CN111322425A - High-sealed high-frequency ball valve - Google Patents

Abstract

The invention relates to a high-sealed high-frequency ball valve, which comprises a valve body formed by fixedly connecting a left valve body and a right valve body, wherein a ball core is arranged in a cavity of the valve body, a valve rod is fixedly connected with the ball core in the circumferential direction, valve seats are respectively arranged in the cavities of the left valve body and the right valve body, spring seats are respectively sleeved on the opposite ends of the two valve seats, a force storage spring is arranged between the spring seat and the valve seat, a first sealing ring is arranged between the excircle of the spring seat and the valve body, a second sealing ring is arranged between the inner circle of the spring seat and the valve seat, a third sealing ring is arranged between the excircle of the valve seat and the valve body, an upper shaft handle and a lower shaft handle of the ball core are respectively inserted into shaft holes of an upper positioning plate and a lower positioning plate which are arranged, the upper positioning plate and the lower positioning plate abut against and limit the left valve body and the right valve body, a dustproof sealing ring and a, and a packing is arranged between the small-diameter section at the upper end of the valve rod and the valve cover, and a packing gland is arranged at the upper end of the packing.

Description

A high-sealing high-frequency ball valve

technical field

The invention relates to the technical field of ball valves, in particular to a high-sealing high-frequency ball valve.

Background technique

High-frequency ball valve is a high-frequency switch and fast switch used for solid, liquid, and gas three-phase media with high sealing requirements, and its cut-off performance is good. A spring is installed between the valve seat and the valve body of the high frequency ball valve to ensure a good sealing contact between the valve seat and the valve core. At present, the cavity where the spring is installed between the valve seat and the valve body does not form a sealing structure. When the high-frequency ball valve is used to cut off the solid phase medium, because the solid phase medium has small particles and high hardness, it is extremely easy to enter the spring installation at the valve seat. in the cavity. The solid phase medium entering the spring installation cavity will cause the spring to be stuck, or even the spring will fail, which greatly shortens the service life of the spring, thereby affecting the sealing between the valve seat and the valve core, and reducing the switching performance of the ball valve. Moreover, at present, the valve stem and the valve body of the high-frequency ball valve are sealed by the installed graphite ring. The graphite ring can only block some tiny particles in the medium from entering the valve stem cavity, and some medium particles will still enter the valve stem through the installation gap. in the cavity. The particles entering the valve stem cavity will affect the smoothness of the valve stem rotation, resulting in an increase in the torque of the switch, and even the phenomenon of the valve stem locking, which seriously affects the normal operation of the high-frequency ball valve and loses the switching performance of the ball valve.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a high-sealing high-frequency ball valve in view of the deficiencies of the prior art, which improves the sealing performance at the valve seat, prolongs the service life of the accumulating spring, and ensures the gap between the valve seat and the ball core. It has good sealing performance, and improves the dustproof performance and sealing performance of the valve stem, which ensures the good switching performance of the valve stem.

The technical scheme of the present invention is: a high-sealing high-frequency ball valve, comprising a valve body formed by fixed connection of a left valve body and a right valve body, a ball core is installed in the cavity of the valve body, a valve stem is connected to the circumference of the ball core Axially fixed connection, the valve stem extends from the right valve body, the left valve body and the right valve body cavity are respectively provided with valve seats, the ball core is located between the left valve seat and the right valve seat, the two valve seats are The opposite end is in contact with the ball core, and the opposite ends are respectively provided with a spring seat, a force-storing spring is arranged between the spring seat and the valve seat to form a tight fit between the valve seat and the ball core, and a first seal is provided between the outer circle of the spring seat and the valve body A second sealing ring is arranged between the inner circle of the ring, the spring seat and the valve seat, and a third sealing ring is arranged between the outer circle of the valve seat and the valve body. The upper and lower ends of the ball core are symmetrically provided with shaft handles. The lower shaft handle is respectively inserted into the shaft holes of the upper positioning plate and the lower positioning plate to form a clearance fit. The upper positioning plate and the lower positioning plate abut against the left valve body and the right valve body to limit the position. The valve stem is a stepped shaft, and the valve The lower end of the rod is fixedly connected with the upper shaft handle of the ball core in the circumferential direction, the large diameter section of the valve rod and the right valve body are sequentially provided with a dustproof sealing ring and a wear-resistant sleeve from bottom to top, and a valve cover is fixedly connected to the right valve body. The upper end of the valve body is pressed against the wear-resistant sleeve, a fourth sealing ring is arranged between the valve cover and the right valve body, a packing is arranged between the small diameter section at the upper end of the valve stem and the valve cover, and a packing gland is arranged at the upper end of the packing , a packing pressure plate is pressed on the upper end of the packing pressure cover, the packing pressure plate is sleeved on the screw rod provided on the upper end of the valve cover, and is locked by a nut, and a compression spring is arranged between the nut and the packing pressure plate.

The valve seat is provided with an axially extending small diameter section, the spring seat is sleeved on the small diameter section, the compression spring abuts between the spring seat and the large diameter section of the valve seat, and the inner circle of the spring seat and the valve seat are separated. A second sealing ring is arranged between the small diameter sections, and a third sealing ring is arranged between the outer circle of the large diameter section of the valve seat and the valve body.

An annular groove is respectively set on the wall of the flow passage of the left valve body and the right valve body for the medium to circulate, and each spring seat is respectively abutted in the annular groove of the corresponding side valve body to limit its position.

The valve cover is a stepped shaft, and the small diameter shaft section of the valve cover presses the upper end of the wear-resistant sleeve to limit the position. A fourth sealing ring is arranged between the middle diameter shaft section of the valve cover and the right valve body. The diameter shaft section is fixedly connected with the right valve body through bolts.

The valve cover is provided with a stepped hole for the valve stem to pass through, packing is arranged between the large-diameter hole section at the upper end of the stepped hole and the small-diameter section at the upper end of the valve stem, and the large-diameter hole section at the lower end of the stepped hole is used to limit the valve stem. .

The small-diameter hole section of the stepped hole of the valve cover is located between the upper and lower large-diameter hole sections, and a fifth sealing ring is arranged between the small-diameter hole section of the stepped hole and the small-diameter section of the valve stem.

The upper and lower ends of the cavity walls of the left valve body and the right valve body are respectively provided with bosses, the left side of the right valve body boss is provided with a right circular arc positioning groove, and the right side of the left valve body boss is provided with a left circular arc Positioning groove, the upper positioning plate and the lower positioning plate are pressed against the arc positioning grooves of the left valve body and the right valve body to form a limit.

The right end face of the left valve body is provided with a positioning flange extending to the right for inserting into the cavity of the right valve body.

The right end surface of the left valve body is provided with a sealing flange, the left end surface of the right valve body is provided with a sealing groove matched with the sealing flange, and a sealing gasket is installed in the sealing groove.

The right end surface of the left valve body is provided with a sealing groove, a sealing gasket is installed in the sealing groove, and a sealing flange matched with the sealing groove is provided on the left end surface of the right valve body.

The above technical solution is adopted: it includes a valve body formed by the fixed connection of the left valve body and the right valve body, a ball core is installed in the cavity of the valve body, and a valve stem is fixedly connected with the ball core in the circumferential direction, and the valve stem is connected from the right valve body in the circumferential direction. The outer body extends, the left valve body and the right valve body cavity are respectively provided with valve seats, the ball core is located between the left valve seat and the right valve seat, the opposite ends of the two valve seats are in contact with the ball core, and the opposite ends are respectively set Spring seat, a force-storing spring is arranged between the spring seat and the valve seat to form a tight fit between the valve seat and the ball core, a first sealing ring is arranged between the outer circle of the spring seat and the valve body, and the inner circle of the spring seat and the valve seat are arranged A second sealing ring is arranged, a third sealing ring is arranged between the outer circle of the valve seat and the valve body, the upper and lower ends of the ball core are symmetrically provided with shaft shanks, and the upper and lower shaft shanks are respectively inserted into the upper positioning plate and the lower shaft. A clearance fit is formed in the shaft hole of the positioning plate, the upper positioning plate and the lower positioning plate abut against the left valve body and the right valve body to limit the position. Circumferentially fixed connection, between the large diameter section of the valve stem and the right valve body, a dustproof sealing ring and a wear-resistant sleeve are arranged in sequence from bottom to top, and a valve cover is fixedly connected to the upper end of the right valve body and presses the wear-resistant sleeve , A fourth sealing ring is arranged between the valve cover and the right valve body, and packing is filled between the small diameter section at the upper end of the valve stem and the valve cover. At the upper end, the packing pressure plate is sleeved on the screw rod provided on the upper end of the valve cover, and is locked by a nut, and a compression spring is arranged between the nut and the packing pressure plate. The high-frequency ball valve has good sealing performance and simple assembly. When assembling, put the spring seat with the first and second sealing rings installed on the valve seat, and install the spring seat, the force accumulating spring and the valve seat with the third sealing ring together in the right valve body cavity. The upper and lower positioning plates are then sleeved on the upper and lower shaft handles of the ball core, the ball core is assembled into the cavity of the right valve body, and the upper and lower positioning plates are pressed against the right valve body. Afterwards, install the left spring seat, the force accumulating spring and the left valve seat in the cavity of the left valve body in the same way, and make the left valve body abut against the left end of the right valve body and fix it by bolting. At this time, under the action of the accumulating spring, the left and right valve seats are tightly pressed against the ball core, forming a seal between the valve seat and the ball core. Moreover, through the action of the first, second and third sealing rings, there will be no circulating medium between the spring seat and the valve body, between the spring seat and the valve seat, and between the valve seat and the valve body, so that the spring seat and the valve body will not enter. No medium can enter the space between the valve seats where the accumulating spring is installed. In this way, the phenomenon that the medium enters the stuck force accumulating spring is avoided, the service life of the force accumulating spring is prolonged, and the axial movement of the valve seat is ensured, and the sealing performance between the valve seat and the ball core is good. High sealing performance between ball cores can be maintained all the time. The medium will no longer enter between the valve seat and the sealing surface of the ball core, which prevents the medium from scratching the sealing surface and prolongs the service life of the ball valve. Finally, insert the valve stem from the mounting hole on the upper end of the right valve body into the hole provided on the shaft handle on the ball core to form a circumferential fixed connection between the valve stem and the ball core, and cover the large diameter section of the valve stem in turn. Dust-proof sealing ring, wear-resistant sleeve. Cover the bonnet and fix the bonnet on the upper end of the right valve body with bolts. The lower end of the bonnet presses the wear-resistant sleeve, and after filling the packing between the bonnet and the small diameter section of the valve stem, cover the valve stem in turn. Upper packing gland and packing pressure plate. At the same time, the packing pressure plate is also sleeved on the screw rod provided on the upper end of the valve cover, and the compression spring is installed and locked by the nut. At this time, under the action of the compression spring, the packing pressure plate will tightly press the packing, which ensures the good sealing performance between the valve cover and the valve stem, and the dustproof sealing ring between the valve stem and the right valve body also has sealing performance. , thus forming a double seal at the valve stem. The double sealing structure increases the sealing performance at the valve stem, avoids the entry of the medium at the valve stem, ensures the smoothness of the valve stem rotation, and avoids the phenomenon of valve stem locking. The opening and closing of the ball valve is normal, and the switching performance of the ball valve is good. , the truncation function of the medium is good.

The valve seat is provided with an axially extending small diameter section, the spring seat is sleeved on the small diameter section, the compression spring abuts between the spring seat and the large diameter section of the valve seat, and the inner circle of the spring seat and the valve seat are separated. A second sealing ring is arranged between the small diameter sections, and a third sealing ring is arranged between the outer circle of the large diameter section of the valve seat and the valve body. The valve seat of the structure is simple to process, and also facilitates the installation of the spring and the spring seat.

An annular groove is respectively set on the wall of the flow passage of the left valve body and the right valve body for the medium to circulate, and each spring seat is respectively abutted in the annular groove of the corresponding side valve body to limit its position. The annular groove forms the limit of the valve body to the spring seat, and the processing industry of the annular groove is simple.

The valve cover is a stepped shaft, and the small diameter shaft section of the valve cover presses the upper end of the wear-resistant sleeve to limit the position. A fourth sealing ring is arranged between the middle diameter shaft section of the valve cover and the right valve body. The diameter shaft section is fixedly connected with the right valve body through bolts. The fourth sealing ring ensures the tightness between the valve cover and the right valve body, which not only prevents the leakage of the medium, but also prevents the entry of substances in the external environment. The connection of the valve cover to the right valve body is also simple.

The valve cover is provided with a stepped hole for the valve stem to pass through. Packing is arranged between the large-diameter hole section at the upper end of the stepped hole and the small-diameter section at the upper end of the valve stem, and the large-diameter hole section at the lower end of the stepped hole is used for axial limit. The large diameter section of the stem prevents the stem from flying out. The large-diameter hole section at the upper end of the stepped hole forms a packing cavity, which facilitates the filling of the packing. In addition, the large-diameter hole section at the lower end of the stepped hole can be inserted into the large-diameter section of the valve stem, which ensures the limit of the valve cover to the wear sleeve and the valve stem. The small-diameter hole section of the stepped hole of the valve cover is located between the upper and lower large-diameter hole sections, and a fifth sealing ring is arranged between the small-diameter hole section of the stepped hole and the small-diameter section of the valve stem. The fifth sealing ring can increase the sealing performance between the valve cover and the valve stem, and improve the sealing performance of the ball valve.

The upper and lower ends of the cavity walls of the left valve body and the right valve body are respectively provided with bosses, the left side of the right valve body boss is provided with a right circular arc positioning groove, and the right side of the left valve body boss is provided with a left circular arc Positioning groove, the upper positioning plate and the lower positioning plate are pressed against the arc positioning grooves of the left valve body and the right valve body to form a limit. The arc positioning grooves on the left and right valve body bosses have a good limit on the positioning plate, thereby ensuring the accurate positioning of the ball core in the valve body cavity. The right end face of the left valve body is provided with a positioning flange extending to the right for inserting into the cavity of the right valve body. The contact area of the body makes the positioning of the upper and lower positioning plates better.

The right end surface of the left valve body is provided with a sealing flange, the left end surface of the right valve body is provided with a sealing groove matched with the sealing flange, and a sealing gasket is installed in the sealing groove. Alternatively, a sealing groove is provided on the right end surface of the left valve body, a sealing gasket is installed in the sealing groove, and a sealing flange matched with the sealing groove is provided on the left end surface of the right valve body. The cooperation between the sealing flange and the sealing groove not only has a positioning function, but the sealing gasket between the sealing flange and the sealing groove ensures the sealing performance between the left valve body and the right valve body, and increases the sealing performance of the ball valve.

The high-sealing high-frequency ball valve has the advantages of simple assembly, stable and reliable use and long service life. Setting the first, second and third sealing rings prevents the entry of the circulating medium in the space where the accumulating spring is installed between the spring seat and the valve seat, ensures the normal operation of the accumulating spring, and maintains a good seal between the valve seat and the ball core , prolong the service life of the ball valve. In addition, the packing at the valve stem and the dust-proof sealing ring increase the sealing performance at the valve stem, which ensures the smoothness of the valve stem rotation, and the switching performance of the ball valve is good. The good sealing at the valve seat ensures the normal operation of the spring, the good sealing between the valve seat and the ball core, and the good sealing at the valve stem, which ensures the normal rotation of the valve stem. The high frequency ball valve has high sealing performance and good switching performance of the ball valve.

The present invention will be further described below with reference to the accompanying drawings and specific embodiments of the description.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the enlarged view of A of Fig. 1;

Fig. 3 is the enlarged view of B of Fig. 1;

Fig. 4 is the enlarged view of C of Fig. 1;

Fig. 5 is the structural representation of valve cover;

Figure 6 is a schematic structural diagram of the right valve body;

FIG. 7 is a schematic structural diagram of the left valve body.

Detailed ways

Referring to FIGS. 1 to 7 , a high-sealing high-frequency ball valve includes a valve body formed by a left valve body 4 and a right valve body 15 fixedly connected by bolts. A ball core 14 is installed in the cavity of the valve body, a valve rod 10 is fixedly connected with the ball core 14 in the circumferential direction, and the valve rod 10 extends outward from the right valve body 15 . The right end surface of the left valve body 4 is provided with a sealing flange, and the left end surface of the right valve body 15 is provided with a sealing groove matched with the sealing flange, and a sealing gasket 5 is installed in the sealing groove. Alternatively, the right end surface of the left valve body 4 is provided with a sealing groove, the sealing gasket 5 is installed in the sealing groove, and the left end surface of the right valve body 15 is provided with a sealing flange matching with the sealing groove. The cooperation between the sealing flange and the sealing groove not only has a positioning function, but the sealing gasket 5 between the sealing flange and the sealing groove ensures the sealing between the left valve body 4 and the right valve body 15, and increases the sealing performance of the ball valve. . In this embodiment, the left valve body 4 is provided with a sealing flange, and the right valve body 15 is provided with a sealing groove. The left valve body 4 and the right valve body 15 are respectively provided with valve seats 3 in the cavities, the ball core 14 is located between the left valve seat and the right valve seat, and the opposite ends of the two valve seats 3 are in contact with the ball core 14, on the contrary Spring seats 1 are respectively sleeved on the ends. The left valve body 4 and the right valve body 15 are respectively provided with an annular groove 25 on the wall of the flow passage for the medium to circulate, and each spring seat 1 abuts against the annular groove 25 of the corresponding side valve body to limit its position. The annular groove 25 forms the limit of the valve body to the spring seat 1 , and the processing industry of the annular groove 25 is simple, and can be processed by turning. The valve seat 3 is provided with an axially extending small diameter section, and the spring seat 1 is sleeved on the small diameter section. A force accumulating spring 2 is arranged between the spring seat 1 and the valve seat 3 to form a tight fit between the valve seat 3 and the ball core 14 , and the force accumulating spring 2 abuts between the large diameter section of the spring seat 1 and the valve seat 3 . A first sealing ring 22 is arranged between the outer circumference of the spring seat 1 and the valve body, and an annular groove for installing the first sealing ring 22 is arranged on the outer circumference of the spring seat 1 . A second sealing ring 23 is provided between the inner circle of the mounting spring seat 1 and the small diameter section of the valve seat 3 , and the inner circle of the mounting spring seat 1 is provided with a ring groove for mounting the second sealing ring 23 . A third sealing ring 24 is arranged between the outer circumference of the large diameter section of the valve seat 3 and the valve body, and a ring groove for installing the third sealing ring 24 is arranged on the outer circumference of the valve seat 3 . The valve seat 3 of this structure is simple to process, and the outer circle of the valve seat 3 can be machined by turning, which also facilitates the installation of the force accumulating spring 2 and the spring seat 1 . The upper and lower ends of the ball core 14 are symmetrically provided with shaft shanks 14-1, and the upper and lower shaft shanks 14-1 are respectively inserted into the shaft holes of the upper positioning plate 13 and the lower positioning plate 16 to form a clearance fit. 13. The lower positioning plate 16 abuts against the left valve body 4 and the right valve body 15 to limit the position. The upper and lower ends of the cavity walls of the left valve body 4 and the right valve body 15 are respectively provided with bosses, the left side of the boss of the right valve body 15 is provided with a right arc positioning groove 15-1, and the left valve body 4 is convex A left arc locating groove 4-1 is provided on the right side of the table, and the upper locating plate 13 and the lower locating plate 16 abut against the arc locating grooves of the left valve body 4 and the right valve body 15 to form a limit. The arc positioning grooves on the left and right valve body platforms have a good limit on the positioning plate, thereby ensuring the accurate positioning of the ball core 14 in the valve body cavity. The right end surface of the left valve body 4 is provided with a positioning flange 4 - 2 extending to the right for being inserted into the cavity of the right valve body 15 . The positioning flange 4-2 can increase the depth of the left arc positioning groove 4-1 in the cavity of the left valve body 4, increase the contact area between the upper and lower positioning plates and the left valve body 4, and make the positioning of the upper and lower positioning plates better. The valve stem 10 is a stepped shaft, and the small diameter section at the lower end of the valve stem 10 is circumferentially fixedly connected with the upper shaft handle of the ball core 14 . The circumferential fixed connection may be a square hole connection, or may be a cut-flat circumferential fixed connection provided through the small diameter section at the lower end of the valve stem 10 . Between the large diameter section of the valve stem 10 and the right valve body 15, a dust-proof sealing ring 6 and a wear-resistant sleeve 7 are sequentially arranged from bottom to top. The right valve body 15 is provided with a hole for the valve stem 10 to pass through. The hole is a stepped hole. The small diameter section at the lower end is matched with the large diameter section of the valve stem 10, and the large diameter section at the upper end is used to install the dustproof sealing ring. Sleeve 7, dust-proof sealing ring 6 abuts against the hole shoulder to form a limit. A valve cover 12 is fixedly connected to the upper end of the right valve body 15 and presses the wear-resistant sleeve 7, and the valve cover 12 is a stepped shaft. The small diameter shaft section of the valve cover 12 presses the upper end of the wear sleeve 7 to limit the position, a fourth sealing ring 17 is arranged between the middle diameter shaft section of the valve cover 12 and the right valve body 15, and the large diameter shaft of the valve cover 12 The segment is fixedly connected to the right valve body 15 by means of bolts. The fourth sealing ring 17 ensures the tightness between the valve cover 12 and the right valve body 15, which not only prevents the leakage of the medium, but also prevents the entry of substances in the external environment. The connection between the valve cover 12 and the right valve body 15 is also Simple. The valve cover 12 is provided with a stepped hole 12-1 for the valve stem 10 to pass through. The large diameter hole section at the lower end of the stepped hole 12-1 is used to axially limit the large diameter section of the valve stem 10 to prevent the valve stem from flying out. , the filler 8 is filled between the large-diameter hole section at the upper end of the stepped hole 12-1 and the small-diameter section at the upper end of the valve stem 10. The large-diameter hole section at the upper end of the stepped hole 12-1 forms a packing cavity, which facilitates the filling of the packing, and the large-diameter hole section at the lower end of the stepped hole 12-1 can be inserted into the large-diameter section of the valve stem 10, ensuring that the valve cover 12 Limit for wear sleeve 7. The small diameter hole section of the stepped hole 12 - 1 of the valve cover 12 is located between the upper and lower large diameter hole sections, and a fifth sealing ring 21 is provided between the small diameter hole section of the stepped hole 12 - 1 and the small diameter section of the valve stem 10 . The valve cover 12 is provided with a ring groove for installing the fifth sealing ring 21. The fifth sealing ring 21 can increase the sealing performance between the valve cover 12 and the valve stem 10 and improve the sealing performance of the ball valve. The upper end of the packing 8 is provided with a packing gland 9, a packing pressure plate 11 is pressed on the upper end of the packing gland 9, the packing pressure plate 11 is sleeved on the screw 20 provided on the upper end of the valve cover 12, and is locked by a nut 19, the nut 19 and the packing A compression spring 18 is provided between the pressing plates 11 .

The high-frequency ball valve has good sealing performance, simple assembly and long service life. When assembling, put the spring seat 1 with the first and second sealing rings installed on the valve seat 3, and install the spring seat 1, the accumulating spring 2 and the valve seat 3 with the third sealing ring 23 on the right side together. Inside the valve body 15 cavity. Then put the upper and lower positioning plates on the upper and lower shafts 14 - 1 of the ball core 14 , the ball core 14 is assembled into the cavity of the right valve body 15 , and the upper and lower positioning plates are pressed against the right valve body 15 . Afterwards, similarly install the left spring seat 1, the storage spring 2 and the left valve seat 3 in the cavity of the left valve body 4, and make the left valve body 4 abut the left end of the right valve body 15 and fix it by bolting. At this time, under the action of the accumulating spring 2, the left and right valve seats 3 are tightly pressed against the ball core 14, forming a seal between the valve seat 3 and the ball core 14. In addition, through the action of the first, second and third sealing rings, there will be no circulating medium between the spring seat 1 and the valve body, between the spring seat 1 and the valve seat 3, and between the valve seat 3 and the valve body. So that no medium will enter into the space between the spring seat 1 and the valve seat 3 where the force accumulating spring 2 is installed. In this way, the phenomenon that the medium enters the stuck force accumulating spring 2 is avoided, the normal operation of the force accumulating spring 2 is guaranteed under the condition of use, the axial movement of the valve seat, and the good sealing performance with the ball core are ensured. High sealing performance between the seat and the ball core can be maintained all the time. The medium will no longer enter between the sealing surface of the valve seat 3 and the ball core 14, which avoids the situation that the medium scratches the sealing surface and prolongs the service life of the ball valve. Finally, insert the valve stem 10 from the hole at the upper end of the right valve body 15 into the hole provided on the shaft shank 14-1 on the ball core 14. The hole on the shaft shank 14-1 can be a square hole to form the valve stem 10 and the ball core 14. The circumferential direction between them is fixedly connected, and the large diameter section of the valve stem 10 is covered with a dust-proof sealing ring 6 and a wear-resistant sleeve 7 in sequence. Cover the bonnet 12 and fix the bonnet 12 on the upper end of the right valve body 15 by bolts. The lower end of the bonnet 12 presses the wear-resistant sleeve 7, and the packing 8 is filled between the bonnet 12 and the small diameter section of the valve stem 10. Then, cover the valve stem 10 with the packing gland 9 and the packing pressure plate 11 in sequence. At the same time, the packing pressure plate 11 is also sleeved on the screw rod 10 provided on the upper end of the valve cover 12 , and the compression spring 18 is installed and locked by the nut 19 . At this time, under the action of the compression spring 18 , the packing pressing plate 11 will tightly press the packing 8 to ensure good sealing performance between the valve cover 12 and the valve stem 10 . Moreover, the dustproof sealing ring 6 between the valve stem 10 and the right valve body 15 also has sealing properties, and the fifth sealing ring 21 forms multiple seals at the valve stem 10 . The multiple sealing structure greatly increases the sealing performance of the valve stem 10, prevents the medium from entering the valve stem 10, ensures the smooth rotation of the valve stem 10, avoids the phenomenon that the valve stem 10 is locked, and ensures the opening of the ball valve. closed normally. The high-frequency ball valve has high sealing performance, good on-off performance of the ball valve, and good cut-off function for the medium.

Claims (10)

1. A high-sealing high-frequency ball valve, comprising a valve body formed by fixed connection of a left valve body (4) and a right valve body (15), a ball core (14) installed in the cavity of the valve body, a valve stem (10) is fixedly connected with the ball core (14) in the circumferential direction, the valve stem (10) extends from the right valve body (15), and is characterized in that: the left valve body (4) and the right valve body (15) A valve seat (3) is respectively arranged in the cavity, the ball core (14) is located between the left valve seat and the right valve seat, the opposite ends of the two valve seats (3) are in contact with the ball core (14), and the opposite ends are respectively A spring seat (1) is provided, and an accumulating spring (2) is arranged between the spring seat (1) and the valve seat (3), so that the valve seat (3) and the ball core (14) form a close fit, and the spring seat (1) A first sealing ring (22) is arranged between the outer circle and the valve body, a second sealing ring (23) is arranged between the inner circle of the spring seat (1) and the valve seat (3), and the outer circle of the valve seat (3) is connected to the valve seat (3). A third sealing ring (24) is arranged between the valve bodies, the upper and lower ends of the ball core (14) are symmetrically provided with shaft shanks (14-1), and the upper and lower shaft shanks (14-1) are inserted into the upper and lower ends respectively. A clearance fit is formed in the shaft holes of the positioning plate (13) and the lower positioning plate (16), and the upper positioning plate (13) and the lower positioning plate (16) abut against the left valve body (4) and the right valve body (15) to limit the position , the valve stem (10) is a stepped shaft, the lower end of the valve stem (10) is circumferentially fixedly connected with the upper shaft handle of the ball core (14), and the large diameter section of the valve stem (10) is connected to the right valve body (15). A dustproof sealing ring (6) and a wear-resistant sleeve (7) are arranged in order from bottom to top between ), a valve cover (12) is fixedly connected to the upper end of the right valve body (15) and presses the wear-resistant sleeve (7), A fourth sealing ring (17) is arranged between the valve cover (12) and the right valve body (15), and a packing (8) is arranged between the small diameter section at the upper end of the valve stem (10) and the valve cover (12), The upper end of the packing (8) is provided with a packing gland (9), a packing pressure plate (11) is pressed on the upper end of the packing gland (9), and the packing pressure plate (11) is sleeved on a screw (20) provided on the upper end of the valve cover (12). ), it is locked by a nut (19), and a compression spring (18) is arranged between the nut (19) and the packing pressure plate (11). 2 . The high-sealing high-frequency ball valve according to claim 1 , wherein the valve seat ( 3 ) is provided with an axially extending small diameter section, and the spring seat ( 1 ) is sleeved on the small diameter section, 2 . The accumulating spring (2) abuts between the spring seat (1) and the large diameter section of the valve seat (3), and a second seal is provided between the inner circle of the spring seat (1) and the small diameter section of the valve seat (3). A third sealing ring (24) is arranged between the outer circle of the large diameter section of the valve seat (3) and the valve body. 3. The high-sealing high-frequency ball valve according to claim 1, characterized in that: an annular groove is respectively provided on the wall of the passage for the medium to flow through the left valve body (4) and the right valve body (15), Each spring seat (1) is respectively abutted in the annular groove of the corresponding side valve body to limit its position. The high-sealing high-frequency ball valve according to claim 1, characterized in that: the valve cover (12) is a stepped shaft, and the small diameter shaft section of the valve cover (12) presses the upper end limit of the wear-resistant sleeve (7) A fourth sealing ring (17) is arranged between the middle diameter shaft section of the valve cover (12) and the right valve body (15), and the large diameter shaft section of the valve cover (12) is connected to the right valve body through bolts (15) Fixed connection. 5. The high-sealing high-frequency ball valve according to claim 1, characterized in that: the valve cover (12) is provided with a stepped hole (12-1) for the valve stem (10) to pass through, and the stepped hole ( 12-1) Packing (8) is filled between the large-diameter hole section at the upper end and the small-diameter section at the upper end of the valve stem (10), and the large-diameter hole section at the lower end of the stepped hole (12-1) is used to limit the valve stem (10). ). 6. The high-frequency ball valve with high sealing according to claim 5, characterized in that: the small-diameter hole section of the stepped hole (12-1) of the valve cover (12) is located between the upper and lower large-diameter hole sections, and the stepped hole section is located between the upper and lower large-diameter hole sections. A fifth sealing ring (21) is arranged between the small diameter hole section of the hole (12-1) and the small diameter section of the valve stem (10). 7. The high-sealing high-frequency ball valve according to claim 1, wherein the upper and lower ends of the cavity walls of the left valve body (4) and the right valve body (15) are respectively provided with bosses, and the right valve body (15) is provided with bosses respectively. A right circular arc positioning groove (15-1) is set on the left side of the boss of the body (15), a left circular arc positioning groove (4-1) is set on the right side of the boss of the left valve body (4), and the upper positioning plate ( 13) The lower positioning plate (16) is pressed against the arc positioning grooves of the left valve body (4) and the right valve body (15) to form a limit. 8. The high-sealing high-frequency ball valve according to claim 7, characterized in that: the right end surface of the left valve body (4) is provided with a positioning flange ( 4-2). 9 . The high-sealing high-frequency ball valve according to claim 1 , wherein a sealing flange is provided on the right end surface of the left valve body ( 4 ), and a sealing flange is provided on the left end surface of the right valve body ( 15 ). 10 . The flange fits the sealing groove, and the sealing gasket (5) is installed in the sealing groove. 10. The high-sealing high-frequency ball valve according to claim 1, characterized in that: a sealing groove is provided on the right end surface of the left valve body (4), and a sealing gasket (5) is installed in the sealing groove, and the The left end face of the right valve body (15) is provided with a sealing flange matched with the sealing groove.

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