JPS5830569Y2 - Hydraulic clamp for filter press with horizontal plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to a chemical machine and to the manufacture of a filter press with horizontal plates, and in particular to a hydraulic clamp of said filter press.

This invention can also be used in other types of presses where reliable compression by plates is required.

Various types of hydraulic clamps for filter presses with horizontal pressure plates are currently widely available, each clamp consisting of a mechanism for pushing up the pressure plate of the filter press and a retainer for holding the pressure plate in the pushed-up position. Are known.

Said mechanism for pushing and lifting the pressure plate is constituted by a vertical hydraulic cylinder (see, for example, USSR Inventor's Certificate No. 258271), the ram of which is connected to said pressure plate and , has a trapezoidal screw for actuating a locking nut-shaped gear, which acts as a retainer to hold the ram together with the pressure plate in a raised position.

The above-mentioned collar gears are moved along the ram by a hydraulic drive.

As the ram rises, the nut gear also rises and switches on the hydraulic drive for rotating it, which lowers the nut gear into abutment against the body of the hydraulic cylinder.

If the downward movement of the nut-shaped gear is faster than the upward movement of the ram, when the gear reaches a certain position, the hydraulic drive is switched off and rotation and lowering are stopped.

Once raised with the ram, the said gear switches on its hydraulic drive again and continues to descend along h.

If the downward movement of the nut-shaped gear is slower than the -L upward movement of the ram, the gear will rise with the ram and cut off the oil supply into the vertical hydraulic cylinder, so the ram will stop but the gear will It descends, and when it reaches a certain position, the supply of oil into the hydraulic cylinder is started, so the ram rises again and the gear continues to descend.

When the pressure plate is raised all the way to -L, the nut-like gear descends and hits the stop, locking the ram from lowering F under the action of the operating pressure in the filter press.

When the filtration is complete, the hydraulic drive is started and rotates the nut-shaped gear in the opposite direction, so that the teeth [F] rise along the aforementioned lines, but the ram is connected to the pressure plate and the cellars 1 to 1.
It decreases by 1 depending on the weight of the filter element.

The operation of such hydraulic clamps requires complex adjustment of the synchronized movement of the nut-shaped gear and the ram, an intricate control system for each hydraulic clamp, and a pneumatic hydraulic drive for the nut-shaped gear to prevent deflection. This involves the need for oil to be supplied by a hose and manufacturing difficulties.

In addition, this type of hydraulic press increases the height of the filter press, complicating its maintenance during operation.

According to another type of pressure plate lifting mechanism covered by Soviet Inventor's Certificate No. 371955, the mechanism comprises eight levers interconnected by joints and two rods articulated to the levers. It is separated from the horizontal hydraulic cylinder.

The pressure plate is fixed in the upper position by two vertical wedges, each of which is provided with its own hydraulic cylinder for moving it up and down.

However, hydraulic clamps of this design incorporate numerous friction members made of non-ferrous metals that often require lubrication.

Some hydraulic clamps for filter presses, which are well known in the prior art, have a vertical hydraulic cylinder whose ram supports the pressure plate of the filter press.

When the first cylinder is supplied with oil, its ram pushes the pressure plate to the upper position with enough force to clamp each filter element of the press.

The pressure created by the screws 1 to hold the ram together with the pressure plate in its raised position is b
The force generated in the breath is exceeded during the process, and the filter press is not allowed to open during the operating cycle.

However, applying high pressure through the piston and maintaining the piston in a high horizontal plane throughout the filtering period requires a tremendous amount of energy consumption.

The purpose of the present invention is to eliminate the above-mentioned f benefits.

The main purpose of the present invention is that the design is simple, does not increase the height of the breather, can reliably hold the pressurizing plate in its pressed position throughout the filtration process, and has a small pressure plate. An object of the present invention is to provide a hydraulic clamp for a filter press having a horizontal plate of 1.

The second purpose is: Fixed hydraulic cylinder 2 to press the pressure plate 1
A horizontal hole 10 is provided in the ram 9 of 1Qf-1-1, and a wedge-shaped retainer 3 is inserted into the horizontal hole 10 when the pressure plate 1 is pressed.
The cage 3 is configured in a cylindrical shape 7, and two supply and exhaust pipes 18.1 are arranged concentrically between the inside of the cylinder and the pressure source.
This is achieved by providing a hydraulic clamp for a filter press having a horizontal plate connected by a rod 15 consisting of 9 rods 15 and allowing the holder 3 to reciprocate along this rod 15 to achieve miniaturization of the device. It was.

It is expedient to design the body of the movable hydraulic cylinder in the form of a wedge, thereby ensuring adjustment of the stroke of the pressure plate.

On the inclined surface of the body of the movable hydraulic cylinder is also fitted a strip made of a material with a large coefficient of friction, thereby ensuring that the ram of said fixed hydraulic cylinder is held in its raised position together with the pressure plate. It is preferable to increase the quality.

Thus, the hydraulic clamp according to the invention can be miniaturized, does not require a lot of metal for its manufacture, is easy to manufacture and maintain, and the pressure applied to the gasket and diaphragm of the press is constant. The rated inherent pressure increases their useful life and does not require large amounts of power as power is primarily needed to turn each hydraulic cylinder on and off.

Next, an embodiment of a hydraulic clamp for a filter press having a horizontal plate according to the present invention will be described in detail with reference to the accompanying drawings.

Hydraulic clamps are used in well-known filter presses having a horizontal plate (not shown to avoid obscuring the subject matter of the invention) and for pushing up the pressure plate 1 of the filter press. It has a built-in mechanism.

Said mechanism for raising the pressure plate 1 is constituted by a fixed vertical hydraulic cylinder 2 and a retainer 3.

The body 4 of the hydraulic cylinder has a shoulder 5 supported on a support plate 6 .

The body 4 of the cylinder 2 also houses a piston 7 with a sealing element 8 and a ram 9 fixed to the piston 7.

The ram 9 is connected at its free end to the pressure plate 1 and has a lateral hole 10.

The retainer 3 is designed to hold the ram 9 together with the pressure plate 1 in a raised position and is constituted by a horizontally movable double-acting hydraulic cylinder 11,
The body of the cylinder is wedge-shaped as shown in FIGS. 1 and 2.

The piston 12 of said hydraulic cylinder divides its cavity into two working cavities 13 and 14 and the rod 1
5; its rod 15 is fixed to the two vertical cavities 1
6 and 17 (Fig. 2), and among these spaces,
The void 16 always communicates with the void 14, and the void 17 always communicates with the void 13.

According to the type of clamp shown in FIG.
It is formed by two concentric tubes 18 and 19, the cavity of tube 19 serving as cavity 17 and the cavity between said two tubes forming cavity 16.

Each open end of tube 19 communicates with cavity 13 and a pressure source (not shown).

The tube 18 is provided with a hole 20 communicating with the cavity 14 and a hole 21 communicating with a pressure source (not shown).

Cavities 17 and 16 are periodically placed in communication with a pressure source.

The operation of the hydraulic cylinders 2 and 11 is controlled by any known circuit connected to the control of the press, but such circuits are well known to those skilled in the art and will not be described here.

A main body 22 having a union tube 23 connected to a pressure source is mounted on the outer surface of the portion of the tube 18 having the hole 21.

The tubes 18 and 19 are fixedly interconnected by an intermediate element 24 which has an external thread for passing through a hole in the bracket 25 and for screwing into a nut 26.

Said nut is screwed onto the intermediate element 24 on the other side of the bracket 25, thereby firmly fixing the rod 15.

The racket 25 is fixed on a horizontal beam 27 mounted on the body 4 of the hydraulic cylinder 2.

When the hydraulic cylinder 11 is located in the bore 10 of the ram 9, the body of the cylinder 11 rests on the body 4 of the hydraulic cylinder 2, as shown in FIG.

In order to increase the support surface, the bore 10 of the ram 9 accommodates a liner 28 with an inclined surface, whereas the inclined surface 29 of the body of the hydraulic cylinder 11 has a liner 28 with a high coefficient of friction. A strip 30 made of material, for example titanium, is provided.

To adjust the stroke of the pressure plate, the liner 28 is provided with a replaceable strip 31 that contacts the strip 30.

If necessary, the strip 31 can be replaced with another of a different thickness.

The hydraulic clamp according to the invention operates as follows.

A working fluid is supplied into the cavity 32 (FIG. 1) of the hydraulic cylinder 2 in the direction of arrow A, which fluid pushes the piston 7 up together with the ram 9.

The pressure plate 1 of the filter press rises together with the ram 9,
This tightens each plate within the filter.

When the pressure in the hydraulic cylinder 2 reaches a certain level necessary to generate the required squeezing force and seal the interplate spaces in the filter, the hydraulic cylinder 11 is automatically activated. .

The working fluid is supplied from the pressure source to the cavity 17 of the rod 15 (Fig. 2).
It is fed into the cavity 13 of the hydraulic cylinder 11 through.

Since the rod 15 and the piston 12 of the hydraulic cylinder 11 are stationary, the body of the hydraulic cylinder 11 starts to move under the pressure of the fluid in the cavity 13 and enters the bore 10 of the ram 9.

The cylinder 11 continues to operate until its strip 30 abuts the liner strip 31, in which case the cylinder 11 is supported by the body 4-L of the hydraulic cylinder 2 as shown in FIG. , securely locking the rams 9 together with the pressure plate 1 in their raised position.

The pressure generated in the filter breath during the filtration process is completely absorbed by the hydraulic cylinder 11 stationary in the hydraulic cylinder 2-L.

After the ram 9 is immobilized in the depressed position, the pressure of the fluid in the cylinders 2 and 11 is relieved, but the service fluid is not removed.

After the filtration is completed, the hydraulic cylinder 11 is moved to the hole 1 of the ram 9.
0, and for this purpose the cavity 13 of the hydraulic synonda 11 is connected through the cavity 17 of the rod 15 to a low-pressure hydraulic line, and the cavity 14 is connected through a cavity 16 to a pressure source. It is forced to communicate.

As a result, the body of the hydraulic cylinder 11 is acted upon by the pressure of the fluid pumped into the cavity 14 through the cavity 16 and begins to move in the opposite direction with respect to the piston 12.

As the hydraulic cylinder 11 is retracted from the hole 10 in the ram 9, the ram 9 is lowered by the weight of the pressure plate 1 and each filter plate and forces fluid out of the cavity 32 of the hydraulic cylinder 2.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings illustrate an embodiment of the invention. FIG. 1 is a schematic longitudinal sectional view of the hydraulic clamp according to the present invention, showing a state in which the pressure plate is held in a pushed up position; FIG. 2 is a longitudinal sectional view of the retainer. 1... Fixed hydraulic cylinder; 3... Retainer; 9... Ram; 10... Ram hole:
11...Movable hydraulic cylinder; 13,14...
...Vacancy in hydraulic cylinder 11: 15... Rod: 16, 17... Vertical space; 29...
...Slope; 30...Strip.

Claims (1)

[Scope of utility model registration request] 1. a mechanism for raising the pressure plate, the mechanism being in the form of a vertical fixed hydraulic cylinder, the ram being connected to said pressure plate and having a lateral hole in which a retainer is placed; In a hydraulic clamp for a filter press having a horizontal plate adapted to hold the ram in a raised position together with the pressure plate by receiving the retainer 3;
is constituted by a horizontally movable hydraulic cylinder 11 whose rod 15 is connected to two concentrically arranged cavities 16 and 17 extending in its axial direction.
two tubes 18 and 19, and this rod 15 is immovably fixed to the fixed hydraulic cylinder 2, the cavities 16 and 17 being connected to the cavity 14 of the movable hydraulic cylinder 11.
A hydraulic clamp for a filter press having a horizontal plate, characterized in that the horizontal plate is always in communication with the pressure source and the pressure source. 2. Utility model registration claim 1, characterized in that the main body of the movable hydraulic clamp 11 is formed in the shape of a wedge.
Hydraulic clamp as described in section. 3. The utility model according to claim 2, characterized in that a strip 30 made of a material with a large friction coefficient is attached on the inclined surface of the main body of the movable hydraulic cylinder 11. Hydraulic clamp.