CN211315243U

CN211315243U - Backflow preventer

Info

Publication number: CN211315243U
Application number: CN201922090102.8U
Authority: CN
Inventors: 姚惟秀; 吴成祝
Original assignee: Anhui Rongda Valve Co Ltd
Current assignee: Anhui Rongda Valve Co Ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-08-21
Anticipated expiration: 2029-11-28

Abstract

The utility model relates to the technical field of pipelines, and discloses a backflow preventer, which comprises a left shell, wherein the right end of the left shell is fixedly connected with a right shell, sealing mechanisms are connected in the left shell and the right shell, and a water stop valve is fixedly connected in the right shell; sealing mechanism includes two fixed connection at the mounting panel of left casing and right shells inner wall, the threaded hole has been seted up to the left lateral wall of mounting panel, the external screw thread pipe has been cup jointed to the screw hole internal thread, the slip pipe has been cup jointed in the internal activity of external screw thread pipe, a plurality of apopores have been seted up to the outer wall of slip pipe, the left end fixedly connected with closing plate of slip pipe. The utility model discloses a set up double seal structure, can guarantee the normal function of backflow preventer.

Description

Backflow preventer

Technical Field

The utility model relates to the technical field of pipelines, especially, relate to backflow preventer.

Background

The backflow preventer is a novel hydraulic control device which is developed according to the current water supply pipe network of China, particularly under the condition that the backflow pollution of the domestic drinking water pipeline is serious and no device for effectively preventing the backflow pollution exists, and can strictly limit the water in the pipeline to flow in one direction only.

The check valve of the existing backflow preventer adopts a single sealing mechanism to seal, and when a single sealing structure is damaged, the check valve can be directly disabled, so that the backflow preventer is disabled.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem of single sealing structure of the check valve of the backflow preventer in the prior art, and providing the backflow preventer.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the backflow preventer comprises a left shell, wherein the right end of the left shell is fixedly connected with a right shell, sealing mechanisms are connected in the left shell and the right shell, and a water stop valve is fixedly connected in the right shell;

sealing mechanism includes the mounting panel of two fixed connection at left casing and right shells inner wall, the threaded hole is seted up to the left lateral wall of mounting panel, the external screw thread pipe has been cup jointed to the screw hole internal thread, the slip pipe has been cup jointed to the internal activity of external screw thread pipe, a plurality of apopores have been seted up to the outer wall of slip pipe, the left end fixedly connected with closing plate of slip pipe, the equal fixedly connected with fixed block of inner wall of left casing and right casing, the slip hole has been seted up to the left lateral wall of fixed block, the left lateral wall fixedly connected with slide bar of closing plate, the slide bar runs through the fixed block through the slip hole, the pole wall movable sleeve of slide bar is equipped with compression spring, the equal fixedly connected with connecting plate of inner wall of left casing.

Preferably, the rod wall of the sliding rod close to the left end is sleeved with a limiting nut in a threaded manner.

Preferably, the equal fixedly connected with splice plate of the one end that left side casing and right casing carried on the back mutually, a plurality of screws have been seted up to the left lateral wall of splice plate.

Preferably, the outer walls of the left shell and the right shell are fixedly connected with hanging rings.

Preferably, the outer walls of the left shell and the right shell are fixedly connected with ring plates, and the ring plates are fixedly connected through fastening bolts.

Compared with the prior art, the utility model provides a backflow preventer possesses following beneficial effect:

this backflow preventer, through the sealing mechanism who sets up, during the use, under the effect of compression spring self resilience force, compression spring promotes the closing plate, make the closing plate paste the left lateral wall of mounting panel, form first sealed, the closing plate drives the slip pipe and removes, make the slip pipe box establish outside the piston, mutually support through piston and slip pipe, can form the second and say sealedly, thereby can be when first sealed impaired, the second is said sealedly can guarantee sealing mechanism normal use, thereby guarantee backflow preventer's normal function.

The part that does not relate to in the device all is the same with prior art or can adopt prior art to realize, the utility model discloses a set up double seal structure, can guarantee the normal function of backflow preventer.

Drawings

FIG. 1 is a schematic view of a backflow preventer according to the present invention;

fig. 2 is a schematic structural view of a portion a in fig. 1.

In the figure: 1 left shell, 2 right shell, 3 sealing mechanism, 31 mounting plate, 32 threaded hole, 33 external threaded pipe, 34 sliding pipe, 35 sealing plate, 36 fixed block, 37 sliding hole, 38 sliding rod, 39 compression spring, 310 connecting plate, 311 piston, 4 water stop valve, 5 limit nut, 6 splice plate, 7 threaded hole, 8 lifting ring, 9 ring plate and 10 fastening bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-2, the backflow preventer comprises a left shell 1, wherein the right end of the left shell 1 is fixedly connected with a right shell 2, a sealing mechanism 3 is connected between the left shell 1 and the right shell 2, and a water stop valve 4 is fixedly connected in the right shell 2;

sealing mechanism 3 includes two fixed connection at the mounting panel 31 of left casing 1 and right casing 2 inner wall, threaded hole 32 has been seted up to the left lateral wall of mounting panel 31, threaded hole 32 internal thread has cup jointed outer threaded pipe 33, outer threaded pipe 33 internal activity has cup jointed sliding tube 34, a plurality of apopores have been seted up to the outer wall of sliding tube, sliding tube 34's left end fixedly connected with closing plate 35, the equal fixedly connected with fixed block 36 of the inner wall of left casing 1 and right casing 2, sliding hole 37 has been seted up to the left lateral wall of fixed block 36, the left lateral wall fixedly connected with slide bar 38 of closing plate 35, slide bar 38 runs through fixed block 36 through sliding hole 37, the pole wall movable sleeve of slide bar 38 is equipped with compression spring 39, the equal fixedly connected with connecting plate 310 of the inner wall of left casing 1 and right casing 2, the left lateral.

The rod wall thread sleeve of the sliding rod 38 near the left end is provided with a limit nut 5 to limit the sliding rod 38 and prevent the sliding rod 38 from separating from the sliding hole 37.

The equal fixedly connected with splice plate 6 of one end that left side casing 1 and right casing 2 carried on the back mutually, a plurality of screws 7 have been seted up to the left lateral wall of splice plate 6, the backflow preventer of being convenient for and the pipe connection.

The outer walls of the left shell 1 and the right shell 2 are fixedly connected with hanging rings 8, so that the backflow preventer can be conveniently carried.

The outer walls of the left shell 1 and the right shell 2 are fixedly connected with ring plates 9, and the two ring plates 9 are fixedly connected through fastening bolts 10, so that the left shell 1 and the right shell 2 are fixed together.

The utility model discloses in, during the use, under the effect of compression spring 39 self resilience force, compression spring 39 promotes closing plate 35, make closing plate 35 paste the left lateral wall of mounting panel 31, it is sealed first way to form, closing plate 35 drives sliding tube 34 and removes, make sliding tube 34 cover establish outside piston 311, mutually support through piston 311 and sliding tube 34, can form the second and say sealedly, thereby can be when sealed impaired first way, the second is said sealedly can guarantee 3 normal use of sealing mechanism, thereby guarantee the normal function of backflow preventer.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The backflow preventer comprises a left shell (1) and is characterized in that the right end of the left shell (1) is fixedly connected with a right shell (2), a sealing mechanism (3) is connected in the left shell (1) and the right shell (2), and a water stop valve (4) is fixedly connected in the right shell (2);

the sealing mechanism (3) comprises two mounting plates (31) fixedly connected to the inner walls of a left shell (1) and a right shell (2), a threaded hole (32) is formed in the left side wall of each mounting plate (31), an external threaded pipe (33) is sleeved in the threaded hole (32), a sliding pipe (34) is sleeved in the external threaded pipe (33) in a movable manner, a plurality of water outlet holes are formed in the outer wall of the sliding pipe (), a sealing plate (35) is fixedly connected to the left end of the sliding pipe (34), fixing blocks (36) are fixedly connected to the inner walls of the left shell (1) and the right shell (2), a sliding hole (37) is formed in the left side wall of each fixing block (36), a sliding rod (38) is fixedly connected to the left side wall of each sealing plate (35), the sliding rod (38) penetrates through the fixing blocks (36) through the sliding holes (37), and a movable compression spring (39) is sleeved, the inner walls of the left shell (1) and the right shell (2) are fixedly connected with a connecting plate (310), and the side wall of the left side of the connecting plate (310) is fixedly connected with a piston (311).

2. Backflow preventer according to claim 1, wherein the wall of the rod near the left end of the sliding rod (38) is threaded with a stop nut (5).

3. A backflow preventer according to claim 1, wherein the opposite ends of the left casing (1) and the right casing (2) are both fixedly connected with a splice plate (6), and the side wall of the left side of the splice plate (6) is provided with a plurality of screw holes (7).

4. Backflow preventer according to claim 1, characterized in that the outer walls of the left (1) and right (2) housings are both fixedly connected with a lifting ring (8).

5. Backflow preventer according to claim 1, wherein the outer walls of the left and right housings (1, 2) are fixedly connected with ring plates (9), and the two ring plates (9) are fixedly connected by means of fastening bolts (10).