JPS6220775Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a shutoff valve for a room cooler, which is disposed in the middle of a refrigerant pipe such as a separate room cooler.

(Prior art) Conventionally, as an example of this type of shut-off valve for a room cooler, a valve main body formed integrally has an inside piping port and an operation port facing each other in the vertical direction, and an outside piping port and a charge port. Ports are opened horizontally facing each other at right angles to the in-machine piping port and the operation port, and a valve body for opening and closing the in-machine piping port is disposed within the valve body and connected to the valve body on its upper outer periphery. A sealing member is fitted to airtightly seal the space between the two, and the valve core is fitted into the charge port. The refrigerant is hermetically sealed inside the outdoor unit, and during air purge, etc., air is purged from the charge port by operating the valve core with the inside piping port closed, and when the cooler is operating, etc. It is well known that the piping port inside the machine is opened by screwing it up to communicate with the piping port on the outside of the machine (for example, Japanese Utility Model Publication No. 55-26770 or Japanese Utility Model Application Publication No. 53-1999).
(See Publication No. 23952).

However, in this conventional shut-off valve, the valve body is integrally formed, so it has good sealing properties and gas leakage is difficult to occur, and since the charge port is opened and closed by the valve core, the charge port is opened and closed by the valve body. However, on the other hand, since the valve body is inserted through the operation port of the valve body and screwed together to assemble the two, the valve body inevitably becomes It had to have a tapered shape, and the valve diameter (inside piping port) was small compared to the size of the valve body, resulting in a large pressure loss. Therefore, in order to reduce this pressure loss, it is necessary to increase the size of the valve body, which poses the problem of increasing the size of the valve.

Therefore, in the above-mentioned shut-off valve, an improvement has been made in which a packing box is airtightly fitted into the operating port of the valve body, and a sealing member is used to seal between the inner periphery of the packing box and the outer periphery of the valve body. Therefore, it is possible to use a valve body with a tapered shape, thereby ensuring a large valve diameter and reducing the size of the valve while reducing pressure loss.

By the way, in this type of shutoff valve, the operation section for opening and closing the valve body by moving it up and down relative to the valve body extends toward the operation port side of the valve body.
In order to ensure the movement stroke of the operating portion of the valve body, it is necessary to increase the height of the valve body, and as a result, there is a problem that the valve height of the closing valve becomes large.

Therefore, in order to solve this problem, conventionally, as shown in FIG. A closing valve comprising a main body a and a valve body f that is fitted into the valve body a from the operation port c and opens and closes the machine interior piping port b, facing the operation port c of the valve body a. On the upper surface of the valve body f, there is an upper half k ₁ and a lower half k ₂ having a smaller diameter than the upper half k ₁ .
An _{operating hole k with a hexagonal cross} section consisting _of An operating shaft j having a hexagonal cross section is provided. and,
When opening and closing the valve body f, as shown in the figure, the operating shaft j
Insert the large diameter part j ₁ of the operating shaft j into the upper half k ₁ of the operating hole k to make the small diameter part j ₂ of the operating shaft j protrude from the valve body f, and turn the protruding small diameter part j ₂ to open the valve body f. On the other hand, when opening and closing the valve body f, when the valve body f is not operated, the operation shaft j is reversed from the above operation, and the large diameter part j ₁ is placed in the upper half of the operation hole k, and _{the small diameter part j 2 is} placed in the same lower part. The valve height is reduced while securing the opening/closing stroke of the valve body f by fitting each half part _k2 so that the entire operating shaft j is immersed in the operating hole k. Proposed. In addition, in the figure, g represents the valve body f and the valve body a.
j is the valve core fitted into the charging port e, i is the stopper that prevents the valve body from being removed, l is the cap that seals the operation port c,
m is a blind cap that closes the charging port e.

(Problem to be solved by the invention) However, with this conventional device, when switching from operating to non-operating the valve body f, it is necessary to reverse the operating shaft j, and it is difficult to switch the operating shaft j. There is a problem that the operation cannot be performed smoothly.

This idea was made in view of the above points,
The purpose of this is to improve the shape of the operation hole provided in the valve body and the operation shaft fitted into the operation hole in the closure valve of the invention, so that the valve body can be changed from operating to non-operating. When switching to
The purpose is to enable smooth switching of the operating axis.

(Means for solving the problem) In order to achieve the above object, the solution of the present invention is such that the inside piping port and the operation port are opened vertically facing each other, and the outside piping a valve body that is opened horizontally opposite to each other such that a port and a charge port are orthogonal to the inside piping port and the operation port; and a valve body that is fitted and screwed into the valve body from the operation port; A valve body having an operation hole that can be opened and closed via an operation shaft, and a valve body that opens and closes the in-machine piping port, a valve core fitted in the charge port, and a valve core that is screwed into the operation port of the valve body, In the shutoff valve for a room cooler, which includes a packing box fitted with a sealing member on the inner periphery for airtight sealing between the valve body and the valve body, the operation hole of the valve body is rotated by a predetermined amount in two equal rectangular shapes. The upper half has an octagonal cross section shifted by an angle, and the lower half has a quadrangular cross section in which only one rectangular part of the upper half cross section is continuously extended downward; The operating shaft has a rectangular cross section that fits into the operating hole, and during operation, the upper half of the operating hole fits into the other (not continuous to the lower half) square portion and projects above the valve body. When the operating shaft is stored, it has a configuration that allows it to be inserted into the valve body by fitting up to the lower half of the operating hole.

(Function) With the above configuration, in the present invention, when operating the valve body, of the two rectangular sections in the upper half of the operation hole, the operation axis is directed to the rectangular portion on the side that is not continuous with the lower half. The valve body is opened and closed by fitting the valve body so that its upper end protrudes above the valve body, and turning the protruding portion. When storing this operating shaft in the valve body, pull out the operating shaft from the operating hole, turn it by a predetermined angle so that it corresponds to the lower half of the operating hole, and then insert the operating shaft so that it reaches the lower half of the operating hole. The operating shaft is housed within the valve body by fitting into the valve body. This eliminates the need for reversing the operating shaft when switching between operating and storing the operating shaft.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

2 and 3 show a shutoff valve A for a room cooler according to an embodiment of the present invention, 1 is a valve body, an operating port 2 is provided in the upper part of the valve body 1, and an outdoor shutoff valve A is provided in the lower part of the valve body 1. Inside-machine piping ports 3 for connecting the piping _B1 inside the machine are opened facing each other in the vertical direction. On the other hand, on one side of the valve body 1, there is an outside pipe port 4 for connecting the pipe _B2 on the outside of the outdoor unit (on the indoor unit side), and on the other side, a charge port 5 for air purge, gas charge, etc. are opened to face each other in the horizontal direction so as to be perpendicular to the line connecting the inside pipe port 3 and the operation port 2.

A valve element 6 for opening and closing the in-machine piping port 3 is fitted and screwed into the inside of the valve body 1 from the operating port 2, and a valve element 6 is inserted into the upper surface of the valve element 6 from the operating port 2 via the operating shaft 7. Operation hole 8 that can be opened and closed (screw operation)
is drilled. The operation hole 8 has an octagonal (star-shaped) cross section, which is made by shifting two equal rectangles (squares) by a predetermined angle (45°), as shown in FIG.
It is composed of an upper half part 8a and a lower half part 8b having a rectangular cross-section, as shown in FIG. 5, in which only one rectangular part of the cross section of the upper half part 8a is continuously extended downward. On the other hand, the operating shaft 7 is formed to have a square cross section that engages with the operating hole 8. Therefore, when operating the valve body 6, the operating shaft 7 is engaged with the other rectangular part (the part not continuous with the lower half 8b) of the upper half 8a of the operating hole 8, as shown in FIG. Rotate the valve body 6 with a wrench etc. so that it can protrude upwards, and when it is stored (when not in operation)
As shown in FIG. 3, the lower half portion 8b of the operation hole 8 is fitted so that substantially the entire portion can be inserted into the valve body 6.

A valve core 9 that constantly closes the charge port 5 is fitted into the charge port 5.
A cylindrical box 10 is fitted to the operation port 2 of the valve body 1 with the valve body 6 fitted inside and screwed in an airtight manner. The box 10 is fitted with a seal member 11 made of an O-ring, a retaining ring 12 and a stopper 13 on its inner periphery.
The sealing member 11 is fitted in the box 10 and is prevented from coming off, and the sealing member 11 provides an airtight seal between the box 10 and the valve body 6. Reference numeral 14 denotes a flare nut that is screwed onto the outside of the charging port 5 and seals the charging port 5 via a blind lid 15, and reference numeral 16 denotes a cap that is screwed onto the top of the box 10 and seals the top open port of the box 10.

Therefore, in the embodiment, the closing valve A
When the valve is closed, as shown in FIG.
It is in a state where it is fitted into a. When switching the closing valve A from the closed state to the open state, first remove the cap 16 from the packaging box 10 to expose the upper end of the operating shaft 7, and then open the exposed operating shaft 7 with a spanner or the like. When the valve is rotated in the valve-opening direction, the valve body 6 that engages with the operating shaft 7 spirals upward, and as the valve body 6 rises, the inboard piping port 3 opens and the outboard piping port 4 and charge It communicates with the port 5, so that the closing valve A shifts to the open state. Then, the valve body 6
After moving the operating shaft 7 to the rising end position,
is removed from the operation hole 8 of the valve body 6, and the lower half 8 of the operation hole 8 is rotated by a predetermined angle (45 degrees) in either the left or right direction.
By inserting and engaging the cap 16 into the valve body 6, the removed cap 16 is screwed into the packing box 10, and the closing valve A is brought into the open state as shown in FIG. can be retained.

In that case, the procedure for switching the operating shaft 7 from operating to storing is as described above, by pulling out the operating shaft 7 from the operating hole 8 of the valve body 6 and rotating it through a predetermined rotation angle (45 degrees) in either the left or right direction. Since it only needs to be inserted into the operation hole 8 after rotation, there is no need to hide it from the conventional one shown in FIG. 1 and to reverse the upper and lower ends of the operation shaft 7. Switching operations can be performed smoothly and easily.

Further, the shutoff valve A is assembled by fitting and screwing the valve body 6 into the valve body 1 and then securing the valve body 6 inside the valve body 1 with the packing box 10. The valve body 6 can be of a so-called tapered shape with a lower part having a larger diameter than an upper part, thereby making it possible to ensure a large valve diameter of the closing valve A and reducing its pressure loss. If the same valve diameter is required, the valve body 1 can be made smaller.

(Effects of the invention) As described above, according to the shutoff valve for a room cooler of the present invention, the valve body fitted and screwed into the valve body is prevented from coming out by the packing box, and a sealing member is attached to the inner periphery of the packing box. is fitted to airtightly seal the packing box and the valve body, and the valve body is provided with an operation hole that engages with an operation shaft having a square cross section for rotating the valve body. By providing the upper half of the operating hole with an octagonal cross-section in which an equal square is shifted by a predetermined angle so that the operating shaft cannot be inserted into the lower half by replacing the operating shaft, the operating shaft is different from the conventional one. There is no need to form a large diameter part and a small diameter part in two stages, the structure is simple, the structure is simple, there is no need to form a large diameter part and a small diameter part in two stages, and the structure is simple. And it can be done easily.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of the conventional example, Figures 2 to 5
The figure shows an embodiment of the present invention, and FIGS. 2 and 3 are longitudinal cross-sectional views of the valve closed state and the valve open state, respectively.
4 and 5 are sectional views taken along the - line and - line in FIG. 3, respectively. A... Closing valve, 1... Valve body, 2... Operation port,
3...Piping port inside the machine, 4...Piping port outside the machine, 5...
...Charge port, 6...Valve body, 7...Operation shaft, 8...
...Operation hole, 8a...upper half, 8b...lower half, 9
... Valve core, 10 ... Packing box, 11 ... Seal member.

Claims (1)

[Scope of utility model registration request] A piping port 3 inside the machine and an operation port 2 are opened vertically facing each other, and a piping port 4 outside the machine
and a valve body 1 which is opened horizontally and oppositely so that the charge port 5 is orthogonal to the in-machine piping port 3 and the operation port 2, and is screwed into the valve body 1 from the operation port 2. a valve body 6 which has an operation hole 8 that can be opened and closed from the operation port 2 via an operation shaft 7 and which opens and closes the in-machine piping port 3; and a valve core 9 fitted into the charge port 5. , a closing valve for a room cooler comprising a packing box 10 which is screwed into the operating port 2 of the valve body 1 and has a sealing member 11 fitted on the inner periphery for airtight sealing between the valve body 6 and the valve body 1; The operation hole 8 of the valve body 6 has an octagonal upper half 8a whose cross section is made by shifting two equal squares by a predetermined rotation angle, and a cross section which is continuous with only one square portion of the cross section of the upper half 8a. and a quadrangular lower half 8b extending downwardly.
is formed into a square cross-section that fits into the operation hole 8, and can protrude above the valve body 6 by fitting the upper half 8a of the operation hole 8 into the other rectangular portion during operation, and when stored, the operation hole 8. A closing valve for a room cooler, characterized in that it can be inserted into the valve body 6 by fitting up to the lower half 8b.