Double-seal marine gate valve

Abstract

The utility model discloses a dual-seal marine gate valve, which relates to the technical field of marine gate valves and comprises a hand wheel, a valve rod is mounted on the surface of the hand wheel, a nut lantern ring is mounted on the surface of the valve rod, a seal cartridge is mounted at one end of the valve rod, and a valve body is fixedly connected to one end of the seal cartridge. When the valve plate body is opened and closed, the two side faces of the outer ring of the valve plate body and the valve body are extruded and sealed, the outer ring is divided into the front outer ring piece and the rear outer ring piece by the T-shaped groove, a certain interval is formed between the front outer ring piece and the rear outer ring piece, elasticity is generated during extrusion, and friction between the valve plate body and the valve body is reduced; the abrasion and extrusion stress of a sealing surface between the valve plate body and the valve body are correspondingly reduced, the friction is reduced, the friction force between the valve plate body and the valve body is also reduced, the operation torque when the marine gate valve is opened and closed is also reduced, and the marine gate valve is not prone to leakage and long in service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of marine gate valve, concretely relates to a double sealing marine gate valve. BACKGROUND

[0002] A kind of double sealing marine gate valve is a specially designed valve, to provide higher sealing performance and longer service life. This gate valve usually includes valve body, main pipeline, secondary pipeline, first control valve and second control valve are provided on the body. The inflow port is provided at one end of the main pipeline, and the first control valve is installed on one side of the inflow port. The side of the main pipeline is connected with a plurality of shunt pipelines, and the other end of the main pipeline is installed with the second control valve on the inner side. This design makes the side of the second control valve align with the plurality of shunt pipelines, which can open the first control valve after opening the second control valve to the set pressure, so as to stabilize the outflow pressure of the liquid, reduce the risk of pressure out of control, and improve safety.

[0003] The present disclosure number CN111442103A discloses a kind of high sealing wear-resistant marine gate valve, including gate valve body, first valve plate, second valve plate, first valve plate control rod, second valve plate control rod, control mechanism, gate valve upper sealing cover, the gate valve body is equipped with two valve plate sliding groove that can cooperate with first valve plate, second valve plate, first valve plate, second valve plate are respectively equipped in two valve plate sliding groove, first valve plate upper end is equipped with first valve plate control rod, first valve plate control rod is rotatably connected with first valve plate upper end, second valve plate upper end is equipped with second valve plate control rod, second valve plate control rod is rotatably connected with second valve plate, the present application is equipped with two valve plates by setting gate valve, the synchronous operation of two valve plates can be realized by control mechanism, can improve the sealing performance of gate valve, improve the pressure resistance of gate valve, improve the reliability of gate valve, safety.

[0004] To solve the problem of marine gate valve, the prior art is to realize the synchronous operation of two valve plates by control mechanism, which can improve the sealing performance of gate valve, but the friction between valve plate and valve core body is too large, which leads to the condition that the operation torque of marine gate valve is too large when opening and closing, and further leads to the problems of easy leakage and short service life of marine gate valve. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of double sealing marine gate valve to solve the problems raised in the above background.

[0006] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0007] A double seal marine gate valve, comprising a hand wheel, the surface of the hand wheel is mounted with a valve rod, the surface of the valve rod is mounted with a nut sleeve, one end of the valve rod is mounted with a sealing sleeve, and one end of the sealing sleeve is fixedly connected with a valve body.

[0008] The further improvement of the technical scheme of the utility model lies in that: the inside of the valve body is mounted with a valve core, the contact surface of the valve body and the valve core is provided with a sealing surface, the sealing surface is arranged between the valve core and the valve body, and the marine gate valve is reinforced and sealed.

[0009] The further improvement of the technical scheme of the utility model lies in that: the sealing surface is a sealing surface made of tetrafluoroethylene material, which makes the sealing effect of the sealing sleeve better.

[0010] The further improvement of the technical scheme of the utility model lies in that: the sealing surface has two to four sealing surfaces, and multiple sealing sleeves increase the sealing performance of the whole marine gate valve.

[0011] The further improvement of the technical scheme of the utility model lies in that: the valve core comprises a circular valve plate body, the valve plate body is mounted in the inside of the valve body, the edge of the valve plate body is provided with an elastic structure, the elastic structure is arranged on the outer circle of the valve plate body, the elastic structure comprises an outer ring connected with the valve plate body, the vertical cross section of the outer ring is in the shape of a wedge with the upper part being wide and the lower part being narrow, when the valve plate body is opened and closed, the two side surfaces of the outer ring of the valve plate body are extruded and sealed with the valve body, the outer ring is divided into a front outer ring piece and a rear outer ring piece by a T-shaped groove, and there is a certain interval between the front outer ring piece and the rear outer ring piece.

[0012] The further improvement of the technical scheme of the utility model lies in that: the vertical cross section of the outer ring is in the shape of a wedge, a T-shaped groove is arranged on the edge surface of the outer ring and surrounds the outer ring in the circumferential direction, the outer ring is divided into a front outer ring piece and a rear outer ring piece by the T-shaped groove, the thickness of the front outer ring piece and the rear outer ring piece is close to the thickness of the valve plate body, when the valve plate body is opened and closed, the two side surfaces of the outer ring of the valve plate body are extruded and sealed with the valve body, the outer ring is divided into a front outer ring piece and a rear outer ring piece by the T-shaped groove, and there is a certain interval between the front outer ring piece and the rear outer ring piece, the elastic structure generates elasticity when extruded, the friction between the valve plate body and the valve body is reduced, and the abrasion and extrusion stress of the sealing surface between the valve plate body and the valve body are also reduced.

[0013] The further improvement of the technical scheme of the utility model lies in that: the left and right sides of the valve plate body are respectively provided with limiting blocks, the limiting blocks comprise front limiting blocks and rear limiting blocks, the front limiting blocks are connected on the front outer ring piece, the rear limiting blocks are connected on the rear outer ring, the friction between the valve plate body and the valve body is also reduced, and the operation torque of the marine gate valve when being opened and closed is also reduced.

[0014] Due to the adoption of the above technical scheme, the utility model has the following technical progress compared with the prior art:

[0015] 1. The utility model provides a double seal marine gate valve, the two side surfaces of valve plate body outer ring are extruded and sealed with the valve body when opening and closing, because the outer ring is divided into front outer ring piece and rear outer ring piece by T type recess, there is a certain interval between the front outer ring piece and the rear outer ring piece, and elasticity is generated when extruding, which reduces the friction between the valve plate body and the valve body, and correspondingly reduces the wear and extrusion stress of the sealing surface between the valve plate body and the valve body, the friction is reduced, the friction between the valve plate body and the valve body is also reduced, and the operation torque of the marine gate valve when opening and closing is also reduced, the marine gate valve is not prone to leakage, and has long service life.

[0016] 2. The utility model provides a double seal marine gate valve, has the valve body and valve core, and the connecting part of valve body and valve core is equipped with the sealing surface of soft material, the sealing surface of soft material is the sealing surface of tetrafluoroethylene material, the sealing surface has two to four, when the valve body is connected with the valve core, because there is the sealing surface of tetrafluoroethylene material in the middle, the valve body and the valve core are not locked. DRAWINGS

[0017] Figure 1 It is the whole structure schematic diagram of the utility model;

[0018] Figure 2 It is the structure schematic diagram of the valve body of the utility model;

[0019] Figure 3 It is the structure schematic diagram of the valve core of the utility model;

[0020] Figure 4 It is the structure schematic diagram of the valve plate body of the utility model;

[0021] Figure 5 It is the structure schematic diagram of the T type recess of the utility model.

[0022] In the drawing: 1, hand wheel; 2, nut collar; 3, sealing sleeve; 4, valve body; 5, sealing surface; 6, valve core; 61, valve plate body; 62, outer ring; 63, limit block; 64, T type recess; 7, valve rod. DETAILED DESCRIPTION

[0023] The utility model will be further explained in detail in connection with examples:

[0024] Example 1

[0025] As Figures 1-5The utility model provides a double seal ship gate valve, including hand wheel 1, the surface of hand wheel 1 is installed valve stem 7, the surface of valve stem 7 is installed nut sleeve ring 2, one end of valve stem 7 is installed sealing sleeve 3, one end of sealing sleeve 3 is fixedly connected with valve body 4, the inside installation of valve body 4 has valve core 6, the contact surface of valve body 4 with valve core 6 is provided with sealing surface 5, sealing surface 5 is teflon material sealing, sealing surface 5 has two to four;

[0026] Specifically, by rotating the hand wheel, the valve stem is lifted to move, thereby driving the valve core 6 to open and seal, the valve body 4 and the valve core 6 are provided with the sealing surface 5 of soft material at the connecting part, the sealing surface 5 of soft material is the teflon material sealing surface 5, and the sealing surface 5 has two to four. When the valve body 4 is connected with the valve core 6, the teflon material sealing surface 5 is provided in the middle, so that the valve body 4 and the valve core 6 cannot be locked.

[0027] Example 2

[0028] As Figures 1-5 shown, on the basis of example 1, the utility model provides a technical scheme: preferably, the valve core 6 includes a circular valve plate body 61, the valve plate body 61 is installed in the inside of the valve body 4, the edge of the valve plate body 61 is provided with an elastic structure, the elastic structure is arranged on the outer ring of the valve plate body 61, the elastic structure includes an outer ring 62 connected with the valve plate body 61, the vertical cross section of the outer ring 62 is in the shape of a wedge, the vertical cross section of the outer ring 62 is in the shape of a wedge structure, the edge surface of the outer ring 62 is provided with a circumferentially surrounding T-shaped groove 64, the outer ring 62 is divided into a front outer ring piece and a rear outer ring piece by the T-shaped groove 64, the thickness of the front outer ring piece and the rear outer ring piece is close to the thickness of the valve plate body 61, the left and right sides of the valve plate body 61 are respectively provided with limit blocks 63, the limit blocks 63 include a front limit block and a rear limit block, the front limit block is connected on the front outer ring piece, and the rear limit block is connected on the rear outer ring;

[0029] Specifically, when the valve plate body 61 is opened and closed, the two side surfaces of the outer ring of the valve plate body 61 are extruded and sealed with the valve body 4, because the outer ring 62 is divided into a front outer ring piece and a rear outer ring piece by the T-shaped groove 64, there is a certain interval between the front outer ring piece and the rear outer ring piece, and elasticity is generated during extrusion, thereby reducing the friction between the valve plate body 61 and the valve body 4, and correspondingly, the wear and extrusion stress of the sealing surface 5 between the valve plate body 61 and the valve body 4 are also reduced. The friction is reduced, the friction between the valve plate body 61 and the valve body 4 is also reduced, and the operation torque of the ship gate valve during opening and closing is also reduced.

[0030] The working principle of the ship gate valve convenient to install will be described below.

[0031] As Figures 1-5As shown, the valve body 4 and the valve core 6 are provided with sealing surfaces 5 of soft material at the connecting position, the sealing surfaces 5 of soft material are sealing surfaces 5 of tetrafluoroethylene material, and the sealing surfaces 5 have two to four. When the valve body 4 and the valve core 6 are connected in contact, the tetrafluoroethylene material sealing surfaces 5 in the middle avoid the valve body 4 and the valve core 6 from being locked together. When the valve plate body 61 is opened and closed, the two side surfaces of the outer ring of the valve plate body 61 are extruded and sealed by the valve body 4. Because the outer ring 62 is divided into a front outer ring piece and a rear outer ring piece by the T-shaped groove 64, there is a certain interval between the front outer ring piece and the rear outer ring piece, and elasticity is generated during extrusion, thereby reducing the friction between the valve plate body 61 and the valve body 4, reducing the wear and extrusion stress of the sealing surfaces 5 between the valve plate body 61 and the valve body 4, reducing the friction, reducing the friction between the valve plate body 61 and the valve body 4, and reducing the operation torque of the marine gate valve when it is opened and closed.

[0032] The utility model has been described in detail above, but some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, the modifications or improvements without departing from the spirit of the utility model are within the protection scope of the utility model.

Claims

1. A double-sealed marine gate valve comprising a hand wheel (1), characterized in that: The hand wheel (1) is provided with a valve rod (7) on the surface, the valve rod (7) is provided with a nut sleeve (2) on the surface, one end of the valve rod (7) is provided with a sealing sleeve (3), and one end of the sealing sleeve (3) is fixedly connected with a valve body (4).

2. A double-seal marine gate valve according to claim 1, characterized in that: The valve body (4) is provided with a valve core (6) in the inside, and the contact surface of the valve body (4) and the valve core (6) is provided with a sealing surface (5).

3. A double-seal marine gate valve according to claim 2, characterized in that: The sealing surface (5) is made of tetrafluoroethylene material.

4. A double-seal marine gate valve according to claim 2, characterized in that: The sealing surface (5) has two to four.

5. A double-seal marine gate valve according to claim 2, characterized in that: The valve core (6) comprises a circular valve plate body (61), the valve plate body (61) is installed in the inside of the valve body (4), the edge of the valve plate body (61) is provided with an elastic structure, the elastic structure is arranged on the outer circle of the valve plate body (61), the elastic structure comprises an outer ring (62) connected with the valve plate body (61), and the vertical cross section of the outer ring (62) is in the shape of a wedge with the upper part being wide and the lower part being narrow.

6. A double-seal marine gate valve according to claim 5, characterized in that: The vertical cross section of the outer ring (62) is in the shape of a wedge, a T-shaped groove (64) is arranged on the edge surface of the outer ring (62) and surrounds the outer ring (64) in the circumferential direction, the outer ring (62) is divided into a front outer ring piece and a rear outer ring piece by the T-shaped groove (64), and the thickness of the front outer ring piece and the rear outer ring piece is close to the thickness of the valve plate body (61).

7. A double-seal marine gate valve according to claim 5, characterized in that: The left and right sides of the valve plate body (61) are respectively provided with limiting blocks (63), the limiting blocks (63) comprise front limiting blocks and rear limiting blocks, the front limiting blocks are connected on the front outer ring piece, and the rear limiting blocks are connected on the rear outer ring.

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