CN109436851B - Sand cleaning device and method for airtight sand mixing tank - Google Patents
Sand cleaning device and method for airtight sand mixing tank Download PDFInfo
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- CN109436851B CN109436851B CN201811571814.5A CN201811571814A CN109436851B CN 109436851 B CN109436851 B CN 109436851B CN 201811571814 A CN201811571814 A CN 201811571814A CN 109436851 B CN109436851 B CN 109436851B
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- 239000004576 sand Substances 0.000 title claims abstract description 343
- 238000004140 cleaning Methods 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000001502 supplementing effect Effects 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 239000000919 ceramic Substances 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 32
- 229910002092 carbon dioxide Inorganic materials 0.000 description 16
- 239000001569 carbon dioxide Substances 0.000 description 16
- 230000008569 process Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G67/00—Loading or unloading vehicles
- B65G67/02—Loading or unloading land vehicles
- B65G67/04—Loading land vehicles
- B65G67/06—Feeding articles or materials from bunkers or tunnels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/06—Gas pressure systems operating without fluidisation of the materials
- B65G53/10—Gas pressure systems operating without fluidisation of the materials with pneumatic injection of the materials by the propelling gas
- B65G53/12—Gas pressure systems operating without fluidisation of the materials with pneumatic injection of the materials by the propelling gas the gas flow acting directly on the materials in a reservoir
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
The invention discloses a sand cleaning device and method of a closed sand mixing tank, wherein the device at least comprises an air compressor, the closed sand mixing tank, a pressure supplementing pipeline and a sand cleaning pipeline, an air outlet of the air compressor is connected with an air inlet connected with the pressure supplementing pipeline and the sand cleaning pipeline in parallel, a sand outlet connected with the sand cleaning pipeline and the pressure supplementing pipeline in parallel is detachably connected with a sand inlet of a sand tank truck for transportation, the closed sand mixing tank is fixedly connected with the pressure supplementing pipeline, and the bottom of the closed sand mixing tank is provided with a sand conveying mechanism. The air compressor is used for providing sand cleaning power, ceramsite sand in the airtight sand mixing tank can be automatically cleaned, the airtight sand mixing tank is not only a sand cleaning object but also a sand cleaning tool, under the condition that people do not enter the tank, an air-driven sand cleaning method is adopted, speed-adjustable automatic sand cleaning is realized through the sand conveying mechanism, the flow connection is simple, the sand cleaning speed is high, the sand cleaning effect is good, the labor intensity is greatly reduced, the ceramsite sand is directly fed into the sand tank truck, and the ceramsite sand recycling rate is improved.
Description
Technical Field
The invention belongs to the technical field of oil and gas field development, and particularly relates to a sand cleaning device and method of a closed sand mixing tank.
Background
The carbon dioxide dry sand fracturing technology belongs to an emerging technology in China, and a carbon dioxide closed sand mixing tank is used as core equipment of the carbon dioxide closed sand mixing tank and is in the process of continuous optimization and improvement. In the carbon dioxide dry sand adding fracturing construction process, the ceramsite sand is added into a carbon dioxide closed sand mixing tank body according to design requirements before construction, if construction is blocked, the ceramsite sand in the carbon dioxide closed sand mixing tank is remained due to stratum or various reasons in the process, and the remained ceramsite sand of the tank body must be cleaned after the construction is completed.
At present, manual sand removal is adopted in a sand removal mode, namely, a manhole flange at the end part of a closed sand mixing device, particularly a carbon dioxide closed sand mixing tank is opened, a person enters the tank to remove sand by using a spade or a barrel, the labor intensity of manual sand removal is high, the efficiency is low, and the safety risk exists in the tank for sand removal by the person.
Disclosure of Invention
The invention aims to provide a sand cleaning device and method for a closed sand mixing tank, which are used for cleaning ceramsite sand in the closed sand mixing tank, in particular to a carbon dioxide closed sand mixing tank, so as to solve the problems of high labor intensity, low sand cleaning efficiency, poor safety and non-compliance with human engineering of manual sand cleaning.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a sand cleaning device of airtight sand mixing jar which characterized in that: the sand tank comprises an air compressor, a closed sand mixing tank, a pressure compensating pipeline and a sand cleaning pipeline, wherein an air outlet of the air compressor is connected with an air inlet connected with the pressure compensating pipeline and the sand cleaning pipeline in parallel, a sand outlet connected with the sand cleaning pipeline and the pressure compensating pipeline in parallel is detachably connected with a sand inlet of a sand tank truck for transportation, and the closed sand mixing tank is fixedly connected with the pressure compensating pipeline, and a sand conveying mechanism is arranged at the bottom of the closed sand mixing tank.
The air inlets of the pressure supplementing pipeline and the sand cleaning pipeline which are connected in parallel are detachably connected with the air compressor through a third quick connector; the sand outlet of the pressure supplementing pipeline and the sand cleaning pipeline which are connected in parallel is detachably connected with a hose through a second quick connector, and the other end of the hose is detachably connected with the sand inlet of the sand tank car through a first quick connector.
The hose is a wear resistant transparent tube.
And a safety valve is arranged on the air compressor.
The air inlet of the airtight sand mixing tank is provided with a flowmeter and a pressure compensating valve, and the sand outlet of the airtight sand mixing tank is connected with a sand outlet valve.
The pressure supplementing valve and the sand outlet valve are opening valves, and the opening of the pressure supplementing valve and the opening of the sand outlet valve are adjustable.
And the sand cleaning pipeline is also connected with a pressure sensor and a check valve.
The sand conveying mechanism is a sand conveying screw, the sand conveying screw is arranged along the length direction of the airtight sand mixing tank, and one end of the sand conveying screw penetrates through one side wall of the airtight sand mixing tank to extend to the outer side of the airtight sand mixing tank and is connected with an electric control cabinet.
The sand conveying screw comprises a screw shaft and a motor, one end of the screw shaft is provided with a plurality of forward blades, the other end of the screw shaft is provided with a plurality of reverse blades, and an optical axis between the forward blades and the reverse blades is positioned right above a sand outlet of the airtight sand mixing tank; the motor is electrically connected with an electric control cabinet outside the airtight sand mixing tank.
The sand cleaning method of the airtight sand mixing tank comprises the following specific steps:
step one, starting: starting an air compressor, cleaning a sand cleaning pipeline, forming a passage between the sand cleaning pipeline and a sand tank truck, and ensuring that a pressure sensor displays stable numerical value without abnormal fluctuation;
step two, opening a valve: fully opening a sand outlet valve, opening a pressure supplementing valve to 25%, supplementing pressure in a tank of the airtight sand mixing device, and forming a positive pressure condition in the airtight sand mixing device;
starting a sand conveying mechanism: starting a sand conveying screw, adjusting the rotating speed to 10r/min, starting sand removal, observing the lifting condition of the ceramic sand in the hose, observing whether the display values of the pressure sensor and the flowmeter are stable, if the display value fluctuation ratio is large, indicating that the sand flow in the sand cleaning pipeline is uneven, blocking easily occurs, and reducing the rotating speed of the sand conveying screw until the display values of the pressure sensor and the flowmeter are stable; after the numerical value is stable, gradually increasing the rotating speed of the sand conveying screw to 45r/min to form stable sand cleaning flow rate;
stopping the sand conveying mechanism: observing the hose, if no ceramsite sand passes, indicating that the ceramsite sand in the closed sand mixing device is cleaned, stopping the sand conveying screw, and then closing the sand outlet valve;
step five, shutting down: and closing the air compressor, and completing sand removal.
The beneficial effects of the invention are as follows:
(1) The invention can clean the ceramsite sand in the airtight sand mixing tank, in particular to the carbon dioxide airtight sand mixing tank, adopts an automatic sand cleaning mode, does not enter the tank, reduces labor intensity, improves sand cleaning efficiency and meets the requirements of human engineering.
(2) The sand removal power is provided through the air compressor, the sand removal pipeline is used as a sand removal channel, the pressure compensation valve of the carbon dioxide closed sand mixing tank is utilized for adjustment, and under the combined action of the sand conveying screw and air driving, the ceramic sand in the carbon dioxide closed sand mixing tank is emptied, and the carbon dioxide closed sand mixing tank is not only a sand removal object but also a sand removal tool.
(3) The pressure supplementing pipeline is connected with the sand cleaning pipeline in parallel, the flowmeter and the pressure sensor are matched, the pressure supplementing effect of the pressure supplementing valve is utilized to supplement pressure to the carbon dioxide airtight sand mixing tank, positive pressure is formed in the carbon dioxide airtight sand mixing tank, the ceramsite sand in the tank plays a role in air driving, and the blocking phenomenon of the ceramsite sand in the carbon dioxide airtight sand mixing tank or the sand cleaning pipeline in the sand cleaning process can be effectively prevented by the split-flow sand cleaning process, so that the sand cleaning efficiency is improved.
Drawings
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, in which:
FIG. 1 is an overall block diagram of the present invention;
fig. 2 is a partial structural view of the present invention.
In the figure: 1. an air compressor; 2. a safety valve; 3. a flow meter; 4. a pressure compensating valve; 5. reversing blades; 6. a forward blade; 7. sealing the sand mixing tank; 8. sand conveying spiral; 9. a sand sliding plate; 10. a hose; 11. a first quick connector; 12. A sand tank truck; 13. a second quick connector; 14. a sand outlet valve; 15. a check valve; 16. a pressure sensor; 17. a manhole; 18. a third quick joint; 19. pressure compensating pipeline; 20. sand cleaning pipeline.
Detailed Description
In order to further describe the technical means and effects adopted for achieving the preset aim of the invention, the following detailed description refers to the specific implementation, structure, characteristics and effects according to the application of the invention with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
Example 1
The utility model provides a sand cleaning device of airtight sand mixing jar which characterized in that: the sand tank comprises an air compressor 1, a closed sand mixing tank 7, a pressure compensating pipeline 19 and a sand cleaning pipeline 20, wherein an air outlet of the air compressor 1 is connected with an air inlet connected with the pressure compensating pipeline 19 and the sand cleaning pipeline 20 in parallel, a sand outlet connected with the sand cleaning pipeline 20 and the pressure compensating pipeline 19 in parallel is detachably connected with a sand inlet of a sand tank truck 12 for transportation, and the closed sand mixing tank 7 is fixedly connected with the pressure compensating pipeline 19, and a sand conveying mechanism is arranged at the bottom of the closed sand mixing tank.
According to the invention, an automatic sand removal mode is adopted, and sand removal operation is performed without entering the sealed sand mixing tank 7 from the manhole 17, so that the requirements of ergonomics are met, the labor intensity is reduced, and the sand removal efficiency is improved. When the sand cleaning device is used, the air outlet of the air compressor 1 is connected with two pipelines in parallel, one pipeline is a pressure supplementing pipeline 19, the other pipeline is a sand cleaning pipeline 20, the pressure supplementing pipeline 19 is also connected with a sealed sand mixing tank 7, sand cleaning power is provided by the air compressor 1, the sand cleaning pipeline 20 is used as a sand cleaning channel, the pressure supplementing pipeline 19 is utilized to carry out in-tank pressure supplementing on the sealed sand mixing tank 7, positive pressure conditions are formed in the sealed sand mixing tank 7, the ceramsite sand in the sealed sand mixing tank 7 plays a role of air driving, and the ceramsite sand in the sealed sand mixing tank 7 is cleaned under the combined action of a sand conveying mechanism and air driving, and the sealed sand mixing tank 7 is a sand cleaning object and a sand cleaning tool. The split-flow sand cleaning device can effectively prevent the blocking phenomenon of ceramsite sand in the sealed sand mixing tank 7 or the sand cleaning pipeline 20 in the sand cleaning process, and improves the sand cleaning efficiency.
Example 2
As shown in fig. 1, the device is an improvement on the basis of the embodiment 1, wherein the air inlets of the pressure supplementing pipeline 19 and the sand cleaning pipeline 20 which are connected in parallel are detachably connected with the air compressor 1 through a third quick connector 18; the sand outlet of the pressure supplementing pipeline 19 and the sand cleaning pipeline 20 which are connected in parallel is detachably connected with a hose 10 through a quick joint II 13, and the other end of the hose 10 is detachably connected with the sand inlet of the sand tank truck 12 through a quick joint I11. The quick connector I11, the quick connector II 13 and the quick connector III 18 are used, so that the connection between pipelines is more flexible and convenient, time and labor are saved, the environment is protected, the cost is saved, the equipment is integrated into zero, and the transportation is convenient.
The hose 10 is a wear resistant transparent tube. The wear-resistant transparent pipe can be bent for a certain angle, is convenient for conveying the ceramic sand, and has no dead angle and no residue. The hose 10 adopts transparent pipe, can conveniently observe the lift conveying condition of intraductal material.
The air compressor 1 is provided with a safety valve 2.
When the invention is used, the airtight sand mixing tank 7, in particular the carbon dioxide airtight sand mixing tank, is used as a sand cleaning object and a sand cleaning tool, can effectively prevent the blocking phenomenon of the ceramic sand in the airtight sand mixing tank 7 or the sand cleaning pipeline 20 in the sand cleaning process, automatically controls the cleaning of the ceramsite sand in the airtight sand mixing tank 7, does not enter the tank, reduces the labor intensity and improves the sand cleaning efficiency.
Example 3
As shown in fig. 1, the device is an improvement on the basis of embodiment 1 or embodiment 2, a flow meter 3 and a pressure compensating valve 4 are arranged at the air inlet of the closed sand mixing tank 7, and a sand outlet valve 14 is connected at the sand outlet of the closed sand mixing tank 7. The flowmeter 3 and the pressure compensating valve 4 are electrically connected with an external power supply, and the positions of the flowmeter 3 and the pressure compensating valve 4 on the pressure compensating pipeline 19 are adjustable, wherein the flowmeter 3 and the pressure compensating valve 4 are arranged in sequence along the gas flow direction as the optimal.
The pressure compensating valve 4 and the sand outlet valve 14 are opening valves, and the opening degrees of the pressure compensating valve 4 and the sand outlet valve 14 are adjustable. The opening of the pressure compensating valve 4 and the sand outlet valve 14 can be adjusted so as to be convenient for adjusting the sand flow speed of the ceramic sand in cooperation with the display values of the flowmeter 3 and the pressure sensor 16, and avoid the occurrence of blocking phenomenon.
The sand removal line 20 is also connected with a pressure sensor 16 and a check valve 15. The pressure sensor 16 and the check valve 15 are electrically connected to an external power source. The pressure sensor 16 can display the pressure on the pressure compensating line 19 and the sand cleaning line 20 at the same time, and the positions of the pressure sensor 16 and the check valve 15 on the sand cleaning line 20 are adjustable, wherein the pressure sensor 16 and the check valve 15 are arranged in sequence along the gas flow direction optimally.
In use, the flow meter 3 and the pressure sensor 16 display values which, if stable, indicate that the sand flow in the sand removal pipeline 20 is uniform; if the flow meter 3 and the pressure sensor 16 show larger numerical fluctuation, the sand flow in the sand removal pipeline 20 is uneven, and blockage is very easy to occur, and the rotating speed of the sand conveying mechanism is reduced until the flow meter 3 and the pressure sensor 16 show stable numerical fluctuation, and after the numerical fluctuation is shown, the stable rotating speed of the sand conveying mechanism is gradually increased, so that a stable sand removal flow is formed.
Example 4
As shown in fig. 1 and 2, the sand conveying mechanism is an improved sand conveying spiral 8 on the basis of embodiment 1, the sand conveying spiral 8 is arranged along the length direction of the airtight sand mixing tank 7, and one end of the sand conveying spiral 8 penetrates through one side wall of the airtight sand mixing tank 7 to extend to the outer side of the airtight sand mixing tank 7 and is connected with an electric control cabinet.
The sand conveying screw 8 comprises a screw shaft and a motor, one end of the screw shaft is provided with a plurality of forward blades 6, the other end of the screw shaft is provided with a plurality of reverse blades 5, and an optical axis between the forward blades 6 and the reverse blades 5 is positioned right above a sand outlet of the airtight sand mixing tank 7; the motor is electrically connected with an electric control cabinet outside the airtight sand mixing tank 7.
The sand conveying screw 8 is driven by a motor, the rotation of the screw shaft enables the materials in the airtight sand mixing tank 7 to be conveyed to the sand outlet of the airtight sand mixing tank 7, and under the condition of low rotation speed, the high torque is output, so that the stepless speed regulating function can be realized.
A spare manhole 17 is formed on one side wall of the width direction of the airtight sand mixing tank 7, and the manhole 17 is sealed through flange connection. A plurality of reverse blades 5 are arranged on one side, close to the manhole 17, of the screw shaft, a plurality of forward blades 6 are arranged on one side, far away from the manhole 17, of the screw shaft, sand passing gaps are reserved on the optical axis of the joint of the forward blades 6 and the reverse blades 5, and materials on two sides of the airtight sand mixing tank 7 are continuously transported to the vicinity of the sand passing gaps on the optical axis when the forward blades 6 and the reverse blades 5 work, and then flow out from a sand outlet of the airtight sand mixing tank 7.
A group of sand sliding plates 9 are welded on the side wall of the bottom of the airtight sand mixing tank 7 along the length direction, the sand sliding plates 9 are positioned below the sand conveying spiral 8, the included angle between the sand sliding plates 9 and the horizontal direction is 30-60 degrees, a sand passing channel is reserved between the two sand sliding plates 9, and the sand passing channel is positioned right above a sand outlet of the airtight sand mixing tank 7. The included angle between the sand sliding plate 9 and the horizontal direction is 30-60 degrees, and the inclined sand sliding plate 9 is beneficial to the sand conveying spiral 8 to convey the ceramic sand to the sand outlet of the airtight sand mixing tank 7, so that the ceramic sand is easier to output from the sand outlet.
Example 5
As shown in fig. 1, the method for cleaning sand by adopting the invention comprises the following specific steps:
step one, starting: starting the air compressor 1, cleaning the sand cleaning pipeline 20, forming a passage between the sand cleaning pipeline 20 and the sand tank truck 12, and ensuring that the pressure sensor 16 displays stable numerical values without abnormal fluctuation;
step two, opening a valve: fully opening the sand outlet valve 14, opening the pressure compensating valve 4 to 25%, compensating pressure in the tank of the closed sand mixing device 7, and forming a positive pressure condition in the closed sand mixing device 7;
starting a sand conveying mechanism: starting the sand conveying screw 8, adjusting the rotating speed to 10r/min, starting sand cleaning, observing the lifting condition of the ceramic sand in the hose 10, observing whether the values displayed by the pressure sensor 16 and the flowmeter 3 are stable, if the displayed values fluctuate more, indicating that the sand flow in the sand cleaning pipeline 20 is uneven, blocking is easy to occur, and reducing the rotating speed of the sand conveying screw 8 until the values displayed by the pressure sensor 16 and the flowmeter 3 are stable; after the numerical value is stable, the rotating speed of the sand conveying spiral 8 is gradually increased to 45r/min, so that a stable sand cleaning flow rate is formed;
stopping the sand conveying mechanism: observing the hose 10, if no ceramsite sand passes, indicating that the ceramsite sand in the closed sand mixing device 7 is cleaned, stopping the sand conveying screw 8, and then closing the sand outlet valve 14;
step five, shutting down: and closing the air compressor 1, and completing sand removal.
What needs to be explained here is: under the condition of no conflict, the technical features related to the examples can be combined with each other according to actual situations by a person skilled in the art so as to achieve corresponding technical effects, and specific details of the combination situations are not described in detail herein.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention in any way, but any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (2)
1. The utility model provides a sand cleaning device of airtight sand mixing jar which characterized in that: the sand control device at least comprises an air compressor (1), a closed sand mixing tank (7), a pressure compensating pipeline (19) and a sand cleaning pipeline (20), wherein an air outlet of the air compressor (1) is connected with an air inlet which is connected with the pressure compensating pipeline (19) and the sand cleaning pipeline (20) in parallel, a sand outlet which is connected with the sand cleaning pipeline (20) and the pressure compensating pipeline (19) in parallel is detachably connected with a sand inlet of a sand tank truck (12) for transportation, the closed sand mixing tank (7) is fixedly connected with the pressure compensating pipeline (19), and the bottom of the closed sand mixing tank is provided with a sand conveying mechanism;
the air inlets connected in parallel with the pressure supplementing pipeline (19) and the sand cleaning pipeline (20) are detachably connected with the air compressor (1) through a third quick connector (18); the sand outlet of the pressure supplementing pipeline (19) and the sand cleaning pipeline (20) which are connected in parallel is detachably connected with a hose (10) through a quick joint II (13), and the other end of the hose (10) is detachably connected with the sand inlet of the sand tank truck (12) through a quick joint I (11);
the hose (10) is a wear resistant transparent tube;
the air compressor (1) is provided with a safety valve (2);
a flow meter (3) and a pressure compensating valve (4) are arranged at the air inlet of the airtight sand mixing tank (7), and a sand outlet valve (14) is connected at the sand outlet of the airtight sand mixing tank (7);
the pressure compensating valve (4) and the sand outlet valve (14) are opening valves, and the openings of the pressure compensating valve (4) and the sand outlet valve (14) are adjustable;
the sand cleaning pipeline (20) is also connected with a pressure sensor (16) and a check valve (15);
the sand conveying mechanism is a sand conveying spiral (8), the sand conveying spiral (8) is arranged along the length direction of the airtight sand mixing tank (7), and one end of the sand conveying spiral (8) penetrates through one side wall of the airtight sand mixing tank (7) to extend to the outer side of the airtight sand mixing tank and is connected with an electric control cabinet;
the sand conveying screw (8) comprises a screw shaft and a motor, one end of the screw shaft is provided with a plurality of forward blades (6), the other end of the screw shaft is provided with a plurality of reverse blades (5), and an optical axis between the forward blades (6) and the reverse blades (5) is positioned right above a sand outlet of the airtight sand mixing tank (7); the motor is electrically connected with an electric control cabinet outside the airtight sand mixing tank (7).
2. A sand cleaning method of a closed sand mixing tank is characterized in that: the method comprises the following specific steps:
step one, starting: starting an air compressor, cleaning a sand cleaning pipeline, forming a passage between the sand cleaning pipeline and a sand tank truck, and ensuring that a pressure sensor displays stable numerical value without abnormal fluctuation;
step two, opening a valve: fully opening a sand outlet valve, opening a pressure supplementing valve to 25%, supplementing pressure in a tank of the airtight sand mixing device, and forming a positive pressure condition in the airtight sand mixing device;
starting a sand conveying mechanism: starting a sand conveying screw, adjusting the rotating speed to 10r/min, starting sand removal, observing the lifting condition of the ceramic sand in the hose, observing whether the display values of the pressure sensor and the flowmeter are stable, if the display value fluctuation ratio is large, indicating that the sand flow in the sand cleaning pipeline is uneven, blocking easily occurs, and reducing the rotating speed of the sand conveying screw until the display values of the pressure sensor and the flowmeter are stable; after the numerical value is stable, gradually increasing the rotating speed of the sand conveying screw to 45r/min to form stable sand cleaning flow rate;
stopping the sand conveying mechanism: observing the hose, if no ceramsite sand passes, indicating that the ceramsite sand in the closed sand mixing device is cleaned, stopping the sand conveying screw, and then closing the sand outlet valve;
step five, shutting down: and closing the air compressor, and completing sand removal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811571814.5A CN109436851B (en) | 2018-12-21 | 2018-12-21 | Sand cleaning device and method for airtight sand mixing tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811571814.5A CN109436851B (en) | 2018-12-21 | 2018-12-21 | Sand cleaning device and method for airtight sand mixing tank |
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| Publication Number | Publication Date |
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| CN109436851A CN109436851A (en) | 2019-03-08 |
| CN109436851B true CN109436851B (en) | 2023-10-17 |
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| CN201811571814.5A Active CN109436851B (en) | 2018-12-21 | 2018-12-21 | Sand cleaning device and method for airtight sand mixing tank |
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| CN110685660B (en) * | 2019-11-01 | 2024-04-16 | 西南石油大学 | Device and method for realizing accurate control of concentration of sand-carrying fluid in proppant conveying experiment |
| CN111731869B (en) * | 2020-06-19 | 2021-11-19 | 江苏博德维环境技术有限公司 | Feeding and discharging device used in air film building |
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| CN209427768U (en) * | 2018-12-21 | 2019-09-24 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of fettling installation of closed mixing sand tank |
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| CN207413331U (en) * | 2017-09-20 | 2018-05-29 | 中国石油集团西部钻探工程有限公司 | Pressing crack construction fiber mixes device |
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Inventor after: Yang Yanzeng Inventor after: Nie Jun Inventor after: Zhang Dongzhe Inventor after: Ye Wenyong Inventor after: Wei Xiaofang Inventor after: Zhang Yue Inventor after: Song Xiaomei Inventor after: Liu Jie Inventor after: Cao Yanqin Inventor before: Yang Yanzeng Inventor before: Nie Jun Inventor before: Zhang Dongzhe Inventor before: Ye Wenyong Inventor before: Wei Xiaofang Inventor before: Zhang Yue Inventor before: Song Xiaomei Inventor before: Liu Jie Inventor before: Cao Yanqin |
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Effective date of registration: 20201202 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Applicant after: CHINA NATIONAL PETROLEUM Corp. Applicant after: CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING Co. Address before: 710018 Shaanxi city of Xi'an province Weiyang District four road Fengcheng Changqing Technology Building Applicant before: CNPC CHUANQING DRILLING ENGINEERING COMPANY LIMITED ENGINEERING TECHNOLOGY Research Institute |
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