A roots screw vacuum unit and a case structure thereof

Abstract

The application relates to the technical field of vacuum pumps, and provides a Roots screw vacuum unit and a case structure thereof, which comprises a chassis, a connecting plate, a partition plate and an upper cover plate; the partition plate is one or more, the multiple partition plates, the chassis and the upper cover plate are arranged at intervals along the height direction; a first containing cavity for mounting a screw vacuum pump is formed between the chassis and the adjacent partition plate; a second containing cavity for mounting a Roots vacuum pump is formed between two adjacent partition plates; the partition plate is provided with an output port for communicating the first containing cavity and the second containing cavity or the adjacent second containing cavity; and the upper cover plate is provided with an input port for communicating the outside. The case structure is modularized, so that the Roots screw vacuum unit is convenient to assemble. The Roots screw vacuum unit has the characteristics of small floor space and high integration.

Description

Technical Field

[0001] This application relates to the field of vacuum pump technology, specifically to a Roots screw vacuum unit and its casing structure. Background Technology

[0002] With the continuous development of industry, the requirements for vacuum environments in industrial production are also increasing. Roots-screw vacuum units are vacuum devices that coordinate the use of Roots pumps and screw pumps. In practical applications, multiple Roots pumps can be connected in series with a single screw pump to form a unit. In this series structure, gas is first drawn in by the frontmost Roots pump, compressed, and then discharged to the next stage Roots pump. After being compressed stage by stage, the gas is finally discharged to the atmosphere by the front screw pump. Each stage of the Roots pump operates within its optimal working pressure range, thus achieving an overall performance improvement.

[0003] However, the current lack of modular chassis designs that integrate Roots screw vacuum units in the industry leads to low assembly efficiency. For example, Chinese patent document CN220622173U discloses a Roots screw vacuum pump unit.

[0004] Based on this, the technical problem to be solved in this application is: how to solve the problem of difficult assembly of Roots screw vacuum units. Summary of the Invention

[0005] To address the aforementioned technical problems, this application provides a Roots screw vacuum unit and its chassis structure. This chassis structure features a modular design, facilitating the assembly of the Roots screw vacuum unit. Furthermore, the Roots screw vacuum unit of this application is characterized by its small footprint and high integration.

[0006] The technical solution of this application is:

[0007] A casing structure for a Roots screw vacuum unit has dimensions in the length, width, and height directions, including a base frame, connecting plates, partitions, and a top cover plate. The base frame includes longitudinal plates and transverse plates. Two longitudinal plates extend along the length direction and are spaced apart along the width direction. Two transverse plates extend along the width direction and are connected at both ends to the longitudinal plates on both sides. A cavity for installing a silencer is provided between the two longitudinal plates.

[0008] The connecting plate includes a first upright plate and a second upright plate; the first upright plate and the second upright plate are arranged at a distance along the length direction; one end of the base frame is connected to the first upright plate, and the other end of the base frame is connected to the second upright plate;

[0009] The partition is one or more, and the partitions, the base frame, and the top cover are arranged at intervals along the height direction; a first receiving cavity for mounting a screw vacuum pump is formed between the base frame and adjacent partitions; a second receiving cavity for mounting a Roots vacuum pump is formed between two adjacent partitions; each partition is provided with an output port connecting the first receiving cavity and the second receiving cavity or an adjacent second receiving cavity; the top cover is provided with an input port connecting to the outside.

[0010] The aforementioned casing structure of the Roots screw vacuum unit also includes an electrical control box, which is connected to one side of the base frame along its length; the electrical control box has a third receiving cavity for installing electrical components.

[0011] The aforementioned casing structure of the Roots screw vacuum unit also includes two sealing plates, which are arranged at a distance from each other. The two ends of each sealing plate are respectively connected to the first vertical plate and the second vertical plate.

[0012] In the aforementioned chassis structure of the Roots screw vacuum unit, the projection of the base frame along the height direction is a "U" shaped structure.

[0013] In the aforementioned chassis structure of the Roots screw vacuum unit, the partition plate also has wiring holes; these wiring holes are used to arrange the wiring between the electrical control box and the screw vacuum pump and the Roots vacuum pump.

[0014] In the aforementioned chassis structure of the Roots screw vacuum unit, the base frame further includes a bracket; the two ends of the bracket are respectively connected to the longitudinal plates on both sides; the bracket has an arc portion; the arc portion matches the shape and size of the silencer; there are multiple brackets; the multiple brackets are arranged at intervals along the length direction and are used to support the silencer.

[0015] The aforementioned Roots screw vacuum unit chassis structure also includes a support base; there are multiple support bases, and the multiple support bases are connected to the bottom of the base frame.

[0016] The aforementioned Roots screw vacuum unit chassis structure also includes rollers; there are multiple rollers, and the multiple rollers are connected to the bottom of the base frame.

[0017] Furthermore, this application also provides a Roots screw vacuum unit, including a Roots vacuum pump, a screw vacuum pump, a silencer, and the aforementioned chassis structure of the Roots screw vacuum unit; the screw vacuum pump is located in the first receiving cavity; the screw vacuum pump is mounted on the base frame; there are one or more Roots vacuum pumps, and the plurality of Roots vacuum pumps are respectively arranged in a plurality of second receiving cavities; the Roots vacuum pump is mounted on the partition plate; along the height direction, the output end of the upper Roots vacuum pump and the input end of the lower Roots vacuum pump are connected, and the input end of the screw vacuum pump is connected to the output end of its adjacent Roots vacuum pump; the silencer is located in the cavity; the silencer is connected to the output end of the screw vacuum pump.

[0018] This application has at least one of the following advantages or beneficial effects:

[0019] The chassis structure of this application is modularly designed, which facilitates the assembly of the Roots screw vacuum unit. It mainly includes a base frame, connecting plate, partition plate and top cover plate. The base frame, partition plate and top cover plate can form a first receiving cavity and multiple second receiving cavities arranged vertically. In actual design, a multi-stage Roots vacuum pump can be set up by simply changing the height of the connecting plate and increasing the number of partition plates accordingly.

[0020] The Roots screw vacuum unit of this application has the characteristics of small footprint and high integration. Attached Figure Description

[0021] Figure 1 This is a three-dimensional exploded view of the casing structure of the Roots screw vacuum unit according to Embodiment 1 of this application;

[0022] Figure 2 This is a perspective view of the chassis structure of the Roots screw vacuum unit according to Embodiment 1 of this application;

[0023] Figure 3 This is a three-dimensional schematic diagram of the chassis structure of the Roots screw vacuum unit according to Embodiment 1 of this application;

[0024] Figure 4 This is a perspective view of the first vertical plate of the chassis structure of the Roots screw vacuum unit according to Embodiment 1 of this application;

[0025] Figure 5 This is a perspective view of the second vertical plate of the chassis structure of the Roots screw vacuum unit of Embodiment 1 of this application;

[0026] Figure 6 This is a three-dimensional schematic diagram of the partition of the chassis structure of the Roots screw vacuum unit according to Embodiment 1 of this application;

[0027] Figure 7This is a perspective view of the upper cover plate of the casing structure of the Roots screw vacuum unit according to Embodiment 1 of this application;

[0028] Figure 8 This is a three-dimensional schematic diagram of the sealing plate of the casing structure of the Roots screw vacuum unit according to Embodiment 1 of this application;

[0029] Figure 9 This is a front view of the internal structure of the Roots screw vacuum unit according to Embodiment 1 of this application;

[0030] Figure 10 This is a side view of the internal structure of the Roots screw vacuum unit according to Embodiment 1 of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] Base frame 1; Longitudinal plate 11; Cavity 110; Horizontal plate 12; Bracket 13; Connecting plate 2; First vertical plate 21; Opening 211; Second vertical plate 22; Through hole 221; Partition 3; Output port 301; Cable routing hole 302; Top cover plate 4; Input port 401; Electrical control box 5; Sealing plate 6; Slot block 61; Locking block 62; Locking head 63; Support base 7; Roller 8; First mounting hole 101; Second mounting hole 102; Third mounting hole 103; First receiving cavity 100; Second receiving cavity 200; Third receiving cavity 300; Roots vacuum pump A; Screw vacuum pump B; Silencer C; Height direction Z; Length direction X; Width direction Y. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0034] Example 1

[0035] like Figure 1 , 2 As shown, an embodiment of this application provides a chassis structure for a Roots screw vacuum unit, which has a length direction, a width direction and a height direction, including a base frame 1, a connecting plate 2, a partition plate 3 and a top cover plate 4;

[0036] refer to Figure 3The base frame 1 includes longitudinal plates 11 and transverse plates 12; the longitudinal plates 11 extend along the length direction, and there are two longitudinal plates 11, which are arranged at a distance along the width direction; the transverse plates 12 extend along the width direction, and the two ends of the transverse plates 12 are respectively connected to the longitudinal plates 11 on both sides; a cavity 110 for installing a muffler is provided between the two longitudinal plates 11; preferably, the projection of the base frame 1 along the height direction is a "U" shaped structure, that is, the two ends of the transverse plates 12 are respectively connected to the ends of the two longitudinal plates 11. With this design, the cavity 110 is formed between the longitudinal plates 11 without the need to process the cavity 110 separately, which improves the modularity. More preferably, the base frame 1 further includes a bracket 13; both ends of the bracket 13 are respectively connected to the longitudinal plates 11 on both sides; the bracket 13 has an arc portion; the arc portion matches the shape and size of the muffler; there are multiple brackets 13 (only one bracket 13 is shown in the figure), and the multiple brackets 13 are arranged at intervals along the length direction and are used to support the muffler. In practical applications, the outer circular surface of the muffler can be placed on the arc portion of the bracket 13 to achieve a supporting function.

[0037] Regarding the base frame 1, it should be further explained that: the upper surfaces of both the longitudinal plate 11 and the transverse plate 12 are provided with multiple first mounting holes 101. During assembly, workers insert bolts through the screw vacuum pump and the first mounting holes 101, and then tighten the nuts to stably mount the screw vacuum pump onto the base frame 1. Furthermore, the number and position of the first mounting holes 101 are determined based on the actual screw vacuum pump model selected.

[0038] refer to Figure 4 , 5 The connecting plate 2 includes a first upright plate 21 and a second upright plate 22; the first upright plate 21 and the second upright plate 22 are arranged at a distance along the length direction; one end of the base frame 1 is connected to the first upright plate 21, and the other end of the base frame 1 is connected to the second upright plate 22; in practical applications, the first upright plate 21 is provided with an opening 211, the opening 211 corresponds to the position of the cavity 110, and the output end of the sound absorber in the cavity 110 extends outward from the opening 211.

[0039] Regarding the connecting plate 2, it should be further explained that: the first upright plate 21 and the second upright plate 22 are provided with a plurality of second mounting holes 102. Similar to the first mounting holes 101 mentioned above, the second mounting holes 102 are used to install the first upright plate 21 and the second upright plate 22 onto the base frame 1 by bolt locking; in addition, the first upright plate 21 and the second upright plate 22 are also provided with a plurality of third mounting holes 103. The third mounting holes 103 are used to install the partition plate 3 described below.

[0040] refer to Figure 6This embodiment uses a partition 3 to illustrate the structural features. In practical applications, a Roots vacuum pump can be added adaptably according to the required vacuum level, so there can be one or more partitions 3. The multiple partitions 3, the base frame 1, and the upper cover plate 4 are arranged at intervals along the height direction. A first receiving cavity 100 for mounting a screw vacuum pump is formed between the base frame 1 and the adjacent partitions 3. A second receiving cavity 200 for mounting a Roots vacuum pump is formed between two adjacent partitions 3. Each partition 3 is provided with an output port 301 that connects the first receiving cavity 100 and the second receiving cavity 200 or an adjacent second receiving cavity 200.

[0041] refer to Figure 7 The upper cover plate 4 is provided with an input port 401 that connects to the outside.

[0042] In this embodiment, an electrical control box 5 is also included, with one side of the base frame 1 along its length connected to the electrical control box 5; the electrical control box 5 has a third receiving cavity 300 for installing electrical components. In this design, the second upright plate 22 is also provided with a through hole 221 for wiring between the electrical control box 5 and the Roots vacuum pump and the screw vacuum pump. Similarly, the partition plate 3 also has a wiring hole 302 for arranging wiring between the electrical control box 5 and the screw vacuum pump and the Roots vacuum pump.

[0043] refer to Figure 8 Preferably, it further includes a sealing plate 6, wherein there are two sealing plates 6, and the two sealing plates 6 are arranged at a distance from each other; the two ends of the sealing plates 6 are respectively connected to the first upright plate 21 and the second upright plate 22.

[0044] Further explanation is needed regarding the sealing plate 6: The sealing plate 6 is fixed by a snap-fit ​​method. The sealing plate 6 is provided with a groove block 61, a snap block 62 and a snap head 63. When the sealing plate 6 is snapped in, the groove block 61 and the partition plate 3 are pressed together, the snap block 62 passes through the longitudinal block, and the movable end of the snap head 63 is snapped in with the upper cover plate 4.

[0045] To ensure stability and ease of transport, the system preferably includes support bases 7 and rollers 8; multiple support bases 7 are connected to the bottom of the base frame 1. Multiple rollers 8 are also connected to the bottom of the base frame 1.

[0046] Example 2

[0047] refer to Figure 9 , 10Furthermore, this application also provides a Roots screw vacuum unit, including a Roots vacuum pump A, a screw vacuum pump B, a silencer C, and the aforementioned chassis structure of the Roots screw vacuum unit; the screw vacuum pump B is located in the first receiving cavity 100; the screw vacuum pump B is mounted on the base frame 1; there is one Roots vacuum pump A, which is arranged in the second receiving cavity 200; the Roots vacuum pump A is mounted on the partition plate 3; along the height direction, the output end of the upper Roots vacuum pump A is connected to the input end of the lower Roots vacuum pump A, and the input end of the screw vacuum pump B is connected to the output end of its adjacent Roots vacuum pump A; the silencer C is located in the cavity 110; the silencer C is connected to the output end of the screw vacuum pump B.

[0048] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A casing structure of a Roots screw vacuum unit having a length direction, a width direction, and a height direction, characterized by, Comprises an underframe, a connecting plate, partition plates and an upper cover plate; the underframe comprises longitudinal plates and a transverse plate; the longitudinal plates extend along the length direction, there are two longitudinal plates, and the two longitudinal plates are arranged at intervals along the width direction; the transverse plate extends along the width direction, and two ends of the transverse plate are respectively connected to the longitudinal plates on both sides; a cavity for installing a muffler is provided between the two longitudinal plates; The connecting plate comprises a first vertical plate and a second vertical plate; the first vertical plate and the second vertical plate are arranged at intervals along the length direction; one end of the underframe is connected with the first vertical plate, and the other end of the underframe is connected with the second vertical plate; There are one or more partition plates, and the plurality of partition plates, the underframe and the upper cover plate are arranged at intervals along the height direction; a first accommodating cavity for installing a screw vacuum pump is formed between the underframe and an adjacent partition plate; a second accommodating cavity for installing a Roots vacuum pump is formed between two adjacent partition plates; each partition plate is provided with an output port that communicates the first accommodating cavity with the second accommodating cavity or communicates adjacent second accommodating cavities; the upper cover plate is provided with an input port communicating with the outside.

2. The casing structure of a Roots screw vacuum unit according to claim 1, characterized by Further comprises an electric control box, one side of the underframe along the length direction is connected with the electric control box; the electric control box has a third accommodating cavity for installing electrical elements.

3. The casing structure of a Roots screw vacuum unit according to claim 1, characterized by Further comprises sealing plates, there are two sealing plates, and the two sealing plates are arranged at intervals; two ends of each sealing plate are respectively connected to the first vertical plate and the second vertical plate.

4. The casing structure of a Roots screw vacuum unit according to claim 1, characterized by The projection of the underframe along the height direction is a "凵"-shaped structure.

5. The casing structure of a Roots screw vacuum unit according to claim 2, wherein The partition plate is further provided with a wiring hole; the wiring hole is used for arranging connecting wires between the electric control box and the screw vacuum pump as well as the Roots vacuum pump.

6. The casing structure of a Roots screw vacuum unit according to claim 1, wherein The underframe further comprises brackets; two ends of each bracket are respectively connected to the longitudinal plates on both sides; the bracket has an arc portion; the shape and size of the arc portion match those of the muffler; there are a plurality of brackets; the plurality of brackets are arranged at intervals along the length direction and are used for supporting the muffler.

7. The Roots screw vacuum unit housing structure according to claim 1, wherein Further comprises support seats; there are a plurality of support seats, and the plurality of support seats are connected to the bottom of the underframe.

8. The casing structure of a Roots screw vacuum unit according to claim 7, characterized in that, Further comprises rollers; there are a plurality of rollers, and the plurality of rollers are connected to the bottom of the underframe.

9. A Roots screw vacuum unit, characterized by Comprises a Roots vacuum pump, a screw vacuum pump, a muffler and the chassis structure of the Roots-screw vacuum unit according to any one of claims 1 to 8; the screw vacuum pump is located in the first accommodating cavity; the screw vacuum pump is arranged on the underframe; there are one or more Roots vacuum pumps, and the plurality of Roots vacuum pumps are respectively arranged in the plurality of second accommodating cavities; the Roots vacuum pump is arranged on the partition plate; along the height direction, the output end of the Roots vacuum pump located at the upper part is connected with the input end of the Roots vacuum pump located at the lower part, and the input end of the screw vacuum pump is connected with the output end of the adjacent Roots vacuum pump; the muffler is located in the cavity, and the muffler is connected with the output end of the screw vacuum pump.

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