Torque adjustment mechanism and fire check valve

Abstract

The present invention relates to a torque adjustment mechanism and a fire check valve to adjust the difficulty of opening valve plates on valves on different floors. The torque adjustment mechanism comprises a first connecting plate for connecting a valve body and an adjustment plate arranged on the inner side of the first connecting plate, the first connecting plate is provided with a first connecting portion, the adjustment plate is provided with at least two torque adjustment grooves for clamping a torsion arm on a first torsion spring, and at least two of the torque adjustment grooves are arranged vertically.

Description

Technical Field

[0001] The invention relates to a torque regulating mechanism and a fire-proof check valve. Background Art

[0002] The existing valve includes a valve body, a valve plate, a connecting rod and a torsion spring. The valve body has an exhaust port. The upper end of the connecting rod is rotatably connected to the valve plate, and the lower end of the connecting rod is rotatably connected to the valve body. One torsion arm of the torsion spring is arranged on the connecting rod, and the other torsion arm of the torsion spring is arranged on the valve body. The torsion spring is used to drive the connecting rod to drive the valve plate to close the exhaust port.

[0003] There is an exhaust duct in the residential building, and each floor has a mounting hole for connecting the exhaust duct, and the valve is set on the mounting hole. The gas pressure values ​​of the existing exhaust duct at different heights are also different. Generally speaking, the thrust required to open the valve plate of the valve located above the exhaust duct is less than the thrust required to open the valve plate of the valve located below the exhaust duct.

[0004] However, the force of the existing torsion spring on the connecting rod is constant, which makes it difficult for the valve plate of a high-rise residential building to open the exhaust port, resulting in difficulty in exhausting indoor smoke, and the valve plate of a low-rise residential building is easily opened, resulting in outdoor smoke flowing back into the room. Summary of the invention

[0005] The problem to be solved by the present invention is to provide a torque regulating mechanism and a fire-proof check valve to adjust the difficulty of opening valve plates on valves on different floors.

[0006] To solve the above problems, the present invention provides the following technical solutions:

[0007] The torque adjustment mechanism includes a first connecting plate for connecting the valve body and an adjustment plate arranged on the inner side of the first connecting plate, the bottom end surface of the adjustment plate is located above the bottom end surface of the first connecting plate in the vertical direction, the first connecting plate is provided with a first connecting portion, and the adjustment plate is provided with at least two torque adjustment grooves for clamping the torsion arm on the first torsion spring, and at least two of the torque adjustment grooves are vertically arranged.

[0008] In the present invention, the first torsion spring can be inserted into different torsion adjustment grooves to change the force of the connecting rod mechanism to close the valve plate. When the force of the first torsion spring acting on the connecting rod mechanism can be adjusted, the connecting rod mechanism can change the force of the connecting rod mechanism to drive the valve plate to close the exhaust port according to the wind pressure in the flue on different floors. Such a design can avoid the valve plate of the valve in the high wind pressure area from being unable to open the exhaust port, and also avoid the valve plate of the valve in the low wind pressure area from being unable to close the exhaust port.

[0009] In addition, in the present invention, the torque adjustment groove is arranged on the adjustment plate, and the adjustment plate is arranged on the torque adjustment mechanism, which means that the existing fire check valve does not need to change its structure, and only needs to change the structure of the torque adjustment mechanism to achieve the change of the force of the connecting rod mechanism to close the valve plate. Such a design greatly saves the cost required for the performance upgrade of the fire check valve.

[0010] In the present invention, the bottom end surface of the adjustment plate is located above the bottom end surface of the first connecting plate in the vertical direction. This structure prevents the torsion arm of the first torsion spring from being difficult to insert into the torsion adjustment slot.

[0011] Furthermore, the minimum spacing distance between two adjacent torque adjustment grooves is ≥2mm, and this structure reduces the probability of deformation of the adjustment plate when the torsion arm on the first torsion spring passes through the torque adjustment groove; the maximum spacing distance between two adjacent torque adjustment grooves is ≤20mm, and this structure increases the number of torque adjustment grooves that can be set on the adjustment plate (when the adjustment plate does not interfere with other structures on the valve).

[0012] Furthermore, the torque adjustment mechanism also includes a stop plate for connecting the temperature sensing mechanism, and the stop plate is arranged on the inner side of the first connecting plate. This structure is used to reduce the probability of interference between the stop plate and other components on the valve.

[0013] In addition, when the temperature sensing mechanism is set on the stop plate and the upper torsion arm of the first torsion spring is set on the adjusting plate, the balancing performance of the first connecting plate will be improved to a certain extent, especially when the temperature sensing mechanism provides an upward force for the stop plate and the upper torsion arm of the first torsion spring provides an upward force for the adjusting plate.

[0014] Furthermore, the adjustment plate is arranged at the head end of the first connecting plate, the stop plate is arranged at the end of the first connecting plate, and the spacing distance between the first connecting portion and the stop plate is greater than the spacing distance between the first connecting portion and the adjustment plate. Since the force transmitted to the stop plate by the temperature sensing mechanism is greater than the force transmitted to the adjustment plate by the torsion arm on the first torsion spring, when the spacing distance between the first connecting portion and the stop plate is greater than the spacing distance between the first connecting portion and the adjustment plate, the difference between "the force transmitted to the connecting rod mechanism by the stop plate through the first connecting plate" and "the force transmitted to the connecting rod mechanism by the adjustment plate through the first connecting plate" will be reduced.

[0015] Furthermore, a slot is provided at the bottom of the stop plate, a protrusion is provided at the top of the stop plate, and a positioning hole is provided on the protrusion. The slot is used to connect the temperature sensing mechanism, and the protrusion is used to increase the anti-deformation ability of the slot and the positioning hole.

[0016] Further, the first connecting plate includes a first straight section and a first inclined section connected to the first straight section, the first connecting portion is a first mounting hole provided on the first inclined section, the stop plate is provided inside the first straight section, and the adjustment plate is provided inside the first inclined section. The first inclined section is used to increase the height of the adjustment plate and the first mounting hole to reduce the difficulty of installing the torsion arm on the first torsion spring and the difficulty of installing the torque adjustment mechanism; the first straight section is used to reduce the height of the stop plate and increase the difficulty of the stop plate moving upward (the upward movement of the stop plate will cause the first straight section to abut against the inner wall of the valve body).

[0017] Furthermore, the torque adjustment mechanism further includes a second connecting plate, the second connecting plate is provided with a second connecting portion, and the stop plate is also arranged on the inner side of the second connecting plate. This structure further reduces the probability of interference between the stop plate and other components on the valve; at the same time, arranging the stop plate on the inner side of the second connecting plate helps to increase the stability and anti-deformation ability of the stop plate, so as to reduce the probability of the groove being tilted.

[0018] Furthermore, the second connecting plate includes a second straight section and a second inclined section connected to the second straight section, the second connecting portion is a second mounting hole provided on the second inclined section, and the stop plate is provided inside the second straight section. The second inclined section is used to increase the height of the second mounting hole to reduce the difficulty of installing the torque adjustment mechanism; the second straight section is used to reduce the height of the stop plate and increase the difficulty of the stop plate moving upward.

[0019] Further, the bottom of the first connecting plate is provided with a first baffle extending inwardly and used to abut the valve seat or the inner wall of the valve body; or, the bottom of the first connecting plate is provided with a third baffle extending outwardly and used to abut the valve seat or the inner wall of the valve body; or, the bottom of the first connecting plate is provided with a first baffle extending inwardly and used to abut the valve seat or the inner wall of the valve body and a third baffle extending outwardly and used to abut the valve seat or the inner wall of the valve body; or, the bottom of the second connecting plate is provided with a second baffle extending inwardly and used to abut the valve seat or the inner wall of the valve body; or, the bottom of the second connecting plate is provided with a fourth baffle extending outwardly and used to abut the valve seat or the inner wall of the valve body; or, the bottom of the second connecting plate is provided with a second baffle extending inwardly and used to abut the valve seat or the inner wall of the valve body and a fourth baffle extending outwardly and used to abut the valve seat or the inner wall of the valve body. The first baffle, the second baffle, the third baffle and the fourth baffle have the following advantages: 1. The first baffle, the second baffle, the third baffle and the fourth baffle abut against the valve seat to prevent the torsion arm on the first torsion spring from driving the torque adjustment mechanism to rotate counterclockwise; 2. The first baffle, the second baffle, the third baffle and the fourth baffle abut against the inner wall of the valve body to prevent the torque adjustment mechanism from pulling the paddle to rotate clockwise through the temperature sensing mechanism. In addition, the first baffle and the second baffle also have the following advantages: 3. The stop plate is arranged on the inner side of the first connecting plate to prevent the stop plate from interfering with other parts of the valve during movement; 4. The stop plate is arranged on the inner side of the first connecting plate to reduce the volume of the torque adjustment mechanism.

[0020] Furthermore, the adjustment plate, the first connection plate, the stop plate and the second connection plate are formed by bending a metal plate three times. This structure reduces the manufacturing cost and processing time of the torque adjustment mechanism.

[0021] The fireproof check valve includes a valve body, a valve plate, a connecting rod mechanism, a paddle, a temperature sensing mechanism, a first torsion spring, a second torsion spring and a torque adjustment mechanism, the valve body having an exhaust port, a valve seat being provided on the inner wall of the valve body, the valve plate being movably arranged at the upper end of the connecting rod mechanism, the lower end of the connecting rod mechanism being movably arranged on the valve seat, the paddle being movably arranged on the valve seat, the torque adjustment mechanism being the torque adjustment mechanism described in any one of the above technical solutions, the torque adjustment mechanism being fixedly connected to the valve seat, the temperature sensing mechanism being arranged on the torque adjustment mechanism, the first torsion spring being arranged on the connecting rod mechanism, a torsion arm of the first torsion spring being arranged on the torsion adjustment mechanism, the other torsion arm of the first torsion spring being arranged on the connecting rod mechanism and being used to drive the connecting rod mechanism to drive the valve plate to close the exhaust port, the second torsion spring being arranged on the paddle and being used to drive the paddle to resist the temperature sensing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a first stereoscopic diagram of the torque adjustment mechanism in the first embodiment of the present invention;

[0023] Figure 2 is a second stereoscopic diagram of the torque adjustment mechanism in the first embodiment of the present invention;

[0024] Figure 3 is a front view of the torque adjustment mechanism in the first embodiment of the present invention;

[0025] Figure 4 is a three-dimensional diagram of a fire-proof check valve in Embodiment 2 of the present invention;

[0026] Figure 5 It is a three-dimensional diagram of the fire-proof check valve in the second embodiment of the present invention (without the valve plate). DETAILED DESCRIPTION

[0027] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0028] Embodiment 1

[0029] See also Figure 2 The torque adjustment mechanism 100 includes a first connecting plate 1 for connecting the valve body and an adjustment plate 4 arranged on the inner side of the first connecting plate 1, the bottom end surface of the adjustment plate 4 is located above the bottom end surface of the first connecting plate 4 in the vertical direction, the first connecting plate 1 is provided with a first connecting portion 11, and the adjustment plate 4 is provided with at least two torque adjustment grooves 41 for clamping the torsion arm on the first torsion spring, and at least two torque adjustment grooves 41 are vertically arranged.

[0030] like Figure 3 As shown, the minimum spacing distance between two adjacent torque adjustment grooves 41 is H1, H1 ≥ 2 mm, and the maximum spacing distance between two adjacent torque adjustment grooves 42 is H2, H2 ≤ 20 mm.

[0031] See also Figure 1 The torque adjustment mechanism 100 also includes a stop plate 2 for connecting the temperature sensing mechanism, and the stop plate 2 is arranged on the inner side of the first connecting plate 1. Specifically: the first connecting plate 1 includes a first straight section 101 and a first inclined section 102 connected to the first straight section 101, the first connecting portion 11 is a first mounting hole arranged on the first inclined section 102, the stop plate 2 is arranged on the inner side of the first straight section 101, and the adjustment plate 4 is arranged on the inner side of the first inclined section 102.

[0032] In this embodiment, the adjustment plate 4 is arranged at the head end of the first connecting plate 1 , the stop plate 2 is arranged at the end of the first connecting plate 1 , and the spacing distance between the first connecting portion 11 and the stop plate 2 is greater than the spacing distance between the first connecting portion 11 and the adjustment plate 4 .

[0033] See also Figure 1 A slot 21 is provided at the bottom of the stop plate 2 , a protrusion 22 is provided at the top of the stop plate 2 , and a positioning hole 221 is provided on the protrusion 22 .

[0034] See also Figure 1 The torque adjustment mechanism 100 also includes a second connecting plate 3, a second connecting portion 31 is provided on the second connecting plate 3, and the stop plate 2 is also arranged on the inner side of the second connecting plate 3. Specifically: the second connecting plate 3 includes a second straight section 301 and a second inclined section 302 connected to the second straight section 301, the second connecting portion 31 is a second mounting hole arranged on the second inclined section 302, and the stop plate 2 is arranged on the inner side of the second straight section 301.

[0035] In this embodiment, the first connecting plate 1 is provided with a first baffle 11 extending inwards and used to abut against the valve seat or the inner wall of the valve body at the bottom, and the second connecting plate is provided with a second baffle extending inwards and used to abut against the valve seat or the inner wall of the valve body at the bottom. In other embodiments of the present invention, the first connecting plate is provided with a third baffle extending outwards and used to abut against the valve seat or the inner wall of the valve body at the bottom; or, the first connecting plate is provided with a first baffle extending inwards and used to abut against the valve seat or the inner wall of the valve body and a third baffle extending outwards and used to abut against the valve seat or the inner wall of the valve body at the bottom; or, the second connecting plate is provided with a fourth baffle extending outwards and used to abut against the valve seat or the inner wall of the valve body at the bottom; or, the second connecting plate is provided with a second baffle extending inwards and used to abut against the valve seat or the inner wall of the valve body and a fourth baffle extending outwards and used to abut against the valve seat or the inner wall of the valve body at the bottom.

[0036] like Figure 2 As shown, the adjusting plate 4, the first connecting plate 1, the stop plate 2 and the second connecting plate 3 are formed by bending a metal plate three times.

[0037] Embodiment 2

[0038] See also Figure 4 and Figure 5The fireproof check valve includes a valve body 200, a valve plate 300, a connecting rod mechanism 400, a paddle 800, a temperature sensing mechanism 900, a first torsion spring 500, a second torsion spring 700 and a torque adjustment mechanism. The valve body 200 has an exhaust port 201, a valve seat 2001 is provided on the inner wall of the valve body 200, the valve plate 300 is movably arranged at the upper end of the connecting rod mechanism 400, the lower end of the connecting rod mechanism 400 is movably arranged on the valve seat 2001, the paddle 800 is movably arranged on the valve seat 2001, and the torque adjustment mechanism is the torque adjustment mechanism of the first embodiment. 100, the torque adjustment mechanism 100 is fixedly connected to the valve seat 2001, the temperature sensing mechanism 900 is arranged on the torque adjustment mechanism 100, the first torsion spring 500 is arranged on the connecting rod mechanism 400, one torsion arm of the first torsion spring 500 is arranged on the torque adjustment mechanism 100, the other torsion arm of the first torsion spring 500 is arranged on the connecting rod mechanism 400 and is used to drive the connecting rod mechanism 400 to drive the valve plate 300 to close the exhaust port 201, and the second torsion spring 700 is arranged on the paddle 800 and is used to drive the paddle 800 to resist the temperature sensing mechanism 800.

[0039] In the present invention, the structure of the temperature sensing mechanism 900 can refer to the fuse mechanism in Application No. 2018213359783, the temperature sensing element in Application No. 2017101473542, and the temperature sensing mechanism in Application No. 2018213373687.

[0040] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. Torque adjustment mechanism, characterized in that: The invention comprises a first connecting plate for connecting the valve body and an adjusting plate arranged on the inner side of the first connecting plate, wherein the bottom end surface of the adjusting plate is located above the bottom end surface of the first connecting plate in the vertical direction, the first connecting plate is provided with a first connecting portion, and the adjusting plate is provided with at least two torsion adjusting grooves for clamping the torsion arm on the first torsion spring, and at least two of the torsion adjusting grooves are arranged vertically; The torque adjustment mechanism further comprises a stop plate for connecting the temperature sensing mechanism, wherein the stop plate is arranged on the inner side of the first connecting plate; The bottom of the stop plate is provided with a slot, the top of the stop plate is provided with a protrusion, and the protrusion is provided with a positioning hole; the first connecting plate includes a first straight section and a first inclined section connected to the first straight section, the stop plate is arranged on the inner side of the first straight section, and the adjustment plate is arranged on the inner side of the first inclined section; Among them, the card slot is used to connect the temperature sensing mechanism.

2. The torque adjustment mechanism according to claim 1, characterized in that: The minimum spacing distance between two adjacent torque adjustment grooves is ≥2mm, and the maximum spacing distance between two adjacent torque adjustment grooves is ≤20mm.

3. The torque adjustment mechanism according to claim 1, characterized in that: The adjusting plate is arranged at the head end of the first connecting plate, the stopping plate is arranged at the end of the first connecting plate, and the spacing distance between the first connecting portion and the stopping plate is greater than the spacing distance between the first connecting portion and the adjusting plate.

4. The torque adjustment mechanism according to claim 1, characterized in that: The first connecting portion is a first mounting hole provided on the first inclined section.

5. The torque adjustment mechanism according to claim 1, characterized in that: The torque adjustment mechanism further includes a second connecting plate, on which a second connecting portion is provided, and the stop plate is also arranged on the inner side of the second connecting plate.

6. The torque adjustment mechanism according to claim 5, characterized in that: The second connecting plate includes a second straight section and a second inclined section connected to the second straight section, the second connecting portion is a second mounting hole arranged on the second inclined section, and the stop plate is arranged on the inner side of the second straight section.

7. The torque adjustment mechanism according to claim 5, characterized in that: The first connecting plate is provided with a first baffle plate extending inwardly and used to abut the valve seat or the inner wall of the valve body at the bottom; or, the first connecting plate is provided with a third baffle plate extending outwardly and used to abut the valve seat or the inner wall of the valve body at the bottom; or, the first connecting plate is provided with a first baffle plate extending inwardly and used to abut the valve seat or the inner wall of the valve body and a third baffle plate extending outwardly and used to abut the valve seat or the inner wall of the valve body at the bottom; or, the second connecting plate is provided with a second baffle plate extending inwardly and used to abut the valve seat or the inner wall of the valve body at the bottom; or, the second connecting plate is provided with a fourth baffle plate extending outwardly and used to abut the valve seat or the inner wall of the valve body at the bottom; or, the second connecting plate is provided with a second baffle plate extending inwardly and used to abut the valve seat or the inner wall of the valve body and a fourth baffle plate extending outwardly and used to abut the valve seat or the inner wall of the valve body at the bottom.

8. The torque adjustment mechanism according to claim 5, characterized in that: The adjusting plate, the first connecting plate, the stopping plate and the second connecting plate are formed by bending a metal plate three times.

9. Fire check valve, characterized in that: The valve body comprises a valve plate, a connecting rod mechanism, a paddle, a temperature sensing mechanism, a first torsion spring, a second torsion spring and a torque adjustment mechanism, the valve body having an exhaust port, a valve seat being arranged on the inner wall of the valve body, the valve plate being movably arranged at the upper end of the connecting rod mechanism, the lower end of the connecting rod mechanism being movably arranged on the valve seat, the paddle being movably arranged on the valve seat, the torque adjustment mechanism being the torque adjustment mechanism according to any one of claims 1 to 8, the torque adjustment mechanism being fixedly connected to the valve seat, the temperature sensing mechanism being arranged on the torque adjustment mechanism, the first torsion spring being arranged on the connecting rod mechanism, a torsion arm of the first torsion spring being arranged on the torsion adjustment mechanism, the other torsion arm of the first torsion spring being arranged on the connecting rod mechanism and being used for driving the connecting rod mechanism to drive the valve plate to close the exhaust port, the second torsion spring being arranged on the paddle and being used for driving the paddle to resist the temperature sensing mechanism.

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