Electromagnetic valve and liquid supply system

Abstract

The utility model provides an electromagnetic valve and a liquid supply system, the electromagnetic valve comprises a valve body, the valve body is internally provided with an overflowing channel penetrating through the left side and the right side of the valve body, the valve body is further internally provided with a check block dividing the overflowing channel into two parts, and the check block is provided with an overflowing hole; the connecting seat is arranged on the periphery of the valve body and is opposite to the overflowing hole; the valve rod assembly is arranged in the connecting base, the valve rod assembly comprises a valve rod, and the valve rod can do linear motion towards or away from the overflowing hole so that the first end of the valve rod can block or open the overflowing hole; and the temperature detection assembly comprises a temperature sensor, a containing cavity is formed in the portion, close to the first end, of the valve rod, the temperature sensor is arranged in the containing cavity, and the detection end of the temperature sensor right faces the overflowing hole. The electromagnetic valve can accurately monitor the temperature of liquid flowing through the electromagnetic valve in real time, and is simple in structure and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a electromagnetic valve and a liquid supply system. Background Art

[0002] Solenoid valves are important components in existing industrial automation equipment and control systems, and are important basic components in the process of automated control that can control fluids. In principle, solenoid valves can be divided into direct-acting solenoid valves, step-by-step direct-acting solenoid valves, and pilot-operated solenoid valves. Different types and models of solenoid valves are suitable for different scenarios, and you can choose the appropriate type according to functional needs. In a control system, the flow of liquids and gases can be controlled by solenoid valves. For example, the flow direction, flow rate, and flow rate of the fluid in the entire system can be controlled by solenoid valves, thereby achieving different control functions. At present, most of the existing solenoid valves can only realize conventional opening and closing functions, and the functions are relatively single. If you want to further integrate detection functions such as temperature and flow, the structure of the solenoid valve will become more complicated, and the cost will be relatively high. Utility Model Content

[0003] In view of this, the utility model provides a solenoid valve and a liquid supply system, which are used to solve the problem that the existing solenoid valve is difficult to realize temperature detection and the solenoid valve structure is complicated after the temperature detection function is integrated.

[0004] In order to solve the above technical problems, the utility model provides a solenoid valve, which comprises:

[0005] A valve body, wherein a flow passage penetrating the left and right sides of the valve body is provided in the valve body, and a block is also provided in the valve body to divide the flow passage into two parts, and a flow hole is provided in the block;

[0006] A connecting seat, the connecting seat is arranged on the outer periphery of the valve body and directly faces the flow hole;

[0007] A valve stem assembly, the valve stem assembly is arranged in the connecting seat, the valve stem assembly includes a valve stem, and the valve stem can make a linear movement toward or away from the flow hole so that the first end of the valve stem blocks or opens the flow hole;

[0008] A temperature detection component, the temperature detection component includes a temperature sensor, an accommodating cavity is opened inside the valve stem near the first end, the temperature sensor is arranged in the accommodating cavity, and the detection end of the temperature sensor is opposite to the flow hole.

[0009] In some embodiments, optionally, the temperature detection component also includes a temperature detection circuit, a connecting hole is opened on the outer periphery of the part of the valve stem located inside the connecting seat, the connecting hole is connected to the accommodating cavity, and the wiring of the temperature sensor is connected to the temperature detection circuit via the accommodating cavity and the connecting hole.

[0010] In some embodiments, optionally, the valve stem assembly also includes an iron core, a coil and a seal, the valve stem is fixedly connected to the iron core, the seal is located on the first end surface of the valve stem, the coil is located on the outer periphery of the iron core, and the iron core can move linearly under the drive of the coil to drive the valve stem to move.

[0011] In some embodiments, optionally, the valve stem assembly further includes an elastic member, which is disposed between the iron core and the connecting seat. When the iron core is driven by the coil, the elastic member undergoes elastic deformation to drive the iron core to return to its original position when the coil stops driving the iron core.

[0012] In some embodiments, optionally, the inner wall surface of the flow hole is inwardly recessed to form a groove, and a permanent magnet is arranged in the groove. When the first end of the valve stem blocks the flow hole, the permanent magnet attracts the valve stem.

[0013] In some embodiments, optionally, the solenoid valve further comprises:

[0014] The switch detection component includes a Hall sensor, and the Hall sensor is arranged in the accommodating cavity. When the first end of the valve stem approaches or moves away from the flow hole, the magnetic field intensity detected by the Hall sensor changes.

[0015] In some embodiments, optionally, the switch detection component further includes a switch detection circuit, and the wiring of the Hall sensor is connected to the switch detection circuit via the accommodating cavity and the connecting hole.

[0016] In some embodiments, optionally, the switch detection component further includes a fault warning unit, the fault warning unit is disposed outside the connection socket, and the switch detection circuit is connected to the fault warning unit.

[0017] In some embodiments, optionally, the first end of the valve stem at least partially protrudes into the flow hole, and the temperature sensor is disposed in the portion of the valve stem that protrudes into the flow hole.

[0018] Another aspect of the present invention is to provide a liquid supply system, which includes the solenoid valve as described in any one of the above items.

[0019] The beneficial effects of the above technical solution of the utility model are as follows:

[0020] In the utility model, a temperature sensor is arranged inside one end of the valve stem of the solenoid valve close to the flow hole, and the temperature sensor is directly opposite to the flow hole. Since this part of the valve body is always in contact with the liquid in the flow hole, real-time and accurate detection of the liquid temperature in the solenoid valve can be achieved. In addition, the solenoid valve of the utility model has a simple structure, hardly changes the original valve body structure, and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the solenoid valve according to an embodiment of the utility model. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0023] At present, most of the existing solenoid valves can only realize the conventional opening and closing functions, and the functions are relatively simple. If the temperature, flow rate and other detection functions are to be further integrated, the structure of the solenoid valve will become more complicated and the cost will be relatively high.

[0024] Therefore, the utility model embodiment provides a solenoid valve, such as Figure 1 As shown, the solenoid valve comprises: a valve body 10, a connection seat 20, a valve stem assembly and a temperature detection assembly; wherein, a flow passage 11 penetrating the left and right sides of the valve body 10 is provided in the valve body 10, and the flow passage 11 is in an inverted T-shape in the cross section along its axial direction, and a block 12 is also provided in the valve body 10 to separate the flow passage 11 into two parts, and the block 12 can be roughly in an inverted L-shape, and a flow hole 13 is provided on the block 12, and the flow hole 13 connects the two parts of the flow passage 11 separated by the block 12. The connection seat 20 is arranged on the outer periphery of the valve body 10 and directly opposite to the flow hole 13, and the connection seat 20 can be a shell structure with a hollow interior, and the valve stem assembly is arranged in the connection seat 20. Specifically, the valve stem assembly may include a valve stem 21, which can make a linear motion toward or away from the flow hole 13 so that the first end of the valve stem 21 blocks or opens the flow hole 13, thereby achieving the blocking or conduction of the flow channel 11, that is, achieving the blocking or flow of the liquid.

[0025] In the embodiment of the present application, the temperature detection component includes a temperature sensor 31, and a receiving cavity 211 is provided inside the valve stem 21 near the first end, and the temperature sensor 31 is arranged in the receiving cavity 211, and the detection end of the temperature sensor 31 is directly opposite to the flow hole 13. Therefore, since the first end of the valve stem 21 is used to block the flow hole 13, that is, the first end of the valve stem 21 is always in contact with the liquid of the temperature to be detected, the accuracy of the detected liquid temperature can be ensured. In addition, the detection end of the temperature sensor 31 is directly opposite to the flow hole 13, which can further improve the accuracy of its detection.

[0026] In some embodiments, one end of the valve stem 21 may be at least partially protruded into the flow hole 13, and the temperature sensor 31 is disposed in the portion of the valve stem 21 that extends into the flow hole 13. In this way, the contact area between the portion of the valve stem 21 that wraps the temperature sensor 31 and the liquid can be further expanded, thereby further improving the accuracy of its temperature detection.

[0027] In some embodiments of the present application, the temperature detection component further includes a temperature detection circuit 32, and a connection hole 212 is provided on the outer periphery of the portion of the valve stem 21 located inside the connection seat 20, the connection hole 212 is communicated with the accommodating cavity 211, and the wiring of the temperature sensor 31 is connected to the temperature detection circuit 32 via the accommodating cavity 211 and the connection hole 212. In other words, the wiring between the temperature sensor 31 and the temperature detection circuit 32 passes through the interior of the valve stem 21 and extends out from the portion of the valve stem 21 located at the connection seat 20. Thus, while achieving temperature detection, the structure of the original solenoid valve is hardly changed, and its original sealing effect is not affected.

[0028] In some other embodiments of the present application, the valve stem 21 assembly further includes an iron core 22, a coil 23 and a seal 24, the valve stem 21 is fixedly connected to the iron core 22, the seal 24 is located at the first end face of the valve stem 21, the coil 23 is located at the periphery of the iron core 22, and the iron core 22 can move linearly under the drive of the coil 23 to drive the valve stem 21 to move. Among them, the seal 24 can be a sealing ring, etc., and by arranging a sealing ring on the first end face of the valve stem 21, the sealing effect of blocking the flow hole 13 can be improved. The coil 23 is connected to an external drive circuit. When the coil 23 is powered on, the coil 23 is powered, and the iron core 22 can be driven to move in a straight line. When the coil 23 is powered off, the coil 23 loses power, and the coil 23 stops driving the iron core 22 to move.

[0029] In some embodiments of the present application, the valve stem 21 assembly further includes an elastic member 25, which is disposed between the iron core 22 and the connecting seat 20. When the iron core 22 is driven by the coil 23, the elastic member 25 undergoes elastic deformation to drive the iron core 22 to return to its original position when the coil 23 stops driving the iron core 22. Specifically, the elastic member 25 may be a spring or other component.

[0030] In other embodiments of the present application, the inner wall surface of the flow hole 13 is inwardly concave to form a groove, and a permanent magnet 41 is arranged in the groove. When the first end of the valve stem 21 blocks the flow hole 13, the permanent magnet 41 attracts the valve stem 21. In other words, a groove can be provided on the inner wall surface of the flow hole 13 of the stopper 12, such as a ring-shaped groove, and a permanent magnet 41 is fixedly placed in the groove. When one end of the valve stem 21 blocks the flow hole 13, since the valve stem 21 is close to the permanent magnet 41, the permanent magnet 41 can generate a magnetic attraction to the valve stem 21, thereby further compressing the seal 24 arranged on the first end of the valve stem 21, so that the flow hole 13 is blocked more tightly to avoid leakage.

[0031] In some other embodiments of the present application, the solenoid valve further includes a switch detection component, and the switch detection component includes a Hall sensor 51, and the Hall sensor 51 is arranged in the accommodating cavity 211. When the first end of the valve stem 21 approaches or moves away from the flow hole 13, the magnetic field strength detected by the Hall sensor 51 changes. That is to say, by arranging the Hall sensor 51 in the accommodating cavity 211 inside the first end of the valve stem 21, when the first end of the valve stem 21 approaches or moves away from the flow hole 13, the distance between the Hall sensor 51 and the permanent magnet 41 arranged in the block 12 changes, so that the magnetic field strength detected by the Hall sensor 51 changes, that is, the magnitude of the current signal output by the Hall sensor 51 changes. According to this situation, it can be known whether the valve stem 21 moves into place to completely block the flow hole 13, and then the switch detection is realized.

[0032] In some embodiments of the present application, the switch detection assembly further includes a switch detection circuit 52, and the wiring of the Hall sensor 51 is connected to the switch detection circuit 52 via the accommodating cavity 211 and the connecting hole 212. Similarly, the wiring between the Hall sensor 51 and the switch detection circuit 52 passes through the interior of the valve stem 21 and extends out of the portion of the valve stem 21 located at the connecting seat 20. Thus, while realizing the switch detection, the structure of the original solenoid valve is hardly changed, and its original sealing effect is not affected.

[0033] In some other embodiments of the present application, the switch detection assembly further includes a fault warning unit 61, the fault warning unit 61 is disposed outside the connection seat 20, and the switch detection circuit 52 is connected to the fault warning unit 61. Exemplarily, the fault warning unit 61 can be a warning light. When the switch detection circuit 52 receives a detection signal output by the Hall sensor 51 that is less than a certain threshold value, it indicates that the distance between the valve stem 21 and the permanent magnet 41 does not meet the requirements, that is, the flow hole 13 is not blocked. At this time, the switch detection circuit 52 can output a signal to light up the warning light to remind the staff that the switch function of the solenoid valve is faulty, so that the staff can check and replace it in time.

[0034] In some embodiments of the present application, a sealing ring is provided between the valve stem 21 and the connecting seat 20. By providing a sealing ring between the valve stem 21 and the connecting seat 20, the sealing effect between the two can be improved to prevent liquid from leaking into the connecting seat 20.

[0035] In the embodiment of the utility model, a temperature sensor is arranged inside the end of the valve stem of the solenoid valve close to the flow hole, and the temperature sensor is directly opposite to the flow hole. Since this part of the valve body is always in contact with the liquid in the flow hole, real-time and accurate detection of the liquid temperature in the solenoid valve can be achieved. In addition, the solenoid valve of the utility model has a simple structure, hardly changes the original valve body structure, and has low cost.

[0036] On the other hand, an embodiment of the present application further provides a liquid supply system, which includes the solenoid valve described in any of the above embodiments and can achieve the same technical effect. To avoid repetition, it will not be described here.

[0037] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the utility model belongs. The words "first", "second" and similar words used in the patent application specification and claims of the utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate quantity restrictions, but indicate the existence of at least one. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0038] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A solenoid valve, characterized in that: include: A valve body, wherein a flow passage penetrating the left and right sides of the valve body is provided in the valve body, and a block is also provided in the valve body to divide the flow passage into two parts, and a flow hole is provided in the block; A connecting seat, the connecting seat is arranged on the outer periphery of the valve body and directly faces the flow hole; A valve stem assembly, the valve stem assembly is arranged in the connecting seat, the valve stem assembly includes a valve stem, and the valve stem can make a linear movement toward or away from the flow hole so that the first end of the valve stem blocks or opens the flow hole; A temperature detection component, the temperature detection component includes a temperature sensor, an accommodating cavity is opened inside the valve stem near the first end, the temperature sensor is arranged in the accommodating cavity, and the detection end of the temperature sensor is opposite to the flow hole.

2. The solenoid valve according to claim 1, characterized in that: The temperature detection component also includes a temperature detection circuit. A connecting hole is opened on the outer periphery of the portion of the valve stem located inside the connecting seat. The connecting hole is connected to the accommodating cavity. The wiring of the temperature sensor is connected to the temperature detection circuit via the accommodating cavity and the connecting hole.

3. The solenoid valve according to claim 2, characterized in that: The valve stem assembly also includes an iron core, a coil and a seal. The valve stem is fixedly connected to the iron core, the seal is located on the first end surface of the valve stem, and the coil is located on the outer periphery of the iron core. The iron core can move linearly under the drive of the coil to drive the valve stem to move.

4. The solenoid valve according to claim 3, characterized in that: The valve stem assembly also includes an elastic member, which is arranged between the iron core and the connecting seat. When the iron core is driven by the coil, the elastic member undergoes elastic deformation to drive the iron core to return to its original position when the coil stops driving the iron core.

5. The solenoid valve according to claim 3, characterized in that: The inner wall surface of the flow hole is inwardly recessed to form a groove, and a permanent magnet is arranged in the groove. When the first end of the valve stem blocks the flow hole, the permanent magnet attracts the valve stem.

6. The solenoid valve according to claim 5, characterized in that: The solenoid valve further comprises: The switch detection component includes a Hall sensor, and the Hall sensor is arranged in the accommodating cavity. When the first end of the valve stem approaches or moves away from the flow hole, the magnetic field intensity detected by the Hall sensor changes.

7. The solenoid valve according to claim 6, characterized in that: The switch detection component also includes a switch detection circuit, and the wiring of the Hall sensor is connected to the switch detection circuit via the accommodating cavity and the connecting hole.

8. The solenoid valve according to claim 7, characterized in that: The switch detection component also includes a fault warning unit, which is arranged outside the connection socket, and the switch detection circuit is connected to the fault warning unit.

9. The solenoid valve according to claim 1, characterized in that: The first end of the valve stem at least partially protrudes into the flow hole, and the temperature sensor is arranged in the portion of the valve stem that protrudes into the flow hole.

10. A liquid supply system, characterized in that: Comprising a solenoid valve as described in any one of claims 1-9.

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