CN110917544B - Arm support structure and operation equipment - Google Patents
Arm support structure and operation equipment Download PDFInfo
- Publication number
- CN110917544B CN110917544B CN201911219512.6A CN201911219512A CN110917544B CN 110917544 B CN110917544 B CN 110917544B CN 201911219512 A CN201911219512 A CN 201911219512A CN 110917544 B CN110917544 B CN 110917544B
- Authority
- CN
- China
- Prior art keywords
- horizontal
- section
- arm
- auxiliary arm
- vertical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005299 abrasion Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Jib Cranes (AREA)
Abstract
The invention relates to the field of engineering machinery and discloses a boom structure and operation equipment. The cantilever crane structure includes the master arm, the auxiliary arm, install the master arm conveyer pipe on the master arm and install the auxiliary arm conveyer pipe on the auxiliary arm, the master arm includes the vertical section that extends along vertical direction, the master arm conveyer pipe includes the vertical pipeline section that corresponds with vertical section, the auxiliary arm includes the horizontal section that extends along the horizontal direction, the auxiliary arm conveyer pipe includes the horizontal pipeline section that corresponds with the horizontal section, the auxiliary arm passes through the horizontal section to be connected in vertical section and can rotate around the axial of vertical section, the one end of horizontal pipeline section passes through rotatory elbow connection in the one end of vertical pipeline section, the cantilever crane structure still includes the rigid connection spare, rotatory elbow passes through the rigid connection spare and is connected in the auxiliary arm in order to rotate with the auxiliary arm. The arm support structure can effectively improve the follow-up property of the rotary elbow, so that the problems of abrasion, clamping stagnation, leakage and the like of the rotary elbow caused by uneven stress are avoided, and in addition, the flexible pipe is prevented from being broken and leaked.
Description
Technical Field
The invention relates to the field of engineering machinery, in particular to a boom structure and operation equipment comprising the boom structure.
Background
At present, the working equipment with the boom structure is increasingly widely applied to engineering operation, such as concrete pump trucks, fire trucks and the like, and brings great convenience to the operation or construction. The boom structure typically includes a boom and a delivery pipe mounted to the boom, the boom structure being operable to deliver material (e.g., water during fire suppression), and in operation, an outlet of the delivery pipe being positioned at a predetermined location, the material being accessible from an inlet of the delivery pipe and being delivered to the predetermined location via the delivery pipe.
However, in order to improve the compactness of the apparatus, as the apparatus is miniaturized, many apparatuses provide an arm frame including a main arm and a sub-arm rotatably connected to the main arm, and connect a transfer pipe mounted on the sub-arm with the transfer pipe on the main arm by way of a swivel elbow fitted with a hose to accommodate the rotation of the sub-arm. However, when the auxiliary arm rotates, the rotating power of the rotary elbow is completely provided by the hose, so that the hose is easy to break and leak in the use process, the rotary elbow cannot perform good follow-up, uneven stress can occur, and the problems of abrasion, clamping stagnation, leakage and the like are caused.
Disclosure of Invention
The invention aims to provide a boom structure and operation equipment comprising the boom structure, so as to solve the problems.
In order to achieve the above object, according to an aspect of the present invention, there is provided a boom structure including a main arm including a vertical section extending in a vertical direction, a sub arm including a vertical pipe section corresponding to the vertical section, a main arm pipe installed on the main arm, and a sub arm pipe installed on the sub arm, the sub arm including a horizontal section extending in a horizontal direction, the sub arm being connected to the vertical section through the horizontal section and rotatable about an axial direction of the vertical section, one end of the horizontal pipe section being connected to one end of the vertical pipe section through a rotary elbow, the boom structure further including a rigid connection member through which the rotary elbow is connected to the sub arm to rotate with the sub arm.
Optionally, one end of the rigid connection member is connected to the swivel elbow, and the other end of the rigid connection member is connected to the horizontal segment.
Optionally, one end of the rigid connection member is fixedly connected to a position of the swivel elbow near the vertical pipe section, and the other end of the rigid connection member is movably connected to the horizontal section so as to be movable in a horizontal direction relative to the horizontal section.
Optionally, the rigid connection is a bent rod.
Optionally, the rigid connection piece includes first horizontal part, second horizontal part and connect in first horizontal part with incline between the second horizontal part, the one end of keeping away from of first horizontal part incline fixedly connected with rotatory elbow, the one end of keeping away from of second horizontal part incline is provided with the bar hole that the level extends, be provided with on the horizontal segment and supply the connecting pin that the bar hole emboliaed, the diameter of connecting pin is less than the length of bar hole.
Optionally, the rigid connection piece comprises a shifting fork portion, the root of the shifting fork portion is connected to one end, far away from the inclined portion, of the first horizontal portion, and the U-shaped fork portion of the shifting fork portion is coaxially fixed around the rotary elbow.
Optionally, the root of the shifting fork part is connected with the first horizontal part through a bolt, and the U-shaped fork part of the shifting fork part is welded to the rotary elbow.
Optionally, the horizontal pipe section is connected with the rotary elbow through a hose, and the length of the hose is larger than the connection distance between the horizontal pipe section and the rotary elbow.
In another aspect, the invention provides a working device comprising the boom structure described above.
Optionally, the operation equipment is a fire engine.
According to the arm support structure, the rotary elbow is rigidly connected to the auxiliary arm through the rigid connecting piece, and when the auxiliary arm rotates, the rotation power of the rotary elbow is provided by the rigid connecting piece, so that the follow-up property of the rotary elbow can be effectively improved, the problems of abrasion, clamping stagnation, leakage and the like of the rotary elbow caused by uneven stress are avoided, and in addition, the problems of breakage and leakage of a hose can be avoided.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:
FIG. 1 is a schematic view of one embodiment of a boom structure of the present invention;
fig. 2 is a fragmentary top view of fig. 1.
Description of the reference numerals
10-Vertical section, 11-horizontal section, 12-connecting pin, 20-vertical section, 21-horizontal section, 22-swivel elbow, 23-hose, 30-rigid connector, 31-first horizontal part, 32-inclined part, 33-second horizontal part, 34-bar hole, 35-shift fork part, 36-bolt.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, horizontal, vertical" are used to refer generally to the orientation shown in the drawings.
In one aspect, the present invention provides a boom structure, the boom structure including a main arm, a sub arm, a main arm transfer pipe mounted on the main arm, and a sub arm transfer pipe mounted on the sub arm, the main arm including a vertical section 10 extending in a vertical direction, the main arm transfer pipe including a vertical pipe section 20 corresponding to the vertical section 10, the sub arm including a horizontal section 11 extending in a horizontal direction, the sub arm transfer pipe including a horizontal pipe section 21 corresponding to the horizontal section 11, the sub arm being connected to the vertical section 10 through the horizontal section 11 and being rotatable about an axial direction of the vertical section 10, one end of the horizontal pipe section 21 being connected to one end of the vertical pipe section 20 through a swivel elbow 22, the boom structure further including a rigid connection 30, the swivel elbow 22 being connected to the sub arm through the rigid connection 30 to rotate with the sub arm.
According to the arm support structure, the rotary elbow 22 is rigidly connected to the auxiliary arm by the rigid connecting piece 30, and when the auxiliary arm rotates, the rotation power of the rotary elbow 22 is provided by the rigid connecting piece 30, so that the follow-up property of the rotary elbow 22 can be effectively improved, the problems of abrasion, clamping stagnation, leakage and the like of the rotary elbow 22 due to uneven stress are avoided, and in addition, the damage and leakage of a hose can be avoided.
It should be noted that the present invention is mainly based on an improvement of the structure of the connection portion between the main arm and the auxiliary arm, so that the structures of the main arm and the auxiliary arm will not be described in detail, and the structural forms of the main arm and the auxiliary arm will not be limited, as long as the main arm includes a vertical section for connection with the auxiliary arm, and the auxiliary arm includes a horizontal section for connection with the main arm. Moreover, the horizontal and vertical references herein are also intended to facilitate an understanding of the orientations shown with reference to the drawings and are not intended to represent the orientations of the boom structure in actual use.
In addition, it will be appreciated that the swivel elbow 22 described above is capable of rotating relative to the vertical tube segment 20, such that the objective of the swivel elbow 22 following upon rotation of the secondary arm is achieved.
Fig. 1 shows a schematic view of an embodiment of the boom structure, in which only the structure of the connection part of the main arm and the auxiliary arm is shown. As shown in fig. 1, one end of the horizontal section 11 of the auxiliary arm is connected to the upper end of the vertical section 10 of the main arm, one end of the horizontal section 21 of the auxiliary arm conveying pipe is connected to the upper end of the vertical section 20 of the main arm conveying pipe through a rotary elbow 22, and the horizontal section 21, the rotary elbow 22 are communicated with the vertical section 20.
In the present invention, the rigid connection 30 may have any suitable configuration, so long as a rigid connection between the swivel elbow 22 and the auxiliary arm is achieved. One end of the rigid connection member 30 is connected to the swivel elbow 22, and the other end of the rigid connection member 30 is preferably connected to the horizontal section 11 of the auxiliary arm, so that the moment for driving the swivel elbow 22 can be shortened, the follow-up performance of the swivel elbow 22 can be improved, and the structure of the rigid connection member 30 can be simplified.
Further, to improve the uniformity of the stress of the swivel elbow 22, one end of the rigid connection member 30 is fixedly connected to the swivel elbow 22 at a position close to the vertical pipe section 20 (i.e., the lower end of the swivel elbow 22 in fig. 1). In addition, in order to adapt to the position requirements of the auxiliary arm with different rotation angles, the other end of the rigid connecting piece 30 is movably connected to the horizontal section 11 so as to be capable of moving along the horizontal direction relative to the horizontal section 11, so that the rigid connecting piece 30 is adaptively adjusted.
According to one embodiment of the invention, the rigid connection 30 is a bent rod. Specifically, for example, as shown in fig. 1, the rigid connection member 30 may include a first horizontal portion 31, a second horizontal portion 33, and an inclined portion 32 connected between the first horizontal portion 31 and the second horizontal portion 33, wherein an end of the first horizontal portion 31, which is far away from the inclined portion 32, is fixedly connected to the swivel elbow 22, an end of the second horizontal portion 33, which is far away from the inclined portion 32, is provided with a horizontally extending bar hole 34, the horizontal section 11 is provided with a connection pin 12 for the bar hole 34 to be sleeved in, and a diameter of the connection pin 12 is smaller than a length of the bar hole 34, as shown in fig. 2 (it should be noted that, the boom structure of fig. 1 is simplified in fig. 2, mainly for displaying a relationship between the connection pin 12 and the bar hole 34). In the rotation process of the auxiliary arm, on one hand, the connecting pin 12 can drive the rigid connecting piece 30 to rotate, and then drive the rotary elbow 22 to rotate; on the other hand, the connecting pin 12 can move along the bar-shaped hole 34 relative to the rigid connecting piece 30, that is, the connecting pin 12 and the inclined part 32 can adaptively adjust the distance according to the rotation angle of the auxiliary arm so as to adapt to the position requirements of different rotation angles of the auxiliary arm.
In order to further improve the uniformity of the stress of the rotary elbow 22, the rigid connection member 30 may further include a fork portion 35, wherein a root portion of the fork portion 35 is connected to an end of the first horizontal portion 31 away from the inclined portion 32, and a U-shaped fork portion of the fork portion 35 is coaxially fixed around the rotary elbow 22. Specifically, as shown in fig.1, a U-shaped fork portion of the fork portion 35 is forked at the lower end of the rotary elbow 22, the U-shaped fork portion is coaxial with the lower end of the rotary elbow 22, the inner circumferential surface of the U-shaped fork portion is attached to the outer circumferential surface of the lower end of the rotary elbow 22, and the U-shaped fork portion may be fixedly connected to the rotary elbow 22 by a bolt or may be welded or riveted to the rotary elbow 22.
In the above, as shown in fig. 1 and 2, the root of the fork portion 35 may be connected to the first horizontal portion 31 by a bolt 36. Of course, the fork portion 35 may be integrally formed with the first horizontal portion 31, the inclined portion 32, and the second horizontal portion 33 to form the rigid coupling 30.
In the invention, the horizontal pipe section 21 and the rotary elbow 22 can be connected through a hose 23, and the length of the hose 23 is larger than the connection distance between the horizontal pipe section 21 and the rotary elbow 22. Since the main arm duct and the sub arm duct are both hard pipes in a normal case, the sub arm duct can be adapted to a length change of the sub arm at the time of rotation by providing the hose 23. In addition, since the rotation power of the swivel elbow 22 is provided by the rigid connection member 30 during the rotation of the sub-arm, damage of the hose 23 during the rotation can be reduced.
In another aspect, the invention provides a working device comprising the boom structure described above.
Wherein, the operation equipment can be a fire engine.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (10)
1. The utility model provides a cantilever crane structure, its characterized in that, cantilever crane structure includes main arm, auxiliary arm, installs main arm conveyer pipe on the main arm and install auxiliary arm conveyer pipe on the auxiliary arm, the main arm includes vertical section (10) along vertical direction extension, main arm conveyer pipe includes vertical pipe section (20) corresponding with vertical section (10), the auxiliary arm includes horizontal section (11) along horizontal direction extension, auxiliary arm conveyer pipe includes horizontal pipe section (21) corresponding with horizontal section (11), the auxiliary arm passes through horizontal section (11) connect in vertical section (10) and can around the axial rotation of vertical section (10), the one end of horizontal pipe section (21) is connected in the one end of vertical pipe section (20) through rotatory elbow (22), the rotatory elbow (22) pass through rigid connection (30) connect in auxiliary arm in order to rotate with the auxiliary arm.
2. Boom structure according to claim 1, characterized in that one end of the rigid connection (30) is connected to the swivel elbow (22), the other end of the rigid connection (30) being connected to the horizontal section (11).
3. Boom structure according to claim 2, characterized in that one end of the rigid connection member (30) is fixedly connected to the swivel elbow (22) at a position close to the vertical pipe section (20), and the other end of the rigid connection member (30) is movably connected to the horizontal section (11) so as to be movable in a horizontal direction with respect to the horizontal section (11).
4. A boom structure according to claim 3, characterized in that said rigid connection (30) is a bent bar.
5. The boom structure according to claim 4, characterized in that the rigid connection member (30) comprises a first horizontal portion (31), a second horizontal portion (33) and an inclined portion (32) connected between the first horizontal portion (31) and the second horizontal portion (33), one end, far away from the inclined portion (32), of the first horizontal portion (31) is fixedly connected to the rotary elbow (22), one end, far away from the inclined portion (32), of the second horizontal portion (33) is provided with a horizontally extending bar-shaped hole (34), a connection pin (12) for the bar-shaped hole (34) to be sleeved in is arranged on the horizontal section (11), and the diameter of the connection pin (12) is smaller than the length of the bar-shaped hole (34).
6. Boom structure according to claim 5, characterized in that the rigid connection piece (30) comprises a fork portion (35), the root of the fork portion (35) being connected to the end of the first horizontal portion (31) remote from the inclined portion (32), the U-shaped fork portion of the fork portion (35) being coaxially clamped around the swivel elbow (22).
7. Boom structure according to claim 6, characterized in that the root of the fork part (35) is connected to the first horizontal part (31) by means of a bolt (36), the U-shaped fork part of the fork part (35) being welded to the swivel elbow (22).
8. Boom structure according to any of claims 1-7, characterized in that the horizontal pipe section (21) and the swivel elbow (22) are connected by a hose (23), the length of the hose (23) being larger than the connection distance between the horizontal pipe section (21) and the swivel elbow (22).
9. A working device, characterized in that it comprises a boom structure according to any of claims 1-8.
10. The work device of claim 9, wherein the work device is a fire truck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911219512.6A CN110917544B (en) | 2019-12-03 | 2019-12-03 | Arm support structure and operation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911219512.6A CN110917544B (en) | 2019-12-03 | 2019-12-03 | Arm support structure and operation equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110917544A CN110917544A (en) | 2020-03-27 |
| CN110917544B true CN110917544B (en) | 2024-05-07 |
Family
ID=69848560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911219512.6A Active CN110917544B (en) | 2019-12-03 | 2019-12-03 | Arm support structure and operation equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110917544B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0648692A (en) * | 1992-07-24 | 1994-02-22 | Komatsu Ltd | Bending type elevated spot work vehicle |
| CN201857758U (en) * | 2010-07-29 | 2011-06-08 | 三一重工股份有限公司 | Delivery pipe supporting device and concreting machinery employing same |
| CN202139858U (en) * | 2011-06-28 | 2012-02-08 | 三一重工股份有限公司 | Jib system and concrete pump vehicle provided with jib system |
| CN102500082A (en) * | 2011-11-18 | 2012-06-20 | 长沙中联消防机械有限公司 | Water pipeline connecting structure for fire truck and fire truck with same |
| CN102827978A (en) * | 2012-09-04 | 2012-12-19 | 无锡市长江液压缸厂 | Hydraulic pipeline connection structure of hydraulic mud gun |
| CN103486370A (en) * | 2013-09-30 | 2014-01-01 | 张胜虎 | Rotating joint, loading arm with rotating joint and loading equipment with loading arm |
| CN203441114U (en) * | 2013-08-09 | 2014-02-19 | 北汽福田汽车股份有限公司 | Material distribution arm support system and material distribution equipment |
| CN104555877A (en) * | 2014-12-30 | 2015-04-29 | 芜湖市金宇石化设备有限公司 | Rotating arm crane pipe for loading hydrochloric acid |
| CN110258256A (en) * | 2019-07-18 | 2019-09-20 | 山东大山路桥工程有限公司 | A kind of spray arm of rotary joint and vehicle-mounted spread equipment |
| CN211486321U (en) * | 2019-12-03 | 2020-09-15 | 长沙中联消防机械有限公司 | Boom structure and operation equipment |
-
2019
- 2019-12-03 CN CN201911219512.6A patent/CN110917544B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0648692A (en) * | 1992-07-24 | 1994-02-22 | Komatsu Ltd | Bending type elevated spot work vehicle |
| CN201857758U (en) * | 2010-07-29 | 2011-06-08 | 三一重工股份有限公司 | Delivery pipe supporting device and concreting machinery employing same |
| CN202139858U (en) * | 2011-06-28 | 2012-02-08 | 三一重工股份有限公司 | Jib system and concrete pump vehicle provided with jib system |
| CN102500082A (en) * | 2011-11-18 | 2012-06-20 | 长沙中联消防机械有限公司 | Water pipeline connecting structure for fire truck and fire truck with same |
| CN102827978A (en) * | 2012-09-04 | 2012-12-19 | 无锡市长江液压缸厂 | Hydraulic pipeline connection structure of hydraulic mud gun |
| CN203441114U (en) * | 2013-08-09 | 2014-02-19 | 北汽福田汽车股份有限公司 | Material distribution arm support system and material distribution equipment |
| CN103486370A (en) * | 2013-09-30 | 2014-01-01 | 张胜虎 | Rotating joint, loading arm with rotating joint and loading equipment with loading arm |
| CN104555877A (en) * | 2014-12-30 | 2015-04-29 | 芜湖市金宇石化设备有限公司 | Rotating arm crane pipe for loading hydrochloric acid |
| CN110258256A (en) * | 2019-07-18 | 2019-09-20 | 山东大山路桥工程有限公司 | A kind of spray arm of rotary joint and vehicle-mounted spread equipment |
| CN211486321U (en) * | 2019-12-03 | 2020-09-15 | 长沙中联消防机械有限公司 | Boom structure and operation equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110917544A (en) | 2020-03-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2455224C2 (en) | System to transfer natural liquefied gas from inshore tanker to floating or stationary storage | |
| CN105586972B (en) | A kind of concrete spraying vehicle | |
| CN110917544B (en) | Arm support structure and operation equipment | |
| CN211486321U (en) | Boom structure and operation equipment | |
| WO2012013105A1 (en) | Supporting device for delivery pipe and concrete machinery with the same | |
| CN202324643U (en) | Multifunctional concrete pump truck | |
| CN102500082A (en) | Water pipeline connecting structure for fire truck and fire truck with same | |
| CN105317220B (en) | Material conveyance hose protecting device, distributing mechanism and concrete pumping equipment | |
| CN205399432U (en) | Concrete shotcrete vehicle | |
| US20230219792A1 (en) | Mobile telescopic hydraulic crane | |
| CN110961769A (en) | Pipeline welding protection robot | |
| RU2010119638A (en) | DISPOSAL OF RESIDUAL CONCRETE FROM CYLINDRICAL CONTAINERS FOR READY-MIXED CONCRETE CONCRETE | |
| CN102671826A (en) | Internal spraying device for steel pipe | |
| CN212715965U (en) | Pipeline structure, cantilever crane conveyor and material conveying equipment | |
| CN201133758Y (en) | Railway tank wagon blower | |
| CN218720603U (en) | Vehicle filling device for compressing hydrogen | |
| CN206857874U (en) | A kind of winding mechanism | |
| CN210764295U (en) | Fine-adjustment joint for crane pipe | |
| JP2002135932A (en) | Pipe connecting device, and pipe connecting method | |
| CN214942514U (en) | Full-automatic material distributing machine | |
| CN110465020B (en) | Fire engine | |
| CN220151533U (en) | Emulsion pump unloading loop and emulsion pump system | |
| CN111039213A (en) | Protection device for pipeline inspection | |
| CN214812004U (en) | Centrifugal spraying device for in-situ repair of pipeline | |
| CN221014305U (en) | Swing arm support device and fire-fighting vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 410200 No. 997, Section 2, Tengfei Road, Wangcheng District, Changsha City, Hunan Province Applicant after: Hunan Zoomlion emergency equipment Co.,Ltd. Address before: 410200 No. 997, Jinxing Road, Wangcheng District, Changsha City, Hunan Province Applicant before: Changsha Zhonglian Fire-Fighting Machinery Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |