CN209278590U - A kind of one-way joint - Google Patents

Abstract

The utility model belongs to the joint technique field for the control fluid flow direction that detecting instrument uses, in particular a kind of one-way joint, including PVDF valve body, the bottom end and top of the PVDF valve body offer fluid inlet and fluid outlet respectively, cavity is offered on the PVDF valve body, the cavity is connected with fluid inlet and fluid outlet respectively, nonreturn valve core is fixedly installed in the cavity, the top and bottom end of the PVDF valve body are fixedly installed with fixed block, the side that two fixed blocks are located remotely from each other opens up fluted, screw thread is offered on the inner wall of the groove, first through hole is offered on two grooves side inner wall close to each other, two first through hole are connected with corresponding fluid inlet and fluid outlet respectively.The utility model of simple structure and strong practicability reduces the use of hose, and installation is simple and fast, it is possible to prevente effectively from leakage, protects detecting instrument.

Description

A kind of one-way joint

Technical field

The joint technique field flowed to the utility model relates to the control fluid that detecting instrument uses more particularly to a kind of list To connector.

Background technique

In testing equipment field, need to be used in water sampling pipeline and chemical reagent pipeline to one-way joint, with Prevent water sample or chemical reagent adverse current.

But in the prior art, the one-way joint in detection device is connected using hose, when pipeline blocks, Loine pressure is excessive, or when the rear pipeline aging of use for a long time, interface is easy leakage, damages detecting instrument, for this purpose, proposing one Kind one-way joint.

Utility model content

Purpose of the utility model is to solve disadvantages existing in the prior art, and a kind of one-way joint proposed.

To achieve the goals above, the utility model adopts the technical scheme that a kind of one-way joint, including PVDF valve Body, the bottom end and top of the PVDF valve body offer fluid inlet and fluid outlet respectively, offer on the PVDF valve body Cavity, the cavity are connected with fluid inlet and fluid outlet respectively, and nonreturn valve core is fixedly installed in the cavity, described The top and bottom end of PVDF valve body are fixedly installed with fixed block, the side that two fixed blocks are located remotely from each other open up it is fluted, Screw thread is offered on the inner wall of the groove, offers first through hole on two grooves side inner wall close to each other, two First through hole is connected with corresponding fluid inlet and fluid outlet respectively.

Preferably, be fixedly installed with sealing ring on two grooves side inner wall close to each other, the sealing ring with it is right The first through hole answered is adapted.

Preferably, the second through-hole is offered in the top inner wall of the fluid inlet, second through-hole is connected with cavity It is logical.

Preferably, third through-hole is offered in the bottom interior wall of the fluid outlet, the third through-hole is connected with cavity It is logical.

Preferably, the PVDF valve body is made of Kynoar material.

Preferably, the nonreturn valve core is made of fluorubber material.

Compared with prior art, the utility model has the beneficial effects that firstly, the device is entered by PVDF valve body, fluid Mouth, fluid outlet, cavity, nonreturn valve core, groove and screw thread match, in use, when fluid enters PVDF valve from fluid inlet When in the cavity on body, nonreturn valve core is acted on by Fluid pressure, and intermediate slit automatically opens, after fluid passes through fluid outlet, Nonreturn valve core appliance for releasing single in the case where no inlet pressure closes, and by groove and screw thread, can make its of PVDF valve body and pipeline Its valve body is tightly connected by the direction of fluid flowing；

The utility model of simple structure and strong practicability reduces the use of hose, and installation is simple and fast, can effectively keep away Exempt from leakage, protects detecting instrument.

Detailed description of the invention

Fig. 1 faces schematic cross-sectional view for the utility model；

Fig. 2 is the overlooking structure diagram of the utility model.

In figure: 1, PVDF valve body；2, fluid inlet；3, fluid outlet；4, cavity；5, nonreturn valve core；6, fixed block；7, recessed Slot；8, screw thread；9, first through hole.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1-2 is please referred to, the utility model provides a kind of technical solution: a kind of one-way joint, including PVDF valve body 1, The bottom end and top of PVDF valve body 1 offer fluid inlet 2 and fluid outlet 3 respectively, and cavity 4, chamber are offered on PVDF valve body 1 Body 4 is connected with fluid inlet 2 and fluid outlet 3 respectively, and nonreturn valve core 5, the top of PVDF valve body 1 are fixedly installed in cavity 4 End and bottom end are fixedly installed with fixed block 6, and the side that two fixed blocks 6 are located remotely from each other opens up fluted 7, groove 7 it is interior Screw thread 8 is offered on wall, and first through hole 9, two first through hole 9 are offered on two grooves 7 side inner wall close to each other It is connected respectively with corresponding fluid inlet 2 and fluid outlet 3；

Sealing ring is fixedly installed on two grooves 7 side inner wall close to each other, sealing ring is logical with corresponding first Hole 9 is adapted, and liquid-leakage preventing effect is good, and the second through-hole, the second through-hole and 4 phase of cavity are offered in the top inner wall of fluid inlet 2 It is connected to, offers third through-hole in the bottom interior wall of fluid outlet 3, third through-hole is connected with cavity 4, and PVDF valve body 1 is poly- Vinylidene material is made, and has resistant to chemical etching, the feature of high temperature resistant and high intensity, and nonreturn valve core 5 is fluorubber material system At having that stability is strong, the characteristics of high temperature resistant is resistant to chemical etching, and elasticity is strong, good airproof performance, which passes through PVDF valve body 1, stream Body entrance 2, fluid outlet 3, cavity 4, nonreturn valve core 5, groove 7 and screw thread 8 match, in use, working as fluid from fluid inlet 2 When in into the cavity 4 on PVDF valve body 1, nonreturn valve core 5 is acted on by Fluid pressure, and intermediate slit automatically opens, and fluid is logical After crossing fluid outlet 3, appliance for releasing single in the case where no inlet pressure of nonreturn valve core 5 is closed, and by groove 7 and screw thread 8, can be made Other valve bodies of PVDF valve body 1 and pipeline are tightly connected by the direction of fluid flowing, and the utility model structure is simple, practicability By force, reduce the use of hose, installation is simple and fast, it is possible to prevente effectively from leakage, protects detecting instrument.

Working principle: in the utility model, screw thread 8 is 1/4-28UNF standard thread, can be directly connected to other valve bodies, Reducing the use of hose, installation is simple and fast, it is possible to prevente effectively from leakage, in use, when fluid enters from fluid inlet 2 When in the cavity 4 on PVDF valve body 1, nonreturn valve core 5 is acted on by Fluid pressure, and intermediate slit automatically opens, and fluid passes through stream Behind body outlet 3, appliance for releasing single in the case where no inlet pressure of nonreturn valve core 5 is closed, and by groove 7 and screw thread 8, can make PVDF valve Other valve bodies of body 1 and pipeline are tightly connected by the direction of fluid flowing.

The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model Within enclosing.

Claims (6)

1. a kind of one-way joint, including PVDF valve body (1), it is characterised in that: the bottom end of the PVDF valve body (1) and top difference Fluid inlet (2) and fluid outlet (3) are offered, is offered cavity (4) on the PVDF valve body (1), the cavity (4) is respectively It is connected with fluid inlet (2) and fluid outlet (3), is fixedly installed with nonreturn valve core (5), the PVDF in the cavity (4) The top and bottom end of valve body (1) are fixedly installed with fixed block (6), and the side that two fixed blocks (6) are located remotely from each other offers Groove (7) is offered screw thread (8) on the inner wall of the groove (7), is opened on two grooves (7) side inner wall close to each other Equipped with first through hole (9), two first through hole (9) are connected with corresponding fluid inlet (2) and fluid outlet (3) respectively.

2. a kind of one-way joint according to claim 1, it is characterised in that: in two grooves (7) side close to each other Sealing ring is fixedly installed on wall, the sealing ring is adapted with corresponding first through hole (9).

3. a kind of one-way joint according to claim 1, it is characterised in that: in the top inner wall of the fluid inlet (2) The second through-hole is offered, second through-hole is connected with cavity (4).

4. a kind of one-way joint according to claim 1, it is characterised in that: in the bottom interior wall of the fluid outlet (3) Third through-hole is offered, the third through-hole is connected with cavity (4).

5. a kind of one-way joint according to claim 1, it is characterised in that: the PVDF valve body (1) is Kynoar Material is made.

6. a kind of one-way joint according to claim 1, it is characterised in that: the nonreturn valve core (5) is fluorubber material It is made.