Electromagnetic valve capable of feeding back opening and closing signals

Abstract

The utility model discloses an electromagnetic valve capable of feeding back opening and closing signals. The electromagnetic valve comprises a static iron core, an electromagnetic coil, a movable iron core, an electromagnetic valve link sleeve and a valve body. The electromagnetic valve chaining sleeve is installed on the top of the valve body, the movable iron core is installed on the top of the electromagnetic valve chaining sleeve, the electromagnetic coil is connected to the movable iron core in a sleeving mode and located on the top of the electromagnetic valve chaining sleeve, the static iron core is installed in the electromagnetic coil, the locking nut is installed between the static iron core and the electromagnetic coil, and the static iron core is located above the movable iron core. A spring is installed at the top end in the movable iron core, and a pressure sensor is installed at the bottom end in the static iron core and located above the spring. According to the device, the pressure sensor is in direct contact with the electromagnetic valve spring, so that the position feedback response rate reaches the millisecond level, the problems of misjudgment and the like caused by interference are avoided, a basis for position judgment is provided for the proportioning valve with higher control requirements, and the adjusting precision is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to solenoid valve technical field, specifically is a kind of solenoid valve of opening and closing signal feedback. BACKGROUND

[0002] The position feedback function of solenoid valve is that non-contact Hall sensor is used to judge the position of electromagnet core by detecting the change of magnetic field in electromagnetic driving device.

[0003] The existing solenoid valve has the following defects:

[0004] The existing solenoid valve can only detect whether electromagnetic induction is established after the energization of solenoid coil through the change of magnetic field, but cannot judge whether electromagnet core is attracted through the change of magnetic field. (Due to the heating of solenoid coil itself or the current change of power supply, the magnetic field strength will change even if electromagnet core does not act.) For solenoid valve with very small stroke (stroke < 1mm), the detection accuracy of traditional Hall sensor cannot be covered, so the position of electromagnet core below 1mm cannot be detected, and the detection circuit will appear data confusion once receiving external electromagnetic interference (EMC problem), which will cause false detection results and damage the whole control strategy.

[0005] Therefore, a solution is needed. CONTENT OF UTILITY MODEL

[0006] (I) Technical problem solved

[0007] In view of the deficiencies of prior art, the utility model provides a kind of solenoid valve of opening and closing signal feedback to solve the problems raised in the above background art.

[0008] (II) Technical scheme

[0009] To achieve the above purpose, the utility model is realized by the following technical scheme: a kind of solenoid valve of opening and closing signal feedback, including static core, solenoid coil, moving iron core, solenoid valve linking sleeve and valve body;The solenoid valve linking sleeve is installed at the top of valve body, the moving iron core is installed at the top of solenoid valve linking sleeve, the solenoid coil sleeve is connected on moving iron core, and located at the top of solenoid valve linking sleeve, the static core is installed in solenoid coil, locking nut is installed between static core and solenoid coil, the static core is located above moving iron core, spring is installed at the top end in moving iron core, pressure sensor is installed at the bottom end in static core, the pressure sensor is located above spring, pressure sensor lead is provided at the connection end of pressure sensor, and the pressure sensor is connected with solenoid coil connection end through pressure sensor lead.

[0010] Preferably, the static iron core is externally provided with a sealing installation groove, and a static iron core sealing ring is installed in the sealing installation groove and has a circular ring structure.

[0011] Preferably, the electromagnetic valve linking sleeve has a funnel structure, and the electromagnetic valve linking sleeve is externally provided with a sealing ring groove, and a sleeve rod radial sealing ring is installed in the sealing ring groove.

[0012] Preferably, the moving iron core bottom is provided with a moving iron core sealing gasket, the moving iron core sealing gasket has a circular structure, and the moving iron core sealing gasket is made of rubber.

[0013] (Three) beneficial effects

[0014] The utility model provides a kind of electromagnetic valve of opening and closing signal feedback.It has the following beneficial effects:

[0015] In the scheme, a kind of electromagnetic valve of opening and closing signal feedback directly contacts electromagnetic valve spring by pressure sensor, so that position feedback response rate reaches millisecond level, and there is no misjudgment problem due to interference, provides a position determination basis for the proportional regulating valve (the opening degree of valve is adjusted by moving iron core position) of higher control requirement, greatly improves the regulating accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the schematic diagram of the structure of the utility model as a whole.

[0017] In the drawing, 1, static iron core;2, pressure sensor lead;3, locking nut;4, electromagnetic coil;5, pressure sensor;6, static iron core sealing ring;7, spring;8, sleeve rod radial sealing ring;9, moving iron core;10, electromagnetic valve linking sleeve;11, valve body;12, moving iron core sealing gasket;13, sealing installation groove;14, sealing ring groove. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0019] Please refer to Figure 1 The utility model embodiment provides a kind of technical scheme:

[0020] Embodiment 1

[0021] In view of the above problems to be solved: the existing electromagnetic valve can only detect whether the electromagnetic induction is established after the electromagnetic coil is energized through the change of the magnetic field, but cannot judge whether the electromagnetic core is attracted through the change of the magnetic field. (Due to the heating of the electromagnetic coil itself or the current change of the power supply, the magnetic field strength will change even if the electromagnetic core does not act). For the electromagnetic valve with very small stroke (stroke < 1mm), the detection accuracy of the traditional Hall sensor cannot cover, so the position of the electromagnetic core below 1mm cannot be detected, and the detection circuit will appear data confusion once receiving external electromagnetic interference (EMC problem), which will cause the detection result to be false, thereby destroying the whole control strategy.

[0022] The solution is as follows: an electromagnetic valve with opening and closing signal feedback, comprising a static core 1, an electromagnetic coil 4, a moving core 9, an electromagnetic valve linking sleeve 10 and a valve body 11; the electromagnetic valve linking sleeve 10 is installed at the top of the valve body 11, the moving core 9 is installed at the top of the electromagnetic valve linking sleeve 10, the electromagnetic coil 4 is sleeved on the moving core 9 and located at the top of the electromagnetic valve linking sleeve 10, the static core 1 is installed inside the electromagnetic coil 4, a locking nut 3 is installed between the static core 1 and the electromagnetic coil 4, the static core 1 is located above the moving core 9, a spring 7 is installed at the top of the inside of the moving core 9, a pressure sensor 5 is installed at the bottom of the inside of the static core 1, the pressure sensor 5 is located above the spring 7, a pressure sensor lead 2 is provided at the connection end of the pressure sensor 5, the pressure sensor 5 is connected with the connection end of the electromagnetic coil 4 through the pressure sensor lead 2, the position feedback response rate reaches millisecond level by directly contacting the electromagnetic valve spring 7 through the pressure sensor 5, and there is no false judgment problem caused by interference, which provides a basis for position judgment for the proportional regulating valve with higher control requirement (the opening degree of the valve is adjusted through the position of the moving core), and greatly improves the adjustment accuracy.

[0023] A sealing installation groove 13 is formed on the outside of the static core 1, and a static core sealing ring 6 is installed in the sealing installation groove 13. The static core sealing ring 6 is in a circular ring structure, and is used for sealing purpose.

[0024] The electromagnetic valve linking sleeve 10 is in a funnel-shaped structure, a sealing ring groove 14 is formed on the outside of the electromagnetic valve linking sleeve 10, and a sleeve rod radial sealing ring 8 is installed in the sealing ring groove 14. The sleeve rod radial sealing ring 8 is used for sealing between the electromagnetic valve linking sleeve 10 and the valve body 11, preventing leakage between them, and improving the sealing performance.

[0025] The bottom of the moving iron core 9 is provided with a moving iron core sealing gasket 12, which is in a circular shape and made of rubber.

[0026] Working principle: when working, when the electromagnetic valve is not powered, the spring 7 is in a pre-tightening state, forming an initial pressure on the pressure sensor 5, and the pressure value is the feedback signal of the electromagnetic valve in the initial position. When the electromagnetic coil 4 is powered, the moving iron core 9 and the static iron core 1 are attracted due to electromagnetic induction, so that the spring 7 is compressed, the elastic force is increased, and the pressure borne by the pressure sensor 5 is increased. The pressure value is transmitted to the outside through the pressure sensor lead 2. At this time, the external controller receives the pressure signal change, and it can be judged that the electromagnetic valve is in the open position. The input voltage of the electromagnetic valve is generally 12V or 24V, and the input voltage of the pressure sensor 5 is 5V, 12V or 24V. The signal of the pressure sensor 5 is led out through the PIN pin, and the analog signal of the pressure sensor 5 is converted into an actual pressure value through a conversion formula.

[0027] The utility model discloses 1, static iron core;2, pressure sensor lead;3, locking nut;4, electromagnetic coil;5, pressure sensor;6, static iron core sealing ring;7, spring;8, cover rod radial sealing ring;9, moving iron core;10, electromagnetic valve link cover;11, valve body;12, moving iron core sealing gasket;13, sealing installation groove;14, sealing ring groove, all parts are general standard parts or parts known to those skilled in the art, and the structure and principle thereof can be known by technical personnel through a technical manual or through a conventional experimental method. The utility model solves the problem that the existing electromagnetic valve can only detect whether electromagnetic induction is established after the electromagnetic coil is powered on through the change of the magnetic field, but cannot judge whether the electromagnetic core is attracted through the change of the magnetic field. (Due to the heating of the electromagnetic coil itself or the current change of the power supply, the magnetic field strength will change even if the electromagnetic core does not act. For the electromagnetic valve with very small stroke (stroke < 1mm), the detection accuracy of the traditional Hall sensor cannot be covered, so the position of the electromagnetic core below 1mm cannot be detected. Once the detection circuit receives external electromagnetic interference (EMC problem), data confusion will occur, which will cause false detection results and damage the whole control strategy. The utility model can directly contact the electromagnetic valve spring through the pressure sensor through the mutual combination of the above-mentioned parts, so that the position feedback response rate reaches the millisecond level, and false judgment caused by interference does not occur. For the proportional control valve with higher control requirements (the opening degree of the valve is adjusted through the position of the moving iron core), a position judgment basis is provided, and the adjustment accuracy is greatly improved.

[0028] The basic principle and main features of the present application and the advantages of the present application are shown and described above, for those skilled in the art, obviously the present application is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

[0029] In addition, it should be understood that, although the present application is described in the form of embodiments, not every embodiment contains only one independent technical solution, the description of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, the technical solutions in each embodiment can also be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. An electromagnetic valve of on-off signal feedback, characterized by: It includes static core (1), electromagnetic coil (4), moving core (9), electromagnetic valve link sleeve (10) and valve body (11); The electromagnetic valve link sleeve (10) is installed on the top of the valve body (11), the moving core (9) is installed on the top of the electromagnetic valve link sleeve (10), the electromagnetic coil (4) is sleeved on the moving core (9) and located on the top of the electromagnetic valve link sleeve (10), the static core (1) is installed inside the electromagnetic coil (4), the locking nut (3) is installed between the static core (1) and the electromagnetic coil (4), the static core (1) is located above the moving core (9), the spring (7) is installed at the top of the moving core (9), the pressure sensor (5) is installed at the bottom of the static core (1), the pressure sensor (5) is located above the spring (7), the pressure sensor (5) is provided with pressure sensor lead wire (2) at the connecting end, the pressure sensor (5) is connected with the connecting end of the electromagnetic coil (4) through the pressure sensor lead wire (2).

2. The solenoid valve according to claim 1, wherein: The static core (1) is provided with a sealing installation groove (13) outside, the static core sealing ring (6) is installed in the sealing installation groove (13), and the static core sealing ring (6) is in a circular ring structure.

3. The solenoid valve with opening / closing signal feedback according to claim 1, characterized in that: The electromagnetic valve link sleeve (10) is in a funnel structure, the sealing ring groove (14) is formed outside the electromagnetic valve link sleeve (10), and the sleeve rod radial sealing ring (8) is installed in the sealing ring groove (14).

4. The solenoid valve of claim 1, wherein: The moving core (9) is provided with a moving core sealing gasket (12) at the bottom, the moving core sealing gasket (12) is in a circular structure, and the moving core sealing gasket (12) is made of rubber material.

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