SV8K recoil type diaphragm normally open solenoid valve

Abstract

The utility model discloses an SV8K recoil-type diaphragm normally open solenoid valve, including a valve body, a valve cover, a diaphragm assembly and a packaging sleeve. The outer curved surface of the upper end of the packaging sleeve is installed with a solenoid valve coil. The interior of the packaging sleeve is sequentially packaged with an upper moving iron core, a fixed iron core, a transmission rod, a lower moving iron core and a lower moving iron retaining spring from top to bottom. An idle stroke is provided between the bottom of the upper moving iron core and the upper top of the fixed iron core. The diaphragm assembly is riveted and assembled by an auxiliary valve component, a tray, a diaphragm and a clamping ring. The diaphragm assembly is installed on the inner side of the upper end of the valve body, and the packaging sleeve is installed on the outer side of the upper end of the valve body. The lower end of the packaging sleeve is connected to the upper end of the diaphragm assembly. The utility model is suitable for occasions where the flow channel is normally open and controlled. The solenoid valve coil does not need to be powered on in the normally open state to work, thereby ensuring the stability of the flow channel system in use and increasing the overall service life of the solenoid valve coil and the valve.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to an SV8K recoil-type diaphragm normally open solenoid valve. Background Art

[0002] Solenoid valve refers to industrial equipment controlled by electromagnetics. It is a basic component for automation to control fluids. It is an actuator and is not limited to hydraulic or pneumatic. It is used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. Solenoid valves can be used with different circuits to achieve the desired control, and the accuracy and flexibility of the control can be guaranteed. There are many types of solenoid valves, and different solenoid valves play a role in different positions of the control system. The most commonly used ones are check valves, safety valves, directional control valves, speed regulating valves, etc.

[0003] Among them, SV8K recoil type diaphragm normally open solenoid valve (hereinafter referred to as: recoil type diaphragm normally open solenoid valve) is a type of normally open solenoid valve. The control of the recoil type diaphragm normally open solenoid valve is that the coil is energized to cut off the flow channel, and the coil is de-energized to keep the flow channel unobstructed. When used in a small flow system that requires a normally open medium working state, the solenoid valve coil does not need to be energized to ensure the unobstructed state of the flow channel, ensuring the stability of the system during use, extending the service life, and reducing the manufacturing cost of the system.

[0004] However, in actual use of the prior art, the recoil type normally open solenoid valve is suitable for a large number of refrigeration systems during use, wherein the valve core of the recoil type normally open solenoid valve is usually piston-type, which requires high manufacturing precision of the recoil type normally open solenoid valve, and is prone to jamming in a normally open low pressure difference system environment. At the same time, the recoil type normally open solenoid valve with a piston-type valve core has a reaction time of 30mS to 45mS during control reaction, which makes its reaction time relatively long. Utility Model Content

[0005] The purpose of the utility model is to provide an SV8K recoil-type diaphragm normally-open solenoid valve to solve the problem that the recoil-type normally-open solenoid valve proposed in the above-mentioned background technology is suitable for a large number of refrigeration systems during use, wherein the valve core of the recoil-type normally-open solenoid valve usually adopts a piston type, which makes the manufacturing precision of the recoil-type normally-open solenoid valve high, and is easy to get stuck in the normally-open low-pressure difference system environment, and at the same time, the recoil-type normally-open solenoid valve with a piston-type valve core has a reaction time of 30mS to 45mS during control reaction, which makes its reaction time longer.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: including a valve body, a valve cover, a diaphragm assembly and a packaging sleeve, the outer curved surface of the upper end of the packaging sleeve is installed with a solenoid valve coil, the interior of the packaging sleeve is sequentially packaged with an upper moving iron core, a fixed iron core, a transmission rod, a lower moving iron core and a lower moving iron retaining spring from top to bottom, an idle stroke is provided between the bottom of the upper moving iron core and the upper top of the fixed iron core, and the diaphragm assembly is riveted and assembled by an auxiliary valve component, a tray, a diaphragm and a clamping ring.

[0007] Preferably, the diaphragm assembly is installed on the inner side of the upper end of the valve body, the packaging sleeve is installed on the outer side of the upper end of the valve body, and the lower end of the packaging sleeve is communicated with the upper end of the diaphragm assembly.

[0008] Preferably, the valve cover is installed on the outer side of the lower end of the packaging sleeve, so that the packaging sleeve is sealed, installed and fixed by the valve cover.

[0009] Preferably, the transmission rod passes through and is movably connected to the middle of the fixed iron core, and the bottom of the upper movable iron core is located at the top end of the transmission rod.

[0010] Preferably, the upper top of the lower moving iron core is located at the bottom of the transmission rod, the upper top of the lower moving iron retaining spring is located at the bottom of the lower moving iron core, and the bottom of the lower moving iron retaining spring is located at the upper top of the diaphragm assembly.

[0011] Preferably, the tray is located at the lower end of the auxiliary valve component, the diaphragm is located at the lower end of the tray, and the clamping ring is located at the lower end of the diaphragm, so that the diaphragm is tightly combined at the lower end of the auxiliary valve component by the clamping ring and the tray.

[0012] Preferably, a pressure relief channel is provided through the middle of the auxiliary valve component, an auxiliary valve port is provided at the top end of the auxiliary valve component, and a guide hole is provided on the outer side of the diaphragm.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model has a short response time (15mS-30mS) and a small closing pressure difference (0.005MPa), which is especially suitable for small refrigeration ton systems, and can simplify customer systems and reduce the manufacturing cost of refrigeration systems;

[0015] 2. The utility model is also suitable for occasions where the flow channel is normally open and controlled. It can make the solenoid valve coil work without power supply in the normally open state, ensure the stable use of the flow channel system, increase the overall service life of the solenoid valve coil and the valve, and is widely applicable to gas and liquid media. It has a simple structure, a large opening range, and a stable control effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic cross-sectional view of the overall structure of the utility model SV8K recoil type diaphragm type normally open solenoid valve;

[0017] Figure 2 This is a schematic diagram of the action position of the utility model SV8K recoil type diaphragm type normally open solenoid valve after power is supplied;

[0018] Figure 3 It is a schematic cross-sectional view of the overall structure of the diaphragm assembly of the utility model.

[0019] In the figure: 1. valve body; 2. valve cover; 3. diaphragm assembly; 301. auxiliary valve component; 302. tray; 303. diaphragm; 304. clamping ring; 4. packaging sleeve; 5. solenoid valve coil; 6. upper moving iron core; 7. fixed iron core; 8. transmission rod; 9. lower moving iron core; 10. lower moving iron retaining spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0021] See also Figure 1-3 The utility model provides a technical solution for a SV8K recoil-type diaphragm normally open solenoid valve: it includes a valve body 1, a valve cover 2, a diaphragm assembly 3 and a packaging sleeve 4, the diaphragm assembly 3 is installed on the inner side of the upper end of the valve body 1, the packaging sleeve 4 is installed on the outer side of the upper end of the valve body 1, the lower end of the packaging sleeve 4 is connected to the upper end of the diaphragm assembly 3, the valve cover 2 is installed on the outer side of the lower end of the packaging sleeve 4, so that the packaging sleeve 4 is sealed and fixed by the valve cover 2, the outer curved surface of the upper end of the packaging sleeve 4 is installed with a solenoid valve coil 5, the interior of the packaging sleeve 4 is sequentially packaged with an upper moving iron core 6, a fixed iron core 7, a transmission rod 8, a lower moving iron core 9 and a lower moving iron retaining spring 10 from top to bottom, and the transmission rod 8 penetrates and fits and is movably connected to the middle of the fixed iron core 7, and the bottom of the upper moving iron core 6 is located on the top of the transmission rod 8 The upper end of the upper moving iron core 6 and the upper top of the fixed iron core 7 are provided with an idle stroke, the upper top of the lower moving iron core 9 is located at the bottom of the transmission rod 8, the upper top of the lower moving iron retaining spring 10 is located at the bottom of the lower moving iron core 9, and the bottom of the lower moving iron retaining spring 10 is located at the upper top of the diaphragm assembly 3. The diaphragm assembly 3 is riveted and assembled by an auxiliary valve component 301, a tray 302, a diaphragm 303 and a clamping ring 304. The tray 302 is located at the lower end of the auxiliary valve component 301, the diaphragm 303 is located at the lower end of the tray 302, and the clamping ring 304 is located at the lower end of the diaphragm 303, so that the diaphragm 303 is tightly combined with the tray 302 through the clamping ring 304, and a pressure relief channel is opened through the middle of the auxiliary valve component 301, an auxiliary valve port is opened at the upper top of the auxiliary valve component 301, and a guide hole is opened on the outer side of the diaphragm 303.

[0022] Working principle: When in use, when the solenoid valve coil 5 of the utility model is energized, the magnetic circuit on the reverse packaged fixed iron core 7 is stimulated to generate electromagnetic force, which sucks the upper moving iron core 6 packaged in the upper part of the sleeve downward. Since the upper moving iron core 6 has an empty stroke downward, an instantaneous downward impact force is applied to the upper moving iron core 6, and the upper moving iron core 6 is then transmitted downward to the lower moving iron core 9 through the transmission rod 8, overcoming the holding force of the lower moving iron holding spring 10, so that the lower moving iron core 9 closes the auxiliary valve port at the upper end of the diaphragm assembly 3, and the high-pressure fluid medium continues to enter the upper cavity of the diaphragm assembly 3 through the guide hole on the diaphragm 303. Instantaneously, due to the cutting off of the pressure relief passage in the upper cavity of the diaphragm assembly 3, a downward pressure is formed on the upper end of the diaphragm assembly 3, and the lower end of the diaphragm assembly 3 is the outlet flow channel of the main valve port. The fluid pressure at this end can be regarded as "0" or extremely low. At this time, a downward pressure difference is formed between the upper and lower ends of the diaphragm assembly 3, so that the diaphragm assembly 3 is pressed against the main valve port, thereby closing the valve;

[0023] When the solenoid valve coil 5 is powered off, the electromagnetic force disappears, the upper moving iron core 6 separates from the fixed iron core 7 and loses its force, and the lower moving iron core 9 leaves the auxiliary valve port on the diaphragm assembly 3 under the upward holding force of the lower moving iron holding spring 10, opens the auxiliary valve port on the upper end of the diaphragm assembly 3, connects the pressure relief channel, and connects with the outlet channel of the main valve port, so that the pressure on the upper end of the diaphragm assembly 3 tends to the pressure on the main valve port (close to "0" or very low), and the lower end of the diaphragm assembly 3 forms a recoil pressure under the upward force of the fluid medium continuously entering the inlet end cavity of the valve body 1, which opens the main valve port and connects the working medium flowing through the solenoid valve;

[0024] Through the above analysis, in order to ensure the stability of the valve port closing and opening performance, the ratio of the positive impulse stroke to the stroke between the upper moving iron core 6 and the fixed iron core 7 is 3.3:1, and the ratio of the diaphragm guide hole on the diaphragm assembly 3 to the auxiliary valve port diameter is 0.5:1, so that the valve closing and opening performance can be stable. The diaphragm assembly 3 is riveted and combined by the auxiliary valve component 301, the tray 302, the diaphragm 303 and the clamping ring 304, so that the auxiliary valve component 301, the diaphragm 303 and the tray 302 are tightly combined without looseness or deformation, thereby ensuring the working tolerance times.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. SV8K recoil type diaphragm normally open solenoid valve, characterized by: The invention comprises a valve body (1), a valve cover (2), a diaphragm assembly (3) and a packaging sleeve (4); a solenoid valve coil (5) is installed on the outer curved surface of the upper end of the packaging sleeve (4); an upper moving iron core (6), a fixed iron core (7), a transmission rod (8), a lower moving iron core (9) and a lower moving iron retaining spring (10) are sequentially packaged inside the packaging sleeve (4) from top to bottom; an idle stroke is provided between the bottom of the upper moving iron core (6) and the upper top of the fixed iron core (7); and the diaphragm assembly (3) is riveted and assembled from an auxiliary valve component (301), a tray (302), a diaphragm (303) and a clamping ring (304).

2. The SV8K recoil type diaphragm normally open solenoid valve according to claim 1 is characterized in that: The diaphragm assembly (3) is installed on the inner side of the upper end of the valve body (1), the packaging sleeve (4) is installed on the outer side of the upper end of the valve body (1), and the lower end of the packaging sleeve (4) is connected to the upper end of the diaphragm assembly (3).

3. The SV8K recoil type diaphragm normally open solenoid valve according to claim 2 is characterized in that: The valve cover (2) is installed and arranged on the outer side of the lower end of the packaging sleeve (4), so that the packaging sleeve (4) is sealed, installed and fixed by the valve cover (2).

4. The SV8K recoil type diaphragm normally open solenoid valve according to claim 3 is characterized in that: The transmission rod (8) penetrates and is movably connected to the middle of the fixed iron core (7), and the bottom of the upper movable iron core (6) is located at the top of the transmission rod (8).

5. The SV8K recoil type diaphragm normally open solenoid valve according to claim 4 is characterized in that: The upper top of the lower moving iron core (9) is located at the bottom of the transmission rod (8), the upper top of the lower moving iron retaining spring (10) is located at the bottom of the lower moving iron core (9), and the bottom of the lower moving iron retaining spring (10) is located at the upper top of the diaphragm assembly (3).

6. The SV8K recoil type diaphragm normally open solenoid valve according to claim 5 is characterized in that: The tray (302) is located at the lower end of the auxiliary valve component (301), the diaphragm (303) is located at the lower end of the tray (302), and the clamping ring (304) is located at the lower end of the diaphragm (303), so that the diaphragm (303) is tightly combined at the lower end of the auxiliary valve component (301) by the clamping ring (304) and the tray (302).

7. The SV8K recoil type diaphragm normally open solenoid valve according to claim 6 is characterized in that: A pressure relief channel is provided through the middle of the auxiliary valve component (301), an auxiliary valve port is provided at the top end of the auxiliary valve component (301), and a guide hole is provided on the outer side of the diaphragm (303).

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