Drainage device for backflow preventer

Abstract

The utility model belongs to the technical field of backflow preventers, and particularly relates to a drainer for a backflow preventer, which comprises a backflow preventer body. A water escape valve is mounted at the bottom of the backflow preventer body; the bottom of the water escape valve is fixedly connected with a water drainage pipe; a drainage hopper is mounted at the bottom of the drainage pipe; a fixing assembly is arranged on the side wall of the drainage pipe; a connecting assembly is arranged at the bottom of the lower water hopper; the bottom of the connecting assembly is fixedly connected with a corrugated pipe; by means of the structure, the drainage pipe, the drainage hopper and the corrugated pipe are arranged and matched with the base and the sleeve, reverse flowing water drained from the water escape valve can be conveniently drained, the corrugated pipe can be conveniently stretched or shortened according to actual needs through the telescopic structure, the applicability during use is improved, meanwhile, the middle section of the corrugated pipe is wrapped by the sleeve, and the service life of the corrugated pipe is prolonged. The situation that when water flows in the long corrugated pipe, the water bounces and shakes, and consequently the tail end of the water is separated from the floor drain can be reduced, and the stability of the position of the corrugated pipe can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of backflow preventer, specifically speaking is the water drainer for backflow preventer. BACKGROUND

[0002] Backflow preventer is a device for preventing the water flow of water supply pipeline, mainly used for preventing backflow pollution, mainly composed of check component, preventing backflow by strictly limiting the water in the pipeline to flow only in one direction.

[0003] Backflow preventer is usually installed in the middle of the pipeline, in the normal flow state, the water pressure of the water inlet end is higher than that of the water outlet end, and the water can smoothly pass through the backflow preventer, when zero flow state or reverse siphon state occurs, the drain valve will automatically open, the water in the valve cavity is discharged, and the air is prevented from siphon backflow, in the long time use observation, it is found that the drain valve outside usually needs to be connected with the drain pipeline, then the pipeline is connected with the floor drain or the drainage ditch, and the drain pipe is usually flexible material, and the fixing mode is relatively simple, so that the water in the drain pipe flows and makes the drain pipe jump, thereby making the pipeline end from the floor drain or the drainage ditch.

[0004] Therefore, the utility model provides a water drainer for backflow preventer. UTILITY MODEL CONTENT

[0005] In order to make up for the deficiency of the prior art, solve at least one problem in the background art, the water drainer for backflow preventer is provided.

[0006] The utility model solves the technical scheme that the utility model discloses a water drainer for backflow preventer, including backflow preventer body, the backflow preventer body bottom is installed with drain valve, the drain valve bottom is fixedly connected with drain pipe, the drain pipe bottom is installed with the water bucket, the drain pipe side wall is equipped with fixed component, the water bucket bottom is equipped with connecting component, the connecting component bottom is fixedly connected with bellows, the bellows middle part is equipped with sleeve pipe, the bellows side wall is equipped with base, the sleeve pipe is fixedly connected at the base top, through above-mentioned structure, setting up drain pipe and water bucket and bellows, cooperate with base and sleeve pipe, can conveniently drain the backflow water that is discharged from drain valve, the telescopic structure of bellows can be elongated or shortened according to actual needs, to improve the applicability when using, and the sleeve pipe is wrapped around the middle section of the bellows, which can reduce the bouncing of the water in the long bellows, prevent the end from being pulled out of the floor drain, and improve the stability of the bellows position.

[0007] Preferably, the fixing assembly comprises a pair of fixing ears; the pair of fixing ears are fixedly connected in the middle of the downcomer; a fixing frame is fixedly connected to the side wall of the drain pipe; a bidirectional screw rod is rotatably connected to the middle of the fixing frame; a pair of sliding blocks are symmetrically and threadedly connected to the middle of the bidirectional screw rod; a plug rod is fixedly connected to the side wall of the sliding block; through the above structure, the fixing ears are arranged with the fixing frame and the bidirectional screw rod, and the sliding block is arranged with the plug rod, so that the downcomer and the drain pipe can be conveniently connected and detached, and the convenience of connection between the downcomer and the drain pipe is improved.

[0008] Preferably, the sleeve is provided with an extension pipe at both ends; a pair of adjusting rings are rotatably connected to the middle of the sleeve; the adjusting rings are threadedly connected with the extension pipes; a positioning groove is formed in the middle of the extension pipe; a positioning strip is fixedly connected to the side wall of the sleeve; through the above structure, the extension pipe and the adjusting ring are arranged, and the positioning strip and the positioning groove are matched, so that the extension pipe can be raised or lowered in the sleeve, so as to conveniently lengthen or shorten the overall length of the sleeve, so as to improve the contact surface between the sleeve and the corrugated pipe during stretching of the corrugated pipe, thereby improving the wrapping and supporting effect on the corrugated pipe.

[0009] Preferably, the connecting assembly comprises a filter box; the filter box is fixedly connected to the bottom of the downcomer; a fixed frame is installed in the filter box; the fixed frame is in sliding fit with the filter box; a filter screen is installed in the middle of the fixed frame; a cover plate is fixedly connected to the side wall of the fixed frame; through the above structure, the filter box, the fixed frame and the filter screen are arranged, and the cover plate is used in cooperation, so that impurities in the backflow water can be conveniently filtered, so as to reduce the accumulation of impurities in the corrugated pipe, thereby preventing blockage of the corrugated pipe; and the sliding structure of the fixed frame and the filter box can conveniently take out the filter screen from the filter box for cleaning, thereby improving the convenience during use.

[0010] Preferably, the backflow preventer body is provided with a baffle plate on the top; a pair of support rods are fixedly connected to the bottom of the baffle plate; a pair of fixing seats are fixedly connected to the side wall of the backflow preventer body; through the above structure, the baffle plate, the support rods and the fixing seats are arranged, so that the backflow preventer body can be shielded and protected from the top in an outdoor environment, thereby reducing the rain erosion and sunlight exposure of the backflow preventer body in the outdoor environment, and preventing the backflow preventer body from being damaged due to serious oxidation and corrosion.

[0011] Preferably, the downcomer is provided with a protective plate fixedly connected to the top; the height of the top of the protective plate exceeds the bottom of the drain pipe; through the above structure, the protective plate is connected to the downcomer, so as to provide protection when the water level in the downcomer rises, thereby reducing the overflow from the top of the downcomer when the water level rises.

[0012] The beneficial effects of the utility model are as follows:

[0013] 1. The drainage device for the backflow preventer, through the setting up drainage pipe and the downcomer and the bellows, cooperation base and sleeve, can be convenient for the drainage of the backflow water that is discharged from the drain valve, the telescopic structure of the bellows is convenient for elongation or shortening according to the actual need, so as to improve the applicability when using, and the sleeve is wrapped around the middle section of the bellows, so as to reduce the situation that the water in the lengthier bellows bounces and shakes to cause the end to be separated from the floor drain, and the stability of the bellows position can be improved.

[0014] 2. The drainage device for the backflow preventer, through the setting up fixed lug and fixed frame and bidirectional screw rod, cooperation sliding block and plug rod, the movable structure can be convenient for connecting and dismounting the downcomer and the drainage pipe, so as to improve the convenience of the connection between the downcomer and the drainage pipe. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model makes further explanation in combination with the drawings.

[0016] Figure 1 It is the perspective view of the utility model;

[0017] Figure 2 It is the cooperation structure schematic view of the drainage pipe and the downcomer in the utility model;

[0018] Figure 3 It is the structure schematic view of the filter box in the utility model;

[0019] Figure 4 It is the structure schematic view of the sleeve in the utility model.

[0020] Legend:

[0021] 1, backflow preventer body;11, drain valve;12, drainage pipe;13, downcomer;14, bellows;15, base;16, sleeve;2, fixed lug;21, fixed frame;22, bidirectional screw rod;23, sliding block;24, plug rod;4, extension pipe;41, adjusting ring;42, positioning strip;43, positioning groove;5, filter box;51, fixed frame;52, filter screen;53, cover plate;6, baffle;61, support rod;62, fixed seat;7, protection plate. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0023] Specific embodiments are given below.

[0024] As Figures 1 to 4 The utility model discloses a drain ware for backflow preventer, including backflow preventer body 1, backflow preventer body 1 bottom is installed and is drained valve 11, and drained valve 11 bottom is fixed with drain pipe 12, and drain pipe 12 bottom is installed and is downcomer 13, and drain pipe 12 side wall is equipped with fixed assembly, and downcomer 13 bottom is equipped with connecting assembly, and connecting assembly bottom is fixed with bellow 14, and bellow 14 middle part is equipped with sleeve pipe 16, and bellow 14 side wall is equipped with base 15, and sleeve pipe 16 is fixed in base 15 top, when working, backflow preventer body 1 horizontal installation is in the middle part of pipeline, then base 15 is fixed in bellow 14 one side through the mode such as sticking or bolt, then bellow 14 passes through sleeve pipe 16 and is connected with drain channel or floor drain, when the backflow situation appears in pipeline, drained valve 11 will open and make the water of backflow from backflow preventer body 1 flow out, when backflow water from drained valve 11 passes through drain pipe 12 and enters downcomer 13, then passes through connecting assembly and enters bellow 14, then is discharged into floor drain or drain channel again, through above-mentioned structure, setting drain pipe 12 and downcomer 13 and bellow 14, cooperate base 15 and sleeve pipe 16, can conveniently drain the backflow of discharge from drained valve 11, the telescopic structure of bellow 14 can conveniently elongate or shorten according to actual need, to improve the applicability when using, and sleeve pipe 16 is wrapped to the middle segment position of bellow 14, can reduce the situation that the end is separated from floor drain due to the springing and shaking of water when flowing in the lengthier bellow 14, can improve the stability of bellow 14 position.

[0025] As Figure 2As shown, the fixing assembly comprises a pair of fixing ears 2; a pair of the fixing ears 2 are fixedly connected in the middle of the downcomer 13; the side wall of the drain pipe 12 is fixedly connected with a fixing frame 21; the middle of the fixing frame 21 is rotationally connected with a bidirectional screw rod 22; the middle of the bidirectional screw rod 22 is symmetrically and threadedly connected with a pair of sliding blocks 23; the side wall of the sliding block 23 is fixedly connected with a plug rod 24; in working, when the downcomer 13 is installed on the drain pipe 12, the hole in the middle of the fixing ear 2 is aligned with the plug rod 24, then the bidirectional screw rod 22 is rotated to drive the pair of sliding blocks 23 to relatively slide in the fixing frame 21, at this time, the sliding block 23 drives the plug rod 24 to move, when the bidirectional screw rod 22 is forwardly rotated, the pair of plug rods 24 can be driven to approach each other, so that the plug rod 24 is inserted into the hole in the fixing ear 2, at this time, the downcomer 13 can be fixed on the drain pipe 12, when the downcomer 13 needs to be disassembled for maintenance, the plug rod 24 can be driven to move away from each other by reversing the bidirectional screw rod 22, so that the fixing of the downcomer 13 is released, through the above structure, the fixing ear 2 is arranged with the fixing frame 21 and the bidirectional screw rod 22, and the sliding block 23 is arranged with the plug rod 24, the movable structure can facilitate the connection and disassembly of the downcomer 13 and the drain pipe 12, so as to improve the convenience of the connection between the downcomer 13 and the drain pipe 12.

[0026] As shown in the figure, Figure 4 As shown, the sleeve 16 is provided with an extension pipe 4 at both ends; the middle of the sleeve 16 is rotationally connected with a pair of adjusting rings 41; the adjusting ring 41 is threadedly connected with the extension pipe 4; the middle of the extension pipe 4 is provided with a positioning groove 43; the side wall of the sleeve 16 is fixedly connected with a positioning strip 42; in working, the extension pipe 4 can be raised or lowered in the sleeve 16 by forward or reverse rotation of the adjusting ring 41, at this time, the adjusting ring 41 can change the direction to lengthen or shorten the length of the sleeve 16, when the corrugated pipe 14 is lengthened, the extension pipe 4 can be lengthened on the sleeve 16, when the base 15 is shortened, the extension pipe 4 can be shortened on the sleeve 16, through the above structure, the extension pipe 4 is arranged with the adjusting ring 41, and the positioning strip 42 is arranged with the positioning groove 43, the extension pipe 4 can be raised or lowered in the sleeve 16, so as to lengthen or shorten the overall length of the sleeve 16, so as to improve the contact surface between the sleeve 16 and the corrugated pipe 14 when the corrugated pipe 14 is stretched, thereby improving the wrapping and supporting effect of the corrugated pipe 14.

[0027] As shown in the figure, Figure 3As shown, the connecting assembly comprises a filter box 5; the filter box 5 is fixed at the bottom of the downcomer 13; a fixed frame 51 is installed in the filter box 5; the fixed frame 51 is in sliding fit with the filter box 5; a filter screen 52 is installed in the middle of the fixed frame 51; a cover plate 53 is fixed on the side wall of the fixed frame 51; during operation, the backflow water enters the corrugated pipe 14 through the inside of the filter box 5, the fixed frame 51 is inserted into the filter box 5, and then the cover plate 53 is fixed with the filter box 5 by bolts, when the backflow water contains particles and other impurities, the impurities are filtered by the filter screen 52 in the filter box 5, and the filtered water flows into the corrugated pipe 14, through the above structure, the filter box 5, the fixed frame 51 and the filter screen 52 are used in cooperation with the cover plate 53, which can facilitate the filtration of impurities in the backflow water, reduce the accumulation of impurities in the corrugated pipe 14, and prevent the corrugated pipe 14 from being blocked, and the sliding structure of the fixed frame 51 and the filter box 5 can facilitate the removal of the filter screen 52 from the filter box 5 for cleaning, improving the convenience during use.

[0028] As shown in Figure 1 , the backflow preventer body 1 top installation has a baffle 6; a pair of support rods 61 are fixed at the bottom of the baffle 6; a pair of fixed seats 62 are fixed on the side wall of the backflow preventer body 1; during operation, when the backflow preventer body 1 is installed in the outdoor environment, the support rods 61 can be inserted into the fixed seats 62, and then the bottom of the support rods 61 is connected by a nut, so that the support rods 61 are fixed on the fixed seats 62, at this time the baffle 6 covers the backflow preventer body 1 from above, through the above structure, the baffle 6, the support rods 61 and the fixed seats 62 are set, which can facilitate the shielding and protection of the backflow preventer body 1 from the top in the outdoor environment, to reduce the rain erosion or sunlight exposure of the backflow preventer body 1 in the outdoor environment, and to reduce the damage of the backflow preventer body 1 caused by serious oxidation corrosion.

[0029] As shown in Figure 2 , the downcomer 13 top fixed has a protection plate 7; the height of the protection plate 7 top exceeds the bottom of the drain pipe 12; during operation, when the water flow entering the downcomer 13 is large, the water level in the downcomer 13 will rise, at this time the protection plate 7 will block the rising water level from the top of the downcomer 13, through the above structure, the protection plate 7 is connected with the downcomer 13, which can be protected when the water level in the downcomer 13 rises, to reduce the overflow from the top of the downcomer 13 when the water level rises.

[0030] As shown in Figure 1 , the baffle 6 is made of stainless steel; through the above structure, the baffle 6 is made of stainless steel, which can improve its own corrosion resistance, to reduce the damage caused by corrosion in long-term use.

[0031] Working principle: the body 1 of the backflow preventer is installed horizontally in the middle of the pipeline, then the base 15 is fixed on one side of the corrugated pipe 14 by means of gluing or bolts, etc., then the corrugated pipe 14 is inserted through the sleeve 16 and connected with the drain or floor drain, when backflow occurs in the pipeline, the drain valve 11 is opened to make the backflow water flow out of the body 1 of the backflow preventer, at this time the backflow water flows from the drain valve 11 into the sump 13 through the drain pipe 12, then enters the corrugated pipe 14 through the connecting assembly, and then is discharged into the floor drain or drain, when the sump 13 is installed on the drain pipe 12, the hole in the middle of the fixing lug 2 is aligned with the insertion rod 24, then the two-way screw rod 22 is rotated to drive the pair of sliding blocks 23 to slide relatively in the fixing frame 21, at this time the sliding blocks 23 drive the insertion rod 24 to move, when the two-way screw rod 22 is rotated forward, the pair of insertion rods 24 can be brought close to each other, so that the insertion rod 24 is inserted into the hole in the fixing lug 2, at this time the sump 13 can be fixed on the drain pipe 12, when the sump 13 needs to be disassembled for maintenance, the two-way screw rod 22 can be reversed to drive the insertion rods 24 to move away from each other, so that the sump 13 is released, by rotating the adjusting ring 41 forward or reversely, the extension pipe 4 can be raised or lowered in the sleeve 16, at this time the adjusting ring 41 can change the length of the sleeve 16, when the corrugated pipe 14 is lengthened, the extension pipe 4 can be lengthened on the sleeve 16, when the base 15 is shortened, the extension pipe 4 can be shortened on the sleeve 16, before the backflow water enters the corrugated pipe 14 from the sump 13, it will pass through the inside of the filter box 5, the fixed frame 51 is inserted into the filter box 5, and then the cover plate 53 is fixed with the filter box 5 by bolts, when the backflow water contains impurities such as particles and silt, the filter screen 52 in the filter box 5 can filter the impurities, and the filtered water flows into the corrugated pipe 14, when the backflow preventer body 1 is installed in an outdoor environment, the support rod 61 can be inserted into the fixed seat 62, and then the bottom of the support rod 61 is connected by a nut, so that the support rod 61 is fixed on the fixed seat 62, at this time the baffle 6 covers the backflow preventer body 1 from above, when the water flow entering the sump 13 is large, the water level in the sump 13 will rise, at this time the protective plate 7 will block the rising water level from the top of the sump 13.

[0032] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A drain for a backflow preventer, comprising a backflow preventer body (1); characterized in that: The bottom of the backflow preventer body (1) is provided with a drain valve (11); the bottom of the drain valve (11) is fixedly connected with a drain pipe (12); the bottom of the drain pipe (12) is provided with a drain hopper (13); the side wall of the drain pipe (12) is provided with a fixing assembly; the bottom of the drain hopper (13) is provided with a connecting assembly; the bottom of the connecting assembly is fixedly connected with a corrugated pipe (14); the middle of the corrugated pipe (14) is sleeved with a sleeve pipe (16); the side wall of the corrugated pipe (14) is provided with a base (15); and the sleeve pipe (16) is fixedly connected to the top of the base (15).

2. The drain for a backflow preventer according to claim 1, characterized by: The fixing assembly comprises a pair of fixing ears (2); the pair of fixing ears (2) are fixedly connected to the middle of the drain hopper (13); the side wall of the drain pipe (12) is fixedly connected with a fixing frame (21); the middle of the fixing frame (21) is rotatably connected with a bidirectional screw rod (22); the middle of the bidirectional screw rod (22) is symmetrically and threadedly connected with a pair of sliding blocks (23); and the side wall of the sliding block (23) is fixedly connected with a plug rod (24).

3. The drain for a backflow preventer according to claim 1, characterized by: Both ends of the sleeve pipe (16) are provided with extension pipes (4); the middle of the sleeve pipe (16) is rotatably connected with a pair of adjusting rings (41); the adjusting ring (41) is threadedly connected with the extension pipe (4); the middle of the extension pipe (4) is provided with a positioning groove (43); and the side wall of the sleeve pipe (16) is fixedly connected with a positioning strip (42).

4. The drain for a backflow preventer according to claim 1, characterized by: The connecting assembly comprises a filter box (5); the filter box (5) is fixedly connected to the bottom of the drain hopper (13); the filter box (5) is provided with a fixed frame (51); the fixed frame (51) is slidably connected with the filter box (5); the middle of the fixed frame (51) is provided with a filter screen (52); and the side wall of the fixed frame (51) is fixedly connected with a cover plate (53).

5. The drain for a backflow preventer according to claim 1, characterized by: The top of the backflow preventer body (1) is provided with a baffle (6); the bottom of the baffle (6) is fixedly connected with a pair of supporting rods (61); and the side wall of the backflow preventer body (1) is fixedly connected with a pair of fixing bases (62).

6. The drain for a backflow preventer according to claim 1, characterized by: The top of the drain hopper (13) is fixedly connected with a protective plate (7); and the top of the protective plate (7) is higher than the bottom of the drain pipe (12).

7. The drain for a backflow preventer according to claim 5, characterized by: The baffle (6) is made of stainless steel.

Images