Connecting structure for valve seat and valve body of forged steel gate valve

Abstract

The utility model discloses a connecting structure for a valve seat and a valve body of a forged steel gate valve, and relates to the technical field of forged steel gate valves. The check valve comprises a valve body, valve seats are symmetrically inserted into the inner periphery of the valve body in a sliding mode, flexible graphite ring plates matched with the valve seats in an abutting mode are symmetrically and fixedly connected to the inner circumferential side face of the valve body, annular abutting plates are fixedly connected to the two opposite side faces of the valve seats, and a gate body is inserted into the valve body. The valve body is controlled to rotate anticlockwise, the valve body drives the abutting ring to rotate, then the annular abutting plate on the valve seat moves along the arc-shaped groove in the abutting ring, the diameter of the arc-shaped groove becomes larger and larger in the process that the arc-shaped groove makes contact with the abutting ring along with rotation of the abutting ring, and therefore the valve seat is prevented from being damaged. When the forged steel gate valve rotates, the abutting ring is driven to move in the direction away from the gate body, then the valve seat is driven to move towards the interior of the notch, meanwhile, the valve seat extrudes the flexible graphite ring plate, the valve seat is tightly attached to the valve body, and therefore the sealing performance between the valve seat and the valve body is improved, and the sealing performance of the forged steel gate valve is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of forged steel gate valves, in particular to a connection structure between a valve seat and a valve body of a forged steel gate valve. Background Art

[0002] The opening and closing element of a forged steel gate valve is the gate body. Forged steel gate valves can only be fully opened and closed; they cannot be adjusted or throttled. The gate body of a forged steel gate valve has two sealing surfaces. The most common design uses a wedge-shaped seal, with the angle varying depending on the valve's parameters. Forged steel gate valves are available in a variety of actuation methods: manual, pneumatic, electric, and gas-hydraulic. Gate valves are categorized by material: cast iron, ductile iron, stainless steel, and forged steel.

[0003] At present, when the valve seat of a forged steel gate valve is connected to the valve body, as the gate body opens, the liquid inside the valve body will leak from the gap between the valve body and the valve seat, thereby affecting the sealing performance of the forged gate valve.

[0004] To this end, we provide a forged steel gate valve seat and valve body connection structure to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a connection structure between a valve seat and a valve body of a forged steel gate valve, which controls the gate body to rotate counterclockwise so that the gate body drives the resistance ring to rotate, thereby causing the annular resistance plate on the valve seat to move along the arc groove on the resistance ring. As the resistance ring rotates, the diameter of the arc groove becomes larger and larger during the process of the arc groove contacting the resistance ring, thereby driving the resistance ring to move in the direction away from the gate body, thereby driving the valve seat to move toward the inside of the groove, and at the same time causing the valve seat to extrude the flexible graphite ring plate, so that the valve seat fits tightly against the valve body, thereby improving the sealing between the valve seat and the valve body, thereby improving the sealing of the forged steel gate valve, and solving the problem that in the process of connecting the valve seat and the valve body of the existing forged steel gate valve, as the gate body is opened, the liquid inside the valve body will leak from the gap at the connection between the valve body and the valve seat, thereby affecting the sealing of the forged gate valve.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The utility model discloses a forged steel gate valve seat and valve body connection structure, comprising a valve body; the valve seat is symmetrically and slidingly inserted into the valve body, the inner peripheral side surface of the valve body is symmetrically and fixedly connected with a flexible graphite ring plate that contacts and cooperates with the valve seat, the two opposite side surfaces of the valve seat are fixedly connected with an annular resistance plate, the interior of the valve body is provided with a gate body, the outer peripheral side surface of the gate body is symmetrically provided with an annular groove, the interior of the annular groove is fixedly connected with a resistance ring, the outer wall of the resistance ring is provided with an arc groove in a circumferential array and slidingly cooperates with the annular resistance plate; the radius of the arc groove gradually increases, and the valve body is provided with a notch that matches the valve seat.

[0008] The utility model is further configured such that a valve stem is fixedly connected to the top of the gate body, a valve cover symmetrically arranged on the top of the valve body and covering the side surface of the valve stem, and bolts are symmetrically threadedly connected between the valve cover and the valve body.

[0009] The utility model is further configured such that a pin is symmetrically inserted between the two valve covers, a plurality of sealing granular balls are filled between the valve covers and the valve stem, and a stud is symmetrically fixedly connected to the top of the valve cover.

[0010] The utility model is further configured such that a packing pressure plate covered on the peripheral side of the valve stem is slidably inserted into the inner peripheral side of the valve cover, the packing pressure plate is slidably fitted on the outer peripheral side of the stud, and a first nut is threadedly connected between the stud and the packing pressure plate.

[0011] The utility model is further configured such that a sliding bearing sleeved on the circumferential side surface of the valve stem is provided on the top of the packing pressure plate, and a second nut is threadedly connected to the outer wall of the sliding bearing.

[0012] The utility model is further configured such that the peripheral side surface of the valve stem is fixedly connected to a handwheel sleeved on the outer peripheral side surface of the sliding bearing, and the peripheral side surface of the valve stem is threadedly connected to a limiting nut adapted to the handwheel.

[0013] The utility model is further configured such that the outer wall of the hand wheel is coated with corrosion-resistant paint, and the outer wall of the hand wheel is provided with an anti-slip sleeve covering the paint surface.

[0014] The utility model has the following beneficial effects:

[0015] 1. The utility model controls the gate body to rotate counterclockwise, so that the gate body drives the resistance ring to rotate, and then the annular resistance plate on the valve seat moves along the arc groove on the resistance ring. As the resistance ring rotates, the diameter of the arc groove becomes larger and larger during the contact process between the arc groove and the resistance ring, thereby driving the resistance ring to move away from the gate body, and then driving the valve seat to move toward the inside of the groove, and at the same time making the valve seat squeeze the flexible graphite ring plate, so that the valve seat fits tightly on the valve body, thereby improving the sealing between the valve seat and the valve body, thereby improving the sealing of the forged steel gate valve.

[0016] 2. The utility model has memory through the flexible graphite ring plate. When the gate body rotates counterclockwise to open the valve body, the flexible graphite ring plate returns to its original state, thereby resetting the valve seat.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a structural schematic diagram of the connection structure between the valve seat and the valve body of a forged steel gate valve.

[0020] Figure 2 It is a structural diagram of the connection between the gate body and the resistance ring in the utility model.

[0021] Figure 3 It is a structural diagram of the gate body in this utility model.

[0022] Figure 4 It is a structural diagram of the interference ring in the present utility model.

[0023] Figure 5 It is a state structure schematic diagram of the utility model.

[0024] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0025] 1-valve body, 2-valve seat, 3-annular back plate, 4-gate body, 5-groove, 6-contact ring, 7-arc groove, 8-notch, 9-valve stem, 10-valve stem, 11-bolt, 12-pin, 13-sealing particle ball, 14-stud, 15-packing pressure plate, 16-first nut, 17-sliding bearing, 18-second nut, 19-handwheel, 20-limit nut, 21-flexible graphite ring plate. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0027] For specific embodiment 1, please refer to Figure 1-5 The utility model is a forged steel gate valve seat and valve body connection structure, comprising a valve body 1; a valve seat 2 is symmetrically and slidably inserted into the valve body 1 (the two ends of the valve seat 2 have ductility and resilience), the inner circumferential side of the valve body 1 is symmetrically and fixedly connected with a flexible graphite ring plate 21 that contacts and cooperates with the valve seat 2, and the two opposite sides of the valve seat 2 are fixedly connected with an annular backing plate 3, a gate body 4 is inserted into the interior of the valve body 1, and an annular groove 5 is symmetrically provided on the outer circumferential side of the gate body 4, and a conflicting ring 6 is fixedly connected to the inside of the annular groove 5, and the outer wall of the conflicting ring 6 is provided with an arc groove 7 in a circumferential array that slides with the annular backing plate 3; the radius of the arc groove 7 gradually increases, and a notch 8 that matches the valve seat 2 is provided on the valve body 1.

[0028] The operating process of this embodiment is: (in the initial state, the interior of the valve body 1 is in an unobstructed state) by controlling the gate body 4 to rotate counterclockwise, the gate body 4 drives the resistance ring 6 to rotate, and then the annular resistance plate 3 on the valve seat 2 moves along the arc groove 7 on the resistance ring 6. As the resistance ring 6 rotates, the arc groove 7 contacts the resistance ring 6, and the diameter of the arc groove 7 becomes larger and larger, thereby driving the resistance ring 6 to move away from the gate body 4, and then driving the valve seat 2 to move toward the inside of the notch 8, and at the same time making the valve seat 2 squeeze the flexible graphite ring plate 21, so that the valve seat 2 fits tightly on the valve body 1 (at this time, the gate body 4 blocks the inside of the valve body 1, so that the inside of the valve body 1 has no flow), thereby improving the sealing between the valve seat 2 and the valve body 1, thereby improving the sealing of the forged steel gate valve.

[0029] For specific embodiment 2, please refer to Figure 1-5On the basis of the specific embodiment 1, the top of the gate body 4 is fixedly connected with the valve stem 9, the top of the valve body 1 is symmetrically provided with a valve cover 10 covered on the side surface of the valve stem 9, the valve cover 10 and the valve body 1 are symmetrically threaded with bolts 11, and a pin shaft 12 is symmetrically inserted between the two valve covers 10. A plurality of sealing granular balls 13 are filled between the valve cover 10 and the valve stem 9, and the top of the valve cover 10 is symmetrically fixed with a stud 14. The inner peripheral side of the valve cover 10 is slidably inserted with a packing pressure plate 15 covered on the side surface of the valve stem 9, and the packing pressure plate 15 is slidably fitted on the stud 14. On the outer peripheral side surface, a first nut 16 is threadedly connected between the stud 14 and the packing pressure plate 15, and a sliding bearing 17 is provided on the top of the packing pressure plate 15, which is sleeved on the peripheral side surface of the valve stem 9. A second nut 18 is threadedly connected to the outer wall of the sliding bearing 17, and the peripheral side surface of the valve stem 9 is fixedly connected to a handwheel 19 sleeved on the outer peripheral side surface of the sliding bearing 17. The peripheral side surface of the valve stem 9 is threadedly connected to a limiting nut 20 adapted to the handwheel 19. The outer wall of the handwheel 19 is coated with corrosion-resistant paint, and the outer wall of the handwheel 19 is provided with an anti-slip sleeve covering the paint surface.

[0030] The operation process of this embodiment is: by manually controlling the handwheel 19 clockwise or counterclockwise, the handwheel 19 drives the gate body 4 to rotate clockwise or counterclockwise. The handwheel 19 drives the gate body 4 to rotate clockwise to close the valve body 1, and the handwheel 19 drives the gate body 4 to rotate counterclockwise to open the valve body 1.

[0031] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0032] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A forged steel gate valve seat and valve body connection structure, comprising a valve body (1); characterized in that: The valve body (1) is symmetrically and slidingly inserted with a valve seat (2), the inner peripheral side of the valve body (1) is symmetrically and fixedly connected with a flexible graphite ring plate (21) that contacts and cooperates with the valve seat (2), and the two opposite side surfaces of the valve seat (2) are fixedly connected with an annular support plate (3), the valve body (1) is internally inserted with a gate body (4), the outer peripheral side of the gate body (4) is symmetrically provided with an annular groove (5), the inside of the annular groove (5) is fixedly connected with a resistance ring (6), the outer wall of the resistance ring (6) is provided with an arc groove (7) in a circumferential array and slidingly cooperates with the annular support plate (3); the radius of the arc groove (7) gradually increases, and the valve body (1) is provided with a notch (8) that matches the valve seat (2).

2. A forged steel gate valve seat and valve body connection structure according to claim 1, characterized in that: The top of the gate body (4) is fixedly connected to a valve stem (9), the top of the valve body (1) is symmetrically provided with a valve cover (10) covering the side surface of the valve stem (9), and bolts (11) are symmetrically threadedly connected between the valve cover (10) and the valve body (1).

3. A forged steel gate valve seat and valve body connection structure according to claim 2, characterized in that: A pin shaft (12) is symmetrically inserted between the two valve covers (10), a plurality of sealing granular balls (13) are filled between the valve covers (10) and the valve stem (9), and a stud (14) is symmetrically fixedly connected to the top of the valve cover (10).

4. A forged steel gate valve seat and valve body connection structure according to claim 3, characterized in that: A packing pressure plate (15) is slidably inserted into the inner peripheral side of the valve cover (10) and is covered on the peripheral side of the valve stem (9). The packing pressure plate (15) is slidably fitted on the outer peripheral side of the stud (14). A first nut (16) is threadedly connected between the stud (14) and the packing pressure plate (15).

5. A forged steel gate valve seat and valve body connection structure according to claim 4, characterized in that: A sliding bearing (17) sleeved on the side surface of the valve stem (9) is provided on the top of the packing pressure plate (15), and a second nut (18) is threadedly connected to the outer wall of the sliding bearing (17).

6. A forged steel gate valve seat and valve body connection structure according to claim 5, characterized in that: The circumferential side surface of the valve stem (9) is fixedly connected to a hand wheel (19) sleeved on the outer circumferential side surface of the sliding bearing (17), and the circumferential side surface of the valve stem (9) is threadedly connected to a limiting nut (20) adapted to the hand wheel (19).

7. A forged steel gate valve seat and valve body connection structure according to claim 6, characterized in that: The outer wall of the hand wheel (19) is coated with corrosion-resistant paint, and the outer wall of the hand wheel (19) is provided with an anti-slip cover covering the paint surface.

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