Vacuum valve

Abstract

A valve element hole is formed in the bottom wall of a valve body, a positive pressure air input channel and a negative pressure air input channel are arranged on the front wall of the valve body, and a second branch hole communicated with the valve element hole and a first branch hole communicated with the positive pressure air input channel are formed in the top wall of the valve body. An electromagnetic valve is arranged to control connection or disconnection of the first branch hole and the second branch hole. A valve pipe is arranged in the valve element hole, an inner hole of the valve pipe comprises a second valve pipe hole with the small hole diameter and a third valve pipe hole with the large hole diameter, and the negative pressure air input channel is communicated with the second valve pipe hole through the negative pressure air input hole. And a valve core is arranged in the inner hole of the valve pipe. The valve element comprises a second piston body, a connecting rod is arranged at the bottom of the second piston body, a sealing device is arranged at the bottom of the connecting rod, and a spring is arranged between the sealing device and the plug and pushes the valve element to move upwards, so that the sealing device blocks the second hole of the valve pipe. The right wall of the valve body is provided with a negative pressure air output hole communicated with the third hole of the valve pipe and further provided with a flow adjusting device. The utility model has the advantages of wide adaptability, reduced equipment cost, improved overall efficiency and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vacuum chuck technical field, concretely relates to a vacuum valve. BACKGROUND

[0002] Vacuum chucks are widely used in goods handling devices due to their ability to quickly pick up and release items in industrial production. Most vacuum chucks are usually equipped with a self-contained vacuum generator, but in large factories, due to the variety of items that need to be handled, a vacuum pump is usually used to provide negative pressure air for multiple vacuum chucks. In order to ensure that each chuck can work normally, a vacuum valve is usually installed between the vacuum pump and each chuck to control the connection and disconnection of negative pressure air, thereby achieving the grasping or releasing of goods.

[0003] However, the flow rate of the vacuum valves on the market is usually fixed, lacking flow rate adjustment function. Different goods have different weights and shapes, and the required negative pressure air flow rate is also different. This means that different flow rate vacuum valves need to be configured for each chuck, resulting in more complex system configuration and inability to achieve unified control. Such design not only increases equipment cost, but also reduces system flexibility and overall efficiency. SUMMARY

[0004] Therefore, the utility model provides a kind of vacuum valve, to solve the technical problems such as the increase of equipment cost, the reduction of system flexibility and the decline of overall efficiency caused by the lack of flow rate adjustment function in prior art vacuum valve.

[0005] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0006] A vacuum valve comprises a valve body; a valve core hole is formed in the bottom wall of the valve body; a plug is arranged at the bottom of the valve core hole to seal the bottom of the valve core hole; a positive pressure air inlet channel and a negative pressure air inlet channel are sequentially formed in the front wall of the valve body from top to bottom on the right side of the valve core hole; a second branch hole is formed in the top wall of the valve body from left to right and is in communication with the top of the valve core hole; a first branch hole is formed in the top wall of the valve body from left to right and is in communication with the positive pressure air inlet channel; an electromagnetic valve is arranged on the top wall of the valve body; the first branch hole and the second branch hole are in communication with the electromagnetic valve; the electromagnetic valve is used to connect or disconnect the first branch hole and the second branch hole; a valve pipe is fixedly arranged in the valve core hole; the inner hole of the valve pipe comprises a second valve pipe hole and a third valve pipe hole from top to bottom; the negative pressure air inlet channel is in communication with the second valve pipe hole through a negative pressure air inlet hole; the diameter of the third valve pipe hole is larger than that of the second valve pipe hole; a valve core is arranged in the second valve pipe hole and the third valve pipe hole; the valve core comprises a second piston body which is slidably arranged in the second valve pipe hole; a connecting rod is arranged at the bottom of the second piston body; a sealing device is arranged at the bottom of the connecting rod; the sealing device is arranged in the third valve pipe hole and is used to seal the bottom of the second valve pipe hole; the diameter of the second piston body is matched with the diameter of the second valve pipe hole; the diameter of the connecting rod is smaller than the diameter of the second valve pipe hole; a spring is arranged between the top wall of the plug and the sealing device and is used to push the valve core upward so that the sealing device seals the bottom of the second valve pipe hole; a negative pressure air outlet hole is formed in the right wall of the valve body and is in communication with the third valve pipe hole; a flow adjusting device is further arranged and is used to adjust the flow of the negative pressure air in the negative pressure air outlet hole.

[0007] Optionally, the sealing device comprises a fixed part arranged at the bottom of the connecting rod; a fourth sealing ring is arranged on the outer wall of the fixed part; the outer diameter of the fourth sealing ring is smaller than the diameter of the third valve pipe hole and is larger than the diameter of the second valve pipe hole; the spring is arranged between the bottom wall of the fixed part and the top wall of the plug.

[0008] Preferably, the upper part of the second valve pipe hole is a first valve pipe hole; the diameter of the first valve pipe hole is larger than that of the second valve pipe hole; a first piston body is arranged at the top of the second piston body; the diameter of the first piston body is matched with the diameter of the first valve pipe hole; the first piston body is slidably arranged in the first valve pipe hole.

[0009] Preferably, a first sealing ring is arranged between the top outer wall of the valve pipe and the hole wall of the valve core hole; a second sealing ring is arranged between the outer wall of the valve pipe and the hole wall of the valve core hole in the upper side area of the negative pressure air inlet hole; a third sealing ring is arranged between the outer wall of the valve pipe and the hole wall of the valve core hole in the lower side area of the negative pressure air inlet hole.

[0010] Optionally, the valve pipe and the valve body are in an integrated structure.

[0011] Optionally, the flow regulating device includes an regulating rod; the right wall of the valve body has an regulating rod hole along the axial direction of the negative pressure air inlet hole, which communicates with the negative pressure air inlet channel; the regulating rod is threadedly connected to the regulating rod hole; the regulating rod has an regulating head on the side facing the negative pressure air inlet hole; the regulating head is frustum-shaped, with the diameter of its end face facing the negative pressure air inlet hole being smaller than the diameter of the negative pressure air inlet hole, and its other end face being larger than the diameter of the negative pressure air inlet hole; the regulating head passes through the negative pressure air inlet channel and can extend into the negative pressure air inlet hole.

[0012] Optionally, the flow regulating device includes an regulating column; a through-hole is formed in the bottom wall of the plug; an annular embedding groove is formed in the wall of the regulating column hole; a sliding convex ring adapted to the embedding groove is provided on the outer wall of the regulating column; the diameter of the regulating column is adapted to the diameter of the regulating column hole, and the regulating column is movably disposed in the regulating column hole; the sliding convex ring is embedded in the embedding groove; a sixth sealing ring is provided between the regulating column and the plug on both the upper and lower sides of the sliding convex ring; a blocking ring is provided on the regulating column located above the plug; the outer diameter of the blocking ring is smaller than the diameter of the valve core hole. The valve tube has a bottom wall for sealing the bottom of the valve tube; the bottom of the spring is located on the bottom wall of the valve tube; the bottom of the valve tube is a nested part; the side wall of the nested part has a through-hole for negative pressure air output; the third hole of the valve tube communicates with the negative pressure air output hole through the negative pressure air output hole; the outer diameter of the nested part is adapted to the inner diameter of the shielding ring; the nested part is embedded in the shielding ring; the side wall of the shielding ring has an adjustment hole, rotating the adjustment column changes the size of the overlapping area between the adjustment hole and the negative pressure air output hole of the valve tube, thereby adjusting the negative pressure air flow.

[0013] Optionally, the flow regulating device includes an regulating column; a through regulating column hole is formed in the bottom wall of the plug; an annular embedding groove is formed in the wall of the regulating column hole; a sliding convex ring adapted to the embedding groove is provided on the outer wall of the regulating column; the diameter of the regulating column is adapted to the diameter of the regulating column hole, and the regulating column is movably disposed in the regulating column hole; the sliding convex ring is embedded in the embedding groove; a sixth sealing ring is provided between the regulating column and the plug on both the upper and lower sides of the sliding convex ring; a shielding ring is provided on the regulating column above the plug; the outer diameter of the shielding ring is adapted to the diameter of the valve core hole; the bottom of the spring is located on the top wall of the regulating column; an regulating hole is formed in the side wall of the shielding ring, and rotating the regulating column changes the size of the overlapping area between the regulating hole and the bottom of the negative pressure air output hole, thereby regulating the negative pressure air flow.

[0014] Preferably, the valve body has a first mounting seat on the front side and a second mounting seat on the rear side.

[0015] Preferably, the negative pressure air output hole is provided with a negative pressure air output interface.

[0016] This utility model has at least the following beneficial effects:

[0017] The valve body has a valve core hole on its bottom wall, a positive pressure air input channel and a negative pressure air input channel on its front wall, and a second branch hole communicating with the valve core hole and a first branch hole communicating with the positive pressure air input channel on its top wall. A solenoid valve controls the connection or disconnection of the first and second branch holes. A valve tube is located inside the valve core hole. The valve tube has a second and a third hole. The negative pressure air input channel communicates with the second hole through the negative pressure air input hole. The diameter of the third hole is larger than that of the second hole. A valve core is located inside the valve tube. The valve core includes a second piston body with a connecting rod at its bottom. A sealing device is located at the bottom of the connecting rod. A spring is located between the sealing device and the plug, pushing the valve core upwards to block the second hole of the valve tube. A negative pressure air output hole communicating with the third hole of the valve tube is located on the right wall of the valve body. A flow regulating device is also provided to adjust the flow rate of negative pressure air in the negative pressure air output hole. In use, connect the negative pressure air inlet to the vacuum pump and the positive pressure air inlet to the positive pressure air generator. When the solenoid valve is activated, it connects the first and second branches, allowing positive pressure air to enter the valve core orifice, pushing the valve core downwards. This opens the second valve tube orifice, allowing negative pressure air to flow through the negative pressure air inlet, the second valve tube orifice, and the third valve tube orifice, before exiting through the negative pressure air outlet into the vacuum suction cup to adsorb items. When the solenoid valve closes, it disconnects the first and second branches, causing the valve core to rise under spring tension, sealing the second valve tube orifice and blocking the negative pressure air supply to the vacuum suction cup. Simultaneously, the flow rate of the negative pressure air in the outlet orifice can be adjusted using the flow regulating device to adapt to different on-site needs and the required negative pressure air flow for different items.

[0018] Therefore, the vacuum valve of this utility model has wider adaptability, reduces equipment costs, enhances system flexibility, and improves overall efficiency. Attached Figure Description

[0019] To more clearly illustrate the prior art and the present invention, the accompanying drawings used in the description of the prior art and the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other drawings from the provided drawings without any creative effort.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which this utility model can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0021] Figure 1 This is an assembly state diagram of Embodiment 1 of the vacuum valve of this utility model;

[0022] Figure 2 This utility model relates to a vacuum valve. Figure 1 Top view;

[0023] Figure 3 This utility model relates to a vacuum valve. Figure 2 Sectional view along axis AA;

[0024] Figure 4 This is a schematic diagram of the valve body of Embodiment 1 of the present invention, which is a vacuum valve.

[0025] Figure 5 This utility model relates to a vacuum valve. Figure 4 Top view;

[0026] Figure 6 This utility model relates to a vacuum valve. Figure 5 BB-direction sectional view;

[0027] Figure 7 This is a diagram showing the assembly state of the valve tube and valve core in Embodiment 1 of the present invention for a vacuum valve;

[0028] Figure 8 This utility model relates to a vacuum valve. Figure 7 A frontal sectional view;

[0029] Figure 9 This is a schematic diagram of the adjusting rod in Embodiment 1 of the present invention, which is a vacuum valve.

[0030] Figure 10 This is an assembly state diagram of Embodiment 2 of the vacuum valve of this utility model;

[0031] Figure 11 This utility model relates to a vacuum valve. Figure 10 Top view;

[0032] Figure 12 This utility model relates to a vacuum valve. Figure 11 CC-direction sectional view;

[0033] Figure 13 This is a schematic diagram of the valve body of a vacuum valve according to the present invention;

[0034] Figure 14 This utility model relates to a vacuum valve. Figure 13 Top view;

[0035] Figure 15 This utility model relates to a vacuum valve. Figure 14 DD section view;

[0036] Figure 16 This is a diagram showing the assembly state of the valve tube and valve core in Embodiment 2 of the present invention for a vacuum valve;

[0037] Figure 17 This utility model relates to a vacuum valve. Figure 16 A frontal sectional view;

[0038] Figure 18 This is an assembly diagram of the plug and adjusting ring of Embodiment 2 of the vacuum valve of this utility model;

[0039] Figure 19 This utility model relates to a vacuum valve. Figure 18 A frontal sectional view;

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Valve body; 101. Positive pressure air input channel; 102. First branch hole; 103. Second branch hole; 104. Negative pressure air input channel; 105. Negative pressure air input hole; 106. Negative pressure air output hole; 107. Valve core hole; 108. Adjusting rod hole; 2. Plug; 3. Valve pipe; 301. Valve pipe negative pressure air input hole; 302. Valve pipe negative pressure air output hole; 303. Valve pipe first hole; 304. Valve pipe second hole; 305. Valve pipe third hole; 306. Nested part; 4. Valve core; 40 1. First piston body; 402. Second piston body; 403. Connecting rod; 404. Fixing part; 5. Spring; 6. Solenoid valve; 7. Adjusting rod; 701. Adjusting head; 8. Adjusting column; 801. Covering ring; 802. Sliding convex ring; 803. Adjusting hole; 9. First mounting base; 10. Second mounting base; 11. First sealing ring; 12. Second sealing ring; 13. Third sealing ring; 14. Fourth sealing ring; 15. Negative pressure air output interface; 16. Fifth sealing ring; 17. Sixth sealing ring. Detailed Implementation

[0042] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "comprising," "including," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0044] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to facilitate intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationships in the actual product. Changes in these relative positional relationships, without departing from the technical concept disclosed in this application, should also be considered within the scope of this application.

[0045] Embodiment 1 of the vacuum valve of this utility model:

[0046] like Figures 1 to 9As shown, a valve body 1 is provided, with a valve core hole 107 on the bottom wall of the valve body 1. A plug 2 is provided at the bottom of the valve core hole 107 to seal its bottom. To enhance airtightness, a fifth sealing ring 16 is usually provided between the plug 2 and the wall of the valve core hole 107. From top to bottom, a positive pressure air input channel 101 and a negative pressure air input channel 104 are provided on the front wall of the valve body 1 to the right of the valve core hole 107. The positive pressure air input channel 101 is used to input positive pressure air, and the negative pressure air input channel 104 is used to connect to a vacuum pump to input negative pressure air. From left to right, a second branch hole 103 communicating with the top of the valve core hole 107 and a first branch hole 102 communicating with the positive pressure air input channel 101 are provided on the top wall of the valve body 1. A solenoid valve 6 is provided on the top wall of the valve body 1. Both the first branch hole 102 and the second branch hole 103 are connected to the solenoid valve 6, thus controlling the connection or disconnection of the first branch hole 102 and the second branch hole 103 through the solenoid valve 6. A valve tube 3 is fixedly installed inside the valve core hole 107. The inner holes of the valve tube 3, from top to bottom, are a second valve tube hole 304 and a third valve tube hole 305. The negative pressure air input channel 104 communicates with the second valve tube hole 304 through the negative pressure air input hole 105. Specifically, a negative pressure air input hole 105 communicating with the negative pressure air input channel 104 is opened in the wall of the valve core hole 107. Simultaneously, a through-hole negative pressure air input hole 301 is opened in the valve tube 3 in the area of ​​the second valve tube hole 304. The axis of the negative pressure air input hole 301 coincides with that of the negative pressure air input hole 105. The diameter of the third valve tube hole 305 is larger than the diameter of the second valve tube hole 304. A valve core 4 is installed inside both the second valve tube hole 304 and the third valve tube hole 305. The valve core 4 includes a second piston body 402, the diameter of which is adapted to the diameter of the second hole 304 of the valve tube. It is slidably disposed within the second hole 304 and can be made of rubber. A connecting rod 403 is located at the bottom of the second piston body 402, and a sealing device is located at the bottom of the connecting rod 403. This sealing device is located within the third hole 305 of the valve tube and can be used to block the bottom of the second hole 304. The diameter of the connecting rod 403 is smaller than the diameter of the second hole 304. A spring 5 is provided between the sealing device and the top wall of the plug 2 to push the valve core 4 upwards, causing the sealing device to block the bottom of the second hole 304. Thus, in the initial state, the sealing device, under the tension of the spring 5, seals the second hole 304, keeping the vacuum valve in a closed state. A negative pressure air output hole 106, communicating with the third hole 305 of the valve tube, is opened on the right wall of the valve body 1, through which negative pressure air flows out and is supplied to the vacuum suction cup. It also includes a flow regulating device for regulating the flow rate of negative pressure air in the negative pressure air output port 106. By regulating the flow rate of negative pressure air in the negative pressure air output port 106 through the flow regulating device, the vacuum valve of this application has a wider range of adaptability, reduces equipment costs, enhances system flexibility, and improves overall efficiency.

[0047] Optionally, this application provides a preferred structure for the sealing device, specifically including a fixing part 404 disposed at the bottom of the connecting rod 403. A fourth sealing ring 14 is sleeved on the outer wall of the fixing part 404. The outer diameter of the fourth sealing ring 14 is smaller than the diameter of the third hole 305 of the valve tube and larger than the diameter of the second hole 304 of the valve tube. The spring 5 is located between the bottom wall of the fixing part 404 and the top wall of the plug 2. In this way, the spring 5 pushes the valve core 4 to move upward, pressing the fourth sealing ring 14 tightly against the bottom of the second hole 304 of the valve tube, thus sealing the second hole 304 of the valve tube.

[0048] Preferably, to prevent the valve core 4 from moving beyond its limit when it is lowered under positive pressure air, the upper part of the second hole 304 of the valve tube is the first hole 303 of the valve tube, and the diameter of the first hole 303 is larger than the diameter of the second hole 304 of the valve tube. The top of the second piston body 402 is provided with a first piston body 401, the diameter of the first piston body 401 is adapted to the diameter of the first hole 303 of the valve tube, the first piston body 401 is slidably disposed in the first hole 303 of the valve tube, and the first piston body 401 is also made of rubber.

[0049] Preferably, to seal the valve tube 3 and the valve body 1, a first sealing ring 11 is provided between the top outer wall of the valve tube 3 and the wall of the valve core hole 107. A second sealing ring 12 is provided between the outer wall of the valve tube 3 and the wall of the valve core hole 107 in the area above the negative pressure air inlet hole 105. A third sealing ring 13 is provided between the outer wall of the valve tube 3 and the wall of the valve core hole 107 in the area below the negative pressure air inlet hole 105.

[0050] Optionally, the valve tube 3 is provided in this embodiment for modular production and ease of assembly. In practical applications, the valve tube 3 can be omitted, that is, the valve tube 3 and the valve body 1 are an integral structure.

[0051] Optionally, in this embodiment, the flow regulating device includes an regulating rod 7. An regulating rod hole 108, communicating with the negative pressure air input channel 104, is axially formed on the right wall of the valve body 1 along the negative pressure air input hole 105. The regulating rod 7 is threadedly connected to the regulating rod hole 108. An regulating head 701 is provided on the side of the regulating rod 7 facing the negative pressure air input hole 105. The regulating head 701 is frustoconical and can be made of rubber. The diameter of the end face of the regulating head 701 facing the negative pressure air input hole 105 is smaller than the diameter of the negative pressure air input hole 105, while the diameter of the other end face is larger than the diameter of the negative pressure air input hole 105. The regulating head 701 can extend into the negative pressure air input hole 105 through the negative pressure air input channel 104. By rotating the regulating rod 7, the distance the regulating head 701 extends into the negative pressure air input hole 105 is adjusted, thereby adjusting the negative pressure air flow rate entering the negative pressure air input hole 105, thus affecting the negative pressure air flow rate in the negative pressure air output hole 106.

[0052] Embodiment 2 of the vacuum valve of this utility model:

[0053] This embodiment provides another preferred structure for the flow regulating device based on Embodiment 1, specifically as follows: Figures 10 to 19 As shown, the flow regulating device includes an regulating column 8. A through-hole is formed in the bottom wall of the plug 2, and an annular embedding groove is formed in the wall of the regulating column hole. A sliding convex ring 802, adapted to the embedding groove, is provided on the outer wall of the regulating column 8. The diameter of the regulating column 8 matches the diameter of the regulating column hole, and the regulating column 8 is movably disposed within the regulating column hole, with the sliding convex ring 802 embedded in the embedding groove. To achieve sealing, a sixth sealing ring 17 is provided between the regulating column 8 and the plug 2 on both the upper and lower sides of the sliding convex ring 802. A blocking ring 801 is provided on the regulating column 8 located above the plug 2, and the outer diameter of the blocking ring 801 is smaller than the diameter of the valve core hole 107. The bottom of the valve tube 3 has a bottom wall for sealing the bottom of the valve tube 3, and the bottom of the spring 5 is located on the bottom wall of the valve tube 3. The bottom of the valve tube 3 is a nested portion 306. A through-hole 302 for negative pressure air output is provided on the side wall of the nested portion 306, allowing the third hole 305 of the valve tube to communicate with the negative pressure air output hole 106 via the negative pressure air output hole 302. The outer diameter of the nested portion 306 matches the inner diameter of the shielding ring 801, and the nested portion 306 is embedded within the shielding ring 801. An adjustment hole 803 is provided on the side wall of the shielding ring 801. Rotating the adjusting column 8 changes the area of ​​the overlapping region between the adjusting hole 803 and the negative pressure air output hole 302, thereby adjusting the negative pressure air flow rate.

[0054] Embodiment 3 of the vacuum valve of this utility model:

[0055] Example 2 involves blocking the negative pressure air output port 302 of the valve pipe at the bottom nested part 306 of the valve pipe 3 to regulate flow. However, Example 2 is not applicable when the valve pipe 3 and valve body 1 are an integral structure. Therefore, this example provides another preferred structure for the flow regulating device based on Example 2. It is also applicable to situations where the valve pipe 3 and valve body 1 are an integral structure. The flow regulating device includes an regulating column 8. The bottom wall of the plug 2 has a through regulating column hole. The wall of the regulating column hole has an annular embedding groove. The outer wall of the regulating column 8 has a sliding convex ring 802 that matches the embedding groove. The diameter of the regulating column 8 matches the diameter of the regulating column hole. The regulating column 8 is movably disposed in the regulating column hole, and the sliding convex ring 802 is embedded in the embedding groove. To achieve sealing, a sixth sealing ring 17 is provided between the regulating column 8 and the plug 2 on both the upper and lower sides of the sliding convex ring 802. A shielding ring 801 is provided on the adjusting column 8 located above the plug 2. The outer diameter of the shielding ring 801 is adapted to the diameter of the valve core hole 107. The bottom of the spring 5 is located on the top wall of the adjusting column 8, and an adjusting hole 803 is provided on the side wall of the shielding ring 801. In this way, rotating the adjusting column 8 changes the size of the overlapping area between the adjusting hole 803 and the bottom of the negative pressure air output hole 106, thereby adjusting the negative pressure air flow.

[0056] Typically, the assembly in the aforementioned embodiments also has a first mounting seat 9 on the front side of the valve body 1 and a second mounting seat 10 on the rear side for easy use and installation; at the same time, a negative pressure air output interface 15 is provided at the opening of the negative pressure air output hole 106 for easy connection with a vacuum suction cup.

[0057] The working principle of this application is as follows:

[0058] Connect the negative pressure air inlet to the vacuum pump and the positive pressure air inlet channel to the positive pressure air generator. Rotate the adjusting rod or adjusting column to obtain the negative pressure air flow required for the appropriate vacuum suction cup.

[0059] When adsorbing items, the solenoid valve is activated, connecting the first branch hole and the second branch hole. Positive pressure air enters the valve core hole, pushing the valve core downward. The second hole of the valve tube is opened, and negative pressure air enters the vacuum suction cup through the negative pressure air inlet hole, the second hole of the valve tube, the third hole of the valve tube, and then enters the vacuum suction cup through the negative pressure air outlet hole to adsorb items.

[0060] When the item is released, the solenoid valve closes, disconnecting the first and second branches. The valve core moves upward under spring tension, blocking the second branch of the valve tube and blocking the negative pressure air, thereby cutting off the negative pressure air supply to the vacuum suction cup.

[0061] The present application has been described in a relatively specific and detailed manner above through general descriptions and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the present application.

Claims

1. A vacuum valve, characterized in that, Includes a valve body (1); the bottom wall of the valve body (1) has a valve core hole (107); the bottom of the valve core hole (107) has a plug (2) for sealing its bottom; the front wall of the valve body (1) on the right side of the valve core hole (107) has a positive pressure air input channel (101) and a negative pressure air input channel (104) sequentially formed from top to bottom; the top wall of the valve body (1) has a second branch hole (103) communicating with the top of the valve core hole (107) and a first branch hole (102) communicating with the positive pressure air input channel (101) sequentially formed from left to right; the valve body ( 1) A solenoid valve (6) is provided on the top wall; the first branch hole (102) and the second branch hole (103) are both connected to the solenoid valve (6); the solenoid valve (6) is used to connect or disconnect the first branch hole (102) and the second branch hole (103); a valve tube (3) is fixedly provided in the valve core hole (107); the inner hole of the valve tube (3) is, from top to bottom, the second valve tube hole (304) and the third valve tube hole (305); the negative pressure air input channel (104) is connected to the second valve tube hole (304) through the negative pressure air input hole (105); The diameter of the third hole (305) of the valve tube is larger than the diameter of the second hole (304) of the valve tube; a valve core (4) is provided in the second hole (304) and the third hole (305) of the valve tube; the valve core (4) includes a second piston body (402) slidably disposed in the second hole (304) of the valve tube; a connecting rod (403) is provided at the bottom of the second piston body (402); a sealing device is provided at the bottom of the connecting rod (403); the sealing device is located in the third hole (305) of the valve tube and is used to block the bottom of the second hole (304) of the valve tube; the second piston body (402) The diameter is adapted to the diameter of the second hole (304) of the valve tube; the diameter of the connecting rod (403) is smaller than the diameter of the second hole (304) of the valve tube; a spring (5) is provided between the sealing device and the top wall of the plug (2) to push the valve core (4) upward so that the sealing device blocks the bottom of the second hole (304) of the valve tube; a negative pressure air output hole (106) communicating with the third hole (305) of the valve tube is opened on the right wall of the valve body (1); a flow regulating device is also included to regulate the flow rate of negative pressure air in the negative pressure air output hole (106).

2. A vacuum valve according to claim 1, characterized in that, The sealing device includes a fixing part (404) disposed at the bottom of the connecting rod (403); a fourth sealing ring (14) is sleeved on the outer wall of the fixing part (404); the outer diameter of the fourth sealing ring (14) is smaller than the diameter of the third hole (305) of the valve pipe and larger than the diameter of the second hole (304) of the valve pipe; the spring (5) is located between the bottom wall of the fixing part (404) and the top wall of the plug (2).

3. A vacuum valve according to claim 2, characterized in that, The upper part of the second hole (304) of the valve tube is the first hole (303) of the valve tube; the diameter of the first hole (303) of the valve tube is larger than the diameter of the second hole (304) of the valve tube; the top of the second piston body (402) is provided with a first piston body (401); the diameter of the first piston body (401) is adapted to the diameter of the first hole (303) of the valve tube; the first piston body (401) is slidably disposed in the first hole (303) of the valve tube.

4. A vacuum valve according to claim 3, characterized in that, A first sealing ring (11) is provided between the top outer wall of the valve tube (3) and the wall of the valve core hole (107); a second sealing ring (12) is provided between the outer wall of the valve tube (3) and the wall of the valve core hole (107) in the upper region of the negative pressure air inlet hole (105); a third sealing ring (13) is provided between the outer wall of the valve tube (3) and the wall of the valve core hole (107) in the lower region of the negative pressure air inlet hole (105).

5. A vacuum valve according to claim 3, characterized in that, The valve pipe (3) and the valve body (1) are an integral structure.

6. A vacuum valve according to any one of claims 1 to 5, characterized in that, The flow regulating device includes an regulating rod (7); the right wall of the valve body (1) is provided with an regulating rod hole (108) that communicates with the negative pressure air input channel (104) along the axial direction of the negative pressure air input hole (105); the regulating rod (7) is threadedly connected to the regulating rod hole (108); the regulating rod (7) is provided with an regulating head (701) on the side facing the negative pressure air input hole (105); the regulating head (701) is frustoconical, and the diameter of its end face facing the negative pressure air input hole (105) is smaller than the diameter of the negative pressure air input hole (105), and its other end face is larger than the diameter of the negative pressure air input hole (105); the regulating head (701) can extend into the negative pressure air input hole (105) through the negative pressure air input channel (104).

7. A vacuum valve according to any one of claims 1 to 4, characterized in that, The flow regulating device includes an regulating column (8); the bottom wall of the plug (2) has a through regulating column hole; the wall of the regulating column hole has an annular embedding groove; the outer wall of the regulating column (8) has a sliding convex ring (802) adapted to the embedding groove; the diameter of the regulating column (8) is adapted to the diameter of the regulating column hole, and the regulating column (8) is movably disposed in the regulating column hole; the sliding convex ring (802) is embedded in the embedding groove; a sixth sealing ring (17) is provided between the regulating column (8) and the plug (2) on both the upper and lower sides of the sliding convex ring (802); a shielding ring (801) is provided on the regulating column (8) located above the plug (2); the outer diameter of the shielding ring (801) is smaller than the diameter of the valve core hole (107); the bottom of the valve pipe (3) has a bottom wall. Used to seal the bottom of the valve tube (3); the bottom of the spring (5) is located on the bottom wall of the valve tube (3); the bottom of the valve tube (3) is a nested part (306); the side wall of the nested part (306) is provided with a through valve tube negative pressure air output hole (302); the third hole (305) of the valve tube is connected to the negative pressure air output hole (106) through the valve tube negative pressure air output hole (302); the outer diameter of the nested part (306) is adapted to the inner diameter of the shielding ring (801); the nested part (306) is embedded in the shielding ring (801); the side wall of the shielding ring (801) is provided with an adjustment hole (803), rotating the adjustment column (8) changes the size of the overlapping area between the adjustment hole (803) and the valve tube negative pressure air output hole (302), thereby adjusting the negative pressure air flow rate.

8. A vacuum valve according to any one of claims 1 to 5, characterized in that, The flow regulating device includes an regulating column (8); the bottom wall of the plug (2) has a through regulating column hole; the wall of the regulating column hole has an annular embedding groove; the outer wall of the regulating column (8) has a sliding convex ring (802) adapted to the embedding groove; the diameter of the regulating column (8) is adapted to the diameter of the regulating column hole, and the regulating column (8) is movably disposed in the regulating column hole; the sliding convex ring (802) is embedded in the embedding groove; the regulating column (8) on the upper and lower sides of the sliding convex ring (802) and the plug (2) A sixth sealing ring (17) is provided between each of the two parts; a shielding ring (801) is provided on the adjusting column (8) located above the plug (2); the outer diameter of the shielding ring (801) is adapted to the diameter of the valve core hole (107); the bottom of the spring (5) is located on the top wall of the adjusting column (8); an adjusting hole (803) is opened on the side wall of the shielding ring (801). When the adjusting column (8) is rotated, the area of ​​the overlapping area between the adjusting hole (803) and the bottom of the negative pressure air output hole (106) changes, thereby adjusting the negative pressure air flow rate.

9. A vacuum valve according to claim 1, characterized in that, The valve body (1) has a first mounting seat (9) on the front side and a second mounting seat (10) on the rear side.

10. A vacuum valve according to claim 1, characterized in that, The negative pressure air output hole (106) is provided with a negative pressure air output interface (15).

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