CN112109745A - Gate valve capable of realizing sealing by utilizing air pressure of cavity and vacuum pipeline with gate valve - Google Patents
Gate valve capable of realizing sealing by utilizing air pressure of cavity and vacuum pipeline with gate valve Download PDFInfo
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- CN112109745A CN112109745A CN201910530364.3A CN201910530364A CN112109745A CN 112109745 A CN112109745 A CN 112109745A CN 201910530364 A CN201910530364 A CN 201910530364A CN 112109745 A CN112109745 A CN 112109745A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
- B61B13/00—Other railway systems
- B61B13/10—Tunnel systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
- B61B13/00—Other railway systems
- B61B13/08—Sliding or levitation systems
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Abstract
The invention provides a gate valve for realizing sealing by utilizing cavity air pressure and a vacuum pipeline with the gate valve. By applying the technical scheme of the invention, the technical problems of poor running stability and poor safety of the vehicle caused by the fact that the gate valve needs to be sealed and the track needs to be disconnected in the prior art are solved.
Description
Technical Field
The invention relates to the technical field of magnetic suspension vacuum pipeline traffic systems, in particular to a gate valve for realizing sealing by utilizing cavity air pressure and a vacuum pipeline with the gate valve.
Background
In order to reduce air resistance when the vehicle runs at high speed, the vehicle runs in a vacuum pipeline. The lower part of the vacuum pipeline is a track for the vehicle to run, an electric coil is installed on the side wall of the track to provide suspension force and guiding force for the vehicle, and a supporting wheel track for the supporting wheel to run is further designed at the bottom of the track, as shown in fig. 8 and 9.
In order to facilitate maintenance, a whole 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 maintained, gate valves at two ends of the section are closed in advance, and then the atmospheric pressure is restored for the section, so that one side of the gate valve is vacuum and the other side of the gate valve is atmospheric pressure, and the gate valve needs to have enough strength and good air tightness.
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. 10 to 14.
Fig. 10 and 11 show the overall structure of a gate valve of the prior art, which consists of three major parts: gate valve outer frame, closing mechanism, flashboard. The outer frame of the gate valve and the pipeline are welded into an integrated air-tight structure, the telescopic cylinder and the gate are installed in the outer frame, the extension and retraction of the telescopic cylinder correspond to the closing and opening of the gate valve, when the gate valve is opened, a train is allowed to normally pass, and when the gate valve is closed, the atmospheric pressure can be recovered to the corresponding pipeline section, so that the maintenance or other work can be carried out (in fig. 10 and 11, the telescopic cylinder is in the retraction state, and the gate is in the opening state).
Fig. 12 and 13 show a prior art gate plate structure, in which lateral sealing rubbers are designed on the left and right sides of the gate plate to ensure airtightness, and the lateral sealing rubbers are respectively tightly fitted with lateral sealing rubber fitting areas on a metal pipeline to realize sealing. 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 structure of the existing structure has the following technical disadvantages.
First, since the gate valve is closed from top to bottom, the sealing of the horizontal plane of the upper side wall of the rail, the horizontal plane of the rail bottom and the horizontal plane of the supporting wheel rail is very easy to achieve (fig. 14), while the sealing of the vertical plane of the upper side wall of the rail and the right-angled edges is very difficult to achieve. Therefore, in the prior art, the rail bottom and the rail side wall of the lower rail are disconnected to a certain depth (fig. 15), so that the gate valve is inserted, and the side surface of the gate is tightly contacted 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 10 and 11), the stability and the comfort of the train operation are influenced, and the potential safety hazard of the train operation can be caused.
Second, do not design the mechanical locking mechanism of slide valve in the current design, when a certain district section that needs to the vacuum pipe overhauls, close the slide valve at this district section both ends, resume an atmospheric pressure, then personnel get into this district section and carry out work, can not get rid of the opening and closing mechanism of the slide valve of this district section both sides because gas leakage, artificial maloperation or other reasons open, this district section is then in the twinkling of an eye with the vacuum environment UNICOM of both sides, the staff who carries out maintenance work to entering the repressing section causes very big potential safety hazard.
Disclosure of Invention
The invention provides a gate valve for realizing sealing by utilizing cavity air pressure and a vacuum pipeline with the gate valve, which can solve the technical problems of poor running stability and safety of a vehicle caused by the fact that the gate valve needs to be sealed by disconnecting a track in the prior art.
According to an aspect of the present invention, there is provided a gate valve sealed by air pressure of a cavity, the gate valve including: a base; the opening and closing mechanism is arranged on the base; the gate plate is connected with the opening and closing mechanism, and 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; the track sealing element is arranged at the bottom of the flashboard and 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; and the inflation element is communicated with the cavity of the track sealing element and is used for inflating the cavity so as to realize the track sealing element and the track sealing fit of 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.
Furthermore, the third sealing section comprises a wheel rail sealing surface and a rail bottom sealing surface, the wheel rail sealing surface and the rail bottom sealing surface are arranged in a ladder mode, the wheel rail sealing surface is used for being matched with a wheel rail horizontal plane of the vacuum pipeline structure, and the rail bottom sealing surface is used for being matched with a rail bottom horizontal plane of the vacuum pipeline structure.
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.
Furthermore, the gate valve comprises a plurality of locking mechanisms, the locking mechanisms are arranged on the base at intervals, the gate plate is provided with a plurality of clamping grooves, and the locking mechanisms and the clamping grooves are arranged in one-to-one correspondence; when the flashboard moves to a set position, the plurality of locking mechanisms and the plurality of clamping grooves are matched in a one-to-one correspondence mode to achieve locking of the flashboard and the base.
Further, locking mechanism includes spring and buckle, and the one end of spring is fixed to be set up on the base, and the one end of buckle rotationally sets up on the base, and the other end of spring is connected with the other end of buckle.
Further, the gate valve includes two pipeline sealing element, and two pipeline sealing element set up respectively in the first side and the second side of flashboard, and two pipeline sealing element all are used for with the sealed cooperation of vacuum pipeline structure.
Further, the opening and closing mechanism comprises a telescopic cylinder, and the telescopic cylinder is connected with the flashboard.
According to another aspect of the present invention, there is provided a vacuum pipe comprising a vacuum pipe structure and a gate valve as described above sealed by air pressure of a cavity, a base of the gate valve being fixedly disposed on the vacuum pipe structure.
The gate valve adopts a track sealing element with a cavity, when the gate valve is closed, a switching mechanism drives a gate to move so as to enable the track sealing element to be attached to the horizontal plane of a track of a vacuum pipeline structure, and an inflating element fills high-pressure air with certain pressure into the cavity of the track sealing element so as to enable the track sealing element to be closely attached to a matching area of the track sealing element on the track structure, so that sealing between the gate valve and the track can be realized under the condition of not opening the track, and the running stability and safety of a vehicle are 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 gate valve with a cavity gas pressure seal in an open state, according to an embodiment of the present invention;
FIG. 2 shows a side view of the gate valve provided in FIG. 1 with the cavity gas pressure sealed in an open condition;
FIG. 3 illustrates a cross-sectional view of a gate valve with a cavity gas pressure seal in a closed state, according to an embodiment of the present invention;
FIG. 4 shows a side view of the gate valve provided in FIG. 3 with the cavity air pressure enabled for sealing in a closed state;
FIG. 5 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. 6 shows a side view of the gate, pipe seal element and rail seal element assembly provided in FIG. 5;
FIG. 7 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. 8 shows a cross-sectional view of a rail of a vacuum duct structure provided in the prior art;
FIG. 9 shows a side view of a rail of the vacuum duct structure provided in FIG. 8;
FIG. 10 illustrates a cross-sectional view of a gate valve structure provided in the prior art;
FIG. 11 shows a side view of the gate valve structure provided in FIG. 10;
FIG. 12 illustrates a cross-sectional view of a gate used in a gate valve structure provided in the prior art;
FIG. 13 shows a side view of a gate for use with the gate valve structure provided in FIG. 12;
FIG. 14 shows a cross-sectional view of a track structure provided in the prior art;
fig. 15 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; 30a, a card slot; 40. a rail sealing element; 40a, a cavity; 41. a first seal section; 42. a second seal section; 43. a third seal section; 431. a wheel-rail sealing surface; 432. a rail foot sealing surface; 44. a fourth seal section; 45. a fifth seal section; 50. an inflation element; 60. a pipe sealing element; 70. a locking mechanism; 71. a spring; 72. 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.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1 to 6, according to a specific embodiment of the present invention, there is provided a gate valve for sealing by using air pressure of a cavity, the gate valve including a base 10, an opening and closing mechanism 20, a gate 30, a rail sealing member 40 and an inflating member 50, the opening and closing mechanism 20 being disposed on the base 10, the gate 30 being connected to the opening and closing mechanism 20, the opening and closing mechanism 20 being used for driving the gate 30 to move to open and close a vacuum pipe structure, the rail sealing member 40 being disposed at a bottom of the gate 30, the rail sealing member 40 being used for sealing engagement with a rail of the vacuum pipe structure, the rail sealing member 40 having a cavity 40a, the inflating member 50 being in communication with the cavity 40a of the rail sealing member 40, and the inflating member 50 being used for inflating the cavity 40a to achieve sealing engagement of the rail sealing member 40 with the vacuum.
The gate valve is provided with a track sealing element with a cavity, when the gate valve is closed, the opening and closing mechanism drives the gate plate to move so as to enable the track sealing element to be attached to the horizontal plane of the track of the vacuum pipeline structure, and the inflating element fills high-pressure air with certain pressure into the cavity of the track sealing element so as to enable the track sealing element to be closely attached to the matching area of the track sealing element on the track structure, so that sealing between the gate valve and the track can be realized under the condition of not breaking the track, and the running stability and safety of vehicles 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 member 60, the pipe sealing member 60 being disposed at a side of the gate 30, the pipe sealing member 60 being for sealing fit with the vacuum pipe structure.
As an embodiment of the present invention, as shown in fig. 5 and 6, the gate valve includes two pipe sealing members 60, the two pipe sealing members 60 are respectively disposed at the first side and the second side of the gate 30, and both the pipe sealing members 60 are used for sealing engagement with the vacuum pipe structure. In this embodiment, the close contact between the pipe sealing element 60 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 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.
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. 3, the rail sealing member 40 may be configured to include a first sealing section 41, a second sealing section 42, a third sealing section 43, a fourth sealing section 44 and a fifth sealing section 45 connected in sequence, the first sealing section 41, the third sealing section 43 and the fifth sealing section 45 are horizontally disposed, the second sealing section 42 and the fourth sealing section 44 are vertically disposed, the first sealing section 41 and the fifth sealing section 45 are respectively fitted with the rail sidewall horizontal plane of the vacuum pipe structure, the second sealing section 42 and the fourth sealing section 44 are respectively fitted with the rail sidewall vertical plane of the vacuum pipe structure, the third sealing section 43 is fitted with the rail bottom plane of the vacuum pipe structure, the first sealing section 41, the second sealing section 42, the third sealing section 42, the fifth sealing section 45, and the fifth sealing section 45 are respectively fitted with the rail sidewall, The third seal segment 43, the fourth seal segment 44 and the fifth seal segment 45 each have a cavity 40 a.
Furthermore, considering the specific configuration of the rail, in order to realize the matching of the rail sealing element with the wheel rail horizontal plane and the rail bottom horizontal plane of the rail structure, the third sealing section 43 may be configured to include a wheel rail sealing surface 431 and a rail bottom sealing surface 432, the wheel rail sealing surface 431 and the rail bottom sealing surface 432 are arranged in a stepped manner, the wheel rail sealing surface 431 is used for matching with the wheel rail horizontal plane of the vacuum pipeline structure, and the rail bottom sealing surface 432 is used for matching with the rail bottom horizontal plane of the vacuum pipeline structure.
By applying the configuration mode, the third sealing section 43 is configured to comprise a wheel rail sealing surface 431 and a rail bottom sealing surface 432, cavities are arranged in the wheel rail sealing surface 431 and the rail bottom sealing surface 432, when the gate valve is closed, the wheel rail sealing surface 431 is matched with a wheel rail horizontal plane of the vacuum pipeline structure, the rail bottom sealing surface 432 is matched with a rail bottom horizontal plane of the vacuum pipeline structure, and the inflation element fills high-pressure air with certain pressure into the cavities of the wheel rail sealing surface 431 and the rail bottom sealing surface 432, 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 40 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. 8) 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 40a in the rail sealing member 40. 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. 7.
Further, in the present invention, in order to ensure that the gate valve cannot be opened erroneously in any situation, the gate valve may be configured to further include a locking mechanism 70, the locking mechanism 70 is disposed on the base 10, the gate 30 has a catching groove 30a, and the locking mechanism 70 is 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 40 of the bottom of the shutter 30 sealingly abuts 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 70, the plurality of locking mechanisms 70 are arranged on the base 10 at intervals, the gate 30 has a plurality of clamping grooves 30a, and the plurality of locking mechanisms 70 are arranged in one-to-one correspondence with the plurality of clamping grooves 30 a; when the shutter 30 moves to the set position, the plurality of locking mechanisms 70 are matched with the plurality of clamping grooves 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. 1, the locking mechanism 70 includes a spring 71 and a catch 72, one end of the spring 71 is fixedly disposed on the base 10, one end of the catch 72 is rotatably disposed on the base 10, and the other end of the spring 71 is connected to the other end of the catch 72. 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 72 enters the catching 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 manual operation mechanical locking mechanism unlocks, then the high-pressure air in the cavity 40a of the track sealing element 40 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 the vacuum pipeline needs to be maintained, the telescopic cylinder of the gate valve of the section extends to drive the gate plate to move downwards along the vertical direction until the gate plate is tightly matched with the track, and when the pipeline maintenance operation is finished or passengers finish escaping through the pipeline, the telescopic cylinder of the gate valve of the section retracts to drive the gate plate to move upwards along the vertical direction until the gate plate 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 pipe comprising a vacuum pipe structure and a gate valve as described above sealed by air pressure of a cavity, a base 10 of the gate valve being fixedly disposed on the vacuum pipe structure. Because the gate valve adopts the track sealing element with the cavity, when the gate valve is closed, the opening and closing mechanism drives the gate to move so as to enable the track sealing element to be attached to the horizontal plane of the track of the vacuum pipeline structure, and the inflating element fills high-pressure air with certain pressure into the cavity of the track sealing element so as to enable the track sealing element to be closely attached to the matching area of the track sealing element on the track structure, the sealing between the gate valve and the track can be realized under the condition of not disconnecting the track, and the running stability and safety of a vehicle are ensured. Therefore, the gate valve provided by the invention is applied to the vacuum pipeline, so that the working performance of the vacuum pipeline can be greatly improved.
For a further understanding of the present invention, the gate valve using the cavity gas pressure for sealing according to the present invention will be described in detail with reference to fig. 1 to 6.
As shown in fig. 1 to 6, according to an embodiment of the present invention, there is provided a gate valve for sealing by using air pressure of a cavity, the gate valve including a base 10, an opening and closing mechanism 20, a gate 30, a rail sealing member 40, an inflating member 50, a pipe sealing member 60, and a locking mechanism 70, the opening and closing mechanism 20 being disposed on the base 10, the gate 30 being connected to the opening and closing mechanism 20, the opening and closing mechanism 20 being used to drive the gate 30 to move to open and close a vacuum pipe structure, and the rail sealing member 40 being disposed at a bottom of the gate 30.
The track sealing element 40 comprises a first sealing section 41, a second sealing section 42, a third sealing section 43, a fourth sealing section 44 and a fifth sealing section 45 which are connected in sequence, the first sealing section 41, the third sealing section 43 and the fifth sealing section 45 are horizontally arranged, the second sealing section 42 and the fourth sealing section 44 are vertically arranged, the first sealing section 41 and the fifth sealing section 45 are respectively matched with a horizontal plane of a track side wall of the vacuum pipeline structure, the second sealing section 42 and the fourth sealing section 44 are respectively matched with a vertical plane of the track side wall of the vacuum pipeline structure, the third sealing section 43 is matched with a track bottom surface of the vacuum pipeline structure, and the first sealing section 41, the second sealing section 42, the third sealing section 43, the fourth sealing section 44 and the fifth sealing section 45 are provided with a cavity 40 a. The third sealing section 43 comprises a wheel-rail sealing surface 431 and a rail-bottom sealing surface 432, the wheel-rail sealing surface 431 and the rail-bottom sealing surface 432 are arranged in a stepped manner, the wheel-rail sealing surface 431 is used for being matched with a wheel-rail horizontal plane of the vacuum pipeline structure, and the rail-bottom sealing surface 432 is used for being matched with a rail-bottom horizontal plane of the vacuum pipeline structure.
The inflation element 50 is connected to the cavity 40a of the rail sealing element 40, and the inflation element 50 is used to inflate into the cavity 40a to achieve rail sealing engagement of the rail sealing element 40 with the vacuum duct structure.
As shown in fig. 1 and 2, the gate valve is normally opened to allow the train to pass through, and when a certain section of pipeline needs to be repaired, the gate valve at both ends of the section of pipeline needs to be closed, and the closing operation is performed by the gate opening/closing mechanism 20, and when the closing operation is completed, the locking mechanism 70 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 40a of the rail sealing member 40 is then filled with high-pressure air at a certain pressure through the air filling member 50, and the entire closing action is ended.
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 sealed by tightly fitting the pipe sealing element 60 and the rail sealing element 40 on the gate 30 to 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 60 on the gate 30 and the pipe sealing element fitting area on the vacuum pipe structure is naturally achieved by the lateral pressure formed by the huge air pressure difference on the two sides of the gate, and it should be noted that the pipe sealing element fitting area on the pipe structure is formed by breaking the upper steel structure area 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 seal 40 to the mating area of the rail seal on the rail is complicated, where the tight fit of the rail foot level, the side wall level, the equal level of the support wheel level (fig. 8) on the rail is achieved by the vertical pressure exerted on the gate by the gate opening and closing mechanism, and the tight fit of the vertical side wall and all right-angled edges is achieved by the pressure of the high pressure air charged into the cavity 40a in the rail seal 40. 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. 7.
The gate plate of the gate valve in the embodiment is not inserted into the track, sealing is realized by utilizing vertical mechanical pressure and air pressure in a cavity in the sealing element, any damage to a sealing matching area on the track is avoided, and the running stability and safety of the vehicle are ensured.
In addition, the gate valve is provided with the mechanical locking mechanism 70 on the outer frame of the gate valve, when the gate valve is in a closed state, the mechanical locking mechanism 70 automatically locks the gate, so that the accidental opening of the gate 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 manual operation mechanical locking mechanism unlocks, then high-pressure air in the cavity 40a of the track sealing element 40 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.
In conclusion, the invention provides the gate valve for realizing sealing by utilizing the air pressure of the cavity, and compared with the prior art, the gate valve can realize sealing of the gate valve under the condition of not opening the lower rail, so that the running stability and safety of a 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.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
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 (10)
1. The utility model provides an utilize cavity atmospheric pressure to realize sealed slide valve which characterized in that, the slide valve includes:
a base (10);
an opening/closing mechanism (20), the opening/closing mechanism (20) being provided on the base (10);
the shutter (30) is connected with the opening and closing mechanism (20), and 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;
a rail sealing element (40), the rail sealing element (40) being arranged at the bottom of the shutter (30), the rail sealing element (40) being adapted to sealingly cooperate with a rail of a vacuum pipe structure, the rail sealing element (40) having a cavity (40 a);
an inflation element (50), the inflation element (50) being in communication with the cavity (40a) of the rail sealing element (40), the inflation element (50) being configured to inflate into the cavity (40a) to effect rail sealing engagement of the rail sealing element (40) with the vacuum duct structure.
2. The gate valve using cavity air pressure to achieve sealing according to claim 1, further comprising a pipe sealing element (60), the pipe sealing element (60) being disposed at a side of the gate (30), the pipe sealing element (60) being adapted to sealingly engage with a vacuum pipe structure.
3. The gate valve for sealing by using air pressure of a cavity according to claim 2, wherein the rail sealing member (40) comprises a first sealing section (41), a second sealing section (42), a third sealing section (43), a fourth sealing section (44) and a fifth sealing section (45) which are connected in sequence, the first sealing section (41), the third sealing section (43) and the fifth sealing section (45) are horizontally arranged, the second sealing section (42) and the fourth sealing section (44) are vertically arranged, the first sealing section (41) and the fifth sealing section (45) are respectively matched with a horizontal plane of a rail side wall of the vacuum pipeline structure, the second sealing section (42) and the fourth sealing section (44) are respectively matched with a vertical plane of a rail side wall of the vacuum pipeline structure, and the third sealing section (43) is matched with a rail bottom plane of the vacuum pipeline structure, the first seal section (41), the second seal section (42), the third seal section (43), the fourth seal section (44) and the fifth seal section (45) each have the cavity (40 a).
4. The gate valve for sealing by air pressure in a cavity according to claim 3, wherein the third sealing section (43) comprises a wheel rail sealing surface (431) and a rail bottom sealing surface (432), the wheel rail sealing surface (431) and the rail bottom sealing surface (432) are arranged in a step, the wheel rail sealing surface (431) is used for matching with a wheel rail horizontal plane of the vacuum pipeline structure, and the rail bottom sealing surface (432) is used for matching with a rail bottom horizontal plane of the vacuum pipeline structure.
5. A gate valve utilizing cavity air pressure to achieve sealing according to any one of claims 1 to 4, characterized in that the gate valve further comprises a locking mechanism (70), the locking mechanism (70) is arranged on the base (10), the gate (30) is provided with a clamping groove (30a), and the locking mechanism (70) is used for being matched with the clamping groove (30a) when the gate (30) moves to a set position so as to achieve locking of the gate (30) and the base (10) in a gate closing state.
6. The gate valve for realizing sealing by utilizing cavity air pressure as claimed in claim 5, wherein the gate valve comprises a plurality of said locking mechanisms (70), a plurality of said locking mechanisms (70) are arranged on the base (10) at intervals, the gate (30) is provided with a plurality of said slots (30a), a plurality of said locking mechanisms (70) are arranged in one-to-one correspondence with a plurality of said slots (30 a); when the gate plate (30) moves to the set position, the plurality of locking mechanisms (70) and the plurality of clamping grooves (30a) are matched in a one-to-one correspondence mode to achieve locking of the gate plate (30) and the base (10).
7. The gate valve for sealing by air pressure in a cavity according to claim 6, wherein the locking mechanism (70) comprises a spring (71) and a catch (72), one end of the spring (71) is fixedly arranged on the base (10), one end of the catch (72) is rotatably arranged on the base (10), and the other end of the spring (71) is connected with the other end of the catch (72).
8. A gate valve using cavity air pressure for sealing according to any of claims 1-7, characterized in that the gate valve comprises two pipe sealing elements (60), the two pipe sealing elements (60) being arranged on a first side and a second side of the gate (30), respectively, both pipe sealing elements (60) being adapted for sealing engagement with a vacuum pipe structure.
9. The gate valve using air pressure to seal the cavity according to claim 8, wherein the opening and closing mechanism (20) comprises a telescopic cylinder connected to the gate (30).
10. Vacuum pipe, characterized in that it comprises a vacuum pipe structure and a gate valve for sealing by cavity air pressure according to any of claims 1 to 9, the base (10) of which is fixedly arranged on the vacuum pipe structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910530364.3A CN112109745B (en) | 2019-06-19 | 2019-06-19 | Gate valve capable of realizing sealing by utilizing air pressure of cavity and vacuum pipeline with gate valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910530364.3A CN112109745B (en) | 2019-06-19 | 2019-06-19 | Gate valve capable of realizing sealing by utilizing air pressure of cavity and vacuum pipeline with gate valve |
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| Publication Number | Publication Date |
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| CN112109745A true CN112109745A (en) | 2020-12-22 |
| CN112109745B CN112109745B (en) | 2021-11-12 |
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| CN201910530364.3A Active CN112109745B (en) | 2019-06-19 | 2019-06-19 | Gate valve capable of realizing sealing by utilizing air pressure of cavity and vacuum pipeline with gate valve |
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| CN112109745B (en) | 2021-11-12 |
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