Novel parallel double-gate-disc gate valve

Abstract

The utility model relates to a novel parallel double-disc gate valve which can be used in the fields of electric power, petrifaction, new energy and the like. The valve is composed of a valve body, a valve clack assembly, a valve rod, a support, a valve rod nut, a driving device and a valve seat. The valve body is welded with the valve seats, sealing surfaces of the two valve seats are parallel, and the distance is L; the valve clack assembly is composed of an auxiliary valve clack, a spring, a set screw, a gland, an anti-loose gasket and a main valve clack. The main valve clack and the auxiliary valve clack are pushed away by the spring to be tightly attached to the sealing face of the valve seat, and it is guaranteed that the valve is closed and sealed; in a free state, the distance H between the sealing faces of the main valve clack and the auxiliary valve clack is larger than L, the distance h between the adjacent end faces, namely the end face A and the end face E and the distance h between the end face D and the end face G, of the main valve clack and the auxiliary valve clack are larger than H-L, the main valve clack and the auxiliary valve clack move flexibly, and valve sealing is guaranteed. The size of the cavity in the valve body can be reduced, the overall height and weight of the valve are reduced, and the effect of effectively reducing the design and manufacturing cost of the valve is achieved.

Description

Technical Field

[0001] This invention relates to a novel parallel double-gate valve, which can be used in the fields of power, petrochemical, and new energy. Background Technology

[0002] Parallel double-gate valves used in power, petrochemical, and new energy industries are generally equipped with clamping rings, which connect the two valve discs and the spring (see...). Figure 1 The valve design and manufacturing costs are excessively high because the valve body has a large cavity size, a heavy valve body and cover, and a guide plate on the valve stem to prevent the valve stem from rotating.

[0003] This invention provides a novel parallel double-gate valve that eliminates components such as clamping rings, upper clamping plates, and guide plates, and uses main valve disc guide ribs to prevent valve stem rotation. This type of double-gate valve can reduce the size of the valve body cavity and lower the overall height and weight of the valve, effectively reducing valve design and manufacturing costs. Summary of the Invention

[0004] This invention provides a novel parallel double gate valve, which eliminates the clamping ring and upper clamping plate, thereby reducing the size and weight of the valve body cavity, eliminating components such as guide plates, and reducing the valve height, thus reducing the valve design and manufacturing costs.

[0005] The technical solution adopted in this invention is: a novel parallel double-gate valve, comprising a valve body, a valve disc assembly, a valve stem, a bracket, a valve stem nut, a drive device, and a valve seat. The valve body and valve seat are welded together, and the sealing surfaces of the two valve seats are parallel. The valve disc assembly consists of an auxiliary valve disc, a spring, a set screw, a gland, an anti-loosening gasket, and a main valve disc. The spring pushes the main valve disc and the auxiliary valve disc apart in parallel, so that the main valve disc, the auxiliary valve disc, and the valve seat sealing surfaces are tightly fitted, achieving a seal when the valve is closed.

[0006] The bracket connects the valve body, valve stem nut, and drive device together; a hook groove is provided at the upper end of the main valve disc, and the valve stem and valve disc assembly are connected through the hook groove. The drive device drives the valve stem nut, which in turn moves the valve stem and valve disc assembly up and down to realize the gate valve opening and closing action.

[0007] The main valve disc has a main sealing surface, and a positioning groove is provided on the back side of the main sealing surface. The auxiliary valve disc has an auxiliary sealing surface, and a positioning platform is provided on the back side of the auxiliary sealing surface, which mates with the positioning groove of the main valve disc. Spring grooves A and threaded holes are evenly distributed on the positioning groove side of the main valve disc, and spring grooves B are evenly distributed on the positioning platform side of the auxiliary valve disc, with spring grooves B mateing with spring grooves A. The gland has evenly distributed through holes, which mate with the threaded holes of the main valve disc.

[0008] The main valve disc and auxiliary valve disc are connected together by a set screw and a gland, ensuring that end face B of the gland is in close contact with end face A of the main valve disc, and end face C of the gland is in contact with end face F of the auxiliary valve disc, preventing the spring from springing open further. An anti-loosening washer is placed at the bottom of the set screw to prevent it from loosening. Springs are evenly distributed between the main valve disc and the auxiliary valve disc. In the free state, the springs push the main valve disc and auxiliary valve disc apart in parallel, with the main sealing surface and auxiliary sealing surface of the valve disc parallel to each other, separated by a distance H.

[0009] The distance between the two valve seat sealing surfaces inside the valve body is L, and H > L. During valve assembly, the spring between the main valve disc and the auxiliary valve disc is further compressed, so that the main valve disc, the auxiliary valve disc, and the valve seat sealing surfaces fit tightly together to achieve valve sealing.

[0010] In the free state, the distance between the end face A of the main valve disc and the end face E of the auxiliary valve disc is h, and the distance between the end face D of the main valve disc and the end face G of the auxiliary valve disc is also h, where h > HL. After the valve is installed, when the spring between the main valve disc and the auxiliary valve disc is compressed, a certain distance is still maintained between the end face A of the main valve disc and the end face E of the auxiliary valve disc, as well as between the end face D of the main valve disc and the end face G of the auxiliary valve disc, ensuring flexible movement between the main valve disc and the auxiliary valve disc and guaranteeing valve sealing.

[0011] Guide ribs are provided on both sides of the main valve disc, and two guide grooves are provided in the valve body cavity, which are designed to cooperate with the guide ribs of the main valve disc. The guide ribs move up and down in the guide grooves to prevent the valve disc assembly from rotating. At the same time, the hook groove of the main valve disc prevents the valve stem from rotating, so the valve does not need to be equipped with a guide plate.

[0012] The beneficial effect of this invention is that the parallel double-gate valve eliminates components such as the clamping ring, upper clamping plate, and guide plate, and uses guide ribs on the main valve disc to prevent valve stem rotation. The double-gate valve of this invention can reduce the size of the valve body cavity, lower the overall height and weight of the valve, and effectively reduce valve design and manufacturing costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a common parallel double gate valve;

[0014] Figure 2 This is a schematic diagram of the structure of a new type of parallel double-gate valve;

[0015] Figure 3 This is a cross-sectional view of the valve disc assembly;

[0016] Figure 4 This is a cross-sectional view of the main valve disc;

[0017] Figure 5 This is a view of the main valve disc from direction A;

[0018] Figure 6This is a cross-sectional view of the auxiliary valve disc;

[0019] Figure 7 This is a cross-sectional view of the pressure cap;

[0020] Figure 8 It is an assembly drawing of the valve body and valve seat;

[0021] Figure 9 This is a cross-sectional view of the valve seat.

[0022] In the diagram, 1. Valve body, 2. Valve disc assembly, 3. Valve stem, 4. Bracket, 5. Valve stem nut, 6. Drive unit, 7. Valve seat, 2-1. Auxiliary valve disc, 2-2. Spring, 2-3. Set screw, 2-4. Gland, 2-5. Anti-loosening gasket, 2-6. Main valve disc Detailed Implementation

[0023] exist Figure 2 , Figure 3 , Figure 4 In the illustrated embodiment, the present invention provides a novel parallel double-gate valve, comprising a valve body 1, a valve disc assembly 2, a valve stem 3, a bracket 4, a valve stem nut 5, a drive device 6, and a valve seat 7. The valve body 1 and valve seat 7 are welded together, with the sealing surfaces of the two valve seats 7 being parallel. The valve disc assembly 2 consists of an auxiliary valve disc 2-1, a spring 2-2, a set screw 2-3, a gland 2-4, an anti-loosening gasket 2-5, and a main valve disc 2-6. The spring 2-2 pushes the main valve disc 2-6 and the auxiliary valve disc 2-1 apart in parallel, ensuring a tight fit between the main valve disc 2-6, the auxiliary valve disc 2-1, and the sealing surfaces of the valve seats 7, achieving a seal when the valve is closed.

[0024] The bracket 4 connects the valve body 1, the valve stem nut 5, and the drive device 6 together; the upper end of the main valve disc 2-6 is provided with a hook groove, and the valve stem 3 and the valve disc assembly 2 are connected through the hook groove. The drive device 6 drives the valve stem nut 5 to rotate, which drives the valve stem 3 and the valve disc assembly 2 to move up and down, thereby realizing the gate valve opening and closing action.

[0025] exist Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 In the illustrated embodiment, the main valve disc 2-6 has a main sealing surface, and a positioning groove is provided on the back side of the main sealing surface; the auxiliary valve disc 2-1 has an auxiliary sealing surface, and a positioning platform is provided on the back side of the auxiliary sealing surface, which mates with the positioning groove of the main valve disc 2-6. Spring grooves A and threaded holes are evenly distributed on the positioning groove side of the main valve disc 2-6, and spring grooves B are evenly distributed on the positioning platform side of the auxiliary valve disc 2-1, with spring grooves B mateing with spring grooves A. The gland 2-4 has evenly distributed through holes, which mate with the threaded holes of the main valve disc 2-6.

[0026] The main valve disc 2-6 and the auxiliary valve disc 2-1 are connected together by set screw 2-3 and gland 2-4 to form valve disc assembly 2. The end face B of gland 2-4 is in close contact with the end face A of main valve disc 2-6, and the end face C of gland 2-4 is in contact with the end face F of auxiliary valve disc 2-1 to prevent spring 2-2 from springing open further. An anti-loosening washer 2-5 is provided at the lower part of set screw 2-3 to prevent set screw 2-3 from loosening. Springs 2-2 are evenly arranged between main valve disc 2-6 and auxiliary valve disc 2-1. In the free state, springs 2-2 push main valve disc 2-6 and auxiliary valve disc 2-1 apart in parallel, and the main sealing surface and auxiliary sealing surface of valve disc are arranged parallel to each other.

[0027] In its free state, the valve disc assembly 2 has a distance of H between the main sealing surface and the auxiliary sealing surface of the valve disc, and a distance of L between the sealing surfaces of the two valve seats 7, where H > L. During valve installation, the spring 2-2 between the main valve disc 2-6 and the auxiliary valve disc 2-1 will be further compressed, causing the main valve disc 2-6, the auxiliary valve disc 2-1, and the sealing surfaces of the valve seats 7 to fit tightly together, thus achieving valve sealing.

[0028] In the free state, the distance between end face A of the main valve disc 2-6 and end face E of the auxiliary valve disc 2-1 is h, and the distance between end face D of the main valve disc 2-6 and end face G of the auxiliary valve disc 2-1 is also h, where h > HL. After the valve is installed, when the spring 2-2 between the main valve disc 2-6 and the auxiliary valve disc 2-1 is compressed, a certain distance is still maintained between end face A of the main valve disc 2-6 and end face E of the auxiliary valve disc 2-1, and between end face D of the main valve disc 2-6 and end face G of the auxiliary valve disc 2-1, allowing the main valve disc 2-6 and the auxiliary valve disc 2-1 to move flexibly and ensuring valve sealing.

[0029] Guide ribs are provided on both sides of the main valve disc 2-6, and two guide grooves are provided in the cavity of the valve body 1, which are configured to cooperate with the guide ribs of the main valve disc 2-6. The guide ribs move up and down in the guide grooves to prevent the valve disc assembly 2 from rotating. At the same time, the hook groove of the main valve disc 2-6 prevents the valve stem 3 from rotating. The valve does not need to be equipped with a guide plate.

Claims

1. A novel parallel double-gate valve, comprising a valve body (1), a valve disc assembly (2), a valve stem (3), a bracket (4), a valve stem nut (5), a drive device (6), and a valve seat (7), characterized in that: The valve body (1) is welded to the valve seat (7), and the sealing surfaces of the two valve seats (7) are parallel. The valve stem (3) and the valve disc assembly (2) are connected through the hook groove. The driving device (6) drives the valve stem (3) and the valve disc assembly (2) to move up and down to realize the gate valve opening and closing. The valve disc assembly (2) consists of an auxiliary valve disc (2-1), a spring (2-2), a set screw (2-3), a gland (2-4), an anti-loosening gasket (2-5), and a main valve disc (2-6). The spring (2-2) pushes the main valve disc (2-6) and the auxiliary valve disc (2-1) apart in parallel, so that the main valve disc (2-6), the auxiliary valve disc (2-1) and the sealing surface of the valve seat (7) fit tightly together.

2. The novel parallel double-gate valve according to claim 1, characterized in that: The main valve disc (2-6) is provided with a main sealing surface, and a positioning groove is provided on the back side of the main sealing surface; the auxiliary valve disc (2-1) is provided with an auxiliary sealing surface, and a positioning platform is provided on the back side of the auxiliary sealing surface, which is configured to cooperate with the positioning groove of the main valve disc (2-6); the positioning groove side of the main valve disc (2-6) is uniformly provided with spring grooves A and threaded holes, the positioning platform side of the auxiliary valve disc (2-1) is uniformly provided with spring grooves B, which are configured to cooperate with spring grooves A, and the gland (2-4) is uniformly provided with through holes, which are configured to cooperate with the threaded holes of the main valve disc (2-6).

3. The novel parallel double-gate valve according to claim 1, characterized in that: In the free state, the valve disc assembly (2) has the main sealing surface of the valve disc parallel to the auxiliary sealing surface of the valve disc, with a distance of H between them, and the distance between the sealing surfaces of the two valve seats (7) is L, and H > L.

4. A novel parallel double-gate valve according to claim 1, characterized in that: In the free state, the distance between the end face A of the main valve disc (2-6) and the end face E of the auxiliary valve disc (2-1) is h, and the distance between the end face D of the main valve disc (2-6) and the end face G of the auxiliary valve disc (2-1) is also h, where h > HL.

5. A novel parallel double-gate valve according to claim 1, characterized in that: The upper end of the main valve disc (2-6) is provided with a hook groove and the two sides are provided with guide ribs; two guide grooves are provided in the cavity of the valve body (1), which are set in cooperation with the guide ribs of the main valve disc (2-6), and the guide ribs move up and down in the guide grooves.

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