Oxygen generator pressure control solenoid valve structure

Abstract

The utility model discloses an oxygen generator belt pressure control type solenoid valve structure, which comprises a main valve body and an auxiliary valve body, a piston rod, a pressure spring and a piston sleeve are arranged in the auxiliary valve body, one end of the piston rod is inserted into an air outlet hole of the main valve body, the other end of the piston rod extends into the piston sleeve, one end of the pressure spring abuts against the piston sleeve, and the other end of the pressure spring abuts against the piston rod. An electromagnetic mechanism is further arranged in the auxiliary valve body, and the electromagnetic mechanism is powered on to attract the piston sleeve to move relative to the auxiliary valve body. According to the electromagnetic valve, through the arrangement of the double blocking structures, when current of the electromagnetic mechanism flows in the forward direction, the outer sleeve is opened, the valve is opened when air pressure is appropriate, when the air pressure exceeds the set air pressure, the current direction is triggered to change, magnetic poles are switched, the valve is forcibly closed, and it is ensured that the valve is closed after the pressure exceeds the preset pressure. The electromagnetic valve can be rapidly closed, high-pressure airflow is prevented from entering a next area and an inner pipe of the assembly, and damage to the assembly caused by too high air pressure is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to oxygen generator accessory technical field, specifically an oxygen generator pressure control solenoid valve structure. BACKGROUND

[0002] Oxygen is the indispensable resource for human survival, and occupies a very important position in daily life, especially in the process of disease treatment or first aid. At the beginning, people stored the prepared oxygen in steel cylinders at low temperature and high pressure for future use, but it was very inconvenient to use. Therefore, the oxygen generator came into being. Oxygen generator can not only be used for disease treatment or first aid, but also can promote health and improve work efficiency for healthy people.

[0003] In the existing oxygen generator, an electromagnetic valve is generally used to control the input of compressed gas and the discharge of gas discharged through the molecular sieve. Correspondingly, a valve structure for discharging gas is generally provided at the output port of the oxygen generator. For the oxygen generator, part of the internal area can withstand high pressure, and part of the assembly has poor pressure resistance to high pressure. In addition, the optimal oxygen pressure that can be directly used at the end of the oxygen generator is 40-100kPa. Too high or too low gas pressure will damage the oxygen generator and is not conducive to use. However, the common electromagnetic valve generally has a single function, which only plays the role of cutting off the gas flow. SUMMARY

[0004] In view of the above, the present application provides an oxygen generator pressure control solenoid valve structure. The electromagnetic valve of the embodiment combines part of the function structure of the electromagnetic valve and the pressure regulating valve according to the requirements of the use scene, thereby forming an electromagnetic valve with pressure control structure design, which can avoid the passage of oxygen with too high pressure into the next area through the electromagnetic valve.

[0005] The utility scheme provides an oxygen generator with a pressure control type electromagnetic valve structure, which comprises a main valve body and a secondary valve body with a valve cavity. The secondary valve body is arranged opposite to the upper end opening of the valve cavity to close the valve cavity. The valve cavity is provided with an air inlet hole and an air outlet hole opposite to the secondary cavity. A piston rod, a pressure spring and a piston sleeve are arranged in the secondary valve body. One end of the piston rod is inserted into the air outlet hole of the main valve body, and the other end extends into the piston sleeve. One end of the pressure spring abuts against the piston sleeve, and the other end abuts against the piston rod to push the piston rod towards the air outlet hole. A knob and an adjusting rod driven by the knob are arranged on the secondary valve body. An electromagnetic mechanism is further arranged in the secondary valve body. The electromagnetic mechanism is energized to attract the piston sleeve to move relative to the secondary valve body.

[0006] As a further arrangement of the above scheme, a compression spring is arranged on the piston sleeve. The compression spring is used to push the piston sleeve to abut against the main valve body, thereby closing the communication between the air inlet hole and the air outlet hole. The electromagnetic mechanism is used to energize the piston sleeve to move away from the main valve body, thereby releasing the closure of the air inlet hole and the air outlet hole.

[0007] As a further arrangement of the above-mentioned scheme, a second sleeve is further arranged in the piston sleeve, the pressure spring is abutted on the inner wall of the second sleeve and the piston rod, and the pressure spring is used to drive the piston rod to block the gas outlet hole by elastic force.

[0008] As a further arrangement of the above-mentioned scheme, a second sleeve is further arranged in the piston sleeve, the pressure spring is abutted on the inner wall of the second sleeve and the piston rod, and the pressure spring is used to drive the piston rod to block the gas outlet hole by elastic force.

[0009] As a further arrangement of the above-mentioned scheme, a second sleeve is further arranged in the piston sleeve, the pressure spring is abutted on the inner wall of the second sleeve and the piston rod, and the pressure spring is used to drive the piston rod to block the gas outlet hole by elastic force.

[0010] Technical effects: the electromagnetic valve of the utility model through setting double block structure, trigger by different ways, in the electromagnetic mechanism current positive flow in the embodiment, open the outer sleeve, the valve is opened when the air pressure is appropriate, and when the air pressure exceeds the set air pressure, the valve state triggers the trigger state set by the electromagnetic mechanism, thereby causing the conduction of the secondary circuit, causing the change of the circuit current direction of the electromagnetic mechanism, causing the switching of the magnetic pole of the electromagnetic coil, thereby changing from adsorption to repulsion, thereby forcibly closing the valve, ensuring that the electromagnetic valve can quickly close the valve when the pressure exceeds the predetermined pressure, avoiding high-pressure gas flow into the next area and the inner tube of the assembly, avoiding damage to the assembly caused by excessive air pressure. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0012] Figure 1 It is a control pressure electromagnetic valve structure diagram of the utility model.

[0013] Figure 2 It is a control pressure electromagnetic valve internal structure diagram of the embodiment.

[0014] Figure 3 It is a control pressure electromagnetic valve internal section structure diagram of the embodiment.

[0015] Figure 4 It is a valve closed valve state diagram of the embodiment.

[0016] Figure 5 It is a valve open valve pressure too low state diagram of the embodiment.

[0017] Figure 6 The valve opening pressure over high state schematic diagram of the embodiment.

[0018] Marked: 1, main valve body; 11, valve cavity; 2, auxiliary valve body; 21, secondary cavity; 22, air inlet hole; 23, air outlet hole; 24, knob; 25, adjusting rod; 3, piston rod; 31, pressure spring; 32, piston sleeve; 33, top spring; 34, second sleeve; 35, contact; 36, conductive piece; 4, electromagnetic mechanism. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0020] As Figures 1-6 The utility model discloses a kind of oxygen generator with pressure control solenoid valve structures, including the main valve body 1 with valve cavity 11 and auxiliary valve body 2, the secondary cavity 21 of the auxiliary valve body 2 is opposite the upper end opening of valve cavity 11, and valve cavity 11 is provided with air inlet hole 22 and air outlet hole 23 relative to secondary cavity 21, piston rod 3, pressure spring 31 and piston sleeve 32 are provided in the auxiliary valve body 2, piston rod 3 one end is inserted into the air outlet hole 23 of main valve body 1, the other end extends into piston sleeve 32, and the other end of pressure spring 31 is abutted in piston sleeve 32, and the other end of piston rod 3 is abutted, and piston rod 3 is pushed to be close to air outlet hole 23, knob 24 and adjusting rod 25 driven by knob 24 by screw are provided on the auxiliary valve body 2, and electromagnetic mechanism 4 is also provided in the auxiliary valve body 2, and electromagnetic mechanism 4 is powered to attract piston sleeve 32 to be movable relative to auxiliary valve body 2.

[0021] As the structure is set as above, piston structure for adjusting and controlling the elasticity of pressure spring 31 by knob 24 is provided in the solenoid valve of the embodiment, and by the structure, solenoid valve can be realized in valve opening state, and gas pressure in pipe can be normally transported when it is greater than a certain numerical range.

[0022] As further setting of the above scheme, top spring 33 is provided on piston sleeve 32, and top spring 33 is used to push piston sleeve 32 to be abutted on main valve body 1, and the communication of air inlet hole 22 and air outlet hole 23 is closed, and electromagnetic mechanism 4 is used to be powered to attract piston sleeve 32 to be movable away from main valve body 1, and the closure of air inlet hole 22 and air outlet hole 23 is released.

[0023] As the structure of the above, the piston sleeve 32 of the embodiment pushes the top spring 33 to close the inlet hole 22 and the outlet hole 23 based on the elastic force in the power-off state.

[0024] As a further arrangement of the above, the piston sleeve 32 is further provided with a second sleeve 34, and the pressure spring 31 abuts against the inner wall of the second sleeve 34 and the piston rod 3, and the pressure spring 31 is used to drive the piston rod 3 to close the outlet hole 23 by the elastic force.

[0025] The second sleeve 34 of the embodiment is axially movable by the threaded cooperation of the knob 24 and the adjusting rod 25, so as to adjust the elastic stroke of the pressure spring 31, thereby adjusting the elastic force of the pressure spring 31 on one side of the piston rod 3, and realizing the pressure adjustment of the air pressure capable of pushing the piston rod 3 to move.

[0026] As a further arrangement of the above, the second sleeve 34 and the piston rod 3 are respectively provided with a contact 35 and a conductive sheet 36 on the opposite end faces, the contact 35 is electrically connected to the control circuit of the electromagnetic mechanism 4, and after the conductive sheet 36 conducts the contact 35 on the second sleeve 34, the current direction of the electromagnetic mechanism 4 is switched, the end of the second sleeve 34 protrudes out of the piston sleeve 32 and abuts against the end of the adjusting rod 25, and the adjusting rod 25 is used as the core of the electromagnetic mechanism 4, and the adjusting rod 25 is magnetized and adsorbed close to the piston sleeve 32 after the electromagnetic mechanism 4 is energized.

[0027] As the structure of the above, the embodiment is provided with the contact 35, the conductive sheet 36 and the control circuit structure of the electromagnetic mechanism 4, and reference is made to the prior art CN201220688363.5 safety high-voltage current direction converter. The movable contact 35 and the conductive sheet 36 of the piston rod 3 are connected to be energized, the conduction of the secondary circuit is triggered, the current switch of the control circuit of the electromagnetic mechanism 4 is triggered to act, and the structure design in the prior art switches the current direction of the electromagnetic mechanism 4, switches the positive and negative poles of the electromagnetic coil of the electromagnetic mechanism 4, changes the electromagnetic poles, changes the magnetic poles of the permanent magnet on the piston sleeve 32 from attraction to repulsion, and in the repulsion state, the piston sleeve 32 moves away from the main valve body 1 to close the electromagnetic valve.

[0028] The pressure control electromagnetic valve of the embodiment includes a main valve body 1 and a secondary valve body 2, which are respectively provided with a valve cavity 11 and a secondary cavity 21, and are provided with a piston sleeve 32, a piston rod 3, a pressure spring 31 and a top spring 33 in the valve cavity 11 and the secondary cavity 21. In use, the electromagnetic valve of the embodiment has multiple states:

[0029] ① closed valve state, the electromagnetic mechanism 4 is de-energized, at this time, the top spring 33 elastically abuts against the piston sleeve 32 and is abutted on the main valve body 1, the inlet hole 22 and the outlet hole 23 are isolated and disconnected;

[0030] ②Open valve state, electromagnetic structure 4 power on, adjusting rod 25 magnetization adsorption piston sleeve 32, the air flow of inlet hole 22 from the piston sleeve 32 opening into, piston rod 3 driven by air pressure to move and compress pressure spring 31:

[0031] a, air pressure is less than 40kPa, piston rod 3 keeps plugging the outlet hole 23,

[0032] b, when the air pressure is between 40-100kPa, piston rod 3 from the outlet hole 23 away from the plugging, air flow from the inlet hole 22 through the outlet hole 23,

[0033] c, in the state of b, when the air pressure is greater than 100kPa, piston rod 3 continues to move upwards, the upper end surface abuts the lower end of the second sleeve 34, two contacts 35 and the conductive sheet 36 contact conduction, the current direction of electromagnetic mechanism 4 positive and negative switching, magnetic pole changes, and the permanent magnet on the piston sleeve 32 and the adjusting rod 25 magnetized by the electromagnetic mechanism 4 switch to repel, driven by magnetic force, the second sleeve 34 quickly moves down, isolating the connection between the inlet hole 22 and the outlet hole 23, cutting off the air flow, avoiding high pressure air flow into the next area.

[0034] The electromagnetic valve structure principle of the embodiment is as above, by setting the structure based on air pressure driving, the electromagnetic valve is triggered when the pressure is too high, the current direction is switched to adjust the magnetic pole, so as to close the valve, avoid high pressure air flow into the rear end of the electromagnetic valve, avoid the damage of high pressure air flow to the components such as air pipe, flow meter, sensor and other components not resistant to high pressure in the rear, the structure of the embodiment has the functions of electromagnetic valve and pressure regulating valve through a single electromagnetic valve, simplifies the quantity of parts and realizes better control, reduces the damage of parts in the oxygen generator.

[0035] The above is only the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A pressure control solenoid valve structure of an oxygen generator, comprising a main valve body (1) with a valve cavity (11) and a secondary valve body (2), wherein a secondary cavity (21) of the secondary valve body (2) is arranged opposite to an upper end opening of the valve cavity (11) to close the valve cavity (11), and the valve cavity (11) is provided with an air inlet hole (22) and an air outlet hole (23) relative to the secondary cavity (21), characterized in that: The auxiliary valve body (2) is provided with a piston rod (3), a pressure spring (31) and a piston sleeve (32), one end of the piston rod (3) is inserted into the gas outlet hole (23) of the main valve body (1), the other end extends into the piston sleeve (32), one end of the pressure spring (31) abuts against the piston sleeve (32), the other end abuts against the piston rod (3), the piston rod (3) is pushed to move close to the gas outlet hole (23), the auxiliary valve body (2) is provided with a knob (24) and an adjusting rod (25) driven by the knob (24) in a threaded manner, and the auxiliary valve body (2) is further provided with an electromagnetic mechanism (4), the electromagnetic mechanism (4) is powered to attract the piston sleeve (32) to move relative to the auxiliary valve body (2).

2. The pressure-controlled solenoid valve structure of an oxygen generator according to claim 1, characterized in that: The piston sleeve (32) is provided with a top spring (33), the top spring (33) is used to push the piston sleeve (32) to abut against the main valve body (1), so as to close the communication between the gas inlet hole (22) and the gas outlet hole (23), and the electromagnetic mechanism (4) is used to power the piston sleeve (32) to move away from the main valve body (1) to release the closure of the gas inlet hole (22) and the gas outlet hole (23).

3. The pressure-controlled solenoid valve structure of an oxygen generator according to claim 2, characterized in that: The piston sleeve (32) is further provided with a second sleeve (34), the pressure spring (31) abuts against the inner wall of the second sleeve (34) and the piston rod (3), and the pressure spring (31) is used to drive the piston rod (3) to close the gas outlet hole (23) by elastic force.

4. The pressure-controlled solenoid valve structure of an oxygen generator according to claim 3, characterized in that: The second sleeve (34) and the piston rod (3) are respectively provided with a contact (35) and a conductive sheet (36) on the opposite end faces, the contact (35) is electrically connected to the control circuit of the electromagnetic mechanism (4), and after the conductive sheet (36) conducts the contact (35) on the second sleeve (34), the current direction of the electromagnetic mechanism (4) is switched.

5. The pressure-controlled solenoid valve structure of an oxygen generator according to claim 4, characterized in that: The second sleeve (34) extends out of the piston sleeve (32) to abut against the end of the adjusting rod (25), the adjusting rod (25) is used as the core of the electromagnetic mechanism (4), and after the electromagnetic mechanism (4) is powered, the adjusting rod (25) is magnetized to attract the piston sleeve (32) to move close.

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