A device for sampling and detecting natural gas

Abstract

The present application discloses a device for natural gas sampling and detection, including: a steel cylinder with an air inlet and an air outlet respectively opened at both ends, ventilation pipes for air intake and exhaust are arranged at both ends of the inner cavity of the steel cylinder, one end of the two ventilation pipes respectively penetrates and extends out of the air inlet and the air outlet on the steel cylinder, and a push-pull mechanism for extracting or discharging natural gas is also arranged in the steel cylinder; the push-pull mechanism includes a piston block slidably arranged in the steel cylinder for extracting and pushing natural gas, and two power storage components for driving the piston block to move. The rotating knob can drive the rotating plate to rotate clockwise and counterclockwise reciprocatingly through the connecting column, so as to drive the two winding cylinders to alternately wind the two elastic members and the two restraining belts, so that the elastic member located on one side of the piston block in a taut state can pull the piston block to move in the steel cylinder, so that the piston block can squeeze out the natural gas in the steel cylinder, and can move to generate negative pressure in the steel cylinder, so as to achieve the effect of extracting natural gas.

Description

Technical Field

[0001] The present application relates to the technical field of natural gas detection, and in particular to a device for natural gas sampling and detection. Background Art

[0002] As an economical and clean energy, natural gas is widely used in life. In order to improve the purity of natural gas and ensure its safe use, it is necessary to regularly test and analyze the content of natural gas. Since natural gas is flammable, special natural gas sampling equipment and testing equipment are required.

[0003] Currently, when natural gas is tested, sampling bags and sampling cylinders are mostly used to collect natural gas. Since the sampling bags can be deformed, they are easy to carry, and squeezing the sampling bags can easily discharge the natural gas inside. However, due to the material, the sampling bags are not very safe and are prone to explosion.

[0004] Compared with sampling bags, sampling cylinders have metal shells and are safer, but since sampling cylinders cannot be deformed, it is not convenient to discharge the natural gas inside them; and when collecting natural gas, when there is a certain pressure in the natural gas storage tank, the natural gas can be moved to the sampling cylinder due to the pressure difference, but when collecting natural gas in the air, since the air pressure is the same as the air pressure in the sampling cylinder, or the air pressure in the sampling cylinder is higher than the air pressure in the air, the natural gas in the air cannot enter the sampling cylinder, making it inconvenient to collect natural gas. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a natural gas sampling and detection device, which can control the cylinder to extract external natural gas and discharge the natural gas inside the cylinder when the valve on the cylinder is opened or closed, so as to facilitate the sampling and supply of natural gas for natural gas detection.

[0006] To achieve the above objectives, the present application provides a natural gas sampling and detection device, comprising: a steel cylinder with an air inlet and an air outlet respectively opened at both ends, ventilation pipes for air intake and exhaust are arranged at both ends of the inner cavity of the steel cylinder, one end of the two ventilation pipes respectively penetrates and extends out of the air inlet and the air outlet on the steel cylinder, and a push-pull mechanism for extracting or discharging natural gas is also arranged in the steel cylinder;

[0007] The push-pull mechanism includes a piston block slidably arranged in the steel cylinder for extracting and pushing natural gas, two power storage components for driving the piston block to move, and two driving components for controlling the power storage of the two power storage components. The two power storage components are respectively arranged at the two ends of the inner cavity of the steel cylinder and located on both sides of the two ends of the piston block;

[0008] The power storage assembly includes a bracket and a fixed shell, the bracket is fixedly arranged in the steel cylinder, the fixed shell is fixedly arranged on the bracket, a bottom plate is rotatably arranged in the fixed shell, a winding cylinder with one end rotating and penetrating the lower surface of the outer wall of the fixed shell is fixedly arranged on the bottom plate, an elastic member for elastically resetting and pulling the piston block to move is wound on the winding cylinder, a restraining belt is fixedly arranged on one end of the elastic member away from the winding cylinder, and the restraining belt is fixedly connected to the piston block;

[0009] The two driving assemblies are respectively arranged in the fixed shells of the two power storage assemblies, and the two driving assemblies are respectively rotatably connected to the bottom plates of the two power storage assemblies, and the two bottom plates are also provided with limit assemblies for the two driving assemblies to drive the bottom plates to rotate in one direction;

[0010] The driving assembly includes a rotating plate rotatably arranged in a fixed shell and a plurality of limit rods, the rotating plate is fixedly connected to the plurality of limit rods, the plurality of limit rods are located between the base plate and the rotating plate, and the plurality of limit rods are rotatably connected to the base plate, a connecting column is arranged on the rotating plate, the connecting column rotates and passes through a side surface of the fixed shell and a side wall surface of the cylinder and is fixedly provided with a knob that can drive the connecting column to rotate, a special-shaped groove is opened on the base plate, a limit ball that can limit the limit rod is rollingly arranged in the special-shaped groove, and the special-shaped groove is a closed ring with four corners, and three of the corners are provided with a contraction component that can drive the limit ball to move up and down.

[0011] Compared with the prior art, the beneficial effect of the present application is that rotating the knob can drive the rotating plate to rotate reciprocatingly clockwise and counterclockwise through the connecting column, so as to drive the two winding cylinders to alternately wind the two elastic parts and the two restraining belts, so that the elastic part located on one side of the piston block in a taut state can pull the piston block to move in the cylinder, so that the piston block can squeeze out the natural gas in the cylinder, and can move to generate negative pressure in the cylinder, thereby achieving the effect of extracting natural gas.

[0012] As an improvement, the limit assembly includes a limit block with an inclined surface, a connecting plate and a limit spring, and a limit cavity is provided on the bottom plate, and the limit block, connecting plate and limit spring are all slidably arranged in the limit cavity, and the connecting plate is located between the limit block and the limit spring, and the limit block and limit spring are fixedly connected to the connecting plate, and one end of the limit block slides through one side of the bottom plate and extends between two limit rods. When the rotating plate rotates counterclockwise, the limit rod and the limit block can push the bottom plate to rotate counterclockwise. When the rotating plate rotates clockwise, the limit rod can be driven to squeeze the inclined surface of the limit block, so that the limit block can move to the inside of the limit cavity, thereby achieving the effect of clockwise rotation of the rotating plate relative to the bottom plate, which is convenient for the winding tube to wind the elastic member and the restraining belt.

[0013] As an improvement, the contraction assembly includes a contraction spring and a movable seat. The base plate is located in the special-shaped groove, and installation grooves are provided at three corners. The contraction spring and the movable seat are both slidably arranged in the installation groove. The two ends of the contraction spring are respectively fixedly connected to the movable seat and the inner wall surface of the installation groove. One end of the movable seat is located in the special-shaped groove, and the movable seat is located at one end of the special-shaped groove and a channel is provided. The channel is connected with the special-shaped groove, and the limiting ball can move into the channel. When the limiting rod squeezes the limiting ball, the limiting ball can be hidden inside the installation groove, which can ensure that the rotating plate will not drive the base plate to rotate through the limiting ball.

[0014] As an improvement, a positioning plate and a positioning block are also slidably arranged in the limiting cavity, and the end of the limiting spring away from the connecting plate is fixedly connected to the positioning plate, and the positioning block is fixedly connected to the positioning plate. A plurality of positioning grooves are provided on the inner wall surface of the fixed shell, and one end of the positioning block slides through the bottom surface of the base plate and can be inserted into the plurality of positioning grooves in sequence. When the base plate rotates, it can drive the positioning block to rotate in the fixed shell, so that the positioning block can be inserted into the plurality of positioning grooves in sequence, respectively. The pressure generated by the positioning plate pushed by the limiting spring on the positioning block makes it possible for the positioning block to be inserted into the positioning groove to position the base plate, thereby preventing the base plate from rotating at will. When the elastic member accumulates force, it will not pull the winding drum to rotate, thereby improving stability.

[0015] As an improvement, two fixed cylinders with through holes are fixedly arranged in the steel cylinder, one end of the two fixed cylinders is respectively located inside the two winding cylinders, and one end of the two ventilation pipes is respectively located in the two fixed cylinders, so that natural gas can enter the inner cavity of the steel cylinder through the ventilation pipes and the fixed cylinders, and a sealing plug and an outer frame with a through hole are slidably arranged in the fixed cylinder, the sealing plug is clamped at the opening of the ventilation pipe, the outer frame is fixedly arranged on the top surface of the sealing plug, and one end of the outer frame slides through the top surface of the fixed cylinder, and the rotating plate is fixedly arranged on the side facing away from the connecting column A valve stem is arranged, and the valve stem rotates to pass through the bottom surface of the bottom plate and the through-hole on the outer frame and extends to the inside of the outer frame. The bottom end of the valve stem has a threaded groove, and a threaded sleeve is threadedly connected to the valve stem, and an extrusion block is sleeved on the threaded sleeve. The extrusion block can contact the top surface of the inner wall of the outer frame. The valve stem can be driven to rotate by turning the knob through the connecting column, and then the extrusion block can be controlled to move up and down through the threaded sleeve, so that the extrusion block can press down or lift up the outer frame, and then the outer frame can drive the sealing plug to move up and down, which is convenient for controlling the opening and closing of the ventilation pipe, so as to achieve the effect of controlling the natural gas entering and exiting the cylinder.

[0016] As an improvement, a sealing spring is also slidably arranged in the fixed cylinder, and the two ends of the sealing spring are respectively fixedly connected to the top surface of the inner wall of the fixed cylinder and the top surface of the sealing plug. The outer frame is located in the sealing spring, and the sealing spring can push the sealing plug to be connected to the opening of the ventilation pipe, which can ensure that after the extrusion block is separated from the outer frame, the sealing plug can be immediately stuck on the ventilation pipe, thereby avoiding natural gas leakage.

[0017] As an improvement, a positioning rod for limiting the rotation of the outer frame is fixedly arranged on the outer wall side of the outer frame. The positioning rod slides through the fixed tube and extends to the inside of the fixed tube. The positioning rod can limit the rotation of the outer frame so that the outer frame can only move up and down in a straight line, which can improve stability.

[0018] As an improvement, a strip groove is provided on the outer frame, and the extrusion block is slidably set in the strip groove. The strip groove can limit the extrusion block so that the limit block can move up and down in a straight line, cooperating with the straight line up and down movement of the outer frame to ensure that the thread sleeve can move up and down on the valve stem.

[0019] As an improvement, the extrusion block is rotatably sleeved on the silk sleeve, and a process groove is provided on the extrusion block. A spring piece is fixedly arranged in the process groove, and a protrusion fixedly connected to the spring piece is also slid in the process groove. A plurality of slots are provided on the silk sleeve, and the protrusion can be inserted into the plurality of slots in sequence. The extrusion block cannot move after contacting the top of the outer frame or the sealing plug. At this time, the rotation of the valve stem can drive the silk sleeve to rotate relative to the extrusion block. The knob can be rotated for a long time without changing the position of the sealing plug, thereby ensuring that the elastic member and the restraining belt can be completely wound.

[0020] A natural gas detection device comprises a detection body having an air inlet and an air outlet and capable of detecting natural gas, a bearing ring for lifting a steel cylinder and a limiting ring for limiting the position of the steel cylinder being hinged on the side wall surface of the detection body, the limiting ring being aligned with the bearing ring and being located directly above the bearing ring, the steel cylinder being insertable in the limiting ring and the bearing ring, the inner diameter of the limiting ring being larger than the maximum outer diameter of the steel cylinder, and the inner diameter of the bearing ring being smaller than the maximum outer diameter of the steel cylinder, a pipe being used to connect the vent pipe on the steel cylinder with the air inlet on the detection body, facilitating the entry of natural gas into the detection body and further enabling the detection of natural gas, the steel cylinder being insertable in the bearing ring and the limiting ring so that the steel cylinder is in a vertical state, facilitating the sinking of natural gas and further facilitating the discharge of natural gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of this application;

[0022] Figure 2 It is a schematic diagram of the local structure of this application;

[0023] Figure 3 It is a schematic diagram of the structure of the cylinder in this application;

[0024] Figure 4 It is a partial cross-sectional structural schematic diagram of the steel cylinder in this application;

[0025] Figure 5 For this application Figure 4 The enlarged structural diagram at A in the middle;

[0026] Figure 6 For this application Figure 4 The enlarged structural diagram at B in the middle;

[0027] Figure 7 It is a schematic diagram of the partial cross-sectional structure of the cylinder in this application from another perspective;

[0028] Figure 8 It is a schematic diagram of the structure of the fixed shell in this application;

[0029] Fig. 9 This is a schematic diagram of the structure of the transfer board in this application;

[0030] Fig.10 It is a schematic diagram of a partial cross-sectional structure of the bottom plate in this application;

[0031] Fig.11 It is a schematic diagram of the cross-sectional structure of the extrusion block in this application;

[0032] Fig.12 It is a schematic cross-sectional structure diagram of the fixed shell in this application;

[0033] Fig.13 It is a schematic diagram of the structure of the special-shaped groove in this application;

[0034] Fig.14 For this application Fig.10 Schematic diagram of the enlarged structure at point C in the middle.

[0035] In the figure: 1, cylinder; 2, vent pipe; 3, push-pull mechanism; 301, piston block; 4, power storage assembly; 401, bracket; 402, fixed shell; 403, bottom plate; 404, winding cylinder; 405, elastic member; 406, restraint belt; 5, driving assembly; 501, rotating plate; 502, limiting rod; 503, connecting column; 504, knob; 505, special-shaped groove; 506, limiting ball; 6, limiting assembly; 601, limiting block; 602, connecting plate; 603, limiting spring; 604, limiting cavity; 7, contraction assembly; 701, contraction spring; 702 , moving seat; 703, mounting groove; 704, channel; 8, positioning plate; 9, positioning block; 10, positioning groove; 11, fixing cylinder; 12, sealing plug; 13, outer frame; 14, valve stem; 15, thread sleeve; 16, extrusion block; 17, sealing spring; 18, positioning rod; 19, strip groove; 20, process groove; 21, spring piece; 22, protrusion; 23, slot; 24, detection body; 25, load-bearing ring; 26, limit ring; 27, special-shaped groove A; 28, special-shaped groove B; 29, point A; 30, point B; 31, point C; 32, point D; 33, lifting block. DETAILED DESCRIPTION

[0036] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0037] In the description of the present application, it should be noted that directional words, such as the terms "center", "up", "down", "front", "back", "vertical", "horizontal", "inside", "outside", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application 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, and cannot be understood as limiting the specific scope of protection of the present application.

[0038] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0039] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0040] The present application provides a natural gas sampling and detection device, such as Figure 1-14 As shown, it comprises: a steel cylinder 1 with an air inlet and an air outlet respectively opened at both ends, ventilation pipes 2 for air intake and exhaust are arranged at both ends of the inner cavity of the steel cylinder 1, one end of the two ventilation pipes 2 respectively penetrates and extends out of the air inlet and the air outlet on the steel cylinder 1, and a push-pull mechanism 3 for extracting or discharging natural gas is also arranged in the steel cylinder 1; the push-pull mechanism 3 comprises a piston block 301 slidably arranged in the steel cylinder 1 for extracting and pushing natural gas, two power storage components 4 for driving the piston block 301 to move, and two driving components 5 for controlling the power storage of the two power storage components 4, and the two power storage components 4 are respectively arranged in the steel cylinder 1. 1 and are located at both ends of the inner cavity and on both sides of the piston block 301; the power storage component 4 includes a bracket 401 and a fixed shell 402, the bracket 401 is fixedly arranged in the steel cylinder 1, the fixed shell 402 is fixedly arranged on the bracket 401, a bottom plate 403 is rotatably arranged in the fixed shell 402, a winding cylinder 404 with one end rotating and penetrating the lower surface of the outer wall of the fixed shell 402 is fixedly arranged on the bottom plate 403, an elastic member 405 for elastically resetting and pulling the piston block 301 to move is wound on the winding cylinder 404, wherein the elastic member 405 can be specifically an elastic belt, and one end of the elastic member 405 away from the winding cylinder 404 is fixed A restraining belt 406 is fixedly provided, and the restraining belt 406 is fixedly connected to the piston block 301; the two driving assemblies 5 are respectively arranged in the fixed shells 402 of the two power storage assemblies 4, and the two driving assemblies 5 are respectively rotatably connected to the bottom plates 403 in the two power storage assemblies 4, and the two bottom plates 403 are also provided with a limiting assembly 6 for the two driving assemblies 5 to drive the bottom plates 403 to rotate in one direction; the driving assembly 5 includes a rotating plate 501 rotatably arranged in the fixed shell 402 and a plurality of limiting rods 502, the rotating plate 501 is fixedly connected to the plurality of limiting rods 502, and the plurality of limiting rods 502 are all located on the bottom plate 403. The bottom plate 403 is provided with a connecting column 503, which rotates through one side of the fixed shell 402 and the side wall of the cylinder 1 and is fixed with a knob 504 that can drive the connecting column 503 to rotate. The bottom plate 403 is provided with a special-shaped groove 505, in which a limiting ball 506 that can limit the limiting rod 502 is rollingly arranged, and the special-shaped groove 505 is a closed ring with four corners, and three corners are provided with a contraction component 7 that can drive the limiting ball 506 to move up and down.

[0041] Specifically, Fig.12As shown, the limit assembly 6 includes a limit block 601 with an inclined surface, a connecting plate 602 and a limit spring 603, a limit cavity 604 is opened on the bottom plate 403, the limit block 601, the connecting plate 602 and the limit spring 603 are all slidably arranged in the limit cavity 604, the connecting plate 602 is located between the limit block 601 and the limit spring 603, and the limit block 601 and the limit spring 603 are both fixedly connected to the connecting plate 602, and one end of the limit block 601 slides through one side of the bottom plate 403 and extends between two of the limit rods 502.

[0042] It should be noted that when the rotating plate 501 rotates clockwise, it can drive the limit rod 502 to squeeze the inclined surface of the limit block 601. At this time, the limit block 601 can move into the limit cavity 604, and the rotating plate 501 cannot squeeze the limit block 601 when it is flipped. The distance between the two connected limit rods 502 at the limit block 601 is greater than the width and length of the limit block 601, so that the limit block 601 can be completely moved between any two adjacent limit rods 502.

[0043] Specifically, Fig.14 As shown, the contraction component 7 includes a contraction spring 701 and a movable seat 702. The bottom plate 403 is located on the special-shaped groove 505, and mounting grooves 703 are provided at three corners. The contraction spring 701 and the movable seat 702 are both slidably arranged in the mounting groove 703. The two ends of the contraction spring 701 are respectively fixedly connected to the movable seat 702 and the inner wall surface of the mounting groove 703. One end of the movable seat 702 is located in the special-shaped groove 505, and a channel 704 is provided at one end of the movable seat 702 located in the special-shaped groove 505, and the channel 704 is communicated with the special-shaped groove 505.

[0044] It should be noted that both special-shaped grooves 505 have four corners, and the installation grooves 703 are opened at three corners of the special-shaped grooves 505, and the installation grooves 703 are located at corners in the two special-shaped grooves 505 that are not completely in the same position, that is: the special-shaped groove 505 on the bottom plate 403 close to the air inlet of the cylinder 1 can be set as the special-shaped groove A27, and the special-shaped groove 505 on the bottom plate 403 close to the air outlet of the cylinder 1 can be set as the special-shaped groove B28, and the corners on the special-shaped grooves A27 and B28 are respectively set to point A 29, point B 30, point C 31 and point D 32, the installation grooves 703 in the special-shaped groove A27 are respectively located at point A 29, point C 31 and point D 32, and the installation grooves 703 in the special-shaped groove B28 are respectively located at point A 29, point B 30 and point C 31.

[0045] Specifically, Fig.12As shown, a positioning plate 8 and a positioning block 9 are also slidably arranged in the limiting cavity 604, one end of the limiting spring 603 away from the connecting plate 602 is fixedly connected to the positioning plate 8, the positioning block 9 is fixedly connected to the positioning plate 8, a plurality of positioning grooves 10 are provided on the inner wall surface of the fixed shell 402, one end of the positioning block 9 slides through the bottom surface of the bottom plate 403 and can be inserted into the plurality of positioning grooves 10 in sequence.

[0046] It should be noted that after the limit rod 502 squeezes the limit block 601, the limit block 601 squeezes the limit spring 603 through the connecting plate 602, so that the limit spring 603 squeezes the positioning block 9 through the positioning plate 8, ensuring that the bottom plate 403 will not rotate relative to the fixed shell 402. When the limit block 601 is located between the limit rods 502, the limit spring 603 extends and the bottom plate 403 rotates, so that the positioning block 9 contracts and can squeeze the limit spring 603 through the positioning plate 8, making it easier for the positioning block 9 to be hidden in the positioning groove 10.

[0047] Specifically, Fig.10 As shown, two fixed cylinders 11 with through holes are fixedly arranged in the steel cylinder 1, one end of the two fixed cylinders 11 is respectively located inside the two winding cylinders 404, and one end of the two ventilation pipes 2 is respectively located in the two fixed cylinders 11, so that natural gas can enter the inner cavity of the steel cylinder 1 through the ventilation pipes 2 and the fixed cylinders 11, and a sealing plug 12 and an outer frame 13 with a through hole are slidably arranged in the fixed cylinder 11, the sealing plug 12 is clamped at the opening of the ventilation pipe 2, the outer frame 13 is fixedly arranged on the top surface of the sealing plug 12, and one end of the outer frame 13 slides through the top surface of the fixed cylinder 11, and a valve stem 14 is fixedly arranged on the side facing away from the rotating plate 501 and the connecting column 503, and the valve stem 14 rotates through the bottom surface of the bottom plate 403 and the opening on the outer frame 13 and extends to the inside of the outer frame 13. The bottom end of the valve stem 14 has a threaded groove. The valve stem 14 is threadedly connected with a threaded sleeve 15, and the threaded sleeve 15 is sleeved with an extrusion block 16. The extrusion block 16 can contact the top surface of the inner wall of the outer frame 13. The rotating knob 504 can drive the valve stem 14 to rotate through the connecting column 503, and then the extrusion block 16 can be controlled to move up and down through the threaded sleeve 15, so that the extrusion block 16 can press down or lift up the outer frame 13, and then the outer frame 13 can drive the sealing plug 12 to move up and down, which is convenient for controlling the opening and closing of the ventilation pipe 2, so as to achieve the effect of controlling the natural gas entering and exiting the cylinder 1.

[0048] It should be noted that the sealing plug 12 can be in close contact with the opening of the ventilation pipe 2, so that when the sealing plug 12 is stuck at the opening of the ventilation pipe 2, the natural gas can be prevented from flowing. After turning the knob 504, the valve stem 14 can be driven to rotate through the connecting column 503 and the rotating plate 501, and then the extrusion block 16 can be driven to move up and down through the thread sleeve 15, so as to press down or lift up the outer frame 13, thereby achieving the effect of driving the sealing plug 12 to move up and down, and then achieving the effect of opening and closing the ventilation pipe 2.

[0049] Specifically, Figure 5-6 As shown, a sealing spring 17 is also slidably arranged in the fixed cylinder 11, and the two ends of the sealing spring 17 are fixedly connected to the top surface of the inner wall of the fixed cylinder 11 and the top surface of the sealing plug 12 respectively. The outer frame 13 is located in the sealing spring 17. The sealing spring 17 can push the sealing plug 12 to be clamped in the opening of the ventilation pipe 2, which can ensure that after the extrusion block 16 is separated from the outer frame 13, the sealing plug 12 can be immediately clamped on the ventilation pipe 2 to avoid natural gas leakage.

[0050] It should be noted that the sealing spring 17 can squeeze the sealing plug 12 so that the sealing plug 12 can be more tightly stuck at the opening of the ventilation pipe 2, thereby improving stability.

[0051] Specifically, a positioning rod 18 for limiting the rotation of the outer frame 13 is fixedly provided on the outer wall side of the outer frame 13. The positioning rod 18 slides through the fixed tube 11 and extends to the inside of the fixed tube 11. The positioning rod 18 can limit the rotation of the outer frame 13, so that the outer frame 13 can only move up and down in a straight line, which can improve stability.

[0052] It should be noted that the positioning rod 18 can limit the outer frame 13 and prevent the outer frame 13 from rotating, so that the outer frame 13 can only move up and down in a straight line.

[0053] Specifically, Figure 5-6 As shown, a strip groove 19 is opened on the outer frame 13, and the extrusion block 16 is slidably set in the strip groove 19. The strip groove 19 can limit the extrusion block 16, so that the limit block 601 can move up and down in a straight line, and cooperate with the straight line up and down movement of the outer frame 13 to ensure that the thread sleeve 15 can move up and down on the valve stem 14.

[0054] It should be noted that the strip groove 19 can limit the extrusion block 16, so that the limit block 601 can move up and down in a straight line, ensuring that the silk sleeve 15 can move up and down in a straight line.

[0055] Specifically, Fig.11 As shown, the extrusion block 16 is rotatably sleeved on the silk sleeve 15, and a process groove 20 is opened on the extrusion block 16. A spring piece 21 is fixedly arranged in the process groove 20. A protrusion 22 fixedly connected to the spring piece 21 is also slid in the process groove 20. A plurality of slots 23 are opened on the silk sleeve 15, and the protrusion 22 can be inserted into the plurality of slots 23 in sequence. The extrusion block 16 cannot move after contacting the top of the outer frame 13 or the sealing plug 12. At this time, the rotation of the valve stem 14 can drive the silk sleeve 15 to rotate relative to the extrusion block 16. The knob 504 can be rotated for a long time without changing the position of the sealing plug 12 to ensure that the elastic member 405 and the restraining belt 406 can be completely wound.

[0056] It should be noted that when the wire sleeve 15 rotates relative to the extrusion block 16, the height difference between the inner wall of the slot 23 and the outer wall of the wire sleeve 15 enables the wire sleeve 15 to squeeze the protrusion 22, and the protrusion 22 can squeeze the spring piece 21 after being compressed, so that the spring piece 21 and the protrusion 22 can be completely located inside the process groove 20.

[0057] Specifically, Figure 1-2 As shown, a natural gas detection device includes a detection body 24 with an air inlet and an air outlet that can be used to detect natural gas. A load ring 25 for lifting a steel cylinder 1 and a limit ring 26 for limiting the position of the steel cylinder 1 are hinged on the side wall surface of the detection body 24. The limit ring 26 is aligned with the load ring 25 and is located directly above the load ring 25. The steel cylinder 1 can be inserted into the limit ring 26 and the load ring 25. The inner diameter of the limit ring 26 is larger than the maximum outer diameter of the steel cylinder 1, and the inner diameter of the load ring 25 is smaller than the maximum outer diameter of the steel cylinder 1. A pipeline can be used to connect the vent pipe 2 on the steel cylinder 1 with the air inlet on the detection body 24, so that the natural gas can enter the detection body 24, and then the natural gas can be detected. The steel cylinder 1 can be inserted into the load ring 25 and the limit ring 26, so that the steel cylinder 1 is in a vertical state, which is convenient for the natural gas to sink and then the natural gas is discharged.

[0058] It should be noted that the detection body 24 is specifically a gas chromatograph, and the carrying ring 25 and the limiting ring 26 can be rotated to cover the detection body 24, and the detection body 24 is also provided with a lifting block 33 for lifting the limiting ring 26 and the carrying ring 25. The lifting block 33 can support the limiting ring 26 and the carrying ring 25 so that the limiting ring 26 and the carrying ring 25 can be in a horizontal state, that is, the cylinder 1 is in a vertical state when placed on the limiting ring 26 and the carrying ring 25.

[0059] The working principle of the present application is as follows: in the initial state, the elastic member 405 and the restraining belt 406 near the gas inlet of the cylinder 1 are completely wound around the winding tube 404, and a part of the elastic belt near the gas outlet of the cylinder 1 is wound around the winding tube 404, so that the elastic belt is in a tight state, and at the same time, the limiting balls 506 in the special-shaped grooves A27 and B28 are both located at point A 29. When natural gas needs to be extracted, the knob 504 near the gas outlet of the cylinder 1 is turned clockwise, and the knob 504 drives the rotating plate 501 to rotate through the connecting column 503. The rotating plate 501 can drive multiple limiting rods 502 to rotate, and the multiple limiting rods 502 can squeeze the inclined surface on the limiting block 601, so that the limiting block 601 can shrink into the limiting cavity 604. At this time, the limiting rod 5 02 rotation can push the limiting ball 506 from point A 29 to point B 30. Since point B 30 of the special-shaped groove B28 has a mounting groove 703, the limiting ball 506 can move up and down. When the limiting rod 502 rotates, the limiting ball 506 is squeezed, so that the limiting ball 506 squeezes the moving seat 702. At this time, the contraction spring 701 is contracted by force, and the moving seat 702 and the limiting ball 506 can be hidden in the mounting groove 703, so that the rotating plate 501 cannot drive the bottom plate 403 to rotate. At the same time, the rotating plate 501 drives the wire sleeve 15 to rotate through the valve stem 14, thereby enabling the extrusion block 16 to move upward. The extrusion block 16 lifts the outer frame 13 upward, which can drive the sealing plug 12 to separate from the ventilation pipe 2. At this time, the gas outlet of the cylinder 1 is opened, and then Rotate the spiral near the air inlet of the steel cylinder 1 clockwise, and the rotation of the rotating plate 501 can push the limiting ball 506 in the special-shaped groove A27 to move, so that the limiting ball 506 can move from point A 29 to point B 30. Since there is no mounting groove 703 at point B 30 in the special-shaped groove A27, the limiting ball 506 cannot be hidden. The limiting rod 502 can rotate to push the bottom plate 403 to rotate through the limiting ball 506, and the positioning block 9 is squeezed and contracted into the limiting groove. The bottom plate 403 drives the winding cylinder 404 to rotate, and the elastic member 405 and the restraining belt 406 wound thereon can be loosened. At the same time, the valve stem 14 rotates to open the sealing plug 12 at the air inlet of the steel cylinder 1. At this time, the elastic member 405 on the air outlet side of the steel cylinder 1, which has been in a tight state, begins to shrink. , which can pull the piston block 301 to move, so that negative pressure is generated on one side of the gas inlet of the steel cylinder 1, so that natural gas can be extracted. After the extraction is completed, the knob 504 at the gas outlet of the steel cylinder 1 is turned counterclockwise, and the sealing plug 12 is closed. At the same time, when the limit rod 502 rotates, it can push the limit block 601 to rotate, and then the bottom plate 403 can be pushed to rotate counterclockwise, so that the winding tube 404 can wind the elastic member 405 and the restraining belt 406 near the gas outlet of the steel cylinder 1. At this time, the limit cavity 604 moves from point B 30 to point C 31 and is hidden in the mounting groove 703 at point C 31. Then the knob 504 near the gas inlet of the steel cylinder 1 is turned counterclockwise, the sealing plug 12 is closed, and the rotating plate 501 drives the bottom plate 403 to rotate through the limit block 601.The winding tube 404 is able to wind the elastic band near the gas inlet of the steel cylinder 1 to make it tight and stretched. At this time, the limiting ball 506 moves from point B 30 in the special-shaped groove A27 to point C 31 and hides in point C 31 to complete the collection of natural gas. Then the steel cylinder 1 is placed in the carrying ring 25 and the limiting ring 26. At this time, the gas inlet of the steel cylinder 1 is connected to the detection body 24 through the pipeline. Then, the knob 504 near the gas inlet of the steel cylinder 1 is turned clockwise, the sealing plug 12 is opened, and the limiting rod 502 pushes The limiting ball 506 moves from point C 31 in the special-shaped groove A27 to point D 32 and is hidden in the mounting groove 703 at point D 32. At this time, the rotating plate 501 does not drive the bottom plate 403 to rotate. Then, the knob 504 near the gas outlet of the cylinder 1 is turned clockwise, and the sealing plug 12 is opened. The limiting ball 506 moves from point C 31 in the special-shaped groove B28 to point D 32. Since there is no mounting groove 703 at point D 32, the limiting ball 506 cannot be hidden. The rotating plate 501 drives the bottom plate 403 to rotate the rotating plate 501 through the limiting ball 506. The winding cylinder 404 can loosen the elastic member 405 and the restraining belt 406 near the gas outlet of the steel cylinder 1. At this time, the elastic belt near the gas inlet of the steel cylinder 1 elastically contracts, pulling the piston block 301 to move, and can squeeze the natural gas in the steel cylinder 1, so that the natural gas is discharged from the steel cylinder 1 and enters the detection body 24. After the detection is completed, the knob 504 near the gas inlet of the steel cylinder 1 is turned counterclockwise, the sealing plug 12 is closed, and the rotating plate 501 drives the bottom plate 403 to rotate through the limit block 601, and the winding cylinder 404 loosens the elastic member 405 and the restraining belt 406 near the gas outlet of the steel cylinder 1. 405 and the restraining belt 406 are wound, the limiting ball 506 moves from the D point 32 in the special-shaped groove A27 to the A point 29 and is hidden in the installation groove 703, the knob 504 close to the gas outlet of the cylinder 1 is turned counterclockwise, the sealing plug 12 is closed, the rotating plate 501 drives the bottom plate 403 to rotate through the limiting block 601, the winding cylinder 404 winds the elastic member 405, the elastic belt is in a tight state, and the limiting ball 506 moves from the D point 32 in the special-shaped groove B28 to the A point 29 and is hidden in the installation groove 703.

[0060] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A natural gas sampling device, characterized in that: include: A steel cylinder (1) having an air inlet and an air outlet at both ends, respectively; ventilation pipes (2) for air intake and exhaust are provided at both ends of the inner cavity of the steel cylinder (1); one end of the two ventilation pipes (2) respectively penetrates and extends out of the air inlet and the air outlet on the steel cylinder (1); and a push-pull mechanism (3) for extracting or exhausting natural gas is also provided inside the steel cylinder (1); The push-pull mechanism (3) comprises a piston block (301) slidably arranged in the steel cylinder (1) for extracting and pushing natural gas, two power storage components (4) for driving the piston block (301) to move, and two driving components (5) for controlling the power storage of the two power storage components (4), wherein the two power storage components (4) are respectively arranged at two ends of the inner cavity of the steel cylinder (1) and are located on both sides of the two ends of the piston block (301); The power storage component (4) comprises a bracket (401) and a fixed shell (402), wherein the bracket (401) is fixedly arranged in the cylinder (1), and the fixed shell (402) is fixedly arranged on the bracket (401), and a bottom plate (403) is rotatably arranged in the fixed shell (402), and a winding cylinder (404) is fixedly arranged on the bottom plate (403), one end of which is rotatably penetrates the lower surface of the outer wall of the fixed shell (402), and an elastic member (405) for elastically resetting and pulling the piston block (301) to move is wound on the winding cylinder (404), and a restraining belt (406) is fixedly arranged on one end of the elastic member (405) away from the winding cylinder (404), and the restraining belt (406) is fixedly connected to the piston block (301); The two driving assemblies (5) are respectively arranged in fixed shells (402) in the two power storage assemblies (4), and the two driving assemblies (5) are respectively rotatably connected to the bottom plates (403) in the two power storage assemblies (4), and the two bottom plates (403) are also provided with limit assemblies (6) for the two driving assemblies (5) to drive the bottom plates (403) to rotate in one direction; The driving assembly (5) comprises a rotating plate (501) rotatably arranged in a fixed shell (402) and a plurality of limiting rods (502); the rotating plate (501) is fixedly connected to the plurality of limiting rods (502); the plurality of limiting rods (502) are all located between the bottom plate (403) and the rotating plate (501); and the plurality of limiting rods (502) are rotatably connected to the bottom plate (403); a connecting column (503) is arranged on the rotating plate (501); and the connecting column (503) rotatably penetrates the fixed shell (402). A knob (504) capable of driving the connecting column (503) to rotate is fixedly arranged on one side of the bottom plate (403) and the side wall of the cylinder (1); a special-shaped groove (505) is provided on the bottom plate (403); a limiting ball (506) capable of limiting the limiting rod (502) is rotatably arranged in the special-shaped groove (505); the special-shaped groove (505) is a closed ring with four corners, wherein three of the corners are provided with a retracting component (7) capable of driving the limiting ball (506) to move up and down; The limiting assembly (6) comprises a limiting block (601) having an inclined surface, a connecting plate (602) and a limiting spring (603); a limiting cavity (604) is provided on the bottom plate (403); the limiting block (601), the connecting plate (602) and the limiting spring (603) are all slidably arranged in the limiting cavity (604); the connecting plate (602) is located between the limiting block (601) and the limiting spring (603); the limiting block (601) and the limiting spring (603) are both fixedly connected to the connecting plate (602); one end of the limiting block (601) slides through a side surface of the bottom plate (403) and extends to between two limiting rods (502); The contraction assembly (7) comprises a contraction spring (701) and a movable seat (702); the bottom plate (403) is provided with mounting grooves (703) at three corners of the special-shaped groove (505); the contraction spring (701) and the movable seat (702) are both slidably arranged in the mounting groove (703); the two ends of the contraction spring (701) are respectively fixedly connected to the inner wall surfaces of the movable seat (702) and the mounting groove (703); one end of the movable seat (702) is located in the special-shaped groove (505); and a channel (704) is provided at one end of the movable seat (702) located in the special-shaped groove (505); the channel (704) is communicated with the special-shaped groove (505).

2. The natural gas sampling device according to claim 1, characterized in that: A positioning plate (8) and a positioning block (9) are also slidably arranged in the limiting cavity (604); one end of the limiting spring (603) away from the connecting plate (602) is fixedly connected to the positioning plate (8); the positioning block (9) is fixedly connected to the positioning plate (8); a plurality of positioning grooves (10) are provided on the inner wall surface of the fixed shell (402); one end of the positioning block (9) slides through the bottom surface of the bottom plate (403) and can be inserted into the plurality of positioning grooves (10) in sequence.

3. The natural gas sampling device according to claim 1, characterized in that: Two fixed cylinders (11) with through holes are fixedly arranged in the steel cylinder (1), one end of the two fixed cylinders (11) is respectively located inside the two winding cylinders (404), and one end of the two ventilation pipes (2) is respectively located in the two fixed cylinders (11), so that natural gas can enter the inner cavity of the steel cylinder (1) through the ventilation pipes (2) and the fixed cylinders (11), and a sealing plug (12) and an outer frame (13) with a through hole are slidably arranged in the fixed cylinder (11), the sealing plug (12) is clamped at the opening of the ventilation pipe (2), and the outer frame (13) is fixedly arranged on the sealing plug (1 2), one end of the outer frame (13) slides through the top surface of the fixed cylinder (11), a valve stem (14) is fixedly provided on the side of the rotating plate (501) opposite to the connecting column (503), the valve stem (14) rotates through the bottom surface of the bottom plate (403) and the opening on the outer frame (13) and extends to the inside of the outer frame (13), the bottom end of the valve stem (14) has a threaded groove, a threaded sleeve (15) is threadedly connected to the valve stem (14), an extrusion block (16) is sleeved on the threaded sleeve (15), and the extrusion block (16) is capable of contacting the top surface of the inner wall of the outer frame (13).

4. The natural gas sampling device according to claim 3, characterized in that: A sealing spring (17) is also slidably disposed in the fixed cylinder (11), and two ends of the sealing spring (17) are respectively fixedly connected to the top surface of the inner wall of the fixed cylinder (11) and the top surface of the sealing plug (12), and the outer frame (13) is located in the sealing spring (17).

5. The natural gas sampling device according to claim 3, characterized in that: A positioning rod (18) for limiting the rotation of the outer frame (13) is fixedly arranged on the outer wall side of the outer frame (13); the positioning rod (18) slides through the fixing tube (11) and extends to the interior of the fixing tube (11).

6. The natural gas sampling device according to claim 3, characterized in that: The outer frame (13) is provided with a strip groove (19), and the extrusion block (16) is slidably arranged in the strip groove (19).

7. The natural gas sampling device according to claim 3, characterized in that: The extrusion block (16) is rotatably sleeved on the wire sleeve (15); a process groove (20) is provided on the extrusion block (16); a spring sheet (21) is fixedly arranged in the process groove (20); a protrusion (22) is slidably disposed in the process groove (20) and is fixedly connected to the spring sheet (21); a plurality of slots (23) are provided on the wire sleeve (15); and the protrusion (22) can be inserted into the plurality of slots (23) in sequence.

8. A natural gas detection device, using the natural gas sampling device according to any one of claims 1 to 7, characterized in that: The invention comprises a detection body (24) having an air inlet and an air outlet and capable of detecting natural gas. A bearing ring (25) for lifting a steel cylinder (1) and a limiting ring (26) for limiting the position of the steel cylinder (1) are hingedly connected on the side wall surface of the detection body (24). The limiting ring (26) is aligned with the bearing ring (25) and is located directly above the bearing ring (25). The steel cylinder (1) can be inserted into the limiting ring (26) and the bearing ring (25). The inner diameter of the limiting ring (26) is larger than the maximum outer diameter of the steel cylinder (1), and the inner diameter of the bearing ring (25) is smaller than the maximum outer diameter of the steel cylinder (1).

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