CN218765942U - Simple multifunctional reverse circulation drill nozzle test bed - Google Patents
Simple multifunctional reverse circulation drill nozzle test bed Download PDFInfo
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- CN218765942U CN218765942U CN202222373797.2U CN202222373797U CN218765942U CN 218765942 U CN218765942 U CN 218765942U CN 202222373797 U CN202222373797 U CN 202222373797U CN 218765942 U CN218765942 U CN 218765942U
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Abstract
The utility model discloses a simple and easy multi-functional reverse circulation drill bit nozzle test bench, including the support, can dismantle on the support and install the nozzle pipe, the nozzle pipe bottom is fixed with the support, and the outside cover in upper portion is equipped with the outer tube, and the outer tube lateral wall is provided with the intake pipe, and the coaxial inner tube that is provided with in the outer tube, the inner tube top is fixed and sealed with the outer tube through the flange, and the lower pot head is established outside the nozzle pipe and is left the clearance, the inner tube lower extreme inboard is provided with inclined plane one, and the outside of nozzle pipe upper end is provided with inclined plane two corresponding to inclined plane one, and inclined plane one inclined plane two parallel arrangement; and a pressure sensor and a flow sensor are arranged at the bottom of the nozzle pipe. The utility model discloses to return circulation drill bit and simplify, only change a small amount of parts and can simulate out the nozzle structure of isostructure, the reverse circulation effect of the different nozzle forms of flow sensor and the pressure sensor test through the bottom installation has simultaneously shortened the design processing cycle of drill bit greatly, has reduced experimentation cost by a wide margin.
Description
Technical Field
The utility model belongs to the technical field of the probing, especially, relate to a simple and easy multi-functional reverse circulation drill bit nozzle test bench.
Background
The air down-the-hole hammer reverse circulation pipe-following drilling technology is widely applied to pile foundation hole forming construction due to the advantages of stability and high efficiency, and particularly plays an important role when a rotary drilling rig slowly advances to a hard rock area, a drill bit is seriously abraded and even a hole cannot be formed. However, in the construction environment with complex geological conditions for rock fracture development, the problems of difficult formation of reverse circulation, low drilling efficiency, difficult pipe following and the like often occur. The drill bit nozzle structure is used as a key part for determining the good and bad reverse circulation effect, and has important significance for improving and optimizing the drill bit structure and improving the reverse circulation effect of the drill bit. However, the reverse circulation drill bit has a complex structure and a difficult processing technique, and if the reverse circulation drill bit with different nozzle structures needs to be processed for testing, a lot of time and cost are consumed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough to the background art provides a simple and easy multi-functional reverse circulation drill bit nozzle test bench, will reverse circulation drill bit and simplify, only change a small amount of parts and can simulate out the nozzle structure of isostructure, through the reverse circulation effect of the different nozzle forms of flow sensor and the pressure sensor test of bottom installation simultaneously, shortened the design process cycle of drill bit greatly, reduced testing cost by a wide margin.
The utility model discloses a solve above-mentioned technical problem and adopt following technical scheme:
a simple multifunctional reverse circulation drill nozzle test bed comprises a support, wherein a nozzle pipe is detachably mounted on the support, the bottom of the nozzle pipe is fixed with the support, an outer pipe is sleeved on the outer side of the upper part of the nozzle pipe, an air inlet pipe is arranged on the side wall of the outer pipe, an inner pipe is coaxially arranged in the outer pipe, the top end of the inner pipe is fixed and sealed with the outer pipe through a flange, the lower end of the inner pipe is sleeved outside the nozzle pipe and is provided with a gap, the inner side of the lower end of the inner pipe is provided with a first inclined surface, the outer side of the upper end of the nozzle pipe is provided with a second inclined surface corresponding to the first inclined surface, and the first inclined surface and the second inclined surface are arranged in parallel; and a pressure sensor and a flow sensor are arranged at the bottom of the nozzle pipe.
Further, the support includes the base, installs the bottom plate on the base, is provided with the diameter on the bottom plate and is greater than the round hole of nozzle pipe, nozzle pipe bottom sets up the flange, and nozzle pipe and round hole butt joint are fixed on the bottom plate through the bolt.
Furthermore, the inner pipe is divided into an upper inner pipe and a lower inner pipe, the top of the upper inner pipe is connected with the outer pipe through a flange, and the bottom of the upper inner pipe is in threaded connection with the lower inner pipe.
Furthermore, the side wall of the nozzle pipe is provided with spiral flow guiding ribs.
Further, the circular hole below is provided with the breathing pipe, and the breathing pipe is connected with the bottom plate diapire, pressure sensor and flow sensor all install on the breathing pipe.
The utility model adopts the above technical scheme to compare with prior art, have following technological effect:
the utility model discloses simple structure, processing is convenient, can simulate out the nozzle form of isostructure through the nozzle pipe and the inner tube of changing the isostructure, has shortened the design process cycle of processing isostructure reverse circulation drill bit greatly, has also reduced the processing cost of drill bit by a wide margin, has the significance to optimizing reverse circulation drill bit design.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a nozzle structure formed by the nozzle tube and the inner tube;
FIG. 3 is a schematic view of a different form of nozzle tube configuration.
In the figure, 1, a base; 2. a base plate; 3. a nozzle tube; 4. an inner tube; 5. an outer tube; 6. an air inlet pipe; 7. a pressure sensor interface; 8. an air intake duct; 401. an upper inner tube; 402. and (4) a lower inner pipe.
Detailed Description
The technical scheme of the utility model is further explained in detail with the attached drawings as follows:
a simple multifunctional reverse circulation drill nozzle test bed is shown in figures 1, 2 and 3 and comprises a support, a nozzle pipe 3 is detachably mounted on the support, the bottom of the nozzle pipe 3 is fixed with the support, an outer pipe 5 is sleeved on the outer side of the upper portion of the nozzle pipe 3, an air inlet pipe 6 is arranged on the side wall of the outer pipe 5, an inner pipe 4 is coaxially arranged in the outer pipe 5, the top end of the inner pipe 4 is fixed and sealed with the outer pipe 5 through a flange, the lower end of the inner pipe is sleeved outside the nozzle pipe 3 and a gap is reserved, a first inclined surface is arranged on the inner side of the lower end of the inner pipe 4, a second inclined surface corresponding to the first inclined surface is arranged on the outer side of the upper end of the nozzle pipe 3, and the first inclined surface and the second inclined surface are arranged in parallel; and a pressure sensor and a flow sensor are arranged at the bottom of the nozzle pipe 3.
The utility model discloses in, the support includes base 1, installs bottom plate 2 on the base 1, is provided with the round hole that the diameter is greater than nozzle pipe 3 on the bottom plate 2, nozzle pipe 3 bottom sets up the flange, and nozzle pipe 3 docks with the round hole and passes through the bolt fastening on bottom plate 2. So that the nozzle pipe 3 can be more conveniently disassembled and replaced.
The inner pipe 4 is divided into an upper inner pipe 401 and a lower inner pipe 402, the top of the upper inner pipe 401 is connected with the outer pipe 5 through a flange, and the bottom of the upper inner pipe 401 is in threaded connection with the lower inner pipe 402. So that the inner tube 402 can be directly removed to change the length of the inner tube 4.
The side wall of the nozzle pipe 3 is provided with spiral flow guiding ribs or flow guiding ribs in other forms, and the influence of the flow guiding ribs on the use parameters of the nozzle pipe 3 is detected by continuously changing the flow guiding forms.
And an air suction pipe 8 is arranged below the round hole, the air suction pipe 8 is connected with the bottom wall of the bottom plate 2, the pressure sensor and the flow sensor are both installed on the air suction pipe 8, and the side wall of the air suction pipe 8 is provided with a pressure sensor interface 7 connected with the pressure sensor. The function of the air suction pipe 8 is to conveniently connect a pressure sensor and a flow sensor, and the suction capacity (reverse circulation effect) of the reverse circulation drill bit is tested by measuring the negative pressure formed in the inner cavity of the air suction pipe 8 and the flow of the sucked air.
The utility model discloses a theory of operation: during the experiment, high-pressure gas enters from the air inlet pipe 6, enters a channel between the inner pipe and the outer pipe, is sprayed upwards at a high speed by an annular nozzle formed by matching the nozzle pipe 3 and the lower inner pipe 402, forms a negative pressure area near the nozzle pipe 3, and sucks external gas into the inner pipe 4 through the air suction pipe. The process simulates the working principle that after high-pressure gas reaches the position of the bottom drill bit, reverse circulation is formed through the injection action of the drill bit nozzle. The utility model aims to provide a nozzle form that can be convenient, the different length of change of low cost, thickness and the nozzle pipe 3 of different shapes and inner tube simulate out the isostructure to change the distance S between the inclined plane one of inner tube and the inclined plane two of nozzle pipe, and inclined plane one and the contained angle alpha of horizontal plane, through the reverse circulation effect under the flow sensor of bottom installation and the pressure sensor test its different conditions, be applied to reverse circulation drill bit structural design with optimal nozzle structure and parameter again, thereby optimize reverse circulation drill bit.
The utility model discloses simple structure, processing is convenient, can simulate out the nozzle form of isostructure through the nozzle pipe 3 and the inner tube of changing the isostructure, has shortened the design process cycle of processing isostructure reverse circulation drill bit greatly, has also reduced the processing cost of drill bit by a wide margin, has the significance to optimizing reverse circulation drill bit design.
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.
Above embodiment only is for explaining the utility model discloses a technical thought can not be injectd with this the utility model discloses a protection scope, all according to the utility model provides a technical thought, any change of doing on technical scheme basis all falls into the utility model discloses within the protection scope. Although 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 scope of knowledge possessed by those skilled in the art.
Claims (5)
1. The utility model provides a simple and easy multi-functional reverse circulation drill bit nozzle test bench which characterized in that: the nozzle comprises a bracket, wherein a nozzle pipe is detachably arranged on the bracket, the bottom of the nozzle pipe is fixed with the bracket, the outer side of the upper part of the nozzle pipe is sleeved with an outer pipe, the side wall of the outer pipe is provided with an air inlet pipe, the inner pipe is coaxially arranged in the outer pipe, the top end of the inner pipe is fixed and sealed with the outer pipe through a flange, the lower end of the inner pipe is sleeved outside the nozzle pipe and is provided with a gap, the inner side of the lower end of the inner pipe is provided with a first inclined plane, the outer side of the upper end of the nozzle pipe is provided with a second inclined plane corresponding to the first inclined plane, and the first inclined plane and the second inclined plane are arranged in parallel; and a pressure sensor and a flow sensor are arranged at the bottom of the nozzle pipe.
2. The simple multifunctional reverse circulation drill nozzle test bed according to claim 1, characterized in that: the support comprises a base, a bottom plate is mounted on the base, a round hole with the diameter larger than that of the nozzle pipe is formed in the bottom plate, a flange is arranged at the bottom of the nozzle pipe, and the nozzle pipe is in butt joint with the round hole and is fixed on the bottom plate through a bolt.
3. The simple multifunctional reverse circulation drill nozzle test bed according to claim 1, characterized in that: the inner pipe is divided into an upper inner pipe and a lower inner pipe, the top of the upper inner pipe is connected with the outer pipe through a flange, and the bottom of the upper inner pipe is in threaded connection with the lower inner pipe.
4. The simple multifunctional reverse circulation drill nozzle test bed according to claim 1, characterized in that: and spiral flow guide ribs are arranged on the side wall of the nozzle pipe.
5. The simple multifunctional reverse circulation drill nozzle test bed according to claim 2, characterized in that: the round hole below is provided with the breathing pipe, and the breathing pipe is connected with the bottom plate diapire, pressure sensor and flow sensor all install on the breathing pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222373797.2U CN218765942U (en) | 2022-09-07 | 2022-09-07 | Simple multifunctional reverse circulation drill nozzle test bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222373797.2U CN218765942U (en) | 2022-09-07 | 2022-09-07 | Simple multifunctional reverse circulation drill nozzle test bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218765942U true CN218765942U (en) | 2023-03-28 |
Family
ID=85693913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222373797.2U Active CN218765942U (en) | 2022-09-07 | 2022-09-07 | Simple multifunctional reverse circulation drill nozzle test bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218765942U (en) |
-
2022
- 2022-09-07 CN CN202222373797.2U patent/CN218765942U/en active Active
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