Sanitary three-piece ball valve

Abstract

The sanitary three-piece type ball valve comprises a three-piece type valve body and a fast-assembly type valve cover, a three-piece type straight-through ball is arranged in a cavity on the inner side of the three-piece type valve body, a first semi-packaging cover ring and a second semi-packaging cover ring are arranged in cavities on the two sides of the three-piece type straight-through ball respectively, and the opening directions of the first semi-packaging cover ring and the second semi-packaging cover ring are opposite. The two sides of the three-piece type valve body are each provided with a fast-assembly type valve cover, the top of the three-piece type valve body is further provided with an installation platform, and the center of the installation platform is provided with a valve rod connected with the three-piece type straight-through ball. The three-piece type straight-through ball is arranged in the cavity on the inner side of the three-piece type valve body, the first semi-packaging cover ring and the second semi-packaging cover ring are arranged in the cavities on the two sides of the three-piece type valve body respectively, and the opening directions of the first semi-packaging cover ring and the second semi-packaging cover ring are opposite to each other, so that an efficient clamping assembly is formed. Stable positioning of the three-piece type straight-through ball is guaranteed, the leakage problem caused by looseness of the ball body is effectively avoided, and the sealing performance and the overall stability of the ball valve are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve technical field, concretely is sanitary three-piece ball valve. BACKGROUND

[0002] In modern industrial production, especially in the food, medicine, beverage and other industries with extremely high sanitary requirements, the valve as an important control component in the fluid conveying system directly affects the quality and safety of the product. Three-piece ball valve has been widely used in the field of sanitary fluid control due to its structural characteristics.

[0003] However, the existing three-piece ball valve still has some problems to be solved in actual use. On the one hand, the positioning stability of the ball is insufficient. In high pressure or negative pressure environment, the traditional ball valve ball is easy to displace, which not only affects the normal work of the valve, but also may cause fluid leakage, and further cause product pollution or production accident, which brings economic loss and safety hazard to the enterprise. On the other hand, the installation and maintenance of the existing ball valve are more complicated. The traditional valve structure needs to consume a lot of time and manpower when installing and disassembling, which increases the production cost and labor intensity. Moreover, due to the poor sealing performance, frequent maintenance and replacement of sealing parts are often needed, which not only increases the maintenance cost, but also may affect the continuity of production. SUMMARY

[0004] The utility model aims at providing sanitary three-piece ball valve to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical scheme: sanitary three-piece ball valve, including three-piece valve body and quick mounting type valve cover, the cavity inside the inner side of three-piece valve body is provided with three-piece straight-through ball, and the cavities on both sides of three-piece straight-through ball are respectively provided with half-encapsulated cover ring one and half-encapsulated cover ring two with opposite opening directions, both sides of three-piece valve body are provided with quick mounting type valve cover, annular sealing washer is arranged at the connection between two quick mounting type valve covers and three-piece valve body, and connecting bait block is arranged at the position of four corners of two quick mounting type valve covers, each corresponding connecting bait block is fixedly connected through hexagonal head bolt and hexagonal nut, the top of three-piece valve body is further provided with mounting platform, and the center of mounting platform is provided with valve stem connected with three-piece straight-through ball.

[0006] Preferably, the top of the three-piece straight-through ball is provided with a hole for the threaded column at the bottom end of the valve stem to pass through, and the inner side of the three-piece straight-through ball is further provided with a locking nut connected with the threaded column of the valve stem.

[0007] Preferably, the center of each connecting bait block is provided with a through hole for the hexagonal head bolt to pass through, and the inner side of each hexagonal nut is provided with a spring pad.

[0008] Preferably, the inner side of the opening at both ends of the three-piece valve body is provided with a notch for accommodating an annular sealing gasket, and the depth of the notch is less than the thickness of the annular sealing gasket.

[0009] Preferably, the valve stem is sequentially provided with a valve stem gasket, a combined gasket, a butterfly spring and a hexagonal thin nut, and the butterfly spring is provided with two, and the two butterfly springs are oppositely arranged.

[0010] Preferably, the outer side of the valve stem between the valve stem gasket and the combined gasket is further provided with an O-ring, and the combined gasket and the butterfly spring are provided with a packing pressing sleeve, and the top of the hexagonal thin nut is provided with a retreat stop pad.

[0011] Preferably, the top end of the valve stem is further provided with a threaded connecting column connected with an external device.

[0012] The utility model relates to a sanitary three-piece ball valve, compared with prior art, has remarkable advantage and positive effect, and is embodied in the following aspects:

[0013] 1. The utility model discloses a three-piece straight-through ball is arranged in the chamber of the three-piece valve body inner side, and half-encapsulated cover ring no. 1 and half-encapsulated cover ring no. 2 are arranged in the chamber of both sides respectively, and a high -efficient clamping assembly is formed. The ball can be tightly fixed between half-encapsulated cover ring no. 1 and half-encapsulated cover ring no. 2 after installation, and displacement is not easily generated even under high pressure or negative pressure environment. This not only ensures the stable positioning of the three-piece straight-through ball, but also effectively avoids the leakage problem caused by the loosening of the ball, and significantly improves the sealing performance and overall stability of the ball valve.

[0014] 2. The utility model discloses a quick -witted formula valve cover design, and sets up annular sealing gasket at the junction of quick -witted formula valve cover and three -piece valve body. This quick -witted formula design greatly simplifies the installation and dismounting process of ball valve, reduces installation time and labor intensity. Meanwhile, the use of annular sealing gasket further enhances the sealing effect of the junction, reduces the maintenance frequency and cost.

[0015] 3. Connecting bait block is arranged at the position of every quick -witted formula valve cover four corners, and is fixedly connected through hexagonal head bolt and hexagonal nut. The center of each connecting bait block is provided with a through hole for the hexagonal head bolt to pass through, and the inner side of each hexagonal nut is provided with a spring pad, which not only ensures the firmness of the connection, but also can absorb and buffer external impact force to some extent, prolong the service life of the ball valve.

[0016] 4. The inner side of the opening at both ends of the three-piece valve body is provided with a notch for accommodating the annular sealing gasket, and the depth of the notch is less than the thickness of the annular sealing gasket. This design enables the sealing gasket to generate a certain pre-tightening force after installation, further improving the sealing effect and effectively preventing medium leakage.

[0017] 5. The valve stem is sequentially provided with a valve stem gasket, a combined gasket, a butterfly spring and a hexagonal thin nut, and the butterfly spring is provided with two opposite settings. This multi-level structure design not only enhances the stability of the valve stem, but also improves the adjustment accuracy. In addition, the O-ring between the valve stem gasket and the combined gasket and the packing sleeve between the combined gasket and the butterfly spring further improve the sealing performance and adjustment flexibility.

[0018] In summary, the utility model not only significantly improves the sealing performance, stability and service life of the ball valve, but also simplifies the installation and maintenance process, enhances the connection firmness, and improves the stability of the valve stem. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a three-dimensional explosion structure schematic diagram of the utility model;

[0020] Figure 2 It is a valve stem structure schematic diagram of the utility model;

[0021] Figure 3 It is a whole assembly structure schematic diagram of the utility model;

[0022] Figure 4 It is a valve stem and three-piece straight-through ball connection structure schematic diagram of the utility model;

[0023] In the drawing: 1, quick-mounting type valve cover; 2, annular sealing gasket; 3, half-encapsulated cover ring one; 4, three-piece valve body; 5, three-piece straight-through ball; 6, valve stem; 7, valve stem gasket; 8, O-ring; 9, combined gasket; 10, packing sleeve; 11, butterfly spring; 12, hexagonal thin nut; 13, stop washer; 14, hexagonal head bolt; 15, hexagonal nut; 16, spring washer; 17, notch; 18, half-encapsulated cover ring two; 19, connecting bait block; 20, through hole; 21, cavity; 22, mounting platform. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Please refer to Figures 1-4The utility model provides a kind of embodiment: sanitary three-piece ball valve, including three-piece valve body 4 and quick-mounting valve cover 1, the cavity 21 inside of three-piece valve body 4 inside is provided with three-piece straight-through ball 5, and the cavity 21 inside of three-piece straight-through ball 5 both sides is respectively provided with half-encapsulated cover ring one 3 and half-encapsulated cover ring two 18,

[0026] The inside cavity 21 of valve body 4 is designed as a cylinder, to facilitate the smooth rotation of three-piece straight-through ball 5.

[0027] Three-piece straight-through ball 5 is located inside the cavity 21 of valve body 4, and the surface of the ball is smooth to ensure the minimum resistance when the fluid passes through.

[0028] The middle part of straight-through ball 5 is hollow, and flow channel holes are provided at both ends. When the ball rotates 90 degrees, the flow channel holes are aligned or staggered with the flow channel of valve body 4, thereby realizing the opening or closing of the valve.

[0029] Half-encapsulated cover ring one 3 and half-encapsulated cover ring two 18 are located in the two side cavities 21 of three-piece straight-through ball 5, and their opening directions are opposite, forming an efficient clamping assembly. The ball can be tightly fixed between half-encapsulated cover ring one and half-encapsulated cover ring two after installation, and will not easily displace even in high or negative pressure environment.

[0030] Both sides of three-piece valve body 4 are provided with quick-mounting valve cover 1, and annular sealing gasket 2 is arranged at the connection between the two quick-mounting valve covers 1 and three-piece valve body 4.

[0031] The inside of the opening at both ends of three-piece valve body 4 is provided with a notch 17 for accommodating annular sealing gasket 2, and the depth of notch 17 is less than the thickness of annular sealing gasket 2.

[0032] Annular sealing gasket 2 is made of rubber, silicone or other materials with good sealing performance, to ensure the sealing performance between valve cover and valve body. The depth of notch 17 is less than the thickness of annular sealing gasket 2, so that the sealing gasket generates a certain pre-tightening force after the valve cover is connected to the valve body, further improving the sealing effect and effectively preventing medium leakage.

[0033] Connecting lugs 19 are arranged at the four corners of the two quick-mounting valve covers 1, and each connecting lug 19 is fixedly connected to the corresponding connecting lug 19 through hexagonal head bolt 14 and hexagonal nut 15. A through hole 20 is arranged at the center of each connecting lug 19 for hexagonal head bolt 14 to pass through, and spring pad 16 is arranged at the inside of each hexagonal nut 15.

[0034] The main function of connecting lug 19 is to provide a fixed connection point to ensure the stable connection between the two quick-mounting valve covers 1.

[0035] The center of each connecting block 19 is provided with a through hole 20 for the hexagonal head bolt 14 to pass through. The diameter of the through hole 20 is slightly larger than the diameter of the hexagonal head bolt 14, so that the hexagonal head bolt 14 can pass through smoothly, while ensuring the tightness of the connection.

[0036] Between each one-to-one connecting block 19, the hexagonal head bolt 14 and the hexagonal nut 15 are fixedly connected. One end of the hexagonal head bolt 14 passes through the through hole 20 of one connecting block 19, and the other end passes through the through hole 20 of the other connecting block 19, and then is fastened by the hexagonal nut 15.

[0037] In order to increase the stability and prevent loosening of the connection, the inner side of each hexagonal nut 15 is provided with a spring washer 16. The spring washer 16 will be elastically deformed during the nut tightening process, thereby providing a continuous elastic force to ensure the fastening state of the connection.

[0038] The top of the three-piece valve body 4 is also provided with a mounting platform 22, and the center of the mounting platform 22 is provided with a valve stem 6 connected to the three-piece straight-through ball 5.

[0039] The top of the three-piece straight-through ball 5 is provided with a hole for the threaded column at the bottom of the valve stem 6 to pass through, and the inner side of the three-piece straight-through ball 5 is also provided with a locking nut connected to the threaded column of the valve stem 6.

[0040] A mounting platform 22 is provided at the top of the three-piece valve body 4, which is used to fix and support other components.

[0041] A through hole is formed in the center of the mounting platform 22 for connection with the valve stem 6.

[0042] The valve stem 6 is located at the center of the mounting platform 22, and the bottom end is provided with a threaded column for connection with the three-piece straight-through ball 5.

[0043] The three-piece straight-through ball 5 is located inside the valve body, and the top is provided with a hole for the threaded column at the bottom of the valve stem 6 to pass through.

[0044] The inner side of the three-piece straight-through ball 5 is also provided with a locking nut connected to the threaded column of the valve stem 6, which is used to fix the relative position of the valve stem 6 and the straight-through ball 5.

[0045] The valve stem 6 is sequentially provided with a valve stem washer 7, a combined gasket 9, a butterfly spring 11 and a hexagonal thin nut 12, and the butterfly spring 11 is provided with two, and the two butterfly springs 11 are oppositely arranged.

[0046] An O-ring 8 is also provided on the outer side of the valve stem 6 between the valve stem washer 7 and the combined gasket 9, and a packing sleeve 10 is provided between the combined gasket 9 and the butterfly spring 11, and the top of the hexagonal thin nut 12 is provided with a stop washer 13.

[0047] The top end of the valve stem 6 is also provided with a threaded connection column connected with external equipment.

[0048] The top end of the valve stem 6 is provided with a threaded connection column for connecting with external equipment. The threaded connection column adopts standard thread design, facilitating quick and reliable connection with various external equipment.

[0049] The valve stem gasket 7 is located at the bottom of the valve stem 6 and is made of high-temperature-resistant and corrosion-resistant rubber material. The main function of the valve stem gasket 7 is sealing to prevent medium leakage. The inner diameter of the valve stem gasket 7 matches the outer diameter of the valve stem 6 to ensure tight fit.

[0050] An O-ring 8 is arranged outside the valve stem 6 between the valve stem gasket 7 and the combined gasket 9. The O-ring 8 is made of oil-resistant and corrosion-resistant rubber material, and has a circular cross-section with excellent sealing performance. The installation position of the O-ring 8 is shown in Figure 1 , which can effectively prevent medium leakage along the outside of the valve stem 6.

[0051] The combined gasket 9 is located above the O-ring 8 and is made of a metal and rubber composite structure. The upper and lower surfaces of the combined gasket 9 are in contact with the valve stem gasket 7 and the packing gland 10 respectively, and play the role of supporting and sealing. The inner diameter of the combined gasket 9 matches the outer diameter of the valve stem 6 to ensure tight fit.

[0052] The packing gland 10 is located between the combined gasket 9 and the butterfly spring 11 and is made of high-strength metal. The main function of the packing gland 10 is to compress the packing to prevent medium leakage. The outer diameter of the packing gland 10 matches the inner diameter of the combined gasket 9 to ensure firm installation.

[0053] The butterfly spring 11 is provided with two opposite butterfly springs 11. The butterfly spring 11 is made of high-strength spring steel and has good elasticity and fatigue resistance. The main function of the butterfly spring 11 is to provide a reset force to ensure that the valve stem 6 can move flexibly during opening and closing. The two opposite butterfly springs 11 can balance the stress and prolong the service life.

[0054] The hexagonal thin nut 12 is located above the butterfly spring 11 and is made of high-strength metal. The hexagonal thin nut 12 is connected with the valve stem 6 through threads and is used to fix the butterfly spring 11 and the packing gland 10. The top of the hexagonal thin nut 12 is provided with a stop washer 13 to prevent the nut from loosening.

[0055] The stop washer 13 is located at the top of the hexagonal thin nut 12 and is made of high-temperature-resistant and corrosion-resistant plastic material. The main function of the stop washer 13 is to prevent the hexagonal thin nut 12 from loosening during vibration or impact, ensuring the stability of the valve stem assembly.

[0056] In use,

[0057] Put half-encapsulated cover ring one 3 and half-encapsulated cover ring two 18 into the three-piece valve body 4 respectively on both sides of the inner chamber 21, and make the openings opposite. Then put the three-piece straight-through ball 5 into the chamber 21 between the two half-encapsulated cover rings, and use the clamping effect of the half-encapsulated cover rings to position the straight-through ball 5, ensuring its stability in high or negative pressure environment.

[0058] Put the threaded column at the bottom end of the valve stem 6 through the hole at the top of the three-piece straight-through ball 5, and screw the locking nut that matches the threaded column of the valve stem 6 into the inside of the straight-through ball 5 to fix the relative position of the valve stem 6 and the straight-through ball 5, so that the valve stem 6 can rotate the straight-through ball 5.

[0059] Put the annular sealing washer 2 into the notch 17 at the opening of both ends of the three-piece valve body 4. Since the depth of the notch 17 is less than the thickness of the annular sealing washer 2, the sealing washer will generate a certain amount of pre-tightening force after installation to enhance the sealing effect.

[0060] Put the quick-mounting valve cover 1 at both ends of the three-piece valve body 4, and align the connecting lugs 19 on the quick-mounting valve cover 1 with the corresponding positions on the valve body 4.

[0061] Pass the hexagonal head bolt 14 through the through hole 20 of the two corresponding connecting lugs 19 in turn, and then tighten the hexagonal nut 15. During this process, the spring washer 16 will be elastically deformed due to the tightening of the nut, providing a continuous elastic force to ensure the firmness of the connection and prevent loosening.

[0062] From the bottom end of the valve stem 6, install the valve stem washer 7, O-ring 8, combined washer 9, packing press sleeve 10, two oppositely arranged butterfly springs 11, hexagonal thin nut 12, and stop washer 13 in turn. The valve stem washer 7 serves a sealing function to prevent leakage of the medium from the bottom of the valve stem; the O-ring 8 further enhances the sealing performance at the valve stem; the combined washer 9 provides support and assists in sealing; the packing press sleeve 10 compresses the packing to prevent leakage of the medium; the butterfly spring 11 provides a restoring force, making the valve stem 6 move flexibly and evenly; the hexagonal thin nut 12 fixes the butterfly spring 11 and the packing press sleeve 10, and the stop washer 13 prevents the hexagonal thin nut 12 from loosening.

[0063] Through the threaded connection column at the top end of the valve stem 6, according to the standard thread design, it is quickly and reliably connected with external equipment (such as hand wheel, electric actuator, etc.).

[0064] Drive the valve stem 6 to rotate through the external equipment (such as hand wheel, electric actuator, etc.). The valve stem 6 drives the three-piece straight-through ball 5 to rotate synchronously. When the straight-through ball 5 rotates 90 degrees, the flow passage holes at both ends of the straight-through ball 5 align with the flow passages of the three-piece valve body 4. At this time, the valve is open, and the fluid can pass smoothly through the valve body 4.

[0065] Again, the external device is operated to rotate the valve stem 6 reversely by 90 degrees, and the straight-through ball 5 is also rotated reversely by 90 degrees, the flow channel holes at both ends of the straight-through ball 5 are misaligned with the flow channel of the valve body 4, the fluid is prevented from passing through, and the valve is closed.

[0066] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0067] It is to be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that, when the terms "comprise" and / or "include" are used in the specification, there is a presence of a feature, step, work, device, component and / or combination thereof.

[0068] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0069] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Sanitary triple offset ball valve comprising a triple offset valve body (4) and a quick coupling bonnet (1), characterized in that: The cavity (21) inside the three-piece valve body (4) is internally provided with a three-piece straight-through ball (5), and the cavities (21) on both sides of the three-piece straight-through ball (5) are respectively provided with a half-encapsulated cover ring I (3) and a half-encapsulated cover ring II (18) with opposite opening directions, both sides of the three-piece valve body (4) are provided with quick-mounting valve covers (1), the connection parts of the two quick-mounting valve covers (1) and the three-piece valve body (4) are both provided with annular sealing gaskets (2), and the four corner positions of the two quick-mounting valve covers (1) are both provided with connecting lures (19), each corresponding connecting lure (19) is fixedly connected through a hexagonal head bolt (14) and a hexagonal nut (15), and the top of the three-piece valve body (4) is further provided with a mounting platform (22), and the center of the mounting platform (22) is provided with a valve stem (6) connected with the three-piece straight-through ball (5).

2. The sanitary triple offset ball valve of claim 1, wherein: The top of the three-piece straight-through ball (5) is provided with a hole for the bottom threaded column of the valve stem (6) to penetrate, and the inner side of the three-piece straight-through ball (5) is further provided with a locking nut connected with the threaded column of the valve stem (6).

3. The sanitary triple offset ball valve of claim 1, wherein: The center of each connecting lure (19) is provided with a through hole (20) for the hexagonal head bolt (14) to pass through, and the inner side of each hexagonal nut (15) is provided with a spring pad (16).

4. The sanitary triple offset ball valve of claim 1, wherein: The inner side of the opening at both ends of the three-piece valve body (4) is provided with a notch (17) for accommodating the annular sealing gasket (2), and the depth of the notch (17) is less than the thickness of the annular sealing gasket (2).

5. The sanitary triple offset ball valve of claim 1, wherein: The valve stem (6) is sequentially provided with a valve stem gasket (7), a combined gasket (9), a butterfly spring (11), and a hexagonal thin nut (12), and the butterfly spring (11) is provided with two, and the two butterfly springs (11) are oppositely arranged.

6. The sanitary triple offset ball valve of claim 5, wherein: The outer side of the valve stem (6) between the valve stem gasket (7) and the combined gasket (9) is further provided with an O-ring (8), and the combined gasket (9) and the butterfly spring (11) are provided with a packing pressing sleeve (10), and the top of the hexagonal thin nut (12) is provided with a retreat stop pad (13).

7. The sanitary triple offset ball valve of claim 1, wherein: The top end of the valve stem (6) is further provided with a threaded connecting column connected with an external device.

Images