阅读说明：本技术 一种天然气加注计量装置 (Natural gas filling metering device ) 是由 骆东生 康迂星 于 2021-07-06 设计创作，主要内容包括：本发明涉及天然气技术领域,且公开了一种天然气加注计量装置,包括支撑机构,所述支撑机构的顶部安装有计量机构,所述支撑装置的顶部安装有储存装置；所述计量机构包括固定箱,所述固定箱的右侧安装有操作盘,所述固定箱的右侧固定连接有显示装置,所述固定箱的正面固定连接有支撑架,所述支撑架的内部滑动连接有加气枪,所述固定箱的正面固定连接有第一固定管,所述第一固定管的外壁安装有第二固定管,所述第一计量装置的正面安装有第一安装头,所述第一安装头的内部安装有第三固定管,所述固定板的底部固定连接有弹簧,所述内管的底部滑动连接有外管。该天然气加注计量装置,具备方便对计量装置进行安装,方便进行控制静电带来的危害等优点。(The invention relates to the technical field of natural gas and discloses a natural gas filling metering device which comprises a supporting mechanism, wherein a metering mechanism is installed at the top of the supporting mechanism, and a storage device is installed at the top of the supporting mechanism; metering mechanism includes fixed case, the operation panel is installed on the right side of fixed case, the right side fixedly connected with display device of fixed case, the positive fixedly connected with support frame of fixed case, the inside sliding connection of support frame has the air gun, the first fixed pipe of positive fixedly connected with of fixed case, the fixed pipe of second is installed to the outer wall of first fixed pipe, first installation head is installed in first metering device's front, the internally mounted of first installation head has the fixed pipe of third, the bottom fixedly connected with spring of fixed plate, the bottom sliding connection of inner tube has the outer tube. This natural gas filling metering device possesses the convenience and installs metering device, conveniently controls advantages such as harm that static brought.)

1. The utility model provides a natural gas filling metering device which characterized in that: the device comprises a supporting mechanism (1), wherein a metering mechanism (2) is installed at the top of the supporting mechanism (1), and a storage device (3) is installed at the top of the supporting device (1);

the metering mechanism (2) comprises a fixed box (201), an operating panel (202) is installed on the right side of the fixed box (201), a display device (203) is fixedly connected to the right side of the fixed box (201), a supporting frame (204) is fixedly connected to the front side of the fixed box (201), an air gun (205) is connected to the inside of the supporting frame (204) in a sliding mode, a first fixed pipe (206) is fixedly connected to the front side of the fixed box (201), a second fixed pipe (207) is installed on the outer wall of the first fixed pipe (206), a first metering device (208) is fixedly connected to the front side of the second fixed pipe (207), a first installing head (209) is installed on the front side of the first metering device (208), a third fixed pipe (210) is installed inside the first installing head (209), and a sliding block (212) is fixedly connected to the bottom of the first metering device (208), the outer wall sliding connection of slider (212) has slide groove body (211), the front sliding connection of slider (212) has the card body (213), the bottom fixedly connected with fixed plate (214) of the card body (213), the front fixedly connected with clamp plate (215) of fixed plate (214), the bottom fixedly connected with inner tube (216) of fixed plate (214), the bottom fixedly connected with spring (217) of fixed plate (214), the bottom sliding connection of inner tube (216) has outer tube (218).

2. A natural gas filling metering device according to claim 1, characterized in that: the supporting device (1) comprises a base (101), a shock absorption pad (102) is fixedly connected to the top of the base (101), the shock absorption pad (102) is a rubber shock absorption pad, a fixing groove (103) is formed in the base (101), and the fixing groove (103) is connected with a spring (217) in a sliding mode.

3. A natural gas filling metering device according to claim 2, characterized in that: the fixing groove (103) is connected with the inner pipe (216) in a sliding mode, the fixing groove (103) is connected with the outer pipe (218) in a fixed mode, the fixing groove (103) is connected with the pressing plate (215) in a sliding mode, and the sliding groove body (103) is connected with the fixing plate (214) in a sliding mode.

4. A natural gas filling metering device according to claim 1, characterized in that: the storage device (3) comprises a protective box (301), wherein a tripod (302) is fixedly connected to the interior of the protective box (301), supporting blocks (303) are fixedly connected to the interior of the protective box (301), the number of the supporting blocks (303) is at least ten, and the number of the tripod (302) is at least six.

5. A natural gas filling metering device according to claim 4, characterized in that: the outer wall fixedly connected with box (304) of supporting shoe (303), the inside fixedly connected with liquid level detection device (305) of box (304), the quantity of liquid level detection device (305) is three at least, the inside fixedly connected with pressure detection device (306) of box (304).

6. A natural gas filling metering device according to claim 5, characterized in that: the number of the pressure detection devices (306) is at least three, the inside of the box body (304) is fixedly connected with a connecting pipe (307), the bottom of the connecting pipe (307) is fixedly connected with a liquefying mechanism (308), the bottom of the liquefying mechanism (308) is fixedly connected with a pressurizing device (309), and the inside of the box body (304) is fixedly connected with a temperature detection device.

7. A natural gas filling metering device according to claim 6, characterized in that: the top of the connecting pipe (307) is fixedly connected with a second metering device (310), the top of the second metering device (310) is provided with an explosion-proof cover (311), the top of the explosion-proof cover (311) is fixedly connected with an inlet pipe (312), and a first electric control valve (313) is arranged inside the inlet pipe (312).

8. A natural gas filling metering device according to claim 5, characterized in that: the protection box comprises a protection box body (301), and is characterized in that a static electricity removing device (314) is fixedly connected to the top of the protection box body (301), a static electricity removing rod (315) is fixedly connected to the bottom of the static electricity removing device (314), partition plates (316) are fixedly connected to the inside of the box body (304), and the number of the partition plates (316) is at least two.

9. A natural gas filling metering device according to claim 8, characterized in that: the inside fixedly connected with pipe (317) of baffle (316), the inside rotation of pipe (317) is connected with ball valve (318), second automatically controlled valve (319) is installed at the top of ball valve (318), the right side fixedly connected with output mechanism (320) of guard box (301).

10. A natural gas filling metering device according to claim 1, characterized in that: the C-shaped chute body of the chute body (211), the spring (217) is in sliding connection with the inner tube (216), the spring (217) is in sliding connection with the outer tube (218), and the clamping body (213) is a conical clamping body with a cutting inclined plane.

Technical Field

The invention relates to the technical field of natural gas, in particular to a natural gas filling metering device.

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, and the definition of "natural gas" which has been commonly used for a long time is a narrow definition from the viewpoint of energy, and refers to a mixture of hydrocarbons and non-hydrocarbon gases naturally existing in the stratum, and in petrogeology, generally refers to oil field gas and gas field gas, and the composition of the natural gas mainly refers to hydrocarbons and contains non-hydrocarbon gases.

At present, natural gas is widely applied to production and life, but a natural gas filling metering device has some defects, a gas-liquid separator is disclosed in a liquefied natural gas filling station of Chinese patent CN201110102061.5, so that the density difference between gas phase and liquid phase of the natural gas can be utilized to carry out gas-liquid separation, the natural gas entering a liquid filling pipeline is ensured to be completely liquid, the filling pressure is reduced, the problems of gas-liquid separation, initial start precooling, precooling control and the like are solved, normal pressure or low pressure gas filling is realized, a real-time monitoring system is adopted to carry out real-time monitoring on the pressure, the temperature and the system tightness of an LNG storage tank, the system can automatically alarm and carry out emergency treatment after abnormity is found, the reliability and the safety of the system operation are improved, a filling metering system consisting of a gas filling controller, a first pressure sensor, a gas filling gun and a flow meter is adopted, accurate measurement and real-time display of gas filling amount and gas return amount are achieved, and therefore measurement accuracy is improved, however, the gas filling measurement device is inconvenient to install in the comparison file, and harm caused by static electricity is inconvenient to control, and therefore the natural gas filling measurement device is provided to solve the problems.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the natural gas filling metering device which has the advantages of convenience in installation of the filling metering device, convenience in control of hazards caused by static electricity and the like, and solves the problems that the filling metering device is inconvenient to install and hazards caused by static electricity are inconvenient to control.

(II) technical scheme

In order to realize the purposes of conveniently installing the filling metering device and conveniently controlling the damage caused by static electricity, the invention provides the following technical scheme: a natural gas filling metering device comprises a supporting mechanism, wherein a metering mechanism is installed at the top of the supporting mechanism, and a storage device is installed at the top of the supporting mechanism;

the metering mechanism comprises a fixed box, an operating panel is installed on the right side of the fixed box, a display device is fixedly connected on the right side of the fixed box, a support frame is fixedly connected on the front side of the fixed box, an air gun is connected in the support frame in a sliding manner, a first fixed pipe is fixedly connected on the front side of the fixed box, a second fixed pipe is installed on the outer wall of the first fixed pipe, a first metering device is fixedly connected on the front side of the second fixed pipe, a first mounting head is installed on the front side of the first metering device, a third fixed pipe is installed in the first mounting head, a slide block is fixedly connected at the bottom of the first metering device, a slide groove body is slidably connected on the outer wall of the slide block, a clamping body is slidably connected on the front side of the slide block, a fixed plate is fixedly connected at the bottom of the clamping body, and a pressing plate is fixedly connected on the front side of the fixed plate, the bottom fixedly connected with inner tube of fixed plate, the bottom fixedly connected with spring of fixed plate, the bottom sliding connection of inner tube has the outer tube.

Further, strutting arrangement includes the base, the top fixedly connected with shock pad of base, the shock pad is the rubber shock pad, the fixed slot has been seted up to the inside of base, fixed slot and spring sliding connection.

Further, fixed slot and inner tube sliding connection, fixed slot and outer tube fixed connection, fixed slot and clamp plate sliding connection, the spout body and fixed plate sliding connection.

Further, storage device includes the protective housing, the inside fixedly connected with tripod of protective housing, the inside fixedly connected with supporting shoe of protective housing, the quantity of supporting shoe is ten at least, the quantity of tripod is six at least.

Further, the outer wall fixedly connected with box of supporting shoe, the inside fixedly connected with liquid level detection device of box, the quantity of liquid level detection device is three at least, the inside fixedly connected with pressure detection device of box.

Furthermore, the number of the pressure detection devices is at least three, the inside of the box body is fixedly connected with a connecting pipe, the bottom of the connecting pipe is fixedly connected with a liquefying mechanism, the bottom of the liquefying mechanism is fixedly connected with a pressurizing device, and the inside of the box body is fixedly connected with a temperature detection device.

Further, the top fixedly connected with second metering device of connecting pipe, explosion-proof cover is installed at the top of second metering device, the top fixedly connected with of explosion-proof cover advances the pipe, the internally mounted who advances the pipe has first automatically controlled valve.

Further, the top fixedly connected with of guard box destatics the device, destatic device's bottom fixedly connected with destatics the pole, the inside fixedly connected with baffle of box, the quantity of baffle is two at least.

Further, the inside fixedly connected with pipe of baffle, the inside rotation of pipe is connected with the ball valve, the second automatically controlled valve is installed at the top of ball valve, the right side fixedly connected with output mechanism of guard box.

Further, the C-shaped chute body of the chute body is characterized in that the spring is in sliding connection with the inner tube, the spring is in sliding connection with the outer tube, and the clamping body is a conical clamping body for cutting an inclined plane.

(III) advantageous effects

Compared with the prior art, the invention provides a natural gas filling metering device, which has the following beneficial effects:

1. this natural gas filling metering device, install on supporting mechanism through metering mechanism, then drive first metering device through the slider and extrude the card body, the slider slides and extrudees along the inclined plane of the card body, and then make the card body exert pressure downwards fixed plate and inner tube, then compress the spring through the fixed plate, make the inner tube flexible inner wall at the outer tube, and then make the slider get into the inner wall of chute body and install, make the flexible inner tube that drives of spring stretch out the outer tube, block the slider by the card body, and then made things convenient for and installed metering mechanism.

2. This metering device is annotated to natural gas destatics through the static-removing device on the storage device, eliminates the static of box inside through static-removing device and the static-removing rod on the protecting box, and then has made things convenient for the safety to the box inside to guarantee, conveniently controls the harm that static brought.

Drawings

Fig. 1 is a schematic structural diagram of a natural gas filling metering device according to the present invention;

FIG. 2 is a right side view of a structure of a natural gas filling metering device according to the present invention;

fig. 3 is a left side view of a card body of a natural gas filling metering device structure according to the present invention;

FIG. 4 is a partially enlarged schematic view of part A of the FIG. 1 illustrating a natural gas filling metering device according to the present invention;

fig. 5 is a partially enlarged schematic view of a portion B shown in fig. 1 of a natural gas filling and metering device according to the present invention.

In the figure: the device comprises a supporting mechanism 1, a base 101, a shock absorption pad 102, a 103 fixing groove, a 2 metering mechanism, a 201 fixing box, a 202 operating panel, a 203 display device, a 204 support frame, a 205 air gun, a 206 first fixing pipe, a 207 second fixing pipe, a 208 first metering device, a 209 first mounting head, a 210 third fixing pipe, a 211 sliding chute body, a 212 sliding block, a 213 clamping body, a 214 fixing plate, a 215 pressing plate, a 216 inner pipe, a 217 spring, a 218 outer pipe, a 3 storage device, a 301 protection box, a 302 tripod, a 303 supporting block, a 304 box body, a 305 liquid level detection device, a 306 pressure detection device, a 307 connecting pipe, a 308 liquefaction mechanism, a 309 pressurization device, a 310 second metering device, a 311 explosion-proof cover, a 312 inlet pipe, a 313 first electric control valve, a 314 static electricity removal device, a 315 static electricity removal rod, a 316 partition board, a 317 conduit, an 318 ball valve, a 319 second electric control valve and a 320 output mechanism.

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. 1-5, the natural gas filling metering device in the present embodiment includes a supporting mechanism 1, a metering mechanism 2 is installed at the top of the supporting mechanism 1, and a storage device 3 is installed at the top of the supporting mechanism 1;

the metering mechanism 2 comprises a fixed box 201, an operation panel 202 is installed on the right side of the fixed box 201, a display device 203 is fixedly connected on the right side of the fixed box 201, a support frame 204 is fixedly connected on the front side of the fixed box 201, an air gun 205 is slidably connected inside the support frame 204, a first fixed pipe 206 is fixedly connected on the front side of the fixed box 201, a second fixed pipe 207 is installed on the outer wall of the first fixed pipe 206, a first metering device 208 is fixedly connected on the front side of the second fixed pipe 207, a first mounting head 209 is installed on the front side of the first metering device 208, a fixed groove 103 is slidably connected with an inner pipe 216, the fixed groove 103 is fixedly connected with an outer pipe 218, the fixed groove 103 is slidably connected with a pressing plate 215, a chute body 103 is slidably connected with a fixed plate 214, the fixed groove 103 facilitates installation of the outer pipe 218 and a spring 217, the inner pipe 216 and the outer pipe 218 facilitate vertical extension and retraction of the spring 217, a third mounting head 210 is installed inside the first mounting head 209, the natural gas is extracted by a power device in the fixed box 201 and passes through the first metering device 208 and the third fixed pipe 210, and then is discharged by the gas filling gun 205, then the quantity is displayed by the display device 203, and the operation panel 202 is controlled and operated, the bottom of the first metering device 208 is fixedly connected with the slide block 212, the outer wall of the supporting block 303 is fixedly connected with the box body 304, the inside of the box body 304 is fixedly connected with the liquid level detection device 305, the quantity of the liquid level detection device 305 is at least three, the liquid level detection device 305 facilitates the detection of the quantity of the liquefied natural gas at two sides of the partition plate 316, the inside of the box body 304 is fixedly connected with the pressure detection device 306, the liquid level detection device 305 facilitates the detection of the liquid level of the natural gas in the box body 304, and then the quantity of the natural gas, the pressure detection device 306 facilitates the detection of the pressure in the box body 304, the slide block 212 is convenient for driving the first metering device 208 to slide, the outer wall of the slide block 212 is slidably connected with a slide groove body 211, the front surface of the slide block 212 is slidably connected with a clamp body 213, the bottom of the clamp body 213 is fixedly connected with a fixing plate 214, the C-shaped slide groove body of the slide groove body 211, a spring 217 is slidably connected with an inner tube 216, the spring 217 is slidably connected with an outer tube 218, the clamp body 213 is a tapered clamp body with a cut inclined surface, the slide groove body 211 is convenient for mounting the first metering device 208, the clamp body 213 is convenient for limiting the slide block 212, the front surface of the fixing plate 214 is fixedly connected with a pressing plate 215, the bottom of the fixing plate 214 is fixedly connected with the inner tube 216, the top of the connecting tube 307 is fixedly connected with a second metering device 310, the top of the second metering device 310 is provided with an explosion-proof cover 311, the top of the explosion-proof cover 311 is fixedly connected with an inlet tube 312, the first electric control valve 313 is arranged inside the inlet tube 312, the explosion-proof cover 311 is convenient for preventing explosion of the box body 304, the first control valve 313 facilitates controlling the penetration and closing of the inlet pipe 312, the second metering device 310 facilitates metering natural gas into the box body 304, the right side of the inlet pipe 312 is movably connected with an installation body, the bottom of the fixing plate 214 is fixedly connected with the spring 217, the bottom of the inner pipe 216 is slidably connected with the outer pipe 218, natural gas enters through the inlet pipe 312, the first electric control valve 313 on the inlet pipe 312 controls the opening and closing of the inlet pipe, the natural gas is metered through the explosion-proof cover 311 and the second metering device 310, then enters the liquefying mechanism 308 through the connecting pipe 307 to be liquefied, enters the pressurizing device 309 through the liquefying mechanism 308 to be pressurized, then enters the inside of the box body 304, then the state of the natural gas is detected through the liquid level detection device 305 and the temperature detection device, the pressure inside the box body 304 is detected through the pressure detection device 306, and then the box body 304 is protected through the protection box 301, the triangular support 302 and the supporting block 303 support the box body 304 to further support and protect the box body 304, static electricity inside the box body 304 is eliminated through the static electricity eliminating device 314 and the static electricity eliminating rod 315 on the protecting box 301, safety inside the box body 304 is further conveniently guaranteed, the box body 304 is stored in a segmented mode through a partition plate 316 inside the box body 304, natural gas is further conveniently protected in a segmented mode, safety of the box body 301 is improved, a guide pipe 317 inside the partition plate 316 is communicated, a ball valve 318 and a second electric control valve 319 on the guide pipe 317 are used for isolating and communicating natural gas, conveying of natural gas is further facilitated, the natural gas is conveyed to the inside of the fixing box 201 in a vaporized mode through the conveying mechanism 320, then the sliding block 212 drives the first metering device 208 to extrude the clamping body 213, the sliding block 212 slides and extrudes along the inclined plane of the clamping body 213, further, the fixing plate 214 and the inner tube 216 are pressed downwards by the clamp body 213, then the spring 217 is compressed by the fixing plate 214, the inner tube 216 is stretched and contracted on the inner wall of the outer tube 218, further the slider 212 enters the inner wall of the chute body 211 to be installed, the spring 217 stretches and contracts to drive the inner tube 216 to extend out of the outer tube 218, the slider 212 is blocked by the clamp body 213, similarly, the pressing plate 215 on the fixing plate 214 is pressed, the clamp body 213 moves downwards, the slider 212 slides out of the chute body 211, further the first metering device 208 is disassembled, then the second fixing tube 207 on the first metering device 208 is butted with the first fixing tube 206 on the fixing box 201, the nut is in threaded connection, the first installing head 209 on the first metering device 208 is in threaded connection with the third fixing tube 210, the first metering device 208 and the gas filling gun 205 are installed conveniently, the gas filling gun 205 is placed on the top of the supporting frame 204 to be supported, then draw the natural gas through first metering device 208 and the fixed pipe 210 of third through the inside power device of fixed case 201, and then discharge by air gun 205, then show quantity through display device 203 to and operation panel 202 controls and operates, made things convenient for and installed metering mechanism, conveniently control the harm that static brought.

In this embodiment, the supporting device 1 includes the base 101, the top fixedly connected with shock pad 102 of base 101, and the shock pad 102 is the rubber shock pad, and fixed slot 103 has been seted up to the inside of base 101, fixed slot 103 and spring 217 sliding connection, and the supporting device 1 not only supports metering mechanism 2, still is used for supporting storage device 3.

In this embodiment, the storage device 3 includes the protective box 301, and the protective box 301 has made things convenient for and has protected box 304, and the inside fixedly connected with tripod 302 of protective box 301, the inside fixedly connected with supporting shoe 303 of protective box 301, the quantity of supporting shoe 303 is ten at least, and the quantity of tripod 302 is six at least, and tripod 302 and supporting shoe 303 have made things convenient for the form to box 304 to support, and then have made things convenient for to support and protect box 304.

In this embodiment, the number of pressure detection devices 306 is at least three, the inside fixedly connected with connecting pipe 307 of box 304, the bottom fixedly connected with liquefaction mechanism 308 of connecting pipe 307, the bottom fixedly connected with pressure device 309 of liquefaction mechanism 308, the inside fixedly connected with temperature-detecting device of box 304, liquefaction mechanism 308 has made things convenient for and has carried out low temperature liquefaction to the natural gas, pressure device 309 has made things convenient for and has pressurized the natural gas, pressure device 309 makes things convenient for the natural gas to annotate to the inside of box 304, connecting pipe 307 has made things convenient for intercommunication second metering device 310 and liquefaction mechanism 308.

In this embodiment, the top fixedly connected with of guard box 301 destatics device 314, destatics device 314's bottom fixedly connected with destatics pole 315, the inside fixedly connected with baffle 316 of box 304, the quantity of baffle 316 is two at least, destatics device 314 and destatics pole 315 eliminate the inside static of box 304, and then made things convenient for the safety to the box 304 is inside to be ensured, and baffle 316 has made things convenient for and has supported destatics pole 315.

In this embodiment, the inside fixedly connected with pipe 317 of baffle 316, pipe 317's inside is rotated and is connected with ball valve 318, second electric control valve 319 is installed at ball valve 318's top, the right side fixedly connected with output mechanism 320 of guard box 301, baffle 316 has made things convenient for the natural gas to the box 304 inside to carry out the segmentation protection, and then the security of storing has been improved, second electric control valve 319 and ball valve 318 have made things convenient for to link up and keep apart pipe 317, and then the transport and the guard effect of natural gas have been improved, conveying mechanism 318 has made things convenient for the liquefied natural gas to the box 304 inside to vaporize.

The working principle of the above embodiment is as follows:

the natural gas enters through the inlet pipe 312, is controlled to open and close by the first electric control valve 313 on the inlet pipe 312, is metered by the explosion-proof cover 311 and the second metering device 310, enters the liquefying mechanism 308 through the connecting pipe 307 to be liquefied, enters the pressurizing device 309 through the liquefying mechanism 308 to be pressurized, enters the box body 304, detects the state of the natural gas through the liquid level detecting device 305 and the temperature detecting device, detects the pressure inside the box body 304 through the pressure detecting device 306, protects the box body 304 through the protecting box 301, supports the shape of the box body 304 through the tripod 302 and the supporting block 303 to further support and protect the box body 304, eliminates the static electricity inside the box body 304 through the static electricity eliminating device 314 and the static electricity eliminating rod 315 on the protecting box 301, and further facilitates the safety guarantee of the inside of the box body 304, then the box body 304 is stored in a segmented manner through the partition plate 316 in the box body 304, thereby facilitating the segmented protection of natural gas, improving the safety of the box body 301, communicating the natural gas through the conduit 317 in the partition plate 316, isolating and communicating the natural gas through the ball valve 318 and the second electric control valve 319 on the conduit 317, further facilitating the transportation of the natural gas, then vaporizing and transporting the natural gas to the inside of the fixed box 201 through the transportation mechanism 320, then driving the first metering device 208 to extrude the clamp body 213 through the slider 212, sliding and extruding the slider 212 along the inclined surface of the clamp body 213, further enabling the clamp body 213 to downwards apply pressure to the fixed plate 214 and the inner tube 216, then compressing the spring 217 through the fixed plate 214, enabling the inner tube 216 to stretch out and draw back on the inner wall of the outer tube 218, further enabling the slider 212 to enter the inner wall of the chute body 211 for installation, enabling the spring 217 to stretch out and drive the inner tube 216 to stretch out of the outer tube 218, the sliding block 212 is blocked by the block body 213, and similarly, the pressing plate 215 on the fixing plate 214 is pressed, so that the block body 213 moves downwards, so that the sliding block 212 slides out of the sliding groove body 211, and the first metering device 208 is disassembled, and then the second fixing pipe 207 on the first metering device 208 is butted with the first fixing pipe 206 on the fixing box 201, and the nut is screwed, and the first mounting head 209 and the third fixing pipe 210 on the first metering device 208 are screwed, so that the first metering device 208 and the air gun 205 are convenient to mount, the air gun 205 is placed on the top of the supporting frame 204 for supporting, natural gas is extracted by the power device in the fixing box 201, passes through the first metering device 208 and the third fixing pipe 210, and is discharged by the air gun 205, the display quantity is displayed by the display device 203, and the operation panel 202 is controlled and operated, the metering mechanism is convenient to install, and the harm caused by static electricity is convenient to control.

It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.