Exhaust port dustproof device and pressure balancing device with same

Abstract

The utility model relates to the technical field of dustproof devices, in particular to an exhaust port dustproof device and a pressure balancing device with the exhaust port dustproof device. The utility model provides an exhaust port dustproof device which comprises an exhaust port, a dustproof structure and a dustproof plate. The dustproof structure comprises a compression spring, a bearing ring and a connecting rod. And the other end of the compression spring is connected with the bottom end of the exhaust port. And a connecting rod is sleeved and fixed in the bearing ring. One end of the connecting rod close to the exhaust port is connected with a dustproof plate. And the dustproof plate is arranged below the exhaust port. The connecting rod is rotated so that the dustproof plate can be located at the first position, and the exhaust port is blocked by the dustproof plate. The pressure balancing device solves the problem that after the pressure balancing device is placed for a long time, dust enters the pressure balancing device along the exhaust port, and dust accumulation in the pressure balancing device is caused.

Description

Technical Field

[0001] The utility model relates to the technical field of dust-proof devices, in particular to a dust-proof device for an exhaust port and a pressure balance device with the same. Background Art

[0002] A refrigerated truck is an enclosed van used to transport frozen or fresh goods, and is commonly used to transport frozen foods, dairy products, fruits and vegetables, etc. However, during transportation, due to changes in the external environment, the pressure difference between the inside and outside of the box will be relatively large, and in severe cases, the box body will be deformed or even damaged. Therefore, a breathing valve is usually used to balance the pressure inside the box body.

[0003] When the existing pressure balance device leaves the factory, it needs to be arranged and placed. However, after being placed for a long time, dust will enter the inside along the exhaust port, resulting in the problem of dust accumulation inside the device.

[0004] Therefore, how to provide a dust-proof device for an exhaust port that will not cause dust to enter the inside along the exhaust port and cause dust accumulation inside after the pressure balance device is placed for a long time is a technical problem that needs to be solved urgently. Content of the Utility Model

[0005] The utility model provides a dust-proof device for an exhaust port, which solves the problem that after the pressure balance device is placed for a long time, dust will enter the inside along the exhaust port, resulting in dust accumulation inside.

[0006] The first aspect of the utility model lies in providing a dust-proof device for an exhaust port, including: an exhaust port, a dust-proof structure and a dust-proof plate;

[0007] The dust-proof structure includes a compression spring, a bearing ring and a connecting rod;

[0008] One end of the compression spring is connected with the bearing ring, and the other end is connected with the bottom end of the exhaust port;

[0009] The connecting rod is sleeved and fixed inside the bearing ring;

[0010] One end of the connecting rod close to the exhaust port is connected with a dust-proof plate;

[0011] The dust-proof plate is arranged below the exhaust port;

[0012] Rotate the connecting rod so that the dust-proof plate is in the first position, and the dust-proof plate blocks the exhaust port.

[0013] In some implementable ways, a rubber pad is arranged on the top surface of the dust-proof plate opposite to the exhaust port;

[0014] When the dust-proof plate is in the first position, the rubber pad is used to block the gap between the dust-proof plate and the exhaust port.

[0015] In some implementable ways, a groove is provided at the bottom end of the side of the exhaust port;

[0016] The opening end of the groove faces downward, and a compression spring is connected to the bottom wall of the groove.

[0017] In some implementable ways, a limiting frame with a "U" shape is provided in the direction of the opening end of the groove;

[0018] The two free ends of the limiting frame are respectively connected to the end faces of the opposite side walls of the groove;

[0019] The bearing ring can slide within the limiting frame to adjust the relative position between the dust-proof plate and the exhaust port.

[0020] In some implementable ways, there are two sets of dust-proof structures, which are respectively arranged at the bottom ends of both ends of the exhaust port relatively.

[0021] In some implementable ways, it further includes a support frame, a through hole, a limiting rod and a limiting groove;

[0022] The support frame is arranged on the dust-proof plate and on the side away from the exhaust port end, and the support frame is of an "L" shape;

[0023] The through hole is arranged on the support frame and is parallel to the dust-proof plate in direction;

[0024] The limiting rod is arranged in the through hole;

[0025] The limiting groove is arranged on the outer side wall of the exhaust port;

[0026] When the dust-proof plate is in the first position, the limiting rod passes through the through hole and at least partially embeds into the limiting groove to limit the support frame and the exhaust port.

[0027] In some implementable ways, it further includes a rubber seat;

[0028] The rubber seat is arranged at the inner corner of the support frame;

[0029] When the dust-proof plate is in the first position, the rubber seat abuts against the outer top corner of the exhaust port.

[0030] In some implementable ways, it further includes a rubber strip;

[0031] The rubber strip is arranged on the outer top corner of the exhaust port;

[0032] When the dust-proof plate is in the first position, the rubber strip abuts against the rubber seat.

[0033] In some implementable ways, it further includes a rubber ring;

[0034] The rubber ring is arranged around the through hole on the support frame and on the side wall close to the exhaust port. When the dust-proof plate is in the first position, the rubber ring is used to seal the gap between the support frame and the exhaust port.

[0035] The second aspect of the present invention is to provide a pressure balance device applied to the exhaust port dust-proof device. The pressure balance device includes a valve body, a suction port and an exhaust port dust-proof device;

[0036] The bottom end of the valve body is connected with a suction port, and one side of the valve body is connected with the exhaust port dust-proof device.

[0037] The beneficial effects of the present invention are as follows: First, rotate the connecting rod. The connecting rod rotates in the bearing ring, driving the dust-proof plate to rotate until the dust-proof plate is perpendicular to the exhaust direction of the exhaust port. Then, release the connecting rod. The bearing ring is subjected to the pulling force of the compression spring, and the bearing ring moves upward, driving the connecting rod upward. Thus, the dust-proof plate is forced to move upward to block the exhaust port. Through the above technical solution, the problem that after the pressure balance device is placed for a long time, dust will enter the interior along the exhaust port, resulting in dust accumulation inside, is solved. Description of the Drawings

[0038] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0039] Figure 1 It is a three-dimensional view of the first position of an exhaust port dust-proof device of the present invention;

[0040] Figure 2 It is a three-dimensional view of the second position of an exhaust port dust-proof device of the present invention;

[0041] Figure 3 It is a first-angle sectional three-dimensional view of an exhaust port dust-proof device of the present invention applied to a pressure balance device;

[0042] Figure 4 It is a second-angle sectional three-dimensional view of an exhaust port dust-proof device of the present invention applied to a pressure balance device;

[0043] Figure 5This is a three-dimensional view of a dust-proof device for the exhaust port of the present utility model applied to a pressure balance device.

[0044] Explanation of reference numerals:

[0045] 1. Exhaust port; 2. Dust-proof structure; 21. Compression spring; 22. Bearing ring; 23. Connecting rod; 3. Dust-proof plate; 4. Rubber pad; 5. Groove; 6. Limiting frame; 7. Support frame; 8. Through hole; 9. Limiting rod; 10. Limiting groove; 11. Rubber seat; 12. Rubber strip; 13. Rubber ring; 14. Suction port; 15. Valve body. Detailed implementation manners

[0046] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present utility model.

[0047] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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, and thus should not be construed as a limitation to the present utility model.

[0048] 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 indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, "a plurality" means two or more, such as two, three, etc., unless otherwise specifically defined. In addition, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0049] Refer to Figure 1, the first aspect of the present utility model is to provide a dust-proof device for an exhaust port, comprising: an exhaust port 1, a dust-proof structure 2, and a dust-proof plate 3.

[0050] Wherein, the dust-proof structure 2 includes a compression spring 21, a bearing ring 22, and a connecting rod 23. One end of the compression spring 21 is connected to the bearing ring 22, and the other end is connected to the bottom end of the exhaust port 1. The connecting rod 23 is sleeved and fixed inside the bearing ring 22. One end of the connecting rod 23 close to the exhaust port 1 is connected to the dust-proof plate 3. The dust-proof plate 3 is arranged below the exhaust port 1. Rotate the connecting rod 23 to make the dust-proof plate 3 in the first position, and the dust-proof plate 3 blocks the exhaust port 1.

[0051] Specifically, first, rotate the connecting rod 23. The connecting rod 23 rotates in the bearing ring 22, driving the dust-proof plate 3 to rotate until the dust-proof plate 3 is perpendicular to the exhaust direction of the exhaust port 1. Then, release the connecting rod 23. The bearing ring 22 is subjected to the pulling force of the compression spring 21, and the bearing ring 22 moves upward, driving the connecting rod 23 upward. Thus, the dust-proof plate 3 is forced to move upward. Without external interference, the pulling force of the compression spring 21 makes the dust-proof plate 3 in the first position, blocking the exhaust port 1. So as to achieve the dust-proof effect.

[0052] Preferably, there are two sets of dust-proof structures 2, which are respectively arranged at the bottom ends of both ends of the exhaust port 1 relatively. The two connecting rods 23 in the two sets of dust-proof structures 2 are respectively connected to both ends of the dust-proof plate 3 relatively, which is convenient for adjusting the relative position between the dust-proof plate 3 and the exhaust port 1. And when the dust-proof plate 3 is in the first position, the dust-proof plate 3 is in closer contact with the exhaust port 1, and the dust-proof effect is better.

[0053] It should be noted that the first position of the dust-proof plate 3 is the position when the dust-proof plate 3 blocks the exhaust port 1.

[0054] In an implementable way, a rubber pad 4 is arranged on the top surface of the dust-proof plate 3 opposite to the exhaust port 1. When the dust-proof plate 3 is in the first position, the rubber pad 4 is used to block the gap between the dust-proof plate 3 and the exhaust port 1. When the dust-proof plate 3 blocks the exhaust port 1, there may be a gap between the dust-proof plate 3 and the exhaust port 1. A rubber pad 4 is arranged on the top surface of the dust-proof plate 3 opposite to the exhaust port 1. Preferably, the size of the rubber pad 4 is the same as the size of the exhaust port 1. The combined use of the dust-proof plate 3 and the rubber pad 4 plays a better role in blocking the exhaust port 1.

[0055] In an implementable way, a groove 5 is opened at the bottom end of the side of the exhaust port 1. The opening end of the groove 5 faces downward, and the bottom wall of the groove 5 is connected to the compression spring 21. Wherein, at least part of the compression spring 21 is arranged in the groove 5. Preferably, the compression spring 21 is entirely placed in the groove 5 in the initial state. The compression spring 21 utilizes the space at the bottom end of the side of the exhaust port 1, making the connection between the dust-proof structure 2 and the exhaust port 1 more compact and reducing the occupied space.

[0056] In an implementable manner, a limiting frame 6 with a "U" - shaped structure is arranged in the direction of the opening end of the groove 5; the two free ends of the limiting frame 6 are respectively connected to the end faces of the opposite side walls of the groove 5. The bearing ring 22 can slide within the limiting frame 6 to adjust the relative position between the dust - proof plate 3 and the exhaust port 1. When the bearing ring 22 slides within the limiting frame 6, the movement track of the bearing ring 22 provides a rough positioning, facilitating the adjustment of the relative position between the dust - proof plate 3 and the exhaust port 1.

[0057] In an implementable manner, as Figure 2 shown, the exhaust - port dust - proof device further includes a support frame 7, a through - hole 8, a limiting rod 9, and a limiting groove 10. The support frame 7 is arranged on the dust - proof plate 3 and on the side surface away from the exhaust port 1. The support frame 7 has an "L" - shaped structure. The through - hole 8 is arranged on the support frame 7 and is parallel to the dust - proof plate 3 in direction. The limiting rod 9 is arranged in the through - hole 8. The limiting groove 10 is arranged on the outer side wall of the exhaust port 1. When the dust - proof plate 3 is in the first position, the limiting rod 9 passes through the through - hole 8 and at least partially embeds into the limiting groove 10 to limit the support frame 7 and the exhaust port 1.

[0058] Specifically, when the dust - proof plate 3 is in the first position, the limiting rod 9 passes through the through - hole 8 and at least partially embeds into the limiting groove 10, fixing the support frame 7 on the side wall of the exhaust port 1.

[0059] For example, when the exhaust - port dust - proof device is applied to a pressure - balancing device and is arranged on the side wall of the carriage, when the truck encounters a bumpy road during travel, the bumps on the road are likely to cause the vibration of the carriage, driving the compression spring 21 to vibrate, resulting in the non - tight contact between the dust - proof plate 3 and the exhaust port 1, and the dust - proof effect is affected. Therefore, after the limiting rod 9 passes through the through - hole 8 and at least partially embeds into the limiting groove 10, fixing the support frame 7 on the side wall of the exhaust port 1, the contact between the dust - proof plate 3 and the exhaust port 1 is tighter, reducing the gap between the dust - proof plate 3 and the exhaust port 1 and increasing the dust - proof effect.

[0060] Preferably, the limiting rod 9 is a screw rod, the through - hole 8 is a threaded hole, and the screw rod is fixed in the threaded hole by screwing. A nut is arranged at the outer end of the screw rod, and rotating the nut drives the screw rod to rotate so as to screw the screw rod into or out of the threaded hole.

[0061] Preferably, a rubber ring 13 is arranged around the through - hole 8 on the support frame 7 and on the side wall close to the exhaust port 1. When the dust - proof plate 3 is in the first position, the rubber ring 13 is used to seal the gap between the support frame 7 and the exhaust port 1.

[0062] In one implementable way, the dust-proof device for the exhaust port further includes a rubber seat 11. The rubber seat 11 is arranged at the inner corner of the support frame 7. When the dust-proof plate 3 is in the first position, the rubber seat 11 abuts against the outer top corner of the exhaust port 1. The rubber seat 11 at the inner corner of the support frame 7 abuts against the outer top corner of the exhaust port 1, reducing the gap between the dust-proof plate 3 and the exhaust port 1 and enhancing the dust-proof effect.

[0063] Preferably, a rubber strip 12 is arranged at the outer top corner of the exhaust port 1. When the dust-proof plate 3 is in the first position, the rubber seat 11 at the inner corner of the support frame 7 abuts against the rubber strip 12 at the outer top corner of the exhaust port 1, reducing the gap between the dust-proof plate 3 and the exhaust port 1 and enhancing the dust-proof effect.

[0064] It should be noted that the rubber ring 13, the rubber seat 11 and the rubber strip 12 mentioned above are all made of conventional rubber materials, and the present application does not limit them.

[0065] As Figure 3 、 Figure 4 and Figure 5 shown, the second aspect of the present utility model lies in providing a pressure balance device, which is applied to the dust-proof device for the exhaust port. The pressure balance device includes a valve body 15, a suction port 14 and a dust-proof device for the exhaust port.

[0066] The bottom end of the valve body 15 is connected with a suction port 14, and one side of the valve body 15 is connected with a dust-proof device for the exhaust port.

[0067] It should be noted that limit concave teeth can be provided at the bottom end of the side of the air outlet to increase the acting force when the limiting plate abuts against the air outlet, making the two abut more firmly.

[0068] Preferably, the set depth of the limit concave teeth is one-fourth of the total thickness of the dust-proof plate 3 and the rubber pad 4.

[0069] In the above-mentioned implementation manner, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0070] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0071] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or mode are included in at least one embodiment or mode of the embodiments of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or modes. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or modes described in this specification and the features of different embodiments or modes.

[0072] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, 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 or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. An exhaust port dust-proof device, characterized in that, Comprising: An exhaust port, a dust-proof structure and a dust-proof plate; The dust-proof structure includes a compression spring, a bearing ring and a connecting rod; One end of the compression spring is connected to the bearing ring, and the other end is connected to the bottom end of the exhaust port; The connecting rod is sleeved and fixed inside the bearing ring; One end of the connecting rod close to the exhaust port is connected to the dust-proof plate; The dust-proof plate is arranged below the exhaust port; Rotate the connecting rod to make the dust-proof plate in the first position, and the dust-proof plate blocks the exhaust port.

2. The dust-proof device for the exhaust port according to claim 1, wherein A rubber pad is arranged on the top surface of the dust-proof plate opposite to the exhaust port; When the dust-proof plate is in the first position, the rubber pad is used to block the gap between the dust-proof plate and the exhaust port.

3. The dust-proof device for the exhaust port according to claim 1, characterized in that, A groove is opened at the bottom end of the side of the exhaust port; The opening end of the groove faces downward, and the bottom wall of the groove is connected to the compression spring.

4. The dust-proof device for the exhaust port according to claim 3, wherein A limiting frame with a "U" shape is arranged in the direction of the opening end of the groove; The two free ends of the limiting frame are respectively connected to the end faces of the opposite side walls of the groove; The bearing ring can slide in the limiting frame so as to adjust the relative position between the dust-proof plate and the exhaust port.

5. The dust-proof device for the exhaust port according to claim 1, wherein There are two sets of the dust-proof structures, which are respectively arranged at the bottom ends of both ends of the exhaust port relatively.

6. The dust-proof device for the exhaust port according to claim 1, wherein It further includes a support frame, a through hole, a limiting rod and a limiting groove; The support frame is arranged on the dust-proof plate and on the side surface far from the exhaust port end, and the support frame is of an "L" shape; The through hole is arranged on the support frame, and the direction is parallel to the dust-proof plate; The limiting rod is arranged in the through hole; The limiting groove is arranged on the outer side wall of the exhaust port; When the dust-proof plate is in the first position, the limiting rod passes through the through hole and at least partially embeds into the limiting groove so as to limit the support frame and the exhaust port.

7. The dust-proof device for the exhaust port according to claim 6, wherein, It further includes a rubber seat; The rubber seat is arranged at the inner corner of the support frame; When the dust-proof plate is in the first position, the rubber seat abuts against the outer top corner of the exhaust port.

8. The dust-proof device for the exhaust port according to claim 7, wherein It further includes a rubber strip; The rubber strip is arranged on the outer top corner of the exhaust port; When the dust-proof plate is in the first position, the rubber strip abuts against the rubber seat.

9. The dust-proof device for the exhaust port according to claim 6, characterized in that It further includes a rubber ring; The rubber ring is arranged around the through hole on the support frame and on the side wall close to the exhaust port. When the dust-proof plate is in the first position, the rubber ring is used to seal the gap between the support frame and the exhaust port.

10. A pressure balance device, characterized in that, Applied to the exhaust port dust-proof device described in any one of claims 1-9, the pressure balance device includes a valve body, an air inlet and an exhaust port dust-proof device; The bottom end of the valve body is connected to the air inlet, and one side of the valve body is connected to the exhaust port dust-proof device.

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