WO2017219613A1 - 一种节水增效水力截齿 - Google Patents

一种节水增效水力截齿 Download PDF

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Publication number
WO2017219613A1
WO2017219613A1 PCT/CN2016/108859 CN2016108859W WO2017219613A1 WO 2017219613 A1 WO2017219613 A1 WO 2017219613A1 CN 2016108859 W CN2016108859 W CN 2016108859W WO 2017219613 A1 WO2017219613 A1 WO 2017219613A1
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WIPO (PCT)
Prior art keywords
pick
water
conical surface
tooth
flange sleeve
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Ceased
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PCT/CN2016/108859
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English (en)
French (fr)
Inventor
刘送永
崔新霞
江红祥
李伟
沈刚
唐玮
段新奇
李洪盛
吴洪状
韩玉辉
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China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
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China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
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Publication of WO2017219613A1 publication Critical patent/WO2017219613A1/zh
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
    • E21C25/60—Slitting by jets of water or other liquid
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/187—Mining picks; Holders therefor with arrangement of fluid-spraying nozzles
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves

Definitions

  • the invention relates to a water-saving and synergistic hydraulic pick, which is a water-saving and synergistic hydraulic pick suitable for a high-pressure water jet shearer, a roadheader and a rock drill.
  • the crack the energy loss is large, can not meet the high efficiency and low consumption crushing requirements and the best dust reduction effect, and the jet flow in the downhole is difficult to control, and it is easy to form a flood at the working surface, which affects the efficiency of the working face.
  • the object of the present invention is to provide a water-saving and synergistic hydraulic pick capable of controlling water flow, improving the efficiency of crushing hard rock, and having a good dust-reducing effect, in view of the problems existing in the prior art.
  • the water-saving and synergistic hydraulic pick of the present invention comprises a toothed seat with a stepped hole, and a leakage hole is opened in the center of the bottom of the toothed seat, and a side of the toothed seat is opened in the radial direction with a high-pressure water flowing in contact with the stepped hole.
  • the water hole and the stepped hole of the tooth seat are inserted into the tooth body.
  • the tooth body is adjacent to the outer end surface of the toothed seat and has an annular groove communicating with the high pressure water inlet hole.
  • the annular groove is provided with a radial water channel, the tooth body
  • the front part is axially opened with a central water channel communicating with the radial water channel, and an alloy tooth tip nozzle is arranged at the center water channel outlet at the front end of the tooth body, and the tail end surface of the tooth body is gap-fitted with the bottom surface of the tooth holder, and the outer end surface of the tooth holder
  • the inner cavity is provided with a flange sleeve matched with the tooth body;
  • the inner hole of the flange sleeve is chamfered into a small taper inner conical surface, and the chamfer of the annular groove of the tooth body opposite to the inner hole chamfer of the inner end of the flange sleeve is a small taper outer conical surface,
  • the inner side of the small taper outer conical surface is provided with a step matching the shoulder of the high pressure water inlet hole;
  • the tooth body moves to the left until the small taper inner conical surface cooperates with the small taper outer conical surface, the high pressure water enters from the high pressure water inlet hole, and changes into the medium and low pressure through the matching gap between the small taper inner conical surface and the small taper outer conical surface.
  • the water flows into the annular groove, and then flows through the radial water channel and the central flow channel in sequence, and finally is ejected from the injection hole of the alloy nozzle body;
  • the tooth body moves to the right until the end of the tooth body abuts against the bottom of the tooth cavity, the distance between the small taper inner conical surface and the small taper outer conical surface is enlarged, and the high pressure water enters the high pressure water inlet hole and flows through the small taper inner conical surface. Between the small tapered outer conical surface and the annular groove, the radial water channel and the central flow channel are sequentially flowed through, and finally, the nozzle hole of the alloy nozzle body is ejected.
  • the small taper inner conical surface is consistent with the small taper outer conical surface taper, and the small taper inner conical surface defines the movement range of the tooth body. Wai.
  • the outer end of the flange sleeve is provided with a dustproof sealing groove, and the dustproof sealing groove is provided with a dustproof sealing ring matched with the tooth body.
  • the flange sleeve and the tooth holder are connected by a hexagon socket bolt.
  • a copper sealing ring is arranged on the end face of the flange sleeve and the tooth holder.
  • the mating surface of the outer circumferential surface of the tooth body and the inner hole of the tooth holder is provided with a grid ring; the outer circular surface of the tooth body and the inner surface of the flange sleeve are provided with a grid ring.
  • the outer circular surface of the inner end of the flange sleeve is matched with the inner inner hole of the toothed seat, and the inner hole of the flange sleeve is matched with the outer circle of the middle portion of the tooth body.
  • the radial water channel has at least one.
  • the small-flow injection can be carried out continuously when the pick is empty, which greatly reduces the waste of water resources and energy, avoids flooding on the working surface, and solves the problem of time lag of high-pressure water spray and easy blockage of the nozzle;
  • the grid seal is used to reduce the friction and improve the sealing performance.
  • the dust seal ring is installed to prevent dust from entering the inside of the pick and improve the service life;
  • the shape of the pick is the same as that of the common pick. It is directly installed on the existing mining machinery and has wide applicability.
  • FIG. 1 is a structural diagram showing the state of opening of a high-pressure waterway of a water-saving and synergistic hydraulic pick according to the present invention
  • FIG. 2 is a structural diagram showing the closed state of the water-saving and synergistic hydraulic pick high pressure water passage of the present invention
  • Figure 3 is a partially enlarged structural view of the valve port in the open state of the water-saving synergistic hydraulic pick high pressure water channel of the present invention
  • Figure 4 is a partially enlarged structural view of the valve port in the closed state of the water-saving synergistic hydraulic pick high pressure water passage of the present invention.
  • the water-saving synergistic hydraulic pick of the present invention is mainly composed of an alloy tip nozzle 1, a tooth body 2, a flange sleeve 5, and a tooth holder 8.
  • the toothed seat 8 is provided with a stepped hole, and the bottom of the bottom of the toothed seat 8 is provided with a leaking hole 11 through which the water leaking into the cavity formed by the trailing end of the tooth body and the toothed seat can be smoothly discharged, so as to avoid Affect the performance of the pick.
  • a side surface of the tooth holder 8 is provided with a high-pressure water inlet hole 13 communicating with the stepped hole in the radial direction.
  • the stepped hole of the tooth holder 8 is inserted into the tooth body 2, and the tooth body 2 is adjacent to the outer end surface of the tooth holder 8.
  • An annular groove 12 is formed in a position in which the high-pressure water inlet hole 13 is misaligned.
  • the annular groove 12 is provided with at least one radial water channel 10, and the front portion of the tooth body 2 is axially opened with a central water channel communicating with the radial water channel 10. 3.
  • the alloy tip nozzle 1 is disposed at the center waterway outlet of the front end of the tooth body 2.
  • the tail end surface of the tooth body 2 is in clearance with the bottom surface of the tooth holder 8, and the outer cavity of the tooth holder 8 is provided with the tooth body 2
  • the flange sleeve 5 is matched; the outer surface of the end of the tooth body 2 and the inner surface of the toothed seat 8 are provided with a grid ring 9; the outer circular surface of the tooth body 2 is matched with the inner hole of the flange sleeve 5 There is a grid ring 9 on the surface.
  • the alloy tip nozzle 1 and the tooth body 2 are respectively provided with mutually communicating nozzle holes and a central water channel 3 in the axial direction, and a radial water channel 10 is opened at the bottom of the annular groove 12 on the left side of the outer conical surface 15 of the tooth body 2, the tooth body 2
  • the radial water channel 10 is electrically connected to the central water channel 3, and the tooth holder 8 is provided with a high-pressure water inlet hole 13 in the radial direction.
  • the outer circular surface of the inner end of the flange sleeve 5 is matched with the inner hole of the inner side of the toothed seat 8, and the inner hole of the flange sleeve 5 is matched with the outer circle of the middle portion of the tooth body 2; the outer end of the flange sleeve 5 is provided with a dustproof sealing groove.
  • the dustproof sealing groove is provided with a dustproof sealing ring 4 matched with the tooth body 2; the flange sleeve 5 and the toothed seat 8 are connected by a hexagon socket bolt; the flange sleeve 5 and the tooth holder 8 are provided with a copper seal on the end surface thereof.
  • the outer ring of the right side of the flange sleeve 5 and the inner hole of the left side of the toothed seat 8 cooperate with each other to locate the center of the flange sleeve 5, the inner hole of the flange sleeve 5 is matched with the outer circle of the middle portion of the tooth body 2, and the gap is sealed by the grid ring 9;
  • the self-control of the water flow is realized by the degree of cooperation between the inner conical surface 14 of the right side of the flange sleeve 5 and the outer conical surface 15 of the middle portion of the tooth body 2;
  • the inner hole of the flange sleeve 5 is chamfered into a small taper inner conical surface 14, and the chamfer of the annular groove 12 of the tooth body 2 and the inner side of the inner end of the flange sleeve 5 is chamfered by a small taper.
  • a conical surface 15, the inner side of the small taper outer conical surface 15 is provided with a step 16 which coincides with the orifice shoulder of the high-pressure water inlet hole 13; the high-pressure water acts on the step 16 to provide power for the automatic closing of the pick;
  • the small taper inner conical surface 14 conforms to the taper of the small taper outer conical surface 15, and the small taper inner conical surface 14 defines the range of movement of the tooth body 2.
  • the tail portion of the tooth body 2 has three axially acting surfaces in the inner hole of the toothed seat 8 subjected to high pressure water.
  • the three high pressure water acting sections are respectively: two sides in the annular groove 12, and a step The right side of the 16th.
  • the tooth body 2 is moved to the right by the cutting resistance until the tail of the tooth body 2 is in contact with the bottom of the inner hole of the tooth holder 8, and the outer cone on the tooth body 2 at this time
  • the distance between the face 15 and the inner conical surface 14 on the flange sleeve 5 increases and the high pressure water passage opens. Since the flow passages of the picks are filled with low-pressure water, as soon as the high-pressure water passage is opened, the flow rate of the high-pressure water through the radial water passage 10 of the tooth body to the central flow passage 3 is rapidly increased, and the water jet velocity is increased, and the impact kinetic energy is increased.
  • the cubic relationship increases rapidly, and the high-pressure water signal is transmitted to the tip nozzle body 1 through the fluid in a timely and accurate manner, so as to ensure that the high-pressure water and the pick force are close to being synchronized. And when the high pressure water passage is completely opened, the right end surface of the tooth body 2 is in contact with the bottom of the inner hole of the tooth holder 8, thereby ensuring the stability of the cutting of the pick.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)

Abstract

一种节水增效水力截齿，适用于高压水射流采煤机、掘进机和凿岩机，截齿包括齿身（2），齿身（2）前端的中心水道（3）出口处设有合金齿尖喷咀（1），齿身（2）尾端外圆与齿座（8）内右部内孔间隙配合，齿座（8）左部内孔设有法兰套（5），法兰套（5）右侧外圆与齿座（8）左侧内孔过渡配合，通过法兰套（5）与齿座（8）连接，法兰套（5）内孔与齿身（2）中部间隙配合，法兰套（5）右端锥面与齿身（2）中部锥面锥度一致；合金齿尖喷咀（1）沿轴向设有喷孔，齿身（2）沿轴向设有中心水道（3），喷孔和中心水道（3）相互导通，齿身（2）中部有与中心水道（3）连通的径向水道（10），齿身（2）在小锥度外圆锥面（15）左侧设有连通齿身（2）各径向水道（10）的环形凹槽（12），齿座（8）沿径向开设有高压水进水孔（13），可实现高压水流量自控，截割硬岩可增加破岩效率，降低截齿磨损，提高灭尘效果；空载时可切换为低压水，降低水流量，节约水资源。

Description

一种节水增效水力截齿 技术领域
本发明涉及一种节水增效水力截齿，是一种适用于高压水射流采煤机、掘进机、凿岩机的节水增效水力截齿。
背景技术
目前，单纯依靠机械截齿破岩，无法截割硬岩，且掘进机工作时截齿温度高，磨损快，破岩时粉尘量大，存在安全隐患。采用高压水射流辅助机械截齿破碎硬岩，是行之有效的方法之一。但是现有高压水射流辅助破岩技术中，采用的喷咀与截齿分开布置，由于受采掘机械截齿安装位置、喷嘴靶距、压力等因素影响，高压水射流不能有效作用于截齿破碎的裂纹，能量损耗大，不能满足高效低耗破碎要求及最佳降尘效果，并且在井下射流流量难以控制，易在工作面处形成水患，影响工作面效率。
发明内容
技术问题：本发明的目的是针对已有技术中存在的问题，提供一种能够控制水流量，提高破碎硬岩效率，且降尘效果较好的节水增效水力截齿。
技术问题：本发明的节水增效水力截齿，包括开有阶梯孔的齿座，齿座的底部中央开有泄漏孔，齿座一侧面沿径向开设有与阶梯孔相通的高压水进水孔，齿座阶梯孔内插装有齿身所述齿身临近齿座外端面处开有与高压水进水孔错位相通的环形凹槽，环形凹槽内开有径向水道，齿身前部沿轴向开有与径向水道相通的中心水道，齿身前端的中心水道出口处设有合金齿尖喷咀，齿身的尾部端面与齿座底面间隙配合，所述齿座外端面内腔设有与齿身相配合的法兰套；
所述法兰套内侧端内孔倒角为小锥度内圆锥面，所述齿身的环形凹槽与法兰套内侧端内孔倒角相对一面的倒角为小锥度外圆锥面，所述小锥度外圆锥面的内侧设有与高压水进水孔孔口台肩相吻合的台阶；
当齿身向左移动直至小锥度内圆锥面与小锥度外圆锥面配合时，高压水从高压水进水孔进入、经小锥度内圆锥面和小锥度外圆锥面的配合间隙转变为中低压水流至环形凹槽内，再依次流过径向水道、中心流道，最后由合金喷咀体的喷孔喷出；
当齿身向右移动直至齿身尾端抵于齿座内腔底部时，小锥度内圆锥面和小锥度外圆锥面的间距扩大，高压水进入高压进水孔，流经小锥度内圆锥面和小锥度外圆锥面之间至环形凹槽内，再依次流过径向水道、中心流道，最后由合金喷咀体的喷孔喷出。
所述的小锥度内圆锥面与小锥度外圆锥面锥度一致，小锥度内圆锥面限定齿身的移动范 围。
所述的法兰套外侧端设有防尘密封槽，防尘密封槽内设有与齿身相配合的防尘密封圈。
所述的法兰套与齿座由内六角螺栓连接。
所述法兰套与齿座配合端面上设有紫铜密封圈。
所述的齿身尾端外圆面与齿座内孔的配合面上设有格来圈；齿身中部外圆面与法兰套内孔配合面上设有格来圈。
所述法兰套内侧端外圆面与齿座内侧内孔过渡配合，法兰套内孔与齿身中部外圆间隙配合。
所述径向水道至少有一条。
有益效果：由于采用了上述技术方案，本发明与现有技术相比具有以下优点：
(1)采用锥面阀口结构，自控动态性能更好；
(2)截齿空载时可持续进行小流量喷射，极大地减少水资源及能量的浪费，避免工作面发生水患，同时解决了高压水喷出时间滞后以及喷咀易堵塞的问题；
(3)采用新型法兰套结构，缩短齿身长度，减小截齿座所受弯矩；
(4)采用法兰连接装配形式，便于截齿的拆装，提高零部件的可互换性；
(5)采用格来圈密封减小摩擦力，提高密封性能，装设防尘密封圈，避免截齿内部进入灰尘，提高使用寿命；
(6)截齿外形与普通截齿一样，在现有采掘机械上直接安装，具有广泛的适用性。
附图说明
图1是本发明的节水增效水力截齿高压水道开启状态结构图；
图2是本发明的节水增效水力截齿高压水道关闭状态结构图；
图3是本发明的节水增效水力截齿高压水道开启状态下阀口局部放大结构图；
图4是本发明的节水增效水力截齿高压水道关闭状态下阀口局部放大结构图。
图中：1－合金齿尖喷咀；2－齿身；3－中心水道；4－防尘密封圈；5－法兰套；6－内六角螺栓；7－紫铜密封圈；8－截齿座；9－格来圈；10－径向流道；11－泄漏孔；12－环形凹槽；13－高压水进水孔；14－小锥度内圆锥面；15－小锥度外圆锥面；16－台阶。
具体实施方式
下面结合附图中的实施例对本发明作进一步的描述：
如图1至3所示，本发明的节水增效水力截齿，主要由合金齿尖喷咀1、齿身2、法兰套5和齿座8构成。所述的齿座8上开有阶梯孔，齿座8的底部中央开有泄漏孔11，通过泄漏孔11可以将泄漏至齿身尾端与齿座构成的空腔内的水顺利排出，以免影响截齿的工作性能。 所述齿座8的一侧面沿径向开设有与阶梯孔相通的高压水进水孔13，齿座8阶梯孔内插装有齿身2，所述齿身2临近齿座8外端面处开有与高压水进水孔13错位相通的环形凹槽12，环形凹槽12内开有至少一条径向水道10，齿身2前部沿轴向开有与径向水道10相通的中心水道3，齿身2前端的中心水道出口处设有合金齿尖喷咀1，齿身2的尾部端面与齿座8底面间隙配合，所述齿座8外端面内腔设有与齿身2相配合的法兰套5；所述的齿身2尾端外圆面与齿座8内孔的配合面上设有格来圈9；齿身2中部外圆面与法兰套5内孔配合面上设有格来圈9。合金齿尖喷咀1和齿身2沿轴向分别开设有相互导通的喷孔和中心水道3，齿身2外圆锥面15左侧的环形凹槽12底部开设径向水道10，齿身2径向水道10与中心水道3相导通，齿座8沿径向开设有高压水进水孔13。
所述法兰套5内侧端外圆面与齿座8内侧内孔过渡配合，法兰套5内孔与齿身2中部外圆间隙配合；法兰套5的外侧端设有防尘密封槽，防尘密封槽内设有与齿身2相配合的防尘密封圈4；法兰套5与齿座8由内六角螺栓连接；法兰套5与齿座8配合端面上设有紫铜密封圈7。法兰套5右侧外圆与齿座8左侧内孔过渡配合以定位法兰套5中心，法兰套5内孔与齿身2中部外圆间隙配合，间隙用格来圈密封9；利用法兰套5右侧内圆锥面14与齿身2中部的外圆锥面15之间的配合程度来实现水流量的自控；
所述法兰套5内侧端内孔倒角为小锥度内圆锥面14，所述齿身2的环形凹槽12与法兰套5内侧端内孔倒角相对一面的倒角为小锥度外圆锥面15，所述小锥度外圆锥面15的内侧设有与高压水进水孔13孔口台肩相吻合的台阶16；高压水作用于台阶16上为截齿的自动关闭提供动力；所述的小锥度内圆锥面14与小锥度外圆锥面15锥度一致，小锥度内圆锥面14限定齿身2的移动范围。
当齿身2向左移动直至小锥度内圆锥面14与小锥度外圆锥面15配合时，高压水从高压水进水孔13进入、经小锥度内圆锥面14和小锥度外圆锥面15的配合间隙转变为中低压水流至环形凹槽12内，再依次流过径向水道10、中心流道3，最后由合金喷咀体1的喷孔喷出；
当齿身2向右移动直至齿身2尾端抵于齿座8内腔底部时，小锥度内圆锥面14和小锥度外圆锥面15的间距扩大，高压水进入高压进水孔13，流经小锥度内圆锥面14和小锥度外圆锥面15之间至环形凹槽12内，再依次流过径向水道10、中心流道3，最后由合金喷咀体1的喷孔喷出。
工作原理：
如图1所示，齿身2尾部在齿座8内孔主要有三个作用面受到高压水的轴向压力，这三个高压水作用截面分别为：环形凹槽12内的两侧面，以及台阶16的右侧面。当高压水经高压水进水孔13进入从齿座8内孔后，由于高压水作用在环形凹槽12内的两侧面上的力相互 抵消，所以齿身2所受高压水整体作用力为高压水作用在台阶16右侧面上的力，该力使得齿身2向左移动，直至外圆锥面15与内圆锥面14接触。如图4所示，此时齿身2与法兰套5之间只有非均匀间隙，高压水进水孔13和齿身环形凹槽12被非均匀间隙阻隔，高压水经过非均匀间隙转变为低压水经各流道由喷嘴喷出。合金齿尖喷咀1时刻保持喷出稳定的低压水，如果粉尘进入齿尖喷咀体1的喷孔并将喷孔堵塞，这时截齿内低压水立刻由于停止流动变为高压水，将粉尘喷出后，恢复为低压水。
如图3所示，当截齿截割硬岩时，齿身2受截割阻力作用向右移动，直至齿身2尾部与齿座8内孔底部接触，此时齿身2上的外圆锥面15与法兰套5上的内圆锥面14之间的距离增大，高压水通道打开。由于截齿各处流道已充满低压水，高压水通道一打开，高压水通过齿身径向水道10至中心流道3的水射流流量迅速增大，进而水射流速度升高，冲击动能以三次方关系迅速增大，高压水信号及时、准确通过流体传递到齿尖喷咀体1，保证喷出高压水与截齿受力接近同步。并且当高压水通道完全打开时，齿身2右端面与齿座8内孔底部接触，保证截齿截割时的稳定性。
如图4所示，当截齿破碎硬岩后，截齿脱离破碎岩石而处于空载状态，由于齿身2所受高压水作用使得齿身2向左移动，齿身2的外圆锥面15与法兰套5上的内圆锥面14之间形成极小的非均匀间隙将高压水转变为低压水由喷嘴喷出，最大限度地减少无用射流流量消耗，防止工作面发生水患。

Claims (8)

  1. 一种节水增效水力截齿，其特征在于：它包括开有阶梯孔的齿座(8)，齿座(8)的底部中央开有泄漏孔(11)，齿座(8)一侧面沿径向开设有与阶梯孔相通的高压水进水孔(13)，齿座(8)阶梯孔内插装有齿身(2)，所述齿身(2)临近齿座(8)外端面处开有与高压水进水孔(13)错位相通的环形凹槽(12)，环形凹槽(12)内开有径向水道(10)，齿身(2)前部沿轴向开有与径向水道(10)相通的中心水道(3)，齿身(2)前端的中心水道出口处设有合金齿尖喷咀(1)，齿身(2)的尾部端面与齿座(8)底面间隙配合，所述齿座(8)外端面内腔设有与齿身(2)相配合的法兰套(5)；
    所述法兰套(5)内侧端内孔倒角为小锥度内圆锥面(14)，所述齿身(2)的环形凹槽(12)与法兰套(5)内侧端内孔倒角相对一面的倒角为小锥度外圆锥面(15)，所述小锥度外圆锥面(15)的内侧设有与高压水进水孔(13)孔口台肩相吻合的台阶(16)；
    当齿身(2)向左移动直至小锥度内圆锥面(14)与小锥度外圆锥面(15)配合时，高压水从高压水进水孔(13)进入、经小锥度内圆锥面(14)和小锥度外圆锥面(15)的配合间隙转变为中低压水流至环形凹槽(12)内，再依次流过径向水道(10)、中心流道(3)，最后由合金喷咀体(1)的喷孔喷出；
    当齿身(2)向右移动直至齿身(2)尾端抵于齿座(8)内腔底部时，小锥度内圆锥面(14)和小锥度外圆锥面(15)的间距扩大，高压水进入高压进水孔(13)，流经小锥度内圆锥面(14)和小锥度外圆锥面(15)之间至环形凹槽(12)内，再依次流过径向水道(10)、中心流道(3)，最后由合金喷咀体(1)的喷孔喷出。
  2. 根据权利要求1所述的节水增效水力截齿，其特征在于：所述的小锥度内圆锥面(14)与小锥度外圆锥面(15)锥度一致，小锥度内圆锥面(14)限定齿身(2)的移动范围。
  3. 根据权利要求1所述的一种新型节水增效水力截齿，其特征在于：所述的法兰套(5)外侧端设有防尘密封槽，防尘密封槽内设有与齿身(2)相配合的防尘密封圈(4)。
  4. 根据权利要求1或3所述的一种新型节水增效水力截齿，其特征在于：所述的法兰套(5)与齿座(8)由内六角螺栓连接。
  5. 根据权利要求1或3所述的节水增效水力截齿，其特征在于：所述法兰套(5)与齿座(8)配合端面上设有紫铜密封圈(7)。
  6. 根据权利要求1所述的节水增效水力截齿，其特征在于：所述的齿身(2)尾端外圆面与齿座(8)内孔的配合面上设有格来圈(9)；齿身(2)中部外圆面与法兰套(5)内孔配合面上设有格来圈(9)。
  7. 根据权利要求1所述的节水增效水力截齿，其特征在于：所述法兰套(5)内侧端外圆面与齿座(8)内侧内孔过渡配合，法兰套(5)内孔与齿身(2)中部外圆间隙配合。
  8. 根据权利要求1所述的节水增效水力截齿，其特征在于：所述径向水道(10)至少有一条。
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CN114151082A (zh) * 2021-10-27 2022-03-08 中国矿业大学 一种自动高压射流辅助破岩及泡沫灭尘截齿装置
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