Check valve

Abstract

The utility model relates to the technical field of check valves, and particularly discloses a check valve which 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, the rotating mechanism is arranged on the other side in the valve body, and the valve plate door is arranged on the rotating mechanism. 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] This utility model relates to the field of check valve technology, specifically to a check valve. Background Technology

[0002] Check valves integrate three functions: fire prevention, backflow prevention, and flow diversion. They are an important component of residential exhaust systems. Existing check valves used in residential kitchen exhaust ducts are designed to achieve their fire prevention function, ensuring the safety of the residence and preventing the spread of fire; and to ensure the health and comfort of the residence and prevent the spread of smoke and odors.

[0003] When a check valve is in normal use, the exhaust port is open to facilitate smoke exhaust and pressure relief. In the event of a fire, the valve plate of the check valve will close. However, existing check valves cannot fix the valve plate after closing. Instead, the spring that switches the valve plate applies a force to make it stick to the check valve. However, this is not airtight and can lead to smoke leakage and the spread of fire.

[0004] Therefore, a check valve is urgently needed to address the technical problems described above. Utility Model Content

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

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is a check valve, comprising:

[0007] The valve body comprises a valve plate door, a rotating mechanism, and a locking mechanism. The valve plate door is located at the lower end of the valve body. A locking mechanism is located on one side of the valve body, and the bottom of the locking mechanism is connected to the valve plate door. A rotating mechanism is located on the other side of the valve body, and 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 disposed on the inner wall of the valve body. A first screw is provided on the U-shaped seat, and a torsion spring is sleeved on the first screw. A push rod is provided at one end of the torsion spring. A push frame is provided on one side of the torsion spring on the first screw. A first slot is provided at the lower end of the push frame. The push rod is located in the first slot. A crossbar is provided on the push frame. A connecting frame is provided on the first screw. The other end of the connecting frame is connected to the valve plate door. The crossbar 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 slot is provided on one side of the fixed frame. The other end of the torsion spring is located in the second slot. 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 bracket is provided on the outside of the valve body. The mounting bracket is connected to the valve body and the U-shaped seat by bolts, and the mounting bracket is provided with barbed teeth.

[0010] As an improvement, the locking mechanism includes a base plate, an upper frame, a V-shaped spring, a V-shaped bracket, mounting bolts, and a cryogenic control ring. The base plate is located at the bottom of the valve body. Mounting bolts are located above the base plate on the inner wall of the valve body. The upper frame is mounted on the mounting bolts. The upper frame has symmetrical first screw holes, the lower ends of which extend to the base plate. Fixing bolts are located in the first screw holes. A locking tongue is rotatably mounted on one of the fixing bolts, and a V-shaped spring is mounted on the other fixing bolt. One end of the V-shaped spring abuts against the locking tongue, and the other end abuts against the upper frame. A hole is located in the middle of the upper frame, extending to the base plate. A cryogenic control ring is located in the hole, and the cryogenic control ring cooperates with the V-shaped spring. The V-shaped bracket is mounted on the valve plate door, and a slot is located on the V-shaped bracket. The locking tongue cooperates with the slot.

[0011] As an improvement, the mounting bolt has a second screw hole in the middle, a second screw rod is provided in the second screw hole, and a wing 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, the lower end of the valve body is provided with a sealing ring that mates with the valve plate.

[0014] The advantages of this utility model compared with the prior art are as follows:

[0015] 1. It is equipped with a rotating mechanism and a locking mechanism. The rotating mechanism can drive the valve plate to rotate and close, thereby realizing the closure of the check valve. The locking mechanism is respectively set on the valve body and the valve plate. When the valve plate is closed, the locking mechanism will lock the valve plate tightly, so that the valve plate will be closed more firmly and will not have gaps due to the impact of airflow. In the event of a fire, the check valve is locked under the action of the locking tongue, effectively isolating fires in public exhaust ducts or indoor fires, and preventing fire from being delayed or smoke from leaking.

[0016] 2. The locking mechanism includes a V-shaped spring, a V-shaped bracket, and a low-temperature control ring. Normally, the low-temperature control ring rests against the locking tongue, restricting its rotation. When the temperature is relatively high, the low-temperature control ring melts, and the locking tongue rotates under the action of the V-shaped spring, thus inserting into the slot on the V-shaped bracket to lock the valve plate door, thereby making the valve plate door close more tightly.

[0017] 3. A connecting sleeve is provided at 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, which further makes the check valve close more tightly. Attached Figure Description

[0019] Figure 1 This is a side view of a check valve according to this utility model.

[0020] Figure 2 This is a top-view three-dimensional structural diagram of a check valve according to this utility model.

[0021] Figure 3 This is a bottom-view three-dimensional structural diagram of a check valve according to this utility model.

[0022] Figure 4 This is a schematic diagram of the structure of a check valve after disassembly and connection of the sleeve according to this utility model.

[0023] Figure 5 This is a schematic diagram of the internal structure of a check valve according to this utility model.

[0024] Figure 6 This is a schematic diagram showing the disassembly state of a check valve according to this utility model.

[0025] Figure 7 This is a schematic diagram of the structure of a check valve rotation mechanism according to this utility model.

[0026] Figure 8 This is a schematic diagram showing the disassembled state of a check valve locking mechanism according to this utility model.

[0027] Figure 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 bracket; 303. Connecting bracket; 304. Torsion spring; 305. Push bracket; 306. Temperature sensing element; 307. First screw; 308. Push rod; 309. First slot; 310. Crossbar; 311. Second slot; 312. Mounting bracket; 313. Backtooth; 401. Base plate; 402. Upper frame; 403. V-shaped spring; 404. V-shaped bracket; 405. Mounting bolt; 406. Low temperature control ring; 407. First screw hole; 408. Fixing bolt; 409. Locking tongue; 410. Hole; 411. Slot; 412. Second screw hole; 413. Second screw; 414. Wing nut. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

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

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

[0033] The rotating mechanism includes a U-shaped seat 301, a fixed frame 302, a connecting frame 303, a torsion spring 304, a pusher 305, and a temperature sensing element 306. The U-shaped seat 301 is disposed on the inner wall of the valve body 100. A first screw 307 is provided on the U-shaped seat 301, and a torsion spring 304 is sleeved on the first screw 307. A push rod 308 is provided at one end of the torsion spring 304. A pusher 305 is provided on one side of the torsion spring 304 on the first screw 307. A first slot 309 is provided at the lower end of the pusher 305, and the push rod 308 is located in the first slot 309. A crossbar 310 is provided on the pusher 305. A connecting frame 303 is provided on the first screw 307, and the other end of the connecting frame 303 is connected to the valve plate door 200. Next, the crossbar 310 extends into the connecting frame 303 and cooperates with the connecting frame 303. The U-shaped seat 301 is provided with a fixing frame 302 in the middle. The fixing frame 302 is provided with a second slot 311 on one side. The other end of the torsion spring 304 is located in the second slot 311 and is used to provide rotational force for the valve plate door 200. The fixing frame 302 is provided with a temperature sensing element 306. 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 contract 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. The crossbar 310 then pushes the connecting frame 303 to rotate, thereby driving the valve plate door 200 to close.

[0034] The valve body 100 is provided with a mounting bracket 312 on the outside. The mounting bracket 312 is connected to the valve body 100 and the U-shaped seat 301 by bolts. The mounting bracket 312 is provided with a backing tooth 313.

[0035] The locking mechanism includes a base plate 401, an upper frame 402, a V-spring 403, a V-bracket 404, mounting bolts 405, and a low-temperature control ring 406. The base plate 401 is located at the bottom of the valve body 100. Mounting bolts 405 are located above the base plate 401 on the inner wall of the valve body 100. The upper frame 402 is mounted on the mounting bolts 405. Symmetrical first screw holes 407 are provided on the upper frame 402. The lower ends of the first screw holes 407 extend to the base plate 401. Fixing bolts 408 are located within the first screw holes 407. A locking tongue 409 is rotatably mounted 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 abuts against the locking tongue 409, providing force for the rotation of the locking tongue 409. The other end of the V-shaped spring 403 abuts against the upper frame 402. The upper frame 402 has a hole 410 in the middle, which extends to the bottom plate 401. A low temperature control ring 406 is provided in the hole 410. The low temperature control ring 406 and the V-shaped spring 403 cooperate. The V-shaped bracket 404 is set on the valve plate door 200. The V-shaped bracket 404 has a slot 411, and the locking tongue 409 cooperates with the slot 411.

[0036] The mounting bolt 405 has a second screw hole 412 in the middle, a second screw 413 is provided in the second screw hole 412, and a wing nut 414 is provided at one end of the second screw 413.

[0037] The valve body 100 is provided with a connecting sleeve 101 at its upper end, which facilitates the connection of the check valve to the 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 a specific implementation of this invention, during installation, the check valve is first connected to the pipeline system via the connecting sleeve 101.

[0040] Open the valve plate door 200 and place one end of the temperature sensing element 306 against the pusher 305. This will limit the rotation of the pusher 305 and simultaneously complete the storage of the torsion spring 304.

[0041] When the low temperature control ring 406 is activated in 20 seconds during refractory conditions, it releases the restriction on the locking tongue 409. Since one end of the V-shaped spring 403 is pressed against the locking tongue 409, it will drive the locking tongue 409 to rotate and pop out the locking tongue 409.

[0042] When the temperature control start time reaches 50-60 seconds, the temperature sensing element 306 will deform and contract, 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. The crossbar 310 on the push frame 305 will drive the connecting frame 303 to rotate, thereby driving the valve plate door 200 to rotate and close, returning to its original position. The locking tongue 409 will slide into the slot 411 along the V-shaped frame 404, thereby locking the return of the valve plate door 200, thus effectively ensuring the time limit during 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, making the seal tighter. In this way, when a fire occurs, the check valve is locked by the locking tongue 409, which effectively isolates the fire in the public exhaust duct or the indoor fire, and prevents the fire from being delayed or the smoke from being leaked.

[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 this utility model, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "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 this utility model, "a plurality of" means at least two.

[0048] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A check valve, characterized in that, include: The valve body (100), valve plate door (200), rotating mechanism and locking mechanism are provided. The valve body (100) is provided with valve plate door (200) at the lower end. The valve body (100) is provided with locking mechanism on one side inside the valve body (100). The bottom of the locking mechanism is connected and cooperates with the valve plate door (200). The valve body (100) is provided with rotating mechanism on the other side inside the valve body (100). The bottom of the rotating mechanism is connected to the valve plate door (200). The rotating mechanism includes a U-shaped seat (301), a fixed frame (302), a connecting frame (303), a torsion spring (304), a pusher (305), and a temperature sensing element (306). The U-shaped seat (301) is disposed on the inner wall of the valve body (100). A first screw (307) is provided on the U-shaped seat (301). A torsion spring (304) is sleeved on the first screw (307). A pusher (308) is provided at one end of the torsion spring (304). A pusher (305) is provided on one side of the torsion spring (304) on the first screw (307). A first slot (309) is provided at the lower end of the pusher (305). The pusher (308) is located in the first slot (309). The push frame (305) is provided with a crossbar (310), and the first screw (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 crossbar (310) extends into the connecting frame (303) and cooperates with the connecting frame (303). The U-shaped seat (301) is provided with a fixing frame (302) in the middle. The fixing frame (302) is provided with a second slot (311) on one side. The other end of the torsion spring (304) is located in the second slot (311). The fixing frame (302) is provided with a temperature sensing element (306). One end of the temperature sensing element (306) is located above the push frame (305) and cooperates with the push frame (305).

2. A check valve according to claim 1, characterized in that: The valve body (100) is provided with a mounting bracket (312) on the outside. The mounting bracket (312) is connected to the valve body (100) and the U-shaped seat (301) by bolts. The mounting bracket (312) is provided with a backing tooth (313).

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

4. A check valve according to claim 3, characterized in that: The mounting bolt (405) has a second screw hole (412) in the middle, a second screw (413) is provided in the second screw hole (412), and a wing nut (414) is provided at one end of the second screw (413).

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

6. 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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