CN210368619U - Expansion device for bridge and bridge - Google Patents
Expansion device for bridge and bridge Download PDFInfo
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- CN210368619U CN210368619U CN201920889674.XU CN201920889674U CN210368619U CN 210368619 U CN210368619 U CN 210368619U CN 201920889674 U CN201920889674 U CN 201920889674U CN 210368619 U CN210368619 U CN 210368619U
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Abstract
The utility model discloses a telescopic device used in a bridge, which comprises two fixed steel plates arranged at intervals and a water stop strip connected between the two fixed steel plates; the water stop strip comprises a U-shaped main body with a U-shaped groove, and a connecting flange extends from the top of the U-shaped main body; a pressing plate is arranged on each fixed steel plate, and each connecting flanging is fastened between the pressing plate and the fixed steel plate respectively; and water retaining raised edges are respectively arranged at two ends of the U-shaped main body. The utility model also discloses a bridge. The utility model discloses a telescoping device and bridge, through being provided with the manger plate respectively at the both ends of U type main part and sticking up the limit for the tip in shutoff U type groove can avoid the rainwater to flow from the both ends in U type groove, can only flow from appointed route after the open-top in U type groove is walked over to the rainwater, thereby does benefit to the water conservancy diversion and maintains the bridge.
Description
Technical Field
The utility model relates to a bridge builds technical field, especially relates to a telescoping device and bridge for in bridge.
Background
In order to meet the requirement of deformation of the bridge body, gaps are reserved between the bridge beam ends, so that accumulated water and sundries mixed with the accumulated water enter the bridge floor through the beam gaps, the bridge body, supports and other facilities are corroded, the stability of the bridge is damaged, and the durability of the bridge is influenced. In order to solve the problems, a bridge expansion device is arranged between bridge beam joints in the industry, so that accumulated water and sundries mixed with the accumulated water are prevented from entering the bridge floor to influence the bridge. The bridge expansion device is an important connecting part between bridge beam ends, plays an important role in expansion and contraction of bridge end parts and waterproof performance, and directly influences the durability of a bridge due to the quality and the waterproof performance of the bridge expansion device.
The sealing rod both ends among the bridge telescoping device that uses now do not set up the breakwater, when the rainwater got into in the recess of sealing rod, can flow along the recess, lead to the rainwater can not follow appointed route and flow, be unfavorable for the water conservancy diversion and maintain the bridge.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can avoid the rainwater to flow from the both ends of sealing rod, do benefit to the telescoping device and the bridge of water conservancy diversion and maintenance bridge.
The technical scheme of the utility model provides a telescopic device used in a bridge, which comprises two fixed steel plates arranged at intervals and a water stop strip connected between the two fixed steel plates;
at least one anchoring steel bar is arranged on the outer side of each fixed steel plate;
the water stop strip comprises a U-shaped main body with a U-shaped groove, and connecting flanges extend from the top of the U-shaped main body towards the sides of the fixed steel plates on the two sides respectively;
a pressing plate is arranged on each fixed steel plate, and each connecting flanging is fastened between the pressing plate and the fixed steel plate respectively;
the pressing plate, the connecting flanging and the fixed steel plate on each side are fastened together through connecting bolts;
the two ends of the U-shaped main body are respectively provided with a water-retaining raised edge for plugging the U-shaped groove;
the lower end of the water retaining warped edge is connected to the bottom of the U-shaped groove, and the upper end of the water retaining warped edge extends out of the upper portion of the U-shaped main body.
Further, the water blocking raised edge and the U-shaped main body are integrally formed.
Furthermore, both sides of the water retaining raised edge extend towards the direction of the fixed steel plate to form raised edge flanges;
the edge raising flanging is in close contact with the end parts of the pressing plate and the fixed steel plate.
Furthermore, two ends of the U-shaped main body along the length direction are respectively provided with a main body connecting end;
the main body connecting end extends out of the outer side of the fixed steel plate;
the U-shaped groove is arranged between the connecting ends of the main bodies at the two ends;
a main body connecting tip part is arranged at one end of the main body connecting end, which is far away from the fixed steel plate;
the main body connecting end is provided with main body connecting end bevel edges at two sides of the U-shaped groove respectively, and the main body connecting end bevel edges extend upwards in an inclined mode along the direction from the main body connecting tip end to the fixed steel plate;
the water-retaining raised edge comprises a raised edge main body and a raised edge connecting tip end connected to the bottom of the raised edge main body;
the raised edge connecting tip part and the main body connecting tip part are integrally formed, and the upper end of the raised edge main body extends out of the upper part of the pressing plate;
two sides of the warped edge main body are respectively provided with a warped edge main body bevel edge which is used for being in butt joint with the bevel edge of the connecting end of the main body;
two stick up limit main part hypotenuse respectively with two the main part link hypotenuse corresponds and is connected.
Further, the raised edge main body is provided with a main body groove, and a notch of the main body groove faces the U-shaped groove side.
Furthermore, a rubber sealing strip is arranged between the fixed steel plate and the connecting flanging.
Furthermore, the top surface of the fixed steel plate is provided with an installation plane, and a baffle is arranged on the top surface of the fixed steel plate and positioned outside the installation plane;
the rubber sealing strip is installed on the installation plane, and the end part of the connecting flanging and the end part of the pressing plate are respectively contacted with the baffle.
Further, the baffle is integrally formed on the top surface of the fixed steel plate.
Further, the connecting flange and the U-shaped main body are integrally formed.
The technical scheme of the utility model also provides a bridge, which comprises two sections of beam bodies arranged at intervals, and a gap is formed between the two sections of beam bodies;
concrete layers are respectively poured above each section of the beam body;
the bridge also comprises a telescopic device used in the bridge in any one of the technical schemes;
two fixed steel plates in the telescopic device are respectively anchored in the concrete layers on two sides through the anchoring steel bars;
the U-shaped main body is positioned in the gap;
transverse supporting steel bars are arranged in the concrete layer along the horizontal direction, and the transverse supporting steel bars are supported below the anchoring steel bars;
still be provided with the vertical spacing reinforcing bar that extends along the vertical direction in the concrete layer, vertical spacing reinforcing bar is located one side of anchor reinforcing bar, and with anchor reinforcing bar contact.
By adopting the technical scheme, the method has the following beneficial effects:
the utility model provides a telescoping device and bridge, through be provided with the manger plate respectively at the both ends of U type main part and stick up the limit for the tip in shutoff U type groove can avoid the rainwater to flow from the both ends in U type groove, can only flow from appointed route after the open-top in U type groove is walked over to the rainwater, thereby does benefit to the water conservancy diversion and maintains the bridge.
Drawings
Fig. 1 is a perspective view of a telescopic device provided by the present invention;
FIG. 2 is a cross-sectional view of the telescoping device shown in FIG. 1;
FIG. 3 is a cross-sectional view of a check rod;
FIG. 4 is a top view of a gasket;
FIG. 5 is a perspective view of a water retaining raised edge;
FIG. 6 is an exploded view of a water stop raised edge and a water stop;
FIG. 7 is a schematic view of a manufacturing board for a stop-cock and a water-blocking raised edge;
FIG. 8 is a partial enlarged view of the connection of the pressing plate, the fixing steel plate, the connecting flange and the rubber sealing strip;
FIG. 9 is a cross-sectional view of a stationary steel plate;
fig. 10 is a top view of a bridge according to an embodiment of the present invention;
fig. 11 is a cross-sectional view of the bridge shown in fig. 10.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1-5, an embodiment of the present invention provides a telescopic device for a bridge, which includes two fixed steel plates 1 arranged at intervals and a water stop bar 2 connected between the two fixed steel plates 1.
At least one anchoring steel bar 3 is respectively arranged on the outer side of each fixed steel plate 1.
The water stop strip 2 comprises a U-shaped main body 21 with a U-shaped groove 20, and connecting flanges 22 respectively extend from the top of the U-shaped main body 21 towards the sides of the fixing steel plates 1 on the two sides.
A pressing plate 4 is arranged on each fixed steel plate 1, and each connecting flanging 22 is fastened between the pressing plate 4 and the fixed steel plate 1 respectively.
The pressing plate 4, the connecting flange 22 and the fixing steel plate 1 on each side are fastened together by the connecting bolt 5.
Wherein, both ends of the U-shaped main body 21 are respectively provided with a water-retaining raised edge 24 for plugging the U-shaped groove 20.
The lower end of the water-retaining raised edge 24 is connected to the bottom of the U-shaped groove 20, and the upper end of the water-retaining raised edge 24 extends out of the upper part of the U-shaped main body 21.
The water stop 2 is a water stop for retaining water in bridge design, and can be a metal water stop, such as a steel strip water stop, a brass water stop, or an aluminum strip water stop. The water stop strip can also adopt a polyurethane water stop strip.
The utility model provides a water stop strip's middle part has kink or U type groove 20, from this, when the bridge is flexible, this kink or U type groove 20 can be corresponding the flexible of emergence deformation in order to adapt to the bridge.
The fixed steel plates 1 are in a long strip shape, and the two fixed steel plates 1 are arranged at intervals to form a certain gap between the two fixed steel plates.
A pressing plate 4 is attached to the upper surface of the fixed steel plate 1 by a connecting bolt 5. The outside of fixed steel sheet 1 is provided with anchor reinforcing bar 3, and it is used for the anchor in the concrete of bridge, realizes firm installation.
The water stop strip 2 comprises a U-shaped body 21 having a U-shaped groove 20, the opening of the U-shaped groove 20 facing upwards. The connecting flanges 22 are connected to both sides of the U-shaped body 21, which extend toward the fixed steel plate 1 side.
During assembly, the connecting flange 22 is pressed against the top surface of the fixed steel plate 1 through the pressing plate 4, and then the pressing plate 4 is fastened to the fixed steel plate 1 through the connecting bolt 5, so that the connecting flange 22 is fastened between the fixed steel plate 1 and the pressing plate 4.
In the length direction along U type main part 21, the both ends of U type main part 21 have the manger plate respectively and stick up limit 24, and manger plate sticks up limit 24 and is used for shutoff U type groove 20, avoids water to flow out from the both ends of U type groove 20.
During connection, the water blocking raised edge 24 is integrally formed on the bottom of the U-shaped groove 20, the upper end of the water blocking raised edge 24 extends out of the upper portion of the U-shaped main body 21, and two sides of the water blocking raised edge 24 are sealed on two sides of the U-shaped groove 20 respectively, so that a port of the U-shaped groove 20 can be plugged.
After rainwater enters the U-shaped groove 20 from the upper part, the two end ports of the U-shaped groove 20 are blocked by the water retaining raised edges 24, so that the rainwater cannot flow outwards. When the rainwater level in the U-shaped groove 20 is accumulated to be higher than the pressing plate 4, the rainwater overflows the pressing plate 4 and then flows out through a specified path in the bridge, so that the bridge is favorably guided and maintained.
Preferably, the water blocking raised edge 24 and the U-shaped main body 21 are integrally formed, so that the processing and forming are convenient, the structural strength is improved, and the service life is prolonged.
Preferably, as shown in fig. 1 and 5, two sides of the water blocking raised edge 24 are respectively extended with a raised edge 244 toward the direction of the fixed steel plate 1, and the raised edge 244 is in close contact with the end of the pressing plate 4 and the end of the fixed steel plate 1, so that the U-shaped groove 20 can be sealed. The raised edge flanging 244 and the fixed steel plate 1 can also be connected in a sealing manner, so that the connection stability of the water-retaining raised edge 24, the pressing plate 4 and the fixed steel plate 1 is improved.
Preferably, as shown in fig. 1 and 6-7, the U-shaped body 21 has body connection ends 23 at both ends in the length direction, respectively. The body connection end 23 extends outside the fixed steel plate 1. A U-shaped groove 20 is provided between the body connection ends 23 at both ends.
The main body connection end 23 has a main body connection tip 231 at an end thereof remote from the fixed steel plate 1.
The body connection ends 23 have body connection end inclined sides 232 at both sides of the U-shaped groove 20, respectively, and the body connection end inclined sides 232 extend obliquely upward in a direction from the body connection tip ends 231 to the fixing steel plate 1.
The water blocking turned edge 24 includes a turned edge main body 241 and a turned edge coupling tip portion 242 coupled on the bottom of the turned edge main body 241.
Warped edge connecting tip portion 242 is integrally formed with main body connecting tip portion 231, and the upper end of warped edge main body 241 extends above pressure plate 4.
The two sides of the warped edge main body 241 are respectively provided with warped edge main body oblique edges 243 for butting with the main body connecting end oblique edges 232, and the two warped edge main body oblique edges 243 are respectively in corresponding welding connection with the two main body connecting end oblique edges 232.
So set up, can produce U type main part 21, connect turn-ups 22, main part link 23 and manger plate through a steel sheet and stick up limit 24 to accomplish the preparation of sealing rod 2, improved sealing rod 2's structural strength, make things convenient for the machine-shaping.
The main body connecting end 23 is located at the end of the U-shaped main body 21 along the length direction, and the main body connecting end 23 extends out of the outer side of the fixed steel plate 1, so that the connection with the water blocking raised edge 24 is facilitated. The U-shaped groove 20 communicates between the body connection ends 23 at both ends.
The body coupling tip portion 231 is located at an end away from the fixing steel plate 1 on the body coupling end 23. Body connection end bevel 232 is located on either side of body connection end 23. Two body connection end bevel edges 232 are located on either side of U-shaped channel 20.
Wherein the main body connection end hypotenuse 232 is arranged in the following manner: the body coupling end hypotenuse 232 extends obliquely upward in a direction along from the body coupling tip portion 231 to the fixing steel plate 1.
The water blocking raised edge 24 is mainly composed of a raised edge main body 241 and a raised edge connection tip part 242. Warped edge connecting tip portion 242 is integrally formed at the bottom of warped edge main body 241. Raised edge coupling tip portion 242 is also integrally formed with body coupling tip portion 231 to thereby form water retaining raised edge 24 with U-shaped body 21. The upper end of the raised edge main body 241 extends out of the upper side of the pressing plate 4, so that the function of plugging the port of the U-shaped groove 20 is achieved.
A warped body hypotenuse 243 is provided at both sides of the warped body 241 for interfacing with the body connection end hypotenuse 232. During assembly, the two warped edge main body oblique edges 243 are respectively connected with the two main body connecting end oblique edges 232 in a corresponding welding manner, so that the side part of the U-shaped groove 20 is sealed.
So make the sealing rod 2 that has the manger plate and stick up limit 24 through a steel sheet to can shutoff U type groove 20, avoid the rainwater in U type groove 20 to flow outward from the port, still make things convenient for machine-shaping and improved structural strength, promoted shutoff sealing performance.
Preferably, as shown in fig. 5, the raised edge main body 241 has a main body groove 240, and the notch of the main body groove 240 faces the side of the U-shaped groove 20, so as to improve the structural strength of the water-blocking raised edge 24, and further enable the water-blocking raised edge 24 to be matched with the edge of the U-shaped groove 20, thereby facilitating the subsequent welding connection.
Preferably, as shown in fig. 8, a rubber seal strip 6 is provided between the fixing steel plate 1 and the connecting flange 22. During the equipment, rubber seal strip 6 is installed on the top surface of fixed steel sheet 1, and rubber seal strip 6 seals up between the top surface of fixed steel sheet 1 and connection turn-ups 22, can play sealed effect, can also provide the guard action to connecting turn-ups 22, avoids being damaged because of pressing from both sides tightly.
Preferably, as shown in fig. 8 to 9, the fixing steel plate 1 has a mounting plane 11 on the top surface thereof, and a baffle plate 12 is disposed on the top surface of the fixing steel plate 1 outside the mounting plane 11. The rubber seal strip 6 is mounted on the mounting plane 11, and the end of the connecting flange 22 and the end of the pressing plate 4 are respectively in contact with the baffle 12.
The fixing steel plate 1 is also provided with bolt holes 13 for the penetration connection of the connecting bolts 5. The mounting plane 11 is located the top surface of the fixed steel plate 1, the baffle 12 is located the outside of the mounting plane 11, during assembly, the rubber sealing strip 6 is installed on the mounting plane 11, the connection flange 22 is attached to the rubber sealing strip 6, the pressing plate 4 is pressed tightly on the connection flange 22, meanwhile, the ends of the connection flange 22 and the pressing plate 4 are respectively pressed against the baffle 12, and finally, the fixed steel plate 1, the rubber sealing strip 6, the connection flange 22 and the pressing plate 4 are fastened together through the connecting bolt 5. The stability of the whole structural connection is improved, and the connection flange 22 and the pressing plate 4 can be prevented from moving outwards.
Preferably, the baffle 12 is integrally formed on the top surface of the fixed steel plate 1, so that the structural strength of the fixed steel plate 1 is improved, and the service life is prolonged.
Preferably, connect turn-ups 22 and U type main part 21 integrated into one piece, improved the structural strength of sealing rod 2, prolonged life.
As shown in fig. 10-11, an embodiment of the present invention provides a bridge, which includes two spaced beam bodies 7, and a gap 70 is formed between the two spaced beam bodies 7. Concrete layers 71 are respectively poured above each section of the beam body 7.
The bridge further comprises a telescopic device for use in a bridge as described in any of the previous embodiments.
Two fixed steel plates 1 in the telescopic device are respectively anchored in the concrete layers 71 on two sides through anchoring steel bars 3. The U-shaped body 21 is located in the slot 70. In the concrete layer 71, lateral support bars 8 are arranged in a horizontal direction, and the lateral support bars 8 are supported below the anchoring bars 3. Vertical limiting steel bars 9 extending along the vertical direction are further arranged in the concrete layer 71, and the vertical limiting steel bars 9 are located on one side of the anchoring steel bars 3 and are in contact with the anchoring steel bars 3.
The utility model provides a bridge mainly comprises two sections roof beam bodies 7 and the telescoping device that the interval set up.
For the structure, structure and operation principle of the telescopic device, please refer to the above description of the telescopic device, and the details are not repeated herein.
A gap 70 is formed between two sections of beam bodies 7 which are arranged at intervals, the top of each section of beam body 7 is provided with a concrete layer 71, and transverse supporting steel bars 8 and vertical limiting steel bars 9 are embedded in the concrete layer 71.
One fixing steel plate 1 of the telescopic device is anchored in the concrete layer 71 on one side through the anchoring steel bars 3, and the other fixing steel plate 1 of the telescopic device is anchored in the concrete layer 71 on the other side through the anchoring steel bars 3. The connecting flanges 22 at the two ends of the water stop strip 2 are respectively connected between the two side fixing steel plates 1 and the pressing plate 4, the U-shaped main body 21 is located in the gap 70, accumulated water is borne through the U-shaped groove 20, and rainwater is prevented from seeping into the beam body. And U type main part 21 still has deformability, and when the roof beam body 7 or concrete layer 71 of both sides took place expend with heat and contract with cold, U type main part 21 can make corresponding deformation in order to adapt to the flexible of bridge.
The transverse support bar 8 extends in the horizontal direction, the extending direction of the transverse support bar is parallel to the extending direction of the strip-shaped fixing steel plate 1, and the transverse support bar 8 is positioned below the anchoring bar 3. The transverse supporting steel bars 8 are pre-embedded in the concrete layer 71 and used for supporting the anchoring steel bars 3 and providing stress supporting points for the anchoring steel bars 3.
Vertical spacing reinforcing bar 9 extends in the vertical direction, and it is located one side of anchor reinforcing bar 3 to contact with anchor reinforcing bar 3, avoid anchor reinforcing bar 3 to remove, improve bridge structures's stability.
According to the needs, the above technical schemes can be combined to achieve the best technical effect.
What has been described above is merely the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principle of the present invention, several other modifications can be made, and the protection scope of the present invention should be considered.
Claims (10)
1. A telescopic device used in a bridge is characterized by comprising two fixed steel plates which are arranged at intervals and a water stop strip connected between the two fixed steel plates;
at least one anchoring steel bar is arranged on the outer side of each fixed steel plate;
the water stop strip comprises a U-shaped main body with a U-shaped groove, and connecting flanges extend from the top of the U-shaped main body towards the sides of the fixed steel plates on the two sides respectively;
a pressing plate is arranged on each fixed steel plate, and each connecting flanging is fastened between the pressing plate and the fixed steel plate respectively;
the pressing plate, the connecting flanging and the fixed steel plate on each side are fastened together through connecting bolts;
the two ends of the U-shaped main body are respectively provided with a water-retaining raised edge for plugging the U-shaped groove;
the lower end of the water retaining warped edge is connected to the bottom of the U-shaped groove, and the upper end of the water retaining warped edge extends out of the upper portion of the U-shaped main body.
2. The telescopic device for bridge of claim 1, wherein the water blocking raised edge is integrally formed with the U-shaped main body.
3. The telescopic device for the bridge as claimed in claim 1, wherein both sides of the water blocking raised edge extend towards the direction of the fixed steel plate to form raised edge flanges;
the edge raising flanging is in close contact with the end parts of the pressing plate and the fixed steel plate.
4. The telescopic device for bridge of any one of claims 1-3, wherein the U-shaped main body has a main body connecting end at each end along the length direction;
the main body connecting end extends out of the outer side of the fixed steel plate;
the U-shaped groove is arranged between the connecting ends of the main bodies at the two ends;
a main body connecting tip part is arranged at one end of the main body connecting end, which is far away from the fixed steel plate;
the main body connecting end is provided with main body connecting end bevel edges at two sides of the U-shaped groove respectively, and the main body connecting end bevel edges extend upwards in an inclined mode along the direction from the main body connecting tip end to the fixed steel plate;
the water-retaining raised edge comprises a raised edge main body and a raised edge connecting tip end connected to the bottom of the raised edge main body;
the raised edge connecting tip part and the main body connecting tip part are integrally formed, and the upper end of the raised edge main body extends out of the upper part of the pressing plate;
two sides of the warped edge main body are respectively provided with a warped edge main body bevel edge which is used for being in butt joint with the bevel edge of the connecting end of the main body;
two stick up limit main part hypotenuse respectively with two the main part link hypotenuse corresponds and is connected.
5. The telescopic device for use in a bridge of claim 4, wherein the raised edge body has a body groove with a notch facing the U-shaped groove side.
6. The telescopic device for bridge of claim 1, wherein a rubber sealing strip is arranged between the fixing steel plate and the connecting flange.
7. The telescopic device for bridge of claim 6, wherein the top surface of the fixed steel plate has a mounting plane, and a baffle is arranged on the top surface of the fixed steel plate outside the mounting plane;
the rubber sealing strip is installed on the installation plane, and the end part of the connecting flanging and the end part of the pressing plate are respectively contacted with the baffle.
8. The telescopic device for bridge of claim 7, wherein the baffle is integrally formed on the top surface of the fixing steel plate.
9. The telescopic device for bridge of claim 1, wherein the connecting flange is integrally formed with the U-shaped main body.
10. A bridge comprises two sections of beam bodies which are arranged at intervals, wherein a gap is formed between the two sections of beam bodies;
concrete layers are respectively poured above each section of the beam body;
characterized in that the bridge further comprises a telescopic device for use in a bridge according to any one of claims 1-9;
two fixed steel plates in the telescopic device are respectively anchored in the concrete layers on two sides through the anchoring steel bars;
the U-shaped main body is positioned in the gap;
transverse supporting steel bars are arranged in the concrete layer along the horizontal direction, and the transverse supporting steel bars are supported below the anchoring steel bars;
still be provided with the vertical spacing reinforcing bar that extends along the vertical direction in the concrete layer, vertical spacing reinforcing bar is located one side of anchor reinforcing bar, and with anchor reinforcing bar contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920889674.XU CN210368619U (en) | 2019-06-13 | 2019-06-13 | Expansion device for bridge and bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920889674.XU CN210368619U (en) | 2019-06-13 | 2019-06-13 | Expansion device for bridge and bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210368619U true CN210368619U (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920889674.XU Active CN210368619U (en) | 2019-06-13 | 2019-06-13 | Expansion device for bridge and bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210368619U (en) |
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2019
- 2019-06-13 CN CN201920889674.XU patent/CN210368619U/en active Active
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