The emulsion pump
Technical field
The utility model relates to daily use chemicals and the employed emulsion pump of medicine and other fields.
Background technology
The emulsion pump has been widely used in industries such as daily use chemicals and medicine.In traditional emulsion pump, facing and cylinder cover separate.Be further cost-cutting, and make manufacturing and easier for installation, the application's utility model people has submitted the application that is entitled as " Multifunction Emulsion Pump " on March 29th, 1999, and authorized, and the patent No. is ZL99207292.1.In this Multifunction Emulsion Pump, facing and cylinder cover are integrated, thus injection-moulded plastic part is reduced to four, thus greatly reduce cost, and reduced the cooperation requirement between each part to greatest extent.
Yet, in above-mentioned Multifunction Emulsion Pump, still exist some following problems to need to solve.
At first, implement the orientating function difficulty.In the emulsion pump that traditional facing and cylinder cover separate, when facing was not tightened, facing and cylinder cover can rotate arbitrarily each other.Therefore, when in factory's can, before facing is tightened, can be with spray nozzle towards desirable angle, after waiting to tighten facing, the nozzle direction also is fixed on desirable direction.But in above-mentioned Multifunction Emulsion Pump, because cylinder cover and facing unite two into one, so can not come tuning with above-mentioned way.Therefore, for same emulsion pump,, can cause the direction of nozzle also different if be used for the different container bottle of bottleneck height; For same container bottle,, then also can cause the direction difference of nozzle if adopt different emulsion pumps.In addition, two groups of threads of security and cylinder cover must be consistent at the height (may be the retaining convex rib of security screw thread lower surface or security below) at stop bit place, brings very big difficulty so just for the control of mould and processing procedure.Even can accomplish above-mentioned precision, yet need to increase accuracy requirement to the container bottle bottleneck, guarantee bottleneck height unanimity.
Secondly, Spring capable of diameter varying is difficult to guarantee down the sealing property of pearl.Above-mentioned Multifunction Emulsion Pump to the sealing of nozzle, is pushed down down the check valve pearl and is realized by Spring capable of diameter varying when tapered end.The height at this degree for the Spring capable of diameter varying pressurized, right alignment, place, the thin footpath of Spring capable of diameter varying and the height of diameter and pearl holder all have higher requirement.If these requirements of out of reach just are difficult to realize the failure-free sealing.
Have, more screw thread fit and Spring capable of diameter varying have increased cost again.The security of above-mentioned multi-functional emulsion has one group of thread, and facing has three groups of threads.The molding cycle of this type of thread part is longer, the mould complexity, and also the assembling of two groups of threads is also slow, is unfavorable for high efficiency production in enormous quantities.In addition, the materials of Spring capable of diameter varying are also many, and fabrication cycle is also longer, so caused cost higher.
At last, the complex structure of last one-way valve seat.Above-mentioned Multifunction Emulsion Pump is that the valve seat with last check valve is arranged in the piston rod, forms the structure of a herringbone.This valve seat construction makes Mould design become complicated, make whole molding process complicated, and the resistance that emulsion is passed through is bigger.
The utility model content
For overcoming above-mentioned defective, the purpose of this utility model provides a kind of emulsion pump, its when simple in structure, number of parts is few, cost-cutting and further improve the sealed against leakage performance further.
For achieving the above object, the utility model provides a kind of emulsion pump, comprising: a security; One with security bonded assembly piston rod, be provided with check valve in it; One with the bottleneck toothed sleeve meshed; One cylinder, its upper end is connected in facing, and its lower end is provided with down check valve; And a spring, its lower end abutment is in the bottom of cylinder, and its upper end then is resisted against the head of piston rod; It is characterized in that the upper part diameter of piston rod is greater than the diameter of its underpart, thereby on protruding rank of formation, reducing position, these protruding rank constitute the valve seat of going up check valve.
Preferably, be provided with an inner ring in facing, this inner ring is provided with one of them of at least one guide groove or at least one orienting lug, be provided with in the bottom of connecting duct at least one guide groove or at least one orienting lug wherein another,
Preferably, be provided with at the upper surface of the lower surface of inner ring and orienting lug and make their intermeshing geared assemblies.
Preferably, a side of guide groove below is made circular-arc, is provided with the slewing area of a projection with the restricted guidance piece at opposite side.
Preferably, one of being provided with in a seal ring and the sealing plug in the bottom of cylinder and the lower part of piston, the bottom of cylinder and in the lower part of piston another are provided with another in seal ring and the sealing plug, and sealed picture and sealing plug are meshing with each other and realize sealing.
Preferably, interconnect by convex tendon and groove between facing and the cylinder.
Preferably, the position in that the top of facing cooperates with piston rod extends upward a water proof ring, and this water proof ring is when tapered end and the top seal of piston rod.
Preferably, this interior pipe inserts piston rod and combines with it.
Preferably, the endoporus of interior pipe is a non-circular hole.
Preferably, piston rod is divided into two parts.
Emulsion pump of the present utility model can be realized with extremely low becoming originally, and when increaseing productivity significantly, obtain good sealed against leakage performance with very simple structure, minimum member.
By description, can more be expressly understood other purpose of the present utility model, feature and advantage below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is that wherein security is depressed and is in the tapered end state according to the cutaway view of the emulsion pump of the utility model preferred embodiment;
Fig. 2 also is the cutaway view of above-mentioned emulsion pump, and wherein security is in non-tapered end state by spring reset;
Fig. 3 is the view sub-anatomy of above-mentioned emulsion pump;
Fig. 4 a, 4b and 4c are respectively upward view, cutaway view and the front views of security;
Fig. 5 a, 5b are respectively the upward view and the cutaway views of facing, and Fig. 5 c is the view that launches along the φ A among Fig. 5 b;
Fig. 6 is the front elevation of retracing spring;
Fig. 7 a, 7b, 7c and 7d are respectively cutaway view, birds-eye view, upward view and the front elevations of cylinder;
Fig. 8 a, 8b and 8c are respectively cutaway view, front elevation and the birds-eye vieies of piston rod;
The specific embodiment
See also each accompanying drawing, what this emulsion pump was total is represented by label 1.Shown in Fig. 1~3, this emulsion pump 1 mainly comprises security 2, facing 3, piston rod 4, cylinder 6, retracing spring 8, goes up pearl 9, following pearl 10 and suction pipe 11.
The basic functional principle of this emulsion pump is similar to prior art.Wherein go up pearl 9 and form upward check valve with the valve seat 42 on the piston rod 4, following pearl 10 is formed check valve down with the valve seat 61 on the cylinder 6.When security 2 presses down, last one-way valve opens, following closed check valve, the emulsion in the pump chamber is pumped out.When security 2 upward movements, last closed check valve, following one-way valve opens sucks emulsion in the bottle in the pump chamber by suction pipe 11.
Fig. 1 shows security 2 and is depressed and is in the tapered end state.So-called " tapered end " state is meant that security 2 is locked, can not take out the state of emulsion by pump, is easy to transportation and storage under this state.Fig. 2 shows security 2 and is resetted by spring 8 and be in non-tapered end state, can be used to pump at this state lactogenesis liquid pump and takes out emulsion.
As illustrated in fig. 1 and 2, security 2 is connected in piston rod 4.In conjunction with shown in Fig. 4 a~4c, security 2 does not have complicated helicitic texture again, and it is dashed forward downwards and has established interior pipe 21, and this interior pipe 21 inserts piston rod 4 and combines with it.Can on interior pipe 21 or piston rod 4, convex tendon be set, to strengthen combination between the two.In addition, in the endoporus of interior pipe 21, can adopt non-circular hole design,, can allow emulsion pass through again, can not stop up fluid passage so when last pearl 9 is pushed into top dead point by liquid, both can prevent that pearl 9 was offside.
As illustrated in fig. 1 and 2, facing 3 is connected with cylinder 6.In this embodiment, adopt the connection structure of convex tendon and groove between facing 3 and the cylinder 6, convex tendon can be arranged on the piston rod 4, groove is arranged on the facing 3, vice versa.Under convex tendon-groove bonded assembly situation, can make that facing 3 and cylinder 6 are chimeric easily to be connected, compare with higher being threaded of accuracy requirement, its make and fitting process simpler.In addition, cylinder 6 outsides suitable for reading and facing corresponding position in conjunction with after form air drain longitudinally, cylinder inboard suitable for reading with also form air drain longitudinally after the facing corresponding position combines, and cylinder end face suitable for reading combines the gapped or breach in back with the cooresponding lower plane of facing.Air drain on these three faces is interconnected, so need not to be provided with the function that the balance pore also can be realized anti-feed liquor on cylinder.
As Fig. 1,2 and 5b shown in, the position in that the top of facing 3 cooperates with piston rod 4 slightly extends upward a water proof ring 31, enters in the pump and in the bottle to prevent shower water etc.When tapered end, the top seal of this water proof ring 31 and piston rod 4, at the security top dead center position of tapered end not, the inside face of water proof ring 31 also plays certain sealing function with cooperating of piston rod outside face, shower water is difficult for entering in the pump and bottle in.
As Fig. 1,2 and 8a~8c shown in, in this embodiment, the upper part diameter of piston rod 4 is greater than the diameter of its underpart, thereby forms protruding rank in the reducing position, these protruding rank promptly constitute the valve seat 42 of going up check valve.The herringbone valve seat that this valve seat is different from the past, this valve seat that forms by the piston rod reducing is all fairly simple on mold design and molding process.Particularly, owing to can loose core, therefore help being provided with sealing plug (will be described in more detail below) in the lower end of piston rod from the top.This valve seat construction of this embodiment is a very important feature of the present utility model.In addition, a breach is arranged on piston rod 4, it plays the function that makes both anti-rotations corresponding to the position of the nozzle of security 2.
As Fig. 1,2 and 8a shown in, in this embodiment, extend a sealing plug 43 from the bottom of piston rod 4, extend upward a seal ring 65 from the following hole of bead of cylinder 6 bottoms.During tapered end, the sealing plug 43 of piston rod 4 is meshing with each other with the seal ring 65 of cylinder 6 and finishes sealing, thereby guarantees that nozzle can not leak.Between piston rod 4 and its sealing plug 43, be formed with at least one through hole, use the formation milk channel.The position of the seal ring of the sealing plug of piston rod 4 and cylinder 6 can exchange, and can reach identical purpose.In addition, can be in the arranged outside seal bead of sealing plug 43, with the enhanced leaktightness effect.
Shown in Fig. 1,2,5a~5c and 8a~8c, in piston rod 4 arranged outside orienting lug 41 is arranged, the quantity of orienting lug can be one, two or more, and preferably with one heart, etc. the setting of central angle ground.Guide groove 321 can match with the orienting lug 41 on the piston rod 4.When orienting lug 41 in guide groove 321 during up-and-down movement, emulsion pump in running order (Fig. 2).After security 2 is depressed into bottom dead point and clickwise, promptly be in tapered end state (Fig. 1).In this embodiment, what guide groove 321 adopted is form of grooves, and so-called " groove " is to connect to puncture whole wall thickness in other words conj.or perhaps and form, when tapered end, the upper surface of orienting lug 41 can be below the horizontal component that forms by wall thickness stop bit.Adopt the whole wall thickness of this perforation " groove " structure, can conservation, and because the area of contact of orienting lug and wall thickness is bigger, so can increase joggled strength.
In addition, also guide groove 321 can be arranged to the breach form, so-called " breach " is meant and need not to connect whole wall thickness, as long as from the recessed part of wall thickness.In the case, when tapered end, the upper surface of orienting lug 41 can cooperate and stop bit with the part of inner ring 32 lower surfaces 322.
Shown in Fig. 5 c, a side of guide groove 321 belows is made circular-arc, so that orienting lug 41 skids off breach.In addition, be provided with a small embossment 323, slide back breach to prevent orienting lug 41 in this circular-arc part.The opposite side of guide groove 321 belows is provided with a projection 324, with the rotation of restricted guidance piece 41, thereby theoretic tapered end angle can be reached between 0 °~180 °.Preferably, be provided with at the upper surface of the lower surface 322 of inner ring 32 and orienting lug 41 and make their intermeshing geared assemblies, two groups of wire raised lines for example, preferably in correspondence with each other, central angle raised line that equate, radial, concentric.After security 2 was adjusted to desirable direction, geared assembly (two groups of raised lines) can make security remain on difficult moving on this direction.Described geared assembly can also adopt other various forms, and the engaging structure of knife edge type for example is set at the upper surface of orienting lug 41.
As illustrated in fig. 1 and 2, spring 8 can adopt spring common, non-reducing, and its lower end abutment is in the bottom of cylinder 6, and its upper end then is resisted against the head of piston rod 4.In addition, be provided with the formation valve seat 63 and the following pearl 10 of check valve down in the cylinder 6 bottom endoporus.Suction pipe 11 is arranged on the bottom of cylinder 6, and is communicated in bottle body bottom.
Though abovely the utility model is described in detail in conjunction with preferred embodiment, should be appreciated that, be familiar with those of ordinary skill in the art and should on the basis of above disclosure, make various modification that are equal to and change.For example, the position of lock head structure can exchange, that is, orienting lug can be arranged on the connecting duct, and guide groove is arranged on the facing, also orienting lug can be arranged on the facing, and guide groove is arranged on the piston rod; Piston rod and piston can be separated into two parts (at this moment, piston rod being referred to as connecting duct), this can bring convenience on technology; Convex tendon/groove connection structure can be replaced with being threaded, or the like.Therefore, protection domain of the present utility model should be limited by appended claims.