阅读说明：本技术 滑阀和滑阀的用途 (Slide valve and use of a slide valve ) 是由 罗伯特·普茨 马库斯·甘德海特 保罗斯·弗里德黑尔姆 塞巴斯蒂安·布兹加 于 2019-01-18 设计创作，主要内容包括：本申请涉及一种用于化学和/或石化设备的滑阀,特别是圆形、椭圆形或扁平型,具有锁定装置(11)和驱动器,锁定装置可以通过滑杆(12)移动到打开和关闭位置,驱动器具有用于调节滑杆(12)的电动机(13)。锁定装置(11)具有两个锁定板(14、15),在两个锁定板之间设置有楔形构件(16),楔形构件(16)用于将锁定板(14、15)压靠滑阀的阀体密封座(17),楔形构件(16)设置连接到滑杆(12)。驱动器具有主轴驱动器(18),主轴驱动器与滑杆(12)对准并与其连接以传递定位力。(The present application relates to a slide valve for chemical and/or petrochemical plants, in particular of the circular, oval or flat type, having a locking device (11) which can be moved into an open and closed position by means of a slide rod (12), and an actuator having an electric motor (13) for adjusting the slide rod (12). The locking device (11) has two locking plates (14, 15), between which a wedge-shaped member (16) is arranged, the wedge-shaped member (16) being used to press the locking plates (14, 15) against a valve body sealing seat (17) of the slide valve, the wedge-shaped member (16) being arranged to be connected to the slide rod (12). The actuator has a spindle drive (18) aligned with and connected to the slide (12) for transmitting positioning forces.)

1. A slide valve for chemical and/or petrochemical plants, in particular of the circular, oval or flat type, having a locking device (11) which can be moved into an open and closed position by means of a slide rod (12), and having an actuator having an electric motor (13) for adjusting the slide rod (12),

it is characterized in that the preparation method is characterized in that,

the locking device (11) has two locking plates (14, 15), a wedge element (16) is arranged between the two locking plates (14, 15), the wedge element (16) is used for pressing the two locking plates (14, 15) against a valve body sealing seat (17) of the slide valve, the wedge element (16) is connected with the slide rod (12), wherein the driver is provided with a main shaft driver (18) which is aligned with the slide rod (12) and is connected with the slide rod (12) to transmit actuating force.

2. The spool valve of claim 1,

it is characterized in that the preparation method is characterized in that,

the spindle drive (18) comprises a spindle (19) and a spindle nut, wherein a connecting piece (20) connects the spindle (19) with the slide bar (12).

3. The spool valve according to claim 1 or 2,

it is characterized in that the preparation method is characterized in that,

the spindle drive (18) has a circulating spherical element.

4. The spool valve according to claim 1 or 2,

it is characterized in that the preparation method is characterized in that,

the spindle drive (18) has a planetary roller spindle.

5. A spool valve according to any preceding claim,

it is characterized in that the preparation method is characterized in that,

a gear, in particular a worm gear, is arranged between the spindle drive (18) and the electric motor (13).

6. A spool valve according to any preceding claim,

it is characterized in that the preparation method is characterized in that,

the spindle drive (18) and the motor (13) are arranged in an L-shape.

7. A spool valve according to any preceding claim,

it is characterized in that the preparation method is characterized in that,

the electric motor (13) is designed as a brake motor with a mechanical brake.

8. A spool valve according to any preceding claim,

it is characterized in that the preparation method is characterized in that,

the electric motor (13) has a clutch for limiting the torque.

9. A spool valve according to any preceding claim,

it is characterized in that the preparation method is characterized in that,

the electric motor (13) is connected to a frequency converter.

10. Use of a slide valve according to claim 1 as a gate valve in a propane dehydrogenation plant, a PDH plant.

11. Use of a slide valve according to claim 1 as a coking valve in a delayed coking unit.

12. Use of a slide valve according to claim 1 as a pilot-operated double disc valve in the following situations: in the main transfer and decoking lines of an ethylene plant or in a Fluid Catalytic Cracking Unit (FCCU), in particular in the overhead vapor and fractionator bottom lines of a fluid catalytic cracking unit, or in a coal gasification plant, or in a visbreaker plant, or in an epichlorohydrin plant.

13. Use of a slide valve according to claim 1 as a gate valve in the following situations: in an Isosiv/TIP plant based on the UOP process, or in a cycle power plant, or in an ethylene plant, or in a fluid catalytic cracking plant, or in a coal gasification plant, or in an cupola plant, or in a zinc furnace, or in a waste heat boiler.

Technical Field

The present invention relates to a slide valve for a chemical and/or petrochemical plant according to claim 1. Such a slide valve is known, for example, from D102011001186a 1.

Background

In the chemical and petrochemical industries, slide valves are used for controlling gas and solids flow. The spool valve has a locking device slidably mounted in the housing and opening or closing a valve opening in the housing by a reciprocating motion (Hubbewegung). Such valves are intended to provide long maintenance free run times at high operating temperatures, large nominal diameters and high switching frequencies.

A well known slide valve is a coker slide valve whose slide rods are connected to a dual spindle drive through a yoke. The dual spindle drive can transmit a large driving force to the slide bar. However, special measures must be taken to advance the two twin spindles in unison.

Disclosure of Invention

The object of the present invention is to provide a slide valve for chemical and/or petrochemical plants which makes the slide rod simple to operate and requires as little maintenance as possible. The invention also aims to provide the application of the slide valve.

According to the invention, this object is achieved by a slide valve having the features of claim 1.

In particular, this object is achieved by a slide valve for chemical and/or petrochemical plants, in particular of circular, oval or flat design, having a locking device which can be moved into an open and closed position by means of a slide rod. The slide valve also has a drive with a motor for adjusting the slide rod. The locking device has two locking plates, between which a wedge-shaped member is arranged for pressing the locking plates against a valve body sealing seat of the slide valve. The wedge member is connected to the slide bar. The actuator has a spindle driver aligned with and coupled to the slide bar to transmit an actuation force.

The invention has the advantage of not requiring hydraulic oil. This also eliminates the need for on-site plumbing (feldverrohung) for hydraulic actuation, eliminates the risk of leaks, and eliminates the need for line flushing and more intensive system maintenance. Meanwhile, the slide valve is firm in design and suitable for being used under severe conditions.

The spindle drive has the advantage of a high feed speed and a precise actuation movement to achieve the reciprocating movement of the locking plate. In the closed position, the wedge member separates the locking plate, thereby pressing the locking plate against the valve body seal seat of the spool valve. This creates a reliable seal during operation of the spool valve. To open the slide valve, the wedge member is released and the expansion is removed to reduce the contact pressure. This reduces wear on the locking plate when opening the slide valve.

The connection of the spindle drive to the wedge-shaped element via the slide has the following advantages: the contact pressure of the locking plate against the valve body seal seat, which is generated by the wedge-shaped member, can be accurately adjusted. Advantageously, the interaction of the electric drive with the spindle drive serves to transmit the drive torque electromechanically to the slide rod.

Preferred embodiments of the invention are indicated in the dependent claims.

Thus, the spindle drive may have a spindle and a spindle nut. In this embodiment, the spindle moves translationally but not rotationally. The conversion of the rotational movement of the motor into a translational movement of the spindle is done by means of a spindle nut. The spindle nut is fixed in the direction of translation.

Preferably, the connecting member connects the main shaft and the slide bar. The connecting element can be designed as a crosshead, for example. Other connections are possible. The connecting piece allows a simple connection between the main shaft and the slide bar. The connection may be detachable for ease of maintenance.

Preferably, the spindle drive has a recirculating ball bearing element. The recirculating ball element may be designed as a recirculating ball nut (kugelumlauffmutter). This allows a large advance with a high precision of the actuation movement.

Alternatively, the spindle drive may have a planetary roller spindle (planetenwalzensipendel). This also ensures accurate advancement. The drive is substantially backlash free.

A gear, in particular a worm gear, may be arranged between the spindle drive and the motor. This provides for the transmission of drive torque or drive speed. The worm gear has the advantages of self-locking and loading.

In order to optimize the installation space, the spindle driver and the motor may be provided in an L-shape. Other positions of the motor are possible.

If the electric motor is designed as a brake motor with a mechanical brake, the safety can be improved and accidental adjustment of the locking device can be prevented.

As an alternative or in addition to the brake motor, the motor may have a clutch for limiting the torque. The safety is also increased here, preventing accidental adjustment of the locking device. If the motor is connected to an inverter, the rotational speed of the motor can be variably adjusted.

Within the scope of the present invention, the use of the slide valve according to claim 1 of the present invention as a gate valve in a propane dehydrogenation plant (PDH plant) is claimed.

Typically, olefins and hydrogen are produced by dehydrogenation of hydrocarbons and regeneration of oxidation catalysts. Light olefins (ethylene, propylene, butylene) are important industrial feedstocks and have been widely used in the production of polymers, paints, coatings and other chemicals. These olefins are obtained by steam Cracking of light crude oil (naphtha) or Fluidized Catalytic Cracking (FCC) of heavy oil. An alternative to steam cracking and FCC processes is the dehydrogenation of hydrocarbons such as propane and butane. These are non-oxidative and oxidative processes using catalysts.

The process is another example of propane dehydrogenation for the production of propylene.

Dehydrogenation processThe process is a catalytic technique which, due to its thermodynamic working characteristics, ensures a very high conversion of paraffins into olefins. In this process, isobutene, n-butene or propene is produced from isobutane, n-butane or propane, respectively.

In this case, the slide valve of Z & J ensures cyclic isolation of the catalytic process and the various process media of the required regeneration phases. The positive wedging wedge mechanism in combination with the two slides independent of each other ensures the highest required tightness and durability of the joints used in this demanding catalytic process.

In this context of the invention, the use of a slide valve according to claim 1 as a coking valve in a delayed coking unit is also disclosed and claimed. Furthermore, the use of a slide valve according to claim 1 as a two-disk valve of the conduit type is claimed in the following cases: in the main feed and decoking lines of an ethylene plant or in a Fluid Catalytic Cracking Unit (FCCU), in particular in the overhead vapor and fractionator bottom lines of a fluid catalytic Cracking Unit, or in a coal gasification plant, or in a visbreaker plant, or in an epichlorohydrin plant. Further, the use of a slide valve according to claim 1 as a gate valve in the following situations is claimed: in a UOP process based Isosiv/TIP plant, or a cycle power plant, or an ethylene plant, or a Fluid Catalytic Cracking Unit (FCCU), or a coal gasification plant, or a cupola plant, or in a zinc furnace, or a waste heat boiler.

Drawings

The invention is explained in more detail below by way of examples and with reference to the accompanying single schematic drawings.

The only figure of the application is a perspective view showing the drive with the motor, which is connected to the gate valve (partly in section).

Detailed Description

The slide valve 10 is designed for a PDH plant, in particular for operating according to the isopentane dehydrogenation (Houdry) processGate valve of equipment. The slide valve has a locking device 11, which locking device 11 is arranged between two pipe connections 21, 22 in the closed position of the slide valve 10 shown, and closes these pipe connections or the pipes connected to the pipe connections 21, 22 in the installed state. For actuating the locking device 11, which locking device 11 is connected with a slide rod 12, the slide rod 12 can be moved in the axial direction together with the locking device 11. In the open position (not shown here), the locking device 11 is removed from the pipe, so that the pipe is clear.

The locking device 11 comprises two concentrically arranged locking plates 14, 15. Between the two locking plates 14, 15 a wedge-shaped member 16 is arranged. The wedge member 16 has two wedges with a ball centrally located between the wedges. When closed, the two wedges contact and slide on corresponding inclined mating surfaces on the inside of the locking plates 14, 15. This converts the closing force of the slide rod 12 in the axial direction into a sealing force perpendicular to the two locking plates 14, 15. In the closed position, the two locking plates 14, 15 are diverged by a wedge-shaped member 16, being pressed against a valve body seal seat 17. To open, the wedge-shaped member 16 is pulled back from the mating surface, thereby reducing the diverging effect. Thereby, the lock plates 14, 15 can be moved to the valve body seal seat 17 side with a low contact pressure, thereby reducing wear.

As shown in the drawings, the slide bar 12 is connected to a wedge member 16. The slide rod 12 can thus transmit the adjustment force required for the reciprocating movement of the locking device 11 and the contact pressure of the two locking plates 14, 15 against the valve body sealing seat 17.

The slide bar 12 is connected to a motor 13 of a drive for adjusting the slide bar 12. The driver has a spindle driver 18, the spindle driver 18 being aligned with the slide bar 12 as shown. That is, the slide bar 12 is assigned a single spindle drive 18, which spindle drive 18 is in line with the slide bar 12 for transmitting a linear force in the direction of translation.

The spindle drive 18 is mechanically connected on the one hand to the slide bar 12 and on the other hand to the motor 13, so that the drive torque generated by the motor 13 is transmitted to the slide bar 12 via the spindle drive 18. The rotational direction of the motor 13 is changed to move the locking device 11 to the open position or the closed position.

The spindle drive 18 has a spindle nut (not shown) and a spindle 19, the spindle 19 being connected to the spindle shaft 12. For example, as shown, the connection may be made through a connector 20. The spindle nut is fixed in the translational direction of the spindle drive 18, transmitting the drive torque of the electric motor to the spindle 19 by a rotational movement. Thus, the rotational movement is converted into a translational movement of the spindle 19. The spindle nut can be designed, for example, as a recirculating ball nut. Alternatively, the spindle drive 18 may be provided as a planetary roller spindle. In the embodiment shown, a gear is provided between the motor 13 and the spindle drive 18. The gear may be a worm gear, for example. Other gear types are also possible. The motor 13 and the spindle driver 18 are arranged in an L-shape. The L-shape can be realized, for example, by a worm gear.

The electric motor is designed as a brake motor with a mechanical brake. Furthermore, the electric motor 13 has a manual emergency operation. The spindle drive 18 is equipped with a position indicator and a corresponding sensor for determining a position signal of the spindle drive 18.

An advantage of an electromechanically actuated slide valve is that, in contrast to conventional slide valves, no hydraulic oil is required. This also eliminates the risk of leakage and eliminates field piping. In some climatic regions there is no need to heat the field pipes. The hydraulic lines need not be flushed. The gate valve is characterized by a robust and stable design and low maintenance costs.

Reference numerals

10 slide valve

11 locking device

12 sliding rod

13 electric motor

14 first locking plate

15 second locking plate

16 wedge-shaped member

17 valve body seal seat

18 spindle drive

19 spindle

20 connecting piece