Directional detection device based on gas leakage

Abstract

The invention relates to the technical field of fuel gas detection, and discloses a directional detection device based on fuel gas leakage, the directional detection device comprises a collection shell, a cover plate and a fuel gas detector, the cover plate and the fuel gas detector are detachably mounted on the top of the collection shell, a collection mechanism is arranged on the collection shell, and a driving assembly for driving the collection mechanism is arranged in the collection shell; and a gas collecting frame is fixedly connected into the collecting shell. According to the directional detection device based on fuel gas leakage, through the arrangement of the driving assembly, the multiple negative pressure collection cylinders can be synchronously driven, the multiple negative pressure collection cylinders are started to cooperate with the multiple pipeline pieces to collect gas at different positions where leakage is prone to occurring, and the directional output piece can be rotationally driven; the gas in different negative pressure collection cylinders can be detected by rotating the directional output piece during adjustment, one-way detection work of different gas leakage positions is formed, and independent detection work of a plurality of different positions is synchronously achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detection, and in particular to a directional detection device based on gas leakage. Background Art

[0002] Gas, a common energy source, is widely used in urban gas supply, industrial production, and household life. However, gas leakage has always been a major safety hazard in gas use. Gas leaks can not only cause accidents such as fires and explosions, but also pose a serious threat to human life and property. Therefore, timely and accurate detection of gas leaks is crucial to ensuring safe gas use.

[0003] Gas leak detection technology has made some progress. For example, Chinese invention patent publication number CN116296639B discloses a gas leak detection device. This device employs multiple gas sensors, each with a corresponding connecting hose placed directly at the gas pipeline connection. This allows for simultaneous detection of leaks in multiple locations, eliminating the tedious manual testing required. However, this detection device still has some drawbacks in practical use:

[0004] Limited detection accuracy: Because multiple groups of gas sensors are concentrated together and there is a lack of separate space between each sensor, when there is a gas leak in a certain area, the collected gas flow is non-directional, which can easily cause other sensors to be falsely triggered, making it impossible to accurately determine the specific leak location.

[0005] Inadequate safety: After detecting flammable gases, the device lacks a gas treatment process. When discharged, flammable gases can easily come into contact with the instrument's electrical connections, potentially causing sparks and explosions, resulting in low safety performance.

[0006] Single function: Most existing gas leak detection devices can only perform simple gas concentration detection, and cannot achieve separate detection and directional collection of different leakage locations, making it difficult to meet the gas leak detection needs in complex environments. Summary of the Invention

[0007] (1) Technical problems solved

[0008] In response to the shortcomings of the existing technology, the present invention provides a directional detection device based on gas leaks. By optimizing the design of the collection mechanism and drive components, it realizes the directional collection and separate detection of leakage-prone points at different locations. At the same time, the collected gas is adsorbed and separated, which effectively improves the detection accuracy and safety. It solves the problem that most existing gas leak detection devices can only perform simple gas concentration detection and cannot realize separate detection and directional collection of different leakage locations.

[0009] (2) Technical solution

[0010] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a directional detection device for gas leaks, comprising a gas collection shell, a cover plate detachably mounted on the top of the collection shell, and a gas detector; a collection mechanism is provided on the collection shell, and a drive assembly for driving the collection mechanism is provided inside the collection shell;

[0011] The interior of the collection shell is fixedly connected to a gas collection frame;

[0012] The collection mechanism includes a directional output component, a plurality of negative pressure collection cylinders, and a plurality of pipeline components connected to the negative pressure collection cylinders;

[0013] The detection end of the gas detector is detachably mounted on the gas output port of the directional output component, and the directional output component is used to collect the gas collected by one of the negative pressure collection tubes and output it to the detection end of the gas detector.

[0014] Preferably, a plurality of negative pressure collection tubes are fixed to the outer surface of the collection shell in an equidistant and surrounding manner, and the two ends of the negative pressure collection tubes are located inside and outside the collection shell;

[0015] The negative pressure collection tube is connected to the interior of the gas collecting frame through a drainage tube. The interior of the negative pressure collection tube is slidably connected to a piston plate. One end of the piston plate is fixedly connected to a drive shaft, and one end of the drive shaft extends to the outside of the negative pressure collection tube. The drive assembly is used to drive the drive shaft to reciprocate.

[0016] Preferably, a collection port is provided on the outside of the negative pressure collection tube, and a first one-way valve is installed on the collection port, and the pipeline is connected to the interior of the negative pressure collection tube through the collection port;

[0017] A through opening is provided inside the piston plate, and a one-way valve plate is provided inside the through opening.

[0018] Preferably, the pipeline component includes a collection tube, one end of which is detachably connected to the collection port of the negative pressure collection tube, the other end of which is provided with a collection nozzle, and a dust filter is provided inside the collection nozzle.

[0019] Preferably, a second one-way valve is provided at the other end of the outer surface of the collection nozzle, a row of branch ports are provided on the outer surface of the collection tube, and one-way valve plates are provided inside the branch ports.

[0020] Preferably, the directional output member comprises an annular plate arranged inside the gas collecting frame, the interior of the annular plate is fixedly connected with a collecting pipe and a collecting cover, and the collecting pipe is communicated with the interior of the collecting cover through a pipeline;

[0021] The driving assembly is used to make the collection cover move in an annular motion, and the gas inside the gas collection frame is collected by the collection cover moving in an annular motion;

[0022] The top of the collecting pipe extends to the top of the cover plate, and the detection end at the bottom of the gas detector is detachably mounted inside the collecting pipe.

[0023] Preferably, the inner side surface of the gas collecting frame is provided with a plurality of anastomotic openings, and the interior of the gas collecting frame is fixedly connected with a plurality of partition plates.

[0024] Preferably, an annular material frame is mounted on the top of the gas collecting frame, an air vent is provided at the bottom of the annular material frame, an adsorbent for adsorbing and separating combustible substances is stored inside the annular material frame, and a skirt is provided inside the cover plate for pressing the annular material frame.

[0025] (3) Beneficial effects

[0026] Compared with the prior art, the present invention provides a directional detection device based on gas leaks, which has the following beneficial effects:

[0027] Through the setting of the driving component, the present invention can not only drive several negative pressure collection tubes synchronously, and through the activation of several negative pressure collection tubes, cooperate with several pipeline parts to collect gas at different leakage-prone positions, but also can rotationally drive the directional output part. The directional output part during rotation adjustment can detect and process the gas inside different negative pressure collection tubes, forming a one-way detection work for different gas leakage positions. Not only does it not need to set up too many gas detection instruments, reducing the production cost of the detection device, but it also realizes the separate detection work of multiple different positions simultaneously, so as to timely understand the location of the gas leak.

[0028] The present invention drives the gear to rotate by rotating the shaft, and then drives several toothed discs to rotate. The rotation of the toothed disc can drive the convex rod to move in a circle along the axis of the toothed disc, and then the driving shaft in the negative pressure collection tube can be driven to telescopically move through the hinged rod, thereby forming a gas extraction operation. The convex rods on the several toothed discs are arranged in an increasing and alternating manner, so that when the gear drives the several toothed discs to rotate, the several toothed discs indirectly drive the several negative pressure collection tubes to perform negative pressure extraction, and the whole gas is collected in an increasing and alternating manner, so that the gas detector can monitor the newly injected gas inside the gas collection frame in real time through the directional output component, and has the functions of continuous detection and synchronous drive, forming the functions of real-time collection and real-time detection.

[0029] The present invention fixes an L-shaped rod and a rake frame on the collection pipe, so that when the directional output member is driven to rotate by the driving assembly, the two rake frames can be driven to rotate synchronously. Through the rotation of the two rake frames, the adsorbent inside the annular material frame can be disturbed, so that the adsorbent is fully in contact with the combustible material in the air, and the rotational driving force of the directional output member is effectively utilized, thereby improving the adsorption and separation effect of the combustible material and enhancing the problem of gas discharge after detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the pipeline component of the present invention;

[0032] Figure 3 This is a schematic diagram of the combination of the collection shell and the gas detector of the present invention;

[0033] Figure 4 This is a structural breakdown diagram of the acquisition shell and gas detector of the present invention;

[0034] Figure 5 A schematic cross-sectional view of a collection shell according to the present invention;

[0035] Figure 6 For the present invention Figure 5 A partial enlarged view of point A in the middle;

[0036] Figure 7 A cross-sectional top view of the collection shell of the present invention;

[0037] Figure 8 It is a structural schematic diagram of the drive assembly of the present invention;

[0038] Figure 9 This is a schematic diagram of the combination of the annular material frame and the directional output member of the present invention;

[0039] Figure 10 It is a structural schematic diagram of the directional output component of the present invention;

[0040] Figure 11 This is a schematic structural diagram of the annular material frame of the present invention;

[0041] Figure 12 It is a partial cross-sectional view of the gas collecting frame of the present invention.

[0042] In the figure: 1. Collection shell; 2. Cover plate;

[0043] 3. Gas collecting frame; 31. Anastomosis; 32. Separation plate; 33. Annular material frame; 34. L-shaped rod; 35. Rake frame; 36. Electric control valve;

[0044] 4. Directional output member; 41. Ring plate; 42. Collection tube; 43. Collection cover;

[0045] 5. Negative pressure collection tube; 51. Drainage tube; 52. Piston plate; 53. Drive shaft; 54. One-way valve plate;

[0046] 6. Pipeline parts; 61. Collection tube; 62. Collection nozzle; 63. Dust filter; 64. Branch port;

[0047] 7. Drive assembly; 71. Support platform; 72. Rotating shaft; 73. Gear; 74. Toothed disc; 75. Protruding rod; 76. Articulated rod; 77. Motor;

[0048] 8. Gas detector. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0050] Example 1:

[0051] Refer to the attached Figures 1-12 A directional detection device based on gas leakage includes a collection shell 1, a cover plate 2 detachably mounted on the top of the collection shell 1, and a gas detector 8. The collection shell 1 is provided with a collection mechanism, and the collection shell 1 is provided with a drive assembly 7 for driving the collection mechanism.

[0052] By setting the driving component 7, the collection mechanism can be driven, and the gas can be collected at different leak-prone locations through the collection mechanism, and the gas detector 8 can be used for separate detection.

[0053] The inside of the collection shell 1 is fixedly connected to a gas collection frame 3, and the inner side of the gas collection frame 3 is provided with an anastomotic opening 31;

[0054] The gas collecting frame 3 is provided to separately store the gas collected by several negative pressure collecting tubes 5;

[0055] The collection mechanism includes a directional output component 4, a plurality of negative pressure collection tubes 5, and a plurality of pipeline components 6 connected to the negative pressure collection tubes 5;

[0056] By setting the driving assembly 7, not only can several negative pressure collection tubes 5 be driven synchronously, and by starting several negative pressure collection tubes 5, several pipeline components 6 can be coordinated to collect gas at different leak-prone positions, but also the directional output component 4 can be driven to rotate. The directional output component 4 can detect and process the gas inside different negative pressure collection tubes 5 during rotation adjustment, forming a one-way detection work for different gas leakage positions. Not only does it not need to set up too many gas detection instruments, reducing the production cost of the detection device, but it also realizes the separate detection work of multiple different positions simultaneously, so that the location of the gas leak can be known in a timely manner.

[0057] The detection end of the gas detector 8 is detachably mounted on the gas output port of the directional output member 4. The directional output member 4 is used to collect the gas collected by one of the negative pressure collection tubes 5 and output it to the detection end of the gas detector 8.

[0058] The detection end of the gas detector 8 is detachably mounted on the gas outlet of the directional output component 4, so that the directional output component 4 can detect and process the gas inside the different negative pressure collection tubes 5 to form a gas leak detection function.

[0059] Refer to the attached Figure 8 and Figure 12 , a plurality of negative pressure collection tubes 5 are fixed to the outer surface of the collection shell 1 in an equidistant and surrounding manner, and the two ends of the negative pressure collection tube 5 are located inside and outside the collection shell 1; the negative pressure collection tube 5 is connected to the interior of the gas collection frame 3 through the drainage tube 51, and the interior of the negative pressure collection tube 5 is slidably connected to a piston plate 52, one end of the piston plate 52 is fixedly connected to a drive shaft 53, and one end of the drive shaft 53 extends to the outside of the negative pressure collection tube 5, and the drive assembly 7 is used to drive the drive shaft 53 to reciprocate;

[0060] The reciprocating stretching movement of the driving shaft 53 by the driving component 7 can drive the piston plate 52 to move back and forth, and the reciprocating movement of the piston plate 52 can perform air extraction through the pipeline component 6, and discharge the extracted gas into the gas collecting frame 3 through the drainage tube 51, and output the gas collected by the different negative pressure collection tubes 5 in a unidirectional manner through the directional output component 4, and cooperate with the gas detector 8 to perform unidirectional detection.

[0061] Refer to the attached Figure 3 and Figure 10-12 The outside of the negative pressure collection tube 5 is provided with a collection port, and a first one-way valve is installed on the collection port, and the pipeline 6 is connected with the inside of the negative pressure collection tube 5 through the collection port;

[0062] By installing a first one-way valve at the collection port, the collection port can be controlled in one direction to prevent the leakage of gas inside the negative pressure collection tube 5. The collection port is connected to the inside of the negative pressure collection tube 5 through the pipeline 6, so that when the negative pressure collection tube 5 is pumping gas, gas at other positions can be extracted through the pipeline 6.

[0063] A through opening is formed inside the piston plate 52, and a one-way valve plate 54 is provided inside the through opening;

[0064] By providing a through opening inside the piston plate 52 and a one-way valve plate 54 inside the through opening, the gas collected inside the negative pressure collection tube 5 can be squeezed when the piston plate 52 is reset, so that the gas inside the negative pressure collection tube 5 enters the other side of the piston plate 52 through the through opening. Then, by pulling the piston plate 52, the gas on the other side can be squeezed, so that the gas enters the gas collecting frame 3 through the drainage tube 51, forming the work to be detected.

[0065] Refer to the attached Figure 2 The pipeline 6 includes a collection tube 61, one end of which is detachably connected to the collection port of the negative pressure collection tube 5, and the other end of the collection tube 61 is provided with a collection nozzle 62, and a dust filter 63 is provided inside the collection nozzle 62;

[0066] The collection nozzle 62 of the collection pipe 61 is installed at a location where the gas pipeline is prone to leakage, such as the gas pipeline connection, the gas meter, the gas stove and the valve. The collection nozzle 62 is used to extract gas from time to time. The dust filter 63 is set to filter the extracted gas to prevent dust from entering, affecting the normal detection of gas leaks and contaminating the inside of the pipeline.

[0067] Refer to the attached Figure 2 , a second one-way valve is provided at the other end of the outer surface of the collection nozzle 62, and a row of branch ports 64 are provided on the outer surface of the collection tube 61, and a one-way valve sheet is provided inside the branch ports 64;

[0068] The second one-way valve is provided to facilitate one-way control of the position of the collection nozzle 62, thereby preventing the gas collected into the collection tube 61 from volatilizing, thereby causing the subsequent volatilization of combustible materials and affecting subsequent detection;

[0069] By arranging a row of branch ports 64 on the outer surface of the collection pipe 61, it is convenient to collect the gas on the laying route of the collection pipe 61, forming a multi-position collection operation. By arranging a one-way valve plate inside the branch port 64, it is convenient to control the branch port 64 in one direction, preventing the gas collected inside the collection pipe 61 from leaking out, thereby further improving the accuracy of its subsequent gas leak detection.

[0070] Refer to the attached Figure 9-10The directional output member 4 includes an annular plate 41 disposed inside the gas collecting frame 3. A collecting pipe 42 and a collecting cover 43 are fixedly connected to the inside of the annular plate 41. The collecting pipe 42 is connected to the inside of the collecting cover 43 through a pipeline.

[0071] The annular plate 41 is provided to seal and block the anastomotic opening 31 on the inner side of the gas collecting frame 3, preventing the gas inside the gas collecting frame 3 from being discharged through the anastomotic opening 31. When the collecting cover 43 moves to the position of the anastomotic opening 31, the gas inside the gas collecting frame 3 can directly enter the collecting cover 43 and the collecting pipe 42, and be detected by the gas detector 8.

[0072] The outer surface of the annular plate 41 is provided with a sealing sleeve, which is in close contact with the inner surface of the gas collecting frame 3 through the sealing sleeve;

[0073] The driving assembly 7 is used to make the collection cover 43 move in a circular motion, so as to collect the gas inside the gas collecting frame 3 through the collection cover 43 moving in a circular motion;

[0074] The annular plate 41 and the collecting cover 43 are rotated by the driving assembly 7, and the collecting cover 43 moves to different positions of the gas collecting frame 3, so that the gas at different positions of the gas collecting frame 3 can be collected, thereby facilitating the one-way detection work of the gas detector 8;

[0075] The top of the collecting pipe 42 extends to the top of the cover plate 2, and the detection end of the bottom of the gas detector 8 is detachably mounted inside the collecting pipe 42;

[0076] The detection end at the bottom of the gas detector 8 is detachably mounted inside the collecting tube 42, so that the detection end of the gas detector 8 can detect the gas inside the collecting tube 42, thereby forming a one-way detection operation.

[0077] The gas detector 8 can be installed inside the collecting pipe 42 by being sealed and inserted, and the gas detector 8 can be replaced with different types of gas detection instruments according to actual needs, with good disassembly and assembly functions.

[0078] Refer to the attached Figure 12 The inner side of the gas collecting frame 3 is provided with a plurality of anastomotic openings 31, and the interior of the gas collecting frame 3 is fixedly connected with a plurality of partition plates 32;

[0079] The partition plate 32 is provided to divide the internal space of the gas collecting frame 3 into multiple separate control areas, thereby facilitating the temporary storage of gas collected by several independent negative pressure collection tubes 5. The anastomosis 31 is provided to facilitate the directional output unit 4 to output and detect gas at different positions inside the gas collecting frame 3.

[0080] The number of anastomosis openings 31 and partition plates 32 is consistent with the number of negative pressure collection tubes 5, and the anastomosis openings 31 are located between the partition plates 32, so that the gas collected between the partition plates 32 can be transported to the directional output component 4 through the anastomosis openings 31, and cooperate with the gas detector 8 to form a directional detection operation.

[0081] Refer to the attached Figure 4-Figure 6 and Figure 9 , an annular material frame 33 is mounted on the top of the gas collecting frame 3, a vent is provided at the bottom of the annular material frame 33, and an adsorbent for adsorbing and separating combustible substances is stored inside the annular material frame 33;

[0082] By laying a layer of adsorbent inside the annular material frame 33, the adsorbent can be used to adsorb and separate the combustible substances in the gas, preventing the gas containing combustible substances from being directly discharged after the test is completed, which may easily come into contact with other electrical components of the instrument and cause spark explosion problems. The system has good gas treatment function and improves the safety performance of the detection equipment.

[0083] The adsorbent includes, but is not limited to, activated carbon, molecular sieve, and other materials for adsorbing combustible substances. When the adsorbent is saturated, the cover plate 2 and the annular material frame 33 can be disassembled and assembled to achieve the replacement of the adsorbent.

[0084] The inside of the cover plate 2 is provided with a skirt for pressing the annular material frame 33 tightly, so that when the cover plate 2 is screwed onto the top of the collection shell 1, the skirt just presses down on the annular material frame 33, thereby forming an indirect installation of the annular material frame 33.

[0085] Example 2: Based on Example 1, the difference is that;

[0086] Refer to the attached Figure 7 and Figure 8 The driving assembly 7 includes a support platform 71 fixed to the bottom of the collection shell 1. The top of the support platform 71 is rotatably connected to a rotating shaft 72. The outer surface of the rotating shaft 72 is fixedly connected to a gear 73. The top of the support platform 71 is rotatably connected to a plurality of toothed discs 74. The tops of the plurality of toothed discs 74 are rotatably connected to protruding rods 75. The outer surfaces of the plurality of protruding rods 75 are rotatably connected to hinged rods 76. One end of the plurality of hinged rods 76 is respectively hinged to one end of the plurality of driving shafts 53.

[0087] It should be noted here that the plurality of toothed discs 74 are all meshed with the outer surface of the gear 73 so that when the gear 73 rotates, the plurality of toothed discs 74 can be driven to rotate synchronously;

[0088] The rotating shaft 72 drives the gear 73 to rotate, which in turn drives the plurality of toothed discs 74 to rotate. The rotation of the toothed discs 74 drives the protruding rod 75 to move in a circular manner along the axis of the toothed discs 74, which in turn drives the driving shaft 53 in the negative pressure collection tube 5 to perform telescopic movement through the hinged rod 76, thereby performing gas extraction.

[0089] It should be noted here that Figure 7 and Figure 8 As shown, the protruding rods 75 on the plurality of toothed discs 74 are arranged in an increasing and alternating manner, so that when the gear 73 drives the plurality of toothed discs 74 to rotate, the plurality of toothed discs 74 indirectly drive the plurality of negative pressure collection tubes 5 to perform negative pressure extraction, and the overall gas collection is in an increasing and alternating manner, so that the gas detector 8 can monitor the newly injected gas inside the gas collection frame 3 in real time through the directional output member 4;

[0090] Specific operating principle: When the driving component 7 extracts gas from one of the negative pressure collection tubes 5 and discharges the extracted gas into the interior of the gas collection frame 3, the directional output component 4 is connected to the position of the gas collection frame 3 at this time, forming a real-time detection operation;

[0091] As the driving component 7 continues to drive, the other negative pressure collection tube 5 is evacuated and the evacuated gas is discharged into the interior of the gas collecting frame 3. The driving component 7 just drives the directional output component 4 to move to this position of the gas collecting frame 3, forming a continuous detection operation, with the function of synchronous driving, and forming the function of real-time collection and real-time detection.

[0092] The bottom of the support platform 71 is fixedly connected to a motor 77 for rotating the rotating shaft 72;

[0093] The motor 77 is connected to an external power source and a control switch. It is a forward and reverse rotating motor with adjustable speed. It is configured using the connection method and encoding method of the prior art to drive the rotating shaft 72 to rotate.

[0094] The outer surface of the collection shell 1 is provided with a plurality of gas outlets for facilitating the discharge of the detected gas. Through the gas outlets provided at these locations, the motor 77 can be cooled by the detected and processed gas, and the explosion problem caused by the presence of combustible substances in the gas can be prevented.

[0095] The top end of the rotating shaft 72 is detachably fixed to the annular plate 41;

[0096] By connecting the rotating shaft 72 to the annular plate 41, the rotation of the rotating shaft 72 in the driving assembly 7 can directly drive the annular plate 41 to rotate, thereby realizing gas collection work in different areas of the gas collecting frame 3, forming unidirectional detection work at different collection ends, and the rotating shaft 72 is connected to the annular plate 41 in a detachable manner, which facilitates subsequent users to disassemble and repair the device.

[0097] Example 3: Based on Example 1, the difference is that;

[0098] Refer to the attached Figure 5 、 Figure 6 、 Figure 9 and Figure 10 , the outer surface of the collecting pipe 42 is fixedly connected to two L-shaped rods 34, one end of the two L-shaped rods 34 is fixedly connected to a rake 35, and the two rakes 35 are used to disturb the adsorbent inside the annular material frame 33;

[0099] By fixing the L-shaped rod 34 and the rake 35 to the collection pipe 42, when the directional output member 4 is driven to rotate by the drive assembly 7, the two rakes 35 can be driven to rotate synchronously. The rotation of the two rakes 35 can disturb the adsorbent inside the annular material frame 33, so that the adsorbent is fully in contact with the combustible material in the air, effectively utilizing the rotational driving force of the directional output member 4, improving the adsorption and separation effect of the combustible material, and enhancing the problem of gas discharge after detection;

[0100] The interiors of the two rakes 35 and the two L-shaped rods 34 are both hollow, and the two rakes 35 are connected to the interior of the collection pipe 42 through the hollow L-shaped rods 34. The two L-shaped rods 34 are each provided with an electric control valve 36, and the two rakes 35 are each provided with an opening communicating with the interior thereof.

[0101] Since the interiors of the rake 35 and the L-shaped rod 34 are both hollow, the combustible gas thermally desorbed from the adsorbent can be directly discharged into the collection pipe 42 through the rake 35 and the L-shaped rod 34, thereby realizing rapid detection of the gas detector 8. This detection method not only allows simultaneous detection of gases at all collection locations, but also allows for concentration of combustible substances, thereby improving the accuracy of detection by the gas detector 8. This solves the problem that the combustible gas in the air is relatively low in combustible substances, so that even if the combustible gas flows, it is prone to volatilization, thereby affecting its detection accuracy.

[0102] A baffle driven by an electric cylinder is provided inside the collection cover 43. The baffle is used to block the opening of the collection cover 43. By starting the electric cylinder, the baffle can be driven to move. During the movement, the baffle can block or open the collection opening of the collection cover 43. By blocking the collection opening, when the driving component 7 is started, although the directional output member 4 can be driven to rotate, the gas inside the gas collection frame 3 will not directly contact the gas detector 8, thereby facilitating the gas detector 8 to accurately detect the adsorbed gas by thermal desorption or solvent elution by sending it to the gas detector 8 through the L-shaped rod 34 and the hollow rake 35;

[0103] It should be noted here that a heater is provided on the annular material frame 33 for heating the adsorbent to form thermal desorption, and has a detection function for the gas concentration process.

[0104] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A directional detection device based on gas leakage, comprising a collection shell (1), a cover plate (2) detachably mounted on the top of the collection shell (1), and a gas detector (8), characterized in that: The collection shell (1) is provided with a collection mechanism, and a driving component (7) for driving the collection mechanism is provided inside the collection shell (1); The interior of the collection shell (1) is fixedly connected to a gas collection frame (3); The collection mechanism comprises a directional output component (4), a plurality of negative pressure collection cylinders (5), and a plurality of pipeline components (6) connected to the negative pressure collection cylinders (5); The detection end of the gas detector (8) is detachably mounted on the gas output port of the directional output component (4), and the directional output component (4) is used to collect the gas collected by one of the negative pressure collection tubes (5) and output it to the detection end of the gas detector (8).

2. A directional detection device based on gas leakage according to claim 1, characterized in that: A plurality of negative pressure collection tubes (5) are fixed to the outer surface of the collection shell (1) in an equidistant and surrounding manner, and the two ends of the negative pressure collection tubes (5) are located inside and outside the collection shell (1); The negative pressure collection tube (5) is connected to the interior of the gas collection frame (3) through a drainage tube (51), and a piston plate (52) is slidably connected to the interior of the negative pressure collection tube (5), one end of the piston plate (52) is fixedly connected to a drive shaft (53), and one end of the drive shaft (53) extends to the outside of the negative pressure collection tube (5), and the drive assembly (7) is used to drive the drive shaft (53) to reciprocate.

3. A directional detection device based on gas leakage according to claim 2, characterized in that: The negative pressure collection tube (5) is provided with a collection port on the outside, and a first one-way valve is installed on the collection port, and the pipeline (6) is connected to the inside of the negative pressure collection tube (5) through the collection port; A through opening is provided inside the piston plate (52), and a one-way valve plate (54) is provided inside the through opening.

4. A directional detection device based on gas leakage according to claim 3, characterized in that: The pipeline component (6) comprises a collection tube (61), one end of which is detachably connected to the collection port of the negative pressure collection cylinder (5), and the other end of the collection tube (61) is provided with a collection nozzle (62), and a dust filter (63) is provided inside the collection nozzle (62).

5. The directional detection device based on gas leakage according to claim 1, characterized in that: A second one-way valve is provided at the other end of the outer surface of the collection nozzle (62), and a row of branch openings (64) are provided on the outer surface of the collection tube (61), and one-way valve plates are provided inside the branch openings (64).

6. The directional detection device based on gas leakage according to claim 1, characterized in that: The directional output member (4) comprises an annular plate (41) arranged inside the gas collecting frame (3); a collecting pipe (42) and a collecting cover (43) are fixedly connected inside the annular plate (41); the collecting pipe (42) is communicated with the inside of the collecting cover (43) through a pipeline; The driving assembly (7) is used to make the collecting cover (43) move in an annular motion, and to collect gas at an internal position of the gas collecting frame (3) through the annularly moving collecting cover (43); The top of the collecting pipe (42) extends to the top of the cover plate (2), and the detection end at the bottom of the gas detector (8) is detachably mounted inside the collecting pipe (42).

7. The directional detection device based on gas leakage according to claim 6, characterized in that: The inner side surface of the gas collecting frame (3) is provided with a plurality of anastomotic openings (31), and the interior of the gas collecting frame (3) is fixedly connected with a plurality of partition plates (32).

8. The directional detection device based on gas leakage according to claim 7, characterized in that: An annular material frame (33) is mounted on the top of the gas collecting frame (3), a vent is provided at the bottom of the annular material frame (33), an adsorbent for adsorbing and separating combustible substances is stored inside the annular material frame (33), and a skirt for pressing the annular material frame (33) is provided inside the cover plate (2).

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