Fireproof check valve

Abstract

The utility model relates to the technical field of check valves, and discloses a fireproof check valve which comprises a shell and a separating mechanism, the separating mechanism comprises a fixing block, four gears and two separating plates, the upper end and the lower end of the fixing block are fixedly connected with the shell, rotating grooves are formed in the upper end and the lower end of the interior of the fixing block, and the four gears are arranged in the rotating grooves. An action mechanism is arranged in the fixing block and comprises a fixing frame, two supporting blocks, a pull rod and a limiting block, rotating rods are rotationally connected to the two sides of the inner wall of the front end and the two sides of the inner wall of the rear end of the fixing frame, the lower ends of the rotating rods are fixedly connected with the supporting blocks, and the outer walls of rod bodies of the rotating rods are sleeved with torsional springs. According to the valve, heat is conducted through the heat conduction block, the telescopic block pushes the limiting block, the reset spring enables the clamping block to release clamping connection to the limiting block, the limiting block is opened, after the telescopic block is cooled, the limiting block is folded, the clamping block is connected with the limiting block in a clamping mode through the pull rod, the limiting block falls to block the clamping block, and the valve can be repeatedly used.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a fireproof check valve. Background Technique

[0002] A check valve is an automatic valve mainly used to prevent the backflow of fluids in a pipeline system, ensuring that the medium can only flow in one direction. A fireproof check valve is an important device with the functions of fire prevention and preventing the backflow of smoke, and is usually used in the smoke exhaust systems of places such as kitchens and bathrooms.

[0003] However, since most fireproof check valves use the property that the fusing metal melts and breaks when encountering high temperature to restrict the partition that blocks flames and smoke and prevent it from opening, after the fusing metal melts, its physical connection is permanently damaged, and the entire fusing element or even the entire valve needs to be replaced to make it work again, increasing the usage cost for users.

[0004] Therefore, those skilled in the art have provided a fireproof check valve to solve the problems raised in the above background technique. Content of the Utility Model

[0005] The purpose of the content of the utility model is to solve the deficiencies existing in the prior art, and provide a fireproof check valve. Heat is conducted through a heat conducting block to make a telescopic block push a limiting block, and a clamping block releases the clamping connection to the limiting block through a return spring, so that the limiting block blocks the partition. After the telescopic block cools down, the limiting block is closed, and a pull rod is used to make the clamping block clamp the limiting block, causing the limiting block to fall and block the clamping block, enabling the valve to be reused.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A fireproof check valve includes a housing and a partitioning mechanism. The partitioning mechanism includes a fixed block, four gears, and two partitions. The upper and lower ends of the fixed block are fixedly connected to the housing. Rotating grooves are respectively opened at the upper and lower ends inside the fixed block. An operating mechanism is arranged inside the fixed block. The operating mechanism includes a fixed frame, two support blocks, a pull rod, and a limiting block. Rotating rods are rotatably connected to both sides of the front and rear inner walls of the fixed frame. The lower ends of the rotating rods are fixedly connected to the support blocks, and torsion springs are sleeved on the outer walls of the rod bodies of the rotating rods;

[0008] A moving groove is formed in the middle of the fixed block. A reset spring is fixedly connected to the inner wall at the rear end of the moving groove. The front end of the reset spring is fixedly connected to a clamping block. The rear end of the clamping block is fixedly connected to a pull rod. The front ends of the clamping blocks all penetrate through the fixed block and are clamped and connected to the support block. The middle of the outer wall at the front end of the fixed block is fixedly connected to a heat-conducting block. The rear end of the heat-conducting block penetrates through the fixed block and is fixedly connected to a telescopic block. The upper end of the telescopic block is in contact with a limiting block. The outer wall at the rear end of the limiting block is in contact with the clamping block;

[0009] Through the above technical solution, the high temperature received is conducted to the telescopic block through the heat-conducting block, causing it to expand and elongate due to heat, and pushing the limiting block to move upward. Using the elastic force of the reset spring, the clamping block moves forward to release the clamping state of the limiting block, allowing the limiting block to block the partition. After the telescopic block cools down, the limiting block closes, and the pull rod is used to drive the clamping block to resume the clamping of the limiting block. The limiting block naturally drops, restoring the blockage of the clamping block, enabling the valve to be reused. The lower end of the telescopic block is fixedly wrapped by the heat-conducting block and can receive the heat on the heat-conducting block well. The heat-conducting block is made of copper with better heat conductivity, and the telescopic block is made of zinc-aluminum alloy with a higher linear thermal expansion coefficient.

[0010] Furthermore, mounting grooves are formed at the four peripheral positions at the front end of the outer shell, and the front end of the inner top surface of the outer shell is fixedly connected to a fixed frame by screws;

[0011] Through the above technical solution, the fireproof check valve can be fixed at the required position by the four mounting grooves formed on the outer shell in cooperation with multiple screws, and the fixed frame is fixedly connected to the outer shell by two screws, facilitating assembly.

[0012] Furthermore, a rotating shaft is fixedly connected to one side of each partition near the center of the fixed block. The upper and lower ends of the rotating shaft penetrate through the fixed block and are fixedly connected to gears. The gears all rotate inside the rotating groove and are meshed with each other;

[0013] Through the above technical solution, by fixedly connecting the partition to the rotating shaft and fixedly connecting the rotating shaft to the gears inside the rotating groove, the meshing between the two gears enables the partition to rotate simultaneously, avoiding the situation where one partition opens while the other closes, allowing the air flow to flow smoothly.

[0014] Furthermore, a sealing ring is fixedly connected to the rear end of each partition, and the rear end of the sealing ring is in close contact with the outer shell;

[0015] Through the above technical solution, by the sealing ring fixedly connected to the partition being in close contact with the outer shell, when the partition closes, the sealing ring is used to fill the gap, improving the sealing ability.

[0016] Furthermore, elastic sheets are fixedly connected to both the upper and lower ends of the outer wall of the front end of the fixed block, and both sides of the outer wall of the rear end of the elastic sheet are in contact with the partition board;

[0017] Through the above technical solution, the two elastic sheets fixedly connected to the front end of the fixed block are in contact with the partition board, so that the partition board is pushed open by the airflow. After the airflow disappears, the elastic force of the elastic sheet enables the partition board to close automatically, preventing external airflow or foreign objects from invading.

[0018] Furthermore, the front end of the torsion spring is fixedly connected to the support block, and the rear ends of the torsion spring are both fixedly connected to the fixed frame;

[0019] Through the above technical solution, since the front end of the torsion spring is fixedly connected to the support block and the rear end is fixedly connected to the fixed frame, when the support block is in the closed state, the torsion spring is in a state of storing energy. After the latch releases the clamping state of the support block, the torsion spring releases its elastic force to rotate the support block along the rotating rod, blocking the partition board to prevent the partition board from being opened.

[0020] Furthermore, the rear end of the pull rod penetrates through the moving groove to the outside of the fixed block, and both the latch and the limiting block slide inside the moving groove;

[0021] Through the above technical solution, by passing the rear end of the pull rod to the outside of the fixed block, after the action mechanism is executed, the staff can pull the pull rod to drive the latch to move inside the moving groove and restore the clamping state of the support block.

[0022] The utility model has the following beneficial effects:

[0023] A fireproof check valve proposed by the utility model conducts the received high temperature to the telescopic block through the heat-conducting block in the action mechanism, causing it to expand and elongate due to heat, and pushing the limiting block upward. Using the elastic force of the return spring, the latch moves forward to release the clamping state of the limiting block, allowing the limiting block to block the partition board. After the telescopic block cools down, the limiting block closes, and the pull rod is used to drive the latch to restore the clamping state of the limiting block. The limiting block naturally drops to restore the blockage of the latch, and thus it can be manually reset and reused, reducing the usage cost of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the main structure of a fireproof check valve proposed by the utility model;

[0025] Figure 2 is an exploded view of a fireproof check valve proposed by the utility model;

[0026] Figure 3 is a side sectional view of a fireproof check valve proposed by the utility model;

[0027] Figure 4 Axial sectional view of a fireproof check valve proposed by the present utility model;

[0028] Figure 5 is Figure 2 Enlarged view of part A in

[0029] Figure 6 is Figure 3 Enlarged view of part B in

[0030] Figure 7 is Figure 4 Enlarged view of part C in

[0031] Explanation of reference numerals:

[0032] 1. Outer shell; 2. Installation groove; 3. Partition mechanism; 301. Fixed block; 302. Rotating shaft; 303. Rotating groove; 304. Gear; 305. Partition plate; 306. Sealing ring; 307. Elastic sheet; 4. Actuating mechanism; 401. Fixed frame; 402. Rotating rod; 403. Torsion spring; 404. Support block; 405. Moving groove; 406. Return spring; 407. Block; 408. Pull rod; 409. Heat conducting block; 410. Telescopic block; 411. Limiting block. Specific implementation manners

[0033] Next, with reference to the accompanying drawings in the specific implementation manners of the present utility model, the technical solutions in the specific implementation manners of the present utility model will be clearly and completely described. Obviously, the described specific implementation manners are only a part of the specific implementation manners of the present utility model, rather than all of the specific implementation manners. Based on the specific implementation manners of the present utility model, all other specific implementation manners obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the present utility model.

[0034] Referring to Figures 1-7 , the present utility model provides a specific implementation manner: a fireproof check valve, including an outer shell 1 and a partition mechanism 3. The partition mechanism 3 includes a fixed block 301, four gears 304 and two partition plates 305. The upper and lower ends of the fixed block 301 are fixedly connected to the outer shell 1. Rotating grooves 303 are respectively opened at the upper and lower ends inside the fixed block 301. An actuating mechanism 4 is arranged inside the fixed block 301. The actuating mechanism 4 includes a fixed frame 401, two support blocks 404, a pull rod 408 and a limiting block 411. The two sides of the front and rear inner walls of the fixed frame 401 are respectively rotatably connected with rotating rods 402. The lower ends of the rotating rods 402 are fixedly connected to the support blocks 404. Torsion springs 403 are respectively sleeved on the outer walls of the rotating rod bodies of the rotating rods 402;

[0035] A moving groove 405 is formed in the middle inside the fixed block 301. A reset spring 406 is fixedly connected to the inner wall at the rear end of the moving groove 405. The front end of the reset spring 406 is fixedly connected to a clamping block 407. The rear end of the clamping block 407 is fixedly connected to a pull rod 408. The front ends of the clamping blocks 407 penetrate through the fixed block 301 and are in clamping connection with the support block 404. The middle of the outer wall at the front end of the fixed block 301 is fixedly connected to a heat conducting block 409. The rear end of the heat conducting block 409 penetrates through the fixed block 301 and is fixedly connected to a telescopic block 410. The upper end of the telescopic block 410 is in contact with a limiting block 411. The outer wall at the rear end of the limiting block 411 is in contact with the clamping block 407.

[0036] The heat conducting block 409 in the actuating mechanism 4 conducts the received high temperature to the telescopic block 410, causing it to expand and elongate due to heat. The telescopic block 410 then pushes the limiting block 411 to move upward. Using the elastic force of the reset spring 406, the clamping block 407 moves forward to release the clamping state of the limiting block 411, allowing the limiting block 411 to block the partition plate 305. After the telescopic block 410 cools down, the limiting block 411 closes, and the pull rod 408 drives the clamping block 407 to resume the clamping of the limiting block 411. The limiting block 411 naturally drops, restoring the blocking of the clamping block 411. Thus, it can be manually reset and reused, reducing the usage cost for the user.

[0037] Installation grooves 2 are provided at the four-week front end of the outer wall of the outer shell 1. The front end of the inner top surface of the outer shell 1 is fixedly connected to the fixing frame 401 by screws. The fireproof check valve can be fixed at the required position by the four installation grooves 2 provided on the outer shell 1 in cooperation with multiple screws. The fixing frame 401 is fixedly connected to the outer shell 1 by two screws, which is convenient for assembly. On one side of the partition 305 close to the center of the fixing block 301, a rotating shaft 302 is fixedly connected. The upper and lower ends of the rotating shaft 302 penetrate through the fixing block 301 and are fixedly connected to the gears 304. The gears 304 rotate inside the rotating grooves 303 and are meshed with each other. By fixedly connecting the partition 305 with the rotating shaft 302 and fixedly connecting the rotating shaft 302 with the gears 304 inside the rotating grooves 303, the meshing between the two gears 304 enables the partition 305 to rotate simultaneously, avoiding the situation where one partition 305 opens while the other closes, and enabling the air flow to flow smoothly. Sealing rings 306 are fixedly connected to the rear ends of the partitions 305. The rear ends of the sealing rings 306 are closely attached to the outer shell 1. By the sealing rings 306 fixedly connected to the partitions 305 being closely attached to the outer shell 1, when the partitions 305 are closed, the gaps are filled by the sealing rings 306, improving the sealing ability. Elastic pieces 307 are fixedly connected to the upper and lower ends of the front outer wall of the fixing block 301. The two sides of the rear outer wall of the elastic pieces 307 are attached to the partitions 305. By the two elastic pieces 307 fixedly connected to the front end of the fixing block 301 being attached to the partitions 305, the partitions 305 are pushed open by the air flow, and after the air flow disappears, the elastic force of the elastic pieces 307 enables the partitions 305 to close automatically, preventing external air flow or foreign objects from invading. The front end of the torsion spring 403 is fixedly connected to the support block 404, and the rear ends of the torsion spring 403 are fixedly connected to the fixing frame 401. By the front end of the torsion spring 403 being fixedly connected to the support block 404 and the rear end being fixedly connected to the fixing frame 401, when the support block 404 is in the closed state, the torsion spring 403 is in a state of storing energy, and after the latch 407 releases the clamping state of the support block 404, the torsion spring 403 releases its elastic force to rotate the support block 404 along the rotating rod 402 to block the partition 305 and prevent the partition 305 from being opened. The rear end of the pull rod 408 penetrates through the moving groove 405 to the outside of the fixing block 301. The latch 407 and the limiting block 411 both slide inside the moving groove 405. By penetrating the rear end of the pull rod 408 to the outside of the fixing block 301, after the action mechanism 4 is executed, the staff can pull the pull rod 408 to drive the latch 407 to move inside the moving groove 405 to restore the clamping state of the support block 404.

[0038] Working principle: When using this fireproof check valve, the staff first install the valve at the required position by using the installation groove 2 opened on the outer shell 1 in cooperation with multiple screws, and connect the exhaust pipe to the rear end of the outer shell 1. Then, when there is a flame or abnormal high-temperature air flow outside, the heat-conducting block 409 conducts the received high temperature to the telescopic block 410, causing it to expand and elongate due to heat, and pushing the limiting block 411 to move upward. Using the elastic force of the return spring 406, the clamping block 407 moves forward to release the clamping state of the limiting block 411, allowing the limiting block 411 to block the partition plate 305 and prevent the partition plate 305 from being opened. After the telescopic block 410 cools down, the limiting block 411 is closed, and the clamping block 407 is driven by the pull rod 408 to resume the clamping of the limiting block 411. The limiting block 411 naturally falls, restoring the blockage of the clamping block 407. Therefore, it can be reused when the valve is damaged slightly.

[0039] In this article, the following points need to be noted:

[0040] 1. The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure. Other structures can refer to the general design.

[0041] 2. Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0042] Finally, it should be noted that the above are only the preferred specific embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing specific embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fireproof check valve, comprising a housing (1) and a separating mechanism (3), characterized in that: The separation mechanism (3) includes a fixed block (301), four gears (304) and two partition plates (305). The upper and lower ends of the fixed block (301) are fixedly connected to the outer shell (1). Rotation grooves (303) are provided at the upper and lower ends inside the fixed block (301). An action mechanism (4) is arranged inside the fixed block (301). The action mechanism (4) includes a fixed frame (401), two support blocks (404), a pull rod (408) and a limiting block (411). Rotating rods (402) are rotatably connected to both sides of the front and rear inner walls of the fixed frame (401). The lower ends of the rotating rods (402) are fixedly connected to the support blocks (404). Torsion springs (403) are sleeved on the outer walls of the rod bodies of the rotating rods (402). A moving groove (405) is provided in the middle inside the fixed block (301). A return spring (406) is fixedly connected to the inner wall at the rear end of the moving groove (405). A clamping block (407) is fixedly connected to the front end of the return spring (406). The rear end of the clamping block (407) is fixedly connected to the pull rod (408). The front ends of the clamping blocks (407) penetrate through the fixed block (301) and are in clamping connection with the support blocks (404). A heat conducting block (409) is fixedly connected to the middle of the front outer wall of the fixed block (301). The rear end of the heat conducting block (409) penetrates through the fixed block (301) and is fixedly connected to a telescopic block (410). The upper end of the telescopic block (410) is in contact with the limiting block (411). The outer wall at the rear end of the limiting block (411) is in contact with the clamping block (407).

2. The fireproof check valve according to claim 1, characterized in that: Installation grooves (2) are provided at the four peripheral positions of the front end of the outer wall of the outer shell (1). The front end of the inner top surface of the outer shell (1) is fixedly connected to the fixed frame (401) by screws.

3. The fireproof check valve according to claim 1, wherein: Rotating shafts (302) are fixedly connected to the sides of the partition plates (305) close to the center of the fixed block (301). The upper and lower ends of the rotating shafts (302) penetrate through the fixed block (301) and are fixedly connected to the gears (304). The gears (304) rotate inside the rotation grooves (303) and are meshed with each other.

4. A fireproof check valve according to claim 1, characterized in that: Sealing rings (306) are fixedly connected to the rear ends of the partition plates (305). The rear ends of the sealing rings (306) are in close contact with the outer shell (1).

5. A fireproof check valve according to claim 1, characterized in that: Elastic sheets (307) are fixedly connected to the upper and lower ends of the front outer wall of the fixed block (301). The two sides of the rear outer walls of the elastic sheets (307) are in contact with the partition plates (305).

6. The fireproof check valve according to claim 1, characterized in that: The front ends of the torsion springs (403) are fixedly connected to the support blocks (404). The rear ends of the torsion springs (403) are fixedly connected to the fixed frame (401).

7. A fireproof check valve according to claim 1, characterized in that: The rear end of the pull rod (408) penetrates through the moving groove (405) to the outside of the fixed block (301). The clamping block (407) and the limiting block (411) both slide inside the moving groove (405).

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