A Roots slide valve vacuum unit

Abstract

The present invention relates to the technical field of vacuum equipment, and in particular to a Roots slide valve vacuum unit. The present invention provides an elastic ring and sleeves an elastic membrane on the elastic ring. When a connector is not connected, the elastic ring can shield an air inlet pipe to reduce the entry of dust and particles. When making a connection, the connector is first connected to a device to be evacuated, and then the connector is connected to the air inlet pipe. When the elastic ring is not rotated out, an insertion pipe of the connector is blocked by the elastic membrane and cannot be inserted. During the rotation process, the connector can drive the elastic ring to rotate through a magnetic block, so that the elastic ring is rotated out of an installation groove, so that the elastic ring moves with the installation groove. After the elastic ring is rotated out, the elastic membrane can be removed. At this time, the elastic ring can be rotated back in so that the elastic head can pass through the elastic ring and be threadedly connected to the air inlet pipe to complete the connection. During this period, it is also difficult for external dust and particles to enter.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum equipment, in particular to a Roots slide valve vacuum unit. Background Art

[0002] Roots sliding valve vacuum unit is a vacuum equipment which is composed of Roots pump as main pump and sliding valve pump as front pump in series. This kind of unit has the advantages of compact structure, convenient use, high efficiency and energy saving, high vacuum degree, etc. It can obtain high vacuum degree at high speed and high efficiency when in use, extract a large amount of gas in a short time, and can work continuously for a long time to meet the long-term vacuum treatment.

[0003] The Roots slide valve vacuum unit under the existing technology can be applied to a variety of industrial scenarios, such as the electric power industry, vacuum coating, vacuum smelting, etc., but the Roots slide valve vacuum unit is more sensitive to dust and particulate matter during use. Dust entering the vacuum unit can easily cause problems such as rotor wear, jamming or unstable operation, affecting the performance and life of the vacuum unit. Summary of the invention

[0004] In order to solve the problem that the Roots slide valve vacuum unit in the prior art is sensitive to dust and particulate matter during use, and dust entering the vacuum unit can easily cause rotor wear, jamming or unstable operation, affecting the performance and life of the vacuum unit, the present application provides a Roots slide valve vacuum unit, and the specific solution is as follows.

[0005] A Roots slide valve vacuum unit comprises a frame, a Roots pump and a slide valve pump are arranged on the frame, the Roots pump and the slide valve pump are communicated, an air inlet pipe is arranged on the Roots pump, an air outlet pipe is arranged on the slide valve pump, a connector is detachably connected to the air inlet pipe, one end of the connector is used to connect a device to be vacuumed, and the other end of the connector is used to be detachably connected to the air inlet pipe;

[0006] An elastic ring is arranged on one side of the air intake pipe close to the connector, and the elastic ring corresponds to the shape of the connector. A mounting groove is provided on the air intake pipe corresponding to the elastic ring, and the mounting groove is communicated with the outside. One side of the elastic ring is hinged in the mounting groove, and a magnetic block is arranged on the other side of the elastic ring. A magnetic block is arranged on the connector corresponding to the magnetic block, and the magnetic blocks are adsorbed to each other, and the elastic ring can be rotated out of the mounting groove to the outside under adsorption;

[0007] The connector is also provided with an insertion tube, which is slidably connected to the connector and is used to pass through an elastic ring and be threadedly connected to the air inlet pipe, and the insertion tube can completely cover the installation groove;

[0008] The elastic ring is detachably connected to an elastic membrane and the elastic membrane is sleeved on the elastic ring. The elastic membrane is used to completely cover the air inlet pipe. The elastic membrane abuts against the groove wall of the installation groove. The structure of the air outlet pipe is the same as that of the air inlet pipe and a connector is detachably connected to the air outlet pipe.

[0009] By adopting the above technical scheme, an elastic envelope is set on the elastic ring, and the elastic ring can block the air intake pipe when the connector is not connected, reducing the entry of dust and particulate matter. When connecting, the connector is first connected to the equipment to be exhausted, and then the connector is connected to the air intake pipe. When the elastic ring is not rotated out, the insertion tube of the connector is blocked by the elastic envelope and cannot be inserted. During the rotation process, the connector can drive the elastic ring to rotate through the magnetic block, so that the elastic ring is rotated out of the installation groove, so that the elastic ring moves with the installation groove. After the elastic ring is rotated out, the elastic envelope can be removed, and at this time, the elastic ring can be rotated back in so that the elastic head can pass through the elastic ring and be threadedly connected to the air intake pipe to complete the connection. During this period, it is also difficult for external dust and particulate matter to enter. During subsequent use, the unused elastic envelope can be replaced for re-shielding, reducing the dust on the used elastic envelope from falling into.

[0010] Optionally, the structure of the air outlet pipe is the same as that of the air inlet pipe and a connector can be detachably connected to the air outlet pipe.

[0011] By adopting the above technical solution and arranging the same structure and the same connector at the air outlet pipe, the situation in which dust and particles enter the air outlet pipe due to the intrusion of dust and particles into the air outlet pipe can also be reduced.

[0012] Optionally, the elastic ring includes a ring body, the ring body is provided with a fracture, the elastic ring has a tendency to move toward both sides of the fracture, and the fracture is arranged between a hinge of the elastic ring and the magnetic block.

[0013] By adopting the above technical solution, the elastic ring can move toward both sides of the fracture, thereby adding a reverse force to the elastic envelope when the elastic envelope is sleeved on the elastic ring, and the elastic envelope can be fixed on the elastic ring more stably, reducing the possibility of the elastic envelope falling off.

[0014] Optionally, a limiting ring is provided on the insertion tube, and a clearance groove is provided in the connecting head corresponding to the limiting ring, and the limiting ring is embedded in the clearance groove. A sealing groove is also provided at one end of the connecting head close to the air intake pipe, and the sealing groove is connected to the clearance groove. A sealing ring is provided in the sealing groove, and the sealing ring is used to abut the limiting ring.

[0015] By adopting the above technical solution, a limit ring is set, which can limit the penetration tube to the inside of the connecting head, thereby reducing the possibility of the penetration tube falling off. By setting a sealing ring, the limit ring can be pushed towards the sealing ring under the action of air pressure during vacuuming, thereby achieving sealing at the fiber ring, reducing the possibility of loose sealing during vacuuming, and further increasing the vacuuming effect.

[0016] Optionally, a shielding ring is provided at a position on the air intake pipe corresponding to the mounting groove, and the shielding ring is threadedly connected to the air intake pipe, and the shielding ring completely shields the mounting groove.

[0017] By adopting the above technical solution, a shielding ring is arranged on the air intake pipe. The shielding ring can be detachably connected to the air intake pipe. The shielding ring can further shield the installation groove, thereby further reducing the entry of dust from the installation groove. Only after the shielding ring is removed can the elastic ring be taken out for work, thereby further reducing the impact of dust on the equipment.

[0018] Optionally, a clamping groove is provided on the shielding ring, and a clamping block is provided on the connecting head corresponding to the clamping groove, and the clamping groove is for the clamping block to be embedded.

[0019] By adopting the above technical solution, the shielding ring and the connector can be snap-connected, so when the connector is inserted into the connection, the shielding ring can be removed through the connector first, and then the connector can be installed, further improving the convenience of removing the disassembly ring.

[0020] Optionally, a side of the shielding ring close to the mounting groove abuts against the elastic envelope.

[0021] By adopting the above technical solution, the shielding ring and the elastic envelope are in contact with each other, which can further reduce the dust from entering through the shielding ring and further enhance the sealing effect.

[0022] Optionally, oil is applied at the point where the elastic envelope abuts against the groove wall of the installation groove.

[0023] By adopting the above technical solution, oil is applied to the elastic envelope and the groove wall of the installation groove, and the oil can form an oil seal between the installation groove and the elastic envelope, which can further reduce the entry of dust from the installation groove and further improve the sealing performance.

[0024] In summary, this application has at least the following beneficial effects:

[0025] The present application solves the problem that the Roots slide valve vacuum unit in the prior art is sensitive to dust and particulate matter during use, and dust entering the vacuum unit can easily cause rotor wear, jamming or unstable operation, thus affecting the performance and life of the vacuum unit. The present application provides an elastic ring for shielding the Roots valve and the slide valve pump. The elastic coating on the elastic ring can block dust and particulate matter, thereby reducing the situation where dust and particulate matter enter the interior. When the connector is connected, the elastic ring can be turned out, and the connector can be normally installed after the elastic coating is removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a stereogram of this embodiment.

[0027] Figure 2 is a cross-sectional view of this embodiment.

[0028] Figure 3 It is a stereoscopic diagram of this embodiment, mainly used to show the state after the shielding ring is removed.

[0029] Figure 4 3D is a three-dimensional diagram of the elastic ring in this embodiment.

[0030] Description of reference numerals:

[0031] 1. Frame;

[0032] 2. Roots pump; 21. air inlet pipe; 22. shielding ring; 221. clamping groove;

[0033] 3. Sliding valve pump;

[0034] 4. Connector; 41. Insertion tube; 411. Limiting ring; 42. Limiting groove; 43. Sealing groove; 44. Clamping block;

[0035] 5. Elastic ring; 51. Ring body; 52. Elastic envelope; 53. Fracture; 54. Magnetic block. DETAILED DESCRIPTION

[0036] The present application is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0037] A Roots slide valve vacuum unit, such as Figure 1 and Figure 2 As shown, it includes a frame 1, on which a Roots pump 2 and a slide valve pump 3 are arranged, and the Roots pump 2 and the slide valve pump 3 are connected. The Roots pump 2 is provided with an air inlet pipe 21, and the slide valve pump 3 is provided with an air outlet pipe. The air inlet pipe 21 is detachably connected with a connector 4, one end of which is used to connect a device to be vacuumed, and the other end of which is used to be detachably connected to the air inlet pipe 21. In specific implementation, the vacuum unit formed by the cooperation of the Roots pump 2 and the slide valve pump 3 can quickly and efficiently extract air.

[0038] like Figure 2 and Figure 3 As shown, an elastic ring 5 is provided on one side of the air inlet pipe 21 close to the connector 4, and the elastic ring 5 corresponds to the shape of the connector 4. A mounting groove is provided on the air inlet pipe 21 corresponding to the elastic ring 5, and the mounting groove is connected to the outside. One side of the elastic ring 5 is hinged in the mounting groove, and a magnetic block 54 is fixedly provided on the other side of the elastic ring 5. A magnetic block 54 is fixedly provided on the connector 4 corresponding to the magnetic block 54, and the magnetic blocks 54 are adsorbed to each other, and the elastic ring 5 can be rotated out of the mounting groove to the outside under adsorption. In specific implementation, when the connector 4 is docked with the air inlet pipe 21, the rotation of the connector 4 can drive the elastic ring 5 to rotate outward and rotate out of the rotation groove.

[0039] like Figure 2 and Figure 3 As shown, the connector 4 is also provided with an insertion tube 41, which is slidably connected to the connector 4, and is used to pass through the elastic ring 5 and be threadedly connected to the air inlet pipe 21, and the insertion tube 41 can completely cover the installation groove. In specific implementation, the insertion tube 41 is provided with an external thread, and the air inlet pipe 21 is provided with an internal thread, thereby realizing a threaded connection.

[0040] like Figure 2 and Figure 4 As shown, the elastic ring 5 is detachably connected with an elastic coating 52 and the elastic coating 52 is sleeved on the elastic ring 5. The elastic coating 52 is used to completely cover the air inlet pipe 21, and the elastic coating 52 abuts against the groove wall of the installation groove. In specific implementation, the structure of the air outlet pipe is the same as that of the air inlet pipe 21, and the air outlet pipe is also detachably connected with a connector 4. When the connector 4 is installed, the insertion tube 41 will be blocked by the elastic coating 52. Then, the elastic ring 5 can be rotated out by rotating the connector 4. At this time, the elastic coating 52 can be manually removed, and the elastic ring 5 can be pushed back into the installation groove for reset. At this time, the insertion tube 41 can be inserted into the air inlet pipe 21 for threaded connection. Due to the threaded connection of the insertion tube 41, the insertion tube 41 is restricted from displacement. At this time, the connector 4 can be rotated again to connect the connector 4 to the air inlet pipe 21, thereby limiting the movement of the connector 4 and completing the connection. In addition, the time of contact with the outside world during the connection process is less.

[0041] like Figure 2 and Figure 4As shown, the elastic ring 5 includes a ring body 51, and a break 53 is formed on the ring body 51. The elastic ring 5 has a tendency to move toward both sides of the break 53. The break 53 is arranged between the hinge of the elastic ring 5 and the magnetic block 54. In specific implementation, the elastic ring 5 is made of a material with good elasticity, such as a copper ring or a polyethylene ring, which can be reasonably deformed during feeding to provide normal shielding. The elastic envelope 52 is sleeved on the ring body 51 during wrapping to shield the break 53. At the same time, due to the external elastic force of the ring body 51, the elastic envelope 52 can be fixed, thereby achieving the installation of the elastic envelope 52.

[0042] like Figure 2 and Figure 3 As shown, a limiting ring 411 is provided on the insertion tube 41, and a clearance groove is provided in the connector 4 corresponding to the limiting ring 411, and the limiting ring 411 is embedded in the clearance groove. A sealing groove 43 is also provided at one end of the connector 4 close to the air inlet pipe 21, and the sealing groove 43 is connected to the clearance groove. A sealing ring is provided in the sealing groove 43, and the sealing ring is used to abut the limiting ring 411. In specific implementation, under the action of the limiting ring 411, the insertion tube 41 can be embedded in the inside of the connector 4 and restricted in the connector 4. After installation, the limiting ring 411 forms an abutment with the sealing ring, which can reduce the situation of dust entering from the gap and improve the sealing performance. Due to the extraction of vacuum, the insertion tube 41 can be pulled toward the side of the air inlet pipe 21, and the insertion tube 41 can form an abutment with the sealing ring, further improving the sealing performance.

[0043] like Figure 1 and Figure 2 As shown, a shielding ring 22 is provided at a position corresponding to the mounting groove on the air inlet pipe 21, and the shielding ring 22 is threadedly connected to the air inlet pipe 21, and the shielding ring 22 completely shields the mounting groove. A clamping groove 221 is provided on the shielding ring 22, and a clamping block 44 is provided on the connector 4 corresponding to the clamping groove 221, and the clamping groove 221 is for the clamping block 44 to be embedded. In specific implementation, the shielding ring 22 can shield the mounting groove to reduce the situation where dust enters from the mounting groove. When installing the connector 4, the shielding ring 22 can be matched and connected through the connector 4. At this time, rotating the connector 4 can first drive the shielding ring 22 to rotate. The shielding ring 22 can loosen the threaded connection as the connector 4 rotates, and then falls off. At this time, the connector 4 is continued to rotate to rotate the elastic ring 5 out of the mounting groove, so that the elastic envelope 52 is removed.

[0044] like Figure 2 and Figure 3 As shown, the side of the shielding ring 22 close to the mounting groove abuts against the elastic membrane 52. The elastic membrane 52 is smeared with oil at the abutment point with the groove wall of the mounting groove. In specific implementation, the oil of the elastic membrane 52 can form an oil seal at the groove wall of the mounting groove, thereby further reducing the situation where dust enters from the mounting groove.

[0045] Working principle: During installation, the connector 4 is connected to the air inlet pipe 21. During the connection process, the insertion tube 41 is first blocked by the elastic coating 52 and cannot enter. Then, by rotating the connector 4, the blocking ring 22 at the installation groove is first removed, and then the elastic ring 5 can be turned out by continuing to rotate. After the elastic ring 5 is turned out, the elastic coating 52 is removed. After the elastic ring 5 is reinserted, the insertion tube 41 can be inserted into the connector 4 for connection. At this time, the connector 4 can be threadedly connected to the air inlet pipe 21 with the help of the insertion tube 41. After the threaded connection, the position of the insertion tube 41 and the connector 4 can be fixed, thereby completing the connection. The air outlet pipe is also connected with the same structure. At this time, vacuuming can be achieved. When the vacuuming is completed, the elastic ring 5 can be pulled out again after removing the connector 4 to cover it with a new elastic coating 52, thereby isolating the inside from the outside again.

[0046] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A Roots slide valve vacuum unit, comprising a frame (1), on which a Roots pump (2) and a slide valve pump (3) are arranged, wherein the Roots pump (2) and the slide valve pump (3) are connected, and characterized in that: The Roots pump (2) is provided with an air inlet pipe (21), the slide valve pump (3) is provided with an air outlet pipe, the air inlet pipe (21) is detachably connected with a connector (4), one end of the connector (4) is used to connect to a device that needs to be vacuumed, and the other end of the connector (4) is used to be detachably connected to the air inlet pipe (21); An elastic ring (5) is arranged on one side of the air intake pipe (21) close to the connector (4), the elastic ring (5) corresponds to the shape of the connector (4), a mounting groove is provided on the air intake pipe (21) corresponding to the elastic ring (5), the mounting groove is communicated with the outside, one side of the elastic ring (5) is hinged in the mounting groove, and a magnetic block (54) is arranged on the other side of the elastic ring (5), a magnetic block (54) is arranged on the connector (4) corresponding to the magnetic block (54), the magnetic blocks (54) are mutually adsorbed, and the elastic ring (5) can be rotated out of the mounting groove to the outside under adsorption; The connector (4) is also provided with an insertion tube (41), the insertion tube (41) is slidably connected to the connector (4), the insertion tube (41) is used to pass through the elastic ring (5) and be threadedly connected to the air inlet pipe (21), and the insertion tube (41) can completely cover the installation groove; The elastic ring (5) is detachably connected to an elastic envelope (52) and the elastic envelope (52) is sleeved on the elastic ring (5); the elastic envelope (52) is used to completely cover the air inlet pipe (21); the elastic envelope (52) abuts against the groove wall of the installation groove; the structure of the air outlet pipe is the same as that of the air inlet pipe (21) and a connector (4) is detachably connected to the air outlet pipe.

2. A Roots slide valve vacuum unit according to claim 1, characterized in that: The elastic ring (5) comprises a ring body (51), the ring body (51) is provided with a break (53), the elastic ring (5) has a tendency to move towards both sides of the break (53), and the break (53) is arranged between the hinge of the elastic ring (5) and the magnetic block (54).

3. A Roots slide valve vacuum unit according to claim 1, characterized in that: A limit ring (411) is provided on the insertion tube (41), a clearance groove is provided in the connector (4) corresponding to the limit ring (411), the limit ring (411) is embedded in the clearance groove, and a sealing groove (43) is also provided at one end of the connector (4) close to the air inlet pipe (21), the sealing groove (43) is communicated with the clearance groove, a sealing ring is provided in the sealing groove (43), and the sealing ring is used to abut against the limit ring (411).

4. A Roots slide valve vacuum unit according to claim 1, characterized in that: A shielding ring (22) is provided at a position on the air intake pipe (21) corresponding to the mounting groove, the shielding ring (22) is threadedly connected to the air intake pipe (21), and the shielding ring (22) completely shields the mounting groove.

5. A Roots slide valve vacuum unit according to claim 4, characterized in that: The shielding ring (22) is provided with a clamping groove (221), and a clamping block (44) is provided on the connector (4) corresponding to the clamping groove (221), and the clamping groove (221) is used for the clamping block (44) to be embedded.

6. A Roots slide valve vacuum unit according to claim 4, characterized in that: The side of the shielding ring (22) close to the installation groove abuts against the elastic envelope (52).

7. The Roots slide valve vacuum unit according to claim 1, characterized in that: The portion where the elastic envelope (52) abuts against the groove wall of the installation groove is coated with oil.

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