TWM586781U - Gas solenoid valve bypass adjustment structure - Google Patents

Abstract

This creation is a bypass adjustment structure for a gas solenoid valve. The gas solenoid valve is provided on the gas supply line of a combustion appliance, and includes a valve provided between an upstream air inlet end and a downstream air outlet end, and a drive by electromagnetic action. For the valve plug that closes or opens the valve, the bypass adjusting structure includes a bypass hole that connects the upstream intake end and the downstream outlet end, and an adjustment screw that is disposed at one end of the bypass hole with an adjustable interval. When the valve plug closes the valve to block the gas, the bypass hole can allow small flow gas to be released to the burner from the upstream inlet end to the downstream outlet end to prevent flameout, and the user or manufacturer can also The fine flow of the adjusting screw is used to control the minimum flow rate or shut it down to adapt to a variety of different burners.

Description

Gas solenoid valve bypass adjustment structure

This creation is a bypass adjustment structure for a gas solenoid valve. The gas solenoid valve is installed on the gas supply line of a gas appliance. The bypass adjustment structure is designed to provide a minimum flow of gas when the gas solenoid valve closes the valve. Release to the burner to maintain low fire and prevent flameout, and turn it off when not in use.

Generally, when using gas appliances such as stoves, water heaters or fireplaces, it is often necessary to keep the appliances at a minimum fire state for heat preservation or low-fire heating. For example, when using a gas cooker to cook food, after using a large fire to cook the food to a stage, you need to adjust the gas cooker to a minimum fire to avoid overheating, and use a small fire to maintain the food temperature; for example, turn on the gas After the water heater quickly raises the water temperature, it is necessary to reduce the heat to maintain the water temperature at an appropriate temperature.

However, during the use of the above-mentioned small fire, a situation often encountered is that the flame is suddenly turned off, resulting in the user having to switch the ignition on and off again to adjust the required firepower. For example, when bathing in summer, traditional gas water heaters can adjust the hot water flow to control the amount of firepower to avoid overheating, but if the hot water flow is adjusted too small, it may cause the gas water heater to suddenly stop and the user The hot water flow must be turned back on to the maximum to reignite, and the water temperature will slowly recover. For another example, when the user uses the knob to adjust the gas stove to the minimum fire, a little carelessness will cause the knob to rotate too much and cause the flame to go out. At this time, the user must also turn the knob again to ignite to continue using it. Sometimes The re-ignition step must be repeated several times, which is quite inconvenient to use.

After research, the above-mentioned various unburned states of various combustion appliances are mainly due to the fact that, in addition to the main control valve or the flow control valve, a switching solenoid valve is additionally provided on the gas supply pipeline, and the switching solenoid valve is used to form a second Road strengthens the safety valve to prevent gas leakage, but in this way, when the firepower of the burning appliance is too small and the system misjudges, although the main control valve or flow regulating valve is still open, the switch solenoid valve will still close without warning. For example, the on-off solenoid valve for a gas cooker is linked to a thermocouple. When the firepower is too small and the thermocouple is misjudgment, the on-off solenoid valve will still have no warning even though the main control valve or the flow control valve is still open at a small flow. Shut down, causing inconvenience such as the user having to re-ignite.

In view of the above problems, the author has accumulated years of research and practical experience in related fields, and has specially created a gas solenoid valve bypass adjustment structure, which can effectively overcome the problem that the combustion appliance cannot maintain a low fire state and extinguish, and improve practicability. .

The purpose of this creation is to provide a bypass adjustment structure for a gas solenoid valve. When the gas solenoid valve closes the valve, the bypass adjustment structure can still allow small flow of gas to be released from the upstream inlet to the downstream outlet. The burner prevents flameout, and the user or the manufacturer can also control the minimum flow rate or close it through the fine adjustment of the bypass adjustment structure as required, which is suitable for various burners with different control mechanisms. It has convenient use and applicable scope. Extensive advantages.

To achieve the above object, the present invention provides a bypass adjustment structure for a gas solenoid valve. The gas solenoid valve is disposed on a gas supply pipe of a gas appliance and includes a valve seat having an upstream air inlet end and a downstream air outlet end, A valve provided between the upstream air inlet end and the downstream air outlet end, and a valve plug that closes or opens the valve by driving with electromagnetic force;
The bypass adjusting structure includes a bypass hole connecting the upstream air inlet end and the downstream air outlet end, and an adjustment screw provided on one side of the bypass hole, and the adjustment screw is adjustably formed with the bypass hole. A gap or closed the bypass hole; when the adjusting screw is adjusted to have a gap with the bypass hole, a part of the gas from the upstream intake end can enter the downstream exhaust end through the gap and be released.

With the above structure, when the valve plug closes the valve, the gap between the bypass hole and the adjusting screw can allow a small flow of gas to be released from the upstream intake end to the downstream outlet end to the burner, preventing unwarned flameout, In order to improve the convenience in use, and the user or the manufacturer can also fine-adjust the size of the gap or close it by adjusting the screw according to the needs, and then control the minimum gas flow or close it to adapt to the different burners. Control mechanism.

The following further describes the implementation of each element:

During implementation, the adjusting screw is provided on the valve seat at a position corresponding to the bypass hole. The outer end of the adjusting screw is provided with a nut located on the outside of the valve seat for force rotation and displacement. The inner end of the adjusting screw It is a stopper located on one side of the bypass hole, and the stopper can move away from or close to the bypass hole to form the gap when the adjustment screw is rotated and displaced, or abut the bypass hole to make it Closed.

During implementation, the end of the stopper portion has a tapered end, the smallest outer diameter of the tapered end is smaller than the inner diameter of the bypass hole, and the largest outer diameter is larger than the inner diameter of the bypass hole.

In practice, the stopper includes an extension rod having an outer diameter smaller than the adjusting screw, the extension rod end has a tapered end, the minimum outer diameter of the tapered end is smaller than the inner diameter of the bypass hole, and the outer edge of the extension rod is sleeved. An O-ring is provided to abut the outer periphery of the bypass hole and close the bypass hole.

In practice, the valve includes an opening connecting the upstream air inlet end and the downstream air outlet end, and a valve ring disposed around the opening for the valve plug to abut against the closed valve ring.

In practice, the valve ring is made of a rigid ring-shaped bracket covered with rubber or heat-resistant plastic.

During implementation, the valve plug is disposed at an end of a valve stem driven by electromagnetic force, the valve stem has a spherical portion, and the valve plug has a ball socket sleeved on the spherical portion, so that the valve plug can be opposed to each other. The valve stem is inclined and tightly abuts the valve.

During implementation, the gas solenoid valve includes an electromagnetic coil capable of generating electromagnetic force to drive the valve rod displacement, a return spring, and a self-retaining magnet; the electromagnetic coil driving the valve rod and the valve plug can be compressed or stretched when displaced away from the valve The return spring is held open by the self-holding magnet attracting the valve stem; or, the solenoid can reversely drive the valve stem and the valve plug out of the self-holding magnet, and the valve plug is caused by the elastic force of the return spring. Press tightly against the valve.

Compared with the prior art, this creation has the following advantages:

1. When the valve plug closes the valve, the gap between the bypass hole and the adjusting screw can be used to release small flow gas from the upstream intake end to the downstream outlet end to the burner to prevent unwarned flameout and improve the use. Convenience.

2. The user or manufacturer can fine-tune the gap by adjusting the screw according to the needs, and then control the minimum gas flow. If the minimum flow is not required to be maintained when the valve plug closes the valve, the bypass hole must be completely adjusted by the screw. It can be closed and can be adapted to the control mechanism of various burners.

3. The end of the stopper of the adjusting screw is tapered, which can make the gap between the bypass hole and the adjusting screw in a ring shape, so that the gas flow can be stably controlled.

4. The setting of the O-ring can closely abut the outer periphery of the bypass hole to close the bypass hole, and completely close the bypass hole when the user or manufacturer does not need to maintain a minimum flow rate, improving safety.

5. The valve ring on the valve is made of a rigid ring bracket covered with rubber or heat-resistant plastic. The outer layer of rubber or heat-resistant plastic can provide moderate elastic sealing to prevent sticking. The internal rigid ring bracket can avoid high temperature deformation. ,Extended service life.

6. The structure between the valve plug and the valve stem is connected with the ball and socket structure, so that the valve plug can deviate in any direction relative to the valve stem, and maintain the state of the sealed valve, which can overcome the valve stem due to tolerance or assembly. The problem that the valve plug cannot be closed due to deflection, not only improves the safety, but also improves the working efficiency of the entire group of gas solenoid valve manufacturing and installation.

Based on the technical means of this creation, the following is a list of implementation methods suitable for this creation, with illustrations as follows:

As shown in the first and second figures, the present invention is a bypass adjustment structure for a gas solenoid valve. The gas solenoid valve 100 is disposed on a gas supply line of a gas appliance and includes an upstream air inlet 11 and a downstream A valve seat 10 at the outlet end 12; a valve 20 provided in the valve seat 10 between the upstream inlet end 11 and a downstream outlet end 12; and a valve plug 30 provided in the valve seat 10 and driven by electromagnetic force . When the valve plug 30 is away from the valve 20 due to the use and control of a gas stove, water heater or fireplace (not shown), the gas entering the gas solenoid valve 100 from the upstream air inlet 11 can pass through The valve 20 is released from the downstream air outlet 12 for the combustion appliance to burn. When the valve plug 30 closes the valve 20, a part of the gas entering the gas solenoid valve 100 from the upstream inlet end 11 can be continuously released to the downstream outlet end 12 by the bypass adjusting structure 200, so that the burning appliance continues to fire with a small fire. combustion.

The purpose of the above-mentioned bypass adjustment structure 200 is to respond to the use of various small fires of the burning appliance, so that when the user wants to use the low fire to maintain the water temperature or cook the food slowly, the low fire state can be maintained very stably to prevent flameout. . Taking a gas cooker as an example, when the user wants to cook food on a slow fire, when the knob or digital fire controller is turned to the minimum fire, the gas cooker controls the gas solenoid valve 100, so that the valve plug 30 can close the valve. 20, in order to block a large flow of gas flow, so that a part of the gas is continuously released from the bypass regulating structure 200 to the downstream gas outlet end 12 to achieve the purpose of maintaining a small fire state and preventing flameout.

As shown in the figure, the bypass adjusting structure 200 includes a bypass hole 40 connecting the upstream intake end 11 and the downstream outlet end 12, and an adjustment screw 50 disposed on one side of the bypass hole 40; The adjusting screw 50 adjustably forms a gap 60 with the bypass hole 40 or closes the bypass hole 40. When the adjusting screw 50 and the bypass hole 40 have a gap 60 between each other, the aforementioned comes from the upstream A part of the gas at the intake end 11 can enter the downstream exhaust end 12 through the gap 60 and be released.

During implementation, the adjusting screw 50 is screwed on the valve seat 10 at a position corresponding to the bypass hole 40. The adjusting screw 50 is located at the outer end of the valve seat 10 and has a nut 51, which can be used by the user Or the manufacturer applies force to rotate the adjustment screw 50 to displace the inner end of the rotation adjustment screw 50, and further move the inner end of the adjustment screw 50 away from or close to the bypass hole 40.

In the first and second figures, the inner end of the adjusting screw 50 is a stopper portion 52 on one side of the bypass hole 40. The end of the stopper portion 52 has a tapered end 53, and the tapered end 53 The minimum outside diameter is smaller than the inside diameter of the bypass hole 40, and the maximum outside diameter is larger than the inside diameter of the bypass hole 40. In this way, when the adjusting screw 50 is rotationally displaced, the tapered end 53 at the end of the stopper portion 52 can be moved away from or close to the bypass hole 40 due to the rotation of the adjusting screw 50 and form a loop with the bypass hole 40. The gap 60 allows the gas to pass through the gap 60 and enter the downstream gas outlet end 12 to release gas.

As shown in the third and fourth figures, when the stopper portion 52 completely abuts around the bypass hole 40, the bypass hole 40 can be closed to completely block the gas. The adjustment method of the adjustment screw 50 is designed to meet the requirements of various different combustion appliances. For example, gas cookers are designed to maintain a low-fire state of use. When the user adjusts to a low fire, the manufacturer can make the valve plug 30 close the valve 20, and the small flow of gas can be released through the bypass hole 40. The fire power control of the small fire, that is, the flow rate of the gas, can be controlled by the aforementioned adjustment gap 60. If the gas cooker does not have this design, it is sufficient to rotate the adjusting screw 50 so that the stopper portion 52 closes the bypass hole 40, so that the bypass structure can be adapted to the control mechanisms of various burners.

As shown in FIGS. 5 to 8, the second embodiment of the present invention is different from the previous one in that the stopper portion 52 further includes an extension rod 54 having an outer diameter smaller than that of the adjusting screw 50. An end of the extension rod 54 is the aforementioned tapered end 53, and an outer edge of the extension rod 54 is sleeved with an O-ring 55 that can abut against the outer periphery of the bypass hole 40. The purpose of the O-ring 55 is to tightly abut the outer periphery of the bypass hole 40 by its elasticity, to assist the stopper portion 52 to close the bypass hole 40. Therefore, if the aforementioned user or manufacturer does not need to use this For this function, as shown in the eighth figure, the O-ring 55 can be used to abut the outer periphery of the bypass hole 40 to prevent gas from leaking from the bypass hole 40.

As shown in the ninth figure, during implementation, the valve 20 of the gas solenoid valve 100 further includes an opening 21 connecting the upstream intake end 11 and the downstream outlet end 12, and an opening 21 provided around the opening 21 for the valve. The plug 30 abuts the closed valve ring 22. In general, in order to resist high pressure, corrosion, and avoid gaps, the valve seat 10 is usually die-cast from metal, that is, the opening 21 of the valve 20 is surrounded by metal. In this way, the valve made of rubber When the plug 30 abuts against the opening 21 of the valve 20, a sticking phenomenon easily occurs, and the valve plug 30 does not open smoothly.

In order to overcome the sticking problem of the valve 20, the general solution is to use rubber to make the valve ring. However, because the use environment is mostly at a high temperature, the valve ring made of rubber is easy to soften and deform. The structure is coated with rubber 24 or heat-resistant plastic on the outside of a rigid ring-shaped bracket 23. On the one hand, the rigid ring-shaped bracket 23 is used to prevent deformation, and on the other hand, the rubber 24 or heat-resistant plastic is used to prevent sticking.

It is worth mentioning that the valve plug 30 in the figure is disposed at the end of a valve stem 70 that is displaced by driving with electromagnetic force. The valve stem 70 has a spherical portion 71 at the end, and the valve plug 30 has a ball socket 31 set. The spherical portion 71 is provided on the spherical portion 71 so as to have a circular arc clearance between the ball socket 31 and the spherical portion 71, so that the valve plug 30 can be deflected in any direction relative to the valve stem 70 and tightly abut against该 阀 20。 The valve 20.

The above-mentioned combination of the valve plug 30 and the valve stem 70 is to avoid that between the valve stem 70 and the valve 20, due to manufacturing tolerances or assembly problems, the shaft 30 caused by the valve plug 30 interlocking with the valve stem 70 is slightly different from the valve 20 Deflection makes it impossible to completely close the valve 20. According to the structural design with a circular arc surface clearance between the ball socket 31 and the spherical portion 71, if different axes between the valve stem 70 and the valve 20 occur, the valve plug 30 can still be deflected in any direction relative to the valve stem 70. It obliquely and closely abuts the valve 20, thereby improving safety and facilitating installation.

As shown in the tenth figure, this creative design can be implemented on any kind of gas solenoid valve 100. For example, the valve seat 10 in the first to eighth figures, the upstream inlet end 11 and the downstream outlet end 12 The arrangement is roughly on the same centerline. The valve seat 10 in the tenth figure has an arrangement of the upstream intake end 11 and the downstream exhaust end 12 at a right angle. In practice, it only needs to be located outside the valve 20 as described above. A bypass hole 40 communicating with the upstream inlet end 11 and the downstream outlet end 12 and an adjusting screw 50 disposed at one end of the bypass hole 40 with an adjustable distance may be provided. The adjustment methods of the adjustment screw 50 are as described above, and are not repeated here.

As shown in the tenth figure, the gas solenoid valve 100 further includes an electromagnetic coil 72 capable of generating electromagnetic force to drive the displacement of the valve stem 70, a return spring 73, and a self-retaining magnet 74. The electromagnetic coil 72 is energized. The rear can drive the valve stem 70 and the valve plug 30 to move away from the valve 20, so that the gas from the upstream intake end 11 passes through the valve 20 and enters the downstream outlet end 12 while compressing or stretching the return spring 73 and passing the self-holding magnet 74 attracts the valve stem 71, so that the electromagnetic coil 72 can be kept open without continuous power supply.

When you want to close the valve, you only need to supply power again to displace the solenoid 72 to drive the valve stem 70 and the valve plug 30 to displace and disengage from the self-holding magnet 74. Then, the valve plug 30 can be held by the elastic force of the return spring 73. Closely abutting on the valve 20, there is no need to continuously supply power to the electromagnetic coil 72; in other words, whether to open or close the valve 20, only a single power supply is required to allow the electromagnetic coil 72 to drive the valve stem 70 to move, and then it can stably It can be opened or closed by itself to save power.

The above embodiment descriptions and drawings are only examples of the preferred embodiments of this creation, and are not intended to limit the scope of this creation. Anything similar or similar to the purpose, structure, installation, features, etc. of this creation shall belong to The patent scope of this creation.

100‧‧‧Gas solenoid valve
10‧‧‧Valve seat
11‧‧‧ upstream inlet
12‧‧‧ downstream gas outlet
20‧‧‧ Valve
21‧‧‧ opening
22‧‧‧Valve ring
23‧‧‧ rigid ring bracket
24‧‧‧ Rubber
30‧‧‧Valve plug
31‧‧‧ ball socket
200‧‧‧ Bypass adjustment structure
40‧‧‧Bypass
50‧‧‧adjusting screw
51‧‧‧nut
52‧‧‧stop
53‧‧‧ tapered end
54‧‧‧Extension rod
55‧‧‧O-ring
60‧‧‧ Clearance
70‧‧‧ Stem
71‧‧‧ spherical
72‧‧‧ Solenoid
73‧‧‧Return spring
74‧‧‧Self-holding magnet

The first figure is a schematic structural diagram of a first embodiment of the creation.
The second figure is a partially enlarged schematic diagram of the first figure.
The third figure is a schematic structural diagram of a closed bypass hole according to the first embodiment of the creation.
The fourth diagram is a partially enlarged schematic diagram of the third diagram.
The fifth diagram is a schematic structural diagram of the second embodiment of the present invention.
The sixth diagram is a partially enlarged schematic diagram of the fifth diagram.
The seventh figure is a schematic structural diagram of a closed bypass hole according to the second embodiment of the creation.
The eighth figure is a partially enlarged schematic diagram of the seventh figure.
The ninth figure is a partially enlarged schematic diagram of the gas solenoid valve.
The tenth figure is a schematic structural diagram of a third embodiment of the creation.

Claims (8)

A gas solenoid valve bypass adjusting structure is provided on a gas supply pipeline of a combustion appliance, and includes a valve seat having an upstream air inlet end and a downstream air outlet end, and a gas seat provided at the upstream air inlet end and downstream. The valve between the air outlets, and a valve plug which is closed or opened by electromagnetic force driving, is characterized by:
The bypass adjusting structure includes a bypass hole connecting the upstream air inlet end and the downstream air outlet end, and an adjustment screw provided on one side of the bypass hole, and the adjustment screw is adjustably formed with the bypass hole. A gap or the bypass hole is closed, and a part of the gas from the upstream intake end can enter the downstream exhaust end through the gap and be released. The gas solenoid valve bypass adjusting structure according to claim 1, wherein the outer end of the adjusting screw is provided with a nut located outside the valve seat for rotation and displacement by force, and the inner end of the adjusting screw is located at a side A stop portion on one side of the through hole, and the stop portion can form the gap away from or approach the bypass hole when the adjustment screw is rotationally displaced, or close the bypass hole against the bypass hole. The gas solenoid valve bypass adjusting structure according to claim 2, wherein the end of the stopper has a tapered end, the minimum outer diameter of the tapered end is smaller than the inner diameter of the bypass hole, and the maximum outer diameter is larger than the bypass The inner diameter of the through hole. The gas solenoid valve bypass adjusting structure according to claim 2, wherein the stopper includes an extension rod having an outer diameter smaller than the adjusting screw, the extension rod end has a tapered end, and the tapered end has a minimum outer diameter It is smaller than the inner diameter of the bypass hole, and an outer edge of the extension rod is sleeved with an O-ring which can abut the outer periphery of the bypass hole and close the bypass hole. The gas solenoid valve bypass adjusting structure according to any one of claims 1 to 4, wherein the valve includes an opening connecting the upstream intake end and the downstream outlet end, and the valve is provided around the opening for the valve The plug abuts against the closed valve ring. The gas solenoid valve bypass adjusting structure according to claim 5, wherein the valve ring is made of a rigid ring-shaped bracket covered with rubber or heat-resistant plastic. The gas solenoid valve bypass adjusting structure according to any one of claims 1 to 4, wherein the valve plug is provided at a tip of a valve stem that is displaced by driving with electromagnetic force, and the tip of the valve stem has a spherical portion, The valve plug has a ball socket sleeved on the spherical part, so that the valve plug can be deflected relative to the valve stem and tightly abut against the valve. The gas solenoid valve bypass adjustment structure according to claim 7, wherein the gas solenoid valve includes an electromagnetic coil capable of generating electromagnetic force to drive the valve rod displacement, a return spring, and a self-retaining magnet; the electromagnetic coil When the valve stem and the valve plug are driven away from the valve, the return spring can be compressed or stretched, and the valve stem is held by the self-holding magnet to keep it open; or the solenoid can drive the valve stem and the valve plug away from the valve. The magnet is kept attracted, and the valve plug is tightly abutted against the valve by the elastic force of the return spring.