A quick cut-off valve

Abstract

The utility model belongs to valve technical field, and disclose a kind of quick cut-off valve, including valve body, the inside of valve body is equipped with valve cavity, the inside of valve cavity is installed with valve core, the top of valve body is provided with shaft seal ring, the bottom of shaft seal ring is fixedly connected with positioning ring, the inside of shaft seal ring and positioning ring is movably sleeved with valve stem, the sealed connection between valve stem and shaft seal ring, the upper end of valve stem is connected with runner and fixedly connected with positioning ring and positioning ring;The valve core includes the valve seat assembly of fixed connection in the inside of valve cavity, and the middle part of valve seat assembly is horizontal structure.The utility model because the setting of valve stem, can under the cooperation of shaft seal ring, make valve stem can be relatively slid with valve body, and can make both keep sealed state, and then by directly pushing and pulling valve stem and the runner on its upper end, linkage assembly and valve plate can be realized quick movement, to reach the effect of quick cut-off.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, specifically a quick-shut-off valve. Background Technology

[0002] Among the many types of valves currently available, gate valves and globe valves, which are rotary linear motion valves, can be easily opened or closed manually, thus enjoying a good market share. However, precisely because of their linear rotary motion, the rotation of a complete turn of the thread can only control the movement of the sealing element by one thread pitch, greatly reducing the efficiency of opening and closing. This is extremely inconvenient in situations requiring precise flow control or in emergency situations. Moreover, the valve core of existing valves is still a complete structure, so when the control plate moves back and forth in the valve cavity, the flowing medium will generate significant resistance to the movement of the sealing plate, further reducing the shut-off rate.

[0003] Therefore, it is necessary to develop a fast shut-off valve to address the shortcomings of existing technologies. Utility Model Content

[0004] To address the problems mentioned in the background section, this invention provides a quick-shutdown valve with the advantage of rapid flow control.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a quick-shutdown valve, comprising a valve body, a valve cavity being provided inside the valve body, a valve core being installed inside the valve cavity, a shaft sealing ring being provided at the top of the valve body, a positioning ring being fixedly connected to the bottom of the shaft sealing ring, a valve stem being movably sleeved inside the shaft sealing ring and the positioning ring, the valve stem being sealed to the shaft sealing ring, and a rotating wheel being fixedly connected to the upper end of the valve stem through the shaft sealing ring and the positioning ring; The valve core includes a valve seat assembly fixedly connected inside the valve cavity. The middle part of the valve seat assembly is a horizontal structure, and the two ends of the valve seat assembly are parallel inclined structures. The two ends of the valve seat assembly are respectively connected to the upper and lower sides of the two ends of the valve cavity. The valve body and the valve cavity are separated into two independent spaces by the valve seat assembly. The horizontal structure in the middle of the valve seat assembly has evenly distributed valve plates attached to it. The top of the valve plates is connected to a linkage assembly, which is connected to the bottom of the valve stem. The outer surface of the valve plates is a smooth inclined surface.

[0006] Furthermore, the valve seat assembly includes a valve seat fixedly connected to the inside of the valve cavity. The valve seat has a through hole in the middle horizontal structure. A positioning shaft passes through the middle of the through hole. A plurality of evenly distributed guide vanes are fixedly connected between the through hole and the positioning shaft. The axial length of the valve plate and the guide vanes is greater than the axial length of the middle horizontal structure of the valve seat.

[0007] Furthermore, several guide vanes correspond one-to-one with the linkage components, and the linkage components are sealed between the through hole and the positioning shaft and inside two adjacent guide vanes.

[0008] Furthermore, the projected area of ​​several of the guide vanes when viewed from above is larger than the area of ​​the cavity between the through hole and the positioning shaft, the outer surfaces of the guide vanes and the valve plate are smooth surfaces that are parallel to each other, and the guide vanes and the valve plate are spiral-shaped.

[0009] Furthermore, the linkage component includes a connecting frame fixedly connected to the bottom of the valve stem, and a plurality of evenly distributed connecting rods are fixedly connected to the bottom of the connecting frame. Each of the connecting rods corresponds to a valve plate, and the bottom of the connecting rod is fixedly connected to the top of a corresponding valve plate. A connecting groove is provided inside the connecting frame, and the upper and lower ends of the connecting frame are interconnected through the connecting groove.

[0010] Furthermore, the outer surface of the valve stem is provided with three threads, which move up and down with the valve stem and are connected to the positioning ring. When the lower thread is connected to the positioning ring, the bottom of the valve plate is located above the valve seat assembly; when the middle thread is connected to the positioning ring, the lower end of the outer surface of the valve plate is attached to the space between the through hole and the positioning shaft and the two adjacent guide vanes; when the upper thread is connected to the positioning ring, the upper end of the outer surface of the valve plate is attached to the space between the through hole and the positioning shaft and the two adjacent guide vanes.

[0011] Furthermore, the valve body is connected to an inlet pipe and an outlet pipe at both ends, respectively. The inlet pipe and the outlet pipe are connected to both ends of the valve cavity through the valve body, and the inlet pipe and the outlet pipe are interconnected through the valve seat assembly in the valve cavity.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: Due to the valve stem configuration, this invention allows the valve stem to slide relative to the valve body with the cooperation of the shaft sealing ring, maintaining a sealed state between them. Furthermore, by directly pushing and pulling the valve stem and the upper wheel, the linkage assembly and valve plate can be moved quickly, thereby achieving a rapid cut-off effect.

[0013] The present invention, due to the setting of the guide plate, allows the water flow to be changed, avoiding the situation where the water flow direction is completely opposite to the valve plate movement direction, thereby effectively reducing the resistance of the water flow to the valve plate movement, thus helping to improve the efficiency of valve body cut-off and opening. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the connection structure of the valve core of this utility model; Figure 3This is a disassembly diagram of the valve core and its connection structure of this utility model; Figure 4 This is a schematic diagram of the valve seat assembly of this utility model; Figure 5 This is a schematic diagram of the linkage component of this utility model.

[0015] In the diagram: 1. Valve body; 2. Valve cavity; 3. Valve core; 31. Valve seat assembly; 311. Valve seat; 312. Through hole; 313. Positioning shaft; 314. Guide vane; 32. Valve plate; 33. Linkage assembly; 331. Connecting frame; 332. Connecting rod; 333. Connecting groove; 4. Shaft seal ring; 5. Valve stem; 6. Positioning ring; 7. Rotary wheel; 8. Feed pipe; 9. Discharge pipe; 10. Thread. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figures 1 to 5 As shown, this utility model provides a quick-cut-off valve, including a valve body 1, a valve cavity 2 inside the valve body 1, a valve core 3 installed inside the valve cavity 2, a shaft sealing ring 4 at the top of the valve body 1, a positioning ring 6 fixedly connected to the bottom of the shaft sealing ring 4, a valve stem 5 movably sleeved inside the shaft sealing ring 4 and the positioning ring 6, the valve stem 5 and the shaft sealing ring 4 are sealed together, the upper end of the valve stem 5 passes through the shaft sealing ring 4 and the positioning ring 6 and is fixedly connected to a rotating wheel 7; due to the setting of the valve stem 5, with the cooperation of the shaft sealing ring 4, the valve stem 5 can slide relative to the valve body 1 and can keep the two in a sealed state, and then by directly pushing and pulling the valve stem 5 and the rotating wheel 7 at its upper end, the linkage component 33 and the valve plate 32 can be moved quickly, thereby achieving the effect of quick cut-off; The valve core 3 includes a valve seat assembly 31 fixedly connected inside the valve cavity 2. The middle part of the valve seat assembly 31 is a horizontal structure, and the two ends of the valve seat assembly 31 are parallel inclined structures. The two ends of the valve seat assembly 31 are respectively connected to the upper and lower sides of the inner cavity of the valve cavity 2. The valve body 1 and the valve cavity 2 are separated into two independent spaces by the valve seat assembly 31. The valve plate 32 is uniformly distributed in the middle horizontal structure of the valve seat assembly 31. The top of the valve plate 32 is connected to the linkage assembly 33, which is connected to the bottom of the valve stem 5. The outer surface of the valve plate 32 is a smooth inclined surface. Due to the setting of the linkage assembly 33, the valve plate 32 can be quickly moved up and down with the cooperation of the valve stem 5, thereby helping to improve the opening and closing efficiency of the valve body.

[0018] The valve seat assembly 31 includes a valve seat 311 fixedly connected to the inside of the valve cavity 2. A through hole 312 is opened in the middle of the horizontal structure of the valve seat 311. A positioning shaft 313 passes through the middle of the through hole 312. A plurality of evenly distributed guide vanes 314 are fixedly connected between the through hole 312 and the positioning shaft 313. The axial length of the valve plate 32 and the guide vanes 314 is greater than the axial length of the middle horizontal structure of the valve seat 311. The guide vane 314 allows the water flow to be altered, preventing the water flow direction from being completely opposite to the movement direction of the valve plate 32. This effectively reduces the resistance generated by the water flow on the movement of the valve plate 32, thereby helping to improve the efficiency of valve body shut-off and opening.

[0019] Among them, several guide vanes 314 correspond one-to-one with the linkage component 33, and the linkage component 33 is sealed between the through hole 312 and the positioning shaft 313 and inside two adjacent guide vanes 314.

[0020] Among them, the projected area of ​​several guide vanes 314 when viewed from above is larger than the area of ​​the cavity between the through hole 312 and the positioning shaft 313. The outer surfaces of the guide vanes 314 and the valve plate 32 are smooth surfaces that are parallel to each other, and the guide vanes 314 and the valve plate 32 are spiral.

[0021] The linkage component 33 includes a connecting frame 331 fixedly connected to the bottom of the valve stem 5. Several connecting rods 332 are evenly distributed and fixedly connected to the bottom of the connecting frame 331. Each connecting rod 332 corresponds to a valve plate 32. The bottom of the connecting rod 332 is fixedly connected to the top of a corresponding valve plate 32. A connecting groove 333 is provided inside the connecting frame 331. The upper and lower ends of the connecting frame 331 are interconnected through the connecting groove 333. Due to the linkage component 33, in cooperation with the connecting rod 332, it can pass through the inside of the through hole 312 to the upper and lower ends of the guide plate 314, thereby allowing the valve plate 32 to completely pass through the through hole 312 and extend to the bottom of the guide plate 314. This greatly increases the range of movement of the valve plate 32. Furthermore, under the action of the inclined surface of the outer surface of the valve plate 32, the rapidly reciprocating valve plate 32 can push the water flow at the bottom of the valve cavity 2 to avoid sedimentation, thus ensuring the cleanliness of the valve body.

[0022] The valve stem 5 has three threads 10 on its outer surface. The threads 10 move up and down with the valve stem 5 and are connected to the positioning ring 6. When the lower thread 10 is connected to the positioning ring 6, the bottom of the valve plate 32 is located above the valve seat assembly 31. When the middle thread 10 is connected to the positioning ring 6, the lower end of the outer surface of the valve plate 32 is attached to the space between the through hole 312 and the positioning shaft 313 and the two adjacent guide vanes 314. When the upper thread 10 is connected to the positioning ring 6, the upper end of the outer surface of the valve plate 32 is attached to the space between the through hole 312 and the positioning shaft 313 and the two adjacent guide vanes 314.

[0023] The valve body 1 is connected to a feed pipe 8 and a discharge pipe 9 at its two ends respectively. The feed pipe 8 and the discharge pipe 9 are connected to the two ends of the valve cavity 2 through the valve body 1 respectively. The feed pipe 8 and the discharge pipe 9 are connected to each other through the valve seat assembly 31 in the valve cavity 2.

[0024] Working principle and usage process of this utility model: The feed pipe 8 and discharge pipe 9 are connected to the pipes at both ends by bolts or flanges, and then the valve body is installed in the pipeline. Rotating the rotating wheel 7 separates the lowest thread 10 from the positioning ring 6. Then, the rotating wheel 7 can be moved up and down, which drives the linkage assembly 33 and valve plate 32 through the valve stem 5. This allows the valve plate 32 to be screwed into several guide vanes 314 between the through hole 312 and the positioning shaft 313. When the outer surface of the valve plate 32 is completely in contact with the guide vanes 314 and the surface of the through hole 312, the valve body is ready for use. The valve plate 32 and the linkage assembly 33 rotate simultaneously due to the guiding effect of the guide plate 314. This causes the valve stem 5 to rotate as it moves downward, so that one of the two upper threads 10 is screwed into the positioning ring 6. When the upper thread 10 is screwed into the positioning ring 6, the top of the outer surface of the valve plate 32 is in contact with the inside of the through hole 312. When the middle thread 10 is screwed into the positioning ring 6, the bottom of the outer surface of the valve plate 32 is in contact with the inside of the through hole 312.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-shut-off valve, comprising a valve body (1), characterized in that: The valve body (1) has a valve cavity (2) inside, and a valve core (3) is installed inside the valve cavity (2). A shaft sealing ring (4) is provided on the top of the valve body (1). A positioning ring (6) is fixedly connected to the bottom of the shaft sealing ring (4). A valve stem (5) is movably sleeved inside the shaft sealing ring (4) and the positioning ring (6). The valve stem (5) is sealed to the shaft sealing ring (4). The upper end of the valve stem (5) passes through the shaft sealing ring (4) and the positioning ring (6) and is fixedly connected to a rotating wheel (7). The valve core (3) includes a valve seat assembly (31) fixedly connected inside the valve cavity (2). The middle part of the valve seat assembly (31) is a horizontal structure, and the two ends of the valve seat assembly (31) are parallel inclined structures. The two ends of the valve seat assembly (31) are respectively connected to the upper and lower sides of the inner cavity of the valve cavity (2). The valve body (1) and the valve cavity (2) are separated into two independent spaces by the valve seat assembly (31). The valve plate (32) is uniformly distributed in the middle horizontal structure of the valve seat assembly (31). The top of the valve plate (32) is connected to a linkage assembly (33). The linkage assembly (33) is connected to the bottom of the valve stem (5). The outer surface of the valve plate (32) is a smooth inclined surface.

2. The quick-shut-off valve according to claim 1, characterized in that: The valve seat assembly (31) includes a valve seat (311) fixedly connected to the inside of the valve cavity (2). A through hole (312) is provided in the middle of the horizontal structure of the valve seat (311). A positioning shaft (313) passes through the middle of the through hole (312). A plurality of evenly distributed guide vanes (314) are fixedly connected between the through hole (312) and the positioning shaft (313). The axial length of the valve plate (32) and the guide vanes (314) is greater than the axial length of the middle horizontal structure of the valve seat (311).

3. A quick-shutdown valve according to claim 2, characterized in that: Several guide vanes (314) correspond one-to-one with the linkage component (33), and the linkage component (33) is sealed between the through hole (312) and the positioning shaft (313) and inside two adjacent guide vanes (314).

4. A quick-shutdown valve according to claim 2, characterized in that: The projected area of ​​several of the guide vanes (314) when viewed from above is larger than the area of ​​the cavity between the through hole (312) and the positioning shaft (313). The outer surfaces of the guide vanes (314) and the valve plate (32) are smooth surfaces that are parallel to each other. The guide vanes (314) and the valve plate (32) are spiral.

5. A quick-shutdown valve according to claim 1, characterized in that: The linkage component (33) includes a connecting frame (331) fixedly connected to the bottom of the valve stem (5). The bottom of the connecting frame (331) is fixedly connected to a plurality of evenly distributed connecting rods (332). The plurality of connecting rods (332) correspond one-to-one with the valve plate (32). The bottom of the connecting rod (332) is fixedly connected to the top of the corresponding valve plate (32). A connecting groove (333) is provided inside the connecting frame (331). The upper and lower ends of the connecting frame (331) are interconnected through the connecting groove (333).

6. A quick-shutdown valve according to claim 2, characterized in that: The outer surface of the valve stem (5) is provided with three threads (10). The threads (10) move up and down with the valve stem (5) and are connected to the positioning ring (6). When the lower thread (10) is connected to the positioning ring (6), the bottom of the valve plate (32) is located above the valve seat assembly (31). When the middle thread (10) is connected to the positioning ring (6), the lower end of the outer surface of the valve plate (32) is attached to the through hole (312) and the positioning shaft (313) and the two adjacent guide plates (314). When the upper thread (10) is connected to the positioning ring (6), the upper end of the outer surface of the valve plate (32) is attached to the through hole (312) and the positioning shaft (313) and the two adjacent guide plates (314).

7. A quick-shutdown valve according to claim 1, characterized in that: The valve body (1) is connected to a feed pipe (8) and a discharge pipe (9) at both ends respectively. The feed pipe (8) and the discharge pipe (9) are connected to both ends of the valve cavity (2) through the valve body (1). The feed pipe (8) and the discharge pipe (9) are connected to each other through the valve seat assembly (31) in the valve cavity (2).

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