JPS5934084A - Closing valve - Google Patents

Abstract

PURPOSE:To enable a valve body to be locked in a fully open and a totally closed position while preventing erroneous operation by forming a protrusion on the outer periphery of the projecting part of a valve stem and locking the protrusion in a state that it is brought in contact with the stopper of a valve box due to the recess of a locking member. CONSTITUTION:A valve stem 6 is turned either to fully open or totally closed condition, before a locking member 21 is fitted to the valve stem 6, a first recess 22 is engaged with the stopper 8 and either end 7b or 7a of a pin 7, a ball 3 is locked through the valve stem 6, the locking member 21 is fixed by screwing a cap nut 9 onto an external-thread cylinder 5, and the periphery of the valve stem 6 is sealed. In this way, imperfect opening and closing can also be prevented since the recess 22 to 24 of the locking member 21 are not engaged with the stopper 8 and the pin 7 except when the valve is in fully open or totally closed condition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an on-off valve, and particularly to an RV whose valve body can be fixed in a fully open state and a fully closed state.

[Technical weight of the invention]

For example, in a nine-refrigeration separate type air bay phase machine, an on-off valve is used to open and close the flow of refrigerant.

[Problems with background technology]

The above-mentioned on-off valve operates the valve body inside the valve body to open or close by rotating the valve stem protruding from the valve body, but the valve body is fixed in the fully closed or fully open state. No particular means was provided, and the position of the valve body was simply determined by the frictional resistance of the valve body and valve stem. Therefore, when the pressure of the fluid is high, the −/P body is easily affected by it;
For example, if a ball-shaped on-off valve is used in an air conditioner, it may not be able to completely close the flow of refrigerant when not in use, or it may be incompletely opened during operation, resulting in a large pressure loss. In particular, when sudden pressure fluctuations occur, the valve body may become unstable, and the valve body may become unstable during operation. It is also conceivable that the system may become closed and become inoperable.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned points, and the present invention has been made in view of the above-mentioned points.
It is an attempt to remain firmly attached to the situation.

[Loading of invention]

The present invention provides an on-off valve in which a valve body protruding from a valve body changes between a fully closed state and a fully open state by rotating a predetermined angle tζ. [Protrusions are formed and the valve body 1c is formed]: Forms a stopper having two ends that the protrusions come into contact with when the valve body is in a fully closed state and a fully open state, respectively, and prevents the protrusion of the valve stem. forming a recess that engages with the stopper and the protrusion that abuts the end of the stopper on the edge of the cylindrical locking member that fits into the stopper;
The locking member is characterized in that the protrusion is fixed in contact with the upper H11 stopper by the recessed part of the locking member, and the valve body can be fixed in the fully closed and fully open states with a simple structure. 5K to prevent malfunctions and erroneous operations of on-off valves.

[Embodiments of the invention]

Next, the on-off valve of the present invention will be specifically explained based on an embodiment shown in the drawings.

Figures 11 and 2 of the bottle show a ball box type on-off valve.

In the figure, il+ is a valve box, and a communication hole (2) is provided in the center of the valve case 11) with both ends υ110. The ball (t3+h) is arranged with its periphery sealed, and this ball (3) is formed with a through hole (4) b- having the same diameter as the through hole (2) described above.

The ball (3) is connected to the valve body (3) which protrudes from a male thread (5) integrally formed on the outer peripheral side of the valve shaft (11).
6) rotates in a line-and-line manner with this valve stem (6), thereby connecting the through hole (4) with the 3ff through hole (2) K. Let me ball (3
) is in an open state, and the ball (3) is turned in a closed state by directing the through hole (4) in a direction intersecting with the communication hole r2+.

Further, a bottle (force is applied to the through hole (4) as a protrusion in the protrusion of the valve body (6) close to the end face of the male threaded cylinder (5) is provided.
), and both ends (7a) (7k)h
A fan-shaped stopper (8) is placed on the end surface of the male threaded tube (5).
is formed, and by this stopper (8)K, valve n(6)
The rotation range is the fully open state where the through hole (4) completely communicates with the communication hole (2), and the fully open state where the through hole (4) is in communication with the communication hole (2) K.
The angle is limited to 90° between the fully closed state and the direction perpendicular to the opposite direction.

In other words, when one end (7,) of the bottle (7) is in contact with one end (8a) of the stopper (8), the ball (3) is fully closed, as shown by the solid line in the figure. If the valve stem (6) is excited 900 times in the counterclockwise direction from this state, the ball (3) will be in the all u;1 state, and in this state, K, as shown by the two-dot chain line, The other end of the screw (7) (7k)
comes into contact with the other end (8) of the stopper (8).

lI, the angle θ at which the stopper (8) is provided is the width (chord) of the bottle (7) at the part that contacts the stopper (8).
b'' - Angle around the central axis of rotation of the valve stem (6) (
(The value obtained by subtracting 2 from 90°, θ=90°−α.

In addition, the two sides of the protruding part of the valve stem (6) at the part where the both end parts (7a) (7, 8) of the bottle (force) protrude are cut out and formed flat, and this part Engage an appropriate tool such as a spanner to rotate the valve stem (6) at 1: '1 K, and after the operation.

A K-cap nut (9) is screwed onto the paper screw tube (5) to prevent fluid from leaking around the valve stem (6).

In addition, "On" is installed in the -p bulkhead 15 of the secondary distribution hole (2).
The raised contact E4a is used to connect the pipe 01), and a2 is a cap that has a connection part for the pipe a'3 in its center, and after installing the ball (3) etc., ,
This is for sealing the sacral end of the valve lees il+.

In addition, Figures 3 and 4 show the locking member for closing the 1514 valve mentioned above.

This locking member QD is formed into a cylinder '4k with a circular diameter that fits into the protruding part of the valve stem (6), and has a recess (C) (C) 2.11 of 311 to 2/3 on its edge. It is formed.

The concave portion Q2 of the above 3. or one end (7,) or the other end (7k) of said bottle (7) in contact with the other f47fli (84)
In addition, the recesses Q31 (c) of the three doors 2 and 13 are respectively connected to the recesses of the above formula 1.
(Further angle from 221 to 90° position (possible range & I
lyc shadows are formed, respectively at one end (7a) of the force in the fully open condition and of the bottle (7k) in the fully open condition, i.e. in the fully open or fully closed condition. Above stopper (814C facing l)
(7) σ) end C/, ) or ('74).

The length of this locking member (211) is smaller than the inner diameter of the cap nut (9), and its length is such that the cap nut (9) is completely screwed into the paper screw drawer (5). and after screwing, the stopper (8) and the bottle (from the force, the recess ζΔ
(c) The dimensions are such that r2.0 does not come off.

When sweeping the on-off valve, the valve stem (6) is rotated to the fully open or fully closed state, and then the valve is locked.
Material c! Valve D 441 (61K ft, Goshi C Sono'
A'I) locks the ball (3) through the valve stem (6) by engaging the concave stopper (8) with the end (7k) or (7,)) of the pin c; One bag nut (9) is screwed into the male threaded cylinder f51 to fix the locking member C20 and seal the area around the valve stem (6). In addition to the action of locking in the fully closed state, the concave part ('2 (231f, 'i1 does not engage the stopper (8) and the bottle (77K) This prevents incomplete opening and closing.
When used in an air conditioner, it can prevent erroneous operation of opening/closing 4F and incomplete FC opening/closing, prevent a decrease in capacity σ] or become unable to operate during operation, and furthermore, the locking member ( 21) has a simple shape and can be made at extremely low cost.

In the above embodiment, each recess 1 of the locking member OD: B 231 m,! 4) Lock member (21)
Although it is formed on one end edge, it is not limited to this, and the lock member (like 3υ, 3'2 and 3's recessed part &31 e4) shown in Figure 2 Noah and Figure A/8 can be formed on both ends of the lock part side c31). In addition to forming the edges VC separately, corresponding to the thinning 14) of the locking member 6υ, a recess 0z of p1 is formed in the form filUL, and the opening/closing valve is fully open and fully open. When in the closed state, different ☆; Ai edges of the lock member c31) may be set on the stopper (8) and the bottle (7), and in this case, VC is set on the lock part side 00 in the fully open state and fully closed state. A display showing the direction of the locking member 0υ is provided so that the open/closed state of the opening/closing valve can be determined at a glance from the display of the locking member 6υ.

Furthermore, in the embodiment described above, rdM'# of bin (7)
Although U Ml<(7,) (74) is provided for the stopper (8), the present invention is not limited to this.
Alternatively, only (7J) may be made to melee (8)K, in which case e( is, stopper (8) is (27)
The second and third recesses of the locking member 01) may be provided in the range of 0'-α). JC pull is not necessary.

〔Effect of the invention〕

As described above, according to one aspect of the present invention, when opening and closing the on-off valve, the locking member can prevent erroneous operations such as incomplete opening and closing, and the y-cotton valve can be set in the fully open state a or the fully open state. For example, when the on-off valve is used in an air 1
Moreover, the locking member has a simple shape (and is inexpensive).
can.

[Brief explanation of the drawing]

3710, ``A76 shows one embodiment of the present invention, and Figure 1 is a plan view of a ball-shaped opening/closing valve.
Figure 2 is a side view, and Figure 3 is a diagonal view of the locking member.
Figures 1/4 and 1/4 are bottom views of the locking member, Figures 5 and 6 are perspective views of the main parts to explain their functions, and Figures 3/7 and 8 are the lock members. 317 is a perspective view of the locking member, 'AI
Figure 8 is its bottom view. 11)... Valve box, (3)... Ball as valve body, (6
)--Valve (-1 (7)... Projection tube 1 and [7 bottles, (
8)...stopper, (8J(84)-one end %CD)
Meeting lock member, mortar/11 recess. August 18, 1967 Inventor: Yudo Matsumoto - Yudo Hayashi
Tsutomu Kato Percentage Applicant Mitsubishi Heavy Industries Co., Ltd. 1 Nichidenko Kuwa Co., Ltd.

Claims (1)

[Claims] tit In an on-off valve in which the valve body changes between a fully closed state and a fully open state by rotating the valve stem protruding from the valve body a predetermined angle, A stopper is formed on the outer periphery of the valve body, and the valve body has a stopper having two ends that the protrusions come into contact with when the valve body is in a fully closed state and a fully open state, respectively.
B. A concave portion is formed on the edge of the cylindrical locking member that fits into the protrusion of the valve stem to engage with the stopper and the protrusion that abuts the 91M portion of the stopper, and An opening/closing valve in which the stopper V (the protruding part) is fixed in the abutting state by four parts.