CN209268105U - A kind of soil nutrient irrigation rig for forestry afforestation - Google Patents

Abstract

The utility model discloses a kind of soil nutrient irrigation rig for forestry afforestation, the liquid feeding end of the outlet end connection infusion tube of infusion bag, the outlet end of infusion tube connects the infusion niidl.Drop pot is located in the middle part of the infusion tube, and infusion tube is divided into the upper tubing on the upside of the drop pot and the lower infusion tube on the downside of drop pot；The liquid in upper tubing is set to instill the drop pot, liquid enters in lower infusion tube from drop pot again.This is used for the soil nutrient irrigation rig of forestry afforestation, facilitate staff in the needs to trees long-term infusion, it avoids after nutrient raw material liq has conveyed in each infusion bag, nutrient raw material liq in infusion tube has also conveyed, the trapped air in infusion tube influences the transfusion effect of nutrient raw material liq.In order to which the nutrient raw material liq dripped in pot has conveyed, but can to avoid flowing back in nutrient raw material liq transmission process, influence nutrient irrigation rig using safe.

Description

A kind of soil nutrient irrigation rig for forestry afforestation

Technical field

The utility model designs the big trees soil nutrient of forestry afforestation and irrigates infusion device structure-design technique field, More particularly to a kind of soil nutrient irrigation rig for forestry afforestation.

Background technique

With the fast development of urban construction, for city greening at the very important working portion of municipal sector. But since the arboreal growth period is long, and demand is relatively more urgent, and poly- area is gathered especially for personnel.In order to meet greening Needs, generally use and transplant the modes of big trees and meet.But during transplanting, big tree root is bigger, can only cut Fall most of root system, is just able to satisfy transport.Root system it is badly damaged, being easy to happen trees can not survive, and especially part is precious Trees, the requirement of survival rate is higher.In order to guarantee survival rate, it usually needs be infused for a long time trees, or even in different things Feelings, the nutrient raw material for being infused different.Soil nutrient irrigation rig exists in the prior art, but existing irrigation rig exists, After each infusion bag has used, air can be entered in infusion tube, influences the use of next-generation infusion bag；And the prior art Soil nutrient irrigate there is also liquid can not anti-backflow, be easy to happen liquid reflux pollution infusion bag in nutrient material liquid The defect of body.

It can be seen that soil nutrient irrigation rig in the prior art, which exists, not can avoid nutrient raw material row in infusion tube It is complete, and can not place liquid reflux cause pollute infusion bag nutrient raw material defect.

Utility model content

In view of this, the main purpose of the utility model is to provide one kind can in infusion tube reserved part nutrient Raw material liq avoids infusion tube from entering air, influences transfusion effect, and can planting trees for forestry to avoid liquid reflux The soil nutrient irrigation rig of afforestation.

In order to achieve the above objectives, the technical solution of the utility model is achieved in that

A kind of soil nutrient irrigation rig for forestry afforestation, comprising: infusion bag, infusion tube and transfusion needle Head, the liquid feeding end of the outlet end connection infusion tube of the infusion bag, the outlet end of the infusion tube connect the transfusion needle Head, further includes: drop pot；The drop pot is located in the middle part of the infusion tube, and the infusion tube is divided on the upside of the drop pot Upper tubing and the lower infusion tube on the downside of the drop pot；The liquid in the upper tubing is set to instill the drop pot, liquid is again Enter in lower infusion tube from drop pot.

In a preferred embodiment, the drop pot includes: drop pot ontology, single-pass liquid discharge device；The single-pass goes out Liquid device is divided into single-pass feeding device and lower single-pass feeding device；The inlet of the drop pot ontology connect the upper single-pass into The liquid outlet of liquid device, the drop pot ontology connects the lower single-pass feeding device.

In a preferred embodiment, the single-pass liquid discharge device includes: infusion pipeline, single-pass cavity, one-way valve And suspension ball；The infusion pipeline of the upper single-pass feeding device pass through it is described drop pot ontology inlet, the lower single-pass into The infusion pipeline of liquid device passes through the drop pot ontology liquid outlet, and the sealed connection with the inlet or liquid outlet, described Connection is connected with upper tubing for the infusion pipeline of upper single-pass feeding device, and the infusion pipeline of the lower single-pass feeding device is defeated under Liquid pipe conducting connection；The infusion pipeline is in open-like shape in described drop pot body interior one end, and integrated with the single-pass cavity It forms or is fixedly connected, the one-way valve is set in the single-pass inside cavity, in the single-pass cavity far from infusion pipeline One end open up telescopic hole, telescopic rod is set inside the telescopic hole, and the both ends of the telescopic rod are separately connected the single-pass Valve and the suspension ball move the suspension ball and the one-way valve integrally upwardly or downwardly.

In a preferred embodiment, the one-way valve is conical in cambered surface close to the side of the infusion pipeline, It is adapted with the open end structure of the infusion pipeline.

In a preferred embodiment, the one-way valve side is at least fixedly connected with or is integrally formed two guiding Protrusion；The guide protrusions position setting guiding slot port is corresponded in the single-pass cavity.

In a preferred embodiment, single-pass cavity side be arranged liquid through slot, the liquid through slot with Guiding slot port position axial symmetry.

In a preferred embodiment, the liquid through slot is identical with the guiding slot port structure snd size.

In a preferred embodiment, the density of material of the one-way valve is greater than the density of irrigation liquid, described outstanding The density of material of floating ball is less than the density of irrigation liquid.

In a preferred embodiment, the infusion niidl includes: to prick hole syringe needle and anti-blocking syringe needle, the anti-blocking needle Head is located at bundle hole needle wall, and bundle hole needle tip portion is pointed, and the anti-blocking needle tip portion is fixedly connected with branch Support arrangement, the support device are more supporting wires, and the both ends of the every supporting wire are respectively fixedly connected with described anti-blocking Needle tip portion.

In a preferred embodiment, the rear end of the anti-blocking syringe needle is fixedly connected with or is integrally formed the first needle Seat, the infusion tube are removably attachable to inside first needle stand；It is described prick hole syringe needle rear end be fixedly connected or Person is integrally formed the second needle stand, and second needle stand is connect with the first needle stand removable seal, makes the anti-blocking needle end The supporting wire in portion stretches out bundle hole needle tip portion.

In a preferred embodiment, the supporting wire is memory metal.

In a preferred embodiment, it is 1~3mm that the support device, which stretches out the length of the anti-blocking syringe needle,.

The soil nutrient irrigation rig for forestry afforestation of the utility model, has the following beneficial effects:

This is used for the soil nutrient irrigation rig of forestry afforestation, comprising: infusion bag, infusion tube and infusion niidl, The liquid feeding end of the outlet end connection infusion tube of infusion bag, the outlet end of infusion tube connect infusion niidl, further includes: drop pot； Drop pot is located in the middle part of infusion tube, and infusion tube is divided into the upper tubing on the upside of drop pot and the lower infusion tube on the downside of drop pot； The liquid in upper tubing is set to instill drop pot, liquid enters in lower infusion tube from drop pot again.It solves in the prior art, planted trees Cheng Zhong during especially transplanting big trees, since soil nutrient is insufficient or trees incomplete absorption, is needed to trees soil During nutrient is irrigated；Irrigation rig structure is single, after nutrient raw material liq has used in infusion bag, cannot achieve defeated Reserved part nutrient raw material liq, causes infusion tube to enter air in liquid hose, influences the defect of transfusion effect；And make With in the process, existing irrigation rig does not have one kind it is former can be easy nutrient in pollution infusion bag to avoid the device of liquid reflux Feed liquid body.This is used for the soil nutrient irrigation rig of forestry afforestation, facilitates staff in the need to trees long-term infusion It wants, after liquid has used in infusion bag, drips the single-pass device in pot and guarantee that liquid is kept in infusion tube, guarantee nutrient The transfusion effect of raw material liq；The back-flow preventer in pot is dripped, and can be to avoid occurring back in nutrient raw material liq transmission process Stream, guarantee nutrient irrigation rig using safe.

Detailed description of the invention

Fig. 1 is the soil nutrient irrigation rig structural representation for forestry afforestation according to a kind of embodiment of the disclosure Figure；

Fig. 2 is the drop pot according to a kind of soil nutrient irrigation rig for forestry afforestation of embodiment of the disclosure Cross-sectional view；

Fig. 3 is anti-according to a kind of drop pot of the soil nutrient irrigation rig for forestry afforestation of embodiment of the disclosure Structural schematic diagram when reflux；

Fig. 4 is the bundle hole needle according to a kind of soil nutrient irrigation rig for forestry afforestation of embodiment of the disclosure Header structure schematic diagram；

Fig. 5 is the anti-blocking needle according to a kind of soil nutrient irrigation rig for forestry afforestation of embodiment of the disclosure Header structure schematic diagram；

Fig. 6 is the bundle hole needle according to a kind of soil nutrient irrigation rig for forestry afforestation of embodiment of the disclosure Structural schematic diagram when head and anti-blocking syringe needle link together.

[primary clustering symbol description]

10, infusion bag, 20, infusion tube, 201, upper tubing, 202, lower infusion tube；

30, infusion niidl, 11, bundle hole syringe needle, the 111, second needle stand；

12, anti-blocking syringe needle, 121, support device, the 122, first needle stand；

40, pot, 401, drop pot ontology are dripped；

3, single-pass liquid discharge device, 301, upper single-pass feeding device, 302, lower single-pass feeding device；

31, suspension ball, 32, telescopic rod, 33, one-way valve, 331, guide protrusions, 34, infusion pipeline, 35, single-pass cavity, 351, guiding slot port.

Specific embodiment

With reference to the accompanying drawing and soil of the embodiments of the present invention to the utility model for forestry afforestation Nutrient irrigation rig is described in further detail.

It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.

It should be noted that the description and claims of this application and term " first " in above-mentioned attached drawing, " Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way Data be interchangeable under appropriate circumstances, so that presently filed embodiment described herein for example can be in addition to herein Sequence other than those of diagram or description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that Be to cover it is non-exclusive include, for example, containing the process, method, system, product or equipment of a series of steps or units not Those of be necessarily limited to be clearly listed step or unit, but may include be not clearly listed or for these processes, side The intrinsic other step or units of method, product or equipment.

For ease of description, spatially relative term can be used herein, as " ... on ", " ... top ", " ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure Except different direction in use or operation.For example, being described as if the device in attached drawing is squeezed " in other devices It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction " Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and " in ... lower section " two kinds of orientation.The device can also be positioned with other different modes and (is rotated by 90 ° or in other orientation), and And respective explanations are made to the opposite description in space used herein above.

As shown in Figure 1, Figure 2 and Figure 3, soil nutrient irrigation rig for being used for forestry afforestation, comprising: for holding The infusion bag 10 of nutrient raw material liq, to inside infusion bag 10 nutrient raw material liq transmission infusion tube 20 and prick in trees The upper infusion niidl 30 that nutrient is transmitted for trees.It is fixedly connected with link on the upside of infusion bag 10, conveniently hangs on branch.Infusion bag The liquid feeding end of 10 outlet end connection infusion tube 20, the outlet end of infusion tube 20 connect infusion niidl 30, make nutrient raw material Liquid stores in infusion bag 10, by infusion tube 20, flows out in the end of infusion niidl 30, into trees, mentions for trees For sufficient nutrient.In order to facilitate staff in the needs to trees long-term infusion, the nutrient in each infusion bag 10 is avoided After raw material liq has conveyed, the nutrient raw material liq in infusion tube 20 has also been conveyed, the trapped air in infusion tube 20, When having changed infusion bag 10, in infusion tube 20, air is retained between nutrient raw material liq and infusion niidl 30, has influenced to support The transfusion effect of part raw material liq.The irrigation rig further include: drop pot 40；Drop pot 40 is located at 20 middle part of infusion tube, is infused soft Pipe 20 divides for the lower infusion tube (202 in the upper tubing 201 of 40 upside of drop pot and in 40 downside of drop pot；Make upper tubing (201 In liquid instill drop pot 40, liquid again from drop pot 40 enter lower infusion tube 202 in.Pass through setting sealing dress inside drop pot 40 It sets, the nutrient raw material liq for keeping drop pot 40 temporary has not conveyed, and a part is reserved, to keep the nutrient in lower infusion tube 202 former Feed liquid body is full of, and is avoided conveying air during conveying nutrient to trees, is influenced nutrient conveying effect.

Fig. 1 is to drip the liquid level in pot 40 in normal infusion process and be in drop 40 middle part state of pot；

After Fig. 2 has used for nutrient raw material liq in infusion bag 10, drop pot 40, which realizes, avoids air from entering lower infusion Structural schematic diagram when pipe 202；

Fig. 3 is that drop pot 40 realizes placement liquid reflux status architecture schematic diagram, i.e., liquid is full of drop pot 40 (preferably drop pot 3-4 double-length having a size of single-pass liquid discharge device 3), realize anti-return effect.

Drop pot 40 includes: the single-pass liquid discharge device 3 for dripping pot ontology 401, playing the role of sealing.Not only in drop pot 40 Nutrient raw material liq has conveyed, and can influence nutrient irrigation rig to avoid flowing back in nutrient raw material liq transmission process Using safe.The single-pass liquid discharge device 3 divides for upper single-pass feeding device 301 and lower single-pass feeding device 302；Drip pot ontology 401 inlet connects upper single-pass feeding device 301, and the liquid outlet of drop pot ontology 401 connects lower single-pass feeding device 302；When When liquid level is lower than the sealing liquid level of lower single-pass feeding device 302, the lower single-pass feeding device 302 is sealed, and makes to drip in pot 40 Nutrient raw material liq does not flow to the lower infusion tube 202, so that making to drip nutrient raw material liq in pot 40 retains a part.Work as liquid level Higher than upper single-pass feeding device 301 sealing liquid level when, the upper single-pass feeding device 301 seals, and makes to drip the nutrient in pot 40 Raw material liq does not flow back to the upper tubing 201, reduces the nutrient raw material liq of withdrawing fluid pollution infusion bag 10.

In order to realize the effect of single-pass, guarantee to wrap in use process with the use of safety and precise, single-pass liquid discharge device 3 It includes: the single-pass cavity 35 and one-way valve 33 that the infusion pipeline 34 of connection is connected with infusion tube, primarily serves single-pass effect, and Assist one-way valve 33 is mobile to realize the effect of single-pass down or the up suspension ball 31 of single-pass effect.Upper single-pass feeding device 301 infusion pipeline 34 passes through the inlet of drop pot ontology 401, and the infusion pipeline 34 of lower single-pass feeding device 302 passes through drop pot 401 liquid outlet of ontology, and the sealed connection with inlet or liquid outlet, the infusion pipeline 34 of upper single-pass feeding device 301 with it is upper Infusion pipeline 34 and lower infusion tube 202 conducting of the conducting connection of perfusion tube 201, lower single-pass feeding device 302 connect.Perfusion tube Road 34 is in open-like shape in drop 401 inside one end of pot ontology, and is integrally formed or is fixedly connected with single-pass cavity 35, in single-pass One-way valve 33 is set inside cavity 35, telescopic hole is opened up far from one end of infusion pipeline 34 in single-pass cavity 35, in telescopic hole Telescopic rod 32 is arranged in portion, and the both ends of telescopic rod 32 are separately connected one-way valve 33 and suspension ball 31, make suspension ball 31 and one-way valve 33 One upwardly or downwardly moves.The density of material of one-way valve 33 is greater than the density of irrigation liquid, the density of material of suspension ball 31 Less than the density of irrigation liquid；To the downward effect of one-way valve 33, when on nutrient raw material liq, floating pushes away suspension ball 31 Dynamic one-way valve 33 upwards, realizes the upwardly or downwardly movement of one-way valve 33, realizes the effect of one-way conduction.

In order to better meet sealing function, guarantee that single-pass effect, the one-way valve 33 are in close to the side of infusion pipeline 34 Cambered surface cone is adapted with the open end structure of infusion pipeline 34.

In order to further ensure sealing function, avoid one-way valve 33 in moving process, run-off the straight influences sealing effect Fruit.33 side of one-way valve is at least fixedly connected with or is integrally formed two guide protrusions 331；In the corresponding guiding of single-pass cavity 35 Guiding slot port 351 is arranged in raised 331 positions.

In order to avoid single-pass cavity 35 hinders the flowing of nutrient raw material liq, guarantee that the flowing of nutrient raw material liq is unimpeded, Liquid through slot, liquid through slot and 351 position axial symmetry of guiding slot port is arranged in 35 side of single-pass cavity.Guarantee entire single-pass cavity 35 integral strengths are uniform, guarantee service life.

Preferably, liquid through slot is identical with 351 structure snd size of guiding slot port.In specific installation and use process, by It is identical with 351 structure snd size of guiding slot port in liquid through slot, it can be convenient worker and install and use, by liquid through slot and guide groove Mouth 351 obscures use, reduces installation requirement.

As shown in Figure 4, Figure 5 and Figure 6, it before for tree-feeding nutrient raw material liq, needs through syringe needle in bark surface Hole is pricked, but is pricked during hole, since trees fiber is harder, fiber is easy to fill in the hole of syringe needle, so that syringe needle can not It uses.In order to avoid the blocking of syringe needle, which includes: that bundle hole syringe needle 11 and anti-blocking syringe needle 12, anti-blocking syringe needle 12 are set It is pricking inside hole syringe needle 11, bundle 11 front end of hole syringe needle is pointed, and anti-blocking 12 front end of syringe needle is fixedly connected with support device 121, Support device 121 is more supporting wires, and the both ends of every supporting wire are respectively fixedly connected in anti-blocking 12 front end of syringe needle.? In use process, hole syringe needle 11 is pricked in bark surface and pricks hole, anti-blocking syringe needle 12 is being pricked inside hole syringe needle 11, before anti-blocking syringe needle 12 End does not stretch out the front end for pricking hole syringe needle 11 (that is: in disengaging between bundle hole syringe needle 11 and the needle stand of anti-blocking syringe needle 12 State), it is blocked by anti-blocking syringe needle and pricks hole needle wall, the blocking of trees fiber is avoided to prick hole syringe needle 11.It ensure that and prick hole syringe needle 11 bundle hole success rate reduces the damage to trees, worker is facilitated to install and use.

Preferably, the rear end of anti-blocking syringe needle 12 is fixedly connected with or is integrally formed the first needle stand 122, and infusion tube 20 is removable Unload be connected to the inside of the first needle stand 122 (it is preferred, be fixedly connected with plug in 20 end of infusion tube, by plug with it is described First needle stand 122 is detachably connected)；The rear end for pricking hole syringe needle 11 is fixedly connected with or is integrally formed the second needle stand 111, and second Needle stand 111 is connect with 122 removable seal of the first needle stand, before so that the supporting wire of anti-blocking 12 end of syringe needle is stretched out bundle hole syringe needle 11 End.By supporting wire to the fiber support for pricking 11 end of hole syringe needle, the transmission of nutrient raw material liq preferably ensure that, Also a possibility that further reduced to the blocking of hole syringe needle 11 is pricked.

Preferably, supporting wire is memory metal.

Preferably, it is 1~3mm that support device 121, which stretches out the length of anti-blocking syringe needle 12,.

The above, the only preferred embodiment of the utility model, are not intended to limit the protection of the utility model Range.

Claims (10)

1. a kind of soil nutrient irrigation rig for forestry afforestation, comprising: infusion bag (10), infusion tube (20) and defeated Liquid syringe needle (30), the liquid feeding end of outlet end connection infusion tube (20) of the infusion bag (10), the infusion tube (20) Outlet end connects the infusion niidl (30), which is characterized in that further include: drop pot (40)；The drop pot (40) is located at described defeated In the middle part of liquid hose (20), the infusion tube (20) is divided into the upper tubing (201) dripped on the upside of pot (40) and described Drip the lower infusion tube (202) on the downside of pot (40)；The liquid in the upper tubing (201) is set to instill the drop pot (40), liquid Enter in lower infusion tube (202) from drop pot (40) again；

The drop pot (40) includes: drop pot ontology (401), single-pass liquid discharge device (3)；The single-pass liquid discharge device (3) is divided into Single-pass feeding device (301) and lower single-pass feeding device (302)；The inlet of drop pot ontology (401) connects the upper list The liquid outlet of logical feeding device (301), drop pot ontology (401) connects the lower single-pass feeding device (302)；

The single-pass liquid discharge device (3) includes: infusion pipeline (34), single-pass cavity (35), one-way valve (33) and suspension ball (31)；The infusion pipeline (34) of the upper single-pass feeding device (301) passes through the inlet of drop pot ontology (401), described The infusion pipeline (34) of lower single-pass feeding device (302) pass through drop pot ontology (401) liquid outlet, and with the inlet or The sealed connection of liquid outlet, the infusion pipeline (34) of the upper single-pass feeding device (301) and upper tubing (201) conducting connect It connects, the infusion pipeline (34) of the lower single-pass feeding device (302) and lower infusion tube (202) conducting connect；The infusion pipeline (34) it is in open-like shape in the internal one end of the drop pot ontology (401), and is integrally formed or fixes with the single-pass cavity (35) The one-way valve (33) is arranged in connection inside the single-pass cavity (35), in the single-pass cavity (35) far from infusion pipeline (34) one end opens up telescopic hole, and telescopic rod (32) are arranged inside the telescopic hole, the both ends difference of the telescopic rod (32) Connect the one-way valve (33) and the suspension ball (31), make the suspension ball (31) and the one-way valve (33) one upwards or Person moves downward.

2. the soil nutrient irrigation rig according to claim 1 for forestry afforestation, which is characterized in that the list Port valve (33) is in cambered surface cone, the open end structure with the infusion pipeline (34) close to the side of the infusion pipeline (34) It is adapted.

3. the soil nutrient irrigation rig according to claim 1 for forestry afforestation, which is characterized in that the list Port valve (33) side is at least fixedly connected with or is integrally formed two guide protrusions (331)；It is corresponding in the single-pass cavity (35) Guiding slot port (351) are arranged in guide protrusions (331) position.

4. the soil nutrient irrigation rig according to claim 3 for forestry afforestation, which is characterized in that described Liquid through slot, the liquid through slot and the guiding slot port (351) position axial symmetry is arranged in single-pass cavity (35) side.

5. the soil nutrient irrigation rig according to claim 4 for forestry afforestation, which is characterized in that the liquid Body through slot is identical with the guiding slot port (351) structure snd size.

6. the soil nutrient irrigation rig according to claim 1 for forestry afforestation, which is characterized in that the list The density of material of port valve (33) is greater than the density of irrigation liquid, and the density of material of the suspension ball (31) is less than the close of irrigation liquid Degree.

7. the soil nutrient irrigation rig according to claim 1 for forestry afforestation, which is characterized in that described defeated Liquid syringe needle (30) includes: that bundle hole syringe needle (11) and anti-blocking syringe needle (12), the anti-blocking syringe needle (12) are located at bundle hole syringe needle (11) internal, bundle hole syringe needle (11) front end is pointed, and anti-blocking syringe needle (12) front end is fixedly connected with support device (121), the support device (121) is more supporting wires, and the both ends of the every supporting wire are respectively fixedly connected with described Anti-blocking syringe needle (12) front end.

8. the soil nutrient irrigation rig according to claim 7 for forestry afforestation, which is characterized in that described anti- The rear end of stifled syringe needle (12) is fixedly connected or is integrally formed the first needle stand (122), and the infusion tube (20) removably connects It connects internal in first needle stand (122)；The rear end for pricking hole syringe needle (11) is fixedly connected with or is integrally formed the second needle Seat (111), second needle stand (111) connect with the first needle stand (122) removable seal, make the anti-blocking syringe needle (12) The supporting wire of end stretches out bundle hole syringe needle (11) front end.

9. the soil nutrient irrigation rig according to claim 8 for forestry afforestation, which is characterized in that the branch Support wire is memory metal.

10. the soil nutrient irrigation rig according to claim 8 for forestry afforestation, which is characterized in that described The length that support device (121) stretches out the anti-blocking syringe needle (12) is 1~3mm.