Electromagnetic drive flow adjusting device

Abstract

The utility model relates to the technical field of flow regulation and control, in particular to an electromagnetic drive flow regulation device, which comprises a fluid output piece, an electromagnetic drive component, an electromagnetic drive component, an electromagnetic drive component and an electromagnetic drive component, wherein an inner cavity of the fluid output piece comprises a contraction section and an expansion section sequentially connected from an inlet end to an outlet end; the outlet end of the fluid input part is communicated with the inlet end of the fluid output part; a needle cone is arranged at the end of the adjusting rod, the adjusting rod is slidably installed in the fluid input piece, the needle cone faces the fluid output piece, a magnetic piece is arranged at the end, away from the needle cone, of the adjusting rod, a reset elastic piece is installed between the magnetic piece and the fluid input piece, and the magnetic piece is sleeved with an electrified coil. In the process of adjusting the flow, the flow can be adjusted by changing the current of the electrified coil, driving mechanisms such as a motor lead screw or an electric air cylinder penetrating out of the shell do not need to be arranged, the electromagnetic driving flow adjusting device can be integrally and directly sealed, the sealing structure is simple, and the sealing effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of flow regulation and control, in particular to an electromagnetically driven flow regulation device. Background Art

[0002] The cavitation venturi is a structure that contracts first and then expands. When the inlet pressure and outlet pressure of the cavitation venturi differ to a certain extent, the liquid cavitation occurs in the throat and the liquid flow is blocked. When the cavitation venturi is in a cavitation congestion state, the flow rate only depends on the upstream pressure and the throat flow area, and will not be affected by the downstream pressure.

[0003] The sonic nozzle is also a structure that first contracts and then expands. When the gas passes through the contraction section of the sonic nozzle, the speed increases and reaches the speed of sound at the throat of the sonic nozzle, causing throttling and leading to flow congestion. At this time, the gas flow rate only depends on the flow area of ​​the throat.

[0004] Both the adjustable cavitation venturi and the adjustable sonic nozzle are composed of a movable cone or a needle cone with a specific profile installed in the center of the throat on the basis of the original device. In the prior art, both the adjustable cavitation venturi and the adjustable sonic nozzle use a motor screw or an electric cylinder to drive the needle cone to move. The needle cone needs to pass through the housing to connect with the motor screw or the electric cylinder. The part where the needle cone passes through the housing needs to be sealed to prevent liquid leakage. At the same time, the needle cone needs to move, so this part usually needs to use a dynamic sealing structure such as a spring energy storage ring, which has a complex sealing structure and a poor sealing effect. Utility Model Content

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the defects of the cavitation venturi seal in the prior art, such as the complex seal structure and the poor sealing effect, thereby providing an electromagnetically driven flow regulating device.

[0006] In order to solve the above technical problems, the utility model provides an electromagnetically driven flow regulating device, comprising:

[0007] The fluid output member has an inner cavity including a contraction section and an expansion section connected in sequence from the inlet end to the outlet end, and an end of the contraction section with a smaller inner diameter is connected to an end of the expansion section with a smaller inner diameter;

[0008] A fluid input member, whose outlet end is connected to the inlet end of the fluid output member, the fluid input member and the fluid output member are arranged in the same direction, and a fluid inlet pipe is connected to the side wall of the fluid input member;

[0009] An adjusting rod is provided with a needle cone at its end. The adjusting rod is slidably installed in the fluid input component, and the needle cone is arranged toward the fluid output component. A magnetic component is provided at the end of the adjusting rod away from the needle cone. A reset elastic component is installed between the magnetic component and the fluid input component, and an energized coil is installed on the magnetic component.

[0010] Optionally, a plurality of guide members are installed at intervals in the fluid input member, and the adjustment rod is slidably installed on the guide members.

[0011] Optionally, the axis of the adjusting rod coincides with the axis of the fluid output member.

[0012] Optionally, both connection terminals of the energized coil penetrate the side wall of the fluid input member, and the connection terminals are sealed with the fluid input member.

[0013] Optionally, the fluid input component includes an adjusting section and an input section, the magnetic component is arranged at the adjusting section, the needle cone is arranged at the input section, and the fluid inlet pipe is connected to the input section.

[0014] Optionally, the regulating section includes a regulating tube and a packaging blind plate, the packaging blind plate is sealed and connected to one end of the regulating tube, and the other end of the regulating tube is sealed and connected to the input section.

[0015] Optionally, one end of the resetting elastic member abuts against the adjusting rod, and the other end abuts against the packaging blind plate.

[0016] Optionally, the input section includes a pair of sealing flanges and an input pipe, the sealing flanges are respectively connected to both ends of the input pipe, and the fluid output member and the regulating section are respectively sealed with the sealing flanges at both ends of the input pipe.

[0017] Optionally, the inner diameter of the fluid input member is not smaller than the inner diameter of the inlet end of the fluid output member.

[0018] Optionally, both the contraction section and the expansion section have a conical and uniform transition, and the length of the contraction section is smaller than the length of the expansion section.

[0019] The technical solution of the utility model has the following advantages:

[0020] 1. The electromagnetically driven flow regulating device provided by the utility model comprises: a fluid output member, whose inner cavity comprises a contraction section and an expansion section connected in sequence from the inlet end to the outlet end, and the end of the contraction section with a smaller inner diameter is connected to the end of the expansion section with a smaller inner diameter; a fluid input member, whose outlet end is connected to the inlet end of the fluid output member, the fluid input member and the fluid output member are arranged in the same direction, and a fluid inlet pipe is connected to the side wall of the fluid input member; an adjusting rod, whose end is provided with a needle cone, the adjusting rod is slidably installed in the fluid input member, the needle cone is arranged toward the fluid output member, a magnetic member is provided at one end of the adjusting rod away from the needle cone, a reset elastic member is installed between the magnetic member and the fluid input member, and an energized coil is sleeved and installed on the magnetic member.

[0021] The electromagnetically driven flow regulating device is provided with a needle cone at one end of the regulating rod and a magnetic part connected to the other end, and the magnetic part is placed in the energized coil. When the energized coil is powered on, a magnetic field is generated, which interacts with the magnetic field generated by the magnetic part itself, driving the regulating rod to drive the needle cone to move axially, and at the same time, the reset spring is deformed to generate elastic force. When the needle cone moves to a certain position, the elastic force of the reset elastic part is balanced with the magnetic force generated by the interaction between the energized coil and the magnetic part, so that the needle cone is positioned and stops moving at this position. When the flow is adjusted, the relative position of the needle cone and the inlet end of the fluid output part is changed by adjusting the current in the energized coil, thereby achieving flow regulation. In the process of adjusting the flow, it can be achieved by changing the current of the energized coil, without the need to set a driving mechanism such as a motor screw or an electric cylinder passing through the shell. The electromagnetically driven flow regulating device can be directly sealed as a whole, with a simple sealing structure and better sealing effect.

[0022] 2. In the electromagnetically driven flow regulating device provided by the utility model, a plurality of guide members are installed at intervals in the fluid input member, and the regulating rod is slidably installed on the guide members. By providing the guide members, the sliding of the regulating rod is guided to ensure that the regulating rod can remain aligned with the fluid output member after multiple sliding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the internal structure of the electromagnetically driven flow regulating device provided in an embodiment of the utility model.

[0025] Figure 2 It is a schematic structural diagram of the electromagnetic driven flow regulating device provided in the embodiment of the utility model.

[0026] Explanation of the accompanying drawings: 1. fluid output part; 2. fluid input part; 3. adjusting rod; 4. fluid inlet pipe; 5. contraction section; 6. expansion section; 7. needle cone; 8. magnetic part; 9. reset elastic part; 10. energized coil; 11. guide part; 12. terminal; 13. adjusting section; 14. input section; 15. adjusting tube; 16. packaging blind plate; 17. input tube; 18. sealing flange; 19. matching flange. DETAILED DESCRIPTION

[0027] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Figure 1 and Figure 2 The electromagnetically driven flow regulating device provided in this embodiment is shown, which can be used for flow regulation of liquid delivery system as a cavitation venturi, and can also be used for flow regulation of gas delivery system as a sonic nozzle. The electromagnetically driven flow regulating device includes a fluid input part 2, a fluid output part 1 and a regulating rod 3 for regulating fluid flow.

[0032] The inner cavity of the fluid output member 1 includes a contraction section 5 and an expansion section 6 connected in sequence from the inlet end to the outlet end, and the end of the contraction section 5 with a smaller inner diameter is connected to the end of the expansion section 6 with a smaller inner diameter. The outlet end of the fluid input member 2 is connected to the inlet end of the fluid output member 1, and the fluid input member 2 and the fluid output member 1 are arranged in the same direction, and the side wall of the fluid input member 2 is connected to the fluid inlet pipe 4. A conical needle cone 7 is arranged at the end of the adjustment rod 3, and the adjustment rod 3 is slidably installed in the fluid input member 2, and the needle cone 7 is arranged toward the fluid output member 1. In this embodiment, in order to enable the needle cone 7 to completely close the contraction section 5, the maximum diameter of the needle cone 7 is not less than the minimum inner diameter of the contraction section 5. A permanent magnet as a magnetic member 8 is arranged at the end of the adjustment rod 3 away from the needle cone 7, and a reset elastic member 9 is installed between the magnetic member 8 and the fluid input member 2, and an energized coil 10 is installed on the magnetic member 8. In some other embodiments, the reset elastic member 9 can also be selected from other elastic members such as elastic rubber pads.

[0033] A plurality of guide plates 11 are installed in the inner cavity of the fluid input member 2 at intervals, a guide hole is provided in the middle of the guide plate, and the adjustment rod 3 is slidably installed in the guide hole of the guide plate. The axis of the adjustment rod 3 coincides with the axis of the fluid output member 1.

[0034] In order to facilitate the power supply to the power coil 10 and control the magnitude and direction of the current on the power coil 10, the two terminals 12 of the power coil 10 penetrate the side wall of the fluid input member 2 and extend outside the fluid input member 2, and the terminals 12 and the fluid input member 2 are sealed by welding. In some other embodiments, the terminals 12 are sealed with the pipe body by means of threaded connection or the like. When the electromagnetically driven flow regulating device is working, the current on the power coil 10 is adjusted by connecting the two terminals 12 to the control circuit.

[0035] In this embodiment, the fluid input member 2 includes an adjustment section 13 and an input section 14, the magnetic member 8 is arranged on the adjustment section 13, the needle cone 7 is arranged on the input section 14, and the fluid inlet pipe 4 is connected to the input section 14, and is combined with the input section 14 to form a three-way structure. Specifically, the adjustment section 13 includes an adjustment tube 15 and a packaging blind plate 16, the packaging blind plate 16 is sealed and connected to one end of the adjustment tube 15, and the other end of the adjustment tube 15 is sealed and connected to the input section 14. One end of the reset spring as the reset elastic member 9 abuts against the adjustment rod 3, and the other end abuts against the packaging blind plate 16. The packaging blind plate 16 is connected to the adjustment tube 15 in a static sealing manner. The input section 14 includes a pair of sealing flanges 18 and an input tube 17, and the sealing flanges 18 are respectively connected to the two ends of the input tube 17. The fluid output member 1 and the adjustment section 13 are both connected with matching flanges 19, and the fluid output member 1 and the adjustment section 13 are respectively connected to the sealing flanges 18 at the two ends of the input tube 17 through the matching flanges 19.

[0036] The inner diameter of the fluid input member 2 is not less than the inner diameter of the inlet end of the fluid output member 1. This increases the pressure of the fluid when it enters the fluid output member 1 from the fluid input member 2. The contraction section 5 and the expansion section 6 are both tapered and evenly transitioned, so that the pressure of the fluid in the fluid output pipe changes evenly. In order to improve the stability of the fit between the needle cone 7 and the contraction section 5 at the minimum inner diameter, the length of the contraction section 5 is less than the length of the expansion section 6.

[0037] In the electromagnetic driven flow regulating device provided in this embodiment, the two ends of the permanent magnet as the magnetic member 8 are respectively connected to the regulating rod 3 and the reset spring as the reset elastic member 9. The magnetic member 8 is placed in the energized coil 10. After the energized coil 10 is energized, a magnetic field is generated, which generates a magnetic force on the magnetic member 8, thereby driving the regulating rod 3 to drive the needle cone 7 to move. At the same time, the reset elastic member 9 generates an elastic force. When the needle cone 7 moves to a certain position, the elastic force of the reset elastic member 9 is balanced with the magnetic force applied by the energized coil 10 to the magnetic member 8, and then the needle cone 7 stops moving, achieving the purpose of using electromagnetic force to drive the needle cone 7 to move. When the flow is adjusted, the position of the needle cone 7 is changed by changing the current in the energized coil 10, and then the flow area at the outlet end of the contraction section 5 in the fluid output member 1 is changed, thereby achieving fluid flow adjustment.

[0038] As an alternative embodiment, the end face of the needle cone 7 is conical, hemispherical, parabolic, ellipsoidal or any other shape, each shape corresponds to a flow rate adjustment curve, and the shape of the needle cone end face can be selected according to actual application requirements.

[0039] As an alternative implementation, the guide member is a straight-line, cross-shaped or other shaped guide frame, and a guide hole is reserved in the middle of the guide frame for the adjustment rod to pass through and guide the adjustment rod.

[0040] As an alternative embodiment, the maximum inner diameter of the needle cone 7 may also be smaller than the minimum inner diameter of the contraction section 5, so that the minimum value of the flow rate of the fluid adjusted by the needle cone 7 and the contraction section 5 is not zero.

[0041] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An electromagnetically driven flow regulating device, characterized in that: include: A fluid output member (1), wherein the inner cavity of the fluid output member (1) comprises a contraction section (5) and an expansion section (6) connected in sequence from the inlet end to the outlet end, wherein the end of the contraction section (5) with a smaller inner diameter is connected to the end of the expansion section (6) with a smaller inner diameter; A fluid input member (2), the outlet end of which is connected to the inlet end of the fluid output member (1), the fluid input member (2) and the fluid output member (1) are arranged in the same direction, and the side wall of the fluid input member (2) is connected to a fluid inlet pipe (4); An adjusting rod (3) is provided with a needle cone (7) at its end. The adjusting rod (3) is slidably mounted in the fluid input member (2). The needle cone (7) is arranged toward the fluid output member (1). A magnetic member (8) is provided at one end of the adjusting rod (3) away from the needle cone (7). A reset elastic member (9) is installed between the magnetic member (8) and the fluid input member (2). An energized coil (10) is sleeved and mounted on the magnetic member (8).

2. The electromagnetic driven flow regulating device according to claim 1, characterized in that: A plurality of guide members (11) are installed at intervals in the fluid input member (2), and the adjustment rod (3) is slidably installed on the guide members (11).

3. The electromagnetic driven flow regulating device according to claim 2, characterized in that: The axis of the adjusting rod (3) coincides with the axis of the fluid output member (1).

4. The electromagnetic driven flow regulating device according to any one of claims 1 to 3, characterized in that: Both connection terminals (12) of the energized coil (10) penetrate the side wall of the fluid input member (2), and the connection terminals (12) are sealed with the fluid input member (2).

5. The electromagnetic driven flow regulating device according to any one of claims 1 to 3, characterized in that: The fluid input component (2) comprises an adjusting section (13) and an input section (14), the magnetic component (8) is arranged on the adjusting section (13), the needle cone (7) is arranged on the input section (14), and the fluid inlet pipe (4) is connected to the input section (14).

6. The electromagnetic driven flow regulating device according to claim 5, characterized in that: The regulating section (13) comprises a regulating tube (15) and a packaging blind plate (16); the packaging blind plate (16) is sealedly connected to one end of the regulating tube (15); and the other end of the regulating tube (15) is sealedly connected to the input section (14).

7. The electromagnetic driven flow regulating device according to claim 6, characterized in that: One end of the resetting elastic member (9) abuts against the adjusting rod (3), and the other end abuts against the packaging blind plate (16).

8. The electromagnetic driven flow regulating device according to claim 5, characterized in that: The input section (14) comprises a pair of sealing flanges (18) and an input pipe (17), wherein the sealing flanges (18) are respectively connected to both ends of the input pipe (17), and the fluid output member (1) and the regulating section (13) are respectively sealed with the sealing flanges (18) at both ends of the input pipe (17).

9. The electromagnetic driven flow regulating device according to any one of claims 1 to 3, characterized in that: The inner diameter of the fluid input member (2) is not smaller than the inner diameter of the inlet end of the fluid output member (1).

10. The electromagnetic driven flow regulating device according to any one of claims 1 to 3, characterized in that: The contraction section (5) and the expansion section (6) both have a conical and uniform transition.

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