A double-sealed vacuum pump cover structure

Abstract

The application relates to the field of pump covers, and discloses a double-sealed vacuum pump cover structure. The application aims to solve the problem that gaps are easily formed between devices after the devices are disassembled and fixed for multiple times, and the sealing performance of the devices is affected; when the pump body is disassembled for maintenance, a plurality of bolts need to be unscrewed, and the disassembly is troublesome; when the device is installed, the fit degree of the sealing ring and the pump cover needs to be ensured, and the screwing depth of each bolt needs to be ensured as much as possible. The application is composed of a sealing mechanism and a fixing mechanism. The device inserts an inner pipe into the inner side of a shell, then causes the first sealing ring on the side of the inner pipe to abut against the side of an arc-shaped groove, seals the place where the inner pipe contacts the arc-shaped groove, then splices two arc-shaped clamping plates together, then rotates a dovetail nut to cause the two arc-shaped clamping plates to gradually tighten, causes the arc-shaped rubber ring to deform and be pressed into the arc-shaped groove, seals the joint of the two arc-shaped grooves, and has the effect of twice sealing of the device.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pump cover, in particular to a double-sealed vacuum pump cover structure. BACKGROUND

[0002] The conventional Roots vacuum pump cover seal adopts a piston ring supporting sealing structure, after multiple disassembly and fixation, gaps are prone to exist between the device, in addition, after long time operation of the pump, the piston ring is further worn to increase the gap, affecting the sealing performance of the device, and the device is fixed on the pump body through bolts, etc., when the pump body is disassembled and repaired, multiple bolts need to be unscrewed, which is troublesome, when the existing device is installed, the fit of the sealing ring and the pump cover needs to be ensured, and the screwing depth of each bolt needs to be as consistent as possible to ensure the sealing performance of the device, which is more troublesome. SUMMARY

[0003] In view of the deficiencies of the prior art, the present application provides a double-sealed vacuum pump cover structure, which solves the problems that after multiple disassembly and fixation, gaps are prone to exist between the device, in addition, after long time operation of the pump, the piston ring is further worn to increase the gap, affecting the sealing performance of the device, the device is fixed on the pump body through bolts, etc., when the pump body is disassembled and repaired, multiple bolts need to be unscrewed, which is troublesome, when the existing device is installed, the fit of the sealing ring and the pump cover needs to be ensured, and the screwing depth of each bolt needs to be as consistent as possible to ensure the sealing performance of the device, which is more troublesome.

[0004] To achieve the above purpose, the present application is implemented by the following technical scheme: a double-sealed vacuum pump cover structure, comprising a motor, the side surface of the motor rotating shaft is movably sleeved with a shell, the left end of the shell is fixedly connected with the right side of the motor, the top surface of the shell is fixedly inserted with a connecting pipe, the inside of the shell is fixedly inserted with a circular pipe, the side surface of the circular pipe is provided with an annular inclined surface, one end of the motor rotating shaft is fixedly sleeved with an impeller, the side surface of the shell is fixedly sleeved with an annular protrusion, the right end of the shell is movably sleeved with a sealing mechanism, and the side surface of the shell is fixedly connected with a fixing mechanism.

[0005] Preferably, the sealing mechanism comprises an inner pipe, the side surface of the inner pipe is slidably connected with the inner wall of the shell, the left end of the inner pipe is bonded with a first sealing ring, the side surface of the first sealing ring is in abutment with the annular inclined surface, the right end of the inner pipe is fixedly connected with a cover body, the left side of the cover body is fixedly connected with an outer pipe, the inner side of the outer pipe is movably sleeved on the side surface of the shell, the side surface of the outer pipe is fixedly sleeved with a hollow disc, the left side of the hollow disc is in abutment with the right side of the annular protrusion, and the side opposite to the annular protrusion of the hollow disc is provided with an arc-shaped groove.

[0006] Preferably, the fixing mechanism comprises a vertical rod, the top end of the vertical rod is fixed on the side of the shell, the bottom of the right side of the vertical rod is rotationally connected with a rotating rod, the side of the rotating rod is hingedly connected with two arc-shaped clamping plates, the side of the two arc-shaped clamping plates is fixedly connected with a C-shaped plate, the inner side of the C-shaped plate on the front side is hingedly connected with a screw rod, the rear end of the screw rod extends to the inner side of the C-shaped plate on the rear side and is threadedly connected with a dovetail nut, the inner side of the arc-shaped clamping plate is bonded with an arc-shaped rubber ring, the side of the arc-shaped rubber ring is in contact with the inner wall of the arc-shaped groove, the right side of the arc-shaped clamping plate is fixedly connected with an inclined plate, and the side of the inclined plate is in contact with the side of the hollow disc.

[0007] Preferably, the diameter of the outer ring of the hollow disc is equal to the diameter of the outer ring of the annular protrusion, and the central axis of the hollow disc is coaxial with the central axis of the annular protrusion.

[0008] Preferably, the number of the arc-shaped rubber rings is two, and the two ends of the two arc-shaped rubber rings correspond to each other and are in contact with each other.

[0009] Preferably, the vertical rod and the rotating rod are perpendicular to each other.

[0010] Preferably, the shape of the section of the arc-shaped clamping plate is L-shaped, and the inner side of the arc-shaped clamping plate is in contact with the outer side of the annular protrusion.

[0011] Preferably, the number of the inclined plates is four, the four inclined plates are evenly distributed in a ring shape, and the side of the inclined plate away from the arc-shaped clamping plate is arc-shaped.

[0012] Beneficial effects

[0013] The application provides a double-sealed vacuum pump cover structure.

[0014] (1) The double-sealed vacuum pump cover structure inserts the inner tube on the inner side of the shell, then wraps the outer tube on the outer side of the shell, then makes the first sealing ring on the side of the inner tube in contact with the side of the arc-shaped groove, seals the contact part of the inner tube and the arc-shaped groove, then splices the two arc-shaped clamping plates together, then rotates the dovetail nut to gradually tighten the two arc-shaped clamping plates, makes the arc-shaped rubber ring deform and extrude into the arc-shaped groove, seals the connection part of the two arc-shaped grooves, and achieves the effect of secondary sealing of the device.

[0015] (2) The double-sealed vacuum pump cover structure rotates the dovetail nut to gradually loosen the two arc-shaped clamping plates, then opens the arc-shaped clamping plates, moves the arc-shaped rubber ring out of the arc-shaped groove, separates the inclined plate from the hollow disc, and pulls out the cover body to complete the disassembly of the device.

[0016] (3), the double-sealed vacuum pump cover structure is through the inner tube is inserted in the inside of the shell, then two arc-shaped clamping plates are spliced together, then the dovetail nut is rotated to make the two arc-shaped clamping plates gradually tighten, then the spacing between the annular protrusion and the hollow disc gradually becomes smaller, and the arc-shaped rubber ring is extruded, the installation of the cover body is completed, the operation is simple and convenient, and the sealing performance is good. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the application;

[0018] Figure 2 It is a partial three-dimensional development structure sectional view of the application;

[0019] Figure 3 It is a partial three-dimensional structure sectional view of the application; Figure 2 It is an enlarged view of the structure at A in the application;

[0020] Figure 4 It is a partial three-dimensional structure sectional view of the application;

[0021] Figure 5 It is a partial three-dimensional development structure sectional view of the application; Figure 4 It is an enlarged view of the structure at B in the application.

[0022] In the drawing: 1, motor; 2, shell; 3, connecting pipe; 4, round pipe; 5, impeller; 6, sealing mechanism; 61, inner tube; 62, first sealing ring; 63, cover body; 64, outer tube; 65, hollow disc; 66, arc-shaped groove; 7, fixing mechanism; 71, vertical rod; 72, rotating rod; 73, arc-shaped clamping plate; 74, arc-shaped rubber ring; 75, inclined plate; 76, C-shaped plate; 77, screw rod; 78, dovetail nut; 8, annular inclined surface; 9, annular protrusion. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0024] Please refer to Figures 1-5 A double-sealed vacuum pump cover structure, comprising a motor 1, a shell 2 movably sleeved on the side of the rotating shaft of the motor 1, the left end of the shell 2 is fixedly connected with the right side of the motor 1, a connecting pipe 3 is fixedly inserted on the top surface of the shell 2, a round pipe 4 is fixedly inserted in the inside of the shell 2, an annular inclined surface 8 is formed on the side of the round pipe 4, an impeller 5 is fixedly sleeved on one end of the rotating shaft of the motor 1, an annular protrusion 9 is fixedly sleeved on the side of the shell 2, a sealing mechanism 6 is movably sleeved on the right end of the shell 2, and a fixing mechanism 7 is fixedly connected with the side of the shell 2.

[0025] In the application, the sealing mechanism 6 comprises an inner tube 61, the side surface of the inner tube 61 is in sliding connection with the inner wall of the shell 2, the left end of the inner tube 61 is bonded with a first sealing ring 62, the side surface of the first sealing ring 62 is in abutment with the annular inclined surface 8, the right end of the inner tube 61 is fixedly connected with a cover body 63, the left side of the cover body 63 is fixedly connected with an outer tube 64, the inner side of the outer tube 64 is movably sleeved on the side surface of the shell 2, the side surface of the outer tube 64 is fixedly sleeved with a hollow disc 65, the left side of the hollow disc 65 is in abutment with the right side of the annular protrusion 9, the side opposite to the annular protrusion 9 of the hollow disc 65 is provided with an arc-shaped groove 66, the inner tube 61 is inserted into the inner side of the shell 2, then the outer tube 64 is wrapped on the outer side of the shell 2, and then the first sealing ring 62 on the side surface of the inner tube 61 is in abutment with the side surface of the arc-shaped groove 66, so that the place where the inner tube 61 contacts with the arc-shaped groove 66 is sealed.

[0026] In the application, the fixing mechanism 7 comprises a vertical rod 71, the top end of the vertical rod 71 is fixed on the side surface of the shell 2, the bottom of the right side of the vertical rod 71 is rotatably connected with a rotating rod 72, the side surface of the rotating rod 72 is hingedly connected with two arc-shaped clamping plates 73, the side surface of the two arc-shaped clamping plates 73 is fixedly connected with a C-shaped plate 76, the inner side of the front C-shaped plate 76 is hingedly connected with a screw rod 77, the rear end of the screw rod 77 extends to the inner side of the rear C-shaped plate 76 and is threadedly connected with a dovetail nut 78, the inner side of the arc-shaped clamping plate 73 is bonded with an arc-shaped rubber ring 74, the side surface of the arc-shaped rubber ring 74 is in abutment with the inner wall of the arc-shaped groove 66, the right side of the arc-shaped clamping plate 73 is fixedly connected with an inclined plate 75, the side surface of the inclined plate 75 is in abutment with the side surface of the hollow disc 65, after the first sealing ring 62 is in abutment with the side surface of the arc-shaped groove 66, the two arc-shaped clamping plates 73 are spliced together, then the dovetail nut 78 is rotated to gradually tighten the two arc-shaped clamping plates 73, the arc-shaped rubber ring 74 is deformed and pressed into the arc-shaped groove 66, the device is sealed again, then the inclined plate 75 on the side surface of the closed arc-shaped clamping plate 73 limits the hollow disc 65, the installation and sealing of the device are completed. The side surface of the arc-shaped rubber ring 74 and the outer side of the outer tube 64 are both provided with a heat preservation layer, the arc-shaped rubber ring 74 is deformed under pressure to ensure the sealing of the connection between the annular protrusion 9 and the hollow disc 65, prevent gas from being discharged or entering from the connection between the annular protrusion 9 and the hollow disc 65 of the shell 2, ensure the constancy of the internal temperature of the device during operation, then the heat preservation layer on the side surface of the arc-shaped rubber ring 74 and the heat preservation layer on the outer side of the outer tube 64 are matched to heat preserve the device, ensure the constancy of the internal temperature of the shell 2 during vacuumizing of the device.

[0027] In the application, the diameter of the outer circle of the hollow disc 65 is equal to the outer circle diameter of the annular protrusion 9, and the central axis of the hollow disc 65 is coaxial with the central axis of the annular protrusion 9, which facilitates the arc-shaped clamping plate 73 to press the arc-shaped rubber ring 74 into the arc-shaped groove 66 on the side surface of the hollow disc 65 and the annular protrusion 9, and ensures the sealing of the device.

[0028] In the application, the number of the arc-shaped rubber rings 74 is two, and the two ends of the two arc-shaped rubber rings 74 correspond to each other and interfere with each other, so as to ensure that the two arc-shaped rubber rings 74 can be completely attached to the inner wall of the arc-shaped groove 66.

[0029] In the application, the vertical rod 71 is perpendicular to the rotating rod 72.

[0030] In the application, the cross section of the arc-shaped clamping plate 73 is L-shaped, and the inner side of the arc-shaped clamping plate 73 interferes with the outer side of the annular protrusion 9, so as to ensure the attachment between the arc-shaped clamping plate 73 and the annular protrusion 9.

[0031] In the application, the number of the inclined plates 75 is four, and the four inclined plates 75 are distributed in a ring shape at equal distances, and the side of the inclined plate 75 away from the arc-shaped clamping plate 73 is arc-shaped, so as to seal the contact position of the two arc-shaped grooves 66 through cooperation of the inclined plate 75 and the arc-shaped rubber ring 74, and fix the hollow disc 65 through the inclined plate 75.

[0032] In use, the inner tube 61 is inserted into the inner side of the shell 2, so as to make the outer tube 64 wrap the outer side of the shell 2, then make the first sealing ring 62 on the side of the inner tube 61 interfere with the side of the arc-shaped groove 66, seal the contact position of the inner tube 61 and the arc-shaped groove 66, then splice the two arc-shaped clamping plates 73 together, then rotate the dovetail nut 78 to make the two arc-shaped clamping plates 73 gradually tighten, make the arc-shaped rubber ring 74 deform and extrude into the arc-shaped groove 66, seal the connection position of the two arc-shaped grooves 66, then limit the hollow disc 65 through the inclined plate 75 on the side of the closed arc-shaped clamping plate 73, and complete the installation and sealing of the device.

[0033] It should be noted that, in the present document, the terms such as first and second, etc. are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0034] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A double-sealed vacuum pump cover structure, comprising a motor (1), characterized in that: The side of the motor (1) rotating shaft is movably sleeved with a housing (2), the left end of the housing (2) is fixedly connected to the right side of the motor (1), the top surface of the housing (2) is fixedly plugged with a connecting pipe (3), the interior of the housing (2) is fixedly plugged with a round tube (4), the side of the round tube (4) is provided with an annular inclined surface (8), one end of the motor (1) rotating shaft is fixedly sleeved with an impeller (5), the side of the housing (2) is fixedly sleeved with an annular protrusion (9), the right end of the housing (2) is movably sleeved with a sealing mechanism (6), and the side of the housing (2) is fixedly connected with a fixing mechanism (7); The sealing mechanism (6) includes an inner tube (61), the side surface of the inner tube (61) is slidably connected to the inner wall of the shell (2), a first sealing ring (62) is bonded to the left end of the inner tube (61), the side surface of the first sealing ring (62) contacts the annular inclined surface (8), the right end of the inner tube (61) is fixedly connected to a cover body (63), the left side of the cover body (63) is fixedly connected to an outer tube (64), the inner side of the outer tube (64) is movably sleeved on the side surface of the shell (2), a hollow disc (65) is fixedly sleeved on the side surface of the outer tube (64), the left side of the hollow disc (65) contacts the right side of the annular protrusion (9), and an arc groove (66) is provided on the side of the hollow disc (65) opposite to the annular protrusion (9); The fixing mechanism (7) includes a vertical rod (71), the top end of the vertical rod (71) is fixed on the side of the shell (2), the bottom of the right side of the vertical rod (71) is rotatably connected to a rotating rod (72), the side of the rotating rod (72) is hinged to two arc-shaped clamping plates (73), the sides of the two arc-shaped clamping plates (73) are fixedly connected to C-shaped plates (76), the inner side of the front C-shaped plate (76) is hinged to a screw rod (77), the rear end of the screw rod (77) extends to the inner side of the rear C-shaped plate (76) and is threadedly connected to a dovetail nut (78), the inner side of the arc-shaped clamping plate (73) is bonded with an arc-shaped rubber ring (74), the side of the arc-shaped rubber ring (74) is in conflict with the inner wall of the arc-shaped groove (66), the right side of the arc-shaped clamping plate (73) is fixedly connected to an inclined plate (75), the side of the inclined plate (75) is in conflict with the side of the hollow disc (65); The diameter of the outer ring of the hollow disc (65) is equal to the diameter of the outer ring of the annular protrusion (9), and the central axis of the hollow disc (65) is coaxial with the central axis of the annular protrusion (9); The cross-section of the arc-shaped clamping plate (73) is L-shaped, and the inner side of the arc-shaped clamping plate (73) abuts against the outer side of the annular protrusion (9).

2. A double-sealed vacuum pump cover structure according to claim 1, characterized in that: There are two arc-shaped rubber rings (74), and the two ends of the two arc-shaped rubber rings (74) correspond to each other and conflict with each other.

3. The double-sealed vacuum pump cover structure according to claim 1, characterized in that: The vertical rod (71) and the rotating rod (72) are perpendicular to each other.

4. The double-sealed vacuum pump cover structure according to claim 1, characterized in that: The number of the inclined plates (75) is four, and the four inclined plates (75) are distributed in a ring shape at equal distances, and the side of the inclined plate (75) away from the arc-shaped clamping plate (73) is arc-shaped.

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