Urea box cover, urea box and power device

Abstract

The utility model discloses a urea box cover, a urea box and a power device, the urea box cover comprises an outer cover, an inner cover and a ventilation piece, and the outer cover is arranged on the outer side of the inner cover in a sleeving mode. The ventilation piece is of an elastic structure, the inner cover is located on the outer side of the ventilation piece, the ventilation piece is installed at the top end of the inner cover, the bottom end of the ventilation piece is of an arc-shaped structure protruding downwards, and ventilation holes are formed in the arc-shaped structure; when the air pressure of the first cavity between the outer cover and the inner cover is smaller than or equal to that of the second cavity in the inner cover, the vent hole is naturally closed; and when the air pressure of the first chamber is greater than that of the second chamber, the vent hole is opened. The ventilation piece is of an elastic structure, so that when the air pressure of a first cavity between the outer cover and the inner cover is smaller than or equal to that of a second cavity in the inner cover, the ventilation hole is naturally closed. And when the air pressure of the first chamber is greater than that of the second chamber, the vent hole is opened to maintain internal and external pressure balance, so that the usability of the urea box is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of urea tanks, in particular to a urea tank cover, a urea tank and a power device. Background Art

[0002] The urea tank is used for exhaust emissions, and the urea tank cover is mainly used to seal the filling port to prevent impurities from entering the tank and urea from overflowing from the tank. In order to achieve internal and external air pressure balance during the use of the urea tank, a waterproof and breathable membrane is added to the urea tank cover.

[0003] Considering the vulnerability of the waterproof and breathable membrane, a support structure is added, connecting the small holes to the interior of the urea tank. However, in some situations (such as bumpy roads, fluctuating urea levels, and splashing), urea may enter the small holes, forming crystals and causing them to become clogged. This renders the urea tank cover incapable of ventilation, making it impossible to balance the internal and external pressures. Consequently, the internal pressure is low, and the urea pump cannot extract urea smoothly, causing the vehicle's emissions to fail to meet regulatory requirements.

[0004] Therefore, how to improve the performance of the urea tank is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] The purpose of the utility model is to provide a urea tank cover, a urea tank and a power device, and the use performance of the urea tank is improved.

[0006] The urea tank cover provided in this application includes:

[0007] outer cover;

[0008] An inner cover, wherein the outer cover is sleeved on the outer side of the inner cover;

[0009] The vent is an elastic structure, the inner cover is located outside the vent, the vent is installed on the top of the inner cover, and the outer periphery of the vent is provided with a guide surface for fluid dripping, and the vent is provided with a vent hole; when the air pressure of the first chamber between the outer cover and the inner cover is less than or equal to the air pressure of the second chamber in the inner cover, the vent is naturally closed; when the air pressure of the first chamber is greater than the air pressure of the second chamber, the vent is opened, and the first chamber and the second chamber are connected.

[0010] Optionally, in the above-mentioned urea tank cover, the bottom end of the vent member is a downwardly protruding arc-shaped structure, and the vent hole is provided in the arc-shaped structure.

[0011] Optionally, in the above-mentioned urea tank cover, the vent is a rubber structure;

[0012] And / or, the ventilator is an integrally formed structure;

[0013] And / or, the outer surface of the arc-shaped structure is a hemispherical structure, and the arc-shaped structure is convex downward.

[0014] Optionally, in the above-mentioned urea tank cover, the vent member includes:

[0015] A support portion, the support portion is an annular structure, the outer periphery of the support portion is connected to the support plate at the top end of the inner cover;

[0016] A one-way check portion, wherein the arc-shaped structure is formed on the one-way check portion, and the top end of the one-way check portion is sealed and connected with the outer periphery of the support portion.

[0017] Optionally, in the above urea tank cover, the support portion includes:

[0018] an intermediate connecting member, wherein the thickness of the intermediate connecting member is greater than or equal to the thickness of the support plate at the top end of the inner cover, and the intermediate connecting member is an annular member;

[0019] a first clamping member connected to a top end of the intermediate connecting member and clamped to an upper surface of the support plate;

[0020] A second clamping member is connected to the bottom end of the intermediate connecting member and is clamped to the lower surface of the support plate.

[0021] Optionally, in the above-mentioned urea tank cover, the vent hole is a strip-shaped hole body, and the middle position of the strip-shaped hole body is located at the bottom end of the one-way check portion, and both ends extend to the bottom end of the second clamping member.

[0022] Optionally, in the urea tank cover:

[0023] At least two of the vents are mounted on the inner cover;

[0024] And / or, the vents are evenly distributed circumferentially with the center of the inner cover as the center.

[0025] Optionally, the urea tank cover further includes a urea shielding component, and the urea shielding component includes:

[0026] A connecting ring, the connecting ring being annular, the top end of the connecting ring being connected to the lower surface of the top support plate of the inner cover, and the vent member being located in a space formed on the inner periphery of the connecting ring;

[0027] A baffle is installed on the connecting ring and is located below the ventilator; at least two baffles are provided from top to bottom; the baffle includes a baffle portion and a ventilator portion; when projected from top to bottom, two adjacent baffles are isolated and arranged by the ventilator portion.

[0028] Optionally, in the urea tank cover:

[0029] The baffle portion and the vent portion of the baffle are both arranged in a semicircular shape;

[0030] Alternatively, a plurality of the flow blocking portions and the vent portions are provided, and two adjacent flow blocking portions are spaced apart by the vent portion.

[0031] A urea tank comprises a urea tank body and a urea tank cover installed on the top of the urea tank body, wherein the urea tank cover is any one of the urea tank covers described above.

[0032] A power device includes a urea tank cover, wherein the urea tank cover is any one of the urea tank covers described above.

[0033] In the above technical solution, the urea tank cover provided by the present invention includes an outer cover, an inner cover, and a vent. The outer cover is sleeved on the outside of the inner cover. The vent is a resilient structure. The inner cover is located outside the vent, which is mounted on the top of the inner cover. The vent is provided with a guide surface for fluid dripping on its periphery and a vent hole. When the air pressure in the first chamber between the outer and inner covers is less than or equal to the air pressure in the second chamber of the inner cover, the vent hole naturally closes. When the air pressure in the first chamber exceeds the air pressure in the second chamber, the vent hole opens.

[0034] As can be seen from the above description, the urea tank cover provided in this application is equipped with a vent and a guide surface to reduce urea accumulation on the vent. The vent is an elastic structure, so when the air pressure in the first chamber between the outer and inner covers is less than or equal to the air pressure in the second chamber within the inner cover, the vent naturally closes. When the air pressure in the first chamber exceeds the air pressure in the second chamber, the vent opens, maintaining internal and external pressure balance. If urea in the urea tank splashes onto the vent due to vibration or turbulence, the vent remains closed, preventing urea leakage and thereby improving the performance of the urea tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0036] Figure 1 A schematic structural diagram of a urea tank cover provided by an embodiment of the present utility model;

[0037] Figure 2 A front view of a ventilator provided in an embodiment of the present utility model;

[0038] Figure 3A top view of the ventilator provided in an embodiment of the present utility model;

[0039] Figure 4 A bottom view of the ventilator provided in an embodiment of the present utility model;

[0040] Figure 5 A schematic diagram of a baffle structure provided by an embodiment of the utility model;

[0041] Figure 6 A schematic structural diagram of another baffle provided by an embodiment of the present utility model;

[0042] Figure 7 This is a schematic diagram of the arrangement position of the ventilator provided in an embodiment of the present utility model.

[0043] in Figure 1-7 middle:

[0044] 100-inner cover, 101-support plate;

[0045] 200-ventilator, 201-one-way check portion, 202-vent hole, 203-intermediate connector, 204-first clamping member, 205-second clamping member;

[0046] 300-outer cover;

[0047] 400- baffle, 401- baffle, 402- vent;

[0048] 500-Connecting ring. DETAILED DESCRIPTION

[0049] The core of the utility model is to provide a urea tank cover, a urea tank and a power device, and the use performance of the urea tank is improved.

[0050] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and implementation methods.

[0051] Please refer to Figures 1 to 7 .

[0052] like Figure 1 As shown, in one embodiment, the urea tank cover provided by the present invention includes an outer cover 300, an inner cover 100, and a vent 200. The outer cover 300 is sleeved on the outer side of the inner cover 100. Specifically, the structure of the outer cover 300 can be the same as that of a conventional outer cover. The vent is provided with a vent hole 202.

[0053] The vent 200 is a resilient structure. The inner cover 100 is located outside the vent 200 and is mounted on the top of the inner cover 100. The vent 200 is provided with a deflector surface on its periphery for fluid dripping. In one embodiment, the vent 200 has a tapered deflector ring with a downwardly tapering outer surface, and the vent holes 202 are arranged in a strip at the bottom end of the vent 200. In another embodiment, the bottom end of the vent 200 can be a downwardly convex arc-shaped structure, with the vent holes 202 defined in this arc.

[0054] The vent 200 may be a rubber structure, and the vent holes 202 may be strip holes, which are closed by the elastic force of the vent 200. Alternatively, a valve may be provided on the vent 200 to open and close the vent holes 202.

[0055] In order to improve installation efficiency, preferably, the ventilator 200 is an integrally formed structure.

[0056] When the pressure in the first chamber between the outer cover 300 and the inner cover 100 is less than or equal to the pressure in the second chamber within the inner cover 100, the vent 202 naturally closes. That is, the vent 202 closes under the elastic force of the vent 200 itself. Specifically, the first chamber can be vented to the atmosphere. When the pressure in the first chamber is greater than the pressure in the second chamber, the vent 202 opens, connecting the first and second chambers.

[0057] As can be seen from the above description, the urea tank cover provided in the specific embodiment of this application is provided with a vent 200. The vent 200 is an elastic structure, so that when the air pressure in the first chamber between the outer cover 300 and the inner cover 100 is less than or equal to the air pressure in the second chamber within the inner cover 100, the vent 202 naturally closes. When the air pressure in the first chamber exceeds the air pressure in the second chamber, the vent 202 opens, maintaining internal and external pressure balance. If urea in the urea tank splashes onto the vent 200 due to vibration or turbulence, the vent 202 remains closed, preventing urea leakage and thereby improving the performance of the urea tank.

[0058] like Figure 2 As shown, the outer surface of the arc structure is a hemispherical structure, and the arc structure is convex downward. Specifically, the outer surface and inner surface of the arc structure are both spherical structures. By setting the arc structure as a hemispherical structure, urea is prevented from adhering to crystallization.

[0059] In one embodiment, the vent 200 includes a support portion and a one-way check portion 201. The support portion is an annular structure, and its periphery is connected to the support plate 101 at the top of the inner cover 100. An arc-shaped structure is formed on the one-way check portion 201, and the top of the one-way check portion 201 is sealed with the periphery of the support portion. Specifically, the one-way check portion 201 can be sealed and bonded to the support portion, or integrally formed.

[0060] like Figures 2 to 4 As shown, the support portion includes an intermediate connector 203, a first clamping member 204, and a second clamping member 205. The thickness of the intermediate connector 203 is greater than or equal to the thickness of the support plate 101 at the top of the inner cover 100. The intermediate connector 203 is an annular member. Specifically, the intermediate connector 203 can be a circular ring structure. In this case, the support plate 101 is provided with a mounting hole that is loosely matched with the intermediate connector 203.

[0061] The first clamping member 204 is connected to the top of the intermediate connector 203 and is clamped to the upper surface of the support plate 101. Specifically, the first clamping member 204 can be a circular ring structure, and the first connector and the intermediate connector 203 are detachably connected. When installing the support portion, insert the first clamping member 204 into the mounting hole from the bottom end, and then connect the first clamping member 204 to the intermediate connector 203 to complete the installation of the support portion and the inner cover 100.

[0062] The second clamping member 205 is connected to the bottom end of the intermediate connecting member 203 and is clamped to the lower surface of the support plate 101. Specifically, the second connecting member can be a circular ring structure, and the second clamping member 205 is preferably integrally formed with the intermediate connecting member 203.

[0063] In order to improve assembly efficiency, preferably, the support portion and the one-way check portion 201 are an integrally formed structure, and during installation, the support portion is deformed and clamped to the support plate 101 .

[0064] The vent hole 202 is a strip-shaped hole, and the middle position of the strip-shaped hole is located at the bottom end of the one-way check portion 201 , and both ends extend to the bottom end of the second clamping member 205 .

[0065] In a specific embodiment, the urea tank cover also includes a urea shielding assembly, which includes a connecting ring 500 and a baffle 400. The connecting ring 500 is annular, and the top of the connecting ring 500 is connected to the lower surface of the top support plate 101 of the inner cover 100. The vent 200 is located in the space formed by the inner periphery of the connecting ring 500.

[0066] like Figure 1 As shown, the baffle 400 is mounted on the connecting ring 500 and is located below the ventilator 200. There are at least two baffles 400 from top to bottom. Specifically, two or at least three baffles 400 can be set inside the connecting ring 500. The structures of two adjacent baffles 400 can be the same or different.

[0067] The baffle 400 includes a baffle portion 401 and a vent portion 402. When projected from top to bottom, the vent portions 402 of two adjacent baffles 400 are isolated from each other. This means that the at least two baffles 400 form a curved maze-like passage through the vent portion 402, effectively preventing urea from splashing onto the vent member 200.

[0068] In a specific embodiment, Figure 5 As shown, multiple baffles 401 and vents 402 are provided, with adjacent baffles 401 separated by vents 402. Both baffles 401 and vents 402 are fan-shaped, with the two guides and vents 402 symmetrically arranged to prevent urea from directly splashing and contacting the vent 200, further reducing the risk of urea leakage and crystallization at the vent 200. Specifically, larger vents 402 can prevent urea from crystallizing and clogging the openings.

[0069] Specifically, such as Figure 6 As shown, the baffle 401 and the vent 402 of the baffle 400 are both arranged in a semicircular ring shape. At this time, in two adjacent baffles 400, the baffle 401 of one is directly opposite to the vent 402 of the other.

[0070] In order to improve the performance of the urea tank cover, Figure 7 As shown, at least two vents 200 are mounted on the inner cover 100. The vents 200 on the inner cover 100 may be arranged in a strip shape.

[0071] Alternatively, the vents 200 are evenly distributed around the center of the inner cover 100. In this case, the vents 200 are distributed in a ring shape. By providing multiple vents 200, the situation where the urea tank cannot be ventilated due to blockage of the vents 200 is reduced.

[0072] In a specific application, when the urea consumption pressure in the urea tank is low, the air pressure in the first chamber is greater than that in the second chamber. The pressure allows outside air to push open the slit and enter the tank, maintaining internal and external pressure balance. If urea in the urea tank splashes onto the rubber nozzle due to vibration or turbulence, the vent 202 remains closed. The higher the pressure, the tighter the rubber fit, preventing urea leakage. Furthermore, the hemispherical one-way check 201 allows splashed urea to collect and drip onto the bottom, preventing crystallization at the one-way check 201. The opening and closing of the vent 202 on the one-way check 201 also effectively prevents the formation of crystals.

[0073] The present application provides a urea tank, comprising a urea tank body and a urea tank cover mounted on top of the urea tank body, wherein the urea tank cover is any of the above-mentioned urea tank covers. The above description of the specific structure of the urea tank cover is provided, and the present application includes the above-mentioned urea tank cover and also has the above-mentioned technical effects.

[0074] The present application provides a power device including a urea tank cover, wherein the urea tank cover is any of the above-mentioned urea tank covers. The above description describes the specific structure of the urea tank cover. The present application includes the above-mentioned urea tank cover and also has the above-mentioned technical effects.

[0075] Specifically, the power device may be an engine, a locomotive, etc.

[0076] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0077] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A urea tank cover, characterized in that: include: outer cover (300); An inner cover (100), wherein the outer cover (300) is sleeved on the outer side of the inner cover (100); A vent (200), wherein the vent (200) is an elastic structure, the inner cover (100) is located outside the vent (200), the vent (200) is installed on the top of the inner cover (100), and the outer periphery of the vent (200) is provided with a guide surface for fluid dripping, and the vent is provided with a vent hole (202); when the air pressure of the first chamber between the outer cover (300) and the inner cover (100) is less than or equal to the air pressure of the second chamber in the inner cover (100), the vent (202) is naturally closed; when the air pressure of the first chamber is greater than the air pressure of the second chamber, the vent (202) is opened, and the first chamber and the second chamber are connected.

2. The urea tank cover according to claim 1, characterized in that: The bottom end of the vent (200) is a downwardly protruding arc-shaped structure, and the vent hole (202) is provided in the arc-shaped structure.

3. The urea tank cover according to claim 2, characterized in that: The vent (200) is a rubber structure; And / or, the ventilator (200) is an integrally formed structure; And / or, the outer surface of the arc-shaped structure is a hemispherical structure, and the arc-shaped structure is convex downward.

4. The urea tank cover according to claim 2, characterized in that: The ventilator (200) comprises: A support portion, the support portion being an annular structure, the outer periphery of the support portion being connected to the support plate (101) at the top end of the inner cover (100); A one-way check portion (201), wherein the arc-shaped structure is formed on the one-way check portion (201), and the top end of the one-way check portion (201) is sealed and connected to the outer periphery of the support portion.

5. The urea tank cover according to claim 4, characterized in that: The support portion includes: an intermediate connecting member (203), the thickness of the intermediate connecting member (203) being greater than or equal to the thickness of the support plate (101), and the intermediate connecting member (203) being an annular member; a first clamping member (204), the first clamping member (204) being connected to the top end of the intermediate connecting member (203) and being clamped to the upper surface of the support plate (101); A second clamping member (205), the second clamping member (205) is connected to the bottom end of the intermediate connecting member (203) and is clamped to the lower surface of the support plate (101).

6. The urea tank cover according to claim 5, characterized in that: The vent hole (202) is a strip-shaped hole, and the middle position of the strip-shaped hole is located at the bottom end of the one-way check portion (201), and both ends extend to the bottom end of the second clamping member (205).

7. The urea tank cover according to claim 1, characterized in that: At least two vents (200) are installed on the inner cover (100); And / or, the vents (200) are evenly distributed in the circumferential direction with the center of the inner cover (100) as the center of the circle.

8. The urea tank cover according to any one of claims 1 to 7, characterized in that: Also included is a urea shielding component, the urea shielding component comprising: A connecting ring (500), the connecting ring (500) is annular, the top end of the connecting ring (500) is connected to the lower surface of the top support plate (101) of the inner cover (100), and the vent (200) is located in a space formed on the inner periphery of the connecting ring (500); A baffle (400), the baffle (400) being mounted on the connecting ring (500) and located below the ventilator (200); at least two baffles (400) are provided from top to bottom; the baffle (400) comprises a baffle portion (401) and a ventilator portion (402); and when projected from top to bottom, two adjacent baffles (400) are isolated and arranged by the ventilator portion (402).

9. The urea tank cover according to claim 8, characterized in that: The baffle portion (401) and the vent portion (402) of the baffle plate (400) are both arranged in a semicircular ring shape; Alternatively, a plurality of the flow blocking portions (401) and the vent portions (402) are provided, and two adjacent flow blocking portions (401) are spaced apart by the vent portions (402).

10. A urea tank, characterized in that: The invention comprises a urea tank body and a urea tank cover installed on the top of the urea tank body, wherein the urea tank cover is the urea tank cover according to any one of claims 1 to 9.

11. A power device, characterized in that: It comprises a urea tank cover, and the urea tank cover is the urea tank cover according to any one of claims 1 to 9.

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