JPH0441310Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a leak test device for a fluid-tight container having a fluid inlet/outlet portion, such as a plate heat exchanger.

[Prior art and its problems] As is well known, a plate heat exchanger is constructed by stacking rectangular plates with a gasket inserted into each plate, and heat is generated by flowing a high-temperature fluid and a low-temperature fluid through every other plate. Since it is a replaceable type and has many gasket surfaces, it has a low pressure resistance and is prone to fluid leaks. On the other hand, since the amount of liquid retained in the vessel is small and it can be disassembled and cleaned very easily, it has the advantage that it can be applied to objects to be treated that have a large amount of scale adhesion.

In addition, such a heat exchanger must be subjected to a leak test after frequent maintenance such as disassembly and cleaning, and a leak test before shipping.

However, conventionally, leak tests for heat exchangers
This is done by fixing a blind flange to the flange of the fluid inlet/outlet pipe of the heat exchanger with bolts and supplying pressurized air, which improves the workability and economy of the leak test as the heat exchanger becomes larger or more diverse. Both decrease.

[Means for Solving the Problems] The present invention was devised in order to solve the problems of the prior art, and is a leak test device for a fluid-tight container having a fluid inlet/outlet portion. a flat plate-shaped blind flange suspended from a gate-shaped pedestal facing each other; a sealing material affixed to the side of the blind flange facing the fluid-tight container and sealing the fluid inlet/outlet portion; and the blind flange and a supply/discharge member for supplying and discharging a test fluid that penetrates the sealing material and communicates with the entrance/exit portion of the fluid-tight container, a support member that is in close contact with the opposite side of the fluid-tight container of the blind flange, and the support member. A connecting member such as a chain that connects the movable members respectively placed on the supporting member so as to be movable thereon, a connecting member such as a chain that connects the movable members respectively placed on the supporting member, and a connecting member provided between the at least one blind flange and the movable member. An object of the present invention is to provide a leak test device for a fluid-tight container, which is comprised of a tightening member such as a hydraulic cylinder.

[Example] The configuration of the present invention will be explained in detail with reference to an example shown in the accompanying drawings. Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a side view taken in the direction of arrow A in Fig. 1, Fig. 3 is an enlarged view of section B in Fig. 1, and Fig. 4 is a view from C to Fig. 3. A cross-sectional view of C is shown.

This embodiment is a leak test device for performing a leak test of a plate heat exchanger P, for example, and includes:
The plate heat exchanger P that can be tested using the illustrated leak test apparatus is advantageously constructed in such a manner that the inlet and the outlet are provided in opposite directions on both sides. Reference numeral 1 denotes a gate-shaped mount that is moved on a rail 2 by a traveling motor 3, and traversing trolleys 4, 4' are provided on the beam of the gantry-shaped mount 1.
Lifting chain blocks 5, 5' are suspended from the lifting chain 4', and flat blind flanges 7, 7' are suspended from the lifting chain blocks 5, 5', respectively. Therefore, the blind flanges 7, 7' are provided facing each other with the plate heat exchanger P (fluid-tight container) interposed therebetween.

Plate heat exchanger P of the blind flanges 7, 7'
Neoprene sponge rubber 8,8' on the side facing the
A sealant is attached.

Support members 10, 10' are mounted on opposite sides of the sealing surfaces of the blind flanges 7, 7', and movable members 9, such as H-shaped steel, are mounted on the support members 10, 10'.
9' is movably mounted. Connecting members such as a chain 11 and a hook 12 (only one of each is shown), which are divided into long and short lengths, are provided at both ends of the moving members 9 and 9', and the plate heat exchanger P is sandwiched between the moving members 9 and 9'. The movable members 9, 9' facing each other can be connected to each other by a chain 11 (even if the size of the chain blocks 5, 5' changes, the length of the chain 11 can be adjusted).

Furthermore, at least one of the movable members 9 is provided with an equalizing piece 13 and a catch seat 14 provided at the center thereof, as shown in FIG. 4, so that the forces applied to both ends of the movable member 9 can be averaged. There is. Further, a tightening member 15 such as a hydraulic cylinder is attached to the other moving member 9' side, and is configured to receive pressure oil from a hydraulic pump 16 and push the catch seat 14'.

Therefore, the movable member 9' moves outward (in the direction away from the blind flange 7'), and as a result of widening the distance between the movable members 9, 9', the reaction force causes the blind flange 7,
7' is pressed against the plate heat exchanger P.

Pressurized air for testing is supplied from a hose 17 via a flow meter F, and the back pressure applied to the plate heat exchanger P is led to a pressure gauge G through a pressure guide pipe 18 and is indicated. When the back pressure specified for the heat exchanger P is set with the flow rate adjustment valve, the fluid meter F
Read the amount of air flowing through (=leakage amount).

The product to be tested, that is, the plate heat exchanger P, is placed on a pedestal (or lifting platform) 19.

The present leak test device can be configured to have an automated hydraulic circuit, a limit switch, a photo switch, an elevating chain block, an elevating platform, and an electric trolley, thereby making it an automatic device using sequence control.

Since this embodiment has the configuration described above, it has the following effects.

The plate heat exchanger P is placed on the pedestal 19 so that the plate surface faces the blind flanges 7, 7'. The portal frame 1 is moved by the traveling motor 3, and the center of the heat exchanger P and the blind flanges 7, 7' are moved.
Align the center of the Next, operate the lifting chain blocks 5, 5' to adjust the height, operate the traversing trolleys 4, 4', and move the blind flanges 7, 7' to the flange surface of the inlet/outlet pipe of the heat exchanger P. Align it with the flange surface of the plate.

Next, the long and short chains 11 are engaged with the hooks 12 to connect the movable members 9 and 9' to each other. Then, after setting a pressure switch (not shown) attached to the hydraulic pump 16 to the necessary pressing force of the hydraulic cylinder 15, when the hydraulic pimp 16 is started, the rod of the hydraulic cylinder 15 extends and the movable member 9 moves to the indicating member 10.
Slide the top and tension the chain 11, blind flange 7,
7' is pressed against the flange surface of the inlet/outlet pipe or plate of the heat exchanger P.

Therefore, by supplying pressurized air to the heat exchanger P via the hose 17 and adjusting it with a fluid adjustment valve, the air on the supply side and the leaked air are balanced at a predetermined pressure. At this time, the amount of leakage (the amount of air flowing) is read with a rotameter installed on the supply side.
In addition, the temperature and pressure are read and flow rate correction is performed as necessary.

Next, in order to remove the heat exchanger P that has undergone the test from the leak test device, the above-described non-return procedure may be followed.

Although this embodiment has described a leak test device that performs a leak test of a heat exchanger using pressurized air, the present invention is not limited to this, and the present invention is not limited to this. It can also be applied to leak test equipment. Further, the present invention is not limited to a leak test device configured with multiple plates or applied to a fluid-tight container, but can also be applied to a fluid-tight container in which a fluid inlet/outlet portion is provided on one side.

In summary, since the present invention adopts the structure described in the claims for utility model registration, it has the following effects.

[Effect of the invention] Since a fluid-tight container of any size can be simply clamped with a pair of flat blind flanges, a bolt or other joining means is required to join the blind flanges to the fluid-tight container. It is not necessary to use a seal, improving work efficiency, and since the seal does not become a consumable gasket, it is also economically advantageous. Further, since the blind flanges are connected to each other by a connecting member whose length can be adjusted arbitrarily and are clamped by a tightening member, the range of application to test items of different sizes can be expanded.

[Brief explanation of the drawing]

Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a side view taken in the direction of arrow A in Fig. 1, Fig. 3 is an enlarged view of section B in Fig. 1, and Fig. 4 is a view from C to Fig. 3. A cross-sectional view of C is shown. 7, 7'... Blind flange, 8, 8'... Sealing material, 9, 9'... Moving member, 11... Chain (connecting member), 15... Hydraulic cylinder (tightening member), 1
7...Hose.

Claims (1)

[Scope of utility model registration request] In a leak test device for a fluid-tight container having an inlet/outlet section for fluid, a flat blind flange is suspended from a gate-shaped pedestal with the fluid-tight container facing each other, and a side of the blind flange facing the fluid-tight container is used. a sealing material that is affixed and sealed to the fluid inlet/outlet section; a supply/discharge member that passes through the blind flange and the sealing material and communicates with the inlet/outlet section of the fluid-tight container for supplying and discharging the test fluid; A support member that is in close contact with the opposite side of the fluid-tight container of a blind flange, a movable member that is movably placed on the support member, and a chain that connects the movable members that are respectively placed on the support member to each other. A leak testing device for a fluid-tight container comprising a connecting member and a tightening member such as a hydraulic cylinder provided between the at least one blind flange and the movable member.