A pneumatic mechanical valve and a negative pressure adsorption system

Abstract

This utility model relates to the field of pneumatic valve technology, specifically a pneumatic mechanical valve and a negative pressure adsorption system. The pneumatic mechanical valve includes a valve body with an air passage extending through it, and a vertical slide rail connecting the air passage within the valve body; a sealing plug slidably disposed within the vertical slide rail to adjust the size of the air passage's flow cross-section; a pressure arm, one end of which is hinged to the valve body, with a pressure column slidably inserted into the valve body between the pressure arm and the sealing plug to press down on the sealing plug and open the air passage's flow cross-section; a first elastic element disposed within the valve body to reset and move the sealing plug to close the air passage; and a locking assembly disposed between the pressure arm and the valve body to lock and fix the pressure arm at a selected rotation angle. By selecting the rotation angle to lock the pressure arm, the downward movement distance of the sealing plug can be adjusted to control the size of the air passage's flow cross-section, resulting in consistent adjustment, high efficiency, and significant potential for widespread application.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic valve technology, specifically to a pneumatic mechanical valve and a negative pressure adsorption system. Background Technology

[0002] In industry, the high-pressure airflow generated by air compressors needs to be reduced to the required pressure before use. In some application scenarios, it is necessary to frequently start and stop the air source to ensure that the air source consumption end meets the production rhythm. Each time it is started, the air pressure needs to be adjusted to be basically the same to ensure the consistency of production quality.

[0003] Patent publication number "CN207034339U" discloses a centralized control valve device, including a valve body. One side of the valve body has an input end, and the other side has an outlet end. A valve seat is provided at the connection between the outlet end and the input end. A top cover is bolted to the top of the valve body. A sealing plug corresponding to the valve seat is installed inside the top cover. A telescopic valve stem is provided on the top of the sealing plug, and a return spring is provided on the outside of the telescopic valve stem. A fixing block is provided on the top of the return spring. The device controls the air passage cross-section by inflating an expansion element with an airbag to adjust the movement of the telescopic valve stem, thereby controlling the air pressure. However, each adjustment requires inflating the airbag, which is inefficient and cannot achieve consistent pressure adjustment. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the aforementioned background technology and provide a pneumatic mechanical valve.

[0005] The technical solution adopted in this utility model is: a pneumatic mechanical valve, comprising, The valve body has an air passage extending through it, and a vertical slide passage connecting the air passage is provided inside the valve body. A sealing plug, which is slidably disposed within the vertical slide channel to adjust the size of the air passage cross section; A pressure arm, one end of which is hinged to the valve body, and a pressure column that slides through the valve body between the pressure arm and the sealing plug, is used to press down the sealing plug to slide open the air passage flow cross-section. The first elastic element is disposed inside the valve body for resetting and moving the sealing plug to close the air passage; A snap-fit ​​assembly is provided between the pressure arm and the valve body to snap and fix the pressure arm at a selectable rotation angle.

[0006] Furthermore, the valve body is provided with a cover plate, and the pressure arm is hinged to the cover plate; the pressure column slides through the cover plate.

[0007] Furthermore, the snap-fit ​​assembly includes a positioning plate on the valve body and a limiting protrusion on the pressure arm. The positioning plate has positioning holes arranged in an arc shape, and the limiting protrusion can be inserted into any positioning hole to snap and fix the pressure arm when the pressure arm rotates.

[0008] Furthermore, the pressure arm is provided with a pressing mechanism and a movable pin. The movable pin is slidably disposed on the pressure arm and forms the limiting protrusion when its end slides out of the pressure arm. The movable end of the pressing mechanism abuts against the movable pin and is used to push the pin end out of the pressure arm by pressing to control the movement of the movable end.

[0009] Furthermore, the pressing mechanism includes a housing, a pressing shaft with one end slidably disposed within the housing, and a second elastic element disposed within the housing to drive the pressing shaft to reset and move upward. The housing is provided with a limiting hole, and a ball is provided between the pressing shaft and the side wall of the housing. The side wall of the pressing shaft is provided with a receiving groove. When the ball abuts against the side wall of the pressing shaft, it slides out of the pressing arm against the end of the moving pin. When it is located in the receiving groove, the end of the moving pin can retract the pressing arm. The receiving groove is on the side of the ball after the pressing shaft is pressed.

[0010] Furthermore, the pressing mechanism also includes a rocker arm with one end rotatably located at the bottom of the housing; a heart-shaped slide is provided on the pressing shaft, and a slider is provided at the other end of the rocker arm. When pressing, the slider slides unidirectionally along the heart-shaped slide and can be suspended at the upper suspension position located at the concave part of the heart and the lower suspension position located at the apex of the heart.

[0011] Furthermore, the heart-shaped slide includes an ascending slide and a descending slide that connects to the ascending slide at both ends; the upper connection point of the outer wall of the heart-shaped slide located at the concave part of the heart is biased towards the ascending slide, and the lower connection point of the inner wall located at the apex of the heart is biased towards the descending slide.

[0012] Furthermore, limiting holes are provided on both sides of the housing, and ball bearings are provided between both sides of the pressing shaft and the housing; receiving grooves are provided on both sides of the pressing shaft; the receiving grooves include arc-shaped grooves that partially fit the ball bearings.

[0013] Furthermore, the pressure arm is provided with an installation groove and a snap-fit ​​sliding groove connecting the installation groove on both sides, and the movable pin is slidably disposed in the snap-fit ​​sliding groove; the pressing mechanism is disposed in the installation groove, and the snap-fit ​​sliding groove is provided with a limiting hole corresponding to the housing; the end of the movable pin is an arc-shaped structure; the valve body is provided with two opposing positioning plates, and the two positioning plates are provided with a plurality of positioning snap holes.

[0014] Furthermore, the tops of the two positioning plates are open.

[0015] Furthermore, the pressure column is provided with two sealing plugs that are opposite each other, and an air gap is formed between the two sealing plugs; a sealing ring is fitted on the pressure column to seal the pressure column and the valve body.

[0016] Furthermore, it includes an air compressor, a filter pressure reducing valve connected in sequence by pipelines, a pneumatic mechanical valve provided by this utility model, a vacuum generator, and a suction cup connected to the vacuum generator by pipelines; the vacuum generator generates negative pressure using the air source delivered by the air compressor as power.

[0017] Furthermore, the vacuum generator is connected to a gas distribution manifold, which includes an air inlet and multiple air outlets, each of which is connected to the suction cup via a pipe.

[0018] The beneficial effects of this utility model include: 1. The sealing plug is moved by pressing down the pressure arm and the pressure column. After the sealing plug moves in the vertical slide, the air passage is opened. The air pressure is adjusted by controlling the angle of the pressure arm's downward rotation to control the size of the air passage cross section. The locking component locks the pressure arm in place at the required angle to ensure consistent air pressure adjustment each time. After the locking effect is released, the sealing plug resets under the action of the first elastic element and moves to seal the air passage to stop the air passage. It is convenient to use and has high control efficiency. 2. The limiting protrusion on the pressure arm can be inserted into any of the positioning holes arranged in an arc on the positioning plate when rotating, so as to provide multiple gear selections while achieving the ability to lock the pressure arm, meet the different levels of air pressure adjustment, and improve versatility; 3. The moving end of the pressing mechanism abuts against the moving pin, and the moving pin can slide so that its end protrudes from the pressing arm. It can be used to lock into the positioning hole, making it easy to control and use. 4. The ball bearings between the pressing shaft and the housing can be partially located in the receiving groove after the pressing shaft is pressed, allowing the moving pin to retract. Under the force of the second elastic element, the pressing shaft is reset and moved upward, causing one side of the ball bearings to abut against the side wall of the pressing shaft, and the other side to abut against the moving pin through the limiting hole, so that the moving pin extends out of the end face of the pressing arm. That is, the moving pin can retract after pressing, and when not pressed, the moving pin is limited so that its end protrudes out of the pressing arm, making it convenient to use. 5. Press the heart-shaped slide on the shaft, and rotate the rocker arm located at the bottom of the housing. When pressed once, the top of the rocker arm rises around the heart-shaped slide to the heart-shaped recess, and the receiving groove is located on one side of the ball. The ball is embedded in the receiving groove and the moving pin can be retracted. When pressed again, the top of the rocker arm descends around the star-shaped slide to the heart tip, and the side wall of the pressing shaft abuts against the ball to limit the moving pin, which can realize the sliding and retracted state of the moving pin. 6. The upper connection point of the outer wall of the heart-shaped slide is located at the concave part of the heart and is biased towards the rising slide side, while the lower connection point of the inner wall is located at the apex of the heart and is biased towards the descending slide side, which facilitates the one-way circular sliding of the top of the swing arm each time it is pressed. 7. Limiting holes, ball bearings, and receiving grooves are all located on both sides, which can be used to move two moving pins to improve the stability of the locking effect; the arc-shaped groove facilitates the smooth sliding in and out of the ball bearings, avoiding jamming. 8. The two positioning plates and their multiple positioning holes, which are set opposite to each other, engage with the two moving pins on the pressure arm, which can improve the engagement and fixing effect; and prevent the pressure arm from shifting to one side and becoming unstable when engaging on one side under the force of the first elastic element. 9. A better sealing effect can be achieved by using two sealing plugs, one above and one below; 10. The negative pressure adsorption system provided by this utility model generates high-pressure gas through an air compressor. After the high-pressure gas is filtered for impurities and initially depressurized by a filter and pressure reducing valve, it is selectively pressure-regulated by a pneumatic mechanical valve. The vacuum generator uses the pressure-regulated high-pressure gas as power to generate negative pressure. The suction cups connected through pipelines can adsorb and move other devices. It can be frequently started and stopped to adapt to the production cycle. The negative pressure generated by the vacuum generator can be controlled by adjusting the high pressure. It is suitable for adsorbing different kinds of objects and is easy to use.

[0019] The pneumatic mechanical valve of this utility model controls the distance the sealing plug slides down in the vertical slide by rotating the angle of the pressure arm to press down the sealing plug, thereby adjusting the size of the flow cross section of the air passage. The pressure arm can be fixed by selecting the rotation angle through the snap-fit ​​component, which can achieve consistent air pressure adjustment. The sealing plug can be reset and moved by the first elastic element to close the air passage. It is easy to use and has great promotional value. Attached Figure Description

[0020] Figure 1 Schematic diagram of a pneumatic mechanical valve; Figure 2 A schematic diagram of the structure of an embodiment of the pressing mechanism in the state of the movable pin being removed; Figure 3 A schematic diagram of the retracted moving pin state of one embodiment of the pressing mechanism; Figure 4 : A schematic diagram of another embodiment of the pressing mechanism in the state of the movable pin being removed; Figure 5 : A schematic diagram of another embodiment of the pressing mechanism in the retracted moving pin state; Figure 6 : Schematic diagram of the structure of the movable pin-type connecting pressure plate; Figure 7 : A schematic diagram showing the separation of the movable pin from the pressing plate; Figure 8 : A schematic diagram of the structure of one embodiment of the receiving groove; Figure 9 A simplified diagram of a negative pressure adsorption system; Wherein: 10-Pneumatic mechanical valve; 1-Valve body; 11-Air passage; 12-Vertical slide; 13-Pressure column; 14-First elastic element; 15-Positioning plate; 151-Positioning hole; 16-Cover plate; 2-Sealing plug; 21-Sealing ring; 3-Pressure arm; 31-Moving pin; 32-Limiting protrusion; 4-Pressing mechanism; 41-Housing shell; 411-Limiting hole; 42-Pressing shaft; 420-Pressing cap; 421-Accommodation groove; 422-Rising slide; 423-Upper connection point; 424-Descending slide; 425-Lower connection point; 43-Second elastic element; 44-Ball; 45-Swing rod; 5-Air compressor; 6-Filter pressure reducing valve; 7-Vacuum generator; 8-Air distributor; 9-Suction cup. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary. The drawings are not drawn to scale and are intended to explain this utility model, and should not be construed as limiting this utility model.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] After the mass production of resistor sheets is completed, they need to be removed in batches. To improve production efficiency, this invention utilizes a negative pressure adsorption system. Multiple suction cups 9 are used to adsorb and transfer resistor sheets in batches. Frequent starting and stopping of the negative pressure is necessary to ensure that the resistor sheets are released after adsorption and transfer, and to maintain the negative pressure so that the adsorption force of the suction cups 9 on the resistor sheets remains within a suitable range to prevent deformation. The negative pressure adsorption system uses a vacuum generator 7 to generate negative pressure; the generation and magnitude of the negative pressure can be adjusted by regulating the supply of compressed air from its power source.

[0024] This utility model relates to a pneumatic mechanical valve for selecting and regulating the size of the flow cross-section of the air passage 11, facilitating each adjustment and ensuring consistent air pressure. The pressure arm 3 presses down on the pressure column 13, moving the sealing plug 2. After the sealing plug 2 moves within the vertical slide 12, the air passage 11 is opened. The air pressure is regulated by controlling the angle of the downward rotation of the pressure arm 3, which controls the size of the flow cross-section of the air passage 11. A locking assembly selectively locks and fixes the pressure arm 3 at the required angle, ensuring consistent air pressure adjustment each time. After releasing the locking mechanism, the sealing plug 2, under the action of the first elastic element 14, resets and moves, sealing the air passage 11 and stopping the airflow. This design is convenient to use and offers high regulation efficiency.

[0025] A pneumatic mechanical valve, such as Figure 1-7As shown, the valve includes a valve body 1, a sealing plug 2, a pressure arm 3, a first elastic element 14, and a snap-fit ​​assembly. An air passage 11 is provided on the valve body 1, and a vertical slide 12 communicating with the air passage 11 is provided inside the valve body 1. The sealing plug 2 is slidably disposed within the vertical slide 12 to adjust the flow cross-section of the air passage 11. One end of the pressure arm 3 is hinged to the valve body 1, and a pressure column 13, which slides through the valve body 1, is provided between the pressure arm 3 and the sealing plug 2 to press down the sealing plug 2 to open the flow cross-section of the air passage 11. The first elastic element 14 is disposed inside the valve body 1 to reset and move the sealing plug 2 to close the air passage 11. The snap-fit ​​assembly is disposed between the pressure arm 3 and the valve body 1 to snap and fix the pressure arm 3 at a selectable rotation angle.

[0026] like Figure 1 As shown, the sealing plug 2 is initially located in the vertical slide 12 to seal the air passage 11. The first elastic element 14 is preferably a spring located in the vertical slide 12, with both ends abutting against the sealing plug 2 and the valve body 1. Under the elastic force of the first elastic element 14, the sealing plug 2 is located in the vertical slide 12 to seal the air passage 11. After the pressure arm 3 is pressed down, the sealing plug 2 moves down in the vertical slide 12 and compresses the first elastic element 14 to open the air passage 11. The larger the downward angle of the pressure arm 3, the larger the flow cross section of the open air passage 11.

[0027] like Figure 1 As shown, a cover plate 16 is provided on the valve body 1, and one end of the pressure arm 3 is hinged to the cover plate 16; the pressure column 13 slides through the cover plate 16. The pressure column 13 and the pressure arm 3 can be in abutting relationship, and the pressure arm 3 can be separated from the pressure column 13 after rotating and rising. In addition, a limiting block is provided in the vertical slide 12 above the sealing plug 2. When the sealing plug 2 abuts against the limiting block under the thrust of the first elastic member 14, it seals the air passage 11.

[0028] In one embodiment, such as Figure 1 As shown, the snap-fit ​​assembly includes a positioning plate 15 on the valve body 1 and a limiting protrusion 32 on the pressure arm 3. The positioning plate 15 has positioning holes 151 arranged in an arc shape. When the pressure arm 3 rotates, the limiting protrusion 32 can be inserted into any of the positioning holes 151 to snap and fix the pressure arm 3. Preferably, the positioning plate 15 is provided with an arc-shaped slide, and multiple positioning holes 151 are provided in the arc-shaped slide.

[0029] In a further embodiment, such as Figure 1 As shown, the pressure arm 3 is provided with a pressing mechanism 4 and a movable pin 31. The movable pin 31 is slidably disposed on the pressure arm 3 and forms a limiting protrusion 32 when its end slides out of the pressure arm 3. The movable end of the pressing mechanism 4 abuts against the movable pin 31 and is used to push the pin end out of the pressure arm 3 by pressing to control the movement of the movable end.

[0030] Preferably, the end of the movable pin 31 that slides out of the pressure arm 3 has an arc-shaped structure, which makes it easier for the positioning plate 15 to abut against the arc-shaped end of the movable pin 31 when the pressure arm 3 is rotated, so that the movable pin 31 retracts into the pressure arm 3.

[0031] Based on the fact that the pressure arm 3 is equipped with a pressing mechanism 4 and a moving pin 31, such as Figure 2-3 As shown, the pressing mechanism 4 includes a housing 41, a pressing shaft 42 slidably disposed within the housing 41 at one end, and a second elastic element 43 disposed within the housing 41 to drive the pressing shaft 42 to reset and move upward. The housing 41 is provided with a limiting hole 411. A ball bearing 44 is provided between the pressing shaft 42 and the side wall of the housing 41. The side wall of the pressing shaft 42 is provided with a receiving groove 421. When the ball bearing 44 abuts against the side wall of the pressing shaft 42, it abuts against the end of the moving pin 31 and slides out of the pressing arm 3. When it is located within the receiving groove 421, the end of the moving pin 31 can retract the pressing arm 3. The receiving groove 421 corresponds to the side of the ball bearing 44 after the pressing shaft 42 is pressed. The other end of the pressing shaft 42 is provided with a pressing cap 420. The second elastic element 43 is preferably a spring disposed within the housing 41, with both ends abutting against the pressing shaft 42 and the housing 41. The inner diameter of the limiting hole 411 is preferably smaller than the diameter of the ball bearing 44. Under the force of the second elastic element 43, the side wall of the pressing shaft 42 abuts against one side of the ball 44, and the other side of the ball 44 abuts against the moving pin 31, causing the end of the moving pin 31 to protrude outside the pressing arm 3. After the pressing shaft 42 is pressed, the ball 44 can be partially located in the receiving groove 421, allowing the moving pin 31 to retract. Under the force of the second elastic element 43, the pressing shaft 42 is reset and moved upward, causing one side of the ball 44 to abut against the side wall of the pressing shaft 42, and the other side to abut against the moving pin 31 beyond the limiting hole 411, causing the moving pin 31 to extend out of the end face of the pressing arm 3. That is, after pressing, the moving pin 31 can retract, and when not pressed, the moving pin 31 is limited so that its end protrudes out of the pressing arm 3, making it convenient to use.

[0032] In a further embodiment, such as Figure 4-5 As shown, the pressing mechanism 4 also includes a rocker arm 45 rotatably mounted at the bottom of the housing 41 at one end; a heart-shaped slide is provided on the pressing shaft 42, and a slider is provided at the other end of the rocker arm 45. The slider slides unidirectionally along the heart-shaped slide during pressing, and can be suspended at the upper suspension position located at the concave part of the heart and the lower suspension position located at the apex of the heart. The bottom end of the rocker arm 45 can be hinged to the housing 41. The bottom end of the rocker arm 45 is rotatably mounted on the housing 41, and the top end slides unidirectionally within the heart-shaped slide. During a single press, the top end of the rocker arm 45 rises around the heart-shaped slide to the concave part of the heart, and the receiving groove 421 is located on one side of the ball 44. The ball 44 is embedded in the receiving groove 421 and the movable pin 31 can be retracted. During another press, the top end of the rocker arm 45 descends around the star-shaped slide to the apex of the heart, and the side wall of the pressing shaft 42 abuts against the ball 44 to limit the movable pin 31, so that the movable pin 31 can be maintained in the sliding out and retracted state.

[0033] Based on the heart-shaped slide rail on the pressing shaft 42, such as Figure 4As shown, the heart-shaped slide includes an ascending slide 422 and a descending slide 424 connected to the ascending slide at both ends; the upper connection point 423 of the outer wall of the heart-shaped slide, located at the concave part of the heart (the low concave part at the top of the heart), is biased towards the ascending slide 422, and the lower connection point 425 of the inner wall, located at the apex of the heart, is biased towards the descending slide 424, so that the top of the swing rod 45 can slide in one direction in a circular motion each time it is pressed.

[0034] In some embodiments, such as Figure 2-5 As shown, the housing 41 has limiting holes 411 on both sides, and the pressing shaft 42 has balls 44 between its two sides and the housing 41; the pressing shaft 42 has receiving grooves 421 on both sides; the receiving grooves 421 include arc-shaped grooves that partially fit the balls 44. The limiting holes 411, balls 44 and receiving grooves 421 are all located on both sides, which can cooperate to move the two moving pins 31 to improve the stability of the locking effect; the arc-shaped grooves facilitate the smooth sliding in and out of the balls 44 and prevent jamming.

[0035] like Figure 8 As shown, the receiving groove 421 preferably has a wedge-shaped bottom surface, such as a trapezoidal groove, so that when the pressing shaft 42 moves upward, it can move towards the moving pin 31 by abutting the moving ball 44 through the wedge-shaped surface and passing into the limiting groove.

[0036] Based on the fact that both sides of the housing 41 are provided with limiting holes 411, such as Figure 6-7 As shown, the pressure arm 3 is provided with a mounting groove and a snap-fit ​​sliding groove connecting the mounting groove on both sides. The movable pin 31 is slidably disposed in the snap-fit ​​sliding groove. The pressing mechanism 4 is disposed in the mounting groove, and the snap-fit ​​sliding groove is provided with the limiting hole 411 corresponding to the housing 41. The end of the movable pin 31 has an arc-shaped structure. The valve body 1 is provided with two opposing positioning plates 15, and the two positioning plates 15 are provided with multiple positioning snap-fit ​​holes 151. The two positioning plates 15 cooperate to snap-fit ​​the ends of the movable pins 31 on both sides of the pressure arm 3, which can improve the snap-fit ​​fixing effect; and avoid the pressure arm 3 from being tilted to the side and not being snapped firmly when snapped on one side under the action of the first elastic element 14.

[0037] Preferably, the tops of the two positioning plates 15 are open, which serves as a guide for the pressure arm 3 to enter, making it easier for the pressure arm 3 to press down and enter between the two positioning plates 15.

[0038] In one embodiment, such as Figure 1 As shown, the pressure column 13 is provided with two sealing plugs 2 facing each other, forming an air gap between the two sealing plugs 2; a sealing ring 21 is fitted on the pressure column 13 to seal the pressure column 13 and the valve body 1. Preferably, the sealing ring 21 is located on the upper and lower sides of each sealing plug 2 to provide a better sealing effect and is suitable for higher pressure operations.

[0039] The working principle of the pneumatic mechanical valve 10 is as follows: When the pressing shaft 42 is pressed, the bottom end of the rocker arm 45 rotates around the housing 41, and the top end slides into the rising slide 422. When the pressing shaft 42 is released, under the elastic force of the second elastic element 43, the slider at the top of the rocker arm 45 falls into the upper suspension point of the concave cavity. The pressing shaft 42 moves down to the side of the receiving groove 421 corresponding to the ball 44, which can release the locking effect. The pressure arm 3 is lifted, and under the pushing force of the positioning plate 15 on the end of the moving pin 31, the moving pin 31 moves. The ball 44 retracts and enters the receiving groove 421. When the pressing shaft 42 is pressed down again, the second elastic element 43 pushes the pressing shaft 42 upward. The slider at the top of the rocker arm 45 slides along the descending slide 424 to the lower suspension point at the tip. At this time, the receiving groove 421 moves upward, the side wall of the pressing shaft 42 abuts against one side of the ball 44, and the other side of the ball 44 abuts against the moving pin 31 to limit the movement, so that the end of the moving pin 31 protrudes from the pressing arm 3 and is inserted into the positioning hole 151 to achieve the locking and fixing.

[0040] Another aspect of this invention also provides a negative pressure adsorption system, such as... Figure 9 As shown, the system includes an air compressor 5 for generating compressed air, a filter pressure reducing valve 6 connected in sequence by pipelines, the aforementioned pneumatic mechanical valve 10, a vacuum generator 7, and a suction cup 9 connected to the vacuum generator 7 by pipelines; the vacuum generator 7 generates negative pressure using the air source supplied by the air compressor 5 as power; the filter pressure reducing valve 6 is used to filter impurities in the compressed air and perform preliminary pressure reduction, and the pneumatic mechanical valve 10 regulates the pressure of the compressed air to regulate the magnitude of the negative pressure generated by the vacuum generator 7.

[0041] Preferably, such as Figure 9 As shown, the vacuum generator 7 is connected to a gas distribution manifold 8, which includes an air inlet and multiple air outlets, each of which is connected to a suction cup 9 via a pipe.

[0042] The negative pressure suction system of this utility model generates high-pressure gas through an air compressor 5. After the filter and pressure reducing valve 6 filters impurities and initially reduces the pressure of the high-pressure gas, the vacuum generator 7 generates negative pressure by using the pressure-reducing high-pressure gas as power after selective pressure adjustment by a pneumatic mechanical valve. The suction cup 9 is connected through a pipeline to adsorb and move other devices. The pneumatic mechanical valve 10 can be frequently started and stopped to adapt to the production cycle. The negative pressure generated by the vacuum generator 7 can be controlled by adjusting the high pressure. It is suitable for adsorbing different kinds of objects and is easy to use.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pneumatic mechanical valve, characterized in that: include, The valve body (1) has an air passage (11) passing through it, and a vertical slide (12) connecting the air passage (11) is provided inside the valve body (1). A sealing plug (2) is slidably disposed in the vertical slide (12) to adjust the size of the flow cross section of the air passage (11); Pressure arm (3), one end of the pressure arm (3) is hinged to the valve body (1), and a pressure column (13) that slides through the valve body (1) is provided between the pressure arm (3) and the sealing plug (2) for pressing down the sealing plug (2) to slide open the air passage (11) flow cross section size; The first elastic element (14) is provided in the valve body (1) for resetting the movable sealing plug (2) to close the air passage (11). A snap-fit ​​assembly is provided between the pressure arm (3) and the valve body (1) for snapping and fixing the pressure arm (3) at a selected rotation angle.

2. The pneumatic mechanical valve as described in claim 1, characterized in that: The snap-fit ​​assembly includes a positioning plate (15) on the valve body (1) and a limiting protrusion (32) on the pressure arm (3). The positioning plate (15) has positioning holes (151) arranged in an arc shape. When the pressure arm (3) rotates, the limiting protrusion (32) can be inserted into any positioning hole (151) to snap and fix the pressure arm (3).

3. A pneumatic mechanical valve as described in claim 2, characterized in that: The pressure arm (3) is provided with a pressing mechanism (4) and a moving pin (31). The moving pin (31) is slidably disposed on the pressure arm (3) and when its end slides out of the pressure arm (3), it forms the limiting protrusion (32). The moving end of the pressing mechanism (4) abuts against the moving pin (31) and is used to push the pin end out of the pressure arm (3) by pressing to control the movement of the moving end.

4. A pneumatic mechanical valve as described in claim 3, characterized in that: The pressing mechanism (4) includes a housing (41), a pressing shaft (42) with one end slidably disposed in the housing (41), and a second elastic element (43) disposed in the housing (41) to drive the pressing shaft (42) to reset and move upward. The housing (41) is provided with a limiting hole (411). A ball (44) is provided between the pressing shaft (42) and the side wall of the housing (41). The side wall of the pressing shaft (42) is provided with a receiving groove (421). When the ball (44) abuts against the side wall of the pressing shaft (42), it abuts against the end of the moving pin (31) and slides out of the pressing arm (3). When it is located in the receiving groove (421), the end of the moving pin (31) can retract the pressing arm (3). The receiving groove (421) is on the side corresponding to the ball (44) after the pressing shaft (42) is pressed.

5. A pneumatic mechanical valve as described in claim 4, characterized in that: The pressing mechanism (4) also includes a rocker arm (45) with one end rotatably located at the bottom of the housing (41); a heart-shaped slide is provided on the pressing shaft (42), and a slider is provided at the other end of the rocker arm (45). When pressing, the slider slides unidirectionally along the heart-shaped slide and can be suspended at the upper suspension position located at the concave part of the heart and the lower suspension position located at the apex of the heart.

6. A pneumatic mechanical valve as described in claim 5, characterized in that: The heart-shaped slide includes an ascending slide (422) and a descending slide (424) connected to the ascending slide at both ends; the upper connection point (423) of the outer wall of the heart-shaped slide located at the concave part of the heart is biased towards the ascending slide (422), and the lower connection point (425) of the inner wall located at the apex of the heart is biased towards the descending slide (424).

7. A pneumatic mechanical valve as described in claim 4, 5, or 6, characterized in that: The housing (41) is provided with limiting holes (411) on both sides, and ball bearings (44) are provided between the pressing shaft (42) and the housing (41) on both sides; the pressing shaft (42) is provided with receiving grooves (421) on both sides; the receiving grooves (421) include trapezoidal grooves that partially fit the ball bearings (44).

8. A pneumatic mechanical valve as described in claim 7, characterized in that: The pressure arm (3) is provided with an installation groove and a snap-fit ​​sliding groove that connects the installation groove on both sides. The movable pin (31) is slidably disposed in the snap-fit ​​sliding groove. The pressing mechanism (4) is disposed in the installation groove. The snap-fit ​​sliding groove is provided with the limiting hole (411) of the housing (41). The end of the movable pin (31) is an arc-shaped structure. The valve body (1) is provided with two opposing positioning plates (15). The two positioning plates (15) are provided with a plurality of positioning snap holes (151).

9. A pneumatic mechanical valve as described in claim 1, characterized in that: The pressure column (13) is provided with two sealing plugs (2) facing each other, and an air gap is formed between the two sealing plugs (2); a sealing ring (21) is fitted on the pressure column (13) to seal the pressure column (13) and the valve body (1).

10. A negative pressure adsorption system, characterized in that: It includes an air compressor (5), a filter pressure reducing valve (6) connected in sequence by pipelines, a pneumatic mechanical valve (10) as described in any one of claims 1-9, a vacuum generator (7), and a suction cup (9) connected to the vacuum generator (7) by pipelines; the vacuum generator (7) generates negative pressure using the air source delivered by the air compressor (5) as power.

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