WO2011140969A1

WO2011140969A1 - Backflow preventer

Info

Publication number: WO2011140969A1
Application number: PCT/CN2011/073879
Authority: WO
Inventors: 周华松; 刘梓光; 陈添育; 熊洪煌
Original assignee: 厦门松霖科技有限公司
Priority date: 2010-05-14
Filing date: 2011-05-10
Publication date: 2011-11-17

Abstract

A backflow preventer used in bath field comprises a base (100) and an elastic sealing element (200). The base (100) is provided with a waterway (140), a fixing seat (120) arranged in the waterway (140) and at least one spoke (130) for fixedly connecting the fixing seat (120) in the waterway (140). A passage is formed between the spokes (130). The elastic sealing element (200) is provided with an elastic sealing sheet (210) and a fixing portion (220) arranged on the front of the elastic sealing sheet (210). The fixing portion (220) is fixedly connected to the fixing seat (120). The elastic sealing piece (210) matches with the waterway (140), wherein the elastic sealing sheet (210) opens the passage under a forward flow impact action if the flow in the waterway (140) is forward; the elastic sealing sheet (210) closes the passage under a backflow impact action if the flow in the waterway (140) is backward. The backflow preventer is adapted to be used in a shower or a tap in bath field and has advantages of high practicality, few components and low cost.

Description

[Name of invention established by ISA in accordance with Rule 37.2] Backflow prevention mechanism

Technical field

The present invention relates to an anti-backflow mechanism for use in the bathing field.

Background technique

The existing anti-backflow mechanism, such as ZL200720008772.5 disclosed in the Chinese patent database. The anti-backflow mechanism comprises a base body, a spring and a seal. The matrix is formed as a waterway. The seal is connected within the waterway by a spring. When the waterway is downstream, the water pressure is acting on the seal, so that the spring is compressed, so that the waterway is turned on; when the waterway is reversed, the water pressure acts on the seal, and the spring force acts on the seal to seal the waterway. . The existing anti-backflow mechanism has the following disadvantages: 1. Many parts, high cost, inconvenient assembly; 2. Large occupied space, not suitable for the water outlet terminal in the shower field, such as shower or faucet, no practicality.

Summary of the invention

The present invention provides an anti-backflow mechanism for use in the bathing field, which overcomes the deficiencies of the water outlet terminal that cannot be applied to the bathing field in the backflow prevention mechanism of the prior art.

The technical solution adopted by the present invention to solve the technical problems thereof is:

Used in the anti-backflow mechanism in the bathing area, it includes:

a substrate having a waterway, a fixed seat located within the waterway, and at least one spoke securing the fixed seat within the waterway, wherein the spokes form a passage therebetween; and

An elastic sealing member having an elastic sealing piece and a fixing portion disposed on the front surface of the elastic sealing piece, the fixing portion is fixed to the fixing seat, and the elastic sealing piece is adapted to the water path, wherein: the water flow is flowing downstream, The elastic sealing piece is subjected to a forward flow impact to conduct a passage; when the water flow is reversed, the elastic sealing piece is subjected to a backflow impact to seal the passage.

In a preferred embodiment:

a fixed perforation is provided in the fixing seat;

The fixing portion has a fitting portion fixed to the front surface of the elastic sealing sheet, a locking portion fixed to the fitting portion, and a guiding portion fixed to the engaging portion, and the fixing portion passes through the through hole. Moreover, the fitting section and the through hole are adapted to be coupled together, and the sectional area of the engaging section is larger than the cross-sectional area of the through hole.

In a preferred embodiment:

a fixing shaft is convexly arranged on the back surface of the fixing seat;

The fixing portion is provided as a set of holes, and the sleeve holes are tightly sleeved on the fixed shaft.

In a preferred embodiment, the elastic sealing sheet comprises a basic section and a V-shaped section extending outward from the periphery of the basic section, the V-shaped section opening facing the forward direction.

In a preferred embodiment, the V-shaped section includes an inclined section extending from the periphery of the basic section toward the back and a gripping section extending outwardly from the inclined section.

In a preferred embodiment, the outer peripheral portion of the elastic sealing sheet is bent toward the back.

In a preferred embodiment, the outer peripheral portion of the front surface of the elastic sealing sheet is chamfered.

In a preferred embodiment, the base body includes a kit, and the inner hole of the kit is the water passage; the spoke annular array is fixed between the kit and the mount.

In a preferred embodiment, the inner hole of the kit is a stepped hole, and the sealing sheet faces the stepped surface of the stepped hole.

In a preferred embodiment, the step surface is provided as an inclined surface.

Compared with the background art, the technical solution has the following advantages:

1. Apply the deformation function of the elastic seal to the waterway. When the water flow is downstream, the elastic seal is positively deformed by the forward impact to open the passage. When the water flow is reversed, the elastic seal is reversed or reversed by the backflow impact. The deformation to seal the passage overcomes the deficiencies of the prior art, and the elastic sealing sheet occupies a small space, and can be applied to a shower head or a faucet in the bathing field, has high practicability, few parts, and reduces cost;

2. The fixing joint comprises an adapting section, a snapping section and a guiding section, and combining the elastic property of the sealing member to fix the fixing joint on the fixing seat, and can strengthen the fixing between the fixing seat and the fixing part;

3. There are a plurality of spokes arranged in a ring shape, and the sealing sheet is reliably above the spokes when sealing, which can enhance the sealing performance and prevent the reverse deformation from being too large, and the greater the water pressure, the stronger the sealing performance;

4. The elastic sealing piece comprises a basic section and a V-shaped section, and the V-shaped section opening faces forward, and the deformation performance of the V-shaped section can enhance the sealing performance;

5. The outer peripheral portion of the elastic sealing sheet is bent toward the back to enhance the deformation coefficient and enhance the sealing performance;

6. The outer side of the front side of the elastic sealing piece is chamfered to enhance the deformation coefficient and enhance the sealing performance;

7. The inner hole of the kit is a stepped hole, and the front surface of the sealing piece faces the stepped surface of the stepped hole, and the sealing performance is strong.

DRAWINGS

The invention will now be further described with reference to the accompanying drawings and embodiments.

1 is a perspective exploded view of the anti-backflow mechanism of the first embodiment.

2 is a schematic perspective cross-sectional view of the anti-backflow mechanism of the first embodiment, in which the waterway is downstream.

3 is a schematic cross-sectional view of the anti-backflow mechanism of the first embodiment, in which the waterway is downstream.

4 is a schematic perspective cross-sectional view of the anti-backflow mechanism of the first embodiment, in which the water path is reversed.

Fig. 5 is a schematic cross-sectional view showing the backflow prevention mechanism of the first embodiment, in which the water passage is reversed.

6 is a schematic cross-sectional view of the anti-backflow mechanism of the second embodiment.

Fig. 7 is a schematic cross-sectional view showing the backflow prevention mechanism of the third embodiment.

Fig. 8 is a schematic cross-sectional view showing the backflow prevention mechanism of the fourth embodiment.

9 is a schematic cross-sectional view of the anti-backflow mechanism of the fifth embodiment.

Fig. 10 is a schematic cross-sectional view showing the backflow prevention mechanism of the sixth embodiment.

detailed description

Embodiment 1. Referring to Figures 1 through 5, an anti-backflow mechanism for use in the bathing field includes a base 100 and an elastomeric seal 200.

The base 100 includes a kit 110, a mounting base 120 and a plurality of spokes 130. The inner hole of the sleeve 110 is formed as a water path 140. In the embodiment, the inner hole is a stepped hole, and the stepped surface 141 of the stepped hole may be a flat surface or an inclined surface. The mount 120 is located in the waterway 140 and is secured within the waterway 140 by a plurality of spokes 130. The spokes 130 are annularly arrayed, and a path is formed between each of the two spokes 130 that are spaced apart. A uniform through hole 121 is defined in the fixing base 120. Preferably, the sleeve 110 is recessed with an annular groove 111, and an O-ring 112 is connected to the annular groove 111.

The elastic sealing member 200 is integrally formed and has an elastic sealing piece 210 and a fixing portion 220 provided on the front surface of the elastic sealing piece 210. The fixing portion 220 has a fitting portion 221 fixed to the front surface of the elastic sealing sheet 200, a locking portion 222 fixed to the fitting portion, and a guiding portion 223 fixed to the engaging portion, the guiding portion Preferably, an inclined guide surface is provided above for assembly. The outer peripheral portion of the front surface of the elastic sealing sheet 210 is chamfered 211.

The fixing portion 220 of the elastic sealing member 200 passes through the through hole 121 of the fixing base 120 of the base 100, and the fitting portion 221 and the through hole 121 are fitted together, and the sectional area of the engaging portion 222 is larger than The cross-sectional area of the through hole 121 is locked to the front surface of the fixing base 120. The sealing sheet 210 faces the step surface 141 of the stepped hole of the base 100.

Referring to FIG. 2 and FIG. 3, when the water channel 140 flows downstream, the elastic sealing sheet 210 is positively deformed by the forward impact to conduct the passage, and the water passage 140 is turned on;

Referring to FIG. 4 and FIG. 5, when the water flow 140 flows back, the elastic sealing piece 210 is reversed or reversely deformed by the backflow impact to press against the back surface of the spoke 130 and the step surface 141 to seal the passage, and the water passage 140 is sealed at this time.

Example 2. It differs from the first embodiment in that, referring to FIG. 6, the outer peripheral portion of the elastic sealing sheet 210 is bent toward the back.

Example 3. It differs from the first embodiment in that, referring to FIG. 7, the elastic sealing piece 210 includes a basic section 212, an inclined section 213 extending from the periphery of the basic section 212 toward the back, and a positive section from the inclined section. An outwardly extending gripping section 214, the angled section 213 and the gripping section 214 cooperate to form a V-shaped section, the V-shaped section opening facing the forward direction.

Example four. Referring to Figure 8, an anti-backflow mechanism for use in the bathing field includes a base 100 and an elastomeric seal 200.

The base 100 includes a kit 110, a mounting base 120 and a plurality of spokes 130. The inner hole of the sleeve 110 is formed as a water path 140. In the embodiment, the inner hole is a stepped hole, and the stepped surface 141 of the stepped hole may be a flat surface or an inclined surface. The mount 120 is located in the waterway 140 and is secured within the waterway 140 by a plurality of spokes 130. The spokes 130 are annularly arrayed, and each of the two spokes 130 spaced apart is formed as a passage. A fixing shaft 122 is protruded from the back of the fixing base 120. Preferably, the sleeve 110 is recessed with an annular groove 111, and an O-ring 112 is connected to the annular groove 111.

The elastic sealing member 200 is integrally formed and has an elastic sealing piece 210 and a fixing portion 220 provided on the front surface of the elastic sealing piece 210. The fixing portion 220 is formed as a socket hole. The outer peripheral portion of the front surface of the elastic sealing sheet 210 is chamfered 211.

The sleeve hole of the elastic sealing member 200 is tightly sleeved on the fixing shaft 122 of the fixing base 120 of the base body 100. The sealing sheet 210 faces the step surface 141 of the stepped hole of the base 100.

When the water flow 140 flows downstream, the elastic sealing piece 210 is forwardly deformed by the forward impact to conduct the passage, and the water passage 140 is turned on; when the water flow 140 flows backward, the elastic sealing piece 210 is reversed or reversely deformed by the reverse flow impact. The passage is pressed against the back surface of the spoke 130 and the step surface 141 to seal the passage, at which time the water passage 140 is sealed.

Example 5. It differs from the fourth embodiment in that, referring to FIG. 9, the outer peripheral portion of the elastic sealing sheet 210 is bent toward the back.

Example 6. It differs from the fourth embodiment in that, referring to FIG. 10, the elastic sealing piece 210 includes a basic section 212, an inclined section 213 extending from the periphery of the basic section 212 toward the back outward, and a tilting section to the positive direction. An outwardly extending gripping section 214, the angled section 213 and the gripping section 214 cooperate to form a V-shaped section, the V-shaped section opening facing the forward direction.

The above is only the preferred embodiment of the present invention, and thus the scope of the present invention is not limited thereto, that is, equivalent changes and modifications made in accordance with the scope of the invention and the contents of the specification should still be covered by the present invention. Within the scope.

Industrial applicability

The anti-backflow mechanism used in the bathing field has a water flow downstream, and the elastic sealing piece is subjected to a forward flow impact to conduct a passage; when the water flow is reversed, the elastic sealing piece is subjected to a backflow impact to seal the passage. The invention can be applied to a shower head or a faucet in the bathing field, and has good industrial applicability.

Claims

An anti-backflow mechanism for use in the bathing area is characterized in that it comprises:

a substrate having a waterway, a fixed seat located within the waterway, and at least one spoke securing the fixed seat within the waterway, wherein the spokes form a passage therebetween; and

An elastic sealing member having an elastic sealing piece and a fixing portion disposed on the front surface of the elastic sealing piece, the fixing portion is fixed to the fixing seat, and the elastic sealing piece is adapted to the water path, wherein: the water flow is flowing downstream, The elastic sealing piece is subjected to a forward flow impact to conduct a passage; when the water flow is reversed, the elastic sealing piece is subjected to a backflow impact to seal the passage.
The anti-backflow mechanism for use in the bathing field according to claim 1, wherein:

a fixed perforation is provided in the fixing seat;

The fixing portion has an fitting section fixed to the front surface of the elastic sealing piece, and is fixedly attached

a fastening portion of the matching portion, a guiding portion fixed to the engaging portion, the fixing portion passes through the through hole, and the fitting portion and the through hole are adapted to be coupled together, and the sectional area of the engaging portion It is larger than the cross-sectional area of the through hole.
The anti-backflow mechanism for use in the bathing field according to claim 1, wherein:

a fixing shaft is convexly arranged on the back surface of the fixing seat;

The fixing portion is provided as a set of holes, and the sleeve holes are tightly sleeved on the fixed shaft.
The anti-backflow mechanism for use in the bathing field according to claim 1 or 2 or 3, wherein the elastic sealing piece comprises a basic section and a V-shaped section extending outward from the peripheral edge of the basic section. The V-shaped segment opening faces in the forward direction.
The anti-backflow mechanism for use in the bathing field according to claim 4, wherein said V-shaped section comprises an inclined section extending from the peripheral edge of the basic section toward the outside, and a forward direction outwardly from the inclined section. Extended grip section.
The anti-backflow mechanism for use in the bathing field according to claim 1 or 2 or 3, wherein the outer peripheral portion of the elastic sealing sheet is bent toward the back.
The anti-backflow mechanism for use in the bathing field according to claim 1 or 2 or 3, wherein the outer peripheral portion of the front surface of the elastic sealing sheet is chamfered.
The anti-backflow mechanism for use in the bathing field according to claim 1 or 2 or 3, wherein the base body comprises a kit, the inner hole of the kit is the water passage; and the spoke annular array is fixed Between the kit and the mount.
The anti-backflow mechanism for use in the bathing field according to claim 8, wherein the inner hole of the kit is a stepped hole, and the front surface of the sealing sheet faces the stepped surface of the stepped hole.
The anti-backflow mechanism for use in the bathing field according to claim 9, wherein the step surface is provided as an inclined surface.