A self-engaging ball valve stem

Abstract

The utility model discloses a kind of self-engaging ball valve stems, including valve body, valve body outside is connected with valve seat fixedly, valve stem is fixedly installed in valve seat inside, valve ball is arranged at the bottom of valve stem, valve body inside is fixedly connected with sealing plate, valve stem outside is fixedly installed with sealing ring, hand wheel is sleeved on the outside of valve seat, hand wheel outside is fixedly connected with gear ring, valve seat inner wall is fixedly connected with clamping tooth.The utility model is limited by the gear ring of clamping tooth and the outside of valve stem and engages, avoid staff to cause ball valve stem displacement by mistake, lead to the opening of ball valve change and affect use effect, the sealing property of valve stem is enhanced by the sealing oil liquid in sealing oil cavity, sealing oil liquid is added into sealing oil cavity inside by oil outlet hole, then the elastic force of wave spring is used to promote sleeve to slide in oil inlet inner wall, until oil outlet hole moves to the blockage in oil inlet.

Description

Technical Field

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

[0002] Ball valves are commonly used to measure flow rate in pipelines. The closing element of a ball valve is a sphere, which rotates around the center line of the valve body to open and close. High-platform ball valves are mainly used in pipelines for shut-off, distribution, and changing the flow direction of the medium.

[0003] However, after the ball valve opening is adjusted, the ball valve stem is often accidentally moved by the operator, causing the ball valve opening to change and affecting the actual use effect. In addition, the ball valve stem is mostly sealed by a sealing ring during use, which makes the sealing effect limited and easy to wear. Therefore, a self-engaging ball valve stem is needed. Utility Model Content

[0004] The purpose of this invention is to provide a self-engaging ball valve stem to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a self-engaging ball valve stem, comprising a valve body, the outer side of which is fixedly connected to a valve seat, a valve stem fixedly installed inside the valve seat, a valve ball disposed at the bottom of the valve stem, a sealing plate fixedly connected inside the valve body, a sealing ring fixedly installed on the outer side of the valve stem, a handwheel sleeved on the outer side of the valve seat, a toothed ring fixedly connected to the outer side of the handwheel, a retaining tooth fixedly connected to the inner wall of the valve seat, a sealing oil cavity opened inside the valve seat, a sleeve disposed inside the valve seat, and an oil outlet hole opened on the outer side of the sleeve.

[0006] Preferably, an oil inlet is provided on the outer side of the valve body, the sealing oil cavity is connected to the oil inlet, the inside of the oil inlet is slidably engaged with the sleeve, the outer side of the sleeve is fixedly connected to the limiting strip, symmetrical limiting grooves are provided on the inner wall of the oil inlet, and the sleeve is slidably engaged with the limiting grooves through the limiting strip.

[0007] Preferably, symmetrical oil outlet holes are provided on the outer side of the sleeve, and a wave spring is provided at one end of the sleeve.

[0008] Preferably, the outer side of the valve stem is fixedly connected to the guide bar, and a rectangular guide groove is formed on the inner wall of the handwheel, through which the handwheel slides in cooperation with the guide bar.

[0009] Preferably, the inner wall of the valve seat is fixedly connected to the retaining teeth, the valve seat engages with the toothed ring through the retaining teeth, and a return spring is provided at the bottom of the toothed ring, the return spring being sleeved on the outside of the valve stem.

[0010] Preferably, a sealing groove is formed inside the valve body, and a sealing oil cavity is provided below the sealing groove. The sealing groove is installed in conjunction with a sealing ring.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model limits the movement of the ball valve stem by engaging the locking teeth with the toothed ring on the outside of the valve stem, preventing accidental displacement of the ball valve stem by the operator, which would change the opening degree of the ball valve and affect its performance. When adjusting the valve ball, the handwheel is pushed downward to disengage the toothed ring from the locking teeth, and the valve stem and valve ball can be rotated by the handwheel in conjunction with the guide bar to adjust the opening degree of the ball valve.

[0013] 2. This utility model also uses a sealing ring in conjunction with a sealing groove for sealing, and further enhances the sealing performance of the valve stem by using the sealing oil in the sealing oil cavity. When adding oil, the oil gun head is inserted into the sleeve, so that the sleeve slides on the inner wall of the oil inlet until the oil outlet moves into the sealing oil cavity. The sealing oil is then added into the sealing oil cavity through the oil outlet. Subsequently, the elastic force of the wave spring is used to push the sleeve to slide on the inner wall of the oil inlet until the oil outlet moves into the oil inlet and is blocked. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is an exploded view of the overall structure of this utility model;

[0016] Figure 3 This is a partial structural cross-sectional view of the present invention;

[0017] Figure 4 This is a partial structural schematic diagram of the present invention;

[0018] Figure 5 This is a cross-sectional view of the internal structure of the valve seat of this utility model.

[0019] In the diagram: 1. Valve body; 2. Valve seat; 3. Valve stem; 4. Valve ball; 5. Sealing plate; 6. Sealing ring; 7. Guide bar; 8. Handwheel; 9. Gear ring; 10. Clamping tooth; 11. Return spring; 12. Sealing groove; 13. Sealing oil chamber; 14. Oil inlet; 15. Sleeve; 16. Limit bar; 17. Oil outlet; 18. Wave spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-5 This utility model provides a technical solution: a self-engaging ball valve stem, including a valve body 1, which is T-shaped, with connectors at both ends. The valve body 1 is internally connected and fixed to a sealing plate 5. An arc-shaped groove is formed on the side of the sealing plate 5. The outer side of the valve ball 4 contacts and fits against the inner wall of the arc-shaped groove of the sealing plate 5. The outer side of the valve body 1 is connected and fixed to a valve seat 2, and the valve seat 2 is rotatably connected to the valve stem 3.

[0022] The bottom of the valve stem 3 is a rectangular rotating plate, and the top of the valve ball 4 has a rectangular horizontal groove. The bottom of the valve stem 3 is connected to the rectangular horizontal groove on the valve ball 4. The valve stem 3 drives the valve ball 4 to rotate, thereby adjusting the opening. At the same time, the rectangular horizontal groove on the top of the valve ball 4 reduces the difficulty of connecting the valve stem 3 and the valve ball 4, avoiding the difficulty of traditional rivet fixing.

[0023] The valve stem 3 is connected and fixed to several sealing rings 6 on its outer side. A sealing groove 12 is opened inside the valve body 1. The sealing groove 12 is an annular groove. The sealing rings 6 are fixedly installed inside the sealing groove 12. The sealing effect on the outer side of the valve stem 3 is enhanced by the cooperation between the sealing rings 6 and the sealing groove 12. The sealing groove 12 is located below the sealing oil chamber 13. The sealing oil chamber 13 is filled with sealing oil.

[0024] An oil inlet 14 is provided on the outer side of the valve body 1. The sealing oil chamber 13 is connected to the oil inlet 14. The inside of the oil inlet 14 is slidably fitted with the sleeve 15. The outer side of the sleeve 15 is fixedly connected to the limiting strip 16. Symmetrical limiting grooves are provided on the inner wall of the oil inlet 14. The sleeve 15 is slidably fitted with the limiting grooves through the limiting strip 16. Symmetrical oil outlet holes 17 are provided on the outer side of the sleeve 15. The sleeve 15 slides inside the oil inlet 14 until one end of the sleeve 15 is moved into the sealing oil chamber 13. The movement of the sleeve 15 is limited by the limiting strip 16 and the limiting groove, preventing the sleeve from sliding out. If the sleeve 15 deflects during movement, causing the oil outlet 17 to shift, a wave spring 18 is installed at one end of the sleeve 15. The wave spring 18 is suitable for confined spaces, providing elasticity and moderate stroke while also offering good foldability. The wave spring 18 is located inside the sealing oil chamber 13. When the sleeve 15 slides, it pushes one end of the wave spring 18 to contact the inner wall of the valve stem 3 until it is compressed, thus connecting the oil outlet 17 with the inside of the sealing oil chamber 13. After oil filling is complete, the elasticity of the wave spring 18 causes the oil outlet 17 to move into the oil filling port 14.

[0025] An oil outlet hole 17 is provided on the outer side of the sleeve 15. The movement of the sleeve 15 causes the oil outlet hole 17 to move and move to the inside of the oil inlet 14 to seal it.

[0026] A handwheel 8 is fitted onto the outer side of the valve seat 2. The outer side of the handwheel 8 is fixedly connected to the gear ring 9. The inner wall of the valve seat 2 is fixedly connected to several retaining teeth 10. The valve seat 2 engages with the gear ring 9 through the retaining teeth 10, which limits the valve stem 3 and prevents the valve stem 3 and the handwheel 8 from deflecting.

[0027] The valve stem 3 is fixedly connected to the guide bar 7 on its outer side. A rectangular guide groove is opened on the inner wall of the handwheel 8. The handwheel 8 slides with the guide bar 7 through the rectangular guide groove, so that the valve stem 3 and the handwheel 8 rotate synchronously through the guide bar 7.

[0028] A return spring 11 is provided at the bottom of the gear ring 9, and the return spring 11 is sleeved on the outside of the valve stem 3. A sealing oil cavity 13 is provided below the sealing groove 12, and the sealing groove 12 is installed in conjunction with the sealing ring 6.

[0029] Working principle: When adjusting the opening of the valve ball 4, pushing the handwheel 8 downwards disengages the gear ring 9 from the retaining tooth 10. Then, rotating the handwheel 8, in conjunction with the guide bar 7, drives the valve stem 3 to rotate. The valve stem 3 then rotates the valve ball 4, achieving flow regulation. Subsequently, the return spring 11 pushes the handwheel 8 and gear ring 9 upwards to reset. The engagement of the gear ring 9 and retaining tooth 10 limits the handwheel 8, preventing accidental deflection due to operator touch.

[0030] The sealing ring 6 seals with the sealing oil inside the sealing oil cavity 13, improving the sealing effect on the outside of the valve stem 3. The sealing oil effectively reduces the wear of the sealing ring 6 and extends its service life. When adding oil, insert the oil gun into the sleeve 15 and push the sleeve 15 to slide inside the oil inlet 14 until the oil outlet 17 is moved into the sealing oil cavity 13. The sealing oil can then be injected into the sealing oil cavity 13 through the oil outlet 17. Then, the elastic force of the wave spring 18 pushes the sleeve 15 to move inside the oil inlet 14 until the oil outlet 17 is blocked, preventing the oil in the sealing oil cavity 13 from overflowing from the oil outlet 17.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-engaging ball valve stem, comprising a valve body (1), characterized in that: The valve body (1) is fixedly connected to the valve seat (2) on the outside. A valve stem (3) is fixedly installed inside the valve seat (2). A valve ball (4) is provided at the bottom of the valve stem (3). The valve body (1) is fixedly connected to the sealing plate (5) inside. A sealing ring (6) is fixedly installed on the outside of the valve stem (3). A handwheel (8) is sleeved on the outside of the valve seat (2). The handwheel (8) is fixedly connected to the toothed ring (9) on the outside. The inner wall of the valve seat (2) is fixedly connected to the retaining tooth (10). A sealing oil cavity (13) is opened inside the valve seat (2). A sleeve (15) is provided inside the valve seat (2). An oil outlet hole (17) is opened on the outside of the sleeve (15).

2. The self-engaging ball valve stem according to claim 1, characterized in that: An oil inlet (14) is provided on the outside of the valve body (1). The sealing oil cavity (13) is connected to the oil inlet (14). The inside of the oil inlet (14) is slidably engaged with the sleeve (15). The outside of the sleeve (15) is fixedly connected with the limiting strip (16). A symmetrical limiting groove is provided on the inner wall of the oil inlet (14). The sleeve (15) is slidably engaged with the limiting groove through the limiting strip (16).

3. The self-engaging ball valve stem according to claim 2, characterized in that: The sleeve (15) has symmetrical oil outlet holes (17) on its outer side, and a wave spring (18) is provided at one end of the sleeve (15).

4. The self-engaging ball valve stem according to claim 1, characterized in that: The valve stem (3) is fixedly connected to the guide bar (7) on the outside. A rectangular guide groove is opened on the inner wall of the handwheel (8). The handwheel (8) slides with the guide bar (7) through the rectangular guide groove.

5. The self-engaging ball valve stem according to claim 1, characterized in that: The inner wall of the valve seat (2) is fixedly connected to the retaining tooth (10). The valve seat (2) engages with the toothed ring (9) through the retaining tooth (10). A return spring (11) is provided at the bottom of the toothed ring (9). The return spring (11) is sleeved on the outside of the valve stem (3).

6. The self-engaging ball valve stem according to claim 1, characterized in that: A sealing groove (12) is provided inside the valve body (1), and a sealing oil cavity (13) is provided below the sealing groove (12). The sealing groove (12) is installed in conjunction with the sealing ring (6).

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