CN117927691A - Sealing isolation door and thermal power generation equipment - Google Patents

Abstract

The invention discloses a sealed isolation door and thermal power generation equipment. The sealing isolation door can seal at least the end of the first pipeline, and comprises a gate, a driving device and a bracket. The two opposite side surfaces of the gate are a first surface and a second surface respectively. The second surface is for closing the first conduit in a sealed position and at least partially opening the first conduit in an open position. The driving device is arranged on the bracket and connected with the gate to drive the gate to move between a sealing position and an opening position. The seal isolation door further includes a compression assembly. The compressing assembly comprises a first compressing piece fixed on the first surface and a second compressing piece fixed on the bracket. The first compression member and the second compression member each have a compression profile. In the process of moving the gate from the opening position to the sealing position, the first pressing piece is contacted with the second pressing piece through the pressing molded surface, and gradually increasing pressing force is generated between the first pressing piece and the second pressing piece, so that the second surface is pressed on the port of the first pipeline through the pressing force.

Description

Sealing isolation door and thermal power generation equipment

Technical Field

The invention relates to the technical field of sealing devices, in particular to a sealing isolation door and thermal power generation equipment.

Background

The gate seal generally includes a bracket, a gate, and a drive assembly. Two mutually parallel sliding rails are arranged on the support, the gate is arranged in a gap between the two sliding rails in a sliding mode, and the driving assembly is used for driving the gate to slide along the gap. In order to ensure smooth sliding, the gap width should be greater than the gate thickness. In the field of special requirements for tightness, one or both sides of the gate need to be provided with a sealing member (e.g., packing) for sliding contact with the gate when the gate slides. However, when a large pressure difference exists on two sides of the gate, the gate is separated from the sliding rail and the sealing element on the high pressure side in the process of moving to the low pressure side in the gap under the pushing of the fluid on the high pressure side, so that the high pressure fluid is leaked. Particularly, after the thickness of the sealing element is reduced due to high temperature, high pressure, aging and other factors, and under the condition that the environment is subjected to larger vibration, the leakage phenomenon is more obvious.

For example, in thermal power generation processes, it is often necessary to feed coal to a coal mill, which grinds the coal into pulverized coal, and then to inject the pulverized coal into the combustion chamber of a coal combustion furnace along with air preheated by a preheater. Therefore, the air in the coal mill is hot air with high temperature and is accompanied by a certain pressure. The feed bin of feeder passes through hot-blast line connection coal pulverizer, and the hot-blast line is provided with the coal gate in general. Two sides of the coal gate are respectively provided with a packing, and the coal gate is sealed by sliding contact with the packing. When the coal mill needs to be added with coal, the coal gate can be opened to enable the coal to fall from the storage bin to the combustion chamber. When the coal mill does not need to be added with coal, the coal gate can be closed to block the conveying of the coal. The coal gate is used for isolating coal materials and also used for isolating hot air. When the coal feeder is overhauled, the coal gate needs to isolate hot air, so that the hot air generated by the preheater is prevented from flowing into the coal feeder to injure overhaulers. In the prior art, a limiting structure is usually arranged on the low-pressure side of the gate, and can only limit the position of the gate after the gate moves, and cannot apply pre-pressure for preventing the gate from moving.

Disclosure of Invention

The invention aims to provide a sealing isolation door and thermal power generation equipment, which are used for solving the problems in the prior art, and improving the sealing effect on a high-pressure side under the condition that pressure difference exists on two sides of a gate.

In order to achieve the above object, the present invention provides the following solutions:

The invention discloses a sealing isolation door which can seal at least the end part of a first pipeline and comprises a gate, a driving device and a bracket; the surfaces of two opposite sides of the gate are respectively a first surface and a second surface; the second surface is used for sealing the first pipeline in a sealing position and at least partially opening the first pipeline in an opening position; the driving device is arranged on the bracket and connected with the gate so as to drive the gate to move between the sealing position and the opening position;

The sealing isolation door further comprises a compression assembly;

The pressing assembly comprises a first pressing piece fixed on the first surface and a second pressing piece fixed on the bracket; the first pressing piece and the second pressing piece are provided with a pressing molded surface; in the process that the gate moves from the opening position to the sealing position, the first pressing piece and the second pressing piece are contacted through the pressing molded surface, and gradually increasing pressing force is generated between the first pressing piece and the second pressing piece, so that the second surface is pressed on the port of the first pipeline through the pressing force.

Preferably, the first pressing member is in sliding contact with the second pressing member.

Preferably, the driving device is a hydraulic cylinder, the hydraulic cylinder is connected with the gate through a piston rod, the gate moves to the sealing position when the rod cavity of the hydraulic cylinder is filled with liquid, and the gate moves to the opening position when the rod cavity of the hydraulic cylinder is filled with liquid.

Preferably, one of the pressing profiles is an inclined plane, the inclined plane being disposed obliquely with respect to the second surface; the other pressing profile is a curved surface.

Preferably, both of the pressing profiles are inclined planes, the inclined planes being disposed obliquely with respect to the second surface; the inclination angles of the two inclined planes are the same.

Preferably, both said pressing profiles are curved.

Preferably, one of the pressing profiles is a rolling surface of a circular rolling member, and the other pressing profile is an inclined plane or curved surface.

Preferably, one of the pressing profiles is a rolling surface of a round rolling element, and the other pressing profile is a combination of a parallel plane and an inclined plane; the parallel plane is parallel to the second surface, and the inclined plane is inclined relative to the second surface;

the circular rolling parts can elastically deform, so that when the gate moves to the sealing position, the circular rolling parts sequentially pass through the inclined plane and the parallel plane, so that the pressing force between the first pressing part and the second pressing part is gradually increased and then kept unchanged.

Preferably, the circular rolling element can elastically shift, so that when the gate moves towards the sealing position, the circular rolling element sequentially passes through the inclined plane and the parallel plane, so that the pressing force between the first pressing element and the second pressing element is gradually increased and then is maintained unchanged.

Preferably, the sealing isolation door further comprises the first duct;

The first conduit includes a first tubular body, a first mounting assembly, and a first seal; the first tubular body being mounted to the bracket, the first tubular body having a first tube end facing the second surface, the first mounting assembly mounting the first seal to the first tube end; the first seal is annular for sealing a gap between the first tube end and the second surface of the gate in the sealing position.

Preferably, the first sealing element is sleeved outside the first pipe end, the first installation component is a first hoop, and the first hoop enables the first sealing element to be in close contact with the first tubular body.

Preferably, the sealing isolation door further comprises a first adjusting assembly mounted on the bracket and located on a side of the first sealing element facing away from the gate; the first adjustment assembly is for urging the first seal toward the gate.

Preferably, the first adjustment assembly comprises a first annular member and a first pusher member; the first annular piece is used for contacting one side of the first sealing piece, which faces away from the gate, so that all parts of the first sealing piece move synchronously towards the gate; the first pushing member is configured to push the first ring member toward the shutter.

Preferably, the first pushing member is a threaded member having external threads, and the first pushing member is directly or indirectly mounted on the bracket.

Preferably, the hermetic isolation door further comprises a second conduit;

The second conduit includes a second tubular body, a second mounting assembly, and a second seal; the second tubular body being mounted to the bracket, the second tubular body having a second tube end facing the first surface; the second mounting assembly mounts the second seal to the second tube end, the second seal being annular for sealing a gap between the second tube end and the first surface of the gate in the sealing position.

Preferably, the bracket is box-shaped and comprises a pair of box side covers, a pair of box end covers and a pair of box face covers;

the gate is positioned on the inner side of the bracket; the driving end of the driving device penetrates through one of the box body end covers and is connected with the gate; the second pressing piece is arranged on the side cover of the box body; the first tubular body passes through one box body face cover, the second tubular body passes through the other box body face cover, and the first sealing piece and the second sealing piece are both positioned between the two box body face covers.

Preferably, the box body end cover without the driving device is detachably mounted, so that the gate can be ejected out of the bracket through the driving device after the box body end cover is detached; the gate is detachably connected with the driving end of the driving device, so that the gate can be automatically separated from the gate through the contraction of the driving device after the gate is detached and ejected.

Preferably, all or part of at least one of the case covers is of a removable construction to enable maintenance of components inside the rack after removal of all or part of the case cover.

Preferably, the first tubular body is connected with a pair of side covers of the box body and one of the side covers of the box body through a first flange plate, and the second tubular body is connected with a pair of side covers of the box body and the other of the side covers of the box body through a second flange plate; the first tubular body and the second tubular body are connected with the box body side cover through reinforcing ribs.

Preferably, the sealing isolation door further comprises a support; the support piece is arranged on the bracket and used for supporting the second surface so as to guide and limit the gate; the support members are disposed on both lateral sides of the gate to simultaneously support both lateral sides of the gate.

Preferably, the support is a roller or a rail.

Preferably, the number of the pressing assemblies is multiple, and at least one group of the pressing assemblies is arranged on two sides of the gate so as to simultaneously press the two sides of the gate.

Preferably, the sealing isolation door further comprises a guide rod, a guide mark and a measuring scale; the guide rod and the measuring ruler are mutually parallel and adjacently arranged, and the guide rod is parallel to the moving direction of the gate; the guide rod is arranged on the gate, the guide mark is arranged on the guide rod, the guide mark points to the scale mark of the measuring tape, and the measuring tape is arranged on the bracket.

Preferably, a through hole is formed in the gate; when the gate is at the opening position, the through hole is at least partially opposite to the port of the first pipeline; when the gate is at the sealing position, the through hole is staggered with the port of the first pipeline.

The invention also discloses thermal power generation equipment, which comprises the sealing isolation door.

Compared with the prior art, the invention has the following technical effects:

In the process that the gate moves from the opening position to the sealing position, the first pressing piece is contacted with the second pressing piece through the pressing molded surface, and gradually increasing pressing force is generated between the first pressing piece and the second pressing piece, and the second surface of the gate is pressed on the port of the first pipeline by the pressing force so as to balance the impact of high-pressure fluid on the second surface of the gate, and the port of the first pipeline is sealed under the condition of single-side high pressure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a sealing isolation door according to an embodiment of the present invention;

FIG. 2 is a schematic illustration of FIG. 1 with the first and second panels omitted;

FIG. 3 is a schematic view of the pressing profile of example A2;

FIG. 4 is a schematic view of the pressing profile of example A3;

FIG. 5 is a schematic view of the pressing profile of example A4;

FIG. 6 is a schematic view of the pressing profile in example B1;

FIG. 7 is a schematic view of the pressing profile of example B2;

FIG. 8 is a schematic view of the pressing profile of example B3;

FIG. 9 is a schematic illustration of a top view of a sealed isolation door according to an embodiment of the present invention;

FIG. 10 is a cross-sectional view taken along section A-A of FIG. 9;

FIG. 11 is an enlarged view of a portion of FIG. 10;

FIG. 12 is a schematic view of an embodiment of the seal isolation door with one of the box end caps omitted;

Fig. 13 is a schematic structural view of the shutter.

Reference numerals illustrate: 10-sealing an isolation door; 100-gate; 200-driving means; 300-bracket; 400-compacting assembly; 500-a first pipe; 600-second pipeline; 700-a first adjustment assembly; 800-a second adjustment assembly; 900-support;

110-closing the segment; 120-connecting sections; 121-a round hole; 130-a guide rod; 131-guide marks; 210-a piston rod; 310-box side cover; 320-a box end cap; 321-measuring scale; 322-angle steel; 330-case lid; 331-a cross bar; 332-a first panel; 333-a second panel; 410-a first compression member; 420-a second hold-down; 430-pressing the profile; 440-spring; 510-a first tubular body; 520-first anchor ear; 530—a first seal; 540-a first flange; 610-a second tubular body; 620-a second hoop; 630-a second seal; 640-a second flange; 641-connecting plates; 642-part of the connecting ring; 650-reinforcing ribs; 710—a first ring; 720-a first pusher; 810-a second ring element; 820-second pusher.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1 to 13, the present embodiment provides a sealing isolation door 10 capable of sealing at least an end portion of a first duct 500, including a gate 100, a driving device 200, and a bracket 300. Opposite side surfaces of the gate 100 are a first surface and a second surface. The second surface is configured to close the first conduit 500 in a sealed position and to at least partially open the first conduit 500 in an open position. The driving device 200 is mounted on the bracket 300 and connected to the shutter 100 to drive the shutter 100 to move between the sealing position and the opening position. The driving device 200 may be driven by electric, hydraulic, electrohydraulic, pneumatic, manual, etc., and may be selected by one skilled in the art according to practical needs.

In use, the seal isolation door 10 is continuously or intermittently pressurized on the side of the second surface relative to the side of the first surface, and therefore the side of the second surface is referred to as the high pressure side and the side of the first surface is referred to as the low pressure side. The first pipe 500 may be a pipe joint as an intermediate connector or may be a longer pipe for transporting materials, and the second pipe 600 mentioned below is the same. It will be appreciated that in order to achieve a seal at the end of the first conduit 500, the shape of the second surface should be compatible with the end of the first conduit 500. In this embodiment, the end of the first pipe 500 is planar, and the second surface is also planar.

The seal isolation door 10 of the present embodiment further includes a hold down assembly 400 for providing a hold down force that presses the gate 100 against the high pressure side.

The compression assembly 400 includes a first compression member 410 secured to the first surface and a second compression member 420 secured to the bracket 300. The first compression member 410 and the second compression member 420 each have a compression profile 430. During the movement of the shutter 100 from the open position to the sealing position, the first pressing member 410 and the second pressing member 420 are in contact through the pressing profile 430, and a gradually increasing pressing force is generated therebetween to press the second surface against the port of the first pipe 500 by the pressing force.

The first pressing member 410 and the second pressing member 420 may be in sliding contact or rolling contact. As long as the two can be pressed against each other, the first pressing member 410 receives a reaction force pressing it against the shutter 100. This reaction force may be inclined with respect to the second surface or perpendicular to the second surface.

In some examples, the first compression member 410 is in sliding contact with the second compression member 420:

example A1: the driving device 200 is a hydraulic cylinder, which is connected to the shutter 100 via a piston rod 210, and when the rod chamber of the hydraulic cylinder is fed with liquid, the shutter 100 moves to the sealing position, and when the rod chamber of the hydraulic cylinder is fed with liquid, the shutter 100 moves to the opening position.

Because of the presence of the piston rod 210 in the rod cavity of the hydraulic cylinder, the effective area of the piston in the rod cavity is smaller than that in the rodless cavity. If the pressure is the same when the rod cavity and the rodless cavity are used for feeding liquid, the acting force applied to the piston is larger when the rodless cavity is used for feeding liquid. In this example, with rod chamber feed, a relatively small force applied by the oil to the piston brings the gate 100 to the sealing position. When the rodless chamber is in fluid communication, the relatively greater force exerted by the fluid on the piston moves the gate 100 away from the sealing position. By pushing the gate 100 away from the sealing position with a relatively greater force, the gate 100 is prevented from being locked in the sealing position. According to different actual needs, the quantity of the hydraulic cylinders can be flexibly selected.

Example A2: referring to fig. 3, one of the pressing profiles 430 is an inclined plane, which is disposed obliquely with respect to the second surface. The other pressing profile 430 is a curved surface such as a cylindrical surface, an elliptic cylindrical surface (a straight line is formed by moving along an elliptic trajectory perpendicular to the straight line), a parabolic cylindrical surface (a straight line is formed by moving along a parabolic trajectory perpendicular to the straight line).

Example A3: referring to fig. 4, both pressing profiles 430 are inclined planes, which are disposed obliquely with respect to the second surface. The inclination angles of the two inclined planes are the same. The two pressing profiles 430 are in contact with each other and reduce the local pressure by means of the surface contact.

Example A4: referring to fig. 5, both pressing profiles 430 are curved. For example, one pressing profile 430 is cylindrical and the other pressing profile 430 is elliptical.

In some examples, the first compression member 410 is in rolling contact with the second compression member 420:

example B1: referring to fig. 6, one of the pressing profiles 430 is a rolling surface of a circular rolling member, and the other pressing profile 430 is an inclined plane or curved surface.

Example B2: referring to fig. 7, one of the pressing profiles 430 is a rolling surface of a circular rolling member, and the other pressing profile 430 is a combination of a parallel plane and an inclined plane. The parallel plane is parallel to the second surface and the inclined plane is inclined with respect to the second surface.

The circular rolling members are elastically deformed, so that when the shutter 100 moves to the sealing position, the circular rolling members sequentially pass through the inclined plane and the parallel plane, so that the pressing force between the first pressing member 410 and the second pressing member 420 is gradually increased and then maintained unchanged. At this time, the pressing force applied by the second pressing member 420 to the first pressing member 410 is not inclined with respect to the second surface but perpendicular to the second surface.

For examples B1 and B2, the friction force is small due to the selection of rolling contact, which not only contributes to a reduction in energy consumption, but also reduces wear of the pressing profile 430, thereby extending the service life.

Example B3: referring to fig. 8, on the basis of example B2, the circular rolling member is elastically displaceable such that, when the shutter 100 moves toward the sealing position, the circular rolling member sequentially passes through the inclined plane and the parallel plane, so that the pressing force between the first pressing member 410 and the second pressing member 420 is gradually increased and then maintained. At this time, the pressing force applied by the second pressing member 420 to the first pressing member 410 is not inclined with respect to the second surface but perpendicular to the second surface.

In some examples, the first conduit 500 is mounted on other devices (e.g., coal mills). In other examples, first conduit 500 is integrally connected to bracket 300:

Example C1: referring to fig. 1 and 11, the seal isolation door 10 further includes a first duct 500. The first conduit 500 includes a first tubular body 510, a first mounting assembly, and a first seal 530. The first tubular body 510 is mounted to the carrier 300, the first tubular body 510 having a first tube end facing the second surface, and a first mounting assembly mounts the first seal 530 to the first tube end. The first seal 530 is annular and is configured to seal a gap between the first pipe end and the second surface of the gate 100 in the sealed position. In the thermal power generation field, the first seal 530 is typically a packing.

Example C2: referring to fig. 11, in example C1, a first seal 530 is sleeved outside the first pipe end, and the first mounting assembly is a first anchor 520. The first anchor 520 holds the first sealing member 530 tightly from the outside so that the inner side surface of the first sealing member 530 is in close contact with the outer side surface of the first tubular body 510. Since the first seal 530 is disposed on the outside of the first tube end, it is convenient to install and replace it.

Example C3: referring to fig. 11, on the basis of example C2, the seal isolation door 10 further includes a first adjustment assembly 700, the first adjustment assembly 700 being mounted to the bracket 300 on a side of the first seal 530 facing away from the gate 100. The first adjustment assembly 700 is used to urge the first seal 530 toward the gate 100 such that the first seal 530 is capable of being in intimate contact with the second surface of the gate 100 when the gate 100 is in the sealing position. In operation of the first adjustment assembly 700, the first seal 530 is in sliding contact with the first anchor ear 520 and the first tubular body 510, respectively.

Example C4: referring to fig. 11, on the basis of example C3, the first adjustment assembly 700 includes a first ring 710 and a first pusher 720. The first ring 710 is configured to contact a side of the first seal 530 facing away from the gate 100 to move portions of the first seal 530 synchronously toward the gate 100. The first pushing member 720 serves to push the first ring member 710 toward the gate 100. For example, the first ring 710 may be an annular shim plate.

Example C5: referring to fig. 11, on the basis of example C4, the first pusher 720 is a screw having external threads, and the first pusher 720 is directly or indirectly mounted on the bracket 300. It is understood that the first pushing member 720 may be a hydraulic cylinder or the like, as long as the pushing member can perform a pushing function.

In some examples, second conduit 600 is also integrally connected to bracket 300:

Example C6: referring to fig. 1, 2, 10, and 11, the sealing and insulating door 10 further includes a second duct 600 on the basis of example C1. The second conduit 600 includes a second tubular body 610, a second mounting assembly, and a second seal 630. A second tubular body 610 is mounted to the stent 300, the second tubular body 610 having a second tube end facing the first surface. The second mounting assembly mounts a second seal 630 to the second pipe end, the second seal 630 being annular in shape for sealing a gap between the second pipe end and the first surface of the gate 100 in the sealed position. In the thermal power generation field, the second seal 630 is typically a packing.

Similarly, a second seal 630 is sleeved outside the second tube end and the second mounting assembly is a second ferrule 620. The second hoop 620 clasps the second sealing member 630 from the outside so that the inner side surface of the second sealing member 630 is in close contact with the outer side surface of the second tubular body 610. Since the second sealing member 630 is provided on the outside of the second pipe end, it is convenient to install and replace it.

The seal isolation door 10 further includes a second adjustment assembly 800, the second adjustment assembly 800 being mounted to the bracket 300 on a side of the second seal 630 facing away from the gate 100. The second adjustment assembly 800 is used to urge the second seal 630 toward the gate 100 such that the second seal 630 can be in close contact with the first surface of the gate 100 when the gate 100 is in the sealing position. In operation, second seal 630 is in sliding contact with second anchor ear 620 and second tubular body 610, respectively.

The second adjustment assembly 800 includes a second ring 810 and a second pusher 820. The second ring 810 is configured to contact a side of the second sealing member 630 facing away from the gate 100 to move portions of the second sealing member 630 synchronously toward the gate 100. The second pusher 820 is used to push the second ring 810 toward the gate 100. For example, the second ring 810 may be an annular shim plate.

The second pusher 820 is a screw having external threads, and the second pusher 820 is screw-coupled with the bracket 300. It is understood that the second pushing member 820 may be of other types such as a hydraulic cylinder, as long as the pushing action is achieved.

Example C7: referring to fig. 2, 9, 10, and 12, on the basis of example C6, the bracket 300 has a box shape including a pair of box side covers 310, a pair of box end covers 320, and a pair of box face covers 330.

The shutter 100 is located inside the bracket 300. The driving end of the driving device 200, such as the piston rod 210 of the hydraulic cylinder, passes through a corresponding through hole in one of the box end caps 320 and is connected to the shutter 100. The second pressing member 420 is mounted on the box side cover 310. The first tubular body 510 passes through one of the cassette face covers 330 and the second tubular body 610 passes through the other cassette face cover 330, with both the first seal 530 and the second seal 630 being located between the two cassette face covers 330.

Example C8: on the basis of example C7, the cartridge body cover 320 to which the driving device 200 is not mounted is detachably mounted (for example, by bolting) so that the shutter 100 can be ejected out of the holder 300 by the driving device 200 after the cartridge body cover 320 is detached. The gate 100 is detachably connected (e.g., by bolting) to the drive end of the drive device 200 (e.g., the piston rod 210 of the hydraulic cylinder) to enable the drive end to be automatically separated from the gate 100 by retraction of the drive end after the gate 100 is uninstalled from the drive end and the gate 100 is ejected from the bracket 300 by the drive end. The gate 100 is easy and convenient to disassemble, and the replacement efficiency of the gate 100 can be improved.

Example C9: on the basis of example C8, all or part of at least one of the cassette covers 330 is of a detachable construction to enable maintenance of components inside the rack 300 after the removal of all or part of the cassette covers 330.

Example C10: referring to fig. 2, 10, and 12, on the basis of example C9, a first flange 540 is provided on the first tubular body 510, and a second flange 640 is provided on the second tubular body 610. The first tubular body 510 is connected to one of the cassette lids 330 by a first flange 540 and the second tubular body 610 is connected to the other cassette lid 330 by a second flange 640. The first tubular body 510 and the second tubular body 610 are connected to the box side cover 310 by the reinforcing ribs 650.

Specifically, the cassette lid 330 includes a cross-bar 331, a first panel 332, and a second panel 333. The cross bar 331 supports the first panel 332 and the second panel 333, and two ends of the cross bar 331 are connected to the two box side covers 310, respectively. The cross bars 331 may be angle steel, leaving a gap between the cross bars 331 of the two cassette face covers 330 for the gate 100 to pass through. The first panel 332 and the second panel 333 are respectively located at two longitudinal sides of the cross bar 331, and the edge of the first panel 332 is provided with a circular arc concave. The four first panels 332 are disposed in the circumferential direction of the first flange 540 and the second flange 640, and the first flange 540 and the second flange 640 are connected to the circular arc-shaped concave portions of the four first panels 332 by bolts. One end of the second panel 333 in the longitudinal direction is connected to the box body end cover 320, the other end of the second panel 333 in the longitudinal direction is connected to the cross bar 331, and both lateral ends of the second panel 333 are respectively connected to the two box body side covers 310. The longitudinal direction refers to the moving direction of the shutter 100, and the longitudinal direction of the cross bar 331 is the transverse direction. The transverse direction is perpendicular to the longitudinal direction and is parallel to the second surface.

The first flange 540 and the second flange 640 each comprise a connection plate 641 and a part of connection ring 642, four connection plates 641 are uniformly distributed along the circumferential direction of the first flange 540 or the second flange 640, and two adjacent connection plates 641 are connected through the part of connection ring 642. Wherein, two of the connecting plates 641 opposite to each other are welded to the two box side covers 310, and the other two connecting plates 641 opposite to each other are welded to the two cross bars 331. A first panel 332 is disposed between the two connection plates 641, two sides of the first panel 332 are connected to the adjacent connection plates 641 by bolts, and the other two sides of the first panel 332 are connected to the cross bar 331 and the box side cover 310 by bolts, respectively.

When maintenance is required on the components inside the rack 300, the first panel 332, the second panel 333, or a combination thereof may be selectively removed according to actual needs.

The box side cover 310 may be configured as a square tube to increase the structural strength of the stand 300. The first tubular body 510 and the second tubular body 610 are mainly supported by the box side cover 310 and the reinforcing ribs 650, and the box side cover 330 only plays an auxiliary supporting role. The first tubular body 510 and the reinforcing rib 650, the second tubular body 610 and the reinforcing rib 650, the reinforcing rib 650 and the box side cover 310, and the cross bar 331 and the box side cover 310 are all preferably welded.

The case end cap 320 for mounting the driving device 200 may be selected to have a square tube structure for improved strength. Another case end cap 320 (case end cap 320 to be detached when the door 100 is replaced) may be an end plate structure, between which angle steel 322 is disposed and a second panel 333, and the end plate structure and the second panel 333 are respectively connected to two plate surfaces of the angle steel 322 by bolts.

In some examples, the gate 100 is supported by the support 900, rather than only supporting the gate 100 by the end of the first conduit 500:

Example D1: referring to fig. 2 and 10, the seal isolation door 10 further includes a support 900. The support 900 is mounted to the bracket 300 for supporting the second surface to guide and limit the shutter 100. The supporting pieces 900 are disposed at both lateral sides of the shutter 100 to simultaneously support both lateral sides of the shutter 100.

Example D2: based on example D1, the support 900 is a roller or a rail. When the support 900 is a roller, it rollingly supports the gate 100. When the support 900 is a slide rail, it slidably supports the gate 100.

In some examples, both sides of the gate 100 are pressurized simultaneously to improve the sealing effect:

Example E1: the number of the pressing assemblies 400 is plural, and at least one group of the pressing assemblies 400 is disposed at both sides of the shutter 100 to simultaneously press both sides of the shutter 100. For example, referring to fig. 11, two sets of pressing assemblies 400 may be disposed at both sides of the shutter 100, respectively.

In some examples, the position of the gate 100 is displayed by a guide 131 that moves synchronously with the gate 100 for real-time observation by a worker:

Example F1: referring to fig. 2 and 9, the airtight isolation door 10 further includes a guide bar 130, a guide 131 and a measuring tape 321. The guide bar 130 and the measuring tape 321 are disposed parallel to and adjacent to each other, and the guide bar 130 is parallel to the moving direction of the shutter 100. The guide bar 130 is installed on the gate 100, the guide mark 131 is installed on the guide bar 130, the guide mark 131 points to the scale line of the measuring tape 321, and the measuring tape 321 is installed on the bracket 300.

For example, the measuring tape 321 may be a tube, one end of which is connected to the bracket 300, and one end of the guide bar 130 extends into the tube. The tube body is provided with a strip-shaped groove along the axis direction, and the guide marks 131 extend out of the strip-shaped groove. The outer side surface of the pipe body is provided with scale marks, and the scale marks are positioned on one side or two sides of the strip-shaped groove and used for marking the position change along the axial direction of the pipe body. The position of the gate 100 can be known by observing the specific scale at which the guide marks 131 point.

In some examples, a through hole is provided in the shutter 100, and the on-off state of the first pipe 500 is changed by adjusting the position of the through hole:

Example G1: referring to fig. 12 and 13, a through hole is provided in the shutter 100. The through-hole is at least partially aligned with the port of the first conduit 500 when the gate 100 is in the open position. The through-holes are offset from the ports of the first conduit 500 when the gate 100 is in the sealed position.

Specifically, the shutter 100 may be a square plate, which is provided with a closing section 110 and a communicating section 120, respectively, in its own longitudinal direction, the closing section 110 being provided with no through hole, and the communicating section 120 being provided with a circular hole 121. The closing section 110 closes the end of the first pipe 500 when the shutter 100 is in the sealing position. When the shutter 100 is in the open position, the through hole of the communication section 120 is at least partially aligned with the port of the first pipe 500.

Preferably, the first tubular body 510 and the second tubular body 610 have the same inner diameter and the same outer diameter, and the diameter of the through hole of the communication section 120 of the shutter 100 is between the inner diameter and the outer diameter of the first tubular body 510. The through-hole of the communication section 120 is coaxial with the first tubular body 510 when the shutter 100 is in the open position.

When the driving device 200 is a hydraulic cylinder (i.e., example A1), the piston rod 210 is connected to the communication section 120 of the shutter 100 instead of the closing section 110, so that the circular hole 121 gradually moves toward the hydraulic cylinder when the rod chamber of the hydraulic cylinder is fed with liquid, and the closing section 110 gradually closes the end of the first pipe 500.

The present embodiment also provides a thermal power plant including the above-described airtight isolation door 10. Since the thermal power plant includes the airtight isolation door 10 described above, the above advantages of the airtight isolation door 10 are also provided, and will not be described here again.

The principles and embodiments of the present invention have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.

Claims (25)

1. A sealing isolation door capable of sealing at least an end of a first pipeline comprises a gate, a driving device and a bracket; the surfaces of two opposite sides of the gate are respectively a first surface and a second surface; the second surface is used for sealing the first pipeline in a sealing position and at least partially opening the first pipeline in an opening position; the driving device is arranged on the bracket and connected with the gate so as to drive the gate to move between the sealing position and the opening position;

The method is characterized in that:

The sealing isolation door further comprises a compression assembly;

The pressing assembly comprises a first pressing piece fixed on the first surface and a second pressing piece fixed on the bracket; the first pressing piece and the second pressing piece are provided with a pressing molded surface; in the process that the gate moves from the opening position to the sealing position, the first pressing piece and the second pressing piece are contacted through the pressing molded surface, and gradually increasing pressing force is generated between the first pressing piece and the second pressing piece, so that the second surface is pressed on the port of the first pipeline through the pressing force.

2. The seal isolation door of claim 1, wherein the first compression member is in sliding contact with the second compression member.

3. The seal isolation door of claim 2, wherein the drive device is a hydraulic cylinder connected to the gate by a piston rod, and wherein the gate moves to the sealing position when a rod cavity of the hydraulic cylinder is in fluid communication and moves to the open position when a rod cavity of the hydraulic cylinder is not in fluid communication.

4. The seal isolation door of claim 2, wherein one of the pressing profiles is an inclined plane, the inclined plane being disposed obliquely with respect to the second surface; the other pressing profile is a curved surface.

5. The seal isolation door of claim 2, wherein both of the pressing profiles are inclined planes, the inclined planes being disposed obliquely with respect to the second surface; the inclination angles of the two inclined planes are the same.

6. The seal isolation door of claim 2, wherein both of the compression profiles are curved.

7. The seal isolation door of claim 1, wherein one of the pressing profiles is a rolling surface of a circular rolling member and the other pressing profile is an inclined plane or curved surface.

8. The seal isolation door of claim 1, wherein one of said pressing profiles is a rolling surface of a circular rolling element and the other of said pressing profiles is a combination of parallel and angled planes; the parallel plane is parallel to the second surface, and the inclined plane is inclined relative to the second surface;

the circular rolling parts can elastically deform, so that when the gate moves to the sealing position, the circular rolling parts sequentially pass through the inclined plane and the parallel plane, so that the pressing force between the first pressing part and the second pressing part is gradually increased and then kept unchanged.

9. The seal isolation door of claim 8, wherein the circular rolling member is capable of elastic displacement such that when the gate is moved to the sealing position, the circular rolling member passes through the inclined plane and the parallel plane in sequence such that a pressing force between the first pressing member and the second pressing member is gradually increased and then maintained.

10. The seal isolation door of claim 1, further comprising the first conduit;

The first conduit includes a first tubular body, a first mounting assembly, and a first seal; the first tubular body being mounted to the bracket, the first tubular body having a first tube end facing the second surface, the first mounting assembly mounting the first seal to the first tube end; the first seal is annular for sealing a gap between the first tube end and the second surface of the gate in the sealing position.

11. The seal isolation door of claim 10, wherein the first seal is sleeved outside the first tube end, the first mounting assembly is a first anchor, and the first anchor brings the first seal into intimate contact with the first tubular body.

12. The seal isolation door of claim 11, further comprising a first adjustment assembly mounted to the bracket on a side of the first seal facing away from the gate; the first adjustment assembly is for urging the first seal toward the gate.

13. The seal isolation door of claim 12, wherein the first adjustment assembly comprises a first ring and a first pusher; the first annular piece is used for contacting one side of the first sealing piece, which faces away from the gate, so that all parts of the first sealing piece move synchronously towards the gate; the first pushing member is configured to push the first ring member toward the shutter.

14. The seal isolation door of claim 13, wherein the first pusher is a threaded member having external threads, the first pusher being mounted directly or indirectly on the bracket.

15. The seal isolation door of claim 10, further comprising a second conduit;

The second conduit includes a second tubular body, a second mounting assembly, and a second seal; the second tubular body being mounted to the bracket, the second tubular body having a second tube end facing the first surface; the second mounting assembly mounts the second seal to the second tube end, the second seal being annular for sealing a gap between the second tube end and the first surface of the gate in the sealing position.

16. The seal isolation door of claim 15, wherein the bracket is box-shaped and comprises a pair of box side covers, a pair of box end covers, and a pair of box face covers;

the gate is positioned on the inner side of the bracket; the driving end of the driving device penetrates through one of the box body end covers and is connected with the gate; the second pressing piece is arranged on the side cover of the box body; the first tubular body passes through one box body face cover, the second tubular body passes through the other box body face cover, and the first sealing piece and the second sealing piece are both positioned between the two box body face covers.

17. The seal isolation door of claim 16, wherein the cartridge end cap to which the drive is not attached is removably attached such that the gate can be ejected out of the bracket by the drive after removal of the cartridge end cap; the gate is detachably connected with the driving end of the driving device, so that the gate can be automatically separated from the gate through the contraction of the driving device after the gate is detached and ejected.

18. The seal-off door of claim 17, wherein all or part of at least one of the cassette covers is removable to allow maintenance of components inside the rack after removal of all or part of the cassette covers.

19. The seal isolation door of claim 16, wherein said first tubular body is connected to a pair of said box side covers and one of said box side covers, respectively, by a first flange, and said second tubular body is connected to a pair of said box side covers and the other of said box side covers, respectively, by a second flange; the first tubular body and the second tubular body are connected with the box body side cover through reinforcing ribs.

20. The seal isolation door of claim 1, further comprising a support; the support piece is arranged on the bracket and used for supporting the second surface so as to guide and limit the gate; the support members are disposed on both lateral sides of the gate to simultaneously support both lateral sides of the gate.

21. The seal isolation door of claim 20, wherein the support is a roller or a rail.

22. The seal isolation door of claim 1, wherein the number of hold down assemblies is a plurality of groups, at least one group of the hold down assemblies being disposed on both sides of the gate to simultaneously apply pressure to both sides of the gate.

23. The seal isolation door of claim 1, further comprising a guide bar, a guide mark, and a measuring tape; the guide rod and the measuring ruler are mutually parallel and adjacently arranged, and the guide rod is parallel to the moving direction of the gate; the guide rod is arranged on the gate, the guide mark is arranged on the guide rod, the guide mark points to the scale mark of the measuring tape, and the measuring tape is arranged on the bracket.

24. The seal isolation door of any one of claims 1 to 23, wherein a through hole is provided in the gate; when the gate is at the opening position, the through hole is at least partially opposite to the port of the first pipeline; when the gate is at the sealing position, the through hole is staggered with the port of the first pipeline.

25. A thermal power plant comprising a seal isolation door as claimed in any one of claims 1 to 24.