Large-flow ball valve with upper sealing function

Abstract

The invention provides a high-flow ball valve with an upper sealing function, and relates to the technical field of ball valves, the high-flow ball valve comprises a valve body and a packing, an annular mounting sleeve is welded to the center of the bottom end of a valve sealing end cover, and the packing is embedded in the annular mounting sleeve; two vertical supporting shafts are symmetrically welded to the top end of the outer edge part of the circumference of the sealing end cover, and a packing sealing piece is jointly installed on the two vertical supporting shafts in a sliding mode. The whole packing sealing piece is jointly composed of a large-diameter shaft ring at the top end and a small-diameter jacking sleeve welded to the bottom side of the large-diameter shaft ring, and the small-diameter jacking sleeve is matched with the annular installation sleeve in a sliding and inserting mode and makes contact with the packing in an abutting mode so as to conduct jacking sealing on the packing. Compared with the prior art that a plurality of evenly-distributed threaded parts are adopted to conduct jacking sealing on the packing sealing piece, the trouble that when the packing is tightened and replaced, multiple circles of threaded parts need to be sequentially screwed forwards and backwards can be omitted, and the tightening and replacing efficiency of the packing can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of ball valves, and in particular to a large-flow ball valve with an upper sealing function. Background Art

[0002] Large flow ball valves with sealing function are widely used in the oil industry due to their excellent sealing performance, efficient operation convenience and reliable maintenance characteristics. The pipeline system of the oil industry requires valves with high reliability, long life and low maintenance cost to ensure safe and stable operation.

[0003] In order to implement effective and stable top pressure sealing for the packing, most of the existing ball valves set the packing seal to be pushed and driven by multiple evenly distributed threaded parts. However, the multiple threaded parts are separately and independently arranged, and there is a lack of synchronous driving mechanism between them. As a result, when tightening or opening the packing seal, all the threaded parts need to be twisted forward and backward step by step, which is troublesome and inconvenient to operate, reducing the efficiency of tightening the packing seal and opening the seal to replace the packing. Summary of the invention

[0004] In view of this, the present invention provides a large flow ball valve with an upper sealing function to solve the problems of tightness of packing seals and low efficiency of opening the seals to replace the packings.

[0005] The technical solution proposed by the present invention is: a large flow ball valve with upper sealing function, specifically comprising: a valve body and packing, the top of the valve body is fixedly installed with a sealing end cover, the bottom center of the sealing end cover is welded with an annular mounting sleeve, and the annular mounting sleeve is used for embedding the packing;

[0006] Two vertical support shafts are symmetrically welded at the top of the circumferential outer edge of the sealing end cover, and packing seals are slidably installed on the two vertical support shafts; the packing seal is composed of a large-diameter shaft ring at the top and a small-diameter top pressure sleeve welded to the bottom side of the large-diameter shaft ring, wherein the small-diameter top pressure sleeve is inserted and matched with the annular installation sleeve and abuts against the packing to implement top pressure sealing on the packing;

[0007] The top parts of the two vertical support shafts are symmetrically penetrated and rotatably installed with two horizontal support threaded shafts, the tail parts of the horizontal support threaded shafts are fitted with a conical driven gear, and the threaded parts are screwed and fitted with a threaded ring; two connecting rods are symmetrically rotatably connected between the two threaded rings and the packing seals; the parts of the two vertical support shafts located above the horizontal support threaded shafts are welded and fitted with two limiting rings at upper and lower intervals, and a driving gear ring is rotatably installed between the two limiting rings, and the driving gear ring is meshed and driven with the two conical driven gears;

[0008] Two threaded rings, two connecting rods and packing seals are connected together to form two crank slider mechanisms. Through these two mechanisms, the two threaded rings sliding toward each other can drive the packing seal to slide up and down to implement compression sealing and force unloading and loosening of the packing; the two cross-bracing threaded shafts can synchronously rotate forward and reverse to drive the two threaded rings to slide toward each other, providing a tightening and loosening driving force for the packing seal to slide up and down; through two conical driven gears, the active gear ring can rotate forward and reverse to engage and drive the two cross-bracing threaded shafts to rotate forward and reverse synchronously, drive and control the packing seal to slide up and down, and implement one-time tightening and loosening of the packing, and when the two threaded rings are synchronously driven to slide away from a large stroke, they can pull and drive the packing seal to slide significantly, and the packing seal can be pulled out of the annular mounting sleeve at one time to open it and replace the packing.

[0009] Furthermore,

[0010] A horizontal handlebar is welded to the circumferential outer ring of the active gear ring.

[0011] Furthermore,

[0012] The outer circumference of the large-diameter shaft ring is symmetrically welded with two slip rings, the two slip rings are correspondingly slidably matched with the two vertical support shafts, and the tail ends of the two connecting rods are correspondingly rotatably connected with the two slip rings.

[0013] Furthermore,

[0014] A spherical valve cavity is provided inside the valve body, a spherical valve core is rotatably installed inside the spherical valve cavity, and a vertical valve shaft is welded to the top of the spherical valve core;

[0015] Two water inlet and outlet pipes are symmetrically welded through the side wall of the spherical valve cavity, one for water inlet and the other for water outlet, and the ends of the two water inlet and outlet pipes located inside the spherical valve cavity are both spherical oblique-section structures, and the outer spherical surface of the spherical valve core fits and seals with the two spherical oblique-section structures.

[0016] Furthermore,

[0017] The vertical valve shaft is penetrated and matched with the sealing end cover, and the large-diameter shaft ring and the small-diameter top pressure sleeve are both slidably matched with the vertical valve shaft.

[0018] Furthermore,

[0019] The top ends of the two vertical support shafts are fixedly mounted with electric actuators, which are composed of a driving motor, a reducer and a hand wheel, wherein the power output shaft of the reducer is connected to the top end of the spherical valve core for transmission;

[0020] The active gear ring can be conveniently driven by positive and negative torsional rotation through the horizontal handle. The outer spherical surface of the spherical valve core is sealed with the two spherical oblique sections, which can block the two inlet and outlet pipes and close the ball valve. When the water hole follows the rotation of the spherical valve core and coincides with the inlet and outlet pipes, the two inlet and outlet pipes are opened and the ball valve is in an open state. The electric actuator is used to drive the spherical valve core by positive and negative torsional rotation of the vertical valve shaft to automatically open and close the ball valve.

[0021] Furthermore,

[0022] The spherical valve core is penetrated with a horizontally arranged water-through hole, and four arc-shaped installation grooves penetrating the water-through hole are symmetrically opened on both sides of the two ends of the water-through hole on the spherical valve core.

[0023] Furthermore,

[0024] Four arc-shaped scraper blades are symmetrically slidably installed on the four arc-shaped installation grooves, two horizontal sliding shafts are symmetrically welded on the upper and lower ends of the arc-shaped scraper blades, and the outer arc-shaped side of the arc-shaped scraper blade is an oblique cone tip structure.

[0025] Furthermore,

[0026] Two vertical supporting mounting rings are symmetrically welded at the upper and lower ends of the arc-shaped mounting groove, and two horizontal sliding shafts on the arc-shaped scraper blade are pushed by springs to slide through the two mounting rings.

[0027] Furthermore,

[0028] The arc-shaped scraper blades at the four locations respectively come into contact with the spherical oblique section structures at the ends of the two inlet and outlet water pipes when the spherical valve core rotates to open and close, so as to clean the impurities or scale attached to the spherical oblique section structures;

[0029] After the impurities or scale attached to the spherical oblique section structure are cleaned and removed, the spherical oblique section structure is smooth and regular, which can reduce the friction resistance between it and the spherical valve core, reduce the energy consumption required for twisting the spherical valve core to drive the ball valve, and also avoid the impurities or scale attached and accumulated protruding between the spherical oblique section structure and the outer spherical surface of the spherical valve core to form a leakage gap, affecting the blocking sealing effect of the spherical valve core, and ensuring the sealing performance of the ball valve when it is closed;

[0030] The arc scraper blade is installed by spring push-pushing. When it contacts the spherical oblique section structure, under the dual tilting guidance of the oblique section cone tip structure and the spherical oblique section structure, the springs on the two horizontal sliding shafts can be compressed and pushed inward to shrink in the arc installation groove, so as to avoid being protruded from the outside of the spherical valve core for a long time and causing obstacles to the torsion opening and closing of the spherical valve core. When the arc scraper blade is pushed inward to shrink in the arc installation groove, the springs on the two horizontal sliding shafts compressed by it can push it back against the spherical oblique section structure, so as to implement normal and effective sliding and scraping cleaning of the spherical oblique section structure.

[0031] The four arc-shaped scraper blades and the four arc-shaped mounting grooves are far away from the part of the spherical valve core that is used to fit and seal with the spherical oblique section structure. This can prevent the four arc-shaped mounting grooves from being twisted and driven to one end opening of the two inlet and outlet pipes inside the spherical valve cavity when the spherical valve core is twisted to close the ball valve, causing the conveying medium entering the valve body to leak through the four arc-shaped mounting grooves, thereby affecting the closing and sealing performance of the spherical valve core on the ball valve.

[0032] The invention provides a large flow ball valve with upper sealing function, which has the following beneficial effects:

[0033] 1. Through the power transmission of two conical driven gears and two crank slider mechanisms, the present invention only needs to exert force to rotate the active gear ring forward and backward, which is a simple action, to drive the packing seal to slide up and down at one time to tighten or loosen, and slide up and open at one time to replace the packing. Compared with the existing technology that uses multiple threaded components evenly arranged to tighten the packing seal, this can save the trouble of twisting multiple threaded components forward and backward in turn for multiple turns when tightening or replacing the packing, which helps to improve the tightening and replacement efficiency of the packing.

[0034] 2. The four arc-shaped scraper blades follow the spherical valve core to rotate and open and close, and respectively come into sliding contact with the spherical oblique-section structures at the two ends of the inlet and outlet water pipes, so as to clean the impurities or scale attached to the spherical oblique-section structure; after the impurities or scale attached to the spherical oblique-section structure are cleaned and removed, the spherical oblique-section structure presents a smooth and regular state, which can reduce the friction resistance between it and the spherical valve core, and reduce the energy consumption required for twisting the spherical valve core to drive the ball valve, and can also avoid the attached and accumulated impurities or scale protruding and supporting between the spherical oblique-section structure and the outer spherical surface of the spherical valve core, forming a leakage gap, affecting the blocking sealing effect of the spherical valve core, and ensuring the sealing performance of the ball valve when it is closed.

[0035] 3. The arc-shaped scraper blade is installed by spring push-pushing. When it is in contact with the spherical oblique-section structure, under the dual inclined guidance of the oblique cone tip structure and the spherical oblique-section structure, the springs on its two horizontal sliding shafts can be compressed and pushed inward to slide and shrink in the arc-shaped installation groove, so as to avoid long-term static protrusion on the outside of the spherical valve core, which would cause obstruction to the torsional opening and closing of the spherical valve core; and when the arc-shaped scraper blade is pushed inward to slide and shrink in the arc-shaped installation groove, the springs on the two horizontal sliding shafts compressed by it can push it back against the spherical oblique-section structure, so as to implement normal and effective sliding and scraping cleaning of the spherical oblique-section structure.

[0036] Fourth, the four arc-shaped scraper blades and the four arc-shaped mounting grooves are away from the part of the spherical valve core that is used to fit and seal with the spherical oblique section structure. This can prevent the four arc-shaped mounting grooves from being twisted and driven to one end opening of the two inlet and outlet pipes inside the spherical valve cavity when the spherical valve core is twisted to close the ball valve, causing the conveying medium entering the valve body to leak through the four arc-shaped mounting grooves, affecting the closing and sealing performance of the spherical valve core on the ball valve.

[0037] 5. The outer spherical surface of the spherical valve core 6 and the spherical oblique section structure of the end of the inlet and outlet water pipe 101 fit and seal, ensuring the effective blocking of the water flow channel. At the same time, the small diameter top pressure sleeve and the annular installation sleeve 1021 cooperate to implement top pressure sealing on the packing 7, further enhancing the overall sealing performance.

[0038] 6. The design of the arc scraper blade 603 not only realizes the effective cleaning of the spherical oblique section structure, but also avoids the obstruction of the spherical valve core 6 due to long-term static state through the spring push mechanism, reduces unnecessary wear and tear, and prolongs the overall service life of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0040] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0041] In the attached picture:

[0042] Figure 1 The overall structural diagram of the present invention is shown;

[0043] Figure 2 The overall bottom side structural schematic diagram of the present invention is shown;

[0044] Figure 3 A schematic diagram of the inner side structure of a half-section of a valve body of the present invention is shown;

[0045] Figure 4 A schematic diagram showing a disassembled state of the spherical valve core of the present invention is shown;

[0046] Figure 5 A schematic diagram of the spherical valve core structure of the present invention is shown;

[0047] Figure 6 A schematic diagram of the inner side structure of a half-section of the annular mounting sleeve of the present invention is shown;

[0048] Figure 7 A schematic diagram showing a disassembled state of the packing seal of the present invention is shown;

[0049] Figure 8 A schematic diagram of the cut-away inner side of a spherical valve core of the present invention is shown;

[0050] Fig. 9 A schematic diagram of the bottom structure of the active gear ring of the present invention is shown.

[0051] List of reference numerals:

[0052] 1. Valve body; 101. Inlet and outlet pipes; 102. Sealing end cover; 1021. Annular mounting sleeve; 1022. Vertical support shaft; 103. Limiting ring;

[0053] 2. Electric actuator;

[0054] 3. Horizontal support threaded shaft; 301. Threaded ring; 302. Conical driven gear;

[0055] 4. Packing seal; 401. Slip ring; 402. Connecting rod;

[0056] 5. Driving gear ring; 501. Horizontal handlebar;

[0057] 6. Spherical valve core; 601. Vertical valve shaft; 602. Arc-shaped installation groove; 6021. Installation ring; 603. Arc-shaped scraper blade; 6031. Horizontal sliding shaft;

[0058] 7. Root packing. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0060] Please refer to Figures 1 to 9 ;

[0061] Embodiment 1:

[0062] The present invention proposes a large flow ball valve with upper sealing function, comprising: a valve body 1 and a packing 7, a sealing end cover 102 is fixedly installed on the top of the valve body 1, an annular mounting sleeve 1021 is welded at the center of the bottom end of the sealing end cover 102, and the annular mounting sleeve 1021 is used for embedding the packing 7;

[0063] Two vertical support shafts 1022 are symmetrically welded at the top of the circumferential outer edge of the sealing end cover 102, and the packing seal 4 is slidably installed on the two vertical support shafts 1022; the packing seal 4 is composed of a large-diameter shaft ring at the top and a small-diameter top pressure sleeve welded to the bottom side of the large-diameter shaft ring, wherein the small-diameter top pressure sleeve is slidably plugged and matched with the annular installation sleeve 1021 and abuts against the packing 7 to implement top pressure sealing on the packing 7;

[0064] The top parts of the two vertical support shafts 1022 are symmetrically penetrated and rotatably installed with two horizontal support threaded shafts 3, the tail end parts of the horizontal support threaded shafts 3 are fitted with a conical driven gear 302, and the threaded parts are screwed and fitted with a threaded ring 301; two connecting rods 402 are symmetrically rotatably connected between the two threaded rings 301 and the packing seal 4; two limiting rings 103 are welded and fitted together at upper and lower intervals on the parts of the two vertical support shafts 1022 located above the horizontal support threaded shaft 3, and a driving gear ring 5 is rotatably installed between the two limiting rings 103, and the driving gear ring 5 is meshed with the two conical driven gears 302 for transmission;

[0065] The two threaded rings 301, the two connecting rods 402 and the packing seal 4 are connected together to form two crank slider mechanisms. Through these two mechanisms, the two threaded rings 301 sliding toward each other can drive the packing seal 4 to slide up and down to implement compression sealing and force unloading and loosening of the packing 7; the two cross-bracing threaded shafts 3 can synchronously rotate forward and reverse to drive the two threaded rings 301 to slide toward each other, providing a tightening and loosening driving force for the packing seal 4 to slide up and down; through the two conical driven gears 302, the active gear ring 5 can rotate forward and reverse to engage and drive the two cross-bracing threaded shafts 3 to rotate forward and reverse synchronously, drive and control the packing seal 4 to slide up and down, implement a one-time tightening and loosening of the packing 7, and the two threaded rings 301 are synchronously driven to perform a large stroke away from the slide When the packing 7 is replaced, the packing seal 4 can be pulled and driven to slide up greatly, and the packing seal 4 can be pulled out and opened from the annular mounting sleeve 1021 at one time, and the packing 7 can be replaced. Then, through the power transmission of the two conical driven gears 302 and the two crank slider mechanisms, the present invention only needs to exert force to rotate the active gear ring 5 forward and reversely, which is a simple action, to drive the packing seal 4 to slide up and down at one time to tighten or loosen, and slide up greatly at one time to open the packing 7. Compared with the existing technology of using multiple threaded components evenly distributed to tighten and seal the packing seal 4, this can save the trouble of twisting multiple threaded components forward and reverse in turn for multiple turns when tightening or replacing the packing 7, which helps to improve the tightening and replacement efficiency of the packing 7.

[0066] Preferably,

[0067] A horizontal handlebar 501 is welded to the outer circumference of the active gear ring 5;

[0068] The horizontal handle 501 can be used to conveniently implement forward and reverse torsional driving on the active gear ring 5, which reduces the time and labor intensity of manual operation.

[0069] Preferably,

[0070] Two slip rings 401 are symmetrically welded to the outer circumference of the large diameter shaft ring. The two slip rings 401 are correspondingly slidably matched with the two vertical support shafts 1022, and the tail ends of the two connecting rods 402 are correspondingly rotatably connected with the two slip rings 401.

[0071] Preferably,

[0072] A spherical valve cavity is provided inside the valve body 1, and a spherical valve core 6 is rotatably installed inside the spherical valve cavity, and a vertical valve shaft 601 is welded to the top of the spherical valve core 6; two inlet and outlet water pipes 101 are symmetrically welded through the side wall of the spherical valve cavity, one of the two inlet and outlet water pipes 101 is used for water inlet and the other for water outlet, and the ends of the two inlet and outlet water pipes 101 located inside the spherical valve cavity are both spherical oblique section structures, and the outer spherical surface of the spherical valve core 6 is sealed with the two spherical oblique section structures;

[0073] The outer spherical surface of the spherical valve core 6 fits and seals with the two spherical oblique sections, which can block the two inlet and outlet water pipes 101 and close the ball valve; the outer spherical surface of the spherical valve core 6 fits and seals with the spherical oblique sections at the ends of the inlet and outlet water pipes 101, ensuring effective blocking of the water flow channel. At the same time, the small diameter top pressure sleeve and the annular mounting sleeve 1021 cooperate to implement top pressure sealing on the packing 7, further enhancing the overall sealing performance.

[0074] Preferably,

[0075] The vertical valve shaft 601 is penetrated and matched with the sealing end cover 102 , and the large-diameter shaft ring and the small-diameter top pressing sleeve are both slidably matched with the vertical valve shaft 601 .

[0076] Preferably,

[0077] The top ends of the two vertical support shafts 1022 are fixedly mounted with an electric actuator 2, which is composed of a drive motor, a reducer and a handwheel. The power output shaft of the reducer is connected to the top end of the spherical valve core 6 for transmission.

[0078] Based on the first embodiment, the second embodiment:

[0079] The spherical valve core 6 is provided with a horizontally arranged water-through hole, and the spherical valve core 6 is provided with four arc-shaped installation grooves 602 which are symmetrically provided on both sides of the two ends of the water-through hole and are connected with the water-through hole;

[0080] When the water hole follows the rotation of the spherical valve core 6 and overlaps with the inlet and outlet pipes 101, the two inlet and outlet pipes 101 are opened and the ball valve is in an open state; the electric actuator 2 is used to drive the spherical valve core 6 by twisting the vertical valve shaft 601 forward and backward to automatically open and close the ball valve, which ensures the rapid response and stable operation of the ball valve.

[0081] Preferably,

[0082] Four arc-shaped scraper blades 603 are symmetrically slidably installed on the four arc-shaped installation grooves 602. Two horizontal sliding shafts 6031 are symmetrically welded on the upper and lower ends of the arc-shaped scraper blade 603, and the outer arc-shaped side of the arc-shaped scraper blade 603 is an oblique cone-shaped structure.

[0083] Preferably,

[0084] Two vertical supporting mounting rings 6021 are symmetrically welded at the upper and lower ends of the arc-shaped mounting groove 602 , and two horizontal sliding shafts 6031 on the arc-shaped scraper blade 603 are pushed by springs to slide through and fit with the two mounting rings 6021 .

[0085] Preferably,

[0086] When the four arc-shaped scraper blades 603 follow the spherical valve core 6 to rotate and open and close, they respectively come into contact with the spherical oblique section structures at the ends of the two inlet and outlet water pipes 101 to clean the impurities or scale attached to the spherical oblique section structures;

[0087] After the impurities or scale attached to the spherical oblique section structure are cleaned and removed, the spherical oblique section structure is smooth and regular, which can reduce the friction resistance between it and the spherical valve core 6, reduce the energy consumption required for twisting the spherical valve core 6 to drive the ball valve, and can also avoid the impurities or scale attached and accumulated protruding and supporting between the spherical oblique section structure and the outer spherical surface of the spherical valve core 6, forming a water leakage gap, affecting the blocking sealing effect of the spherical valve core 6, and ensuring the sealing performance of the ball valve when it is closed;

[0088] The arc scraper blade 603 is installed by spring push-pushing. When it comes into contact with the spherical oblique section structure, under the dual inclined guidance of the oblique cone tip structure and the spherical oblique section structure, the springs on the two horizontal sliding shafts 6031 can be compressed and pushed inward to slide and shrink in the arc installation groove 602, so as to avoid protruding from the outside of the spherical valve core 6 due to long-term static state, thereby causing obstruction to the torsional opening and closing of the spherical valve core 6. When the arc scraper blade 603 is pushed inward to slide and shrink in the arc installation groove 602, the springs on the two horizontal sliding shafts 6031 compressed by it can push it back against the spherical oblique section structure, thereby performing normal and effective sliding and scraping cleaning on the spherical oblique section structure. The design of the arc scraper blade 603 not only realizes the effective cleaning of the spherical oblique section structure, but also avoids the obstruction of the spherical valve core 6 due to long-term static state through the spring push-pushing mechanism, thereby reducing unnecessary wear and extending the overall service life of the ball valve.

[0089] The four arc-shaped scraper blades 603 and the four arc-shaped mounting grooves 602 are far away from the part of the spherical valve core 6 that is used to fit and seal with the spherical oblique section structure. This can prevent the four arc-shaped mounting grooves 602 from being twisted and driven to one end opening of the two inlet and outlet water pipes 101 inside the spherical valve cavity when the spherical valve core 6 is twisted to close the ball valve, causing the conveying medium entering the valve body 1 to leak through the four arc-shaped mounting grooves 602, thereby affecting the closing and sealing performance of the spherical valve core 6 on the ball valve.

[0090] The working principle of this embodiment is as follows: when in use, the ball valve is fixed in series on the oil pipeline as a whole, the small-diameter top pressure sleeve and the annular installation sleeve 1021 are inserted and matched with each other and abut against the packing 7 to implement top pressure sealing on the packing 7, and the outer spherical surface of the spherical valve core 6 is sealed with the two spherical oblique sections, which can block the two inlet and outlet pipes 101 and close the ball valve. When the water hole rotates with the spherical valve core 6 and overlaps and connects with the inlet and outlet pipes 101, the two inlet and outlet pipes 101 are opened, and the ball valve is in an open state. The electric actuator 2 is used to drive the spherical valve core 6 by rotating the valve shaft 601 forward and backward to automatically open and close the ball valve.

[0091] The two threaded rings 301, the two connecting rods 402 and the packing seal 4 are connected together to form two crank slider mechanisms. Through these two mechanisms, the two threaded rings 301 sliding toward each other can drive the packing seal 4 to slide up and down to implement compression sealing and force release and loosening of the packing 7; the two cross-bracing threaded shafts 3 can synchronously rotate forward and reverse to drive the two threaded rings 301 to slide toward each other, providing a tightening and loosening driving force for the up and down sliding of the packing seal 4; through the two conical driven gears 302, the active The gear ring 5 can rotate forward and reverse to mesh and drive the two cross-bracing threaded shafts 3 to rotate forward and reverse synchronously, drive and control the packing seal 4 to slide up and down, and implement one-time tightening and loosening of the packing 7. When the two threaded rings 301 are synchronously driven to slide away with a large stroke, the packing seal 4 can be pulled and driven to slide up greatly, and the packing seal 4 can be pulled out and opened from the annular mounting sleeve 1021 at one time, and the packing 7 can be replaced. The active gear ring 5 can be conveniently driven forward and backward by the horizontal handle 501.

[0092] When the arc scraper blades 603 follow the spherical valve core 6 to rotate and open and close, they are respectively in sliding contact with the spherical oblique-section structures at the two ends of the inlet and outlet water pipes 101, so as to clean the impurities or scale attached to the spherical oblique-section structure. The arc scraper blade 603 is installed by spring push-pushing. When it is in contact with the spherical oblique-section structure, under the dual inclined guidance of the oblique cone tip structure and the spherical oblique-section structure, the springs on the two horizontal sliding shafts 6031 can be compressed and pushed inward and slid and contracted in the arc installation groove 602, so as to avoid being protruded from the outside of the spherical valve core 6 for a long time and causing obstacles to the torsional opening and closing of the spherical valve core 6. When the arc scraper blade 603 is pushed inward and slid and contracted in the arc installation groove 602, the springs on the two horizontal sliding shafts 6031 compressed by it can push it back against the spherical oblique-section structure, so as to implement normal and effective sliding and scraping cleaning on the spherical oblique-section structure.

[0093] The four arc-shaped scraper blades 603 and the four arc-shaped mounting grooves 602 are far away from the part of the spherical valve core 6 that is used to fit and seal with the spherical oblique section structure. This can prevent the four arc-shaped mounting grooves 602 from being twisted and driven to one end opening of the two inlet and outlet water pipes 101 inside the spherical valve cavity when the spherical valve core 6 is twisted to close the ball valve, causing the conveying medium entering the valve body 1 to leak through the four arc-shaped mounting grooves 602, thereby affecting the closing and sealing performance of the spherical valve core 6 on the ball valve.

[0094] In this article, there are a few points to note:

[0095] 1. The drawings of the embodiments of the present invention only involve structures related to the embodiments of the present invention, and other structures can refer to the general design.

[0096] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0097] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A large flow ball valve with upper sealing function, comprising: A valve body (1) and a packing (7), wherein a sealing end cover (102) is fixedly mounted on the top end of the valve body (1), an annular mounting sleeve (1021) is welded at the center position of the bottom end of the sealing end cover (102), and the annular mounting sleeve (1021) is used for embedding the packing (7); The invention is characterized in that two vertical support shafts (1022) are symmetrically welded at the top of the circumferential outer edge of the sealing end cover (102), and a packing seal (4) is slidably installed on the two vertical support shafts (1022); the packing seal (4) is composed of a large-diameter shaft ring at the top and a small-diameter top pressure sleeve welded to the bottom side of the large-diameter shaft ring, wherein the small-diameter top pressure sleeve is inserted and matched with the annular installation sleeve (1021) and is in contact with the packing (7) to implement top pressure sealing on the packing (7); Two cross-bracing threaded shafts (3) are symmetrically penetrated and rotatably mounted on the top end portions of the two vertical support shafts (1022); a conical driven gear (302) is fixedly mounted on the tail end portions of the cross-bracing threaded shafts (3); and a threaded ring (301) is screwed and mounted on the threaded portion; two connecting rods (402) are symmetrically rotatably connected between the two threaded rings (301) and the packing seal (4); two limiting rings (103) are welded and mounted on the portions of the two vertical support shafts (1022) above the cross-bracing threaded shafts (3) at intervals in an upper and lower manner; a driving gear ring (5) is rotatably mounted between the two limiting rings (103), and the driving gear ring (5) is meshed and transmitted with the two conical driven gears (302).

2. A large flow ball valve with upper sealing function according to claim 1, characterized in that: A horizontal handlebar (501) is welded to the outer circumference of the active gear ring (5).

3. A large flow ball valve with upper sealing function according to claim 1, characterized in that: Two slip rings (401) are symmetrically welded to the outer circumference of the large diameter shaft ring. The two slip rings (401) are correspondingly slidably matched with the two vertical support shafts (1022), and the tail ends of the two connecting rods (402) are correspondingly rotatably connected with the two slip rings (401).

4. A large flow ball valve with upper sealing function according to claim 1, characterized in that: The valve body (1) has a spherical valve cavity formed inside, a spherical valve core (6) is rotatably mounted inside the spherical valve cavity, and a vertical valve shaft (601) is welded to the top of the spherical valve core (6); Two water inlet and outlet pipes (101) are symmetrically welded through the side wall of the spherical valve cavity, one of the two water inlet and outlet pipes (101) is used for water inlet and the other for water outlet, and one end of the two water inlet and outlet pipes (101) located inside the spherical valve cavity is a spherical oblique section structure, and the outer spherical surface of the spherical valve core (6) is tightly sealed with the two spherical oblique section structures.

5. A large flow ball valve with upper sealing function according to claim 4, characterized in that: The vertical valve shaft (601) is penetrated and matched with the sealing end cover (102), and the large-diameter shaft ring and the small-diameter top pressure sleeve are both slidably matched with the vertical valve shaft (601).

6. A large flow ball valve with upper sealing function according to claim 4, characterized in that: The top ends of the two vertical support shafts (1022) are fixedly mounted with an electric actuator (2), which is composed of a drive motor, a reducer and a hand wheel, wherein the power output shaft of the reducer is connected to the top end of the spherical valve core (6) for transmission.

7. A large flow ball valve with upper sealing function according to claim 4, characterized in that: The spherical valve core (6) is provided with a horizontally arranged water through hole, and the spherical valve core (6) is provided with four arc-shaped installation grooves (602) symmetrically arranged on both sides of the two ends of the water through hole and communicating with the water through hole.

8. A large flow ball valve with upper sealing function according to claim 7, characterized in that: Four arc-shaped scraper blades (603) are symmetrically slidably installed on the four arc-shaped installation grooves (602), two horizontal sliding shafts (6031) are symmetrically welded on the upper and lower ends of the arc-shaped scraper blade (603), and the outer arc-shaped side of the arc-shaped scraper blade (603) is an oblique cone tip structure.

9. A large flow ball valve with upper sealing function according to claim 8, characterized in that: Two vertical supporting mounting rings (6021) are symmetrically welded at the upper and lower ends of the arc-shaped mounting groove (602), and two horizontal sliding shafts (6031) on the arc-shaped scraper blade (603) are pushed by springs to slide through and fit with the two mounting rings (6021).

10. A large flow ball valve with upper sealing function according to claim 8, characterized in that: The arc-shaped scraper blades (603) at the four locations respectively come into sliding contact with the spherical oblique-section structures at the ends of the two inlet and outlet water pipes (101) when the spherical valve core (6) rotates to open and close, so as to clean impurities or scale attached to the spherical oblique-section structures.

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