Multi-layer composite protective type self-aggregation resistant hard seal ball valve

Abstract

The utility model belongs to the technical field of ball valve, and disclose a multilayer composite protection type prevents self -aggregation hard seal ball valve, including valve body, the top of valve body is installed the valve rod, the bottom of valve rod penetrates valve body and is fixedly connected with the valve core, and the outer surface of valve core is equipped with the sealing ring, sealing ring is connected with valve rod rotationally, the outer surface of sealing ring is equipped with the accommodating groove no.

Description

Technical Field

[0001] This utility model belongs to the field of ball valve technology, specifically a multi-layer composite protective anti-self-polymerization hard-seal ball valve. Background Technology

[0002] A ball valve is a type of valve in which the ball is directly driven by the valve stem and rotates around the valve axis. It can also be used for fluid regulation and control. Among them, the hard-seal V-type ball valve has a strong shearing force between the V-shaped ball core and the metal valve body with hard alloy overlay, making it particularly suitable for media containing fibers, small solid particles, etc.

[0003] Meanwhile, the patent specification with application number CN222229535U discloses an anti-self-aggregation ball valve, which "includes a three-way valve body, a three-way ball valve is movably connected inside the three-way valve body, a connecting rod is fixedly connected to the top of the three-way ball valve, an adjusting handle is fixedly connected to the top of the connecting rod, a locking mechanism is fixedly connected to one side of the three-way valve body, and three sets of flow reduction mechanisms are inserted inside the three-way valve body, and the flow reduction mechanisms are respectively located at the three sets of ports of the three-way valve body";

[0004] During use, existing hard-seal ball valves are prone to polymer deposition on the valve body and valve core surfaces, leading to sealing failure. Traditional single-scraper structures have low cleaning efficiency and are prone to wear. Secondly, the valve body material has insufficient corrosion resistance and is prone to delamination and peeling in highly corrosive media, failing to meet the requirements for long-term stable operation.

[0005] Therefore, a multi-layer composite protective anti-self-polymerization hard-seal ball valve is proposed to address the above problems. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides a multi-layer composite protective anti-self-polymerization hard-seal ball valve, which solves the problem of incomplete cleaning by traditional single scraper, improves anti-self-polymerization efficiency, ensures the pressure-bearing capacity of the valve body, avoids sealing failure caused by corrosion or wear of traditional single materials, and extends the service life of the valve.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer composite protective anti-self-polymerizing hard-seal ball valve, comprising a valve body, a valve stem installed at the top of the valve body, a valve core fixedly connected to the bottom end of the valve stem through the valve body, and a sealing ring provided on the outer surface of the valve core, the sealing ring being rotatably connected to the valve stem, a receiving groove 1 being formed on the outer surface of the sealing ring, and a receiving groove 2 being formed on the inner surface of the sealing ring, a plurality of metal springs being fixedly connected to one side of the inner wall of both the receiving groove 1 and the receiving groove 2, a scraper 1 being fixedly connected to the plurality of metal springs located on the inner wall of the receiving groove 1, and a scraper 2 being fixedly connected to the plurality of metal springs located on the inner wall of the receiving groove 2.

[0008] Preferably, the first scraper is in contact with the inner surface of the valve body, and the second scraper is in contact with the outer surface of the valve core.

[0009] Preferably, a rotating shaft is fixedly connected to the outer surface of the sealing ring, and the bottom end of the rotating shaft passes through the valve body and is fixedly connected to an operating rod.

[0010] Preferably, all of the aforementioned metal springs are arc-shaped, and all of the aforementioned metal springs are made of titanium alloy.

[0011] Preferably, the valve body is made of carbon steel, the inner layer of the valve body is provided with a hard sealing layer, and the outer layer of the valve body is provided with a structural support layer.

[0012] Preferably, the structural support layer is made of duplex stainless steel.

[0013] Preferably, the hard sealing layer is made of zirconium oxide coating material.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model solves the problem of incomplete cleaning by setting titanium alloy metal springs in the receiving groove 1 and receiving groove 2 of the sealing ring to connect scraper 1 and scraper 2. Under the elastic pre-tightening action of the metal springs, the two scrapers continuously adhere to the inner surface of the valve body and the outer surface of the valve core, and simultaneously scrape off bidirectional polymer deposits, thus solving the problem of incomplete cleaning by traditional single scraper and improving the anti-self-polymerization efficiency.

[0016] 2. This utility model designs the valve body as a three-layer composite structure consisting of a structural support layer, a carbon steel body, and a hard sealing layer. Under the high-strength load-bearing capacity of the duplex stainless steel structural support layer, combined with the wear-resistant properties of the zirconia hard sealing layer, it not only ensures the pressure-bearing capacity of the valve body, but also avoids the sealing failure caused by corrosion or wear of traditional single materials, thus extending the service life of the valve. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the valve body of this utility model;

[0019] Figure 3 This is a schematic diagram of the sealing ring structure of this utility model;

[0020] Figure 4 This is a schematic diagram showing the disassembled structure of the sealing ring, scraper one, and scraper two of this utility model;

[0021] Figure 5 This is a schematic diagram of the metal spring structure of this utility model.

[0022] In the diagram: 1. Valve body; 11. Hard sealing layer; 12. Structural support layer; 13. Valve core;

[0023] 141. Sealing ring; 142. Scraper blade 2; 143. Scraper blade 1; 144. Operating lever; 145. Rotating shaft; 146. Receiving groove 1; 147. Metal spring; 148. Receiving groove 2;

[0024] 2. Valve stem. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figures 1 to 5 As shown, this utility model provides a multi-layer composite protective anti-self-polymerization hard-seal ball valve, including a valve body 1, a valve stem 2 installed at the top of the valve body 1, a valve core 13 fixedly connected to the bottom end of the valve stem 2 through the valve body 1, and a sealing ring 14 provided on the outer surface of the valve core 13. The sealing ring 14 is rotatably connected to the valve stem 2. A receiving groove 145 is opened on the outer surface of the sealing ring 14, and a receiving groove 147 is opened on the inner surface of the sealing ring 14. Several metal springs 146 are fixedly connected to one side of the inner wall of the receiving groove 145 and the receiving groove 147. A scraper 142 is fixedly connected to the several metal springs 146 on the inner wall of the receiving groove 145, and a scraper 141 is fixedly connected to the several metal springs 146 on the inner wall of the receiving groove 147. Through the elastic pre-tightening force provided by the metal springs 146, the scraper 142 and the scraper 141 continuously adhere to the surface of the valve body 1 and the valve core 13, effectively removing polymer deposits and preventing sealing failure.

[0027] Specifically, scraper 142 is attached to the inner surface of valve body 1, and scraper 2 141 is attached to the outer surface of valve core 13. The dual scraper structure can simultaneously scrape off the polymer on the surfaces of valve body 1 and valve core 13, significantly improving the anti-self-polymerization performance.

[0028] like Figures 1 to 5 As shown, a rotating shaft 144 is fixedly connected to the outer surface of the sealing ring 14. The bottom end of the rotating shaft 144 passes through the valve body 1 and is fixedly connected to an operating rod 143. The sealing ring 14 is driven to rotate by the independent operating rod 143, which can actively clean the sealing surface when the valve is closed, realize online maintenance, and extend the service life of the valve.

[0029] Furthermore, several metal springs 146 are all arc-shaped, and several metal springs 146 are made of titanium alloy. The titanium alloy arc-shaped springs have both high strength and fatigue resistance, and maintain elasticity for a long time in high temperature and corrosive environments, ensuring that the scraper always maintains reliable scraping pressure.

[0030] like Figures 1 to 5 As shown, the valve body 1 is made of carbon steel. The inner layer of the valve body 1 is provided with a hard sealing layer 11, and the outer layer of the valve body 1 is provided with a structural support layer 12. The inner layer of the valve body 1 is a hard sealing layer 11. The carbon steel valve body 1 serves as an intermediate layer, providing sufficient pressure resistance. At the same time, through the synergistic effect with the inner and outer layers, the matching of the thermal expansion coefficient is optimized, reducing the impact of temperature changes on the sealing performance.

[0031] It is worth noting that the structural support layer 12 is made of duplex stainless steel. The duplex stainless steel structural support layer 12 has high strength and resistance to stress corrosion, effectively resisting the vibration and pressure fluctuations of the pipeline system and protecting the internal structure from mechanical damage.

[0032] like Figures 1 to 5 As shown, the hard sealing layer 11 is made of zirconia coating material. Zirconia coating has high hardness and low coefficient of friction, which not only provides excellent wear resistance, but also reduces frictional resistance with scraper 142, reduces operating torque, and improves sealing reliability.

[0033] Working principle and process: When special anti-polymerization maintenance is required, the rotating shaft 144 is independently driven by the operating lever 143 to rotate the sealing ring 14. The elastic support of the metal spring 146 enables the scraper to scrape off the polymer deposits on the surface of the hard sealing layer 11 of the valve body 1 and the valve core 13 with stable pressure. In the three-layer valve body 1 structure, the duplex stainless steel support layer bears the pipeline load, the carbon steel intermediate layer transmits pressure, and the zirconia hard sealing layer 11 ensures the sealing accuracy. Combined with the multi-layer composite design of the sealing ring 14, it effectively inhibits the deposition and self-polymerization of polymeric media in the valve, and is suitable for harsh working conditions such as oil refining and chemical industry.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-layer composite protective anti-self-polymerization hard-seal ball valve, comprising a valve body (1), characterized in that: A valve stem (2) is installed at the top of the valve body (1). The bottom end of the valve stem (2) passes through the valve body (1) and is fixedly connected to the valve core (13). A sealing ring (14) is provided on the outer surface of the valve core (13). The sealing ring (14) is rotatably connected to the valve stem (2). A receiving groove 1 (145) is opened on the outer surface of the sealing ring (14), and a receiving groove 2 (147) is opened on the inner surface of the sealing ring (14). Several metal springs (146) are fixedly connected to one side of the inner wall of the receiving groove 1 (145) and the receiving groove 2 (147). Several metal springs (146) located on the inner wall of the receiving groove 1 (145) are fixedly connected to a scraper 1 (142). Several metal springs (146) located on the inner wall of the receiving groove 2 (147) are fixedly connected to a scraper 2 (141).

2. The multi-layer composite protective anti-self-polymerization hard-seal ball valve according to claim 1, characterized in that: The first scraper (142) is attached to the inner surface of the valve body (1), and the second scraper (141) is attached to the outer surface of the valve core (13).

3. The multi-layer composite protective anti-self-polymerization hard-seal ball valve according to claim 1, characterized in that: The outer surface of the sealing ring (14) is fixedly connected to a rotating shaft (144), and the bottom end of the rotating shaft (144) passes through the valve body (1) and is fixedly connected to an operating rod (143).

4. The multi-layer composite protective anti-self-polymerization hard-seal ball valve according to claim 1, characterized in that: Several of the aforementioned metal springs (146) are arc-shaped, and several of the metal springs (146) are made of titanium alloy.

5. A multi-layer composite protective anti-self-polymerization hard-seal ball valve according to claim 1, characterized in that: The valve body (1) is made of carbon steel. The inner layer of the valve body (1) is provided with a hard sealing layer (11), and the outer layer of the valve body (1) is provided with a structural support layer (12).

6. A multi-layer composite protective anti-self-polymerization hard-seal ball valve according to claim 5, characterized in that: The structural support layer (12) is made of duplex stainless steel.

7. A multi-layer composite protective anti-self-polymerization hard-seal ball valve according to claim 5, characterized in that: The hard sealing layer (11) is made of zirconium oxide coating material.

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