Fastening mechanism and valve

Abstract

The present invention relates to a fastening mechanism and a valve, which solve the problem that the connection structure between the connecting rod and the valve plate is relatively complex. The fastening mechanism is used to connect the connecting mechanism and the valve plate, and includes a stepped bolt and a nut. The stepped bolt sequentially includes a bolt head, a stepped section, and a screw section along its axial direction. The nut is fixedly connected to the screw section, and the nut can abut against the stepped section.

Description

Technical Field

[0001] The present invention relates to a fastening mechanism and a valve. Background Art

[0002] The existing valve includes a valve body with an exhaust port, a valve plate, a connecting rod, and a torsion spring. An exhaust passage is provided on the valve body, and an exhaust port is provided on the exhaust passage. The connecting rod is used to connect the valve plate and the valve body, and the torsion spring is used to drive the connecting rod to rotate relative to the valve body to maintain the tendency of the connecting rod to close the exhaust port through the valve plate.

[0003] The valve (application number: 201510653649.8) further includes a fixing plate. The connecting rod is rotatably connected to the fixing plate, and the fixing plate is fixedly connected to the valve plate. However, the connection structure between the existing connecting rod and the valve plate is relatively complex. Summary of the Invention

[0004] The problem to be solved by the present invention is to provide a fastening mechanism and a valve to simplify the connection structure between the connection mechanism and the valve plate.

[0005] To solve the above problems, the present invention provides the following technical solutions: A fastening mechanism for connecting a connection mechanism and a valve plate, including a stepped bolt and a nut. The stepped bolt sequentially includes a bolt head, a stepped section, and a screw section along its axial direction. The nut is fixedly connected to the screw section and can abut against the stepped section.

[0006] Further, the axial length of the stepped section ≥ 3 mm.

[0007] Further, the locking mechanism further includes an elastic washer, and the elastic washer includes one or more of a spiral elastic washer, a corrugated elastic washer, and a saddle-shaped elastic washer.

[0008] A valve includes a valve body with an exhaust port, a valve plate, a connection mechanism, and a fastening mechanism. The lower end of the connection mechanism is movably arranged on the valve body, the upper end of the connection mechanism is movably connected to the valve plate through the fastening mechanism. The connection mechanism can drive the valve plate to close the exhaust port. The fastening mechanism is the fastening mechanism described in any one of the above technical solutions, and the valve plate is sleeved on the stepped section.

[0009] Further, the valve further includes an adjusting rod, and the adjusting rod passes through the connection mechanism and abuts against the valve plate to adjust the angle of the valve plate moving axially relative to the stepped bolt.

[0010] Further, the connection mechanism includes a connecting rod, and a receiving cavity is provided on the connecting rod, and at least part of the bolt head is located in the receiving cavity.

[0011] Furthermore, the valve body includes a main body with an exhaust port and a valve seat, the upper end of the connecting rod is movably connected to the valve plate through the fastening mechanism, the lower end of the connecting rod is movably arranged on the valve seat, and the valve seat is detachably arranged on the main body.

[0012] Furthermore, the valve also includes a rotating shaft and a torsion spring, the lower end of the connecting rod is rotatably connected to the valve seat via the rotating shaft, the torsion spring is sleeved on the rotating shaft, one torsion arm of the torsion spring is against the wall of the accommodating chamber, and the other torsion arm of the torsion spring is against the valve seat and / or the main body; the spring coil of the torsion spring is located in the accommodating chamber.

[0013] Furthermore, the valve also includes a locking mechanism, a toggle mechanism, an elastic element and a temperature sensing mechanism. The locking mechanism and the toggle mechanism can be movably arranged on the valve body. The locking mechanism has a locking position and an unlocking position. When the locking mechanism is in the locking position, the temperature sensing mechanism is clamped between the locking mechanism and the valve body. After the temperature sensing mechanism is actuated, the elastic element drives the locking mechanism to move from the locking position to the unlocking position through the toggle mechanism. When the locking mechanism is in the unlocking position, the valve plate closes the exhaust port.

[0014] Furthermore, the connecting rod includes a first side plate, a second side plate and a bottom plate for connecting the first side plate and the second side plate, the first side plate, the bottom plate and the second side plate form the accommodating cavity, the first side plate is provided with a first inclined section, and the second side plate is provided with a second inclined section. After the temperature sensing mechanism is actuated, the toggle mechanism can slide along the first inclined section and / or the second inclined section so that the connecting rod closes the exhaust port through the valve plate.

[0015] Beneficial effects of the present invention:

[0016] 1. In the present invention, the fastening mechanism includes a step bolt, which includes a bolt head, a step and a screw section in sequence along its axial direction. When the nut is fixedly connected to the screw section and abuts against the step, the valve plate is sleeved on the step. With this design, the valve plate moves relative to the step to adjust the angle of the valve plate relative to the connecting mechanism.

[0017] 2. In the present invention, the fastening mechanism includes two parts, namely, a stepped bolt and a nut, while the existing connecting mechanism and the valve plate are connected by at least three parts. Therefore, the fastening mechanism of the present invention simplifies the connection structure between the connecting mechanism and the valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional diagram of a valve in a preferred embodiment of the present invention;

[0019] Figure 2is a bottom view of a valve in a preferred embodiment of the present invention;

[0020] Figure 3 yes Figure 2 Sectional view at AA in the middle;

[0021] Figure 4 yes Figure 2 Cross-sectional view at the middle BB (locking mechanism in locked position);

[0022] Figure 5 yes Figure 2 Cross-sectional view at the middle BB (locking mechanism in unlocked position);

[0023] Figure 6 is a three-dimensional diagram of a locking mechanism and a temperature sensing mechanism in a preferred embodiment of the present invention;

[0024] Figure 7 is a cross-sectional view of a locking mechanism and a temperature sensing mechanism in a preferred embodiment of the present invention;

[0025] Figure 8 is a three-dimensional diagram of a valve body in a preferred embodiment of the present invention;

[0026] Figure 9 is a front view of the toggle mechanism in a preferred embodiment of the present invention;

[0027] Figure 10 is a three-dimensional diagram of a second valve seat in a preferred embodiment of the present invention;

[0028] Figure 11 is a three-dimensional diagram of a part of the valve in the preferred embodiment of the present invention (the valve plate and the connecting mechanism are omitted);

[0029] Figure 12 is a three-dimensional diagram of a part of the valve in the preferred embodiment of the present invention (omitting the toggle mechanism);

[0030] Figure 13 is a structural schematic diagram of a fastening mechanism in a preferred embodiment of the present invention;

[0031] Figure 14 is a three-dimensional diagram of a connecting mechanism in a preferred embodiment of the present invention;

[0032] Figure 15 yes Figure 2 Cross-sectional view at AA in the middle (with adjustment rod). DETAILED DESCRIPTION

[0033] The technical solutions of the embodiments of the present invention will be explained and illustrated below with reference to the accompanying drawings of the embodiments of the present invention. However, the following embodiments are only the preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present invention.

[0034] Refer to Figure 3 and Figure 13 , the fastening mechanism 9 is used to connect the connecting mechanism 3 and the valve plate 2, and includes a stepped bolt 91 and a nut 92. The stepped bolt 91 sequentially includes a bolt head 911, a stepped section 912, and a screw section 913 along its axial direction. The nut 92 is fixedly connected to the screw section 913, and the nut 92 can abut against the stepped section 912.

[0035] In this embodiment, the locking mechanism 9 further includes an elastic washer, and the elastic washer is clamped between the connecting mechanism 3 and the valve plate 2. The elastic washer includes one or more of a spiral elastic washer, a corrugated elastic washer, and a saddle-shaped elastic washer.

[0036] Refer to Figure 2 and Figure 3 , the valve includes a valve body 1 having an exhaust port 111, a valve plate 2, and a connecting mechanism 3. The valve body 1, the valve plate 2, and the connecting mechanism 3 are made of metal or other high-temperature resistant materials. The connecting mechanism 3 is used to connect the valve plate 2 and the valve body 1 and can drive the valve plate 2 to close the exhaust port 111.

[0037] From Figure 3 it can be seen that the valve body 1 of this embodiment has an exhaust passage 11, and the exhaust port 111 is arranged on the exhaust passage 11. When the valve plate 2 closes the exhaust port 111, the exhaust passage 11 is located on both sides of the exhaust port 111 and the flow of flue gas cannot be realized. This means that when the valve plate 2 closes the exhaust port 111, the flue gas in the user's room cannot enter the exhaust duct through the valve, and the flue gas in the exhaust duct cannot enter the user's room through the valve. Of course, in the prior art, the valve body may include an annular baffle with an exhaust port, and there is no exhaust passage on such a valve body.

[0038] There are three ways for the connecting mechanism 3 on the valve to close the exhaust port 111 by the valve plate 2: 1. As Figure 3 shown, the valve includes a second elastic element 8, and the second elastic element 8 is one of a second torsion spring, a tension spring, and a compression spring. The second elastic element 8 is used to drive the connecting mechanism 3 to drive the valve plate 1 to move relative to the valve body 1 to maintain the tendency of the valve plate 1 to close the exhaust port 111; 2. The valve plate maintains the tendency to close the exhaust port under the action of its own gravity; 3. The connecting mechanism is eccentrically arranged to maintain the tendency of the valve plate to close the exhaust port.

[0039] Refer to Figure 1 , Figure 6 and Figure 11, in this embodiment, the valve further includes a locking mechanism 4, a toggling mechanism 6, an elastic element, and a temperature sensing mechanism 5. In the present invention, for the convenience of distinction, the elastic element is referred to as the first elastic element 7. The locking mechanism 4 and the toggling mechanism 6 are movably arranged on the valve body 1. The locking mechanism 4 has a locking position and an unlocking position. As Figure 4 shown, when the locking mechanism 4 is in the locking position, the temperature sensing mechanism 5 is clamped between the locking mechanism 4 and the valve body 1. After the temperature sensing mechanism 5 acts, the first elastic element 7 drives the locking mechanism 4 to move from the locking position to the unlocking position through the toggling mechanism 6, as Figure 5 shown. When the locking mechanism 4 is in the unlocking position, the valve plate 2 closes the exhaust port 111.

[0040] The existing valve (for the specific structure, reference can be made to the invention patent with the application number 201610651149.5) includes a valve seat, a lever, a temperature sensing mechanism, and a torsion spring. The temperature sensing mechanism includes a first metal plate, a second metal plate, and a fusible solder for connecting the first metal plate and the second metal plate. The lever and the second metal plate are rotatably connected to the valve seat. One torsion arm of the torsion spring is connected to the valve seat, and the other torsion arm of the torsion spring is connected to the lever and drives the lever to abut against the first metal plate. A limiting member is provided on the valve seat. When the other torsion arm of the torsion spring is connected to the lever and drives the lever to abut against the first metal plate, and the first metal plate and the second metal plate are connected by the fusible solder, the second metal plate abuts against the limiting member to clamp the temperature sensing mechanism between the lever and the limiting member.

[0041] When the temperature sensing mechanism is clamped between the lever and the limiting member, the lever exerts a first acting force on the first metal plate, and the limiting member exerts a second acting force on the second metal plate. The first acting force and the second acting force are equal in magnitude and opposite in direction. In other words, the first acting force maintains the tendency of the first metal plate to move upward relative to the fusible solder, and the second acting force maintains the tendency of the second metal plate to move downward relative to the fusible solder. Since the positions where the lever abuts against the first metal plate and the limiting member abuts against the second metal plate are staggered from each other, the fusible solder is long-term affected by the torsional force. The long-term action of the torsional force on the fusible solder will cause the separation of the first metal plate (or the second metal plate) from the fusible solder. This means that in a normal temperature environment, the temperature sensing mechanism of the valve will automatically fail after being used for a period of time. After the temperature sensing mechanism automatically fails, the torsion spring drives the lever to rotate relative to the valve seat to enable the lever to drive the valve plate to close the exhaust port through the connecting rod.

[0042] In the present invention, the valve includes a locking mechanism 4 and a temperature sensing mechanism 5, and the temperature sensing mechanism 5 is clamped between the locking mechanism 4 and the valve body 1. In the prior art, the temperature sensing mechanism needs to be installed on the valve seat through three steps during the manufacturing process of the valve: step one, the temperature sensing mechanism is set on the valve seat through a fastener; step two, one side of the temperature sensing mechanism is against the limiter; step three, the other side of the temperature sensing mechanism is against the lever. In the present invention, the temperature sensing mechanism 5 is first set on the locking mechanism 4, and then the temperature sensing mechanism 5 is clamped between the locking mechanism 4 and the valve body 1. Through the above two steps, the temperature sensing mechanism 5 completes its installation steps. With such a design, by changing the installation position and installation structure of the temperature sensing mechanism 5, the installation steps of the valve are simplified, the production efficiency of the valve is improved, and the manufacturing cost of the valve is reduced.

[0043] In the present invention, the locking mechanism 4 has a locking position and an unlocking position. After the temperature sensing mechanism 5 is actuated, the first elastic element 7 drives the locking mechanism 4 to move from the locking position to the unlocking position through the toggle mechanism 6. After the valve is replaced with a temperature sensing mechanism 5 of different specifications, the locking position of the locking mechanism 4 will change. With such a design, the position accuracy requirement of the locking mechanism 4 can be appropriately reduced to reduce the manufacturing cost of the valve.

[0044] In the present invention, when the temperature sensing mechanism 5 is clamped between the locking mechanism 4 and the valve body 1, the temperature sensing mechanism 5 is located on the outside of the valve body 1. This structure can prevent smoke from entering the exhaust duct when a fire occurs indoors; when the temperature sensing mechanism 5 is clamped between the locking mechanism 4 and the valve body 1, the temperature sensing mechanism 5 is located on the inside of the valve body 1. This structure can prevent smoke from entering the room through the exhaust duct when a fire occurs outdoors; when the temperature sensing mechanism 5 is clamped between the locking mechanism 4 and the valve body 1, part of the temperature sensing mechanism 5 is located on the outside of the valve body 15, and the remaining part of the temperature sensing mechanism is located on the inside of the valve body 1. This structure can enable the valve to achieve dual smoke isolation indoors and outdoors.

[0045] In this embodiment, after the temperature sensing mechanism 5 is actuated, the toggle mechanism 6 drives the valve plate 2 to close the exhaust port 111 through the connecting mechanism 3. With such a design, the toggle mechanism 6 does not directly contact the valve plate 2 to prevent the valve plate 2 from being deformed by the impact of the toggle mechanism 6. Of course, in other embodiments of the present invention, after the temperature sensing mechanism is actuated, the toggle mechanism may also directly drive the valve plate to close the exhaust port.

[0046] See also Figure 8The valve body 1 is provided with a guide channel for guiding the movement direction of the locking mechanism 4, at least part of the locking mechanism 4 is arranged in the guide channel, and when the locking mechanism 4 is in the locked position or the unlocked position, at least one end face of the locking mechanism 4 is located outside the guide channel. Such a design facilitates the removal of the locking mechanism 4 from the guide channel, and facilitates the arrangement of part of the temperature sensing mechanism 5 on the outside of the valve body 1 and the arrangement of the remaining part of the temperature sensing mechanism 5 on the inside of the valve body 1. In other embodiments of the present invention, the locking mechanism can be welded inside the valve body, and a space for clamping the temperature sensing mechanism is reserved between the locking mechanism and the side wall of the valve body.

[0047] Preferably, the valve body 1 includes a first exhaust pipe 101, a second exhaust pipe 103 and an annular baffle 102 that can abut against the valve plate 2. The first exhaust pipe 101 and the second exhaust pipe 103 are connected through the annular baffle 102. The annular baffle 102 surrounds an exhaust port 111. The annular baffle 102 is provided with a guide hole 12, which is the guide channel. The locking mechanism 4 includes a locking rod, which passes through the guide hole 12. With such a design, the temperature sensing mechanism 5 can be arranged on the outside of the valve body 1 or on the inside of the valve body 1, which means that the valve can achieve dual indoor and outdoor smoke isolation by setting a set of toggle mechanisms 6. In addition, in other embodiments of the present invention, the guide channel can also be set at other positions of the valve body by changing its shape. For example, a guide seat is provided on the inside of the valve body, and a guide groove is provided on the guide seat. The top of the guide groove is open, and two opposite openings are provided on the side wall of the guide groove. The guide groove is the guide channel.

[0048] In this embodiment, when the temperature sensing mechanism 5 is clamped between the locking mechanism 4 and the valve body 1, part of the temperature sensing mechanism 5 is located on the outside of the valve body 1, and the remaining part of the temperature sensing mechanism 1 is located on the inside of the valve body 1. With such a design, the valve can be used for both indoor and outdoor smoke isolation. Of course, in other embodiments of the present invention, when the temperature sensing mechanism is clamped between the locking mechanism and the valve body, the temperature sensing mechanism can be located only on the outside of the valve body; or, when the temperature sensing mechanism is clamped between the locking mechanism and the valve body, the temperature sensing mechanism can be located only on the inside of the valve body.

[0049] See also Figure 6 A fixing portion is provided at one end of the locking rod, and the temperature sensing mechanism 5 is clamped between the fixing portion and the annular baffle 102. Figure 7 It is not difficult to see that the locking rod includes a screw, the axial length of the screw rod 42 is greater than the sum of the lengths of the brazing ring 51 and the guide hole 12, the fixing portion is the head 41 of the screw, the temperature sensing mechanism 5 includes at least one brazing ring 51 sleeved on the locking rod, the brazing ring 51 has a mounting hole 511, and when the screw rod 42 passes through the mounting hole 511, the brazing ring 51 is clamped between the screw head 41 and the annular baffle 102. In other embodiments of the present invention, the locking mechanism includes a bolt and a nut, and the bolt passes through the brazing ring and the first metal plate and is fixedly connected to the nut.

[0050] Furthermore, in other embodiments of the present invention, the temperature sensing mechanism may include at least one solder plate, and the solder plate is clamped between the head of the screw and the annular baffle.

[0051] In this embodiment, a solder ring is clamped between the head 41 of the screw and the annular baffle 102, but in other embodiments of the present invention, the number of solder rings clamped between the fixing portion and the annular baffle can be adjusted according to actual needs.

[0052] See also Figure 6 The temperature sensing mechanism 5 further includes a first metal plate 521, a second metal plate 523 and a brazing member 522 for connecting the first metal plate 521 and the second metal plate 523. The first metal plate 521 is detachably arranged at the other end of the locking rod, and a rotation stop 5231 is arranged on the second metal plate 523. When the locking mechanism 4 is located at the locking position, the rotation stop 5231 is engaged with the toggle mechanism 6 to prevent the first elastic element 7 from driving the toggle mechanism 6 to move relative to the valve body 1. In other embodiments of the present invention, the temperature sensing mechanism further includes a brazing rod, one end of the brazing rod is clamped between the locking rod and the valve body, and the other end of the brazing rod is provided with a rotation stop. When the locking mechanism is located at the locking position, the rotation stop is engaged with the toggle mechanism to prevent the first elastic element from driving the toggle mechanism to move relative to the valve body. The first metal plate 521, the second metal plate 523 and the brazing member 522 form a temperature sensing unit 52, and the temperature sensing unit 52 and the brazing ring 51 form a temperature sensing mechanism 5. When a fire occurs indoors, the brazing ring 51 melts, and the locking rod axially moves from the locked position to the unlocked position, so that the valve plate 2 closes the exhaust port 111. When a fire occurs outdoors, the brazing member 522 melts, and the first metal plate 521 separates from the second metal plate 523, so that the valve plate 2 closes the exhaust port 111.

[0053] In this embodiment, the height of the anti-rotation portion 5231 is H1, and the axial length of the solder ring 51 is H3, where H1<H3. With such a design, after the solder ring 51 melts, the axial movement range of the locking mechanism 4 relative to the valve body 1 is greater than H1, which means that when the locking mechanism 4 moves from the locked position to the unlocked position, the anti-rotation portion 5231 will be separated from the toggle mechanism 6.

[0054] In this embodiment, the solder ring 51 and the solder piece 522 can be one or more solders selected from the group consisting of bismuth-based, indium-based, tin-based, cadmium-based, zinc-based and lead-based solders.

[0055] It is not difficult to conclude from the above description that the action of the temperature sensing mechanism 5 includes the melting action of the temperature sensing mechanism 5. In other embodiments of the present invention, the temperature sensing mechanism may include a memory metal, which is clamped between the locking mechanism and the valve body. After the memory metal is deformed (the deformation action includes but is not limited to the bending of the memory metal under pressure and the change of the thickness of the memory metal under pressure), the first elastic element drives the locking mechanism to move from the locked position to the unlocked position through the toggle mechanism. When the locking mechanism is in the unlocked position, the valve plate closes the exhaust port.

[0056] In this embodiment, the first metal plate 521 can be detachably set on the other end of the locking rod by means of snap-on, screw-on, hinged, etc. Preferably, a fixing section 5211 is provided on the first metal plate 521, and a threaded hole matching the rod portion 42 of the screw is provided on the fixing section 5211. Therefore, the rod portion 42 of the screw passes through the threaded hole to realize the fixed connection between the rod portion 42 of the screw and the first metal plate 521.

[0057] See also Figure 3 and Figure 13 The valve further comprises a fastening mechanism 9, the lower end of the connecting mechanism 3 is movably arranged on the valve body 1, and the upper end of the connecting mechanism 3 is movably connected to the valve plate 2 through the fastening mechanism 9. Specifically, the connecting mechanism 3 comprises a connecting rod 31, the lower end of the connecting rod 31 is rotatably connected to the valve body 1, and the upper end of the connecting rod 31 is movably connected to the valve plate 2 through the fastening mechanism 9. In addition, in other embodiments of the present invention, the lower end of the connecting rod can slide along the slide rail on the valve body to realize the valve plate closing the exhaust port, and the upper end of the connecting rod is rotatably connected to the valve plate.

[0058] The step bolt 91 passes through the connecting rod 31 and the valve plate 2 in sequence and is fixedly connected to the nut 92. When the nut 92 is fixedly connected to the screw segment 913 and the nut 92 abuts against the step stage 912, the valve plate 2 sleeved on the step stage 912 can move relative to the connecting rod 31.

[0059] Preferably, the axial length of the stage 912 is ≥3 mm. In this design, the axial length of the stage 912 is greater than the sum of the thickness of the valve plate 2 and the thickness of the connecting rod 3, so that the valve plate 2 can move relative to the connecting mechanism 3.

[0060] See also Figure 15 The valve further includes an adjusting rod 100, which penetrates the connecting mechanism 3 and abuts against the valve plate 2 to adjust the axial movement angle of the valve plate 2 relative to the step bolt 91. Such a design can prevent the valve plate 2 from being unable to close the exhaust port 111 due to the excessive axial length of the step 912.

[0061] Preferably, the adjusting rod 100 is an adjusting screw that can penetrate the connecting rod 31, and the adjusting screw is located above the step bolt 91 (the above includes but is not limited to directly above and laterally above). In other embodiments of the present invention, when the connecting mechanism includes an adjusting nut arranged on the connecting rod, the adjusting rod can also be an adjusting bolt.

[0062] See also Figure 14 The connecting rod 31 is provided with a receiving cavity 311, and at least part of the bolt head 911 is located in the receiving cavity 311. Such a design prevents the bolt head 911 from colliding with an external object, thereby preventing the step bolt 91 from working properly.

[0063] In this embodiment, the valve body 1 includes a main body with an exhaust port 111 and a valve seat 107. The upper end of the connecting rod 31 is movably connected to the valve plate 2 through a fastening mechanism 9. The lower end of the connecting rod 31 is movably arranged on the valve seat 107. The valve seat 107 is detachably arranged on the main body.

[0064] Preferably, the valve seat 107 is fixedly connected to the body by fastening screws 30. In other embodiments of the present invention, the valve seat 107 is snap-connected to the body.

[0065] Preferably, the connecting rod 31 is rotatably connected to the valve seat 107 via the rotating shaft 10. In other embodiments of the present invention, one of the connecting rod and the valve seat is provided with a rotating shaft, and the other is provided with an axial hole, and the rotating shaft can be inserted into the axial hole.

[0066] The second elastic element 8 is a second torsion spring, the spring coil 81 of the second torsion spring is sleeved on the rotating shaft 10, one torsion arm 82 of the second torsion spring is against the wall of the accommodating chamber 311, and the other torsion arm 83 of the second torsion spring is against the valve seat 107 and / or the body; the spring coil 81 of the second torsion spring is located in the accommodating chamber 311.

[0067] See also Figure 12 and Figure 14 The connecting rod 31 includes a first side plate 302, a second side plate 303 and a bottom plate 301 for connecting the first side plate 302 and the second side plate 303. The first side plate 302, the bottom plate 301 and the second side plate 303 form a receiving cavity 311. The first side plate 302 is provided with a first inclined section 3021, and the second side plate 303 is provided with a second inclined section 3031. After the temperature sensing mechanism 5 is actuated, the toggle mechanism 6 can slide forward along the first inclined section 3021 and / or the second inclined section 3031, so that the connecting rod 31 closes the exhaust port 111 through the valve plate 2. With such a design, the movement direction of the toggle mechanism 6 is limited.

[0068] In this embodiment, at least one protrusion for preventing the lever from sliding in the reverse direction thereof is provided on the first inclined section 3021 and / or the second inclined section 3031. Such a design effectively prevents the valve plate 2 from opening the exhaust port 111 under the action of the high-temperature airflow.

[0069] Preferably, the protrusion is an inverted tooth, and with such a design, the lever cannot slide in the reverse direction. In other embodiments of the present invention, the protrusion may be a boss.

[0070] See also Figure 9 and Figure 11 The toggle mechanism 6 includes a toggle rod transversely arranged on the valve body 1, a transition portion is arranged at the edge of the toggle rod, and the middle position of the toggle rod protrudes outward. In other embodiments of the present invention, the toggle mechanism includes an arc plate, a rotating rod, and a fastener for connecting the arc plate and the rotating rod.

[0071] See also Figure 9 , the lever is provided with a receiving cavity for limiting the installation position of the temperature sensing element 5, specifically: a positioning groove 611 is provided on the outer wall of the lever, the positioning groove 611 is the receiving cavity, and when the anti-rotation portion 5231 is engaged with the lever, the second metal plate 523 is located in the positioning groove 611. Such a design effectively limits the position where the second metal plate 523 is engaged with the toggle mechanism 6. In other embodiments of the present invention, the lever is provided with a positioning hole, the positioning hole is the receiving cavity, and the second metal plate can be inserted into the positioning hole.

[0072] Preferably, the depth of the positioning groove 611 is H2, where H2>the thickness of the second metal plate 523.

[0073] from Figure 9 It can be seen that the middle position of the lever is provided with an arc segment 61 for connecting the adapter, and the outer side wall of the arc segment is arc-shaped. Such a design can prevent the lever from interfering with the valve body 1 during movement.

[0074] In this embodiment, the adapter includes a shaft section 62 and a clamping section 63, and the first elastic element 7 is sleeved on the clamping section 63. Of course, in other embodiments of the present invention, the adapter may only include a shaft section, or the adapter may only include a shaft hole section.

[0075] See also Figure 3 and Figure 10 In this embodiment, the lever is arranged on the body through the lever seat 106 .

[0076] 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. A valve, comprising a valve body having an exhaust port, a valve plate, a connecting mechanism and a fastening mechanism. The valve plate is made of metal. The lower end of the connecting mechanism is movably disposed on the valve body, and the upper end of the connecting mechanism is movably connected to the valve plate through the fastening mechanism. The connecting mechanism can drive the valve plate to close the exhaust port, characterized in that, The fastening mechanism is used to connect the connection mechanism and the valve plate, and is characterized in that it comprises a step bolt and a nut, wherein the step bolt comprises a bolt head, a step stage and a screw section in sequence along its axial direction, the nut is fixedly connected to the screw section, and the nut can abut against the step stage, the valve plate is sleeved on the step stage, and the valve plate moves relative to the step stage to adjust the angle of the valve plate relative to the connection mechanism; The valve further comprises an adjusting rod, which penetrates through the connecting mechanism and abuts against the valve plate to adjust the axial movement angle of the valve plate relative to the step bolt.

2. The valve according to claim 1, characterized in that, The axial length of the stage is ≥3 mm.

3. The valve according to claim 1, characterized in that, The fastening mechanism further comprises an elastic washer, and the elastic washer comprises one or more of a spiral elastic washer, a wave elastic washer and a saddle-shaped elastic washer.

4. The valve according to claim 1, characterized in that, The connecting mechanism comprises a connecting rod, a receiving cavity is provided on the connecting rod, and at least a part of the bolt head is located in the receiving cavity.

5. The valve according to claim 4, characterized in that, The valve body comprises a main body with an exhaust port and a valve seat, the upper end of the connecting rod is movably connected to the valve plate through the fastening mechanism, the lower end of the connecting rod is movably arranged on the valve seat, and the valve seat is detachably arranged on the main body.

6. The valve according to claim 5, characterized in that, The valve also includes a rotating shaft and a torsion spring. The lower end of the connecting rod is rotatably connected to the valve seat via the rotating shaft. The torsion spring is sleeved on the rotating shaft. One torsion arm of the torsion spring abuts against the wall of the accommodating chamber, and the other torsion arm of the torsion spring abuts against the valve seat and / or the body. The spring coil of the torsion spring is located in the accommodating chamber.

7. The valve according to claim 4, characterized in that, The valve also includes a locking mechanism, a toggle mechanism, an elastic element and a temperature sensing mechanism. The locking mechanism and the toggle mechanism are movably arranged on the valve body. The locking mechanism has a locking position and an unlocking position. When the locking mechanism is located at the locking position, the temperature sensing mechanism is clamped between the locking mechanism and the valve body. After the temperature sensing mechanism is actuated, the elastic element drives the locking mechanism to move from the locking position to the unlocking position through the toggle mechanism. When the locking mechanism is located at the unlocking position, the valve plate closes the exhaust port.

8. The valve according to claim 7, characterized in that, The connecting rod includes a first side plate, a second side plate and a bottom plate for connecting the first side plate and the second side plate, the first side plate, the bottom plate and the second side plate form the accommodating cavity, the first side plate is provided with a first inclined section, the second side plate is provided with a second inclined section, after the temperature sensing mechanism is actuated, the toggle mechanism can slide along the first inclined section and / or the second inclined section so that the connecting rod closes the exhaust port through the valve plate.

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