Variable-volume high-frequency metering ball valve

Abstract

The utility model discloses a variable-volume high-frequency metering ball valve which comprises an outer shell, a ball body arranged in an inner cavity of the outer shell, a valve rod connected to the ball body and used for driving the ball body to rotate and a valve seat used for achieving gap sealing between the outer shell and the ball body, and a medium flowing channel is jointly formed by the outer shell and an inner cavity of the valve seat. A conical hole communicated with the medium flowing channel is formed in the position, corresponding to the height of the medium flowing channel, of one side of the ball body, a metering pad is detachably arranged at the bottom of the conical hole through a locking piece, and a volume metering cavity is jointly defined by the hole wall of the conical hole and one end of the metering pad; the volume of the volume metering cavity can be changed by replacing the metering pads with different sizes, so that the metering volume of the metering ball valve is changed. The metering pad is higher in universality and better in flexibility, materials of different volumes can be metered by replacing metering pads of different sizes, the metering pads are easy and convenient to replace, the shell does not need to be detached, and the replacement time can be greatly shortened.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of measuring valve, especially, relate to a variable volume high frequency measuring ball valve. BACKGROUND

[0002] Some special positions on solid particle material catalyst and other devices need to use measuring ball valve, and the measuring ball valve requires accurate measurement, rapid opening and closing, frequent switching and other process requirements. In the prior art, for example, a new type of high frequency measuring ball valve is disclosed in Chinese patent authorized publication No. CN221221502U, an integrated connecting rod ball is used, a valve cavity bushing is arranged to fill between the valve body and the connecting rod ball to realize gap sealing, and the measurement accuracy of the measuring ball valve can be improved. However, in the scheme, the measurement hole is directly arranged on the side wall of the ball body, and the size of the measurement hole cannot be changed. Only fixed measurement of fixed volume can be realized, and the measurement volume cannot be changed. If the measurement volume needs to be changed, the integrated connecting rod ball needs to be replaced as a whole. Not only is the disassembly and installation extremely inconvenient, but also a plurality of different integrated connecting rod balls need to be prepared according to different measurement volumes, which increases the production cost.

[0003] Therefore, it is necessary to provide a variable volume high frequency measuring ball valve to solve the above technical problems. CONTENT OF UTILITY MODEL

[0004] The main purpose of the utility model is to provide a variable volume high frequency measuring ball valve, which has better versatility and flexibility. Different sizes of measurement pads can be replaced to realize measurement of different volumes of materials. Moreover, the replacement of the measurement pad is simple and convenient, and the shell does not need to be disassembled, so that the replacement time can be greatly shortened.

[0005] The utility model realizes the above-mentioned purpose through the following technical scheme: a variable volume high frequency measuring ball valve, which comprises an outer shell, a ball arranged in the inner cavity of the outer shell, a valve rod connected to the ball and driving the ball to rotate, and a valve seat realizing gap sealing between the outer shell and the ball. The inner cavities of the outer shell and the valve seat jointly form a medium flow channel. The ball is provided with a tapered hole corresponding to the medium flow channel at a height corresponding to the medium flow channel. The bottom of the tapered hole is detachably provided with a measurement pad through a locking piece. The hole wall of the tapered hole and one end of the measurement pad jointly enclose a volume measurement cavity. The volume of the volume measurement cavity can be changed by replacing measurement pads of different sizes, so as to realize the change of the measurement volume of the measuring ball valve.

[0006] Further, the measurement pad is in the form of a tapered cylindrical structure, and the outer wall of the measurement pad is in conformal cooperation with the hole wall of the tapered hole.

[0007] Further, the metering pad comprises a metering end in the volume metering cavity and a mounting end matched with the bottom of the tapered hole, the diameter of the metering end is larger than that of the mounting end.

[0008] Further, the bottom of the tapered hole is provided as a flat surface, the mounting end is correspondingly provided as a mounting flat surface, and the metering end is provided as an inner concave curved surface.

[0009] Further, the bottom of the inner concave curved surface is provided with a counter-sunk hole penetrating through the left and right sides of the metering pad, the counter-sunk hole is shaped with the locking piece, and the ball is provided with a threaded hole at a position corresponding to the counter-sunk hole.

[0010] Further, the outer diameters of the metering pad and the locking piece are smaller than the diameter of the medium flow channel, so that the metering pad can be replaced by screwing the locking piece in or out of the tapered hole from the medium flow channel with a screwdriver.

[0011] Further, the valve seat comprises a sealing surface in contact with the ball to realize sealing and a first contact surface in contact with the outer shell body and horizontally arranged and a second contact surface vertically arranged.

[0012] Further, the sealing surface is provided with an annular protrusion in contact with the ball to realize sealing, the first contact surface is provided with a containing groove and a wedge-shaped groove, the containing groove is provided with an O-ring, the wedge-shaped groove is provided with a wedge-shaped sealing ring, the outer side of the wedge-shaped sealing ring is provided with a pressing ring pressing on the wedge-shaped sealing ring, the outer side of the pressing ring is provided with a disc spring set pressing on the pressing ring, and a floating gap is arranged between the disc spring set and the second contact surface to allow the disc spring set to float left and right.

[0013] Further, the outer shell body comprises a valve body and valve caps arranged on both sides of the valve seat, the upper end of the valve body is provided with a stuffing box, and the stuffing box is provided with a packing to realize gap sealing between the valve body and the valve stem.

[0014] Further, a valve cavity filler is arranged between the valve body and the ball to realize sealing between the ball and the valve body, the valve cavity filler comprises a first filler sleeved on the left side of the ball and the valve stem and a second filler sleeved on the right side of the ball and the valve stem, and the first filler and the second filler are left-right symmetrical.

[0015] Compared with the prior art, the beneficial effects of the variable volume high frequency metering ball valve are as follows:

[0016] (1) only need to change the volume of the metering volume of the metering cavity can be measured different volume of material, the volume of the metering cavity can be completed by changing the size of the metering pad, reduce the length of the metering pad, can make the volume of the volume of the metering cavity increases, increase the length of the metering pad, can make the volume of the volume of the metering cavity will reduce, therefore, by changing the size of the volume of the metering pad to change the volume of the metering cavity can be achieved by changing the volume of the metering ball valve, more versatile, more flexible, by changing the size of the metering pad can be measured different volume of material;

[0017] (2) the outer diameter of the metering pad and locking piece is smaller than the diameter of the medium flow channel, therefore, the locking piece and the metering pad can be directly screwed out from the tapered hole of the ball body by using a screwdriver in the medium flow channel, and then the metering pad and the locking piece with different sizes can be screwed into the tapered hole of the ball body through the medium flow channel, so as to realize the replacement of the metering pad, the metering pad with different lengths can be replaced without disassembling the outer shell, the replacement of the metering pad is simple and convenient, the replacement time can be greatly shortened, and the sealing failure problem caused by multiple disassembly and assembly of the outer shell can be avoided;

[0018] (3) the metering pad comprises a metering end located in the volume metering cavity and an installation end matched and installed with the bottom of the tapered hole, the bottom of the tapered hole is provided as a flat surface, and the corresponding installation end is provided as an installation flat surface, so that the installation end and the bottom of the tapered hole are matched and positioned, thereby facilitating the installation and fixation between the metering pad and the ball body; the metering end in contact with the material is provided as an inner concave arc surface, which can prevent the material from accumulating, and compared with the cylindrical hole in the prior art, the inner concave arc surface is more accurate in metering and can solve the problem that the corners in the cylindrical hole cannot be completely filled.

BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a sectional view structure schematic diagram of the variable volume high frequency metering ball valve of the embodiment of the present application;

[0020] Figure 2 It is a sectional view structure schematic diagram of the variable volume high frequency metering ball valve of the embodiment of the present application Figure 1 It is an enlarged structure schematic diagram of the local part A of the embodiment of the present application;

[0021] Figure 3 It is a sectional view structure schematic diagram of the metering pad of the embodiment of the present application;

[0022] Figure 4 It is a sectional view structure schematic diagram of the metering pad of the embodiment of the present application;

[0023] Figures in the drawing represent:

[0024] 100 - variable volume high frequency metering ball valve;

[0025] 1-outer housing, 11-valve body, 12-valve cap, 13-stuffing box, 14-stuffing, 15-first filling, 16-second filling;

[0026] 2-ball, 21-conical hole; 3-valve stem;

[0027] 4-valve seat, 41-sealing surface, 42-first contact surface, 421-receiving groove, 422-wedge-shaped groove, 43-second contact surface, 44-annular protrusion, 45-O-ring, 46-wedge-shaped sealing ring, 47-pressing ring, 48-disc spring group;

[0028] 5-medium flow channel; 6-locking piece;

[0029] 7-measuring pad, 71-measuring end, 711-internal concave curved surface, 72-mounting end, 721-mounting plane, 73-countersunk hole;

[0030] 8-volumetric measurement cavity.

DETAILED DESCRIPTION

[0031] Please refer to Figures 1-4 , the embodiment is a variable volume high frequency measuring ball valve 100, a variable volume high frequency measuring ball valve 100 includes an outer housing 1, a ball 2 arranged in the inner cavity of the outer housing 1, a valve stem 3 connected to the ball 2 and driving the ball 2 to rotate, and a valve seat 4 realizing the gap sealing between the outer housing 1 and the ball 2, the inner cavity of the outer housing 1 and the valve seat 4 forms a medium flow channel 5 together, the ball 2 is provided with a conical hole 21 corresponding to the height position of the medium flow channel 5 on one side, the conical hole 21 is detachably provided with a measuring pad 7 through a locking piece 6, the hole wall of the conical hole 21 and one end of the measuring pad 7 together form a volumetric measurement cavity 8, the volume of the volumetric measurement cavity 8 is changed by replacing the measuring pad 7 of different sizes, so as to realize the change of the measuring volume of the measuring ball valve.

[0032] In the embodiment, the locking piece 6 is a bolt, in other embodiments, the locking piece can be set according to the actual situation, and the locking piece 6 and the measuring pad 7 can also be set as an integral structure, which is not limited here.

[0033] The measuring pad 7 is a whole conical cylindrical structure, and the outer wall of the measuring pad 7 is shaped and matched with the hole wall of the conical hole 21, and the outer wall of the measuring pad 7 and the hole wall of the conical hole 21 are in a sealed state without floating gap, which ensures that the material entering the ball 2 is in the volumetric measurement cavity 8, thereby ensuring the accuracy of the measurement.

[0034] The metering pad 7 comprises a metering end 71 located in the volumetric metering cavity 8 and a mounting end 72 mounted in cooperation with the bottom of the tapered hole 21, the diameter of the metering end 71 is larger than that of the mounting end 72. The bottom of the tapered hole 21 is provided as a flat surface, and the corresponding mounting end 72 is provided as a mounting flat surface 721, facilitating the cooperation and positioning of the mounting end 72 with the bottom of the tapered hole 21, thereby facilitating the installation and fixation between the metering pad 7 and the ball 2. The metering end 71 is provided as an inner concave arc surface 711, and the inner concave arc surface 711 is provided at the contact end of the metering pad 7 with the material, which can prevent the material from accumulating, and compared with the cylindrical hole in the prior art, the inner concave arc surface 711 is more accurate in metering, and can also solve the problem that the corners in the cylindrical hole cannot be completely filled.

[0035] The bottom of the inner concave arc surface 711 is provided with a countersunk hole 73 penetrating through the left and right sides of the metering pad 7, and the countersunk hole 73 is shaped in cooperation with the locking piece 6. Correspondingly, the ball 2 is provided with a threaded hole at a position corresponding to the countersunk hole 73, and the outer periphery of the locking piece 6 is provided with external threads. The upper end of the locking piece 6 is inserted into the countersunk hole 73, and at the same time, the bottom of the locking piece 6 is inserted into the threaded hole, thereby achieving the installation and fixation of the metering pad 7 on the ball 2.

[0036] If it is necessary to measure different volumes of material, it is only necessary to change the metering volume of the volumetric metering cavity 8, and the metering volume of the volumetric metering cavity 8 can be achieved by replacing metering pads 7 of different sizes. Here, the size of the metering pad 7 is changed, mainly by changing the length of the metering pad 7. Of course, the diameter of the metering pad 7 also needs to be shaped and matched with the tapered hole 21 of the ball 2, and the size of the locking piece 6 can also be adaptively changed. After changing the length of the metering pad 7, the volume of the volumetric metering cavity 8 changes correspondingly. Specifically, if the length of the metering pad 7 is reduced, the metering volume of the volumetric metering cavity 8 increases, and if the length of the metering pad 7 is increased, the metering volume of the volumetric metering cavity 8 will decrease. Therefore, by replacing metering pads 7 of different lengths to change the volume of the volumetric metering cavity 8, the change of the metering volume of the ball valve can be realized.

[0037] In order to facilitate the quick replacement of metering pads 7 of different sizes, the outer diameters of the metering pad 7 and the locking piece 6 are smaller than the diameter of the medium flow channel 5, so that the locking piece 6 and the metering pad 7 can be directly screwed out of the tapered hole 21 of the ball 2 from the medium flow channel 5 using a screwdriver, and then other metering pads 7 of different sizes and the locking piece 6 can be screwed into the tapered hole 21 of the ball 2 through the medium flow channel to achieve the replacement of the metering pad 7. Without disassembling the outer shell 1, the metering pad 7 of different lengths can be replaced, and the replacement of the metering pad 7 is simple and convenient, which can not only shorten the installation time, but also avoid the problem of sealing failure caused by multiple disassembly and assembly of the outer shell 1.

[0038] The metering process of the metering ball valve is as follows: the material flows into the volume metering cavity 8 through the medium flow channel 5 on one side, the valve stem 3 drives the ball 2 to rotate 180°, the volume metering cavity 8 is rotated to be communicated with the medium flow channel 5 on the other side, and the material in the volume metering cavity 8 flows into the medium flow channel 5 on the other side, so as to realize the metering process of the material. In order to make the material in the volume metering cavity 8 quickly flow into the medium flow channel 5, preferably, the volume metering cavity 8 is arranged upward, after the valve stem 3 drives the ball 2 to rotate 180°, the volume metering cavity 8 is arranged downward, and the material in the volume metering cavity 8 can quickly flow into the medium flow channel 5 by relying on its own gravity. In other embodiments, the arrangement direction of the volume metering cavity 8 is set according to the actual situation, which is not limited herein.

[0039] The valve seat 4 comprises a sealing surface 41 in contact with the ball 2 to realize sealing, a first contact surface 42 in contact with the outer shell 1 and horizontally arranged, and a second contact surface 43 vertically arranged.

[0040] In order to improve the sealing effect between the valve seat 4 and the ball 2, the sealing surface 41 is provided with an annular protrusion 44 which is first in contact with the ball 2 to realize sealing. The ball 2 is first in contact with the annular protrusion 44 to realize sealing, and after the extrusion force of the ball 2 is increased, the ball 2 extrudes the annular protrusion 44 to realize complete contact with the sealing surface 41 to realize sealing. Compared with ordinary planar contact, the annular protrusion 44 can obviously increase the elastic deformation amount after being extruded, improve the sealing effect between the valve seat 4 and the ball 2, and also can enhance the bearing capacity of the valve seat 4, so as to reduce the wear of the valve seat 4 and prolong the service life of the valve seat 4.

[0041] The first contact surface 42 is provided with a containing groove 421 and a wedge-shaped groove 422, the containing groove 421 is provided with an O-ring 45, the wedge-shaped groove 422 is provided with a wedge-shaped sealing ring 46, the outer side of the wedge-shaped sealing ring 46 is provided with a pressing ring 47 which is pressed on the wedge-shaped sealing ring 46, and the outer side of the pressing ring 47 is provided with a disc spring set 48 which is pressed on the pressing ring 47. The disc spring set 48 provides a pre-tightening force for the valve seat 4 to realize the sealing between the valve seat 4 and the ball 2, and a floating gap is arranged between the disc spring set 48 and the second contact surface 43 for the left and right floating of the disc spring set 48. The O-ring 45 and the wedge-shaped sealing ring 46 can support the valve seat 4 to prevent the valve seat 4 from moving up and down, and can improve the sealing of the first contact surface 42. The wedge-shaped sealing ring 46 and the wedge-shaped groove 422 are in conformal cooperation, and the sealing of the wedge-shaped sealing ring 46 is realized through the wedge-shaped structure. When the disc spring set 48 realizes the sealing between the valve seat 4 and the ball 2 by pressing the wedge-shaped sealing ring 46 through the pressing of the pressing ring 47, the wedge-shaped structure cooperation can reduce the deformation stress of the wedge-shaped sealing ring 46, reduce the cold flow and wear of the wedge-shaped sealing ring 46, the material of the wedge-shaped sealing ring 46 is graphite, which is more stable and reliable, can improve the sealing effect between the valve seat 4 and the outer shell 1, and improve the service life of the ball valve.

[0042] The outer housing 1 comprises a valve body 11 and valve caps 12 arranged on both sides of the valve body 11, and the upper end of the valve body 11 is provided with a stuffing box 13, and the stuffing box 13 is provided with a stuffing 14 for realizing the gap sealing between the valve body 11 and the valve stem 3.

[0043] In order to ensure the accuracy of the metering, it is necessary to ensure the sealing between the ball 2, the valve stem 3 and the valve body 11, therefore, the valve cavity filler is arranged between the valve body 11 and the ball 2 to realize the sealing between the ball and the valve body 11. The valve cavity filler comprises a first filler 15 sleeved on the left side of the ball 2 and the valve stem 3 and a second filler 16 sleeved on the right side of the ball and the valve stem 3, and the first filler 15 and the second filler 16 are symmetrical to each other, the gap between the ball 2, the valve stem 3 and the valve body 11 is filled, the structure design without gap in the valve cavity is realized, the material falling into the valve cavity when the ball 2 rotates can be avoided, the gap sealing between the ball 2, the valve stem 3 and the valve body 11 is improved, and the metering accuracy of the metering ball valve is improved.

[0044] The above only describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept, a number of modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A variable volume high frequency metering ball valve characterized by: It includes an outer shell, a ball arranged in the inner cavity of the outer shell, a valve stem connected to the ball and driving the ball to rotate, and a valve seat achieving gap sealing between the outer shell and the ball, the inner cavities of the outer shell and the valve seat jointly forming a medium flow channel, one side of the ball being provided with a tapered hole in communication with the medium flow channel at a height corresponding to the medium flow channel, the bottom of the tapered hole being detachably provided with a metering pad by a locking piece, the hole wall of the tapered hole and one end of the metering pad jointly enclosing a volume metering cavity, the volume of the volume metering cavity being able to be changed by replacing metering pads of different sizes to achieve the change of the metering volume of the metering ball valve.

2. A variable volume high frequency metering ball valve as defined in claim 1, characterized in that: The metering pad is entirely in a tapered cylindrical structure, and the outer wall of the metering pad is in profiled cooperation and sealing with the hole wall of the tapered hole.

3. A variable volume high frequency metering ball valve as defined in claim 1, characterized in that: The metering pad includes a metering end in the volume metering cavity and a mounting end cooperatively mounted with the bottom of the tapered hole, the diameter of the metering end being greater than the diameter of the mounting end.

4. A variable volume high frequency metering ball valve as defined in claim 3, characterized in that: The bottom of the tapered hole is provided as a flat surface, the mounting end is correspondingly provided as a mounting flat surface, and the metering end is provided as an inner concave arc surface.

5. A variable volume high frequency metering ball valve as defined in claim 4, characterized in that: The bottom of the inner concave arc surface is provided with a countersunk hole penetrating through the left and right sides of the metering pad, the countersunk hole is profiled with the locking piece, and the ball is provided with a threaded hole at a position corresponding to the countersunk hole.

6. A variable volume high frequency metering ball valve as defined in claim 1, wherein: The outer diameters of the metering pad and the locking piece are both smaller than the diameter of the medium flow channel, so that the locking piece and the metering pad can be screwed in or out of the tapered hole from the medium flow channel by using a screwdriver to facilitate the replacement of the metering pad.

7. A variable volume high frequency metering ball valve as defined in claim 1, wherein: The valve seat includes a sealing surface in contact with the ball to achieve sealing, a first contact surface in contact with the outer shell and horizontally arranged, and a second contact surface vertically arranged.

8. A variable volume high frequency metering ball valve as defined in claim 7, characterized in that: The sealing surface is provided with an annular protrusion in contact with the ball to achieve sealing first, the first contact surface is provided with a receiving groove and a wedge-shaped groove, the receiving groove is provided with an O-ring, the wedge-shaped groove is provided with a wedge-shaped sealing ring, the outer side of the wedge-shaped sealing ring is provided with a compression ring compressed on the wedge-shaped sealing ring, the outer side of the compression ring is provided with a disc spring set compressed on the compression ring, and a floating gap is provided between the disc spring set and the second contact surface for the left and right floating of the disc spring set.

9. A variable volume high frequency metering ball valve as defined in claim 1, wherein: The outer shell includes a valve body and valve caps arranged on both sides of the valve seat, the upper end of the valve body is provided with a stuffing box, and the stuffing box is provided with a packing for achieving gap sealing between the valve body and the valve stem.

10. A variable volume high frequency metering ball valve as defined in claim 9, characterized in that: A valve cavity filler is arranged between the valve body and the ball to achieve sealing between the ball and the valve body, the valve cavity filler includes a first filler sleeved on the left side of the ball and the valve stem and a second filler sleeved on the right side of the ball and the valve stem, and the first filler and the second filler are left-right symmetrical.

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