RU141211U1 - HYDRAULIC CLAMPING DEVICE - Google Patents

Abstract

1. The hydraulic clamping device used to secure the shut-off and control valves, characterized in that it contains a frame, inside which there is a mechanical synchronization unit, on the upper surface of the frame there is a longitudinal guide with a groove in which two grips are inserted, made to move along guide in the horizontal plane, an emphasis made with the possibility of controlled movement up and down in the vertical plane along the bed using two hydraulic cylinders, cat cylinders They are rigidly fixed in the lower part of the side walls of the bed brackets, the rods are rigidly fixed at the top of the sidewalls of the stop, and the upper and lower cavities of the hydraulic cylinders are connected by upper and lower tubes with a hydraulic station that is able to synchronize the operation of the hydraulic cylinders of the stop and adjust the clamping force. 2. The device according to claim 1, characterized in that the bed comprises a base, two side brackets of the bed and the upper beam of the bed. 3. The device according to claim 1, characterized in that the grip comprises a rigidly fixed clamp equipped with a handle, a clamp base, the width of which is greater than the thickness of the clamp, and a clamp, with mesh corrugation applied to the upper surface of the base. The device according to claim 1, characterized in that the shape of the groove of the longitudinal guide corresponds to the shape of the lower part of the grip, while a slip gasket is embedded in the groove. 5. The device according to claim 1, characterized in that the emphasis contains two sidewalls of the emphasis and the upper beam of the emphasis, which contains two lodgements installed at an angle of 120 ° with a gap between them, and an overlay in the central part, the width of the gap

Description

The utility model relates to devices for clamping workpieces and can be used for assembly or disassembly, visual inspection, repair or maintenance of shut-off and control valves and other elements.

Shutoff and control valves include wedge gate valves, shutoff, regulating, cut-off valves, ball and plug valves. For fastening valves of large sizes and masses, a large clamping force is required, which leads to the need for pneumatic or hydraulic drives.

Known vice with a mechano-hydraulic amplifier according to the patent for invention RU No. 2144979 C1, IPC B25B 1/18, publ. 01/20/1999, which contain a housing, a fixed and a movable jaw, a lead screw. The mechanohydraulic amplifier is mounted on the lead screw, near the handle. The piston transfers the clamping force from the cylinder to the movable jaw through the shaft. The plunger is spring loaded relative to the cylinder by a spring, which ensures the plunger returns when the part is expanded. The articulated lever frame, consisting of a lever, a sleeve, a screw and a lever, is used as a support for the movable jaw through the lead screw. To move the movable jaw to another position, a bevel gear is used and the handle The frame eliminates the bending moment in the housing, allowing you to precisely base the clamped part. However, the design of the vice according to patent RU No. 2144979 does not provide reliable clamping of valves.

In the patent for invention RU No. 2498042 C2, IPC E21B 19/06, E21B 19/16, B2B 13/52, publ. 11/10/2013, a hydraulic clamping device is described, which comprises a clamp mounted on a support inside the frame, to which the body of the hydraulic cylinder having a piston is rigidly attached and configured to create a force directed along the longitudinal axis of the hydraulic cylinder and applied to the clamp. An intermediate component adjoins the piston of the hydraulic cylinder and the clamp, at one end of which there is a spherical end portion included in the spherical support located in the piston. The device provides a weakening of the efforts on the piston of the hydraulic cylinder acting on the clamp in directions other than the direction of the longitudinal axis of the hydraulic cylinder. The hydraulic clamping device according to the patent RU No. 2498042 is especially effective for use in a power vice for clamping a pipe along its outer surface, however, its use for clamping shut-off and control valves is difficult.

The hydraulic clamping device of the strip unwinder of the strip according to the RF patent for invention No. 2455095 C1, IPC B21C 47/18, contains two hydraulic cylinders arranged horizontally and control hydraulic equipment, which is made in the form of three directional valves. The first control valve is connected to the first hydraulic cylinder and is equipped with check and pressure reducing valves for connecting to the pump and safety and check valves for connecting to the drain. The second valve is equipped with a hydraulic lock connecting it to the second hydraulic cylinder, and the third valve is equipped with a throttle for connecting it to the drain. The invention according to patent No. 2455095 allows to increase the reliability of gripping the rolls of strip, however, it does not provide a reliable capture of shut-off and control valves.

Closest to the claimed clamping hydraulic device is a hydraulic power and adjustment unit for a lifting device with two legs with independent drives acting simultaneously, according to the RF patent for invention No. 2495283 C2, IPC F15B 11/22, publ. 10/10/2013, which is adopted as a prototype. The hydraulic assembly comprises a supply and return fluid circulating therein for two hydraulic vertical lifting devices, and preferably comprises: a balancing valve controlling lowering of the platforms; a dividing valve, which allows you to divide the fluid into two streams at the same speed, each of which provides power to one of the hydraulic lifting devices; and an electromagnetic control valve, which when adjusting the hydraulic lifting devices by the operator, regardless of their direction and position, isolates one of the hydraulic devices to stop it, while the other device continues to work. The hydraulic unit allows you to change and adjust the level of the supported platform due to the synchronization of the operation of hydraulic devices, however it is not equipped with grippers for attaching shut-off and control valves.

The objective of this utility model is to create a clamping hydraulic device that creates a large clamping force when securing shut-off and control valves.

The technical result achieved by the implementation of this utility model is to increase the reliability of fastening of shut-off and control valves for assembly or disassembly.

The problem with the achievement of the specified technical result is solved in that the hydraulic clamping device, according to the utility model, comprises a frame, inside which there is a mechanical synchronization unit, on the upper surface of the frame there is a longitudinal guide with a groove in which two grips are inserted, made to move along the guide in the horizontal plane, an emphasis made with the possibility of controlled movement up and down in a vertical plane along the bed using two hydraulic cylinders, the cylinders of which are rigidly fixed in the lower part of the side walls of the frame brackets, the rods are rigidly fixed at the top of the stop sidewalls, and the upper and lower cavities of the hydraulic cylinders are connected by upper and lower tubes to a hydraulic station, which is capable of synchronizing the operation of hydraulic cylinders and adjusting the clamping force.

The technical result is also achieved by the fact that:

the bed contains a base, two side brackets of the bed and the upper beam of the bed;

the gripper contains a rigidly fastened clamp equipped with a handle, the base of the clamp, the width of which is greater than the thickness of the clamp, and a clamp, while mesh corrugation is applied to the upper surface of the base;

the shape of the groove of the longitudinal guide corresponds to the shape of the lower part of the grip, while a slip gasket is embedded in the groove;

the emphasis contains two sidewalls of the emphasis and the upper beam of the emphasis, which contains two lodgements installed at an angle of 120 ° with a gap between them, and an overlay in the Central part, while the width of the gap is selected from the condition of free movement of the capture;

guide inserts are installed in the inner corners of the sidewalls of the stop, the grooves of the side brackets of the bed go into the grooves of them;

the bed on the front side is closed by a front casing on which the control panel is fixed;

the bed on the back side is closed by a rear casing on which an electronic cabinet is mounted with a control panel, pedal and hydraulic station connected to it;

the control panel contains a start / stop button, a warning lamp, a pressure gauge, an up / down switch and an emergency stop button;

the hydraulic station contains a tank equipped with a drain plug, a hydraulic pump with an electric motor, a pressure gauge displayed on the control panel and connected to a pressure line, which through a check valve, a directional valve with solenoids, a controlled hydraulic lock, the first throttle with a check valve and a divider-adder are connected to the lower cavities hydraulic cylinders, the upper cavity of the hydraulic cylinders using a supply line through a second throttle with a check valve, the control valve and drain filter are connected to the tank, and between the pressure and ivnoy lines included a safety valve;

the mechanical synchronization unit comprises a synchronizing shaft fixed in bearings on the inside of the upper part of the side walls of the bed brackets, at the ends of which the upper sprockets are installed, the lower sprockets are mounted for rotation in the lower part of the side walls of the bed brackets, the chain is spanned in pairs through the upper and lower sprockets connected through tension screws with tension brackets attached from the inside to the bottom of the sidewalls of the stop.

The achievement of the technical result is ensured by the fact that the fixation of the fixed reinforcement on the stop is due to the horizontal movement of the grippers, and the clamping force is created due to the vertical lifting of the stop with the fixed reinforcement using a hydraulic actuator. The synchronization of the hydraulic cylinders is provided hydraulically due to the divider-adder and using mechanical synchronization. The clamping force is adjusted by setting the safety valve.

The utility model is illustrated by drawings, which depict:

in FIG. 1 - device, front view;

in FIG. 2 - device, top view;

in FIG. 3 - device, side view from the left;

in FIG. 4 - device, a longitudinal section along the vertical;

in FIG. 5 - device, horizontal section;

in FIG. 6 - device, a vertical cross section;

in FIG. 7 - control panel;

in FIG. 8-structured hydraulic diagram of a hydroelectric station;

and FIG. 9-11 - explain the operation of the device.

The hydraulic clamping device comprises a frame 1, which contains two side brackets 2 of the frame and the upper beam 3 of the frame.

On the upper surface of the beam 3 of the bed (see Fig. 6) there is a longitudinal guide 4 with a groove 5, in which two grips 6 are inserted, made with the possibility of moving along the guide 4 in the horizontal plane. The gripper 6 contains a rigidly fixed clamp 7, equipped with a handle 8, the base 9 of the clamp and the clamp 10. The shape of the groove 5 of the guide 4 corresponds to the shape of the lower part of the grip. The width of the base of the capture to ensure its stability in the groove is selected in the range from 1.7 to 1.9 thickness of the clamp. The grippers 6 are moved along the guide 4 manually using the handles 8. To facilitate the movement of the grippers 6, a slip gasket 11 is inserted in the groove 5, which can be made, for example, of high molecular weight polyethylene PE 500 (PE HMW R), which has a low coefficient of friction and good resistance to wear and abrasion.

The emphasis 12 contains two sidewalls 13 of the emphasis and the upper beam 14 of the emphasis. The upper surface of the stop beam 14 consists of two lodges 15, mounted at an angle of 120 ° with a gap 16 between them. The width of the gap 16 is selected from the condition of free movement of the grippers 6. In the Central part of the upper beam 14 of the stop mounted plate 17, the length of which is equal to the minimum construction length of the installed reinforcement. The pad 17 gives emphasis rigidity, and also provides alignment of the grips.

The stop 12 is made with the possibility of controlled movement up and down in a vertical plane, using two hydraulic cylinders 18 located on the sides of the device. For this, the cylinders 19 of the hydraulic cylinders 18 are rigidly fixed with the help of flanges 20 in the lower part of the side walls of the frame brackets 2. The rods 21 of the hydraulic cylinders 18 are rigidly fixed at the top of the sidewalls 13 of the emphasis using the flanges 22.

To slip the stop 12 on the frame 1, guide inserts 23 are installed in the inner corners of the sides 13 of the stop, the grooves 24 of which extend the side ribs of the frame brackets 2, which ensures that the rods 21 move the stop 12 relative to the fixed frame 1. The inserts 23 are made of material that It has a low coefficient of friction and good resistance to wear and abrasion, for example, from high molecular weight polyethylene PE 500 (PE HMW R).

The upper and lower cavities of the hydraulic cylinders 18 are connected by the upper 25 and lower 26 tubes with a hydraulic station 27 located inside the frame 1.

The frame 1 on the front side is closed by a front casing 37 on which the panel 28 is fixed. The control panel 28 (see Fig. 8) contains a start / stop button 29, a warning light 30, a pressure gauge 31, an up / down switch 32 and an emergency stop button 33 .

On the back side of the frame 1 is closed by a rear casing 34, on which an electronic cabinet 35 is fixed, inside which electrical elements are placed.

The control panel 28, the pedal 36, and the hydroelectric station 27 are connected to the electronic cabinet 35.

Inside the frame 1 there is a mechanical synchronization unit 38, which comprises a synchronizing shaft 39 fixed in bearings 40 from the inside in the upper part of the side walls of the frame brackets. At the ends of the shaft 40, upper sprockets 37 are mounted rigidly connected to the shaft. In the lower part of the side walls of the brackets 2, the beds are mounted rotatably, for example on the slide bushings, the lower sprockets 41. The chain 42 is connected in pairs through the upper 37 and lower 41 sprockets, connected through the tension screws 43 to the tension brackets 44 attached on the inside to the bottom parts of the sidewalls 13 of the stop.

The movement of the hydraulic cylinders 18 is controlled by a hydraulic station 27, which is located inside the bed 1 and provides a smooth synchronous stroke of the hydraulic cylinders 18 at a constant speed.

The hydroelectric station 27 can be performed according to the scheme of the indications in FIG. 8, and contains a tank 45 equipped with a drain plug 46, a hydraulic pump 47 with an electric motor 48, a pressure gauge 31 connected to a pressure line 49, which through a check valve 50, a valve 51, a water lock 52, a first choke 53 with a check valve and a divider-adder 54 is connected via a connecting line 55 to the lower cavities of the hydraulic cylinders 18. The upper cavities of the hydraulic cylinders 18 are connected to the tank 45 via a second throttle 57 with a check valve, a control valve 51 and a drain filter 58. Between the pressure line 49 and implicit line 59 included a safety valve 60, which provides protection against surge and setting a predetermined pressure in the hydraulic system. The hydraulic pump 47 supplies the working fluid from the tank 45 to the power system of the hydraulic cylinders 18. Switching the direction of movement of the hydraulic cylinders is provided by a hydraulic valve 51, which is controlled by an up / down switch 32 from the control panel 28. Using the pedal 36, a supply voltage is supplied to the solenoid valve selected by the switch 32. The divider-adder 54 provides synchronized operation of the hydraulic cylinders 18 due to the equalization of fluid flows entering the cavity of the hydraulic cylinders.

Additional synchronization of the hydraulic cylinders 18 is carried out using the node 38 mechanical synchronization. During operation of the hydraulic cylinders 18 together with the stop 12, the brackets 44 begin to move, and in the case of mismatched movement of the hydraulic cylinders and the skew sides of the stop 12, the movement of one side 13 of the stop through the elements of the mechanical synchronization unit 38: chain 42, sprockets 37 and 41, shaft 39 is transmitted to the opposite side. Thus, the bracket of the opposite side is driven. In this case, the stroke of the hydraulic cylinders 18 is aligned and the horizontal position of the upper beam 14 of the support 12 is maintained.

The working fluid of the device is mineral oil with minimal foaming, for example, brand VGM3-45.

The hydraulic clamping device operates as follows.

A command to start the device is provided from the control panel 28 by the start / stop button 29. The direction of movement of the stop 12 is set by the switch 32 up / down from the control panel 28. The pedal 36 is installed at a safe working distance from 1 m to 1.5 m from the device. Using the pedal 36, the movement of the stop 12 is controlled depending on the selected operating mode by the switch 32 from the panel 28.

The reinforcement 61 is installed manually or with the help of additional lifting mechanisms on the plate 17, centering it in the middle of the stop 12. Carry out a hydraulic lift of the stop 12 to the level at which the grippers 6 will be directed into the hole 62 of the valve (see Fig. 9). Then the grips using the handles 8 are introduced into the hole 62 of the reinforcement (see Fig. 10). After that, the hydraulic lift of the stop 12 is continued until the reinforcement is fixed, controlling the oil pressure in the hydraulic system by pressure gauge 31.

Fixing of the reinforcement 61 (see Fig. 11) occurs between the clamps 10 of the grippers 6 and the stop 12, while the clamping force is created by the hydraulic cylinders 18 in the vertical direction. To avoid horizontal displacement of the grippers, mesh corrugation is applied to the upper surface of the gripping base 9.

After the armature is securely fixed in the device, release the pedal 36 and turn off the power on the control panel 28. The operator approaches the device and safely carries out assembly or disassembly, visual inspection, repair or maintenance of shut-off and control valves.

The emergency stop button 33 is located on the control panel 28. Its action is to open the electric circuit and, as a result, stop the movement of the rods 21 of the hydraulic cylinders 18. In the absence of voltage, the abutment 12 will not suddenly release, the hydraulic cylinders 18 will stop at the current level due to the action of the hydraulic lock 52.

In accordance with the claimed utility model, a prototype device has been manufactured, which, with dimensions length * width * height (mm) equal to 1170 * 480 * 1040 and a mass of 500 kg, provides clamp-stop valves and other elements with mating flanges in the range from 50 mm to 250 mm with a weight of up to 1000 kg. The achieved clamping force is adjustable in the range from 15 to 60 kN, which provides reliable fastening of various types of shut-off and control valves for assembly or disassembly.

Claims (11)

1. The hydraulic clamping device used to secure the shut-off and control valves, characterized in that it contains a frame, inside which there is a mechanical synchronization unit, on the upper surface of the frame there is a longitudinal guide with a groove in which two grips are inserted, made to move along guide in the horizontal plane, an emphasis made with the possibility of controlled movement up and down in the vertical plane along the bed using two hydraulic cylinders, cat cylinders They are rigidly fixed in the lower part of the side walls of the bed brackets, the rods are rigidly fixed at the top of the sidewalls of the stop, and the upper and lower cavities of the hydraulic cylinders are connected by upper and lower tubes with a hydraulic station that is able to synchronize the operation of the hydraulic cylinders of the stop and adjust the clamping force. 2. The device according to p. 1, characterized in that the bed contains a base, two side brackets of the bed and the upper beam of the bed. 3. The device according to p. 1, characterized in that the gripper contains a rigidly fixed clamp equipped with a handle, the base of the clamp, the width of which is greater than the thickness of the clamp, and a clamp, with mesh corrugation applied to the upper surface of the base. 4. The device according to claim 1, characterized in that the shape of the groove of the longitudinal guide corresponds to the shape of the lower part of the grip, while a slip gasket is embedded in the groove. 5. The device according to p. 1, characterized in that the emphasis contains two sides of the emphasis and the upper beam of the emphasis, which contains two lodgements installed at an angle of 120 ° with a gap between them, and an overlay in the Central part, while the width of the gap is selected from the condition free movement of capture. 6. The device according to claim 1, characterized in that guide inserts are installed in the inner corners of the sidewalls of the stop, the grooves of the side brackets of the bed go into the grooves of them. 7. The device according to claim 1, characterized in that the bed on the front side is closed by a front casing on which the control panel is fixed. 8. The device according to p. 1, characterized in that the bed on the back side is closed by a rear casing, on which is fixed an electronic cabinet with a control panel, pedal and hydraulic station connected to it. 9. The device according to claim 7 or 8, characterized in that the control panel comprises a start / stop button, a signal lamp, an up / down switch and an emergency stop button. 10. The device according to p. 8, characterized in that the hydraulic station contains a tank equipped with a drain plug, a hydraulic pump with an electric motor, a pressure gauge displayed on the control panel and connected to a pressure line, which through a check valve, a valve with solenoids, controlled by a hydraulic lock, the first a throttle with a non-return valve and a divider-combiner are connected to the lower cavities of the hydraulic cylinders, the upper cavities of which are connected via a second throttle with a non-return valve, the hydrodistributor and the drain filter are connected inens with a tank, and a safety valve is connected between the pressure and drain lines. 11. The device according to p. 1, characterized in that the mechanical synchronization unit comprises a synchronizing shaft fixed in bearings on the inside of the upper part of the side walls of the bed brackets, at the ends of which the upper sprockets are installed, and the lower part of the side walls of the bed brackets are installed with the lower sprockets can be rotated, while a chain is connected in pairs through the upper and lower sprockets, connected through tension screws with tension brackets attached from the inside to the lower part b shackle stop.

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