A natural gas engine air intake device

Abstract

The utility model belongs to air intake filter technical field especially, it is a kind of natural gas engine air intake device, including air intake pipe, box and gas supply pipe, box one end is communicated with air intake pipe, other end is communicated with gas supply pipe, box is equipped with baffle, baffle will box inner chamber divide into first filter cavity and second filter cavity, first filter cavity and second filter cavity both one end are communicated with air intake pipe, other end is communicated with gas supply pipe, and it is equipped with filter piece in first filter cavity and second filter cavity;Box is equipped with the plugboard of detachable position corresponding first filter cavity and second filter cavity, plugboard is set two in the two sides corresponding filter piece, and it is equipped with the assembly hole of filter piece and plugboard for assembling plugboard on box.

Description

Technical Field

[0001] This utility model belongs to the field of air intake filtration technology, and in particular relates to an air intake device for a natural gas engine. Background Technology

[0002] Natural gas engines, as clean and efficient power devices, are increasingly widely used in distributed energy, vehicle power, ship propulsion, and oil and gas field drilling and production. Their working principle is as follows: natural gas and air mix in the cylinder and are ignited by a spark plug. The heat released from combustion drives the piston to do work, thus outputting power. To achieve efficient combustion and low emissions across all operating conditions, the airflow, pressure, temperature, and cleanliness entering the cylinder must be precisely controlled. Therefore, natural gas engines are equipped with an intake system. Air passes through a filter, is pressurized by a turbocharger, and cooled by an intercooler before entering the cylinder through the throttle valve. The ECU adjusts the throttle opening, boost pressure, and EGR rate in real time based on parameters such as engine speed, load, ambient temperature, humidity, and atmospheric pressure to ensure the air-fuel ratio is always within the optimal range.

[0003] Among them, the filter is a key component to ensure the long-term reliable operation of the engine. Its function is to filter out solid particles such as dust, pollen, sand, carbon black, and industrial dust from the atmosphere, preventing abrasive wear, scratches, or jamming of precision moving parts such as cylinders, pistons, piston rings, valves, and turbocharger compressor blades. In existing technologies, natural gas engines generally use replaceable paper filters, non-woven fabric filters, or oil bath-paper composite filters. These filters achieve solid-gas separation through "deep filtration" or "surface filtration" mechanisms. However, with the increase of operating time, particles accumulate on the surface and internal pores of the filter material, resulting in a reduction in flow area and an increase in permeation resistance. This manifests as local blockage of the filter element, affecting the intake air volume of the natural gas engine. Regular shutdowns for maintenance and replacement of the filter element are required. However, the replacement and maintenance of the filter element in existing filters is relatively inconvenient, affecting the maintenance and operating efficiency of natural gas engines. Utility Model Content

[0004] In view of this, the present invention aims to provide a natural gas engine intake device to solve the problem of inconvenient replacement and maintenance of filter elements in existing filters, which affects the maintenance and operating efficiency of natural gas engines.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A natural gas engine intake device includes an intake pipe, a housing, and a supply pipe. One end of the housing is connected to the intake pipe, and the other end is connected to the supply pipe. A partition is provided inside the housing, dividing the inner cavity of the housing into a first filter chamber and a second filter chamber. Both the first and second filter chambers are connected to the intake pipe at one end and to the supply pipe at the other end. Each of the first and second filter chambers contains a filter element. A detachable insert plate is provided on the housing corresponding to the positions of the first and second filter chambers. Two insert plates are provided on each side of the filter element. The housing has mounting holes for assembling the insert plates and the filter elements, and these mounting holes communicate with the housing. One end of the insert plate extending into the inner cavity of the housing can be inserted into the partition plate. A detachable sealing element is provided on the housing corresponding to the mounting holes.

[0006] Furthermore, the device also includes a backflush pipe, one end of which is fixed to the partition plate and the other end extends out of the housing. Air jet holes are provided on the backflush pipe at positions corresponding to both sides of the filter element.

[0007] Furthermore, the filter element includes a coarse filter element and a fine filter element, which are spaced apart on the partition. There is an air gap between the coarse filter element and the fine filter element that communicates with the jet hole, and the air gap communicates with the assembly hole.

[0008] Furthermore, multiple backflush air pipes are provided at intervals.

[0009] Furthermore, the filter element is detachably mounted on the partition or the housing.

[0010] Furthermore, the sealing element is provided with a sealing block that can cooperate with the filter element. One end of the sealing block is fixed to the sealing element, and the other end can abut against the filter element.

[0011] Furthermore, the sealing element includes a first sealing element and a second sealing element, which are located on both sides of the filter element, respectively.

[0012] Furthermore, the inner wall of the box and the partition are provided with slots that can cooperate with the insert plate.

[0013] Furthermore, the edge of the insert plate is provided with a seal that can mate with the slot.

[0014] Furthermore, the seal is made of rubber.

[0015] Compared with the prior art, the natural gas engine intake device of this utility model has the following advantages: The natural gas engine intake device described in this utility model has the advantages of easy assembly and maintenance. The partition inside the housing can divide the housing into a first filter chamber and a second filter chamber. The filter elements installed in the first filter chamber and the second filter chamber can be replaced and maintained individually. When replacing or maintaining the filter element in one filter chamber, the insertion plate can be used to connect with the slot of the partition to isolate the filter chamber. This not only ensures that foreign objects generated during the maintenance of the filter element do not easily enter the gas supply pipe, which is beneficial to improving the filtration effect after maintenance of this intake device, but also ensures that when the filter element in one filter chamber is replaced or cleaned, the filter element in the other filter chamber can continue to perform the filtration function to maintain the stable gas supply of the natural gas engine. This is beneficial to realize short-stop maintenance or non-stop maintenance of this intake device, reducing the impact of maintenance of this intake device on the operation of the natural gas engine. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a schematic diagram of the structure of a natural gas engine intake device according to an embodiment of the present utility model; Figure 2 This is a structural schematic diagram of a natural gas engine intake device during maintenance, as described in an embodiment of this utility model. Figure 3 This is a schematic diagram of the structure of a natural gas engine intake device with a sealing component installed in the housing, as described in an embodiment of this utility model. Figure 4 for Figure 3 Exploded view; Figure 5 This is a schematic diagram of the structure of a natural gas engine intake device with an insert plate installed on the housing, as described in an embodiment of this utility model. Figure 6 This is a schematic diagram of the structure of the housing in a natural gas engine intake device according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the insert plate in a natural gas engine intake device according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Inlet pipe; 2. Housing; 3. Air supply pipe; 4. Backflush pipe; 5. First sealing element; 6. Second sealing element; 7. Coarse filter element; 8. Slot; 9. Partition plate; 10. Sealing block; 11. Ventilation gap; 12. Insert plate; 13. Jet nozzle; 14. First filter chamber; 15. Second filter chamber; 16. Sealing element; 17. Fine filter element. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] A natural gas engine intake device, such as Figures 1 to 7As shown, the device includes an air inlet pipe 1, a housing 2, and an air supply pipe 3. One end of the housing 2 is connected to the air inlet pipe 1, and the other end is connected to the air supply pipe 3. A partition 9 is provided inside the housing 2, which divides the inner cavity of the housing 2 into a first filter chamber 14 and a second filter chamber 15. Both the first filter chamber 14 and the second filter chamber 15 are connected to the air inlet pipe 1 at one end and to the air supply pipe 3 at the other end. Filter elements are provided in both the first filter chamber 14 and the second filter chamber 15. Removable insert plates 12 are provided on the housing 2 at positions corresponding to the first filter chamber 14 and the second filter chamber 15. Two insert plates 12 are provided on both sides of the filter elements. The housing 2 has assembly holes for assembling the insert plates 12 and the filter elements. The assembly holes are connected to the housing 2. One end of the insert plate 12 extends into the inner cavity of the housing 2 and can be inserted and engaged with the partition 9. Removable sealing elements are provided on the housing 2 at positions corresponding to the assembly holes.

[0023] Specifically, the air intake pipe 1 and the housing 2, as well as the air supply pipe 3 and the housing 2, are fixedly connected, for example, by welding or screw connection. The partition 9 is fixed to the housing 2, and the sealing component can be installed and fixed to the housing 2 by screws, allowing for detachable installation of the sealing component on the housing 2. Furthermore, by setting two insert plates 12 on each side corresponding to the filter element, the two insert plates 12 can respectively seal the air intake pipe 1 and the air supply pipe 3, thereby isolating the first filter chamber 14 or the second filter chamber 15 from the overall air path of the air intake device. This facilitates the replacement and maintenance of the filter element in the first filter chamber 14 or the second filter chamber 15 and prevents foreign objects from entering the air intake pipe 1 or the air supply pipe 3 during filter element replacement and maintenance.

[0024] Using the above configuration, the partition 9 divides the housing 2 into a first filter chamber 14 and a second filter chamber 15. The filter elements installed in the first filter chamber 14 and the second filter chamber 15 can achieve dual-path filtration. When the filter elements in the housing 2 need to be replaced or maintained, only the sealing part of the corresponding mounting hole of any filter chamber needs to be removed. Then, the insert plate 12 is inserted into the mounting hole. The insert plate 12 and the partition 9 are used to isolate the filter chamber from the air intake pipe 1 and the air supply pipe 3. This ensures that when the filter element in one filter chamber is replaced or cleaned, the filter element in the other filter chamber can continue to perform the filtering function to maintain the stable gas supply of the natural gas engine. This is beneficial for short-stop maintenance or non-stop maintenance of this air intake device and reduces the impact of such air intake device maintenance on the operation of the natural gas engine.

[0025] In a preferred embodiment of this invention, the device further includes a backflush pipe 4, one end of which is fixed to the partition 9 and the other end extends out of the housing 2. Air jet holes 13 are provided on the backflush pipe 4 at positions corresponding to both sides of the filter element.

[0026] In actual use, the backflush pipe 4 can be connected to an external air supply device, such as a compressor. The external air supply device can be used to input high-pressure gas into the backflush pipe 4 or to provide pulsed air supply, so that the high-pressure gas can blow off the blockages on the surface of the filter element, thereby cleaning and maintaining the filter element, which helps to improve the service life of the filter element and reduce the use and maintenance costs of the filter element.

[0027] In a preferred embodiment of this example, the filter element includes a coarse filter element 7 and a fine filter element 17, which are spaced apart on the partition plate 9. There is a ventilation gap 11 between the coarse filter element 7 and the fine filter element 17 that communicates with the jet hole 13, and the ventilation gap 11 communicates with the assembly hole.

[0028] For example, the coarse filter element 7 can be a filter screen, etc., and the fine filter element 17 can be a paper filter element, non-woven fabric filter element, etc. The coarse filter element 7 is positioned relatively close to the air inlet pipe 1, and the fine filter element 17 is positioned relatively close to the air supply pipe 3. Two insert plates 12 are provided accordingly. The two insert plates 12 can be inserted between the coarse filter element 7 and the air inlet pipe 1, and between the fine filter element 17 and the air supply pipe 3, respectively, to achieve isolation between the filter chamber and the air inlet pipe 1, and between the filter chamber and the air supply pipe 3.

[0029] In practical applications, by using the coarse filter element 7 and the fine filter element 17 together, two-stage filtration of the air intake through the intake pipe 1 can be achieved, which is beneficial to improving the filtration effect of this intake device and extending the service life of the fine filter element 17.

[0030] Using the above setup, after removing the sealing component and installing the insert plate 12, high-pressure gas can be input into the backflush pipe 4 using an external air supply device. The high-pressure gas is ejected through the jet hole 13 and can purge both sides of the coarse filter 7 and both sides of the fine filter 17, blowing the blockages on the coarse filter 7 and the fine filter 17 toward the assembly hole until the blockages are discharged through the assembly hole. This not only effectively cleans the coarse filter 7 and the fine filter 17, but also prevents foreign objects from remaining in the housing 2, ensuring the filtration effect after maintenance of this air intake device.

[0031] In a preferred embodiment of this invention, multiple backflush air pipes 4 are spaced apart, and each backflush air pipe 4 is provided with multiple jet holes 13. The jet holes 13 are positioned between one insert plate 12 and the coarse filter 7, another insert plate 12 and the fine filter 17, and between the coarse filter 7 and the fine filter 17. Each backflush air pipe 4 is connected to a main pipe, which extends out of the housing 2 and connects to an external air supply device to supply air to the multiple backflush air pipes 4. The partition plate 9 can be provided with mounting holes for installing the backflush air pipes 4. Corresponding to the mounting holes, the partition plate 9 has through holes communicating with the jet holes 13. The through holes and mounting holes are connected in a one-to-one correspondence, and those skilled in the art can also choose other methods to install the backflush air pipes 4 according to actual needs, as long as the backflush air pipes 4 can be fixedly installed on the partition plate 9.

[0032] Using the above configuration, the multiple backflush pipes 4 spaced apart can cover a larger area, which is beneficial to improving the cleaning effect on the surface of the filter element.

[0033] In a preferred embodiment of this invention, the filter element is detachably mounted on the partition 9 or the housing 2. Specifically, the filter element can be detachably mounted on the partition 9 or the housing 2 by means of screws, snap-fits, or other methods.

[0034] Using the above-mentioned setup, the filter element can be easily installed on the partition 9 or the housing 2. This not only improves the stability of the filter element after installation and ensures that the filter element can continuously and stably perform its filtering function, but also facilitates the subsequent replacement of the filter element. When the filter element still cannot meet the usage requirements after purging and cleaning, the operator can easily disassemble and replace the filter element, reducing the maintenance and assembly difficulty of this air intake device.

[0035] In a preferred embodiment of this invention, the sealing member is provided with a sealing block 10 that can cooperate with the filter element. One end of the sealing block 10 is fixed to the sealing member, and the other end can abut against the filter element. Specifically, the sealing block 10 can be made of materials such as rubber or silicone, and is fixed to the sealing member by means of adhesives, screws, etc. By abutting and adhering the end face of the sealing block 10 against the side wall of the filter element, a seal can be achieved between the sealing member and the filter element.

[0036] Using the above-described configuration, the sealing block 10 on the sealing component can provide a good seal at the joint between the sealing component and the filter component, preventing foreign objects from passing through and thus ensuring the continuous filtration effect of this air intake device.

[0037] In a preferred embodiment of this example, the sealing element includes a first sealing element 5 and a second sealing element 6, which are located on opposite sides of the filter element. The first sealing element 5 corresponds to the coarse filter element 7 and has a sealing block 10 that mates with the coarse filter element 7. The second sealing element 6 corresponds to the fine filter element 17 and also has a sealing block 10 that mates with the fine filter element 17. A ventilation gap 11 is provided at the joint between the first sealing element 5 and the second sealing element 6.

[0038] It should be noted that sealing rings, sealing strips, and other sealing structures can be installed at the joints of the first sealing component 5 and the second sealing component 6, the joints of the first sealing component 5 and the housing 2, and the joints of the second sealing component 6 and the housing 2, as needed, to ensure the overall sealing performance of the housing 2 when the sealing component seals the assembly hole, and to prevent external gas from entering the gas supply pipe 3 directly without being filtered by the filter.

[0039] Using the above setup, when the filter needs cleaning and maintenance, the second sealing member 6 can be removed first, and then the insert plate 12 can be installed between the fine filter 17 and the air supply pipe 3. The insert plate 12 separates the first filter chamber 14 and the air supply pipe 3, or separates the second filter chamber 15 and the air supply pipe 3. At this time, since the first sealing member 5 still blocks the coarse filter 7 and the air inlet pipe 1, the blockage between the coarse filter 7 and the air inlet pipe 1 will not fly out of the assembly hole, which helps to reduce the probability of foreign objects entering the air supply pipe 3 when the sealing member is removed.

[0040] In a preferred embodiment of this invention, both the inner wall of the housing 2 and the partition 9 are provided with slots 8 that can mate with the insert plate 12. Specifically, the insert plate 12 is provided with a handle or handle groove to facilitate the operator in loading and unloading the insert plate 12.

[0041] Using the above configuration, the slot 8 can stably cooperate with the insert plate 12 and play a good limiting role for the insert plate 12, ensuring that the insert plate 12 remains stable after installation. This is conducive to the insert plate 12 continuously and stably blocking the corresponding air inlet pipe 1 or air supply pipe 3, thereby achieving isolation of the first filter chamber 14 or the second filter chamber 15.

[0042] In a preferred embodiment of this invention, the edge of the insert plate 12 is provided with a sealing element 16 that can mate with the slot 8. Specifically, the sealing element 16 is made of rubber and can be fixed to the insert plate 12 by means of screws, adhesives, etc.

[0043] Using the above-mentioned configuration, and taking advantage of the elastic deformation properties of the seal 16, the seal 16 can provide a good seal at the mating point between the insert plate 12 and the slot 8, thereby ensuring that foreign objects will not enter the air supply pipe 3 when the filter element in any filter chamber is maintained or replaced. This allows the air entering through the air inlet pipe 1 to still be filtered by the filter element in another filter chamber, ensuring that the air entering the air supply pipe 3 is all filtered clean air.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A natural gas engine air intake device, characterized in that: The device includes an air inlet pipe (1), a housing (2), and an air supply pipe (3). One end of the housing (2) is connected to the air inlet pipe (1), and the other end is connected to the air supply pipe (3). A partition (9) is provided inside the housing (2), which divides the inner cavity of the housing (2) into a first filter chamber (14) and a second filter chamber (15). Both the first filter chamber (14) and the second filter chamber (15) are connected to the air inlet pipe (1) at one end and to the air supply pipe (3) at the other end. Both the first filter chamber (14) and the second filter chamber (15) are equipped with... Filter element; The housing (2) is provided with detachable insert plates (12) at positions corresponding to the first filter chamber (14) and the second filter chamber (15). Two insert plates (12) are provided on both sides of the filter element. The housing (2) is provided with assembly holes for assembling the insert plates (12) and the filter element. The assembly holes are connected to the housing (2). One end of the insert plate (12) extending into the inner cavity of the housing (2) can be inserted and cooperated with the partition plate (9). The housing (2) is provided with detachable sealing elements at positions corresponding to the assembly holes.

2. The natural gas engine intake device according to claim 1, characterized in that: The device also includes a backflush pipe (4), one end of which is fixed to the partition plate (9) and the other end extends out of the housing (2). Air jet holes (13) are provided on the backflush pipe (4) at positions corresponding to both sides of the filter element.

3. The natural gas engine intake device according to claim 2, characterized in that: The filter element includes a coarse filter element (7) and a fine filter element (17). The coarse filter element (7) and the fine filter element (17) are spaced apart on the partition plate (9). There is a ventilation gap (11) between the coarse filter element (7) and the fine filter element (17) that communicates with the jet hole (13). The ventilation gap (11) communicates with the assembly hole.

4. A natural gas engine intake device according to claim 2, characterized in that: Multiple backflush pipes (4) are provided at intervals.

5. A natural gas engine intake device according to claim 1, characterized in that: The filter element is detachably mounted on the partition (9) or the housing (2).

6. A natural gas engine intake device according to claim 1, characterized in that: The sealing element is provided with a sealing block (10) that can cooperate with the filter element. One end of the sealing block (10) is fixed on the sealing element, and the other end can abut against the filter element.

7. A natural gas engine intake device according to claim 6, characterized in that: The sealing element includes a first sealing element (5) and a second sealing element (6), with the first sealing element (5) and the second sealing element (6) located on both sides of the filter element, respectively.

8. A natural gas engine intake device according to claim 1, characterized in that: The inner wall of the box (2) and the partition (9) are provided with slots (8) that can cooperate with the insert plate (12).

9. A natural gas engine intake device according to claim 8, characterized in that: The edge of the insert plate (12) is provided with a seal (16) that can cooperate with the slot (8).

10. A natural gas engine intake device according to claim 9, characterized in that: The seal (16) is made of rubber.

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