Breathable dustproof device for oil tank of roots blower

Abstract

The utility model provides a ventilation dustproof device for a Roots blower oil tank, which is provided with a ventilation cap and a lengthened pipe, the ventilation cap is composed of a ventilation cap dustproof section and a ventilation cap ventilation section, the lower end of the ventilation cap ventilation section is fixedly connected with the upper end of the lengthened pipe, and the outer diameter of the ventilation cap dustproof section is larger than that of the ventilation cap ventilation section. A plurality of ventilation holes are formed in the ventilation section of the ventilation cap in the circumferential direction, the interior of the lengthened pipe is of a hollow structure, the oil baffle plate is in a D shape, the arc face of the D-shaped oil baffle plate is fixedly connected with the inner surface of the lengthened pipe, and after fixed connection, the oil baffle plate is arranged in the lengthened pipe in a downward inclined mode. And a ventilation channel is arranged between the linear surface of the D-shaped oil baffle plate and the inner surface of the extension pipe at the front end of the linear surface. When the pressure in the oil tank is too high, lubricating oil in the oil tank cannot be discharged along with high-pressure gas, and the problem that the oil level in the oil tank is lowered cannot be caused. The Roots blower can be widely applied to Roots blowers.

Description

Technical Field

[0001] This utility model relates to a ventilating device, and more particularly to a ventilating and dustproof device for the oil tank of a Roots blower. Background Technology

[0002] Roots blowers, as a typical gas pressurization and conveying machine, are widely used in industries such as building materials, power, metallurgy, mining, aquaculture, sewage treatment, and chemicals.

[0003] The Roots blower is equipped with an oil tank, and an oil tank vent cap is installed on the oil tank. The oil tank vent cap is mainly used to balance the air pressure inside and outside the oil tank, prevent the oil tank from leaking due to excessive pressure, and at the same time prevent external dust and impurities from entering the oil tank, ensuring the cleanliness of the lubricating oil.

[0004] However, most oil tank vent caps currently in use allow lubricating oil and high-pressure gas to mix together and be discharged through the vent cap when the pressure inside the oil tank is too high. This causes the oil level in the oil tank to drop, affecting the normal lubrication of the fan bearings and gears. Low oil levels can damage components such as bearings and gears, reducing the service life of the fan. Utility Model Content

[0005] This utility model addresses the above-mentioned technical problems by providing a venting and dustproof device for the oil tank of a Roots blower. When the pressure inside the oil tank is too high, the lubricating oil inside the tank will not be discharged through the vent cap along with the high-pressure gas, thus preventing the oil level inside the tank from dropping and ensuring the normal lubrication of the blower's bearings, gears, and other components, thereby extending the service life of the blower.

[0006] Therefore, the technical solution of this utility model is a ventilated and dustproof device for the oil tank of a Roots blower, which is provided with a ventilated cap and an extension tube. The ventilated cap is located in the upper section of the ventilated and dustproof device, and the extension tube is located in the lower section of the ventilated and dustproof device.

[0007] The breathable cap consists of a dustproof section and a breathable section. The dustproof section is located in the upper part of the breathable cap, and the breathable section is located in the lower part of the breathable cap. The lower end of the breathable section is fixedly connected to the upper end of the extension tube.

[0008] The outer diameter of the dustproof section of the breathable cap is larger than the outer diameter of the breathable section of the breathable cap. The breathable section of the breathable cap has a hollow structure inside. Multiple breathable holes are provided along the circumferential direction on the breathable section of the breathable cap. The breathable holes are arranged through the inside and outside.

[0009] The inside of the lengthened pipe is a hollow structure, and the inside of the lengthened pipe is provided with an oil baffle, the oil baffle is in a D-shaped structure, the curved surface of the D-shaped oil baffle is fixedly connected with the inner surface of the lengthened pipe, after the fixed connection, the oil baffle is arranged to be inclined downward in the inside of the lengthened pipe, and a gas permeation channel is arranged between the straight surface of the D-shaped oil baffle and the inner surface of the lengthened pipe at the front end of the straight surface.

[0010] Preferably, the outer circumference of the dustproof section of the gas permeation cap is fixedly provided with anti-skid strips, the number of the anti-skid strips is multiple, and the multiple anti-skid strips are arranged along the length direction of the gas permeation and dustproof device.

[0011] The multiple anti-skid strips are uniformly distributed along the circumferential direction on the gas permeation cap dustproof section.

[0012] Preferably, the lower end position of the inner circumference of the gas permeation section of the gas permeation cap is provided with an internal thread, the upper end position and the lower end position of the outer circumference of the lengthened pipe are respectively provided with external threads, the lower end position of the gas permeation section of the gas permeation cap is locked with the upper end position of the lengthened pipe through the internal and external threads, and the external thread of the lower end position of the outer circumference of the lengthened pipe is used for locking with the oil tank interface.

[0013] Preferably, the number of the oil baffles is four, the four oil baffles are uniformly distributed along the length direction of the lengthened pipe in the inside of the lengthened pipe, and the two adjacent oil baffles are distributed with a rotation of 180 degrees.

[0014] Preferably, the angle of the oil baffle inclined downward in the inside of the lengthened pipe is 5°±1°.

[0015] Preferably, the size of the gas permeation channel is 1 / 4 of the inner diameter size of the lengthened pipe.

[0016] Preferably, the multiple gas permeation holes are located at the position close to the upper end on the gas permeation section of the gas permeation cap.

[0017] Preferably, the number of the gas permeation holes is eight, and the eight gas permeation holes are uniformly distributed along the circumferential direction on the gas permeation section of the gas permeation cap.

[0018] The beneficial effects of the utility model are as follows:

[0019] 1. By arranging the oil baffle in the inside of the lengthened pipe, the oil baffle can effectively block the lubricating oil in the oil tank from being discharged outward, when the pressure in the oil tank is too high, the lubricating oil in the oil tank and the high-pressure gas will be mixed together and move to the gas permeation hole direction, among them, the lubricating oil will be blocked by the oil baffle and fall into the oil tank again, the high-pressure gas will normally pass through the gas permeation channel and enter the inside of the gas permeation section of the gas permeation cap, and then be discharged outward through the gas permeation hole, finally, the high-pressure gas can be normally discharged, the stability of the pressure in the oil tank is maintained, the discharge of the lubricating oil outward is avoided, the oil amount of the lubricating oil in the oil tank is maintained, the normal lubrication of the bearing and gear parts is ensured, and the service life of the fan is prolonged.

[0020] 2. In order to increase the convenience of the installation of the air permeable dustproof device and the firmness after installation, the anti-skid strips are fixed on the outer circumference of the air permeable cap dustproof section, the number of the anti-skid strips is multiple, the multiple anti-skid strips are arranged along the length direction of the air permeable dustproof device, and the multiple anti-skid strips are uniformly distributed along the circumferential direction on the air permeable cap dustproof section. When the air permeable dustproof device is installed, the operator holds the anti-skid strips, so that the friction between the hands and the air permeable cap dustproof section is increased, and it is ensured that the air permeable dustproof device can be quickly and accurately assembled in place.

[0021] 3. In order to further increase the blocking effect on the lubricating oil in the oil tank, the downward inclination angle of the oil baffle in the lengthened pipe is 5°±1°. After the lubricating oil contacts the lower end surface of the oil baffle, under the action of the upward thrust of the high-pressure gas, the lubricating oil will flow away from the air permeation channel along the lower end surface of the oil baffle under the action of the 5°±1° inclination angle, and will not flow to the direction of the air permeation channel. Finally, under the action of gravity, the lubricating oil falls into the oil tank again.

[0022] Meanwhile, the size of the air permeation channel is 1 / 4 of the inner diameter size of the lengthened pipe. The size ratio can not only ensure that the high-pressure gas can smoothly flow upward through the air permeation channel, but also can reduce the noise generated when the high-pressure gas flows, and the high-pressure gas will not cause too much impact on the lubricating oil, so that the lubricating oil will not be splashed everywhere when it is subjected to too much pressure impact. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a structural schematic diagram of the utility model;

[0024] Fig. 2 is a structural schematic diagram of the oil baffle in the utility model.

[0025] Explanation of symbols in the drawing:

[0026] 1. Air permeable cap; 101. Air permeable cap dustproof section; 10101. Anti-skid strip; 102. Air permeable cap air permeation section; 10201. Air permeation hole; 2. Lengthened pipe; 201. Outer thread; 3. Oil baffle; 4. Air permeation channel. DETAILED DESCRIPTION

[0027] The utility model will be further described below in combination with examples.

[0028] Through Figs. 1-2It can be seen that the Roots blower oil tank air-permeable dustproof device is provided with an air-permeable cap 1 and an extension pipe 2, the air-permeable cap 1 is located at the upper section of the air-permeable dustproof device, the extension pipe 2 is located at the lower section of the air-permeable dustproof device, the air-permeable cap 1 is composed of an air-permeable cap dustproof section 101 and an air-permeable cap air-permeable section 102, the air-permeable cap dustproof section 101 is located at the upper section of the air-permeable cap 1, the air-permeable cap air-permeable section 102 is located at the lower section of the air-permeable cap 1, and the lower end of the air-permeable cap air-permeable section 102 is fixedly connected with the upper end of the extension pipe 2.

[0029] The outer diameter size of the air-permeable cap dustproof section 101 is greater than that of the air-permeable cap air-permeable section 102, and the air-permeable cap dustproof section 101 can protect the air-permeable cap air-permeable section 102 and effectively block the outside dust and liquid from entering the inside of the air-permeable cap air-permeable section 102.

[0030] The inside of the air-permeable cap air-permeable section 102 is a hollow structure, a plurality of air-permeable holes 10201 are arranged on the air-permeable cap air-permeable section 102 in the circumferential direction, the air-permeable holes 10201 are arranged through the inside and outside, the air-permeable holes 10201 are communicated with the inside of the oil tank, can balance the pressure inside and outside the oil tank, and ensure that the inside of the oil tank maintains a proper operating pressure.

[0031] The inside of the extension pipe 2 is a hollow structure, the inside of the extension pipe 2 is communicated with the inside of the air-permeable cap air-permeable section 102, the inside of the extension pipe 2 is provided with an oil baffle 3, the oil baffle 3 is in a D-shaped form, the arc surface of the D-shaped oil baffle 3 is fixedly connected with the inner surface of the extension pipe 2, after the fixed connection, the oil baffle 3 is arranged to be inclined downward in the inside of the extension pipe 2, and the straight surface of the D-shaped oil baffle 3 is provided with an air-permeable channel 4 between the straight surface and the inner surface of the extension pipe 2 at the front end of the straight surface.

[0032] The oil baffle 3 can effectively block the lubricating oil in the oil tank from being discharged outward, when the pressure in the oil tank is too high, the lubricating oil and the high-pressure gas in the oil tank will be mixed together and move to the direction of the air-permeable holes 10201, among them, the lubricating oil will be blocked by the oil baffle 3 and fall into the oil tank again, the high-pressure gas will normally pass through the air-permeable channel 4 into the inside of the air-permeable cap air-permeable section 102, and then be discharged outward through the air-permeable holes 10201, finally, it can ensure that the high-pressure gas can be normally discharged to maintain the stability of the pressure in the oil tank, avoid the lubricating oil from being discharged outward to maintain the oil amount of the lubricating oil in the oil tank, ensure the normal lubrication of the bearings and gears and other components, and prolong the service life of the blower.

[0033] In order to increase the convenience during installation and the firmness after installation of the air-permeable dustproof device, the following embodiments are adopted:

[0034] In the embodiment, the outer circumference of the air-permeable cap dustproof section 101 is fixedly provided with anti-skid strips 10101, the number of the anti-skid strips 10101 is multiple, the multiple anti-skid strips 10101 are arranged along the length direction of the air-permeable dustproof device, and the multiple anti-skid strips 10101 are uniformly distributed along the circumferential direction on the air-permeable cap dustproof section 101. When the operator installs the air-permeable dustproof device, the operator holds the anti-skid strips 10101, so that the friction between the hands and the air-permeable cap dustproof section 101 is increased, and it is ensured that the air-permeable dustproof device can be quickly and accurately assembled in place.

[0035] In order to facilitate disassembly and maintenance of the air-permeable dustproof device and reduce maintenance cost, the following embodiment is adopted:

[0036] In the embodiment, the inner circumference of the lower end position of the air-permeable cap air-permeable section 102 is provided with an internal thread, the outer circumference of the upper end position and the lower end position of the lengthening pipe 2 are respectively provided with external threads 201, the lower end position of the air-permeable cap air-permeable section 102 and the upper end position of the lengthening pipe 2 are locked by the internal and external threads, and the external thread 201 of the lower end position of the outer circumference of the lengthening pipe 2 is used to lock with the oil tank interface. When the air-permeable cap 1 or the lengthening pipe 2 fails, only the air-permeable cap 1 or the lengthening pipe 2 needs to be replaced, the operation is convenient and fast, and the maintenance cost is reduced.

[0037] In order to increase the blocking effect of the lubricating oil in the oil tank, the following embodiment is adopted:

[0038] In the embodiment, the number of the oil baffle 3 is four, the four oil baffles 3 are uniformly distributed along the length direction of the lengthening pipe 2 in the interior of the lengthening pipe 2, and the two adjacent oil baffles 3 are distributed at a rotation angle of 180 degrees. The four oil baffles 3 can multi-block the upwardly movable lubricating oil, maximally reduce the oil amount of the lubricating oil discharged outward, ensure that the oil tank maintains the appropriate amount of lubricating oil for a long time, ensure the normal lubrication of the bearing and gear and other components, and prolong the service life of the fan.

[0039] In order to further increase the blocking effect of the lubricating oil in the oil tank, the following embodiment is adopted:

[0040] In the embodiment, the downward inclination angle of the oil baffle 3 in the interior of the lengthening pipe 2 is 5°±1°. After the lubricating oil contacts the lower end surface of the oil baffle 3, due to the inclination angle of 5°±1°, under the action of the upward thrust of the high-pressure gas, the lubricating oil flows away from the air-permeable passage 4 along the lower end surface of the oil baffle 3, instead of flowing to the direction of the air-permeable passage 4, and finally falls into the oil tank again under the action of gravity.

[0041] At the same time, the size of the air passage 4 is 1 / 4 of the inner diameter size of the elongated pipe 2, and the size ratio can ensure that the high-pressure gas can flow smoothly through the air passage 4 upward, reduce the noise generated by the high-pressure gas flow, and the high-pressure gas will not cause excessive impact on the lubricating oil, and the lubricating oil will not be splashed everywhere when it is subjected to excessive pressure impact.

[0042] In order to avoid the high-pressure gas entering the inside of the air passage cap air passage section 102 from being disturbed, the following embodiment is adopted:

[0043] In this embodiment, a plurality of air holes 10201 are located on the air passage cap air passage section 102 near the upper end, so that the high-pressure gas entering the inside of the air passage cap air passage section 102 will not stay too much and will be smoothly discharged through the air holes 10201. If the plurality of air holes 10201 are arranged at the lower end of the air passage cap air passage section 102, part of the high-pressure gas entering the inside of the air passage cap air passage section 102 will stay at the upper end of the air passage cap air passage section 102 and form a circulating flow at this position, which will cause turbulence. Long-term turbulence will increase the resistance of the high-pressure gas flow, and eventually, it will cause the pressure and temperature in the oil tank to be too high.

[0044] In order to increase the efficiency of gas discharge, the following embodiment is adopted:

[0045] In this embodiment, the number of air holes 10201 is eight, and the eight air holes 10201 are uniformly distributed along the circumferential direction on the air passage cap air passage section 102, which can ensure the rapid discharge of high-pressure gas.

[0046] The above is only a specific embodiment of the present application, and cannot limit the scope of the present application. Therefore, the replacement of equivalent components or equivalent changes and modifications made within the scope of the present application shall still fall within the scope of the present application.

Claims

1. A breathable and dustproof device for the oil tank of a Roots blower, characterized in that: It is equipped with a breathable cap and an extension tube. The breathable cap is located at the upper section of the breathable and dustproof device, and the extension tube is located at the lower section of the breathable and dustproof device. The breathable cap consists of a dustproof section and a breathable section. The dustproof section is located in the upper part of the breathable cap, and the breathable section is located in the lower part of the breathable cap. The lower end of the breathable section is fixedly connected to the upper end of the extension tube. The outer diameter of the dustproof section of the breathable cap is larger than the outer diameter of the breathable section of the breathable cap. The breathable section of the breathable cap has a hollow structure inside. Multiple breathable holes are provided on the breathable section of the breathable cap along the circumferential direction. The breathable holes are arranged through the inside and outside. The interior of the extended tube is hollow, and an oil baffle is provided inside the extended tube. The oil baffle is D-shaped, and the curved surface of the D-shaped oil baffle is fixedly connected to the inner surface of the extended tube. After the fixed connection, the oil baffle is inclined downward inside the extended tube. A venting channel is provided between the straight surface of the D-shaped oil baffle and the inner surface of the extended tube at the front end of the straight surface.

2. The ventilated dustproof device for the oil tank of a Roots blower according to claim 1, characterized in that: The outer circumference of the dustproof section of the breathable cap is fixedly provided with anti-slip strips, and there are multiple anti-slip strips, which are arranged along the length of the breathable dustproof device. Multiple anti-slip strips are evenly distributed along the circumference on the dustproof section of the breathable cap.

3. The ventilated dustproof device for the oil tank of a Roots blower according to claim 1, characterized in that: The lower end of the inner circumference of the vent section of the vent cap is provided with an internal thread, and the upper and lower ends of the outer circumference of the extension tube are respectively provided with external threads. The lower end of the vent section of the vent cap and the upper end of the extension tube are locked together by the internal and external threads. The external thread at the lower end of the outer circumference of the extension tube is used to lock with the oil tank interface.

4. The ventilated dustproof device for the oil tank of a Roots blower according to claim 1, characterized in that: The number of oil baffles is four, and the four oil baffles are evenly distributed inside the extended tube along the length of the extended tube, and the adjacent two oil baffles are rotated 180 degrees apart.

5. The ventilated dustproof device for the oil tank of a Roots blower according to claim 1, characterized in that: The oil baffle plate is tilted downward at an angle of 5°±1° inside the extended pipe.

6. The ventilated dustproof device for the oil tank of a Roots blower according to claim 1, characterized in that: The size of the ventilation channel is 1 / 4 of the inner diameter of the extended tube.

7. The ventilated and dustproof device for the oil tank of a Roots blower according to claim 1, characterized in that: The multiple ventilation holes are located on the ventilation section of the ventilation cap near the upper end.

8. The ventilated and dustproof device for the oil tank of a Roots blower according to claim 7, characterized in that: The number of vent holes is eight, and the eight vent holes are evenly distributed along the circumference on the vent section of the vent cap.

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