CN206304524U - A kind of combined type air filter - Google Patents

Abstract

A combined air filter, which is composed of an oil-gas separation tube and a filter; the oil-gas separation tube is a square tube with one end open and the other end closed. Vertical baffle; the lower part of the baffle arranged on the lower pipe wall is provided with a through hole, and an oil outlet hole is also provided at the lower part of the open end of the oil-gas separation pipe; the upper pipe wall near the closed end of the oil-gas separation pipe is connected with a fan The housing is provided with a fan inside the fan housing; the filter includes a filter housing arranged on the upper part of the fan housing and communicated with the fan housing, the upper end of the filter housing is covered with a filter cover plate, There are exhaust holes on the side wall of the filter housing; an inner support is arranged inside the filter housing, and a filter screen in a cylindrical structure is provided on the inner support. The upper end of the casing is airtightly connected. The utility model adopts a combined structure, can realize two times of filtering, and has good filtering effect.

Description

A combined air filter

technical field

The utility model relates to an air filter, in particular to a combined air filter.

Background technique

At present, in the existing technical field, air filters are designed using the following five effects: interception effect, inertial effect, diffusion effect, gravity effect and electrostatic effect. However, the design of most air filters only uses one of the principles. This design can meet the needs of some small equipment, such as vehicle engines, etc., but in some occasions it cannot meet the filtration accuracy, or cannot Realize the high efficiency of filtration, causing problems such as waste of resources, such as air filters installed on large industrial machinery.

In large-scale industrial machinery, the working environment is harsh, and the gas composition to be filtered is more complex and diverse, especially it may contain many large particles, so the air filter designed with a single principle, such as an ordinary filter type It is difficult for the air filter to filter it clean, and a large amount of large particles contained in it will easily cause the filter screen to be clogged. This will not only reduce the filtration accuracy, but also require frequent replacement of the filter element, resulting in waste of resources and environmental pollution. .

Chinese patent "CN104131860B" discloses a "labyrinth oil-gas separation chamber equipped with a turbine", which adopts a combined oil-gas filter device with a labyrinth oil-gas separation structure and a filter element, which cannot meet the requirements of fixed industrial machinery used indoors. Requirements for waste gas environmental indicators. The first is that the filter element is set at the front of the labyrinth oil-gas separation structure. For oil and gas containing large-particle pollutants, the large-particle pollutants will cause blockage of the filter element when they first pass through the filter element, reducing the filtering effect and requiring frequent replacement of the filter element. The service life of the device is short and the cost is high; the second is that the baffle of the labyrinth oil-gas separation structure is set horizontally, and the oil-gas passage contains vertical parts, which will cause the condensed oil particles to stay on the baffle, especially when the baffle is used The tooth-shaped structure makes it more difficult for the oil particles to be recovered from the oil return tank; the third is that when the turbine cools the oil and gas, it is difficult to avoid condensed water, and the condensed water is also easy to stay on the baffle when it flows into the labyrinth oil-gas separation structure. It is difficult to discharge, which will have a bad impact on the filtering effect; Fourth, the use angle is very limited, and the installation method of the labyrinth oil-gas separation structure baffle makes the device unable to be installed obliquely, otherwise the cooling and condensed oil particles will easily converge on the baffle and At the corner of the side wall, long-term use will cause a large amount of oil particles to accumulate in this part, which will narrow the air path and affect the filtering effect; fifth, the replacement of the filter requires the device to be completely disassembled, and maintenance is very difficult.

Utility model content

In order to solve the deficiencies in the prior art, the utility model provides a combined air filter suitable for indoor fixed industrial mechanical equipment that can perform layered filtration.

In order to achieve the above object, the concrete scheme that the utility model adopts is:

A combined air filter, consisting of an oil-gas separation pipe and a filter; the oil-gas separation pipe is a square pipe with one end open and the other end closed, and the upper pipe wall and the lower pipe wall near the open end are evenly fixed and connected with Several vertical baffles, and the baffles on the upper pipe wall and the lower pipe wall are arranged alternately in the horizontal direction, and the baffles and the pipe wall of the oil-gas separation pipe form a labyrinth oil-gas separation channel; The lower part of the baffle is also provided with a through hole, and the lower part of the open end of the oil-gas separation pipe is also provided with an oil outlet hole;

The upper pipe wall near the closed end of the oil-gas separation pipe is connected with a fan casing, and a fan is arranged inside the fan casing;

The filter includes a filter housing arranged on the upper part of the fan housing and communicated with the fan housing, the upper end of the filter housing is covered with a filter cover plate, and a row is opened on the side wall of the filter housing. Air holes; an inner bracket is arranged inside the filter housing, and a filter screen with a cylindrical structure is arranged on the inner bracket. The lower end of the filter screen is the air inlet end and is airtightly connected with the upper end of the fan housing. An inner bracket cover for closing the upper end of the filter screen is also arranged on the top.

The length of the baffle is equal to the width of the inner hole of the oil-gas separation pipe.

The through holes in the lower part of the baffle are circular holes with equal diameters, and the axes of all the through holes are collinear.

The lower part of the filter housing is also provided with drainage holes.

The outside of the open end of the oil-gas separation pipe is also fixedly connected with a fixing plate, and a plurality of screw fixing holes are opened on the fixing plate.

The oil outlet direction of the oil outlet hole is towards the open end of the oil-gas separation pipe.

The oil outlet direction of the oil outlet hole is toward the bottom of the oil-gas separation pipe.

The blowing direction of the fan is from bottom to top.

Beneficial effect:

1. The utility model adopts a combined structure, and a labyrinth-type oil-gas separation channel is set in the oil-gas separation pipe. Under the suction of the fan, the exhaust gas first passes through the oil-gas separation channel, and moves up and down in the oil-gas separation channel. Under the action of the blower, the oil and other large particle pollutants are filtered in the first step, and then sent to the filter under the action of the fan for the second step of filtration with the filter screen, and the filtration quality is improved through layered filtration;

2. In the direction of oil and gas flow, the oil and gas separation pipe is located at the front of the filter, and the large particle pollutants are filtered out first, thereby preventing the large particle pollutants from clogging the filter screen, increasing the service life of the filter screen and reducing the filter time. The number of network replacements improves work efficiency;

3. All the baffles are set vertically, no oil particles will stay on the plate surface, and the falling oil particles can be discharged from the oil-gas separation pipe along the through holes and oil outlet holes opened on the lower baffle to avoid depositing on the oil-gas separation pipe The separation effect is affected in the middle, and the whole device can also be used tilted without affecting the effect, and the scope of application is wider;

4. The oil outlet is facing the open end of the oil-gas separation pipe, and the separated oil can be re-sent into the mechanical equipment, which is suitable for the situation where strict leakage prevention is required or waste oil needs to be collected for analysis experiments; the oil outlet can also face oil and gas The bottom of the separation pipe is installed, and the separated oil can be directly recovered for further treatment, which is suitable for the situation where the waste oil is no longer reused and only needs to be purified and discharged;

5. In the filter, the temperature of the exhaust gas is usually still relatively high, which may cause condensed water to appear in the filter housing, and this part of the condensed water can be discharged by opening a drainage hole;

6. In daily maintenance, only need to remove the filter cover and inner support cover to replace the filter screen, which is simple and convenient.

Description of drawings

Figure 1 is a front view of the overall structure;

Figure 2 is a main sectional view of the overall structure;

Fig. 3 is a side sectional view of the overall structure;

Figure 4 is a top view of the overall structure.

Reference signs: 1. Filter housing, 2. Filter cover plate, 3. Vent hole, 4. Drainage hole, 5. Fan housing, 6. Oil-gas separation pipe, 7. Oil outlet hole, 8. Baffle plate, 9, fan, 10, inner support, 11, filter screen, 12, inner support cover, 13, fixed plate.

detailed description

The embodiment of the present utility model is specifically described below according to the accompanying drawings.

Embodiment one.

As shown in Figures 1 to 4, a combined air filter is composed of an oil-gas separation tube 6 and a filter; the oil-gas separation tube 6 is a square tube with one end open and the other end closed, the upper tube wall and the lower tube wall The part close to the open end is evenly and fixedly connected with several vertical baffles 8, and the baffles 8 on the upper pipe wall and the lower pipe wall are arranged alternately in the horizontal direction, and the baffles 8 and the pipe wall of the oil-gas separation pipe 6 It encloses a labyrinth oil-gas separation channel; the lower part of the baffle plate 8 arranged on the lower pipe wall is also provided with a through hole, and the lower part of the open end of the oil-gas separation pipe 6 is also provided with an oil outlet hole 7 . The length of the baffle plate 8 is equal to the width of the oil-gas separation pipe 6 . The through holes at the bottom of the baffle plate 8 are circular holes with equal diameters, and the axes of all the through holes are collinear. All the through holes and the oil outlet hole 7 jointly constitute the oil outlet channel of the oil-gas separation pipe 6 . When in use, the open end of the oil-gas separation pipe 6 is connected to the air outlet of the mechanical equipment for filtering the exhaust gas discharged from the mechanical equipment.

Described oil-gas separation pipe 6 is provided with a threaded hole near the upper pipe wall at the closed end, and fan casing 5 is fixedly arranged above the closed end, and fan casing 5 is tubular and vertically arranged, and its lower end is connected with the threaded hole. The oil-gas separation pipe 6 communicates, and a fan 9 is arranged inside the fan housing 5, and the fan 9 is threadedly connected with the threaded hole, and the air supply direction of the fan 9 is from bottom to top.

Described filter comprises the filter housing 1 that is arranged on fan housing 5 tops and is communicated with fan housing 5, and the upper end of filter filter housing 1 is covered with filter cover plate 2, in filter The side wall of the filter housing 1 is provided with an exhaust hole 3; the inside of the filter housing 1 is provided with an inner bracket 10, and the inner bracket 10 is provided with a filter screen 11 in a cylindrical structure, and the filter screen 11 The lower end is the air inlet end and is airtightly connected with the upper end of the fan housing 5, and the inner support cover 12 for sealing the upper end of the filter screen 11 is also arranged on the inner support 1. The inner bracket 10 only plays a supporting role, so the ventilation area of the inner bracket 10 is enlarged as much as possible without affecting the support, so as to ensure that the filter screen 11 can have a good filtering effect. During implementation, the filter screen 11 can flexibly select different models according to different types of exhaust gas, so as to match the characteristics of the exhaust gas such as flow rate and particle size.

The lower part of the filter housing 1 is also provided with a drainage hole 4 . The air filtered twice is finally discharged from the exhaust hole 3 of the filter. At this time, although the exhaust gas has been filtered, it may still have a relatively high temperature, so the distilled water that may appear on the filter housing 1 must be treated. , by setting the drainage hole 4, so that the distilled water produced can be removed in time, avoid staying in the filter for a long time, and have an impact on the life of the filter.

The outside of the open end of the oil-gas separation pipe 6 is also fixedly connected with a fixing plate 13, and the fixing plate 13 is provided with several screw fixing holes. During implementation, the installation of the combined air filter is realized by pressing the fixing plate 13 on the exhaust port of the equipment and fixing it with bolts.

The oil outlet direction of the oil outlet hole 7 faces the open end of the oil-gas separation pipe 6, so that the separated oil can be re-sent into the mechanical equipment, which is suitable for the situation where strict leakage prevention is required or waste oil needs to be collected for analysis and experiments .

The specific working process is as follows: first, the exhaust gas enters the oil-gas separation pipe 6 under the action of the fan 9, and then moves to the fan 9 at high speed, but under the obstruction of the baffle plate 8, the exhaust gas needs to reciprocate up and down, and in this process, The oil and other large-particle pollutants in the exhaust gas will be blocked on the baffle 8 due to inertia and centrifugal force, so as to achieve the function of filtering, and the filtered oil and other large-particle pollutants can be discharged through the oil outlet 7. discharge. After being filtered for the first time, the exhaust gas passes through the fan 9 and reaches the filter above the fan 9, because the lower end of the cylindrical filter screen 11 is airtightly connected with the upper end of the fan housing 5, and the upper end of the filter screen 11 is covered by the inner bracket. The cover 12 is sealed, so the exhaust gas flows out from the mesh surface of the filter screen 11, thereby being filtered by the filter screen 11. Finally, the filtered exhaust gas is discharged through the exhaust hole 3 . By combining the oil-gas separation pipe 6 and the filter, the dual filtration of exhaust gas is realized, which improves the filtering effect, and the large particles of impurities are filtered in the oil-gas separation pipe 6, so that the filter screen 11 will not be blocked, and the service life of the filter screen 11 can be extended , and reduce real costs.

If the filter screen 11 needs to be cleaned or replaced, just open the filter cover plate 2, then open the inner support cover 12, and the filter screen 11 can be taken out, which is simple and easy.

Embodiment two.

The main structure is the same as the above-mentioned embodiment 1, the difference is that the oil outlet direction of the oil outlet hole 7 is toward the bottom of the oil-gas separation pipe 6, so that the separated oil can be directly recovered for further processing, and it is suitable for waste oil and will not be repeated. Take advantage of situations where only the emissions need to be cleaned.

Claims (8)

1. A combined air filter, characterized in that: it consists of an oil-gas separation tube (6) and a filter; the oil-gas separation tube (6) is a square tube with one end open and the other end closed, the upper tube wall and the lower tube The part of the pipe wall close to the open end is evenly fixed and connected with several vertical baffles (8), and the baffles (8) on the upper pipe wall and the lower pipe wall are arranged alternately in the horizontal direction, and the baffles (8) It forms a labyrinthine oil-gas separation channel with the pipe wall of the oil-gas separation pipe (6); the lower part of the baffle (8) arranged on the lower pipe wall is also provided with a through hole, and the lower part of the open end of the oil-gas separation pipe (6) is also provided with a Oil outlet (7); The upper pipe wall of the oil-gas separation pipe (6) close to the closed end is communicated with a fan casing (5), and a fan (9) is arranged inside the fan casing (5); The filter includes a filter housing (1) arranged on the upper part of the fan housing (5) and communicated with the fan housing (5). The upper end of the filter housing (1) is covered with a filter cover ( 2), there is an exhaust hole (3) on the side wall of the filter housing (1); an inner support (10) is provided inside the filter housing (1), and the inner support (10) is provided with A filter screen (11) in a cylindrical structure, the lower end of the filter screen (11) is the air inlet end and is airtightly connected with the upper end of the fan housing (5), and the inner bracket (10) is also provided with a filter screen (11) inner bracket cover (12) with the upper end closed. 2. A combined air filter according to claim 1, characterized in that: the length of the baffle (8) is equal to the width of the inner hole of the oil-gas separation pipe (6). 3. A combined air filter according to claim 1, characterized in that: the through holes in the lower part of the baffle (8) are round holes with the same diameter, and the axes of all the through holes are collinear. 4. A combined air filter according to claim 1, characterized in that: the lower part of the filter housing (1) is also provided with a drainage hole (4). 5. A combined air filter according to claim 1, characterized in that a fixed plate (13) is fixedly connected to the outside of the open end of the oil-gas separation pipe (6), and the fixed plate (13) is Several screw fixing holes are provided. 6. A combined air filter according to claim 1, characterized in that: the oil outlet direction of the oil outlet hole (7) faces the open end of the oil-air separation pipe (6). 7. A combined air filter according to claim 1, characterized in that: the oil outlet direction of the oil outlet hole (7) is toward the bottom of the oil-air separation pipe (6). 8. A combined air filter according to claim 1, characterized in that: the blowing direction of the fan (9) is from bottom to top.