A proportional regulating device and a gas valve having the same

Abstract

The present invention provides a proportional adjustment device and a gas valve having the proportional adjustment device, comprising a magnet, a connecting piece and a sleeve, wherein the magnet is welded and fixed to the connecting piece, the magnet is provided with a first magnet through-hole, the connecting piece is provided with a step portion, the step portion is abutted against the end face of the magnet, the connecting piece further comprises a first section and a second section, part of the first section is located in the first magnet through-hole, the first section is gap-fitted with the inner wall portion where the first magnet through-hole is located, a gap is formed between the second section and the inner wall portion, the upper end portion of the sleeve extends into the gap, part of the second section is press-fitted into the interior of the sleeve, and the upper end portion of the sleeve is clamped between the inner wall portion and the sleeve.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic control or gas control, and in particular to a proportional adjustment device and a gas valve having the proportional adjustment device. Background Art

[0002] Gas valves are widely used in gas systems. The gas valve includes a proportional adjustment device, which includes a matching part and a magnet. The matching part and the magnet are generally fixedly connected by tightening screws. As a technician in this field, it is necessary to ensure the reliability of the connection between the various components as much as possible. Summary of the Invention

[0003] The main purpose of this application is to provide a ratio regulating device and a gas valve having the ratio regulating device;

[0004] A proportional adjustment device, characterized in that it includes a magnet, a connecting member and a sleeve, the magnet is welded and fixed to the connecting member, the magnet is provided with a first magnet through hole, the connecting member is provided with a guide portion, a first section portion and a second section portion, a step portion is formed between the guide portion and the first section portion, the step portion is against the upper end surface of the magnet, part of the first section portion is located in the first magnet through hole, the first section portion is gap-fitted with the inner wall portion where the first magnet through hole is located, a gap is formed between the second section portion and the inner wall portion, the upper end portion of the sleeve extends into the gap, the upper end portion of the sleeve is clamped between the inner wall portion and the sleeve, part of the second section portion is located in the sleeve and is fixedly connected or limit-connected to the sleeve. A gas valve comprises a valve body, the valve body being provided with a first valve port, a second valve port, a third valve port, a main valve port and a gas flow passage, and further comprising a safety electromagnetic drive device, a proportional adjustment device and a pressure differential adjustment device, the safety electromagnetic drive device comprising a main valve plug and a secondary valve plug, the main valve plug being able to approach or move away from the first valve port, the secondary valve plug being able to approach or move away from the second valve port, the proportional adjustment device comprising a diaphragm assembly, the diaphragm assembly being able to approach or move away from the third valve port, acting on the gas flow passage through the third valve port to affect the cache back pressure chamber of the pressure differential adjustment device, and the proportional adjustment device being the above-mentioned proportional adjustment device structure.

[0005] The present invention can relatively improve the connection reliability between various components of the proportional adjustment device by improving the structure of the proportional adjustment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 A cross-sectional view of the overall structure of the gas valve provided in this application;

[0007] Figure 2A cross-sectional view of the structure of the proportional adjustment device provided in this application;

[0008] Figure 3 This is a schematic diagram of the adjustment mechanism and the anti-loosening part provided in this application before they are engaged;

[0009] Figure 4 for Figure 3 A magnified schematic diagram of the adjustment mechanism DETAILED DESCRIPTION

[0010] It should be noted that this application optimizes the design of the structure of the proportional adjustment device, focusing on protecting the connecting parts, magnetic conductors, adjustment mechanisms and sleeve structures and the coordination between them. Other moving core components, static iron cores or coil structures can be adaptively improved according to customer or gas system requirements. This application only exemplifies that the electromagnetic drive device structure protected can be applied to the gas valve structure of the gas system. It should be noted that the application of the structure of this application in other products should also fall within the scope of protection of this application.

[0011] The first embodiment of the present invention is described in detail below with reference to the accompanying drawings. Figure 1 As shown, the present invention provides a gas valve, including a valve body, which is provided with an inlet 1a and an outlet 1b. The valve body 1 is further provided with a first valve port 101, a second valve port 102, a third valve port, i.e., a proportional adjustment valve port 103, a main valve port, and a gas flow channel 105. The valve body of the gas valve can be formed by die-casting of an aluminum alloy. The gas valve also includes a safety electromagnetic drive device 100, a proportional adjustment device 200, and a pressure difference adjustment device 300. The safety electromagnetic drive device 100 includes a main valve plug and a secondary valve plug. The main valve plug can approach or move away from the first valve port 101, and the secondary valve plug can approach or move away from the secondary valve plug 102. The safety electromagnetic drive device 100 is fixedly connected to the valve body 1 as a whole. The safety electromagnetic drive device 100 serves as a safety control device of the gas valve. To ensure the safety of gas use, when the first valve port 101 cannot be closed smoothly, the auxiliary valve plug can still close the second valve port 102. The proportional adjustment device 200 includes a diaphragm assembly, which can be close to or away from the third valve port 103. When the diaphragm assembly is relatively close to the third valve port 103, the gas pressure acting on the gas flow channel 105 increases, thereby acting on the buffer back pressure chamber 1A of the pressure difference adjustment device 300, so that the gas flow through the main valve port is relatively large; or when the diaphragm assembly is relatively far away from the third valve port 103, the gas pressure acting on the gas flow channel 105 is relatively reduced, thereby acting on the buffer back pressure chamber 1A of the pressure difference adjustment device 300, so that the gas flow through the main valve port 302 is relatively small, thereby realizing the regulation of the gas flow.

[0012] The following combination Figure 2 and Figure 4The proportional adjustment device provided by the present application is introduced in detail. The proportional adjustment device 200 includes a magnetizer 201 and a coil component. The coil component includes a coil and a skeleton 202. The coil is wound on the skeleton 202, and the coil component is press-fitted into the magnetizer 201 as a whole. The skeleton 202 is provided with a groove 2021. The magnetizer 201 includes an upper magnetizer, a lower magnetizer and a connecting portion. The upper magnetizer is provided with a protrusion 2011, and the protrusion 2011 protrudes toward the groove 2021. At least part of the protrusion 2011 is located in the groove 2021 to achieve better positioning between the magnetizer and the coil component to prevent the coil component from circumferentially displacing relative to the magnetizer, or the cooperation relationship between the two can also be interchangeable. For example, the upper magnetizer is provided with a groove, and the skeleton 202 is provided with a protrusion facing the upper magnetizer.

[0013] The proportional adjustment device also includes a connecting portion 203, which can be formed from a metal material, such as stainless steel. The connecting portion 203 includes a guide portion 2034, a first section 2031, a transition portion 2032, and a second section 2033. A step is formed between the guide portion 2034 and the first section 2031. The first section 2031 is located between the first section 2031 and the transition portion 2032. The transition portion 2032 is closer to the second section 2033 than the first section. The upper magnet of the magnet 201 is provided with a first magnet through hole, and the lower magnet is provided with a second magnet through hole. Part of the first section 2031 is located in the first magnet through hole. The outer peripheral surface of the first section 2031 is matched with a small gap between the inner wall of the first magnet through hole. The step portion is against the end face of the upper magnet so that part of the connecting portion 203 is exposed above the magnet 201. A gap S1 is formed between the connecting member 203 and the inner wall of the first magnet through hole. The gap S1 is approximately The transition portion 2032, the second section 2033 and the inner wall surface where the first magnetic conductor through hole is located are roughly defined. In this embodiment, the transition portion 2032 can be a conical surface segment structure that is easy to process. Part of the second section 2033 extends into the sleeve 204 and is press-fitted with the inner wall of the sleeve 204, or one can be provided with a protrusion and the other with a recess, and the two can be engaged to perform a limited connection. The lower end of the sleeve 204 is fixedly connected to the static iron core 208, and part of the sleeve 204 is clamped between the magnetic bushing and the The second section 2033 is located between the sleeve 204, and the upper end of the sleeve 204 extends into the gap S1 and is limited between the magnetizer 201 and the connector 203. The cross-sectional area of the transition portion 2032 near the second section is smaller than the cross-sectional area near the diameter. The upper end of the sleeve 204 abuts against the end of the transition portion 2032. After installation, the step portion and the end face of the upper magnetizer are fixed by welding in the area B1 where the step portion abuts against the end face. For example, laser welding, which is more beautiful and convenient, can be used for fixation.

[0014] Through the above arrangement, the connector 203 and the magnet 201 are directly welded by laser. Compared with the background technology of tightening the connector and the magnet by screws, the screws may become loose due to external vibration and other factors. It is more reliable to directly connect the two. In addition, one end of the sleeve 204 in the background technology is fixedly connected to the static iron core, and the other end is only located between the connector and the magnetic bushing. One side of the upper end of the sleeve 204 is a clearance fit with the magnetic bushing. When the proportional adjustment device is actuated, the dynamic core assembly 207 is frequently switched on and off by the electromagnetic force. When approaching or moving away from the static iron core 208, the moving iron core of the moving core assembly 207 slides along the inner wall of the sleeve 204 in the axial direction. Under frequent action, the sleeve 204 may be radially free, thereby affecting the actuation coaxiality and stability of the components. Through the above arrangement, the lower end of the sleeve 204 is fixedly connected to the static iron core, and the upper end of the sleeve 204 extends into the gap between the magnetizer and the connector, and is limited by the two, which relatively reduces the radial freeness of the sleeve and can relatively guarantee the actuation coaxiality and stability of each component.

[0015] The following combination Figure 2 and Figure 3 The adjustment mechanism 205 provided in the present application is introduced. The proportional adjustment device 200 also includes an adjustment mechanism 205. The connecting piece 203 is threadedly matched with the adjustment mechanism 205. The adjustment mechanism 205 is formed by metal material, such as stainless steel. The adjustment mechanism 205 includes an adjustment mechanism guide portion, a matching portion 2051, an external threaded portion 2052 threadedly matched with the internal threaded portion of the connecting piece 203, and an adjustment notch portion 2053. The adjustment mechanism matching portion and the second section 2033 are clearance-matched to facilitate the installation of the adjustment mechanism 205. The adjustment notch portion 2053 is matched with an external flat-blade screwdriver to adjust the initial pressure state. The upper end surface of the guide portion 2034 of the connecting piece 203 is not lower than the height of the upper end surface of the matching portion 2051. Through this setting, when the adjustment notch portion 2053 is adjusted by a special tool, the flat-blade screwdriver will not slide out of the adjustment notch portion 2053, thereby ensuring smooth adjustment of the initial pressure state. Figure 3The matching portion 2051 is provided with at least two matching holes 2055, and the proportional adjustment device 200 also includes an anti-loosening portion 400. The anti-loosening portion 400 can be formed by plastic material and has a roughly arc-shaped structure. The anti-loosening portion 400 is clamped between the inner peripheral wall of the guide portion 2034 and the matching portion 2051. The anti-loosening portion 400 includes a first anti-loosening portion 401 and a second anti-loosening portion 402. The first anti-loosening portion 401 and the second anti-loosening portion 402 are respectively provided with a first positioning portion 4012 and a second positioning portion 4021. At least a portion of the first positioning portion 4012 is located in the matching hole 2055, and at least a portion of the second positioning portion 4021 is located in the matching hole 2055, so that the first anti-loosening part 401 and the second anti-loosening part 402 are integrally installed on the matching part 2051. Through the threaded matching action, when the adjusting mechanism 205 is adjusted axially downward or axially online relative to the connecting member 203, the friction coefficient between the matching part 2051 and the inner wall of the guide part 2034 can be relatively reduced by adding the anti-loosening part 400 structure, so that the adjustment of the adjusting mechanism 205 is smoother, and in the case that the threaded matching between the adjusting mechanism and the connecting member 203 is loose, the existence of the anti-loosening part 400 can greatly reduce the situation where the adjusting structure is loosened as a whole relative to the connecting member and affects the initial pressure adjustment or actuation.

[0016] The present application provides a proportional adjustment device, including a magnet, a connecting piece and a sleeve. The magnet is welded and fixed to the connecting piece. The magnet is provided with a first magnet through-hole. The connecting piece is provided with a guide portion, a first section portion and a second section portion. A step portion is formed between the guide portion and the first section portion. The step portion is against the upper end surface of the magnet. The first section portion is roughly located between the guide portion and the second section portion. Part of the first section portion is located in the first magnet through-hole. The first section portion is gap-fitted with the inner wall portion where the first magnet through-hole is located. A gap is formed between the second section portion and the inner wall portion. The upper end portion of the sleeve extends into the gap. The upper end portion of the sleeve is clamped between the inner wall portion and the sleeve. Part of the second section portion is located in the sleeve and is fixedly connected or limit-connected to the sleeve.

[0017] The present application also provides a gas valve with the above-mentioned proportional adjustment device structure, including a valve body, the valve body is provided with a first valve port, a second valve port, a third valve port, a main valve port and a gas flow channel, and also includes a safety electromagnetic drive device, a proportional adjustment device and a pressure difference adjustment device. The safety electromagnetic drive device includes a main valve plug and a sub-valve plug. The main valve plug can approach or move away from the first valve port, and the sub-valve plug can approach or move away from the second valve port. The proportional adjustment device includes a diaphragm assembly. The diaphragm assembly can approach or move away from the third valve port, and act on the gas flow channel through the third valve port to affect the cache back pressure chamber of the pressure difference adjustment device.

[0018] Through the above arrangement, the connector 203 and the magnet 201 are directly welded by laser. Compared with the background technology of tightening the connector and the magnet by screws, the screws may become loose due to external vibration and other factors. It is more reliable to directly connect the two. In addition, one end of the sleeve 204 in the background technology is fixedly connected to the static iron core, and the other end is only located between the connector and the magnetic bushing. One side of the upper end of the sleeve 204 is a clearance fit with the magnetic bushing. When the proportional adjustment device is actuated, the dynamic core assembly 207 is frequently switched on and off by the electromagnetic force. When approaching or moving away from the static iron core 208, the moving iron core of the moving core assembly 207 slides along the inner wall of the sleeve 204 in the axial direction. Under frequent action, the sleeve 204 may be radially free, thereby affecting the actuation coaxiality and stability of the components. Through the above arrangement, the lower end of the sleeve 204 is fixedly connected to the static iron core, and the upper end of the sleeve 204 extends into the gap between the magnetizer and the connector, and is limited by the two, which relatively reduces the radial freeness of the sleeve and can relatively guarantee the actuation coaxiality and stability of each component.

[0019] It should be noted that the ordinal numbers such as "first, second" and the directional words such as "upper, lower" mentioned in the present invention are all described based on the drawings in the specification. They are only used to distinguish the naming methods of different components and should not be considered to have any restrictions on the order of the components. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A proportional adjustment device, characterized in that: The cam is secured to the cam face and has a first end, the second end, the second end, the second guide frame being secured to the cam face and the second guide frame being secured to the cam face. The connecting piece also includes a transition portion, which is located between the first section and the second section. The cross-sectional area of the transition portion close to the second section is smaller than the cross-sectional area close to the first section. The upper end of the sleeve abuts against the terminal necked end of the transition portion close to the second section.

2. The proportional adjustment device according to claim 1, characterized in that: The proportional adjustment device also includes an adjustment mechanism, which is threadedly engaged with the connecting piece. The adjustment mechanism includes an adjustment mechanism guide portion, a mating portion, and an adjustment notch portion. The adjustment mechanism guide portion is clearance-matched with the second section portion, and the adjustment notch portion can be engaged with an external flat-blade screwdriver. The guide portion of the connecting piece is located above the step portion, and the upper end surface height of the guide portion of the connecting piece is not lower than the height of the upper end surface of the mating portion.

3. According to the proportional adjustment device of claim 2, at least two matching holes are provided on the matching part, and the proportional adjustment device also includes an anti-loosening part, and the anti-loosening part is roughly an arc-shaped structure, and the anti-loosening part includes a first anti-loosening part and a second anti-loosening part, and the first anti-loosening part and the second anti-loosening part are respectively provided with a first positioning part and a second positioning part, and the first positioning part and the second positioning part are respectively located in the matching hole, and the anti-loosening part is clamped between the matching part and the inner peripheral wall of the guide part of the connecting member.

4. The proportional adjustment device according to any one of claims 1 to 3, characterized in that: The coil component includes a skeleton, which is press-fitted into the magnetic body. A groove is provided on the upper part of the skeleton. The magnetic body includes an upper magnetic body, which includes a protrusion facing the groove, and at least part of the protrusion is located in the groove.

5. The proportional adjustment device according to any one of claims 1 to 3, characterized in that: It also includes a coil component, the coil component includes a skeleton, the magnetic conductor includes an upper magnetic conductor, the upper magnetic conductor includes a groove, the upper end of the skeleton is provided with a protrusion facing the groove, and at least part of the protrusion is located in the groove.

6. The proportional adjustment device according to any one of claims 1 to 3, characterized in that: The connecting piece is formed from a metal material, and the connecting piece and the magnetic conductor are fixed by laser welding.

7. A gas valve, comprising a valve body, wherein the valve body is provided with a first valve port, a second valve port, a third valve port, a main valve port and a gas flow channel, and further comprising a safety electromagnetic drive device, a proportional adjustment device and a pressure differential adjustment device, wherein the safety electromagnetic drive device comprises a main valve plug and a secondary valve plug, wherein the main valve plug can approach or move away from the first valve port, and the secondary valve plug can approach or move away from the second valve port, and the proportional adjustment device comprises a diaphragm assembly, wherein the diaphragm assembly can approach or move away from the third valve port, and act on the gas flow channel through the third valve port to affect the cache back pressure chamber of the pressure differential adjustment device, and the proportional adjustment device is the proportional adjustment device structure described in claims 1-3.

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