Valve plug structure and gas proportional valve

Abstract

A valve plug structure and a gas proportional valve, the valve plug structure comprising a proportional valve core, an upper valve rod, a lower valve rod, a tray, a diaphragm and a spring, the upper valve rod comprising a connecting rod arranged at an upper end and a sub-hinge arranged at a lower end, the upper valve rod comprising a female hinge arranged at an upper end, a valve core seat arranged at a lower part and a spring seat cavity; the diaphragm and the tray are stacked up and down, the connecting rod is fixedly connected with the diaphragm and the tray, the upper valve rod and the lower valve rod are in clearance fit and the sub-hinge extends into the female hinge in clearance fit, and the upper end of the spring extends into the spring seat cavity; when the gas pressure is constant, the upper valve rod and the lower valve rod are in close contact; when the gas pressure changes, the diaphragm vibrates, the upper valve rod swings relative to the lower valve rod, and the lower valve rod remains unchanged. The upper valve rod and the lower valve rod are connected by the sub-hinge and the female hinge and move up and down together, when the diaphragm vibrates, the upper valve rod swings relative to the lower valve rod, and the lower valve rod remains unchanged, thereby realizing constant gas outlet.

Description

Technical Field

[0001] This utility model relates to a gas proportional valve, and more particularly to a valve plug structure. Background Technology

[0002] The existing technology, Chinese patent 202120855217.6, describes a gas proportional valve, including a proportional regulating valve assembly and a gas outlet shut-off valve assembly. The proportional regulating valve assembly includes a proportional regulating valve body, an iron core with a coil sleeved on it, a proportional regulating valve core, and an elastic element. The proportional regulating valve body includes a pressure-stabilizing chamber with a gas inlet and a proportional regulating valve port; the iron core is fixed to the outer surface of the proportional regulating valve body; the proportional regulating valve core and the elastic element are configured such that: when the coil is de-energized, the proportional regulating valve core is pressed into the pressure-stabilizing chamber by the elastic element, blocking the proportional regulating valve port; when the coil is energized, it is attracted by the iron core and opens the proportional regulating valve port, allowing the pressure-stabilizing chamber and the gas outlet shut-off valve assembly to connect. The problem is that: the upper end of the valve stem is connected to the diaphragm; when the gas pressure changes, the diaphragm vibrates, and the valve core also vibrates, causing changes in the gas output. Utility Model Content

[0003] The purpose of this invention is to provide a valve plug structure that features diaphragm vibration, a constant proportional valve core state, and a constant gas output.

[0004] This invention is implemented as follows: a valve plug structure, characterized in that it includes a proportional valve core, an upper valve stem, a lower valve stem, a tray, a diaphragm, and a spring. The upper valve stem includes a connecting rod at the upper end and a sub-hinged part at the lower end. The upper valve stem includes a female hinge portion at the upper end, a valve core seat and a spring seat cavity at the lower end; The diaphragm and tray are stacked one on top of the other. The connecting rod is fixedly connected to the diaphragm and tray. The upper valve stem and lower valve stem are clearance-fitted, and the sub-hinged part extends into the female hinged part with clearance fit. The upper end of the spring extends into the spring seat cavity. When the gas pressure is constant, the upper valve stem and lower valve stem are in contact. When the gas pressure changes, the diaphragm vibrates, the upper valve stem swings relative to the lower valve stem, and the lower valve stem remains unchanged.

[0005] The valve plug structure described above is characterized in that the sub-hinged portion includes a rod portion and a spherical head; The female hinge portion includes an axial hole and a spherical cavity portion; The rod and the spherical head are located in the axial hole and the spherical cavity, respectively, and are clearance-fitted.

[0006] The valve plug structure described above is characterized in that: the rod portion is in the shape of an inverted frustum cone, with a rounded top end and a spherical head connected together; The axial hole is in the shape of an inverted frustum, with the top round end connected to the spherical cavity.

[0007] The valve plug structure is characterized in that: the lower valve stem is hollow with a lower opening and extends into the spring seat cavity, and the lower end of the lower valve stem extends into the upper end of the spring.

[0008] A gas proportional valve, characterized in that it includes a valve plug structure as described above.

[0009] This utility model discloses a valve plug structure in which the upper valve stem and the lower valve stem are connected by a sub-hinged part and a female hinged part, and move up and down together. When the diaphragm vibrates, the upper valve stem swings relative to the lower valve stem, while the lower valve stem remains unchanged, thereby achieving a constant gas output. Attached Figure Description

[0010] Figure 1 This is one of the exploded perspective views of this utility model.

[0011] Figure 2 This is the second exploded perspective view of this utility model.

[0012] Figure 3 This is a cross-sectional view of the present invention.

[0013] Figure 4 This is a perspective view of the present invention. Detailed Implementation

[0014] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] Example 1 like Figure 1 , Figure 2 , Figure 3 As shown, a valve plug structure includes a proportional valve core 1, an upper valve stem 2, a lower valve stem 3, a tray 4, a diaphragm 5, and a spring 6. The upper valve stem 2 includes a connecting rod 21 at the upper end and a sub-hinged part 22 at the lower end. The upper valve stem 2 includes a female hinge portion 31 at the upper end, a valve core seat 32 at the lower end, and a spring seat cavity 33; The diaphragm 5 and the tray 4 are stacked one on top of the other. The connecting rod 21 is fixedly connected to the diaphragm 5 and the tray 4. The upper valve rod 2 and the lower valve rod 3 are in clearance fit, and the sub-hinged part 22 extends into the female hinged part 31 in clearance fit. The upper end of the spring 6 extends into the spring seat cavity 33. When the gas pressure is constant, the upper valve rod 2 and the lower valve rod 3 are in contact, and the spring 6 keeps the upper valve rod 2 and the lower valve rod 3 in contact. When the gas pressure changes, the gas pressure acts on the diaphragm 5 and the proportional valve core 1 respectively. The diaphragm 5 vibrates, the upper valve rod 2 swings relative to the lower valve rod 3, and the lower valve rod 3 remains unchanged. This achieves a constant gas flow rate.

[0017] The sub-hinged portion 22 includes a rod portion 221 and a spherical head 222; The female hinge portion 31 includes an axis hole 311 and a spherical cavity portion 312; The rod portion 221 and the spherical head 222 are located in the axial hole 311 and the spherical cavity portion 312 respectively, and are clearance-fitted.

[0018] As a further improvement of this utility model: the rod portion 221 is in the shape of an inverted frustum, with the top round end and the spherical head 222 connected; The axial hole 311 is in the shape of an inverted frustum, with its top round end connected to the spherical cavity 312.

[0019] As a further improvement of this utility model: the lower valve stem 3 is hollow with a lower opening and extends into the spring seat cavity 33, and the lower end of the lower valve stem 3 extends into the upper end of the spring 6. This structure prevents the ammunition from swaying and keeps the spring upright.

[0020] Example 2 like Figure 3 , Figure 4 As shown, a gas proportional valve is characterized by comprising the valve plug structure, valve body 7, valve cover 8, magnet assembly 9, electromagnet 10, and bottom cover plate 11 as described above. The electromagnet 10 includes an iron core and a coil; The valve body 7 includes an air inlet pipe 71, a solenoid valve seat 72, an upper-opening air inlet chamber 73, and a lower-opening air outlet chamber 74. A proportional valve core seat is provided at the lower end of the air inlet chamber 73. The magnet assembly 9 is fixed to the connecting rod 21. The lower valve rod 3 extends into the intake chamber through the outlet chamber. The proportional valve core 1 cooperates with the proportional valve core seat. The diaphragm 5 is embedded in the countersunk hole at the upper end of the intake chamber. The valve cover 8 is fastened to the intake chamber to fix the diaphragm. The electromagnet 10 is set on the support column 81 of the valve cover 8. The screw passes through the fixing foot plate 101 of the electromagnet 10, the support column 81 and is screwed into the valve body 7. The bottom cover plate 11 is fastened to the outlet chamber and the bottom cover plate 11 supports the spring 6.

[0021] Figure 3 This is a view of the gas proportional valve in the off state, with the iron core and magnet assembly 9 magnetically attracted to each other, and the spring 6 in the extended state; the proportional valve core 1 and the proportional valve core seat are in contact. When electromagnet 10 is energized, the upper valve stem, lower valve stem, and proportional valve core move downward together and compress spring 6, causing proportional valve core 1 to leave the proportional valve core seat; the gas in the intake chamber enters the outlet chamber; the gas pressure in the outlet chamber acts on diaphragm 5 and proportional valve core 1; when the gas pressure changes, the diaphragm vibrates, and the upper valve stem 2 swings relative to the lower valve stem 3; proportional valve core 1, under the combined action of gas pressure and spring 6, maintains its state, thus achieving a constant gas flow rate.

[0022] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A valve plug structure, characterized in that: Includes a proportional valve core, upper valve stem, lower valve stem, tray, diaphragm, and spring. The upper valve stem includes a connecting rod at the upper end and a sub-hinged part at the lower end. The upper valve stem includes a female hinge portion at the upper end, a valve core seat and a spring seat cavity at the lower end; The diaphragm and tray are stacked one on top of the other. The connecting rod is fixedly connected to the diaphragm and tray. The upper valve stem and lower valve stem are clearance-fitted, and the sub-hinged part extends into the female hinged part with clearance fit. The upper end of the spring extends into the spring seat cavity. When the gas pressure is constant, the upper valve stem and lower valve stem are in contact. When the gas pressure changes, the diaphragm vibrates, the upper valve stem swings relative to the lower valve stem, and the lower valve stem remains unchanged.

2. The valve plug structure according to claim 1, characterized in that: The sub-hinged portion includes a rod portion and a spherical head; The female hinge portion includes an axial hole and a spherical cavity portion; The rod and the spherical head are located in the axial hole and the spherical cavity, respectively, and are clearance-fitted.

3. The valve plug structure according to claim 2, characterized in that: The rod is shaped like an inverted frustum, with a rounded top end and a spherical head connected together. The axial hole is in the shape of an inverted frustum, with the top round end connected to the spherical cavity.

4. The valve plug structure according to claim 1, characterized in that: The lower valve stem is hollow with a lower opening and extends into the spring seat cavity, with the lower end of the lower valve stem extending into the upper end of the spring.

5. A gas proportional valve, characterized in that: Includes a valve plug structure as described in any one of claims 1-4.

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