CN221388719U - Anchor net overlap joint crotch device - Google Patents
Anchor net overlap joint crotch device Download PDFInfo
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- CN221388719U CN221388719U CN202323130449.3U CN202323130449U CN221388719U CN 221388719 U CN221388719 U CN 221388719U CN 202323130449 U CN202323130449 U CN 202323130449U CN 221388719 U CN221388719 U CN 221388719U
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- 230000005540 biological transmission Effects 0.000 claims abstract description 32
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims description 19
- 239000003245 coal Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007306 turnover Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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Abstract
The utility model discloses an anchor net overlap-joint hook device, and relates to the technical field of coal mine production. This anchor net overlap joint crotch device includes: the hydraulic operating mechanism is used for carrying out lap joint treatment on the anchor net; the hydraulic transmission mechanism is arranged on one side of the hydraulic operation mechanism, the input end of the hydraulic operation mechanism is communicated with the input end of the hydraulic transmission mechanism, and the hydraulic transmission mechanism is used for transmitting hydraulic oil so as to drive the hydraulic operation mechanism to operate; the hydraulic control mechanism is arranged at one end of the hydraulic transmission mechanism, and the input end of the hydraulic transmission mechanism is communicated with the output end of the hydraulic control mechanism.
Description
Technical Field
The utility model relates to the technical field of coal mine production, in particular to an anchor net lap-joint hook device.
Background
During the tunneling of coal mine, roadway support needs to be carried out, when the anchor net support is utilized, the nets are subjected to hook connection, the connection quality of the anchor net directly influences the support quality of the roadway, however, the hook connection of the roadway nets is a common connection mode, and is particularly suitable for various meshes used in roadway support, the connection mode mainly hooks the edges of two meshes together through steel bars or steel wires to form a firm integral structure, and attention needs to be paid to ensure that the length of the steel wires or steel bars is enough to ensure the connection firmness when the hook connection is carried out, and in addition, the connection part needs to be subjected to sufficient inspection and test to ensure the connection firmness and stability.
But traditional connected mode adopts pliers to carry out the crotch to anchor net one by one for the manual work and connects, and efficiency is slower, and the crotch angle is little, so we have provided an anchor net overlap joint crotch device and solved the problem that above-mentioned exists.
Disclosure of utility model
Aiming at the defects of the prior art, the utility model provides an anchor net overlap joint hook device, which solves the problems that the traditional connection mode adopts pliers to carry out hook connection on anchor nets one by one, the efficiency is slower and the hook angle is small.
In order to achieve the above purpose, the utility model is realized by the following technical scheme: an anchor net overlap hook device comprising:
The hydraulic operating mechanism is used for carrying out lap joint treatment on the anchor net;
The hydraulic transmission mechanism is arranged on one side of the hydraulic operation mechanism, the input end of the hydraulic operation mechanism is communicated with the input end of the hydraulic transmission mechanism, and the hydraulic transmission mechanism is used for transmitting hydraulic oil so as to drive the hydraulic operation mechanism to operate; and
The hydraulic control mechanism is arranged at one end of the hydraulic transmission mechanism, the input end of the hydraulic transmission mechanism is communicated with the output end of the hydraulic control mechanism, and the hydraulic control mechanism is used for conveying hydraulic oil to the hydraulic transmission mechanism.
Preferably, the hydraulic operating mechanism comprises a supporting frame, a plurality of through holes are formed in the top surface of the supporting frame, and clamping parts are arranged in the inner cavities of the through holes.
Preferably, the clamping part comprises a hollow pipe arranged in the through hole inner cavity, the bottom end of the hollow pipe is embedded and connected with a liquid guide pipe, the bottom end of the liquid guide pipe is communicated and connected with the output end of the hydraulic transmission mechanism, and the hollow pipe inner cavity is movably inserted with a piston rod;
a shaft seal is arranged at the open end of the top of the cavity of the hollow tube, and the middle part of the shaft seal is connected with the piston rod in an inserting way;
The piston rod top is fixedly provided with the holder, the holder top is provided with the jack catch to the jack catch bottom with the cavity pipe outer wall links to each other.
Preferably, the hydraulic operating mechanism further comprises a handle sleeve, and the handle sleeve is arranged at the middle position of the bottom of the supporting frame.
Preferably, the hydraulic transmission mechanism comprises a shunt tube, the input end of the shunt tube is connected with the output end of the hydraulic control mechanism, a plurality of high-pressure rubber tubes are installed at the output end of the shunt tube, and each high-pressure rubber tube is respectively connected with the bottom end of the liquid guide tube in each clamping part in a conducting mode.
Preferably, the hydraulic transmission mechanism further comprises a plurality of overflow valves, and each overflow valve is connected in series with the middle part of each high-pressure rubber pipe.
Preferably, the hydraulic control mechanism comprises a pneumatic hydraulic pump, an air inlet pipe is arranged at the input end of the pneumatic hydraulic pump, a liquid outlet pipe is arranged at the output end of the pneumatic hydraulic pump, and one end of the liquid outlet pipe is communicated with the input end of the shunt pipe;
the middle part of the liquid outlet pipe is connected with a pressure gauge in series.
Preferably, the device further comprises a cart, wherein the cart is arranged on the bottom surface of the hydraulic control mechanism, and the cart is used for carrying the hydraulic control mechanism to move.
Advantageous effects
The utility model provides an anchor net lap-joint hook device. Compared with the prior art, the method has the following beneficial effects:
This anchor net overlap joint crotch device, before need carrying out the crotch to anchor net overlap joint department and connect, this moment through hydraulic control mechanism, connect the high-pressure air pipe in the pit earlier, thereby can make the work of pneumatic drive hydraulic control mechanism, and then can realize pneumatic from hydraulic conversion, then rethread hydraulic drive mechanism, can link to each other hydraulic control mechanism and hydraulic operating mechanism, and then can make hydraulic control mechanism provide hydraulic oil to hydraulic operating mechanism, when need carry out the crotch to anchor net overlap joint department, earlier with hydraulic operating mechanism block in net crotch junction this moment, then through hydraulic control mechanism, can drive hydraulic operating mechanism operation, thereby can be quick carry out net crotch connection, can solve anchor net connection problem not in place, and again can be hooked a plurality of, work efficiency has been effectively improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic view of the hydraulic operating mechanism of the present utility model;
FIG. 3 is a schematic cross-sectional view of a clamping portion according to the present utility model;
FIG. 4 is a schematic view of a hydraulic transmission mechanism according to the present utility model;
fig. 5 is a schematic structural view of the hydraulic control mechanism of the present utility model.
In the figure: 1. a hydraulic operating mechanism; 11. a support frame; 12. a through hole; 13. a clamping part; 131. a hollow tube; 132. a catheter; 133. a piston rod; 134. a shaft seal; 135. a clamping seat; 136. a claw; 14. a handle sleeve; 2. a hydraulic transmission mechanism; 21. a shunt; 22. a high pressure hose; 23. an overflow valve; 3. a hydraulic control mechanism; 31. a pneumatic hydraulic pump; 32. an air inlet pipe; 33. a liquid outlet pipe; 34. a pressure gauge; 4. and (5) pushing the cart.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, the present utility model provides a technical solution: an anchor net overlap hook device comprising: the hydraulic operation mechanism 1 is used for carrying out lap joint treatment on the anchor net; the hydraulic transmission mechanism 2 is arranged on one side of the hydraulic operation mechanism 1, the input end of the hydraulic operation mechanism 1 is communicated with the input end of the hydraulic transmission mechanism 2, and the hydraulic transmission mechanism 2 is used for transmitting hydraulic oil so as to drive the hydraulic operation mechanism 1 to operate; the hydraulic control mechanism 3 is arranged at one end of the hydraulic transmission mechanism 2, the input end of the hydraulic transmission mechanism 2 is communicated with the output end of the hydraulic control mechanism 3, and the hydraulic control mechanism 3 is used for conveying hydraulic oil to the hydraulic transmission mechanism 2;
Before the hook connection is carried out on the anchor net lap joint, at this moment, the underground high-pressure air pipe is connected firstly through the hydraulic control mechanism 3, so that the pneumatic driving hydraulic control mechanism 3 works, further the pneumatic conversion from hydraulic pressure can be realized, then the hydraulic control mechanism 3 is connected with the hydraulic operating mechanism 1 through the hydraulic transmission mechanism 2, and then the hydraulic control mechanism 3 can provide hydraulic oil for the hydraulic operating mechanism 1, when the hook connection is carried out on the anchor net lap joint, the hydraulic operating mechanism 1 is clamped at the net hook connection at this moment, then the hydraulic operating mechanism 1 can be driven to operate through the hydraulic control mechanism 3, thereby the net hook connection can be carried out rapidly, the problem that the anchor net connection is not in place can be solved, and a plurality of hooks can be formed again, and the work efficiency is effectively improved.
Referring to fig. 1-3, a hydraulic operating mechanism 1 comprises a supporting frame 11, a plurality of through holes 12 are formed in the top surface of the supporting frame 11, clamping parts 13 are arranged in the inner cavity of each through hole 12, each clamping part 13 comprises a hollow tube 131 arranged in the inner cavity of each through hole 12, a liquid guide tube 132 is connected to the bottom end of each hollow tube 131 in an embedded mode, the bottom end of each liquid guide tube 132 is connected with the output end of a hydraulic transmission mechanism 2 in a conducting mode, and a piston rod 133 is movably inserted into the inner cavity of each hollow tube 131; the top opening end of the inner cavity of the hollow tube 131 is provided with a shaft seal 134, and the middle part of the shaft seal 134 is connected with a piston rod 133 in an inserting way; the top end of the piston rod 133 is fixedly provided with a clamping seat 135, a clamping jaw 136 is arranged above the clamping seat 135, the bottom end of the clamping jaw 136 is connected with the outer wall of the hollow tube 131, the hydraulic operating mechanism 1 further comprises a handle sleeve 14, and the handle sleeve 14 is arranged at the middle position of the bottom of the supporting frame 11;
Through the braced frame 11 in the hydraulic operating mechanism 1, can be through the hollow tube 131 installation fixed on a plurality of clamping parts 13 of a plurality of through-holes 12, can provide the support to every hollow tube 131 after the installation again, simultaneously can be again to the fixed installation of handle cover 14, then through handle cover 14, can make things convenient for the staff to hold braced frame 11, when needing to be connected to net crotch, this moment through hollow tube 131, can lead pipe 132 and hydraulic drive mechanism 2 output to switch on continuously, thereby can make things convenient for hydraulic oil business turn over hollow tube 131, owing to hollow tube 131 inner chamber activity grafting has piston rod 133, and piston rod 133 middle part passes through shaft seal 134 and hollow tube 131 inner chamber open end links to each other, piston rod 133 top is fixed simultaneously and is provided with clamping seat 135, and clamping seat 135 top installs jack catch 136, so when hydraulic oil that hydraulic drive mechanism 2 carried over the time gets into inside hollow tube 131 through pipe guide 132, thereby can make hydraulic pressure promote piston rod 133 upwards movement again, and then can make piston rod 133 carry out clamping seat 135 to the movement to the jack catch 136, so that can make things convenient for the clamping seat 135 and the net crotch 136 to take out the clamping mechanism to the clamping position to the quick, can not be fixed to the hollow tube 131 again, thereby the problem can be solved, and the hydraulic pressure can be fixed, and the work can be carried down by the clamping mechanism can be more than the clamping mechanism is convenient, and the clamping mechanism is further can be fixed.
Referring to fig. 1-4, the hydraulic transmission mechanism 2 comprises a shunt tube 21, the input end of the shunt tube 21 is connected with the output end of the hydraulic control mechanism 3, a plurality of high-pressure rubber tubes 22 are installed at the output end of the shunt tube 21, each high-pressure rubber tube 22 is respectively connected with the bottom end of a liquid guide tube 132 in each clamping part 13 in a conducting manner, the hydraulic transmission mechanism 2 further comprises overflow valves 23, the overflow valves 23 are provided in a plurality, and each overflow valve 23 is respectively connected in series with the middle part of each high-pressure rubber tube 22;
through shunt tubes 21 in hydraulic drive mechanism 2, can link to each other with hydraulic control mechanism 3 output, can lead to the pipe 132 in each clamping part 13 through a plurality of high-pressure rubber tubes 22 again to can circulate the hydraulic oil that hydraulic control mechanism 3 carried to the pipe 132 department, because each high-pressure rubber tube 22 has all concatenated overflow valve 23, can keep the pressure in the high-pressure rubber tube 22, thereby can make the pressure in the high-pressure rubber tube 22 stable, and when the pressure in the high-pressure rubber tube 22 exceeded certain scope, overflow valve 23 can reduce the flow, ensure that the pressure in the high-pressure rubber tube 22 can not exceed the regulation scope, thereby can not cause the emergence of accident.
Referring to fig. 4 and 5, the hydraulic control mechanism 3 includes a pneumatic hydraulic pump 31, an air inlet pipe 32 is installed at the input end of the pneumatic hydraulic pump 31, a liquid outlet pipe 33 is installed at the output end of the pneumatic hydraulic pump 31, and one end of the liquid outlet pipe 33 is connected with the input end of the shunt pipe 21 in a conducting manner; the middle part of the liquid outlet pipe 33 is connected in series with a pressure gauge 34;
Through the pneumatic hydraulic pump 31 in the hydraulic control mechanism 3, can connect the underground high-pressure air pipe through the intake pipe 32 to can promote pneumatic hydraulic pump 31 work through atmospheric pressure, and then can realize pneumatic from hydraulic conversion, so that can make the hydraulic oil in the pneumatic hydraulic pump 31 flow into shunt tubes 21 from drain pipe 33, and then can reach in each hollow tube 131, because the drain pipe 33 middle part has concatenated manometer 34, so can make things convenient for the staff to look over the pressure of drain pipe 33 outflow hydraulic oil, and then can the safety of equipment use.
Referring to fig. 1, the device further comprises a cart 4, wherein the cart 4 is arranged on the bottom surface of the hydraulic control mechanism 3, and through the cart 4, not only can the hydraulic control mechanism 3 be provided with an installation foundation, but also the device can be moved by carrying the hydraulic control mechanism 3, so that convenience of equipment use can be facilitated.
During operation, before the crotch is connected to anchor net overlap joint, this moment is through hydraulic control mechanism 3, connect the underground high-pressure air pipe earlier, thereby can make the work of pneumatic drive hydraulic control mechanism 3, and then can realize pneumatic follow hydraulic conversion, then rethread hydraulic drive mechanism 2, can link to each other hydraulic control mechanism 3 and hydraulic operating mechanism 1, and then can make hydraulic control mechanism 3 provide hydraulic oil to hydraulic operating mechanism 1, when the crotch is connected to anchor net overlap joint to needs, earlier with hydraulic operating mechanism 1 block in net crotch junction this moment, then through hydraulic control mechanism 3, can drive hydraulic operating mechanism 1 operation, thereby can be quick carry out net crotch connection, can solve anchor net connection problem not put in place, and again can be a plurality of hooks, work efficiency has effectively been improved.
Through the braced frame 11 in the hydraulic operating mechanism 1, can be through the hollow tube 131 installation fixed on a plurality of clamping parts 13 of a plurality of through-holes 12, can provide the support to every hollow tube 131 after the installation again, simultaneously can be again to the fixed installation of handle cover 14, then through handle cover 14, can make things convenient for the staff to hold braced frame 11, when needing to be connected to net crotch, this moment through hollow tube 131, can lead pipe 132 and hydraulic drive mechanism 2 output to switch on continuously, thereby can make things convenient for hydraulic oil business turn over hollow tube 131, owing to hollow tube 131 inner chamber activity grafting has piston rod 133, and piston rod 133 middle part passes through shaft seal 134 and hollow tube 131 inner chamber open end links to each other, piston rod 133 top is fixed simultaneously and is provided with clamping seat 135, and clamping seat 135 top installs jack catch 136, so when hydraulic oil that hydraulic drive mechanism 2 carried over the time gets into inside hollow tube 131 through pipe guide 132, thereby can make hydraulic pressure promote piston rod 133 upwards movement again, and then can make piston rod 133 carry out clamping seat 135 to the movement to the jack catch 136, so that can make things convenient for the clamping seat 135 and the net crotch 136 to take out the clamping mechanism to the clamping position to the quick, can not be fixed to the hollow tube 131 again, thereby the problem can be solved, and the hydraulic pressure can be fixed, and the work can be carried down by the clamping mechanism can be more than the clamping mechanism is convenient, and the clamping mechanism is further can be fixed.
Through shunt tubes 21 in hydraulic drive mechanism 2, can link to each other with hydraulic control mechanism 3 output, can lead to the pipe 132 in each clamping part 13 through a plurality of high-pressure rubber tubes 22 again to can circulate the hydraulic oil that hydraulic control mechanism 3 carried to the pipe 132 department, because each high-pressure rubber tube 22 has all concatenated overflow valve 23, can keep the pressure in the high-pressure rubber tube 22, thereby can make the pressure in the high-pressure rubber tube 22 stable, and when the pressure in the high-pressure rubber tube 22 exceeded certain scope, overflow valve 23 can reduce the flow, ensure that the pressure in the high-pressure rubber tube 22 can not exceed the regulation scope, thereby can not cause the emergence of accident.
Through the pneumatic hydraulic pump 31 in the hydraulic control mechanism 3, can connect the underground high-pressure air pipe through intake pipe 32, thereby can promote pneumatic hydraulic pump 31 work through atmospheric pressure, and then can realize pneumatic follow hydraulic conversion, so that can make the hydraulic oil in the pneumatic hydraulic pump 31 follow drain pipe 33 flow into shunt tubes 21, and then can reach in each hollow tube 131, owing to the drain pipe 33 middle part has concatenated manometer 34, so can make things convenient for the staff to look over the pressure of drain pipe 33 outflow hydraulic oil, and then can the safety of equipment use, through shallow 4, can provide the installation basis to hydraulic control mechanism 3, can carry hydraulic control mechanism 3 to remove again, and then can make things convenient for the convenience of equipment use.
In conclusion, the device can be operated by using pneumatic driving equipment, so that net hook connection can be rapidly carried out, the problem that an anchor net is not connected in place can be solved, a plurality of hooks can be hooked once, and the working efficiency is effectively improved.
And all that is not described in detail in this specification is well known to those skilled in the art.
Claims (8)
1. An anchor net overlap joint crotch device, its characterized in that: comprising the following steps:
the hydraulic operation mechanism (1) is used for carrying out lap joint treatment on the anchor net;
The hydraulic transmission mechanism (2) is arranged on one side of the hydraulic operation mechanism (1), the input end of the hydraulic operation mechanism (1) is communicated with the input end of the hydraulic transmission mechanism (2), and the hydraulic transmission mechanism (2) is used for transmitting hydraulic oil so as to drive the hydraulic operation mechanism (1) to run; and
The hydraulic control mechanism (3), hydraulic control mechanism (3) set up in hydraulic drive mechanism (2) one end, and hydraulic drive mechanism (2) input with hydraulic control mechanism (3) output switches on and links to each other, hydraulic control mechanism (3) are used for carrying hydraulic oil to hydraulic drive mechanism (2).
2. An anchor net overlap hook device according to claim 1, wherein: the hydraulic operating mechanism (1) comprises a supporting frame (11), a plurality of through holes (12) are formed in the top surface of the supporting frame (11), and clamping portions (13) are arranged in the inner cavity of each through hole (12).
3. An anchor net overlap hook device according to claim 2, wherein: the clamping part (13) comprises a hollow tube (131) arranged in the inner cavity of the through hole (12), a liquid guide tube (132) is embedded and connected at the bottom end of the hollow tube (131), the bottom end of the liquid guide tube (132) is communicated and connected with the output end of the hydraulic transmission mechanism (2), and a piston rod (133) is movably inserted in the inner cavity of the hollow tube (131);
A shaft seal (134) is arranged at the open end of the top of the inner cavity of the hollow tube (131), and the middle part of the shaft seal (134) is connected with the piston rod (133) in an inserting way;
The top end of the piston rod (133) is fixedly provided with a clamping seat (135), a clamping jaw (136) is arranged above the clamping seat (135), and the bottom end of the clamping jaw (136) is connected with the outer wall of the hollow tube (131).
4. An anchor net overlap hook device according to claim 2, wherein: the hydraulic operating mechanism (1) further comprises a handle sleeve (14), and the handle sleeve (14) is arranged at the middle position of the bottom of the supporting frame (11).
5. An anchor net overlap hook device according to claim 3, wherein: the hydraulic transmission mechanism (2) comprises a shunt tube (21), the input end of the shunt tube (21) is connected with the output end of the hydraulic control mechanism (3), a plurality of high-pressure rubber tubes (22) are arranged at the output end of the shunt tube (21), and each high-pressure rubber tube (22) is respectively connected with the bottom end of a liquid guide tube (132) in each clamping part (13) in a conducting mode.
6. An anchor net overlap hook device according to claim 5, wherein: the hydraulic transmission mechanism (2) further comprises overflow valves (23), a plurality of overflow valves (23) are arranged, and each overflow valve (23) is respectively connected in series with the middle of each high-pressure rubber tube (22).
7. An anchor net overlap hook device according to claim 5, wherein: the hydraulic control mechanism (3) comprises a pneumatic hydraulic pump (31), an air inlet pipe (32) is arranged at the input end of the pneumatic hydraulic pump (31), a liquid outlet pipe (33) is arranged at the output end of the pneumatic hydraulic pump (31), and one end of the liquid outlet pipe (33) is connected with the input end of the shunt pipe (21) in a conducting way;
The middle part of the liquid outlet pipe (33) is connected with a pressure gauge (34) in series.
8. An anchor net overlap hook device according to claim 1, wherein: the trolley (4) is arranged on the bottom surface of the hydraulic control mechanism (3), and the trolley (4) is used for carrying the hydraulic control mechanism (3) to move.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323130449.3U CN221388719U (en) | 2023-11-20 | 2023-11-20 | Anchor net overlap joint crotch device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323130449.3U CN221388719U (en) | 2023-11-20 | 2023-11-20 | Anchor net overlap joint crotch device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221388719U true CN221388719U (en) | 2024-07-23 |
Family
ID=91943690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323130449.3U Active CN221388719U (en) | 2023-11-20 | 2023-11-20 | Anchor net overlap joint crotch device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221388719U (en) |
-
2023
- 2023-11-20 CN CN202323130449.3U patent/CN221388719U/en active Active
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