Simple ball valve

Abstract

The simple ball valve comprises a valve body, a valve rod, a ball body and a driving assembly, one end of the valve rod stretches into the valve body, the other end of the valve rod is connected with the driving assembly, the end, stretching into the valve body, of the valve rod is fixedly connected to the ball body in the circumferential direction, the ball body is composed of two half-ball cores fixedly connected through a bolt piece, and the half-ball cores are provided with flow channels and fixing holes. The valve body comprises a middle valve part and flange valve parts located on the two sides of the middle valve part. The simple ball valve structure can be quickly assembled during production and assembly, the sealing ring arranged at the joint of the two hemispheres ensures the sealing performance between the two hemispheres, the contact position between the valve ball and the inner wall of the valve body is subjected to soft scraping, the difficulty of production and assembly of the ball valve can be greatly reduced, the yield of the ball valve is clearly improved, and the simple ball valve structure is suitable for popularization and application. And the valve is convenient to assemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve technical field, concretely relates to a simple ball valve. BACKGROUND

[0002] Ball valve is a kind of valve type widely used in pipeline system, for controlling medium flow, it is mainly realized by rotating ball in valve core to open and close. Ball center has a through hole, when ball rotates and makes through hole align with fluid passage, valve is in open state, medium can pass without obstruction;When ball rotates and makes through hole perpendicular to fluid passage, valve is closed, and fluid flow is cut off. Ball valve is widely used in petroleum, natural gas, chemical industry, papermaking, pharmacy, water treatment and other fields due to its simple operation, good sealing performance, small size, light weight, convenient maintenance and wide application in working pressure and temperature range.

[0003] Ball valve generally includes valve body, ball is arranged in valve body, the upper end of valve body is provided with valve stem for driving ball to rotate, shaft slot structure is arranged on ball, the earliest ball valve is installed, the connection of ball and valve stem is through welding or in the form of connecting with handle and ball, then it is installed from valve cover, the structure of this kind of connection is not very convenient in disassembly and assembly, later, the connection of valve stem and ball is changed into the cooperation connection of valve stem extended from valve cover and ball installed from flow channel, achieves circumferential linkage, drives ball to rotate by driving valve stem to rotate, but this kind of mode is generally provided with flat groove on valve stem and cooperates with ball, ball and valve stem are not axially fixed, and there is some axial movement of valve stem in use process, therefore, the upper end of valve stem also needs to be axially fixed and limited. SUMMARY

[0004] The utility model aims at providing a simple ball valve.

[0005] The technical scheme of the utility model is as follows: a simple ball valve, including valve body, valve stem, ball and driving assembly, the one end of valve stem extends into valve body, and the other end is connected with driving assembly, the one end of valve stem extending into valve body is fixedly connected in circumferential direction on ball, the ball includes two half-sphere cores fixedly connected by bolt, the half-sphere core is equipped with flow channel and fixed hole, and the valve body includes middle valve part and flange valve part arranged on the both sides of middle valve part.

[0006] As the further setting of the above scheme, the fixed holes on the half-sphere core are evenly distributed in circumferential direction of ball center, and the half-sphere core is also equipped with valve stem groove.

[0007] As the further setting of the above scheme, the middle valve part and flange valve part are fixedly connected by bolt, and the middle valve part and flange valve part are also equipped with sealing packing ring.

[0008] As a further arrangement of the above-mentioned scheme, the flange valve part is provided with a sealing seat, and the sealing seat is sealed with the spherical surface formed by the two half ball cores.

[0009] As a further arrangement of the above-mentioned scheme, the sealing seat is provided with an arc surface matched with the spherical surface of the half ball core, and the fixing hole is arranged at the part of the half ball core away from the flow channel.

[0010] As a further arrangement of the above-mentioned scheme, the sealing groove is arranged on the outer ring of the flow channel at the position of the flat part of the half ball core, and the sealing groove is provided with a sealing ring.

[0011] As a further arrangement of the above-mentioned scheme, the linkage groove formed by the valve rod grooves of the two half ball cores on the sphere is matched with the square clamping part at the end of the valve rod, and the bottom of the valve rod groove is further provided with an axial limiting groove matched with the axial limiting part at the end of the valve rod.

[0012] Beneficial effects: the simple ball valve structure of the utility model is convenient for production and assembly, and the sealing of the jointing part of the two half balls ensures the sealing property between the two half balls, the soft scraping at the contact part between the valve ball and the inner wall of the valve body ensures that the valve ball and the valve body can also keep the sealing effect and will not leak, the difficulty of the production and assembly of the ball valve can be greatly reduced, the yield is improved, and the assembly of the valve is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is a schematic view of the simple ball valve structure of the utility model.

[0014] Fig. 2 It is a schematic view of the internal structure of the simple ball valve of the embodiment.

[0015] Fig. 3 It is a schematic view of the cross section of the simple ball valve of the embodiment.

[0016] Reference signs: 1, valve body; 11, middle valve part; 12, flange valve part; 13, sealing seat; 16, arc surface; 18, sealing ring; 2, valve rod; 21, square clamping part; 3, sphere; 31, half ball core; 32, flow channel; 33, fixing hole; 35, valve rod groove; 36, sealing ring; 37, sealing groove; 39, flat part; 4, driving assembly; 8, bolt. DETAILED DESCRIPTION

[0017] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other.

[0018] like Figs. 1-3 The illustration shows a simple ball valve, comprising a valve body 1, a valve stem 2, a ball 3, and a drive assembly 4. One end of the valve stem 2 extends into the valve body 1, and the other end is connected to the drive assembly 4. The end of the valve stem 2 extending into the valve body 1 is circumferentially fixed to the ball 3. The ball 3 includes two hemispherical cores 31 fixedly connected by bolts 8. The hemispherical cores 31 are provided with flow channels 32 and fixing holes 33. The valve body 1 includes a central valve section 11 and flange valve sections 12 located on both sides of the central valve section 11.

[0019] As a further feature of the above scheme, the fixing holes 33 on the hemispherical core 31 are evenly distributed around the circumference of the sphere. The hemispherical core 31 is also provided with a valve stem groove 35. The linkage groove formed by the valve stem grooves 35 of the two hemispherical cores 31 on the sphere 3 matches the square locking part 21 at the end of the valve stem 2. The bottom of the valve stem groove 35 is also provided with an axial limiting groove 38 that matches the axial limiting part 34 at the end of the valve stem 2.

[0020] As a further provision of the above scheme, the middle valve section 11 and the flange valve section 12 are tightened and fixed by bolts 8, and a sealing ring 18 is also provided between the middle valve section 11 and the flange valve section 12.

[0021] As a further provision of the above scheme, the intermediate valve section 11 and the flange valve section 12 are tightened and fixed together by bolts 8, and a sealing ring 18 is also provided between the intermediate valve section 11 and the flange valve section 12, such as... Fig. 3 The sealing ring 18 shown provides a gap seal for the connection between the bolts 8 and the central valve section 11 and the flange valve section 12.

[0022] As a further feature of the above scheme, the planar portion 39 of the hemispherical core 31 is provided with a sealing groove 37 on the outer ring of the flow channel 32. A sealing ring 36 is provided in the sealing groove 37. The sealing groove 37 and the sealing ring 36 provide a seal for the gap between the two hemispherical cores 31, preventing the medium from leaking from the flow channel 32.

[0023] refer to Figs. 1-3The simplified ball valve of this utility model, as shown, has a ball 3 composed of two hemispherical cores 31. The ball 3 not only has a flow channel 32, but also valve stem grooves 35 on the two hemispherical cores 31, which, when combined, form a linkage groove and an axial limiting groove 38 that match the square locking part 21 and the axial limiting part 34 at the end of the valve stem 2. When the valve stem 2 and the hemispherical cores 31 are connected, axial limiting is formed. When the valve stem 2 is driven by the driving component 4, it drives the ball 3 to rotate circumferentially, switching and cutting off the flow channel 32. In this embodiment, one end of the valve stem 2 extends into the valve body 1, and the other end is connected to the driving component 4. The end extending into the valve body 1 is circumferentially fixedly connected to the ball 3. As described above, the ball 3 of this embodiment is composed of two hemispherical cores 31, which are fixedly connected by bolts 8. It can be configured as follows... Fig. 3 The nut and bolt 8 are shown in the figure. Alternatively, an internal thread can be provided on one of the hemispherical cores 31 so that the bolt 8 can be fixed by engaging with the internal thread.

[0024] As a further provision of the above solution, the valve body 1 of this embodiment comprises a central valve section 11 and flange valve sections 12 located on both sides of the central valve section 11, as follows: Fig. 2 The flange valve section 12 shown has one on each side of the middle valve section 11, which is fixed by connecting and fixing with bolts 8. After fixing, as shown... Fig. 3 As shown, the flange valve part 12 extends into the valve body 1, and sealing seats 13 are provided on both sides of the ball 3. The sealing seats 13 and the arc surface of the ball 3 formed by the two hemispherical cores 31 are sealed. When the ball 3 rotates, the ball 3 cooperates with the sealing seats 13. For example, when the valve is opened, the two hemispherical cores 31 of the ball 3 are as follows: Fig. 3 The sealing seat 13 is shown to fit the sealing seat 13 with an arc. When the valve is closed, the ball 3 rotates 90 degrees. Referring to the prior art, the flow channel 32 is not directly aligned with the flange valve part 12. The valve flow channel 32 is cut off. The sealing seat 13 has an arc surface 16. The arc surface 16 matches the spherical surface of the hemispherical core 31. The fixing hole 33 is located on the part of the hemispherical core 31 away from the flow channel 32.

[0025] As a further feature of the above scheme, the fixing holes 33 on the hemispherical core 31 are evenly distributed around the circumference of the sphere. In this embodiment, the sphere 3 connects and fixes the two halves of the hemispherical core 31 through the fixing holes 33 and the bolts 8. The hemispherical core 31 is also provided with a valve stem groove 35. The linkage groove formed by the valve stem grooves 35 of the two hemispherical cores 31 on the sphere 3 matches the square locking part 21 at the end of the valve stem 2. The bottom of the valve stem groove 35 is also provided with an axial limiting groove 38 that matches the axial limiting part 34 at the end of the valve stem 2.

[0026] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A simple ball valve, comprising a valve body (1), a valve stem (2), a ball (3), and a drive assembly (4), characterized in that: One end of the valve stem (2) extends into the valve body (1), and the other end is connected to the drive assembly (4). The end of the valve stem (2) extending into the valve body (1) is circumferentially fixed to the ball (3). The ball (3) includes two hemispherical cores (31) fixedly connected by bolts (8). The hemispherical cores (31) are provided with flow channels (32) and fixing holes (33). The valve body (1) includes a middle valve part (11) and flange valve parts (12) located on both sides of the middle valve part (11).

2. A simple ball valve according to claim 1, characterized in that: The fixing holes (33) on the hemispherical core (31) are evenly distributed around the center of the sphere, and the hemispherical core (31) is also provided with a valve stem groove (35).

3. A simple ball valve according to claim 1, characterized in that: The middle valve section (11) and the flange valve section (12) are tightened and fixed together by bolts (8), and a sealing ring (18) is also provided between the middle valve section (11) and the flange valve section (12).

4. A simple ball valve according to claim 1, characterized in that: The flange valve section (12) is provided with a sealing seat (13), which is sealed with the arc surface of the sphere (3) formed by the two hemispherical cores (31).

5. A simple ball valve according to claim 4, characterized in that: The sealing seat (13) has an arc surface (16) that matches the spherical surface of the hemispherical core (31), and the fixing hole (33) is located on the part of the hemispherical core (31) away from the flow channel (32).

6. A simplified ball valve according to claim 1, characterized in that: The planar portion (39) of the hemispherical core (31) is located on the outer ring of the flow channel (32) and is provided with a sealing groove (37), and a sealing ring (36) is provided in the sealing groove (37).

7. A simplified ball valve according to claim 2, characterized in that: The linkage groove formed by the valve stem groove (35) of the two hemispherical cores (31) on the sphere (3) is matched with the square locking part (21) at the end of the valve stem (2). The bottom of the valve stem groove (35) is also provided with an axial limiting groove (38) that matches the axial limiting part (34) at the end of the valve stem (2).

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