Novel ball valve

Abstract

The utility model discloses a novel ball valve, relates to ball valve technical field, including valve main part, seal ring, valve stem, bonnet and connecting hole, valve main part both ends are welded with flange ring, the flange ring is used for ball valve and pipeline connection, the inside valve seat of valve main part is embedded with the valve ball, the valve ball is sleeved outside the valve stem, and the connecting hole is connected with the valve stem. The valve cover of the valve is improved on the basis of a traditional ball valve, the valve cover is connected with the top of the valve rod through the fastening screw, the sealing ring used for secondary sealing is arranged between the valve cover and the top of the valve body, and the fastening screw is screwed down, so that the fastening screw can move downwards, and therefore the valve cover is prevented from falling off. When the fastening screw moves downwards, the valve cover can be driven to move downwards, then the valve cover can press the sealing ring downwards, good secondary sealing is achieved between the valve cover and the valve body, and the sealing performance of the valve cover can be conveniently adjusted by rotating the fastening screw.

Description

Technical Field

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

[0002] A ball valve is a valve that turns the ball inside the valve stem to open and close the valve. After searching, a patent with announcement number CN105156712B discloses a ball valve. Although the ball valve is small in size, has few consumables, low cost, simple synchronous operation, diversified operation, and selection, and effectively extends the service life of a single ball valve to more than 2 times, greatly saving costs, the existing ball valve stem and valve body are mostly sealed by packing, and secondary sealing cannot be achieved. When the sealing between the packing groove and the valve stem decreases, the lubricating oil inside the valve body used to lubricate the valve stem and the internal circulating medium will flow out, thereby affecting the use of the valve. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides a novel ball valve, which solves the problem in the background art that the prior ball valve cannot achieve secondary sealing and internal liquid leakage occurs when the sealing performance of the stuffing groove decreases.

[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a new type of ball valve, including a valve body, a sealing ring, a valve stem, a valve bonnet and a connecting hole, flange rings are welded at both ends of the valve body, the flange rings are used to connect the ball valve to a pipeline, a valve ball is embedded in a valve seat inside the valve body, the valve ball is sleeved on the outside of the valve stem, the valve stem is used to control the rotation of the valve ball, and the valve stem is rotatably connected to the inside of the valve body, and the outer wall of the valve stem is tightly fitted with the inner wall of the valve body, the top of the valve stem is connected to the valve bonnet by a set screw, and a sealing ring is arranged between the bottom of the valve bonnet and the top of the valve body.

[0005] Preferably, the surfaces of the sealing ring are tightly fitted to the valve body and the valve cap respectively, and the sealing ring is made of flexible rubber material. By increasing the number of sealing rings and stacking multiple sealing rings for use, the secondary sealing of the valve cover can be further improved.

[0006] Preferably, a circular hole groove is provided on the top of the valve bonnet, and a locking screw is inserted into the circular hole groove on the top of the valve bonnet. The locking screw is threadedly connected to the connecting hole. The connecting hole is provided at the top of the valve stem. The locking screw is used to fix the valve bonnet to the top of the valve stem. At the same time, the valve bonnet can apply downward pressure on the sealing ring by rotating the locking screw.

[0007] Preferably, the outer wall at one end of the top of the valve stem is provided with teeth distributed in a circular shape, and the inner wall of the valve cap is provided with tooth grooves that engage with the teeth of the outer wall of the valve stem. The valve stem is engaged with the inner wall of the valve cap through the teeth of the outer wall, so that the valve cap can rotate and the valve stem can be driven to rotate synchronously, thereby avoiding frequent rotation of the valve cap and causing the fixing screw to loosen.

[0008] Preferably, a limit groove is provided on the outer wall of the valve stem, the limit groove is rotatably connected to the inside of the valve body, and the limit groove is used to limit the upward movement of the valve stem, thereby facilitating preventing the valve stem from moving upward when the set screw is tightened.

[0009] Preferably, a groove is provided at the top of the hole slot at the top of the valve bonnet, and the top of the valve bonnet is flush with the top of the locking screw, and a cross groove for rotation is provided at the top of the locking screw, thereby facilitating keeping the top of the valve bonnet flat and avoiding interference with the installation of an external wrench for rotating the valve bonnet.

[0010] The utility model provides a new type of ball valve. It has the following beneficial effects:

[0011] (1) A novel ball valve is provided. The valve cover of the valve is improved on the basis of the traditional ball valve. The valve cover is connected to the top of the valve stem through a set screw, and a sealing ring for secondary sealing is arranged between the valve cover and the top of the valve body. By tightening the set screw, the set screw moves downward. When the set screw moves downward, it can drive the valve cover to move downward, so that the valve cover can press the sealing ring downward, so that there is a better secondary seal between the valve cover and the valve body, and the sealing of the valve cover can be conveniently adjusted by turning the set screw.

[0012] (2) This new type of ball valve, when the accuracy of closing the valve ball decreases, due to the angle limitation of the existing valve bonnet rotation, when the valve ball is still not in place after the valve bonnet and the valve stem are screwed into place, resulting in the valve ball being unable to fully close, the valve bonnet can be removed by removing the set screws, and then the valve stem can be rotated to fully close the valve ball, and the valve bonnet can be reinstalled in place to engage the outer teeth of the valve bonnet and the valve stem, thereby facilitating the accuracy of adjusting the valve ball. Compared with traditional valves, gear teeth are added to the middle valve stem, which can rotate 360 ​​degrees and be adjusted at will, thereby better realizing free angle adjustment and higher accuracy.

[0013] This solves the problem that the existing ball valve cannot achieve secondary sealing and internal liquid leakage occurs when the sealing performance of the stuffing groove decreases. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 2This is a schematic diagram of the connection structure between the set screw and the valve stem of the utility model;

[0016] Figure 3 This is a schematic diagram of the valve stem structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the top view structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the valve cap structure of the utility model.

[0019] In the figure, 1. valve body; 2. flange ring; 3. valve ball; 4. sealing ring; 5. valve stem; 6. valve cap; 7. set screw; 8. limit groove; 9. connecting hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1:

[0022] A new type of ball valve, including a valve body 1, a sealing ring 4, a valve stem 5, a valve bonnet 6 and a connecting hole 9. Flange rings 2 are welded at both ends of the valve body 1. The flange ring 2 is used to connect the ball valve to a pipeline. A valve ball 3 is embedded in a valve seat inside the valve body 1. The valve ball 3 is sleeved on the outside of the valve stem 5. The valve stem 5 is used to control the rotation of the valve ball 3. The valve stem 5 is rotatably connected to the inside of the valve body 1, and the outer wall of the valve stem 5 is tightly fitted with the inner wall of the valve body 1. The top of the valve stem 5 is connected to the valve bonnet 6 by a set screw 7. A sealing ring 4 is arranged between the bottom of the valve bonnet 6 and the top of the valve body 1. The surface of the sealing ring 4 is tightly fitted between the valve body 1 and the valve bonnet 6 respectively. The sealing ring 4 is made of flexible rubber material, and a circular hole groove is opened on the top of the valve bonnet 6 , and a set screw 7 is inserted into the circular hole groove on the top of the valve cap 6, and the set screw 7 is threadedly connected to the connecting hole 9, and the connecting hole 9 is opened at the top of the valve stem 5. The device improves the valve cover of the valve on the basis of the traditional ball valve, connects the valve cover to the top of the valve stem 5 through the set screw 7, and arranges a sealing ring 4 for secondary sealing between the valve cover and the top of the valve body 1. By tightening the set screw 7, the set screw 7 will move downward, and the set screw 7 can drive the valve cover to move downward while moving downward, so that the valve cover can press the sealing ring 4 downward, so that there is a better secondary seal between the valve cover and the valve body 1, and the sealing performance of the valve cover can be conveniently adjusted by rotating the set screw 7.

[0023] Embodiment 2:

[0024] The outer wall of one end of the top of the valve stem 5 is regularly distributed with teeth in an annular shape, and the inner wall of the valve cap 6 is provided with a tooth groove that engages with the teeth of the outer wall of the valve stem 5. The valve stem engages with the inner wall of the valve cap through the teeth of the outer wall. The outer wall of the valve stem 5 is provided with a limit groove 8, which is rotatably connected to the inside of the valve body 1, and the limit groove 8 is used to limit the up and down movement of the valve stem 5. A groove is provided at the top of the hole groove at the top of the valve cap 6, and the top of the valve cap 6 is flush with the top of the set screw 7. A cross groove for rotation is provided on the top of the set screw 7. When the accuracy of closing the valve ball 3 decreases, due to the existing valve cap 6 has an angle limit for rotation. When the valve ball 3 is still not in place after the valve bonnet 6 and the valve stem 5 are screwed into place, resulting in the valve ball 3 being unable to fully close, the valve bonnet 6 can be removed by removing the set screw 7, and then the valve bonnet 6 can be removed, and then the valve stem 5 can be rotated to make the valve ball 3 fully closed, and the valve bonnet 6 can be reinstalled in place to make the valve bonnet 6 mesh with the external teeth of the valve stem 5, which is conducive to achieving the accuracy of adjusting the valve ball 3. Compared with the traditional valve, the valve stem 5 in the middle is equipped with gear teeth, which can rotate 360 ​​degrees and be adjusted at will, so as to better realize the free adjustment of the angle and achieve higher accuracy.

[0025] Working principle: by tightening the set screw 7, the set screw 7 will move downward, and the set screw 7 can drive the valve cover to move downward, so that the valve cover can press the sealing ring 4 downward, so that there is a good secondary seal between the valve cover and the valve body 1, and the sealing performance of the valve cover can be conveniently adjusted by rotating the set screw 7, by removing the set screw 7, and then removing the valve bonnet 6, and then rotating the valve stem 5, the valve ball 3 can be fully closed, and the valve bonnet 6 is reinstalled in place, so that the valve bonnet 6 is engaged with the external teeth of the valve stem 5, which is conducive to achieving the accuracy of adjusting the valve ball 3.

[0026] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A new type of ball valve, characterized by: The invention comprises a valve body (1), a sealing ring (4), a valve stem (5), a valve bonnet (6) and a connecting hole (9), wherein flange rings (2) are welded at both ends of the valve body (1), and the flange rings (2) are used to connect the ball valve to a pipeline, a valve ball (3) is embedded in a valve seat inside the valve body (1), and the valve ball (3) is sleeved on the outside of the valve stem (5), and the valve stem (5) is used to control the rotation of the valve ball (3), and the valve stem (5) is rotatably connected to the inside of the valve body (1), and the outer wall of the valve stem (5) is tightly fitted with the inner wall of the valve body (1), the top of the valve stem (5) is connected to the valve bonnet (6) by a set screw (7), and a sealing ring (4) is arranged between the bottom of the valve bonnet (6) and the top of the valve body (1).

2. According to claim 1, a new type of ball valve is characterized in that: The surfaces of the sealing ring (4) are tightly fitted to the valve body (1) and the valve cap (6) respectively, and the sealing ring (4) is made of flexible rubber material.

3. According to the new ball valve of claim 1, it is characterized by: A circular hole groove is formed on the top of the valve bonnet (6), and a set screw (7) is inserted into the circular hole groove on the top of the valve bonnet (6). The set screw (7) is threadedly connected to a connecting hole (9), and the connecting hole (9) is formed on the top of the valve stem (5).

4. According to claim 1, a new type of ball valve is characterized in that: The outer wall of one end of the top of the valve stem (5) is provided with teeth regularly distributed in an annular shape, and the inner wall of the valve cap (6) is provided with tooth grooves that engage with the teeth of the outer wall of the valve stem (5).

5. According to the new ball valve of claim 1, it is characterized by: The outer wall of the valve stem (5) is provided with a limiting groove (8), the limiting groove (8) is rotatably connected to the inside of the valve body (1), and the limiting groove (8) is used to limit the upward and downward movement of the valve stem (5).

6. According to the new ball valve of claim 1, it is characterized by: A groove is provided at the top of the hole slot at the top of the valve bonnet (6), and the top of the valve bonnet (6) is flush with the top of the set screw (7). A cross groove for rotation is provided at the top of the set screw (7).

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