CN210858799U - Pressure self-balancing ultra-high pressure sealing water braid - Google Patents
Pressure self-balancing ultra-high pressure sealing water braid Download PDFInfo
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- CN210858799U CN210858799U CN201921278903.0U CN201921278903U CN210858799U CN 210858799 U CN210858799 U CN 210858799U CN 201921278903 U CN201921278903 U CN 201921278903U CN 210858799 U CN210858799 U CN 210858799U
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Abstract
A pressure self-balancing ultra-high pressure sealing water braid comprises a mandrel, a water braid shell, a gland, a pressing wire, a transition pressing disc, a rotary bearing and a thrust ball bearing. The core shaft penetrates through the gland, the bearing, the transition pressure plate and the pressing wire to be arranged in the water braid shell, rotary bearings are arranged on two sides of a shaft shoulder of the core shaft to support the core shaft in the water braid shell, the transition pressure plate plays a transition role in converting the stress directions of two bearings from radial direction to axial direction between the rotary bearings and the thrust ball bearing, the gland is arranged at the right end of the water braid shell, sealing elements are arranged between the end cover and the core shaft and between the end cover and the water braid shell, and a water through hole is formed in the core shaft and communicated with a water drain hole at the left end of the water braid shell; the left end of the inside of the water swivel shell is provided with a high-pressure sealing element matched with the mandrel, the inside of the mandrel and high-pressure water communicated with the water swivel are isolated to play a sealing role, and the left end of the water swivel shell is provided with a thread matched with the drill rod. The utility model discloses can be connected with the drilling rod and rotate along with the drilling rod and the dabber is motionless, can bear great pressure, have connect convenient, wear-resisting and the good advantage of sealing performance.
Description
Technical Field
The invention relates to the field of coal mine underground gas treatment, in particular to the technical fields of high-pressure water cutting, punching and the like in drilling.
Background
In the coal mining process, because coal seams often contain a large amount of gas, measures are needed to reduce the gas content of the coal seams before mining, and the danger is eliminated. Generally, a drilling machine is adopted to drill holes in a coal seam, gas extraction is carried out through negative pressure, and the gas can be extracted after the pressure and the content of the gas reach the standard. Because the coal seam permeability of China is poor, the influence radius of a single extraction hole is small and the requirement is difficult to meet; the efficiency is low only by the automatic release of gas; it is difficult to meet the production requirements. In order to improve the gas extraction efficiency, the most effective method in the current stage is to use high-pressure water jet to slit or punch a coal seam after drilling, and secondarily expand the actual influence range of the drilled hole, so that the radius of the drilled hole is increased, and the extraction efficiency is improved. Therefore, the drill rod used for drilling is required to be directly used for punching and slotting, high-pressure water flows in the drill rod during punching and slotting, and in order to ensure that the high-pressure water of the high-pressure rubber pipe smoothly enters the continuously rotating drill rod, higher requirements are provided for a water braid at the tail part of the drill rod, the drill rod not only bears the high pressure of more than 30MPA, but also carries out dynamic sealing in a rotating state, the smooth rotation is ensured on the premise of ensuring the sealing, water cannot enter the water braid, the internal parts are prevented from rusting, and meanwhile, the service life of a sealing element is required to be long; because of the large internal pressure, the internal structure must be stressed reasonably to prevent friction between the components.
Disclosure of Invention
The invention relates to a pressure self-balancing ultrahigh pressure sealing water braid, which is used for conveying high-pressure water into a rotating drill rod through a static high-pressure rubber pipe while drilling or water conservancy slotting by rotating the drill rod.
The solution of the invention is as follows: the left side of a pressure self-balancing ultra-high pressure sealing water braid shell is provided with threads matched with a drill rod and connected with the drill rod, and a right side mandrel is connected with a high-pressure rubber pipe. Wherein the water braid shell, the pressing wire, the mandrel, the transition pressure plate and the gland are concentrically connected from left to right, the right side of the mandrel is connected with the high-pressure rubber pipe, the water braid shell is connected with the high-pressure sealing drill rod, the mandrel penetrates through the pressing wire, the transition pressure plate and the gland to penetrate into the water braid shell, the mandrel and the water braid shell are relatively rotatably connected, the gland is connected with the water braid shell through a bolt, the gland is provided with a first sealing groove and a second sealing groove, a sealing chamfer surface which is matched with the second sealing groove of the gland in a direction is arranged at an orifice at the right side of the water braid shell, sealing parts are respectively arranged in the first sealing groove and the second sealing groove, a high-pressure combined seal is arranged between the mandrel and an inner hole of the water braid shell, the pressing wire is provided with external threads, the high-pressure combined seal is fixed in the water braid shell through pressing wire threads, and rotary bearings, two bearing inner circles all push up in the shaft shoulder both sides, left side bearing inner race pushes up the left side in place water braid casing hole, the inner circle right side top of right side bearing is in path one side of transition pressure disk, the tight avris of thrust ball bearing is pushed up to the big footpath one side of transition pressure disk, the loose avris of thrust ball bearing is connected with the gland of fixing on the water braid casing, be provided with the water hole in the dabber, be provided with the water hole on the water braid casing, the dabber is crossed the water hole and is crossed the water hole with the water braid casing and be linked together, water braid casing excircle is milled and is added the plane of holding in order to make things convenient.
Furthermore, the right side of the mandrel and the high-pressure rubber pipe are connected in a quick connector form which is commonly used in coal mines.
Furthermore, the gland is fixed on the water swivel shell through bolts, the gland is provided with a first sealing groove and a second sealing groove, a sealing chamfer surface matched with the second sealing groove of the gland is arranged at the orifice at the right side of the water swivel shell, and the sealing effect is respectively realized on the gap between the core shaft and the gland and the gap between the gland and the water swivel shell.
Furthermore, inside fully filling lubricating oil of water swivel casing, lubricating oil will play lubricated bearing and rust-resistant effect, can balance the high pressure water pressure that the front end sealing washer received, still has lubricated sealing washer simultaneously and prevents that the water under high pressure from getting into inside the water swivel.
Furthermore, the bearing inside the water braid shell uses a combination of a radial stressed bearing and an axial stressed bearing, the radial stressed bearing playing a supporting role is two deep groove ball bearings, and the radial stressed bearing playing an axial stressed role is a thrust ball bearing.
Further, a transition pressure plate is used between the two different bearings.
Furthermore, the left side of the mandrel and the water braid water holes are sealed in a high-pressure combined mode, the pressing wire is connected with the inner threads of the water braid shell in a threaded mode to fix the high-pressure combined seal in the water braid shell, and the pressing wire is a left-handed thread.
Furthermore, the arrangement mode of the drill rod, the water braid shell, the mandrel and the high-pressure rubber pipe is linear, so that the high-pressure rubber pipe moves on the same straight line along with the drill rod and the water braid, and the rubber pipe is prevented from dragging the water braid in the radial direction.
Further, water swivel casing excircle has and adds holding plane (18), can make things convenient for water swivel assembly and disassembly tools like: pipe tongs, wrenches, etc.
The invention has the advantages that:
the inner part of the water braid adopts a combination mode of the deep groove ball bearings and the thrust ball bearings, and the two deep groove ball bearings bear radial force to play a role in supporting the core shaft, so that the core shaft is ensured to flexibly rotate in the use of the water braid; and thrust ball bearing bears the axial force, can guarantee that the inside can spare part of water swivel can not produce the axial float displacement when the water swivel bears the high pressure water.
The water braid gland disclosed by the invention adopts two sealing grooves, and lubricating oil is filled in a closed space formed in the water braid shell under the high-pressure combined sealing action of the gland sealing groove and the left side of the mandrel, so that the lubricating and anti-rust effects on bearing parts in the water braid shell can be realized, and a certain pressure can be kept in the water braid shell to prevent water leakage.
The high-pressure combined seal on the left side of the water braid mandrel adopts an open installation mode and is fixed by using a wire pressing. The open installation can guarantee to the utmost that the framework of the combined seal is not damaged in the installation process, and the wire pressing is left-handed thread to prevent the water swivel from tripping along with the rotation of the drill rod.
The water braid has the structural form that the arrangement mode of the drill rod, the water braid shell, the mandrel and the high-pressure rubber pipe is linear, so that the high-pressure rubber pipe moves on the same straight line along with the drill rod and the water braid, and the rubber pipe is prevented from radially pulling the water braid.
There is the plane of holding with water plait casing excircle, can make things convenient for water plait assembly and disassembly tools if: pipe tongs, wrenches, etc.
Drawings
FIG. 1 is a profile view of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
fig. 3 is a schematic view of the first and second seal grooves of the gland and the sealing chamfer surface of the port of the water swivel housing.
Reference numerals: 1. the water swivel comprises a mandrel, 2, a gland, 3, a sealing element, 4, a thrust ball bearing, 5, a transition pressure plate, 7, a pressing wire, 8, a high-pressure combined seal, 9, a water braid shell, 10, a water braid shell water passing hole, 11, a mandrel water passing hole, 13, a first gland seal groove, 14, a second gland seal groove, 15, a seal chamfer surface, 17, a shaft shoulder, 18, a clamping plane, 19, a sealing element, 20, a shell front end inner hole, 21, a threaded inner hole, 22, a rotary bearing, 23, a rotary bearing 24, a bearing mounting hole 25 and a drill rod connecting thread.
Detailed Description
As shown in fig. 1 to 3, a pressure self-balancing ultrahigh pressure sealing water swivel comprises a water swivel shell (9), a wire pressing (7), a mandrel (1), a transition pressure plate (5) and a gland (2) which are concentrically connected from left to right. The right side of the mandrel is connected with a high-pressure rubber pipe in a manner of a quick connector which is commonly used in coal mines, the left side of the mandrel is connected with a drill rod, and the connecting thread is a thread matched with the tail of the drill rod. The water braid shell (9) and the gland (2) can synchronously rotate under the driving of the drill rod, and the mandrel and the high-pressure rubber pipe are relatively static.
Gland (2) are fixed through bolt and water swivel casing (9), set up first seal groove (13) and second seal groove (14) on gland (2), place sealing member (3) and (19) respectively with the clearance of sealed dabber (1) and gland (2) and water swivel casing (9) drill way department clearance. Under the combined action of two sealing pieces at the position of the gland (2) and the high-pressure combined seal (8) at the left end of the mandrel, lubricating oil is filled in a sealing space formed in the water braid shell (9), so that the lubricating and rust-proof effects on bearing parts inside the water braid shell can be achieved, and the water braid shell can be kept at a certain pressure to prevent water leakage.
A high-pressure combined seal (8) is arranged between a mandrel (1) and an inner hole of a water braid shell (9), a pressing wire (7) is provided with an external thread, an internal thread is arranged at a threaded inner hole (21) of the water braid shell (9), the high-pressure sealed combination is fixed in the water braid shell (9) through the pressing wire (7) in a threaded manner, rotary bearings (22) and (23) are respectively arranged at the left side and the right side of a shaft shoulder (7) of the mandrel (1), inner rings of the two bearings are respectively propped at the two sides of the shaft shoulder, an outer ring of a left bearing (22) is propped at the left side of the inner hole (24) of the water braid shell, the right side of an inner ring of a right bearing is propped at one side of the small diameter of a transition pressure plate (5), one side of the large diameter of the transition pressure plate (5) is propped at the tight side of a thrust ball bearing (4), the loose side of the thrust ball bearing (4) is contacted with a gland fixed on the water, the water holes (11) of the mandrel are communicated with the water holes (10) of the water braid shell, and a clamping plane (18) is milled on the outer circle of the water braid shell to facilitate clamping of the water braid dismounting tool.
When the drill pipe is implemented, the right side of the mandrel (1) is connected with the high-pressure rubber pipe, the left side of the water swivel shell (9) is connected with the drill pipe, the mandrel (1) and the high-pressure rubber pipe are static relative to the water swivel shell (9), and the gland (2) and the water swivel shell (9) rotate together along with the drill pipe. The gland (2) is sealed twice, so that foreign matters such as external dust and water can enter the water swivel shell (9), and the lubricating oil in the water swivel shell (9) can be prevented from leaking, so that the purposes of internal lubrication, rust prevention, pressure maintaining and leakage prevention of the water swivel shell (9) are guaranteed. The high-pressure combined seal (8) can prevent high-pressure water from leaking from the contact position of the left side of the swivel water braid shell (9) and the mandrel (1) and prevent high-pressure water pressure loss. High-pressure water passes through the mandrel water through hole (11), the water braid shell water through hole (10) and the drill rod from the high-pressure rubber pipe in sequence until the drill hole is deep. When the water swivel is disassembled and assembled, a clamping plane (18) of the excircle of the water swivel shell can be clamped by using tools such as a pipe wrench and the like, so that the water swivel is convenient and quick. The invention has the characteristics of convenient connection, good sealing performance, excellent rust-proof and wear-resistant performance, long service life and the like.
Claims (5)
1. The utility model provides a pressure self-balancing super high pressure seals water swivel which characterized in that: a water braid shell (9), a wire pressing (7), a mandrel (1), a transition pressure plate (5), a gland (2), rotary bearings (22) and (23) and a thrust ball bearing (4) are concentrically connected from left to right; the left side of the water braid shell (9) is provided with threads matched with the drill rod and connected with the drill rod, and the right side mandrel (1) is connected with a high-pressure rubber pipe; the core shaft (1) penetrates through the wire pressing (7), the transition pressing disc (5) and the pressing cover (2) to penetrate into the water braid shell (9), and the core shaft (1) is connected with the water braid shell (9) in a relatively rotating mode; the gland (2) is connected with the water swivel shell (9), the gland (2) is provided with a first sealing groove (13) and a second sealing groove (14), a sealing chamfer surface (15) matched with the second sealing groove (14) of the gland (2) is arranged at a right-side orifice of the water swivel shell (9), and sealing elements are arranged in the first sealing groove (13) and the second sealing groove (14); be equipped with high-pressure combination seal (8) between casing front end hole (20) of dabber (1) and water braid casing (9), press silk (7) to be equipped with the external screw thread, screw hole (21) department of water braid casing (9) is equipped with the external screw thread, high-pressure combination seal (8) are fixed in water braid casing (9) through pressing silk (7) screw thread, and the both sides are provided with swivel bearing (22) and (23) respectively about shoulder (17) of dabber (1), and both bearings inner circle all pushes up in shoulder (17) both sides, and swivel bearing (22) outer lane top is in the left side of bearing mounting hole (24), and the inner circle right side top of swivel bearing (23) is in the path one side of transition pressure disk (5), and the big footpath one side top is in thrust ball bearing (4) tight avris side, and the gland (2) of fixing on water braid casing (9) of thrust ball bearing (4) are connected, be provided with the dabber in dabber (1) and cross water hole (11), be provided with water plait casing on water plait casing (9) and cross water hole (10), water hole (11) and water plait casing are crossed to the dabber and water hole (10) are linked together, and water plait casing (9) excircle is milled and is had to add and hold plane (18) to make things convenient for water plait assembly and disassembly tools to add to hold.
2. The pressure self-balancing ultra-high pressure sealing water swivel of claim 1, wherein: gland (2) are provided with first seal groove (13) and second seal groove (14), and water swivel casing (9) right side drill way department is equipped with gland (2) second seal groove (14) complex sealed chamfer face (15), sets up sealing member (3) and (19) in two seal grooves respectively to play sealed effect to the clearance between dabber (1) and gland (2) and the clearance between gland (2) and water swivel casing (9) respectively.
3. The pressure self-balancing ultra-high pressure sealing water swivel of claim 1, wherein: high pressure combination seal (8) adopt "open" mounting means, press silk (7) to pass through the threaded fixation in with thread hole (21) of water braid casing (9), its effect is fixed high pressure combination seal (8), the internal thread of pressing silk (7) and thread hole (21) is left-handed screw.
4. The pressure self-balancing ultra-high pressure sealing water swivel of claim 1, wherein: under the effect of high pressure combined seal (8), sealing element (3) and sealing element (19), a sealed space is formed inside water braid shell (9), and the space is full of lubricating oil, and lubricating oil has the effect of hydraulic balance of the left end and the right end of high pressure combined seal (8) and has the effect of preventing high-pressure water from permeating with certain capacity, and can lubricate sealing ring and bearing.
5. The pressure self-balancing ultra-high pressure sealing water swivel of claim 1, wherein: the inner bearings are arranged in a combined mode, the rotary bearings (22) and (23) are deep groove ball bearings, the rotary bearings (22) and (23) play a supporting role between the water braid shell (9) and the mandrel (1), bear radial load and guarantee axial concentricity of the rotary bearings, the thrust ball bearing (4) bears thrust of high-pressure water to the right side of the mandrel (1) between the transition pressure plate (5) and the gland (2), bears axial load and guarantees smooth rotation of the mandrel (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921278903.0U CN210858799U (en) | 2019-08-08 | 2019-08-08 | Pressure self-balancing ultra-high pressure sealing water braid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921278903.0U CN210858799U (en) | 2019-08-08 | 2019-08-08 | Pressure self-balancing ultra-high pressure sealing water braid |
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| CN210858799U true CN210858799U (en) | 2020-06-26 |
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| CN201921278903.0U Active CN210858799U (en) | 2019-08-08 | 2019-08-08 | Pressure self-balancing ultra-high pressure sealing water braid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307032A (en) * | 2019-08-08 | 2019-10-08 | 徐州博安科技发展有限责任公司 | A kind of pressure self-balancing superhigh pressure sealing water pigtail |
| CN112360357A (en) * | 2020-11-24 | 2021-02-12 | 无锡锡钻地质装备有限公司 | Tap subassembly for geological exploration |
-
2019
- 2019-08-08 CN CN201921278903.0U patent/CN210858799U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307032A (en) * | 2019-08-08 | 2019-10-08 | 徐州博安科技发展有限责任公司 | A kind of pressure self-balancing superhigh pressure sealing water pigtail |
| CN112360357A (en) * | 2020-11-24 | 2021-02-12 | 无锡锡钻地质装备有限公司 | Tap subassembly for geological exploration |
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