CN215445146U

CN215445146U - High-pressure ball valve

Info

Publication number: CN215445146U
Application number: CN202121544862.2U
Authority: CN
Inventors: 杨新; 葛本祥
Original assignee: Juchuang Shanghai Fluid Technology Co ltd
Current assignee: Juchuang Shanghai Fluid Technology Co ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2022-01-07
Anticipated expiration: 2031-07-07

Abstract

The utility model discloses a high-pressure ball valve. The high-pressure ball valve comprises a double-cavity valve body and a linkage valve core assembly, wherein the linkage valve core assembly is arranged in the double-cavity valve body through a valve rod, and one end of the valve rod is connected with a driving piece outside the double-cavity valve body; the double-cavity valve body comprises a high-pressure valve cavity and a low-pressure valve cavity which are communicated with each other, and a valve seat provided with a throttling hole is further arranged between the high-pressure valve cavity and the low-pressure valve cavity; the linkage valve core assembly comprises a ball valve core, an eccentric valve core and a throttle valve core. The linkage valve core assembly is controlled by the valve rod to rotate in the double-cavity valve body, the linkage valve core assembly is used for controlling the connection and disconnection between the high-pressure valve cavity and the low-pressure valve cavity of the double-cavity valve body so as to control the diversion of high-pressure media, the high-pressure media flowing into the flow inlet are subjected to multi-valve core throttling control, the pressure resistance is high, the linkage valve core assembly resists the impact of the high-pressure media, the valve leakage is avoided, and the reliability of the high-pressure ball valve is improved.

Description

High-pressure ball valve

Technical Field

The utility model relates to the technical field of hydraulic equipment, in particular to a high-pressure ball valve.

Background

The high-pressure ball valve is mainly used as a hydraulic switch of hydraulic equipment to block or guide media such as hydraulic oil, natural gas and the like. The high-pressure ball valve can be matched with other equipment for use, but in actual use, the high-pressure ball valve is listed in the range of a vulnerable part due to short service life and needs to be replaced regularly. The reason is that the conventional high-pressure ball valve usually depends on a two-way fixed ball body arranged in a valve body as a valve core, and the ball body rotates in the valve body, so that whether a through hole penetrating through the ball body communicates an inflow end and an outflow end is used as a basis for opening and closing the high-pressure ball valve. However, due to the impact of the high-pressure medium, the single ball serving as the valve core has the defects of insufficient shock resistance and poor strength, and during the use process, the leakage condition is easy to occur, and the high-pressure medium cannot be discharged from the outflow end after being throttled.

SUMMERY OF THE UTILITY MODEL

The utility model provides a high-pressure ball valve, aiming at solving the technical problems that the existing high-pressure ball valve is insufficient in impact resistance, easy to leak and free of a throttling function.

The utility model is realized by adopting the following technical scheme: a high-pressure ball valve comprises a double-cavity valve body and a linkage valve core assembly, wherein the linkage valve core assembly is installed in the double-cavity valve body through a valve rod, and one end of the valve rod is connected with a driving piece outside the double-cavity valve body; the double-cavity valve body comprises a high-pressure valve cavity and a low-pressure valve cavity which are communicated with each other, and a valve seat provided with a throttling hole is further arranged between the high-pressure valve cavity and the low-pressure valve cavity;

the linkage valve core assembly comprises: the ball valve core is fixed on the valve rod in the high-pressure valve cavity, and a flow guide channel for communicating an inflow port on one side of the high-pressure valve cavity with a cut-off hole in the valve seat is arranged on the ball valve core; the eccentric valve core is fixed on the valve rod in the low-pressure valve cavity and used for plugging an outflow port on one side of the low-pressure valve cavity when rotating along with the valve rod; and the throttling valve core is arranged on the valve rod between the valve seat and the eccentric valve core in a sliding manner and is used for plugging a throttling hole communicated with a flow guide channel of the ball valve core.

According to the high-pressure ball valve, the valve rod is adopted to control the linkage valve core assembly to rotate in the double-cavity valve body, the linkage valve core assembly is used to control the connection and disconnection between the high-pressure valve cavity and the low-pressure valve cavity of the double-cavity valve body, so that the flow guide of a high-pressure medium is controlled, the high-pressure medium flowing into the flow inlet is subjected to multi-valve-core throttling control, the pressure resistance is high, the linkage valve core assembly resists the impact of the high-pressure medium, the valve leakage is avoided, and the reliability of the high-pressure ball valve is improved.

As a further improvement of the above scheme, the valve rod is followed the axis direction setting of two-chamber valve body, still be equipped with the valve gap that is used for the valve rod to wear out in order to connect the driving piece on the two-chamber valve body one, valve gap one is fixed in high-pressure valve chamber one side on the two-chamber valve body, the valve rod with be equipped with the sealing washer between the valve gap one.

Furthermore, a valve cover II is further arranged on the double-cavity valve body on one side of the low-pressure valve cavity and fixed on the double-cavity valve body, and a valve shaft connected with the eccentric valve core is further arranged on the inner side wall of the valve cover II.

Further, the eccentric valve core is installed between the valve rod and the valve shaft, and the valve rod and the valve shaft are arranged on the same axis; when the linkage valve core assembly is used for guiding or plugging the flow in the double-cavity valve body, the valve rod, the linkage valve core assembly and the valve shaft are driven to rotate by rotating the driving piece, and the flow inlet and the flow outlet of the double-cavity valve body can be switched on or plugged and closed by the linkage valve core assembly.

As a further improvement of the above scheme, the ball valve core is a ball body arranged in the high-pressure valve cavity, an inner bushing abutting against the outer side wall of the ball body is arranged on the inner side wall of the high-pressure valve cavity, and a through hole communicated with the flow guide channel in the ball valve core is arranged on one side of the ball body.

As a further improvement of the above scheme, the valve rod is arranged to penetrate through the ball valve core, and the flow guide channel is arranged between the valve rod and the inner side wall of the ball valve core.

As a further improvement of the above scheme, the ball valve core is a one-way fixed ball, the flow guide channel is an n-type flow guide channel, a through hole on the one-way fixed ball is communicated with one side of the n-type flow guide channel, the n-type flow guide channel is communicated with the throttle hole, and when the ball valve core rotates to enable the through hole on the ball valve core to be communicated with the inflow port, the high-pressure medium flowing in from the inflow port can be guided to the throttle hole through the n-type flow guide channel.

Further, the throttling hole is arranged between the valve seat and the valve rod and communicated with the flow guide channel.

Furthermore, the throttle valve core is fixed on a throttle valve sleeve, a spring which is abutted against the eccentric valve core is arranged in the throttle valve sleeve, the spring is used for applying elastic force to the throttle valve sleeve to move towards the valve seat along the valve rod, and the throttle valve core is abutted against the valve seat; only when the pressure of the high-pressure medium guided to the throttling hole on the throttling valve core is larger than the elastic force of the spring, the throttling valve core can be pushed to be separated from the valve seat, so that the high-pressure medium flows into the low-pressure valve cavity.

As a further improvement of the above scheme, the eccentric valve core is in a C-shaped structure, and a sealing ring for abutting against the eccentric valve core is arranged on the end surface of the outlet on one side of the low-pressure valve cavity; when the ball valve core rotates to the position that the through hole is communicated with the inflow port, the eccentric valve core also rotates to the position staggered with the end face of the outflow port, so that the outflow port is communicated with the low-pressure valve cavity to guide and discharge the medium flowing into the low-pressure valve cavity, and the flow of the medium flowing in and out can be adjusted by adjusting the area size of the through hole in the ball valve core communicated with the inflow port and the area size of the eccentric valve core staggered with the end face of the outflow port.

Drawings

Fig. 1 is a schematic structural view of a closed state of the high pressure ball valve of the present invention.

Fig. 2 is a schematic structural view of a linkage valve core assembly of the high-pressure ball valve in fig. 1.

Fig. 3 is a schematic structural view of a dual chamber valve body of the high pressure ball valve of fig. 1.

Fig. 4 is a schematic structural view of a ball valve core of the high pressure ball valve of fig. 1.

Fig. 5 is a structural diagram illustrating the open state of the high-pressure ball valve according to the present invention.

Description of the symbols:

1-double-cavity valve body, 2-high-pressure valve cavity, 3-low-pressure valve cavity, 4-inflow port, 5-outflow port, 6-valve seat, 7-valve cover I, 8-valve cover II, 9-valve rod, 10-sealing ring, 11-opening and closing hand wheel, 12-inner bushing, 13-ball valve core, 14-one-way fixing ball, 15-n type flow guide channel, 16-throttling valve core, 17-throttling hole, 18-throttling valve sleeve, 19-spring, 20-eccentric valve core, 21-sealing ring and 22-valve shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Referring to fig. 1 and 5, the present invention provides a high pressure ball valve, which includes a dual-chamber valve body 1 and a linkage valve core assembly, wherein the linkage valve core assembly is installed in the dual-chamber valve body 1 through a valve rod 9, and one end of the valve rod 9 is connected to a driving member outside the dual-chamber valve body 1. In an embodiment of the present invention, the driving member is an opening and closing hand wheel 11 installed on the valve rod 9, and when the linkage valve core assembly is operated, the opening and closing hand wheel 11 is rotated to drive the valve rod 9 to rotate. In other embodiments of the present invention, the driving element may also be a servo motor, and the servo motor drives the valve rod 9 to rotate, so as to adjust the opening and closing of the high-pressure ball valve.

Unlike the conventional high-pressure ball valve, the present invention is not limited to a two-way fixed ball as a valve core in the valve cavity of the high-pressure ball valve, and referring to fig. 1, 3 and 5, the dual-cavity valve body 1 includes a high-pressure valve cavity 2 and a low-pressure valve cavity 3 communicated with each other, and a valve seat 6 with an orifice 17 is further installed between the high-pressure valve cavity 2 and the low-pressure valve cavity 3. The linkage valve core assembly is arranged in the double-cavity valve body 1 between the inflow port 4 and the outflow port 5, and is used for the valve rod 9 installed by the linkage valve core assembly to be arranged along the axis direction of the double-cavity valve body 1.

In an embodiment of the present invention, please refer to fig. 1 and fig. 2, the top of the valve rod 9 penetrates through a first valve cover 7 to connect with a driving member, the first valve cover 7 is fixed on the dual-chamber valve body 1 on one side of the high-pressure valve chamber 2, and a sealing ring 10 is arranged between the valve rod 9 and the first valve cover 7 to enhance the sealing property between the valve rod 9 and the first valve cover 7 and prevent the high-pressure medium from leaking; similarly, the double-cavity valve body 1 on one side of the low-pressure valve cavity 3 is also provided with a second valve cover 8, and the second valve cover 8 is fixed on the double-cavity valve body 1, so that the internal structural part of the low-pressure valve cavity 3 can be conveniently assembled in a mode of disassembling and assembling the second valve cover 8.

Referring to fig. 2, the linkage spool assembly includes a ball spool 13, an eccentric spool 20, and a throttle spool 16. The ball valve core 13 is fixed on the valve rod 9 in the high-pressure valve chamber 2, please refer to fig. 1, 2 and 4, and a flow guide channel for communicating the inflow port 4 at one side of the high-pressure valve chamber 2 with the cut-off hole in the valve seat 6 is arranged on the ball valve core 13. In an embodiment of the present invention, the ball valve core 13 is a stainless steel ball disposed in the high pressure valve cavity 2, and a through hole is disposed at one side of the stainless steel ball and is communicated with a flow guiding channel in the ball valve core 13.

Referring to fig. 4, the valve rod 9 is disposed through the ball valve element 13, the flow guide channel is disposed between the valve rod 9 and an inner side wall of the ball valve element 13, the flow guide channel is communicated with a throttle hole 17, and the throttle hole 17 is disposed between the valve seat 6 and the valve rod 9. Fig. 4 shows a schematic structural diagram of a ball valve core of the high pressure ball valve according to the present invention, wherein a rotation arrow indicates a rotation direction of the valve rod 9, and a straight arrow indicates a flow direction of a medium. In the preferred embodiment of the present invention, the flow guide channel is an n-type flow guide channel 15, the side surface of the flow guide channel is communicated with a through hole on the ball valve core 13, and the ball valve core 13 provided with a through hole is a through fixing ball 14 rotatably arranged in the high-pressure valve cavity 2. When the through hole of the ball valve core 13 is communicated with the inflow port 4 during the operation of the valve rod 9, the high-pressure medium flowing in from the inflow port 4 can enter the n-type diversion channel 15 along the through hole and flow to the throttle hole 17. The size of the through hole staggered with the inner wall of the double-cavity valve body 1 is changed by rotating the ball valve core 13 so as to adjust the medium flow entering the n-type flow guide channel 15.

In order to further ensure the sealing effect of the ball valve core 13, an inner bushing 12 is arranged on the inner side wall of the double-cavity valve body 1 in the high-pressure valve cavity 2, the inner bushing 12 abuts against the outer side wall of the ball valve core 13, so that a high-pressure medium input from the inflow port 4 is prevented from flowing into the orifice 17 along a gap between the ball valve core 13 and the inner side wall of the double-cavity valve body 1 in the high-pressure valve cavity 2, and similarly, the high-pressure medium input from the inflow port 4 can be prevented from flowing out from the valve cover 7 along a gap between the ball valve core 13 and the inner side wall of the double-cavity valve body 1 in the high-pressure valve cavity 2.

The eccentric valve core 20 is fixed on the valve rod 9 in the low-pressure valve cavity 3 and is used for plugging the outflow port 5 on one side of the low-pressure valve cavity 3 when rotating along with the valve rod 9. In one embodiment of the present invention, the eccentric valve core 20 is a C-shaped structure, and a sealing ring 21 for abutting against the eccentric valve core 20 is disposed on an end surface of the outlet 5 on one side of the low-pressure valve chamber 3. When the eccentric spool 20 rotates to the outlet 5 side with the stem 9, the outlet 5 is blocked to prevent the medium from being discharged from the outlet 5.

The eccentric valve core 20 is fixed at one end of the valve rod 9, the inner side wall of the second valve cover 8 is further provided with a valve shaft 22 connected with the eccentric valve core 20, the eccentric valve core 20 is installed between the valve rod 9 and the valve shaft 22, and the valve rod 9 and the valve shaft 22 are arranged on the same axis. During operation, the driving member drives the valve rod 9 to rotate, so as to drive the eccentric valve core 20 and the valve shaft 22 to rotate, thereby increasing the stability of the rotation of the eccentric valve core 20.

It should be noted that please refer to fig. 5, which is a schematic structural diagram of the open state of the high pressure ball valve according to the present invention, wherein the arrow indicates the medium flowing direction, when the ball valve core 13 rotates to connect the through hole thereof with the inflow port 4, the eccentric valve core 20 also rotates to a position staggered from the end surface of the outflow port 5, so that the outflow port 5 communicates with the low pressure valve cavity 3 to discharge the medium flowing into the low pressure valve cavity 3, and the flow rate of the medium flowing in and out can be adjusted by adjusting the area of the through hole of the ball valve core 13 communicating with the inflow port 4 and the area of the eccentric valve core 20 staggered from the end surface of the outflow port 5.

The throttle valve core 16 is slidably arranged on the valve rod 9 between the valve seat 6 and the eccentric valve core 20 and is used for blocking a throttle hole 17 communicated with a flow guide channel of the ball valve core 13. The throttle valve core 16 is fixed on the throttle valve sleeve 18, a spring 19 abutting against the eccentric valve core 20 is arranged in the throttle valve sleeve 18, the spring 19 is used for applying elastic force to the throttle valve sleeve 18 to move towards the valve seat 6 along the valve rod 9, and the throttle valve core 16 abuts against the valve seat 6.

Only when the pressure of the high-pressure medium guided to the throttling hole 17 on the throttling valve core 16 is larger than the elastic force of the spring 19, the throttling valve core 16 can be pushed to be separated from the valve seat 6, so that the high-pressure medium flows into the low-pressure valve cavity 3. Meanwhile, the throttle valve core 16 is also used for limiting the pressure of the high-pressure medium flowing into the flow inlet 4 on the throttle valve core 16, and when the pressure of the medium on the throttle valve core 16 is smaller than the set elastic force of the spring 19 on the throttle valve core 16, the high-pressure ball valve is blocked, so that the situation that the medium in the high-pressure ball valve flows backwards due to insufficient pressure is avoided, and the medium in the flow outlet 5 is prevented from flowing backwards.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The high-pressure ball valve is characterized by comprising a double-cavity valve body (1) and a linkage valve core assembly, wherein the linkage valve core assembly is installed in the double-cavity valve body (1) through a valve rod (9), and one end of the valve rod (9) is connected with a driving piece outside the double-cavity valve body (1); the double-cavity valve body (1) comprises a high-pressure valve cavity (2) and a low-pressure valve cavity (3) which are communicated with each other, and a valve seat (6) provided with a throttling hole (17) is further installed between the high-pressure valve cavity (2) and the low-pressure valve cavity (3);

the linkage valve core assembly comprises:

the ball valve core (13) is fixed on the valve rod (9) in the high-pressure valve cavity (2), and a flow guide channel for communicating an inflow port (4) on one side of the high-pressure valve cavity (2) with a cut-off hole in the valve seat (6) is arranged on the ball valve core (13);

the eccentric valve core (20) is fixed on the valve rod (9) in the low-pressure valve cavity (3) and is used for plugging the outflow port (5) on one side of the low-pressure valve cavity (3) when rotating along with the valve rod (9); and

and the throttling valve core (16) is arranged on the valve rod (9) between the valve seat (6) and the eccentric valve core (20) in a sliding manner and is used for plugging a throttling hole (17) communicated with a flow guide channel of the ball valve core (13).

2. The high-pressure ball valve according to claim 1, wherein the valve rod (9) is arranged along the axial direction of the dual-cavity valve body (1), a first valve cover (7) for the valve rod (9) to penetrate out to connect with a driving member is further arranged on the dual-cavity valve body (1), the first valve cover (7) is fixed on the dual-cavity valve body (1) on one side of the high-pressure valve cavity (2), and a sealing ring (10) is arranged between the valve rod (9) and the first valve cover (7).

3. The high-pressure ball valve according to claim 2, wherein a second valve cover (8) is further provided on the dual-chamber valve body (1) on one side of the low-pressure valve chamber (3), the second valve cover (8) is fixed on the dual-chamber valve body (1), and a valve shaft (22) connected with the eccentric valve core (20) is further provided on an inner side wall of the second valve cover (8).

4. A high-pressure ball valve according to claim 3, characterized in that the eccentric spool (20) is mounted between the valve stem (9) and the valve shaft (22), the valve stem (9) and the valve shaft (22) being arranged on the same axis.

5. The high-pressure ball valve according to claim 1, wherein the ball valve core (13) is a sphere disposed in the high-pressure valve chamber (2), an inner bushing (12) abutting against the outer sidewall of the sphere is disposed on the inner sidewall of the high-pressure valve chamber (2), and a through hole is disposed on one side of the sphere and communicates with the flow guide channel in the ball valve core (13).

6. The high-pressure ball valve according to claim 5, wherein the stem (9) is disposed through the ball insert (13), and the flow guide passage is disposed between the stem (9) and an inner sidewall of the ball insert (13).

7. A high-pressure ball valve according to claim 6, characterized in that said orifice (17) is arranged between said valve seat (6) and said valve stem (9) and communicates with said flow-guiding passage.

8. The high-pressure ball valve according to claim 7, wherein the ball valve core (13) is a through fixing ball (14), the flow guide channel is an n-type flow guide channel (15), a through hole in the through fixing ball (14) is communicated with one side of the n-type flow guide channel (15), and the n-type flow guide channel (15) is communicated with the throttling hole (17).

9. A high-pressure ball valve according to claim 1, characterized in that said throttling valve element (16) is fixed to a throttling valve housing (18), a spring (19) is arranged in the throttling valve housing (18) and abuts against said eccentric valve element (20), the spring (19) is used for applying an elastic force to said throttling valve housing (18) to move along said valve rod (9) towards said valve seat (6), and said throttling valve element (16) abuts against said valve seat (6).

10. The high-pressure ball valve according to claim 1, wherein the eccentric valve core (20) is of a C-shaped structure, and a sealing ring (21) for abutting against the eccentric valve core (20) is arranged on the end surface of the outflow port (5) on one side of the low-pressure valve cavity (3).