CN209781726U

CN209781726U - Ball valve

Info

Publication number: CN209781726U
Application number: CN201920218491.5U
Authority: CN
Inventors: 何泽淼
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-02-13
Filing date: 2019-02-13
Publication date: 2019-12-13
Anticipated expiration: 2029-02-13

Abstract

The utility model provides a ball valve comprises pivot sealing washer, the pivot, the valve body, little valve liner, the case, the valve liner, the sealing washer, the valve gap, through the improvement to ball valve case chamber, the narrow passageway that overflows has been add on traditional case cylinder diameter's basis promptly, make the change of ball valve flow in the small flow region slowed down, the narrow passageway that overflows for setting up at case cross the central plane, from the slot of the one end drill way of case to the extension of other end drill way slant, make the remaining arc surface after the slot cutting still be enough to shutoff valve closed diameter when rotatory. The opening and closing angle of the ball valve is adjusted according to the working condition, compared with the prior ball valve technology, the flow characteristic of the ball valve expands the small flow regulation and control interval, so that the control of small flow change is facilitated, the reversing switching of flowing media of a pipeline can be met, and the throttling of a system and the flow regulation and control in a local range can be realized.

Description

Ball valve

Technical Field

The utility model relates to a ball valve.

Background

The ball valve has the advantages of small fluid resistance, compact structure, good sealing performance, flexible operation, convenient maintenance and the like, and is widely applied to engineering. The existing ball valve is characterized in that the valve core structure is divided into an O-shaped ball valve and a V-shaped ball valve, the valve core of the O-shaped ball valve is a sphere, the structure is symmetrical, the stability is good, and a valve rod or a power head drives a rotating shaft to make 90-degree circuitous motion so as to realize the opening or closing of the valve. However, the slope of the flow characteristic curve of the O-shaped ball valve is relatively steep, and the regulation and control of the flow change are not easy to grasp, so the O-shaped ball valve is mainly used for cutting off, distributing and changing the flow direction of the medium in a pipeline. With the development of valve technology, the latter V-shaped ball valve has the functions of throttling and controlling flow, but because the valve core structure of the V-shaped ball valve is only a hollow ball shell of a quarter of a ball, and is limited by the influence of processing technology, heat treatment, mechanical properties and the like, the V-shaped ball valve is not suitable for the occasions of reversing and switching flowing media. How to combine the advantages of the O-shaped ball valve and the V-shaped ball valve is continuously endeavored.

Disclosure of Invention

In order to solve the problem, the utility model discloses effectual improvement has been made to the chamber of ball valve case to open and close the angle according to operating mode adjustment ball valve, the current ball valve technique of its flow characteristics ratio has expanded the miniflow regulation and control interval, in order to do benefit to the control that the miniflow changes. The utility model discloses can satisfy the switching-over of pipeline flowing medium and switch, can realize the flow regulation and control of system's throttle and local scope.

The utility model is realized in such a way, the valve comprises a rotating shaft sealing ring, a rotating shaft, a valve body, a small valve liner, a valve core, a valve liner, a sealing ring and a valve cover, wherein the valve body is approximately a tubular part with a through center, one end of the valve body is provided with a thread to be connected with a pipe, the other end of the valve body is provided with a thread to be connected with the valve cover, the center of the valve body is provided with a step for installing the small valve liner, and a cavity for installing; at installation case position department, be equipped with the shoulder hole that the perpendicular to valve body axis supplied the installation pivot, the cambered surface ream ladder counter bore of pivot mounting hole inner end, pivot mounting hole outer end is equipped with the location step, is equipped with the boss of installation unit head, is equipped with the screw hole that supplies the connection usefulness on the boss plane. The valve cover is similar to a threaded sleeve with steps, external threads at one end are fixedly connected with the valve body, valve liner mounting steps are arranged on the inner side of the hole, and internal threads are arranged at the other end and connected with a pipe. The appearance of the valve core is spherical, a narrow flow passage is additionally arranged on the basis of the traditional cylindrical drift diameter in the central cavity system, so that the change of the flow of the ball valve is relieved in a small flow area, the narrow flow passage is arranged on a drift plane of the valve core, a thin groove which is expanded from an orifice at one end of the valve core to an orifice at the other end of the valve core in a slant way is formed, and the residual circular arc surface after the thin groove is cut is still enough to block the closed drift diameter of the valve when rotating. A groove for transmitting the torque of the rotating shaft is arranged at the position where the valve core passes through the center and is vertical to the cutting plane of the fine groove. The rotating shaft is a stepped shaft, the large-diameter end of the rotating shaft is matched with a shoulder of a counter bore at the inner end of a stepped hole of the valve body, and the end part of the rotating shaft is provided with a flat force for transmitting torque; the pitch diameter is in movable fit with the middle section of the valve body stepped hole and is provided with a groove for mounting a rotating shaft sealing ring; the other end is provided with a groove for transmitting torque with the power head, and the groove can be changed into a flat shape or a square tenon when the valve rod is adopted for driving.

Assembling: and after the small valve bush is buckled with the sealing ring, the small valve bush is arranged in the valve body, the rotating shaft is buckled with the rotating shaft sealing ring and then is arranged in the rotating shaft mounting hole from the inside to the outside from the valve body cavity, the end part of the rotating shaft is flat and parallel to the central line of the valve body, the valve core is arranged in the valve body, the flat part of the rotating shaft falls into the groove of the valve core, and then the valve cover provided with the sealing ring.

Drawings

The present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a front view of the present invention along the axis of the rotating shaft.

3 fig. 3 2 3 is 3 a 3 view 3 a 3- 3 a 3 of 3 fig. 3 1 3. 3

Fig. 3 is a view B-B of fig. 2.

Fig. 4 is a view C-C of fig. 2.

Fig. 5 is a front view of the valve core of the present invention along the drift diameter direction.

Fig. 6 is a top view of fig. 5.

Fig. 7 is a left side view of fig. 5.

Fig. 8 is a view E-E of fig. 5.

Fig. 9 is a view from D-D of fig. 6.

Fig. 10 is a view F-F of fig. 5.

Fig. 11 is a three-dimensional view of the valve cartridge.

FIG. 12 is a schematic flow characteristic of an O-ring ball valve.

Fig. 13 is a schematic view of the flow characteristic curve of the ball valve of the present invention.

In the figure 1, a rotating shaft sealing ring; 2. a rotating shaft; 3. a valve body; 4. a small valve liner; 5. a valve core; 6. a valve liner; 7. a seal ring; 8. a valve cover; q, ball valve flow; alpha, ball valve opening.

Detailed Description

The utility model consists of a rotary shaft sealing ring (1), a rotary shaft (2), a valve body (3), a small valve liner (4), a valve core (5), a valve liner (6), a sealing ring (7) and a valve cover (8), wherein the valve body (3) is approximately a tubular part with a through center, one end is provided with a thread and is connected with a pipe, the other end is provided with a thread and is connected with the valve cover (8), the center of the valve body (3) is provided with a step for installing the small valve liner (4), and a cavity for installing the valve core (5) is arranged; at installation case (5) position department, be equipped with the shoulder hole that perpendicular to valve body (3) axis supplied installation pivot (2), the cambered surface reaming ladder counter bore of pivot (2) mounting hole inner end, pivot (2) mounting hole outer end is equipped with the location step, is equipped with the boss of installation unit head, is equipped with the screw hole that supplies to connect the usefulness on the boss plane. The valve cover (8) is similar to a threaded sleeve with steps, external threads at one end are fixedly connected with the valve body (3), valve liner (6) installation steps are arranged on the inner side of the hole, and internal threads are arranged at the other end and connected with a pipe. The appearance of the valve core (5) is spherical, a narrow flow passage is additionally arranged on the basis of the traditional cylindrical hole in the central cavity system, so that the change of the flow of the ball valve is relieved in a small flow area, the narrow flow passage is arranged on a central plane of the valve core (5), a narrow groove which is expanded from an orifice at one end of the valve core (5) to an orifice at the other end in a slant way is formed, and the residual arc surface after the narrow groove is cut is still enough to block the closed path of the valve when rotating. A groove for transmitting the torque of the rotating shaft is arranged at the position where the valve core (5) passes through the center and is vertical to the cutting plane of the fine groove. The rotating shaft (2) is a stepped shaft, the large diameter end of the rotating shaft is matched with a shoulder of a counter bore at the inner end of a stepped hole of the valve body (3), and the end part of the rotating shaft is provided with a flat force for transmitting torque; the pitch diameter is in movable fit with the middle section of the stepped hole of the valve body (3) and is provided with a groove for mounting the rotating shaft sealing ring (1); the other end is provided with a groove for transmitting torque with the power head, and the groove can be changed into a flat shape or a square tenon when the valve rod is adopted for driving.

Assembling: the small valve liner (4) is buckled with a sealing ring (7) and then is arranged in the valve body (3), a rotating shaft mounting hole is formed in the cavity of the valve body (3) from inside to outside after the rotating shaft (2) is buckled with the rotating shaft sealing ring (1), the end part of the rotating shaft (2) is parallel to the central line of the valve body (3), the valve core (5) is arranged in the valve body (3), the rotating shaft (2) is made to fall into a groove of the valve core (5), and then the valve cover (8) provided with the sealing ring (7) and the valve liner (6) is screwed.

Claims

1. A ball valve is characterized by comprising a rotating shaft sealing ring, a rotating shaft, a valve body, a small valve liner, a valve core, a valve liner, a sealing ring and a valve cover, wherein the valve body is approximately a tubular part with a through center, one end of the valve body is provided with a thread to be connected with a pipe, the other end of the valve body is provided with a thread to be connected with the valve cover, the center of the valve body is provided with a step for mounting the small valve liner, and a cavity for mounting the valve core; a stepped hole which is perpendicular to the valve body axis and is used for installing a rotating shaft is arranged at the position for installing the valve core, the cambered surface at the inner end of the rotating shaft installing hole is reamed into the stepped counter bore, a positioning step is arranged at the outer end of the rotating shaft installing hole, a boss for installing a power head is arranged, and a threaded hole for connection is arranged on the boss plane; the valve cover is similar to a threaded sleeve with steps, external threads at one end are fixedly connected with the valve body, valve liner mounting steps are arranged on the inner side of the hole, and internal threads at the other end are connected with a pipe; the rotating shaft is a stepped shaft, the large-diameter end of the rotating shaft is matched with a shoulder of a counter bore at the inner end of a stepped hole of the valve body, and the end part of the rotating shaft is provided with a flat force for transmitting torque; the pitch diameter is in movable fit with the middle section of the valve body stepped hole and is provided with a groove for mounting a rotating shaft sealing ring; the other end is provided with a groove for transmitting torque with the power head, and the groove can be changed into a flat shape or a square tenon when the valve rod is adopted for driving.

2. The ball valve according to claim 1, wherein the valve core is spherical in shape, the central cavity is additionally provided with a narrow flow passage on the basis of the traditional cylindrical passage, the narrow flow passage is arranged on a valve core passing central plane, a narrow groove which is obliquely expanded from an orifice at one end of the valve core to an orifice at the other end of the valve core is provided, the remaining arc surface after the narrow groove is cut is still enough to block the closed passage of the valve when rotating, and a groove for transmitting the torque of the rotating shaft is arranged at the position where the valve core passes through the center and is vertical to the cutting plane of the narrow groove.