CN106762945B - Explosion proof joint component and its elevating ram - Google Patents
Explosion proof joint component and its elevating ram Download PDFInfo
- Publication number
- CN106762945B CN106762945B CN201611249728.3A CN201611249728A CN106762945B CN 106762945 B CN106762945 B CN 106762945B CN 201611249728 A CN201611249728 A CN 201611249728A CN 106762945 B CN106762945 B CN 106762945B
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- channel
- joint body
- valve block
- explosion proof
- passage
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- 238000004880 explosion Methods 0.000 title claims abstract description 24
- 230000003028 elevating effect Effects 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 239000000446 fuel Substances 0.000 claims abstract description 4
- 230000002265 prevention Effects 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 63
- 230000009471 action Effects 0.000 description 5
- 239000010727 cylinder oil Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000006837 decompression Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The present invention relates to elevating rams, open Explosion proof joint component, including joint body (10), joint body (10) upper end is equipped with the first passage (101) that fuel feeding liquid stream is led to, the bottom surface (1011) of first passage (101) is uniformly distributed on peripheries with the second channel (102) of break-through joint body (10), joint body (10) is equipped with the reset assembly (11) moved back and forth, valve block (12) are fixed on reset assembly (11), gap (13) are equipped between valve block (12) and joint body (10), when valve block (12) is pressurized, second channel (102) are blocked in valve block (12) end face.So that ram cylinder used in light/middle card driver's cabin is provided with explosion prevention function using the present invention, when occurring unexpected, is capable of the personal safety of the guarantee operator of more secure and reliable.The structure is simple, easy to use, reliable performance is at low cost simultaneously, available to use well.
Description
Technical field
The present invention relates to elevating ram more particularly to Explosion proof joint components and its elevating ram.
Background technique
With automobile market the quality and security performance of each components are required it is higher and higher, particularly with those safety
Part is more harsh.The safety member that hydraulic cab elevating ram used in commercial vehicle belongs in chassis member also need by
Especially pay attention to, both must guarantee lifting/decline in the process can efficient operation and secure ratcs, ensure surprisingly to burst in oil circuit again
Driver's cabin not rapid decrease is also ensured that after decompression, to avoid the injury to personnel.The tool used for middle heavy truck at present
There is the ram cylinder of unidirectional locking function, can guarantee the locking of oil cylinder in any position substantially, but for most light
The heavy truck of card and minority uses ram cylinder, internal to have latch functions without design, once oil line pipe bursts, then
Under the action of driver's cabin load, oil cylinder will quickly glide, it is easy to cause safety accident.And setting for light/middle card itself
Meter is in accordance with low-cost high-efficiency principle, using structure is complicated and ram cylinder on the high side and is not suitable for, and
The failure rate of ram cylinder also above plunger type oil cylinder, operability do not have the convenient of plunger type yet.
Summary of the invention
The present invention provides Explosion proof joint component and its lifting oil for the unsafe disadvantage of elevating ram in the prior art
Cylinder.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals:
Explosion proof joint component, including joint body, the first passage that joint body upper end leads to equipped with fuel feeding liquid stream, first
The bottom surface in channel is uniformly distributed on peripheries with the second channel of break-through joint body, and joint body is equipped with the reset assembly moved back and forth,
It is fixed with valve block on reset assembly, gap is equipped between valve block and joint body, when valve block is pressurized, it is logical that valve block end face blocks second
Road, tabletting side wall are inlaid with the position sensor of detector gap distance.Oil circuit disconnects or explosion, then directly logical on the outside of joint body
To atmosphere, moment thoroughly loses the effect of back pressure, and valve block overcomes reset assembly to set under the independent role of cylinder oil
Valve block is tightly pressed on joint body by pressure value, and the second channel of joint body is covered by valve block at this time, inside oil cylinder again
The system for foring a sealing, pressure oil nowhere discharge, and act on piston rod again and withstand driver's cabin downslide, to realize oil cylinder
Explosion prevention function, it is ensured that the safety of operator, valve block are equipped with position sensor, can constantly detector gap size, side
Just research staff adjusts the size of oil liquid pressure to adjust the aperture in gap, to adjust the rate of seat lifting.
Preferably, joint body lower end is equipped with groove, bottom portion of groove is equipped with the third channel being connected to first passage,
Reset assembly includes screw rod and the reset spring that is sleeved on the screw rod, and screw rod is extend into first passage by third channel, separately
Outer one end is stretched out joint body and is fixedly connected with valve block, and reset spring one end is mounted in groove, and the other end is mounted on valve block
On.On the one hand groove is used for position reset spring, as the mounting base of reset spring, reset spring can become according to oil cylinder working-pressure
Change so that screw rod band moving valve plate moves up and down, change the gap between valve block and joint body, thus control joint ontology into
Oil pump capacity.
Preferably, valve block lower end is equipped with lock-nut, lock-nut is connect with screw flight.Lock-nut makes valve block
Fixation is more firm on screw rod, will not easily loosen.
Preferably, screw tip is equipped with limited block, limited block and screw rod integral type, limited block is cylindrical limited block,
The diameter of limited block is greater than the aperture of third channel, the radius of limited block be less than third channel to the center of second channel away from.Limit
Position block makes screw rod without departing from joint body, and screw rod can move up and down under the action of oil pressure, and will not be with joint body
Separation, its end face will not cover second channel when limited block moves up and down, and oil liquid can smoothly pass in and out second channel.
Preferably, the aperture of groove be greater than third channel aperture, the central axes of groove, the central axes of first passage and
The central axes of third channel are all on the same line.It is for vertical movement to guarantee that valve rod is able to drive valve block, when oil circuit decompression, valve
Piece can be timely and strict covers second channel.
Preferably, first passage includes upper channel and lower channel, the aperture of upper channel is less than the hole of lower channel lower end
Diameter.The aperture that the aperture of lower channel is greater than upper channel makes the floor space of lower channel bigger, and second channel is provided on lower channel,
Enable joint body to open up more second channels, to change the disengaging rate of oil liquid, changes the lifting speed of piston rod
Rate meets different clients to the lifting speed of seat.
Elevating ram with Explosion proof joint component, including oil cylinder ontology and undersetting, oil cylinder ontology are fixed with undersetting
Connection, the interior piston rod for being equipped with oscilaltion inside it of oil cylinder ontology, the company of sealing between piston rod and oil cylinder ontology inner sidewall
It is connected to piston component, piston component is fixedly connected with piston rod, the cavity of storage oil liquid is equipped between undersetting and piston component,
Undersetting side wall is equipped with mounting hole and fourth lane, and fourth lane is connected to mounting hole and cavity, is fixed with connector in mounting hole
Component.The elevating ram is disconnected or is burst in external oil circuit, and under joint assembly effect, piston rod can withstand and drive elevating ram
Room downslide is sailed, to realize the explosion prevention function of oil cylinder, it is ensured that the safety of operator.
Preferably, the central axes of fourth lane and the central axes of oil cylinder ontology are on the same line, mounting hole bottom surface is set
There is a connecting hole to extend internally, on the same line, fourth lane vertically connects for the central axes of the central axes of connecting hole and mounting hole
Logical connecting hole.The distance that oil liquid in fuel tank is transported to cavity by joint assembly is short, and piston rod rises or the reflection of decline
Time is fast.
Preferably, being equipped with the gasket seal for preventing oil liquid leakage between joint assembly and undersetting.
Preferably, further including upper bracket, upper bracket is fixedly connected with piston rod.
The present invention has significant technical effect: utilization of the invention due to using above technical scheme, make it is light/in
Ram cylinder used in card driver's cabin is provided with explosion prevention function, when occurring unexpected, is capable of the guarantee behaviour of more secure and reliable
The personal safety of author.The structure is simple, easy to use, reliable performance is at low cost simultaneously, available to use well.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the structural schematic diagram of the elevating ram with joint assembly.
The toponym that each number designation is referred in the figures above is as follows: where 1-joint assembly, 2-oil cylinder sheets
Body, 3-undersettings, 4-piston rods, 5-piston components, 6-cavitys, 7-gasket seals, 8-upper brackets, 10-connector sheets
Body, 11-reset assemblies, 12-valve blocks, 13-gaps, 14-lock-nuts, 15-position sensors, 31-mounting holes, 32-
Fourth lane, 33-connecting holes, the 41-the Five-channel, the 42-the six channel, 101-first passages, 102-second channels,
103-grooves, 104-third channels, 111-screw rods, 112-reset springs, 1011-bottom surfaces, 1012-upper channels,
1013-lower channels, 1111-limited blocks.
Specific embodiment
Present invention is further described in detail with embodiment with reference to the accompanying drawing.
Embodiment 1
Explosion proof joint component, as shown in Figure 1, including joint body 10,10 upper end of joint body is logical equipped with fuel feeding liquid stream
First passage 101, the bottom surface 1011 of first passage 101 is uniformly distributed on peripheries with the second channel 102 of break-through joint body 10, owns
In the central axes of first passage 101, oil liquid is passed in and out apart from short, raising oil liquid flow rate the axis parallel of second channel 102,
Joint body 10 is equipped with the reset assembly 11 moved back and forth, is fixed with valve block 12 on reset assembly 11, and valve block 12 can be with
Reset assembly 11 moves up and down, and gap 13 is equipped between valve block 12 and joint body 10, and gap 13 passes in and out oil cylinder ontology for oil liquid
2, when valve block 12 is pressurized, second channel 102 is blocked in 12 end face of valve block, prevent oil liquid is out of oil cylinder ontology 2 from flowing out, so that oily
Cylinder ontology 2 forms a closed space, and valve block 11 is valve metal film, when external oil duct rapid decompression, inside and outside oil cylinder ontology 2
Pressure difference makes 11 quick pressing of valve block live second channel 102, and valve metal film will not deform easily during the pressing process, protects
The leakproofness of valve block 11 and second channel 102 is demonstrate,proved, 12 side wall of tabletting is inlaid with the position sensor 15 of 13 distance of detector gap.
10 lower end of joint body is equipped with groove 103, and the present embodiment groove 103 is cylindrical groove, and 103 bottom of groove is equipped with
The third channel 104 being connected to first passage 101, reset assembly 11 include screw rod 111 and cover the reset spring on screw rod 111
112, screw rod 111 is extend into first passage 101 by third channel 104, and other end stretches out joint body 10 and valve block
12 are fixedly connected, and the present embodiment valve block 12 is screwed with screw rod 111 and connect, and 112 one end of reset spring is mounted on groove 103
Interior, the other end is mounted on valve block 12.
12 lower end of valve block is equipped with lock-nut 14, and lock-nut 14 is threadedly coupled with screw rod 111, including valve block 12 being capable of jail
Jail is fixed on screw rod 111.
111 top of screw rod is equipped with limited block 1111, limited block 1111 and 111 integral type of screw rod, and limited block 1111 is cylinder
Shape limited block, the diameter of limited block 1111 are greater than the aperture of third channel 104, and the radius of limited block 1111 is less than third channel
104 to second channel 102 center away from.
The aperture of groove 103 is greater than the aperture of third channel 104, the central axes of groove 103, first passage 101 axis
The central axes of line and third channel 104 are all on the same line.
First passage 101 includes upper channel 1012 and lower channel 1013, and upper channel 1012 and lower channel 1013 are all cylinder
Shape channel, the aperture of upper channel are less than the aperture of 1013 lower end of lower channel.
Elevating ram with Explosion proof joint component, as shown in Fig. 2, including oil cylinder ontology 2 and undersetting 3, oil cylinder ontology 2
It is fixedly connected with undersetting 3, the piston rod 4 of oscilaltion inside it, piston rod 4 and oil cylinder ontology 2 is equipped in oil cylinder ontology 2
Piston component 5 is sealedly connected between inner sidewall, piston component 5 is fixedly connected with piston rod 4, undersetting 3 and piston component 5 it
Between be equipped with storage oil liquid cavity 6,3 side wall of undersetting be equipped with mounting hole 31 and fourth lane 32, fourth lane 32 connection peace
Hole 31 and cavity 6 are filled, is fixed with joint assembly 1 in mounting hole 31, when driver's cabin will lift, oil pump is connect oil liquid by oil pipe
It onto joint body 10, is entered in oil cylinder ontology 2 through on joint body 10 second channel 102,4 release of piston rod is acted on
In cab bottom, the lifting of driver's cabin is realized；When driver's cabin will decline, oil pump is commutated into down position, piston rod 4 exists
In-oil cylinder oil liquid is discharged through joint body 10 under the action of driver's cabin load, then is flowed back into oil pump fuel tank through oil pipe, because
Oil pump itself has certain damping action, and certain back pressure can be generated in oil circuit, so in oil circuit back pressure and reset spring
Under the action of 112 elastic force, cylinder oil is also unlikely to for the valve block 12 on joint body 10 to be pressed onto be pasted with 10 end face of joint body
It closes and forms sealing, so as to ensure that driver's cabin slowly safely declines；As long as once meeting accident, such as oil circuit disconnection or quick-fried
It splits, is then directly communicated to atmosphere on the outside of fitting body, moment thoroughly loses the effect of back pressure, independent work of the valve block 12 in cylinder oil
Under, valve block 12 is tightly pressed on 10 end face of joint body by the pressure value for overcoming the setting of reset spring 112, so that originally
Gap B=0, the second channel 102 of joint body 10 is also just covered by valve block 12 at this time, formd inside oil cylinder again one it is close
The system of envelope, pressure oil nowhere discharge, and act on piston rod again and withstand driver's cabin downslide, thus realize the explosion prevention function of oil cylinder,
Ensure the safety of operator.The structure oil cylinder connects pipeline, system can be carried out directly after surprisingly excluding again simultaneously
It uses, without oil cylinder or other mechanisms is readjusted again, there is good functional rehabilitation.
The central axes of fourth lane 32 and the central axes of oil cylinder ontology 2 on the same line, 31 bottom surface of mounting hole be equipped with to
The connecting hole 33 of interior extension, the present embodiment mounting hole 31, the central axes of connecting hole 33 and the central axes of mounting hole 31 are the same as always
On line, 32 vertical connection connecting hole 33 of fourth lane.
The gasket seal 7 for preventing oil liquid leakage is equipped between joint assembly 1 and undersetting 3, gasket seal 7 is metal sealing
Gasket, metallic packing intensity is big, is not in aging etc..
It further include upper bracket 8, upper bracket 8 is fixedly connected with piston rod 4, and upper bracket 8 is fixedly connected with seat, piston rod 4
Oscilaltion drives seat oscilaltion.
4 axial direction of piston rod is equipped with Five-channel 41, and Five-channel 41 is connected to cavity 6, sets on 4 side wall of piston rod
There is the 6th channel 42 being connected to Five-channel 41, the 6th channel 42 is located at the top of piston component 5, and seat rises, and oil liquid can
Entered in the cavity of 5 top of piston component by Five-channel 41 and the 6th channel 42, seat is enabled slowly to increase,
Buffer function is played, is risen more steady.
The central axes of Five-channel 41 and the central axes in the 6th channel 42 are mutually perpendicular to, and facilitate research staff's processing the 5th logical
Road 41 and the 6th channel 42, processing technology of refining.
The central axes of Five-channel 41 and the central axes of fourth lane 32 on the same line, enable oil liquid quick
It enters in the cavity of 5 top of piston component, oil liquid buffering effect is obvious.
In short, the foregoing is merely presently preferred embodiments of the present invention, it is all according to equalization made by scope of the present invention patent
Variation and modification, shall all be covered by the patent of the invention.
Claims (9)
1. Explosion proof joint component, including joint body (10), it is logical that joint body (10) upper end is equipped with fuel feeding liquid stream is led to first
Road (101), it is characterised in that: the bottom surface (1011) of first passage (101) is uniformly distributed on peripheries with the second of break-through joint body (10)
Channel (102), joint body (10) are equipped with the reset assembly (11) moved back and forth, and reset assembly is fixed with valve block on (11)
(12), gap (13) are equipped between valve block (12) and joint body (10), when valve block (12) is pressurized, valve block (12) end face blocks the
Two channels (102), tabletting (12) side wall are inlaid with the position sensor (15) of detector gap (13) distance；Reset assembly (11) packet
It includes screw rod (111) and covers the reset spring (112) on screw rod (111), screw rod (111) one end extend into first passage (101)
Interior, other end is stretched out joint body (10) and is fixedly connected with valve block (12), and reset spring (112) one end is located at joint body
(10) lower end, the other end are mounted on valve block (12)；First passage (101) includes upper channel (1012) and lower channel
(1013), the aperture of upper channel is less than the aperture of lower channel (1013) lower end.
2. Explosion proof joint component according to claim 1, it is characterised in that: joint body (10) lower end is equipped with groove
(103), groove (103) bottom is equipped with the third channel (104) being connected to first passage (101), and screw rod (111) is logical by third
Road (104) is extend into first passage (101), and reset spring (112) one end is mounted in groove (103).
3. Explosion proof joint component according to claim 2, it is characterised in that: valve block (12) lower end is equipped with lock-nut
(14), lock-nut (14) is threadedly coupled with screw rod (111).
4. Explosion proof joint component according to claim 2, it is characterised in that: screw rod (111) top is equipped with limited block
(1111), limited block (1111) and screw rod (111) integral type, limited block (1111) are cylindrical limited block, limited block (1111)
Diameter be greater than the aperture of third channel (104), the radius of limited block (1111) is less than third channel (104) and arrives second channel
(102) center away from.
5. Explosion proof joint component according to claim 2, it is characterised in that: the aperture of groove (103) is greater than third channel
(104) aperture, the central axes of the central axes of groove (103), the central axes of first passage (101) and third channel (104) are all
On the same line.
6. the elevating ram with Explosion proof joint component described in -5 any one according to claim 1, including oil cylinder ontology
(2) it is fixedly connected with undersetting (3), oil cylinder ontology (2) with undersetting (3), is equipped in oil cylinder ontology (2) and rises up and down inside it
The piston rod (4) of drop is sealedly connected with piston component (5), piston component between piston rod (4) and oil cylinder ontology (2) inner sidewall
(5) it is fixedly connected with piston rod (4), the cavity (6) of storage oil liquid, feature is equipped between undersetting (3) and piston component (5)
Be: undersetting (3) side wall be equipped with mounting hole (31) and fourth lane (32), fourth lane (32) connection mounting hole (31) and
Cavity (6), mounting hole (31) is interior to be fixed with joint assembly (1).
7. the elevating ram according to claim 6 with Explosion proof joint component, it is characterised in that: fourth lane (32)
On the same line, mounting hole (31) bottom surface is equipped with the connecting hole to extend internally for the central axes of central axes and oil cylinder ontology (2)
(33), the central axes of the central axes of connecting hole (33) and mounting hole (31) on the same line, fourth lane (32) vertical connection
Connecting hole (33).
8. the elevating ram according to claim 6 with Explosion proof joint component, it is characterised in that: joint assembly (1) with
The gasket seal (7) for preventing oil liquid leakage is equipped between undersetting (3).
9. the elevating ram according to claim 6 with Explosion proof joint component, it is characterised in that: further include upper bracket
(8), upper bracket (8) is fixedly connected with piston rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611249728.3A CN106762945B (en) | 2016-12-29 | 2016-12-29 | Explosion proof joint component and its elevating ram |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611249728.3A CN106762945B (en) | 2016-12-29 | 2016-12-29 | Explosion proof joint component and its elevating ram |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106762945A CN106762945A (en) | 2017-05-31 |
| CN106762945B true CN106762945B (en) | 2019-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611249728.3A Active CN106762945B (en) | 2016-12-29 | 2016-12-29 | Explosion proof joint component and its elevating ram |
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| CN (1) | CN106762945B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115045889B (en) * | 2022-08-15 | 2022-10-25 | 烟台山河液压部件有限公司 | Shock attenuation hydraulic cylinder |
| CN116986532A (en) * | 2023-07-25 | 2023-11-03 | 大大科技(宁国)有限公司 | An explosion-proof hydraulic cylinder for boarding bridge |
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| CN205244471U (en) * | 2015-11-25 | 2016-05-18 | 江苏华太电力仪表有限公司 | Explosion -proof needle type valve |
| CN205271458U (en) * | 2016-01-15 | 2016-06-01 | 重庆机床(集团)有限责任公司 | Clamp force adjustable cutter arbor tensioning mechanism |
| CN205780005U (en) * | 2016-05-31 | 2016-12-07 | 常州市顺景油缸有限公司 | Explosion-proof type carries material oil cylinder |
| CN206386330U (en) * | 2016-12-29 | 2017-08-08 | 浙江科力车辆控制系统有限公司 | A kind of Explosion proof joint component and its elevating ram |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2676475Y (en) * | 2004-01-08 | 2005-02-02 | 上海理工大学实业总公司 | Explosion proof joint |
| CN202251222U (en) * | 2011-10-14 | 2012-05-30 | 沈阳矿山机械有限公司 | Explosion-proof hydraulic cylinder for heading machine |
| CN102628462A (en) * | 2012-04-18 | 2012-08-08 | 江苏悦达专用车有限公司 | Box toppling cylinder of sweeping machine |
| CN202597320U (en) * | 2012-04-18 | 2012-12-12 | 江苏悦达专用车有限公司 | Pipe-explosion-preventing and self-locking oil cylinder |
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| CN203891825U (en) * | 2014-06-13 | 2014-10-22 | 邓华 | Marine pilot production anti-explosion device |
| CN205244471U (en) * | 2015-11-25 | 2016-05-18 | 江苏华太电力仪表有限公司 | Explosion -proof needle type valve |
| CN105253820A (en) * | 2015-11-27 | 2016-01-20 | 衡阳合力工业车辆有限公司 | Explosionproof internal-combustion forklift truck |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106762945A (en) | 2017-05-31 |
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