Pipe quick-change blind plate valve

Abstract

This utility model belongs to the field of valve technology, and particularly relates to a quick-cut blind valve for pipelines, comprising: a valve body, a plate, a drive mechanism, a mounting base, a sealing seat, and an adjusting mechanism; the valve body has connecting parts at both ends for connecting to pipelines, and the valve body has a medium channel penetrating both ends, with an opening and closing groove provided on the side wall of the medium channel, the opening and closing groove penetrating the outer wall of the valve body; the plate is slidably disposed in the opening and closing groove, and the plate can cut off or open the medium channel during sliding; the drive mechanism is used to drive the plate to slide in the opening and closing groove; the mounting base is disposed on the valve body, and the mounting base is provided with a mounting groove, which is connected to the opening and closing groove through a connecting groove; the sealing seat is slidably disposed in the mounting groove along a sliding direction perpendicular to the plate, and one end of the sealing seat can pass through the connecting groove and abut against the other side wall of the opening and closing groove, at which time the sealing seat seals the entire opening and closing groove in the sliding direction; the adjusting mechanism is used to drive the sealing seat to move in the sliding direction; compared with the prior art, the blind valve of this utility model has a compact structure, reliable sealing, is suitable for high temperature and high pressure conditions, and can quickly cut off or open pipeline fluid.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and in particular relates to a quick-cut blind valve for pipelines. Background Technology

[0002] A blind flange valve, also known as a slide gate valve or spectacle valve, is a shut-off device used in industrial piping systems. It is primarily used to completely isolate or allow fluid flow through a pipeline. A key feature of a blind flange valve is that its closing element is a single plate, which can be manually, electrically, pneumatically, or otherwise driven to move laterally within the pipeline to open and close.

[0003] When blind valves are used in high temperature and high pressure environments, gaps can easily form between the blind plate and the inner wall of the valve body due to the difference in expansion coefficients. This reduces the sealing performance of the blind valve and affects the fluid shut-off effect. Therefore, it is necessary to improve the existing blind valve structure. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned technical problems by providing a quick-cut blind valve for pipelines. This blind valve has a compact structure, reliable sealing, is suitable for high-temperature and high-pressure conditions, and can quickly cut off or open pipeline fluid.

[0005] In view of this, the present invention provides a quick-cut blind valve for pipelines, comprising: The valve body has connecting parts at both ends for connecting to pipelines. The valve body has a medium channel that runs through both ends. The side wall of the medium channel is provided with an opening and closing groove that runs through the outer wall of the valve body. The plate body is slidably set in the opening and closing groove, and the plate body can cut off or open the medium channel during the sliding process; The drive mechanism is used to drive the plate to slide in the opening and closing slot; Mounting seat, the mounting seat is set on the valve body, the mounting seat is provided with a mounting groove, the mounting groove is connected to the opening and closing groove through a connecting groove; The sealing seat is slidably installed in the mounting groove along the sliding direction perpendicular to the plate. One end of the sealing seat can pass through the connecting groove and abut against the other side wall of the opening and closing groove. At this time, the sealing seat seals the entire opening and closing groove in the sliding direction. Adjustment mechanism, used to drive the sealing seat to move in the sliding direction.

[0006] In this technical solution, when the plate body cuts off the medium channel, one end of the sealing seat passes through the connecting groove and extends into the opening and closing groove, abutting against the side wall of the plate body. At this time, the sealing seat and the plate body cooperate to form a seal on the opening and closing groove. When the plate body opens the medium channel, the plate body moves away from the sealing seat in the sliding direction, and one end of the sealing seat abuts against the side wall of the opening and closing groove away from the connecting groove. At this time, the sealing seat and the side wall of the opening and closing groove cooperate to form a seal on the opening and closing groove. In this way, a reliable seal can be formed regardless of whether the blind valve is in the open or closed state, which is suitable for high temperature and high pressure conditions.

[0007] In the above technical solution, the driving mechanism further includes: A connecting plate, the first end of which is connected to the plate body, and the second end of which extends out of the opening and closing groove; The drive rod consists of a long rod section and a short rod section. The connection between the long rod section and the short rod section is rotatably connected to the valve body. The short rod section is connected to the second end of the connecting plate. The long rod section drives the short rod section to swing around the same axis, thereby driving the plate body to slide in the opening and closing groove through the connecting plate.

[0008] In the above technical solution, a first retraction groove is provided on the short rod segment, and a first connecting post is provided on the connecting plate. The first connecting post is slidably disposed in the first retraction groove, and the first connecting post can move in the first retraction groove in a direction perpendicular to the swing of the short rod segment.

[0009] In the above technical solution, a drive cylinder is further provided on one side of the valve body, and the drive cylinder has a piston rod that can move linearly, and the piston rod is connected to the end of the long rod section.

[0010] In the above technical solution, a second retraction groove is further provided on the long rod section, and a second connecting post is provided on the piston rod. The second connecting post is slidably disposed in the second retraction groove, and the second connecting post can move in the second retraction groove in a direction perpendicular to the swing of the long rod section.

[0011] In the above technical solution, further, the distance from the second connecting post to the swing axis of the long rod segment is greater than the distance from the first connecting post to the swing axis of the short rod segment.

[0012] In the above technical solution, the adjusting mechanism further includes: The elastic element is located between the sealing seat and the side wall of the mounting groove. When the sealing seat is separated from the side wall of the opening and closing groove, the elastic element is under stress. The air intake pipe is mounted on the mounting base and is connected to the side of the sealing seat near the connecting groove. The air intake pipe can be connected to the air supply equipment, thereby driving the sealing seat to move away from the connecting groove.

[0013] The beneficial effects of this utility model are: 1. By cooperating with the sealing seat and the adjustment mechanism, the thermal expansion gap is automatically compensated under high temperature and high pressure, thereby improving the sealing reliability.

[0014] 2. The drive mechanism adopts the lever principle, which reduces the driving force requirement, improves the response speed, and also reduces the working load of the drive cylinder, thus reducing energy consumption.

[0015] 3. Stable thrust is provided by the drive cylinder to ensure rapid movement of the plate. In addition, through the cooperation of the elastic element and the start-up adjustment drive, the operator can remotely control the opening and closing of the blind valve, which improves the safety of the blind valve under high temperature and high pressure conditions. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 .

[0019] Figure 3 This is a schematic diagram of the main structure of this utility model.

[0020] Figure 4 This is a schematic diagram of the blind valve cutting off the medium channel in this utility model.

[0021] Figure 5 This is a schematic diagram of the process by which the blind valve in this utility model opens the medium channel.

[0022] Figure 6 This is a schematic diagram showing the state of the medium channel of the blind valve in this utility model.

[0023] Figure 7 This is a schematic diagram of the sealing seat and the plate body sealing together in this utility model.

[0024] Figure 8 This is a schematic diagram of the sealing seat and the side wall of the opening and closing groove in this utility model for sealing.

[0025] Figure 9 These are schematic diagrams of two cross-sectional structures of the sealing seat in this utility model.

[0026] The markings in the diagram are as follows: 1. Valve body; 2. Connecting part; 3. Medium passage; 4. Opening and closing groove; 5. Plate; 6. Connecting plate; 7. Drive rod; 701. Long rod section; 7011. Second retraction groove; 702. Short rod section; 7021. First retraction groove; 801. First connecting column; 802. Second connecting column; 9. Drive cylinder; 10. Piston rod; 11. Mounting seat; 12. Sealing seat; 13. Elastic element; 14. Air inlet pipe; 15. Air supply equipment. Detailed Implementation

[0027] 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.

[0028] In the description of this utility model, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0029] Example 1 like Figures 1-8 As shown, this embodiment provides a quick-cut blind valve for pipelines, including: valve body 1, plate body 5, drive mechanism, mounting base 11, sealing base 12, and adjustment mechanism; Please see Figure 1 and Figure 2 The valve body 1 has connecting parts 2 at both ends for connecting to pipelines. Specifically, the connecting parts 2 include flanges welded to the ends of the valve body 1, which are connected to the pipelines. The valve body 1 has a medium channel 3 that runs through both ends. The side wall of the medium channel 3 is provided with an opening and closing groove 4. The opening and closing groove 4 is distributed along the axial direction perpendicular to the medium channel 3 and runs through the outer wall of the valve body 1. The plate 5 is slidably disposed in the opening and closing groove 4, and the plate 5 can cut off or open the medium channel 3 during the sliding process; The driving mechanism is used to drive the plate 5 to slide in the opening and closing groove 4. Any existing structure that can drive the plate 5 to slide stably back and forth in the opening and closing groove 4 can be used as the driving mechanism in this embodiment. Please see Figure 1 Mounting base 11 is detachably mounted on valve body 1. Please refer to [link / reference]. Figure 7 and Figure 8 The mounting base 11 is provided with a mounting groove, which can be a rectangular groove or an arc groove. The mounting groove is connected to the opening and closing groove 4 through a connecting groove. The connecting groove can be a rectangular groove or an arc groove. The shape of the connecting groove is adapted to the shape of the mounting groove, but the size of the connecting groove is smaller than the size of the mounting groove. The sealing seat 12 is L-shaped overall. Please refer to [link / reference]. Figure 9 The bottom surface of the sealing seat 12 is adapted to the shape of the mounting groove and the connecting groove; it can be a flat surface or a curved surface. The sealing seat 12 is slidably disposed in the mounting groove along a sliding direction perpendicular to the sliding direction of the plate 5. Please refer to [link / reference]. Figure 7 When the plate 5 cuts off the medium channel 3, one end of the sealing seat 12 can pass through the connecting groove and abut against the side wall of the plate 5. At this time, the sealing seat 12 and the plate 5 cooperate to seal the entire opening and closing groove 4; please refer to Figure 8 When the medium channel 3 is connected to the plate 5, one end of the sealing seat 12 can pass through the connecting groove and abut against the other side wall of the opening and closing groove 4. At this time, the sealing seat 12 seals the entire opening and closing groove 4 in the sliding direction. During the transition from the state of cutting off the medium channel 3 to the state of opening the medium channel 3, the plate body 5 slides relative to the sealing seat 12. During this process, the sealing seat 12 remains in contact with the plate body 5. When the plate body 5 separates from the sealing seat 12, the sealing seat 12, driven by the adjusting mechanism, will abut against the side wall of the opening / closing groove 4, i.e., from... Figure 7 Switching to Figure 8 The state; The adjusting mechanism is used to drive the sealing seat 12 to move in the sliding direction, and the adjusting mechanism cooperates with the sealing seat 12 to realize automatic compensation for thermal expansion and ensure the long-term sealing of the blind valve. In this embodiment, sealing the entire opening and closing groove 4 means that the width of the sealing seat 12 is adapted to the width of the opening and closing groove 4, and the sealing seat 12 moves in the sliding direction through the drive of the adjustment mechanism to block the opening and closing groove 4. In this embodiment, the adjustment mechanism includes: an elastic element 13 and an air intake pipe 14; Please see Figure 7 and Figure 8The elastic element 13 is disposed between the sealing seat 12 and the side wall of the mounting groove. When the sealing seat 12 is separated from the side wall of the opening and closing groove 4, the elastic element 13 is under stress. Of course, the elastic element 13 can also be under stress when the sealing seat 12 abuts against the side wall of the opening and closing groove 4. For example, a guide rod is provided on the sealing seat 12. The guide rod is slidably connected to the mounting seat 11. The sealing seat 12 can slide in the mounting groove and the connecting groove through the guide rod. The elastic element 13 can be a high-temperature alloy spring. The elastic element 13 is sleeved on the guide rod. In order to reduce the overall volume of the adjustment mechanism, one end of the guide rod can extend out of the mounting seat 11. The intake pipe 14 is mounted on the mounting base 11. The intake pipe 14 is connected to the side of the sealing seat 12 near the connecting groove. The intake pipe 14 can be connected to the air supply device 15, thereby driving the sealing seat 12 to move away from the connecting groove. The air supply device 15 is a commercially available product, such as an air compressor. The intake pipe 14 is connected to the air supply device 15 through a hose. An exhaust valve can be installed on the intake pipe 14 or the hose. Please see Figure 8 When the sealing seat 12 abuts against the side wall of the opening and closing groove 4, a gas cavity is formed between the sealing seat 12 and the side wall of the mounting groove. The air inlet pipe 14 is connected to the gas cavity. When the plate body 5 needs to switch from the state of conducting medium channel 3 to cutting off medium channel 3, the air supply device 15 supplies air to the gas cavity through the hose and the air inlet pipe 14. During this process, the sealing seat 12 is pushed away from the opening and closing groove 4, and the elastic element 13 is squeezed and stressed. When the space between the sealing seat 12 and the side wall of the opening and closing groove 4 is large enough for the plate body 5 to pass through, the plate body 5 passes through the space under the drive of the drive mechanism to cut off the medium channel 3. Then, the gas in the gas cavity is discharged through the exhaust valve. At this time, the sealing seat 12 will be pressed tightly against the plate body 5 under the elastic force of the elastic element 13, and a pushing force will be given to the plate body 5 to make the plate body 5 fit against the side wall of the opening and closing groove 4, to compensate for the thermal expansion gap and improve the sealing reliability.

[0030] Example 2 Based on Embodiment 1, this embodiment also discloses a structure of the drive mechanism; In this embodiment, the driving mechanism includes: a connecting plate 6 and a driving rod 7; Please see Figures 4-6 The first end of the connecting plate 6 is connected to the plate body 5, and the second end of the connecting plate 6 extends out of the opening and closing groove 4; Please see Figures 4-6The drive rod 7 is L-shaped and includes a long rod section 701 and a short rod section 702. The long rod section 701 and the short rod section 702 are vertically distributed. The length of the long rod section 701 is greater than the length of the short rod section 702. A hinge seat is provided on the valve body 1. The connection between the long rod section 701 and the short rod section 702 is rotatably connected to the hinge seat. The short rod section 702 is connected to the second end of the connecting plate 6. The long rod section 701 drives the short rod section 702 to swing around the same axis, thereby driving the plate body 5 to slide in the opening and closing groove 4 through the connecting plate 6. In this embodiment, a first retraction groove 7021 is provided on the short rod segment 702, and a first connecting post 801 is provided on the connecting plate 6. The length of the first retraction groove 7021 is greater than the diameter of the first connecting post 801, and the width of the first retraction groove 7021 is adapted to the diameter of the first connecting post 801. The first connecting post 801 is slidably disposed in the first retraction groove 7021. During the swinging process of the short rod segment 702, the first connecting post 801 can move in the first retraction groove 7021 in a direction perpendicular to the swinging direction of the short rod segment 702, thereby compensating for the displacement of the short rod segment 702 in the horizontal direction during the swinging process. In this embodiment, a drive cylinder 9 is provided on one side of the valve body 1. The drive cylinder 9 is installed on a building or support fixed to the position of the valve body 1. The drive cylinder 9 has a piston rod 10 that can move linearly. The piston rod 10 is connected to the end of the long rod section 701. For example, the drive cylinder 9 can be a pneumatic cylinder. The pneumatic cylinder cooperates with the air supply equipment to drive the piston rod 10 to move linearly, thereby pushing the long rod section 701 to swing. The air supply equipment can be a commercially available product that cooperates with the pneumatic cylinder. In this embodiment, a second retraction groove 7011 is provided on the long rod segment 701, and a second connecting post 802 is provided on the piston rod 10. The length of the second retraction groove 7011 is greater than the diameter of the second connecting post 802, and the width of the second retraction groove 7011 is adapted to the diameter of the second connecting post 802. The second connecting post 802 is slidably disposed in the second retraction groove 7011. During the swinging process of the long rod segment 701, the second connecting post 802 can move in the second retraction groove 7011 in a direction perpendicular to the swinging direction of the long rod segment 701, thereby compensating for the displacement of the long rod segment 701 in the vertical direction during the swinging process. The distance from the second connecting post 802 to the swing axis of the long rod segment 701 is greater than the distance from the first connecting post 801 to the swing axis of the short rod segment 702. In this way, the long rod segment 701, the short rod segment 702 and the hinge connection point form a lever structure, which reduces the driving force requirement, improves the response speed, and also reduces the working load of the drive cylinder 9 and reduces energy consumption.

[0031] The embodiments of the present invention have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A quick-cut blind flange valve for pipelines, characterized in that, include: The valve body (1) has connecting parts (2) for connecting pipes at both ends. The valve body (1) has a medium channel (3) that passes through both ends. An opening and closing groove (4) is provided on the side wall of the medium channel (3). The opening and closing groove (4) passes through the outer wall of the valve body (1). Plate (5), the plate (5) is slidably disposed in the opening and closing groove (4), and the plate (5) can cut off or open the medium channel (3) during the sliding process; A driving mechanism is provided for driving the plate (5) to slide in the opening and closing groove (4); Mounting seat (11), the mounting seat (11) is disposed on the valve body (1), the mounting seat (11) is provided with a mounting groove, the mounting groove is connected to the opening and closing groove (4) through a connecting groove; Sealing seat (12) is slidably disposed in the mounting groove along the sliding direction perpendicular to the plate (5). One end of the sealing seat (12) can pass through the connecting groove and abut against the other side wall of the opening and closing groove (4). At this time, the sealing seat (12) seals the entire opening and closing groove (4) in the sliding direction. An adjustment mechanism is provided to drive the sealing seat (12) to move in the sliding direction.

2. The quick-cut blind valve for pipelines according to claim 1, characterized in that, The drive mechanism includes: A connecting plate (6), the first end of which is connected to the plate body (5), and the second end of which extends out of the opening and closing groove (4); The drive rod (7) includes a long rod section (701) and a short rod section (702). The connection between the long rod section (701) and the short rod section (702) is rotatably connected to the valve body (1). The short rod section (702) is connected to the second end of the connecting plate (6). The long rod section (701) swings the short rod section (702) along the same axis, thereby driving the plate body (5) to slide in the opening and closing groove (4) through the connecting plate (6).

3. The quick-cut blind valve for pipelines according to claim 2, characterized in that: The short rod segment (702) is provided with a first retraction groove (7021), and the connecting plate (6) is provided with a first connecting post (801). The first connecting post (801) is slidably disposed in the first retraction groove (7021), and the first connecting post (801) can move in the first retraction groove (7021) in a direction perpendicular to the swing of the short rod segment (702).

4. The quick-cut blind valve for pipelines according to claim 3, characterized in that: A drive cylinder (9) is provided on one side of the valve body (1), and the drive cylinder (9) has a piston rod (10) that can move linearly. The piston rod (10) is connected to the end of the long rod section (701).

5. The quick-cut blind valve for pipelines according to claim 4, characterized in that: The long rod segment (701) is provided with a second retraction groove (7011), and the piston rod (10) is provided with a second connecting post (802). The second connecting post (802) is slidably disposed in the second retraction groove (7011), and the second connecting post (802) can move in the second retraction groove (7011) in a direction perpendicular to the swing of the long rod segment (701).

6. The quick-cut blind valve for pipelines according to claim 5, characterized in that: The distance from the second connecting post (802) to the swing axis of the long rod segment (701) is greater than the distance from the first connecting post (801) to the swing axis of the short rod segment (702).

7. The quick-cut blind valve for pipelines according to claim 1, characterized in that, The adjustment mechanism includes: Elastic element (13) is disposed between the sealing seat (12) and the side wall of the mounting groove. When the sealing seat (12) is separated from the side wall of the opening and closing groove (4), the elastic element (13) is under stress. An air inlet pipe (14) is provided on the mounting base (11). The air inlet pipe (14) is connected to the side of the sealing seat (12) near the connecting groove. The air inlet pipe (14) can be connected to an air supply device (15), thereby driving the sealing seat (12) to move away from the connecting groove.

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