CN111486342B

CN111486342B - Anti-leakage natural gas closing device and using method thereof

Info

Publication number: CN111486342B
Application number: CN201910084690.6A
Authority: CN
Inventors: 程松民; 张甜; 郭海新; 罗斐; 曾璠雄; 邵新新; 刘平涛
Original assignee: Kunshan Energy Hunan Huanggang Liquefied Natural Gas Co ltd
Current assignee: Kunshan Energy Hunan Huanggang Liquefied Natural Gas Co ltd
Priority date: 2019-01-29
Filing date: 2019-01-29
Publication date: 2022-05-27
Anticipated expiration: 2039-01-29
Also published as: CN111486342A

Abstract

The invention discloses a leakage-proof natural gas closing device and a using method thereof, and relates to a natural gas closing device, which particularly comprises a transport vehicle, a vehicle plate and a natural gas storage tank, wherein in the natural gas leakage process, when natural gas leaks and is discharged from a gas outlet pipe, a gas sensor identifies that the natural gas leaks, a motor is firstly started through a controller, and after the motor is started for a period of time, the motor is meshed with a rack rod through a gear, the sealing performance is good, and the safety is increased; the air outlet pipe is blocked in a sealing oil outflow mode, and sealing oil can be automatically added when a leakage process occurs, so that the sealing time is prolonged, excessive addition of the sealing oil is reduced, and the resource waste is reduced; can cushion the transportation of natural gas storage tank through shock absorber support and produce and rock, improve natural gas storage tank transportation stability, reduce the skew possibility of valve and reduce through increasing natural gas storage tank stability to prevent to reveal the possibility increase.

Description

Anti-leakage natural gas closing device and using method thereof

Technical Field

The invention relates to a natural gas closing device, in particular to a leakage-proof natural gas closing device and a using method thereof.

Background

Natural gas refers to all gases naturally occurring in nature, including gases formed by various natural processes in the air space, water space and rock space (including oil field gas, gas field gas, mud volcanic gas, coal bed gas, biogenetic gas and the like). The definition of "natural gas" which has been common for a long time is a narrow definition from the energy point of view, and refers to a mixture of hydrocarbon and non-hydrocarbon gases which are naturally trapped in the formation. In petrogeology, oil field gas and gas field gas are commonly referred to. The composition is mainly hydrocarbon and contains non-hydrocarbon gas.

Current natural gas transportation transports through installing the natural gas storage tank on the transport vechicle, goes on the highway section of jolting, and the natural gas storage tank amplitude of rocking increases to cause the valve position to change, cause the natural gas to leak very easily, current closing device is through simply plugging up the outlet duct, and the leakproofness is relatively poor, causes the natural gas to leak very easily.

Disclosure of Invention

It is an object of the present invention to provide a leak-proof natural gas closure and method of use thereof to solve the problems set forth in the background above.

In order to achieve the purpose, the invention provides the following technical scheme:

a leakage-proof natural gas closing device comprises a transport vehicle, a vehicle plate and a natural gas storage tank, wherein the vehicle plate is mounted on the rear end face of the transport vehicle, and the upper surface of the vehicle plate is connected with the natural gas storage tank through a plurality of uniformly arranged damping supports; the bottom of the rear side surface of the natural gas storage tank is connected with an air outlet pipe, a box body is arranged outside the rear side surface of the natural gas storage tank, the lower end surface of the box body is connected with a plurality of supporting rods, a baffle plate is arranged below the box body, the rear end surface of the baffle plate is connected with the adjacent supporting rods, and a leakage-proof blocking mechanism is arranged on the baffle plate; the sealing oil is filled in the box body, the upper surface of the box body is communicated with a feeding hopper, one side surface of the bottom of the box body is connected with an L-shaped feeding pipe, the position, close to the center, of an air outlet pipe is communicated with an oil storage tank through a connecting pipe, the other end of the L-shaped feeding pipe penetrates through the upper surface of the oil storage tank and extends into the oil storage tank, an electric control valve is installed at the horizontal end of the L-shaped feeding pipe, a lifting rod is arranged inside the vertical end of the L-shaped feeding pipe, the bottom surface of the interior of the oil storage tank is connected with a limiting rod I, the other end of the limiting rod I is rotatably connected with a swing rod I through a pin shaft, one end of the swing rod I is connected with a floating ball, the other end of the swing rod I is rotatably connected with the lower end of the lifting rod through a pin shaft II, and the upper end of the lifting rod is fixedly connected with a sealing plug; and a gas sensor is arranged in one end of the gas outlet pipe close to the outlet, and a valve is arranged at the other end of the gas outlet pipe.

As a further scheme of the invention: the shock absorption bracket consists of a clamping plate, an arc-shaped frame, a pin shaft III and a swinging rod II, the slider is one, spring one, the U-shaped piece, slider two and spring two are constituteed, arc frame quantity is two, two arc frames set up and be connected with arcwall face down about the natural gas holding vessel symmetry, the inside sliding connection of arc frame has slider one, slider inboard side is connected with arc frame inside wall through spring one, the sweep upper surface is equipped with the spout the same with shock attenuation support quantity, the inside sliding connection of spout has two slider two about the natural gas holding vessel symmetry setting, two upper surface connections of slider have the U-shaped piece, the U-shaped piece is connected with swinging arms two through round pin axle three rotations, a slider lateral surface is connected with two parallel arrangement's splint, the other end and two splint rotations of swinging arms two are connected, the inside both sides wall of spout is connected with adjacent slider two through spring two respectively.

As a further scheme of the invention: prevent leaking blocking mechanism and comprise draw-in groove, fixture block, stopper, gear, rack bar and motor, and the motor is installed to the rear end face of baffle, and the motor output runs through the baffle and be connected with the gear, and the terminal surface is connected with the stopper before the baffle, and the inside of stopper is equipped with the dead slot, and the inside sliding connection of dead slot has the rack bar, rack bar and gear engagement, and the other end of rack bar is connected with the fixture block, and the another side of fixture block is equipped with outlet duct assorted draw-in groove.

As a further scheme of the invention: the rear end face of the baffle is also provided with a controller, the input end of the controller is electrically connected with the gas sensor, and the output end of the controller is respectively electrically connected with the motor and the electric control valve.

As a further scheme of the invention: the other side of the box body is connected with a U-shaped transparent tube.

As a further scheme of the invention: the dustproof plug is installed at the top of the feeding funnel, and the filtering cover is arranged inside the feeding funnel.

As a further scheme of the invention: the lower side surface of the sealing plug is connected with a first annular rubber pad, and the inner side wall of the clamping groove is connected with a second annular rubber pad.

A method of using a leak resistant natural gas closure, comprising the steps of:

the method comprises the following steps: in the natural gas storage process, the power supply of the controller is turned off by opening the valve, the height of the internal sealing oil of the box body is observed through the U-shaped transparent pipe, a proper amount of sealing oil is added, natural gas is introduced into the natural gas storage tank, the natural gas is confirmed to be completely introduced into the natural gas storage tank, the valve is closed, and the controller is turned on;

step two: in the natural gas leakage process, when the natural gas leaks and is discharged from the gas outlet pipe, the gas sensor identifies that the natural gas leaks, the controller controls the motor to be started first, after the motor is started for a period of time, the gear and the rack bar are engaged, thereby driving the rack rod to move, moving the clamping block to seal the air outlet pipe, closing the motor after starting for a period of time, finally opening the electric control valve, leading the sealing oil to flow into the L-shaped feeding pipe under the self gravity, so that the sealing oil flows into the oil storage tank, the sealing oil flows into the air outlet pipe to fill the space between the valve and the outlet of the air outlet pipe, when the content of the sealing oil reaches a proper height, the floating ball is driven to move upwards, the lifting rod is moved downwards through the lever principle, thereby drive the sealing plug and block up L shape inlet pipe to reduce the inside that sealing oil flowed into the batch oil tank all the time, thereby accomplish and seal the shutoff of outlet duct.

As a further scheme of the invention: the height of the added sealing oil in the first step is 20-25 cm, and the starting time of the motor in the second step is 5-7 s.

Compared with the prior art, the invention has the beneficial effects that:

1. the motor and the electric control valve are opened through intelligent control, the air outlet pipe is blocked mechanically and then is blocked by sealing oil, so that the leakage process is stopped rapidly, the sealing performance is good, and the safety is improved;

2. the air outlet pipe is blocked in a sealing oil outflow mode, and sealing oil can be automatically added when a leakage process occurs, so that the sealing time is prolonged, excessive addition of the sealing oil is reduced, and the resource waste is reduced;

3. can cushion the natural gas storage tank transportation through shock absorber support and produce and rock, improve natural gas storage tank transportation process stability, reduce the skew possibility reduction of valve through increasing natural gas storage tank stability to prevent to reveal the possibility increase.

Drawings

Fig. 1 is a schematic view of a leak resistant natural gas closure and method of use.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

Fig. 3 is an enlarged schematic view of a shock mount of the leak resistant natural gas closure apparatus and method of use thereof.

Fig. 4 is an enlarged schematic view of the baffle and the leak-resistant blocking mechanism of the leak-resistant natural gas closure apparatus and method of use thereof.

Fig. 5 is a control block diagram of a leak resistant natural gas shutoff apparatus and method of use thereof.

In the figure: the device comprises a transport vehicle 1, a vehicle plate 2, a natural gas storage tank 3, a shock absorption bracket 4, a gas outlet pipe 5, a valve 6, a baffle 7, a support rod 8, a U-shaped transparent pipe 9, sealing oil 10, an electric control valve 11, a box body 12, a feed hopper 13, an oil storage tank 14, a swinging rod I15, a floating ball 16, a connecting pipe 17, a pin I18, a sealing plug 19, a feed pipe 20L, a lifting rod 21, a pin II 22, a pin II 23, a gas sensor 24, a leakage-proof blocking mechanism 25, a clamping plate 40, an arc-shaped frame 41, a pin III 42, a sliding groove 43, a swinging rod II 44, a sliding block I45, a spring I46, a U-shaped block 47, a sliding block II, a spring II 49, a clamping groove 251, a clamping block 252, a limiting block 254, a hollow groove 255 gear and a 256 rack rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 5, in the embodiment of the invention, a leakage-proof natural gas closing device and a use method thereof comprise a transport vehicle 1, a vehicle plate 2 and a natural gas storage tank 3, wherein the vehicle plate 2 is mounted on the rear end face of the transport vehicle 1, and the upper surface of the vehicle plate 2 is connected with the natural gas storage tank 3 through a plurality of uniformly arranged damping supports 4; the bottom of the back side of the natural gas storage tank 3 is connected with an air outlet pipe 5, a box body 12 is arranged outside the back side of the natural gas storage tank 3, the lower end face of the box body 12 is connected with a plurality of support rods 8, a baffle 7 is arranged below the box body 12, the back end face of the baffle 7 is connected with the adjacent support rods 8, and a leakage-proof blocking mechanism 25 is arranged on the baffle 7; the sealing oil 10 is filled in the box body 12, the upper surface of the box body 12 is communicated with the feeding hopper 13, one side surface of the bottom of the box body 12 is connected with an L-shaped feeding pipe 20, the position, close to the center, of the air outlet pipe 5 is communicated with the oil storage tank 14 through a connecting pipe 17, the other end of the L-shaped feeding pipe 20 penetrates through the upper surface of the oil storage tank 14 and extends into the oil storage tank 14, an electric control valve 11 is installed at the horizontal end of the L-shaped feeding pipe 20, a lifting rod 21 is arranged inside the vertical end of the L-shaped feeding pipe 20, the bottom surface inside the oil storage tank 14 is connected with a limiting rod 23, the other end of the limiting rod 23 is rotatably connected with a first oscillating rod 15 through a first pin shaft 18, one end of the first oscillating rod 15 is connected with a floating ball 16, the other end of the first oscillating rod 15 is rotatably connected with the lower end of the lifting rod 21 through a second pin shaft 22, and the upper end of the lifting rod 21 is fixedly connected with a sealing plug 19; a gas sensor 24 is arranged in one end of the gas outlet pipe 5 close to the outlet, a valve 6 is arranged at the other end of the gas outlet pipe 5,

the damping support 4 comprises clamping plates 40, arc-shaped frames 41, a pin shaft three 42, a swing rod two 44, a slide block one 45, a spring one 46, a U-shaped block 47, a slide block two 48 and a spring two 49, the number of the arc-shaped frames 41 is two, the two arc-shaped frames 41 are symmetrically arranged about the natural gas storage tank 3 and are connected with a lower arc-shaped surface, the inside of the arc-shaped frame 41 is connected with the slide block one 45 in a sliding manner, the lower side surface of the slide block one 45 is connected with the lower inner side wall of the arc-shaped frame 41 through the spring one 46, the upper surface of the vehicle plate 2 is provided with slide grooves 43 with the same number as that of the damping support 4, the inside of the slide grooves 43 is connected with the slide block two 48 symmetrically arranged about the natural gas storage tank 3 in a sliding manner, the upper surface of the slide block two 48 is connected with the U-shaped block 47, the U-shaped block 47 is rotatably connected with the swing rod two 44 through the pin shaft three 42, the outer side surface of the slide block one 45 is connected with the two clamping plates 40 arranged in parallel, the other end of the swing rod two clamping plates 40 is rotatably connected with the two clamping plates 40, two side walls inside the sliding groove 43 are respectively connected with the adjacent second sliding blocks 48 through a second spring 49,

the anti-leakage blocking mechanism 25 comprises a clamping groove 251, a clamping block 252, a limiting block 253, a gear 255, a rack bar 256 and a motor, the motor is installed on the rear end face of the baffle 7, the output end of the motor penetrates through the baffle 7 and is connected with the gear 255, the front end face of the baffle 7 is connected with the limiting block 253, a hollow groove 254 is formed in the limiting block 253, the rack bar 256 is slidably connected in the hollow groove 254, the rack bar 256 is meshed with the gear 255, the clamping block 252 is connected to the other end of the rack bar 256, the clamping groove 251 matched with the air outlet pipe 5 is formed in the other side face of the clamping block 252,

the rear end face of the baffle 7 is also provided with a controller, the input end of the controller is electrically connected with the gas sensor 24, the output end of the controller is respectively electrically connected with the motor and the electric control valve 11,

the other side of box 12 is connected with the U-shaped transparent pipe, and the content of the inside sealing oil 10 of box 12 can be observed to the U-shaped transparent pipe, and sealing oil 10 adopts vegetable oil.

The dustproof plug is installed at the top of feed hopper 13, and feed hopper 13 is inside to be equipped with the filter mantle, makes to add through the filter mantle and seals oil and play the filter effect, reduces impurity and sneaks into the possibility, and this patent relates to the circuit and the control is prior art.

The lower side surface of the sealing plug 19 is connected with a first annular rubber pad, and the inner side wall of the clamping groove 251 is connected with a second annular rubber pad.

the method comprises the following steps: in the natural gas storage process, the power supply of the controller is turned off by opening the valve 6, the height of the internal sealing oil 10 of the box body 12 is observed through the U-shaped transparent pipe 9, a proper amount of sealing oil 10 is added, natural gas is introduced into the natural gas storage tank 3, the natural gas is confirmed to be completely introduced into the natural gas storage tank 3, the valve 6 is closed, and the controller is turned on;

step two: in the process of natural gas leakage, when natural gas leaks and is discharged from the gas outlet pipe 5, the gas sensor 24 recognizes that the natural gas leaks, the controller controls the motor to be started first, after the motor is started for a period of time, the rack bar 256 is driven to move through the meshing action of the gear 255 and the rack bar 256, the clamping block 252 is moved to seal the gas outlet pipe 5, the motor is started for a period of time and then is closed, finally, the electric control valve 11 is started, the sealing oil 10 flows into the L-shaped feeding pipe 20 under the self gravity, and then flows into the oil storage tank 14, the sealing oil 10 flows into the gas outlet pipe 5 all the time, the space between the valve 6 and the outlet of the gas outlet pipe 5 is filled, when the content of the sealing oil 10 reaches a proper height, the floating ball 16 is driven to move upwards, the lifting rod 21 is moved downwards through the lever principle, so that the sealing plug 19 is driven to block the L-shaped feeding pipe 20, and then the sealing oil 10 is reduced to flow into the oil storage tank 14 all the time, thereby completing the blocking and sealing of the air outlet pipe 5,

the height of the added sealing oil in the first step is 20 cm, and the starting time of the motor in the second step is 5 s.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A leakage-proof natural gas closing device comprises a transport vehicle (1), a vehicle plate (2) and a natural gas storage tank (3), and is characterized in that the vehicle plate (2) is installed on the rear end face of the transport vehicle (1), and the upper surface of the vehicle plate (2) is connected with the natural gas storage tank (3) through a plurality of uniformly arranged shock absorption supports (4); the bottom of the rear side face of the natural gas storage tank (3) is connected with an air outlet pipe (5), a box body (12) is arranged outside the rear side face of the natural gas storage tank (3), the lower end face of the box body (12) is connected with a plurality of supporting rods (8), a baffle plate (7) is arranged below the box body (12), the rear end face of the baffle plate (7) is connected with the adjacent supporting rods (8), and a leakage-proof blocking mechanism (25) is arranged on the baffle plate (7); the sealing oil (10) is filled in the box body (12), the upper surface of the box body (12) is communicated with a feeding hopper (13), one side surface of the bottom of the box body (12) is connected with an L-shaped feeding pipe (20), the air outlet pipe (5) is close to the central position and is communicated with an oil storage tank (14) through a connecting pipe (17), the other end of the L-shaped feeding pipe (20) penetrates through the upper surface of the oil storage tank (14) and extends into the oil storage tank (14), an electric control valve (11) is installed at the horizontal end of the L-shaped feeding pipe (20), a lifting rod (21) is arranged inside the vertical end of the L-shaped feeding pipe (20), the bottom surface of the inside of the oil storage tank (14) is connected with a limiting rod (23), the other end of the limiting rod (23) is rotatably connected with a first swinging rod (15) through a first pin shaft (18), one end of the first swinging rod (15) is connected with a floating ball (16), the other end of the first swinging rod (15) is rotatably connected with the lower end of the lifting rod (21) through a second pin shaft (22), the upper end of the lifting rod (21) is fixedly connected with a sealing plug (19); a gas sensor (24) is arranged in one end of the gas outlet pipe (5) close to the outlet, and a valve (6) is arranged at the other end of the gas outlet pipe (5).

2. An anti-leakage natural gas closing device according to claim 1, wherein the damping bracket (4) is composed of a clamping plate (40), two arc frames (41), a pin shaft three (42), a swing lever two (44), a slider one (45), a spring one (46), a U-shaped block (47), a slider two (48) and a spring two (49), the two arc frames (41) are symmetrically arranged about the natural gas storage tank (3) and connected with the lower arc surface, the inside of the arc frame (41) is slidably connected with the slider one (45), the lower side surface of the slider one (45) is connected with the lower inner side wall of the arc frame (41) through the spring one (46), the upper surface of the vehicle plate (2) is provided with sliding grooves (43) with the same number as the damping bracket (4), the inside of the sliding grooves (43) is slidably connected with the slider two (48) symmetrically arranged about the natural gas storage tank (3), the upper surface of the second sliding block (48) is connected with a U-shaped block (47), the U-shaped block (47) is rotatably connected with a second swinging rod (44) through a third pin shaft (42), the outer side surface of the first sliding block (45) is connected with two clamping plates (40) which are arranged in parallel, the other end of the second swinging rod (44) is rotatably connected with the two clamping plates (40), and two inner side walls of the sliding groove (43) are respectively connected with the second adjacent sliding block (48) through a second spring (49).

3. A leakage-proof natural gas closing device according to claim 1, wherein the leakage-proof blocking mechanism (25) is composed of a clamping groove (251), a clamping block (252), a limiting block (253), a gear (255), a rack bar (256) and a motor, the motor is installed on the rear end face of the baffle (7), the output end of the motor penetrates through the baffle (7) and is connected with the gear (255), the limiting block (253) is connected on the front end face of the baffle (7), an empty groove (254) is formed inside the limiting block (253), the rack bar (256) is slidably connected inside the empty groove (254), the rack bar (256) is meshed with the gear (255), the clamping block (252) is connected to the other end of the rack bar (256), and a clamping groove (251) matched with the gas outlet pipe (5) is formed in the other side face of the clamping block (252).

4. A leak-proof natural gas shut-off device according to claim 3, characterized in that a controller is further installed on the rear end face of the baffle (7), the input end of the controller is electrically connected with the gas sensor (24), and the output end of the controller is electrically connected with the motor and the electrically controlled valve (11), respectively.

5. A leak resistant natural gas closure as claimed in claim 1, wherein a U-shaped transparent tube is connected to the other side of the tank (12).

6. Leak-proof natural gas closure device according to claim 1, characterized in that the top of the feed hopper (13) is fitted with a dust plug and inside the feed hopper (13) is provided with a filter mantle.

7. A leak-proof natural gas shut-off device according to claim 4, characterized in that a first annular rubber gasket is attached to the lower side of the sealing plug (19), and a second annular rubber gasket is attached to the inner side wall of the groove (251).

8. Use of a leak resistant natural gas closure apparatus as in any one of claims 1-7, comprising the steps of:

the method comprises the following steps: in the natural gas storage process, the power supply of the controller is turned off by opening the valve (6), the height of the internal sealing oil (10) of the box body (12) is observed through the U-shaped transparent pipe (9), a proper amount of sealing oil (10) is added, natural gas is introduced into the natural gas storage tank (3), the natural gas is confirmed to be completely introduced into the natural gas storage tank (3), the valve (6) is closed, and the controller is turned on;

step two: in the natural gas leakage process, when natural gas leaks and is discharged from the gas outlet pipe (5), the gas sensor (24) identifies that the natural gas leaks, the controller controls the motor to be started firstly, after the motor is started for a period of time, the gear (255) and the rack rod (256) are meshed, so that the rack rod (256) is driven to move, the clamping block (252) moves to seal the gas outlet pipe (5), the motor is started for a period of time and then is closed, finally, the electric control valve (11) is started, the sealing oil (10) flows into the L-shaped feeding pipe (20) under the action of self gravity, so that the sealing oil flows into the oil storage tank (14), the sealing oil (10) flows into the gas outlet pipe (5) all the time to fill the space between the valve (6) and the outlet of the gas outlet pipe (5), when the content of the sealing oil (10) reaches a proper height, the floating ball (16) is driven to move upwards, and the floating ball (21) is moved downwards through the lever principle, thereby driving the sealing plug (19) to block the L-shaped feeding pipe (20), reducing the sealing oil (10) to flow into the oil storage tank (14) all the time, and completing the blocking and sealing of the air outlet pipe (5).

9. A method of using a leak resistant natural gas shut off device, as in claim 8, wherein the seal oil added in step one is at a height of 20-25 cm and the motor on time in step two is 5-7 s.