A coaxial valve with improved sealing property

Abstract

The invention relates to a coaxial valve (1) comprising at least one body (10) having at least one flow path (11) to allow fluid passage there through, at least one inlet port (12) to allow fluid entry into the flow path (11 ), at least one outlet port (13) for discharging fluid from the flow path (11), at least one piston (14) that is connectable to at least one plug (16) by being moved in the direction of extension around the flow path (11) to restrict fluid passage through the flow path (11), and at least one sealing element (18) for providing sealing between the piston (14) and the plug (16). The novelty of the invention is characterized in that the plug (16) is dimensioned to enter into the piston (14), and the sealing element (18) is positioned between a plug outer surface (17) on the side of the plug (16) facing the piston (14) and a piston inner surface (15) on the side of the piston (14) facing the plug (16).

Description

[0001] A COAXIAL VALVE WITH IMPROVED SEALING PROPERTY

[0002] TECHNICAL FIELD

[0003] The invention relates to a coaxial valve comprising at least one body having at least one flow path to allow fluid passage therethrough, at least one inlet port to allow fluid entry into the flow path, at least one outlet port for discharging fluid from the flow path, at least one piston that is connectable to at least one plug by being moved in the direction of extension around the flow path to restrict fluid passage through the flow path, and at least one sealing element for providing sealing between the piston and the plug.

[0004] PRIOR ART

[0005] A coaxial valve is a type of industrial valve designed for fluid control, in which the inlet and outlet flow paths are aligned on the same axis and which includes a directly actuated control mechanism. The basic operating principle of the valve is based on performing the opening and closing operations by moving a piston or a slide back and forth through a magnetic or pneumatic power source. This structure offers advantages such as fast response times, high flow capacities, and reliable operation at high pressure levels.

[0006] Coaxial valves, by providing direct flow control, allow high fluid permeability even at low pressure differences. The presence of a minimum number of moving parts in the internal structure reduces the risk of wear, extends service life, and minimizes maintenance requirements. In addition, the main body of the valve is generally made of corrosion-resistant materials such as stainless steel, brass, or aluminum, and ensures compatibility with various types of fluids. Thanks to these features, coaxial valves have a wide range of applications, such as fuel lines in the automotive industry, control of aggressive fluids in the chemical and pharmaceutical sectors, hygienic processes in the food industry, and precise flow control in industrial automation systems.One of the most common problems in coaxial valves is leakage, which typically occurs due to seal wear, incorrect assembly, or deformation of the sealing material under high pressure. In addition, wear of the piston or slide mechanism during prolonged use of the valve may adversely affect precise flow control. Particles or contaminants present in the fluid may accumulate on the inner surfaces of the valve, causing the mechanism to jam and malfunction. Inadequate maintenance, especially in applications involving aggressive chemicals or high temperatures, may trigger issues such as corrosion and material fatigue. Moreover, manufacturing defects in the valve body or connection points may increase pressure losses in the system and negatively affect overall performance.

[0007] As a result, all of the problems mentioned above have made it necessary to introduce an innovation in the relevant technical field.

[0008] BRIEF DESCRIPTION OF THE INVENTION

[0009] The present invention relates to a coaxial valve intended to eliminate the above-mentioned disadvantages and to introduce new advantages to the relevant technical field.

[0010] The objective of this invention is to improve the sealing performance in coaxial valves and to ensure long-term reliable operation of the valve. In particular, it is aimed to ensure reliable operation of the valve even under high pressure through the effective placement of sealing elements. Additionally, designing the components in a compact and modular structure is intended to facilitate manufacturing and maintenance processes.

[0011] In order to achieve all the objectives mentioned above and those that will become apparent from the detailed description below, the present invention is a coaxial valve comprising at least one body having at least one flow path to allow fluid passage therethrough, at least one inlet port to allow fluid entry into the flow path, at least one outlet port for discharging fluid from the flow path, at least one piston that is connectable to at least one plug by being moved in the direction of extensionaround the flow path to restrict fluid passage through the flow path, and at least one sealing element for providing sealing between the piston and the plug. Accordingly, the novelty lies in that the plug is dimensioned to enter into the piston, and the sealing element is positioned between a plug outer surface on the side of the plug facing the piston and a piston inner surface on the side of the piston facing the plug.

[0012] In a possible embodiment of the invention, the sealing element is at least partially accommodated within at least one channel. In this way, the sealing element is held in a fixed position under high pressure and mechanical loads inside the valve, which prevents the deformation and displacement of the element, thereby providing long-lasting and reliable sealing.

[0013] In another possible embodiment of the invention, the channel is positioned on one of the piston inner surface or the plug outer surface. Thus, the contact surface of the sealing element with the mechanical components is optimized, minimizing friction and wear, and ensuring smooth operation of the moving parts of the valve.

[0014] In another possible embodiment of the invention, the channel is positioned on the plug outer surface. Thus, the sealing element is fixed on the plug, making it more resistant to fluid pressure, and the sealing performance of the valve is enhanced, especially in high-pressure applications.

[0015] In another possible embodiment of the invention, the sealing element is an O-ring, or in another possible embodiment, in order to provide high sealing performance, the sealing element comprises an inner part made of elastomer-based polymer materials and an outer part made of high-strength polymers surrounding the inner part and supporting it in terms of mechanical and pressure resistance. In this way, the sealing element exhibits high elasticity and pressure resistance, preventing fluid leakage and providing flexible adaptation to different operating conditions.

[0016] In another possible embodiment of the invention, the piston and the plug have a circular form. Thus, the fluid is evenly distributed along the flow path, the sealingelement operates under uniform pressure, and the overall mechanical strength of the valve is increased.

[0017] BRIEF DESCRIPTION OF THE DRAWING

[0018] Figure 1 shows a schematic sectional view of the coaxial valve of the invention.

[0019] DETAILED DESCRIPTION OF THE INVENTION

[0020] In this detailed description, the subject matter of the invention is explained by way of examples provided solely for better understanding and without any limiting effect.

[0021] A schematic sectional view of the coaxial valve (1) of the invention is shown in Figure 1. Accordingly, the coaxial valve (1) of the invention is a type of valve that enables the controlled transfer of a fluid from at least one inlet port (12) to at least one outlet port (13), and includes at least one piston (14) and at least one plug (16) to interrupt or restrict this transfer. The structure of the coaxial valve (1) ensures the alignment of the inlet port (12) and the outlet port (13) on the same axis. This structure allows the fluid to flow uninterrupted and without turbulence. The coaxial valve (1) comprises at least one body (10). The body (10) constitutes the main structure of the system and provides a durable structure that protects all internal components. The body (10) enables the fluid to proceed along at least one flow path (11 ). The inlet port (12) and the outlet port (13) on the body (10) allow the fluid to enter and exit the system. The flow path (11) is the channel (19) through which the fluid is directed within the coaxial valve (1). This flow path (11) is shaped in a linear form to ensure the movement of the fluid with minimal resistance.

[0022] The piston (14) located on the coaxial valve (1) is one of the most critical moving components of the coaxial valve (1). The piston (14) is used to initiate, stop, or partially restrict the flow of fluid. The piston (14) generally moves back and forth in the direction of extension along the flow path (11), and this movement is typically provided by a pneumatic, hydraulic, or electric actuator. On the side of the piston (14) facing the plug (16), there is at least one piston inner surface (15). The piston inner surface (15) is the region that comes into direct contact with the plug (16)inside the coaxial valve (1) and works together with the sealing element (18) to prevent leakage. This piston inner surface (15) maintains tight contact with the region where the plug (16) and the sealing element (18) are located, thereby providing sealing even under high pressure.

[0023] The plug (16) is a component used in the coaxial valve (1) to restrict or completely stop the flow of fluid. The plug (16) interlocks with the piston (14) through its movement, thereby blocking the passage of fluid and ensuring that the system operates reliably at a certain pressure. The plug (16) is formed in such a way that it fully enters into the piston (14) as a result of the piston’s (14) movement. On the side of the plug (16) facing the piston (14), there is at least one plug outer surface (17). When the plug outer surface (17) enters the piston inner surface (15), the flow path (11) is closed.

[0024] In order to ensure complete sealing between the piston (14) and the plug (16), at least one sealing element (18) is positioned between them. The sealing element (18) can be located on at least one of the plug outer surface (17) and the piston inner surface (15). In the preferred embodiment of the invention, the sealing element (18) is positioned on the plug outer surface (17). The sealing element (18) is generally an elastomeric component designed in the form of an O-ring. In a possible embodiment of the invention, the sealing element (18) consists of two main parts: an inner part made of elastomer-based polymer materials (e.g., NBR or HNBR rubber) to provide high sealing performance; and an outer part made of high-strength polymers such as polytetrafluoroethylene (PTFE), polyoxymethylene, or polyamide, which surrounds the inner part and supports it in terms of mechanical and pressure resistance. This structure enhances the sealing element’s (18) resistance against deformation, bursting, and displacement from its housing. By being positioned between the piston inner surface (15) and the plug outer surface (17), it prevents fluid leakage and ensures complete sealing within the interior of the coaxial valve (1).

[0025] As a result, the sealing element (18), positioned between the piston inner surface (15) and the plug outer surface (17), is a critical component that ensures the reliable operation of the coaxial valve (1) even under high pressure. This structurenot only enables effective control of fluid flow, but also allows the sealing element (18) to be exposed to uniform pressure distribution on both surfaces. Thus, leakages that may occur due to pressure differences are minimized. This strategic placement of the sealing element (18) not only prevents fluid loss, but also increases energy efficiency in the system and extends the service life of the coaxial valve (1). Especially in applications involving aggressive fluids or high pressure, this design provides superior performance and long-term durability compared to conventional valve systems, offering a reliable solution in industrial processes.

[0026] The scope of protection of the invention is defined in the claims attached hereto and shall by no means be limited to the examples described in this detailed description. It is evident that a person skilled in the art may develop similar embodiments in light of the above explanations without departing from the main concept of the invention.REFERENCE NUMBERS GIVEN IN THE DRAWING

[0027] 1 Coaxial Valve

[0028] 10 Body

[0029] 11 Flow Path

[0030] 12 Inlet Port

[0031] 13 Outlet Port

[0032] 14 Piston

[0033] 15 Piston Inner Surface

[0034] 16 Plug

[0035] 17 Plug Outer Surface

[0036] 18 Sealing Element

[0037] 19 Channel

Claims

CLAIMS1. A coaxial valve (1 ) comprising at least one body (10) having at least one flow path (11) to allow fluid passage therethrough, at least one inlet port (12) to allow fluid entry into the flow path (11), at least one outlet port (13) for discharging fluid from the flow path (11), at least one piston (14) that is connectable to at least one plug (16) by being moved in the direction of extension around the flow path (11) to restrict fluid passage through the flow path (11), and at least one sealing element (18) for providing sealing between the piston (14) and the plug (16), characterized in that the plug (16) is dimensioned to enter into the piston (14), and the sealing element (18) is positioned between a plug outer surface (17) on the side of the plug (16) facing the piston (14) and a piston inner surface (15) on the side of the piston (14) facing the plug (16).

2. The coaxial valve (1) according to Claim 1, characterized in that it comprises at least one channel (19) for at least partially accommodating the sealing element (18).

3. The coaxial valve (1) according to Claim 2, characterized in that the channel (19) is positioned on one of the piston inner surface (15) or the plug outer surface (17).

4. The coaxial valve (1) according to Claim 2, characterized in that the channel (19) is positioned on the plug outer surface (17).

5. The coaxial valve (1) according to Claim 1, characterized in that the sealing element (18) is an O-ring.

6. The coaxial valve (1) according to Claim 1, characterized in that in order to provide high sealing performance, the sealing element (18) comprises an inner part made of elastomer-based polymer materials and an outer part made of high-strength polymers surrounding the inner part and supporting it in terms of mechanical and pressure resistance.

7. The coaxial valve (1) according to Claim 1, characterized in that the piston (14) and the plug (16) have a circular form.

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