Butterfly type telescopic check ball valve

Abstract

The utility model relates to the technical field of valves, in particular to a butterfly type telescopic check ball valve. Comprising a valve body, a water passing channel arranged in the valve body, a connecting pipe connected to the water passing channel in a threaded mode, a first valve rod rotationally arranged on the valve body through a sealing clamping device, and a ball valve element arranged in the valve body and clamped with the first valve rod through a rotating clamping device. The anti-theft butterfly valve is characterized in that limiting sealing devices are further arranged among the connecting pipe, the water passing channel and the ball valve element, a butterfly handle is arranged on the first valve rod through a fixing device, and an anti-theft device is arranged on the butterfly handle.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to a butterfly type expansion check ball valve. Background Art

[0002] A ball valve is a common valve, which realizes the function of opening and closing a medium passage by rotating the ball valve core. It is mainly used for cutting, distributing and changing the flow direction of the medium on the pipeline. In the actual application environment, the problem of mismatched connection lengths often occurs. For this reason, ball valves with expansion pipes have appeared on the market, but most of these ball valves are troublesome to assemble, which greatly affects the production efficiency and installation efficiency. Summary of the Utility Model

[0003] Therefore, in view of the above problems, the utility model provides a butterfly type expansion check ball valve.

[0004] To achieve the above object, the technical solution of the utility model is to provide a butterfly type expansion check ball valve, which includes a valve body, a water passage arranged in the valve body, a connecting pipe threadedly connected to the water passage, a first valve rod rotatably arranged on the valve body through a sealing engagement device, and a ball valve core arranged in the valve body and engaged with the first valve rod through a rotating engagement device. An expansion check device is arranged on the connecting pipe, and a limit sealing device is further arranged between the connecting pipe, the water passage and the ball valve core. A butterfly handle is arranged on the first valve rod through a fixing device, and an anti-theft device is arranged on the butterfly handle.

[0005] Further improvement is that: the limit sealing device includes: a first valve seat arranged on the water passage, a second valve seat arranged on the connecting pipe corresponding to the first valve seat, and a first sealing gasket is arranged at one end of the first valve seat and the second valve seat close to the ball valve core for sealing and positioning the ball valve core.

[0006] Further improvement is that: a plurality of force-applying blocks for resisting the valve body are further arranged on the connecting pipe.

[0007] Further improvement is that: a taper thread is further opened at one end of the valve body where the connecting pipe is not installed to improve the connection portability.

[0008] Further improvement is that: the fixing device includes: a sinking hole arranged on the butterfly handle, a first engaging groove opened at the bottom of the sinking hole, a first engaging rod arranged on the first valve rod for engaging with the first engaging groove, a fixing thread opened on the first engaging rod, a fixing nut locked on the fixing thread, a plastic pressing plate for covering the sinking hole, and a plurality of elastic plates arranged at the bottom of the plastic pressing plate corresponding to the sinking hole. The outer diameter of the plastic pressing plate is larger than the inner diameter of the sinking hole, and the plastic pressing plate is pressed on the sinking hole.

[0009] Further improvement is that: the anti-theft device includes at least one lead seal ring disposed on the butterfly handle for cooperating with a lead seal.

[0010] Further improvement is that: a positioning plate is provided on the valve body, and at least one arc-shaped plate for resisting against the positioning plate when the ball valve is fully closed and fully opened is provided at the bottom of the butterfly handle.

[0011] Further improvement is that: the telescopic check valve device includes: a sleeve locked on the connecting pipe, a mounting bracket provided on the sleeve for fluid to flow out, a sliding hole provided on the mounting bracket, a second valve stem slidably disposed on the sliding hole, a check valve plate provided on the second valve stem for sealing with a second valve seat, a second sealing gasket provided on the check valve plate, a spring sleeved on the second valve stem with one end resisting against the check valve plate and the other end resisting against the mounting bracket. An expansion pipe is provided in the sleeve through a sliding engagement device, and the other end of the expansion pipe is rotatably provided with a connecting nut through a limit engagement device, and a connecting thread is provided in the connecting nut.

[0012] Further improvement is that: the sliding engagement device includes: a limit ring block provided on the expansion pipe and matching the inner diameter of the sleeve, a limit ring groove opened on the sleeve, a snap ring provided in the limit ring groove for engaging with the limit ring block, a plurality of second sealing grooves opened on the limit ring block, and second sealing rings provided in the second sealing grooves.

[0013] Further improvement is that: the limit engagement device includes: a first limit ring platform provided on the expansion pipe, and a second limit ring platform provided in the connecting nut for engaging with the first limit ring platform.

[0014] Further improvement is that: a third sealing gasket is provided in the connecting nut on the first limit ring platform.

[0015] Further improvement is that: the sealing engagement device includes: a mounting hole opened on the valve body and coaxial with the ball valve spool, a plurality of first sealing grooves opened on the first valve stem, first sealing rings provided in the first sealing grooves, a limit platform provided at the bottom of the first valve stem for engaging with the mounting hole, and a limit groove for the limit platform to sink into is also opened on the valve body.

[0016] Further improvement is that: the rotational engagement device includes: a rotational engagement block provided at the bottom of the first valve stem, and a rotational engagement groove opened on the ball valve spool for engaging with the engagement block.

[0017] The advantages and beneficial effects of the present utility model are as follows:

[0018] 1. It has a simple structure and is convenient to use. The telescopic check device and the second valve seat are integrated on the connecting pipe, thus simplifying the overall installation steps of a butterfly telescopic check ball valve. The ball valve spool and the check valve plate share a second valve seat, avoiding material waste caused by setting multiple valve seats and greatly improving production convenience.

[0019] 2. The butterfly handle is set on the valve stem through a fixing device, avoiding the risk of accidental disassembly. And there is a lead seal ring for easy installation of the lead seal, avoiding the risk of accidental opening and playing a warning role at the same time. It is convenient for users to judge whether it has been opened by others through the integrity of the lead seal, improving convenience. At the same time, the butterfly handle itself is a straight line, making it easier for users to directly observe whether the butterfly handle has been rotated.

[0020] 3. The whole valve is of a through-type design, facilitating the faster discharge of fluid, reducing the impact force of the fluid on the valve pipeline, and thus prolonging the service life of the valve.

[0021] 4. One end of the valve is provided with taper threads with extremely strong sealing performance, facilitating users to directly tighten and seal without using a sealing tape. The other end is provided with a rotatable connecting nut, facilitating the tight connection of the external pipeline when the other end of the valve is already fixed and avoiding leakage. Brief Description of the Drawings

[0022] Figure 1 It is a front view sectional schematic diagram of a butterfly telescopic check ball valve of the present utility model;

[0023] Figure 2 It is a three-dimensional schematic diagram of the butterfly handle of a butterfly telescopic check ball valve of the present utility model;

[0024] Figure 3 It is a partial schematic diagram of the telescopic pipe of a butterfly telescopic check ball valve of the present utility model;

[0025] In the figure: 1. Valve body; 2. Water passage; 3. Connecting pipe; 4. First valve stem; 5. Ball valve spool; 6. Butterfly handle; 7. First valve seat; 8. Second valve seat; 9. First gasket; 10. Force application block; 11. Taper thread; 12. Sinking hole; 13. First engaging groove; 14. First engaging rod; 15. Fixed nut; 16. Plastic pressing plate; 17. Elastic plate; 18. Lead seal ring; 19. Positioning plate; 20. Arc plate; 21. Sleeve; 22. Mounting frame; 23. Sliding hole; 24. Second valve stem; 25. Check valve plate; 26. Second gasket; 27. Expansion pipe; 28. Connecting nut; 29. Connecting thread; 30. Limit ring block; 31. Limit ring groove; 32. Snap ring; 33. Second sealing groove; 34. Second sealing ring; 35. First limit ring platform; 36. Second limit ring platform; 37. Third gasket; 38. Mounting hole; 39. First sealing groove; 40. First sealing ring; 41. Limit platform; 42. Limit groove; 43. Rotating engaging block; 44. Rotating engaging groove; 45. Spring. Specific embodiments

[0026] The following combines the accompanying drawings and embodiments to further describe the specific embodiments of the present invention. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0027] As Figures 1-3 shown, a butterfly expansion check valve ball valve includes a valve body 1, a water passage 2 provided in the valve body 1, a connecting pipe 3 threadedly connected to the water passage 2, a first valve stem 4 rotatably provided on the valve body 1 through a sealing engagement device, and a ball valve spool 5 provided in the valve body 1 and engaged with the first valve stem 4 through a rotating engagement device. An expansion check device is provided on the connecting pipe 3, and a limit sealing device is further provided between the connecting pipe 3, the water passage 2 and the ball valve spool 5. A butterfly handle 6 is provided on the first valve stem 4 through a fixing device, and an anti-theft device is provided on the butterfly handle 6.

[0028] In order to facilitate the quick installation of the ball valve spool 5 and the connecting pipe 3 connected with the expansion check device, the limit sealing device includes: a first valve seat 7 provided on the water passage 2, and a second valve seat 8 provided on the connecting pipe 3 corresponding to the first valve seat 7. First gaskets 9 are provided at one ends of the first valve seat 7 and the second valve seat 8 close to the ball valve spool 5 for sealing and positioning the ball valve spool 5.

[0029] In order to facilitate the tightening of the connecting pipe 3 and prevent over-tightening from damaging the thread, a plurality of force application blocks 10 for resisting against the valve body 1 are further provided on the connecting pipe 3.

[0030] In order to facilitate the quick connection with an external pipeline when using a sealing tape, a taper thread 11 is also provided at one end of the valve body 1 where the connecting pipe 3 is not installed, so as to improve the connection portability.

[0031] In order to facilitate the installation of the butterfly handle 6 and prevent the butterfly handle 6 from being disassembled, the fixing device includes: a sunk hole 12 provided on the butterfly handle 6, a first engaging groove 13 opened at the bottom of the sunk hole 12, a first engaging rod 14 provided on the first valve stem 4 for engaging with the first engaging groove 13, a fixing thread (not shown in the figure) opened on the first engaging rod 14, a fixing nut 15 locked on the fixing thread, a plastic pressing plate 16 for covering the sunk hole 12, and a plurality of elastic plates 17 provided at the bottom of the plastic pressing plate 16 corresponding to the sunk hole 12. The outer diameter of the plastic pressing plate 16 is larger than the inner diameter of the sunk hole 12. The plastic pressing plate 16 is pressed against the sunk hole 12. At the same time, the plastic pressing plate 16 can also prevent dust and rainwater from contacting the fixing nut 15 and the first engaging rod 14, preventing corrosion and extending the service life.

[0032] In order to facilitate the user to install a lead seal on the ball valve to improve the safety of using the ball valve, prevent it from being opened and closed by outsiders, or warn the user that an outsider has opened and closed the valve, the anti-theft device includes: at least one lead seal ring 18 provided on the butterfly handle 6 for cooperating with the lead seal.

[0033] In order to facilitate the user to judge the opening and closing state and the opening and closing angle of the ball valve spool 5 externally, a positioning plate 19 is provided on the valve body 1, and at least one arc plate 20 for resisting against the positioning plate 19 when the ball valve is completely closed and completely opened is provided at the bottom of the butterfly handle 6. The arc plates 20 are two, and the angle between them and the positioning plate 19 is 90 degrees, which can ensure that when the user rotates to resist against the positioning plate 19, the water outlet of the ball valve spool and the water passage are on the same axis, thereby reducing the flow resistance and preventing damage to the valve.

[0034] In order to facilitate the connection with an external pipeline, the telescopic check valve device includes: a sleeve 21 locked on the connecting pipe 3, a mounting bracket 22 provided on the sleeve 21 for fluid to flow out, a sliding hole 23 opened on the mounting bracket 22, a second valve stem 24 slidably arranged on the sliding hole 23, a check valve plate 25 provided on the second valve stem 24 for sealing with the second valve seat 8, a second sealing gasket 26 provided on the check valve plate 25, and a spring 45 sleeved on the second valve stem 24 with one end resisting against the check valve plate 25 and the other end resisting against the mounting bracket 22. A telescopic pipe 27 is arranged in the sleeve 21 through a sliding engagement device, and the other end of the telescopic pipe 27 is rotatably arranged with a connecting nut 28 through a limit engagement device, and a connecting thread 29 is opened in the connecting nut 28.

[0035] To prevent fluid leakage and prevent the telescopic pipe 27 from falling off, the sliding engagement device includes: a limit ring block 30 provided on the telescopic pipe 27 and matching the inner diameter of the sleeve 21, a limit ring groove 31 opened on the sleeve 21, a snap ring 32 provided in the limit ring groove 31 for engaging with the limit ring block 30, a plurality of second sealing grooves 33 opened on the limit ring block 30, and a second sealing ring 34 provided in the second sealing grooves 33. Since the limit ring block 30 matches the inner diameter of the sleeve 21 and the second sealing ring 34 is provided, the telescopic pipe 27 has sliding stability, can ensure concentricity during sliding, and has sealing performance.

[0036] To facilitate the rotation of the connection nut 28, the limit engagement device includes: a first limit ring platform 35 provided on the telescopic pipe 27, and a second limit ring platform 36 provided in the connection nut 28 for engaging with the first limit ring platform 35.

[0037] To prevent fluid leakage, a third sealing pad 37 is provided on the first limit ring platform 35 inside the connection nut 28.

[0038] To prevent fluid leakage, the sealing engagement device includes: a mounting hole 38 opened on the valve body 1 and coaxial with the ball valve spool 5, a plurality of first sealing grooves 39 opened on the first valve stem 4, a first sealing ring 40 provided in the first sealing grooves 39, a limit platform 41 provided at the bottom of the first valve stem 4 for engaging with the mounting hole 38, and a limit groove 42 opened on the valve body 1 for the limit platform 41 to sink into.

[0039] To rotate the ball valve spool 5, the rotation engagement device includes: a rotation engagement block 43 provided at the bottom of the first valve stem 4, and a rotation engagement groove 44 opened on the ball valve spool 5 for engaging with the engagement block.

[0040] Working principle: During assembly, first pass the first valve stem 4 through the mounting hole 38 to complete the installation of the valve stem. Then install 9 first sealing pads on the first valve seat 7 and the second valve seat 8. Subsequently, place the ball valve spool 5 to complete the engagement. Then tighten the connecting pipe 3 to complete the installation of the ball valve spool 5. Finally, align the butterfly handle 6 with the first engagement rod 14, and then tighten the fixing nut 15 and press in the plastic pressing plate 16 to complete the assembly.

[0041] During installation, first connect to the external pipeline through the tapered thread 11. After pulling out the telescopic pipe 27 and aligning it with another pipeline, the connection with another pipeline can be completed through the connection nut 28.

[0042] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and descriptions is only to illustrate the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A butterfly type expansion check ball valve, comprising a valve body, a water passage arranged in the valve body, a connecting pipe threadedly connected to the water passage, a first valve stem rotatably arranged on the valve body through a sealing engagement device, and a ball valve spool arranged in the valve body and engaged with the first valve stem through a rotation engagement device. An expansion check device is arranged on the connecting pipe, and it is characterized in that: A limit sealing device is also provided between the connecting pipe, the water passage and the ball valve spool. A butterfly handle is arranged on the first valve stem through a fixing device, and an anti-theft device is arranged on the butterfly handle; The limit sealing device includes: a first valve seat arranged on the water passage, a second valve seat arranged on the connecting pipe corresponding to the first valve seat, and a first sealing gasket is arranged at one end of the first valve seat and the second valve seat close to the ball valve spool for sealing and positioning the ball valve spool; The telescopic check valve device includes: a sleeve locked on the connecting pipe, a mounting bracket arranged on the sleeve for fluid to flow out, a sliding hole arranged on the mounting bracket, a second valve stem slidably arranged on the sliding hole, a check valve plate arranged on the second valve stem for sealing with the second valve seat, a second sealing gasket arranged on the check valve plate, a spring sleeved on the second valve stem with one end resisting against the check valve plate and the other end resisting against the mounting bracket. An expansion pipe is arranged in the sleeve through a sliding engagement device, and the other end of the expansion pipe is rotatably arranged with a connecting nut through a limit engagement device, and a connecting thread is opened in the connecting nut.

2. The butterfly type expansion check ball valve according to claim 1, characterized in that: A plurality of force application blocks for resisting against the valve body are also arranged on the connecting pipe.

3. The butterfly type expansion check ball valve according to claim 1, characterized in that: A taper thread is also opened at one end of the valve body where the connecting pipe is not installed to improve the connection portability.

4. A butterfly expansion check ball valve according to claim 1, characterized in that: The fixing device includes: a sunken hole arranged on the butterfly handle, a first clamping groove opened at the bottom of the sunken hole, a first clamping rod arranged on the first valve stem for clamping with the first clamping groove, a fixing thread opened on the first clamping rod, a fixing nut locked on the fixing thread, a plastic pressing plate for covering the sunken hole, and a plurality of elastic plates arranged at the bottom of the plastic pressing plate corresponding to the sunken hole. The outer diameter of the plastic pressing plate is larger than the inner diameter of the sunken hole, and the plastic pressing plate is pressed on the sunken hole.

5. A butterfly expansion check ball valve according to claim 1, characterized in that: The anti-theft device includes: at least one lead seal ring arranged on the butterfly handle for cooperating with the lead seal.

6. A butterfly-type expansion check ball valve according to claim 1, characterized in that: A positioning plate is arranged on the valve body, and at least one arc-shaped plate for resisting against the positioning plate when the ball valve is completely closed and completely opened is arranged at the bottom of the butterfly handle.

7. A butterfly expansion check ball valve according to claim 1, characterized in that: The sliding engagement device includes: a limit ring block arranged on the expansion pipe and matching with the inner diameter of the sleeve, a limit ring groove opened on the sleeve, a snap ring arranged in the limit ring groove for engaging with the limit ring block, a plurality of second sealing grooves opened on the limit ring block, and a second sealing ring arranged in the second sealing groove.

8. A butterfly expansion check ball valve according to claim 1, characterized in that: The limit engagement device includes: a first limit ring platform arranged on the expansion pipe, and a second limit ring platform arranged in the connecting nut for engaging with the first limit ring platform.

9. A butterfly type telescopic check ball valve according to claim 8, characterized in that: A third sealing gasket is arranged on the first limit ring platform in the connecting nut.

10. A butterfly type expansion check ball valve according to claim 1, characterized in that: The sealing engagement device includes: a mounting hole opened on the valve body and on the same axis as the ball valve spool, a plurality of first sealing grooves opened on the first valve stem, a first sealing ring arranged in the first sealing groove, a limit platform arranged at the bottom of the first valve stem for engaging with the mounting hole, and a limit groove for the limit platform to sink into is also opened on the valve body.

11. A butterfly expansion check ball valve according to claim 1, characterized in that: The rotation engagement device includes: a rotation engagement block arranged at the bottom of the first valve stem, and a rotation engagement groove opened on the ball valve spool for engaging with the engagement block.

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