Ball valve with self-locking structure

Abstract

The utility model relates to a ball valve with self -locking structure, including the valve seat, install the sealing cover on the valve seat, install the limit disc on the sealing cover, the middle rotation of limit disc is connected with the valve stem, the top of valve stem installs the hand wheel, the bottom of valve stem installs the ball, is set up with the through slot on the ball, install the pointing plate on the valve stem, install the mounting seat on the pointing plate, the pointing plate is used to indicate the opening direction of through slot, the limit rod is installed coaxially on the mounting seat. The utility model discloses through being provided with valve seat, sealing cover, limit disc, valve stem, pointing plate, mounting seat, end cap, hand wheel, limit rod, limit hole and ball, when rotating hand wheel drives the ball rotation, the pointing plate synchronous rotation is convenient to indicate the through slot position, through the support plate limit limit rod completely slides out, when again inserting the limit rod into the inside of corresponding limit hole, can lock the valve stem, thereby avoiding the rotation valve stem of mistake touch hand wheel, improves the stability of ball valve isolation and control.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically a ball valve with a self-locking structure. Background Technology

[0002] A ball valve is a rotary valve that uses a ball as its opening and closing element. The passage is opened or closed by rotating the ball 90° around the valve stem axis. It is widely used in fluid transportation systems such as petroleum, chemical, and water supply and drainage systems to cut off or connect media or regulate flow.

[0003] The core structure of a ball valve includes a valve body, a ball, a valve seat, a valve stem, and an operating mechanism. The valve body, as the basic load-bearing component, provides the medium flow channel, and its material is selected according to the characteristics of the medium, such as carbon steel or stainless steel. The ball is the core opening and closing element, with a circular through hole (the diameter of the through hole matches the inner diameter of the pipe). Rotation controls the alignment or misalignment of the through hole with the pipe. The valve seat is a sealing component that fits tightly against the surface of the ball, usually made of elastic material, to ensure the sealing performance when the ball rotates and prevent medium leakage. The valve stem connects the ball and the operating mechanism, transmits torque to drive the ball to rotate, and its top is connected to a handle, worm gear, or electric actuator. The operating mechanism is usually a handle for manual operation, but can also be equipped with an electric or pneumatic actuator.

[0004] Traditional ball valves with self-locking mechanisms open and close by rotating the handle, which drives the valve stem and ball to rotate. During use, the operator may accidentally touch the handle, causing the valve stem to rotate. This causes the ball to rotate a certain angle within the valve seat, creating a gap that allows fluid to leak out, severely affecting system isolation and process control. Utility Model Content

[0005] The technical problem this invention aims to solve is that existing ball valves are prone to accidental operation by the operator, which can lead to fluid leakage and affect the isolation and process control of the ball valve.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A ball valve with a self-locking structure includes a valve seat, a sealing cover installed on the valve seat, a limit plate installed on the sealing cover, a valve stem rotatably connected to the middle of the limit plate, a handwheel installed at the top of the valve stem, a ball installed at the bottom of the valve stem, a through groove opened on the ball, a guide plate installed on the valve stem, a mounting seat installed on the guide plate, the guide plate is used to indicate the opening direction of the through groove, a limit rod is coaxially installed on the mounting seat, an end cap is installed on the limit rod, a support plate is coaxially installed on the limit rod, and a plurality of limit holes are opened on the limit plate for the limit rod to be inserted.

[0007] The beneficial effects of this utility model are as follows: by providing a valve seat, sealing cover, limit plate, valve stem, guide plate, mounting base, end cap, handwheel, limit rod, limit hole, and ball, when the handwheel is turned to drive the ball to rotate, the guide plate rotates synchronously to conveniently indicate the position of the through groove. The support plate restricts the limit rod from sliding out completely. When the limit rod is inserted into the corresponding limit hole, the valve stem can be locked, thereby preventing accidental handwheel rotation of the valve stem and improving the stability of ball valve isolation and control.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the limiting rod is cylindrical and fixedly connected to the support plate to form an integral structure. The mounting base has a first slot for the support plate to slide.

[0010] Furthermore, a spring is coaxially mounted on the limiting rod, one end of which is fixedly connected to the support plate, and a support ring is mounted on the other end of the spring, which is slidably connected to the limiting rod.

[0011] Furthermore, the limit rod is equipped with threaded teeth, and the mounting base is provided with threaded grooves for the threaded teeth to be threadedly connected.

[0012] Furthermore, a second slot is provided on the valve seat, which allows the ball to rotate.

[0013] Furthermore, two connecting pipes are installed on the valve seat. One end of the connecting pipe is connected to the second slot, and the other end of the connecting pipe is fixedly connected to the first flange.

[0014] Furthermore, a second flange is installed on the valve seat, and a third flange is installed on the sealing cover. The second and third flanges are fixed together by bolts, and a circular groove is provided in the middle of the sealing cover for the valve stem to rotate.

[0015] Furthermore, a retaining ring is coaxially mounted on the valve stem, and a third groove is provided on the valve seat for the retaining ring to engage.

[0016] The beneficial effects of adopting the above-mentioned further solution are as follows: by setting a spring and a support ring, the support ring is circular and used to support the inner top of the threaded groove, which improves the stability of the spring support force transmission. The elastic force of the spring acts on the support plate, which improves the stability of the limit rod inserted into the limit hole. By setting a threaded groove and threaded teeth, by lifting the end cap and then threading the threaded teeth into the threaded groove, the bottom end of the limit rod is prevented from being supported on the surface of the limit plate, thereby improving the stability of the valve stem when rotating. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 This is a schematic diagram of the overall unfolded structure of this utility model; Figure 5 This is a cross-sectional view of the mounting base of this utility model; Figure 6 This is a schematic diagram of the limiting rod structure of this utility model; Figure 7 This is a cross-sectional view of the valve seat of this utility model.

[0018] The attached diagram lists the components represented by each number as follows: 1. Valve seat; 2. Sealing cap; 3. Limiting plate; 4. Valve stem; 5. Pointer plate; 6. Mounting base; 7. End cap; 8. Handwheel; 9. Limiting rod; 10. Limiting hole; 11. Connecting pipe; 12. First flange; 13. Ball; 14. Through groove; 15. Snap ring; 16. Threaded groove; 17. First groove; 18. Spring; 19. Support plate; 20. Support ring; 21. Threaded tooth; 22. Second groove; 23. Third groove; 24. Second flange; 25. Third flange. Detailed Implementation

[0019] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0020] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0021] like Figure 1-7As shown, a ball valve with a self-locking structure includes a valve seat 1. The valve seat 1 is made of CF3M (316L) stainless steel containing molybdenum, which has strong resistance to pitting and crevice corrosion, and is especially suitable for chloride ion environments. It is suitable for corrosive media such as acid, alkali, and salt solutions, as well as media requiring cleanliness. A sealing cover 2 is installed on the valve seat 1 to close the valve seat 1. A limit plate 3 is installed on the sealing cover 2. A valve stem 4 is rotatably connected to the middle of the limit plate 3. A handwheel 8 is installed at the top of the valve stem 4. A ball 13 is installed at the bottom of the valve stem 4. A second groove 22 is opened on the valve seat 1 to allow the ball 13 to rotate. The outer dimensions of the ball 13 are... The valve seat 1 is fitted with the internal dimensions of the second slot 22. Two connecting pipes 11 are installed on the valve seat 1. One end of the connecting pipe 11 is connected to the second slot 22 for easy flow. The other end of each connecting pipe 11 is fixedly connected to a first flange 12. Each first flange 12 has a threaded hole for bolt connection. A through groove 14 is opened on the ball 13. When the handwheel 8 is rotated, it drives the valve stem 4 and the ball 13 to rotate. When the through groove 14 is coaxial with the connecting pipe 11, the ball valve opens. When the through groove 14 is perpendicular to the path of the connecting pipe 11, the ball valve closes. A guide plate 5 is installed on the valve stem 4. A mounting seat 6 is installed on the guide plate 5. The guide plate 5 is used to indicate the opening direction of the through groove 14. The operator can easily confirm the orientation of the through groove 14 by observing the direction of the indicator plate 5, thus facilitating the confirmation of the ball valve's operating status. A limit rod 9 is coaxially mounted on the mounting base 6, and a support plate 19 is coaxially mounted on the limit rod 9. The limit rod 9 is cylindrical and fixedly connected to the support plate 19 to form an integral structure. The support plate 19 is used to support and limit the limit rod 9, thereby preventing the limit rod 9 from detaching from the mounting base 6 and improving the safety of the limit rod 9 installation. An end cap 7 is installed on the limit rod 9, and the end cap 7 has an anti-slip groove to increase frictional resistance, improving the stability of the operator lifting the limit rod 9. Several limit holes 10 are provided on the limit plate 3. The limiting hole 10 is for the insertion of the limiting rod 9. When the limiting rod 9 is inserted into the limiting hole 10, it can restrict the rotation of the valve stem 4. This utility model is provided with a valve seat 1, a sealing cover 2, a limiting plate 3, a valve stem 4, a guide plate 5, a mounting base 6, an end cap 7, a handwheel 8, a limiting rod 9, a limiting hole 10, and a ball 13. When the handwheel 8 is turned to drive the ball 13 to rotate, the mounting base 6 rotates synchronously to facilitate the indication of the position of the through groove 14. The support plate 19 restricts the limiting rod 9 from sliding out completely. When the limiting rod 9 is inserted into the corresponding limiting hole 10, the valve stem 4 can be locked, thereby preventing accidental contact with the handwheel 8 to rotate the valve stem 4 and improving the stability of the ball valve isolation and control.

[0022] The mounting base 6 has a first slot 17 for the support plate 19 to slide. The support plate 19 is disc-shaped, and its outer diameter matches the inner diameter of the first slot 17, which improves the stability of the vertical movement of the limiting rod 9. A spring 18 is coaxially mounted on the limiting rod 9. One end of the spring 18 is fixedly connected to the support plate 19 by welding, and the other end of the spring 18 is fitted with a support ring 20 by welding. The support ring 20 is circular and is used to support the inner top of the first slot 17. The support ring 20 is slidably connected to the limiting rod 9, which improves the stability of the spring 18 under compression deformation. The elastic force of the spring 18 acts on the support plate 19, which improves the stability of the limiting rod 9 inserted into the limiting hole 10, thereby preventing the limiting rod 9 from slipping out of the limiting hole 10 and improving the safety of locking.

[0023] In practical use, this invention can also use a magnetic block to replace the spring 18 and the support ring 20. The magnetic block is embedded in the bottom end of the magnetic block limiting rod 9. The limiting plate 3 is made of cast iron. When the bottom end of the limiting rod 9 is inserted into the limiting hole 10, the strong external magnetic field of the magnetic block will apply a "force" to make the originally disordered microscopic magnetic domains inside the limiting plate 3 oriented in a neat direction along the direction of the external magnetic field. This process is called magnetization, which makes the metal block itself a magnet. Since the magnetic poles of the magnetized metal are opposite to the magnetic poles of the original magnet, according to the principle of "opposite magnetic poles attract each other", a significant attraction is generated between the two, thereby improving the stability of the limiting rod 9 inserted into the limiting hole 10.

[0024] The limit rod 9 is equipped with threaded teeth 21, and the mounting base 6 is provided with threaded grooves 16. The threaded grooves 16 are for threaded connection of the threaded teeth 21. When it is necessary to rotate the valve rod 4, the limit rod 9 is pulled out of the limit hole 10 by lifting the end cap 7, thereby engaging and locking. Then the threaded teeth 21 are threaded into the threaded groove 16, thereby preventing the bottom end of the limit rod 9 from being supported on the surface of the limit plate 3, thus improving the stability of the valve rod 4 when rotating.

[0025] A second flange 24 is installed on the valve stem 4, and a third flange 25 is installed on the sealing cover 2. The second flange 24 and the third flange 25 are fixed by bolts. A circular groove is opened in the middle of the sealing cover 2 for the valve stem 4 to rotate. A retaining ring 15 is coaxially installed on the valve stem 4. The retaining ring 15 is made of metal and is circular. Several rubber sealing rings are fitted on the inner side wall of the retaining ring 15. The sealing rings are elastic and are fitted onto the valve stem 4. A sealing gasket is bonded to the bottom end of the valve stem 4. Several concentric annular grooves are opened on the sealing gasket. A third groove 23 is opened on the valve seat 1. The third groove 23 is used for the retaining ring 15 to engage, thereby improving the sealing performance of the valve stem 4.

[0026] Working principle: When using this ball valve with a self-locking structure, the operator installs the connecting pipe 11 on the pipeline with bolts. By turning the handwheel 8, the valve stem 4 is rotated, which in turn rotates the ball 13 inside the second slot 22. When the opening direction of the through slot 14 is coaxial with the two limit holes 10, the ball valve is open. When the opening direction of the through slot 14 is perpendicular to the limit hole 10, the ball valve is closed. The pointer plate 5 faces the same direction as the opening of the through slot 14. The operator can easily confirm the open and closed state of the ball valve by observing the position pointed to by the pointer plate 5. The handwheel 8 is a smooth disc and needs to be held and rotated by the operator. When the ball 13 rotates to the designated position, the operator pulls the end cap 7 to insert the limit rod 9 into the corresponding limit hole 10, thereby locking the valve stem 4 and restricting its rotation. At the same time, the elastic force of the spring 18 acts on the support plate 19, which improves the stability of the limit rod 9 inserted inside the limit hole 10.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A ball valve with a self-locking structure, characterized by: It includes a valve seat (1), a sealing cover (2) installed on the valve seat (1), a limit plate (3) installed on the sealing cover (2), a valve stem (4) rotatably connected in the middle of the limit plate (3), a handwheel (8) installed at the top of the valve stem (4), a ball (13) installed at the bottom of the valve stem (4), a through groove (14) opened on the ball (13), a guide plate (5) installed on the valve stem (4), a mounting seat (6) installed on the guide plate (5), the guide plate (5) is used to indicate the opening direction of the through groove (14), a limit rod (9) is coaxially installed on the mounting seat (6), an end cap (7) is installed on the limit rod (9), a support plate (19) is coaxially installed on the limit rod (9), and a number of limit holes (10) are opened on the limit plate (3), the limit holes (10) are for the limit rod (9) to be inserted.

2. The ball valve with self-locking structure according to claim 1, characterized in that, The limiting rod (9) is cylindrical and fixedly connected to the support plate (19) to form an integral structure. The mounting base (6) has a first slot (17) for the support plate (19) to slide.

3. The ball valve with self-locking structure according to claim 2, characterized in that, A spring (18) is coaxially mounted on the limiting rod (9). One end of the spring (18) is fixedly connected to the support plate (19), and the other end of the spring (18) is equipped with a support ring (20). The support ring (20) is slidably connected to the limiting rod (9).

4. The ball valve with self-locking structure according to claim 2, characterized in that, The limit rod (9) is equipped with threaded teeth (21), and the mounting base (6) is provided with threaded grooves (16), which are used for threaded connection of the threaded teeth (21).

5. The ball valve with self-locking structure according to claim 1, characterized in that, A second slot (22) is provided on the valve seat (1), and the ball (13) is allowed to rotate through the second slot (22).

6. A ball valve with self-locking structure according to claim 5, characterized in that, Two connecting pipes (11) are installed on the valve seat (1). One end of the connecting pipe (11) is connected to the second slot (22), and the other end of the connecting pipe (11) is fixedly connected to the first flange (12).

7. The ball valve with self-locking structure according to claim 1, characterized in that, A second flange (24) is installed on the valve seat (1), and a third flange (25) is installed on the sealing cover (2). The second flange (24) and the third flange (25) are fixed by bolts. A circular groove is provided in the middle of the sealing cover (2) for the valve stem (4) to rotate.

8. The ball valve with self-locking structure according to claim 7, characterized in that, A retaining ring (15) is coaxially mounted on the valve stem (4), and a third slot (23) is provided on the valve seat (1) for the retaining ring (15) to engage.

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