Pressurizing sealing dome clock valve

Abstract

The utility model discloses a pressurized sealing dome clock valve which comprises a dome clock valve body, an execution element is installed on one side of the dome clock valve body, a spherical valve element is installed in the dome clock valve body, a rubber sealing ring corresponding to the spherical surface of the top of the spherical valve element is arranged at the closed position of the dome clock valve body, and the rubber sealing ring is of an inflation and deflation design. The execution element is used for driving the spherical valve element to rotate to conduct closing and opening operation. By means of inflatable setting of the rubber sealing ring, the problems that in an existing pneumatic conveying system, solid particles are attached to a sealing face in the cutting-off process, abrasion is caused in the using process of a valve seat and the sealing face, sealing is not tight, and internal leakage is serious are solved, and meanwhile no air cylinder exists. And the three-way mechanical slide valve, the swing arm and the adjusting screw are adopted for driving, so that the use is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of dome clock valve design, specifically to a pressure sealing dome clock valve. BACKGROUND

[0002] The pressure sealing dome clock valve is a fast-closing device for conveying solid materials by gas, and serves to open and separate the pipeline space. It is suitable for the sealing conveying system of loose, dry and non-sticky flowable solid materials, especially for the ash handling system of thermal power plants and the coal injection system of steel plants, and for gas conveying. According to different applications, the pressure sealing dome clock valve is made of different materials and is subjected to different hardening treatments on the surface. The smooth and hard surface of the valve core can ensure good tight contact with the rubber sealing ring to ensure reliable sealing. The rubber sealing ring is made of special rubber and has the characteristics of high temperature resistance and aging resistance, and a long service life. When the valve is opened, the material port is fully open and the resistance is low.

[0003] In the existing pneumatic conveying system, solid particles adhere to the sealing surface during the cutting process, causing wear of the valve seat and the sealing surface during use, resulting in poor sealing and serious internal leakage. In addition, most dome valves are designed as a whole, making maintenance difficult.

[0004] Therefore, in view of the above problems, the applicant proposes a pressure sealing dome clock valve to solve the above problems. SUMMARY

[0005] The utility model aims at providing a pressure sealing dome clock valve to solve the problems raised in the background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a pressure sealing dome clock valve, comprising a dome clock valve body, an actuator is installed on one side of the dome clock valve body, a spherical valve core is installed inside the dome clock valve body, and a rubber sealing ring corresponding to the top spherical surface of the spherical valve core is arranged at the closed position of the dome clock valve body. The rubber sealing ring is designed for inflation and deflation. The actuator is used to drive the rotation of the spherical valve core for closing and opening operation, and the actuator inflates the rubber sealing ring during the closing process of the spherical valve core and deflates the rubber sealing ring when the spherical valve core is opened.

[0007] Further, the actuator comprises a drive box body installed on the side wall of the dome clock valve body, a linear cylinder is installed at the opening of one side of the drive box body, a swing arm is installed on the telescopic end inside the drive box body, the swing arm is rotatably connected inside the drive box body, and the swing arm is connected to the rotating shaft of the spherical valve core at the connection point.

[0008] Further, the swing arm is provided with an adjusting screw, and a two-position three-way motorized slide valve is arranged in the driving box, and the adjusting screw can press the top rod arranged on the two-position three-way motorized slide valve.

[0009] Further, the two-position three-way motorized slide valve is provided with three connection ports, including an air inlet port, a working port and an exhaust port, and the three connection ports are connected through the switching valve core of the two-position three-way motorized slide valve to realize the connection or disconnection of the air flow, wherein the air inlet port is connected with the air port of the rubber sealing ring through the air channel of the driving box and the dome valve body.

[0010] The position of the valve core of the two-position three-way motorized slide valve is controlled by pressing and releasing the top rod, so as to change the flow direction of the air flow.

[0011] Further, the gap between the spherical valve core and the rubber sealing ring is 0.4-2mm during the opening and closing process of the dome valve body.

[0012] Further, the working pressure of the linear air cylinder is 0.4MCA-0.6MCA, the inflation pressure of the rubber sealing ring is 0.4MCA-0.6MCA and is higher than the conveying pressure by 0.15MCA.

[0013] Further, the dome valve body comprises a valve body, a top cover and a tray, the spherical valve core and the rubber sealing ring are arranged in the valve body, the top cover and the tray are communicated with the valve body and are connected through flanges and bolts, the top cover is used for receiving materials at the upper end, and the tray is used for discharging at the lower end.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] 1. The utility model discloses a rubber sealing ring is set up by inflation, solves the solid particle adhesion on the sealing surface in the cutting process in the existing pneumatic conveying system, causes the wear of valve seat and sealing surface to appear in use, thereby the phenomenon of sealing is not strict, and the serious internal leakage appears, and the utility model discloses a three-way motorized slide valve, a swing arm and an adjusting screw are used to drive instead of a cylinder, and the utility model discloses more convenient to use.

[0016] 2. The utility model discloses a three-section type of the pressure charging sealing dome valve, and the modular installation is convenient to maintain, and the weight is only one third of the weight of the traditional clock valve, and the valve core can be replaced only usually, and the utility model discloses more convenient to maintain. DRAWINGS

[0017] Fig. 1 It is the whole front view structure schematic diagram of the utility model;

[0018] Fig. 2 It is the whole front view structure schematic diagram of the utility model;

[0019] Fig. 3 It is a schematic diagram of the overall side structure of the utility model.

[0020] In the figure: 1. Dome bell valve body; 11. Valve body; 12. Top cover; 13. Tray; 14. Spherical valve core; 15. Rubber sealing ring; 2. Actuator; 21. Drive box; 22. Swing arm; 23. Linear cylinder; 24. Adjusting screw; 25. Two-position three-way motorized slide valve; 251. Push rod. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] like Figs. 1-3 As shown, a pressurized sealed dome bell valve comprises a dome bell valve body 1, an actuator 2 is mounted on one side of the dome bell valve body 1, a hemispherical spherical valve core 14 is mounted inside the dome bell valve body 1, and a rubber sealing ring 15 is provided at the closed position of the dome bell valve body 1 corresponding to the top spherical surface of the spherical valve core 14, the rubber sealing ring 15 is designed for inflation and deflation, the actuator 2 is used to close and open the spherical valve core 14 by rotating the spherical valve core 14, and the actuator 2 inflates the rubber sealing ring 15 when the spherical valve core 14 is closed, and inflates the rubber sealing ring 15 when the spherical valve core 14 is opened;

[0023] The execution element 2 includes a drive box 21 mounted on the side wall of the dome clock valve body 1, a linear cylinder 23 is mounted at the opening of one side of the drive box 21, the telescopic end inside the drive box 21, the telescopic end can be understood as a pneumatic actuator, a swing arm 22 is mounted on the pneumatic actuator, the swing arm 22 is rotationally connected inside the drive box 21, and the rotation joint point is connected with the rotation shaft of the spherical valve core 14, an adjusting screw 24 is mounted on one side of the swing arm 22, a two-position three-way motorized spool valve 25 is mounted inside the drive box 21, the adjusting screw 24 can press the top rod of the three-way motorized spool valve 25 by swinging, the two-position three-way motorized spool valve 25 is a conventional design, which has three connection ports, generally including an air inlet port C, a working port A and an exhaust port B, through the switching action of the two-position three-way motorized spool valve 25, the internal valve core position is changed to realize the connection or disconnection of the gas flow, in the initial state, the stable position of the spool valve may be that the C port communicates with the A port and the B port is closed, at this time, according to the needs of the system, the gas source may supply gas to the working port A through the C port, or exhaust gas from the working port A to the B port depending on the initial position of the spool valve, when it is necessary to change the path of the gas flow, a mechanical force such as the adjusting screw 24 on the swing arm 22 will act on the two-position three-way motorized spool valve 25 to switch it from the current position to another position. During the switching process, the sealing surface of the two-position three-way motorized spool valve 25 will move away from or contact the corresponding connection port, thereby changing the direction of the gas flow, after the switching is completed, the two-position three-way motorized spool valve 25 will be in a new stable position, such as the C port communicating with the B port and the A port being closed, at this time, the path of the gas flow has been changed to meet the new requirements of the system, in this scheme, the air inlet port C is connected with the air passage of the drive box 21 and the dome clock valve body 1, which is a conventional design, the air ports connected with the rubber sealing ring 15 are not all shown in the figure, and the switching action of the two-position three-way motorized spool valve 25 is realized by some mechanical force such as external force, spring force or electromagnetic force, and in this case, the motor is driven by pressing the top rod 251 of the two-position three-way motorized spool valve 25 with the adjusting screw 24 on the swing arm 22 to switch the spool valve, the main function of the top rod 251 is to transmit mechanical force to control the position of the valve core of the two-position three-way motorized spool valve 25, thereby changing the direction of the gas flow, i.e. the switching action is pressing the top rod 251 and releasing the top rod 251.

[0024] As can be seen from the above, when the spherical valve core 14 is in the closed position, the adjusting screw 24 on the swing arm 22 presses the top rod 251 of the two-position three-way motorized spool valve 25, so that the gas source supplies gas to the rubber sealing ring 15 through the C port, at this time, the gas flow between the A port and the B port is cut off, forming a reliable seal, and the pressure gauge shows the pressure acting on the rubber sealing ring 15.

[0025] When the spherical valve core 14 needs to be opened, the moment the linear cylinder 23 starts to act, the adjusting screw 24 on the swing arm 22 is separated from the top rod 251 of the two-position three-way motor slide valve 25, at this time, the two-position three-way motor slide valve 25 switches to the exhaust position, and the gas in the rubber sealing ring 15 is discharged through the B port. With the discharge of the gas, the spherical valve core 14 starts to rotate, and in the process of rotation, the spherical valve core 14 is not in contact with the rubber sealing ring 15.

[0026] In the closing process, the linear cylinder 23 starts to act in reverse, and when the spherical valve core 14 rotates to the half-closed state, the adjusting screw on the swing arm presses the top rod 251 of the two-position three-way motor slide valve 25 again. At this time, the two-position three-way motor slide valve 25 switches to the gas supply position, and the gas source supplies gas to the rubber sealing ring 15 through the C port again. With the filling of the gas, the rubber sealing ring 15 expands and tightly presses on the spherical valve core 14, forming a new seal. The time between closing and filling is completed by adjusting the screw 24. It is noted that the working pressure of the linear cylinder 23 is 0.4MCA-0.6MCA, the inflation pressure of the rubber sealing ring 15 is 0.4MCA-0.6MCA and higher than the conveying pressure 0.15MCA.

[0027] The dome clock valve body 1 includes a valve body 11, a top cover 12 and a tray 13, the spherical valve core 14 and the rubber sealing ring 15 are located in the valve body 11, the top cover 12 and the tray 13 are communicated with the valve body 11 and are connected by flanges and bolts, the top cover 12 is used for receiving materials at the upper end, and the tray 13 is used for discharging at the lower end. By dividing the dome clock valve body 1 into three sections, modular installation is convenient for maintenance, the weight is only one third of the weight of the traditional clock valve, and only the spherical valve core 14 needs to be replaced in normal times. The actuator 2 is installed on one side of the valve body 11.

[0028] The dome clock valve body 1 with pressure sealing keeps a gap of about 0.4-2mm between the spherical valve core 14 and the rubber sealing ring 15 during opening and closing.

[0029] Working principle: The pneumatic actuator drives the spherical valve core 14 to rotate through the swing arm 22, so that the spherical valve core 14 and the rubber sealing ring 15 can move in contact, the purpose is to make the spherical valve core 14 and the rubber sealing ring 15 not to produce friction and reduce wear. The pneumatic actuator of the pressure sealing type ball valve is a dual-purpose linear cylinder 23, which drives the dome valve spherical valve core 14 to rotate through the swing arm 22. When the dome clock valve body 1 is in the closed state, the rubber sealing ring 15 inflates and expands tightly on the spherical valve core 14, thereby forming a very reliable sealing ring, which prevents the flow of materials in the pipeline.

[0030] This is the working principle of the kind of pressure sealing dome clock valve, in general, the working process of the dome clock valve body 1 is: closing (rubber sealing ring 15 inflation) → closing (rubber sealing ring 15 exhaust) → valve core 14 rotation → full open (rubber sealing ring 15 not inflation) → valve core 14 rotation → closing (rubber sealing ring 15 not inflation) → closing (rubber sealing ring 15 inflation), complete a cycle, note that two three-way motorized slide valve 25 is prior art, there are many kinds of work and installation way in practical application, this case is only one of them is described, here is not too much to say.

[0031] Embodiments of the present application are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the application to the forms disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments were chosen and described in order to best explain the principles of the application and its practical application, and to enable others skilled in the art to understand the application for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A pressurized seal dome clock valve comprising a dome clock valve body (1), characterized in that: The dome clock valve body (1) is provided with an actuator (2) on one side, a spherical valve core (14) is arranged inside the dome clock valve body (1), and a rubber sealing ring (15) corresponding to the top spherical surface of the spherical valve core (14) is arranged at the closed position of the dome clock valve body (1); the rubber sealing ring (15) is designed to be inflatable; the actuator (2) is used to drive the rotation of the spherical valve core (14) to perform closing and opening operations, and the actuator (2) inflates the rubber sealing ring (15) during the closing process of the spherical valve core (14) and deflates the rubber sealing ring (15) during the opening process of the spherical valve core (14).

2. A pressurized seal dome clock valve according to claim 1, wherein, The actuator (2) comprises a drive box (21) arranged on the side wall of the dome clock valve body (1); a linear cylinder (23) is arranged at the opening of one side of the drive box (21); a swing arm (22) is arranged on the telescopic end inside the drive box (21); the swing arm (22) is rotatably connected inside the drive box (21), and the swing arm (22) is connected to the rotating shaft of the spherical valve core (14).

3. A pressurized seal dome clock valve according to claim 2, wherein, An adjusting screw (24) is arranged on one side of the swing arm (22); a two-position three-way motorized slide valve (25) is arranged inside the drive box (21); the adjusting screw (24) can press a jacking rod (251) arranged on the two-position three-way motorized slide valve (25) by swinging.

4. A pressurized seal dome clock valve according to claim 3, wherein, The two-position three-way motorized slide valve (25) has three connection ports, including an air inlet port, a working port and an air outlet port; the three connection ports are connected or disconnected by switching the valve core position of the two-position three-way motorized slide valve (25); the air inlet port is connected to the air port of the rubber sealing ring (15) through the air channel connecting the drive box (21) and the dome clock valve body (1); The jacking rod (251) controls the position of the valve core of the two-position three-way motorized slide valve (25) by pressing and releasing, so as to change the flow direction of the air flow.

5. A pressurized seal dome clock valve according to claim 4, wherein, During the opening and closing process of the dome clock valve body (1), a gap of 0.4-2mm is maintained between the spherical valve core (14) and the rubber sealing ring (15).

6. A pressurized seal dome clock valve according to claim 2, wherein, The working pressure of the linear cylinder (23) is 0.4MCA-0.6MCA, the inflation pressure of the rubber sealing ring (15) is 0.4MCA-0.6MCA, and the inflation pressure is 0.15MCA higher than the delivery pressure.

7. A pressurized seal dome clock valve according to claim 1, wherein, The dome clock valve body (1) comprises a valve body (11), a top cover (12) and a tray (13); the spherical valve core (14) and the rubber sealing ring (15) are arranged in the valve body (11); the top cover (12) and the tray (13) are connected to the valve body (11) and are connected by flanges and bolts; the top cover (12) is used for receiving materials at the upper end, and the tray (13) is used for discharging materials at the lower end.

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