Electromagnetic valve capable of controlling dosage

Abstract

The utility model belongs to the technical field of electromagnetic valves, and particularly relates to an electromagnetic valve capable of controlling dosage, which comprises a valve body, an inlet and an outlet are arranged on the valve body, a main cavity is arranged between the inlet and the outlet, a cover plate is arranged on the valve body, a magnetism isolating pipe is mounted on the cover plate, a coil is wound on the periphery of the magnetism isolating pipe, and an upper top block is arranged at the top of the magnetism isolating pipe. A fixing nut is arranged on the upper ejecting block, a movable iron core is movably connected into the magnetism isolating pipe, a spring is installed between the movable iron core and the upper ejecting block, a diaphragm is arranged between the cover plate and the magnetism isolating pipe, one face of the diaphragm makes contact with the bottom of the movable iron core, the other face of the diaphragm makes contact with the main cavity, and an adjusting cavity is formed in one side of the main cavity. The flow adjusting mechanism used for adjusting the flow is arranged in the adjusting cavity, the non-return mechanism used for preventing fluid from flowing back is arranged at the outlet of the main cavity, and the flow control requirements under different working conditions can be met through the arranged flow adjusting mechanism.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic valve technology, specifically relating to an electromagnetic valve that can control the dosage of medicine. Background Technology

[0002] Solenoid valves are actuators used for automated pipeline control. Their function is to automatically control the on / off state, direction, flow rate, and volume of fluid in a pipeline, enabling remote control. Solenoid valves also feature fast response time, low cost, strong controllability, and high reliability. Dosing solenoid valves are specifically designed for special pipeline media, primarily controlling the dosing of chemicals into containers. They are widely used in the pharmaceutical, chemical, and instrumentation industries. Generally, these special media are corrosive, and secondary contamination must be avoided, a function that conventional solenoid valves lack. Currently, most common dosing valves on the market are pneumatically controlled and isolated. A significant drawback of these valves is the need for an additional air source and control valve, which greatly increases operating costs, and their complex structure and high maintenance costs further complicate their operation. However, for dosing solenoid valves, flow rate adjustability is essential for precise control of the dosage, a function that conventional solenoid valves lack. Summary of the Invention

[0003] I. Technical problems to be solved

[0004] This invention addresses the aforementioned deficiencies in existing technologies by proposing a controllable solenoid valve for chemical dosing. Through its flow regulation mechanism, it can meet the flow control requirements under different operating conditions, thereby solving the problem that conventional solenoid valves lack flow regulation functionality.

[0005] II. Technical Solution

[0006] To solve the above-mentioned technical problems, the present invention provides a solenoid valve for controlling the dosage of chemicals, including a valve body with an inlet and an outlet, a main chamber between the inlet and the outlet, a cover plate on the valve body, a magnetic shielding tube installed on the cover plate, a coil wound around the outer periphery of the magnetic shielding tube, an upper block on the top of the magnetic shielding tube, a fixing nut on the upper block, a movable iron core movably connected inside the magnetic shielding tube, a spring installed between the movable iron core and the upper block, a diaphragm between the cover plate and the magnetic shielding tube, one side of the diaphragm contacting the bottom of the movable iron core, the other side of the diaphragm contacting the main chamber, an adjustment chamber on one side of the main chamber, a flow adjustment mechanism for adjusting the flow rate in the adjustment chamber, and a check mechanism to prevent fluid backflow at the outlet of the main chamber.

[0007] The flow regulation mechanism is used to change the flow area of ​​the main chamber.

[0008] Preferably, the main chamber includes an inlet chamber, a main valve chamber, and an outlet chamber, with the inlet connected to the inlet chamber, the regulating chamber connected to the main valve chamber, and the outlet connected to the outlet chamber.

[0009] Preferably, the flow regulating mechanism includes an regulating bolt disposed inside the regulating cavity, an O-ring disposed on the regulating bolt, and an arc-shaped regulating surface disposed at the top of the regulating bolt, the arc-shaped regulating surface being inserted into the main valve cavity.

[0010] Preferably, the check mechanism includes a check seat disposed inside the outlet cavity, a check block disposed on the check seat, a check spring disposed between the check seat and the check block, and a sealing ring disposed on the check block.

[0011] Preferably, when the check spring is in its initial state, the check block closes the main valve chamber.

[0012] Preferably, the diaphragm is made of rubber, and the outer periphery of the diaphragm is pressed and fixed by the cover plate and the magnetic shielding tube.

[0013] Preferably, the movable iron core is provided with two iron core guide rings.

[0014] III. Beneficial Effects

[0015] Compared with the prior art, the present invention, through its flow regulation mechanism, can meet the flow control requirements under different operating conditions.

[0016] The check valve mechanism prevents backflow, and the diaphragm at the inlet prevents secondary contamination of the medium. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of a solenoid valve that can control the dosage of chemicals.

[0018] Figure 2 This is a cross-sectional view of the flow regulating mechanism and check mechanism of a solenoid valve that can control the dosage of chemicals.

[0019] Figure 3 This is a cross-sectional view of the main chamber of a solenoid valve that can control the dosage of chemicals.

[0020] In the picture:

[0021] 1 is the valve body; 11 is the inlet; 12 is the outlet; 13 is the main chamber; 131 is the inlet cavity; 132 is the main valve chamber; 133 is the outlet cavity; 14 is the regulating chamber; 2 is the cover plate; 3 is the magnetic shielding tube; 31 is the top block; 32 is the fixing nut; 4 is the coil; 5 is the movable iron core; 52 is the iron core guide ring; 6 is the spring; 7 is the diaphragm; 8 is the flow regulating mechanism; 81 is the adjusting bolt; 82 is the O-ring; 83 is the arc-shaped adjusting surface; 9 is the check mechanism; 91 is the check seat; 92 is the check block; 93 is the check spring; 94 is the sealing ring. Detailed Implementation

[0022] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0023] Combination Figure 1 , Figure 2 and Figure 3 As shown, the solenoid valve for controlling the dosage of the chemical in this embodiment includes a valve body 1, which is the basic supporting component of the entire solenoid valve. The valve body 1 is provided with an inlet 11 and an outlet 12, and a main chamber 13 is provided between the inlet 11 and the outlet 12. The inlet 11 is used to introduce the fluid to be controlled, and the outlet 12 outputs the controlled fluid. The main chamber 13 is the core area for fluid flow and control.

[0024] A cover plate 2 is provided on the valve body 1, and a magnetic shielding tube 3 is installed on the cover plate 2. The function of the magnetic shielding tube 3 is to isolate the magnetic field and prevent the magnetic field from interfering with the surrounding environment and other components. A coil 4 is wound around the outer periphery of the magnetic shielding tube 3, and an upper block 31 is provided on the top of the magnetic shielding tube 3. A fixing nut 32 is provided on the upper block 31. The coil 4 is the driving component of the solenoid valve. When current is applied, a magnetic field is generated, thereby driving the movable iron core 5 to move. The upper block 31 provides an upper limit for the movement of the movable iron core 5, ensuring that the movable iron core 5 moves within a specified range. The fixing nut 32 is used to firmly fix the magnetic shielding tube 3 and the upper block 31 to the cover plate 2, ensuring the stability and reliability of the entire structure.

[0025] A movable iron core 5 is movably connected inside the magnetic shielding tube 3. A spring 6 is installed between the movable iron core 5 and the upper top block 31. The movable iron core 5, movably connected inside the magnetic shielding tube 3, is the actuating component of the solenoid valve. When current is passed through the coil 4 to generate a magnetic field, the movable iron core 5 will move upward or downward under the action of magnetic force. The spring 6 installed between the movable iron core 5 and the upper top block 31 returns the movable iron core 5 to its initial position when it is not under the action of magnetic force.

[0026] A diaphragm 7 is provided between the cover plate 2 and the magnetic shielding tube 3. One side of the diaphragm 7 contacts the bottom of the movable iron core 5, and the other side of the diaphragm 7 contacts the main chamber 13. The diaphragm 7 is provided between the cover plate 2 and the magnetic shielding tube 3. The diaphragm 7 has good elasticity and sealing performance. An adjustment chamber 14 is provided on one side of the main chamber 13. A flow adjustment mechanism 8 for adjusting the flow rate is provided in the adjustment chamber 14. The flow adjustment mechanism 8 can precisely adjust the flow rate of the fluid in the main chamber 13 by changing the pressure or flow channel area in the adjustment chamber 14 according to actual needs.

[0027] When current flows through coil 4, a magnetic field is generated. This magnetic force overcomes the elastic force of spring 6, causing the movable iron core 5 to move upward. This opens the fluid passage, allowing fluid to flow in from inlet 11, pass through the main chamber 13 and regulating chamber 14, and then flow out from outlet 12. When coil 4 is de-energized, the magnetic field disappears, the elastic force of spring 6 causes the movable iron core 5 to move downward, and diaphragm 7 closes the fluid passage, preventing fluid flow. Simultaneously, check valve 9 ensures that fluid does not flow back.

[0028] Combination Figure 2 and Figure 3 As shown, the main chamber 13 includes an inlet cavity 131, a main valve chamber 132, and an outlet cavity 133. The inlet 11 communicates with the inlet cavity 131, the regulating chamber 14 communicates with the main valve chamber 132, and the outlet 12 communicates with the outlet cavity 133. Specifically, the inlet cavity 131 is the initial channel for fluid to enter the solenoid valve. The inlet cavity 131 is directly connected to the inlet 11 on the valve body 1. When fluid enters the solenoid valve from an external pipe through the inlet 11, it first converges into the inlet cavity 131. The inlet cavity 131 ensures smooth fluid flow, reducing fluid resistance and turbulence.

[0029] The main valve chamber 132 is the core area for fluid control by the solenoid valve, and it is interconnected with the regulating chamber 14. This allows pressure changes in the regulating chamber 14 to be rapidly transmitted to the main valve chamber 132, thus affecting the flow state of the fluid within the main valve chamber 132. The main valve chamber 132 controls the opening and closing of the fluid. When the movable iron core 5 moves upward or downward under the action of electromagnetic force, it controls the connection and disconnection between the inlet chamber 131 and the main valve chamber 132 via the diaphragm 7. The outlet chamber 133 is the final channel for fluid to flow out of the solenoid valve, and it is connected to the outlet 12 on the valve body 1. The fluid controlled by the main valve chamber 132 flows smoothly into the outlet chamber 133 and is output to the external pipeline through the outlet 12.

[0030] When the solenoid valve is in operation, i.e., when coil 4 is energized, the solenoid valve is in the open state, and fluid enters the inlet chamber 131 from inlet 11 and then flows into the main valve chamber 132. At this time, according to actual needs, the depth of the flow regulating mechanism 8 entering the main valve chamber 132 is adjusted, thereby changing the flow area. The change in the flow area will change the flow rate at outlet 12, thus providing a flow regulation function.

[0031] Combination Figure 1 and Figure 2As shown, the flow regulating mechanism 8 includes an adjusting bolt 81 disposed inside the regulating cavity 14, which engages with the internal thread on the inner wall of the regulating cavity 14. This not only facilitates installation but also enables precise adjustment. By rotating the adjusting bolt 81, its position within the regulating cavity 14 can be changed, thereby adjusting the flow area of ​​the fluid within the main valve cavity 132 to achieve flow control.

[0032] An O-ring 82 is installed on the adjusting bolt 81. The main function of the O-ring 82 is to prevent fluid leakage within the adjusting chamber 14, ensuring the accuracy and stability of flow regulation. An arc-shaped adjusting surface 83 is provided at the top of the adjusting bolt 81, and this surface inserts into the main valve chamber 132. The arc-shaped adjusting surface 83 is a key structure for achieving precise flow regulation in the flow regulation mechanism 8. The arc-shaped adjusting surface 83 ensures optimal regulation when in contact with the fluid within the main valve chamber 132.

[0033] Combination Figure 1 , Figure 2 As shown, the check mechanism 9 includes a check seat 91 disposed inside the outlet cavity 133. The check seat 91 is designed as a seat with a specific shape, and has an internal mounting groove and guide structure that mate with the check block 92.

[0034] A check block 92 is provided on the check seat 91, and the check block 92 can move axially under the action of the check spring 93. The check block 92 is usually cylindrical or conical in shape, and its end is machined with a working surface that contacts the fluid. When the fluid flows in the forward direction, the check block 92 will overcome the elastic force of the check spring 93 under the action of the fluid pressure, thereby opening the fluid passage and allowing the fluid to flow out smoothly. When the fluid attempts to flow in the reverse direction, the check block 92 will move rapidly towards the outlet 12 under the action of the flow pressure and the elastic force of the check spring 93, tightly fitting against the sealing surface of the check seat 91, preventing the fluid from flowing back.

[0035] A check spring 93 is provided between the check seat 91 and the check block 92 to provide axial elastic force to the check block 92. The check spring 93 ensures that the check block 92 can respond quickly and accurately to changes in the flow direction of the fluid under different fluid pressure and flow conditions. One end of the check spring 93 abuts against the bottom of the mounting groove of the check seat 91, and the other end abuts against the end face of the check block 92. Under normal operating conditions, the check spring 93 is under a certain compression state, providing sufficient elastic force to the check block 92. A sealing ring 94 is provided on the check block 92. The sealing ring 94 is a key component to ensure the sealing performance of the check mechanism 9. It is usually made of rubber material, such as nitrile rubber or fluororubber, which has good elasticity and sealing performance. The shape design of the sealing ring 94 matches the sealing surfaces of the check block 92 and the check seat 91, and can fit tightly against the sealing surfaces to prevent fluid leakage. The advantages of the check mechanism 9 are its simple structure, reliable operation, and good sealing performance. It can quickly respond to changes in the flow direction of the fluid and effectively prevent fluid backflow.

[0036] When the solenoid valve is open, fluid flows in from the inlet chamber 131, passes through the main valve chamber 132, and finally flows to the outlet chamber 133. The fluid pressure acts on the check block 92, overcoming the preload of the check spring 93, causing the check block 92 to temporarily move away from the outlet of the main valve chamber 132, allowing the fluid to flow smoothly. At this time, the check spring 93 is compressed but still retains sufficient elasticity, ready to quickly push the check block 92 back to its original position when the fluid stops flowing or the pressure decreases, thus effectively preventing fluid backflow. This process is fast and automatic, requiring no external intervention, ensuring that the solenoid valve can quickly and reliably close the outlet under any circumstances, preventing fluid leakage or backflow.

[0037] Combination Figure 1 As shown, the movable iron core 5 is equipped with two core guide rings 52. The main function of the core guide rings 52 is to provide precise guidance and support for the movable iron core 5. When the solenoid valve is working, the movable iron core 5 is driven by electromagnetic force to move up and down within the valve body 1. Without the guidance of the core guide rings 52, the movable iron core 5 may deviate or wobble due to uneven force or external interference, thereby affecting the sealing performance and stability of the solenoid valve. The presence of the core guide rings 52 ensures that the movable iron core 5 always moves along the predetermined trajectory during its movement, avoiding the problems of deviation and wobble.

[0038] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A solenoid valve for controlling the dosage of a chemical, characterized in that, The solenoid valve that can control the dosage includes a valve body (1), an inlet (11) and an outlet (12) on the valve body (1), and a main chamber (13) between the inlet (11) and the outlet (12); A cover plate (2) is provided on the valve body (1), a magnetic shielding tube (3) is installed on the cover plate (2), a coil (4) is wound around the outer periphery of the magnetic shielding tube (3), an upper top block (31) is provided on the top of the magnetic shielding tube (3), a movable iron core (5) is movably connected inside the magnetic shielding tube (3), a spring (6) is installed between the movable iron core (5) and the upper top block (31), a diaphragm (7) is provided between the cover plate (2) and the magnetic shielding tube (3), one side of the diaphragm (7) contacts the bottom of the movable iron core (5), and the other side of the diaphragm (7) contacts the main chamber (13). A regulating chamber (14) is provided on one side of the main chamber (13), a flow regulating mechanism (8) for regulating the flow rate is provided in the regulating chamber (14), and a check mechanism (9) to prevent fluid backflow is provided at the outlet (12) of the main chamber (13). The flow regulation mechanism (8) is used to change the flow area of ​​the main chamber (13).

2. The solenoid valve for controlling the dosage of medicine according to claim 1, characterized in that, The main chamber (13) includes an inlet chamber (131), a main valve chamber (132), and an outlet chamber (133). The inlet (11) is connected to the inlet chamber (131), the regulating chamber (14) is connected to the main valve chamber (132), and the outlet (12) is connected to the outlet chamber (133).

3. The solenoid valve for controlling the dosage of medicine according to claim 2, characterized in that, The flow regulating mechanism (8) includes an regulating bolt (81) disposed inside the regulating cavity (14), an O-ring (82) disposed on the regulating bolt (81), and an arc-shaped regulating surface (83) disposed at the top of the regulating bolt (81), which is inserted into the main valve cavity (132).

4. The solenoid valve for controlling the dosage of medicine according to claim 2, characterized in that, The check mechanism (9) includes a check seat (91) disposed inside the outlet cavity (133), a check block (92) disposed on the check seat (91), a check spring (93) disposed between the check seat (91) and the check block (92), and a sealing ring (94) disposed on the check block (92).

5. A solenoid valve for controlling the dosage of chemicals according to claim 4, characterized in that, When the check spring (93) is in the initial state, the check block (92) closes the main valve chamber (132).

6. A solenoid valve for controlling the dosage of chemicals according to any one of claims 1-5, characterized in that, The diaphragm (7) is made of rubber, and the outer periphery of the diaphragm (7) is pressed and fixed by the cover plate (2) and the magnetic shielding tube (3).

7. A solenoid valve for controlling the dosage of chemicals according to claim 6, characterized in that, Two core guide rings (52) are provided on the movable core (5).

8. The solenoid valve for controlling the dosage of chemicals according to claim 1, characterized in that, A fixing nut (32) is provided on the top block (31).

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