Novel curved surface adjusting ball valve

Abstract

The utility model discloses a novel curved surface adjusting ball valve. The novel curved surface adjusting ball valve comprises a valve element, a shell, a connecting shaft and an operating handle. The valve element comprises a spherical body, the outer surface of the body is provided with at least one flow guide curved surface extending left and right, and the upper end face of the body is provided with a connecting end. The shell comprises an inlet, an outlet and a longitudinal through hole, the inlet and the outlet are located in the two ends, the middle circumference of the longitudinal through hole is slidably and hermetically connected with the main body, and the minimum transverse relative gap between the flow guide curved surface and the longitudinal through hole is a flow hole; the connecting shaft penetrates through a vertical hole in the upper end of the longitudinal middle of the shell to fix the connecting end, and the upper end is connected with the operating handle. By rotating the operating handle, the flow hole can be gradually enlarged or gradually reduced to zero from zero, so that the liquid flow in the longitudinal through hole is changed. The utility model has the effect of accurately adjusting the flow through the flow guide curved surface.

Description

Technical Field

[0001] The utility model relates to a hydraulic valve flow field, in particular to a novel curved surface regulating ball valve. Background Art

[0002] Ball valves are commonly used components in hydraulic circuits. They are generally used to open and close clean liquids. They have good sealing properties. Usually, ball valves cannot adjust flow rates. Some ball valves can be used for flow control, such as eccentric ball valves, but their mechanical structures are complex, the valve core requires high machining accuracy, the cost is high, the operation is relatively difficult, and the flow rate regulation cannot be accurately controlled. Utility Model Content

[0003] In order to solve one or more of the above problems, the utility model provides a novel curved surface regulating ball valve.

[0004] According to one aspect of the utility model, the novel curved surface regulating ball valve comprises: a valve core, a housing, a connecting shaft and an operating handle;

[0005] The valve core comprises a spherical main body, the outer surface of which is provided with at least one flow guiding curved surface extending left and right, and the upper end surface of which is provided with a connecting end;

[0006] The shell includes an inlet and an outlet at both ends and a longitudinal through hole connecting the two. The middle circumference of the longitudinal through hole is slidingly sealed to connect the main body. The minimum lateral relative gap between the flow guide curved surface and the longitudinal through hole is a flow hole.

[0007] The connecting shaft passes through the vertical hole at the longitudinal middle upper end of the shell to fix the connecting end and the upper end thereof is connected to the operating handle;

[0008] By turning the operating handle, the flow hole can be gradually enlarged from zero or gradually reduced to zero, thereby changing the liquid flow in the longitudinal through hole.

[0009] The beneficial effect of the novel curved surface regulating ball valve is that the flow rate of the liquid is gradually changed by setting the flow guide curved surface and gradually increasing or decreasing the area of ​​the flow hole between the flow guide curved surface and the longitudinal through hole.

[0010] In some embodiments, there is one guide surface, which is composed of chords that perpendicularly bisect a cross section passing through the center of the sphere, and the unfolded schematic diagram of the guide surface is an isosceles triangle.

[0011] In some embodiments, the arc angle formed by the midpoints of the chords of the guide curved surface is greater than 180°, and the valve core can be rotated at least 180° by operating the operating handle.

[0012] In some embodiments, the flow rate S of the flow hole is calculated as follows:

[0013] S=2V×D 2×(arcs ind / Dd / D);

[0014] Where V is the instantaneous velocity of the liquid, d is the length of the chord, and D is the diameter of the sphere.

[0015] In some embodiments, the upper surface of the upper flange at the lower end of the operating handle is provided with markings of flow rate and flow value.

[0016] In some embodiments, the upper flange is fixedly connected to the flange of the housing, and the connecting shaft passes through the middle hole of the upper flange to connect to the lower blind hole of the operating handle.

[0017] In some embodiments, a plurality of first sealing rings are provided between the sealing groove of the connecting shaft and the vertical hole.

[0018] In some embodiments, the card slot of the connecting end is snap-fitted with the lower card end of the connecting shaft.

[0019] In some embodiments, a positioning sleeve is connected to the large port of the housing, one end of the valve core is positioned and fits the inner side of the small port of the housing and the other end is positioned and fits the inner end surface of the positioning sleeve;

[0020] The small port of the shell and the upper and lower ends of the positioning sleeve respectively rotate and seal the guide channel of the valve core through two second sealing rings.

[0021] In some embodiments, the valve core is made of polytetrafluoroethylene material. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of a novel curved surface regulating ball valve according to one embodiment of the utility model;

[0023] Figure 2 for Figure 1 The schematic cross-sectional view of the new curved regulating ball valve is shown;

[0024] Figure 3 for Figure 2 A three-dimensional schematic diagram of the valve core and the connecting shaft shown;

[0025] Figure 4 for Figure 3 A three-dimensional schematic diagram of the valve core shown;

[0026] Figure 5 for Figure 4 A schematic cross-sectional view of the valve core shown;

[0027] Valve core 1, main body 10, flow guide curved surface 100, connecting end 101;

[0028] Shell 2, longitudinal through hole 200, vertical hole 201, flange 202;

[0029] Connecting shaft 3, sealing groove 31, lower clamping end 32;

[0030] Operating handle 4, lower end column 41, lower blind hole 42, lower positioning end ring 43;

[0031] Upper flange 5, lower groove 51, upper groove 52, middle hole 53;

[0032] First sealing ring 6; first flange 7; second flange 8; threaded end cover 9. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0034] Figures 1 to 5 The schematic diagram shows a new curved surface regulating ball valve according to an embodiment of the utility model. As shown in the figure, the new curved surface regulating ball valve comprises: a valve core 1, a housing 2, a connecting shaft 3 and an operating handle 4;

[0035] The valve core 1 comprises a spherical main body 10, on the outer surface of which at least one flow guiding curved surface 100 extending left and right is provided, and a connecting end 101 is provided on the upper end surface thereof;

[0036] The housing 2 includes an inlet and an outlet at both ends and a longitudinal through hole 200 connecting the two. The middle circumference of the longitudinal through hole 200 is slidingly sealed to connect the main body 10. The minimum lateral relative gap between the flow guide curved surface 100 and the longitudinal through hole 200 is a flow hole.

[0037] The connecting shaft 3 passes through the vertical hole 201 at the longitudinal middle upper end of the housing 2 and is fixedly connected to the connecting end 101, and its upper end is connected to the operating handle 4;

[0038] By rotating the operating handle 4 , the flow hole can be gradually enlarged from zero or gradually reduced to zero, thereby changing the liquid flow in the longitudinal through hole 200 .

[0039] The beneficial effect of the novel curved surface regulating ball valve is that by providing the flow guiding curved surface 100, the area of ​​the flow hole between the flow guiding curved surface 100 and the longitudinal through hole 200 gradually increases or decreases, thereby realizing a gradual change in the liquid flow rate.

[0040] Preferably, there is one guide surface 100, which is located in the middle of the main body 10. The guide surface 100 is composed of chords perpendicularly bisecting the cross section passing through the center of the sphere, and the chords gradually increase from one end where they coincide at a point to the other end. The expanded schematic diagram of the guide surface 100 is an isosceles triangle. The beneficial effects are: the structure is simple, convenient for processing and manufacturing, and the flow adjustment is easy to control.

[0041] Furthermore, the arc angle formed by the midpoints of the chords of the flow-guiding curved surface 100 is greater than 180°, and the valve core 1 can be rotated at least 180° by rotating the operating handle 4, so that each chord and the longitudinal through hole 200 sequentially form a flow hole, and preferably, the rotation angle is 270°. The beneficial effect is that the rotation range is large, and a larger range of flow adjustment is achieved.

[0042] Preferably, the calculation formula of the flow rate S of the flow hole is: S = 2V × D 2 ×(arcs ind / Dd / D);

[0043] Wherein V is the instantaneous flow velocity of the liquid, d is the length of the chord, and D is the diameter of the sphere. The beneficial effect is that the selected flow hole can control the change of the liquid flow with high precision.

[0044] Preferably, the upper surface of the upper flange 5 at the lower end of the operating handle 4 is provided with markings of flow rate and flow value. The beneficial effect is: further ensuring high-precision control of flow changes.

[0045] Further, the lower groove 51 of the upper flange 5 is inserted into the flange 202 at the upper end of the housing 2, the upper groove 52 of the upper flange 5 is sleeved with the lower end column 41 of the operating handle 4, and the middle hole 53 of the connecting shaft 3 passes through the upper flange 5 and is inserted into the lower blind hole 42 of the lower end column 41. Preferably, the upper flange 5 and the flange 202 are fixedly connected by screws or pins; the beneficial effect is that this arrangement facilitates the effective realization of rotating the ball valve to adjust the flow.

[0046] Preferably, the upper surface of the upper flange 5 is in contact with the lower positioning end ring 43 of the operating handle 4 , and the lower end column 41 is sealed in the space surrounded by the lower positioning end ring 43 and the upper flange 5 .

[0047] Furthermore, a plurality of first sealing rings 6 are provided between the sealing groove 31 of the connecting shaft 3 and the vertical hole 201. The beneficial effect is that the first sealing rings 6 can prevent liquid from overflowing, damaging parts, and polluting the external environment.

[0048] Further, the lower end of the connecting shaft 3 is a lower clamping end 32, and the connecting end 101 is a clamping groove matched with the lower clamping end 32. Thus, the connecting shaft 3 and the valve core 1 are clamped; in another preferred embodiment, the lower end of the connecting shaft 3 is a threaded column, and the connecting end is a threaded hole matched with the threaded column, so that the connecting shaft 3 and the valve core 1 are threadedly detachably connected.

[0049] Furthermore, the aperture of one port of the housing 2 is larger than the aperture of the other port, and a positioning sleeve is connected to the large port of the housing 2. One end of the valve core 1 is positioned to fit the inner side of the small port of the housing 2, and the other end is positioned to fit the inner end face of the positioning sleeve. The small port of the housing 2 and the upper and lower ends of the positioning sleeve respectively rotate and seal the flow guide channel of the valve core 1 through two second sealing rings. The beneficial effect is that the connection can effectively achieve good sealing and precise fixation of the valve core 1, which is convenient for subsequent precise flow adjustment.

[0050] Furthermore, the first flange 7 and the second flange 8 are fixed at both ends of the shell 2 by threaded end caps 9. The first flange 7 is an internal threaded hole, and the second flange 8 is an external threaded hole. The beneficial effect is that the flange is convenient for connecting to external pipelines and is easy to disassemble and maintain.

[0051] Preferably, the valve core 1 is made of polytetrafluoroethylene material, i.e. PTFE material, PVC-U\PP\PVDF, etc. PTFE material is resistant to high temperature and acid and alkali corrosion, has good elasticity, good machining performance, is suitable for harsh environments, and has a long service life.

[0052] In another preferred embodiment, the valve core 1 is made of plastic material, and a metal film is provided on its outer side, which has the beneficial effect that the metal film prevents long-term wear and tear and increases the service life.

[0053] Preferably, the valve core 1 is a detachable structure, and the valve core 1 includes a front half core and a rear half core, which are fixed together by screws, and the guide surface 100 is located in the front half core or the rear half core. The beneficial effect is: the detachable structure is convenient for processing and positioning, and can be replaced separately later, reducing maintenance costs.

[0054] Preferably, a positioning column is further provided at the lower end of the housing 2, and the groove at the lower end of the valve core 1 rotates the positioning column in a circle to prevent left-right deviation.

[0055] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. New curved regulating ball valve, It is characterized in that It comprises: a valve core (1), a housing (2), a connecting shaft (3) and an operating handle (4); The valve core (1) comprises a spherical main body (10), the outer surface of the main body (10) is provided with at least one flow-guiding curved surface (100) extending leftward and rightward, and the upper end surface thereof is provided with a connecting end (101); The shell (2) comprises an inlet and an outlet at two ends and a longitudinal through hole (200) connecting the two, the middle circumference of the longitudinal through hole (200) is slidingly sealed to connect the main body (10), and the minimum lateral relative gap between the flow guide curved surface (100) and the longitudinal through hole (200) is a flow hole; The connecting shaft (3) passes through a vertical hole (201) at the longitudinal middle upper end of the housing (2) and is fixedly connected to the connecting end (101), and its upper end is connected to the operating handle (4); By rotating the operating handle (4), the flow hole can be gradually increased from zero or gradually decreased to zero, thereby changing the liquid flow in the longitudinal through hole (200).

2. According to the new curved regulating ball valve of claim 1, It is characterized in that There is one guide curved surface (100), which is composed of chords perpendicularly bisecting a cross section passing through the center of a sphere, and the unfolded schematic diagram of the guide curved surface (100) is an isosceles triangle.

3. According to the new curved surface regulating ball valve of claim 2, It is characterized in that The angle of the circular arc formed by the midpoints of the chords of the guide curved surface (100) is greater than 180°, and the valve core (1) can be rotated by at least 180° by operating the operating handle (4).

4. The new curved regulating ball valve according to claim 2, It is characterized in that The calculation formula of the flow rate S of the flow hole is: S = 2V × D 2 ×(arcsin(d / D)-d / D); Where V is the instantaneous velocity of the liquid, d is the length of the chord, and D is the diameter of the sphere.

5. The new curved regulating ball valve according to claim 2, It is characterized in that The upper surface of the upper flange (5) at the lower end of the operating handle (4) is provided with markings of flow velocity and flow value.

6. The new curved regulating ball valve according to claim 5, It is characterized in that The upper flange (5) is fixedly connected to the flange (202) of the housing (2), and the connecting shaft (3) passes through the middle hole (53) of the upper flange (5) and is connected to the lower blind hole (42) of the operating handle (4).

7. The new curved regulating ball valve according to claim 1, It is characterized in that A plurality of first sealing rings (6) are provided between the sealing groove (31) of the connecting shaft (3) and the vertical hole (201).

8. The new curved regulating ball valve according to claim 1, It is characterized in that The clamping groove of the connecting end (101) and the lower clamping end (32) of the connecting shaft (3) are clamped and matched.

9. The new curved regulating ball valve according to claim 1, It is characterized in that A positioning sleeve is connected to the large port of the housing (2); one end of the valve core (1) is positioned and fitted to the inner side surface of the small port of the housing (2) and the other end is positioned and fitted to the inner end surface of the positioning sleeve; The small port of the housing (2) and the upper and lower ends of the positioning sleeve respectively rotate and seal the guide channel of the valve core (1) through two second sealing rings.

10. The new curved regulating ball valve according to any one of claims 1 to 9, It is characterized in that The valve core (1) is made of polytetrafluoroethylene material.

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