Ball valve with valve element convenient to replace

Abstract

The ball valve comprises a valve body, a valve cover is connected to the top of the valve body in an inserted mode, a rotating shaft is arranged on the inner wall of the valve cover, the spherical valve element is arranged in the valve body, a fixing groove is formed in the top of the spherical valve element, and a valve rod is connected to the inner wall of the fixing groove in an inserted mode. According to the ball valve with the valve element convenient to replace, through cooperation of the first bolt, the movable rod, the first spring, the fixed rod and the second spring, the spherical valve element of the ball valve can be rapidly replaced, and the problems that in actual use, the valve element of the ball valve is always scoured by media for a long time and is under scouring friction for a long time, and the service life of the ball valve is prolonged are solved. The problems that the surface of a valve element may be seriously abraded, a worker needs to replace an old valve element with a new valve element, and the valve elements installed at some special positions are not easy to replace, so that the ball valve cannot be quickly recovered for use, and production is seriously affected are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve technical field, concretely is a ball valve of convenient replacement of valve core. BACKGROUND

[0002] Ball valve, open and close piece is driven by valve stem, and the valve door that rotates movement is made around ball valve axis, can be used for the adjustment and control of fluid.

[0003] Traditional ball valve when using, the staff installs ball valve to the pipe of two need intercommunication, through the rotation of ball valve core, to reach the purpose that medium is in the pipe inside circulation.

[0004] But in actual use, the valve core of ball valve has been subjected to medium scouring for a long time, under the scouring and friction for a long time, the valve core surface can appear serious wear, the staff needs to replace the old valve core with new valve core, the valve core installed in some special position is not easy to replace, lead to ball valve can not quickly restore use, thereby the serious influence to production is caused. UTILITY MODEL CONTENTS

[0005] In view of the deficiency of prior art, the utility model provides a ball valve of convenient replacement of valve core, solve the problem that in actual use, the valve core of ball valve has been subjected to medium scouring for a long time, under the scouring and friction for a long time, the valve core surface can appear serious wear, the staff needs to replace the old valve core with new valve core, the valve core installed in some special position is not easy to replace, lead to ball valve can not quickly restore use, thereby the serious influence to production is caused.

[0006] To realize the above-mentioned purpose, the utility model realizes through following technical scheme: a ball valve of convenient replacement of valve core, including valve body, the top of valve body is inserted with valve cover, the inner wall of valve cover is provided with rotating shaft, the inside of valve body is provided with spherical valve core, the top of spherical valve core is provided with fixed slot, the inner wall of fixed slot is inserted with valve stem, the ball valve of convenient replacement of valve core still includes fixing device, and the fixing device is arranged in the inside of valve stem;Locking device is arranged at the top of valve cover;Sealing device is arranged above valve cover;Wherein, through fixing device, the spherical valve core is realized fast replacement, locking device is fast fixed between valve body and valve cover, and sealing device realizes sealing at the top of valve cover.

[0007] Preferably, the valve stem is provided with threaded grooves on both sides, and a load groove is formed in the interior of the valve stem; the fixing device comprises two first bolts, which are respectively connected to the inner walls of the two threaded grooves; the movable rod is movably connected to the inner wall of the load groove, and the top of the movable rod is attached to the ends of the two first bolts; the first spring is sleeved at the bottom of the movable rod, and the end thereof is fixedly connected to the bottom of the inner wall of the load groove; the fixing rod is provided with two, which are respectively attached to the two sides of the bottom of the movable rod, and the ends thereof respectively penetrate through the outer walls of the valve stem and extend into the grooves on the two sides of the inner wall of the fixed groove; the second spring is provided with two, which are respectively sleeved on the outer walls of the two fixing rods, and the ends thereof are respectively fixedly connected to the two sides of the inner wall of the load groove; wherein the first bolt drives the movable rod to move, and the movable rod, the fixing rod and the second spring cooperate to fix the spherical valve core at the bottom of the valve stem, and the first spring limits the movement of the movable rod.

[0008] Preferably, four limiting grooves are formed in the outer wall of the valve cover, and a set of locking devices comprises a locking block arranged in the limiting groove; the locking seat is fixedly connected to the top of the locking block; the second bolt is rotatably connected to the top of the locking seat through a sealing bearing; the connecting rod is arranged on one side of the outer wall of the valve cover; the locking plate is provided with two, which are respectively fixedly connected to the top and bottom of the connecting rod, and the locking plate located at the top is threadedly connected to the outer wall of the second bolt, and the locking plate located at the bottom is attached to the lower part of the outer wall of the valve body; wherein the second bolt and the locking plate located at the top of the connecting rod cooperate to move the locking seat and the locking block into the limiting groove, and the locking plate located below the valve body fixes the valve body and the valve cover together.

[0009] Preferably, a connecting groove is formed in the top of the valve stem, the bottom of the rotating shaft is clamped to the outer wall of the connecting groove, the top of the rotating shaft is fixedly connected with a rotating seat, and the outer wall of the rotating seat is provided with a rotating wheel.

[0010] Preferably, the sealing device comprises a pressing plate sleeved on the outer wall of the rotating shaft; the pressing cover is attached to the bottom of the pressing plate, and the inner wall thereof is sleeved on the outer wall of the rotating shaft; the packing is arranged below the pressing cover and between the valve cover and the rotating shaft; the third bolt is provided with four, penetrates through the pressing plate and is threadedly connected to the inner wall of the valve cover; wherein the packing seals the valve cover and the rotating shaft, and the cooperation of the third bolt, the pressing plate and the pressing cover fixes the packing between the valve cover and the rotating shaft.

[0011] Preferably, the outer walls of the spherical valve core are provided with valve seats on both sides, the tops of the two valve seats are respectively fixedly connected to the two sides of the bottom of the valve cover, and the bottoms of the two valve seats are respectively abutted against the bottom of the inner wall of the valve body. Advantages

[0012] The utility model provides a ball valve of convenient replacement of valve core. Have the following beneficial effect: this ball valve of convenient replacement of valve core, through the cooperation of first bolt, movable rod, first spring, fixed rod and second spring, realized quick replacement of the spherical valve core of ball valve, solved the problem that the valve core of ball valve has been subjected to medium scouring for a long time in actual use, under long -time scouring and friction, the valve core surface can appear serious wear, the staff needs to replace the old valve core with new valve core, the valve core installed in some special position is not easy to replace, lead to ball valve can't quick recovery use, thereby the serious influence problem to production.

[0013] Through the cooperation of locking block, locking seat, second bolt, connecting rod and locking plate, realize quick and convenient installation of valve cover and valve body together, solve the problem that the valve cover and valve body need to be fixed through a plurality of bolts, and each bolt needs to completely penetrate the connecting place of valve cover and valve cover, and be locked through the threaded cap when the traditional ball valve is used. ACCURACY OF DRAWINGS

[0014] Figure 1 It is the structure schematic view of the utility model;

[0015] Figure 2 It is the appearance schematic view of the utility model;

[0016] Figure 3 It is the internal structure schematic view of valve rod;

[0017] Figure 4 It is Figure 1 The structure schematic view of first bolt, movable rod and first spring in it;

[0018] Figure 5 It is Figure 1 The structure schematic view of locking block, locking seat and locking plate in it;

[0019] Figure 6 It is Figure 4 The structure schematic view of spherical valve core, fixed groove and valve rod in it.

[0020] In the drawing: 1, valve body; 2, valve cover; 21, limit slot; 3, spherical valve core; 31, fixed groove; 32, valve seat; 4, valve rod; 41, connecting groove; 42, threaded groove; 43, load groove; 5, fixing device; 51, first bolt; 52, movable rod; 53, first spring; 54, fixed rod; 55, second spring; 6, rotating shaft; 61, rotating seat; 62, rotating wheel; 7, locking device; 71, locking block; 72, locking seat; 73, second bolt; 74, locking plate; 75, connecting rod; 8, sealing device; 81, pressing plate; 82, gland; 83, packing; 84, third bolt. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0022] In actual use, the valve core of the ball valve has been subjected to medium scouring for a long time. Under the scouring and friction for a long time, the surface of the valve core can be seriously worn. The staff needs to replace the old valve core with a new one. The valve core installed in some special positions is not easy to replace, which leads to the ball valve being unable to be quickly restored for use, thereby seriously affecting production.

[0023] Therefore, the utility model provides a ball valve convenient to replace valve core, solves the problem that in actual use, the valve core of the ball valve has been subjected to medium scouring for a long time. Under the scouring and friction for a long time, the surface of the valve core can be seriously worn. The staff needs to replace the old valve core with a new one. The valve core installed in some special positions is not easy to replace, which leads to the ball valve being unable to be quickly restored for use, thereby seriously affecting production.

[0024] Through the personnel in the art, the parts in the case are connected in turn, and the specific connection and operation sequence should be referred to the following working principle, and the detailed connection means is the public technical knowledge in the art, and the following mainly introduces the working principle and process.

[0025] Embodiment one: by Figures 1-6 It can be known that the ball valve convenient to replace valve core includes valve body 1, the top of valve body 1 is connected with valve cover 2, the inner wall of valve cover 2 is provided with rotating shaft 6, the inside of valve body 1 is provided with spherical valve core 3, the top of spherical valve core 3 is provided with fixed groove 31, the inner wall of fixed groove 31 is connected with valve rod 4, the ball valve convenient to replace valve core further includes fixing device 5, locking device 7 and sealing device 8, fixing device 5 is arranged in the inside of valve rod 4, locking device 7 is arranged on the top of valve cover 2, sealing device 8 is arranged above valve cover 2, wherein, fixing device 5 is used to realize the quick replacement of spherical valve core 3, locking device 7 is used to quickly fix between valve body 1 and valve cover 2, and sealing device 8 is used to realize the sealing of the top of valve cover 2.

[0026] In the implementation process, it is worth pointing out that the top of the valve body 1 is provided with an opening, which is convenient for installation with the valve cover 2, and the two sides of the valve body 1 are respectively provided with a plurality of through holes for connecting with external pipelines or flanges. It can be understood that the inner wall of the valve body 1 is provided with a corrosion-resistant layer, and the material of the corrosion-resistant layer can be selected according to actual needs, for example, it can be polytetrafluoroethylene material. The material of the valve body 1 is usually selected according to the use environment and the characteristics of the medium, for example, in the pipeline conveying corrosive medium, a valve body 1 made of stainless steel or corrosion-resistant alloy material can be selected to ensure its service life and safety. The valve cover 2 plays a role in closing the valve body 1 and protecting the internal components of the valve body 1. A sealing gasket is provided between the valve body 1 and the valve cover 2. It can be understood that the material of the sealing gasket can be selected to have excellent chemical stability and corrosion resistance, such as polytetrafluoroethylene material. The surface of the spherical valve core 3 is smooth, and the rotation of the spherical valve core 3 controls the on-off of the medium. The material of the spherical valve core 3 can be selected according to the properties of the medium. It can be understood that, for example, in a high temperature and high pressure environment, a high temperature resistant and high strength alloy material can be selected. The top fixing groove 31 of the spherical valve core 3 is in the shape of a cylinder, and square grooves are further formed on both sides. The square grooves can be used in cooperation with the fixing rods 54 inside the valve stem 4. The valve stem 4 is composed of two parts, and the two parts have the same shape. Two parallel threaded holes are formed in the upper outer wall of one part, and threaded holes corresponding to the threaded holes are directly formed in the upper outer wall of the other part. The remaining internal structures are identical. The two parts of the valve stem 4 are fixed by two screws. The fixing device 5 can fix the valve stem 4 and the spherical valve core 3, and the spherical valve core 3 can be quickly replaced through the fixing device 5. The locking device 7 quickly fixes the valve body 1 and the valve cover 2. The sealing device 8 seals the top of the valve cover 2.

[0027] Further, threaded grooves 42 are formed on both sides of the valve stem 4, and a load groove 43 is formed in the inside of the valve stem 4. The fixing device 5 includes first bolts 51, movable rods 52, first springs 53, fixing rods 54 and second springs 55. The first bolts 51 are provided with two, respectively threaded connected to the inner wall of the two threaded grooves 42. The movable rods 52 are movably connected to the inner wall of the load groove 43, and the top is attached to the end of the two first bolts 51. The first spring 53 is sleeved on the bottom of the movable rod 52, and the end is fixedly connected to the bottom of the inner wall of the load groove 43. The fixing rods 54 are provided with two, respectively attached to the bottom of both sides of the movable rod 52, and the end respectively penetrates through the outer wall of the valve stem 4, and respectively extends to the recess inside the inner wall of both sides of the fixing groove 31. The second spring 55 is provided with two, respectively sleeved on the outer wall of the two fixing rods 54, and the end is respectively fixedly connected to the inner wall of both sides of the load groove 43. Among them, the first bolt 51 drives the movable rod 52 to move, and through the cooperation of the movable rod 52, the fixing rod 54 and the second spring 55, the spherical valve core 3 is fixed at the bottom of the valve stem 4. The first spring 53 limits the movement of the movable rod 52.

[0028] In the specific implementation process, it is worth noting that the connecting groove 41 at the top of the valve stem 4 is square, which works in conjunction with the square limiting block at the bottom of the rotating shaft 6 to achieve a fixed connection between the valve stem 4 and the rotating shaft 6. The threaded groove 42 inside the valve stem 4 is connected to the loading groove 43, and the two together form an "I" shape. Each part of the valve stem 4 has half of the connecting groove 41, half of the threaded groove 42, and half of the loading groove 43. The upper part of the loading groove 43 is machined into a cylindrical shape, and the lower part is machined into a quadrangular prism space. Two horizontally placed "convex" spaces are also machined on both sides of the quadrangular prism space, which finally penetrates the outer walls on both sides. Below the quadrangular prism space, there is also a small cylindrical space with the same diameter as the upper cylindrical space. It can be understood that during processing, the two parts of the valve stem 4 can be processed separately. The two first bolts 51 are set opposite each other, and the ends are fixed with a cylindrical head with a cone, which facilitates the cooperation with the top of the movable rod 52. The top of the movable rod 52 is set as The ball valve is hemispherical with a cylindrical middle section. The bottom of the cylinder is machined into a trapezoidal prism, and the bottom of the prism is also cylindrical. The overall shape is a cross. The first spring 53 and the second spring 55 are both made of carbon spring steel. The elastic coefficient of both is selected according to actual needs to meet the working requirements. There are two second springs 55. The fixed rod 54 is horizontally shaped like an umbrella. The larger end has a spherical surface to facilitate its use with the bottom slope of the movable rod 52. The smaller end is cylindrical and the outer wall is fitted with the second spring 55. The larger end is used in conjunction with the second spring 55. It is understood that in high temperature and high pressure environments, high temperature and high strength alloy materials may be selected. Through the cooperation of the first bolt 51, the movable rod 52, the first spring 53, the fixed rod 54 and the second spring 55, the purpose of quickly replacing the ball valve core 3 of the ball valve is achieved, thereby improving the convenience of replacing the valve core.

[0029] Furthermore, the outer wall of the valve cover 2 is provided with four limiting grooves 21, and a locking device 7 includes a locking block 71, a locking seat 72, a second bolt 73, a locking plate 74, and a connecting rod 75. The locking block 71 is disposed inside the limiting groove 21; the locking seat 72 is fixedly connected to the top of the locking block 71; the second bolt 73 is rotatably connected to the top of the locking seat 72 through a sealed bearing; the connecting rod 75 is disposed on one side of the outer wall of the valve cover 2; two locking plates 74 are provided, which are fixedly connected to the top and bottom of the connecting rod 75 respectively, and the locking plate 74 located at the top is threadedly connected to the outer wall of the second bolt 73, and the locking plate 74 located at the bottom is attached to the lower part of the outer wall of the valve body 1; wherein, through the cooperation of the second bolt 73 and the locking plate 74 located at the top of the connecting rod 75, the locking seat 72 drives the locking block 71 to move into the limiting groove 21, and the locking plate 74 located below the valve body 1 fixes the valve body 1 and the valve cover 2 together;

[0030] In the implementation process, it is worth pointing out that the overall limit groove 21 is a four-prism, the locking device 7 is provided with four groups, the locking block 71 is provided with four, the overall is a four-prism, the locking seat 72 is a circular table, the top is provided with a bearing groove that can install a sealed bearing, the bottom is provided with a rubber pad, which increases the friction, the second bolt 73 is provided with four, the top is provided with an auxiliary rod that can be rotated by hand, a set of locking plates 74 is provided with two, the top is provided with a thread, the bottom is also provided with a rubber pad, which increases the friction, through the cooperation of the locking block 71, the locking seat 72, the second bolt 73, the connecting rod 74 and the locking plate 75, the valve cover 2 and the valve body 1 are installed together quickly and conveniently, and the installation convenience of the ball valve is improved.

[0031] Specifically, when the spherical valve core 3 of the ball valve needs to be replaced, first, the staff rotates the second bolt 73 counterclockwise, the second bolt 73 drives the locking seat 72 to rise through the sealed bearing, the locking seat 72 drives the locking block 71 to rise, until the locking block 71 leaves the limit groove 21 of the outer wall of the valve cover 2, at this time, remove a set of locking devices 7, the operation process of the remaining three sets of locking devices 7 is the same, after removing all the locking devices 7, it can be understood that when fixing the valve cover 2 and the valve body 1 again, reverse the above operation, the staff lifts the valve cover 2 upward, the valve cover 2 drives the valve seat 32 to move upward, the valve seat 32 drives the internal spherical valve core 3 to move upward, until it leaves the inside of the valve body 1, then the staff counterclockwise rotates the fixing screw between the valve cover 2 and the valve seat 32, after the valve seat 32 is removed, the spherical valve core 3 is exposed, after that, the staff inserts two hex wrenches into the inside of the first bolt 51 respectively, rotates the first bolt 51 counterclockwise, as the first bolt 51 rotates, the pressure of the first bolt 51 on the movable rod 52 weakens, then the compressed first spring 53 at the bottom of the movable rod 52 rebounds, the first spring 53 drives the movable rod 52 to rise, after the movable rod 52 rises, the pressure on the fixed rod 54 on both sides weakens, the second spring 55 sleeved on the outer wall of the fixed rod 54 rebounds, respectively drives the two fixed rods 54 to move into the load slot 43, so that the fixed rod 54 leaves the square groove on both sides of the top fixed groove 31 of the spherical valve core 3, at this time, the staff disconnects the connection between the valve stem 4 and the spherical valve core 3, replaces the damaged spherical valve core 3, after taking a new spherical valve core 3, reverses the above operation, installs the new spherical valve core 3 to the bottom of the valve stem 4, and re-installs the valve seat 32 between the valve cover 2 and the spherical valve core 3, then places the valve cover 2 on the top of the valve body 1 again, and fixes it through the locking device 7.

[0032] Example two: from Figures 1-6It can be known that the top of the valve rod 4 is provided with a connecting groove 41, the bottom of the rotating shaft 6 is clamped to the outer wall of the connecting groove 41, the top of the rotating shaft 6 is fixedly connected with a rotating seat 61, and the outer wall of the rotating seat 61 is installed with a rotating wheel 62;

[0033] In the specific implementation process, it is worth pointing out that the connecting groove 41 is in a whole 'convex' shape, the bottom is a square, the bottom of the rotating shaft 6 is provided with a limiting block corresponding to the shape of the connecting groove 41, the outer wall of the bottom of the rotating shaft 6 is provided with a gasket, the gasket plays a sealing, protection, buffering and adjusting role for the ball valve, the top of the rotating seat 61 is a quadrangular prism, and the top of the rotating seat 61 is installed with a limiting cap to fix the rotating wheel 62, the staff cooperates with the rotating seat 61 and the rotating wheel 62 to achieve the purpose of on-off ball valve, and the use convenience of the ball valve with the valve core replaced conveniently is improved;

[0034] Further, the sealing device 8 includes a pressing plate 81, a pressing cover 82, a packing 83 and a third bolt 84, the pressing plate 81 is sleeved on the outer wall of the rotating shaft 6; the pressing cover 82 is attached to the bottom of the pressing plate 81, and the inner wall is sleeved on the outer wall of the rotating shaft 6; the packing 83 is located below the pressing cover 82 and is arranged between the valve cover 2 and the rotating shaft 6; the third bolt 84 is provided with four, penetrates the pressing plate 81 and is threadedly connected to the inner wall of the valve cover 2; wherein the packing 83 realizes sealing between the valve cover 2 and the rotating shaft 6, and the third bolt 84, the pressing plate 81 and the pressing cover 82 cooperate to fix the packing 83 between the valve cover 2 and the rotating shaft 6;

[0035] In the specific implementation process, it is worth pointing out that the pressing plate 81 is in a circular ring shape, which is used to apply pressure to the pressing cover 82, the pressing cover 82 is used to press the packing 83 between the valve cover 2 and the rotating shaft 6, the packing 83 plays a sealing role between the valve cover 2 and the rotating shaft 6, and the material of the packing 83 can be selected according to actual needs, for example, the material can be graphite material, the third bolt 84 is provided with four, the third bolt 84 is used to fix the pressing plate 81, and the cooperation of the above-mentioned parts realizes the sealing of the ball valve with the valve core replaced conveniently;

[0036] Further, the outer wall of the spherical valve core 3 is provided with valve seats 32 on both sides, the top of the two valve seats 32 is fixedly connected to the bottom of the valve cover 2 on both sides, and the bottom of the two valve seats 32 is tightly abutted to the inner wall bottom of the valve body 1;

[0037] In the implementation process, it is worth pointing out that the valve seat 32 is annular, and the top is fixed on the bottom of the valve cover 2 by bolts, two valve seats 32 are arranged on both sides of the spherical valve core 3, the inner walls of the two valve seats 32 are provided with sealing pads, the sealing pads are attached to the outer wall of the spherical valve core 3, and the material of the sealing pad can be selected according to actual needs, and the material of polytetrafluoroethylene can also be selected. By cooperation of the valve seat 32 and the spherical valve core 3, the inside of the ball valve can be sealed, the medium is prevented from leaking to other places inside the ball valve, and the service life of the ball valve with the valve core replaced conveniently is improved.

[0038] Specifically, first, the staff cooperates the rotating seat 61 with the rotating wheel 62 to achieve the purpose of on-off ball valve, realizes the convenience of the ball valve with the valve core replaced conveniently, second, the third bolt 84 is tightened, the pressing plate 81 is pressed downward to the gland 82, so that the packing 83 is fixed between the valve cover 2 and the rotating shaft 6, the sealing effect is enhanced, the cooperation of the above-mentioned parts realizes the sealing of the ball valve with the valve core replaced conveniently, finally, the cooperation of the valve seat 32 and the spherical valve core 3 can seal the inside of the ball valve, prevent the medium from leaking to other places inside the ball valve, and improve the service life of the ball valve with the valve core replaced conveniently.

[0039] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is limited by the appended claims and its equivalents.

Claims

1. A ball valve with a cartridge that is easy to replace, comprising a valve body (1), characterized in that: The top of the valve body (1) is inserted with a valve cover (2), the inner wall of the valve cover (2) is provided with a rotating shaft (6), the inside of the valve body (1) is provided with a spherical valve core (3), the top of the spherical valve core (3) is provided with a fixed groove (31), the inside of the fixed groove (31) is inserted with a valve rod (4), the both sides of the valve rod (4) are provided with threaded grooves (42), the inside of the valve rod (4) is provided with a load groove (43), and the ball valve with the ball valve core convenient to replace further comprises: A fixing device (5) is arranged in the inside of the valve rod (4); A locking device (7) is arranged at the top of the valve cover (2); A sealing device (8) is arranged above the valve cover (2); Wherein, the fixing device (5) realizes quick replacement of the spherical valve core (3), the locking device (7) quickly fixes the valve body (1) and the valve cover (2), and the sealing device (8) realizes sealing of the top of the valve cover (2); The fixing device (5) comprises: Two first bolts (51) are arranged and are threadedly connected to the inner walls of the two threaded grooves (42); A movable rod (52) is movably connected to the inner wall of the load groove (43) and is attached to the ends of the two first bolts (51) at the top; A first spring (53) is sleeved at the bottom of the movable rod (52) and is fixedly connected to the bottom of the inner wall of the load groove (43) at the end; Two fixed rods (54) are arranged and are attached to the bottoms of the two sides of the movable rod (52) at the ends and extend to the recesses in the inner walls of the two sides of the fixed groove (31) through the outer walls of the two sides of the valve rod (4); Two second springs (55) are arranged and are sleeved at the outer walls of the two fixed rods (54) at the ends and are fixedly connected to the two sides of the inner wall of the load groove (43); Wherein, the first bolt (51) drives the movable rod (52) to move, the spherical valve core (3) is fixed at the bottom of the valve rod (4) through the cooperation of the movable rod (52), the fixed rod (54) and the second spring (55), and the first spring (53) limits the movement of the movable rod (52).

2. A ball valve with a conveniently replaceable valve core according to claim 1, characterized in that: Four limiting grooves (21) are formed in the outer wall of the valve cover (2), and one set of the locking device (7) comprises: A locking block (71) is arranged in the limiting groove (21); A locking seat (72) is fixedly connected to the top of the locking block (71); A second bolt (73) is rotatably connected to the top of the locking seat (72) through a sealing bearing; A connecting rod (75) is arranged on one side of the outer wall of the valve cover (2); Two locking plates (74) are arranged and are fixedly connected to the top and the bottom of the connecting rod (75), and the locking plate (74) located at the top is threadedly connected to the outer wall of the second bolt (73), and the locking plate (74) located at the bottom is attached to the lower side of the outer wall of the valve body (1). The second bolt (73) and the locking plate (74) at the top of the connecting rod (75) cooperate to drive the locking block (71) to move to the inside of the limiting groove (21), and the locking plate (74) below the valve body (1) is used to fix the valve body (1) and the valve cover (2) together.

3. A ball valve with a conveniently replaceable valve core according to claim 1, characterized in that: The top of the valve rod (4) is provided with a connecting groove (41), the bottom of the rotating shaft (6) is clamped to the outer wall of the connecting groove (41), the top of the rotating shaft (6) is fixedly connected with a rotating seat (61), and the outer wall of the rotating seat (61) is installed with a rotating wheel (62).

4. A ball valve with a conveniently replaceable valve core according to claim 3, characterized in that: The sealing device (8) comprises: A pressing plate (81) is sleeved on the outer wall of the rotating shaft (6); A pressing cover (82) is attached to the bottom of the pressing plate (81), and the inner wall is sleeved on the outer wall of the rotating shaft (6); A packing (83) is located below the pressing cover (82) and is arranged between the valve cover (2) and the rotating shaft (6); Four third bolts (84) are arranged, penetrating the pressing plate (81) and being threadedly connected to the inner wall of the valve cover (2); The packing (83) is arranged between the valve cover (2) and the rotating shaft (6), and the third bolt (84), the pressing plate (81) and the pressing cover (82) cooperate to fix the packing (83) between the valve cover (2) and the rotating shaft (6).

5. A ball valve with a conveniently replaceable valve core according to claim 4, characterized in that: The outer wall of the spherical valve core (3) is provided with a valve seat (32) on both sides, and the top of the two valve seats (32) is fixedly connected to the bottom of the valve cover (2) on both sides, and the bottom of the two valve seats (32) is abutted to the inner wall bottom of the valve body (1).

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