Pressing device for sealing groove of all-welded ball valve seat

Abstract

The utility model provides a pressing device for a sealing groove of a valve seat of an all-welded ball valve, which relates to the technical field of valves and comprises a fixed shell, butt joint shells are fixed at two ends of the fixed shell, a sealing gasket is fixed inside each butt joint shell, a rotating wheel is arranged on the upper portion of the fixed shell, and a pressing plate is arranged on the rotating wheel. A water passing pipe for dredging the interior of the valve is arranged in the fixing shell, two moving grooves are formed in the top face of the fixing shell, and a rotating mechanism for driving the water passing pipe to rotate is arranged outside the fixing shell. According to the pressing device for the all-welded ball valve seat sealing groove, a rotating wheel is rotated through external force, a connecting sleeve is driven to rotate through cooperation among the rotating wheel, a transmission plate, a supporting shaft and a transmission wheel, and a fixing frame is driven to move through cooperation among the connecting sleeve, a rotating rod, a transmission sleeve, a connecting rod, a push rod and a connecting block; the fixing frame drives the sealing ring to slide in the sealing shell, and the sealing ring makes contact with the sealing gasket to seal the space in the valve.

Description

Technical Field

[0001] The utility model relates to a fully welded ball valve, in particular to a pressing device for a sealing groove of a valve seat of a fully welded ball valve, belonging to the technical field of valves. Background Art

[0002] The fully welded ball valve is a new type of valve that has been widely used in recent years. The ball valve can achieve a closed operation by simply rotating 90°. It is mainly used to cut off or connect the medium in the pipeline, and can also be used for fluid regulation and control. It has reliable sealing, simple structure, easy maintenance, and is not easily eroded. The ball valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline, and is widely used in various industries.

[0003] A ball valve seat sealing structure disclosed in the Chinese patent application publication CN218377786U uses a vulcanization method to make the vulcanized special-shaped sealing ring fit tightly with the special-shaped sealing groove of the valve seat and not easy to run out in the special-shaped sealing groove of the valve seat. The special-shaped sealing groove of the valve seat is narrow on the outside and wide on the inside, and grooves are provided on the upper and lower sides to accommodate the upper and lower protrusions of the vulcanized special-shaped sealing ring, which can further effectively prevent the dislocation of the vulcanized special-shaped sealing ring.

[0004] Although the above scheme can make the vulcanized special-shaped sealing ring fit tightly with the special-shaped sealing groove of the valve seat, the valve seat sealing structure in the above patent is not convenient for adjusting the distance between the ball valve and the sealing groove when in use. After the ball valve rotates for a long time and rubs against the sealing ring, it is easy to cause the sealing ring to wear, affecting the sealing effect of the ball valve. For this reason, we provide a pressing device for the sealing groove of a fully welded ball valve seat to solve the above problems. Utility Model Content

[0005] The utility model provides a pressing device for a fully welded ball valve seat sealing groove, so as to solve the problem that the valve seat sealing structure in the prior art is inconvenient to adjust the distance between the ball valve and the sealing groove when in use.

[0006] The utility model is implemented through the following technical scheme: a pressing device for a sealing groove of a fully welded ball valve seat, comprising a fixed shell, both ends of the fixed shell are fixed with docking shells, a sealing gasket is fixed inside each of the docking shells, a rotating wheel is arranged on the upper part of the fixed shell, a water pipe for dredging the inside of the valve is arranged inside the fixed shell, two movable grooves are provided on the top surface of the fixed shell, and a rotating mechanism for driving the water pipe to rotate is arranged outside the fixed shell.

[0007] Specifically, the rotating mechanism includes a transmission plate slidably connected to the inside of the rotating wheel, and two transmission rods are slidably sleeved inside the transmission plate. The bottom ends of the two transmission rods respectively pass through two movable grooves and are fixed on the top surface of the water pipe.

[0008] Specifically, the rotating mechanism further includes a limiting frame fixed to the upper and lower ends of the rotating wheel and a support shaft fixed to the bottom surface of the transmission plate. A transmission wheel is fixed to the bottom end of the support shaft, and a transmission groove is formed inside the transmission wheel.

[0009] Two symmetrical sealing shells are arranged on the outer surface of the water pipe. A sealing ring is slidably connected inside each sealing shell, and a transmission mechanism for driving the two sealing rings to move is arranged outside the water pipe.

[0010] Specifically, the transmission mechanism includes a rotating rod rotatably sleeved inside the fixed shell. The top end of the rotating rod penetrates through the transmission groove inside the transmission wheel and is fixedly sleeved with a connecting sleeve, and the bottom end of the rotating rod penetrates through the top end of the fixed shell and is fixedly sleeved with a transmission sleeve.

[0011] Specifically, the transmission mechanism further includes two connecting rods fixed to the outer side of the transmission sleeve. One end of each connecting rod away from the transmission sleeve is rotatably connected to a push rod, one end of each push rod away from the connecting rod is rotatably connected to a connecting block, a fixing frame is fixed to one side surface of each connecting block, and one side surfaces of the two fixing frames are respectively fixed inside the two sealing rings.

[0012] Specifically, the transmission mechanism further includes two sliding grooves respectively formed on the top surfaces of the two sealing shells. A limiting shaft is fixed inside each sliding groove, and the top ends of the two fixing frames are respectively slidably sleeved around the limiting shaft.

[0013] The utility model provides a pressing device for the sealing groove of a fully welded ball valve seat, and the beneficial effects thereof are as follows:

[0014] 1. For the pressing device for the sealing groove of the fully welded ball valve seat, by rotating the rotating wheel by an external force, the connecting sleeve is driven to rotate through the cooperation among the rotating wheel, the transmission plate, the support shaft and the transmission wheel. The fixing frame is driven to move through the cooperation among the connecting sleeve, the rotating rod, the transmission sleeve, the connecting rod, the push rod and the connecting block. The sealing ring is driven to slide inside the sealing shell through the fixing frame, and the space inside the valve is sealed by the contact between the sealing ring and the sealing gasket.

[0015] 2. For the pressing device for the sealing groove of the fully welded ball valve seat, by rotating the rotating wheel by an external force, the water pipe is driven to horizontally rotate inside the fixed shell through the cooperation between the rotating wheel and the transmission rod. When the rotating wheel is rotated by °, the sealing shell and the docking shell are in the same horizontal position. Then, by lifting the rotating wheel upward by an external force, the transmission plate is driven to move upward through the cooperation between the rotating wheel and the limiting frame. The transmission wheel is driven to move upward through the cooperation between the transmission plate and the support shaft, so that the transmission groove inside the transmission wheel is sleeved on the outer side surface of the connecting sleeve for the next transmission operation. Description of the Drawings

[0016] Figure 1This is the overall three-dimensional structure diagram of the utility model;

[0017] Figure 2 This is the three-dimensional structure sectional view inside the fixed shell of the utility model;

[0018] Figure 3 This is the three-dimensional structure diagram of the rotating mechanism of the utility model;

[0019] Figure 4 This is the three-dimensional structure diagram of the transmission mechanism of the utility model.

[0020] Explanation of reference numerals in the drawings

[0021] 1. Fixed shell; 2. Docking shell; 3. Water pipe; 4. Sealing shell; 5. Runner;

[0022] 6. Rotating mechanism; 61. Transmission plate; 62. Transmission rod; 63. Limiting frame; 64. Support shaft; 65. Transmission wheel;

[0023] 7. Transmission mechanism; 71. Rotating rod; 72. Connecting sleeve; 73. Transmission sleeve; 74. Connecting rod; 75. Push rod; 76. Connecting block; 77. Fixed frame; 78. Limiting shaft; 79. Chute;

[0024] 8. Moving groove; 9. Sealing ring; 10. Sealing gasket. Detailed implementation manners

[0025] Please refer with emphasis to Figure 1 and Figure 2 , the embodiment of the utility model provides a pressing device for the sealing groove of a fully welded ball valve seat, including a fixed shell 1, docking shells 2 are fixed at both ends of the fixed shell 1, a sealing gasket 10 is fixed inside each docking shell 2, a runner 5 is arranged on the upper part of the fixed shell 1, a water pipe 3 for dredging the inside of the valve is arranged inside the fixed shell 1, two moving grooves 8 are opened on the top surface of the fixed shell 1, and a rotating mechanism 6 for driving the water pipe 3 to rotate is arranged outside the fixed shell 1.

[0026] Please refer with emphasis to Figure 3 , the rotating mechanism 6 includes a transmission plate 61 slidably connected inside the runner 5, two transmission rods 62 are slidably sleeved inside the transmission plate 61, the cooperation between the runner 5 and the transmission rods 62 drives the water pipe 3 to horizontally rotate inside the fixed shell 1, rotate the runner 5 by 90° so that the sealing shell 4 and the docking shell 2 are in the same horizontal position, and the bottom ends of the two transmission rods 62 respectively penetrate through the two moving grooves 8 and are fixed on the top surface of the water pipe 3.

[0027] The rotating mechanism 6 further includes a limiting frame 63 fixed to the upper and lower ends of the rotating wheel 5 and a support shaft 64 fixed to the bottom surface of the transmission plate 61. A transmission wheel 65 is fixed to the bottom end of the support shaft 64, and a transmission groove is formed inside the transmission wheel 65.

[0028] In the above solution, by externally rotating the rotating wheel 5, the water passing pipe 3 is driven to horizontally rotate inside the fixed shell 1 through the cooperation between the rotating wheel 5 and the transmission rod 62. The rotating wheel 5 is rotated 90°, so that the sealing shell 4 and the docking shell 2 are in the same horizontal position. Then, the rotating wheel 5 is lifted upward by an external force. The transmission plate 61 is driven to move upward through the cooperation between the rotating wheel 5 and the limiting frame 63. The transmission wheel 65 is driven to move upward through the cooperation between the transmission plate 61 and the support shaft 64, so that the transmission groove inside the transmission wheel 65 is sleeved on the outer side surface of the connecting sleeve 72 for the next transmission operation.

[0029] Please refer specifically to Figure 1 and Figure 2 , two symmetric sealing shells 4 are arranged on the outer surface of the water passing pipe 3. A sealing ring 9 is slidably connected inside each sealing shell 4, and a transmission mechanism 7 for driving the two sealing rings 9 to move is arranged outside the water passing pipe 3.

[0030] Please refer specifically to Figure 4 , the transmission mechanism 7 includes a rotating rod 71 rotatably sleeved inside the fixed shell 1. The top end of the rotating rod 71 penetrates through the transmission groove inside the transmission wheel 65 and is fixedly sleeved with a connecting sleeve 72. The transmission wheel 65 is driven to move upward through the cooperation between the transmission plate 61 and the support shaft 64, so that the transmission groove inside the transmission wheel 65 is sleeved on the outer side of the connecting sleeve 72. The connecting sleeve 72 is driven to rotate through the cooperation between the rotating wheel 5, the transmission plate 61, the support shaft 64 and the transmission wheel 65. The bottom end of the rotating rod 71 penetrates through the top end of the fixed shell 1 and is fixedly sleeved with a transmission sleeve 73. The transmission sleeve 73 is driven to rotate through the connecting sleeve 72 and the rotating rod 71.

[0031] The transmission mechanism 7 further includes two connecting rods 74 fixed to the outer side of the transmission sleeve 73. One end of each connecting rod 74 away from the transmission sleeve 73 is rotatably connected with a push rod 75. One end of each push rod 75 away from the connecting rod 74 is rotatably connected with a connecting block 76. A fixing frame 77 is fixed to one side surface of each connecting block 76. One side surfaces of the two fixing frames 77 are respectively fixed inside the two sealing rings 9. The fixing frames 77 are driven to horizontally slide through the cooperation between the transmission sleeve 73, the connecting rods 74, the push rods 75 and the connecting blocks 76, and the sealing rings 9 are driven to slide inside the sealing shells 4 through the fixing frames 77.

[0032] The transmission mechanism 7 further includes two sliding grooves 79 respectively formed on the top surfaces of the two sealing shells 4. A limiting shaft 78 is fixed inside each sliding groove 79. The top ends of the two fixing frames 77 are respectively slidably sleeved on the periphery of the limiting shaft 78.

[0033] In the above solution, by rotating the runner 5 with an external force, the cooperation between the runner 5, the transmission plate 61, the support shaft 64 and the transmission wheel 65 drives the connecting sleeve 72 to rotate. The cooperation between the connecting sleeve 72 and the rotating rod 71, the transmission sleeve 73, the connecting rod 74, the push rod 75 and the connecting block 76 drives the fixed frame 77 to move. The fixed frame 77 drives the sealing ring 9 to slide inside the sealing housing 4. The sealing ring 9 contacts the sealing gasket 10 to seal the space inside the valve.

[0034] Working principle: When the ball valve is in use, by rotating the runner 5 with an external force, the cooperation between the runner 5 and the transmission rod 62 drives the water pipe 3 to rotate horizontally inside the fixed housing 1. Rotate the runner 5 by 90° so that the sealing housing 4 and the docking housing 2 are in the same horizontal position. Then, by lifting the runner 5 upward with an external force, the cooperation between the runner 5 and the limit frame 63 drives the transmission plate 61 to move upward, lifting the transmission plate 61 above the transmission rod 62. At the same time, the cooperation between the transmission plate 61 and the support shaft 64 drives the transmission wheel 65 to move upward, so that the transmission groove inside the transmission wheel 65 is sleeved outside the connecting sleeve 72. Then, by rotating the runner 5 with an external force, the cooperation between the runner 5, the transmission plate 61, the support shaft 64 and the transmission wheel 65 drives the connecting sleeve 72 to rotate. The connecting sleeve 72 and the rotating rod 71 drive the transmission sleeve 73 to rotate. The cooperation between the transmission sleeve 73, the connecting rod 74, the push rod 75 and the connecting block 76 drives the fixed frame 77 to slide horizontally inside the sliding groove 79. The fixed frame 77 drives the sealing ring 9 to slide inside the sealing housing 4. The sealing ring 9 contacts the sealing gasket 10 to seal the space inside the valve, improving the sealing of the sealing groove inside the valve. Similarly, when the water pipe 3 rotates, the sealing ring 9 is received inside the sealing housing 4 to avoid the sealing ring 9 scraping the sealing gasket 10, improving the safety of valve use.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressing device for the sealing groove of the seat of a fully welded ball valve, comprising a fixed shell (1), characterized in that: Both ends of the fixed shell (1) are fixedly provided with docking shells (2). A sealing gasket (10) is fixedly arranged inside each docking shell (2). A rotating wheel (5) is arranged on the upper part of the fixed shell (1). A water passing pipe (3) for dredging the inside of the valve is arranged inside the fixed shell (1). Two moving grooves (8) are formed in the top surface of the fixed shell (1). A rotating mechanism (6) for driving the water passing pipe (3) to rotate is arranged outside the fixed shell (1). Two symmetrical sealing shells (4) are arranged on the outer surface of the water passing pipe (3). A sealing ring (9) is slidably connected inside each sealing shell (4). A transmission mechanism (7) for driving the two sealing rings (9) to move is arranged outside the water passing pipe (3).

2. The pressing device for the seat sealing groove of a fully welded ball valve according to claim 1, characterized in that: The rotating mechanism (6) includes a transmission plate (61) slidably connected inside the rotating wheel (5). Two transmission rods (62) are slidably sleeved inside the transmission plate (61). The bottom ends of the two transmission rods (62) respectively penetrate through the two moving grooves (8) and are fixed on the top surface of the water passing pipe (3).

3. The pressing device for the seat sealing groove of a fully welded ball valve according to claim 2, characterized in that: The rotating mechanism (6) further includes a limiting frame (63) fixed at the upper and lower ends of the rotating wheel (5) and a support shaft (64) fixed at the bottom surface of the transmission plate (61). A transmission wheel (65) is fixed at the bottom end of the support shaft (64). A transmission groove is formed inside the transmission wheel (65).

4. The pressing device for the seat sealing groove of a fully welded ball valve according to claim 1, characterized in that: The transmission mechanism (7) includes a rotating rod (71) rotatably sleeved inside the fixed shell (1). The top end of the rotating rod (71) penetrates through the transmission groove inside the transmission wheel (65) and is fixedly sleeved with a connecting sleeve (72). The bottom end of the rotating rod (71) penetrates through the top end of the fixed shell (1) and is fixedly sleeved with a transmission sleeve (73).

5. The pressing device for the seat sealing groove of a fully welded ball valve according to claim 4, characterized in that: The transmission mechanism (7) further includes two connecting rods (74) fixed on the outer side of the transmission sleeve (73). One end of each connecting rod (74) away from the transmission sleeve (73) is rotatably connected with a push rod (75). One end of each push rod (75) away from the connecting rod (74) is rotatably connected with a connecting block (76). A fixing frame (77) is fixed on one side surface of each connecting block (76). One side surfaces of the two fixing frames (77) are respectively fixed inside the two sealing rings (9).

6. The pressing device for the seat sealing groove of a fully welded ball valve according to claim 5, characterized in that: The transmission mechanism (7) further includes two sliding grooves (79) respectively formed in the top surfaces of the two sealing shells (4). A limiting shaft (78) is fixed inside each sliding groove (79). The top ends of the two fixing frames (77) are respectively slidably sleeved on the periphery of the limiting shaft (78).

Images