CN113187946B - Double-disc spring type precision proportional valve for respirator - Google Patents
Double-disc spring type precision proportional valve for respirator Download PDFInfo
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- CN113187946B CN113187946B CN202110748566.2A CN202110748566A CN113187946B CN 113187946 B CN113187946 B CN 113187946B CN 202110748566 A CN202110748566 A CN 202110748566A CN 113187946 B CN113187946 B CN 113187946B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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Abstract
The invention discloses a double-disc spring type precision proportional valve for a respirator, which comprises an electromagnetic driving component, a sealing component and a main valve body with an air inlet part and an air outlet part, wherein an air valve is arranged between the air inlet part and the air outlet part of the main valve body, the electromagnetic driving component drives the sealing component to move so as to enable the air valve to realize different opening degrees, the electromagnetic driving component comprises a movable iron core and a static iron core, one end of the movable iron core is connected with the sealing component, the other end of the movable iron core is connected with the static iron core through a pressure spring, the pressure spring acts on the movable iron core to enable the sealing component at one end of the movable iron core to abut against the air valve, one end of the movable iron core, which is connected with the sealing component, is also connected with a lower disc spring, and one end of the movable iron core, which is connected with the static iron core, is also connected with an upper disc spring. The invention has good anti-interference capability, high stability and longer service life on the premise of considering fast dynamic frequency response.
Description
Technical Field
The invention relates to a proportional valve, in particular to a double-disc spring type precise proportional valve for a respirator.
Background
The new coronary epidemic situation prevails all over the world, the demand of medical breathing machines is increased, the breathing machine is one of the necessary rescue equipment of all hospitals, is important medical equipment for prolonging the life of a patient and striving for precious time for further treatment, one core in the high-end breathing machine is a proportional electromagnetic valve, although the domestic pneumatic technology industry starts late but develops rapidly, the research and development of conventional pneumatic elements have achieved remarkable performance in the aspects of research and development and production, the quality and performance of partial products reach the world advanced level, but the research and development of key pneumatic elements such as an electromagnetic proportional valve are relatively lagged, a plurality of researches still stay in the theoretical and laboratory stages, the working condition of a miniature proportional electromagnetic valve for the breathing machine is complex, the flow characteristic of the miniature proportional electromagnetic valve has the characteristics of nonlinearity, time variation and the like, one popular direction of the research of the proportional electromagnetic valve at present is a product with fast dynamic frequency response, and the flow control reaction of the breathing machine can be quicker, and the product that developments frequency response is fast often can't compromise stability, also has the relatively poor problem of interference killing feature for current proportional solenoid valve ubiquitous, and this while also can influence proportional solenoid valve's life, and the proportional solenoid valve that the restriction developments frequency response is fast is used in the high-end breathing machine more.
Disclosure of Invention
The invention aims to provide a double disc spring type precise proportional valve for a respirator. The invention has good anti-interference capability, high stability and longer service life on the premise of considering fast dynamic frequency response.
The technical scheme of the invention is as follows: two disc spring formula precision proportional valves for breathing machine, including electromagnetic drive subassembly, seal assembly, have the main valve body of the portion of admitting air and the portion of giving vent to anger, be equipped with the valve between the portion of admitting air of the main valve body and the portion of giving vent to anger, electromagnetic drive subassembly drives the seal assembly motion and makes the valve realize different apertures, the electromagnetic drive subassembly is including moving iron core and quiet iron core, the one end that moves the iron core is connected with seal assembly, and the other end that moves the iron core is connected with quiet iron core through the pressure spring, the pressure spring acts on and moves the iron core and makes the seal assembly of iron core one end support the valve, moves the iron core and connects seal assembly's one end still is connected with down the dish spring, moves the iron core and connects the one end of quiet iron core still is connected with the dish spring.
Compared with the prior art, the invention has the beneficial effects that: the two ends of the movable iron core are respectively connected with the upper disc spring and the lower disc spring, and the structure of the double disc springs enables the movable iron core to be subjected to four forces, namely pressure spring elasticity, electromagnetic force, upper disc spring elasticity and lower disc spring elasticity, when the electromagnetic driving assembly is electrified; compared with a single disc spring structure, the disc spring force and the electromagnetic force are both nonlinear forces, the single disc spring structure only applies two nonlinear forces to the movable iron core, the superposition of the disc spring force and the electromagnetic force needs to be matched as much as possible to realize the stress balance of the movable iron core, the nonlinear forces cannot be completely matched after being superposed and can be disturbed, the double disc spring structure can enable the movable iron core to be acted by three nonlinear forces, and compared with the single disc spring structure, the disc spring additionally arranged in the double disc spring structure is used for balancing the disturbance after the superposition of the single disc spring force and the electromagnetic force, so that the anti-interference performance and the transient stability of the double disc spring structure are improved, and finally, the double disc spring structure disclosed by the invention is stable in flow regulation, high in regulation precision and longer in service life.
In the double disc spring type precision proportional valve for a respirator, when the electromagnetic driving assembly is powered off, the resultant force direction of the upper disc spring and the lower disc spring acting on the movable iron core is opposite to the acting force direction of the pressure spring on the movable iron core.
In the double disc spring type precision proportional valve for the respirator, when the electromagnetic driving assembly is powered on, the movable iron core moves towards the static iron core end along with the increase of the power-on current, the resultant force of the upper disc spring and the lower disc spring acting on the movable iron core is gradually reduced to zero from the power-off state, and then is reversely and gradually increased.
In the aforementioned dual disc spring type precision proportional valve for a respirator, when the electromagnetic driving component is powered off, the direction of the acting force of the upper disc spring on the movable iron core is the same as the direction of the acting force of the lower disc spring on the movable iron core.
In the double disc spring type precision proportional valve for a respirator, when the electromagnetic driving assembly is powered on, along with the increase of the power-on current, the acting force of the upper disc spring on the movable iron core is gradually reduced, and the direction of the acting force is always opposite to the direction of the acting force of the pressure spring on the movable iron core.
In the double disc spring type precision proportional valve for the respirator, the static iron core is of a hollow structure and comprises a first sleeve, a second sleeve and a third sleeve which are sequentially sleeved from top to bottom, the third sleeve is connected with the main valve body, the movable iron core comprises an iron core main body arranged in the third sleeve, a guide pillar inserted into the hollow part of the first sleeve and the second sleeve is arranged at the top end of the iron core main body, and the bottom end of the iron core main body is connected with the sealing assembly through the sealing assembly seat; a plug is arranged in the first sleeve, one end of the pressure spring props against the plug, and the other end of the pressure spring props against the guide post; the upper surface and the lower surface of the upper disc spring respectively support against the pressure spring and the guide post, and the outer edge of the upper disc spring is fixed between the first sleeve and the second sleeve; the upper surface and the lower surface of the lower disc spring are respectively propped against the iron core main body and the sealing component seat, and the outer edge of the lower disc spring is fixed between the third sleeve and the main valve body.
In the double disc spring type precision proportional valve for the respirator, a first deformation space is formed between the bottom of the first sleeve and the top of the second sleeve, and a second deformation space is formed between the bottom of the iron core main body and the top of the sealing component seat.
In the double disc spring type precision proportional valve for a respirator, the lower disc spring is a structure obtained by amplifying the upper disc spring in equal proportion.
In the double disc spring type precision proportional valve for a respirator, the upper disc spring is of a circular sheet structure, a plurality of radial strip holes are formed in the upper disc spring, and auxiliary holes are formed between every two adjacent strip holes.
In the aforementioned two disc spring formula precision proportional valves for breathing machine, the cover has the coil sleeve outside the quiet iron core, the cover has the coil on the coil sleeve, the coil sleeve outside still is equipped with the coil magnetic conduction frame that is connected with quiet iron core.
Drawings
FIG. 1 is a sectional view of the internal structure of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is an enlarged view of a portion of FIG. 1 at B;
FIG. 4 is a schematic structural view of the upper disc spring;
FIG. 5 is a graph showing the variation of the force applied to the movable iron core of the present invention with the displacement thereof in the embodiment;
FIG. 6 is a graph showing the variation of the force applied to the movable iron core of the control group 2 with the displacement thereof in the embodiment;
FIG. 7 is a graph comparing the acceleration of the plunger with the change in current for the present invention and the control 2;
FIG. 8 is a graph comparing the current versus the displacement of the plunger of the present invention and control 2;
FIG. 9 is a graph comparing the incremental and decremental airflow changes of the current signal for the present invention and control 1.
Reference numerals: 1-an electromagnetic driving component, 2-a sealing component, 3-a main valve body, 4-a lower disc spring, 5-an upper disc spring, 6-a sealing component seat, 7-a first deformation space, 8-a second deformation space, 11-a movable iron core, 12-a static iron core, 13-a pressure spring, 14-a plug, 15-a coil sleeve, 16-a coil, 17-a coil magnetic conduction frame, 18-a magnet separation sheet, 31-an air inlet part, 32-an air outlet part, 33-a valve, 51-a strip hole, 52-an auxiliary hole, 111-an iron core main body, 112-a guide pillar, 121-a first sleeve, 122-a second sleeve, 123-a third sleeve and 1121-a convex.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Example (b): two disc spring formula precision proportional valves for breathing machine, the structure is shown in fig. 1-4, including electromagnetic drive subassembly 1, seal assembly 2, main valve body 3 that has inlet portion 31 and the portion 32 of giving vent to anger, be equipped with valve 33 between the inlet portion 31 of main valve body 3 and the portion 32 of giving vent to anger, electromagnetic drive subassembly 1 drives seal assembly 2 motion and makes valve 33 realize different apertures, electromagnetic drive subassembly 1 includes movable iron core 11 and quiet iron core 12, the one end of movable iron core 11 is connected with seal assembly 2, the other end of movable iron core 11 is connected with quiet iron core 12 through pressure spring 13, pressure spring 13 acts on movable iron core 11 and makes seal assembly 2 of movable iron core 11 one end support valve 33, the one end that movable iron core 11 connects seal assembly 2 still is connected with down disc spring 4, the one end that movable iron core 11 connects quiet iron core 12 still is connected with disc spring 5.
Preferably, the stationary iron core 12 is a hollow structure and comprises a first sleeve 121, a second sleeve 122 and a third sleeve 123 which are sequentially sleeved from top to bottom, the third sleeve 123 is connected with the main valve body 3, the movable iron core 11 comprises an iron core main body 111 arranged inside the third sleeve 123, a guide post 112 inserted into the hollow part of the first sleeve 121 and the second sleeve 122 is arranged at the top end of the iron core main body 111, and the bottom end of the iron core main body 111 is connected with the sealing assembly 2 through the sealing assembly seat 6; a plug 14 is arranged in the first sleeve 121, one end of the pressure spring 13 props against the plug 14, and the other end props against the guide post 112; the upper surface and the lower surface of the upper disc spring 5 respectively support against the pressure spring 13 and the guide post 112, and the outer edge of the upper disc spring 5 is fixed between the first sleeve 121 and the second sleeve 122; the upper and lower surfaces of the lower disc spring 4 respectively abut against the iron core main body 111 and the seal assembly seat 6, and the outer edge of the lower disc spring 4 is fixed between the third sleeve 123 and the main valve body 3.
Round holes are arranged at the centers of the upper disc spring 5 and the lower disc spring 4.
The guide post 112 and the iron core main body 111 are both cylindrical, the cylindrical diameter of the iron core main body 111 is larger, the guide post 112 is erected at the center of the upper surface of the iron core main body 111, a conical outward protrusion 1121 is arranged at the top of the guide post 112, the outward protrusion 1121 penetrates through a central circular hole of the upper disc spring 5 and is inserted into the pressure spring 13, so that the lower surface of the upper disc spring 5 abuts against the top area of the guide post 112 around the outward protrusion 1121, and the bottom of the pressure spring 13 abuts against the upper surface of the upper disc spring 5.
The hollow parts of the first sleeve 121, the second sleeve 122 and the third sleeve 123 are all cylindrical, wherein the diameters of the cylinders of the first sleeve 121 and the second sleeve 122 are relatively small and are larger than the diameter of the guide post 112, and the diameter of the cylinder of the third sleeve 123 needs to be larger and needs to be larger than the diameter of the iron core main body 111.
The second sleeve 122 has a step at the top, the outer edge of the upper disc spring 5 rests on the step, and the bottom of the first sleeve 121 cooperates with the step to press and fix the upper disc spring 5.
The air inlet part 31 of the main valve body 3 is of an inwards concave structure, the bottom of the third sleeve 123 is sleeved in the inwards concave part of the air inlet part 31 of the main valve body 3, a step is also arranged at the inwards concave part, the outer edge of the lower disc spring 4 is placed on the step, and the bottom of the third sleeve 123 is matched with the step to press and fix the lower disc spring 4.
Preferably, a first deformation space 7 is formed between the bottom of the first sleeve 121 and the top of the second sleeve 122, a second deformation space 8 is formed between the bottom of the core body 111 and the top of the seal assembly seat 6, and the first deformation space 7 and the second deformation space 8 are used for deformation of the upper disc spring 5 and the lower disc spring 4, respectively.
The first deformation space 7 is cylindrical, that is, the bottom of the first sleeve 121 and the top of the second sleeve 122 are both provided with a cylindrical groove to form the first deformation space 7.
The second deformation space 8 is formed because the bottom of the core body 111 and the top of the seal member seat 6 are both tapered structures, which provides some space for the deformation of the lower disc spring 4.
Preferably, the lower disc spring 4 is a structure in which the upper disc spring 5 is enlarged in equal proportion, the difference between the elastic forces provided by the upper disc spring 5 and the lower disc spring 4 for the movable iron core 11 is an order of magnitude, that is, the size of the lower disc spring 4 is larger, and the provided elastic force is larger, and the lower disc spring is mainly used for providing an assistance for the electromagnetic force when the power supply is started, so that the movable iron core 11 can start to move under the drive of smaller current, and the upper disc spring 5 is small in size and is mainly used for harmonizing disturbance generated after the subsequent superposition of the elastic force of the lower disc spring 4 and the electromagnetic force.
Preferably, the upper disc spring 5 is a circular sheet structure, a plurality of elongated holes 51 are arranged on the upper disc spring 5 along the radial direction, auxiliary holes 52 are arranged between adjacent elongated holes, and the plurality of elongated holes 51 are uniformly distributed and have 16 pieces.
The structure enables the upper disc spring 5 and the lower disc spring 4 to provide nonlinear elastic force in the deformation process, which is different from the deformation of a common cylindrical reed.
The upper disc spring 5 and the lower disc spring 4 are made of SUS304 materials.
The upper disc spring 5 and the lower disc spring 4 are both planar sheet-shaped structures in a normal state.
Preferably, a coil sleeve 15 is sleeved outside the static iron core 12, a coil 16 is sleeved on the coil sleeve 15, and a coil magnetic frame 17 connected with the static iron core 12 is further arranged outside the coil sleeve 15.
Preferably, a magnetic shield 18 is provided between the top of the core body 111 and the bottom of the first sleeve 121.
Preferably, a nut is screwed on the top of the first sleeve 121.
Preferably, sealing rings are provided between the plug 14 and the first sleeve 121, between the first sleeve 121 and the second sleeve 122, between the second sleeve 122 and the third sleeve 123, and between the third sleeve 123 and the main valve body 3, so as to improve the sealing property.
Preferably, the method comprises the following steps:
when the electromagnetic driving assembly 1 is powered off, the direction of the resultant force of the upper disc spring 5 and the lower disc spring 4 acting on the movable iron core 11 is opposite to the direction of the acting force of the pressure spring 13 on the movable iron core 11, as shown in fig. 1, the direction of the acting force of the pressure spring 13 on the movable iron core 11 is downward, and the direction of the resultant force of the upper disc spring 5 and the lower disc spring 4 acting on the movable iron core 11 is upward.
When the electromagnetic driving component 1 is powered on, the movable iron core 11 moves towards the end of the static iron core 12 along with the increase of the power-on current, the resultant force of the upper disc spring 5 and the lower disc spring 4 acting on the movable iron core 11 is gradually reduced to zero from the power-off state, and then is gradually increased in the opposite direction, when the electromagnetic force is small, the resultant force is upward, assistance is provided for the electromagnetic force, the spring force required to be overcome by the electromagnetic force is small, namely the movable iron core 11 can move upward faster under the drive of smaller current, and the sealing component 2 is opened at a corresponding speed.
The electromagnetic force increases slowly when starting, and pushes the movable iron core 11 slowly, so the spring force increases slowly, and the oscillation is more stable.
The acceleration oscillation time of the movable iron core 11 with the double disc spring structure is early, and the oscillation amplitude is small, so that the stable time of the movable iron core 11 is early, and the stable period is earlier, and the displacement of the movable iron core 11 is more stable.
When the electromagnetic force is large, the resultant force is downward to provide a certain resistance for the movement of the movable iron core 11, so that the oscillation of the movable iron core 11 is reduced, and after the current of the invention is reduced or the power is cut off, the dual-disc spring resultant force can give assistance to the compression spring 13, so that the movable iron core 11 can move downward faster, and the flow can be adjusted or the valve 33 can be closed faster.
The displacement of the movable iron core 11 reaches dynamic balance in the process of continuous oscillation of the acceleration, and the double disc springs play a role in alleviating the process.
Furthermore, when the electromagnetic driving assembly 1 is powered off, the acting force of the upper disc spring 5 on the movable iron core 11 is in the same direction as the acting force of the lower disc spring 4 on the movable iron core 11, that is, the upper disc spring 5 and the lower disc spring 4 both deform downward and both give upward acting force to the movable iron core 11.
Furthermore, when the electromagnetic driving assembly 1 is powered on, along with the increase of the power current, the acting force of the upper disc spring 5 on the movable iron core 11 gradually decreases, and the direction of the acting force of the pressure spring 13 on the movable iron core 11 is always kept opposite to the direction of the acting force of the pressure spring 13 on the movable iron core 11, that is, the acting force of the upper disc spring 5 on the movable iron core 11 is always upward and slowly decreases, and then according to the power on of the electromagnetic driving assembly 1, the change of the resultant force of the upper disc spring 5 and the lower disc spring 4 can deduce that the acting force of the lower disc spring 4 on the movable iron core 11 is upward at first, along with the increase of the current, the acting force gradually decreases to zero, and is reversely increased after zero, that is, the downward acting force of the lower disc spring 4 on the movable iron core 11 is given by upward deformation, and slowly increases.
To illustrate the technical effects of the present invention, the present invention is compared with two comparison groups, wherein the comparison group 1 is a proportional valve of the present invention with the upper disc spring 5 removed and other structures reserved, and the comparison group 2 is a proportional valve of the present invention with the upper disc spring 5 and the lower disc spring 4 removed and other structures reserved.
The variation relationship between the stress condition of the movable iron core 11 and the displacement thereof in the invention and the comparison group 2 is respectively shown in fig. 5 and fig. 6, the disc spring force in fig. 5 is the resultant force of the double disc springs, and it can be seen from fig. 5 that: due to the introduction of the disc spring force, the electromagnetic force changes in a nonlinear manner, and when the displacement of the movable iron core 11 is 0, the disc spring force already provides a positive acting force for the movable iron core 11.
Fig. 7 is a graph comparing the acceleration of the movable iron core 11 with the current of the invention and the comparison group 2, and it can be seen from fig. 7 that: due to the introduction of the disc spring force, the proportional valve with the double disc spring structure generates acceleration oscillation within shorter response time, namely the proportional valve with the double disc spring structure starts to move within shorter response time, and the acceleration oscillation is small, so that the stability of the invention is higher when the movable iron core 11 moves.
Fig. 8 is a graph comparing the displacement of the movable iron core 11 of the present invention and the comparison group 2 with the current, and it can be seen from fig. 8 that: due to the introduction of the disc spring force, the proportional valve with the double disc spring structure can generate displacement when inputting a smaller current signal, and in the interval of the movable iron core 11 with displacement, the current change range of the invention is larger, namely the current adjustable range is larger, which shows that the displacement of the movable iron core 11 is more stable along with the adjustment of the current when the invention is used, and the adjustment precision is higher.
FIG. 9 is a graph comparing the incremental and decremental changes in air flow with current signal for the present invention and control 1, and the data is collected as follows:
as can be seen from FIG. 9 and the collected data, the air flow of the proportional valve of the present invention and the air flow of the proportional valve of the comparison group 1 are within substantially the same variation range (the flow adjustment range of the present invention is 0-18.8slpm, the flow adjustment range of the comparison group 1 is 0-19.9 slpm), and the curve of the present invention is smoother with the variation of the current signal no matter the air flow is adjusted smaller or larger, which means that the adjustable range of the current signal of the proportional valve adopting the double disc spring structure is larger (when the current signal is increased, the present invention can adjust the air flow within the range of 190 mA and 380mA of the current signal, while the comparison group 1 can only adjust the air flow within the range of 200 mA and 300mA of the current signal; when the current signal is decreased, the present invention can adjust the air flow within the range of 160 mA of the current signal and 380mA of the comparison group 1 can only adjust the air flow within the range of 150 and 230mA of the current signal), namely, the air flow is more stable along with the adjustment of the current signal when the invention is used, the adjustment precision is higher, and the advantages after the upper disc spring 5 is added are reflected.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned examples, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (9)
1. Accurate proportional valve of two disc spring formulas for breathing machine, including electromagnetic drive subassembly (1), seal assembly (2), main valve body (3) that have portion of admitting air (31) and portion of giving vent to anger (32), be equipped with valve (33) between portion of admitting air (31) and the portion of giving vent to anger (32) of main valve body (3), electromagnetic drive subassembly (1) drives seal assembly (2) motion makes valve (33) realize different apertures, its characterized in that: the electromagnetic driving assembly (1) comprises a movable iron core (11) and a static iron core (12), one end of the movable iron core (11) is connected with a sealing assembly (2), the other end of the movable iron core (11) is connected with the static iron core (12) through a pressure spring (13), the pressure spring (13) acts on the movable iron core (11) to enable the sealing assembly (2) at one end of the movable iron core (11) to abut against a valve (33), one end of the movable iron core (11) connected with the sealing assembly (2) is also connected with a lower disc spring (4), and one end of the movable iron core (11) connected with the static iron core (12) is also connected with an upper disc spring (5);
the static iron core (12) is of a hollow structure and comprises a first sleeve (121), a second sleeve (122) and a third sleeve (123) which are sequentially sleeved from top to bottom, the third sleeve (123) is connected with the main valve body (3), the movable iron core (11) comprises an iron core main body (111) arranged in the third sleeve (123), a guide pillar (112) inserted into the hollow part of the first sleeve (121) and the second sleeve (122) is arranged at the top end of the iron core main body (111), and the bottom end of the iron core main body (111) is connected with the sealing assembly (2) through a sealing assembly seat (6); a plug (14) is arranged in the first sleeve (121), one end of the pressure spring (13) is propped against the plug (14), and the other end of the pressure spring is propped against the guide post (112); the upper surface and the lower surface of the upper disc spring (5) are respectively propped against the pressure spring (13) and the guide post (112), and the outer edge of the upper disc spring (5) is fixed between the first sleeve (121) and the second sleeve (122); the upper surface and the lower surface of the lower disc spring (4) are respectively propped against the iron core main body (111) and the sealing component seat (6), and the outer edge of the lower disc spring (4) is fixed between the third sleeve (123) and the main valve body (3).
2. A double disc spring type precision proportional valve for a respirator according to claim 1, wherein: when the electromagnetic driving assembly (1) is powered off, the direction of the resultant force of the upper disc spring (5) and the lower disc spring (4) acting on the movable iron core (11) is opposite to the direction of the acting force of the pressure spring (13) on the movable iron core (11).
3. A double disc spring type precision proportional valve for a respirator according to claim 2, wherein: when the electromagnetic driving assembly (1) is electrified, the movable iron core (11) moves towards the end of the static iron core (12) along with the increase of the electrified current, the resultant force of the upper disc spring (5) and the lower disc spring (4) acting on the movable iron core (11) is gradually reduced to zero from the state of power failure, and then is reversely and gradually increased.
4. A double disc spring type precision proportional valve for a respirator according to claim 3, wherein: when the electromagnetic driving assembly (1) is powered off, the acting force of the upper disc spring (5) on the movable iron core (11) is in the same direction as the acting force of the lower disc spring (4) on the movable iron core (11).
5. The dual disc spring precision proportioning valve of claim 4 wherein: when the electromagnetic driving assembly (1) is electrified, along with the increase of the electrified current, the acting force of the upper disc spring (5) on the movable iron core (11) is gradually reduced, and the direction of the acting force is always opposite to the direction of the acting force of the pressure spring (13) on the movable iron core (11).
6. A double disc spring type precision proportional valve for a respirator according to claim 1, wherein: a first deformation space (7) is formed between the bottom of the first sleeve (121) and the top of the second sleeve (122), and a second deformation space (8) is formed between the bottom of the iron core main body (111) and the top of the sealing component seat (6).
7. A double disc spring type precision proportional valve for a respirator according to any one of claims 1 to 5, wherein: the lower disc spring (4) is in a structure that the upper disc spring (5) is amplified in equal proportion.
8. A double disc spring precision proportioning valve for a respirator according to claim 7 wherein: the upper disc spring (5) is of a circular sheet structure, a plurality of radial strip holes (51) are formed in the upper disc spring (5), and auxiliary holes (52) are formed between every two adjacent strip holes.
9. A double disc spring type precision proportional valve for a respirator according to any one of claims 1 to 5, wherein: the outer side of the static iron core (12) is sleeved with a coil sleeve (15), a coil (16) is sleeved on the coil sleeve (15), and a coil magnetic conduction frame (17) connected with the static iron core (12) is further arranged on the outer side of the coil sleeve (15).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110748566.2A CN113187946B (en) | 2021-07-02 | 2021-07-02 | Double-disc spring type precision proportional valve for respirator |
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| CN202110748566.2A CN113187946B (en) | 2021-07-02 | 2021-07-02 | Double-disc spring type precision proportional valve for respirator |
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| CN113187946B true CN113187946B (en) | 2021-09-07 |
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2021
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| US3441246A (en) * | 1965-07-24 | 1969-04-29 | Danfoss As | Electromagnetic valve |
| CN2856614Y (en) * | 2005-12-27 | 2007-01-10 | 北京七星华创电子股份有限公司 | Electromagnetic regulation valve for quality flow controller |
| CN103899784A (en) * | 2012-12-25 | 2014-07-02 | 浙江三花股份有限公司 | Diaphragm type solenoid valve |
| CN110778770A (en) * | 2018-07-31 | 2020-02-11 | 浙江三花智能控制股份有限公司 | Gas proportional valve and electromagnetic driving device thereof |
| CN212107119U (en) * | 2020-04-09 | 2020-12-08 | 绍兴特龙电气有限公司 | Proportional valve structure |
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| CN113187946A (en) | 2021-07-30 |
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