Locking structure

Abstract

The present invention relates to a locking structure, which solves the problem that the fire check valve will automatically fail in a low-temperature environment. The locking structure includes a base, a connecting rod, an elastic element and a dial. The connecting rod and the dial are rotatably arranged on the base. One end of the elastic element is arranged on the base, and the other end of the elastic element is arranged on the dial and used to drive the dial to rotate relative to the base. It further includes a fusing mechanism and a stop plate. The stop plate is clamped between the fusing mechanism and the base. The stop plate is provided with a rotation-stopping portion. When the stop plate is clamped between the fusing mechanism and the base, the rotation-stopping portion is arranged on the dial to prevent the dial from rotating relative to the base. After the fusing mechanism operates, the stop plate moves relative to the base and separates the rotation-stopping portion from the dial.

Description

Technical Field

[0001] The present invention relates to a locking structure. Background Art

[0002] The locking structure (for the specific structure, reference can be made to the utility model patent with the publication number CN206830892) includes a valve seat, a dial, a temperature sensing element, and an elastic element. The dial is rotatably connected to the valve seat. One end of the elastic element is arranged on the valve seat, and the other end of the elastic element is connected to the dial and drives the dial to abut against the temperature sensing element.

[0003] Since the temperature sensing element includes a first copper sheet and a second copper sheet, the first copper sheet and the second copper sheet are integrally connected by a fusible solder. The first copper sheet is fixedly connected to the valve seat, and the second copper sheet abuts against the dial. Therefore, when the other end of the elastic element is connected to the dial and drives the dial to abut against the temperature sensing element, the second copper sheet is always subjected to an upward torsional force. This results in that after the second copper sheet works for a period of time and the connection force of the fusible solder used to connect the first copper sheet and the second copper sheet < the torsional force of the second copper sheet, the second copper sheet will be separated from the first copper sheet.

[0004] The locking structure is used for a fire check valve. The fire check valve includes a valve body, a valve flap, and a connecting rod. The valve seat is arranged on the valve body, and the connecting rod is used to connect the valve flap and the valve seat. After the second copper sheet is separated from the first copper sheet, the elastic element pushes the dial to rotate relative to the valve seat and abut against the connecting rod, and the connecting rod drives the valve flap to close the exhaust port on the valve body under the push of the dial. This causes the fire check valve to automatically fail in a low-temperature environment. Summary of the Invention

[0005] The problem to be solved by the present invention is to provide a locking structure to prevent the fire check valve from automatically failing in a low-temperature environment.

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

[0007] The locking structure includes a base, a connecting rod, an elastic element, and a dial. The connecting rod and the dial are rotatably arranged on the base. One end of the elastic element is arranged on the base, and the other end of the elastic element is arranged on the dial and is used to drive the dial to rotate relative to the base. The locking structure further includes a temperature sensing mechanism and a stop plate. The stop plate is clamped between the temperature sensing mechanism and the base. The stop plate is provided with a rotation stopping portion. When the stop plate is clamped between the temperature sensing mechanism and the base, the rotation stopping portion is arranged on the dial to prevent the dial from rotating relative to the base. After the temperature sensing mechanism acts, the stop plate moves relative to the base and separates the rotation stopping portion from the dial.

[0008] In the present invention, the locking structure includes a temperature sensing mechanism and a stop plate. The stop plate is clamped between the temperature sensing mechanism and the base. Among them, the stop plate is provided with an anti-rotation portion. When the stop plate is clamped between the temperature sensing mechanism and the base, the anti-rotation portion is arranged on the dial to prevent the dial from rotating relative to the base; the anti-rotation portion provided on the dial by the stop plate prevents the dial from rotating relative to the valve body. Compared with the prior art, the problem that the second copper sheet is separated from the first copper sheet due to the fact that the fusible solder cannot withstand the torsional force of the second copper sheet will not occur in the stop plate. This means that the stop plate can effectively ensure the "continuous" and reliable operation of the fire check valve in a low-temperature environment (the low-temperature environment refers to the ambient temperature where the fire check valve is located is lower than the melting point of the temperature sensing mechanism). Designed in this way, the fire check valve will not automatically fail in a low-temperature environment.

[0009] In the present invention, after the temperature sensing mechanism acts, the stop plate moves relative to the base and separates the anti-rotation portion from the dial. Designed in this way, the fire check valve will close the exhaust port through the valve plate in a high-temperature environment (the high-temperature environment refers to the ambient temperature where the fire check valve is located is higher than the melting point of the temperature sensing mechanism), so that the fire check valve can play a role in preventing fire and isolating smoke.

[0010] Further, the temperature sensing mechanism includes a fastener and a fusing assembly. The fastener is arranged on the base, the fusing assembly is arranged on the fastener, the stop plate is clamped between the fusing assembly and the base, and after the fusing assembly acts, the stop plate moves axially along the fastener and separates the anti-rotation portion from the dial.

[0011] In the present invention, the fastener plays two roles: 1. The fastener is arranged on the base to define the installation positions of the fusing assembly and the stop plate; 2. The fastener provides a supporting force for the fusing assembly to enable the stop plate to be clamped between the fusing assembly and the base.

[0012] Further, the fusing component includes a first metal plate, a second metal plate, and a solder for connecting the first metal plate and the second metal plate. The first metal plate and the second metal plate are respectively disposed on the fastener. The gap between the first metal plate and the second metal plate in the axial direction of the fastener is the range of the axial movement of the stop plate on the fastener. Both the first metal plate and the second metal plate are L-shaped. The first metal plate includes a first connecting portion and a first welding portion formed by bending the first connecting portion. The second metal plate includes a second connecting portion and a second welding portion formed by bending the second connecting portion. The first welding portion and the second welding portion are integrally connected by the solder. After the first welding portion and the second welding portion are integrally connected by the solder, the gap between the first connecting portion and the second connecting portion is the range of the axial movement of the stop plate on the fastener. A first avoidance hole for avoiding the fastener is provided on the first connecting portion, and a second avoidance hole for avoiding the fastener is provided on the second connecting portion. The aperture of the first avoidance hole > the aperture of the second avoidance hole, and the first connecting portion can abut against the stop plate.

[0013] Further, the fusing component includes at least one fusing piece. The fusing piece includes a first fusing portion, a second fusing portion, and a third fusing portion for controlling the range of the axial movement of the stop plate on the fastener. The first fusing portion and the second fusing portion are respectively disposed on the fastener. The third fusing portion is used for connecting the first fusing portion and the second fusing portion. In a high-temperature environment, as long as one of the first fusing portion, the second fusing portion, and the third fusing portion is fused, the fire prevention check valve can play the role of fire and smoke isolation. With such a design, the reaction time required for the fire prevention check valve to play the role of fire and smoke isolation in a high-temperature environment is shortened.

[0014] Further, the fusing component further includes at least one stop ring. The stop ring is made of fusible solder or metal. The stop ring is clamped between the first fusing portion and the second fusing portion; or, the stop ring is clamped between two adjacent fusing pieces. With such a design, the anti-deformation ability of the fusing piece is increased to prevent the fire prevention check valve from automatically failing in a low-temperature environment.

[0015] Further, the fusing component includes at least one fusing ring. The fusing ring is provided with a mounting hole. The fusing ring is sleeved on the fastener and is used for controlling the range of the axial movement of the stop plate on the fastener. The fusing ring can be used to prevent the fire prevention check valve from automatically failing in a low-temperature environment.

[0016] Further, the stop plate includes a body, the anti-rotation portion is formed by bending the upper end of the body inward, the stop plate further is provided with a clamping portion formed by bending the lower end of the body inward, a limiting channel is provided on the body, after the temperature sensing mechanism operates, the stop plate moves axially along the limiting channel and separates from the dial. With such a design, the forming process of the stop plate is simple and the processing speed is fast. In addition, the anti-rotation portion and the clamping portion are respectively formed by bending the body inward, and this structure can reduce the volume of the stop plate.

[0017] Further, the limiting channel is an oval hole, the long axis section of the oval hole is arranged vertically, and the short axis section of the oval hole is arranged horizontally; or, the limiting channel is a polygonal hole, the vertical length of the polygonal hole > the horizontal length of the polygonal hole; or, the limiting channel is an irregularly shaped hole, the vertical length of the irregularly shaped hole > the horizontal length of the irregularly shaped hole. With such a design, the stop plate can slide and / or rotate along the fastener to prevent the stop plate from being stuck on the fastener when the stop plate cannot slide along the fastener and causing the stop plate to be unable to move.

[0018] Further, the fastener includes a screw, the screw sequentially passes through the fusing assembly and the stop plate and is threadedly connected to the base; or, the fastener includes a bolt and a nut, the bolt sequentially passes through the fusing assembly, the stop plate and the base and is threadedly connected to the nut; or, the fastener includes a bolt and a nut, the bolt sequentially passes through the stop plate, the base and the fusing assembly and is threadedly connected to the nut. When the fastener includes a screw, the screw can conveniently change the distance between the screw head and the base to adjust the clamping force received by the stop plate. When the fastener includes a bolt and a nut, the bolt can conveniently change the distance between the bolt head and the base to adjust the clamping force received by the stop plate; the nut can increase the connection strength between the bolt and the base.

[0019] Further, the base includes a valve seat and a fixing plate, the fixing plate is arranged on the valve seat, the stop plate is clamped between the temperature sensing mechanism and the fixing plate; or the base includes a valve seat, the stop plate is clamped between the temperature sensing mechanism and the valve seat. With such a design, the connection position between the base and the temperature sensing mechanism is convenient to adjust. In other words, the size of the fixing plate can be adaptively changed according to the temperature sensing mechanism.

[0020] Furthermore, the fixed plate is provided with an extension section extending along the valve seat in the opposite direction of smoke exhaust, the extension section is arranged at an angle, the extension section is located outside the valve seat, and the extension section is connected to the stop plate, and a slot is arranged on the extension section. With such a design, the extension section is closer to the range hood than the valve seat, which shortens the reaction time required for the fire check valve to play a role in fire prevention and smoke isolation after a fire breaks out indoors. When the extension section is arranged at an angle, the stop plate is inclined against the extension section, which allows the force of the paddle acting on the stop plate to be decomposed into a vertical thrust and a horizontal thrust, so as to prevent the stop plate from getting stuck on the paddle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional diagram of a locking structure in a preferred embodiment of the present invention;

[0022] Figure 2 is a top view of the locking structure in a preferred embodiment of the present invention;

[0023] Figure 3 yes Figure 2 AA is a cross-sectional view of the first embodiment;

[0024] Figure 4 yes Figure 2 AA is a cross-sectional view of the second embodiment;

[0025] Figure 5 yes Figure 2 AA is a cross-sectional view of the third embodiment;

[0026] Figure 6 is a three-dimensional diagram of a partial locking structure in a preferred embodiment of the present invention;

[0027] Figure 7 It is a cross-sectional view of the fuse assembly in the fourth embodiment of the present invention. DETAILED DESCRIPTION

[0028] 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.

[0029] Embodiment 1

[0030] See also Figure 1 The locking structure includes a base 1, a connecting rod 2, an elastic element and a paddle 3. The connecting rod 2 and the paddle 3 are rotatably arranged on the base 1. One end of the elastic element is arranged on the base 1, and the other end of the elastic element is arranged on the paddle 3 and is used to drive the paddle 3 to rotate relative to the base 1.

[0031] It should be noted that the existing elastic element is a torsion spring, which is sleeved on the rotating shaft of the dial 3. When the torsion spring is sleeved on the rotating shaft of the dial 3, one end of the torsion spring is fixed to the base 1 in a plug-in manner, and the other end of the torsion spring abuts against the upper end surface of the dial 3. Since the elastic element is not the focus of the present invention, therefore, the structure of the elastic element and the connection structure between the elastic element and other components are not specifically limited in this embodiment. In other words, in this embodiment, the elastic element can be selected as a helical spring, and the elastic element can also be selected as a spring plate. The helical spring and the spring plate can be arranged on the base 1 and the dial 3 in a manner different from the torsion spring, as long as the helical spring or the spring plate can drive the dial 3 to rotate relative to the base.

[0032] See Figure 1 , which is different from the prior art in that: the locking structure of this embodiment further includes a temperature sensing mechanism 4 and a stop plate 5. The stop plate 5 is clamped between the temperature sensing mechanism 4 and the base 1. A rotation prevention portion 51 is provided on the stop plate 5. When the stop plate 5 is clamped between the temperature sensing mechanism 4 and the base 1, the rotation prevention portion 51 is arranged on the dial 3 to prevent the dial 3 from rotating relative to the base 1. After the temperature sensing mechanism 4 acts, the stop plate 5 moves relative to the base 1 and separates the rotation prevention portion 51 from the dial 3.

[0033] See Figure 2 and Figure 3 , the temperature sensing mechanism 4 of this embodiment includes a fastener 41 and a fusing component. The fastener 41 is arranged on the base 1, and the fusing component is arranged on the fastener 41. The stop plate 5 is clamped between the fusing component and the base 1. After the fusing component acts, the stop plate 5 moves axially along the fastener 41 and separates the rotation prevention portion 51 from the dial 3. This embodiment only lists the components of one of the temperature sensing mechanisms. In other embodiments of the present invention, the temperature sensing mechanism can be other structures. For example: the temperature sensing mechanism only includes shape memory alloy, and the stop plate is clamped between the shape memory alloy and the base. The shape memory alloy deforms in a temperature sensing environment, which causes the clamping force on the stop plate to disappear; or, the temperature sensing mechanism only includes a fusing component, and the stop plate is clamped between the fusing component and the base; or, the temperature sensing mechanism includes a mounting plate arranged on the base and a fusing component, and the fusing component is arranged on the mounting plate, and the stop plate is clamped between the fusing component and the base. Therefore, all locking structures in which the stop plate is clamped between the fusing component and the base are within the protection scope of the present invention.

[0034] Preferably, the fusing component includes at least one fusing piece 42. The fusing piece 42 includes a first fusing portion 422, a second fusing portion 423, and a third fusing portion 421 for controlling the axial movement range of the stop plate 5 on the fastener 41. The first fusing portion 422 and the second fusing portion 423 are respectively arranged on the fastener 41, and the third fusing portion 421 is used to connect the first fusing portion 422 and the second fusing portion 423.

[0035] SeeFigure 3 and Figure 6 , the stop plate 5 of this embodiment includes a body 52. The anti-rotation part 51 is formed by bending the upper end of the body 52 inward. The stop plate 5 is further provided with a clamping part 53 formed by bending the lower end of the body 52 inward. A limiting channel 521 is provided on the body 52. After the temperature sensing mechanism 4 acts, the stop plate 5 moves axially along the limiting channel 521 and separates from the dial 3.

[0036] From Figure 6 it can be seen that the limiting channel 521 of this embodiment is an oval hole. The long axis section of the oval hole 521 is arranged vertically, and the short axis section of the oval hole is arranged horizontally. With such a design, the stop plate 5 can slide along the fastener 41, and the stop plate 5 can also rotate along the fastener 41. This means that when the stop plate 5 cannot slide along the fastener 41, the stop plate 5 can rotate around the fastener 41 to further increase the working reliability of the dial 3. In other embodiments of the present invention, the limiting channel is a polygonal hole, and the vertical length of the polygonal hole > the horizontal length of the polygonal hole; or, the limiting channel is an irregularly shaped hole, and the vertical length of the irregularly shaped hole > the horizontal length of the irregularly shaped hole.

[0037] From Figure 3 it can be seen that the fastener 4 of this embodiment includes a screw. The screw sequentially passes through the fusing assembly and the stop plate 5 and is threadedly connected to the base 1. Specifically: through holes are respectively provided on the first fusing part 422, the second fusing part 423 and the stop plate 5, and a threaded hole is provided on the base 1. After the screw sequentially passes through the through hole on the first fusing part 422, the through hole on the second fusing part 423 and the through hole on the stop plate 5, it is fixedly connected to the threaded hole on the base 1. In other embodiments of the present invention, the fastener includes a bolt and a nut. The bolt sequentially passes through the fusing assembly, the stop plate and the base and is threadedly connected to the nut; or, the fastener includes a bolt and a nut. The bolt sequentially passes through the stop plate, the base and the fusing assembly and is threadedly connected to the nut.

[0038] See Figure 1 , in this embodiment, the base 1 includes a valve seat 11 and a fixing plate 12. The fixing plate 12 is arranged on the valve seat 11. The stop plate 5 is clamped between the temperature sensing mechanism 4 and the fixing plate 12. Of course, in other embodiments of the present invention, the base may only include a valve seat, and the stop plate is clamped between the temperature sensing mechanism and the valve seat.

[0039] Combined with Figure 2 and Figure 3It can be seen that the fixing plate 12 is provided with an extension section 121 extending along the reverse smoke exhaust direction of the valve seat 11. The extension section 121 is located outside the valve seat 11, and the extension section 121 is connected to the stop plate 5. Preferably, a clamping groove 1211 is provided on the extension section 121, and the lower end of the stop plate 4 is clamped in the clamping groove 1211 to realize the fixed connection between the stop plate 5 and the fixing plate 12.

[0040] In this embodiment, the "reverse smoke exhaust direction" is the direction in which the flue gas in the exhaust duct flows into the room.

[0041] In this embodiment, the fuse piece 42 can be made of one or more of fusible solders such as bismuth-based, indium-based, tin-based, cadmium-based, zinc-based, and lead-based.

[0042] Embodiment 2

[0043] The difference from Embodiment 1 is that in this embodiment, the fuse assembly is structurally improved.

[0044] See Figure 4 , in this embodiment, the fuse assembly includes at least one fuse piece 42 and at least one stop ring 43. The stop ring 43 is made of fusible solder or metal, and the stop ring 43 is clamped between the first fuse part 422 and the second fuse part 423 of the fuse piece 42. When the stop ring 43 is made of metal, the stop ring 43 will not be melted. When the stop ring is made of fusible solder, the stop ring 43 and the fuse piece 42 will be melted at the same time. With such a design, the anti-deformation ability of the fuse piece 42 will be significantly enhanced, and the fire check valve will prevent automatic failure in a low-temperature environment.

[0045] In this embodiment, in addition to being clamped between the first fuse part 422 and the second fuse part 423 of the fuse piece 42, the stop ring 43 of this embodiment can also be clamped between two adjacent fuse pieces 42.

[0046] Embodiment 3

[0047] The difference from Embodiment 1 is that in this embodiment, the fuse assembly is structurally improved.

[0048] See Figure 5 , in this embodiment, the fuse assembly includes at least one fuse ring 43. The fuse ring 43 is provided with a mounting hole, and the fuse ring 43 is sleeved on the fastener 41 and used to control the axial movement range of the stop plate 5 on the fastener 41.

[0049] Embodiment 4

[0050] The difference from Embodiment 1 is that in this embodiment, the fuse assembly is structurally improved.

[0051] See Figure 7, in this embodiment, the fusing component includes a first metal plate 441, a second metal plate 442, and a solder 443 for connecting the first metal plate 441 and the second metal plate 442. The first metal plate 441 and the second metal plate 442 are respectively arranged on the fastener 41. The gap between the first metal plate 441 and the second metal plate 442 in the axial direction of the fastener 41 is the range of the axial movement of the stop plate 5 on the fastener 41. Specifically: both the first metal plate 441 and the second metal plate 442 are L-shaped. The first metal plate 441 includes a first connecting portion 4411 and a first welding portion 4412 formed by bending the first connecting portion 4411. The second metal plate 442 includes a second connecting portion 4421 and a second welding portion 4422 formed by bending the second connecting portion 4421. The first welding portion 4421 and the second welding portion 4422 are connected into one body by the solder 443. After the first welding portion 4412 and the second welding portion 4422 are connected into one body by the solder 443, the gap between the first connecting portion 4411 and the second connecting portion 4412 is the range of the axial movement of the stop plate 5 on the fastener 41. The advantage of the L-shaped first metal plate 441 and the L-shaped second metal plate 442 is that they can cover the head of the fastener 41, that is, the head of the screw or the head of the bolt, and reduce the probability of the head of the fastener 41 hitting other components. In other embodiments of the present invention, the first metal plate can be "concave-shaped", and the second metal plate can be "linear-shaped"; or, the first metal plate is "U-shaped", and the second metal plate is "Y-shaped".

[0052] In this embodiment, by changing the thrust of the stop plate 5 acting on the fusing component, the service life of the fusing component is increased.

[0053] In this embodiment, a first avoidance hole 4413 for avoiding the fastener 41 is provided on the first connecting portion 4411, and a second avoidance hole 4423 for avoiding the fastener 41 is provided on the second connecting portion 4421. The aperture of the first avoidance hole 4413 > the aperture of the second avoidance hole 4423, and the first connecting portion 4411 can abut against the stop plate 5. This structure facilitates the rotation of the stop plate 5 relative to the first avoidance hole 4413.

[0054] As described above, only the specific embodiments of the present invention are provided, 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 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 locking structure, comprising a base, a connecting rod, an elastic element and a paddle. The connecting rod and the paddle are rotatably arranged on the base. One end of the elastic element is arranged on the base, and the other end of the elastic element is arranged on the paddle and is used to drive the paddle to rotate relative to the base. It is characterized in that, It further includes a temperature sensing mechanism and a stop plate. The stop plate is clamped between the temperature sensing mechanism and the base. The stop plate is provided with an anti-rotation portion. When the stop plate is clamped between the temperature sensing mechanism and the base, the anti-rotation portion is arranged on the dial to prevent the dial from rotating relative to the base. After the temperature sensing mechanism operates, the stop plate moves relative to the base and separates the anti-rotation portion from the dial; The base includes a valve seat and a fixing plate. The fixing plate is arranged on the valve seat. The fixing plate is provided with an extension section extending along the reverse smoke exhaust direction of the valve seat, and a clamping groove is arranged on the extension section; Wherein, the lower end of the stop plate is clamped in the clamping groove.

2. The locking structure according to claim 1, characterized in that, The temperature sensing mechanism includes a fastener and a fusing component. The fastener is arranged on the base, the fusing component is arranged on the fastener, and the stop plate is clamped between the fusing component and the base. After the fusing component operates, the stop plate moves axially along the fastener and separates the anti-rotation portion from the dial.

3. The locking structure according to claim 2, characterized in that, The fusing component includes a first metal plate, a second metal plate and a solder for connecting the first metal plate and the second metal plate. The first metal plate and the second metal plate are respectively arranged on the fastener. The gap between the first metal plate and the second metal plate in the axial direction of the fastener is the axial movement range of the stop plate on the fastener; both the first metal plate and the second metal plate are L-shaped. The first metal plate includes a first connecting portion and a first welding portion formed by bending the first connecting portion. The second metal plate includes a second connecting portion and a second welding portion formed by bending the second connecting portion. The first welding portion and the second welding portion are connected into one body by the solder. After the first welding portion and the second welding portion are connected into one body by the solder, the gap between the first connecting portion and the second connecting portion is the axial movement range of the stop plate on the fastener; a first avoidance hole for avoiding the fastener is arranged on the first connecting portion, a second avoidance hole for avoiding the fastener is arranged on the second connecting portion, the aperture of the first avoidance hole > the aperture of the second avoidance hole, and the first connecting portion can abut against the stop plate.

4. The locking structure according to claim 2, characterized in that, The fusing component includes at least one fusing piece. The fusing piece includes a first fusing portion, a second fusing portion and a third fusing portion for controlling the axial movement range of the stop plate on the fastener. The first fusing portion and the second fusing portion are respectively arranged on the fastener, and the third fusing portion is used for connecting the first fusing portion and the second fusing portion; the fusing component further includes at least one stop ring. The stop ring is made of fusible solder or metal, and the stop ring is clamped between the first fusing portion and the second fusing portion; or, the stop ring is clamped between two adjacent fusing pieces.

5. The locking structure according to claim 2, characterized in that, The fusing component includes at least one fusing ring. The fusing ring is provided with a mounting hole. The fusing ring is sleeved on the fastener and is used for controlling the axial movement range of the stop plate on the fastener.

6. The locking structure according to claim 1, characterized in that, The stop plate includes a body. The rotation prevention portion is formed by bending the upper end of the body inward. The stop plate further has a clamping portion formed by bending the lower end of the body inward. A limiting channel is provided on the body. After the temperature sensing mechanism operates, the stop plate moves axially along the limiting channel and separates from the dial.

7. The locking structure according to claim 6, characterized in that, The limiting channel is an oval hole. The long axis section of the oval hole is arranged vertically, and the short axis section of the oval hole is arranged horizontally; or, the limiting channel is a polygonal hole, and the vertical length of the polygonal hole > the horizontal length of the polygonal hole; or, the limiting channel is an irregularly shaped hole, and the vertical length of the irregularly shaped hole > the horizontal length of the irregularly shaped hole.

8. The locking structure according to claim 2, characterized in that, The fastener includes a screw. The screw sequentially passes through the fuse assembly and the stop plate and is threadedly connected to the base; or, the fastener includes a bolt and a nut. The bolt sequentially passes through the fuse assembly, the stop plate and the base and is threadedly connected to the nut; or, the fastener includes a bolt and a nut. The bolt sequentially passes through the stop plate, the base and the fuse assembly and is threadedly connected to the nut.

9. The locking structure according to claim 1, characterized in that, The stop plate is clamped between the temperature sensing mechanism and the fixing plate.

10. The locking structure according to claim 9, characterized in that, The extension section is inclined. The extension section is located outside the valve seat and is connected to the stop plate.

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