CN112923179B

CN112923179B - Air dust sampling device for atmospheric monitoring

Info

Publication number: CN112923179B
Application number: CN202110100985.5A
Authority: CN
Inventors: 彭晶镭; 吴著江; 蔡学建; 江婷; 杨玲; 李力
Original assignee: Beijing Cert Environmental Resource Technology Co ltd
Current assignee: Beijing Cert Environmental Resource Technology Co ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2022-10-25
Anticipated expiration: 2041-01-26
Also published as: CN112923179A

Abstract

The invention discloses an air dust sampling device for atmospheric monitoring, which comprises a sampling box body and a sampler arranged in the sampling box body, wherein the sampler is telescopically arranged in the sampling box body along the vertical direction, a telescopic sampling head is designed in a hidden manner in a containing groove at the side part of the sampler, and the root part of the telescopic sampling head is connected with an angle adjusting mechanism and is driven by a driver to realize the change of a sampling angle. The sampler is telescopically arranged in the sampling box body, the worm and gear assembly is driven by the driving device to work, the worm and gear assembly drives the telescopic column to move up and down in the sliding groove of the fixed column, so that the sampler can slide out of the sampling box body, and can be contained in the sampling box body after use, so that the sampler is prevented from being located outdoors all the time and can form a certain protection effect on the sampler.

Description

Air dust sampling device for atmospheric monitoring

Technical Field

The invention relates to the technical field of atmosphere monitoring equipment, in particular to an air dust sampling device for atmosphere monitoring.

Background

Atmospheric monitoring, air monitoring, refers to fixed point, continuous or regularly sampling and measuring the pollutants that exist in the air, in order to monitor the air, generally establish a plurality of air monitoring point in a city, can use dust sampling device to sample the dust in the air usually to convenient analysis atmospheric data.

The existing air dust sampling device is exposed outdoors for a long time, the precision of the collecting head is reduced after the existing air dust sampling device is exposed outdoors for a long time, and the collecting head in the prior art can only collect at a fixed point, so that the action of the collecting head is not sensitive enough, and the collecting range of the collecting head has certain limitation.

Disclosure of Invention

The invention aims to provide an air dust sampling device for atmosphere monitoring, which aims to solve the technical problems.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an air dust sampling device for atmospheric monitoring, including the sampling box and set up in the inside sample thief of sampling box, the telescopic installation in vertical direction is followed to the sample thief inside the sampling box, hidden design has telescopic sampling head in the holding tank of sample thief lateral part, the root of telescopic sampling head is connected in angle adjustment mechanism and is realized the change of sampling angle through the driver drive.

Preferably, angle adjustment mechanism is including the transmission case, top, the front of transmission case are open structure, the transmission case bottom is formed with the breach, the transmission case is fixed with the cylinder mounting panel, transversely erect the second pivot in the transmission case, the both ends of second pivot all through the bearing with the inner wall of transmission case rotates to be connected, it has the fourth gear to fix the cover on the periphery of neighbouring arbitrary end in the second pivot, the top of fourth gear is provided with the first rack that meshes with it, first rack connects in the piston end of second cylinder, second cylinder fixed mounting is in on the cylinder mounting panel, be close to the bearing top of first rack one side has first limit slide rail through first leg joint, first rack nestification in be connected rather than sliding fit in first limit slide rail, the middle part of second pivot passes through the third pivot along vertical direction, be connected with U type frame in the third pivot, telescopic sampling head is installed the front end of U type frame.

Preferably, the fixed cover in the position department that is close to top or bottom of third pivot is equipped with the third gear, correspond on the U type frame the position department of third gear installs the third cylinder, the piston end of third cylinder is connected with the second rack, the second rack with the third gear meshes mutually, there is the spacing slide rail of second at the end of third pivot through first leg joint, the second rack with the spacing slide rail sliding fit of second is connected.

Preferably, the installation backplate is all installed along vertical direction in the inner wall both sides of holding tank, every all articulated first cylinder on the installation backplate, the output of first cylinder is connected with first gangbar, the other end fixed connection second gangbar of first gangbar, first gangbar with the junction of second gangbar articulates on the installation backplate, the end of second gangbar articulate in on the lateral wall of transmission box, it has the third gangbar that parallels with the second gangbar to articulate on the lateral wall of transmission box, the one end of third gangbar articulate in on the installation backplate, the other end of third gangbar along incline direction fixed connection fourth gangbar, two be connected through the connecting rod between the fourth gangbar, the sample thief corresponds it has the side cover plate to articulate on the lateral wall of holding tank, the side cover plate open its inboard support in the side cover plate connecting rod.

Preferably, the sampling box body is of a cubic structure, an opening at the top of the sampling box body is sealed through an upper cover, four corners of the bottom in the sampling box body are provided with fixed columns, a sliding groove is formed in the fixed columns along the vertical direction, the bottom of the sampler is correspondingly connected with a telescopic column, the telescopic column extends downwards and is inserted into the sliding groove, a bottom plate is connected between the fixed columns, a worm and gear assembly is connected onto the bottom plate through motor driving, and the worm and gear assembly is connected with the telescopic column and drives the telescopic column to slide in the sliding groove of the fixed column.

Preferably, the worm gear subassembly including with the threaded rod that motor output end drive is connected, distribute in the first gear of threaded rod both sides, motor fixed mounting is in the bottom of bottom plate, the threaded rod upwards runs through upwards extend respectively with two behind the bottom plate first gear meshes mutually, two first gear is all installed and is fixed in the backstop piece on the bottom plate, and every the wheel center department of first gear is fixed the first pivot of having cup jointed all, the edge of bottom plate is formed with the pivot support frame, first pivot runs through rotate behind the pivot support frame and has cup jointed first telescopic link, sliding connection has the second telescopic link in the first telescopic link, the second telescopic link other end extends to in the spout, and the second telescopic link pass through the articulated shaft with the bottom of flexible post is articulated.

The beneficial effects of the invention are as follows:

(1) The sampler is arranged in the sampling box body in a telescopic mode, the four corners of the bottom in the sampling box body are provided with fixed columns, sliding grooves are formed in the fixed columns in the vertical direction, the bottom of the sampler is correspondingly connected with the telescopic columns, the telescopic columns extend downwards and are inserted into the sliding grooves, the bottom plate is connected with a worm and gear assembly through motor driving, the worm and gear assembly is connected with the telescopic columns and drives the telescopic columns to slide in the sliding grooves of the fixed columns, when the device is used for dust collection operation, the worm and gear assembly is driven to work through a driving device, the worm and gear assembly drives the telescopic columns to move up and down in the sliding grooves of the fixed columns, the sampler can slide out of the sampling box body, the sampler can be contained in the sampling box body after being used, and the sampler is prevented from being located outdoors all the time and can form a certain protection effect on the sampler.

(2) The telescopic sampling head is connected with the angle adjusting mechanism, and the angle adjusting mechanism can adjust the position and the angle in a three-dimensional space under the same action of two gear and rack structures, so that the flexibility of the telescopic sampling head is improved, and the dust collecting operation at different positions can be met at one time.

(3) According to the invention, a transmission box body is designed in a hidden manner in the accommodating groove of the collector, one end of a first linkage rod is hinged with a first cylinder, the other end of the first linkage rod is fixedly connected with a second linkage rod, the joint of the first linkage rod and the second linkage rod is hinged on the back plate, the first cylinder drives the first linkage rod and the second linkage rod to rotate anticlockwise by taking a hinged point as a center, the second linkage rod drives the transmission box body to rotate upwards and hide in the accommodating groove, a third linkage rod parallel to the second linkage rod is hinged on the side wall of the transmission box body, one end of the third linkage rod is hinged on the mounting back plate, and the third linkage rod, the second linkage rod and the transmission box body form a three-link mechanism, so that the hidden folding and accommodating of the transmission box body are realized, the space occupation of the sampler is reduced on the whole, and the storage and management of the sampler are convenient. Meanwhile, the other end of the third linkage rod is fixedly connected with a fourth linkage rod along the inclined direction, the two fourth linkage rods are connected through a connecting rod, when the transmission box body rotates to be separated from the containing groove and then is in an unfolded state, the inner side panel of the side cover plate is supported on the connecting rod, so that the whole transmission box body is stably supported, and the smooth collecting operation of the telescopic sampling head is facilitated.

Drawings

Fig. 1 is a schematic structural diagram of an air dust sampling device for atmospheric monitoring according to the present invention;

FIG. 2 is a schematic diagram of an explosion structure of an air dust sampling device for atmospheric monitoring according to the present invention;

FIG. 3 is a schematic structural diagram of the sampling box of the air dust sampling device for atmospheric monitoring according to the present invention;

FIG. 4 is a schematic structural diagram of a bottom plate of the air dust sampling device for atmospheric monitoring according to the present invention;

fig. 5 is a schematic structural diagram of a first angle of an angle adjusting mechanism in the air dust sampling device for atmospheric monitoring according to the present invention;

fig. 6 is a schematic structural diagram of a second angle of an angle adjusting mechanism in the air dust sampling device for atmospheric monitoring according to the present invention.

In the figure: 1. sampling a box body; 2. an upper cover; 3. a fixing plate; 4. a support bar; 5. a sampler; 61. a telescopic column; 62. fixing a column; 621. a chute; 63. a base plate; 64. a motor; 65. a threaded rod; 66. a first gear; 67. a first rotating shaft; 68. a stop block; 69. a rotating shaft support frame; 610. a first telescopic rod; 611. a second telescopic rod; 7. a side cover plate; 8. accommodating grooves; 9. an angle adjusting mechanism; 10. a display screen; 11. hinging shafts; 12. mounting a back plate; 13. a first cylinder; 14. a first linkage rod; 15. a second linkage rod; 16. a third linkage rod; 17. a fourth link lever; 18. a connecting rod; 19. a transmission case body; 20. a cylinder mounting plate; 21. a second cylinder; 22. a first rack; 23. a second rotating shaft; 24. a first bracket; 25. a first limiting slide rail; 26. a third rotating shaft; 27. a U-shaped frame; 28. a third gear; 29. a third cylinder; 30. a second rack; 31. a second limiting slide rail; 32. a retractable sampling head; 33. a fourth gear.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary for explaining the invention type and should not be construed as limiting the invention type.

In the description of the invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the invention "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the invention can be understood by those of ordinary skill in the art as appropriate.

The invention provides an air dust sampling device for atmosphere monitoring, which comprises a sampling box body 1 and a sampler 5 arranged in the sampling box body 1, wherein the sampling box body 1 is fixed on a fixed plate 3 and is supported and fixed through three support rods 4 at the bottom of the sampling box body. Wherein sample thief 5 is along vertical direction telescopic installation inside sampling box 1, in using, open upper cover 2, personnel operate sample thief 5 and make it rise and arrange sampling box 1 outsidely, hidden design has telescopic sampling head 32 in the holding tank 8 of sample thief 5 lateral part, the root of telescopic sampling head 32 is connected in angle adjustment mechanism 9 and is realized the change of sampling angle through the driver drive, when utilizing the dust in the telescopic sampling head 32 collection air, pull out telescopic sampling head 32 from holding tank 8, then drive telescopic sampling head 32 through angle adjustment mechanism 9 and carry out the dust in the collection air of multi-angle in the space.

Specifically, as shown in fig. 5, the angle adjusting mechanism 9 in this embodiment includes a transmission case 19, the top and the front of the transmission case 19 are both of an open structure, a notch is formed at the bottom of the transmission case 19, the notch can prevent the telescopic sampling head 32 from rotating downward, a cylinder mounting plate 20 is fixed to the transmission case 19, a second rotating shaft 23 is transversely erected in the transmission case 19, both ends of the second rotating shaft 23 are rotatably connected to the inner wall of the transmission case 19 through bearings, a fourth gear 33 is fixedly sleeved on the circumferential surface of the second rotating shaft 23 adjacent to any one end, a first rack 22 meshed with the fourth gear 33 is arranged at the top of the fourth gear 33, the first rack 22 is connected to the piston end of the second cylinder 21, the second cylinder 21 is fixedly installed on the cylinder mounting plate 20, the top of the bearing near one side of the first rack 22 is connected to a first limit slide rail 25 through a first bracket 24, the first rack 22 is nested in the first limit slide fit connection with the first limit slide rail 25, the middle of the second rotating shaft 23 is vertically sleeved with a third rotating shaft 26, a U-shaped rack 27 is connected to the telescopic sampling head 32, and the second rotating shaft 23 is installed on the second rotating shaft 22, and the second rotating head rotating in the vertical direction, thereby driving the second rotating head rotating direction to drive the second rotating head rotating in which drives the second rotating direction to rotate.

Further, as shown in fig. 6, a third gear 28 is fixedly sleeved at a position of the third rotating shaft 26 close to the top or the bottom, a third cylinder 29 is installed at a position corresponding to the third gear 28 on the u-shaped frame 27, a second rack 30 is connected to a piston end of the third cylinder 29, the second rack 30 is engaged with the third gear 28, a second limit slide rail 31 is connected to a tail end of the third rotating shaft 26 through the first bracket 24, the second rack 30 is connected with the second limit slide rail 31 in a sliding fit manner, the third cylinder 29 drives the second rack 30 to extend and retract, the third gear 28 is engaged with the second rack 30 to drive the third rotating shaft 26 to rotate, so that the angular rotation adjustment of the telescopic sampling head 32 in the horizontal direction is realized, the telescopic sampling head 32 can realize the position and angle adjustment in a three-dimensional space under the common action of the two gear rack structures, so that the flexibility of the telescopic sampling head 32 is improved, which needs to be described in detail that the telescopic sampling head 32 adopts a mature prior art, and the connection relation with the sampler 5 and the working principle are not performed any more.

As shown in fig. 3, 5 and 6, mounting back plates 12 are mounted on two sides of the inner wall of the accommodating groove 8 along the vertical direction, a first cylinder 13 is hinged to each mounting back plate 12, an output end of each first cylinder 13 is connected with a first linkage rod 14, the other end of each first linkage rod 14 is fixedly connected with a second linkage rod 15, the joint of each first linkage rod 14 and the corresponding second linkage rod 15 is hinged to the corresponding mounting back plate 12, and the tail end of each second linkage rod 15 is hinged to the side wall of the transmission box 19. The first cylinder 13 drives the first linkage rod 14 and the second linkage rod 15 to rotate counterclockwise by taking a hinge point as a center, the second linkage rod 15 drives the transmission box body 19 to rotate upwards and hide into the accommodating groove 8, a third linkage rod 16 parallel to the second linkage rod 15 is hinged to the side wall of the transmission box body 19, one end of the third linkage rod 16 is hinged to the installation back plate 12, the third linkage rod 16, the second linkage rod 15 and the transmission box body 19 form a three-link mechanism, hidden folding and accommodating of the transmission box body 19 are achieved, meanwhile, a fourth linkage rod 17 is fixedly connected to the other end of the third linkage rod 16 in the inclined direction, the two fourth linkage rods 17 are connected through a connecting rod 18, the sampler 5 is hinged to a side cover plate 7 corresponding to the accommodating groove 8 through the side wall, after the side cover plate 7 is opened, when the transmission box body 19 is in an unfolded state after rotating to be separated from the accommodating groove 8, the inner side panel of the side cover plate 7 is supported on the connecting rod 18, so as to stably support the whole transmission box body 19, and smooth collecting operation of the telescopic sampling head 32 is facilitated.

As shown in fig. 1 and 2, the sampling box 1 in this embodiment is a cube structure, and the opening at the top of the sampling box is covered and sealed by the upper cover 2, four corners of the bottom in the sampling box 1 are provided with fixing columns 62, a chute 621 is formed in the fixing column 62 in the vertical direction, two sides of the chute 621 penetrate through the side wall of the whole fixing column 62, a telescopic column 61 is correspondingly connected to the bottom of the sampling device 5, the telescopic column 61 extends downwards and is inserted into the chute 621, a bottom plate 63 is connected between the fixing columns 62, the bottom plate 63 is connected with a worm and gear assembly through a motor 64 in a driving manner, the worm and gear assembly is connected with the telescopic column 61 and drives the telescopic column 61 to slide in the chute 621 of the fixing column 62, when the device is used for dust collection operation, the worm and drives the worm and gear assembly to work, the worm and gear assembly drives the telescopic column 61 to move up and down in the chute 621 of the fixing column 62, so that the sampling device 5 can slide out of the sampling box 1, the sampling box 1 can be accommodated in the sampling box 1 after use, and the sampling device is prevented from being outdoors all the time.

Further, as shown in fig. 4, the worm and gear assembly in this embodiment includes a threaded rod 65 drivingly connected to an output end of a motor 64, first gears 66 distributed on two sides of the threaded rod 65, the motor 64 is fixedly installed at the bottom of the bottom plate 63, the threaded rod 65 upwardly penetrates through the bottom plate 63 and then extends upward to be respectively engaged with the two first gears 66, the two first gears 66 are both installed in a stop block 68 fixed on the bottom plate 63, the stop block 68 can limit the positions of the two first gears 66 to prevent the two first gears 66 from moving in the axial direction of the first rotating shaft 67, so that the first gears 66 are always engaged with the threaded rod 65, a first rotating shaft 67 is fixedly sleeved at a wheel center of each first gear 66, a rotating shaft support bracket 69 is formed at an edge of the bottom plate 63, the first rotating shaft 67 penetrates through the rotating shaft support bracket 69 and then rotatably sleeves the first telescopic rod 610, a second telescopic rod 611 is slidably connected to the first telescopic rod 610, the other end of the second telescopic rod 611 extends into a chute 621, the second telescopic rod is hinged to the bottom of the telescopic column 61 through a hinge shaft 11, when the sampler 5 is used, the motor 64 drives the threaded rod 65 to rotate, the first telescopic rod 66 to drive the first telescopic rod to move the first telescopic rod 610 to drive the first telescopic rod 610 to move, and the first telescopic rod 62 to move linearly and finally to move along the first telescopic rod 610.

The invention provides an air dust sampling device for atmosphere monitoring, which is used for firstly opening an upper cover 2, starting a motor 64 to drive a threaded rod 65 to rotate, driving a first rotating shaft 67 to rotate by meshing a first gear 66 with the first rotating shaft, driving a first telescopic rod 610 to rotate in opposite directions by rotating the first rotating shafts 67 on two sides, extending a second telescopic rod 611 out of the first telescopic rod 610 to drive a telescopic column 61 to slide upwards along a sliding groove 621, driving a sampler 5 to slide upwards and extend out of a sampling box body 1, starting the sampler 5 to work, opening a side cover plate 7, observing a display screen 10 by a person, controlling a first air cylinder 13 to act by pressing a control button, retracting a piston rod of the first air cylinder 13 into a cylinder seat, driving a first linkage rod 14 and a second linkage rod 15 to rotate clockwise, so that a transmission box body 19 is separated from a containing groove 8 and rotates onto the side cover plate 7, finally forming a support for the first air dust sampling device through a connecting rod 18, and starting a second air cylinder 21 and a third air cylinder 29 to drive a telescopic sampling head 32 to adjust the angle and position in space to finish dust collecting operation on different collecting points.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.

Claims

1. The air dust sampling device for atmospheric monitoring is characterized by comprising a sampling box body and a sampler arranged in the sampling box body, wherein the sampler is telescopically mounted in the sampling box body along the vertical direction, a telescopic sampling head is designed in a hidden manner in a containing groove at the side part of the sampler, and the root of the telescopic sampling head is connected to an angle adjusting mechanism and is driven by a driver to realize the change of a sampling angle;

the angle adjusting mechanism comprises a transmission box body, the top and the front of the transmission box body are of an open structure, a notch is formed in the bottom of the transmission box body, a cylinder mounting plate is fixed on the transmission box body, a second rotating shaft is transversely erected in the transmission box body, two ends of the second rotating shaft are rotatably connected with the inner wall of the transmission box body through bearings, a fourth gear is fixedly sleeved on the circumferential surface of the second rotating shaft adjacent to any end, a first rack meshed with the fourth gear is arranged at the top of the fourth gear, the first rack is connected to the piston end of a second cylinder, the second cylinder is fixedly mounted on the cylinder mounting plate, the top of the bearing close to one side of the first rack is connected with a first limiting slide rail through a first support, the first rack is nested in the first limiting slide rail and is connected with the first limiting slide rail in a sliding fit manner, a third rotating shaft is sleeved in the middle of the second rotating shaft in the vertical direction through a bearing, a U-shaped frame is connected to the third rotating shaft, and the telescopic sampling head is mounted at the front end of the U-shaped frame;

the fixed cover in position department that is close to top or bottom of third pivot is equipped with the third gear, correspond on the U type frame the position department of third gear installs the third cylinder, the piston end of third cylinder is connected with the second rack, the second rack with the third gear meshes mutually, the end of third pivot has the spacing slide rail of second through first leg joint, the second rack with the spacing slide rail sliding fit of second is connected.

2. The air dust sampling device for atmosphere monitoring as recited in claim 1, wherein mounting back plates are mounted on two sides of an inner wall of the holding tank in a vertical direction, each mounting back plate is hinged with a first cylinder, an output end of the first cylinder is connected with a first linkage rod, the other end of the first linkage rod is fixedly connected with a second linkage rod, a joint of the first linkage rod and the second linkage rod is hinged on the mounting back plate, the tail end of the second linkage rod is hinged on a side wall of the transmission case, a third linkage rod parallel to the second linkage rod is hinged on a side wall of the transmission case, one end of the third linkage rod is hinged on the mounting back plate, the other end of the third linkage rod is fixedly connected with a fourth linkage rod in an inclined direction, two fourth linkage rods are connected through a connecting rod, the sampler is hinged on a side wall corresponding to the holding tank, and an inner side panel of the sampler is supported on the connecting rod after the side panel is opened.

3. The air dust sampling device for atmosphere monitoring as recited in claim 1, wherein the sampling box body is of a cubic structure, an opening at the top of the sampling box body is sealed by an upper cover, fixed columns are mounted at four corners of the bottom of the sampling box body, sliding grooves are formed in the fixed columns in the vertical direction, telescopic columns are correspondingly connected to the bottom of the sampler, the telescopic columns extend downwards and are inserted into the sliding grooves, a bottom plate is connected between the fixed columns, a worm and gear assembly is connected to the bottom plate through motor driving, and the worm and gear assembly is connected with the telescopic columns and drives the telescopic columns to slide in the sliding grooves of the fixed columns.

4. The air dust sampling device for atmospheric monitoring of claim 3, characterized in that, the worm gear subassembly including with the threaded rod that motor output end drive is connected, distribute in the first gear of threaded rod both sides, motor fixed mounting is in the bottom of bottom plate, the threaded rod upwards runs through upwards extend respectively with two behind the bottom plate first gear meshes mutually, two first gear is all installed and is fixed in the backstop block on the bottom plate, and every the wheel center department of first gear all fixed the first pivot of having cup jointed, the edge of bottom plate is formed with the pivot support frame, first pivot runs through rotate behind the pivot support frame, has cup jointed first telescopic link, sliding connection has the second telescopic link in the first telescopic link, the second telescopic link other end extends to in the spout, and the second telescopic link pass through the articulated shaft with the bottom of flexible post is articulated.