A railway turnout external locking device

Abstract

The present invention belongs to the field of railway transportation technology, and discloses an external locking device for railway turnout, comprising a locking cylinder, a locking sleeve, a first locking block, a second locking block and a locking rod, wherein the locking cylinder is connected to the base rail, the locking sleeve is connected to the point rail, the locking sleeve is movably installed in the locking cylinder, the locking rod is installed in the locking sleeve, and the locking sleeve drives the point rail to move to have a first extreme position and a second extreme position, that is, a close position and a repelling position corresponding to the point rail. The locking rod can drive the locking sleeve to move between the two extreme positions through the first locking block or the second locking block, when the locking sleeve moves to the first extreme position, the first locking block can be clamped in the first limiting groove, when the locking sleeve moves to the second extreme position, the first locking block can be clamped in the second limiting groove, the locking sleeve can be locked and fixed at both extreme positions, that is, the point rail connected thereto can be locked and fixed at both the close position and the repelling position, so as to ensure the stability of the turnout when passing a vehicle and reduce safety hazards.

Description

Technical Field

[0001] The invention relates to the technical field of railway transportation, and in particular to an external locking device for a railway turnout. Background Art

[0002] A turnout is a line connection device that allows trains to switch from one track to another. It is also one of the weak links of the track. It is usually laid in large quantities at stations and marshalling yards. By setting up turnouts, the line's capacity for passing trains can be fully utilized. Even for single-track railways, by laying turnouts and building a fork line that is longer than the length of the train, trains can be driven in opposite directions.

[0003] A common single-opening turnout includes two basic rails and two point rails at intervals. The two point rails are located between the two basic rails. When switching tracks, one of the point rails is closely attached to the basic rail next to it, and the other point rail is separated from the basic rail next to it. After the track is switched, the basic rails and the point rails need to be locked to prevent movement.

[0004] The external locking device of the turnout is a device that can lock and fix the stock rail and the point rail. The external locking device of the turnout in the prior art usually includes a locking rod and a locking hook, which locks the point rail and the stock rail through the action of the locking rod and the locking hook to avoid a large displacement of the point rail relative to the stock rail after switching tracks.

[0005] However, the existing external locking device of the turnout can only lock the close contact position of the point rail, but cannot lock the repelled position of the point rail, resulting in poor stability of the point rail repelled from the base rail. When the train passes, the point rail repelled from the base rail is easily vibrated by the impact load, which causes serious deformation over time and shortens the service life of the turnout.

[0006] In addition, with the continuous development of my country's railways, the environment where the external locking device of the turnout is located is becoming increasingly harsh. In actual applications, the external locking device will wear or rust due to factors such as sand, ice and snow, which will lead to the jamming of the turnout. The existing external locking device of the turnout does not have good sealing performance, resulting in low reliability and increasing subsequent maintenance workload and repair costs. Summary of the invention

[0007] The purpose of the present invention is to provide an external locking device for railway turnouts, which can be firmly locked when the point rail is in close contact with the base rail and when the point rail is separated from the base rail, thereby ensuring the stability of the turnout when passing a vehicle and reducing shaking and deformation.

[0008] To achieve this object, the present invention adopts the following technical solutions:

[0009] A railway turnout external locking device, comprising:

[0010] A locking cylinder is connected to the base rail, and the inner wall of the locking cylinder is provided with a first limiting groove and a second limiting groove at intervals along the axial direction;

[0011] A locking sleeve connected to the point rail and movably inserted into the locking cylinder, wherein a first through hole and a second through hole are arranged in the axial direction at intervals, wherein the first through hole and the second through hole are both communicated with the inner cavity of the locking sleeve, and the locking sleeve has a first extreme position and a second extreme position;

[0012] A first locking block and a second locking block, wherein the first locking block is movably disposed in the first through hole along the radial direction of the locking sleeve, and the second locking block is movably disposed in the second through hole along the radial direction of the locking sleeve;

[0013] A locking rod, inserted into the locking sleeve;

[0014] The locking rod can drive the locking sleeve to move along the first direction through the first locking block. When the locking sleeve moves to the first limit position, the first locking block extends out of the first through hole and is clamped in the first limiting groove.

[0015] The locking rod can drive the locking sleeve to move along the second direction through the second locking block. When the locking sleeve moves to the second extreme position, the second locking block extends out of the second through hole and is clamped in the second limiting groove. The first direction is opposite to the second direction.

[0016] As a preferred solution of the external locking device of the railway turnout provided by the present invention, a first slide groove and a second slide groove are arranged on the locking rod at intervals along the axial direction, the first locking block can slide in the first slide groove, the second locking block can slide in the second slide groove, and the locking rod further includes a limiting contact surface, and the limiting contact surface is located between the first slide groove and the second slide groove;

[0017] When the locking sleeve is located at the first extreme position, one side of the first locking block abuts against the bottom of the first limiting groove, and the other side abuts against the limiting contact surface; one side of the second locking block abuts against the inner wall of the locking cylinder, and the other side abuts against the bottom of the second sliding groove;

[0018] When the locking sleeve is located at the second extreme position, one side of the second locking block abuts against the bottom of the second limiting groove, and the other side abuts against the limiting contact surface; one side of the first locking block abuts against the inner wall of the locking cylinder, and the other side abuts against the bottom of the first sliding groove.

[0019] As a preferred solution of the railway turnout external locking device provided by the present invention, the groove walls of the first slide groove and the second slide groove close to each other are inclined relative to the axis of the locking rod to form a push inclined surface, and the first locking block and the second locking block are provided with a guiding inclined surface on one side close to each other;

[0020] The pushing inclined surface in the first sliding groove and the guiding inclined surface of the first locking block can be slidably matched to lift the first locking block and push it into the first limiting groove;

[0021] The pushing inclined surface in the second sliding groove and the guiding inclined surface of the second locking block can be slidably matched to lift the second locking block and push it into the second limiting groove.

[0022] As a preferred solution of the external locking device of the railway turnout provided by the present invention, the first locking block and the second locking block both include a first arc surface and a second arc surface, the first arc surface can cooperate with the inner wall of the locking cylinder, and the second arc surface can cooperate with the limiting contact surface.

[0023] As a preferred embodiment of the external locking device of the railway turnout provided by the present invention, a plurality of the first locking blocks and the second locking blocks are arranged at intervals along the circumference of the locking rod, a plurality of the first through holes and the second through holes are arranged at intervals along the circumference of the locking sleeve, a plurality of the first locking blocks are arranged in a one-to-one correspondence with a plurality of the first through holes, a plurality of the second locking blocks are arranged in a one-to-one correspondence with a plurality of the second through holes, the first limiting groove and the second limiting groove are both arranged along the circumference of the locking cylinder, and the first sliding groove and the second sliding groove are both arranged along the circumference of the locking rod.

[0024] As a preferred solution of the railway turnout external locking device provided by the present invention,

[0025] Two first sealing components are sandwiched between the inner wall of the locking sleeve and the outer wall of the locking rod, and the first sliding groove and the second sliding groove are located between the two first sealing components;

[0026] Two second sealing components are sandwiched between the inner wall of the locking cylinder and the outer wall of the locking sleeve, and the first limiting groove and the second limiting groove are located between the two second sealing components.

[0027] As a preferred solution of the railway turnout external locking device provided by the present invention,

[0028] The two first sealing assemblies each include a first dustproof ring and a first waterproof ring, wherein the first dustproof ring is arranged on a side of the first waterproof ring facing away from the first slide groove and the second slide groove;

[0029] The two second sealing components each include a second dustproof ring and a second waterproof ring, and the second dustproof ring is arranged on a side of the second waterproof ring facing away from the first limiting groove and the second limiting groove.

[0030] As a preferred solution of the railway turnout external locking device provided by the present invention, two oil injection channels are provided on the locking cylinder, one of the oil injection channels is connected to the first limiting groove, and the other oil injection channel is connected to the second limiting groove.

[0031] As a preferred embodiment of the external locking device of the railway turnout provided by the present invention, it also includes an oiling nozzle, which includes an oiling nozzle body and a stop ring protruding from the outer wall of the oiling nozzle body, the oiling nozzle body is inserted and connected in the oiling channel, and the stop ring abuts against the outer wall of the locking cylinder.

[0032] As a preferred solution of the railway turnout external locking device provided by the present invention, a lifting ring is provided on the locking cylinder, and the lifting ring is configured to be connected to the stock rail through a fixing tool.

[0033] Beneficial effects of the present invention:

[0034] In the external locking device of the railway turnout provided by the present invention, the locking sleeve is installed in the locking cylinder and can slide in the locking cylinder, the locking rod is installed in the locking sleeve, the locking cylinder is connected to the base rail, the locking sleeve is connected to the point rail (movable), when the track is switched, the point rail is closely attached to or repelled from the base rail outside it, and the locking sleeve has a first extreme position and a second extreme position when driving the point rail to move, and the first extreme position and the second extreme position correspond to the close-attachment position and the repelling position of the point rail. When the point rail switches between the close-attachment position and the repelling position, the locking sleeve needs to move between the first extreme position and the second extreme position accordingly to drive the point rail. Specifically, when the locking sleeve needs to be moved to the first limit position, the locking rod is driven to move along the first direction (the axial direction of the locking rod), and the locking rod can drive the locking sleeve to move along the first direction through the first locking block until the locking sleeve reaches the first limit position. At this time, the first locking block can extend out of the first through hole on the locking sleeve and be clamped in the first limiting groove. The groove wall of the first limiting groove can prevent the first locking block and the locking sleeve from continuing to move, thereby realizing the locking of the locking sleeve at the first limit position. When the locking sleeve needs to be moved to the second limit position, the locking rod is driven in the reverse direction to move along the second direction (the axial direction of the locking rod and opposite to the first direction), and the locking rod can drive the locking sleeve to move synchronously along the second direction through the second locking block until the locking sleeve reaches the second limit position. At this time, the second locking block can extend out of the second through hole on the locking sleeve and be clamped in the second limiting groove. The groove wall of the second limiting groove can prevent the second locking block and the locking sleeve from continuing to move, thereby realizing the locking of the locking sleeve at the second limit position. The locking sleeve can be locked and fixed in both the first extreme position and the second extreme position, that is, the point rail connected thereto can be locked and fixed in both the close position and the repelling position, preventing the point rail from moving, ensuring the stability of the turnout when passing vehicles, and reducing safety hazards.

[0035] In addition, the external locking device of the railway turnout is a sealed type, and its interior is coated with grease or lubricating oil. Compared with the traditional hook-type external locking device which is completely exposed to the outside, sand and soil can easily cause the hook to get stuck and fail to unlock or lock, and rain, ice and snow can easily cause the device to rust, resulting in the unlocking or locking process not being smooth. It has waterproof and dustproof functions, reduces a lot of on-site maintenance and inspection work, effectively prevents the occurrence of locking device jamming, and makes the sealed locking device more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is an axonometric diagram of a railway turnout external locking device provided in a specific embodiment of the present invention;

[0037] Figure 2 It is a first cross-sectional view of the external locking device of a railway turnout provided by a specific embodiment of the present invention (the locking sleeve is in the first extreme position);

[0038] Figure 3 It is a second cross-sectional view of the railway turnout external locking device provided by a specific embodiment of the present invention (the locking sleeve is in the middle switching position);

[0039] Figure 4 is a third cross-sectional view of the railway turnout external locking device provided in a specific embodiment of the present invention (the locking sleeve is in the second extreme position);

[0040] Figure 5 yes Figure 2 A partial enlarged view of the middle A;

[0041] Figure 6 is a cross-sectional view of a locking cylinder provided in a specific embodiment of the present invention;

[0042] Figure 7 is a schematic structural diagram of a locking sleeve provided in a specific embodiment of the present invention;

[0043] Figure 8 is a schematic structural diagram of a locking rod provided in a specific embodiment of the present invention;

[0044] Fig. 9 is a cross-sectional view of a first locking block provided in a specific embodiment of the present invention;

[0045] Fig.10 is a side view of a first locking block provided in a specific embodiment of the present invention;

[0046] Fig.11 yes Figure 2 A partial enlarged view of point B in the middle.

[0047] In the figure:

[0048] 1-locking cylinder; 2-locking sleeve; 3-first locking block; 4-second locking block; 5-locking rod; 6-first sealing assembly; 7-second sealing assembly; 8-oiling nozzle;

[0049] 11-first limiting groove; 12-second limiting groove; 13-oil injection channel; 14-lifting ring;

[0050] 21-first through hole; 22-second through hole; 23-screwing portion;

[0051] 31- guiding inclined surface; 32- first arc surface; 33- second arc surface;

[0052] 51-first slide groove; 52-second slide groove; 53-limiting contact surface; 54-pushing inclined surface; 55-mechanical interface;

[0053] 61-first dustproof ring; 62-first waterproof ring;

[0054] 71- second dustproof ring; 72- second waterproof ring;

[0055] 81 - Grease nozzle body; 82 - Stop ring. DETAILED DESCRIPTION

[0056] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0057] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0059] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0060] like Figure 1 to Figure 2 As shown, this embodiment provides a railway turnout external locking device, which can automatically lock the point rail and the base rail after the turnout switches tracks, that is, fix the position of the point rail relative to the base rail to prevent movement. The railway turnout external locking device includes a locking cylinder 1, a locking sleeve 2, a first locking block 3, a second locking block 4 and a locking rod 5.

[0061] See also Figure 1 and Figure 2 The locking sleeve 2 is inserted into the locking cylinder 1 and can slide in the locking cylinder 1. The locking rod 5 is inserted into the locking sleeve 2. The locking cylinder 1 is connected to the base rail and is fixed, and the locking sleeve 2 is connected to the point rail and can drive the point rail to move so that the point rail moves between the close position and the repelling position. The locking rod 5 is connected to the switch machine, and the switch machine is used to drive the locking rod 5 to move, so that the locking rod 5 drives the locking sleeve 2 and the point rail connected to the locking sleeve 2 to move.

[0062] In this embodiment, the main structure of the locking device is sleeve-shaped or rod-shaped. Compared with the locking device in the form of a lock hook in the prior art, the structure is simpler. Since there are no irregular parts, it is easier to manufacture and process. It also effectively reduces the volume of the locking device, saves space, and is more convenient to install, disassemble and transport.

[0063] See also Figure 3 and Figure 6 The inner wall of the locking cylinder 1 is provided with a first limiting groove 11 and a second limiting groove 12, and the first limiting groove 11 and the second limiting groove 12 are arranged at intervals along the axial direction of the locking cylinder 1. Figure 7 The side wall of the locking sleeve 2 is provided with a first through hole 21 and a second through hole 22, which are arranged at intervals along the axial direction of the locking sleeve 2 and are both connected to the inner cavity of the locking sleeve 2. The first locking block 3 is movably arranged in the first through hole 21 along the radial direction of the locking sleeve 2, and the second locking block 4 is movably arranged in the second through hole 22 along the radial direction of the locking sleeve 2, that is, the top ends of the first locking block 3 and the second locking block 4 can both extend outward from the locking sleeve 2 to protrude from the outer wall of the locking sleeve 2, and the bottom ends of the first locking block 3 and the second locking block 4 can both move toward the inner cavity of the locking sleeve 2 and protrude from the inner wall of the locking sleeve 2.

[0064] When switching tracks, the point rail is in close contact with or repelled from the base rail outside it, and the locking sleeve 2 has a first limit position and a second limit position when driving the point rail to move, and the first limit position and the second limit position correspond to the close contact position and the repelling position of the point rail. When the point rail switches between the close contact position and the repelling position, the locking sleeve 2 needs to move between the first limit position and the second limit position accordingly to drive the point rail.

[0065] Specifically, when the locking sleeve 2 needs to move to the first limit position, the locking rod 5 is driven to move along the first direction (the axial direction of the locking rod 5), and the locking rod 5 can drive the locking sleeve 2 to move along the first direction through the first locking block 3 until the locking sleeve 2 reaches the first limit position. At this time, the first locking block 3 can extend out of the first through hole 21 on the locking sleeve 2 and be clamped in the first limiting groove 11. The groove wall of the first limiting groove 11 can prevent the first locking block 3 and the locking sleeve 2 from continuing to move, thereby realizing the locking of the locking sleeve 2 at the first limit position.

[0066] When the locking sleeve 2 needs to move to the second extreme position, the locking rod 5 is driven in the reverse direction to move it in the second direction (the axial direction of the locking rod 5 and opposite to the first direction). The locking rod 5 can drive the locking sleeve 2 to move synchronously in the second direction through the second locking block 4 until the locking sleeve 2 reaches the second extreme position. At this time, the second locking block 4 can extend out of the second through hole 22 on the locking sleeve 2 and be clamped in the second limiting groove 12. The groove wall of the second limiting groove 12 can prevent the second locking block 4 and the locking sleeve 2 from continuing to move, thereby realizing the locking of the locking sleeve 2 at the second extreme position.

[0067] In this embodiment, the locking sleeve 2 can be locked and fixed in both the first extreme position and the second extreme position, that is, the point rail connected thereto can be locked and fixed in both the close position and the repelling position, preventing the point rail from moving, ensuring the stability of the turnout when passing vehicles, and reducing safety hazards.

[0068] Reference Figures 2 to 4 For the convenience of description, the rightward direction is defined as the first direction mentioned above, and the leftward direction is defined as the second direction mentioned above.

[0069] See also Figure 2 and Figure 8 Optionally, the locking rod 5 is provided with a first slide groove 51 and a second slide groove 52, which are arranged at intervals along the axial direction of the locking rod 5. The first locking block 3 can slide in the first slide groove 51, and the second locking block 4 can slide in the second slide groove 52. The annular surface between the first slide groove 51 and the second slide groove 52 on the locking rod 5 is a limiting contact surface 53 of the locking rod 5, which can contact the first locking block 3 and the second locking block 4 to limit the first locking block 3 and the second locking block 4.

[0070] Specifically, see Figure 2, which is a schematic diagram of the locking sleeve 2 being located at the first extreme position. The switch machine that drives the locking rod 5 to move left and right stops running, and the locking rod 5 no longer moves. At this time, one side of the first locking block 3 is in contact with the bottom of the first limiting groove 11, and the other side is in contact with the limiting contact surface 53. At the same time, one side of the second locking block 4 is in contact with the inner wall of the locking cylinder 1, and the other side is in contact with the bottom of the second chute 52. The second locking block 4 is located in the middle section of the second chute 52, and it does not contact the side wall of the second chute 52. Since a part of the first locking block 3 is inserted into the first limiting groove 11, and the other part is located in the first through hole 21 on the locking sleeve 2, and is in contact with the limiting contact surface 53 of the locking rod 5, the locking sleeve 2 cannot move left and right under the joint action of the groove wall of the first limiting groove 11 and the limiting contact surface 53. When the point rail is subjected to impact load or vibration, the load and vibration can be transmitted to the locking sleeve 2, and the presence of the first locking block 3 can limit the relative movement of the locking sleeve 2 due to the load or vibration. Therefore, the point rail can be firmly and reliably locked in the first extreme position.

[0071] It can be understood that after the locking sleeve 2 stops at the first limit position, the point rail can be firmly locked with the base rail outside the point rail. At this time, the point rail may be closely attached to the base rail or may be separated from the base rail.

[0072] See also Figure 4 , which is a schematic diagram when the locking sleeve 2 is located at the second extreme position. Similarly, the switch machine no longer drives the locking rod 5 to move. At this time, one side of the second locking block 4 is in contact with the bottom of the second limiting groove 12, and the other side is in contact with the limiting contact surface 53. At the same time, one side of the first locking block 3 is in contact with the inner wall of the locking cylinder 1, and the other side is in contact with the bottom of the first sliding groove 51. The first locking block 3 is located in the middle section of the first sliding groove 51, and it does not contact the groove side wall of the first sliding groove 51. Since a part of the second locking block 4 is inserted into the second limiting groove 12, and the other part is located in the second through hole 22 on the locking sleeve 2, and is in contact with the limiting contact surface 53 of the locking rod 5, therefore, under the joint action of the groove wall of the second limiting groove 12 and the limiting contact surface 53, the locking sleeve 2 cannot move left and right, so as to realize the locking of the point rail with the base rail at this position.

[0073] If the locking sleeve 2 is in the first extreme position, the point rail is in close contact with the outer basic rail (i.e., the point rail is in the close contact position), then the point rail is repelled from the outer basic rail when the locking sleeve 2 moves to the second extreme position (i.e., the point rail is in the repelling position). Conversely, if the point rail is in the repelling position when the locking sleeve 2 is in the first extreme position, then the point rail is in the close contact position when the locking sleeve 2 moves to the second extreme position. Whether the point rail is in the close contact position or the repelling position, the locking device can lock it.

[0074] Alternatively, see Figure 2 and Figure 5The groove walls of the first slide groove 51 and the second slide groove 52 close to each other are inclined relative to the axis of the locking rod 5 to form a push-up slope 54. The push-up slope 54 is set at an obtuse angle to the bottom walls of the first slide groove 51 and the second slide groove 52. Figure 5 and Fig. 9 The first locking block 3 and the second locking block 4 are both provided with a guide slope 31 on one side close to each other. The push slope 54 in the first slide groove 51 has the same inclination direction as the guide slope 31 of the first locking block 3, and the two can slide together. The push slope 54 in the second slide groove 52 has the same inclination direction as the guide slope 31 of the second locking block 4, and the two can slide together. Figure 3 , which is a schematic diagram showing the locking sleeve 2 moving from the first extreme position to the second extreme position, and the second locking block 4 is in Figure 3 , the push slope 54 in the second limiting groove 12 on the locking rod 5 abuts against the guide slope 31 of the second locking block 4, so that the locking sleeve 2 is pushed to the left by the second locking block 4. When the second locking block 4 is pushed to the position of the second limiting groove 12, since the inner wall of the locking cylinder 1 is no longer blocking, the guide slope 31 of the second locking block 4 slides relative to the push slope 54 in the second slide groove 52, and the second locking block 4 moves toward the bottom of the second limiting groove 12. When one side of the second locking block 4 contacts the bottom wall in the second limiting groove 12, the other side of the second locking block 4 just slides onto the limiting contact surface 53, that is, Figure 4 Status shown.

[0075] Similarly, when the locking sleeve 2 moves from the second extreme position to the first extreme position, the pushing inclined surface 54 in the first sliding groove 51 can slidably cooperate with the guiding inclined surface 31 of the first locking block 3, so that the locking rod 5 can lift the first locking block 3 and push it into the first limiting groove 11.

[0076] See also Figure 4 In this embodiment, the two opposite side walls of the first chute 51 and the two opposite side walls of the second chute 52 are slopes, and the slopes are set at an obtuse angle with the bottom walls of the first chute 51 and the second chute 52. The slopes close to each other on the first chute 51 and the second chute 52 are the above-mentioned push slopes 54. The first chute 51 and the second chute 52 have the same shape and size, and their two slopes are symmetrical relative to the center of the groove. This structure is simple to manufacture and convenient to process. When the two chute are processed by lathe, there is no need to consider the setting position of the slope. It is only necessary to process the side walls of the two chute into slopes, which simplifies the process.

[0077] See also Fig. 9, which shows a cross-sectional view of the first locking block 3 (along the axial direction of the locking rod 5). In this embodiment, the first locking block 3 and the second locking block 4 have the same structure and size. Here, the first locking block 3 is taken as an example for description. The cross-section of the first locking block 3 is an octagon, and the octagon is a centrally symmetrical figure. Fig. 9 In the state shown, the plane where the hypotenuse at the lower left corner of the first locking block 3 is located is the guiding inclined surface 31 of the first locking block 3. The first locking block 3 of this shape is simple to process and easy to manufacture.

[0078] Further, see Fig. 9 and Fig.10 The first locking block 3 and the second locking block 4 both include a first arc surface 32 and a second arc surface 33. The first arc surface 32 can match with the inner wall of the locking cylinder 1, and the second arc surface 33 can match with the limiting contact surface 53. That is, the first locking block 3 and the second locking block 4 are both arc-shaped to match the inner wall of the locking cylinder 1 and the outer wall of the locking rod 5.

[0079] See also Figures 2 to 4 The two opposite groove side walls of the first limiting groove 11 and the two opposite groove side walls of the second limiting groove 12 on the locking cylinder 1 are both slopes, and the slopes are arranged at an obtuse angle with the bottom walls of the first limiting groove 11 and the second limiting groove 12. The two slopes of the first limiting groove 11 and the second limiting groove 12 are symmetrically distributed relative to the groove center. The shape of the first limiting groove 11 can be adaptively matched with the side where the first locking block 3 is inserted, and the second limiting groove 12 can be adaptively matched with the side where the second locking block 4 is inserted.

[0080] See also Figure 8 , four first locking blocks 3 and four second locking blocks 4 are arranged at intervals along the circumference of the locking rod 5. Figure 7 , four first through holes 21 and four second through holes 22 are arranged at intervals along the circumference of the locking sleeve 2. Four first locking blocks 3 are arranged one-to-one with the four first through holes 21, and one first locking block 3 is arranged in each first through hole 21. Four second locking blocks 4 are arranged one-to-one with the four second through holes 22, and one second locking block 4 is arranged in each second through hole 22. In this embodiment, see Figure 6 The first limiting groove 11 and the second limiting groove 12 are both arranged along the circumference of the locking cylinder 1, see Figure 8 The first slide groove 51 and the second slide groove 52 are both arranged along the circumference of the locking rod 5, that is, the first limiting groove 11, the second limiting groove 12, the first slide groove 51 and the second slide groove 52 are all annular grooves to accommodate the plurality of first locking blocks 3 and the plurality of second locking blocks 4 distributed in a circumference. Furthermore, the locking sleeve 2 can rotate relative to the locking cylinder 1 to adapt to the creeping of the point rail.

[0081] See also Figure 2 and Fig.11 Two first sealing components 6 are sandwiched between the inner wall of the locking sleeve 2 and the outer wall of the locking rod 5. Specifically, grooves are provided at both ends of the inner wall of the locking sleeve 2 for mounting the first sealing components 6. When the locking rod 5 slides relative to the locking sleeve 2, the first sliding groove 51 and the second sliding groove 52 of the locking rod 5 are always located between the two first sealing components 6, so as to prevent the first sliding groove 51 and the second sliding groove 52 from extending out of the locking sleeve 2 and losing the sealing function.

[0082] See also Figure 2 and Figure 5 Two second sealing components 7 are sandwiched between the inner wall of the locking cylinder 1 and the outer wall of the locking sleeve 2. Specifically, grooves are provided at both ends of the inner wall of the locking cylinder 1 for installing the second sealing components 7. The first limiting groove 11 and the second limiting groove 12 are located between the two second sealing components 7, which can prevent dust, mud, sand, etc. from entering the first limiting groove 11 and the second limiting groove 12.

[0083] By providing the first sealing assembly 6 and the second sealing assembly 7, it can be ensured that when the locking sleeve 2 moves between the first limit position and the second limit position, the interior of the locking device is always in a sealed state, thereby preventing foreign matter from entering and wearing out the internal structure.

[0084] Further, see Fig.11 The two first sealing components 6 each include a first dustproof ring 61 and a first waterproof ring 62. The first dustproof ring 61 is disposed on the side of the first waterproof ring 62 that faces away from the first chute 51 and the second chute 52, that is, the first dustproof ring 61 is located on the outside of the first waterproof ring 62, and can filter out dust, and provide a certain degree of protection for the first waterproof ring 62 on the inside.

[0085] See also Figure 5 The two second sealing components 7 each include a second dustproof ring 71 and a second waterproof ring 72. The second dustproof ring 71 is arranged on the side of the second waterproof ring 72 that is away from the first limiting groove and the second limiting groove, that is, the second dustproof ring 71 is arranged at intervals on the outside of the first waterproof ring 62, which can filter out dust to protect the second waterproof ring 72 on the inside.

[0086] Both sealing components include dustproof rings and waterproof rings to enhance the sealing performance of the entire locking device, making it both waterproof and dustproof, preventing sand from the external environment from entering and wearing out the internal structure, causing the locking device to get stuck, and rain, ice and snow from causing rust on the device, resulting in defects such as unlocking or locking not being smooth, thereby reducing the workload of on-site maintenance and inspection.

[0087] See also Figure 5 and Figure 6The locking cylinder 1 is provided with two oil injection channels 13, one of which is in communication with the first limiting groove 11, and the other is in communication with the second limiting groove 12. Lubricating oil can be injected into the first limiting groove 11 and the second limiting groove 12 through the two oil injection channels 13, and a lubricating oil film can be formed between the outer wall of the locking cylinder 1 and the inner wall of the locking sleeve 2. The lubricating oil can enter the locking sleeve 2 through the first through hole 21 and the second through hole 22 on the locking sleeve 2, and then form a lubricating oil film between the inner wall of the locking sleeve 2 and the outer wall of the locking rod 5.

[0088] Optionally, an oil injection nozzle 8 is provided in each of the two oil injection channels 13. Figure 5 The oiling nozzle 8 comprises an oiling nozzle body 81 and a stop ring 82 protruding from the outer wall of the oiling nozzle body 81. The lower end of the oiling nozzle body 81 is inserted and connected in the oiling channel 13, and its inner cavity is connected with the oiling channel 13. The stop ring 82 abuts against the outer wall of the locking cylinder 1 to ensure that the upper end of the oiling nozzle body 81 can be located outside the oiling channel 13, so as to facilitate the injection of lubricating oil.

[0089] See also Figure 1 and Figure 2 The outer wall of the locking cylinder 1 is provided with a lifting ring 14, which is configured to be connected to the base rail through a fixing fixture. The locking sleeve 2 is connected to the point rail through a point rail connector. The outer wall of the locking sleeve 2 is provided with an external thread, and the point rail connector is provided with an internal thread. The locking sleeve 2 is threadedly connected to the point rail connector. Further, see Figure 7 The outer wall of the locking sleeve 2 is provided with a screwing portion 23, which can be clamped by a wrench to thread the locking sleeve 2 and the point rail connector. Figure 1 , Figure 2 and Figure 8 A mechanical interface 55 is provided on the locking rod 5 , and the locking rod 5 is connected to the switch machine through the mechanical interface 55 .

[0090] The specific locking process of the railway turnout external locking device provided in this embodiment is as follows:

[0091] See also Figure 2 , at this time, the locking sleeve 2 is in the first extreme position, and the first locking block 3 is stuck in the first limit groove 11 and is in a locked state. The switch drives the locking rod 5 to move to the left (i.e., the second direction). When the first locking block 3 is aligned with the first slide groove 51 on the locking rod 5, the first locking block 3 slides into the first slide groove 51 along the pushing slope 54 of the first slide groove 51. At the same time, the first locking block 3 disengages from the first limit groove 11 to release the locked state of the first extreme position and complete the unlocking. In the process of the locking rod 5 moving to the left to unlock, the pushing slope 54 in the second slide groove 52 approaches the guide slope 31 on the second locking block 4. When the lock is released, the two just touch each other, see Figure 3Then the locking rod 5 continues to move leftward, so as to push the locking sleeve 2 to move leftward synchronously through the second locking block 4. When the second locking block 4 is aligned with the second limiting groove 12 on the locking cylinder 1, the guiding inclined surface 31 thereon slides along the pushing inclined surface 54 in the second sliding groove 52, and the locking rod 5 pushes the second locking block 4 into the second limiting groove 12. The second locking block 4 is limited between the second limiting groove 12 and the limiting contact surface 53 of the locking rod 5, and the locking of the second extreme position is completed.

[0092] The unlocking and locking process when the locking sleeve 2 moves from the second extreme position to the first extreme position is similar to the above process and will not be described here.

[0093] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A railway turnout external locking device, characterized in that: include: A locking cylinder (1) is connected to the base rail, and the inner wall of the locking cylinder (1) is provided with a first limiting groove (11) and a second limiting groove (12) spaced apart in the axial direction; A locking sleeve (2) is connected to the point rail and is movably inserted into the locking cylinder (1). A first through hole (21) and a second through hole (22) are arranged on the locking sleeve (2) at intervals along the axial direction. Both the first through hole (21) and the second through hole (22) are communicated with the inner cavity of the locking sleeve (2). The locking sleeve (2) has a first extreme position and a second extreme position. a first locking block (3) and a second locking block (4), wherein the first locking block (3) is movably arranged in the first through hole (21) along the radial direction of the locking sleeve (2), and the second locking block (4) is movably arranged in the second through hole (22) along the radial direction of the locking sleeve (2); A locking rod (5) is inserted into the locking sleeve (2); The locking rod (5) can drive the locking sleeve (2) to move along the first direction through the first locking block (3); when the locking sleeve (2) moves to the first extreme position, the first locking block (3) extends out of the first through hole (21) and is clamped in the first limiting groove (11); The locking rod (5) can drive the locking sleeve (2) to move along the second direction through the second locking block (4); when the locking sleeve (2) moves to the second extreme position, the second locking block (4) extends out of the second through hole (22) and is clamped in the second limiting groove (12); the first direction is opposite to the second direction; The locking rod (5) is provided with a first sliding groove (51) and a second sliding groove (52) spaced apart in the axial direction, the first locking block (3) can slide in the first sliding groove (51), and the second locking block (4) can slide in the second sliding groove (52), and the locking rod (5) further comprises a limiting contact surface (53), and the limiting contact surface (53) is located between the first sliding groove (51) and the second sliding groove (52); When the locking sleeve (2) is located at the first extreme position, one side of the first locking block (3) abuts against the bottom of the first limiting groove (11), and the other side abuts against the limiting contact surface (53); one side of the second locking block (4) abuts against the inner wall of the locking cylinder (1), and the other side abuts against the bottom of the second sliding groove (52); When the locking sleeve (2) is located at the second extreme position, one side of the second locking block (4) abuts against the bottom of the second limiting groove (12), and the other side abuts against the limiting contact surface (53); one side of the first locking block (3) abuts against the inner wall of the locking cylinder (1), and the other side abuts against the bottom of the first sliding groove (51); The locking cylinder (1) is provided with two oil injection channels (13), one of which is communicated with the first limiting groove (11), and the other of which is communicated with the second limiting groove (12).

2. The railway turnout external locking device according to claim 1, characterized in that: The groove walls of the first sliding groove (51) and the second sliding groove (52) close to each other are inclined relative to the axis of the locking rod (5) to form a push inclined surface (54), and the first locking block (3) and the second locking block (4) are both provided with a guiding inclined surface (31) on one side close to each other; The pushing inclined surface (54) in the first sliding groove (51) and the guiding inclined surface (31) of the first locking block (3) can be slidably matched to lift the first locking block (3) and push it into the first limiting groove (11); The push inclined surface (54) in the second sliding groove (52) and the guide inclined surface (31) of the second locking block (4) can be slidably matched to lift the second locking block (4) and push it into the second limiting groove (12).

3. The railway turnout external locking device according to claim 1, characterized in that: The first locking block (3) and the second locking block (4) both comprise a first arc surface (32) and a second arc surface (33); the first arc surface (32) can cooperate with the inner wall of the locking cylinder (1); and the second arc surface (33) can cooperate with the limiting contact surface (53).

4. The railway turnout external locking device according to claim 1, characterized in that: The first locking block (3) and the second locking block (4) are both arranged at intervals along the circumference of the locking rod (5); the first through hole (21) and the second through hole (22) are both arranged at intervals along the circumference of the locking sleeve (2); the first locking blocks (3) are arranged in a one-to-one correspondence with the first through holes (21); the second locking blocks (4) are arranged in a one-to-one correspondence with the second through holes (22); the first limiting groove (11) and the second limiting groove (12) are both arranged in a circumferential direction of the locking cylinder (1); and the first sliding groove (51) and the second sliding groove (52) are both arranged in a circumferential direction of the locking rod (5).

5. The railway turnout external locking device according to claim 1, characterized in that: Two first sealing components (6) are sandwiched between the inner wall of the locking sleeve (2) and the outer wall of the locking rod (5), and the first sliding groove (51) and the second sliding groove (52) are located between the two first sealing components (6); Two second sealing components (7) are sandwiched between the inner wall of the locking cylinder (1) and the outer wall of the locking sleeve (2), and the first limiting groove (11) and the second limiting groove (12) are located between the two second sealing components (7).

6. The railway turnout external locking device according to claim 5, characterized in that: The two first sealing components (6) each comprise a first dustproof ring (61) and a first waterproof ring (62), wherein the first dustproof ring (61) is arranged on a side of the first waterproof ring (62) facing away from the first slide groove (51) and the second slide groove (52); The two second sealing assemblies (7) each comprise a second dustproof ring (71) and a second waterproof ring (72), wherein the second dustproof ring (71) is arranged on a side of the second waterproof ring (72) facing away from the first limiting groove (11) and the second limiting groove (12).

7. The railway turnout external locking device according to claim 1, characterized in that: It also includes an oiling nozzle (8), the oiling nozzle (8) including an oiling nozzle body (81) and a stop ring (82) protruding from the outer wall of the oiling nozzle body (81), the oiling nozzle body (81) is inserted and connected in the oiling channel (13), and the stop ring (82) abuts against the outer wall of the locking cylinder (1).

8. The railway turnout external locking device according to any one of claims 1 to 7, characterized in that: The locking cylinder (1) is provided with a lifting ring (14), and the lifting ring (14) is configured to be connected to the base rail through a fixing tool.

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