CN224201174U - A three-way ball valve - Google Patents

Abstract

This application relates to the field of valve technology and provides a three-way ball valve, including a valve body with interconnected horizontal and vertical channels inside; a ball core rotatably located at the junction of the horizontal and vertical channels and having an L-shaped channel for communicating with the horizontal and vertical channels; a rotatable inner tube assembly inside the valve body; the rotatable inner tube assembly includes: an inner tube, radially clearance-fitted within the horizontal channel; a sealing structure disposed in the gap between the fluid inlet end of the valve body and the inner tube; a rotation operation structure for rotating the inner tube relative to the valve body; and a limiting structure for limiting the displacement of the inner tube along the axial direction of the horizontal channel. The three-way ball valve provided by this application reduces deposits by rotating the inner tube, and its detachable design facilitates maintenance, effectively improving the technical problems of severe deposit accumulation and difficult cleaning in traditional three-way ball valves.

Description

Three-way ball valve

Technical Field

The application relates to the technical field of valves, in particular to a three-way ball valve.

Background

The three-way ball valve is used as an important fluid control device and is widely applied to the fields of petrochemical industry, energy transportation, water supply and drainage systems and the like. The traditional three-way ball valve is generally composed of a valve body, a ball core and a sealing assembly, and the switching or converging and diverging functions of the fluid channels are realized through the rotation of the ball core. In conventional designs, an L-shaped or T-shaped channel is provided within the core to control the flow direction of the fluid through a 90 degree rotation of the core.

However, in practical applications, such valves have long been in the working environment of fluid media (in particular media containing particles, impurities or corrosive elements), with the following technical pain points:

1. Deposit accumulation problem, namely, when the fluid flow speed is low or the medium viscosity is high, solid particles and deposits are easy to deposit at the bottom of the valve body channel. Because the inner wall of the traditional ball valve channel is of a fixed structure, sediment is adhered to the lower side of the channel for a long time and is difficult to clean, so that the effective drift diameter of the flow channel is reduced, local corrosion is possibly caused, and the sealing performance and the service life of the valve are seriously influenced.

2. The cleaning and maintenance are difficult, and in order to solve the deposition problem in the prior art, the valve is usually required to be shut down and disassembled for manual cleaning, or an external flushing device is additionally arranged. The former results in system operation interruption and high maintenance cost, while the latter increases equipment complexity and makes implementation difficult in a narrow space or under high-pressure working conditions.

In view of the foregoing, there is a need in the industry for a three-way ball valve solution that can actively remove sediment without having to disassemble the valve while maintaining a compact and convenient operation.

Disclosure of utility model

The embodiment of the application provides a three-way ball valve, which can solve the technical problems of sediment accumulation and difficult cleaning and maintenance of the three-way ball valve in the related technology.

The embodiment of the application provides a three-way ball valve, which comprises a valve body, a ball core, a rotatable inner pipe assembly and a limiting structure, wherein a horizontal channel and a vertical channel which are communicated with each other are formed in the valve body, the ball core is rotatably positioned at the joint of the horizontal channel and the vertical channel and is provided with an L-shaped channel which is used for being communicated with the horizontal channel and the vertical channel, the rotatable inner pipe assembly is arranged in the valve body and comprises an inner pipe which is arranged in the horizontal channel through radial clearance fit, a sealing structure is arranged in a gap between a fluid inlet end of the valve body and the inner pipe, the rotating operation structure is used for enabling the inner pipe to rotate relative to the valve body, and the limiting structure is used for limiting displacement of the inner pipe along the axial direction of the horizontal channel.

The technical scheme of the embodiment of the application has the technical effects that when the fluid flow rate is low or the medium viscosity is high, solid particles and sediments are easy to deposit at the bottom of the inner pipe channel, at the moment, the inner pipe is rotated by the operating piece, the solid particles and sediments at the bottom can come to the top end, and the solid particles and sediments are more easy to separate from the fluid flowing out along with the fluid under the action of gravity in cooperation with the flushing action of the fluid in the flow channel. And when the inner pipe needs to be cleaned, the inner pipe can be taken out from the horizontal channel only by disconnecting the connecting pipeline and detaching the operating piece and the limiting structure, so that the inner pipe is convenient to clean.

In some embodiments, the sealing structure comprises a sealing groove arranged on the inner wall of the valve body, and a lip seal arranged on the sealing groove, wherein a lip seal part of the lip seal is jointed with the outer wall of the inner tube.

In some embodiments, the lip seal comprises a seal body, the lip seal part is arranged on one side of the seal body, close to the inner tube, and is provided with a main seal lip and an auxiliary seal lip, a V-shaped grease storage groove is formed between the main seal lip and the auxiliary seal lip, grease is filled in the V-shaped grease storage groove, a metal framework is embedded in the seal body, and an elastic hollow metal ring is embedded on the periphery of the main seal lip.

In some embodiments, the sealing main body is in an L-shaped arrangement, the lip-shaped sealing part is connected to the inner periphery of the sealing main body and forms a cavity with the sealing main body, the end part of the cavity close to the inner tube is arranged, the metal framework is an annular metal piece with an L-shaped section, the metal framework is embedded on the inner wall of the sealing main body close to the cavity, the end part of the main sealing lip, which is opposite to the auxiliary sealing lip, close to the inner tube is arranged, a second check ring is arranged between the lip-shaped sealing part and the inner wall of the sealing groove of the valve body, and the end part of the second check ring, which is opposite to the lip-shaped sealing part and is far away from the inner tube, is arranged.

In some embodiments, the rotary operating structure includes a radial slot provided on the valve body, a connection provided on an outer wall of the inner tube, an operating member connected to the connection, the operating member passing through the radial slot.

In some embodiments, the operating member comprises an operating rod, an operating head and an operating connecting end which are sequentially connected, wherein the operating rod is arranged in a radial slotted groove, the surface of the operating rod is in clearance fit with groove walls on two sides, the operating head is arranged outside the valve body, and the operating connecting end is detachably connected with a connecting part of the outer wall of the inner pipe.

In some embodiments, two ends of the radial slot of the valve body are arranged in arc fillets, two ends of the radial slot and two side slot walls form a range limiting area, and the operating rod is limited to move in the range limiting area.

In some embodiments, the limiting structure comprises a first limiting matching structure formed by a first annular bulge arranged on the inner wall of the valve body and one end of the inner tube, which is close to the ball core, a second limiting matching structure formed by a first check ring detachably connected to the inner wall of the valve body and one end, which is far away from the ball core, of the inner tube, and a third limiting matching structure formed by a second annular bulge arranged on the outer wall of the inner tube and one end, which is far away from the ball core, of the inner tube, and an annular groove formed by the second annular bulge and one end, which is far away from the ball core, of the inner tube, wherein the first limiting matching structure and the third limiting matching structure limit axial displacement and radial displacement jointly, and the second limiting matching structure inhibit axial displacement.

In some embodiments, the first annular protrusion is an annular structure with an L-shaped cross section, an annular clearance space is formed between the L-shaped annular structure and the inner wall of the valve body, the annular clearance space allows the inner tube to be accommodated in a nested manner, and the inner tube is limited to move in a single axial direction close to the ball core.

In some embodiments, the second annular protrusion includes a first mating surface and a second mating surface, the first mating surface is located at an outer periphery of the second annular protrusion, the second mating surface is located at one end of the second annular protrusion, which is close to the direction of the ball core, the second mating surface is a conical surface, the bottom surface of the annular groove of the valve body is a conical surface adapted to the second mating surface, and the second mating surface is attached to the bottom surface of the annular groove of the valve body.

The valve has the advantages that 1, the valve actively prevents deposition, namely, through the rotatable inner pipe, under the condition that a valve is not required to be disassembled, the inner pipe is rotated on line by only controlling the operating piece, deposits at the bottom of the pipeline are turned to the upper part, the deposits can flow out along with the fluid under the action of gravity in cooperation with flushing of the fluid, the deposition problem of the inner wall of the pipeline can be improved, the valve disassembling and cleaning frequency is reduced, a scheme is provided for the problem of depositing the deposits of the traditional ball valve, 2, the valve rapidly maintains that the design of the inner pipe is disassembled, the traditional valve body cleaning is changed into the inner pipe cleaning, and the cleaning efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B;

FIG. 4 is an enlarged view of a portion of FIG. 1 at C;

FIG. 5 is a schematic view of an operating member of the present utility model;

FIG. 6 is a schematic view of an assembly of the present utility model;

wherein, each reference sign in the figure:

The device comprises a valve body, a 2-horizontal channel, a 3-ball core, a 4-inner tube, a 5-sealing structure, a 50-main lip, a 51-auxiliary lip, a 52-metal framework, a 53-elastic hollow metal ring, a 54-second retainer ring, a 55-V-shaped fat storage groove, a 6-rotating operation structure, a 60-operation piece, a 601-operation rod, a 602-operation head, a 603-operation connection end, a 61-radial slot, a 62-connection part, a 7-first annular bulge, a 8-second annular bulge and a 9-first retainer ring.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs, and the terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the application. The terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, "and/or" is merely an association relationship describing the association object, and means that three relationships may exist, for example, a and/or B may mean that a exists alone, while a and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be noted that, in the present application, words such as "in some embodiments," "illustratively," "for example," and the like are used to indicate examples, illustrations, or descriptions. Any embodiment or design described herein as "in some embodiments," "illustratively," "for example," should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "in some embodiments," "illustratively," "for example," and the like is intended to present related concepts in a concrete fashion, meaning that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The three-way ball valve is used as an important fluid control device and is widely applied to the fields of petrochemical industry, energy transportation, water supply and drainage systems and the like. The traditional three-way ball valve is generally composed of a valve body, a ball core and a sealing assembly, and the switching or converging and diverging functions of the fluid channels are realized through the rotation of the ball core. In conventional designs, an L-shaped or T-shaped channel is provided within the core to control the flow direction of the fluid through a 90 degree rotation of the core.

Based on the above, in order to solve the technical problems of sediment accumulation and cleaning and maintenance difficulty of the three-way ball valve in the related art, the following scheme is provided in the embodiment of the application.

Referring to fig. 1 and 5, the embodiment of the application provides a three-way ball valve, which comprises a valve body 1, a ball core 3, a rotatable inner pipe assembly and a rotary operation structure, wherein the inner pipe 1 is internally provided with a horizontal channel 2 and a vertical channel which are mutually communicated, the ball core 3 is rotatably positioned at the joint of the horizontal channel 2 and the vertical channel and is provided with an L-shaped channel which is used for being communicated with the horizontal channel 2 and the vertical channel, the rotatable inner pipe assembly is arranged in the valve body 1 and comprises an inner pipe 4 which is arranged in the horizontal channel 2 through radial clearance fit, the sealing structure 5 is arranged in a gap between the fluid inlet end of the valve body 1 and the inner pipe 4, and the rotary operation structure is used for enabling the inner pipe 4 to rotate relative to the valve body 1. And the limiting structure is used for limiting the displacement of the inner tube 4 along the axial direction of the horizontal channel 2.

When in the initial state, fluid enters from the inlet end and passes straight along the horizontal channel 2. However, when the fluid flow rate is low or the medium viscosity is high, solid particles and sediments are easy to fall on the bottom of the valve body channel, and sediment is formed in the long term. When in a working state, the inner tube 4 is placed in the horizontal channel 2, and when fluid enters from the inlet end, the fluid directly enters the inner channel of the inner tube 4, and solid particles and sediments are easy to fall on the bottom of the inner tube 4. When the inner pipe 4 rotates, the particles newly settled at the bottom can be transferred to the upper end of the channel, and are more easily separated from the fluid flowing out along with the flushing action of the fluid in the flow channel under the action of gravity. When the inner tube 4 needs to be disassembled and assembled, the inner tube 4 can be drawn out from the valve body fluid channel for replacement or cleaning by only disconnecting the connecting pipeline and reversely rotating the operating member 60 to separate the inner tube 4 and then disassembling the retainer ring, so that the maintenance is convenient and fast.

It can be seen from the above that the three-way ball valve provided by the embodiment of the application can improve the deposition problem of the inner wall of the pipeline by only controlling the operating member 60 through the rotatable inner pipe without disassembling the valve, and provides a scheme for the problem of deposition accumulation of the traditional ball valve.

In some embodiments, referring to fig. 1 and 4 together, the sealing structure 5 includes a sealing groove provided on an inner wall of the valve body 1, and a lip seal provided on the sealing groove, and a lip seal portion of the lip seal is attached to an outer wall of the inner tube 4.

Compared with a common sealing ring, the lip-shaped sealing member has small contact area between the flexible lip and the shaft, and lower friction force and heat generation, and is more suitable for the relative rotation environment of the sealing surface.

In some embodiments, referring to fig. 1 to 4 together, the lip seal includes a seal body, the seal body is in an L-shape, a lip seal portion is disposed on a side of the seal body near the inner tube 4, the lip seal portion includes a main seal lip 50 and a sub seal lip 51, a V-shaped grease storage groove 55 is formed between the main seal lip 50 and the sub seal lip 51, and grease is filled in the V-shaped grease storage groove 55.

The metal framework 52 is embedded in the sealing main body, the metal framework 52 is an annular metal piece with an L-shaped section, and the annular metal piece is embedded in the inner wall, close to the cavity, of the sealing main body and used for enhancing the structural strength of the sealing piece and preventing compression deformation. An elastic hollow metal ring 53 is embedded in the outer circumference of the main seal lip 50 for providing a continuous radial elastic force to compensate for wear of the seal lip or shaft eccentricity.

The lip seal is connected to the inner periphery of the seal body and forms a cavity with the seal body, the cavity being provided near the end of the inner tube 4. The low pressure side of the lip seal is provided with a second retainer ring 54, the second retainer ring 54 is positioned outside the auxiliary sealing lip 51, and is used as a rigid support to block the medium pressure from directly acting on the back surface of the sealing lip, so that the reverse pressure deformation of the lip is avoided. The second retainer ring 54 cooperates with the first retainer ring 9 to limit the axial movement of the inner tube 4.

When the water flow flows in, the water flow enters the lip of the lip seal, so that the main sealing lip 50 and the auxiliary sealing lip 51 are tightly attached to the outer wall of the inner tube 4 under the action of water pressure, and dynamic rotary sealing is realized. Wherein:

the main sealing lip 50 plays a main sealing function and directly contacts the sealed medium, so that the sealing effect under high pressure difference is ensured;

the auxiliary sealing lip 51 serves as a redundant sealing barrier, prevents medium leakage when the main sealing lip fails, blocks invasion of external pollutants, and improves sealing reliability;

The grease in the V-shaped grease storage groove 55 continuously lubricates the contact surfaces of the main sealing lip and the auxiliary sealing lip, so that friction torque is reduced, and lip ablation caused by dry friction is avoided;

The metal skeleton 52 enhances the overall rigidity of the seal, prevents deformation under installation or high pressure conditions, and ensures a tight fit of the seal to the shaft or housing;

The elastic hollow metal ring 53 maintains the contact pressure between the main sealing lip 50 and the inner tube 4 through elastic force, and is dynamically adjusted when the shaft slightly jumps or wears to avoid leakage, and the metal ring is relatively solid and has elastic compensation space.

Alternatively, referring to fig. 2 and 6, the rotary operating structure includes a radial slot 61 formed in the outer wall of the valve body 1, a connecting portion 62 fixed to the outer wall of the inner tube 4, and an operating member 60 connected to the connecting portion, the operating member passing through the radial slot 61.

Wherein, radial fluting 61 both ends of valve body are the arc fillet setting, and the both ends of radial fluting (61) and both sides cell wall form the range restriction district, and the action bars restriction is in the range restriction district removal, and the removal angle can be 0-180. By the arrangement, friction between the groove wall and the operating piece 60 can be reduced, and meanwhile, sediment can be separated from the bottom of the inner pipe as much as possible by 180-degree rotation, and the structural strength of the valve body cannot be negatively influenced too much.

Alternatively, referring to fig. 1 and 6, the operating member 60 includes an operating lever 601, an operating head 602 and an operating connecting end 603 sequentially connected, the operating lever 601 is disposed in a groove of the radial slot 61 and has a surface in clearance fit with two side groove walls, the operating head 602 is disposed outside the valve body 1, and the operating connecting end 603 is detachably connected with the connecting portion 62 of the outer wall of the inner tube 4.

The length of the operating rod 601 extending out of the valve body meets good rotation interactivity, the gap between the operating rod 601 and the radial slot 61 is 0.1-0.5mm, smooth rotation is ensured, particle jamming is avoided, the operating head 602 is in smooth contact with a hand, and the connecting mode of the operating connecting end 603 and the connecting part 62 of the outer wall of the inner tube 4 can be threaded connection or fixed pins.

When the operation piece 60 is connected by screw threads, the operation piece 60 is rotated into the inner pipe wall to a certain depth which is not more than half of the depth of the inner pipe wall, the operation piece 60 can be separated from the connecting part 62 on the outer wall of the inner pipe 4 only by reversely rotating the operation piece 60 for three circles during disassembly, when the operation piece 60 is disassembled, a pipeline connected with the valve is disconnected, and meanwhile, the first check ring 9 is disassembled, so that the inner pipe 4 can be taken out of the horizontal channel 2 without barriers, and the inner pipe 4 can be conveniently cleaned later.

Optionally, referring to fig. 1 to 3, the limit structure of the three-way ball valve comprises the following technical characteristics that a first annular protrusion 7 is arranged on the inner wall of the valve body 1, and the first annular protrusion 7 and the end face of the inner tube 4, which is close to the ball core 3, form a first limit matching structure for limiting the axial displacement of the inner tube 4 towards the ball core 3. The first annular protrusion 7 has an annular structure with an L-shaped cross section, and forms an annular clearance space with the inner wall of the valve body 1, and the annular clearance space is used for accommodating the end nesting of the inner tube 4.

One end of the outer wall of the inner tube 4, which is far away from the direction of the ball core 3, is provided with a second annular bulge 8, and the second annular bulge 8 comprises a first matching surface positioned at the periphery and a second matching surface close to the direction of the ball core 3. The second matching surface is a conical surface and is mutually matched with the conical bottom surface of the annular groove at the corresponding position of the inner wall of the valve body 1 to form a third limit matching structure for restraining the axial movement of the inner tube 4 and restraining the radial displacement.

The inner wall of the valve body 1 is also provided with a first check ring 9 which is detachably connected, the first check ring 9 is an open-type shaft check ring, and the first check ring is elastically reset and fixed in an annular groove arranged on the inner wall of the valve body 1 after being compressed by a clamp spring clamp, and forms a second limit matching structure with the end face of one end of the inner pipe 4, which is away from the ball core 3.

During installation, the inner tube 4 is axially pushed into the valve body 1 along the horizontal channel 2, and the assembly process comprises the steps of firstly inserting the end part of the inner tube 4, which is close to the ball core 3, into an annular clearance space formed by the first annular bulge 7 to enable the end surface of the inner tube 4 to be in contact with the vertical end surface of the L-shaped structure, then tightly attaching the conical surface of the second annular bulge 8 to the conical bottom surface of the annular groove of the valve body 1, and finally clamping the first check ring 9 into a groove on the inner wall of the valve body 1 to enable the first check ring 9 to be abutted against the end surface, which is far away from the ball core 3, of the inner tube 4.

Through the cooperation of the triple limiting structures, the accurate positioning of the inner pipe 4 in the axial direction and the radial direction is realized while the structural compactness of the valve is ensured, the stability and the sealing reliability of the valve under the working conditions of high pressure, vibration and frequent opening and closing are effectively improved, and the valve is convenient to maintain and disassemble.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims (10)

1. A three-way ball valve, comprising:

a valve body (1) in which a horizontal passage (2) and a vertical passage are formed to be communicated with each other;

The ball core (3) is rotatably positioned at the joint of the horizontal channel (2) and the vertical channel and is provided with an L-shaped channel which is used for being communicated with the horizontal channel (2) and the vertical channel;

A rotatable inner pipe assembly is arranged in the valve body (1);

the rotatable inner tube assembly includes:

The inner pipe (4) is arranged in the horizontal channel (2) in a radial clearance fit manner;

A sealing structure (5) arranged in the gap between the fluid inlet end of the valve body (1) and the inner tube (4);

A rotation operation structure (6) for rotating the inner tube (4) relative to the valve body (1);

And the limiting structure is used for limiting the displacement of the inner tube (4) along the axial direction of the horizontal channel (2).

2. The three-way ball valve according to claim 1, wherein the sealing structure (5) comprises a sealing groove arranged on the inner wall of the valve body (1) and a lip seal arranged on the sealing groove, and the lip seal part of the lip seal is attached to the outer wall of the inner pipe (4).

3. The three-way ball valve according to claim 2, wherein the lip seal comprises a seal body, the lip seal portion is arranged on one side, close to the inner tube (4), of the seal body and is provided with a main seal lip (50) and an auxiliary seal lip (51), a V-shaped grease storage groove (55) is formed between the main seal lip (50) and the auxiliary seal lip (51), grease is filled in the V-shaped grease storage groove (55), a metal framework (52) is embedded in the seal body, and an elastic hollow metal ring (53) is embedded in the root of the main seal lip (50).

4. The three-way ball valve of claim 3, wherein the sealing body is L-shaped, the lip seal is connected to the inner periphery of the sealing body and forms a cavity with the sealing body, the end part of the cavity, which is close to the inner pipe (4), is provided with the metal skeleton (52), the metal skeleton (52) is an annular metal piece with an L-shaped cross section, the metal skeleton (52) is embedded on the inner wall, which is close to the cavity, of the sealing body, the end part, which is close to the inner pipe (4), of the main sealing lip (50) opposite to the auxiliary sealing lip (51), is provided with a second check ring (54) between the lip seal and the inner wall of the sealing groove of the valve body (1), and the end part, which is far away from the inner pipe (4), of the second check ring (54) opposite to the lip seal is provided.

5. The three-way ball valve according to claim 1, wherein the rotary operation structure (6) comprises a radial slot (61) formed in the valve body (1), a connecting portion (62) formed on the outer wall of the inner tube, and an operation member (60) connected to the connecting portion, and the operation member passes through the radial slot (61).

6. The three-way ball valve according to claim 5, wherein the operating member (60) comprises an operating rod (601), an operating head (602) and an operating connecting end (603) which are sequentially connected, the operating rod is arranged in a groove of the radial groove (61) and is in clearance fit with the groove walls on the two sides, the operating head is arranged outside the valve body (1), and the operating connecting end (603) is detachably connected with a connecting part (62) on the outer wall of the inner pipe (4).

7. The three-way ball valve according to claim 5, wherein the two ends of the radial slot (61) of the valve body (1) are arranged in arc-shaped fillets, the two ends of the radial slot (61) and the two side slot walls form a range limiting area, and the operating rod is limited to move in the range limiting area.

8. The three-way ball valve of claim 1, wherein the limiting structure comprises a first limiting matching structure formed by a first annular bulge (7) arranged on the inner wall of the valve body (1) and one end, close to the ball core (3), of the inner tube (4), a second limiting matching structure formed by a first check ring (9) detachably connected to the inner wall of the valve body (1) and one end, far away from the ball core (3), of the inner tube (4), and a third limiting matching structure formed by a second annular bulge (8) arranged on the outer wall of the inner tube (4) and one end, far away from the ball core (3), of the inner wall of the valve body (1) and an annular groove formed by the annular bulge and one end, far away from the ball core (3), of the inner tube (4), axial displacement and radial displacement are limited by the first limiting matching structure and the third limiting matching structure together, and axial displacement is restrained by the second limiting matching structure.

9. The three-way ball valve according to claim 8, wherein the first annular protrusion (7) is an annular structure with an L-shaped cross section, an annular clearance space is formed between the L-shaped annular structure and the inner wall of the valve body (1), the annular clearance space allows the inner tube to be accommodated in a nested manner, and the inner tube (4) is limited to move in a single axial direction in a direction approaching the ball core (3).

10. The three-way ball valve of claim 8, wherein the second annular protrusion (8) comprises a first matching surface and a second matching surface, the first matching surface is positioned on the periphery of the second annular protrusion (8), the second matching surface is positioned at one end, close to the direction of the ball core (3), of the second annular protrusion (8), the second matching surface is a conical surface, the bottom surface of the annular groove of the valve body (1) is a conical surface matched with the second matching surface, and the second matching surface is attached to the bottom surface of the annular groove of the valve body (1).