Novel telescopic check valve pipe and ball valve with same

Abstract

The utility model relates to the technical field of valves, in particular to a novel telescopic check valve pipe and a ball valve with the valve pipe, which comprise a ball valve main body and a fluid channel arranged on the ball valve main body, and the telescopic check valve pipe is arranged on the ball valve main body. The telescopic check valve pipe comprises a valve bonnet used for being connected with a fluid channel, a telescopic pipe arranged on the valve bonnet in a telescopic mode and a loose joint cap rotatably arranged on the telescopic pipe, a pressing plate is arranged in the valve bonnet through a positioning device, the outer diameter of the pressing plate is smaller than the inner diameter of the valve bonnet, and a check device is arranged on the pressing plate.

Description

Technical Field

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

[0002] A ball valve is a common valve, which realizes the function of opening and closing the 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, and its structural function is relatively single.

[0003] The structure of the connecting pipe of the existing ball valve assembly is fixed, that is, its length is not adjustable. When connecting to an external water pipe or water meter, if the length does not match, it can only be replaced. Therefore, its adaptability is poor and it is inconvenient to use in certain occasions. For this reason, a novel telescopic check ball valve as shown in the application number CN202121958562.9 appears, in which a telescopic pipe that can be telescoped is arranged at one end of the valve body to match pipes of various lengths. However, since it is necessary to install a check device to enhance the performance of the ball valve, the check valve body has to be made into two sections. After long-term use, leakage is likely to occur at the connection between the check valve body and the telescopic sleeve, and the processing accuracy requirements are high. Summary of the Utility Model

[0004] Therefore, in view of the above problems, the utility model proposes a novel telescopic check valve pipe and a ball valve with the valve pipe.

[0005] To achieve the above object, the technical solution of the utility model provides a novel telescopic check valve pipe, including: a valve cap for connecting a valve, a telescopic pipe telescopically arranged on the valve cap, a union nut rotatably arranged on the telescopic pipe, a pressing plate is arranged in the valve cap through a positioning device and the outer diameter of the pressing plate is smaller than the inner diameter of the valve cap, and a check device is arranged on the pressing plate.

[0006] Further improvement is: the positioning device includes: a plurality of engaging plates arranged on the periphery of the pressing plate, a first limiting device arranged on the valve cap for preventing the pressing plate from moving towards the valve direction, a second limiting groove opened on the valve cap, and a second elastic snap ring arranged in the second limiting groove for preventing the pressing plate from moving away from the valve direction.

[0007] Further improvement is: the first limiting device includes: a first limiting ring platform arranged on the valve cap.

[0008] Further improvement is: the first limiting device includes: a first limiting groove opened on the valve cap, and a first elastic snap ring arranged in the first limiting groove.

[0009] Further improvement: The check valve device includes a sliding hole formed in the pressing plate, a check valve stem slidably disposed in the sliding hole, a check valve plate disposed on the check valve stem near one end of the valve, a sealing layer disposed on the check valve plate, a check valve seat disposed on the valve cap for cooperating with the check valve plate, and a spring sleeved on the check valve stem with one end resisting against the pressing plate and the other end resisting against the check valve plate.

[0010] Further improvement: A sliding sleeve matching the sliding hole is also disposed on the pressing plate.

[0011] Further improvement: Stabilizing plates matching the inner diameters of a plurality of valve caps are evenly distributed on the valve plate.

[0012] Further improvement: A plurality of reinforcing ribs are also disposed on the valve cap.

[0013] Further improvement: A third limiting groove is formed at one end of the valve cap away from the valve, a third elastic snap ring is disposed in the third limiting groove, and a third limiting ring platform engaged with the third elastic snap ring is disposed on the telescopic pipe;

[0014] A fourth limiting groove is formed at one end of the telescopic pipe away from the valve, a fourth elastic snap ring is disposed in the fourth limiting groove, and a fourth limiting ring platform engaged with the fourth elastic snap ring is disposed on the union nut.

[0015] A ball valve with a novel telescopic check valve pipe includes a ball valve body and a fluid passage formed in the ball valve body. A telescopic check valve pipe is disposed on the ball valve body. The telescopic check valve pipe includes a valve cap for connecting the fluid passage, a telescopic pipe telescopically disposed on the valve cap, and a union nut rotatably disposed on the telescopic pipe. A pressing plate is disposed in the valve cap through a positioning device and the outer diameter of the pressing plate is smaller than the inner diameter of the valve cap. A check valve device is disposed on the pressing plate.

[0016] The advantages and beneficial effects of the present utility model are as follows:

[0017] The structure is simple and the processing is convenient. The pressing plate is fixed through the positioning device, thus avoiding manufacturing the valve cap in two sections. Since the valve cap is integral, its sealing performance and strength are far stronger than those of a split valve cap, greatly enhancing the service life, reducing the processing difficulty, improving the economic benefit, and increasing the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view sectional schematic diagram of a novel telescopic check valve pipe of the present utility model and a ball valve with this valve pipe;

[0019] Figure 2 It is a schematic diagram of the pressing plate of a novel telescopic check valve pipe of the present utility model and a ball valve with this valve pipe;

[0020] Figure 3 Schematic diagram of a novel telescopic check valve pipe of the present utility model and a ball valve check valve plate with this valve pipe;

[0021] Figure 4 Enlarged schematic diagram of part A of a ball valve with a novel telescopic check valve pipe of the present utility model and this valve pipe;

[0022] Figure 5 Enlarged schematic diagram of part B of a ball valve with a novel telescopic check valve pipe of the present utility model and this valve pipe;

[0023] In the figure: 1. Ball valve body; 2. Fluid passage; 3. Valve cap; 4. Telescopic pipe; 5. Union nut; 6. Pressure plate; 7. Clamping plate; 8. Second limiting groove; 9. Second elastic snap ring; 10. First limiting ring platform; 11. Sliding hole; 12. Check valve rod; 13. Check valve plate; 14. Sealing layer; 15. Check valve seat; 16. Spring; 17. Sliding sleeve; 18. Stabilizing plate; 19. Reinforcing rib; 20. Third limiting groove; 21. Third elastic snap ring; 22. Third limiting ring platform; 23. Fourth limiting groove; 24. Four elastic snap rings; 25. Four limiting ring platforms. Specific embodiments

[0024] The following combines the accompanying drawings and embodiments to further describe the specific embodiments of the present utility model. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0025] As Figures 1 - 5 shown, a ball valve with a novel telescopic check valve pipe includes a ball valve body 1 and a fluid passage 2 opened on the ball valve body 1. A telescopic check valve pipe is provided on the ball valve body 1. The telescopic check valve pipe includes: a valve cap 3 for connecting the fluid passage 2, a telescopic pipe 4 telescopically arranged on the valve cap 3, and a union nut 5 rotatably arranged on the telescopic pipe 4. A pressure plate 6 is arranged in the valve cap 3 through a positioning device, and the outer diameter of the pressure plate 6 is smaller than the inner diameter of the valve cap 3. A check valve device is arranged on the pressure plate 6.

[0026] In order to position the pressure plate 6 to prevent it from moving, so as to install the check valve device, the positioning device includes: a plurality of clamping plates 7 arranged on the periphery of the pressure plate 6, a first limiting device arranged on the valve cap 3 for preventing the pressure plate 6 from moving towards the valve direction, a second limiting groove 8 opened on the valve cap 3, and a second elastic snap ring 9 arranged in the second limiting groove 8 for preventing the pressure plate 6 from moving away from the valve direction.

[0027] In order to prevent the pressure plate 6 from moving towards the valve direction, the first limiting device includes: a first limiting ring platform 10 arranged on the valve cap 3.

[0028] To prevent fluid backflow, the check valve device includes: a sliding hole 11 formed in the pressing plate 6, a check valve stem 12 slidably disposed in the sliding hole, a check valve plate 13 disposed on the check valve stem 12 near one end of the valve, a sealing layer 14 disposed on the check valve plate 13, a check valve seat 15 disposed on the valve cap 3 for cooperating with the check valve plate 13, and a spring 16 sleeved on the check valve stem 12 with one end resisting against the pressing plate 6 and the other end resisting against the check valve plate 13. The sealing layer 14 is a rubber layer.

[0029] To enhance the moving stability of the check valve plate 13, a sliding sleeve 17 matching the sliding hole 11 is further disposed on the pressing plate 6.

[0030] To enhance the moving stability of the check valve plate 13, a plurality of stabilizing plates 18 matching the inner diameter of the valve cap 3 are evenly disposed on the valve plate.

[0031] To enhance the strength of the valve cap 3 and facilitate screwing the valve cap 3 to connect with the valve body, a plurality of reinforcing ribs 19 are further disposed on the valve cap 3.

[0032] To facilitate pulling and pushing the telescopic tube 4 and rotating the union nut, a third limiting groove 20 is formed at one end of the valve cap 3 away from the valve, a third elastic snap ring 21 is disposed in the third limiting groove 20, and a third limiting ring platform 22 engaged with the third elastic snap ring 21 is disposed on the telescopic tube 4; a fourth limiting groove 23 is formed at one end of the telescopic tube 4 away from the valve, a fourth elastic snap ring 24 is disposed in the fourth limiting groove 23, and a fourth limiting ring platform 25 engaged with the fourth elastic snap ring 24 is disposed on the union nut.

[0033] Working principle: During assembly, the spring 16 is sleeved on the check valve stem 12 and placed in the valve cap 3 together. Then, the pressing plate 6 is placed by aligning the check valve stem 12 with the sliding hole 11. Then, the pressing plate 6 is positioned by the first elastic snap ring. Next, the telescopic tube 4 is inserted into the valve cap 3. Then, the telescopic tube 4 is limited by the third elastic snap ring 21 to prevent it from detaching. Finally, the union nut 5 is sleeved on the telescopic tube 4 and the union nut 5 is limited by the fourth elastic snap ring 24 to complete its rotational connection with the telescopic tube 4.

[0034] During use, the fluid flows from the fluid passage 2 to the valve cap 3, thereby impacting the check valve plate 13 to release its resistance against the check valve seat 15. At this time, the fluid can flow out. When the fluid flows backward, the check valve plate 13 quickly resets under the action of the spring 16, thereby preventing the fluid from flowing backward. Embodiment

[0035] Based on the technical solution of Embodiment 1, the cooperation between the second elastic snap ring and the second limiting groove can prevent the pressing plate from moving away from the valve. Similarly, the same structure can also prevent it from moving in the opposite direction. The first limiting device includes: a first limiting groove (not shown in the figure) opened on the valve cap, and a first elastic snap ring (not shown in the figure) arranged in the first limiting groove.

[0036] 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-mentioned embodiments. The above-mentioned embodiments and descriptions are only used to illustrate the principles 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 novel telescopic check valve tube, comprising: A valve bonnet for connecting a valve, a telescopic tube telescopically arranged on the valve bonnet, and a flexible cap rotatably arranged on the telescopic tube, characterized in that: a pressure plate is arranged in the valve bonnet through a positioning device, and the outer diameter of the pressure plate is smaller than the inner diameter of the valve bonnet, and a check device is arranged on the pressure plate; The positioning device includes: a plurality of locking plates arranged on the peripheral side of the pressure plate, a first limiting device arranged on the valve cap for preventing the pressure plate from moving toward the valve direction, a second limiting groove opened on the valve cap, and a second elastic clamping ring arranged in the second limiting groove for preventing the pressure plate from moving away from the valve direction.

2. A novel telescopic check valve tube according to claim 1, characterized in that: The first limiting device includes: a first limiting ring platform arranged on the valve cap.

3. The novel telescopic check valve tube according to claim 1 is characterized in that: The first limiting device includes: a first limiting groove formed on the valve cap and a first elastic clamping ring disposed in the first limiting groove.

4. The novel telescopic check valve tube according to claim 1 is characterized in that: The check device includes: a sliding hole opened on the pressure plate, a check valve stem slidably arranged in the sliding hole, a check valve plate arranged on the check valve stem and located close to one end of the valve, a sealing layer arranged on the check valve plate, a check valve seat arranged on the valve cap for cooperating with the check valve plate, and a spring sleeved on the check valve stem with one end resisting the pressure plate and the other end resisting the check valve plate.

5. A novel telescopic check valve tube according to claim 4, characterized in that: The pressing plate is also provided with a sliding sleeve matching the sliding hole.

6. A novel telescopic check valve tube according to claim 4, characterized in that: The valve plate is also evenly provided with stabilizing plates matching the inner diameters of a plurality of valve caps.

7. The novel telescopic check valve tube according to claim 1 is characterized in that: The valve cap is also provided with a plurality of reinforcing ribs.

8. The novel telescopic check valve tube according to claim 1 is characterized in that: A third limiting groove is formed on one end of the valve cap away from the valve, a third elastic clamping ring is arranged in the third limiting groove, and a third limiting ring engaging with the third elastic clamping ring is arranged on the telescopic tube; A fourth limiting groove is provided on one end of the telescopic tube away from the valve, a fourth elastic clamping ring is arranged in the fourth limiting groove, and a fourth limiting ring platform engaged with the fourth elastic clamping ring is arranged on the joint cap.

9. A ball valve with a novel telescopic check valve tube, comprising a ball valve body and a fluid channel provided on the ball valve body, wherein the ball valve body is provided with a telescopic check valve tube, characterized in that: The telescopic check valve tube comprises: a valve cap for connecting a fluid channel, a telescopic tube telescopically arranged on the valve cap, and a flexible cap rotatably arranged on the telescopic tube. A pressure plate is arranged in the valve cap through a positioning device, and the outer diameter of the pressure plate is smaller than the inner diameter of the valve cap. A check device is arranged on the pressure plate.

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