Guide groove cover plate plug pin device and guide groove

Abstract

The utility model discloses a diversion trench cover plate bolt device and a diversion trench. The diversion trench cover plate bolt device comprises a structure body, a guide cylinder, a lifting pull rod and a telescopic structure. The structure body comprises a cover plate with a center hole and a cylinder with two communicated ends, and the cover plate is arranged at one end of the cylinder. A plurality of guide channels are evenly arranged on the side wall of the cylinder, and the telescopic structure is provided with a plurality of plug connectors corresponding to the guide channels respectively. The guide cylinder penetrates through the center hole and then is fixed to the cover plate, and the lifting pull rod penetrates through the guide cylinder and can axially move relative to the guide cylinder. One end of the lifting pull rod extends towards the side away from the telescopic structure, the other end of the lifting pull rod is used for being connected with the telescopic structure, and the lifting pull rod is used for driving a plug connector of the telescopic structure to move along the inner wall of the guide channel so as to move outwards through the plug connector and be connected with a corresponding structure of the corresponding diversion trench cover plate to be spliced. And the plurality of diversion trench cover plates to be spliced are fixed. The device can lock a plurality of half diversion trench cover plates at the same time, so that the diversion trench cover plates are safe and reliable.

Description

Technical Field

[0001] The utility model relates to the field of launch vehicles, in particular to a guide groove cover plate latch device and a guide groove. Background Art

[0002] At present, domestic commercial aerospace is developing rapidly, and various types of rockets are coming on the market. For example, a large liquid rocket of a certain rocket company adopts the "new three-level" test and launch mode, that is, after the first and second stage assembly is horizontally transferred from the technical area to the launch area, the rocket is docked and erected with the launch pad. The diameter of a large liquid rocket is large, and the traditional 4-point arrow foot support cannot meet the requirements on the arrow, so it is necessary to add multiple auxiliary supports on the launch pad.

[0003] The existing guide trough cover plates are a plurality of semi-open structures, and each cover plate needs to be driven and locked separately, which is time-consuming, labor-intensive and has low reliability.

[0004] Therefore, it is urgent to design a locking device that can lock multiple half-guide trough covers at the same time, so that the guide trough covers are safe and reliable, ensuring the personal safety of personnel when working on the guide trough covers and improving work efficiency. Summary of the invention

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a guide trough cover plate latch device that can lock multiple half guide trough cover plates at the same time, making the guide trough cover plates safe and reliable, ensuring the personal safety of personnel when working on the guide trough cover plates, and improving work efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a guide groove cover plate latch device, comprising a structural body, a guide cylinder, a lifting rod and a telescopic structure, wherein:

[0007] The structural body comprises a cover plate with a central hole and a cylinder with two ends communicating with each other, the cover plate is arranged at one end of the cylinder, a plurality of guide channels are evenly arranged on the side wall of the cylinder, and the telescopic structure is provided with a plurality of plug-in parts respectively corresponding to each guide channel;

[0008] The guide cylinder is fixed on the cover plate after passing through the center hole, the lifting rod passes through the guide cylinder and can move axially relative to the guide cylinder, one end of the lifting rod extends to the side away from the telescopic structure, and the other end is used to connect with the telescopic structure, the lifting rod is used to drive the connector of the telescopic structure to move along the inner wall of the guide channel, so as to move outward through the connector and connect with the corresponding structure of the corresponding guide trough cover plate to be spliced, so that multiple guide trough cover plates to be spliced ​​are fixed.

[0009] Furthermore, a plurality of weight-reducing holes are evenly arranged on the surface of the cylinder.

[0010] Furthermore, the lifting rod includes a main rod, a limit piece and a plurality of lifting rod ears; the limit piece and the lifting rod ears are respectively arranged at two ends of the main rod, wherein the limit piece is sleeved on the main rod and fixedly connected to the main rod, and the limit piece is used to cooperate with the upper end surface of the guide cylinder to limit the downward movement limit position of the main rod; the plurality of lifting rod ears are evenly arranged along the circumference of the main rod and one end is connected to the surface of the main rod, and the other end is connected to the telescopic structure; the main rod is used to drive the movement of the telescopic structure by driving the lifting rod ears to move.

[0011] Furthermore, the limiting member is a limiting nut, and is fixedly connected to the main rod via internal and external threads.

[0012] Furthermore, the lifting rod ear is a long strip structure, and one end is provided with an inner concave surface matching the main rod surface, and the other end is a semicircular protrusion; the semicircular protrusion protrudes away from the inner concave surface, and a first connecting hole is also provided on the lifting rod ear located on one side of the semicircular protrusion.

[0013] Furthermore, the telescopic structure includes a plurality of sets of actuators corresponding to the lifting rod ears respectively, each actuator includes a pushing link, a first connecting shaft, a second connecting shaft and the connector, and the connector is a cover plate latch; wherein, one end of the pushing link is connected to the cover plate latch through the first connecting shaft, and the other end is connected to the lifting rod ear through the second connecting shaft, and the two ends of the pushing link are rotatable relative to the first connecting shaft and the second connecting shaft respectively, and the lifting rod drives the pushing link to move by moving up and down, so that the cover plate latch can be retracted or extended along the guide channel.

[0014] Furthermore, it also includes a cover latch guide cylinder, wherein the cover latch guide cylinder is arranged at one end of the cover latch away from the pushing connecting rod, the outer wall of the cover latch guide cylinder is tightly attached to the inner wall of the guide channel, and the cover latch is slidably arranged in the cover latch guide cylinder.

[0015] Furthermore, the pushing link is a long plate structure with convex parts at both ends, and the two convex parts are both provided with recessed parts which are concave toward one side of the center of the pushing link and respectively match the lifting rod ear and the cover plate latch connecting end and have a second connecting hole; one end of the lifting rod ear is inserted into the recessed part close to it and the two are connected through the second connecting shaft, and the cover plate latch is inserted into the recessed part close to it and the two are connected through the first connecting shaft.

[0016] Furthermore, both ends of the first connecting shaft and the second connecting shaft are provided with annular limit grooves and limit retaining rings matching the annular limit grooves. After the first connecting shaft passes through the pushing connecting rod and the connector and after the second connecting shaft passes through the pushing connecting rod and the lifting rod ear, the limit retaining rings are respectively installed in the annular limit grooves to prevent the first connecting shaft and the second connecting shaft from moving along their axial directions.

[0017] Another aspect of the utility model provides a guide trough, comprising a plurality of cover plates to be spliced, a fixing seat and a guide trough cover plate latch device, wherein the fixing seat is fixedly connected to the cover plates to be spliced, and the fixing seat is provided with a fixing hole for matching with the plug-in component, and the lifting rod is used to drive the plug-in component of the telescopic structure to move along the inner wall of the guide channel so that the plug-in component moves outward and connects with the corresponding fixing hole, thereby completing the fixation of multiple guide trough cover plates to be spliced.

[0018] Compared with the prior art, the utility model has at least one of the following beneficial effects:

[0019] A guide trough cover plate latch device of the present application drives a telescopic structure connector to move along the inner wall of a guide channel through a lifting rod, and moves the lifting rod downward to move the connector outward, thereby completing the corresponding structural connection between the connector and the corresponding guide trough cover plates to be spliced, thereby completing the fixation of multiple guide trough cover plates to be spliced.

[0020] A guide trough cover plate latch device in one embodiment of the present application is fixed on the cover plate after a guide cylinder passes through a center hole, which facilitates the precise movement of the lifting rod along the axial direction of the guide cylinder while also ensuring that the guide cylinder is firmly fixed to prevent the guide cylinder from moving and affecting the working efficiency of the lifting rod, thereby facilitating the quick connection of the connector and the guide trough cover to be spliced.

[0021] The guide trough cover plate latch device of the embodiment of the present application can lock multiple half guide trough cover plates at the same time, which not only ensures the safety of operators but also significantly improves the cover plate splicing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the guide groove cover plate latch device of the utility model when it is retracted;

[0023] Figure 2 This is a schematic cross-sectional view of the guide trough cover latch device of the utility model when it is retracted;

[0024] Figure 3 It is a three-dimensional diagram of the guide groove cover plate latch device of the utility model when it is extended;

[0025] Figure 4It is a cross-sectional diagram of the guide groove cover latch device of the utility model when it is extended;

[0026] Figure 5 It is a top view of the connection between the guide groove cover plate latch device and the guide groove cover plate of the utility model;

[0027] Figure 6 It is a simplified structural diagram of the limit retaining ring of the utility model.

[0028] Description of reference numerals:

[0029] 1Structural body 2Guide tube

[0030] 3 lifting rod 4 guide groove cover to be spliced

[0031] 5 weight reduction holes 6 main rod

[0032] 7 limiter 8 lifting rod ear

[0033] 9 Push connecting rod 10 Cover plate latch guide cylinder

[0034] 11 Cover plate latch 12 Limit retaining ring

[0035] 13 Fixed seat DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clearly understood, the spirit of the contents disclosed in the present invention will be clearly explained with the accompanying drawings and detailed descriptions below. After understanding the embodiments of the contents of the present invention, any technician in the relevant technical field can change and modify the contents of the present invention according to the techniques taught by the contents of the present invention without departing from the spirit and scope of the contents of the present invention.

[0037] The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention. In addition, the same or similar reference numerals used in the drawings and embodiments are used to represent the same or similar parts.

[0038] The terms “first”, “second”, etc. used in this document do not particularly refer to an order or sequence, nor are they used to limit the present invention. They are only used to distinguish elements or operations described with the same technical terms.

[0039] The directional terms used in this document, such as up, down, left, right, front or back, etc., are only used to refer to the directions of the drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention.

[0040] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0041] As used herein, "and / or" includes any or all combinations of the items described.

[0042] The terms "substantially" and "approximately" used herein are used to modify any quantity or error that may vary slightly, but these slight changes or errors do not change their essence. Generally speaking, the range of slight changes or errors modified by such terms may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. Those skilled in the art should understand that the aforementioned values ​​can be adjusted according to actual needs and are not limited thereto.

[0043] Certain terms used to describe the present application are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art regarding the description of the present application.

[0044] The "new three-level" test and launch mode for large liquid rockets usually requires additional support points. The launch pad guide trough cover is limited by the support position, so the launch pad guide trough cover cannot adopt a pull-out structure. Therefore, for the launch pad of a large liquid rocket, it is usually necessary to make the launch pad guide trough cover into multiple semi-open structures, and each semi-open structure requires an independent drive device to open and close the semi-open structure. In addition, in order to ensure the safety of the operating personnel when the guide trough cover is closed, the guide trough cover composed of multiple semi-open structures needs to be mechanically locked.

[0045] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The embodiment of the utility model provides a guide groove cover plate latch device, comprising a structural body 1, a guide cylinder 2, a lifting rod 3 and a telescopic structure. The structural body 1 comprises a cover plate with a center hole (the cover plate with a center hole referred to in this application is a part of the structural body 1, not the guide groove cover plate 4 to be spliced) and a cylinder with two ends connected. The cover plate is arranged at one end of the cylinder, and a plurality of guide channels are evenly arranged on the side wall of the cylinder, and the telescopic structure is provided with a plurality of plug-in parts corresponding to each guide channel.

[0046] The guide cylinder 2 passes through the center hole and is fixed on the cover plate. The lifting rod 3 passes through the guide cylinder 2 and can move axially relative to the guide cylinder 2. One end of the lifting rod 3 extends to the side away from the telescopic structure, and the other end is used to connect with the telescopic structure. The lifting rod 3 can drive the plug-in component of the telescopic structure to move along the inner wall of the guide channel, so as to move outward through the plug-in component and connect with the corresponding structure of the corresponding guide groove cover plate 4 to be spliced, so that multiple guide groove cover plates 4 to be spliced ​​are fixed.

[0047] Specifically, a guide trough cover plate latch device of the present application can drive the connector of the telescopic structure to move bidirectionally along the inner wall of the guide channel through the lifting rod 3. The lifting rod 3 moves downward to move the connector outward, thereby completing the corresponding structural connection between the connector and the corresponding guide trough cover plate 4 to be spliced, and completing the fixation of multiple guide trough cover plates 4 to be spliced. In addition, the guide cylinder 2 is fixed on the cover plate after passing through the center hole, which facilitates the precise movement of the lifting rod 3 along the axial direction of the guide cylinder, while also ensuring that the guide cylinder 2 is firmly fixed, avoiding the guide cylinder 2 from affecting the working efficiency of the lifting rod due to movement, so that the connector and the guide trough cover plate 4 to be spliced ​​can be reliably and quickly connected. The guide trough cover plate latch device of the present application can lock multiple semi-guide trough cover plates at the same time, so that multiple guide trough cover plates 4 to be spliced ​​are connected as one (multiple guide trough cover plates to be spliced ​​are spliced ​​together to form a Figure 5 The circular ring structure shown). When the support of one of the guide trough cover plates 4 to be spliced ​​fails, the other guide trough cover plates to be spliced ​​can be relied on to bear the weight through the latch, so that the guide trough cover plate is safe and reliable, and the personal safety of the operator when working on the guide trough cover plate is ensured. In addition, the guide trough cover plate latch device of the present application adopts the design method of the latch device, which is convenient for personnel to quickly lock and withdraw the cover plate, shortening the preparation time for personnel evacuation before rocket refueling and improving the launch efficiency.

[0048] It should be noted that, in order to reduce the weight of the cylinder and facilitate installation, for example, a plurality of weight-reducing holes 5 are evenly arranged on the surface of the cylinder.

[0049] like Figure 1 and Figure 2 As shown, the lifting rod 3 includes a main rod 6, a limiter 7 and a plurality of lifting rod ears 8. The limiter 7 and the lifting rod ears 8 are respectively arranged at the two ends of the main rod 6, wherein the limiter 7 is sleeved on the main rod 6 and fixedly connected to the main rod 6. The limiter 7 is used to cooperate with the upper end surface of the guide cylinder 2 to limit the downward movement limit position of the main rod 6. The lifting rod ears 8 of the plurality of lifting rods 3 are evenly arranged along the circumference of the main rod 6, and one end is connected to the surface of the main rod 6, and the other end is connected to the telescopic structure. The main rod 6 is used to drive the telescopic structure to move by driving the lifting rod 3 ears to move. In addition, in order to prevent the main rod 6 from detaching from the guide cylinder 2 when moving upward, for example, the upper ends of the plurality of lifting rod ears 8 cooperate with the lower end surface of the guide cylinder 2 to limit the upward movement limit position of the main rod 6.

[0050] In the same embodiment, in order to facilitate the fixation of the limiting member 7 and the main rod 6 and prevent the limiting member 7 from moving on the surface of the main rod 6, for example, the limiting member 7 is a limiting nut and is fixedly connected to the main rod 6 via internal and external threads.

[0051] It should be further explained that, in order to ensure the structural stability of the lifting rod ear piece 8, for example, the lifting rod ear piece 8 is a long strip structure. In order to facilitate the connection between the lifting rod ear piece 8 and the main rod 6, for example, one end of the lifting rod ear piece 8 is provided with an inner concave surface matching the surface of the main rod 6 (the outer surface of the main rod 6 is in close contact with the inner concave surface and the two are welded and connected). In order to facilitate the connection between the lifting rod ear piece 8 and the telescopic structure, for example, the other end of the lifting rod ear piece 8 is a semicircular protrusion. The semicircular protrusion protrudes away from the inner concave surface, and a first connecting hole is also provided on the lifting rod ear piece 8 located on one side of the semicircular protrusion.

[0052] In the same embodiment, the telescopic structure includes a plurality of actuators corresponding to the lifting rod ear pieces 8 respectively. For example, each actuator includes a push link 9, a first connecting shaft, a second connecting shaft and a connector. For example, the connector can be a cover plate latch 11. Among them, one end of the push link 9 is connected to the cover plate latch 11 through the first connecting shaft, and the other end is connected to the lifting rod ear piece 8 through the second connecting shaft (the second connecting shaft passes through the first connecting hole). The two ends of the push link 9 are rotatably arranged relative to the first connecting shaft and the second connecting shaft, respectively. Therefore, the lifting rod 3 can move up and down to drive the push link 9 to move, so that the cover plate latch 11 can retract or extend along the guide channel.

[0053] In addition, in order to facilitate the movement of the cover latch 11, for example, a cover latch guide cylinder 10 is further provided at one end of the cover latch 11 away from the push link 9. The outer wall of the cover latch guide cylinder 10 is in close contact with the inner wall of the guide channel, and the cover latch 11 and the cover latch guide cylinder 10 are slidably arranged.

[0054] In this embodiment, in order to ensure the stability of the push link 9 structure, for example, the push link 9 is a long plate structure with convex parts at both ends. In order to facilitate the connection between the lifting rod ear piece 8 and the push link 9, for example, both convex parts of the push link 9 are provided with a recessed part that is concave toward the center of the push link 9 and matches the connection end of the lifting rod ear piece 8 and the cover plate latch 11 and has a second connection hole. After one end of the lifting rod ear piece 8 (containing a semicircular arc protrusion) is inserted into the recessed part close to it, the two are connected through the second connecting shaft, and the cover plate latch 11 is inserted into the recessed part close to it and the two are connected through the first connecting shaft.

[0055] like Figure 1 and Figure 6As shown, in order to prevent the first connecting shaft and the second connecting shaft from axially moving, for example, both ends of the first connecting shaft and the second connecting shaft are provided with an annular limit groove and a limit retaining ring 12 matching the annular limit groove. After the first connecting shaft passes through the pushing connecting rod and the connector, and after the second connecting shaft passes through the pushing connecting rod and the lifting rod ear, the inner side of the limit retaining ring 12 is installed in the annular limit groove, and the outer end face close to the pushing connecting rod 9 is in close contact with the end face of the pushing connecting rod 9 (the end face of the pushing connecting rod 9 close to the limit retaining ring 12) to prevent the first connecting shaft and the second connecting shaft from moving along their axial direction. Another aspect of the utility model provides a guide groove. As Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, it comprises a plurality of cover plates 4 to be spliced, a fixing seat and a guide trough cover plate latch device, wherein the fixing seat 13 is fixedly connected to the cover plates 4 to be spliced, and a fixing hole for matching with the plug-in is provided on the fixing seat 13. The lifting rod 3 is used to drive the plug-in of the telescopic structure to move along the inner wall of the guide channel so that the plug-in moves outward and connects with the corresponding fixing hole to fix the guide trough cover plates to be spliced, thereby completing the fixation of the plurality of guide trough cover plates to be spliced.

[0056] In addition, since the structural body 1 is confined within the circular area limited by the fixing seat 13 (each guide trough cover plate to be spliced ​​is provided with a fixing seat, a plurality of guide trough cover plates to be spliced ​​constitute a circular plate structure as a whole, and a plurality of fixing seats are arranged in a ring to constitute a circular area), the structural body 1 can be prevented from shifting, thereby further improving the reliability of locking the guide trough cover plates.

[0057] The operation is as follows:

[0058] 1. The closing latch of the guide groove cover is retracted.

[0059] like Figure 1 , Figure 2 and Figure 5 As shown, the launch platform guide trough cover is closed, and the guide trough cover latch device lifting rod 3 is lifted to the highest position. The lifting rod ear piece 8 drives the cover latch 11 to retract into the cover latch guide cylinder 10 of the structure body 1 by pushing the connecting rod 9, and the cover latch device is placed just above the middle hole of the guide trough cover (the guide trough cover refers to the entire guide trough cover composed of multiple guide trough cover plates to be spliced).

[0060] 2. Insert the latch and lock it

[0061] like Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, after the cover plate latch device is placed in the middle of the entire guide trough cover plate composed of multiple guide trough cover plates to be spliced, each cover plate latch 11 is aligned with the hole of the corresponding fixing seat 13; the lifting rod 3 is lowered, and the lifting rod ear piece 8 drives the cover plate latch 11 to extend out of the hole of the cover plate latch guide cylinder 10 through the pushing connecting rod 9 and then insert it into the hole of the fixing seat 13, so that the multiple guide trough cover plates 4 to be spliced ​​are locked and connected, so that the multiple guide trough cover plates 4 to be spliced ​​become one.

[0062] The above embodiments can be combined with each other and have corresponding technical effects.

[0063] The above description is only an illustrative specific implementation of the present invention. Without departing from the concept and principle of the present invention, any equivalent changes and modifications made by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A guide groove cover plate latch device, characterized in that: It includes a structural body, a guide cylinder, a lifting rod and a telescopic structure, wherein: The structural body includes a cover plate with a center hole and a cylinder with two ends connected, the cover plate is arranged at one end of the cylinder, and a plurality of guide channels are evenly arranged on the side wall of the cylinder, and the telescopic structure is provided with a plurality of connectors corresponding to each guide channel; the guide cylinder is fixed on the cover plate after passing through the center hole, and the lifting rod passes through the guide cylinder and can move axially relative to the guide cylinder; one end of the lifting rod extends to a side away from the telescopic structure, and the other end is used to connect with the telescopic structure, and the lifting rod is used to drive the connector of the telescopic structure to move along the inner wall of the guide channel, so as to move outward through the connector and connect with the corresponding structure of the corresponding guide trough cover plate to be spliced, so that multiple pieces of guide trough cover plates to be spliced ​​are fixed.

2. The guide groove cover plate latch device according to claim 1, characterized in that: A plurality of weight-reducing holes are evenly arranged on the surface of the cylinder.

3. The guide groove cover plate latch device according to claim 1, characterized in that: The lifting rod comprises a main rod, a limit piece and a plurality of lifting rod ears; the limit piece and the lifting rod ears are respectively arranged at two ends of the main rod, wherein the limit piece is sleeved on the main rod and fixedly connected to the main rod, and the limit piece is used to cooperate with the upper end surface of the guide cylinder to limit the downward movement limit position of the main rod; the plurality of lifting rod ears are evenly arranged along the circumference of the main rod and one end is connected to the surface of the main rod, and the other end is connected to the telescopic structure; the main rod is used to drive the movement of the telescopic structure by driving the lifting rod ears to move.

4. The guide groove cover plate latch device according to claim 3, characterized in that: The limiting member is a limiting nut, and is fixedly connected to the main rod via internal and external threads.

5. The guide groove cover plate latch device according to claim 3, characterized in that: The lifting rod ear is a long strip structure, and one end is provided with an inner concave surface matching the main rod surface, and the other end is a semicircular protrusion; the semicircular protrusion protrudes away from the inner concave surface, and a first connecting hole is also provided on the lifting rod ear located on one side of the semicircular protrusion.

6. The guide groove cover plate latch device according to claim 3, characterized in that: The telescopic structure includes a plurality of actuators corresponding to the lifting rod ears respectively, each actuator includes a push link, a first connecting shaft, a second connecting shaft and the connector, and the connector is a cover plate latch; wherein, one end of the push link is connected to the cover plate latch through the first connecting shaft, and the other end is connected to the lifting rod ear through the second connecting shaft, and the two ends of the push link are rotatable relative to the first connecting shaft and the second connecting shaft respectively, and the lifting rod drives the push link to move by moving up and down, so that the cover plate latch can be retracted or extended along the guide channel.

7. The guide groove cover plate latch device according to claim 6, characterized in that: It also includes a cover latch guide cylinder, wherein the cover latch guide cylinder is arranged at one end of the cover latch away from the pushing connecting rod, the outer wall of the cover latch guide cylinder is tightly attached to the inner wall of the guide channel, and the cover latch is slidably arranged in the cover latch guide cylinder.

8. The guide groove cover plate latch device according to claim 6, characterized in that: The pushing link is a long plate structure with convex parts at both ends, and the two convex parts are both provided with recessed parts which are concave toward one side of the center of the pushing link and respectively match the lifting rod ear and the cover plate latch connecting end and have a second connecting hole; one end of the lifting rod ear is inserted into the recessed part close to it and the two are connected through the second connecting shaft, and the cover plate latch is inserted into the recessed part close to it and the two are connected through the first connecting shaft.

9. The guide groove cover plate latch device according to claim 8, characterized in that: Both ends of the first connecting shaft and the second connecting shaft are provided with annular limit grooves and limit retaining rings matching the annular limit grooves. After the first connecting shaft passes through the pushing connecting rod and the connector and after the second connecting shaft passes through the pushing connecting rod and the lifting rod ear, the limit retaining rings are respectively installed in the annular limit grooves to prevent the first connecting shaft and the second connecting shaft from moving along their axial directions.

10. A guide channel, characterized in that: It comprises a plurality of cover plates to be spliced, a fixing seat and a guide trough cover plate latch device according to any one of claims 1 to 9, wherein the fixing seat is fixedly connected to the cover plates to be spliced, and the fixing seat is provided with a fixing hole for matching with the plug-in component, and the lifting rod is used to drive the plug-in component of the telescopic structure to move along the inner wall of the guide channel so that the plug-in component moves outward and connects with the corresponding fixing hole, thereby completing the fixation of the plurality of guide trough cover plates to be spliced.

Images