A zero-leak gate valve

Abstract

The utility model discloses a zero leakage knife gate valve, it includes support, is equipped with the valve body in support bottom, both sides of support top are equipped with the support plate, is equipped with the cylinder in the support plate top, is equipped with the valve plate in the cylinder output, is equipped with the sealing assembly in the valve body circumference inner wall bottom, both sides of support side wall are equipped with the connecting component, this kind of zero leakage knife gate valve, through opening cylinder drives valve plate to move and passes through the slot and enters the containing groove, the convenient control fluid medium flow, the sealed ring is wrapped valve plate conveniently, effectively improves the sealing effect, after long -term use, the dial dial plate drives two moving plates to move inwards simultaneously to make the sealing plate move and separate from the recess, takes out the mounting ring and extracts the sealed ring and carries out the replacement, avoids the sealed ring wear and tear and influences the sealing effect, and the mounting ring is more closely attached with the valve body, improves the sealing performance, secondly, the external pipeline is inserted into the mounting groove, and the connecting component is convenient for improving the stability, makes the knife gate valve installation more convenient.

Description

Technical Field

[0001] This utility model relates to the field of knife gate valve technology, specifically a zero-leakage knife gate valve. Background Technology

[0002] Knife gate valves, also known as knife gate valves, slurry valves, or mud valves, have a gate as their opening and closing element. The gate moves in a direction perpendicular to the fluid direction. They cut off the medium by using a knife-shaped gate that can cut through fibrous materials. As a widely used pipeline system in medical, food, and hygiene fields, zero-leakage knife gate valves are required to prevent leakage during use.

[0003] The prior art patent document CN111237490B discloses a zero-leakage knife gate valve, including a push valve stem and a bracket. A valve stem hole is provided on one side of the bracket, and a pneumatic cylinder is provided at one end of the bracket. The push valve stem is slidably connected to a sliding seat through a sliding hole. A valve plate is fixedly connected to the sliding seat through a through groove and bolts. A bracket is fixedly connected to the side of the bracket away from the valve stem hole. A support plate is provided on the upper surface of the bracket, and a circular through hole is provided on the upper surface of the support plate. An arc-shaped wedge is fixedly connected inside the circular through hole. A wedge-shaped angle is provided on the lower surface of the valve plate to contact the arc-shaped wedge. A second connecting seat is fixedly connected to the outer circular surface of the bracket. A semi-sealing cover is fixedly connected to the bracket by a threaded rod and a nut. A metal ring and a rubber ring are fixedly connected to the semi-sealing cover through a semi-circular through hole, a lower clamping ring, and an upper clamping ring. This high-performance zero-leakage knife gate valve allows for easy replacement of the metal ring and rubber ring.

[0004] Although the device has many beneficial effects, the following problems still exist: During the use of the device, the rubber ring is only on one side of the valve plate, and the sealing effect is not good enough. The semi-sealed cover itself does not fit tightly with the valve body, affecting the sealing performance. Secondly, it is not convenient to connect the valve body to external pipelines during the use of the device, and the knife gate valve is not convenient to install. It needs to be improved. In view of this, we propose a zero-leakage knife gate valve. Utility Model Content

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0006] 1. Technical problems to be solved:

[0007] To address the issues mentioned above, such as the rubber ring being only on one side of the valve plate resulting in insufficient sealing, the semi-sealed cover not fitting tightly enough to the valve body, affecting sealing performance, and the inconvenience of connecting the valve body to external pipelines and making the knife gate valve installation inconvenient, this utility model is proposed.

[0008] Therefore, the purpose of this utility model is to provide a zero-leakage knife gate valve, which facilitates the rubber ring to wrap around the valve plate, effectively improving the sealing effect. The mounting ring fits more tightly with the valve body, improving the sealing performance. It also facilitates the connection of the valve body to external pipelines, making the knife gate valve installation more convenient.

[0009] 2. Technical Solution:

[0010] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0011] A zero-leakage gate valve includes a bracket, a valve body at the bottom of the bracket, support plates on both sides of the top of the bracket, a cylinder on the top of the support plate, a valve plate at the output end of the cylinder, a sealing assembly on the bottom of the inner circumference of the valve body, the sealing assembly including a mounting ring, a sealing ring on the top of the inner circumference of the mounting ring, a receiving groove on the inner circumference of the sealing ring, a slot on the top of the outer circumference of the sealing ring, sliding grooves on both side walls of the mounting ring, multiple springs on the inner walls of the two sliding grooves, a moving plate at the other end of each spring, a sealing plate on the other side wall of the moving plate, a lever on the bottom of the outer circumference of the moving plate, grooves on the bottom of both side walls of the valve body cavity, connecting assemblies on both side walls of the bracket, and the cylinder connected to an external air pump via an air pipe. The valve plate is inserted into the slot so that the sealing ring fits against both sides of the valve plate, allowing the valve plate to maintain a seal even when moved to different positions.

[0012] In a preferred embodiment of the zero-leakage gate valve of this utility model, the connecting assembly includes a worm gear rotatably connected to the side wall of the support. The worm gear meshes with a worm wheel, and a lead screw is provided on the inner circumference of the worm wheel. A clamping plate is threaded onto the outer circumference of the lead screw. Mounting grooves are provided at both ends of the inner circumference of the valve body, and multiple threaded holes are provided on both side walls of the valve body. The threaded holes are distributed on the lower part of the side walls of the valve body to prevent screws from interfering with the movement of the clamping plate.

[0013] In a preferred embodiment of the zero-leakage gate valve of this utility model, the size and position of the valve plate match the size and position of the slot, the bottom of the valve plate is semi-circular, and the size and position of the bottom of the valve plate match the size and position of the receiving groove.

[0014] In a preferred embodiment of this zero-leakage knife gate valve, the dimensions and position of the sealing plate match the dimensions and position of the groove, and both the sealing ring and the sealing plate are made of silicone rubber. Silicone rubber has good weather resistance, preventing corrosion from different fluid media from affecting the service life of the sealing ring and sealing plate.

[0015] In a preferred embodiment of the zero-leakage knife gate valve of this utility model, the lead screw is rotatably connected to the inside of the valve body, and the cross-section of the clamping plate is arc-shaped.

[0016] As a preferred embodiment of the zero-leakage knife gate valve of this utility model, one end of the worm gear is provided with a handle, and the outer wall of the handle is provided with multiple raised stripes.

[0017] As a preferred embodiment of the zero-leakage knife gate valve of this utility model, the mounting ring is provided with first connecting blocks at both ends of its outer circumference, and the bracket is provided with second connecting blocks at the bottom of both side walls, with bolts threaded to the top of the second connecting blocks.

[0018] 3. Beneficial effects:

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This zero-leakage knife gate valve moves the valve plate through the slot into the receiving groove by opening the cylinder, which facilitates the control of fluid medium flow and makes it easier for the sealing ring to wrap around the valve plate, effectively improving the sealing effect. After long-term use, the toggle plate moves the two moving plates inward at the same time, so that the sealing plate moves out of the groove, and the installation ring can be removed and the sealing ring can be pulled out for replacement. The spring rebound force moves the moving plates to reset, so that the sealing plate moves into the groove. Disassembly and assembly are simpler, avoiding the sealing ring wear from affecting the sealing effect. The installation ring fits more tightly with the valve body, improving the sealing performance.

[0021] This type of zero-leakage knife gate valve inserts the external pipeline into the installation groove. By rotating the worm gear, the worm wheel is driven to rotate, which in turn causes the screw to rotate and move the clamping plate downward to clamp the external pipeline. The screw is then screwed into the bolt hole through the flange installed on the outer circumference of the external pipeline, which improves stability and makes the knife gate valve installation more convenient. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. 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. Among them:

[0023] Figure 1This is a schematic diagram of the overall structure of a zero-leakage knife gate valve according to this utility model;

[0024] Figure 2 This is a schematic diagram showing the disassembled structure of the sealing assembly of a zero-leakage knife gate valve according to this utility model;

[0025] Figure 3 This is a cross-sectional schematic diagram of the mounting ring structure of a zero-leakage knife gate valve according to this utility model;

[0026] Figure 4 This is a cross-sectional schematic diagram of the sealing ring structure of a zero-leakage knife gate valve according to this utility model;

[0027] Figure 5 This is a schematic diagram of the connection component structure of a zero-leakage knife gate valve according to this utility model.

[0028] The following are the labels in the diagram: 1. Bracket; 2. Valve body; 3. Support plate; 4. Cylinder; 5. Valve plate; 6. Sealing assembly; 7. Connecting assembly; 8. Second connecting block; 9. Bolt; 601. Mounting ring; 602. Sealing ring; 603. Receiving groove; 604. Slot; 605. Slide groove; 606. Spring; 607. Moving plate; 608. Sealing plate; 609. Pulley; 610. First connecting block; 701. Worm gear; 702. Worm wheel; 703. Lead screw; 704. Clamping plate; 705. Mounting groove; 706. Screw hole; 707. Handle. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] This utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this utility model. In actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0031] The orientation or positional relationship indicated in the terminology is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0032] The term "connection method" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0034] This utility model provides an overall structural schematic diagram of an embodiment of a zero-leakage knife gate valve, including:

[0035] Please see Figures 1-5 This embodiment of a zero-leakage gate valve includes a bracket 1, a valve body 2 fixedly mounted at the bottom of the bracket 1, support plates 3 welded to both sides of the top of the bracket 1, a cylinder 4 fixedly mounted on the top of the support plate 3, a valve plate 5 fixedly mounted at the output end of the cylinder 4, a sealing assembly 6 snapped onto the bottom of the inner circumference of the valve body 2, the sealing assembly 6 including a mounting ring 601, a sealing ring 602 fixedly mounted on the top of the inner circumference of the mounting ring 601, a receiving groove 603 formed on the inner circumference of the sealing ring 602, a slot 604 formed on the top of the outer circumference of the sealing ring 602, sliding grooves 605 formed on both side walls of the mounting ring 601, multiple springs 606 fixedly mounted on the inner walls of both sliding grooves 605, a moving plate 607 fixedly mounted at the other end of the springs 606, a sealing plate 608 fixedly mounted on the other side wall of the moving plate 607, and a lever 609 fixedly mounted on the bottom of the outer circumference of the moving plate 607. The valve body 2 has grooves on the bottom of both sides of the inner cavity. The bracket 1 has connecting components 7 slidably connected to both sides of the inner cavity. The cylinder 4 is connected to the external air pump through an air pipe. By opening the cylinder 4, the valve plate 5 is moved through the slot 604 and into the receiving groove 603, which facilitates the control of fluid medium flow and makes it easier for the sealing ring 602 to wrap around the valve plate, effectively improving the sealing effect. After long-term use, the toggle plate 609 moves the two moving plates 607 inward at the same time, so that the sealing plate 608 moves out of the groove. The installation ring 601 is removed and the sealing ring 602 is pulled out for replacement. The spring 606 pushes the moving plate 607 to move and reset, so that the sealing plate 608 moves into the groove. The disassembly and assembly are more convenient, avoiding the wear of the sealing ring 602 from affecting the sealing effect. The installation ring 601 fits more tightly with the valve body 2, improving the sealing performance.

[0036] It is worth noting that, in order to facilitate the installation of the knife gate valve and external pipelines, the connecting assembly 7 specifically includes a worm gear 701 rotatably connected to the side wall of the bracket 1. The worm gear 701 meshes with a worm wheel 702. A lead screw 703 is fixed on the inner circumference of the worm wheel 702. A clamping plate 704 is threadedly connected to the outer circumference of the lead screw 703. Both ends of the inner circumference of the valve body 2 are provided with mounting grooves 705. Multiple screw holes 706 are provided on both sides of the valve body 2. The external pipeline is inserted into the mounting groove 705. By rotating the worm gear 701, the worm wheel 702 is rotated, thereby causing the lead screw 703 to rotate and move the clamping plate 704 downward to clamp the external pipeline. The screw passes through the flange installed on the outer circumference of the external pipeline and is screwed into the screw hole 706, which improves stability and makes the installation of the knife gate valve more convenient.

[0037] Next, in order to facilitate the sealing of the inner cavity of the valve body 2, specifically, the size and position of the valve plate 5 are matched with the size and position of the slot 604. The bottom of the valve plate 5 is semi-circular, and the size and position of the bottom of the valve plate 5 are matched with the size and position of the receiving groove 603. By matching the size and position of the valve plate 5 with the receiving groove 603, it is easier to make the valve plate 5 seal the inner cavity of the valve body 2 more fully and avoid leakage.

[0038] Meanwhile, in order to facilitate improved sealing performance, the dimensions and position of the sealing plate 608 are matched with the dimensions and position of the groove. Both the sealing ring 602 and the sealing plate 608 are made of silicone rubber. The sealing plate 608, which matches the dimensions and position of the groove, facilitates a tighter installation and prevents the installation ring 601 from shaking and affecting the sealing performance. The silicone rubber sealing ring 602 and the sealing plate 608 effectively improve the sealing effect.

[0039] Furthermore, to facilitate the connection between the gate valve and the external pipeline, specifically, the lead screw 703 is rotatably connected to the valve body 2, and the cross-section of the clamp 704 is arc-shaped. The arc-shaped clamp 704 is easy to adapt to the shape of the external pipeline, making the connection between the zero-leakage gate valve and the external pipeline tighter.

[0040] It is worth noting that, in order to facilitate the use of the staff, a handle 707 is fixedly provided at one end of the worm 701. Multiple raised stripes are fixedly provided on the outer circumference of the handle 707. The raised stripes on the outer circumference of the handle 707 facilitate the increase of friction, making it easier for the staff to turn the handle 707 to drive the worm 701 to rotate.

[0041] Finally, to facilitate the installation of the mounting ring 601, specifically, the two ends of the outer circumference of the mounting ring 601 are welded with a first connecting block 610, and the bottom of the side walls of the bracket 1 are welded with a second connecting block 8. The top of the second connecting block 8 is threaded with a bolt 9. By screwing in the bolt 9, the first connecting block 610 and the second connecting block 8 are threadedly connected, which makes the installation of the mounting ring 601 more stable.

[0042] In addition, the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. Furthermore, the scope of protection of this utility model does not involve improvements to the internal structure and methods.

[0043] The device or equipment models mentioned in this article may be as follows:

[0044] Cylinder 4: CA2Y-Z40.

[0045] Combination Figures 1-5 The zero-leakage knife gate valve of this embodiment is used in the following specific process:

[0046] 1: When this device is needed to be used as a zero-leakage knife gate valve, the starting cylinder 4 drives the valve plate 5 to move through the slot 604 and into the receiving groove 603 to control the flow of fluid medium. After long-term use, the toggle plate 609 drives the two moving plates 607 to move inward at the same time, so that the sealing plate 608 moves out of the groove. The mounting ring 601 is removed and the sealing ring 602 is pulled out for replacement. The rebound force of the spring 606 drives the moving plate 607 to move and reset, so that the sealing plate 608 moves into the groove.

[0047] 2: Insert the external pipe into the mounting slot 705, rotate the worm gear 701 to drive the worm wheel 702 to rotate, thereby causing the lead screw 703 to rotate and drive the clamping plate 704 to move downward to clamp the external pipe. The screw passes through the flange installed on the outer circumference of the external pipe and is screwed into the screw hole 706.

[0048] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A zero-leakage knife gate valve, characterized in that, The bracket (1) is characterized in that: a valve body (2) is provided at the bottom of the bracket (1), support plates (3) are provided on both sides of the top of the bracket (1), a cylinder (4) is provided at the top of the support plate (3), a valve plate (5) is provided at the output end of the cylinder (4), a sealing assembly (6) is provided at the bottom of the inner circumference of the valve body (2), the sealing assembly (6) includes an installation ring (601), a sealing ring (602) is provided at the top of the inner circumference of the installation ring (601), a receiving groove (603) is opened on the inner circumference of the sealing ring (602), and a receiving groove (603) is opened on the top of the outer circumference of the sealing ring (602). The mounting ring (601) has a slot (604) and two side walls of the mounting ring (601) have a sliding groove (605). The inner walls of the two sliding grooves (605) are provided with multiple springs (606). The other end of the spring (606) is provided with a moving plate (607). The other side wall of the moving plate (607) is provided with a sealing plate (608). The bottom of the outer circumference of the moving plate (607) is provided with a lever plate (609). The bottom of the two side walls of the inner cavity of the valve body (2) is provided with a groove. The two side walls of the bracket (1) are provided with connecting components (7). The cylinder (4) is connected to the external air pump through an air pipe.

2. The zero-leakage knife gate valve according to claim 1, characterized in that, The connecting assembly (7) includes a worm gear (701) rotatably connected to the side wall of the bracket (1), the worm gear (701) meshing with a worm wheel (702), the inner circumference of the worm wheel (702) being provided with a lead screw (703), the outer circumference of the lead screw (703) being threadedly connected with a clamping plate (704), both ends of the inner circumference of the valve body (2) being provided with mounting grooves (705), and both sides of the valve body (2) being provided with multiple screw holes (706).

3. The zero-leakage knife gate valve according to claim 2, characterized in that, The size and position of the valve plate (5) match the size and position of the slot (604). The bottom of the valve plate (5) is semi-circular, and the size and position of the bottom of the valve plate (5) match the size and position of the receiving groove (603).

4. The zero-leakage knife gate valve according to claim 3, characterized in that, The size and position of the sealing plate (608) match the size and position of the groove, and both the sealing ring (602) and the sealing plate (608) are made of silicone rubber.

5. The zero-leakage knife gate valve according to claim 4, characterized in that, The lead screw (703) is rotatably connected to the valve body (2), and the cross-section of the clamp (704) is arc-shaped.

6. The zero-leakage knife gate valve according to claim 5, characterized in that, The worm (701) is provided with a handle (707) at one end, and the outer circumference of the handle (707) is provided with multiple raised stripes.

7. The zero-leakage knife gate valve according to claim 6, characterized in that, The mounting ring (601) has a first connecting block (610) at both ends of its outer circumference, and the bracket (1) has a second connecting block (8) at the bottom of both side walls. The top of the second connecting block (8) is threaded with a bolt (9).

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