CN117489338B - A wellhead sampling vent cut-off device and its use method - Google Patents
A wellhead sampling vent cut-off device and its use method Download PDFInfo
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- CN117489338B CN117489338B CN202410001474.1A CN202410001474A CN117489338B CN 117489338 B CN117489338 B CN 117489338B CN 202410001474 A CN202410001474 A CN 202410001474A CN 117489338 B CN117489338 B CN 117489338B
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- 238000005070 sampling Methods 0.000 title claims abstract description 143
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 229
- 239000012530 fluid Substances 0.000 claims abstract description 20
- 238000011010 flushing procedure Methods 0.000 claims abstract description 7
- 230000007246 mechanism Effects 0.000 claims abstract description 5
- 238000001179 sorption measurement Methods 0.000 claims description 8
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 238000013022 venting Methods 0.000 claims 3
- 238000011109 contamination Methods 0.000 claims 1
- 239000003208 petroleum Substances 0.000 abstract description 15
- 239000003129 oil well Substances 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 9
- 239000012535 impurity Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000009991 scouring Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/086—Withdrawing samples at the surface
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a wellhead sampling emptying stop device and a using method thereof, belonging to the technical field of petroleum sampling; the sampling valve is fixedly connected to the upper end of the oil well mouth; the sampling flow hole is arranged on the lower inner wall of the sampling valve; the anti-flushing mechanism comprises an inner hanging rod, a telescopic groove, a telescopic rod, a sealing groove, a sealing block, a lower sealing rod, a first spring groove, a sliding rod sliding groove, a fixed slot, a first spring plate, a fixed inserting rod and a first telescopic spring, wherein the first spring groove, the sliding rod sliding groove, the fixed slot, the first spring plate and the fixed inserting rod are all provided with two parts, the first telescopic spring is provided with a plurality of parts, the valve body is reduced from a closed state to a period of time when the valve body is not completely opened, the flushing time of high-speed fluid to the lower end of the sealing block is further reduced, and the whole service life of the valve body is prolonged.
Description
Technical Field
The invention belongs to the technical field of petroleum sampling, and particularly relates to a wellhead sampling emptying stop device and a using method thereof.
Background
The oil sampling at the wellhead of the pumping well is the most basic operation skill in daily management of the oil well. Physical parameters of oil well produced liquid are obtained through testing and analyzing the sampled oil sample, and basis is provided for dynamic analysis of oil well production and improvement of oil well management measures.
Through searching, it is found that in the chinese patent with the publication number of CN111520482B, a blocking effect is achieved, the damage of the sealing surface is reduced, the pressure is reduced and the impurity is filtered on the medium, the impurity in the medium can be captured, the damage and the blockage of the sealing surface are reduced, the service life of the blow-off stop valve is prolonged, the blow-off stop valve comprises a valve body, an inlet cavity and an outlet cavity which are sequentially arranged on the valve body, a valve seat which is arranged on the valve body and is positioned between the inlet cavity and the outlet cavity, a valve cover which is arranged on the valve body, a bracket which is arranged on the valve cover, a valve rod nut which is arranged on the bracket, a valve core sleeve which is arranged between the valve seat and the valve cover and is provided with a throttle opening, a throttle stop assembly which is arranged in the valve core sleeve, and a drain cover which is arranged on the lower end of the valve body, wherein the throttle stop assembly comprises a throttle head and a valve which is arranged on the throttle head.
The invention can prevent the pressure generated by the medium during flowing from being directly stressed on the sealing surface through the arrangement of the anti-scouring baffle, plays a role of baffle, and can not change the integral pressure of the hydraulic pressure in the inlet cavity to the sealing surface when the damage of the sealing surface is reduced.
Disclosure of Invention
The invention aims to provide a wellhead sampling emptying stop device and a using method thereof, and aims to solve the problems that in the prior art, a sealing surface is manually unscrewed from a valve body and drives a sealing body to slowly move upwards in the process from closing to fully opening, and in the process from slowly moving upwards to fully opening, the speed of flushing a flow hole by too small fluid is higher, and the flushing of the edge of the sealing surface is stronger.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a wellhead sampling blow-down shut-off device, comprising:
an oil wellhead;
the sampling valve is fixedly connected to the upper end of the oil well mouth;
the sampling flow hole is arranged on the lower inner wall of the sampling valve;
the anti-flushing mechanism comprises an inner hanging rod, a telescopic groove, a telescopic rod, a sealing groove, a sealing block, a lower sealing rod, a first spring groove, a sliding rod chute, a first spring plate, a fixed slot, a fixed inserting rod and first telescopic springs, wherein two first spring grooves, a sliding rod chute, the fixed slot, the first spring plate and the fixed inserting rod are arranged;
the throttle assembly is provided with two groups, and the two groups of throttle assemblies are arranged in the sampling valve and used for throttle sampling.
As a preferable scheme of the invention, a switch component is arranged in the sampling valve and comprises a screwing groove, a limiting rotating groove, a screwing block, a limiting rotating plate, a screw plate, a first screw groove and a handle, wherein the screwing groove is formed at the upper end of the sampling valve and is communicated with the telescopic groove, the limiting rotating groove is formed in the circumferential inner wall of the screwing groove, the screwing block is rotationally connected in the screwing groove, the limiting rotating plate is fixedly connected to the circumferential surface of the screwing block and rotates in the limiting rotating groove, the first screw groove is formed at the lower end of the screwing block, the screw plate is fixedly connected to the upper end of the telescopic groove and is in threaded connection with the first screw groove, and the handle is fixedly connected to the upper end of the screwing block.
As a preferred scheme of the invention, each group of throttling components comprises a throttling through hole, a closing groove, a closing plate, a pulling groove, a pulling rod, a sliding groove, a second spring groove, a pushing chute, a sliding rod, a second spring plate, a second telescopic spring and a pushing sliding block, wherein the throttling through hole is relatively arranged on the side surface of a sampling flow hole, the closing groove is arranged on one side inner wall of the throttling through hole, the closing plate is rotatably connected with one side inner wall of the closing groove through a rotating shaft, the pulling groove is arranged at one side end of the closing plate, the pulling rod is slidably connected in the pulling groove, the sliding groove is arranged on one side inner wall of the closing groove, the sliding groove is communicated with the second spring groove, the pushing chute is arranged on the circumference inner wall of the sampling flow hole and is communicated with the second spring groove, the sliding rod is fixedly connected with one side end of the pulling rod and slides in the sliding groove, the second spring plate is fixedly connected with the circumference surface of the sliding rod and slides in the second spring groove, the second telescopic spring is sleeved on one side of the sliding rod, and one end of the second spring plate is fixedly connected with one side of the sliding chute.
As a preferable scheme of the invention, the upper inner wall of the closed groove is fixedly connected with a fitting block.
As a preferable scheme of the invention, the upper end of the sealing block is fixedly connected with an upper sealing ring.
As a preferable scheme of the invention, a lower sealing ring is arranged at the edge of the upper end of the sampling flow hole.
As a preferable scheme of the invention, the upper inner wall of the sampling valve is provided with a drainage groove.
As a preferable scheme of the invention, one side end of the sampling valve is fixedly connected with a drainage tube, the lower end of the drainage tube is provided with a second thread groove, and the second thread groove is internally and in threaded connection with a sampling bottle.
As a preferable scheme of the invention, the lower end of the inner hanging rod and the screwing groove are connected with a connecting hole in a penetrating way.
The application method of the wellhead sampling emptying stop device comprises the following steps:
s1, a lower sealing rod and a telescopic rod are respectively plugged up an upper opening and a lower opening of a sealing groove to enable the sealing groove to be in a sealing state, a sealing block is used for closing a sampling flow hole, a handle is screwed to pull the telescopic rod upwards, the air pressure in the sealing groove is lowered when the telescopic rod moves upwards due to the fact that the total amount of air in the sealing groove is unchanged, the lower sealing rod is adsorbed upwards and drives the sealing block to slide upwards along with the movement of the telescopic rod, at the moment, the sampling flow hole is in an open state, the fixed inserting rod abuts against one side inner wall of the sealing block, a first telescopic spring is in a stretched state, when the sampling flow hole needs to be closed, the telescopic rod is pressed downwards by a rotating handle, the lower sealing rod is not sufficiently adsorbed by the adsorption force of the lower air pressure in the sealing groove until the sealing block is inserted into the sampling flow hole to be closed, at the moment, a fixed slot in the sealing block is opposite to a slide groove opening in the inner hanging rod, at the moment, the first telescopic spring in the stretched state is rebounded to pull the fixed inserting rod into the fixed slot to complete the fixation of the sealing block, at the moment, the telescopic rod is continuously moved downwards into the inner wall to be increased, and the pressure in the sealing groove is increased, and the pressure is applied to the sealing groove through the high pressure to close the sealing hole;
s2, when a sampling flow hole is required to be opened for petroleum sampling, a handle is rotated to drive a telescopic rod to slide back into a telescopic groove and slide upwards continuously so as to reduce the air pressure in a sealing groove, when the telescopic rod slides to a height capable of adsorbing a lower sealing rod upwards, a sealing block is fixed and cannot move upwards due to the fact that the fixed inserting rod is inserted into the fixed groove, the telescopic rod continues to slide upwards until the air pressure in the sealing groove is lower than the adsorption force of a first telescopic spring, the first telescopic spring stretches to slide the first spring plate to one side of the sealing groove and pull the fixed inserting rod out of the fixed groove, when the fixed inserting rod is completely pulled out of the fixed inserting groove arranged in the sealing block, the air pressure in the sealing groove is far lower than the air pressure intensity capable of adsorbing the lower sealing rod upwards, the lower sealing rod is adsorbed and slides upwards rapidly so as to drive the sealing block to slide upwards so as to open the sampling flow hole, the sealing block is fixed and lifted rapidly until the air pressure in the sealing block is lower than the critical value of the adsorption pulling the first spring plate in the sealing groove, the sealing block is lifted rapidly, the time is shortened until the sealing block is in the sealing block is pulled out of the critical value, and the sealing block is in the state of being pulled out until the inner wall of the sealing block is in the state of the sealing block is closed for one time;
s3, after the sampling flow hole is quickly opened, the high-speed fluid flows upwards to be guided by the diversion trench to generate vortex so as to reduce the flow speed of the petroleum fluid, and the sampling bottle is fixed at the oil outlet in advance, so that pollution caused by splashing of the high-flow-speed petroleum outside the sampling device during sampling is avoided.
Compared with the prior art, the invention has the beneficial effects that:
1. through this device, the internal air pressure of seal groove reduces to can adsorb the critical value of pulling first spring plate after, and fixed inserted bar is pulled out, releases the fixed of sealing block and lifts up the sealing block fast, reduces the valve body from closing state to this a period that does not open completely, and then reduces the scouring time of high-speed fluid to the sealing block lower extreme, increases the holistic life of valve body.
Through this device, slide the sealing block to the top that promotes the slider, when not having slipped out the sampling flow hole completely yet, the fixed restriction of promoting the slider is released, the sealing block no longer blocks to promote the slider and pops out, because the second expansion spring that is stretched before rebounds, will pull the closure plate and open the opening of throttle through-hole, before the sealing block will take a sample the flow hole and open completely, partial petroleum fluid flows into the sampling valve from the throttle through-hole of opening in, when the sealing block will take a sample the flow hole and open, through the partial pressure of two sets of throttle assemblies, further reduce the impact that the sealing block lower extreme received.
Through this device, screw in the second thread groove with the sample bottle earlier before taking a sample in with the sample bottle fixed, later the oil can avoid the fluid velocity of flow to lead to the spill to cause the pollution after flowing into the sample bottle from the sampling valve.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a perspective view of the structure of the present invention;
FIG. 2 is a first cross-sectional view of the structure of the present invention;
FIG. 3 is a cross-sectional view of a second construction of the present invention;
FIG. 4 is a cross-sectional exploded view of a first construction of the present invention;
FIG. 5 is a cross-sectional exploded view of a second construction of the present invention;
FIG. 6 is an enlarged view of the invention at A in FIG. 3;
FIG. 7 is an enlarged view of the invention at B in FIG. 4;
FIG. 8 is an enlarged view of the invention at C in FIG. 4;
fig. 9 is an enlarged view of the invention at D in fig. 4.
In the figure: 1. an oil wellhead; 2. a sampling valve; 3. sampling flow holes; 4. an inner hanging rod; 5. a telescopic slot; 6. a telescopic rod; 7. sealing grooves; 8. a sealing block; 9. a lower sealing rod; 10. a first spring groove; 11. a slide bar chute; 12. a first spring plate; 13. fixing the inserted link; 14. a first extension spring; 15. twisting the groove; 16. limiting rotating grooves; 17. twisting the block; 18. limiting rotating plate; 19. a thread plate; 20. a first thread groove; 21. a handle; 22. a throttle through hole; 23. a closing plate; 24. pulling the groove; 25. pulling the rod; 26. a sliding groove; 27. a second spring groove; 28. pushing the chute; 29. a slide bar; 30. a second spring plate; 31. a second extension spring; 32. pushing the sliding block; 33. a bonding block; 34. an upper sealing ring; 35. a lower sealing ring; 36. drainage grooves; 37. a drainage tube; 38. a second thread groove; 39. sampling bottle; 40. a fixed slot; 41. closing the slot.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1-9, the present invention provides the following technical solutions:
a wellhead sampling blow-down shut-off device, comprising:
an oil wellhead 1;
the sampling valve 2 is fixedly connected to the upper end of the oil well mouth 1;
the sampling flow hole 3 is formed in the lower inner wall of the sampling valve 2;
the anti-impact mechanism comprises an inner hanging rod 4, a telescopic groove 5, a telescopic rod 6, a sealing groove 7, a sealing block 8, a lower sealing rod 9, a first spring groove 10, a sliding rod sliding groove 11, a fixed slot 40, a first spring plate 12, a fixed inserting rod 13 and a first telescopic spring 14, wherein the number of the first spring groove 10, the sliding rod sliding groove 11, the fixed slot 40, the first spring plate 12 and the fixed inserting rod 13 is two, the number of the first telescopic springs 14 is multiple, the inner hanging rod 4 is fixedly connected with the upper inner wall of the sampling valve 2, the sealing groove 7 is arranged at the lower end of the inner hanging rod 4, the telescopic groove 5 is arranged at the upper inner wall of the sealing groove 7, the telescopic rod 6 is slidably connected in the telescopic groove 5, the sealing block 8 is slidably connected with the outer surface of the inner hanging rod 4 and the sampling flow hole 3, the lower sealing rod 9 is fixedly connected to one side surface of the sealing block 8 and slides in the sealing groove 7, the two first spring grooves 10 are respectively arranged on two side inner walls of the sealing groove 7, the two slide bar sliding grooves 11 are respectively arranged on two side inner walls of the two first spring grooves 10, the two fixing slots 40 are respectively arranged on the side inner walls of the sealing block 8 and are respectively communicated with the two slide bar sliding grooves 11, the two first spring plates 12 are respectively and slidably connected in the two first spring grooves 10, the two fixing inserting rods 13 are respectively and fixedly connected to one side ends of the two first spring plates 12 and respectively slide in the two slide bar sliding grooves 11, and two ends of the plurality of first telescopic springs 14 are respectively and fixedly connected to one side ends of the two first spring plates 12 and one side inner wall of the two first spring grooves 10;
the throttle subassembly, the throttle subassembly is equipped with two sets of, and two sets of throttle subassemblies are all located in the sampling valve 2 and are used for throttle sampling.
In the specific embodiment of the invention, a sampling valve 2 is fixed on an oil wellhead 1, a sampling flow hole 3 and a sealing block 8 are arranged in the sampling valve 2 to switch the sampling valve 2, a telescopic rod 6 and a lower sealing rod 9 are respectively blocked at the upper end and the lower end of a sealing groove 7 to enable the sealing groove 7 to be in a sealing state, a fixed slot 40 is arranged on the inner wall of one side of the sealing block 8 and communicated with a sliding rod chute 11, the telescopic rod 6 is connected with a switch assembly, the switch assembly drives the telescopic rod 6 to move up and down, a handle 21 is screwed to pull the telescopic rod 6 upwards, the total amount of gas in the sealing groove 7 is unchanged, the sealing groove 7 is in a sealing state, the lower air pressure in the sealing groove 7 is reduced when the telescopic rod 6 moves upwards, the lower air pressure in the sealing groove 7 is used for adsorbing the lower sealing rod 9 upwards and driving the sealing block 8 to slide upwards along with the continuous movement of the telescopic rod 6, the sampling flow hole 3 is in an open state at the moment, the fixed inserting rod 13 is propped against one side inner wall of the sealing block 8, the first telescopic spring 14 is in a stretched state, the first spring plate 12 divides the first spring groove 10 into two sections of spaces, the first spring plate 12 blocks the inside of the first spring groove 10 so that air does not circulate on the left side and the right side, when the sampling flow hole 3 needs to be closed, the telescopic rod 6 is pressed down by rotating the handle 21, the adsorption force of air pressure in the sealing groove 7 is insufficient to support the lower sealing rod 9 after the telescopic rod 6 slides downwards, the sealing block 8 slides downwards until the sealing block 8 is inserted into the sampling flow hole 3 to close the sampling flow hole 3, at the moment, the fixed slot 40 in the sealing block 8 is opposite to the opening of the sliding rod chute 11 in the inner hanging rod 4, the first telescopic spring 14 in the stretched state is rebounded, the first spring plate 12 is pulled to insert the fixed inserting rod 13 into the fixed slot 40 to fix the sealing block 8, at this time, the telescopic rod 6 continuously moves downwards to slide into the sealing groove 7 to increase the air pressure in the sealing groove 7, so that the high air pressure in the sealing groove 7 applies pressure to the upper end of the lower sealing rod 9, the sealing block 8 closes the sampling flow hole 3 through the fixed inserted rod 13 and the pressure in the sealing groove 7, when the sampling flow hole 3 needs to be opened for petroleum sampling, the rotary handle 21 drives the telescopic rod 6 to slide back into the telescopic groove 5 and continue to slide upwards so as to reduce the air pressure in the sealing groove 7, when the telescopic rod 6 slides to a height capable of upwards absorbing the lower sealing rod 9, the sealing block 8 is fixed and cannot move upwards due to the insertion of the fixed inserted rod 13 into the fixed slot 40, the telescopic rod 6 continuously slides upwards, at this time, the pressure difference between the low air pressure in the sealing groove 7 and the air pressure in the space at the other side of the first spring plate 12 is overlarge, and the absorption force to the first spring plate 12 is larger than the rebound force of the first telescopic spring 14, the first spring plate 12 is pushed by the left-right air pressure difference of the first spring plate 12 to push the first spring plate 12 and stretch the first telescopic spring 14 to drive the first spring plate 12 to slide towards one side of the sealing groove 7 and pull the fixed inserting rod 13 out of the fixed slot 40 in the sealing block 8, when the fixed inserting rod 13 is completely pulled out of the fixed slot 40, the air pressure in the sealing groove 7 is far lower than the air pressure value capable of upwards adsorbing the lower sealing rod 9, the lower sealing rod 9 is adsorbed and rapidly slid upwards to drive the sealing block 8 to slide upwards to open the sampling flow hole 3, petroleum flows into the sampling valve 2 to sample, the first telescopic spring 14 is in a stretched state until the next closing state, after the air pressure in the sealing groove 7 is low enough to adsorb the first spring plate 12 and pull the fixed inserting rod 13 out of the critical value of the fixed slot 40 through the sealing block 8, the fixing of the sealing block 8 is released, the sealing block 8 is quickly lifted, the scouring of high-speed fluid to the lower end of the sealing block 8 in a period from a closed state to the incomplete opening of the valve body is further reduced, and the overall service life of the valve body is prolonged.
Referring to fig. 1-9, a switch assembly is disposed in the sampling valve 2, the switch assembly includes a screwing groove 15, a limiting rotating groove 16, a screwing block 17, a limiting rotating plate 18, a threaded plate 19, a first threaded groove 20 and a handle 21, the screwing groove 15 is disposed at an upper end of the sampling valve 2 and is communicated with the telescopic groove 5, the limiting rotating groove 16 is disposed at a circumferential inner wall of the screwing groove 15, the screwing block 17 is rotationally connected in the screwing groove 15, the limiting rotating plate 18 is fixedly connected to a circumferential surface of the screwing block 17 and rotates in the limiting rotating groove 16, the first threaded groove 20 is disposed at a lower end of the screwing block 17, the threaded plate 19 is fixedly connected to an upper end of the telescopic groove 5 and is in threaded connection with the first threaded groove 20, and the handle 21 is fixedly connected to an upper end of the screwing block 17.
In this embodiment: the surface of the screw plate 19 is provided with threads and is fixed with the upper end of the telescopic rod 6, the screw block 17 rotates in the screw groove 15, the limiting rotating plate 18 on the surface of the screw block 17 rotates in the limiting rotating groove 16 to limit the screw block 17, the screw block 17 can only rotate in the screw groove 15, the screw plate 19 is arranged in the first screw groove 20 and is in threaded connection with the first screw groove 20, the telescopic rod 6 is in a long strip shape, the telescopic rod 6 cannot rotate in the telescopic groove 5 so as to limit the screw plate 19 to rotate, when the sampling flow hole 3 needs to be opened or closed, the handle 21 is rotated and drives the screw block 17 to rotate, the screw plate 19 cannot rotate, and when the screw block 17 rotates, the screw plate 19 is driven to move up and down in the first screw groove 20, so that the height of the telescopic rod 6 and the air pressure in the sealing groove 7 are changed, and the switch of the sampling flow hole 3 is controlled.
Referring to fig. 1-9, each group of throttling assembly includes a throttling through hole 22, a closing groove 41, a closing plate 23, a pulling groove 24, a pulling rod 25, a sliding groove 26, a second spring groove 27, a pushing chute 28, a sliding rod 29, a second spring plate 30, a second telescopic spring 31 and a pushing slider 32, wherein the throttling through hole 22 is relatively opened on the side surface of the sampling flow hole 3, the closing groove 41 is opened on one side inner wall of the throttling through hole 22, the closing plate 23 is rotatably connected to one side inner wall of the closing groove 41 through a rotating shaft, the pulling groove 24 is opened on one side end of the closing plate 23, the pulling rod 25 is slidably connected in the pulling groove 24, the sliding groove 26 is opened on one side inner wall of the closing groove 41, the sliding groove 26 is communicated with the second spring groove 27, the pushing chute 28 is opened on one side inner wall of the sampling flow hole 3 and is communicated with the second spring groove 27, the sliding rod 29 is fixedly connected to one side end of the pulling rod 25 and slides in the sliding groove 26, the second spring plate 30 is fixedly connected to the circumference surface of the sliding rod 29 and slides in the second spring groove 27, the second spring plate 31 is sleeved on the second spring 31 and is fixedly connected to the other end of the sliding chute 29.
In this embodiment: the throttle assembly is provided with two groups, one side of the closing plate 23 is fixed on one side of the closing groove 41 through a rotating shaft, the other side is propped against the inner wall of one side of the throttle through hole 22 to enable the closing plate 23 to close the upper end and the lower end of the throttle through hole 22, the closing plate 23 is connected with the sliding rod 29 through the pulling groove 24 and the pulling rod 25, the closing plate 23 is rotated by the sliding of the pulling rod 25 in the pulling groove 24 when the sliding rod 29 slides laterally, when the sampling flow hole 3 is closed, the sealing block 8 slides downwards and contacts with the upper end of the pushing slide block 32, the contact surface between the pushing slide block 32 and the sealing block 8 is an inclined surface, the sealing block 8 extrudes the pushing slide block 32 to slide into the pushing slide groove 28 completely, and pushes the slide lever 29 to rotate the upper end of the closing plate 23 toward the one side inner wall of the throttle through-hole 22, and finally against the inner wall of one side of the throttle through-hole 22 to close the upper opening of the throttle through-hole 22, and drives the second spring plate 30 to stretch the second expansion spring 31 when the sliding rod 29 slides, then pushes the sliding block 32 to be propped against one end of the sealing block 8 so as to ensure that the second expansion spring 31 cannot rebound, and when the sampling flow hole 3 needs to be opened, the sealing block 8 is slid over the push slide 32, at which time the sealing block 8 has not been slid completely out of the sampling flow bore 3 to open the sampling flow bore 3, and as the fixing restriction of the pushing slider 32 of the upward movement of the sealing block 8 is released, the second expansion spring 31, which was previously stretched, rebounds, pulling the closing plate 23 to open the opening of the throttle through-hole 22, before the sealing block 8 fully opens the sampling flow hole 3, a part of the petroleum fluid flows into the sampling valve 2 from the open throttle hole 22, thereby allowing the restriction assembly to divide the sampling flow bore 3 and further reducing the impact of fluid on the lower end of the sealing block 8 from the time the sampling flow bore 3 is opened.
Referring to fig. 1-9, an upper inner wall of the sealing groove 41 is fixedly connected with a fitting block 33.
In this embodiment: the laminating piece 33 matches with the upper end of closure plate 23, drives closure plate 23 to rotate at the resilience of second telescopic spring 31 and opens throttle through-hole 22 after, one side of closure plate 23 is pulled by second telescopic spring 31 and is contacted with laminating piece 33, seals the one side end of closure groove 41, avoids fluid impurity to flow into and causes the jam in the sliding tray 26.
Referring to fig. 1-9, an upper seal ring 34 is fixedly connected to the upper end of the seal block 8.
In this embodiment: the upper sealing ring 34 is arranged at the upper end of the sealing block 8 and slides along the outer surface of the inner hanging rod 4 along with the sealing block 8, and when the sealing block 8 slides upwards, the upper sealing ring 34 wipes crude oil impurities on the surface of the inner hanging rod 4, so that the influence on the sliding of the sealing block 8 is avoided.
Referring to fig. 1-9, a lower sealing ring 35 is fixedly connected to the lower inner wall of the sampling valve 2.
In this embodiment: the upper inner wall of the sampling valve 2 is arranged on the lower sealing ring 35, after the sampling flow hole 3 is closed by the sealing block 8, the lower sealing ring 35 is tightly attached to the outer surface of the sealing block 8 to form a second seal, so that the sealing block 8 is ensured not to leak fluid after the sampling flow hole 3 is closed.
Referring to fig. 1-9, a drainage groove 36 is formed in the upper inner wall of the sampling valve 2.
In this embodiment: the drainage groove 36 is formed in the upper inner wall of the sampling valve 2, the inner wall of the drainage groove is arc-shaped, when the sealing block 8 is opened, high-pressure fluid upwards impacts into the drainage groove 36, vortex deceleration is generated by guiding the fluid through the arc-shaped inner wall of the drainage groove 36, and therefore the flow velocity of the fluid with smaller oil mass in the sampling valve 2 for petroleum sampling is reduced, and the phenomenon that the petroleum is splashed outwards due to the fact that the petroleum flow velocity impacts the sampling bottle 39 too fast is avoided.
Referring to fig. 1-9, a drainage tube 37 is fixedly connected to one side end of the sampling valve 2, a second thread groove 38 is formed in the lower end of the drainage tube 37, and a sampling bottle 39 is connected to the second thread groove 38 in a threaded manner.
In this embodiment: the drainage tube 37 is used for draining petroleum for sampling, the second thread groove 38 at the lower end of the drainage tube 37 is matched with the thread at the bottle mouth of the sampling bottle 39, the sampling bottle 39 is screwed into the second thread groove 38 to fix the sampling bottle 39 before sampling, and then petroleum flows into the sampling bottle 39 from the sampling valve 2, so that pollution caused by splashing due to too fast fluid flow rate can be avoided.
Referring to fig. 1-9, a connecting hole is formed at the lower end of the inner hanging rod 4 and the screwing groove 15.
In this embodiment: the lower end of the inner hanging rod 4 is provided with a connecting hole, so that a space between the sealing block 8 and the lower sealing rod 9, which is sealed by the inner hanging rod 4, is communicated with the screwing groove 15, and the air pressure between the lower sealing rod 9 and the sealing block 8 cannot be changed due to the movement of the sealing block 8, so that the up-and-down movement of the sealing block 8 is not influenced.
The working principle and the using flow of the invention are as follows: when the sampling flow hole 3 needs to be closed, the telescopic rod 6 is pressed down by the rotating handle 21, after the telescopic rod 6 slides down, the low-pressure adsorption force in the sealing groove 7 is insufficient to adsorb the lower sealing rod 9, the sealing block 8 slides down due to the gravity of the sealing block 8, the fixed inserting rod 13 is propped against the inner wall of the sealing block 8, when the fixed inserting groove 40 in the sealing block 8 is opposite to the opening of the sliding rod sliding groove 11 in the inner hanging rod 4, the fixed inserting rod 13 is inserted into the fixed inserting groove 40 due to the contraction force of the first telescopic spring 14, the sealing block 8 is fixed with the inner hanging rod 4, the sealing block 8 is inserted into the sampling flow hole 3 to block the opening of the sampling flow hole 3, the telescopic rod 6 continuously moves down to slide into the sealing groove 7 to increase the air pressure in the sealing groove 7, so that the high air pressure in the sealing groove 7 applies pressure to the upper end of the lower sealing rod 9, when the sampling flow hole 3 is required to be opened for petroleum sampling, the handle 21 is rotated to drive the telescopic rod 6 to slide back into the telescopic groove 5, the air pressure in the sealing groove 7 is reduced by continuing to slide the telescopic rod 6 upwards, when the telescopic rod 6 slides to a height capable of sucking the lower sealing rod 9 upwards, the sealing block 8 is fixed and cannot move upwards due to the fact that the fixed inserting rod 13 is inserted into the fixed inserting groove 40, the telescopic rod 6 continues to slide upwards, the air pressure in the sealing groove 7 is further reduced, when the adsorption force of the first spring plate 12 is larger than the resilience force of the first telescopic spring 14, the first telescopic spring 14 is stressed to drive the first spring plate 12 to slide towards one side of the sealing groove 7 and pull the fixed inserting rod 13 out of the fixed inserting groove 40, and when the fixed inserting rod 13 is completely pulled out of the fixed inserting groove formed in the sealing block 8, the lower sealing rod 9 is adsorbed upwards to drive the sealing block 8 to slide upwards, so that the sampling flow hole 3 is opened for sampling, the air pressure in the sealing groove 7 is reduced to a critical value capable of adsorbing and pulling the first spring plate 12, the fixed inserting rod 13 is pulled out, the fixing of the sealing block 8 is further relieved, the sealing block 8 is lifted up quickly, the flushing time of high-speed fluid to the lower end of the sealing block 8 is shortened, and the first telescopic spring 14 is in a stretched state until the next sampling flow hole 3 is closed because the fixed inserting rod 13 butts against one side inner wall of the sealing block 8.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
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