Backflow prevention valve

Abstract

The utility model discloses an anti-backflow valve, which comprises a discharge end valve assembly, an input end valve assembly, an output end valve assembly and an output end valve assembly, the elastic non-return assembly is arranged in the discharge end valve assembly, a fixing bolt penetrates through an elastic piece installation through hole from the outer side of a discharge installation cabin and is screwed into an elastic non-return base screw hole, and then the elastic non-return assembly and the discharge end valve assembly can be fixedly installed; fixing bolts penetrate through fixing piece mounting through holes from the outer side of the input mounting cabin and are screwed into fixed check ring screw holes, so that the fixed check assembly and the input end valve assembly can be fixedly mounted, and the discharge end valve assembly and the input end valve assembly are fixedly mounted through a discharge connecting flange and an input connecting flange; by means of the structure, the whole valve can be conveniently disassembled and assembled, the internal structure can be conveniently overhauled, or disassembly, assembly, replacement and use are more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve equipment technical field, concretely is a kind of anti-backflow valve. BACKGROUND

[0002] Anti-backflow valve, also known as check valve, one-way valve or non-return valve, is a device for preventing fluid from flowing in reverse in a pipeline, and is a kind of automatic valve widely used in industry, municipal water supply, fire protection system, chemical industry and other fluid control systems;

[0003] Anti-backflow valve can ensure that fluid can only flow in one direction, prevent backflow and reverse flow, but the existing anti-backflow valve cannot be conveniently disassembled, replaced and overhauled when internal failure occurs during use, and is inconvenient to use. UTILITY MODEL CONTENT

[0004] The utility model aims at: in order to solve the problem that the existing anti-backflow valve cannot be conveniently disassembled, replaced and overhauled when internal failure occurs during use, and is inconvenient to use, provide a kind of anti-backflow valve.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an anti-backflow valve, comprising: a discharge end valve assembly, the discharge end valve assembly is provided with an input end valve assembly at one end, a elastic check assembly is fixedly arranged at one end inside the discharge end valve assembly, and a fixed check assembly is fixedly arranged at one end inside the input end valve assembly.

[0006] As a further scheme of the utility model: the discharge end valve assembly comprises a discharge outer mounting flange, the discharge outer mounting flange is penetratingly and fixedly connected with a discharge connecting pipe at one end, the discharge connecting pipe is penetratingly and fixedly connected with a discharge mounting seat cabin at one end, the discharge mounting seat cabin is penetratingly and fixedly connected with a discharge connecting flange at one end, and an elastic member mounting through hole is penetratingly and formed at one end inside the discharge mounting seat cabin.

[0007] As a further scheme of the utility model: the input end valve assembly comprises an input outer mounting flange, the input outer mounting flange is penetratingly and fixedly connected with an input connecting pipe at one end, the input connecting pipe is penetratingly and fixedly connected with an input mounting seat cabin at one end, the input mounting seat cabin is penetratingly and fixedly connected with an input connecting flange at one end, and a fixing member mounting through hole is penetratingly and formed at one end inside the input mounting seat cabin.

[0008] As a further scheme of the utility model: the elastic check assembly comprises a sealing washer part one, the sealing washer part one is provided with an elastic check seat part at one end, the elastic check seat part is movably inserted with an elastic check piston part at one end, and a reset elastic member is sleeved between the elastic check seat part and the elastic check piston part.

[0009] As a further scheme of the utility model: the fixed check assembly contains sealing washer part two, sealing washer part two one end is provided with fixed check ring part, sealing washer part two specification model is same with sealing washer part one.

[0010] As a further scheme of the utility model: the sealing washer part one contains sealing washer body, the sealing washer body inside is passed through and is opened pad ring through -hole, the pad ring through -hole is opened and is located in the sealing washer body inside surrounds even opening.

[0011] As a further scheme of the utility model: the elastic check seat part contains elastic check seat body, the elastic check seat body inside is opened and is arranged drain through -groove, the elastic check seat body one end outside inside is opened and is arranged elastic check seat screw hole, the elastic check seat body other end middle is fixed and is arranged limit insert sleeve, the drain through -groove is opened and is arranged three groups, the elastic check seat screw hole is opened and is arranged multiple and is adapted pad ring through -hole and elastic piece installation through -hole.

[0012] As a further scheme of the utility model: the elastic check piston part contains taper trapezoidal piston seat, the taper trapezoidal piston seat one end middle is fixed and is arranged limit insert rod, the limit insert rod is adapted and is inserted in limit insert sleeve inside.

[0013] As a further scheme of the utility model: the fixed check ring part contains fixed check ring body, the fixed check ring body one end inside is opened and is arranged annular inclined surface, the fixed check ring body other end inside is opened and is arranged fixed check ring screw hole, the annular inclined surface is adapted taper trapezoidal piston seat, the fixed check ring screw hole is opened and is arranged multiple and is adapted fixed piece installation through -hole.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] In the utility model, the elastic check assembly is placed into the drain end valve assembly, is aligned with the elastic check seat screw hole and the elastic piece installation through -hole, the fixed bolt is penetrated through the elastic piece installation through -hole from the outside of the drain installation seat cabin and is screwed into the elastic check seat screw hole, the elastic check assembly and the drain end valve assembly are fixed and installed, the fixed check assembly is placed into the input end valve assembly, is aligned with the fixed check ring screw hole and the fixed piece installation through -hole, the fixed bolt is penetrated through the fixed piece installation through -hole from the outside of the input installation seat cabin and is screwed into the fixed check ring screw hole, the fixed check assembly and the input end valve assembly are fixed and installed, then the drain end valve assembly and the input end valve assembly are fixed and installed through the drain connection flange and the input connection flange, the structure can conveniently disassemble the valve as a whole, and can conveniently overhaul or disassemble and replace the internal structure, which is more convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a whole structure schematic diagram of the anti-backflow valve;

[0017] Figure 2 is an installation structure schematic diagram of the discharge end valve assembly and the elastic check assembly in the anti-backflow valve;

[0018] Figure 3 is an installation structure schematic diagram of the input end valve assembly and the fixed check assembly in the anti-backflow valve;

[0019] Figure 4 is a structure schematic diagram of the discharge end valve assembly in the anti-backflow valve;

[0020] Figure 5 is a structure schematic diagram of the input end valve assembly in the anti-backflow valve;

[0021] Figure 6 is a structure schematic diagram of the elastic check assembly in the anti-backflow valve;

[0022] Figure 7 is a structure schematic diagram of the fixed check assembly in the anti-backflow valve;

[0023] Figure 8 is a structure schematic diagram of the sealing washer part one in the anti-backflow valve;

[0024] Figure 9 is a structure schematic diagram of the elastic check seat part in the anti-backflow valve;

[0025] Figure 10 is a structure schematic diagram of the elastic check piston part in the anti-backflow valve;

[0026] Figure 11 is a structure schematic diagram of the fixed check ring part in the anti-backflow valve.

[0027] In the figure: 1, the discharge end valve assembly; 2, the input end valve assembly; 3, the elastic check valve assembly; 5, the fixed check valve assembly; 10, the discharge outer mounting flange; 11, the discharge connecting pipe; 12, the discharge mounting seat cabin; 13, the discharge connecting flange; 14, the elastic member mounting through hole; 20, the input outer mounting flange; 21, the input connecting pipe; 22, the input mounting seat cabin; 23, the input connecting flange; 24, the fixed member mounting through hole; 30, the sealing washer component one; 31, the elastic check valve seat component; 32, the elastic check valve piston component; 33, the reset elastic member; 50, the sealing washer component two; 51, the fixed check valve ring component; 301, the sealing washer body; 302, the washer through hole; 303, the elastic check valve seat body; 304, the discharge through slot; 305, the elastic check valve seat screw hole; 306, the limiting insert sleeve; 307, the tapered trapezoidal piston seat; 308, the limiting insert rod; 501, the fixed check valve ring body; 502, the annular inclined surface; 503, the fixed check valve ring screw hole. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] In the description of the utility model, it should be explained that the orientation or position relation indicated by the terms 'center', 'upper', 'lower', 'left', 'right','vertical', 'horizontal', 'inner', 'outer' and the like is the orientation or position relation based on the orientation or position relation shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms 'first','second', 'third' are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms'mounting', 'connection', 'connecting','setting' should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. The embodiments of the utility model will be described below according to the overall structure of the utility model.

[0030] REFERENCE Figures 1 to 3The utility model discloses an anti -back flow valve, include: the valve assembly 1 of discharging end, the valve assembly 2 of input end is provided with one end of valve assembly 1 of discharging end, the elastic check valve assembly 3 is fixedly arranged to one end inside valve assembly 1 of discharging end, the fixed check valve assembly 5 is fixedly arranged to one end inside valve assembly 2 of input end.

[0031] Referring to Figure 4 , the valve assembly 1 of discharging end includes a discharge outer mounting flange 10, a discharge connecting pipe 11 is fixedly connected through one end of the discharge outer mounting flange 10, a discharge mounting seat cabin 12 is fixedly connected through one end of the discharge connecting pipe 11, a discharge connecting flange 13 is fixedly connected through one end of the discharge mounting seat cabin 12, and an elastic element mounting through hole 14 is formed through one end inside the discharge mounting seat cabin 12.

[0032] Referring to Figure 5 , the valve assembly 2 of input end includes an input outer mounting flange 20, an input connecting pipe 21 is fixedly connected through one end of the input outer mounting flange 20, an input mounting seat cabin 22 is fixedly connected through one end of the input connecting pipe 21, an input connecting flange 23 is fixedly connected through one end of the input mounting seat cabin 22, and a fixed element mounting through hole 24 is formed through one end inside the input mounting seat cabin 22.

[0033] Referring to Figure 6 , Figure 8 , Figure 9 and Figure 10 , the elastic check valve assembly 3 includes a sealing gasket component one 30, the sealing gasket component one 30 is provided with an elastic check seat component 31 at one end, the elastic check seat component 31 movably inserts an elastic check piston component 32 at one end, a reset elastic element 33 is sleeved between the elastic check seat component 31 and the elastic check piston component 32, the sealing gasket component one 30 includes a sealing gasket body 301, a gasket through hole 302 is formed through inside the sealing gasket body 301, the gasket through hole 302 is formed with multiple groups of uniform gasket through holes 302 inside the sealing gasket body 301, the elastic check seat component 31 includes an elastic check seat body 303, an outlet through slot 304 is formed inside the elastic check seat body 303, an elastic check seat screw hole 305 is formed inside the outer side of one end of the elastic check seat body 303, a limiting insert sleeve 306 is fixedly arranged in the middle of the other end of the elastic check seat body 303, the outlet through slot 304 is formed with three groups, the elastic check seat screw hole 305 is formed with multiple groups and is matched with the elastic element mounting through hole 14 and the gasket through hole 302, the elastic check piston component 32 includes a tapered trapezoidal piston seat 307, a limiting insertion rod 308 is fixedly arranged in the middle of one end of the tapered trapezoidal piston seat 307, and the limiting insertion rod 308 is matched with the inside of the limiting insert sleeve 306.

[0034] The elastic check assembly 3 is placed into the discharge end valve assembly 1, and is aligned with the elastic check seat screw hole 305 and the elastic piece mounting hole 14, at this time, the fixing screw is screwed into the elastic check seat screw hole 305 from the outside of the discharge mounting seat cabin 12 through the elastic piece mounting hole 14, so that the elastic check assembly 3 and the discharge end valve assembly 1 are fixed and installed.

[0035] Referring to Figure 7 And Figure 11 The fixed check assembly 5 comprises a sealing washer component two 50, and the sealing washer component two 50 is provided with a fixed check ring component 51 at one end, and the sealing washer component two 50 is of the same specification and model as the sealing washer component one 30, and the fixed check ring component 51 comprises a fixed check ring body 501, the inner side of one end of the fixed check ring body 501 is provided with an annular inclined surface 502, and the inner side of the other end of the fixed check ring body 501 is provided with a fixed check ring screw hole 503, and the annular inclined surface 502 is adapted to the tapered trapezoidal piston seat 307, and a plurality of groups of fixed piece mounting holes 24 are provided in the fixed check ring screw hole 503.

[0036] The above scheme is adopted: the fixed check assembly 5 is placed into the input end valve assembly 2, and is aligned with the fixed check ring screw hole 503 and the fixed piece mounting hole 24, at this time, the fixing screw is screwed into the fixed check ring screw hole 503 from the outside of the input mounting seat cabin 22 through the fixed piece mounting hole 24, so that the fixed check assembly 5 and the input end valve assembly 2 are fixed and installed.

[0037] The working principle of the utility model is: when in use, the elastic check assembly 3 is placed into the discharge end valve assembly 1, and is aligned with the elastic check seat screw hole 305 and the elastic piece mounting hole 14, at this time, the fixing screw is screwed into the elastic check seat screw hole 305 from the outside of the discharge mounting seat cabin 12 through the elastic piece mounting hole 14, so that the elastic check assembly 3 and the discharge end valve assembly 1 are fixed and installed, the fixed check assembly 5 is placed into the input end valve assembly 2, and is aligned with the fixed check ring screw hole 503 and the fixed piece mounting hole 24, at this time, the fixing screw is screwed into the fixed check ring screw hole 503 from the outside of the input mounting seat cabin 22 through the fixed piece mounting hole 24, so that the fixed check assembly 5 and the input end valve assembly 2 are fixed and installed, then the discharge end valve assembly 1 and the input end valve assembly 2 are fixed and installed through the discharge connecting flange 13 and the input connecting flange 23, at this time, the elastic check piston component 32 is pushed out to fit the annular inclined surface 502 by the reset elastic piece 33 to complete the one-way anti-backflow, so that the structure can conveniently disassemble and assemble the valve as a whole, and can conveniently overhaul or disassemble and replace the internal structure, and is more convenient to use.

[0038] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A backflow prevention valve, characterized by, Include: The discharge end valve assembly (1) is provided with an input end valve assembly (2) at one end, the discharge end valve assembly (1) is fixedly provided with a elastic check valve assembly (3) at one end inside, the input end valve assembly (2) is fixedly provided with a fixed check valve assembly (5) at one end inside, the discharge end valve assembly (1) contains a discharge outer mounting flange (10), one end of the discharge outer mounting flange (10) is penetratingly and fixedly connected with a discharge connecting pipe (11), one end of the discharge connecting pipe (11) is penetratingly and fixedly connected with a discharge mounting seat cabin (12), one end of the discharge mounting seat cabin (12) is penetratingly and fixedly connected with a discharge connecting flange (13), one end inside of the discharge mounting seat cabin (12) is penetratingly and set with an elastic element mounting through hole (14), the input end valve assembly (2) contains an input outer mounting flange (20), one end of the input outer mounting flange (20) is penetratingly and fixedly connected with an input connecting pipe (21), one end of the input connecting pipe (21) is penetratingly and fixedly connected with an input mounting seat cabin (22), one end of the input mounting seat cabin (22) is penetratingly and fixedly connected with an input connecting flange (23), one end inside of the input mounting seat cabin (22) is penetratingly and set with a fixed element mounting through hole (24), the elastic check valve assembly (3) contains a sealing washer component one (30), one end of the sealing washer component one (30) is provided with an elastic check valve seat component (31), one end of the elastic check valve seat component (31) is movably inserted with an elastic check valve piston component (32), the elastic check valve seat component (31) and the elastic check valve piston component (32) are sleeved with a reset elastic element (33), the fixed check valve assembly (5) contains a sealing washer component two (50), one end of the sealing washer component two (50) is provided with a fixed check valve ring component (51), the sealing washer component two (50) is same in specification and model with the sealing washer component one (30), the elastic check valve seat component (31) contains an elastic check valve seat body (303), the elastic check valve seat body (303) is internally set with a discharge slot (304), one end outside of the elastic check valve seat body (303) is internally set with an elastic check valve seat screw hole (305), the other end of the elastic check valve seat body (303) is fixedly provided with a limiting insert sleeve (306) in the middle, the discharge slot (304) is set with three groups, the elastic check valve seat screw hole (305) is set with multiple groups and is adapted to the elastic element mounting through hole (14) and the washer through hole (302), the fixed check valve ring component (51) contains a fixed check valve ring body (501), one end inside of the fixed check valve ring body (501) is set with an annular inclined surface (502), the other end inside of the fixed check valve ring body (501) is set with a fixed check valve ring screw hole (503), the annular inclined surface (502) is adapted to the tapered trapezoidal piston seat (307), the fixed check valve ring screw hole (503) is set with multiple groups and is adapted to the fixed element mounting through hole (24).

2. A backflow preventer according to claim 1, wherein The sealing gasket component one (30) comprises a sealing gasket body (301), a gasket through hole (302) is arranged in the sealing gasket body (301), and a plurality of groups of gasket through holes (302) are evenly arranged around the sealing gasket body (301).

3. A backflow preventer according to claim 1, wherein The elastic check piston component (32) comprises a tapered piston seat (307), a limiting plug (308) is fixedly arranged in the middle of one end of the tapered piston seat (307), and the limiting plug (308) is adapted to be inserted into the limiting plug sleeve (306).

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