and the spoiler 111 effectively destroys the steady vortex structure inside the elbow pipe 8 through periodic disturbance. When the linkage mechanism composed of the push rod 108, the adjusting pin 109, the guide frame 112 and the swing rod 110 drives the second probe 6 to reciprocate, the spoiler 111 produces forced shearing action on the airflow, significantly improving the gas turbulence intensity inside the elbow pipe 8. This active spoiler mechanism not only promotes the uniform mixing of the gas, reducing the local concentration gradient by more than 50%, but also eliminates the measurement error caused by airflow stratification in traditional detection.
[0040] As a further improvement of the present application, as Figure 1 , Figure 2 , Figure 3 , Figure 11 and Figure 12As shown, the sealing mechanism 3 comprises a first sealing plate 306 and a second sealing plate 310 connected in sliding mode, both ends of the first sealing plate 306 are fixedly connected with guide shafts 311, and the guide shafts 311 are connected with the second sealing plate 310 in sliding mode. When the first sealing plate 306 and the second sealing plate 310 are placed inside the straight pipe through the mounting port on the surface of the straight pipe 7, the first sealing plate 306 and the second sealing plate 310 need to be tightly adhered in advance. Through this adhered state, the overall size of the combination can be significantly reduced, ensuring that it can smoothly pass through the limited size mounting port of the straight pipe 7. This design not only ensures the installability of the sealing assembly, but also creates conditions for subsequent deployment and positioning inside the pipe. The surface of the contact surface between the first sealing plate 306 and the second sealing plate 310 and the inner wall of the straight pipe 7 is fixedly connected with a sealing gasket, the material of the sealing gasket is fluorine rubber FKM or perfluoro ether rubber FFKM, which ensures the corrosion resistance of the sealing gasket, such as H2S. The inner side of the first sealing plate 306 is connected with a third cylinder 303 in sliding mode, a threading hole 304 is formed in the inner side of one end of the third cylinder 303. The transmission line led out from the first connecting pipe 101 passes through the threading hole 304, the third cylinder 303 and the inner cavity of the first cylinder 301 in turn, and finally connects with the main board inside the probe main body 4 to complete the electrical connection. This threading path design ensures the reliable layout of the transmission line in the complex motion mechanism through multi-stage guide structure. The outer side of the third cylinder 303 is connected with a second cylinder 302 in sliding mode, the outer side of the second cylinder 302 is spirally connected with a first cylinder 301, and the first cylinder 301 is spirally connected with the bottom end of the probe main body 4. The outer side of the third cylinder 303 is spirally connected with a nut 305.
[0041] Both ends of the third cylinder 303 are fixedly connected to a movable plate 308, and the inner side of the movable plate 308 is slidably connected to a guide column 309, and the guide column 309 is fixedly connected to the first sealing plate 306. Under the mutual cooperation of the movable plate 308 and the guide column 309, the third cylinder 303 and the first sealing plate 306 can be moved relative to each other to ensure that the third cylinder 303 does not affect the first sealing plate 306 passing through the installation opening on the surface of the straight tube 7. When it is necessary to put the second probe 6, the adjustment disturbance mechanism 1, the first sealing plate 306 and the second sealing plate 310 and other components into the inner side of the curved pipe 8 and the straight pipe 7 through the installation opening on the surface of the straight pipe 7, first shrink the guide frame 112 and the rocker arm 110 toward the direction of the second connecting pipe 102 and gather them together. , reducing the overall space occupied by the guide frame 112 and the rocker arm 110, so that the guide frame 112, the rocker arm 110 and the second connecting pipe 102 that are shrunk and gathered together can pass through the installation opening on the surface of the straight pipe 7, and the diameter of the straight pipe 7 is larger than the sum of the lengths of the first connecting pipe 101, the second connecting pipe 102 and the first sealing plate 306, ensuring that the first connecting pipe 101, the second connecting pipe 102 and the first sealing plate 306 can be placed inside the straight pipe 7 and the curved pipe 8 through the installation opening on the surface of the straight pipe 7. At the same time, the sum of the lengths of the first connecting pipe 101, the second connecting pipe 102 and the first sealing plate 306 can be designed according to the diameter of the straight pipe 7. During placement, the detector body 4 is not first spirally connected to the first cylinder 301, and the adjustment The position of the joint nut 305 on the outside of the third cylinder 303 makes there enough space between the second cylinder 302 and the first sealing plate 306 to allow the first sealing plate 306 to be placed inside the mounting hole on the surface of the straight pipe 7. When placing, first extend the end of the second connecting pipe 102 into the mounting hole on the surface of the straight pipe 7. At the same time, the second connecting pipe 102 will also carry the guide frame 112, the rocker arm 110 and the second probe 6 into the mounting hole on the surface of the straight pipe 7. Before the first sealing plate 306 and the second sealing plate 310 are extended into the mounting hole on the surface of the straight pipe 7, first move the third cylinder 303 to a position close to the first sealing plate 306 away from the end of the piston cylinder 203, and then gradually extend the first sealing plate 306 and the second sealing plate 310 that are fitted together into the straight pipe 7. After the first sealing plate 306 and the second sealing plate 310 enter the installation opening on the surface of the straight tube 7, the second sealing plate 310 and the first sealing plate 306 are no longer in contact with each other, ensuring that the second sealing plate 310 and the first sealing plate 306 with the corresponding sealing gaskets can completely block the inner walls around the installation opening on the surface of the straight tube 7, ensuring the sealing between the second sealing plate 310, the first sealing plate 306 and the straight tube 7, and then move the third cylinder 303 so that the third cylinder 303 is in the middle position of the first sealing plate 306. Then the staff wraps the sealing raw tape around the thread on the outside of the second cylinder 302, and then screws the second cylinder 302 and the installation opening of the straight tube 7 together. Then the staff turns the nut 305,The third cylinder 303 is tightly attached to the inner wall of the straight pipe 7 through the moving plate 308 and the guide column 309 with the first sealing plate 306, the second sealing plate 310 and the sealing gasket, so that the first sealing plate 306, the second sealing plate 310 and the sealing gasket are fixed on the inner side of the straight pipe 7, and the adjusting disturbance mechanism 1 and the second probe 6 are also fixed on the inner side of the straight pipe 7 and the elbow pipe 8, then the sealing raw material belt is wound on the threaded outer side of the bottom of the detector main body 4, and then the bottom of the detector main body 4 is screw-connected with the first cylinder 301, then the staff fixes the shell 207 on the outer side of the elbow pipe 8 through welding, gluing or binding, so that the shell 207 cannot relatively shake with the elbow pipe 8.
[0042] As a further improvement of the present application, as shown in Figure 11 and Figure 12 , the first sealing plate 306 and the second sealing plate 310 are both arc-shaped, and the arc of the first sealing plate 306 and the second sealing plate 310 is the same as the arc of the straight pipe 7, so that the first sealing plate 306 and the second sealing plate 310 can be tightly attached to the inner wall of the straight pipe 7 through the sealing gasket.
[0043] As a further improvement of the present application, as shown in Figure 9 , the top end and the bottom end of the third cylinder 303 are both rotationally connected with the guide roller 312, the guide roller 312 plays a guiding role for the pull rope 201, reduces the friction between the pull rope 201 and the third cylinder 303, and facilitates the relative movement between the pull rope 201 and the third cylinder 303.
[0044] As a further improvement of the present application, as shown in Figure 7 , Figure 8 and Figure 10As shown, the linkage mechanism 2 includes a pull rope 201 fixedly connected to the slider 106, the other end of the pull rope 201 is fixedly connected to the second rotating shaft 206, and a part of the pull rope 201 is wound around the outside of the second rotating shaft 206, one end of the pull rope 201 is rotatably connected to the guide wheel 202, and the guide wheel 202 is rotatably connected to the second connecting tube 102, the pull rope 201 passes through the inner side of the third cylinder 303, and the pull rope 201 is on one side of the guide roller 312, the top of the second rotating shaft 206 is fixedly connected to the cross plate 209, and the cross plate 209 is connected to the second rotating shaft 206. The first probe 5 is fixedly connected, and the bottom end of the second rotating shaft 206 is rotatably connected to the shell 207, and the shell 207 is fixedly connected to the bent pipe 8. A spring 208 is provided on the inner side of the shell 207, and one end of the spring 208 is fixedly connected to the shell 207, and the other end of the spring 208 is fixedly connected to the second rotating shaft 206. The pre-tightening direction of the spring 208 is the same as the winding direction of the pull rope 201. When the slider 106 moves along the reciprocating screw 105 toward the direction close to the wind wheel 104, the slider 106 will gradually pull the pull rope 201. Then the pull rope 201 will rotate the second rotating shaft 206 through the pull rope 201 wound around the outside of the second rotating shaft 206, and then the second rotating shaft 206 will rotate around the vertical center line of the second rotating shaft 206 with the first probe 5 through the cross plate 209. When the slider 106 moves from one end of the reciprocating screw 105 to the other end, the first probe 5 just rotates 360 degrees around the vertical center line of the second rotating shaft 206. At this time, under the rotation of the second rotating shaft 206, the spring 208 will also be gradually tightened. When the slider 106 moves along the reciprocating screw 105, the spring 208 will be tightened gradually. When the lead screw 105 moves away from the wind wheel 104, the slider 106 will gradually release the pull rope 201. At this time, under the torsion of the spring 208, the second rotating shaft 206 brings the first probe 5 to reset through the cross plate 209, so that the first probe 5 can perform reciprocating rotation and scanning on the outside of the bend 8, greatly improving the detection coverage and ensuring that the leaked gas at any part of the bend can be captured in time. This design significantly improves the detection efficiency of hazardous gases, can achieve early warning and rapid disposal, effectively prevent the expansion of gas leakage accidents, and ensure the safety of pipeline operation.
[0045] As a further improvement of the present invention, Figure 8As shown, the outer side of the pull rope 201 is fixedly connected with a piston head 204, the outer side of the piston head 204 is slidably connected with a piston cylinder 203, and the piston cylinder 203 is fixedly connected with the first sealing plate 306. An annular groove is formed in the outer side of the piston head 204, and an O-shaped ring is embedded in the annular groove. The material of the O-shaped ring is fluororubber FKM or perfluoroether rubber FFKM, and the O-shaped ring is in interference fit with the inner wall of the piston cylinder 203 with an interference amount of 0.2-0.5mm, so as to ensure the sealing property between the piston head 204 and the piston cylinder 203. The O-shaped ring made of fluororubber FKM or perfluoroether rubber FFKM is resistant to corrosive gases such as H2S, and the friction coefficient μ is less than 0.1. The outer side of the pull rope 201 penetrates through an auxiliary bag 205, and the pull rope 201 is fixedly connected with the movable end of the auxiliary bag 205. The fixed end of the auxiliary bag 205 is fixedly connected with the sealing mechanism 3. The material of the auxiliary bag 205 is also fluororubber FKM or perfluoroether rubber FFKM, so that the auxiliary bag 205 can be compressed, thereby ensuring the normal pulling of the pull rope 201. When the pull rope 201 moves, the sealing property between the pull rope 201 and the first cylinder body 301 can also be ensured. Meanwhile, the auxiliary bag 205 also plays a role in balancing the air pressure inside the first cylinder body 301, so as to ensure the smooth movement of the piston head 204 in the piston cylinder 203.
[0046] In the present case, the components in contact with the gas can be sprayed with a corrosion-resistant nickel-based alloy coating or a ceramic metal composite coating, or made of a material resistant to H2S and other gas corrosion.
[0047] The above is the preferred embodiment of the present application. The basic principles and main features of the present application and the advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples. The above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the scope of the present application, various changes and improvements can be made to the present application. These changes and improvements fall within the scope of the present application. The scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A harmful gas detection device, comprising a detector body (4) and a first probe (5), characterized in that: The main board inside the detector body (4) is fixedly connected to the first probe (5) and the second probe (6) through a transmission line. The bottom end of the detector body (4) is spirally connected to a sealing mechanism (3). The sealing mechanism (3) includes a first sealing plate (306). The inner side of the first sealing plate (306) is provided with a mounting hole (307). The bottom end of the sealing mechanism (3) is connected to a straight pipe (7). The other end of the straight pipe (7) is fixedly connected to a curved pipe (8). The second probe (6) is arranged on the inner side of the curved pipe (8). The inner side of the curved pipe (8) includes a convex surface (801) and a concave surface (802). One end of the sealing mechanism (3) is fixedly connected to an adjusting disturbance mechanism (1), and the adjusting disturbance mechanism (1) is fixedly connected to the second probe (6). One end of the adjusting disturbance mechanism (1) is fixedly connected to a linkage mechanism (2), and the linkage mechanism (2) is fixedly connected to the first probe (5).
2. A harmful gas detection device according to claim 1, characterized in that: The regulating disturbance mechanism (1) comprises a first connecting tube (101) fixedly connected to a first sealing plate (306) through a mounting hole (307), the other end of the first connecting tube (101) is fixedly connected to a second connecting tube (102), the top end of the second connecting tube (102) is rotatably connected to a guide frame (112), the bottom end of the guide frame (112) is provided with a longitudinal swing component, and the longitudinal swing component is fixedly connected to the second probe (6), the bottom end of the first connecting tube (101) is fixedly connected to a fixed plate (103), the inner side of the fixed plate (103) is rotatably connected to the guide frame (112), A reciprocating screw (105) is connected, one end of the reciprocating screw (105) is fixedly connected to the wind wheel (104), the outer side of the reciprocating screw (105) is rotatably connected to a slider (106), and the slider (106) is fixedly connected to one end of the linkage mechanism (2), one end of the slider (106) is fixedly connected to a third connecting tube (107), the other end of the third connecting tube (107) is rotatably connected to a push rod (108), the other end of the push rod (108) is fixedly connected to an adjusting pin (109), and the adjusting pin (109) is slidably connected to the guide frame (112).
3. A harmful gas detection device according to claim 2, characterized in that: The longitudinal swing assembly includes a connecting plate (113) fixedly connected to the guide frame (112), the inner side of the connecting plate (113) is rotatably connected to a first rotating shaft (114), the other end of the first rotating shaft (114) is fixedly connected to a rocker (110), and the end of the rocker (110) is fixedly connected to the second probe (6), a torsion spring (115) is provided on the outer side of the first rotating shaft (114), and the two ends of the torsion spring (115) are respectively fixedly connected to the rocker (110) and the connecting plate (113).
4. A harmful gas detection device according to claim 3, characterized in that: The top ends of the guide frame (112) and the rocker arm (110) are both fixedly connected with a spoiler block (111).
5. The harmful gas detection device according to claim 1, characterized in that: The linkage mechanism (2) includes a pull rope (201) fixedly connected to the slider (106), the other end of the pull rope (201) is fixedly connected to the second rotating shaft (206), and a part of the pull rope (201) is wound around the outside of the second rotating shaft (206), one end of the pull rope (201) is rotatably connected to a guide wheel (202), and the guide wheel (202) is rotatably connected to the second connecting tube (102), the top end of the second rotating shaft (206) is fixedly connected to a horizontal plate (209), and the horizontal plate (209) is fixedly connected to the second rotating shaft (206). 09) is fixedly connected to the first probe (5), the bottom end of the second rotating shaft (206) is rotatably connected to the shell (207), and the shell (207) is fixedly connected to the bent pipe (8), a clockwork spring (208) is provided on the inner side of the shell (207), and one end of the clockwork spring (208) is fixedly connected to the shell (207), and the other end of the clockwork spring (208) is fixedly connected to the second rotating shaft (206), and the pre-tightening direction of the clockwork spring (208) is the same as the winding direction of the pull rope (201).
6. A harmful gas detection device according to claim 5, characterized in that: The outside of the drawstring (201) is fixedly connected to a piston head (204), the outside of the piston head (204) is slidably connected to a piston cylinder (203), and the piston cylinder (203) is fixedly connected to a first sealing plate (306). An auxiliary bag (205) passes through the outside of the drawstring (201), and the drawstring (201) is fixedly connected to the movable end of the auxiliary bag (205), and the fixed end of the auxiliary bag (205) is fixedly connected to the sealing mechanism (3).
7. The harmful gas detection device according to claim 1, characterized in that: The sealing mechanism (3) includes a second sealing plate (310) slidably connected to the first sealing plate (306), both ends of the first sealing plate (306) are fixedly connected to a guide shaft (311), and the guide shaft (311) is slidably connected to the second sealing plate (310), and the surfaces of the first sealing plate (306) and the second sealing plate (310) contacting the inner wall of the straight tube (7) are fixedly connected to a sealing gasket, the inner side of the first sealing plate (306) is slidably connected to a third cylinder (303), one end of the third cylinder (303) is provided with a threading hole (304) on the inner side, the outer side of the third cylinder (303) is slidably connected to the second cylinder (302), the outer side of the second cylinder (302) is spirally connected to the first cylinder (301), and the first cylinder (301) is spirally connected to the bottom end of the detector body (4), and the outer side of the third cylinder (303) is spirally connected to a nut (305).
8. A harmful gas detection device according to claim 7, characterized in that: The first sealing plate (306) and the second sealing plate (310) are both arranged in an arc shape, and the curvature of the first sealing plate (306) and the second sealing plate (310) is the same as the curvature of the straight tube (7).
9. The harmful gas detection device according to claim 7, characterized in that: Both ends of the third cylinder (303) are fixedly connected to a movable plate (308), the inner side of the movable plate (308) is slidably connected to a guide column (309), and the guide column (309) is fixedly connected to the first sealing plate (306).
10. The harmful gas detection device according to claim 7, characterized in that: The top and bottom ends of the third cylinder (303) are both rotatably connected to guide rollers (312).