CN110836279A - Fastening mechanism and valve - Google Patents

Abstract

The invention relates to a fastening mechanism and a valve, which solve the problem that a connecting structure between a connecting rod and a valve plate is complex. The fastening mechanism is used for connecting the connecting mechanism and the valve plate and comprises a step bolt and a nut, the step bolt sequentially comprises a bolt head, a step section and a screw section along the axial direction of the step bolt, the nut is fixedly connected with the screw section, and the nut can be abutted to the stage.

Description

Fastening mechanism and valve

Technical Field

The invention relates to a fastening mechanism and a valve.

Background

The existing valve comprises a valve body with an exhaust port, a valve block, a connecting rod and a torsion spring, wherein the valve body is provided with an exhaust passage, the exhaust passage is provided with the exhaust port, the connecting rod is used for connecting the valve block and the valve body, and the torsion spring is used for driving the connecting rod to rotate relative to the valve body so as to keep the tendency that the connecting rod closes the exhaust port through the valve block.

The valve (application number is 201510653649.8) still includes the fixed plate, and the connecting rod rotates with the fixed plate to be connected, fixed plate and valve block fixed connection. However, the conventional connecting structure between the connecting rod and the valve plate is complicated.

Disclosure of Invention

The invention aims to provide a fastening mechanism and a valve, so as to simplify a connecting structure between a connecting mechanism and a valve plate.

In order to solve the above problems, the present invention provides the following technical solutions: the fastening mechanism is used for connecting the connecting mechanism and the valve plate and comprises a step bolt and a nut, the step bolt sequentially comprises a bolt head, a step section and a screw section along the axial direction of the step bolt, the nut is fixedly connected with the screw section, and the nut can be abutted to the stage.

Further, the axial length of the stage is more than or equal to 3 mm.

Further, the locking mechanism further comprises an elastic washer including one or more of a helical elastic washer, a wave elastic washer, and a saddle elastic washer.

The valve comprises a valve body with an exhaust port, a valve block, a connecting mechanism and a fastening mechanism, wherein the lower end of the connecting mechanism is movably arranged on the valve body, the upper end of the connecting mechanism is movably connected with the valve block through the fastening mechanism, the connecting mechanism can drive the valve block to be closed, the exhaust port is formed in the fastening mechanism, the fastening mechanism is any one of the technical schemes, and the valve block is sleeved on the stage.

Furthermore, the valve also comprises an adjusting rod, and the adjusting rod penetrates through the connecting mechanism and then abuts against the valve block so as to adjust the angle of the valve block relative to the axial movement of the step bolt.

Furthermore, the connecting mechanism comprises a connecting rod, an accommodating cavity is formed in the connecting rod, and at least part of the bolt head is located in the accommodating cavity.

Further, the valve body comprises a body with an exhaust port and a valve seat, the upper end of the connecting rod is movably connected with 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 body.

Furthermore, the valve also comprises a rotating shaft and a torsion spring, the lower end of the connecting rod is rotatably connected with the valve seat through the rotating shaft, the torsion spring is sleeved on the rotating shaft, one torsion arm of the torsion spring is abutted against the wall of the accommodating cavity, and the other torsion arm of the torsion spring is abutted against the valve seat and/or the body; and the spring coil of the torsion spring is positioned in the accommodating cavity.

Further, the valve further comprises a locking mechanism, a shifting mechanism, an elastic element and a temperature sensing mechanism, wherein the locking mechanism and the shifting mechanism are movably arranged on the valve body, the locking mechanism is provided with 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 acts, the elastic element drives the locking mechanism to move from the locking position to the unlocking position through the shifting mechanism, and when the locking mechanism is located at the unlocking position, the valve sheet is closed to the exhaust port.

Furthermore, the connecting rod comprises a first side plate, a second side plate and a bottom plate used for connecting the first side plate and the second side plate, the first side plate, the bottom plate and the second side plate are enclosed into the accommodating cavity, a first inclined section is arranged on the first side plate, a second inclined section is arranged on the second side plate, and after the temperature sensing mechanism acts, the toggle mechanism can slide along the first inclined section and/or the second inclined section so that the connecting rod can close the exhaust port through the valve plate.

The invention has the beneficial effects that:

1. according to the invention, the fastening mechanism comprises the step bolt, the step bolt sequentially comprises a bolt head, a platform stage and a screw section along the axial direction of the step bolt, and when the nut is fixedly connected with the screw section and is abutted against the platform stage, the valve plate is sleeved on the platform stage. So design, the relative step section activity of valve block to realize the relative coupling mechanism's of adjusting valve block angle.

2. In the invention, the fastening mechanism comprises two parts of a step bolt and a nut, and the existing connecting mechanism is connected with the valve plate through at least three parts. Therefore, the fastening mechanism of the invention simplifies the connecting structure between the connecting mechanism and the valve plate.

Drawings

FIG. 1 is a perspective view of a valve in a preferred embodiment of the invention;

FIG. 2 is a bottom view of the valve in the preferred embodiment of the present invention;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken at B-B of FIG. 2 (with the locking mechanism in the locked position);

FIG. 5 is a cross-sectional view taken at B-B of FIG. 2 (with the locking mechanism in an unlocked position);

FIG. 6 is a perspective view of the locking mechanism and temperature sensing mechanism in a preferred embodiment of the present invention;

FIG. 7 is a cross-sectional view of the locking mechanism and temperature sensing mechanism in a preferred embodiment of the present invention;

FIG. 8 is a perspective view of a valve body in a preferred embodiment of the invention;

FIG. 9 is a front view of the toggle mechanism in the preferred embodiment of the present invention;

FIG. 10 is a perspective view of a second valve seat in the preferred embodiment of the present invention;

FIG. 11 is a perspective view of a portion of the valve of the preferred embodiment of the invention (with the valve plate and attachment mechanism omitted);

FIG. 12 is a perspective view of a portion of a valve in a preferred embodiment of the invention (with the toggle mechanism omitted);

FIG. 13 is a schematic structural view of a fastening mechanism in a preferred embodiment of the present invention;

FIG. 14 is a perspective view of the attachment mechanism in the preferred embodiment of the present invention;

fig. 15 is a cross-sectional view (with an adjustment lever) at a-a in fig. 2.

Detailed Description

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

Referring to fig. 3 and 13, the fastening mechanism 9, for connecting the connecting mechanism 3 and the valve plate 2, includes a step bolt 91 and a nut 92, the step bolt 91 includes a bolt head 911, a step 912 and a screw section 913 in sequence along the axial direction thereof, the nut 92 is fixedly connected with the screw section 913, and the nut 92 can abut against the step section 912.

In this embodiment, the locking mechanism 9 further comprises an elastic washer, which is clamped between the connecting mechanism 3 and the valve plate 2, and the elastic washer comprises one or more of a spiral elastic washer, a wave elastic washer and a saddle elastic washer.

Referring to fig. 2 and 3, the valve includes a valve body 1 having an exhaust port 111, a valve sheet 2, and a connecting mechanism 3, wherein the valve body 1, the valve sheet 2, and the connecting mechanism 3 are made of metal or other high temperature resistant materials, and the connecting mechanism 3 is used for connecting the valve sheet 2 and the valve body 1 and driving the valve sheet 2 to close the exhaust port 111.

As can be seen from fig. 3, the valve body 1 of the embodiment has the exhaust channel 11, the exhaust port 111 is disposed on the exhaust channel 11, and when the valve plate 2 closes the exhaust port 111, the exhaust channel 11 is located on two sides of the exhaust port 111, so that the flow of the smoke cannot be realized, that is, when the valve plate 2 closes the exhaust port 111, the smoke in the user room cannot enter the exhaust passage through the valve, and the smoke in the exhaust passage cannot enter the user room through the valve. Of course, in the prior art, the valve body may include an annular baffle having exhaust ports, such valve body being devoid of exhaust passages.

The valve connection mechanism 3 has three ways of closing the exhaust port 111 by the valve sheet 2: 1. as shown in fig. 3, the valve includes a second elastic element 8, the second elastic element 8 is one of a second torsion spring, a tension spring and a compression spring, and the second elastic element 8 is used for driving the connecting mechanism 3 to drive the valve plate 1 to move relative to the valve body 1, so as to maintain a tendency of the valve plate 1 to close the exhaust port 111; 2. the valve plate keeps the trend of closing the exhaust port under the action of self gravity; 3. the connecting mechanism is eccentrically arranged to maintain the tendency of the valve plate to close the exhaust port.

Referring to fig. 1, 6 and 11, in this embodiment, the valve further includes a locking mechanism 4, a toggle mechanism 6, an elastic element and a temperature sensing mechanism 5, in which the elastic element is referred to as a first elastic element 7 for easy distinction, the locking mechanism 4 and the toggle mechanism 6 are movably disposed on the valve body 1, the locking mechanism 4 has a locking position and an unlocking position, as shown in fig. 4, when the locking mechanism 4 is located at 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 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, as shown in fig. 5, when the locking mechanism 4 is located at the unlocking position, the valve sheet 2 closes the exhaust port 111.

The existing valve (the specific structure of the existing valve can refer to the invention patent with the application number of 201610651149.5) comprises a valve seat, a shifting rod, a temperature sensing mechanism and a torsion spring, wherein the temperature sensing mechanism comprises a first metal plate, a second metal plate and a fusible solder for connecting the first metal plate and the second metal plate, the shifting rod and the second metal plate are rotatably connected with the valve seat, one torsion arm of the torsion spring is connected with the valve seat, the other torsion arm of the torsion spring is connected with the shifting rod and drives the shifting rod to abut against the first metal plate, a limiting part is arranged on the valve seat, when the other torsion arm of the torsion spring is connected with the shifting rod and drives the shifting rod to abut against the first metal plate, and the first metal plate and the second metal plate are connected through the fusible solder, the second metal plate abuts against the limiting part, so that the temperature sensing mechanism is clamped between the shifting.

When the temperature sensing mechanism is clamped between the shifting lever and the limiting part, the shifting lever applies a first acting force to the first metal plate, the limiting part applies a second acting force to the second metal plate, the first acting force and the second acting force are the same in size and opposite in direction, in other words, the first acting force keeps the upward movement trend of the first metal plate relative to the fusible solder, the second acting force keeps the downward movement trend of the second metal plate relative to the fusible solder, and the position where the shifting lever abuts against the first metal plate and the position where the limiting part abuts against the second metal plate are staggered with each other, so that the position where the fusible solder is abutted against by the torsional force for a long time. The first metal plate (or the second metal plate) can be separated from the fusible solder due to the long-term action of the torsional force on the fusible solder, which means that the temperature sensing mechanism can automatically fail after the valve is used for a period of time in a normal temperature environment. After the temperature sensing mechanism automatically fails, the torsion spring drives the deflector rod to rotate relative to the valve seat so as to realize that the deflector rod drives the valve plate to close the exhaust port through the connecting rod.

In the invention, the valve comprises a locking mechanism 4 and a temperature sensing mechanism 5, wherein 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 is required to be mounted on the valve seat through three steps in the manufacturing process of the valve: firstly, a temperature sensing mechanism is arranged on a valve seat through a fastener; secondly, one side of the temperature sensing mechanism is abutted against the limiting piece; and thirdly, the other side of the temperature sensing mechanism is abutted against the deflector rod. In the invention, the temperature sensing mechanism 5 is firstly arranged on the locking mechanism 4, then the temperature sensing mechanism 5 is clamped between the locking mechanism 4 and the valve body 1, and the temperature sensing mechanism 5 completes the installation steps through the two steps. By the design, the mounting position and the mounting structure of the temperature sensing mechanism 5 are changed, so that the mounting steps of the valve are simplified, the production efficiency of the valve is improved, and the manufacturing cost of the valve is reduced.

In the invention, the locking mechanism 4 is provided with a locking position and an unlocking position, 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 toggle mechanism 6, and after the temperature sensing mechanism 5 with different specifications is replaced on the valve, the locking position of the locking mechanism 4 is changed. By adopting the design, the position precision requirement of the locking mechanism 4 can be properly reduced, so that the manufacturing cost of the valve can be reduced.

In the 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 positioned at the outer side of the valve body 1, and the structure can prevent smoke from entering the exhaust passage when the valve catches fire 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 positioned on the inner side of the valve body 1, and the structure can prevent smoke from entering a room through the exhaust passage when the valve catches fire 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 positioned at the outer side of the valve body 15, and the rest of the temperature sensing mechanism is positioned at the inner side of the valve body 1, so that the structure can realize indoor and outdoor double smoke insulation of the valve.

In this embodiment, after the temperature sensing mechanism 5 is actuated, the toggle mechanism 6 drives the valve plate 2 to close the air outlet 111 through the connecting mechanism 3. So design, toggle mechanism 6 does not with valve block 2 direct contact to avoid valve block 2 to take place to warp under toggle mechanism 6's striking. Of course, in other embodiments of the present invention, after the temperature sensing mechanism is activated, the toggle mechanism may also directly drive the valve plate to close the exhaust port.

Referring to fig. 8, the valve body 1 is provided with a guide passage for guiding the movement direction of the locking mechanism 4, at least a part of the locking mechanism 4 is arranged in the guide passage, and when the locking mechanism 4 is located at the locking position or the unlocking position, at least one end surface of the locking mechanism 4 is located outside the guide passage. Due to the design, the locking mechanism 4 can be conveniently taken out of the guide channel, a part of the temperature sensing mechanism 5 can be conveniently arranged on the outer side of the valve body 1, and the rest part of the temperature sensing mechanism 5 is conveniently arranged on the inner side of the valve body 1. In other embodiments of the present invention, the locking mechanism may be welded to the inside of the valve body, and a space for holding the temperature sensing mechanism is left between the locking mechanism and the side wall of the valve body.

Preferably, the valve body 1 includes a first exhaust pipe 101, a second exhaust pipe 103 and an annular baffle 102 that can offset against the valve plate 2, the first exhaust pipe 101 is connected with the second exhaust pipe 103 through the annular baffle 102, the annular baffle 102 encloses to form an exhaust port 111, the annular baffle 102 is provided with a guide hole 12, the guide hole 12 is a guide channel, the locking mechanism 4 includes a locking rod, and the locking rod penetrates through the guide hole 12. So design, temperature sensing mechanism 5 can set up in the valve body 1 outside, also can set up in the valve body 1 inboard, and this just means, and the valve just can realize indoor, outdoor dual smoke insulation through setting up one set of toggle mechanism 6. In addition, in other embodiments of the present invention, the guide channel may also be disposed at other positions of the valve body by changing the shape, for example, a guide seat is disposed on the inner side of the valve body, a guide groove is disposed on the guide seat, the top of the guide groove is open, two opposite openings are disposed on the side wall of the guide groove, and the guide groove is a guide channel.

In this embodiment, when the temperature sensing means 5 is sandwiched between the locking means 4 and the valve body 1, a part of the temperature sensing means 5 is located outside the valve body 1, and the remaining part of the temperature sensing means 1 is located inside the valve body 1. So design realizes that the valve carries out indoor, outdoor dual smoke insulation. Of course, in other embodiments of the invention, when the temperature sensing means is clamped between the locking means and the valve body, the temperature sensing means may be located only outside the valve body; alternatively, when the temperature sensing means is sandwiched between the locking means and the valve body, the temperature sensing means is located only inside the valve body.

Referring to fig. 6, a fixing portion is provided at one end of the locking lever, the temperature sensing mechanism 5 is clamped between the fixing portion and the ring-shaped baffle plate 102, as can be seen from fig. 7, the locking lever includes a screw, the axial length of the screw rod portion 42 is greater than the sum of the lengths of the solder ring 51 and the guide hole 12, the fixing portion is the head portion 41 of the screw, the temperature sensing mechanism 5 includes at least one solder ring 51 sleeved on the locking lever, the solder ring 51 has a mounting hole 511, and when the rod portion 42 of the screw penetrates through the mounting hole 511, the solder ring 51 is clamped between the head portion 41 of the screw and the ring-shaped baffle plate 102. In other embodiments of the invention, the locking mechanism comprises a bolt and a nut, and the bolt is fixedly connected with the nut after penetrating through the brazing ring and the first metal plate.

Further, in other embodiments of the invention, the temperature sensing mechanism may comprise at least one brazing sheet sandwiched between the head of the screw and the annular fence.

In this embodiment, a solder ring is clamped between the head 41 of the screw and the ring baffle 102, but in other embodiments of the invention, the number of solder rings clamped between the fixing portion and the ring baffle may be adjusted according to actual requirements.

Referring to fig. 6, the temperature sensing mechanism 5 further includes a first metal plate 521, a second metal plate 523 and a brazing filler metal member 522 for connecting the first metal plate 521 and the second metal plate 523, the first metal plate 521 is detachably disposed at the other end of the locking rod, the second metal plate 523 is provided with a rotation stop portion 5231, and when the locking mechanism 4 is located at the locking position, the rotation stop portion 5231 is clamped 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 solder rod, one end of the solder rod is clamped between the locking rod and the valve body, and the other end of the solder rod is provided with a rotation stopping portion, when the locking mechanism is located at the locking position, the rotation stopping portion is clamped 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 material 522 form a temperature sensing unit 52, the temperature sensing unit 52 and the brazing material ring 51 form a temperature sensing mechanism 5, when a fire breaks out indoors, the brazing material ring 51 is melted, and the locking rod moves axially from a locking position to an unlocking position, so that the valve plate 2 closes the exhaust port 111. When a fire breaks out outdoors, the brazing member 522 is melted and the first metal plate 521 is separated from the second metal plate 523 to allow the valve sheet 2 to close the discharge port 111.

In this embodiment, the height of the rotation stopper 5231 is H1, the axial length of the solder ring 51 is H3, and H1 < H3. So designed, after the solder ring 51 is melted, the range of the axial movement of the locking mechanism 4 relative to the valve body 1 is > H1, which means that the rotation stop 5231 will be disengaged from the toggle mechanism 6 when the locking mechanism 4 is moved from the locked position to the unlocked position.

In this embodiment, the solder ring 51 and the solder member 522 may be one or more of a solder material such as sapphire, indium, tin, cadmium, zinc, and lead.

It is clear from the above description that: the operation of the temperature sensing mechanism 5 includes a melting operation of the temperature sensing mechanism 5. In other embodiments of the present invention, the temperature sensing mechanism may include a memory metal, the memory metal is clamped between the locking mechanism and the valve body, after the memory metal deforms (the deformation includes but is not limited to the memory metal bending under the action of pressure, and the thickness of the memory metal changing under the action of pressure), the first elastic element drives the locking mechanism to move from the locking position to the unlocking position through the toggle mechanism, and when the locking mechanism is located at the unlocking position, the valve plate closes the exhaust port.

In this embodiment, the first metal plate 521 can be detachably disposed at the other end of the locking rod through clamping, screwing, hinging, and the like, preferably, the first metal plate 521 is provided with a fixing section 5211, and the fixing section 5211 is provided with a threaded hole matching with the rod portion 42 of the screw, so that the rod portion 42 of the screw penetrates through the threaded hole to fixedly connect the rod portion 42 of the screw with the first metal plate 521.

Referring to fig. 3 and 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 with 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 with the valve body 1, and the upper end of the connecting rod 31 is movably connected with the valve plate 2 through a fastening mechanism 9. In addition, in other embodiments of the invention, the lower end of the connecting rod can slide along the slide rail on the valve body to realize that the valve plate closes the exhaust port, and the upper end of the connecting rod is rotatably connected with the valve plate.

The step bolt 91 sequentially penetrates through the connecting rod 31 and the valve sheet 2 and then is fixedly connected with the nut 92, when the nut 92 is fixedly connected with the screw section 913 and the nut 92 abuts against the step section 912, the valve sheet 2 sleeved on the stage section 912 can move relative to the connecting rod 31.

Preferably, the axial length of stage 912 is ≧ 3 mm. By the design, the axial length of the stage 912 is larger 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.

Referring to fig. 15, the valve further includes an adjusting rod 100, and the adjusting rod 100 is inserted through the connecting mechanism 3 and then abuts against the valve plate 2 to adjust the axial movement angle of the valve plate 2 relative to the step bolt 91. By such design, the valve plate 2 can be prevented from being unable to close the exhaust port 111 due to the overlong axial length of the stage 912.

Preferably, the adjustment rod 100 is an adjustment screw that can pass through the connecting rod 31, and the adjustment screw is located above the step bolt 91 (including but not limited to directly above and laterally above). In other embodiments of the invention, the adjustment rod may also be an adjustment bolt when the connection mechanism comprises an adjustment nut provided on the connecting rod.

Referring to fig. 14, the connecting rod 31 is provided with a receiving cavity 311, and at least a part of the bolt head 911 is located in the receiving cavity 311. By the design, the problem that the step bolt 91 cannot work normally due to the fact that the bolt head 911 collides with an external object is avoided.

In this embodiment, the valve body 1 includes a body having the exhaust port 111 and a valve seat 107, the upper end of the connecting rod 31 is movably connected with the valve plate 2 through the fastening mechanism 9, the lower end of the connecting rod 31 is movably disposed on the valve seat 107, and the valve seat 107 is detachably disposed on the body.

Preferably, the valve seat 107 is fixedly connected to the body by means of a fastening screw 30. In other embodiments of the invention, the valve seat 107 is snap-fit to the body.

Preferably, the connecting rod 31 is rotatably connected to the valve seat 107 by the rotating shaft 10. In other embodiments of the present invention, one of the link and the valve seat is provided with a shaft, and the other is provided with a shaft hole into which the shaft is inserted.

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

Referring to fig. 12 and 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 enclose an accommodating cavity 311, a first inclined section 3021 is disposed on the first side plate 302, and a second inclined section 3031 is disposed on the second side plate 303, after the temperature sensing mechanism 5 operates, 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 sheet 2. So designed, the direction of movement of the toggle mechanism 6 is defined.

In this embodiment, the first inclined section 3021 and/or the second inclined section 3031 are provided with at least one protrusion for preventing the shift lever from sliding along the reverse direction. By the design, the valve plate 2 is effectively prevented from opening the exhaust port 111 under the action of high-temperature airflow.

Preferably, the protrusion is a pawl, and thus the shift lever cannot slide reversely. In other embodiments of the invention, the projection may be a boss.

Referring to fig. 9 and 11, the toggle mechanism 6 includes a toggle lever transversely disposed on the valve body 1, an adapter portion is disposed at an edge position of the toggle lever, and a middle position of the toggle lever protrudes outward. In other embodiments of the invention, the toggle mechanism arc, the rotating rod, and the fastener for connecting the arc and the rotating rod.

Referring to fig. 9, the shift lever is provided with an accommodating cavity for limiting the installation position of the temperature sensing element 5, specifically: the outer side wall of the shift lever is provided with a positioning groove 611, the positioning groove 611 is the accommodating cavity, and when the rotation stop portion 5231 is engaged with the shift lever, the second metal plate 523 is located in the positioning groove 611. By the design, the position of the second metal plate 523 clamped on the toggle mechanism 6 is effectively limited. In other embodiments of the present invention, the driving lever is provided with a positioning hole, the positioning hole is the accommodating cavity, and the second metal plate can be inserted into the positioning hole.

Preferably, the depth of the positioning groove 611 is H2, and H2 > the thickness of the second metal plate 523.

As can be seen from fig. 9, the middle position of the shift lever is provided with an arc-shaped section 61 for connecting the adapter, and the outer side wall of the arc-shaped section is arc-shaped. Due to the design, the interference between the deflector rod and the valve body 1 in the movement process is avoided.

In this embodiment, the adapter portion includes a rotating 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 invention, the transition portion may comprise only the shaft section, or alternatively, the transition portion may comprise only the shaft bore section.

Referring to fig. 3 and 10, in the present embodiment, the shifter lever is disposed on the body through a shifter lever seat 106.

While the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims (10)

1. The fastening mechanism is used for connecting the connecting mechanism and the valve plate and is characterized by comprising a step bolt and a nut, wherein the step bolt sequentially comprises a bolt head, a step section and a screw section along the axial direction of the step bolt, the nut is fixedly connected with the screw section, and the nut can abut against the stage.

2. The fastening mechanism of claim 1, wherein the axial length of the land section is greater than or equal to 3 mm.

3. The fastening mechanism of claim 1, wherein the locking mechanism further comprises an elastic washer comprising one or more of a helical elastic washer, a wave elastic washer, and a saddle elastic washer.

4. The valve comprises a valve body with an exhaust port, a valve plate, a connecting mechanism and a fastening mechanism, wherein the lower end of the connecting mechanism is movably arranged on the valve body, the upper end of the connecting mechanism is movably connected with the valve plate through the fastening mechanism, and the connecting mechanism can drive the valve plate to close the exhaust port.

5. The valve of claim 4, further comprising an adjustment rod that extends through the connection mechanism and abuts the valve plate to adjust the angle of axial movement of the valve plate relative to the stepped bolt.

6. The valve of claim 4, wherein the connection mechanism includes a connecting rod having a receiving cavity in which at least a portion of the bolt head is located.

7. The valve of claim 6, wherein the valve body comprises a body having the exhaust port and a valve seat, the upper end of the link is movably connected to the valve plate via the fastening mechanism, the lower end of the link is movably disposed on the valve seat, and the valve seat is detachably disposed on the body.

8. The valve according to claim 7, wherein the valve further comprises a rotating shaft and a torsion spring, the lower end of the connecting rod is rotatably connected with the valve seat through 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 cavity, and the other torsion arm of the torsion spring abuts against the valve seat and/or the body; and the spring coil of the torsion spring is positioned in the accommodating cavity.

9. The valve of claim 6, further comprising a locking mechanism, a toggle mechanism, an elastic element, and a temperature sensing mechanism, wherein the locking mechanism and the toggle mechanism are movably disposed on the valve body, the locking mechanism has a locking position and an unlocking position, the temperature sensing mechanism is clamped between the locking mechanism and the valve body when the locking mechanism is in the locking position, the elastic element drives the locking mechanism to move from the locking position to the unlocking position through the toggle mechanism after the temperature sensing mechanism is activated, and the valve plate closes the exhaust port when the locking mechanism is in the unlocking position.

10. The valve of claim 9, wherein 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 enclose 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, and after the temperature sensing mechanism operates, 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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