TW386151B - Ball cock - Google Patents

Abstract

A ball cock, with a cock shaft for a cock member, which is rotatably and slightly tiltably guided in a cock shaft bore of a housihg and which has a sealing surface which is formed on a collar on the side opposed to the cock member, with a sealihg ring cooperating with the sealing surface and being supported on a graduation of the cock shaft bore, and with a spring pressing the sealing surface against the sealing ring, wherein the sealing ring has essentially a line contact with the sealing surface.

Description

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention () Brief description of the drawing number 2 Details 3 Details 10 Housing 10b Housing 12 Spherical plug 14 Ball valve shaft 16 Journal 18 Notch 20 Opening 22 Open Hole 24 Seal 26 Shoulder 28 Pressure ring 30 Opening portion 32 Seal ring 32a Seal fitting 34 Shoulder 36 Seal surface 38 Spring assembly 40 Nut 42 Threaded portion 44 Nut 46 Manual lever 15 T! | Order ·! ! |! Line I (Please read the precautions on the back before filling out this page) This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)

V. Description of the invention (I) Printed by the Shellfish Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economics The invention relates to a ball valve according to the preamble of the first scope of the patent application scope. It is very important to open the seal of the shaft relative to the joint housing, because leakage may occur here, especially in the rotation operation of the ball valve shaft by a single-sided lever. For this reason, a tilting moment is applied to the ball valve shaft, thereby allowing the seals to be squeezed together on the one hand and allowing a gap to be formed on the other. In German utility model patent DE-U-78 15 061, a ball valve is disclosed. The ball valve shaft collided by pressure is used to be firmly fixed in the joint housing, and has two diameters spaced axially from each other. To the collar, and the collar has a spherical sealing surface, and the two collars are supported by the two-stage ball valve shaft opening through the sealing ring with a spherical sealing surface. The ball valve shaft is squeezed and pulled on its sealing seat, which is caused by the internal pressure of the housing and the pre-tension of the coil spring. The coil spring on one side is supported on the joint housing. On the outside, the coil spring on the other side is supported by a reverse bearing connected to the ball valve shaft. This design has the disadvantages that the internal force of the ball valve and the loss of sealing performance are not conducive to the pretension of the spring. The ball valve shaft can only be tilted with a considerable gap formed between the collar and the sealing surface, because the spherical seal seat has a radius midpoint, which is quite obviously in an axial configuration. German Patent No. DE 21 40 975 A ball valve shaft seal for a ball valve is disclosed. The ball valve shaft includes an annular collar and a flat p-ring surface, which is used to support the configuration of the two seals. % The paper size of the binding booklet applies to the Chinese National Standard (CNS) A4 specification < 210 X 297 mm. B7 5. In the description of the invention (>), the two wedge-shaped sealing rings are joined to each other. Furthermore, German Patent No. DE 26 58 256 discloses a main shaft for a joint, in which a sealing ring with a spherical seal seat is pressed against a ball of a radial collar of the main shaft by a coil spring. "Seal-like sealing surface" This sealing surface is arranged on the inner lateral side of the collar, so that the coil spring system is supported on the inner stepped portion of the main shaft opening and is in contact with the medium flowing therethrough. This collar is supported by a flat annular surface on the outer side of the reverse bearing connected to the housing, so that the main shaft cannot effectively have tilting movement. Finally, a ball valve is disclosed in German Patent No. DE 41 04 003, in which a relatively horizontal and spherical sealing surface is formed on a single collar on the ball valve shaft, and is located on the opposite lateral side The same shape of the seal ring fits, where the spring acts on a pressure ring, and the pressure ring is pressed against the facing seal ring to squeeze the seal ring against the collar. " With this ball valve, the seal ring and the ball valve shaft are tightly pressed together without gap. This compression spring ensures that manufacturing tolerances, changes in extension, and wear are compensated, so under normal circumstances, it must continuously adjust the seal. With the spherical seal and the surface of the seat on both sides of the same collar, it can produce a sealed bearing without clearance, and it is generated due to the medium between the ball valve shaft and the ball valve shaft opening. Deposition can also be avoided. The conventional design requires a relatively high torque in operation, and this is also the case for the installation of the ball valve shaft described previously. SUMMARY OF THE INVENTION The object of the present invention is to provide a ball valve, which has a ball valve rail, 4 0 fi a— nn it 1_ —Bl- ϋ 1 Η- I «1 a—-w (it. Read the precautions on the back before (Fill in this page) -5J. Printed on paper sizes of 18 national standards (CNS) A4 specifications (210 X 297 mm >

5. Description of the invention (>) It is installed in it, which can prevent the moment of the ball valve shaft from acting on the seal ring, and can make the ball valve shaft simple and easy to move. This objective can be achieved by the features described in item 1 of the scope of patent application. With a ball valve according to the invention *, it provides linear contact between the sealing ring and the sealing surface. In view of this, the sealing surface is preferably concave in cross section. According to another type of the present invention, the sealing ring can also form a spherical shape in the bearing portion q. According to another type of the sealing ring, The radius of curvature of the ring is smaller than the radius of curvature of the sealing surface. The type of ball valve according to the present invention has many advantages. With the linear connection d, the tightness can be obtained on the ball valve shaft collar, and there is a lateral force on the ball valve shaft, and therefore the ball valve shaft has a corresponding inclination angle and remains intact, so The space between the ball valve shaft and the opening of the ball valve shaft will not be penetrated by any products. When the ball valve shaft is tilted, no significant moment is applied to the seal ring. The contact line between the seal ring and the collar can move slightly as the ball valve shaft is tilted, but for this reason, the sealing performance is not affected as such. A further advantage of the method according to the present invention is that the torque required to tilt the ball valve shaft is relatively small. According to the design of the present invention, the last advantage is that it can also be made of ceramics or Although the sealing ring made of metal material requires only a relatively small torque in operation, it can still achieve a solid seal. According to another version of the present invention, it is connected with the ball valve shaft opening. Another sleeve-type sealing ring is matched with each other. The sealing ring is provided by a spring and a pressure ring. The paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm > η— ϋ 1 n II —L l · · l_i 1 I · I ti ./i \ (if · Please read the notes on the back before filling this page) Order · Printed by the Industrial and Commercial Consumers Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (4) To strike, the spring is preferably a coil spring. In order to maintain the torque required for the operation of the ball valve shaft to a very low level, the present invention relates the coil spring to the pressure ring. A linear contact is provided, wherein A type of pressure ring, where the connection with the coil spring is a convex curve. Furthermore, in this way, uniform pressure of the pressure ring can be achieved on the associated sealing ring, and the ball valve shaft The collar has the uniform fit of the seal ring, and can also make the ball valve shaft tilt. Instead of the spring between the stopper and the seal on the ball valve shaft, the seal itself can also have Elasticity, for example, in the form of a flexible sealing ring disposed on the outer periphery, wherein the outer periphery includes a notch in which a spring is mounted, and preferably a V-shaped spring, and by this Way, the seal is extended outward along the axial direction, and thus a squeezing force is generated on the collar of the ball valve shaft. In this way, the coil that will be used can be eliminated. A ring Or a sleeve-shaped element may be used instead, which is introduced into an expansion part of a ball valve shaft opening, and it may cooperate with, for example, a lower edge surface of a nut, wherein the nut Tie screw on the ball On the shaft. With the aid of this nut, the pressing force on the seal can be adjusted. In this way, it can apply a predetermined pretension. • The flange on the cylinder element can be adjusted. Make sure that the pre-tension or preset system does not exceed a certain amount, where it is abutted against the outer side of the housing. In this way, it can avoid the deformation that is not allowed by the seal on the ball valve shaft The use of a coil spring can provide a positive effect on the state of space. However, * the coil spring is prone to corrosion in an aggressive environment. 6 This paper size applies the Chinese national standard < CNS > A4 specification (210 * 297 public "> 1 ^, ^ 1 ϋ II ϋ 1 mf il · f-I n I» ^ «ff \ (No need to read the precautions on the reverse side before filling out this page) Printed by Boiler Consumer Cooperative

Printed by the Industrial and Commercial Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of Invention (s). The corrosion-resistant coil spring is then quite complicated. The spring contained in the seal ring may be made of, for example, PTFE, and a spring made of a spring steel material, for example, steel 1.4310, Inconel X750 or the like. This ball valve can also be effectively used in vacuum areas and can be used under temperature-varying loads. Worn or altered pretension can be remedied, for example, by tightening the nut. For an additional seal, according to one version of the present invention, the seal ring system located in a corner region diagonally opposite the seal surface may include a notch to receive a O-ring. In the case of aggressive media flowing to the ball valve, on the one hand, by properly selecting the material of the ball valve member, on the other hand, by appropriately selecting the material of the ball valve shaft, to ensure that corrosion does not occur. When required, this will result in additional costs for these parts. Therefore, according to a version of the present invention, an annular seal fitting is provided between the housing and the ball valve member formed like a ball. For this reason, it uses a sealing ring, which is installed in an annular recess in the housing, and it is obviously connected with the surface of the sphere under the action of spring tension. For this reason, for example, the ball can be pressed against the sealing fitting with the assistance of being installed on the opposite lateral sides of the ball valve shaft, for example, by being arranged between a bearing journal and the recess of the ball Reached by the spring. This spring may also be constituted by a coil spring. This sealing fitting can be composed of two springs, of which the outer spring is relatively hard, such as graphite, PTFE, or similar materials, while the inner spring can be made of, for example, plastic with external springs. This type of seal fitting should be used in the notch to store the seal fitting ---------; '1. Install -------- Order.-Γ \-< tt .. (Please read the notes on the back before filling this page) This paper size applies to Chinese National Standards < CNS) A4 size (210 * 297 mm

5. Description of the invention When an additional sealing ring is arranged at (k), it is quite advantageous, which can prevent the medium from entering the opening of the ball valve shaft through the notch. This additional sealing ring may be, for example, a 0-ring made of graphite, PTFE, or the like, but may be a 0-ring made of metal. The advantage of a bilateral installation is that it allows the electrostatic charge of the ball plug to be discharged through the spring and bearing journal. In this embodiment type, the force will not act on the sealing ring of the ball valve shaft, otherwise it is usually in close contact with the installed spherical plug under this condition. The seal fitting between the housing and the sphere also exhibits the function of a bearing ring. In another form of the present invention, a deformable third sealing ring having a V-shaped cross section is arranged between the housing and the ball valve member forming a ball, and a spring is installed at the notch. The spring is used for The branches of the seal ring are squeezed apart, so that a branch system is pressed against the surface facing the sphere. Preferably, the spring also has the same V-shaped cross section and is preferably made of a suitable spring-acting material, especially a metal. The sealing ring may be made of a plastic material according to the present invention, and the plastic material may be surrounded by an elastic material, for example, covered. The arrangement of the third sealing ring in accordance with the present invention has the advantage that it is installed in the recess of the housing, and the recess is located at the radial edge of the opening of the ball valve shaft. The advantage is that no product will enter the space of the ball valve shaft. The ball valve shaft is therefore protected from corrosive media. Therefore, the ball valve shaft does not need to be made of a relatively expensive non-corrosive material. Obviously, this will also cause the size reduction of the ball valve shaft, which will have a positive impact on the structure size of the ball valve. 8 This paper size applies to the national standard of China (CNS > A4 (210 * 297) Gonglu > (Jing first read the notes on the back before filling out this page) Printed by the MJ Consumer Cooperative of the Jiji Village Intellectual Property Bureau

5. Description of the invention) This will cause a reduction in the space requirement of the ball valve shaft by 60% or more. '11! -'- install i I / | \ (». Read" Precautions on the back before filling this page ") Ball valve components, such as ball plugs, are covered with PTFE or FEP, making the ball valve shaft These materials need to be covered. In this way, however, problems arise at the joint between the ball valve shaft and the ball valve member. The cladding material is usually not in a position that can withstand relatively high surface pressures. Therefore, corrosion occurs in this area. This problem can be avoided by means according to the invention *. Brief Description of the Drawings Figure 1 shows a cross section of a ball valve having a ball valve shaft installed in accordance with the present invention. FIG. 2 shows the details enlarged from FIG. 1. FIG. 3 shows another detail from FIG. 1. FIG. 4 shows another embodiment of a ball valve according to the present invention. Fig. 5 shows a third embodiment of a ball valve according to the present invention. "Circle 6 shows a fourth embodiment of a ball valve according to the present invention. A detailed description of the invention is printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Figure 1 shows a ball valve housing 10 and a ball plug 12 which are rotatable with the assistance of a ball valve shaft 14 The neck 16 is engaged into a suitable recess 18. The casing 10 includes an opening 20 having a first opening portion 22, and a sleeve-shaped sealing member 24 is disposed therein. By applying the opening 22, the size of this paper applies the Chinese National Standard (CNS) A4 specification (210 * 297mm *)., 9.-, A7 B7 V. Description of the invention (f) The reduction in diameter, it is formed There is a shoulder 26 which is inclined downward with respect to the opening 20 and can support the sealing member 24 thereon. The seal 24 also has an upper edge side, and the side has an inclined surface, which can be used to fit the inclined surface of the pressure ring 28, and the pressure ring 28 is fitted in the opening portion 22 in a sleeve type. In the lower opening portion 30, a sealing ring 32 is installed, the details of which will be described later. The seal is matched with the radial shoulder 34 of the ball valve shaft 14, wherein the ball valve shaft includes a concave curved spherical sealing surface 36. A spring assembly 38 is arranged above the pressure ring 28. It is composed of two coil springs, and the setting can be adjusted under the pressure of a nut 40, and the nut 40 is screwed to the threaded portion 42 of the ball valve shaft 14. A manual tappet 46 is shown between the nut 40 and the other nut 44 of the ball valve shaft 14. FIG. 2 shows the detail 2 according to FIG. 1 (the circled part). It can be seen from Fig. 2 that in the lower opening portion 30, a sealing ring 32 having a substantially rectangular cross-section is arranged and supported on a shoulder portion 48 of the casing 10. It can be further seen that the seal ring 32 on the side facing the collar 34 includes a convex spherical shape, as shown by reference numeral 50 in the figure. The diameter of the convex curvature radius is slightly smaller than the diameter of the spherical sealing surface 36, so that there is a linear load between the sealing ring 32 and the sealing surface 36, as indicated by 52. This linear load is irrelevant to whether the ball valve shaft 14 undergoes a change in inclination or not, especially for operation. Therefore, the contact line 52 is movable but still maintains an effective seal. Due to the elastic effect of the coil spring 38, the collar 34 is pressed against the seal ring. This paper is suitable for the standard of the paper (CNS) A4 specification (210 * 297 male «> (锖 Please read the precautions on the back before (Fill in this page)-Printed by a member of the Intellectual Property Bureau of the Ministry of Economic Affairs and printed by a consumer cooperative

5. Description of the invention (3) On the ring 32, the medium pressure in the casing 10 can further support this effect. In order to further obtain an additional seal between the seal ring 32 and the opening portion 30 or the shoulder 48, an O-ring 52a is applied in a corresponding recess at a corner transverse to the spherical curvature 50. The seal ring 32 can be made of any material, such as gold tincture, graphite, synthetic rubber, or the like. FIG. 3 shows detail 3 according to FIG. 1 (circled in the figure). I can see that the pressure ring 28 in the upper part has a convex spherical curve on the side facing the ball valve shaft 14, as shown by reference numeral 54. In this manner, it can cause a linear load 56 under the coil spring under the spring assembly 38. With these devices, the torque required to adjust the ball plug 12 can be reduced. The slight inclination of the ball valve shaft 14 described above does not damage the uniform spring pressure, and therefore, a uniform impact force on the seal ring 24 by the pressure spring 28 can be implemented according to the fourth embodiment of the scope of patent application. In terms of form, it contains the same parts as in FIG. 1 and is marked with the same reference numerals. It can be seen from FIG. 4 that a sealing fitting 32a is arranged in the recess 26 of the housing 10, and the difference between the sealing fitting 32a and that shown in FIG. 1 lies in that on the outer periphery of the sealing ring A V-shaped spring 60 is applied to a ring-shaped notch having a triangular cross-section. This spring 60 squeezes the parts of the seal ring apart, and thus makes the seal ring abut against the collar 34 of the ball valve shaft I4 »Therefore, the coil spring shown in Figure 1 can be used. With the aid of the nut 40 and a cylindrical element 62, a pre-tension can be generated. The element 62 is pressed against the seal 24, and thus the collar 34 is squeezed. The paper size is applicable to a national standard (CNS) A4 specification (210 X 297 male * > 锖 Read Read Back

Order I Printed by 1T Consumer Property Cooperative of the Ministry of Economic Affairs

V. Description of the invention (π) The pressure of the seal fitting 32a was pressed against the seal fitting 32a by the printing of the shelling consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The element 62 includes a radial flange 64 which can be used to limit the pretension by abutting against the outer side of the housing 10. In this portion, a smaller sealing ring 66 may be allowed to be disposed inside the casing 10. With the aid of a camming element 62 at its upper edge end 68, the required pretension can be set or changed. Furthermore, it can compensate for wear. For this purpose, the nut 40 must be turned on the ball valve shaft 14. A fixing bolt 70 is used to fix the rotation setting of the nut 40 on the ball valve shaft 14. It can be further seen from Fig. 4 that the lower end of the casing below the ball valve shaft opening includes an inclined surface 72. The collar 34 includes a complementary inclined surface 74. The two annular inclined surfaces 72 and 74 may cause the metallic seal to melt the seal fitting 32a or the seal 24 under the effect of high heat. However, even in this condition, the tightness of the opening of the ball valve shaft 14 can be achieved. It should be understood that the pretension selected is still used to make the joint relatively easy to handle. The camming shape of the element 62 is also used for this purpose. Most of the ball valve systems shown in Fig. 5 are equivalent to those shown in Fig. 1, so the same parts are marked with the same reference numerals. It can be seen from FIG. 5 that the housing 10a at the position of the ball thief shaft opening 20 includes a circular tapered disc-shaped notch 80 adjacent to the ball valve shaft opening. On the edge < »The notch 80 can accommodate a third sealing ring 82 having a V-shaped cross section, wherein one branch of the sealing ring 82 is received by the notch 80 and the other branch is Abuts on the surface of the connected spherical plug 12. The sealing ring 82 is made of plastic or elastic material. In the seal ring 82, please-read first

Items r and t are filled and nested ^. I Revision The paper size is applicable to China Standard B (CNS) A4 (210 X 297); *)

Produced by Industrial and Consumer Cooperation of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (0) A ring spring 84 with a V-shaped cross section is installed to squeeze the branches of the seal ring 82 apart. In the situation shown in the figure, the spherical plug 12 is covered with a suitable material, such as PTFE, but the groove 18 for receiving the journal 16 is not covered, and the ball valve shaft 14 is also So so. Ball valve shaft Η can be composed of lower cost materials or products with higher torque requirements, such as anti-torsional materials such as adhesions or mass media. Since no product will exist in the inner space of the ball valve shaft, there will not be any threatening medium to invade the ball valve shaft. In Fig. 6, parts which are equivalent to the form of the embodiment shown in Fig. 1 are also denoted by the same reference numerals. It is further improved from FIG. 1 and according to the embodiment form of FIG. 6, it includes a sealing fitting 90, which is composed of a metal ring 92. The metal ring 92 faces the outer side of the spherical plug 12 for Match the contour of the spherical plug. The metal ring 92 includes a groove, in which a plastic ring 94 is arranged, which protrudes from the groove and is connected with the spherical plug. However, it is also possible to omit the plastic ring 94 and use only a metal ring or a ceramic ring that can fit a spherical geometry. Furthermore, by means of a sealing fitting, it is possible to prevent the medium from penetrating the ball valve shaft. A spring pressure system may be applied to the seal ring 94 or the seal fitting 90. However, in Fig. 6, the pretension is generated in different ways. The spherical plug 12 is mounted on one side of the bearing journal 96 which is transverse to the ball valve shaft 14. This bearing journal is firmly fixed in the housing 10b and is engaged in the recess 98 of the spherical plug 12. Between the upper edge end of the journal 96 and the bottom of the notch 98, a disc-shaped spring fitting 100 is arranged. The disc-shaped spring fitting 100 is then adapted to the Chinese national standard (CNS > A4 size (210 * 297)). Public «>----; ----- —— · {-装 -------- Order · (<#First read the note on the back * 5 ^ and then fill out this page > V. Description of the invention (, V) Pre-tension is applied to the ball valve shaft 14 in the direction of the ball valve shaft 14. The shown accessories have several advantages. "In this embodiment form, no external force will be applied to the ball valve The shaft seal ring 32 and 34. This seal fitting can also exhibit the function of a bearing ring at the same time. Another advantage is due to its anti-static characteristics, in which the electrostatic charge of the spherical plug 12 is passed through the disk The spring and bearing journal 96 are discharged from the housing 10b. The sealing fitting 90 is arranged in a suitable annular recess in the housing 10b. For its part, it is sealed by a sealing ring 102, which prevents the medium from penetrating into the space in the opening of the ball valve shaft. The seal 102 can be a type O ring, and it can be, For example, graphite, PTFE, or similar materials, but it can also be composed of, for example, a metal O-ring.-丨 I -----, 1_Γ · 装 -------- Order. ≪ »-" Read the precautions on the back and then fill out this page "> Printed on the paper standard by the Ministry of Economic Affairs, temporary industrial property bureau, Industrial Cooperative Cooperative, β National Standard < CNS) A4 Specification (210 X 297 Public Love >)

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention () Brief description of the drawing number 2 Details 3 Details 10 Housing 10b Housing 12 Spherical plug 14 Ball valve shaft 16 Journal 18 Notch 20 Opening 22 Open Hole 24 Seal 26 Shoulder 28 Pressure ring 30 Opening portion 32 Seal ring 32a Seal fitting 34 Shoulder 36 Seal surface 38 Spring assembly 40 Nut 42 Threaded portion 44 Nut 46 Manual lever 15 T! | Order ·! ! |! Line I (Please read the precautions on the back before filling this page) This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) V. Description of Invention () A7 B7 Intellectual Property Bureau, Ministry of Economic Affairs Printed by the staff consumer cooperative 48 Shoulder 50 Spherical curvature 52 Contact line 52a 0-ring 54 Area 56 Linear load 60 Spring 62 Cylindrical element 64 Flange 66 Seal ring 68 Upper edge end 70 Fixing bolt 72 Inclined surface 74 Inclined surface 80 notch 82 seal ring 84 spring 90 seal fitting 92 metal ring 94 plastic ring 96 journal 98 notch 100 spring fitting 102 seal ring 16 J ---.-------- ^ 0 Sincere -------- Order --------- Line I (Please read the precautions on the back before filling this page) This paper size is applicable to China National Standard (CNS) A4 specifications (210 X 297 mm)

Claims (1)

6. Applying for a patent Fan Gu, Intellectual Property Bureau of the Ministry of Economic Affairs, 8 Industrial and Consumer Cooperation Du Yinhua 1.-A ball valve, which has a ball valve shaft as a ball valve member, the ball valve shaft can be a ball valve shaft The wide hole of the rod rotates and is slightly inclined, and has a sealing surface formed on a collar on the opposite side of the ball valve member. The ball valve also has a sealing ring, which cooperates with the sealing surface and is Supported in a sealed manner on a stepped portion in the opening of the ball valve shaft, the ball valve has a spring that presses the sealing surface to abut against the sealing ring, wherein the sealing ring is basically Makes a linear contact with the sealing surface. 2. The ball valve according to item 1 of the patent application, wherein the sealing surface is formed in a concave shape in a cross-sectional shape. 3. The ball valve according to item 2 of the scope of patent application, wherein the seal ring has a circular arc shape at the bearing portion on the sealing surface. 4. The ball valve according to item 2 or 3 of the patent application, wherein the radius of curvature of the sealing ring is smaller than the radius of curvature of the sealing surface. 5. The ball valve according to item 1 of the scope of patent application, wherein the cross-sectional shape of the seal ring at the other parts is rectangular, and is supported by a supporting member suitable for the shape. 6. The ball valve according to item 1 of the scope of patent application, which further provides a gland-shaped seal having a sealing ring installed in the opening of the ball valve shaft and a pressure ring. The pressure ring is It is struck by a spring, and it squeezes the gland-shaped sealing ring to abut against a shoulder in the opening of the ball valve shaft. 7. The ball valve according to item 6 of the patent application, wherein the spring is a coil spring and the pressure ring is in linear contact with the coil spring. I ______; --_--; -------- install -------- order ------ k (please read the note on the back before filling this page) This paper Standard size ΛMedium circle · House standard rate (CNS) A4 size (210X297 male thin) 6. Patent application scope 8. The ball valve according to item 7 of the scope of patent application, wherein the pressure ring is convexly curved at the position where it is connected with the coil spring. 9. Ball valve according to item 1 of the scope of patent application, wherein the seal ring includes a recess at the outer periphery, and a ring spring is arranged therein, especially a V-shaped spring, which can be used on the collar and the housing A squeezing force is generated between the ball valve according to item 1 of the patent application. One of the nut on the ball valve shaft outside the housing is acting on a ring-shaped house force element. The element is installed inside the opening of the housing for the ball valve shaft to generate a pressure between the collar and the sealing ring. ≫ 11. The ball valve according to item 1 of the patent application scope, wherein the collar The system includes a ring-shaped inclined surface, and the housing system includes a complementary inclined surface. When these sealing rings are melted under a certain high heat, they can cooperate with each other in a metallic sealing manner. 12. The ball valve according to item 1 of the scope of the patent application, wherein a third sealing fitting is arranged between the housing and the spherical plug, and is held on the spherical plug. Π. The ball valve according to item 12 of the scope of patent application, wherein the first seal fitting is composed of a first ring made of a rigid material and a second ring made of a flexible material, wherein the second ring is Installed in an annular groove in one of the first rings. 14. One of the spring fittings of the ball valve according to item 13 of the scope of the patent application is to generate a pretension between the ball plug and the third sealing fitting. 15. Ball valve according to item 14 of the scope of patent application 'wherein the pre-tension _____2_; __ This paper size is applicable to China_Home sample rate (CNS > A4 specification (210X297 mm) 2' —1 * ϋ In m-- 1- ϋ ^ Γ ί · n I,-/ 1 < Please read the note f on the back before filling this page) Order 'Punch, printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 386151 mmm B8 C8 D8 The patent application is generated by a spring, and preferably a coil spring, which is arranged between the release member of the spherical plug and the bearing journal. "16. A ball valve, especially according to the scope of the patent application The ball valve according to any one of items 12 to 14, wherein a deformable third sealing ring is arranged between the housing and the spherical plug, the cross-sectional shape is V-shaped, and a spring is installed in the recess. The spring is used to press the branches of the seal ring to separate them, so that the branches are pressed against the opposite surface of the spherical plug. 17. The ball valve according to item 16 of the patent application, wherein the metal spring is ring-shaped and its cross-section is V-shaped. 18. The ball valve according to item 16 of the application, wherein the sealing ring is made of a plastic material covered with an elastic material. 19. The ball valve according to item 16 of the application, wherein the third seal ring is installed in an annular recess, and the recess is located on the radial edge of the ball valve shaft opening. ^ -------- install ------ order ------ k (please «read the notes on the back before filling out this page) Printed by the Consumers’ Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 逋if NsTc Special 29