Roots vacuum pump for vacuum glass production and vacuum glass furnace

Abstract

The invention relates to the technical field of Roots vacuum pumps, and discloses a Roots vacuum pump for vacuum glass production and a vacuum glass furnace, the Roots vacuum pump for vacuum glass production comprises a Roots vacuum pump body, an air inlet arranged at the top of the Roots vacuum pump body, and a connecting pipe arranged at the top of the air inlet, the vacuum glass furnace shell is arranged on one side of the connecting pipe, the front cover is arranged at the front end of the roots vacuum pump body, and the air outlet is formed in the bottom of the roots vacuum pump body. A second sleeve is rotated by clamping a rotating assembly, so that a first sleeve is driven to rotate, a T-shaped rod is separated from the inner side of a strip-shaped groove through opening of a tensioning assembly and cooperation with an ejection assembly, the second sleeve rotates and does not drive the first sleeve to rotate any more, and when the temperatures of a rotor and a pump body are high, the rotor does not rotate any more, and when the temperatures of the rotor and the pump body are normal, the temperature of the rotor and the pump body are normal. And the rotor can continuously rotate, so that the rotor can be protected.

Description

Technical Field

[0001] The invention relates to the technical field of Roots vacuum pumps, in particular to a Roots vacuum pump and a vacuum glass furnace for vacuum glass production. Background Art

[0002] In the production process of vacuum glass, the gap between the two pieces of glass needs to be evacuated to eliminate the air and moisture in it and improve the heat insulation, thermal insulation and sound insulation performance of the glass. Roots vacuum pumps have become an ideal choice for this link due to their efficient exhaust capacity and stable working performance.

[0003] A Roots vacuum pump is a type of variable displacement vacuum pump that has two blade-shaped rotors rotating synchronously in opposite directions. There is a small gap between the rotors and between the rotors and the inner wall of the pump casing, and they do not touch each other. When the Roots vacuum pump starts working, the two rotors rotate synchronously and in opposite directions in a certain direction. As the rotors rotate, the space between them gradually increases, forming a low-pressure area, thereby sucking gas from the air inlet into the pump. As the rotors continue to rotate, the space between them gradually decreases, compressing the sucked gas. When the gap between the convex part of the rotor and the internal gas container is close to the minimum, the gas is sealed in the container. As the rotors rotate further, the gap between the impellers gradually increases, causing the gas in the container to be pushed to the exhaust port and discharged from the pump.

[0004] The above prior art has the following defects:

[0005] When the Roots vacuum pump is working, the two blade-shaped rotors in the middle of the pump are constantly rubbing against the air and squeezing the air, which causes the heat of the rotor to increase continuously, and the temperature of the pump body to increase continuously. In the prior art, heat is usually dissipated through the heat sink provided on the outside of the shell, and the heat dissipation efficiency is low. The heat on the rotor is constantly increasing. Under the action of the principle of thermal expansion and contraction, the rotor is heated to cause thermal expansion. The pump body will also expand when heated, which will gradually reduce the gap between the rotor and the inner wall of the pump body, causing friction between the rotor and the pump body, which is easy to cause wear between the rotor and the pump body. Moreover, as the heat of the rotor and the pump body continues to increase, the rotor and the pump body will continue to expand due to heat, causing the friction between the rotor and the pump body to gradually increase. In severe cases, it may even cause the rotor to get stuck and damage the pump body. The thermal expansion caused by the overheating of the rotor may also affect the performance of the Roots vacuum pump, such as a decrease in the pumping speed and exhaust efficiency, which may require shutdown for maintenance, affecting the production progress, and will also increase additional energy consumption and costs. In addition, thermal expansion may also cause deformation of the pump body, further affecting the performance and stability of the pump. Summary of the invention

[0006] In view of the problem that the rotor in the prior art easily generates heat, which causes the temperature between the rotor and the pump body to rise, the rotor and the pump body to expand due to heat, the gap between the rotor and the pump body to gradually decrease, and friction and wear between the rotor and the pump body to easily occur, a Roots vacuum pump for vacuum glass production is proposed.

[0007] The present application provides a Roots vacuum pump for vacuum glass production, the purpose of which is to solve the problem that the rotor and the pump body expand due to heat, so that the gap between the rotor and the pump body gradually decreases, which easily causes friction and wear, and to protect the rotor and dissipate heat and cool the pump body.

[0008] The technical scheme of the present invention is: a Roots vacuum pump for vacuum glass production, comprising a Roots vacuum pump body, an air inlet arranged at the top of the Roots vacuum pump body, a connecting pipe arranged at the top of the air inlet, a vacuum glass furnace shell arranged at one side of the connecting pipe, a front cover arranged at the front end of the Roots vacuum pump body, and an air outlet arranged at the bottom of the Roots vacuum pump body, and also comprising a protection unit arranged on the Roots vacuum pump body;

[0009] The protection unit includes a rotation protection component arranged on the Roots vacuum pump body, and a cooling component arranged on the Roots vacuum pump body, wherein the rotation protection component includes a clamping rotation assembly arranged on the Roots vacuum pump body, a connecting assembly arranged on one side of the clamping rotation assembly, and a tensioning assembly arranged in the clamping rotation assembly;

[0010] The clamping rotating assembly includes a fixed shaft rotatably connected to the Roots vacuum pump body, a first sleeve fixedly connected to the fixed shaft, a second sleeve rotatably connected to the inner side of the first sleeve, a plurality of symmetrically distributed T-shaped rods slidably connected to the first sleeve, a compression spring fixedly connected between the T-shaped rod and the first sleeve, the compression spring is sleeved on the rod wall of the T-shaped rod, a plurality of symmetrically distributed strip grooves are provided on the second sleeve, and one end of the T-shaped rod away from the compression spring is plugged into the inner side of the strip groove.

[0011] Furthermore, the connection assembly includes a plurality of symmetrically distributed connection bars fixedly connected to the Roots vacuum pump body, a connection disk fixedly connected to the plurality of connection bars, and a connection shaft movably connected to the connection disk.

[0012] Furthermore, the tensioning assembly includes a plurality of symmetrically distributed tensioning grooves opened on the inner wall of the second sleeve, a plurality of symmetrically distributed fixing strips fixedly connected to the shaft wall of one end of the connecting shaft close to the second sleeve, a tensioning frame rotatably connected to the fixing strip on a side away from the connecting shaft, a tensioning strip rotatably connected to the tensioning frame on a side away from the fixing strip, a tensioning block fixedly connected to the tensioning strip, and the tensioning block is slidably connected to the inner side of the tensioning groove at one end away from the tensioning strip.

[0013] Furthermore, the rotation protection component also includes an ejection assembly arranged on the tensioning assembly, a support assembly arranged on the connecting assembly, and a drive assembly arranged on one side of the connecting assembly;

[0014] The ejection assembly includes a plurality of ejection holes symmetrically distributed and connected to the inner side of the strip groove, an ejection rod fixedly connected to the tension strip, an ejection ring slidably sleeved on the wall of the ejection rod, two ejection grooves symmetrically distributed and provided on the ejection rod, an ejection block slidably connected to the inner sides of the two ejection grooves, both ejection blocks are fixedly connected to the ejection ring, an ejection spring fixedly connected between the ejection ring and the tension strip, and the ejection spring is sleeved on the outer side of the ejection rod.

[0015] Furthermore, the support assembly includes an active cavity opened on the connecting shaft, a support rod slidably connected to one end of the connecting shaft close to the second sleeve, a support spring fixedly connected to one end of the support rod, the support spring is fixedly connected to the inner wall of the active cavity at one end away from the support rod, and the other end of the support rod is fixedly connected to the inner wall of the second sleeve.

[0016] Furthermore, the driving assembly includes a driving motor fixedly connected to the front cover, a driving circular plate fixedly connected to the output shaft of the driving motor, two symmetrically distributed V-shaped blocks fixedly connected to the driving circular plate, a driving circular block fixedly connected to the connecting shaft, and two symmetrically distributed V-shaped grooves opened on the driving circular block, and the two V-shaped blocks are respectively slidably connected to the inner sides of the two V-shaped grooves.

[0017] Further, the cooling component includes a coolant delivery component arranged on the Roots vacuum pump body, and a reciprocating push component arranged on one side of the coolant delivery component;

[0018] The coolant delivery assembly includes a heat exchange tube fixedly connected to the body of the Roots vacuum pump, a liquid outlet tube fixedly connected to one side of the heat exchange tube and communicating with the interior of the heat exchange tube, a liquid inlet tube fixedly connected to the other side of the heat exchange tube and communicating with the interior of the heat exchange tube, a fixed block fixedly connected to the body of the Roots vacuum pump, a delivery tube fixedly connected to the fixed block, a delivery tube fixedly connected to one end of the delivery tube and communicating with the interior of the delivery tube, a one-way liquid outlet valve fixedly connected to the delivery tube, a feed pipe fixedly connected to one side of the delivery tube, a one-way liquid inlet valve fixedly connected to the feed pipe, and an outer tube fixedly connected to the end of the feed pipe away from the delivery tube.

[0019] Furthermore, the reciprocating pushing assembly includes a gear fixedly mounted on the wall of the connecting shaft, a reciprocating rod slidably connected to one end of the conveying cylinder away from the conveying tube, a rack fixedly connected to one end of the reciprocating rod, the rack meshing with the gear, a piston fixedly connected to the other end of the reciprocating rod, the piston is sealingly and slidably connected to the inner side of the conveying cylinder, and a return spring fixedly connected between the piston and the inner wall of the conveying cylinder, and the return spring is mounted on the wall of the reciprocating rod.

[0020] Another object of the present invention is to provide a vacuum glass furnace, the purpose of which is to improve the glass tempering quality and optimize the glass performance during the vacuum glass processing, so that the vacuum glass has better thermal insulation effect and improve the sound insulation and noise reduction performance of the vacuum glass.

[0021] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a vacuum glass furnace, comprising a vacuum glass furnace shell fixedly connected to one end of a connecting pipe, an end cover hinged to the front end of the vacuum glass furnace shell, and a supporting leg fixedly connected to the bottom of the vacuum glass furnace shell.

[0022] Furthermore, the vacuum glass furnace shell is cylindrical.

[0023] Beneficial effects of the present invention:

[0024] 1. By clamping the rotating assembly, the second sleeve rotates, which in turn drives the first sleeve to rotate. The tensioning assembly is opened and the ejection assembly is cooperated to separate the T-bar from the inner side of the strip groove, so that the second sleeve rotates and no longer drives the first sleeve to rotate. When the temperature of the rotor and the pump body is high, the rotor no longer rotates. When the temperature of the rotor and the pump body is normal, the rotor can continue to rotate, which protects the rotor.

[0025] 2. The driving motor drives the driving circular plate to rotate, and under the action of the V-block and the V-groove, the connecting shaft is driven to move into the second sleeve. When the connecting shaft needs to provide a larger torsional force to rotate, the driving circular block will continue to move to one side of the connecting shaft, so that the connecting shaft moves into the second sleeve. Through the tensioning assembly and the ejection assembly, in conjunction with the compression spring, the T-bar slides out of or in the strip groove. Under the action of the ejection spring and the support spring, the connecting shaft repeatedly moves back and forth, thereby preventing the rotor and the pump body from rotating at high temperature and causing wear to the rotor and the pump body.

[0026] 3. Through the reciprocating movement of the connecting shaft, the piston moves back and forth in the conveying cylinder under the action of the return spring. Under the action of the one-way liquid inlet valve, the coolant enters the conveying cylinder from the feed pipe. Under the action of the one-way liquid outlet valve, the coolant enters the conveying pipe. The cycle is repeated and the coolant continuously enters the heat exchange tube to take away the heat generated by the pump body, thereby cooling the rotor and the pump body, avoiding deformation of the rotor and the pump body and affecting the suction efficiency of the Roots vacuum pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the structure of the Roots vacuum pump body of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the Roots vacuum pump of the present invention without the front cover;

[0030] Figure 4 It is a schematic diagram of the protection unit structure of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the clamping rotating assembly of the present invention;

[0032] Figure 6 It is a schematic diagram of the structure of the connection assembly of the present invention;

[0033] Figure 7 It is a schematic diagram of the structure of the tensioning assembly of the present invention;

[0034] Figure 8 It is a schematic diagram of the partial structure of the tensioning assembly of the present invention;

[0035] Fig. 9 An exploded view of the ejection assembly of the present invention;

[0036] Fig.10 It is a schematic diagram of the support assembly structure of the present invention;

[0037] Fig.11 It is a schematic diagram of the structure of the driving assembly of the present invention;

[0038] Fig.12 It is a schematic diagram of the cooling component structure of the present invention;

[0039] Fig.13 It is a schematic diagram of the local structure of the reciprocating driving component of the present invention.

[0040] In the figure:

[0041] 1. Roots vacuum pump body; 11. Air inlet; 12. Connecting pipe; 13. Vacuum glass furnace shell; 14. End cover; 15. Support leg; 16. Front cover; 17. Air outlet; 2. Clamping rotating assembly; 21. Fixed shaft; 22. First sleeve; 23. T-bar; 24. Compression spring; 25. Second sleeve; 26. Strip groove; 3. Connecting assembly; 31. Connecting strip; 32. Connecting plate; 33. Connecting shaft; 4. Tensioning assembly; 41. Tensioning groove; 42. Fixed strip; 43. Tensioning strip; 44. Tensioning frame; 45. Tensioning block; 5. Ejector assembly; 51. Ejector groove; 52. Ejector Block; 53, ejection spring; 54, ejection ring; 55, ejection hole; 56, ejection rod; 6, support assembly; 61, movable cavity; 62, support spring; 63, support rod; 7, drive assembly; 71, drive motor; 72, drive circular plate; 73, V-block; 74, drive circular block; 75, V-groove; 8, coolant delivery assembly; 81, delivery pipe; 82, delivery cylinder; 83, outer pipe; 84, liquid inlet pipe; 85, heat exchange pipe; 86, liquid outlet pipe; 87, fixed block; 9, reciprocating push assembly; 91, rack; 92, gear; 93, reciprocating rod; 94, reset spring; 95, piston. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0043] Example 1, reference Figure 1-Figure 5, which is the first embodiment of the present invention, provides a Roots vacuum pump for vacuum glass production, including a Roots vacuum pump body 1, an air inlet 11 installed on the top of the Roots vacuum pump body 1, a connecting pipe 12 fixedly connected to the top of the air inlet 11, a vacuum glass furnace shell 13 installed on one side of the connecting pipe 12, a front cover 16 fixedly connected to the front end of the Roots vacuum pump body 1, and an air outlet 17 installed at the bottom of the Roots vacuum pump body 1, and also includes a protection unit installed on the Roots vacuum pump body 1; the protection unit includes a rotating protection component installed on the Roots vacuum pump body 1, and a cooling component installed on the Roots vacuum pump body 1, the rotating protection component includes a clamping rotary installed on the Roots vacuum pump body 1 A rotating assembly 2, a connecting assembly 3 installed on one side of the snap-fit ​​rotating assembly 2, and a tensioning assembly 4 installed in the snap-fit ​​rotating assembly 2; the snap-fit ​​rotating assembly 2 includes a fixed shaft 21 rotatably connected to a Roots vacuum pump body 1, a first sleeve 22 fixedly connected to the fixed shaft 21, a second sleeve 25 rotatably connected to the inner side of the first sleeve 22, a plurality of symmetrically distributed T-shaped rods 23 slidably connected to the first sleeve 22, a compression spring 24 fixedly connected between the T-shaped rod 23 and the first sleeve 22, the compression spring 24 is sleeved on the rod wall of the T-shaped rod 23, a plurality of symmetrically distributed strip grooves 26 are provided on the second sleeve 25, and one end of the T-shaped rod 23 away from the compression spring 24 is plugged into the inner side of the strip groove 26.

[0044] Specifically, when in use, the glass is placed in the vacuum glass furnace shell 13, the Roots vacuum pump body 1 is connected to the vacuum glass furnace shell 13 through the connecting pipe 12, the two rotors inside the Roots vacuum pump body 1 rotate synchronously in opposite directions, and then the inside of the connecting pipe 12 is evacuated through the air inlet 11, and under the action of the two rotors, the gas in the Roots vacuum pump body 1 is discharged from the air outlet 17, and then the inside of the vacuum glass furnace shell 13 is gradually evacuated. When the Roots vacuum pump body 1 is working, it will generate heat, so that its temperature gradually rises, and the Roots vacuum pump body 1 will gradually increase the temperature of the glass furnace shell 13. The protection unit is used to cool and protect the Roots vacuum pump body 1. The rotor of the Roots vacuum pump body 1 is protected by the rotating protection component. The cooling component is used to cool the Roots vacuum pump body 1. The second sleeve 25 is inserted into the first sleeve 22. Under the action of the compression spring 24, the T-shaped rod 23 is inserted into the inner side of the strip groove 26. When the second sleeve 25 rotates, the T-shaped rod 23 drives the first sleeve 22 to rotate, and drives the fixed shaft 21 to rotate. Since the fixed shaft 21 is fixedly connected to the rotating shaft of the rotor, the Roots vacuum pump body 1 is driven to rotate. The rotor in the Roots vacuum pump body 1 rotates. When the rotor rotates, due to friction with the air, heat is generated, causing the rotor to expand due to heat, so that the gap between the rotor and the inner wall of the Roots vacuum pump body 1 becomes smaller, causing the rotor to contact with the pump body, making it difficult for the rotor to rotate. Under the action of the tensioning assembly 4 opening, the T-shaped rod 23 is pushed out of the strip groove 26, and the compression spring 24 is stretched. When the T-shaped rod 23 is completely separated from the strip groove 26, when the second sleeve 25 rotates, the first sleeve 22 no longer rotates, so that the rotor no longer rotates. Under the action of the cooling component The temperature of the rotor and the pump body is gradually reduced, the tensioning assembly 4 contracts, and will no longer press the T-bar 23. The compression spring 24 will be reset, driving the T-bar 23 to re-insert with the inner side of the strip groove 26. When the second sleeve 25 rotates, it can drive the first sleeve 22 to rotate, so that the rotor rotates normally. When the temperature of the rotor and the pump body is high, the rotor will no longer rotate. When the temperature of the rotor and the pump body drops to the normal range, the rotor can continue to rotate, which protects the rotor and prevents the rotor from expanding due to heat. When it continues to rotate, it will cause friction and wear with the inner wall of the pump body.

[0045] Reference Figure 6 The connecting assembly 3 includes a plurality of connecting bars 31 fixedly connected to the Roots vacuum pump body 1 and symmetrically distributed, a connecting disk 32 fixedly connected to the plurality of connecting bars 31 , and a connecting shaft 33 movably connected to the connecting disk 32 .

[0046] Specifically, the connecting disk 32 is fixed by a plurality of connecting strips 31, and the connecting shaft 33 is limited by the connecting disk 32, so that the connecting shaft 33 can slide and rotate on the connecting disk 32. When the connecting shaft 33 rotates, it can drive the second sleeve 25 to rotate, and then drive the fixed shaft 21 to rotate, so that the connecting shaft 33 can rotate and slide stably, making the device more stable to use.

[0047] Reference Figure 7 and Figure 8 The tensioning assembly 4 includes a plurality of tensioning grooves 41 symmetrically distributed on the inner wall of the second sleeve 25, a plurality of fixing bars 42 symmetrically distributed and fixedly connected to the shaft wall of the connecting shaft 33 at one end close to the second sleeve 25, a tensioning frame 44 rotatably connected to the fixing bar 42 on the side away from the connecting shaft 33, a tensioning bar 43 rotatably connected to the tensioning frame 44 on the side away from the fixing bar 42, a tensioning block 45 fixedly connected to the tensioning bar 43, and an end of the tensioning block 45 away from the tensioning bar 43 is limitedly slidably connected to the inner side of the tensioning groove 41.

[0048] Specifically, when the connecting shaft 33 rotates, it drives the fixing bar 42 to rotate, drives the tension frame 44 and the tension bar 43 to rotate, drives the tension block 45 to rotate, and drives the second sleeve 25 to rotate, so that the rotor inside the Roots vacuum pump body 1 rotates normally. When the rotor expands due to heat and generates friction resistance with the pump body, the connecting shaft 33 rotates normally. However, during rotation, the rotor is subjected to friction resistance, so that the first sleeve 22 and the second sleeve 25 are subjected to friction resistance. At this time, the connecting shaft 33 is subjected to friction resistance and moves toward the inside of the second sleeve 25 during rotation, driving the fixing bar 42 to move, driving the tension frame 44 to rotate between the fixing bar 42 and the tension bar 43 close to the inner wall of the second sleeve 25, and under the action of the tension block 45 and the tensioning groove 41, the tension bar 43 moves toward the inner wall of the second sleeve 25. The second sleeve 25 is moved to the position where the T-bar 23 is gradually separated from the inner side of the strip groove 26. When the T-bar 23 is completely separated from the inner side of the strip groove 26, the second sleeve 25 will no longer drive the first sleeve 22 to rotate when it rotates. When the connecting shaft 33 is no longer subjected to friction resistance, that is, when the temperature of the rotor is reduced, no friction is generated between the pump body, and the connecting shaft 33 will move a distance from the second sleeve 25, driving the fixing bar 42 to move outside the second sleeve 25, driving the tensioning frame 44 to rotate away from the inner wall of the second sleeve 25 between the fixing bar 42 and the tensioning bar 43. Under the action of the tensioning block 45 and the tensioning groove 41, the tensioning bar 43 moves to the center of the second sleeve 25, so that the T-bar 23 is reconnected with the inner side of the strip groove 26, so that the rotor no longer rotates when the temperature rises, and can continue to rotate when the temperature drops.

[0049] Reference Figure 9-11The rotation protection component also includes an ejector assembly 5 installed on the tensioning assembly 4, a support assembly 6 installed on the connecting assembly 3, and a driving assembly 7 installed on one side of the connecting assembly 3; the ejector assembly 5 includes a plurality of ejector holes 55 symmetrically distributed and connected to the inner side of the strip groove 26, an ejector rod 56 fixedly connected to the tensioning strip 43, an ejector ring 54 slidably sleeved on the rod wall of the ejector rod 56, two ejector grooves 51 symmetrically distributed on the ejector rod 56, an ejector block 52 slidably connected to the inner side of the two ejector grooves 51, the two ejector blocks 52 are fixedly connected to the ejector ring 54, an ejector spring 53 fixedly connected between the ejector ring 54 and the tensioning strip 43, and the ejector spring 53 is sleeved on the outer side of the ejector rod 56.

[0050] Specifically, the tension strip 43 moves toward the inner wall of the second sleeve 25, driving the ejection rod 56 to move from the ejection hole 55 into the strip groove 26, so that the ejection ring 54 slides on the ejection rod 56 toward the tension strip 43. Under the action of the ejection block 52 and the ejection groove 51, the ejection ring 54 is limited when sliding on the ejection rod 56, and the ejection spring 53 is squeezed, so that the ejection rod 56 ejects the T-shaped rod 23 from the strip groove 26, and the tension strip 43 moves toward the center of the second sleeve 25. When the pump 20 is in motion, the ejector rod 56 is driven to move from the inner side of the strip groove 26 to the ejector hole 55. Under the action of the ejector spring 53, the ejector ring 54 slides on the ejector rod 56 away from the tensioning strip 43, so that the ejector ring 54 is reset on the ejector rod 56. At this time, the T-bar 23 is re-inserted into the inner side of the strip groove 26. When the rotor is subjected to greater friction resistance, the second sleeve 25 rotates and will no longer drive the first sleeve 22 to rotate, so that the rotor will not continue to rotate and cause wear between the pump body.

[0051] Example 2, reference Fig.10 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the support assembly 6 includes an active cavity 61 opened on the connecting shaft 33, a support rod 63 slidably connected to the end of the connecting shaft 33 close to the second sleeve 25, and a support spring 62 fixedly connected to one end of the support rod 63. The end of the support spring 62 away from the support rod 63 is fixedly connected to the inner wall of the active cavity 61, and the other end of the support rod 63 is fixedly connected to the inner wall of the second sleeve 25.

[0052] Specifically, when the connecting shaft 33 moves into the second sleeve 25, the support rod 63 moves into the active cavity 61 to compress the support spring 62. When the connecting shaft 33 no longer moves into the second sleeve 25, the support spring 62 is reset, and the support rod 63 moves toward the outside of the active cavity 61, so that the connecting shaft 33 moves a distance toward the outside of the second sleeve 25 to be reset. This not only supports and stabilizes the connecting shaft 33, but also resets the connecting shaft 33 after it moves into the second sleeve 25.

[0053] Reference Fig.11 The driving assembly 7 includes a driving motor 71 fixedly connected to the front cover 16, a driving circular plate 72 fixedly connected to the output shaft of the driving motor 71, two V-shaped blocks 73 fixedly connected to the driving circular plate 72 and symmetrically distributed, a driving circular block 74 fixedly connected to the connecting shaft 33, and two V-shaped grooves 75 symmetrically distributed on the driving circular block 74. The two V-shaped blocks 73 are respectively slidably connected to the inner sides of the two V-shaped grooves 75.

[0054] Specifically, the drive motor 71 is started to drive the drive circular plate 72 to rotate, and the V-shaped block 73 is driven to rotate. Under the action of the V-shaped groove 75, the V-shaped block 73 slides on the drive circular block 74, thereby pushing the drive circular block 74 to the side of the connecting shaft 33, and driving the drive circular block 74 to rotate, thereby pushing the connecting shaft 33 into the second sleeve 25, and driving the connecting shaft 33 to rotate, thereby driving the second sleeve 25 to rotate. When the second sleeve 25 is subjected to friction resistance, the connecting shaft 33 needs to provide a larger torsional force to drive it to rotate. Under the action of the V-shaped block 73 and the V-shaped groove 75, the drive circular block 74 is pushed to continue to move toward the side of the connecting shaft 33, so that the connecting shaft 33 continues to move into the second sleeve 25. Under the action of the tensioning assembly 4 and the ejection assembly 5, the T-bar 23 is ejected from the strip groove 26. At this time, the second sleeve 25 will no longer drive the first sleeve 22 to rotate. When the second sleeve 25 stops rotating and continues to rotate, the ejection rod 56 moves from the strip groove 26 to the ejection hole 55 under the reset action of the ejection spring 53 and the support spring 62. At this time, the ejection rod 56 will no longer eject the T-bar 23. Under the action of the compression spring 24, the T-bar 23 slides outside the second sleeve 25. When the T-bar 23 slides to the strip groove 26, under the reset action of the compression spring 24, the T-bar 23 moves into the strip groove 26. At this time, the second sleeve 25 rotates and drives the first sleeve 22 to rotate. However, the rotor is still in a state of thermal expansion at this time, and the first sleeve 22 is still subject to friction resistance. Under the action of the tensioning assembly 4 and the ejection assembly 5, the T-bar 23 continues to be ejected from the strip groove 26. Under the action of the ejection spring 53 and the support spring 62, the connecting shaft 33 repeatedly moves into and out of the second sleeve 25. The rest of the structure is the same as that of the first embodiment.

[0055] Example 3, reference Fig.12 and Fig.13, which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the cooling component includes a coolant delivery assembly 8 installed on the Roots vacuum pump body 1, and a reciprocating push assembly 9 installed on one side of the coolant delivery assembly 8; the coolant delivery assembly 8 includes a heat exchange tube 85 fixedly connected to the Roots vacuum pump body 1, a liquid outlet pipe 86 fixedly connected to one side of the heat exchange tube 85 and communicating with the interior of the heat exchange tube 85, a liquid inlet pipe 84 fixedly connected to the other side of the heat exchange tube 85 and communicating with the interior of the heat exchange tube 85, a fixed block 87 fixedly connected to the Roots vacuum pump body 1, a delivery cylinder 82 fixedly connected to the fixed block 87, a delivery tube 81 fixedly connected to one end of the delivery tube 82 and communicating with the interior of the delivery tube 82, a one-way liquid outlet valve fixedly connected to the delivery tube 81, a feed pipe fixedly connected to one side of the delivery tube 82, a one-way liquid inlet valve fixedly connected to the feed pipe, and an outer tube 83 fixedly connected to the end of the feed pipe away from the delivery tube 82.

[0056] Specifically, the discharge port of the coolant tank is fixedly connected to the outer tube 83, and the liquid inlet of the coolant tank is fixedly connected to the liquid outlet pipe 86. The coolant in the coolant tank will enter the outer tube 83. Under the action of the one-way liquid inlet valve, the coolant will enter the conveying cylinder 82 from the feed pipe. Under the action of the one-way liquid outlet valve, the coolant will enter the conveying pipe 81 and enter the heat exchange tube 85 from the liquid inlet pipe 84, absorbing the heat generated by the pump body, so that the temperature of the coolant in the heat exchange tube 85 increases. The increased coolant will re-enter the coolant tank from the liquid outlet pipe 86, and the cycle will be repeated to continuously take away the heat generated by the pump body, so that the temperature of the pump body gradually decreases.

[0057] Reference Figure 2 and Figure 3 The reciprocating pushing assembly 9 includes a gear 92 fixedly mounted on the shaft wall of the connecting shaft 33, a reciprocating rod 93 slidably connected to the end of the conveying cylinder 82 away from the conveying tube 81, a rack 91 fixedly connected to one end of the reciprocating rod 93, the rack 91 is meshedly connected to the gear 92, a piston 95 fixedly connected to the other end of the reciprocating rod 93, the piston 95 is sealingly and slidably connected to the inner side of the conveying cylinder 82, and a return spring 94 fixedly connected between the piston 95 and the inner wall of the conveying cylinder 82, and the return spring 94 is mounted on the rod wall of the reciprocating rod 93.

[0058] Specifically, when the temperature of the rotor and the pump body increases, under the action of the rotation protection component, the connecting shaft 33 repeatedly moves toward or away from the Roots vacuum pump body 1, and the connecting shaft 33 rotates continuously, thereby driving the gear 92 to rotate, and driving the gear 92 to move back and forth. When the gear 92 moves toward the Roots vacuum pump body 1, it will mesh with the rack 91, thereby driving the rack 91 to move away from the conveying cylinder 82, driving the reciprocating rod 93 to move toward the outside of the conveying cylinder 82, driving the piston 95 to move toward the outside of the conveying cylinder 82, squeezing the return spring 94, so that a negative pressure vacuum is formed between the conveying cylinder 82 and the piston 95, and in the single Under the action of the inlet valve, the coolant will enter the delivery tube 82 from the feed pipe. When the gear 92 moves away from the side of the Roots vacuum pump body 1, the gear 92 will no longer be meshed with the rack 91, and the reset spring 94 will reset, so that the reciprocating rod 93 and the piston 95 move into the delivery tube 82 to squeeze the coolant in the delivery tube 82. Under the action of the one-way liquid outlet valve, the coolant will enter the delivery tube 81, and the coolant will continuously enter the heat exchange tube 85 to take away the heat generated by the pump body. When the temperature of the pump body decreases, the connecting shaft 33 will no longer move back and forth repeatedly, and the gear 92 will no longer be meshed with the rack 91, so that the coolant will no longer enter the heat exchange tube 85. The rest of the structure is the same as that of Example 2.

[0059] Example 4, reference Figure 1 , which is the fourth embodiment of the present invention, provides: a vacuum glass furnace, including a vacuum glass furnace shell 13 fixedly connected to one end of a connecting pipe 12, an end cover 14 hinged to the front end of the vacuum glass furnace shell 13, and a supporting leg 15 fixedly connected to the bottom of the vacuum glass furnace shell 13.

[0060] Specifically, the end cover 14 is opened, and the glass is placed in the vacuum glass furnace shell 13 . The vacuum glass furnace shell 13 is evacuated through the Roots vacuum pump body 1 , and the support legs 15 provide a stable support for the vacuum glass furnace shell 13 .

[0061] Reference Figure 1 The vacuum glass furnace shell 13 is cylindrical.

[0062] Specifically, the cylindrical vacuum glass furnace shell 13 is more evenly heated, so that the production efficiency is higher, the energy consumption is lower, the structure is more stable, and the operation is safer.

[0063] In summary, the working principle of the present invention is as follows: when in use, the end cover 14 is opened, the glass is placed in the vacuum glass furnace shell 13, and the driving motor 71 is started to drive the driving circular plate 72 to rotate. Through the action of the V-shaped block 73 and the V-shaped groove 75, the driving circular block 74 is driven to slide and rotate, and the connecting shaft 33 is driven to move and rotate, and the second sleeve 25 is driven to rotate. Under the action of the clamping rotating component 2, the first sleeve 22 is driven to rotate, and then the fixed shaft 21 is driven to rotate, and the rotor is driven to rotate. When the rotor rotates, heat is generated by friction with the air, so that the temperature of the rotor and the pump body increases, and the heat expands. The friction resistance between the rotor and the pump body increases, so that the connecting shaft 33 is subjected to friction resistance when rotating. Then, when the driving motor 71 drives the connecting shaft 33 to rotate, the connecting shaft 33 continues to be pushed toward one side of the Roots vacuum pump body 1. Under the action of the tensioning component 4 and the ejecting component 5, the T-bar 23 is ejected from the strip groove 26. At this time, the second sleeve 25 rotates and will no longer drive the first sleeve 22 to rotate, that is, The rotor is no longer driven by the driving motor 71, and the second sleeve 25 can rotate freely. Under the reset action of the ejection spring 53 and the support spring 62, the connecting shaft 33 repeatedly moves into or out of the second sleeve 25, thereby driving the gear 92 to engage with the rack 91, and driving the rack 91 to move away from the conveying cylinder 82. Under the action of the one-way liquid inlet valve, the coolant will enter the conveying cylinder 82 from the feed pipe. Under the action of the one-way liquid outlet valve, the coolant will enter the conveying pipe 81, and the cycle will be repeated. The coolant will continuously enter the heat exchange tube 85 to take away the heat generated by the pump body. When the temperature of the pump body decreases, the connecting shaft 33 will no longer move back and forth repeatedly. Under the action of the compression spring 24, the T-bar 23 is re-inserted into the strip groove 26, so that the first sleeve 22 continues to rotate, and the rotor continues to rotate, which protects the rotor and avoids the wear between the rotor and the pump body due to the expansion of the rotor due to excessive temperature, causing deformation between the rotor and the pump body, and reducing the suction efficiency of the Roots vacuum pump body 1.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A Roots vacuum pump for vacuum glass production, comprising a Roots vacuum pump body (1), an air inlet (11) arranged at the top of the Roots vacuum pump body (1), a connecting pipe (12) arranged at the top of the air inlet (11), a vacuum glass furnace shell (13) arranged at one side of the connecting pipe (12), a front cover (16) arranged at the front end of the Roots vacuum pump body (1), and an air outlet (17) arranged at the bottom of the Roots vacuum pump body (1), characterized in that: It also includes a protection unit arranged on the Roots vacuum pump body (1); The protection unit comprises a rotation protection component arranged on a Roots vacuum pump body (1), and a cooling component arranged on the Roots vacuum pump body (1), wherein the rotation protection component comprises a clamping rotation assembly (2) arranged on the Roots vacuum pump body (1), a connecting assembly (3) arranged on one side of the clamping rotation assembly (2), and a tensioning assembly (4) arranged in the clamping rotation assembly (2); The clamping rotating assembly (2) comprises a fixed shaft (21) rotatably connected to a Roots vacuum pump body (1), a first sleeve (22) fixedly connected to the fixed shaft (21), a second sleeve (25) rotatably connected to the inner side of the first sleeve (22), a plurality of symmetrically distributed T-shaped rods (23) slidably connected to the first sleeve (22), a compression spring (24) fixedly connected between the T-shaped rod (23) and the first sleeve (22), the compression spring (24) being sleeved on the rod wall of the T-shaped rod (23), a plurality of symmetrically distributed strip grooves (26) being provided on the second sleeve (25), and an end of the T-shaped rod (23) away from the compression spring (24) being plugged into the inner side of the strip groove (26).

2. The Roots vacuum pump for vacuum glass production according to claim 1, characterized in that: The connection assembly (3) comprises a plurality of symmetrically distributed connection bars (31) fixedly connected to a Roots vacuum pump body (1), a connection disk (32) fixedly connected to the plurality of connection bars (31), and a connection shaft (33) movably connected to the connection disk (32).

3. The Roots vacuum pump for vacuum glass production according to claim 2, characterized in that: The tensioning assembly (4) comprises a plurality of tensioning grooves (41) symmetrically distributed and opened on the inner wall of the second sleeve (25), a plurality of fixing bars (42) symmetrically distributed and fixedly connected to the shaft wall of one end of the connecting shaft (33) close to the second sleeve (25), a tensioning frame (44) rotatably connected to the side of the fixing bar (42) away from the connecting shaft (33), a tensioning bar (43) rotatably connected to the side of the tensioning frame (44) away from the fixing bar (42), a tensioning block (45) fixedly connected to the tensioning bar (43), and the end of the tensioning block (45) away from the tensioning bar (43) is slidably connected to the inner side of the tensioning groove (41) in a limited position.

4. The Roots vacuum pump for vacuum glass production according to claim 3, characterized in that: The rotation protection component further comprises an ejection assembly (5) arranged on the tensioning assembly (4), a support assembly (6) arranged on the connecting assembly (3), and a drive assembly (7) arranged on one side of the connecting assembly (3); The ejection assembly (5) comprises a plurality of ejection holes (55) symmetrically distributed and arranged on the inner side of the second sleeve (25) and communicating with the inner side of the strip groove (26), an ejection rod (56) fixedly connected to the tension strip (43), an ejection ring (54) slidably sleeved on the rod wall of the ejection rod (56), two ejection grooves (51) symmetrically distributed and arranged on the ejection rod (56), an ejection block (52) slidably connected to the inner sides of the two ejection grooves (51), the two ejection blocks (52) are both fixedly connected to the ejection ring (54), an ejection spring (53) fixedly connected between the ejection ring (54) and the tension strip (43), and the ejection spring (53) is sleeved on the outer side of the ejection rod (56).

5. The Roots vacuum pump for vacuum glass production according to claim 4, characterized in that: The support assembly (6) comprises an active cavity (61) opened on the connecting shaft (33), a support rod (63) slidably connected to one end of the connecting shaft (33) close to the second sleeve (25), and a support spring (62) fixedly connected to one end of the support rod (63); one end of the support spring (62) away from the support rod (63) is fixedly connected to the inner wall of the active cavity (61), and the other end of the support rod (63) is fixedly connected to the inner wall of the second sleeve (25).

6. The Roots vacuum pump for vacuum glass production according to claim 4, characterized in that: The driving assembly (7) comprises a driving motor (71) fixedly connected to the front cover (16), a driving circular plate (72) fixedly connected to the output shaft of the driving motor (71), two symmetrically distributed V-shaped blocks (73) fixedly connected to the driving circular plate (72), a driving circular block (74) fixedly connected to the connecting shaft (33), and two symmetrically distributed V-shaped grooves (75) provided on the driving circular block (74), wherein the two V-shaped blocks (73) are respectively slidably connected to the inner sides of the two V-shaped grooves (75).

7. The Roots vacuum pump for vacuum glass production according to claim 2, characterized in that: The cooling component comprises a coolant delivery assembly (8) arranged on a Roots vacuum pump body (1), and a reciprocating push assembly (9) arranged on one side of the coolant delivery assembly (8); The cooling liquid delivery assembly (8) comprises a heat exchange tube (85) fixedly connected to the inside of the Roots vacuum pump body (1), a liquid outlet tube (86) fixedly connected to one side of the heat exchange tube (85) and communicating with the inside of the heat exchange tube (85), a liquid inlet tube (84) fixedly connected to the other side of the heat exchange tube (85) and communicating with the inside of the heat exchange tube (85), a fixed block (87) fixedly connected to the Roots vacuum pump body (1), a delivery tube (82) fixedly connected to the fixed block (87), a delivery tube (81) fixedly connected to one end of the delivery tube (82) and communicating with the inside of the delivery tube (82), a one-way liquid outlet valve fixedly connected to the delivery tube (81), a feed tube fixedly connected to one side of the delivery tube (82), a one-way liquid inlet valve fixedly connected to the feed tube, and an outer tube (83) fixedly connected to the end of the feed tube away from the delivery tube (82).

8. The Roots vacuum pump for vacuum glass production according to claim 7, characterized in that: The reciprocating driving assembly (9) comprises a gear (92) fixedly sleeved on the shaft wall of the connecting shaft (33), a reciprocating rod (93) slidably connected to one end of the conveying cylinder (82) away from the conveying pipe (81), a rack (91) fixedly connected to one end of the reciprocating rod (93), the rack (91) being meshingly connected to the gear (92), a piston (95) fixedly connected to the other end of the reciprocating rod (93), the piston (95) being sealingly slidably connected to the inner side of the conveying cylinder (82), and a return spring (94) fixedly connected between the piston (95) and the inner wall of the conveying cylinder (82), the return spring (94) being sleeved on the rod wall of the reciprocating rod (93).

9. A vacuum glass furnace, using the Roots vacuum pump for vacuum glass production as claimed in any one of claims 1 to 8, characterized in that: It comprises a vacuum glass furnace shell (13) fixedly connected to one end of a connecting pipe (12), an end cover (14) hinged to the front end of the vacuum glass furnace shell (13), and a supporting leg (15) fixedly connected to the bottom of the vacuum glass furnace shell (13).

10. The vacuum glass furnace according to claim 9, characterized in that: The vacuum glass furnace shell (13) is cylindrical.

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