Fireproof check valve

Abstract

The utility model belongs to the technical field of check valves, and particularly relates to a fireproof check valve which comprises a mounting plate, and a positioning plate is mounted on one side of the mounting plate. The side, away from the mounting plate, of the positioning plate is fixedly connected with a valve pipe. A baffle is rotationally connected to the middle part in the valve pipe; a first arc-shaped stop lever is fixedly connected to the position, corresponding to the baffle, of the upper portion in the valve pipe. A second arc-shaped stop lever is fixedly connected to the position, corresponding to the baffle, of the lower portion in the valve pipe, and the rotating circle center of the baffle is located between the first arc-shaped stop lever and the second arc-shaped stop lever. A first connecting rod is fixedly connected to the position, away from the second arc-shaped stop lever, of the bottom of the baffle. A baffle can be blocked under the cooperation of a first arc-shaped blocking rod and a second arc-shaped blocking rod, so that fire can be blocked under the action of the baffle, in the subsequent continuous use process, a new rubber strip is taken, the two ends of the rubber strip are connected to the outer side of a first lantern ring and the outer side of a second lantern ring in a sleeving mode, then the baffle can be fixed again, and replacement is convenient and fast.

Description

Technical Field

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

[0002] Fire check valves are specially designed check valves that are primarily used to stop the spread of flames and smoke in the event of a fire. They are typically installed in a building's ventilation ducts, smoke exhaust systems, or air conditioning systems to prevent fire and smoke from spreading.

[0003] Patent application number: 202122276968.5 discloses a fire check valve, including an oil smoke pipe and a valve cover plate, and also includes a fire-proof temperature-sensitive fuse device, a locking structure and a first elastic component. The fire-proof temperature-sensitive fuse device, the locking structure and the first elastic component are all installed on the outer wall of the oil smoke pipe; the locking structure is used to lock the first elastic component so that the first elastic component and the valve cover plate are in an independent state without affecting the closing of the valve cover plate; the fire-proof temperature-sensitive fuse device makes the locking structure in a locked state. state; when the fire-proof temperature-sensitive fuse device is not disconnected, the locking structure is in a locked state; when the temperature inside the range hood exceeds 150°C, or the temperature reaches the melting temperature of the fire-proof temperature-sensitive fuse device, the fire-proof temperature-sensitive fuse device is disconnected, and the locking device connected to the fire-proof temperature-sensitive fuse device moves upward under the action of the spring, and the first elastic component located inside the locking device restores the elastic force, touching the valve cover plate, so that the valve cover plate is forced to cover the exhaust port of the range hood, which prevents the spread of smoke and fire into the house and prevents the occurrence of fire.

[0004] In the current existing technology, although the fire-proof temperature-sensitive fuse device, the locking structure and the first elastic component cooperate to force the valve cover to cover the exhaust port of the oil fume hood when the temperature in the oil fume hood is too high, thereby preventing smoke and fire from spreading back into the house and preventing fire from occurring, after the temperature of the oil fume hood drops, if the fire-proof check valve is not damaged, it will continue to be used. When it continues to be used, the fire-proof temperature-sensitive fuse device needs to be reinstalled, which is more troublesome to install.

[0005] Therefore, a fire-proof check valve is proposed to solve the above problems. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art and solve the above-mentioned problems, a fire-proof check valve is proposed.

[0007] The technical solution adopted by the utility model to solve its technical problems is: a fire-proof check valve described in the utility model includes a mounting plate, a positioning plate is installed on one side of the mounting plate; the positioning plate is fixedly connected to a valve tube on the side away from the mounting plate; a baffle is rotatably connected in the middle of the valve tube; a No. 1 arc-shaped baffle rod is fixedly connected to a position corresponding to the baffle above the interior of the valve tube; a No. 2 arc-shaped baffle rod is fixedly connected to a position corresponding to the baffle below the interior of the valve tube, and the center of rotation of the baffle is located between the No. 1 arc-shaped baffle rod and the No. 2 arc-shaped baffle rod; a No. 1 connecting rod is fixedly connected to the bottom of the baffle away from the No. 2 arc-shaped baffle rod; a No. 1 ring is fixedly connected to the bottom of the No. 1 connecting rod; a rubber strip is sleeved on the inside of the No. 1 ring; a No. 2 ring is sleeved on the inner side of the other end of the rubber strip; the bottom of the No. 2 ring is fixedly connected to the No. 2 connecting rod, and the bottom of the No. 2 connecting rod is fixed to the inside of the valve tube; a counterweight block is fixedly connected to the position of the upper surface of the baffle near the No. 1 arc-shaped baffle rod.

[0008] Preferably, four evenly arranged L-shaped positioning blocks are fixed to one side of the mounting plate close to the positioning plate, and the L-shaped positioning blocks are located on the outside of the positioning plate; each of the L-shaped positioning blocks is provided with a telescopic slot corresponding to the position of the positioning plate; a spring is fixed in the telescopic slot; a pressure block is fixed to one end of the spring close to the positioning plate, and the pressure block is slidably connected in the telescopic slot; the positioning plate is located between the pressure block and the mounting plate.

[0009] Preferably, a pull rod is fixedly connected to one side of the pressure block close to the spring, and the pull rod is located inside the spring; the pull rod passes through the L-shaped positioning block; and a pull ring is fixedly connected to one end of the pull rod away from the spring.

[0010] Preferably, the pressing block is provided with a first arc surface on a side away from the mounting plate; the positioning plate is provided with a second arc surface on a side close to the mounting plate, and the first arc surface and the second arc surface are used in conjunction with each other.

[0011] Preferably, a side of the No. 1 arc-shaped baffle bar close to the No. 2 arc-shaped baffle bar is fixedly connected to a No. 1 magnet; and a side of the No. 2 arc-shaped baffle bar close to the No. 1 arc-shaped baffle bar is fixedly connected to a No. 2 magnet.

[0012] Preferably, the mounting plate is provided with a plurality of groups of evenly arranged mounting holes.

[0013] Beneficial effects of the utility model:

[0014] The utility model provides a fire-proof check valve, which can discharge smoke normally when in use. When the temperature inside the valve tube is too high, the rubber strip will be melted. After the rubber strip is melted, the connection between the No. 1 sleeve and the No. 2 sleeve is lost, and the baffle is not fixed at the same time. Under the action of the gravity of the counterweight block, one end of the baffle is pressed down to rotate the baffle. When the baffle is rotated to a state perpendicular to the horizontal plane, one side of the baffle will contact the No. 1 arc-shaped baffle rod, and the other side will contact the No. 2 arc-shaped baffle rod. With the cooperation of the No. 1 arc-shaped baffle rod and the No. 2 arc-shaped baffle rod, the baffle can be blocked, so that the fire can be blocked under the action of the baffle. When it is continued to be used in the future, a new rubber strip is taken, and the two ends of the rubber strip are sleeved on the outside of the No. 1 sleeve and the No. 2 sleeve, so that the baffle can be fixed again, and replacement is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is a cross-sectional view of the utility model;

[0018] Figure 3 This is a three-dimensional diagram of the L-shaped positioning block in the utility model;

[0019] Figure 4 This is a cross-sectional view of the L-shaped positioning block in the utility model;

[0020] Figure 5 This is a three-dimensional diagram of the valve pipe in the utility model;

[0021] Figure 6 It is a three-dimensional diagram of the baffle in the utility model.

[0022] Legend:

[0023] 1. Mounting plate; 11. Threaded groove; 12. Positioning plate; 13. Valve tube; 2. L-shaped positioning block; 21. Telescopic slot; 22. Spring; 23. Pressure block; 24. Pull rod; 25. Pull ring; 3. Baffle; 31. Connecting rod No. 1; 32. Collar No. 1; 33. Rubber strip; 34. Collar No. 2; 35. Connecting rod No. 2; 36. Curved baffle No. 1; 37. Curved baffle No. 2; 38. Counterweight; 4. Curved surface No. 1; 41. Curved surface No. 2; 5. Magnet No. 1; 51. Magnet No. 2. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Specific examples are given below.

[0026] See also Figure 1-Figure 5 The utility model provides a fire-proof check valve, comprising a mounting plate 1, a positioning plate 12 being mounted on one side of the mounting plate 1; a valve tube 13 being fixedly connected to the side of the positioning plate 12 away from the mounting plate 1; a baffle 3 being rotatably connected to the middle portion of the valve tube 13; a first arc-shaped baffle rod 36 being fixedly connected to the upper portion of the valve tube 13 corresponding to the position of the baffle 3; a second arc-shaped baffle rod 37 being fixedly connected to the lower portion of the valve tube 13 corresponding to the position of the baffle 3, and the rotation center of the baffle 3 is located between the first arc-shaped baffle rod 36 and the second arc-shaped baffle rod 37. The bottom of the baffle 3 is fixedly connected to a No. 1 connecting rod 31 at a position away from the No. 2 arc-shaped baffle rod 37; the bottom of the No. 1 connecting rod 31 is fixedly connected to a No. 1 collar 32; a rubber strip 33 is sleeved on the inside of the No. 1 collar 32; a No. 2 collar 34 is sleeved on the inner side of the other end of the rubber strip 33; a No. 2 connecting rod 35 is fixedly connected to the bottom of the No. 2 collar 34, and the bottom of the No. 2 connecting rod 35 is fixedly connected to the inside of the valve tube 13; a counterweight 38 is fixedly connected to the upper surface of the baffle 3 near the No. 1 arc-shaped baffle rod 36.

[0027] When the fire extinguisher 3 is in operation, the fire extinguisher 3 will be discharged normally. When the temperature inside the valve tube is too high, the rubber strip 33 will be melted. After the rubber strip 33 is melted, the connection between the No. 1 collar 32 and the No. 2 collar 34 is lost, and the baffle 3 is fixed. Under the action of the gravity of the counterweight block 38, one end of the baffle 3 is pressed down, causing the baffle 3 to rotate. When the baffle 3 rotates to a state perpendicular to the horizontal plane, one side of the baffle 3 will contact the No. 1 arc-shaped baffle rod 36, and the other side will contact the No. 2 arc-shaped baffle rod 37. Under the cooperation of the No. 1 arc-shaped baffle rod 36 and the No. 2 arc-shaped baffle rod 37, the baffle 3 can be blocked, so that the fire can be blocked under the action of the baffle 3. When it is continued to be used in the future, a new rubber strip 33 is taken, and the two ends of the rubber strip 33 are sleeved on the outside of the No. 1 collar 32 and the No. 2 collar 34, so that the baffle 3 can be fixed again, which is convenient for replacement.

[0028] Further, such as Figure 1-Figure 4As shown, four evenly arranged L-shaped positioning blocks 2 are fixed to one side of the mounting plate 1 close to the positioning plate 12, and the L-shaped positioning blocks 2 are located on the outside of the positioning plate 12; each of the L-shaped positioning blocks 2 is provided with a telescopic slot 21 at a position corresponding to the positioning plate 12; a spring 22 is fixed in the telescopic slot 21; a pressure block 23 is fixed to one end of the spring 22 close to the positioning plate 12, and the pressure block 23 is slidably connected in the telescopic slot 21; the positioning plate 12 is located between the pressure block 23 and the mounting plate 1.

[0029] During operation, when installing the positioning plate 12, the side of the positioning plate 12 away from the valve tube 13 is placed against the middle of the four L-shaped positioning blocks 2 fixed to the mounting plate 1. In the process of placing the positioning plate 12 into the middle of the four L-shaped positioning blocks 2, the positioning plate 12 will contact the pressing block 23. Under the squeezing of the positioning plate 12, the pressing block 23 will slide into the L-shaped positioning block 2. In the process of the pressing block 23 entering the L-shaped positioning block 2, the spring 22 will contract under the squeezing and will give the pressing block 23 a thrust. After the positioning plate 12 passes over the pressing block 23, under the action of the thrust of the spring 22, the pressing block 23 slides out of the L-shaped positioning block 2 and presses on the side of the positioning plate 12 close to the valve tube 13, thereby fixing the positioning plate 12.

[0030] Further, such as Figure 1-Figure 4 As shown, a pull rod 24 is fixedly connected to one side of the pressure block 23 close to the spring 22 , and the pull rod 24 is located inside the spring 22 ; the pull rod 24 passes through the L-shaped positioning block 2 ; a pull ring 25 is fixedly connected to one end of the pull rod 24 away from the spring 22 .

[0031] During operation, through the pull rod 24 fixed to one side of the pressure block 23 and the pull ring 25 fixed to the pull rod 24, after the fire check valve is damaged, the staff pulls the pull ring 25, so that the pull rod 24 drives the pressure block 23 into the L-shaped positioning block 2, thereby making the positioning plate 12 lose its fixation. After the positioning plate 12 loses its fixation, the damaged fire check valve can be removed and a new fire check valve can be taken out for replacement.

[0032] Further, such as Figure 3 and Figure 5 As shown, the pressing block 23 has a first arc surface 4 on the side away from the mounting plate 1 ; the positioning plate 12 has a second arc surface 41 on the side close to the mounting plate 1 , and the first arc surface 4 and the second arc surface 41 are used in conjunction with each other.

[0033] During operation, through the No. 1 arc surface 4 opened on the pressing block 23 and the No. 2 arc surface 41 opened on the positioning plate 12, after the positioning plate 12 is installed, the No. 2 arc surface 41 of the positioning plate 12 is in the position where it first contacts the No. 1 arc surface 4 of the pressing block 23, thereby facilitating the positioning plate 12 to squeeze the pressing block 23 and facilitate the installation of the positioning plate 12.

[0034] Further, such as Figure 2 As shown, the first arc-shaped baffle 36 is fixedly connected to the first magnet 5 on one side close to the second arc-shaped baffle 37 ; the second arc-shaped baffle 37 is fixedly connected to the second magnet 51 on one side close to the first arc-shaped baffle 36 .

[0035] During operation, through the No. 1 magnet 5 fixed on the No. 1 arc rod and the No. 2 magnet 51 fixed on the No. 2 arc rod, when the baffle 3 rotates close to the No. 1 arc rod and the No. 2 arc rod, the No. 1 magnet 5 and the No. 2 magnet 51 will adsorb both sides of the baffle 3, thereby fixing the baffle 3 and preventing the baffle 3 from deflecting.

[0036] Further, such as Figure 1 As shown, the mounting plate 1 is provided with a plurality of evenly arranged mounting holes.

[0037] During operation, the mounting plate 1 can be installed by using the mounting holes provided on the mounting plate 1 in conjunction with the screws.

[0038] Working principle:

[0039] When in use, smoke can be discharged normally. When the temperature inside the valve tube is too high, the rubber strip 33 will melt. After the rubber strip 33 melts, the connection between the No. 1 collar 32 and the No. 2 collar 34 is lost, and the baffle 3 is fixed. Under the action of the gravity of the counterweight block 38, one end of the baffle 3 is pressed down, causing the baffle 3 to rotate. When the baffle 3 rotates to a state perpendicular to the horizontal plane, one side of the baffle 3 will contact the No. 1 arc-shaped baffle rod 36, and the other side will contact the No. 2 arc-shaped baffle rod 37. With the cooperation of the No. 1 arc-shaped baffle rod 36 and the No. 2 arc-shaped baffle rod 37, the baffle 3 can be blocked, so that the fire can be blocked under the action of the baffle 3. When it is continued to be used in the future, a new rubber strip 33 is taken, and the two ends of the rubber strip 33 are connected to the outside of the No. 1 collar 32 and the No. 2 collar 34, so that the baffle 3 can be fixed again, which is convenient for replacement.

[0040] When installing the positioning plate 12, place the side of the positioning plate 12 away from the valve tube 13 against the middle of the four L-shaped positioning blocks 2 fixed on the mounting plate 1. In the process of placing the positioning plate 12 into the middle of the four L-shaped positioning blocks 2, the positioning plate 12 will contact the pressing block 23. Under the pressure of the positioning plate 12, the pressing block 23 will slide into the L-shaped positioning block 2. In the process of the pressing block 23 entering the L-shaped positioning block 2, the spring 22 will be squeezed. The spring 22 will contract under the pressure and give the pressing block 23 a Thrust, after the positioning plate 12 passes over the pressure block 23, under the action of the thrust of the spring 22, the pressure block 23 slides out from the L-shaped positioning block 2 and presses on the side of the positioning plate 12 close to the valve tube 13, thereby fixing the positioning plate 12; after the fire check valve is damaged, the staff pulls the pull ring 25 to make the pull rod 24 drive the pressure block 23 into the L-shaped positioning block 2, thereby making the positioning plate 12 lose its fixation. After the positioning plate 12 loses its fixation, the damaged fire check valve can be removed and a new fire check valve can be taken out for replacement.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A fire-proof check valve, characterized in that: The invention comprises a mounting plate (1), a positioning plate (12) being mounted on one side of the mounting plate (1); a valve tube (13) being fixedly connected to the side of the positioning plate (12) away from the mounting plate (1); a baffle plate (3) being rotatably connected to the middle part of the valve tube (13); a first arc-shaped baffle rod (36) being fixedly connected to a position corresponding to the baffle plate (3) at the top of the valve tube (13); a second arc-shaped baffle rod (37) being fixedly connected to a position corresponding to the baffle plate (3) at the bottom of the valve tube (13), and the rotation center of the baffle plate (3) is located between the first arc-shaped baffle rod (36) and the second arc-shaped baffle rod (37); the baffle plate ( 3) A No. 1 connecting rod (31) is fixedly connected to a position at the bottom away from the No. 2 arc-shaped baffle rod (37); a No. 1 sleeve ring (32) is fixedly connected to the bottom of the No. 1 connecting rod (31); a rubber strip (33) is sleeved inside the No. 1 sleeve ring (32); a No. 2 sleeve ring (34) is sleeved on the inner side of the other end of the rubber strip (33); a No. 2 connecting rod (35) is fixedly connected to the bottom of the No. 2 sleeve ring (34), and the bottom of the No. 2 connecting rod (35) is fixedly connected to the inside of the valve tube (13); a counterweight block (38) is fixedly connected to the upper surface of the baffle plate (3) near the No. 1 arc-shaped baffle rod (36).

2. A fire-proof check valve according to claim 1, characterized in that: Four evenly arranged L-shaped positioning blocks (2) are fixedly connected to one side of the mounting plate (1) close to the positioning plate (12), and the L-shaped positioning blocks (2) are located on the outside of the positioning plate (12); a telescopic groove (21) is provided at a position of each L-shaped positioning block (2) corresponding to the positioning plate (12); a spring (22) is fixedly connected in the telescopic groove (21); a pressing block (23) is fixedly connected to one end of the spring (22) close to the positioning plate (12), and the pressing block (23) is slidably connected in the telescopic groove (21); the positioning plate (12) is located between the pressing block (23) and the mounting plate (1).

3. A fire-proof check valve according to claim 2, characterized in that: A pull rod (24) is fixedly connected to one side of the pressure block (23) close to the spring (22), and the pull rod (24) is located inside the spring (22); the pull rod (24) passes through the L-shaped positioning block (2); and a pull ring (25) is fixedly connected to one end of the pull rod (24) away from the spring (22).

4. A fire-proof check valve according to claim 3, characterized in that: The pressure block (23) has a first arc-shaped surface (4) on a side away from the mounting plate (1); the positioning plate (12) has a second arc-shaped surface (41) on a side close to the mounting plate (1), and the first arc-shaped surface (4) and the second arc-shaped surface (41) are used in conjunction with each other.

5. A fire-proof check valve according to claim 4, characterized in that: A first magnet (5) is fixedly connected to one side of the first arc-shaped baffle rod (36) close to the second arc-shaped baffle rod (37); and a second magnet (51) is fixedly connected to one side of the second arc-shaped baffle rod (37) close to the first arc-shaped baffle rod (36).

6. A fire-proof check valve according to claim 5, characterized in that: The mounting plate (1) is provided with a plurality of groups of evenly arranged mounting holes (11).

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