CN112628418B - Breakable gate valve and vacuum pipeline with same - Google Patents

Abstract

The invention provides a fragile gate valve and a vacuum pipeline with the same, wherein the fragile gate valve comprises: a base; the opening and closing mechanism is arranged on the base; the flashboard is connected with the opening and closing mechanism, the opening and closing mechanism is used for driving the flashboard to move so as to realize the opening and closing of the vacuum pipeline structure, and the flashboard comprises a fragile area; when the flashboard collides with a train, the fragile area is instantaneously cracked to avoid the damage to the train caused by the impact force; when the flashboard works normally, the flashboard can bear the atmospheric pressure difference on two sides of the flashboard. By applying the technical scheme of the invention, the technical problem of low safety performance of the gate valve for the vacuum pipeline in the prior art is solved.

Description

Breakable gate valve and vacuum pipeline with same

Technical Field

The invention relates to the technical field of magnetic suspension vacuum pipeline traffic systems, in particular to a fragile gate valve and a vacuum pipeline with the fragile gate valve.

Background

The invention is used for a magnetic suspension vacuum pipeline traffic system, and vehicles are arranged in a vacuum pipeline to operate in order to reduce air resistance when the vehicles operate at high speed. The lower part of the vacuum pipeline is a track for the vehicle to run, an electric coil is arranged on the side wall of the track to provide suspension force and guiding force for the vehicle, and a supporting wheel track for supporting wheels to run is further designed at the bottom of the track, as shown in fig. 12 and 13.

In order to conveniently overhaul the line, the vacuum pipeline needs to be divided into a plurality of sections by using a gate valve, if the vacuum pipeline of a certain section is repaired, gate valves at two ends of the section are closed in advance, and then the atmospheric pressure is restored for the section. According to the calculation of the vacuum pumping capacity of the vacuum equipment and the line maintenance operation time, the length of the segments of the vacuum pipeline is about dozens of kilometers, so that nearly hundreds of gate valves are mounted on a line with the length of one thousand kilometers.

The train in the vacuum pipeline runs at a very high speed, once the train collides with an obstacle, the consequences are unimaginable, the vacuum pipeline is a closed independent space, foreign matters cannot be invaded, the only collision factor which possibly occurs is the flashboards of a plurality of flashboards which are distributed on a line, all the flashboards are in an open state when the train runs, the flashboards are located outside the section of the vacuum pipeline, the train cannot collide with the flashboards, but due to the fact that the number of the flashboards on the vacuum pipeline is large, the phenomenon that some flashboards are mistakenly closed under the self fault condition is not eliminated, and therefore the train collides with the train running at a high speed.

At present, the vacuum pipeline does not enter the engineering implementation and application stage worldwide, and from the disclosed technical data, the gate valve structure pipeline structure for vacuum pipeline transportation is shown in fig. 14 to 18.

Fig. 14 and 15 show the overall structure of a gate valve of the prior art, which consists of three major parts: the gate valve outer frame, telescopic cylinder, flashboard. The outer frame of the gate valve and the pipeline are welded into an integrated air tightness structure, the telescopic cylinder and the gate are installed in the outer frame, the telescopic cylinder stretches out and retracts to correspond to the gate valve to be closed and opened, and when the gate valve is opened, a train is allowed to normally pass. When the gate valve is closed, the atmospheric pressure can be restored to the corresponding pipeline section for maintenance or other work (in fig. 14 and 15, the telescopic cylinder is in a retracted state, and the gate is in an open state).

Fig. 16 and 17 show a prior art shutter structure, in which lateral sealing rubbers are designed to be fitted with lateral sealing rubber fitting regions on a metal pipe to achieve sealing in order to ensure airtightness. Atmospheric pressure load borne by one side of the gate plate is transmitted to the vacuum pipeline through the lateral sealing rubber.

The gate valve of the existing structure has the following technical disadvantages.

First, the flashboard of current slide valve is made for the steel construction, does not adopt "fragile" design, and when flashboard closing mechanism broke down, the flashboard normally falls, and bumps with the train of high-speed operation, takes place serious safety problem.

Secondly, the existing gate valve has no 'failure guide safety' design, and when the gate opening and closing mechanism fails or power failure, air stop and the like occur, the gate valve may fall under the action of the gravity of the gate valve and collide with a train running at high speed, and because many gate valves are arranged along the vacuum pipeline, the potential safety hazard is not ignored.

Thirdly, as the gate valve realizes closing action from top to bottom, the sealing of the horizontal plane of the upper side wall of the track, the horizontal plane of the bottom of the track and the horizontal plane of the supporting wheel track is very easy to realize (figure 18), and the sealing of the vertical plane of the upper side wall of the track and a plurality of right-angled edges is very difficult to realize. In the prior art, the rail bottom and the rail side wall of the lower rail are disconnected by a certain depth (fig. 19) so that the gate valve is inserted, and therefore, the side surface of the gate is in close contact with the side surface of the disconnected part of the rail in the lateral direction to realize sealing.

Because the electric coil is arranged on the side wall of the track, the track bottom is provided with the support wheel track surface, and the electric coil and the support wheel track surface are disconnected and discontinuous at the disconnected part (figures 14 and 15), the stability and the comfort of the train operation are influenced, and the potential safety hazard of the train operation can be caused.

Fourth, do not design the mechanical locking mechanism of slide valve in the current design, when a certain district section that needs overhauld the vacuum pipe, close the slide valve at this district section both ends, resume an atmospheric pressure, then personnel get into this district section and develop work, can not get rid of the telescopic cylinder of the slide valve of this district section both sides because gas leakage, artificial maloperation or other reasons and open, so this district section is in the twinkling of an eye with the vacuum environment UNICOM of both sides, carries out the staff that overhauls the work to getting into the repressing section and causes very big potential safety hazard.

Disclosure of Invention

The invention provides a fragile gate valve and a vacuum pipeline with the same, and can solve the technical problem that the gate valve for the vacuum pipeline in the prior art is low in safety performance.

According to an aspect of the present invention, there is provided a frangible gate valve comprising: a base; the opening and closing mechanism is arranged on the base; the gate plate is connected with an opening and closing mechanism, the opening and closing mechanism is used for driving the gate plate to move so as to realize the opening and closing of the vacuum pipeline structure, and the gate plate comprises a fragile area; when the flashboard collides with the train, the fragile area is broken instantly to avoid the damage of the train caused by impact force; when the flashboard normally works, the flashboard can bear the atmospheric pressure difference on two sides of the flashboard.

Further, the flashboard still includes the striking district, and the striking district sets up in the middle part of flashboard and is located the region of bumping with the sharp portion of train head type, and the striking district is connected with breakable district, and the intensity in striking district is less than the intensity in breakable district, and the striking district is used for guaranteeing the fragility of breakable district when the flashboard valve collides with the train.

Furthermore, the gate valve also comprises a counterweight component, the counterweight component is connected with the gate, the counterweight component is used for providing traction force to prevent the gate from falling freely caused by the failure of the opening and closing mechanism, and the traction force provided by the counterweight component is greater than the dead weight of the gate.

Further, the counter weight subassembly includes pivot, first balancing weight, first pulley, second pulley, first haulage rope and second haulage rope, and the pivot rotationally sets up on the base, and first pulley and second pulley setting are in the pivot, and the both ends of first haulage rope are connected with first pulley and flashboard respectively, and the both ends of second haulage rope are connected with second pulley and first balancing weight respectively.

Furtherly, the counter weight subassembly still includes third pulley, third haulage rope and second balancing weight, and first pulley and flashboard all set up in the inside of base, and second pulley and third pulley setting just are located the both ends of pivot in the outside of base, and first pulley setting is between second pulley and third pulley, and the both ends of third haulage rope are connected with third pulley and second balancing weight respectively.

Further, the gate valve further comprises a track sealing element and an inflating element, the track sealing element is arranged at the bottom of the gate, the track sealing element is used for being in sealing fit with a track of the vacuum pipeline structure, and the track sealing element is provided with a cavity; the inflation element is communicated with the cavity of the track sealing element and used for inflating the cavity to realize the track sealing fit of the track sealing element and the vacuum pipeline structure.

Further, the gate valve also comprises a pipeline sealing element, the pipeline sealing element is arranged on the side face of the gate, and the pipeline sealing element is used for being in sealing fit with the vacuum pipeline structure.

Further, the track sealing element comprises a first sealing section, a second sealing section, a third sealing section, a fourth sealing section and a fifth sealing section which are connected in sequence, the first sealing section, the third sealing section and the fifth sealing section are horizontally arranged, the second sealing section and the fourth sealing section are vertically arranged, the first sealing section and the fifth sealing section are respectively matched with a horizontal plane of a track side wall of the vacuum pipeline structure, the second sealing section and the fourth sealing section are respectively matched with a vertical plane of a track side wall of the vacuum pipeline structure, the third sealing section is matched with a bottom surface of the track of the vacuum pipeline structure, and the first sealing section, the second sealing section, the third sealing section, the fourth sealing section and the fifth sealing section are provided with cavities.

Further, the gate valve also comprises a locking mechanism, the locking mechanism is arranged on the base, the gate plate is provided with a clamping groove, and the locking mechanism is used for being matched with the clamping groove when the gate plate moves to a set position so as to realize the locking of the gate plate and the base in the closing state of the gate plate.

According to another aspect of the present invention there is provided a vacuum conduit comprising a vacuum conduit structure and a frangible gate valve as described above, the base of the frangible gate valve being fixedly disposed on the vacuum conduit structure.

By applying the technical scheme provided by the invention, the fragile gate valve is designed in a fragile manner, and the fragile area is designed on the gate, so that when the gate valve is in failure and collides with a train, the fragile area of the gate can be instantaneously crushed, the structural damage which endangers the air tightness safety can not be caused to the train structure, the safety performance of the gate valve is improved, and the safety of the train running at high speed is ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 illustrates a cross-sectional view of a frangible gate valve provided in accordance with a specific embodiment of the present invention in an open state;

FIG. 2 shows a side view of the frangible gate valve provided in FIG. 1 in an open state;

FIG. 3 shows a side cross-sectional view of the pulley portion of the frangible gate valve provided in FIG. 1 in the open state;

FIG. 4 illustrates a front view of a ram provided in accordance with a particular embodiment of the present invention;

FIG. 5 illustrates a side view of the shutter plate provided in FIG. 4;

FIG. 6 illustrates a cross-sectional view of a frangible gate valve provided in accordance with a specific embodiment of the present invention in a closed state;

FIG. 7 shows a side view of the frangible gate valve provided in FIG. 6 in a closed state;

FIG. 8 illustrates a side cross-sectional view of the pulley portion of the frangible gate valve provided in FIG. 6 in a closed condition;

FIG. 9 illustrates a front view of a ram, pipe seal element, and rail seal element assembly provided in accordance with a particular embodiment of the present invention;

FIG. 10 illustrates a side view of the gate, pipe seal element and rail seal element assembly provided in FIG. 9;

FIG. 11 illustrates a cross-sectional view of a rail structure of a gate valve mounting location provided in accordance with a specific embodiment of the present invention;

FIG. 12 shows a cross-sectional view of a rail of a vacuum duct structure provided in the prior art;

FIG. 13 shows a side view of the rails of the vacuum duct structure provided in FIG. 12;

FIG. 14 shows a cross-sectional view of a gate valve structure provided in the prior art;

FIG. 15 shows a side view of the gate valve structure provided in FIG. 14;

FIG. 16 illustrates a cross-sectional view of a gate used in a gate valve structure provided in the prior art;

FIG. 17 shows a side view of a gate for use with the gate valve structure provided in FIG. 16;

FIG. 18 shows a cross-sectional view of a track structure provided in the prior art;

fig. 19 shows a sectional view of a track structure of a break-away design provided in the prior art.

Wherein the figures include the following reference numerals:

10. a base; 20. an opening and closing mechanism; 30. a shutter plate; 31. a frangible region; 32. an impact zone; 33. a non-frangible region; 30a, a card slot; 40. a counterweight assembly; 41. a rotating shaft; 42. a first weight block; 43. a first pulley; 44. a second pulley; 45. a first pull cord; 46. a second pull cord; 47. a third pulley; 48. a third pull cord; 49. a second counterweight block; 401. a bearing sealing element; 50. a rail sealing element; 50a, a cavity; 51. a first seal section; 52. a second seal section; 53. a third seal section; 531. a wheel-rail sealing surface; 532. a rail foot sealing surface; 54. a fourth seal section; 55. a fifth seal section; 60. an inflation element; 70. a pipe sealing element; 80. a locking mechanism; 81. a spring; 82. buckling; 100. round corners; 110. a wheel rail horizontal plane; 120. rail foot level; 130. an electric coil.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 10, according to the embodiment of the present invention, there is provided a frangible gate valve, which includes a base 10, an opening and closing mechanism 20 and a gate 30, wherein the opening and closing mechanism 20 is disposed on the base 10, the gate 30 is connected to the opening and closing mechanism 20, the opening and closing mechanism 20 is used for driving the gate 30 to move to open and close a vacuum pipe structure, the gate 30 includes a frangible zone 31, wherein, when the gate 30 collides with a train, the frangible zone 31 is broken instantaneously to avoid the train from being damaged by impact force; when the shutter 30 is normally operated, the shutter 30 can withstand the atmospheric pressure difference on both sides thereof.

Use this kind of configuration, provide a breakable slide valve, this breakable slide valve adopts "breakable" design, through design breakable district on the flashboard, when the slide valve breaks down and the train bumps, the breakable district of flashboard can be hit the bits of broken glass in the twinkling of an eye to avoid producing too big impact force and cause the structrual damage that endangers gas tightness safety to the train structure, this kind of mode has improved the security performance of slide valve, guarantees the security of high-speed operation train.

Further, in the present invention, the entire shutter 30 may be provided as the fragile region, or a partial region of the shutter 30 may be provided as the fragile region 31, as shown in fig. 4, as an embodiment of the present invention, a region of the shutter 30 which is matched with the section of the vacuum pipe is designed as the fragile region 31, and a region of the upper portion of the shutter 30 which is not matched with the section of the vacuum pipe is the non-fragile region 33, and may be made of a steel material. In the present invention, the fragile zone 31 may be made of brittle materials such as glass and carbon fiber, and it needs to have a certain strength, which can withstand the pressure difference of one atmosphere around it in normal use, but can be instantaneously crushed when colliding with a train running at high speed, without causing structural damage to the train structure, which affects its airtightness.

In addition, in the present invention, in order to achieve both the strength of the gate plate and the "frangibility" property at the time of collision, the gate plate 30 may be configured to further include an impact region 32, the impact region 32 is disposed in the middle of the gate plate 30 and is located in a region where the tip of the train head collides, the impact region 32 is connected to the frangibility region 31, the strength of the impact region 32 is smaller than that of the frangibility region 31, and the impact region 32 is used to ensure the frangibility of the frangibility region 31 at the time of collision of the gate plate valve with the train. In the invention, the impact area 32 is weakened to enable the strength of the impact area 32 to be smaller than that of the fragile area 31, when the gate valve is in failure and collides with a train, the impact area 32 is firstly broken, and the force generated by the breaking at the impact area is transmitted to the fragile area 31 so as to accelerate the breaking of the fragile area and prevent the train from being damaged.

In the present invention, in order to further improve the safety performance of the gate valve, the gate valve may be configured to further include a weight assembly 40, the weight assembly 40 being connected to the gate 30, the weight assembly 40 being configured to provide a traction force to prevent the gate 30 from falling freely due to the failure of the opening and closing mechanism 20, the traction force provided by the weight assembly 40 being greater than the self weight of the gate 30.

Use this kind of configuration, through the design theory that adopts "trouble direction safety", through setting up the counter weight subassembly, the counter weight subassembly is connected with the flashboard, and when the closing mechanism who is used for driving the flashboard motion broke down, the counter weight subassembly provided traction force and dropped under self gravity in order to prevent that the flashboard from, this is equivalent to increased one deck safety redundancy again on the basis of "fragile" flashboard to can further improve the security performance of flashboard valve, guarantee the security of high-speed operation train.

Further, as an embodiment of the present invention, in order to effectively provide the traction force, the weight assembly 40 may be configured to include a rotating shaft 41, a first weight block 42, a first pulley 43, a second pulley 44, a first traction rope 45 and a second traction rope 46, wherein the rotating shaft 41 is rotatably disposed on the base 10, the first pulley 43 and the second pulley 44 are disposed on the rotating shaft 41, both ends of the first traction rope 45 are respectively connected to the first pulley 43 and the shutter 30, and both ends of the second traction rope 46 are respectively connected to the second pulley 44 and the first weight block 42.

With this configuration, when the gate valve itself fails, for example, the closing and opening mechanism fails to contract under power failure, gas cut-off, etc., the gate 30 will not fall down because of the traction of the first traction rope 45, and the traction of the first traction rope 45 to the gate 30 is provided by the first counterweight 42 and transmitted through the second traction rope 46, the second pulley 44 and the first pulley 43.

Specifically, in this embodiment, one end of the first pulling rope 45 is fixed on the first pulley 43 and is wound around the first pulley 43, the other end of the first pulling rope 45 is connected to the shutter 30, one end of the second pulling rope 46 is fixed on the second pulley 44 and is wound around the second pulley 44, and the other end of the second pulling rope 46 is connected to the first counterweight 42. The first pulley 43 and the second pulley 44 are both fixedly disposed on the rotating shaft 41 and rotate synchronously with the rotating shaft 41. The flashboard valve is in the open mode under normal conditions, and when the closing mechanism broke down, the flashboard moved down under self gravity, because flashboard 30 is connected with first haulage rope, under the effect of first haulage rope, flashboard 30 can not fall. The traction force of the first traction rope 45 to the shutter 30 is provided by the first counterweight 42 and is transmitted through the second traction rope 46, the second pulley 44 and the first pulley 43. When the gate valve does not break down, when the gate valve needs to be closed, the switching mechanism drives the gate plate 30 to move downwards along the vertical direction, the gate plate 30 drives the first hauling rope 45 to extend, the extension movement of the first hauling rope 45 drives the rotating shaft 41 to rotate, the rotation of the rotating shaft 41 enables the second hauling rope to be wound on the second pulley 44 gradually, and the first balancing weight 42 is driven to move upwards along the vertical direction.

Further, in the present invention, as still another embodiment of the present invention, as shown in fig. 1 to 8, in order to improve the smoothness of the operation of the counterweight assembly, the counterweight assembly 40 may be configured to further include a third pulley 47, a third traction rope 48, and a second counterweight 49, the first pulley 43 and the shutter 30 are both disposed inside the base 10, the second pulley 44 and the third pulley 47 are disposed outside the base 10 and at both ends of the rotating shaft 41, the first pulley 43 is disposed between the second pulley 44 and the third pulley 47, and both ends of the third traction rope 48 are connected to the third pulley 47 and the second counterweight 49, respectively.

In this configuration, the rotation shaft 41 is rotatably provided on the base 10 through a bearing, the second pulley 44 and the third pulley 47 are provided at both ends of the rotation shaft 41, respectively, the first pulley 43 is provided at the middle portion of the rotation shaft 41, when the gate valve itself is out of order, for example, the closing mechanism is out of order in case of power failure, gas cut, etc., the gate 30 will not fall down due to the traction of the first traction rope 45, the traction force of the first traction rope 45 to the gate plate 30 is provided by the first balancing weight 42 and the second balancing weight 49 at the same time, the traction force provided by the first balancing weight 42 is transmitted through the second traction rope 46, the second pulley 44 and the first pulley 43, and the traction force provided by the second balancing weight is transmitted through the third traction rope 48, the third pulley 47 and the first pulley 43, so that the rotation stability of the rotating shaft 41 can be improved, and the force transmission stability is further improved.

Further, in the present invention, since the first pulley 43 is located inside the base, the second pulley 44 and the third pulley 47 are located outside the base, and there is an atmospheric pressure inside and outside the base, the bearing sealing member 401 is designed on the bearing supporting the rotation of the rotation shaft to improve the sealing performance of the gate valve.

Further, to prevent failure of the rope, counterweight or pulley system, etc. in a single counterweight assembly, the gate valve may be configured to include a plurality of counterweight assemblies 40 to improve the safety of the gate valve. Specifically, in the present invention, a plurality of weight members 40 are provided at intervals on the shutter plate 30, the plurality of weight members 40 are connected to the shutter plate 30, and the traction force provided by any one of the weight members 40 is greater than the self weight of the shutter plate 30. Furthermore, in the present invention, the same counterweight can also be made to produce more traction by increasing the ratio of the outer sheave diameter to the inner sheave diameter.

Further, in the present invention, in order to ensure the smoothness and safety of the vehicle operation, the gate valve may be configured to further include a rail sealing member 50 and an inflating member 60, the rail sealing member 50 being disposed at the bottom of the gate 30, the rail sealing member 50 being for sealing engagement with a rail of the vacuum pipe structure, the rail sealing member 50 having a cavity 50 a; the inflation element 60 is in communication with the cavity 50a of the rail sealing element 50, and the inflation element 60 is configured to inflate into the cavity 50a to effect the rail sealing element 50 in sealing engagement with the rail of the vacuum duct structure.

Under the configuration mode, when the gate valve is closed, the opening and closing mechanism drives the gate plate to move so that the rail sealing element is attached to the horizontal plane of the rail of the vacuum pipeline structure, and the inflation element inflates high-pressure air with certain pressure into the cavity of the rail sealing element so that the rail sealing element is closely attached to the matching area of the rail sealing element on the rail structure, so that sealing between the gate valve and the rail can be realized without disconnecting the rail, and the running stability and safety of a vehicle are ensured.

Further, in the present invention, in order to achieve a sealing fit between the gate valve and the vacuum pipe structure, the gate valve may be configured to further include a pipe sealing element 70, the pipe sealing element 70 being disposed at a side of the gate 30, the pipe sealing element 70 being for sealing fit with the vacuum pipe structure.

As an embodiment of the present invention, as shown in fig. 9 and 10, the gate valve includes two pipe sealing members 70, the two pipe sealing members 70 being respectively disposed at the first side and the second side of the gate 30, and both the pipe sealing members 70 being adapted to be in sealing engagement with the vacuum pipe structure. In this embodiment, the close contact between the pipe sealing element 70 on the gate 30 and the pipe sealing element fitting region on the vacuum pipe structure is naturally achieved by the lateral pressure formed by the huge pressure difference between the two sides of the gate, and it should be noted that the pipe sealing element fitting region on the pipe structure is formed by breaking the upper steel structure region of the vacuum pipe structure to form a fracture, and then performing a certain welding process. In fact, the upper steel structural area can be broken because there are no coils and no support wheel tracks. When the vacuum pipeline works normally, the gate valve is in an open state and is arranged between fractures of the vacuum pipeline structure to complete the sealing of the vacuum pipeline structure; when the vacuum pipeline of a certain section needs to be maintained, the flashboard moves downwards under the action of the opening and closing mechanism until the rail sealing element is attached to the rail of the vacuum pipeline structure.

Further, in the present invention, in order to achieve tight fitting of the rail sealing member with the rail sidewall horizontal plane, the rail sidewall vertical plane and the rail bottom plane, respectively, as shown in fig. 6, the rail sealing member 50 may be configured to include a first sealing section 51, a second sealing section 52, a third sealing section 53, a fourth sealing section 54 and a fifth sealing section 55 connected in sequence, the first sealing section 51, the third sealing section 53 and the fifth sealing section 55 are horizontally disposed, the second sealing section 52 and the fourth sealing section 54 are vertically disposed, the first sealing section 51 and the fifth sealing section 55 are respectively fitted with the rail sidewall horizontal plane of the vacuum pipe structure, the second sealing section 52 and the fourth sealing section 54 are respectively fitted with the rail sidewall vertical plane of the vacuum pipe structure, the third sealing section 53 is fitted with the rail bottom plane of the vacuum pipe structure, the first sealing section 51, the second sealing section 52, the first sealing section 52, the second sealing section 52, and the fifth sealing section 55 are respectively fitted with the rail sidewall vertical plane of the vacuum pipe structure, the third sealing section 53 is fitted with the rail bottom plane of the vacuum pipe structure, and the first sealing section 51, the second sealing section 52, the third sealing section 54, and the third sealing section is fitted with the vacuum pipe structure, and the vacuum pipe structure are respectively, and the vacuum pipe structure are formed by the vacuum pipe structure, and the vacuum pipe structure are formed by the vacuum pipe structure, and the vacuum pipe structure are formed by the vacuum pipe structure, and the vacuum pipe structure are formed by the vacuum pipe structure, and the vacuum, The third seal segment 53, the fourth seal segment 54 and the fifth seal segment 55 each have a cavity 50 a.

Furthermore, considering the specific structural form of the rail, in order to realize that the rail sealing element is matched with the wheel rail level and the rail bottom level of the rail structure, the third sealing section 53 may be configured to include a wheel rail sealing surface 531 and a rail bottom sealing surface 532, the wheel rail sealing surface 531 and the rail bottom sealing surface 532 are arranged in a step, the wheel rail sealing surface 531 is used for being matched with the wheel rail level 110 of the vacuum pipeline structure, and the rail bottom sealing surface 532 is used for being matched with the rail bottom level 120 of the vacuum pipeline structure.

By applying the configuration mode, the third sealing section 53 is configured to include the wheel rail sealing surface 531 and the rail bottom sealing surface 532, cavities are arranged in the wheel rail sealing surface 531 and the rail bottom sealing surface 532, when the gate valve is closed, the wheel rail sealing surface 531 is matched with the wheel rail horizontal plane of the vacuum pipeline structure, the rail bottom sealing surface 532 is matched with the rail bottom horizontal plane of the vacuum pipeline structure, and the inflation element fills high-pressure air with a certain pressure into the cavities of the wheel rail sealing surface 531 and the rail bottom sealing surface 532, so that the rail sealing element can be tightly attached to the rail structure.

As an embodiment of the present invention, the close contact between the rail sealing member 50 and the mating region of the rail sealing member on the rail is complicated, wherein the close contact between the rail bottom horizontal plane, the side wall horizontal plane, and the equal horizontal plane of the support wheel horizontal plane (fig. 11) on the rail is achieved by the vertical pressure applied to the shutter by the shutter opening and closing mechanism, and the close contact between the vertical plane of the side wall and all the right-angled edges is achieved by the pressure of the high-pressure air charged into the cavity 50a in the rail sealing member 50. To achieve a snug fit at the right angle edge, a right angle edge of the mating area of the sealing element on the rail may be rounded 100, as shown in particular in fig. 11.

Further, in the present invention, in order to ensure that the gate valve does not open erroneously in any case, the gate valve may be configured to further include a locking mechanism 80, the locking mechanism 80 being provided on the base 10, the gate 30 having a catching groove 30a, the locking mechanism 80 being configured to cooperate with the catching groove 30a when the gate 30 moves to the set position to achieve locking of the gate 30 and the base 10 in the gate closed state. Here, when the shutter 30 moves to the set position, the rail sealing member 50 of the bottom of the shutter 30 is in sealing engagement with the rail.

By applying the configuration mode, when the gate valve is in a closed state, the mechanical locking mechanism is matched with the clamping groove on the gate plate to automatically lock the gate plate, the accidental opening of the gate plate caused by human misoperation or equipment failure and other reasons is effectively avoided, and the safety of maintenance operators or escape passengers in the pipeline is protected.

In order to further improve the safety redundancy, the gate valve may be configured to include a plurality of locking mechanisms 80, the plurality of locking mechanisms 80 are arranged on the base 10 at intervals, the gate 30 has a plurality of slots 30a, and the plurality of locking mechanisms 80 are arranged in one-to-one correspondence with the plurality of slots 30 a; when the shutter 30 moves to the set position, the locking mechanisms 80 are matched with the locking slots 30a in a one-to-one correspondence manner to lock the shutter 30 and the base 10.

As an embodiment of the present invention, as shown in fig. 6, the locking mechanism 80 includes a spring 81 and a catch 82, one end of the spring 81 is fixedly disposed on the base 10, one end of the catch 82 is rotatably disposed on the base 10, and the other end of the spring 81 is connected to the other end of the catch 82. In this embodiment, when the vacuum pipe of a certain section needs to be repaired, the shutter is driven by the opening and closing mechanism of the gate valve of the section to move downward in the vertical direction, and when the shutter 30 moves to the set position, the catch 82 enters the catch groove 30a of the shutter 30, thereby achieving the locking of the shutter 30 with the base 10. When the pipeline maintenance operation is finished or passengers escape from the pipeline, the mechanical locking mechanism is manually operated to unlock the pipeline, then the high-pressure air in the cavity 50a of the track sealing element 50 is discharged through the inflating element, then the gate valve opening and closing mechanism 20 is operated to lift the gate valve, and the whole opening action is finished.

Further, in the present invention, in view of the cost of the apparatus and the compactness, the opening and closing mechanism 20 may be configured to include a telescopic cylinder connected to the shutter 30. As a specific embodiment of the invention, when a section of vacuum pipeline needs to be maintained, the telescopic cylinder of the gate valve of the section is extended to drive the gate to move downwards along the vertical direction until the gate is tightly matched with the track, and when the pipeline maintenance operation is finished or passengers escape through the pipeline, the telescopic cylinder of the gate valve of the section is retracted to drive the gate to move upwards along the vertical direction until the gate is separated from the vacuum pipeline, so that the train returns to normal operation.

According to another aspect of the present invention there is provided a vacuum conduit comprising a vacuum conduit structure and a frangible gate valve as described above, the base 10 of the frangible gate valve being fixedly disposed on the vacuum conduit structure. Because the gate valve adopts the design concepts of 'fragile' and 'failure guide safety', when the gate opening and closing mechanism fails, the gate can be ensured not to fall off by using the counterweight component, which is equivalent to adding a layer of safety redundancy on the basis of the 'fragile' gate, so that the safety of the gate valve and a high-speed running train can be improved. The gate valve disclosed by the invention is applied to a vacuum pipeline, so that the working performance of the vacuum pipeline can be greatly improved.

For a further understanding of the present invention, the frangible gate valve of the present invention will now be described in detail with reference to fig. 1 to 11.

As shown in fig. 1 to 11, according to the embodiment of the present invention, there is provided a frangible gate valve comprising a base 10, an opening and closing mechanism 20, a gate 30, two weight assemblies 40, a rail sealing member 50, an inflating member 60, a pipe sealing member 70 and a locking mechanism 80, wherein the gate 30 comprises a frangible region 31, an impact region 31 and a non-frangible region 31, the frangible region 31 is used for breaking to protect a train when the gate valve is in failure and collides with the train and is capable of withstanding atmospheric pressure difference when the gate valve is not in normal operation and collides with the train, and the impact region 32 is used for ensuring the frangibility of the frangible region 31 when the gate valve collides with the train. The opening and closing mechanism 20 is disposed on the base 10, the shutter 30 is connected with the opening and closing mechanism 20, the opening and closing mechanism 20 is used for driving the shutter 30 to move to realize the opening and closing of the vacuum pipeline structure, the track sealing element 50 is disposed at the bottom of the shutter 30, the counterweight assembly 40 is connected with the shutter 30, the counterweight assembly 40 is used for providing traction force to prevent the shutter 30 from freely falling caused by the failure of the opening and closing mechanism 20, and the traction force provided by the counterweight assembly 40 is greater than the self weight of the shutter 30.

As shown in fig. 1 to fig. 3, the gate valve is normally in an open state to allow a train to pass through, when a certain section of pipeline needs to be maintained, the gate valve at both ends of the section of pipeline needs to be closed, the closing action is executed by the gate opening/closing mechanism 20, and when the pipeline is closed in place, the locking mechanism 80 on the outer frame of the gate valve is inserted into the slot 30a on the gate, so as to form a reliable mechanical lock. The cavity 50a of the rail sealing member 50 is then filled with high-pressure air at a certain pressure through the air filling member 60, and the entire closing action is finished.

In this embodiment, an outer frame is used as the base 10, an inflation tube is used as the inflation element, and the gate valve is tightly attached to the pipe sealing element 70 and the rail sealing element 50 on the gate 30 to seal with the sealing element fitting region on the pipe structure and the sealing element fitting region on the rail structure, respectively.

The close contact between the pipe sealing element 70 on the gate plate 30 and the pipe sealing element fitting region on the vacuum pipe structure is naturally achieved by the lateral pressure formed by the huge pressure difference on the two sides of the gate plate, and it should be noted that the pipe sealing element fitting region on the pipe structure is formed by breaking the upper steel structure region of the vacuum pipe structure to form a fracture, and then performing certain welding processing. In fact, the upper steel structure area can be disconnected because there are no coils and support wheel tracks. When the vacuum pipeline works normally, the gate valve is in an open state and is arranged between fractures of the vacuum pipeline structure to complete the sealing of the vacuum pipeline structure; when the vacuum pipeline of a certain section needs to be maintained, the flashboard moves downwards under the action of the opening and closing mechanism until the rail sealing element is attached to the rail of the vacuum pipeline structure.

The process of achieving a tight fit of the rail sealing element 50 to the mating area of the rail sealing element on the rail is complicated, wherein the tight fit of the rail foot level, the side wall level, the equal level of the support wheel level on the rail (fig. 6) is achieved by the vertical pressure exerted on the gate by the gate opening and closing mechanism, and the tight fit of the side wall vertical surface and all right-angled edges is achieved by the pressure of the high pressure air charged into the cavity 50a in the rail sealing element 50. To achieve a snug fit at the right angle edge, a right angle edge of the mating area of the sealing element on the rail may be rounded 100, as shown in particular in fig. 11.

The gate plate of the gate valve in the embodiment is not inserted into the track, but sealed by using vertical mechanical pressure and air pressure in a cavity in the sealing element, the sealing matching area on the track is not damaged, the electric coil 130 on the track is not disconnected, and the running stability and safety of the vehicle are ensured.

In addition, the gate valve is provided with the mechanical locking mechanism 80 on the outer frame of the gate valve, when the gate valve is in a closed state, the mechanical locking mechanism 80 automatically locks the gate valve, the accidental opening of the gate valve caused by human misoperation or equipment failure and the like is effectively avoided, and the safety of maintenance operators or escape passengers in the pipeline is protected. In order to further improve the safety redundancy, two or more sets of mechanical locking mechanisms can be designed on the gate valve.

When the pipeline maintenance operation is finished or passengers escape from the pipeline, the mechanical locking mechanism is manually operated to unlock the pipeline, then high-pressure air in the cavity 50a of the track sealing element 50 is discharged through the inflation tube, then the gate valve opening and closing mechanism 20 is operated to lift the gate valve, and the whole opening action is finished.

When the flashboard valve itself breaks down, for example, the closing mechanism is out of order under the circumstances such as power failure, stop gas, flashboard 30 can not drop owing to receive the traction effect of first haulage rope 45, and the traction force of first haulage rope 45 to flashboard 30 is provided by first balancing weight 42 and second balancing weight 49 simultaneously, the traction force that first balancing weight 42 provided passes through second haulage rope 46, second pulley 44, first pulley 43 transmits and comes, the traction force that the second balancing weight provided passes through third haulage rope 48, third pulley 47, first pulley 43 transmits and comes, this kind of mode can improve pivot 41 pivoted stationarity, and then improve the stationarity of power transmission.

In order to prevent the rope, counterweight and pulley system in the counterweight assembly from malfunctioning, a plurality of sets of counterweight assemblies can be designed, wherein the traction force provided by each set of counterweight assemblies is enough to offset the dead weight of the gate, and in addition, the ratio of the diameters of the outer pulleys and the inner pulleys can be increased to enable the same counterweight to generate larger traction force.

Since the inner and outer pulleys are located inside and outside the outer frame, respectively, and there is an atmospheric pressure difference between the inside and outside of the outer frame, the bearing sealing member 401 is designed on the pulley bearing.

As a final layer of safety redundancy design, the gate plate of the gate valve of the present embodiment adopts a "fragile design", and the gate plate structure is made of brittle materials such as glass and carbon fiber, so that the whole gate plate structure can adopt the brittle materials, and the area on the gate plate, which is located in the section of the vacuum pipeline, can be designed as the fragile area 31.

The 'fragile' gate plate structure has certain strength design requirements, can bear the pressure difference of about one atmosphere of the 'fragile' gate plate structure in normal use, but can be instantaneously crushed when colliding with a high-speed running train without generating structural damage which influences the air tightness of the train structure. To compromise the strength of the ram structure and the "fragility" upon impact, the central region of the ram structure is further designed as an impact zone 32.

In conclusion, the invention provides the fragile gate valve, compared with the prior art, the gate plate adopts the fragile design, and is instantaneously crushed when colliding with a train running at high speed, so that the structure damage which endangers the air tightness safety can not be caused to the train structure; the gate valve adopts a design concept of 'failure guide safety', and when the gate actuating mechanism fails, the gate is ensured not to fall off by using a fixed pulley system and a counterweight; meanwhile, the gate valve can be sealed without disconnecting the lower rail, and the running stability and safety of the vehicle are ensured. In addition, the gate valve is specially designed with a mechanical locking mechanism, and the mechanical locking mechanism can ensure that the gate valve cannot be opened by mistake under any condition, so that the safety of personnel entering the pipeline is ensured.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A frangible gate valve, comprising:

a base (10);

an opening/closing mechanism (20), the opening/closing mechanism (20) being provided on the base (10);

a shutter (30), wherein the shutter (30) is connected with the opening and closing mechanism (20), the opening and closing mechanism (20) is used for driving the shutter (30) to move so as to realize the opening and closing of the vacuum pipeline structure, and the shutter (30) comprises a fragile area (31);

when the flashboard (30) collides with a train, the fragile zone (31) is broken instantaneously to avoid the damage to the train caused by the impact force; when the flashboard (30) works normally, the flashboard (30) can bear the atmospheric pressure difference on two sides of the flashboard; the gate plate (30) further comprises an impact area (32), the impact area (32) is arranged in the middle of the gate plate (30) and is located in the area where the impact area collides with the tip of a train head, the impact area (32) is connected with the fragile area (31), the strength of the impact area (32) is smaller than that of the fragile area (31), and the impact area (32) is used for ensuring the fragility of the fragile area (31) when the gate plate valve collides with a train; the gate valve further comprises a counterweight assembly (40), wherein the counterweight assembly (40) is connected with the gate plate (30), the counterweight assembly (40) is used for providing traction force to prevent the gate plate (30) from freely falling caused by the failure of the opening and closing mechanism (20), and the traction force provided by the counterweight assembly (40) is greater than the self weight of the gate plate (30).

2. The frangible gate valve according to claim 1, wherein the weight assembly (40) comprises a rotating shaft (41), a first weight block (42), a first pulley (43), a second pulley (44), a first pulling rope (45) and a second pulling rope (46), the rotating shaft (41) is rotatably disposed on the base (10), the first pulley (43) and the second pulley (44) are disposed on the rotating shaft (41), two ends of the first pulling rope (45) are respectively connected with the first pulley (43) and the gate (30), and two ends of the second pulling rope (46) are respectively connected with the second pulley (44) and the first weight block (42).

3. The frangible gate valve according to claim 2, wherein the weight assembly (40) further comprises a third pulley (47), a third traction rope (48) and a second counterweight (49), the first pulley (43) and the gate (30) being disposed inside the base (10), the second pulley (44) and the third pulley (47) being disposed outside the base (10) and at both ends of the rotating shaft (41), the first pulley (43) being disposed between the second pulley (44) and the third pulley (47), both ends of the third traction rope (48) being connected with the third pulley (47) and the second counterweight (49), respectively.

4. The frangible gate valve according to any one of claims 1 to 3, further comprising a rail sealing element (50) and an inflation element (60), the rail sealing element (50) being disposed at a bottom of the gate (30), the rail sealing element (50) being for sealing engagement with a rail of a vacuum pipe structure, the rail sealing element (50) having a cavity (50 a); the inflation element (60) is communicated with the cavity (50a) of the track sealing element (50), and the inflation element (60) is used for inflating the cavity (50a) to realize the track sealing element (50) and the track sealing matching of the vacuum pipeline structure.

5. The frangible gate valve according to claim 4, further comprising a pipe sealing element (70), the pipe sealing element (70) being disposed at a side of the gate (30), the pipe sealing element (70) being for sealing engagement with a vacuum pipe structure.

6. The frangible gate valve according to claim 5, wherein the track sealing element (50) includes a first sealing section (51), a second sealing section (52), a third sealing section (53), a fourth sealing section (54), and a fifth sealing section (55) connected in sequence, the first sealing section (51), the third sealing section (53), and the fifth sealing section (55) are horizontally disposed, the second sealing section (52) and the fourth sealing section (54) are vertically disposed, the first sealing section (51) and the fifth sealing section (55) are respectively fitted with a horizontal plane of a track sidewall of the vacuum pipe structure, the second sealing section (52) and the fourth sealing section (54) are respectively fitted with a vertical plane of a track sidewall of the vacuum pipe structure, the third sealing section (53) is fitted with a bottom plane of a track of the vacuum pipe structure, the first seal section (51), the second seal section (52), the third seal section (53), the fourth seal section (54) and the fifth seal section (55) each have the cavity (50 a).

7. The frangible gate valve according to any one of claims 1 to 3, further comprising a locking mechanism (80), the locking mechanism (80) being provided on the base (10), the gate (30) having a catch (30a), the locking mechanism (80) being adapted to cooperate with the catch (30a) when the gate (30) is moved to a set position to effect locking of the gate (30) to the base (10) in a gate closed state.

8. Vacuum pipe, characterized in that it comprises a vacuum pipe structure and a frangible gate valve according to any one of claims 1 to 7, the base (10) of which is fixedly arranged on the vacuum pipe structure.

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