JPH0535236Y2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention (industrial application field) This invention is an improvement of a device for locking a lid body and a lid retaining ring without a flange in a pressure vessel equipped with a sealing means using a bladder flange. Regarding.

(Prior Art) Conventionally, a lid body that is fitted into an opening in a pressure vessel to close the opening is formed on the inner periphery of the opening, and an annular groove is formed in the upper part of a screw ring that is screwed into and held down by an internal thread. A lid holder for a pressure vessel in which a split ring with a circular cross section is fitted into the annular groove, and the outer lower part of the split ring is engaged with a slope formed inside the upper end of the opening to press the split ring into contact with the annular groove. A screw locking device is known from Japanese Utility Model Application Publication No. 55-124658,
Also, stack the bushing and O-ring inside the nut, press fit the conical part of the insertion shaft with a male thread to be screwed into the inside of the O-ring, and fit the O-ring between the inner periphery of the hole and the end face of the bushing. A cap for sealing a hole by pressure contact is known from Japanese Utility Model Application Publication No. 89463/1983.

(Problems to be Solved by the Invention) The conventional lid pressing screw ring locking device described above houses a single split ring in the annular groove of the screw ring, and places the portion protruding from the annular groove above the opening in the pressure vessel. Since the flange of the bladder is pressed against the slope provided on the inside of the edge, the amount of pressing is constant, and for bladders made of the same material, the bladder can be mounted with sufficient strength and sealing performance. However, as the material of the bladder changes, the physical properties of the bladder change accordingly, so a fixed amount of pressure may result in insufficient flange attachment strength and sealing performance, but a single link solves this problem. I can't. We are trying to solve this problem by adjusting the thickness of the bladder flange and increasing/decreasing the pressing amount, but in this case, we have to use an expensive bladder mold to change the thickness of the bladder flange. Since it has to be changed, the product cost is high.

In addition, the hole-sealing cap is used by stacking two rings, and inserting the conical part of the insertion shaft into the O-ring placed on the rigid ring below, expanding the O-ring outward and lowering it. Although it is possible to increase the sealing performance of the hole by applying pressure to both the inner circumference of the hole and the end face of the bushing, it is possible to pressurize both the inner circumference of the hole and the end face of the bushing to improve the sealing performance of the hole, but it is also possible to apply pressure to the inner circumference of the hole and the end face of the bushing to improve the sealing performance of the hole. Two split rings are accommodated, and the lower ring is pressed against the slope provided on the outside of the female thread, and the slope applies an inward compression force and a pushing force to prevent the male thread from being screwed in. It is not possible to perform a reliable locking action.

The present invention was made to solve the above-mentioned conventional problems, and the split ring accommodated in the annular groove can perform the locking action of the lid body and the lid holding ring. By changing the wire diameter of the adjusting split ring placed on top of the split ring, the amount of pressure on the bladder flange can be adjusted arbitrarily, and the purpose is to always obtain constant mounting strength and sealing performance regardless of the bladder material. It is something that can be achieved.

B. Structure of the invention (means for solving the problem) The means of the invention for achieving the above-mentioned object is to screw the external thread on the peripheral surface or the external thread of the lid retaining screw into the internal thread of the opening in the pressure vessel. In addition, an annular groove is formed on the upper outer periphery of the lid body or the lid holding ring that holds the flange of the bladder supported by the receiving step of the opening and closes the opening. accommodates a rigid locking split ring whose circular cross section partially protrudes outside the groove, and a rigid adjustment split ring that overlaps the split ring, and protrudes from the annular groove of the locking split ring. The structure of a locking device for a lid of a pressure vessel or the like is such that a portion of the locking device is brought into contact with a slope provided on the outside of the female thread at the upper edge of the opening of the pressure vessel.

(Function) The locking device configured as described above is shown in drawing No. 1.
In the case of the lid screw-on type shown in the figure, insert the bladder into the pressure vessel through the opening, place the bladder with its flange supported by the receiving part, insert the locking split ring into the annular groove provided in the lid, After stacking and storing the adjustment split ring to obtain the pressing amount that matches the bladder material,
When the male thread of the lid body is screwed into the female thread provided on the inner periphery of the opening, the lid body descends within the opening and the flange of the bladder described above is inserted between the holding step at the lower end and the receiving step. , and gradually increase the amount of pressure on the flange. When a suitable amount of pressure is applied, the outer lower surface of the locking split ring, which partially protrudes from the annular groove, will touch the upper edge of the opening in the pressure vessel. The screw comes into contact with the slope provided on the outside of the screw, and the slope applies an inward compressing force and a pushing force, which prevents the lid from being screwed in and provides a reliable locking action, as well as tightening the bladder flange. The bladder is attached to the pressure vessel with sufficient strength and sealing properties by pressing with an appropriate amount of pressure.

In addition, in the case of the lid retainer ring screw type shown in Fig. 3,
After inserting the bladder into the pressure vessel through the opening and having its flange supported by the receiving step, a lid body is fitted into the opening, and the flange of the bladder is inserted between the presser step and the receiving step. The locking split ring and the adjusting split ring that can obtain a pressing amount that is suitable for the material of the bladder are stacked and accommodated in the annular groove provided in the lid holding ring, and then the lid holding ring is placed. When the male thread is screwed into the female thread provided on the inner periphery of the opening, the lid holding ring descends inside the opening and presses the lid, and the lid presser ring is inserted between the holding step of the lid and the receiving step. The flange of the bladder is clamped, and the amount of holding the flange is gradually increased. When a suitable amount of holding is applied, the outer lower surface of the locking split ring, which partially protrudes from the annular groove, becomes attached to the pressure vessel. It comes into contact with the slope provided on the outside of the screw on the upper edge of the opening,
The slope applies an inward compression force and a pushing force, which prevents the lid retainer ring from screwing in and provides a reliable locking action.The bladder flange is also pressed down with an appropriate amount of pressure, strengthening the bladder. It must be installed in a pressure vessel with sufficient sealing performance.

(Example) An example of the apparatus according to the present invention will be described below based on the drawings.

Figures 1 and 2 show an embodiment of the lid screw type. In the figure, 1 is a pressure vessel such as an accumulator, which is made of steel or the like into a shape with high pressure resistance, and has a An opening 2 is provided.

Reference numeral 3 denotes a stepped portion provided on the inner end side of the opening 2, using a ring body that fits into the opening 2 and is supported by the stepped portion 4 on the back side, and is made of a flexible and elastic material such as rubber. An annular groove 7 provided on the outer periphery of a flange 6 of a bladder 5 formed of a superior material is engaged to support the flange 6 which also serves as a sealing member.

Reference numeral 8 denotes a lid body that fits into the opening 2 described above, and has a hook-shaped holding step part 9 on the outside of the lower part thereof, which corresponds to the receiving step part 3 of the pressure vessel 1 and holds the flange 6 therebetween. As shown in FIG.
A male thread 11 is provided to be screwed into the female thread 10, and an annular groove 1 is provided on the upper circumferential surface of the male thread 11, that is, on the upper end side, for accommodating two types of split rings to be produced later.
2, and an air supply valve 13 for sealing pressure fluid into the bladder 5 is installed in the center.

Reference numeral 14 denotes a split ring for locking the lid body 8, which is made of a rigid material such as steel and has a circular cross section and is cut off at one point and inserted into the lower side of the annular groove 12. The protruding portion protrudes from the annular groove 12, and when the lid body 8 is screwed into the opening 2 of the pressure vessel 1, the protruding portion abuts against a slope 15 provided on the outer side of the female thread 10 on the upper edge of the inner periphery of the opening 2. Since the slope applies an inward compressing force and a pushing force, the lid 8 is prevented from being screwed in, and the lid 8 is reliably locked onto the opening 2.

Reference numeral 16 denotes a split ring for adjusting the pressing amount of the flange 6, which is made of a rigid material such as steel and has a circular cross section, and is cut at one point to form the annular groove 1.
2 and attach it to the top of the locking split ring 14.
This increases the height of the ring by stacking it on top of the ring.
The degree of increase changes in proportion to the wire diameter of the adjusting split ring 16, so when changing the material of the bladder, select the adjusting split ring 16 with a wire diameter that provides a height that matches the elasticity. By adjusting the pressing amount of the flange 6 depending on the material, the bladder 5 can always be attached to the pressure vessel 1 with sufficient strength and sealing performance.

Figures 3 and 4 show an example of a screw-on lid holding ring type. In the figures, 17 is a pressure vessel such as an accumulator, which is made of steel or the like into a shape with high pressure resistance, and has an opening at the top. 18 are provided.

Reference numeral 19 denotes a receiving part provided on the inner end side of the opening 18, and a flange 2 which also serves as a sealing member for the bladder 20 made of a flexible and highly elastic material such as rubber.
Support 1.

Reference numeral 22 denotes a lid that fits into the opening 18, and has a hook-shaped holding step 23 on the outer side of the lower part that corresponds to the receiving step 19 of the pressure vessel 17 and holds the flange 21 therebetween. An annular groove 24 is provided around the outer periphery, and a seal ring 25 is installed in this groove 24.
A cylindrical portion 27 into which an air supply valve 26 for sealing pressure fluid into the bladder 20 is inserted into the central portion.
is provided.

Reference numeral 28 denotes a lid holding ring for holding down the above-mentioned lid body 22, and a male thread 29 provided on the circumference is connected to the opening 18.
An annular groove 31 is formed on the outer periphery of the upper portion to accommodate two types of split rings, which will be described later.

32 is a split ring for locking the lid holding ring 28, and when a ring with a circular cross section made of a rigid material such as steel is divided at one place and fitted to the lower side of the annular groove 31, a part of the ring is inserted into the annular groove 31. 31, and when the lid retaining ring 28 is screwed into the opening 18 of the pressure vessel 17, the protruding portion comes into contact with the slope 33 provided outside the female thread 30 on the upper edge of the opening 18, and the slope Since an inward compressing force and a pushing-up force are applied, screwing of the lid retainer ring 28 is prevented, and the retainer ring 28 is reliably locked onto the opening 18 without a flange.

Reference numeral 34 denotes a split ring for adjusting the pressing amount of the flange 21, which is made of a rigid material such as steel and has a circular cross section, and is divided at one point to form the annular groove 3.
1 and attach it to the top of the locking split ring 32.
The height of the bladder 20 is increased by overlapping it with the material, and the degree of increase changes in proportion to the wire diameter of the adjusting split ring 34. Therefore, when changing the material of the bladder 20, the height is adjusted to match its elasticity. By selecting the resulting split ring 34 for adjusting the wire diameter and adjusting the amount of pressure on the flange 21 depending on the material, it is possible to always attach the bladder 20 to the pressure vessel 17 with sufficient strength and sealing performance. be.

C. Effect of the invention The locking device for the lid of a pressure vessel, etc., configured as described above, when the lid or the lid holding ring is screwed into the opening of the pressure vessel, the locking split ring accommodated in the annular groove A part of the lid comes into contact with the slope provided on the outside of the female thread on the upper edge of the opening of the pressure vessel, and the slope applies an inward compressing force and a pushing force, so that the lid can be stably inserted into the annular groove. Ensures the action of locking etc.

When using bladders made of different materials, by changing the wire diameter of the adjustment split ring that overlaps the locking split ring, you can obtain the appropriate holding amount for each bladder flange made of various materials. By manufacturing with the same mold even if the material is changed, the cost of the mold can be reduced and the cost of the product can be kept to the same level as conventional products. It has the following unique effects.

[Brief explanation of the drawing]

The drawings show an embodiment of the lid locking device for a pressure vessel according to the present invention, and FIG. 1 is a partial vertical sectional front view showing an embodiment of the lid screw type. Figure 2 is an enlarged longitudinal sectional front view of the main parts of the same as above. FIG. 3 is a partial vertical sectional front view showing an embodiment of the presser ring screw type. FIG. 4 is an enlarged vertical sectional front view of the main parts of the same as above. 1,17...Pressure vessel, 2,18...Opening, 1
0,30...Female thread, 11,29...Male thread,
5, 20... Bladder, 6, 21... Flange,
3, 19...Storage part, 8, 22...Lid body, 28...
... Holder ring, 12, 31 ... Annular groove, 14, 32
... Split ring for locking, 16, 34... Split ring for adjustment, 15, 33... Slope.

Claims (1)

[Scope of utility model registration request] The male thread on the peripheral surface or the male thread of the lid holding ring is screwed into the female thread of the opening in the pressure vessel, thereby holding the flange of the bladder supported by the step part of the opening and closing the opening. the lid body to be made;
Alternatively, an annular groove is formed on the upper outer periphery of the lid holding ring, a rigid locking split ring in which a part of the circular cross section protrudes outside the annular groove, and a rigid adjustment split ring that overlaps the split ring. and a portion of the locking split ring protruding from the annular groove is brought into contact with an inclined surface provided on the outside of the female thread at the upper edge of the opening of the pressure vessel. A locking device for the lid, etc.