Assembled check valve convenient to install

Abstract

The utility model relates to the technical field of flue check valves, and discloses an assembled check valve convenient to mount, which comprises a mounting plate, and is characterized in that the inner side of the mounting plate is fixedly connected with a sleeve, the upper side of the inner wall of the sleeve is fixedly connected with an upper fixing plate, and the lower side of the inner wall of the sleeve is fixedly connected with a lower fixing plate; the flue check valve comprises an upper fixing plate and a lower fixing plate, two butterfly valves which are arranged in pairs are rotatably connected between the upper fixing plate and the lower fixing plate, a sealing mechanism is arranged on one side of each butterfly valve, and an elastic reset mechanism is arranged on the other side of each butterfly valve. Meanwhile, the smoke inlet pipe and the smoke exhaust pipe are arranged on the outer side of the sleeve in a sleeving mode, the decoupling capacity of all parts is high, and therefore when the check valve is newly decorated and installed, the effects that operation is simplified, and installation is convenient are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue check valves, in particular to an assembled check valve which is easy to install. Background Art

[0002] The flue check valve can effectively prevent the smoke in the public flue from flowing back into the room, which is of great significance for preventing oil smoke from flowing back into the kitchen or other living areas and keeping the indoor air fresh. However, after the check valve has been used for a period of time, dust accumulation, aging of parts and other factors will cause the air tightness of the butterfly valve to decrease, and the smoke blocking ability of the public flue will also decrease accordingly. At this time, the flue check valve needs to be manually disassembled, cleaned or parts replaced. However, the overall integration of the existing flue check valve is relatively high, and the decoupling between the various parts is poor, which makes installation and disassembly very inconvenient. In view of this, an assembled check valve that is easy to install is proposed. Utility Model Content

[0003] In order to solve the technical problem of flue check valves, the utility model provides an assembled check valve that is easy to install.

[0004] The utility model is implemented by the following technical solution: an assembled check valve that is easy to install, comprising a mounting plate, a sleeve fixedly connected to the inner side of the mounting plate, an upper fixing plate fixedly connected to the upper side of the inner wall of the sleeve, a lower fixing plate fixedly connected to the lower side of the inner wall of the sleeve, two paired butterfly valves rotatably connected between the upper fixing plate and the lower fixing plate, a sealing mechanism being provided on one side of the two butterfly valves, and an elastic reset mechanism being provided on the other side of the butterfly valves.

[0005] As a further improvement of the above solution, the sealing mechanism includes a sealing retaining ring fixedly connected to the inner side of the sleeve, and a through groove formed on the sealing retaining ring matches the contours of the two butterfly valves.

[0006] As a further improvement of the above solution, a filter screen is fixedly connected to a side of the sealing retaining ring away from the butterfly valve.

[0007] As a further improvement of the above-mentioned solution, the elastic reset mechanism includes a limiting rod fixedly connected between the upper fixed plate and the lower fixed plate, and a torsion spring is sleeved on the limiting rod. One end of the torsion spring is fixedly connected to one side of one of the butterfly valves, and the other end of the torsion spring is fixedly connected to one side of the other butterfly valve.

[0008] As a further improvement of the above solution, a side of the mounting plate close to the filter screen is fixedly connected to a smoke inlet pipe.

[0009] As a further improvement of the above solution, a smoke exhaust pipe is fixedly connected to one side of the mounting plate close to the butterfly valve.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. The core parts of the flue check valve of this utility model are all installed in the sleeve, and the sleeve is fixed inside the mounting plate. At the same time, the smoke inlet pipe and the smoke exhaust pipe are both sleeved outside the sleeve. The decoupling ability of each part is strong, so when the check valve is installed in a new renovation, the operation is simplified and the installation is convenient.

[0012] 2. When the flue check valve of the present invention breaks down and needs to be replaced or cleaned, all key parts on the check valve can be checked one by one by pulling out the inside of the mounting plate, and then the parts can be replaced very conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of an assembled check valve that is easy to install provided by the utility model;

[0014] Figure 2 for Figure 1 Front view of

[0015] Figure 3 for Figure 1 Side view of

[0016] Figure 4 for Figure 1 Schematic diagram of the explosion structure;

[0017] Figure 5 for Figure 1 A schematic diagram of the overall structure of the middle casing (1);

[0018] Figure 6 for Figure 1 Schematic diagram of the overall structure of the middle butterfly valve (8).

[0019] Description of main symbols:

[0020] 1. Smoke inlet pipe; 2. Casing; 3. Mounting plate; 4. Smoke exhaust pipe; 5. Filter; 6. Lower fixing plate; 7. Upper fixing plate; 8. Butterfly valve; 9. Torsion spring; 10. Limit rod; 11. Sealing ring. DETAILED DESCRIPTION

[0021] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0022] Example:

[0023] Please combine Figures 1-6The present embodiment is an assembled check valve that is easy to install, including a mounting plate 3, a sleeve 2 is fixedly connected to the inner side of the mounting plate 3, an upper fixing plate 7 is fixedly connected to the upper side of the inner wall of the sleeve 2, and a lower fixing plate 6 is fixedly connected to the lower side of the inner wall of the sleeve 2. Two paired butterfly valves 8 are rotatably connected between the upper fixing plate 7 and the lower fixing plate 6. A sealing mechanism is provided on one side of the two butterfly valves 8, and an elastic reset mechanism is provided on the other side of the butterfly valves 8.

[0024] Please combine Figure 5 As shown, the sealing mechanism includes a sealing ring 11 fixedly connected to the inner side of the sleeve 2. The sealing ring 11 is separated by a horizontal plate in the middle, and the edge protrudes from the inner wall surface of the pipeline. The through groove opened on the sealing ring 11 fits the contour of the two butterfly valves 8.

[0025] Please combine Figure 2 As shown, a filter screen 5 is fixedly connected to the side of the sealing retaining ring 11 away from the butterfly valve 8, and the filter screen 5 is attached to the outer surface of the sealing retaining ring 11 facing the range hood.

[0026] Please combine Figure 3 As shown, the elastic reset mechanism includes a limit rod 10 fixedly connected between the upper fixed plate 7 and the lower fixed plate 6, and a torsion spring 9 is sleeved on the limit rod 10. One end of the torsion spring 9 is fixedly connected to one side of one of the butterfly valves 8, and the other end of the torsion spring 9 is fixedly connected to one side of the other butterfly valve 8. Corresponding limit blocks are provided at the abutment between the torsion spring 9 and the two butterfly valves 8.

[0027] Please combine Figure 1 As shown, the side of the mounting plate 3 close to the filter screen 5 is fixedly connected to the smoke inlet pipe 1.

[0028] Please combine Figure 1 As shown, a smoke exhaust pipe 4 is fixedly connected to one side of the mounting plate 3 close to the butterfly valve 8 .

[0029] The implementation principle of an easy-to-install assembled check valve in the embodiment of the present application is as follows: the user directly connects the air hood duct of the range hood with the smoke inlet pipe 1. When the range hood is started, the smoke passes through the filter 5 under the actuation of the range hood fan, and then the fluid force pushes the two butterfly valves 8 to open outward. At this time, the torsion spring 9 is deformed to generate elastic force, and the smoke can be discharged from the smoke exhaust pipe 4 through the opened butterfly valve 8. When the range hood is stopped, the torsion spring 9 rebounds and closes the butterfly valve 8 again at the sealing retaining ring 11.

[0030] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. An assembled check valve that is easy to install, comprising a mounting plate (3), characterized in that: The inner side of the mounting plate (3) is fixedly connected to a sleeve (2), the upper side of the inner wall of the sleeve (2) is fixedly connected to an upper fixing plate (7), the lower side of the inner wall of the sleeve (2) is fixedly connected to a lower fixing plate (6), and two paired butterfly valves (8) are rotatably connected between the upper fixing plate (7) and the lower fixing plate (6), one side of the two butterfly valves (8) is provided with a sealing mechanism, and the other side of the butterfly valves (8) is provided with an elastic reset mechanism.

2. The easy-to-install assembled check valve according to claim 1, characterized in that: The sealing mechanism comprises a sealing retaining ring (11) fixedly connected to the inner side of the sleeve (2), and a through groove provided on the sealing retaining ring (11) is matched with the contours of the two butterfly valves (8).

3. The easy-to-install assembled check valve according to claim 2, characterized in that: A filter screen (5) is fixedly connected to the side of the sealing retaining ring (11) away from the butterfly valve (8).

4. The easy-to-install assembled check valve according to claim 1, characterized in that: The elastic reset mechanism comprises a limiting rod (10) fixedly connected between the upper fixing plate (7) and the lower fixing plate (6), a torsion spring (9) being sleeved on the limiting rod (10), one end of the torsion spring (9) being fixedly connected to one side of one of the butterfly valves (8), and the other end of the torsion spring (9) being fixedly connected to one side of the other butterfly valve (8).

5. The easy-to-install assembled check valve according to claim 3, characterized in that: A side of the mounting plate (3) close to the filter screen (5) is fixedly connected to a smoke inlet pipe (1).

6. The easy-to-install assembled check valve according to claim 1, characterized in that: A smoke exhaust pipe (4) is fixedly connected to one side of the mounting plate (3) close to the butterfly valve (8).

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