TWM513949U - Improvement of gas valve - Google Patents

Description

Improvement of gas valve

The present invention provides an improvement of a gas valve including a valve port and a spherical valve plug that is disposed outside the valve port and can abut against or away from the valve port, wherein the valve port is axially oriented Or a radial sealing ring protrudes from the radial direction, thereby increasing the airtightness of the valve.

According to the valve structure of the general gas valve, a spherical valve plug corresponding to the valve port is disposed on a valve port, and the maximum outer diameter of the spherical valve plug is larger than the valve port, and when the ball valve plug is directly pressed and blocked at the valve port, Blocking the gas circulation to achieve the purpose of closing the valve, and when the ball valve plug is away from the valve port, the distance between the outer circumference of the ball valve plug and the valve port is changed, so that the valve opening can be changed in opening degree to adjust the gas. The purpose of the flow.

Most of the above-mentioned conventional valve ports have a sharp angle of 90 degrees with the inner diameter of the valve body passage. Although the basic surface treatment such as the lead angle or the rounded corner is used for the burr removal, after the valve is operated for a period of time, the spherical valve plug will Permanently deformed indentations due to long-term compression at the sharp corners of the valve. When such an irreversible indentation is formed, in addition to affecting the gas density when the valve is closed, it may also cause a sticking effect when the valve is opened, causing the valve plug to become stuck, resulting in the valve not being able to open smoothly or delay opening the valve. .

In the prior art, the patent number ZL 200820051615.7 "proportional valve port sealing composite assembly" is provided with a ring-shaped annular groove on the gasket which is in contact with the spherical valve plug at the valve port, and the annular groove can provide space for the gasket to be pushed. When the ball valve plug is placed against the gasket, the gasket can be pushed and deformed to prevent the ball valve plug from being indented.

However, when the groove of the above prior art patent number ZL 200820051615.7 is pushed, not only the groove is compressed, but the entire gasket is in this contact. The position is deformed and bent, so that when the entire gasket receives the top of the spherical valve plug, the reaction force is difficult to accurately control, thereby affecting the control of the valve opening.

The creator has also designed a "gas valve structure" (patent number ZL 201120012796.4, TW M406674), and an annular tapered surface for the spherical valve plug to make oblique contact at the periphery of the valve port, so that the spherical valve plug is long When it comes into contact with the valve port, deformation and wear are less likely to occur, which affects the valve tightness, and there is no problem that the valve opening is difficult to control.

In the implementation of the above-mentioned creator, the center point of the ball valve plug must be accurately aligned with the center of the valve port to ensure that the ball valve plug can evenly abut against the inner edge of the valve port; It is not difficult for assembly technology, but if it provides some flexibility in the annular tapered surface, it will speed up the assembly and increase productivity.

In view of this, the creator has accumulated many years of research and practical experience in related fields, and created a “improvement of gas valve”, which not only continues the characteristics of the valve port and the spherical valve plug, but also provides the two. The elasticity of the inclined contact surface makes the assembly faster.

The purpose of this creation is to provide a "improvement of gas valve", which can effectively overcome the prior art problem of providing an annular groove on the gasket, which makes the control of the valve opening degree difficult to control, and has the advantages of convenient assembly.

In order to achieve the above object, the present invention provides an improvement of a gas valve including a valve port and a spherical valve plug movable to the outside of the valve port and capable of abutting against or away from the valve port. Wherein: the valve port has an annular gasket around the valve port, and the inner edge of the outer surface of the gasket is provided with a ring of elastic sealing ring for the ball valve plug to abut, the elastic sealing ring abuts the ball valve plug against the gasket The outer direction is axially convex or protrudes radially toward the inner edge of the gasket. When the spherical valve plug abuts against the elastic sealing ring of the gasket, the elastic sealing ring is elastically inclined by pushing and follows the spherical shape. The outer edge of the valve plug is elastically deformed to abut against the outer surface of the spherical valve plug, thereby expanding the contact area between each other, thereby achieving the effect of increasing the airtightness of the valve.

The above-mentioned creative feature is different from the prior art in that it is required to provide a groove on the outer side of the gasket to provide a gasket deformation and tightness. The elastic sealing ring is elastically inclined by being pushed and deformed against the spherical valve plug, not only can Effectively and accurately control the opening of the valve. When the position between the valve port and the ball valve plug is not perfectly precisely aligned due to tolerance during the manufacture or assembly of the gas valve, the elastic inclined contact provided by the elastic sealing ring It also ensures the airtightness of the valve.

In one embodiment, the gasket is wrapped on the outside of the annular bracket, and the outer side of the annular bracket protrudes from the outside of the gasket to form a fixing portion. The fixing portion is fixed on the valve body to fix the gasket on the valve body to form a valve port.

When implemented, the inner ring of the gasket has a beveled surface that allows the cross-section of the inner ring of the gasket to taper from the outside toward the inside to facilitate demolding of the gasket during manufacture.

In implementation, the ball valve plug is coupled with a differential pressure diaphragm through a connecting rod. When the differential pressure diaphragm moves due to pressure change, the spherical valve plug can be synchronously driven to move, thereby automatically adjusting the valve opening degree or closing the valve.

Compared with the prior art, the present invention utilizes the elastic sealing ring to be elastically inclined due to pushing and deformed against the spherical valve plug, which can effectively control the opening degree of the valve accurately, during the manufacture or assembly of the gas valve. When the position between the valve port and the ball valve plug is slightly deviated due to the tolerance, the elastic inclined contact provided by the elastic sealing ring can also ensure the airtightness of the valve, effectively overcoming the prior art in the plane of the outer surface of the gasket. The groove provides the problem of gasket deformation.

The following is based on the technical means of this creation, and enumerates the suitable for this creation. The implementation method, together with the schema description as follows:

100‧‧‧ valve body

10‧‧‧ valve port

20‧‧‧Ball valve plug

21‧‧‧ Connecting rod

22‧‧‧ differential pressure diaphragm

30‧‧‧Washers

31‧‧‧Outer plane

32‧‧‧Elastic seal ring

33‧‧‧Bevel

34‧‧‧ring bracket

35‧‧‧ fixed department

First figure: Schematic diagram of the position of the first embodiment of the present creation.

Second Figure: A side cross-sectional view of the first embodiment of the present creation.

Third figure: Schematic diagram of the action position of the first embodiment of the present creation.

Fig. 4 is a schematic view showing the action of pushing the gasket of the first embodiment of the present invention.

Fig. 5 is a side cross-sectional view showing the gasket of the second embodiment of the present invention.

Fig. 6 is a schematic view showing the action of pushing the gasket of the second embodiment of the present invention.

Figure 7 is a side cross-sectional view of the gasket of the third embodiment of the present invention.

Fig. 8 is a schematic view showing the action of pushing the gasket of the third embodiment of the present invention.

As shown in the first to fourth figures, the position and operation of the first embodiment of the present invention are shown in the figure. In the improvement of the gas valve of the present invention, the gas valve is disposed in the passage of the valve body 100, including a valve port. 10 and a ball valve plug 20 having a maximum outer diameter larger than the valve port 10, the ball valve plug 20 is movably disposed outside the valve port 10, and can close the valve against the valve port 10, or move away from the valve port 10, and The distance between the ball valve plug 20 and the valve port 10 is varied to control the opening of the valve.

In the first figure, the spherical valve plug 20 is interlocked with a differential pressure diaphragm 22 through a connecting rod 21, and when the differential pressure diaphragm 22 moves due to the pressure change, the spherical valve plug 20 can be synchronously moved to achieve the aforementioned automatic Adjust the valve opening or close the valve.

As shown in the second figure, the present invention is characterized in that: the valve port 10 has an annular gasket 30 around the inner edge 31 of the outer surface 31 of the air inlet direction, and a ring is protruded for the ball valve. The plug 20 abuts against the elastic sealing ring 32, and the elastic sealing ring 32 projects axially toward the outer side of the ball valve plug 20 against the washer 30.

When the ball valve plug 20 is moved against the washer 30, as previously described, since the maximum outer diameter of the ball valve plug 20 is larger than the valve port 10, the ball valve plug 20 first abuts against the elastic seal ring 32 when it is moved to the washer 30. At this time, as shown in the fourth figure, the outer periphery of the spherical valve plug 20 can push the elastic sealing ring 32 and urge the elastic sealing ring 32 to elastically tilt outwardly so as to use the inclined portion thereof along the spherical valve plug 20 The edge curvature is elastically deformed and abuts against the outer surface of the spherical valve plug 20, thereby expanding the contact area between the spherical valve plug 20 and the gasket 30, thereby achieving the purpose of increasing the airtightness of the valve.

As shown in the fifth and sixth figures, in the practice of the present invention, the protruding direction of the elastic sealing ring 32 does not necessarily have to protrude axially toward the washer 30 as in the second figure to face the inner diameter of the washer 30. The implementation of the extension is also equivalent to the implementation the way. When the elastic sealing ring 32 is elastically inclined by being pushed by the spherical valve plug 20, and elastically deformed along the outer edge of the spherical valve plug 20 to abut against the outer surface of the spherical valve plug 20, the spherical valve plug can be similarly enlarged. The contact area between the 20 and the gasket 30 increases the airtightness of the valve.

7 is a schematic structural view of the third embodiment of the present invention. For the convenience of manufacture, the inner ring of the gasket 30 has a slope 33 when the inner ring of the gasket 30 is oriented from the outside to the inside. The tapering is tapered to facilitate demolding of the gasket 30 during manufacture.

In addition, as shown in the first and second figures, the gasket 30 is preferably made of elastic and corrosion-resistant rubber, and the gasket 30 is coated on the outside of a rigid annular bracket 34, and the annular bracket A fixing portion 35 is formed on the outside of the gasket 30, and the fixing portion 35 is fixed to the valve body 100 for fixing the gasket 30 to the passage outlet of the valve body 100, so that the passage of the valve body 100 is fitted with the gasket 30, Together, the aforementioned valve port 10 is formed.

The above description of the embodiments and the drawings are merely illustrative of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; any similarity or similarity to the structure, device, and features of the present invention should be It is the creation purpose of this creation and the scope of patent application.

100‧‧‧ valve body

20‧‧‧Ball valve plug

21‧‧‧ Connecting rod

30‧‧‧Washers

31‧‧‧Outer plane

32‧‧‧Elastic seal ring

34‧‧‧ring bracket

35‧‧‧ fixed department

Claims (4)

An improvement of a gas valve, comprising: a valve port and a ball valve plug movably disposed outside the valve port and capable of abutting against or away from the valve port, wherein the valve port has a periphery An annular gasket, the inner edge of the outer surface of the gasket is provided with a ring of elastic sealing ring for the spherical valve plug to abut, and the elastic sealing ring protrudes axially toward the outer side of the gasket, or When the spherical valve plug abuts against the elastic sealing ring of the gasket, the elastic sealing ring is pushed and elastically inclined, and elastically deforms along the outer edge of the spherical valve plug. Rely on the outer surface of the ball valve plug. The improvement of the gas valve according to the first aspect of the invention, wherein the gasket is wrapped on the outside of an annular bracket, and the outer side of the annular bracket protrudes from the outside of the gasket to form a fixing portion, and the fixing portion is fixed on the valve body. . The improvement of the gas valve according to claim 1, wherein the inner ring of the gasket has a slope so that the cross section of the inner ring of the gasket is tapered from the outside toward the inside. The improvement of the gas valve according to the first aspect of the patent application, wherein the spherical valve plug is linked with a differential pressure diaphragm through a connecting rod, and the differential pressure diaphragm can synchronously drive the spherical valve plug to move when moving due to the pressure change. Adjust the valve opening or close the valve.