Check valve

Abstract

The check valve comprises a valve body, a valve plate door, a rotating mechanism and a locking mechanism, the valve plate door is arranged at the lower end of the valve body, the locking mechanism is arranged on one side in the valve body, the bottom of the locking mechanism is connected and matched with the valve plate door, and the rotating mechanism is arranged on the other side in the valve body. The bottom of the rotating mechanism is connected with the valve plate door; according to the check valve, the rotating mechanism and the locking mechanisms are arranged, the rotating mechanism can drive the valve plate door to rotate to be closed so that closing of the check valve can be achieved, the locking mechanisms are arranged on the valve body and the valve plate door respectively, after the valve plate door is closed, the locking mechanisms can tightly lock the valve plate door, and therefore the valve plate door can be closed firmly, and the check valve is convenient to use. The check valve has the advantages that gaps caused by impact of airflow can be avoided, so that the check valve is locked under the action of the spring bolt when a fire disaster occurs, the fire disaster in a public exhaust passage or an indoor fire disaster can be effectively isolated, and the conditions of slow fire disaster delay, smoke leakage and the like can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of check valves, in particular to a check valve. Background Art

[0002] The check valve integrates three functions of fire prevention, non-return and diversion, and is an important part of the residential exhaust duct system. The existing check valve used in the residential kitchen exhaust duct is used to achieve its fire prevention function, ensure the safety of the residence, and prevent the spread of fire; and to ensure the health and comfort of the residence, prevent smoke and odor from flowing into the residence;

[0003] When the check valve is normally used, the exhaust port is open to facilitate smoke exhaust and pressure relief. Once a fire occurs, the valve plate of the check valve will be closed. However, after the existing check valve is closed, the valve plate cannot be fixed. The spring of the switch valve plate is used to give the valve plate a force to make it close to the check valve. However, this is not tight, which will cause smoke leakage and fire spread.

[0004] Therefore, a check valve is urgently needed to solve the technical problems described above. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned technology and provide a check valve.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is a check valve, comprising:

[0007] A valve body, a valve plate door, a rotating mechanism and a locking mechanism. The lower end of the valve body is provided with a valve plate door, one side of the valve body is provided with a locking mechanism, the bottom of the locking mechanism is connected and cooperated with the valve plate door, and the other side of the valve body is provided with a rotating mechanism, the bottom of the rotating mechanism is connected to the valve plate door.

[0008] As an improvement, the rotating mechanism includes a U-shaped seat, a fixed frame, a connecting frame, a torsion spring, a push frame and a temperature sensing element, the U-shaped seat is arranged on the inner wall of the valve body, the U-shaped seat is provided with a first screw, the first screw is sleeved with a torsion spring, one end of the torsion spring is provided with a push rod, one side of the torsion spring on the first screw is provided with a push frame, the lower end of the push frame is provided with a first notch, the push rod is located in the first notch, the push frame is provided with a cross bar, the first screw is provided with a connecting frame, the other end of the connecting frame is connected to the valve plate door, the cross bar extends into the connecting frame and cooperates with the connecting frame, a fixed frame is provided in the middle of the U-shaped seat, a second notch is provided on one side of the fixed frame, the other end of the torsion spring is located in the second notch, a temperature sensing element is provided on the fixed frame, one end of the temperature sensing element is located above the push frame and cooperates with the push frame.

[0009] As an improvement, a mounting frame is provided on the outside of the valve body, the mounting frame is connected to the valve body and the U-shaped seat through bolts, and undercut teeth are provided on the mounting frame.

[0010] As an improvement, the locking mechanism includes a base plate, an upper frame, a V-shaped spring, a V-shaped frame, mounting bolts and a low-temperature control ring, the base plate being arranged at the bottom of the valve body, a mounting bolt being arranged above the base plate on the inner wall of the valve body, an upper frame being arranged on the mounting bolt, a first screw hole being symmetrically arranged on the upper frame, the lower end of the first screw hole extending to the base plate, a fixing bolt being arranged in the first screw hole, a locking tongue being rotatably arranged on one of the fixing bolts, a V-shaped spring being arranged on the other fixing bolt, one end of the V-shaped spring abutting against the locking tongue, and the other end of the V-shaped spring abutting against the upper frame, a hole being arranged in the middle of the upper frame, the hole extending to the base plate, a low-temperature control ring being arranged in the hole, the low-temperature control ring and the V-shaped spring cooperating, the V-shaped frame being arranged on the valve plate door, a slot being arranged on the V-shaped frame, the locking tongue and the slot cooperating.

[0011] As an improvement, a second screw hole is provided in the middle of the mounting bolt, a second screw rod is provided in the second screw hole, and a butterfly nut is provided at one end of the second screw rod.

[0012] As an improvement, a connecting sleeve is provided at the upper end of the valve body.

[0013] As an improvement, a sealing ring cooperating with the valve plate door is provided at the lower end of the valve body.

[0014] The advantages of the present invention compared with the prior art are:

[0015] 1. It is equipped with a rotating mechanism and a locking mechanism. The rotating mechanism can drive the valve door to rotate and close, thereby realizing the closing of the check valve. The locking mechanism is respectively arranged on the valve body and the valve door. When the valve door is closed, the locking mechanism can tightly lock the valve door, so that the valve door will be closed more firmly and no gap will appear due to the impact of airflow. In this way, when a fire occurs, the check valve is locked under the action of the lock tongue, effectively isolating the fire in the public exhaust duct or the fire in the room, and will not cause the fire to be delayed or the smoke to leak, etc.

[0016] 2. The locking mechanism includes a V-shaped spring, a V-shaped frame and a low-temperature control ring. Normally, the low-temperature control ring will press against the lock tongue to limit the rotation of the lock tongue. When the temperature is relatively high, the low-temperature control ring will melt, and the lock tongue will rotate under the action of the V-shaped spring and then insert into the slot on the V-shaped frame to lock the valve door, thereby making the valve door more tightly closed;

[0017] 3. A connecting sleeve is provided on the upper end of the valve body for better connection and installation;

[0018] 4. A sealing ring is provided at the lower end of the valve body to cooperate with the valve plate door, which further makes the check valve close more tightly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a side view of a check valve of the present invention.

[0020] Figure 2 It is a top view of a three-dimensional structure of a check valve of the present invention.

[0021] Figure 3 It is a schematic diagram of a three-dimensional structure of a check valve of the present invention when viewed from above.

[0022] Figure 4 It is a schematic structural diagram of a check valve of the present invention after the connecting sleeve is disassembled.

[0023] Figure 5 It is a schematic diagram of the internal structure of a check valve of the present invention.

[0024] Figure 6 It is a schematic diagram of a disassembled state of a check valve of the present invention.

[0025] Figure 7 It is a structural schematic diagram of a check valve rotating mechanism of the present invention.

[0026] Figure 8 It is a schematic diagram of a disassembled state of a check valve locking mechanism of the present invention.

[0027] Fig. 9 yes Figure 5 A partial enlarged view of point A in the middle.

[0028] As shown in the figure:

[0029] 100. Valve body; 101. Connecting sleeve; 102. Sealing ring; 200. Valve plate door; 301. U-shaped seat; 302. Fixing frame; 303. Connecting frame; 304. Torsion spring; 305. Pushing frame; 306. Temperature sensing element; 307. First screw; 308. Pushing rod; 309. First notch; 310. Cross bar; 311. Second notch; 312. Mounting frame; 313. Undercut tooth; 401. Bottom plate; 402. Upper frame; 403. V-shaped spring; 404. V-shaped frame; 405. Mounting bolt; 406. Low temperature control ring; 407. First screw hole; 408. Fixing bolt; 409. Lock tongue; 410. Hole; 411. Slot; 412. Second screw hole; 413. Second screw; 414. Butterfly nut. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Combined with Figure 1-9 , a check valve, comprising:

[0032] A valve body 100, a valve door 200, a rotating mechanism and a locking mechanism. The valve door 200 is provided at the lower end of the valve body 100, a locking mechanism is provided on one side of the valve body 100, and the bottom of the locking mechanism is connected to the valve door 200. A rotating mechanism is provided on the other side of the valve body 100, and the bottom of the rotating mechanism is connected to the valve door 200, so as to automatically adjust the position of the valve door 200 when the temperature changes.

[0033] The rotating mechanism includes a U-shaped seat 301, a fixing frame 302, a connecting frame 303, a torsion spring 304, a push frame 305 and a temperature sensing element 306. The U-shaped seat 301 is arranged on the inner wall of the valve body 100. A first screw 307 is arranged on the U-shaped seat 301. A torsion spring 304 is sleeved on the first screw 307. A push rod 308 is arranged at one end of the torsion spring 304. A push frame 305 is arranged on one side of the torsion spring 304 on the first screw 307. A first notch 309 is arranged at the lower end of the push frame 305. The push rod 308 is located in the first notch 309. A cross bar 310 is arranged on the push frame 305. A connecting frame 303 is arranged on the first screw 307. The other end of the connecting frame 303 is connected to the valve plate door 200. Then, the cross bar 310 extends into the connecting frame 303 and cooperates with the connecting frame 303. A fixing frame 302 is provided in the middle of the U-shaped seat 301, and a second notch 311 is provided on one side of the fixing frame 302. The other end of the torsion spring 304 is located in the second notch 311, which is used to provide a rotational force for the valve door 200. A temperature sensing element 306 is provided on the fixing frame 302, and one end of the temperature sensing element 306 is located above the push frame 305 and cooperates with the push frame 305. When the temperature changes, the temperature sensing element 306 will shrink and shorten, thereby releasing the restriction on the push frame 305. The push frame 305 will rotate upward under the action of the torsion spring 304, and the cross bar 310 will then push the connecting frame 303 to rotate, thereby driving the valve door 200 to close.

[0034] A mounting frame 312 is disposed outside the valve body 100 . The mounting frame 312 is connected to the valve body 100 and the U-shaped seat 301 through bolts. An undercut tooth 313 is disposed on the mounting frame 312 .

[0035] The locking mechanism includes a bottom plate 401, an upper frame 402, a V-shaped spring 403, a V-shaped frame 404, a mounting bolt 405 and a low-temperature control ring 406. The bottom plate 401 is arranged at the bottom of the valve body 100. A mounting bolt 405 is arranged above the bottom plate 401 on the inner wall of the valve body 100. The mounting bolt 405 is provided with an upper frame 402. The upper frame 402 is symmetrically provided with first screw holes 407. The lower end of the first screw hole 407 extends to the bottom plate 401. A fixing bolt 408 is arranged in the first screw hole 407. A locking tongue 409 is rotatably provided on one of the fixing bolts 408. Another fixing bolt 408 is provided with a V-shaped spring 403, one end of the V-shaped spring 403 is against the locking tongue 409, providing a force for the locking tongue 409 to rotate, and the other end of the V-shaped spring 403 is against the upper frame 402, and a hole 410 is provided in the middle of the upper frame 402, and the hole 410 extends to the bottom plate 401, and a low-temperature control ring 406 is provided in the hole 410, and the low-temperature control ring 406 cooperates with the V-shaped spring 403, and the V-shaped frame 404 is set on the valve door 200, and a slot 411 is provided on the V-shaped frame 404, and the locking tongue 409 cooperates with the slot 411.

[0036] A second screw hole 412 is disposed in the middle of the mounting bolt 405 . A second screw rod 413 is disposed in the second screw hole 412 . A butterfly nut 414 is disposed at one end of the second screw rod 413 .

[0037] The upper end of the valve body 100 is provided with a connecting sleeve 101 to facilitate connecting the check valve to a pipeline system.

[0038] The lower end of the valve body 100 is provided with a sealing ring 102 that cooperates with the valve plate door 200 to enhance the sealing performance and prevent fluid leakage.

[0039] In the specific implementation of the present invention, during installation, the check valve is first connected to the pipeline system through the connecting sleeve 101.

[0040] Open the valve door 200 and place one end of the temperature sensing element 306 against the top of the push frame 305, so that the rotation of the push frame 305 can be restricted and the torsion spring 304 can be charged.

[0041] When the low temperature control ring 406 is activated for 20 seconds during the fire resistance, the restriction on the lock tongue 409 is released. Since one end of the V-shaped spring 403 is against the lock tongue 409, the lock tongue 409 is driven to rotate and pop out.

[0042] When the temperature control start time reaches 50-60 seconds, the temperature sensing element 306 will deform and shrink, thereby releasing the restriction on the push frame 305. At this time, the torsion spring 304 will rebound and reset, driving the push frame 305 to rotate through the push rod 308, and the cross bar 310 on the push frame 305 will drive the connecting frame 303 to rotate, thereby driving the valve door 200 to rotate and close, return to the original position, and the lock tongue 409 will slide into the slot 411 along the V-shaped frame 404, thereby locking the return of the valve door 200, thereby effectively ensuring the time limit of fire resistance;

[0043] The lower end of the valve body 100 is provided with a sealing ring 102 that cooperates with the valve plate door 200. The valve plate door 200 will abut against the sealing ring 102 to seal more tightly. In this way, when a fire occurs, the check valve is locked under the action of the lock tongue 409, effectively isolating the fire in the public exhaust duct or the fire in the room, and will not cause the fire to be delayed or the smoke to leak.

[0044] The set temperature of the temperature sensing element 306 can be adjusted according to actual needs to adapt to different working environments.

[0045] In the description of the embodiments of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0046] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0047] In the description of the embodiments of the present invention, "plurality" means at least 2.

[0048] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A check valve, characterized in that: include: A valve body (100), a valve plate door (200), a rotating mechanism and a locking mechanism, wherein the valve plate door (200) is provided at the lower end of the valve body (100), a locking mechanism is provided on one side of the valve body (100), the bottom of the locking mechanism is connected and cooperated with the valve plate door (200), and a rotating mechanism is provided on the other side of the valve body (100), the bottom of the rotating mechanism is connected to the valve plate door (200).

2. A check valve according to claim 1, characterized in that: The rotating mechanism comprises a U-shaped seat (301), a fixing frame (302), a connecting frame (303), a torsion spring (304), a pushing frame (305) and a temperature sensing element (306); the U-shaped seat (301) is arranged on the inner wall of the valve body (100); a first screw rod (307) is arranged on the U-shaped seat (301); a torsion spring (304) is sleeved on the first screw rod (307); a pushing rod (308) is arranged at one end of the torsion spring (304); a pushing frame (305) is arranged on one side of the torsion spring (304) on the first screw rod (307); a first notch (309) is arranged at the lower end of the pushing frame (305); the pushing rod (308) is located in the first notch (309); The push frame (305) is provided with a cross bar (310), the first screw rod (307) is provided with a connecting frame (303), the other end of the connecting frame (303) is connected to the valve plate door (200), the cross bar (310) extends into the connecting frame (303) and cooperates with the connecting frame (303), a fixing frame (302) is provided in the middle of the U-shaped seat (301), a second notch (311) is provided on one side of the fixing frame (302), the other end of the torsion spring (304) is located in the second notch (311), and a temperature sensing element (306) is provided on the fixing frame (302), one end of the temperature sensing element (306) is located above the push frame (305) and cooperates with the push frame (305).

3. A check valve according to claim 2, characterized in that: A mounting frame (312) is provided on the outside of the valve body (100), and the mounting frame (312) is connected to the valve body (100) and the U-shaped seat (301) via bolts. The mounting frame (312) is provided with undercut teeth (313).

4. A check valve according to claim 1, characterized in that: The locking mechanism comprises a bottom plate (401), an upper frame (402), a V-shaped spring (403), a V-shaped frame (404), a mounting bolt (405) and a low-temperature control ring (406), wherein the bottom plate (401) is arranged at the bottom of the valve body (100), a mounting bolt (405) is arranged above the bottom plate (401) on the inner wall of the valve body (100), an upper frame (402) is arranged on the mounting bolt (405), and the upper frame (402) is symmetrically provided with first screw holes (407), the lower ends of the first screw holes (407) extend to the bottom plate (401), and the first screw holes (407) are provided with fixing bolts (408), and one of the fixing bolts (408) is rotatably provided with a screw cap. A locking tongue (409), and another fixing bolt (408) is provided with a V-shaped spring (403), one end of the V-shaped spring (403) is against the locking tongue (409), and the other end of the V-shaped spring (403) is against the upper frame (402), a hole (410) is provided in the middle of the upper frame (402), and the hole (410) extends to the bottom plate (401), and a low-temperature control ring (406) is provided in the hole (410), and the low-temperature control ring (406) and the V-shaped spring (403) cooperate, the V-shaped frame (404) is set on the valve plate door (200), and a slot (411) is provided on the V-shaped frame (404), and the locking tongue (409) and the slot (411) cooperate.

5. A check valve according to claim 4, characterized in that: A second screw hole (412) is provided in the middle of the mounting bolt (405), a second screw rod (413) is provided in the second screw hole (412), and a butterfly nut (414) is provided at one end of the second screw rod (413).

6. A check valve according to claim 1, characterized in that: The upper end of the valve body (100) is provided with a connecting sleeve (101).

7. A check valve according to claim 1, characterized in that: The lower end of the valve body (100) is provided with a sealing ring (102) that cooperates with the valve plate door (200).

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