Excavator and urea box ventilation device thereof

Abstract

The utility model discloses an excavator and a urea box ventilation device thereof. Comprising a mounting plate fixed on a mounting platform through a first fastener, connecting plates arranged at one end of the mounting plate, a top plate vertically connected to the two connecting plates, a protective cover arranged between the connecting plates and the top plate, a filter arranged in the protective cover, and a breather pipe communicated between the filter and a urea box, the top of the protective cover is connected to the bottom of the top plate in a sealed mode, the two sides of the protective cover are connected to the connecting plate in a sealed mode, and the bottom of the protective cover is open. According to the device, the closed protective cover is matched with the high-position filter higher than the urea box, the solution is prevented from flowing backwards and crystallizing through gravity, the dust content of air entering the urea box is reduced, impurity pollution and pipeline blockage are eradicated from the source, air pressure balance of the urea box in the urea solution filling and consuming process is ensured, and normal use of the urea box is maintained; and the service life is prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of excavator urea tank, specifically relating to an excavator and its urea tank ventilation device. Background Technology

[0002] In the excavator industry, with increasingly stringent environmental regulations, engines using oxidation catalytic converters, diesel particulate filters, and selective catalytic reduction aftertreatment technologies have become mainstream. These engines perform well in emission control, but they require the use of urea solution during operation to reduce nitrogen oxide emissions. As a key component for storing urea solution, the performance of the urea tank directly affects the engine's emission performance and overall operating efficiency.

[0003] There are two main problems in the use of urea tanks: the filling of urea solution and the balance of air pressure inside and outside the tank. When adding urea solution, it is necessary to quickly vent the gas inside the tank to ensure a smooth filling process. However, the first type of urea tank venting device in the existing technology, which connects a flexible hose to the top of the tank, solves the ventilation problem to some extent. However, the vertical downward design of the hose's free end makes it easy for dust and impurities to enter, thus contaminating the urea solution. Furthermore, the overflowing urea solution mixed with dust in the hose can easily... The first type of urea tank venting device is prone to clogging the pipeline, causing negative pressure to form in the urea tank during the consumption of urea solution, which can lead to the tank being sucked down and affecting normal use. The second type of urea tank venting device, which integrates vent holes on the urea tank cover, is more compact in structure, but it has revealed new problems in actual use. The vent holes are directly exposed to the air, and dust and impurities can easily enter the urea tank, contaminating the urea solution. This not only affects the purity of the urea solution, but may also damage the engine's emission control system. Therefore, there is an urgent need for a venting device for excavators and their urea tanks. Utility Model Content

[0004] To address some or all of the technical problems existing in the prior art, this utility model provides a urea tank venting device for an excavator. The urea tank venting device is mounted on a platform above the urea tank. The device includes a mounting plate fixed to the mounting platform by a first fastener, a connecting plate disposed at one end of the mounting plate, a top plate vertically connected to the two connecting plates, a protective cover disposed between the connecting plate and the top plate, a filter disposed within the protective cover, and a vent pipe connecting the filter and the urea tank.

[0005] A first hose clamp is provided where the vent pipe connects to the filter, and a second hose clamp is provided where the vent pipe connects to the urea tank. The top of the protective cover is sealed to the bottom of the top plate, and the two sides are sealed to the connecting plate. The bottom is open.

[0006] The mounting plate has a first mounting hole, and the platform has a second mounting hole that matches the first mounting hole. The mounting plate and the platform are fixed together by a first fastener passing through the first mounting hole and the second mounting hole in sequence and then threaded with a fastening nut. The connecting plate has a first fixing hole through it. A bracket is connected to the outside of the filter. The bracket has second fixing holes that match the first fixing hole at both ends. The bracket and the connecting plate are fixed together by a second fastener passing through the first fixing hole and the second fixing hole in sequence and then threaded with a fastening nut.

[0007] In one specific embodiment, in the urea tank ventilation device for excavators described above, a plurality of parallel reinforcing ribs are provided between the mounting plate and the connecting plate.

[0008] In one specific embodiment, in the above-mentioned urea tank ventilation device for excavators, the filter is 30-50 cm higher than the urea tank.

[0009] In one specific embodiment, in the above-mentioned urea tank ventilation device for excavators, the first fastener is a fastening bolt.

[0010] In one specific embodiment, in the urea tank ventilation device for excavators described above, the second fastener is a flange bolt.

[0011] On the other hand, the present invention also provides an excavator, which includes the above-mentioned urea tank ventilation device.

[0012] The urea tank ventilation device for excavators of this utility model has the following advantages and beneficial effects:

[0013] This device has a simple structure and is easy to assemble and disassemble. It uses a closed protective cover with a high-level filter that is higher than the urea tank to prevent solution backflow and crystallization by gravity, reducing the dust content of the air entering the urea tank and eliminating impurities and pipeline blockages at the source. This ensures the air pressure balance of the urea tank during the filling and consumption of urea solution, maintains the normal use of the urea tank, and extends its service life. In addition, it is equipped with reinforcing ribs, which significantly improves the stability of the device and can withstand severe air pressure fluctuations and high-frequency vibrations, making it highly practical. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for further understanding of the embodiments of this utility model and constitute a part of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0015] Figure 1 This is a structural schematic diagram of the urea tank ventilation device for an excavator according to the present invention.

[0016] Figure 2 This is a schematic diagram of the protective cover in the urea tank ventilation device for excavators according to this utility model;

[0017] Figure 3 This is a schematic diagram of the support structure in the urea tank ventilation device for excavators according to this utility model;

[0018] Figure 4 This is a diagram showing the usage status of the urea tank ventilation device for excavators according to this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1-Mounting plate, 11-First mounting hole, 12-First fastener, 2-Connecting plate, 21-First fixing hole, 22-Second fastener, 3-Top plate, 4-Protective cover, 5-Filter, 6-Ventilation pipe, 61-First hose clamp, 7-Reinforcing rib plate, 8-Bracket, 81-Second fixing hole, 9-Fastening nut, 100-Urea tank, 200-Platform. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] like Figures 1 to 4 As shown, this utility model discloses an excavator and its urea tank ventilation device.

[0023] On one hand, this utility model discloses a urea tank ventilation device for an excavator. The urea tank ventilation device is installed on a mounting platform 200 above the urea tank 100. The urea tank ventilation device for the excavator includes a mounting plate 1 fixed to the mounting platform 200 by a first fastener 12, a connecting plate 2 disposed at one end of the mounting plate 1, a top plate 3 vertically connected to the two connecting plates 2, a protective cover 4 disposed between the connecting plate 2 and the top plate 3, a filter 5 disposed within the protective cover 4, and a ventilation pipe 6 connecting the filter 5 and the urea tank 100. One end of the ventilation pipe 6 is connected to the output port of the filter 5, and the other end is connected to the output port of the urea tank 100. A first hose clamp 61 is provided at the connection point of the ventilation pipe 6 to the filter 5, and a second hose clamp is provided at the connection point of the ventilation pipe 6 to the urea tank 100. The structure of the second hose clamp is the same as that of the first hose clamp, so it is not shown in the figure. The hose clamp ensures a tight seal at the connection. The top of the protective cover 4 is sealed to the bottom of the top plate 3, and the sides are sealed to the connecting plate 2. The bottom is open to facilitate the installation and replacement of the filter 5, and air can flow into the filter 5 through the opening. The mounting plate 1 has a first mounting hole 11, and the platform 200 has a second mounting hole that matches the first mounting hole 11. The mounting plate 1 and the platform 200 are fixed together by the first fastener 12 passing through the first mounting hole 11 and the second mounting hole in sequence, and then threadedly engaged with the fastening nut 9. The connecting plate 2 has a first fixing hole 21. The filter 5 is connected to the outside of the bracket 8. The bracket 8 has a second fixing hole 81 at both ends that matches the first fixing hole 21. The bracket 8 and the connecting plate 2 are fixed together by the second fastener 22 passing through the first fixing hole 21 and the second fixing hole 81 in sequence, and then threadedly engaged with the fastening nut 9.

[0024] As one specific implementation, in the urea tank ventilation device for excavators of this utility model, a plurality of parallel reinforcing ribs 7 are provided between the mounting plate 1 and the connecting plate 2. This arrangement improves the overall stability of the device and ensures its durability in harsh working environments.

[0025] In one specific embodiment, in the urea tank ventilation device for excavators of this utility model, the height of filter 5 is 30-50cm higher than the height of urea tank 100, more specifically, the height of filter 5 is 40cm higher than the height of urea tank 100. This setting can effectively prevent urea solution from splashing into the interior of filter 5 during filling or consumption, thereby ensuring the cleanliness and service life of filter 5. At the same time, the higher position of filter 5 also helps to reduce the entry of dust and impurities, further improving the purity of urea solution.

[0026] In one specific embodiment, in the urea tank ventilation device for excavators of this utility model, the first fastener 12 is a fastening bolt. Of course, other fasteners such as screws can also be used, as long as the fixing effect is met.

[0027] In one specific embodiment, in the urea tank ventilation device for excavators of this utility model, the second fastener 22 is a flange bolt. Of course, other fasteners such as screws can also be used, as long as the fixing effect is met.

[0028] On the other hand, the present invention also provides an excavator, which includes the above-mentioned urea tank ventilation device.

[0029] The working principle of the urea tank ventilation device for excavators of this utility model is as follows:

[0030] During use, when urea solution needs to be added to the urea tank 100, the urea solution enters the urea tank 100 through the filling port. At the same time, the gas in the urea tank 100 passes through the vent pipe 6 and is discharged through the filter 5. Due to the presence of the filter 5, dust and impurities can be effectively prevented from entering the urea tank 100 through the vent pipe 6, thereby avoiding the problem of urea solution contamination. At the same time, when the urea solution is consumed by the engine, a negative pressure is formed inside the urea tank 100. At this time, outside air enters the urea tank 100 through the filter 5 and the vent pipe 6 in sequence to maintain the balance of air pressure inside and outside the urea tank 100.

[0031] In summary, compared with the prior art, the urea tank ventilation device for excavators of this utility model has the following advantages and beneficial effects:

[0032] This device has a simple structure and is easy to assemble and disassemble. It uses a closed protective cover 4 and a high-level filter 5 that is higher than the urea tank 100 to prevent solution backflow and crystallization by gravity, thereby reducing the dust content of the air entering the urea tank 100 and eliminating impurities and pipeline blockages at the source. This ensures the air pressure balance of the urea tank 100 during the filling and consumption of urea solution, maintains the normal use of the urea tank 100, and extends its service life. In addition, it is equipped with reinforcing ribs 7, which significantly improves the stability of the device and can withstand severe air pressure fluctuations and high-frequency vibrations, making it highly practical.

[0033] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement state shown in the accompanying drawings.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A urea tank vent device for a shovel, the urea tank vent device being provided on a mounting platform above a urea tank, characterized by, The urea tank ventilation device for the excavator comprises a mounting plate fixed to the mounting platform by first fasteners, a connecting plate arranged at one end of the mounting plate, a top plate vertically connected to the connecting plate, a protective cover arranged between the connecting plate and the top plate, a filter arranged in the protective cover, and a ventilation pipe communicated between the filter and the urea tank. The ventilation pipe is provided with a first throat clamp at the position communicated with the filter, and a second throat clamp at the position communicated with the urea tank, the top of the protective cover is sealingly connected to the bottom of the top plate, and the two sides are sealingly connected to the connecting plate, and the bottom is provided with an opening; A first mounting hole is formed in the mounting plate, a second mounting hole matched with the first mounting hole is formed in the platform, the mounting plate and the platform are fixed by the first fasteners sequentially penetrating the first mounting hole, the second mounting hole and then threadedly cooperating with the fastening nuts, a first fixing hole is formed in the connecting plate in a penetrating manner, a support is connected to the outside of the filter, second fixing holes matched with the first fixing hole are formed in both ends of the support, and the support and the connecting plate are fixed by the second fasteners sequentially penetrating the first fixing hole, the second fixing hole and then threadedly cooperating with the fastening nuts.

2. The urea tank venting device for a excavator according to claim 1, characterized by, A plurality of reinforcing rib plates parallel to each other are arranged between the mounting plate and the connecting plate.

3. The urea tank venting device for a excavator according to claim 1, characterized by, The filter is 30-50 cm higher than the urea tank.

4. The urea tank venting device for a excavator according to claim 1, characterized by, The first fasteners are fastening bolts.

5. The urea tank venting device for an excavator according to claim 1, characterized by The second fasteners are flange bolts.

6. An excavator characterized by comprising: The excavator comprises the urea tank ventilation device according to any one of claims 1-5.

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