CN210770466U

CN210770466U - Natural gas flow regulation and control device

Info

Publication number: CN210770466U
Application number: CN201921770663.6U
Authority: CN
Inventors: 王文栓
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-06-16
Anticipated expiration: 2029-10-22

Abstract

The utility model relates to a gas adjusting device field specifically is a natural gas flow regulation controlling means. The two shells are connected to form a pipeline, and a piston I, a spring I, a piston II and a spring II are arranged in the pipeline; the pipeline is divided into a backflow prevention area and a flow regulation area, a first piston and a first spring are arranged in the backflow prevention area, a second piston and a second spring are arranged in the flow regulation area, the backflow prevention area is K-shaped, the first piston moves in the vertical direction of the backflow prevention area, natural gas is introduced from the right below and the right below of the backflow prevention area, the flow regulation area is U-shaped, the upper right of the backflow prevention area is communicated with the upper left of the flow regulation area, the second piston is arranged between the left side and the right side of the flow regulation area, and the second piston is connected with an auxiliary piston. The utility model discloses can avoid the natural gas refluence, adjust the input flow, the slight leakage that the impact and the too high pressure that to a certain extent suppressed the production of pressure oscillation produced.

Description

Natural gas flow regulation and control device

Technical Field

The utility model relates to a gas adjusting device field specifically is a natural gas flow regulation controlling means.

Background

In order to protect the environment and control the atmospheric pollution, under the continuous promotion of the state, natural gas has gradually become the main fuel in life, people can utilize the heat generated by the combustion of the natural gas to carry out various production and living activities, at present, the natural gas is led to thousands of households through pipelines to be used by people, but in actual life, the natural gas cannot be used at every moment, when the natural gas is not used, because the natural gas in the pipelines cannot be released, larger pressure can be generated in the pipelines, the service lives of related appliances at the tail end of the natural gas use are influenced to a certain extent, and the condition of slight leakage can be caused by relatively overlarge pressure; in addition, the pressure in the natural gas main pipeline cannot be constantly in a stable state, and the possible very small pressure fluctuation in the main pipeline can also cause certain influence on related appliances at the tail end of the natural gas use, so that the service life is influenced; in addition, in the process of maintaining the main pipeline, natural gas in the main pipeline needs to be discharged in advance to avoid danger, but the inevitable residual gas exists in the natural gas auxiliary pipeline, and once the residual gas flows back, the residual gas is mixed with air to cause explosion risk.

At present, a flow regulating method frequently used in engineering is to set up a secondary high-pressure return pipeline, and to automatically regulate a pressure regulating valve by monitoring pressure change caused by flow change in the return pipeline, so as to control the flow of input natural gas.

Therefore, for solving above-mentioned problem, promote the universality, the utility model provides a natural gas flow adjusts controlling means.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a natural gas flow regulation controlling means, the purpose is according to the use amount of natural gas, and the natural gas volume in the auxiliary line is entered into from the trunk line in the control, avoids the auxiliary line in pressure continuously increases, extends the life of the terminal gas utensil of pipeline, avoids the slight leakage of the too big production of pressure, has also avoided the natural gas among the auxiliary line to flow back to the trunk line.

In order to solve the technical problem, the utility model discloses a technical scheme is:

the utility model provides a natural gas flow regulation controlling means, includes shell, piston one, spring one, piston two, spring two, its characterized in that:

the shell is provided with a semicircular groove with a specific shape, the two shells form a mirror image structure, the interiors of the two shells are opposite and connected together, so that a pipeline with a specific shape is formed in the shells, and the first piston, the first spring, the second piston and the second spring are arranged in the pipeline; the pipeline is divided into two areas, namely a backflow prevention area and a flow regulation area, a first piston and a first spring are arranged in the backflow prevention area, a second piston and a second spring are arranged in the flow regulation area, the backflow prevention area is K-shaped, the first piston is arranged in the vertical direction of the backflow prevention area, the two ends of the first piston are thick, the middle of the first piston is thin, the diameter of the two ends of the first piston is equal to that of the pipeline, the first spring is arranged above the first piston, natural gas is introduced from the position under and below the backflow prevention area, under the normal condition, the upper end of the first piston seals the upper right side of the backflow prevention area, the middle position of the first piston is communicated with the lower right side of the backflow prevention area, after gas is introduced, the first piston moves upwards under the action of pressure difference, and the upper right side and the lower right side of the backflow prevention area are communicated. The flow control region is the U type, prevent regional upper right side of refluence and the regional upper left side intercommunication of flow control, have between the regional left and right sides of flow control piston two, there is the left side of piston two the spring two makes the piston leans on to the right side, the left end diameter of piston two is far less than the right-hand member diameter, piston two is connected with vice piston, and under the normal condition, piston two leans on to the right, works as when the regional right side of flow control seals gradually, and internal pressure increases, under the effect of pressure differential, piston two moves the drive to the left vice piston removes, reduces gradually the regional area of overflowing of flow control.

Further, the first piston and the second piston are both provided with sealing rings.

Furthermore, a sealing gasket is arranged between the two shells.

Furthermore, the first spring is provided with a first limiting block.

Furthermore, a second limiting block is arranged on the other side, corresponding to the second spring, of the second piston.

Furthermore, the inlet and the outlet of the shell are both provided with external threads.

Furthermore, the semicircular groove in the shell is in excessive fit with the first piston and the second piston, and the sealing ring is in interference fit with the semicircular groove.

The utility model has the advantages that:

the utility model discloses by the shell, piston one, spring one, piston two, spring two, two are constituteed, two become the inboard relative links of shell of mirror image structure and can form a whole together, wherein can form a pipeline, the pipeline divides into two regions, it is regional and flow control region to prevent down-flow respectively, prevent down-flow regional function shape and be approximately K-shaped, the regional function shape of flow control is approximately U-shaped, the upper right corner of K-shaped is the same with the upper left corner of U-shaped, the natural gas flows in from K-shaped under and right side below, flow out from the upper right side of U-shaped, vertical direction is piston one in the positive middle of K-shaped, thin in the middle of piston one two is thick, be piston two between the left and right sides of U-shaped, piston two is the thin right-hand member of left end thick. Under normal conditions, the thinner middle position of the first piston is communicated with the lower right corner of the K-shaped structure, the second piston is close to the right side, after natural gas is introduced, because all the positions of the first piston are unevenly stressed, the stress area of the lower end of the first piston is large, and the pressure intensity of all the surfaces is the same, the first piston generates pressure difference to move upwards, the middle position of the first piston is simultaneously communicated with the upper right side and the lower right side of the K-shaped structure, the natural gas flows into the U-shaped structure, and after the gas supply is cut off, the first piston is reset by a spring for a while, so that the backflow of residual gas in the piston; under the condition of normal air supply, when the air consumption is reduced, the integral pressure in the U shape can be slightly increased, the pressure intensity at each position is also increased, and the areas of the two ends of the piston II are different, so that the pressure difference generated by the piston II moves leftwards to drive the auxiliary piston to change the flow area in the whole pipeline, and further, the integral flow is changed. The utility model has the advantages of simple structure, need not to use power and relevant electronic equipment, so whole use cost is comparatively cheap, adopts mechanical method to change through the atmospheric pressure under the discernment various condition and carries out corresponding action, and the fault rate is lower relatively, is fit for the use on a large scale. The utility model is applied and installed on the main pipeline and the auxiliary pipeline leading to the user, which can avoid the natural gas backflow in the auxiliary pipeline contacting with the air at the maintenance place when the main pipeline is maintained, and avoid the explosion risk generated by the mixed gas; when the natural gas of a user is reduced, the flow of the natural gas can be limited until the natural gas is not used completely, the auxiliary piston can close the pipeline, the influence of excessive pressure generated by continuous input of the natural gas on the service life of the gas appliance is avoided, and meanwhile, the impact of pressure change in the main pipeline on the gas appliance is also avoided; because the gas has the maximum pressure of permission, surpass this pressure and slight leakage probably appears, and when not using the natural gas, the utility model provides an auxiliary piston just seals the pipeline when not reaching maximum permissible pressure, has avoided the gas utensil to surpass maximum pressure and has caused slight leakage, has protected user of service's safety.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a schematic view of the internal structure of the present invention.

Fig. 4 is a schematic view of the internal structure of the present invention.

Wherein: the device comprises a shell 1, a piston 2I, a spring 3I, a piston 4 II, a spring 5 II, a bolt 6, a sealing gasket 7, a sealing ring 8, a pipeline 11, an inlet 12, an outlet 13, a stopper 14 II, a stopper 31I, a connecting rod 41, an auxiliary piston 42, a backflow prevention area 111 and a flow regulation area 112.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "back", "vertical", "lateral", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 4, the utility model discloses a natural gas flow regulating and controlling device, including shell 1, piston one 2, spring one 3, piston two 4, spring two 5, the semicircle recess that has specific shape in the shell 1, two shells are the mirror image structure, two shells 1 are inside relative and through hexagon socket head cap screw 6 link together, there is sealed pad 7 to guarantee the leakproofness of use between two shells 1, there is import 12 in the left lower side of shell 1, there is export 13 in the right lower side of shell, import 12 and export 13 all have the external screw thread, import 12 is connected with the main pipeline of natural gas, export 13 is connected with the auxiliary pipeline leading to one family or many families; the semi-circular grooves in the two housings may form a specially shaped duct 11 in the housing.

A first piston 2, a first spring 3, a second piston 4 and a second spring 5 are arranged in the pipeline 11; the pipeline 11 is divided into two areas, namely a backflow prevention area 111 on the left side and a flow regulation area 112 on the right side, a piston I2 and a spring I3 are arranged in the backflow prevention area 111, a piston II 4 and a spring II 5 are arranged in the flow regulation area 112, the backflow prevention area 111 is in a K shape basically, the piston I2 is in the vertical direction of the backflow prevention area, the two ends of the piston I2 are thick, the middle of the piston I2 is thin, the diameter of the two ends is equal to that of the position of the pipeline 11, sealing rings 8 are arranged at the two ends of the piston I2 to prevent natural gas from passing through the side face of the piston I2, the piston I2 can move in the vertical direction of the backflow prevention area 111, the spring I3 is connected above the piston I2, the other end of the spring I3 is connected to the shell, meanwhile, a limiting block I31 is arranged in the spring I3, the spring I3 and the limiting block I31 are, the inlet 12 is connected to the right and lower sides of the backflow prevention region 111, and natural gas is introduced from the inlet. Under normal conditions, the upper end of the first piston 2 plugs the upper right of the backflow prevention area 111, the middle position of the first piston 2 is communicated with the lower right of the backflow prevention area 111, gas in the auxiliary pipeline can be prevented from flowing back to the main pipeline, a sealing effect is achieved, after gas is introduced from the inlet 12 and certain pressure is reached, the first piston 2 can move upwards under the action of pressure difference due to different stress at different positions of the first piston 2, the upper right and the lower right of the backflow prevention area 111 are communicated, and the gas smoothly flows through the backflow prevention area 111 and flows to the flow regulation area 112. The whole flow regulating area 112 is U-shaped, the upper right of the backflow preventing area 112 is communicated with the upper left of the flow regulating area 111, a piston II 4 is arranged between the left side and the right side of the flow regulating area 112, the left end of the piston II 4 is arranged in the left side of the U-shaped flow regulating area 112, the right end of the piston II 4 is arranged in the right side of the U-shaped flow regulating area 112, the diameter of the left end of the piston II 4 is far smaller than that of the right end, a connecting rod 41 in the vertical direction is arranged above the piston II 4, a spring II 5 is arranged on the left side of the connecting rod 41 to enable the piston II 4 to lean to the right side under normal conditions, a second limiting block 14 is connected with the shell 1 on the right side of the connecting rod 41, the maximum moving distance of the piston II 4 to the right side can be limited by the second limiting block 14, an auxiliary piston 42 is connected above the connecting rod 41, under normal conditions, when the piston, because the internal pressure is increased, the left side and the right side of the second piston 4 are subjected to different pressures, the second piston 4 moves leftwards and drives the auxiliary piston 42 to move under the action of pressure difference, the flow area of the flow adjusting area 112 is gradually reduced, so that the flow can be adjusted as required, the sealing rings 8 are arranged at the two ends of the second piston 4 to prevent natural gas from flowing through the side face of the second piston 4, and meanwhile, the sealing rings 8 are arranged at the end part of the auxiliary piston 42 to prevent the natural gas from flowing through.

The pipeline 11 in the shell 1 is in over-fit with the first piston 2 and the second piston 4, and the sealing ring 8 is in interference fit with the pipeline 11, so that the first piston 2 and the second piston 4 can smoothly move, and meanwhile, the sealing performance of each piston is guaranteed.

The working principle is as follows: before use, the inlet 12 is connected to a main natural gas line and the outlet 13 is connected to a secondary line leading to the user. When the natural gas backflow prevention device is used, when certain pressure is reached in a main pipeline, the piston I2 can move upwards, so that natural gas is sent into an auxiliary pipeline through the natural gas backflow prevention device, when the pressure in the main pipeline is reduced due to maintenance and the like, the piston I2 can reset under the action of the spring I3, backflow of residual natural gas in the auxiliary pipeline is avoided, and the risk of explosion caused by mixing of natural gas backflow and air in the main pipeline maintenance process can be restrained to a certain extent; in the using process of a user, the using amount of the natural gas of the user is in a constantly changing process, and when the gas consumption is less, the whole pressure in the flow adjusting area 111 can be increased, so that the second piston 4 can move to the left, and the auxiliary piston 42 is driven to move to the left to change the flow area of the pipeline 11, thereby changing the flow; when a user does not use natural gas, the second piston 4 is arranged at the leftmost side, the overflowing area in the pipeline 11 is zero, no natural gas flows through, the impact of pressure fluctuation in the main pipeline on the auxiliary pipeline can be avoided to a certain extent, and the safety is enhanced; furthermore, the utility model discloses under the terminal gas utensil of auxiliary line has not reached the condition of allowwing maximum pressure value, the utility model discloses an area of overflowing has become zero for pressure in the auxiliary line can not continue to rise, and the gas pressure that has avoided the pressure in the auxiliary line to continuously rise and cause surpasss the slight leakage that gas utensil allowwed pressure to produce.

Further, the above-mentioned fixed connection and fixed mounting are to be understood in a broad sense unless otherwise specifically stated or limited, and may be, for example, welding, gluing, or integrally formed, as is conventional in the art.

The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A natural gas flow regulating and controlling device is characterized by comprising a shell, a first piston, a first spring, a second piston and a second spring, wherein a semicircular groove is formed in the shell, the two shells form a mirror image structure, the interiors of the two shells are oppositely connected together to form a pipeline, and the first piston, the first spring, the second piston and the second spring are arranged in the pipeline; the pipeline is divided into two areas, namely a backflow prevention area and a flow regulation area, the backflow prevention area is provided with a piston I and a spring I, the flow regulation area is provided with a piston II and a spring II, the backflow prevention area is K-shaped, the piston moves in the vertical direction of the backflow prevention area, the two ends of the first piston are thick, the middle of the first piston is thin, the diameters of the two ends of the first piston are equal to the diameter of the pipeline, a first spring is arranged above the first piston, natural gas is introduced from the right lower part and the right lower part of the backflow prevention area, the flow regulating area is U-shaped, the upper right of the backflow prevention area is communicated with the upper left of the flow regulating area, and a second piston is arranged between the left side and the right side of the flow regulating area and can move left and right, the left side of the second piston is provided with a second spring, the diameter of the left end of the second piston is smaller than that of the right end of the second piston, and the second piston is connected with an auxiliary piston.

2. The natural gas flow regulating and controlling device as claimed in claim 1, wherein the first piston and the second piston are provided with sealing rings.

3. The natural gas flow regulating and controlling device as claimed in claim 1, wherein a sealing gasket is provided between the two housings.

4. The natural gas flow regulating and controlling device as claimed in claim 1, wherein the first spring has a first stopper therein.

5. The natural gas flow rate regulating and controlling device as claimed in claim 1, wherein a second stopper is provided on the other side of the second piston corresponding to the second spring.

6. The natural gas flow regulating and controlling device as claimed in claim 1, wherein the inlet and the outlet of the housing are externally threaded.

7. The natural gas flow regulating and controlling device as claimed in claim 2, wherein the semicircular groove in the housing is in over-fit with the first piston and the second piston, and the sealing ring is in interference fit with the semicircular groove.