CN114811092A - A kind of self-cleaning pneumatic valve and its use method - Google Patents

Abstract

The invention belongs to the technical field of pneumatic valves, in particular to a self-cleaning pneumatic valve and a method of using the same. The self-cleaning pneumatic valve includes 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, gas is introduced into the cylinder through the pneumatic actuator, the gas enters the No. 1 cavity through the No. 1 pipe, and then enters the No. 1 slot from the No. 1 cavity, and the gas enters the No. 1 slot No. 2 cavity, the air pressure in the No. 2 cavity increases, which pushes the piston rod to move down. During the process of the piston rod moving down, it drives the telescopic rod to move down. The end of the telescopic rod away from the piston rod rotates and connects to the No. 1 scraping rod. , the No. 1 scraping rod is always in contact with the inner wall of the ball core. During the downward movement of the piston rod, the No. 1 scraping rod scrapes the scale on the inner wall of the ball core.

Description

A kind of self-cleaning pneumatic valve and its use method

technical field

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

Background technique

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. The pneumatic valve uses compressed air to push the movement of multiple sets of combined pneumatic pistons in the actuator, and transmits force to the characteristics of the beam and the inner curved track, driving the hollow spindle to rotate, and the compressed air is transmitted to each cylinder to change the position of the air inlet and outlet to change The rotation direction of the main shaft, 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.

Pneumatic ball valve is a kind of pneumatic valve. Pneumatic ball valve only needs to use the pneumatic actuator to rotate the air source by 90 degrees and a small torque to close tightly. The completely equal valve body cavity provides a low resistance, straight-through flow path for the medium. It is generally considered that the ball valve is most suitable for direct opening and closing. The main feature of the ball valve is its compact structure and easy operation; the ball valve body can be integral or combined.

However, in the process of using the pneumatic ball valve, the internal ball core channel will often produce scale or have impurities attached over time. These scales or impurities are not cleaned on the ball core channel, and the accumulation will cause the ball core channel blockage. , and then cause the pneumatic ball valve to lose its function; however, the daily maintenance and cleaning of the pneumatic ball valve usually needs to be disassembled, which undoubtedly increases the workload and is cumbersome.

In view of this, the present invention solves the above-mentioned technical problems by providing a self-cleaning pneumatic valve and a method for using the same.

SUMMARY OF THE INVENTION

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 the pneumatic ball valve, the present invention provides a self-cleaning pneumatic valve and a method for using the same.

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

S1: The valve body is installed in the pipeline, and gas is introduced into the cylinder of the pneumatic actuator through the external air pressure source, and the air pressure in the cylinder increases, so that the piston in the cylinder moves to both sides of the cylinder, and the upper The rack 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; in the same way, the gas is pumped into the cylinder of the pneumatic actuator through the external air pressure source. The air pressure in the cylinder drops, 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, which in turn drives the ball core to rotate. During the rotation of the ball core, the valve body rotates. from off to on;

S2: When the valve body needs to be closed, the gas is introduced into the cylinder through the pneumatic actuator, the gas enters the No. 1 cavity through the No. 1 pipe, and then enters the No. 1 groove from the No. 1 cavity, and the gas enters the No. 2 cavity from the No. 1 groove. , the air pressure in the No. 2 cavity rises, pushing the piston rod to move down, during the process of the piston rod moving down, it drives the telescopic rod to move down, and the end of the telescopic rod away from the piston rod rotates and connects to No. 1 scraping rod, No. 1 The scraping rod is always in contact with the inner wall of the ball core. During the downward movement of the piston rod, the No. 1 scraping rod scrapes the scale on the inner wall of the ball core;

S3: When the ball core always keeps the valve body in the conduction state, or in the conduction state, impurities in the water accumulate in the ball core, causing the valve body to be blocked. At this time, close the solenoid valve and open the No. 3 channel , Through the external air pressure source of No. 3 channel, the air is frequently reciprocated into and out of the No. 2 cavity, driving the piston rod, the telescopic rod and the No. 1 scraping rod to reciprocate up and down, scraping the inner wall of the ball back and forth, cleaning At the same time, the piston rod, telescopic rod and No. 1 scraping rod move back and forth up and down, and cooperate 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.

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:

valve body;

a ball core, which is movably arranged inside the valve body;

a bracket, the bracket is fixedly installed on the top of the valve body;

a pneumatic actuator, the pneumatic actuator is arranged on the top of the bracket;

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

The pneumatic cleaning mechanism moves up and down in the spherical core through the control of the pneumatic actuator to clean the interior of the spherical core.

Preferably, the pneumatic cleaning mechanism includes:

No. 1 cavity, the No. 1 cavity is opened inside the bracket;

No. 1 pipe, the No. 1 pipe runs through the inside of the bracket and communicates with the No. 1 cavity and the inside of the cylinder of the pneumatic actuator;

No. 2 cavity, the No. 2 cavity is opened inside the valve stem and communicates with the inside of the ball core;

No. 1 slot, the No. 1 slot is opened on the valve stem, and the No. 1 slot corresponds to the No. 1 cavity and communicates with the No. 2 cavity;

a piston rod, which is slidably installed in the No. 2 cavity;

The telescopic rod is composed of a cylinder body, a rod body and a No. 1 spring. The cylinder body of the telescopic rod is horizontally and fixedly installed at the bottom of the piston rod, and 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 the end of the telescopic rod body close to the piston rod; the telescopic rod body is far from the piston rod. One end is rotated and connected to a No. 1 scraping rod.

Preferably, the vertical section of the No. 1 scraping rod is triangular.

Preferably, a No. 2 spring is fixedly connected between the top of the piston rod and the top of the No. 2 cavity, a No. 1 channel is opened on the bracket, a No. 2 channel is opened on the valve stem, and the No. 2 channel is connected with the No. 2 channel. The second chamber is connected.

Preferably, the horizontal section of the No. 1 slot is a sector with a central angle of 90 degrees; on the horizontal section of the valve stem, the connecting line a between the No. 2 channel and the central axis of the valve stem, and the No. 1 slot is away from the No. 2 The angle between the closest point of the channel and the connecting line b, a and b of the central axis of the valve stem is 90 degrees.

Preferably, a solenoid valve is fixed inside the No. 1 tube, and a No. 3 channel is opened on the side of the No. 1 cavity away from the valve stem.

Preferably, a top rod is fixedly installed on the top of the piston rod.

Preferably, one end of the telescopic rod away from the piston rod is rotatably connected to a No. 1 rod and a No. 2 rod, the No. 1 rod is located above the telescopic rod, the No. 2 rod is located below the telescopic rod, and the No. 1 rod is connected to the No. 1 rod. One end of the No. 2 rod away from the telescopic rod is respectively rotatably connected with No. 2 scraping rods.

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

The beneficial effects of the present invention are as follows:

1. A self-cleaning pneumatic valve according to the present invention and its use method, when the valve body needs to be closed, gas is introduced into the cylinder through the pneumatic actuator, and the gas enters the first cavity through the No. The No. 1 cavity enters the No. 1 groove, the gas enters the No. 2 cavity from the No. 1 groove, the air pressure in the No. 2 cavity rises, and pushes the piston rod to move down. The end of the telescopic rod away from the piston rod is rotated and connected to the No. 1 scraping rod. The No. 1 scraping rod is always in contact with the inner wall of the ball core. During the downward movement of the piston rod, the No. 1 scraping rod scrapes the scale on the inner wall of the ball core. remove.

2. A self-cleaning pneumatic valve and a method of using the same according to the present invention, when the ball core always keeps the valve body in a conducting state, or in the conducting state, impurities in the water accumulate in the ball core, resulting in When the valve body is blocked, at this time, close the solenoid valve and open the No. 3 channel. Through the external air pressure source of the No. 3 channel, the air is frequently reciprocated into and out of the No. 2 cavity, driving the piston rod, the telescopic rod and the No. 1 scraper. The moving rod reciprocates up and down to scrape the inner wall of the ball core and clean the scale; at the same time, the piston rod, the telescopic rod and the No. 1 scraping rod move back and forth up and down, and cooperate with the flow of water to dredge the inside of the ball core, reducing the The impurities in the water accumulate in the core.

Description of drawings

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

Fig. 1 is the method flow chart of the use method of the present invention;

2 is a perspective view of a pneumatic valve in the present invention;

Fig. 3 is the sectional view of pneumatic valve in the present invention;

Fig. 4 is the side sectional view of the internal structure of the pneumatic actuator in the present invention;

Fig. 5 is a partial enlarged view at A of Fig. 3;

Fig. 6 is a partial enlarged view at B of Fig. 3;

Fig. 7 is the positional relationship diagram of the valve stem relative to the bracket when the pneumatic valve of the present invention is opened;

8 is a positional relationship diagram of the valve stem relative to the bracket when the pneumatic valve of the present invention is closed;

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

Detailed ways

In order to make it easy to understand the technical means, creation features, achieved goals and effects of the present invention, the present invention will be further described below with reference to the specific embodiments.

As shown in Fig. 1 to Fig. 8, a method of using a self-cleaning pneumatic valve according to the present invention, the method of using comprises the following steps:

S1: Install the valve body 1 in the pipeline, and pass gas into the cylinder of the pneumatic actuator 4 through the external air pressure source, and the air pressure in the cylinder increases, so that the piston in the cylinder 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 on to off; in the same way, through the external air pressure source to the pneumatic actuator The gas in the cylinder of 4 is pumped, and the air pressure in the cylinder drops, so that the piston in the cylinder moves to the middle part of the cylinder. During the movement of the piston, the rack drives the valve stem 5 to rotate, which in turn drives the ball core 2 to rotate. During the rotation of the ball core 2, the valve body 1 changes from being closed to conducting;

S2: When the valve body 1 needs to be closed, gas is introduced into the cylinder through the pneumatic actuator 4, the gas enters the No. 1 cavity 61 through the No. 1 pipe 62, and then enters the No. 1 groove 64 from the No. 1 cavity 61. The number slot 64 enters the No. 2 cavity 63, the air pressure in the No. 2 cavity 63 rises, and pushes 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, and the telescopic rod 66 is far away from the piston. One end of the rod 65 is rotatably connected with a No. 1 scraping rod 662, and the No. 1 scraping 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 scraping rod 662 pushes the inner wall of the ball core 2. Scrape off the scale or impurities;

S3: When the ball core 2 always keeps the valve body 1 in the conducting state, or 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, close the solenoid valve 621, And open the No. 3 channel 611, through the external air pressure source of the No. 3 channel 611, make frequent reciprocating filling and extracting air into the No. 2 cavity 63, driving the piston rod 65, the telescopic rod 66 and the No. 1 scraping rod 662 to reciprocate up and down. , scrape 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 scraping rod 662 reciprocate up and down, and cooperate with the flow of water to dredge the interior of the ball core 2, reducing the Impurities in the water accumulate in the core 2 .

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:

valve body 1;

The ball core 2, the ball core 2 is movably arranged inside the valve body 1;

A bracket 3, the bracket 3 is fixedly installed on the top of the valve body 1;

a pneumatic actuator 4, the pneumatic actuator 4 is arranged on the top of the bracket 3;

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 valve body 1 open and close;

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

When working, 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 (external air pressure source). The air inlet in the cylinder is located in the middle of the cylinder), the air pressure in the cylinder rises, so that the piston in the cylinder moves to both sides of the cylinder. 5 is provided with teeth that cooperate with the rack, so 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. , the valve body 1 changes from on to off; in the same way, the gas is pumped into the cylinder of the pneumatic actuator 4 through the external air pressure source, and the air pressure in the cylinder drops, so that the piston in the cylinder moves to the middle of the cylinder. , During the movement of the piston, the rack drives the valve stem 5 to rotate, which in turn drives the ball core 2 to rotate. During the rotation of the ball core 2, the valve body 1 turns from closed to on; turn off and turn on;

However, in use, the sidewall of the inner channel of the valve body 1 ball core 2 will condense with scale or impurities over time, so a pneumatic cleaning mechanism 6 is provided, and the pneumatic cleaning mechanism 6 is controlled by the pneumatic actuator 4 in the ball core 2. The inner up and down movement realizes the cleaning of the inside of the ball core 2 .

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

No. 1 cavity 61, the No. 1 cavity 61 is opened inside the bracket 3;

No. 1 pipe 62, the No. 1 pipe 62 runs through the inside of the bracket 3 and communicates with the No. 1 cavity 61 and the inside of the cylinder of the pneumatic actuator 4;

The No. 2 cavity 63, the No. 2 cavity 63 is opened inside the valve stem 5 and communicates with the inside of the ball core 2;

The No. 1 slot 64, the No. 1 slot 64 is opened on the valve stem 5, and the No. 1 slot 64 corresponds to the No. 1 cavity 61 and communicates with the No. 2 cavity 63;

The piston rod 65, the piston rod 65 is slidably installed in the No. 2 cavity 63;

The telescopic rod 66 is composed of a cylinder body, a rod body and a No. 1 spring 661. The cylinder body of the telescopic rod 66 is horizontally and fixedly installed at the bottom of the piston rod 65, and the interior of the cylinder body of the telescopic rod 66 is fixedly installed. There is a No. 1 spring 661, one end of the No. 1 spring 661 is fixedly connected with the inner surface of the side wall of the cylinder body of the telescopic rod 66 close to the piston rod 65, and the other end of the No. 1 spring 661 is close to the rod body slidably connected in the telescopic rod 66. One end of the piston rod 65 is fixedly connected; the end of the telescopic rod 66 away from the piston rod 65 is rotatably connected to a scraping rod 662 .

During operation, if the valve body 1 is in the conducting state for a long time in advance, the inner wall of the ball core 2 is easy to condense scale, and the accumulation of scale affects the use of the ball core 2; The gas is introduced 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, which in turn drives the ball core 2 to rotate, so that the valve body 1 is closed; In the process of introducing the gas, the gas enters the No. 1 cavity 61 through the No. 1 pipe 62, and then enters the No. 1 slot 64 from the No. 1 cavity 61, and the gas enters the No. 2 cavity 63 from the No. 1 slot 64, and the pressure in the No. 2 cavity 63 increases. , push the piston rod 65 to move down, because the telescopic rod 66 is horizontally fixed on the bottom of the piston rod 65, and a No. , moving downward, the end of the telescopic rod 66 away from the piston rod 65 is rotated and connected to a No. 1 scraping rod 662, a No. 1 spring 661 is arranged inside the telescopic rod 66 to enable the telescopic rod 66 to be stretched, and the No. 1 spring 661 is always in a compressed state, That is, the rod body of the telescopic rod 66 can always resist the inner wall of the ball core 2, that is, the No. 1 scraping 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 scraping rod 662 pushes the ball. The scale or impurities on the inner wall of the core 2 are scraped off; the scale or impurities on the inner wall of the ball core 2 are prevented from condensing too thickly, which affects the use of the ball core 2; that is, the above process can automatically control the pneumatic actuator 4 in the process of controlling the rotation of the ball core 2. The cleaning mechanism 6 cleans the inner wall of the ball core 2, so that the ball core 2 can clean the inner wall of the ball core 2 after use.

As a specific embodiment of the present invention, the vertical section of the No. 1 scraping rod 662 is a triangle.

During operation, the vertical section of the No. 1 scraping rod 662 is a triangle, and the No. 1 scraping rod 662 has an inclined surface relative to the side wall of the ball core 2 . This setting makes the No. 1 scraping rod 662 move in the ball core 2 . In the middle, the inner wall of the ball core 2 can be scooped, so that the No. 1 scraping rod 662 can more easily clean the scale or impurities on the inner wall of the ball core 2 .

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 cavity 63, a No. 1 channel 31 is defined on the bracket 3, and the valve rod 5 A second channel 51 is opened on the top, and the second channel 51 communicates with the second cavity 63 .

The horizontal section of the No. 1 slot 64 is a sector with a central angle of 90 degrees; on the horizontal section of the valve stem 5, the connection line a between the No. 2 passage 51 and the central axis of the valve stem 5, the distance on the No. 1 slot 64 The angle between the closest point of the second channel 51 and the connecting line b, a and b of the central axis of the valve stem 5 is 90 degrees.

During operation, during the rotation of the ball core 2, that is, in the process of the ball core 2 controlling the opening and closing of the valve body 1, the ball core 2 rotates 90 degrees each time, so the horizontal section of the No. 1 slot 64 is set so that the central angle is 90 As shown in Figure 7, when the ball core 2 makes the ball valve in the conductive state, the state of the valve stem 5 is shown in Figure 7. At this time, the No. 1 slot 64 is communicated with the No. 1 cavity 61. When the valve rod 5 When the ball core 2 is rotated to close the valve body 1, since the horizontal section of the No. 1 slot 64 is a sector with a central angle of 90 degrees, the No. 1 slot 64 and the No. 1 cavity 61 are always connected during the rotation of the valve stem 5. , this setting makes the No. 1 cavity 61 always inflate into the No. 2 cavity 63, so that when the valve body 1 is closed, the piston rod 65 can drive down the telescopic rod 66 and the No. 1 scraping rod 662 to scrape the inner wall of the ball core 2 (two The No. 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 Figure 8, at this time, the No. 1 cavity 61 is not communicated with the No. 1 groove 64. , because on the horizontal section of the valve stem 5, the connection line a between the second channel 51 and the central axis of the valve stem 5, the connection line b between the closest point of the first groove 64 from the second channel 51 and the central axis of the valve stem 5, The angle between a and b is 90 degrees, so the second channel 51 communicates with the first channel 31 at this time, and the gas in the second cavity 63 is discharged through the second channel 51 and the first channel 31, and the piston rod 65 Pulled by the No. 2 spring 651, it moves upward to drive the telescopic rod 66 and the No. 1 scraping rod 662 to scrape the inner wall of the ball core 2 again, thereby realizing the secondary cleaning.

As a specific embodiment of the present invention, a solenoid valve 621 is fixed 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 .

During operation, as shown in Figure 3 and Figure 5, when the ball core 2 always keeps the valve body 1 in a conductive state, or in the conductive state, impurities in the water accumulate in the ball core 2, causing the valve body 1 to be blocked. , at this time, close the solenoid valve 621 (under normal conditions, the solenoid valve 621 is always open), and open the No. 3 channel 611 (under normal conditions, the No. 3 channel 611 is closed), through the No. 3 channel 611 outside air pressure The source, such as an air cylinder; makes the No. 2 cavity 63 reciprocate frequently to fill and extract air, drive the piston rod 65, the telescopic rod 66 and the No. 1 scraping rod 662 to reciprocate up and down, and scrape the inner wall of the ball core 2 back and forth, When the ball core 2 is always in the conduction state, the scale has been condensed on the inner wall of the ball core 2; at the same time, the piston rod 65, the telescopic rod 66 and the No. 1 scraping rod 662 reciprocate up and down to match the water. The flow of the spool 2 has a dredging effect on the inside of the ball core 2, which reduces the accumulation of impurities in the ball core 2 and causes the valve body 1 to be blocked.

As a specific embodiment of the present invention, a top rod 652 is fixedly installed on the top of the piston rod 65 .

During operation, a top rod 652 is fixedly installed on the top of the piston rod 65. When the piston rod 65 moves up and down, the top rod 652 moves with the piston rod 65. When the valve body 1 needs to change from the closed state to the conducting state, at this time To control the pneumatic actuator 4, the air pressure in the cylinder decreases, the pistons in the cylinder are close to each other, the rack drives the valve rod 5 to rotate, when the valve rod 5 rotates, the No. 1 slot 64 and the No. 1 cavity 61 are connected again, and the piston rod The air pressure in the area between the top of 65 and the top of No. 2 cavity 63 also drops. The function of setting the ejector rod 652 is to limit the upward movement of the piston rod 65, crush the No. 2 spring 651, and also prevent the piston rod 65 from moving upward all the time. The piston rod 65 blocks the No. 1 slot 64, so that the gas cannot enter the No. 2 cavity 63 through the No. 1 slot 64 during the next operation, thereby ensuring that the device can work normally.

As a specific embodiment of the present invention, one end of the telescopic rod 66 away from the piston rod 65 is rotatably connected to a No. 1 rod 663 and a No. 2 rod 664, the No. 1 rod 663 is located above the telescopic rod 66, and the No. 2 rod The rod 664 is located below the telescopic rod 66 , and the ends of the No. 1 rod 663 and the No. 2 rod 664 away from the telescopic rod 66 are rotatably connected with a No. 2 scraping rod 665 respectively.

As a specific embodiment 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 .

During operation, the end of the telescopic rod 66 away from the piston rod 65 is rotated and connected to the first rod 663 and the second rod 664. The first rod 663 is located above the telescopic rod 66, the second rod 664 is located below the telescopic rod 66, and the first rod 663 The No. 2 scraping rod 665 is rotatably connected to the end of the No. 2 rod 664 away from the telescopic rod 66, and a torsion spring is fixed at the connection between the No. 1 rod 663, the No. 2 rod 664 and the telescopic rod 66. When the No. 1 rod 663 , When the No. 2 scraping rod 665 at the end of the No. 2 rod 664 contacts the inner wall of the core 2, the torsion spring at the connecting part of the No. 1 rod 663 and the No. 2 rod 664 makes the No. 1 rod 663 and No. 2 rod 664 drive the second rod at the end The scraping rod 665 has a tendency to move away from the telescopic rod 66 and squeeze the inner wall of the ball core 2; because the telescopic rod 66 has the shortest length, when the piston rod 65 moves up and down, due to the blocking of the telescopic rod 66, it will hinder the piston rod 65 from continuing Move up or down, that is, the piston rod 65 has a movement stroke, so that the No. 1 scraping 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, a The number rod 663 and the second rod 664 can scrape off the scale or impurities in the scraping blind area; the scraping effect is guaranteed.

The specific workflow is as follows:

If the valve body 1 is in a long-term conduction state in advance, the inner wall of the ball core 2 is easy to condense scale, and the accumulation of scale will affect the use of the ball core 2; when the valve body 1 needs to be closed, gas is introduced into the cylinder through the pneumatic actuator 4 , the air pressure inside the cylinder body rises, the piston moves to both sides of the cylinder body, so that the rack drives the valve stem 5 to rotate, which in turn drives the ball core 2 to rotate, so that the valve body 1 closes; in the above process, gas is introduced into the cylinder body During the process, the gas enters the No. 1 cavity 61 through the No. 1 pipe 62, and then enters the No. 1 slot 64 from the No. 1 cavity 61. The gas enters the No. 2 cavity 63 from the No. 1 slot 64, and the air pressure in the No. 2 cavity 63 increases, pushing the piston. The rod 65 moves downward. Since the telescopic rod 66 is horizontally and fixedly installed at the bottom of the piston rod 65, and a No. 1 spring 661 is fixedly installed inside the telescopic rod 66, the piston rod 65 drives the telescopic rod 66 downward during the downward movement. Move, the end of the telescopic rod 66 away from the piston rod 65 is rotated and connected to a No. 1 scraping rod 662, a No. 1 spring 661 is arranged inside the telescopic rod 66 to enable the telescopic rod 66 to expand and contract, and the No. 1 spring 661 is always in a compressed state, that is, the telescopic rod 66 can always resist the inner wall of the ball core 2, that is, the No. 1 scraping 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 scraping rod 662 removes the scale on the inner wall of the ball core 2. Scraping; avoids excessive condensation of scale on the inner wall of the ball core 2, which affects the use of the ball core 2; in addition, when the ball core 2 always keeps the valve body 1 in the conduction state, or in the conduction state, the impurities in the water are When the ball core 2 accumulates and the valve body 1 is blocked, at this time, close the solenoid valve 621 (in the normal state, the solenoid valve 621 is always open), and open the No. 3 channel 611 (in the normal state, the No. 3 channel 611 is in the open state) Closed state), through the external air pressure source of No. 3 channel 611, such as an air cylinder; make frequent reciprocation to fill and extract air into the No. 2 cavity 63, drive the piston rod 65, the telescopic rod 66 and the No. 1 scraping rod 662 to reciprocate back and forth up and down , Scrape the inner wall of the ball core 2 back and forth to clean up the scale and reduce the scale on the inner wall of the ball core 2 when the ball core 2 is always in the conducting state and the valve body 1 is in a conducting state; The scraping rod 662 reciprocates up and down, and cooperates 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 and causing the valve body 1 to be blocked.

The above-mentioned front, back, left, right, top and bottom are all based on Fig. 2 in the accompanying drawings of the description, and according to the observation angle of the person as a standard, the side of the device facing the observer is defined as the front, and the left side of the observer is defined as the left, And so on.

In the description of the present invention, it should be understood that the terms "center", "portrait", "horizontal", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 operate in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present invention.

The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and modifications fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. A use method of a self-cleaning pneumatic valve is characterized by comprising the following steps: the using method comprises the following steps:

s1: the valve body (1) is arranged in a pipeline, gas is introduced into a cylinder body of the pneumatic actuating mechanism (4) through an external gas pressure source, the gas pressure in the cylinder body rises, a piston in the cylinder body moves towards two sides of the cylinder body, a rack on the piston drives a valve rod (5) to rotate, the valve rod (5) drives a ball core (2) to rotate, and the valve body (1) is turned off from conduction in the rotating process of the ball core (2); similarly, gas is pumped into the cylinder body of the pneumatic actuating mechanism (4) through an external gas pressure source, the gas pressure in the cylinder body is reduced, so that a piston in the cylinder body moves to the middle part of the cylinder body, in the motion process of the piston, the rack drives the valve rod (5) to rotate, and further drives the ball core (2) to rotate, and in the rotation process of the ball core (2), the valve body (1) is switched from off to on;

s2: when the valve body (1) needs to be closed, gas is introduced into the cylinder body through the pneumatic actuator (4), the gas enters the first cavity (61) through the first pipe (62), then enters the first groove (64) from the first cavity (61), the gas enters the second cavity (63) from the first groove (64), the air pressure in the second cavity (63) rises, the piston rod (65) is pushed to move downwards, the telescopic rod (66) is driven to move downwards in the downward movement process of the piston rod (65), one end, far away from the piston rod (65), of the telescopic rod (66) is rotatably connected with a first scraping rod (662), the first scraping rod (662) is always attached to the inner wall of the ball core (2), and in the downward movement process of the piston rod (65), the first scraping rod (662) scrapes scale on the inner wall of the ball core (2);

s3: when the valve body (1) is always in a conducting state by the ball core (2), or in the conducting state, impurities in water are accumulated in the ball core (2) to cause the valve body (1) to be blocked, at the moment, the electromagnetic valve (621) is closed, the third channel (611) is opened, and the air pressure source outside the third channel (611) is used for filling air into and extracting air out of the second cavity (63) frequently in a reciprocating manner, so that the piston rod (65), the telescopic rod (66) and the first scraping rod (662) are driven to reciprocate up and down to scrape the inner wall of the ball core (2) in a reciprocating manner, and scale is cleaned; meanwhile, the piston rod (65), the telescopic rod (66) and the first scraping rod (662) reciprocate up and down to cooperate with the flowing of water to dredge the interior of the ball core (2), so that the accumulation of impurities in the water in the ball core (2) is reduced.

2. A self-cleaning pneumatic valve, characterized by: the self-cleaning, pneumatically actuated valve is adapted for use in the method of claim 1, comprising:

a valve body (1);

the ball core (2), the said ball core (2) is set up in the valve block (1) movably;

the support (3), the said support (3) is fixedly mounted to the top of the valve block (1);

the pneumatic actuating mechanism (4), the said pneumatic actuating mechanism (4) is set up in the top of the support (3);

the valve rod (5) is fixedly connected to the top of the ball core (2) and penetrates through the support (3) to extend into the pneumatic actuating mechanism (4), and the pneumatic actuating mechanism (4), the valve rod (5) and the ball core (2) are mutually matched to realize the opening and closing of the valve body (1);

the pneumatic cleaning mechanism (6) is controlled by the pneumatic actuating mechanism (4) to move up and down in the ball core (2) so as to clean the interior of the ball core (2).

3. A self-cleaning, pneumatically actuated valve as recited in claim 2, wherein: the pneumatic cleaning mechanism (6) comprises:

the first cavity (61), the first cavity (61) is arranged in the support (3);

the first pipe (62) penetrates through the support (3) and is communicated with the first cavity (61) and the interior of a cylinder body of the pneumatic actuating mechanism (4);

the second cavity (63) is formed in the valve rod (5) and communicated with the inside of the ball core (2);

the first groove (64) is formed in the valve rod (5), and the first groove (64) corresponds to the first cavity (61) and is communicated with the second cavity (63);

the piston rod (65), the said piston rod (65) is mounted in the second cavity (63) slidably;

the telescopic rod (66) comprises a barrel body, a rod body and a first spring (661), the barrel body of the telescopic rod (66) is horizontally and fixedly installed at the bottom of the piston rod (65), the first spring (661) is fixedly installed inside the barrel body of the telescopic rod (66), one end of the first spring (661) is fixedly connected with the inner surface of the side wall, close to the piston rod (65), of the barrel body of the telescopic rod (66), and the other end of the first spring (661) is fixedly connected with one end, close to the piston rod (65), of the rod body of the telescopic rod (66); one end of the rod body of the telescopic rod (66) far away from the piston rod (65) is rotatably connected with a first scraping rod (662).

4. A self-cleaning, pneumatically actuated valve as recited in claim 3, wherein: the vertical section of the first scraping rod (662) is triangular.

5. A self-cleaning, pneumatically actuated valve as recited in claim 3, wherein: no. two springs (651) have been linked firmly between the top of piston rod (65) and the top of No. two chamber (63), No. one passageway (31) have been seted up on support (3), No. two passageway (51) have been seted up on valve rod (5), No. two passageway (51) and No. two chamber (63) intercommunication.

6. A self-cleaning, pneumatically actuated valve as recited in claim 5, wherein: the horizontal section of the first groove (64) is a sector with a central angle of 90 degrees; on the horizontal section of the valve rod (5), the connecting line a between the second channel (51) and the central axis of the valve rod (5), the nearest point on the first groove (64) from the second channel (51) and the connecting line b between the central axis of the valve rod (5), and the included angle between the a and the b is 90 degrees.

7. A self-cleaning, pneumatically actuated valve as recited in claim 3, wherein: a solenoid valve (621) is fixedly arranged in the first pipe (62), and a third channel (611) is formed in one side, far away from the valve rod (5), of the first cavity (61).

8. A self-cleaning, pneumatically actuated valve as recited in claim 7, wherein: and the top of the piston rod (65) is fixedly provided with a mandril (652).

9. A self-cleaning, pneumatically actuated valve as recited in claim 3, wherein: one end of the telescopic rod (66) far away from the piston rod (65) is rotatably connected with a first rod (663) and a second rod (664), the first rod (663) is located above the telescopic rod (66), the second rod (664) is located below the telescopic rod (66), and one ends of the first rod (663) and the second rod (664) far away from the telescopic rod (66) are respectively rotatably connected with a second scraping rod (665).

10. A self-cleaning, pneumatically actuated valve as recited in claim 3, wherein: torsion springs are arranged at the joints of the first rod (663), the second rod (664) and the telescopic rod (66).

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