Leak-proof valve

Abstract

The utility model discloses an anti-leakage valve, and particularly relates to an anti-leakage valve which comprises a valve body, flange assemblies located on the two sides of the valve body, a pipeline located on the outer sides of the flange assemblies, a fixing ring located on the outer wall of the pipeline, a fastening assembly located on the inner side of the fixing ring and an opening and closing hand wheel located on the top of the valve body. According to the device, positioning needs to be carried out through the fixing bolts when sealing is carried out between the mounting flange and the butt flange, the positioning sleeve is pushed towards the position of the sleeve firstly, then the fixing bolts are mounted, and after the fixing bolts are mounted, the positioning sleeve is loosened, so that the positioning sleeve is fixed through the movable sleeve rod and the spring under the cooperation of the movable sleeve rod and the spring; the positioning sleeve is sleeved on the bolt head of the fixing bolt to position the position of the fixing bolt, so that the fixing bolt is not easy to loosen, and the stability and the sealing effect of the connection between the mounting flange and the butt flange can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a leak-proof valve. Background Technology

[0002] Nuclear power plant valves, also known as power plant-specific valves, are primarily used in pipelines of various systems within thermal power plants to cut off or connect pipeline media. Applicable media include non-corrosive media such as water and steam. Compared to other valve products, power plant valves are characterized by high temperature and high pressure, and a unique self-sealing design; the higher the pressure, the more reliable the seal. Due to their performance characteristics and special operating conditions, these valves possess unique features that cannot be replaced by other products.

[0003] In the current technology, when nuclear power valves are installed and used, they are usually installed and fixed to external pipeline flanges by bolts and flanges. A sealing gasket is placed between the flanges to seal the nuclear power valves and external pipelines.

[0004] Although bolts can be used to install nuclear power plant valves and external pipeline flanges, bolts lack a protective structure. Because bolts lack a protective structure, they are exposed to the outside environment for a long time, making the bolt heads prone to corrosion and rust, which affects the subsequent disassembly of the bolts. At the same time, if the bolts become loose, the sealing between the nuclear power plant valves and external pipelines will be affected. 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. Some 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 this section, the abstract and the title of this utility model. Such simplifications or omissions shall not be used to limit the scope of this utility model.

[0006] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0007] Therefore, this utility model aims to solve the problem of inconvenient bolt disassembly and the problem that loose bolts affect the sealing between nuclear power valves and external pipelines.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a leak-proof valve, including a valve body, flange assemblies located on both sides of the valve body, a pipe located outside the flange assemblies, a fixing ring located on the outer wall of the pipe, a fastening assembly located inside the fixing ring, and an opening and closing handwheel located on the top of the valve body.

[0009] In a preferred embodiment of the anti-leakage valve of this utility model, the flange assembly includes mounting flanges symmetrically and fixedly connected on both sides of the valve body, and a mating flange is rotatably connected to the outer side of the mounting flange.

[0010] In a preferred embodiment of the anti-leakage valve described in this utility model, a sealing ring is detachably connected between the mounting flange and the docking flange, and the mounting flange, the docking flange, and the sealing ring have the same diameter.

[0011] As a preferred embodiment of the anti-leakage valve of this utility model, the mounting flange, sealing ring and mating flange are all provided with six threaded holes arranged in a circumferential array on their surfaces, and a suitable fixing bolt is rotatably connected inside the threaded holes.

[0012] In a preferred embodiment of the anti-leakage valve described in this utility model, a pipe is fixedly connected to the outside of the docking flange, and the pipe is in communication with the valve body.

[0013] In a preferred embodiment of the anti-leakage valve described in this utility model, a fixing ring is fixedly connected to the outer wall of the pipeline.

[0014] In a preferred embodiment of the anti-leakage valve of this utility model, the fastening assembly includes a sleeve that can be detachably installed inside the fixing ring. The sleeve has a hollow structure inside and a spring is fixedly connected inside the sleeve. A movable sleeve rod is fixedly connected to the end of the spring near the fixing bolt. The movable sleeve rod passes through the end of the sleeve away from the fixing ring, and a positioning sleeve is fixedly connected to the end of the movable sleeve rod away from the spring.

[0015] In a preferred embodiment of the anti-leakage valve of this utility model, the extension length of the spring is less than the internal depth of the positioning sleeve, and the total length of the positioning sleeve and the movable sleeve rod moving toward the fixing bolt is greater than the length of the fixing bolt.

[0016] In a preferred embodiment of the anti-leakage valve of this utility model, the positioning sleeve and the fixing bolt are arranged opposite to each other and adapted to each other, and both the positioning sleeve and the fixing bolt are fitted with a regular hexagonal structure.

[0017] In a preferred embodiment of the anti-leakage valve described in this utility model, the opening / closing handwheel is connected to the valve body.

[0018] The beneficial effects of this utility model are as follows: In this device, the mounting flange and the mating flange can be installed together by fixing bolts. At this time, with the cooperation of the sealing ring, a seal is formed between the mounting flange and the mating flange. When positioning the fixing bolts, the fixing bolts are installed first, and the positioning sleeve is pushed towards the sleeve position. Then the fixing bolts are installed. After the fixing bolts are installed, the positioning sleeve is loosened, so that the positioning sleeve, with the cooperation of the movable sleeve rod and the spring, fits onto the bolt head of the fixing bolt, positioning the fixing bolt and making it less likely to loosen. This ensures the stability and sealing effect of the connection between the mounting flange and the mating flange. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. 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:

[0020] Figure 1 This is a schematic diagram of the overall structure of an anti-leakage valve according to the present invention;

[0021] Figure 2 This is a schematic diagram of a fastening assembly for an anti-leakage valve according to the present invention;

[0022] Figure 3 This is an enlarged schematic diagram of part A of the anti-leakage valve of this utility model. Detailed Implementation

[0023] 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.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, 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 limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0026] Furthermore, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0027] Example 1

[0028] Reference Figure 1 and Figure 2 This is the first embodiment of the present invention. This embodiment provides a leak-proof valve. By connecting the mounting flange and the fixed flange, the valve body is sealed to the mounting flange and the fixed flange, thus ensuring the valve's sealing performance.

[0029] Specifically, the valve body 100 is a spherical structure. Flange assemblies 101 are fixedly connected to both sides of the valve body 100. Pipes 102 are fixedly connected to the outer side of the flange assemblies 101. A fixing ring 103 is fixedly connected to the outer wall of the pipe 102. The distance between the fixing ring 103 and the flange assembly 101 is fixed. A fastening assembly 104 is fixedly connected to the inner side of the fixing ring 103. An opening and closing handwheel 105 is fixedly connected to the top of the valve body 100.

[0030] Furthermore, the flange assembly 101 includes mounting flanges 101a that are symmetrically and fixedly connected on both sides of the valve body 100. The mounting flanges 101a are in communication with the valve body 100, and a mating flange 101c is rotatably connected to the outside of the mounting flanges 101a.

[0031] Preferably, a sealing ring 101b is detachably connected between the mounting flange 101a and the mating flange 101c. The sealing ring 101b can increase the airtightness between the mounting flange 101a and the mating flange 101c. The mounting flange 101a, the mating flange 101c and the sealing ring 101b have the same diameter. The surfaces of the mounting flange 101a, the sealing ring 101b and the mating flange 101c are all provided with six threaded holes 101d of the same size arranged in a circumferential array. A suitable fixing bolt 101e is rotatably connected inside the threaded hole 101d. The bolt cap of the fixing bolt 101e is located on the side close to the fixing ring 103.

[0032] First, place the sealing ring 101b between the mounting flange 101a and the docking flange 101c. Align the threaded holes 101d on the mounting flange 101a, the docking flange 101c, and the sealing ring 101b. Then, the operator mates the fixing bolt 101e with the threaded hole 101d. The fixing bolt 101e is used to seal the docking flange 101c and the mounting flange 101a, thus forming a leak-proof valve.

[0033] Example 2

[0034] Reference Figures 1-3 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment has a fixing ring fixedly connected to the outer wall of the pipe. The fixing ring is connected to the mounting flange and the docking flange, so that the pipe and the valve body are fixed again, increasing the stability and safety of the valve seal.

[0035] Specifically, a pipe 102 is fixedly connected to the outside of the connecting flange 101c. The pipe 102 is connected to the valve body 100. The pipe 102 is usually made of stainless steel, which has good corrosion resistance.

[0036] Furthermore, a fixing ring 103 is fixedly connected to the outer wall of the pipe 102. The fixing ring 103 is used to fix the pipe 102 and the mounting flange 101a and the docking flange 101c for a secondary fixation.

[0037] Preferably, the handwheel 105 is connected to the valve body 100, and the valve is opened or closed by opening or closing the handwheel 105.

[0038] Since the mounting flange 101a and the docking flange 101c are connected to the threaded hole 101d of the mounting flange 101a, the docking flange 101c and the sealing ring 101b by the fixing bolt 101e, the pipeline 102 is in a connected state with the mounting flange 101a, the docking flange 101c and the valve body 100. Then, the valve is fixed by the fixing ring 103 fixed to the outer wall of the pipeline 102 and the fixing ring 103 is fixed to the fixing bolt 101e, and the valve is tightened and sealed again. When the operator rotates the opening and closing handwheel 105 to open it, the valve is in a connected state. When the operator rotates the opening and closing handwheel 105 to close it, the valve is in a closed state.

[0039] Example 3

[0040] Reference Figures 1-3 This is the third embodiment of the present invention. Unlike the previous embodiment, in this embodiment, the positioning sleeve is connected and fixed with the fixing bolt, thereby fixing the positional relationship between the fixing ring and the mounting flange and the docking flange. Since the positioning sleeve and the fixing bolt are connected in a hexagonal shape, it is to avoid the fixing bolt from loosening and affecting the sealing performance of the valve.

[0041] Specifically, the fastening assembly 104 includes a sleeve 104a that is detachably installed inside the fixing ring 103. The sleeve 104a has a hollow structure inside. A spring 104b is fixedly connected inside the sleeve 104a. A movable sleeve rod 104c is fixedly connected to one end of the spring 104b near the fixing bolt 101e. The movable sleeve rod 104c passes through the end of the sleeve 104a away from the fixing ring 103. A positioning sleeve 104d is fixedly connected to the end of the movable sleeve rod 104c away from the spring 104b.

[0042] Furthermore, the extension length of the spring 104b is less than the internal depth of the positioning sleeve 104d, and the total length of the positioning sleeve 104d and the movable sleeve rod 104c moving toward the fixing bolt 101e is greater than the length of the fixing bolt 101e, without affecting the removal of the fixing bolt 101e from the mounting flange 101a and the mating flange 101c.

[0043] Preferably, the positioning sleeve 104d and the fixing bolt 101e are arranged opposite to each other and adapted to each other. The positioning sleeve 104d and the fixing bolt 101e are both hexagonal structures, which can effectively prevent the positioning sleeve 104d and the fixing bolt 101e from loosening and increase the stability of their fit connection.

[0044] After the fixing bolt 101e is installed inside the mounting flange 101a and the mating flange 101c, the fixing bolt 101e cannot be properly fitted and fixed with the positioning sleeve 104d. This can be achieved by adding a washer to the fixing bolt 101e, allowing the fixing bolt 101e to rotate to a position that matches the positioning sleeve 104d. This better positions the fixing bolt 101e in the hexagonal hole on the outside of the positioning sleeve 104d, thus preventing the fixing bolt 101e from loosening and ensuring the stability and sealing effect of the connection between the mounting flange 101a and the mating flange 101c.

[0045] When positioning and installing the fixing bolt 101e, first push the positioning sleeve 104d towards the position of the sleeve 104a, and then install the fixing bolt 101e so that the fixing bolt 101e connects to the threaded hole 101d of the mounting flange 101a, the mating flange 101c, and the sealing ring 101b, thus fixing the mounting flange 101a and the mating flange 101c. After the fixing bolt 101e is installed, loosen the sleeve 104a so that the sleeve 104a, with the cooperation of the movable sleeve rod 104c and the spring 104b, puts the positioning sleeve 104d onto the bolt head of the fixing bolt 101e, positioning the fixing bolt 101e so that the fixing bolt 101e is not easy to loosen, thus ensuring the stability and sealing effect of the connection between the mounting flange 101a and the mating flange 101c.

[0046] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0047] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to the implementation of the present invention) may be omitted.

[0048] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A leak-proof valve, characterized in that: include, Valve body (100), flange assemblies (101) located on both sides of the valve body (100), pipe (102) located outside the flange assembly (101), retaining ring (103) located on the outer wall of the pipe (102), fastening assembly (104) located inside the retaining ring (103), and opening / closing handwheel (105) located on the top of the valve body (100); The fastening assembly (104) includes a sleeve (104a) that is detachably installed inside the fixing ring (103). The sleeve (104a) has a hollow interior and a spring (104b) is fixedly connected inside the sleeve (104a). A movable sleeve rod (104c) is fixedly connected to one end of the spring (104b) near the fixing bolt (101e). The movable sleeve rod (104c) passes through the end of the sleeve (104a) away from the fixing ring (103), and a positioning sleeve (104d) is fixedly connected to the end of the movable sleeve rod (104c) away from the spring (104b).

2. The leak-proof valve according to claim 1, characterized in that: The flange assembly (101) includes mounting flanges (101a) symmetrically and fixedly connected on both sides of the valve body (100), and a mating flange (101c) is rotatably connected to the outside of the mounting flanges (101a).

3. The leak-proof valve according to claim 2, characterized in that: A sealing ring (101b) is detachably connected between the mounting flange (101a) and the docking flange (101c), and the mounting flange (101a), the docking flange (101c) and the sealing ring (101b) have the same diameter.

4. The leak-proof valve according to claim 3, characterized in that: The mounting flange (101a), sealing ring (101b), and mating flange (101c) are all provided with six threaded holes (101d) arranged in a circumferential array. The threaded holes (101d) are rotatably connected with matching fixing bolts (101e).

5. The leak-proof valve according to claim 4, characterized in that: A pipe (102) is fixedly connected to the outside of the docking flange (101c), and the pipe (102) is in communication with the valve body (100).

6. The leak-proof valve according to claim 5, characterized in that: A fixing ring (103) is fixedly connected to the outer wall of the pipe (102).

7. The leak-proof valve according to claim 6, characterized in that: The extension length of the spring (104b) is less than the internal depth of the positioning sleeve (104d), and the total length of the positioning sleeve (104d) and the movable sleeve rod (104c) moving toward the fixing bolt (101e) is greater than the length of the fixing bolt (101e).

8. The leak-proof valve according to claim 7, characterized in that: The positioning sleeve (104d) and the fixing bolt (101e) are arranged opposite to each other and adapted to each other. The positioning sleeve (104d) and the fixing bolt (101e) are both hexagonal structures.

9. The leak-proof valve according to claim 1, characterized in that: The opening and closing handwheel (105) is connected to the valve body (100).

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