A Y-type two-way ball-passing tee and its use method

Abstract

The present invention relates to a Y-type two-way ball-passing tee and a method for using the same, comprising a Y-type oblique tee main body, an adjusting device arranged on the Y-type oblique tee main body, and a guiding device arranged on the Y-type oblique tee main body, wherein the Y-type oblique tee main body comprises a first branch pipe and a second branch pipe which are integrally connected and arranged at an angle, and the adjusting device is respectively arranged on the inlet outer peripheral surfaces of the first branch pipe and the second branch pipe; the guiding device comprises liner pipes which are respectively arranged in the first branch pipe and the second branch pipe and arranged along the length direction of the first branch pipe and the second branch pipe; the liner pipes are rotatably arranged in the first branch pipe and the second branch pipe. The liner pipe has the advantages of reasonable structural design and convenient operation and use, and not only has the function of opening a branch pipe for a main pipe, but also can realize two-way ball passing of the main pipe and the branch pipe, which greatly helps the detection and ball passing work in the pipe.

Description

Technical Field

[0001] The invention relates to the technical field of in-pipe detection and in-pipe cleaning of submarine pipelines, solid transport pipelines and the like, and in particular to a Y-type two-way ball-passing tee and a use method thereof. Background Art

[0002] Ball detection is an indispensable step in submarine oil and gas pipelines. It is an indispensable part of submarine pipeline integrity management. Its purpose is to: 1. Control pipeline inner wall corrosion and ensure safe production; 2. Extend pipeline service life and reduce maintenance costs; 3. Increase output and improve transportation efficiency. However, encountering submarine pipelines with diversions has brought great restrictions to ball passing. In the past, ball passing tees can only achieve one-way ball passing in terms of ball passing. If it is a main pipe ball passing, a grate must be added at the branch pipe outlet to allow the cleaning ball or detection ball to pass smoothly. In this way, the branch pipe system cannot perform cleaning or detection, and the same is true for branch pipe ball passing. This will result in two branches that can only detect one of them, while the other cannot detect the integrity of the submarine pipeline. As time goes by, this undetectable pipeline will inevitably cause huge losses and marine pollution when problems occur. The present invention is proposed based on this research background, and aims to provide a Y-type two-way ball passing tee with a simple structure, easy use, and the ability to achieve two-way ball passing of the main pipe and the branch pipe, and a method for using the same. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings existing in the pipeline detection in the prior art, and to provide a Y-type two-way ball-passing tee and a method for using the same, which has the advantages of reasonable structural design and convenient operation and use. In addition to having the function of opening a branch for the main pipe, the ordinary tee can also realize two-way ball passing for the main pipe and the branch pipe, which is of great help for the detection and ball passing work in the pipe.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A Y-type two-way ball-passing tee, the tee comprises a Y-type oblique tee main body, an adjusting device arranged on the Y-type oblique tee main body, and a guiding device arranged on the Y-type oblique tee main body, wherein the Y-type oblique tee main body comprises a first branch pipe and a second branch pipe that are integrally connected and arranged at an angle, one end of the first branch pipe is provided with a first branch pipe inlet, and one end of the second branch pipe is provided with a second branch pipe inlet; the other end of the first branch pipe is connected to the other end of the second branch pipe and forms a branch pipe outlet; the adjusting device is respectively arranged on the outer peripheral surface of the inlet of the first branch pipe and the second branch pipe; the guiding device comprises liner pipes respectively arranged in the first branch pipe and the second branch pipe and arranged along the length direction of the first branch pipe and the second branch pipe; the liner pipe is rotatably arranged in the first branch pipe and the second branch pipe; a plurality of small holes are arranged at one end of the liner pipe close to the branch pipe outlet, and a liner pipe gear matched with the adjusting device is arranged at one end of the liner pipe close to the branch pipe inlet; the adjusting device comprises a hand wheel, a box body, a box seat, a first A handwheel shaft, a first driven wheel shaft, a second handwheel shaft, a first driving gear, a first driven gear, a third driven gear, a second driving gear, a second driven gear, a fourth driven gear, and a second driven wheel shaft, wherein the first handwheel shaft and the second handwheel shaft are vertically arranged on the box body; the first driven wheel shaft is vertically connected to the box body and the box seat; the second driven wheel shaft is vertically connected and arranged on the box seat; the box seat is arranged at the bottom of the box body; the handwheel is installed on the first handwheel shaft and / or the second handwheel shaft; the first driving gear is arranged on the first handwheel shaft, and the second driven gear meshing with the first driving gear is arranged on the first driven wheel shaft; the second driving gear is arranged on the second handwheel shaft, and the first driven gear meshing with the second driving gear is also arranged below the second driven gear of the first driven wheel shaft; the third driven gear is also arranged below the first driven gear of the first driven wheel shaft, and the fourth driven gear meshing with the third driven gear is also arranged on the second driven wheel shaft;

[0006] A driving gear is also provided below the fourth driven gear of the second driven wheel shaft; the driving gear is meshedly connected with the liner gear so that the liner can rotate 360° inside the first branch pipe and / or the second branch pipe.

[0007] As a further optimization of the above solution, the adjustment device also includes a limiting device for limiting the rotation angle of the first hand wheel shaft and / or the second gear shaft.

[0008] As a further optimization of the above solution, the limiting device includes:

[0009] A limit mounting shell and a synchronous cam, wherein a central axis hole for mounting the first hand wheel shaft or the second hand wheel shaft is arranged in the center of the limit mounting shell, a mounting flange connected to the top of the box body is also arranged on the limit mounting shell, and an arc groove centered on the central axis hole and connected to the limit housing is also arranged on the top of the limit mounting shell; the synchronous cam is located in the limit mounting shell, and the synchronous cam is fixedly mounted on the first hand wheel shaft or the second hand wheel shaft, and rotates synchronously with the first hand wheel shaft or the second hand wheel shaft, and a limit pin capable of sliding in the arc groove is also arranged at one end of the synchronous cam.

[0010] As a further optimization of the above scheme, the first branch pipe of the Y-type oblique tee main body is arranged horizontally, and the second branch pipe is arranged at an angle of ≤30° with the first branch pipe; or the first branch pipe and the second branch pipe of the Y-type oblique tee main body are arranged symmetrically at an angle with the horizontal direction.

[0011] As a further optimization of the above solution, one end of the liner away from the liner gear is an inclined opening portion arranged obliquely; the structural dimensions of the inclined opening portion of the liner in the first branch pipe and the second branch pipe meet the following requirements:

[0012] After the liner in the first branch pipe rotates 180 degrees, the outer peripheral surface of the inclined opening of the liner in the first branch pipe can close the inclined opening of the liner in the second branch pipe;

[0013] Furthermore, after the liner in the second branch pipe is rotated 180 degrees, the outer peripheral surface of the inclined opening of the liner in the second branch pipe can close the inclined opening of the liner in the first branch pipe.

[0014] As a further optimization of the above solution, the outer peripheral surfaces of the end portions of the first branch pipe and the second branch pipe close to the branch pipe inlets are further provided with flange connecting portions connected to the pipeline to be inspected and / or cleaned.

[0015] As a further optimization of the above scheme, the handwheel is an annular operating part, and a mounting part that is adapted to the shape of the first handwheel shaft and / or the second handwheel shaft is arranged at the center of the annular operating part; or the handwheel is a cylindrical operating part, and the cylindrical operating part includes a flange fixedly arranged on the box body, and a cylindrical part integrally connected to the flange, an operating handle is arranged in the cylindrical part, and a mounting part that is adapted to the shape of the first handwheel shaft and / or the second handwheel shaft is arranged at the center of the operating handle; the operating handle is a cross operating handle or a straight operating handle.

[0016] As a further optimization of the above solution, a sealing ring and a sealing gland are further provided at the connection between the box seat and the main body of the Y-shaped oblique tee; the sealing ring is arranged in the sealing gland.

[0017] As a further optimization of the above scheme, an arc groove is further provided on the outer circumferential surface of the first handwheel shaft and / or the second handwheel shaft on the box body; an indication mark of the opening or closing direction is also provided on the end cross section of the liner; and confirmation marks for opening or closing are also provided at both ends of the groove in the arc groove; when the indication mark is located at the confirmation mark for opening, it indicates that the liner is in an open state; when the indication mark is located at the confirmation mark for closing, it indicates that the liner is in a closed state.

[0018] The method for using the Y-type two-way ball-passing tee of the present invention comprises the following steps:

[0019] 1) Check before use:

[0020] Before installation, check whether there are foreign objects inside the Y-type two-way ball tee, whether the coating is damaged, and whether there are any obstructions when turning the liner of the main pipe and the branch pipe with a torque wrench; check whether the flange connection of the first branch pipe and the second branch pipe is intact, and whether there are foreign objects on the sealing surface; whether the lifting points and lifting of the Y-type two-way ball tee are fully equipped and meet the lifting requirements; after the pre-use inspection is completed, proceed to step 2);

[0021] 2) Adjustment and passing the ball

[0022] Slowly lift the Y-type two-way ball-passing tee and align it with the pipe to be inspected and / or cleaned, then make flange connections. Only after completion can the ball be passed; the ball-passing device should reach at least 97% of the pipe inner diameter;

[0023] The hand wheel on the box body is rotated by external force to drive the second hand wheel shaft with the second driving gear to make synchronous circular motion with the hand wheel. The second driven gear, the first driven gear and the third driven gear are respectively installed on the first driven wheel shaft. When the second driving gear is meshed with the first driven gear, the second driven gear and the second hand wheel shaft are driven to rotate at the same time; at the same time, the third driven gear is meshed with the fourth driven gear, and the second driven shaft and the driving gear are rotated at the same time, wherein the driving gear is meshed with the liner gear on the liner, driving the liner to rotate, so as to adjust the direction of the ball passing on the second branch pipe;

[0024] By adopting the same means, the hand wheel on the box body is rotated by external force to drive the first hand wheel shaft with the first driving gear to make synchronous circular motion with the hand wheel, so as to adjust the ball passing direction on the first branch pipe;

[0025] During the process of adjusting the liner, the second driven gear meshes with the first driving gear to drive the first handwheel shaft to rotate. A limit device for limiting the rotation angle of the liner is installed on the first handwheel shaft and / or the second handwheel shaft, so that the liner can only rotate to a maximum angle of 180°; observe the opening or closing position determination mark, and stop turning the torque wrench after the limit ring moves 180° from the open position to the closed position, indicating that the liner inside has also rotated 180°.

[0026] The two-way ball-passing tee and the method of using the present invention have the following beneficial effects: not only can the common tee open a branch for the main pipe, but it can also realize two-way ball passing of the main pipe and the branch pipe, which is of great help for the detection and ball passing work in the pipe; specifically, it has a device for adjusting the direction; the direction can be adjusted so that the medium transportation of another pipe is not affected after the ball is passed; a system for adjusting the internal device needs to be set on the outside of the tee to ensure that the entire tee is sealed on the pipeline and no medium can flow out. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Attached Figure 1 It is a schematic diagram of the Y-type bidirectional ball-passing tee structure of the main body of the I-type Y-type oblique tee of the present invention.

[0028] Attached Figure 2 It is a schematic diagram of the Y-type bidirectional ball-passing tee structure of the main body of the II-type Y-type oblique tee of the present invention.

[0029] Attached Figure 3 It is a schematic cross-sectional structure diagram of the gear box at A in the Y-type bidirectional ball-passing tee of the II-type Y-type oblique tee main body of the present invention.

[0030] Attached Figure 4 For the present invention Figure 3 Schematic diagram of the gearbox structure at A in the middle.

[0031] Attached Figure 5 It is a structural schematic diagram of the cylindrical operating part of the Y-type two-way ball-passing tee of the present invention.

[0032] Attached Figure 6 It is a schematic diagram of the structure of the limit device of the Y-type two-way ball-passing tee of the present invention, taking the installation on the first handwheel shaft as an example. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-5 The Y-type bidirectional ball-passing tee and the use method thereof are described in detail.

[0034] A Y-type two-way ball-passing tee, the tee comprises a Y-type oblique tee main body 1, an adjusting device 2 arranged on the Y-type oblique tee main body, and a guiding device arranged on the Y-type oblique tee main body, wherein:

[0035] The Y-shaped oblique tee main body 1 comprises a first branch pipe 1-1 and a second branch pipe 1-2 which are integrally connected and arranged at an angle, one end of the first branch pipe is provided with a first branch pipe inlet, and one end of the second branch pipe is provided with a second branch pipe inlet; the other end of the first branch pipe is connected to the other end of the second branch pipe to form a branch pipe outlet; the regulating device is respectively arranged on the outer circumferential surface of the inlet of the first branch pipe and the second branch pipe;

[0036] The guide device comprises a liner 3 which is respectively arranged in the first branch pipe and the second branch pipe and arranged along the length direction of the first branch pipe and the second branch pipe; the liner is rotatably arranged in the first branch pipe and the second branch pipe; a plurality of small holes S are arranged at one end of the liner close to the branch pipe outlet, and a liner gear which cooperates with the adjustment device is arranged at one end of the liner close to the branch pipe inlet;

[0037] The adjusting device comprises a hand wheel 2-1, a box body 2-2, a box seat 2-3, a first hand wheel shaft 2-4, a first driven wheel shaft 2-5, a second hand wheel shaft 2-6, a first driving gear 2-7, a first driven gear 2-8, a third driven gear 2-9, a second driving gear 2-10, a second driven gear 2-11, a fourth driven gear 2-12, and a second driven wheel shaft 2-13, wherein the first hand wheel shaft and the second hand wheel shaft are vertically penetrated on the box body; the first driven wheel shaft is vertically connected to the box body and the box seat; the second driven wheel shaft is vertically connected and penetrated on the box seat; the box seat is provided The handwheel is arranged at the bottom of the box; the handwheel is installed on the first handwheel shaft and / or the second handwheel shaft; the first handwheel shaft is provided with a first driving gear, and the first driven wheel shaft is provided with a second driven gear meshing with the first driving gear; the second handwheel shaft is provided with a second driving gear, and the first driven wheel shaft is further provided with a first driven gear meshing with the second driving gear below the second driven gear; the first driven wheel shaft is further provided with a third driven gear below the first driven gear, and the second driven wheel shaft is further provided with a fourth driven gear meshing with the third driven gear;

[0038] A driving gear is also provided below the fourth driven gear of the second driven wheel shaft; the driving gear is meshedly connected with the liner gear so that the liner can rotate 360° inside the first branch pipe and / or the second branch pipe.

[0039] The adjusting device also includes a limiting device for limiting the rotation angle of the first hand wheel shaft and / or the second gear shaft.

[0040] The limit device includes: a limit installation shell 7 and a synchronous cam 8. A central axis hole for installing the first hand wheel shaft or the second hand wheel shaft is arranged in the center of the limit installation shell. A mounting flange connected to the top of the box body is also arranged on the limit installation shell. An arc groove 9 centered on the central axis hole and connected to the limit shell is also arranged on the top of the limit installation shell. The synchronous cam is located in the limit installation shell, and the synchronous cam is fixedly installed on the first hand wheel shaft or the second hand wheel shaft, and rotates synchronously with the first hand wheel shaft or the second hand wheel shaft. A limit pin 10 capable of sliding in the arc groove is also arranged at one end of the synchronous cam.

[0041] I-type Y-shaped oblique tee main body: the first branch pipe of the Y-shaped oblique tee main body is arranged horizontally, and the second branch pipe is arranged at an angle of ≤30° with the first branch pipe;

[0042] or:

[0043] Type II Y-type oblique tee main body: the first branch pipe and the second branch pipe of the Y-type oblique tee main body are arranged symmetrically at an angle to the horizontal direction.

[0044] One end of the liner away from the liner gear is an inclined opening arranged obliquely; the structural dimensions of the inclined opening of the liner in the first branch pipe and the second branch pipe meet the following requirements:

[0045] After the liner in the first branch pipe rotates 180 degrees, the outer peripheral surface of the inclined opening of the liner in the first branch pipe can close the inclined opening of the liner in the second branch pipe;

[0046] Furthermore, after the liner in the second branch pipe is rotated 180 degrees, the outer peripheral surface of the inclined opening of the liner in the second branch pipe can close the inclined opening of the liner in the first branch pipe.

[0047] The outer peripheral surfaces of the end portions of the first branch pipe and the second branch pipe close to the branch pipe inlet are also provided with flange connection portions L connected to the pipeline to be inspected and / or cleaned.

[0048] The handwheel is an annular operating part, and a mounting part that is adapted to the shape of the first handwheel shaft and / or the second handwheel shaft is arranged at the center of the annular operating part; or the handwheel is a cylindrical operating part, and the cylindrical operating part includes a flange 4 fixedly arranged on the box body, and a cylindrical part 5 integrally connected to the flange, an operating handle 6 is arranged in the cylindrical part, and a mounting part that is adapted to the shape of the first handwheel shaft and / or the second handwheel shaft is arranged at the center of the operating handle; the operating handle is a cross operating handle or a straight operating handle.

[0049] A sealing ring and a sealing gland are also provided at the connection between the box seat and the main body of the Y-shaped oblique tee; the sealing ring is arranged in the sealing gland.

[0050] An arc groove is also provided on the box body along the outer circumferential surface of the first handwheel shaft and / or the second handwheel shaft; an indication mark of the opening or closing direction is also provided on the end cross section of the liner; and confirmation marks for opening or closing are also provided at both ends of the groove in the arc groove; when the indication mark is located at the confirmation mark for opening, it indicates that the liner is in an open state; when the indication mark is located at the confirmation mark for closing, it indicates that the liner is in a closed state.

[0051] The method for using the Y-type two-way ball-passing tee of the present invention comprises the following steps:

[0052] 1) Check before use:

[0053] Before installation, check whether there are foreign objects inside the Y-type two-way ball tee, whether the coating is damaged, and whether there are any obstructions when turning the liner of the main pipe and the branch pipe with a torque wrench; check whether the flange connection of the first branch pipe and the second branch pipe is intact, and whether there are foreign objects on the sealing surface; whether the lifting points and lifting of the Y-type two-way ball tee are fully equipped and meet the lifting requirements; after the pre-use inspection is completed, proceed to step 2);

[0054] 2) Adjustment and passing the ball

[0055] Slowly lift the Y-type two-way ball-passing tee and align it with the pipe to be inspected and / or cleaned, then make flange connections. Only after completion can the ball be passed; the ball-passing device should reach at least 97% of the pipe inner diameter;

[0056] The hand wheel on the box body is rotated by external force to drive the second hand wheel shaft with the second driving gear to make synchronous circular motion with the hand wheel. The second driven gear, the first driven gear and the third driven gear are respectively installed on the first driven wheel shaft. When the second driving gear is meshed with the first driven gear, the second driven gear and the second hand wheel shaft are driven to rotate at the same time; at the same time, the third driven gear is meshed with the fourth driven gear, and the second driven shaft and the driving gear are rotated at the same time, wherein the driving gear is meshed with the liner gear on the liner, driving the liner to rotate, so as to adjust the direction of the ball passing on the second branch pipe;

[0057] By adopting the same means, the hand wheel on the box body is rotated by external force to drive the first hand wheel shaft with the first driving gear to make synchronous circular motion with the hand wheel, so as to adjust the ball passing direction on the first branch pipe;

[0058] During the process of adjusting the liner, the second driven gear meshes with the first driving gear to drive the first handwheel shaft to rotate. A limit device for limiting the rotation angle of the liner is installed on the first handwheel shaft and / or the second handwheel shaft, so that the liner can only rotate to a maximum angle of 180°; observe the opening or closing position determination mark, and stop turning the torque wrench after the limit ring moves 180° from the open position to the closed position, indicating that the liner inside has also rotated 180°.

[0059] The above description of the embodiments is to facilitate the understanding and application of the present invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the embodiments herein, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A Y-type two-way ball-passing tee, characterized by: The tee comprises a Y-shaped inclined tee main body (1), an adjusting device (2) arranged on the Y-shaped inclined tee main body, and a guiding device arranged on the Y-shaped inclined tee main body, wherein the Y-shaped inclined tee main body (1) comprises a first branch pipe (1-1) and a second branch pipe (1-2) which are integrally connected and arranged at an angle, one end of the first branch pipe is provided with a first branch pipe inlet, and one end of the second branch pipe is provided with a second branch pipe inlet; the other end of the first branch pipe is connected to the other end of the second branch pipe and forms a branch pipe outlet; the adjusting device is respectively arranged on the outer circumferential surface of the inlet of the first branch pipe and the second branch pipe; the guiding device comprises a liner (3) respectively arranged in the first branch pipe and the second branch pipe and arranged along the length direction of the first branch pipe and the second branch pipe; the liner is rotatably arranged in the first branch pipe and the second branch pipe; a plurality of small holes (S) are arranged at one end of the liner close to the branch pipe outlet, and a liner gear matching the adjusting device is arranged at one end of the liner close to the branch pipe inlet; The adjusting device comprises a hand wheel (2-1), a box body (2-2), a box seat (2-3), a first hand wheel shaft (2-4), a first driven wheel shaft (2-5), a second hand wheel shaft (2-6), a first driving gear (2-7), a first driven gear (2-8), a third driven gear (2-9), a second driving gear (2-10), a second driven gear (2-11), a fourth driven gear (2-12), and a second driven wheel shaft (2-13), wherein the first hand wheel shaft and the second hand wheel shaft are vertically arranged on the box body; the first driven wheel shaft is vertically connected to the box body and the box seat; the second driven wheel shaft is vertically connected to the box body and the box seat; The connection is arranged on the box seat; the box seat is arranged at the bottom of the box body; the hand wheel is installed on the first hand wheel shaft and / or the second hand wheel shaft; the first hand wheel shaft is provided with a first driving gear, and the first driven wheel shaft is provided with a second driven gear meshing with the first driving gear; the second hand wheel shaft is provided with a second driving gear, and the first driven gear meshing with the second driving gear is also provided below the second driven gear of the first driven wheel shaft; the third driven gear is also provided below the first driven gear of the first driven wheel shaft, and the second driven wheel shaft is also provided with a fourth driven gear meshing with the third driven gear; A driving gear is also provided below the fourth driven gear of the second driven wheel shaft; the driving gear is meshedly connected with the liner gear so that the liner can rotate 360° inside the first branch pipe and / or the second branch pipe; the adjusting device also includes a limiting device for limiting the rotation angle of the first hand wheel shaft and / or the second gear shaft; the limiting device includes: a limiting installation shell (7) and a synchronous cam (8); a central axis hole for installing the first hand wheel shaft or the second hand wheel shaft is provided in the center of the limiting installation shell; a mounting flange connected to the top of the box body is also provided on the limiting installation shell; an arc groove (9) centered on the central axis hole and connected to the limiting shell is also provided on the top of the limiting installation shell;The synchronous cam is located in a limit installation housing, and the synchronous cam is fixedly installed on the first hand wheel shaft or the second hand wheel shaft, and rotates synchronously with the first hand wheel shaft or the second hand wheel shaft. One end of the synchronous cam is also provided with a limit pin (10) that can slide in the arc groove; the first branch pipe of the Y-type oblique tee main body is arranged horizontally, and the second branch pipe is arranged at an angle of ≤30° with the first branch pipe; or the first branch pipe and the second branch pipe of the Y-type oblique tee main body are symmetrically arranged at an angle with the horizontal direction; the hand The wheel is an annular operating part, and a mounting part matching the shape of the first handwheel shaft and / or the second handwheel shaft is arranged at the center of the annular operating part; or the handwheel is a cylindrical operating part, and the cylindrical operating part includes a flange (4) fixedly arranged on the box body, and a cylindrical part (5) integrally connected with the flange, and an operating handle (6) is arranged in the cylindrical part, and a mounting part matching the shape of the first handwheel shaft and / or the second handwheel shaft is arranged at the center of the operating handle; the operating handle is a cross operating handle or a straight operating handle. ; 2. A Y-type two-way ball-passing tee according to claim 1, characterized in that: One end of the liner away from the liner gear is an inclined opening portion that is arranged obliquely; the structural dimensions of the inclined opening portions of the liners in the first branch and the second branch satisfy: after the liner in the first branch rotates 180 degrees, the outer peripheral surface of the inclined opening portion of the liner in the first branch can close the inclined opening portion of the liner in the second branch; and, after the liner in the second branch rotates 180 degrees, the outer peripheral surface of the inclined opening portion of the liner in the second branch can close the inclined opening portion of the liner in the first branch.

3. A Y-type two-way ball-passing tee according to claim 2, characterized in that: The outer peripheral surfaces of the end portions of the first branch pipe and the second branch pipe close to the branch pipe inlet are also provided with flange connecting portions (L) connected to the pipeline to be inspected and / or cleaned.

4. A Y-type two-way ball-passing tee according to claim 3, characterized in that: A sealing ring and a sealing gland are also provided at the connection between the box seat and the main body of the Y-shaped oblique tee; the sealing ring is arranged in the sealing gland.

5. A Y-type two-way ball-passing tee according to claim 4, characterized in that: An indication mark for the opening or closing direction is also provided on the central outer peripheral surface of the arc groove; confirmation marks for opening or closing are also provided at both ends of the arc groove; when the indication mark is located at the confirmation mark for opening, it indicates that the liner is in an open state; when the indication mark is located at the confirmation mark for closing, it indicates that the liner is in a closed state.

6. A method for using a Y-type two-way ball-passing tee according to claim 5, characterized in that: The method of use includes the following steps: 1) Inspection before use: Before installation, check whether there are foreign objects inside the Y-type two-way ball tee, whether the coating is damaged, and whether there are any obstructions when turning the liner of the main pipe and the branch pipe with a torque wrench; check whether the flange connection between the first branch pipe and the second branch pipe is intact, and whether there are foreign objects on the sealing surface; check whether the lifting points and lifting of the Y-type two-way ball tee are fully equipped and meet the lifting requirements; after the pre-use inspection is completed, proceed to step 2); 2) Adjust and pass the ball to slowly lift the Y-type two-way ball tee and align it with the pipeline to be inspected and / or cleaned, and then make a flange connection. After completion, the ball can be passed; the ball passing device must reach at least 97% of the inner diameter of the pipe; The handwheel on the housing is rotated by external force to drive the second handwheel shaft with the second driving gear to make synchronous circular motion with the handwheel. The second driven gear, the first driven gear and the third driven gear are respectively installed on the first driven wheel shaft. When the second driving gear is meshed with the first driven gear, the second driven gear and the second handwheel shaft are driven to rotate at the same time; at the same time, the third driven gear is meshed with the fourth driven gear, and the second driven shaft and the driving gear are rotated at the same time, wherein the driving gear is meshed with the liner gear on the liner to drive the liner to rotate, thereby adjusting the direction of the ball passing on the second branch pipe; adopting the same means, the handwheel on the housing is rotated by external force to drive the first handwheel shaft with the first driving gear to make synchronous circular motion with the handwheel, thereby adjusting the direction of the ball passing on the first branch pipe; During the process of adjusting the liner, the second driven gear meshes with the first driving gear to drive the first handwheel shaft to rotate. A limit device for limiting the rotation angle of the liner is installed on the first handwheel shaft and / or the second handwheel shaft, so that the liner can only rotate to a maximum angle of 180°; observe the opening or closing position determination mark, and stop turning the torque wrench after the limit ring moves 180° from the open position to the closed position, indicating that the liner inside has also rotated 180°.

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