Gate valve with buffering function

Abstract

The utility model relates to a gate valve with a buffering function, which comprises a valve body, a buffering pipe, a buffering shaft, a fixing piece, a rotating piece, a resetting piece and a fixing mechanism, the buffering pipe and the valve body are fixed and communicated through the fixing mechanism, the buffering shaft is fixedly arranged in the buffering pipe, the fixing piece is fixedly arranged on the buffering shaft, the rotating piece is rotatably arranged on the buffering shaft, and the resetting piece is arranged on the buffering pipe. The rotating part is provided with a buffering position perpendicular to the medium flowing direction, and the reset part is arranged between the fixed part and the rotating part and resets the rotating part to the buffering position. The utility model provides a gate valve with a buffering function.

Description

Technical Field

[0001] The utility model relates to a gate valve, in particular to a gate valve with a buffering function. Background Art

[0002] A gate valve is a common type of shut-off valve. It is mainly used to open or close the flow of the medium in the pipeline and is not suitable for precise flow regulation. The core component of the gate valve is the gate plate, which is usually arranged perpendicular to the pipeline axis. The lifting of the gate plate is controlled by the up-and-down linear movement of the valve stem. When the gate plate is lifted, the valve is fully opened, and the inner diameter of the pipeline has almost no obstruction, allowing the medium to flow freely. When the gate plate descends and fits tightly with the valve seat, the valve is fully closed, and a good sealing effect is achieved by relying on the contact between metal and metal or other sealing materials to prevent the medium from passing through.

[0003] To ensure the sealing performance of the gate valve, multiple sealing rings are used inside the gate valve. When high-pressure water flows through the gate valve, it is easy to damage the sealing rings, thereby affecting the sealing performance. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a gate valve with a buffering function.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: It includes a valve body, a buffer pipe, a buffer shaft, a fixing member, a rotating member, a reset member and a fixing mechanism. The fixing mechanism fixes and connects the buffer pipe to the valve body. The buffer shaft is fixedly arranged inside the buffer pipe. The fixing member is fixedly arranged on the buffer shaft. The rotating member is rotatably arranged on the buffer shaft. The rotating member has a buffer position perpendicular to the direction of the medium flow. The reset member is arranged between the fixing member and the rotating member and resets the rotating member to the buffer position. The reset member can be a spring.

[0006] By adopting the above technical solutions, before high-pressure water enters the gate valve, the buffer pipe is installed on the valve body through the fixing mechanism. Then, when the high-pressure water enters, it first contacts the rotating member, thereby reducing the water flow velocity. At this time, the rotating member rotates, and the reset member is compressed. When the water no longer flows, the reset member drives the rotating member to rotate back to the initial position to prepare for the next buffering. Through the setting of the rotating member, the impact on the inside of the valve body caused by the sudden increase in water flow at the start is effectively reduced, protecting the sealing rings from being damaged.

[0007] The present utility model is further configured as follows: The fixing mechanism includes a rotating rod and a limiting block. A fixing portion opposite to the buffer pipe is provided on the valve body. A rotating through hole for the rotating rod to pass through is provided on the fixing portion. The limiting block is arranged on the rotating rod and located outside the rotating through hole. The buffer pipe is provided with a locking hole opposite to the rotating through hole. An entering groove for the limiting block to enter is provided in the locking hole. An annular groove perpendicular to the entering groove is also provided in the locking hole and the annular groove extends to communicate with the entering groove. The limiting block enters the annular groove to form the fixation between the valve body and the buffer pipe.

[0008] By adopting the above technical solution, when it is necessary to fix the buffer pipe to the valve body, first insert the rotating rod into the rotating through hole and then into the locking hole. At this time, the limiting block is opposite to the entering groove. As the rotating rod continues to enter, until the limiting block reaches the intersection of the entering groove and the annular groove, and then rotate the rotating rod. At this time, the rotating rod cannot move along the locking hole, achieving the fixation of the buffer pipe to the valve body, and the operation is simple, suitable for temporary installation.

[0009] The present utility model is further configured as follows: The rotating rod includes a rotating portion, a rotating shaft, a moving portion, a locking portion and a linkage spring. The limiting blocks are respectively arranged on the moving portion and the locking portion. The rotating portion is located in the rotating through hole. A linkage cavity is provided in the rotating portion. The rotating shaft has a rotating end located in the linkage cavity. The locking portion is arranged on the other side of the rotating shaft relative to the rotating end. The moving portion is slidably arranged on the rotating shaft. The linkage spring is arranged between the moving portion and the locking portion and drives the moving portion away from the locking portion.

[0010] By adopting the above technical solution, when the limiting block of the locking portion moves to the end of the entering groove, at this time, the limiting block of the locking portion is opposite to the annular groove. As the rotating rod continues to enter, the locking portion does not move, the linkage spring is compressed, the moving portion approaches the locking portion until the limiting block on the moving portion is also opposite to the annular groove, and then rotate the rotating rod, so that the two limiting blocks move synchronously along the annular groove. At this time, the linkage spring drives the moving portion to move away from the locking portion, so that the moving portion abuts against the annular groove to prevent the random rotation of the rotating rod, which is practical and convenient.

[0011] The present utility model is further configured as follows: The rotating end is linked to the linkage cavity to form the linkage between the rotating portion and the rotating shaft.

[0012] The present utility model is further configured as follows: A linkage block is provided on the rotating shaft, and a linkage groove is provided on the moving portion. The linkage block and the linkage groove form the synchronous rotation of the rotating shaft and the moving portion.

[0013] The present utility model is further configured as follows: It includes a gate plate, a valve seat and a valve stem. A flow channel is provided in the valve body. The valve stem drives the gate plate to move in a direction perpendicular to the flow channel and cooperate with the valve seat to cut off the flow channel. Description of the Drawings

[0014] Figure 1 This is a schematic structural diagram of the whole utility model;

[0015] Figure 2 For the utility model Figure 1 A partial enlarged view of A in it;

[0016] Figure 3 For the utility model Figure 1 A partial enlarged view of B in it;

[0017] Figure 4 This is a schematic structural diagram of the rotating rod of the utility model;

[0018] Figure 5 This is a schematic diagram of the utility model regarding the inlet groove and the annular groove.

[0019] In the figure: 1. Valve body; 11. Fixed part; 12. Rotating through hole; 2. Buffer tube; 21. Locking hole; 22. Inlet groove; 23. Annular groove; 3. Buffer shaft; 4. Fixing piece; 5. Rotating piece; 6. Reset piece; 7. Fixing mechanism; 71. Rotating rod; 72. Limiting block; 73. Rotating part; 74. Rotating shaft; 75. Moving part; 751. Linkage groove; 752. Linkage block; 76. Locking part; 77. Linkage spring; 78. Linkage cavity; 79. Rotating end; 8. Gate plate; 81. Valve seat; 82. Valve rod; 9. Flow channel. Specific embodiments

[0020] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] Such as Figures 1-5As shown in the figure, the utility model discloses a gate valve with a buffering function, which includes a valve body 1, a buffer pipe 2, a buffer shaft 3, a fixing part 4, a rotating part 5, a reset part 6 and a fixing mechanism 7. The fixing mechanism 7 fixes and connects the buffer pipe 2 with the valve body 1. The buffer shaft 3 is fixedly arranged in the buffer pipe 2. The fixing part 4 is fixedly arranged on the buffer shaft 3. The rotating part 5 is rotatably arranged on the buffer shaft 3. The rotating part 5 has a buffer position perpendicular to the direction of the medium flow. The reset part 6 is arranged between the fixing part 4 and the rotating part 5 and resets the rotating part 5 to the buffer position. The reset part 6 can be a spring. When high-pressure water flow enters the gate valve, the buffer pipe 2 is installed on the valve body 1 through the fixing mechanism 7. Then, when the high-pressure water flow enters, it first contacts the rotating part 5, thereby reducing the water flow velocity. At this time, the rotating part 5 rotates, and the reset part 6 is compressed. When the water flow no longer passes, the reset part 6 drives the rotating part 5 to rotate back to the initial position to prepare for the next buffering. Through the setting of the rotating part 5, the impact on the inside of the valve body 1 caused by the sudden increase in water flow at the start is effectively reduced, and the sealing ring is protected from damage.

[0023] The fixing mechanism 7 includes a rotating rod 71 and a limiting block 72. A fixing part 11 opposite to the buffer pipe 2 is arranged on the valve body 1. A rotating through hole 12 for the rotating rod 71 to pass through is arranged on the fixing part 11. The limiting block 72 is arranged on the rotating rod 71 and is located outside the rotating through hole 12. A locking hole 21 opposite to the rotating through hole 12 is arranged on the buffer pipe 2. An entering groove 22 for the limiting block 72 to enter is arranged in the locking hole 21. An annular groove 23 perpendicular to the entering groove 22 is also arranged in the locking hole 21 and the annular groove 23 extends to communicate with the entering groove 22. The limiting block 72 enters the annular groove 23 to form the fixation of the valve body 1 and the buffer pipe 2. When it is necessary to fix the buffer pipe 2 and the valve body 1, the rotating rod 71 is first inserted into the rotating through hole 12 and then enters the locking hole 21. At this time, the limiting block 72 is opposite to the entering groove 22. As the rotating rod 71 continues to enter, until the limiting block 72 reaches the intersection of the entering groove 22 and the annular groove 23, and then the rotating rod 71 is rotated. At this time, the rotating rod 71 cannot move along the locking hole 21, achieving the fixation of the buffer pipe 2 and the valve body 1, and the operation is simple, which is suitable for temporary installation.

[0024] The rotating rod 71 includes a rotating part 73, a rotating shaft 74, a moving part 75, a locking part 76 and a linkage spring 77. The limiting blocks 72 are respectively arranged on the moving part 75 and the locking part 76. The rotating part 73 is located in the rotating through hole 12. A linkage cavity 78 is arranged in the rotating part 73. The rotating shaft 74 has a rotating end 79 located in the communication cavity. The locking part 76 is arranged on the other side of the rotating shaft 74 relative to the rotating end 79. The moving part 75 is slidably arranged on the rotating shaft 74. The linkage spring 77 is arranged between the moving part 75 and the locking part 76 and drives the moving part 75 away from the locking part 76. When the limiting block 72 of the locking part 76 moves to the end of the entry groove 22, at this time, the limiting block 72 of the locking part 76 is opposite to the annular groove 23. As the rotating rod 71 continues to enter, the locking part 76 does not move, the linkage spring 77 is compressed, and the moving part 75 approaches the locking part 76 until the limiting block 72 on the moving part 75 is also opposite to the annular groove 23. Then, the rotating rod 71 is rotated so that the two limiting blocks 72 move synchronously along the annular groove 23. At this time, the linkage spring 77 drives the moving part 75 to move in the direction away from the locking part 76, so that the moving part 75 abuts against the annular groove 23, preventing the random rotation of the rotating rod 71.

[0025] The rotating end 79 is linked to the linkage cavity 78 and constitutes the linkage between the rotating part 73 and the rotating shaft 74. A linkage block 752 is arranged on the rotating shaft 74, and a linkage groove 751 is arranged on the moving part 75. The linkage block 752 and the linkage groove 751 constitute the synchronous rotation of the rotating shaft 74 and the moving part 75. It includes a gate plate 8, a valve seat 81 and a valve stem 82. A flow channel 9 is arranged in the valve body 1. The valve stem 82 drives the gate plate 8 to move in a direction perpendicular to the flow channel 9 and forms a cut-off of the flow channel 9 with the valve seat 81.

[0026] Working principle: When high-pressure water flow enters before the gate valve, the rotating rod 71 is first inserted into the rotating through hole 12 and then into the locking hole 21. At this time, the limiting block 72 is opposite to the entry groove 22. As the rotating rod 71 continues to enter, when the limiting block 72 of the locking part 76 moves to the end of the entry groove 22, at this time, the limiting block 72 of the locking part 76 is opposite to the annular groove 23. As the rotating rod 71 continues to enter, the locking part 76 does not move, the linkage spring 77 is compressed, and the moving part 75 approaches the locking part 76 until the limiting block 72 on the moving part 75 is also opposite to the annular groove 23. Then, the rotating rod 71 is rotated so that the two limiting blocks 72 move synchronously along the annular groove 23. At this time, the linkage spring 77 drives the moving part 75 to move in the direction away from the locking part 76, so that the moving part 75 abuts against the annular groove 23, preventing the random rotation of the rotating rod 71, achieving the fixation of the buffer pipe 2 and the valve body 1. Then, when the high-pressure water flow enters, it first contacts the rotating part 5, thereby reducing the water flow velocity. At this time, the rotating part 5 rotates, and the reset part 6 is compressed. When the water flow no longer flows, the reset part 6 drives the rotating part 5 to rotate back to the initial position.

[0027] This specific embodiment is only an interpretation of the present utility model and not a limitation thereof. Those skilled in the art can make modifications to this embodiment without creative contributions according to their needs after reading this specification, but as long as it is within the scope of the claims of the present utility model, it is protected by the patent law.

Claims

1. A gate valve with a buffering function, comprising a valve body (1), characterized in that: It includes a buffer tube (2), a buffer shaft (3), a fixing member (4), a rotating member (5), a reset member (6) and a fixing mechanism (7). The fixing mechanism (7) fixes and connects the buffer tube (2) to the valve body (1). The buffer shaft (3) is fixedly arranged inside the buffer tube (2). The fixing member (4) is fixedly arranged on the buffer shaft (3). The rotating member (5) is rotatably arranged on the buffer shaft (3). The rotating member (5) has a buffer position perpendicular to the direction of the medium flow. The reset member (6) is arranged between the fixing member (4) and the rotating member (5) and resets the rotating member (5) to the buffer position.

2. The gate valve with a buffering function according to claim 1, wherein: The fixing mechanism (7) includes a rotating rod (71) and a limiting block (72). A fixing portion (11) opposite to the buffer tube (2) is arranged on the valve body (1). A rotating through hole (12) for the rotating rod (71) to pass through is arranged on the fixing portion (11). The limiting block (72) is arranged on the rotating rod (71) and is located outside the rotating through hole (12). The buffer tube (2) is provided with a locking hole (21) opposite to the rotating through hole (12). An entering groove (22) for the limiting block (72) to enter is arranged in the locking hole (21). An annular groove (23) perpendicular to the entering groove (22) is also arranged in the locking hole (21) and the annular groove (23) extends to communicate with the entering groove (22). The limiting block (72) enters the annular groove (23) to form the fixation between the valve body (1) and the buffer tube (2).

3. A gate valve with a buffering function according to claim 2, characterized in that: The rotating rod (71) includes a rotating portion (73), a rotating shaft (74), a moving portion (75), a locking portion (76) and a linkage spring (77). The limiting blocks (72) are respectively arranged on the moving portion (75) and the locking portion (76). The rotating portion (73) is located inside the rotating through hole (12). A linkage cavity (78) is arranged inside the rotating portion (73). The rotating shaft (74) has a rotating end (79) located inside the linkage cavity. The locking portion (76) is arranged on the other side of the rotating shaft (74) relative to the rotating end (79). The moving portion (75) is slidably arranged on the rotating shaft (74). The linkage spring (77) is arranged between the moving portion (75) and the locking portion (76) and drives the moving portion (75) away from the locking portion (76).

4. A gate valve with a buffering function according to claim 3, characterized in that: The rotating end (79) is linked to the linkage cavity (78) to form the linkage between the rotating portion (73) and the rotating shaft (74).

5. The gate valve with a buffering function according to claim 3, characterized in that: A linkage block (752) is arranged on the rotating shaft (74). A linkage groove (751) is arranged on the moving portion (75). The linkage block (752) and the linkage groove (751) form the synchronous rotation between the rotating shaft (74) and the moving portion (75).

6. A gate valve with a buffering function according to claim 1, characterized in that: It includes a gate plate (8), a valve seat (81) and a valve stem (82). A flow channel (9) is arranged inside the valve body (1). The valve stem (82) drives the gate plate (8) to move in a direction perpendicular to the flow channel (9) and forms the truncation of the flow channel (9) with the valve seat (81).

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