A self-maintenance integrated device for vacuum pump and vacuum tank

Abstract

The present invention discloses a self-maintenance integrated device of a vacuum pump and a vacuum tank. The present invention divides the vacuum tank into a vacuum chamber and an oil storage chamber, adds lubricating oil into the oil storage chamber and provides an oil pipeline, so that the vacuum pump forms an oil circulation in the vacuum tank, so as to realize maintenance-free of the vacuum pump; the present invention arranges the vacuum pump in the vacuum chamber in the vacuum tank, and the vacuum pump operates to draw the vacuum chamber into a negative pressure, a vacuum pressure sensor is installed in the vacuum chamber, and when the pressure setting value is reached, an electric switch valve is opened to draw a vacuum for external equipment, so that the voltage stabilizing effect of the vacuum tank is fully exerted; the present invention provides an oil-gas separator on the exhaust pipe of the vacuum pump, and the oil-gas mixed gas generated by the vacuum pump passes through the oil-gas separator and is discharged into the oil storage chamber, and the oil storage chamber can further perform oil-gas separation, so that the oil-gas separation is more thorough.

Description

Technical Field

[0001] The invention relates to the field of vacuum technology, and in particular to a self-maintenance integrated device for a vacuum pump and a vacuum tank. Background Art

[0002] The use of vacuum pumps and tanks to provide power has been widely used in industry, such as vacuum-assisted brakes, vacuum-assisted manipulators, vacuum suction cups, etc.

[0003] In order to reduce noise, the prior art proposes placing the vacuum pump in a vacuum tank, and through the vacuum insulation inside the vacuum tank, effectively reducing the noise of the vacuum pump during operation and reducing the electromagnetic interference of the vacuum pump motor to the outside.

[0004] For example, the patent with patent number CN201720409965.5 proposes a vacuum pump device built into a vacuum tank, including a vacuum pump and a vacuum tank, wherein the vacuum pump is composed of a pump body, a motor, and blades; it is characterized in that a flange is provided at the end of one side of the vacuum pump motor and fixedly connected with the end cover of the vacuum tank, and most of the vacuum pump is suspended in the vacuum tank body under the fixed support of the flange; an air inlet, an air outlet and a controller are provided on the flange; the air inlet is connected to the internal space of the vacuum tank through a horizontal air inlet duct opened on the vacuum pump body; a plurality of exhaust ducts are radially opened on the vacuum pump body near the blade side and connected to the air outlet through an annular exhaust duct and a horizontal exhaust duct; although this technology places the vacuum pump in the vacuum tank, the vacuum tank has a good noise reduction and shielding effect on the vacuum pump, but because the vacuum pump requires oil lubrication, the vacuum pump needs to be taken out for regular oil change and maintenance, which is extremely inconvenient to operate.

[0005] For example, the patent with patent number CN201821563278.X proposes an integrated device of an electric vacuum pump and a tank body, and the patent with patent number CN201120340338.3 proposes an integrated device of an electric vacuum pump and a tank body. Both of them reduce the working noise of the vacuum pump by setting the electric vacuum pump in the vacuum tank, but they also have the problem of inconvenient maintenance of the vacuum pump oil.

[0006] In order to solve the above technical problems, a self-maintenance integrated device of a vacuum pump and a vacuum tank is urgently needed to solve the existing technical problems. Summary of the invention

[0007] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a self-maintenance integrated device for a vacuum pump and a vacuum tank.

[0008] In order to solve the technical problem of inconvenient maintenance of the vacuum pump when the vacuum pump is integrated in the vacuum tank, the present invention adopts the method of adding lubricating oil into the vacuum tank and setting pipelines so that the vacuum pump forms oil circulation in the vacuum tank to realize maintenance-free vacuum pump.

[0009] The present invention is achieved through the following technical solutions.

[0010] A self-maintenance integrated device for a vacuum pump and a vacuum tank, the device comprising a vacuum tank and a vacuum pump arranged inside the vacuum tank; characterized in that a partition component is arranged inside the vacuum tank, and the partition component divides the vacuum tank into a vacuum chamber and an oil storage chamber; the oil in the oil storage chamber lubricates the vacuum pump through an oil pipeline or immersion.

[0011] Furthermore, the vacuum tank includes a tank body and an end cover; a support plate is provided on the inner wall of the tank body; the support plate is annular and is provided at the upper part of the oil storage cavity, and its outer edge is fixedly mounted on the inner wall of the tank body.

[0012] Furthermore, a mounting plate is fixedly mounted on the support plate; a sealing gasket is arranged between the support plate and the mounting plate; the upper part of the mounting plate is a vacuum chamber, and the vacuum chamber and the oil storage chamber are isolated by the mounting plate.

[0013] Furthermore, the vacuum pump is fixedly mounted on the upper portion of the mounting plate and is located in the vacuum chamber; an oil inlet pipe is provided on the vacuum pump, one end of the oil inlet pipe is communicated with the vacuum pump, and the other end passes through the mounting plate and is immersed in the oil in the oil storage chamber, and the oil enters the vacuum pump through the oil inlet pipe to lubricate the vacuum pump.

[0014] Furthermore, an air inlet is provided on one side of the vacuum chamber; an electric switch valve is provided on the pipeline connected to the air inlet; a refueling hole is provided on one side of the oil storage chamber, and an oil drain hole is provided at the bottom of the tank body.

[0015] Furthermore, the vacuum pump is provided with a first exhaust pipe, one end of which is connected to the vacuum pump, and the other end of which is connected to the oil storage cavity through a sealing joint on the mounting plate.

[0016] Furthermore, an oil-gas separator is installed on the first exhaust pipe, and an oil return pipe is provided on the oil-gas separator. The oil in the oil return pipe flows into the oil storage cavity through the sealing joint on the mounting plate.

[0017] Furthermore, a vent is provided on one side of the oil storage cavity, and a dust cap is provided on the vent; and a vacuum pressure sensor is installed on the mounting plate.

[0018] Furthermore, the vacuum pump has no casing; a mounting flange is provided at the end of the vacuum pump; the mounting flange is fixedly connected to the partition assembly, and the lower end of the vacuum pump is immersed in the oil in the oil storage chamber.

[0019] Furthermore, the vacuum pump is provided with a second exhaust pipe, one end of which is communicated with the vacuum pump, and the other end of which is connected to the oil-gas separator; and a one-way exhaust valve is provided on the tank body.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1) The present invention divides the vacuum tank into a vacuum chamber and an oil storage chamber, adds lubricating oil into the oil storage chamber and arranges an oil pipeline, so that the vacuum pump forms an oil circulation in the vacuum tank, thereby realizing maintenance-free vacuum pump;

[0022] 2) The present invention arranges a vacuum pump in a vacuum chamber in a vacuum tank. The vacuum pump operates to pump the vacuum chamber into a negative pressure. A vacuum pressure sensor is installed in the vacuum chamber. When the pressure reaches a set value, the electric switch valve opens to pump vacuum for the external equipment, giving full play to the voltage stabilizing effect of the vacuum tank.

[0023] 3) The present invention provides an oil-gas separator on the exhaust pipe of the vacuum pump. The oil-gas mixture generated by the vacuum pump passes through the oil-gas separator and then is discharged into the oil storage chamber. The oil storage chamber can further separate the oil and gas, making the oil-gas separation more thorough. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a front view of Embodiment 1 of the present invention;

[0025] Figure 2 It is a left side view of Embodiment 1 of the present invention;

[0026] Figure 3 for Figure 1 AA section view;

[0027] Figure 4 This is a schematic diagram of the structure of Example 2 of the present invention.

[0028] In the figure: 1. Vacuum tank; 2. Vacuum pump; 3. Tank body; 4. End cover; 5. Support plate; 6. Mounting plate; 7. Vacuum chamber; 8. Oil storage chamber; 9. Air inlet; 10. Fuel filling hole; 11. Oil inlet pipe; 12. First exhaust pipe; 13. Wiring harness; 14. Oil-gas separator; 15. Oil return pipe; 16. Vent; 17. Dust cap; 18. Vacuum pressure sensor; 19. Electric switch valve; 20. Mounting flange; 21. One-way exhaust valve; 22. Air inlet with one-way valve; 23. Second exhaust pipe; 24. Oil drain hole. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions of various embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] The present invention is further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0031] Example 1

[0032] like Figure 1-3 As shown, a self-maintenance integrated device of a vacuum pump and a vacuum tank comprises a vacuum pump 2 and a vacuum tank 1; the vacuum pump 2 is fixedly installed in the vacuum tank 1.

[0033] The vacuum tank 1 comprises a tank body 3 and an end cover 4; the tank body 3 and the end cover 4 are connected in the form of a flange.

[0034] A support plate 5 is provided on the inner wall of the tank body 3;

[0035] The support plate 5 is annular, and the outer edge thereof is fixedly mounted on the inner wall of the tank body 3 .

[0036] A mounting plate 6 is fixedly mounted on the support plate 5;

[0037] A sealing gasket is provided between the support plate 5 and the mounting plate 6;

[0038] The support plate 5 separates the vacuum tank 1 into a vacuum chamber 7 and an oil storage chamber 8. Due to the effect of the sealing gasket, the vacuum chamber 7 is completely isolated from the oil storage chamber 8.

[0039] The vacuum pump 2 is fixedly mounted on the mounting plate 6 and is located in the vacuum chamber 7 .

[0040] When the vacuum pump 2 is powered on to draw a vacuum through the air inlet 22 with a one-way valve, a negative pressure is formed in the vacuum chamber 7 .

[0041] An air inlet 9 is provided in the corresponding area between the tank body 3 and the vacuum chamber 7; the air inlet 9 is connected to the equipment to be evacuated through a pipeline to evacuate the equipment.

[0042] A refueling hole 10 is provided in the area corresponding to the tank body 3 and the oil storage chamber 8 , and oil is added into the oil storage chamber 8 through the refueling hole 10 .

[0043] The bottom of the tank body 3 is provided with an oil drain hole 24, through which the oil in the oil storage chamber 8 is drained, so that the oil can be replaced.

[0044] In order to lubricate the vacuum pump 2 , an oil inlet pipe 11 is provided on the vacuum pump 2 ; one end of the oil inlet pipe 11 is communicated with the motor compartment of the vacuum pump 2 , and the other end passes through the mounting plate 6 and is immersed in the oil in the oil storage chamber 8 .

[0045] When the vacuum pump 2 starts to draw a vacuum through the air inlet 22 with a one-way valve, the air compression chamber of the vacuum pump 2 generates negative pressure, and the oil inlet pipe 11 sucks the oil in the oil storage chamber 8 into the motor compartment of the vacuum pump 2. The oil enters the air compression chamber of the vacuum pump 2 through the internal structure of the vacuum pump 2 to lubricate the blades in the air compression chamber.

[0046] The vacuum pump 2 is provided with a first exhaust pipe 12 , one end of which is communicated with the air compression chamber of the vacuum pump 2 , and the other end of which is communicated with the oil storage chamber 8 through a sealing joint on the mounting plate 6 .

[0047] Furthermore, an oil-gas separator 14 is installed on the first exhaust pipe 12, and an oil return pipe 15 is provided on the oil-gas separator 14; the gas sucked in by the vacuum pump 2 forms an oil-gas mixture in the air compression chamber of the vacuum pump 2; after the oil-gas mixture enters the first exhaust pipe 12, the oil-gas separation is carried out by the oil-gas separator 14; the gas separated by the oil-gas separator 14 is discharged from the tank body 3 through the first exhaust pipe 12, and the separated oil flows into the oil storage chamber 8 through the oil return pipe 15; thus, an oil circulation is formed in the vacuum pump 2.

[0048] Furthermore, a vent 16 is provided in a region of the tank body 3 corresponding to the oil storage cavity 8 , and a dust cap 17 is provided on the vent 16 .

[0049] External air enters the oil storage chamber 8 through the vent 16 to compensate for the volume of oil sucked away by the vacuum pump 2 .

[0050] The dustproof cap 17 filters the air and prevents dust from entering the oil storage cavity 8 .

[0051] When the vacuum pump 2 needs to be maintained by oil change, it is only necessary to open the oil drain hole 24 to release the oil in the oil storage chamber 8, and then add oil to the oil storage chamber 8 through the refueling hole 10, without taking the vacuum pump 2 out of the vacuum tank 1.

[0052] Furthermore, a vacuum pressure sensor 18 is installed on the mounting plate 6; an electric switch valve 19 is provided on the pipeline connected to the air inlet 9; when the vacuum degree in the vacuum chamber 7 reaches a set value, the vacuum pressure sensor 18 controls the electric switch valve 19 to open, providing a stable negative pressure to the external device.

[0053] During specific use, the vacuum pump 2 is powered on and starts to operate to draw a vacuum, and a negative pressure is formed in the vacuum chamber 7 of the vacuum tank 1; when the vacuum degree in the vacuum chamber 7 reaches the set value, the vacuum pressure sensor 18 controls the electric switch valve 19 to open, and provides a stable negative pressure to the external device; the air compression chamber of the vacuum pump 2 generates a negative pressure, and the oil inlet pipe 11 sucks the oil in the oil storage chamber 8 into the motor compartment of the vacuum pump 2, and the oil enters the air compression chamber of the vacuum pump 2 through the internal structure of the vacuum pump 2 to lubricate the blades in the air compression chamber; the gas sucked by the vacuum pump 2 forms an oil-gas mixture in the air compression chamber of the vacuum pump 2; after the oil-gas mixture enters the first exhaust pipe 12, the oil and liquid are separated by the oil-gas separator 14; the gas separated by the oil-gas separator 14 is discharged from the tank body 3 through the first exhaust pipe 12, and the separated oil flows into the oil storage chamber 8 through the return oil pipe 15.

[0054] Example 2

[0055] like Figure 4 As shown, the structural principle of this embodiment is similar to that of embodiment 1, and the difference from embodiment 1 is that:

[0056] 1) Remove the outer shell of the vacuum pump 2, and set a mounting flange 20 at the end of the vacuum pump 2, the mounting flange 20 is fixedly connected to the mounting plate 6, and the lower end of the vacuum pump 2 is immersed in the oil in the oil storage chamber 8;

[0057] 2) The vacuum pump 2 is provided with a second exhaust pipe 23, one end of the second exhaust pipe 23 is communicated with the air compression chamber of the vacuum pump 2, and the other end is connected to the oil-gas separator 14;

[0058] 3) A one-way exhaust valve 21 is provided on the tank body 3 .

[0059] The oil in the oil storage chamber 8 enters the motor compartment through the gap between the rotor and the stator of the vacuum pump 2. Due to the negative pressure, the oil enters the air compression chamber to lubricate the blades.

[0060] The gas sucked in by the vacuum pump 2 forms an oil-gas mixture in the air compression chamber, and the oil-gas mixture enters the oil-gas separator 14 through the second exhaust pipe 23. The oil-gas separator 14 separates the oil and gas, and the gas is directly discharged into the oil storage chamber 8, and then discharged from the tank body 3 through the one-way exhaust valve 21; the oil flows into the oil storage chamber 8 through the oil return pipe 15.

[0061] The one-way exhaust valve 21 blocks external air from entering the oil storage chamber 8 , thereby preventing dust from entering the oil storage chamber 8 .

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.

Claims

1. A self-maintenance integrated device for a vacuum pump and a vacuum tank, comprising a vacuum tank (1) and a vacuum pump (2) arranged inside the vacuum tank (1); characterized in that: The vacuum pump has no housing, a partition assembly is arranged in the vacuum tank (1), the partition assembly divides the vacuum tank (1) into a vacuum chamber (7) and an oil storage chamber (8), a mounting flange (20) is arranged at the end of the vacuum pump (2), the mounting flange (20) is fixedly connected to the partition assembly, the lower end of the vacuum pump (2) is immersed in the oil in the oil storage chamber (8), and the vacuum pump (2) is lubricated by immersion; The vacuum pump (2) is provided with a second exhaust pipe (23), one end of the second exhaust pipe (23) is in communication with the vacuum pump (2), and the other end is connected to the oil-gas separator (14); The vacuum tank (1) comprises a tank body (3) and an end cover (4), and a one-way exhaust valve (21) is provided on the tank body (3) of the vacuum tank (1).

2. The self-maintenance integrated device of the vacuum pump and vacuum tank according to claim 1, characterized in that: A support plate (5) is arranged on the inner wall of the tank body (3); the support plate (5) is annular and is arranged at the upper part of the oil storage cavity (8); the outer edge of the support plate (5) is fixedly mounted on the inner wall of the tank body (3).

3. The self-maintenance integrated device of the vacuum pump and vacuum tank according to claim 2, characterized in that: A mounting plate (6) is fixedly mounted on the support plate (5), a sealing gasket is provided between the support plate (5) and the mounting plate (6), an upper portion of the mounting plate (6) is a vacuum chamber (7), and the vacuum chamber (7) and the oil storage chamber (8) are isolated by the mounting plate (6).

4. The self-maintenance integrated device of the vacuum pump and vacuum tank according to claim 2, characterized in that: An air inlet (9) is provided on one side of the vacuum chamber (7), an electric switch valve (19) is provided on a pipeline connected to the air inlet (9), an oil filling hole (10) is provided on one side of the oil storage chamber (8), and an oil drain hole (24) is provided at the bottom of the tank body (3).

5. The self-maintenance integrated device of the vacuum pump and vacuum tank according to claim 3, characterized in that: The oil-gas separator (14) is provided with an oil return pipe (15).

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