Electromagnetic proportional valve

Abstract

The utility model relates to the technical field of valves. The electromagnetic proportional valve comprises a valve body, a magnetic attraction piece, a sliding rod, an inflation valve and a power source, the valve body comprises a containing cavity, a channel, an air chamber and a fluid channel, an electromagnet is arranged in the fluid channel, the magnetic attraction piece is arranged in the channel and abuts against the electromagnet, and the inflation valve is arranged on the outer side of the valve body, penetrates through the valve body and extends into the air chamber. The power source is arranged on one side of the valve body and electrically connected to the electromagnet and the magnetic attraction piece, and the sealing part comprises an electromagnetic proportional valve closing state when the power source closing sealing part abuts against the air chamber limiting part and an electromagnetic proportional valve opening state when the power source opening sealing part is located in the air chamber. According to the electromagnetic proportional valve, the movement of the sealing part is controlled through the magnetic force effect between the magnetic attraction piece and the electromagnet and the pressure of the air chamber, and the problem that the performance is affected due to the fact that the spring or the elastic piece is elastically changed due to long-time use is solved.

Description

Technical Field

[0001] This application relates to the technical field of valves, and particularly to an electromagnetic proportional valve. Background Art

[0002] Traditional valve control methods often struggle to meet the requirements of high precision, fast response, and flexible adjustment. For example, manual valve operation is cumbersome and cannot be automatically adjusted according to real-time working conditions. Simple mechanical control valves also have obvious limitations. Although they achieve automatic control to a certain extent, in terms of control precision and response speed, they fall far short of the high standards required in modern industrial production. Such control valves often have difficulty achieving fine and precise adjustment of fluid flow rate, pressure, and direction. When faced with rapidly changing working conditions, the sluggish response speed will lead to a significant reduction in control effects.

[0003] As a key component widely used in the field of industrial automation control, electromagnetic proportional valves should be able to solve the above problems well. However, most of the existing electromagnetic proportional valves have defects in their structural design. They usually use springs or elastic sheets with elastic effects to achieve the reset function. However, after long-term use, the elastic effects of these springs or elastic sheets will inevitably change. This change will directly affect their elastic properties, resulting in hysteresis in the electromagnetic proportional valve during operation. This hysteresis will reduce the control precision of the electromagnetic proportional valve, slow down the response speed, and prevent it from accurately and quickly adjusting according to the input signal, thus seriously affecting the control effect and product quality in industrial production. Summary of the Utility Model

[0004] To address the deficiencies of the prior art, this application discloses an electromagnetic proportional valve that does not require the use of elastic sheets such as springs for reset.

[0005] The utility model discloses an electromagnetic proportional valve, which comprises a valve body, a magnetic attraction member, a sliding rod, an inflation valve and a power source. The valve body includes a hollow accommodation cavity, a passage penetrating the valve body and arranged above the accommodation cavity, an air chamber arranged on one side of the accommodation cavity, and a fluid passage penetrating the valve body and arranged below the accommodation cavity. The lower part of the air chamber encloses inward to form an air chamber limiting portion. An electromagnet is arranged on one side of the fluid passage far away from the accommodation cavity. The magnetic attraction member is arranged in the passage of the valve body. The magnetic attraction member penetrates the accommodation cavity and the fluid passage and abuts against the electromagnet. One end of the sliding rod is provided with a sealing portion, and the other end of the sliding rod far away from the sealing portion is provided with a connecting rod. The sealing portion is arranged in the air chamber and abuts against the air chamber limiting portion. The connecting rod is connected to the electromagnet. The inflation valve is arranged outside the valve body and penetrates the valve body and extends into the air chamber. The power source is arranged on one side of the valve body. The power source includes a power switch capable of controlling the magnitude of the current. The power source is electrically connected to the electromagnet and the magnetic attraction member. Wherein, the sealing portion includes a closed state of the electromagnetic proportional valve when the power-off sealing portion abuts against the air chamber limiting portion and an open state of the electromagnetic proportional valve when the power is on and the sealing portion is located inside the air chamber.

[0006] Further, a limiting portion for restricting the movement of the sealing portion is arranged inside the air chamber.

[0007] Further, a sliding rod protruding portion is formed on one side of the sliding rod and inclines outward. An air chamber clamping groove for limiting the sliding rod protruding portion is formed by inward depression on one side inside the air chamber.

[0008] Further, wear-resistant coatings are arranged on the inner wall of the air chamber and the inner wall of the passage.

[0009] Further, an elastic magnetic attraction protection pad is arranged at one end of the magnetic attraction member close to the electromagnet.

[0010] Further, an elastic buffer pad is arranged on the side of the sealing portion far away from the air chamber, and a sealing pad with a sealing function is arranged on the side of the sealing portion close to the air chamber.

[0011] Further, the electromagnetic proportional valve includes a pressure gauge, and the pressure gauge is arranged outside the valve body and communicated with the air chamber.

[0012] The beneficial effects of the utility model:

[0013] The electromagnetic proportional valve disclosed in this application has significant advantages. Different from most existing electromagnetic proportional valves, it abandons the structural design that relies on springs or elastic sheets to achieve reset. The movement of the sealing part is controlled by the magnetic force between the magnetic attracting part and the electromagnet and the air chamber pressure, so as to realize the on-off and flow regulation of the electromagnetic proportional valve. This design avoids the problem that the elasticity of the spring or elastic sheet changes after long-term use, which affects the performance. During the working process, it can maintain stable control accuracy and response speed, and there will be no hysteresis caused by the performance change of the elastic component. It can be adjusted accurately and quickly according to the input signal, greatly improving the control effect in industrial production and ensuring the stability and reliability of product quality. It effectively solves the problems that may occur in existing electromagnetic proportional valves after long-term use, such as reduced control accuracy and slower response speed, and provides a more accurate and efficient solution for industrial automation control. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of an electromagnetic proportional valve in an embodiment of this application.

[0015] In the figure: electromagnetic proportional valve 100, valve body 11, air chamber limiting part 111, electromagnet 112, limiting part 113, magnetic attracting part 12, magnetic attracting part protruding part 121, magnetic attracting protection pad 122, sliding rod 13, sealing part 131, buffer pad 1311, sealing pad 1312, connecting rod 132, inflation valve 14, power supply 15, power switch 151, pressure gauge 16. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to enable those skilled in the art to better understand the solution of this utility model, the technical solutions in the specific embodiments of this utility model will be clearly and completely described below.

[0017] The present application discloses an electromagnetic proportional valve 100, which includes a valve body 11, a magnetic attracting member 12, a sliding rod 13, an inflation valve 14 and a power source 15. The valve body 11 is the basic framework of the electromagnetic proportional valve 100, and the magnetic attracting member 12, the sliding rod 13, the inflation valve 14 and the power source 15 are arranged inside or on the valve body 11. The valve body 11 includes a hollow accommodation cavity, a passage penetrating through the valve body 11 and arranged above the accommodation cavity, an air chamber arranged on one side of the accommodation cavity, and a fluid passage penetrating through the valve body 11 and arranged below the accommodation cavity. The lower part of the air chamber is enclosed inward to form an air chamber limiting portion 111. An electromagnet is arranged on the side of the fluid passage far from the accommodation cavity. The fluid passage is the fluid flow passage of the electromagnetic proportional valve 100, and the electromagnetic proportional valve 100 controls the fluid flow by controlling the opening and closing of the fluid passage. The magnetic attracting member 12 is arranged in the passage of the valve body 11, and the magnetic attracting member 12 penetrates through the accommodation cavity and the fluid passage and abuts against the electromagnet. One end of the sliding rod 13 is provided with a sealing portion 131, and the other end of the sliding rod 13 far from the sealing portion 131 is provided with a connecting rod 132. The sealing portion 131 is arranged in the air chamber and abuts against the air chamber limiting portion 111, and the connecting rod 132 is connected to the electromagnet. The inflation valve 14 is arranged outside the valve body 11 and penetrates through the valve body 11 and extends into the air chamber. The electromagnetic proportional valve 100 adjusts the pressure of the gas in the air chamber through the inflation valve 14. The power source 15 is arranged on one side of the valve body 11, and the power source 15 includes a power switch 151 capable of controlling the magnitude of the current. The power source 15 is electrically connected to the electromagnet and the magnetic attracting member 12.Among them, the sealing part 131 includes the closed state of the electromagnetic proportional valve 100 when the power supply 15 is turned off and the sealing part 131 abuts against the air chamber limit part 111, and the open state of the electromagnetic proportional valve 100 when the power supply 15 is turned on and the sealing part 131 is located inside the air chamber. When the power supply 15 is turned off, there is no magnetic force on the magnetic attraction part 12 and the electromagnet. At this time, the air chamber is filled with gas to apply pressure to the sealing part 131. At this time, the magnetic attraction part 12 abuts against the fluid passage of the electromagnet electromagnetic proportional valve 100 and is in a closed state. When the electromagnetic proportional valve 100 needs to be opened, the power supply 15 is turned on and the current directions on the magnetic attraction part 12 and the electromagnet are different. The magnetic attraction part 12 and the electromagnet generate a repulsive force. When the repulsive force between the electromagnets is greater than the pressure generated by the gas in the air chamber on the sealing part 131, the magnetic attraction part 12 starts to move in the passage, and at the same time drives the sliding rod 13 and the sealing part 131 to move. The sealing part 131 moves towards the inside of the air chamber. At this time, the fluid passage of the electromagnetic proportional valve 100 is in an open state. The magnetic force on the magnetic attraction part 12 and the electromagnet can be controlled according to the magnitude of the current provided by the power supply 15, so as to control the opening and closing size of the fluid passage of the electromagnetic proportional valve 100. When the electromagnetic proportional valve 100 needs to be closed, only the current of the power supply 15 needs to be reduced or the power supply 15 needs to be turned off, so that the current and magnetic force on the magnetic attraction part 12 and the electromagnet are reduced or disappear. The pressure generated by the gas in the air chamber on the sealing part 131 will drive the sliding rod 13 and the connecting rod 132 to move, thereby driving the magnetic attraction part 12 to abut against the electromagnet. At this time, the fluid passage of the electromagnetic proportional valve 100 is in a closed state. Preferably, in order to prevent the magnetic attraction part 12 from generating a large impact on the electromagnet when directly turning off the power supply 15, which affects the service life of the electromagnetic proportional valve 100, the electromagnetic proportional valve 100 of the present application is closed by gradually reducing the current. The sealing part 131 of the electromagnetic proportional valve 100 of the present application has two states: when the power supply 15 is turned off, the gas in the air chamber exerts pressure, the magnetic attraction part 12 abuts against the electromagnet, and the fluid passage is closed; when the power supply 15 is turned on and the current directions of the magnetic attraction part 12 and the electromagnet are different to generate a repulsive force, and when the repulsive force is greater than the air chamber pressure, the sealing part 131 moves and the fluid passage is opened. The magnetic force between the magnetic attraction part 12 and the electromagnet can be controlled by the magnitude of the current of the power supply 15, so as to control the opening and closing size of the fluid passage. When closing the electromagnetic proportional valve 100, the current is gradually reduced to avoid directly turning off the power supply 15 from causing a large impact on the magnetic attraction part 12 and the electromagnet and affecting the service life. The electromagnetic proportional valve 100 disclosed in the present application has significant advantages. Different from most of the existing electromagnetic proportional valves 100, it abandons the structural design that relies on springs or elastic sheets to achieve reset. The magnetic force between the magnetic attraction part 12 and the electromagnet and the air chamber pressure are used to control the movement of the sealing part 131, so as to realize the opening and closing and flow regulation of the electromagnetic proportional valve 100. This design avoids the problem that the performance is affected due to the elastic change of the spring or elastic sheet caused by long-term use. During the working process, stable control accuracy and response speed can be maintained, and there will be no hysteresis caused by the performance change of the elastic component.It can be adjusted accurately and quickly according to the input signal, greatly improving the control effect in industrial production and ensuring the stability and reliability of product quality. It effectively solves the problems that may occur after the existing electromagnetic proportional valve 100 is used for a long time, such as reduced control accuracy and slower response speed, and provides a more accurate and efficient solution for industrial automation control.

[0018] As an implementation manner, a limiting portion 113 for restricting the movement of the sealing portion 131 is provided inside the air chamber. When the sealing portion 131 moves deeper into the air chamber during movement inside the air chamber, the pressure generated by the gas inside the air chamber is greater, and the force generated by the air chamber for the magnetic attracting member 12 to move forward and return is greater, which affects the return of the magnetic attracting member 12. Moreover, generating a relatively large pressure also has a certain safety hazard and affects the service life of the electromagnetic proportional valve 100. In order to prevent the pressure generated inside the air chamber from being too large, the present application provides the limiting portion 113 for restricting the movement of the sealing portion 131 inside the air chamber.

[0019] As an implementation manner, a magnetic attracting member protrusion 121 is formed on one side of the magnetic attracting member 12 to incline outward, and a passage slot for limiting the magnetic attracting member protrusion 121 is formed by inward depression on one side inside the passage. When the magnetic attracting member 12 moves inside the passage, there will be a certain small space between the magnetic attracting member 12 and the passage to facilitate the movement of the magnetic attracting member 12. When the sealing portion 131 compresses more gas inside the air chamber, the gas pressure inside the air chamber is relatively large. At this time, the generated pressure will cause a certain position shift of the magnetic attracting member 12. The long-term position shift affects the accuracy of the electromagnetic proportional valve 100 and also affects the service life of the electromagnetic proportional valve 100. In order to prevent the magnetic attracting member 12 from generating a position shift inside the passage, the present application forms the magnetic attracting member protrusion 121 on one side of the magnetic attracting member 12 to incline outward, and forms the passage slot for limiting the magnetic attracting member protrusion 121 by inward depression on one side inside the passage, and limits the magnetic attracting member 12 through the cooperation of the magnetic attracting member protrusion 121 and the passage slot.

[0020] As an implementation manner, wear-resistant coatings are provided on the inner wall of the air chamber and the inner wall of the passage. The wear-resistant coatings can reduce wear during the long-term use of the electromagnetic proportional valve 100, ensure the stability of the shapes and sizes of the inner walls of the air chamber and the passage, thereby helping to maintain a good sealing effect, prevent gas or fluid leakage, and ensure the working performance of the electromagnetic proportional valve 100. The wear-resistant coatings can also significantly reduce the frictional wear between components such as the sliding rod 13 and the magnetic attracting member 12 and the inner walls of the air chamber and the passage, extend the service life of the components, and reduce the failures and maintenance costs caused by wear.

[0021] As an implementation manner, an elastic magnetic attraction protection pad 122 is provided on one end of the magnetic attraction member 12 close to the electromagnet. To prevent the sealing portion 131 in the air chamber from directly returning to its original position when the electromagnetic proportional valve 100 is directly de-energized, causing the magnetic attraction member 12 to directly abut and collide with the electromagnet, which may damage the magnetic attraction member 12 or the electromagnet, the provided magnetic attraction protection pad 122 serves as a buffer to reduce the collision of the electromagnet with the magnetic attraction member 12, preventing the electromagnet or the magnetic attraction member 12 from being broken.

[0022] As an implementation manner, an elastic buffer pad 1311 is provided on the side of the sealing portion 131 away from the air chamber, and a sealing pad 1312 with a sealing function is provided on the side of the sealing portion 131 close to the air chamber. The buffer pad 1311 is used to prevent the sealing portion 131 from colliding with the air chamber limiting portion 111 when the sealing portion 131 returns to its original position, which may cause wear of the sealing portion 131 or the air chamber limiting portion 111. The sealing pad 1312 is used to seal the air chamber to prevent gas leakage from affecting the use effect of the electromagnetic proportional valve 100.

[0023] As an implementation manner, the electromagnetic proportional valve 100 includes a pressure gauge 16. The pressure gauge 16 is provided outside the valve body 11 and is connected to the air chamber. The pressure gauge 16 is used to detect the pressure in the air chamber, facilitating the adjustment of the pressure in the air chamber through the inflation valve 14.

[0024] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. An electromagnetic proportional valve, characterized in that: include: The valve body includes a hollow accommodating cavity, a passage penetrating the valve body and arranged above the accommodating cavity, an air chamber arranged on one side of the accommodating cavity, and a fluid passage penetrating the valve body and arranged below the accommodating cavity, the lower part of the air chamber is inwardly enclosed to form an air chamber limiter, and an electromagnet is arranged on one side of the fluid passage away from the accommodating cavity; A magnetic attraction member, which is arranged in the passage of the valve body, and the magnetic attraction member passes through the accommodating cavity and the fluid passage and abuts against the electromagnet; A sliding rod, one end of the sliding rod is provided with a sealing portion, an end of the sliding rod away from the sealing portion is provided with a connecting rod, the sealing portion is arranged in the air chamber and abuts against the air chamber limiting portion, and the connecting rod is connected to the electromagnet; An inflation valve, which is arranged outside the valve body and penetrates the valve body and extends into the air chamber; A power supply, which is arranged on one side of the valve body and includes a power switch capable of controlling the magnitude of the current, and is electrically connected to the electromagnet and the magnetic attraction member; The sealing part includes a closed state of the electromagnetic proportional valve when the power is turned off and the sealing part abuts against the air chamber limit part, and an open state of the electromagnetic proportional valve when the power is turned on and the sealing part is located inside the air chamber.

2. According to the electromagnetic proportional valve described in claim 1, it is characterized in that: A limiting portion for limiting the movement of the sealing portion is arranged inside the air chamber.

3. According to the electromagnetic proportional valve described in claim 1, it is characterized in that: One side of the magnetic attraction piece is tilted outward to form a magnetic attraction piece protrusion, and one side of the interior of the passage is recessed inward to form a passage clamping groove for limiting the magnetic attraction piece protrusion.

4. According to the electromagnetic proportional valve described in claim 1, it is characterized in that: The inner wall of the air chamber and the inner wall of the passage are provided with a wear-resistant coating.

5. The electromagnetic proportional valve according to claim 1, characterized in that: An elastic magnetic protection pad is arranged on one end of the magnetic attraction piece close to the electromagnet.

6. The electromagnetic proportional valve according to claim 1, characterized in that: A buffer pad with elasticity is arranged on the side of the sealing part away from the air chamber, and a sealing pad with sealing function is arranged on the side of the sealing part close to the air chamber.

7. The electromagnetic proportional valve according to claim 1, characterized in that: The electromagnetic proportional valve comprises a pressure gauge, which is arranged outside the valve body and connected to the air chamber.

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