CN213662910U

CN213662910U - Farmland irrigation device

Info

Publication number: CN213662910U
Application number: CN202022751950.1U
Authority: CN
Inventors: 朱磊; 张磊; 郭淼; 李靖
Original assignee: Anhui Century Foundation Construction Engineering Co ltd
Current assignee: Qin Zhonghua
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-07-13
Anticipated expiration: 2030-11-23

Abstract

The application relates to a farmland irrigation device, which relates to the field of water conservancy and comprises a water supply tank and a filter screen arranged in the water supply tank, wherein a first groove is formed in the inner side wall of the water supply tank along the horizontal direction, a support rod is arranged in the first groove, the length direction of the support rod is the same as the length direction of the first groove, and one end of the support rod is sleeved with a sleeve; the water supply tank is far away from a through hole for the filter screen to penetrate through is formed in the side wall of the sleeve, and the filter screen is connected with the arc-shaped side wall of the sleeve. This application has improved the cleaning performance of filter screen.

Description

Farmland irrigation device

Technical Field

The application relates to the field of water conservancy, especially, relate to irrigation of farmland device.

Background

At present, farmland irrigation device uses river to irrigate, and the water among the current farmland irrigation device has a lot of grit, and these grit cause the shower nozzle to block up easily, and then lead to crops withered and dry, cause economic loss.

But the chinese patent that the prior art can refer to bulletin number for CN210168626U discloses a field irrigation device, including water inlet box, filter screen and couple, this field irrigation device still includes the brush mechanism, holds mechanism and debris collection tank mechanism, and filter screen slope fixed connection is in water inlet box, and the brush mechanism rotates to be connected on water inlet box, it is provided with two to hold the mechanism, and two hold the mechanism and rotate respectively and connect both ends about brush mechanism, debris collection tank mechanism is provided with two, and two debris are collected the cell body and are sliding connection respectively in water inlet box's the left and right sides, and the device is after using a period, washs the filter screen through the brush mechanism to can collect the grit earth of crossing and clear away.

With respect to the related art in the above, the inventors consider that: when the user uses the rolling brush mechanism located inside the box body to clean the filter screen, the cleaning condition of the filter screen can not be visually observed from the outside of the box body, so that the cleaning of the filter screen is not thorough enough, and the cleaning effect of the filter screen is poor.

SUMMERY OF THE UTILITY MODEL

In order to improve filter screen cleaning performance, this application provides irrigation of farmland device.

The application provides a farmland irrigation device adopts following technical scheme:

the farmland irrigation device comprises a water supply tank and a filter screen arranged in the water supply tank, wherein a first groove is formed in the inner side wall of the water supply tank along the horizontal direction, a support rod is arranged in the first groove, the length direction of the support rod is the same as the length direction of the first groove, and one end of the support rod is sleeved with a sleeve; the water supply tank is far away from a through hole for the filter screen to penetrate through is formed in the side wall of the sleeve, and the filter screen is connected with the arc-shaped side wall of the sleeve.

Through adopting above-mentioned technical scheme, when the user state of filter screen is observed to the outside of water supply tank from needs, at first take the filter screen out from the through-hole, the filter screen drives the sleeve and slides on branch, has played the supporting role to the filter screen, and when the sleeve supported the inside wall of water supply tank, the filter screen stopped moving, when can observing the user state of filter screen to clear up the filter screen, improved filter screen cleaning performance.

Preferably, the inside wall that the first recess was kept away from to the feed water tank has seted up the second recess along the horizontal direction, the screw rod is installed to second recess inner bearing, the length direction of screw rod with the length direction of second recess is the same, a screw thread section of thick bamboo has been cup jointed to the one end of screw rod, the lateral wall that the through-hole was kept away from to a screw thread section of thick bamboo, sleeve is located the coplanar with the lateral wall of filter screen, the filter screen with the arc lateral wall of a screw thread section of thick bamboo is connected.

Through adopting above-mentioned technical scheme, when needs stretch out the feed water tank to the filter screen, rotate the screw rod, the screw rod drives a screw thread section of thick bamboo and removes on the screw rod, and a screw thread section of thick bamboo drives the filter screen and outwards stretches out from through-hole department in the feed water tank, and the filter screen drives the sleeve and slides on branch, has played the effect of direction to the filter screen, and when a screw thread section of thick bamboo and telescopic lateral wall butt when the inside wall of feed water tank, filter screen stop motion simultaneously.

Preferably, the horizontal height of the first groove is higher than that of the second groove, and the filter screen is obliquely arranged.

Through adopting above-mentioned technical scheme, when needs clear up the filter screen, the filter screen slope sets up and is favorable to scraping of grit to fall, has further improved the clearance effect of filter screen.

Preferably, the outer wall of the water supply tank is provided with a cleaning component positioned above the through hole, and the cleaning component comprises a fixing plate horizontally arranged on the outer wall of the water supply tank, a plurality of first springs vertically arranged on the lower end surface of the fixing plate and a scraper arranged at the bottom ends of the first springs; the scraper blade orientation the lateral wall and the feed water tank butt of feed water tank, the bottom of scraper blade sets to the inclined plane, the inclination of scraper blade bottom is the same with the inclination of filter screen.

Through adopting above-mentioned technical scheme, when needs clear up the filter screen, at first spring produces thrust to the scraper blade of below, and the scraper blade slides downwards along the outer wall of feed water tank afterwards, and the bottom butt of last scraper blade promotes the filter screen and removes towards the inside of feed water tank at the up end of filter screen, and the scraper blade clears up the filter screen, and first spring makes the scraper blade hug closely at the up end of filter screen, further improvement the clearance effect of filter screen.

Preferably, stop part is installed respectively to the both sides of scraper blade, stop part is including setting up installation piece on the scraper blade lateral wall, setting up the first horizontal pole on the feed water tank lateral wall and installing the first montant of keeping away from feed water tank one end at first horizontal pole, first montant restricts the slip of installation piece.

Through adopting above-mentioned technical scheme, when the scraper blade removed on the outer wall of feed water tank, the scraper blade probably takes place to separate with the feed water tank, through being provided with installation piece and first montant this moment for the installation piece slides between the outer wall of first montant and feed water tank, has carried out the restriction to the movement path of installation piece, makes the scraper blade hug closely when removing on the outer wall of feed water tank.

Preferably, a scraper is installed on the lower end face of the scraper.

Through adopting above-mentioned technical scheme, the scraper closely laminates with the up end of filter screen, further improvement the clearance effect of filter screen.

Preferably, a cavity is formed in the side wall of the water supply tank, which is on the same side with the second groove and close to the cleaning part, a clamping part is arranged in the cavity, and the clamping part comprises a rotating plate placed in the cavity, a clamping rod penetrating through the side wall of the water supply tank and a second spring horizontally arranged on the end face of the clamping rod and located in the cavity; the middle part of the rotating plate is horizontally provided with a pin shaft which is vertical to the supporting rod in a penetrating mode, the pin shaft is connected to the inner side wall of the cavity in a hinged mode, one end of the clamping rod extends out of the outer side of the water supply tank and is used for supporting the scraping plate, and the other end of the clamping rod is inserted into the cavity and is movably connected with the rotating plate.

By adopting the technical scheme, when the scraper plate needs to be locked above the filter screen, one end of the clamping rod extends out of the outer side of the water supply tank to support the lower end face of the scraper plate, and meanwhile, the second spring generates thrust to the other end of the clamping rod, so that the clamping rod cannot move towards the inside of the cavity when being pressed by the lower end face of the scraper plate; when the scraper blade needs to move down to go on the filter screen, press the joint pole from the outside of feed water tank, the joint pole removes to the inside of cavity and extrudees the second spring, and the joint pole is whole to be inserted behind the lateral wall of feed water tank, and the scraper blade drops downstream from the joint pole.

Preferably, the slide bar is worn to be equipped with by the one end that the joint pole inserted the cavity, the slide bar is parallel to each other with the round pin axle, it supplies the gliding spout of slide bar to have seted up in the one end lateral wall that the commentaries on classics board is close to the slide bar, the vertical second montant of installing on the arc lateral wall of screw thread section of thick bamboo, the second horizontal pole is installed to the up end of second montant, link up each other through the connecting hole between cavity and the second recess, the second horizontal pole is worn to establish in the connecting hole, the bottom butt of second horizontal pole and commentaries on classics board.

Through adopting above-mentioned technical scheme, when the removal of the inside regulation and control scraper blade of water supply tank is followed to needs, at first rotate the screw rod and drive a screw thread section of thick bamboo and remove on the screw rod, a screw thread section of thick bamboo drives the second horizontal pole and removes in the second recess, the second horizontal pole inserts in the cavity through the connecting hole afterwards, press the bottom lateral wall of changeing the board, the upper end of changeing the board rotates around the round pin axle, it slides in the spout to change the board drive slide bar, the slide bar drives the inside removal of joint pole towards the cavity simultaneously, when the joint pole gets into the lateral wall of water supply tank completely, the scraper blade falls.

In summary, the present application includes at least one of the following beneficial technical effects:

the water supply tank is provided with the through holes, so that the function of drawing the filter screen out of the water supply tank is realized, the filter screen can be cleaned when the use condition of the filter screen is observed, the cleaning effect of the filter screen is improved, and meanwhile, the water supply tank is provided with the support rod and the sleeve, so that the filter screen moves along the support rod along with the sleeve, and the support effect is realized on the filter screen;

the screw rod and the threaded barrel are arranged in the water supply tank, the screw rod is rotated to drive the threaded barrel to move on the screw rod, the threaded barrel drives the filter screen to extend out of the through hole in the water supply tank, so that the filter screen is more stable in the moving process, and the filter screen drives the sleeve to slide on the support rod, so that the guide effect on the filter screen is achieved;

through setting up the filter screen slope, when clearing up the filter screen, be favorable to scraping of grit to fall, further improved the clearance effect of filter screen.

Drawings

Fig. 1 is a schematic view of the overall structure of an agricultural irrigation device according to an embodiment of the present invention.

Fig. 2 is a schematic view showing a structure of the filter net removed from the inside of the water service box according to the embodiment of the present invention.

Fig. 3 is a schematic structural diagram illustrating a filter screen and a limiting component according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram illustrating a filter screen and a driving component according to an embodiment of the present application.

Fig. 5 is an enlarged schematic structural diagram of a portion a in fig. 3 according to an embodiment of the present application.

Description of reference numerals: 1. a water supply tank; 11. a first groove; 12. a through hole; 13. a second groove; 14. a cavity; 15. connecting holes; 16. a water inlet pipe; 17. a water outlet pipe; 2. a filter screen; 21. a waterproof sheet; 3. a strut; 31. a sleeve; 4. a drive member; 41. a screw; 42. a threaded barrel; 421. a second vertical bar; 422. a second cross bar; 43. a first gear; 44. a second gear; 45. a transmission rod; 46. a handle is rotated; 5. cleaning the component; 51. a fixing plate; 52. a first spring; 53. a squeegee; 531. a scraper; 6. a limiting component; 61. mounting blocks; 62. a first cross bar; 63. a first vertical bar; 7. a clip member; 71. rotating the plate; 711. a pin shaft; 712. a chute; 72. a clamping and connecting rod; 721. a slide bar; 73. a second spring.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a farmland irrigation device. Referring to fig. 1 and 2, the agricultural irrigation apparatus includes a water supply tank 1, a filter net 2 installed in the water supply tank 1 in an inclined manner, and a driving part 4 installed on a side wall of the water supply tank 1 to horizontally move the filter net 2. A through hole 12 is formed in the side wall, away from the driving part 4, of the water supply tank 1, a waterproof board 21 which is identical to the through hole 12 in shape and size is placed in the through hole 12, the waterproof board 21 is fixedly connected with one end of the filter screen 2, the thickness of the waterproof board 21 is larger than that of the filter screen 2, a gap is formed between the upper end face of the filter screen 2 and the top wall of the through hole 12, and the through hole 12 and the waterproof board 21 are matched with each other to complete sealing of the water supply tank 1; the outer side wall of the water service box 1 is mounted with the cleaning member 5 above the through-hole 12.

The inlet tube 16 is installed to the up end of feed tank 1, installs outlet pipe 17 on the lateral wall of feed tank 1, and the filter screen 2 is flowed through in the entering of feed tube 16 to the irrigation water in farmland, discharges from outlet pipe 17, has accomplished the filtration to rivers.

Referring to fig. 3 and 4, a first groove 11 is formed in the inner side wall of the water supply tank 1 along the horizontal direction, a supporting rod 3 having the same length direction as the first groove 11 is fixedly connected in the first groove 11, a sleeve 31 is sleeved on one end of the supporting rod 3 far away from the through hole 12, and the filter screen 2 is fixedly connected with the sleeve 31; the second recess 13 has been seted up along the horizontal direction on the inside wall that the feed water tank 1 kept away from first recess 11, and drive unit 4 places in second recess 13, and drive unit 4 connects on the filter screen 2 keeps away from the lateral wall of sleeve 31.

The driving part 4 comprises a screw 41, a threaded cylinder 42, a first gear 43, a second gear 44, a transmission rod 45 and a rotating handle 46; one end of the screw rod 41 is installed in the side wall of the water supply tank 1 through a bearing, the other end of the screw rod 41 penetrates through the side wall of the water supply tank 1 and extends to the outside of the water supply tank 1, and the length direction of the screw rod 41 is the same as that of the second groove 13; the threaded cylinder 42 is sleeved on the screw rod 41 in a threaded manner, the threaded cylinder 42 is fixedly connected with the filter screen 2, and the side walls of the threaded cylinder 42 and the sleeve 31, which are far away from the through hole 12, are flush with the side wall of the filter screen 2; the first gear 43 is fixedly sleeved on the screw rod 41 and is positioned outside the water supply tank 1; the transmission rod 45 is mounted on the side wall of the water supply tank 1 through a bearing and is positioned below the first gear 43, the second gear 44 is sleeved on the transmission rod 45 and is meshed with the first gear 43, and the rotating handle 46 is fixedly sleeved on the transmission rod 45 and is positioned outside the second gear 44.

The rotating handle 46 is rotated to drive the second gear 44 to rotate through the transmission rod 45, the second gear 44 drives the screw rod 41 to rotate through the first gear 43, the screw rod 41 drives the threaded cylinder 42 to move on the screw rod 41, the threaded cylinder 42 drives the filter screen 2 to move in the water supply tank 1 and extend out of the through hole 12 to the outer side of the water supply tank 1, the cleaning condition of the filter screen 2 can be observed by a worker conveniently, meanwhile, the filter screen 2 drives the sleeve 31 to move on the support rod 3, and the guiding effect is achieved.

Referring to fig. 2, the cleaning member 5 includes a fixing plate 51, a plurality of first springs 52, and a scraper 53, the fixing plate 51 is horizontally and fixedly coupled to an outer wall of the water service box 1, and an upper end surface of the fixing plate 51 is flush with an upper end surface of the water service box 1; the first springs 52 are vertically and fixedly connected to the lower end surface of the fixed plate 51; the upper end surface of the scraper 53 is connected with the bottom ends of the first springs 52, the side wall of the scraper 53 facing the water supply tank 1 is abutted against the water supply tank 1, the lower end surface of the scraper 53 is provided with a scraper 531, and the scraper 531 is obliquely arranged and has the same inclination angle with the filter screen 2; thrust to scraper blade 53 through first spring 52 produces for scraper 531 hugs closely at the up end of filter screen 2, and when rotating handle 46 and driving screw 41 reverse motion, screw 41 passes through threaded cylinder 42 and drives the inside motion of filter screen 2 towards feed tank 1, and scraper 531 can scrape the grit that is located filter screen 2 top, clears up filter screen 2.

The two sides of the scraper 53 are respectively provided with a limiting part 6, and the limiting part 6 comprises an installation block 61, a first cross rod 62 and a first vertical rod 63; the first cross bar 62 is provided on the side wall of the water supply tank 1, and the first cross bar 62 is located on both sides of the scraper 53; the first vertical rod 63 is arranged at one end of the first cross rod 62 far away from the water supply tank 1, and the height of the first vertical rod 63 is greater than the distance from the lower end surface of the mounting block 61 to the upper end surface of the first cross rod 62; the mounting block 61 is arranged between the first vertical rod 63 and the side wall of the water supply tank 1, and the mounting block 61 is fixedly connected to the side wall of the scraper 53; when the scraper 53 slides along the side wall of the water service box 1, the movement locus of the mounting block 61 is defined by the first vertical bar 63 so that the scraper 53 is closely attached to the side wall of the water service box 1.

Referring to fig. 3 and 5, a cavity 14 is formed in the side wall of the water supply tank 1 on the same side as the second groove 13 and close to the cleaning member 5, a clamping member 7 is arranged in the cavity 14, and the clamping member 7 comprises a rotating plate 71, a clamping rod 72 and a second spring 73; the rotating plate 71 is placed in the cavity 14, a pin shaft 711 perpendicular to the support rod 3 horizontally penetrates through the middle of the rotating plate 71, and the pin shaft 711 is hinged to the inner side wall of the cavity 14; the clamping rod 72 is arranged on the outer wall of the water supply tank 1 in a penetrating manner, one end of the clamping rod 72 extends out of the outer side of the water supply tank 1 and is used for supporting the scraper 53, the other end of the clamping rod 72 is inserted into the cavity 14 and horizontally penetrates through a sliding rod 721, the sliding rod 721 is parallel to the pin shaft 711, and a sliding groove 712 for the sliding rod 721 is formed in the side wall of the rotating plate 71; the second spring 73 is positioned in the cavity 14 and abuts against the clamping rod 72; the click lever 72 is pressed from the outside of the water service box 1, the click lever 72 moves toward the inside of the cavity 14, and when the click lever 72 is completely entered into the side wall of the water service box 1, the blade 53 falls.

A second vertical rod 421 is vertically arranged on the arc-shaped side wall of the threaded cylinder 42, a second cross rod 422 is arranged on the upper end surface of the second vertical rod 421, a connecting hole 15 is formed in the side wall of the water supply tank 1, the cavity 14 is communicated with the second groove 13 through the connecting hole 15, and the second cross rod 422 is arranged in the connecting hole 15 in a penetrating manner and inserted into the cavity 14 to be abutted against the bottom end of the rotating plate 71; when the filter screen 2 needs to be pulled out, the second cross rod 422 moves on the screw rod 41 along with the threaded cylinder 42, then the second cross rod is inserted into the cavity 14 through the connecting hole 15, the lower end of the rotating plate 71 is pressed, the upper end of the rotating plate 71 rotates around the pin shaft 711, the rotating plate 71 drives the sliding rod 721 to slide in the sliding groove 712, meanwhile, the sliding rod 721 drives the clamping rod 72 to move towards the inside of the cavity 14, when the clamping rod 72 completely enters the side wall of the water supply tank 1, the scraper blade 53 falls down, and the cleaning efficiency of the filter screen 2 is improved.

The implementation principle of the farmland irrigation device in the embodiment of the application is as follows: after the user uses this irrigation device for a long time, need clear up filter screen 2. Firstly, the rotating handle 46 is rotated to drive the second gear 44 to rotate through the transmission rod 45, the second gear 44 drives the screw rod 41 to rotate through the first gear 43, the screw rod 41 drives the threaded cylinder 42 to move on the screw rod 41, the threaded cylinder 42 drives the filter screen 2 to move in the water supply tank 1 and penetrate out of the through hole 12, the filter screen 2 drives the sleeve 31 to move on the support rod 3 to play a guiding role, and meanwhile, the threaded cylinder 42 drives the second cross rod 422 to move on the screw rod 41; then the second cross bar 422 is inserted into the cavity 14, the lower end of the rotating plate 71 is pressed, the upper end of the rotating plate 71 rotates around the pin shaft 711, the rotating plate 71 drives the sliding rod 721 to slide in the sliding groove 712, at the same time, the sliding rod 721 drives the clamping rod 72 to move towards the inside of the cavity 14, when the clamping rod 72 completely enters the side wall of the water supply tank 1, the filter screen 2 reaches the maximum extension degree, finally the scraping plate 53 falls down along the side wall of the water supply tank 1, at this time, the mounting block 61 slides between the first vertical rod 63 and the side wall of the water supply tank 1, the first spring 52 generates pressure on the upper end surface of the scraping plate 53, so that the scraping blade 531 arranged on the lower end surface of the scraping plate 53 is tightly attached above the filter screen 2, then the filter screen 2 is pushed to return to the initial position, the scraping blade 531 cleans the filter screen 2, after the filter screen 2 enters the water supply tank 1, the above, and the cleaning condition of the filter screen 2 can be observed in time, and the cleaning effect of the filter screen 2 is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. Farmland irrigation device, including supply tank (1) and install filter screen (2) in supply tank (1), its characterized in that: a first groove (11) is formed in the inner side wall of the water supply tank (1) along the horizontal direction, a support rod (3) is installed in the first groove (11), the length direction of the support rod (3) is the same as that of the first groove (11), and one end of the support rod (3) is sleeved with a sleeve (31); the water supply tank (1) is far away from a through hole (12) for the filter screen (2) to penetrate is formed in the side wall of the sleeve (31), and the filter screen (2) is connected with the arc-shaped side wall of the sleeve (31).

2. The agricultural irrigation apparatus of claim 1, wherein: the utility model discloses a water supply tank, including water supply tank (1), screw rod (41), through-hole (12) are kept away from to screw rod (41), the lateral wall of filter screen (2) is located the coplanar, filter screen (2) with the arc lateral wall of screw rod (42) is connected to the lateral wall of screw rod (41) and screw rod (42) has been cup jointed to the one end of screw rod (41), screw rod (41) inner bearing is installed, the length direction of screw rod (41) with the length direction of second recess (13) is the same, the lateral wall that through-hole (12) was kept away from to screw rod (42), sleeve (31).

3. An agricultural irrigation apparatus according to claim 2, wherein: the horizontal height of the first groove (11) is higher than that of the second groove (13), and the filter screen (2) is obliquely arranged.

4. An agricultural irrigation apparatus according to claim 2, wherein: a cleaning component (5) positioned above the through hole (12) is mounted on the outer wall of the water supply tank (1), and the cleaning component (5) comprises a fixed plate (51) horizontally mounted on the outer wall of the water supply tank (1), a plurality of first springs (52) vertically mounted on the lower end face of the fixed plate (51) and a scraper (53) mounted at the bottom ends of the first springs (52); the scraper blade (53) towards the lateral wall of feed water tank (1) and feed water tank (1) butt, the bottom of scraper blade (53) and the up end butt of filter screen (2).

5. The agricultural irrigation apparatus of claim 4, wherein: the lower end surface of the scraper (53) is provided with a scraper (531).

6. The agricultural irrigation apparatus of claim 4, wherein: spacing part (6) are installed respectively to the both sides of scraper blade (53), spacing part (6) are including setting up installation piece (61) on scraper blade (53) lateral wall, setting up first horizontal pole (62) on feed tank (1) lateral wall and installing first montant (63) of keeping away from feed tank (1) one end at first horizontal pole (62), first montant (63) are restricted the slip of installation piece (61).

7. The agricultural irrigation apparatus of claim 4, wherein: a cavity (14) is formed in the side wall of the water supply tank (1) on the same side as the second groove (13) and close to the cleaning component (5), a clamping component (7) is arranged in the cavity (14), and the clamping component (7) comprises a clamping rod (72) penetrating through the side wall of the water supply tank (1) and a second spring (73) horizontally placed in the cavity (14); one end of the clamping rod (72) extends out of the water supply tank (1) and is used for supporting the scraper (53), and the other end of the clamping rod (72) is inserted into the cavity (14) and abuts against the second spring (73).

8. An agricultural irrigation apparatus according to claim 7, wherein: the clamping component (7) further comprises a rotating plate (71) placed in the cavity (14), a pin shaft (711) vertical to the supporting rod (3) is horizontally arranged in the middle of the rotating plate (71) in a penetrating mode, the pin shaft (711) is hinged to the inner side wall of the cavity (14), a sliding rod (721) is arranged at one end, inserted into the cavity (14), of the clamping rod (72), the sliding rod (721) is parallel to the pin shaft (711), a sliding groove (712) for the sliding rod (721) is formed in the side wall of one end, close to the sliding rod (721), of the rotating plate (71), a second vertical rod (421) is vertically installed on the arc-shaped side wall of the threaded cylinder (42), a second cross rod (422) is installed on the upper end face of the second vertical rod (421), the cavity (14) and the second groove (13) are communicated with each other through a connecting hole (15), and the second cross rod (422) is arranged in the connecting hole (15) in a penetrating mode, the second cross rod (422) is abutted against the bottom end of the rotating plate (71).