Quick-response over-voltage protection switch device

Abstract

The utility model provides a quick-response over-voltage protection switch device. The quick-response over-voltage protection switch device comprises a main body, a base, an elastic disc, a sliding support assembly and at least one group of contact assemblies, the base is arranged at one end of the main body, and a channel is formed in the base; the elastic disc is clamped between the base and the main body and covers the corresponding end of the channel in a sealing manner; the sliding supporting assembly is clamped in the body in a sliding mode, one end of the sliding supporting assembly abuts against the elastic disc, and an elastic assembly is arranged between the other end of the sliding supporting assembly and the inner wall of the body. The contact assembly comprises a static contact and a movable contact, the static contact is fixed in the main body, the movable contact is fixed on the sliding support assembly and corresponds to the static contact, and the movable contact and the static contact can be connected / disconnected when the sliding support assembly slides back and forth in the main body. The high-temperature protection circuit is high in response speed and long in service life during use, and can be used for high-temperature protection.

Description

Technical Field

[0001] This application belongs to the technical field of safety protection switch devices, and particularly relates to a fast-response overpressure protection switch device. Background Art

[0002] HVAC systems are mainly used to provide a comfortable environment indoors for people to work, study, and rest. To ensure their safety during use, an overpressure protection device is generally installed in the HVAC system so that when the pressure it provides is too high, it can automatically disconnect to avoid accidents. However, most of the currently used overpressure protection devices have a slow response speed, are difficult to provide effective protection during instantaneous overpressure, are prone to failure after multiple operations, and have a short service life. In addition, the existing overpressure protection devices can only be used in the case of too high pressure, and when the temperature of the heating system is too high, they cannot provide effective protection. Therefore, in the actual application process, if the safety of the HVAC system is to be ensured, a high-temperature protection device needs to be further installed, which greatly increases the production cost of the HVAC system. Summary of the Utility Model

[0003] This application aims to solve the technical problems in the prior art that the overpressure protection switch for HVAC systems has a slow response speed, a short service life, and cannot be used for high-temperature protection; and proposes a fast-response overpressure protection switch device to achieve the technical effects of fast response, long service life, and being able to be used for high-temperature protection.

[0004] To achieve the above object, this application adopts the following technical solutions:

[0005] A fast-response overpressure protection switch device includes a main body, a base, an elastic disc, a sliding support assembly, and at least one set of contact assemblies;

[0006] The base is disposed at one end of the main body. Among them, a channel is provided on the base, and one end of the channel is located at the connection between the base and the main body;

[0007] The elastic disc is snap-fitted between the base and the main body and seals and covers the corresponding end of the channel;

[0008] The sliding support assembly is slidably snap-fitted inside the main body. One end of the sliding support assembly abuts against the elastic disc, and an elastic component is provided between the other end and the inner wall of the main body. The elastic component pushes the sliding support assembly to slide along the direction close to the elastic disc and squeezes the elastic disc to deform in the direction of the channel;

[0009] The contact assembly includes a stationary contact and a moving contact. The stationary contact is fixed within the main body, and the moving contact is fixed on the sliding support assembly and corresponds to the stationary contact. When the sliding support assembly reciprocates within the main body, the connection / disconnection between the moving contact and the stationary contact can be achieved.

[0010] Further, a connecting thread or a quick-connect slot is provided on the outer wall of one end of the base away from the main body.

[0011] Further, a sealing ring is provided at the connection between the elastic disc and the base.

[0012] Further, the sliding support assembly includes a top plate and a top rod. The top plate and the top rod are perpendicularly fixed to each other. The moving contact is fixed on the top plate. The elastic component abuts against the top plate, and one end of the top rod away from the top plate abuts against the elastic disc.

[0013] Further, a limiting rod is also provided on the top plate, and a limiting hole is provided on the main body corresponding to the limiting rod. The limiting rod is slidably inserted into the limiting hole.

[0014] Further, the elastic component includes at least one balance spring, and the balance spring is arranged between the inner side of the main body and the sliding support assembly.

[0015] Further, at least one screw hole is provided on the main body corresponding to the elastic component. The screw holes are arranged in one-to-one correspondence with the balance springs. A pressing stud is screwed into the screw hole. One end of the balance spring is inserted into the screw hole and abuts against the pressing stud, and the other end abuts against the sliding support assembly.

[0016] Further, the elastic disc is a thermosensitive metal disc.

[0017] The beneficial effects of this application are as follows:

[0018] In this application, by using the elastic disc as the triggering part for overpressure trigger protection, the protection switch device can respond quickly when overpressure occurs. At the same time, the elastic disc uses a thermosensitive metal disc, which can also deform when in a high-temperature situation, thereby triggering the protection mechanism, effectively expanding the applicable range of the overpressure protection switch device. Moreover, the thermosensitive metal disc has good durability and can effectively extend the service life of the overpressure protection switch.

[0019] In this application, through the mutual cooperation between the sliding support assembly and the elastic component, the overpressure protection switch device can achieve automatic reset after the system returns to normal, thus greatly improving its usability.

[0020] Through the mutual cooperation between the screw hole and the pressing stud, during use, the elastic force of the balance spring can be adjusted as needed by rotating the pressing stud, thereby achieving the effect of adjusting the overpressure critical point. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a cross-sectional schematic diagram of the overpressure protection switch device provided in the embodiment of the present application in the on state.

[0023] Figure 2 It is a cross-sectional schematic diagram of the overpressure protection switch device provided in the embodiment of the present application in the on state from another direction.

[0024] Figure 3 It is a cross-sectional schematic diagram of the overpressure protection switch device provided in the embodiment of the present application in the off state.

[0025] Figure 4 It is a schematic assembly structure diagram of the elastic disc 3, the sliding support assembly and the contact assembly provided in the embodiment of the present application.

[0026] Explanation of the Reference Numerals in the Drawings:

[0027] Main body 1, base 2, elastic disc 3, channel 4, static contact 5, moving contact 6, quick-connect slot 7, sealing ring 8, top plate 9, ejector rod 10, limit rod 11, balance spring 12, pressing stud 13. Detailed Embodiment

[0028] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0029] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0030] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" shall be construed broadly. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection, an electrical connection or a connection capable of mutual communication; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0031] In the present application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0032] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0033] An embodiment of the present application provides a fast-response overpressure protection switch device, as Figures 1 to 4 shown, which includes a main body 1, a base 2, an elastic disc 3, a sliding support assembly, and three groups of contact assemblies; among them, the number of the contact assemblies is not limited to three groups. In actual application, the number of the contact assemblies can be more than one group, and those skilled in the art can determine the specific number of the contact assemblies according to actual needs.

[0034] The base 2 is arranged at one end of the main body 1. Among them, a channel 4 is provided on the base 2, and one end of the channel 4 is located at the connection between the base 2 and the main body 1; the elastic disc 3 is clamped between the base 2 and the main body 1 and hermetically covers the corresponding end of the channel 4; the elastic disc 3 is a thermosensitive metal disc. The use of the thermosensitive metal disc enables the overpressure protection switch device to deform when the system in which it is applied has a high-temperature situation, thereby triggering the protection mechanism, effectively improving the applicable range of the overpressure protection switch device, and the thermosensitive metal disc has good durability and can effectively improve the service life of the overpressure protection switch.

[0035] The sliding support assembly is slidably clamped in the main body 1. One end of the sliding support assembly abuts against the elastic disc 3, and an elastic component is provided between the other end and the inner wall of the main body 1. The elastic component pushes the sliding support assembly to slide along the direction close to the elastic disc 3 and squeezes the elastic disc 3 to deform in the direction of the channel 4;

[0036] Among them, the sliding support assembly includes a top plate 9 and a top rod 10. The top plate 9 and the top rod 10 are fixedly perpendicular to each other. One end of the top rod 10 away from the top plate 9 abuts against the elastic disc 3. The elastic component includes two balance springs 12. Two screw holes are provided on the main body 1, and the two screw holes are arranged in one-to-one correspondence with the two balance springs 12. A pressing stud 13 is screwed into the screw hole. During installation, one end of the balance spring 12 is inserted into the screw hole and abuts against the pressing stud 13, and the other end abuts against the top plate 9. In actual application, the number of the balance springs 12 is not limited to the above two. Those skilled in the art can determine the specific number of the balance springs 12 according to actual needs. At the same time, the number of screw holes is the same as the number of balance springs 12.

[0037] The contact component includes a static contact 5 and a moving contact 6. The static contact 5 is fixed inside the main body 1, and the moving contact 6 is fixed on the top plate 9 and corresponds to the static contact 5. When the sliding support assembly reciprocates inside the main body 1, the moving contact 6 and the static contact 5 can be connected / disconnected.

[0038] To facilitate connection with an external system, a quick-connect slot 7 is provided on the outer wall of one end of the base 2 away from the main body 1. In actual application, the quick-connect slot 7 can also be set as a connection thread or other structures that are convenient for connecting with an external system.

[0039] To further improve the connection sealing performance between the elastic disc 3 and the base 2, a sealing ring 8 is provided at the connection between the elastic disc 3 and the base 2.

[0040] To further improve the installation convenience of the sliding support assembly and its stability during use, a limiting rod 11 is further provided on the top plate 9, and a limiting hole is provided on the main body 1 at a position corresponding to the limiting rod 11. The limiting rod 11 is slidably inserted into the limiting hole.

[0041] The usage process of this application is briefly described as follows:

[0042] First, as shown in Figure 1 and Figure 2 , in the case of normal use, due to the existence of the balance spring 12, the sliding support assembly is pushed by the elastic force of the balance spring 12 towards the elastic disc 3 and squeezes the elastic disc 3 to deform it towards the direction of the channel 4. At the same time, the moving contact 6 provided on the top plate 9 is connected to the static contact 5. When the system to which it is applied has an overpressure situation (when the gas pressure is greater than the elastic force of the balance spring 12), as shown in Figure 3As shown in the figure, the overpressure gas squeezes the elastic disc 3 through the channel 4, causing it to deform in the direction of the sliding support assembly and pushing the sliding support assembly to move in the direction of the balance spring 12. At this time, the moving contact 6 is disconnected from the static contact 5, thus achieving the protection effect. In this application, since the elastic disc 3 is a thermosensitive metal disc, when the temperature of the system exceeds the phase change temperature of the thermosensitive metal disc, it will also undergo elastic deformation, thereby pushing the sliding support assembly to move in the direction of the balance spring 12, so that the moving contact 6 is disconnected from the static contact 5.

[0043] The above has introduced in detail a fast-response overpressure protection switch device provided by an embodiment of the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A fast-response overpressure protection switch device, characterized in that: It includes a main body, a base, an elastic disc, a sliding support assembly and at least one set of contact assemblies; The base is arranged at one end of the main body, wherein a channel is arranged on the base, and one end of the channel is located at the connection between the base and the main body; The elastic disc is clamped between the base and the main body and sealed to cover the corresponding end of the channel; The sliding support component is slidably engaged in the main body, one end of the sliding support component is in contact with the elastic disc, and an elastic component is arranged between the other end and the inner wall of the main body, and the elastic component pushes the sliding support component to slide in a direction close to the elastic disc and squeezes the elastic disc to deform in the direction of the channel; The contact assembly includes a static contact and a moving contact, wherein the static contact is fixed in the main body, and the moving contact is fixed on the sliding support assembly and corresponds to the static contact, and the sliding support assembly can realize the connection / disconnection of the moving contact and the static contact when sliding back and forth in the main body.

2. The fast-response overpressure protection switch device according to claim 1, characterized in that: A connecting thread or a quick-connect slot is provided on an outer wall of one end of the base away from the main body.

3. The fast-response overpressure protection switch device according to claim 1, characterized in that: A sealing ring is provided at the connection between the elastic disc and the base.

4. The fast-response overpressure protection switch device according to claim 1, characterized in that: The sliding support assembly includes a top plate and a top rod, the top plate and the top rod are fixed vertically to each other, the moving contact is fixed to the top plate, the elastic assembly abuts against the top plate, and one end of the top rod away from the top plate abuts against the elastic disc.

5. The fast-response overpressure protection switch device according to claim 4, characterized in that: The top plate is also provided with a limiting rod, and the main body is provided with a limiting hole at a position corresponding to the limiting rod, and the limiting rod is slidably inserted into the limiting hole.

6. The fast-response overpressure protection switch device according to claim 1, characterized in that: The elastic component includes at least one balance spring, and the balance spring is arranged between the inner side of the main body and the sliding support component.

7. The fast-response overpressure protection switch device according to claim 6, characterized in that: At least one screw hole is provided on the main body at a position corresponding to the elastic component, and the screw holes are arranged in a one-to-one correspondence with the balance springs. A clamping stud is screwed into the inner thread of the screw hole, one end of the balance spring is inserted into the screw hole and abuts against the clamping stud, and the other end abuts against the sliding support component.

8. The fast-response overpressure protection switch device according to claim 1, characterized in that: The elastic disc is a heat-sensitive metal disc.

Images