Dust cover and gas delivery mechanism with pressure relief function

Abstract

The present application provides a dustproof cover and gas transmission mechanism with a pressure relief function, which relates to the field of dustproof technology. The dustproof cover with a pressure relief function includes a connecting cover body and a dustproof pressure relief structure, the connecting cover body is used to be installed at the interface of the pipe fitting; the dustproof pressure relief structure is installed on the connecting cover body, and the dustproof pressure relief structure has a first working state and a second working state that can be switched with each other. When in the first working state, the dustproof pressure relief structure blocks the interface; when in the second working state, the dustproof pressure relief structure opens the interface. Under the condition that the pressure inside the pipe fitting is lower than the threshold, the dustproof pressure relief structure remains in the first working state; under the condition that the pressure inside the pipe fitting exceeds the threshold, the dustproof pressure relief structure can automatically switch from the first working state to the second working state. The dustproof cover can adjust its own working state according to the air pressure state inside the pipe fitting, is not easy to fall off the pipe fitting, and has a good dustproof effect.

Description

Technical Field

[0001] The utility model relates to the technical field of dust prevention, in particular to a dustproof cover with pressure relief function and a gas transmission mechanism. Background Art

[0002] In the prior art, dust caps are provided at the ends of some pipe fittings to prevent dust from entering the interior of the pipe fittings. When the dust caps are installed at the interfaces of the pipe fittings, they also seal the interfaces, making it impossible to release pressure. However, during the production or transportation of some products, high temperatures and high pressures may be generated inside the products. At this time, the dust caps with a certain sealing effect may fall off the products due to the high temperature and high pressure inside the products, thereby losing the dustproof effect and failing to ensure the cleanliness inside the products. Utility Model Content

[0003] The utility model aims to provide a dust cover and a gas delivery mechanism with a pressure relief function, which can adjust their own working state according to the gas pressure state inside the pipe, are not easy to fall off the pipe, and have a good dustproof effect.

[0004] The embodiment of the utility model is achieved as follows:

[0005] In a first aspect, the utility model provides a dust cover with a pressure relief function, which is used in conjunction with a pipe fitting with an interface, comprising:

[0006] A connecting cover body and a dust-proof pressure relief structure, wherein the connecting cover body is used to be installed at the interface of the pipe fitting; the dust-proof pressure relief structure is installed on the connecting cover body, and the dust-proof pressure relief structure has a first working state and a second working state that can be switched to each other. When in the first working state, the dust-proof pressure relief structure blocks the interface; when in the second working state, the dust-proof pressure relief structure opens the interface;

[0007] When the pressure inside the pipe is lower than a threshold value, the dust-proof and pressure-relieving structure remains in the first working state; when the pressure inside the pipe exceeds a threshold value, the dust-proof and pressure-relieving structure can automatically switch from the first working state to the second working state.

[0008] In an optional embodiment, the connecting cover body includes a connected plate body and a ring body, one end of the ring body is located on a plate surface of the plate body, and the ring body cooperates with the cover body to define an assembly groove for plugging in the pipe fitting.

[0009] Based on the above scheme, the structure of the connecting cover body is simple, and the ring body is wrapped around the outside of the pipe fitting to achieve plug-in cooperation between the ring body and the pipe fitting. The two structures are firm, not easy to loosen, and have a long service life. When the air pressure in the pipe fitting does not exceed the threshold, the dust cover is not easy to fall off the pipe fitting through the cooperation of the ring body and the pipe fitting, thereby improving the dustproof effect.

[0010] In an optional embodiment, a vent hole connected to the ring body is provided on the plate body; when the dustproof and pressure relief structure is in the second working state, the dustproof and pressure relief structure is connected to the interface through the vent hole.

[0011] Based on the above scheme, when the air pressure inside the pipe increases, the air pressure inside the pipe can act on the dust-proof and pressure relief structure through the vent hole, thereby switching the dust-proof and pressure relief structure from the first working state to the second working state. The dust-proof and pressure relief structure can open the interface, and the gas in the pipe is discharged from the vent hole to relieve pressure, thereby avoiding excessive pressure directly acting on the dust cover, causing the dust cover to separate from the pipe.

[0012] In an optional embodiment, the vent hole is configured as a gradient hole, and the aperture of the port of the vent hole away from the dust-proof and pressure-relieving structure is larger than the aperture of the port close to the dust-proof and pressure-relieving structure.

[0013] Based on the above scheme, the vent hole is a gradient hole, and the aperture of the tube cavity of the connecting pipe of the vent hole is relatively large, which is conducive to entering the location of the dustproof and pressure relief structure through the vent hole, so that the response of the dustproof and pressure relief structure is more timely, the sensitivity is high, and the protection effect is good.

[0014] In an optional embodiment, the four sides of the plate body protrude beyond the four sides of the ring body in a radially outward direction of the ring body.

[0015] Based on the above solution, the plate body is surrounded by protruding ring bodies. When removing the dust cover, the operator can hold the flange position of the plate body, which is not easy to slip, saves time and effort, and is convenient for removal.

[0016] In an optional embodiment, the plate body and the ring body are configured as an integral structure.

[0017] Based on the above solution, the connecting cover body has a simple structure, high strength, long service life and is not easy to be damaged.

[0018] In an optional embodiment, the dustproof and pressure relief structure includes two sealing sheets that cooperate with each other, and the two sealing sheets are connected to the connecting cover body. The two sealing sheets have an angle so that the distance between the two sealing sheets gradually decreases in the direction from the connecting cover body to the sealing sheets; the two sealing sheets have a tendency to approach each other to maintain the first working state.

[0019] Based on the above scheme, the two sealing sheets have a tendency to approach each other, so that the two sealing sheets can be ensured to always be in the first working state, play the role of sealing the interface, and have a good dustproof effect when the pipe is used normally. When the pressure in the pipe increases and exceeds the threshold, under the action of air pressure, the gas enters between the two sealing sheets from the vent, and under the guidance of the two sealing sheets, the gas can quickly open the sealing sheets, so that the two sealing sheets move away from each other and open, thereby opening the interface and playing a role in pressure relief. When the two sealing sheets move away from each other, they have the force to restore the deformation, the pressure relief in the pipe is completed, the pressure is reduced, and the pressure is less than the force of the sealing sheet to restore the deformation. The sealing sheet can automatically move closer, thereby closing the interface again and playing a role in dustproof.

[0020] In an optional embodiment, the dust cover with pressure relief function further includes a limiter, and the limiter is used to limit the opening angle of the two sealing sheets.

[0021] Based on the above solution, by setting a limiter, the opening angle of the sealing sheet can be reasonably controlled to avoid the situation where the opening angle is too large and the sealing sheet is damaged, thereby improving the safety and reliability of the sealing sheet.

[0022] In an optional embodiment, the limiting member is configured as an annular structure and is sleeved outside the two sealing sheets, and the limiting member is fixed on the connecting cover body.

[0023] Based on the above solution, the structure of the limiter is simple, and the two sealing sheets can abut against the inner ring surface of the limiter when they are opened away from each other. The limiter is an annular structure with high strength, not easy to deform, and good limiting effect.

[0024] In a second aspect, the utility model provides a gas delivery mechanism, the gas delivery mechanism comprising:

[0025] A pipe fitting and a dust cover with a pressure relief function as described in any one of the aforementioned embodiments, wherein the pipe fitting is provided with an interface, the connecting cover body is connected to the pipe fitting, and the dustproof and pressure relief structure is used to open or close the interface.

[0026] The beneficial effects of the embodiments of the utility model are:

[0027] In summary, the dust cover with pressure relief function provided in this embodiment is installed at the interface of the pipe fitting. In the natural state, during the assembly or transportation of the pipe fitting, the pressure in the pipe fitting is small, and the pressure in the pipe fitting is less than the threshold value. The air pressure will not lift up the dust-proof pressure relief structure, and the dust-proof pressure relief structure can always remain in the first working state, thereby playing a role in sealing and dustproofing the interface. When the air pressure in the pipe fitting increases and is greater than the threshold value, under the action of the air pressure, the dust-proof pressure relief structure is pushed open, so that the dust-proof pressure relief structure switches from the first working state to the second working state, and the dust-proof pressure relief structure opens the interface, loses the sealing effect, and the gas can be discharged smoothly from the interface. When the gas is discharged, the air pressure in the pipe fitting is reduced. When it is less than the threshold value, the dust-proof pressure relief structure can automatically return to the first working state and play a role in sealing and dustproofing again. In this way, when the air pressure in the pipe fitting is greater than the threshold value, the air pressure in the pipe fitting can be automatically released, thereby reducing the external force directly acting on the connecting cover body to separate the connecting cover body from the pipe fitting, and the matching of the connecting cover body and the pipe fitting is reliable, not easy to loosen, and the dustproof effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of a first state of a dust cover with a pressure relief function according to an embodiment of the utility model;

[0030] Figure 2 It is a schematic diagram of the second state of the dust cover with pressure relief function according to an embodiment of the utility model.

[0031] icon:

[0032] 001- pipe fitting; 002- dust cover; 200- connecting cover body; 201- plate body; 202- ring body; 203- assembly groove; 204- vent hole; 220- dustproof pressure relief structure; 221- sealing sheet. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0037] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0038] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the prior art, when the pipe fitting 001 is being assembled or transported, the air pressure inside the pipe fitting 001 will increase, and the air pressure will directly act on the dust cover 002 installed at the interface of the pipe fitting 001. The dust cover 002 and the pipe fitting 001 are sealed together. Excessive air pressure will cause the dust cover 002 to directly detach from the pipe fitting 001, and the dust cover 002 will lose its dustproof effect.

[0040] In view of this, the designer provides a dust cover 002 with a pressure relief function, which can adjust the working state as needed, has the effect of pressure relief, reduces the external force directly acting on the connecting cover body 200 inside the pipe fitting 001, and the connecting cover body 200 is not easy to separate from the pipe fitting 001, and the dust prevention effect is good.

[0041] It should be noted that the dust cover 002 provided in this embodiment can be matched with the pipe fitting 001 such as a round tube or a square tube, without any specific limitation.

[0042] Please combine Figure 1 and Figure 2 In this embodiment, the dustproof cover 002 with pressure relief function includes a connecting cover body 200 and a dustproof pressure relief structure 220. The connecting cover body 200 is used to be installed at the interface of the pipe fitting 001; the dustproof pressure relief structure 220 is installed on the connecting cover body 200. The dustproof pressure relief structure 220 has a first working state and a second working state that can be switched to each other. When in the first working state, the dustproof pressure relief structure 220 blocks the interface; when in the second working state, the dustproof pressure relief structure 220 opens the interface.

[0043] When the pressure inside the pipe 001 is lower than the threshold, the dust-proof and pressure-relieving structure 220 remains in the first working state; when the pressure inside the pipe 001 exceeds the threshold, the dust-proof and pressure-relieving structure 220 can automatically switch from the first working state to the second working state.

[0044] Based on the above solution, the working mode of the dust cover 002 with pressure relief function provided in this embodiment is as follows:

[0045] The connecting cover 200 is installed at the interface of the pipe 001. In the natural state, during the assembly or transportation of the pipe 001, the pressure inside the pipe 001 is relatively small, and the pressure inside the pipe 001 is less than the threshold value. The air pressure will not lift up the dust-proof pressure relief structure 220, and the dust-proof pressure relief structure 220 can always remain in the first working state, thereby playing a role in sealing and dustproofing the interface. When the air pressure inside the pipe 001 increases and is greater than the threshold value, under the action of the air pressure, the dust-proof pressure relief structure 220 is pushed open, so that the dust-proof pressure relief structure 220 switches from the first working state to the second working state, and the dust-proof pressure relief structure 220 opens the interface and loses its sealing function, so that the gas can be discharged smoothly from the interface. When the gas is discharged, the air pressure inside the pipe 001 decreases. When it is less than the threshold value, the dust-proof pressure relief structure 220 can automatically return to the first working state and play a role in sealing and dustproofing again. In this way, when the air pressure in the pipe fitting 001 is greater than the threshold value, the air pressure in the pipe fitting 001 can be automatically released, thereby reducing the external force directly acting on the connecting cover body 200 to separate the connecting cover body 200 from the pipe fitting 001. The connecting cover body 200 and the pipe fitting 001 are firmly matched and not easy to loosen, and the dustproof effect is good.

[0046] The following embodiments illustrate the details of the dust cover 002 with pressure relief function provided by the present application by way of examples.

[0047] In this embodiment, optionally, the connection cover 200 includes a connected plate 201 and a ring 202, one end of the ring 202 is located on a plate surface of the plate 201, and the ring 202 cooperates with the cover to define an assembly groove 203 for plugging the pipe 001. The structure of the connection cover 200 is simple, and the ring 202 is wrapped outside the pipe 001 to achieve plug-in cooperation between the ring 202 and the pipe 001. The two structures are firm, not easy to loosen, and have a long service life. When the air pressure in the pipe 001 does not exceed the threshold, the dust cover 002 is not easy to fall off from the pipe 001 through the cooperation of the ring 202 and the pipe 001, thereby improving the dustproof effect.

[0048] It should be understood that the plate body 201 may be a circular plate, the ring body 202 may be a circular ring structure, and the plate body 201 and the ring body 202 may be configured as an integrated structure with high structural strength and long service life.

[0049] Optionally, the plate body 201 is provided with a vent hole 204 connected to the ring body 202, and the vent hole 204 can be arranged in the middle of the plate body 201, with a regular structure and convenient processing. When the dustproof pressure relief structure 220 is in the second working state, the dustproof pressure relief structure 220 is connected to the interface through the vent hole 204.

[0050] It should be noted that when the air pressure in the pipe fitting 001 increases, the air pressure in the pipe fitting 001 can act on the dust-proof and pressure relief structure 220 through the vent hole 204, thereby switching the dust-proof and pressure relief structure 220 from the first working state to the second working state. The dust-proof and pressure relief structure 220 can open the interface, and the gas in the pipe fitting 001 is discharged from the vent hole 204, thereby relieving pressure and avoiding excessive pressure directly acting on the dust cover 002, causing the dust cover 002 to separate from the pipe fitting 001.

[0051] Furthermore, the vent hole 204 is configured as a gradient hole, and the aperture of the port of the vent hole 204 away from the dustproof and pressure relief structure 220 is larger than the aperture of the port close to the dustproof and pressure relief structure 220 .

[0052] It is worth noting that the vent hole 204 is a gradient hole, and the aperture of the tube cavity of the connecting pipe 001 of the vent hole 204 is relatively large, which is conducive to entering the location of the dust-proof and pressure relief structure 220 through the vent hole 204, so that the response of the dust-proof and pressure relief structure 220 is more timely, the sensitivity is high, and the protection effect is good.

[0053] It should be understood that the cross-sectional profile of the vent hole 204 may be circular.

[0054] Furthermore, the plate body 201 protrudes from the edges of the ring body 202 in the radially outward direction of the ring body 202. The plate body 201 protrudes from the ring body 202, and when removing the dust cover 002, the operator can hold the flange of the plate body 201, which is not easy to slip, saving time and effort, and convenient for removal.

[0055] In this embodiment, optionally, the dustproof and pressure relief structure 220 includes two sealing sheets 221 that cooperate with each other, and the two sealing sheets 221 are both connected to the connecting cover body 200. The two sealing sheets 221 have an angle so that the distance between the two sealing sheets 221 gradually decreases in the direction from the connecting cover body 200 to the sealing sheets 221; the two sealing sheets 221 have a tendency to approach each other to maintain the first working state.

[0056] It should be understood that the two sealing sheets 221 have a tendency to approach each other, so that the two sealing sheets 221 can be ensured to always be in the first working state, play the role of sealing the interface, and have a good dustproof effect when the pipe 001 is used normally. When the pressure in the pipe 001 increases and exceeds the threshold, under the action of air pressure, the gas enters between the two sealing sheets 221 from the vent 204, and under the guidance of the two sealing sheets 221, the gas can quickly open the sealing sheets 221, so that the two sealing sheets 221 move away from each other and open, thereby opening the interface and playing a role of pressure relief. When the two sealing sheets 221 move away from each other, they have a force to restore the deformation, the pressure relief in the pipe 001 is completed, the pressure is reduced, and the pressure is less than the force of the sealing sheet 221 to restore the deformation. The sealing sheet 221 can automatically move closer, thereby closing the interface again and playing a role of dustproof.

[0057] It should be noted that the two sealing sheets 221 cooperate to form a duckbill structure, which can automatically open under the action of air pressure and automatically close when the air pressure decreases.

[0058] In other embodiments, the dust cover 002 with pressure relief function may further include a limiter (not shown), which is used to limit the opening angle of the two sealing sheets 221. By providing the limiter, the opening angle of the sealing sheet 221 can be reasonably controlled to avoid the situation where the sealing sheet 221 is damaged due to the excessive opening angle, thereby improving the safety and reliability of the use of the sealing sheet 221.

[0059] Optionally, the limiting member is set as an annular structure and is sleeved outside the two sealing sheets 221, and the limiting member is fixed on the connecting cover 200. The limiting member has a simple structure, and the two sealing sheets 221 can abut against the inner annular surface of the limiting member when they are opened away from each other. The limiting member is an annular structure with high strength, not easy to deform, and good limiting effect.

[0060] It should be understood that in other embodiments, the dust-proof and pressure-relieving structure 220 may also be in the form of flexible overlap, splicing, etc. in other shapes, or may be in the form of a piston, etc., which are not exhaustively listed in this embodiment.

[0061] The dust cover 002 with pressure relief function provided in this embodiment can automatically adjust the working state according to the air pressure, is not easy to separate from the pipe 001 when the air pressure is high, and has a good dustproof effect.

[0062] The utility model also provides a gas delivery mechanism, which includes a pipe 001 and a dust cover 002 with a pressure relief function of the above embodiment. The pipe 001 is provided with an interface, a connecting cover 200 is connected to the pipe 001, and a dustproof and pressure relief structure 220 is used to open or close the interface.

[0063] The gas delivery mechanism provided in this embodiment has at least the advantage of good dust prevention effect.

[0064] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A dust cover with a pressure relief function, used in conjunction with a pipe (001) with an interface, characterized in that: include: A connecting cover body (200) and a dustproof and pressure relief structure (220), wherein the connecting cover body (200) is used to be installed at the interface of the pipe fitting (001); the dustproof and pressure relief structure (220) is installed on the connecting cover body (200), and the dustproof and pressure relief structure (220) has a first working state and a second working state that can be switched to each other. When in the first working state, the dustproof and pressure relief structure (220) blocks the interface; when in the second working state, the dustproof and pressure relief structure (220) opens the interface; When the pressure in the pipe (001) is lower than a threshold value, the dust-proof and pressure-relieving structure (220) remains in the first working state; when the pressure in the pipe (001) exceeds a threshold value, the dust-proof and pressure-relieving structure (220) can automatically switch from the first working state to the second working state; The dustproof and pressure relief structure (220) comprises two sealing sheets (221) that cooperate with each other, the two sealing sheets (221) are both connected to the connecting cover body (200), and the two sealing sheets (221) have an angle so that the distance between the two sealing sheets (221) gradually decreases in the direction from the connecting cover body (200) to the sealing sheets (221); the two sealing sheets (221) have a tendency to approach each other so as to remain in the first working state.

2. The dust cover with pressure relief function according to claim 1, characterized in that: The connecting cover body (200) comprises a connected plate body (201) and a ring body (202), one end of the ring body (202) is located on a plate surface of the plate body (201), and the ring body (202) cooperates with the cover body to define an assembly groove (203) for plugging in the pipe fitting (001).

3. The dust cover with pressure relief function according to claim 2, characterized in that: The plate body (201) is provided with a vent hole (204) connected to the ring body (202); when the dustproof and pressure relief structure (220) is in the second working state, the dustproof and pressure relief structure (220) is connected to the interface through the vent hole (204).

4. The dust cover with pressure relief function according to claim 3, characterized in that: The vent hole (204) is configured as a gradient hole, and the aperture of the port of the vent hole (204) away from the dustproof and pressure relief structure (220) is larger than the aperture of the port close to the dustproof and pressure relief structure (220).

5. The dust cover with pressure relief function according to claim 2, characterized in that: The periphery of the plate body (201) protrudes beyond the periphery of the edge of the ring body (202) in the radial outward direction of the ring body (202).

6. The dust cover with pressure relief function according to claim 2, characterized in that: The plate body (201) and the ring body (202) are arranged as an integral structure.

7. The dust cover with pressure relief function according to claim 1, characterized in that: The dust cover with pressure relief function also includes a limiter, and the limiter is used to limit the opening angle of the two sealing sheets (221).

8. The dust cover with pressure relief function according to claim 7, characterized in that: The limiting member is configured as an annular structure and is sleeved outside the two sealing sheets (221); the limiting member is fixed on the connecting cover body (200).

9. A gas delivery mechanism, characterized in that: The gas transmission mechanism comprises: A pipe fitting (001) and a dust cover with a pressure relief function as described in any one of claims 1 to 8, wherein the pipe fitting (001) is provided with an interface, the connecting cover body (200) is connected to the pipe fitting (001), and the dustproof and pressure relief structure (220) is used to open or close the interface.

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