A switching valve for vacuum material extraction

Abstract

The present invention relates to a switching valve for vacuum material extraction, comprising a valve body, a valve seat and a valve core. The interior of the valve body is hollow to form a receiving cavity. The valve body is provided with a first air inlet and an air outlet channel. The first air inlet is connected to a negative pressure air path, and the air outlet channel is connected to a vacuum suction cup. The valve seat is provided with a second air inlet, and the second air inlet is connected to a positive pressure air path. The valve core is elastically slidably arranged in the receiving cavity, and an air flow channel is arranged in the valve core. When the valve core seals the second air inlet in the first position, the negative pressure air path can extract gas through the second air inlet, so that the suction cup generates negative pressure to achieve the purpose of vacuum material extraction; when the valve core is connected to the air outlet channel in the second position, the positive pressure air path can compress the gas into the suction cup through the air outlet channel to complete the blowing, so as to achieve the purpose of rapid material discharge and dust cleaning. The switching valve of the present invention is separately connected to the positive pressure air path and the negative pressure air path, and can switch between the two. The structure is simple and is conducive to the layout of the air path.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical equipment, and in particular to a switching valve for vacuum material extraction. Background Art

[0002] In the processing of electronic equipment, in order to improve the efficiency of picking and placing products, people use vacuum picking to achieve automatic and rapid picking and placing. When used in a dusty environment, it is necessary to switch between positive and negative pressure to clean the dust in the suction cup in time. However, the current switching valve has a complex structure, which is not conducive to the layout of the gas path. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a switching valve for vacuum material extraction.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention provides a switching valve for vacuum material extraction, comprising a valve body, wherein the interior of the valve body is hollow to form an accommodating cavity, the valve body is provided with a first air inlet hole and an air outlet channel communicating with the accommodating cavity, the first air inlet hole is communicated with a negative pressure air path, and the air outlet channel is communicated with a suction cup;

[0006] A valve seat, the valve seat is installed at the lower end of the valve body, the valve seat is provided with a second air inlet hole communicating with the accommodating cavity, and the second air inlet hole is communicated with the positive pressure air path;

[0007] and a valve core, the valve core is elastically slidably disposed in the accommodating cavity between a first position and a second position, and seals the second air inlet hole at the first position, and is communicated with the air outlet channel at the second position, and an air flow channel communicating with the accommodating cavity is disposed in the valve core;

[0008] Wherein, when the valve core seals the second air inlet hole in the first position, the first air inlet hole is connected with the accommodating chamber, the air flow channel and the air outlet channel; when the valve core is connected with the air outlet channel in the second position, the second air inlet hole is connected with the accommodating chamber, the air flow channel and the air outlet channel.

[0009] Furthermore, it also includes an elastic member, which is sleeved on the lower part of the valve core to keep the valve core at the first position to seal the second air inlet hole.

[0010] Furthermore, a first flange is provided on the inner wall of the valve body, a second flange is provided on the valve core near the second air inlet hole, the elastic member is sleeved on the lower part of the valve core, and two ends of the elastic member are respectively in contact with the first flange and the second flange.

[0011] Further, the accommodating chamber includes a first accommodating chamber, a second accommodating chamber and a third accommodating chamber which are arranged in sequence, the valve core is attached to the inner wall of the second accommodating chamber, and the upper and lower ends are respectively accommodated in the first accommodating chamber and the third accommodating chamber, the first air inlet is communicated with the first accommodating chamber, and the air flow channel is communicated with the third accommodating chamber;

[0012] When the valve core is in the first position, the valve core separates the second air inlet hole from the third accommodating chamber, the air flow channel and the air outlet channel. When the valve core is in the second position, the valve core separates the first air inlet hole from the air outlet channel, the air flow channel and the third accommodating chamber.

[0013] Furthermore, it also includes a hollow guide sleeve, and the guide sleeve is outside the valve core and accommodated in the second accommodating chamber.

[0014] Furthermore, the valve core includes a rod portion and a cap portion, the rod portion is used to be inserted into the air outlet channel, the cap portion is used to seal the second air inlet hole, the rod portion is hollow to form the airflow channel, and the side of the rod portion is provided with a plurality of air guide holes connected to the airflow channel.

[0015] Further, the air outlet channel includes a first section and a second section, the aperture of the first section is smaller than the aperture of the second section, a first step is formed between the first section and the second section, and a second step is formed between the second section and the first accommodating cavity;

[0016] The upper end of the rod is provided with an insertion end, the edge contour size of the insertion end is smaller than the edge contour size of the rod, and a third step is formed on the side wall between the insertion end and the rod. When the valve core is in the second position, the insertion end is inserted into the first section and abuts against the first step, and the third step abuts against the second step.

[0017] Furthermore, a first sealing ring is disposed on the outer sleeve of the insertion end, and when the valve core is in the second position, the first sealing ring is sandwiched between the third step and the second step.

[0018] Furthermore, a second sealing ring is sleeved at the connection between the rod portion and the cap portion for sealing the second air inlet hole.

[0019] Further, the valve seat includes a first cylinder and a second cylinder, the edge contour size of the first cylinder is smaller than the edge contour size of the second cylinder, a boss is provided at the connection between the edge contours of the first cylinder and the second cylinder, an abutment platform is provided in the lower side wall of the valve body, the first cylinder is inserted into the bottom opening of the valve body, the boss abuts against the abutment platform, and the second cylinder abuts against the side wall of the valve body.

[0020] The technical solution of the present invention has the following beneficial effects:

[0021] The switching valve of the present invention utilizes the elastic sliding of the valve core in the valve body, so that the valve core seals the second air inlet hole at the first position, so that the negative pressure air path can draw out the gas in the suction cup and the valve body through the second air inlet hole, thereby causing the suction cup to generate negative pressure and achieve the purpose of vacuum material extraction; the valve core is connected to the air outlet channel at the first position, so that the positive pressure air path can compress the gas into the suction cup through the second air inlet hole, the accommodating cavity, the air flow channel and the air outlet channel to complete the blowing, thereby achieving the purpose of rapid material discharge and dust cleaning. The switching valve of the present invention separately connects the positive pressure air path and the negative pressure air path, and can switch between the two. It has a simple structure and is conducive to the layout of the air path. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a disassembly diagram of the present invention;

[0023] Figure 2 is a cross-sectional schematic diagram of the present invention in a first position;

[0024] Figure 3 is a cross-sectional schematic diagram of the present invention in a second position;

[0025] Figure 4 is a cross-sectional schematic diagram of a valve body of the present invention;

[0026] Figure 5 is a cross-sectional schematic diagram of the valve core of the present invention;

[0027] Figure 6 It is a cross-sectional schematic diagram of the valve seat of the present invention.

[0028] Description of reference numerals:

[0029] 100-switching valve, 10-valve body, 11-accommodating chamber, 111-first accommodating chamber, 112-second accommodating chamber, 113-third accommodating chamber, 12-first air inlet hole, 13-air outlet channel, 131-first section, 132-second section, 133-first step, 134-second step, 15-abutting platform, 20-valve seat, 21-second air inlet hole, 22-first cylinder, 23-second cylinder, 24-boss, 30-valve core, 31-air flow channel, 32-second flange, 33-rod, 331-air guide hole, 332-insertion end, 333-third step, 334-first sealing ring, 335-second sealing ring, 34-cap, 40-elastic member, 50-guide sleeve. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, in the present invention, the descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0034] Please refer to Figures 1 to 6 The present invention provides a switching valve 100 for vacuum material extraction, including a valve body 10, wherein the interior of the valve body 10 is hollow to form a receiving chamber 11, and the valve body 10 is provided with a first air inlet hole 12 and an air outlet channel 13 connected to the receiving chamber 11, wherein the first air inlet hole 12 is connected to a negative pressure air path, and the air outlet channel 13 is connected to a suction cup.

[0035] The valve seat 20 is installed at the lower end of the valve body 10 . The valve seat 20 is provided with a second air inlet hole 21 communicating with the accommodating chamber 11 . The second air inlet hole 21 is communicated with the positive pressure air path.

[0036] And a valve core 30, the valve core 30 is elastically slidably arranged in the accommodating chamber 11 between a first position and a second position, and seals the second air inlet 21 at the first position, and is connected with the air outlet channel 13 at the second position. An air flow channel 31 connected to the accommodating chamber 11 is arranged in the valve core 30.

[0037] Among them, when the valve core 30 seals the second air inlet hole 21 in the first position, the first air inlet hole 12 is connected with the accommodating chamber 11, the air flow channel 31 and the air outlet channel 13, and the negative pressure air path can draw out the air in the valve body 10; when the valve core 30 is connected with the air outlet channel 13 in the second position, the other end of the valve core 30 is completely separated from the second air inlet hole 21. At this time, the second air inlet hole 21 is connected with the accommodating chamber 11, the air flow channel 31 and the air outlet channel 13, and the gas in the positive pressure air path can enter the suction cup.

[0038] like Figure 2 As shown, under normal conditions, the valve core 30 seals the second air inlet 21 in the first position. At this time, the negative pressure air path is opened, and the positive pressure air path is closed. The gas inside the valve body 10 is continuously extracted. Since the first air inlet 12 is connected with the accommodating cavity 11, the air flow channel 31 and the air outlet channel 13, the gas is forced to pass only through the air outlet channel 13, so that the suction cup generates negative pressure to achieve the purpose of vacuum material removal.

[0039] like Figure 3 As shown, after the material is taken, the negative pressure air circuit is closed, the positive pressure air circuit is opened, and air enters through the second air inlet hole 21. When the gas pressure at the second air inlet hole 21 is much greater than the gas pressure inside the valve body 10, the valve core 30 is pushed to move and enter the air outlet channel 13. When the lower part of the valve core 30 is completely separated from the second air inlet hole 21, the second air inlet hole 21 is connected with the accommodating chamber 11, the air flow channel 31 and the air outlet channel 13. At this time, the gas enters the suction cup through the second air inlet hole 21, the accommodating chamber 11, the air flow channel 31 and the air outlet channel 13 to complete the blowing, thereby achieving the purpose of quickly discharging the material and cleaning the dust.

[0040] The switching valve 100 of the present invention separately connects the positive pressure gas circuit and the negative pressure gas circuit and can switch between the two. It has a simple structure and is beneficial to the layout of the gas circuit.

[0041] Furthermore, the switching valve 100 further includes an elastic member 40 , which is preferably a spring. The elastic member 40 is sleeved on the lower portion of the valve core 30 to keep the valve core 30 at the first position to seal the second air inlet 21 .

[0042] When taking materials, the negative pressure air circuit continuously extracts the gas inside the valve body 10, so that the pressure inside the valve body 10 becomes smaller. At this time, the pressure at the second air inlet 21 is greater than the pressure inside the valve body 10, so that the valve core 30 is subjected to suction. Due to the existence of the elastic member 40, the elastic force applied to the valve core 30 is greater than the suction, so that the valve core 30 remains in the first position to seal the second air inlet 21, thereby ensuring the normal taking of materials and avoiding gas leakage.

[0043] When the positive pressure air circuit completes blowing, the valve core 30 moves toward the second air inlet hole 21 due to the resetting effect of the elastic member 40, so as to reseal the second air inlet hole 21, which is convenient for the next material taking operation.

[0044] Specifically, a first flange is provided on the inner wall of the valve body 10, a second flange 32 is provided on the valve core 30 near the second air inlet hole 21, the elastic member 40 is sleeved on the lower part of the valve core 30, and the two ends of the elastic member 40 are respectively abutted against the first flange and the second flange 32, so that the elastic member 40 can be stably installed to avoid displacement.

[0045] Please refer to Figure 4 The accommodating chamber 11 includes a first accommodating chamber 111, a second accommodating chamber 112 and a third accommodating chamber 113 which are arranged in sequence. The valve core 30 is attached to the inner wall of the second accommodating chamber 112, and the upper and lower ends are respectively accommodated in the first accommodating chamber 111 and the third accommodating chamber 113. The first air inlet 12 is communicated with the first accommodating chamber 111, and the air flow channel 31 is communicated with the third accommodating chamber 113.

[0046] When the valve core 30 is in the first position, the valve core 30 separates the second air inlet hole 21 from the third accommodating chamber 113, the air flow channel 31 and the air outlet channel 13. When the valve core 30 is in the second position, the valve core 30 separates the first air inlet hole 12 from the air outlet channel 13, the air flow channel 31 and the third accommodating chamber 113, that is, the valve core 30 separates the first accommodating chamber 111 from the third accommodating chamber 113, so that the gas in the positive pressure gas path cannot enter the first accommodating chamber 111, but can only enter the third accommodating chamber 113 through the second air inlet hole 21 and flow through the air flow channel 31 and the air outlet channel 13.

[0047] In this embodiment, the switching valve 100 also includes a hollow guide sleeve 50, which can be made of silicone. The guide sleeve 50 is sleeved on the outside of the valve core 30 and accommodated in the second accommodating chamber 112, playing a guiding role and a sealing effect. When the valve core 30 is connected to the air outlet channel 13 at the second position, the third accommodating chamber 113 and the first accommodating chamber 111 are separated by the valve core 30 and the guide sleeve 50 to prevent gas from leaking from the gap in the guide sleeve 50.

[0048] In this embodiment, the guide sleeve 50 serves as a second flange, and one end of the elastic member abuts against the guide sleeve 50 .

[0049] Please refer to Figure 5The valve core 30 includes a rod portion 33 and a cap portion 34, the rod portion 33 is used to be inserted into the air outlet channel 13, and the cap portion 34 is used to seal the second air inlet hole 21, the rod portion 33 is hollow to form the air flow channel 31, and the side of the rod portion 33 is provided with a plurality of air guide holes 331 connected to the air flow channel 31, and the rod portion 33 is used to be inserted into the air outlet channel 13, so that the air outlet channel 13 is connected to the air flow channel 31 in the rod portion 33, and is connected to the third accommodating chamber 113 through the air guide holes 331.

[0050] Preferably, four air guide holes 331 are provided, which are evenly distributed along the circumference of the rod portion 33 to increase the air intake.

[0051] Please continue to refer to Figure 4 The air outlet channel 13 includes a first section 131 and a second section 132. The aperture of the first section 131 is smaller than the aperture of the second section 132. A first step 133 is formed between the first section 131 and the second section 132. A second step 134 is formed between the second section 132 and the first accommodating cavity 111.

[0052] The upper end of the rod portion 33 is provided with an insertion end 332, and the edge contour size of the insertion end 332 is smaller than the edge contour size of the rod portion 33. The side wall between the insertion end 332 and the rod portion 33 forms a third step 333. When the valve core 30 is in the second position, the insertion end 332 is inserted into the first section 131 and abuts against the first step 133, and the third step 333 abuts against the second step 134, thereby improving the fit between the insertion end 332 and the air outlet channel 13 and improving the sealing effect.

[0053] In this embodiment, a first sealing ring 334 is provided on the outer sleeve of the insertion end 332. When the valve core 30 is in the second position, the first sealing ring 334 is clamped between the third step 333 and the second step 134, thereby preventing gas from leaking from the gap between the air outlet channel 13 and the insertion end 332, thereby improving the sealing effect.

[0054] In this embodiment, a second sealing ring 335 is sleeved at the connection between the rod portion 33 and the cap portion 34 to seal the second air inlet hole 21, thereby improving the sealing effect.

[0055] Please refer to Figure 6The valve seat 20 includes a first cylinder 22 and a second cylinder 23. The edge contour size of the first cylinder 22 is smaller than that of the second cylinder 23. A boss 24 is provided at the connection between the edge contours of the first cylinder 22 and the second cylinder 23. A contact platform 15 is provided in the lower side wall of the valve body 10. The first cylinder 22 is inserted into the bottom opening of the valve body 10, the boss 24 is in contact with the contact platform 15, and the second cylinder 23 is in contact with the side wall of the valve body 10, thereby improving the connection stability and sealing effect of the valve seat 20 and the valve body 10.

[0056] The above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the embodiments here. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A switching valve for vacuum material extraction, characterized in that: The valve body comprises a valve body, wherein the interior of the valve body is hollow to form an accommodating cavity, the valve body is provided with a first air inlet hole and an air outlet channel connected to the accommodating cavity, the first air inlet hole is connected to the negative pressure air path, and the air outlet channel is connected to the suction cup; A valve seat, the valve seat is installed at the lower end of the valve body, the valve seat is provided with a second air inlet hole communicating with the accommodating cavity, and the second air inlet hole is communicated with the positive pressure air path; and a valve core, the valve core is elastically slidably disposed in the accommodating cavity between a first position and a second position, and seals the second air inlet hole at the first position, and is communicated with the air outlet channel at the second position, and an air flow channel communicating with the accommodating cavity is disposed in the valve core; Wherein, when the valve core seals the second air inlet hole in the first position, the first air inlet hole is connected with the accommodating chamber, the air flow channel and the air outlet channel; when the valve core is connected with the air outlet channel in the second position, the second air inlet hole is connected with the accommodating chamber, the air flow channel and the air outlet channel.

2. The switching valve according to claim 1, characterized in that: It also includes an elastic member, which is sleeved on the lower part of the valve core to keep the valve core at the first position to seal the second air inlet hole.

3. The switching valve according to claim 2, characterized in that: The inner wall of the valve body is provided with a first flange, the valve core is provided with a second flange near the second air inlet hole, the elastic member is sleeved on the lower part of the valve core, and the two ends of the elastic member are respectively in contact with the first flange and the second flange.

4. The switching valve according to claim 1, characterized in that: The accommodating chamber comprises a first accommodating chamber, a second accommodating chamber and a third accommodating chamber which are arranged in sequence, the valve core is attached to the inner wall of the second accommodating chamber, and the upper and lower ends are respectively accommodated in the first accommodating chamber and the third accommodating chamber, the first air inlet is communicated with the first accommodating chamber, and the air flow channel is communicated with the third accommodating chamber; When the valve core is in the first position, the valve core separates the second air inlet hole from the third accommodating chamber, the air flow channel and the air outlet channel. When the valve core is in the second position, the valve core separates the first air inlet hole from the air outlet channel, the air flow channel and the third accommodating chamber.

5. The switching valve according to claim 4, characterized in that: It also includes a hollow guide sleeve, which is sleeved outside the valve core and accommodated in the second accommodating chamber.

6. The switching valve according to claim 4, characterized in that: The valve core includes a rod portion and a cap portion, the rod portion is used to be inserted into the air outlet channel, the cap portion is used to seal the second air inlet hole, the rod portion is hollow to form the airflow channel, and the side of the rod portion is provided with a plurality of air guide holes connected to the airflow channel.

7. The switching valve according to claim 6, characterized in that: The air outlet channel comprises a first section and a second section, the aperture of the first section is smaller than the aperture of the second section, a first step is formed between the first section and the second section, and a second step is formed between the second section and the first accommodating cavity; The upper end of the rod is provided with an insertion end, the edge contour size of the insertion end is smaller than the edge contour size of the rod, and a third step is formed on the side wall between the insertion end and the rod. When the valve core is in the second position, the insertion end is inserted into the first section and abuts against the first step, and the third step abuts against the second step.

8. The switching valve according to claim 7, characterized in that: The insertion end outer sleeve is provided with a first sealing ring, and when the valve core is in the second position, the first sealing ring is sandwiched between the third step and the second step.

9. The switching valve according to claim 6, characterized in that: A second sealing ring is sleeved at the connection between the rod portion and the cap portion, for sealing the second air inlet hole.

10. The switching valve according to claim 1, characterized in that: The valve seat includes a first cylinder and a second cylinder, the edge contour size of the first cylinder is smaller than that of the second cylinder, a boss is provided at the connection between the edge contours of the first cylinder and the second cylinder, an abutment platform is provided in the lower side wall of the valve body, the first cylinder is inserted into the bottom opening of the valve body, the boss abuts against the abutment platform, and the second cylinder abuts against the side wall of the valve body.

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