JPS64587Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of a sealing plug used for pressure testing of piping for coolers, etc.

Pressure testing of metal pipes, etc., which are generally used for piping for coolers, etc., involves connecting a blind plug to one opening of the pipe and then feeding compressed air, etc. from the other opening to detect gas leaks in advance. It is. By the way, when connecting a blind plug etc. to a pipe,
Conventionally, these are connected with screws, but the connection between the blind plug and the pipe is usually equipped with O2 to prevent air leakage.
Since a sealing member such as a ring is provided, the sealing member is easily damaged when the blind stopper is screwed into the pipe, which significantly shortens the life of the sealing member. In addition, pressure tests are inefficient because it takes time and effort to tighten the blind plug with a spanner when connecting and separating the blind plug and the pipe.

This idea was made with the aim of providing a sealing plug for pressure testing of piping, etc., which can be easily attached and detached without damaging the sealing member. A sleeve having a tip projection and an inner groove is fitted onto the outer periphery of the main body, and the locking ball is locked and released by sliding the sleeve left and right on the main body by operating a lever. The summary is what we have done.

This invention will be described below based on embodiments shown in the accompanying drawings.

A first embodiment of this invention is shown in FIGS. 1-3.
The sealing plug of this first embodiment is used to close a pipe whose open end has a flange-like stopper Ps as shown in FIG. 1, for example. This sealing plug includes a main body 1, a socket adapter 2 screwed from the left side of the main body 1, a sliding ring 4 on the inner periphery of the main body 1 and the socket adapter 2 and elastically biased by a spring 3; A sleeve 6 is slidably fitted around the outer periphery of the main body 1 and the socket adapter 2 and is elastically biased by a spring 5, and is rotatable around a bolt 7 that is pivotally supported by the socket adapter 2. It consists of an attached lever 8.

A locking ball 9 is loosely fitted into the hole 1a formed in the main body 1, and when the lever 8 is in the position shown in FIGS. It is pushed and fixedly clamped in the hole 1a. In FIG. 1, an eccentric cam 8c fixed to the base of the lever 8 is fitted into a hole 8b formed in a slide plate 8a provided to be slidable in the left-right direction, and the slide plate 8a slides with the sleeve 6. As you do,
They are connected by a pin 8d. Reference numeral 7 denotes a bolt that is the center of rotation of the lever 8, and as will be described later, when the lever 8 is rotated about the bolt 7, the sleeve 6 slides to the left or to the right in FIG.

Next, the attachment and detachment of the sealing plug of this embodiment will be explained.

Although FIG. 1 shows the sealing plug and the pipe P in a separated state, the two are connected as follows. That is, before inserting the pipe P, first raise the protruding part 8e of the lever 8 to the front in the figure and rotate the lever 8 around the bolt 7. Since the eccentric cam 8c rotates together with the lever 8, the slide The eccentric cam 8c fitted on the plate 8a presses the slide plate 8a to the right in FIG. When the lever 8 is moved to the position shown in FIG. 2, the outer circumferential groove 6c reaches above the locking ball 9. In this state, insert the pipe P from the open end 1d until the O-ring 10 and stopper Ps contact the locking ball 9. At this time, the locking ball 9 is in a state where it can move freely in the direction of the outer circumferential groove 6c, so even if the pipe P is further advanced, the O-ring 10 and the stopper Ps are not locked by the locking ball 9 and the sealing plug is closed. It can be easily inserted inside. Furthermore, O-ring 1
When the pipe P is further inserted while resisting the elastic force of the spring 3 while the pipe P is in contact with the end surface 4b of the sliding ring 4, the stopper Ps rides over the locking ball 9 (FIG. 2). In this state, when the lever 8 is raised toward the front around the bolt 7, the slide plate 8a moves to the left, so that the sleeve 6 slides to the left on the outer periphery of the main body 1. At this time, the tip 6 of the sleeve 6
a comes into contact with the locking ball 9 from above again, and the locking ball 9 is pushed into the hole 1a again (Fig. 3), so that the locking ball 9 contacts the hole 1a and the outer circumferential groove Pb of the pipe P. The connection between the two is completed. In this state, the sliding ring 4 has moved a considerable distance against the elastic force of the spring 3, so the sealing plug and the pipe P receive forces in opposite directions, but the locking ball 9 has already Since the outer circumferential groove Pb of the pipe P is locked by the pipe P, even if the force applied to the pipe P is released, the connection between the pipe and the sealing stopper is maintained.

When separating the sealing plug and pipe from the connected state shown in FIG. 3, first rotate the sleeve 6 to the position shown in FIG. 2. Then, as described above, the locking ball 9 becomes movable in the direction of the outer circumferential groove 6c,
This releases the locking of the stopper Ps of the pipe P by the locking ball 9, so that the sealing plug and the pipe P can be smoothly separated by moving the pipe P or the sealing plug an appropriate distance to the right. can.

In the above embodiments, the bolt 7 is pivotally supported by the socket adapter 2, but as in the second embodiment shown in FIGS. 4-6, the bolt 17 is pivotally supported by the main body 11, It is also possible to have a structure in which the socket adapter is connected by screws from the left side. Note that the operation of the second embodiment is similar to that of the first embodiment.

As described above, this sealing plug connects and disconnects pipes by rotating the lever 8 to lock and release the locking ball, so the pipes can be connected and separated without damaging the sealing member as in the conventional case. In addition, pipes can be easily connected and separated, and the efficiency of pressure tests can be improved.

[Brief explanation of drawings]

1 to 3 are explanatory diagrams showing a first embodiment of this invention, and FIGS. 4 to 6 are explanatory diagrams similarly showing a second embodiment. 1, 11... Main body, 2, 12... Socket adapter, 3, 5, 13, 15... Spring, 4,
14...Sliding ring, 6,16...Sleeve,
7,17...Bolt, 8,18...Lever, 9,
19... Locking ball, 1a, 8b, 11a, 18
b...hole, 1c, 11c, 4a, 14a, 10,
20...O ring, 6c, 16c...Outer groove, 8
a, 18a...Slide plate, 8c, 18c...Eccentric cam, 8d, 18d...Pin.

Claims (1)

[Scope of utility model registration request] This is a sealing plug for closing the open end of a pipe P having a flange-like stopper Ps at the open end, and the outer peripheral tip of the main body 1, 11 has surfaces 6a, 16a in contact with the main body surface and locking balls 9, 19 described below. Sleeves 6 and 16 having grooves 6c and 16c that allow protrusion of the outer circumferential surface of the pipe P are fitted so as to be slidable in the axial direction, and the inner circumference is biased in the direction of the openings 1d and 11d, and A tapered hole 1 is fitted with a sliding ring 4, 14 that captures one surface of the stopper Ps, and converges in the axial direction at a predetermined position at the front end of the main body 1, 11.
a, 11a and taper holes 1a, 1
Locking balls 9 and 19 that catch the other surface of the stopper Ps of the pipe P are loosely fitted into 1a so as to be able to protrude and retract from the inner and outer circumferential surfaces of the main bodies 1 and 11.
Lever 8, 18 is pivotally mounted on the side surface of body 1, and slide plate 8a, which slides in the axial direction on main body 1, 11 as the lever 8, 18 rotates, and sleeve 6 are connected with pin 8d. A sealing stopper characterized by being connected.