JPH031050Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is applicable to air filters, air regulators,
It relates to the pressure of a lubricator, pump, etc.

(Prior art) An air filter, which is a type of conventional pressure vessel, is
As shown in Figure 7, air inlet 1 and air outlet 2
A pressure vessel main body 4 is removably attached to a support body 3 having a clamping device 5, and the pressure air entering the pressure vessel main body 4 from the air inlet 1 is supported by a deflector 6 and crosses the air outlet 2. The air is filtered by a filter 7 and then exits from the air outlet 2. Further, the water adhering to the filter 7 accumulates in the pressure vessel body 4, and when the liquid exceeds a certain level, it is drained to the outside by an automatic drain valve 8. The clamping device 5 connects a threaded portion 10 on the inner circumference of a ring-shaped clamp member 9 that airtightly supports the pressure vessel main body 4 at the bottom thereof to a threaded portion 11 provided on the outer circumference of an overhanging ring portion 3a at the bottom of the support body 3. It was structured to be clamped by screwing. The pressure vessel main body 4 includes an inner flange 9a of a clamp member 9 and a retainer 1 that is fitted and supported on the inner surface of the clamp member 9.
The outer flange 4a of the pressure vessel main body 4 is held between the clamp member 9 and the outer flange 4a, and the O-ring 13 supported on the inner surface of the clamp member 9 is pressed against the outer flange 4a and is airtightly attached and supported.

(Problem to be Solved by the Invention) In such a pressure vessel, for example, when the filter 7 is clogged and you are trying to replace it, the clamp member 9 is removed without realizing that pressure is being applied inside the pressure vessel body 4. If you try to remove the pressure vessel body 4 by turning it, water will blow out just before it comes off, and the pressure vessel body 4 may be blown away, which is dangerous.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pressure vessel that can prevent the pressure vessel body from coming off even if an attempt is made to remove it when pressure is applied inside the pressure vessel body.

(Means for solving the problem) The structure of the present invention to achieve the above purpose is as follows:
Referring to FIGS. 1 to 6, which correspond to embodiments, the present invention will be described in detail. In a pressure vessel which is detachably attached by turning, (a) a pin sliding hole 16 is radially penetrated through the projecting ring portion 3a of the support body 3 in correspondence with the clamp member 9; (b) a lock recess 17 is provided in the clamp member 9 to accommodate the pin sliding hole 16; (c) a locking pin is provided in the pin sliding hole 16; 19 is slidably housed; (d) the lock pin 19 is provided with a pressure receiving seal portion 22; (e) the lock pin 19 is configured so that when the pressure inside the pressure vessel body 4 is low, The lock pin 19 is biased by a spring 25 which biases the lock pin 19 so that it does not protrude into the lock recess 17 and controls the lock pin 19 to protrude into the lock recess 17 by resisting the pressure when the pressure is high. It is characterized by the following.

(Function) In such a pressure vessel, when pressure is applied inside the pressure vessel main body 4, the pressure acts on the pressure receiving seal portion 22 of the lock pin 19, and the spring 25 is compressed by the pressure, and the tip of the lock pin 19 is compressed. is projected into the lock recess 17 of the clamp member 9 and is in a locked state. Therefore, in this state, even if an attempt is made to rotate the clamp member 9 to remove the pressure vessel main body 4, the clamp member 9 will not rotate and cannot be removed. Next, when the pressure inside the pressure vessel body 4 is low (pressure is 0 or low enough to pose no danger), the lock pin 19 is pushed inward by the force of the spring 25, and its tip is in a state in which it does not protrude outward from the outer periphery of the overhanging ring portion 3a. Therefore, in this state, the clamp member 9 rotates and the pressure vessel main body 4 can be removed from the support body 3.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. 1 and 2 show a first embodiment of the present invention. Note that portions corresponding to those in FIG. 7 described above are designated by the same reference numerals. In this embodiment, the opening of the pressure vessel main body 4 is fitted into the outer periphery of the overhanging ring portion 3a of the support 3, and the O-ring 13 accommodated in the recess 14 on the outer periphery of the overhanging ring portion 3a is inserted into the pressure vessel main body. The pressure vessel body 4 is pressed against the inner periphery of the pressure vessel body 4 to form a seal between the pressure vessel body 4 and the extension ring portion 3a. The outer flange 4a of the pressure vessel body 4 is fitted into and locked in a recess 15 on the inner periphery of the clamp member 9. A pin sliding hole 16 is provided in the extending ring portion 3a so as to correspond to the clamp member 9 and penetrate in the radial direction. The clamp member 9 is provided with lock recesses 17 intermittently in the circumferential direction so as to correspond to the pin sliding holes 16 when the clamp member 9 is tightened. A through hole 18 is provided in the clamp member 9 at each lock recess 17 . A lock pin 19 is slidably housed in the pin sliding hole 16. A pair of flanges 20 are protruded from the base end of the lock pin 19, and an O-ring 21 is fitted to the outer periphery of the pin between the flanges 20 to form a pressure receiving seal portion 22, which reduces the pressure inside the pressure vessel body 4. The lock pin 19
It can be moved while sealing the inner surface of the pin sliding hole 16 with an O-ring 21. Stop members 23 and 24 are fitted and supported at both ends of the pin sliding hole 16 to limit the movement range of the lock pin 19. Stop member 23 and collar 20
A spring 25 is fitted on the outer periphery of the lock pin 19 with both ends supported by the spring 25, and when the inside of the pressure vessel main body 4 is under low pressure, the spring 25 is biased to lock the lock pin 1.
The tip of the ring 9 is prevented from protruding outward from the outer periphery of the overhanging ring portion 3a. The panel 25 is determined to have a strength that is compressed by the pressure when the inside of the pressure vessel main body 4 is in a high pressure state.

In such a pressure vessel, when the pressure inside the pressure vessel main body 4 is high, the pressure acts outward on the pressure receiving seal portion 22 of the lock pin 19, compressing the panel 25 and causing the tip of the lock pin 19 to protrude into the ring. It projects outward from the outer periphery of the portion 3a and fits into the lock recess 17 to be in a locked state.
Therefore, in this state, even if an attempt is made to remove the pressure vessel main body 4 by rotating the clamp member 9, the clamp member 9 will not turn because it is locked, and the pressure vessel main body 4 cannot be removed. When the pressure inside the pressure vessel body 4 is low, the force of the panel 25 overcomes the locking pin 19.
is biased inward, and the tip of the lock pin 19 is housed within the extended ring portion 3a, so the clamp member 9 can be turned and the pressure vessel body 4 can be removed.

Whether the clamp member 9 is in the locked state can be determined by inserting a rod into the through hole 18 and checking its insertion length, or by applying fluorescent paint to the tip of the locking pin 19. This can be determined by looking through the through hole 18 at its position.

FIG. 3 shows a second embodiment of the present invention. This embodiment differs from the first embodiment in that a clamp member 9 is integrally attached to the outer periphery of the opening of the pressure vessel body 4.

A third embodiment of the present invention shown in FIGS. 4 to 6 shows an example in which the present invention is applied to a pressure vessel in which the support body 3 and the clamp member 9 can be attached and detached in a one-touch manner. In this example, the support 3
Insertion recesses 27 are provided intermittently in the circumferential direction on the outward clamp protrusions 26 provided along the circumferential direction on the outer periphery of the overhanging ring portion 3, and correspondingly, inward clamp protrusions are provided on the clamp member 9. The clamp member 9 and the support body 3 are inserted relative to each other when the insertion recess 27 and the inward clamp protrusion 28 match, and in this state, by turning both by a slight angle, The outward clamp protrusion 26 and the inward clamp protrusion 28 overlap vertically to form a clamped state. In this state, the lock pawl 29 of the clamp member 9 is engaged in the insertion recess 27 with the force of the spring 30, thereby preventing the clamp member 9 from rotating. Other points are 1st and 2nd
The structure is similar to that of the embodiment.

Note that the present invention is applicable not only to air filters but also to pressure vessels such as air regulators, lubricators, and air pumps.

(Effect of the invention) As explained above, the pressure vessel according to the invention has a structure in which the lock is applied using the pressure inside the pressure vessel body, so the clamp member cannot be rotated under pressure. First, it is possible to prevent the pressure vessel body from being removed, thereby preventing danger. Furthermore, the lock is automatically released when no pressure is applied, so there is an advantage that the lock does not have to be troublesome to handle.

[Brief explanation of the drawing]

1 and 2 are a vertical cross-sectional view and a cross-sectional view of a main part of a first embodiment of a pressure vessel according to the present invention, and a third
The figure is a longitudinal cross-sectional view of a main part of a second embodiment of the pressure vessel according to the present invention, FIG. 4 is a longitudinal cross-sectional view of a main part of a third embodiment of a pressure vessel according to the present invention, and FIGS. 5 and 6 are FIG. 7 is a longitudinal cross-sectional view of a main part and a cross-sectional view of a main part of a clamp member, and FIG. 7 is a longitudinal cross-sectional view of a conventional pressure vessel. 3... Support body, 3a... Overhanging ring part, 4
... Pressure vessel main body, 4a ... Outer flange, 5 ... Clamp device, 9 ... Clamp member, 10, 11 ...
Threaded portion, 16...Pin sliding hole, 17...Lock recess, 18...Through hole, 19...Lock pin, 20
...Brim, 21...O-ring, 22...Pressure receiving seal portion, 23, 24...Stop member, 25...Spring.

Claims (1)

[Scope of utility model registration request] In a pressure vessel that is removably attached by pivoting a clamp member provided along an opening of a pressure vessel body relative to an overhanging ring portion of a support body, the overhanging ring portion of the support body includes: A pin sliding hole is provided extending through the clamp member in the radial direction, a lock recess is provided in the clamp member to correspond to the pin sliding hole, and a lock recess is provided in the pin sliding hole. A lock pin is slidably housed, the lock pin is provided with a pressure receiving seal portion, and the lock pin is biased so that the lock pin does not protrude into the lock recess when the pressure inside the pressure vessel main body is low; A pressure vessel characterized in that the pressure vessel is biased by a spring that controls the lock pin to protrude into the lock recess under pressure when the pressure is high.