CN217539688U - Ball core limiting valve - Google Patents

Abstract

The utility model discloses a ball core limiting valve, which belongs to the technical field of valves and comprises a ball valve body, a valve core rotationally connected in the ball valve body, a valve rod fixed on the valve core and an adjusting handle, wherein the adjusting handle comprises a rotating handle and a positioning handle, the positioning handle is movably connected on the rotating handle, and the rotating handle is fixed on the valve rod; be equipped with the location tooth's socket of a plurality of confession location handle end joints on the ball valve body, a plurality of location tooth's sockets correspond the different angle that opens and shuts of case respectively, the end of location handle can break away from the location tooth's socket on its activity orbit, only need move the location handle along the activity orbit of location handle during the unblock, can make the location handle break away from the location tooth's socket, thereby the unblock is in order to carry out the regulation of case angle that opens and shuts, only need make the location handle normal position that restores to the throne after having adjusted, can lock again, compare in the mode that traditional ball valve adopted screw and calibrated scale to carry out the locking, this ball core limit valve locking mode "smooth silk" problem can not appear, and is more convenient and reliable.

Description

Ball core limiting valve

Technical Field

The utility model relates to the technical field of valves, especially, relate to a ball core limit valve.

Background

The ball valve is widely applied to industries such as petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration, steel and the like, and plays a significant role in economy in China. The ball valve is mainly used for cutting, distributing and changing the flow direction of a medium in a pipeline, a valve core of the ball valve is a sphere, a circular through hole used for being communicated with a ball valve body is formed in the valve core, a valve rod and a rotating handle for controlling the rotating angle of the valve core are arranged on a shaft head of the valve core, the rotating amplitude of the rotating handle is equal to the opening angle of the valve core, and therefore the size of the communication between the circular through hole in the valve core and the ball valve body can be changed by changing the rotating amplitude of the rotating handle, and the water consumption can be controlled.

At present for accurate control water consumption, can set up the calibrated scale on the pedestal of ball valve usually and show the twist grip turned angle, thereby make things convenient for people direct the angle that opens and shuts of knowing the case, simultaneously in order to avoid the violent increase of rivers to lead to the case to open the angle grow, still can set up positioning mechanism at present on the twist grip and fix a position, for example, the patent number is "201220736799.7", the utility model discloses a ball valve with positioning mechanism is disclosed to the patent name "a ball valve that is equipped with flow detection mouth and flow control locking function", it is equipped with the calibrated scale on the ball valve body, be equipped with 90 circumference angle annular through-hole on the calibrated scale, be equipped with set screw on the twist grip, the twist is carried out selectivity aperture location through set screw and calibrated scale and is screwed up, thereby avoid the problem that rivers increase in the pipeline leads to the aperture increase of case. However, the ball valve needs to loosen and tighten the positioning screw each time of adjustment, so that the positioning mode is complicated, the adjustment efficiency is low, and the problem of 'thread slipping' caused by frequent loosening and tightening of the positioning screw thread for a long time occurs.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving above-mentioned technical problem, provide a ball core limit valve, regulation handle is formed by twist grip and location handle loose joint, mutually supports through location handle and location tooth's socket, can unblock and locking fast to the angle of opening and shutting of quick adjustment case, and unblock and locking mode are simple reliable, need not worry the problem of "smooth silk" appears, long service life.

In order to achieve the above object, the utility model provides a following scheme: the utility model discloses a ball core limiting valve, which comprises a ball valve body, a valve core rotationally connected in the ball valve body, a valve rod fixed on the valve core and an adjusting handle, wherein the adjusting handle comprises a rotating handle and a positioning handle, the positioning handle is movably connected on the rotating handle, and the rotating handle is fixed on the valve rod; the ball valve comprises a ball valve body, wherein the ball valve body is provided with a plurality of positioning tooth grooves for clamping the end heads of the positioning handles, the positioning tooth grooves correspond to different opening and closing angles of the valve core respectively, and the end heads of the positioning handles can be separated from the positioning tooth grooves on the moving track of the positioning handles.

Preferably, the location handle with the twist grip articulates into the clip structure through the pivot, the cover is equipped with in the pivot and keeps location handle with the closed reset torsion spring in twist grip end.

Preferably, the ball valve body comprises two half valve housings which can be assembled into the ball valve body by means of a connecting flange and bolts.

Preferably, the valve body comprises a positioning fluted disc, a through hole for the valve rod to pass through is formed in the middle of the positioning fluted disc, a fixed clamping piece fixedly connected with connecting flanges on the two half valve housings is arranged on the positioning fluted disc, and the positioning fluted disc is arranged on the positioning fluted disc.

Preferably, the positioning tooth grooves are arranged in the range of 0 to 180 ° of the positioning toothed disc.

Preferably, a connecting pipe is arranged at the water inlet end of the ball valve body, threads are arranged on the inner wall of the connecting pipe, a socket pipe is arranged at the water outlet end of the ball valve body, a valve cavity for the valve core to be rotatably connected is arranged in the ball valve body, the valve cavity is communicated with the connecting pipe and the socket pipe, and a valve rod hole for the valve rod to extend out of the valve cavity is formed in the ball valve body.

Preferably, the valve core is provided with a water flowing channel which can be communicated with the connecting pipe and the receiving pipe.

Preferably, a first U-shaped sealing ring and a second U-shaped sealing ring are arranged at the contact position of the valve core, the connecting pipe and the connecting pipe.

Preferably, the outer wall of the adapting pipe is provided with two annular grooves which are arranged at intervals.

Preferably, a plurality of anti-slip grooves are circumferentially arranged on the outer wall of the connecting pipe.

The utility model discloses for prior art gain following technological effect:

1. the utility model discloses in having installed an adjusting handle on the valve rod, adjusting handle comprises twist grip and location handle loose joint, has set up the location tooth's socket that corresponds different angle that opens and shuts on the ball valve body simultaneously, and twist grip can block in the location tooth's socket under the normal condition to the locking of location tooth's socket, and the case can not take place to rotate this moment, has avoided the problem that rivers increase and reopen the case afterwards; it goes the removal location handle to only need to use the hand when adjusting the water yield, thereby the end of location handle just can break away from the unblock of location tooth's socket, go to rotate the twist grip this moment again, just, the angle that opens and shuts of adjustable case, make the location handle resume the normal position after adjusting, the end of location handle just can the joint at this moment in the location tooth's socket that corresponds, convenient and fast, compare in traditional set screw and calibrated scale and cooperate the location, this ball core limit valve locking and unblock are all very convenient, and the problem of "smooth silk" can not appear, the durability is good, long service life.

2. The utility model discloses in the regulation mode that has adopted the clip structural formula at adjustment handle, only need the hand to mention the location handle during regulation, the end of location handle just can the external rotation break away from the location tooth's socket and accomplish the unblock, only need loose hand after having adjusted, under the torsional spring effect that resets, the location handle just can automatic re-setting, quick locking, the process of whole unblock, locking is simple, reliable, the angle that opens and shuts that can quick adjustment case, and need not anxious "smooth silk" problem appear, long service life.

3. The utility model discloses well ball valve body has adopted assembled ball valve, can assemble through flange and bolt by two half valve casings and form, and not only easy to assemble internals is like case and valve rod, and the later stage is favorable to maintaining, changing the part of internal damage moreover.

4. The utility model discloses in case and connecting pipe with socket pipe contact department is equipped with first U-shaped sealing washer and second U-shaped sealing washer, can guarantee that the leakproofness of ball valve is stronger.

5. The utility model provides a be equipped with the annular groove of twice on the bolster outer wall, compare in the traditional ball valve of only recess one, hose is gone up in pegging graft to the bolster in this ball valve spacing valve to correspond the annular groove with the iron wire and bind the back, its fixed water pipe ability is stronger.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

FIG. 1 is a schematic perspective view of a ball core limiting valve;

FIG. 2 is an internal structural view of a ball core check valve;

FIG. 3 is a side view of the ball core stop valve with the clamping ends of the rotation handle and the positioning handle not open;

FIG. 4 is a side view of the ball element check valve after the clamping ends of the rotating handle and the positioning handle are opened;

FIG. 5 is a schematic view of the relationship between the positioning handle and the positioning splines when the valve core is opened to a maximum angle;

FIG. 6 is a schematic view of the positioning handle disengaged from the positioning splines in preparation for changing the opening angle of the valve core;

FIG. 7 is a schematic view of the positioning handle rotated to change the opening angle of the valve cartridge;

FIG. 8 is a schematic view of the relationship between the positioning handle and the positioning spline after the valve core opening angle has been changed;

FIG. 9 is a view showing the internal structure of the ball core check valve when the valve core is opened to the maximum angle;

fig. 10 is an internal structure view of the ball core limiting valve after the valve core opening angle is adjusted.

Description of reference numerals: 1. a ball valve body; 2. rotating the handle; 3. a positioning handle; 4. positioning a fluted disc; 5. positioning a tooth socket; 6. fixing the clamp; 7. a connecting flange; 8. bolt holes; 9. a connecting pipe; 10. a bearing pipe; 11. an annular groove; 12. an anti-slip groove; 13. a valve core; 14. a valve stem; 15. a valve cavity; 16. a through hole; 18. a first U-shaped seal ring; 19. a second U-shaped seal ring; 20. a tip; 21. and a water flow channel.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

This embodiment provides a ball core limit valve, as shown in fig. 1 to 10, including ball valve body 1, case 13, valve rod 14 and regulation handle, case 13 rotates to be connected inside ball valve body 1, and valve rod 14 fixed connection just stretches out ball valve body 1 on case 13. The adjusting handle mainly comprises a rotating handle 2 and a positioning handle 3, the positioning handle 3 is movably connected to the rotating handle 2, and the rotating handle 2 is fixed on the valve rod 14. Be equipped with a plurality of location tooth's socket 5 on the ball valve body 1, location tooth's socket 5 corresponds the different angle that opens and shuts of case 13 respectively, and the end 20 joint of location handle 3 is in a certain location tooth's socket 5 in a plurality of location tooth's socket 5 to can pin the regulation handle, make case 13 stable keep a certain angle size that opens and shuts unchangeably. Certainly, the end 20 of the positioning handle 3 can also be separated from the positioning tooth groove 5 to realize unlocking, specifically, when the positioning handle 3 moves on the rotating handle 2, the end 20 of the positioning handle 3 can be separated from the positioning tooth groove 5 on the moving track, and after the end 20 of the positioning handle 3 is separated from the positioning tooth groove 5, the positioning handle 3 and the rotating handle 2 are rotated at the moment, so that the valve rod 14 can be driven to change the opening and closing angle of the valve core 13, the opening size of the ball core limiting valve is changed, and the flow rate of water flow is changed. After the change, the positioning handle 3 is restored to the original position again, the end 20 of the positioning handle 3 is clamped into the corresponding positioning tooth groove 5 at the moment, and the adjusting handle is locked again to prevent the adjusting handle from rotating.

The movable connection mode between the positioning handle 3 and the rotating handle 2 has a plurality of modes:

the first kind, location handle 3 is along the length direction of twist grip 2, and sliding connection is on twist grip 2, and 20 joints in the end of initial position location handle 3 are in location tooth's socket 5, through pulling location handle 3 outward, can make the end 20 of location handle 3 break away from location tooth's socket 5, then can rotate location handle 3 and twist grip 2 simultaneously. Then, a reset mechanism such as a reset spring is arranged between the positioning handle 3 and the rotating handle 2, so that the adjusted positioning handle 3 is restored to the original position under the action of the reset mechanism, and then the end 20 of the positioning handle 3 is clamped into the corresponding positioning tooth grooves 5 again, so that the locking of the adjusting handle is completed.

Secondly, a sliding rod penetrates through the positioning handle 3 and the rotating handle 2 from a direction perpendicular to the surfaces of the two, external threads are arranged at two ends of the sliding rod, nuts are screwed on the two ends of the sliding rod, and then a reset mechanism, such as a reset spring, is arranged between the positioning handle 3 and the rotating handle 2. Then, the positioning handle 3 is pulled downwards, so that the end head 20 of the positioning handle 3 is separated from the positioning tooth groove 5 from the height direction, and then after the adjustment is finished, the hand loosening positioning handle 3 can return to the original position under the pulling of the return spring and return to the corresponding positioning tooth groove 5 at the moment, so that the locking of the adjusting handle is finished.

And thirdly, the positioning handle 3 and the rotating handle 2 form a clamp structure, the clamp structure has the clamp working principle, the end 20 of the positioning handle 3 is screwed downwards by pinching the positioning handle 3 and the rotating handle 2 by hands, the end 20 of the positioning handle 3 and the rotating handle 2 are opened so as to be separated from the positioning tooth grooves 5, then the end 20 of the positioning handle 3 is loosened to be closed, and the corresponding positioning tooth grooves 5 can be returned to, so that the locking of the adjusting handle is completed.

The specific adjustment process can be seen in fig. 3 to 8, which is a slightly smaller stage from the maximum opening of the ball core limiting valve:

initial stage (refer to fig. 5): the direction of the positioning handle 2 is parallel to the direction of water flow in the ball valve body 1, the end 20 of the positioning handle 3 is clamped in the positioning tooth groove 5 corresponding to the opening and closing angle of the valve core 13 by 90 degrees, and at the moment, the valve core 13 has the largest opening and closing angle, namely the moment when the water flow in the ball core limiting valve is the largest;

conditioning phase (1) (see fig. 6): the end 20 of the positioning handle 3 is separated from the positioning tooth groove 5, and at the moment, the water flow in the ball core limiting valve is still at the maximum;

conditioning phase (2) (see fig. 7): because the end 20 of the positioning handle 3 is separated from the positioning tooth socket 5, the positioning handle 3 and the rotating handle 2 can not be rotated at any block at the moment, then the positioning handle 3 and the rotating handle 2 are rotated anticlockwise by 30 degrees (the rotating angle is rotated according to actual needs, only an example is provided here, and only 30 degrees anticlockwise are not limited), at the moment, the positioning handle 3 forms an included angle of 30 degrees with the water flow direction, namely, the end 20 of the positioning handle 3 is exactly corresponding to the positioning tooth socket 5 at the position of 30 degrees, at the moment, the central line of the ball core limiting valve forms an included angle of 30 degrees with the water flow direction, and the water flow of the ball core limiting valve is reduced at the moment.

Completion phase (see fig. 8): the end 20 of the positioning handle 3 is clamped into the corresponding positioning tooth groove 15 at the moment, namely the positioning tooth groove 5 at the position of 30 degrees, the adjusting handle is locked again, and the positioning handle 3 forms an included angle of 30 degrees with the water flow direction at the moment, namely the central line of the ball core limiting valve forms an included angle of 30 degrees with the water flow direction.

In this embodiment, as shown in fig. 1 to 10, the positioning handle 3 and the rotating handle 2 adopt a third setting mode, that is, the positioning handle 3 and the rotating handle 2 are hinged to form a clip structure through a rotating shaft, and then a reset torsion spring is sleeved on the rotating shaft, and the closing of the ends 20 of the rotating handle 2 and the positioning handle 3 can be kept through the reset torsion spring. The rotating handle 2 is fixed at the top of the valve rod 14 through a screw, the positioning handle 3 is located below the rotating handle 2, the length of the positioning handle 3 is shorter than that of the rotating handle 2, the end 20 of the positioning handle 3 can be downwards rotated through pinching the tail end of the positioning handle 3 to form an opening state with the rotating handle 3, and the end 20 of the positioning handle 3 can be upwards rotated again to form a closing state with the rotating handle 2 under the action of a reset torsion spring when a hand is loosened. Referring to fig. 3, in this case, the rotating handle 2 and the positioning handle 3 are in a closed state, and the end 20 of the positioning handle 3 is clamped in the positioning spline 5. Referring to fig. 4, the turning handle 2 and the positioning handle 3 are in an open state, and the end 20 of the positioning handle 3 is disengaged from the positioning spline 5.

Further, in this embodiment, as shown in fig. 1 to 10, the positioning tooth socket 5 is a U-shaped groove, the bottom of the groove is a smooth semicircular surface, and correspondingly, the end surface of the end 20 of the positioning handle 3 is also a semicircular surface, and meanwhile, the length of the end 20 of the positioning handle 3 from the bottom to the top is gradually reduced, that is, after the end 20 of the positioning handle 3 is clamped into the positioning tooth socket 5, referring to fig. 3, the top of the end 20 is a certain distance away from the bottom of the U-shaped groove, but the bottom of the end 20 is just attached to the bottom of the U-shaped groove, which is favorable for the end 20 to be screwed into and out of the positioning tooth socket 5.

In this embodiment, as shown in fig. 1 to 10, the ball valve body 1 includes two half valve housings, the opposite end surfaces of the two half valve housings are integrally formed with a connecting flange 7, the connecting flange 7 is circumferentially provided with bolt holes 8, and the two half valve housings can be assembled into the ball valve body 1 through the connecting flange 7 and the bolts. Due to the arrangement mode, the components in the ball valve body 1, such as the valve core 13 and the valve rod 14, can be conveniently installed, and the components in the ball valve body 1 can be conveniently maintained after being damaged.

Further, in the present embodiment, as shown in fig. 1 to 10, the positioning device further includes a circular positioning toothed disc 4, the positioning toothed groove 5 is disposed at an edge of the positioning toothed disc 4, a through hole 16 is disposed at a middle portion of the positioning toothed disc 4, and a fixing clip 6 is disposed at a bottom portion of the positioning toothed disc 4. During installation, after the connecting flanges 7 on the two half valve housings are attached to each other and connected, the through hole 16 of the positioning fluted disc 4 is sleeved on the valve rod 14, the fixing clamp 6 is clamped on the two connecting flanges 7, and the fixing clamp 6 and the two connecting flanges 7 are fixed in a subsequent screwing or welding mode, so that the installation of the positioning fluted disc 4 can be completed.

In the present embodiment, as shown in fig. 1 to 10, the positioning tooth groove 5 is mainly disposed in the range of 0 to 180 ° of the positioning toothed disc 4, and the specific setting time is set according to the opening and closing angle of the valve core 13 as required, and the angle may be set at intervals of 5 °, 10 °, 15 ° or more. For example, the adjustment angles on the positioning fluted disc 4 include 0 °, 15 °, 30 °, 45 °, 60 °, 75 °, 90 °, 105 °, 120 °, 135 °, 150 °, 165 °, and 180 °.

In this embodiment, as shown in fig. 1 to 10, a connection pipe 9 is disposed at the water inlet end of the ball valve body 1, and a thread is disposed on an inner wall of the connection pipe 9 for matching and connecting with an external thread of the water outlet pipe. The water outlet end of the ball valve body 1 is provided with a socket pipe 10, a valve cavity 15 for the valve core 13 to be rotatably connected is arranged in the ball valve body 1, the valve cavity 15 is communicated with the connecting pipe 9 and the socket pipe 10, and a valve rod hole for the valve rod 14 to extend out of the valve cavity 15 is arranged on the ball valve body 1. During the installation, with connecting pipe 9 and faucet 10 respectively with water piping connection, water gets into ball valve body 1 from connecting pipe 9 in, and water is unable to pass through when case 13 is airtight, slowly rotates the rotation that valve rod 14 drove case 13, and case 13 and connecting pipe 9, behind the connecting pipe 9 intercommunication, water alright flow from faucet 10.

Further, in the present embodiment, as shown in fig. 1 to 10, the valve body 13 is provided with a water flow passage 21. When the adjusting handle is perpendicular to the water flow direction, the water flow channel 21 is also perpendicular to the water flow direction, at this time, the water flow channel 21 is not communicated with the connecting pipe 9 and the adapting pipe 10, the valve core 13 is in a closed state, and water flow cannot flow out of the adapting pipe 10. Then, the adjusting handle is slowly rotated to drive the valve rod 14 and the valve core 13 to rotate, the gap between the valve core 13 and the connecting pipe 9 and the adapting pipe 10 is continuously increased, the connecting area between the water flowing channel 21 and the connecting pipe 9 and the adapting pipe 10 is gradually increased, and the water yield is also continuously increased, as shown in fig. 10. After the adjusting handle rotates 90 degrees, that is, the adjusting handle is parallel to the water flow direction, at this time, the communication area between the water flow channel 21 and the connecting pipe 9 and the adapting pipe 10 reaches the maximum, and the water yield also reaches the maximum, as shown in fig. 9, at this time, the end 20 of the positioning handle 3 is clamped at the 90-degree positioning tooth groove 5 of the positioning tooth disc 4, so that the rotation of the valve core 13 can be limited, and the water passing amount of the valve core 13 can be controlled.

In the present embodiment, as shown in fig. 1 to 10, a first U-shaped seal ring 18 and a second U-shaped seal ring 19 are provided at the contact portion of the valve body 13 with the connecting pipe 9 and the faucet pipe 10. The first U-shaped sealing ring 18 and the second U-shaped sealing ring 19 are made of rubber materials, and when the valve core 13 rotates, the first U-shaped sealing ring 18 and the second U-shaped sealing ring 19 can be filled in gaps among the valve core 13, the connecting pipe 9 and the adapting pipe 10, so that the sealing performance of the ball valve is improved.

In this embodiment, as shown in fig. 1 to 10, two annular grooves 11 are formed on the outer wall of the adapting pipe 10 at intervals. After the hose is sleeved on the adapting pipe 10, the corresponding two annular grooves 11 are bound and fixed by iron wires, so that the capability of fixing the water pipe can be greatly improved. Because the traditional water valve generally only has one groove, the water pipe is easy to fall off after being connected, and the stability of the connection between the ball valve body 1 and the water pipe is improved by the design of the double annular grooves 11.

In this embodiment, as shown in fig. 1 to 10, a plurality of anti-slip grooves 12 are circumferentially arranged on the outer wall of the connecting pipe 9, so that the connecting pipe 9 can be conveniently screwed to connect the connecting pipe to the water outlet pipe in a threaded manner, thereby avoiding slipping. As well as for disassembly.

Further, in this embodiment, ball valve body 1, flange 7, case 13 and valve rod 14 adopt U modified material, and U modified material mainly forms by PPR and PE combined material preparation, and the PVC material that traditional ball valve adopted, U modified material are difficult to age, warp, prolong final ball valve life-span then. And 7000 yuan are expected to one ton to traditional PVC material, and 4500 tons are expected to novel U denaturalization material, very big reduction the cost to the live time has been prolonged. The rotating handle 2 and the positioning handle 3 can be made of the above-mentioned U-shaped modified material, and can also be made of a metal material such as aluminum alloy, stainless steel, etc. Of course, all the components can be made of materials according to needs, and the materials are not limited to the above materials.

The principle and the implementation mode of the utility model are explained by applying a specific embodiment, and the explanation of the embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims (10)

1. A ball core limiting valve comprises a ball valve body, a valve core rotationally connected in the ball valve body, and a valve rod fixed on the valve core, and is characterized by further comprising an adjusting handle, wherein the adjusting handle comprises a rotating handle and a positioning handle, the positioning handle is movably connected to the rotating handle, and the rotating handle is fixed on the valve rod; the ball valve comprises a ball valve body, wherein the ball valve body is provided with a plurality of positioning tooth grooves for clamping the end heads of the positioning handles, the positioning tooth grooves correspond to different opening and closing angles of the valve core respectively, and the end heads of the positioning handles can be separated from the positioning tooth grooves on the moving track of the positioning handles.

2. The ball core limiting valve according to claim 1, wherein the positioning handle and the rotating handle are hinged to form a clamp structure through a rotating shaft, and a reset torsion spring for keeping the ends of the positioning handle and the rotating handle closed is sleeved on the rotating shaft.

3. A ball core limiting valve according to claim 2, wherein the ball valve body comprises two half valve housings which can be assembled into the ball valve body by means of connecting flanges and bolts.

4. The ball core limiting valve according to claim 3, comprising a positioning toothed disc, wherein the positioning toothed disc is disposed on the positioning toothed disc, a through hole for the valve rod to pass through is formed in a middle portion of the positioning toothed disc, and fixing clips fixedly connected to the connecting flanges of the two half valve housings are disposed on the positioning toothed disc.

5. The ball plunger limit valve according to claim 4, wherein the positioning splines are arranged within a range of 0-180 ° of the positioning splines.

6. The ball element limiting valve according to any one of claims 1 to 5, wherein a connecting pipe is provided at the water inlet end of the ball valve body, threads are provided on the inner wall of the connecting pipe, a socket pipe is provided at the water outlet end of the ball valve body, a valve cavity for rotatably connecting the valve element is provided in the ball valve body, the valve cavity is communicated with the connecting pipe and the socket pipe, and a valve rod hole for extending the valve rod out of the valve cavity is provided on the ball valve body.

7. The ball core limiting valve according to claim 6, wherein the valve core is provided with a water channel which can be communicated with the connecting pipe and the adapting pipe.

8. The ball core limit valve according to claim 7, wherein a first U-shaped sealing ring and a second U-shaped sealing ring are arranged at the contact position of the valve core and the connecting pipe as well as the adapting pipe.

9. The ball core limiting valve according to claim 8, wherein the outer wall of the adapting pipe is provided with two annular grooves arranged at intervals.

10. The ball core limiting valve according to claim 9, wherein a plurality of anti-slip grooves are circumferentially arranged on the outer wall of the connecting pipe.

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