KR20180078792A - Stainless steel valve position indicator for environmental protection - Google Patents

Abstract

In order to achieve the objective, the present invention provides a valve position indicator including a housing constituted by assembling an upper cover and a lower cover, a cam shaft which passes through the housing upwards and downwards and a lower end of which is connected to an operation shaft of a valve to interwork with the valve according to an opening/closing operation of the valve, a pair of operation cams fixed to the cam shaft to interwork with the cam shaft, and an on/off switch terminal installed inside the housing and operated by the operation cam, wherein a valve opening/closing indicator that displays a valve opening/closing state is provided above the upper cover, and the valve opening/closing indicator includes a valve opening/closing display panel coupled to an upper end of the cam shaft protruding through the upper cover of the housing, and a window coupled to the upper cover and provided inside the valve opening/closing display panel. Accordingly, environment-resistant properties can be improved by using a thin plate type stainless steel material.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a valve position indicator for a stainless steel material,

The present invention relates to a valve position indicator, and more particularly, to a valve position indicator that is improved in environmental resistance by using a thin plate-like stainless steel material and is lighter than a cast product.

Generally, a valve installed in a piping for passing a fluid is opened and closed by a valve opening / closing device such as an actuator. At this time, a valve position indicator is used to confirm opening / closing of the valve.

Such a valve position indicator is constituted by a housing constituted by mutual assembly of an upper cover and a lower body, and a valve opening / closing display panel fixed to the upper portion of the housing by a separate casing.

An operation cam for operating the on / off switch terminal while being rotated together with the camshaft is provided on the camshaft, and an on / off switch terminal is provided on the inside of the housing, .

Further, the housing is coupled to the valve via a bracket, the upper lid has a cylindrical shape, a female screw is formed on the outer peripheral surface of the inner diameter, a cylindrical shape is formed in the lower body, And the upper cover and the lower body are assembled together by tightening the female screw and the male screw.

The valve opening / closing display panel is coupled to the camshaft and interlocked with the rotation of the camshaft. The hemispherical casing is fixed to the upper lid, and an opening portion in which a part of the outer side wall is opened is formed.

In addition, the casing is screwed into the upper cover to form a screw groove in the casing and the upper cover, respectively.

Such a conventional valve position indicator is often mounted on an actuator and is made of aluminum (AL) material for price competition.

However, stainless steel materials are used according to the limitations of materials in low temperature or corrosive environment, but they are produced only in casting products, which causes problems such as weight and high price.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method of manufacturing a stainless steel plate, which is made of a stainless steel thin plate material and which is lightweight compared to existing cast products, improves the environmental resistance in a low temperature or corrosive environment, It is an object of the present invention to provide a valve position indicator of a thin plate type stainless steel for improving the environmental resistance of a rotatable assembly type structure of an upper lid and a window.

However, the object of the present invention is not limited to the above-mentioned object, and another object which is not mentioned can be understood by those skilled in the art from the following description.

In order to accomplish the above object, the present invention provides a valve assembly comprising a housing formed by assembling an upper cover and a lower body, a camshaft penetrating the housing vertically and connected to the operation shaft of the valve at its lower end, A pair of operation cams fixed to the camshaft and interlocked with the camshaft; and an on / off switch terminal provided in the housing and operated by the operation cam, A valve opening / closing indicator for indicating an opening / closing state of the valve, the valve opening / closing indicator comprising: a valve opening / closing display plate coupled to an upper end of the camshaft protruding through an upper lid of the housing; The valve position indicator including a window provided therein.

The valve opening / closing indicator may further include a casing which is provided between the window and the valve opening / closing display panel and has a part of an outer wall thereof opened.

At this time, the window is coupled to the upper part of the upper lid to seal the housing, the window is made of a transparent material, and the upper lid and the window have a rotation coupling structure in which the window is rotated and coupled to the upper lid .

In addition, in the rotary coupling structure, the upper surface of the upper lid is provided with a cam shaft hole through which the cam shaft penetrates, a cylindrical portion protruding from the circumferential portion of the cam shaft hole to the upper side and protruding outward from the end of the cam shaft hole The lower portion of the window forms a coupling portion to be engaged with the upper cover, and the inner peripheral surface of the coupling portion is formed with a coupling portion corresponding to the coupling protrusion, thereby rotating the window, And is coupled to the cover.

Wherein an O-ring is provided in a space formed between an upper surface of the upper lid and the first end to maintain the airtightness between the upper lid and the window, wherein a first step is formed on an inner circumferential surface of the coupling part of the window, A second step is formed on the upper side, and a plurality of the engaging portions, on which the engaging jaw is engaged, are protruded and formed at regular intervals on a second inner circumferential surface connecting the first step and the second step.

In addition, the latching part may include a horizontal part having a vertical part in contact with the second step and an engaging main surface in contact with the lower side of the latching jaw in a 'B' shape, And a stopper is protruded.

 The diameter of the first inner circumferential surface that connects the bottom surface of the window and the first step is larger than the diameter of the second inner circumferential surface that connects the first step and the second step.

The upper cover and the lower body are made of a thin stainless steel plate. Bolt holes are formed at four corners of the joint where the upper cover and the lower body are in contact with each other to form a protruded bolt fastening portion. The embossing protruding in a convex shape is formed.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

As described above, according to the valve position indicator of the present invention, since the valve position indicator is made of a thin thin plate stainless steel material rather than a casting method, it is possible to improve the endurance, lightness, It is effective.

1 is a perspective view of a valve position indicator according to the present invention,
2 is a sectional view of a valve position indicator according to the present invention,
3 is a combined view of the valve opening / closing indicator according to the present invention,
Fig. 4 is a coupling view of the housing according to the present invention,
5 is a cross-sectional view of a window according to the present invention,
6 is a cross-sectional view of the top cover according to the present invention,
7 is a cross-sectional view illustrating a state in which a window and an upper lid are coupled according to the present invention,
8 is a cross-sectional view of a window showing another type of stiffening portion.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

In addition, the following embodiments are not intended to limit the scope of the present invention, but merely as exemplifications of the constituent elements set forth in the claims of the present invention, and are included in technical ideas throughout the specification of the present invention, Embodiments that include components replaceable as equivalents in the elements may be included within the scope of the present invention.

1 is a perspective view of a valve position indicator according to the present invention, FIG. 2 is a sectional view of a valve position indicator according to the present invention, FIG. 3 is a view showing a valve opening / closing indicator according to the present invention, Fig. 5 is a sectional view of a window according to the present invention, Fig. 6 is a sectional view of an upper lid according to the present invention, Fig. 7 is a sectional view showing a state in which a window and an upper lid are combined, Sectional view of a window showing a broken part in the form of a broken line.

1 and 2, the valve position indicator of the present invention includes a housing 10 configured by assembling upper cover 110 and lower body 120 as screws and assembly bolts, A camshaft 20 which penetrates vertically and whose lower end is connected to an operating shaft of a valve (not shown) and interlocks with the opening and closing operation of the valve; a pair of actuators fixed to the camshaft 20 and interlocked with the camshaft 20 And an on / off switch terminal 121 installed in the housing 10 and operated by the operation cam 210.

The upper lid 110 and the lower body 120 are made of a thin stainless steel plate, which can improve the environmental resistance, lighten the weight, and reduce the manufacturing cost as compared with the existing cast products.

The upper lid 110 and the lower body 120 may be manufactured by deep drawing or punching a stainless steel thin plate.

An embossing 41 protruding in a convex shape is formed on the surface of the joining portion of the upper lid 110 to provide rigidity and four corners of the joining portion 40 where the upper lid 110 and the lower body 120 are in contact with each other. A bolt hole is formed at the center to form a protruding bolt fastening part 410. [

The sealing pads 130 are provided between the joining portions 40 of the upper and lower bodies 110 and 120 so that the sealing pads 130 when the upper and lower bodies 110 and 120 are coupled, The bolt fastening holes of the nut for bolt fastening are welded and assembled in a protruding form to the bolt fastening part 410 of the lower body 120, (130) are fixed to prevent separation during assembly.

A screw groove for a captive bolt may be formed in the bolt hole of the bolt coupling part 410 of the upper lid 110 to prevent the screw 10 from being screwed when the housing 10 is assembled.

The operation cam 210 is coupled to the camshaft 20 and rotates together with the camshaft 20, and operates the on / off switch terminal according to opening and closing operations of the valve.

The on / off switch 121 is turned on / off by the operation cam 210 so that the on / off switch terminal and the off / And transmits a signal.

On the other hand, a valve opening / closing indicator 30 for indicating a valve opening / closing state is provided on the upper lid 110.

The valve opening and closing indicator 30 includes a valve opening and closing indicator 310 coupled to an upper end of the camshaft 20 protruding through the upper cover 110 of the housing 10, And a window 330 in which the valve opening / closing indication plate 310 is provided.

 The valve opening and closing indicator 30 further includes a casing 330 which is provided between the window 330 and the valve opening and closing display panel 310 and has an opening portion 321, Preferably, the casing 330 is coupled to the window 330 to be fixed.

That is, the valve opening / closing display plate 310 is also rotated together with the valve by the camshaft 20 interlocked with the opening / closing operation of the valve, and the opening / closing state of the valve is displayed outside through the opening portion 321 of the casing 320 do.

The window 330 is coupled to the upper portion of the upper lid 110 to seal the housing 10.

The window 330 is made of a transparent material and the upper lid 110 and the window 330 have a rotation coupling structure in which the window 330 is rotated and coupled to the upper lid 110.

At this time, a part of the window 330 may be painted or painted with a non-transparent material such as a film, and a valve opening / closing display panel 310 which is visible through the transparent material may be visually confirmed.

In other words, since it is made of stainless steel thin plate material, it is difficult to form screw groove structure unlike screw casting of existing casting product due to the characteristics of thin plate material during window assembly.

The rotation coupling structure includes a cam shaft hole 112 through which the cam shaft 20 penetrates on the upper surface of the upper lid 110 and a cylindrical portion 114 protruding upward from a circumferential portion of the cam shaft hole 112, And a plurality of engagement protrusions 116 protruding outward from the cam shaft hole 112 in the cylindrical portion 114 are formed at regular intervals.

The lower part of the window 330 constitutes a coupling part 331 to be coupled with the upper cover 110. An engagement part 333 is formed on an inner circumferential surface of the coupling part 331 so as to correspond to the engagement step 116. [ And the window 330 is rotated to be coupled to the upper lid 110 to seal the inside of the housing 10.

A first step C is formed on the inner circumferential surface of the engaging part 331 of the window 330 and an O-ring 118 is formed in a space formed between the upper surface of the upper lid 110 and the first step C So as to maintain airtightness between the upper cover 110 and the window 330.

A second step E is formed on the upper side of the first step C and a second inner circumferential surface D connecting the first step C and the second step E is formed with a step- A plurality of the engaging portions 333 are formed at predetermined intervals.

The engaging portion 333 has a vertical portion 333a which is in contact with the second step E in the shape of a circle when viewed radially from the inside of the window, And a horizontal portion 333b having a main surface 333d and a stopper 333c protruding from one side of the horizontal portion 333b for preventing the window 330 from rotating.

The window 330 is rotated so that the latching protrusion 116 of the upper cover 110 contacts the latching surface 333d of the horizontal portion 333b and the window 330 So that one side of the latching jaw 116 is caught by the stopper 333c, thereby preventing the window 330 from rotating.

When the window 330 is separated from the upper lid 110, the gap between the upper surface of the stopper 333c and the second edge E can be held by the O-ring 118, The window 330 is rotated so as to be separated from the latching part 333.

 The diameter d1 of the first inner circumferential surface B connecting the bottom surface A of the window 333 and the first step C is smaller than the diameter d1 of the first step C and the second step E, (D1 > d2) larger than the diameter d2 of the second inner circumferential surface D connecting the first and second inner circumferential surfaces.

The protruding distance of the protrusion 333 protruding from the second inner circumferential surface D may be smaller than the protruding distance of the second protrusion E,

The height h1 of the engaging main surface 333d of the horizontal portion 333b from the engaging main surface 333d-1 on the other side inclined at a predetermined angle (taper) to the upper surface of the upper lid 110 is smaller than the height h1 (H1> h2) higher than the height h2 from the main surface 333d-2 to the upper surface of the upper lid 110. The lower surface of the upper lid 110 Is smaller than the height h1 from the other engaging main surface 333d-1 to the upper surface of the upper lid 110 and the height h3 from the other engaging main surface 333d-2 to the upper surface (H2 < h3 < h1).

That is, the engaging main surface 333d is inclined at a predetermined angle and is tightly engaged with the engaging jaw 116, so that the coupling force between the upper lid 110 and the window 330 can be improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification or improvement is possible.

It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

10: housing 110: upper cover
112: cam shaft hole 114:
116: Jaws 118: O-rings
120: Lower body 121: O / off switch
20: camshaft 210: operating cam
30: valve opening / closing indicator 310: valve opening /
320: casing 321:
330: window 331:
333: Retaining part 333a: Vertical part
333b: Horizontal part 333c: Stopper
333d: engagement surface 40:
41: embossing 410: bolt fastening part

Claims (8)

A camshaft connected to the operation shaft of the valve and having a lower end penetrating the housing vertically and interlocked with the opening / closing operation of the valve, and a cam shaft fixed to the camshaft and interlocked with the camshaft A pair of operation cams, and an on / off switch terminal provided inside the housing and operated by the operation cam,
A valve opening / closing indicator for indicating a valve opening / closing state is provided on an upper portion of the upper lid,
A valve opening / closing display panel coupled to an upper end of the camshaft projecting through an upper lid of the housing; and a window disposed outside the valve opening / closing panel and assembled with the upper lid, . The method according to claim 1,
Wherein the window is coupled to an upper portion of the upper lid to seal the housing, the window is made of a transparent material, and the upper lid and the window have a rotation coupling structure in which the window is rotated and engaged with the upper lid. Valve position indicator. 3. The method of claim 2,
The rotationally coupled structure
Wherein a camshaft hole through which the camshaft penetrates is formed on an upper surface of the upper lid and a cylindrical portion protruding from a circumferential portion of the camshaft hole to an upper side is formed and a jaw protruding outward from the cam shaft hole at an end of the cylindrical portion is formed at a predetermined interval A plurality of electrodes are formed,
Wherein the lower portion of the window forms a coupling portion to be engaged with the upper cover and the inner peripheral surface of the coupling portion is coupled to the upper cover by rotating the window due to the engagement portion formed to correspond to the engagement protrusion. The method of claim 3,
Wherein an O-ring is provided in a space formed between an upper surface of the upper lid and the first end to maintain airtightness between the upper lid and the window,
Wherein a second step is formed on an upper side of the first step and a plurality of the engaging portions are formed on a second inner circumferential surface that connects the first step and the second step, Indicator. 5. The method of claim 4,
Wherein the stopper includes a vertical portion having a 'B' shape in contact with the second step, and a horizontal portion having a hook main surface contacting with a lower side of the hooking jaw, wherein a stopper for preventing rotation of the window is provided at one side of the horizontal portion And the valve position indicator is protruded. 5. The method of claim 4,
Wherein the diameter of the first inner circumferential surface connecting the bottom surface of the window and the first step is larger than the diameter of the second inner circumferential surface connecting the first step and the second step. The method according to claim 1,
Wherein the upper cover and the lower body are formed of a stainless steel thin plate. The method according to claim 1,
Wherein the valve opening / closing indicator further comprises a casing provided between the window and the valve opening / closing display panel and having a part of an outer wall thereof opened.

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