CN217056461U

CN217056461U - Backflow preventer with double-stage non-return function

Info

Publication number: CN217056461U
Application number: CN202220615106.2U
Authority: CN
Inventors: 季能平; 季天娇; 宋云阳
Original assignee: Shanghai Shanglong Water Supply Equipment Co ltd
Current assignee: Shanghai Shanglong Water Supply Equipment Co ltd
Priority date: 2022-03-14
Filing date: 2022-03-14
Publication date: 2022-07-26
Anticipated expiration: 2032-03-14

Abstract

The utility model discloses a backflow preventer with a two-stage non-return function, which relates to the technical field of backflow preventers and solves the technical problems that the backflow preventer in the current market usually adopts single-stage non-return, so that the non-return effect is not ideal enough, thereby possibly causing pollution, and the existing backflow preventer usually needs to be installed by a hand-held device aiming at a pipeline, so that the installation is not convenient enough, thereby increasing the labor intensity of workers; the valve comprises a valve body, wherein two ends of the valve body are fixedly connected with connecting flanges, a plugging ring is fixedly connected inside the valve body, a fixed plate is fixedly connected to one side of the plugging ring, a connecting rod is movably inserted into the fixed plate, one end of the connecting rod is fixedly connected with a plugging plug, a spring is fixedly connected between the plugging plug and the fixed plate, and a plugging assembly is arranged inside the valve body; the utility model discloses have the effectual effect of anti-backflow.

Description

Backflow preventer with double-stage non-return function

Technical Field

The utility model relates to a backflow preventer technical field especially relates to backflow preventer with doublestage non return function.

Background

The backflow preventer is generally used for tap water supply equipment, and particularly has the functions of preventing media in a pipeline from flowing backwards under the conditions that the backflow pollution of a domestic drinking water pipeline is serious and no backflow pollution preventing device is available so as to achieve the purpose of avoiding backflow pollution;

however, the backflow preventer in the current market generally adopts a single-stage non-return mode, so that the non-return effect is not ideal enough, and therefore pollution can be caused, and the conventional backflow preventer is generally installed by aiming at a pipeline with a hand-held device, so that the installation is not convenient enough, and the labor intensity of workers is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a backflow preventer with doublestage non return function has solved backflow preventer on the existing market and has adopted the single-stage to end absolutely usually, leads to ending the effect ideal inadequately to probably still can cause the pollution, and current backflow preventer need install with hand device alignment pipeline usually, and is convenient inadequately when leading to the installation, thereby increases staff intensity of labour's technical problem.

In order to solve the technical problem, the utility model provides a backflow preventer with doublestage non return function, which comprises a valve body, the equal fixedly connected with flange in both ends of valve body, the inside fixedly connected with shutoff ring of valve body, one side fixedly connected with fixed plate of shutoff ring, the inside activity of fixed plate is pegged graft and is had the connecting rod, the one end fixedly connected with shutoff of connecting rod blocks up, fixedly connected with spring between shutoff and the fixed plate, the inside of valve body is provided with the shutoff subassembly.

Preferably, the shutoff subassembly includes baffle, flexible cover, recess, the first opening of a plurality of and a plurality of second opening, baffle fixed connection is in the inside of valve body, flexible cover fixed connection is in one side of baffle, the recess is seted up in one side that the baffle is close to the flexible cover, a plurality of first opening all is the inside of evenly seting up at the flexible cover, a plurality of the second opening all is the inside of evenly seting up at the baffle.

Preferably, the flexible sleeve is made of rubber.

Preferably, the bottom of valve body is equipped with the bottom plate, the top fixedly connected with adjusting part of bottom plate, adjusting part fixed connection is in the bottom of valve body.

Preferably, the adjusting assembly comprises a fixed cylinder, a screw rod and a nut, the fixed cylinder is fixedly connected to the top of the bottom plate, the screw rod is inserted into the fixed cylinder in a sliding mode, the top of the screw rod is fixedly connected with the bottom of the valve body, the nut is connected to the outer portion of the screw rod in a threaded mode, and the nut is rotatably connected to the top of the fixed cylinder.

Preferably, a limiting groove is formed in the fixing barrel, a limiting plate is fixedly connected to the outer portion of the screw rod, and the screw rod is connected with the limiting groove in a sliding mode through the limiting plate.

Compared with the prior art, the utility model provides a backflow preventer with doublestage non return function has following beneficial effect:

1. the valve body is connected with a pipeline through a connecting flange, when the valve body is used, fluid enters the interior of the valve body from one side, close to a fixed plate, of a blocking ring, the blocking can be pushed through the thrust of the fluid, the blocking is not blocked by the blocking ring, the spring is stretched, the fluid can penetrate through the blocking ring, then the fluid penetrates through the baffle through a second port in the baffle, then the fluid penetrates through the flexible sleeve through a first port and then flows out, if the thrust of the fluid is small, the blocking plug cannot be pushed away from the blocking ring under the action of the spring, the fluid cannot penetrate through the blocking ring, if backflow occurs, the fluid flows in from the other end of the valve body, the first port is pushed into the interior of the groove, the flexible sleeve can block the second port, the first port is staggered with the second port, and the fluid cannot penetrate through the flexible sleeve and the baffle, therefore, backflow is prevented, the first backflow preventing effect is poor, the penetrating fluid can push the blocking plug, the blocking plug can be clamped into the inside of the blocking ring more tightly, the backflow preventing effect is better, and the backflow preventing effect is good through the bipolar backflow preventing effect.

2. When the valve body is installed, the nut can be rotated, the nut is matched with the screw thread between the screw and the screw rod, the nut is rotated at the top of the fixing cylinder, the screw rod cannot rotate in the fixing cylinder, the screw rod can be driven to move in the vertical direction, the valve body adjusting position can be driven, the valve body can be supported by the adjusting assembly and the bottom plate in a matched mode, the valve body can be adjusted to a proper position during installation, the valve body does not need to be vacated, and the valve body is convenient to install.

Drawings

FIG. 1 is a perspective view of the whole structure of the present invention;

FIG. 2 is a schematic sectional view of the adjusting assembly of the present invention;

FIG. 3 is a schematic sectional view of the valve body of the present invention;

fig. 4 is a schematic structural diagram of the plugging assembly of the present invention.

Reference numbers in the figures: 1. a valve body; 2. a connecting flange; 3. a plugging ring; 4. a fixing plate; 5. a connecting rod; 6. blocking; 7. a spring; 8. a plugging component; 801. a baffle plate; 802. a flexible sleeve; 803. a groove; 804. a first port; 805. a second port; 9. a base plate; 10. an adjustment assembly; 1001. a fixed cylinder; 1002. a screw rod; 1003. a nut; 11. a limiting groove; 12. and a limiting plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Embodiment one is given by fig. 1-4, the utility model discloses a valve body 1, the equal fixedly connected with flange 2 in both ends of valve body 1, the inside fixedly connected with shutoff ring 3 of valve body 1, one side fixedly connected with fixed plate 4 of shutoff ring 3, the inside activity of fixed plate 4 is pegged graft and is had connecting rod 5, the one end fixedly connected with shutoff of connecting rod 5 blocks up 6, fixedly connected with spring 7 between shutoff stopper 6 and the fixed plate 4, the inside of valve body 1 is provided with shutoff subassembly 8.

Specifically, the valve body 1 is connected with the pipeline through the connecting flange 2, when the valve body is used, fluid enters the interior of the valve body 1 from one side, close to the fixing plate 4, of the plugging ring 3, the plugging 6 can be pushed through the thrust of the fluid, so that the plugging 6 loses the plugging on the plugging ring 3, at this time, the spring 7 is stretched, so that the fluid can pass through the plugging ring 3 and pass through the plugging component 8, and if the fluid is guided, the fluid cannot pass through the plugging component 8 and pass through the plugging ring 3 and the plugging plug 6.

In the second embodiment, on the basis of the first embodiment, the plugging assembly 8 includes a baffle 801, a flexible sleeve 802, a groove 803, a plurality of first ports 804 and a plurality of second ports 805, the baffle 801 is fixedly connected inside the valve body 1, the flexible sleeve 802 is fixedly connected on one side of the baffle 801, the groove 803 is arranged on one side of the baffle 801 close to the flexible sleeve 802, the plurality of first ports 804 are uniformly arranged inside the flexible sleeve 802, and the plurality of second ports 805 are uniformly arranged inside the baffle 801.

Specifically, fluid passes through the second through hole 805 on the baffle plate 801, enters the inside of the flexible sleeve 802 through the baffle plate 801, then passes through the flexible sleeve 802 through the first through hole 804, and then flows out, if the fluid pushing force is small, the blocking plug 6 cannot be pushed away from the blocking ring 3 under the action of the spring 7, at this time, the fluid cannot pass through, if backflow occurs, the fluid flows in from the other end of the valve body 1, so that the first through hole 804 is pushed into the inside of the groove 803, at this time, the flexible sleeve 802 can block the second through hole 805, and the positions of the first through hole 804 and the second through hole 805 are staggered, so that the fluid cannot pass through the flexible sleeve 802 and the baffle plate 801, so as to prevent backflow, and the first backflow preventing effect is not good, so that the fluid passing through can push the blocking plug 6, so that the blocking plug 6 can only be clamped into the inside of the blocking ring 3 more tightly, so that the backflow preventing effect is better.

In the third embodiment, based on the second embodiment, the flexible sleeve 802 is made of rubber.

Specifically, the rubber is made of a material capable of reversibly deforming, is elastic, can deform under the action of external force, and can restore to the original shape after the external force is removed, so that the second through hole 805 can be well plugged, and the flexible sleeve 802 can be made of other elastic materials and is waterproof.

In the fourth embodiment, on the basis of the first embodiment, the bottom of the valve body 1 is provided with a bottom plate 9, the top of the bottom plate 9 is fixedly connected with an adjusting assembly 10, and the adjusting assembly 10 is fixedly connected to the bottom of the valve body 1.

In particular, the position of the valve body 1 can be adjusted by means of the adjustment assembly 10.

Fifth embodiment, on the basis of the fourth embodiment, the adjusting assembly 10 includes a fixed cylinder 1001, a lead screw 1002 and a nut 1003, the fixed cylinder 1001 is fixedly connected to the top of the bottom plate 9, the lead screw 1002 is slidably inserted into the fixed cylinder 1001, the top of the lead screw 1002 is fixedly connected to the bottom of the valve body 1, the nut 1003 is screwed on the outside of the lead screw 1002, and the nut 1003 is rotatably connected to the top of the fixed cylinder 1001.

Specifically, during installation valve body 1, can rotate nut 1003, through the screw-thread fit between nut 1003 and the lead screw 1002, and nut 1003 rotates the top at solid fixed cylinder 1001, and lead screw 1002 can't rotate in the inside of solid fixed cylinder 1001 again, just so can drive lead screw 1002 and carry out the removal of vertical direction, just so can drive 1 adjusting position of valve body, and adjusting part 10 can support valve body 1 with bottom plate 9 cooperation, just so can adjust valve body 1 to suitable position during the installation, and need not vacate hand valve body 1.

In the sixth embodiment, on the basis of the fifth embodiment, a limiting groove 11 is formed in the fixing cylinder 1001, a limiting plate 12 is fixedly connected to the outside of the screw rod 1002, and the screw rod 1002 is slidably connected with the limiting groove 11 through the limiting plate 12.

Specifically, the lead screw 1002 is prevented from rotating inside the fixed barrel 1001 by the stopper plate 12 slidably attached inside the stopper groove 11, and the movement thereof is made more stable.

The working principle is as follows:

the valve body 1 is connected with a pipeline through the connecting flange 2, when in use, fluid enters the interior of the valve body 1 from one side of the plugging ring 3 close to the fixing plate 4, the plugging 6 can be pushed through the thrust of the fluid, so that the plugging 6 loses the plugging of the plugging ring 3, at the moment, the spring 7 is stretched, so that the fluid can pass through the plugging ring 3, then passes through the baffle 801 through the second through hole 805 on the baffle 801 to enter the interior of the flexible sleeve 802, then passes through the flexible sleeve 802 through the first through hole 804 and then flows out, if the thrust of the fluid is small, the plugging 6 cannot be pushed away from the plugging ring 3 under the action of the spring 7, at the moment, the fluid cannot pass through, if backflow occurs, the fluid enters from the other end of the valve body 1, so that the first through hole 804 is pushed to enter the interior of the groove 803, at the moment, the flexible sleeve 802 can plug the second through hole 805, and the first through hole 804 and the second through hole 805 are staggered in position, the fluid can not pass through flexible cover 802 and baffle 801 like this, thereby prevent the backward flow, and first anti-reflux effect is not good, the fluid that so passes can promote to seal and block up 6, seal and block up 6 like this and only can inseparabler card go into the inside of shutoff ring 3, make anti-reflux effect better, when installing valve body 1, can rotate nut 1003, through the screw-thread fit between nut 1003 and the lead screw 1002, and nut 1003 rotates at the top of solid fixed cylinder 1001, and lead screw 1002 can not rotate at the inside of solid fixed cylinder 1001 again, just so can drive lead screw 1002 and carry out vertical direction's removal, just so can drive valve body 1 adjusting position, and adjusting part 10 and bottom plate 9 cooperate and can support valve body 1, just so can adjust valve body 1 to suitable position during the installation, and need not vacate hand and hold up valve body 1, the effect of convenient installation has been reached from this.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Backflow preventer with double-stage check function, including valve body (1), its characterized in that: the improved valve is characterized in that connecting flanges (2) are fixedly connected to the two ends of the valve body (1), a plugging ring (3) is fixedly connected to the inside of the valve body (1), a fixing plate (4) is fixedly connected to one side of the plugging ring (3), a connecting rod (5) is movably inserted into the inside of the fixing plate (4), a plugging plug (6) is fixedly connected to one end of the connecting rod (5), a spring (7) is fixedly connected between the plugging plug (6) and the fixing plate (4), and a plugging assembly (8) is arranged inside the valve body (1).

2. The backflow preventer with double-stage non-return function according to claim 1, wherein the blocking assembly (8) comprises a baffle plate (801), a flexible sleeve (802), a groove (803), a plurality of first ports (804) and a plurality of second ports (805), the baffle plate (801) is fixedly connected inside the valve body (1), the flexible sleeve (802) is fixedly connected to one side of the baffle plate (801), the groove (803) is arranged on one side of the baffle plate (801) close to the flexible sleeve (802), the first ports (804) are uniformly arranged inside the flexible sleeve (802), and the second ports (805) are uniformly arranged inside the baffle plate (801).

3. The backflow preventer with dual-stage check function according to claim 2, wherein the flexible sleeve (802) is made of rubber.

4. The backflow preventer with double-stage non-return function according to claim 1, wherein a bottom plate (9) is disposed at the bottom of the valve body (1), an adjusting assembly (10) is fixedly connected to the top of the bottom plate (9), and the adjusting assembly (10) is fixedly connected to the bottom of the valve body (1).

5. Backflow preventer with dual-stage non-return function according to claim 4, wherein the adjusting assembly (10) comprises a fixed cylinder (1001), a lead screw (1002) and a nut (1003), the fixed cylinder (1001) is fixedly connected to the top of the base plate (9), the lead screw (1002) is slidably inserted into the fixed cylinder (1001), the top of the lead screw (1002) is fixedly connected to the bottom of the valve body (1), the nut (1003) is screwed on the outside of the lead screw (1002), and the nut (1003) is rotatably connected to the top of the fixed cylinder (1001).

6. The backflow preventer with two-stage non-return function according to claim 5, wherein the fixed cylinder (1001) is internally provided with a limiting groove (11), the exterior of the screw rod (1002) is fixedly connected with a limiting plate (12), and the screw rod (1002) is slidably connected with the limiting groove (11) through the limiting plate (12).