CN110652765B - Self-cleaning filtering mechanism of wireless inclinometer while drilling and wireless inclinometer while drilling - Google Patents
Self-cleaning filtering mechanism of wireless inclinometer while drilling and wireless inclinometer while drilling Download PDFInfo
- Publication number
- CN110652765B CN110652765B CN201911070986.9A CN201911070986A CN110652765B CN 110652765 B CN110652765 B CN 110652765B CN 201911070986 A CN201911070986 A CN 201911070986A CN 110652765 B CN110652765 B CN 110652765B
- Authority
- CN
- China
- Prior art keywords
- filter
- connecting shaft
- strip
- wireless inclinometer
- filter cartridge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000001914 filtration Methods 0.000 title claims abstract description 19
- 238000004140 cleaning Methods 0.000 title claims abstract description 13
- 238000005553 drilling Methods 0.000 title abstract description 39
- 239000012530 fluid Substances 0.000 abstract description 20
- 239000012535 impurity Substances 0.000 abstract description 14
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000003628 erosive effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geophysics (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Remote Sensing (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a self-cleaning filtering mechanism of a wireless inclinometer while drilling, which comprises a supporting seat, a filter cartridge and a connecting shaft, wherein the supporting seat is provided with a central through hole, a filter cavity is arranged in the filter cartridge, the top of the filter cartridge is sealed, and the bottom of the filter cartridge is connected with the supporting seat; the connecting shaft penetrates through the supporting seat and extends to the top of the filter cavity of the filter cartridge, and the central through hole and the filter cavity are in clearance fit with the connecting shaft; the top of the filter cartridge is provided with an axial strip-shaped filter groove, a flow passage axially extending to the lower end of the connecting shaft is arranged in the connecting shaft, and the flow passage is communicated with the filter cavity; the outer wall of the connecting shaft is provided with blades which are positioned in the strip-shaped filter grooves and are in clearance fit with the strip-shaped filter grooves. The invention can clean the strip-shaped filter tank, prevent impurities in drilling fluid from blocking the strip-shaped filter tank, and improve the use reliability of the wireless inclinometer filtering mechanism.
Description
Technical Field
The invention relates to the field of petroleum drilling equipment, in particular to a self-cleaning filtering mechanism of a wireless inclinometer while drilling and the wireless inclinometer while drilling.
Background
Currently, wireless inclinometers have been commonly used in the petroleum drilling and drilling industries. The reliability of the filter screen of the wireless inclinometer, which is used as a component for filtering impurities of drilling fluid flowing into the pulse generator of the wireless inclinometer, has become a concern of oilfield users. The general wireless inclinometer filter screen adopts fluting, trompil mode filtration impurity in the drilling fluid, does not have the clean function of initiative, in use, impurity in the drilling fluid can slowly block up filter screen body gap, especially when impurity content in the drilling fluid is high, the filter screen is blocked up very fast to make wireless inclinometer unable normal work along with boring.
Disclosure of Invention
The invention aims to solve the technical problem of providing a self-cleaning filtering mechanism of a wireless inclinometer and the wireless inclinometer, which can prevent the filtering mechanism from being blocked.
The technical scheme adopted for solving the technical problems is as follows: the self-cleaning filtering mechanism of the wireless inclinometer comprises a supporting seat, a filter cartridge and a connecting shaft, wherein the supporting seat is provided with a central through hole, a filtering cavity is arranged in the filter cartridge, the top of the filter cartridge is sealed, and the bottom of the filter cartridge is connected with the supporting seat; the connecting shaft penetrates through the supporting seat and extends to the top of the filter cavity of the filter cartridge, and the central through hole and the filter cavity are in clearance fit with the connecting shaft; the top of the filter cartridge is provided with an axial strip-shaped filter groove, a flow passage axially extending to the lower end of the connecting shaft is arranged in the connecting shaft, and the flow passage is communicated with the filter cavity; the outer wall of the connecting shaft is provided with blades which are positioned in the strip-shaped filter grooves and are in clearance fit with the strip-shaped filter grooves.
Further, the strip-shaped filter tanks are multiple, the outer wall of the connecting shaft is provided with a plurality of blades, and each blade is positioned in one strip-shaped filter tank.
Further, the flow passage penetrates through the connecting shaft, so that the upper port of the flow passage is connected with the filter cavity.
Further, the side wall of the connecting shaft is provided with a drainage hole which radially communicates the flow passage with the filter cavity.
Further, the side wall of the filter cartridge is provided with a plurality of radial diversion holes.
Further, the blade sets up the outer wall at the locating sleeve, and the connecting axle is the step shaft, the one end of locating sleeve is laminated with the step face of connecting axle, and the other end passes through jump ring chucking.
Further, the outer wall of the filter cartridge is provided with a loading and unloading groove.
Further, one end of the upper end face of the blade, which is far away from the connecting shaft, is provided with an upper inclined plane, one end of the lower end face of the blade, which is far away from the connecting shaft, is provided with a lower inclined plane, and the upper inclined plane and the lower inclined plane both form an angle of 40-60 degrees with the axial direction of the filter cartridge; the radial length of the upper inclined plane and the lower inclined plane is larger than the thickness of the strip-shaped filter tank.
Further, the filter cavity of the filter cartridge is a stepped hole, the upper diameter of the filter cavity is smaller than the lower diameter of the filter cavity, and the upper diameter of the filter cavity is larger than the distance from the outer edge of the blade to the central line of the filter cartridge.
The wireless inclinometer with the self-cleaning filtering mechanism comprises a body, wherein the upper end of the body is provided with a supporting disc, a center rod is arranged inside the supporting disc, the supporting seat is connected with the supporting disc, and the connecting shaft is connected with the center rod.
Compared with the prior art, the invention has the beneficial effects that: when the self-cleaning filter mechanism is used, the connecting shaft is connected with the central rod of the wireless inclinometer while drilling, the central rod of the wireless inclinometer while drilling can drive the connecting shaft to reciprocate along the axial direction, so that the blades on the connecting shaft reciprocate along the axial direction, the blades can clean impurities in the strip-shaped filter grooves in the moving process, the strip-shaped filter grooves are prevented from being blocked by the impurities in drilling fluid, and the use reliability of the filter mechanism of the wireless inclinometer while drilling is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of a wireless inclinometer of the present invention;
FIG. 2 is a schematic view of the exterior of the self-cleaning filter mechanism of the present invention;
FIG. 3 is a schematic top view of a blade;
FIG. 4 is a schematic view of the shape of a blade;
FIG. 5 is an enlarged schematic view of portion A of FIG. 1;
Reference numerals: 1-a filter cartridge; 11-a strip-shaped filter tank; 12-loading and unloading groove; 13-a deflector hole; 2-a supporting seat; 3-a connecting shaft; 31-flow channel; 32-drainage holes; 41-leaf; 42-positioning sleeve; 43-upper incline; 44-lower incline; 5-clamping springs; 100-body; 110-a support plate; 120—a central rod; beta-upper and lower inclined planes and the axial angle of the filter cartridge; t1, the thickness of the strip-shaped filter tank; t 2-radial length of the upper and lower ramps; t 3-the outer diameter of the blade; t 4-the upper outer diameter of the filter chamber; t 5-the lower inner diameter of the filter chamber; t6, length of the strip-shaped filter tank; t7—thickness of the blade; t 8-width of the strip filter cell.
Detailed Description
The invention will be further described with reference to the drawings and examples.
The self-cleaning filtering mechanism of the wireless inclinometer comprises a supporting seat 2, a filter cartridge 1 and a connecting shaft 3, wherein the supporting seat 2 is provided with a central through hole, a filter cavity is arranged in the filter cartridge 1, the top of the filter cartridge 1 is sealed, and the bottom of the filter cartridge is connected with the supporting seat 2; the connecting shaft 3 penetrates through the supporting seat 2 and extends to the top of the filter cavity of the filter cartridge 1, and the central through hole and the filter cavity are in clearance fit with the connecting shaft 3; the top of the filter cartridge 1 is provided with an axial strip-shaped filter groove 11, a flow channel 31 extending to the lower end of the connecting shaft 3 in the axial direction is arranged in the connecting shaft 3, and the flow channel 31 is communicated with the filter cavity; the outer wall of the connecting shaft 3 is provided with a blade 41, and the blade 41 is positioned in the strip-shaped filter tank 11 and is in clearance fit with the strip-shaped filter tank 11, so that the blade 41 can move in the strip-shaped filter tank 11, thereby scraping impurities remained in the strip-shaped filter tank 11.
The supporting seat 2 is used for installing the cartridge filter 1 on the wireless inclinometer while drilling, and the supporting seat 2 can be integrally formed, welded or threaded with the cartridge filter 1. The filter cartridge 1 is used for filtering drilling fluid, and prevents impurities in the drilling fluid from entering the wireless inclinometer while drilling. In order to realize the filtering function, the top of cartridge filter 1 has set up axial bar filter 11, and drilling fluid accessible bar filter 11 gets into the filter chamber, has set up connecting axle 3 for with the drilling fluid water conservancy diversion to in the wireless inclinometer while drilling, the runner 31 and the filter chamber intercommunication of connecting axle 3, and the drilling fluid in the filter chamber can flow along runner 31 to in the wireless inclinometer while drilling. In addition, the connecting shaft 3 can be connected with the central rod 120 of the wireless inclinometer while drilling, and along with the reciprocating motion of the central rod 120, the connecting shaft 3 drives the blades 41 to reciprocate, and the blades 41 can scrape off impurities staying in the strip-shaped filter tank 11, so that the strip-shaped filter tank 11 is prevented from being blocked due to continuous accumulation of the impurities.
The number of the strip-shaped filter grooves 11 may be 1, in order to improve the filtering efficiency, the number of the strip-shaped filter grooves 11 may be 2, 3,6, etc., preferably 4, and are uniformly distributed on the side wall of the filter cartridge 1, and similarly, the outer wall of the connecting shaft 3 is provided with a plurality of blades 41, and the number of the blades 41 is consistent with the number of the strip-shaped filter grooves 11, so that each blade 41 is located in one strip-shaped filter groove 11.
The flow channel 31 may be a blind hole in the connecting shaft 3, and the orifice is located at the lower end of the connecting shaft 3, and is communicated with the filter cavity through a connecting hole formed on the side wall of the connecting shaft 3, as a preferred embodiment: the flow channel 31 penetrates through the connecting shaft 3, so that the upper port of the flow channel 31 is connected with the filter cavity. In addition, in order to improve the efficiency of drilling fluid entering the flow channel 31, the side wall of the connecting shaft 3 is provided with drainage holes 32 which radially communicate the flow channel 31 with the filter cavity, and three drainage holes 32 are preferably adopted, so that erosion of the drilling fluid flowing into the filter cartridge 1 to the inner wall of the filter cartridge 1 and the connecting shaft 3 can be reduced.
In order to increase the flow area of the drilling fluid entering the filter cavity, the side wall of the filter cartridge 1 is provided with a plurality of radial diversion holes 13. The diversion holes 13 are communicated with the filter cavity and the external space, and the drilling fluid can enter the filter cavity through the diversion holes 13, so that the channel area of the drilling fluid entering the filter cavity is increased, and the erosion of the drilling fluid to the strip-shaped filter grooves 11 and the blades 41 is reduced.
The blade 41 can be directly arranged on the connecting shaft 3, such as welding connection or screw connection with the connecting shaft 3, preferably, the blade 41 is arranged on the outer wall of a positioning sleeve 42, the blade 41 and the positioning sleeve 42 are integrally formed, the positioning sleeve 42 is cylindrical, the connecting shaft 3 is a stepped shaft, one end of the positioning sleeve 42 is attached to the stepped surface of the connecting shaft 3, and the other end of the positioning sleeve 42 is clamped by a clamp spring 5, so that the connecting shaft can be quickly disassembled and assembled.
Because this filter unit is long and thin piece, generally install it on filter unit through the screw thread, need rotate cartridge filter 1 during the installation, cartridge filter 1 produces deformation easily, therefore, cartridge filter 1's outer wall is provided with the loading and unloading groove 12, and the loading and unloading groove 12 is a plurality of and evenly arranges in circumference. During installation, an auxiliary sleeve is adopted, the inner wall of the auxiliary sleeve is provided with a boss, the boss is matched with the loading and unloading groove 12, and the filter cartridge 1 can be driven to rotate when the auxiliary sleeve is rotated, so that the support seat 2 is installed on the support disc 110 of the wireless inclinometer while drilling, and the filter cartridge 1 is prevented from deforming.
As shown in fig. 3, 4 and 5, one end of the upper end surface of the blade 41 away from the connecting shaft 3 is provided with an upper inclined surface 43, one end of the lower end surface of the blade 41 away from the connecting shaft 3 is provided with a lower inclined surface 44, the upper and lower sections of the blade 41 are provided with inclined surfaces, and the blade 41 can push out impurities when moving up and down along the axial direction to clean the strip-shaped filter tank 11. Specifically, the angle β of the upper and lower inclined surfaces 43 and 44 to the axial direction of the filter cartridge 1 is 40 ° to 60 °. Meanwhile, the radial length t2 of the upper inclined surface 43 and the lower inclined surface 44 is greater than the thickness t1 of the strip filter tank 11.
The filter chamber of the filter cartridge 1 is a stepped hole, the upper outer diameter t4 of the filter chamber is smaller than the lower inner diameter t5 of the filter chamber, and the outer edge diameter t3 of the vane 41 is located between the upper outer diameter t4 of the filter chamber and the lower inner diameter t5 of the filter chamber. The length t6 of the strip-shaped filter tank 11 is more than 3 times of the axial length of the blades 41, so that enough space is available for the blades 41 to move axially, and the blades 41 are prevented from striking the upper ends of the strip-shaped filter tank 11; on the other hand, the area of the passage of the drilling fluid into the filter cavity can be ensured, and erosion of the blade 41 by the drilling fluid is reduced. The thickness t7 of the vane 41 and the width t8 of the strip filter tank 11 satisfy: 0.9×t8< t7< t8.
The wireless inclinometer of the self-cleaning filtering mechanism of the wireless inclinometer comprises a body 100, wherein the body 100 adopts various existing wireless inclinometer structures, a supporting disc 110 is arranged at the upper end of the body 100, a center rod 120 is arranged inside the body, a supporting seat 2 is connected with the supporting disc 110, a connecting shaft 3 is connected with the center rod 120, specifically, the supporting seat 2 is in threaded connection with the supporting disc 110, and a connecting shaft 3 is in threaded connection with the center rod 120.
The working principle of the wireless inclinometer of the invention is as follows: after starting, the central rod 120 of the pulse generator moves up and down along the axial direction, the central rod 120 drives the connecting shaft 3 to move up and down, so that the blades 41 are driven to move up and down, impurities in the strip-shaped filter tank 11 are cleaned along with the axial movement of the blades 41, and the strip-shaped filter tank 11 is prevented from being blocked by the impurities in drilling fluid.
The positional or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "upper", "lower", etc. in the foregoing are based on the positional or positional relationship shown in the drawings, are merely for convenience of description and simplification of the description, and are not indicative or implying that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Claims (9)
1. The wireless inclinometer comprises a body (100), wherein a supporting disc (110) is arranged at the upper end of the body (100), and a center rod (120) is arranged in the body, and the wireless inclinometer is characterized by comprising a self-cleaning filtering mechanism, wherein the self-cleaning filtering mechanism comprises a supporting seat (2), a filter cartridge (1) and a connecting shaft (3), the supporting seat (2) is provided with a central through hole, a filter cavity is arranged in the filter cartridge (1), the top of the filter cartridge (1) is sealed, and the bottom of the filter cartridge is connected with the supporting seat (2); the connecting shaft (3) penetrates through the supporting seat (2) and extends to the top of the filter cavity of the filter cartridge (1), and the central through hole and the filter cavity are in clearance fit with the connecting shaft (3); the top of the filter cartridge (1) is provided with an axial strip-shaped filter groove (11), a flow channel (31) axially extending to the lower end of the connecting shaft (3) is arranged in the connecting shaft (3), and the flow channel (31) is communicated with the filter cavity; the outer wall of the connecting shaft (3) is provided with blades (41), and the blades (41) are positioned in the strip-shaped filter grooves (11) and are in clearance fit with the strip-shaped filter grooves (11); the supporting seat (2) is connected with the supporting disc (110), and the connecting shaft (3) is connected with the central rod (120).
2. The wireless inclinometer according to claim 1, wherein one end of the upper end surface of the blade (41) far away from the connecting shaft (3) is provided with an upper inclined surface (43), one end of the lower end surface of the blade (41) far away from the connecting shaft (3) is provided with a lower inclined surface (44), and the upper inclined surface (43) and the lower inclined surface (44) both form an angle of 40-60 degrees with the axial direction of the filter cartridge (1); the radial length of the upper inclined surface (43) and the lower inclined surface (44) is larger than the thickness of the strip-shaped filter groove (11).
3. The wireless inclinometer according to claim 1, wherein the flow channel (31) penetrates the connecting shaft (3) such that an upper port of the flow channel (31) is connected to the filter cavity.
4. A wireless inclinometer according to claim 3, wherein the side wall of the connecting shaft (3) is provided with a drainage hole (32) which radially communicates the flow channel (31) with the filter cavity.
5. The wireless inclinometer according to claim 1, wherein the side wall of the filter cartridge (1) is provided with a plurality of radial diversion holes (13).
6. The wireless inclinometer according to claim 1, wherein the blade (41) is arranged on the outer wall of a positioning sleeve (42), the connecting shaft (3) is a stepped shaft, one end of the positioning sleeve (42) is attached to the stepped surface of the connecting shaft (3), and the other end of the positioning sleeve is clamped by a clamp spring (5).
7. The wireless inclinometer according to claim 1, wherein the outer wall of the filter cartridge (1) is provided with a loading and unloading slot (12).
8. The wireless inclinometer according to claim 1, wherein the plurality of strip-shaped filter grooves (11) is provided, the outer wall of the connecting shaft (3) is provided with a plurality of blades (41), and each blade (41) is located in one strip-shaped filter groove (11).
9. The wireless inclinometer according to claim 1, wherein the filter chamber of the filter cartridge (1) is a stepped bore, the upper outer diameter of the filter chamber is smaller than the lower inner diameter of the filter chamber, and the outer diameter of the blade (41) is located between the upper outer diameter of the filter chamber and the lower inner diameter of the filter chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911070986.9A CN110652765B (en) | 2019-11-05 | 2019-11-05 | Self-cleaning filtering mechanism of wireless inclinometer while drilling and wireless inclinometer while drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911070986.9A CN110652765B (en) | 2019-11-05 | 2019-11-05 | Self-cleaning filtering mechanism of wireless inclinometer while drilling and wireless inclinometer while drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110652765A CN110652765A (en) | 2020-01-07 |
| CN110652765B true CN110652765B (en) | 2024-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911070986.9A Active CN110652765B (en) | 2019-11-05 | 2019-11-05 | Self-cleaning filtering mechanism of wireless inclinometer while drilling and wireless inclinometer while drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110652765B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100101966A (en) * | 2009-03-10 | 2010-09-20 | 주식회사 한성환경기연 | Screen for waste remover |
| CN201620886U (en) * | 2010-01-20 | 2010-11-03 | 北京中联博韬科技咨询有限公司 | Slurry filter device of wireless inclinometer |
| CN202777985U (en) * | 2012-06-26 | 2013-03-13 | 绍兴市国富环保科技有限公司 | Grating cleaning machine |
| CN204782994U (en) * | 2015-07-17 | 2015-11-18 | 成都市翻鑫家科技有限公司 | It is wireless along with boring inclinometer impulse generator |
| CN109925772A (en) * | 2019-04-16 | 2019-06-25 | 岳西神农氏农业科技有限公司 | The filter device extracted for plant component |
| CN211133160U (en) * | 2019-11-05 | 2020-07-31 | 西华大学 | Self-cleaning filtering mechanism of wireless inclinometer and wireless inclinometer |
-
2019
- 2019-11-05 CN CN201911070986.9A patent/CN110652765B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100101966A (en) * | 2009-03-10 | 2010-09-20 | 주식회사 한성환경기연 | Screen for waste remover |
| CN201620886U (en) * | 2010-01-20 | 2010-11-03 | 北京中联博韬科技咨询有限公司 | Slurry filter device of wireless inclinometer |
| CN202777985U (en) * | 2012-06-26 | 2013-03-13 | 绍兴市国富环保科技有限公司 | Grating cleaning machine |
| CN204782994U (en) * | 2015-07-17 | 2015-11-18 | 成都市翻鑫家科技有限公司 | It is wireless along with boring inclinometer impulse generator |
| CN109925772A (en) * | 2019-04-16 | 2019-06-25 | 岳西神农氏农业科技有限公司 | The filter device extracted for plant component |
| CN211133160U (en) * | 2019-11-05 | 2020-07-31 | 西华大学 | Self-cleaning filtering mechanism of wireless inclinometer and wireless inclinometer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110652765A (en) | 2020-01-07 |
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