Multi-stage metering device for gas leakage
By designing a multi-stage metering device and utilizing electric push rods and linkage mechanisms, real-time monitoring and accurate measurement of gas concentration were achieved, resolving the uncertainty of gas leakage, ensuring gas safety, simplifying the operation process, and improving the accuracy and reliability of measurement.
Patent Information
- Application Number
- CN202520168956.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-01-24
AI Technical Summary
Existing gas metering devices cannot accurately monitor concentration changes at various locations after gas diffusion, resulting in insufficient understanding of gas leaks, lack of flexibility and comprehensiveness, and inability to effectively prevent dangerous accidents such as gas explosions.
A multi-stage metering device was designed, including a sampling box and a drive mechanism. The movement of the long plate and the short plate is driven by an electric push rod. Combined with the linkage mechanism and the limit mechanism, the real-time monitoring and accurate measurement of gas concentration can be achieved. The controller, explosion-proof gas detector and valve are used to ensure gas safety and to extract gas samples for testing in a sealed state.
It enables accurate recording and multiple measurements of gas concentration, reduces the impact of gas changes on measurements, ensures gas safety, has a reasonable structural design, is simple to operate and easy to maintain, and improves the accuracy and reliability of measurements.
Smart Images
Figure CN223856817U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to gas technology field especially a kind of multistage measuring device for gas leakage. BACKGROUND
[0002] The measuring device for gas leakage is a device that can monitor and record gas leakage in real time, which perceives gas flow, concentration and other parameters through multi-stage sensors, and carries out accurate measurement and analysis to provide data support for coal mine safety management.
[0003] At present, gas measuring device is usually set in a specific area, which can only cover the area, and outside the gas pipe, once gas leakage occurs, gas will diffuse in the air, and its concentration will change constantly, which brings great challenge to the accurate measurement of gas leakage, and this variability makes it difficult to monitor, risk control, stable control and prevent gas explosion and other dangerous accidents, and the current monitoring means lacks flexibility, and cannot fully reflect the gas concentration in each position in mine, so that the specific situation of gas leakage is not understood.
[0004] Therefore, it is urgent to provide a multistage measuring device for gas leakage to solve the above problems. UTILITY MODEL CONTENT
[0005] The utility model solves the technical problem of overcoming the above-mentioned prior art, and provides a multistage measuring device for gas leakage.
[0006] To solve the above technical problems, one technical scheme of the utility model is to provide a multistage measuring device for gas leakage, which comprises an outer pipeline, a gas pipeline is installed in the outer pipeline, a sampling box one and a sampling box two are fixedly connected to the top inner wall of the outer pipeline, a driving mechanism is also fixedly connected to the top inner wall of the outer pipeline, a telescopic mechanism is slidably connected to the rear end of the sampling box one, and a linkage mechanism is slidably connected to the front end of the sampling box two.
[0007] The top inner wall of the outer pipeline is fixedly connected with a limiting mechanism.
[0008] The utility model is further provided as follows: a controller is installed on the top of the outer pipeline, a plurality of explosion-proof gas detectors are installed in the outer pipeline and electrically connected with the controller, a valve is installed in the gas pipeline and electrically connected with the controller, a sampling pipe is inserted into the top of the sampling box one and the sampling box two, the sampling box one and the sampling box two are fixedly connected, and the sampling box one and the sampling box two are designed with hollow front and rear ends.
[0009] Through the above technical scheme, in order to ensure gas safety, through the controller, the explosion-proof gas detector and the valve, the real-time monitoring of the gas concentration is realized, the explosion-proof gas detector continuously monitors the gas content in the air, and once the concentration exceeds the preset safety threshold, it will immediately send an alarm signal to the controller, and the controller will take two actions after receiving the signal: one is to close the valve of the gas pipeline to cut off the gas supply; the second is to activate the alarm lamp to send a prominent warning signal to remind the relevant personnel to take timely response measures; when the gas-containing gas enters the sampling box one and the sampling box two, and both are in a sealed state, the sampling pipe will extract the gas therein for detection, which reduces the influence of variability on gas concentration measurement, and can accurately record the gas concentration at a certain time point and a certain place, facilitating subsequent metering analysis, and the hollow design of the sampling box one and the sampling box two not only facilitates cooperation with the long plate, the short plate and the horizontal plate to effectively collect gas, but also enables the collected gas to be smoothly discharged.
[0010] The utility model further sets up: drive mechanism includes the L type board of fixed connection in the outer pipeline inner wall top, L type board bottom fixed connection has electric push rod, the output fixed connection of electric push rod has pull rod, the top and bottom of pull rod are rotatory connection has connecting rod respectively, two connecting rods other end rotatory connection has vertical board, vertical board's one side fixed connection has a plurality of long pole towards sampling box one.
[0011] Through the above technical scheme, the core function of the drive mechanism is to drive the long plate and the short plate away from or close to the sampling box one to collect or discharge the gas, and the electric push rod is started through the program preset by the controller, which relates to software control and is prior art, when the electric push rod is activated, its output end pushes the pull rod to move towards the sampling box one, and then drives one end of the connecting rod to move synchronously, causes the deflection of the connecting rod as a whole, the other end of the connecting rod moves in the opposite direction (i.e. the direction away from the sampling box one), drives the vertical plate to move away from the sampling box one, drives the long pole to move away from the sampling box one, this chain action promotes the long pole, the long plate and the short plate connected with it to move away from the sampling box one.
[0012] The utility model further sets up: the telescopic mechanism includes the short plate of with sampling box one front end contact and the long plate of with sampling box one rear end contact, the short plate, long plate are fixedly connected with a plurality of long pole one end respectively, the size of long plate is greater than the size of short plate.
[0013] Through the technical scheme, the telescopic mechanism realizes the sealing and non-sealing of the sampling box one through the telescopic movement of the long plate and the short plate. In the initial state, the long plate and the short plate are in close contact with the sampling box one and jointly form a closed environment. Once gas leakage is detected, the electric push rod is started to move the long plate and the short plate until the part of the long plate beyond the short plate still keeps contact with the sampling box one, while the short plate is separated from the sampling box one, thereby allowing air to enter the inside of the sampling box one. After the sampling box one successfully collects the gas containing the gas, the long plate and the short plate are driven in reverse to be close to the sampling box one again, and then the sampling pipe is started to extract the sample gas for detection and measurement. This process effectively reduces the influence of gas change on the measurement of gas concentration.
[0014] The utility model further sets up: the linkage mechanism includes respectively with sampling box two front end, rear end contact opposite horizontal plate, two The horizontal plate fixed connection, long plate one end fixed connection has two cylinder one to sampling box two, two The cylinder one all slidingly connected has rear end is isosceles triangle's column one, two The column one all fixed connection has board two to sampling box one one side, two The board two all slidingly connected have rear end with long plate front end fixed connection axle two, two The axle two all outside all are equipped with tension spring, the front end fixed connection has board three to the horizontal plate of sampling box two front end, board three other end slidingly connected have axle three, axle three rear end fixed connection has board four, axle three outside fixed connection has the protruding piece through board three, axle three outside all are equipped with spring one.
[0015] Through the technical scheme, the linkage mechanism controls the opening and closing state of the sampling box two through the movement of the long plate and the short plate, initially, the sampling box one and the sampling box two are in the sealed state, and there is no gas in the inside, which is to prevent the gas leakage from affecting the measurement accuracy, once the gas leakage is detected, the controller will start the electric push rod to drive the long plate and the short plate to move, one end of the long plate contacts the sampling box one, and the short plate is separated from the sampling box one, and the gas collection is started, after a period of time, the electric push rod is reversely driven, so that the long plate and the short plate are in contact with the sampling box one again and are sealed, then the sampling pipe is started, and the gas in the sealed environment is extracted for accurate measurement, so as to reduce the influence of the gas concentration change in the air on the measurement; if the gas in the air needs to be measured again, the electric push rod pushes the long plate and the short plate to move towards the sampling box two, and then pushes the cylinder one, the column one and other components to move synchronously, the column one is in contact with the plate five, and the tension spring is stressed; then the column one is in contact with the plate four, and pushes the plate four and the transverse plate connected with the plate four to move away from the sampling box two, and the compression spring two is compressed, when the transverse plate is separated from the sampling box two, the other transverse plate is still in contact with the sampling box two and is sealed, at this time, the gas can be collected through the sampling box two, and the long plate and the short plate are separated from the sampling box one, so that the air can flush away the previously collected gas, and preparation is made for the next operation; when the sampling box two collects the gas and needs to be closed, the electric push rod pushes the transverse plate to move away from the sampling box two, when the column one is pushed by the long plate to the edge of the plate five, the plate five is no longer in contact with the column one, the column one moves away from the plate four under the tension of the tension spring, and the transverse plate is reset under the elastic force of the spring two, the two transverse plates are in contact with the sampling box two and form a sealed environment, then the sampling pipe extracts the gas in the sampling box two for measurement, at this time, the long plate and the short plate are still separated from the sampling box one; if the third gas extraction and detection is needed, the electric push rod is started to move the column one towards the sampling box one, since the rear end of the column one is triangular, the inclined surface of the rear end is in contact with the plate five and drives the column one to reset, at this time, the tension spring is stressed; at the same time, the column one is in contact with the plate four and slides on the plate three through the shaft three, and the compression spring one is compressed, then the long plate and the short plate are matched with the sampling box one again, and the third detection is completed, the multiple measurement and measurement can be realized, the gas concentration content at a certain time point and a certain place can be accurately measured, the influence of the air flow on the gas concentration measurement is reduced, and the method is convenient, fast, simple and practical.
[0016] The utility model further sets up: the limiting mechanism includes a plurality of limiting shafts fixedly connected in the inside of outer pipeline, long plate, short plate, transverse plate's side away from sampling box one all are fixedly connected with a plurality of limiting block, a plurality of limiting block are slidably connected with a plurality of limiting shaft respectively, a plurality of limiting shaft's one end close to sampling box two is fixedly connected with two first support respectively, the limiting block of transverse plate one side and first support between be provided with spring two of the sleeve in limiting shaft outside, limiting shaft outside fixedly connected with plate five with column one rear end contact resistance.
[0017] Through the technical scheme, the limiting mechanism is used for limiting and guiding the long plate, the transverse plate and the short plate respectively, when the long plate, the transverse plate and the short plate move, the limiting blocks are driven to move, the limiting blocks slide on the limiting shafts, the transverse plate is automatically reset by the spring two, and the plate five abuts against the column one.
[0018] The utility model discloses the beneficial effect is as follows:
[0019] 1. The utility model discloses a through electric push rod drive long plate and short plate's removal, and the opening and closing of linkage mechanism control transverse plate, realized accurate measurement to gas gas, in sealed state, sampling pipe can extract the gas containing gas and carry out detection, effectively reduced the influence of gas change to gas concentration measurement, can accurately record the gas concentration of a time point, a place, convenient subsequent measurement and analysis, design has linkage mechanism, through the removal of long plate and short plate, can realize multiple detection, improved the accuracy and reliability of measurement.
[0020] 2. The utility model discloses the cooperation of limiting shaft and limiting block, ensure the stability of long plate, short plate and transverse plate in the moving process, simultaneously, spring two and the setting of tension spring make transverse plate and column one can be automatically reset when losing external force, simplify the operation process, improve work efficiency, through the cooperation of controller, explosion -proof gas detector and valve, realized the real -time monitoring of gas concentration, once detecting that gas concentration is overproof, controller will close gas pipeline valve immediately, cut off gas supply, and activate alarm lamp and remind personnel to respond, thereby ensure gas safety, the structure design is reasonable, and the cooperation of parts is close, not only realizes multiple measurement measurement's function, also reduces the influence that air flow causes to gas concentration measurement, simultaneously, the utility model discloses simple operation convenient, easy maintenance and maintenance have higher practical value. ACCURACY
[0021] Figure 1 It is the first view structure diagram of the utility model;
[0022] Figure 2 It is the second view sectional view of the utility model;
[0023] Figure 3 It is another orientation sectional view of Figure 2 ;
[0024] Figure 4 It is another orientation sectional view of Figure 3 ;
[0025] Figure 5 It is the local enlarged view of A in Figure 4 ;
[0026] Figure 6 It is another orientation sectional view of Figure 4a close-up view of the middle B;
[0027] Figure 7 for Figure 4 another side sectional view.
[0028] In the figure: 1, outer pipeline; 2, gas pipeline; 3, sampling box one; 4, sampling box two; 5, driving mechanism; 501, L-shaped plate; 502, electric push rod; 503, pull rod; 504, connecting rod; 505, vertical plate; 506, long rod; 6, telescopic mechanism; 601, short plate; 602, long plate; 7, linkage mechanism; 701, horizontal plate; 702, cylinder one; 703, column one; 704, plate two; 705, shaft two; 706, pull spring; 707, plate three; 708, shaft three; 709, plate four; 710, protruding block; 711, spring one; 8, limiting mechanism; 801, limiting shaft; 802, limiting block; 803, first support; 804, spring two; 805, plate five; 9, controller; 10, explosion-proof gas detector; 11, valve; 12, sampling pipe. DETAILED DESCRIPTION
[0029] The advantages and features of the present application will be more apparent from the following detailed description of preferred embodiments of the present application, taken in conjunction with the accompanying drawings, in which:
[0030] Please refer to Figures 1-7This embodiment provides a multi-stage metering device for gas leakage, comprising an outer pipe 1, a gas pipe 2 installed inside the outer pipe 1, sampling boxes 3 and 4 fixedly connected to the top of the inner wall of the outer pipe 1, and a drive mechanism 5 fixedly connected to the top of the inner wall of the outer pipe 1. The drive mechanism 5 includes an L-shaped plate 501 fixedly connected to the top of the inner wall of the outer pipe 1, an electric push rod 502 fixedly connected to the bottom of the L-shaped plate 501, a pull rod 503 fixedly connected to the output end of the electric push rod 502, connecting rods 504 rotatably connected to the top and bottom of the pull rod 503, and vertical plates 505 rotatably connected to the other ends of the two connecting rods 504. Multiple long rods 506 are fixedly connected to the side of the vertical plate 505 facing the sampling box 3. The core function of the drive mechanism 5 is to drive the long plates 602. The short plate 601 is moved away from or near the sampling box 3 to collect or release gas. The electric push rod 502 is activated by a preset program of the controller 9. This part involves software control and is prior art. When the electric push rod 502 is activated, its output end pushes the pull rod 503 to move towards the sampling box 3, which in turn drives one end of the connecting rod 504 to move synchronously, causing the entire connecting rod 504 to deflect. The other end of the connecting rod 504 moves in the opposite direction, away from the sampling box 3, which drives the vertical plate 505 to move away from the sampling box 3, and drives the long rod 506 to move away from the sampling box 3. This chain action causes the long rod 506 and the connected long plate 602 and short plate 601 to move away from the sampling box 3.
[0031] like Figures 4-6 As shown, a telescopic mechanism 6 is slidably connected to the rear end of sampling box 3. The telescopic mechanism 6 includes a short plate 601 that contacts and abuts against the front end of sampling box 3, and a long plate 602 that contacts and abuts against the rear end of the short plate 601. The short plate 601 and the long plate 602 are respectively fixedly connected to one end of multiple long rods 506. The size of the long plate 602 is larger than the size of the short plate 601. The function of the telescopic mechanism 6 is to achieve the sealing and unsealing of sampling box 3 by the extension and retraction of the long plate 602 and the short plate 601. In the initial state, both the long plate 602 and the short plate 601 are in close contact with sampling box 3, forming a closed system. In the event of a gas leak, the electric actuator 502 is activated, pushing the long plate 602 and the short plate 601 to move until the portion of the long plate 602 extending beyond the short plate 601 remains in contact with the sampling box 3, while the short plate 601 separates from the sampling box 3. This allows air to enter the sampling box 3. Once the sampling box 3 successfully collects gas containing gas, the long plate 602 and the short plate 601 are driven in reverse to bring them back into contact with the sampling box 3. Subsequently, the sampling tube 12 is activated to extract sample gas for detection and measurement. This process effectively reduces the impact of gas changes on gas concentration measurement.
[0032] like Figures 4-6As shown, the front end of the sampling box two 4 is slidably connected with a linkage mechanism 7, the linkage mechanism 7 includes two horizontal plates 701 which are in contact with the front end and the rear end of the sampling box two 4 respectively, the two horizontal plates 701 are fixedly connected, one end of the long plate 602 towards the sampling box two 4 is fixedly connected with two cylinders one 702, the two cylinders one 702 are slidably connected with two columns one 703 which are isosceles triangle in rear end, two columns one 703 are fixedly connected with two plates two 704 which are towards one side of the sampling box one 3, two plates two 704 are slidably connected with two shafts two 705 which are fixedly connected with the front end of the long plate 602 in rear end, two shafts two 705 are externally sleeved with two tension springs 706, the front end of the horizontal plate 701 located at the front end of the sampling box two 4 is fixedly connected with a plate three 707, the other end of the plate three 707 is slidably connected with a shaft three 708, the rear end of the shaft three 708 is fixedly connected with a plate four 709, the shaft three 708 is externally fixedly connected with a protrusion 710 which passes through the plate three 707, the shaft three 708 is externally sleeved with a spring one 711, the linkage mechanism 7 controls the opening and closing state of the sampling box two 4 through the movement of the long plate 602 and the short plate 601, initially, the sampling box one 3 and the sampling box two 4 are in sealed state, there is no gas inside, which is to prevent gas leakage from affecting the accuracy of measurement, once the gas leakage is detected, the controller 9 will start the electric push rod 502 to drive the long plate 602 and the short plate 601 to move, one end of the long plate 602 contacts the sampling box one 3, at the same time, the short plate 601 is separated from the sampling box one 3, and the gas collection starts, after a period of time, the electric push rod 502 is reversely driven to make the long plate 602 and the short plate 601 contact and seal the sampling box one 3 again, then the sampling pipe 12 starts to extract the gas in the sealed environment for accurate measurement, so as to reduce the interference of the change of gas concentration in the air on the measurement; if it is necessary to measure the gas in the air again, the electric push rod 502 will push the long plate 602 and the short plate 601 to move towards the sampling box two 4, and then push the cylinder one 702, the column one 703 and other components to move synchronously, the column one 703 contacts the plate five 805, at this time, the tension spring 706 is stressed; then the column one 703 contacts the plate four 709 and pushes the plate four 709 and the horizontal plate 701 connected therewith to move away from the sampling box two 4, compressing the spring two 804, when the horizontal plate 701 is separated from the sampling box two 4, the other horizontal plate 701 is still in contact with and seals the sampling box two 4, at this time, the gas can be collected through the sampling box two 4, at the same time, the long plate 602 and the short plate 601 are separated from the sampling box one 3, so that the air can flush away the previously collected gas, preparing for the next operation;When the sampling box two 4 is collected and needs to be closed, the electric push rod 502 pushes the horizontal plate 701 to move away from the sampling box two 4, when the column one 703 is pushed to the edge of the plate five 805 by the long plate 602, the plate five 805 no longer abuts against the column one 703, the column one 703 moves away from the plate four 709 under the pulling force of the tension spring 706, the horizontal plate 701 is reset under the elastic force of the spring two 804, the two horizontal plates 701 are in contact with the sampling box two 4 at the same time and form a sealed environment, then the sampling pipe 12 extracts the gas in the sampling box two 4 for metering detection, at this time, the long plate 602 and the short plate 601 are still separated from the sampling box one 3; if the third gas extraction detection is needed, the electric push rod 502 is started to make the column one 703 move towards the sampling box one 3, because the rear end of the column one 703 is triangular, the inclined surface thereof is in contact with the plate five 805 and drives the column one 703 to reset, at this time, the tension spring 706 is stressed; at the same time, the column one 703 abuts against the plate four 709 and slides on the plate three 707 through the shaft three 708, and the spring one 711 is compressed, then the long plate 602 and the short plate 601 cooperate with the sampling box one 3 again to complete the third detection, multiple measurements can be realized, and the gas concentration content at a certain time point and a certain place can be accurately measured, the influence of air flow on gas concentration measurement is reduced, and convenience, speed, simplicity and practicality are achieved.
[0033] As shown in Figure 7 the outer pipeline 1 inner wall top is fixedly connected with a limiting mechanism 8, the limiting mechanism 8 comprises a plurality of limiting shafts 801 fixedly connected inside the outer pipeline 1, the long plate 602, the short plate 601 and the horizontal plate 701 are fixedly connected with a plurality of limiting blocks 802 on the side away from the sampling box one 3, the plurality of limiting blocks 802 are slidably connected with the plurality of limiting shafts 801 respectively, the plurality of limiting shafts 801 are fixedly connected with two first supports 803 respectively at the end close to the sampling box two 4, the limiting block 802 on the side of the horizontal plate 701 is provided with the spring two 804 sleeved outside the limiting shaft 801 between the limiting block 802 and the first support 803, the limiting shaft 801 is fixedly connected with the plate five 805 in contact with the rear end of the column one 703, the limiting mechanism 8 is used for limiting and guiding the long plate 602, the horizontal plate 701 and the short plate 601 respectively, when the long plate 602, the horizontal plate 701 and the short plate 601 move, the limiting blocks 802 are driven to move, the limiting blocks 802 slide on the limiting shafts 801, the horizontal plate 701 is automatically reset by the spring two 804, and the column one 703 is abutted by the plate five 805.
[0034] As shown in Figures 1-7As shown, the top of the outer pipeline 1 is provided with a controller 9, and a plurality of explosion-proof gas detectors 10 are installed in the outer pipeline 1 and electrically connected to the controller 9, a valve 11 is installed in the gas pipeline 2 and electrically connected to the controller 9, the top of the sampling box one 3 and the sampling box two 4 are respectively provided with a sampling pipe 12, the sampling box one 3 and the sampling box two 4 are fixedly connected, and the sampling box one 3 and the sampling box two 4 are hollow designed at the front and rear ends. In order to ensure the safety of gas, the controller 9, the explosion-proof gas detector 10 and the valve 11 are used to realize real-time monitoring of the gas concentration, the explosion-proof gas detector 10 continuously monitors the gas content in the air, and once the concentration exceeds the preset safety threshold, it will immediately send an alarm signal to the controller 9, and the controller 9 will take two actions after receiving the signal: one is to close the valve 11 of the gas pipeline 2 to cut off the gas supply; the second is to activate the alarm lamp to issue a prominent warning signal to remind the relevant personnel to take timely response measures; when the gas containing gas enters the sampling box one 3 and the sampling box two 4, and both of them are in a sealed state, the sampling pipe 12 will extract the gas therein for detection, this design reduces the influence of variability on gas concentration measurement, and can accurately record the gas concentration at a certain time point and a certain place, which is convenient for subsequent measurement and analysis, and the hollow design of the sampling box one 3 and the sampling box two 4 not only facilitates cooperation with the long plate 602, the short plate 601 and the horizontal plate 701 to effectively collect gas, but also enables the collected gas to be smoothly discharged.
[0035] The utility model discloses a long plate 602 and short board 601 are closely attached sampling box no. 3, form closed environment under the initial state, simultaneously, two horizontal boards 701 also are closely attached the front and back of sampling box no. 2 4 respectively, keep its seal, the gas concentration in air is continuously monitored to the explosion -proof gas detector 10, once the gas concentration is detected to exceed the standard, controller 9 immediately starts electric push rod 502, electric push rod 502 promotes long plate 602 and short board 601 to move, and the part of long plate 602 that exceeds short board 601 still contacts sampling box no. 3, and short board 601 then separates, and the air containing gas is allowed to enter sampling box no. 3, after a period of time, electric push rod 502 reverse drive, and long plate 602 and short board 601 reset, and sampling box no. 3 is sealed again, at this time, sampling pipe 12 extracts the gas in sampling box no. 3 and carries out detection, and the gas concentration is accurately recorded, if needing detection again, electric push rod 502 continues to promote long plate 602 and short board 601 to move, and simultaneously drive the synchronous movement of cylinder no. 702, column no. 703 and other components in linkage mechanism 7, column no. 703 and plate no. 805 contact and abut, and simultaneously column no. 703 continues to move until contacting plate no. 709, and promotes horizontal board 701 to move to the direction of being away from sampling box no. 2 4, makes sampling box no. 2 4 front end open, and starts to collect gas, after collecting, electric push rod 502 continues to drive, and column no. 703 is separated from plate no. 709 due to the pulling of tension spring 706 under the condition of losing plate no. 805 abutting, and horizontal board 701 resets under the action of spring no. 2 804, and sampling box no. 2 4 is sealed again, sampling pipe 12 extracts the gas in sampling box no. 2 4 and carries out detection subsequently, when detecting for the third time, electric push rod 502 drives long plate 602 and short board 601 to move to contact sampling box no. 3, during the whole process, limit shaft 801 and limit block 802 cooperate, and long plate 602, short board 601 and horizontal board 701 are ensured to move stably, simultaneously, the setting of spring no. 2 804 and tension spring 706 is helpful to the automatic reset of horizontal board 701 and column no. 703, in addition, controller 9 is also responsible for receiving the alarm signal of explosion -proof gas detector 10, and immediately closes gas pipeline 2 valve 11 once detecting that the gas concentration exceeds the standard, and cuts off the gas supply, and activates the alarm lamp and reminds personnel to respond, through multiple detections, the gas concentration of different time points and different places can be accurately measured, the disturbance of air flow to the measurement result is effectively reduced, the gas safety is ensured, and sampling box no. 2, sampling box 3 are provided with multiple groups, can be placed in different areas respectively, realize the effect of multistage measurement.
[0036] The above-mentioned is only the embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent flow conversion using the utility model specification and the attached drawing contents, or direct or indirect application in other related technical fields, all are included in the patent protection range of the utility model.
Claims
1. A multi-stage metering device for gas leakage, comprising an outer pipe (1) in which a gas pipe (2) is installed, characterized in that: The outer pipeline (1) inner wall top fixedly connected with sampling box one (3), sampling box two (4), the outer pipeline (1) inner wall top is also fixedly connected with drive mechanism (5), sampling box one (3) rear end slidingly connected with telescopic mechanism (6), sampling box two (4) front end slidingly connected with linkage mechanism (7); The outer pipeline (1) inner wall top fixedly connected with limiting mechanism (8).
2. A multi-stage metering device for gas leakage according to claim 1, characterized in that: The outer pipeline (1) top is provided with a controller (9), a plurality of explosion-proof gas detectors (10) are installed in the outer pipeline (1), and the explosion-proof gas detectors (10) are electrically connected with the controller (9), a valve (11) is installed in the gas pipeline (2) and is electrically connected with the controller (9), sampling tubes (12) are inserted into the top of the sampling box one (3) and the sampling box two (4), the sampling box one (3) and the sampling box two (4) are fixedly connected, and the sampling box one (3) and the sampling box two (4) are designed to be hollow at the front and rear ends.
3. The multi-stage metering device for gas leakage according to claim 1, wherein: The drive mechanism (5) comprises an L-shaped plate (501) fixedly connected to the top of the inner wall of the outer pipeline (1), an electric push rod (502) fixedly connected to the bottom end of the L-shaped plate (501), a pull rod (503) fixedly connected to the output end of the electric push rod (502), and a connecting rod (504) rotatably connected to the top end and the bottom end of the pull rod (503), respectively, wherein the other ends of the two connecting rods (504) are rotatably connected to a vertical plate (505), and a plurality of long rods (506) are fixedly connected to one side of the vertical plate (505) facing the sampling box one (3).
4. A multi-stage metering device for gas leakage according to claim 3, wherein: The telescopic mechanism (6) comprises a short plate (601) in contact with the front end of the sampling box one (3), a long plate (602) fixedly connected to the rear end of the sampling box one (3), and a plurality of long rods (506) fixedly connected to one end of the short plate (601) and the long plate (602), respectively, wherein the size of the long plate (602) is greater than that of the short plate (601).
5. A multi-stage metering device for gas leakage according to claim 4, characterized in that: The linkage mechanism (7) comprises a horizontal plate (701) in contact with the front end and the rear end of the sampling box two (4), respectively, wherein the two horizontal plates (701) are fixedly connected, two cylinders one (702) are fixedly connected to one end of the long plate (602) facing the sampling box two (4), a column one (703) in the shape of an isosceles triangle is slidingly connected to the inside of each of the two cylinders one (702), a plate two (704) is fixedly connected to one side of each of the two column ones (703) facing the sampling box one (3), a shaft two (705) fixedly connected to the front end of the long plate (602) is slidingly connected to the inside of each of the two plate twos (704), a pull spring (706) is sleeved outside each of the two shaft twos (705), a plate three (707) is fixedly connected to the front end of the horizontal plate (701) located at the front end of the sampling box two (4), a shaft three (708) is slidingly connected to the other end of the plate three (707), a plate four (709) is fixedly connected to the rear end of the shaft three (708), a protrusion (710) passing through the plate three (707) is fixedly connected to the outside of the shaft three (708), and a spring one (711) is sleeved outside the shaft three (708).
6. A multi-stage metering device for gas leakage according to claim 5, wherein: The limiting mechanism (8) includes a plurality of limiting shafts (801) fixedly connected inside the outer pipeline (1), a plurality of limiting blocks (802) are fixedly connected away from one side of the sampling box one (3) of the long plate (602), the short plate (601), and the cross plate (701), a plurality of limiting blocks (802) are respectively and slidably connected with a plurality of limiting shafts (801), two first supports (803) are respectively and fixedly connected with one end of a plurality of limiting shafts (801) close to the sampling box two (4), a spring two (804) is arranged outside the limiting shaft (801) between the limiting block (802) of one side of the cross plate (701) and the first support (803), and a plate five (805) is fixedly connected outside the limiting shaft (801) and is in contact with the rear end of the column one (703).