Valve body and valve

Abstract

The present invention relates to a valve body and a valve, which solve the problem of poor smoke exhaust effect of the valve. The valve body includes a first exhaust pipe, a second exhaust pipe and an annular baffle that can abut against the valve plate. The first exhaust pipe and the second exhaust pipe are connected through the annular baffle. The annular baffle encloses an exhaust port. The inner diameter of the first exhaust pipe < the width of the valve plate < the inner diameter of the second exhaust pipe.

Description

Technical Field

[0001] The invention relates to a valve body 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. The valve body is provided with an exhaust passage, the exhaust passage is provided with an exhaust port, 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. However, the existing valve plate is arranged in the exhaust passage, which reduces the space of the exhaust passage for exhaust in the radial direction. Summary of the invention

[0003] The problem to be solved by the present invention is to provide a valve body and a valve to increase the smoke exhaust effect of the valve.

[0004] To solve the above problems, the present invention provides the following technical solutions: a valve body, comprising a first exhaust pipe, a second exhaust pipe and an annular baffle that can be abutted against a valve plate, the first exhaust pipe, the second exhaust pipe and the annular baffle are made of metal, the first exhaust pipe and the second exhaust pipe are connected through the annular baffle, the annular baffle forms an exhaust port, and the inner diameter of the first exhaust pipe is less than the width of the valve plate and less than the inner diameter of the second exhaust pipe.

[0005] Furthermore, the first exhaust pipe, the annular baffle and the second exhaust pipe are formed by stretching a metal plate.

[0006] Furthermore, the annular baffle is provided with a guide hole, and the guide hole is a through hole with a smooth inner wall; or, the guide hole is a threaded hole.

[0007] Furthermore, the valve body also includes a mounting panel arranged on the second exhaust pipe.

[0008] Furthermore, the mounting panel is arranged at the end of the second exhaust pipe, and the two are integrally formed.

[0009] Furthermore, a second valve seat for connecting the connecting mechanism and a first valve seat for connecting the toggle mechanism are provided on the inner wall of the second exhaust pipe; the first valve seat is connected to the second exhaust pipe by a first fixing screw, and the second valve seat is connected to the second exhaust pipe by a second fixing screw.

[0010] A valve comprises a valve body with an exhaust port, a valve plate and a connecting mechanism, wherein the connecting mechanism connects the valve plate and the valve body and can drive the valve plate to close the exhaust port, and the valve body is the valve body described in any one of the above technical solutions.

[0011] Furthermore, the connecting mechanism includes a connecting rod, the lower end of the connecting rod is rotatably connected to the valve body, and the upper end of the connecting rod is movably connected to the valve plate.

[0012] Further, the valve further includes a bolt and a nut. The bolt sequentially passes through the connecting rod and the valve plate and is fixedly connected to the nut. When the bolt sequentially passes through the connecting rod and the valve plate and is fixedly connected to the nut, the clearance between the head of the bolt and the nut > the sum of the thickness of the valve plate and the thickness of the connecting rod.

[0013] Further, the bolt is a stepped bolt, which sequentially includes a bolt head, a stepped section and a screw section along its axial direction. The valve plate is sleeved on the stepped section.

[0014] Advantages of the present invention:

[0015] 1. In the present invention, the valve body includes a first exhaust pipe, a second exhaust pipe and an annular baffle. The inner diameter of the first exhaust pipe < the width of the valve plate < the inner diameter of the second exhaust pipe. When the inner diameter of the first exhaust pipe < the width of the valve plate < the inner diameter of the second exhaust pipe, the valve plate is arranged in the second exhaust pipe. After the valve plate opens the exhaust port, the clearance between the valve plate and the inner wall of the second exhaust pipe will become larger. With such a design, it is avoided that the oil fume discharged by the range hood is difficult to enter the valve body due to the narrowing of the exhaust duct.

[0016] 2. In the present invention, when the inner diameter of the first exhaust pipe < the width of the valve plate < the inner diameter of the second exhaust pipe, the valve body can cooperate with two different specifications of exhaust pipes (the exhaust pipes are used to connect the valve and the range hood). Description of the drawings

[0017] Figure 1 is a perspective view of the valve in the preferred embodiment of the present invention;

[0018] Figure 2 is a bottom view of the valve in the preferred embodiment of the present invention;

[0019] Figure 3 is Figure 2 a cross-sectional view taken along line A-A in;

[0020] Figure 4 is Figure 2 a cross-sectional view taken along line B-B in (the locking mechanism is in the locked position);

[0021] Figure 5 is Figure 2 a cross-sectional view taken along line B-B in (the locking mechanism is in the unlocked position);

[0022] Figure 6 is a perspective view of the locking mechanism and the temperature sensing mechanism in the preferred embodiment of the present invention;

[0023] Figure 7 is a cross-sectional view of the locking mechanism and the temperature sensing mechanism in the preferred embodiment of the present invention;

[0024] Figure 8 is a three-dimensional diagram of a valve body in a preferred embodiment of the present invention;

[0025] Figure 9 is a front view of the toggle mechanism in a preferred embodiment of the present invention;

[0026] Figure 10 is a three-dimensional diagram of a second valve seat in a preferred embodiment of the present invention;

[0027] 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);

[0028] 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);

[0029] Figure 13 It is a three-dimensional diagram of the connecting mechanism in the preferred embodiment of the present invention. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figure 3 and Figure 8 The valve body 1 includes a first exhaust pipe 101, a second exhaust pipe 103 and an annular baffle 102 that can be against the valve plate 2. The first exhaust pipe 101, the second exhaust pipe 103 and the annular baffle 102 are made of metal. The first exhaust pipe 101 is connected to the second exhaust pipe 102 through the annular baffle 102. The annular baffle 102 surrounds an exhaust port 111. The inner diameter of the first exhaust pipe 101 is less than the width of the valve plate 2 and less than the inner diameter of the second exhaust pipe 103.

[0032] It should be noted that in this embodiment, the first exhaust pipe 101, the second exhaust pipe 103, the annular baffle 102 and the valve plate 2 are annular. Therefore, the inner diameter of the first exhaust pipe 101 is the diameter of the first exhaust pipe 101, the inner diameter of the second exhaust pipe 103 is the diameter of the second exhaust pipe 103, the exhaust port 111 on the annular baffle 102 is circular, and the width of the valve plate 2 is the diameter of the valve plate 2. In other embodiments of the present invention, the first exhaust pipe, the second exhaust pipe, the annular baffle and the valve plate may be elliptical. When the first exhaust pipe, the second exhaust pipe, the annular baffle and the valve plate may be elliptical, the inner diameter of the first exhaust pipe is the diameter at the long axis of the first exhaust pipe, the inner diameter of the second exhaust pipe is the diameter at the long axis of the second exhaust pipe, the exhaust port on the annular baffle is elliptical, and the width of the valve plate is the diameter at the long axis of the valve plate; or, the first exhaust pipe, the second exhaust pipe and the annular baffle may be polygonal, and the valve plate is circular. When the first exhaust pipe, the second exhaust pipe and the annular baffle may be polygonal and the valve plate is circular, the width of the first exhaust pipe is the distance between the two farthest points on the polygon, the width of the second exhaust pipe is the distance between the two farthest points on the polygon, the exhaust port on the annular baffle is polygonal, and the width of the valve plate is the diameter of the valve plate.

[0033] In this embodiment, the first exhaust pipe 101, the annular baffle 102 and the second exhaust pipe 103 are formed by stretching a metal plate. Such a design reduces the manufacturing cost of the valve body 1 and improves the production efficiency of the valve body 1. In other embodiments of the present invention, the first exhaust pipe, the annular baffle and the second exhaust pipe can be connected into one body by welding, and the first exhaust pipe, the annular baffle and the second exhaust pipe can also be connected into one body by fasteners.

[0034] See Figure 8 , the annular baffle 102 is provided with a guide hole 12, and the guide hole 12 is a through hole with a smooth inner wall; or, the guide hole 12 is a threaded hole. When the guide hole 12 is a through hole with a smooth inner wall, the locking rod can move axially along the guide hole 12; when the guide hole 12 is a threaded hole, the locking rod can be fixed on the valve body 1. Therefore, the internal structure of the guide hole is adaptively changed according to actual needs.

[0035] See Figure 8 , the valve body 1 further includes a mounting panel 104 provided on the second exhaust pipe 103. The mounting panel 104 is provided at the end of the second exhaust pipe 103 and is integrally formed therewith. The mounting panel 104 is used to prevent the valve from leaking smoke.

[0036] Preferably, the mounting panel 104 includes a first extension section 1041 extending outward from the second exhaust pipe 103 and a second extension section 1042 extending from the first extension section in the smoke exhaust direction, and a flexible gasket (the valve contacts the wall through the flexible gasket to increase the smoke isolation performance of the valve) is arranged in the space enclosed by the first extension section 1041 and the second extension section 1042.

[0037] See also Figure 8 The valve body 1 further includes an annular plate 105 disposed on the first exhaust pipe 101, and the annular plate 105 is used to realize the stretching forming of the first exhaust pipe 101. Of course, after the first exhaust pipe 101 is formed, the annular plate 105 can be cut off by a tool.

[0038] See also Figure 3 The second exhaust pipe 103 has a second valve seat 107 for connecting the connecting mechanism 3 and / or the second exhaust pipe 103 has a first valve seat 106 for connecting the toggle mechanism 6. This design makes it easy to replace the connecting mechanism 3 and the toggle mechanism 6.

[0039] See also Figure 3 and Figure 10 The first valve seat 106 is connected to the second exhaust pipe 103 by a first fixing screw 20, and the second valve seat 107 is connected to the second exhaust pipe 103 by a second fixing screw 30. In other embodiments of the present invention, the first valve seat is snap-connected to the valve body, and the second valve seat is connected to the valve body by welding.

[0040] from Figure 8 As can be seen in the figure, the second exhaust pipe 103 is provided with a first positioning hole 1031 that cooperates with the first fixing screw 20 and a second positioning hole 1032 that cooperates with the second fixing screw 30. With such a design, when the smoke exhaust pipe is sleeved on the second exhaust pipe 103, the smoke exhaust pipe can be clamped between the first fixing screw 20 and the second fixing screw 30.

[0041] See also Figure 2 and Figure 3 The valve includes a valve body 1 with 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.

[0042] from Figure 3It can be seen that the valve body 1 of this embodiment has an exhaust channel 11, and an exhaust port 111 is arranged on the exhaust channel 11. When the valve plate 2 closes the exhaust port 111, the exhaust channel 11 located on both sides of the exhaust port 111 will not be able to realize the flow of smoke, which means that when the valve plate 2 closes the exhaust port 111, the smoke in the user's room cannot pass through the valve to enter the exhaust channel, and the smoke in the exhaust channel cannot pass through the valve to enter the user's room. Of course, in the prior art, the valve body may include an annular baffle with an exhaust port, and there is no exhaust channel on this valve body.

[0043] There are three ways for the connecting mechanism 3 on the valve to close the exhaust port 111 through the valve plate 2: 1. Figure 3 As shown, the valve includes a second elastic element 8, which 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.

[0044] See also Figure 1 , Figure 6 and Figure 11 In this embodiment, the valve further comprises a locking mechanism 4, a toggle mechanism 6, a first elastic element 7 and a temperature sensing mechanism 5. For the convenience of distinction, the present invention refers to the elastic element as the first elastic element 7. The locking mechanism 4 and the toggle mechanism 6 are movably arranged on the valve body 1. The locking mechanism 4 has a locking position and an unlocking position. Figure 4 As shown, when the locking mechanism 4 is in the locked position, the temperature sensing mechanism 5 is clamped between the locking mechanism 4 and the valve body 1. After the temperature sensing mechanism 5 is actuated, the first elastic element 7 drives the locking mechanism 4 to move from the locked position to the unlocked position through the toggle mechanism 6. Figure 5 As shown, when the locking mechanism 4 is located at the unlocking position, the valve plate 2 closes the exhaust port 111 .

[0045] The existing valve (the specific structure can refer to the invention patent with 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 limit piece 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 limit piece to achieve the temperature sensing mechanism being clamped between the lever and the limit piece.

[0046] When the temperature sensing mechanism is clamped between the lever and the limiter, the lever applies a first force to the first metal plate, and the limiter applies a second force to the second metal plate. The first force and the second force are of the same magnitude and opposite direction. In other words, the first force maintains the tendency of the first metal plate to move upward relative to the fusible solder, and the second force maintains the tendency of the second metal plate to move downward relative to the fusible solder. Since the position where the lever abuts against the first metal plate and the position where the limiter abuts against the second metal plate are staggered, the fusible solder is subjected to a torsional force for a long time. The torsional force acting on the fusible solder for a long time will cause the first metal plate (or the second metal plate) to separate from the fusible solder, which means that under normal temperature conditions, the temperature sensing mechanism will automatically fail after the valve is 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, so that the lever drives the valve plate to close the exhaust port through the connecting rod.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] See also Figure 8 The 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.

[0052] 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.

[0053] 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.

[0054] 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 7It 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] See also Figure 3 and Figure 13 The connecting mechanism 3 includes 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. 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 enable the valve plate to close the exhaust port, while the upper end of the connecting rod is rotatably connected to the valve plate.

[0063] In this embodiment, the valve also includes a bolt 91 and a nut 92. The 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 bolt 91 passes through the connecting rod 31 and the valve plate 2 in sequence and is fixedly connected to the nut 92, the gap between the bolt head and the nut 92 is greater than the sum of the thickness of the valve plate 2 and the thickness of the bottom plate 301 on the connecting rod 31.

[0064] Preferably, the bolt 91 is a stepped bolt, which includes a bolt head, a stepped portion and a screw section in sequence along its axial direction, and the valve plate 2 is sleeved on the stepped portion.

[0065] In this embodiment, the connection mechanism 3 further comprises a rotating shaft 10, and the connecting rod 31 is rotatably connected to the second valve seat 107 via the rotating shaft 10. In other embodiments of the present invention, one of the connecting rod and the second valve seat is provided with a rotating shaft, and the other is provided with an axial hole matched with the rotating shaft.

[0066] See also Figure 9 and Figure 11The 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.

[0067] 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.

[0068] Preferably, the depth of the positioning groove 611 is H2, where H2>the thickness of the second metal plate 523.

[0069] 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.

[0070] In this embodiment, the adapter includes a rotating shaft section 62 and a clamping section 63, and the first elastic element 7 is a first torsion spring, which is sleeved on the clamping section 63. Of course, in other embodiments of the present invention, the adapter may include only a rotating shaft section, and the first torsion spring is sleeved on the rotating shaft section; or, the adapter may include only a shaft hole section, and the first torsion spring is sleeved on the valve body.

[0071] See also Figure 12 and Figure 13 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 slides 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.

[0072] 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.

[0073] Preferably, the protrusion is a reverse tooth. 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.

[0074] As described above, the above is only the specific implementation manner 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 content described in the drawings and the above specific implementation manner. 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, and a connecting mechanism, the connecting mechanism connecting the valve plate to the valve body and being capable of driving the valve plate to close the exhaust port, characterized in that, The valve body comprises a first exhaust pipe, a second exhaust pipe and an annular baffle plate capable of abutting against the valve plate, wherein the first exhaust pipe, the second exhaust pipe and the annular baffle plate are made of metal, the first exhaust pipe and the second exhaust pipe are connected through the annular baffle plate, the annular baffle plate forms an exhaust port, and the inner diameter of the first exhaust pipe is smaller than the width of the valve plate and smaller than the inner diameter of the second exhaust pipe; The valve further comprises 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. When the temperature sensing mechanism is clamped between the locking mechanism and the valve body, part of the temperature sensing mechanism is located on the outside of the valve body, and the remaining part of the temperature sensing mechanism is located on the inside of the valve body; The temperature sensing unit and the solder ring constitute a temperature sensing mechanism. The first metal plate, the second metal plate and the solder piece constitute the temperature sensing unit. The solder piece is used to connect the first metal plate and the second metal plate. The second metal plate is provided with a rotation stop. The height of the rotation stop is H1, and the axial length of the solder ring is H3, H1<H3.

2. The valve according to claim 1, characterized in that, The first exhaust pipe, the annular baffle and the second exhaust pipe are formed by stretching a metal plate.

3. The valve according to claim 1, characterized in that, The annular baffle is provided with a guide hole, and the guide hole is a through hole with a smooth inner wall; or, the guide hole is a threaded hole.

4. The valve according to claim 1, characterized in that, The valve body further includes a mounting panel disposed on the second exhaust pipe.

5. The valve according to claim 4, characterized in that, The mounting panel is arranged at the end of the second exhaust pipe, and the two are integrally formed.

6. The valve according to claim 1, characterized in that, A second valve seat for connecting the connecting mechanism and a first valve seat for connecting the toggle mechanism are provided on the inner wall of the second exhaust pipe; the first valve seat is connected to the second exhaust pipe via a first fixing screw, and the second valve seat is connected to the second exhaust pipe via a second fixing screw.

7. The valve according to claim 1, characterized in that, The connecting mechanism comprises a connecting rod, the lower end of the connecting rod is rotatably connected to the valve body, and the upper end of the connecting rod is movably connected to the valve plate.

8. The valve according to claim 7, characterized in that, The valve also includes a bolt and a nut, wherein the bolt passes through the connecting rod and the valve plate in sequence and is fixedly connected to the nut. When the bolt passes through the connecting rod and the valve plate in sequence and is fixedly connected to the nut, the interval gap between the bolt head and the nut is greater than the sum of the thickness of the valve plate and the thickness of the connecting rod.

9. The valve according to claim 8, characterized in that, The bolt is a stepped bolt, which comprises a bolt head, a stepped portion and a screw rod portion in sequence along its axial direction, and the valve plate is sleeved on the stepped portion.

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