A high sealing flap valve

Abstract

A kind of high sealing gate, including gate body, the gate body is covered with a sealing cover;The outer wall of the left and right sides of the sealing cover is equipped with the opening and closing hole being penetrated with its internal space;The left and right sides of the gate body are equipped with mutually symmetrical sealing plane, sealing plane is attached with sealing cover inner wall;The outer wall of the gate body covers the inner end orifice of opening and closing hole and seals;The inner wall of the sealing cover is equipped with the sealing groove being located in the upper and lower sides of the inner end orifice of opening and closing hole, and sealing groove is in the shape of mouth character;The sealing groove is equipped with the sealing ring being matched with it, and sealing ring is of silica gel material;The sealing cover is equipped with the limiting structure being matched with sealing ring;The outer wall of the upper end of the sealing cover is equipped with a clamping portion;The outer edge of the clamping portion is equipped with several evenly distributed fixing holes.The high sealing gate of the utility model not only can realize high sealing property, and is convenient for processing and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, and in particular to a high-sealing gate. Background Technology

[0002] Gate valves are a common type of fluid control valve. They control the flow path by raising and lowering a gate. Traditional gate valves typically consist of a valve body with an opening and closing chamber inside. The gate is directly installed within the opening and closing chamber. Inlet and outlet connectors are located on the left and right sides of the valve body, and these connectors are connected through the opening and closing chamber. When the gate valve is closed, the gate moves down to cover its internal flow path. Sealing is achieved by the tight fit between the outer wall of the gate and the inner wall of the opening and closing chamber. However, the valve body is usually a casting, and the machining precision and smoothness of the inner wall of the opening and closing chamber are limited, making it difficult to ensure a complete and uniform fit with the gate, which can easily lead to leakage. At the same time, the opening and closing chamber is located deep inside the valve body. If a groove for installing a seal is to be machined on the inner wall of the opening and closing chamber, the entire machining process is extremely complex, costly, and inconvenient for later maintenance and replacement. Utility Model Content

[0003] The present invention aims to solve the existing technical problem by providing a high-sealing gate that not only achieves high sealing performance but is also easy to process and maintain.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model discloses a high-sealing gate, including a gate body covered by a sealing cover; the sealing cover has opening and closing holes communicating with its internal space on both the left and right outer walls; the gate body has symmetrical sealing planes on both the left and right sides, which fit against the inner wall of the sealing cover; the outer wall of the gate body covers and seals the inner end opening of the opening and closing hole; the inner wall of the sealing cover has sealing grooves located on the upper and lower sides of the inner end opening of the opening and closing hole, and the sealing grooves are U-shaped; a matching sealing ring is provided in the sealing groove, and the sealing ring is made of silicone; the sealing cover has a limiting structure matching the sealing ring; the upper outer wall of the sealing cover has a locking part; the outer edge of the locking part has several evenly distributed fixing holes.

[0006] The limiting structure includes several limiting holes evenly arranged in a circle on the inner wall of the sealing ring; the outer wall of the sealing cover is provided with several hidden grooves coaxial with the limiting holes; a first connecting hole is provided at the center of the bottom of the hidden groove; a second connecting hole is provided at the bottom of the limiting hole and communicates with the first connecting hole; a limiting screw passes through the second connecting hole and the first connecting hole in sequence and is screwed with a limiting nut that fits against the bottom of the hidden groove.

[0007] The limiting hole is equipped with a matching sealing block, which is made of silicone. The inner end face of the sealing block is coplanar with the inner wall of the sealing ring. The sealing block has a conical cavity inside, and the diameter of the conical cavity decreases in the direction away from the main body of the gate. The center of the outer end face of the sealing block has a through hole that communicates with the conical cavity. The screw body of the limiting screw passes through the through hole, and the limiting screw has a conical head that matches the conical cavity. There is a compression gap between the conical head and the through hole.

[0008] The lower surface of the locking part is provided with an auxiliary groove in the shape of a "U"; the upper surface of the locking part is provided with several positioning screw holes that are connected to the center of the bottom of the auxiliary groove; a matching positioning screw is screwed into the positioning screw hole, and the lower end of the positioning screw goes downward into the auxiliary groove; an auxiliary sealing ring made of silicone is provided at the lower opening of the auxiliary groove; a pressure plate that fits against the upper surface of the auxiliary sealing ring is provided in the auxiliary groove; a pressure spring outside the positioning screw is provided between the upper surface of the pressure plate and the bottom of the auxiliary groove.

[0009] The positioning screw has a sealing head at its upper end, located above the locking part; the positioning screw is fitted with an O-ring located on the lower surface of the sealing head and the upper surface of the locking part.

[0010] A lifting screw hole is provided at the center of the upper end face of the gate body.

[0011] This utility model has the following beneficial effects:

[0012] Compared with the prior art, the high-sealing gate with the structure of this utility model can not only effectively achieve the high sealing performance of the gate by using the sealing ring and auxiliary sealing ring, but also integrate the entire complex sealing system into an independent sealing cover module. When the sealing element needs to be replaced, there is no need to disassemble the entire valve or simply open the guide seat from the top of the valve body, unscrew the fastening screws, and the entire sealing cover module together with the gate can be taken out from the lifting hole for convenient replacement or maintenance, which greatly reduces downtime and maintenance costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the high-sealing gate of this utility model;

[0014] Figure 2 yes Figure 1 An enlarged view of part A;

[0015] Figure 3 This is a schematic diagram of the structure of the high-sealing gate plate of this utility model when it is assembled onto the gate valve. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0017] Please see Figures 1 to 3 This utility model provides a high-sealing gate, including a gate body 1, which is covered by a sealing cover 2; the sealing cover 2 has opening and closing holes 3 on both the left and right outer walls that communicate with its internal space; the gate body 1 has symmetrical sealing planes 4 on both the left and right sides, which fit against the inner wall of the sealing cover 2; the outer wall of the gate body 1 covers and seals the inner end opening of the opening and closing hole 3; the inner wall of the sealing cover 2 has sealing grooves 5 located on the upper and lower sides of the inner end opening of the opening and closing hole 3, which are U-shaped; the sealing grooves 5 have matching sealing rings 6 made of silicone; the sealing cover 2 has a limiting structure matching the sealing rings 6; the upper outer wall of the sealing cover 2 has a locking part 7; the outer edge of the locking part 7 has several evenly distributed fixing holes 8.

[0018] The limiting structure includes several limiting holes 9 evenly arranged in a circle on the inner wall of the sealing ring 6; the outer wall of the sealing cover 2 is provided with several hidden grooves 10 coaxial with the limiting holes 9; the center of the bottom of the hidden groove 10 is provided with a first connecting hole 11; the bottom of the limiting hole 9 is provided with a second connecting hole 12 that communicates with the first connecting hole 11; a limiting screw 13 passes through the second connecting hole 12 and the first connecting hole 11 in sequence and is screwed with a limiting nut 14 that fits against the bottom of the hidden groove 10.

[0019] The limiting hole 9 is provided with a matching sealing block 15, which is made of silicone. The inner end face of the sealing block 15 is coplanar with the inner wall of the sealing ring 6. The sealing block 15 has a conical cavity 16 inside, and the diameter of the conical cavity 16 decreases in the direction away from the gate body 1. The center of the outer end face of the sealing block 15 is provided with a through hole 17 that communicates with the conical cavity 16. The screw body of the limiting screw 13 passes through the through hole 17, and the limiting screw 13 has a conical head 18 that matches the conical cavity 16. There is a compression gap 19 between the conical head 18 and the through hole 17.

[0020] The lower surface of the locking part 7 is provided with an auxiliary groove 20 in the shape of a square; the upper surface of the locking part 7 is provided with a plurality of positioning screw holes 21 that are connected to the center of the bottom of the auxiliary groove 20; a matching positioning screw 21 is screwed into the positioning screw hole 21, and the lower end of the positioning screw 21 is inserted downward into the auxiliary groove 20; an auxiliary sealing ring 22 that is matched to the lower opening of the auxiliary groove 20 is provided, and the auxiliary sealing ring 22 is made of silicone; a pressure plate 23 that fits against the upper surface of the auxiliary sealing ring 22 is provided in the auxiliary groove 20; a pressure spring 24 that is fitted outside the positioning screw 21 is provided between the upper surface of the pressure plate 23 and the bottom of the auxiliary groove 20.

[0021] The positioning screw 21 has a sealing head 25 located above the locking part 7 at its upper end; the positioning screw 21 is fitted with an O-ring 26 located on the lower surface of the sealing head 25 and the upper surface of the locking part 7.

[0022] A lifting screw hole 27 is provided at the center of the upper end face of the gate body 1.

[0023] The method of using this utility model is as follows:

[0024] The valve body 301 of the gate valve is provided with an inlet connector 302 and an outlet connector 303 on the left and right sides respectively. The valve body 301 has an opening and closing chamber 304 inside. The upper surface of the middle part of the valve body 301 has a boss 305. The upper end face of the boss 305 has a lifting hole 306 that communicates with the opening and closing chamber 304. The upper end of the lifting hole 306 is screwed with a guide seat 307. The center of the guide seat 307 has a guide hole 308. The guide hole 308 is provided with a matching valve stem 309. The upper end of the valve stem 309 extends upward to the outside of the guide hole 308 and is provided with a handwheel 310. The lower end of the valve stem 309 is screwed into the lifting screw hole 27.

[0025] The sealing cover 2 can be directly installed into the opening and closing cavity 304 through the lifting hole 306. At this time, the lower surface of the locking part 7 at the upper end of the sealing cover 2 is in contact with the bottom of the lifting hole 306. At the same time, a fastening screw hole 311 corresponding to the position of the fixing hole 8 can be provided at the bottom of the lifting hole 306. By simply passing the fastening screw 312 through the fixing hole 8 and screwing it into the fastening screw hole 311, the stability of the sealing cover 2 when installed in the opening and closing cavity 304 can be guaranteed to the greatest extent.

[0026] The presence of sealing ring 6 can effectively ensure the sealing between the inner wall of sealing ring 6 and the outer wall of gate body 1. The lower surface of auxiliary sealing ring 22 is in close contact with the bottom of lifting hole 306, which can effectively ensure the sealing between the lower surface of locking part 7 and the bottom of lifting hole 306.

[0027] The sealing rings 6 located on the upper and lower sides of the opening and closing hole 3 can form two complete sealing lines around the gate body 1. When the gate body 1 is closed, its smooth sealing surface 4 is tightly fitted with the upper and lower silicone sealing rings 6, forming a double sealing barrier, which greatly eliminates the possibility of medium leakage from both sides of the gate body 1. The sealing reliability is far superior to the traditional gate's single metal surface bonding sealing method.

[0028] The presence of the limiting structure not only serves to fix the sealing ring 6 and prevent it from detaching from the sealing groove 5, but also has a squeezing function. When the limiting screw 13 and the limiting nut 14 are tightened together, the conical head 18 of the limiting screw 13 will move towards the through hole 17. At this time, the conical head 18 squeezes the inner wall of the conical cavity 16 outward, thereby pressing the outer wall of the sealing block 15 tightly against the inner wall of the limiting hole 9, ultimately enhancing the clamping force of the sealing ring 6 on the gate body 1 and the sealing contact pressure.

[0029] The auxiliary sealing ring 22, pressure plate 23, and pressure spring 24 on the locking part 7 form an adaptive top sealing system. When the locking part 7 is fixed to the bottom of the lifting hole 306, the pressure spring 24 continuously applies downward pressure to the pressure plate 23 and the auxiliary sealing ring 22 to ensure that the auxiliary sealing ring 22 can fit tightly against the bottom of the lifting hole 306, automatically compensate for the gap caused by machining errors or wear, and effectively prevent the medium from leaking from the mounting joint surface between the top of the sealing cover 2 and the valve body 301.

[0030] In summary, this invention not only effectively achieves high sealing performance of the gate by utilizing the sealing ring 6 and the auxiliary sealing ring 22, but also integrates the entire complex sealing system onto the independent sealing cover 2 module. When the sealing element needs to be replaced, there is no need to disassemble the entire valve or simply open the guide seat 307 from above the valve body 301 and unscrew the fastening screw 312. The entire sealing cover 2 module, along with the gate, can then be removed from the lifting hole 306 for convenient replacement or maintenance, greatly reducing downtime and maintenance costs.

[0031] The upper end of the positioning screw 21 has a sealing head 25 located above the locking part 7. The positioning screw 21 is fitted with an O-ring 26 located on the lower surface of the sealing head 25 and the upper surface of the locking part. The presence of the O-ring 26 can effectively ensure the sealing of the upper screw hole of the positioning screw hole 21.

[0032] Since the lower end of the valve stem 309 is screwed into the lifting screw hole 27 on the upper end face of the gate body 1, and the sealing planes 4 on the left and right sides of the gate body 1 are in contact with the inner wall of the sealing cover 2, under the restriction of the inner walls on the left and right sides of the sealing cover 2, when the handwheel 310 drives the valve stem 309 to rotate, the gate body 1 can convert the rotational force into its own up-and-down movement force, thereby realizing the opening and closing of the gate valve.

Claims

1. A high-sealing gate, comprising a gate body, characterized in that: The gate body is covered by a sealing cover; the outer walls of the left and right sides of the sealing cover are provided with opening and closing holes that communicate with their internal space; the left and right sides of the gate body are provided with symmetrical sealing planes that fit against the inner wall of the sealing cover; the outer wall of the gate body covers and seals the inner end opening of the opening and closing hole; the inner wall of the sealing cover is provided with sealing grooves located on the upper and lower sides of the inner end opening of the opening and closing hole, and the sealing grooves are U-shaped; a matching sealing ring is provided in the sealing groove, and the sealing ring is made of silicone; the sealing cover is provided with a limiting structure that matches the sealing ring; the upper outer wall of the sealing cover is provided with a locking part; the outer edge of the locking part is provided with several evenly distributed fixing holes.

2. The high-sealing gate according to claim 1, characterized in that: The limiting structure includes several limiting holes evenly arranged in a circle on the inner wall of the sealing ring; the outer wall of the sealing cover is provided with several hidden grooves coaxial with the limiting holes; a first connecting hole is provided at the center of the bottom of the hidden groove; a second connecting hole is provided at the bottom of the limiting hole and communicates with the first connecting hole; a limiting screw passes through the second connecting hole and the first connecting hole in sequence and is screwed with a limiting nut that fits against the bottom of the hidden groove.

3. A high-sealing gate according to claim 2, characterized in that: The limiting hole is equipped with a matching sealing block, which is made of silicone. The inner end face of the sealing block is coplanar with the inner wall of the sealing ring. The sealing block has a conical cavity inside, and the diameter of the conical cavity decreases in the direction away from the main body of the gate. The center of the outer end face of the sealing block has a through hole that communicates with the conical cavity. The screw body of the limiting screw passes through the through hole, and the limiting screw has a conical head that matches the conical cavity. There is a compression gap between the conical head and the through hole.

4. A high-sealing gate according to claim 1, characterized in that: The lower surface of the locking part is provided with an auxiliary groove in the shape of a "U"; the upper surface of the locking part is provided with several positioning screw holes that are connected to the center of the bottom of the auxiliary groove; a matching positioning screw is screwed into the positioning screw hole, and the lower end of the positioning screw goes downward into the auxiliary groove; an auxiliary sealing ring made of silicone is provided at the lower opening of the auxiliary groove; a pressure plate that fits against the upper surface of the auxiliary sealing ring is provided in the auxiliary groove; a pressure spring outside the positioning screw is provided between the upper surface of the pressure plate and the bottom of the auxiliary groove.

5. A high-sealing gate according to claim 4, characterized in that: The positioning screw has a sealing head at its upper end, located above the locking part; the positioning screw is fitted with an O-ring located on the lower surface of the sealing head and the upper surface of the locking part.

6. A high-sealing gate according to claim 1, characterized in that: A lifting screw hole is provided at the center of the upper end face of the gate body.

Images