Self-cleaning drainage filtering device

Abstract

The utility model discloses and provides a self-cleaning drainage filtering device which is arranged between an electric drainage device and an air cylinder, can filter out impurities before the impurities flow into the electric drainage device, and can discharge the impurities through simple operation. The self-cleaning check valve is high in error-tolerant rate and internally has a self-cleaning function, and the problem that the valve element is blocked and stuck can be solved through simple manual operation. The electric drainage valve comprises a valve body element and a valve core element, a valve core mounting cavity, an impurity gathering cavity and a backwashing channel are arranged in the valve body element, an electric drainage connector is arranged at one end of the valve body element and matched with an external drainage device, and a filter screen element is arranged in the impurity gathering cavity and matched with the filter screen element. The valve element is matched in the valve element installation cavity in a floating mode, the upper end and the lower end of the valve body element are an air cylinder connecting end and a valve deck connecting end respectively, the air cylinder connecting end is matched with an external air storage tank, and the valve deck connecting end is matched with the valve deck element. The device is applied to the field of filtering devices.

Description

Technical Field

[0001] The utility model is applied to the field of filtering devices, and particularly relates to a self-cleaning drainage filtering device. Background Art

[0002] Due to the high braking force required by pure electric buses, pneumatic braking is essentially the only braking method. Each bus is equipped with an electric air compressor, which pressurizes air outside the vehicle and delivers it to an onboard air reservoir. The high-pressure air in the reservoir is not only used for braking but also for operations such as opening and closing the pneumatic doors. Buses, in particular, must continuously draw in and store air in the reservoir during operation. The air outside the vehicle can contain impurities such as moisture and dust. Even with the necessary filtration installed at the front of the air compressor, some water and tiny particles of impurities can still enter the reservoir. Excessive accumulation of moisture and impurities inside the reservoir can cause corrosion within the steel reservoir, clog valves in the brake lines, and even reduce the reservoir's internal air volume, ultimately affecting braking performance and potentially endangering passenger safety. To address this issue, previous solutions involved installing a manual drain device at the lowest point of the reservoir. By periodically pressing the manual drain valve, accumulated moisture and impurities are drained away due to the combined effects of internal pressure and gravity. This solution significantly increases the manual maintenance costs of vehicle operation. For example, buses often require daily cleaning. Vehicles typically have multiple air tanks installed, distributed throughout the vehicle chassis. Each tank requires a manual drain, requiring the vehicle to be driven to a ditch for operation, which is extremely inconvenient. Some vehicle manufacturers also design a linkage mechanism that allows for simultaneous drainage of all or multiple tanks on the vehicle through a single operation. Since the tanks are located throughout the vehicle chassis, this linkage mechanism increases the complexity and failure rate of the original system. To address these issues, a self-cleaning drainage filter device could be designed, installed between the electric drain device and the air tanks. This filter could filter out impurities before they enter the electric drain, allowing for simple manual removal. The drainage filter device would also have a self-cleaning function. Its backwashing function would replace the tedious task of regularly disassembling the electric drain valve to clean the filter screen and impurities on the inner wall of the air tank, further reducing the cost of daily vehicle maintenance. This would effectively address these issues. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a self-cleaning drainage filter device. The device is installed between the electric drain device and the air reservoir, which can filter out impurities before entering the electric drain device and discharge the impurities through simple operation. The present invention has a high fault tolerance rate and an internal self-cleaning function. With a simple operation, it can solve the problem of valve core blockage and jamming. Its backwash function is completed by simple manual operation, replacing the tedious work of regularly disassembling and assembling the electric drain valve to clean the filter screen and impurities on the inner wall of the air reservoir, further reducing the daily maintenance costs of the entire vehicle.

[0004] The technical solution adopted by the present invention is: the present invention includes a valve body element and a valve core element, and a valve core installation cavity, an impurity collection cavity and a backwash channel are provided in the valve body element, and the impurity collection cavity is provided on one side of the valve body element, and an electric drain connection port is provided at one end of the valve body element away from the valve core installation cavity, and the electric drain connection port cooperates with an external drainage device, and a filter element is provided in the impurity collection cavity, and the valve core element floats and cooperates in the valve core installation cavity, and the upper and lower ends of the valve body element are respectively an air cylinder connection end and a valve cover connection end, and the air cylinder connection end cooperates with an external air tank, and the valve cover connection end cooperates with the valve cover element, and one end of the backwash channel is communicated with the impurity collection cavity between the filter element and the electric drain connection port. It can be seen that high-pressure gas, water and several impurities enter the valve core installation cavity and the impurity collection cavity in turn through the gas cylinder connection end, several impurities are blocked by the filter element, and high-pressure gas and water flow into the external drainage device, and the filter element serves to block several impurities. The gas cylinder connection end serves to be connected to the external gas cylinder, and water enters the external drainage device through the electric drainage connection port, and the electric drainage connection port serves to be connected to the external drainage device. The valve core element floats in the valve core installation cavity, pushing the valve core element, and the position of the valve core element changes, which also causes the working state of the present invention to change. The valve core element serves to switch the working state, and the valve body element serves to support and limit and parts.

[0005] Furthermore, a spring element is provided between the valve body element and the valve core element, and two ends of the spring element are respectively limitedly matched with the valve body element and the valve core element.

[0006] Furthermore, a filter screen installation groove is provided in the impurity collection cavity, and the filter screen installation groove is limitedly matched with the filter screen element.

[0007] Furthermore, the electric drainage connection port is limited and matched with the external drainage device through an internal thread structure, the air cylinder connection end and the valve cover connection end are provided with an external thread structure, the air cylinder connection end is limited and matched with the external air tank through the external thread structure, and the valve cover connection end is limited and matched with the valve cover element through the external thread structure.

[0008] Furthermore, the upper and lower ends of the valve cover element are respectively provided with valve body connecting threads and backwash outlets, the valve body connecting threads are limitedly matched with the valve cover connecting end, the valve cover element is sealed with the valve body element through the valve body connecting threads and the lower sealing ring, and a second sealing ring mounting groove is provided between the valve body connecting threads and the backwash outlet, and the second sealing ring mounting groove is limitedly matched with the lower sealing ring.

[0009] Furthermore, the valve body element is provided with a first sealing ring installation groove and a spring installation groove on the inner wall near the air cylinder connection end, the first sealing ring installation groove is limitedly matched with an upper sealing ring, the spring installation groove is limitedly matched with the spring element, and a positioning key installation groove is provided on the inner wall of one side of the valve body element, the upper limit of the positioning key installation groove is matched with a positioning key element, and the positioning key element is slidably matched with the valve core element.

[0010] Furthermore, the filter element has a conical structure, a plurality of filter mesh holes are evenly distributed on the filter element, and a plurality of fixing buckles are evenly provided on the end of the filter element, and the fixing buckles are limitedly matched with the filter installation groove.

[0011] Furthermore, the connecting end of the gas cylinder is limitedly matched with the external gas tank through a fastening nut and an external thread structure, and the fastening nut is provided with an interface sealing ring for sealing with the external gas tank.

[0012] Furthermore, a spring installation cavity and a backwash sink are respectively provided at the upper and lower ends of the valve core element, the spring installation cavity is limitedly matched with the spring element, a guide port is provided on one side of the spring installation cavity, and a guide groove is provided on one side of the valve core element, and the guide groove is slidably matched with the positioning key element.

[0013] Furthermore, the diameter of the backwashing sink is 1 mm to 3 mm smaller than the inner diameter of the valve core installation cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural view of the utility model;

[0015] Figure 2 This is an exploded structural view of the present utility model;

[0016] Figure 3 This is a cross-sectional view of the structure of the utility model in a filtering state;

[0017] Figure 4 is a structural cross-sectional view of the filter element in a moving state;

[0018] Figure 5 This is a structural cross-sectional view of the utility model in a backwashing state;

[0019] Figure 6 is a structural sectional view of the valve body element;

[0020] Figure 7 is a structural sectional view of the valve core element;

[0021] Figure 8 is a structural sectional view of the valve cover element;

[0022] Figure 9 is a structural view of the filter element;

[0023] Figure 10 yes Figure 5 A partially enlarged structural cross-sectional view of the middle A. DETAILED DESCRIPTION

[0024] like Figures 1 to 5As shown, in this embodiment, the utility model includes a valve body element 1 and a valve core element 2, and the valve body element 1 is provided with a valve core installation cavity 10, an impurity collection cavity 11 and a backwash channel 12, and the impurity collection cavity 11 is provided on one side of the valve body element 1, and the end of the valve body element 1 away from the valve core installation cavity 10 is provided with an electric drain connection port 13, and the electric drain connection port 13 cooperates with an external drainage device, and a filter element 3 is provided in the impurity collection cavity 11, and the valve core element 2 floats and fits in the valve core installation cavity 10, and the upper and lower ends of the valve body element 1 are respectively an air cylinder connection end 14 and a valve cover connection end 15, and the air cylinder connection end 14 cooperates with an external air tank, and the valve cover connection end 15 cooperates with the valve cover element 4, and one end of the backwash channel 12 is connected to the impurity collection cavity 11 between the filter element 3 and the electric drain connection port 13. It can be seen that high-pressure gas, water and several impurities enter the valve core installation cavity 10 and the impurity collection cavity 11 in turn through the gas cylinder connection end 14, and several impurities are blocked by the filter element 3. High-pressure gas and water flow into the external drainage device, and the filter element 3 serves to block several impurities. The gas cylinder connection end 14 serves to connect with the external gas cylinder, and water enters the external drainage device through the electric drainage connection port 13, and the electric drainage connection port 13 serves to connect with the external drainage device. The valve core element 2 floats and fits in the valve core installation cavity 10, pushing the valve core element 2. The position of the valve core element 2 changes, which also causes the working state of the present invention to change. The valve core element 2 serves to switch the working state, and the valve body element 1 serves to support and limit and parts.

[0025] like Figures 3 to 5 As shown, in this embodiment, a spring element 6 is provided between the valve body element 1 and the valve core element 2, and the two ends of the spring element 6 respectively cooperate with the valve body element 1 and the valve core element 2 to limit the position. It can be seen that the valve body element 1 and the valve core element 2 play a supporting and limiting role for the spring element 6. When the drainage filter device of the present invention is in the filtering state, the spring element 6 provides a downward pressing force to the valve core element 2, causing the valve core element 2 to be pressed against the lower sealing ring 8 and the valve cover element 4. When the drainage filter device of the present invention is in the backwashing state, the valve core element 2 is manually pushed upward through the backwash outlet 41. When the manually applied force is withdrawn, the spring element 6 will push the valve core element 2 downward to press it against the lower sealing ring 8 and the valve cover element 4, and the spring element 6 plays a role in resetting the valve core element 2.

[0026] like Figures 3 to 6As shown, in this embodiment, a filter installation groove 110 is provided in the impurity collection chamber 11, and the filter installation groove 110 is engaged with the filter element 3. Thus, the filter installation groove 110 supports and limits the filter element 3, and the filter element 3 blocks impurities in the water to prevent clogging of the valves.

[0027] like Figure 6 As shown, in this embodiment, the electric drain connection port 13 is limited and matched with the external drain device through an internal thread structure, the gas cylinder connection end 14 and the valve cover connection end 15 are provided with external thread structures, the gas cylinder connection end 14 is limited and matched with the external gas tank through the external thread structure, and the valve cover connection end 15 is limited and matched with the valve cover element 4 through the external thread structure. It can be seen that the electric drain connection port 13 is connected and matched with the external drain device through the internal thread structure, the gas cylinder connection end 14 is engaged with the internal thread of the mounting hole at the bottom of the external gas cylinder through the external thread structure to achieve the function of installation connection and matching, and the valve cover connection end 15 is engaged with the valve body element 1 through the external thread structure to achieve the function of installation connection and matching. At the same time, the threaded engagement also ensures the sealing between the electric drain connection port 1 and the external drain device, the valve body element 1 and the external gas cylinder, and the valve cover connection end 15 and the valve body element 1.

[0028] like Figure 3 、 Figure 4 、 Figure 5 and Figure 8 As shown, in this embodiment, the upper and lower ends of the valve cover element 4 are respectively provided with a valve body connecting thread 40 and a backwash outlet 41. The valve body connecting thread 40 is limited in position with the valve cover connecting end 15. The valve cover element 4 is sealed with the valve body element 1 through the valve body connecting thread 40 and the lower sealing ring 8. A second sealing ring mounting groove 42 is provided between the valve body connecting thread 40 and the backwash outlet 41. The second sealing ring mounting groove 42 is limited in position with the lower sealing ring 8. It can be seen that the valve body connecting thread 40 and the external thread structure on the valve cover connecting end 15 are engaged with each other to play a connecting role, the backwash outlet 41 plays a role in discharging impurities from the external environment, the second sealing ring mounting groove 42 plays a supporting and limiting role for the lower sealing ring 8, and the lower sealing ring 8 plays a sealing role for the valve core element 2.

[0029] like Figures 3 to 6As shown, in this embodiment, the valve body element 1 is provided with a first sealing ring installation groove 16 and a spring installation groove 17 on the inner wall near the gas cylinder connection end 14. The first sealing ring installation groove 16 is limited and matched with the upper sealing ring 5, and the spring installation groove 17 is limited and matched with the spring element 6. The inner wall of one side of the valve body element 1 is provided with a positioning key installation groove 18. The upper limit of the positioning key installation groove 18 is matched with the positioning key element 7, and the positioning key element 7 is slidably matched with the valve core element 2. It can be seen that the first sealing ring installation groove 16 has a limiting and supporting effect on the upper sealing ring 5, the spring installation groove 17 has a fixing and limiting effect on the upper end surface of the spring element 6, the positioning key installation groove 18 has a limiting and supporting effect on the positioning key element 7, and the positioning key element 7 has a limiting and guiding effect on the valve core element 2.

[0030] like Figure 3 、 Figure 4 、 Figure 5 and Figure 9 As shown, in this embodiment, the filter element 3 exhibits a conical structure, with a number of filter mesh holes 30 evenly distributed throughout. Several fixing clips 31 are evenly disposed on the ends of the filter element 3, and the fixing clips 31 engage with the filter mounting slots 110. As can be seen, the conical structure of the filter element 3 significantly improves pressure resistance and filtration efficiency. The filter mesh holes 30 confine impurities with a diameter larger than the filter mesh holes to the impurity accumulation chamber at the front end. The fixing clips 31 engage with the filter mounting slots 110 to provide support and connection.

[0031] like Figures 2 to 5 As shown, in this embodiment, the gas cylinder connection end 14 is limitedly engaged with the external gas tank via a fastening nut 9 and an external threaded structure. The fastening nut 9 is provided with an interface sealing ring 90 for sealing with the external gas tank. Thus, it can be seen that the fastening nut 9 first engages with the external threaded structure on the valve body component 1. The valve body component 1 engages with the external gas tank thread via the external threaded structure. Tightening the fastening nut 9 compresses the interface sealing ring 90, thereby achieving a sealing effect at the interface between the valve body component 1 and the external gas tank. The interface sealing ring 90 seals the interface between the valve body component 1 and the external gas tank.

[0032] like Figure 3 、 Figure 4 、 Figure 5 and Figure 7As shown, in this embodiment, the upper and lower ends of the valve core element 2 are respectively provided with a spring installation cavity 20 and a backwashing sink 21, the spring installation cavity 20 is limitedly matched with the spring element 6, a guide port 22 is provided on one side of the spring installation cavity 20, and a guide groove 23 is provided on one side of the valve core element 2, and the guide groove 23 is slidably matched with the positioning key element 7. It can be seen that the valve core element 2 supports the spring mounting chamber 20, the backwashing sink 21 and the guide groove 23. The spring mounting chamber 20 limits the lower end face of the spring element 6. When the present invention is in the filtering state, the guide port 22 is connected to the impurity accumulation chamber 10, and the backwashing sink 21 blocks the impurity accumulation chamber 10. When the present invention is in the backwashing state, the backwashing sink 21 is connected to the impurity accumulation chamber 10, and the guide port 22 is connected to the backwash channel 12. The backwashing sink 21 blocks and conducts the impurity accumulation chamber 10, and the guide port 22 acts as a switching switch. The guide groove 23 slides with the positioning key element 7, and limits and guides the valve core element 2 when it cooperates with the valve body element 1 up and down.

[0033] like Figure 4 、 Figure 5 and Figure 10 As shown, in this embodiment, the diameter of the backwashing platform 21 is 1 mm to 3 mm smaller than the inner diameter of the valve core installation cavity 10. Therefore, it can be seen that the smaller diameter of the backwashing platform 21 than the inner diameter of the valve core installation cavity 10 allows high-pressure gas to flow out of the gap, thereby driving impurities out of the external environment through the backwashing outlet 41.

[0034] In this embodiment, the working principle of the utility model is as follows:

[0035] The working principle of the present invention is divided into three states, and the working principles of the three states are as follows.

[0036] like Figure 3 As shown, the utility model is in a filtering state: the valve body element 1 is threadedly matched with the external electric drainage device through the electric drainage connection port 13, and the external electric drainage device is connected to the atmospheric environment outside the vehicle. The drain port is opened, and the accumulated water and impurities are driven by the high-pressure gas inside the external air cylinder and flow through the impurity accumulation chamber 11 together. Since the high-pressure gas simultaneously presses the valve core element 2 tightly against the lower sealing ring 8 and the backwash outlet 41, the backwash outlet 41 is closed, and the impurities are finally blocked by the filter element 3 in the impurity accumulation chamber 11, and the accumulated water is finally discharged to the outside of the vehicle through the electric drainage device.

[0037] like Figure 4As shown, the utility model is in the state of the valve core movement process of the backwash filter device: the electric drain device at the rear end of the present invention is used to close the drain port, and the bottom surface of the valve core element 2 is manually pressed upward from the bottom of the valve body element 1. The valve core element 2 moves upward under the action of the external force. When the lower bottom surface of the valve core element 2 leaves the lower sealing ring 8 and the upper top surface of the valve core element 2 but has not yet contacted the upper sealing ring 5, most of the airflow entering the interior of the valve body 1 will flow around the valve core element 2 and finally be discharged through the backwash outlet 41 of the valve cover element 4. During this process, the airflow flowing around the valve core element 2 will remove impurities and other attachments on the surface of the valve core element 2 and the inner wall of the valve cover element 1, thereby achieving the self-cleaning effect of the present invention.

[0038] like Figure 5 As shown, the utility model is in a backwashing state: the electric drainage device at the rear end of the present invention is used to close the drain outlet, and the bottom surface of the valve core element 2 is manually pressed from the bottom to the top from the valve body element 1. The valve core element 2 moves upward under the action of external force, and the lower bottom surface of the valve core element 2 leaves the lower sealing ring 8 and finally stops at the position of the upper sealing ring 5. The upper surface of the valve core element 2 presses the upper sealing ring 5. At this time, the valve core installation cavity 10 inside the valve body element 1 is divided into two cavities, the upper cavity is directly connected to the backwash channel 12, and the lower cavity is directly connected to the impurity accumulation cavity 11. Driven by the high-pressure gas inside the external air cylinder, the high-pressure airflow flows from the backwash channel 12 to the rear end of the filter element 3, and then flows into the impurity accumulation cavity 11, and finally the impurities inside the impurity accumulation cavity 11 are discharged from the backwash outlet 41 of the valve cover element 4.

[0039] Although the embodiments of the present invention are described with practical solutions, they do not limit the meaning of the present invention. For those skilled in the art, it is obvious to modify the implementation scheme and combine it with other solutions based on this description.

Claims

1. A self-cleaning drainage filter device, characterized by: It comprises a valve body element (1) and a valve core element (2), wherein the valve body element (1) is provided with a valve core installation cavity (10), an impurity collection cavity (11) and a backwash channel (12), wherein the impurity collection cavity (11) is provided on one side of the valve body element (1), and an electric drainage connection port (13) is provided at one end of the valve body element (1) away from the valve core installation cavity (10), wherein the electric drainage connection port (13) cooperates with an external drainage device, and a filter is provided in the impurity collection cavity (11). The valve core element (2) is float-fitted in the valve core installation cavity (10), the upper and lower ends of the valve body element (1) are respectively an air cylinder connection end (14) and a valve cover connection end (15), the air cylinder connection end (14) is matched with an external air tank, the valve cover connection end (15) is matched with the valve cover element (4), and one end of the backwash channel (12) is connected to the impurity collection cavity (11) between the filter element (3) and the electric drain connection port (13).

2. A self-cleaning drainage filter device according to claim 1, characterized in that: A spring element (6) is provided between the valve body element (1) and the valve core element (2), and two ends of the spring element (6) are respectively engaged with the valve body element (1) and the valve core element (2) in a limiting manner.

3. The self-cleaning drainage filter device according to claim 1, characterized in that: A filter screen installation groove (110) is provided in the impurity collection cavity (11), and the filter screen installation groove (110) is positionally engaged with the filter screen element (3).

4. The self-cleaning drainage filter device according to claim 1, characterized in that: The electric drainage connection port (13) is limitedly matched with an external drainage device through an internal thread structure, the gas cylinder connection end (14) and the valve cover connection end (15) are provided with external thread structures, the gas cylinder connection end (14) is limitedly matched with an external gas tank through the external thread structure, and the valve cover connection end (15) is limitedly matched with a valve cover element (4) through the external thread structure.

5. The self-cleaning drainage filter device according to claim 1, characterized in that: The upper and lower ends of the valve cover element (4) are respectively provided with a valve body connecting thread (40) and a backwash outlet (41), the valve body connecting thread (40) is limitedly matched with the valve cover connecting end (15), the valve cover element (4) is sealed and matched with the valve body element (1) through the valve body connecting thread (40) and the lower sealing ring (8), a second sealing ring installation groove (42) is provided between the valve body connecting thread (40) and the backwash outlet (41), and the second sealing ring installation groove (42) is limitedly matched with the lower sealing ring (8).

6. The self-cleaning drainage filter device according to claim 2, characterized in that: The valve body element (1) is provided with a first sealing ring installation groove (16) and a spring installation groove (17) on the inner wall near the air cylinder connection end (14); the first sealing ring installation groove (16) is limitedly matched with an upper sealing ring (5); the spring installation groove (17) is limitedly matched with the spring element (6); a positioning key installation groove (18) is provided on the inner wall of one side of the valve body element (1); the upper limit of the positioning key installation groove (18) is matched with a positioning key element (7); the positioning key element (7) is slidably matched with the valve core element (2).

7. The self-cleaning drainage filter device according to claim 3, characterized in that: The filter element (3) presents a conical structure, with a plurality of filter mesh holes (30) evenly distributed on the filter element (3), and a plurality of fixing buckles (31) evenly arranged on the end of the filter element (3), wherein the fixing buckles (31) are limitedly engaged with the filter installation groove (110).

8. The self-cleaning drainage filter device according to claim 4, characterized in that: The gas cylinder connection end (14) is limitedly engaged with the external gas tank via a fastening nut (9) and an external thread structure, and an interface sealing ring (90) for sealingly engaging with the external gas tank is provided on the fastening nut (9).

9. The self-cleaning drainage filter device according to claim 6, characterized in that: The upper and lower ends of the valve core element (2) are respectively provided with a spring installation cavity (20) and a backwashing sink (21), the spring installation cavity (20) is limitedly matched with the spring element (6), a guide port (22) is provided on one side of the spring installation cavity (20), and a guide groove (23) is provided on one side of the valve core element (2), and the guide groove (23) is slidably matched with the positioning key element (7).

10. The self-cleaning drainage filter device according to claim 9, characterized in that: The diameter of the backwashing sink (21) is 1 mm to 3 mm smaller than the inner diameter of the valve core installation cavity (10).

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