KR101350380B1 - Backflow preventer that is driven by double flexible packing unit for toilet - Google Patents

Abstract

Disclosed is a structure for preventing the backflow of water in a toilet tank, wherein the structure has a dish-shaped flexible outdoor air inflow packing (30) installed at a breathable outdoor air inflow cap (13) installed in a high-pressure water flowing space (A) and a donut-shaped flexible backflow preventing packing (40) installed between a high-pressure water inlet (11) and a fill valve (20). The present invention relates to a technology for improving the operational reliability and durability of the backflow preventing packing and parts related to the same in a device for preventing the backflow of water in an existing toilet, emphasizes an adhesion holding force than an elastic restoring force in the outdoor air inflow packing (30), and focuses on an elastic stress than an adhesion holding force in the backflow preventing packing (40). The outdoor air inflow packing blocks the water pressure leakage from the high-pressure water flowing space by almost maintaining the adhering condition thereof unless a minimum washing water pressure is not maintained or a strong vacuum pressure is generated. The backflow preventing packing is freely deformed to a lower side in which a deformation inducing ring does not exist, and is properly curled to the inside of the deformation inducing ring in order to quickly secure an air inlet path when a vacuum pressure is generated. According to the present invention, a toilet user is capable of feeling a pleasant sense of the washing water inflow and the sense of high washing water pressure while using the toilet as if the user uses a toilet from which a backflow preventing function is removed in contrast to the existing toilet applied with the backflow preventing function.

Description

Backflow preventer that is driven by double flexible packing unit for toilet

The present invention relates to a technique for improving the operation reliability and durability of the related parts including the backflow prevention packing in the backflow prevention device of the conventional toilet which has been installed inside the fill valve of the ball tap to perform the backflow prevention function of the tank storage water.

The water tank type toilet is usually supplied with high pressure water from a water pipe in a building by a ball tap and stored in a water tank, and used for washing water.

The ball tap, which is used to open and close the high pressure water valve by using the change of the tank water level, is the pressure chamber of the fill valve by opening or closing the pressure water discharge hole by the lifting and lowering motion of the float in conjunction with the tank water level. Drain or fill the pressure water in the space. The discharge and filling of the pressure water leads to the opening and closing of the fill valve diaphragm, which can easily control the supply and shut off of the high pressure water.

The high pressure water pipes connected to the fill valves must always be filled with high pressure water to maintain the water pressure, but are often empty for various reasons. For example, in multi-family homes in areas with low water pressure, if the entire lower-level home opens at once, the top-floor home may be suddenly depleted and may easily experience this empty water pipe phenomenon.

At this time, the empty water pipes generate strong vacuum pressure and draw back the water in the toilet tank, which is filled up near the fill valve. This means wasteful consumption of household water. If this phenomenon occurs frequently in a housing complex with many households, the consumption cannot be ignored.

Therefore, all recent tank-type toilets have been mandatory to install a backflow prevention structure that prevents backflow of stored water (wash water) in the tank. Representative backflow prevention structure is check valve (one-way valve) type backflow prevention structure using thin donut type flexible packing which has been used for a long time, and relief valve which releases vacuum pressure which causes backflow by introducing external air into the pipeline (Pressure release valve) type backflow prevention structure.

Document (1) introduced below shows a typical check valve type backwash prevention structure using a donut-type flexible packing, and document (2) shows a typical relief valve type wash water backflow using a swing door that performs external air inflow. The prevention structure is shown.

(1) Non-return device for toilet valve of Korea Patent No. 10-1097971 (2) Korean Patent Application Publication No. 10-2012-0041347 Backflow prevention device of fresh water in toilet bowl and toilet body

The technical idea of the present invention is found to be basically similar to the structure in which the documents (1) and (2) introduced above are appropriately combined. However, the true object of the present invention is not the simple combination of documents (1) and (2), but rather by the organic combination between the structure in which document (1) is interpreted differently and the structure in which document (2) is improved ( It is to induce a remarkably developed technical effect that can never be achieved by the single or simple combination of 1) and (2).

First, the fill valve backflow prevention device of document (1) will be described. Literature (1) shows that when the backflow of the storage water supplied into the tank occurs, the donut-shaped flexible packing is retracted by the back pressure of the storage water flowing back from the tank side to the water pipe, and the packing (backflow prevention piece) is firmly in the recessed groove of the operation control member. It can be seen that the configuration is in close contact. In addition, it can be seen that as an auxiliary configuration, a structure for limiting the deformation range up and down of the non-return packing is added so that the packing does not overturn due to excessive opening. This strain limiting structure may be used to block foreign substances such as stones coming from the water pipe, but most of all, the packing gap is accumulated by high pressure water every time the fill valve is opened. It is for.

However, there is a disadvantage in that the flow resistance of the high-pressure water flowing into the tank through the fill valve due to the packing deformation limitation structure. This leads to a decrease in the supply water pressure and the supply flow rate, and also adversely affects the use of the high pressure water inlet as a supplementary water for rim drainage or jet drainage without going through a tank.

In addition, the configuration as in literature (1) acts as a significant obstacle when attempting to release the vacuum pressure in the water pipe by inducing the inflow of external air, as in the following document (2), because the backflow prevention packing at the same time There is a disadvantage in that it is difficult to substantially introduce air into the water pipe since it reaches a state that is already closely adhered to. At this time, if the excessive vacuum pressure is maintained for a long time there is a fear that the packing and the auxiliary structure around it is loose or broken.

Next, look at the washing water backflow prevention device of the literature (2). Literature (2) has an open air inlet door, which is a sliding door in a space communicating with the outside of one side of the fill valve, is closed by water pressure when the washing water is being supplied from the water pipe, and is kept open when the water pipe is vacuumed. To flow into the high pressure water flow space. This follows the principle of a typical (reverse) relief valve, but in order to close the inlet door quickly during normal conditions, that is, in the process of frequent water supply, it consists of a rigid plate rather than flexible packing. Once it is inflowed, it is difficult to attach it again quickly.) However, this naturally reduces the sealing power of the inlet, which leads to leakage of supply water pressure and supply flow rate in normal normal water supply. Therefore, this also adversely affects the direct use of the incoming high pressure water as a supplement for rim drainage or jet drainage without going through a tank.

 The present invention has been devised to comprehensively solve the problems of the two methods described above.

In order to solve the above-mentioned problems, the present invention first configured all of the packings having a reverse flow prevention function as a flexible packing of a flexible material.

First, the plate-type flexible packing {hereinafter, the air inlet packing 30) is inserted and fixed to the air inlet stopper 13 of the breathable structure installed in the high-pressure water flow space A, but the air inlet stopper 13 and the outside air inlet are fixed. No elastic structure was placed between the packings 30 and was designed to maintain a high degree of hermetic sealing due to the natural adhesion of the flexible packing.

Next, between the high pressure water inlet 11 and the fill valve 20, a donut-type flexible packing (hereinafter referred to as a backflow prevention packing 40) that effectively performs a backflow prevention function in a state where the washing water is filled up and down is inserted and fixed. In the lower space of the backflow prevention packing 40, no deformation limiting structure was provided, and only the upper portion was provided with a deformation inducing structure by the diaphragm support ring or the deformation guide ring 24.

In this case, the deformation guide ring 24 may be the diaphragm support ring itself, or may be a separate component. In the present invention, the strain guide ring 24, which serves as a diaphragm support ring itself as an optimal embodiment, is described, but the design point of the strain guide ring intended by the present invention is not a top shape for supporting the diaphragm, but a reverse flow. The focus is on the lower shape in contact with the prevention packing 40.

Specifically, the deformation guide ring 24 is designed to intentionally design a deformation guide shape that is a lower shape so that the backflow prevention packing 40 can be rolled into the lower inner surface of the deformation guide ring 24 as needed. Of course, the backflow prevention packing 40 should not be rolled inward when the backflow occurs in a state where the washing water is full (in this case, it should be kept in close contact with the outer surface of the lower portion of the derivation ring), and a strong vacuum pressure is provided in the high pressure water inlet. It is necessary to adjust each part shape (induction angle, packing outer diameter, guide ring inner diameter, etc.) appropriately so that the backflow prevention packing 40 may be folded and rolled into the deformation guide ring 24 only in a constantly maintained situation.

Based on the above structure will be described by dividing the core operation of the present invention into two situations. First, under normal washing water supply conditions, since the air inflow packing 30 maintains a high level of closeness (closed state), the high pressure water flow space A in which the high pressure water outlet 12 is provided is full of washing water. Is maintained, there is no high-pressure water fine leakage toward the outside air inlet stopper 13, there is no loss of the inlet pressure and a good inlet water pressure is maintained.

In this state, the countercurrent pulsation pressure is generated in the high-pressure water pipe in a relatively short moment, and the pressure difference is also relatively small, so that even if the backflow prevention packing 40 of the present invention maintains a proper backflow prevention structure in a suitable state, (I.e., the sealed state of the external air inflow packing 30 is generally not lost, and only the backflow prevention packing 40 can perform most of the backflow prevention function.)

On the other hand, when strong and natural high-pressure water inflow is performed without pulsating pressure, the backflow prevention packing 40 is flipped downward without any deformation limiting structure, thereby minimizing the inflow resistance of the wash water. If such normal operation condition accumulates for a long time, the elasticity and flexibility of the backflow prevention packing may be inferior, resulting in a deterioration of the initial adhesion state (a close contact between the deformation guide ring and the backflow prevention packing). Since 30 is still present, the number of times of operation of the air inflow packing 30 becomes relatively frequent, and the minimum backflow prevention function is still performed throughout the balltap.

Second, look at the situation in which the abnormal vacuum pressure occurred in the high pressure water flow space (A) when the washing water is exhausted. When a strong vacuum pressure is generated from the high-pressure water inlet 11 side, the external air inflow packing 30 quickly retreats to the high-pressure water flow space A without any elastic support member, and at the same time, even the shape of the packing body due to the flexibility of the flexible packing. As it deforms in the retraction direction, it exhibits extremely fast inflow response. In this process, the edge portion of the backflow prevention packing 40 located on the passage for delivering the outside air (outside air) to the high-pressure water inlet side is made with a small force (vacuum pressure) by the intentional lower shape of the deformation guide ring 24. It is easily rolled into the deformation guide ring to quickly secure an inflow path. Of course, part of the backflow prevention packing 40 that is rolled inward can be easily recovered at the next toilet use.

At this time, the external air inflow packing 30 separated from the outdoor air inlet stopper 13 may also have some leakage and water pressure decrease during the normal next washing water inflow process, but also after the use of one toilet bowl, the next washing water inflow process may have a unique adhesive force. It is already sealed. Therefore, the user can feel the satisfaction of high washing water pressure with a comfortable washing water inflow feeling as if there is no air inflow packing 30.

The present invention based on the above-described core action, by maximizing the advantages while minimizing the disadvantages specific to the flexible packing through the two-stage sequential arrangement of the flexible packing has the following improved effects.

First, the external air inflow packing 30 is designed to focus on two requirements, such as securing the sealability in the normal operation situation and responsiveness in the external air inflow situation, so that the unnecessary high pressure leakage is minimized when the usual washing water is introduced. The water can be used in various ways without reducing the pressure, and even after performing the air inflow function (vacuum release function), it is possible to quickly reach a highly sealed state by one or two washing water inflow operations.

Next, since the backflow prevention packing 40 is designed to focus on deformation flexibility without being largely bound to its sealing force, it minimizes water pressure reduction due to resistance when washing water is normally introduced, so that the high-pressure water flowing into the It can be used in various ways, such as supplemental water, and even when a vacuum pressure is generated, it is easily deformed inwards, thereby quickly introducing air. (Similarly, even after performing the inflow function, it is possible to quickly reach a steady state by one or two washing water inflow operations.)

In addition, the manual restoration handle 31 long connected to the external air inflow packing 30 not only easily readjusts the initial position of the external air inflow packing 30, but also allows the user to easily examine the height and the operating state of the restoration handle. Since there is an advantage that can easily grasp the residual adhesion (life) with the operating state of the backflow prevention packing 40 located invisible.

Lastly, the two flexible packings 30 and 40 may have incomplete adhesion (or backflow prevention function) or a shortened life in a state in which each of the two flexible packings 30 and 40 operates alone. In this situation, the overall packing (or backflow prevention function) can be excellently maintained in such a way that the other packing compensates for the fact that one packing is not restored. Therefore, due to the cooperative action of the two packings, the toilet users may not feel the discomfort of leaking water pressure, and may feel the comfortable washing water inflow feeling as if the toilet is completely removed from the prevention of backflow and inflow. Therefore, it provides the basis for the optimal design to achieve the ideal balance between product quality and service life.

1 is an overall exploded view of a ball tap equipped with the present invention
Figure 2 is an overall cross-sectional view of the ball tap mounted on the present invention
Figure 3 is an exploded view of the cut state of the present invention backflow prevention device
Figure 4 is a cutaway state cross-sectional view of the present invention backflow prevention device
5 is a cross-sectional view showing the operation of each packing in a state in which the washing water is filled in the high-pressure water flow space
6 is a cross-sectional view showing the operation of each packing in a state in which the washing water is empty in the high pressure water flow space;

Since most of the technical features of the present invention have been described in the above-mentioned problem solving means, the following description will be given in a direction supported by the above description based on the embodiments included in the drawings.

The following description can be fully understood by those skilled in the art by the drawings, and even if there is a part missing from the description supporting the drawings. In addition, the components represented by the specific terminology in the description of the embodiments and their coupling structures do not limit the technical spirit inherent in the present disclosure.

1 and 2 show the ball tap device in which the present invention is mounted as a whole. 3 and 4 are shown in a cutaway state for easy understanding of the backflow prevention device portion of the present invention.

The present invention will be described with reference to FIGS. 1 to 4 collectively.

First, the ball tap device as a whole, the pressure reducing valve 15 and the strainer 14 is located in the inlet from the building water pipe, the high-pressure water inlet 11 is located thereon, the high-pressure water flow around the high-pressure water inlet (A) Is formed. The high-pressure water flow space (A) is a space in which the inflow and outflow of the washing water is actively performed, and is also a place where air passes in the inflow situation described below.

A fill valve (meaning a combination of reference numerals 21 to 24) is seated above the high pressure water flow space A, and specifically, the diaphragm 23 of the fill valve is arranged to open or close the high pressure water inlet 11. do.

When the float 16 transmits the change of the tank level to the ball tap operating arm 10, the ball tap operating arm 10 transmits the change to the pressure chamber plug 21 to discharge or charge the pressure water of the fill valve 20.

The pilot action of the pressure water actuates the diaphragm 23 coupled to the pressure water valve body 22. The inflow path where the high-pressure pressure water rises again is sufficient with a small gap between the slender rod in the pressure chamber plug 21 and the pressure water valve body 22.

The high pressure water introduced through the operation of the fill valve is a state in which the water pressure is somewhat lowered, but is supplied to the supplemental water outlet 17 and the tank storage water supply port 18 through the high pressure water outlet 12 in this state.

In the present invention, the deformation guide ring 24, which is a key component, is made of a diaphragm support ring and one body, but may be interpreted as if it is a diaphragm support ring. It can be designed as separate parts. For example, if the diaphragm support ring is a simple plastic, the lower inner surface shape of the lower shape of the deformation guide ring 24 may be made of a smooth material, and the lower outer surface shape may be formed of a rather sticky material. This is also an important design point for adjusting the simple adhesion and roll-up characteristics of the backflow prevention packing 40 which will be described further below.

The outside air inlet stopper 13 for introducing outside air (external air) is installed to be connected to the high-pressure water flow space (A), where the outside air inlet packing 30 of the dish-shaped packing is inserted and fixed, deformed or exercised. While performing the inflow function.

At this time, between the outside air inlet packing 30 and the outside air inlet stopper 13 is configured so that no elasticity or load acts, and the working rod of the outside air inlet packing 30 is provided with a projection to a predetermined depth or more. Stopping without entering, and the outside of the projection is provided with a restoring knob 31 which protrudes outwardly to the outside of the air inlet stopper 13 to allow the packing to be taken out again in the air inflow process.

On the other hand, the donut-shaped flexible packing backflow prevention packing 40 is also one side is in contact with the high-pressure water flow space (A) and the other side of the deformation guide ring for supporting the diaphragm (23) or the diaphragm ( It is installed to be connected to 24) and performs the function of washing water inflow or washing water backflow blocking or external air inflow while deforming.

5 is a cross-sectional view showing the operation of each packing in a state in which the washing water is filled in the high-pressure water flow space. Fig. 5A is a normal state, and Fig. 5B is a state which is prevented when the backflow is short and weakly generated. (Most spaces in the pipeline shown in the figure are filled with water.) Figs. 5A and B are usually during toilet operation (wash water supply state). In this case, the reverse flow generated at this time may be a small pulsating pressure if the time is short, and the backflow prevention packing 40 may be sufficiently prevented by just contacting the lower outer surface of the deformation induction ring 24. Therefore, as shown in FIG. 5B, the outside air inflow packing 30 is slightly deformed while the edge is slightly deformed while maintaining the overall attachment state to the outside air inlet stopper, and does not release the entire water pressure of the high-pressure water flow space at a time.

6 is a cross-sectional view showing the operation of each packing in a state where the washing water is empty in the high pressure water flow space. In this state, the situation of FIG. 5 is deteriorated and the washing water of the high pressure water pipe is rapidly drawn off, or the vacuum pressure is generated in the high pressure water pipe in the standby state where the toilet is not in use. FIG. 6A shows a standby state, and FIG. 6B shows a state in which water filled in the high pressure water pipe is drained. Referring to FIG. 6B, the outdoor air inflow packing 30 rapidly retracts without disturbing any elastic support and rapidly introduces external air into the gap between the packing border and the inner circumferential surface of the air inflow pipe, and the backflow prevention packing 40 has a deformation guide ring. (24) Secure the proper air inflow path by rolling along the lower inner surface. 6, the packing state is restored to normal within one or two times of washing water operation, and when the user pulls the restoration knob 31 in advance, it may function normally immediately from the next washing water supply.

As can be seen intuitively from the figure, when explaining the deformation characteristics of the backflow prevention packing 40, the upper (fill valve diaphragm side) is deformed along the lower shape of the deformation induction ring 24, the lower (high-pressure water flow space) Side) is installed to be freely deformed by the inlet water pressure without any deformation restriction structure.

More specifically, the lower shape of the deformation guide ring 24 in which the backflow prevention packing 40 slides in close contact with each other is formed in a two-stage structure of the lower inner side surface and the lower outer side surface which are bent at different angles based on the vertical direction. Thus, the backflow prevention packing 40 is formed to be simply in close contact with the lower outer surface or to be rolled up along the lower inner surface according to the state of filling the washing water in the high-pressure water flow space (A). At this time, the angle and the surface friction of the lower outer surface and the lower inner surface, and the radius of the bent portion to separate the ratio of both can be optimized through many experiments, but basically follows the technical idea of the present invention.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

In other words, one of ordinary skill in the art to which the present invention pertains may utilize a technical idea implied by the present invention to implement a simple change or simple extension case, which is not included in the specification and drawings as necessary. It is also clearly included in the scope of the technical idea of the present invention expressed by the following claims.

The present invention can be used very effectively in a general natural drainage toilet using a large capacity water tank, as well as a partial forced drainage toilet using both a small capacity water tank and the direct water of a high pressure water pipe.

10: ball tap operating arm
11: high pressure water inlet
12: high pressure water outlet
A: high pressure water flow space
13: outside inlet stopper
14: sieve
15: pressure reducing valve
16: float
17: make-up water outlet
18: Tank reservoir supply port
20: Fill Valve
21: pressure seal
22: pressure water valve body (pilot cylinder)
23: diaphragm
24: deformation guide ring (or diaphragm support ring)
30: Inflow packing (= plate type flexible packing)
31: Restoration Handle (of Inflow Packing)
40: Backflow prevention packing (= donut type flexible packing)
41: retaining ring (for non-return packing)

Claims (5)

delete Tank storage water backflow prevention of the toilet having a fill valve 20 for supplying the washing water to the toilet tank through the high pressure water outlet 12 connected to the high pressure water flow space A by receiving the washing water from the high pressure water inlet 11 In the device,
An outside air inlet stopper 13 installed to be connected to the high pressure water flow space A to introduce outside air (outside air);
Is inserted into and fixed to the outside air inlet stopper 13, the external air inlet packing 30 of the dish-shaped packing shape to perform the outside air inlet function while deforming or movement; And
One side is disposed to contact the high-pressure water flow space (A) and the other side is installed to be connected to the diaphragm (23) or the deformation guide ring (24) supporting the diaphragm (23), deformed according to water pressure Tank storage water backflow prevention device of the toilet further comprises a; donut-type flexible packing-shaped backflow prevention packing (40) to perform the inflow or washing water backflow blocker or the outside air inlet function. 3. The method of claim 2,
Between the outside air inlet packing 30 and the outside air inlet stopper 13 is configured so that no elasticity or load is applied,
The outside air inlet packing (30) is a tank storage water backflow prevention device of the toilet characterized in that the restraint handle 31 is further formed to protrude outwardly the outside air inlet stopper (13). The method of claim 3,
The backflow prevention packing 40 is deformed along the lower shape of the deformation induction ring 24 upwards, and downwards is installed so as to be freely deformed by the washing water inlet pressure without any deformation restriction structure. Tank storage backflow prevention device. 5. The method of claim 4,
The lower shape of the deformation induction ring 24 is formed in a two-stage structure of the lower inner surface and the lower outer surface bent at different angles based on the vertical direction, depending on the state of washing water filling in the high-pressure water flow space (A) The backflow prevention packing 40 is a tank storage water backflow prevention device of the toilet characterized in that it is formed so as to be simply in close contact with the lower outer surface or rolled along the lower inner surface.

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