A sealed pneumatic ball valve

Abstract

This utility model relates to the field of ball valves, specifically to a sealed pneumatic ball valve, including a ball valve body for supporting the main body of the pneumatic ball valve opening and closing assembly, a main valve pipe disposed on one side of the ball valve body for guiding water flow through the pneumatic ball valve, and an external mounting flange fixedly installed on the main valve pipe. This utility model includes a mounting flange, an embedded groove, a sealing ring, a buffer groove, a telescopic rod, a cylindrical spring, and a sealing ring. When using this pneumatic ball valve, the main valve pipe can be connected to an external connecting valve pipe via the mounting flange and fixing bolts. The embedded groove and sealing ring add a sealing structure at the connection, further reducing the possibility of leakage at the connection point. Simultaneously, the sealing ring inside the ball valve body, through the extension and retraction of the telescopic rod and cylindrical spring, abuts against the outside of the ball, thus preventing direct frictional contact between the ball and the inside of the ball valve body.

Description

Technical Field

[0001] The utility model relates to the field of ball valves, in particular to a sealed pneumatic ball valve. Background Art

[0002] A ball valve is a valve that uses a ball as an opening and closing part and achieves fluid control through rotation. The ball valve is mainly composed of a ball, a valve seat, a valve stem and a transmission device. The structure of the ball valve is simple and is usually divided into two types: full-through type and through-diameter type. In the full-through ball valve, the ball and the pipe diameter are the same, and the fluid will not be subject to flow resistance when passing through the ball valve. In the through-diameter ball valve, the diameter of the ball is smaller, and the pressure difference of the fluid needs to be overcome to pass through. The pneumatic ball valve is a ball valve equipped with a pneumatic actuator. The specific categories of pneumatic ball valves are: stainless steel pneumatic ball valves, plastic pneumatic ball valves, sanitary pneumatic ball valves, carbon steel pneumatic ball valves, two-way pneumatic ball valves, three-way pneumatic ball valves, and four-way pneumatic ball valves.

[0003] After searching, a pneumatic ball valve with publication number CN216951751U is found, which specifically discloses a pneumatic ball valve, including a valve body and a valve cover, wherein the valve body is fixedly connected to the valve cover by bolts, an upper mounting tube is provided on the upper side of the valve body, a valve stem is installed in the upper mounting tube, a ball is fixedly connected to the lower end of the valve stem, a rotating groove is provided at the bottom of the valve body, a rotating shaft is rotatably connected in the rotating groove, and a ball is fixedly connected to the end of the rotating shaft. The utility model utilizes the rotating shaft and the rotating groove design to support the lower end of the ball, which can reduce the vibration of the ball to a certain extent, and the sliding block can be made close to or away from the valve stem by adjusting the set screw. When the valve stem is clamped between the two sliding blocks, the vibration of the valve stem can be effectively reduced, and the vibration-proof base can be used to effectively reduce the influence of vibration on the ball valve.

[0004] During the use of existing pneumatic ball valves, due to long-term use, the internal ball and the friction between the valve body cause wear, and a gap will appear between the ball and the valve body when the ball is closed, which will cause the pneumatic ball valve in the closed state to leak, etc., and the pneumatic ball valve in the above-mentioned comparative case lacks a method to strengthen the sealing of the pneumatic ball valve itself. Therefore, the pneumatic ball valve that leaks after long-term use not only affects the normal opening and closing use, but also reduces the overall service life.

[0005] Therefore, it is necessary to invent a sealed pneumatic ball valve to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a sealed pneumatic ball valve, which not only reduces the wear of the ball and the ball valve body under long-term use through the installation flange, embedded groove, sealing ring, buffer groove, telescopic rod, cylindrical spring and sealing ring, but also strengthens the sealing of the inside of the ball valve body. Cooperating with the external sealing ring, the pneumatic ball valve has good sealing ability, which ensures the normal opening and closing use of the pneumatic ball valve and prolongs the overall service life. It solves the problem that in the prior art, the pneumatic ball valve in the process of use suffers wear due to friction between the internal ball and the inside of the valve body due to long-term use, and a gap appears between the ball and the valve body when the ball is closed, which causes water leakage in the closed state of the pneumatic ball valve. In the above-mentioned comparative case, the pneumatic ball valve lacks a method for strengthening the sealing of the pneumatic ball valve itself. Therefore, the pneumatic ball valve that leaks under long-term use not only affects the normal opening and closing use, but also reduces the overall service life.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sealed pneumatic ball valve, comprising a ball valve body, used to carry a main body of a pneumatic ball valve opening and closing component;

[0008] The main valve pipe is arranged on one side of the ball valve body and is used to guide the water flow through the pneumatic ball valve. A mounting flange is fixedly installed on the outside of the main valve pipe. An embedded groove is provided inside the mounting flange. A sealing ring is provided inside the embedded groove. A fixing bolt passes through the outside of the mounting flange. One end of the fixing bolt is movably connected to a connecting valve pipe.

[0009] A buffer groove is arranged inside the valve body of the ball valve and is used for connecting and installing a cylindrical spring. A telescopic rod is fixedly installed inside the buffer groove, a cylindrical spring is arranged outside the telescopic rod, a sealing ring is fixedly installed at one end of the cylindrical spring, a sphere is arranged on one side of the sealing ring, and a valve stem is fixedly installed on the top of the sphere.

[0010] Preferably, the connecting valve pipe is threadedly connected to the main valve pipe, and the sealing ring is movably connected to the mounting flange.

[0011] Preferably, a stud bolt penetrates the bottom of the ball valve body, one end of the stud bolt is movably connected to a valve bottom cover, and the outside of the stud bolt is movably connected to a hexagonal nut.

[0012] Preferably, the number of the cylindrical springs is set to be multiple, and the multiple cylindrical springs are distributed on the sealing ring at equal intervals.

[0013] Preferably, a fastening bolt passes through the top of the ball valve body, one end of the fastening bolt is movably connected to a metal valve seat, and a stuffing box is fixedly installed above the metal valve seat.

[0014] Preferably, a pressure plate is provided above the stuffing box, and a pneumatic actuator is fixedly mounted on the top of the valve stem.

[0015] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0016] 1. The utility model is provided with a mounting flange, an embedded groove, a sealing ring, a buffer groove, a telescopic rod, a cylindrical spring and a sealing ring. When the pneumatic ball valve is used, the main valve pipe of the pneumatic ball valve can be connected and installed with the external connecting valve pipe through the mounting flange and the fixing bolts. The embedded groove and the sealing ring increase the sealing structure at the connection, which can further reduce the possibility of connection leakage of the pneumatic ball valve. At the same time, a sealing ring is arranged inside the ball valve body, which contacts the outside of the ball through the expansion and contraction of the telescopic rod and the cylindrical spring, thus avoiding direct friction contact between the ball and the inside of the ball valve body. Such coordinated use not only reduces the loss of the ball and the ball valve body under long-term use, but also strengthens the sealing of the inside of the ball valve body. The external sealing ring enables the pneumatic ball valve to have good sealing ability, thus ensuring the normal opening and closing of the pneumatic ball valve and extending the overall service life.

[0017] 2. The utility model is provided with a ball valve body, studs, a valve bottom cover, hexagonal nuts, fastening bolts, a metal valve seat, a stuffing box and a pressure plate. After the pneumatic ball valve is used for a long time, some residues will remain due to the flow of internal liquid. The long-term accumulation of these residues will affect the normal opening and closing of the pneumatic ball valve. The valve bottom cover can be removed by the studs, and the metal valve seat and the stuffing box can be removed by the fastening bolts to clean the internal ball valve body to ensure the normal flow of the internal liquid of the pneumatic ball valve. In this way, the overall structure of the pneumatic ball valve is simple and easy to operate. If a fault occurs, it is also convenient for maintenance personnel to carry out repairs and replacements in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the sealing ring structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the valve bottom cover structure of the utility model;

[0022] Figure 4This is a schematic diagram of the sealing ring structure of the utility model;

[0023] Figure 5 This is a schematic diagram of the metal valve seat structure of the utility model.

[0024] Description of reference numerals:

[0025] 1. Ball valve body; 2. Main valve pipe; 3. Mounting flange; 4. Embedded groove; 5. Sealing ring; 6. Fixing bolt; 7. Connecting valve pipe; 8. Stud bolt; 9. Valve bottom cover; 10. Hexagonal nut; 11. Buffer groove; 12. Telescopic rod; 13. Column spring; 14. Sealing ring; 15. Ball; 16. Valve stem; 17. Fastening bolt; 18. Metal valve seat; 19. Stuffing box; 20. Pressure plate; 21. Pneumatic actuator. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] The utility model provides Figure 1-5 A sealed pneumatic ball valve shown includes a ball valve body 1 for carrying a main body of a pneumatic ball valve opening and closing component;

[0028] The main valve pipe 2 is arranged on one side of the ball valve body 1, and is used to guide the water flow through the pneumatic ball valve. The main valve pipe 2 is fixedly mounted with a mounting flange 3 on the outside, an embedded groove 4 is provided inside the mounting flange 3, a sealing ring 5 is provided inside the embedded groove 4, a fixing bolt 6 is passed through the outside of the mounting flange 3, and one end of the fixing bolt 6 is movably connected with a connecting valve pipe 7;

[0029] A buffer groove 11 is arranged inside the ball valve body 1 and is used for connecting and installing a cylindrical spring 13. A telescopic rod 12 is fixedly installed inside the buffer groove 11, and a cylindrical spring 13 is arranged outside the telescopic rod 12. A sealing ring 14 is fixedly installed at one end of the cylindrical spring 13, and a ball 15 is arranged on one side of the sealing ring 14. A valve stem 16 is fixedly installed on the top of the ball 15. A sealing ring 14 is arranged inside the ball valve body 1, and is abutted against the outside of the ball 15 through the expansion and contraction of the telescopic rod 12 and the cylindrical spring 13, thereby avoiding direct frictional contact between the ball 15 and the inside of the ball valve body 1. Such coordinated use not only reduces the wear and tear of the ball 15 and the ball valve body 1 under long-term use, but also enhances the sealing performance inside the ball valve body 1.

[0030] like Figure 1 , Figure 2 and Figure 3As shown, the connecting valve tube 7 is threadedly connected to the main valve tube 2, and the sealing ring 5 is movably connected to the mounting flange 3. The main valve tube 2 of the pneumatic ball valve can be connected and installed with the external connecting valve tube 7 through the mounting flange 3 and the fixing bolts 6. A stud bolt 8 runs through the bottom of the ball valve body 1, and one end of the stud bolt 8 is movably connected to a valve bottom cover 9, and the outside of the stud bolt 8 is movably connected to a hexagonal nut 10. The valve bottom cover 9 can be removed through the stud bolt 8, and the metal valve seat 18 and the stuffing box 19 can be removed by tightening the bolts 17 to clean the internal ball valve body 1, thereby ensuring the normal flow of liquid inside the pneumatic ball valve.

[0031] like Figure 1 , Figure 4 and Figure 5 As shown, the number of cylindrical springs 13 is set to be multiple, and the multiple cylindrical springs 13 are distributed at equal intervals on the sealing ring 14. The cylindrical springs 13 can drive the sealing ring 14 to expand and contract and rebound, so that the sealing ring 14 can be used in conjunction with the outside of the ball 15. A fastening bolt 17 runs through the top of the ball valve body 1, and one end of the fastening bolt 17 is movably connected to a metal valve seat 18. A stuffing box 19 is fixedly installed above the metal valve seat 18. The overall structure of the metal valve seat 18 is simple and easy to operate. If a fault occurs, it is also convenient for maintenance personnel to repair and replace it in time. A pressure plate 20 is arranged above the stuffing box 19, and a pneumatic actuator 21 is fixedly installed on the top of the valve stem 16. Some stuffing can be put into the stuffing box 19, which not only facilitates the pneumatic actuator 21 to operate the valve stem 16, but also increases the sealing of the valve stem 16.

[0032] The working principle of the utility model is as follows: firstly, the external power supply is turned on, and the pneumatic ball valve is taken out to connect and install the main valve pipe 2 of the pneumatic ball valve with the external connecting valve pipe 7 through the mounting flange 3 and the fixing bolts 6. The embedded groove 4 and the sealing ring 5 increase the sealing structure at the connection, which can further reduce the possibility of leakage of the pneumatic ball valve connection. Then, the pneumatic actuator 21 is turned on to allow the pneumatic actuator 21 to drive the valve stem 16 to rotate. At this time, the ball 15 rotates inside the ball valve body 1 under the influence of the rotation of the valve stem 16. The pneumatic ball valve is opened to allow the liquid to flow normally from the main valve pipe 2 to the ball valve body 1. Then, since the sealing ring 14 is arranged inside the ball valve body 1, it contacts the outside of the ball 15 through the expansion and contraction of the telescopic rod 12 and the columnar spring 13, thereby avoiding direct friction contact between the ball 15 and the inside of the ball valve body 1, and no It not only reduces the wear of the ball 15 and the ball valve body 1 under long-term use, but also strengthens the sealing inside the ball valve body 1. Together with the external sealing ring 5, the pneumatic ball valve has good sealing ability. After long-term use of the pneumatic ball valve, some residues will remain due to the flow of internal liquid. The long-term accumulation of these residues will affect the normal opening and closing of the pneumatic ball valve. The valve bottom cover 9 can be removed through the stud bolts 8, and the metal valve seat 18 and the stuffing box 19 can be removed through the tightening bolts 17 to clean the internal ball valve body 1 to ensure the normal flow of liquid inside the pneumatic ball valve. Finally, after completing the installation and use of all the pneumatic ball valves according to the above operations, turn off the switch of the pneumatic actuator 21. If it is not used for a long time, cut off the external power supply. In this way, the use process of the sealed pneumatic ball valve is completed.

[0033] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A sealed pneumatic ball valve, characterized in that: include A ball valve body (1) is used to carry the main body of the pneumatic ball valve opening and closing component; A main valve tube (2) is arranged on one side of the ball valve body (1) and is used to guide water flow through the pneumatic ball valve, and a mounting flange (3) is fixedly mounted on the outside of the main valve tube (2), an embedded groove (4) is provided inside the mounting flange (3), a sealing ring (5) is provided inside the embedded groove (4), a fixing bolt (6) penetrates the outside of the mounting flange (3), and one end of the fixing bolt (6) is movably connected to a connecting valve tube (7); A buffer groove (11) is arranged inside the ball valve body (1) and is used for connecting and installing a columnar spring (13). A telescopic rod (12) is fixedly installed inside the buffer groove (11). A columnar spring (13) is arranged outside the telescopic rod (12). A sealing ring (14) is fixedly installed at one end of the columnar spring (13). A ball (15) is arranged on one side of the sealing ring (14). A valve stem (16) is fixedly installed on the top of the ball (15).

2. A sealed pneumatic ball valve according to claim 1, characterized in that: The connecting valve pipe (7) is threadedly connected to the main valve pipe (2), and the sealing ring (5) is movably connected to the mounting flange (3).

3. A sealed pneumatic ball valve according to claim 1, characterized in that: A stud bolt (8) passes through the bottom of the ball valve body (1); one end of the stud bolt (8) is movably connected to a valve bottom cover (9); and the outside of the stud bolt (8) is movably connected to a hexagonal nut (10).

4. A sealed pneumatic ball valve according to claim 1, characterized in that: The number of the cylindrical springs (13) is set to be multiple, and the multiple cylindrical springs (13) are distributed on the sealing ring (14) at equal intervals.

5. A sealed pneumatic ball valve according to claim 1, characterized in that: A fastening bolt (17) passes through the top of the ball valve body (1), one end of the fastening bolt (17) is movably connected to a metal valve seat (18), and a stuffing box (19) is fixedly installed above the metal valve seat (18).

6. A sealed pneumatic ball valve according to claim 5, characterized in that: A pressure plate (20) is arranged above the stuffing box (19), and a pneumatic actuator (21) is fixedly mounted on the top of the valve stem (16).

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