Two-section slow closing type check valve for molten salt

Abstract

The utility model discloses a two-section slow closing type check valve for molten salt. The two-section slow closing type check valve comprises a valve body and a valve deck matched with the valve body. A valve clack is arranged in the valve body; swing devices connected with the valve clack are arranged on the two sides of the outer portion of the valve body respectively, and the swing devices control opening and closing of the valve clack in the valve body. A stuffing box is arranged below the valve cover; the stuffing box is connected with the valve cover through a fastener, and a four-piece ring is arranged between the stuffing box and the valve cover; a limiting block for limiting the moving position of the valve clack is arranged below the stuffing box; the valve body adopts a Y-shaped valve body streamline runner structure, so that the flow resistance coefficient of the valve is greatly reduced, molten salt cannot be accumulated in the valve, and the problem of blockage caused by cooling crystallization of the molten salt is fundamentally avoided; through the design of the swing devices on the two sides of the valve body, the closing speed of the valve clack is slowed down through the two heavy hammers, so that the sealing face abrasion and valve vibration during valve operation are reduced; the requirements of customers are met, and the market competitiveness of enterprises is improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to valves, and in particular to a two-stage slow-closing check valve for molten salt. Background Art

[0002] A check valve is a valve whose opening and closing parts are circular discs and which blocks the backflow of the medium by its own weight and medium pressure. It is an automatic valve and is also called a non-return valve, one-way valve, reflux valve or isolation valve. When the temperature of the molten salt medium is lower than 280°C, crystallization will occur. However, due to the difference in structure, the valve body of an ordinary check valve is prone to accumulation at the bottom of the valve body, resulting in unclean discharge of the molten salt medium and residue. The cooling and crystallization of the molten salt leads to blockage, which damages the valve and affects its use.

[0003] To this end, the company developed and designed a two-stage slow-closing check valve for molten salt. Utility Model Content

[0004] The utility model aims to provide a two-stage slow-closing check valve for molten salt to solve the problems in the prior art.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a two-stage slow-closing check valve for molten salt, comprising a valve body and a valve cover matched with the valve body;

[0006] A valve disc is provided inside the valve body;

[0007] The two sides of the valve body are respectively provided with swing devices connected to the valve disc, and the swing devices control the opening and closing of the valve disc inside the valve body;

[0008] A stuffing box is provided under the valve cover;

[0009] The stuffing box and the valve cover are connected by fasteners, and four open rings are arranged between the two;

[0010] A limiting block for limiting the movable position of the valve disc is arranged below the stuffing box.

[0011] Preferably, the valve body adopts a Y-type valve body streamlined flow channel structure.

[0012] Preferably, the valve flap adopts an eccentric design structure, one end of which is provided with a connecting ring that cooperates with the swing device, and the other end of which is provided with a top block that cooperates with the limit block.

[0013] Preferably, the swing device comprises a connecting rod, a rotating sleeve, a hammer handle and a heavy hammer; one end of the connecting rod extends into the valve body and is connected to the valve disc, and the other end extends out of the rotating sleeve and is connected to it; one end of the hammer handle is connected to the connecting rod extending out of the rotating sleeve, and the other end is fixed to the heavy hammer.

[0014] Preferably, a limiting strip for limiting each other is provided at the joint between the hammer handle and the connecting rod.

[0015] Preferably, the valve cover is further provided with a lifting eye bolt.

[0016] Preferably, a self-sealing ring is provided between the stuffing box and the inner wall of the valve body.

[0017] Preferably, a sealing pressure ring is also provided on the self-sealing ring.

[0018] Due to the application of the above technical solution, the beneficial effects of the present application compared with the prior art are:

[0019] The present application discloses a two-stage slow-closing check valve for molten salt. The valve body adopts a Y-type valve body streamlined flow channel structure, which greatly reduces the valve flow resistance coefficient. The valve adopts upper pressure of the medium, and molten salt will not accumulate inside the valve, fundamentally avoiding the blockage problem caused by cooling and crystallization of molten salt. Through the design of the swing device on both sides of the valve body, two-stage heavy hammers are used to slow down the speed of valve disc closing, so as to reduce the wear of the sealing surface and valve vibration during valve operation. Such a design can better meet the requirements for valves, meet the needs of customers, and enhance the market competitiveness of enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Attached Figure 1 It is a schematic cross-sectional view of the closed state structure of the two-stage slow-closing check valve for molten salt of the utility model;

[0022] Attached Figure 2 It is a schematic cross-sectional view of the structure of the two-stage slow-closing check valve for molten salt of the utility model in the open state;

[0023] Attached Figure 3 It is a schematic diagram of the overall structure of a two-stage slow-closing check valve for molten salt of the utility model;

[0024] Attached Figure 4 It is a side schematic diagram of a two-stage slow-closing check valve for molten salt of the utility model;

[0025] Among them: 1. Valve body; 2. Valve cover; 3. Valve disc; 4. Swinging device; 5. Stuffing box; 6. Fasteners; 7. Four open rings; 8. Limit blocks; 9. Connecting rings; 10. Top block; 11. Connecting rod; 12. Rotating sleeve; 13. Hammer handle; 14. Heavy hammer; 15. Limit strip; 16. Eye bolt; 17. Self-sealing ring; 18. Sealing pressure ring. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] In this application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the utility model and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0029] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0030] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] Embodiment 1

[0033] Attached Figure 1-4 The utility model discloses a two-stage slow-closing check valve for molten salt, comprising a valve body 1 and a valve cover 2 matched with the valve body 1; the valve body 1 adopts a Y-shaped valve body 1 streamlined flow channel structure, which greatly reduces the valve flow resistance coefficient, and the valve adopts the upper pressure of the medium, and the molten salt will not accumulate inside the valve, fundamentally avoiding the blockage problem caused by the cooling and crystallization of the molten salt;

[0034] A valve flap 3 is provided inside the valve body 1; the valve flap 3 adopts an eccentric design structure, one end of which is provided with a connecting ring 9 that cooperates with the swing device 4, the connecting ring 9 is used to be connected and fixed with the connecting rod 11, and the other end is provided with a top block 10 that cooperates with the limit block 8; the valve flap 3 adopts an eccentric design, and when opened, the sealing surface of the valve flap 3 is completely separated from the sealing surface of the inner wall of the valve body 1, ensuring that the valve flap 3 and the valve body 1 are free of wear and tear, thereby extending the service life; the top block 10 cooperates with the limit block 8 to ensure that the valve flap 3 is opened to the maximum, and at the same time, the valve flap 3 is limited to protect it to prevent the valve flap 3 from rotating too much and causing damage;

[0035] The two sides of the outside of the valve body 1 are respectively provided with swing devices 4 connected to the valve disc 3, and the swing devices 4 control the opening and closing of the valve disc 3 inside the valve body 1; the swing device 4 includes a connecting rod 11, a rotating sleeve 12, a hammer handle 13 and a heavy hammer 14; one end of the connecting rod 11 extends into the valve body 1 and is connected to the valve disc 3, and the other end extends out of the rotating sleeve 12 and is connected thereto; one end of the hammer handle 13 is connected to the connecting rod 11 extending out of the rotating sleeve 12, and the other end is fixed to the heavy hammer 14; the two-stage heavy hammer 14 is used to slow down the speed of the valve disc 3 when closing, so as to reduce the wear of the sealing surface and the vibration of the valve during valve operation;

[0036] In order to prevent the valve flap 3 from being damaged due to excessive swinging amplitude during the overall operation of the swing device 4, a limit strip 15 for limiting each other is provided at the joint between the hammer handle 13 and the connecting rod 11 to ensure that the swing amplitude of the heavy hammer 14 is within a certain range and does not swing too much, causing the valve flap 3 to rotate too far inside the valve body 1 and collide with the inner wall of the valve body 1;

[0037] A stuffing box 5 is provided below the valve cover 2; the stuffing box 5 is connected to the valve cover 2 by a fastener 6, and a four-open ring 7 is provided between the two to provide further support for the stuffing box 5; a self-sealing ring 17 is also provided between the stuffing box 5 and the inner wall of the valve body 1; a sealing pressure ring 18 is also provided on the self-sealing ring 17; the self-sealing ring 17 and the sealing pressure ring 18 further improve the sealing between the valve cover 2 and the valve body 1, ensure that the valve as a whole will not leak, and improve the performance and life of the valve;

[0038] A limiting block 8 for limiting the movable position of the valve flap 3 is provided below the stuffing box 5 , and cooperates with the valve flap 3 to limit the position, thereby protecting the valve flap 3 .

[0039] In order to facilitate the removal of the valve cover 2 , a lifting eye bolt 16 is further provided on the valve cover 2 .

[0040] In actual use, after the valve is started, the valve disc 3 is parallel to the flow channel in the valve body 1, with small flow resistance and large flow capacity.

[0041] The working principle of the swing device 4 is as follows:

[0042] The initial position is the 100% opening position, at which time the swing devices 4 on both sides of the valve body 1 are in a naturally drooping and unstressed state; when the opening is 100% to 20%, the weight 14 of one swing device 4 rotates with the axis to provide a reverse torque, slowing down the speed of the first stroke, and the weight 14 of the other swing device 4 is not subject to force; when the opening is 20% to 0%, the weights 14 of the swing devices 4 on both sides are stressed at the same time, and provide a reverse torque at the same time, and further slow down the speed of the second stroke.

[0043] This application adopts such a design to better meet the requirements for valves, meet customer needs, and enhance the company's market competitiveness.

[0044] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A two-stage slow-closing check valve for molten salt, characterized in that: It includes a valve body and a valve cover matched with the valve body; A valve disc is provided inside the valve body; The two sides of the valve body are respectively provided with swing devices connected to the valve disc, and the swing devices control the opening and closing of the valve disc inside the valve body; A stuffing box is provided under the valve cover; The stuffing box and the valve cover are connected by fasteners, and four open rings are arranged between the two; A limiting block for limiting the movable position of the valve disc is arranged below the stuffing box.

2. A two-stage slow-closing check valve for molten salt as claimed in claim 1, characterized in that: The valve body adopts a Y-shaped valve body streamlined flow channel structure.

3. A two-stage slow-closing check valve for molten salt according to claim 1, characterized in that: The valve flap adopts an eccentric design structure, one end of which is provided with a connecting ring that cooperates with the swing device, and the other end of which is provided with a top block that cooperates with the limit block.

4. A two-stage slow-closing check valve for molten salt as claimed in claim 1, characterized in that: The swing device includes a connecting rod, a rotating sleeve, a hammer handle and a heavy hammer; one end of the connecting rod extends into the valve body and is connected to the valve disc, and the other end extends out of the rotating sleeve and is connected to it; one end of the hammer handle is connected to the connecting rod extending out of the rotating sleeve, and the other end is fixed to the heavy hammer.

5. A two-stage slow-closing check valve for molten salt as claimed in claim 4, characterized in that: A limiting strip for limiting each other is arranged at the joint between the hammer handle and the connecting rod.

6. A two-stage slow-closing check valve for molten salt according to claim 1, characterized in that: The valve cover is also provided with a lifting eye bolt.

7. A two-stage slow-closing check valve for molten salt according to claim 1, characterized in that: A self-sealing ring is also provided between the stuffing box and the inner wall of the valve body.

8. A two-stage slow-closing check valve for molten salt as claimed in claim 7, characterized in that: The self-sealing ring is also provided with a sealing pressure ring.

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