CN2814960Y

CN2814960Y - Piston-type infiltration irrigation needle valve

Info

Publication number: CN2814960Y
Application number: CN 200520051597
Authority: CN
Inventors: 杨博浪; 杨安
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-08-08
Filing date: 2005-08-08
Publication date: 2006-09-13
Anticipated expiration: 2015-08-08

Abstract

The utility model relates to a piston-type infiltrating and irrigating needle valve which is formed by connecting with a valve body, a valve needle, elastic sealing rings, a support plate, a lamination piston, a locking component, a compensating piston, an elastic sealing ring, an elastic force film, a closing cap of a water outlet, etc., wherein the lamination piston is orderly laminated by a plurality of piston rings and elastic sealing rings; the support plate is provided with a water inlet hole and a transversal water circulating guide slot; a vertical water circulating guide slot is arranged on the inner wall of the valve body; the valve needle is provided with a vertical water outlet guide slot; the piston rings are provided with water circulating curve slots. The utility model can be installed on the terminal infiltrating and irrigating openings of an infiltrating and irrigating system in work areas, such as field and garden cultivation, dry soil implantation, fell forestation, sand prevention, sand control, etc., and can be served as a valve opening of a water infiltrating valve. The utility model has the functions of negative pressure automatic closure to efficiently prevent the terminal infiltrating and irrigating opening blocking so as to guarantee the straightway main flow water delivery and liquid deliver media, and meanwhile, to ensure the infiltrating and irrigating effects that water supply and liquid supply are stable and uniform when the pressure and the landform of the water supply or the liquid supply change so as to promote the advanced automatic infiltrating and irrigating technology being extensively popularized.

Description

Piston type needle valve for infiltration irrigation

Technical field

The utility model relates to and a kind ofly acts on the piston unidirectional fluid-delivery valve to activate by fluid media (medium), specifically, relates to a kind of piston type needle valve for infiltration irrigation.

Background technology

In rural area cultivation, non-irrigated native plantation, afforestation and the operation process of defending and controlling sand, adopt sub-irrigation valve (or underground drip irrigation valve) to give the transfusion of watering of soil and crop automatically in a large number.But the problem that existing infiltration irrigation technology exists for a long time is, first, when in order satisfy to irrigate needs or when cutting off the water suddenly, certainly lead to negative pressure in the water delivery transfusion system, and because the suction-operated of negative pressure, silt particle slurry and other foreign material of system outside can be drawn in the valve body by delivery port, make the terminal infiltrating irrigation mouth of system stop up easily, so that cause the carrier pipe large tracts of land to stop up, even whole water delivery transfusion system was lost efficacy, meanwhile, also cause the damage of infiltrating irrigation or drip irrigation equipment serious, shorten service life; The second, there are difference and landform just to come and go during owing to pressure of supply water, make the infiltrating irrigation water supply feed flow of water delivery transfusion system can not reach stable and uniform, thereby influence the optimum efficiency of automatic filtration irrigation.Just because of the problem of above-mentioned two aspects, so that this advanced irrigation technique of automatic filtration irrigation can not be widelyd popularize.

Summary of the invention

The terminal infiltrating irrigation mouth of the water delivery transfusion system that exists in the existing infiltration irrigation technology operation takes place to stop up easily and system's infiltrating irrigation water supply feed flow can not reach the stabilized uniform problem in order to solve, the purpose of this utility model is to provide a kind of can guarantee that unblocked and the not blocked and infiltrating irrigation water supply feed flow of the terminal infiltrating irrigation mouth of system can reach the stabilized uniform piston type needle valve for infiltration irrigation.

Solution of the present utility model is as follows.It has in a tubular form a valve body, the body cavity middle part is protruding with a circle valve interior wall annular boss, be provided with one at the body cavity center and be shaft-like needle, offer the vertical water outlet guide groove of a closed at both ends on the periphery of needle, the middle part of needle is extended with four chimbs of 90 ° of being separated by successively, these four chimbs put in respectively the valve interior wall annular boss in the vertical openings that connect of corresponding four of offering, make needle to slide up and down along these four openings, offer breach on the end face of these four chimbs and in breach, be embedded with an elastic sealing ring around the needle periphery jointly, tightly be equipped with the tapered collet of a lower bottom part in the outer bottom of valve body, collet upwards offers the vertical inlet opening that is connected with body cavity from the bottom surface, offer the horizontal water flowing guide groove that all is connected with this vertical inlet opening and body cavity on the inwall of collet, offer a vertical water flowing guide groove on the valve interior wall of four chimb belows of needle; The one lamination piston that tightly is nested with on needle is housed in the valve body below four chimbs of needle, the lamination piston is at least 4 piston ring by quantity and is clipped in that elastic seal ring between every adjacent two piston rings is superimposed successively to be constituted, wherein all leave the gap between the periphery of every piston ring and the valve interior wall, the periphery of each elastic seal ring and valve interior wall closely contact mutually, first piston ring in top is near the bottom surface of four chimbs of needle, second piston ring begins all down several piston rings all offer bending shape downwards from end face the curved groove of water flowing from the top, offer water flowing and bend the bend quantity and the bend total length of the curved groove of water flowing on adjacent a slice piston ring down of groove, increase to some extent than adjacent bend quantity and the bend total length of going up the curved groove of water flowing on a slice piston ring, the outer end that offers the curved groove of water flowing on the every piston ring of the curved groove of water flowing all is connected with body cavity, and inner all be connected with vertical water outlet guide groove on the needle, be equiped with the locking member that the lamination piston is locked vertically on the needle below the lamination piston; One compensating piston that slides on the needle is housed in the valve body above the valve interior wall annular boss, leave the gap between the perisporium of compensating piston and the valve interior wall, leave the gap between the end face of four chimbs of the bottom surface of compensating piston and needle, be embedded with in the cannelure of on the perisporium of compensating piston bottom, being offered one with valve interior wall mutually closely the contact elastic seal ring, have a top with compensating piston and valve body in the over top of compensating piston and valve body and wrap up and be fixed on elastic force film on the valve outer wall face, stretch out outside the perforate of elastic force center membrane at the top of needle, the outlet of the top of the vertical water outlet guide groove on the needle is near the below of elastic force film end face, and the top ends of needle is equipped with a top outlet with its vertical water outlet guide groove and is closed and forms the delivery port capping that removably connects with needle.

The utility model with said structure can be installed in any part of irrigation pipe when installing and using, the taper lower bottom part of its collet is pegged graft and is communicated with water delivery or woven hose.When needs give soil and crop infiltrating irrigation main flow medium when (comprising water, liquid manure solution, soil transformation neutralizer etc.), pipe network can inject the main flow medium from the vertical inlet opening of collet lower bottom part of the present utility model, and the main flow medium is entered in the body cavity of lamination piston base below via the horizontal water flowing guide groove on the collet inwall.If this moment pipe network water supply or normal pressure scope that liquid supply pressure is in setting in, under this pressure effect, leave the gap between the bottom surface owing to the end face of four chimbs of needle and compensating piston a free travel is provided, so can promoting lamination piston and needle, moves pressure towards the direction of elastic force film, the top of the vertical water outlet guide groove on the needle is pushed outside the end face of elastic force film (promptly being that delivery port is opened) to just stop motion when the end face of four chimbs at needle middle part withstands the compensating piston bottom surface.At this moment, the main flow medium flows in the body cavity of lamination piston top by the vertical water flowing guide groove on the valve body lower portion inwall, penetrate outside the elastic force film end face through the vertical water outlet guide groove on the needle again, the delivery port capping of needle top ends installing allows current (or liquid stream) become dispersion shape, reaches best infiltrating irrigation effect.

When the pressure of pipe network water supply or feed flow surpasses the normal pressure of setting, lamination piston and needle will head on the bottom surface of compensating piston, overcome the opposition (this moment, elastic deformation took place the elastic force film) of elastic force film, continue to move towards the direction of elastic force film.When the pressure that exceeds standard is in the less relatively order of magnitude, to surmount the top of the vertical water flowing guide groove on the valve body lower portion inwall and guide groove will be sealed from first elastic seal ring of last number formulary on the lamination piston, aforementioned main flow medium is directly flowed to the path blocking-up of lamination piston top, force the main flow medium must change its course from the lamination piston the curved groove of water flowing and go.But owing to offer bend quantity and the bend total length that the curved groove of water flowing on adjacent a slice piston ring down of groove is bent in water flowing, than adjacent increase to some extent of going up on a slice piston ring, make the curved groove of water flowing on adjacent down a slice piston ring go up the big of a slice piston ring than adjacent to the resistance of main flow medium, therefore the main flow medium will be mainly carries out penetrating outside the elastic force film end face through the vertical water outlet guide groove on the needle after the suitable decompression via the curved groove of the less water flowing of the resistance from second piston ring of last number formulary again.When the pressure that exceeds standard continues to increase and reach the relatively large order of magnitude, lamination piston and needle further overcome the reaction force that has taken place than the elastic force film of large deformation, direction towards the elastic force film moves, to surmount the top of the vertical water flowing guide groove on the valve body lower portion inwall and continue guide groove is sealed from second elastic seal ring of last number formulary on the lamination piston, force the main flow medium mainly via the curved groove of the water flowing from the 3rd piston ring of last number formulary, after having carried out suitable decompression, penetrate outside the elastic force film end face via the vertical water outlet guide groove on the needle again.Like this, when continuing to increase to the bigger relatively order of magnitude along with the pressure that exceeds standard, lamination piston and needle just are moved further bigger stroke, the main flow medium is just via the water outlet guide groove on the bigger following a slice piston ring of bend quantity and bend total length, after having carried out corresponding decompression, penetrate outside the elastic force film end face via the vertical water outlet guide groove on the needle again.This shows, along with exceeding standard and constantly increase of pipe network water delivery or infusion pressure, the main flow medium can carry out the pressure compensation accurately of varying number stage pressure via the curved groove of the water flowing of different piston rings on the lamination piston, make the pressure that penetrates the main flow medium outside the elastic force film end face keep the influence that changed by ductwork pressure, thus the even infiltrating irrigation of feasible system.

When the highest compensatory pressure that the water supply or the liquid supply pressure of pipe network exceeds setting, the last end face of lamination piston can be stopped by the bottom surface of valve interior wall annular boss, forces lamination piston and needle etc. to stop to move, and avoids them to be pushed out outside the body cavity.

When finishing irrigation operation or cut off the water liquid suddenly, will inevitably produce negative pressure in the system, this moment, body cavity of the present utility model was under the setting pressure, compensating piston wherein and lamination piston are driven by negative pressure, can move the while towards the inlet opening direction on the collet, the filling-valve intracoelomic cavity may produce the space of negative pressure, surplus water in the valve pocket or surplus liquid major part are pushed back system carry out the part compensation, surplus water of fraction or surplus liquid are under the reaction force compression, when the vertical water outlet guide groove port end sealing still of needle, penetrate outside the elastic force film end face.Meanwhile, because needle also moves towards the inlet opening direction of collet, so the top ports of the vertical water outlet guide groove on the needle is moved within the elastic force film end face, make the delivery port capping on needle top that the top ports of the vertical water outlet guide groove of needle is covered, guarantee to be in closed state outside subirrigation system and the system, thereby prevent that cement mortar and other foreign material are inhaled into body cavity.

The beneficial effects of the utility model are, its utilizes supplies water or liquid supply pressure operates voluntarily, can guarantee the irrigation needs under remote, large tracts of land, various landform and any adverse circumstances; It is as the infiltrating irrigation valve port of infiltrating irrigation system end, utilize irrigation operation to finish or cut off the water liquid suddenly for some reason and produce the self-closing function of negative pressure, accomplish to prevent effectively that terminal infiltrating irrigation mouth from stopping up, guarantee the unblocked of water delivery or liquid-transport pipe-line, simultaneously also avoid infiltrating irrigation equipment impaired, correspondingly prolonged service life; It is also by structural designs such as the curved grooves of the water flowing on the lamination piston, has solved that different and landform variation makes infiltrating irrigation water supply feed flow can not reach the stabilized uniform problem because of the water supply liquid supply pressure, has realized the even infiltrating irrigation of system, has reached the optimum efficiency of automatic filtration irrigation.Employing of the present utility model can promote that this advanced technology of automatic filtration irrigation is promoted widely.

Description of drawings

Fig. 1 is the forward cutaway view of a kind of concrete structure embodiment of the utility model;

Fig. 2 to Fig. 5 is respectively A-A, B-B, C-C and the D-D cutaway view of Fig. 1;

Fig. 6 is the E-E cutaway view of Fig. 2.

Embodiment

Referring to Fig. 1 to Fig. 6.The utlity model has in a tubular form a valve body 1, body cavity 101 middle parts are protruding with a circle valve interior wall annular boss 102, be provided with one at body cavity 101 centers and be shaft-like needle 2, offer the vertical water outlet guide groove 21 of a closed at both ends on the periphery of needle 2, the middle part of needle 2 is extended with four chimbs 22 of 90 ° of being separated by successively, these four chimbs 22 put in respectively in four vertical openings 1021 that connect that 102 correspondences of valve interior wall annular boss offer, make needle 2 to slide up and down along these four openings 1021, offer breach on the end face of these four chimbs 22 and in breach, be embedded with an elastic sealing ring 3 around needle 2 peripheries jointly, tightly be equipped with the tapered collet of a lower bottom part 4 in the outer bottom of valve body 1, collet 4 upwards offers the vertical inlet opening 41 that is connected with body cavity 101 from the bottom surface, offer the horizontal water flowing guide groove 42 that all is connected with this vertical inlet opening 41 and body cavity 101 on the inwall of collet 4, offer a vertical water flowing guide groove 103 on valve body 1 inwall of four chimb 22 belows of needle 2; The one lamination piston 12 that tightly is nested with on needle 2 is housed in the valve body 1 below four chimbs 22 of needle 2, lamination piston 12 is 4 piston ring 5 by quantity, 6,7,8 and be clipped in elastic seal ring 9 between every adjacent two piston rings, 10,11 superimposed successively formations, wherein all leave the gap between the periphery of every piston ring 5 to 8 and valve body 1 inwall, the periphery of each elastic seal ring 9 to 11 and the closely contact mutually of valve body 1 inwall, first piston ring 5 in top is near the bottom surface of four chimbs 22 of needle 2, second all down several piston rings 6 to 8 of piston ring 6 beginnings offer bending shape downwards respectively from end face curved groove 61 of water flowing from the top, 71,81, offer adjacent a slice piston ring 7 down of the curved groove of water flowing, groove 71 is bent in water flowing on 8,81 bend quantity and bend total length, respectively than the adjacent a slice piston ring 6 of going up, groove 61 is bent in water flowing on 7,71 bend quantity and bend total length increase to some extent, offer the every piston ring 6 of the curved groove of water flowing, 7, groove 61 is bent in 8 water flowing, 71,81 outer end all is connected with body cavity 101, and inner all be connected with vertical water outlet guide groove 21 on the needle 2, be equiped with the locking member that lamination piston 12 is locked vertically on the needle 2 of lamination piston 12 belows; Be equiped with a compensating piston 13 that slides on the needle 2 in the valve body 1 above valve interior wall annular boss 102, leave the gap between the perisporium of compensating piston 13 and valve body 1 inwall, gapped between the end face of four chimbs 22 of the bottom surface of compensating piston 13 and needle 2, be embedded with an elastic seal ring 14 that closely contacts with valve body 1 inwall in the cannelure of on compensating piston 13 bottom perisporiums, being offered, have a top with compensating piston 13 and valve body 1 in the over top of compensating piston 13 and valve body 1 and wrap up and be fixed on elastic force film 15 on valve body 1 outside wall surface, stretch out outside the perforate at elastic force film 15 centers at the top of needle 2, the outlet of the top of the vertical water outlet guide groove 21 on the needle 2 is near the below of elastic force film 15 end faces, and the top ends of needle 2 is equipped with one and the top outlet capping of its vertical water outlet guide groove 21 got up and forms the delivery port capping 16 that removably connects with needle 2.

Referring to Fig. 1 and Fig. 6.The locking member that lamination piston 12 lock vertically of installing on the needle 2 of described lamination piston 12 belows, embodiment adopts locking nut 17 to be screwed on the threaded portion of needle 2 processing and pad is locked lamination piston 12 with pad 18 and spring washer 19 among the figure; Certainly, also can adopt snap ring or latch to be connected on the needle 2 as locking member locks.Form between described delivery port capping 16 and the needle 2 and removably connect, embodiment is screwed on the threaded portion of needle 2 tops processing after screw is offered in delivery port capping 16 among the figure; Certainly also can adopt other mode that removably connects, as will be enclosed within after delivery port capping 16 perforates on the step surface of needle 2 top ends processing, installing snap ring or latch on needle 2 then also can form and removably connect.

Elastic sealing ring 3 of the present utility model, elastic seal ring 9 to 11, elastic seal ring 14 and elastic force film 15 all can adopt the elastomeric material of good springiness to make.

Claims

1, a kind of piston type needle valve for infiltration irrigation has in a tubular form a valve body, it is characterized in that:

(A) the body cavity middle part is protruding with a circle valve interior wall annular boss, be provided with one at the body cavity center and be shaft-like needle, offer the vertical water outlet guide groove of a closed at both ends on the periphery of needle, the middle part of needle is extended with four chimbs of 90 ° of being separated by successively, these four chimbs put in respectively the valve interior wall annular boss in the vertical openings that connect of corresponding four of offering, make needle to slide up and down along these four openings, offer breach on the end face of these four chimbs and in breach, be embedded with an elastic sealing ring around the needle periphery jointly, tightly be equipped with the tapered collet of a lower bottom part in the outer bottom of valve body, collet upwards offers the vertical inlet opening that is connected with body cavity from the bottom surface, offer the horizontal water flowing guide groove that all is connected with this vertical inlet opening and body cavity on the inwall of collet, offer a vertical water flowing guide groove on the valve interior wall of four chimb belows of needle;

(B) in the valve body below four chimbs of needle a lamination piston that tightly is nested with on needle is housed, the lamination piston is at least 4 piston ring by quantity and is clipped in that elastic seal ring between every adjacent two piston rings is superimposed successively to be constituted, wherein all leave the gap between the periphery of every piston ring and the valve interior wall, the periphery of each elastic seal ring and valve interior wall closely contact mutually, first piston ring in top is near the bottom surface of four chimbs of needle, second piston ring begins all down several piston rings all offer bending shape downwards from end face the curved groove of water flowing from the top, offer water flowing and bend the bend quantity and the bend total length of the curved groove of water flowing on adjacent a slice piston ring down of groove, increase to some extent than adjacent bend quantity and the bend total length of going up the curved groove of water flowing on a slice piston ring, the outer end that offers the curved groove of water flowing on the every piston ring of the curved groove of water flowing all is connected with body cavity, and inner all be connected with vertical water outlet guide groove on the needle, be equiped with the locking member that the lamination piston is locked vertically on the needle below the lamination piston;

(C) compensating piston that slides on the needle is housed in the valve body above the valve interior wall annular boss, leave the gap between the perisporium of compensating piston and the valve interior wall, leave the gap between the end face of four chimbs of the bottom surface of compensating piston and needle, be embedded with in the cannelure of on the perisporium of compensating piston bottom, being offered one with valve interior wall mutually closely the contact elastic seal ring, have a top with compensating piston and valve body in the over top of compensating piston and valve body and wrap up and be fixed on elastic force film on the valve outer wall face, stretch out outside the perforate of elastic force center membrane at the top of needle, the outlet of the top of the vertical water outlet guide groove on the needle is near the below of elastic force film end face, and the top ends of needle is equipped with a top outlet with its vertical water outlet guide groove and is closed and forms the delivery port capping that removably connects with needle.

2, piston type needle valve for infiltration irrigation according to claim 1, it is characterized in that, the locking member of installing on the needle of lamination piston below that the lamination piston is locked vertically is to adopt locking nut to be screwed on the threaded portion of needle processing and pad is locked the lamination piston with pad and spring washer.

3, piston type needle valve for infiltration irrigation according to claim 1 and 2 is characterized in that, forms between delivery port capping and the needle to removably connect, and is to be screwed on the threaded portion of needle top processing after screw is offered in the delivery port capping.