A new type of retractable gate valve

Abstract

The present invention discloses a novel retractable gate valve, including a valve stem and a valve body. The valve stem is mounted on the valve body and can rotate. A valve plate groove is provided in the middle of the valve body, and a plate storage cavity is provided in the upper part of the valve body. The valve plate is installed in the valve plate groove. The valve plate is composed of a first valve plate, a second valve plate, a third valve plate, and a fourth valve plate connected to each other by a connecting rod. Most of the valve stem is installed inside the valve body and connected to the fourth valve plate. The valve plate moves upward along the valve stem through the rotation of the valve stem. Under the action of the connecting rod, the four valve plates shrink into the cavity, thereby realizing the opening and closing of the valve. The present invention divides the valve plate into four pieces, and when opening, the four valve plates are received in the smooth cavity of the valve body. Compared with the traditional gate valve, the volume occupied by the valve body cavity is only one-third of that of the traditional gate valve. While improving the space utilization rate, it also reduces the material cost required for valve production, which is conducive to production and installation.

Description

Technical Field

[0001] The invention belongs to the technical field of gate valves, and in particular relates to a novel retractable gate valve. Background Art

[0002] The gate valve is one of the most widely used valves at present, and it plays an important role in the atomic energy, petrochemical and pharmaceutical industries, especially in the chemical industry. Its opening and closing parts (gate) move up and down in a plane perpendicular to the center line of the valve flow channel. The gate valve is generally not considered to be a throttling function, but only fully open or fully closed.

[0003] Traditional gate valves have a relatively high body height, require a large space for installation, have a bulky structure, take a long time to open and close, and during the opening and closing process, corrosive media can easily corrode the sealing surface, making maintenance difficult. These factors will increase the material cost during the production of the gate valve and limit the installation space during installation. Therefore, it is necessary to develop a gate valve that is simple to open and close, has a compact structure, and occupies a small space on the upper part of the valve body. Summary of the invention

[0004] The object of the present invention is to provide a novel retractable gate valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a new type of retractable gate valve, comprising a valve stem, a valve body, a first valve plate, a second valve plate, a third valve plate, a fourth valve plate, a retractable spring, an electromagnetic plate, a connecting rod on the valve plate, and a lower connecting rod of the valve plate, the valve stem being mounted on the valve body through a mounting hole on the valve body and rotatably connected thereto, the middle and lower parts of the valve stem being located in the valve body cavity and being a screw with external threads, a flow channel being arranged inside the valve body, a valve plate groove being arranged in the middle part of the valve body and being perpendicular to the flow channel, a storage plate cavity being arranged at the upper part of the valve body, the valve plate groove being communicated with the storage plate cavity and being an integral part of the valve body, the fourth valve plate being arranged in the valve plate groove of the valve body, a connecting portion being arranged at the bottom of one side of the fourth valve plate, the connecting portion being arranged with an internally threaded screw hole and being threadedly connected to the valve stem, the upper part of the fourth valve plate being hinged with a lower connecting rod of the valve plate, the other end of the lower connecting rod of the valve plate being hinged with a connecting rod on the valve plate, and the other end of the connecting rod on the valve plate being hinged with the third valve The bottom of the plate is hinged, the third valve plate is connected to the second valve plate in the same way through another group of valve plate lower connecting rods and valve plate upper connecting rods, the second valve plate is connected to the first valve plate in the same way through another group of valve plate lower connecting rods and valve plate upper connecting rods, the fourth valve plate, the third valve plate, the second valve plate and the first valve plate can slide up and down in the gate plate groove, and when all are located in the gate plate groove, the valve body flow channel can be completely sealed, the upward movement of the fourth valve plate can push the third valve plate to move upward, the upward movement of the third valve plate can push the second valve plate to move upward, and the upward movement of the second valve plate can push the first valve plate to move upward, the storage plate cavity is a transverse cavity and a transition channel is provided at the connection with the valve plate groove for the valve plate to pass through, the storage plate cavity is equipped with the retractable spring and the electromagnetic plate, the fourth valve plate, the third valve plate, the second valve plate and the first valve plate are all made of ferromagnetic materials.

[0006] Preferably, the first valve plate is in the overall shape of a cuboid, a centrally symmetrical step structure is provided at the lower end thereof, and a mounting hole is provided on the side.

[0007] Preferably, the second valve plate and the third valve plate are in an overall rectangular parallelepiped shape, with centrally symmetrical step structures provided at the upper and lower ends thereof and mounting holes provided on the side surfaces.

[0008] Preferably, the fourth valve plate is in the overall shape of a cuboid, a centrally symmetrical step structure is provided at the upper end thereof, and a mounting hole is provided on the side.

[0009] Preferably, the electromagnetic plate is magnetic when it is turned on, and is non-magnetic when it is closed.

[0010] Preferably, the inner wall of the cavity of the valve body storage plate is smooth and is in close contact with the upper and lower ends of the fourth valve plate, the third valve plate, the second valve plate and the first valve plate.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. Compared with the traditional gate valve, the present invention adopts a retractable gate plate, which reduces the height of the gate valve body and the volume of the valve body cavity; when opening and closing, the valve plate is not a whole piece that moves up and down in a plane perpendicular to the center line of the valve flow channel, but the valve plate is reasonably divided into four sections. During the opening process, the valve plate is successively retracted into the cavity above the valve body.

[0013] 2. The new retractable gate valve has a smaller valve body and a more compact valve body structure. While reducing the valve production cost, the valve weight is reduced, making it easier to transport and install.

[0014] 3. Compared with the traditional gate valve, the new retractable gate valve occupies less space during installation. When space is limited, the present invention provides a better choice. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the appearance of the valve of the present invention;

[0016] Figure 2 It is a side view of the valve of the present invention in a fully closed state;

[0017] Figure 3 for Figure 2 Cross-section of the middle AA;

[0018] Figure 4 for Figure 2 Cross-section of the middle BB;

[0019] Figure 5 It is a side view of the valve of the present invention in a fully open state;

[0020] Figure 6 for Figure 5 Cross-section of the middle AA;

[0021] Figure 7 for Figure 5 Cross-section of the middle BB;

[0022] Figure 8 It is a side view of the valve plate structure of the valve of the present invention in a fully closed state;

[0023] Fig. 9 It is a side view of the valve plate structure of the valve of the present invention in a fully open state;

[0024] Fig.10 It is a schematic structural diagram of the first valve plate, the second valve plate, the third valve plate and the fourth valve plate of the present invention.

[0025] In the figure: 1. valve stem; 2. valve body; 3. first valve plate; 4. second valve plate; 5. third valve plate; 6. fourth valve plate; 7. retractable spring; 8. electromagnetic plate; 9. connecting rod on valve plate; 10. connecting rod under valve plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-10The present invention provides a novel retractable gate valve, comprising a valve stem 1, a valve body 2, a first valve plate 3, a second valve plate 4, a third valve plate 5, a fourth valve plate 6, a retractable spring 7, an electromagnetic plate 8, a connecting rod 9 on the valve plate, and a connecting rod 10 under the valve plate. The valve stem 1 is mounted on the valve body 2 through a mounting hole on the valve body 2 and is rotatably connected thereto. The middle and lower part of the valve stem 1 is located in the cavity of the valve body 2, so that the part of the valve stem 1 extending out of the valve body 2 is conveniently connected to an external motor; and the valve body 2 is provided with a flow channel inside, a valve plate groove perpendicular to the flow channel is provided in the middle of the valve body 2, and a storage plate cavity is provided on the upper part of the valve body 2. The valve plate groove is connected to the storage plate cavity. The plate cavity is connected and is integrated with the valve body 2. The fourth valve plate 6 is installed in the valve plate groove of the valve body 2. A connecting portion is provided at the bottom of one side of the fourth valve plate 6. The connecting portion is provided with an internal threaded screw hole and is threadedly connected to the valve stem 1, so that the motor drives the valve stem 1 to rotate and can drive the fourth valve plate 6 to rise and fall; a valve plate lower connecting rod 10 is hinged on the upper part of the fourth valve plate 6, and the other end of the valve plate lower connecting rod 10 is hinged on the valve plate connecting rod 9, and the other end of the connecting rod 9 on the valve plate is hinged to the bottom of the third valve plate 5, so that when the fourth valve plate 6 is raised and lowered, the third valve plate 5 can be driven to rise and fall, and when the third valve plate 5 is pushed to the transition channel, the fourth valve plate 6 cooperates with the valve The connecting rod 9 on the plate and the connecting rod 10 under the valve plate can prevent the third valve plate 5 from tilting, so that it can slide smoothly to the left; the third valve plate 5 is connected to the second valve plate 4 in the same way through another set of connecting rods 10 under the valve plate and the connecting rod 9 on the valve plate, and the second valve plate 4 is connected to the first valve plate 3 in the same way through another set of connecting rods 10 under the valve plate and the connecting rod 9 on the valve plate, so that the first valve plate 3 and the second valve plate 4 can move in the same way as the third valve plate 5; the fourth valve plate 6, the third valve plate 5, the second valve plate 4 and the first valve plate 3 can slide up and down in the gate groove, and when all are located in the gate groove, the flow channel of the valve body 2 can be completely closed. Sealed, the upward movement of the fourth valve plate 6 can push the third valve plate 5 to move upward, the upward movement of the third valve plate 5 can push the second valve plate 4 to move upward, the upward movement of the second valve plate 4 can push the first valve plate 3 to move upward, the storage plate cavity is a transverse cavity and a transition channel is provided at the connection with the valve plate groove for the valve plate to pass through, the storage plate cavity is equipped with the retractable spring 7 and the electromagnetic plate 8, the fourth valve plate 6, the third valve plate 5, the second valve plate 4 and the first valve plate 3 are all made of ferromagnetic materials; the electromagnetic plate 8 can firmly absorb the valve plate and will not tip over, so that each valve plate can slide smoothly and closely.

[0028] See also Figure 3 , Figure 6 , Figure 8-10The first valve plate 3 is in the overall shape of a rectangular parallelepiped, with a centrally symmetrical step structure at its lower end and a mounting hole on the side. In this embodiment, in order to enhance its sealing performance and compactness, a mounting hole is provided on the side for mounting the connecting rod 9 on the valve plate and the connecting rod 10 under the valve plate. When the valve is closed, the fluid is prevented from leaking out of the gap between the first valve plate 3 and the second valve plate 4. And it can be retracted into the upper cavity of the valve body 2 under the driving action of the connecting rod.

[0029] See also Figure 3 , Figure 6 , Figure 8-10 The second valve plate 4 and the third valve plate 5 are rectangular in shape as a whole, with a centrally symmetrical step structure at the upper and lower ends thereof, and mounting holes on the side. In this embodiment, in order to enhance its sealing performance and compactness, threaded holes are provided on the side for installing the connecting rod 9 on the valve plate and the connecting rod 10 under the valve plate. When the valve is closed, the fluid is prevented from leaking out of the gap between the first valve plate 3, the second valve plate 4, and the third valve plate 5; and can be retracted into the upper cavity of the valve body under the driving action of the connecting rod.

[0030] See also Figure 3 , Figure 6 , Figure 8-10 The fourth valve plate 6 is in the overall shape of a rectangular parallelepiped, with a centrally symmetrical step structure at its upper end and a mounting hole on the side. In this embodiment, in order to enhance its sealing performance and compactness, a threaded hole is provided on the side for mounting the connecting rod 9 on the valve plate and the connecting rod 10 under the valve plate, so as to prevent the fluid from leaking out of the gap between the third valve plate 5 and the fourth valve plate 6 when the valve is closed.

[0031] See also Figure 1-7 The electromagnetic plate 8 is magnetic when it is opened and non-magnetic when it is closed. In this embodiment, the electromagnetic plate 8 can prevent the first valve plate 3, the second valve plate 4, the third valve plate 5, and the fourth valve plate 6 from tipping over when they move in the upper storage plate cavity of the valve body 2 when it is opened.

[0032] See also Figure 6 The inner wall of the storage plate cavity of the valve body 2 is smooth and is in close contact with the upper and lower ends of the fourth valve plate 6, the third valve plate 5, the second valve plate 4 and the first valve plate 3; in this embodiment, the stability of the fourth valve plate 6, the third valve plate 5, the second valve plate 4 and the first valve plate 3 when sliding in the storage plate cavity is further ensured.

[0033] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation mode of the present invention in the actual process is described in detail below.

[0034] Working principle: The part of the valve stem 1 extending out of the valve body 2 is connected to an external motor. When the fourth valve plate 6 reaches the lowest end of the valve stem 1, the first valve plate 3 reaches the uppermost position of the valve plate groove on the valve body 2. The first valve plate 3, the second valve plate 4, the third valve plate 5, and the fourth valve plate 6 are in the valve plate groove on the valve body 2. At this time, the gate valve is in a fully closed state. When it needs to be opened, the valve stem 1 is driven to rotate by the motor, and the fourth valve plate 6 moves upward along the valve stem 1, pushing the first valve plate 3, the second valve plate 4, and the third valve plate 5 to move upward. When the first valve plate 3 reaches the upper storage plate cavity of the valve body 2, the electromagnetic plate 8 pushes the first valve plate 3 It is sucked and moves leftward in the storage plate cavity under the push of the second valve plate 4, the connecting rod 9 on the valve plate and the connecting rod 10 under the valve plate. At the same time, the second valve plate 4, the third valve plate 5 and the fourth valve plate 6 can also enter the storage plate cavity in sequence. When the first valve plate 3, the second valve plate 4, the third valve plate 5 and the fourth valve plate 6 are all retracted into the storage plate cavity on the upper part of the valve body 2, the valve is in a fully open state. Compared with the traditional gate valve, the volume occupied by the valve body cavity is only one-third of that of the traditional gate valve. While improving the space utilization rate, it also reduces the material cost required for valve production, which is beneficial to production and installation.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel retractable gate valve, comprising a valve stem (1), a valve body (2), a first valve plate (3), a second valve plate (4), a third valve plate (5), a fourth valve plate (6), a retractable spring (7), an electromagnetic plate (8), a connecting rod on the valve plate (9), and a connecting rod below the valve plate (10), characterized in that: The valve stem (1) is mounted on the valve body (2) through a mounting hole on the valve body (2) and is rotatably connected thereto. The middle and lower part of the valve stem (1) is located in the cavity of the valve body (2) and is a screw with an external thread. A flow channel is provided inside the valve body (2). A valve plate groove perpendicular to the flow channel is provided in the middle of the valve body (2). A storage plate cavity is provided in the upper part of the valve body (2). The valve plate groove is communicated with the storage plate cavity and is integral with the valve body (2). The fourth valve plate ( 6), a connecting portion is provided at the bottom of one side of the fourth valve plate (6), the connecting portion is provided with an internal threaded screw hole and is threadedly connected to the valve stem (1), a valve plate lower connecting rod (10) is hinged on the upper part of the fourth valve plate (6), the other end of the valve plate lower connecting rod (10) is hinged to the valve plate upper connecting rod (9), the other end of the valve plate upper connecting rod (9) is hinged to the bottom of the third valve plate (5), the third valve plate (5) is connected to the third valve plate (5) through another set of valve plate lower connecting rods (10) and valve plate upper connecting rods (9) in the same way. The second valve plate (4) is connected to the first valve plate (3) in the same manner through another group of valve plate lower connecting rods (10) and valve plate upper connecting rods (9); the fourth valve plate (6), the third valve plate (5), the second valve plate (4) and the first valve plate (3) can slide up and down in the gate plate groove, and when all are located in the gate plate groove, the flow channel of the valve body (2) can be completely sealed; the upward movement of the fourth valve plate (6) can push the third valve plate (5) to move upward; the upward movement of the third valve plate (5) can push the second valve plate (4) to move upward; the upward movement of the second valve plate (4) can push the first valve plate (3) to move upward; the storage plate cavity is a transverse cavity and a transition channel is provided at the connection with the valve plate groove for the valve plate to pass through; the retractable spring (7) and the electromagnetic plate (8) are installed in the storage plate cavity; the fourth valve plate (6), the third valve plate (5), the second valve plate (4) and the first valve plate (3) are all made of ferromagnetic materials.

2. A novel retractable gate valve according to claim 1, characterized in that: The first valve plate (3) is in the shape of a rectangular parallelepiped as a whole, with a centrally symmetrical step structure provided at its lower end and a mounting hole provided on the side.

3. A novel retractable gate valve according to claim 1, characterized in that: The second valve plate (4) and the third valve plate (5) are in the overall shape of a rectangular parallelepiped, with centrally symmetrical step structures provided at the upper and lower ends thereof and mounting holes provided on the side surfaces.

4. A novel retractable gate valve according to claim 1, characterized in that: The fourth valve plate (6) is in the shape of a rectangular parallelepiped as a whole, with a centrally symmetrical step structure provided at its upper end and a mounting hole provided on its side.

5. A novel retractable gate valve according to claim 1, characterized in that: The electromagnetic plate (8) is magnetic when it is turned on, and is non-magnetic when it is turned off.

6. A novel retractable gate valve according to claim 1, characterized in that: The inner wall of the storage plate cavity of the valve body (2) is smooth and is in close contact with the upper and lower ends of the fourth valve plate (6), the third valve plate (5), the second valve plate (4) and the first valve plate (3).

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