Dumping and oil leakage preventing device for vacuum pump

Abstract

The utility model discloses an anti-dumping oil leakage device for a vacuum pump. The vacuum pump comprises a pump body, an oil tank and a catcher. The anti-dumping oil leakage device is connected between an oil tank and a trap and comprises a lower cover, a middle cover and an upper cover which are arranged from bottom to top; the lower end of the lower cover is provided with a lower connector connected with an oil tank oil outlet. A circumferential retaining wall with an opening is arranged on the lower cover, one side of the opening extends to the outer circumferential wall of the lower cover to form a closed end, the middle cover, the outer circumferential wall of the lower cover and the circumferential retaining wall jointly define a flow channel, a lower cover inlet is formed in the area, located in the circumferential retaining wall, of the lower cover, and a middle cover outlet is formed in the position, corresponding to the closed end, of the middle cover; the upper cover is provided with an upper connector connected with the trap; and the lower connector, the lower cover inlet, the runner, the middle cover outlet and the upper connector are communicated in sequence. The structure can be used as an optional accessory, is externally arranged and directly connected between an oil tank and a trap, is convenient to disassemble and assemble, flexible to use and high in adaptability, and is internally provided with a labyrinth oil way to achieve the purpose of preventing oil leakage caused by toppling.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, in particular to an anti-dumping and oil leakage device for a vacuum pump. Background Art

[0002] Existing oil-sealed vacuum pumps are basically based on Figure 1 The structure shown in the figure includes a pump body 1, an oil tank 2 and an oil mist collector 3. The oil outlet of the oil tank 2 is directly connected to the oil mist collector 3. Since the vacuum pump is inevitably tilted during use or transportation, when the vacuum pump tilts along the X or Y direction, as shown in the figure, Figure 2 As shown in FIG, the oil in the oil tank will leak to the outside through the oil mist collector due to impact, which not only causes oil waste but also pollutes the environment. Therefore, it is necessary to design an anti-dumping oil leakage device for a vacuum pump.

[0003] A Chinese patent with authorization announcement number CN112610488B proposes a tipping-up anti-oil leakage structure for a vacuum pump, including a pump body and an oil tank located on the front side of the pump body. A catcher is installed on the corresponding refueling port on the top surface of the oil tank. The corresponding inner port of the refueling port in the oil tank is connected to the upper port of the choke tube, and the lower port of the choke tube extends downward in a spiral shape to above the oil level in the oil tank. When the pump body is tipped to the left, right, front and rear, the vacuum pump oil in the oil tank is located outside the upper port of the choke tube. In addition, a Chinese patent with the authorization publication number CN214577597U proposes an anti-side-overturn oil leakage trap for a vacuum pump, comprising an exhaust valve core located above the exhaust port of the oil tank, the exhaust valve core housing being equipped with a trap housing, the lower end of the trap housing extending downward to form a pump oil interception chamber, one end of a choke tube fixedly mounted in the pump oil interception chamber to prevent the pump oil in the oil tank from overflowing toward the exhaust valve core when the pump body tips over, the other end of the choke tube spirally extending downward to the outside of the trap housing and dockingly fixed to the exhaust port. Both of the above structures have a certain anti-overturn oil leakage effect, but both rely on integrating the anti-leakage structure into the oil tank or the trap, which is time-consuming and labor-intensive to install, requiring modifications to the design of the oil tank and the trap, bringing certain difficulties to production and subsequent repair and maintenance. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the above problems and provide an anti-dumping and oil leakage device for a vacuum pump, which has good anti-dumping and oil leakage effect and adopts a direct external installation method, has strong adaptability, and is easy to install and use.

[0005] The technical solution of the utility model is:

[0006] The utility model describes an anti-dumping and oil leakage device for a vacuum pump, the vacuum pump comprising a pump body, an oil tank and a collector, and is characterized in that: the anti-dumping and oil leakage device is connected between the oil tank and the collector, and comprises a lower cover, a middle cover and an upper cover arranged in sequence from bottom to top; the lower end of the lower cover is provided with a lower connecting port connected to the oil outlet of the oil tank; the lower cover is provided with a circumferential retaining wall with an opening, one side of the opening extends to the outer circumferential wall of the lower cover to form a closed end, the middle cover and the outer circumferential wall of the lower cover and the circumferential retaining wall are jointly arranged to form a flow channel, the area of ​​the lower cover located within the circumferential retaining wall is provided with a lower cover inlet, and the middle cover is provided with a middle cover outlet at the position corresponding to the closed end; the upper cover is provided with an upper connecting port connected to the collector; the lower connecting port, the lower cover inlet, the flow channel, the middle cover outlet and the upper connecting port are connected in sequence.

[0007] With the aid of the above structure, the utility model has an internally arranged labyrinth oil circuit structure, and the vacuum pump oil must pass through the lower connecting port, the lower cover inlet, the flow channel, the middle cover outlet, the upper connecting port, and the collector in sequence before it can flow out, ensuring that when the vacuum pump is tilted in any direction forward, backward, left or right, the vacuum pump oil cannot leak out of the collector, thereby preventing vacuum pump oil from being wasted and contaminating the workplace; at the same time, the entire anti-tilting and oil leakage structure adopts an external installation structure, which can be directly connected between the oil tank and the collector, and is easy to disassemble and assemble, without the need to redesign the oil tank or the collector. It can be used as an optional accessory for a vacuum pump, and is more adaptable and flexible to use.

[0008] Furthermore, in the anti-dumping and oil leakage device for a vacuum pump described in the utility model, the lower cover and the middle cover, and the middle cover and the upper cover are detachably connected.

[0009] Furthermore, in the anti-dumping and oil leakage device for a vacuum pump described in the utility model, an upper sealing paper pad is sandwiched between the upper cover and the middle cover to enhance the sealing and leak-proof effect and prevent oil from leaking from the connection gap between the upper cover and the middle cover.

[0010] Furthermore, in the anti-dumping and oil leakage device for a vacuum pump described in the utility model, the upper sealing paper gasket is hollow and ring-shaped and does not cover the middle cover outlet. The central area of ​​the upper sealing paper gasket is connected to the upper connecting port. Bolts penetrate the middle cover and the upper sealing paper gasket and are threadedly connected to the upper cover. The fixing method is simple and reliable, and disassembly and assembly are convenient.

[0011] Furthermore, in the anti-dumping and oil leakage device for a vacuum pump described in the utility model, a connecting column is protruding from the lower end of the middle cover, and a connecting hole is opened in the area of ​​the lower cover located within the circumferential retaining wall, which is threadedly connected to the connecting column through a bolt passing through the connecting hole. The structure is simple and easy to install and disassemble.

[0012] Furthermore, in the vacuum pump anti-dumping and oil leakage device described in the present invention, an annular lower sealing paper gasket is sandwiched between the middle cover and the lower cover. The lower sealing paper gasket is provided with a paper gasket outlet connected to the middle cover outlet. This further enhances the sealing and leak-proofing effect without blocking the oil passage, preventing oil from leaking from the gap between the middle cover and the lower cover.

[0013] Furthermore, in the anti-dumping and oil leakage device for a vacuum pump described in the utility model, the lower connecting port and the oil outlet of the oil tank, and the upper connecting port and the collector are connected by threads.

[0014] Furthermore, in the anti-dumping and oil leakage device for a vacuum pump described in the utility model, sealing rings are provided between the lower connecting port and the oil outlet of the oil tank, and between the upper connecting port and the collector to enhance the sealing and leak-proof properties.

[0015] Furthermore, in the anti-dumping and oil leakage device for a vacuum pump described in the utility model, the flow channel is spirally ascending from the lower cover inlet to the middle cover outlet.

[0016] The beneficial effects of the utility model are:

[0017] The utility model has a good anti-dumping and oil leakage effect. A labyrinth oil path is formed by the lower connecting port, the lower cover inlet, the flow channel, the middle cover outlet and the upper connecting port. When the vacuum pump is tilted along the X direction and the Y direction, the vacuum pump oil will not enter the middle cover outlet from the flow channel after entering the flow channel, thereby effectively preventing the vacuum pump oil in the oil tank from overflowing, eliminating oil leakage, and bringing great convenience to the use, storage and transportation of the vacuum pump.

[0018] 2. The utility model is designed with a threaded connection port that matches the oil outlet of the oil tank and the trap. It can be directly installed between the oil outlet of the oil tank and the trap to prevent dumping and oil leakage. It has higher adaptability and does not require changing the oil tank or the trap. It can be used as an optional accessory for a vacuum pump, and has higher application flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the vacuum pump structure in the prior art.

[0020] Figure 2 It is a cross-sectional schematic diagram of a vacuum pump in the prior art when it is tilted along the X direction.

[0021] Figure 3 Schematic diagram of the connection structure of the utility model with the oil tank and the collector.

[0022] Figure 4 It is a schematic diagram of the cutaway structure of the present utility model.

[0023] Figure 5 It is a schematic diagram of the explosion structure of the utility model.

[0024] Figure 6 It is a schematic diagram of the flow direction of the flow channel of the present invention. DETAILED DESCRIPTION

[0025] The present invention will now be further described with reference to the accompanying drawings:

[0026] Reference Figure 3-Figure 5 As shown in the figure, the anti-dumping and oil leakage device for a vacuum pump according to this embodiment comprises a pump body 1, an oil tank 2, and a trap 3. The anti-dumping and oil leakage device 4 is connected between the oil tank 2 and the trap 3 and comprises, from bottom to top, a lower cover 5, a middle cover 6, and an upper cover 7. The lower end of the lower cover 5 is provided with a lower connecting port 5a connected to the oil outlet of the oil tank 2. The lower connecting port 5a is threadedly connected to the oil outlet of the oil tank 2, with a sealing ring 10 disposed therebetween.

[0027] Reference Figure 4 and Figure 5 As shown, the lower cover 5 is provided with a circumferential retaining wall 5b with an opening. One side of the opening extends to the outer circumferential wall of the lower cover 5 to form a closed end 5d. The middle cover 6, the outer circumferential wall of the lower cover 5, and the circumferential retaining wall 5b together enclose a flow channel 5c. The lower cover 5 has a lower cover inlet 5e defined within the circumferential retaining wall 5b, and the middle cover 6 has a middle cover outlet 6a corresponding to the closed end 5d. The upper cover 7 is provided with an upper connection port 7a connected to the collector 3. The upper connection port 7a is threadedly connected to the collector 3, with a sealing ring 10 interposed therebetween. The lower connection port 5a, lower cover inlet 5e, flow channel 5c, middle cover outlet 6a, and upper connection port 7a are sequentially connected. The flow channel spirals upward from the lower cover inlet to the middle cover outlet.

[0028] The lower cover 5 and middle cover 6, as well as the middle cover 6 and upper cover 7, are detachably connected. An upper sealing paper gasket 8 is sandwiched between the upper cover 7 and the middle cover 6. The upper sealing paper gasket 8 is hollow and annular and does not cover the middle cover outlet 6a. The center area of ​​the upper sealing paper gasket 8 is connected to the upper connection port 7a. Bolts penetrate the middle cover 6 and the upper sealing paper gasket 8 and are threadedly connected to the upper cover 7. A connecting post 6b protrudes from the lower end of the middle cover 6. A connecting hole 5f is defined within the circumferential retaining wall 5b of the lower cover 5. Bolts penetrate the connecting hole 5f and are threadedly connected to the connecting post 6b. An annular lower sealing paper gasket 9 is sandwiched between the middle cover 6 and the lower cover 5. The lower sealing paper gasket 9 is provided with a paper gasket outlet 9a that communicates with the middle cover outlet 6a.

[0029] The anti-dumping and oil leakage device described in this embodiment is an external installation form, which is tightly fixed to the oil tank through threads and sealing rings. At the same time, the upper end is connected to a conventional collector through threads and sealing rings. It is only necessary to design the threads of the lower connecting port 5a and the upper connecting port 7a according to the threads of the oil outlet of the oil tank and the collector. There is no need to change the structure of the oil tank 2 and the collector 3, and it can be used as an optional accessory. It has strong adaptability and is more flexible and convenient to use.

[0030] like Figure 6 As shown, after being poured out, the oil in the oil tank 2 must bypass the highest point of the flow channel 5c as shown by the arrow before it can flow into the collector 3. This height is higher than the center height of the vacuum pump, which can prevent the vacuum pump oil from leaking out of the collector 3.

[0031] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, any equivalent modifications or alterations made by a person skilled in the art without departing from the spirit and technical concepts disclosed in this utility model are encompassed by the claims of this utility model.

Claims

1. An anti-dumping and oil leakage device for a vacuum pump, the vacuum pump comprising a pump body, an oil tank and a collector, characterized in that: The anti-dumping and oil leakage device is connected between the oil tank and the collector, and includes a lower cover, a middle cover, and an upper cover arranged in sequence from bottom to top; the lower end of the lower cover is provided with a lower connecting port connected to the oil outlet of the oil tank; the lower cover is provided with a circumferential retaining wall with an opening, one side of the opening extends to the outer circumferential wall of the lower cover to form a closed end, the middle cover and the outer circumferential wall of the lower cover and the circumferential retaining wall are jointly enclosed to form a flow channel, the area of ​​the lower cover located within the circumferential retaining wall is provided with a lower cover inlet, and the middle cover is provided with a middle cover outlet at the corresponding closed end position; the upper cover is provided with an upper connecting port connected to the collector; the lower connecting port, lower cover inlet, flow channel, middle cover outlet, and upper connecting port are connected in sequence.

2. The anti-dumping and oil leakage device for a vacuum pump according to claim 1, characterized in that: The lower cover and the middle cover, as well as the middle cover and the upper cover are connected in a detachable manner.

3. The anti-dumping and oil leakage device for a vacuum pump according to claim 1, characterized in that: An upper sealing paper pad is sandwiched between the upper cover and the middle cover.

4. The anti-dumping and oil leakage device for a vacuum pump according to claim 3, characterized in that: The upper sealing paper gasket is hollow and annular and does not cover the middle cover outlet. The central area of ​​the upper sealing paper gasket is connected to the upper connection port, and is threadedly connected to the upper cover through bolts penetrating the middle cover and the upper sealing paper gasket.

5. The anti-dumping and oil leakage device for a vacuum pump according to claim 2, characterized in that: A connecting column is protruded from the lower end of the middle cover, and a connecting hole is opened in the area of ​​the lower cover located inside the circumferential retaining wall, and a bolt is passed through the connecting hole to be threadedly connected to the connecting column.

6. The anti-dumping and oil leakage device for a vacuum pump according to claim 1, 2 or 5, characterized in that: An annular lower sealing paper pad is sandwiched between the middle cover and the lower cover, and the lower sealing paper pad is provided with a paper pad outlet communicated with the middle cover outlet.

7. The anti-dumping and oil leakage device for a vacuum pump according to claim 1, characterized in that: The lower connecting port and the oil outlet of the oil tank, and the upper connecting port and the collector are connected through threads.

8. The anti-dumping and oil leakage device for a vacuum pump according to claim 7, characterized in that: Sealing rings are provided between the lower connecting port and the oil outlet of the oil tank, and between the upper connecting port and the collector.

9. The anti-dumping and oil leakage device for a vacuum pump according to claim 1, characterized in that: The flow channel rises in a spiral shape from the lower cover inlet to the middle cover outlet.

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