Cable pipeline plugging device and haulage rope protection device

文档序号:1848971 发布日期:2021-11-16 浏览:6次 中文

阅读说明:本技术 一种线缆管路封堵装置及牵引绳保护装置 (Cable pipeline plugging device and haulage rope protection device ) 是由 胡素琼 徐勇 刘彦颉 于 2021-07-20 设计创作,主要内容包括:本发明公开了一种线缆管路封堵装置及牵引绳保护装置,所述牵引绳保护装置包括固定体和位移杆,所述固定体为中空的结构,所述位移杆对称地滑动贯穿设置于所述固定体两侧,所述固定体两侧的端部内壁设有第一限位环,所述位移杆进入所述固定体一端的端部设有与第一限位环配合的第二限位环,位移杆能够在固定体内部自由在水平方向上移动,第一限位环和第二限位环的设置使得位移杆端部始终保持在固定体的内部。(The invention discloses a cable pipeline plugging device and a traction rope protection device, wherein the traction rope protection device comprises a fixing body and a displacement rod, the fixing body is of a hollow structure, the displacement rod symmetrically penetrates through the two sides of the fixing body in a sliding mode, first limiting rings are arranged on the inner walls of the end parts of the two sides of the fixing body, a second limiting ring matched with the first limiting ring is arranged on the end part, entering the fixing body, of the displacement rod, the displacement rod can freely move in the horizontal direction inside the fixing body, and the end part of the displacement rod is always kept inside the fixing body due to the arrangement of the first limiting ring and the second limiting ring.)

1. A haulage rope protection device which characterized in that: the displacement rod is symmetrically arranged on two sides of the fixing body in a sliding and penetrating mode, a first limiting ring is arranged on the inner wall of the end portion of two sides of the fixing body, and a second limiting ring matched with the first limiting ring is arranged at the end portion of one end of the fixing body.

2. A pull-cord protection device as claimed in claim 1, wherein: the inner side of the fixed body is symmetrically provided with two fixed walls, and the outer sides of the fixed walls are provided with springs connected with the displacement rods.

3. A cable pipeline plugging device which characterized in that: the traction rope protection device comprises the traction rope protection device and a support cylinder as claimed in claim 1 or 2, wherein a support plate is rotatably mounted on the outer wall of the support cylinder, a fixing component is connected to one end, away from the support cylinder, of the support plate, a traction mechanism for traction rotation of the support plate is arranged on the support cylinder, when an included angle between the tangent line of the end, away from the support cylinder, of the support plate and the surface of the support cylinder is increased, the fixing component and the support plate are opposite to each other and are far away from the surface of the support cylinder, and two ends of the fixing component are relatively close to the surface of the support cylinder; when the included angle between the end of the supporting plate far away from the supporting cylinder and the surface tangent piece of the supporting cylinder is reduced, the opposite position of the fixing component and the supporting plate is close to the surface of the supporting cylinder.

4. A cable line plugging device according to claim 3 wherein: the fixing assembly comprises a plurality of pressing plates and a plurality of elastic connecting pieces, two adjacent pressing plates are movably connected through the elastic connecting pieces, and one of the pressing plates is rotatably connected with one end, far away from the supporting cylinder, of the supporting plate.

5. A cable line plugging device according to claim 4, wherein: traction mechanism includes support column, first haulage rope and drive assembly, the support column rotate install in on the outer wall of a support section of thick bamboo, fixed mounting has first rope winding wheel on the support column, the one end and the first rope winding wheel fixed connection of first haulage rope, the other end of first haulage rope with backup pad fixed connection, drive assembly with the support column drive is connected.

6. A cable line plugging device according to claim 5, wherein: the two fixed walls form a hollow cavity, the first rope winding wheel is arranged inside the cavity, the supporting column penetrates through the fixed body, and the first traction rope penetrates through the two fixed walls.

7. A cable line plugging device according to claim 3 or 6, wherein: a fixing column is fixedly connected between the bottom end of the fixing body and the supporting cylinder.

8. A cable line plugging device according to claim 5, wherein: the displacement rod is of a hollow structure, and the first traction rope penetrates through the displacement rod.

9. A cable line plugging device according to claim 5, wherein: one end of the displacement rod, which is far away from the fixed body, is fixedly connected with the supporting plate.

10. A cable line plugging device according to claim 5, wherein: the displacement rod is made of flexible materials.

Technical Field

The invention relates to the field of cables, in particular to a cable pipeline plugging device and a traction rope protection device.

Background

Cable conduit sealing is a pipeline sealing technology. The main function is to prevent sewage and rainwater from flowing into the pipeline, so that the cable is immersed in water for a long time and runs in danger; the sewage and the rainwater are prevented from seeping through the pipeline, and the running safety of adjacent inspection wells or transformer substations/switching stations is damaged; the device can prevent silt and garbage from being brought in by sewage to block a cable pipeline, so that later-period line inspection and maintenance are influenced; the small animals are prevented from entering the cable pipeline, biting and damaging the cable and breeding and flowing in the pipeline.

The size of cable shutoff among the prior art is fixed, and when the internal diameter of cable duct and the external diameter of cable shutoff differed greatly, the cable shutoff of another size need be changed, can't be applicable to the cable duct of different internal diameters.

In the cable plugging technology in the prior art, the cable is plugged by adopting a hauling rope device, and the hauling rope directly exposed in the air is easy to be lost in a special environment for installing the cable, so that serious consequences can be caused.

Therefore, it is desirable to provide a cable line plugging device and a pull-cord protection device to solve the above problems.

Disclosure of Invention

In order to solve the problems that the size of a cable plug in the prior art is fixed, when the difference between the inner diameter of a cable pipeline and the outer diameter of the cable plug is larger, the cable plug with another size needs to be replaced, the cable plug cannot be suitable for cable pipelines with different inner diameters, a traction rope directly exposed in the air is extremely easy to lose in a special environment for installing cables, and serious consequences can be caused, the invention provides the following technical scheme:

the utility model provides a haulage rope protection device, includes the fixed body and displacement pole, the fixed body is hollow structure, the displacement pole slide symmetrically run through set up in the fixed body both sides, the tip inner wall of fixed body both sides is equipped with first spacing ring, the displacement pole gets into the tip of fixed body one end be equipped with first spacing ring complex second spacing ring, the displacement pole can freely move on the horizontal direction in the fixed body is inside, the setting of first spacing ring and second spacing ring makes displacement pole tip remain the inside at the fixed body throughout.

Preferably, the inner side of the fixing body is symmetrically provided with two fixing walls, the outer side of each fixing wall is provided with a spring connected with the displacement rod, the arrangement of the fixing walls limits the further inward displacement of the displacement rod, and the arrangement of the springs plays a role in cushioning.

A cable pipeline plugging device comprises a traction rope protection device and a supporting cylinder, wherein a supporting plate is rotatably mounted on the outer wall of the supporting cylinder, one end, far away from the supporting cylinder, of the supporting plate is connected with a fixing component, a traction mechanism for traction of the supporting plate to rotate is arranged on the supporting cylinder, when an included angle between the tail end, far away from the supporting cylinder, of the supporting plate and a tangent line of the surface of the supporting cylinder is increased, the fixing component and the supporting plate are opposite to each other and far away from the surface of the supporting cylinder, and two ends of the fixing component are relatively close to the surface of the supporting cylinder; work as the backup pad is kept away from the terminal of a support section of thick bamboo and is supported when a section of thick bamboo surface tangent line spare contained angle diminishes, the relative position of fixed subassembly and backup pad is close to the surface of a support section of thick bamboo, at first place a support section of thick bamboo in cable duct, then it is rotatory through drive mechanism pulling backup pad for the backup pad drives fixed subassembly and removes, the rotatory angle of backup pad is bigger, fixed subassembly is big more apart from the distance of a support section of thick bamboo, press on cable duct's inner wall until fixed subassembly, thereby realize fixing a support section of thick bamboo in cable duct through a plurality of fixed subassemblies that the symmetry set up.

Preferably, the fixing component comprises a plurality of pressing plates and a plurality of elastic connecting pieces, the adjacent pressing plates are movably connected through the elastic connecting pieces, one of the pressing plates is rotatably connected with one end, far away from the supporting cylinder, of the supporting plate, and the pressing plates can be outwards opened under the elastic action of the elastic connecting pieces, so that the curvature radius of the fixing component can be increased along with the increase of the inner diameter of the cable duct, and each pressing plate can be attached to the inner wall of the cable duct.

Preferably, drive mechanism includes support column, first haulage rope and drive assembly, the support column rotate install in on the outer wall of a support section of thick bamboo, fixed mounting has first rope winding wheel on the support column, the one end and the first rope winding wheel fixed connection of first haulage rope, the other end of first haulage rope with backup pad fixed connection, drive assembly with the support column drive is connected, and it is rotatory through drive assembly drive support column during the installation, it is rotatory to drive first rope winding wheel during the support column is rotatory, twines first haulage rope gradually on first rope winding wheel during first rope winding wheel is rotatory for first haulage rope pulling backup pad is rotatory, and the rotatory angle of backup pad is big more, and the distance of fixed subassembly distance support section of thick bamboo is big more, until fixed subassembly press on cable duct's inner wall can.

Preferably, two fixed walls form a hollow chamber, the first rope winding wheel is arranged in the chamber, the supporting column penetrates through the fixed body, the first traction rope penetrates through the two fixed walls, and the chamber formed by the fixed walls wraps the first rope winding wheel, so that the first rope winding wheel is protected to a certain extent.

Preferably, a fixing column is fixedly connected between the bottom end of the fixing body and the supporting cylinder, and the fixing column is further used for fixing the fixing block.

Preferably, the displacement rod is of a hollow structure, the first traction rope penetrates through the displacement rod, and the displacement rod wraps the first traction rope to prevent the first traction rope from being directly exposed to the special environment where the cable is located.

Preferably, the displacement pole is kept away from the one end of fixed body with backup pad fixed connection, the sliding connection of displacement pole and fixed body and the motion of dragging between first haulage rope and the backup pad combine organically, when first haulage rope inwards contracts and drags the backup pad and make its principle support section of thick bamboo, the displacement pole is internal slip relative to the fixed body, when first haulage rope outwards loosens the backup pad, the displacement pole is external slip relative to the fixed body, and the fixed connection of displacement pole and backup pad has also correspondingly offset the power that some first haulage ropes bore, further protection haulage rope.

Preferably, the displacement rod is made of a flexible material.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic three-dimensional structure of the present invention;

FIG. 2 is an enlarged schematic view of FIG. 1 at A according to the present invention;

FIG. 3 is a schematic front sectional view of the present invention;

FIG. 4 is an enlarged view of the structure of FIG. 3B;

FIG. 5 is an enlarged view of FIG. 3 at C of the present invention;

FIG. 6 is an enlarged view of FIG. 3D of the present invention;

FIG. 7 is a schematic cross-sectional view of a platen according to the present invention;

FIG. 8 is a schematic sectional elevational view of the present invention in use;

FIG. 9 is a side elevation cross-sectional view of the present invention installed in a raceway having a relatively small inner diameter;

FIG. 10 is a side elevation cross-sectional view of the present invention installed in a raceway having a larger inner diameter;

FIG. 11 is a schematic view of the pull-cord protection device of the present invention in an installed configuration;

FIG. 12 is an enlarged cross-sectional view taken at E of FIG. 11 in accordance with the present invention;

fig. 13 is an enlarged view of fig. 12 at F according to the present invention.

In the figure: 1. a support cylinder; 101. a chute; 2. a support plate; 201. a card slot; 3. pressing a plate; 301. an elastic layer; 4. an elastic connecting member; 5. a traction mechanism; 51. a support pillar; 52. a first rope winding wheel; 53. a second rope winding wheel; 54. a first pull cord; 55. a second pull cord; 56. a first bevel gear; 57. a second bevel gear; 58. a rotating shaft; 581. a limiting block; 59. A knob; 591. a limiting groove; 6. a one-way bearing; 7. a ratchet wheel; 8. a support block; 9. an outer inflatable bladder; 10. an inner inflatable air bag; 11. a pressure sensor; 12. a cable duct; 13. a cable; 14. a guide ring; 15. a pull-cord protection device; 1501. a fixed body; 1502. a displacement rod; 1503. a first limit ring; 1504. a second stop collar; 1505. a fixed wall; 1506. a spring; 1507. and (5) fixing the column.

Detailed Description

A traction rope protection device comprises a fixing body 1501 and a displacement rod 1502, wherein the fixing body 1501 is of a hollow structure, the displacement rod 1502 symmetrically slides and penetrates through the two sides of the fixing body 1501, first limiting rings 1503 are arranged on the inner walls of the end portions of the two sides of the fixing body 1501, a second limiting ring 1504 matched with the first limiting ring 1503 is arranged at the end portion, entering one end of the fixing body 1501, of the displacement rod 1502, the displacement rod can freely move in the fixing body in the horizontal direction, and the end portion of the displacement rod is enabled to be always kept in the fixing body through the arrangement of the first limiting rings and the second limiting rings.

Specifically, two fixed walls 1505 are symmetrically arranged on the inner side of the fixed body 1501, a spring 1506 connected with the displacement rod 1502 is arranged on the outer side of the fixed walls 1505, the arrangement of the fixed walls limits the further inward displacement of the displacement rod, and the arrangement of the spring plays a role in cushioning.

A cable pipeline plugging device comprises a traction rope protection device 15 and a supporting cylinder 1, wherein a supporting plate 2 is rotatably installed on the outer wall of the supporting cylinder 1, one end, far away from the supporting cylinder 1, of the supporting plate 2 is connected with a fixing component, a traction mechanism 5 for drawing the supporting plate 2 to rotate is arranged on the supporting cylinder 1, when an included angle between the tail end, far away from the supporting cylinder 1, of the supporting plate 2 and the tangent line of the surface of the supporting cylinder 1 is increased, the position, opposite to the supporting plate 2, of the fixing component is far away from the surface of the supporting cylinder 1, and the two ends of the fixing component are relatively close to the surface of the supporting cylinder 1; when the included angle between the tail end of the support cylinder 1 far away from the support plate 2 and the tangent line piece on the surface of the support cylinder 1 is reduced, the position, opposite to the support plate 2, of the fixing component is close to the surface of the support cylinder 1, the support cylinder is firstly placed in a cable duct, then the support plate is pulled to rotate through the traction mechanism, so that the support plate moves the fixing component to move, the rotating angle of the support plate is larger, the distance between the fixing component and the support cylinder is larger until the fixing component is pressed on the inner wall of the cable duct, and therefore the support cylinder is fixed in the cable duct through a plurality of symmetrically arranged fixing components.

Specifically, the fixed component comprises a plurality of pressing plates 3 and a plurality of elastic connecting pieces 4, the adjacent pressing plates 3 are movably connected through the elastic connecting pieces 4, one of the pressing plates 3 is rotatably connected with one end, far away from the supporting cylinder 1, of the supporting plate 2, and the pressing plates can be outwards opened under the elastic action of the elastic connecting pieces, so that the curvature radius of the fixed component can be increased along with the increase of the inner diameter of the cable duct, and each pressing plate can be attached to the inner wall of the cable duct.

In particular, the traction mechanism 5 comprises a support column 51, a first traction rope 54 and a drive assembly, the supporting column 51 is rotatably mounted on the outer wall of the supporting cylinder 1, a first rope winding wheel 52 is fixedly mounted on the supporting column 51, one end of the first traction rope 54 is fixedly connected with the first rope winding wheel 52, the other end of the first traction rope 54 is fixedly connected with the supporting plate 2, the driving component is in driving connection with the supporting column 51, the supporting column is driven to rotate by the driving component during installation, the first rope winding wheel is driven to rotate when the supporting column rotates, the first traction rope is gradually wound on the first rope winding wheel when the first rope winding wheel rotates, make first haulage rope pulling backup pad rotatory, the rotatory angle of backup pad is big more, and the distance of fixed subassembly apart from a support section of thick bamboo is big more, it can to the fixed subassembly pressure on cable duct's inner wall.

Specifically, two of the fixed walls 1505 form a hollow chamber, the first rope winding wheel 52 is arranged in the hollow chamber, the supporting column 51 penetrates through the fixed body 1501, the first traction rope 54 penetrates through the two fixed walls 1505, and the chamber formed by the fixed walls wraps the first rope winding wheel, so that the first rope winding wheel is protected.

Specifically, a fixing column 1507 is fixedly connected between the bottom end of the fixing body 1501 and the support cylinder 1, and the fixing block is further fixed by the fixing column.

In particular, the displacement rod 1502 is a hollow structure, and the first pulling rope 54 penetrates through the displacement rod 1502, and the displacement rod wraps the first pulling rope to prevent the first pulling rope from being directly exposed to the special environment where the cable is located.

Specifically, the end of the displacement rod 1502 far away from the fixed body 1501 is fixedly connected with the support plate 2, the sliding connection between the displacement rod and the fixed body is organically combined with the pulling movement between the first traction rope and the support plate, when the first traction rope contracts inwards to pull the support plate to enable the principle support cylinder to support the support cylinder, the displacement rod slides inwards relative to the fixed body, when the first traction rope loosens the support plate outwards, the displacement rod slides outwards relative to the fixed body, and the fixed connection between the displacement rod and the support plate correspondingly offsets the force born by part of the first traction rope, so that the traction rope is further protected.

Specifically, the displacement rod 1502 is made of a flexible material.

Specifically, the traction mechanism 5 further includes a second rope winding wheel 53, a second traction rope 55 and a guiding ring 14, the guiding ring 14 is fixedly installed on the outer wall of the supporting cylinder 1, the second rope winding wheel 53 is fixedly installed on the supporting column 51, one end of the second traction rope 55 is fixedly connected with the second rope winding wheel 53, the other end of the second traction rope 55 penetrates through the guiding ring 14 and is fixedly connected with a group of pressing plates 3 far away from the supporting plate 2, the supporting column 51 is rotated before installation, so that the second traction rope 55 is wound on the second rope winding wheel 53, the pressing plate 3 at the most lateral side is pulled by the second traction rope 55 to move towards the supporting cylinder 1, the curvature radius of the fixing component is reduced, so that the plugging device is inserted into the cable duct 12, after the plugging device is inserted into the cable duct 12, the fixing component is opened under the elastic action of the elastic connecting piece 4, and the pressing plate 3 at the most lateral side pulls the second traction rope 55 when the plugging device is opened, thereby it is rotatory to drive second rope winding wheel 53, it is rotatory to drive support column 51 when second rope winding wheel 53 is rotatory, it is rotatory to drive first rope winding wheel 52 when support column 51 is rotatory, twine first haulage rope 54 on first rope winding wheel 52 gradually when first rope winding wheel 52 is rotatory, it is rotatory to make first haulage rope 54 pulling backup pad 2, the rotatory angle of backup pad 2 is big more, fixed subassembly is big more apart from the distance of a support section of thick bamboo 1, until fixed subassembly press on the inner wall of cable duct 12 can.

Specifically, the driving assembly comprises a first bevel gear 56 and a rotating shaft 58, the first bevel gear 56 is fixedly mounted at the bottom end of the supporting column 51, the rotating shaft 58 is rotatably mounted in the wall of the supporting cylinder 1, one end of the rotating shaft 58 is connected with a knob 59, the other end of the rotating shaft 58 is fixedly mounted with a second bevel gear 57, the first bevel gear 56 is meshed with the second bevel gear 57, the rotating shaft 58 can be driven to rotate through the knob 59, the rotating shaft 58 drives the first bevel gear 56 to rotate through the second bevel gear 57 when rotating, the supporting column 51 is driven to rotate when the first bevel gear 56 rotates, and therefore the supporting column 51 is driven to rotate through the driving assembly.

Specifically, a cavity is formed at one end of the knob 59, one end of the rotating shaft 58 is slidably mounted in the cavity, a limiting groove 591 is arranged in the cavity, a limiting block 581 is fixedly mounted on the outer wall of the rotating shaft 58, the limiting block 581 is located in the limiting groove 591, a groove is formed in the side wall of the support cylinder 1, the groove is fixedly mounted in the one-way bearing 6, one end of the knob 59 is engaged with the one-way bearing 6, the knob 59 can only slide relative to the rotating shaft 58 and cannot rotate relative to the rotating shaft 58 through the limiting groove 591 and the limiting block 581, when one end of the knob 59 is inserted into the one-way bearing 6, the knob 59 can only rotate in one direction, the direction of rotation of the knob 59 can enable the first traction rope 54 to be gradually wound on the first rope winding wheel 52, so that the first traction rope 54 cannot pull the first rope winding wheel 52 to rotate when the knob 59 rotates, when the knob 59 needs to be rotated reversely, the knob 59 only needs to be pulled out, the knob 59 and the one-way bearing 6 are disengaged and connected, and the process of tightening the first traction rope 54 by rotating the knob 59 is more labor-saving through the arrangement of the one-way bearing 6.

Specifically, an outer inflatable airbag 9 is fixedly mounted on the outer wall of the support cylinder 1, an inner inflatable airbag 10 is fixedly mounted on the inner wall of the support cylinder 1, the outer inflatable airbag 9 and the inner inflatable airbag 10 are both annular, a gap between the support cylinder 1 and the cable duct 12 can be filled through the outer inflatable airbag 9, a gap between the support cylinder 1 and the cable 13 can be filled through the inner inflatable airbag 10, so that plugging between the cable 13 and the cable duct 12 is realized, sealing is realized through inflation in the outer inflatable airbag 9 and the inner inflatable airbag 10, and the support cylinder is suitable for cable ducts 12 with different inner diameters and cables 13 with different outer diameters.

Specifically, the outer wall of the support cylinder 1 is provided with a chute 101, the chute 101 is slidably provided with a support block 8, the support plate 2 is provided with a clamping groove 201 near the side wall of the outer inflatable airbag 9, the side wall of the support block 8 is in contact with the outer inflatable airbag 9, one side of the top end of the support block 8, which is far away from the outer inflatable airbag 9, is located in the clamping groove 201, when the outer inflatable airbag 9 is inflated, the support block 8 is pushed to move towards the support plate 2 when the outer inflatable airbag 9 is inflated, so that one side of the top end of the support block 8, which is far away from the outer inflatable airbag 9, enters the clamping groove 201, the support plate 2 is further supported, the stability of the support plate 2 is improved, and the support plate is not easy to loosen after long-term use.

Specifically, one side of the pressing plate 3, which is far away from the supporting cylinder 1, is provided with an elastic layer 301, the elastic layer 301 is made of elastic materials such as elastic rubber and elastic plastic, the pressing plate 3 can be attached to the inner wall of the cable duct 12 more tightly through the elastic layer 301, and the friction force between the pressing plate 3 and the inner wall of the cable duct 12 is further improved.

Specifically, a pressure sensor 11 is fixedly mounted on one of the pressure plates 3 far away from the side wall of the support cylinder 1, the pressure sensor 11 is in signal connection with a remote terminal, whether the plugging device is firmly mounted can be judged through a pressure value fed back by the pressure sensor 11 during mounting, and whether the plugging device is loosened can be detected through the pressure sensor 11 during use.

Specifically, the inner fixed mounting of second rope winding wheel 53 has ratchet 7, ratchet 7 suit is in on the support column 51, can drive the rotation of second rope winding wheel 53 through ratchet 7 when support column 51 is rotatory, can pull the most avris clamp plate 3 through second haulage rope 55 and remove towards a support section of thick bamboo 1 when second rope winding wheel 53 is rotatory, stop rotatory support column 51 after, because second rope winding wheel 53 is connected with rotation axis 58 through ratchet 7, under elastic connection's 4 elastic force effect, the most avris clamp plate 3 spring out the laminating on the inner wall of cable duct 12, earlier through drive assembly rotation support column 51 during the installation, support column 51 passes through ratchet 7, second rope winding wheel 53 and second haulage rope 55 drive the most avris clamp plate 3 and remove towards a support section of thick bamboo 1, thereby make fixed subassembly shrink, be convenient for insert the plugging device in cable duct 12, then stop rotatory support column 51, fixed subassembly outwards pops open and cable duct 12's inner wall laminating, can make fixed subassembly can open by oneself through ratchet 7, has further improved the convenience of installation.

The sliding connection of displacement pole and the fixed body and the motion of dragging between first haulage rope and the backup pad combine organically, when the backup pad makes its principle support section of thick bamboo is dragged to the internal contraction of first haulage rope, the internal sliding of displacement pole relatively fixed body, when the backup pad is outwards loosened to first haulage rope, the displacement pole relatively fixed body outwards slides, and the fixed connection of displacement pole and backup pad has also correspondingly offset the power that partial first haulage rope bore, further protection the haulage rope, limiting displacement when the internal displacement of displacement pole has been played on the one hand in the setting of two fixed walls, first rope winding wheel is placed to the structure that on the other hand formed airtight cavity, the direct contact of separation its and external dark moist environment, extension fixture life.

14页详细技术资料下载
上一篇:一种医用注射器针头装配设备
下一篇:一种易于故障识别快速检修型槽式桥架

网友询问留言

已有0条留言

还没有人留言评论。精彩留言会获得点赞!

精彩留言,会给你点赞!