CN210344407U

CN210344407U - Backflow preventer

Info

Publication number: CN210344407U
Application number: CN201921376754.1U
Authority: CN
Inventors: 陈根全; 赵江钊; 庄青义
Original assignee: Deer Baoding Smart Fluid Co ltd
Current assignee: Deer Baoding Smart Fluid Co ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2020-04-17
Anticipated expiration: 2029-08-23

Abstract

The utility model discloses a backflow preventer, which comprises a body, the body middle part is fixed with first non return mechanism and second non return mechanism, first non return mechanism, second non return mechanism and body outer wall form the middle chamber, be provided with detection mechanism on the body, detection mechanism includes pressure conduit, hydraulic control valve and head loss sensor, pressure conduit one end communicates with each other with the inlet end of body, the pressure conduit other end communicates with each other with the middle chamber through the hydraulic control valve, the play water end of hydraulic control valve is provided with protection flap, head loss sensor is fixed in the inside in middle chamber, head loss sensor is connected with the controller. The utility model adopts the above structure a backflow preventer, simple structure has two independent non return mechanisms, and it is better to prevent the backflow effect, has detection mechanism simultaneously, when the second non return mechanism takes place the backward flow condition, when detecting liquid reverse flow through head loss sensor, the protection flap is opened simultaneously in the controller warning.

Description

Backflow preventer

Technical Field

The utility model relates to a water supply equipment especially relates to a backflow preventer.

Background

The backflow preventer is one device for preventing backflow of domestic drinking water pipeline from polluting water source. The existing backflow prevention mechanism is a simple single-layer prevention mechanism, and a corresponding alarm structure is not provided, so that a worker cannot find out faults and maintain in time.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a backflow preventer, simple structure has two independent non return mechanisms, and it is better to prevent the backflow effect, has detection mechanism simultaneously, when the second non return mechanism takes place the backward flow condition, when detecting liquid reverse flow through head loss sensor, the protection flap is opened simultaneously in the controller warning.

For realizing the above-mentioned purpose, the utility model provides a backflow preventer, which comprises a body, the body both sides are provided with water inlet and delivery port respectively, the body middle part is fixed with first non return mechanism and second non return mechanism in proper order, first non return mechanism second non return mechanism and body outer wall form the middle chamber, be provided with detection mechanism on the body, detection mechanism includes pressure pipe, hydraulic control valve and head loss sensor pressure pipe one end with the inlet end of body communicates with each other, the pressure pipe other end pass through the hydraulic control valve with the middle chamber communicates with each other, the water outlet end of hydraulic control valve is provided with protection flap, head loss sensor is fixed in the inside of middle chamber, head loss sensor is connected with the controller that is fixed in on the body.

Preferably, be provided with PLC controller, power adapter and bee calling organ in the controller, head loss sensor, power adapter and bee calling organ all with the PLC controller is connected.

Preferably, first non return mechanism and second non return mechanism all include valve plate, fixed cover, support and rebound spring, the rebound spring cover is located on the support, fixed plate is passed to support one end, the support other end is fixed in on the valve plate, the valve plate set up in the fixed cover, the end diameter of intaking of fixed cover is less than the valve plate diameter.

Preferably, the water conservancy control valve includes valve body, push pedal, baffle and return spring, the push pedal pass through the valve rod with baffle fixed connection, the return spring cover is located on the valve rod.

Preferably, the body, the first check mechanism, the second check mechanism and the detection mechanism are all made of stainless steel.

Therefore, the utility model adopts the above structure a backflow preventer, simple structure has two independent non return mechanisms, and it is better to prevent the backflow effect, has detection mechanism simultaneously, when the second non return mechanism takes place the backward flow condition, when detecting liquid reverse flow through head loss sensor, the protection flap is opened simultaneously in the controller warning.

The technical solution of the present invention is further described in detail by the accompanying drawings and examples.

Drawings

FIG. 1 is a schematic view of the internal structure of a backflow preventer of the present invention;

FIG. 2 is a top view of the backflow preventer of the present invention;

FIG. 3 is a schematic view of the internal structure of the hydraulic control valve of the present invention;

fig. 4 is a schematic circuit diagram of the present invention.

Reference numerals

1. A body; 11. a water inlet; 12. a water outlet; 2. a second non-return mechanism; 3. a first non-return mechanism; 4. a non-return mechanism; 41. fixing a sleeve; 42. a valve plate; 43 a support; 44. a rebound spring; 5. a detection mechanism; 51. a pressure conduit; 52. a head loss sensor; 53. a water conservancy control valve; 531. pushing the plate; 532. a return spring; 533. a valve stem; 534. a baffle plate; 54. a protection valve; 6. and a controller.

Detailed Description

Examples

FIG. 1 is a schematic view showing the internal structure of a backflow preventer according to the present invention, FIG. 2 is a top view of the backflow preventer according to the present invention, FIG. 3 is a schematic view showing the internal structure of a hydraulic control valve according to the present invention, FIG. 4 is a schematic view showing the circuit of the present invention, as shown, a backflow preventer comprises a body 1, two check mechanisms 4 are sequentially fixed in the middle of the body 1 at both sides of the body 1, respectively, a water inlet 11 and a water outlet 12, the two check mechanisms 4 are respectively a first check mechanism 3 and a second check mechanism 2, the check mechanisms 4 comprise a valve plate 42, a fixed sleeve 41, a bracket 43 and a rebound spring 44, the rebound spring 44 is sleeved on the bracket 43, one end of the bracket 43 passes through the fixed plate, the other end of the bracket 43 is fixed on the valve plate 42, the valve plate 42 is disposed in the fixed sleeve 41, the diameter of, the valve plate 42 is pushed away by the water pressure, so that the water passes through the check mechanism 4, and when the water does not flow or flows backwards, the valve plate 42 is tightly contacted with the fixed sleeve 41 due to the elasticity of the rebound spring 44 and the water pressure, so that the water flow can only flow in the positive direction.

First non return mechanism 3, second non return mechanism 2 and body 1 outer wall form the middle chamber, be provided with detection mechanism 5 on the body 1, detection mechanism 5 includes pressure conduit 51, hydraulic control valve 53 and head loss sensor 52, pressure conduit 51 one end communicates with each other with the water inlet 11 end of body 1, the pressure conduit 51 other end communicates with each other with the middle chamber through hydraulic control valve 53, the play water end of hydraulic control valve 53 is provided with protection valve 54, head loss sensor 52 is fixed in the inside of middle chamber, head loss sensor 52 is connected with controller 6 that is fixed in on the body 1. A PLC controller, a power adapter, and a buzzer are provided in the controller 6, and the head loss sensor 52, the power adapter, and the buzzer are all connected to the PLC controller. Water conservancy control valve 53 includes the valve body, push pedal 531, baffle 534 and return spring 532, push pedal 531 passes through valve rod 533 and baffle 534 fixed connection, return spring 532 overlaps locates on valve rod 533, when water forward flow, pressure conduit 51's water pressure is big, make promotion push pedal 531 close water conservancy control valve 53, make the water in middle intracavity can not pass through water conservancy control valve 53, when second check mechanism 2 breaks down, water can flow backwards to the middle intracavity, head loss sensor 52 is the normal close formula sensor, when water forward flow, the normal close formula sensor contact is opened, when water does not flow or flows backwards, the normal close formula sensor contact is closed, PLC control receives the closing signal back of normal close formula sensor, the corresponding relay of PLC controller control, start bee calling organ warning and open protection valve 54, this embodiment protection valve 54 is the solenoid valve. Body 1, first non return mechanism 3, second non return mechanism 2 and detection mechanism 5 are stainless steel, accord with drinking water health standard completely.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that: the technical solution of the present invention can still be modified or replaced by other equivalent means, and the modified technical solution can not be separated from the spirit and scope of the technical solution of the present invention.

Claims

1. The utility model provides a backflow preventer, includes the body, the body both sides are provided with water inlet and delivery port respectively, its characterized in that: the body middle part is fixed with first non return mechanism and second non return mechanism in proper order, first non return mechanism second non return mechanism and body outer wall form the middle chamber, be provided with detection mechanism on the body, detection mechanism includes pressure pipe, hydraulic control valve and head loss sensor, pressure pipe one end with the inlet end of body communicates with each other, the pressure pipe other end pass through the hydraulic control valve with the middle chamber communicates with each other, the outlet end of hydraulic control valve is provided with the protection flap, head loss sensor is fixed in the inside of middle chamber, head loss sensor is connected with the controller that is fixed in on the body.

2. A backflow preventer as claimed in claim 1, wherein: be provided with PLC controller, power adapter and bee calling organ in the controller, head loss sensor, power adapter and bee calling organ all with the PLC controller is connected.

3. A backflow preventer as claimed in claim 1, wherein: first non return mechanism and second non return mechanism all include valve plate, fixed cover, support and rebound spring, the rebound spring cover is located on the support, support one end is passed the fixed plate, the support other end is fixed in on the valve plate, the valve plate set up in the fixed cover, the end diameter of intaking of fixed cover is less than the valve plate diameter.

4. A backflow preventer as claimed in claim 1, wherein: the water conservancy control valve includes valve body, push pedal, baffle and return spring, the push pedal pass through the valve rod with baffle fixed connection, the return spring cover is located on the valve rod.

5. A backflow preventer as claimed in claim 1, wherein: the body, the first non-return mechanism, the second non-return mechanism and the detection mechanism are all made of stainless steel.