CN216478164U

CN216478164U - External member

Info

Publication number: CN216478164U
Application number: CN201990001268.3U
Authority: CN
Inventors: 纳尔西索·洛里斯·莫利纳罗
Original assignee: 4mc Co
Current assignee: 4mc Co
Priority date: 2019-01-04
Filing date: 2019-01-04
Publication date: 2022-05-10
Anticipated expiration: 2029-01-04
Also published as: ES1275815U; FR3091564B1; WO2020141265A1; ES1275815Y; FR3091564A1; DE212019000439U1

Abstract

A kit for actuating an operating element of a component, such as a valve to be closed and opened, is achieved by a cylinder (22) including a piston adapted to be moved in a chamber (27) of the cylinder by hydraulic oil. A power unit (2) includes a hydraulic pump (18) for pumping hydraulic oil, an electric motor (41) for driving the hydraulic pump, and at least one hydraulic oil conduit (30) connecting the hydraulic pump and the cylinder chamber.

Description

External member

Technical Field

The utility model relates to a power unit for driving an operating element of a machine member (for example, a valve plug for opening and closing a valve) by means of a hydraulic cylinder with a piston which can be displaced in a cylinder chamber by the action of a fluid.

It also relates to a set of kits comprising:

-a power unit for supplying power to the power unit,

a valve comprising a valve plug, and

a movable shaft (rotating or translating) connected to the plug (also called shutter).

Background

The power unit involved in the utility model can be used to replace known pneumatic or hydraulic cylinders.

The valve drive can generally be operated in the following manner:

1) the pneumatic mode is as follows: one or more cylinders are supplied with a compressed air source, the cylinders ensuring the opening or closing movement of the valves by means of a mechanism.

The disadvantages are the need to pay attention to the size and the risks posed by the pressurized housing;

2) the hydraulic mode is as follows: the electrical energy is supplied using a centralized external power source or a separate hydraulic system. The disadvantage of this approach is that for independent hydraulic systems there is currently no compact system, since such systems are rather complex and expensive to manufacture;

3) electrical method: the motor ensures the rotation of the valve plug of the valve through a set of gears. The disadvantages are as follows: this solution is only suitable for low-power parts, is slow and irreversible, that is to say it cannot be used for valves with safety functions;

4) many valves with a translation axis are difficult to control or adjust accurately.

SUMMERY OF THE UTILITY MODEL

In order to provide a solution to the above-mentioned disadvantages, it is proposed that:

the fluid in the cylinder chamber should be hydraulic fluid, and

-said power unit further comprising:

-a hydraulic pump for pumping said hydraulic fluid,

-a motor for driving the hydraulic pump, and,

-at least one hydraulic fluid conduit communicating the hydraulic pump with the cylinder chamber.

In order to improve efficiency and compactness, it is proposed that the power unit further comprises a housing for protecting:

-a hydraulic cylinder chamber, which is provided with a hydraulic cylinder chamber,

-a hydraulic fluid which is supplied to the hydraulic pump,

a hydraulic pump adapted to be pumped within the housing,

-an electric motor to be adapted to operate submerged in a hydraulic fluid in a housing, and

-said (at least one) hydraulic fluid conduit.

Also in order to improve the efficiency and performance of the power unit, it is proposed that the power unit preferably includes a distribution module in the housing for controlling the supply of hydraulic fluid in the cylinder chamber.

Also for increasing efficiency and compactness it is suggested to place the distribution module between the hydraulic pump and the electric motor, and the drive shaft of the electric motor should pass through the module.

For safety, it is also proposed:

one end of the motor drive shaft protrudes out of the housing and is shaped such that it can be driven by a drill bit of a hand drill or a hand screwdriver, and/or

The power unit described above is in particular as follows:

the hydraulic cylinder should be a single-acting hydraulic cylinder,

the power unit also comprises a hydraulic accumulator which is hydraulically connected to part of the cylinder chamber for safety reasons, so that hydraulic fluid can act on one side of the piston.

For the same purpose, it is proposed that the power unit also comprises a pilot valve at the outlet of the hydraulic accumulator for controlling the hydraulic fluid delivered to the hydraulic cylinder chambers of the gate.

In order to ensure compactness while at the same time effectively actuating the valve plug of the valve, it is also proposed that the piston is mechanically connected, outside the cylinder chamber and the housing, to a support of a rack which is in meshing connection with a rotary gear wheel connected to the valve, the support thus forming the above-mentioned operating element.

As an alternative, it is conceivable to leave said mechanical connection of the piston always outside the cylinder chamber and the housing, but instead of establishing it by means of the rack support, it is established by means of said translation shaft forming the operating element.

As mentioned above, a linearly moving gate valve will show a higher performance.

For similar purposes it has also been proposed that the piston projects outside the cylinder chamber and the housing a rod which will come into contact with the hydraulic fluid through the housing wall, against which the cylinder chamber abuts.

For manufacturing, maintenance and compactness considerations, the interior of the housing of the power unit may include:

-a tubular body, the bottom side wall of which closes the end, the body being a reservoir for hydraulic fluid inside the casing,

and a plurality of fastening rods passing through said hydraulic fluid storage tank for supporting the bottom side wall of the tubular body.

With regard to the above-mentioned kit (comprising a power unit, a gate valve and a shaft connected to the valve plug), it is proposed to additionally comprise:

-in the case of a rotating shaft, a control box fixed to the casing containing the rack, its support and the rotating gear, in the case of a translating shaft, a control box fixed to the valve body, and

-electrical connections between the control box and the hydraulic pump and between the control box and the electric motor.

Thus, the goal of compactness is reached.

Drawings

FIG. 1 shows a valve control assembly according to the utility model, according to the bottom view, with a split part, and a coupling with elastic return means;

FIG. 2 shows a side view of the same assembly;

FIG. 3 shows the control portion of the shutter, in vertical section, in plane P of FIG. 1;

FIG. 4 shows the right part of FIG. 3, completing a hydraulic safety accumulator with a pilot valve;

figure 5 represents a perspective view of the control assembly of the blind according to the utility model, but with only one actuator and power unit, without elastic return means; and

figure 6 shows an alternative embodiment with sliding blinds.

Detailed Description

Accordingly, one aspect of the present invention is directed to an assembly 1, as shown in FIGS. 1-3.

A power plant 2, in an embodiment adapted to the utility model, described in detail below

A valve 20 comprising a shutter 3.

A rotating shaft 13 connected thereto and driven in rotation by a rotating toothed pinion 11.

In this embodiment, the valve 20 is operated by a rack 9 which meshes with a toothed rotary pinion 11.

The pinion 11 in the figure has an oval cross-section.

In a related solution, the teeth 110 of the pinion 11 are therefore positioned along several different radii. These radii determine the minimum and maximum torque available.

The rack 9 extends substantially transversely to the axis of rotation 11a of the pinion 11, substantially along a direction 191 along which the involute of at least a portion of the original perimeter of the pinion extends (at the location of the peripheral teeth 110; fig. 1).

The pinions 11 are also connected to a shaft 13 so that one transfers torque to the other. In practice, this torque will be proportional to the torque exerted by the rack 9 on the pinion 11, the rack 9 itself being driven in translation by an actuator 5.

The rotary shaft 13 is fixedly connected to the blind 3 to be operated (see fig. 2).

A transmission 5 with a transmission rod 50a (block labelled 5/2) is arranged in axial extension (axis 191) of one of the two opposite ends of the support 15 of the frame 9. On the opposite side, nothing can be present, as shown in fig. 5, or another casing 310, constrained by a tubular body 370, and containing a means 311 for elastic return along the axis 191, as shown in fig. 1. The elastic return means 311, which may be a compression spring, may act on a piston 313 with the driving rod 50b inside the housing 310.

Note that

rods

50a, 50b extend along axis 191 to one and/or the other lateral extension of frame 15.

The mechanism part, consisting of the rack 9, the pinion 11, the shaft or sleeve 13 and the rack support 15, can be housed in a housing 23 consisting of two

parts

23a, 23b, forming two complementary half-shells. Laterally, the openings, 25a, 25b in fig. 2, allow the passage of the

relative rods

50a, 50 b.

Fig. 5 shows that the assembly 1 may effectively further comprise.

A control box 14 (one of the two

parts

23a, 23 b) fixed to the casing 23, which therefore closes a volume 24 (fig. 1) containing the rack 9, its rack 15 and the pinion 11.

And an electrical connection 12.

Control box 14 on the one hand and control box 14 on the other hand

On the other hand, the power unit 2, in particular the hydraulic pump 17 and the electric motor 18 comprised by the power unit 2.

Fig. 3-4 show in detail the contents of a power block 2, according to an embodiment of an aspect of the present invention.

We therefore see a power block 2 for actuating (at least) one element 50a to operate a component 3, for example in which case the blunt of a valve 20 is closed and opened, by means of a jack 22, comprising a piston 26, adapted to move in a chamber 27 of the jack under the action of hydraulic fluid.

The power unit 2 further includes:

a hydraulic pump 17 for pumping hydraulic oil;

an electric motor 18 drives the hydraulic pump 17; and

at least one

conduit

30 or 40 for hydraulic oil, which connects the hydraulic pump 17 to the cylinder chamber 27.

It is worth mentioning that the power plant 2 further comprises a housing 31 containing … ….

A cylinder chamber 27.

A hydraulic pump 17 adapted to pump hydraulic oil in the housing 31.

An electric motor 18, therefore suitable for submerged operation in the hydraulic oil, and also

The above-mentioned

conduit

30 or 40.

In order to act on the support 15 of the frame 9, the (each) piston is outside the chamber 27 of the cylinder and the housing 31, and in the preferred embodiment shown in figure 3 there is a

rod

50a or 50b which passes through the wall of the housing 31, in contact with the hydraulic oil, on which the chamber 27 is located. Thus, the free end of the

rod

50a or 50b is outside the housing 31, mechanically connected to the support 15 (hole/pin connection in the example).

In the housing, a distribution block 32 allows to manage the supply of hydraulic oil to the chamber 27 of the jack. Thus, various functions of flow and pressure management of the cylinder supply circuit are controlled.

Such a distribution block 32, if present, would be interposed between the hydraulic pump 17 and the electric motor 18. Ergonomics, efficiency and compactness will be optimized.

The dispenser block 32 is penetrated by a shaft 180 for driving the electric motor 18.

In order to enable the valve deactivator 3 to be operated in the absence of electrical power, one end 180a of the drive shaft 180 may extend out of the housing 31 and have a shape 29 that allows it to be driven by a drill bit 34 of a drill bit or manual screwdriver (not shown).

Additionally, particularly for safety reasons, if the cylinder 22 is single acting, the power block 2 may effectively further include a hydraulic accumulator 33 (fig. 4) hydraulically connected to a portion (one side) 27a of the cylinder chamber 27.

Therefore, the hydraulic oil in the hydraulic accumulator 33 can act on one side of the piston 26.

Advantageously, a pilot valve 35 may be provided in connection with the outlet 33a of the hydraulic accumulator 33, which pilot valve serves to pilot the hydraulic oil that the hydraulic accumulator 33 may deliver to said portion 27a of the cylinder chamber.

If the jack 22 is single-acting, the rod 50a coming out of the casing 31 under the action of the power block 2 can be pushed back at the other end along the axis 191 by the elastic return means 311, through the coaxial rod 50b fixed to the support 15, and also through the piston 313.

In order to make the frame of the power block, it is effectively preferable that, as shown in fig. 3, the housing 31 includes.

A tubular body 37 defining, inside the casing 31, a volume V for storing hydraulic oil, together with

bottom side walls

39,41 or flanges closing the axially opposite ends thereof.

And an axial tie 43 passing through the volume V for fixing the

side walls

39,41 with respect to the body 37.

The nut ensures blocking and sealing from the outside of the housing 31 by means of a sealing ring.

The hydraulic oil may be oil. The fill and drain

ports

44, 45, respectively, allow sufficient liquid in the frame of the power block.

The cylinder 22 in question, acting on the axis 191 of the rod 50a, will therefore advantageously be integrated and integrated with one of the side walls 39,41 (here 39).

In the housing 31, the cylindrical body 47 of the jack 22 can be closed by a bottom 49, axially opposite the side wall 39 through which the rod 50a passes; fig. 3.

The bottom 49 is fixed axially to the wall 39 by means of a tie rod 51.

Hydraulic oil can be supplied on the stem 50a through an orifice made in the wall 39, and on the bottom 49 through an orifice in the bottom.

The compact assembly comprising the axially stepped electric motor 18, the distributor block 32 and then the hydraulic pump 17, all adapted to operate in oil, is fixed to the bottom/side wall 41 and is connected to the cylinder 22 by flexible pipes or

hoses

30,40, which makes it possible to supply the two

sides

27a, 27b of the chamber, since the cylinder is bidirectional in the example.

The motor 18 can provide different voltages (380V 220V three-phase, 220V 110V single-phase or 48V/24V DC) as required.

The control box 14 may effectively comprise a sealed housing with a base directly fixed to a portion 23a of the mechanism housing 23.

From the inside, one shaft transmits (laterally returns) the movement (in this case rotation) of the lever 50a and/or 50b of the end-of-stroke mechanism of the shutter shaft 3, as well as an indicator 53 of the position of the pinion 11 visible from the outside of the box 14.

Connected to the control box 14 are an input cable 55, a cable 12 for supplying the motor 18/distribution block 32/hydraulic pump 17 assembly, and a control cable 59; fig. 5.

With block 5/2, it is possible to obtain a frame without distinct mechanical elements outside the frame.

In the embodiment shown in fig. 6, the above-mentioned axis of rotation is replaced by a shaft 13 which is movable in translation (shaft 191) and is placed under the control of a rod 50a coaxial therewith. 5/2 the interior of the block is like that of fig. 3. The rod 50a is controlled by the power block 2, which acts on the cylinder 22. When the piston 16 moves, it drives the rod 50a to move axially, thus, in the figure, causing the shutter 3 to move upwards or downwards (see arrows). Communication between the

internal conduit portions

61a, 61b of the valve is, on either side of the blunt 3, opened (blunt 3 in the high position) or closed (blunt in the low position) accordingly. The

axial tie rods

63a, 63b secure the body 21 and the body 37 of the valve 20 together. A guide 65 fixes the axial translation.

Among the advantages of the present invention, one can note.

a) Compact assembly: the power block has no external elements (tubes, relay gears, tie rods, etc.).

b) The multifunctional: the power device has multiple functions. It can be used for double-acting, single-acting functions, with a return spring cassette or hydraulic accumulator … …, etc.

c) Integrated manual control: the power pack may be manually operated if desired.

d) Maintenance-free and adjustment: the power pack is factory set to the required hydraulic pressure according to the torque applied to the driven valve 3. This arrangement is just below the requirements for valve operation, as it protects the valve, and in particular the output shaft 13, from overload.

e) The service life is long: the service life of the hydraulic system is long. These components are soaked in hydraulic oil. They are not affected by external mechanical or chemical attacks, which makes it an extremely reliable product.

f) A control box: the electric cabinet can integrate the management motor 18 and, if necessary, two limit switches with contacts.

g) Protection of the motor 18: the protection is carried out on the conditions of voltage faults, phase faults, overcurrent and abnormal temperature rise.

h) Power supply (

cable

12, 55, 59): standard 200V/400V three-phase power supply. A single ac or dc version is possible.

i) Low energy consumption: the elliptical pinion 11 will optimize the torque acting on the valve 3 just below the torque requirement; moreover, the efficiency of the electrohydraulic assembly is very high, which means that the overall energy consumption is minimized.

Claims

1. A kit, characterized in that the kit comprises:

-a valve comprising a valve plug (3),

-a power unit for actuating the opening and closing operating member (13) of the valve plug by means of a hydraulic cylinder (22) with a piston (26) which is movable in a cylinder chamber (27) under the influence of hydraulic fluid,

-a hydraulic pump (17) for pumping said hydraulic fluid,

-an electric motor (18) for driving the hydraulic pump, and,

-at least one hydraulic fluid conduit (30,40) communicating the hydraulic pump with the cylinder chamber,

-a housing (31) containing:

-a hydraulic cylinder chamber (27),

-a hydraulic fluid having a pressure-sensitive adhesive,

-a hydraulic pump (17) adapted to pump in a housing (31),

-an electric motor (18) adapted to operate immersed in a hydraulic fluid inside the casing, and

-said at least one hydraulic fluid conduit, and one of:

-either a support (15) for the rack (9), a rotary gear (11) and a rotary shaft (13) connected to the valve plug (3) and driven in rotation by the rotary gear (11); a piston (26) which is mechanically connected outside the cylinder chamber (27) and the housing (31) to a support (15) for a rack which is in meshing connection with a rotary gear (11) and the support for the rack (9) forms the operating element; the kit also comprises a control box (14) fixed to the casing (23), the interior (24) of which contains the rack (9), its support (15) and the rotary gear (11); there are electrical connections (12) between the control box (14) and the hydraulic pump, and between the control box and the motor (17)

-either a translation shaft (13) associated with the valve plug (3), which translation shaft (13) is driven by the piston (26) and forms said operating element; a piston (26) which establishes a mechanical connection with the translation shaft (13) outside the cylinder chamber (27) and the housing (31); the kit also comprises a control box (14) fixed to the body (21) of the valve (20); electrical connections (12) between the control box (14) and the hydraulic pump, and between the control box and the motor (17).

2. A kit according to claim 1, characterized in that it further comprises a distribution module (32) in the housing for controlling the hydraulic fluid supply in the cylinder chamber (27).

3. The kit according to claim 2, characterized in that the dispensing module (32) is placed between the hydraulic pump and the electric motor (18) and the drive shaft (180) of the electric motor should pass through the module.

4. Kit according to any of claims 1 to 3, characterized in that one end (180a) of the drive shaft of the motor (18) protrudes from the housing (31) and is shaped so as to be drivable by a drill bit (34) of a hand drill or screwdriver.

5. The kit of claim 1, wherein:

-the hydraulic cylinder (22) is single-acting,

-the power unit (16) further comprises a hydraulic accumulator (33) which, for safety reasons, is hydraulically connected to part of the cylinder chamber (27) in order to apply hydraulic fluid on one side of the piston (26).

6. A kit according to claim 1, further comprising a pilot valve (35) at the outlet of the hydraulic accumulator (33) for directing hydraulic fluid to said part of the cylinder chamber.

7. A set according to claim 1 or 5, characterised in that the piston projects outside the cylinder chamber and the housing (31) with a rod (50a) for mechanical connection which will pass through the wall (39) of the housing (31) to be in contact with the hydraulic fluid, the cylinder chamber (27) being adjacent to the housing wall.

8. The kit according to claim 1, wherein the housing (31) comprises:

-a tubular body (37) closed at the ends by bottom side walls (39,41) which acts as a storage chamber for the hydraulic fluid inside the casing (31),

-further comprising a plurality of fastening rods (51) passing through the aforesaid hydraulic fluid storage tank for supporting the bottom side wall of the tubular body (37).