CN209798596U - sinking gate for exhibition hall - Google Patents
sinking gate for exhibition hall Download PDFInfo
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- CN209798596U CN209798596U CN201920406756.4U CN201920406756U CN209798596U CN 209798596 U CN209798596 U CN 209798596U CN 201920406756 U CN201920406756 U CN 201920406756U CN 209798596 U CN209798596 U CN 209798596U
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Abstract
the utility model discloses a sinking gate for exhibition hall, which comprises a first gate body, a second gate body, a third gate body and a control host, wherein a holding tank is arranged below the second gate body, a shell is arranged in the holding tank, and the front end and the rear end of the left side surface and the right side surface of the shell are respectively provided with a chute; two opposite side surfaces of the upper end of one sliding chute are respectively provided with a first infrared emitter and a first infrared receiver, and two opposite side surfaces of the lower end of the one sliding chute are respectively provided with a second infrared emitter and a second infrared receiver; both ends all are equipped with elevator motor around the casing bottom, and elevator motor's output is connected with the screw rod, and elevator motor links with the control motor electricity. The utility model discloses a second floodgate machine body can be accomodate to the underground, and the space of increase entry need not demolish, directly sink to underground can, simple and convenient, labour saving and time saving.
Description
Technical Field
The utility model relates to an exhibition room specifically is a formula floodgate machine that sinks is used in exhibition room.
Background
The exhibition hall serves as a public building for exhibiting temporary showpiece. The exhibition system is divided into a comprehensive exhibition hall and a professional exhibition hall according to the contents of exhibition. The professional exhibition hall can be divided into different types of exhibition halls of industry, agriculture, trade, traffic, scientific technology, cultural art and the like. Therefore, a people flow counting device is arranged at the entrance of the exhibition hall to count the number of people in the hall.
some exhibition halls can be arranged into other places such as office places after completing one exhibition, and can be arranged into the exhibition halls when the exhibition halls are needed. When one place is used as an exhibition hall, because the flow of people is very large, a gate can be installed at an entrance to verify the identity information of exhibition personnel, arrange the exhibition personnel to enter the hall in sequence and the like, and when the exhibition is finished and the exhibition personnel need to be arranged into other places, the gate can narrow the entrance, is very obstructive, can be detached, and can be reinstalled when the exhibition hall needs to be arranged again, so that the damage to the ground and the labor cost are repeatedly caused, and time and labor are wasted.
SUMMERY OF THE UTILITY MODEL
For solving the defect of above-mentioned prior art, the utility model provides an exhibition room is with formula floodgate machine that sinks, the utility model discloses a second floodgate machine body can be accomodate to the underground, and the space of increase entry need not demolish, directly sink to underground can, simple and convenient, labour saving and time saving.
In order to achieve the technical purpose, the utility model adopts the following technical scheme: a sinking gate for an exhibition hall comprises a first gate body, a second gate body, a third gate body, wherein the second gate body is arranged between the first gate body and the third gate body, the upper ends of the first gate body and the third gate body are respectively provided with an inlet railing and an outlet railing, and the sinking gate also comprises a control host,
An accommodating groove is arranged below the second gate body, a shell is arranged in the accommodating groove, and sliding grooves are respectively formed in the front end and the rear end of the left side surface and the right side surface of the shell; two opposite side surfaces of the upper end of one sliding chute are respectively provided with a first infrared emitter and a first infrared receiver, and two opposite side surfaces of the lower end of the sliding chute are respectively provided with a second infrared emitter and a second infrared receiver;
The front end and the rear end of the bottom of the shell are respectively provided with a lifting motor, the output end of the lifting motor is connected with a screw rod, and the lifting motor is electrically connected with a control motor;
The lower end of the second gate body is provided with a sliding plate corresponding to the sliding chute and a connecting plate corresponding to the screw rod; the connecting plate is provided with a threaded hole which is communicated up and down, and the screw rod is arranged in the threaded hole in a penetrating way; the sliding plate is embedded into the sliding groove and slides up and down along the sliding groove;
A sinking button and a rising button which are respectively electrically connected with the control host are arranged on the second gate body;
A third groove is formed in the upper end of the first gate body, and an inlet handrail is rotatably arranged in the third groove; the upper end of the third gate body is provided with a fourth groove, and an outlet handrail is rotatably arranged in the fourth groove;
the lower side surface of the third groove is provided with a first communicated vertical groove, and the inlet handrail can be accommodated in the first vertical groove; the lower side surface of the fourth groove is provided with a second communicated vertical groove, and the outlet handrail can be accommodated in the second vertical groove.
Preferably, an emergency stop button is connected to an input end of the control host.
Preferably, the upper end of the second gate body is provided with a first groove and a second groove; when the inlet handrail is in a horizontal state, the free end of the inlet handrail is embedded in the first groove; when the outlet handrail is in a horizontal state, the free end of the outlet handrail is embedded in the second groove.
Preferably, the upper end part of the second gate body is provided with an empty slot, and the sinking button and the rising button are arranged in the empty slot; the empty groove is provided with an upper cover.
Preferably, a first rotating shaft is fixedly arranged at one end, arranged in the third groove, of the inlet handrail in a penetrating manner, the first rotating shaft is connected with the first gate body through a bearing, one end of the first rotating shaft is connected with a first motor, and the first motor is arranged in the first gate body; the first floodgate machine body is provided with a first storage button, and the first storage button is electrically connected with the control host.
Preferably, a second rotating shaft is fixedly arranged at one end of the outlet handrail, which is arranged in the fourth groove in a penetrating manner, the second rotating shaft is connected with the third gate body through a bearing, one end of the second rotating shaft is connected with a second motor, and the second motor is arranged in the third gate body; and a second storage button is arranged on the third gate body and is electrically connected with the control host.
Preferably, the sinking gate further comprises a people flow rate statistic device, wherein the people flow rate statistic device comprises a counter, two groups of infrared transceivers and a memory; the counter receives signals of the two groups of infrared transceivers and sends the number of people to the control host, and the output end of the control host is electrically connected with the memory.
preferably, the two groups of infrared transceivers comprise a third infrared emitter and a fourth infrared emitter which are arranged on two side faces of the second gate body, a third infrared receiver which is arranged on the first gate body and corresponds to the three phases of the infrared emitters, and a fourth infrared receiver which is arranged on the third gate body and corresponds to the four phases of the infrared emitters.
Preferably, the people flow rate statistic device further comprises a first camera, a second camera, a display screen and a voice broadcast device; the first camera and the second camera are respectively arranged at the upper ends of the first gate body and the third gate body; the display screen and the voice broadcast device are arranged on the front side face of the first gate body.
To sum up, the utility model discloses following technological effect has been gained:
1. The utility model discloses set up first floodgate machine body, second floodgate machine body, third floodgate machine body in the entrance in exhibition room, the second floodgate machine body adopts the formula of sinking, can sink into the holding tank underground, when needing the second floodgate machine body, press the rise button, the second floodgate machine body rises to operating condition, when not needing the second floodgate machine body, press the decline button, the second floodgate machine body descends to the holding tank in, make the entry in place grow, convenient to use;
2. The utility model discloses set up four spouts, four slides that correspond with the spout in the holding tank for drag the second floodgate machine body, set up two elevator motors, two screw rods, two connecting plates and be used for driving the second floodgate machine body up-and-down motion, elevator motor is by the control host control synchronous work, the precision is high, facilitates the use;
3. The utility model is provided with the first infrared emitter and the first infrared receiver at the upper end of one of the chutes, when the slide plate blocks the reception of the first infrared receiver, the control host controls the lifting motor to stop working, and the second gate body is in a working state; the second infrared emitter and the second infrared receiver are arranged at the lower end of the sliding chute, when the sliding plate blocks the receiving of the second infrared receiver, the control host controls the lifting motor to stop working, and the second gate body is in a completely sinking state;
4. The utility model is provided with a first vertical groove and a second vertical groove, when a second gate body sinks, the entrance handrail and the exit handrail need to be stored, the first storage button and the second storage button are pressed, the control host controls the first motor and the second motor to rotate so as to store the entrance handrail and the exit handrail into the first vertical groove and the second vertical groove, the appearance of the entrance handrail and the exit handrail is prevented from being influenced by the external situation, and the occupied space is reduced after the entrance handrail and the exit handrail are stored;
5. The utility model discloses set up flow of people statistics device, two sets of infrared transceiver are used for the number of perception access & exit respectively, and the number of access & exit is calculated to the counter according to infrared transceiver's signal to calculate the number in the field, show on the display screen, and preserve at the memory, the number in the statistics of field of being convenient for, when the number is too much in the field, alarm processing, the staff of being convenient for in time handles.
Drawings
FIG. 1 is a front view of the present invention;
fig. 2 is a top view of the present invention;
FIG. 3 is a schematic connection diagram of the present invention;
in the figure, 1, a first gate body, 101, an entrance railing, 102, a third groove, 103, a first vertical groove, 104, a first rotating shaft, 105, a first storage button, 106, a first lifting button, 2, a second gate body, 201, a sliding plate, 202, a connecting plate, 203, a first groove, 204, a second groove, 205, a blank groove, 3, a third gate body, 301, an exit railing, 302, a fourth groove, 303, a second vertical groove, 304, a second rotating shaft, 305, a second storage button, 306, a second lifting button, 4, a shell, 401, a sliding groove, 5, a lifting motor, 6, a screw, 7, a sinking button, 8, a lifting button, 9, a first infrared emitter, 10, a first infrared receiver, 11, a second infrared emitter, 12, a second infrared receiver, 13, an emergency stop button, 14, a first motor, 15, a second motor, 16, and a third infrared emitter, 17. the device comprises three infrared receivers, 18, four infrared transmitters, 19, four infrared receivers, 20, a counter, 21, a memory, 22, a first camera, 23, a second camera, 24, a display screen, 25, a voice broadcaster, 26 and an alarm.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Example (b):
As shown in fig. 1, a sinking type gate for exhibition hall comprises a first gate body 1, a second gate body 2, and a third gate body 3, wherein the second gate body 2 is arranged between the first gate body 1 and the third gate body 3, an inlet is formed between the first gate body 1 and the second gate body 2, an outlet is formed between the second gate body 2 and the third gate body 3, an inlet railing 101 and an outlet railing 301 are respectively arranged at the upper ends of the first gate body 1 and the third gate body 3, and the sinking type gate further comprises a control host which is arranged in the first gate body 1.
As shown in fig. 1, an accommodating groove is formed below the second gate body 2, a housing 4 is arranged inside the accommodating groove, and the upper end of the housing 4 is open for the second gate body 2 to pass through. The front end and the rear end of the left side surface and the right side surface of the shell 4 are respectively provided with four sliding chutes 401; two opposite side surfaces of the upper end of one sliding chute 401 are respectively provided with a first infrared emitter 9 and a first infrared receiver 10, and two opposite side surfaces of the lower end are respectively provided with a second infrared emitter 11 and a second infrared receiver 12; the first infrared receiver 10 receives the infrared rays emitted by the first infrared emitter 9, and the second infrared receiver 12 receives the infrared rays emitted by the second infrared emitter 11. The first infrared emitter 9, the first infrared receiver 10, the second infrared emitter 11 and the second infrared receiver 12 are electrically connected with the control host.
Both ends all are equipped with elevator motor 5 around 4 bottoms of casing, and elevator motor 5 is equipped with two, is located the intermediate position at front and back both ends, and elevator motor 5's output is connected with screw rod 6, and elevator motor 5 links with the control host computer electricity, and elevator motor 5 and screw rod 6 pass through the bearing and connect. The control motor controls the lifting motor 5 to rotate forward and backward and stop.
The lower end of the second gate body 2 is provided with four sliding plates 201 corresponding to the sliding grooves 401 and two connecting plates 202 corresponding to the screw rods 6; the connecting plate 202 is provided with a threaded hole which is communicated up and down, the screw 6 penetrates through the threaded hole, when the lifting motor 5 rotates forwards and backwards, the screw 6 rotates along with the threaded hole, the connecting plate 202 ascends and descends along with the threaded hole, and the length of the screw 6 is larger than the moving distance of the connecting plate 202; the slide plate 201 is inserted into the slide slot 401 and slides up and down along the slide slot 401. When the sliding plate 201 slides to the bottom of the sliding groove 401, the sliding plate 201 blocks the reception of the second infrared receiver 12, the control host controls the lifting motor 5 to stop, and when the sliding plate 201 slides to the top of the sliding groove 401, the sliding plate 201 blocks the reception of the first infrared receiver 10, and the control host controls the lifting motor 5 to stop.
as shown in fig. 2, the second gate body 2 is provided with a sinking button 7 and a rising button 8 which are respectively electrically connected with the control host; when the sinking button 7 or the rising button 8 is triggered, the control host controls the lifting motor 5 to rotate forward and backward, so that the second gate body 2 is driven to move up and down.
The upper end of the first gate body 1 is provided with a third groove 102, and an inlet railing 101 is rotatably arranged in the third groove 102; the upper end of the third gate body 3 is provided with a groove IV 302, and an outlet railing 301 is rotatably arranged in the groove IV 302.
The lower side surface of the third groove 102 is provided with a first communicated vertical groove 103, and the inlet handrail 101 can be accommodated in the first vertical groove 103; the lower side of the fourth groove 302 is provided with a second communicated vertical groove 303, and the outlet handrail 301 can be accommodated in the second vertical groove 303.
The upper end of the second gate body 2 is provided with a first groove 203 and a second groove 204; when the inlet handrail 101 is in a horizontal state, the free end of the inlet handrail 101 is embedded in the first groove 203; when the outlet handrail 301 is in a horizontal state, the free end of the outlet handrail 301 is embedded in the second groove 204.
A first rotating shaft 104 is fixedly arranged at one end of the inlet railing 101, which is arranged in the third groove 102, in a penetrating manner, the first rotating shaft 104 is connected with the first gate body 1 through a bearing, one end of the first rotating shaft 104 is connected with a first motor 14, and the first motor 14 is arranged in the first gate body 1; the first gate body 1 is provided with a first storage button 105, and the first storage button 105 is electrically connected with the control host. The first motor 14 is electrically connected to the control host.
A second rotating shaft 304 is fixedly arranged at one end of the outlet handrail 301, which is arranged in the groove fourth 302, in a penetrating manner, the second rotating shaft 304 is connected with the third gate body 3 through a bearing, one end of the second rotating shaft 304 is connected with a second motor 15, and the second motor 15 is arranged in the third gate body 3; the third gate body 3 is provided with a second storage button 305, and the second storage button 305 is electrically connected with the control host. The second motor 15 is electrically connected with the control host.
Still be equipped with first lift button 106 on the first floodgate body 1, still be equipped with second lift button 306 on the third floodgate body 3, first lift button 106, second lift button 306 are connected with the control host computer electricity for control entry railing 101, export railing 301 promote to vertical state.
The mounting plates are respectively arranged in the first gate body 1 and the third gate body 3, and the first motor 14 and the second motor 15 are arranged on the mounting plates.
When the second gate body 2 sinks, the first storage button 105 and the second storage button 305 are pressed, the control host controls the first motor 14 and the second motor 15 to rotate, and the inlet handrail 101 and the outlet handrail 301 are driven to rotate to be stored in the first vertical groove 103 and the second vertical groove 303.
The input end of the control host is connected with an emergency stop button 13, and the control host controls the lifting motor 5 to stop emergently by pressing the emergency stop button 13. The emergency stop button 13 is provided on the first gate main body 1.
An empty groove 205 is formed in the upper end of the second gate body 2, and the sinking button 7 and the rising button 8 are arranged in the empty groove 205; the empty groove 205 is provided with an upper cover.
The sinking gate machine also comprises a people flow rate statistical device, wherein the people flow rate statistical device comprises a counter 20, two groups of infrared transceivers and a memory 21; the counter 20 receives the signals of the two groups of infrared transceivers and sends the number of people to the control host, and the output end of the control host is electrically connected with the memory 21. In this embodiment, the memory 21 is of the type AT24C16BY 6-YH-T.
The two groups of infrared transceivers comprise three infrared transmitters 16 and four infrared transmitters 18 which are arranged on two side surfaces of the second gate body 2, three infrared receivers 17 which are arranged on the first gate body 1 and correspond to the three infrared transmitters 16, and four infrared receivers 19 which are arranged on the third gate body 3 and correspond to the four infrared transmitters 18.
the people flow counting device further comprises a first camera 22, a second camera 23, a display screen 24 and a voice broadcaster 25; the first camera 22 and the second camera 23 are respectively arranged at the upper ends of the first gate body 1 and the third gate body 3; the display screen 24 and the voice broadcast device 25 are arranged on the front side surface of the first gate body 1. The first gate body 1 is further provided with an alarm 26 and an identity recognition module, and the identity recognition module is used for verifying identity information of an entering person.
when a person passes through the entrance, the infrared receivers III 17 and IV 19 are influenced to receive infrared rays, the counter 20 calculates the number of people entering the entrance and the number of people leaving the entrance according to signals of the infrared receivers III 17 and IV 19, calculates the number of people in the entrance, displays the number on the display screen 24, and controls the alarm to sound when the number of people in the entrance reaches a preset threshold value, and controls the first motor 14 to drive the entrance handrail 101 to be horizontally placed so as to block people from entering the entrance.
When the exhibition is finished, when second floodgate machine body 2 needs to sink, press down and sink button 7, control host computer control elevator motor 5 drives second floodgate machine body 2 downstream, when slide 201 blocks two 12 receipt infrared rays of infrared receiver, two 12 with signal transmission to the control host computer of infrared receiver, control host computer control elevator motor 5 stops, second floodgate machine body 2 sinks to finish, the apron is placed to the up end of second floodgate machine body 2, cover second floodgate machine body 2, avoid debris to fall into in the recess, the side of going up of apron flushes with ground.
After the second gate body 2 sinks, the first storage button 105 and the second storage button 305 are pressed, the control host controls the first motor 14 and the second motor 15 to rotate, and the inlet handrail 101 and the outlet handrail 301 are driven to rotate to be stored in the first vertical groove 103 and the second vertical groove 303.
When the second gate body 2 needs to be lifted, the first lifting button 106 and the second lifting button 306 are pressed first, and the control host controls the first motor 14 and the second motor 15 to rotate, so as to drive the entrance handrail 101 and the exit handrail 301 to rotate to the vertical state. The cover plate is taken down, the upper cover of the empty groove 205 is opened, the ascending button 8 is pressed, the control host controls the lifting motor 5 to drive the second gate body 2 to move upwards, when the sliding plate 201 slides to the uppermost end of the sliding groove 401, the sliding plate 201 blocks the receiving of the infrared receiver I10, the control host controls the lifting motor 5 to stop, and the second gate body 2 ascends to a working state.
When the motion of the second gate body 2 needs to be stopped emergently, the emergency stop button is pressed, and the control host controls the lifting motor 5 to stop rotating.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides an exhibition room is with formula floodgate machine that sinks, includes first floodgate machine body (1), second floodgate machine body (2), third floodgate machine body (3), first floodgate machine body (1), third floodgate machine body (3) are arranged in to second floodgate machine body (2) in the middle of, first floodgate machine body (1), third floodgate machine body (3) upper end are equipped with entry railing (101), export railing (301) respectively, still include the main control system, its characterized in that:
an accommodating groove is arranged below the second gate body (2), a shell (4) is arranged in the accommodating groove, and sliding grooves (401) are respectively formed in the front end and the rear end of the left side surface and the right side surface of the shell (4); two opposite side surfaces of the upper end of one sliding chute (401) are respectively provided with a first infrared emitter (9) and a first infrared receiver (10), and two opposite side surfaces of the lower end are respectively provided with a second infrared emitter (11) and a second infrared receiver (12);
the front end and the rear end of the bottom of the shell (4) are respectively provided with a lifting motor (5), the output end of the lifting motor (5) is connected with a screw (6), and the lifting motor (5) is electrically connected with a control motor;
the lower end of the second gate body (2) is provided with a sliding plate (201) corresponding to the sliding chute (401) and a connecting plate (202) corresponding to the screw rod (6); the connecting plate (202) is provided with a threaded hole which is through up and down, and the screw rod (6) penetrates through the threaded hole; the sliding plate (201) is embedded into the sliding groove (401) and slides up and down along the sliding groove (401);
A sinking button (7) and a rising button (8) which are respectively electrically connected with the control host are arranged on the second gate body (2);
a third groove (102) is formed in the upper end of the first gate body (1), and an entrance railing (101) is rotatably arranged in the third groove (102); a fourth groove (302) is formed in the upper end of the third gate body (3), and an outlet handrail (301) is rotatably arranged in the fourth groove (302);
the lower side surface of the third groove (102) is provided with a first communicated vertical groove (103), and the inlet railing (101) can be accommodated in the first vertical groove (103); the lower side surface of the fourth groove (302) is provided with a second communicated vertical groove (303), and the outlet handrail (301) can be accommodated in the second vertical groove (303).
2. The sinking gate for exhibition hall as claimed in claim 1, wherein: the input end of the control host is connected with an emergency stop button (13).
3. The sinking gate for exhibition hall as claimed in claim 1, wherein: the upper end of the second gate body (2) is provided with a first groove (203) and a second groove (204); when the inlet handrail (101) is in a horizontal state, the free end of the inlet handrail (101) is embedded in the first groove (203); when the outlet handrail (301) is in a horizontal state, the free end of the outlet handrail (301) is embedded in the second groove (204).
4. the sinking gate for exhibition hall as claimed in claim 1, wherein: an empty groove (205) is formed in the upper end of the second gate body (2), and the sinking button (7) and the rising button (8) are arranged in the empty groove (205); the empty groove (205) is provided with an upper cover.
5. the sinking gate for exhibition hall as claimed in claim 1, wherein: a first rotating shaft (104) is fixedly arranged at one end, arranged in the third groove (102), of the inlet handrail (101) in a penetrating mode, the first rotating shaft (104) is connected with the first gate machine body (1) through a bearing, one end of the first rotating shaft (104) is connected with a first motor (14), and the first motor (14) is arranged inside the first gate machine body (1); the first gate body (1) is provided with a first storage button (105), and the first storage button (105) is electrically connected with the control host.
6. The sinking gate for exhibition hall as claimed in claim 1, wherein: a second rotating shaft (304) is fixedly arranged at one end, arranged in the groove four (302), of the outlet handrail (301) in a penetrating mode, the second rotating shaft (304) is connected with the third gate machine body (3) through a bearing, one end of the second rotating shaft (304) is connected with a second motor (15), and the second motor (15) is arranged inside the third gate machine body (3); and a second storage button (305) is arranged on the third gate body (3), and the second storage button (305) is electrically connected with the control host.
7. the sinking gate for exhibition hall as claimed in claim 1, wherein: the sinking gate machine also comprises a people flow rate statistical device, and the people flow rate statistical device comprises a counter (20), two groups of infrared transceivers and a memory (21); the counter (20) receives signals of the two groups of infrared transceivers and sends the number of people to the control host, and the output end of the control host is electrically connected with the memory (21).
8. The sinking gate for exhibition hall as claimed in claim 7, wherein: the two groups of infrared transceivers comprise three infrared transmitters (16) and four infrared transmitters (18) which are arranged on two side surfaces of the second gate body (2), three infrared receivers (17) which are arranged on the first gate body (1) and correspond to the three infrared transmitters (16), and four infrared receivers (19) which are arranged on the third gate body (3) and correspond to the four infrared transmitters (18).
9. The sinking gate for exhibition hall as claimed in claim 7, wherein: the people flow counting device further comprises a first camera (22), a second camera (23), a display screen (24) and a voice broadcaster (25); the first camera (22) and the second camera (23) are respectively arranged at the upper ends of the first gate body (1) and the third gate body (3); the front side of first floodgate machine body (1) is located in display screen (24), voice broadcast ware (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920406756.4U CN209798596U (en) | 2019-03-27 | 2019-03-27 | sinking gate for exhibition hall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920406756.4U CN209798596U (en) | 2019-03-27 | 2019-03-27 | sinking gate for exhibition hall |
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| Publication Number | Publication Date |
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| CN209798596U true CN209798596U (en) | 2019-12-17 |
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ID=68826897
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| CN201920406756.4U Active CN209798596U (en) | 2019-03-27 | 2019-03-27 | sinking gate for exhibition hall |
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| CN (1) | CN209798596U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112342961A (en) * | 2020-10-29 | 2021-02-09 | 杨光雪 | Keep away waterproof floodgate machine of danger |
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2019
- 2019-03-27 CN CN201920406756.4U patent/CN209798596U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112342961A (en) * | 2020-10-29 | 2021-02-09 | 杨光雪 | Keep away waterproof floodgate machine of danger |
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