An electric vacuum baffle valve and a vacuum device having the same

Abstract

The present invention relates to the field of vacuum equipment, and particularly to an electric vacuum baffle valve and a vacuum equipment having the same. An electric vacuum baffle valve includes: a valve body, a partition plate, a valve core assembly, an electromagnetic push block, a thimble, a stepping motor, and a control circuit board. The stepping motor drives the valve core assembly to rotate to move the baffle up and down. The baffle is provided with a second rubber ring. When the second rubber ring moves downward and abuts against the second sealing surface of the valve body, the first flange interface and the second flange interface are cut off, and the electric vacuum baffle valve is closed. When the second rubber ring moves upward and separates from the second sealing surface of the valve body, the first flange interface and the second flange interface are communicated, and the electric vacuum baffle valve is opened. This electric vacuum baffle valve uses a stepping motor as a driving element, effectively solving the defects of high noise, large vibration, and large energy consumption waste in the traditional technology.

Description

Technical Field

[0001] The present invention relates to the field of vacuum system pipeline control, and particularly to an electric vacuum baffle valve and a vacuum device having the same. Background Art

[0002] In the industry, electromagnetic vacuum baffle valves and pneumatic vacuum baffle valves are mostly used to control the on-off of vacuum pipelines. The electromagnetic vacuum baffle valve uses an electromagnet adsorption module as a driving module, and it consumes power continuously to maintain the open state of the electromagnetic coil after the valve is opened. Its disadvantages are that it generates huge noise and vibration when the magnet adsorbs, the vibration will affect the performance of the vacuum device, the huge noise reduces the user experience, and there is a large waste of energy consumption.

[0003] For the pneumatic vacuum baffle valve, it must be equipped with an air compressor as a drive and connected by a long air pipeline. The maintenance of the air pipeline is complex. If there is air leakage, it will cause energy consumption waste. The air compressor mostly has disadvantages such as large volume, large periodic operation noise and vibration, etc. At the same time, it increases the volume and cost of the equipment equipped with the air compressor, and reduces the equipment performance and user experience. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to change the defects of high noise, large vibration and high energy consumption in the prior art, so as to provide an electric vacuum baffle valve and a vacuum device having the same.

[0005] To solve the above problems, the present invention provides an electric vacuum baffle valve, including: a valve body, a partition plate, a valve core assembly, an electromagnetic push block, a first support stud, a second support stud, a motor bracket, a driving motor, a control circuit board, and a housing. The valve core assembly includes: a lead screw, a lead screw sleeve, a ball, a ball sleeve, a spring, a sealing bellows, a sealing flange, and a baffle.

[0006] The valve body has a cuboid main body and a cylindrical inner cavity. A first flange interface is provided on its side surface, and the axis of the first flange interface is perpendicular to the axis of the inner cavity and perpendicular to the side surface of the valve body. A stepped groove is provided on the upper end surface of the valve body, and the groove plane is a first sealing surface, which abuts against the sealing flange by a first rubber ring, and the upper end surface of the valve body abuts against the partition plate. The lower end of the valve body is provided with a second flange interface, and the axis of the second flange interface is coaxial with the axis of the inner cavity, and the inner plane of the second flange interface is a second sealing surface.

[0007] The partition plate is a square flat plate, its lower surface abuts against the upper end surface of the valve body and the sealing flange, and its upper surface abuts against the housing, the electromagnetic push block, and the first support stud. A circular stepped groove is provided at the center position of the partition plate, and the axis of the groove is coaxial with the axis of the inner cavity of the valve. Below the electromagnetic push block outside the groove, a plurality of small circular holes evenly distributed in a circumferential direction are provided, the small circular holes penetrate through the partition plate, and a thimble is respectively arranged in each small circular hole.

[0008] A sealed bellows, which is a cylindrical metal bellows. One end of it is provided with an annular sealing flange. A first rubber ring is sleeved on the sealing flange and extends to the partition plate, abuts against the partition plate, and at the same time abuts against the valve body by the first rubber ring. The other end of the sealed bellows abuts against the baffle.

[0009] The baffle is a circular flat plate. There is a groove at the center position of the upper surface. The groove abuts against the lead screw. The baffle can move linearly up and down along the axis of the lead screw. The outer edge of the groove protrudes upward and abuts against the bellows. There is a groove on the lower surface, and a second rubber ring is arranged in the groove.

[0010] The valve core assembly includes a lead screw, a lead screw sleeve, balls, a ball sleeve, a spring, a sealed bellows, a sealing flange, and a baffle. The lead screw sleeve has its central axis coaxial with the central axis of the bearing. One end is provided with a thread that penetrates the bearing and is connected to the stepping motor shaft. The other end is a cylindrical shape sleeved outside the lead screw. There are a plurality of round holes on the cylinder, evenly distributed in the circumferential direction. Each round hole is respectively provided with a ball, and the driving motor can drag it to rotate simultaneously with the ball. The ball sleeve is of a similar cylindrical shape, sleeved outside the lead screw sleeve, and can move linearly up and down along its axis. Its inner ring is provided with a conical surface, and the conical surface abuts against the ball. The lower end surface is provided with a step, which abuts against the spring. The spring is compressed between the ball sleeve and the baffle. The upper end surface of the ball sleeve abuts against the ejector pin. One side of the ball abuts against the conical surface of the ball sleeve and the other side abuts against the thread groove of the lead screw. The lead screw is arranged inside the lead screw sleeve. The lead screw is provided with a plurality of semi-circular thread grooves, and each thread groove respectively abuts against the ball. The lower end extends into the groove of the baffle and abuts against the baffle. The ball sleeve can drive the ball to rotate along the thread groove of the lead screw, driving the lead screw and the baffle to move linearly up and down along its axis. The sealed bellows abuts against the sealing flange at its upper end and abuts against the baffle at its lower end, making the inner cavity of the valve body airtight and isolated from other components, and having the function of restricting the rotation of the lead screw and the baffle.

[0011] The electromagnetic push block is circular. There is a copper coil wound around its outer ring. When the coil is energized, it can generate an electromagnetic force to make the electromagnetic push block move along its axis and generate a thrust. The axis of the electromagnetic push block is coaxial with the central axis of the bearing. Its lower plane abuts against the partition plate and at the same time abuts against one end of the ejector pin. When energized, the electromagnetic push block can push the ejector pin downward.

[0012] The first support stud has a bolt at its lower end that abuts against the partition plate, and its upper end extends upward to abut against the motor bracket and is provided with a threaded hole.

[0013] The second support stud has a bolt at its lower end that abuts against the motor bracket, and its upper end extends upward to abut against the control circuit board and is provided with a threaded hole.

[0014] The stepping motor is the power source for the on-off of the valve. It abuts against the motor bracket. The driving motor shaft penetrates the motor bracket and the electromagnetic push block and abuts against the lead screw sleeve.

[0015] The technical solution of the present invention has the following advantages: A stepper motor is used as the driving element. The stepper motor drives the lead screw sleeve and the ball to rotate along the lead screw thread groove, driving the lead screw and the baffle to move linearly up and down, thereby realizing the cut-off and connection of the electric vacuum baffle valve. The stepper motor has the characteristics of quiet operation and tiny vibration, and only a tiny current is required to maintain the standby state of the control circuit board after the cut-off or connection action, effectively solving the defects of high noise, large vibration, and large energy consumption waste in the traditional technology.

[0016] To solve the problem that the stepper motor cannot automatically cut off the electric vacuum baffle valve during abnormal power failure, a special valve core component structure is adopted. During abnormal power failure, the control board uses the remaining power to drive the electromagnetic push block to push the ejector pin downward. The ejector pin abuts against the ball sleeve, causing the ball sleeve to move downward simultaneously. The ball is radially displaced along the conical surface of the ball sleeve under the extrusion force of the lead screw thread groove until it disengages from the lead screw thread groove. The baffle connected to the lead screw moves downward under the action of the spring force, thereby realizing the function of closing during abnormal power failure. Description of the Drawings

[0017] The present invention will be further described below with reference to the drawings and embodiments.

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] Figure 2 is a schematic structural diagram of the valve core assembly of the present invention.

[0020] Description of the reference numerals: 1. Control circuit board, 2. Stepper motor, 3. Electromagnetic push block, 4. Bearing, 5. Ejector pin, 6. Valve core assembly, 7. Valve body, 8. Second flange interface, 9. Second rubber ring, 10. First exhaust interface, 11. First rubber ring, 12. Partition board, 13. First support stud, 14. Motor bracket, 15. Second support stud, 16. Outer shell, 601. Sealing flange, 602. Lead screw sleeve, 603. Ball sleeve, 604. Ball, 605. Lead screw, 606. Sealing bellows, 607. Spring, 608. Baffle. Detailed Embodiments

[0021] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "abutment", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] The present invention includes a valve body 7, a partition plate 12, a valve core assembly 6, an electromagnetic pusher 3, a thimble 5, a stepping motor 2, and a control circuit board 1. Three round holes are provided at the lower end of the lead screw sleeve 602, and the round holes are evenly distributed in the circumferential direction. A ball 604 is installed in each round hole. The outer side of the ball 604 abuts against the conical surface of the ball sleeve 603, and the inner sides respectively abut against three semi-circular thread grooves provided on the lead screw 605. The stepping motor 2 drives the lead screw sleeve 602 and the ball 604 to rotate. The ball 604 rotates along the thread groove of the lead screw 605, driving the lead screw 605 and the baffle 608 to move up and down linearly. When the second rubber ring 9 moves downward and abuts against the second sealing surface of the valve body, the first flange interface 10 and the second flange interface 8 are cut off, and the electric vacuum baffle valve is closed. When the second rubber ring 9 moves upward and separates from the second sealing surface of the valve body 7, the first flange interface 10 and the second flange interface 8 are communicated, and the electric vacuum baffle valve is opened.

[0023] The partition plate 12 abuts against the annular electromagnetic pusher 3. A circular stepped groove is provided at the center of the partition plate 12. The axis of the groove is coaxial with the axis of the inner cavity of the valve body 7. A bearing 4 is provided in the groove. Three small round holes are provided outside the groove and below the electromagnetic pusher 3, and the small round holes penetrate through the partition plate 12. A thimble 5 is respectively provided in each small round hole. The upper end of the thimble 5 abuts against the electromagnetic pusher 3, and the lower end abuts against the ball sleeve 603. In case of abnormal power failure, the control circuit board 1 uses the remaining power to drive the electromagnetic pusher 3 to push the thimble 5 downward. The thimble 5 abuts against the ball sleeve 603, causing the ball sleeve 603 to move downward at the same time. The ball 604 is radially displaced along the conical surface of the ball sleeve 603 under the extrusion force of the thread groove of the lead screw 605 until it disengages from the thread groove of the lead screw 605. The baffle 608 is connected to the lead screw 605 and moves downward under the action of the spring force, thereby realizing the function of cutting off in case of abnormal power failure.

[0024] The present invention also provides a vacuum device, which has the electric vacuum baffle valve provided by the present invention. By installing the electric vacuum baffle valve, the noise, vibration, and energy consumption waste of the vacuum device are effectively reduced, and the performance and user experience of the vacuum device are improved.

[0025] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. An electric vacuum baffle valve, comprising a valve body (7), a partition plate (12), a bearing (4), an electromagnetic push block (3), a valve core assembly (6), and a stepping motor (2). A plurality of round holes are provided at the lower end of a lead screw sleeve (602), and the plurality of round holes are evenly distributed in the circumferential direction. A ball (604) is installed in each round hole. The outer side of the ball (604) abuts against the conical surface of a ball sleeve (603), and the inner side thereof respectively abuts against a plurality of semi-circular thread grooves provided on a lead screw (605). The stepping motor (2) can drive the lead screw sleeve (602) and the ball (604) to rotate. The ball (604) rotates along the thread groove of the lead screw (605), driving the lead screw (605) and the baffle (608) to move linearly up and down. The outer side of the ball (604) abuts against the conical surface of the ball sleeve (603). The lower end of the ball sleeve (603) abuts against one end of a spring (607), and the other end of the spring (607) abuts against the baffle (608). The spring (607) is in a state of elastic compression. The ball sleeve (603) can move linearly downward and can return to its original position under the action of the spring (607). The partition plate (12) abuts against an annular electromagnetic push block (3). A circular concave bearing (4) installation position is provided at the center of the partition plate (12). Three small round holes are provided outside the concave platform, and the three small round holes are located below the electromagnetic push block (3). The three small round holes are evenly distributed around the circumference of the concave platform. A cylindrical ejector pin (5) is respectively installed in each small round hole. The upper end of the ejector pin (5) abuts against the electromagnetic push block (3), and the lower end thereof abuts against the ball sleeve (603). The electromagnetic push block (3) can push the ejector pin (5) and the ball sleeve (603) to move linearly downward.

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