High iron sand injection port structure

Abstract

The present application relates to high iron sand injection technical field, specifically to a kind of high iron sand injection port structure, including enclosure, outer closed unit, inner closed unit, cooperation assembly, sealing plate three and locking assembly.In the present application, when not injecting sand, form inner closed by sealing plate two, when inserting sand injection pipe, form outer closed by sand injection pipe and sealing plate one together, when injecting sand, form inner closed by sealing plate three blocking through pipe, so that sand box is always separated from external space and closed in the whole process of injecting sand and normal running state of high iron, ensure that the dry degree of sand in sand box meets the use requirement.In the present application, during the operation process of injecting sand, only need to insert sand injection pipe manually, cooperate with small amplitude rotation locking, and guide movement by cooperation assembly during the process of inserting pipe, operation step is simple and easy to operate, improve the efficiency when repeatedly operating.

Description

Technical Field

[0001] This invention relates to the field of high-speed railway sand injection technology, specifically to a high-speed railway sand injection port structure. Background Technology

[0002] The sand spreading system spreads sand onto the rails during high-speed rail operation to increase wheel-rail adhesion in rainy or snowy weather, prevent slippage, and shorten braking distance. The sand injection port of the high-speed rail is part of the sand spreading system, and mainly replenishes the sand box in the sand spreading system through the sand injection port.

[0003] Currently, sand injection ports are usually located on the lower side of the carriage, and multiple sand-spreading systems are usually installed in the same train. Therefore, when adding sand and gravel to the same train, the process needs to be repeated multiple times. Secondly, the existing sand injection port channel is a circular structure, and the opening is sealed with a cap by mechanical locking. In use, the sand injection port is first manually unsealed, the sand injection pipe is moved and inserted into the sand injection port to inject sand, and after completion, the sand injection pipe is manually removed and the sand injection port is restored to its sealed state.

[0004] The following problems exist with the existing sand injection port and its usage process: 1. After the sand injection port is unsealed, it needs to be manually moved and the sand injection pipe inserted. The sand injection port remains open for a long time. 2. During sand injection, the gap between the sand injection port and the sand injection pipe is relatively large, which is equivalent to the sand injection port being open for the entire sand injection period. Therefore, in humid weather such as rain or snow, as the sand injection process progresses, the inside and outside of the sand box remain connected for a long time, which affects the dryness of the sand inside the sand box and thus affects the anti-slip effect after the sand is finally spread.

[0005] 2. The current sand injection operation requires manual unsealing of the sand injection port, followed by manual precise insertion of the pipe according to the position of the sand injection port, and finally manual removal of the sand injection pipe and restoration of the sand injection port to its sealed state after sand injection is completed. Furthermore, since multiple sand injection ports need to be injected in the same train, the above operation process needs to be repeated multiple times, making the overall operation cumbersome and inefficient. Summary of the Invention

[0006] Therefore, it is necessary to provide a high-speed railway sand injection port structure to solve the problems of the aforementioned existing technology.

[0007] This application provides a high-speed railway sand injection port structure, which is used in conjunction with a sand injection pipe and a sand box. It includes: a through pipe with its axis extending back and forth and communicating with its inner cavity is provided at the upper end of the sand box; a rectangular enclosure is fixedly provided on the front side of the sand box; an outer sealing unit is provided on the enclosure; an inner sealing unit is provided on the through pipe; and a matching component is provided on the sand injection pipe.

[0008] The outer enclosure unit includes a sealing plate 1. Two sealing plates 1 that slide up and down are provided at the front opening of the enclosure. The inner enclosure unit includes a sealing plate 2. Semi-circular sealing plates 2 are hinged on both the left and right sides of the pipe opening. When sand injection is not performed, the two sealing plates 2 close together to block the pipe opening.

[0009] The sand injection pipe is movably fitted with a sealing plate three for sealing the through pipe during the sand injection process. The sealing plate three and the front part of the sand injection pipe are jointly provided with a compression spring. The sand injection pipe and the through pipe are jointly provided with a locking component. After the sand injection pipe is inserted, the locking component locks the sand injection pipe by rotation.

[0010] According to an advantageous embodiment, the outer enclosure unit further includes a folding plate, and a folding plate is provided between the sealing plate and the enclosure. An installation block is fixedly provided on the rear side of the sealing plate, and electric sliders are slidably provided on both the upper and lower end faces inside the enclosure. The electric sliders are hinged to the adjacent installation blocks through connecting strips.

[0011] According to an advantageous embodiment, transmitters are fixedly mounted on the opposite surfaces of the two mounting blocks, and receivers are mounted on the upper and lower sides of the sand injection pipe, with the two receivers located on the front and rear sides of the sealing plate three.

[0012] According to an advantageous embodiment, semi-circular grooves are provided through the front and rear of the adjacent sides of the two sealing plates. When the sealing plates are closed, the two semi-circular grooves form a circular groove with the same diameter as the sand injection pipe.

[0013] The inner arc surface of the front semi-circular groove and the rear side of the sand injection pipe are both chamfered.

[0014] According to an advantageous embodiment, the fitting assembly includes a mounting bracket, on which the sand injection pipe is fitted with the mounting bracket. Two guide rods, symmetrically distributed and with their axes extending forward and backward, are slidably mounted on the mounting bracket. Guide blocks are fixedly mounted on both the left and right end faces inside the enclosure, and guide grooves are provided through the guide blocks from front to back.

[0015] According to an advantageous embodiment, the inner sealing unit further includes a movable block, on which a movable block corresponding to the second sealing plate is slidably disposed back and forth via an mounting rod. A return spring is provided between the movable block and the rear end of the mounting rod. The side of the movable block away from the pipe is hingedly connected to the corresponding second sealing plate. A limiting block corresponding to the movable block is fixedly disposed on the pipe.

[0016] According to an advantageous embodiment, the front end face of the movable block is provided with a docking groove for engaging with the guide rod, and a compression spring is provided between the mounting bracket and the front end of the guide rod, the elastic coefficient of the compression spring being greater than that of the return spring.

[0017] According to an advantageous embodiment, the locking component includes locking grooves, and the inner wall of the through pipe has a plurality of circumferentially distributed and L-shaped locking grooves, the front end opening of the longitudinal section of the locking groove is chamfered.

[0018] A mating block that mates with the locking groove is fixedly installed on the sand injection pipe. Rotating the sand injection pipe causes the mating block to enter the transverse section of the locking groove, thus completing the locking action of the sand injection pipe.

[0019] In summary, the present invention has the following beneficial effects: First, in the present invention, when sand is not injected, the sealing plate two forms an inner seal; when the sand injection pipe is inserted, the sand injection pipe and the sealing plate one together form an outer seal; when sand is injected, the sealing plate three blocks the through pipe to form an inner seal. Therefore, throughout the entire sand injection process and under the normal operation of the high-speed rail, the sand box is always isolated and sealed from the external space, ensuring that the dryness of the sand and gravel in the sand box meets the usage requirements.

[0020] Second, in the sand injection process of this invention, only manual insertion of the sand injection pipe is required, along with a small-amplitude rotation and locking. During the insertion process, the cooperating components guide the movement, making the operation simple and easy to operate, and improving the efficiency of repeated operations. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 A three-dimensional structural diagram of a high-speed railway sand injection port structure, a sand box, and a sand injection pipe, provided according to an embodiment of the present invention, is shown.

[0023] Figure 2 A partial cross-sectional perspective view of the three-dimensional structure between the enclosure, the sand injection pipe, and the through pipe provided according to an embodiment of the present invention is shown.

[0024] Figure 3 A partial sectional side view of the enclosure, sand injection pipe, and through pipe provided according to an embodiment of the present invention is shown.

[0025] Figure 4 A partial cross-sectional perspective view of the enclosure, sealing plate one, and sealing plate two provided according to an embodiment of the present invention is shown.

[0026] Figure 5 A partial cross-sectional perspective view of the passage pipe, locking groove, and locking block provided according to an embodiment of the present invention is shown.

[0027] Figure 6 A partial cross-sectional side view of the transmitter, receiver, and cover plate provided according to an embodiment of the present invention is shown.

[0028] Figure 7 A schematic diagram showing the state changes between the sand injection pipe, sealing plate one, sealing plate two, and sealing plate three provided according to an embodiment of the present invention is shown.

[0029] The above-mentioned attached drawings include the following reference numerals: 1. Sand box; 2. Through pipe; 3. Sand injection pipe; 4. Enclosure; 5. Outer enclosure unit; 50. Sealing plate one; 51. Folding plate; 52. Mounting block; 53. Electric slider; 54. Transmitter; 55. Receiver; 6. Inner enclosure unit; 60. Sealing plate two; 61. Moving block; 62. Return spring; 63. Limiting block; 64. Docking groove; 65. Compression spring; 7. Mating assembly; 70. Mounting bracket; 71. Guide rod; 72. Guide block; 8. Sealing plate three; 80. Rubber ring; 81. Compression spring; 9. Locking assembly; 90. Locking groove; 91. Docking block. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, a high-speed railway sand injection port structure is used in conjunction with a sand injection pipe 3 and a sand box 1. It includes: a through pipe 2 with its axis extending back and forth and communicating with its inner cavity is provided at the upper end of the sand box 1, and the sand injection pipe 3 is inserted into the through pipe 2 to perform sand injection operations.

[0032] A rectangular enclosure 4 is fixedly installed on the front side of the sand box 1. The through pipe 2 is located at the center of the enclosure 4. An outer sealing unit 5 is installed on the enclosure 4, and an inner sealing unit 6 is installed on the through pipe 2. A mating component 7 that cooperates with the outer sealing unit 5 and the inner sealing unit 6 is installed on the sand injection pipe 3.

[0033] The outer sealing unit 5 includes sealing plate 1 50. Two sealing plates 1 50 that slide up and down are provided at the front opening of the enclosure 4. When sand injection is not performed, the two sealing plates 1 50 close together to partially seal the area. The inner sealing unit 6 includes sealing plate 2 60. Semi-circular sealing plates 2 60 are hinged to both sides of the opening of the pipe 2. When sand injection is not performed, the two sealing plates 2 60 close together to block the opening of the pipe 2.

[0034] The sand injection pipe 3 is movably fitted with a sealing plate 3 8 for sealing the through pipe 2 during the sand injection process. A rubber ring 80 is fixedly installed on the front end face of the through pipe 2. The sealing plate 3 8 and the front part of the sand injection pipe 3 are jointly provided with a compression spring 81. A locking component 9 is jointly provided between the sand injection pipe 3 and the through pipe 2. After the sand injection pipe 3 is inserted, the locking component 9 locks the sand injection pipe 3 by rotation.

[0035] When sand injection is not performed, the sealing plate 260 forms a protective seal on the through pipe 2. When sand injection is performed, the sealing plate 50 and the inserted sand injection pipe 3 form an external protective seal on the enclosure 4, and the sealing plate 38 provides an internal protective seal on the opening of the through pipe 2. In summary, the through pipe 2 is sealed throughout the entire sand injection process.

[0036] Initially, no sand injection is performed. Both sealing plates 50 are closed, and both sealing plates 60 are closed, sealing the through pipe 2. This seals the sand box 1, preventing the quartz sand from remaining in a dry, sealed environment during normal high-speed rail use and ensuring its dryness is not affected by humidity. When the high-speed rail needs to replenish quartz sand after entering the station, the staff moves the sand injection pipe 3, gradually inserting it into the enclosure 4. The sealing plates 50 gradually open and adhere to the sand injection pipe 3, thus completely sealing the opening of the enclosure 4 through the sealing plates 50 and the sand injection pipe 3. During the movement, the insertion process of the sand injection pipe 3 is guided by the cooperating component 7. Then, as the sand injection pipe 3 is held... Continuing to move, the two sealing plates 60 are opened by the cooperating component 7. The sealing degree of sand box 1 is maintained by the cooperation between sealing plate 50 and sand injection pipe 3. Finally, sand injection pipe 3 is inserted into through pipe 2. The sand injection pipe 3 is manually rotated and locked by locking component 9. Then the sand injection operation begins. After the sand injection is completed, the sand injection pipe 3 is rotated in the opposite direction to release the locked state, and the sand injection pipe 3 is moved forward so that it gradually exits through pipe 2. Sealing plate 60 returns to the initial closed state of through pipe 2. Then the adhesion between sand injection pipe 3 and sealing plate 50 is released and it exits the enclosure 4. This completes the entire process of sand injection. For the state changes of sealing plate 1, sealing plate 2 and sealing plate 3, please refer to Figure 7 .

[0037] In summary, during the sand injection process, the sealing effect of the sealing plate 1 50 and the sand injection pipe 3 is replaced by the initial sealing plate 2 60 on the through pipe 2. Therefore, the sealing effect on the sand box 1 is maintained throughout the process. When the sand injection pipe 3 completes the sand injection and withdraws, the sealing plate 2 60 resets and replaces the sealing action of the sealing plate 1 50 and the sand injection pipe 3. Therefore, the sealing effect on the sand box 1 is maintained throughout the process. Thus, during the entire sand injection process, only manual movement of the inserted sand injection pipe 3 is required, and the sealing effect on the sand box 1 is maintained throughout the process. This avoids the problem of the dryness of the sand box 1 being affected by sand injection in a humid environment. Secondly, it also reduces the escape of dust during sand injection.

[0038] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the outer enclosure unit 5 also includes a folding plate 51. In order to maintain the sealing effect between the sealing plate 50 and the enclosure 4 after the sealing plate 50 moves, the sealing plate 50 and the enclosure 4 are jointly provided with a folding plate 51. An installation block 52 is fixedly provided on the rear side of the sealing plate 50. Electric sliders 53 are slidably provided on both the upper and lower end faces inside the enclosure 4. The electric sliders 53 are hinged to the adjacent installation blocks 52 through connecting strips.

[0039] like Figure 6 As shown, transmitters 54 are fixedly mounted on the opposite surfaces of the two mounting blocks 52, and receivers 55 are mounted on the upper and lower sides of the sand injection pipe 3, with the two receivers 55 located on the front and rear sides of the sealing plate 3 8. It should be noted that the spacing between adjacent receivers 55 was determined by those skilled in the art through actual simulation testing of the sand injection process before operation, and is a prior art feature. Furthermore, this spacing allows for precise closure of the sealing plate 1 50, which will not be elaborated upon further.

[0040] like Figure 4 As shown, semi-circular grooves are provided on the adjacent sides of the two sealing plates 50. After the sealing plates 50 are closed, the two semi-circular grooves form a circular groove with the same diameter as the sand injection pipe 3. In order to facilitate the insertion of the sand injection pipe 3 into the enclosure 4, the inner arc surface of the front semi-circular groove and the rear side of the sand injection pipe 3 are both chamfered.

[0041] like Figure 1 , Figure 2 and Figure 3 As shown, the component 7 includes a mounting bracket 70. The mounting bracket 70 is fitted onto the sand injection pipe 3. Two guide rods 71, which are symmetrically distributed and extend along the axis, are slidably mounted on the mounting bracket 70. Guide blocks 72 are fixedly mounted on both the left and right ends inside the enclosure 4. Guide grooves are provided through the guide blocks 72. In order to facilitate the insertion of the guide rods 71 ​​into the corresponding guide grooves, the front opening of the guide grooves is chamfered.

[0042] During operation, the sand injection pipe 3 is manually moved and enters the formed circular groove. The mounting frame 70 contacts the front end of the enclosure 4. At the same time, the guide rod 71 passes through the two sealing plates 50 and gradually engages with the corresponding guide groove. Through the cooperation between the two guide rods 71 ​​and the guide groove, the insertion process of the sand injection pipe 3 is guided. This facilitates the subsequent docking of the sand injection pipe 3 with the through pipe 2 and the locking of the sand injection pipe 3 by the locking component 9 for reference positioning. This avoids the problem of the sand injection pipe 3 moving out of position, affecting the work efficiency, and the sand injection pipe 3 failing to lock.

[0043] As the sand injection pipe 3 continues to move, it should be noted that both the transmitter 54 and the receiver 55 are part of a through-beam sensor system. The laser or infrared light emitted by the transmitter 54 is received by the receiver 55, generating an electronic signal that is transmitted to the control component of the through-beam sensor system. When the sand injection pipe 3 continues to move, causing the rear receiver 55 to face the corresponding transmitter 54, the laser or infrared light emitted by the upper transmitter 54 is received by the rear receiver 55 and converted into an electronic signal that is transmitted to the control component. The operation of the control component causes the electric slider 53 to work, and the two adjacent electric sliders 53 move away from each other, thus causing the two sealing plates 50 to move away from each other, facilitating the entry of the subsequent sealing plate 8 into the enclosure 4. When the subsequent front receiver 55 moves to face the corresponding transmitter 54, the lower transmitter 5... The emitted laser or infrared light source is received by the receiver 55 and converted into an electronic signal, which is then transmitted to the control component. The control component controls the electric slider 53 to reset, so the two sealing plates 50 reset and close together, fitting against the sand injection pipe 3. At this point, the front opening of the fence is completely closed, ensuring that the sand box 1 is completely sealed during the sand injection process when the sealing plate 60 is opened. When the sand injection action is completed, the sand injection pipe 3 moves forward and exits. The receiver 55 on the front side of the sand injection pipe 3 is again aligned with the corresponding transmitter 54. The two repeat the above cooperation process, causing the control component to control the electric slider 53 to work again, so that the two sealing plates 50 move away from each other, making it easier for the sealing plate 3 8 to exit. Subsequently, when the rear receiver 55 is aligned with the corresponding transmitter 54 again, the above process is repeated, the electric slider 53 works and resets again, and the two sealing plates 50 reset and close.

[0044] It should be further explained that, regarding the movement of the sealing plate 50 driven by the electric slider 53, in order to improve the waterproof performance of the internal components of the enclosure 4, a conventional mechanical method using a waterproof motor driven by a thread can be used to move the sealing plate 50. Alternatively, rubber baffles can be installed on the inner arc surfaces of the two semi-circular grooves to improve the waterproof effect on the inside of the enclosure 4 without affecting the insertion and connection of the sand injection pipe 3. The above descriptions all pertain to conventional mechanical components or mechanical implementation processes and are existing technologies or features, and will not be elaborated further.

[0045] like Figure 2 and Figure 4 As shown, the inner sealing unit 6 also includes a movable block 61. The movable block 61 corresponding to the second sealing plate 60 is slidably arranged on the through pipe 2 via the mounting rod. A return spring 62 is provided between the movable block 61 and the rear end of the mounting rod. The side of the movable block 61 away from the through pipe 2 is hinged to the corresponding second sealing plate 60. A limiting block 63 corresponding to the movable block 61 is fixedly arranged on the through pipe 2.

[0046] The front end face of the movable block 61 is provided with a docking groove 64 that mates with the guide rod 71. A pressure spring 65 is provided between the mounting bracket 70 and the front end of the guide rod 71. The elastic coefficient of the pressure spring 65 is greater than that of the return spring 62.

[0047] like Figure 5 As shown, the locking component 9 includes a locking groove 90. The inner wall of the through pipe 2 has multiple circumferentially distributed and L-shaped locking grooves 90. The front end opening of the longitudinal section of the locking groove 90 is chamfered.

[0048] A mating block 91 that mates with the locking groove 90 is fixedly installed on the sand injection pipe 3. Rotating the sand injection pipe 3 causes the mating block 91 to enter the transverse section of the locking groove 90, thus completing the locking action of the sand injection pipe 3. The junction of the longitudinal and transverse sections of the locking groove 90 is chamfered.

[0049] After the sealing plate 50 is reset, as the guide rod 71 continues to move, the guide plate is guided by the guide groove and docks with the docking groove 64. The sand injection pipe 3 continues to move, causing the reset spring 62 to deform and the moving block 61 to move backward. As a result, the two sealing plates 60 gradually open. As the sand injection pipe 3 continues to move, the sealing plates 60 open to face forward. The moving block 61 moves until it is in contact with the limiting block 63 and the moving block 61 can hardly move further. The subsequent sand injection pipe 3 continues to move and enters the through pipe 2. Through the cooperation between the guide rod 71 and the guide groove, the docking block... 91 enters the longitudinal section of the locking groove 90. At the same time, the sealing plate 3 8 and the front end of the through pipe 2 are in close contact. As the sand injection pipe 3 continues to move, the compression spring 81 deforms and generates elastic force on the sealing plate 3 8. Therefore, during the sand injection process, the sand box 1 is kept in a closed state by the sealing plate 3 8 and the through pipe 2 being in close contact. When the docking block 91 moves to the junction of the transverse and longitudinal sections of the locking groove 90, the sand injection pipe 3 is manually rotated so that the docking block 91 enters the transverse section of the locking groove 90, thus locking the sand injection pipe 3, and the subsequent sand injection steps are carried out.

[0050] After sand injection is completed, the sand injection pipe 3 is manually rotated in the reverse direction to release its locked state and move forward. The compression spring 81 returns to its original deformation, and the pressure spring 65 returns to its original deformation first. At this time, the moving block 61 is still in contact with the limit block 63. When the pressure spring 65 returns to its original state, the sand injection pipe 3 exits the through pipe 2 and continues to move forward. The reset spring 62 returns to its original state. The elastic force generated by the deformation of the reset spring 62 causes the moving block 61 to move forward, thus causing the two sealing plates 60 to return to their initial closed state. Finally, the sand injection pipe 3 completely exits the through pipe 2 and the enclosure 4, completing the entire operation of a single sand injection.

[0051] It should be further explained that the rotation angle of the sand injection pipe 3 is the same as the angle of the area where the docking block 91 moves in the transverse section of the locking groove 90. Therefore, in the initial state, through the cooperation between the guide rod 71 and the guide groove, the docking block 91 and the longitudinal section of the locking groove 90 are aligned front and back. In this state, the transmitter 54 and the receiver 55 are in the same vertical plane, ensuring the precise operation of the outer sealing unit 5. When the sand injection pipe 3 is rotated laterally, the docking block 91 can be completely rotated into the transverse section of the locking groove 90, ensuring the precise implementation of the locking action of the sand injection pipe 3. At the same time, it avoids the problem that the sand injection pipe 3 enters the through pipe 2 due to the unclear initial angle of the sand injection pipe 3, which would affect the overall operation efficiency and operation accuracy.

[0052] Additional explanation is needed regarding the overall technical solution. Compared to existing operations where the sand injection port is manually opened and mechanically sealed, followed by manual insertion of the sand injection pipe 3 for sand injection, this solution adds a barrier 4, an outer sealing unit 5, an inner sealing unit 6, a cooperating component 7, a sealing plate 3 8, and a locking component 9. When the sand injection pipe 3 is not inserted into the barrier 4 (in an un-inserted state), the outer sealing unit 5 is initially in a semi-closed state, while the sealing plate 2 60 in the inner sealing unit 6 blocks the through pipe 2, keeping the sand box 1 dry. When the sand injection pipe 3 enters the barrier 4 but not yet into the through pipe 2, the outer sealing unit 5 and the sand injection pipe 3 work together to form a completely closed exterior. At this time, the inner sealing unit 6 remains closed. As the sand injection pipe 3 gradually enters the through pipe 2, the outer sealing unit 5 remains closed. The sand box 1 is in a completely sealed state, while the inner seal is in an open state. At this time, the sand box 1 is still in a sealed and dry state. In summary, during the entire sand injection process of the sand injection pipe 3, the sand box 1 is in a completely sealed state, ensuring that the dryness of the internal quartz sand meets the usage requirements. Compared with the sand injection action in the prior art, the sealing and dryness during the sand injection process is greatly improved. Secondly, during the operation, only the back-and-forth movement of the sand injection pipe 3 and the rotation within a set angle are required. Compared with the operation steps in the prior art, it is simple and efficient. In addition, the added parts are all existing conventional mechanical parts, which can be used for a long time after a single installation. Therefore, compared with improving the convenience of the sand injection process and the sealing protection of the sand box 1, the cost of the added parts is negligible. In summary, this technical solution is a specific improvement made entirely based on the defects of the prior art and to solve the defects of the prior art.

[0053] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0054] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high-speed railway sand injection port structure, used in conjunction with a sand injection pipe and a sand box, characterized in that, include: The upper end of the sand box is provided with a through pipe that extends back and forth along its axis and communicates with its inner cavity. A rectangular enclosure is fixedly provided on the front side of the sand box. An outer sealing unit is provided on the enclosure, an inner sealing unit is provided on the through pipe, and a mating component is provided on the sand injection pipe. The outer sealing unit includes sealing plate one, and two sealing plates one that slide up and down are provided at the front opening of the enclosure. The inner sealing unit includes sealing plate two, and semi-circular sealing plates two are hinged on both the left and right sides of the pipe opening. When sand injection is not performed, the two sealing plates two close together to block the pipe opening. The sand injection pipe is movably fitted with a sealing plate three for sealing the through pipe during the sand injection process. The sealing plate three and the front part of the sand injection pipe are jointly provided with a compression spring. The sand injection pipe and the through pipe are jointly provided with a locking component. After the sand injection pipe is inserted, the locking component locks the sand injection pipe by rotation. When sand injection is not performed, the sealing plate 2 forms a protective seal on the through pipe; when sand injection is performed, the sealing plate 1 and the inserted sand injection pipe form an external protective seal on the enclosure, and the sealing plate 3 provides internal protection for the opening of the through pipe. The through pipe is sealed throughout the entire sand injection process. The fitting components include a mounting frame, a mounting frame is fitted on the sand injection pipe, and two guide rods that are symmetrically distributed and extend along the axis are slidably arranged on the mounting frame. Guide blocks are fixedly installed on both the left and right ends inside the enclosure, and guide grooves are provided through the guide blocks. The inner sealing unit also includes a movable block. A movable block corresponding to the second sealing plate is slidably arranged on the through pipe via an installation rod. A return spring is provided between the movable block and the rear end of the installation rod. The side of the movable block away from the through pipe is hinged to the corresponding second sealing plate. A limiting block corresponding to the movable block is fixedly arranged on the through pipe. The front end face of the movable block is provided with a docking groove for connecting with the guide rod. A pressure spring is provided between the front end of the mounting bracket and the guide rod. The elastic coefficient of the pressure spring is greater than that of the return spring.

2. The high-speed railway sand injection port structure according to claim 1, characterized in that: The outer enclosure unit also includes a folding plate. A folding plate is provided between the sealing plate and the enclosure. An installation block is fixedly provided on the rear side of the sealing plate. Electric sliders are slidably provided on both the upper and lower end faces inside the enclosure. The electric sliders are hinged to the adjacent installation blocks through connecting strips.

3. The high-speed railway sand injection port structure according to claim 2, characterized in that: A transmitter is fixedly installed on the opposite side of each of the two mounting blocks, and a receiver is installed on the upper and lower sides of the sand injection pipe, with the two receivers located on the front and rear sides of the sealing plate three.

4. The high-speed railway sand injection port structure according to claim 1, characterized in that: Both of the two sealing plates have semi-circular grooves extending through them from front to back. When the sealing plates are closed, the two semi-circular grooves form a circular groove with the same diameter as the sand injection pipe. The inner arc surface of the semi-circular groove on the front side and the rear side of the sand injection pipe are both chamfered.

5. The high-speed railway sand injection port structure according to claim 1, characterized in that: The locking component includes locking grooves. Multiple circumferentially distributed, L-shaped locking grooves are provided on the inner wall of the through pipe. The front end opening of the longitudinal section of the locking groove is chamfered. The sand injection pipe is fixedly equipped with a docking block that mates with the locking groove. Rotating the sand injection pipe causes the docking block to enter the transverse section of the locking groove, thereby completing the locking action of the sand injection pipe.

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