Mechanical explosion-proof temperature controller

Abstract

This utility model discloses a mechanical explosion-proof thermostat, belonging to the technical field of thermostats. The device includes an explosion-proof body and a cover plate. The explosion-proof body includes an insulating shell, and an actuation control component is disposed inside the insulating shell. The inner edge of the insulating shell is threaded. The bottom of the cover plate is provided with a threaded retaining ring that mates with the threaded inner edge of the insulating shell. An inner ring plate is disposed along the inner edge of the insulating shell, and a sealing gap exists between the inner ring plate and the inner edge of the insulating shell. Multiple sealing gaskets are fixedly disposed on one side of the inner ring plate within the sealing gap. When the cover plate is screwed into the insulating shell, the threaded retaining ring embeds into the sealing gap and mates with multiple sets of annular protrusions on the outer side of the multiple sealing gaskets fixed on the inner ring plate. The multiple sets of annular protrusions elastically press against the inner side of the threaded retaining ring, forming a multi-stage sealing effect, thereby improving the stability of the sealing effect at the cover plate, effectively resisting the intrusion of external corrosive substances, and extending the service life of the thermostat.

Description

Technical Field

[0001] This utility model relates to the field of temperature controller technology, and in particular to a mechanical explosion-proof temperature controller. Background Technology

[0002] Thermostats can automatically adjust equipment operation according to changes in ambient temperature. Mechanical explosion-proof thermostats are temperature control devices designed specifically for hazardous environments such as flammable, explosive, and corrosive environments. They do not rely on electronic components but achieve temperature sensing and control through mechanical structures.

[0003] In chemical workshops where concentrated hydrochloric acid is stored and used, the acid is volatile and easily releases hydrogen chloride (HCl) gas during storage. When this gas mixes with air and reaches a certain concentration, it can explode upon contact with a source of ignition, such as a static spark or high temperature, causing serious damage. Therefore, mechanical explosion-proof temperature controllers are typically used in such workshops.

[0004] Mechanical explosion-proof thermostats typically have multiple openings for wiring and future maintenance. The side cover of the thermostat, due to its large exposed area, is more susceptible to corrosion from acids, alkalis, and dust under prolonged exposure to corrosive environments. This can cause the sealing rings to age, increasing the likelihood of seal failure. Furthermore, after equipment installation, this cover is more exposed to vibration and impact, which can lead to loosening of fasteners or displacement of the sealing rings. All of these factors can reduce the thermostat's sealing performance, potentially allowing hydrogen chloride gas to enter the housing, corroding internal circuit components and shortening their lifespan. Utility Model Content

[0005] This invention provides a mechanical explosion-proof temperature controller, which can solve the problem that the sealing effect of mechanical explosion-proof temperature controllers is easily affected by the environment in corrosive environments.

[0006] A mechanical explosion-proof temperature controller includes an explosion-proof body and a cover plate. The explosion-proof body includes an insulating shell, an actuation control component is disposed on the inner side of the insulating shell, and a thread is disposed along the inner edge of the insulating shell. A threaded retaining ring is disposed at the bottom of the cover plate, which mates with the thread along the inner edge of the insulating shell. An inner ring plate is disposed along the inner edge of the insulating shell, and a sealing gap exists between the inner ring plate and the inner edge of the insulating shell. A multi-ring sealing gasket is fixedly disposed on one side of the inner ring plate located within the sealing gap. The surface of the multi-ring sealing gasket is provided with multiple sets of protrusions that abut against the inner side of the threaded retaining ring.

[0007] As a further embodiment of this utility model: the insulating shell is provided with an electrical cavity and a fixing cavity, the execution control component and the inner ring plate are both located inside the electrical cavity, the electrical cavity is provided with a plurality of threaded holes for fixing the execution control component, the fixing cavity is provided with studs at positions corresponding to the threaded holes, and the threaded holes are not connected to the fixing cavity.

[0008] As a further embodiment of this utility model: the annular protrusion on the multi-ring sealing gasket has a triangular cross-section.

[0009] As a further embodiment of this utility model, the inner side of the threaded retaining ring is smoothly disposed.

[0010] As a further embodiment of this utility model: a bracket is provided on the side of the insulating shell away from the cover plate, the bracket includes a mounting base connected to an external mounting component, a support plate is fixedly provided on the mounting base, and a fixing plate detachably connected to the insulating shell is fixedly provided on the support plate.

[0011] As a further embodiment of this utility model: the shape of the fixing plate matches the shape of the opening of the fixing cavity.

[0012] As a further embodiment of this utility model, a plurality of fixing studs that are bolted to the fixing plate are fixedly arranged inside the fixing cavity.

[0013] As a further embodiment of this utility model, a sealing ring is provided on the upper side of the threaded retaining ring.

[0014] As a further embodiment of this utility model, the bottom of the threaded retaining ring is provided with a slope.

[0015] As a further embodiment of this invention, the multi-ring sealing gasket is made of silicone.

[0016] The beneficial effects of this utility model are:

[0017] 1. In this invention, when the cover plate is screwed into the insulating shell, the threaded retaining ring is embedded in the sealing gap and cooperates with multiple sets of annular protrusions on the outer side of the multi-ring sealing gasket fixed on the inner ring plate. The multiple sets of annular protrusions elastically press against the inner side of the threaded retaining ring, forming a multi-stage sealing effect. This improves the stability of the sealing effect at the cover plate. Even if some sealing structures are slightly affected, other sealing layers can still function, effectively resisting the intrusion of external corrosive substances and extending the service life of the thermostat. Furthermore, during disassembly and maintenance, the threaded retaining ring is unscrewed, and the multi-ring sealing gasket does not generate much resistance, thus not affecting the maintenance process.

[0018] 2. In use, the sloped bottom of the threaded retaining ring facilitates smoother insertion into the sealing gap and between the multi-ring sealing gasket during installation, reducing installation resistance. The outer edge of the annular protrusion on the multi-ring sealing gasket has an acute angle design. When the threaded retaining ring inserts, it causes the angle of the annular protrusion to bend along the cutting direction. Under the elastic compression, it further separates the spaces on the upper and lower sides of the annular protrusion, improving the isolation effect and enhancing the sealing performance. Attached Figure Description

[0019] Figure 1A schematic diagram of the overall structure of a mechanical explosion-proof temperature controller provided by this utility model;

[0020] Figure 2 A schematic diagram of the internal structure of the explosion-proof body of a mechanical explosion-proof temperature controller provided by this utility model;

[0021] Figure 3 A schematic diagram of the internal structure of the fixing cavity of a mechanical explosion-proof temperature controller provided by this utility model;

[0022] Figure 4 This utility model provides a schematic diagram of the longitudinal section structure of the explosion-proof body of a mechanical explosion-proof temperature controller.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Explosion-proof body; 101. Insulating shell; 102. Actuation and control components; 103. Inner ring plate; 104. Sealing gap; 105. Electrical cavity; 106. Fixing cavity; 107. Fixing stud; 108. Multi-ring sealing gasket; 2. Cover plate; 201. Sealing ring; 202. Threaded retaining ring; 3. Bracket; 301. Mounting base; 302. Support plate; 303. Fixing plate. Detailed Implementation

[0025] The specific embodiments of this utility model are described in detail below, but it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.

[0026] like Figures 1 to 4 As shown in the figure, the mechanical explosion-proof thermostat provided by this utility model embodiment includes two main parts: an explosion-proof body 1 and a cover plate 2. The explosion-proof body 1 includes an insulating shell 101, and an execution control component 102, i.e., a circuit system, is disposed inside the insulating shell 101. This is the core part that realizes the various functions of the thermostat. The insulating shell 101 has threads along its inner edge, and the bottom of the cover plate 2 has a threaded retaining ring 202 that mates with the threads along the inner edge of the insulating shell 101. A sealing ring 201 is also fitted on the upper side of the threaded retaining ring 202. As a first-layer seal, it provides a certain sealing effect when the cover plate 2 is connected to the insulating shell 101, preventing the initial intrusion of external substances.

[0027] Furthermore, an inner ring plate 103 is provided along the inner edge of the insulating shell 101, and a sealing gap 104 exists between the inner ring plate 103 and the inner edge of the insulating shell 101, such as... Figure 4As shown, a multi-ring sealing gasket 108 is fixedly installed on one side of the inner ring plate 103 within the sealing gap 104. The surface of the multi-ring sealing gasket 108 has multiple sets of protrusions arranged longitudinally to abut against the inner side of the threaded retaining ring 202. Here, the inner side of the threaded retaining ring 202 is smooth to ensure a tight fit with the protrusions of the multi-ring sealing gasket 108. When the cover plate 2 is screwed into the insulating shell 101, the threaded retaining ring 202 is embedded in the sealing gap 104. At this time, the inner side of the threaded retaining ring 202 engages with the multiple sets of annular protrusions on the outer side of the multi-ring sealing gasket 108. Specifically, the multiple sets of annular protrusions abut against the inner side of the threaded retaining ring 202 through elastic compression, forming a multi-stage sealing effect. This multi-stage sealing design greatly improves the stability of the sealing effect at the cover plate 2, effectively resisting the intrusion of external corrosive substances, thereby extending the service life of the mechanical explosion-proof temperature controller. Furthermore, during disassembly and maintenance, the threads of the threaded retaining ring 202 are unscrewed, and the multi-ring sealing gasket 108 does not generate significant resistance, thus not affecting the maintenance process.

[0028] To facilitate the rotation and insertion of the threaded retaining ring 202 into the sealing gap 104 and the multi-ring sealing gasket 108, the bottom of the threaded retaining ring 202 is sloped. This allows the threaded retaining ring 202 to insert more smoothly when installing the cover plate 2, reducing resistance during installation. Simultaneously, the annular protrusion on the multi-ring sealing gasket 108 preferably has a triangular cross-section, meaning the outer edge of the annular protrusion has an acute angle. When the threaded retaining ring 202 inserts into the sealing gap 104 and the multi-ring sealing gasket 108, it causes the angle of the annular protrusion to bend along the insertion direction of the threaded retaining ring 202. Under elastic compression, this bending further separates the spaces on the upper and lower sides of the annular protrusion, effectively improving the isolation effect and enhancing the sealing performance. The multi-ring sealing gasket 108 is preferably made of silicone, which has good elasticity, corrosion resistance, and sealing properties. Of course, other sealing materials with elastic properties, such as rubber, polytetrafluoroethylene, or fluororubber, can also meet the sealing requirements in different environments and are all within the scope of this patent.

[0029] In one specific embodiment, the insulating shell 101 is provided with an electrical cavity 105 and a fixed cavity 106. The actuation control component 102 and the inner ring plate 103 are both located inside the electrical cavity 105. This layout ensures that the core components operate in a relatively independent and safe space. The electrical cavity 105 has multiple sets of threaded holes for fixing the actuation control component 102, while the fixed cavity 106 has studs at corresponding positions to the threaded holes, and the threaded holes are not connected to the fixed cavity 106. During installation, the screws in the electrical cavity fix the actuation control component 102 to the bottom of the electrical cavity through the studs. Because the threaded holes are not connected to the fixed cavity 106, corrosive gases and dust from the outside cannot enter the electrical cavity through the threaded holes, thus ensuring a relatively sealed environment within the electrical cavity.

[0030] A bracket 3 is provided on the side of the insulating shell 101 away from the cover plate 2. The bracket 3 is used to fix the explosion-proof body 1. The bracket 3 includes a mounting base 301 that connects to external mounting components. A support plate 302 is fixedly mounted on the mounting base 301, and a fixing plate 303 is fixedly mounted on the support plate 302. The shape of the fixing plate 303 matches the shape of the opening of the fixing cavity 106 to ensure that the two can fit tightly. Multiple sets of fixing studs 107 are fixedly mounted inside the fixing cavity 106 and bolted to the fixing plate 303, such as... Figure 3 As shown. During installation, the insulating shell 101 is fixed to the fixing plate 303 with bolts, so that the fixing plate 303 and the insulating shell 101 fit tightly together. Thus, the explosion-proof body 1 can be fixed by installing the mounting base 301, and the overall installation is completed.

[0031] Working principle: When the cover plate 2 is connected to the insulating shell 101, the sealing ring 201, which is fitted on the upper side of the threaded retaining ring 202, functions as the first layer of sealing. It can prevent the initial intrusion of external substances and reduce the risk of corrosive substances directly contacting internal components.

[0032] When the cover plate 2 is screwed into the insulating shell 101, the threaded retaining ring 202 is embedded in the sealing gap 104, cooperating with the multiple sets of annular protrusions on the outer side of the multi-ring sealing gasket 108 fixed on the inner ring plate 103. The multiple sets of annular protrusions elastically press against the inner side of the threaded retaining ring 202, forming a multi-level sealing effect, thereby improving the stability of the sealing effect at the cover plate 2. Even if some sealing structures are slightly affected, other sealing layers can still function, effectively resisting the intrusion of external corrosive substances and extending the service life of the thermostat. Moreover, during disassembly and maintenance, the threads of the threaded retaining ring 202 are unscrewed, and the multi-ring sealing gasket 108 does not generate much resistance, thus not affecting the maintenance process.

[0033] The beveled bottom of the threaded retaining ring 202 facilitates smoother insertion between the sealing gap 104 and the multi-ring sealing gasket 108 during installation, reducing installation resistance. The outer edge of the annular protrusion on the multi-ring sealing gasket 108 features a sharp-angled design. When the threaded retaining ring 202 inserts, it causes the sharp angle of the annular protrusion to bend along the insertion direction. Under elastic compression, this further separates the spaces on the upper and lower sides of the annular protrusion, improving the isolation effect and enhancing the sealing performance.

[0034] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A mechanical explosion-proof temperature controller, comprising an explosion-proof body (1) and a cover plate (2), wherein the explosion-proof body (1) includes an insulating shell (101), an actuation control component (102) is disposed on the inner side of the insulating shell (101), a thread is disposed along the inner edge of the insulating shell (101), and a threaded retaining ring (202) is disposed at the bottom of the cover plate (2) that mates with the thread along the inner edge of the insulating shell (101), characterized in that, An inner ring plate (103) is provided along the inner edge of the insulating shell (101). A sealing gap (104) exists between the inner ring plate (103) and the inner edge of the insulating shell (101). A multi-ring sealing gasket (108) is fixedly provided on one side of the inner ring plate (103) located within the sealing gap (104). The surface of the multi-ring sealing gasket (108) has multiple sets of protrusions arranged longitudinally to abut against the inner side of the threaded retaining ring (202).

2. The mechanical explosion-proof temperature controller as described in claim 1, characterized in that, The insulating shell (101) is provided with an electrical cavity (105) and a fixed cavity (106). The execution control component (102) and the inner ring plate (103) are both located inside the electrical cavity (105). The electrical cavity (105) is provided with multiple sets of threaded holes for fixing the execution control component (102). The fixed cavity (106) is provided with studs at positions corresponding to the threaded holes. The threaded holes are not connected to the fixed cavity (106).

3. The mechanical explosion-proof temperature controller as described in claim 1, characterized in that, The annular protrusions on the multi-ring sealing gasket (108) have a triangular cross-section.

4. A mechanical explosion-proof temperature controller as described in claim 3, characterized in that, The inner side of the threaded retaining ring (202) is smoothly arranged.

5. A mechanical explosion-proof temperature controller as described in claim 2 or 4, characterized in that, A bracket (3) is provided on the side of the insulating shell (101) away from the cover plate (2). The bracket (3) includes a mounting base (301) connected to an external mounting component. A support plate (302) is fixedly provided on the mounting base (301). A fixing plate (303) that is detachably connected to the insulating shell (101) is fixedly provided on the support plate (302).

6. A mechanical explosion-proof temperature controller as described in claim 5, characterized in that, The shape of the fixing plate (303) matches the shape of the opening of the fixing cavity (106).

7. A mechanical explosion-proof temperature controller as described in claim 6, characterized in that, Multiple sets of fixing studs (107) that are bolted to the fixing plate (303) are fixedly installed inside the fixing cavity (106).

8. A mechanical explosion-proof temperature controller as described in claim 1, characterized in that, A sealing ring (201) is fitted on the upper side of the threaded retaining ring (202).

9. A mechanical explosion-proof temperature controller as described in claim 3, characterized in that, The bottom of the threaded retaining ring (202) is provided with a slope.

10. A mechanical explosion-proof temperature controller as described in claim 9, characterized in that, The multi-ring sealing gasket (108) is made of silicone.

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