Quick three-way valve

Abstract

The utility model relates to the technical field of valves, in particular to a quick three-way valve which comprises a valve body and a valve assembly connected in the valve body in a sliding mode, and an upper valve port and a lower valve port are coaxially and vertically formed in the valve body. The valve assembly comprises a valve rod connected into the valve body in a sliding mode, an upper valve element and a lower valve element, the upper valve element and the lower valve element are fixed to the valve rod and used for blocking the upper valve port and the lower valve port respectively, and the contact face of the upper valve element and the upper valve port and the contact face of the lower valve element and the lower valve port are both conical faces. An executing mechanism is further arranged outside the valve body and comprises an air cylinder for controlling the valve rod to act and an electromagnetic valve for controlling the air cylinder to act. The three-way valve has excellent wear resistance and anti-scouring capacity and is long in service life, the executing mechanism can guarantee quick response of valve action, and safety and reliability of the valve are effectively enhanced while accurate flow control is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of valves, specifically a quick three-way valve. Background Technology

[0002] Valves are devices used to control the direction, pressure, and flow rate of a medium. For example, they can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media.

[0003] Three-way valves are increasingly widely used due to their high adjustment accuracy, stable and reliable operation, and multi-purpose functionality, and are now applied in multiple industries. Three-way valves are classified by function into diverting valves and confluence valves. Diverting valves can split a fluid medium into two flow paths, replacing two simultaneously operating two-way regulating valves, thus saving on pipeline installation costs and reducing expenses. For example, the existing technology "Balanced Three-Way Valve" (publication number: CN205781051U) discloses a three-way valve that uses an upper valve core and a lower valve core on the valve stem. When the valve stem moves, it drives both valve cores to move together, thereby sealing the two valve ports and achieving flow diversion. However, the existing technology still has the following technical problems:

[0004] In existing technologies, the outer circumference of the valve core is cylindrical, and the left and right outlets are positioned opposite each other and are not on the same axis. When the valve core moves vertically, it can only seal the outlet by covering the left or right outlet with its outer wall. However, the cylindrical valve core has a long axial length, so it needs to move a long distance to ensure that the outer wall of the valve core completely covers the left or right outlet. This results in the valve not opening and closing quickly enough, the valve's flow switching action is slow, the flow rate cannot be accurately controlled, and the safety and reliability are low. Utility Model Content

[0005] This utility model provides a fast three-way valve, which can solve the problem that the opening and closing speed of the existing three-way valve is slow, resulting in the inability to accurately control the flow rate and causing low valve safety and reliability.

[0006] This application provides the following technical solution: a quick-release three-way valve, comprising a valve body and a valve assembly slidably connected within the valve body.

[0007] The valve body has an upper valve port and a lower valve port arranged coaxially and vertically.

[0008] The valve assembly includes a valve stem slidably connected to the valve body, and an upper valve core and a lower valve core fixed on the valve stem. The upper valve core and the lower valve core are used to block the upper valve port and the lower valve port, respectively. The contact surface between the upper valve core and the upper valve port, and the contact surface between the lower valve core and the lower valve port are both conical surfaces.

[0009] The valve body is also provided with an actuator, which includes a cylinder for controlling the movement of the valve stem and a solenoid valve for controlling the movement of the cylinder.

[0010] Beneficial effects:

[0011] This solution improves valve opening and closing speed, achieves precise flow control, and enhances valve safety and reliability. The upper and lower valve ports are coaxially and vertically positioned, with the valve core and port sealing surfaces being conical. Driven by the valve stem, the upper or lower valve core can quickly seal the entire upper or lower valve port axially. Compared to existing technologies that use the outer wall of the valve core to cover the port diametrically, this solution requires only a short stroke of the valve core to quickly seal the corresponding port, significantly shortening valve opening and closing time. The conical sealing surface enhances the sealing effect and effectively prevents media leakage. Simultaneously, the solenoid valve uses electronic control to rapidly intake and exhaust the cylinder, accelerating the cylinder's drive of the valve stem and the upper and lower valve cores, further improving the valve's opening and closing response speed. This allows the three-way valve to complete port switching within 200ms-250ms, achieving precise flow control and enhancing valve safety and reliability.

[0012] Furthermore, the solenoid valve is connected to the air port of the cylinder through a pipeline, and an intake and exhaust valve is provided on the pipeline.

[0013] Beneficial effects: Since the speed of intake and exhaust affects the movement speed of the cylinder piston rod, and the intake and exhaust valves can realize rapid intake and exhaust of the pipeline, the cylinder response speed is accelerated and the valve stroke control time is shortened.

[0014] Furthermore, the actuator also includes a positioning seat fixed on the valve body and a mounting bracket fixed on the positioning seat. The cylinder and the solenoid valve are fixed on the mounting bracket. The valve stem passes through and is slidably connected in the middle of the positioning seat. A square block is fixed between the piston rod end of the cylinder and the valve stem.

[0015] Beneficial effects: The square block is used to connect the piston rod and valve rod of the cylinder. When the cylinder drives the valve rod to move, the positioning seat can provide guidance for the valve rod, prevent the valve rod from deviating from its movement, and improve the valve's movement accuracy.

[0016] Furthermore, the mounting bracket is equipped with a dial, and a pointer is fixed on the square block, with the tip of the pointer pointing to the dial.

[0017] Beneficial effects: Because the cylinder drives the valve stem to move synchronously, the position of the pointer on the dial can reflect the position of the valve core inside the valve stem in real time, so as to confirm or adjust the position of the valve core and ensure valve accuracy.

[0018] Furthermore, a sealing element is fixed at the sliding connection port between the valve stem and the positioning seat.

[0019] Beneficial effects: The seal can prevent the medium in the valve body from leaking through the gap between the valve stem and the positioning seat, ensuring the valve body's sealing performance.

[0020] Furthermore, the valve body is provided with a left port, a right port and a lower port that are interconnected; the left port and the right port are connected through the upper valve port, and the left port and the lower port are connected through the lower valve port.

[0021] Beneficial effects: The upper and lower valve ports serve as the connecting medium for each port, and also facilitate contact with the lower and upper valve cores to achieve the switching of the passages for each port.

[0022] Furthermore, a connector is provided at the bottom of the valve body, and a through hole is provided in the middle of the connector. One end of the connector extends into the orifice in the valve body to form a lower valve port, and the through hole of the connector forms a lower through port.

[0023] Beneficial effects: The connector serves as the communication medium between the pipeline and the valve body, facilitating the transport of the medium from the lower port to the outside.

[0024] Furthermore, a cobalt-based alloy layer is provided on the conical surfaces of the upper valve core, lower valve core, upper valve port, and lower valve port.

[0025] Beneficial effects: Cobalt-based alloys have excellent corrosion resistance, wear resistance and high temperature resistance, which increases wear resistance and extends valve service life. Attached Figure Description

[0026] Figure 1 This is the main structural view of the present invention. Detailed Implementation

[0027] The following detailed description illustrates the specific implementation method:

[0028] The markings in the accompanying drawings include: cylinder 1, solenoid valve 2, dial 3, pointer 4, square block 5, valve stem 6, positioning seat 7, upper valve core 8, valve body 9, left port 10, connector 11, lower valve core 12, right port 13, seal 14, mounting bracket 15, piston rod 16, intake and exhaust valve 17, and lower port 18.

[0029] Example 1

[0030] In this embodiment, the three-way valve is used in the water-cooling section of a high-speed wire rod mill in a steel plant. It is installed in the pipeline of the temperature-controlled water-cooling box of the mill and can be used in environments with high humidity and metal dust.

[0031] like Figure 1As shown, the quick three-way valve includes a valve body 9, an actuator fixed on the valve body 9, a connector 11 fixed below the valve body 9, and a valve assembly slidably connected within the valve body 9.

[0032] The valve body 9 is made of 304 stainless steel. The valve body 9 has a left port 10, a right port 13 and a lower port 18 that are interconnected. At the vertical center of the valve body 9, an upper valve port and a lower valve port are coaxially arranged from top to bottom. The left port 10 and the right port 13 are connected through the upper valve port, and the left port 10 and the lower port are connected through the lower valve port. The upper end of the connector 11 extends into the valve body 9, and the orifice of the connector 11 extending into the valve body 9 forms the lower valve port. The middle part of the connector 11 has a through hole, and the through hole forms the lower port 18.

[0033] The valve assembly includes a valve stem 6 vertically slidably connected within the valve body 9, and an upper valve core 8 and a lower valve core 12 fixed to the valve stem 6. The upper valve core 8 and the lower valve core 12 are used to seal the upper and lower valve ports, respectively. The contact surfaces between the upper valve core 8 and the upper valve port, and between the lower valve core 12 and the lower valve port, are both conical surfaces. A cobalt-based alloy layer is provided on the conical surfaces of the upper valve core 8, the lower valve core 12, the upper valve port, and the lower valve port. Since the temperature control water used in the steel rolling line is turbid circulating water, which has high turbidity and contains a large amount of suspended solids, particulate matter, and other impurities, the cobalt-based alloy layer on the valve port sealing surface can achieve the purpose of resisting erosion and wear. At the same time, the valve stem 6, the upper valve core 8, and the lower valve core 12 are all made of 304 stainless steel, which can increase the valve's corrosion resistance, wear resistance, and high temperature resistance, and extend the valve's service life.

[0034] The actuator includes a positioning seat 7 fixed on the valve body 9, a mounting bracket 15 fixed on the positioning seat 7, a cylinder 1 fixed on the mounting bracket 15, and a solenoid valve 2 fixed on the mounting bracket 15. The solenoid valve 2 is used to control the action of the cylinder 1. The solenoid valve 2 is connected to the air port of the cylinder 1 through a pipeline, and an intake and exhaust valve 17 is provided at the interface between the pipeline and the air port of the cylinder 1. The intake and exhaust valve 17 can accelerate the intake and exhaust speed and improve the response speed of the piston rod 16 of the cylinder 1. The valve rod 6 passes through and is slidably connected in the middle of the positioning seat 7. A sealing element 14 is fixed at the sliding connection port between the valve rod 6 and the positioning seat 7. The sealing element 14 can prevent the medium in the valve body 9 from leaking from the sliding gap between the valve rod 6 and the positioning seat 7, thus ensuring the sealing of the valve body 9.

[0035] A square block 5 is fixed to the end of the piston rod 16 of the cylinder 1, extending from the upper end of the valve stem 6 out of the positioning seat 7. A pointer 4 is horizontally fixed on the square block 5. A scale 3 is provided on the inner side of the mounting bracket 15, and the tip of the pointer 4 points to the scale 3. The position of the pointer 4 on the scale 3 can reflect the position of the valve core in the valve body 9 in real time, so as to facilitate the confirmation or adjustment of the valve core position and ensure valve accuracy.

[0036] The usage method of this three-way valve is as follows:

[0037] This three-way valve is a diversion valve. The medium enters from the left port 10 and flows out from the right port 13 and the lower port 18. When the medium needs to flow out from the right port 13, the solenoid valve 2 controls the piston rod 16 of the cylinder 1 to extend, and drives the valve rod 6 to move downward, so that the lower valve core 12 blocks the lower valve port downward, so that the medium can flow from the left port 10 through the upper valve port to the right port 13. When the medium needs to flow out from the lower port 18, the solenoid valve 2 controls the piston rod 16 of the cylinder 1 to retract, and the valve rod 6 moves upward, so that the upper valve core 8 blocks the upper valve port, so that the medium can flow out from the left port 10 through the lower port 18.

[0038] Because this design sets the upper and lower valve ports coaxially and vertically, and the sealing surfaces of the valve core and valve ports are conical, the upper valve core 8 or lower valve core 12, driven by the valve stem 6, can quickly seal the entire upper or lower valve port in the axial direction, shortening the valve opening and closing time. Furthermore, the conical sealing surface enhances the sealing effect and effectively prevents media leakage. Simultaneously, because the solenoid valve 2 uses electronic control to quickly intake and exhaust air from the cylinder 1, the speed at which the cylinder 1 drives the valve stem 6, upper valve core 8, and lower valve core 12 is increased, further improving the valve's opening and closing response speed. This allows the three-way valve to complete the valve port switching action within 200ms-250ms, achieving precise flow control and enhancing the valve's safety and reliability.

[0039] The above are merely embodiments of this utility model, and the utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A quick-acting three-way valve, comprising a valve body and a valve assembly slidably connected within the valve body, characterized in that: The valve body has an upper valve port and a lower valve port arranged coaxially and vertically. The valve assembly includes a valve stem slidably connected to the valve body, and an upper valve core and a lower valve core fixed on the valve stem. The upper valve core and the lower valve core are used to block the upper valve port and the lower valve port, respectively. The contact surface between the upper valve core and the upper valve port, and the contact surface between the lower valve core and the lower valve port are both conical surfaces. The valve body is also provided with an actuator, which includes a cylinder for controlling the movement of the valve stem and a solenoid valve for controlling the movement of the cylinder.

2. The quick-acting three-way valve according to claim 1, characterized in that: The solenoid valve is connected to the air port of the cylinder through a pipeline, and an intake and exhaust valve is installed on the pipeline.

3. The quick-acting three-way valve according to claim 2, characterized in that: The actuator also includes a positioning seat fixed on the valve body and a mounting bracket fixed on the positioning seat. The cylinder and the solenoid valve are fixed on the mounting bracket. The valve stem passes through and is slidably connected in the middle of the positioning seat. A square block is fixed between the piston rod end of the cylinder and the valve stem.

4. The quick-acting three-way valve according to claim 3, characterized in that: The mounting bracket is equipped with a dial, and a pointer is fixed on the square block, with the tip of the pointer pointing to the dial.

5. The quick-acting three-way valve according to claim 4, characterized in that: A sealing element is fixed at the sliding connection between the valve stem and the positioning seat.

6. The quick-acting three-way valve according to claim 5, characterized in that: The valve body has a left port, a right port and a lower port that are interconnected; the left port and the right port are connected through the upper valve port, and the left port and the lower port are connected through the lower valve port.

7. The quick-acting three-way valve according to claim 6, characterized in that: The valve body has a connector in the lower port, and the connector has a through hole in the middle. One end of the connector extends into the orifice in the lower port to form the lower valve port, and the through hole of the connector forms the lower port.

8. The quick-acting three-way valve according to claim 7, characterized in that: The upper and lower valve ports are provided with a cobalt-based alloy layer on their conical surfaces.

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