A self-cleaning pneumatic valve and its use method

Abstract

The present invention belongs to the technical field of pneumatic valves, and specifically is a self-cleaning pneumatic valve and a method for using the same, wherein the self-cleaning pneumatic valve comprises: a valve body, a ball core, a bracket, a pneumatic actuator, a valve stem and a pneumatic cleaning mechanism; when the valve body needs to be closed, the present invention introduces gas into the cylinder body through the pneumatic actuator, the gas enters the No. 1 chamber through the No. 1 pipe, and then enters the No. 1 groove from the No. 1 chamber, the gas enters the No. 2 chamber from the No. 1 groove, the air pressure in the No. 2 chamber increases, pushing the piston rod to move downward, and during the downward movement of the piston rod, the telescopic rod is driven to move downward, and the end of the telescopic rod away from the piston rod is rotatably connected to a scraper rod, the No. 1 scraper rod is always in contact with the inner wall of the ball core, and during the downward movement of the piston rod, the No. 1 scraper rod scrapes off the scale on the inner wall of the ball core.

Description

Technical Field

[0001] The invention belongs to the technical field of pneumatic valves, in particular to a self-cleaning pneumatic valve and a use method thereof. Background Art

[0002] Pneumatic valves are valves driven by compressed air. Pneumatic valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. Pneumatic valves use compressed air to drive the movement of multiple groups of combined pneumatic pistons in the actuator, transmit force to the characteristics of the crossbeam and the inner curved track, drive the hollow spindle to rotate, and the compressed air disc is transmitted to each cylinder to change the inlet and outlet positions to change the direction of spindle rotation. According to the requirements of the rotation torque required by the load valve, the number of cylinder combinations can be adjusted to drive the load valve to work.

[0003] Pneumatic ball valve is a type of pneumatic valve. It can be closed tightly by rotating the pneumatic actuator 90 degrees with a very small torque. The completely equal inner cavity of the valve body provides a very small resistance and straight flow channel for the medium. It is generally believed that the ball valve is most suitable for direct opening and closing. The main features of the ball valve are its compact structure and easy operation; the ball valve body can be integral or combined.

[0004] However, during the use of the pneumatic ball valve, its internal ball core channel will often produce scale or impurities as time goes by. If these scales or impurities are not cleaned on the ball core channel, they will cause blockage of the ball core channel over time, causing the pneumatic ball valve to lose its function. However, daily maintenance and cleaning of the pneumatic ball valve usually requires disassembly, which undoubtedly increases the workload and is more cumbersome.

[0005] In view of this, the present invention solves the above technical problems by proposing a self-cleaning pneumatic valve and a method of using the same. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art and solve the problem of cleaning scale and impurities in the ball core channel of a pneumatic ball valve, the present invention provides a self-cleaning pneumatic valve and a method of using the same.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a method for using a self-cleaning pneumatic valve according to the present invention, the method for using the self-cleaning pneumatic valve comprises the following steps:

[0008] S1: Install the valve body in the pipeline, and introduce gas into the cylinder of the pneumatic actuator through an external air pressure source. The air pressure in the cylinder increases, causing the piston in the cylinder to move to both sides of the cylinder. The rack on the piston drives the valve stem to rotate, and the valve stem drives the ball core to rotate. During the rotation of the ball core, the valve body changes from on to off. Similarly, pump gas into the cylinder of the pneumatic actuator through an external air pressure source. The air pressure in the cylinder decreases, causing the piston in the cylinder to move to the middle of the cylinder. During the movement of the piston, the rack drives the valve stem to rotate, and then drives the ball core to rotate. During the rotation of the ball core, the valve body changes from off to on.

[0009] S2: When the valve body needs to be closed, gas is introduced into the cylinder body through the pneumatic actuator. The gas enters the No. 1 chamber through the No. 1 pipe, and then enters the No. 1 groove from the No. 1 chamber. The gas enters the No. 2 chamber from the No. 1 groove. The air pressure in the No. 2 chamber increases, pushing the piston rod to move downward. During the downward movement of the piston rod, the telescopic rod is driven to move downward. The end of the telescopic rod away from the piston rod rotates and is connected to the No. 1 scraper rod. The No. 1 scraper rod is always in contact with the inner wall of the ball core. During the downward movement of the piston rod, the No. 1 scraper rod scrapes off the scale on the inner wall of the ball core.

[0010] S3: When the ball core always keeps the valve body in a conducting state, or when in the conducting state, impurities in the water accumulate in the ball core, causing the valve body to be blocked, at this time, the solenoid valve is closed and channel No. 3 is opened. The external air pressure source through channel No. 3 allows frequent reciprocating air filling and extraction into chamber No. 2, driving the piston rod, telescopic rod and scraper rod No. 1 to reciprocate up and down, scraping the inner wall of the ball core to clean the scale; at the same time, the piston rod, telescopic rod and scraper rod No. 1 reciprocate up and down, cooperating with the flow of water to dredge the inside of the ball core, reducing the accumulation of impurities in the water in the ball core.

[0011] A self-cleaning pneumatic valve, the self-cleaning pneumatic valve is suitable for the above-mentioned use method, and the self-cleaning pneumatic valve comprises:

[0012] Valve body;

[0013] A ball core, the ball core is movably arranged inside the valve body;

[0014] A bracket, wherein the bracket is fixedly mounted on the top of the valve body;

[0015] A pneumatic actuator, wherein the pneumatic actuator is arranged on the top of the bracket;

[0016] A valve stem, which is fixedly connected to the top of the ball core and extends through the bracket to the inside of the pneumatic actuator. The pneumatic actuator, the valve stem and the ball core cooperate with each other to realize the opening and closing of the valve body;

[0017] A pneumatic cleaning mechanism moves up and down in the ball core under the control of a pneumatic actuator to clean the inside of the ball core.

[0018] Preferably, the pneumatic cleaning mechanism comprises:

[0019] A first cavity, wherein the first cavity is opened inside the bracket;

[0020] A No. 1 pipe, which runs through the interior of the bracket and connects the No. 1 cavity with the interior of the cylinder body of the pneumatic actuator;

[0021] A second cavity, the second cavity is opened inside the valve stem and communicates with the inside of the ball core;

[0022] A No. 1 groove, which is provided on the valve stem, corresponds to the No. 1 cavity and communicates with the No. 2 cavity;

[0023] A piston rod, the piston rod being slidably mounted in the second chamber;

[0024] A telescopic rod, the telescopic rod consists of a cylinder, a rod body and a No. 1 spring. The cylinder of the telescopic rod is horizontally fixedly installed at the bottom of the piston rod. A No. 1 spring is fixedly installed inside the cylinder of the telescopic rod. One end of the No. 1 spring is fixedly connected to the inner surface of the side wall of the telescopic rod cylinder close to the piston rod, and the other end of the No. 1 spring is fixedly connected to one end of the telescopic rod body close to the piston rod; one end of the telescopic rod body away from the piston rod is rotatably connected to a No. 1 scraper rod.

[0025] Preferably, the vertical cross-section of the first scraper rod is a triangle.

[0026] Preferably, a No. 2 spring is fixedly connected between the top of the piston rod and the top of the No. 2 chamber, a No. 1 channel is provided on the bracket, a No. 2 channel is provided on the valve stem, and the No. 2 channel is connected to the No. 2 chamber.

[0027] Preferably, the horizontal cross-section of the No. 1 groove is a sector with a central angle of 90 degrees; on the horizontal cross-section of the valve stem, the line a connecting the No. 2 channel and the center axis of the valve stem, and the line b connecting the nearest point on the No. 1 groove to the No. 2 channel and the center axis of the valve stem, the angle between a and b is 90 degrees.

[0028] Preferably, a solenoid valve is fixedly arranged inside the No. 1 pipe, and a No. 3 channel is opened on the side of the No. 1 cavity away from the valve stem.

[0029] Preferably, a push rod is fixedly mounted on the top of the piston rod.

[0030] Preferably, the end of the telescopic rod away from the piston rod is rotatably connected to a rod No. 1 and a rod No. 2, the rod No. 1 is located above the telescopic rod, the rod No. 2 is located below the telescopic rod, and the ends of the rod No. 1 and the rod No. 2 away from the telescopic rod are respectively rotatably connected to a scraping rod No. 2.

[0031] Preferably, a torsion spring is provided at the connection between the No. 1 rod, the No. 2 rod and the telescopic rod.

[0032] The beneficial effects of the present invention are as follows:

[0033] 1. A self-cleaning pneumatic valve and a method of using the same described in the present invention, when the valve body needs to be closed, gas is introduced into the cylinder body through the pneumatic actuator, the gas enters the No. 1 chamber through the No. 1 pipe, and then enters the No. 1 groove from the No. 1 chamber, the gas enters the No. 2 chamber from the No. 1 groove, the air pressure in the No. 2 chamber increases, pushing the piston rod to move downward, and during the downward movement of the piston rod, the telescopic rod is driven to move downward, and the end of the telescopic rod away from the piston rod is rotated and connected to a scraper rod, the scraper rod is always in contact with the inner wall of the ball core, and during the downward movement of the piston rod, the scraper rod scrapes off the scale on the inner wall of the ball core.

[0034] 2. A self-cleaning pneumatic valve and a method of using the same described in the present invention. When the ball core always keeps the valve body in a conducting state, or when in the conducting state, impurities in the water accumulate in the ball core, causing the valve body to be blocked, at this time, the solenoid valve is closed and channel No. 3 is opened. The external air pressure source through channel No. 3 allows air to be frequently and reciprocally filled into and exhausted from chamber No. 2, driving the piston rod, telescopic rod and scraper rod No. 1 to reciprocate up and down, scraping the inner wall of the ball core to clean scale; at the same time, the piston rod, telescopic rod and scraper rod No. 1 reciprocate up and down, cooperating with the flow of water to dredge the inside of the ball core, reducing the accumulation of impurities in the water in the ball core. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] Figure 1 is a method flow chart of the method of using the present invention;

[0037] Figure 2 is a three-dimensional diagram of the pneumatic valve of the present invention;

[0038] Figure 3 is a cross-sectional view of the pneumatic valve of the present invention;

[0039] Figure 4 is a side sectional view of the internal structure of the pneumatic actuator of the present invention;

[0040] Figure 5 yes Figure 3 A local enlarged view of point A;

[0041] Figure 6 yes Figure 3 A partial enlarged view of point B;

[0042] Figure 7 1. is a diagram showing the position relationship of the valve stem relative to the bracket when the pneumatic valve of the present invention is opened;

[0043] Figure 8 1. is a diagram showing the position relationship of the valve stem relative to the bracket when the pneumatic valve of the present invention is closed;

[0044] In the figure: valve body 1, ball core 2, bracket 3, channel No. 1 31, pneumatic actuator 4, valve stem 5, channel No. 2 51, pneumatic cleaning mechanism 6, chamber No. 1 61, channel No. 3 611, tube No. 1 62, solenoid valve 621, chamber No. 2 63, slot No. 1 64, piston rod 65, spring No. 2 651, push rod 652, telescopic rod 66, spring No. 1 661, scraper rod No. 1 662, rod No. 1 663, rod No. 2 664, scraper rod No. 2 665. DETAILED DESCRIPTION

[0045] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0046] like Figures 1 to 8 As shown, a method for using a self-cleaning pneumatic valve according to the present invention comprises the following steps:

[0047] S1: Install the valve body 1 in the pipeline, and introduce gas into the cylinder of the pneumatic actuator 4 through an external air pressure source. The air pressure in the cylinder increases, causing the piston in the cylinder to move to both sides of the cylinder. The rack on the piston drives the valve stem 5 to rotate, and the valve stem 5 drives the ball core 2 to rotate. During the rotation of the ball core 2, the valve body 1 changes from being on to being off. Similarly, pump gas into the cylinder of the pneumatic actuator 4 through an external air pressure source, and the air pressure in the cylinder decreases, causing the piston in the cylinder to move to the middle of the cylinder. During the movement of the piston, the rack drives the valve stem 5 to rotate, and then drives the ball core 2 to rotate. During the rotation of the ball core 2, the valve body 1 changes from being off to being on.

[0048] S2: When the valve body 1 needs to be closed, gas is introduced into the cylinder body through the pneumatic actuator 4, and the gas enters the No. 1 chamber 61 through the No. 1 pipe 62, and then enters the No. 1 groove 64 from the No. 1 chamber 61, and the gas enters the No. 2 chamber 63 from the No. 1 groove 64. The air pressure in the No. 2 chamber 63 increases, pushing the piston rod 65 to move downward. During the downward movement of the piston rod 65, the telescopic rod 66 is driven to move downward. The end of the telescopic rod 66 away from the piston rod 65 is rotated and connected to the No. 1 scraper rod 662. The No. 1 scraper rod 662 is always in contact with the inner wall of the ball core 2. During the downward movement of the piston rod 65, the No. 1 scraper rod 662 scrapes off the scale or impurities on the inner wall of the ball core 2;

[0049] S3: When the ball core 2 always keeps the valve body 1 in a conducting state, or when in the conducting state, impurities in the water accumulate in the ball core 2, causing the valve body 1 to be blocked, at this time, the solenoid valve 621 is closed, and the No. 3 channel 611 is opened, and the external air pressure source through the No. 3 channel 611 allows frequent reciprocating air filling and extraction into the No. 2 chamber 63, driving the piston rod 65, the telescopic rod 66 and the No. 1 scraper rod 662 to reciprocate up and down, scraping the inner wall of the ball core 2 back and forth to clean the scale; at the same time, the piston rod 65, the telescopic rod 66 and the No. 1 scraper rod 662 reciprocate up and down, cooperating with the flow of water to dredge the inside of the ball core 2, reducing the accumulation of impurities in the water in the ball core 2.

[0050] A self-cleaning pneumatic valve, the self-cleaning pneumatic valve is suitable for the above-mentioned use method, and the self-cleaning pneumatic valve comprises:

[0051] Valve body 1;

[0052] A ball core 2, wherein the ball core 2 is movably arranged inside the valve body 1;

[0053] A bracket 3, wherein the bracket 3 is fixedly installed on the top of the valve body 1;

[0054] A pneumatic actuator 4, wherein the pneumatic actuator 4 is arranged on the top of the bracket 3;

[0055] The valve stem 5 is fixedly connected to the top of the ball core 2 and extends through the bracket 3 to the inside of the pneumatic actuator 4. The pneumatic actuator 4, the valve stem 5 and the ball core 2 cooperate with each other to realize the opening and closing of the valve body 1;

[0056] The pneumatic cleaning mechanism 6 moves up and down in the ball core 2 under the control of the pneumatic actuator 4 to clean the inside of the ball core 2 .

[0057] During operation, the pneumatic actuator 4, the valve stem 5 and the ball core 2 cooperate with each other to realize the opening and closing of the valve body 1. Specifically, gas is introduced into the cylinder of the pneumatic actuator 4 through an external air pressure source (the air inlet of the external air pressure source is located in the middle of the cylinder), and the air pressure in the cylinder increases, causing the piston in the cylinder to move to both sides of the cylinder. Since racks are fixedly installed on the opposite surfaces of the pistons on both sides of the cylinder, and teeth that cooperate with the racks are arranged on the valve stem 5, when the piston moves to both sides of the cylinder, the rack on the piston drives the valve stem 5 to rotate, and the valve stem 5 drives the ball core 2 to rotate. During the rotation of the ball core 2, the valve body 1 changes from being on to being off; similarly, gas is pumped into the cylinder of the pneumatic actuator 4 through an external air pressure source, and the air pressure in the cylinder decreases, causing the piston in the cylinder to move to the middle part of the cylinder. During the movement of the piston, the rack drives the valve stem 5 to rotate, and then drives the ball core 2 to rotate. During the rotation of the ball core 2, the valve body 1 changes from being off to being on; this is repeated to realize the closing and on of the valve body 1;

[0058] However, during use, scale or impurities will condense on the side walls of the internal channel of the ball core 2 of the valve body 1 over time, so a pneumatic cleaning mechanism 6 is provided. The pneumatic cleaning mechanism 6 moves up and down in the ball core 2 under the control of the pneumatic actuator 4 to clean the inside of the ball core 2.

[0059] As a specific embodiment of the present invention, the pneumatic cleaning mechanism 6 includes:

[0060] A first cavity 61, wherein the first cavity 61 is opened inside the bracket 3;

[0061] A first pipe 62, the first pipe 62 passes through the interior of the bracket 3 and connects the first cavity 61 with the interior of the cylinder of the pneumatic actuator 4;

[0062] The second cavity 63 is opened inside the valve stem 5 and communicates with the inside of the ball core 2;

[0063] A first groove 64, the first groove 64 is formed on the valve stem 5, the first groove 64 corresponds to the first cavity 61 and communicates with the second cavity 63;

[0064] A piston rod 65, wherein the piston rod 65 is slidably mounted in the second chamber 63;

[0065] The telescopic rod 66 is composed of a cylinder, a rod body and a No. 1 spring 661. The cylinder of the telescopic rod 66 is horizontally fixedly installed at the bottom of the piston rod 65. The inside of the cylinder of the telescopic rod 66 is fixedly installed with a No. 1 spring 661. One end of the No. 1 spring 661 is fixedly connected to the inner surface of the side wall of the cylinder of the telescopic rod 66 close to the piston rod 65, and the other end of the No. 1 spring 661 is fixedly connected to an end of the rod body slidingly connected inside the telescopic rod 66 close to the piston rod 65; the end of the telescopic rod 66 body away from the piston rod 65 is rotatably connected to a No. 1 scraper rod 662.

[0066] During operation, if the valve body 1 is in a long-term conduction state in advance, scale is easy to condense on the inner wall of the ball core 2, and the accumulation of scale affects the use of the ball core 2; when the valve body 1 needs to be closed, gas is introduced into the cylinder body through the pneumatic actuator 4 to increase the air pressure inside the cylinder body, and the piston moves to both sides of the cylinder body, so that the rack drives the valve stem 5 to rotate, and then drives the ball core 2 to rotate, so that the valve body 1 is closed; in the above process, during the process of introducing gas into the cylinder body, the gas enters the No. 1 chamber 61 through the No. 1 pipe 62, and then enters the No. 1 groove 64 from the No. 1 chamber 61, and the gas enters the No. 2 chamber 63 from the No. 1 groove 64. The air pressure in the No. 2 chamber 63 increases, pushing the piston rod 65 to move downward. Since the telescopic rod 66 is horizontally fixedly installed at the bottom of the piston rod 65, and the No. 1 spring 661 is fixedly installed inside the telescopic rod 66, the process of the piston rod 65 moving downward In the process, the telescopic rod 66 is driven to move downward, and the end of the telescopic rod 66 away from the piston rod 65 is rotated and connected to a scraper rod 662. A spring 661 is arranged inside the telescopic rod 66 to enable the telescopic rod 66 to be retracted and extended, and the spring 661 is always in a compressed state, that is, the rod body of the telescopic rod 66 can always push against the inner wall of the ball core 2, that is, the scraper rod 662 is always in contact with the inner wall of the ball core 2, and in the process that the piston rod 65 moves downward, the scraper rod 662 scrapes off the scale or impurities on the inner wall of the ball core 2; it avoids the scale or impurities on the inner wall of the ball core 2 from condensing too thickly, affecting the use of the ball core 2; that is, the above process can automatically control the pneumatic cleaning mechanism 6 to clean the inner wall of the ball core 2 during the process that the pneumatic actuator 4 controls the rotation of the ball core 2, so that the inner wall of the ball core 2 can be cleaned after use.

[0067] As a specific implementation of the present invention, the vertical cross-section of the first scraper rod 662 is a triangle.

[0068] When working, the vertical cross-section of the No. 1 scraper rod 662 is a triangle, and the No. 1 scraper rod 662 has an inclined surface relative to the side wall of the core 2. This arrangement enables the No. 1 scraper rod 662 to have a shoveling effect on the inner wall of the core 2 during its movement inside the core 2, thereby making it easier for the No. 1 scraper rod 662 to clean scale or impurities on the inner wall of the core 2.

[0069] As a specific embodiment of the present invention, a No. 2 spring 651 is fixedly connected between the top of the piston rod 65 and the top of the No. 2 chamber 63, a No. 1 channel 31 is opened on the bracket 3, and a No. 2 channel 51 is opened on the valve stem 5, and the No. 2 channel 51 is connected to the No. 2 chamber 63.

[0070] The horizontal section of the No. 1 groove 64 is a sector with a central angle of 90 degrees; on the horizontal section of the valve stem 5, the angle between the line a connecting the No. 2 channel 51 and the center axis of the valve stem 5 and the line b connecting the nearest point on the No. 1 groove 64 to the No. 2 channel 51 and the center axis of the valve stem 5 is 90 degrees.

[0071] During operation, during the rotation of the ball core 2, that is, during the opening and closing of the valve body 1 controlled by the ball core 2, the ball core 2 rotates 90 degrees each time, so the horizontal section of the first groove 64 is a sector with a central angle of 90 degrees. Figure 7 As shown, when the ball core 2 makes the ball valve in the conducting state, the state of the valve stem 5 is as follows Figure 7 As shown, at this time, the No. 1 groove 64 is connected with the No. 1 cavity 61. When the valve stem 5 rotates to drive the ball core 2 to close the valve body 1, since the horizontal cross-section of the No. 1 groove 64 is a sector with a central angle of 90 degrees, the No. 1 groove 64 is always connected with the No. 1 cavity 61 during the rotation of the valve stem 5. This arrangement allows the No. 1 cavity 61 to always inflate into the No. 2 cavity 63, so that when the valve body 1 is closed, the piston rod 65 can drive the telescopic rod 66 and the No. 1 scraping rod 662 downward to scrape the inner wall of the ball core 2 (the No. 2 spring 651 is stretched) to clean the inner wall of the ball core 2; when the ball core 2 closes the valve body 1, the state of the valve stem 5 is as shown in FIG. Figure 8 As shown, at this time, cavity No. 61 is not connected with groove No. 64. Because on the horizontal section of valve stem 5, the line a connecting channel No. 2 51 and the central axis of valve stem 5, and the line b connecting the nearest point on groove No. 64 to channel No. 2 51 and the central axis of valve stem 5, the angle between a and b is 90 degrees. Therefore, at this time, channel No. 2 51 is connected with channel No. 1 31, and then the gas in cavity No. 63 is discharged through channel No. 2 51 and channel No. 1 31. Under the pull of spring No. 2 651, piston rod 65 moves upward, driving telescopic rod 66 and scraper rod No. 1 662 to scrape the inner wall of ball core 2 again, thereby realizing secondary cleaning.

[0072] As a specific implementation of the present invention, a solenoid valve 621 is fixedly disposed inside the No. 1 tube 62 , and a No. 3 channel 611 is opened on the side of the No. 1 cavity 61 away from the valve stem 5 .

[0073] When working, Figure 3 and Figure 5As shown, when the ball core 2 always keeps the valve body 1 in the conducting state, or when in the conducting state, impurities in the water accumulate in the ball core 2, causing the valve body 1 to be blocked, at this time, the solenoid valve 621 is closed (under normal conditions, the solenoid valve 621 is always in the open state), and the No. 3 channel 611 is opened (under normal conditions, the No. 3 channel 611 is in the closed state), and the external air pressure source, such as an air cylinder, is passed through the No. 3 channel 611; so that air is frequently reciprocated to be filled and extracted into the No. 2 chamber 63, It drives the piston rod 65, the telescopic rod 66 and the scraper rod 662 to reciprocate up and down, scrape the inner wall of the ball core 2 back and forth, clean the scale, and reduce the scale condensing on the inner wall of the ball core 2 when the ball core 2 always keeps the valve body 1 in the conductive state; at the same time, the piston rod 65, the telescopic rod 66 and the scraper rod 662 reciprocate up and down, and cooperate with the flow of water to dredge the inside of the ball core 2, thereby reducing the accumulation of impurities in the water in the ball core 2 and causing blockage of the valve body 1.

[0074] As a specific implementation of the present invention, a push rod 652 is fixedly installed on the top of the piston rod 65 .

[0075] During operation, a push rod 652 is fixedly installed on the top of the piston rod 65. When the piston rod 65 moves up and down, the push rod 652 moves with the piston rod 65. When the valve body 1 needs to change from a closed state to a conductive state, the pneumatic actuator 4 is controlled to reduce the air pressure in the cylinder, and the pistons in the cylinder are close to each other. The rack drives the valve stem 5 to rotate. When the valve stem 5 rotates, the No. 1 groove 64 and the No. 1 chamber 61 are connected again. At this time, the air pressure in the area between the top of the piston rod 65 and the top of the No. 2 chamber 63 also drops. The purpose of setting the push rod 652 is to limit the piston rod 65 from moving up all the time and crushing the No. 2 spring 651. At the same time, it also prevents the piston rod 65 from moving up all the time and prevents the piston rod 65 from blocking the No. 1 groove 64, so that the gas cannot enter the No. 2 chamber 63 through the No. 1 groove 64 during the next operation, thereby ensuring that the device can work normally.

[0076] As a specific embodiment of the present invention, the end of the telescopic rod 66 away from the piston rod 65 is rotatably connected to a rod 663 and a rod 664, the rod 663 is located above the telescopic rod 66, the rod 664 is located below the telescopic rod 66, and the ends of the rod 663 and the rod 664 away from the telescopic rod 66 are respectively rotatably connected to a scraping rod 665.

[0077] As a specific implementation of the present invention, a torsion spring is provided at the connection between the No. 1 rod 663 , the No. 2 rod 664 and the telescopic rod 66 .

[0078] During operation, the end of the telescopic rod 66 away from the piston rod 65 is rotatably connected to the first rod 663 and the second rod 664, the first rod 663 is located above the telescopic rod 66, and the second rod 664 is located below the telescopic rod 66. The ends of the first rod 663 and the second rod 664 away from the telescopic rod 66 are respectively rotatably connected to the second scraping rod 665, and the connection between the first rod 663, the second rod 664 and the telescopic rod 66 is fixedly provided with a torsion spring. When the second scraping rod 665 at the ends of the first rod 663 and the second rod 664 contacts the inner wall of the ball core 2, the torsion spring at the connection between the first rod 663 and the second rod 664 The No. 1 rod 663 and the No. 2 rod 664 drive the No. 2 scraper rod 665 at the end to have a tendency to move away from the telescopic rod 66 and squeeze the inner wall of the ball core 2; since the telescopic rod 66 has a minimum length, when the piston rod 65 moves up and down, the obstruction of the telescopic rod 66 will hinder the piston rod 65 from continuing to move up or down, that is, the piston rod 65 has a movement stroke, so that the No. 1 scraper rod 662 has a scraping blind area, so the No. 1 rod 663 and the No. 2 rod 664 are set, so that when the piston rod 65 moves up and down, the No. 1 rod 663 and the No. 2 rod 664 can scrape off the scale or impurities in the scraping blind area; the scraping effect is guaranteed.

[0079] The specific workflow is as follows:

[0080] If the valve body 1 is in a conducting state for a long time in advance, scale is easy to condense on the inner wall of the ball core 2, and the accumulation of scale affects the use of the ball core 2; when the valve body 1 needs to be closed, gas is introduced into the cylinder body through the pneumatic actuator 4 to increase the air pressure inside the cylinder body, and the piston moves to both sides of the cylinder body, so that the rack drives the valve stem 5 to rotate, and then drives the ball core 2 to rotate, so that the valve body 1 is closed; in the above process, when the gas is introduced into the cylinder body, the gas enters the No. 1 chamber 61 through the No. 1 pipe 62, and then enters the No. 1 groove 64 from the No. 1 chamber 61, and the gas enters the No. 2 chamber 63 from the No. 1 groove 64, and the air pressure in the No. 2 chamber 63 rises The piston rod 65 is pushed downward because the telescopic rod 66 is fixedly installed horizontally at the bottom of the piston rod 65 and a spring 661 is fixedly installed inside the telescopic rod 66. Therefore, during the downward movement of the piston rod 65, the telescopic rod 66 is driven to move downward. The end of the telescopic rod 66 away from the piston rod 65 is rotated and connected to a scraper rod 662. A spring 661 is arranged inside the telescopic rod 66 so that the telescopic rod 66 can be extended and retracted, and the spring 661 is always in a compressed state, that is, the telescopic rod 66 can always push against the inner wall of the ball core 2, that is, the scraper rod 662 is always in contact with the ball core 2. 2, when the piston rod 65 moves downward, the first scraper rod 662 scrapes off the scale on the inner wall of the ball core 2, thereby preventing the scale on the inner wall of the ball core 2 from condensing too thickly and affecting the use of the ball core 2; in addition, when the ball core 2 always keeps the valve body 1 in the conducting state, or when the ball core 2 is in the conducting state, impurities in the water accumulate in the ball core 2, causing the valve body 1 to be blocked, at this time, the solenoid valve 621 is closed (under normal conditions, the solenoid valve 621 is always in the open state), and the third channel 611 is opened (under normal conditions, the third channel 611 is in the closed state), and the valve body 1 is blocked through the third channel 611. An external air pressure source, such as an air cylinder, frequently and reciprocally fills and extracts air into the No. 2 chamber 63, driving the piston rod 65, the telescopic rod 66 and the No. 1 scraper rod 662 to reciprocate up and down, scrape the inner wall of the ball core 2 back and forth, clean the scale, and reduce the scale condensing on the inner wall of the ball core 2 when the ball core 2 always keeps the valve body 1 in a conductive state; at the same time, the piston rod 65, the telescopic rod 66 and the No. 1 scraper rod 662 reciprocate up and down, and cooperate with the flow of water to dredge the inside of the ball core 2, thereby reducing the accumulation of impurities in the water in the ball core 2, which may cause the valve body 1 to be blocked.

[0081] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 2 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0082] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0083] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A self-cleaning pneumatic valve, characterized in that: The self-cleaning pneumatic valve comprises: Valve body (1); A ball core (2), wherein the ball core (2) is movably arranged inside the valve body (1); A bracket (3), wherein the bracket (3) is fixedly mounted on the top of the valve body (1); A pneumatic actuator (4), wherein the pneumatic actuator (4) is arranged on the top of the bracket (3); A valve stem (5), wherein the valve stem (5) is fixedly connected to the top of the ball core (2) and penetrates the bracket (3) and extends to the inside of the pneumatic actuator (4), and the pneumatic actuator (4), the valve stem (5) and the ball core (2) cooperate with each other to realize the opening and closing of the valve body (1); A pneumatic cleaning mechanism (6), wherein the pneumatic cleaning mechanism (6) moves up and down in the ball core (2) under the control of the pneumatic actuator (4) to clean the inside of the ball core (2); Gas is introduced into the cylinder of the pneumatic actuator (4) through an external air pressure source, and the air pressure in the cylinder increases, causing the piston in the cylinder to move toward both sides of the cylinder. Since racks are fixedly installed on the opposing surfaces of the pistons on both sides of the cylinder, and teeth that cooperate with the racks are provided on the valve stem (5), when the piston moves toward both sides of the cylinder, the rack on the piston drives the valve stem (5) to rotate, and the valve stem (5) drives the ball core (2) to rotate. During the rotation of the ball core (2), the valve body (1) changes from being on to being off. Similarly, gas is pumped into the cylinder of the pneumatic actuator (4) through an external air pressure source, and the air pressure in the cylinder decreases, causing the piston in the cylinder to move toward the middle of the cylinder. During the movement of the piston, the rack drives the valve stem (5) to rotate, and then drives the ball core (2) to rotate. During the rotation of the ball core (2), the valve body (1) changes from being off to being on. The pneumatic cleaning mechanism (6) comprises: A first cavity (61), wherein the first cavity (61) is disposed inside the bracket (3); A first pipe (62), the first pipe (62) runs through the interior of the bracket (3) and connects the first cavity (61) with the interior of the cylinder of the pneumatic actuator (4); A second cavity (63), the second cavity (63) is opened inside the valve stem (5) and communicates with the interior of the ball core (2); A first groove (64), the first groove (64) is formed on the valve stem (5), the first groove (64) corresponds to the first cavity (61) and communicates with the second cavity (63); A piston rod (65), wherein the piston rod (65) is slidably mounted in the second chamber (63); A telescopic rod (66), the telescopic rod (66) consisting of a cylinder, a rod body and a No. 1 spring (661), the cylinder of the telescopic rod (66) being horizontally fixedly mounted on the bottom of the piston rod (65), the interior of the cylinder of the telescopic rod (66) being fixedly mounted with the No. 1 spring (661), one end of the No. 1 spring (661) being fixedly connected to the inner surface of the side wall of the cylinder of the telescopic rod (66) close to the piston rod (65), and the other end of the No. 1 spring (661) being fixedly connected to one end of the rod body of the telescopic rod (66) close to the piston rod (65); one end of the rod body of the telescopic rod (66) away from the piston rod (65) is rotatably connected to the No. 1 scraper rod (662); A No. 2 spring (651) is fixedly connected between the top of the piston rod (65) and the top of the No. 2 chamber (63); a No. 1 channel (31) is provided on the bracket (3); a No. 2 channel (51) is provided on the valve stem (5); and the No. 2 channel (51) is communicated with the No. 2 chamber (63); A solenoid valve (621) is fixedly arranged inside the No. 1 pipe (62), and a No. 3 channel (611) is opened on the side of the No. 1 cavity (61) away from the valve stem (5).

2. A self-cleaning pneumatic valve according to claim 1, characterized in that: The vertical cross-section of the first scraper rod (662) is triangular.

3. A self-cleaning pneumatic valve according to claim 1, characterized in that: The horizontal cross section of the No. 1 groove (64) is a sector with a central angle of 90 degrees. On the horizontal cross section of the valve stem (5), the angle between a line a connecting the No. 2 channel (51) and the center axis of the valve stem (5) and a line b connecting the point on the No. 1 groove (64) closest to the No. 2 channel (51) and the center axis of the valve stem (5) is 90 degrees.

4. A self-cleaning pneumatic valve according to claim 1, characterized in that: A push rod (652) is fixedly mounted on the top of the piston rod (65).

5. A self-cleaning pneumatic valve according to claim 1, characterized in that: One end of the telescopic rod (66) away from the piston rod (65) is rotatably connected to a first rod (663) and a second rod (664); the first rod (663) is located above the telescopic rod (66), and the second rod (664) is located below the telescopic rod (66); and one end of the first rod (663) and the second rod (664) away from the telescopic rod (66) are rotatably connected to a second scraping rod (665) respectively.

6. A self-cleaning pneumatic valve according to claim 1, characterized in that: A torsion spring is provided at the connection between the first rod (663), the second rod (664) and the telescopic rod (66).

7. A method for using a self-cleaning pneumatic valve, using the self-cleaning pneumatic valve according to claim 6, characterized in that: The method of use comprises the following steps: S1: The valve body (1) is installed in the pipeline, and gas is introduced into the cylinder of the pneumatic actuator (4) through an external air pressure source. The air pressure in the cylinder increases, causing the piston in the cylinder to move toward the two sides of the cylinder. The rack on the piston drives the valve stem (5) to rotate, and the valve stem (5) drives the ball core (2) to rotate. During the rotation of the ball core (2), the valve body (1) changes from being open to being closed. Similarly, gas is pumped into the cylinder of the pneumatic actuator (4) through an external air pressure source. The air pressure in the cylinder decreases, causing the piston in the cylinder to move toward the middle of the cylinder. During the movement of the piston, the rack drives the valve stem (5) to rotate, thereby driving the ball core (2) to rotate. During the rotation of the ball core (2), the valve body (1) changes from being closed to being open. S2: When the valve body (1) needs to be closed, gas is introduced into the cylinder body through the pneumatic actuator (4), and the gas enters the No. 1 chamber (61) through the No. 1 pipe (62), and then enters the No. 1 groove (64) from the No. 1 chamber (61). The gas enters the No. 2 chamber (63) from the No. 1 groove (64). The air pressure in the No. 2 chamber (63) increases, pushing the piston rod (65) to move downward. During the downward movement of the piston rod (65), the telescopic rod (66) is driven to move downward. The end of the telescopic rod (66) away from the piston rod (65) is rotatably connected to the No. 1 scraper rod (662). The No. 1 scraper rod (662) always fits the inner wall of the ball core (2). During the downward movement of the piston rod (65), the No. 1 scraper rod (662) scrapes off the scale on the inner wall of the ball core (2); S3: When the ball core (2) always keeps the valve body (1) in the conducting state, or when in the conducting state, impurities in the water accumulate in the ball core (2), causing the valve body (1) to be blocked, at this time, the solenoid valve (621) is closed, and the No. 3 channel (611) is opened. The external air pressure source through the No. 3 channel (611) causes the No. 2 chamber (63) to be filled with and exhausted with air repeatedly, driving the piston rod (65), the telescopic rod (66) and the No. 1 scraper rod (662) to reciprocate up and down, reciprocatingly scraping the inner wall of the ball core (2) to clean the scale; at the same time, the piston rod (65), the telescopic rod (66) and the No. 1 scraper rod (662) reciprocate up and down, cooperating with the flow of water to clear the inside of the ball core (2), thereby reducing the accumulation of impurities in the water in the ball core (2).

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