Double-ball valve with self-locking protection function

Abstract

The invention relates to the technical field of double-ball valves, and discloses a double-ball valve with a self-locking protection function, which comprises a ball valve shell, a mounting space is arranged in the ball valve shell, a fluid channel is arranged at the center axis of the ball valve shell, and a plurality of valve balls are arranged in the mounting space of the ball valve shell. The inner side of the sealing cover is arranged to be in the shape of the semicircular groove matched with the valve ball, so that the valve ball can stably rotate in the sealing cover; when the contact ring in the sealing cover extrudes the valve ball, the sealing cover drives the sliding ring to slide along the interior of the sealing cylinder and extrudes the multiple extrusion springs, and the extrusion effect of the contact ring on the sealing cover on the valve ball is enhanced through the counter-acting force of the extrusion springs. And a gap is prevented from being generated when the valve ball and the inner wall of the ball valve shell rotate, so that the flow of the double-ball valve can be more accurately controlled.

Description

Technical Field

[0001] The invention relates to the technical field of double ball valves, in particular to a double ball valve with a self-locking protection function. Background Art

[0002] Double Ball Valve is a valve device commonly used in pipeline systems. It has two balls and controls the flow of fluid through their movement. The structural design of the double ball valve is relatively complex. It is usually composed of two spherical valve cores, valve seats, valve bodies, etc., which can better achieve the regulation and isolation of fluids. Double ball valves can be used in a variety of pipeline control systems, with efficient flow control and reliable sealing performance.

[0003] The double ball valve under the existing technology can basically meet the use requirements, but the sealing surface between the ball valve body and the ball under the existing technology may be worn, scratched or damaged due to long-term use, causing the sealing surface to loosen or have gaps, resulting in reduced sealing performance and further leakage. Summary of the invention

[0004] The object of the present invention is to provide a double ball valve with a self-locking protection function to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a double ball valve with a self-locking protection function, comprising a ball valve housing, an installation space is arranged inside the ball valve housing, a fluid channel is arranged at the central axis of the ball valve housing, and a plurality of valve balls are arranged inside the installation space of the ball valve housing, including: The sealing part is installed at both ends of the ball valve housing, and the sealing part is used to connect the openings at both ends of the ball valve housing with the fluid pipeline, and the sealing part is used to seal the fluid channel between the valve ball and the ball valve housing; An adjusting part, the adjusting part is mounted on the top of the ball valve housing, the bottom of the adjusting part extends to the fluid channel inside the ball valve housing, the bottom of the adjusting part is clamped with the top of the valve ball, and the adjusting part is used to adjust the rotation angle of the valve ball; and; The locking part is installed at the bottom of the ball valve housing, the top of the locking part extends to the bottom of the valve ball, the top of the locking part is clamped with the bottom of the valve ball, and the locking part is used to lock the angle adjustment of the valve ball by the adjusting part; Among them, the adjusting part cooperates with the sealing part, and the adjusting part drives the sealing part to enhance the sealing between the valve ball and the inner wall of the ball valve housing. The locking part at the bottom of the valve ball is driven to rotate by the adjusting part, and the locking part rotates stably with the valve ball.

[0006] Further, the sealing portion comprises: The mounting piece is mounted on the openings at both ends of the ball valve housing through a plurality of bolts, and one end of the sealing portion close to the ball valve housing is mounted inside the mounting space of the ball valve housing. The mounting piece is used to connect the ball valve housing with the fluid pipeline; The seal is installed at one end of the sealing part close to the installation space inside the ball valve housing, and the end of the seal close to the fluid channel inside the ball valve housing is pressed against the surface of the valve ball. The seal is used to seal the surface of the valve ball with the fluid channel of the ball valve housing.

[0007] Furthermore, the mounting part includes a plurality of valve seats fixedly connected to the openings at both ends of the ball valve housing, and an end of the valve seat away from the port of the ball valve housing is fixedly connected to a mounting flange, and the mounting flange is used to connect an external fluid pipeline, and a base sealing ring is arranged between the valve seat and the outer wall of the port of the ball valve housing, and the base sealing ring is used to seal the connection between the mounting flange and the port of the ball valve housing.

[0008] Furthermore, the sealing member includes a sealing cylinder slidably connected to the inside of the valve seat, wherein one end of the sealing cylinder away from the mounting flange extends to the vicinity of the fluid passage inside the ball valve housing, and one end of the sealing cylinder close to the valve ball is fixedly connected to a sealing cover, wherein the inner side of the sealing cover is hemispherical, and the inner hemispherical shape of the sealing cover fits the surface of the valve ball, and a plurality of contact rings are arranged on the inner side of the sealing cover, which are squeezed against the surface of the valve ball, and the sealing cover is squeezed and sealed against the surface of the valve ball through the contact rings.

[0009] Furthermore, the adjustment unit includes: The regulating valve component is installed on the top of the ball valve housing, and the bottom of the regulating valve component is clamped with the top of the valve ball. The angle of the valve ball at the bottom of the regulating valve component is changed by adjusting the top of the regulating valve component. Auxiliary parts are installed inside the ball valve housing. The auxiliary parts are set in the middle of the valve regulating part. The bottom of the auxiliary parts is squeezed with the top of the sealing part. The auxiliary parts are used to limit the rotation angle of the valve ball controlled by the valve regulating part. The auxiliary parts are also used to assist the sealing effect of the sealing part.

[0010] Furthermore, the regulating valve member includes a plurality of connecting seats fixedly mounted on the top of the ball valve housing, a rotating sleeve is threadedly connected to the central axis of the connecting seat, the bottom of the rotating sleeve extends to the inside of the ball valve housing, the inner cavity of the rotating sleeve is rotatably connected to the regulating valve stem, the rotating sleeve is used to limit the rotation of the regulating valve stem, the bottom of the regulating valve stem is clamped with the top of the valve ball, and the side wall of one end of the regulating valve stem away from the inside of the ball valve housing is fixedly connected to the regulating handle; Among them, the middle part of the regulating valve stem is sleeved with a special-shaped extrusion sleeve, and the special-shaped extrusion sleeve is provided with an extrusion bevel groove. The regulating valve stem slides inside the ball valve housing. The regulating valve stem is fixedly connected with a limiting protrusion near the extrusion bevel groove of the special-shaped extrusion sleeve. The bottom of the limiting protrusion is squeezed with the extrusion bevel groove on the special-shaped extrusion sleeve. The bottom of the regulating valve stem is sleeved with a clamping spring. The bottom of the clamping spring is fixedly connected with a clamping gasket. The bottom of the clamping gasket is fixedly connected with a valve stem sealing ring. The valve stem sealing ring is used to seal the gap between the ball valve housing and the regulating valve stem.

[0011] Furthermore, the auxiliary part includes a pushing rod fixedly connected to the side wall of the special-shaped extrusion sleeve, the end of the pushing rod away from the special-shaped extrusion sleeve is fixedly connected to a clamping telescopic rod, the end of the clamping telescopic rod close to the pushing rod is provided with a spring, the bottom of the clamping telescopic rod is fixedly connected to an extrusion rod, the extrusion rod is slidably connected to the interior of the ball valve housing, a semicircular extrusion head is provided at the bottom of the extrusion rod, and an extrusion arc ring is fixedly connected to the end of the sealing cover close to the sealing cylinder, and the extrusion arc ring is squeezed with the semicircular extrusion head at the bottom of the extrusion rod.

[0012] Further, the locking portion comprises: A stabilizing member is installed on the bottom inner wall of the ball valve housing and is used to assist the valve ball in stable rotation; A self-locking piece is installed at the bottom of the stabilizing piece and is used to clamp the bottom of the stabilizing piece.

[0013] Furthermore, a stabilizing member includes a plurality of stabilizing bases fixedly connected to the bottom of the ball valve housing, a limiting groove is provided at the bottom of the ball valve housing, a rotating shaft is rotatably connected to the top inner wall of the limiting groove, a clamping block is fixedly connected to the top of the rotating shaft, a clamping groove is provided at the bottom of the valve ball, and the clamping block at the top of the rotating shaft is clamped in the clamping groove at the bottom of the valve ball.

[0014] Furthermore, the self-locking part includes an active latch tooth fixedly connected to the bottom of the rotating shaft, an auxiliary latch tooth is slidably connected inside the limiting groove, the top of the auxiliary latch tooth is meshed with the bottom of the active latch tooth, and the side wall of the auxiliary latch tooth is fixedly connected to a plurality of limiting sliders, the limiting sliders are slidably connected inside the limiting groove, and the bottom of the auxiliary latch tooth is fixedly connected to a locking spring.

[0015] The present invention has the following beneficial effects: (1) In the present invention, when the valve seat is installed by bolts, the sealing cover at one end of the sealing cylinder inside the valve seat is pressed against the surface of the valve ball inside the ball valve housing. At this time, the inner side of the sealing cover is in contact with the surface of the valve ball. This arrangement is conducive to strengthening the sealing performance of the valve ball and the sealing cover on the valve. At the same time, the inner side of the sealing cover is arranged as a semicircular groove that fits the valve ball, which is conducive to the stable rotation of the valve ball inside the sealing cover. When the contact ring inside the sealing cover is pressed against the valve ball, the sealing cover drives the sliding ring to slide along the inside of the sealing cylinder and squeeze a plurality of squeezing springs. The reaction force of the squeezing springs enhances the squeezing effect of the contact ring on the sealing cover on the valve ball. Therefore, through the close fit between the sealing member and the valve ball, a gap is avoided when the valve ball and the inner wall of the ball valve housing rotate, thereby enabling the double ball valve to more accurately control the flow of the valve.

[0016] (2) The present invention provides an adjustment portion. When adjusting the size of the valve ball opening inside the valve, the regulating valve stem rotates to drive the limiting protrusion to slide along the special-shaped bevel groove on the special-shaped extrusion sleeve. At this time, since the special-shaped bevel groove on the special-shaped extrusion sleeve is 90°, the rotation angle of the regulating valve stem is limited to 90°. This arrangement is conducive to making the regulating valve stem drive the valve ball to rotate within a range of 0° to 90°.

[0017] (3) In the present invention, in addition, when the regulating valve stem slides along the special-shaped inclined groove on the special-shaped extrusion sleeve, the limiting protrusion drives the special-shaped extrusion sleeve to slide downward, and the special-shaped extrusion sleeve slides downward to drive the compression gasket at the bottom of the compression spring to be squeezed. At this time, the squeezing force of the compression gasket on the valve stem sealing ring is increased, which is beneficial to enhance the sealing between the regulating valve stem and the inner wall of the ball valve housing.

[0018] (4) In the present invention, when the special-shaped extrusion sleeve slides downward, the special-shaped extrusion sleeve drives the compression telescopic rod at one end of the push rod to drive the extrusion rod downward to extrude the extrusion arc ring. The extrusion arc ring is extruded to drive the contact ring on the sealing cover to exert a greater extrusion force on the valve ball. This arrangement is conducive to further ensuring the stability of the valve ball.

[0019] (5) The present invention provides a locking portion. When the regulating handle of the valve is not rotated, the locking spring squeezes the auxiliary latch tooth to slide upward along the limit groove onto the active latch tooth, so that the auxiliary latch tooth self-locks the active latch tooth. At this time, the card block on the rotating shaft at the top of the active latch tooth is clamped in the card groove at the bottom of the valve ball, which is conducive to making the valve ball more stable inside the ball valve housing; when the angle of the valve ball needs to be adjusted, the valve ball at the bottom of the regulating valve stem can be driven to rotate by rotating the regulating handle, and the valve ball drives the active latch tooth at the bottom of the card block to disengage from the limit slider by increasing the torque.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial cross-sectional structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the ball valve housing of the present invention; Figure 4 For the present invention Figure 3 A magnified view of middle; Figure 5 This is a schematic diagram of the cross-sectional structure of the sealing portion of the present invention; Figure 6 It is a schematic diagram of the internal structure of the regulating part of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of middle B; Figure 8 It is a schematic diagram of the locking part structure of the present invention; Fig. 9 For the present invention Figure 8 Enlarged view of C in the middle.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows: In the figure: 1. Ball valve housing; 2. Sealing part; 21. Mounting part; 211. Valve seat; 212. Mounting flange; 213. Sealing ring of base; 22. Sealing part; 221. Sealing cylinder; 222. Sealing cover; 223. Contact ring; 224. Sliding ring; 225. Extrusion spring; 3. Adjusting part; 31. Valve adjusting part; 311. Connecting seat; 312. Rotating sleeve; 313. Adjusting valve stem; 314. Adjusting handle; 315. Special-shaped extrusion sleeve; 316. Limiting convex block; 317. Compression spring; 318, compression gasket; 319, valve stem sealing ring; 32, auxiliary part; 321, push rod; 322, compression telescopic rod; 323, extrusion rod; 324, extrusion arc ring; 4, locking part; 41, stabilizing part; 411, stabilizing base; 412, limiting groove; 413, rotating shaft; 414, clamping block; 415, clamping groove; 42, self-locking part; 421, active clamping tooth; 422, auxiliary clamping tooth; 423, limiting slider; 424, locking spring; 5, valve ball. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example 1, please refer to Figure 1-Figure 6 As shown, the present invention is a double ball valve with a self-locking protection function, including a ball valve housing 1, an installation space is provided inside the ball valve housing 1, a fluid channel is provided at the central axis of the ball valve housing 1, and a plurality of valve balls 5 are provided inside the installation space of the ball valve housing 1, including: The sealing part 2 is installed at both ends of the ball valve housing 1. The sealing part 2 is used to connect the openings at both ends of the ball valve housing 1 with the fluid pipeline. The sealing part 2 is used to seal the fluid passage between the valve ball 5 and the ball valve housing 1; An adjusting portion 3, the adjusting portion 3 is mounted on the top of the ball valve housing 1, the bottom of the adjusting portion 3 extends to the fluid channel inside the ball valve housing 1, the bottom of the adjusting portion 3 is engaged with the top of the valve ball 5, and the adjusting portion 3 is used to adjust the rotation angle of the valve ball 5; and; The locking part 4 is installed at the bottom of the ball valve housing 1, and the top of the locking part 4 extends to the bottom of the valve ball 5. The top of the locking part 4 is engaged with the bottom of the valve ball 5. The locking part 4 is used to lock the angle adjustment of the valve ball 5 by the adjusting part 3; Among them, the adjusting part 3 cooperates with the sealing part 2, and the adjusting part 3 drives the sealing part 2 to enhance the sealing between the valve ball 5 and the inner wall of the ball valve housing 1. The locking part 4 at the bottom of the valve ball 5 is driven to rotate by the adjusting part 3, and the locking part 4 rotates stably with the valve ball 5.

[0026] The sealing part 2 comprises: The mounting member 21 is mounted on the openings at both ends of the ball valve housing 1 by means of a plurality of bolts. The end of the sealing portion 2 close to the ball valve housing 1 is mounted inside the mounting space of the ball valve housing 1. The mounting member 21 is used to connect the ball valve housing 1 with the fluid pipeline; The seal 22 is installed at one end of the sealing part 2 close to the internal installation space of the ball valve housing 1. The end of the seal 22 close to the internal fluid channel of the ball valve housing 1 is pressed against the surface of the valve ball 5. The seal 22 is used to seal the surface of the valve ball 5 and the fluid channel of the ball valve housing 1.

[0027] The mounting member 21 includes a plurality of valve seats 211 fixedly connected to the openings at both ends of the ball valve housing 1. The end of the valve seat 211 away from the port of the ball valve housing 1 is fixedly connected with a mounting flange 212. The mounting flange 212 is used to connect to an external fluid pipeline. A base sealing ring 213 is provided between the valve seat 211 and the outer wall of the port of the ball valve housing 1. The base sealing ring 213 is used to seal the connection between the mounting flange 212 and the port of the ball valve housing 1. The function of this component is that when the double ball valve is used, the valve seats 211 are first fixedly installed on both ends of the ball valve housing 1 by bolts. At this time, the mounting flange 212 at one end of the valve seat 211 is installed as a whole with the fluid pipeline to be installed. The provision of the base sealing ring 213 is beneficial to enhancing the sealing performance between the valve seat 211 and the ball valve housing 1.

[0028] The sealing member 22 comprises a sealing cylinder 221 which is slidably connected to the inside of the valve seat 211. One end of the sealing cylinder 221 which is away from the mounting flange 212 extends to the vicinity of the fluid passage inside the ball valve housing 1. One end of the sealing cylinder 221 which is close to the valve ball 5 is fixedly connected to a sealing cover 222. The inner side of the sealing cover 222 is hemispherical. The inner hemispherical shape of the sealing cover 222 fits the surface of the valve ball 5. A plurality of contact rings 223 are arranged on the inner side of the sealing cover 222. The contact rings 223 are pressed against the surface of the valve ball 5. The sealing cover 222 is pressed against the surface of the valve ball 5 through the contact rings 223 to seal. The function of this component is that when the valve seat 211 is installed by bolts, the sealing cover 222 at one end of the sealing cylinder 221 inside the valve seat 211 is pressed against the surface of the valve ball 5 inside the ball valve housing 1. At this time, the sealing cover 222 The inner side is in contact with the surface of the valve ball 5. This arrangement is beneficial to strengthening the sealing of the valve ball 5 and the sealing cover 222 to the valve. At the same time, the inner side of the sealing cover 222 is arranged as a semicircular groove that fits the valve ball 5, which is beneficial to the stable rotation of the valve ball 5 inside the sealing cover 222. When the contact ring 223 inside the sealing cover 222 is squeezed with the valve ball 5, the sealing cover 222 drives the sliding ring 224 to slide along the inside of the sealing cylinder 221 and squeeze a plurality of squeezing springs 225. The reaction force of the squeezing springs 225 enhances the squeezing effect of the contact ring 223 on the sealing cover 222 on the valve ball 5. Therefore, through the close fit between the sealing member 22 and the valve ball 5, a gap is avoided when the valve ball 5 and the inner wall of the ball valve housing 1 rotate, so that the double ball valve can more accurately control the flow of the valve.

[0029] Embodiment 2 is different from Embodiment 1 in that: Figure 1-Figure 9 As shown, the adjustment unit 3 includes: The regulating valve member 31 is installed on the top of the ball valve housing 1, and the bottom of the regulating valve member 31 is clamped with the top of the valve ball 5. By adjusting the top of the regulating valve member 31, the angle of the valve ball 5 at the bottom of the regulating valve member 31 is changed; The auxiliary part 32 is installed inside the ball valve housing 1. The auxiliary part 32 is set in the middle of the valve regulating part 31. The bottom of the auxiliary part 32 is squeezed with the top of the sealing part 22. The auxiliary part 32 is used to limit the rotation angle of the valve regulating part 31 to control the valve ball 5. The auxiliary part 32 is also used to assist the sealing effect of the sealing part 22.

[0030] The regulating valve member 31 comprises a plurality of connecting seats 311 fixedly mounted on the top of the ball valve housing 1, a rotating sleeve 312 is threadedly connected to the central axis of the connecting seat 311, the bottom of the rotating sleeve 312 extends to the inside of the ball valve housing 1, and the inner cavity of the rotating sleeve 312 is rotatably connected to a regulating valve stem 313, the rotating sleeve 312 is used to limit the rotation of the regulating valve stem 313, the bottom of the regulating valve stem 313 is clamped with the top of the valve ball 5, and an adjusting handle 314 is fixedly connected to the side wall of one end of the regulating valve stem 313 away from the inside of the ball valve housing 1; Among them, the middle part of the regulating valve stem 313 is sleeved with a special-shaped extrusion sleeve 315, and the special-shaped extrusion sleeve 315 is provided with an extrusion bevel groove. The regulating valve stem 313 slides inside the ball valve housing 1, and the regulating valve stem 313 is fixedly connected to a limiting protrusion 316 near the extrusion bevel groove of the special-shaped extrusion sleeve 315. The bottom of the limiting protrusion 316 is squeezed with the extrusion bevel groove on the special-shaped extrusion sleeve 315. The bottom of the regulating valve stem 313 is sleeved with a clamping spring 317, and the bottom of the clamping spring 317 is fixedly connected with a clamping gasket 318, and the bottom of the clamping gasket 318 is fixedly connected with a valve stem sealing ring 319. The valve stem sealing ring 319 is used to seal the gap between the ball valve housing 1 and the regulating valve stem 313. The function of this component is to adjust the valve stem by setting the adjusting part 3 when adjusting the opening size of the valve ball 5 inside the valve. The rotation of 313 drives the limiting protrusion 316 to slide along the special-shaped bevel groove on the special-shaped extrusion sleeve 315. At this time, since the special-shaped bevel groove on the special-shaped extrusion sleeve 315 is 90°, the rotation angle of the regulating valve stem 313 is limited to 90°. This arrangement is conducive to the regulating valve stem 313 driving the valve ball 5 to rotate within a range of 0° to 90°. In addition, when the regulating valve stem 313 slides along the special-shaped bevel groove on the special-shaped extrusion sleeve 315, the limiting protrusion 316 drives the special-shaped extrusion sleeve 315 to slide downward. The special-shaped extrusion sleeve 315 slides downward and drives the compression gasket 318 at the bottom of the compression spring 317 to be squeezed. At this time, the squeezing force of the compression gasket 318 on the valve stem sealing ring 319 is increased, which is conducive to enhancing the sealing between the regulating valve stem 313 and the inner wall of the ball valve housing 1.

[0031] The auxiliary part 32 includes a push rod 321 fixedly connected to the side wall of the special-shaped extrusion sleeve 315, and the end of the push rod 321 away from the special-shaped extrusion sleeve 315 is fixedly connected to a compression telescopic rod 322, and the end of the compression telescopic rod 322 close to the push rod 321 is provided with a spring, and the bottom of the compression telescopic rod 322 is fixedly connected to an extrusion rod 323, and the extrusion rod 323 is slidably connected to the inside of the ball valve housing 1. A semicircular extrusion head is provided at the bottom of the extrusion rod 323, and the end of the sealing cover 222 close to the sealing cylinder 221 is fixed. An extrusion arc ring 324 is connected, and the extrusion arc ring 324 is extruded with the semicircular extrusion head at the bottom of the extrusion rod 323. The function of this component is that when the special-shaped extrusion sleeve 315 slides downward, the special-shaped extrusion sleeve 315 drives the compression telescopic rod 322 at one end of the push rod 321 to drive the extrusion rod 323 downward to extrude the extrusion arc ring 324. The extrusion arc ring 324 is squeezed and drives the contact ring 223 on the sealing cover 222 to exert a greater extrusion force on the valve ball 5. This arrangement is conducive to further ensuring the stability of the valve ball 5.

[0032] The locking portion 4 comprises: A stabilizing member 41, which is mounted on the bottom inner wall of the ball valve housing 1, and is used to assist the valve ball 5 in stable rotation; The self-locking member 42 is installed at the bottom of the stabilizing member 41 , and is used to clamp the bottom of the stabilizing member 41 .

[0033] The stabilizing member 41 includes a plurality of stabilizing bases 411 fixedly connected to the bottom of the ball valve housing 1. A limiting groove 412 is provided at the bottom of the ball valve housing 1. A rotating shaft 413 is rotatably connected to the top inner wall of the limiting groove 412. A clamping block 414 is fixedly connected to the top of the rotating shaft 413. A clamping groove 415 is provided at the bottom of the valve ball 5. The clamping block 414 at the top of the rotating shaft 413 is clamped in the clamping groove 415 at the bottom of the valve ball 5.

[0034] The self-locking member 42 includes an active latch tooth 421 fixedly connected to the bottom of the rotating shaft 413, an auxiliary latch tooth 422 is slidably connected inside the limiting groove 412, the top of the auxiliary latch tooth 422 is meshed with the bottom of the active latch tooth 421, and the side wall of the auxiliary latch tooth 422 is fixedly connected to a plurality of limiting sliders 423, the limiting sliders 423 are slidably connected inside the limiting groove 412, and a locking spring 424 is fixedly connected to the bottom of the auxiliary latch tooth 422. The function of this component is to set the locking part 4, and when the regulating handle 314 of the valve is not rotated, the locking spring 424 squeezes the auxiliary latch tooth 422 The active latch tooth 421 slides upward along the limiting groove 412, so that the auxiliary latch tooth 422 self-locks the active latch tooth 421. At this time, the block 414 on the rotating shaft 413 at the top of the active latch tooth 421 is clamped in the groove 415 at the bottom of the valve ball 5, which is conducive to making the valve ball 5 more stable inside the ball valve housing 1; when the angle of the valve ball 5 needs to be adjusted, the valve ball 5 at the bottom of the regulating valve stem 313 can be driven to rotate by rotating the adjusting handle 314, and the valve ball 5 drives the active latch tooth 421 at the bottom of the block 414 to disengage from the self-locking with the limiting slider 423 by increasing the torque.

[0035] A specific application of this embodiment is: When the valve seat 211 is installed by bolts, the sealing cover 222 at one end of the sealing cylinder 221 inside the valve seat 211 is pressed against the surface of the valve ball 5 inside the ball valve housing 1. At this time, the inner side of the sealing cover 222 fits the surface of the valve ball 5. This arrangement is conducive to strengthening the sealing of the valve by the valve ball 5 and the sealing cover 222. At the same time, the inner side of the sealing cover 222 is set to a semicircular groove shape that fits the valve ball 5, which is conducive to the stable rotation of the valve ball 5 inside the sealing cover 222. When the contact ring 223 inside the sealing cover 222 is pressed against the valve ball 5, the sealing cover 222 drives the sliding ring 224 to slide along the inside of the sealing cylinder 221 and squeeze a plurality of squeezing springs 225. The reaction force of the squeezing springs 225 enhances the squeezing effect of the contact ring 223 on the sealing cover 222 on the valve ball 5. Therefore, through the close fit between the sealing member 22 and the valve ball 5, a gap is avoided when the valve ball 5 rotates with the inner wall of the ball valve housing 1, so that the double ball valve can more accurately control the flow of the valve. By setting the adjusting part 3, when adjusting the opening size of the valve ball 5 inside the valve, the regulating valve stem 313 rotates to drive the limiting protrusion 316 to slide along the special-shaped inclined groove on the special-shaped extrusion sleeve 315. At this time, since the special-shaped inclined groove on the special-shaped extrusion sleeve 315 is 90°, the rotation angle of the regulating valve stem 313 is limited to 90°. This arrangement is conducive to making the regulating valve stem 313 drive the valve ball 5 to rotate within a range of 0° to 90°. In addition, when the regulating valve stem 313 moves along the special-shaped extrusion sleeve 315, the regulating valve stem 313 is rotated to drive the limiting protrusion 316 to slide along the special-shaped inclined groove on the special-shaped extrusion sleeve 315. When the special-shaped inclined groove on the ball valve body 31 slides, the limiting protrusion 316 drives the special-shaped extrusion sleeve 315 to slide downward, and the special-shaped extrusion sleeve 315 slides downward to drive the compression gasket 318 at the bottom of the compression spring 317 to be squeezed. At this time, the compression force of the compression gasket 318 on the valve stem sealing ring 319 is increased, which is conducive to enhancing the sealing between the regulating valve stem 313 and the inner wall of the ball valve housing 1; when the special-shaped extrusion sleeve 315 slides downward, the special-shaped extrusion sleeve 315 drives the compression gasket 318 at one end of the push rod 321 to be squeezed. The telescopic rod 322 drives the extrusion rod 323 downward to squeeze the extrusion arc ring 324. The extrusion arc ring 324 is squeezed to drive the contact ring 223 on the sealing cover 222 to exert a greater extrusion force on the valve ball 5. This arrangement is conducive to further ensuring the stability of the valve ball 5. By setting the locking portion 4, when the regulating handle 314 of the valve is not rotated, the locking spring 424 squeezes the auxiliary latch tooth 422 to slide upward along the limiting groove 412 onto the active latch tooth 421, so that the auxiliary latch tooth 422 is pressed against the active latch tooth 421. The active latch tooth 421 is self-locking, and the block 414 on the rotating shaft 413 at the top of the active latch tooth 421 is clamped in the slot 415 at the bottom of the valve ball 5, which is conducive to making the valve ball 5 more stable inside the ball valve housing 1; when the angle of the valve ball 5 needs to be adjusted, the valve ball 5 at the bottom of the adjusting valve stem 313 can be driven to rotate by rotating the adjusting handle 314, and the valve ball 5 drives the active latch tooth 421 at the bottom of the block 414 to disengage the self-locking with the limit slider 423 by increasing the torque.

[0036] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A double ball valve with a self-locking protection function, comprising a ball valve housing, an installation space is arranged inside the ball valve housing, a fluid channel is arranged at the central axis of the ball valve housing, and a plurality of valve balls are arranged inside the installation space of the ball valve housing, characterized in that: include: A sealing part, which is installed at both ends of the ball valve housing, and is used to connect the openings at both ends of the ball valve housing with the fluid pipeline, and is used to seal the fluid passage between the valve ball and the ball valve housing; An adjusting part, wherein the adjusting part is mounted on the top of the ball valve housing, the bottom of the adjusting part extends to the fluid channel inside the ball valve housing, the bottom of the adjusting part is engaged with the top of the valve ball, and the adjusting part is used to adjust the rotation angle of the valve ball; as well as; A locking portion, the locking portion is mounted on the bottom of the ball valve housing, the top of the locking portion extends to the bottom of the valve ball, the top of the locking portion is engaged with the bottom of the valve ball, and the locking portion is used to lock the angle adjustment of the valve ball by the adjusting portion; The adjusting part cooperates with the sealing part, and the adjusting part drives the sealing part to enhance the sealing between the valve ball and the inner wall of the ball valve housing. The locking part at the bottom of the valve ball is driven to rotate by the adjusting part, and the locking part rotates stably with the valve ball.

2. A double ball valve with self-locking protection function according to claim 1, characterized in that: The sealing portion comprises: A mounting member, wherein the mounting member is mounted at the openings at both ends of the ball valve housing through a plurality of bolts, and an end of the sealing portion close to the ball valve housing is mounted inside the mounting space of the ball valve housing, and the mounting member is used to connect the ball valve housing and the fluid pipeline; A seal is installed at one end of the sealing part close to the internal installation space of the ball valve housing, and one end of the seal close to the internal fluid channel of the ball valve housing is pressed against the surface of the valve ball. The seal is used to seal the surface of the valve ball and the fluid channel of the ball valve housing.

3. A double ball valve with self-locking protection function according to claim 2, characterized in that: The mounting part includes a plurality of valve seats fixedly connected to the openings at both ends of the ball valve housing, an end of the valve seat away from the port of the ball valve housing is fixedly connected to a mounting flange, the mounting flange is used to connect to an external fluid pipeline, a base sealing ring is arranged between the valve seat and the outer wall of the port of the ball valve housing, the base sealing ring is used to seal the connection between the mounting flange and the port of the ball valve housing.

4. The double ball valve with self-locking protection function according to claim 3 is characterized in that: The sealing member comprises a sealing cylinder slidably connected to the inside of the valve seat, wherein one end of the sealing cylinder away from the mounting flange extends to the vicinity of the fluid passage inside the ball valve housing, and one end of the sealing cylinder close to the valve ball is fixedly connected to a sealing cover, wherein the inner side of the sealing cover is hemispherical, and the inner hemispherical shape of the sealing cover fits the surface of the valve ball, and a plurality of contact rings are arranged on the inner side of the sealing cover, and the contact rings are pressed against the surface of the valve ball, and the sealing cover is pressed and sealed against the surface of the valve ball through the contact rings.

5. A double ball valve with self-locking protection function according to claim 4, characterized in that: The adjustment unit comprises: A valve regulating member, the valve regulating member is mounted on the top of the ball valve housing, the bottom of the valve regulating member is engaged with the top of the valve ball, and the angle of the valve ball at the bottom of the valve regulating member is changed by adjusting the top of the valve regulating member; An auxiliary part is installed inside the ball valve housing. The auxiliary part is arranged in the middle of the valve regulating part. The bottom of the auxiliary part is pressed against the top of the sealing part. The auxiliary part is used to limit the rotation angle of the valve ball controlled by the valve regulating part. The auxiliary part is also used to assist the sealing effect of the sealing part.

6. The double ball valve with self-locking protection function according to claim 5, characterized in that: The regulating valve member comprises a plurality of connecting seats fixedly mounted on the top of the ball valve housing, a rotating sleeve is threadedly connected to the central axis of the connecting seat, the bottom of the rotating sleeve extends to the inside of the ball valve housing, an regulating valve stem is rotatably connected to the inner cavity of the rotating sleeve, the rotating sleeve is used to limit the rotation of the regulating valve stem, the bottom of the regulating valve stem is clamped with the top of the valve ball, and an adjusting handle is fixedly connected to the side wall of one end of the regulating valve stem away from the inside of the ball valve housing; Among them, the middle part of the regulating valve stem is sleeved with a special-shaped extrusion sleeve, and the special-shaped extrusion sleeve is provided with an extrusion bevel groove. The regulating valve stem slides inside the ball valve housing. The regulating valve stem is fixedly connected with a limiting protrusion near the extrusion bevel groove of the special-shaped extrusion sleeve. The bottom of the limiting protrusion is squeezed with the extrusion bevel groove on the special-shaped extrusion sleeve. The bottom of the regulating valve stem is sleeved with a clamping spring, and the bottom of the clamping spring is fixedly connected with a clamping gasket. The bottom of the clamping gasket is fixedly connected with a valve stem sealing ring. The valve stem sealing ring is used to seal the gap between the ball valve housing and the regulating valve stem.

7. The double ball valve with self-locking protection function according to claim 6, characterized in that: The auxiliary part includes a pushing rod fixedly connected to the side wall of the special-shaped extrusion sleeve, the pushing rod is fixedly connected to a clamping telescopic rod at one end away from the special-shaped extrusion sleeve, a spring is sleeved on the end of the clamping telescopic rod close to the pushing rod, the bottom of the clamping telescopic rod is fixedly connected to an extrusion rod, the extrusion rod is slidably connected to the inside of the ball valve housing, a semicircular extrusion head is provided at the bottom of the extrusion rod, and an extrusion arc ring is fixedly connected to the end of the sealing cover close to the sealing cylinder, and the extrusion arc ring is squeezed with the semicircular extrusion head at the bottom of the extrusion rod.

8. The double ball valve with self-locking protection function according to claim 7, characterized in that: The locking portion comprises: A stabilizing member, the stabilizing member is mounted on the bottom inner wall of the ball valve housing, and the stabilizing member is used to assist the valve ball in stable rotation; A self-locking member is installed at the bottom of the stabilizing member, and is used to clamp the bottom of the stabilizing member.

9. The double ball valve with self-locking protection function according to claim 8, characterized in that: The stabilizing member includes a plurality of stabilizing bases fixedly connected to the bottom of the ball valve housing, a limiting groove is provided at the bottom of the ball valve housing, a rotating shaft is rotatably connected to the top inner wall of the limiting groove, a clamping block is fixedly connected to the top of the rotating shaft, a clamping groove is provided at the bottom of the valve ball, and the clamping block at the top of the rotating shaft is clamped in the clamping groove at the bottom of the valve ball.

10. A double ball valve with self-locking protection function according to claim 9, characterized in that: The self-locking component includes an active latch tooth fixedly connected to the bottom of the rotating shaft, an auxiliary latch tooth is slidably connected inside the limiting groove, the top of the auxiliary latch tooth is meshed with the bottom of the active latch tooth, a plurality of limiting sliders are fixedly connected to the side wall of the auxiliary latch tooth, the limiting slider is slidably connected inside the limiting groove, and a locking spring is fixedly connected to the bottom of the auxiliary latch tooth.

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