CN209990969U

CN209990969U - Anti-return vacuum angle valve

Info

Publication number: CN209990969U
Application number: CN201920838215.9U
Authority: CN
Inventors: 李响林; 郑桂凤; 周兴良
Original assignee: Zhejiang Best & Honest Electromechanics Co Ltd
Current assignee: Zhejiang Best & Honest Electromechanics Co Ltd
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2020-01-24
Anticipated expiration: 2029-06-04

Abstract

The utility model provides a backflow-preventing vacuum angle valve belongs to mechanical technical field. It has solved the problem that prevents that water pipe negative pressure from causing the pipeline to break. The anti-backflow vacuum angle valve comprises a valve body with a water inlet end and a water outlet end, a water through hole I is arranged between the water inlet end and the water outlet end in the valve body, a valve core assembly capable of controlling the water through hole to be opened or closed is arranged on the valve body, a check valve is fixed in the water inlet end, an air inlet hole is formed in the outer side of the valve body, the air inlet hole is communicated with the water inlet end through the water through hole I, the water outlet end is communicated with the air inlet hole, a gland is fixed at the port of the air inlet hole, a seal is formed. This backflow-preventing vacuum angle valve prevents effectively that negative pressure from appearing in the pipeline and prevents that the water pipe from breaking.

Description

Anti-return vacuum angle valve

Technical Field

The utility model belongs to the technical field of machinery, a angle valve is related to, especially, relate to a vacuum angle valve prevents flowing back.

Background

In daily life, people often directly butt joint the water pump or the washing machine with a water pipe when installing the electric appliances. The water pump or the washing machine has a water pumping function, and when the water pump or the washing machine is in an operating state, water is cut off or water pressure is unstable, so that dry pumping is caused to cause negative pressure in a water pipe. The negative pressure in the pipeline may break the pipeline, and if the negative pressure is not found in time, the irreparable loss is caused when the water pipe is normally filled with water. How to prevent the pipeline rupture that negative pressure leads to in the water pipe is the problem that we are reluctant to solve at present.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide an anti-return vacuum angle valve, the technical problem that solve prevents how the water pipe negative pressure from causing the pipeline to break.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides an anti-return vacuum angle valve, is including having the valve body of end of intaking and play water end, the valve body is inherent to be equipped with water hole one between end of intaking and the play water end, is equipped with the case subassembly that can control the water hole and open or close a dozen on the valve body, and the end internal fixation of intaking has a check valve, its characterized in that, the valve body outside has the inlet port and crosses water hole one and is linked together the inlet port with the end of intaking, goes out water end and inlet port and is linked together, and the port department of inlet port is fixed with the gland and forms sealedly between the two, and the gland is both ends open-ended cylindric, and sliding connection has the core in the gland, is equipped with the admission clearance between core lateral wall and the gland inside wall, and.

The water inlet end is provided with a check valve which is used for preventing water from flowing backwards after the water pressure is unstable, and the check valve has the function of protecting a pipeline and improves the stability. The first water through hole is used for communicating the air inlet hole, the water inlet end and the water outlet end with each other, wherein the air inlet hole is formed between the water inlet end and the water outlet end. The function of the suction type water inlet and outlet device is that when the water inlet end stops water, the air inlet hole can suck air to supplement the suction force of the water outlet end, so that negative pressure is prevented from occurring in the pipeline.

The gland is in threaded connection with the air inlet hole, so that the installation is convenient, the gland is not easy to fall off, and the threaded connection has certain sealing performance like the ordinary bottle cap.

The gland is both ends open-ended cylindric, is the cavity that has of fretwork in the middle of the tubular structure and can hold the core, and core and gland sliding fit are equipped with air intake gap between core lateral wall and the gland inside wall. The inner end of the core extends out of the inner end of the gland and is sleeved with a sealing gasket which can abut against the inner end of the gland to form sealing. The sliding fit has the advantage that the core can be easily ejected when air is supplied, and an air inlet passage is formed in the valve cover through the air inlet gap. When water enters, the water pressure can press the core to abut against the inner end of the gland, and the core and the inner end of the gland are provided with the sealing gasket to play a good sealing effect, so that water leakage can be well prevented.

In foretell anti-return vacuum angle valve, the core includes guide post and links firmly in the inner location head of guide post, and sealed the pad cover is on the location head, and the guide post external diameter is less than the gland internal diameter, and the inner outside of guide post is equipped with a plurality of lugs along circumference, and the guide post forms clearance fit through each lug and gland.

The core comprises a positioning head exposed outside the gland and a guide post arranged in the cavity of the gland. The guide post is fixedly connected with the positioning head. The guide post external diameter is less than the gland internal diameter, just can form the air inlet gap, makes things convenient for gaseous smooth to pass through. The outer side of the inner end of the guide post is provided with a plurality of convex blocks along the circumferential direction, and the guide post is in clearance fit with the gland through the convex blocks. When the core leans against the inner port of the gland, the outer diameter of the guide post is smaller than the inner diameter of the gland, so that the core is prone to leaning against the inner port of the gland, and poor sealing effect is caused. The convex block has the function of ensuring that the guide column is not easy to skew in clearance fit with the inner end surface of the gland, and plays a role in guiding. And the design of the lug does not influence the air circulation, when air needs to be fed, the air passage in the gland is not influenced by the lug, and the air can flow through the gap between the lug and the lug.

In the anti-backflow vacuum angle valve, the outer end face of the guide post is provided with a lightening hole.

The weight of the core can be reduced by the weight reducing holes, so that the core can slide open to allow air to enter in the first time of water cut-off. The reaction of the core is made faster by reducing the weight.

In the anti-backflow vacuum angle valve, the outer side of the positioning head is provided with an annular blocking shoulder, and the inner end surface of the sealing gasket abuts against the outer end surface of the annular blocking shoulder.

The advantage that the shoulder is kept off to the annular is when rivers pass through, and sealed the setting of filling up keeps off between the port in shoulder and the gland in the annular, thereby enables sealed the more even effect that reaches sealed effect of filling up the atress. And the diameter of the annular retaining shoulder is the same as that of the inner port of the gland, so that the positioning head can be effectively prevented from being flushed into the gland due to overlarge water flow, and a limiting effect is also achieved.

In the anti-backflow vacuum angle valve, a water passing hole II which is used for communicating the water passing hole I with the air inlet hole is arranged in the valve body, an outer end opening of the water passing hole II is opposite to the annular retaining shoulder, the outer diameter of the annular retaining shoulder is larger than the inner diameter of the water passing hole II, and the length of the guide column in the gland is larger than the distance between the outer end face of the annular retaining shoulder and the surface where the outer end opening of the water passing hole is located.

The outer port of the water passing hole II is over against the annular retaining shoulder, so that the annular retaining shoulder can be stressed uniformly when water flows, the sealing effect of the core and the gland is greatly increased, and the core is prevented from being inclined to affect the sealing property by side impact. The external diameter that the annular kept off the shoulder is greater than the internal diameter of water hole two, prevents that the air current from too big making the excessive displacement of core move into water hole two when admitting air in, and unable playback makes whole valve body scrap when normally intaking, and the effect of playing is the displacement of restriction core. The length of the guide post in the gland is greater than the distance between the outer end face of the annular retaining shoulder and the surface where the outer end port of the water outlet hole is located, when the core is displaced to the inner end face of the annular retaining shoulder and is abutted against the outer end face of the water outlet hole, a part of the guide post on the core is remained in the cavity of the gland, the whole core cannot be separated from the inside of the gland due to the fact that the core achieves the maximum displacement, and the core cannot return when water enters the gland. The displacement of the core is limited, water leakage caused by the fact that the core cannot return is prevented, and the safety of the valve body is guaranteed.

In the anti-backflow vacuum angle valve, the gland is in threaded connection with the air inlet hole, the inner side of the outer port of the gland is provided with the convex ring, and the central hole of the convex ring is the inner hexagonal hole.

The inner side of the outer port of the gland is provided with a convex ring, and the central hole of the convex ring is an inner hexagonal hole. The action of the valve core is to prevent the core from excessively moving towards the valve cover due to overlarge water flow and overlarge acting force acting on the annular retaining shoulder, and the existence of the convex ring can effectively enable the outer port of the guide column to abut against the inner end face of the convex ring, so that the core is prevented from excessively moving and being damaged. In addition, the gland is in threaded connection with the air inlet, and the center hole of the convex ring is a hexagon socket. Can use special instrument to install or dismantle the gland, prevent artificially to destroy or steal the gland, improve the security of valve body greatly.

In foretell anti-return vacuum angle valve, the gland outer end outside is equipped with annular barrier portion, and the gland outer end cover is equipped with the sealing washer, and the sealing washer supports and leans on at annular barrier portion inner.

The annular blocking part enables the gland to be firmly fixed on the valve body, and meanwhile, the gland is prevented from being excessively assembled and is not easy to disassemble. The existence of the annular blocking part also plays a certain sealing role, and the sealing ring is abutted against the inner end of the annular blocking part, so that the sealing effect of the gland and the air passing hole is improved.

Compared with the prior art, the anti-backflow vacuum angle valve has the advantages that the gland is arranged on the air inlet hole, the core is arranged in the gland, the water inlet hole can be sealed when water enters, air can enter from the air inlet gap in the gland when water is cut off, and negative pressure is effectively prevented from occurring in a pipeline.

Drawings

FIG. 1 is a cross-sectional view of a backflow-prevention vacuum angle valve.

Fig. 2 is an enlarged view at a in fig. 1.

In the figure, 1, a valve body; 11. a water inlet end; 12. a water outlet end; 13. a first water through hole; 14. an air inlet; 15. a water passing hole II; 2. a valve core assembly; 3. a check valve; 4. a gland; 41. a convex ring; 42. an inner hexagonal hole; 43. an annular barrier; 5. a core; 51. a guide post; 52. positioning the head; 53. a bump; 54. lightening holes; 55. an annular shoulder; 6. a gasket; 7. and (5) sealing rings.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

As shown in FIG. 1, in a backflow prevention vacuum angle valve, a check valve 3 is provided in a water inlet port 11 to effectively prevent backflow of water when water pressure is unstable, and the check valve 3 is not explained herein for the prior art. The water inlet end 11, the valve core component 2, the air inlet 14 and the water outlet end 12 are connected in sequence through the water through hole I13. The valve core assembly 2 can play a role in controlling the opening or closing of the water through hole one 13, and the valve core assembly 2 is the prior art and is not explained here.

As shown in fig. 2, the air inlet 14 is connected with the gland 4 by screw thread, the inner side of the outer port of the gland 4 is provided with a convex ring 41, the convex ring 41 can play a role of limiting the movement range of the core 5, and the excessive movement of the core is prevented from crushing the sealing gasket 7 or damaging the annular retaining shoulder 55. The centre bore of bulge loop 41 is interior hexagonal hole 42, uses then can dismantle or install gland 4 with hexagonal hole 32 assorted instrument, and easy operation is convenient, and has prevented effectively that the people from destroying the gland, improves the security. The outside of the outer end of the gland 4 is provided with an annular blocking part 43 protruding outwards, so that the gland 4 can be accurately positioned and installed, the excessive assembly of the gland 4 cannot be difficult to disassemble due to excessive force, and the existence of the annular blocking part 43 also increases the sealing performance of the gland 4 and the air inlet 14. The outer end of the gland 4 is sleeved with a sealing ring 7, the sealing ring 7 is abutted against the inner end of the annular blocking part 43, and the sealing performance between the gland 4 and the air inlet hole 14 is greatly improved.

The core 5 comprises guide posts 51 and a positioning head 52. The diameter of the outer peripheral surface of the guide post 51 is smaller than that of the inner peripheral surface of the inner cavity of the gland 4, and a gap formed therebetween is called an air inlet gap for the passage of air when air is introduced. The outer side of the inner end of the guide post 51 is provided with a plurality of lugs 53, the guide post 51 forms clearance fit with the gland 4 by virtue of the lugs 53, and meanwhile, a clearance is reserved between the adjacent lugs 53 to prevent air from entering. The guide post 51 is also provided with lightening holes 54, so that the weight of the whole core 5 is lightened, and the core 5 can slide on the gland 4 more smoothly. The positioning head 52 is provided with an annular retaining shoulder 55, and the outer end faces of the annular retaining shoulder 55, the sealing gasket 6 and the inner end face of the gland 4 are all flush. So that the sealing effect of the gland is uniformly improved by the stress when the sealing gasket 6 is extruded.

As shown in fig. 1-2, the second water passing hole 15 functions to communicate the air intake hole 14 with the first water passing hole 13. And the outer port of the water through hole II 15 is over against the inner end surface of the annular retaining shoulder 55, and when water flows through, the acting force can be uniformly acted on the annular retaining shoulder 55 to improve the sealing performance of the gland. The diameter of the outer peripheral surface of the annular retaining shoulder 55 is larger than the inner diameter of the second water passing hole 15, the distance between the annular retaining shoulder 55 and the second water passing hole 15 is smaller than the length of the guide post 51 in the cavity of the gland 4, the core 5 is prevented from excessively sliding to enter the second water passing hole 15, and the core cannot return to the original position to influence normal use when water passes through.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The anti-backflow vacuum angle valve comprises a valve body (1) with a water inlet end (11) and a water outlet end (12), wherein a water through hole I (13) is arranged between the water inlet end (11) and the water outlet end (12) in the valve body (1), a valve core assembly (2) capable of controlling the water through hole I (13) to be opened or closed is arranged on the valve body (1), a check valve (3) is fixed in the water inlet end (11), the anti-backflow vacuum angle valve is characterized in that an air inlet hole (14) is formed in the outer side of the valve body (1), the air inlet hole (14) is communicated with the water inlet end (11) through the water through hole I (13), the water outlet end (12) is communicated with the air inlet hole (14), a gland (4) is fixed at the port of the air inlet hole (14) and forms a seal between the air inlet hole and the air inlet hole I, the gland (4) is in a cylindrical shape with openings at two ends, a, the inner end of the core (5) extends out of the inner end of the gland (4), and a sealing gasket (6) which can abut against the inner end of the gland (4) to form sealing is sleeved on the inner end of the core (5).

2. The vacuum angle valve of claim 1, wherein the core (5) comprises a guide post (51) and a positioning head (52) fixedly connected to the inner end of the guide post (51), the sealing gasket (6) is sleeved on the positioning head (52), the outer diameter of the guide post (51) is smaller than the inner diameter of the gland (4), a plurality of convex blocks (53) are arranged on the outer side of the inner end of the guide post (51) along the circumferential direction, and the guide post (51) is in clearance fit with the gland (4) through the convex blocks (53).

3. The vacuum angle valve of claim 2, characterized in that the outer end face of the guide post (51) is provided with lightening holes (54).

4. The vacuum angle valve of claim 2, characterized in that the positioning head (52) is provided with an annular shoulder (55) on the outside, and the inner end surface of the sealing gasket (6) abuts against the outer end surface of the annular shoulder (55).

5. The vacuum angle valve of claim 4, characterized in that a water through hole II (15) is arranged in the valve body (1) and connects the water through hole I (13) with the air inlet hole (14), the outer port of the water through hole II (15) is opposite to the annular retaining shoulder (55), the outer diameter of the annular retaining shoulder (55) is larger than the inner diameter of the water through hole II (15), and the length of the guide column (51) in the gland (4) is larger than the distance between the outer end surface of the annular retaining shoulder (55) and the surface of the outer port of the water through hole II (15).

6. The vacuum angle valve of claim 1, characterized in that the gland (4) is screwed to the air inlet hole (14), the inner side of the outer port of the gland (4) is provided with a convex ring (41), and the central hole of the convex ring (41) is a hexagon socket (42).

7. The vacuum angle valve of claim 1, characterized in that, the outer end of the gland (4) is provided with an annular stop part (43), the outer end of the gland (4) is sleeved with a sealing ring (7), and the sealing ring abuts against the inner end of the annular stop part (43).