CN217909580U - Building and for municipal works foundation ditch dust device - Google Patents
Building and for municipal works foundation ditch dust device Download PDFInfo
- Publication number
- CN217909580U CN217909580U CN202220530658.3U CN202220530658U CN217909580U CN 217909580 U CN217909580 U CN 217909580U CN 202220530658 U CN202220530658 U CN 202220530658U CN 217909580 U CN217909580 U CN 217909580U
- Authority
- CN
- China
- Prior art keywords
- dwang
- rod
- backup pad
- connector
- building
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Abstract
The utility model belongs to the technical field of the construction auxiliary assembly, and a building and for municipal works foundation ditch dust device are disclosed, including first backup pad and second backup pad, the right side fixed mounting of first backup pad upper end has the motor, the first dwang of left side fixedly connected with of motor, the left end swing joint of first dwang has the second dwang. The utility model discloses a hose, first watering box and second watering box isotructure cooperation are in order to realize the effectual advantage of dust fall, fix first backup pad and second backup pad in the both sides of foundation ditch earlier, then through first dead lever and second dead lever, first dwang and second dwang link up, the outside end and the water pump of hose are connected through water after that, water just can flow into first watering box and second watering box inside through the connector and be the interior watering dust fall of foundation ditch through the mouth of falling water of bottom, like this alright reach the effectual purpose of dust fall.
Description
Technical Field
The utility model belongs to the technical field of the construction auxiliary assembly, specifically a building and foundation ditch dust device for municipal works.
Background
The foundation ditch refers to the below ground space for carrying out the construction of building foundation and basement and excavates, is applied to building engineering, and the foundation ditch belongs to temporary engineering, and its effect provides a space, makes the masonry operation of basis go on according to the position appointed by the design, and at the excavation in-process, can raise a large amount of dusts in the foundation ditch, causes the injury to constructor's health easily to influence the construction progress, so dust fall work is extremely important.
Present building and for municipal works foundation ditch dust fall mode all are that the handheld water pipe of workman sprays to the dust that raises to play the dust fall effect, this kind of dust fall mode, efficiency is extremely low, and the foundation ditch area is great, needs the workman to run and runs away, has increased intensity of labour for the workman.
Present building and foundation ditch dust device for municipal works also adopt the dust fall canopy, and this dust fall canopy is bulky, can't carry out the yardstick and adjust moreover, can't be suitable for the foundation ditch of multiple different width and length.
SUMMERY OF THE UTILITY MODEL
The utility model aims at above problem, the utility model provides a building and foundation ditch dust device for municipal works has the advantage that the dust fall is effectual and application scope is wide.
In order to achieve the above object, the utility model provides a following technical scheme: a foundation pit dust settling device for building and municipal engineering comprises a first supporting plate and a second supporting plate, wherein a motor is fixedly installed on the right side of the upper end of the first supporting plate, a first rotating rod is fixedly connected to the left side of the motor, a second rotating rod is movably connected to the left end of the first rotating rod, a first fixing rod is fixedly connected to the inner side of the upper end of the first supporting plate, a second fixing rod is movably connected to the left end of the first fixing rod, a connector is in threaded connection with the outer portion of the first rotating rod, a hose is fixedly connected to the top of the connector, a first sprinkling box is fixedly connected to the front end of the connector, a second sprinkling box is movably sleeved on the outer portion of the first sprinkling box, and water reducing ports are formed in the bottoms of the first sprinkling box and the second sprinkling box, the equal threaded connection in both ends has fastening bolt about second watering box rear end, fix first backup pad and second backup pad in the both sides of foundation ditch earlier, then through first dead lever and second dead lever, first dwang and second dwang link up, outside end and the water pump of hose are connected and are led to water after that, water just can flow into first watering box and second watering box inside and through the mouth of a river that falls of bottom for the interior watering dust fall of foundation ditch through the connector, last starter motor drives first dwang and second dwang forward and backward rotation, because the existence of screw thread, can make the connector take first watering box and second watering box to make a round trip to slide along first dead lever and second dead lever, for even watering in the foundation ditch, automatic dust fall, high efficiency.
As a preferred technical solution of the present invention, a first connection port is disposed in the middle of the right side of the first fixing rod, a first connection rod is fixedly connected to the middle of the left side of the second fixing rod, a second connection port is disposed in the middle of the right side of the first rotation rod, a second connection rod is fixedly connected to the middle of the left side of the second rotation rod, the first connection rod at the left end of the second fixing rod can be inserted into the first connection port at the right end of the first fixing rod to complete the connection between the first fixing rod and the second fixing rod, and then the first connection rod at the inner side end of the second support plate can be inserted into the first connection port at the right end of the second fixing rod to complete the erection, and simultaneously the second connection rod at the left end of the second rotation rod can be inserted into the second connection port at the right end of the first rotation rod to complete the connection between the first rotation rod and the second rotation rod (the threads on the first rotation rod and the second rotation rod are engaged), and then the second connection port at the right end of the second rotation rod and the second support plate can be connected to complete the erection, and the extension of the dust-falling device by adding the second fixing rod and the second fixing rod; the accessible pulling second watering box extends to the outside to twist and move fastening bolt extrusion fixed, can prolong this dust device's use width, adjust simple, convenient.
As a preferred technical scheme of the utility model, a first connecting rod is fixedly arranged at the inner side end of the upper end of the second supporting plate, a second connecting rod positioned below the first connecting rod is movably clamped at the inner side end of the upper end of the second supporting plate, and the first connecting port, the first connecting rod, the second connecting port and the second connecting rod are all in a square structure, so that the first fixing rod and the second fixing rod are connected, and the connection is more stable in use; the first rotating rod drives the second rotating rod to rotate together through the second connecting port and the second connecting rod.
As a preferred technical scheme of the utility model, the expansion mouth has been seted up at the middle part of connector lower extreme, all be carved with the screw thread on the surface of first dwang and second dwang and the inner wall of expansion mouth, because the existence of screw thread, when first dwang drives the second dwang and rotates, the connector that receives the restriction of first dead lever and second dead lever just can lateral shifting work.
As a preferred technical scheme of the utility model, spacing mouth has been seted up to the upper end of connector, the internal diameter value size of spacing mouth and the internal diameter value size looks adaptation of first dead lever and second dead lever, the first dead lever of existence accessible of spacing mouth and second dead lever will connect the head spacing, make it when first dwang and second dwang rotate, because the existence of screw thread, it can lateral shifting work.
As a preferred technical scheme of the utility model, spacing slide has all been seted up at the middle part of the first watering box left and right sides, equal fixed mounting has spacing draw runner on the inner wall at both ends about the second watering box, the screw thread mouth has all been seted up at the middle part at both ends about the second watering box rear end, and the accessible is to the outside pulling second watering box make spacing draw runner slide in spacing slide inside to prolong this dust device's use width, twist again and move fastening bolt at the screw thread mouth internal activity and extrude with spacing slide, thereby fix the second watering box.
As a preferred technical solution of the present invention, the first connection port, the first connection rod, the second connection port, and the second connection rod all adopt a square structure, and since the first connection port, the first connection rod, the second connection port, and the second connection rod all adopt a square structure, the first fixing rod and the second fixing rod are connected, so that they are more stable in use; the first rotating rod drives the second rotating rod to rotate together through the second connector and the second connecting rod.
Compared with the prior art, the beneficial effects of the utility model are as follows:
1. the utility model discloses a hose, first watering box and second watering box isotructure cooperation are in order to realize the effectual advantage of dust fall, fix first backup pad and second backup pad in the both sides of foundation ditch earlier, then through first dead lever and second dead lever, first dwang and second dwang link up, outside end and the water pump of hose are connected through water after that, water just can flow into first watering box and second watering box inside and through the mouth of a river that falls of bottom for watering in the foundation ditch through the connector, the dust fall drives first dwang and second dwang forward and reverse rotation at last starter motor, because the existence of screw thread, can make the connector take first watering box and second watering box along first dead lever and second dead lever round trip to slide, for even watering in the foundation ditch, automatic dust fall, high efficiency, so alright reach effectual purpose.
2. The utility model discloses a first connector, first connecting rod and second connector isotructure cooperation are in order to realize the wide advantage of application scope, the accessible inserts the first connecting rod of second dead lever left end inside the first connector of first dead lever right-hand member and accomplishes the connection of first dead lever and second fixed rod, make the first connecting rod of second backup pad medial extremity insert inside the first connector of second dead lever right-hand member again, accomplish and erect, insert the second connecting rod of second dwang left end simultaneously and accomplish the connection of first dwang and second dwang (the screw thread on first dwang and the second dwang agrees with) inside the second connector of first dwang right-hand member, make the second connector of second dwang right-hand member be connected with the second connecting rod of second medial extremity backup pad again, accomplish and erect, thereby prolong the live length of the device through increasing second dwang and second dead lever; the accessible pulling second watering box extends to the outside to twist and move fastening bolt extrusion fixed, can prolong this dust device's use width, adjust simple, convenient, alright reach the purpose that application scope is wide like this.
Drawings
FIG. 1 is a schematic view of the whole structure of the present invention;
fig. 2 is a schematic view of the dust falling device of the present invention in use;
FIG. 3 is a schematic view of the position of the structural precipitation port of the present invention;
fig. 4 is a schematic view illustrating the positions of the first connector and the second connector according to the present invention;
fig. 5 is a schematic view of the side end structure of the second supporting plate of the present invention.
In the figure: 1. a first support plate; 2. a second support plate; 3. a motor; 4. a first rotating lever; 5. a second rotating lever; 6. a first fixing lever; 7. a second fixing bar; 8. a connector; 9. a hose; 10. a first watering box; 11. a second watering box; 12. a water reducing port; 13. fastening a bolt; 14. a first connection port; 15. a first connecting rod; 16. a second connection port; 17. a second connecting rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in figures 1 to 5, the utility model provides a foundation pit dust-settling device for building and municipal engineering, which comprises a first supporting plate 1 and a second supporting plate 2, a motor 3 is fixedly arranged on the right side of the upper end of the first supporting plate 1, a first rotating rod 4 is fixedly connected on the left side of the motor 3, a second rotating rod 5 is movably connected on the left end of the first rotating rod 4, a first fixing rod 6 is fixedly connected on the inner side of the upper end of the first supporting plate 1, a second fixing rod 7 is movably connected on the left end of the first fixing rod 6, a connector 8 is connected on the external thread of the first rotating rod 4, a hose 9 is fixedly connected on the top of the connector 8, a first sprinkling box 10 is fixedly connected on the front end of the connector 8, a second sprinkling box 11 is sleeved on the external activity of the first sprinkling box 10, and a water-dropping port 12 is arranged on the bottoms of the first sprinkling box 10 and the second sprinkling box 11, the equal threaded connection in both ends has fastening bolt 13 about 11 rear ends of second watering box, fix first backup pad 1 and second backup pad 2 in the both sides of foundation ditch earlier, then through first dead lever 6 and second dead lever 7, first dwang 4 and the connection of second dwang 5 erect, outside end and the water pump of hose 9 are connected and are led water, water just can flow into first watering box 10 and the interior watering dust fall of second watering box 11 through connector 8 inside and through the precipitation mouth 12 of bottom for the foundation ditch in, last starter motor 3 drives first dwang 4 and the forward and reverse rotation of second dwang 5, because the existence of screw thread, can make connector 8 take first watering box 10 and second watering box 11 to make a round trip to slide along first dead lever 6 and second dead lever 7, for even watering in the foundation ditch, automatic dust fall, efficiency is higher.
Wherein, the middle part of the right side of the first fixed rod 6 is provided with a first connector 14, the middle part of the left side of the second fixed rod 7 is fixedly connected with a first connecting rod 15, the middle part of the right side of the first rotating rod 4 is provided with a second connector 16, the middle part of the left side of the second rotating rod 5 is fixedly connected with a second connecting rod 17, the first connecting rod 15 at the left end of the second fixed rod 7 can be inserted into the first connector 14 at the right end of the first fixed rod 6 to complete the connection of the first fixed rod 6 and the second fixed rod 7, then the first connecting rod 15 at the inner side end of the second supporting plate 2 is inserted into the first connector 14 at the right end of the second fixed rod 7 to complete the erection, meanwhile, the second connector 16 at the right end of the second rotating rod 5 is inserted into the second connector 16 at the right end of the first rotating rod 4 to complete the connection of the first rotating rod 4 and the second rotating rod 5 (the threads on the first rotating rod 4 and the second rotating rod 5 are engaged), then the second connector 16 at the right end of the second rotating rod 5 is connected with the second connecting rod 17 at the inner side end of the second supporting plate 2 to complete the erection, and the erection is completed, and the erection is increased by the second fixed rod 5 and the second fixed rod 7 to prolong the use length of the dustfall device; the accessible pulling second watering box 11 extends to the outside to twist and move fastening bolt 13 extrusion fixed, can prolong this dust device's use width, adjust simple, convenient.
The first connecting rod 15 is fixedly mounted at the inner side end of the upper end of the second supporting plate 2, the second connecting rod 17 positioned below the first connecting rod 15 is movably clamped at the inner side end of the upper end of the second supporting plate 2, and the first connecting port 14, the first connecting rod 15, the second connecting port 16 and the second connecting rod 17 are of square structures, so that the first fixing rod 6 and the second fixing rod 7 are connected and are more stable in use; the rotating first rotating rod 4 drives the second rotating rod 5 to rotate together through the second connecting port 16 and the second connecting rod 17.
Wherein, the activity mouth has been seted up at the middle part of connector 8 lower extreme, all is carved with the screw thread on the surface of first dwang 4 and second dwang 5 and the inner wall of activity mouth, because the existence of screw thread, when first dwang 4 drives second dwang 5 and rotates, the connector 8 that receives the restriction of first dead lever 6 and second dead lever 7 just can lateral shifting work.
Wherein, spacing mouth has been seted up to the upper end of connector 8, and the internal diameter value size of spacing mouth is with the internal diameter value size looks adaptation of first dead lever 6 and second dead lever 7, and the first dead lever 6 of existence accessible of spacing mouth and second dead lever 7 are spacing with connector 8, make it when first dwang 4 and second dwang 5 rotate, because the existence of screw thread, it can lateral shifting work.
Wherein, spacing slide has all been seted up at the middle part of the 10 left and right sides of first watering box, equal fixed mounting has spacing draw runner on the inner wall at both ends about second watering box 11, the screw thread mouth has all been seted up at the middle part at both ends about 11 rear ends of second watering box, the accessible makes spacing draw runner slide in spacing slide inside to the outside pulling second watering box 11, thereby prolong this dust device's use width, twist again and move fastening bolt 13 at screw thread mouth inside activity and with spacing slide extrusion, thereby fix second watering box 11.
The first connecting port 14, the first connecting rod 15, the second connecting port 16 and the second connecting rod 17 are of square structures, and the first connecting port 14, the first connecting rod 15, the second connecting port 16 and the second connecting rod 17 are of square structures, so that the first fixing rod 6 and the second fixing rod 7 are connected, and the stability is improved in use; the rotating first rotating lever 4 drives the second rotating lever 5 to rotate together through the second connecting port 16 and the second connecting rod 17.
The utility model discloses a theory of operation and use flow:
firstly, a first supporting plate 1 and a second supporting plate 2 can be fixed on two sides of a foundation pit, then the first supporting plate and the second supporting plate are connected and erected through a first fixing rod 6 and a second fixing rod 7, a first rotating rod 4 and a second rotating rod 5, then the outer side end of a hose 9 is connected with a water pump to be filled with water, the water can flow into a first sprinkling box 10 and a second sprinkling box 11 through a connector 8, and water is sprinkled and dusted in the foundation pit through a precipitation port 12 at the bottom;
finally, the motor 3 is started to drive the first rotating rod 4 and the second rotating rod 5 to rotate in the forward and reverse directions, and due to the existence of the threads, the connector 8 can drive the first sprinkling box 10 and the second sprinkling box 11 to slide back and forth along the first fixing rod 6 and the second fixing rod 7, so that water is uniformly sprinkled in the foundation pit, automatic dust fall is realized, and the efficiency is high;
the first fixing rod 6 and the second fixing rod 7 can be connected by inserting the first connecting rod 15 at the left end of the second fixing rod 7 into the first connecting port 14 at the right end of the first fixing rod 6, then the first connecting rod 15 at the inner side end of the second supporting plate 2 is inserted into the first connecting port 14 at the right end of the second fixing rod 7, erection is completed, meanwhile, the second connecting rod 17 at the left end of the second rotating rod 5 is inserted into the second connecting port 16 at the right end of the first rotating rod 4, connection of the first rotating rod 4 and the second rotating rod 5 is completed (the threads on the first rotating rod 4 and the second rotating rod 5 are engaged), then the second connecting port 16 at the right end of the second rotating rod 5 is connected with the second connecting rod 17 at the inner side end of the second supporting plate 2, erection is completed, and the use length of the dust-settling device is prolonged by adding the second rotating rod 5 and the second fixing rod 7; the accessible pulling second watering box 11 extends to the outside to twist and move fastening bolt 13 extrusion fixed, can prolong this dust device's use width, adjust simple, convenient.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a building and foundation ditch dust device for municipal works, includes first backup pad (1) and second backup pad (2), its characterized in that: the utility model discloses a watering device, including first backup pad (1), motor (3), the first dwang of left side fixedly connected with (4) of motor (3), the left end swing joint of first dwang (4) has second dwang (5), the first dead lever of inboard fixedly connected with (6) of first backup pad (1) upper end, the left end swing joint of first dead lever (6) has second dead lever (7), the outside threaded connection of first dwang (4) has connector (8), the top fixedly connected with hose (9) of connector (8), the front end fixedly connected with first watering box (10) of connector (8), the outside activity of first watering box (10) has cup jointed second watering box (11), the mouth of descending water (12) has all been seted up to the bottom of first watering box (10) and second watering box (11), the equal threaded connection in both ends has fastening bolt (13) about second watering box (11) rear end.
2. The foundation pit dust suppression device for building and municipal engineering according to claim 1, characterized in that: first connecting port (14) have been seted up at the middle part on first dead lever (6) right side, second dead lever (7) left middle part fixedly connected with head rod (15), second connecting port (16) have been seted up at the middle part on first dwang (4) right side, second dwang (5) left middle part fixedly connected with second connecting rod (17).
3. The foundation pit dust suppression device for building and municipal engineering according to claim 1, characterized in that: the inboard end fixed mounting of second backup pad (2) upper end has head rod (15), the activity joint of the inboard end of second backup pad (2) upper end has second connecting rod (17) that are located head rod (15) below.
4. The foundation pit dust settling device for building and municipal engineering according to claim 1, characterized in that: the activity mouth has been seted up at the middle part of connector (8) lower extreme, all be carved with the screw thread on the surface of first dwang (4) and second dwang (5) and the inner wall of activity mouth.
5. The foundation pit dust settling device for building and municipal engineering according to claim 1, characterized in that: the upper end of the connector (8) is provided with a limiting opening, and the inner diameter of the limiting opening is matched with the inner diameter of the first fixing rod (6) and the second fixing rod (7).
6. The foundation pit dust settling device for building and municipal engineering according to claim 1, characterized in that: the middle parts of the left side and the right side of the first sprinkling box (10) are provided with limiting slideways, the inner walls of the left side and the right side of the second sprinkling box (11) are fixedly provided with limiting sliding strips, and the middle parts of the left side and the right side of the rear end of the second sprinkling box (11) are provided with threaded openings.
7. The foundation pit dust settling device for building and municipal engineering according to claim 2, characterized in that: the first connecting port (14), the first connecting rod (15), the second connecting port (16) and the second connecting rod (17) are all square structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220530658.3U CN217909580U (en) | 2022-03-10 | 2022-03-10 | Building and for municipal works foundation ditch dust device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220530658.3U CN217909580U (en) | 2022-03-10 | 2022-03-10 | Building and for municipal works foundation ditch dust device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217909580U true CN217909580U (en) | 2022-11-29 |
Family
ID=84147687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220530658.3U Active CN217909580U (en) | 2022-03-10 | 2022-03-10 | Building and for municipal works foundation ditch dust device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217909580U (en) |
-
2022
- 2022-03-10 CN CN202220530658.3U patent/CN217909580U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213306450U (en) | Vertical greening external sunshade device for ecological building | |
| CN111576530A (en) | Pear is planted and is used irrigation canals and ditches cleaning device | |
| CN217909580U (en) | Building and for municipal works foundation ditch dust device | |
| CN208285949U (en) | A kind of water-saving vertical greening device with shaded effects | |
| CN213836287U (en) | Bridge is with wash port of preventing blockking up | |
| CN211421633U (en) | Assembled building roof that drainage effect is good | |
| CN211286502U (en) | Plastering device for building construction | |
| CN215888567U (en) | Energy-saving environment-friendly green building | |
| CN209194686U (en) | Underground sumping device | |
| CN215858669U (en) | Prevent blockking up drain pipe for housing construction | |
| CN214102637U (en) | Municipal afforestation plumbing water saving fixtures | |
| CN210121579U (en) | Gate belt cleaning device for hydraulic engineering | |
| CN209723207U (en) | No-dig technique pipeline sludge cleaning plant | |
| CN209779589U (en) | Highway sluicing groove rubbish clearance collection device | |
| CN216471394U (en) | Be applied to pipe laying pay-off of hydraulic engineering construction | |
| CN217461224U (en) | Building structure design roof eaves mouth waterproof construction | |
| CN218553290U (en) | Rain pipe rainwater purification treatment device | |
| CN215329241U (en) | Highway engineering bridge construction bridge face concrete health preserving device | |
| CN220768639U (en) | Anti-blocking drainage structure for building | |
| CN219087894U (en) | Greening roof energy-saving system | |
| CN217538594U (en) | Automatic soil cleaning device of long spiral drilling pile machine | |
| CN214695682U (en) | Novel foundation pit dewatering device | |
| CN215562784U (en) | Ecological barricade of assembled prefabricated reinforced concrete empty box structure | |
| CN218063695U (en) | Building structure design antidetonation connection structure | |
| CN217231342U (en) | Municipal drainage pipeline of modularization assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221207 Address after: 213,300 Room 203, No. 9, Yongxing Avenue, Shangxing Town, Liyang City, Changzhou City, Jiangsu Province Patentee after: Jiangsu Hanyu Construction Co.,Ltd. Address before: No. 168, Chuangye Road, Tianmuhu Town, Liyang City, Changzhou City, Jiangsu Province, 213300 Patentee before: Jiangsu Shunlian Engineering Construction Co.,Ltd. |
|
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Ma Haiyan Inventor after: Jiang Jianjun Inventor after: Jiang Jianhua Inventor after: Jiang Yicheng Inventor before: Jiang Jianjun Inventor before: Jiang Jianhua Inventor before: Jiang Yicheng |