Ball valve

Abstract

The utility model provides a ball valve, and belongs to the technical field of valves. The problem of how to ensure that the manually adjusted flow is not easy to be randomly adjusted by other people is solved. The front end and the rear end of the valve body are a water inlet end and a water outlet end respectively, the ball core and the valve rod are arranged in the valve body, a sheet-shaped flow adjusting part is arranged in the water inlet end, a flow adjusting hole is formed in the flow adjusting part in a penetrating mode in the water inlet direction, and a columnar protection part is arranged at the upper end of the valve body and provided with a protection hole penetrating through the upper end face of the protection part. The upper end of the valve rod extends into the protection hole, the upper end part of the valve rod is fixedly connected with a connecting block through an anti-disassembly screw, the outer side contour of the connecting block is non-circular, the upper end part of the connecting block is fixedly connected with a flow dial, the ball valve further comprises an operation sleeve with a sleeving hole, and the shape of the sleeving hole of the operation sleeve is the same as that of the outer side contour of the connecting block. The flow regulating valve has the advantages that the regulated flow is not easy to randomly regulate, the flow can be more accurately regulated, and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves and relates to a ball valve. Background Art

[0002] A ball valve is a common valve that realizes opening, closing, and flow regulation through the rotation of a ball core. In daily use, there are no special requirements for flow regulation, as long as the flow can be increased or decreased. However, in some special environments, it is required that the flow can be linearly regulated, while the flow regulation of traditional ball valves is non-linear, so they are not applicable. For this reason, the conventional method is to set a flow regulation plate in the water inlet end of the valve body and set flow regulation holes along the water inlet direction on the flow regulation plate. When the ball core rotates, the linear regulation of the flow is realized by the coincidence of the water passing holes on the ball core and the flow regulation holes, and this structure has been widely applied to electric ball valves.

[0003] However, for electric valves, since the valve stem is connected to an electric actuator, its flow is adjusted by automatically controlling the valve stem by the electric actuator, and others cannot make changes after the adjustment. For manual valves, after manually adjusting the flow, since the handle is directly exposed, it is very easy for others to adjust it casually. Summary of the Utility Model

[0004] The purpose of the utility model is to address the above problems existing in the prior art and propose a ball valve, which solves the problem of how to ensure that the manually adjusted flow is not easily adjusted casually by others.

[0005] The purpose of the utility model can be achieved by the following technical solutions:

[0006] A ball valve includes a valve body with a water inlet end and a water outlet end at its front and rear ends respectively, and a ball core and a valve stem both arranged in the valve body. The lower end of the valve stem is connected to the ball core. The ball core is provided with a through water passing hole in the transverse direction. A sheet-like flow regulation part is arranged in the water inlet end, and the flow regulation part is provided with a flow regulation hole penetrating along the water inlet direction. The characteristic is that the upper end of the valve body has a columnar protection part, the protection part has a protection hole penetrating its upper end surface, the upper end of the valve stem extends into the protection hole, the upper end part of the valve stem is fixedly connected with a connection block through an anti-disassembly screw, the outer contour of the connection block is non-circular, the upper end part of the connection block is fixedly connected with a flow scale disk, and this ball valve further includes an operation sleeve with a socket hole, and the shape of the socket hole of the operation sleeve is the same as the shape of the outer contour of the connection block.

[0007] When the valve is in the closed state, the water passing hole of the ball core and the flow regulating hole of the flow regulating part are in a completely staggered state. When the valve needs to be opened, the user inserts the operating sleeve into the protection hole and sleevs it outside the connecting block through the socket hole. Since the shape of the socket hole is the same as the outer contour shape of the connecting block, when the user rotates the sleeve, the connecting block will be driven to rotate. The connecting block is fixedly connected to the valve stem and the valve stem is connected to the ball core. In this way, the ball core will rotate, so that the water passing hole and the flow regulating hole gradually coincide from being completely staggered. The overlapping part of the water passing hole and the flow regulating hole increases linearly as the rotation angle of the ball core increases, thereby realizing the linear regulation of the flow rate. After adjusting to the required flow rate, remove the operating sleeve. The user can directly understand the current flow rate from the flow rate scale to determine whether the flow rate is adjusted in place. Moreover, combined with the flow rate scale, the user can also adjust the flow rate more precisely.

[0008] Since the outer contour shape of the connecting block is non-circular, others cannot use other tools to sleeve outside the connecting block to operate it without the above-mentioned operating sleeve; in addition, the connecting block is located in the protection hole, which is equivalent to forming protection from the outside of the connecting block, so that others cannot directly use their hands or a wrench to rotate the connecting block. As a result, the set flow rate will not be adjusted randomly by others, ensuring the reliability of use. Moreover, the connecting block is fixedly connected to the valve stem with anti-disassembly screws, which makes it impossible for others to remove the anti-disassembly screws with a conventional screwdriver, thus eliminating the possibility of removing the connecting block and directly operating the valve stem.

[0009] In the above ball valve, the upper end of the valve stem has a flat-square-shaped connecting part, and the bottom of the connecting block has a flat-square hole that matches the connecting part. The flow rate scale is abutted against the connecting block, and the rod part of the anti-disassembly screw passes through the flow rate scale and the connecting block in sequence and is threadedly connected in the connecting part.

[0010] During assembly, the connecting block is sleeved on the flat-square-shaped connecting part at the upper end of the valve stem through the flat-square hole, then the flow rate scale is abutted against the connecting block, and then the anti-disassembly screw is screwed on, so that the connecting block and the valve stem are fixedly connected and the flow rate scale and the connecting block are fixedly connected. In this way, as long as the anti-disassembly screw is not removed, the flow rate scale and the connecting block cannot be removed.

[0011] In the above ball valve, the upper end of the connecting block has a circular concave pit and a notch communicating with the circular concave pit. The flow rate scale is circular, the flow rate scale is embedded in the circular concave pit, and the edge of the flow rate scale has a sheet-like protruding positioning part, and the positioning part is located in the notch.

[0012] During assembly, embed the flow rate dial into the circular recess at the upper end of the connection block and ensure that the positioning part on the edge of the flow rate dial is located within the notch at the upper end of the connection block. Then, screw on the anti-disassembly screw, thereby fixing the flow rate dial to the connection block. The cooperation between the positioning part and the notch not only ensures the circumferential fixation of the connection block and the flow rate dial but also ensures that the zero position of the flow rate dial exactly corresponds to the position when the ball valve is in the closed state.

[0013] In the above ball valve, a number of convex strips are circumferentially distributed on the outer side wall of the connection block, and a notch groove is formed between two adjacent convex strips.

[0014] By circumferentially distributing a number of convex strips on the outer side wall of the connection block and arranging a notch groove between two adjacent convex strips, the outer contour of the connection block is made into an unconventional shape, which ensures that it is very difficult for others to find the corresponding tools for operation. Only an operation sleeve specifically provided with a socket hole having the same shape as the outer contour of the connection block can be used for operation.

[0015] In the above ball valve, the protective part has a convex ring within the upper orifice of the protective hole. A lock head is arranged within the upper orifice of the protective hole. The outer side of the upper end of the lock head has an annular shoulder that abuts against the upper side surface of the convex ring. A circular lock block is rotatably arranged within the lock head. A mating hole is provided at the central position of the lock block. A through hole is provided at the side part of the lock head. A spherical ball with a diameter larger than the through hole is also arranged within the lock head. The spherical ball abuts against the outer side wall of the lock block and part of the spherical ball extends out of the through hole and abuts against the lower side surface of the convex ring. A notch is provided at a position on the outer side of the lock block that is at the same height as the through hole. A relief hole communicating with the mating hole is provided at the upper end part of the lock head. This ball valve further includes an unlocking key. The unlocking key has a mating end. The mating end can pass through the relief hole and be inserted into the mating hole to form circumferential fixation with the lock block. A magnet is arranged within the mating end. When the unlocking key drives the lock block to rotate until the notch is opposite to the through hole, the magnet can adsorb the spherical ball so that part of it is located within the notch and is separated from the convex ring.

[0016] The lock head is locked within the upper orifice of the protective hole, which can block the upper port of the protective hole and prevent others from accessing the connection block. In the locked state, the annular shoulder on the outer side of the upper end of the lock head abuts against the upper side surface of the convex ring, while the spherical ball abuts against the lower side surface of the convex ring (at this time, the notch on the outer side of the lock block and the through hole on the side part of the lock head are circumferentially misaligned). At this time, it is equivalent to the convex ring being clamped between the annular shoulder and the spherical ball, thus preventing the lock head from being taken out of the protective hole. In the locked state, the lock head is built into the protective hole. Such a locking method is not easily damaged by others through violence, and at the same time, the unlocking method is relatively special and it is not easy for others to buy a universal magnetic key on the market for unlocking.

[0017] When the flow rate needs to be adjusted, the user inserts the mating end of the unlocking key into the mating hole through the relief hole to form a circumferential fixation with the locking block, and then rotates the unlocking key to drive the locking block to rotate. When the notch on the outer side of the locking block is opposite to the through hole on the side of the lock head, the magnet arranged in the mating end will attract the ball to roll into the lock head and partially located in the notch to separate from the convex ring. After the ball separates from the convex ring, the lock head can be taken out from the protection hole, and then the user can put the operating sleeve on the connecting block to rotate the valve stem.

[0018] In the ball valve described above, the mating hole is a round hole. The locking block is also provided with a mating groove which penetrates the hole wall of the mating hole, and the mating groove penetrates the upper end face of the locking block. A relief groove communicating with the mating groove is provided on the hole wall of the relief hole. The mating end of the unlocking key is cylindrical and a mating head which can pass through the relief groove and insert into the mating groove is fixedly connected to the side thereof.

[0019] During unlocking, the mating end is inserted into the mating hole and the mating head is inserted into the mating groove through the relief groove, and then rotated. After rotation, the mating groove and the relief groove are misaligned, which is equivalent to the mating head being stuck in the vertical direction between the mating groove and the plane where the lower end hole of the relief hole is located. In this way, after the ball is attracted into the locking block by the magnet and separated from the convex ring, the user can directly lift the unlocking key to pull the lock body out of the protection hole together. Such a setting makes the unlocking operation more convenient.

[0020] In the ball valve described above, a blocking block is provided in the relief hole. The lower end of the blocking block is located in the mating hole and an annular blocking portion is provided on the outer side of the lower end of the blocking block. The outer diameter of the annular blocking portion is larger than the aperture of the relief hole. An acting spring is also provided in the mating hole, and the upper end of the acting spring abuts against the lower end portion of the blocking block.

[0021] The upper end of the acting spring abuts against the lower end portion of the blocking block, so that the blocking block can always keep the relief hole blocked without external force, which can protect the relief hole from being violently broken by others or maliciously blocked by other things.

[0022] In the ball valve described above, an annular first valve seat is provided in the water inlet end, and an annular second valve seat is provided in the water outlet end. The first valve seat and the second valve seat are respectively located on the front and rear sides of the ball core. Sealing gaskets are provided between the ball core and the first valve seat and between the ball core and the second valve seat in a abutting manner. The flow rate adjusting portion is integrally and fixedly connected in the central hole of the first valve seat.

[0023] Compared with the prior art, the ball valve has the following advantages:

[0024] 1. The outer contour shape of the connection block is non-circular, so that others cannot use other tools to sleeve the connection block without the above operation sleeve to operate it, and the connection block is located in the protection hole, so that others cannot directly use their hands or a wrench to turn the connection block. Therefore, the adjusted flow rate cannot be randomly adjusted by others, ensuring the reliability of use;

[0025] 2. The connection block is fixedly connected to the valve stem with anti-disassembly screws, which makes it impossible for others to remove the anti-disassembly screws with a conventional screwdriver, thus eliminating the possibility of removing the connection block and directly operating the valve stem;

[0026] 3. A flow rate scale disk is fixedly connected to the top of the connection block, and the user can directly understand the current flow rate from the flow rate scale disk to determine whether the flow rate is adjusted in place. Description of the Drawings

[0027] Figure 1 is a cross-sectional view of this ball valve.

[0028] Figure 2 is Figure 1 a cross-sectional view taken along the A-A direction in

[0029] Figure 3 is Figure 1 a partial enlarged view at the lock head in

[0030] Figure 4 is a three-dimensional schematic diagram of this ball valve.

[0031] Figure 5 is a three-dimensional schematic diagram of this ball valve from another angle.

[0032] Figure 6 is a connection schematic diagram among the valve stem, the connection block and the flow rate scale disk.

[0033] Figure 7 is an exploded schematic diagram among the valve stem, the connection block and the flow rate scale disk.

[0034] Figure 8 is an exploded schematic diagram of the valve stem, the connection block and the flow rate scale disk from another angle.

[0035] Figure 9 is a three-dimensional schematic diagram of the operation sleeve.

[0036] Figure 10 is a cross-sectional view of the unlocking key.

[0037] In the figure, 1 is the valve body; 1a is the water inlet end; 1b is the water outlet end; 1c is the flow rate adjustment part; 1c1 is the flow rate adjustment hole; 1d is the first valve seat; 1e is the second valve seat; 1f is the protection part; 1f1 is the protection hole; 1f2 is the convex ring; 2 is the ball core; 2a is the water passing hole; 3 is the valve rod; 3a is the connection part; 4 is the coupling block; 4a is the flat square hole; 4b is the circular concave pit; 4c is the notch; 4d is the convex strip; 4e is the notch groove; 5 is the anti-disassembly screw; 5a is the hexagon socket head; 5b is the convex part; 6 is the flow rate scale disk; 6a is the positioning part; 7 is the operation sleeve; 7a is the socket hole; 8 is the lock head; 8a is the upper connection body; 8a1 is the annular shoulder; 8a2 is the relief hole; 8a3 is the relief groove; 8b is the lower connection body; 8b1 is the through hole; 9 is the lock block; 9a is the mating hole; 9b is the notch; 9c is the mating groove; 10 is the spherical ball; 11 is the unlocking key; 11a is the mating end; 11b is the mating head; 12 is the magnet; 13 is the plug; 13a is the annular blocking part; 14 is the acting spring; 15 is the gasket. Detailed implementation mode

[0038] The following are specific embodiments of the present invention and in combination with the attached drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0039] As Figure 1 and Figure 5 shown, the ball valve includes a valve body 1 with a water inlet and a water outlet end 1b at the front and rear ends respectively, and a ball core 2 and a valve rod 3 both arranged inside the valve body 1. The lower end of the valve rod 3 is connected with the ball core 2, and the ball core 2 is horizontally arranged and provided with a water passing hole 2a through it. Inside the water inlet end 1a, there is a sheet-shaped flow rate adjustment part 1c, and the flow rate adjustment part 1c is provided with a flow rate adjustment hole 1c1 penetrating along the water inlet direction. Among them, the flow rate adjustment hole 1c1 has an upper side hole wall and a lower side hole wall, and the distance between the upper side hole wall and the lower side hole wall gradually increases in the left-right direction (it can gradually increase from left to right or from right to left, actually determined by the direction of the ball valve from closed to open). In this embodiment, the flow rate adjustment hole 1c1 is generally in a water droplet shape. Inside the water inlet end 1a, there is an annular first valve seat 1d, and inside the water outlet end 1b, there is an annular second valve seat 1e. The first valve seat 1d and the second valve seat 1e are respectively located on the front and rear sides of the ball core 2. Gaskets 15 are abutted and arranged between the ball core 2 and the first valve seat 1d and between the ball core 2 and the second valve seat 1e. The flow rate adjustment part 1c is integrally and fixedly connected to the central hole of the first valve seat 1d.

[0040] Furthermore, as Figure 1 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9As shown, the upper end of the valve body 1 has a cylindrical protective part 1f. The protective part 1f has a protective hole 1f1 penetrating its upper end face, and the upper end of the valve stem 3 extends into the protective hole 1f1. The upper end part of the valve stem 3 is fixedly connected with a connecting block 4 through an anti-disassembly screw 5. The outer contour of the connecting block 4 is non-circular. The upper end part of the connecting block 4 is fixedly connected with a flow rate scale disk 6. The upper surface of the flow rate scale disk 6 is provided with scale indexes along the circumferential direction, and the scale indexes correspond to the set flow rate. Specifically, the upper end part of the valve stem 3 has a flat-square-shaped connecting part 3a. The bottom of the connecting block 4 has a flat-square hole 4a matching with the connecting part 3a. The flow rate scale disk 6 is abutted against the connecting block 4. The rod part of the anti-disassembly screw 5 sequentially passes through the flow rate scale disk 6 and the connecting block 4 and is threadedly connected in the connecting part 3a. The central area of the head of the anti-disassembly screw 5 has an inner hexagon hole 5a. The central area of the bottom wall of the inner hexagon hole 5a protrudes with a protruding part 5b, and the protruding height of the protruding part 5b is the same as the opening depth of the inner hexagon hole 5a. The upper end of the connecting block 4 has a circular pit 4b and a notch 4c communicating with the circular pit 4b. The flow rate scale disk 6 is circular and is embedded in the circular pit 4b. The edge of the flow rate scale disk 6 has a sheet-shaped protruding positioning part 6a, and the positioning part 6a is located in the notch 4c. Among them, a plurality of convex strips 4d are distributed along the circumferential direction on the outer side wall of the connecting block 4. A notch groove 4e is formed between two adjacent convex strips 4d. This ball valve further includes an operation sleeve 7 having a socket hole 7a, and the shape of the socket hole 7a of the operation sleeve 7 is the same as the shape of the outer contour of the connecting block 4.

[0041] When the valve is in the closed state, the water passing hole 2a of the ball core 2 and the flow rate adjusting hole 1c1 of the flow rate adjusting part 1c are in a completely staggered state. When the valve needs to be opened, the user inserts the operation sleeve 7 into the protective hole 1f1 and sleeved the connecting block 4 through the socket hole 7a. Since the shape of the socket hole 7a is the same as the shape of the outer contour of the connecting block 4, when the user rotates the sleeve, the connecting block 4 will be driven to rotate. The connecting block 4 is fixedly connected with the valve stem 3 and the valve stem 3 is connected with the ball core 2, so that the ball core 2 will rotate, thereby making the water passing hole 2a and the flow rate adjusting hole 1c1 gradually coincide from being completely staggered. The overlapping part of the water passing hole 2a and the flow rate adjusting hole 1c1 increases linearly as the rotation angle of the ball core 2 increases, thus realizing the linear adjustment of the flow rate. After adjusting to the required flow rate, the operation sleeve 7 is removed. The user can directly know the current flow rate from the flow rate scale disk 6 to determine whether the flow rate is adjusted in place.

[0042] Since the outer contour shape of the connecting block 4 is non-circular, it makes it impossible for others to use other tools to sleeve the connecting block 4 without the above-mentioned operating sleeve 7 for operation; in addition, the connecting block 4 is located inside the protection hole 1f1, which is equivalent to forming protection from the outside of the connecting block 4, making it impossible for others to directly turn the connecting block 4 by hand or with a wrench, etc. As a result, the adjusted flow rate will not be randomly adjusted by others, ensuring the reliability of use.

[0043] Moreover, the connecting block 4 is fixedly connected to the valve stem 3 with anti-disassembly screws 5, which makes it impossible for others to remove the anti-disassembly screws 5 with a conventional screwdriver, thus eliminating the possibility of removing the connecting block 4 and directly operating on the valve stem 3.

[0044] Furthermore, as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 10 shown, the protection part 1f has a convex ring 1f2 inside the upper hole opening of the protection hole 1f1. A lock head 8 is arranged inside the upper hole opening of the protection hole 1f1. An annular shoulder 8a1 that abuts against the upper side surface of the convex ring 1f2 is arranged on the outer side of the upper end of the lock head 8. A circular lock block 9 is rotatably arranged inside the lock head 8. A fitting hole 9a is arranged at the central position of the lock block 9. A through hole 8b1 is arranged on the side part of the lock head 8. A spherical ball 10 with a diameter larger than the through hole 8b1 is also arranged inside the lock head 8. The spherical ball 10 abuts against the outer side wall of the lock block 9 and a part of the spherical ball 10 extends out of the through hole 8b1 and abuts against the lower side surface of the convex ring 1f2. A notch 9b is arranged at a position where the outer side of the lock block 9 is at the same height as the through hole 8b1. The upper end part of the lock head 8 has a relief hole 8a2 that communicates with the fitting hole 9a. This ball valve further includes an unlocking key 11. The unlocking key 11 has a fitting end 11a. The fitting end 11a can pass through the relief hole 8a2 and be inserted into the fitting hole 9a to form circumferential fixation with the lock block 9. A magnet 12 is arranged inside the fitting end 11a. When the unlocking key 11 drives the lock block 9 to rotate until the notch 9b is opposite to the through hole 8b1, the magnet 12 can adsorb the spherical ball 10 so that a part of it is located inside the notch 9b and is separated from the convex ring 1f2. Among them, the fitting hole 9a is a circular hole. The lock block 9 also has a fitting groove 9c. The fitting groove 9c penetrates the hole wall of the fitting hole 9a and the upper end surface of the lock block 9. A relief groove 8a3 that communicates with the fitting groove 9c is arranged on the hole wall of the relief hole 8a2. The fitting end 11a of the unlocking key 11 is cylindrical and a fitting head 11b that can pass through the relief groove 8a3 and be inserted into the fitting groove 9c is fixedly connected to the side part thereof. A plug 13 is arranged inside the relief hole 8a2. The lower end of the plug 13 is located inside the fitting hole 9a and an annular blocking part 13a is arranged on the outer side of the lower end of the plug 13. The outer diameter of the annular blocking part 13a is larger than the aperture of the relief hole 8a2. A working spring 14 is also arranged inside the fitting hole 9a. The upper end of the working spring 14 abuts against the lower end part of the plug 13.

[0045] The lock head 8 is locked in the upper end hole of the protection hole 1f1, which can block the upper end of the protection hole 1f1, so that others cannot access the connection block 4. In the locked state, the annular shoulder 8a1 on the outer side of the upper end of the lock head 8 abuts against the upper side of the convex ring 1f2, and the ball 10 abuts against the lower side of the convex ring 1f2 (at this time, the notch 9b on the outer side of the lock block 9 and the through hole 8b1 on the side of the lock head 8 are in a circumferentially misaligned state), which is equivalent to the convex ring 1f2 being sandwiched between the annular shoulder 8a1 and the ball 10, so that the lock head 8 cannot be taken out of the protection hole 1f1. In the locked state, the lock head 8 is built into the protection hole 1f1. This locking method is not easy to be violently destroyed by others, and the unlocking method is relatively special and not easy to be unlocked by others using a universal magnetic key purchased from the market.

[0046] When the flow rate needs to be adjusted, the user inserts the mating end 11a of the unlocking key 11 into the mating hole 9a through the clearance hole 8a2, and inserts the mating head 11b into the mating groove 9c through the clearance groove 8a3, so that the unlocking key 11 and the lock block 9 are fixed together in the circumferential direction, and then rotates the unlocking key 11. The unlocking key 11 will rotate with the lock block 9. When the notch 9b on the outside of the lock block 9 is opposite to the through hole 8b1 on the side of the lock head 8, the magnet 12 set in the mating end 11a will attract the ball 10 to roll toward the lock head 8 and partially locate in the notch 9b and separate from the convex ring 1f2. The user can directly lift the unlocking key 11 and pull the lock body out of the protective hole 1f1. Then the user can put the operating sleeve 7 on the outside of the connecting block 4 to rotate the valve stem 3 to adjust the flow rate as required. After the adjustment is completed, the lock head 8 is put back into the protective hole 1f1, and then the unlocking key 11 is rotated in the opposite direction until the matching groove 9c of the lock block 9 is connected with the yield groove 8a3 of the lock head 8, so that the unlocking key 11 can be pulled out from the lock head 8, and at the same time, the recess 9b is again in a position staggered with the through hole 8b1, so that the ball 10 is pushed outward and abuts against the lower side of the convex ring 1f2.

[0047] In this embodiment, if Figure 3 As shown, the lock head 8 includes an upper connecting body 8a and a lower connecting body 8b, both of which are in the shape of a cover. The opening of the upper connecting body 8a is set downward, and the opening of the lower connecting body 8b is set upward. The opening of the lower connecting body 8b is sleeved outside the lower end of the upper connecting body 8a (in practice, the two can be welded and fixedly connected). The through hole 8b1 is set on the side of the lower connecting body 8b. The side of the upper connecting body 8a is provided with a limiting hole at a position corresponding to the position of the through hole 8b1. The ball 10 passes through the limiting hole and the aperture of the limiting hole matches the diameter of the ball 10. The clearance hole 8a2 and the annular shoulder 8a1 are both located in the upper connecting body 8a, and the lower end of the action spring 14 abuts against the inner bottom wall of the lower connecting body 8b. In order to improve the locking effect, the number of the balls 10 is at least two, and the number of the notches 9b, the limiting holes and the through holes 8b1 is also set to at least two.

[0048] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A ball valve, comprising a valve body (1) having a water inlet end (1a) and a water outlet end (1b) at the front and rear ends respectively, and a ball core (2) and a valve stem (3) both arranged in the valve body (1), wherein the lower end of the valve stem (3) is connected to the ball core (2), the ball core (2) is provided with a through water hole (2a) in the transverse direction, a sheet-shaped flow regulating part (1c) is provided in the water inlet end (1a), and the flow regulating part (1c) is provided with a flow regulating hole (1c1) in the water inlet direction, characterized in that: The upper end of the valve body (1) has a columnar protective portion (1f), the protective portion (1f) has a protective hole (1f1) penetrating its upper end surface, the upper end of the valve stem (3) extends into the protective hole (1f1), the upper end of the valve stem (3) is fixedly connected to a connecting block (4) via an anti-disassembly screw (5), the outer contour of the connecting block (4) is non-circular, the upper end of the connecting block (4) is fixedly connected to a flow dial (6), and the ball valve also includes an operating sleeve (7) having a sleeve hole (7a), the sleeve hole (7a) of the operating sleeve (7) having the same shape as the outer contour of the connecting block (4).

2. The ball valve according to claim 1, characterized in that: The upper end of the valve stem (3) has a flat square connection portion (3a), the bottom of the connecting block (4) has a flat square hole (4a) matched with the connection portion (3a), the flow scale (6) is arranged against the connecting block (4), and the rod of the anti-disassembly screw (5) passes through the flow scale (6) and the connecting block (4) in sequence and is threadedly connected in the connecting portion (3a).

3. The ball valve according to claim 2, characterized in that: The upper end of the connecting block (4) is provided with a circular pit (4b) and a notch (4c) connected to the circular pit (4b); the flow scale (6) is circular and embedded in the circular pit (4b); the edge of the flow scale (6) is provided with a positioning portion (6a) protruding in a sheet shape, and the positioning portion (6a) is located in the notch (4c).

4. The ball valve according to claim 3, characterized in that: The outer side wall of the coupling block (4) is provided with a plurality of convex strips (4d) distributed along the circumferential direction, wherein a notch groove (4e) is formed between two adjacent convex strips (4d).

5. The ball valve according to claim 1, 2, 3 or 4, characterized in that: The protection part (1f) has a convex ring (1f2) in the upper end opening of the protection hole (1f1), a lock head (8) is arranged in the upper end opening of the protection hole (1f1), the upper outer side of the lock head (8) has an annular stop shoulder (8a1) abutting against the upper side surface of the convex ring (1f2), a circular lock block (9) is rotatably arranged in the lock head (8), a matching hole (9a) is arranged at the center position of the lock block (9), a through hole (8b1) is arranged on the side of the lock head (8), and a ball (10) with a diameter larger than the through hole (8b1) is also arranged in the lock head (8), the ball (10) abuts against the outer side wall of the lock block (9), and a part of the ball (10) extends out of the through hole (8b1) and abuts against the lower side surface of the convex ring (1f2), A notch (9b) is provided on the outer side of the lock block (9) at a position that is in accordance with the height of the through hole (8b1), and the upper end of the lock head (8) has a clearance hole (8a2) that is connected to the matching hole (9a). The ball valve also includes an unlocking key (11), and the unlocking key (11) has a matching end (11a). The matching end (11a) can pass through the clearance hole (8a2) and be inserted into the matching hole (9a) to form a circumferential fixation with the lock block (9). A magnet (12) is provided in the matching end (11a). When the unlocking key (11) drives the lock block (9) to rotate until the notch (9b) and the through hole (8b1) are opposite, the magnet (12) can absorb the ball (10) so that part of the ball is located in the notch (9b) and separated from the convex ring (1f2).

6. The ball valve according to claim 5, characterized in that: The matching hole (9a) is a circular hole, the lock block (9) is further provided with a matching groove (9c) and the matching groove (9c) passes through the hole wall of the matching hole (9a), the matching groove (9c) passes through the upper end surface of the lock block (9), the hole wall of the clearance hole (8a2) is provided with a clearance groove (8a3) connected with the matching groove (9c), and the matching end (11a) of the unlocking key (11) is cylindrical and its side is fixedly connected with a matching head (11b) that can pass through the clearance groove (8a3) and be inserted into the matching groove (9c).

7. The ball valve according to claim 6, characterized in that: A blocking block (13) is provided in the clearance hole (8a2), ​​the lower end of the blocking block (13) is located in the matching hole (9a), and an annular blocking portion (13a) is provided on the outer side of the lower end of the blocking block (13), the outer diameter of the annular blocking portion (13a) is larger than the hole diameter of the clearance hole (8a2), ​​and an action spring (14) is also provided in the matching hole (9a), and the upper end of the action spring (14) abuts against the lower end of the blocking block (13).

8. The ball valve according to claim 1, characterized in that: The water inlet end (1a) has a first annular valve seat (1d), and the water outlet end (1b) has a second annular valve seat (1e). The first valve seat (1d) and the second valve seat (1e) are respectively located at the front and rear sides of the ball core (2). A sealing gasket (15) is provided between the ball core (2) and the first valve seat (1d) and between the ball core (2) and the second valve seat (1e). The flow regulating part (1c) is integrally fixed to the center hole of the first valve seat (1d).

Images