CN203654415U - Anti-siphon structure of water inlet valve - Google Patents

Abstract

The utility model discloses an anti-siphon structure of a water inlet valve, which comprises an inner core pipe, a water inlet pipe body, a water stop mechanism, a sealing gasket and a sealing seat; an air inlet hole is opened on the sealing seat, and the sealing seat and the sealing gasket are arranged in cooperation; The inner core tube is sleeved in the water inlet pipe body, and the water inlet channel is set in the inner core tube, and the water outlet of the water inlet channel is opened or closed by the water stop mechanism; the water outlet channel is set between the inner core tube and the water inlet pipe body; A fitting surface is formed on the inner core tube. When water enters, the water inlet of the inner core tube is separated from the water stop mechanism and opened, the gasket and the fitting surface are opened and the air inlet hole on the sealing seat is blocked to form a transition channel , the transition channel connects the water inlet channel with the water outlet channel. When the water inlet is stopped, the water inlet of the inner core tube is blocked and closed by the water stop mechanism. At this time, the gasket returns to fit the fitting surface again. An airflow channel is arranged between the surfaces. The utility model has the advantages of simple structure, good anti-siphon effect, and accurate labeling of CL lines.

Description

An anti-siphon structure of water inlet valve

technical field

The utility model relates to a water inlet valve, in particular to an anti-siphon structure of the water inlet valve.

Background technique

In the prior art, the water inlet valve includes an inner core pipe, a water inlet pipe body, a water stop mechanism, a sealing gasket and a sealing seat; In the water pipe body, a water inlet channel is set in the inner core tube, and the water outlet of the water inlet channel is opened or closed by the water stop mechanism; a water outlet channel is set between the inner core tube and the water inlet pipe body; a sticker is formed on the inner core tube Joint surface, in the state of water intake, the water inlet of the inner core tube is separated from the water stop mechanism, the gasket and the joint surface are opened and the air intake hole on the sealing seat is blocked, thereby forming a transition channel, which will enter The water channel is connected to the water outlet channel, and the water flow enters the water outlet channel from the water inlet channel through the transition channel, and then enters the water tank; when the water level in the water tank reaches a certain height, the water inlet of the inner core tube is blocked and closed by the water stop mechanism, which is to stop the water inlet. Under the water state, at this time, the sealing gasket will return to fit with the fitting surface again.

Among them, the water stop mechanism usually includes a top cover, a water stop pad, a back pressure pad, a swing arm and a buoy. The water inlet at the upper end of the pipe is opposite, and the periphery of the water-stop pad is fixed between the top cover and the top cover to form a back pressure chamber. The pressure hole and the water inlet hole are respectively connected with the back pressure chamber. The middle section of the swing arm is pivotally arranged on the top cover. One end of the swing arm is facing the back pressure hole and a back pressure pad is installed. There are seals between each component to ensure watertightness.

When the water is suddenly cut off, a large negative pressure is formed in the inner core tube, and the water inlet of the inner core tube is blocked and closed by the water stop mechanism. The water outlet channel is cut off to play an anti-siphon effect, however, its anti-siphon effect is still unsatisfactory.

At the same time, when the water inlet valve needs to be marked with the CL line (anti-siphon line) when it leaves the factory, it is usually necessary to conduct a destructive test on the gasket of the water inlet valve, such as placing a steel wire between the gasket and the fitting surface, so as to determine the test. The position of the CL line is marked on the body of the water inlet valve, but the size and shape of the steel wire between the gasket and the fitting surface are different, which easily causes a large error in the labeling of the CL line, which in turn causes a large error in the installation of the water inlet valve. It is easy to produce siphon phenomenon and pollute the water source.

Utility model content

The purpose of the utility model is to provide an anti-siphon structure of a water inlet valve, which has a simple structure, good anti-siphon effect, and accurate labeling of CL lines.

In order to achieve the above object, the solution of the present utility model is:

An anti-siphon structure of a water inlet valve, comprising an inner core pipe, a water inlet pipe body, a water stop mechanism, a sealing gasket and a sealing seat; an air inlet hole is opened on the sealing seat, and the sealing seat and the sealing gasket are arranged in cooperation; the inner core pipe sleeve In the water inlet pipe body, a water inlet channel is set in the inner core tube, and the water outlet of the water inlet channel is opened or closed by the water stop mechanism; a water outlet channel is set between the inner core tube and the water inlet pipe body; on the inner core tube Form a fitting surface. When water enters, the water inlet of the inner core tube is separated from the water stop mechanism and opened, the gasket and the fitting surface are opened and the air inlet hole on the sealing seat is blocked, thereby forming a transition channel, and the transition channel will The water inlet channel is connected with the water outlet channel. When the water inlet is stopped, the water inlet of the inner core tube is blocked and closed by the water stop mechanism. At this time, the gasket is restored to fit the fitting surface again. There are airflow channels.

Further, an axial annular boss is formed on the outer side of the water inlet at the upper end of the inner core pipe, the top surface of the annular boss is a bonding surface, and grooves or raised points are arranged on the annular boss, so that the gap between the gasket and the annular boss Airflow channels are formed between the mating surfaces.

Further, an annular positioning piece is installed inside the annular boss, the top surface of the positioning piece is an adhering surface, grooves or raised points are arranged on the positioning piece, so that an air flow channel is formed between the gasket and the positioning piece.

Further, a protruding ring is formed on the outer wall of the water inlet at the upper end of the inner core tube, and the top surface of the protruding ring is a bonding surface, and grooves or raised points are arranged on the protruding ring, so that an air flow channel is formed between the gasket and the protruding ring.

After adopting the above scheme, the utility model is provided with an air flow channel between the sealing pad and the bonding surface. When the inner core tube suddenly cuts off the water and a large negative pressure is formed, the airflow can enter the inner core tube from the airflow channel to release the pressure, the anti-siphon effect is ideal, and the structure is relatively simple and the manufacturing cost is low.

At the same time, when the water inlet valve is marked with the CL line (anti-siphon line), since there is an air flow channel between the gasket and the fitting surface, there is no need to place a steel wire between the gasket and the fitting surface when performing the siphon test , so that the CL line is marked more accurately, which in turn makes the installation of the water inlet valve more accurate, and it is not easy to produce siphon phenomenon and pollute the water source.

Description of drawings

Fig. 1 is a cross-sectional view of the water inlet state of the first embodiment of the utility model;

Fig. 2 is another angle sectional view of the first embodiment of the utility model in the state of water ingress;

Fig. 3 is a cross-sectional view of the water-stopping state of the first embodiment of the utility model;

Fig. 4 is a cross-sectional view of the siphon state of the first embodiment of the utility model;

Fig. 5 is a schematic diagram of the first embodiment of the utility model in which bumps are set on the annular boss;

Fig. 6 is a schematic diagram of the groove structure provided on the annular boss in the first embodiment of the present utility model;

Fig. 7 is a schematic diagram of the structure of bumps provided on the positioning sheet in the first embodiment of the present invention;

Fig. 8 is a schematic diagram of the groove structure provided on the positioning piece in the first embodiment of the present invention;

Fig. 9 is an exploded view of the second embodiment of the utility model looking up;

Fig. 10 is an exploded view of the second embodiment of the utility model in a top view;

Fig. 11 is an exploded view of the third embodiment of the utility model (pit type);

Figure 11A is a partially enlarged view of Figure 11;

Fig. 12 is an exploded view of the third embodiment of the utility model (bump type);

Figure 12A is a partially enlarged view of Figure 12;

Fig. 13 is a sectional view of the third embodiment of the utility model in the state of water ingress;

Fig. 14 is another angle sectional view of the third embodiment of the utility model in the state of water ingress;

Fig. 15 is an exploded view of the third embodiment of the utility model;

Fig. 16 is a schematic structural view of the inner core tube of the third embodiment of the present invention.

Label description

Water inlet pipe body 1 inner core pipe 11

Water inlet channel 111 Water outlet channel 112

Annular boss 12 Groove 121

Bump 122 Positioning piece 13

groove 131 bump 132

Protruding ring 14 Groove 141

bump 142 rib 15

Water stop seat 16 Seal seat 2

Back pressure hole 21 Gasket 3

Water stop mechanism 4 back pressure pad 41

Swing arm 42 float 43

Top cover 44 Water-stop pad 45

Back pressure hole 46 .

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in detail.

Referring to Fig. 1 to Fig. 8, the first embodiment of an anti-siphon structure of a water inlet valve disclosed by the utility model includes a water inlet pipe body 1, an inner core pipe 11, a sealing seat 2, a gasket 3 and a water stop mechanism 4.

In this embodiment, the water stop mechanism 4 is composed of a seal seat 2, a seal pad 3, a back pressure pad 41, a swing arm 42 and a buoy 43, that is, the seal pad 3 also functions as a water stop pad, and the seal seat 2 also functions as a water stop pad. The function of the top cover makes the overall structure simpler.

An air inlet hole (not shown in the figure) is opened on the sealing seat 2, and the sealing seat 2 and the sealing gasket 3 are arranged in cooperation. The sealing seat 2 is installed on the upper end of the water inlet pipe body 1, the sealing gasket 3 is arranged in the sealing seat 2, and the back pressure hole 21 is opened on the sealing seat 2, the middle section of the swing arm 42 is pivotally arranged on the sealing seat 2, and the swing arm 42 One end is facing the back pressure hole 21 and a back pressure pad 41 is installed, the other end of the swing arm 42 is connected with the adjusting rod of the buoy 43, and a seal is provided between each component to ensure watertightness.

The inner core tube 11 is sleeved in the water inlet pipe body 1 , and a water inlet channel 111 is set in the inner core tube 11 , and the water outlet of the water inlet channel 111 is opened or closed by the water stop mechanism 4 . A water outlet channel 112 is provided between the inner core pipe 11 and the water inlet pipe body 1 .

A bonding surface is formed on the inner core tube 11. When water enters, the water inlet of the inner core tube 11 is separated from the water stop mechanism 4 and opened, and the sealing gasket 3 and the bonding surface are opened to block the air inlet hole on the sealing seat 2. to form a transition channel, the transition channel connects the water inlet channel 111 with the water outlet channel 112, when the water intake is stopped, the water inlet of the inner core tube 11 is blocked by the water stop mechanism 4 and closed, at this time the gasket 3 is restored and attached The bonding surface is bonded, and an air flow channel is arranged between the gasket 3 and the bonding surface.

In this embodiment, as shown in Figure 5, an axial annular boss 12 is formed outside the water inlet at the upper end of the inner core pipe 11, the top surface of the annular boss 12 is a bonding surface, and grooves are arranged on the annular boss 12 121 (as shown in FIG. 6 ) or bumps 122 (as shown in FIG. 5 ), so that an air flow channel is formed between the sealing gasket 3 and the bonding surface of the annular boss 12 . When the water in the inner core tube 11 is cut off suddenly and a large negative pressure is formed, the gas can enter the inner core tube 11 from the air flow channel for pressure relief, and the anti-siphon effect is ideal.

In this embodiment, an annular positioning piece 13 is installed inside the annular boss 12, and a groove 131 (as shown in Figure 8) or a raised point 132 (as shown in Figure 7) is arranged on the positioning piece 13, so that the gasket 3 and the positioning piece 13 form an air flow channel to further improve the anti-siphon effect.

Certainly also can only be provided with groove 131 or protruding point 132 on positioning piece 13, make the airflow channel be formed between water-stop pad 3 and positioning piece 13, and not be provided with groove 121 or protruding point 12 on annular boss 12 any more. Point 122, which also achieves a relatively ideal anti-siphon effect.

The utility model is provided with an air flow channel between the sealing pad 3 and the fitting surface. In this embodiment, a groove 121 or a bump 122 is provided on the annular boss 12, so that the sealing pad 3 and the annular boss 12 form a Airflow channel. When the inner core tube 11 suddenly cuts off the water and a large negative pressure is formed, the air flow can enter the inner core tube 11 from the air flow channel for pressure relief, the anti-siphon effect is ideal, and its structure is relatively simple and the manufacturing cost is low.

At the same time, when the water inlet valve is marked with the CL line (anti-siphon line), since there is an air flow channel between the gasket 3 and the fitting surface, there is no need to install the airflow channel between the gasket 3 and the fitting surface when performing the siphon test. The pad steel wire makes the CL line label more accurate, which in turn makes the installation of the water inlet valve more accurate, and it is not easy to produce siphon phenomenon and pollute the water source.

Referring to Fig. 9 to Fig. 10, the utility model discloses a second embodiment of an anti-siphon structure of a water inlet valve, the structure of which is the same as that of the first embodiment, and the model of the water inlet valve is A207 or A208, as shown in Fig. 10 As shown, a groove 121 is provided on the annular boss 12 .

Referring to Fig. 11 and Fig. 16, the utility model discloses a third embodiment of an anti-siphon structure of a water inlet valve. , gasket 3 and water stop mechanism 4.

In this embodiment, the water stop mechanism 4 is composed of a back pressure pad 41 , a swing arm 42 , a buoy 43 , a top cover 44 and a water stop pad 45 .

The lower end of the water inlet pipe body 1 is installed on the water supply pipe of the water tank, the top cover 44 is installed on the upper end of the water inlet pipe body 1, and the water stop pad 45 is installed in the top cover 44, relative to the water inlet on the inner core pipe 11 upper ends. The back pressure hole 46 is provided on the top cover 44, the middle section of the swing arm 42 is pivotally arranged on the top cover 44, one end of the swing arm 42 is facing the back pressure hole 46 and a back pressure pad 41 is installed, the other end of the swing arm 42 is connected to the buoy 43 The adjustment rod is connected, and the seals are provided between each component to ensure watertightness.

An air inlet (not shown in the figure) is opened on the sealing seat 2 , and the sealing seat 2 and the sealing gasket 3 are set together. In this embodiment, the sealing seat 2 and the sealing gasket 3 are sequentially sleeved on the inner core tube 11 .

The inner core tube 11 is sleeved in the water inlet pipe body 1 , and a water inlet channel 111 is set in the inner core tube 11 , and the water outlet of the water inlet channel 111 is opened or closed by the water stop mechanism 4 . A water outlet channel 112 is provided between the inner core pipe 11 and the water inlet pipe body 1 , and the water outlet channel 112 and the water inlet channel 111 are independent of each other.

A bonding surface is formed on the inner core tube 11. In the state of water inflow, the water inlet of the inner core tube 11 is separated from the water stop mechanism 4 and opened, and the sealing gasket 3 and the bonding surface are opened and the air inlet hole on the sealing seat 2 is opened. Blocked, thereby forming a transition channel, the transition channel communicates the water inlet channel 111 with the water outlet channel 112 . In the state of stopping the water inlet, the water inlet of the inner core tube 11 is blocked and closed by the water stop mechanism 4. At this time, the sealing gasket 3 returns to fit the fitting surface again, and an air flow channel is arranged between the sealing gasket 3 and the fitting surface .

In this embodiment, a protruding ring 14 is formed on the outer wall of the water inlet at the upper end of the inner core pipe 11. The top surface of the protruding ring 14 is a bonding surface, and a groove 141 is provided on the protruding ring 14 (as shown in FIG. 11A ) or The protruding points 142 (as shown in FIG. 12A ) form an air flow channel between the gasket 3 and the protruding ring 14 . In this embodiment, the protruding ring 14 is connected to the water stop seat 16 through a plurality of ribs 15 .

In the first embodiment, an axial annular boss 12 is formed outside the water inlet at the upper end of the inner core pipe 11. The top surface of the annular boss 12 is a fitting surface, and grooves 121 or raised points are arranged on the annular boss 12. 122, so that an airflow passage is formed between the sealing gasket 3 and the bonding surface of the annular boss 12. In this embodiment, the airflow passage is formed above the water inlet at the upper end of the inner core pipe 11, and the sealing gasket 3 and the water-stop pad are integrally formed , and the sealing seat 2 is integrally formed with the top cover. The second embodiment has the same structure as the first embodiment.

In the third embodiment, a protruding ring 14 is formed on the outer wall of the water inlet at the upper end of the inner core pipe 11. The top surface of the protruding ring 14 is a bonding surface, and grooves 141 or convex points 142 are set on the protruding ring 14, so that An airflow channel is formed between the gasket 3 and the convex ring 14. In this embodiment, the airflow channel is formed below the water inlet at the upper end of the inner core tube 11, and the gasket 3 and the water-stop pad are formed independently, and the sealing seat 2 and the top cover are also formed Formed independently.

The above descriptions are only preferred embodiments of the present utility model, and are not limitations on the design of this case. All equivalent changes made according to the design key of this case all fall within the scope of protection of this case.

Claims (4)

1. an anti-syphon structure for water intaking valve, is characterized in that: comprise inner core tube, water inlet pipe body, Water stop mechanism, sealing mat and seal receptacle; On seal receptacle, have air inlet, seal receptacle and sealing mat are equipped with; Inner core tube is enclosed within water inlet pipe body, and intake tunnel is set in inner core tube, and the delivery port of intake tunnel is opened or closed by Water stop mechanism control; Between inner core tube and water inlet pipe body, set out aquaporin; In inner core tube, form binding face, in the time of water inlet, the water inlet of inner core tube separates and opens with Water stop mechanism, sealing mat and binding face are opened and the air inlet on seal receptacle are blocked, thereby form transition passage, and transition passage communicates intake tunnel with exhalant canal, in the time stopping into water, the water inlet of inner core tube is stopped up and closes by Water stop mechanism, and now sealing mat is replied and binding face laminating again, between sealing mat and binding face, is provided with gas channel.

2. the anti-syphon structure of a kind of water intaking valve as claimed in claim 1, it is characterized in that: form axial annular boss in inner core tube upper end water inlet outside, the end face of this annular boss is binding face, groove or salient point are set on annular boss, make to form gas channel between sealing mat and the binding face of annular boss.

3. the anti-syphon structure of a kind of water intaking valve as claimed in claim 1 or 2, it is characterized in that: in annular boss inner side, annular locating tab is installed, the end face of this spacer is binding face, is provided with groove or salient point on spacer, makes to form gas channel between sealing mat and spacer.

4. the anti-syphon structure of a kind of water intaking valve as claimed in claim 1, it is characterized in that: on the outer wall of inner core tube upper end water inlet, form bulge loop, the end face of this bulge loop is binding face, and groove or salient point are set on bulge loop, makes to form gas channel between sealing mat and bulge loop.

Images