CN210266025U - Check valve for direct drinking water - Google Patents

Abstract

The utility model discloses a check valve for direct drinking water, its structure includes the valve body, the valve gap that leads to, the non return spring, valve clack frame and valve clack etc. mainly be with valve clack frame design for by the main part that is located the middle part, be located anterior valve clack installation head and be located the integrated into one piece part that the spring installation head at rear portion constitutes jointly, still be equipped with the guide claw of a plurality of circumference equipartitions simultaneously on the outer periphery of main part, the outer fringe line of every guide claw all slides the laminating on the inner wall of main part, thereby form the axial displacement direction of valve clack frame in the valve body. Because the valve flap frame adopts an integrated structure, the internal structure of the check valve is greatly simplified, and the valve flap frame can simultaneously undertake three functions of valve flap fixing, check spring fixing and guiding, so that the check valve has the advantages of small opening pressure, good sealing performance, high use reliability and the like; in addition, all accessories of the check valve are made of environment-friendly materials, and the check valve also meets the food-grade safety standard required by a direct drinking water pipeline.

Description

Check valve for direct drinking water

Technical Field

The utility model relates to a check valve in the pipeline valve gate specifically indicates a check valve for direct drinking water.

Background

The check valve belongs to the automatic valve class, also known as check valve, backflow valve or isolating valve, etc., and has very wide application in pipeline system, and is commonly used for the bottom valve of a water pumping device, and can prevent the backflow of water. At present, the defects of the common check valve are that the resistance is large, the sealing performance is poor when the check valve is closed, the reason is that the design of a valve clack frame of the check valve is too complex, the realization of the check function is mainly realized by that the valve clack frame pushed by a check spring drives a valve clack to axially move, in the action process of the valve clack frame, three functions of valve clack fixing, check spring fixing and guiding are necessarily required to be involved, the traditional design thought is that the three functions are respectively born by adding other components, the complexity of the structural design is obviously caused, and the use reliability is poor.

Disclosure of Invention

The utility model aims to solve the technical problem that overcome prior art's defect and provide a structural design is simple, opening pressure is little, sealing performance is good, use the high check valve for direct drinking water of reliability, and this check valve also accords with the food level safety standard that direct drinking water pipeline needs simultaneously.

The technical problem of the utility model is realized through following technical scheme:

the utility model provides a check valve for direct drinking water, includes valve body, sealing installation intake valve lid and install valve clack frame, non return spring and the valve clack in the valve body of valve body intake end, this valve clack is installed at valve clack frame front portion, and this non return spring pushes away valve clack frame rear portion, and then drives the valve clack and seals intake valve lid and form the non return structure, valve clack frame constitute by integrated into one piece and the main part that is located the middle part, the valve clack installation head that is located the front portion and the spring installation head that is located the rear portion, be equipped with the direction claw of a plurality of circumference equipartitions on the outer periphery of this main part, the outer fringe line of every direction claw all slides the laminating on.

The front end of each guide claw is integrally fixed on the outer circumferential surface of the main body, the rear end of each guide claw extends backwards and is suspended, the spring mounting head is enclosed by the rear ends of the guide claws, and the outer edge line of each guide claw is a straight line.

The outer surface of the main body is an arc surface, the radian of the front end of the arc surface is maximum, and the arc degree is gradually reduced from front to back.

The valve clack mounting head is conical, and the spring mounting head is mushroom-shaped.

The valve clack mounting head root be equipped with round front ring groove, the valve clack inlay to adorn to be fixed in the front ring groove.

The spring mounting head root be equipped with round back annular, non return spring tip inlay dress fix in the back annular.

The check spring is a conical spring with a small front end and a large rear end, the conical spring is sleeved outside the spring mounting head in a directional mode, and the small front end is embedded and fixed in the rear annular groove.

The inner wall of the valve body is provided with a circle of inner shoulder, the inner shoulder is provided with a positioning ring groove, and the larger rear end of the check spring is positioned and installed in the positioning ring groove.

The inner wall of the water inlet valve cover is provided with a step-shaped annular sealing surface, and the valve clack seals and seals the annular sealing surface.

The valve clack frame adopt PPSU environment-friendly engineering plastics material, valve body and intake valve cover all adopt HPb59-1 environmental protection brass material, check spring adopts 304 food level stainless steel material, the valve clack adopts silicon rubber material.

Compared with the prior art, the utility model discloses mainly be with the valve clack frame design for by the main part that is located the middle part, be located anterior valve clack installation head and the integrated into one piece part that the spring installation head that is located the rear portion constitutes jointly, still be equipped with the guide claw of a plurality of circumference equipartitions simultaneously on the outer periphery of main part, the equal sliding fit of outer fringe line of every guide claw is on the inner wall of main part to form the axial displacement direction of valve clack frame in the valve body. Due to the adoption of the valve clack frame with the integrated structure, the internal structure of the check valve is greatly simplified, namely the structural design is simpler, and the valve clack frame can simultaneously bear three functions of valve clack fixing, check spring fixing and guiding, so that the check valve has the advantages of small opening pressure, good sealing performance, high use reliability and the like; in addition, all accessories of the check valve are made of environment-friendly materials, and the check valve also meets the food-grade safety standard required by a direct drinking water pipeline.

Drawings

Fig. 1 is a schematic sectional view of the present invention.

Fig. 2 is a schematic structural view of the valve flap holder.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in fig. 1 and fig. 2, 1 is a valve body, 11 is a positioning ring groove, 2 is a water inlet valve cover, 21 is an annular sealing surface, 3 is a valve flap frame, 31 is a main body, 311 is an arc surface, 32 is a valve flap mounting head, 321 is a front ring groove, 33 is a spring mounting head, 331 is a rear ring groove, 34 is a guide claw, 341 is an outer edge line, 4 is a valve flap and 5 is a check spring.

The utility model provides a check valve for direct drinking water, as shown in figure 1, it is related to one kind and installs in direct drinking water pipeline and be used for preventing the pipeline valve of drinking water backward flow, its structure is mainly by valve body 1, intake valve lid 2, check spring 5, valve clack frame 3 and valve clack 4 etc. constitute, and valve clack frame 3 adopts PPSU environment-friendly engineering plastics material, valve body 1 and intake valve lid 2 all adopt HPb59-1 environmental protection brass material, check spring 5 adopts 304 food level stainless steel material, valve clack 4 adopts the silicon rubber material, because all accessories of check valve all adopt environmental protection material to make, the event can more accord with the food level safety standard that direct drinking water pipeline needs.

The valve body 1 be hollow tubular part, the valve gap 2 that intakes is the annular part of cavity, so can circulate the drinking water smoothly in valve body 1 and the valve gap 2 that intakes, the view left side that this embodiment uses shown in figure 1 is anterior, the view right side is the rear portion, the valve gap 2 that intakes screw tight seal installation in the front end of valve body 1, this valve body front end is the end of intaking of whole check valve again simultaneously.

The check spring 5, the valve flap frame 3 and the valve flap 4 are all installed in the valve body 1, the valve flap frame 3 is designed to be streamline as shown in fig. 2, and is composed of a main body 31 which is integrally formed and located in the middle, a valve flap mounting head 32 located in the front and a spring mounting head 33 located in the rear, a plurality of guide claws 34 which are uniformly distributed circumferentially are arranged on the outer circumferential surface of the main body 31, and the guide claws 34 which are uniformly distributed circumferentially are totally arranged in the embodiment.

The outer surface of the main body 31 is an arc surface 311, the front end of the arc surface has the largest radian, and the radian is gradually reduced from front to back; the valve flap mounting head 32 is tapered, a circle of front ring groove 321 is arranged at the root of the valve flap mounting head 32, namely between the valve flap mounting head 32 and the main body 31, and the valve flap 4 is embedded and fixed in the front ring groove 321, so that the valve flap 4 is fixedly mounted at the front part of the valve flap frame 3.

The spring mounting head 33 is mushroom-shaped, a circle of rear ring groove 331 is arranged at the root of the spring mounting head 33, namely between the spring mounting head 33 and the main body 31, and the end part of the check spring 5 is embedded and fixed in the rear ring groove 331, and the specific structure is as follows: the check spring 5 is a conical spring with a small front end and a large rear end, the conical spring is directionally sleeved outside the spring mounting head 33, and the smaller front end is embedded and fixed in the rear annular groove 331, so that the check spring 5 elastically pushes the valve flap frame 3 in a normal state, namely, the check spring 5 is always in a compressed state, and the thrust of the check spring 5 needs to be greater than the total gravity of the valve flap frame 3 and the valve flap 4.

The inner wall of the valve body 1 is provided with a circle of inner shoulder, the inner shoulder is provided with a positioning ring groove 11, and the inner shoulder is used for positioning and mounting the larger rear end of the check spring 5.

After the valve flap frame 3, the valve flap 4 and the check spring 5 are installed in place, the check spring 5 pushes the back of the valve flap frame 3, so that the valve flap 4 can be driven to seal and close the water inlet valve cover 2 to form a check structure, and the outer edge line 341 of each guide claw 34 is in linear sliding fit with the inner wall of the main body 31 to form axial movement guide.

Moreover, each guide claw 34 has a specific structure: the front end of each guide claw 34 is integrally fixed on the outer circumferential surface of the main body 31, the rear end of each guide claw 34 extends backwards and is suspended, and the rear ends of the three guide claws 34 just enclose the spring mounting head 33.

In addition, the inner wall of the water inlet valve cover 2 is also provided with a step-shaped annular sealing surface 21, so that the annular sealing surface 21 can be sealed and closed after the valve clack 4 is pushed by elasticity, namely, the sealing and non-return between the valve clack 4 and the water inlet valve cover 2 are realized.

The utility model adopts the valve clack frame 3 with an integrated structure, which not only greatly simplifies the internal structure of the check valve, i.e. the structural design is simpler, but also the valve clack frame 3 can simultaneously undertake three functions of valve clack fixation, check spring fixation and guidance, the guidance function means that three guide claws 34 on the outer periphery of the valve clack frame 3 can be in sliding fit with the inner wall of the valve body 1, so that no structure which is easy to block such as steps and the like exists in the motion range of the whole guide claw 34, thereby ensuring the operation flexibility of the valve clack frame 3 and preventing the failure of the check function; the improved structure has the advantages of small opening pressure, flexible opening and closing, small flow resistance, good sealing performance, high use reliability and the like.

The above description is only an embodiment of the present invention, and it should be understood by those skilled in the art that any structural design equivalent to this embodiment is included in the scope of the present invention.

Claims (10)

1. A check valve for direct drinking water comprises a valve body (1), a water inlet valve cover (2) hermetically arranged at the water inlet end of the valve body, a valve flap frame (3), a check spring (5) and a valve flap (4) arranged in the valve body (1), the valve clack is arranged at the front part of the valve clack frame (3), the non-return spring (5) pushes the rear part of the valve clack frame (3) to further drive the valve clack (4) to seal the water inlet valve cover (2) to form a non-return structure, it is characterized in that the valve flap frame (3) is composed of a main body (31) which is integrally formed and is positioned in the middle part, a valve flap mounting head (32) positioned in the front part and a spring mounting head (33) positioned in the rear part, the outer circumferential surface of the main body (31) is provided with a plurality of guide claws (34) which are uniformly distributed on the circumference, and the outer edge line (341) of each guide claw is attached to the inner wall of the main body (31) in a sliding way to form axial movement guide.

2. A check valve for direct drinking water according to claim 1, wherein the front end of each guide claw (34) is integrally fixed on the outer circumferential surface of the main body (31), the rear end of each guide claw (34) extends backwards and is suspended, the rear ends of the plurality of guide claws (34) enclose the spring mounting head (33), and the outer edge line (341) of each guide claw (34) is a straight line.

3. A check valve for direct drinking water according to claim 1, wherein the outer surface of the main body (31) is an arc surface (311), the arc of the front end of the arc surface is the largest, and the arc degree is gradually reduced from the front to the back.

4. A check valve for direct drinking water as claimed in claim 1, wherein said valve flap mounting head (32) is tapered and said spring mounting head (33) is mushroom-shaped.

5. A check valve for direct drinking water as claimed in claim 4, wherein the valve flap mounting head (32) is provided at its root with a ring of front ring groove (321), and the valve flap (4) is fitted and fixed in the front ring groove (321).

6. A check valve for direct drinking water as claimed in claim 4, wherein the spring mounting head (33) is provided at its base with a ring of rear ring groove (331), and the end of the check spring (5) is fitted and fixed in the rear ring groove (331).

7. A check valve for direct drinking water as claimed in claim 6, wherein the check spring (5) is a conical spring with a small front end and a large rear end, the conical spring is directionally sleeved outside the spring mounting head (33), and the smaller front end is embedded and fixed in the rear annular groove (331).

8. A check valve for direct drinking water according to claim 7, characterized in that the inner wall of the valve body (1) is provided with a ring of inner shoulder, the inner shoulder is provided with a positioning ring groove (11), and the larger rear end of the check spring (5) is positioned and installed in the positioning ring groove (11).

9. A check valve for direct drinking water according to claim 1, characterized in that the inner wall of the inlet valve cover (2) is provided with a stepped annular sealing surface (21), and the valve flap (4) seals and closes the annular sealing surface (21).

10. The check valve for direct drinking water as claimed in claim 1, wherein the valve flap frame (3) is made of PPSU environment-friendly engineering plastic, the valve body (1) and the water inlet valve cover (2) are made of HPb59-1 environment-friendly brass, the check spring (5) is made of 304 food grade stainless steel, and the valve flap (4) is made of silicon rubber.

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