Electromagnetic type gas flow regulating valve

Abstract

According to the technical scheme, the electromagnetic type gas flow regulating valve is characterized by comprising a valve body, a valve seat located at the gas outlet end, a reset piston located at the gas inlet end and a permanent magnetic valve clack which is located between the valve seat and the reset piston and can move and rotate are arranged in the valve body, and the reset piston is of a conical structure internally provided with a fluid channel; the small end of the conical structure right faces the valve seat, the small end of the conical structure abuts against the permanent magnetic valve clack, the large end of the reset piston abuts against a reset spring, and the reset spring drives the reset piston to move towards the valve seat and enables the permanent magnetic valve clack to abut against the valve seat. A magnetic field assembly is arranged in the valve body and drives the permanent magnetic valve clack to move and deflect so that the permanent magnetic valve clack can be separated from the valve seat. The opening degree of the valve is controlled by changing the magnitude of current, the flow can be controlled to be minimum, and remote control can be achieved without an electric actuator.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, more particularly to an electromagnetic gas flow regulating valve. BACKGROUND

[0002] Traditional gas flow regulating valves usually select ball valves or stop valves, but ball valves or stop valves have a defect that the flow is either very small or relatively large at a small opening, for example, a gas stove used every day needs to adjust the gas flow at all times, if a very small flame is needed to slow cook soup, even if the knob is turned to the smallest position, the result is that the flame is still large or there is no gas amount and the flame is extinguished, and the manual knob cannot achieve remote control. Although the traditional electric type gas flow regulating valve can achieve remote control, it still relies on electric power to drive the mechanical type actuator to act, and the electric actuator has a problem of very short service life due to frequent switching.

[0003] Therefore, there is an urgent need for a gas flow regulating valve that can avoid the dead zone problem of traditional flow regulating valves and solve the service life problem of traditional electric type gas flow regulating valves, ensuring the safety and reliability of the gas supply system and allowing the gas amount to be changed at will. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides an electromagnetic gas flow regulating valve that controls the opening of the valve by changing the current size, which can control the flow to be the smallest and can achieve remote control without an electric actuator.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an electromagnetic gas flow regulating valve, comprising a valve body, a valve seat located at an outlet end, a reset piston located at an inlet end, and a permanent magnetic valve disc movably and rotatably located between the valve seat and the reset piston, the reset piston is in a conical structure with a fluid passage in the interior, the small end of the conical structure is opposite to the valve seat and abuts against the permanent magnetic valve disc, the large end of the reset piston is provided with a reset spring, the reset spring drives the reset piston to move towards the valve seat and makes the permanent magnetic valve disc abut against the valve seat; a magnetic field assembly is arranged in the valve body, the magnetic field assembly drives the permanent magnetic valve disc to move and deflect to realize the separation of the permanent magnetic valve disc and the valve seat.

[0006] The present application is further provided as follows: the magnetic field assembly comprises a first soft magnet and a second soft magnet arranged at the valve seat and the reset piston, and the two ends of the first soft magnet and the second soft magnet are respectively provided with a bevel structure and a plane structure.

[0007] The present application is further provided as follows: the bevel structure of the first soft magnet is arranged to be inclined from top to bottom in a direction away from the permanent magnetic valve disc.

[0008] The application is further configured that the magnetic field assembly comprises a coil connected with an external direct current power supply, the coil is wound outside the valve body and corresponds to the positions of the first soft magnet and the second soft magnet; and the coil is externally provided with a shell sealing the coil inside.

[0009] The application is further configured that a groove is arranged between the valve seat and the valve body, and the first soft magnet is arranged in the groove.

[0010] The application is further configured that the second soft magnet is mounted on the valve body at the side of the reset piston and the reset spring.

[0011] The application is further configured that the second soft magnet is arranged as a downstream end near the gas outlet end of the valve seat and as an upstream end at the other end, and the reset piston and the reset spring are arranged at the downstream end and the upstream end respectively.

[0012] The application is further configured that the upstream end is provided with a necked step, the reset spring is abutted between the necked step and the reset piston, and the inner wall of the downstream end is sealingly and slidingly matched with the reset piston.

[0013] The application is further configured that a main flow channel is arranged in the valve body, the main flow channel is provided with a sliding groove, the rotating center of the permanent magnetic valve flap is rotationally provided with a connecting pin, and the connecting pin is slidingly arranged in the sliding groove.

[0014] The application is further configured that the small end of the reset piston abutting against the permanent magnetic valve flap is provided with a boss structure.

[0015] In summary, the application has the following beneficial effects:

[0016] The application can change the magnetic field strength of the magnetic field assembly by changing the size of the coil current, and the moving distance and the rotating angle of the permanent magnetic valve flap can be changed accordingly, so as to change the gap area between the main flow channel of the valve body and the permanent magnetic valve flap to achieve the purpose of adjustable gas flow. Since the difference between the diameter of the main flow channel of the valve body and the outer diameter of the permanent magnetic valve flap can be artificially made to be the smallest, when the current passing through the coil is the smallest, the rotating angle of the permanent magnetic valve flap is also the smallest, the gap between the main flow channel and the permanent magnetic valve flap is also the smallest, and the gas flow passing through the gap is also the smallest. In this way, the flow is controlled, which not only solves the problem of extremely short service life of the electric actuator of the traditional electric type gas flow regulating valve due to frequent switching, but also solves the problem of stepping into the regulating dead zone of the traditional manual type and electric type gas flow regulating valve in the case of extremely small gas flow.

[0017] The application has novel design, clear principle, convenient use, no any vulnerable parts, very high technical index, and reliable durability BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 This is a schematic diagram of a flow control valve.

[0019] Figure 2 This is a schematic diagram of the flow control valve when it is open.

[0020] Figure 3 This is a schematic diagram of the air outlet structure.

[0021] Figure 4 This is a schematic diagram of the second soft magnet structure.

[0022] Figure 5 This is a schematic diagram of the first soft magnet structure.

[0023] Figure 6 This is a schematic diagram of the reset piston structure.

[0024] Figure 7 A schematic diagram of the structure that forms a magnetic field for the first soft magnet and the second soft magnet valve.

[0025] Figure 8 This is a schematic diagram of a permanent magnetic valve disc under torque.

[0026] Figure 9 This is a schematic diagram showing the effect of gravity on a permanent magnetic valve disc when the tilt angle is 30 degrees.

[0027] Reference numerals: 1-Valve body; 10-Valve seat; 11-DC power supply; 12-Groove; 13-Annular concave surface; 14-Annular plane; 15-Elliptical plane; 16-Boss structure; 17-Downstream end; 18-Upstream end; 19-Main channel; 191-Sliding groove; 2-Outer shell; 3-First soft magnet; 4-Second soft magnet; 5-Coil; 6-Permanent magnetic valve disc; 61-Sliding pin; 7-Sealing gasket; 8-Reset spring; 9-Reset piston. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] This embodiment discloses an electromagnetic gas flow regulating valve. The valve body 1 has two ends connected via threaded structures or other existing connection methods to a gas supply pipeline and a device or apparatus requiring gas flow regulation, respectively. Figures 1-2As shown, the valve body 1, the gas enters the valve body 1 from right to left, the valve body 1 is provided with a valve seat 10 at the gas outlet end, a reset piston 9 at the gas inlet end and a movable and rotating permanent magnetic valve flap 6 between the two, the reset piston 9 is provided as a conical structure with a fluid passage inside, the small end of the conical structure is opposite to the valve seat 10 and abuts against the permanent magnetic valve flap 6, the large end of the reset piston 9 abuts against a reset spring 8, the reset spring 8 drives the reset piston 9 to move towards the valve seat 10 and makes the permanent magnetic valve flap 6 abut against the valve seat 10; the valve body 1 is provided with a magnetic field assembly, the magnetic field assembly drives the permanent magnetic valve flap 6 to move and deflect to realize the separation of the permanent magnetic valve flap 6 and the valve seat 10. Through the above structure, as shown in Figure 1 , in the normal state, the permanent magnetic valve flap 6 is abutted against the valve seat 10 by the reset spring 8 and the reset piston 9 to realize the closing of the valve body 1, in order to ensure the sealing effect, the permanent magnetic valve flap 6 is provided with a sealing gasket 7 made of sealing material to increase the sealing property. As shown in Figure 2 , when the magnetic field assembly generates a specific magnetic field, the permanent magnetic valve flap 6 not only leaves the valve seat 10 under the action of the magnetic field, but also rotates under the action of the magnetic field, so that the valve body 1 is in an open state, the gas enters the device or equipment requiring to adjust the gas flow along the flow direction shown by the arrow through the gap between the main flow passage 19 of the valve body 1 and the permanent magnetic valve flap 6. By changing the magnetic field strength of the magnetic field assembly, the rotation angle of the permanent magnetic valve flap 6 can be changed, so as to change the gap area to achieve the purpose of adjustable gas flow. Through this way, the magnetic field is directly controlled to realize sensitive adjustment without dead zone and without the need of mechanical electric actuator control, so the service life is effectively prolonged.

[0030] Further specific structure, the magnetic field assembly includes a first soft magnetic iron 3 and a second soft magnetic iron 4 arranged at the valve seat 10 and the reset piston 9, the opposite ends of the first soft magnetic iron 3 and the second soft magnetic iron 4 are respectively provided as a bevel structure and a plane structure. Referring to Figures 4-5 and Figure 7 , in the embodiment, the first soft magnetic iron 3 is provided as an N pole and the second soft magnetic iron 4 is provided as an S pole, the direction of the magnetic field is formed from the N pole to the S pole. The structure of the first soft magnetic iron 3 is shown in Figure 5 , which is a bevel cylindrical structure, when installed, the bevel structure of the first soft magnetic iron 3 is arranged to be inclined from top to bottom in the direction away from the permanent magnetic valve flap 6, the second soft magnetic iron 4 is a cylindrical structure, thereby a magnetic field with different strengths can be formed between the N pole and the S pole, so that the permanent magnetic valve flap 6 not only leaves the valve seat 10 under the action of the magnetic field, but also rotates under the action of the magnetic force with different strengths.

[0031] For further details, please refer to Figures 1-2The magnetic field assembly further comprises a coil 5 connected with the external DC power source 11, the valve body 1 is made of non-magnetic material, the coil 5 is wound outside the valve body 1 and corresponds to the positions of the first soft magnetic iron 3 and the second soft magnetic iron 4; the coil 5 is externally provided with a shell 2 which seals the coil 5 inside. Before the coil is powered, the gas under pressure enters the valve body 1 along the arrow direction, and under the action of the gas pressure and the reset spring, the valve is in the closed state. After the coil is powered, the N-pole of the first soft magnetic iron generates magnetism, and the S-pole of the second soft magnetic iron also generates magnetism, so that a magnetic field with different strengths is formed between the N-pole and the S-pole.

[0032] Further referring to Figure 3 and Figure 5 , a groove 12 is arranged between the valve seat 10 and the valve body 1, the groove 12 is arranged as a U-shaped groove, the inner side of the groove 12 is a circular annular concave surface 13, the inner end of the first soft magnetic iron 3 is a circular annular plane 14, the circular annular plane 14 and the circular annular concave surface 13 just overlap together, so that the first soft magnetic iron 3 is clamped in the groove 12. In this way, the firmness and stability of the first soft magnetic iron 3 are ensured.

[0033] Further, referring to Figures 1-2 , Figure 4 and Figure 6 , the second soft magnetic iron 4 is installed on the valve body 1 at the side of the reset piston 9 and the reset spring 8. And the second soft magnetic iron 4 is arranged as a downstream end 17 close to the gas outlet end of the valve seat 1, and the other end is arranged as an upstream end 18, the reset piston 9 and the reset spring 8 are arranged at the downstream end 17 and the upstream end 18 respectively. A necked step is arranged at the upstream end 18, the reset spring 8 abuts between the necked step and the reset piston 9; the inner wall of the downstream end 17 is sealed and slidingly fitted with the reset piston 9. At the same time, a boss structure 16 is arranged at the small end of the reset piston 9 abutting against the permanent magnetic valve flap 6, which ensures smooth abutment against the permanent magnetic valve flap 6 and does not interfere with the rotation of the permanent magnetic valve flap 6.

[0034] Further, referring to Figure 2 , in order to realize the movement and rotation of the permanent magnetic valve flap 6, a main flow channel 19 is arranged in the valve body 1, the main flow channel 19 is provided with a sliding groove 191, and the rotating center of the permanent magnetic valve flap 6 is provided with a connecting pin 61, the connecting pin 61 is slidingly arranged in the sliding groove 191. Therefore, the connecting pin 61 of the permanent magnetic valve flap 6 can slide in the sliding groove 191, and at the same time the permanent magnetic valve flap 6 can rotate around the connecting pin 61 as the rotating center.

[0035] The following examples further illustrate a specific embodiment of the application with a specification DN15, for the purpose of understanding. It should be noted that the following description is only a simple expression of the principle and does not represent the parameters in actual application. In order to facilitate calculation, the friction of the rotating shaft is ignored in the description process.

[0036] The formula for magnetic flux density is: B = μ0nI, where μ is the permeability of free space. Let n be the number of turns in the coil, and I be the current (A). If n = 200 and the minimum current I = 1A, then the magnetic flux density B = μ0nI = 4 × 3.14 × 10⁻⁶. -7 ×200×1=2.512×10 -4 (T)

[0037] like Figure 8 As shown, the formula for calculating the torque generated by the electromagnetic field on the rotatable permanent magnetic valve disc is: τ = mB sinθ, where the magnetic moment of the permanent magnet is m = 0.5 (A·m). 2 Let θ be the angle of inclination of the N pole of the soft magnet, assuming θ = 30°. The torque τ = mB sinθ = 0.5 × 2.5 × 12 × 10⁻⁶ -4 ×0.5=6.28×10 -5 (N·m).

[0038] like Figure 9 As shown, the weight of the valve disc is G = 3.4 × 10⁻⁶. -2 (N), the counter-torque generated by gravity on the valve disc

[0039] Under the action of minimum current, the torque τ generated by the electromagnetic field on the rotatable permanent magnetic valve disc is greater than the counter-torque δ generated by the valve disc due to gravity, that is, τ>δ. This indicates that the magnetic force has sufficient torque to ensure that the valve is in the minimum open state. At this time, the valve opening is the smallest and the flow of gas is also the smallest.

[0040] The novel electromagnetic flow regulating valve provided by this invention has the following significant advantages:

[0041] With its novel design, clear principle, and ease of use, the return spring can be made of stainless steel. It has no easily damaged parts, boasts very high technical specifications, and is reliable and durable.

[0042] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present invention should be included within the protection scope of the present invention.

Claims

1. An electromagnetic gas flow regulating valve comprising a valve body (1), characterized in that: The valve body (1) is provided with a valve seat (10) at the outlet end, a reset piston (9) at the inlet end, and a movable and rotatable permanent magnetic valve flap (6) between the two, the reset piston (9) is provided with a conical structure with a fluid channel inside, the small end of the conical structure is opposite to the valve seat (10) and abuts against the permanent magnetic valve flap (6), the large end of the reset piston (9) abuts against a reset spring (8), the reset spring (8) drives the reset piston (9) to move towards the valve seat (10) and makes the permanent magnetic valve flap (6) abut against the valve seat (10); the valve body (1) is provided with a magnetic field assembly, which drives the permanent magnetic valve flap (6) to move and deflect, so as to separate the permanent magnetic valve flap (6) from the valve seat (10).

2. The electromagnetic gas flow regulating valve according to claim 1, characterized in that: The magnetic field assembly includes a first soft magnet (3) and a second soft magnet (4) arranged at the valve seat (10) and the reset piston (9), the opposite ends of the first soft magnet (3) and the second soft magnet (4) are provided with a bevel structure and a plane structure respectively.

3. An electromagnetic gas flow regulating valve according to claim 2, characterized in that: The bevel structure of the first soft magnet is arranged to be inclined from top to bottom away from the permanent magnetic valve flap (6).

4. The electromagnetic gas flow regulating valve according to claim 2, wherein: The magnetic field assembly includes a coil (5) connected with an external DC power supply, the coil (5) is wound outside the valve body (1) and corresponds to the positions of the first soft magnet (3) and the second soft magnet (4); the coil (5) is provided with an outer shell (2) sealing it inside.

5. The electromagnetic gas flow regulating valve according to claim 2, wherein: The valve seat (10) and the valve body (1) are provided with a groove (12), and the first soft magnet (3) is arranged in the groove (12).

6. The electromagnetic gas flow regulating valve according to claim 2, wherein: The second soft magnet (4) is mounted on the valve body (1) around the reset piston (9) and the reset spring (8).

7. An electromagnetic gas flow regulating valve according to claim 6, characterized in that: The second soft magnet (4) is arranged as a downstream end (17) near the outlet end of the valve seat (1) and an upstream end (18) at the other end, and the reset piston (9) and the reset spring (8) are arranged at the downstream end (17) and the upstream end (18) respectively.

8. An electromagnetic gas flow regulating valve according to claim 7, characterized in that: The upstream end (18) is provided with a necked step, and the reset spring (8) abuts between the necked step and the reset piston (9); the inner wall of the downstream end (17) is sealed and slidingly fitted with the reset piston (9).

9. The electromagnetic gas flow regulating valve according to claim 1, wherein: The valve body (1) is provided with a main flow channel (19), the main flow channel (19) is provided with a sliding groove (191), and the rotation center of the permanent magnetic valve flap (6) is rotatably provided with a connecting pin (61), and the connecting pin (61) is slidingly arranged in the sliding groove (191).

10. The electromagnetic gas flow regulating valve according to claim 1, wherein: The small end of the reset piston (9) abutting against the permanent magnetic valve flap (6) is provided with a boss structure (16).

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