Vacuum flapper valve

Abstract

The utility model provides a vacuum baffle valve belongs to mechanical technical field. It solved the problem of the reliability of being unable to guarantee under the electronic control state while improving the applicability. The vacuum baffle valve of this includes valve body, the cylinder of being connected to the upper end of valve body, the valve core of being located in the valve body and being driven by the piston rod of cylinder and the two magnetic switches of being set up in the shell outside of cylinder, the piston of cylinder is the circular block shape of being big down small, the lower part outer periphery side of piston is connected with the magnetic block of being annular, the lower part of piston is detachably connected with the limit piece of being annular, and the magnetic block is along the vertical direction and leans between the limit piece and the upper part of piston. It has the advantages of improving the applicability while improving the working reliability under the electronic control state, the operation convenience when changing control mode and the like.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to vacuum baffle valves. Background Technology

[0002] Vacuum baffle valves are used to connect or disconnect the airflow in vacuum pipelines, and are suitable for media such as pure air and non-corrosive gases. Depending on the actual operating conditions, vacuum baffle valves are divided into purely manual control types and electronic control types. An example of an electronically controlled vacuum baffle valve is an internally heated pneumatic baffle valve disclosed in patent application number 202310434671.8. It includes a valve body shell, a cylinder, a valve stem assembly, and a valve core assembly. The cylinder is located above the valve body shell and is connected to it. The valve stem assembly and valve core assembly are both located inside the valve body shell. A piston is located inside the cylinder, and the valve stem assembly extends into the cylinder and connects to the piston. Airflow within the cylinder is controlled by a solenoid valve. The cylinder includes a cylinder body and a cylinder head, with the lower part of the cylinder body connected to... The valve body is connected to the outer shell, and the cylinder head is positioned above the cylinder body. Mounting slots are provided on both the cylinder body and cylinder head for mounting magnetic switches. The magnetic switches are slidably mounted inside the mounting slots. There are two mounting slots and two magnetic switches, both electrically connected to the solenoid valve. One magnetic switch is in a high position corresponding to the valve being open, and the other is in a low position corresponding to the valve being closed. A rubber magnetic ring is also installed inside the cylinder body, embedded in the side wall of the piston. The rubber magnetic ring cooperates with the magnetic switches to provide feedback on the valve's status. When the valve is open, the piston moves upward, and the rubber magnetic ring moves with the piston. When it reaches a position that coincides with the high-position magnetic switch, the magnetic switch senses the valve and transmits a signal that the valve is open, which in turn causes the solenoid valve to cut off the air supply to the cylinder. When the valve is closed, the piston moves downward, and the rubber magnetic ring moves with the piston. When it reaches a position that coincides with the low-position magnetic switch, the magnetic switch senses the valve and transmits a signal that the valve is closed, which in turn causes the solenoid valve to cut off the air supply to the cylinder.

[0003] Combined with its instruction manual Figure 2As can be seen, an annular mounting groove is provided on the side of the piston, and the rubber magnetic ring is installed and fixed in the annular groove. The rubber magnetic ring is not a traditional magnet; it is a magnetic composite material with a certain degree of flexibility. This allows the operator to remove the rubber magnetic ring from the mounting groove by its own deformation. Simultaneously, the operator only needs to remove the two magnetic switches from the cylinder to switch the pneumatic baffle valve from electronic control to purely manual control, improving its applicability. However, the magnetism of the rubber magnetic ring is relatively weak; its magnetic force is more suitable for adhering to ferrous surfaces. In other words, while using a rubber magnetic ring allows for detachment from the piston, it prevents a stable and precise fit with the magnetic switches in practical applications. Furthermore, the rubber magnetic ring's performance cannot remain stable over long-term use due to the aging of the rubber material. In summary, this internally heated pneumatic baffle valve improves applicability but cannot guarantee reliability in electronic control mode. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a vacuum baffle valve, which solves the problem of not being able to guarantee reliability under electronic control while improving applicability.

[0005] The objective of this utility model can be achieved through the following technical solutions: A vacuum baffle valve includes a valve body, a cylinder connected to the upper end of the valve body, a valve core disposed within the valve body and driven by the piston rod of the cylinder, and two magnetic switches disposed outside the outer shell of the cylinder. The cylinder's piston is characterized in that it is a circular block shaped like a larger upper part and a smaller lower part, with an annular magnetic block sleeved on the lower outer periphery of the piston. An annular limiting member is detachably connected to the lower part of the piston, and the magnetic block abuts against the limiting member and the upper part of the piston in a vertical direction.

[0006] This vacuum baffle valve features a cylinder piston shaped like a circular block, wider at the top and narrower at the bottom. A ring-shaped magnetic block is fitted around the lower outer circumference of the piston, and a ring-shaped limiting component is detachably connected to the lower part of the piston. Because the upper outer circumference of the piston protrudes beyond the lower part, the magnetic block is vertically positioned between the limiting component and the upper part of the piston. To switch the vacuum baffle valve from electronic control to manual control, the operator simply removes the magnetic switch directly from the cylinder, removes the piston from the cylinder, and then removes the limiting component from the piston to remove the magnetic block. This structure greatly improves the operator's convenience. Furthermore, it means that the magnetic block no longer needs to be flexible to deform during installation or removal. This allows the use of sintered ferrite magnets or neodymium iron boron magnets with better magnetic properties, ensuring the precision of the fit between the magnetic block and the magnetic switch. This improves both applicability and operational reliability in electronic control mode.

[0007] In the aforementioned vacuum baffle valve, the lower outer periphery of the piston is provided with an annular connecting groove, and the limiting member is a snap ring disposed within the annular connecting groove.

[0008] After the magnetic block is fitted onto the lower outer circumference of the piston, the retaining ring is installed in the annular connecting groove. The retaining ring engages with the upper part of the piston to vertically position the magnetic block on the piston. When it is necessary to change the vacuum baffle valve from an electronically controlled structure to a purely manual control, simply use retaining ring pliers to remove the retaining ring from the annular connecting groove, and the magnetic block can be directly removed from the lower part of the piston.

[0009] In the aforementioned vacuum baffle valve, as another technical solution, the lower outer circumference of the piston is provided with threads, and the limiting member is threadedly connected to the lower part of the piston.

[0010] After the magnetic block is fitted onto the lower outer circumference of the piston, the limiting member is threaded onto the lower part of the piston. The limiting member engages with the upper part of the piston to position the magnetic block vertically on the piston. When it is necessary to change the vacuum baffle valve from an electronically controlled structure to a purely manual control, simply unscrew the limiting member from the piston along the threads, and the magnetic block can be removed directly from the lower part of the piston.

[0011] In the aforementioned vacuum baffle valve, the valve core includes a T-shaped support block, an inverted T-shaped valve disc located below the support block, and a bellows fixed between the bottom of the support block and the larger portion of the valve disc. The larger portion of the support block abuts against the upper end of the valve body. The support block has a central hole. The piston rod of the cylinder passes through the support block into the bellows and is fixed to the smaller portion of the valve disc. The outer shell of the cylinder includes a cylinder head and a cylinder body with a lower opening. The cylinder body is fixed to the upper end of the valve body by fasteners. The opening of the cylinder body has a positioning step one. The larger portion of the support block abuts against the positioning step one. The cylinder body has a positioning step two near the opening. The cylinder head is located inside the lower end of the cylinder body and abuts against the positioning step two and the support block in the vertical direction.

[0012] The cylinder body is designed as a cylindrical shape with an open bottom. The cylinder head is installed inside the lower end of the cylinder body and directly fixed to the valve body via fasteners. The cylinder head is positioned vertically against the positioning step two inside the cylinder body and the valve core support block. The valve core support block is also positioned vertically by the positioning step one inside the valve body and cylinder body. Therefore, after removing the fasteners that fix the cylinder body and valve body, and removing the cylinder along with the valve core from the valve body, only the connection between the piston rod of the cylinder and the valve core needs to be released. The cylinder head can then be removed directly from the cylinder body without disassembling it. After that, the piston rod along with the piston can be removed from the cylinder body to remove the magnetic block. This design improves the convenience of switching the vacuum baffle valve from electronic control to purely manual control.

[0013] In the aforementioned vacuum baffle valve, the cylinder head has an annular groove on its outer periphery, and a sealing ring is provided in the annular groove. The sealing ring abuts against the inner peripheral wall of the cylinder body at the second positioning step. The outer peripheral wall of the cylinder head above the annular groove matches the inner peripheral wall of the cylinder body at the second positioning step. The outer diameter of the cylinder head below the annular groove is smaller than the outer diameter of the cylinder head above the annular groove. The cylinder head below the annular groove has an air passage hole. An annular air guide gap is formed between the outer peripheral wall of the cylinder head below the annular groove and the inner peripheral wall of the cylinder body at the second positioning step. The air passage hole is connected to the central hole of the support block. An exhaust hole is provided on the side of the cylinder body. Both the exhaust hole and the air passage hole are connected to the air guide gap.

[0014] Similar to existing systems, this vacuum baffle valve operates by using a piston to move the valve disc up and down via a piston rod, thus opening or closing the internal passages of the valve. Since the support block is positioned vertically, and the bellows is fixedly connected to the support block and valve disc at both ends, the bellows is compressed or extended during the valve disc's up-and-down movement. To ensure smooth compression of the bellows, the air inside must be expelled. Because this vacuum baffle valve places the cylinder head inside the lower end of the cylinder body, an annular groove is first created on the outer circumference of the cylinder head. A sealing ring is installed within this groove, abutting against the inner circumferential wall of the cylinder body at the second positioning step. The portion of the cylinder head's outer circumferential wall above the annular groove mates with the inner circumferential wall of the cylinder body at the second positioning step, forming a structure to prevent air entering the cylinder from leaking outwards between the cylinder body and the cylinder head. Next, the outer diameter of the cylinder head below the annular groove is set to be smaller than the outer diameter of the cylinder head above the annular groove. This creates an annular air guide gap between the outer peripheral wall of the cylinder head below the annular groove and the inner peripheral wall of the cylinder body at the second positioning step. Then, an air passage is provided in the cylinder head below the annular groove, which is connected to the center hole of the support block. An exhaust hole is provided on the side of the cylinder body, and both the exhaust hole and the air passage are connected to the air guide gap. This forms an air passage that ensures the smooth discharge of air inside the bellows. Specifically, during the axial compression of the bellows, the air inside the bellows is discharged sequentially through the air hole, the air guide gap, and the exhaust hole.

[0015] Compared with existing technologies, this vacuum baffle valve uses a cylinder piston in the shape of a circular block that is larger at the top and smaller at the bottom. A ring-shaped magnetic block is fitted onto the lower outer periphery of the piston, and a ring-shaped limiting component is detachably connected to the lower part of the piston to position the magnetic block in the vertical direction. This structure greatly improves the convenience of operation for workers. Moreover, it means that the magnetic block no longer needs to be flexible to deform during installation or removal. This allows the magnetic block to be directly used with sintered ferrite magnets or neodymium iron boron magnets with better magnetic properties, ensuring the matching accuracy between the magnetic block and the magnetic switch. This improves both applicability and the reliability of operation in electronic control mode. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the vacuum baffle valve.

[0017] Figure 2 This is a cross-sectional view of the vacuum baffle valve.

[0018] In the diagram, 1. Valve body; 1a. First air port; 1b. Second air port; 2. Cylinder; 2a. Outer shell; 2b. Piston; 2c. Piston rod; 2d. Cylinder body; 2d1. Mounting groove; 2d2. Vent hole; 2d3. Positioning step one; 2d4. Positioning step two; 2d5. Exhaust port; 2e. Cylinder head; 2e1. Annular groove; 2e2. Air passage hole; 2e3. Cavity; 3. Valve core; 4. Magnetic switch; 4a. Mating part; 5. Magnetic block; 6. Limiting component; 7. Support block; 8. Valve disc; 9. Bellows; 10. Fastener; 11. Sealing ring; 12. Air guide gap; 13. Return spring; 14. Screw. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] Example 1

[0021] like Figure 1 and Figure 2 As shown, the vacuum baffle valve includes a valve body 1 with a first air port 1a at the bottom and a second air port 1b on the side, a cylinder 2 connected to the upper end of the valve body 1, and a valve core 3 disposed within the valve body 1. The cylinder 2 includes a housing 2a, a piston rod 2c disposed within the housing 2a, and a piston 2b fixed to the upper end of the piston rod 2c. The piston rod 2c is connected to the valve core 3. Movement of the piston rod 2c can drive the valve core 3 to open or block the first air port 1a. The housing 2a of the cylinder 2 is provided with two vent holes 2d2, and the piston 2b is located vertically between the two vent holes 2d2. A return spring 13 is also provided inside the housing 2a of the cylinder 2. The two ends of the return spring 13 act on the upper end of the piston 2b and the housing 2a of the cylinder 2, respectively. The outer shell 2a of cylinder 2 is also provided with two vertically elongated mounting grooves 2d1. This vacuum baffle valve also includes two magnetic switches 4. A strip-shaped mating part 4a is provided vertically at the inner end of each magnetic switch 4. The two mating parts 4a are slidably disposed within the two mounting grooves 2d1. A through hole is provided on the mating part 4a along the radial direction of piston 2b. A screw 14 is threaded into the through hole, and the end of the screw 14 is pressed against the groove wall of the mounting groove 2d1 to position the magnetic switch 4. The piston 2b of cylinder 2 is a circular block shaped with a larger upper part and a smaller lower part. A ring-shaped magnetic block 5 is sleeved on the lower outer periphery of piston 2b. A ring-shaped limiting member 6 is detachably connected to the lower part of piston 2b. The magnetic block 5 abuts against the limiting member 6 and the upper part of piston 2b vertically. Specifically, a ring-shaped connecting groove is provided on the lower outer periphery of piston 2b, and the limiting member 6 is a retaining ring disposed within the ring-shaped connecting groove.

[0022] like Figure 2As shown, the valve core 3 has a T-shaped support block 7, an inverted T-shaped valve disc 8 located below the support block 7, and a bellows 9 welded and fixed between the bottom of the support block 7 and the larger portion of the valve disc 8. The larger portion of the support block 7 abuts against the upper end of the valve body 1. The support block 7 has a central hole. The piston rod 2c of the cylinder 2 passes through the support block 7 into the bellows 9 and is fixed to the smaller portion of the valve disc 8. The outer shell 2a of the cylinder 2 includes a cylinder head 2e and a cylinder body 2d with an opening at the lower end. The cylinder body 2d is fixed to the upper end of the valve body 1 by fasteners 10. The opening of the cylinder body 2d has a positioning step 2d3. The larger portion of the support block 7 abuts against the positioning step 2d3. The cylinder body 2d has a positioning step 2d4 near the opening. The cylinder head 2e is located inside the lower end of the cylinder body 2d and abuts against the positioning step 2d4 and the support block 7 in the vertical direction.

[0023] like Figure 2 As shown, the cylinder head 2e has an annular groove 2e1 on its outer periphery. A sealing ring 11 is provided in the annular groove 2e1. The sealing ring 11 abuts against the inner peripheral wall of the cylinder body 2d at the second positioning step 2d4. The outer peripheral wall of the cylinder head 2e above the annular groove 2e1 matches the inner peripheral wall of the cylinder body 2d at the second positioning step 2d4. The outer diameter of the cylinder head 2e below the annular groove 2e1 is smaller than the outer diameter of the cylinder head 2e above the annular groove 2e1. The cylinder head 2e below the annular groove 2e1 is provided with an air passage hole 2e2. An annular air guide gap 12 is formed between the outer peripheral wall of the cylinder head 2e below the annular groove 2e1 and the inner peripheral wall of the cylinder body 2d at the second positioning step 2d4. The air passage hole 2e2 is connected to the center hole of the support block 7. The side of the cylinder body 2d is provided with an exhaust hole 2d5. Both the exhaust hole 2d5 and the air passage hole 2e2 are connected to the air guide gap 12. In this embodiment, the vent 2e2 is located on the side of the cylinder head 2e, and the bottom center area of ​​the cylinder head 2e is provided with a cavity 2e3. The center hole of the support block 7 is located inside the cavity 2e3, and the vent 2e2 is connected to the cavity 2e3.

[0024] In practical use, one magnetic switch 4 is positioned in the high position to correspond to the vacuum baffle valve being fully open, and the other magnetic switch 4 is positioned in the low position to correspond to the vacuum baffle valve being closed. The two vents 2d2 are connected by an air pipe, and the air supply is activated or cut off by a solenoid valve via an air source. The signal lines of both magnetic switches 4 are electrically connected to the solenoid valve. When the vacuum baffle valve is closed, the valve disc 8 of the valve core 3 blocks the first air port 1a, thus cutting off the passage inside the valve body 1. When it is necessary to open the valve, the solenoid valve is controlled to supply air to the lower vent 2d2, so that the piston 2b is pushed upward by the air pressure, thereby causing the piston rod 2c and the valve disc 8 to move upward and open the first air port 1a. After the piston 2b moves upward until the magnet is sensed by the magnetic switch 4 in the high position, a signal is generated, and the solenoid valve cuts off the air supply to the lower vent 2d2. Similarly, when the valve needs to be closed, the solenoid valve supplies air to the upper vent 2d2, which pushes the piston 2b downwards by the air pressure. This causes the piston rod 2c and valve disc 8 to move downwards, blocking the first vent 1a. After the piston 2b moves downwards until the magnet is sensed by the lower magnetic switch 4, a signal is generated, and the solenoid valve cuts off the air supply to the upper vent 2d2.

[0025] When switching this vacuum baffle valve from electronic control to manual control, the operator first removes the magnetic switch 4 from the outer casing 2a of the cylinder 2. Then, the fasteners 10 that secure the cylinder 2d to the valve body 1 are removed, allowing the cylinder 2, along with the valve core 3, to be removed from the valve body 1. Next, the connection between the piston rod 2c of the cylinder 2 and the valve core 3 is released. Since the cylinder head 2e rests vertically between the support block 7 of the valve core 3 and the positioning step 2d4 of the cylinder 2d, after the valve core 3 separates from the piston rod 2c of the cylinder 2, the cylinder head 2e can be removed directly from the cylinder 2d without disassembly. Then, the piston rod 2c, along with the piston 2b, is removed from the cylinder 2d. Finally, the magnet can be removed from the piston 2b simply by removing the retaining ring. Next, simply place the piston 2b along with the piston rod 2c back into the cylinder 2d, put the cylinder head 2e on the piston rod 2c, connect the valve core 3 to the piston rod 2c, and finally install the cylinder 2d along with the valve core 3 onto the valve body 1 to put the vacuum baffle valve into a purely manual control mode.

[0026] Example 2

[0027] This embodiment is basically the same as the first embodiment in terms of structure and principle. The difference is that in this embodiment, the lower outer circumference of the piston 2b is provided with threads, and the limiting member 6 is threadedly connected to the lower part of the piston 2b.

[0028] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A vacuum baffle valve, comprising a valve body (1), a cylinder (2) connected to the upper end of the valve body (1), a valve core (3) disposed within the valve body (1) and driven by the piston rod (2c) of the cylinder (2), and two magnetic switches (4) disposed outside the outer casing (2a) of the cylinder (2), characterized in that, The piston (2b) of the cylinder (2) is a circular block that is larger at the top and smaller at the bottom. A ring-shaped magnetic block (5) is sleeved on the lower outer periphery of the piston (2b). A ring-shaped limiting member (6) is detachably connected to the lower part of the piston (2b). The magnetic block (5) abuts against the upper part of the piston (2b) in the vertical direction.

2. The vacuum baffle valve according to claim 1, characterized in that, The piston (2b) has an annular connecting groove on its lower outer periphery, and the limiting member (6) is a snap ring located in the annular connecting groove.

3. The vacuum baffle valve according to claim 1, characterized in that, The piston (2b) has a thread on its lower outer periphery, and the limiting member (6) is threadedly connected to the lower part of the piston (2b).

4. The vacuum baffle valve according to claim 2 or 3, characterized in that, The valve core (3) includes a T-shaped support block (7), an inverted T-shaped valve disc (8) located below the support block (7), and a bellows (9) fixed between the bottom of the support block (7) and the larger portion of the valve disc (8). The larger portion of the support block (7) abuts against the upper end of the valve body (1). The support block (7) has a central hole. The piston rod (2c) of the cylinder (2) passes through the support block (7) into the bellows (9) and is fixed to the smaller portion of the valve disc (8). The outer shell (2a) of the cylinder (2) includes a cylinder head. (2e) and a cylinder body (2d) with a lower opening cylindrical shape. The cylinder body (2d) is fixed to the upper end of the valve body (1) by fasteners (10). The opening of the cylinder body (2d) has a positioning step one (2d3). The larger part of the support block (7) abuts against the positioning step one (2d3). The cylinder body (2d) has a positioning step two (2d4) near the opening. The cylinder cover (2e) is located inside the lower end of the cylinder body (2d) and the cylinder cover (2e) abuts against the positioning step two (2d4) and the support block (7) in the vertical direction.

5. The vacuum baffle valve according to claim 4, characterized in that, The cylinder head (2e) has an annular groove (2e1) on its outer periphery. A sealing ring (11) is provided in the annular groove (2e1). The sealing ring (11) abuts against the inner peripheral wall of the cylinder body (2d) at the second positioning step (2d4). The outer peripheral wall of the cylinder head (2e) above the annular groove (2e1) matches the inner peripheral wall of the cylinder body (2d) at the second positioning step (2d4). The outer diameter of the cylinder head (2e) below the annular groove (2e1) is smaller than that of the part above the annular groove (2e1). The cylinder head (2e) has an outer diameter and an air passage hole (2e2) below the annular groove (2e1). The outer peripheral wall of the cylinder head (2e) below the annular groove (2e1) and the inner peripheral wall of the cylinder body (2d) at the second positioning step (2d4) form an annular air guide gap (12). The air passage hole (2e2) is connected to the center hole of the support block (7). The side of the cylinder body (2d) has an exhaust hole (2d5). Both the exhaust hole (2d5) and the air passage hole (2e2) are connected to the air guide gap (12).

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