CN109973128B - Shock-proof type hydraulic prop with safeguard function - Google Patents
Shock-proof type hydraulic prop with safeguard function Download PDFInfo
- Publication number
- CN109973128B CN109973128B CN201910243360.7A CN201910243360A CN109973128B CN 109973128 B CN109973128 B CN 109973128B CN 201910243360 A CN201910243360 A CN 201910243360A CN 109973128 B CN109973128 B CN 109973128B
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- China
- Prior art keywords
- sealing ring
- main body
- shock
- hydraulic prop
- sliding
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- Expired - Fee Related
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
Abstract
The invention relates to a shock-absorbing hydraulic prop with a protection function, which comprises a main body, a dustproof mechanism and two shock-absorbing mechanisms, wherein the shock-absorbing mechanism is arranged at one end of the main body, the dustproof mechanism is arranged between the two shock-absorbing mechanisms, the shock-absorbing mechanisms comprise a supporting plate, a chute, a sliding rod, a sliding block, a limiting component and two springs, the dustproof mechanism comprises a first sealing ring, a second sealing ring, two dustproof curtains, two connecting rings and at least two reinforcing components, the limiting component comprises a moving ring, two limiting blocks and two limiting plates, the shock-absorbing hydraulic prop with the protection function reduces the probability of damage of the hydraulic prop in the transportation process through the buffer action of the shock-absorbing mechanism on the main body, improves the practicability of the hydraulic prop, reduces the probability of stain accumulation on the main body through the protection action of the dustproof mechanism on the main body, the probability of the hydraulic prop breaking down is reduced.
Description
Technical Field
The invention relates to the field of coal mining equipment, in particular to a shock-absorbing hydraulic prop with a protection function.
Background
The hydraulic prop is a single telescopic prop which generates working resistance by utilizing liquid pressure and realizes prop lifting and unloading, the single hydraulic prop is mainly divided into a suspension type, a double-telescopic suspension type, a DN inner injection type and a glass fiber reinforced plastic single hydraulic prop, the single hydraulic prop is composed of parts such as a cylinder body, a movable prop, a valve and the like, wherein the three-way valve is the heart of the outer injection type single hydraulic prop and is composed of a one-way valve, an unloading valve and a safety valve king part, the one-way valve is used for supplying liquid to the single hydraulic prop, the unloading valve is used for unloading the single hydraulic prop, and the safety valve ensures that the single hydraulic prop has constant resistance.
The hydraulic prop is used as one of coal mine slotting equipment, the safety of coal mine exploitation is greatly improved, if no effective protective measures are taken in the long-distance transportation process of the hydraulic prop, the damage of a sealing hole of the hydraulic prop, the bending of a piston, the sinking of a cylinder body and the falling of a spring can be caused, the practicability of the hydraulic prop is reduced, and moreover, in the using process of the hydraulic prop, parts such as a three-purpose valve, an oil cylinder, a piston and the like are often stained with coal slime, small sand grains, oil dirt, iron rust and the like, so that the sealing performance is greatly influenced, the liquid leakage of a handle, a base or a three-purpose valve is caused, and the prop is automatically unloaded and poured.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the damping type hydraulic prop with the protection function is provided.
The technical scheme adopted by the invention for solving the technical problems is as follows: a shock-absorbing hydraulic prop with a protection function comprises a main body, a dust-proof mechanism and two shock-absorbing mechanisms, wherein the shock-absorbing mechanisms are arranged at one end of the main body, and the dust-proof mechanism is arranged between the two shock-absorbing mechanisms;
the damping mechanism comprises a supporting plate, a sliding groove, a sliding rod, a sliding block, a limiting assembly and two springs, wherein the supporting plate is perpendicular to the axis of the main body, the sliding groove is formed in one side, close to the main body, of the supporting plate, the sliding rod is perpendicular to the axis of the main body, the sliding rod is fixed inside the sliding groove, the sliding block is matched with the sliding groove, the sliding block is arranged inside the sliding groove, a through hole is formed in the sliding block, the sliding rod penetrates through the through hole, the sliding block is connected with the sliding rod in a sliding mode, the sliding block is fixedly connected with one end of the main body, the springs are sleeved on the sliding rod, two ends of the sliding block are connected with the sliding groove through the springs, the;
dustproof mechanism includes first sealing ring, second sealing ring, two dustproof curtains, two go-between and two at least reinforcement assembly, first sealing ring and second sealing ring all with the coaxial setting of main part, first sealing ring supports each other with the second sealing ring and leans on, the shape of dustproof curtain is the cylinder, the main part sets up the inside at dustproof curtain, first sealing ring and second sealing ring all establish in the periphery of first sealing ring and second sealing ring through dustproof curtain and backup pad fixed connection, two go-between cover respectively, and two go-between are through each reinforcement assembly fixed connection.
As preferred, in order to improve the stability of hydraulic prop, spacing subassembly includes shifting ring, two stoppers and two limiting plates, shifting ring and the coaxial setting of main part, the shifting ring cover is established in the main part, the stopper is fixed in one side of shifting ring, the limiting plate is fixed in the one side that is close to the main part of backup pad, the limiting plate is parallel with the axis of main part, one side that is close to the main part of limiting plate is equipped with the spread groove, the spread groove matches with the stopper.
Preferably, in order to improve the connection stability of the two connection rings, the reinforcing component comprises a fixing block, two notches and two protrusions, wherein one side of the fixing block, which is close to the connection rings, is provided with a notch, the two protrusions are respectively arranged on two sides of the inner wall of the notch, the two notches are respectively arranged on one sides, which are far away from each other, of the two connection rings, the protrusions and the notches are arranged oppositely, and the protrusions are arranged inside the notches.
Preferably, in order to improve the convenience of the mounting and dismounting of the fixing block, the shape of the bump is hemispherical, and the notch is matched with the bump.
Preferably, in order to improve the sealing performance between the first sealing ring and the second sealing ring, an annular groove is formed in one side of the first sealing ring, a rubber ring is arranged in one side of the second sealing ring, the rubber ring is matched with the annular groove, and the rubber ring is arranged inside the annular groove.
Preferably, in order to improve the smoothness of the sliding of the slider, the inside of the sliding groove is coated with grease.
Preferably, in order to improve the connection stability of the limiting block and the limiting plate, the limiting block is provided with anti-skid grains.
Preferably, in order to prolong the service life of the hydraulic prop, the main body is coated with an anti-corrosion zinc coating.
Preferably, the support plate is made of stainless steel in order to prolong the service life of the support plate.
Preferably, a cushion pad is provided on the outer circumference of the support plate in order to improve the shock absorbing performance of the hydraulic strut.
The damping type hydraulic prop with the protection function has the advantages that the damping effect of the damping mechanism on the main body is utilized to reduce the probability of damage of the hydraulic prop in the transportation process, the practicability of the hydraulic prop is improved, compared with the existing damping mechanism, the damping mechanism realizes the fixation and separation of the main body and the supporting plate through the limiting assembly, the stability of the hydraulic prop in use is improved, the probability of stain accumulation on the main body is reduced through the protection effect of the dustproof mechanism on the main body, the probability of the fault of the hydraulic prop is reduced, and compared with the existing dustproof mechanism, the dustproof mechanism is simple in structure, the number of fault points of the mechanism is reduced, and the fault rate of the mechanism is reduced.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of a shock absorbing hydraulic strut with a guarding function according to the present invention;
FIG. 2 is a schematic structural view of a shock absorbing mechanism of a shock absorbing hydraulic strut with a guarding function according to the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 1;
FIG. 4 is an enlarged view of portion B of FIG. 1;
in the figure: 1. the device comprises a moving ring, a main body, a dustproof curtain, a supporting plate, a first sealing ring, a second sealing ring, a spring, a sliding block, a sliding rod, a sliding groove, a limiting block, a limiting plate, a connecting groove, a rubber ring, an annular groove, a protrusion, a notch, a connecting ring and a fixing block, wherein the moving ring comprises 2, the main body, 3, the dustproof curtain, 4, the supporting plate, 5, the first sealing ring, 6, the second sealing ring, 7, the spring, 8, the sliding block.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1, a shock-absorbing hydraulic prop with a protection function comprises a main body 2, a dust-proof mechanism and two shock-absorbing mechanisms, wherein the shock-absorbing mechanism is arranged at one end of the main body 2, and the dust-proof mechanism is arranged between the two shock-absorbing mechanisms;
through the buffer action of the damping mechanism on the main body 2, the probability of damage of the hydraulic prop in the transportation process is reduced, and the practicability of the hydraulic prop is improved, moreover, through the protection action of the dustproof mechanism on the main body 2, the probability of stain accumulation on the main body 2 is reduced, and the probability of failure of the hydraulic prop is reduced;
as shown in fig. 2, the damping mechanism comprises a supporting plate 4, a sliding groove 10, a sliding rod 9, a sliding block 8, a limiting component and two springs 7, the supporting plate 4 is vertical to the axis of the main body 2, the sliding groove 10 is arranged at one side of the supporting plate 4 close to the main body 2, the sliding rod 9 is vertical to the axis of the main body 2, the sliding rod 9 is fixed inside the sliding groove 10, the sliding block 8 is matched with the sliding groove 10, the sliding block 8 is arranged inside the sliding groove 10, a through hole is arranged inside the sliding block 8, the slide rod 9 passes through the through hole, the slide block 8 is connected with the slide rod 9 in a sliding way, the slide block 8 is fixedly connected with one end of the main body 2, the spring 7 is sleeved on the sliding rod 9, two ends of the sliding block 8 are connected with the sliding groove 10 through the spring 7, the spring 7 is in a compressed state, and the limiting assembly is arranged between the support plate 4 and the main body 2;
in the process of transporting the hydraulic prop, an operator horizontally places the hydraulic prop on a vehicle, so that the support plate 4 is abutted against a vehicle body, at the moment, under the supporting action of the slide rod 9, the stability of connection between the slide block 8 and the slide groove 10 is improved, the main body 2 can reciprocate up and down along the slide groove 10, then under the buffer action of the two springs 7 on the slide block 8, the probability of damage of the main body 2 in the transporting process is reduced, the practicability of the hydraulic prop is improved, and simultaneously, under the limiting action of the limiting assembly, the probability of relative movement between the main body 2 and the support plate 4 is reduced in the using process of the hydraulic prop, and the stability of the hydraulic prop is improved;
as shown in fig. 1, the dust-proof mechanism includes a first sealing ring 5, a second sealing ring 6, two dust curtains 3, two connecting rings 18 and at least two reinforcing components, the first sealing ring 5 and the second sealing ring 6 are both coaxially disposed with the main body 2, the first sealing ring 5 and the second sealing ring 6 are abutted against each other, the dust curtain 3 is cylindrical, the main body 2 is disposed inside the dust curtain 3, the first sealing ring 5 and the second sealing ring 6 are both fixedly connected with the supporting plate 4 through the dust curtain 3, the two connecting rings 18 are respectively sleeved on the peripheries of the first sealing ring 5 and the second sealing ring 6, and the two connecting rings 18 are fixedly connected through the reinforcing components;
the first sealing ring 5 of operating personnel pulling supports with second sealing ring 6 each other and leans on, then pull up dustproof curtain 3 under the effect of first sealing ring 5 and second sealing ring 6, then under dustproof curtain 3's protective action, the probability of main part 2 surface accumulation spot has been reduced, the fault rate of hydraulic prop has been reduced, later the convenient degree of two go-between 18 connections and separation has been improved under the effect of each reinforced (rfd) subassembly, then the convenient degree of being connected and separating of first sealing ring 5 and second sealing ring 6 has been improved, then the convenient degree that dustproof curtain 3 receive and releases has been improved, the convenient degree of hydraulic prop maintenance has been improved.
As shown in fig. 2-3, the limiting assembly includes a moving ring 1, two limiting blocks 11 and two limiting plates 12, the moving ring 1 and the main body 2 are coaxially disposed, the moving ring 1 is sleeved on the main body 2, the limiting blocks 11 are fixed on one side of the moving ring 1, the limiting plates 12 are fixed on one side of the supporting plate 4 close to the main body 2, the limiting plates 12 are parallel to the axis of the main body 2, one side of the limiting plates 12 close to the main body 2 is provided with a connecting groove 13, and the connecting groove 13 is matched with the limiting blocks 11;
when the user need use hydraulic prop, user's manual drive shift ring 1 rotates round main part 2, then move the inside of two spread grooves 13 respectively through two stopper 11 of shift ring 1 drive, then improved the stability that limiting plate 12 and stopper 11 are connected through spread groove 13, later under limiting plate 12 is to stopper 11's limiting displacement, fix shift ring 1, later under shift ring 1's effect, main part 2 has been reduced along the gliding probability of spout 10, then the stability that main part 2 is connected with backup pad 4 has been improved, the stability of hydraulic prop has been improved.
As shown in fig. 4, the reinforcing component comprises a fixing block 19, two notches 17 and two protrusions 16, wherein one side of the fixing block 19 close to the connecting ring 18 is provided with a slot, the two protrusions 16 are respectively arranged at two sides of the inner wall of the slot, the two notches 17 are respectively arranged at one sides of the two connecting rings 18 far away from each other, the protrusions 16 are arranged opposite to the notches 17, and the protrusions 16 are arranged inside the notches 17;
when the first sealing ring 5 and the second sealing ring 6 abut against each other, the two connecting rings 18 abut against each other, then an operator clamps the fixing block 19 on the two connecting rings 18, under the mutual limiting action of the notch 17 and the bump 16, the stability of the connection between the fixing block 19 and the connecting rings 18 is improved, the stability of the connection between the first sealing ring 5 and the second sealing ring 6 is improved, when the operator takes the fixing block 19 off the connecting rings 18, the first sealing ring 5 and the second sealing ring 6 can be separated, and the convenience of connection and separation of the first sealing ring 5 and the second sealing ring 6 is improved.
Preferably, in order to improve the convenience of assembling and disassembling the fixing block 19, the shape of the bump 16 is a hemisphere, and the notch 17 is matched with the bump 16;
when the shape of the bump 16 is hemispherical, the resistance between the bump 16 and the notch 17 is reduced, and the convenience of separating and connecting the bump 16 and the notch 17 is improved while the bump 16 and the notch 17 have a mutual limiting effect.
Preferably, in order to improve the sealing performance between the first sealing ring 5 and the second sealing ring 6, an annular groove 15 is formed in one side of the first sealing ring 5, a rubber ring 14 is formed in one side of the second sealing ring 6, the rubber ring 14 is matched with the annular groove 15, and the rubber ring 14 is arranged inside the annular groove 15;
when the rubber ring 14 is caught inside the annular groove 15, the gap between the first seal ring 5 and the second seal ring 6 is reduced, and the sealing performance between the first seal ring 5 and the second seal ring 6 is improved.
Preferably, in order to improve the smoothness of the sliding block 8, the inside of the sliding groove 10 is coated with grease;
the lubricating grease reduces the friction between the slider 8 and the sliding groove 10, and the smoothness of the sliding of the slider 8 is improved.
Preferably, in order to improve the stability of the connection between the limiting block 11 and the limiting plate 12, the limiting block 11 is provided with anti-skid threads;
the friction force between the limiting blocks 11 and 12 is increased through the anti-slip lines, and the connection stability of the limiting blocks 11 and the limiting plates 12 is improved.
Preferably, in order to prolong the service life of the hydraulic prop, the main body 2 is coated with an anti-corrosion zinc coating;
the corrosion speed of the main body 2 is slowed down through the anti-corrosion zinc coating, and the service life of the hydraulic prop is prolonged.
Preferably, in order to prolong the service life of the support plate 4, the support plate 4 is made of stainless steel;
since stainless steel has a good corrosion resistance, the corrosion rate of the support plate 4 is slowed down, and the service life of the support plate 4 is prolonged.
Preferably, in order to improve the shock absorption performance of the hydraulic prop, a cushion pad is arranged on the periphery of the support plate 4;
the impact force between the support plate 4 and the vehicle body is reduced by the cushion pad, and the shock-absorbing performance of the hydraulic strut is improved.
In the process of transporting the hydraulic prop, an operator horizontally places the hydraulic prop on a vehicle, so that the support plate 4 is abutted against a vehicle body, the main body 2 can move up and down in a reciprocating manner along the chute 10, then the probability of damage to the main body 2 in the process of transporting is reduced under the buffer action of the two springs 7 on the slider 8, the practicability of the hydraulic prop is improved, meanwhile, under the limiting action of the limiting component, the probability of relative movement between the main body 2 and the support plate 4 is reduced in the process of using the hydraulic prop, the stability of the hydraulic prop is improved, the operator pulls the first sealing ring 5 and the second sealing ring 6 to abut against each other, the dustproof curtain 3 is pulled up under the action of the first sealing ring 5 and the second sealing ring 6, the probability of dirt accumulation on the surface of the main body 2 is reduced under the protection action of the dustproof curtain 3, and the failure rate of the hydraulic prop is reduced, the convenience degree of connection and separation of the first sealing ring 5 and the second sealing ring 6 is improved under the action of each reinforcing component, the convenience degree of retraction of the dustproof curtain 3 is improved, and the convenience degree of maintenance of the hydraulic prop is improved.
Compared with the prior art, among this shock-proof type hydraulic prop with safeguard function, through damper to main part 2's cushioning effect, the probability that hydraulic prop takes place to damage in the transportation has been reduced, hydraulic prop's practicality has been improved, compare with current damper, this damper passes through spacing subassembly, main part 2 and backup pad 4's fixed and separation have been realized, stability when then having improved hydraulic prop and using, moreover, through the guard action of dustproof mechanism to main part 2, the probability that the spot accumulated to main part 2 has been reduced, the probability that hydraulic prop broke down has been reduced, compare with current dustproof mechanism, this dustproof mechanism simple structure, the quantity of this mechanism's fault point has been reduced, the fault rate of this mechanism has been reduced.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (9)
1. A shock-absorbing hydraulic prop with a protection function comprises a main body (2), and is characterized by further comprising a dust-proof mechanism and two shock-absorbing mechanisms, wherein the shock-absorbing mechanisms are arranged at one end of the main body (2), and the dust-proof mechanism is arranged between the two shock-absorbing mechanisms;
the damping mechanism comprises a supporting plate (4), a sliding groove (10), a sliding rod (9), a sliding block (8), a limiting component and two springs (7), wherein the supporting plate (4) is vertical to the axis of the main body (2), the sliding groove (10) is arranged on one side, close to the main body (2), of the supporting plate (4), the sliding rod (9) is vertical to the axis of the main body (2), the sliding rod (9) is fixed in the sliding groove (10), the sliding block (8) is matched with the sliding groove (10), the sliding block (8) is arranged in the sliding groove (10), a through hole is formed in the sliding block (8), the sliding rod (9) penetrates through the through hole, the sliding block (8) is in sliding connection with the sliding rod (9), the sliding block (8) is fixedly connected with one end of the main body (2), the springs (7) are sleeved on the sliding rod (9), two ends of the sliding block (8) are connected with the sliding groove (10) through the springs (7, the spring (7) is in a compressed state, and the limiting assembly is arranged between the support plate (4) and the main body (2);
the dustproof mechanism comprises a first sealing ring (5), a second sealing ring (6), two dustproof curtains (3), two connecting rings (18) and at least two reinforcing components, wherein the first sealing ring (5) and the second sealing ring (6) are coaxially arranged with a main body (2), the first sealing ring (5) and the second sealing ring (6) are abutted against each other, the dustproof curtain (3) is cylindrical in shape, the main body (2) is arranged inside the dustproof curtain (3), the first sealing ring (5) and the second sealing ring (6) are fixedly connected with a supporting plate (4) through the dustproof curtain (3), the two connecting rings (18) are respectively sleeved on the peripheries of the first sealing ring (5) and the second sealing ring (6), and the two connecting rings (18) are fixedly connected through the reinforcing components;
spacing subassembly includes shift ring (1), two stopper (11) and two limiting plate (12), shift ring (1) and main part (2) coaxial setting, shift ring (1) cover is established on main part (2), one side at shift ring (1) is fixed in stopper (11), one side that is close to main part (2) in backup pad (4) is fixed in limiting plate (12), limiting plate (12) are parallel with the axis of main part (2), one side that is close to main part (2) of limiting plate (12) is equipped with spread groove (13), spread groove (13) match with stopper (11).
2. The shock-absorbing hydraulic prop with a guarding function according to claim 1, characterized in that the reinforcing assembly comprises a fixing block (19), two notches (17) and two projections (16), wherein one side of the fixing block (19) close to the connecting ring (18) is provided with a slot, the two projections (16) are respectively arranged at two sides of the inner wall of the slot, the two notches (17) are respectively arranged at one side of the two connecting rings (18) far away from each other, the projections (16) are arranged opposite to the notches (17), and the projections (16) are arranged inside the notches (17).
3. The hydraulic strut with a guarding function as claimed in claim 2, characterized in that said projection (16) is shaped as a hemisphere, said recess (17) matching with said projection (16).
4. The shock-absorbing hydraulic strut with a safeguard function as claimed in claim 1, characterised in that one side of the first sealing ring (5) is provided with an annular groove (15), one side of the second sealing ring (6) is provided with a rubber ring (14), the rubber ring (14) is matched with the annular groove (15), and the rubber ring (14) is arranged inside the annular groove (15).
5. The shock-absorbing type hydraulic strut with a guarding function according to claim 1, characterized in that the inside of said slide groove (10) is coated with grease.
6. The hydraulic prop with a guarding function, according to claim 1, characterized in that the stopper (11) is provided with anti-skid threads.
7. The hydraulic prop with a function of protection according to claim 1, characterized in that the main body (2) is coated with an anti-corrosion zinc coating.
8. The hydraulic prop with safeguard function according to claim 1, characterized in that the material of the support plate (4) is stainless steel.
9. The hydraulic strut with a function of protection as claimed in claim 1, characterized in that a cushion pad is provided on the outer circumference of the support plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910243360.7A CN109973128B (en) | 2019-03-28 | 2019-03-28 | Shock-proof type hydraulic prop with safeguard function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910243360.7A CN109973128B (en) | 2019-03-28 | 2019-03-28 | Shock-proof type hydraulic prop with safeguard function |
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| Publication Number | Publication Date |
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| CN109973128A CN109973128A (en) | 2019-07-05 |
| CN109973128B true CN109973128B (en) | 2020-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910243360.7A Expired - Fee Related CN109973128B (en) | 2019-03-28 | 2019-03-28 | Shock-proof type hydraulic prop with safeguard function |
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| CN (1) | CN109973128B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110630299B (en) * | 2019-09-26 | 2021-06-15 | 山东博士乐液压有限公司 | Place stable dust-protection type hydraulic prop |
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| US4189257A (en) * | 1977-07-07 | 1980-02-19 | Taiheiyo Engineering Inc. | Sheltering apparatus for use in long wall mining |
| CN201358801Y (en) * | 2009-03-10 | 2009-12-09 | 杨绍柏 | Individual hydraulic prop dustproof cover |
| CN204385364U (en) * | 2014-12-16 | 2015-06-10 | 台州市路桥穗丰纺织机械有限公司 | Air ring cage |
| CN205977255U (en) * | 2016-08-26 | 2017-02-22 | 兖矿集团有限公司 | Soft net device of mining protection |
| CN205977249U (en) * | 2016-08-30 | 2017-02-22 | 曹小荣 | Hydraulic support column protector |
| CN107128571A (en) * | 2017-06-16 | 2017-09-05 | 粉嫩公主生物科技有限公司耒阳分公司 | A kind of packing box to frozen dried food damping |
| CN207406361U (en) * | 2017-11-17 | 2018-05-25 | 王义锋 | For the pillar of method of working face roof timbering |
| CN207931625U (en) * | 2018-01-23 | 2018-10-02 | 宜春学院 | A kind of automotive controls with shock-absorbing function |
| CN208534507U (en) * | 2018-06-23 | 2019-02-22 | 李宝奎 | A kind of anti-collapse bracket of coal mining |
| CN208634529U (en) * | 2018-08-16 | 2019-03-22 | 天津油立方科技有限公司 | A kind of petroleum pipeline support damping device |
-
2019
- 2019-03-28 CN CN201910243360.7A patent/CN109973128B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4189257A (en) * | 1977-07-07 | 1980-02-19 | Taiheiyo Engineering Inc. | Sheltering apparatus for use in long wall mining |
| CN201358801Y (en) * | 2009-03-10 | 2009-12-09 | 杨绍柏 | Individual hydraulic prop dustproof cover |
| CN204385364U (en) * | 2014-12-16 | 2015-06-10 | 台州市路桥穗丰纺织机械有限公司 | Air ring cage |
| CN205977255U (en) * | 2016-08-26 | 2017-02-22 | 兖矿集团有限公司 | Soft net device of mining protection |
| CN205977249U (en) * | 2016-08-30 | 2017-02-22 | 曹小荣 | Hydraulic support column protector |
| CN107128571A (en) * | 2017-06-16 | 2017-09-05 | 粉嫩公主生物科技有限公司耒阳分公司 | A kind of packing box to frozen dried food damping |
| CN207406361U (en) * | 2017-11-17 | 2018-05-25 | 王义锋 | For the pillar of method of working face roof timbering |
| CN207931625U (en) * | 2018-01-23 | 2018-10-02 | 宜春学院 | A kind of automotive controls with shock-absorbing function |
| CN208534507U (en) * | 2018-06-23 | 2019-02-22 | 李宝奎 | A kind of anti-collapse bracket of coal mining |
| CN208634529U (en) * | 2018-08-16 | 2019-03-22 | 天津油立方科技有限公司 | A kind of petroleum pipeline support damping device |
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| CN109973128A (en) | 2019-07-05 |
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