CN108468941A - A kind of multiple exit oil and gas distributor - Google Patents
A kind of multiple exit oil and gas distributor Download PDFInfo
- Publication number
- CN108468941A CN108468941A CN201810367104.4A CN201810367104A CN108468941A CN 108468941 A CN108468941 A CN 108468941A CN 201810367104 A CN201810367104 A CN 201810367104A CN 108468941 A CN108468941 A CN 108468941A
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- China
- Prior art keywords
- oil
- spool
- oil gas
- gas
- tap hole
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- 238000009826 distribution Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 abstract description 10
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 157
- 239000012530 fluid Substances 0.000 description 6
- 230000001050 lubricating effect Effects 0.000 description 6
- 239000012071 phase Substances 0.000 description 4
- 229910052770 Uranium Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910052740 iodine Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000012208 gear oil Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- F16N—LUBRICATING
- F16N25/00—Distributing equipment with or without proportioning devices
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The invention discloses a kind of multiple exit oil and gas distributors, it includes first guide block, valve body and spool, the valve body is equipped with and the matched valve opening of spool, one end of the valve opening is sealed by silk plug, the other end is blocked by first guide block and is connected to oil-gas pipeline by the jet gun hole in first guide block, multiple oil gas vents along its axial alignment are equipped on the hole wall of valve opening, the spool is located in the valve opening of valve body, position corresponding with each oil gas vent of valve body is equipped on the cylinder of spool matches oil gas groove with the coaxial ring-type of spool, the end face of the direction elder generation guide block of spool is equipped with and each tap hole communicated with oil gas groove.The present invention is using the tap hole conveying oil gas in spool, it can be achieved that the impartial distribution of oil gas, is greatly expanded the application field of oil-air lubrication.The device not only makes the thousands of oil sites of set of system lubrication become a reality, and the moving components quantity such as stepwise type distributor in system is decreased, to improve the reliability of system operation.
Description
Technical field
The present invention relates to a kind of oil-gas distributing devices used in mechanical equipment oil gas lubricating system, it can be achieved that multiple exit
Oil gas evenly distributes, and belongs to the lubrication technical field of machine.
Background technology
Oil-air lubrication（Gas-liquid two-phase fluid cooling and lubricating）A kind of novel lubrication technology, it using Air-oil mixing film every
The rubbing surface of relative motion is opened, can not only play lubricating action, while the higher gas stream of speed can also be taken away and largely rub
Chafing is played the role of cooling.Oil gas lubricating system has adapted to the newest hair of mechanical industry equipment with its distinctive superiority
Exhibition needs, and is more and more widely used, but there are a great problems in terms of the distribution of gas stream：As a kind of typical case
Gas-liquid two-phase fluid, gas stream is very different in terms of physical characteristic with other monophasic fluids, it had both been different from simple
Gaseous fluid such as compressed air can be by " Coanda " in assigning process also different from simple liquid phase fluid such as gear oil
The influence of effect, so that the uniform or proportional assignment of gas stream cannot achieve.So the oil gas lubricating system of early stage is only
Can use the method for salary distribution of " point-to-point ", i.e. the distribution of lubricants capacity be by the distribution to liquid phase or semi-solid phase lubricant rather than
It carries out, i.e., is carried out by using the device such as piston (cylinder) for thering is fixed volume to exchange by the distribution of oil-gas two-phase flow, this
Mean that each oil site there are one corresponding piston, oil site up to thousands of or thousands of occasions (such as
Metallurgical continuous casting), thousands of or thousands of a pistons must be configured in lubricating system, and the use of a large amount of pistons will certainly reduce system
Reliability of operation, because a large amount of piston means a large amount of moving component while also implying that considerable consumption, and it is progressive
Formula distributor and oil-gas mixer integrate be arranged in high temperature and by water or other there is chemical hazard fluid erosion to be disliked
In bad environment, valve member is easy to be damaged, and affects the lubrication of mechanical equipment.
Invention content
It is an object of the invention to be directed to the drawback of the prior art, a kind of multiple exit oil and gas distributor is provided, is ensureing oil
While gas evenly distributes, the reliability of system operation is improved.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of multiple exit oil and gas distributor, composition include first guide block, valve body and columned spool, the valve body be equipped with
The matched valve opening of spool, one end of the valve opening are sealed by silk plug, and the other end is blocked by first guide block and by penetrating in first guide block
Stream rifle hole is connected to oil-gas pipeline, and multiple oil gas vents along its axial alignment, spool position are equipped on the hole wall of valve opening
In in the valve opening of valve body, position corresponding with each oil gas vent of valve body is equipped with coaxial with spool on the cylinder of spool
Ring-type match oil gas groove, the end face of the direction elder generation guide block of spool is equipped with and each tap hole communicated with oil gas groove.
Above-mentioned multiple exit oil and gas distributor, it is described elder generation guide block in jet gun hole one end corresponding with spool be extended to cone
The oil gas mixed flow chamber of shape, the other end are equipped with the oil and gas import to match with oil-gas pipeline, the spool end opposite with first guide block
Middle face is equipped with hemispheric mixed flow ball, and the tap hole on the end face is uniformly distributed around mixed flow ball.
The end face of above-mentioned multiple exit oil and gas distributor, the spool is multigroup to each tap hole setting with oil gas groove,
The quantity of each group tap hole is identical, every group of correspondence one matches oil gas groove, and each tap hole with oil gas mixed flow chamber by being connected to
Axial tap hole and be formed by connecting with the radial tap hole that oil gas groove is connected to, multiple axial tap holes of every group of tap hole and
Radial tap hole is uniformly distributed around the axis of spool.
Above-mentioned multiple exit oil and gas distributor, spool close to one end of first guide block and it is adjacent with oil gas groove between
Equipped with the sealing ring coaxial with spool, in the annular seal groove on the inside insertion spool cylinder of each sealing ring, outside is pressed in
On the inner wall of valve opening.
Above-mentioned multiple exit oil and gas distributor, the oil gas vent on the valve body are evenly distributed on the both sides of spool.
The present invention is using the tap hole conveying oil gas in spool, it can be achieved that the impartial distribution of oil gas, is greatly expanded oil
The application field of gas lubrication.The device not only makes the thousands of oil sites of set of system lubrication become a reality, and decreases in system
The moving components quantity such as stepwise type distributor (piston), to improve the reliability of system operation.
Description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram of spool；
Fig. 3 is the A direction views of spool in Fig. 2.
In figure respectively marked as：1, first guide block, 2, sealing ring, the 3, second oil gas vent, 4, spool, the 5, the 4th oil gas vent,
6, the 6th oil gas vent, 7, valve body, 8, silk plug, the 9, the 5th oil gas vent, 10, third oil gas vent, the 11, first oil gas vent,
12, oil gas mixed flow chamber, 13, oil and gas import, 14, jet gun hole, 15, axial tap hole, 16, mixed flow ball, 17, shunting interface, 18,
First matches oil gas groove, and 19, second matches oil gas groove, 20, seal groove, 21, third match oil gas groove, the 22, the 4th is recessed with oil gas
Slot, the 23, the 5th matches oil gas groove, and the 24, the 6th matches oil gas groove, and 25, radial tap hole.
Specific implementation mode
The present invention provides a kind of impartial distribution of achievable oil gas, the needs that disclosure satisfy that hundreds and thousands of a oil sites,
Stepwise type distributor and oil-gas mixer can be made to be arranged in the multiple exit oil and gas distributor of the lubrication station far from scene.
Referring to Fig. 1~Fig. 3, the present invention includes that first guide block 1, spool 4 and valve body 7, first guide block 1 are oil gas before shunting
Pretreatment unit is equipped with oil and gas import 13, jet gun hole 14, oil gas mixed flow chamber 12.Spool 4 is the important component of oil gas shunting,
There are several grooves on spool 4, there are two types of grooves, matches oil gas groove one is wider, with being machined in oil gas groove
Several radial direction tap holes 25 pool together and the oil gas that several radial tap holes 25 flow through by valve body 7 with oil gas groove
Corresponding oil gas mouth outflow.One is comparing to hold narrow seal groove, seal groove is for installing sealing ring 2, with 7 inner surface of valve body
Shunting interface 17 is named in the end face of sealing, 4 face oil gas mixed flow chamber 12 of spool other than the mixed flow ball 16 of middle, on shunting circle
17 circumferencial direction of face is evenly equipped with several axial tap holes 15, and the oil and gas distributor of N number of number outlet will be all axial directions point
Discharge orifice 15 is divided into N groups, and axial tap hole 15 there are two each group or more, the axial tap hole 15 selected by each group is dividing
It is symmetrically spaced apart on stream interface, more, each group of the axial tap hole more than 15 that axial tap hole 15 is processed, oil
What qi leel was matched will be more uniform, and each group of axial direction tap hole 15 is identical in the axial depth of spool 4, the oil gas of N number of number outlet
Just have on the spool 4 of distributor N number of number match oil gas groove, and with it is corresponding match oil gas groove on 25 phase of radial tap hole
It is logical.It is machined with oil gas vent on valve body 7, and is communicated with oil gas groove with corresponding.
The present invention will be further described by taking six outlet oil and gas distributors as an example below in conjunction with the accompanying drawings
First guide block 1 is pressed on spool 4 in valve body 7 when installing, and plays the role of fixed spool 4.1 right end of first guide block and spool 4
Relatively, left end is connected with oil-gas pipeline, and oil gas is come in from oil and gas import 13, is accelerated to cyclic annular gas stream by jet gun hole 14,
The oil film on 12 cone valve wall of oil gas mixed flow chamber is set to become thinner evenly, quilt when extra lubricating oil passes through jet gun hole 14
Gas directive mixed flow ball 16, thin thin oil droplet just between 16 spherical surface of the conical wall in oil gas mixed flow chamber 12 and mixed flow ball instead
Birefringence keeps oil gas more uniform, and the shunting at shunting interface 17 for after is prepared.This multiple exit oil and gas distributor can not only
Avoid caused by Coanda effect oil gas distribution uneven, no matter and the horizontal or vertical installation of oil and gas distributor, gravity can be eliminated
Influence.
Spool 4 is equipped with tap hole, mixed flow ball 16, shunting interface 17, first with oil gas groove 18, second with oil gas groove
19, seal groove 20, third match oil gas groove with oil gas groove the 22, the 5th with oil gas groove the 21, the 4th with oil gas groove the 23, the 6th
24 and sealing ring 2.It is designed with mixed flow ball 16 in the left end of spool 4, mixed flow ball 16 is a semi-round ball, and mixed flow ball 16 is on shunting circle
On face 17,24 axial tap holes 15, tap hole are uniform-distribution on the circumferencial direction coaxial with spool 4 at shunting interface 17
Be divided into 6 groups by depth difference, each group there are four axial tap hole 15, each group of 4 axial holes 15 are equal around the axis of spool 4
Even distribution.
Such as the number of first group of axial direction tap hole 15：a、g、m、s；
The number of second group of axial direction tap hole 15：b、h、n、t；
The number of third group axial direction tap hole 15：c、i、o、u；
The number of 4th group of axial direction tap hole 15：d、j、p、v；
5th group of axis shunts the number to hole 15：e、k、q、w；
The number of 6th group of axial direction tap hole 15：f、l、r、x.
It is recessed with oil gas with oil gas groove 19, third with oil gas groove 18, second that first is machined on the cylindrical surface of spool 4
Slot the 21, the 4th matches oil gas groove 24 with oil gas groove the 22, the 5th with oil gas groove the 23, the 6th, in each oil gas groove both sides
Seal groove 20 in all install have sealing ring 2,4 radial tap holes 25 are machined in each oil gas groove, at this
Also there is number respectively on a little radial direction tap holes 25
First number with radial tap hole 25 in oil gas groove 18:A、G、M、S；
Second number with radial tap hole 25 in oil gas groove 19:B、H、N、T；
Number of the third with radial tap hole 25 in oil gas groove 21:C、I、O、U；
4th number with radial tap hole 25 in oil gas groove 22:D、J、P、V；
5th number with radial tap hole 25 in oil gas groove 23:E、K、Q、W；
6th number with radial tap hole 25 in oil gas groove 24:F、L、R、X.
A in axial tap hole 15 is communicated with the A in radial tap hole 25；
B in axial tap hole 15 is communicated with the B in radial tap hole 25；
C in axial tap hole 15 is communicated with the C in radial tap hole 25；
…
X in axial tap hole 15 is communicated with the X in radial tap hole 25.
Such first group four axial tap holes 15, which have led to first, matches oil gas groove 18, second group four axial tap holes
15, which have led to second, matches oil gas groove 19, and the axial tap holes of third group four 15, which have led to third, matches oil gas groove 21, the 4th group
Four axial tap holes 15, which have led to the 4th, matches oil gas groove 22, and the 5th group four axial tap holes 15, which have led to the 5th, matches oil gas
Groove 23, the 6th group four axial tap holes 15, which have led to the 6th, matches oil gas groove 24.
Valve body 7 be equipped with the first oil gas vent 11, the second oil gas vent 3, third oil gas vent 10, the 4th oil gas vent 5,
5th oil gas vent 9, the 6th oil gas vent 6 and silk plug 8.First oil gas vent 11 is connected with first with oil gas groove 18, the
Two oil gas vents 3 are connected with second with oil gas groove 19, and third oil gas vent 10 is connected with third with oil gas groove 21, the
Four oil gas vents 5 are connected with the 4th with oil gas groove 22, and the 5th oil gas vent 9 is connected with the 5th with oil gas groove 23, the
Six oil gas vents 6 are connected with the 6th with oil gas groove 24.
The workflow of the present invention is as follows：
Oil gas is come in from the oil and gas import 13 of first guide block 1, and enter mixed flow chamber 12 by jet gun hole 14 carries out mixed flow, oil to oil gas
For gas by 24 axial tap holes 15 on uniform divided flows to shunting interface, 24 axial tap holes 15 are divided into 6 groups（First
Group, second group, third group, the 4th group, the 5th group, the 6th group）, oil gas is by every group 4 axial tap holes 15（First group of a, g, m,
S, second group of b, h, n, t, third group c, i, o, u, the 4th group of d, j, p, v, the 5th group of e, k, q, w, the 6th group of f, l, r, x）And phase
Corresponding radial direction tap hole 25 is transmitted to matches oil gas groove accordingly（First in oil gas groove 18 radial tap hole A, G, M,
S, second with radial tap hole B, H, N, T in oil gas groove 19, third in oil gas groove 21 radial tap hole C, I, O,
U, the 4th with radial tap hole D, J, P, V in oil gas groove 22, the 5th in oil gas groove 23 radial tap hole E, K, Q,
W, the 6th F, L, R, X with the radial tap hole 25 in oil gas groove 24）, then by matching oil gas groove（First with oil gas groove 18,
Second matches oil with oil gas groove the 22, the 5th with oil gas groove the 21, the 4th with oil gas groove 19, third with oil gas groove the 23, the 6th
Gas groove 24）It is transmitted to corresponding oil gas vent（First oil gas vent 11, the second oil gas vent 3, third oil gas vent 10,
Four oil gas vents 5, the 5th oil gas vent 9, the 6th oil gas vent 6）.
The present invention has the following advantages：
1, the impartial distribution for realizing oil gas, is greatly expanded the application field of oil-air lubrication.
2, oil and gas distributor itself also has the function of distributing oil mass, therefore the element of oil mass can be distributed in reduction system
Such as the quantity of stepwise type distributor (piston), so that set of system is lubricated thousands of oil sites and become a reality, decreases and be
The quantity of moving component in system, makes that system operation is more reliable, failure rate is lower.
3, since multiple spot oil and gas distributor can be directly installed in equipment, therefore setting from oil and gas distributor to oil site
Piping can be shortened as possible on standby host, while an Oil/Gas Pipe and oil and gas distributor need only be used to connect from the outlet of air-fuel mixture block
Dozens of oil site can be supplied by connecing.
Claims (5)
1. a kind of multiple exit oil and gas distributor, which is characterized in that composition includes first guide block（1）, valve body（7）With columned valve
Core（4）, the valve body（7）It is equipped with and spool（4）Matched valve opening, one end of the valve opening is by silk plug（8）Sealing, the other end
By first guide block（1）It blocks and passes through first guide block（1）Interior jet gun hole（14）It is connected to oil-gas pipeline, is set on the hole wall of valve opening
There are multiple oil gas vents along its axial alignment, the spool（4）Positioned at valve body（7）Valve opening in, in spool（4）Cylinder on
With valve body（7）The corresponding position of each oil gas vent be equipped with and spool（4）Coaxial ring-type matches oil gas groove, spool
（4）Direction elder generation guide block（1）End face be equipped with and each tap hole communicated with oil gas groove.
2. multiple exit oil and gas distributor according to claim 1, which is characterized in that elder generation's guide block（1）Interior jet gun
Hole（14）With spool（4）Corresponding one end is extended to the oil gas mixed flow chamber of taper（12）, the other end be equipped with and oil-gas pipeline phase
Matched oil and gas import（13）, the spool（4）With first guide block（1）Hemispheric mixed flow ball is equipped in the middle part of opposite end face
（16）, the tap hole on the end face is around mixed flow ball（16）It is uniformly distributed.
3. multiple exit oil and gas distributor according to claim 1 or 2, which is characterized in that the spool（4）End face to each
A tap hole setting with oil gas groove is multigroup, and the quantity of each group tap hole is identical, and every group of correspondence one matches oil gas groove, each
Tap hole by with oil gas mixed flow chamber（12）The axial tap hole of connection（15）The radial tap hole being connected to with oil gas groove
（25）It is formed by connecting, multiple axial tap holes of every group of tap hole（15）With radial tap hole（25）Around spool（4）Axis it is equal
Even distribution.
4. multiple exit oil and gas distributor according to claim 3, which is characterized in that in spool（4）Close to first guide block（1）
One end and adjacent with being equipped between oil gas groove and spool（4）Coaxial sealing ring（2）, each sealing ring（2）It is interior
Side is embedded in spool（4）Annular seal groove on cylinder（20）Interior, outside is pressed on the inner wall of valve opening.
5. multiple exit oil and gas distributor according to claim 4, which is characterized in that the valve body（7）On oil gas vent
It is evenly distributed on spool（4）Both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810367104.4A CN108468941A (en) | 2018-04-23 | 2018-04-23 | A kind of multiple exit oil and gas distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810367104.4A CN108468941A (en) | 2018-04-23 | 2018-04-23 | A kind of multiple exit oil and gas distributor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108468941A true CN108468941A (en) | 2018-08-31 |
Family
ID=63263529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810367104.4A Withdrawn CN108468941A (en) | 2018-04-23 | 2018-04-23 | A kind of multiple exit oil and gas distributor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108468941A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111691818A (en) * | 2020-05-07 | 2020-09-22 | 中煤科工集团西安研究院有限公司 | Underground coal mine pneumatic directional drilling lubricating device and pneumatic screw drill |
| CN114534198A (en) * | 2022-02-21 | 2022-05-27 | 芜湖市第二人民医院 | Recovered physiotherapy device of paediatrics respiratory function |
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|---|---|---|---|---|
| US6257370B1 (en) * | 1996-06-04 | 2001-07-10 | Rebs Zentralschmiertechnik Gmbh | Process for dividing a viscous liquid conveyed by a flow of gas |
| JP2005076774A (en) * | 2003-09-01 | 2005-03-24 | Nsk Ltd | Oil air lubricating device |
| CN2746245Y (en) * | 2004-11-10 | 2005-12-14 | 启东润滑设备有限公司 | Oil gas distributor |
| CN204358410U (en) * | 2014-12-31 | 2015-05-27 | 烟台华顺机械工程设备有限公司 | Built-in three outlet oil and gas distributors |
| CN205065707U (en) * | 2015-09-22 | 2016-03-02 | 中国能源建设集团广东省电力设计研究院有限公司 | Thick moulded coal mud spray tube of limit |
| CN208107617U (en) * | 2018-04-23 | 2018-11-16 | 宣化钢铁集团有限责任公司 | A kind of multiple exit oil and gas distributor |
-
2018
- 2018-04-23 CN CN201810367104.4A patent/CN108468941A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6257370B1 (en) * | 1996-06-04 | 2001-07-10 | Rebs Zentralschmiertechnik Gmbh | Process for dividing a viscous liquid conveyed by a flow of gas |
| JP2005076774A (en) * | 2003-09-01 | 2005-03-24 | Nsk Ltd | Oil air lubricating device |
| CN2746245Y (en) * | 2004-11-10 | 2005-12-14 | 启东润滑设备有限公司 | Oil gas distributor |
| CN204358410U (en) * | 2014-12-31 | 2015-05-27 | 烟台华顺机械工程设备有限公司 | Built-in three outlet oil and gas distributors |
| CN205065707U (en) * | 2015-09-22 | 2016-03-02 | 中国能源建设集团广东省电力设计研究院有限公司 | Thick moulded coal mud spray tube of limit |
| CN208107617U (en) * | 2018-04-23 | 2018-11-16 | 宣化钢铁集团有限责任公司 | A kind of multiple exit oil and gas distributor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111691818A (en) * | 2020-05-07 | 2020-09-22 | 中煤科工集团西安研究院有限公司 | Underground coal mine pneumatic directional drilling lubricating device and pneumatic screw drill |
| CN111691818B (en) * | 2020-05-07 | 2022-05-17 | 中煤科工集团西安研究院有限公司 | Underground coal mine pneumatic directional drilling lubricating device and pneumatic screw drill |
| CN114534198A (en) * | 2022-02-21 | 2022-05-27 | 芜湖市第二人民医院 | Recovered physiotherapy device of paediatrics respiratory function |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180831 |
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| WW01 | Invention patent application withdrawn after publication |