JPS6038471B2 - How to tighten filter press type battery case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for attaching a filter press type battery case.

A filter press type battery case has a structure in which an ion exchange membrane, a monkey cloth, a gasket material, etc. are interposed between many unit case frames, and these are tightened.

Using a container with such a device, concentration and deionization by dialysis of ions, double decomposition, separation of acids and alkalis, etc.; decomposition of salts using electrode reactions, for example, production of caustic soda, chlorine, and hydrogen from common salt; or organic substances. Synthesis, etc. are performed. Conventionally, hydraulic machines (
It is a general term for machines that use liquids such as water and oil as pressure transmission media).

In this case, there is a reduction in the clamping pressure due to leakage of pressure oil, which in turn causes problems such as leakage of liquid or gas from between the units of the filter press type electrolytic cell. For example, in the electrolysis of an aqueous alkali metal salt solution using an ion exchange membrane method,
Leakage of the contents is extremely dangerous as it produces toxic substances such as chlorine gas and caustic soda, and may also cause electrical leakage, so leakage of the contents must be avoided as much as possible. On the other hand, in order to maintain the pressurized state of the hydraulic machine, a method is known in which a mechanical locking mechanism is loosely fitted to prevent the pressure transmitting piston rod from retreating using a pin or a lock nut.

However, in a filter press type cell, for example, an ion exchange membrane method salt electrolytic cell, it is usually 50 to 1000
Since the tank is operated at a relatively high temperature, the thermal expansion of the filter press tank frame cannot be ignored. That is, there is a risk of over-tightening during operation, which not only promotes permanent deformation of the packing, but also causes damage to the ion exchange membrane, gag cloth, bulkhead, etc. that are sandwiched between the packings. Furthermore, when the position of the piston of a hydraulic machine is mechanically fixed, the tightening pressure decreases due to the creep property of the packing material. In particular, rubber used for packing not only has a large creep property at high temperatures, but also has a reduced elastic recovery power due to the action of chemicals such as alkali and chlorine, resulting in a noticeable drop in tightening pressure. In order to compensate for the above-mentioned drawbacks, the present inventors developed a method for tightening a filter press type battery case using a hydraulic machine having a back-back prevention mechanism and compression via a plurality of disc springs. It was proposed as No. 2435.

The present invention further provides a method for making this method work effectively.
That is, the present invention is characterized by the use of a tightening device in which disc springs are interposed between the pressure mechanism and the cotton attachment plate and between the end of the dew tank and the fixing plate. Further, it is preferable that a plurality of disc springs are installed in parallel and/or in series. A feature of the present invention is that a disc spring is interposed especially on the side facing the fixed plate.

In this way, variations in length due to expansion and contraction of the dew tank are absorbed by the disc springs at both ends. That is, filter press type lightning tanks have become increasingly larger in recent years, and as the weight of each unit tank increases, the number of unit tanks also increases, ranging from 40 to 10 units. Therefore, a considerably large force is required to move the unit battery case in the lateral direction. Moreover, this requires greater force as the number of unit containers increases. Further, the gasket must be made of an elastic material for its original purpose of maintaining a sealing effect. In this case, the elongation due to thermal expansion of the battery case makes it impossible to extend the length of the torpedo cell to match the expansion of each unit case, no matter how much the pressure transmission mechanism of the vertical mounting machine is a constant clamping pressure type. This allows the expansion of the unit batteries to be absorbed by the unnatural distortion of the gaskets, starting at least from the side of the unit batteries closer to the fixing plate. Such vertical unevenness may cause not only damage to the gasket, but also damage to the ion exchange membrane etc. sandwiched between the gaskets. Furthermore, there is a possibility that leakage of the dew tank may occur. Therefore, the present invention eliminates the above-mentioned drawbacks, and can be expected to have sufficient effects with an extremely simple mechanism. This will be explained with reference to the drawings below. FIG. 1 is a plan view of a filter press type battery case and an attaching machine.

FIG. 2 is a diagram of the pressure transmission mechanism of the tightening machine, particularly the mechanism for following changes in the length of the tortoise tank using a disc spring.

FIGS. 3 and 4 are diagrams showing an example of a mechanism for following changes in flea tank length using a disc spring on the fixed plate side of the tightening machine.

A more detailed explanation will be given based on each of the above drawings.

In FIG. 1, 1 is each unit battery case. A gasket (not shown) is interposed between each of these unit containers. 2 is a diluting machine (also called a hydraulic machine), and 3 is a pressure generating mechanism (also called a pressurizing mechanism), which usually consists of a hydraulic cylinder and a piston.

4 is a pressure transmission mechanism, which is usually a piston rod.

5 is a vertical mounting board.

6 is a fixed plate, and 7 is a side bar.

In addition, Fig. 2 is an example of a part imitating a disc 1 interposed between a pressure mechanism and a vertical plate, and in this example, a plurality of disc springs 8 are connected in series at the tip of a piston rod as a pressure transmission mechanism. exists in FIG. 3 shows an example of the structure of the fixed plate 6 side. In this example, there is a back plate 9 opposite to the fixing plate 6 and in contact with the end of the unit battery case 1, and the back plate has a plurality of guide rods 10, each of which has a hole formed in the fixing plate 6 at its tip. is engaged with. It is best to install the guide rod 1 at an appropriate position such as the center of the backboard or near the four corners. In this example, agenda guide Aya 101
A plurality of disc springs 11 are inserted. It is preferable that the spring constant synthesized by these disc springs 11 is designed to be approximately the same as that of the disc spring 8. By doing this, each unit battery case group has its both ends pressed and supported by disc springs. FIG. 4 is another example of a portion corresponding to FIG. 3.

This example has a hydraulic cylinder 12 in the center. The reason for doing this is that when assembling the dew tank, the position of the piston 13 of the hydraulic machine is adjusted and the disc spring 11 is locked and fixed by the back-back prevention device 14 while maintaining almost the free thickness. After the assembly of the tank tank is completed, oil is supplied from (2) using a manual pump or the like, and after the lock of the backward prevention device 14 is released, the hydraulic pressure is reduced and the pressure of attaching the tank is received by the disc spring 11.
With such a device, it is possible to easily equalize the vertical mounting pressure when assembling the dew tank. Of course, in the present invention, the structure near the fixed plate is not limited to this example.

[Brief explanation of drawings]

Figure 1 is a plan view of the filter press type battery case, and
The figure is an example of a mechanism for following changes in dew tank length using a disc spring on the hydraulic machine side, and Figures 3 and 4 are examples of a mechanism for following changes in dew tank length using a disc spring on the fixed plate side. FIG. In the figure, 1 is a unit battery case, 2 is a hydraulic machine, 3 is a hydraulic cylinder part, 4 is a pressure transmission mechanism, 5 is a tightening plate, 6 is a fixing plate, 7 is a side bar, 8 is a disc spring on the tightening plate side, 9 is a backboard, 101
1 is a protrusion engaged with a hole in the fixed plate; 11 is a plate spring on the fixed plate side; 12 is a hydraulic cylinder on the fixed plate side; 13 is a piston;
4 is a piston retreat prevention mechanism. Moxibustion '1 phantom o 21 phantom flame 3 nada 亥}'phantom

Claims (1)

[Claims] 1. Tightening of a filter press type battery case characterized by using a tightening device in which a disc spring is interposed between the pressure mechanism and the clamping plate and between the end of the battery case and the fixing plate. Method. 2. The method according to claim 1, wherein the pressurizing mechanism is a hydraulic machine, and the tightening device has a mechanism for preventing the pressure transmitting piston rod from retreating. 3. The method according to claim 1, which uses a tightening device having a hydraulic mechanism within the fixed plate. 4 The back plate at the end of the battery case has a protrusion that serves as a guide rod, and this protrusion engages with a guide hole provided on the fixed plate, so that it always follows normally even when the battery case expands or contracts. 2. A method as claimed in claim 1, in which a tightening device is used.