Temperature-constant solenoid valve

Abstract

The utility model discloses a kind of temperature constant solenoid valve, it relates to solenoid valve technical field, the solenoid valve includes, shell, static core, fixedly connected in shell, current coil, it is set to static core outside, valve body is located at shell bottom, and its valve cavity bottom is equipped with valve port, dynamic core bottom is located in valve cavity by elastic member, permanent magnet, it is embedded in static core outside in detachable mode, when current coil is electrified, static core adsorbs dynamic core and moves up to open valve port, when power off, permanent magnet adsorbs dynamic core and keeps open state, when current coil is electrified into reverse current, static core generates reverse magnetism, dynamic core moves down and seals valve port under the reset force of elastic member, the design utilizes permanent magnet, current coil and static core cooperation, can realize zero power consumption magnetic retention under power off, ensure that solenoid valve does not appear temperature rise phenomenon also makes its valve port long-time open, and then realize flow data accurate acquisition.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valve technology, and in particular to a solenoid valve with constant temperature. Background Technology

[0002] Traditional solenoid valves often face challenges in terms of energy consumption and response speed when used in applications requiring a constant temperature environment. Common normally closed solenoid valves rely on the electromagnetic force generated by continuous energization to overcome the spring force and keep the valve open. This results in the coil operating for a long time, leading to high energy consumption, and may also create a temperature control burden due to continuous heat generation in a constant temperature environment.

[0003] In existing technologies, attempts to combine electromagnetic force and permanent magnet force to achieve low-power maintenance of the valve often suffer from problems such as complex structure, inconvenient adjustment of the permanent magnet, or insufficient sensitivity and reliability of reverse tripping. Especially in precision control systems with constant temperature, not only is it required that the solenoid valve have low static power consumption to reduce system thermal disturbance, but it is also necessary to ensure that the valve opening and closing action is rapid and reliable, and that the magnetic holding force can be easily adjusted under different operating conditions to meet diverse sealing and response requirements. Therefore, there is an urgent need for a solenoid valve structure that can effectively balance low power consumption maintenance and constant temperature environment. Utility Model Content

[0004] The main purpose of this invention is to provide a solenoid valve with constant temperature, which aims to solve the problem that the solenoid valve heats up during continuous operation, affecting the acquisition of flow data.

[0005] To achieve the above objectives, this utility model proposes a temperature-constant solenoid valve, the solenoid valve comprising:

[0006] case;

[0007] A stationary iron core is fixedly connected inside the housing;

[0008] An energized coil is sleeved on the outside of the stationary iron core;

[0009] A valve body is located at the bottom of the housing, and a valve port is provided at the bottom of its valve cavity;

[0010] The moving iron core is located in the valve cavity at its bottom via an elastic element, and its top corresponds to the stationary iron core. A sealing element is provided at its bottom to seal the valve port.

[0011] The permanent magnet is detachably embedded on the outside of the stationary iron core;

[0012] When the energized coil is energized, the stationary iron core attracts the moving iron core and moves upward to open the valve port;

[0013] When power is off, the permanent magnet attracts the moving iron core and remains in the open state;

[0014] When a reverse current is applied to the energized coil, the stationary iron core generates reverse magnetism, and the moving iron core moves downward under the action of the elastic element to seal the valve port.

[0015] Preferably, the permanent magnet component comprises two arc-shaped permanent magnets;

[0016] The static iron core has an indented annular groove on its outer side, and both permanent magnets are engaged in the annular groove.

[0017] Preferably, the moving iron core has a magnetic circuit decoupling groove recessed at the center of its top.

[0018] Preferably, the sealing element includes a rubber sealing block, which is embedded in the bottom of the moving iron core.

[0019] Preferably, an anti-collision platform is provided at the center of the bottom of the valve cavity, and the valve port is located on the side of the anti-collision platform facing the sealing element; the inner diameter of the moving iron core is larger than the inner diameter of the anti-collision platform.

[0020] Preferably, a guide sleeve is provided between the housing and the valve body to connect the two, and the moving iron core is slidably disposed within the guide sleeve.

[0021] Preferably, an annular support block is provided on the outer side of the guide sleeve, the top of the annular support block abuts against the bottom of the housing, and the bottom of the annular support block seals the valve cavity and is placed on the top of the valve body.

[0022] Preferably, a sealing ring is provided between the inner wall of the valve cavity and the outer side of the guide sleeve.

[0023] Preferably, the elastic element includes a return spring.

[0024] Preferably, the energized coil is electrically connected to a control component via a wire, and the control component is used to adjust the direction of the current flowing into the energized coil.

[0025] The beneficial effects of this utility model are as follows: This solenoid valve is based on a detachable permanent magnet embedded on the outside of the stationary iron core. When the power is off, it attracts the moving iron core to maintain the valve port in an open state, achieving zero-power magnetic holding. At the same time, it ensures that the solenoid valve will not heat up and ensures accurate acquisition of flow data. Secondly, by passing a reverse current through the energized coil to excite the reverse magnetism of the stationary iron core, the elastic element's reset force drives the moving iron core to move down efficiently to seal the valve port, which can significantly improve the bidirectional switching response speed. Furthermore, its permanent magnet is detachable, which can also be quickly replaced. Finally, the pure elastic reset mechanism under the action of reverse current avoids mechanical collision damage and greatly extends the service life. It comprehensively solves the problems of high energy consumption, large temperature drift, and slow response of traditional magnetic holding valves. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural diagram of the solenoid valve in this utility model;

[0028] Figure 2 This is an exploded view of the solenoid valve in this utility model;

[0029] Figure 3 This is a cross-sectional view of the solenoid valve in the sealed state of this utility model.

[0030] Figure 4 This is a cross-sectional view of the solenoid valve in the present invention with the valve port open.

[0031] Figure 5 This is a circuit diagram showing how the control component controls the direction of the current flowing into the energized coil in this utility model.

[0032] Label Explanation:

[0033] 1. Shell;

[0034] 2. Static iron core;

[0035] 3. Energized coil;

[0036] 4. Valve body; 41. Valve cavity; 42. Anti-collision platform; 421. Valve port;

[0037] 5. Moving iron core; 51. Sealing element; 52. Magnetic circuit decoupling groove;

[0038] 6. Elastic components;

[0039] 7. Permanent magnet components;

[0040] 8. Guide sleeve; 81. Annular bearing block;

[0041] 9. Sealing ring;

[0042] 10. Control components.

[0043] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0046] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0047] This utility model proposes a solenoid valve with constant temperature; please refer to [reference needed]. Figures 1-5The solenoid valve includes a housing 1, a stationary iron core 2, an energized coil 3, a valve body 4, a moving iron core 5, and a permanent magnet 7. The stationary iron core 2 is fixed inside the housing 1. The energized coil 3 is sleeved on the outside of the stationary iron core 2. The valve body 4 is located at the bottom of the housing 1, and its valve cavity 41 has a valve port 421 at the bottom. The bottom of the moving iron core 5 is located inside the valve cavity 41 through an elastic element 6. The top of the moving iron core 5 corresponds to the stationary iron core 2, and the bottom of the moving iron core 5 has a sealing element 51 that seals the valve port 421. The permanent magnet 7 is detachably embedded on the outside of the stationary iron core 2. When the energized coil 3 is energized, the stationary iron core 2 attracts the moving iron core 5 and moves it upward to open the valve port 421. This design enables the corresponding flow of substances within the valve ports 421 of the valve body 4. When power is off, the permanent magnet 7 attracts the moving iron core 5 to remain open, ensuring continuous flow of substances. When a reverse current is applied to the energized coil 3, the stationary iron core 2 generates reverse magnetism, and the moving iron core 5 moves down to seal the valve port 421 under the reset force of the elastic element 6, thereby preventing the flow of substances until the next discharge. The above design utilizes the permanent magnet 7, the energized coil 3, and the stationary iron core 2 to achieve zero-power magnetic holding when power is off, ensuring that the solenoid valve will not overheat and keep its valve port 421 open for a long time, thus achieving accurate acquisition of flow data.

[0048] It should be noted that in this embodiment, the solenoid valve is mainly used for gas flow. Secondly, the top of the moving iron core 5 refers to the side of the moving iron core 5 facing the stationary iron core 2, and the subsequent orientation is also based on this.

[0049] In this embodiment, please refer to Figures 2-4 The permanent magnet component 7 includes two arc-shaped permanent magnets. The corresponding stationary iron core 2 has an annular groove recessed on its outer side. Both permanent magnets are engaged in the annular groove. With this design, the operator only needs to place the permanent magnet into the annular groove, and the two arc-shaped permanent magnets will be spliced ​​into a ring-shaped permanent magnet in the annular groove. The annular permanent magnet is fixed to the outside of the stationary iron core 2 by the abutment of the top and bottom of the annular groove, and then evenly attracts the subsequent moving iron core 5. If the permanent magnet is damaged or the magnetic attraction performance is not good, and the permanent magnet needs to be replaced, the operator only needs to hold the outer ends of the permanent magnet to remove it from the annular groove. This operation is simple and convenient for users to replace quickly.

[0050] In other embodiments, the number of permanent magnets can be three, four, etc., and the specific number is determined according to the inner diameter of the stationary iron core 2.

[0051] In this embodiment, please refer to Figure 4The moving iron core 5 has a magnetic circuit decoupling groove 52 recessed at the center of its top. This magnetic circuit decoupling groove 52 is designed to ensure that the moving iron core 5 can be stably attracted by the permanent magnet 7 after power is cut off. Specifically, the magnetic circuit decoupling groove 52 constrains the permanent magnetic field in the recessed area. In other words, the permanent magnetic lines of force of the permanent magnet 7 are constrained in the recessed groove at the top of the moving iron core 5, preventing the magnetic field from diverging and maintaining the stability of the attraction. This ensures that the valve cavity 41 is connected to the other valve ports 421. Furthermore, when a reverse current is applied to the energized coil 3, the magnetic field at the edge of the magnetic circuit decoupling groove 52 will quickly disintegrate. Under the combined action of the reverse magnetic force of the stationary iron core 2 and the elastic element 6, the moving iron core 5 quickly disengages from the stationary iron core 2, sealing the valve port 421. Obviously, this magnetic circuit decoupling groove 52 design not only improves the attraction force of the permanent magnet 7 on the moving iron core 5, but also solves the problem of response delay between the stationary iron core 2 and the moving iron core 5.

[0052] In this embodiment, an anti-collision platform 42 is provided at the center of the bottom of the valve cavity 41, and the valve port 421 is located on the side of the anti-collision platform 42 facing the sealing element 51. The inner diameter of the moving iron core 5 is larger than the inner diameter of the anti-collision platform 42. This design utilizes the anti-collision platform 42 to ensure that the moving iron core 5 will not contact the bottom of the valve cavity 41 each time it seals the valve port 421, thereby protecting the moving iron core 5 and enabling the solenoid valve to be used for a long time.

[0053] For further details, please refer to... Figure 3 The sealing element 51 includes a rubber sealing block, which is embedded in the bottom of the moving iron core 5. This design utilizes the sealing and flexibility of the rubber sealing block to buffer the impact of the sealing element 51 on the edge of the valve port 421, and also ensures that gas will not enter the valve cavity 41 through the valve port 421 channel.

[0054] In other embodiments, the seal 51 can also be other structures, such as a silicone sealing block, as long as it can meet the requirements of sealing and flexibility.

[0055] In this embodiment, a guide sleeve 8 is provided between the housing 1 and the valve body 4 to connect the two. The moving iron core 5 is slidably disposed in the guide sleeve 8. The guide sleeve 8 mainly plays a guiding role, so that the moving iron core 5 can move along a predetermined path, thereby sealing or opening the valve port 421.

[0056] Furthermore, an annular bearing block 81 is provided on the outer side of the guide sleeve 8. The top of the annular bearing block 81 abuts against the bottom of the housing 1. The bottom of the annular bearing block 81 seals the valve cavity 41 and is placed on the top of the valve body 4. The annular bearing block 81 is provided to stabilize the connection between the housing 1 and the valve body 4. In essence, it also ensures that the moving iron core 5 can move more stably.

[0057] The sealing ring 9 is provided between the inner wall of the valve cavity 41 and the outer side of the guide sleeve 8 to prevent gas leakage in the valve cavity 41 and improve the airtightness of the valve cavity 41.

[0058] In this embodiment, the elastic element 6 includes a return spring, which mainly provides restoring force to the moving iron core 5, so that the moving iron core 5 can quickly and tightly press the valve port 421. In other embodiments, the elastic element 6 may also be a wave spring, etc.

[0059] In this embodiment, please refer to Figure 2 and Figure 5 The energized coil 3 is electrically connected to the control component 10 via a wire. The control component 10 is used to adjust the direction of the current flowing into the energized coil 3, thereby changing the magnetism of the stationary iron core 2 and achieving the attraction and repulsion of the moving iron core 5.

[0060] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A temperature-constant solenoid valve, characterized in that, The solenoid valve includes: case; A stationary iron core is fixedly connected inside the housing; An energized coil is sleeved on the outside of the stationary iron core; A valve body is located at the bottom of the housing, and a valve port is provided at the bottom of its valve cavity; The moving iron core is located in the valve cavity at its bottom via an elastic element, and its top corresponds to the stationary iron core. A sealing element is provided at its bottom to seal the valve port. The permanent magnet is detachably embedded on the outside of the stationary iron core; When the energized coil is energized, the stationary iron core attracts the moving iron core and moves upward to open the valve port; When power is off, the permanent magnet attracts the moving iron core and remains in the open state; When a reverse current is applied to the energized coil, the stationary iron core generates reverse magnetism, and the moving iron core moves downward under the action of the elastic element to seal the valve port.

2. The solenoid valve according to claim 1, characterized in that, The permanent magnet component includes two arc-shaped permanent magnets; The static iron core has an indented annular groove on its outer side, and both permanent magnets are engaged in the annular groove.

3. The solenoid valve according to claim 2, characterized in that, The moving iron core has a magnetic circuit decoupling groove recessed at the center of its top.

4. The solenoid valve according to claim 1, characterized in that, The sealing element includes a rubber sealing block, which is embedded in the bottom of the moving iron core.

5. The solenoid valve according to claim 4, characterized in that, An anti-collision platform is provided at the center of the bottom of the valve cavity, and the valve port is located on the side of the anti-collision platform facing the sealing element; the inner diameter of the moving iron core is larger than the inner diameter of the anti-collision platform.

6. The solenoid valve according to claim 1, characterized in that, A guide sleeve is provided between the housing and the valve body to connect the two, and the moving iron core is slidably disposed within the guide sleeve.

7. The solenoid valve according to claim 6, characterized in that, An annular support block is provided on the outer side of the guide sleeve. The top of the annular support block abuts against the bottom of the housing. The bottom of the annular support block seals the valve cavity and is placed on the top of the valve body.

8. The solenoid valve according to claim 7, characterized in that, A sealing ring is provided between the inner wall of the valve cavity and the outer side of the guide sleeve.

9. The solenoid valve according to claim 1, characterized in that, The elastic element includes a return spring.

10. The solenoid valve according to any one of claims 1-9, characterized in that, The energized coil is electrically connected to a control component via a wire, and the control component is used to adjust the direction of the current flowing into the energized coil.

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