Needle valve suitable for corrosive medium

Abstract

The utility model provides a needle valve suitable for a corrosive medium, belongs to the technical field of needle valves, mainly aims at solving the problems that the sealing performance is easy to decrease and a valve body is easy to corrode after the traditional needle valve is in contact with the corrosive medium for a long time, and adopts the technical scheme that the needle valve comprises a valve body, a liquid inlet is formed in one side of the valve body, and a liquid outlet is formed in the other side of the valve body; a liquid inlet is formed in one side of the valve body, a liquid outlet is formed in the other side of the valve body, the liquid outlet and the liquid inlet are communicated through a circulation cavity, a first anti-corrosion layer and a second anti-corrosion layer are arranged between the circulation cavity and the liquid outlet and between the circulation cavity and the liquid inlet respectively, a circulation control assembly is arranged on the top of the valve body, and a protection assembly is further arranged on the outer surface of the valve body; and through the arrangement of the first anti-corrosion layer and the second anti-corrosion layer, the problems that after a traditional needle valve makes contact with a corrosive medium for a long time, the sealing performance is prone to being reduced, and a valve body is prone to being corroded are solved, and the conveying reliability is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of needle valves, and more specifically, particularly relates to a needle valve suitable for corrosive media. Background Art

[0002] Valves play a very important role in various pipeline systems, and needle valves, as a common type, are widely used in pipeline systems in chemical, petroleum and other industries due to their unique structure and performance to achieve effective control of the opening and closing of fluids.

[0003] For example, the Chinese utility model patent with patent number 201920795760.4 provides a needle valve, which is provided with a spherical valve core, a valve body, a valve core controller and a flow channel. When in use, the spherical valve core is installed in the valve body, and then the spherical valve core is operated by the valve core controller to control the on and off of the flow channel; in the petrochemical industry, the transportation of some corrosive liquids requires valves to ensure the safety of the production process. However, after long-term contact with these corrosive media, traditional needle valves are prone to reduced sealing performance and valve body corrosion, which in turn affects the reliability of transportation. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a needle valve suitable for corrosive media to solve the technical problem in the prior art that traditional needle valves are prone to reduced sealing performance and valve body corrosion after long-term contact with these corrosive media, thereby affecting the transportation reliability.

[0005] The purpose and effect of the needle valve of the utility model applicable to corrosive media are achieved by the following specific technical means:

[0006] A needle valve suitable for corrosive media includes a valve body, a liquid inlet is arranged on one side of the valve body, and a liquid outlet is arranged on the other side. The liquid outlet and the liquid inlet are connected through a circulation cavity. A first anti-corrosion layer and a second anti-corrosion layer are respectively arranged between the circulation cavity and the liquid outlet and the liquid inlet. A circulation control component is arranged on the top of the valve body, and a protective component is also arranged on the outer surface of the valve body.

[0007] In a preferred embodiment, the protection assembly includes a first protection shell and a second protection shell, and the first protection shell and the second protection shell are respectively disposed on both sides of the valve body.

[0008] In a preferred embodiment, two groups of slots are arranged on the top of the first protective shell, and two groups of plugs are correspondingly arranged on the top of the second protective shell. The two groups of plugs are respectively detachably inserted into the two groups of slots.

[0009] In a preferred embodiment, a connecting seat is provided at the bottom of the first protective shell, a rotatable buckle is connected to the connecting seat via an axle pin, and a clamping seat is correspondingly provided at the bottom of the second protective shell, and the buckle is detachably buckled on the clamping seat.

[0010] In a preferred embodiment, the flow control assembly includes a mounting seat, the top of the valve body is fixedly connected to the mounting seat by a plurality of sets of screws, and a first sealing ring is provided between the mounting seat and the valve body.

[0011] In a preferred embodiment, the flow control component also includes a valve head, which is inserted into the flow cavity. A connecting valve stem is arranged on the top of the valve head, and an external thread is arranged on the outer surface of the connecting valve stem. A threaded hole is correspondingly opened at the bottom of the mounting seat, and the external thread cooperates with the threaded hole.

[0012] In a preferred embodiment, two groups of annular grooves are formed at the top of the valve head, second sealing rings are clamped in the two groups of annular grooves, and a rotating wheel is arranged at the top of the connecting valve stem.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. Through the setting of the first anti-corrosion layer and the second anti-corrosion layer, when using the needle valve, the valve body itself is made of stainless steel anti-corrosion material, and the first anti-corrosion layer and the second anti-corrosion layer are respectively set between the flow cavity and the liquid inlet and the liquid outlet. Moreover, the first anti-corrosion layer and the second anti-corrosion layer are both coated with titanium-based alloy, which has excellent anti-corrosion performance and barrier effect, and solves the problem that the traditional needle valve is prone to reduced sealing performance and valve body corrosion after long-term contact with corrosive media, thereby ensuring the reliability of transportation.

[0015] 2. Through the setting of the protective component, when the needle valve is used, the detachable first protective shell and the second protective shell are plug-in and clamp-fixed, so that the valve body can be protected during use, and the shell parts can be quickly removed and replaced as needed, thereby improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the needle valve suitable for corrosive media of the utility model;

[0017] Figure 2 It is an exploded view of the needle valve suitable for corrosive media of the utility model;

[0018] Figure 3 It is a top view of the needle valve suitable for corrosive media of the utility model;

[0019] Figure 4 yes Figure 3 Sectional view of AA in the middle;

[0020] Figure 5 The utility model is a schematic diagram of the structure of the protective component in the needle valve suitable for corrosive media after being disassembled.

[0021] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0022] 11. Valve body; 12. Liquid inlet; 13. Liquid outlet; 14. Circulation cavity; 15. First anti-corrosion layer; 16. Second anti-corrosion layer; 21. First protective shell; 22. Second protective shell; 23. Socket; 24. Plug; 25. Connecting seat; 26. Buckle; 27. Card seat; 31. Mounting seat; 32. First sealing ring; 33. Valve head; 34. Connecting valve stem; 35. Threaded hole; 36. Second sealing ring; 37. Rotor. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0024] Example:

[0025] As attached Figure 1 To Attachment Figure 5 As shown:

[0026] The utility model provides a needle valve suitable for corrosive media, comprising a valve body 11, the valve body 11 is made of stainless steel high-strength anti-corrosion material, one side is provided with a liquid inlet 12, the other side is provided with a liquid outlet 13, the liquid inlet 12 and the liquid outlet 13 are connected through a circulation cavity 14 to achieve the inflow and outflow of fluid; a first anti-corrosion layer 15 and a second anti-corrosion layer 16 are provided between the circulation cavity 14 and the liquid outlet 13 and the liquid inlet 12, the first anti-corrosion layer 15 and the second anti-corrosion layer 16 are both made of titanium-based alloy coating, have excellent anti-corrosion performance and barrier effect, and can effectively prevent the valve body 11 itself from being corroded due to direct contact in an environment of long-term contact with corrosive media. The corrosion problem caused by fluid, at the same time, the first anti-corrosion layer 15 and the second anti-corrosion layer 16 can also block the influence of corrosive fluid on the sealing component, thereby solving the problem that the sealing performance of the traditional needle valve is prone to decline during long-term use; a flow control component is arranged on the top of the valve body 11 to control the flow of fluid in the flow cavity 14, and at the same time, a protective component is also arranged on the outer surface of the valve body 11 to protect the valve body 11 from external influences; the use of multi-layer anti-corrosion treatment and flow control components can effectively improve the service life of the valve body 11 in a long-term contact with corrosive fluid environment, prevent the degradation of structural performance due to corrosion, and is suitable for control applications of different corrosive media.

[0027] Please refer to Figure 2 and Figure 5 As shown, the protection component includes a first protection shell 21 and a second protection shell 22, which together constitute the protection component of the needle valve; through the arrangement of the first protection shell 21 and the second protection shell 22, the surface of the valve body 11 can be effectively protected, and the overall protection capability of the needle valve can be further enhanced; by arranging an anti-corrosion layer inside the cavity and arranging a protection shell on the surface of the valve body 11, a multi-layer protection structure can be formed, which can effectively block the physical influence of the outside world on the valve body 11 and the sealing component, thereby ensuring the long-term reliable operation of the needle valve even in a more severe working environment.

[0028] Please refer to Figure 5 As shown, the protective assembly adopts a detachable structure to connect the first protective shell 21 and the second protective shell 22, so as to protect the valve body 11 and facilitate maintenance and replacement of the shell parts. Specifically, two groups of slots 23 are arranged on the top of the first protective shell 21, and correspondingly, two groups of plugs 24 are arranged on the top of the second protective shell 22, and the two groups of plugs 24 can be respectively engaged with the two groups of slots 23 of the first protective shell 21. At the same time, a connecting seat 25 is provided at the bottom of the first protective shell 21, and the connecting seat 25 is connected to a rotatable buckle 26 through an axle pin on the connecting seat 25. Matching this, a clamping seat 27 is also provided at the bottom of the second protective shell 22, and the clamping seat 26 is detachably buckled on the clamping seat 27 to realize bottom connection; so that the first protective shell 21 and the second protective shell 22 can firmly cover and protect the valve body 11 when in use, and can also be quickly disassembled and assembled once maintenance or replacement of the shell parts is required, thereby improving the use efficiency and maintenance efficiency of the entire needle valve.

[0029] Please refer to Figure 2 , Figure 3 and Figure 4 As shown, the flow control component uses a mounting seat 31 to connect and fix multiple components together to achieve fluid flow control; specifically, the top of the valve body 11 is fixedly connected to the mounting seat 31 by multiple sets of screws, so that the mounting seat 31 can be firmly installed on the valve body 11. In order to prevent fluid leakage, a first sealing ring 32 is specially provided between the mounting seat 31 and the valve body 11. The first sealing ring 32 forms a gap at the connection between the valve body 11 and the mounting seat 31 through sealing. The connection and fixation of multiple components such as the valve body 11 and the mounting seat 31 are achieved through the mounting seat 31, and the first sealing ring 32 is used to seal the fluid. This ensures that the flow control component can prevent fluid leakage at the connection between the components while controlling the flow of the fluid, and plays a dual role of flow guidance and sealing.

[0030] Please refer to Figure 2 and Figure 4As shown, the flow control component also includes a valve head 33, which is connected to the inside of the valve body 11 through the flow cavity 14 inside it to achieve flow guidance of the fluid; a structure for connecting a valve stem 34 is provided on the top of the valve head 33. In order to achieve the installation of the connecting valve stem 34, the outer surface of the connecting valve stem 34 is specially provided with an external thread structure, and correspondingly, a threaded hole 35 that matches the external thread of the connecting valve stem 34 is provided at the bottom of the mounting seat 31. In this way, the valve head 33 can be moved up and down in the flow cavity 14 by simply utilizing the cooperation of the threaded hole 35 and the external thread, so that the liquid inlet 12 is connected to the liquid outlet 13, and the connecting valve stem 34 is installed on the top of the valve head 33 through a threaded connection, thereby ensuring the flow control of the fluid in the valve body 11.

[0031] Please refer to Figure 2 and Figure 3 As shown, in order to further improve the sealing effect of the flow control component, two groups of annular grooves are opened at the top of the valve head 33, and the second sealing ring 36 is clamped in the two groups of annular grooves. The second sealing ring 36 is located in the two groups of grooves at the top of the valve head 33. At the same time, a triple sealing structure is formed between the second sealing ring 36, the valve head 33 and the connecting valve stem 34, which effectively prevents the leakage of the fluid in these key connection parts; and in order to realize the rotation control of the connecting valve stem 34, a rotating wheel 37 is specially arranged on the top of the connecting valve stem 34. By controlling and rotating the rotating wheel 37, the entire connecting valve stem 34 can be driven to achieve flow regulation and control.

[0032] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A needle valve suitable for corrosive media, characterized in that: The invention comprises a valve body (11), wherein one side of the valve body (11) is provided with a liquid inlet (12), and the other side is provided with a liquid outlet (13), the liquid outlet (13) and the liquid inlet (12) are connected via a circulation cavity (14), a first anti-corrosion layer (15) and a second anti-corrosion layer (16) are respectively provided between the circulation cavity (14) and the liquid outlet (13) and the liquid inlet (12), a circulation control component is provided on the top of the valve body (11), and a protective component is also provided on the outer surface of the valve body (11).

2. The needle valve suitable for corrosive media according to claim 1, characterized in that: The protection assembly comprises a first protection shell (21) and a second protection shell (22), and the first protection shell (21) and the second protection shell (22) are respectively arranged on both sides of the valve body (11).

3. The needle valve suitable for corrosive media according to claim 2, characterized in that: Two groups of slots (23) are arranged on the top of the first protective shell (21), and two groups of plugs (24) are correspondingly arranged on the top of the second protective shell (22), and the two groups of plugs (24) are respectively detachably inserted into the two groups of slots (23).

4. The needle valve suitable for corrosive media according to claim 3, characterized in that: A connecting seat (25) is provided at the bottom of the first protective shell (21), and a rotatable buckle (26) is connected to the connecting seat (25) via an axle pin. A corresponding clamping seat (27) is provided at the bottom of the second protective shell (22), and the buckle (26) is detachably buckled on the clamping seat (27).

5. The needle valve suitable for corrosive media according to claim 1, characterized in that: The flow control assembly comprises a mounting seat (31), the top of the valve body (11) is fixedly connected to the mounting seat (31) via a plurality of sets of screws, and a first sealing ring (32) is provided between the mounting seat (31) and the valve body (11).

6. The needle valve suitable for corrosive media according to claim 5, characterized in that: The flow control component also includes a valve head (33), the valve head (33) is inserted into the flow cavity (14), a connecting valve stem (34) is arranged on the top of the valve head (33), an external thread is arranged on the outer surface of the connecting valve stem (34), and a threaded hole (35) is correspondingly opened at the bottom of the mounting seat (31), and the external thread matches the threaded hole (35).

7. The needle valve suitable for corrosive media according to claim 6, characterized in that: The top of the valve head (33) is provided with two groups of annular grooves, and second sealing rings (36) are clamped in the two groups of annular grooves. A rotating wheel (37) is arranged on the top of the connecting valve stem (34).

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