CN211820884U - Non-pressure loss backflow preventer - Google Patents
Non-pressure loss backflow preventer Download PDFInfo
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- CN211820884U CN211820884U CN201922095707.6U CN201922095707U CN211820884U CN 211820884 U CN211820884 U CN 211820884U CN 201922095707 U CN201922095707 U CN 201922095707U CN 211820884 U CN211820884 U CN 211820884U
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Abstract
The utility model provides a non-pressure loss backflow preventer, it includes the valve body, the both sides of valve body are provided with upper reaches gate valve, low reaches gate valve respectively, install water inlet check valve, play water check valve in proper order in the valve body, be first pressure chamber between upper reaches gate valve and the water inlet check valve, be the second pressure chamber between water inlet check valve and the play water check valve, be the third pressure chamber between play water check valve and the low reaches gate valve, the second pressure chamber is equipped with the sluicing valve part, the exit of first pressure chamber is equipped with water inlet check valve clack, water inlet check valve clack is connected in valve clack installation arm, water inlet check valve clack installation arm is connected in the first pivot of installing; the outlet of second pressure chamber is equipped with out the water check valve clack, goes out the water check valve clack and connects in a water check valve clack installation arm, goes out the water check valve clack installation arm and connects in the second pivot of installing at the valve body, and first pivot, second pivot all are equipped with the spring. The product can prevent the fluid medium from flowing backwards and reduce the pressure loss.
Description
Technical Field
The utility model relates to a pump valve technical field especially relates to a non-pressure loss backflow preventer.
Background
The backflow preventer is one device comprising non-return parts and capable of preventing water from flowing backwards in water supply pipeline. The great drawback of fluid through check valve back pressure loss exists in traditional backflow preventer, the utility model aims at providing a non-pressure loss backflow preventer.
The backflow preventer is provided with three pressure cavities, each pressure cavity is required to be provided with a detection port, and whether the backflow preventer is in a normal working state or not is judged by detecting the pressure value of each pressure cavity.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a non-pressure loss backflow preventer, it can prevent fluid medium refluence, also enables pressure loss less.
The utility model provides a non-pressure loss backflow preventer, which comprises a valve body, wherein an upstream gate valve (2) and a downstream gate valve (8) are respectively arranged at two sides of the valve body, a water inlet check valve and a water outlet check valve are sequentially arranged in the valve body, a first pressure cavity is arranged between the upstream gate valve and the water inlet check valve, a second pressure cavity is arranged between the water inlet check valve and the water outlet check valve, a third pressure cavity is arranged between the water outlet check valve and the downstream gate valve, the first pressure cavity, the second pressure cavity and the third pressure cavity are respectively provided with a first pressure measuring hole, a second pressure measuring hole and a third pressure measuring hole, a water drain valve component is arranged at the lower part of the second pressure cavity,
the water inlet check valve clack is arranged at an outlet of the first pressure cavity, the water inlet check valve clack is connected to a water inlet check valve clack mounting arm, the water inlet check valve clack mounting arm is connected to a first rotating shaft mounted on the side wall of the second pressure cavity, and the first rotating shaft is provided with a first spring for keeping the water inlet check valve clack in a normally closed state;
the exit of second pressure chamber is provided with out water check valve clack, it connects in a water check valve clack installation arm to go out water check valve clack, a water check valve clack installation arm is connected in the second pivot of installing at the third pressure chamber lateral wall, the second pivot is provided with the second spring that keeps out water check valve clack in normally closed state.
Compared with the prior art, the utility model provides a non-pressure loss backflow preventer can prevent fluid medium refluence, and the pressure loss that can also be is less.
Further, an upstream gate valve pressure measuring hole (1) is arranged at the input end of the upstream gate valve.
Further, the valve body between the upstream gate valve and the downstream gate valve includes: the valve comprises a front-section valve body and a rear-section valve body detachably connected to the front-section valve body;
the front-section valve body is provided with a first front valve body part and a first rear valve body part communicated with the inner cavity of the first front valve body part, and the volume of the inner cavity of the first front valve body part is smaller than that of the inner cavity of the first rear valve body part;
the rear section valve body is provided with a second front valve body part and a second rear valve body part communicated with the inner cavity of the second front valve body part, and the volume of the inner cavity of the second front valve body part is smaller than that of the inner cavity of the second rear valve body part.
Further, the length of the first forward valve body portion is less than the length of the first aft valve body portion;
the length of the second front valve body portion is less than the length of the second rear valve body portion.
Further, a cylindrical inner cavity is formed in the first front valve body, and a water inlet check valve seat is arranged at an outlet of the cylindrical inner cavity of the first front valve body;
the second front valve body part is formed with a cylindrical inner cavity, and a water outlet check valve seat is arranged in the cylindrical inner cavity of the second front valve body part.
Further, first back valve body portion horizontal installation has the first pivot of arranging perpendicularly with the fluid flow direction, the drive torsional spring is installed to first pivot, first pivot is connected with the check valve installation arm of intaking, the check valve installation arm of intaking is connected in the check valve clack of intaking.
Further, valve body portion horizontal installation has the second pivot of arranging perpendicularly with the fluid flow direction behind the second, the drive torsional spring is installed in the second pivot, the second pivot is connected with water outlet check valve installation arm, water outlet check valve installation arm is connected in water outlet check valve clack.
Further, the check valve clack of intaking has the arc lamella body, and the arc lamella body of the check valve clack of intaking has the first circumferential direction bellying that leans on in the check valve clack of intaking, first circumferential direction bellying is provided with the check valve sealing pair of intaking, and the afterbody of the arc lamella of the check valve clack of intaking is provided with first connection afterbody.
Furthermore, the water outlet check valve clack is provided with an arc clack body, the arc clack body of the water outlet check valve clack is provided with a second circumferential protruding portion abutted against the water outlet check valve clack, the second circumferential protruding portion is provided with a water outlet check valve sealing pair, and the tail of the arc clack body of the water outlet check valve clack is provided with a second connecting tail.
Drawings
Fig. 1 is a sectional view of the non-pressure-loss backflow preventer, which is in a closed state.
Fig. 2 is a sectional view of the non-pressure-loss backflow preventer, which is in an open state.
Detailed Description
The present invention will now be described in more detail with reference to the drawings, in which preferred embodiments of the invention are shown, it being understood that one skilled in the art could modify the invention herein described while still achieving the beneficial effects of the invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.
As shown in fig. 1, the utility model discloses a non-pressure loss backflow preventer, it includes upper reaches gate valve pressure measurement hole 1, upper reaches gate valve 2, first pressure measurement hole 3, first spring 4, second pressure measurement hole 5, second spring 6, third pressure measurement hole 7, low reaches gate valve 8, the sealed pair 9 of check valve of intaking, intake antrum 10, hourglass fill 11, sluicing valve part 12, the sealed pair 13 of play water check valve, play water cavity 14.
This non-pressure loss backflow preventer includes the valve body, and the valve body both sides are connected with upper reaches gate valve 2 respectively and downstream gate valve 8, and the income water end of upper reaches gate valve 2 is provided with upper reaches gate valve pressure cell 1, installs water inlet check valve and play water check valve in proper order in the valve body, is first pressure chamber between water inlet check valve and the upper reaches gate valve, is the second pressure chamber between water inlet check valve and the play water check valve, goes out water check valve and is the third pressure chamber with the downstream gate valve. The second pressure chamber is an inlet chamber 10 and the third pressure chamber is an outlet chamber 14.
First pressure cell 3 is installed to the cavity lateral wall of first pressure chamber, second pressure cell 5 is installed to the cavity lateral wall of second pressure chamber, third pressure cell 7 is installed to the cavity lateral wall of third pressure chamber, sluicing valve member 12 is installed to second pressure chamber below, sluicing valve member 12 left side is connected with left honeycomb duct, the one end of left honeycomb duct is connected in first pressure chamber, sluicing valve member 12 right side is connected with right honeycomb duct, the one end of right honeycomb duct is connected in the third pressure chamber, water leakage fill 11 is installed to the below at sluicing valve member 12.
Be provided with the check valve disk seat of intaking in the exit of first pressure chamber, the second pressure chamber then is provided with the check valve clack of intaking through the check valve clack installation arm of intaking and intake check valve disk seat complex, the cavity lateral wall horizontal installation of second pressure chamber has the first axis of rotation that links to each other with the check valve clack installation arm of intaking, this first axis of rotation is provided with the first spring 4 that keeps the check valve clack of intaking to be in the normally closed state, this first spring 4 is torsional spring structure, the check valve clack of intaking is provided with the sealed vice 9 of check valve of. Be provided with out water check valve disk seat in the exit of second pressure chamber, the third pressure chamber then is provided with through a water check valve clack installation arm and goes out water check valve disk seat complex play water check valve clack, the cavity lateral wall horizontal installation of third pressure chamber has the second axis of rotation that links to each other with a water check valve clack installation arm, this second axis of rotation is provided with keeps out water check valve clack and is in the second spring 6 of normally closed state, the second spring is torsional spring structure, it is sealed vice 13 to go out water check valve clack to be provided with a water check valve.
As can be seen from fig. 1, the valve body between the upstream gate valve and the downstream gate valve includes: anterior segment valve body, detachably connect in the back end valve body of anterior segment valve body, bolted connection is passed through on the right side of anterior segment valve body in the back end valve body. The front valve body has a first front valve body part and a first back valve body part communicated with the inner cavity of the first front valve body part, wherein the first front valve body part is in a cylindrical shape, the left end part of the first front valve body part is provided with a flange for abutting against an upstream gate valve, the first pressure measuring hole is arranged at the flange at the left side of the first front valve body part, the first back valve body part comprises a first outer extension side wall extending outwards from the right end part of the first front valve body part vertically and a first circumferential enclosing side wall extending towards the right side from the first outer extension side wall, the upper part of the first circumferential enclosing side wall is bulged upwards to form a first back valve body part upper space, the first back valve body upper space is convenient for installing a first rotating shaft, simultaneously, a valve clack installation arm of the water inlet check valve is in a state shown in figure 2 so as to enable the valve clack of the water inlet check valve to be in an opening state, the first circumferential enclosing side wall is provided with, the cavity volume of the first front valve body portion is less than the cavity volume of the first rear valve body portion. Similarly, the rear section valve body has a second front valve body part and a second rear valve body part communicated with the inner cavity of the second front valve body part, wherein the second front valve body part is substantially cylindrical, the left end part of the second front valve body part is provided with a butt flange (the second front valve body part is fixed on the end part of the front section valve body by bolts), the second rear valve body part comprises a second outer extension side wall extending perpendicularly outwards from the right end part of the second front valve body part and a second circumferential enclosing side wall extending towards the right side from the outer extension side wall, the upper part of the second circumferential enclosing side wall is raised upwards to form a second rear valve body part upper space, the second rear valve body upper space is convenient for installing a second rotating shaft, simultaneously, the water outlet check valve clack installation arm is convenient to be in the state shown in figure 2, and the water outlet check valve clack is in an open state, the right end part of the second circumferential enclosing side wall is provided with a first inner extension side wall which, the first inner extending side wall is provided with a cylindrical downstream gate valve butt joint section, the downstream gate valve butt joint section is cylindrical, the downstream gate valve butt joint section is provided with a butt joint flange, and the volume of the inner cavity of the second front valve body part is smaller than that of the inner cavity of the second rear valve body part.
Referring to fig. 1, the first front valve body portion has a length less than a length of the first rear valve body portion, and the second front valve body portion has a length less than a length of the second rear valve body portion.
In this embodiment, first back valve body portion horizontal installation has the first pivot of arranging perpendicularly with the fluid flow direction, first pivot is installed with the drive torsional spring (being first spring), first pivot is connected with the check valve installation arm of intaking, the check valve installation arm of intaking is connected in the check valve clack of intaking, and valve body portion horizontal installation has the second pivot of arranging perpendicularly with the fluid flow direction behind the second, the drive torsional spring (being the second spring) is installed in the second pivot, the second pivot is connected with a water check valve installation arm, a water check valve installation arm is connected in a water check valve clack. The check valve clack of intaking has the arc lamella body, and the arc lamella body of the check valve clack of intaking has the first circumferential direction bellying that leans on in the check valve clack of intaking, first circumferential direction bellying is provided with the check valve of intaking and seals vice, and the afterbody of the arc lamella of the check valve clack of intaking is provided with first connection afterbody, and first connection afterbody becomes the cylinder form, and check valve clack installation arm of intaking is provided with first connection afterbody accommodation hole, and first connection afterbody tight fit is installed in first connection afterbody accommodation hole. The water outlet check valve clack has an arc clack body, and the arc clack body of water outlet check valve clack has the second circumferential bulge who leans on in the water outlet check valve clack, second circumferential bulge is provided with water outlet check valve sealing pair, and the afterbody of the arc clack body of water outlet check valve clack is provided with the second and connects the afterbody, and the second is connected the afterbody and is become the cylinder form, and water outlet check valve clack installation arm is provided with the second and connects afterbody accommodation hole, and the afterbody tight fit is installed in the second and connects the afterbody accommodation hole to the second.
Here water inlet check valve clack installation arm, play water check valve clack installation arm include: the arm head with the rotating shaft mounting hole is arranged on an arc-shaped arm part of the arm head, connected to the linear arm part of the arc-shaped arm part and connected to the arm tail of the linear arm part, and the arm tail is provided with a tight fit mounting hole matched with the connecting tail of the check valve clack.
Fig. 1 shows a closed state of the non-pressure-loss backflow preventer, in which the water inlet check valve and the water outlet check valve are in a closed state.
Fig. 2 shows the open state of the non-pressure-loss backflow preventer, in which the water inlet check valve and the water outlet check valve are in the open state.
The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.
Claims (9)
1. The non-pressure loss backflow preventer comprises a valve body, wherein two sides of the valve body are respectively provided with an upstream gate valve (2) and a downstream gate valve (8), and the non-pressure loss backflow preventer is characterized in that a water inlet check valve and a water outlet check valve are sequentially arranged in the valve body, a first pressure cavity is formed between the upstream gate valve and the water inlet check valve, a second pressure cavity is formed between the water inlet check valve and the water outlet check valve, a third pressure cavity is formed between the water outlet check valve and the downstream gate valve, the first pressure cavity, the second pressure cavity and the third pressure cavity are respectively provided with a first pressure measuring hole, a second pressure measuring hole and a third pressure measuring hole, and a water draining valve component is arranged on the lower portion of the,
the water inlet check valve clack is arranged at an outlet of the first pressure cavity, the water inlet check valve clack is connected to a water inlet check valve clack mounting arm, the water inlet check valve clack mounting arm is connected to a first rotating shaft mounted on the side wall of the second pressure cavity, and the first rotating shaft is provided with a first spring for keeping the water inlet check valve clack in a normally closed state;
the exit of second pressure chamber is provided with out water check valve clack, it connects in a water check valve clack installation arm to go out water check valve clack, a water check valve clack installation arm is connected in the second pivot of installing at the third pressure chamber lateral wall, the second pivot is provided with the second spring that keeps out water check valve clack in normally closed state.
2. Non-loss backflow preventer according to claim 1, wherein the input end of the upstream gate valve is provided with an upstream gate valve pressure tap (1).
3. The non-damage backflow preventer according to claim 1, wherein the valve body between the upstream gate valve and the downstream gate valve comprises: the valve comprises a front-section valve body and a rear-section valve body detachably connected to the front-section valve body;
the front-section valve body is provided with a first front valve body part and a first rear valve body part communicated with the inner cavity of the first front valve body part, and the volume of the inner cavity of the first front valve body part is smaller than that of the inner cavity of the first rear valve body part;
the rear section valve body is provided with a second front valve body part and a second rear valve body part communicated with the inner cavity of the second front valve body part, and the volume of the inner cavity of the second front valve body part is smaller than that of the inner cavity of the second rear valve body part.
4. The non-loss backflow preventer of claim 3, wherein the first front valve body portion has a length less than a length of the first rear valve body portion;
the length of the second front valve body portion is less than the length of the second rear valve body portion.
5. The non-damage backflow preventer of claim 3, wherein the first front valve body is formed with a cylindrical cavity, and a water inlet check valve seat is disposed at an outlet of the cylindrical cavity of the first front valve body;
the second front valve body part is formed with a cylindrical inner cavity, and a water outlet check valve seat is arranged in the cylindrical inner cavity of the second front valve body part.
6. The non-pressure loss backflow preventer of claim 3, wherein the first rear valve body portion is horizontally mounted with a first rotating shaft arranged perpendicular to the direction of fluid flow, the first rotating shaft is mounted with a driving torsion spring, the first rotating shaft is connected with a water inlet check valve mounting arm, and the water inlet check valve mounting arm is connected to a valve flap of the water inlet check valve.
7. The non-pressure loss backflow preventer of claim 3, wherein the second rear valve body portion is horizontally provided with a second rotating shaft arranged perpendicular to the flow direction of the fluid, the second rotating shaft is provided with a driving torsion spring, the second rotating shaft is connected with a water outlet check valve mounting arm, and the water outlet check valve mounting arm is connected to a valve clack of the water outlet check valve.
8. The non-pressure loss backflow preventer of claim 7, wherein the inlet check valve flap has an arcuate flap body, the arcuate flap body of the inlet check valve flap having a first circumferential projection that abuts against the inlet check valve flap, the first circumferential projection being provided with an inlet check valve seal pair, the tail of the arcuate flap of the inlet check valve flap being provided with a first connection tail.
9. The no-pressure-loss backflow preventer of claim 8, wherein the outlet check valve flap has an arcuate flap body, the arcuate flap body of the outlet check valve flap having a second circumferential projection that abuts against the outlet check valve flap, the second circumferential projection being provided with an outlet check valve seal pair, and a tail of the arcuate flap body of the outlet check valve flap being provided with a second connection tail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922095707.6U CN211820884U (en) | 2019-11-29 | 2019-11-29 | Non-pressure loss backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922095707.6U CN211820884U (en) | 2019-11-29 | 2019-11-29 | Non-pressure loss backflow preventer |
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| Publication Number | Publication Date |
|---|---|
| CN211820884U true CN211820884U (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922095707.6U Active CN211820884U (en) | 2019-11-29 | 2019-11-29 | Non-pressure loss backflow preventer |
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| CN (1) | CN211820884U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114382924A (en) * | 2021-12-27 | 2022-04-22 | 广州高澜节能技术股份有限公司 | Be applied to converter valve refrigerated dual check valve device |
| CN114593216A (en) * | 2022-04-13 | 2022-06-07 | 中恒水务科技有限公司 | Non-resistance backflow preventer of double butterfly valves |
| CN114593224A (en) * | 2022-04-13 | 2022-06-07 | 中恒水务科技有限公司 | Non-resistance backflow preventer with double gate valves |
| CN114658862A (en) * | 2022-04-13 | 2022-06-24 | 中恒水务科技有限公司 | Resistance-free backflow preventer with double stop valves |
| CN114658878A (en) * | 2022-04-13 | 2022-06-24 | 中恒水务科技有限公司 | Non-resistance backflow preventer with double ball valves |
-
2019
- 2019-11-29 CN CN201922095707.6U patent/CN211820884U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114382924A (en) * | 2021-12-27 | 2022-04-22 | 广州高澜节能技术股份有限公司 | Be applied to converter valve refrigerated dual check valve device |
| CN114593216A (en) * | 2022-04-13 | 2022-06-07 | 中恒水务科技有限公司 | Non-resistance backflow preventer of double butterfly valves |
| CN114593224A (en) * | 2022-04-13 | 2022-06-07 | 中恒水务科技有限公司 | Non-resistance backflow preventer with double gate valves |
| CN114658862A (en) * | 2022-04-13 | 2022-06-24 | 中恒水务科技有限公司 | Resistance-free backflow preventer with double stop valves |
| CN114658878A (en) * | 2022-04-13 | 2022-06-24 | 中恒水务科技有限公司 | Non-resistance backflow preventer with double ball valves |
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