Exhaust device and control cabinet using same

Abstract

The utility model relates to the technical field of control cabinets, and discloses an exhaust device which comprises a valve body and a valve cover which are detachably connected, a valve cavity is formed between the valve body and the valve cover, an air inlet hole is formed in the bottom of the valve body, an exhaust hole is formed in the top of the valve cover, a valve plate is placed in the valve body, a cylinder is arranged in the middle of one face of the valve plate, and a blind hole is formed in the end face of the cylinder. The middle of the valve deck is in threaded connection with an adjusting rod, one end of the adjusting rod is fixedly connected with a knob, the other end of the adjusting rod is connected with a spring, the spring extends into the blind hole of the cylinder and does not make contact with the bottom of the blind hole, and the spring is in zero-clearance or clearance fit with the blind hole of the cylinder. The exhaust device solves the problems that in the prior art, the take-off pressure of an exhaust device is high, and exhaust under the micro-positive pressure working condition cannot be met. The utility model further provides a control cabinet using the exhaust device.

Description

Technical Field

[0001] The utility model relates to the technical field of control cabinets, in particular to an exhaust device and a control cabinet using the device. Background Art

[0002] At present, the main methods of cooling and dehumidifying control cabinets include natural ventilation, forced ventilation, cabinet air conditioning, compressed air cooling, etc. Among them, compressed air cooling is widely used because of its rapid cooling effect and the ability to prevent the generation of condensed water.

[0003] However, when compressed air is introduced into the control cabinet through a pipe for cooling, since the entire control cabinet is basically a nearly closed structure, the interior of the control cabinet is under a slightly positive pressure, and the existing exhaust devices on the market usually have a starting pressure of ≥0.15Mpa, causing some high-temperature gas to be retained inside the control cabinet and unable to be discharged in a timely and effective manner, thereby affecting the cooling effect inside the cabinet.

[0004] Therefore, it is necessary to provide an exhaust device with a low starting pressure to meet the actual needs of the control cabinet when using compressed air cooling method. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide an exhaust device to solve the problem that the existing exhaust devices in the prior art have a high starting pressure and cannot meet the exhaust requirements under micro-positive pressure conditions.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] In the first aspect, the utility model provides an exhaust device, comprising a valve body and a valve cover that are detachably connected, a valve cavity is formed between the valve body and the valve cover, an air inlet hole is opened at the bottom of the valve body, an exhaust hole is opened at the top of the valve cover, a valve plate is placed in the valve body, a cylinder is opened in the middle of one side of the valve plate, a blind hole is opened on the end face of the cylinder, an adjusting rod is threadedly connected to the middle part of the valve cover, a knob is fixedly connected to one end of the adjusting rod, and a spring is connected to the other end, the spring extends into the blind hole of the cylinder and does not contact the bottom of the blind hole, and the spring and the blind hole of the cylinder have zero clearance or clearance fit.

[0008] Furthermore, the valve plate is made of carbon fiber composite material.

[0009] Furthermore, the sealing surface of the valve plate is circular, and an annular gap is formed between the valve plate and the side wall of the valve body. The annular gap ensures smooth passage of airflow.

[0010] Furthermore, a sealing ring is provided on the contact surface between the bottom of the valve body and the valve plate, and the sealing ring is used to enhance the sealing performance of the valve plate.

[0011] Furthermore, the valve body and the valve cover are both of a rotating body shell structure, and the cylindrical outer surface of the valve body is provided with an external thread, which facilitates the installation and disassembly of the exhaust device.

[0012] Furthermore, the air inlet and the air outlet are multiple waist-shaped grooves evenly distributed along the circumference, thereby ensuring the air inlet and exhaust efficiency.

[0013] In a second aspect, the utility model further provides a control cabinet, including a cabinet body, using any of the exhaust devices described above, at least one exhaust device being arranged on the top of the cabinet body.

[0014] Furthermore, the cabinet is provided with an air inlet for communicating with an external compressed air source.

[0015] Beneficial effects of the utility model:

[0016] 1. The utility model sets a cylinder on the valve plate of carbon fiber composite material, and the spring extends into the cylinder without contacting the bottom of the cylinder. At the same time, the spring and the cylinder are matched with zero gap or gap, so that the valve plate can jump or fall in the vertical direction under the guidance of the spring and the cylinder. The pressurized gas only needs to overcome the dead weight of the valve plate to open the exhaust device. Compared with the existing exhaust device, its starting pressure is low, which meets the need for exhaust under micro-positive pressure conditions. In addition, the material of the valve plate is carbon fiber composite material. Compared with the conventional valve plate or valve core structure, the ultra-thin carbon fiber composite valve plate has a higher structural strength and a very low weight, so that the exhaust device of the utility model has a very low starting pressure and can discharge the gas in the closed cavity to the greatest extent.

[0017] 2. The utility model provides an adjusting rod, which can be turned by a knob to adjust the position height of the spring. When the spring is separated from the valve plate, the valve plate only needs to overcome its own weight to start. At this time, the starting pressure is extremely low, which can discharge the high-temperature gas in the control cabinet to the greatest extent, solving the problem of exhaust under the micro-positive pressure condition of the control cabinet. When the spring abuts against the valve plate, a larger starting pressure can be preset, thereby improving the application range of the exhaust device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the exhaust device of the utility model;

[0019] Figure 2 It is a top view of the exhaust device of the utility model;

[0020] Figure 3 yes Figure 2 Middle AA section view;

[0021] Figure 4 It is a schematic diagram of the control cabinet of the utility model.

[0022] Among them, 1-valve body, 11-air inlet, 12-sealing ring, 13-external thread, 2-valve cover, 21-exhaust hole, 22-adjusting rod, 23-knob, 24-spring, 3-valve plate, 31-cylinder, 4-cabinet, 41-air inlet. DETAILED DESCRIPTION

[0023] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the figures may be omitted.

[0024] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the figures, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] Embodiment 1,

[0026] like Figure 1-Figure 3 As shown, this embodiment is an exhaust device, such as Figure 1 As shown, it includes a detachably connected valve body 1 and a valve cover 2, a valve cavity is formed between the valve body 1 and the valve cover 2, the valve body 1 and the valve cover 2 are both rotary shell structures, and the cylindrical outer surface of the valve body 1 is provided with an external thread 13 to facilitate the installation and disassembly of the exhaust device.

[0027] like Figure 3 As shown, the bottom of the valve body 1 is provided with an air inlet 11, which is used to communicate with an external pressurized gas sealed cavity or other external gas source, and the top of the valve cover 2 is provided with an exhaust hole 21, as shown in FIG. Figure 2As shown, the air inlet 11 and the air outlet 21 are multiple waist-shaped grooves uniformly distributed along the circumferential direction to ensure the efficiency of air intake and exhaust; a valve plate 3 is placed in the valve body 1, and the sealing surface of the valve plate 3 is circular. An annular gap is formed between the valve plate 3 and the side wall of the valve body 1, and the annular gap ensures smooth exhaust; a cylinder 31 is provided in the middle of the other side of the valve plate 3, and a blind hole is provided on the top end face of the cylinder 31. An adjusting rod 22 is threadedly connected to the middle part of the valve cover 2, and a knob 23 is fixedly connected to one end of the adjusting rod 22, and a spring 24 is connected to the other end. The other end of the spring 24 extends into the blind hole of the cylinder 31 and does not contact the bottom of the blind hole. The distance between the two is the initial jump height of the valve plate 3. When the valve plate 3 reaches the initial jump height, the valve plate 3 abuts against the spring 24. Under the elastic force of the spring 24, the valve plate 3 quickly reaches the maximum jump height, so that the inside of the valve body 1 and the side with pressurized gas are balanced.

[0028] In this embodiment, the spring 24 and the blind hole of the cylinder 31 have zero gap or gap matching, so that the valve plate 3 can jump up or fall down in the vertical direction under the guidance of the matching of the spring 24 and the blind hole of the cylinder 31. The material of the valve plate 3 is carbon fiber composite material. Compared with the conventional metal valve core, the ultra-thin carbon fiber composite valve plate has higher structural strength and extremely low weight, so that the exhaust device of the utility model has extremely low starting pressure and can discharge the gas in the closed cavity to the greatest extent. A sealing ring 12 is provided on the contact surface between the bottom of the valve body 1 and the valve plate 3 to enhance the sealing performance of the valve plate.

[0029] By turning the adjusting rod 22 with the knob 23, the position height of the spring 24 can be adjusted. When the spring 24 is separated from the valve plate 3, the valve plate 3 only needs to overcome its own weight to jump out. At this time, the jumping pressure is extremely low. When the spring 24 abuts against the valve plate 3, a larger jumping pressure can be preset, thereby improving the application range of the exhaust device.

[0030] The working principle of the exhaust device of the present invention is as follows: pressurized gas enters the valve body 1 from the air inlet 11. Since the valve plate 3 has a small weight, the gas can easily push the valve plate 3 upward, open the exhaust device, and the gas enters the valve cavity along the annular gap between the valve plate 3 and the valve body 1, and is discharged from the exhaust hole 21 on the valve cover 2.

[0031] During this process, the starting pressure of the exhaust device can be adjusted to suit different application scenarios. When the spring 24 is separated from the valve plate 3, the starting pressure of the valve plate 3 only needs to overcome the deadweight of the valve plate 3. At this time, the starting pressure is extremely low. When the spring 24 abuts against the valve plate 3, a larger starting pressure can be preset, thereby improving the application range of the exhaust device.

[0032] Embodiment 2,

[0033] like Figure 4As shown, this embodiment is a control cabinet, including a cabinet body 4, using two exhaust devices of the above-mentioned embodiment 1, both exhaust devices are arranged on the top of the cabinet body 4, and the cabinet body 4 is provided with an air inlet 41 connected to an external compressed air source, and the cabinet body 4 is provided with an air inlet pipe connected to the air inlet 41, and the outlet of the air inlet pipe is arranged at the bottom of the cabinet body 4 or near the bottom.

[0034] The working principle of the control cabinet of the utility model is as follows: externally cooled and dried compressed air enters the cabinet body 4 along the air inlet 41 and the compressed air is quickly discharged from the exhaust device, taking away the heat inside the control cabinet, thereby achieving effective cooling of the control cabinet.

[0035] When the air intake is completed, the air pressure inside the control cabinet is still relatively high. The exhaust device of the utility model can adjust the starting pressure of the valve plate 3 to a very low level, that is, it only needs to overcome the dead weight of the valve plate 3. Therefore, it can still continue to discharge the high-temperature gas that may be retained inside the control cabinet until the air pressure inside the control cabinet is insufficient to lift the valve plate 3. The valve plate 3 falls back to the bottom of the valve body 1 by its own weight to achieve sealing, thereby achieving the purpose of dust and moisture proofing of the control cabinet.

[0036] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model. The technology, shape, and structure that are not described in detail in the utility model are all well-known technologies.

Claims

1. An exhaust device, comprising a detachably connected valve body (1) and a valve cover (2), wherein a valve cavity is formed between the valve body (1) and the valve cover (2), an air inlet hole (11) is provided at the bottom of the valve body (1), and an exhaust hole (21) is provided at the top of the valve cover (2), characterized in that: A valve plate (3) is placed in the valve body (1), a cylinder (31) is provided in the middle of one side of the valve plate (3), a blind hole is opened on the end face of the cylinder (31), an adjusting rod (22) is threadedly connected to the middle of the valve cover (2), one end of the adjusting rod (22) is fixedly connected to a knob (23), and the other end is connected to a spring (24), the spring (24) extends into the blind hole of the cylinder (31) and does not contact the bottom of the blind hole, and the spring (24) and the blind hole of the cylinder (31) are zero-clearance or clearance-matched.

2. The exhaust device according to claim 1, characterized in that: The material of the valve plate (3) is a carbon fiber composite material.

3. The exhaust device according to claim 1, characterized in that: The sealing surface of the valve plate (3) is circular, and an annular gap is formed between the valve plate (3) and the side wall of the valve body (1).

4. The exhaust device according to claim 1, characterized in that: A sealing ring (12) is provided on the contact surface between the bottom of the valve body (1) and the valve plate (3).

5. The exhaust device according to claim 1, characterized in that: The valve body (1) and the valve cover (2) are both rotary shell structures, and the cylindrical outer surface of the valve body (1) is provided with an external thread (13).

6. The exhaust device according to claim 1, characterized in that: The air inlet holes (11) and the air outlet holes (21) are both a plurality of waist-shaped grooves evenly distributed along the circumferential direction.

7. A control cabinet, comprising a cabinet body (4), characterized in that: Using the exhaust device according to any one of claims 1 to 6, at least one of the exhaust devices is arranged on the top of the cabinet (4).

8. The control cabinet according to claim 7, characterized in that: The cabinet (4) is provided with an air inlet (41) for communicating with an external compressed air source.

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