A pneumatic multi-channel anti-jamming valve slide valve and its working method

Abstract

This invention discloses a pneumatic multi-channel anti-jamming spool valve and its operating method. In this invention, valve body 1 has valve body 2 detachably fixed on both sides, and valve body 3 detachably fixed at the lower end. Two glue inlets on valve body 1 are connected to two through holes 1 via two glue inlet channels. Two glue outlets 1 on valve body 2 are connected to two through holes 1 via two glue outlet channels 1. Two right-angle channels on valve body 3 are connected to two through holes 1 via two glue outlet channels 2. A cylinder seat is detachably fixed to the outer side of each valve body 2. The cylinder chambers on the two cylinder chambers are connected via two valve channels. Two valve stems and guide sleeves within the two valve channels respectively form sliding pairs, and a plug sleeve is fitted onto the inner end of each valve stem at the corresponding guide sleeve. This invention prevents valve jamming by using a specially designed plug sleeve instead of a traditional sealing ring, and reduces hydraulic shock generated in the flow path when the valve stem switches positions by designing the glue flow paths within each valve body to be perpendicular to each other.

Description

Technical Field

[0001] This invention belongs to the field of electronic product packaging, specifically relating to a pneumatic multi-channel anti-jamming valve slide valve and its working method. Background Technology

[0002] In the field of electronic product packaging, filler adhesives play a role in filling the gaps between electronic chips and protecting the chips. As the requirements for the performance of filler adhesives continue to increase, adhesives containing hard particles are more widely used due to their superior heat resistance, which in turn creates higher requirements for the supply stability of adhesive spraying equipment.

[0003] Currently, glue supply valves for glue spraying equipment include ball valves, needle valves, suction valves, and slide valves. Among them, ball valves are prone to wear, and needle valves and suction valves generate hydraulic shocks when switching working pipelines, causing the filler glue to fail to meet the requirements for uniformity. Slide valves, due to their durability and relatively small hydraulic shocks, have become the mainstream control valve for glue supply equipment today.

[0004] However, conventional spool valves are prone to jamming under conditions involving hard particle adhesives. There are two main reasons for this: one is that during the movement of the spool valve, hard particles or objects contained in the functional packing collide with the valve core, guide sleeve, and pipe wall, generating fine particles that accumulate in the O-ring sealing gap. The seal becomes filled with these fine particles, or the packing adhesive solidifies due to a drop in temperature, causing the spool valve to jam. The other reason is that hard particles or objects contained in the functional packing collide with the valve core, guide sleeve, and pipe wall, generating fine particles that block the gap between the valve core and guide sleeve, causing the spool valve to jam.

[0005] Some researchers have proposed improvements to the glue supply slide valve. For example, the invention with patent number CN201810684399.8 proposes a method to meet different glue supply flow requirements by replacing the slide valve with a slider of different valve shapes. However, this technical solution is difficult to achieve multi-channel output and has not yet solved the problem of valve jamming at the slider when the supplied material is hard granular glue. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and to propose a pneumatic multi-channel anti-jamming valve slide valve and its working method.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] The present invention relates to a pneumatic multi-channel anti-jamming spool valve, comprising a valve body 1, a valve body 2, a cylinder seat, a valve body 3, a valve stem, a plug sleeve, and a piston.

[0009] Valve body 1 has valve body 2 detachably fixed to both sides and valve body 3 detachably fixed to the lower end; valve body 1 has two horizontally spaced through holes 1, and the diameter of the larger diameter section 1 at both ends of the through hole 1 is larger than the diameter of the smaller diameter section 1 in the middle; valve body 1 has two spaced glue inlets at the upper end, and each glue inlet is connected to a smaller diameter section 1 on a through hole 1 through a glue inlet channel on valve body 1; each valve body 2 has a glue outlet 1 and a glue outlet channel 1 at the upper end, and valve body 1 has two glue outlet channels 2, and each valve body 2 has a glue outlet channel 1 connected to a glue outlet channel 2, forming There is a glue outlet channel 1, and each glue outlet 1 is connected to a large diameter section 1 at one end of a through hole 1 through a glue outlet channel 1; both ends of the valve body 3 are provided with glue outlet 2, and two glue outlet 3 are provided on one side at a distance. Each glue outlet 2 and glue outlet 3 are connected to a right-angle flow channel on the valve body 3. The valve body 3 is also provided with two glue outlet channels 3, and the valve body 1 is provided with two glue outlet channels 4. Each glue outlet channel 3 is connected to a glue outlet channel 4 and forms a glue outlet channel 2. Each right-angle flow channel is connected to the large diameter section 1 at the other end of a through hole 1 through a glue outlet channel 2.

[0010] Each valve body 2 has a detachable cylinder seat fixed to its outer side, and each cylinder seat has a cylinder chamber. Each valve body 2 has two horizontally spaced through holes 2. The two ends of each through hole 1 are coaxially connected to one of the two through holes 2 on the two valve bodies 2, forming a valve passage. The two cylinder chambers are connected through the two valve passages. Each through hole 1 has a plug sleeve in the large diameter section 1 at both ends. The plug sleeve is made of polytetrafluoroethylene. Each plug sleeve is axially limited by one end of a guide sleeve and the boss of the corresponding through hole 1. The outer ring is interference-fitted with the corresponding through hole one, and the inner ring is interference-fitted with the large diameter section two at one end of the corresponding valve stem; the other end of the guide sleeve is axially limited by the boss of the corresponding through hole two; the two valve stems are placed in the two valve passages, and each valve stem and the corresponding two guide sleeves form a sliding pair; the diameter of the small diameter section two in the middle of the valve stem is smaller than the diameter of the large diameter section two at both ends; the two pistons and the two cylinder chambers form a sliding pair; one end of each of the two valve stems is fixed to one piston, and the other end is fixed to the other piston, and each of the two cylinder seats is provided with an air hole, and each air hole communicates with the cylinder chamber of the corresponding cylinder seat.

[0011] Each glue inlet channel is perpendicular to the corresponding through hole one. Each glue outlet channel one and each glue outlet channel two are connected to the corresponding through hole one by a section of the channel perpendicular to the corresponding through hole one. The connection position between each glue outlet channel one and each glue outlet channel two and the corresponding through hole one is located at the concave ring on the corresponding plug sleeve. Each concave ring on the plug sleeve has several holes arranged equidistantly along the circumference.

[0012] Preferably, the valve body has two cylindrical holes that are respectively connected to two glue outlet channels, and a sensor is fixed in each of the two cylindrical holes.

[0013] Preferably, the valve body has two cylindrical holes II that are respectively connected to two right-angle flow channels, and a sensor II is fixed inside each of the two cylindrical holes II.

[0014] Preferably, a sealing ring is provided on the valve stem at the position where the cylinder cavity and the second through hole connect.

[0015] Preferably, the valve body 2 has two observation ports that are respectively connected to the two through holes 2.

[0016] Preferably, the guide sleeve is made of ceramic material, and the valve stem is made of polymer material, metal, or ceramic.

[0017] Preferably, a cylinder head gasket is fixed inside the cylinder cavity.

[0018] The present invention discloses a working method for a pneumatic multi-channel anti-jamming spool valve, as detailed below:

[0019] Connect the two air ports to the two air outlets of the reversing valve via air pipes. Connect the air inlet of the reversing valve to the plunger pump via air pipes. Connect the two glue inlets to the two housings via glue inlet pipes and hydraulic pumps respectively. Then start the plunger pumps, and the controller controls the reversing valves to move, thereby pushing each piston and each valve stem to one end. The small diameter section two on the valve stem is located in the large diameter section one at one end of the corresponding through hole one. Then each hydraulic pump starts working, drawing the filler glue from the housing into each glue inlet. If the small diameter section two on the valve stem is located in the large diameter section one at the end of the corresponding through hole one that connects to the glue outlet channel one, the small diameter section two on the valve stem and the large diameter section one in the through hole one... A gap appears between the inner rings of the plug sleeve. The small diameter section 1 on the through hole 1 is connected to the large diameter section 1. The filler glue entering from each glue inlet flows out from the corresponding glue outlet 1 through the corresponding glue inlet channel, through hole 1 and glue outlet flow channel 1. If the small diameter section 2 on the valve stem is located in the other end of the large diameter section 1 connected to the glue outlet flow channel 2 on the corresponding through hole 1, a gap appears between the small diameter section 2 on the valve stem and the inner ring of the plug sleeve in the other end of the large diameter section 1. The small diameter section 1 on the through hole 1 is connected to the other end of the large diameter section 1. The filler glue entering from each glue inlet flows into the corresponding right-angle flow channel through the corresponding glue inlet channel, through hole 1 and glue outlet flow channel 2, and finally flows out from the corresponding glue outlet 2 and glue outlet 3.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. This invention uses a specially made polytetrafluoroethylene (PTFE) plug sleeve instead of a traditional sealing ring to prevent hard particles in the filler adhesive from accumulating inside the plug sleeve or entering the gap between the valve stem and the guide sleeve, thus preventing valve jamming. Furthermore, this invention designs the flow paths of the filler adhesive in valve body one, valve body two, and valve body three to be perpendicular to each other, reducing the hydraulic shock generated in the flow path when the valve stem switches positions and extending its service life.

[0022] 2. This invention has two glue inlets, which can be used to inject glue at the same time or only one glue inlet can be used. The filler glue can be made of only one type of filler or a mixture of multiple filler components. Each glue inlet has a corresponding outlet 1, outlet 2 and outlet 3. By controlling the movement of the valve stem, the filler glue can be injected into multiple outlets or injected into multiple outlets. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a cross-sectional view of the present invention;

[0025] Figure 3 This is a front view of the present invention;

[0026] Figure 4 This is a rear view of the present invention;

[0027] Figure 5 This is a top view of the present invention;

[0028] Figure 6 This is a side view of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the plug sleeve in this invention. Detailed Implementation

[0030] The present invention will now be further described with reference to the accompanying drawings.

[0031] like Figure 1 and Figure 2 As shown, the present invention provides a pneumatic multi-channel anti-jamming spool valve, comprising a valve body 1, a valve body 2, a cylinder seat 3, a valve body 3, a valve stem 10, a plug sleeve 11, and a piston 14.

[0032] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, valve body 1 has valve body 2 detachably fixed to both sides, and valve body 3 detachably fixed to the lower end; valve body 1 has two horizontally spaced through holes 1, and the diameter of the larger diameter section 1 at both ends of the through hole 1 is larger than the diameter of the smaller diameter section 1 in the middle; valve body 1 has two spaced glue inlets 7 at the upper end, and each glue inlet 7 is connected to the smaller diameter section 1 in the middle of one through hole 1 through a glue inlet channel opened on valve body 1; each valve body 2 has a glue outlet 5 and a glue outlet channel 1 at the upper end, and valve body 1 has two glue outlet channels 2. Each valve body 2 has a glue outlet channel 1 connected to a glue outlet channel 2, forming a... There is a glue outlet channel 1, and each glue outlet 5 is connected to a large diameter section 1 at one end of a through hole 1 through a glue outlet channel 1; both ends of the valve body 3 4 are provided with glue outlet 2 9, and two glue outlet 3 12 are provided on one side at intervals. Each glue outlet 2 9 is connected to a glue outlet 3 12 through a right-angle flow channel opened on the valve body 3 4. The valve body 3 4 is provided with two glue outlet channels 3, and the valve body 1 1 is provided with two glue outlet channels 4. Each glue outlet channel 3 is connected to a glue outlet channel 4 and forms a glue outlet channel 2. Each right-angle flow channel is connected to the large diameter section 1 at the other end of a through hole 1 through a glue outlet channel 2.

[0033] Each valve body 2 has a detachable cylinder seat 3 fixed to its outer side, and each cylinder seat 3 has a cylinder chamber. Each valve body 2 has two horizontally spaced through holes 2. The two ends of each through hole 2 are coaxially connected to one of the two through holes 2 on the two valve bodies 2, forming a valve passage. The two cylinder chambers are connected through the two valve passages. Each through hole 1 has a plug sleeve 11 inside its large-diameter section 1 at both ends. The plug sleeve 11 is made of polytetrafluoroethylene (PTFE). Each plug sleeve 11 is axially limited at both ends by a guide sleeve and a boss of the corresponding through hole 1. The outer ring of each plug sleeve 11 is interference-fitted with the corresponding through hole 1, and the inner ring is interference-fitted with the large-diameter section 2 at one end of the corresponding valve stem 10 to ensure sealing. It also has a compensation function under certain wear, thus making it more wear-resistant and making it extremely difficult for packing to accumulate in the plug sleeve or enter the gap between the valve stem and the guide sleeve to cause valve jamming. Polytetrafluoroethylene also has wear-resistant, high-temperature resistant and corrosion-resistant properties. The other end of the guide sleeve is axially limited by the boss of the corresponding through hole two. The two valve stems 10 are placed in the two valve passages, and each valve stem 10 and the corresponding two guide sleeves form a sliding pair. The diameter of the small diameter section two in the middle of the valve stem 10 is smaller than the diameter of the large diameter section two at both ends. The two pistons 14 and the two cylinder chambers form a sliding pair. One end of each of the two valve stems is fixed to one piston 14, and the other end is fixed to the other piston 14. Both cylinder seats 3 are provided with air holes, and each air hole is connected to the cylinder chamber of the corresponding cylinder seat 3.

[0034] In this configuration, each glue inlet channel is perpendicular to the corresponding through hole one, and the section of each glue outlet channel one and each glue outlet channel two connected to the corresponding through hole one is perpendicular to the corresponding through hole one, thereby reducing the impact of the filler glue on the channels or flow paths inside valve body one 1, valve body two 2, and valve body three 4 when the valve stem 10 is displaced; the connection position between each glue outlet channel one and each glue outlet channel two and the corresponding through hole one is located at the concave ring on the corresponding plug sleeve 11, and each concave ring on the plug sleeve 11 is provided with several holes arranged equidistantly along the circumference, such as... Figure 7 As shown, the concave ring of the plug sleeve 11 and the holes arranged equidistantly along the circumference can further reduce the impact of the packing adhesive on the channels or flow paths inside the valve body 1, valve body 2 and valve body 3 when the valve stem 10 is displaced.

[0035] In a preferred embodiment, the valve body 1 has two cylindrical holes 6 that are respectively connected to two glue outlet channels 1. A sensor 1 is fixed in each of the two cylindrical holes 6. The sensor 1 is used to measure the glue flow rate of the corresponding glue outlet hole 5.

[0036] In a preferred embodiment, the valve body 3 4 has two cylindrical holes 2 8 that are respectively connected to two right-angle flow channels. A sensor 2 is fixed in each of the two cylindrical holes 2 8. The sensor 2 is used to measure the dispensing flow rate of the corresponding dispensing port 2 9 and dispensing port 3 12.

[0037] In a preferred embodiment, a sealing ring 16 is provided on the valve stem 10 at the position where the cylinder chamber and the through hole 2 communicate, to prevent gas leakage in the cylinder chamber.

[0038] In a preferred embodiment, the valve body 2 has two observation ports 13 that are respectively connected to the two through holes 2. The observation ports 13 are used to observe whether there is glue leakage in the valve channel when the corresponding valve stem 10 moves. If there is glue leakage, the valve stem 10 needs to be replaced.

[0039] In a preferred embodiment, the guide sleeve is made of ceramic material. The self-lubricating, corrosion-resistant, and wear-resistant properties of ceramic reduce the friction between the guide sleeve and the valve stem 10. The valve stem 10 is made of polymer material, metal, or ceramic, with polymer material being preferred because it is easier to replace when worn, and using a material that is more easily damaged than the guide sleeve prevents valve jamming.

[0040] In a preferred embodiment, a cylinder head gasket 15 is fixed inside the cylinder chamber. The cylinder head gasket 15 is used to buffer the impact force generated when the corresponding valve stem 10 moves to the end.

[0041] The present invention discloses a working method for a pneumatic multi-channel anti-jamming spool valve, as detailed below:

[0042] Connect the two air ports to the two air outlets of the reversing valve via air pipes, and connect the air inlet of the reversing valve to the plunger pump via air pipes; connect the two glue inlets 7 to the two housings via glue inlet pipes and hydraulic pumps respectively; then start the plunger pumps, and the controller controls the reversing valves to move, thereby pushing each piston 14 and each valve stem 10 to one end. The small diameter section 2 on the valve stem 10 is located in the large diameter section 1 at one end of the corresponding through hole 1. Then each hydraulic pump starts working, drawing the filler glue in the housing into each glue inlet 7; if the small diameter section 2 on the valve stem 10 is located in the large diameter section 1 at the end of the through hole 1 that communicates with the glue outlet flow channel 1, the small diameter section 2 on the valve stem 10 and the filler glue in the large diameter section 1 of the through hole 1... A gap appears between the inner rings of sleeve 11. The small diameter section 1 on through hole 1 is connected to the large diameter section 1. The filler glue entering through each glue inlet 7 flows out through the corresponding glue inlet channel, through hole 1 and glue outlet channel 1 from the corresponding glue outlet 1. If the small diameter section 2 on valve stem 10 is located in the other end of the large diameter section 1 connected to the glue outlet channel 2 on the corresponding through hole 1, a gap appears between the small diameter section 2 on valve stem 10 and the inner ring of sleeve 11 in the other end of the large diameter section 1. The small diameter section 1 on through hole 1 is connected to the other end of the large diameter section 1. The filler glue entering through each glue inlet 7 flows into the corresponding right-angle flow channel through the corresponding glue inlet channel, through hole 1 and glue outlet channel 2, and finally flows out from the corresponding glue outlet 2 9 and glue outlet 3 12.

[0043] The filler adhesive in the two chambers can be made of only one type of filler or a mixture of multiple fillers. The filler adhesive in the two chambers can be the same or different. The two hydraulic pumps can be started simultaneously or only one pump can be started, thus achieving one inlet and multiple outlets or multiple inlets and multiple outlets.

Claims

1. A pneumatically operated multi-pass non-sticking valve spool comprising a valve body one, a cylinder block, a valve body three, a valve stem and a piston, characterized in that: It also includes a valve body 2 and a plug sleeve; valve body 2 is detachably fixed to both sides of valve body 1, and valve body 3 is detachably fixed to the lower end; valve body 1 has two horizontally spaced through holes 1, and the diameter of the large diameter section 1 at both ends of the through hole 1 is larger than the diameter of the small diameter section 1 in the middle; valve body 1 has two spaced glue inlets at the upper end, and each glue inlet is connected to a small diameter section 1 of one through hole 1 through a glue inlet channel opened on valve body 1; each valve body 2 has a glue outlet 1 and a glue outlet channel 1 at the upper end, and valve body 1 has two glue outlet channels 2, and each valve body 2's glue outlet channel 1 is connected to a glue outlet channel 2. The valve body 3 has two outlet ports 2 at both ends and two outlet ports 3 spaced apart on one side. Each outlet port 2 is connected to an outlet port 3 through a right-angle channel on the valve body 3. The valve body 3 has two outlet channels 3 and the valve body 1 has two outlet channels 4. Each outlet channel 3 is connected to an outlet channel 4 and forms an outlet channel 2. Each right-angle channel is connected to an outlet port 1 through an outlet channel 2. Each valve body 2 has a detachable cylinder seat fixed to its outer side, and each cylinder seat has a cylinder chamber. Each valve body 2 has two horizontally spaced through holes 2. The two ends of each through hole 1 are coaxially connected to one of the two through holes 2 on the two valve bodies 2, forming a valve passage. The two cylinder chambers are connected through the two valve passages. Each through hole 1 has a plug sleeve in the large diameter section 1 at both ends. The plug sleeve is made of polytetrafluoroethylene. Each plug sleeve is axially limited by one end of a guide sleeve and the boss of the corresponding through hole 1. The outer ring is interference-fitted with the corresponding through hole one, and the inner ring is interference-fitted with the large diameter section two at one end of the corresponding valve stem; the other end of the guide sleeve is axially limited by the boss of the corresponding through hole two; the two valve stems are placed in the two valve passages, and each valve stem and the corresponding two guide sleeves form a sliding pair; the diameter of the small diameter section two in the middle of the valve stem is smaller than the diameter of the large diameter section two at both ends; the two pistons and the two cylinder chambers form a sliding pair; one end of each of the two valve stems is fixed to one piston, and the other end is fixed to the other piston, and each of the two cylinder seats is provided with an air hole, and each air hole communicates with the cylinder chamber of the corresponding cylinder seat; Each glue inlet channel is perpendicular to the corresponding through hole one. Each glue outlet channel one and each glue outlet channel two are connected to the corresponding through hole one by a section of the channel perpendicular to the corresponding through hole one. The connection position between each glue outlet channel one and each glue outlet channel two and the corresponding through hole one is located at the concave ring on the corresponding plug sleeve. Each concave ring on the plug sleeve has several holes arranged equidistantly along the circumference.

2. A multi-pass, anti-stick, air operated valve according to claim 1, wherein: The valve body has two cylindrical holes that are respectively connected to two glue outlet channels, and a sensor is fixed in each of the two cylindrical holes.

3. A gas dynamic multi-pass anti-sticking valve spool according to claim 1, characterized in that: The valve body has two cylindrical holes 2 that are respectively connected to two right-angle flow channels, and a sensor 2 is fixed inside each of the two cylindrical holes 2.

4. A pneumatic multi-channel anti-jamming spool valve according to claim 1, characterized in that: A sealing ring is provided on the valve stem at the position where the cylinder cavity and the second through hole connect.

5. A pneumatic multi-channel anti-jamming spool valve according to claim 1, characterized in that: The valve body 2 has two observation ports that are respectively connected to two through holes 2.

6. A pneumatic multi-channel anti-jamming spool valve according to claim 1, characterized in that: The guide sleeve is made of ceramic material, and the valve stem is made of polymer material, metal or ceramic.

7. A pneumatic multi-channel anti-jamming spool valve according to claim 1, characterized in that: A cylinder head gasket is fixed inside the cylinder cavity.

8. The operating method of a pneumatic multi-channel anti-jamming valve slide valve according to any one of claims 1 to 7, characterized in that: Specifically as follows: Connect the two air ports to the two air outlets of the reversing valve via air pipes. Connect the air inlet of the reversing valve to the plunger pump via air pipes. Connect the two glue inlets to the two housings via glue inlet pipes and hydraulic pumps respectively. Then start the plunger pumps, and the controller controls the reversing valves to move, thereby pushing each piston and each valve stem to one end. The small diameter section two on the valve stem is located in the large diameter section one at one end of the corresponding through hole one. Then each hydraulic pump starts working, drawing the filler glue from the housing into each glue inlet. If the small diameter section two on the valve stem is located in the large diameter section one at the end of the corresponding through hole one that connects to the glue outlet channel one, the small diameter section two on the valve stem and the large diameter section one in the through hole one... A gap appears between the inner rings of the plug sleeve. The small diameter section 1 on the through hole 1 is connected to the large diameter section 1. The filler glue entering from each glue inlet flows out from the corresponding glue outlet 1 through the corresponding glue inlet channel, through hole 1 and glue outlet flow channel 1. If the small diameter section 2 on the valve stem is located in the other end of the large diameter section 1 connected to the glue outlet flow channel 2 on the corresponding through hole 1, a gap appears between the small diameter section 2 on the valve stem and the inner ring of the plug sleeve in the other end of the large diameter section 1. The small diameter section 1 on the through hole 1 is connected to the other end of the large diameter section 1. The filler glue entering from each glue inlet flows into the corresponding right-angle flow channel through the corresponding glue inlet channel, through hole 1 and glue outlet flow channel 2, and finally flows out from the corresponding glue outlet 2 and glue outlet 3.

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