CN212131435U - Restriction valve for petroleum and natural gas transportation pipeline - Google Patents

Abstract

The utility model belongs to the technical field of the natural gas restriction valve and specifically relates to a restriction valve for oil and gas transport pipe. The valve plate fixing sleeve is horizontally arranged at the middle part of the valve rod, the edge of the valve plate is abutted against the inner wall of the shell, a vent hole is formed in the valve plate, and a closing device is movably sleeved on the valve rod above the valve plate. Its structural design is reasonable, can guarantee the long-time normal work of restriction valve, when meetting emergency, can close the restriction valve, improves the security of using, avoids taking place unexpected circumstances such as explosion, need not to dismantle restriction valve is whole to be changed, has solved the problem that exists among the prior art.

Description

Restriction valve for petroleum and natural gas transportation pipeline

The technical field is as follows:

the utility model belongs to the technical field of the natural gas restriction valve and specifically relates to a restriction valve for oil and gas transport pipe.

Background art:

the oil field gas is also called oil field associated gas, and refers to natural gas produced while oil is being exploited. The associated gas in oil fields in China has abundant resources and high yield, and the emission of carbon dioxide can be effectively reduced by burning natural gas, so the method is an important green energy source. Generally, natural gas is transported by pipelines or transport vehicles, and particularly, when transport vehicles are used for transportation, due to the consideration of safety of equipment such as storage tanks, flow limiting valves are usually installed on inlet and outlet pipelines of the transport vehicles so as to ensure that natural gas can be smoothly excessive in the transfer process. In the process of transferring natural gas, once high-pressure leakage occurs in the subsequent transportation or gas storage system of the petroleum and natural gas, fire or explosion is easy to occur, and casualties and property loss are caused, so that the petroleum and natural gas needs to be limited.

The current flow limiting valve has the main reason that after the current flow limiting valve is used for a period of time, the flow limiting effect is not obvious, the main reason is that impurities mixed in natural gas are blocked, the transfer speed of the natural gas is greatly reduced, the working efficiency is influenced, and the current flow limiting valve can only be periodically replaced to avoid the blockage of the impurities, so that the natural gas is transferred more smoothly, but the current flow limiting valve is time-consuming and labor-consuming to assemble and disassemble.

The utility model has the following contents:

the utility model provides a restriction valve for oil and gas transport pipeline, its structural design is reasonable, can guarantee the long-time normal work of restriction valve, when meetting proruption situation, can close the restriction valve, the security of using improves, avoid unexpected circumstances such as exploding, need not to dismantle the restriction valve is whole and can change, time saving and labor saving improves work efficiency, the suitability is stronger, can clear up at any time as required, in order to guarantee the normal transfer rate of natural gas, the problem that exists among the prior art has been solved.

The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be:

the utility model provides a restriction valve for oil and gas transportation pipeline, casing including the open setting in both ends, be equipped with sealed lid at casing bottom opening part, be equipped with an outlet duct rather than being linked together at casing lower part one side lateral wall, the vertical valve rod that is equipped with in the casing, the valve rod bottom sets up on sealed lid, the fixed cover of valve plate that a level set up is established at the valve rod middle part, its edge and casing inside wall butt, be equipped with the air vent on the valve plate, closing device is established to movable sleeve on the valve rod of valve plate top, the ring is established the flange on the casing inside wall of closing device top, closing device outward flange butt is in the flange bottom, and leave the clearance with the.

Preferably, the casing includes casing and lower casing, and last casing lower part lateral wall is fitted with a contraceptive ring and is set for the holding ring, and the threaded ring is fitted with a contraceptive ring on casing upper portion lateral wall down, and the lock ring is established to the movable sleeve on last casing, and the lock ring horizontal segment butt is on the holding ring, and its vertical section inboard links to each other with the threaded ring screw thread.

Preferably, a first sealing ring abutting against the lower shell is annularly arranged at the bottom of the upper shell.

Preferably, the closing device comprises a lower pressing plate movably sleeved on the valve rod, the lower pressing plate is tightly attached to the inner wall of the shell, a flow limiting hole is formed in the lower pressing plate, a spring is sleeved on the valve rod between the lower pressing plate and the valve plate, the upper end of the spring is connected into an upper groove of the lower pressing plate, the lower end of the spring is connected into a lower groove of the valve plate, a valve clack is movably sleeved on the valve rod above the lower pressing plate, the top of the valve clack abuts against the bottom of the flange, a gap is reserved between the edge of the valve clack and the inner wall of the shell, a plurality of connecting rods connected with the lower pressing plate are uniformly arranged at the bottom of the valve clack, a thread groove is formed in the valve; the shell between the valve clack and the lower pressing plate is filled with filter cotton.

Preferably, the top of the valve flap is recessed inwardly.

Preferably, a fixed seat which is clamped at the bottom of the shell is movably arranged in the sealing cover, and the valve rod is arranged in the center of the top of the fixed seat.

Preferably, a second sealing ring abutting against the inner wall of the shell is arranged on the side wall of the fixed seat.

Preferably, the top edge of the valve rod is provided with a chamfer.

The above structure is adopted in the utility model, have and to guarantee the long-time normal work of restriction valve, when meetting proruption situation, can close the restriction valve, improve the security of using, avoid unexpected circumstances such as explosion, need not to dismantle the restriction valve is whole to be changed, labour saving and time saving improves work efficiency, and the suitability is stronger, can clear up at any time as required to guarantee the normal transfer rate of natural gas.

Description of the drawings:

fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic side view of the present invention.

Fig. 3 is a schematic sectional view along the direction of a-a in fig. 2.

Fig. 4 is a schematic perspective view of the valve rod, the valve plate, the lower pressing plate and the valve flap.

Fig. 5 is a schematic perspective view of the valve flap and the support rod.

Fig. 6 is a schematic perspective view of the filter cotton.

In the figure, 1, a sealing cover; 2. an air outlet pipe; 3. a valve stem; 4. a valve plate; 5. a vent hole; 6. a flange; 7. an upper housing; 8. a lower housing; 9. a positioning ring; 10. a threaded ring; 11. a locking ring; 12. a positioning ring; 13. a first seal ring; 14. a lower pressing plate; 15. a flow restriction orifice; 16. a spring; 17. an upper groove; 18. a lower groove; 19. a valve flap; 20. a connecting rod; 21. a convex ball; 22. a fixed seat; 23. a second seal ring; 24. and (5) filtering cotton.

The specific implementation mode is as follows:

in order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings.

As shown in fig. 1-6, a flow-limiting valve for petroleum and natural gas transportation pipelines comprises a casing with two open ends, a sealing cover 1 is arranged at an opening at the bottom of the casing, an air outlet pipe 2 communicated with the casing is arranged on the side wall of one side of the lower part of the casing, a valve rod 3 is vertically arranged in the casing, the bottom end of the valve rod 3 is arranged on the sealing cover 1, a horizontally arranged valve plate 4 is fixedly sleeved at the middle part of the valve rod 3, the edge of the valve plate is abutted against the inner wall of the casing, an air vent 5 is arranged on the valve plate 4, a closing device is movably sleeved on the valve rod 3 above the valve plate 4, a flange 6 is annularly arranged on the inner wall of the casing above the closing device, the outer edge of.

The casing includes casing 7 and casing 8 down, and at casing 7 lower part lateral wall go up the ring and set up position ring 9, set up threaded ring 10 on casing 8 upper portion lateral wall down, and the movable sleeve establishes check ring 11 on casing 7, and 11 horizontal segments butt of check ring are on holding ring 12, and its vertical section inboard links to each other with threaded ring 10 screw thread. The whole loading and unloading are convenient, and the loading and unloading work efficiency is improved.

Preferably, a first sealing ring 13 abutting on the lower housing 8 is annularly arranged at the bottom of the upper housing 7. The sealing performance in the shell is improved, and natural gas is prevented from leaking.

Preferably, the closing device comprises a lower pressure plate 14 movably sleeved on the valve rod 3, the lower pressure plate 14 is tightly attached to the inner wall of the shell, a flow limiting hole 15 is formed in the lower pressure plate 14, a spring 16 is sleeved on the valve rod 3 between the lower pressure plate 14 and the valve plate 4, the upper end of the spring 16 is connected into an upper groove 17 of the lower pressure plate 14, the lower end of the spring 16 is connected into a lower groove 18 of the valve plate 4, a valve flap 19 is movably sleeved on the valve rod 3 above the lower pressure plate 14, the top of the valve flap 19 abuts against the bottom of the flange 6, a gap is reserved between the edge of the valve flap and the inner wall of the shell, a plurality of connecting rods 20 connected with the lower pressure plate 14 are uniformly arranged at the bottom of the valve flap 19, a thread groove is formed in the valve rod 3 above the valve plate 4; the housing between the valve flap 19 and the lower pressure plate 14 is filled with filter cotton 24.

Preferably, the top of the flap 19 is recessed inwardly. The contact area with the natural gas is improved.

Preferably, a fixed seat 22 clamped at the bottom of the shell is movably arranged in the sealing cover 1, and the valve rod 3 is arranged in the center of the top of the fixed seat 22. Make the firm connection of sealed lid in the casing bottom on the one hand, on the other hand, improve the stability of valve rod 3.

Preferably, a second sealing ring 23 abutting against the inner wall of the housing is provided on the side wall of the fixed seat 22. The sealing performance in the shell is improved, and natural gas is prevented from leaking.

Preferably, the top edge of the valve rod 3 is provided with a chamfer. The natural gas is prevented from directly impacting the valve rod 3, and the resistance is reduced.

The housing between the valve flap 19 and the lower pressure plate 14 is filled with filter cotton 24. Impurity in the natural gas is convenient for in time filter, prevents to rush into along with the natural gas together, improves the life of device, simultaneously, also makes other jam of avoiding impurity to rush into to cause.

When the device is used, natural gas enters from the top of the shell and impacts the valve clack 19, the valve clack 19 moves downwards along the thread groove of the valve rod 3 through the convex ball 21 arranged on the inner wall of the valve clack 19, so that the valve clack 19 is separated from the flange 6 on the inner wall of the shell, the natural gas enters from the gap formed by the flange 6 and the valve clack 19, at the moment, the valve clack 19 drives the lower pressing plate 14 to move synchronously through the connecting rod 20, the spring 16 is in a compression state, the natural gas enters from the flow limiting hole 15 of the lower pressing plate 14 and moves downwards along the vent hole 5 on the valve plate 4, and finally the natural gas is discharged outwards from the gas. Once the subsequent transportation of the petroleum and natural gas or the gas storage system has high pressure leakage, the flow rate of the natural gas is rapidly increased, so that the valve flap 19 further moves downwards until the lower pressure plate 14 is closed on the valve plate 4, and at the moment, the flow limiting hole 15 on the lower pressure plate 14 is positioned on the valve plate 4 outside the vent hole 5, so that the vent channel is rapidly closed to prevent further danger, and the spring 16 is in a compressed state and is positioned in a closed cavity formed by the upper groove 17 and the lower groove 18. When the danger is relieved and the natural gas is recovered, the spring 16 recovers deformation and pushes the lower pressure plate 14 and the valve clack 19 to move upwards, so that the circulation of the natural gas is recovered.

When this device needs to be washd, can close the air inlet end of natural gas earlier, twist sealed lid 1 again, make it separate with the casing, sealed lid drives fixing base 22, valve rod 3, valve clack 4, holding down plate 14, valve clack 19 and cross filter pulp 24, together outwards take out, cross filter pulp 24 through changing, get rid of impurity, install again, can use, need not to dismantle the whole of restriction valve and can change, time saving and labor saving, the work efficiency is improved, the suitability is stronger, can clear up at any time as required, in order to guarantee the normal transfer speed of natural gas.

The above-mentioned specific embodiments can not be regarded as the restriction to the scope of protection of the utility model, to technical personnel in this technical field, it is right the utility model discloses any replacement improvement or transform that embodiment made all fall within the scope of protection of the utility model.

The parts of the present invention not described in detail are the known techniques of those skilled in the art.

Claims (8)

1. The utility model provides a restriction valve for oil and gas transport pipe which characterized in that: the valve plate fixing device comprises a shell with two open ends, a sealing cover is arranged at an opening at the bottom of the shell, an air outlet pipe communicated with the shell is arranged on one side wall of the lower portion of the shell, a valve rod is vertically arranged in the shell, the bottom end of the valve rod is arranged on the sealing cover, a valve plate fixing sleeve horizontally arranged is arranged in the middle of the valve rod, the edge of the valve plate is abutted to the inner wall of the shell, an air vent is formed in the valve plate, a closing device is movably sleeved on the valve rod above the valve plate, a flange is annularly arranged on the inner wall of the shell above the closing device, the outer edge of the.

2. The flow limiting valve for the petroleum and natural gas transportation pipeline according to claim 1, which is characterized in that: the casing includes casing and lower casing, sets up the holding ring on the upper portion lateral wall of last casing lower part, sets up the screw ring on casing upper portion lateral wall down, and the lock ring is established to the movable sleeve on last casing, and the horizontal section butt of lock ring is on the holding ring, and its vertical section inboard links to each other with the screw ring screw thread.

3. The flow limiting valve for the petroleum and natural gas transportation pipeline according to claim 2, which is characterized in that: the bottom of the upper shell is annularly provided with a first sealing ring which is abutted against the lower shell.

4. The flow restriction valve for an oil and gas transport pipeline according to claim 1 or 2, characterized in that: the closing device comprises a lower pressing plate movably sleeved on the valve rod, the lower pressing plate is tightly attached to the inner wall of the shell, a flow limiting hole is formed in the lower pressing plate, a spring is sleeved on the valve rod between the lower pressing plate and the valve plate, the upper end of the spring is connected into an upper groove of the lower pressing plate, the lower end of the spring is connected into a lower groove of the valve plate, a valve clack is movably sleeved on the valve rod above the lower pressing plate, the top of the valve clack abuts against the bottom of a flange, a gap is reserved between the edge of the valve clack and the inner wall of the shell, a plurality of connecting rods connected with the lower pressing plate are uniformly arranged at the bottom of the valve clack, a thread groove is formed in the; the shell between the valve clack and the lower pressing plate is filled with filter cotton.

5. The flow limiting valve for the petroleum and natural gas transportation pipeline according to claim 4, which is characterized in that: the top of the valve clack is inwards concave.

6. The flow limiting valve for the petroleum and natural gas transportation pipeline according to claim 1, which is characterized in that: a fixed seat which is clamped at the bottom of the shell is movably arranged in the sealing cover, and the valve rod is arranged in the center of the top of the fixed seat.

7. The flow-limiting valve for the petroleum and natural gas transportation pipeline according to claim 6, which is characterized in that: and a second sealing ring which is abutted against the inner wall of the shell is arranged on the side wall of the fixed seat.

8. The flow limiting valve for the petroleum and natural gas transportation pipeline according to claim 1, which is characterized in that: and the edge of the top of the valve rod is provided with a chamfer.

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