A kind of spray rod system and hang the deformation spraying of self-propelled warmhouse booth special-purpose multifunctional
Device
Technical field
The invention belongs to a kind of special sprayer unit of warmhouse booth, particularly relate to a kind of spray rod system and hang self-propelled
Warmhouse booth special-purpose multifunctional deformation sprayer unit, can regulate shower nozzle according to the morphosis of Target crops and size high
Degree, angle and shower nozzle, to the distance of Target crops, improve droplet penetrance in Target crops and deposition.
Background technology
The extensively application of warmhouse booth makes be not suitable for season or regional culture vegetable, fruit tree, the flowers etc. of open country plantation
Garden crop becomes reality, raw for being effectively improved the environmental condition of agricultural production, the anti-disaster ability improving agricultural and soil
Force of labor, increase farmers' income, uplifting the people's living standard all serves positive role.In traditional work, to sick in warmhouse booth
The pesticide application that pest control is carried out is to use the manual machine that sprays mostly, and production efficiency is the highest, and pesticide efficacy is low.
But along with the development of agricultural automation, manual pesticide application is the most little by little modernized, the pesticide application facility of automatization
Substituted.The most domestic warmhouse booth is usually the booth of steel construction, all arranges several steel constructions as whole booth
Supporting, therefore, hang the self-propelled facility that spray, work area covers big, and sprinkling irrigation uniformly, is not take up ground volume, makes full use of
Space, mechanization, automaticity are higher, are a kind of preferably spray irrigation in greenhouse machinery.
Equipment for plant protection the most progressively develops to safe and efficient and one-machine-multi-function direction, in spraying facility technical field, and spray boom
Structure and form determine the working performance sprayed and pest and disease damage control effect.Spray boom Main Function in sprayer unit is
Carrying shower nozzle and infusion pipeline, spraying land for growing field crops crops, such as Oryza sativa L., Semen Tritici aestivi etc., spray boom is many in yi word pattern, can roll over during transport
Folded;Spraying orchard crop, if tree etc., spray boom is many in tunnel type, sprays efficiency higher.But existing spray boom be applied to greenhouse
During booth, can only be for the morphosis of a certain particular target crop and size, structure function is single, it is empty to take ground
Between big, when warmhouse booth crop rotation Different Crop or cultivated area are difficult to promote the use of time narrow and small.
The present invention devises a crops being specifically designed to warmhouse booth and sprays facility, and these facility can be according to spraying target
The morphosis of mark object and size adjust the structure of spray boom, translation-angle and height, it is achieved for different crops
The function precisely sprayed, improve spraying penetrance and efficiency.
Chinese Patent Application No.: 201010132553.4, denomination of invention: the alternative approach of spraying machine spray lance and mechanism thereof,
Disclose the mechanism of the alternative approach of spraying machine spray lance.This invention mechanism is applicable to the field crop such as fruit tree and hedge frame type crop,
Match use with tractor, automotive fittings, and its complete machine function is simple, and package size is huge, it is adaptable to land for growing field crops operation, uncomfortable
For the warmhouse booth that airtight space, area are narrow and small.With this Patent Reference, the present invention is not only by the 0 of first, second swingle
~90 ° and-90 ° of the three, the 4th swingles~90 ° of reconfigurations, it is achieved the reconfiguration of three kinds of spray rod systems, Er Qiejie
Structure is simple, is not required to additionally arrange the traffic guide mechanism such as tractor, automobile, only need to be suspended on the steel knot supported as whole booth
On structure, space availability ratio is high, moreover, in conjunction with the lowering or hoisting gear of design, it is possible to achieve lifting position regulates, hangs in conjunction with shower nozzle
Hang device can realize higher spraying penetrance, deposition, it is achieved the spraying effect that penetrance is good, dispenser efficiency is high.
Summary of the invention
1. invention to solve the technical problem that
Can only carry out spraying, tying for the morphosis of a certain particular target crop and size for existing spray boom
Structure function singleness, take that ground space is big, be difficult to promote the use of time narrow and small when warmhouse booth crop rotation Different Crop or floor area
Etc. problem, the present invention provides a kind of spray rod system and hangs self-propelled warmhouse booth special-purpose multifunctional deformation sprayer unit, energy
Adapt to the target manipulating object of different shape structure in warmhouse booth, improve the effective rate of utilization of pesticide.
2. technical scheme
A kind of spray rod system, regulates the angle between spray boom and target and distance by parts arranged below, improves spray
Execute working performance and pesticide supplying effect;
Described spray rod system includes, hanger bar, fixing bar, the first swingle, the second swingle, the first expansion link, second
Expansion link, the 3rd swingle, the 4th swingle, the first screw mandrel silk braid device and the second screw mandrel silk braid device;Described hanger bar position
The bar that is used for being connected and fixed above fixing bar is allowed to be horizontal;Described first swingle passes through securing member and the first screw mandrel
Silk braid device is fixed on fixing bar one end, and first screw mandrel silk braid device one end is connected with hanger bar, and the other end and first rotates
Bar is connected;Described second swingle is fixed on the fixing bar other end by securing member and the first screw mandrel silk braid device respectively, the
One screw mandrel silk braid device one end is connected with hanger bar, and the other end and the second swingle are connected;3rd swingle and first is stretched
Contracting bar is connected by securing member and the second screw mandrel silk braid device, and second screw mandrel silk braid device one end is connected with the first expansion link
Connecing, the second screw mandrel silk braid device other end and the 3rd swingle are connected;4th swingle and the second expansion link pass through securing member
Being connected with the second screw mandrel silk braid device, second screw mandrel silk braid device one end is connected with the second expansion link, the second screw mandrel silk braid
The device other end and the 4th swingle are connected.
Fixing bar two ends welding rectangular steel pipe, and have two through holes being separated by 25mm, a diameter of 5mm thereon;?
One swingle, one end of the second swingle, have a longitudinal notch of certain lateral dimension, and have in the tube side of notch and be separated by
25mm, two through holes of a diameter of 5mm, make it possible to and fix bar two ends and couple accurately;It is connected and fixed at bolt the most simultaneously
Time, fixing bar can be made to be in same axis with the first swingle or the second swingle, after Bolt dismantling falls, by regulating the
One screw mandrel silk braid device, can make the first swingle or the second swingle rotate to angle (0 °~the 90 ° of scopes set around bolt
Adjustable).
The other end of the first swingle and one end of the first expansion link are connected, and the other end of the first swingle and first is stretched
One end of contracting bar has through hole, has, every 50mm, the through hole that aperture is 5mm, makes the first expansion link can move in the first swingle
Dynamic, and the axial restraint of two bars can be realized with pin.
The other end of the second swingle and one end of the second expansion link are connected, and the other end of the second swingle and second is stretched
One end of contracting bar has through hole, has, every 50mm, the through hole that aperture is 5mm, makes the second expansion link can move in the second swingle
Dynamic, and the axial restraint of two bars can be realized with securing member such as pin.
3rd swingle and the first expansion link are connected by a bolt and the second screw mandrel silk braid device, the first expansion link
One end one section of rectangular steel pipe of welding also has a through hole thereon, and one end of the 3rd swingle has longitudinal notch, and at groove
The tube side of mouth has through hole;After Bolt dismantling falls, regulate the second screw mandrel silk braid device, make the 3rd swingle be inserted in first and stretch
On the rectangular steel pipe that bar one end is welded with, it is achieved the 3rd swingle and the same axis of the first expansion link, leave at the 3rd swingle
During the steel pipe of one one section of undersized of expansion link, regulation bolt and the second screw mandrel silk braid device realize the 3rd swingle around bolt
Rotate to the angle (-90 °~90 ° of scopes adjustable) set.
4th swingle and the second expansion link are connected by a bolt and the second screw mandrel silk braid device, the second expansion link
One end one section of rectangular steel pipe of welding also has a through hole thereon, and one end of the 4th swingle has longitudinal notch, and at groove
The tube side of mouth has through hole.After Bolt dismantling falls, regulate the second screw mandrel silk braid device, make the 4th swingle be inserted in second and stretch
On the rectangular steel pipe that bar one end is welded with, it is achieved the 4th swingle and the same axis of the second expansion link, leave at the 4th swingle
During the steel pipe of two one section of undersized of expansion link, regulation bolt and the second screw mandrel silk braid device realize the 4th swingle around bolt
Rotate to the angle (-90 °~90 ° of scopes adjustable) set.
A kind of self-propelled warmhouse booth special-purpose multifunctional deformation sprayer unit that hangs: include that a kind of spray rod system, shower nozzle hang
Hang device, lowering or hoisting gear, offer power and the power barrow of walking and for controlling the control system of sprayer unit.Shower nozzle
Suspension arrangement screw is fixed on spray rod system, by regulation screw, makes shower nozzle suspension arrangement be fixed on spray rod system and determines
Position;Spray rod system is fixed in lowering or hoisting gear bottom by hanger bar;Lowering or hoisting gear is fixed in certainly by connecting rod and bolt
Walk in the fixed plate welded under formula car rack;Power barrow, is placed on the track of left and right by road wheel;Control spraying dress
The control system put is placed in inside power barrow.
Described shower nozzle suspension arrangement includes link and lower link, and the top of described upper link is provided with screw hole,
Shower nozzle suspension arrangement is realized in horizontal the fixing of spray boom by screw;Described lower link connects shower nozzle and piping installation,
The bottom of lower link is provided with shower nozzle pipeline fixed card slot, to be used for realizing shower nozzle fixing at lower link position;In upper company
Connecing frame and the connection place of lower link, upper link is provided with draw-in groove, and lower link is provided with fixed lobe, and joint bolt realizes together
Upper link and the stable connection of lower link, and after demounting bolt, it is possible to coordinate draw-in groove and projection to realize three angles
Rotation, it is achieved the spraying effect of three angles (-40 °, 0,40 °).
Described lowering or hoisting gear includes drive lead screw, connects mobile jib, connecting rod, the first fixed plate, and the second fixed plate connects
Plate, crane;First fixed plate, the second fixed plate are welded in power barrow frame lower, drive lead screw be connected mobile jib it
Between spiral connect, drive lead screw rotates and makes connection mobile jib move in the first fixed plate, connects mobile jib and drives connecting plate to rotate, real
Existing lowering or hoisting gear stretches.The design of lowering or hoisting gear utilizes planar linkage mechanism to realize the high efficiency of altitude mixture control, uses simultaneously
Screw-drive mechanism realizes the accurate of transmission and self-locking, and power is provided by reducing motor.
The control system of described control sprayer unit is placed in inside power barrow, by setting gait of march and stroke,
Just dolly can be made when spraying medicine operation to move by the track set, improve the automaticity spraying operation.Described control is sprayed
The control system of device is placed in inside power barrow, whether electric obtains by setting direct-acting electromagnetic valve, it is possible to achieve unilateral, double
Side spray effect.
3, beneficial effect
The self-propelled warmhouse booth special-purpose multifunctional deformation sprayer unit that hangs of the present invention is a kind of novel a tractor serves several purposes
Spray bar mechanism, spray boom can be according to spraying the difference of object, and the frame for movement of utilization own carries out its structure regulation.By regulation the
Three, the structure pose of the 4th swingle can make boom structure in " one " word formula and " door " road formula.During in " one " word formula, can spray
Executing the plant morphological characteristics such as flowers, Fructus Fragariae Ananssae is short smooth crop;During in " door " road formula, Fructus Vitis viniferae, Fructus Cucumidis sativi, Semen vignae sinensis etc. can be sprayed and plant
Strain is characterized as the crop of hedge frame type.By regulating first, second swingle and the structure pose of the three, the 4th swingles, permissible
Making spray boom in " U " word formula, can spray the plant morphological characteristics such as Fructus Lycopersici esculenti, Fructus Solani melongenae is to need support to support or the work of rope suspensions growth
Thing.Lowering or hoisting gear can also be regulated according to the morphosis and size that spray Target crops.Single unit system can realize
Boom structure and altitude mixture control, it is achieved the spraying effect that penetrance is good, dispenser efficiency is high.Meanwhile, it is suspended on as warmhouse booth
On the steel construction supported, being effectively utilized solid space, be not take up the ground space resource of preciousness, boom structure is simple, regulation
Convenient, it is adaptable to the spraying operation in warmhouse booth.
Accompanying drawing explanation
Fig. 1 is the suspension self-propelled warmhouse booth special-purpose multifunctional deformation sprayer unit boom structure change one of the present invention
The structural representation that spray boom is arranged in " one " word formula;
Fig. 2 is the suspension self-propelled warmhouse booth special-purpose multifunctional deformation sprayer unit boom structure change two of the present invention
One of structural representation that spray boom is arranged in " door " road formula;
Fig. 3 is the suspension self-propelled warmhouse booth special-purpose multifunctional deformation sprayer unit boom structure change two of the present invention
The two of the structural representation that spray boom is arranged in " door " road formula;
Fig. 4 is the suspension self-propelled warmhouse booth special-purpose multifunctional deformation sprayer unit boom structure change two of the present invention
The three of the structural representation that spray boom is arranged in " door " road formula;
Fig. 5 is the suspension self-propelled warmhouse booth special-purpose multifunctional deformation sprayer unit boom structure change three of the present invention
The structural representation that spray boom is arranged in " U " word formula;
Fig. 6 is the shower nozzle suspension arrangement II structural representation of the present invention;
In conjunction with accompanying drawing, the present invention is further described:
In accompanying drawing, the mark of each several part is as follows:
1-reducing motor, 2-shaft coupling, 3-transmission case, 4-1-single-deck friction-type electromagnetic clutch, 4-2-single-deck friction-type
Electromagnetic clutch, 5-1-sprocket wheel, 5-2-sprocket wheel, 6-1-chain, 6-2-chain, 7-drive shaft, 8-1-road wheel, 8-2-walks
Wheel, the left track of 9-1-, the right track of 9-2-, 10-1-sprocket wheel, 10-2-sprocket wheel, 11-drive lead screw, 12-connects mobile jib, and 13-connects
Bar, 14-1-the first fixed plate, 14-2-the second fixed plate, 15-frame, 16-connecting plate, 17-crane, 18-hanger bar, 19-
Fixing bar, 20-the first swingle, 21-the second swingle, 22-the first expansion link, 23-the second expansion link, 24-the 3rd swingle,
25-the 4th swingle, 26-the first screw mandrel silk braid device, 27-the second screw mandrel silk braid device, 28-bolt, 29-bolt, 30-spiral shell
Bolt, 31-bolt, 32-bolt, 33-bolt, 34-pin, 35-pin, 36-the first supply channel, 37-the second supply channel,
38-assists bridge, 39-pipe collar, the upper link of 40-, link under 41-, 42-direct-acting electromagnetic valve, 43-direct-acting electromagnetic valve.
Specific embodiment:
In order to describe the technology contents of the present invention, structural feature, realized purpose and effect in detail, below in conjunction with embodiment party
Formula also coordinates accompanying drawing explanation.
Embodiment 1
As shown in figs. 1 to 6, the present invention hang self-propelled warmhouse booth special-purpose multifunctional deformation sprayer unit power by
Reducing motor 1 provides, and reducing motor 1 connects the main shaft of transmission case 3 by shaft coupling 2, and power reaches transmission case 3, transmission case 3
Both sides affixed with single-deck friction-type electromagnetic clutch (4-1,4-2), single-deck friction-type electromagnetic clutch (4-1,4-2) is by controlling
Whether system controls its work, it is achieved single-power inputs double dynamical output, and realizes working independently.
As shown in Figures 1 to 3, single-deck friction-type electromagnetic clutch 4-1 affixed sprocket wheel 5-1, sprocket wheel 5-1 are by chain 6-1 even
Meet the sprocket wheel 5-2 in drive shaft 7, it is achieved the rotation of drive shaft 7, two ends affixed road wheel (8-1,8-of drive shaft 7
2), road wheel (8-1,8-2) is positioned on left track 9-1, right track 9-2, makes sprayer unit arrange along anterior-posterior horizontal direction
Left track 9-1, right track 9-2 move.
As shown in Figures 1 to 3, single-deck friction-type electromagnetic clutch 4-2 affixed sprocket wheel 10-1, sprocket wheel 10-1 pass through chain 6-2
Band movable sprocket 10-2 rotates, and sprocket wheel 10-2 is affixed with drive lead screw 11 one end, by controlling single-deck friction-type electromagnetic clutch 4-2
Whether realize the rotation of drive lead screw 11.
As shown in Figures 1 to 3, a kind of spray rod system, including hanger bar 18, fixing bar 19, the first swingle 20, second rotates
Bar the 21, first expansion link the 22, second expansion link the 23, the 3rd swingle the 24, the 4th swingle the 25, first screw mandrel silk braid device 26 and
Second screw mandrel silk braid device 27, described hanger bar 18 is positioned at above fixing bar 19 and is allowed to be in horizontal position for the bar 19 that is connected and fixed
Put;Described first swingle the 20, second swingle 21 is fixed on fixing bar 19 by bolt and the first screw mandrel silk braid device respectively
Two ends;3rd swingle 24 and the first expansion link 22 are connected by bolt and the second screw mandrel silk braid device 27, the 4th swingle
25 and second expansion link 23 be connected by bolt and the second screw mandrel silk braid device 27.
Fixing bar 19 two ends weld size is smaller, the rectangular steel pipe of a length of 60mm, and has two through holes thereon, logical
Hole is a diameter of 5mm, and is spaced apart 25mm between two through holes;In one end of first swingle the 20, second swingle 21, open
Having a longitudinal notch of lateral dimension, and have two through holes in the tube side of notch, through hole is a diameter of 5mm, and two through holes it
Between be spaced apart 25mm, be run through bolt and be connected accurately with fixing bar two ends;
The other end of the first swingle 20 and one end of the first expansion link 22 are connected, the other end of the first swingle 20 and
One end of first expansion link 22 has through hole, has through hole every 50mm, and the aperture of through hole is 5mm, makes the first expansion link can be
Move in first swingle, realized the axial restraint of two bars by pin 34;The other end and second of described second swingle 21
One end of expansion link 23 is connected, and the other end of the second swingle 21 and one end of the second expansion link 23 have through hole, every
50mm has through hole, and the aperture of through hole is 5mm, makes the second expansion link can move in the second swingle, is realized by pin 35
The axial restraint of two bars.
3rd swingle 24 and the first expansion link 22 are by a bolt (bolt 32) and the second screw mandrel silk braid device 27 phase
Coupling, first expansion link 22 one end weld size is smaller, one section of rectangular steel pipe of a length of 30mm, and has one thereon
Through hole, the longitudinal notch that one end of the 3rd swingle 24 has, and have through hole in the tube side of notch, disassemble at bolt 32
After, regulate the second screw mandrel silk braid device, make the 3rd swingle be inserted on the rectangular steel pipe that first expansion link one end is welded with, it is achieved the
Three swingles and the same axis of the first expansion link, when the 3rd swingle leaves the steel pipe of first one section of undersized of expansion link,
Regulation bolt 32 and the second screw mandrel silk braid device realize the 3rd swingle around bolt 32 rotate to set angle (-90 °~
90 ° of scopes are adjustable).
4th swingle 25 and the second expansion link 23 are by a bolt (bolt 33) and the second screw mandrel silk braid device 27 phase
Coupling, second expansion link 23 one end weld size is smaller, one section of rectangular steel pipe of a length of 30mm, and has one thereon
Through hole, one end of the 4th swingle 25 has a longitudinal notch, and the through hole having in the tube side of notch.Disassemble at bolt 33
After, regulate the second screw mandrel silk braid device, make the 4th swingle be inserted on the rectangular steel pipe that second expansion link one end is welded with, it is achieved the
Four swingles and the same axis of the second expansion link, when the 4th swingle leaves the steel pipe of second one section of undersized of expansion link,
Regulation bolt 33 and the second screw mandrel silk braid device realize the 4th swingle around bolt 33 rotate to set angle (-90 °~
90 ° of scopes are adjustable).
Hang self-propelled warmhouse booth special-purpose multifunctional deformation sprayer unit as it is shown in figure 1, a kind of, including spray rod system I,
Shower nozzle suspension arrangement II, lowering or hoisting gear III, provide power and the power barrow IV of walking and for controlling sprayer unit
Control system;Shower nozzle suspension arrangement II is fixed on spray rod system I;Spray rod system I is fixed in lowering or hoisting gear III by hanger bar
Bottom;Lowering or hoisting gear III is fixed under power barrow IV frame in the fixed plate of welding by connecting rod and bolt;Self-propelled
Dolly IV, is placed on left track 9-1 and right track 9-2 by road wheel;The control system controlling sprayer unit is placed in from walking
Formula dolly IV is internal.
Lowering or hoisting gear includes drive lead screw 11, connects mobile jib 12, connecting rod 13, the first fixed plate 14-1, the second fixed plate
14-2, connecting plate 16, crane 17;First fixed plate 14-1, the second fixed plate 14-2 are welded in power barrow frame 15 times
Portion, drive lead screw connects with being connected spiral between mobile jib, and drive lead screw rotates and makes connection mobile jib in the first fixed plate 14-1
Mobile, connect mobile jib and drive connecting plate to rotate, realize moving up and down of crane 17 by connecting plate 16, it is achieved lowering or hoisting gear is stretched
Contracting.
The control system controlling sprayer unit is placed in inside power barrow, by setting gait of march and stroke, just may be used
Make when spraying medicine operation dolly move by the track set, improve the automaticity spraying operation.Control the control of sprayer unit
System processed arranges direct-acting electromagnetic valve, whether electric obtains by setting direct-acting electromagnetic valve, it is possible to achieve unilateral, bilateral spraying effect
Really.
As shown in Figures 1 to 3, spray rod system is connected to the bottom of lowering or hoisting gear by hanger bar 18, and spray boom mainly includes fixing
Bar the 19, first swingle 20, the second swingle 21, the first expansion link 22, the second expansion link 23, the 3rd swingle 24, the 4th rotation
Bull stick 25, the first screw mandrel silk braid device 26, the second screw mandrel silk braid device 27, bolt (28,29,30,31,32,33), pin (34,
35)。
Embodiment 2
As it is shown in figure 1, when first swingle the 20, second swingle 21 is under bolt (28,29,30,31) is fixing, and fixing
Bar 19 keeps level, and the 3rd swingle the 24, the 4th swingle 25, under the second screw mandrel silk braid device 27 regulation, rotates to level,
Then in the 3rd swingle the 24, the 4th swingle 25 snaps in the thin rectangular square tube of first expansion link the 22, second expansion link 23 end,
Realizing spray boom is structure change " one " word formula, mainly can spray flowers, Fructus Fragariae Ananssae etc. and be characterized as the short smooth crop of plant.
Embodiment 3
As shown in figs. 2 to 4, when first swingle the 20, second swingle 21 is under bolt (28,29,30,31) is fixing, and
Fixing bar 19 keeps level, and the 3rd swingle the 24, the 4th swingle 25, under the second screw mandrel silk braid device 27 regulation, exits first
The thin rectangular square tube of expansion link the 22, second expansion link 23 end, centered by bolt (32,33) rotate, it is possible to achieve-90 °~
The rotation of 90 °, it is achieved spray boom is structure change " door " road formula, and mainly can spray the resemblances such as Fructus Vitis viniferae, Fructus Cucumidis sativi, Semen vignae sinensis is hedge
The crop of frame type.
Embodiment 4
As it is shown in figure 5, disassemble bolt (30,31), make first swingle the 20, second swingle 21 can be around bolt
(28,29) rotate 0~90 °, and the 3rd swingle the 24, the 4th swingle 25 is under the second screw mandrel silk braid device 27 regulation simultaneously, with
Rotate centered by bolt (32,33), it is possible to achieve-90 °~the rotation of 90 °, it is achieved spray boom is structure " U " word formula.Mainly spray
The plant morphological characteristics such as Fructus Lycopersici esculenti, Fructus Solani melongenae is to need support to support or the crop of rope suspensions growth.
For improve spray efficiency, set up in first supply channel the 36, second supply channel 37 direct-acting electromagnetic valve (42,
43), each direct-acting electromagnetic valve is respectively by electrical control gear control.
For ease of first supply channel the 36, second supply channel 37 fixing on bridge, and raising sprays efficiency,
Arranging auxiliary bridge 38 in spray boom, direct-acting electromagnetic valve (42,43) and first supply channel the 36, second supply channel 37 use pipe collar
39 are fixed on auxiliary bridge 38.
As shown in Figure 6, shower nozzle is fixed in the draw-in groove of lower hanger bracket by hydraulic pipeline, realizes the fixing of shower nozzle, spray
Head suspension device II includes that link 40 and lower link 41, the top of described upper link 40 are provided with screw hole, pass through spiral shell
Nail realizes shower nozzle suspension arrangement in horizontal the fixing of spray rod system;Described lower link 41 connects shower nozzle and piping installation,
The bottom of lower link 41 is provided with shower nozzle pipeline fixed card slot, is used for realizing shower nozzle fixing at lower link 41 position;Upper
Link 40 and the connection place of lower link 41, upper link 40 is provided with draw-in groove, and lower link 41 is provided with fixed lobe, in conjunction with spiral shell
Bolt realizes link 40 and the stable connection of lower link 41 together, and after demounting bolt, it is possible to coordinate draw-in groove and projection
Realize the rotation of three angles, it is achieved three angles-40 °, the spraying effect of 0,40 °.