CN214576779U - Low-pressure water outlet structure at bottom of high-pressure rotary jet drill bit - Google Patents
Low-pressure water outlet structure at bottom of high-pressure rotary jet drill bit Download PDFInfo
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- CN214576779U CN214576779U CN202120461322.1U CN202120461322U CN214576779U CN 214576779 U CN214576779 U CN 214576779U CN 202120461322 U CN202120461322 U CN 202120461322U CN 214576779 U CN214576779 U CN 214576779U
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Abstract
The utility model relates to the field of underground operation equipment, in particular to a low-pressure water outlet structure at the bottom of a high-pressure rotary jet drill bit; the drill bit comprises a drill bit body, a water inlet pipe orifice, a pressure driving valve and a water outlet pipe orifice, wherein the water inlet pipe orifice, the valve and the water outlet pipe orifice are all arranged at the bottom of the drill bit body; the water inlet pipe orifice and the water outlet pipe orifice are connected in series, and a pressure driving valve is also connected in series between the water inlet pipe orifice and the water outlet pipe orifice; the pressure-driven valve is in a default position opening state, so that water can enter the water inlet pipe orifice and is ejected outwards through the water outlet pipe orifice; when the pressure-driven valve is pressed, the valve is changed into a closed state, so that the water flow between the water inlet pipe orifice and the water outlet pipe orifice is cut off. The low-pressure water outlet structure is beneficial to the purpose of pre-cleaning the hole in the downward advancing process of the drill bit, and can be automatically closed when the drill bit works, so that the drill bit is recovered to a conventional working state.
Description
Technical Field
The utility model relates to an underground operation equipment field specifically is a low pressure water outlet structure of high pressure jet grouting drill bit bottom.
Background
To traditional high pressure jet-grouting drill bit, its water outlet nozzle position is single and only can carry out single high pressure water outlet function, so, to the drill bit at the operation in-process, lack the leading cleaning function to the hole to be unfavorable for subsequent jet-grouting pore-forming operation effect. In order to realize bottom multifunctional injection, multiple pipelines are required to be configured, so that the problems of resource waste and weight increment and thickening of the drilling tool exist for the function of infrequent use.
Disclosure of Invention
An object of the utility model is to overcome above-mentioned defect, provide one kind can spout the drill bit initial stage of operation soon at high pressure, the low pressure play water effect of low worker and then carry out the high pressure of cleaning function in advance to the hole and spout the low pressure play water structure of drill bit bottom soon.
In order to achieve the above object, the present invention is realized as follows:
a low-pressure water outlet structure at the bottom of a high-pressure rotary spraying drill bit comprises a drill bit body, a water inlet pipe orifice, a pressure driving valve and a water outlet pipe orifice, wherein the water inlet pipe orifice, the valve and the water outlet pipe orifice are all arranged at the bottom of the drill bit body; the water inlet pipe orifice and the water outlet pipe orifice are connected in series, and a pressure driving valve is also connected in series between the water inlet pipe orifice and the water outlet pipe orifice; the pressure-driven valve is in a default position opening state, so that water can enter the water inlet pipe orifice and is ejected outwards through the water outlet pipe orifice; when the pressure-driven valve is pressed, the valve is changed into a closed state, so that the water flow between the water inlet pipe orifice and the water outlet pipe orifice is cut off.
The high pressure spouts the low pressure water outlet structure of drill bit bottom soon, pressure drive valve sets up the bottom at the drill bit body, pressure drive valve includes valve rod, case, reset spring and end cover, wears to establish reset spring between valve rod and the case, and the end cover setting is in the terminal surface of drill bit body bottom and with valve rod, case, reset spring seal among the drill bit body.
The high-pressure rotary spraying drill bit is characterized in that the low-pressure water outlet structure is arranged at the bottom of the high-pressure rotary spraying drill bit, the water inlet pipe orifice is annular and horizontally arranged along the radial direction of the drill bit body, the water outlet pipe orifice is arranged in a hollow pipe section, and the pipe section is arranged in the valve rod in a penetrating mode.
This low pressure goes out water structure and adopts above-mentioned design, the case sets up among the drill bit body and tightly with its top by reset spring, so, when pressure is lower in the drill bit body, pressure-actuated valve keeps open mode, so, rivers can follow the mouth of pipe of intaking through pressure-actuated valve and flow to the mouth of pipe of water outlet and finally shoot to the external world, and when pressure rises and surpasss reset spring's top tight power in the drill bit body, then the case receives pressure and slides and cut off the mouth of pipe of water inlet and the direct rivers of the mouth of pipe of water outlet, thereby realize the sealing effect.
Through above-mentioned function, this low pressure goes out water structure and is favorable to the drill bit to march downwards and carry and spout the in-process, to the injection function of difference, realizes the single tube pressure switch, carries out the low pressure to the hole and washs in advance to when the normal high pressure work of drill bit, self-closing bottom washs, makes the drill bit resume conventional operating condition.
Drawings
Fig. 1 is an assembly view of a low-pressure water outlet structure according to an embodiment.
Detailed Description
The invention is further illustrated by the following specific examples.
As shown in fig. 1, a low-pressure water outlet structure at the bottom of a high-pressure rotary jet drill bit comprises a drill bit body 1, a water inlet pipe orifice 2, a pressure-driven valve 3 and a water outlet pipe orifice 4, wherein the water inlet pipe orifice 2, the pressure-driven valve 3 and the water outlet pipe orifice 4 are all arranged at the bottom of the drill bit body 1; the water inlet pipe orifice 2 and the water outlet pipe orifice 4 are connected in series, and a pressure driving valve 3 is also connected in series between the water inlet pipe orifice and the water outlet pipe orifice; the pressure-driven valve 3 is in an opening state by default, so that water can enter the water inlet pipe orifice 2 and is ejected outwards through the water outlet pipe orifice 4; when the pressure-driven valve 3 is pressed, the valve is in a closed state, so that the water flow between the water inlet pipe orifice 2 and the water outlet pipe orifice 4 is cut off; the pressure driving valve 3 is arranged at the bottom end of the drill bit body 1 and comprises a valve rod 31, a valve core 32, a return spring 33 and an end cover 34, the return spring 33 penetrates between the valve rod 31 and the valve core 32, and the end cover 34 is arranged on the end face of the bottom end of the drill bit body 1 and seals the valve rod 31, the valve core 32 and the return spring 33 in the drill bit body 1.
In the low water outlet structure, the water inlet pipe orifice is annular and horizontally arranged along the radial direction of the drill bit body, and the water outlet pipe orifice is arranged in a hollow pipe section which is arranged in the valve rod in a penetrating way.
The embodiment shows that the structure adds a low-pressure water outlet structure without changing the bottom of the original jet pile-forming drill bit, the structure has the function of automatically switching high pressure and low pressure, water is jetted through the water outlet structure and the jet orifice of the drilling tool to clean the hole during low pressure, the damage of obstacles in the hole to the drilling tool during the drilling process is effectively avoided, the water outlet structure is automatically closed during high pressure, and high-pressure jet flow is jetted through the jet orifice of the original drill bit to form the pile.
Claims (3)
1. The utility model provides a low pressure of high pressure jet-grouting drill bit bottom goes out water structure, its includes the drill bit body, characterized by: the drill bit further comprises a water inlet pipe orifice, a pressure driving valve and a water outlet pipe orifice, wherein the water inlet pipe orifice, the valve and the water outlet pipe orifice are all arranged at the bottom of the drill bit body; the water inlet pipe orifice and the water outlet pipe orifice are connected in series, and a pressure driving valve is also connected in series between the water inlet pipe orifice and the water outlet pipe orifice; the pressure-driven valve is in a default position opening state, so that water can enter the water inlet pipe orifice and is ejected outwards through the water outlet pipe orifice; when the pressure-driven valve is pressed, the valve is changed into a closed state, so that the water flow between the water inlet pipe orifice and the water outlet pipe orifice is cut off.
2. The low-pressure water outlet structure at the bottom of the high-pressure rotary jet drill bit as claimed in claim 1, wherein: the pressure drive valve is arranged at the bottom end of the drill bit body and comprises a valve rod, a valve core, a reset spring and an end cover, the reset spring is arranged between the valve rod and the valve core in a penetrating mode, and the end cover is arranged on the end face of the bottom end of the drill bit body and seals the valve rod, the valve core and the reset spring in the drill bit body.
3. The low-pressure water outlet structure at the bottom of the high-pressure rotary jet drill bit as claimed in claim 1, wherein: the water inlet pipe orifice is annular and is horizontally arranged along the radial direction of the drill bit body, the water outlet pipe orifice is arranged in a hollow pipe section, and the pipe section is arranged in the valve rod in a penetrating mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120461322.1U CN214576779U (en) | 2021-03-03 | 2021-03-03 | Low-pressure water outlet structure at bottom of high-pressure rotary jet drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120461322.1U CN214576779U (en) | 2021-03-03 | 2021-03-03 | Low-pressure water outlet structure at bottom of high-pressure rotary jet drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214576779U true CN214576779U (en) | 2021-11-02 |
Family
ID=78318233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120461322.1U Active CN214576779U (en) | 2021-03-03 | 2021-03-03 | Low-pressure water outlet structure at bottom of high-pressure rotary jet drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214576779U (en) |
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2021
- 2021-03-03 CN CN202120461322.1U patent/CN214576779U/en active Active
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