CN209925630U

CN209925630U - Safety valve for natural gas pipeline

Info

Publication number: CN209925630U
Application number: CN201920811448.XU
Authority: CN
Inventors: 庞鑫
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-01-10
Anticipated expiration: 2029-05-31

Abstract

The utility model discloses a safety valve that natural gas line used, include: the valve comprises a valve body, a sealing cover, a valve core and a valve seat; the cross-section of valve body is L shape structure, the welding of the one end opening part of valve body has flange, and the welding of other end opening part has the connector, the sealed cowling welding is at the outer wall of the department of buckling of valve body, the inner wall of sealed cowling is provided with automatically controlled push rod, and the bottom of automatically controlled push rod is connected with the valve rod that extends to the valve body inner chamber, the case welding is in the bottom of valve rod, the cross section of disk seat is the annular structure. The utility model discloses in, this safety valve is through the storage capsule that sets up and storage rubber gasket for the inertia colloid that stores up in the capsule flows into and stores up in the rubber gasket, thereby makes and stores up rubber gasket expansion deformation, plays sealed protection's effect to the junction of compressed particleboard and disk seat, avoids the case junction to produce the phenomenon in joint gap, has also prevented that natural gas pressure is too big and has taken place the condition that the case junction leaked.

Description

Safety valve for natural gas pipeline

Technical Field

The utility model relates to a natural gas line safety valve technical field especially relates to a safety valve that natural gas line used.

Background

The safety valve is a special valve which is in a normally closed state under the action of external force, when the medium pressure in equipment or a pipeline rises to exceed a specified value, the medium pressure in the pipeline or the equipment is prevented from exceeding the specified value by discharging the medium to the outside of the system, the safety valve belongs to the automatic valve class, the control pressure does not exceed the specified value, the safety valve plays an important role in protecting the personal safety and the equipment operation, and on a natural gas pipeline, the safety valve is required to be used for carrying out safety protection on the natural gas pipeline.

However, when the safety valve for the existing natural gas pipeline is controlled to be opened and closed safely, the valve core and the valve seat are usually sealed in a direct closing mode, when the gas pressure on one side of the natural gas pipeline is too high, the gas pressure can continuously impact the joint of the valve core and the valve seat, so that the joint of the valve core and the valve seat is easy to generate a connecting gap, the natural gas leakage is caused, and the use safety of the safety valve is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a safety valve for a natural gas pipeline.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a safety valve for a natural gas pipeline, comprising: the valve comprises a valve body, a sealing cover, a valve core and a valve seat;

the cross section of the valve body is of an L-shaped structure, a connecting flange is welded at an opening at one end of the valve body, and a connector is welded at an opening at the other end of the valve body;

the sealing cover is welded on the outer wall of the bent part of the valve body, an electric control push rod is arranged on the inner wall of the sealing cover, the bottom of the electric control push rod is connected with a valve rod extending to the inner cavity of the valve body, and the valve core is welded on the bottom of the valve rod;

the valve seat is welded on the inner wall of the valve body and is positioned below the valve core, and the cross section of the valve seat is of an annular structure.

As a further description of the above technical solution:

the battery pack also comprises a storage battery pack;

the storage battery pack is arranged on the outer wall of the valve body;

and a pressure sensor is embedded in the inner wall of the valve body and is connected with the storage battery pack through a built-in lead.

As a further description of the above technical solution:

the device also comprises a limiting pipe;

the limiting pipe is welded on the inner wall of the valve body, and the diameter of the inner wall of the limiting pipe is equal to the diameter of the outer wall of the valve rod;

the valve rod runs through the inner cavity of the limiting pipe and extends outwards.

As a further description of the above technical solution:

also comprises a laminated board;

the laminated plate is welded on the top of the valve core;

the inside of compressed particleboard is inlayed and is equipped with and stores up the capsule, and stores up and be connected with the injecting glue pipe on the capsule to the open end of injecting glue pipe with paste the storage adhesive shim intercommunication at the compressed particleboard lower surface.

As a further description of the above technical solution:

the outer wall welding of pressfitting board has the spring, and the top elastic connection of spring has the driving plate to the protruding department in below of driving plate is connected with the top contact of storing up the capsule.

As a further description of the above technical solution:

the four clamping blocks are welded on the outer wall of the valve core at equal angles, the four clamping grooves are formed in the inner wall of the valve seat at equal angles, and the four clamping grooves are connected with the four clamping blocks in a one-to-one correspondence mode.

Advantageous effects

The utility model provides a safety valve that natural gas line used. The method has the following beneficial effects:

(1): this safety valve is through the storage capsule that sets up and store up the gasket, can receive too big natural gas pressure when oppressing storing up the capsule for the inert colloid that stores up in the capsule flows into and stores up in the gasket, thereby makes and stores up gasket inflation deformation, plays sealed protection's effect to the junction of pressed fitting board and disk seat, avoids the case junction to produce the phenomenon in connecting the gap, has also prevented that natural gas pressure is too big and the condition that the case junction leaked takes place.

(2): this safety valve has realized quick nimble switching between the two and has adjusted the operation through the flexible sliding connection's of correspondence case and the disk seat that sets up to under the assistance-localization real-time protection of fixture block and draw-in groove, the stability of position when further improvement case and disk seat are connected, and then improved safety valve's safety in utilization.

Drawings

Fig. 1 is a schematic view of an overall structure of a safety valve for a natural gas pipeline according to the present invention;

FIG. 2 is a schematic structural view of the joint between the valve core and the laminated plate of the present invention;

FIG. 3 is a schematic cross-sectional view of the valve core of the present invention;

fig. 4 is a schematic cross-sectional structure diagram of the valve seat of the present invention.

Illustration of the drawings:

1. a connecting flange; 2. a valve body; 3. a battery pack; 4. a pressure sensor; 5. an electrically controlled push rod; 6. a sealing cover; 7. a limiting pipe; 8. a valve stem; 9. a valve core; 91. pressing the plywood; 911. a glue injection pipe; 912. a drive plate; 913. a spring; 914. storing the capsules; 915. storing the rubber gasket; 92. a clamping block; 10. a connector; 11. a valve seat; 111. a clamping groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

As shown in fig. 1, a safety valve for a natural gas pipeline includes: the valve comprises a valve body 2, a sealing cover 6, a valve core 9 and a valve seat 11;

the cross section of the valve body 2 is of an L-shaped structure, the connecting flange 1 is welded at an opening at one end of the valve body 2, the connector 10 is welded at an opening at the other end of the valve body, and the safety valve can be conveniently connected with an external pipeline by using different connection modes of the connecting flange 1 and the connector 10, so that the workload of operators is reduced;

the sealing cover 6 is welded on the outer wall of the bent part of the valve body 2, the inner wall of the sealing cover 6 is provided with the electric control push rod 5, the bottom of the electric control push rod 5 is connected with the valve rod 8 extending to the inner cavity of the valve body 2, the valve core 9 is welded on the bottom of the valve rod 8, and the automatic driving control effect of the electric control push rod 5 is utilized to realize the automatic opening and closing effect of the safety valve;

the valve seat 11 is welded on the inner wall of the valve body 2 and is located below the valve core 9, the cross section of the valve seat 11 is of an annular structure, so that the valve seat and the valve core 9 are in overall contact clamping, and therefore the effect of controlling opening and closing of the natural gas pipeline is achieved.

The working principle is as follows: through flange 1 with safety valve and natural gas line screwed connection, cooperation connector 10 is connected safety valve and pressure release pipeline are embedded, ensure safety valve's the safe sealing of connection, when the natural gas pressure of 2 one sides of valve body was too big, automatically controlled push rod 5 starts, make drive valve rod 8 shift up, thereby shift out case 9 from disk seat 11, make natural gas line realize switching on of inner chamber, otherwise, automatically controlled push rod 5 can drive valve rod 8 and move down, with case 9 embedding to disk seat 11 in, play closed effect to natural gas line, and then realize the safety protection effect to natural gas line.

As shown in fig. 1, the automatic control valve further comprises a storage battery pack 3, the storage battery pack 3 is arranged on the outer wall of the valve body 2, a pressure sensor 4 is embedded in the inner wall of the valve body 2, the pressure sensor 4 is connected with the storage battery pack 3 through a built-in wire, the pressure sensor 4 can detect the natural gas pressure close to one side of the natural gas pipeline in the valve body 2 in real time, the natural gas pressure in the natural gas pipeline is transmitted to an external control device outwards in real time, and then the automatic control is carried out on the electric control push rod 5.

As shown in fig. 1, still include spacing pipe 7, spacing pipe 7 welds the inner wall at valve body 2, and the inner wall diameter of spacing pipe 7 equals with the outer wall diameter size of valve rod 8, and valve rod 8 runs through the inner chamber of spacing pipe 7 and outwards extends to, and spacing pipe 7 can play spacing centre gripping's effect to the lift removal process of valve rod 8, prevents that valve rod 8 from receiving the too big pressure of natural gas and the phenomenon of emergence skew to ensure that case 9 can move in and shift out the operation in disk seat 11.

As shown in fig. 2, the valve further comprises a pressing plate 91, the pressing plate 91 is welded on the top of the valve core 9, a storage capsule 914 is embedded inside the pressing plate 91, a glue injection pipe 911 is connected to the storage capsule 914, the open end of the glue injection pipe 911 is communicated with a glue storage gasket 915 adhered to the lower surface of the pressing plate 91, a spring 913 is welded on the outer wall of the pressing plate 91, a transmission plate 912 is elastically connected to the top of the spring 913, and a lower protrusion of the transmission plate 912 is in contact connection with the top of the storage capsule 914, when the air pressure on one side of the valve body 2 close to the natural gas pipeline increases, the natural gas can extrude the transmission plate 912 to move downwards and compress and deform the spring 913, at this time, the lower protrusion of the transmission plate 912 can extrude the storage capsule 914 to press the inert colloid inside the storage capsule 914 into the glue storage gasket through the glue injection pipe 911, so that the glue storage gasket 915 expands and deforms, thereby sealing the joint of the pressing plate, the natural gas leakage condition when the natural gas pressure is too high is avoided.

As shown in fig. 3 and 4, the outer wall of the valve element 9 is welded with four clamping blocks 92 at equal angles, the inner wall of the valve seat 11 is provided with four clamping grooves 111 at equal angles, the four clamping grooves 111 are connected with the four clamping blocks 92 in a one-to-one correspondence manner, the clamping blocks 92 are connected with the clamping grooves 111 in a matching manner, the connection position and the connection sealing performance of the valve element 9 and the valve seat 11 can be protected by sealing again, and the sealing stability of connection of the valve element 9 is greatly ensured.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A safety valve for a natural gas pipeline, comprising: the valve comprises a valve body (2), a sealing cover (6), a valve core (9) and a valve seat (11);

the cross section of the valve body (2) is of an L-shaped structure, a connecting flange (1) is welded at an opening at one end of the valve body (2), and a connector (10) is welded at an opening at the other end of the valve body;

the sealing cover (6) is welded on the outer wall of the bent part of the valve body (2), an electric control push rod (5) is arranged on the inner wall of the sealing cover (6), the bottom of the electric control push rod (5) is connected with a valve rod (8) extending to the inner cavity of the valve body (2), and the valve core (9) is welded on the bottom of the valve rod (8);

the valve seat (11) is welded on the inner wall of the valve body (2) and is positioned below the valve core (9), and the cross section of the valve seat (11) is of an annular structure.

2. A safety valve for a natural gas pipeline according to claim 1, further comprising a battery pack (3);

the storage battery pack (3) is arranged on the outer wall of the valve body (2);

the inner wall of the valve body (2) is embedded with a pressure sensor (4), and the pressure sensor (4) is connected with the storage battery pack (3) through a built-in lead.

3. A safety valve for a natural gas pipeline according to claim 1, further comprising a limit pipe (7);

the limiting pipe (7) is welded on the inner wall of the valve body (2), and the diameter of the inner wall of the limiting pipe (7) is equal to the diameter of the outer wall of the valve rod (8);

the valve rod (8) penetrates through the inner cavity of the limiting pipe (7) and extends outwards.

4. The safety valve for a natural gas pipeline according to claim 1, further comprising a laminate plate (91);

the laminated plate (91) is welded on the top of the valve core (9);

the inside of pressfitting board (91) is inlayed and is equipped with and stores up capsule (914), and stores up and be connected with injecting glue pipe (911) on capsule (914) to the open end of injecting glue pipe (911) with paste and store up adhesive shim (915) intercommunication at pressfitting board (91) lower surface.

5. The safety valve for the natural gas pipeline as claimed in claim 4, wherein the outer wall of the pressing plate (91) is welded with a spring (913), the top of the spring (913) is elastically connected with a driving plate (912), and the lower protrusion of the driving plate (912) is in contact connection with the top of the capsule (914).

6. The safety valve for the natural gas pipeline according to claim 1, wherein four clamping blocks (92) are welded on the outer wall of the valve core (9) at equal angles, four clamping grooves (111) are formed in the inner wall of the valve seat (11) at equal angles, and the four clamping grooves (111) are connected with the four clamping blocks (92) in a one-to-one correspondence manner.