Screw vacuum unit suitable for oil mist recovery

Abstract

The utility model discloses a screw vacuum unit suitable for oil mist recovery, which comprises a shell, a pair of screws, a driving device and a heat dissipation device, and the screws are respectively a first screw and a second screw; the screw rods are rotationally mounted in the shell and are matched with each other; the screw is of a hollow structure so that a channel can be formed in the screw, the output end of the driving device is fixedly connected with the first end of the first screw in a sealed mode, and the heat dissipation device is installed on the side portion of the shell and matched with the first end of the screw. The heat dissipation screw rod has the beneficial effects that the two screw rods are arranged in a hollow mode, under the action of the heat dissipation device, a heat absorption medium can be conveyed into the screw rods and discharged under the action of the heat dissipation device, then direct heat dissipation of the screw rods is achieved, the screw rods can be prevented from being damaged due to high temperature, and the service life of the screw rods is prolonged. And the working efficiency and the stability of the screw vacuum unit can be improved.

Description

Technical Field

[0001] This application relates to the field of vacuum equipment technology, and in particular to a screw vacuum unit suitable for oil mist recovery. Background Technology

[0002] The oil mist recovery system is used to treat oil mist exhaust gas from cold-rolled foil rolling mills. It mainly consists of the following subsystems: absorption system, degassing system, filtration unit, heat exchange unit, desorption system, finished product unit, vacuum unit, heating unit, and control system. The heating and vacuum units are the key equipment of the system, and these two parts are related to the success or failure of the entire oil mist recovery. The existing vacuum pump generally adopts a design of a single-stage Roots pump plus a vacuum screw pump (refer to the patent CN217646164U).

[0003] A screw vacuum pump is a pumping device that uses a pair of screws rotating synchronously at high speed in opposite directions within a pump casing to generate suction and exhaust. During operation, the rotating screws draw the gas into the pump chamber and compress it to the exhaust end. Due to thermal compression, the gas temperature rises rapidly. To prevent pump damage, a heat dissipation device is typically installed on the outer casing. However, existing heat dissipation devices only provide external cooling and cannot directly cool the internal screws, resulting in relatively poor heat dissipation. Therefore, this paper proposes a screw vacuum unit suitable for oil mist recovery to solve the aforementioned technical problems. Utility Model Content

[0004] One of the objectives of this application is to provide a screw vacuum unit suitable for oil mist recovery.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a screw vacuum unit suitable for oil mist recovery, comprising a housing, a pair of screws, a drive device, and a heat dissipation device, wherein the screws are a first screw and a second screw; the screws are rotatably installed inside the housing and cooperate with each other; the screws are hollow structures to form channels inside; the output end of the drive device is fixedly connected to the first end of the first screw; the heat dissipation device is installed on the side of the housing and cooperates with the first end of the screw; the heat dissipation device is adapted to transport the heat-absorbing medium from the first end of the screw to the channel, so that the heat-absorbing medium absorbs heat and is discharged from the second end of the screw.

[0006] Preferably, the first screw has a groove communicating with the channel on its outer side near the first end. The heat dissipation device includes a first cylinder and a second cylinder. The first cylinder is fixedly installed on the side of the housing and sealed to the first end of the first screw. The groove is located inside the first cylinder. The second cylinder is fixedly installed on the side of the housing and communicates with the first end of the second screw. When dissipating heat, the heat-absorbing medium is suitable for being injected into the interior of the first cylinder and the interior of the second cylinder.

[0007] Preferably, there are multiple grooves, and the grooves are distributed equidistantly around the outside of the first screw.

[0008] Preferably, the heat dissipation device further includes a third cylinder and a fourth cylinder, both of which are fixedly installed on the other side of the housing and are respectively connected to the second end of the first screw and the second screw, so that the heat-absorbing medium is discharged from the outlet of the third cylinder and the fourth cylinder.

[0009] Preferably, the heat dissipation device further includes a heat dissipation shroud, which has a cavity inside. The heat dissipation shroud is sleeved and installed outside the housing and corresponds to the screw. The exterior of the heat dissipation shroud is provided with an inlet and a vent. The heat-absorbing medium is adapted to pass through the inlet, the cavity and the vent in sequence to dissipate heat from the housing.

[0010] Preferably, the heat sink includes a pair of half-shells that are detachably connected and fitted together.

[0011] Preferably, the half-shell has an inner cavity, and both ends of one half-shell are provided with insertion tubes communicating with the inner cavity, and both ends of the other half-shell are provided with slots communicating with the inner cavity; the inner cavity is adapted to form the cavity body by the cooperation of the insertion tubes and the slots.

[0012] Preferably, a partition is provided inside the cavity, the inlet and the outlet are both located on the same side of the heat sink, and the inlet and the outlet are respectively located on opposite sides of the partition.

[0013] Compared with the prior art, the beneficial effects of this application are as follows:

[0014] This invention, by hollowing out the two screws and using a heat dissipation device, allows the heat-absorbing medium to be transported to and discharged from the screws, thus achieving direct heat dissipation for the screws themselves. This not only prevents the screws from being damaged by high temperatures but also improves the working efficiency and stability of the screw vacuum unit. At the same time, the hollow design reduces the weight of the screws, thereby reducing their inertia during rotation, reducing energy consumption, and saving on screw production costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the overall assembly structure of the screw and heat dissipation device of this utility model.

[0017] Figure 3 This is a schematic diagram showing the specific cooperation structure between the screw and the heat dissipation device of this utility model.

[0018] Figure 4 For the present utility model Figure 3 A magnified schematic diagram of a portion of the structure.

[0019] Figure 5 This is a schematic diagram of the heat sink structure of this utility model.

[0020] Figure 6 This is a cross-sectional view of the heat sink structure of this utility model.

[0021] In the diagram: 1. Base; 2. Drive unit; 3. Housing; 4. Heat dissipation device; 401. Cylinder 1; 402. Cylinder 2; 403. Cylinder 3; 404. Cylinder 4; 405. Heat dissipation cover; 4051. Half cover; 5. First screw; 6. Second screw; 7. Channel; 8. Groove; 9. Inlet; 10. Drain; 11. Partition; 12. Inner cavity; 13. Insert tube; 14. Slot. Detailed Implementation

[0022] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0024] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0025] One preferred embodiment of this application, such as Figures 1 to 6 As shown, a screw vacuum unit suitable for oil mist recovery includes a housing 3, a pair of screws, a drive unit 2, and a heat dissipation device 4. The housing 3 and the drive unit 2 can be installed at the top two sides of the base 1. The pair of screws are a first screw 5 and a second screw 6, which are rotatably installed in the housing 3 and cooperate with each other. The screws are hollow to form a channel 7 inside. The output end of the drive unit 2 is fixedly and sealed with the first end of the first screw 5. The heat dissipation device 4 is installed on the side of the housing 3 and cooperates with the first end (left end) of the two screws.

[0026] It is understandable that, such as Figure 2 and Figure 3 As shown, when cooling the screw, the heat dissipation device 4 can transport the heat-absorbing medium from the first end of the screw into the channel 7, allowing the heat-absorbing medium to absorb the heat from the screw through heat transfer. The heat-absorbing medium is then discharged from the second end (right end) of the screw, thus achieving heat dissipation for the screw itself. This direct heat dissipation not only prevents damage to the screw due to high temperatures but also improves the working efficiency and stability of the screw vacuum unit. Furthermore, because the screw adopts a hollow structure, its weight is reduced while ensuring sufficient strength and diameter requirements. This reduces the inertia of the screw during rotation, thereby reducing energy consumption and improving the energy-saving effect of the equipment.

[0027] It should be noted that the drive device 2, i.e., the motor, is connected to the two rotating screws by a gear set. The motor, in conjunction with the gear set, drives the two screws to rotate, thereby realizing the delivery of gas. This is common knowledge known to those skilled in the art.

[0028] In one embodiment of this application, such as Figure 3 and Figure 4 As shown, the heat dissipation device 4 includes a first cylinder 401 and a second cylinder 402. It should be understood that since the second screw 6 is not directly connected to the drive device 2, the way to transport the heat-absorbing medium to its channel 7 when the second screw 6 rotates is as follows: the second cylinder 402 is fixedly and sealed on the side of the housing 3, and the first end of the second screw 6 extends into the second cylinder 402, thereby realizing the communication between the channel 7 and the second cylinder 402. At this time, it is only necessary to inject the heat-absorbing medium into the second cylinder 402.

[0029] The first screw 5 is connected to the output end of the drive device 2. Therefore, when the first screw 5 rotates, the heat-absorbing medium can be transported to its channel 7 in the following way: a groove 8 communicating with the channel 7 is provided on the outside of the first screw 5 near the first end. The cylinder 401 is fixedly and sealed on the side of the housing 3, and the cylinder 401 is sealed and fitted at the first end of the first screw 5. The groove 8 is located inside the cylinder 401. At this time, as long as the heat-absorbing medium is injected into the cylinder 401, the heat-absorbing medium will enter the channel 7 from the groove 8.

[0030] It should be noted that the heat-absorbing medium can be a gas or a liquid, such as air, cooling water, or oil. When using gas cooling, a gas pump and a gas pipe can be used to transport and inject the heat-absorbing medium. When using liquid cooling, a water pump and a water pipe can be used to transport and inject the heat-absorbing medium.

[0031] Furthermore, the heat-absorbing medium within the first screw 5 is transported through the tank 8, meaning the transport efficiency of the heat-absorbing medium is positively correlated with the size of the tank 8. Since the tank 8 is located outside the first screw 5, increasing the transport efficiency by enlarging the orifice of the tank 8 could significantly impact the strength of the first screw 5. Therefore... Figure 4 As shown, when using a small-diameter trough 8, the number of troughs 8 can be increased, that is, multiple troughs 8 can be set, and the troughs 8 are distributed equidistantly around the outside of the first screw 5. This not only improves the conveying efficiency of the heat-absorbing medium, but also ensures that the strength of the first screw 5 is not greatly affected.

[0032] In this embodiment, as Figures 1 to 3 As shown, the heat dissipation device 4 also includes a third cylinder 403 and a fourth cylinder 404. Both cylinders 403 and 404 are fixedly and sealed on the other side of the housing 3. The second end (right end) of the first screw 5 extends into the third cylinder 403, and the second end (right end) of the second screw 6 extends into the fourth cylinder 404. Since the screws rotate during operation, the discharged heat-absorbing medium is not easily guided out. However, by using cylinders 403 and 404, the discharged heat-absorbing medium can be discharged through them. For example, a drain pipe can be connected to the outlet of each cylinder. Simultaneously, cylinders 403 and 404 also protect the second end of the screws, preventing external impurities from entering the screw channel 7 and ensuring stable operation of the screw vacuum unit.

[0033] Based on the above embodiments, the heat dissipation device 4 is designed to facilitate direct heat dissipation from the screw itself. However, the casing 3 of the screw vacuum pump also generates heat externally. Therefore, to further improve the heat dissipation effect, such as... Figure 5As shown, the heat dissipation device 4 also includes a heat dissipation cover 405, which has a cavity inside. The heat dissipation cover 405 is sleeved and installed on the outside of the housing 3 and corresponds to the screw. In other words, the part of the heat dissipation cover 405 that is sleeved corresponds to the spiral rotor position of the two screws.

[0034] It is understandable that an inlet 9 and a vent 10 are respectively provided on the outside of the heat sink 405; at this time, the heat-absorbing medium is injected into the cavity of the heat sink 405 through the inlet 9 to absorb the heat of the shell 3, and then discharged from the vent 10 to achieve heat dissipation of the shell 3.

[0035] Furthermore, to facilitate the disassembly of the heat sink 405 for convenient maintenance of the housing 3, such as... Figure 5 As shown, the heat sink 405 includes a pair of half-shells 4051, which are detachably connected. It can be understood that the two half-shells 4051 can be regarded as a "pair of clamp structures", that is, the two half-shells 4051 can be installed and removed by bolts.

[0036] Specifically, the two half-shells 4051 are fitted together as follows: Figure 6 As shown, an inner cavity 12 is provided inside the half-shell 4051. Both ends of one half-shell 4051 are provided with insertion tubes 13 communicating with its inner cavity 12, and both ends of the other half-shell 4051 are provided with slots 14 communicating with its inner cavity 12.

[0037] It is understandable that when installing the heat sink 405, the two ends of the heat sink 405 are connected to make the insertion tube 13 and the slot 14 fit together. Finally, the two ends of the heat sink 405 are tightened with bolts. In this way, the two inner cavities 12 can form the above-mentioned cavity through the cooperation of the insertion tube 13 and the slot 14.

[0038] Of course, the cavity mentioned above may encounter the following problem during actual heat dissipation: the heat-absorbing medium is difficult to fully pass through each area of ​​the cavity for discharge, which will affect the heat dissipation effect. Moreover, in order to make the flow range of the heat-absorbing medium larger, the designer usually sets the inlet 9 and the outlet 10 on opposite sides of the heat dissipation shroud 405, which will also make the pipeline of the heat-absorbing medium more complicated and not conducive to the layout.

[0039] Therefore, in order to solve the above-mentioned technical problems, in one embodiment of this application, such as Figure 6 As shown, a partition 11 is provided in the cavity. At this time, the inlet 9 and the outlet 10 can be located on the same side of the heat sink 405, and the inlet 9 and the outlet 10 are located above and below the partition 11, respectively.

[0040] Understandably, the original cavity was a closed, encircling structure. However, after the partition 11 was installed, the inlet 9 corresponds to the beginning of the cavity, while the outlet 10 corresponds to the end of the cavity. This allows the heat-absorbing medium to pass through all parts of the cavity, thereby improving the heat dissipation effect. It also facilitates the layout of the pipeline.

[0041] The working principle of this utility model is as follows:

[0042] Taking the cooling water dissipation of a screw vacuum unit as an example, cylinder 1 (401), cylinder 2 (402), and inlet 9 are connected to a water pump via water pipes. Cylinder 3 (403), cylinder 4 (404), and outlet 10 are connected to a collection tank via water pipes. The water pump pumps cooling water into cylinder 1 (401), cylinder 2 (402), and inlet 9. The cooling water in cylinder 1 (401) enters the channel 7 inside the first screw 5 through the tank 8 and then exits from cylinder 3 (403). The cooling water in cylinder 2 (402) enters the channel 7 inside the gas chamber through the left end of the second screw 6 and then exits from cylinder 4 (404). The cooling water in the heat sink 405 enters through inlet 9, flows from the beginning to the end of the chamber, and finally exits from outlet 10 (as shown in the image). Figure 6 (As shown by the arrow in the image), this allows for heat dissipation both inside and outside the overall screw vacuum unit, greatly improving the heat dissipation effect.

[0043] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A screw vacuum package suitable for oil mist recovery, characterized in that include: case; A pair of screws, namely a first screw and a second screw; both screws are rotatably mounted inside the housing and cooperate with each other; The screw is a hollow structure so that a channel is formed inside it; A driving device, wherein the output end of the driving device is fixedly connected to the first end of the first screw; as well as A heat dissipation device is installed on the side of the housing and cooperates with the first end of the screw; the heat dissipation device is adapted to transport a heat-absorbing medium from the first end of the screw into the channel, so that the heat-absorbing medium absorbs heat and is discharged from the second end of the screw.

2. Screw vacuum package suitable for oil mist recovery according to claim 1, characterized in that: The first screw has a groove connected to the channel on its outer side near the first end. The heat dissipation device includes a first cylinder and a second cylinder. The first cylinder is fixedly installed on the side of the housing and sealed to the first end of the first screw. The groove is located inside the first cylinder. The second cylinder is fixedly installed on the side of the housing and connected to the first end of the second screw. When dissipating heat, the heat-absorbing medium is suitable for being injected into the interior of the first cylinder and the interior of the second cylinder.

3. Screw vacuum package suitable for oil mist recovery according to claim 2, characterized in that: The grooves are multiple and are equidistantly distributed around the outside of the first screw.

4. Screw vacuum package suitable for oil mist recovery according to claim 2 or 3, characterized in that: The heat dissipation device further includes a third cylinder and a fourth cylinder, both of which are fixedly installed on the other side of the housing and are respectively connected to the second end of the first screw and the second screw, so that the heat-absorbing medium is discharged from the outlet of the third cylinder and the fourth cylinder.

5. Screw vacuum package suitable for oil mist recovery according to claim 4, characterized in that: The heat dissipation device further includes a heat dissipation shroud, which has a cavity inside. The heat dissipation shroud is sleeved and installed outside the housing and corresponds to the screw. The exterior of the heat dissipation shroud is provided with an inlet and a vent. The heat-absorbing medium is adapted to pass through the inlet, the cavity and the vent in sequence to dissipate heat from the housing.

6. Screw vacuum package suitable for oil mist recovery according to claim 5, characterized in that: The heat sink includes a pair of half-shells that are detachably connected and fitted together.

7. Screw vacuum package suitable for oil mist recovery according to claim 6, characterized in that The half-shell has an inner cavity, and each end of one half-shell has a tube communicating with the inner cavity, and each end of the other half-shell has a slot communicating with the inner cavity; the inner cavity is adapted to form the cavity body by the cooperation of the tube and the slot.

8. Screw vacuum package suitable for oil mist recovery according to claim 7, characterized in that: A partition is provided inside the cavity. The inlet and the outlet are both located on the same side of the heat sink, and the inlet and the outlet are respectively located on opposite sides of the partition.

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