Internal-separated exhaust filter for vacuum pump

Abstract

The internally-separated exhaust filter comprises a shell and a plurality of filter elements located in the shell, an air inlet cover plate is arranged at the end of the shell, an air inlet is formed in the air inlet cover plate, an exhaust port is formed in the top face of the shell, a partition plate is arranged in the shell, and the filter elements are arranged in the partition plate. A partition plate is arranged in the shell and divides the shell into an upper cavity and a lower cavity, the filter element is located in the upper cavity, a plurality of heat dissipation ribs are arranged in the lower cavity, a vertical baffle is arranged at the end of the air inlet cover plate, a vent hole is formed in the bottom of the vertical baffle, the air inlet is located above the vent hole, and the air outlet is located above the vent hole. And the vent hole is positioned below the partition plate and the upper cavity. The vertical baffle of the internally-separated exhaust filter for the vacuum pump can prevent exhaust airflow from directly impacting the filter element, so that the filter element is prevented from vibrating; and meanwhile, the vertical baffle can play roles of buffering, adsorbing and the like on the exhaust airflow, the oil content in the exhaust airflow is reduced, and the workload of the filter element is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of vacuum pumps and relates to an exhaust filter for a vacuum pump with an internal partition. Background Art

[0002] When a vacuum pump operates, lubricating oil is used. The lubricating oil can not only increase the lubricating effect but also has a sealing function, which plays a key role in improving the vacuum degree of the vacuum pump. However, as the temperature of the vacuum pump rises and the vacuum pump continues to operate, the lubricating oil will continuously vaporize and liquefy in small amounts, generating oil fumes and oil liquids. The oil fumes and oil liquids are mixed in the exhaust of the vacuum pump and discharged, thus polluting the indoor air. In the prior art, filters are usually set to filter substances such as oil liquids and oil fumes. These substances either have too small particle sizes or have no fixed shapes, so the filtering form is not mainly by blocking but mainly by adsorption of the filter element. For example, the structure in the patent with the application number "201520764750.6" and the name "Filter Element at the Exhaust Port of a Vacuum Pump". In the above prior art, when the exhaust gas flow enters, it directly impacts the filter element, easily causing the filter element to vibrate and be damaged, resulting in a short service life of the filter element. At the same time, after the oil liquid is discharged, it directly contacts the filter element, increasing the working burden of the filter element and leading to poor filtering effect. Summary of the Invention

[0003] The purpose of the present invention is to provide an exhaust filter for a vacuum pump with an internal partition that avoids the direct impact of the exhaust gas flow on the filter element for the above problems existing in the prior art.

[0004] The purpose of the present invention can be achieved by the following technical solutions: An exhaust filter for a vacuum pump with an internal partition includes a housing and a plurality of filter elements located inside the housing. An intake cover plate is provided at the end of the housing, and an intake port is formed on the intake cover plate. An exhaust port is formed on the top surface of the housing. A partition plate is provided inside the housing, and the partition plate divides the housing into an upper cavity and a lower cavity. The filter elements are located in the upper cavity, and a plurality of heat dissipation ribs are provided in the lower cavity. A vertical baffle is formed at the end of the intake cover plate, and a ventilation hole is formed at the bottom of the vertical baffle. The intake port is located above the ventilation hole, and the ventilation hole is located below the partition plate and the upper cavity.

[0005] In the above exhaust filter for a vacuum pump with an internal partition, a horizontal baffle protrudes from the end of the partition plate, and the horizontal baffle is located above the ventilation hole.

[0006] In the above exhaust filter for a vacuum pump with an internal partition, the end of the horizontal baffle is bent upward to form a retaining edge, and diversion notches are formed at both ends of the retaining edge. The refluxed oil liquid flows through the horizontal baffle and is blocked by the retaining edge. The oil liquid accumulated on the horizontal baffle flows out through the diversion notches and flows back along the inner wall of the housing.

[0007] In the above-mentioned internally partitioned exhaust filter for a vacuum pump, one end of the housing close to the intake cover plate is an open end, the bottom surface of the lower cavity is inclined, and the lower part of the bottom surface of the lower cavity is located at the open end.

[0008] In the above-mentioned internally partitioned exhaust filter for a vacuum pump, a housing groove is formed at the bottom of the housing, the top surface of the housing groove is inclined, a base is fixed to the bottom of the housing, and a sealing ring is used to seal between the bottom of the housing and the base, so that the housing groove forms a sealed partition layer. An inlet and an outlet communicating with the partition layer are formed on the housing. The height of the outlet is higher than that of the inlet. A number of first partition plates and a number of second partition plates are respectively arranged on two opposite side walls of the housing groove. The first partition plates and the second partition plates are arranged along a direction perpendicular to the inclined direction of the top surface of the housing groove. The first partition plates and the second partition plates are parallel to each other and evenly arranged in the housing groove. There are flow gaps between the ends of the first partition plates, the ends of the second partition plates and the side walls of the housing groove. The first partition plates and the second partition plates are arranged in a relatively crosswise manner. The first partition plates and the second partition plates form a curved flow path in the partition layer into which water is introduced.

[0009] In the above-mentioned internally partitioned exhaust filter for a vacuum pump, four oil accumulating grooves are formed on the base.

[0010] In the above-mentioned internally partitioned exhaust filter for a vacuum pump, the partition plate serves as the bottom surface of the upper cavity. The partition plate is horizontally inclined, and the lowest part of the partition plate is recessed to form an oil storage groove, and a floating valve is arranged in the oil storage groove.

[0011] In the above-mentioned internally partitioned exhaust filter for a vacuum pump, the floating valve includes a floating valve body and a float. A through hole is formed on the floating valve body. A second sealing ring for sealing between the floating valve body and the oil storage groove is sleeved on the floating valve body. A sealing plug is arranged on the float. The sealing plug is threadedly installed on the float. The end surface of the sealing plug exposes the float and serves as a sealing surface. A connecting part is arranged on the side surface of the floating valve body. The float is hinged to the connecting part through a pin shaft. The float can rotate relative to the floating valve body. When the sealing surface is closely attached to the end of the through hole, the floating valve is in a closed state; when the sealing surface is separated from the through hole, the floating valve is in an open state.

[0012] In the above-mentioned internally partitioned exhaust filter for a vacuum pump, the heat dissipation ribs are perpendicular to the opening end surface of the housing, and the direction of the heat dissipation ribs is consistent with the air flow direction.

[0013] In the above-mentioned internally partitioned exhaust filter for a vacuum pump, an oil return hole and a sewage discharge hole are formed on the side surface of the lower cavity, and the height of the oil return hole is higher than the bottom surface of the lower cavity.

[0014] Compared with the prior art, the exhaust gas flow of the internally partitioned exhaust filter for a vacuum pump enters the intake cover plate through the intake port. The vertical baffle can prevent the exhaust gas flow from directly impacting the filter element and avoid the vibration of the filter element. At the same time, the vertical baffle can buffer and adsorb the exhaust gas flow, reduce the oil content in the exhaust gas flow, and reduce the working burden of the filter element. Then, the exhaust gas flow enters the shell through the ventilation hole. The horizontal baffle reduces the exhaust gas flow flowing directly upward, makes the exhaust gas flow contact the lower cavity, and improves the buffering effect and cooling effect of the lower cavity. The heat dissipation ribs in the lower cavity increase the heat exchange area, improve the cooling or heating efficiency. At the same time, the heat dissipation ribs play a role in dividing the gas flow, reducing the impact force of the gas flow, and increasing the number of collisions and contact area with the gas flow, improving the capture effect of the oil contained in the exhaust gas flow, thereby improving the oil filtration effect and being beneficial to reducing oil and gas emissions. The refluxed oil flows through the horizontal baffle and is blocked by the baffle edge. The oil accumulated on the horizontal baffle flows out through the diversion notch and returns along the inner wall of the shell, avoiding secondary entrainment of the exhaust gas flow. The bottom surface of the lower cavity is inclined, and the lower part of the bottom surface of the lower cavity is located at the open end, so as to facilitate the cleaning and sewage discharge of the lower cavity. At the same time, the depth of the oil at the bottom of the open end of the shell is increased to ensure the buffering effect. The first partition and the second partition form a curved flow channel in the water-filled partition layer, avoiding local dead water and increasing the heat exchange area at the same time. The top surface of the shell groove is inclined, that is, the top surface of the water-filled partition layer is inclined. The first partition and the second partition are arranged along the direction perpendicular to the inclination direction of the top surface of the shell groove, so that all the gas in the partition layer can be discharged, avoiding local air bubbling at the top of the water-filled partition layer, and effectively ensuring the heat dissipation effect of the top surface of the partition layer. Description of the Drawings

[0015] Figure 1 is a schematic cross-sectional structure diagram of the internally partitioned exhaust filter for a vacuum pump.

[0016] Figure 2 is another schematic cross-sectional structure diagram of the internally partitioned exhaust filter for a vacuum pump.

[0017] Figure 3 is Figure 2 an enlarged structure diagram of part A in

[0018] Figure 4 is an exploded structure diagram of the internally partitioned exhaust filter for a vacuum pump.

[0019] Figure 5 is a schematic three-dimensional structure diagram of the internally partitioned exhaust filter for a vacuum pump with the installation cover plate and the intake cover plate hidden.

[0020] Figure 6 It is a schematic three-dimensional structure diagram of the exhaust filter for a vacuum pump with an internal partition after hiding the base.

[0021] Figure 7 It is a schematic arrangement structure diagram of multi-layer filter elements in the prior art.

[0022] Figure 8 It is a schematic cross-sectional structure diagram of the floating valve in the closed state in the exhaust filter for a vacuum pump with an internal partition.

[0023] Figure 9 It is a schematic cross-sectional structure diagram of the floating valve in the open state in the exhaust filter for a vacuum pump with an internal partition.

[0024] In the figure, 1. housing; 101. exhaust port; 102. horizontal baffle; 103. edge stop; 104. diversion notch; 105. housing groove; 106. first partition; 107. water inlet; 108. water outlet; 109. heat dissipation rib; 110. oil return hole; 111. sewage discharge hole; 112. second partition; 2. partition plate; 21. oil storage tank; 22. floating valve; 221. floating valve body; 222. float; 223. second sealing ring; 224. sealing plug; 225. connecting part; 226. pin shaft; 227. sealing surface; 228. through hole; 229. hexagonal hole; 3. filter element; 31. inlet pipe cap; 32. tail end pipe cap; 33. first sealing ring; 34. overflow valve; 341. valve body; 342. valve plate; 343. sealing gasket; 344. snap ring; 345. first spring; 346. air flow through hole; 347. positioning flange; 35. gland; 351. air outlet; 36. second spring; 37. mounting nut; 4. support plate; 5. first mounting plate; 6. second mounting plate; 7. mounting cover plate; 8. intake cover plate; 81. intake port; 82. vertical baffle; 83. ventilation hole; 9. base; 91. oil accumulation tank. Detailed implementation manners

[0025] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0026] As Figures 1-9As shown in the figure, the exhaust filter for a vacuum pump with an internal partition includes a housing 1 and a plurality of filter elements 3 located inside the housing 1. Installation covers 7 and an intake cover 8 are respectively provided at both ends of the housing 1. An intake port 81 is formed on the intake cover 8, and an exhaust port 101 is formed on the top surface of the housing 1. A partition plate 2 is provided inside the housing 1, and the partition plate 2 divides the housing 1 into an upper cavity and a lower cavity. The filter elements 3 are horizontally installed inside the housing 1, and a tray 4 for receiving oil is provided directly below each filter element 3. All the filter elements 3 are vertically and multi-layered in several rows and several columns in the upper cavity. In the prior art, the upper and lower layers of the multi-layer filter elements are stagger-mounted and cannot be vertically aligned, and at most only two layers can be arranged; otherwise, as Figure 7 shown in the three-layer arrangement in, the oil discharged from the filter element in the uppermost layer will drip onto the filter element in the lowermost layer, affecting the filtering effect of the lowermost filter element. In severe cases, the lowermost filter element will not be able to work. In the present invention, the tray 4 located directly below the filter element 3 receives the oil flowing out of the filter element 3, solves the problem that the oil in the upper filter element flows back and affects the lower filter element, avoids the oil affecting the normal operation of the lower filter element 3, enables the filter element 3 to be vertically aligned and installed, improves the utility of the vertical multi-layer filter element design, reduces the horizontal distance between the filter elements 3, and greatly increases the number of filter elements 3 that can be arranged; at the same time, it avoids the contact between the oil flowing back from the filter element 3 and the air flow, preventing the oil from being re-entrained. There are a total of twelve filter elements 3 in this application, and the twelve filter elements 3 are arranged in three rows and four columns in the upper cavity.

[0027] In the above technical solution: the length of the filter element 3 is much greater than the outer diameter of the end face of the filter element 3, making the filter element 3 slender. At the same time, the setting of the tray 4 realizes the vertical multi-layer arrangement of the small-sized filter elements 3. Under the same installation size, the small-diameter filter elements 3 after vertical multi-layer arrangement have a longer circumference, that is, a larger filtering area, compared with the existing large-diameter filter elements, improving the space utilization rate. At the same time, the total material consumption of the small-diameter filter elements 3 is more, and the strength is higher, enabling the filter element 3 to withstand a large internal and external pressure difference, which is beneficial to improving the filtering effect and extending the service life of the filter element 3. The oil in the filter element is retained due to the adsorption of the filter element. The oil will occupy the adsorption area of the filter element. Assuming that the filtering effect of the filter element is uniform, then the average formation of the oil adsorbed during filtering in the filter element should be 1 / 4 of the circumference. In the prior art, the large-diameter filter element has a large oil travel distance and a long time, and the amount of oil retained in the filter element is large. Correspondingly, the occupancy rate of the effective adsorption area of the filter element is high, and the filtering effect of the filter element drops significantly; the small-diameter filter element has a small oil travel distance, the oil in the filter element 3 is discharged in a short time, the amount of oil retained in the filter element is small, and the occupancy rate of the effective adsorption area of the corresponding filter element is low, and the filtering effect of the filter element does not drop significantly, which is beneficial to improving the filtering efficiency. The small-diameter filter element 3 is light in weight, which is convenient for installation and replacement.

[0028] In the above technical solution: such as Figure 2As shown, the filter element 3 is horizontally and obliquely installed in the upper cavity, and the support plate 4 is also horizontally and obliquely installed in the upper cavity. The horizontal installation of the filter element 3 can reduce the travel of the oil in the filter element 3, reduce the retention of the oil in the filter element 3, facilitate the discharge of the oil in the filter element 3, and maintain the filtering effect of the filter element 3. The inclined installation of the filter element 3 can make the oil on the inner hole surface of the filter element 3 flow downward and discharge from the filter element 3, avoid the accumulation of liquid on the inner hole surface of the filter element 3, facilitate the improvement of the effective filtering area of the filter element 3, improve the filtering effect, and extend the service life of the filter element 3. The horizontally and obliquely installed support plate 4 can guide the oil to the side wall of the housing 1, avoid the oil spilling onto the surface of the lower filter element, and reduce the contact between the oil and the air flow, avoiding the oil being re-entrained by the air flow.

[0029] In the above technical solution: the first mounting plate 5 and the second mounting plate 6 are respectively provided at both ends of the upper cavity. Both ends of the support plate 4 are respectively fixed on the first mounting plate 5 and the second mounting plate 6 by fasteners. The support plate 4 can be used as a slideway when installing the filter element 3, so that the filter element 3 can be accurately installed without sight. A number of first through holes are made on the first mounting plate 5, and a number of second through holes are made on the second mounting plate 6. An air inlet pipe cap 31 is provided in the first through hole, and one end of the filter element 3 is installed in the first through hole through the air inlet pipe cap 31, and a first sealing ring 33 is sleeved on the air inlet pipe cap 31. The inner hole diameter of the air inlet pipe cap 31 ≥ the inner hole diameter of the filter element 3, which is beneficial to the discharge of the oil in the filter element 3 and avoids liquid accumulation. A tail end pipe cap 32 is provided in the second through hole, and the other end of the filter element 3 is installed in the second through hole through the tail end pipe cap 32. Both ends of the filter element 3 are respectively installed through the air inlet pipe cap 31 and the tail end pipe cap 32, so that each filter element 3 can be horizontally disassembled and assembled separately, and the defective filter element in the multi-layer filter element 3 columnar structure can be replaced separately.

[0030] In the above technical solution: an installation nut 37 is fixed on the tail end pipe cap 32, and a relief valve 34 is threadedly installed on the installation nut 37. A through hole communicating with the relief valve 34 is made on the tail end pipe cap 32. The relief valve 34 is installed at the tail end of the filter element 3 and automatically opens when the pressure in the filter element 3 exceeds the standard, avoiding overpressure damage of the filter element 3. The magnitude of the internal and external pressure difference during the operation of the filter element 3 is an important basis for judging whether the filter element 3 is normal. The working pressure of the relief valve 34 is unified, and the working state of the relief valve 34 can be used as a sign for judging whether the filter element 3 is abnormal, which is convenient for the inspection and maintenance of the filter element 3. The relief valve 34 can adopt standard parts on the market, providing a standard judgment basis, which is convenient for the inspection and replacement of the relief valve 34.

[0031] In the above technical solution: The overflow valve 34 includes a valve body 341, a valve disc 342, a gasket 343, a snap ring 344, and a first spring 345. An installation cavity is provided inside the valve body 341. The valve body 341 is provided with a number of air circulation holes 346 communicating with the installation cavity. A first installation step and a second installation step are respectively provided at both ends of the installation cavity. The gasket 343, the valve disc 342, and the first spring 345 are all movably located inside the installation cavity. The gasket 343 and the valve disc 342 are connected in an "I" shape. The two ends of the first spring 345 are respectively abutted against the first installation step and the valve disc 342, and at the same time, the gasket 343 is in contact with the second installation step. A positioning flange 347 is made on the valve disc 342. A snap ring groove is made at the end of the valve body 341. The snap ring 344 is snapped into the snap ring groove. The outer diameter width of the positioning flange 347 is greater than the inner diameter width of the snap ring 344. The snap ring 344 limits the movement of the valve disc 342 to prevent the valve disc 342 from detaching from the valve body 341. The end face of the positioning flange 347 cooperates with the side wall of the installation cavity to guide the movement of the valve disc 342 inside the valve body 341, ensuring the correct operation of the valve disc 342.

[0032] In the above technical solution: A gland 35 is further provided at the end of the overflow valve 34. The gland 35 is fixed on the second mounting plate 6. A second spring 36 is sleeved on the mounting nut 37. The two ends of the second spring 36 are respectively in contact with the gland 35 and the mounting nut 37. An air outlet 351 is made at the bottom of the gland 35. The air outlet 351 communicates with the installation cavity and the air circulation holes 346 on the overflow valve 34. When the oil overflows from the end of the filter element 3, the oil flows out of the gland 35 through the opened overflow valve 34 and the air outlet 351. Due to the blocking effect of the gland 35, the external oil cannot enter the gland 35. Thus, it is possible to judge whether there is an abnormal situation with the filter element 3 corresponding to the gland 35 by observing the oil stain conditions on the inner side of the gland 35 and the end cap 32 at the tail end.

[0033] In the above technical solution: As Figure 2As shown, the partition plate 2 serves as the bottom surface of the upper cavity. The partition plate 2 is transversely inclined, and the lowest part of the partition plate 2 is recessed to form a semi-circular oil storage tank 21. A floating valve 22 is provided in the oil storage tank 21. The floating valve 22 can automatically adjust the valve opening according to the oil level, and can effectively control the liquid accumulation in the upper cavity of the filter. The inclined partition plate 2 enables the oil at the bottom of the upper cavity to quickly converge into the oil storage tank 21, and then the liquid level change of the oil storage tank 21 is used to control the oil storage volume in the upper cavity. By the difference between the cross-sectional area of the oil storage tank 21 and the bottom area of the upper cavity, the oil level change caused by the oil volume change in the upper cavity is amplified, thereby improving the effect of the floating valve 22 in controlling the oil storage volume in the upper cavity. The floating valve 22 can be directly purchased from the market. The floating valve 22 provided by this technical solution includes a floating valve body 221 and a float 222. A through hole 228 is formed in the floating valve body 221, and a second sealing ring 223 for sealing between the floating valve body 221 and the oil storage tank 21 is sleeved on the floating valve body 221. A sealing plug 224 is provided on the float 222. The sealing plug 224 is threadedly installed on the float 222, and the end face of the sealing plug 224 exposes the float 222 and serves as a sealing surface 227. A connecting portion 225 is provided on the side of the floating valve body 221, and the float 222 is hinged to the connecting portion 225 through a pin shaft 226. The float 222 can rotate relative to the floating valve body 221. When the sealing surface 227 abuts against the end of the through hole 228, the floating valve 22 is in a closed state, as shown in Figure 8 ; when the sealing surface 227 disengages from the through hole 228, the floating valve 22 is in an open state, as shown in Figure 9 . The floating valve 22 provided by this technical solution utilizes the lever principle to amplify the effect of the buoyancy and gravity received by the float, improving the reliability of the valve action; it also utilizes the principle of a crank and connecting rod. When the valve is opened and closed, there is no relative sliding distance on the sealing surface 227 of the sealing plug 224, avoiding friction damage to the sealing surface 227 and improving the reliability of the valve. A hexagonal hole 229 is formed in the sealing surface 227. After the floating valve 22 is installed, the installation degree of the sealing plug 224 can be adjusted with an internal hexagonal wrench on the outside, so as to adjust the in-place state of the valve, and the sealing effect when the valve is closed can be ensured.

[0034] In the above technical solution: A vertical baffle 82 is formed at the end of the air inlet cover plate 8. An air vent 83 is formed at the bottom of the vertical baffle 82. The air inlet 81 is located above the air vent 83, and the air vent 83 is located below the partition plate 2 and the upper cavity. The end of the partition plate 2 protrudes from the side of the upper cavity to form a horizontal baffle 102, and the height of the horizontal baffle 102 is higher than the bottom surface height of the vertical baffle 82, that is, the horizontal baffle 102 is located above the air vent 83. The exhaust gas flow enters the air inlet cover plate 8 through the air inlet 81. The vertical baffle 82 can prevent the exhaust gas flow from directly impacting the filter element 3 and avoid the vibration of the filter element 3. At the same time, the vertical baffle 82 can buffer and adsorb the exhaust gas flow, reduce the oil content in the exhaust gas flow, and reduce the working burden of the filter element 3. The exhaust gas flow then enters the housing 1 through the air vent 83. The horizontal baffle 102 reduces the exhaust gas flow flowing directly upward, makes the exhaust gas flow contact the lower cavity, and improves the buffering effect of the lower cavity.

[0035] In the above technical solution: The end of the horizontal baffle 102 is bent upward to form a retaining edge 103, and diversion notches 104 are formed at both ends of the retaining edge 103. The oil liquid flowing back flows through the horizontal baffle 102 and is blocked by the retaining edge 103. The oil liquid accumulated on the horizontal baffle 102 flows out through the diversion notches 104 and flows back along the inner wall of the housing 1 to avoid secondary entrainment of the exhaust gas flow.

[0036] In the above technical solution: One end of the housing 1 close to the air inlet cover plate 8 is an open end. The bottom surface of the lower cavity is inclined, and the lower position part of the bottom surface of the lower cavity is located at the open end, so as to facilitate the cleaning and sewage discharge of the lower cavity. At the same time, the oil liquid depth at the bottom of the open end of the housing 1 is increased to ensure the buffering effect. The lower cavity mainly provides a longitudinal buffering distance for the exhaust gas. Utilizing the characteristic of the large density of the liquid, after there is a buffering space, it is difficult for the liquid in the exhaust gas flow to obtain sufficient force to change its movement direction from horizontal movement to vertical upward movement, and at the same time, the liquid is kept away from the upward exhaust gas flow, so as to reduce the oil liquid entrainment in the exhaust gas flow and is beneficial to reducing the filtration load of the filter element 3.

[0037] In the above technical solution: A housing groove 105 is formed at the bottom of the housing 1, and the top surface of the housing groove 105 is inclined. A base 9 is fixed at the bottom of the housing 1, and the bottom of the housing 1 and the base 9 are sealed by a sealing ring, so that the housing groove 105 forms a sealed interlayer. An inlet 107 and an outlet 108 communicating with the interlayer are formed on the housing 1. As Figure 6As shown in the figure, a number of first partitions 106 and a number of second partitions 112 are respectively provided on the opposite side walls of the housing groove 105. The first partitions 106 and the second partitions 112 are arranged along the inclined direction perpendicular to the top surface of the housing groove 105. The first partitions 106 and the second partitions 112 are parallel to each other and are evenly arranged in the housing groove 105. There are flow-through gaps between the ends of the first partitions 106, the ends of the second partitions 112 and the wall of the housing groove 105. The first partitions 106 and the second partitions 112 are arranged in a relatively crosswise manner. The first partitions 106 and the second partitions 112 form a curved flow path in the water inlet layer, avoiding local stagnant water and increasing the heat exchange area at the same time. The top surface of the housing groove 105 is inclined, that is, the top surface of the water inlet layer is inclined. The first partitions 106 and the second partitions 112 are arranged along the inclined direction perpendicular to the top surface of the housing groove 105, which can exhaust all the gas in the inlet layer, avoid local air bubbling at the top of the water inlet layer, and effectively ensure the heat dissipation effect of the top surface of the inlet layer. The height of the water outlet 108 is higher than the height of the water inlet 107. The water enters from the low position and exits from the high position, avoiding air residue at the top of the flow path and ensuring the effective heat dissipation area of the flow path. The flow path can be used for cooling or heating the oil. When removing condensable gases, in order to avoid gas condensation from polluting the working oil, it is usually necessary to heat the oil.

[0038] In the above technical solution: a number of heat dissipation ribs 109 are provided in the lower cavity. The heat dissipation ribs 109 increase the heat exchange area and improve the cooling or heating efficiency; at the same time, the heat dissipation ribs 109 play a role in dividing the air flow. Utilizing the weight and viscosity of the liquid, the heat dissipation ribs 109 increase the contact times with the oil in the air flow, reduce the impact force of the air flow, and increase the collision times and contact area with the air flow. Utilizing the relatively rough surface of the heat dissipation rib 109 casting, the kinetic energy of the oil in the air flow is quickly reduced, improving the capture effect of the oil contained in the exhaust air flow, thereby improving the oil filtration effect and being beneficial to reducing oil and gas emissions. The heat dissipation ribs 109 are arranged perpendicular to the opening end face of the housing 1, which is convenient for cleaning the lower cavity of the housing 1; the direction of the heat dissipation ribs 109 is the same as the air flow direction, which can reduce the exhaust pressure loss.

[0039] In the above technical solution: an oil return hole 110 and a sewage discharge hole 111 are made on the side surface of the lower cavity. The vacuum pump sucks oil from the oil pool at the bottom of the lower cavity through the oil return hole 110. The height of the oil return hole 110 is higher than the bottom surface of the lower cavity, which can form a buffer oil pool at the bottom of the lower cavity, reduce the impact force of the exhaust air flow, enhance the capture and adsorption effect of the oil in the air flow, reduce the filtration load of the filter element, and be beneficial to reducing oil and gas emissions.

[0040] In the above technical solution: four oil accumulation grooves 91 are made on the base 9. The oil accumulation grooves 91 prevent oil from flowing out and can keep the surrounding land clean.

[0041] The working process of the internally partitioned exhaust filter for a vacuum pump is as follows: The oil and oil fumes enter through the air inlet 81 and are blocked by the vertical baffle 82, and then enter the housing 1 through the ventilation holes 83 at the bottom of the vertical baffle 82. Utilizing the weight and viscosity of the liquid, and also being blocked by the horizontal baffle 102, the oil and oil fumes first enter the lower cavity and come into contact with the heat dissipation ribs 109 for buffering, and are cooled or heated by the water flow channels in the housing grooves 105. Then the oil fumes enter the upper cavity and are adsorbed by the filter element 3 for filtration, and finally are discharged from the exhaust port 101.

[0042] In the internally partitioned exhaust filter for a vacuum pump, the exhaust air flow enters the intake cover plate 8 through the air inlet 81. The vertical baffle 82 can prevent the exhaust air flow from directly impacting the filter element 3 and avoid the vibration of the filter element 3. At the same time, the vertical baffle 82 can buffer and adsorb the exhaust air flow, reduce the oil content in the exhaust air flow, and reduce the working burden of the filter element 3. The exhaust air flow then enters the housing 1 through the ventilation holes 83. The horizontal baffle 102 reduces the exhaust air flow flowing directly upward, enables the exhaust air flow to contact the lower cavity, and improves the buffering effect and cooling effect of the lower cavity. The heat dissipation ribs in the lower cavity increase the heat exchange area, improve the cooling or heating efficiency. At the same time, the heat dissipation ribs 109 play a role in dividing the air flow, reduce the impact force of the air flow, and increase the number of collisions and contact area with the air flow, improving the capture effect of the oil contained in the exhaust air flow, thereby improving the oil filtration effect and being beneficial to reducing oil and gas emissions. The refluxed oil flows through the horizontal baffle 102 and is blocked by the baffle edge 103. The oil accumulated on the horizontal baffle 102 flows out through the diversion notch 104 and flows back along the inner wall of the housing 1, avoiding secondary entrainment by the exhaust air flow. The bottom surface of the lower cavity is inclined, and the low position part of the bottom surface of the lower cavity is located at the open end, so as to facilitate the cleaning and sewage discharge of the lower cavity. At the same time, it increases the oil depth at the bottom of the open end of the housing 1 to ensure the buffering effect. The first partition 106 and the second partition 112 form a curved flow channel in the water-filled layer, avoiding local stagnant water and also increasing the heat exchange area. The top surface of the housing groove 105 is inclined, that is, the top surface of the water-filled layer is inclined. The first partition 106 and the second partition 112 are arranged along the direction perpendicular to the inclination of the top surface of the housing groove 105, which can exhaust all the gas in the layer, avoid local bulging of the top of the water-filled layer, and effectively ensure the heat dissipation effect of the top surface of the layer.

[0043] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to substitute, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0044] Although the terms such as housing 1; exhaust port 101; transverse baffle 102; edge guard 103; diversion notch 104; housing groove 105; first partition 106; water inlet 107; water outlet 108; heat dissipation rib 109; oil return hole 110; sewage discharge hole 111; second partition 112; partition plate 2; oil storage tank 21; floating valve 22; floating valve body 221; float 222; second sealing ring 223; sealing plug 224; connecting part 225; pin shaft 226; sealing surface 227; through hole 228; hexagonal hole 229; filter element 3; intake pipe cap 31; tail end pipe cap 32; first sealing ring 33; overflow valve 34; valve body 341; valve plate 342; gasket 343; circlip 344; first spring 345; air flow through hole 346; positioning flange 347; gland 35; air outlet 351; second spring 36; mounting nut 37; support plate 4; first mounting plate 5; second mounting plate 6; mounting cover plate 7; intake cover plate 8; intake port 81; vertical baffle 82; ventilation hole 83; base 9; oil accumulation tank 91 are used more frequently in this text, it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any kind of additional restriction is contrary to the spirit of the present invention.

[0045] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. The specific embodiments described herein are only illustrative examples of the spirit of the present invention. Those skilled in the technical field to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to substitute, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An exhaust filter for an internally partitioned vacuum pump, comprising a housing (1) and a plurality of filter elements (3) located within the housing (1). An intake cover plate (8) is provided at an end of the housing (1), and an intake port (81) is formed on the intake cover plate (8). An exhaust port (101) is formed on the top surface of the housing (1), characterized in that A partition plate (2) is provided inside the housing (1). The partition plate (2) divides the housing (1) into an upper cavity and a lower cavity. The filter element (3) is located in the upper cavity. A number of heat dissipation ribs (109) are provided in the lower cavity. A vertical baffle (82) is formed at the end of the air inlet cover plate (8). A ventilation hole (83) is formed at the bottom of the vertical baffle (82). The air inlet (81) is located above the ventilation hole (83). The ventilation hole (83) is located below the partition plate (2) and the upper cavity.

2. The exhaust filter for a vacuum pump with internal partition according to claim 1, characterized in that A transverse baffle (102) protrudes from the end of the partition plate (2). The transverse baffle (102) is located above the ventilation hole (83).

3. The exhaust filter for a vacuum pump with internal partition according to claim 2, characterized in that The end of the transverse baffle (102) is bent upward to form a retaining edge (103). Flow guide notches (104) are formed at both ends of the retaining edge (103). The refluxed oil flows through the transverse baffle (102) and is blocked by the retaining edge (103). The oil accumulated on the transverse baffle (102) flows out through the flow guide notches (104) and flows back along the inner wall of the housing (1).

4. The exhaust filter for a vacuum pump with internal partitioning according to claim 1, wherein One end of the housing (1) close to the air inlet cover plate (8) is an open end. The bottom surface of the lower cavity is inclined, and the lower part of the bottom surface of the lower cavity is located at the open end.

5. An exhaust filter for a vacuum pump with internal partitioning according to claim 1, characterized in that A housing groove (105) is formed at the bottom of the housing (1). The top surface of the housing groove (105) is inclined. A base (9) is fixed to the bottom of the housing (1). A seal ring is used to seal between the bottom of the housing (1) and the base (9), so that the housing groove (105) forms a sealed interlayer. An inlet (107) and an outlet (108) communicating with the interlayer are formed on the housing (1). The height of the outlet (108) is higher than the height of the inlet (107). A number of first partition plates (106) and a number of second partition plates (112) are respectively provided on the opposite side walls of the housing groove (105). The first partition plates (106) and the second partition plates (112) are arranged along the inclined direction perpendicular to the top surface of the housing groove (105). The first partition plates (106) and the second partition plates (112) are parallel to each other and evenly arranged in the housing groove (105). There are flow gaps between the ends of the first partition plates (106), the ends of the second partition plates (112) and the side walls of the housing groove (105). The first partition plates (106) and the second partition plates (112) are arranged in a relatively crosswise manner. The first partition plates (106) and the second partition plates (112) form a curved flow path in the interlayer into which water is introduced.

6. The exhaust filter for a vacuum pump with internal partitioning according to claim 5, characterized in that Four oil accumulation grooves (91) are formed on the base (9).

7. The exhaust filter for a vacuum pump with internal partitioning according to claim 1, characterized in that The partition plate (2) serves as the bottom surface of the upper cavity. The partition plate (2) is transversely inclined, and the lowest part of the partition plate (2) is recessed to form an oil storage groove (21). A floating valve (22) is provided in the oil storage groove (21).

8. An exhaust filter for a vacuum pump with internal partitioning according to claim 7, characterized in that The floating valve (22) includes a floating valve body (221) and a float (222). A through hole (228) is formed in the floating valve body (221). A second sealing ring (223) for sealing between the floating valve body (221) and the oil storage tank (21) is sleeved on the floating valve body (221). A sealing plug (224) is provided on the float (222). The sealing plug (224) is threadedly installed on the float (222). The end face of the sealing plug (224) exposes the float (222) and serves as a sealing surface (227). A connecting portion (225) is provided on the side of the floating valve body (221). The float (222) is hinged to the connecting portion (225) through a pin shaft (226). The float (222) can rotate relative to the floating valve body (221). When the sealing surface (227) closely adheres to the end of the through hole (228), the floating valve (22) is in a closed state; when the sealing surface (227) disengages from the through hole (228), the floating valve (22) is in an open state.

9. An exhaust filter for a vacuum pump with internal partitioning according to claim 1, characterized in that The heat dissipation ribs (109) are arranged perpendicular to the opening end face of the housing (1), and the direction of the heat dissipation ribs (109) is consistent with the air flow direction.

10. The exhaust filter for a vacuum pump with an internal partition according to claim 1, characterized in that An oil return hole (110) and a sewage discharge hole (111) are formed on the side of the lower cavity, and the height of the oil return hole (110) is higher than the bottom surface of the lower cavity.

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