JPS5927590Y2 - Refrigeration equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a refrigeration system in which heat medium distribution piping is connected between separate devices such as separate air conditioners, and more specifically, the invention relates to a refrigeration system in which piping for heat medium distribution is connected between separate devices such as separate air conditioners. Regarding the fixing structure of the connection part.

Conventional refrigeration equipment often used flanged pipe joints made with forged molds for connecting pipe connections, but due to high production costs, single union pipe joints machined from bar stock are now used. It has been replaced by forging molds because it is suitable for mass production and the product cost is low.

However, when this one-piece union joint is used, there is a problem with the means for fixing it to the frame plate of the refrigeration system.

In other words, in order to fix the end of a pipe using a pipe joint made from a bar material, it is necessary to use a holding plate in place of the flange part of the pipe joint, and the present applicant previously proposed (
Utility Application No. 1984-42353, Utility Publication No. 55-45973)
According to this plan, as shown in Figure 1, a shallow ring groove 5' is provided around the pipe joint body 4a, and a hole 2' having the same shape as the cross section of the pipe joint 4 is provided in the holding plate 1'. Then, fit the presser plate 1' into the end of the pipe joint 4, rotate it by θ degrees, for example, 300 degrees in the groove as shown in FIG. 2, and screw the presser plate 1' to the frame plate 7. This fixes the joint in the X-X axis direction, that is, in the longitudinal direction of the joint.

However, with such fixing means, θ is
It is difficult to maintain the tilted state without changing the angle, which impairs workability in the device body where the surrounding space is narrow. Moreover, there is a problem in that the presser plate 1' becomes eccentric with respect to the groove 5' and easily falls off due to vibrations and the like, further impairing workability.

Furthermore, since the hooking part between the holding plate 1' and the pipe fitting 4 is only at the apex part of the hexagon, the overlapping area is extremely small, so it does not easily come off from the groove, and the fixing strength against movement in the axial direction of the fitting is small. There are also drawbacks.

Furthermore, when using a pipe joint of this type in which the body shape of the joint is not square but circular, there is a drawback that it cannot be fixed by means of bending.

The present invention focuses on the above-mentioned conventional deficiencies, and attempts to eliminate them by providing an improved device that makes it possible to secure the mounting strength of the connecting pipe connection part for refrigeration equipment and improve workability. In particular, by using a holding plate that is open on one side and has a notch that can fit into and hold a groove formed on the circumferential surface of the pipe joint in a direction perpendicular to the pipe axis, By securing the pipe joint with the pipe joint, the pipe joint cannot be moved in the longitudinal direction.Furthermore, while the communication hole provided in the frame plate of the refrigeration equipment body is shaped into a square hole, the pipe fitting is fitted into the communication hole. The present invention is characterized by a configuration in which the outer peripheral shape of the pipe joint to be inserted is formed in the same shape so that rotation of the pipe joint can be restricted.

The structure of the present invention will be explained below with reference to the attached drawings.

FIG. 3 shows the pipe joint part of the device of the present invention, 1
is a holding plate made of a metal plate and molded into a box shape, and has a notch 2 in the center that opens on one side, and screw holes 3 and 3 are drilled in the mounting seats at both ends, respectively. Then, the screw holes 3, 3 and the frame plate T are connected to the main body frame plate 7 of the refrigeration equipment.
It is fixed to the inside of the main body with screws using screw holes 9, 9 drilled in the main body.

The notch 2 is formed into a shape that can be inserted into and held in a groove 5 to be described later, and the part 2a that opens on one side is a narrow opening with a slightly smaller diameter than the hole diameter on the back side. , and when the presser plate 1 is fixed to the frame plate 7, the center of the notch 2 and the center of the communication hole 8 provided in the frame plate 7 are positioned so as to coincide with each other.

4 is a pipe joint machined from a rod made of metal such as brass, and has a rond shape with no protruding parts such as a flange on the circumferential surface, and has a front end in the direction of the central axis. A flow hole for passing a heat exchange medium such as refrigerant or water is passed through, and at one end there is a pipe 6 for the flow of the heat exchange medium inside the device body.
A threaded portion 4b is provided at the other end to which a pipe joint (not shown) of an external pipe for circulating a heat exchange medium outside the main body of the apparatus is screwed.

After this pipe joint 4 is connected to the tip of the heat exchange medium distribution pipe 6 in the apparatus main body, the intermediate portion 1 is inserted into the communication hole 8 of the frame plate 7, and the threaded portion is projected outward from the frame plate 7. By fixing it in place, it can be used as a connection member with external piping.

Therefore, the pipe joint 4 is attached to the circumferential surface of the body inside the main body of the device.
A groove 5 extending on the outer circumference and perpendicular to the tube axis is provided, and this groove 5 is formed into a cut groove of an appropriate shape so as to fit into the cut portion 2 of the holding plate 1. With the groove 5 and the notch 2 engaged, the pipe fitting 4
It is possible to restrict the movement of the pipe joint 4 in the direction of the pipe axis by inserting the front part of the pipe into the communication hole 8 and fixing the presser plate 1 to the frame plate 7 in the manner described above. This is unprecedented.

Note that by processing the width of the opening 2a of the notch 2 to be approximately 0.2 to 11 Trrn smaller than the effective width of the groove 5, the notch 2 can be inserted into the groove 5. It is possible to form a retaining form such that it cannot be easily removed after it has been removed.

Furthermore, the illustrated example has a structure in which the pipe joint 4 has a body of a square rod, for example, a hexagonal rod, and by forming the communicating hole 8 bored in the frame plate 7 into a hexagonal hole corresponding to the cross-sectional shape, the frame plate 7 The pipe joint 4 fitted into the pipe joint 4 cannot be rotated by external force.

In this example, it is sufficient that the holding plate 1 has the function of preventing the pipe fitting 4 from moving in the axial direction, so the groove 5 only needs to be perfectly formed, and the notch 2 of the holding plate 1 also fits perfectly. It is fine as long as it is a round hole.

Therefore, in the example shown in FIG. 3, the anti-rotation function is provided between the body of the pipe joint 4 and the communicating hole 8 of the frame plate 7, and the prevention of axial movement is provided between the holding plate 1 and the retaining part of the pipe joint 4. This is a form in which each person has their share of responsibility.

Note that the shape of the outer periphery of the pipe joint 4 that engages with the communication hole 8 and the throttle hole 8 is not limited to a hexagonal shape, and may be any other square shape in order to achieve the purpose of restricting rotation.

The present invention has the above-mentioned configuration, and once the holding plate 1 and the pipe joint 4 are engaged, the notch 2 and the groove 5 are in a resiliently engaged state. There is no inconvenience such as the pipe fitting 4 separating from the groove 5 during transportation or when it is fixed to the frame plate 7, and the workability of transportation and installation is significantly improved.

Further, in the present invention, the communication hole 8 is formed into a square hole, and the outer periphery of the pipe fitting 4 to be inserted into the throttle hole 8 is formed to have the same shape as the communication hole 8, so that the pipe fitting 4 is fitted into the communication hole 8. Since the pipe fitting 4 is provided so as to be able to restrict its rotation, once it is fixed to the frame plate 7 using the presser plate 1, the pipe fitting does not undergo any heat movement in the circumferential direction, thereby preventing the above-mentioned movement in the axial direction. Due to the fixing effect combined with the function, a spanner is used when connecting external piping to the pipe fitting 4.
This makes it possible to easily and reliably connect the pipes with the pipes, and it is possible to easily connect the pipes without causing accidents such as refrigerant leakage.

Furthermore, since a fixing method using grooves 5 is adopted, by making the groove depth sufficiently and increasing the thickness of the holding plate 1, the fixing strength is enormous, and it has excellent durability against strong external forces. The invention is a highly versatile refrigeration device that has various practical effects.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a pipe joint in a conventional refrigeration system, FIG. 2 is a right side view of FIG. 1, and FIG. 3 is an exploded perspective view of a pipe joint in an example of the refrigeration system of the present invention. . DESCRIPTION OF SYMBOLS 1... Holding plate, 2... Notch part, 4... Pipe joint, 5... Groove, 6... Piping for heat exchange medium distribution, 7...
・Frame board, 8... communication hole.

Claims (1)

[Scope of utility model registration request] A pipe joint 4 connected to the tip of a heat exchange medium distribution pipe 6 in the refrigeration apparatus main body is connected to a communication hole 8 provided in the frame plate 7 of the main body.
In a refrigeration system in which the other end of the pipe joint 6 is used as a member for connection with an external pipe by fitting into the refrigeration system, a groove is formed on the circumferential surface of the pipe joint 4 located inside the refrigeration system main body in a direction perpendicular to the pipe axis. The holding plate 1 is formed by making a metal plate as a material and having a notch 2 which is open on one side and can fit into the groove 5, and the notch 2 of the holding plate 1 and the pipe Groove 5 of joint 4
By fixing the presser plate 1 to the inner surface of the frame plate 7 in a state in which the By forming the outer periphery of the pipe fitting 4 to be fitted into the communication hole 8 in the same shape as the communication hole 8, and by fitting the pipe fitting 4 into the communication hole 8, rotation of the pipe fitting 4 is restricted. A refrigeration device characterized by the following features: