CN110686930A - Automatic storage tank sampling system with multifunctional tunnel valve and sampling method - Google Patents
Automatic storage tank sampling system with multifunctional tunnel valve and sampling method Download PDFInfo
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- CN110686930A CN110686930A CN201811160536.4A CN201811160536A CN110686930A CN 110686930 A CN110686930 A CN 110686930A CN 201811160536 A CN201811160536 A CN 201811160536A CN 110686930 A CN110686930 A CN 110686930A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N2001/1031—Sampling from special places
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N2001/1087—Categories of sampling
- G01N2001/1093—Composite sampling; Cumulative sampling
Abstract
The invention discloses an automatic storage tank sampling system with a multifunctional tunnel valve and a sampling method. The automatic sampling system comprises a pneumatic pump, a multifunctional tunnel valve, a sampler and a plurality of sampling connecting ends connected with a tank to be sampled, wherein the multifunctional tunnel valve comprises a valve seat and a valve core; the valve seat is provided with a plurality of branch flow channels and a confluence flow channel, the valve core is provided with a plurality of passages and a circulating part, and one end of each passage is communicated with the circulating part; each branch flow channel on the valve seat corresponds to the sampling connecting end one by one, and each sampling connecting end is connected with the corresponding branch flow channel on the valve seat; the confluence flow channel of the valve seat is respectively communicated with one of the sampling branch and the replacement branch through a working condition conversion valve, the pneumatic pump is installed on the replacement branch, and the sampler is installed on the sampling branch. Therefore, the invention can ensure to collect representative sample medium, and can realize pump sampling and multi-point mixed sampling, thereby reducing sampling danger and ensuring convenient sampling process.
Description
Technical Field
The invention belongs to the field of oil product sampling, and particularly relates to an automatic storage tank sampling system with a multifunctional tunnel valve and a sampling method.
Background
The traditional oil product storage tank sampling mode is manual tank climbing operation, the sampling accuracy is difficult to control, and the sample accuracy is not high; the labor intensity of operators is high, and the sampling time is long; the sampling on the tank in the weather of rain, snow, strong wind and the like is extremely unsafe, and meanwhile, volatile and toxic harmful gases can cause harm to operators when the tank top is used for sampling, do not meet the relevant requirements in the manual petroleum liquid sampling method, and have great pollution to the environment.
Although the currently applied storage tank sampler realizes that samples at different point positions in the tank can be directly sampled under the tank without climbing the tank, the safety risk in the operation process of personnel is reduced, and meanwhile, the sampler is ensured to collect representative sample media, but the requirements of closeness and zero emission in the sampling process are not met, and the sampler still can cause harm to personnel and pollution to the environment; meanwhile, the currently applied storage tank sampler has more control valves and is complex to operate.
Disclosure of Invention
The invention aims to solve the technical problem of providing an automatic storage tank sampling system with a multifunctional tunnel valve and a sampling method aiming at the defects of the background art, which can ensure that a sampler collects a representative sample medium on one hand, and can realize pump-on sampling and multi-point mixed sampling on the other hand, thereby reducing the sampling risk and ensuring the environmental protection of the sampling process; furthermore, the multifunctional tunnel valve is arranged between the sampling point and the sampler, and single-point sampling or multi-point mixed sampling can be completed by controlling one valve body of the multifunctional tunnel valve, so that the operation is convenient, the whole sampling flow path is simplified, the later-stage flow path overhaul and maintenance are facilitated, and meanwhile, the cleaning of old samples in each sampling flow path can be completed at one time, and the operation time is reduced.
The invention adopts the following technical scheme for solving the technical problems:
a storage tank automatic sampling system with a multifunctional tunnel valve comprises a power pump, the multifunctional tunnel valve, a sampler and a plurality of sampling connecting ends connected with a tank to be sampled, wherein the multifunctional tunnel valve comprises a valve seat and a valve core, the valve seat is internally provided with a valve cavity, and the valve core is arranged in the valve cavity; the valve seat is provided with a plurality of branch flow channels and a confluence flow channel, the valve core is provided with a plurality of passages and a circulating part, and one end of each passage is communicated with the circulating part; wherein:
each branch flow channel on the valve seat corresponds to the sampling connecting end one by one, and each sampling connecting end is connected with the corresponding branch flow channel on the valve seat;
any branch flow channel on the valve seat can be directly butted and communicated with one passage on the valve core; when any branch flow channel on the valve seat is in butt joint communication with the corresponding passage on the valve core, the confluence flow channel on the valve seat can also be communicated with the circulation part on the valve core;
all branch flow channels on the valve seat can be directly and simultaneously communicated with the communicating part on the valve core through the passage; when all branch flow channels on the valve seat are communicated with the circulating part on the valve core at the same time, the confluence flow channel on the valve seat can also be communicated with the circulating part on the valve core;
the confluence flow channel of the valve seat is externally connected with two branches through the working condition conversion valve, one branch is a sampling branch, a sampler is arranged on the sampling branch, the other branch is a replacement branch, the power pump is arranged on the replacement branch, and the confluence flow channel of the valve seat can be connected with the to-be-sampled tank through a liquid path of the working condition conversion valve and the power pump in sequence.
As a further improvement of the invention, the sampler is a closed sampler and comprises a sampling bottle and a three-way valve group, wherein the sampling bottle is provided with an oil inlet joint and an exhaust joint; the three-way valve group comprises an oil inlet valve and an exhaust valve which are three-way valves; two inlets and one outlet of the oil inlet valve: the inlet of the oil inlet valve is connected with the outlet of the multifunctional tunnel valve, and the outlet of the oil inlet valve is connected with an oil inlet joint; two outlet valves and one inlet valve: the air inlet of the exhaust valve is connected with an exhaust joint, the outlet of the exhaust valve is connected with an adsorption tank, and the outlet II of the exhaust valve is connected with the inlet II of the oil inlet valve.
As a further improvement of the invention, the three-way valve group is provided with a linkage device, when the linkage device is driven to a sampling position, the outlet of the oil inlet valve is communicated with the inlet of the oil inlet valve, and meanwhile, the inlet of the exhaust valve is communicated with the outlet of the exhaust valve; when the linkage device is driven to the vacant discharge position, the outlet of the oil inlet valve is communicated with the inlet II, and meanwhile, the inlet and the outlet of the exhaust valve are communicated.
As a further improvement of the invention, the multifunctional tunnel valve is of a ball type structure, the valve cavity and the valve core of the valve seat are both spherical, and the valve core is of a hollow structure and is provided with an internal cavity; the circulating part of the valve core is the inner cavity of the valve core; each passage of the valve core radially penetrates through the periphery of the inner cavity of the valve core along the radial direction of the valve core;
when any branch flow channel on the valve seat is directly butted and communicated with the corresponding passage on the valve core, the confluence flow channel on the valve seat can also be directly communicated with the circulating part on the valve core through one of the rest passages on the valve core;
all branch flow channels on the valve seat can be directly communicated with the circulation part through different passages on the valve core in a one-to-one butt joint mode, and when all branch flow channels on the valve seat are communicated with corresponding passages on the valve core in a butt joint mode, the confluence flow channel on the valve seat can also be directly communicated with the circulation part on the valve core through one of the rest passages on the valve core.
As a further improvement of the invention, the multifunctional tunnel valve is of a column type structure, and the valve cavity and the valve core of the valve seat are both cylindrical; wherein:
the valve core has one flow part with flow groove on one side and the flow channels on the opposite side; the circulation groove can form a sealed circulation cavity with the cavity wall of the valve cavity;
one end of each branch flow channel on the valve seat, which is adjacent to the valve core passage, is arranged on one side of the valve seat in a row along the length direction of the valve seat, and the confluence flow channel of the valve seat is arranged on the other side of the valve seat and is directly communicated with the circulation cavity;
the passages on the valve core are divided into two types, wherein one type comprises a plurality of passages a, and the other type comprises a passage b; wherein:
each passage a is respectively arranged corresponding to each branch flow channel on the valve seat one by one, the adjacent end of each passage a and the corresponding branch flow channel on the valve seat are arranged at the same height, and the adjacent end of each passage a and the upper flow channel on the valve seat are in staggered projection in the vertical direction; each branch passage on the valve seat can be directly communicated with the circulating cavity through the corresponding passage a;
the passage b is in a kidney-shaped hole shape and is arranged along the length direction of the valve core, the uppermost part of the kidney-shaped hole end of the passage b is higher than the position of the passage a at the uppermost part, and the lowermost part of the kidney-shaped hole end of the passage b is lower than the position of the passage a at the lowermost part; each branch passage on the valve seat can communicate with the circulation chamber directly through the passage b at the same time.
As a further improvement of the invention, the multifunctional tunnel valve is a four-way valve, three branch flow channels on the valve seat are provided, namely a channel I, a channel II and a channel III, and only one confluence flow channel on the valve seat is a main channel; the sampling connecting ends are also three, namely a sampling connecting end I, a sampling connecting end II and a sampling connecting end III; the sampling connecting end is connected with the first connecting channel, the sampling connecting end is connected with the second connecting channel, and the sampling connecting end is connected with the third connecting channel.
As a further improvement of the invention, when the multifunctional tunnel valve is a ball-type four-way valve, eight paths are arranged on the valve core along the circumferential direction of the valve core, wherein the eight paths are respectively a path I, a path II, a path III, a path IV, a path V, a path VI, a path VII and a path VIII;
each tributary passageway and conflux channel all are in the coplanar on the disk seat, wherein: the included angle between the first channel and the second channel is 105 degrees, the included angle between the second channel and the third channel is 90 degrees, and the included angle between the third channel and the total channel is 90 degrees;
the eight passages of the valve core and the four passages of the valve seat are all in the same plane, the included angle between the first passage and the second passage, the included angle between the second passage and the third passage, the included angle between the third passage and the fourth passage, and the included angle between the fifth passage and the sixth passage are all 30 degrees, the included angle between the fourth passage and the fifth passage, the included angle between the sixth passage and the seventh passage are 45 degrees, the included angle between the seventh passage and the eighth passage is 60 degrees, and the included angle between the eighth passage and the first passage is 90 degrees;
when the multifunctional tunnel valve is a column type four-way valve, a first channel, a second channel and a third channel on the valve seat are uniformly arranged on one side of the valve seat along the vertical direction, and the main channel is arranged on the other side of the valve seat; the valve core is provided with three passages a which are respectively a first passage, a second passage and a third passage, the valve core is provided with a passage b which is a fourth passage, the first passage and the first channel are at the same height, the second passage and the second channel are at the same height, and the third passage and the third channel are at the same height.
The invention also aims to provide an automatic closed storage tank sampling method, which comprises the following steps:
step one, an oil inlet joint and an exhaust joint of a sampling bottle are respectively connected with an oil outlet of an oil inlet valve and an air inlet of an exhaust valve;
step two, replacing the old oil in the sampling pipeline
Step 2.1, the multifunctional tunnel valve is moved to a position changing/mixed mining position, and the position changing/mixed mining position is in a full-through state of the multifunctional tunnel valve; at the moment, a confluence flow channel of the multifunctional tunnel valve is communicated with the power pump and is cut off from the oil inlet valve;
2.2, starting the power pump, sucking oil in the to-be-sampled tank into a liquid path of the power pump from the three sampling connecting ends, then introducing the oil into the to-be-sampled tank, performing pipeline replacement, stopping the power pump after the requirement of complete replacement of the old oil in the pipeline is met, controlling a working condition change-over valve, and cutting off a flow path between the multifunctional tunnel valve and the power pump;
step three, sampling
Point mining or mixed mining can be realized by controlling the multifunctional tunnel valve;
the point picking process comprises the following specific steps:
3.1.1, moving the multifunctional tunnel valve to a sampling point position corresponding to the oil product at the required sampling connecting end, then adjusting the working condition conversion valve to a sampling station, moving the linkage device of the sampler to the sampling position, allowing the oil product at the required sampling connecting end to flow into a sampling bottle through the multifunctional tunnel valve, the three-way joint and the oil inlet valve in sequence under the action of gravity, and discharging air in the sampling bottle to an adsorption tank through an exhaust valve;
3.1.2, after the flow valve between the multifunctional tunnel valve and the sampling connecting end displays that the oil sampling amount meets the requirement, closing the multifunctional tunnel valve, moving a linkage device of the sampler to an emptying position, communicating an exhaust port of the sampling bottle with an air inlet channel of an oil inlet valve through an air conveying channel of the emptying valve, emptying residual oil in a pipeline behind the oil inlet valve, and finishing point sampling of the sampling connecting end;
the concrete process of mixed mining is as follows:
3.2.1, adjusting the opening degree of a flow valve between the multifunctional tunnel valve and each sampling connecting end according to the proportion of oil products at each collecting position in mixed sampling;
3.2.2, moving the multifunctional tunnel valve to a position changing/mixed sampling position, then moving a linkage device of the sampler to the sampling position, wherein oil collected from each sampling connecting end flows into a sampling bottle through the multifunctional tunnel valve, the three-way joint and the oil inlet valve in sequence under the action of gravity, and air in the sampling bottle is discharged to the adsorption tank through the emptying valve;
3.2.3, after the flow valve between multi-functional tunnel valve and the sampling link shows that the oil sampling volume reaches the requirement, close multi-functional tunnel valve to move the aggregate unit of sample thief to the evacuation position, the gas transmission passageway of sampling bottle passes through the exhaust valve communicates with the inlet channel of inlet valve, empties the residual oil in the pipeline behind the inlet valve, accomplishes the mixed mining of each sampling site.
As a further refinement of the invention, the sampling time in step 2.2 lasts one minute, and the power pump is turned off after one minute.
As a further development of the invention, in steps 3.1.2, 3.2.3, the evacuation time lasts 0.5 minutes
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
1. the multifunctional tunnel valve is assembled in the sampling flow path, so that point sampling at different sites of an oil product or mixed sampling at a plurality of sites can be realized by controlling the same valve; therefore, the invention integrates a plurality of control valves, simplifies the operation steps, clarifies the operation flow, avoids misoperation and is beneficial to later-stage flow path overhaul and maintenance.
2. The invention disposes and replaces the branch road in the sampling flow path, can finish sampling the flow path effectively, especially sample the site from the oil storage tank and sample the old oil displacement of the pipeline of a section up to several meters, even ten meters in the multi-functional tunnel valve at most, carry on "washing" to the pipeline, discharge the residue in the pipeline, let the pipeline fill with the fresh oil, thus improve the purity of the sampled oil, the oil that the pipeline replaces is sent into and waits to sample the pot again by the power pump, will not produce the waste; meanwhile, due to the arrangement of the multifunctional tunnel valve, the invention can complete the cleaning of the old samples in each sampling flow path at one time, thereby reducing the operation time.
3. The power pump is assembled on the replacement branch and is positioned at the rear end of the multifunctional tunnel valve, so that the pump opening sampling can be realized during sampling, namely the sampling of the invention is completed only by the gravity of the sampled oil product without the power provided by the power pump, and the sampling safety can be effectively ensured.
4. The sampler adopts a closed sampler, and can realize closed sampling in the whole process by assembling the exhaust valve, thereby improving the safety and environmental protection of the sampling process and avoiding the damage of toxic and harmful gases to personnel and environment.
Drawings
FIG. 1 is a schematic overall structure diagram according to a first embodiment;
FIG. 2 is a schematic structural view of a second embodiment of the present invention in a fully closed state of a valve;
FIG. 3 is a schematic structural view of a second embodiment of the present invention, with the valve fully open;
FIG. 4 is a schematic structural diagram of the second embodiment in which the first channel is in communication with the main channel;
FIG. 5 is a schematic structural view illustrating a second passage in communication with a main passage according to a second embodiment of the present invention;
FIG. 6 is a schematic structural view of a second embodiment in which a third passage communicates with a main passage;
FIG. 7 is a front view of the third embodiment of the present invention in a fully closed state of the valve;
FIG. 8 is a right side view of FIG. 7;
FIG. 9 is a front view of the valve cartridge of the third embodiment;
fig. 10 is a rear view of the valve cartridge of the third embodiment.
Embodiment one, 6, a tank to be sampled; 61. a sampling connecting end; 62. a multifunctional tunnel valve; 63. an oil inlet valve; 631. a linkage device; 64. an exhaust valve; 65. a sampling bottle; 66. a power pump; 67. an air control valve; 68. and (4) an adsorption tank.
Example two, 1, valve seat; 11. a first channel; 12. a second channel; 13. a third channel; 14. a main channel; 2. a valve core; 21. a first passage; 22. a second path; 23. a third path; 24. a fourth path; 25. a fifth path; 26. a sixth path; 27. a seventh path; 28. and a passage eight.
Example three, 1, valve seat; 11. a first channel; 12. a second channel; 13. a third channel; 14. a main channel; 2. a valve core; 301. a circulation tank; 302. a handle; 31. a first path; 32. a second path; 33. a third path; 34. a fourth path.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
in the first embodiment, a storage tank automatic sampling system with a multifunctional tunnel valve is shown in fig. 1 to 10, and includes a power pump 66, a multifunctional tunnel valve 62, a sampler, and a plurality of sampling connection ends 61 connected to a tank 6 to be sampled, where the multifunctional tunnel valve 62 includes a valve seat 1 and a valve core 2, a valve cavity is disposed in the valve seat 1, and the valve core 2 is disposed in the valve cavity; the valve seat 1 is provided with a plurality of branch flow channels 11/12/13 and a confluence flow channel 14, the valve core is provided with a plurality of passages and a circulating part, and one end of each passage is communicated with the circulating part; wherein:
each branch flow channel on the valve seat 1 corresponds to the sampling connecting end 61 one by one, and each sampling connecting end 61 is connected with the corresponding branch flow channel on the valve seat 1; as shown in the figure, the multifunctional tunnel valve 62 is located below the sampling connection end 61, and the connection pipeline between each sampling connection end 61 and the corresponding branch flow channel on the valve seat 1 is vertically arranged.
Any branch flow channel on the valve seat 1 can be directly butted and communicated with one passage on the valve core 2; when any branch flow channel on the valve seat 1 is in butt joint communication with a corresponding passage on the valve core 2, the confluence flow channel on the valve seat 1 can also be communicated with a circulating part on the valve core 2;
all branch flow channels on the valve seat 1 can be directly and simultaneously communicated with the communicating part on the valve core 2 through a passage; when all branch flow channels on the valve seat 1 are communicated with the circulating part on the valve core 2 at the same time, the confluence flow channel on the valve seat 1 can also be communicated with the circulating part on the valve core 2;
the confluence flow channel of the valve seat 1 is externally connected with two branches through a three-way joint, wherein one branch is a sampling branch, a sampler is arranged on the sampling branch, and in the attached drawing, the sampler is positioned below the multifunctional tunnel valve, and the sampling branch is a pipeline vertically arranged; the other branch is a replacement branch, the power pump 66 is installed on the replacement branch, the confluence flow channel of the valve seat 1 can be connected with the to-be-sampled tank 6 through a three-way connector and a liquid channel of the power pump 66 in sequence, the power pump 66 is a pneumatic pump, and a gas channel of the pneumatic pump is connected with a compressed gas source through a control valve.
In this embodiment, the multifunctional tunnel valve 66 is of a ball structure, the valve cavity of the valve seat 1 and the valve core 2 are both of a ball shape, and the valve core 2 is of a hollow structure and has an internal cavity; the flow part of the valve core 2 is an internal cavity of the valve core; each passage of the valve core 2 radially penetrates and is arranged at the periphery of the inner cavity of the valve core 2 along the radial direction of the valve core 2;
when any branch flow channel on the valve seat 1 is directly butted and communicated with the corresponding passage on the valve core 2, the confluence flow channel on the valve seat 1 can also be directly communicated with the circulating part on the valve core 2 through one of the rest passages on the valve core 2;
all branch flow channels on the valve seat 1 can be directly communicated with the circulation part through different passages on the valve core 2 in a one-to-one butt joint mode, and when all branch flow channels on the valve seat 1 are communicated with corresponding passages on the valve core 2 in a butt joint mode, the confluence flow channel on the valve seat 1 can also be directly communicated with the circulation part on the valve core 2 through one of the rest passages on the valve core 2.
In this embodiment, the multifunctional tunnel valve may also be a column structure, and at this time, the valve cavity of the valve seat 1 and the valve core 2 are both cylindrical; wherein:
the flow part of the valve core 2 is a flow groove 301 arranged at one side of the valve core 2, and each passage of the valve core 2 is arranged at the opposite side of the flow groove 301; the circulation groove 301 can form a sealed circulation cavity with the cavity wall of the valve cavity;
one end of each branch flow channel on the valve seat 1, which is adjacent to the valve core 2 passage, is arranged on one side of the valve seat 1 in a row along the length direction of the valve seat 1, and the confluence flow channel of the valve seat 1 is arranged on the other side of the valve seat 2 and is directly communicated with the circulation cavity;
the passages on the valve core 2 are divided into two types, wherein one type comprises a plurality of passages a, and the other type comprises a passage b; wherein:
each passage a is respectively arranged corresponding to each branch flow channel on the valve seat 1 one by one, the adjacent end of each passage a and the corresponding branch flow channel on the valve seat 1 are arranged at the same height, and the projections of the adjacent ends of the passages a and the branch flow channels on the valve seat 1 in the vertical direction are staggered; each branch channel on the valve seat 1 can be directly communicated with the circulating cavity through a corresponding passage a;
the passage b is in a kidney-shaped hole shape and is arranged along the length direction of the valve core 2, the uppermost part of the kidney-shaped hole end of the passage b is higher than the position of the passage a at the uppermost part, and the lowermost part of the kidney-shaped hole end of the passage b is lower than the position of the passage a at the lowermost part; the branch passages on the valve seat 1 can communicate with the flow chamber directly through the passage b at the same time.
In the invention, the multifunctional tunnel valve is a four-way valve, three branch flow channels on the valve seat are respectively a channel I11, a channel II 12 and a channel III 13, and only one confluence flow channel on the valve seat is a main channel 14; the sampling connecting ends 61 are also three, namely a sampling connecting end I, a sampling connecting end II and a sampling connecting end III; the sampling connecting end is connected with a first connecting channel 11, the sampling connecting end is connected with a second connecting channel 12, and the sampling connecting end is connected with a third connecting channel 13.
The sample thief is airtight sample thief, including the three-way valve group, is connected with sampling bottle 65 on the three-way valve group, is provided with oil feed joint and exhaust joint on the sampling bottle 65.
The three-way valve group comprises an oil inlet valve 63 and an exhaust valve 64 which are three-way valves, wherein the oil inlet valve 63 has two inlets and one outlet, the oil inlet is connected with the multifunctional tunnel valve 62, and the oil outlet is connected with an oil inlet joint; two air outlets of the exhaust valve 64 enter one air inlet, the air inlet is connected with an exhaust joint, the air outlet one air outlet is connected with an adsorption tank 68, and the air outlet two air outlet is connected with the oil inlet two. The oil inlet joint and the exhaust joint are both double self-closing joints.
The linkage 631 is arranged on the three-way valve group, when the linkage 631 hits a sampling position, an oil outlet of the oil inlet valve 63 is communicated with an oil inlet, and meanwhile, an air inlet of the exhaust valve 64 is communicated with an air outlet; when the linkage 631 hits the empty discharge position, the oil outlet of the oil inlet valve 63 is communicated with the second oil inlet, and meanwhile, the air inlet and the air outlet of the exhaust valve 64 are communicated. In particular, when the linkage 631 is opened to discharge the vacant position, a circulation loop is formed between the sampling bottles 65 of the oil inlet valve 63 and the exhaust valve 64, the sample oil in the oil inlet valve 63 and the pipeline flows into the sampling bottles 65 under the action of gravity, the pressure in the sampling bottles 65 is increased, air in the pipeline between the sampling bottles 65 and the exhaust valve 64 is pushed into the oil inlet valve 63, and the air moving into the oil inlet valve 63 assists in pushing the sample oil in the pipeline between the oil inlet valve 63 and the sampling bottles 65, so that the residual sample oil in the pipeline can completely enter the sampling bottles 65.
The invention also provides an automatic closed storage tank sampling method, which comprises the following steps:
step one, an oil inlet joint and an air outlet joint of the sampling bottle 65 are respectively connected with an oil outlet of the oil inlet valve 63 and an air inlet of the air outlet valve 64.
And step two, the multifunctional tunnel valve 62 is actuated to the replacement position, and the replacement position is the full-through state of the multifunctional tunnel valve 62.
And step three, opening the air control valve 67, starting the power pump 66, sucking oil in the tank to be sampled into the power pump 66 from the three sampling connecting ends 61, then introducing the oil into the tank to be sampled, performing pipeline replacement, wherein the pipeline replacement time lasts for one minute, closing the power pump 66 after one minute, and the pipeline replacement is used for enabling fresh oil in the tank to be sampled to enter a pipeline, filtering the pipeline, and filling the pipeline with the fresh oil, so that the purity of the sample is improved.
And step four, the multifunctional tunnel valve 62 is actuated to a sampling point I, namely the sampling connecting end 61I is communicated with the outlet of the multifunctional tunnel valve 62.
Step five, the linkage 631 is moved to a sampling position for independent sampling, and oil in the to-be-sampled tank 6 enters the sampling bottle 65 from the sampling connecting end 61 through the multifunctional tunnel valve 62.
Step six, after the oil in the sampling bottle 65 is sampled, the linkage 631 is moved to an emptying position, the residual oil in the pipeline is drained, the emptying time sequence is 0.5 minute, and then the sampling bottle 65 is taken down; the oil in the sampling bottle 65 is poured into a sampling barrel, and then the sampling bottle 65 and the sampler are connected again.
Step seven, sequentially communicating the multifunctional tunnel valve 62 with a sampling point II and a sampling point III; and repeating the fifth step and the sixth step, so that the second sampling point and the third sampling point are sequentially sampled, and the oil product is completely poured into the sampling barrel for detection of the oil product.
In addition, the invention can also realize mixed mining, and the concrete process of the mixed mining is as follows:
3.2.1, adjusting the opening degree of a flow valve between the multifunctional tunnel valve and each sampling connecting end according to the proportion of oil products at each collecting position in mixed sampling;
3.2.2, moving the multifunctional tunnel valve to a position changing/mixed sampling position, then moving a linkage device of the sampler to the sampling position, wherein oil collected from each sampling connecting end flows into a sampling bottle through the multifunctional tunnel valve, the three-way joint and the oil inlet valve in sequence under the action of gravity, and air in the sampling bottle is discharged to the adsorption tank through the emptying valve;
3.2.3, after the flow valve between multi-functional tunnel valve and the sampling link shows that the oil sampling volume reaches the requirement, close multi-functional tunnel valve to move the aggregate unit of sample thief to the evacuation position, the gas transmission passageway of sampling bottle passes through the exhaust valve communicates with the inlet channel of inlet valve, empties the residual oil in the pipeline behind the inlet valve, accomplishes the mixed mining of each sampling site.
The second embodiment is a ball type multifunctional tunnel valve, as shown in fig. 2, 3, 4, 5 and 6, which comprises a valve seat 1 and a valve core 2, wherein the valve core 2 is ball-shaped, and the valve cavity of the valve seat 1 is also ball-shaped. Be provided with four passageways on the disk seat 1, four passageways are in the coplanar, are passageway one 11, passageway two 12, passageway three 13 and total passageway 14 in proper order, the contained angle between passageway one 11 and the passageway two 12 is 105 degrees, and the contained angle between passageway two 12 and the passageway three 13 is 90 degrees, and the contained angle between passageway three 13 and the passageway four is 90 degrees.
The valve core 2 is rotatably arranged in the valve seat 1, eight passages are respectively arranged in the valve core 2 along the radial direction, the passages are a passage I21, a passage II 22, a passage III 23, a passage IV 24, a passage IV 25, a passage VI 26, a passage VII 27 and a passage VIII 28 in sequence, the eight passages are converged at the center of the valve core 2, the eight passages and the four channels are in the same plane, the included angles between the passage I21 and the passage II 22, the passage II 22 and the passage III 23, the included angles between the passage III 23 and the passage IV 24, the included angles between the passage IV 24 and the passage IV 25, the included angles between the passage VI 26 and the passage VII 27 are all 30 degrees, the included angles between the passage IV 24 and the passage VII 27 are 60 degrees, and the included angles between the passage VIII 28 and the passage I21 are 90 degrees.
When the valve core 2 is at the position shown in fig. 2 (i.e. the third channel 13 is in butt joint with the second channel 22), the valve core 2 is rotated clockwise by 30 degrees, and the first channel 11, the second channel 12 and the third channel 13 are all communicated with the main channel 14; clockwise rotation is performed for 30 degrees again, the first channel 11 is communicated with the main channel 14, and the second channel 12 and the third channel 13 are not communicated with the main channel 14; the clockwise rotation is continued for 30 degrees, the second channel 12 is communicated with the main channel 14, and the first channel 11, the second channel 12 and the main channel 14 are not communicated; the clockwise rotation is continued for 30 degrees, the third channel 13 is communicated with the main channel 14, and the first channel 11, the second channel 12 and the main channel 14 are not communicated; and the first channel 11, the second channel 12, the third channel 13 and the main channel 14 are not communicated with each other by clockwise rotating 30 degrees again. Therefore, the purposes of all-pass, all-no-pass or single-path pass and other paths do not pass are achieved.
In the third embodiment, a column type multifunctional tunnel valve, as shown in fig. 7, 8, 9 and 10, comprises a valve seat 1 and a valve core 2, wherein the valve core 2 is cylindrical, and the valve cavity of the valve seat 1 is cylindrical. The valve core 2 is connected with a handle 302.
The valve seat 1 is provided with four channels, a first channel 11, a second channel 12 and a third channel 13 are uniformly arranged along the vertical direction, the main channel 14 is arranged on the other side of the valve seat 1 relative to the second channel 12, one side of the valve core 2 is provided with a flow groove 301 for butting with the main channel 14, the other side is provided with four channels, the first channel 31 and the first channel 11 are at the same height, the second channel 32 and the second channel 12 are at the same height, the third channel 33 and the third channel 13 are at the same height, and orthographic projections of the first channel 31, the second channel 32 and the third channel 33 in the vertical direction are not overlapped, namely the first channel 31, the second channel 32 and the third channel 33 are staggered in the horizontal direction; the fourth passage 34 is a vertical waist-shaped groove, and the upper end of the fourth passage 34 is higher than the first passage 11, and the lower end is lower than the third passage 13; the first passage 31, the second passage 32, the third passage 33, and the fourth passage 34 all communicate with the flow groove 301.
When the valve core 2 is rotated to the right until the first passage 31 and the first passage 11 are butted, the first passage 11 and the main passage 14 are communicated, and the liquid can enter the first passage 31 from the first passage 11, then enter the flow groove 301 and then flow out from the main passage 14, as shown in fig. 7. Similarly, when the valve core 2 in fig. 7 is rotated to the right, the second passage 32 is butted with the second passage 12, or rotated to the left, the third passage 33 is butted with the third passage 13, or the fourth passage 34 is butted with all of the first passage 11, the second passage 12 and the third passage 13.
During production, marks can be arranged on the valve seat 1 corresponding to each passage, so that the passages can be accurately butted with the channels.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention. While the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. The utility model provides an automatic sampling system of storage tank with multi-functional tunnel valve, includes power pump, sample thief and a plurality of and treat the sampling link that the sampling tank is connected, its characterized in that: the multifunctional tunnel valve comprises a valve seat and a valve core, wherein the valve seat is internally provided with a valve cavity, the valve core is arranged in the valve cavity, and the valve core can rotate in the valve cavity; the valve seat is provided with a plurality of branch flow channels and a confluence flow channel, the valve core is provided with a plurality of passages and a circulating part, and one end of each passage is communicated with the circulating part; wherein:
each branch flow channel on the valve seat corresponds to the sampling connecting end one by one, and each sampling connecting end is connected with the corresponding branch flow channel on the valve seat;
any branch flow channel on the valve seat can be directly butted and communicated with one passage on the valve core; when any branch flow channel on the valve seat is in butt joint communication with the corresponding passage on the valve core, the confluence flow channel on the valve seat can also be communicated with the circulation part on the valve core;
all branch flow channels on the valve seat can be directly and simultaneously communicated with the communicating part on the valve core through the passage; when all branch flow channels on the valve seat are communicated with the circulating part on the valve core at the same time, the confluence flow channel on the valve seat can also be communicated with the circulating part on the valve core;
the converging flow channel of the valve seat is externally connected with two branches through a three-way joint, one branch is a sampling branch, a sampler is arranged on the sampling branch, the other branch is a replacement branch, the power pump is arranged on the replacement branch, and the converging flow channel of the valve seat can be connected with the to-be-sampled tank through a liquid path of the three-way joint and the power pump in sequence.
2. The automatic storage tank sampling system with the multifunctional tunnel valve according to claim 1, characterized in that: the sampler is a closed sampler and comprises a sampling bottle and a three-way valve group, wherein the sampling bottle is provided with an oil inlet joint and an exhaust joint;
the three-way valve group comprises an oil inlet valve and an exhaust valve which are three-way valves;
two inlets and one outlet of the oil inlet valve: the inlet of the oil inlet valve is connected with the outlet of the multifunctional tunnel valve, and the outlet of the oil inlet valve is connected with an oil inlet joint;
two outlet valves and one inlet valve: the air inlet of the exhaust valve is connected with an exhaust joint, the outlet of the exhaust valve is connected with an adsorption tank, and the outlet II of the exhaust valve is connected with the inlet II of the oil inlet valve.
3. The automatic storage tank sampling system with the multifunctional tunnel valve as claimed in claim 2, wherein: the three-way valve group is provided with a linkage device, when the linkage device is driven to a sampling position, the outlet of the oil inlet valve is communicated with the inlet of the oil inlet valve, and meanwhile, the inlet of the exhaust valve is communicated with the outlet of the exhaust valve; when the linkage device is driven to the vacant discharge position, the outlet of the oil inlet valve is communicated with the inlet II, and meanwhile, the inlet and the outlet of the exhaust valve are communicated.
4. The automatic storage tank sampling system with the multifunctional tunnel valve according to claim 1, characterized in that: the multifunctional tunnel valve is of a ball type structure, the valve cavity and the valve core of the valve seat are both spherical, and the valve core is of a hollow structure and is provided with an internal cavity; the circulating part of the valve core is the inner cavity of the valve core; each passage of the valve core radially penetrates through the periphery of the inner cavity of the valve core along the radial direction of the valve core;
when any branch flow channel on the valve seat is directly butted and communicated with the corresponding passage on the valve core, the confluence flow channel on the valve seat can also be directly communicated with the circulating part on the valve core through one of the rest passages on the valve core;
all branch flow channels on the valve seat can be directly communicated with the circulation part through different passages on the valve core in a one-to-one butt joint mode, and when all branch flow channels on the valve seat are communicated with corresponding passages on the valve core in a butt joint mode, the confluence flow channel on the valve seat can also be directly communicated with the circulation part on the valve core through one of the rest passages on the valve core.
5. The automatic storage tank sampling system with the multifunctional tunnel valve according to claim 1, characterized in that: the multifunctional tunnel valve is of a column type structure, and a valve cavity and a valve core of the valve seat are cylindrical; wherein:
the valve core has one flow part with flow groove on one side and the flow channels on the opposite side; the circulation groove can form a sealed circulation cavity with the cavity wall of the valve cavity;
one end of each branch flow channel on the valve seat, which is adjacent to the valve core passage, is arranged on one side of the valve seat in a row along the length direction of the valve seat, and the confluence flow channel of the valve seat is arranged on the other side of the valve seat and is directly communicated with the circulation cavity;
the passages on the valve core are divided into two types, wherein one type comprises a plurality of passages a, and the other type comprises a passage b; wherein:
each passage a is respectively arranged corresponding to each branch flow channel on the valve seat one by one, the adjacent end of each passage a and the corresponding branch flow channel on the valve seat are arranged at the same height, and the adjacent end of each passage a and the upper flow channel on the valve seat are in staggered projection in the vertical direction; each branch passage on the valve seat can be directly communicated with the circulating cavity through the corresponding passage a;
the passage b is in a kidney-shaped hole shape and is arranged along the length direction of the valve core, the uppermost part of the kidney-shaped hole end of the passage b is higher than the position of the passage a at the uppermost part, and the lowermost part of the kidney-shaped hole end of the passage b is lower than the position of the passage a at the lowermost part; each branch passage on the valve seat can communicate with the circulation chamber directly through the passage b at the same time.
6. The automatic sampling system of storage tank with multifunctional tunnel valve of claim 4 or 5, characterized in that: the multifunctional tunnel valve is a four-way valve, three branch flow channels on the valve seat are respectively a channel I, a channel II and a channel III, and only one confluence flow channel on the valve seat is a main channel; the sampling connecting ends are also three, namely a sampling connecting end I, a sampling connecting end II and a sampling connecting end III; the sampling connecting end is connected with the first connecting channel, the sampling connecting end is connected with the second connecting channel, and the sampling connecting end is connected with the third connecting channel.
7. The automatic storage tank sampling system with the multifunctional tunnel valve according to claim 6, wherein: when the multifunctional tunnel valve is a ball-type four-way valve, the passages formed in the valve core are arranged along the circumferential direction of the valve core, eight passages are formed in total, and the passages are a passage one, a passage two, a passage three, a passage four, a passage five, a passage six, a passage seven and a passage eight respectively;
each tributary passageway and conflux channel all are in the coplanar on the disk seat, wherein: the included angle between the first channel and the second channel is 105 degrees, the included angle between the second channel and the third channel is 90 degrees, and the included angle between the third channel and the total channel is 90 degrees;
the eight passages of the valve core and the four passages of the valve seat are all in the same plane, the included angle between the first passage and the second passage, the included angle between the second passage and the third passage, the included angle between the third passage and the fourth passage, and the included angle between the fifth passage and the sixth passage are all 30 degrees, the included angle between the fourth passage and the fifth passage, the included angle between the sixth passage and the seventh passage are 45 degrees, the included angle between the seventh passage and the eighth passage is 60 degrees, and the included angle between the eighth passage and the first passage is 90 degrees;
when the multifunctional tunnel valve is a column type four-way valve, a first channel, a second channel and a third channel on the valve seat are uniformly arranged on one side of the valve seat along the vertical direction, and the main channel is arranged on the other side of the valve seat; the valve core is provided with three passages a which are respectively a first passage, a second passage and a third passage, the valve core is provided with a passage b which is a fourth passage, the first passage and the first channel are at the same height, the second passage and the second channel are at the same height, and the third passage and the third channel are at the same height.
8. An automatic closed sampling method for a storage tank is characterized in that: the method comprises the following steps:
step one, an oil inlet joint and an exhaust joint of a sampling bottle are respectively connected with an oil outlet of an oil inlet valve and an air inlet of an exhaust valve;
step two, replacing the old oil in the sampling pipeline
Step 2.1, the multifunctional tunnel valve is moved to a position changing/mixed mining position, and the position changing/mixed mining position is in a full-through state of the multifunctional tunnel valve; at the moment, a confluence flow channel of the multifunctional tunnel valve is communicated with the power pump and is cut off from the oil inlet valve;
2.2, starting the power pump, sucking oil in the to-be-sampled tank into a liquid path of the power pump from the three sampling connecting ends, then introducing the oil into the to-be-sampled tank, performing pipeline replacement, stopping the power pump after the requirement of complete replacement of the old oil in the pipeline is met, controlling a working condition change-over valve, and cutting off a flow path between the multifunctional tunnel valve and the power pump;
step three, sampling
Point mining or mixed mining can be realized by controlling the multifunctional tunnel valve;
the point picking process comprises the following specific steps:
3.1.1, moving the multifunctional tunnel valve to a sampling point position corresponding to the oil product at the required sampling connecting end, then adjusting the working condition conversion valve to a sampling station, moving the linkage device of the sampler to the sampling position, allowing the oil product at the required sampling connecting end to flow into a sampling bottle through the multifunctional tunnel valve, the three-way joint and the oil inlet valve in sequence under the action of gravity, and discharging air in the sampling bottle to an adsorption tank through an exhaust valve;
3.1.2, after the flow valve between the multifunctional tunnel valve and the sampling connecting end displays that the oil sampling amount meets the requirement, closing the multifunctional tunnel valve, moving a linkage device of the sampler to an emptying position, communicating an exhaust port of the sampling bottle with an air inlet channel of an oil inlet valve through an air conveying channel of the emptying valve, emptying residual oil in a pipeline behind the oil inlet valve, and finishing point sampling of the sampling connecting end;
the concrete process of mixed mining is as follows:
3.2.1, adjusting the opening degree of a flow valve between the multifunctional tunnel valve and each sampling connecting end according to the proportion of oil products at each collecting position in mixed sampling;
3.2.2, moving the multifunctional tunnel valve to a position changing/mixed sampling position, then moving a linkage device of the sampler to the sampling position, wherein oil collected from each sampling connecting end flows into a sampling bottle through the multifunctional tunnel valve, the three-way joint and the oil inlet valve in sequence under the action of gravity, and air in the sampling bottle is discharged to the adsorption tank through the emptying valve;
3.2.3, after the flow valve between multi-functional tunnel valve and the sampling link shows that the oil sampling volume reaches the requirement, close multi-functional tunnel valve to move the aggregate unit of sample thief to the evacuation position, the gas transmission passageway of sampling bottle passes through the exhaust valve communicates with the inlet channel of inlet valve, empties the residual oil in the pipeline behind the inlet valve, accomplishes the mixed mining of each sampling site.
9. The automatic closed storage tank sampling method according to claim 8, characterized in that: the sampling time in step 2.2 lasts one minute, and the power pump is turned off after one minute.
10. The automatic closed storage tank sampling method according to claim 8, characterized in that: in steps 3.1.2, 3.2.3, the evacuation time lasted 0.5 minutes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810728964 | 2018-07-05 | ||
| CN2018107289646 | 2018-07-05 |
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| CN110686930A true CN110686930A (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811160536.4A Pending CN110686930A (en) | 2018-07-05 | 2018-09-30 | Automatic storage tank sampling system with multifunctional tunnel valve and sampling method |
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