JPH09133248A - Manual opening/closing valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manual opening/closing valve which can be manufactured with comparatively ease and at low cost without requiring a high machining technique that a female screw part is formed inside a valve main body and so on, and in which a valve element can be retained by being certainly locked in two closing/opening positions, and also the position of the valve element can be changed extremely easily and rapidly. SOLUTION: This manual opening/closing valve is formed by being equipped with a valve main body 11 having a pair of fluid flowing in/out connecting openings 12, 13, a valve element arranged to be rotated and moved in the valve main body 11, and a guide retaining member 40 which has guide locking grooves 41, 42 in which locking projected parts 21, 22 projected in the side circumferential part of the valve element are inserted, and by which the valve element can be retained by being locked in two positions of a closing position for disconnecting between the connecting openings 12, 13, and an opening position for connecting therebetween.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual on-off valve, and in particular, shuts off an inlet / outlet of an outdoor unit of a refrigerant circulation passage which is attached to an outdoor unit of an air conditioner and connects it with an indoor unit before installing the air conditioner. In particular, the present invention relates to a manual opening / closing valve such as a valve that is operated so as to communicate with each other during installation.

[0002]

2. Description of the Related Art As a conventional example of this kind of manual on-off valve,
There is one as shown in FIGS. 5 and 6. The manual on-off valve 50 of the illustrated example has a valve body 51 having a substantially T-shaped sideways shape, and in the valve body 51, a pair of connection ports (refrigerant inlet / outlet) for fluid inlet / outlet orthogonal to each other. 52 and 53 are provided and a spool type valve element 60 with a male thread is provided.
Are rotatably arranged around the axis.

The inner peripheral portion on the lower end side of the one connection port 52 is connected and fixed to the conduit 76 disposed on the outdoor unit side of the air conditioner by silver brazing or the like, and a joint is provided on the outer periphery of the other connection port 53. A male screw portion 58 for screwing is formed, and a top hat type cap 78 for preventing dust and the like from entering the inside before the installation of the air conditioner so as to elastically press contact with the male screw portion 58. It is detachably attached.

A valve seat 55, on which the tip conical surface portion 62 of the valve element 60 is seated, is provided above the connection port 52 on the outdoor unit side in the valve body 51, and the connection port 53 on the indoor unit side is provided thereon. A female screw portion 54 to which a male screw portion 64 formed on the intermediate side peripheral portion of the valve element 60 is screwed is provided in the vicinity of the intersection with and, and a male screw portion 57 is formed on the outer peripheral portion thereof. A cylindrical sliding portion 56 is provided. A retaining ring 74 with which the upper end of the valve element 60 is pressed into engagement is fitted into the cylindrical sliding portion 56, and a male screw portion 57 on the outer periphery thereof is fitted with a female screw formed on the inner periphery of the cap nut 70. The part 72 is screwed together. Further, a caulking portion 59 is provided at the upper end of the tubular sliding portion 56 to prevent it from coming off.

The cylindrical sliding portion 56 has the valve element 60.
An O-ring 75, which is made of an elastic material such as rubber, is externally fitted to the fitting insertion portion 66 that forms the upper part of the above, and is slidably pressed. A hexagonal fitting hole 68 for rotation into which a hexagonal bar wrench 80 (FIG. 6) is fitted is bored inside the fitting insertion portion 66 of the valve element 60. In the manual on-off valve 50 having such a configuration, before installation of the air conditioner (at the time of shipment from the factory), as shown in FIG. 5, the valve element 60 has its tip conical surface portion 62 seated on the valve seat 55. The closed position (lowermost position) that shuts off the connection between the connection port 52 and the connection port 53 is taken.

On the other hand, when the air conditioner is installed, as shown in FIG. 6, the cap 78 capped on the connection port 53 located on the indoor unit side is removed to separate the outdoor unit from the indoor unit. A conduit (flexible tube or the like) 82 serving as a refrigerant circulation passage is connected by an appropriate pipe joint 81, and the cap nut 70 screwed to the outer periphery of the upper portion of the tubular sliding portion 56 is also temporarily removed. (Valve element 60 is screwed back in after setting in the open position as described below).

Then, the hexagonal bar wrench 80 is fitted in the turning hexagonal fitting hole 68 formed in the inside of the fitting insertion portion 66, and the entire valve element 60 is rotated about its axis. By the screw feeding by screwing the female screw portion 54 and the male screw portion 64, it is moved upward from the closed position shown in FIG. In this case, finally, as shown in FIG. 6, the valve element 60 is moved to a position where the upper end of the fitting insertion portion 66 is brought into pressure contact engagement with the retaining ring 74, and the tip conical surface portion. 62 is separated from the valve seat 55 by a required distance, and the valve element 60 completely opens the connection between the connection port 52 and the connection port 53.
The refrigerant is circulated and is set in a state in which the refrigerant can be circulated.

[0008]

However, in the conventional manual on-off valve 50 as described above, the valve element 60 is used.
The male screw portion 64 is formed on the inside of the valve body 51, and the female screw portion 54 is formed on the inside of the valve body 51. Particularly, forming the female screw portion inside the valve body requires a high processing technique, which significantly increases the product cost. In addition, it is necessary to rotate the valve element many times to move the valve element from the closed position to the open position, and there is also a problem that it takes time and time to change the position of the valve element. there were.

The present invention has been made in view of the above problems, and its object is to eliminate the need for a high-level processing technique such as forming an internal thread portion inside the valve body.
It can be manufactured relatively easily and inexpensively, and moreover, the valve element can be securely locked and held at two positions, a closed position and an open position, and the position of the valve element can be changed very easily and quickly. The purpose is to provide a manual on-off valve.

[0010]

In order to achieve the above object, a manual on-off valve according to the present invention is basically a valve main body having a pair of connection ports for fluid entry and exit, and a valve main body in the valve main body. It has a valve element arranged in a movable state and a guide locking groove into which a locking projection protruding from the side periphery of the valve element is inserted, and the valve element is cut off between the connection ports. And a guide holding member capable of being locked and held at two positions, that is, a closed position and an open position communicating with the guide holding member.

In a preferred mode of the manual on-off valve of the present invention, the valve element is of a spool type and is movable in the axial direction and rotatable about the axis, and the valve element is opened. A device provided with a spring for urging to the position side, a fitting hole for rotation, a fitting groove, or a fitting convex portion for fitting a turning tool such as a spanner or a screwdriver to the valve element. Formed, the guide holding member is made of a sheet metal bent in a cylindrical shape, the pair of connection ports are arranged orthogonally, and the valve element passes through the intersection of the connection ports. And the distal end portion is slidably inserted into one of the pair of connection ports to close the connection port.

The manual on-off valve according to the present invention having such a structure is mounted on, for example, an outdoor unit of an air conditioner, and the inlet / outlet of the outdoor unit side of the refrigerant circulation passage connecting the indoor unit with the outdoor unit is installed before installing the air conditioner. It is operated so that it will be shut off and communicated during installation. That is, for example, before the installation of the air conditioner (at the time of factory shipment), the locking projection protruding from the valve element is locked and held at one end of the guide locking groove of the guide holding member so that the valve element is connected in a pair. The closed position (lowermost position) that shuts off the mouth (entrance / exit) is taken.

On the other hand, when the air conditioner is installed, for example, a rod spanner or the like is fitted in a fitting hole for rotation formed in the valve element, and the entire valve element is rotated about its axis. As a result, the valve element is moved (raised) in the axial direction by the biasing force of the spring while the locking projection is guided by the guide locking groove, and finally the locking projection is guided and locked. The valve element is moved to the other end of the groove to be locked and held, and the valve element is set to the open position (maximum lifted position) for completely communicating between the pair of connection ports, whereby the refrigerant can be circulated. It

By doing so, it is only necessary to attach a sheet-metal guide holding member or the like that can be relatively easily manufactured, without requiring a high-level processing technique such as forming an internal thread inside the valve body. Therefore, it can be manufactured at a lower cost than the conventional screw type, and it can be moved to two positions of the closed position and the open position simply by rotating the valve element with an ordinary tool such as a bar spanner. The position can be changed extremely easily and quickly as compared with the conventional screw type, and the valve element can be securely locked and held at two positions.

[0015]

1 shows a closed state of an embodiment of a manual on-off valve according to the present invention. The manual on-off valve 10 of the present embodiment is the manual on-off valve 5 shown in FIG. 5 described above.
As with 0, it is installed in the outdoor unit of an air conditioner and is operated so that the inlet / outlet of the outdoor unit side of the refrigerant circulation passage that connects it to the indoor unit is shut off before installing the air conditioner and communicated during installation. Then, the valve body 11 has a substantially T-shaped valve which is substantially laid down, and a pair of connection ports (refrigerant inlet / outlet) 1 for fluid inlet / outlet are provided in the valve body 11 so as to be orthogonal to each other.
2 and 13 are provided.

The inner peripheral portion of the lower end side of the one connection port 12 is connected and fixed to the conduit 76 disposed on the outdoor unit side of the air conditioner, for example, by silver brazing, and the outer periphery of the other connection port 13 is a joint. A male screw portion 18 for screwing is formed, and a top hat type cap 78 for preventing dust and the like from entering the inside before installation of the air conditioner so as to elastically press contact with the male screw portion 18 is detachable. It is possible to wear it.

A spool-shaped valve element 30 as shown in FIG. 2 is arranged in the valve body 11 so as to be movable in the axial direction and rotatable about the axis, and the outdoor unit in the valve body 11 is arranged. At the upper part of the side connection port 12, the valve element 3 is provided.
The O-ring 23 fitted externally to the groove between the 0 large diameter portion 32 and the intermediate portion 34 having the same diameter is elastically and slidably pressed.

A tubular sliding portion 14 is provided above the connection port 12 in the valve body 11, and an intermediate portion 34 of the valve element 30 corresponding to a lower portion of the tubular sliding portion 14 is provided.
A coil spring 35 for urging the valve element 30 upward in the axial direction is provided between the collar-shaped portion 34a provided on the upper end and the upper end peripheral portion of the connection port 12. Further, on the upper portion of the tubular sliding portion 14, the collar-shaped portion 3 of the valve element 30 is provided.
An O-ring 24 externally fitted in a groove portion between 4a and a fitting insertion portion 36 having the same diameter is elastically and slidably pressed. A hexagonal fitting hole 38 for rotation into which a hexagonal bar wrench 80 (FIG. 3) is fitted is formed in the fitting insertion portion 36 of the valve element 30, and the hexagonal fitting hole 3 for rotation is formed.
A conical surface portion 39 (see FIG. 2) is formed on the upper side of 8 to facilitate insertion of the hexagonal wrench 80.

A tubular mounting portion 16 is provided further above the tubular sliding portion 14 in the valve body 11, and inside the tubular mounting portion 16 is a tubular guide holding described later. The male screw portion 17 in which the member 40 is fitted in and the female screw portion 72 of the cap nut 70 is screwed onto the outer peripheral portion.
Are formed. The tubular guide holding member 40 is shown in FIG.
As can be seen from the above, a sheet metal is bent into a cylindrical shape, and a starting end and a terminal end in the circumferential direction are separated by a gap 44 to obtain a spring property in the radial direction. The tubular guide holding member 40 is provided with a pair of guide locking grooves 41 and 42 at point symmetrical positions which are 180 degrees apart from each other in the circumferential direction with the gap 44 interposed therebetween.

Correspondingly, the guide locking grooves 41, 42 are provided on the upper portion of the fitting portion 36 of the valve element 30 on the same plane, and the pair of locking convex portions 21 are projected 180 degrees apart from each other. , 22 for guiding and locking, and central inclined guide portions 41A, 42A inclined about 30 degrees with respect to the axis,
Lateral guide portions 41B, 42B and 41C, 42C extending laterally in opposite directions (horizontal direction) from the lower and upper ends of the central inclined guide portions 41A, 42A, and these lateral guide portions 41B, 42B and 41C, Arc-shaped locking recesses 41b, 42b and 41 formed on the upper surface of the end portion of 42C.
c and 42c.

Further, a pair of rectangular fixing notches 45 and 46 are formed on the upper portion of the tubular guide holding member 40 at positions 180 degrees apart from each other in the circumferential direction with the gap 44 interposed therebetween. As shown in FIG. 4, the fixing notches 45 and 46 have locking pieces independent of the caulking portion 26 protruding from the upper portion of the cylindrical mounting portion 16 for preventing the retainer and the rotation. The parts 27 and 28 are folded.

Here, the guide locking grooves 41, 42 and the fixing notches 45, 46 are formed all at once by punching press working etc. in a flat plate state, and if the punched sheet metal is rolled into a cylindrical shape, it is guided. Since the holding member 40 is formed, the guide holding member 40 can be manufactured very easily and inexpensively. In the manual on-off valve 50 of the present embodiment having such a configuration, before the air conditioner is installed (at the time of shipment from the factory), as shown in FIG. The locking projections 21 and 22 thus formed are locking recesses 41b and 42b on the lower end sides of the guide locking grooves 41 and 42 of the guide holding member 40, respectively.
The O-ring 23, which is locked and retained by the valve element 30 and is fitted around the tip of the valve element 30, is press-fitted to the connection port 12 to hermetically close the connection port 12, and the valve element 30 is connected to the connection port. 12-Closed position that shuts off between connection port 13 (lowermost position)
Have been captured.

On the other hand, when the air conditioner is installed, as shown in FIG. 3, the cap 78 capped on the connection port 13 located on the indoor unit side is removed to separate the outdoor unit from the indoor unit. A conduit (flexible tube or the like) 82 serving as a refrigerant circulation passage is connected by an appropriate pipe joint 81, while the cap nut 70 screwed to the outer periphery of the tubular mounting portion 16 is also temporarily removed (valve). The element 30 is screwed again after setting it in the open position as described below).

Then, a hexagonal bar wrench 80 is fitted in the rotating hexagonal fitting hole 38 formed in the inside of the fitting insertion portion 36, so that the valve element 30 as a whole is rotated 40 degrees to 50 degrees around its axis. It can be rotated about a degree. As a result, the locking projections 21 and 22 are locked into the locking recesses 41 of the guide locking grooves 41 and 42.
While being separated from b and 42b, they are moved (raised) in the axial direction by the biasing force of the coil spring 35 while being guided by the central inclined guide portions 41A and 42A through the lateral guide portions 41B and 42B, and finally, as shown in FIG. As shown in FIG. 5, the locking projections 21 and 22 move through the lateral guide portions 41C and 42C and move to the locking recesses 41c and 42c on the upper end side of the guide locking grooves 41 and 42 to be locked and retained, and The element 30 is in an open position (maximum lifted position) that allows complete communication between the connection port 12 and the connection port 13.
Is set, so that the refrigerant can be circulated.

When it is necessary to remove the conduit 82 connected to the connection port 13 due to transfer or the like, the hexagonal bar wrench 80 is fitted into the turning hexagonal fitting hole 38 of the valve element 30 again. The valve element 30 is put together and pushed downward while rotating the entire valve element 30 about its axis, so that the valve element 30 is set to a closed position (lowermost position) that shuts off between the connection port 12 and the connection port 13. To be done.

By doing so, the valve body 11
It does not require a high-level processing technology such as forming an internal thread inside, and only needs to be attached with a sheet metal guide holding member 40 or the like that can be relatively easily manufactured. It can be manufactured at low cost, and can be moved to two positions, a closed position and an open position, by simply rotating the valve element 30 with an ordinary tool such as a bar wrench, and the position change is the conventional screw type. It is extremely easy and quicker than the above, and the valve element can be securely locked and held at two positions.

In the above example, the valve element is provided with the rotating hexagonal fitting hole 38 into which the rectangular rod-shaped spanner is fitted, but in place of it, other spanners, drivers, etc. , A fitting hole for fitting, a fitting groove for fitting, such as + shape, − shape, square shape, etc.
Alternatively, a fitting convex portion may be provided.

[0028]

As can be understood from the above description, the manual on-off valve of the present invention can be relatively easily manufactured without the need for a sophisticated processing technique such as forming an internal thread inside the valve body. Since it is only necessary to attach a guide holding member etc. made of steel, it can be manufactured at a lower cost than the conventional screw type, and it can be closed by rotating the valve element only slightly with an ordinary tool such as a bar spanner. It can be moved to two positions, open position and open position, and its position can be changed very easily and quickly compared with the conventional screw type, and the valve element can be securely locked and held in two positions. It has an excellent effect.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a closed state of an embodiment of a manual on-off valve according to the present invention.

2 is an exploded perspective view of a guide holding member and a valve element of the manual on-off valve shown in FIG.

FIG. 3 is a sectional view showing an open state of the manual on-off valve shown in FIG.

FIG. 4 is a closed state of the manual on-off valve shown in FIG. 1 (FIG. 3).
FIG.

FIG. 5 is a sectional view showing a closed state of an example of a conventional manual on-off valve.

6 is a cross-sectional view showing an open state of the manual on-off valve shown in FIG.

[Explanation of symbols]

 10 Manual on-off valve 11 Valve body 12, 13 Connection port 21 Locking convex part 23, 24 O-ring 30 Valve element 35 Coil spring 38 Rotating hexagonal fitting hole 40 Guide holding member 41, 42 Guide locking groove

Claims (6)

[Claims] 1. A valve main body having a pair of connection ports for fluid entry and exit, a valve element movably arranged in the valve main body, and a locking member projecting from a side peripheral portion of the valve element. A guide locking groove into which the convex portion is inserted is provided, and the guide locking groove holds and holds the valve element in two positions, a closed position for disconnecting between the connection ports and an open position for communicating with each other. A manual opening / closing valve, comprising: 2. The manual on-off valve according to claim 1, wherein the valve element is of a spool type and is movable in the axial direction and rotatable about the axis. 3. The spring according to claim 1, further comprising a spring that biases the valve element toward the open position.
Manual on-off valve described in. 4. A turning fitting hole, a fitting groove, into which a turning tool such as a wrench or a screwdriver is fitted to the valve element,
Alternatively, the fitting convex portion is formed, and the manual on-off valve according to any one of claims 1 to 3. 5. The manual on-off valve according to claim 1, wherein the guide holding member is made of a sheet metal bent in a cylindrical shape. 6. The pair of connection ports are arranged orthogonally to each other, the valve element is disposed so as to pass through an intersection of the connection ports, and a tip end thereof slides on one of the pair of connection ports. The manual on-off valve according to any one of claims 1 to 5, wherein the manual on-off valve is freely inserted and closed.