KR0170828B1 - Body of gas valve and its processing method - Google Patents

Abstract

The grease groove in the body of the gas valve is discontinuous in the axial direction of the body, narrow in the circumferential direction, and high in airtightness.

The elliptical grease stops 11, 12 and 13 are discontinuously provided at a position circumferentially away from the communication hole or the communication groove in the rotary sliding surface 2 of the body 1.

Each grease stop is cut by the cutting degree of the eccentric position of the bowl end mill in which the cutting degree which cuts into a round spherical shape is cut | disconnected, or it is cut by the cutting degree of the front of a bowl end mill, a twist drill, etc., and becomes elliptical shape.

Description

Body of gas valve and processing method

1 is a front view of an embodiment of the valve body of the present invention.

2 is a side view of an embodiment of the valve body of the present invention.

3 is a cross-sectional view taken along line 3-3 of FIG.

4 is a cross-sectional view taken along line 4-4 of FIG.

5 is a cross-sectional view taken along line 5-5 of FIG.

6 is a cross-sectional view taken along line 6-6 of FIG.

7 is a sectional view taken along line 7-7 of FIG.

8 is a plan view of an embodiment of a processing apparatus of the present invention.

Figure 9 shows a conventional gas valve body (a) is a front view, (b) is a side view.

* Explanation of symbols for main parts of the drawings

1: Body of gas valve 2: Rotating contact surface

7,8: communication groove 9,10: communication hole

11,12,13: Grease Stop 20: Turn Table

27,28,29: Bowl End Mill 30,31: Twist Drill

The present invention relates to a body in which a grease stop of a gas valve used for a gas appliance, a gas pipe, or the like is formed.

The body of the gas valve is composed of a conical surface or a cylindrical surface to form a rotating sliding surface, and the grease stop formed in the body stores the grease for lubrication to maintain lubrication, and at the same time, it removes foreign substances such as hard dust that gets into the rotating sliding surface. It is also useful as a trap to protect the rotating sliding surface.

Therefore, the grease stop is preferably installed over all lengths in the axial direction of the body, but in the airtight aspect, it is not preferable to form it large in the conical direction.

On the other hand, since the communication groove provided for the gas distribution also has a grease stop action on the communication groove surface, there is a case in which the grease stop is not provided at the side position where this communication groove is installed.

9 shows a conventional embodiment, in which the communication grooves c ₁ and d ₁ for gas flow are formed in the rotational sliding surface b of the body a, and the communication holes c ₂ and d. ₂ ) is addressed.

Thus, the grease stops e ₁ and e _{2 in the} form of dies are provided with a gap between them in the circumferential direction from the communication grooves c ₁ and d ₁ and in the axial direction, as seen from the front.

Since each grease stop (e ₁ , e ₃ ) is cut with a price cutter or the like, the edges (f) of both sides are formed perpendicular to the axis so that the inner surface of the valve body (h) is easily scratched and the groove width (g) In addition, there is a fear that the airtightness is also greatly reduced.

This invention makes it a subject to obtain the body in which the grease stop part of the shape narrow in the circumferential direction was extended in the axial direction.

In order to solve the above problems, the first means applied to the body is provided in the body of the gas valve, which is provided with a rotary sliding surface and a gas flow communication groove formed in the rotary sliding surface as described in claim 1. In the circumferential direction from the communication groove in the circumferential direction, the width of the circumferential direction of the body is narrow in the axial direction, the center portion is deep, characterized in that the plurality of grease stops are arranged in a line in the axial direction of the body spaced apart .

In addition, the second means is located in the circumferential direction from the communication groove in the body of the gas valve is provided with the rotary sliding surface and the gas communication communication grooves provided in the rotary contact surface as described in claim 2 The elliptical plural grease stops, which are recessed on a gentle inclined surface from the rotational sliding surface at the position, are arranged in a line at intervals with their long diameter in the axial direction of the body.

As described in claim 3, the third means is characterized in that different positions of the communication groove and the axial direction of the plurality of grease stops are set in accordance with claims 1 or 2.

The first means for processing the body is to cut a plurality of grease stops by fixing the material of the body to the holding device as described in claim 4 to contact the material with the eccentric position of the tip of the bowl end mill. It is characterized by.

The second means for processing the body, as described in claim 5, has a tool for fixing the material of the body to the holding device and having a cutting edge in the form of a slanted mountain at the distal end. Cutting a plurality of grease stops by touching them perpendicularly.

According to the means of claim 1, each grease stop is narrow in the circumferential direction, long in the axial direction, and deep in the central part, so that the airtightness in the circumferential direction is high and an elongated grease accommodating space is formed to accommodate a large amount of grease. Axial airtightness is also maintained at the gaps between the stops.

According to the means of claim 2, the bottom of the grease stop forms a gentle inclined surface with respect to the rotational sliding surface, and since no sharp edge is formed, there is no closed end that swept the inner surface of the valve body, and each grease stop has a circumferential width. This narrow and long axis is formed so that the air tightness in the circumferential direction is high, and an elongated grease receiving space is formed in the axial direction to accommodate a large amount of grease, and the airtightness in the axial direction is also maintained at the intervals between the respective grease stops. do.

According to the means of claim 3, since the communication groove acting as the grease stop and the grease stop are installed in the axial direction, the grease stop is provided over the entire length in the axial direction of the rotary sliding surface.

According to the means of claim 4, it is possible to cut at high cutting speed as a whole by cutting the rotary sliding surface of the conical surface or the cylindrical surface at the eccentric position of the bowl mill, as well as the circumference of the body because the grease stop formed by the cutting is round spherical shape. It is short in the direction, long in the axial direction, and has a long oval shape in the center.

According to the means of claim 5, since the tool is in contact with the sliding surface of the material perpendicularly, the tool is short in the circumferential direction of the body by the cutting of the shape of the tool, which is easy to set the position of the tool, the feed amount and the slanted slope. The grease stop, which is deep in the middle, is cut in the direction.

EXAMPLE

1 to 4, reference numeral 1 denotes a gas valve body having a tapered rotary sliding surface 2, the flange 3 of which is larger and the two divided connections 4 on the larger diameter thereof. The rotational transmission member, not shown in the division groove 4a, is to be engaged, and the center hole 5 of the same inner diameter is drilled in the center of the body 1.

The central gas 5 is drilled with a main gas communication hole 6 and an ignition gas communication hole 7 facing in the radial direction, and an outer end of the main gas communication hole 6 is axially rotated in an arcuate plane. The communication groove 8 extending in the circumferential direction, that is, the transverse direction, of the hibernation surface 2 is cut out, and on one side of the communication groove 8, the narrow communication groove 9 which extends in the horizontal direction is spoken.

Thus, the ignition gas communication hole 7 is cut laterally so that the communication groove 10 in the form of an inverted die in the axial direction is cut.

The grease stops 11, 12 and 13 are positioned axially relative to the communication grooves 8 and 10 at positions circumferentially about 90 degrees from the center of the communication holes 6 and 7. Is provided so as not to overlap the gap between each of the grease stop (11, 12, 13) is formed for sealing the gas.

That is, the communication grooves 8, 10 and the three grease stops 11, 12, 13 are installed so as to overlap in the axial direction of the body so that the communication groove 8 is in the axial direction of the rotational sliding surface 2. (10) and grease stops (11) (12) (13) must be present so that the communication grooves (8) and (10) also act like grease stops, so that all lengths in the axial direction of the rotary contact surface (2) The grease stop is provided.

Again, a gap remains between both ends of the rotary sliding surface 2 and the outer ends of the grease stops 11, 12 and 13, but the gap is cut laterally so that the grease stops 11, 12 ( The end of 13 may extend to reach the end of the rotary sliding surface 2.

Each grease stop 11, 12, 13 is machined by a bowl-end mill as described below, and as shown in FIGS. 4 and 5-7, the grease stop 11 ( 12) (13) is formed in a circular spherical spherical shape in both the axial direction and the circumferential direction so that the spherical surface and the conical rotating sliding surface 2 intersect, and as shown in FIG. It is long oval.

When the rotating sliding surface 2 is cylindrical, it becomes a symmetric long ellipse shape.

In any case, each grease stop has a true diameter D ₁ and a short diameter D ₂ , as illustrated in the grease stop 12, with the long diameter D ₁ facing the axial direction of the body 1.

Thus, the angle formed by the hole surfaces of the grease stops 11, 12 and 13 and the rotary sliding surface 2 is as small as possible, and the angle A in the axial direction is 60 degrees or less and the angle B in the circumferential direction is 40 degrees. As mentioned above, the edge formed in the outer periphery of grease stop part 11 (12) 13 by these angles becomes obtuse angle.

8 shows the principle of the processing device of the grease stops 11, 12, 13, where 20 is a turntable that rotates about the center 21, and the connection of the body 1 A fastening hole 22 of a material for fitting 4) is provided, and the fastening hole 22 is provided in the fastening hole 22, and the divided groove 4a of the body 1 is provided in the protrusion 23. ) Is engaged so that the body 1 is held in a constant direction.

On the upper side of the turntable 20, a holding means other than that shown in the figure is rotated together with the turntable 20 by pressing the body 1 from above.

A machining device for cutting the communication grooves 8, 9, and 10 and a machining device for cutting the grease stops 11, 12, 13 are provided around the turntable 20.

In the figure, 24 to 26 are the price cutters, 24 are for the communication grooves 8, 25 are for the communication grooves 9, and 26 are the communication grooves 10.

Thus, (27) and (28) are the bowl end mills 27 for the grease stop 11 at the tip side, 28 for the grease stop 12 at the center, and 29 at the base grease stop. It is for the part 13.

Each bowl end mill (27) (28) (29) has its center line (27 ₁ ) (28 ₁ ) (29 ₁ ) in the direction of arrow ① and set in the direction away from the center line of the body (1) and arrow ② direction The grease stop is cut by the rotation of.

The bowl end mill performs spherical cutting. Even if the feed direction is not perpendicular to the rotational sliding surface 2, the concave portion of the spherical shape is cut off, which causes the lengths shown in FIGS. 2, 5, 6, and 7 An ellipse is provided with a grease stop which becomes an arcuate spherical surface in cross section.

The center line at the time of cutting the cutting speed is also in the vicinity of the turn (27 _{1-29 1)} is extremely slow, so that only part of the cutting also does not use a cutting using only a faster cut turning and in the eccentric position of the cutting good It is done.

The transport of the bowl end mills 27 and 28 may be performed in the direction of arrow 3 without the direction of arrow ①, or may be performed in two stages of arrow ① ③.

Incidentally, the inclination angle θ of the arrow ① with respect to the radial line of the turntable 20 may be larger or smaller than the angle shown, or θ may be zero.

The drive device for driving the bowl end mills 27, 28 and 29 may be disposed substantially radially on the outside of each center line 27 _{1 to} 29 ₁ , so that the intervals in the circumferential direction may be narrower than those shown. For example, from the price cutter 24 to the bowl end mill 29 can be arranged in a semicircular shape.

Instead of the arrangement described above, use a tool with a gradual cut in the shape of the tip, such as a twist drill or bowl end mill, and move the tool in the direction of arrow ④, ie perpendicular to the rotary sliding surface 2 of the body 1. You may arrange | position so that it may face.

However, this arrangement causes the drive of the tool to extend in the tangential direction, so if the spacing of the fastening holes 22 is narrowed, tools and drives adjacent to each other are likely to cause interference, and the bowl end mill as shown in FIG. It is advantageous to arrange them.

31, 32, and 33 are conventional twist drills having a gradual cutting degree in the form of cones, and each of the twist drills 31 to 33 forms a conical grease stop, but the contour of the grease stop is It has a long oval shape as shown in FIG.

Even if the bowl end mill is used in the same arrangement as the twist drills 31 to 33, the one having a round spherical recess in the same contour is cut.

When the tool is placed in this way, the central part of the turning speed is in contact with the rotational sliding surface of the body 1, so that the cutting resistance is large, but the setting of the positioning feed amount of the tool is easy and the tool cost is low when using a twist drill.

As is clear from the above description, since the center part is long and the center part is deep, the air tightness in the circumferential direction is long, and the greedy elongated grease receiving space is formed, so that a large number of greases can be accommodated even with a few grease stops. At the short end, the axial tightness is also maintained.

In addition, according to the means of claim 2, since the rough edge is not formed on the outer circumferential surface of the grease stop of the body 1, there is no fear that a wound will occur between the inner surface of the valve body.

The grease stops are long and elliptical, so the airtightness in the same direction is good, and long grease receiving spaces are formed in the axial direction, so that a large number of greases can be accommodated even with a few grease stops. Since the space | interval exists in this axial direction, airtightness is also favorable.

Thus, there is an advantage that it can be easily processed with a bowl end mill, twist drill and the like.

According to the means of claim 3, the grease stop and the communication groove are provided with the grease storage and foreign matter can fall into the over the entire length of the body and the gas-lubrication gas is good.

According to the means of claim 4, the cutting speed of the bowl end mill can be cut quickly and satisfactorily, and spherical cutting can be performed at any part of the cutting degree. It is possible to install the processing equipment even in a narrow and wide range of installation angles.

According to the means of claim 5, various tools including twist drills can be used, and the position feed amount of the tool is simply determined by the position and depth of the grease stop on the body, so that the operation of the processing device is easy.

Claims (5)

A gas valve body having a rotary sliding surface and a gas flow communicating groove formed in the rotary sliding surface, wherein the width of the body in the circumferential direction is narrow and is long in the axial direction at a position circumferentially away from the communication groove. A gas valve body having a plurality of grease stops with a deep central portion installed in a line with an interval in the axial direction of the body. In the body of the gas valve, the communication groove of the rotary sliding surface and the gas flow formed in the rotary sliding surface, a long oval shape concavely recessed in a gentle inclined surface on the rotary sliding surface at a position circumferentially away from the communication groove. A plurality of grease stops of the gas valve body, characterized in that the elongated diameter is installed in a line in the axial direction of the body. The gas valve body according to claim 1 or 2, wherein the communication groove and the grease stop are provided in different axial positions. A method of processing a body of a gas valve, characterized by cutting several grease stops by fixing the material of the body to the holding device and touching the material with the eccentric position of the tip of the bowl end mill. The gas valve is characterized by cutting several grease stops by fixing the material of the body to the holding device and bringing a tool with a slanted cut in the form of a slope to the vertical contact with the rotational sliding surface of the material. Body processing method.