CN111350825A - Mechanical seal formula drill box - Google Patents

Mechanical seal formula drill box Download PDF

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Publication number
CN111350825A
CN111350825A CN202010292121.3A CN202010292121A CN111350825A CN 111350825 A CN111350825 A CN 111350825A CN 202010292121 A CN202010292121 A CN 202010292121A CN 111350825 A CN111350825 A CN 111350825A
Authority
CN
China
Prior art keywords
sealing
rotating shaft
ring
water
shell
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.)
Pending
Application number
CN202010292121.3A
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Chinese (zh)
Inventor
蒲长晏
郭凯
王佳斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Langfang Jinglong Heavy Machinery Co ltd
Original Assignee
Langfang Jinglong Heavy Machinery Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Langfang Jinglong Heavy Machinery Co ltd filed Critical Langfang Jinglong Heavy Machinery Co ltd
Priority to CN202010292121.3A priority Critical patent/CN111350825A/en
Publication of CN111350825A publication Critical patent/CN111350825A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3404—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/003—Bearing, sealing, lubricating details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3436—Pressing means
    • F16J15/3452—Pressing means the pressing force resulting from the action of a spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3496—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member use of special materials

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

The invention discloses a mechanical sealing type drill box which comprises a box body, a rotating shaft and a shell, wherein the rotating shaft is connected through a bearing, the shell is sleeved on the outer side of the rotating shaft, the shell is fixedly connected with the box body, a water inlet is formed in the shell, a water inlet cavity is formed in the shell, the shell faces towards the inner side of the rotating shaft, and a mechanical sealing mechanism is arranged in the water inlet cavity. The mechanical sealing mechanism comprises a sealing static ring and a sealing movable ring which forms end face sealing with the sealing static ring, and a water through hole corresponding to the radial water hole of the rotating shaft is formed in the sealing movable ring. The sealing movable ring has a spring compensation function. The water-saving device is characterized by further comprising a mandrel arranged inside the rotating shaft, wherein the mandrel comprises a threaded section connected with the rotating shaft and a reducing section communicated with the radial water hole. The end part of the diameter reducing section of the mandrel is provided with a one-way valve. According to the invention, through the improved arrangement of the mechanical sealing mechanism, the traditional sealing ring type seal is modified into the end face mechanical seal, and the independent installation of the bearing and the sealing mechanism is realized, so that the sealing effect is good, the wear resistance is realized, the service life is long, the maintenance is convenient, and the maintenance cost is greatly reduced.

Description

Mechanical seal formula drill box
Technical Field
The invention relates to the technical field of hydraulic anchor rod and anchor cable drill rigs for coal mines, in particular to a mechanical seal type drill box.
Background
At present, most of drilling boxes of the anchor rod and anchor cable drill carriage commonly used in China adopt wet type drilling boxes, the highest rotating speed is 500RPM, the highest water pressure is 20bar, namely, a hollow drilling rod is installed on the drilling box during drilling, high-pressure water needs to enter the tail part of the high-speed rotating drilling rod through the drilling box, and finally the front end of the drilling hole is washed by the high-pressure water, so that the aims of deslagging and dedusting during drilling are fulfilled.
As the drill carriage is frequently used, the drill box works for more than 10 hours every day, the sealing ring in the drill box is damaged or the sealing ring is abraded to the shaft to generate water leakage, so that the water pressure and water quantity are insufficient when the drill carriage punches, and the normal use of the drill carriage is influenced. According to market investigation, the stock anchor rope drill carriage (not including four-arm and six-arm stock drill carriages) for only two-arm coal mine has 1200 drilling boxes, the maximum service life of each drilling box is calculated according to 60 days, about 7200 drilling boxes need to be maintained and replaced every year, and the following problems also exist in the replacement process: (1) if the water leakage is caused by the abrasion of the sealing ring, the sealing ring needs to be replaced when the drill box is maintained, and the rotating shaft, the motor, the bearing, the end cover and other parts need to be disassembled when the sealing ring is replaced, so that the number of the disassembled parts is large, and the maintenance time is long; (2) if the sealing ring has water leakage caused by the groove when the rotating shaft is abraded, the rotating shaft needs to be replaced, so that the maintenance cost and the maintenance time are greatly increased.
It is therefore evident that the above-mentioned conventional drill carriage has disadvantages and drawbacks in structure, method and use, and further improvements are desired. How to establish a new mechanical seal formula drill box, make it adopt novel mechanical seal structure, realize sealed effectual, stand wear and tear, cost of maintenance is low, long service life's purpose, become the current industry and need the modified target greatly.
Disclosure of Invention
The invention aims to solve the technical problem of providing a mechanical seal type drill box, which adopts a novel mechanical seal structure to achieve the purposes of good seal effect, wear resistance, low maintenance cost and long service life, thereby overcoming the defects of the existing drill carriage drill box.
In order to solve the technical problem, the invention provides a mechanical seal type drill box which comprises a box body, a rotating shaft and a shell, wherein the rotating shaft is rotatably arranged on the axial direction of the box body through a bearing;
the mechanical sealing mechanism comprises a sealing static ring and a sealing movable ring which forms end face sealing with the sealing static ring, the sealing static ring is fixedly connected with the inner wall of the water inlet cavity, the sealing movable ring is fixedly connected with the rotating shaft, a water through hole is formed in the sealing movable ring, the water through hole corresponds to a radial water hole in the rotating shaft, and the sealing movable ring is used for conveying high-pressure water entering the water inlet cavity into the rotating shaft.
In a further improvement, the mechanical sealing mechanism comprises two static sealing rings and a movable sealing ring arranged between the two static sealing rings, and the movable sealing ring adopts a movable sealing ring with a spring compensation function.
The sealing device is further improved, and the joint end faces of the sealing static ring and the sealing moving ring are made of high-hardness alloy materials.
In a further improvement, an end cover is fixed between the shell and the box body.
In a further improvement, the inner ring of the end cover is arranged to be a step-shaped structure close to the shell, the step-shaped structure and the inner wall of the shell form the water inlet cavity, and one sealing static ring is fixedly connected with the step-shaped structure.
The improved structure is characterized in that a static ring sealing ring is arranged between the static sealing ring and the inner wall of the water inlet cavity.
In a further improvement, two moving ring sealing rings are arranged between the sealing moving ring and the rotating shaft, and the two moving ring sealing rings are respectively arranged on two sides of the limber hole.
The improved structure is characterized by further comprising a mandrel arranged in the rotating shaft and used for installing the hollow drill rod, wherein the mandrel is arranged in the rotating shaft, the outer part of the mandrel comprises a threaded section movably connected with the inner wall of the rotating shaft and a reducing section communicated with a radial water hole of the rotating shaft, the reducing section is arranged on the end side of the tail part of the hollow drill rod, and then high-pressure water in the water inlet cavity passes through the radial water hole of the rotating shaft and then flows to the tail part of the hollow drill rod along the reducing section of the mandrel and then flows to the front end of the hollow drill rod.
In a further improvement, the end part of the reducing section of the mandrel is also provided with a one-way valve.
Further improved, the opening pressure of the one-way valve is 0.5-1 Bar.
After adopting such design, the invention has at least the following advantages:
1. the mechanical sealing mechanism is arranged between the shell and the rotating shaft, and the sealing movable ring is provided with the water through holes communicated with the radial water holes of the rotating shaft, so that the mechanical sealing mechanism is arranged on the high-pressure water conveying channel, the traditional sealing ring type seal is modified into the end surface mechanical seal, zero abrasion of the rotating shaft and the sealing movable ring is realized, the sealing effect is good, the abrasion is resistant, and the service life of the drilling box is greatly prolonged.
2. The bearing supporting the rotating shaft is arranged in the box body, the mechanical sealing mechanism is arranged in the shell, and the bearing and the sealing mechanism are independently installed, so that if water is leaked due to abrasion of the sealing mechanism, only the sealing mechanism assembly needs to be replaced, parts such as the rotating shaft and the bearing do not need to be integrally disassembled, maintenance time and maintenance cost are greatly saved, and the device is simple and convenient.
3. Through setting up two sealed quiet rings and a sealed rotating ring that has the spring compensation function to and the supplementary sealed effect that combines quiet ring seal circle and rotating ring seal circle, and all adopt the high rigidity alloy material to make with the laminating terminal surface of sealed quiet ring, can further guarantee the inseparable laminating of the faying face of quiet ring, and the improvement greatly of wearability, guarantee good sealed effect and life.
4. Still through set up the dabber in rotation axis inside, set up traditional rotation axis into the component structure, after being convenient for drilling rod and dabber wearing and tearing, can change the dabber alone, and need not the whole change of rotation axis, practice thrift the cost.
5. And the tail part of the mandrel is provided with the one-way valve, and the one-way valve needs to be opened to ensure that a certain amount of water is still stored in a channel between the water inlet of the shell and the one-way valve after an external high-pressure water source is cut off, so that the problem that a mechanical sealing mechanism cannot operate under a water-free working condition is solved, and the mechanical sealing mechanism is remarkably improved in the aspects of wear resistance and adaptability compared with the traditional sealing ring sealing mode.
Drawings
The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description.
Fig. 1 is a schematic sectional view of the structure of a mechanical seal type drill box of the invention.
The water inlet structure comprises a mandrel 1, a rotating shaft 2, a sealing static ring 3, a one-way valve 4, a bearing 5, a box 6, an end cover 7, a shell 8, a sealing movable ring 9, a static ring sealing ring 10, a movable ring sealing ring 11, a water inlet cavity 12, a water through hole 13, a radial water hole 14, a reducing section 15 and a thread section 16.
Detailed Description
Referring to fig. 1, the mechanical seal type drill box of the present embodiment includes a box body 6, a rotating shaft 2 rotatably disposed on the box body 6 in an axial direction through a bearing 5, and a housing 8 disposed on an outer side of the rotating shaft 2, wherein the housing 8 is disposed on a side of the rotating shaft 2 connected to a drill rod, and the housing 8 is fixedly connected to an end portion of the box body 6 through a bolt.
A water inlet is arranged on the shell 8, a water inlet cavity 12 is arranged on the shell 8 towards the inner side of the rotating shaft 2, and a mechanical sealing mechanism is arranged in the water inlet cavity 12.
In this embodiment, the mechanical sealing mechanism includes two stationary sealing rings 3 and a movable sealing ring 9 disposed therein, and two end faces of the movable sealing ring 9 are tightly attached to the two stationary sealing rings 3 to realize end face sealing. The stationary seal ring 3 is fixedly connected with the inner wall of the water inlet cavity 12, and a stationary seal ring 10 is further arranged on the fixed connection surface, so that the stationary seal ring 3 is stationary relative to the shell 8, and the seal between the stationary seal ring and the shell is good.
In this embodiment, the seal rotating ring 9 is fixedly connected to the rotating shaft 2, so that the seal rotating ring 9 rotates at a high speed along with the rotating shaft 2, thereby realizing zero wear between the rotating shaft and the seal rotating ring. The mechanical sealing structure modifies the traditional sealing ring type seal into an end face mechanical seal, has good sealing effect and is wear-resistant, and the service life of the drill box can be greatly prolonged.
In a preferred embodiment, the sealing movable ring 9 has a spring compensation function, so that a good compensation effect can be achieved, and the sealing function of the sealing mechanism is not affected after slight abrasion occurs between the sealing static ring 3 and the sealing movable ring 9.
The sealing moving ring 9 is provided with a water through hole 13, the water through hole 13 corresponds to the radial water hole 14 on the rotating shaft 2, and the high-pressure water entering from the water inlet on the shell 8 enters the inside of the rotating shaft 2 through the water inlet cavity 12, the water through hole 13 and the radial water hole 14.
In order to further ensure sealing, two movable ring sealing rings 11 are also arranged between the sealing movable ring 9 and the rotating shaft 2, and the two movable ring sealing rings 11 are respectively arranged at two sides of the water through hole 13, so that a better water sealing effect is achieved.
Still in order to further improve the wearability of this mechanical seal mechanism, the laminating terminal surface of this sealed quiet ring 3 of this embodiment and this sealed rotating ring 9 all adopts high rigidity alloy material to make, and the wearability reinforcing, life extension.
Referring to fig. 1, an end cap 7 is also secured between the housing 8 and the case 6. The inner ring of the end cover 7 is arranged to be a step-shaped structure close to the shell, the step-shaped structure and the inner wall of the shell form the water inlet cavity 12, one static sealing ring 9 of the two static sealing rings is fixedly connected with the step-shaped structure, and a static sealing ring 10 is also arranged between the static sealing ring 9 and the inner wall of the end cover 7, so that the sealing between the static sealing ring and the end cover is ensured.
In a more preferred embodiment, the mechanically sealed drill box of the present embodiment further comprises a mandrel 1 for mounting a hollow drill rod, which is disposed inside the rotating shaft 2. The outside of this dabber 1 includes the screw thread section 16 with this rotation axis 2 inner wall swing joint, and the reducing section 15 with the radial water hole 14 intercommunication of this rotation axis, this reducing section 15 is located the hollow drill rod afterbody distolateral, then the high pressure water in this intake cavity 12 is through the radial water hole 14 back of this rotation axis 2, along the reducing section 15 flow direction this hollow drill rod afterbody of this dabber 1, flow to this hollow drill rod front end by this hollow drill rod afterbody again, realize the high pressure water washing drilling front end, reach the purpose of row's sediment, dust removal in the drilling process.
In a further improvement, the end part of the reducing section 15 of the mandrel 1 is also provided with a check valve 4. The opening pressure of the one-way valve 4 is 0.5 to 1 Bar. The one-way valve has the advantages that as a certain water pressure is required for opening the one-way valve, a certain amount of water is still stored in a channel between the water inlet of the shell 8 and the one-way valve 4 after the external high-pressure water source is cut off, and the problem that a mechanical sealing mechanism cannot operate under a water-free working condition is solved.
According to the invention, the mechanical sealing mechanism is arranged between the shell and the rotating shaft, the traditional sealing ring type seal is modified into the end face mechanical seal, the improved sealing mode is obviously improved in the aspects of wear resistance and adaptability compared with the traditional sealing mode, the sealing effect is good, the wear resistance is high, and the service life of the drill box is greatly prolonged.
And all set up inside the box through the bearing that will support the rotation axis, set up mechanical seal mechanism inside the casing, realized bearing and sealing mechanism's independent installation, if because the sealing mechanism wearing and tearing lead to leak, then only need change the sealing mechanism subassembly can, need not wholly disassemble parts such as rotation axis and bearing, saved maintenance duration and cost of maintenance greatly, it is simple and convenient, do benefit to the popularization.
Still through setting the rotation axis into components of a whole that can function independently structure, make the drilling rod directly be connected with the dabber, after the dabber is worn and torn, can change alone, can not lead to the whole of rotation axis to scrap, practice thrift the cost greatly.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention in any way, and it will be apparent to those skilled in the art that the above description of the present invention can be applied to various modifications, equivalent variations or modifications without departing from the spirit and scope of the present invention.

Claims (10)

1. A mechanical seal type drill box comprises a box body and a rotating shaft which is rotatably arranged on the axial direction of the box body through a bearing, and is characterized by further comprising a shell which is sleeved on the outer side of the rotating shaft, wherein the shell is arranged on one side of the rotating shaft, which is connected with a drill rod, and the shell is fixedly connected with the end part of the box body, a water inlet is formed in the shell, a water inlet cavity is formed in the shell, which faces the inner side of the rotating shaft, and a mechanical seal mechanism is arranged in the water inlet cavity;
the mechanical sealing mechanism comprises a sealing static ring and a sealing movable ring which forms end face sealing with the sealing static ring, the sealing static ring is fixedly connected with the inner wall of the water inlet cavity, the sealing movable ring is fixedly connected with the rotating shaft, a water through hole is formed in the sealing movable ring, the water through hole corresponds to a radial water hole in the rotating shaft, and the sealing movable ring is used for conveying high-pressure water entering the water inlet cavity into the rotating shaft.
2. The mechanically sealed drill box of claim 1, wherein said mechanical seal mechanism comprises two stationary seal rings and one movable seal ring disposed between said two stationary seal rings, said movable seal ring being a movable seal ring with spring compensation.
3. The mechanically sealed drill box of claim 2, wherein the joint end faces of the static seal ring and the dynamic seal ring are made of high-hardness alloy materials.
4. The hermetically sealed drill box of claim 3, further comprising an end cap secured between the housing and the box.
5. The mechanically sealed drill box of claim 4, wherein the inner ring of the end cap is disposed against the housing to form a stepped configuration, the stepped configuration forming the water inlet chamber with the inner wall of the housing, and wherein one of the stationary seal rings is fixedly connected to the stepped configuration.
6. The mechanically sealed drill box of claim 5, wherein a stationary ring seal is disposed between said stationary seal ring and an inner wall of said water inlet chamber.
7. The mechanically sealed drill box of claim 6, wherein two dynamic ring seals are disposed between said sealing dynamic ring and said rotating shaft, said two dynamic ring seals being disposed on either side of said water passage hole.
8. The mechanically sealed drill box according to any one of claims 1 to 7, further comprising a mandrel disposed inside the rotating shaft for mounting the hollow drill rod, wherein the mandrel comprises a threaded section movably connected to the inner wall of the rotating shaft and a reduced diameter section communicated with the radial water hole of the rotating shaft, the reduced diameter section is located at the end side of the tail of the hollow drill rod, and the high-pressure water in the water inlet cavity flows to the tail of the hollow drill rod along the reduced diameter section of the mandrel after passing through the radial water hole of the rotating shaft, and then flows to the front end of the hollow drill rod from the tail of the hollow drill rod.
9. The mechanically sealed drill box of claim 8, wherein the reduced diameter section end of the mandrel is further provided with a one-way valve.
10. The mechanically sealed drill box of claim 9, wherein the check valve has an opening pressure of 0.5 Bar to 1 Bar.
CN202010292121.3A 2020-04-14 2020-04-14 Mechanical seal formula drill box Pending CN111350825A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010292121.3A CN111350825A (en) 2020-04-14 2020-04-14 Mechanical seal formula drill box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010292121.3A CN111350825A (en) 2020-04-14 2020-04-14 Mechanical seal formula drill box

Publications (1)

Publication Number Publication Date
CN111350825A true CN111350825A (en) 2020-06-30

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ID=71194935

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010292121.3A Pending CN111350825A (en) 2020-04-14 2020-04-14 Mechanical seal formula drill box

Country Status (1)

Country Link
CN (1) CN111350825A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112228564A (en) * 2020-11-06 2021-01-15 神木市金承机械科技有限公司 Wet-type drilling rotation mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112228564A (en) * 2020-11-06 2021-01-15 神木市金承机械科技有限公司 Wet-type drilling rotation mechanism

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Address after: 065000 Dachang Chaobaihe Industrial Zone, Langfang City, Hebei Province

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Address before: 065000 Dachang Chaobaihe Industrial Zone, Langfang City, Hebei Province

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