Gas electromagnetic valve with switching signal feedback

Abstract

The utility model discloses a gas electromagnetic valve with a switching signal feedback function, which solves the problems that the prior art does not have the switching feedback function, the gas flow is influenced by erroneous judgment of operators, or the application environment is limited and the structure is complicated, and comprises an electromagnetic valve body and a switching signal feedback device positioned at the bottom of the electromagnetic valve body, the switch signal feedback device comprises a shell, a first signal line, a second signal line, a conductive reed and a feedback spring, a containing cavity is formed in the top of the shell, one ends of the two signal lines are located in the containing cavity, the second ends of the two signal lines penetrate out of the shell and are connected with the remote controller, one end of the conductive reed is connected with the first end of the second signal line, and the other end of the conductive reed is connected with the feedback spring. The free end of the feedback spring is located above the first signal line, one end of the feedback spring is connected with a valve element of the electromagnetic valve body, the other end of the feedback spring is located above the conductive reed, the feedback spring presses the free end of the conductive reed under the pressure provided by the valve element, the conductive reed is communicated with the first signal line, and a signal feedback loop is formed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of electromagnetic valves, specifically to a kind of gas electromagnetic valve with switch signal feedback. BACKGROUND

[0002] In industrial automation production process, the application of electromagnetic valve is very extensive, electromagnetic valve is mainly used in industrial control system to adjust the flow direction, flow rate etc. of gas in pipeline. It mainly relies on the change of electromagnetic coil magnetic force to drive the movement of iron core, to realize the switch of valve. Since electromagnetic valve can realize remote control, without manual operation on site, it is widely used in current social production and scientific research field.

[0003] The electromagnetic valve in prior art all adopts electromagnetic coil power-on state feedback mode to monitor the switch of electromagnetic valve. When electromagnetic valve appears coil overheating, short circuit or valve core jamming phenomenon, even if power is supplied to electromagnetic coil, valve core still cannot act, cannot complete the function of valve opening or closing. This leads to that after opening or closing, operator cannot know the real switch state of electromagnetic valve, although electromagnetic coil power-on state feedback result is normal, but actually electromagnetic valve has not opened or closed. Gas cannot be effectively controlled according to operator's intention, system will lose control due to operator's misjudgment, causing industrial accident and great economic loss. At the same time, it also brings great workload to fault troubleshooting.

[0004] At present, some electromagnetic valves are also equipped with signal feedback function. For example, Chinese utility model patent CN102080737A discloses a pilot operated electromagnetic valve with valve position feedback signal, which comprises a pilot valve, an electromagnetic valve coil and a main valve. The pilot valve is composed of a sheath and a valve core arranged in the sheath and capable of sliding under the electromagnetic force of the coil. The inner cavity of the main valve body is provided with a main valve closing member capable of sliding along the inner wall thereof. The cavities of the pilot valve and the main valve are communicated. A first contact switch for indicating the valve position state of the main valve and a second contact switch for indicating the valve position state of the pilot valve are arranged. The first contact switch is located between the upper top surface of the inner cavity of the main valve and the upper end surface of the main valve closing member. The second contact switch is located between the upper top surface of the inner cavity of the sheath and the upper end surface of the valve core. The opening and closing state of the electromagnetic valve can be reliably and quickly indicated. However, its structure is complex, and the first contact switch and the second contact switch need to be installed during the production of the electromagnetic valve. In a relatively complex gas environment, such as high temperature and strong electromagnetic interference, the contact sensor may fail, affecting the normal use of the device. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the technical problems that in prior art, since electromagnetic valve does not have switch feedback function, operator misjudgment is caused, gas flow control is affected, and the application environment of existing electromagnetic valve with switch feedback function is limited, the structure is complex, and the production cost is high, and provides a kind of gas electromagnetic valve with switch signal feedback.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme:

[0007] A gas electromagnetic valve with switch signal feedback, its speciality lies in: including: electromagnetic valve body and the switch signal feedback device in the bottom of electromagnetic valve body,

[0008] The switch signal feedback device includes a shell, a first signal line, a second signal line, a conductive reed and a feedback spring.

[0009] The top of the shell is connected with the bottom of the electromagnetic valve body, and a receiving cavity is arranged in the middle of the top of the shell.

[0010] The first ends of the first signal line and the second signal line are located in the receiving cavity, and the second ends of the two are penetrated through the shell and connected with a remote controller.

[0011] One end of the conductive reed is connected with the first end of the second signal line, and the free end thereof is located above the first end of the first signal line and corresponds to the first end of the first signal line.

[0012] One end of the feedback spring is connected with the valve core of the electromagnetic valve body, and the other end thereof is located above the conductive reed, so that the feedback spring presses the free end of the conductive reed under the pressure provided by the valve core, is communicated with the first end of the first signal line, and a signal feedback loop is formed.

[0013] The switch signal feedback device is detachably arranged at the bottom of the electromagnetic valve body, which not only reduces the manufacturing cost, but also can be directly applied to the modification of the existing electromagnetic valve. By using the up-down movement of the valve core in the switch process of the electromagnetic valve, the feedback spring is driven by the valve core, the feedback spring presses or moves away from the conductive reed, and then the free end of the conductive reed is abutted or separated from the first end of the first signal line, the signal feedback loop is formed or disconnected between the first signal line and the second signal line, the signal is transmitted to the remote controller, and then the actual switch state of the valve is indicated. The whole structure is simple, reliable in performance and low in manufacturing cost, compared with the traditional sensing device, the design of the spring and the conductive reed is not easy to be limited by the environment, and is suitable for a wide range of working environments.

[0014] Further, the electromagnetic valve body includes a valve body, a hollow structure valve cover, a dynamic spring, an electromagnetic coil and the valve core.

[0015] The bottom of the valve body is connected with the top of the shell, and the valve body and the valve cover jointly form a valve core movement space.

[0016] The valve core is located in the valve core movement space and can move up and down along the axial direction thereof, and a blind hole is arranged at the top of the valve core.

[0017] The moving spring is located in the blind hole, and the moving spring abuts against the inside of the top wall of the valve cover out of the blind hole;

[0018] The electromagnetic coil is wound on the outer periphery of the valve cover.

[0019] Further, the valve body and the valve cover are connected through bolts.

[0020] Further, the top of the shell has an annular groove, and an O-shaped sealing ring is arranged in the annular groove. The sealing performance between the shell and the valve body is improved by arranging the sealing ring, so that the gas in the pipeline and the external substances are prevented from polluting each other.

[0021] Further, the O-shaped sealing ring is made of rubber.

[0022] Further, the top of the shell and the bottom of the valve body are connected through bolts.

[0023] Further, the conductive reed has an insulating layer on the side close to the feedback spring. The insulating layer is arranged to prevent the conductive reed from being in conductive communication with the feedback spring, so as to prevent the operator from misjudging. Alternatively, an insulating spring can be used to ensure that the signal feedback loop is formed only when the conductive reed is in contact with the second signal line.

[0024] Further, the insulating layer is made of polytetrafluoroethylene. The polytetrafluoroethylene has higher stability.

[0025] Compared with the prior art, the gas electromagnetic valve with switch signal feedback has the following advantages:

[0026] 1. The switch signal feedback device is detachably arranged at the bottom of the electromagnetic valve body, so that the manufacturing cost is reduced, and the device can be directly applied to the modification of the existing electromagnetic valve.

[0027] 2. The valve core moves up and down during the opening and closing of the electromagnetic valve, the feedback spring is driven by the valve core, the feedback spring presses or moves away from the conductive reed, and then the free end of the conductive reed abuts against or is separated from the first end of the first signal line, so that the signal feedback loop is formed or disconnected between the first signal line and the second signal line, the signal is transmitted to the remote controller, and then the actual opening and closing state of the valve is indicated.

[0028] 3. The utility model has the advantages of simple structure, reliable performance, low cost, and is not easy to be limited by many environments, and is suitable for a wide range of working environments.

[0029] 4. The utility model directly feeds back the opening and closing result of the electromagnetic valve through the signal, and significantly improves the reliability of the control system. BRIEF DESCRIPTION OF DRAWINGS

[0030] Fig. 1 is a structure schematic view of a gas electromagnetic valve embodiment with switch signal feedback of the utility model;

[0031] Fig. 2 is a switch signal feedback device sectional view of a gas electromagnetic valve embodiment with switch signal feedback of the utility model.

[0032] Reference signs:

[0033] 1, valve body;2, electromagnetic coil;3, dynamic spring;4, valve core;5, valve cover;6, feedback spring;7, first signal line;8, conductive reed;9, shell;10, second signal line. Specific implementation

[0034] In order to make the purpose, technical scheme and advantage of the utility model more clear, the technical scheme of the utility model will be described clearly and completely below by combining with the drawings and examples, obviously, the described example is only a part of the utility model, rather than all the examples. Based on the example of the utility model, all other examples obtained by the ordinary skill in the art without creative labor belong to the protection scope of the utility model.

[0035] For example, Figs. 1-2As shown, the utility model discloses a gas solenoid valve with switch signal feedback, including solenoid valve body and the switch signal feedback device at the bottom of solenoid valve body, switch signal feedback device includes casing 9, first signal line 7, second signal line 10, conducting spring 8 and feedback spring 6, usually for the convenience of existing solenoid valve structure upgrading, make existing traditional solenoid valve have switch signal feedback function, casing 9 and the valve body 1 of solenoid valve body are connected together through bolt. The top of casing 9 is equipped with the accommodation recess, and the first end of first signal line 7 and second signal line 10 is located in the accommodation recess, and the second end is worn casing 9, and is connected with remote controller. The first end of second signal line is connected with conducting spring 8, and the free end of conducting spring 8 is located above the first end of first signal line, and is arranged corresponding with the first end of first signal line 7. The top of conducting spring 8 is provided with feedback spring 6, usually feedback spring 6 is arranged in the central hole of valve body 1, and can move freely up and down. One end of feedback spring 6 is connected with the valve core 4 of solenoid valve body, and the other end is located above conducting spring 8. Of course, feedback spring 6 can be directly connected with valve core 4, when valve core 4 moves upwards, valve core 4 drives feedback spring 6 to move upwards to separate from conducting spring 8, at this time, conducting spring 8 is not affected by the gravity of feedback spring, and the performance is more stable. Or, feedback spring 6 selects the material with lighter quality, and is abutted between valve core 4, which is more convenient for the modification of existing solenoid valve, and the structure is simpler and convenient to disassemble. The polytetrafluoroethylene insulation layer is arranged on the side of conducting spring 8 away from first signal line 7, so that feedback spring 6 and conducting spring 8 are not communicated. Ensure that a unique signal feedback loop is formed. The valve core 4 presses feedback spring 6, and the free end of conducting spring 8 is communicated with first signal line 7 by feedback spring 6 pressing conducting spring 8, to form a signal feedback loop.

[0036] The switch signal feedback device is detachably arranged at the bottom of the solenoid valve body, which not only reduces the manufacturing cost, but also can be directly applied to the modification of the existing solenoid valve. The up and down movement of the valve core 4 in the solenoid valve switching process drives the feedback spring 6, the feedback spring 6 presses or moves away from the conducting spring 8, and then the free end of the conducting spring 8 is abutted or separated from the first end of the first signal line 7, and the first signal line 7 and the second signal line 10 form or break the signal feedback loop, and the signal is transmitted to the remote controller, and then the real switch state of the valve is indicated. The utility model has the advantages of simple structure, reliable performance, low manufacturing cost, and the design of spring and conducting spring is not limited by the environment, which is suitable for a wide range of working environments. The switch result of the solenoid valve is directly fed back by the signal, which significantly improves the reliability of the control system.

[0037] The electromagnetic valve body comprises a valve body 1, a hollow-structured valve cover 5, a valve core 4, a dynamic spring 3 and an electromagnetic coil 2, the bottom of the valve body 1 is connected to the top of a shell 9, the valve body 1 and the valve cover 5 jointly form a valve core movement space, the valve cover 5 is arranged on the upper part of the valve body 1 and is connected together through bolts. The threaded connection is convenient and quick to disassemble and assemble. The connection between the valve body 1 and the valve cover 5 and the connection between the valve body 1 and the shell 9 are both provided with annular grooves for accommodating O-shaped sealing rings, so that the connection between the valve body 1 and the valve cover 5 and the connection between the valve body 1 and the shell 9 are more compact and the overall sealing performance of the device is improved. The valve core 4 is located in the valve core movement space and can move up and down along the axial direction, the electromagnetic coil 2 is wound around the outer periphery of the valve cover 5, the center hole of the electromagnetic coil 2 is coaxially arranged with the valve cover 5, the valve core 4 has a blind hole at the top, the dynamic spring 3 is arranged in the blind hole, and the dynamic spring 3 extends out of the blind hole and abuts against the inner side of the top wall of the valve cover 5. The height of the dynamic spring 3 is greater than the depth of the blind hole, so that the dynamic spring 3 has an extending end after being put into the blind hole, the extending end abuts against the inner side of the top wall of the valve cover 5, and the movement area of the valve core is formed.

[0038] The overall working process is as follows: when the electromagnetic coil 2 is not powered, the dynamic spring 3 presses the valve core 4 downward, the valve core 4 drives the feedback spring 6, the feedback spring 6 presses the conductive spring 8 to move downward, so that the first signal line 7 contacts the lower surface of the conductive spring 8, since the conductive spring 8 and the second signal line 10 are in a connected state, usually welded together, thus forming a conductive loop, indicating the closed state of the electromagnetic valve; when the electromagnetic coil 2 is powered, the valve core 4 is subjected to the upward magnetic force of the electromagnetic coil 2, the valve core 4 moves upward against the pressure of the dynamic spring 3, and then the electromagnetic valve is opened, the feedback spring 6 no longer rebounds upward under the pressure of the valve core 4, the feedback spring 6 and the conductive spring 8 rebound upward, since the conductive spring 8 has a certain elasticity, under the abutting action of the feedback spring 6, the conductive spring 8 slowly rebounds until the feedback spring 6 is away from the conductive spring 8, adopting the valve core to drive the feedback spring 6 to move upward together can avoid the conductive spring 8 from shaking under the action of gravity, so that the conductive spring 8 and the first signal line 7 are intermittently conducted, and then the judgment of the operator is affected. Of course, the final movement state can also be that the feedback spring 6 and the conductive spring 8 are in the state of abutting. The circuit between the first signal line 7 and the second signal line 10 is broken, indicating the open state of the electromagnetic valve, at this time, there is no signal feedback.

[0039] The above merely describes the specific implementation of the present application, but the protection scope of the present application is not limited to this, any change or replacement within the technical scope disclosed by the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A gas solenoid valve with feedback of a switching signal, characterized by: The electromagnetic valve body and the switch signal feedback device at the bottom of the electromagnetic valve body are included. The switch signal feedback device includes a shell (9), a first signal line (7), a second signal line (10), a conductive spring (8), and a feedback spring (6). The top of the shell (9) is connected to the bottom of the electromagnetic valve body, and a receiving cavity is arranged in the middle of the top. The first ends of the first signal line (7) and the second signal line (10) are located in the receiving cavity, and the second ends of the two are connected to the remote controller. One end of the conductive spring (8) is connected to the first end of the second signal line (10), and the free end is located above the first end of the first signal line (7) and corresponds to the first end of the first signal line (7). One end of the feedback spring (6) is connected to the valve core (4) of the electromagnetic valve body, and the other end is located above the conductive spring (8), so that the feedback spring (6) presses the free end of the conductive spring (8) under the pressure provided by the valve core (4), and the first end of the first signal line (7) is in communication, forming a signal feedback loop.

2. The gas solenoid valve with feedback of switching signal according to claim 1, characterized in that: The electromagnetic valve body includes a valve body (1), a hollow structure valve cover (5), a dynamic spring (3), an electromagnetic coil (2), and the valve core (4). The bottom of the valve body (1) is connected to the top of the shell (9), and the valve body (1) and the valve cover (5) form a valve core movement space. The valve core (4) is located in the valve core movement space and can move up and down along its axis, and the top of the valve core (4) is provided with a blind hole. The dynamic spring (3) is located in the blind hole, and the dynamic spring (3) extends out of the blind hole and abuts against the inner side of the top wall of the valve cover (5). The electromagnetic coil (2) is wound around the outer periphery of the valve cover (5).

3. The gas solenoid valve with feedback of switching signal according to claim 2, characterized in that: The valve body (1) and the valve cover (5) are connected by bolts.

4. The gas solenoid valve with feedback of switching signal according to claim 2, characterized in that: The top of the shell (9) has an annular groove, and an O-shaped sealing ring is arranged in the annular groove.

5. The gas solenoid valve with feedback of switching signal according to claim 4, characterized in that: The O-shaped sealing ring is made of rubber.

6. The gas solenoid valve with feedback of switching signal according to claim 2, characterized in that: The top of the shell (9) is connected to the bottom of the valve body (1) by bolts.

7. The gas solenoid valve with feedback of switching signal according to claim 1, characterized in that: The side of the conductive spring (8) close to the feedback spring (6) has an insulating layer.

8. The gas solenoid valve with feedback of the switching signal according to claim 7, characterized in that: The insulating layer is made of polytetrafluoroethylene.

Images