Valve sealing structure and sealing method

Abstract

The invention relates to the technical field of valve sealing, in particular to a valve sealing structure and further relates to a valve sealing method.The valve sealing structure comprises a valve body, sealing rings are arranged in the two ends of the valve body, connecting pipelines are movably arranged at the two ends of the valve body, and positioning rings are arranged outside the connecting pipelines; a mounting cylinder is arranged outside the valve body, a control assembly used for controlling opening and closing of the valve body is arranged in the mounting cylinder, the valve rod is rotated in the reverse direction, meanwhile, the ball valve can rotate, and therefore the valve body is closed, and the situation that the valve body still works when a connecting pipeline is disassembled is prevented; when the valve rod rotates reversely, a circular gear and a gear ring also rotate reversely, so that an extrusion part in a rotating ring is separated from a contact part, a positioning column at the bottom of the extrusion part is separated from a positioning hole in a guide groove under the action of a first spring, and then the connecting pipeline can be quickly taken out; and the situation that a plurality of workers are needed to disassemble the connecting pipeline is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of valve sealing, in particular to a valve sealing structure, and in particular to a valve sealing method. Background Art

[0002] A valve is a device used to control media such as gas, liquid, and gas or liquid containing solid powder in various pipelines and equipment. A valve is usually composed of a valve body, a valve cover, a valve seat, an opening and closing member, a driving mechanism, a seal, and fasteners. The control function of the valve is achieved by changing the size of the flow area by driving the opening and closing member to rise and fall, slide, swing, or rotate by a driving mechanism or fluid.

[0003] Chinese patent authorization announcement number CN221800907U discloses a valve pipeline sealing structure, which relates to the technical field of pipeline control valves, including a valve, a pipeline 1 is detachably installed on the left side of the valve, a pipeline 2 is detachably installed on the right side of the valve, and a fixing unit is provided at the connection points on both sides of the valve, and a sealing unit is provided inside the fixing unit. The utility model is provided with a rubber sealing ring to engage with a sealing groove 1, and the connection and extrusion of the pipeline cause the rubber sealing ring to expand, thereby achieving the effect of gap sealing, and the rubber ring on the outside of the pipeline is engaged with the inside of the sealing groove 2, further sealing the outer connection gap, and providing a positioning column to contact the inside of the positioning hole when the pipeline is connected to the valve, and providing a reset spring to use its elastic driving force to promote the connection and fixation between the valve and the pipeline, and providing an extrusion plate to drive the piston column to cause the positioning column to move up and break away from the fixation of the positioning hole, thereby achieving the effect of easy disassembly.

[0004] The above-mentioned device utilizes multiple return springs to cooperate with the positioning column to seal the pipeline. However, when the pipeline needs to be removed and replaced, the positioning column must be lifted and moved upward to make the positioning column break away from the contact with the positioning hole. The pipeline can be removed and replaced only after all the positioning columns break away from the contact with the positioning hole. However, since there are multiple positioning columns and the staff can only lift two positioning columns at most at a time, multiple staff members need to work together to complete the work when removing and replacing the pipeline, resulting in unnecessary labor added when removing and replacing the pipeline. Summary of the invention

[0005] In view of the above problem, a valve sealing structure is provided, which can close the valve body by rotating the valve stem in the opposite direction and the ball valve will also rotate at the same time to prevent the valve body from still working when the connecting pipe is disassembled. When the valve stem rotates in the opposite direction, the circular gear and the gear ring will also rotate in the opposite direction, so that the extrusion part inside the swivel will be separated from the contact with the interference part. At this time, the positioning column at the bottom of the extrusion part will be separated from the contact with the positioning hole inside the guide groove under the action of the first spring, and then the connecting pipe can be quickly taken out, avoiding the need for multiple workers to disassemble the connecting pipe.

[0006] To solve the problems of the prior art, the present invention provides a valve sealing structure and a sealing method, including a valve body, sealing rings are provided inside both ends of the valve body, connecting pipes are movably provided at both ends of the valve body, a positioning ring is provided outside the connecting pipe, a mounting cylinder is provided outside the valve body, a control component for controlling the opening and closing of the valve body is provided inside the mounting cylinder, a swivel is rotatably provided outside the valve body, a gear ring is provided outside the swivel, a plurality of extrusion parts are provided on the inner wall of the swivel, a plurality of positioning cylinders are provided outside the valve body, and the number of the positioning cylinders is consistent with the number of the extrusion parts, and a limiting component for limiting the connecting pipe is provided inside the positioning cylinder.

[0007] Preferably, the limiting assembly comprises a positioning column movably arranged inside the positioning cylinder, and the top of the positioning column is provided with an interference portion cooperating with the extrusion portion.

[0008] Preferably, a first spring is sleeved on the exterior of the positioning column, one end of the first spring is connected to the top of the positioning cylinder, and the other end of the first spring is connected to the bottom of the abutment portion.

[0009] Preferably, a plurality of guide grooves for facilitating quick connection between the valve body and the connecting pipe are provided on the outside of the positioning ring, and a positioning groove matched with the positioning column is provided inside the guiding groove.

[0010] Preferably, the control assembly comprises a valve stem rotatably arranged inside the mounting cylinder, a first bevel gear is arranged outside the valve stem, and a bottom of the valve stem extends to the inside of the valve body and is provided with a ball valve.

[0011] Preferably, a rotating rod is rotatably arranged inside the mounting tube, one end of the rotating rod is provided with a second bevel gear meshingly connected to the first bevel gear, and the other end of the rotating rod is provided with a circular gear meshingly connected to a gear ring.

[0012] Preferably, a positioning assembly for preventing the ball valve from rotating at will is provided on the top of the valve stem, and the positioning assembly includes a pressing block movably arranged inside the valve stem, a positioning pin is provided at the bottom of the pressing block, and a plurality of positioning holes matching the positioning pins are opened on the upper surface of the mounting tube.

[0013] Preferably, pull rods are provided on the top of both sides of the lower pressure block, the tops of the two pull rods extend to the outside of the valve stem, and a rotating block for rotating the valve stem is provided between the two pull rods, and a second spring is sleeved on the outside of the pull rod, one end of the second spring is connected to the valve stem, and the other end of the second spring is connected to the lower pressure block.

[0014] Preferably, a plurality of L-shaped limiting rods are arranged outside the valve body, and an arc-shaped limiting groove for the L-shaped limiting rods to move is opened on the side wall of the rotating ring.

[0015] A valve sealing method comprises the following steps:

[0016] S1: When it is necessary to seal the connecting pipe, first slowly insert the conical end of the connecting pipe into the valve body. When inserting, the guide groove can be aligned with the positioning cylinder to facilitate the connection between the connecting pipe and the valve body. When the connecting pipe is inserted into the valve body, it will slowly squeeze the sealing ring until it is tightly in contact with the sealing ring to achieve a sealing effect.

[0017] S2: When the connecting pipe is in tight contact with the ball valve, the staff needs to pull the rotating block upwards to further drive the pressing block upwards, so that the positioning pin is away from the positioning hole on the upper surface of the mounting tube. At this time, the rotating block can be rotated to drive the valve stem to rotate, and further drive the ball valve to rotate, so that the valve body is opened. The positioning pin can be used to prevent the valve stem from rotating at will, so as to avoid the ball valve being closed when the valve body is working.

[0018] S3: When the valve stem rotates, the first bevel gear will also be driven to rotate, and the first bevel gear will be used to drive the second bevel gear and the rotating rod to rotate. At the same time, the circular gear at one end of the rotating rod will also rotate, further driving the gear ring and the rotating ring to rotate. When the rotating ring rotates, the extrusion part inside it will also be driven to rotate. When the extrusion part rotates, it will squeeze the resistance part. After being squeezed, the resistance part will drive the positioning column to move, so that the positioning column is inserted into the positioning groove inside the positioning ring to prevent the connecting pipe and the valve body from being separated during operation.

[0019] S4: When the connecting pipe needs to be disassembled, it is only necessary to rotate the valve stem in the opposite direction. At the same time, the ball valve will also rotate to close the valve body to prevent the valve body from still working when the connecting pipe is disassembled. When the valve stem rotates in the opposite direction, the circular gear and the gear ring will also rotate in the opposite direction, so that the extrusion part inside the swivel will be separated from the contact with the resistance part. At this time, the positioning column at the bottom of the extrusion part will be separated from the contact with the positioning hole inside the guide groove under the action of the first spring. After that, the connecting pipe can be quickly taken out, avoiding the need for multiple workers to disassemble the connecting pipe.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. When it is necessary to disassemble the connecting pipe, just rotate the valve stem in the opposite direction. At the same time, the ball valve will also rotate to close the valve body to prevent the valve body from still working when the connecting pipe is disassembled. When the valve stem rotates in the opposite direction, the circular gear and the gear ring will also rotate in the opposite direction, so that the extrusion part inside the swivel will be separated from the contact with the resistance part. At this time, the positioning column at the bottom of the extrusion part will be separated from the contact with the positioning hole inside the guide groove under the action of the first spring. After that, the connecting pipe can be quickly taken out, avoiding the need for multiple workers to disassemble the connecting pipe.

[0022] 2. By pulling the rotating block upward, the lower pressure block is further driven to move upward, so that the positioning pin is away from the positioning hole on the upper surface of the mounting tube. At this time, the rotating block can be rotated to drive the valve stem to rotate, and further drive the ball valve to rotate, so that the valve body opens. The positioning pin can prevent the valve stem from rotating at will, and prevent the ball valve from closing when the valve body is working.

[0023] 3. Through the rotation of the ball valve, the opening and closing of the valve body can be accurately controlled. When the connecting pipe needs to be installed, the ball valve is opened to ensure the normal operation of the connecting pipe and the valve body. When the connecting pipe needs to be disassembled, the ball valve is closed, which can prevent the valve body from leaking when disassembling the connecting pipe, and after the valve body is closed, the connecting pipe can be disassembled without other operations, simplifying the process of disassembling the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The invention is a schematic diagram of the overall structure of a valve sealing structure and a sealing method.

[0025] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0026] Figure 3 The invention is a structural diagram of a valve body and a connecting pipe in a valve sealing structure.

[0027] Figure 4 The present invention is a structural schematic diagram of a positioning ring in a valve sealing structure.

[0028] Figure 5 The present invention is a schematic diagram of the internal structure of a positioning cylinder in a valve sealing structure.

[0029] Figure 6 It is a structural schematic diagram of a ball valve in a valve sealing structure.

[0030] Figure 7 This is a schematic diagram of the structure of the positioning pin in the valve sealing structure.

[0031] Figure 8 The invention is a structural schematic diagram of a valve sealing structure swivel and an extrusion part.

[0032] Fig. 9 The invention is a structural schematic diagram of an arc-shaped limit groove of a valve sealing structure.

[0033] Fig.10 It is a structural schematic diagram of a valve sealing structure when the valve body is closed.

[0034] The numbers in the figure are: 1. valve body; 2. arc-shaped limit groove; 3. gear ring; 4. connecting pipe; 5. circular gear; 6. rotating rod; 7. mounting cylinder; 8. rotating ring; 9. positioning ring; 10. extrusion part; 11. positioning cylinder; 12. L-shaped limit rod; 13. sealing ring; 14. interference part; 15. first spring; 16. positioning column; 17. ball valve; 18. valve stem; 19. first bevel gear; 20. second bevel gear; 21. positioning pin; 22. lower pressure block; 23. second spring; 24. pull rod; 25. rotating block; 26. guide groove. DETAILED DESCRIPTION

[0035] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] like Figures 1 to 10 As shown, the present invention provides:

[0037] A valve sealing structure and a sealing method, comprising a valve body 1, sealing rings 13 are arranged inside both ends of the valve body 1, connecting pipes 4 are movably arranged at both ends of the valve body 1, a positioning ring 9 is arranged outside the connecting pipe 4, a mounting cylinder 7 is arranged outside the valve body 1, a control component for controlling the opening and closing of the valve body 1 is arranged inside the mounting cylinder 7, a swivel 8 is rotatably arranged outside the valve body 1, a gear ring 3 is arranged outside the swivel 8, a plurality of extrusion parts 10 are arranged on the inner wall of the swivel 8, a plurality of positioning cylinders 11 are arranged outside the valve body 1, and the number of the positioning cylinders 11 is consistent with the number of the extrusion parts 10, and a limiting component for limiting the connecting pipe 4 is arranged inside the positioning cylinder 11.

[0038] The conical end of the connecting pipe 4 is slowly inserted into the interior of the valve body 1. The connecting pipe 4 will slowly squeeze the sealing ring 13 when entering the interior of the valve body 1 until it is tightly in contact with the sealing ring 13 to achieve a sealing effect. Then, the limiting component is used to limit the connecting pipe 4 to prevent the connecting pipe 4 from being out of contact with the valve body 1 when the valve body 1 is working.

[0039] like Figure 5 As shown, the limiting assembly includes a positioning column 16 movably arranged inside the positioning cylinder 11 , and a resisting portion 14 cooperating with the extruding portion 10 is arranged on the top of the positioning column 16 .

[0040] The pressing part 10 is used to press the abutting part 14 , and the abutting part 14 drives the positioning column 16 to move after being pressed, so that the positioning column 16 is inserted into the positioning groove inside the positioning ring 9 to prevent the connecting pipe 4 and the valve body 1 from being separated during operation.

[0041] like Figure 5 As shown, the first spring 15 is sleeved on the exterior of the positioning column 16 , one end of the first spring 15 is connected to the top of the positioning tube 11 , and the other end of the first spring 15 is connected to the bottom of the abutment portion 14 .

[0042] The first spring 15 can be used to make the positioning column 16 disengage from the contact with the positioning hole inside the guide groove 26, and then the connecting pipe 4 can be quickly taken out, avoiding the need for multiple workers to disassemble the connecting pipe 4.

[0043] like Figure 4 As shown, a plurality of guide grooves 26 for facilitating quick connection between the valve body 1 and the connecting pipe 4 are provided on the outside of the positioning ring 9 , and positioning grooves adapted to the positioning posts 16 are provided inside the guiding grooves 26 .

[0044] By accurately aligning the guide groove 26 with the positioning cylinder 11, the installation process of connecting the pipeline 4 and the valve body 1 is facilitated. Not only the efficiency of the connection is improved, but also the accuracy and reliability of the connection are ensured, thereby providing great convenience for operators during installation and maintenance.

[0045] like Figure 6 As shown, the control assembly includes a valve stem 18 rotatably disposed inside the mounting cylinder 7 , a first bevel gear 19 is disposed outside the valve stem 18 , and the bottom of the valve stem 18 extends to the inside of the valve body 1 and is provided with a ball valve 17 .

[0046] By rotating the ball valve 17, the opening and closing of the valve body 1 can be accurately controlled. When the connecting pipe 4 needs to be installed, the ball valve 17 is opened to ensure the normal operation of the connecting pipe 4 and the valve body 1. When the connecting pipe 4 needs to be disassembled, the ball valve 17 is closed, which can prevent the valve body 1 from leaking when the connecting pipe 4 is disassembled, and after the valve body 1 is closed, the connecting pipe 4 can be disassembled without other operations, thereby simplifying the process of disassembling the pipe.

[0047] like Figure 7 As shown, a rotating rod 6 is rotatably arranged inside the mounting tube 7, one end of the rotating rod 6 is provided with a second bevel gear 20 meshingly connected to the first bevel gear 19, and the other end of the rotating rod 6 is provided with a circular gear 5 meshingly connected to the gear ring 3.

[0048] The first bevel gear 19 is used to drive the second bevel gear 20 and the rotating rod 6 to rotate, and at the same time, the circular gear 5 at one end of the rotating rod 6 will also rotate, further driving the gear ring 3 and the rotating ring 8 to rotate. When the rotating ring 8 rotates, the extrusion part 10 inside it will also be driven to rotate, and the extrusion part 10 will squeeze the interference part 14 when rotating.

[0049] like Figure 7 As shown, a positioning assembly for preventing the ball valve 17 from rotating at will is arranged at the top of the valve stem 18, and the positioning assembly includes a pressing block 22 movably arranged inside the valve stem 18, a positioning pin 21 is arranged at the bottom of the pressing block 22, and a plurality of positioning holes matched with the positioning pin 21 are opened on the upper surface of the mounting tube 7.

[0050] By inserting the positioning pin 21 into the positioning hole on the upper surface of the mounting tube 7 , the valve stem 18 can be effectively prevented from rotating randomly, thereby ensuring that the ball valve 17 is closed when the valve body 1 is working.

[0051] like Figure 7 As shown, pull rods 24 are provided on the top of both sides of the lower pressure block 22, the tops of the two pull rods 24 extend to the outside of the valve stem 18, and a rotating block 25 for rotating the valve stem 18 is provided between the two pull rods 24, and a second spring 23 is sleeved on the outside of the pull rod 24, one end of the second spring 23 is connected to the valve stem 18, and the other end of the second spring 23 is connected to the lower pressure block 22.

[0052] By pulling the rotating block 25 upward, the pressing block 22 is further driven to move upward, so that the positioning pin 21 is away from the positioning hole on the upper surface of the mounting tube 7. At this time, the rotating block 25 can be rotated to drive the valve stem 18 to rotate, and further drive the ball valve 17 to rotate, so that the valve body 1 is opened.

[0053] like Fig. 9 As shown, a plurality of L-shaped limiting rods 12 are arranged outside the valve body 1, and an arc-shaped limiting groove 2 for the L-shaped limiting rods 12 to move is opened on the side wall of the swivel 8.

[0054] The L-shaped limit rod 12 moves in the arc-shaped limit groove 2. When the L-shaped limit rod 12 hits one end of the arc-shaped limit groove 2, the extrusion portion 10 just hits the interference portion 14, preventing the swivel 8 from rotating too much or too little, thereby causing the extrusion portion 10 to fail to hit the interference portion 14.

[0055] A valve sealing method comprises the following steps:

[0056] S1: When it is necessary to seal the connecting pipe 4, first slowly insert the conical end of the connecting pipe 4 into the interior of the valve body 1. When inserting, the guide groove 26 can be aligned with the positioning cylinder 11 to facilitate the connection between the connecting pipe 4 and the valve body 1. When the connecting pipe 4 is inside the valve body 1, it will slowly squeeze the sealing ring 13 until it is tightly in contact with the sealing ring 13 to achieve a sealing effect.

[0057] S2: When the connecting pipe 4 is in tight contact with the ball valve 17, since the ball valve 17 is closed at this time, the staff needs to pull the rotating block 25 upward to further drive the pressing block 22 to move upward, so that the positioning pin 21 is away from the positioning hole on the upper surface of the mounting tube 7. At this time, the rotating block 25 can be rotated to drive the valve stem 18 to rotate, and further drive the ball valve 17 to rotate, so that the valve body 1 is opened. The positioning pin 21 can prevent the valve stem 18 from rotating at will, and avoid the ball valve 17 from closing when the valve body 1 is working.

[0058] S3: When the valve stem 18 rotates, it will also drive the first bevel gear 19 to rotate. The first bevel gear 19 will drive the second bevel gear 20 and the rotating rod 6 to rotate. At the same time, the circular gear 5 at one end of the rotating rod 6 will also rotate, further driving the gear ring 3 and the rotating ring 8 to rotate. When the rotating ring 8 rotates, it will also drive the extrusion part 10 inside it to rotate. When the extrusion part 10 rotates, it will squeeze the resistance part 14. After being squeezed, the resistance part 14 will drive the positioning column 16 to move, so that the positioning column 16 is inserted into the positioning groove inside the positioning ring 9 to prevent the connecting pipe 4 from being separated from the valve body 1 during operation.

[0059] S4: When the connecting pipe 4 needs to be disassembled, it is only necessary to rotate the valve stem 18 in the opposite direction. At the same time, the ball valve 17 will also rotate to close the valve body 1 to prevent the valve body 1 from still working when the connecting pipe 4 is disassembled. When the valve stem 18 rotates in the opposite direction, the circular gear 5 and the gear ring 3 will also rotate in the opposite direction, so that the extrusion part 10 inside the swivel 8 is separated from the contact with the interference part 14. At this time, the positioning column 16 at the bottom of the extrusion part 10 is separated from the contact with the positioning hole inside the guide groove 26 under the action of the first spring 15. After that, the connecting pipe 4 can be quickly taken out, avoiding the need for multiple workers to disassemble the connecting pipe 4.

[0060] The above embodiments only express a valve sealing structure and sealing method or several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

[0061] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

Claims

1. A valve sealing structure, characterized in that: The invention comprises a valve body (1), wherein both ends of the valve body (1) are internally provided with sealing rings (13), both ends of the valve body (1) are movably provided with connecting pipes (4), the outside of the connecting pipes (4) is provided with positioning rings (9), the outside of the valve body (1) is provided with a mounting cylinder (7), the inside of the mounting cylinder (7) is provided with a control component for controlling the opening and closing of the valve body (1), the outside of the valve body (1) is provided with a rotating ring (8), the outside of the rotating ring (8) is provided with a gear ring (3), the inner wall of the rotating ring (8) is provided with a plurality of extrusion parts (10), the outside of the valve body (1) is provided with a plurality of positioning cylinders (11), and the number of the positioning cylinders (11) is consistent with the number of the extrusion parts (10), and the inside of the positioning cylinder (11) is provided with a limiting component for limiting the connecting pipe (4).

2. A valve sealing structure according to claim 1, characterized in that: The limiting assembly comprises a positioning column (16) movably arranged inside the positioning cylinder (11), and a resisting portion (14) cooperating with the extrusion portion (10) is arranged on the top of the positioning column (16).

3. A valve sealing structure according to claim 2, characterized in that: The first spring (15) is sleeved on the outside of the positioning column (16), one end of the first spring (15) is connected to the top of the positioning cylinder (11), and the other end of the first spring (15) is connected to the bottom of the abutment portion (14).

4. A valve sealing structure according to claim 1, characterized in that: The exterior of the positioning ring (9) is provided with a plurality of guide grooves (26) for facilitating quick connection between the valve body (1) and the connecting pipe (4), and the interior of the guide groove (26) is provided with a positioning groove matched with the positioning column (16).

5. A valve sealing structure according to claim 1, characterized in that: The control assembly comprises a valve stem (18) rotatably arranged inside a mounting cylinder (7), a first bevel gear (19) being arranged outside the valve stem (18), and a bottom of the valve stem (18) extending into the interior of a valve body (1) and being provided with a ball valve (17).

6. A valve sealing structure according to claim 5, characterized in that: A rotating rod (6) is rotatably arranged inside the mounting cylinder (7), one end of the rotating rod (6) is provided with a second bevel gear (20) meshingly connected to the first bevel gear (19), and the other end of the rotating rod (6) is provided with a circular gear (5) meshingly connected to the gear ring (3).

7. A valve sealing structure according to claim 5, characterized in that: A positioning assembly for preventing the ball valve (17) from rotating at will is arranged at the top of the valve stem (18), and the positioning assembly comprises a lower pressing block (22) movably arranged inside the valve stem (18), a positioning pin (21) is arranged at the bottom of the lower pressing block (22), and a plurality of positioning holes matched with the positioning pin (21) are opened on the upper surface of the mounting tube (7).

8. A valve sealing structure according to claim 7, characterized in that: Pull rods (24) are provided at the tops of both sides of the lower pressure block (22), the tops of the two pull rods (24) extend to the outside of the valve stem (18), and a rotating block (25) for rotating the valve stem (18) is provided between the two pull rods (24), and a second spring (23) is sleeved on the outside of the pull rod (24), one end of the second spring (23) is connected to the valve stem (18), and the other end of the second spring (23) is connected to the lower pressure block (22).

9. A valve sealing structure according to claim 1, characterized in that: A plurality of L-shaped limiting rods (12) are arranged outside the valve body (1), and an arc-shaped limiting groove (2) for the L-shaped limiting rods (12) to move is opened on the side wall of the rotating ring (8).

10. A valve sealing method according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: When it is necessary to seal the connecting pipe (4), firstly, the conical end of the connecting pipe (4) is slowly inserted into the interior of the valve body (1). During the insertion, the guide groove (26) can be aligned with the positioning cylinder (11), so as to facilitate the connection between the connecting pipe (4) and the valve body (1). When the connecting pipe (4) is inserted into the interior of the valve body (1), it will slowly squeeze the sealing ring (13) until it is tightly in contact with the sealing ring (13) to achieve a sealing effect. S2: When the connecting pipe (4) is in tight contact with the ball valve (17), since the ball valve (17) is closed at this time, the staff needs to pull the rotating block (25) upwards, further driving the lower pressing block (22) to move upwards, so that the positioning pin (21) is away from the positioning hole on the upper surface of the mounting tube (7). At this time, the rotating block (25) can be rotated to drive the valve stem (18) to rotate, and further drive the ball valve (17) to rotate, so that the valve body (1) is opened. The positioning pin (21) can prevent the valve stem (18) from rotating at will, thereby preventing the ball valve (17) from closing when the valve body (1) is working. S3: When the valve stem (18) rotates, the first bevel gear (19) is also driven to rotate. The first bevel gear (19) drives the second bevel gear (20) and the rotating rod (6) to rotate. At the same time, the circular gear (5) at one end of the rotating rod (6) is also rotated, further driving the gear ring (3) and the rotating ring (8) to rotate. When the rotating ring (8) rotates, the extrusion part (10) inside it is also driven to rotate. When the extrusion part (10) rotates, it squeezes the resistance part (14). After being squeezed, the resistance part (14) drives the positioning column (16) to move, so that the positioning column (16) is inserted into the positioning groove inside the positioning ring (9), thereby preventing the connecting pipe (4) and the valve body (1) from being separated during operation. S4: When the connecting pipe (4) needs to be disassembled, the valve stem (18) only needs to be rotated in the opposite direction. At the same time, the ball valve (17) will also rotate to close the valve body (1), so as to prevent the valve body (1) from still working when the connecting pipe (4) is disassembled. When the valve stem (18) rotates in the opposite direction, the circular gear (5) and the gear ring (3) will also rotate in the opposite direction, so that the extrusion part (10) inside the rotating ring (8) will be separated from the contact with the resistance part (14). At this time, the positioning column (16) at the bottom of the extrusion part (10) will be separated from the contact with the positioning hole inside the guide groove (26) under the action of the first spring (15). After that, the connecting pipe (4) can be quickly taken out, avoiding the need for multiple workers to disassemble the connecting pipe (4).

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