JPH0750103B2 - Pressure breathing test equipment - Google Patents

Description

The present invention relates to a pressure breathing test apparatus.

(Prior Art) A pressurized breathing tester is used to test the concrete before hardening for its pumpability, etc., by filling freshly kneaded concrete into a test container and applying a prescribed pressure for a prescribed time. This is done by forcibly draining the water in the concrete.

FIG. 4 shows a schematic view of a conventional pressure breathing test apparatus.

The pressure breathing test device 51 includes a test container 53 that contains concrete C, a hydraulic cylinder 55 attached to the test container 53, and a manual hydraulic pump 59 that is connected to the hydraulic cylinder 55 via a hose 57. It is configured.

The test container 53 includes a container body 61 and a lid 63 detachably attached to the container body 61.

A drain portion 65 is provided at the bottom of the test container 53, and the drain portion 65 includes a drain cock 67.

The hydraulic cylinder 55 is erected on the lid 63, and the piston rod 69 and the piston 71 of the hydraulic cylinder 55 are vertically provided inside the container body 61.

In FIG. 4, 73 is an O-ring mounted on the piston 71, and 75 is a pressure gauge provided on the hydraulic pump 59.

In the pressure breathing test, first, the lid 63 is removed, concrete C is put in the container body 61, and the lid 63 is attached to the container body 61.

Next, the hydraulic pump 59 is operated while watching the pressure gauge 75. Then, the test is always performed while adjusting the pressing force.

(Problems to be solved by the invention) Therefore, in the conventional test apparatus, the lid 63 is provided with a hydraulic cylinder.
Since it has the 55, the piston 71, etc., the lid 63 is heavy and bulky, and the handling of the lid 63 during the test was inconvenient.

Further, during the test, the hydraulic pump 59 must be operated at all times, which is very troublesome, and the resistance of the hose 57 and the resistance of the O-ring 73 cause the pressure indicated by the pressure gauge 75 to be displayed. There is also a problem that does not always act on concrete C accurately.

The present invention has been devised in view of the above circumstances, and an object of the present invention is to reduce the weight of the lid and make it compact so that the lid can be handled easily, and further, some labor is required during the test. An object is to provide a pressure breathing test device capable of performing a test at an accurate pressurization pressure without any action.

(Means for Solving the Problems) A configuration of the present invention for achieving the above-mentioned object will be described with reference to FIGS. 1 to 3 corresponding to the embodiments.

The present invention has a container body 9 having a drainage part 13 and an open upper part.
And a lid body detachably attached to the upper part of the container body 9.
11, an expansion chamber 5 that is provided between the lid 11 and the container body 9 and expands to the lower side of the container body 9 by the supply of pressurized fluid;
The expansion chamber 5 is provided with a pressure supply means 7 for supplying a pressurized fluid, and the expansion chamber 5 expands and contracts at least at a boundary between the upper surface of the concrete C contained in the container body 9 and the expansion chamber 5. It is characterized by being composed of a possible film body 31.

The film body 31 can be attached to the test container 3 by sandwiching the peripheral edge 31B between the container body 9 and the lid body 11.

Further, the expansion chamber 5 can be formed of a single bag made of the film body 31.

The pressure supply means 7 can be composed of a pressure supply source 27 connected to the expansion chamber 5 and a pressure control valve 25 provided in a path 23 between the expansion chamber 5 and the pressure supply source 27.

(Operation) The lid 11 does not have a hydraulic cylinder, piston, etc., unlike the conventional case, and therefore the lid 11 can be made lighter and more compact, and the lid 11 can be easily handled during the test.

Further, when the pressure supply means 7 is composed of the pressure supply source 27 and the pressure adjusting valve 25, the test pressure becomes accurate, and the pressure breathing test can be easily performed without any trouble.

(Embodiment) A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic view of a pressure breathing test apparatus according to the present invention, FIG. 2 is a perspective view of a film body, and FIG. 3 is an enlarged cross-sectional view of a connecting portion between a container body and a lid.

Reference numeral 1 is a pressure breathing test device, 3 is a test container, an expansion chamber 5 is formed inside the test container 3, and a pressure supply means 7 is connected to the expansion chamber 5.

The test container 3 is composed of a container body 9 having an open top and a lid 11, and the container body 9 is provided with a drainage section 13 and a drainage cock 15.

The lid 11 is provided with a pressure gauge 17, a pressure release cock 19, and a pressure cock 21, and a nitrogen gas cylinder 27 is connected to the pressure cock 21 via a hose 23 and a regulator 25. In the embodiment, these hoses 23 and regulators are used. The pressure supply means 7 is constituted by the nitrogen gas cylinder 27 and the nitrogen gas cylinder 27.

In the embodiment, the expansion chamber 5 is composed of the lower surface of the lid 11 and the film 31.

The film body 31 is formed of a stretchable member such as rubber, and in the embodiment, as shown in FIG. 2, is composed of a cylindrical portion 31A and a flange portion 31B formed on the upper edge of the cylindrical portion 31A. ing.

To attach the film body 31 to the test container 3, as shown in FIG. 3, the flange portion 31B is placed on the flange portion 9A above the container body 9 and the lid body 11 is attached.
And the flange portion 9A of the container body 9 are fastened with bolts B and nuts N, and the flange portion 31B of the film body 31 is sandwiched.

In the embodiment, in order to improve the airtightness, the O-ring 33 is fitted in the annular groove on the lower surface of the lid 11.

In the pressure breathing test, first, concrete C is put in the container body 9 and the collar portion 31B of the film body 31 is connected to the collar portion 9 of the container body 9.
Place on A and fasten the lid 11 to the container body 9.

Next, set the regulator 25 to the specified pressure and pressurize the cock.
21 is opened and the pressurized fluid in the nitrogen gas cylinder 27 is supplied to the expansion chamber 5.

As a result, the expansion chamber 5 is constantly maintained at a predetermined pressure, and the pressure of the expansion chamber 5 causes the water in the concrete to be discharged from the drainage section 13. The concrete surface drops as the water drains, but the film body
As 31 stretches, it follows the concrete surface, and a predetermined pressure is constantly applied to concrete C.

Therefore, according to the present embodiment, unlike the conventional case, the lid body 11 does not have a hydraulic cylinder, a piston or the like. Therefore, the lid body 11 can be made lighter and more compact, and the lid body 11 can be easily handled during the test. Can be done

Moreover, since the pressure in the expansion chamber 5 is displayed on the pressure gauge 17,
Since the pressing force of the concrete C is accurately known and no operation is required during the test, an accurate pressure breathing test can be easily performed without any trouble.

In the embodiment, the case where the film body 31 is attached to the test container 3 is described by sandwiching the film body 31 between the container body 9 and the lid body 11. However, the structure for attaching the film body 31 to the test container 3 is arbitrary.

In addition, although the case where the expansion chamber 5 is formed of the film body 31 and the lid body 11 has been described in the embodiment, the expansion chamber 5 may be formed of a bag body formed of the film body 31.

(Effects of the Invention) As is clear from the above description, according to the present invention, the lid body can be made lighter and more compact so that the lid body can be easily handled, and moreover, the lid body can be accurately handled without any trouble during the test. A pressure breathing test apparatus capable of performing a test with various pressures is obtained.

[Brief description of drawings]

FIG. 1 is a schematic view of a pressure breathing test apparatus according to the present invention, FIG. 2 is a perspective view of a film body, FIG. 3 is an enlarged cross-sectional view of a connecting portion of a container body and a lid body, and FIG. It is a schematic diagram of a pressure breathing test device. In the figure, 1,51 is a pressure breathing test device, 3,53 is a test container, 5 is an expansion chamber, 7 is pressure supply means, 9,61 is a container body, 11,63 is a lid, and 23,57 are Hose, 25 for regulator,
27 is a nitrogen gas cylinder, and 31 is a film body.

Claims (4)

[Claims] 1. A container body having a drainage part and an open upper part, a lid detachably attached to the top of the container body, and a pressurized fluid provided between the lid body and the container body. Is provided with an expansion chamber that expands to the lower side of the container body by the supply of, and a pressure supply unit that supplies a pressurized fluid to the expansion chamber, the expansion chamber at least the upper surface of the concrete housed in the container body and the expansion A pressure breathing test device, characterized in that the boundary between the chamber and the chamber is composed of a stretchable film. 2. The pressure breathing test apparatus according to claim 1, wherein a peripheral edge of the film body is sandwiched between an upper portion of a container body and a lid body. 3. The pressure breathing test apparatus according to claim 1, wherein the expansion chamber is formed of a single bag made of the film body. 4. The pressure supply means comprises a pressure supply source connected to the expansion chamber and a pressure control valve provided in a path between the expansion chamber and the pressure supply source. The pressure breathing test device described.