Rack structure of drawer type vacuum pump unit

Abstract

The invention belongs to the technical field of vacuum pumps, and relates to a rack structure of a drawer type vacuum pump unit. The upper mounting seat is arranged on the upper layer of the rack and is used for bearing the roots pump; the lower mounting base is arranged on the lower layer of the rack and used for bearing the backing pump, the lower mounting base is detachably connected with the rack through a fastener, the lower mounting base is downwards separated from the rack after being detached, and guide wheels and foot cups are arranged at the bottom of the lower mounting base; the guide rail is laid on the ground, is located under the guide wheels and is used for assisting the separated lower mounting seat to move out of or move into the rack; during normal use, a gap is reserved between the guide wheel and the guide rail, and the foot cup is in contact with the ground and forms a supporting structure of the lower mounting seat; after dismounting, the height of the foot cup is adjusted to drive the lower mounting base to move downwards, and the guide rail makes contact with the guide wheel to form a supporting structure of the lower mounting base. The rack structure of the drawer type vacuum pump unit can facilitate maintenance of the vacuum pump unit.

Description

Technical Field

[0001] The invention belongs to the technical field of vacuum pumps and relates to a frame structure of a drawer-type vacuum pump unit. Background Art

[0002] The vacuum pump unit usually includes a main pump, a fore pump, and necessary control systems and accessories, which work together to achieve higher efficiency and stability. The common vacuum pump unit is composed of a Roots pump as the main pump and a fore pump in series. After the fore pump is started, it can provide the initial vacuum environment required by the Roots pump, and then the Roots pump is started to further improve the vacuum level. In actual work, since the fore pump is used in a more severe environment, it is more prone to failure, but the existing rack structure places the fore pump in the lower layer of the rack, which is very inconvenient to repair.

[0003] Chinese utility model patent CN219774295U (publication date: 2023-09-29) includes two columns 1 and two columns 2, a crossbar is connected between the two columns 1 and the two columns 2, a connecting rod is connected between the columns 1 and 2, a guide rail is connected to the top of the columns 1 and 2, two support beams are arranged above the crossbar, a support frame is connected to the upper part of the support beam, a crossbeam is connected between the support beams, a bearing plate is arranged above the crossbeam, a fixed plate is connected to the outside of the support frame, a plurality of rotating seats are arranged on the outside of the fixed plate, a rotating shaft is connected to the outside of the rotating seat, a roller is rotatably arranged on the rotating shaft, and the roller is arranged in the guide rail. The base on which the vacuum pump is installed in the utility model is movable, and the vacuum pump can be pulled out of the machine during maintenance, so as to facilitate operation.

[0004] The frame structure of the vacuum pump unit, with the help of a combination of rollers and guide rails, can pull the base out of the frame during maintenance work to facilitate maintenance operations. However, the frame structure adopts an overall pull-out mode, and after the base is pulled out, the fore pump is still at the bottom of the base, which greatly limits the maintenance operation space, resulting in no substantial improvement in maintenance convenience.

[0005] In addition, the base of the above-mentioned vacuum pump unit is supported by rollers and guide rails. In view of the strong vibration generated during the operation of the vacuum pump unit, this supporting structure is difficult to provide stable mechanical support and can easily cause displacement or shaking during operation, thereby affecting the operating stability and reliability of the vacuum pump unit. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a frame structure of a drawer-type vacuum pump unit, which can facilitate the maintenance of the vacuum pump unit without affecting its operating stability and reliability.

[0007] In order to solve the above technical problems, the purpose of the present invention is achieved through the following technical solutions:

[0008] A frame structure of a drawer-type vacuum pump unit, comprising:

[0009] A frame;

[0010] An upper mounting seat, arranged on the upper layer of the frame and used for carrying a Roots pump;

[0011] A lower mounting seat, arranged on the lower layer of the frame and used for carrying a fore pump. The lower mounting seat is detachably connected to the frame through fasteners. After disassembly, the lower mounting seat moves downward away from the frame. Guide wheels and feet are arranged at the bottom of the lower mounting seat;

[0012] A guide rail, directly placed on the ground and located directly below the guide wheels, and used for assisting the lower mounting seat to move out of or into the frame. This simple guide rail can be stored when in normal use.

[0013] When in normal use, a gap is left between the guide wheels and the guide rail, and the feet contact the ground and form a support structure for the lower mounting seat; after disassembly, the height of the feet is adjusted to drive the lower mounting seat to move downward. After the guide rail contacts the guide wheels, a support structure for the lower mounting seat is formed.

[0014] In the above-mentioned frame structure of a drawer-type vacuum pump unit, the guide rail is distributed longitudinally along the frame and extends outside the frame, and the lower mounting seat moves out of the frame through the lateral gap of the frame.

[0015] Or, in the above-mentioned frame structure of a drawer-type vacuum pump unit, the guide rail is distributed transversely along the frame and extends outside the frame, and the lower mounting seat moves out of the frame through the longitudinal gap of the frame.

[0016] In the above-mentioned frame structure of a drawer-type vacuum pump unit, a pair of guide rails are arranged in parallel, and each guide rail is correspondingly provided with more than two guide wheels. A plurality of feet are arranged and located inside the guide rails and the guide wheels; further, at least four feet are arranged to form a four-point support structure.

[0017] In the above-mentioned frame structure of a drawer-type vacuum pump unit, a first mounting plate is arranged inside the lower layer of the frame, and a second mounting plate is arranged outside the lower mounting seat. The first mounting plate and the second mounting plate are fixedly connected through fasteners.

[0018] In the above-mentioned frame structure of a drawer-type vacuum pump unit, further, the first mounting plate penetrates through the frame, the second mounting plate penetrates through the lower mounting seat, the bottom of the first mounting plate is attached to the top of the second mounting plate and is fixed through fasteners; preferably, both the first mounting plate and the second mounting plate are arranged along the moving-out direction of the lower mounting seat.

[0019] In the above-mentioned frame structure of a drawer-type vacuum pump unit, further, both the first mounting plate and the second mounting plate are L-shaped plates. Their vertical sides are fixedly connected to the frame or the lower mounting base by welding respectively, and their horizontal sides are detachably fastened by bolts. A number of bolt mounting holes are correspondingly arranged on the horizontal sides of the first mounting plate and the second mounting plate.

[0020] In the above-mentioned frame structure of a drawer-type vacuum pump unit, the cross-section of the guide rail is V-shaped. A V-shaped groove matching with the top of the guide rail is arranged on the guide wheel along the circumferential direction. A guide wheel frame is fixed at the bottom of the lower mounting base, and the guide wheel is rotatably arranged on the guide wheel frame.

[0021] In the above-mentioned frame structure of a drawer-type vacuum pump unit, other structures can also be used for the guide rail and the guide wheel. For example, a guide groove is arranged on the guide rail along the moving direction, and the guide wheel is slidably arranged in the guide groove.

[0022] In the above-mentioned frame structure of a drawer-type vacuum pump unit, a foot cup frame is arranged at the bottom of the lower mounting base. The foot cup includes a foot pad, a screw rod and a nut. The screw rod is screwed into the threaded hole on the foot cup frame and the supporting height of the foot cup is adjusted by rotating the screw rod. The nut is screwed on the screw rod and abuts against the bottom of the foot cup frame to form a locking structure.

[0023] In the above-mentioned frame structure of a drawer-type vacuum pump unit, common types in the field can be used for the fore pump of the vacuum pump unit, such as sliding vane pump, rotary vane pump, screw pump, etc.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention provides a frame structure of a drawer-type vacuum pump unit. The lower mounting base for carrying the fore pump adopts a suspended detachable mounting structure, which cooperates with the guide rail guiding system. The two work together to realize the independent extraction and maintenance of the fore pump. During normal operation, the lower mounting base and the frame are rigidly connected by fasteners, and its structural stiffness and stability are equivalent to those of a traditional fixed frame, meeting the stringent working conditions requirements of a precision vacuum system.

[0026] 2. The present invention constructs a dual support state switching mode through adjustable foot cups: during the working state, the foot cups are in contact with the ground to form an auxiliary support structure. Cooperating with the rigid connection between the lower mounting base and the frame, it can effectively absorb the vibration during the operation of the pump unit and improve the operation reliability of the system; during the repair state, after removing the rigid connection between the lower mounting base and the frame, the foot cups can still effectively support the lower mounting base. Then, through the stepless fine-tuning function of the foot cups, the lower mounting base is driven to slowly descend, and finally it is switched to the guide rail support. The whole disassembly and removal process is slow and stable, avoiding the risk of shaking in traditional disassembly.

[0027] 3. The present invention provides a vertical / horizontal dual-guided removal structure, which can be flexibly selected according to the on-site installation space conditions of the vacuum pump unit to improve the adaptability of the product. Description of the Drawings

[0028] Figure 1 is a perspective view of Embodiment 1 of the present invention;

[0029] Figure 2 is a perspective view of the frame of Embodiment 1 of the present invention (the first state);

[0030] Figure 3 is Figure 2 a partially enlarged view of

[0031] Figure 4 is a perspective view of the frame of Embodiment 1 of the present invention (the second state);

[0032] Figure 5 is a perspective view of the frame of Embodiment 1 of the present invention (the third state);

[0033] Figure 6 is a perspective view of Embodiment 2 of the present invention;

[0034] Reference numerals: 1, frame; 2, upper mounting seat; 3, Roots pump; 4, lower mounting seat; 5, backing pump; 6, guide wheel; 7, foot cup; 8, guide rail; 9, first mounting plate; 10, second mounting plate; 11, guide wheel frame; 12, foot cup frame; 13, foot pad; 14, screw; 15, nut. Detailed Embodiments

[0035] The present invention will be further described below with reference to specific embodiments in conjunction with the drawings. See Figures 1-6 :

[0036] Embodiment 1

[0037] A frame 1 structure of a drawer-type vacuum pump unit includes:

[0038] A frame 1, the frame 1 being a double-layer frame structure;

[0039] An upper mounting seat 2, arranged on the upper layer of the frame 1 for carrying the Roots pump 3;

[0040] A lower mounting seat 4, arranged on the lower layer of the frame 1 for carrying the backing pump 5 (in this embodiment, the backing pump 5 is a sliding vane pump). The lower mounting seat 4 is detachably connected to the frame 1 through fasteners. After disassembly, the lower mounting seat 4 disengages downward from the frame 1. The bottom of the lower mounting seat 4 is provided with a guide wheel 6 and a foot cup 7;

[0041] A guide rail 8, laid on the ground and located directly below the guide wheel 6, for assisting the disengaged lower mounting seat 4 to move out of or into the frame 1;

[0042] During normal use, a gap is left between the guide wheel 6 and the guide rail 8, and the foot cup 7 contacts the ground to form a support structure for the lower mounting seat 4; after disassembly, the height of the foot cup 7 is adjusted to drive the lower mounting seat 4 to move downward, and the guide rail 8 contacts the guide wheel 6 to form a support structure for the lower mounting seat 4.

[0043] Compare with Figure 1 During normal use, the lower mounting seat 4 is rigidly connected to the frame 1 through fasteners, and the foot cup 7 and the ground support form an auxiliary support structure to meet the structural rigidity and stability required for the operation of the vacuum pump unit. The foot cup 7 can provide a certain shock absorption effect while increasing stability; at this time, the guide rail 8 is not laid on the ground, and a distance is left between the guide wheel 6 and the ground.

[0044] When maintenance is required, first lay the guide rail 8 on the ground opposite to the guide wheel 6, then remove the fastener, and separate the lower mounting seat 4 from the frame 1. At this time, the lower mounting seat 4 is supported only by the foot cup 7, and the position of the guide wheel 6 remains unchanged, and there is still a gap between it and the guide rail 8 (see attached Figure 2 ), adjust the height of the foot cup 7, the lower mounting seat 4 moves downward accordingly, and the gap between the guide wheel 6 and the guide rail 8 is reduced until the two contact to form a guide rail 8 guide system, and the guide rail 8 supports the lower mounting seat 4 (see FIG. Figure 4 The foot cup 7 can also be adjusted to be off the ground. When the lower mounting seat 4 is pulled outward, the guide wheel 6 rolls along the guide rail 8 until the lower mounting seat 4 is completely moved out of the frame 1 (see FIG. Figure 5 status shown in ).

[0045] After the maintenance is completed, the lower mounting seat 4 is pushed inward, and after being pushed into the frame 1, the height of the foot cup 7 is adjusted. The foot cup 7 first moves downward until it contacts the ground, and then the height of the foot cup 7 continues to be adjusted. The foot cup 7 pushes the lower mounting seat 4 upward, and the guide wheel 6 is disengaged from the guide rail 8. After being pushed up to the predetermined position, the lower mounting seat 4 and the frame 1 are rigidly connected by fasteners, the installation is completed, and the guide rail 8 is removed.

[0046] In this embodiment, the guide rails 8 are distributed along the longitudinal direction of the frame 1 and extend outside the frame 1, and the lower mounting seat 4 is moved out of the frame 1 through the transverse gap of the frame 1. The longitudinal direction of the frame 1 refers to a direction perpendicular to the axes of the Roots pump 3 and the fore pump 5, and the transverse direction of the frame 1 refers to a direction parallel to the axes of the Roots pump 3 and the fore pump 5. This layout is suitable for an installation environment where the transverse space on both sides of the frame 1 is limited.

[0047] In order to provide a more stable guide rail 8 guiding system, a pair of guide rails 8 are arranged in parallel, and two or more guide wheels 6 are correspondingly arranged for each guide rail 8. A plurality of foot cups 7 are arranged and located inside the guide rails 8 and the guide wheels 6; further, at least four foot cups 7 are provided to form a four-point support structure.

[0048] Compare with the attached Figure 3 In this embodiment, the specific installation structure of the lower mounting seat 4 and the frame 1 is as follows: a first mounting plate 9 is arranged inside the lower layer of the frame 1, and a second mounting plate 10 is arranged outside the lower mounting seat 4. The first mounting plate 9 and the second mounting plate 10 are fixedly connected by fasteners. During normal operation, the fasteners rigidly connect the lower mounting seat 4 and the frame 1. After removing the fasteners, the lower mounting seat 4 is separated from the frame 1.

[0049] Further, the first mounting plate 9 penetrates through the frame 1, and the second mounting plate 10 penetrates through the lower mounting seat 4. The bottom of the first mounting plate 9 is attached to the top of the second mounting plate 10 and fixed by fasteners; preferably, both the first mounting plate 9 and the second mounting plate 10 are arranged along the moving-out direction of the lower mounting seat 4.

[0050] Further, both the first mounting plate 9 and the second mounting plate 10 are L-shaped plates. Their vertical sides are respectively fixedly connected to the frame 1 or the lower mounting seat 4 by welding, and their horizontal sides are detachably fastened by bolts. A number of bolt mounting holes are correspondingly arranged on the horizontal sides of the first mounting plate 9 and the second mounting plate 10.

[0051] The guide rail 8 guiding system of this embodiment is: the cross-section of the guide rail 8 is V-shaped, a V-shaped groove matching with the top of the guide rail 8 is arranged on the circumference of the guide wheel 6, a guide wheel 6 bracket is fixed at the bottom of the lower mounting seat 4, and the guide wheel 6 is rotatably arranged on the guide wheel 6 bracket. Compared with other guide rail 8 guiding systems (such as the guide groove roller system), the guide rail 8 guiding system of this embodiment can automatically pair and calibrate through the V-shaped top of the guide rail 8 and the V-shaped groove of the guide wheel 6. Even if the placement position of the guide rail 8 is deviated, during the downward movement of the guide wheel 6, the guide wheel 6 can automatically snap into the V-shaped top matching with it and finely adjust the position of the guide rail 8.

[0052] The structure of the foot cup 7 of this embodiment is as follows: a foot cup frame 12 is provided at the bottom of the lower mounting seat 4, and the foot cup 7 includes a foot pad 13, a screw rod 14 and a nut 15. The screw rod 14 is screwed to the threaded hole on the foot cup frame 12 and the support height of the foot cup 7 is adjusted by rotating the screw rod 14. The nut 15 is screwed to the screw rod 14 and is in contact with the bottom of the foot cup frame 12 to form a locking structure. When the height of the foot cup 7 needs to be adjusted, the nut 15 is loosened, the foot pad 13 is in contact with the ground and is in a static state, and the screw rod 14 is rotated by the hexagonal head on the screw rod 14. The screw rod 14 rotates relative to the foot pad 13 and the foot cup frame 12, and the axial distance between the screw rod 14 and the foot cup frame 12 changes, thereby changing the height of the foot cup 7. When the lower mounting seat 4 is supported by the guide rail 8, the height of the foot cup 7 can also be continuously adjusted to make its foot pad 13 off the ground.

[0053] Example 2

[0054] Compare with Figure 6 The structure of the frame 1 of the drawer-type vacuum pump unit of this embodiment is substantially the same as that of the embodiment 1, except that the guide rails 8 are distributed along the lateral direction of the frame 1 and extend to the outside of the frame 1, and the lower mounting seat 4 is moved out of the frame 1 through the longitudinal gap of the frame 1. This layout is suitable for installation environments where the longitudinal space on both sides of the frame 1 is limited.

[0055] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A frame structure of a drawer-type vacuum pump unit, characterized in that, Comprising: Frame (1); Upper mounting base (2), arranged on the upper layer of the frame (1) for carrying the Roots pump (3); Lower mounting base (4), arranged on the lower layer of the frame (1) for carrying the fore pump (5), the lower mounting base (4) is detachably connected to the frame (1) through fasteners, and after disassembly, the lower mounting base (4) moves downward away from the frame (1), and guide wheels (6) and foot cups (7) are arranged at the bottom of the lower mounting base (4); Guide rail (8), laid on the ground and directly below the guide wheels (6) for assisting the detached lower mounting base (4) to move out of or into the frame (1); During normal use, there is a gap between the guide wheels (6) and the guide rail (8), and the foot cups (7) are in contact with the ground to form a support structure for the lower mounting base (4); after disassembly, the height of the foot cups (7) is adjusted to drive the lower mounting base (4) to move downward, and after the guide rail (8) contacts the guide wheels (6), a support structure for the lower mounting base (4) is formed.

2. The frame structure of a drawer-type vacuum pump unit according to claim 1, characterized in that The guide rail (8) is distributed longitudinally along the frame (1) and extends outside the frame (1), and the lower mounting base (4) moves out of the frame (1) through the lateral gap of the frame (1).

3. The frame structure of a drawer-type vacuum pump unit according to claim 1, characterized in that, The guide rail (8) is distributed transversely along the frame (1) and extends outside the frame (1), and the lower mounting base (4) moves out of the frame (1) through the longitudinal gap of the frame (1).

4. The frame structure of a drawer-type vacuum pump unit according to claim 1, characterized in that, A pair of guide rails (8) are arranged in parallel, and two or more guide wheels (6) are correspondingly arranged for each guide rail (8), and a plurality of foot cups (7) are arranged and located inside the guide rails (8) and the guide wheels (6).

5. The frame structure of a drawer-type vacuum pump unit according to claim 1, characterized in that, A first mounting plate (9) is arranged inside the lower layer of the frame (1), and a second mounting plate (10) is arranged outside the lower mounting base (4), and the first mounting plate (9) and the second mounting plate (10) are fixedly connected through fasteners.

6. The frame structure of a drawer-type vacuum pump unit according to claim 5, characterized in that, The first mounting plate (9) penetrates through the frame (1), the second mounting plate (10) penetrates through the lower mounting base (4), and the bottom of the first mounting plate (9) is attached to the top of the second mounting plate (10) and fixedly connected through fasteners.

7. The frame structure of a drawer-type vacuum pump unit according to claim 6, characterized in that, Both the first mounting plate (9) and the second mounting plate (10) are L-shaped plates, and their vertical sides are fixedly connected to the frame (1) or the lower mounting base (4) by welding respectively, and their horizontal sides are detachably fastened by bolts.

8. The frame structure of a drawer-type vacuum pump unit according to claim 1, characterized in that, The cross-section of the guide rail (8) is V-shaped, a V-shaped groove matching with the top of the guide rail (8) is arranged circumferentially on the guide wheel (6), a guide wheel bracket (11) is fixed at the bottom of the lower mounting base (4), and the guide wheel (6) is rotatably arranged on the guide wheel bracket (11).

9. The frame structure of a drawer-type vacuum pump unit according to claim 1, characterized in that, A foot cup bracket (12) is arranged at the bottom of the lower mounting base (4), the foot cup (7) includes a foot pad (13), a screw rod (14) and a nut (15), the screw rod (14) is screwed into the threaded hole on the foot cup bracket (12) and the support height of the foot cup (7) is adjusted by rotating the screw rod (14), and the nut (15) is screwed on the screw rod (14) and abuts against the bottom of the foot cup bracket (12) to form a locking structure.

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