Ditch cover plate with invisible hanging rings
By designing invisible U-shaped lifting ring and self-locking mechanism on the ditch cover, the problem of insufficient locking of the lifting ring in the prior art affecting pedestrians and achieving improvement of the locking strength and safety performance of the lifting ring without affecting passage.
Patent Information
- Application Number
- CN202421468531.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-06-25
AI Technical Summary
The existing ditch cover hanging ring design is likely to affect pedestrian traffic, and the lack of an effective locking mechanism causes the lifting ring to move up and down or rotate, affecting safety.
A ditch cover plate with invisible suspension ring is designed, which uses a U-shaped suspension ring to slidably connect with two through holes, and is connected through a combined self-locking mechanism of T-shaped slider, spring and wedge-shaped block. The spring force is used to make the suspension ring not protrude from the cover plate without using external force, ensuring safe passage.
It effectively avoids the suspension ring protruding from the cover plate when no external force is used, improves the safety of pedestrian traffic, and increases the locking strength of the suspension ring through the pre-pressure of the spring, ensuring a stable connection between the cover plate and the drain port.
Smart Images
Figure CN222771587U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of municipal engineering, and particularly relates to a ditch cover with invisible hanging rings. Background Art
[0002] Urban road drainage ditches refer to ditches that collect water in low-lying areas near urban roadbeds and are used to drain excess water from urban roads. In order to ensure the safety of pedestrians, frames are installed around the drain outlets and covers are inserted inside the frames to cover the drain outlets, ensuring the safety of passers-by.
[0003] In order to facilitate opening the drain outlet for cleaning and maintenance of the inside of the drain ditch, a lifting ring is generally provided on the cover plate. Most of the existing lifting rings are directly fixed on the cover plate or adhered to the surface of the cover plate by their own gravity. The former will affect the passage of pedestrians because the lifting ring protrudes from the cover plate, and in serious cases, pedestrians may even trip up. The latter lacks a locking mechanism, and the lifting ring is easy to move up and down or rotate, causing it to protrude from the cover plate, which will also affect the passage of pedestrians and even trip up pedestrians. Utility Model Content
[0004] In view of the technical problems in the prior art, the utility model provides a ditch cover with an invisible lifting ring, comprising a cover body and a U-shaped lifting ring installed in a drain outlet of the ditch, wherein the cover body is symmetrically provided with two through holes about the center, and the two ends of the U-shaped lifting ring are slidably installed in the two through holes, and further comprises a lifting ring self-locking mechanism, wherein the lifting ring self-locking mechanism comprises a T-shaped slider, a spring and a wedge block, a T-shaped slide groove is provided at the bottom of the cover body, the T-shaped slide groove is located between the two through holes, the T-shaped slide groove is slidably connected to the T-shaped slide groove, and one end of the spring is fixed to the end of the T-shaped slide groove. The top of the wedge block is fixedly connected, and the other end is fixedly connected to the bottom of the cover body through a stop block. The top of the wedge block is fixedly installed on the bottom of the U-shaped lifting ring, and a wedge-shaped groove cooperating with the wedge block is opened on the bottom surface of the T-shaped sliding block. When the U-shaped lifting ring is subjected to tension, the wedge block moves upward and cooperates with the wedge groove. The spring is in a compressed state, and the top of the U-shaped lifting ring protrudes from the top of the cover body. When the U-shaped lifting ring is not subjected to tension, the wedge block moves downward under the elastic force of the spring and separates from the wedge groove, and the top of the U-shaped lifting ring is in contact with the top of the cover body.
[0005] Furthermore, the lifting ring self-locking mechanism also includes a telescopic rod, which is installed in the spring, and the two ends of the telescopic rod are respectively fixedly connected to the end of the T-shaped slider and the end of the T-shaped slide groove.
[0006] Furthermore, a stop block is provided in the T-shaped slide groove, and the stop block is installed at one end of the T-shaped slider away from the spring. When the T-shaped slider contacts the stop block, the top end of the wedge block is located in the wedge groove, and the spring is in a compressed state.
[0007] Furthermore, the lifting ring self-locking mechanism also includes a connecting rod, a threaded hole is provided at one end of the T-shaped slider away from the spring, a connecting hole is opened on the side wall of the drain outlet, one end of the connecting rod is threadedly screwed with the threaded hole, and the other end of the connecting rod is engaged with or separated from the connecting hole under the action of the elastic force of the spring and the tension of the U-shaped lifting ring.
[0008] Furthermore, the lifting ring self-locking mechanism includes two lifting ring self-locking mechanisms, which are arranged between the two through holes at intervals and are centrally symmetrical about the center of the cover plate body.
[0009] Furthermore, the wedge blocks of the two lifting ring self-locking mechanisms are connected by a fixing rod, a connecting spring is provided between the fixing rod and the bottom of the cover body, and two ends of the connecting spring are fixedly connected to the fixing rod and the cover body respectively.
[0010] Furthermore, a connecting groove and a connecting block are provided on the side of the T-shaped slider, and the connecting groove and the connecting block are respectively located on both sides of the wedge-shaped groove, and the connecting block on one of the T-shaped sliders is slidably matched with the connecting groove on the other T-shaped slider.
[0011] Furthermore, a notch is provided on the top of the cover body for easy insertion of fingers, and the notch is located on both sides of the top of the U-shaped hanging ring and is connected to the U-shaped hanging ring.
[0012] Furthermore, the T-shaped sliding block is provided with a plurality of mounting grooves, the mounting grooves are connected with the T-shaped sliding grooves, rollers are rotatably provided in the mounting grooves, and the rotation direction of the rollers is consistent with the groove direction of the T-shaped sliding grooves.
[0013] Beneficial effects:
[0014] The U-shaped lifting ring is a key component of the U-shaped lifting ring, and the U-shaped lifting ring is a key component of the U-shaped lifting ring. ... Because the T-shaped slider is always affected by the elastic force of the spring during movement, the wedge block and the U-shaped ring will not move under the action of non-artificial external force, so that the top of the U-shaped ring will not protrude from the top of the cover body, thereby effectively ensuring that the U-shaped ring will not affect the passage of pedestrians.
[0015] 2. In the utility model, the arrangement of the telescopic rod can further ensure the linear movement of the spring and the T-shaped slider; the arrangement of the stop block can limit the sliding displacement of the T-shaped slider. When the T-shaped slider contacts the stop block, the top end of the wedge block is located in the wedge groove, and the arrangement of the spring in a compressed state can prevent the wedge block from completely disengaging from the wedge groove, so that when the wedge block moves up, it can conveniently and effectively squeeze the T-shaped slider. In addition, it can also ensure that the spring always has a certain pre-pressure, thereby improving the locking strength of the U-shaped lifting ring.
[0016] 3. In the present invention, the connection strength between the cover body and the drain outlet can be improved by setting the connecting rod and the connecting hole. Specifically, when the spring is at a free length, that is, the top of the U-shaped lifting ring is in contact with the top of the cover body, the connecting rod will slide out of the cover body and cooperate with the connecting hole under the drive of the T-shaped slider. At this time, it is equivalent to locking the cover body, so that the cover body and the drain outlet are connected as a whole. Under the premise of not unlocking, the cover body will basically not be opened. When the U-shaped lifting ring is pulled up by external force, the T-shaped slider will drive the connecting rod to separate from the connecting hole. At this time, unlocking can be achieved. Combined with the setting of threaded engagement, it can meet the use of drain outlets of different sizes.
[0017] 4. In the utility model, by setting two lifting ring self-locking mechanisms that are centrally symmetrical about the center of the cover body, the connection strength between the cover body and the drain outlet can be further improved; by setting the fixing rod and the connecting spring, the locking strength of the U-shaped lifting ring can be further improved, and at the same time, the speed at which the U-shaped lifting ring moves down and out of the wedge groove can be increased; by setting the connecting groove and the connecting block, the two T-shaped sliding blocks can be made into a whole in their length direction, and combined with the matching setting of the connecting rod and the connecting hole, they can be combined into a support rod to support the cover body, thereby improving the supporting strength of the cover body and effectively preventing the cover body from being damaged due to long-term use or excessive force. The matching of two sets of connecting grooves and connecting blocks can further improve the connection strength.
[0018] 5. In the present invention, the setting of the notch can facilitate the fingers to apply external force to the U-shaped lifting ring; the setting of the mounting groove and the roller can reduce the friction resistance between the T-shaped slider and the T-shaped sliding groove, thereby achieving a labor-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 This is a schematic diagram of the overall installation structure when the U-shaped lifting ring of the utility model does not protrude from the top of the cover plate body;
[0021] Figure 2 This is a schematic diagram of the overall installation structure when the U-shaped lifting ring of the utility model protrudes from the top of the cover plate body;
[0022] Figure 3 This is a cross-sectional view of the installation structure of the cover plate body and the drain outlet of the utility model;
[0023] Figure 4 This is a schematic diagram of the installation structure when the wedge-shaped block and the wedge-shaped groove of the utility model are separated;
[0024] Figure 5 This is a schematic diagram of the installation structure when the wedge-shaped block and the wedge-shaped groove of the utility model are fully matched;
[0025] Figure 6 for Figure 4 Detailed structural diagram at A in the middle;
[0026] Figure 7 This is a schematic diagram of the T-shaped slideway and through hole installation structure of the utility model;
[0027] Figure 8 for Figure 7 Half-section view of the middle T-shaped chute;
[0028] Fig. 9 This is a schematic diagram of the installation structure of the U-shaped lifting ring and the wedge block of the utility model;
[0029] Fig.10 It is a schematic diagram of the notch installation structure of the utility model.
[0030] Description of reference numerals:
[0031] 100. Drain outlet; 1. Cover plate body; 2. U-shaped lifting ring; 3. Through hole; 4. T-shaped slider; 5. Spring; 6. Wedge block; 7. T-shaped slide groove; 8. Wedge groove; 9. Telescopic rod; 10. Stop block; 11. Connecting rod; 12. Threaded hole; 13. Connecting hole; 14. Fixing rod; 15. Connecting spring; 16. Connecting groove; 17. Connecting block; 18. Notch. DETAILED DESCRIPTION
[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0035] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0036] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.
[0038] The utility model provides a ditch cover with invisible lifting rings, such as Figures 1 to 9As shown, it includes a cover body 1 and a U-shaped lifting ring 2 installed in a ditch drain outlet 100, the cover body 1 is symmetrically provided with two through holes 3 about the center, and the two ends of the U-shaped lifting ring 2 are slidably installed in the two through holes 3, wherein two or more U-shaped lifting rings 2 can be provided according to the length of the cover body 1, and also includes a lifting ring self-locking mechanism, the lifting ring self-locking mechanism corresponds to the U-shaped lifting ring 2, the lifting ring self-locking mechanism includes a T-shaped slider 4, a spring 5 and a wedge block 6, the bottom of the cover body 1 is provided with a T-shaped slide groove 7, the T-shaped slide groove 7 is located between the two through holes 3, the T-shaped slide block 4 is slidably connected to the T-shaped slide groove 7, and one end of the spring 5 is fixed to the end of the T-shaped slide block 4 The top of the wedge block 6 is fixedly mounted on the bottom of the U-shaped lifting ring 2, wherein the wedge block 6 is a structure with a small top and a large bottom. A wedge-shaped groove 8 cooperating with the wedge block 6 is provided on the bottom surface of the T-shaped sliding block 4. When the U-shaped lifting ring 2 is subjected to tension, the wedge block 6 moves upward and cooperates with the wedge-shaped groove 8, and the spring 5 is in a compressed state. The top of the U-shaped lifting ring 2 protrudes from the top of the cover body 1. When the U-shaped lifting ring 2 is not subjected to tension, the wedge block 6 moves downward under the elastic force of the spring 5 and separates from the wedge-shaped groove 8, and the top of the U-shaped lifting ring 2 fits with the top of the cover body 1.
[0039] The U-shaped lifting ring 2 is preferably used to lift the lid 100, so that the lid 100 can be easily unlocked and the user can easily get out of the way. The contact is stopped. At this time, the top of the U-shaped lifting ring 2 protrudes from the top of the cover body 1, and a lifting space convenient for handholding is formed between the two. When maintenance and cleaning are completed, it is only necessary to release the external force on the U-shaped lifting ring 2. At this time, the U-shaped lifting ring 2 will drive the wedge block 6 to move down and disengage from the wedge groove 8 under the action of its own gravity. At the same time, due to the removal of the external force, the spring 5 will restore its original length and drive the T-shaped sliding block 4 to move along the T-shaped sliding groove 7. Under the squeezing action of the T-shaped sliding block 4, the wedge block 6 will further move down and gradually disengage from the wedge groove 8 until the spring 5 restores its free length. Since the T-shaped sliding block 4 is always affected by the elastic force of the spring 5 during the movement, the wedge block 6 and the U-shaped lifting ring 2 will not move under the action of non-artificial external force, so that the top of the U-shaped lifting ring 2 will not protrude from the top of the cover body 1, thereby effectively ensuring that the U-shaped lifting ring 2 will not affect the passage of pedestrians.
[0040] In the present invention, preferably, Figure 4 , Figure 7 and Figure 8 As shown, the lifting ring self-locking mechanism also includes a telescopic rod 9, which is installed in the spring 5, and the two ends of the telescopic rod 9 are respectively fixedly connected to the end of the T-shaped slider 4 and the end of the T-shaped slide groove 7; a stop block 10 is provided in the T-shaped slide groove 7, and the stop block 10 is installed at the end of the T-shaped slider 4 away from the spring 5. When the T-shaped slider 4 contacts the stop block 10, the top end of the wedge block 6 is located in the wedge groove 8, and the spring 5 is in a compressed state.
[0041] In this embodiment, by setting the telescopic rod 9, the linear movement of the spring 5 and the T-shaped slider 4 can be further ensured; by setting the stop block 10, the sliding displacement of the T-shaped slider 4 can be limited. When the T-shaped slider 4 contacts the stop block 10, the top of the wedge block 6 is located in the wedge groove 8, and the spring 5 is in a compressed state. This can prevent the wedge block 6 from completely disengaging from the wedge groove 8, so that when the wedge block 6 moves up, it can conveniently and effectively squeeze the T-shaped slider 4. In addition, it can also ensure that the spring 5 always has a certain pre-pressure, thereby improving the locking strength of the U-shaped lifting ring 2.
[0042] In the present invention, preferably, Figure 3 , Figure 4 and Figure 5 As shown, the lifting ring self-locking mechanism also includes a connecting rod 11, a threaded hole 12 is provided at one end of the T-shaped slider 4 away from the spring 5, a connecting hole 13 is opened on the side wall of the drain outlet 100, one end of the connecting rod 11 is threadedly engaged with the threaded hole 12, and the other end of the connecting rod 11 is engaged with or separated from the connecting hole 13 under the elastic force of the spring 5 and the tension of the U-shaped lifting ring 2.
[0043] In this embodiment, the connection strength between the cover body 1 and the drain outlet 100 can be improved by setting the connecting rod 11 and the connecting hole 13. Specifically, when the spring 5 is at a free length, that is, the top of the U-shaped ring 2 is in contact with the top of the cover body 1, the connecting rod 11 will slide out of the cover body 1 and cooperate with the connecting hole 13 under the drive of the T-shaped slider 4. At this time, it is equivalent to locking the cover body 1, so that the cover body 1 and the drain outlet 100 are connected as a whole. Under the premise of not unlocking, the cover body 1 will basically not be opened. When the U-shaped ring 2 is pulled up with external force, the T-shaped slider 4 will drive the connecting rod 11 to separate from the connecting hole 13. At this time, unlocking can be achieved. Combined with the setting of threaded engagement, it can meet the use of drain outlets 100 of different sizes.
[0044] In the present invention, preferably, Figure 4 , Figure 5 , Figure 6 , Figure 7 and Fig. 9As shown, the lifting ring self-locking mechanism includes two, that is, one U-shaped lifting ring 2 matches two lifting ring self-locking mechanisms, the two lifting ring self-locking mechanisms are arranged between the two through holes 3 at intervals, and are centrally symmetrical about the center of the cover body 1, that is, the two T-shaped sliders 4 slide in opposite directions under the action of their respective springs 5 or wedge blocks 6; the wedge blocks 6 of the two lifting ring self-locking mechanisms are connected by a fixing rod 14, and a connecting spring 15 is provided between the fixing rod 14 and the bottom of the cover body 1, and the two ends of the connecting spring 15 are fixedly connected to the fixing rod 14 and the cover body 1 respectively; a connecting groove 16 and a connecting block 17 are provided on the side of the T-shaped slider 4, and the connecting groove 16 and the connecting block 17 are respectively located on both sides of the wedge groove 8, and the connecting block 17 on one of the T-shaped sliders 4 is slidably matched with the connecting groove 16 on the other T-shaped slider 4, and the sliding direction is the extension and contraction direction of the spring 5.
[0045] In this embodiment, by setting two lifting ring self-locking mechanisms that are centrally symmetrical about the center of the cover body 1, the connection strength between the cover body 1 and the drain outlet 100 can be further improved; by setting the fixing rod 14 and the connecting spring 15, the locking strength of the U-shaped lifting ring 2 can be further improved, and at the same time, the rate at which the U-shaped lifting ring 2 moves down and out of the wedge-shaped groove 8 can be increased; by setting the connecting groove 16 and the connecting block 17, the two T-shaped sliders 4 can be made into a whole in their length direction, and combined with the matching setting of the connecting rod 11 and the connecting hole 13, they can be combined into a support rod to support the cover body 1, thereby improving the support strength of the cover body 1 and effectively preventing the cover body 1 from being damaged due to long-term use or excessive force. The matching of two sets of connecting grooves 16 and connecting blocks 17 can further improve the connection strength.
[0046] In the present invention, preferably, Figure 1 , Figure 2 and Fig.10 As shown, a notch 18 for inserting fingers is provided on the top of the cover body 1 , and the notch 18 is located on both sides of the top of the U-shaped hanging ring 2 and is connected to the U-shaped hanging ring 2 .
[0047] In this embodiment, the notch 18 is provided to facilitate fingers to apply external force to the U-shaped hanging ring 2 .
[0048] In the present invention, preferably, Figure 4 , Figure 7 and Figure 8 As shown, the T-shaped slider 4 is provided with a plurality of mounting grooves, the mounting grooves are connected with the T-shaped slide groove 7 , a roller is rotatably provided in the mounting groove, and the rotation direction of the roller is consistent with the groove direction of the T-shaped slide groove 7 .
[0049] In this embodiment, by providing the mounting groove and the roller, the friction resistance between the T-shaped sliding block 4 and the T-shaped sliding groove 7 can be reduced, thereby achieving a labor-saving effect.
[0050] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0051] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.
Claims
1. A ditch cover with invisible lifting ring, comprising a cover body (1) installed in a ditch drain outlet (100) and a U-shaped lifting ring (2), wherein the cover body (1) is provided with two through holes (3) symmetrically about the center, and the two ends of the U-shaped lifting ring (2) are slidably installed in the two through holes (3), characterized in that: The invention also comprises a lifting ring self-locking mechanism, wherein the lifting ring self-locking mechanism comprises a T-shaped slider (4), a spring (5) and a wedge block (6); a T-shaped slide groove (7) is provided at the bottom of the cover plate body (1); the T-shaped slide groove (7) is located between the two through holes (3); the T-shaped slider (4) is slidably connected to the T-shaped slide groove (7); one end of the spring (5) is fixedly connected to the end of the T-shaped slider (4); the other end is fixedly connected to the bottom of the cover plate body (1) through a stop block; the top end of the wedge block (6) is fixedly installed on the bottom of the U-shaped lifting ring (2); the T A wedge-shaped groove (8) cooperating with the wedge block (6) is provided on the bottom surface of the U-shaped slider (4); when the U-shaped lifting ring (2) is subjected to a tensile force, the wedge block (6) moves upward to cooperate with the wedge-shaped groove (8); the spring (5) is in a compressed state; the top of the U-shaped lifting ring (2) protrudes from the top of the cover plate body (1); when the U-shaped lifting ring (2) is not subjected to a tensile force, the wedge block (6) moves downward under the elastic force of the spring (5) to separate from the wedge-shaped groove (8); the top of the U-shaped lifting ring (2) is in contact with the top of the cover plate body (1).
2. A ditch cover with invisible lifting ring according to claim 1, characterized in that: The lifting ring self-locking mechanism also includes a telescopic rod (9), which is installed in the spring (5), and the two ends of the telescopic rod (9) are respectively fixedly connected to the end of the T-shaped slider (4) and the end of the T-shaped slide groove (7).
3. A ditch cover with invisible lifting ring according to claim 1 or 2, characterized in that: A stop block (10) is provided in the T-shaped slide groove (7), and the stop block (10) is installed at one end of the T-shaped slide block (4) away from the spring (5). When the T-shaped slide block (4) contacts the stop block (10), the top end of the wedge block (6) is located in the wedge groove (8), and the spring (5) is in a compressed state.
4. The ditch cover with invisible lifting ring according to claim 3 is characterized in that: The lifting ring self-locking mechanism also includes a connecting rod (11), a threaded hole (12) is provided at one end of the T-shaped sliding block (4) away from the spring (5), a connecting hole (13) is provided on the side wall of the drain outlet (100), one end of the connecting rod (11) is threadedly engaged with the threaded hole (12), and the other end of the connecting rod (11) is engaged with or separated from the connecting hole (13) under the action of the elastic force of the spring (5) and the tension of the U-shaped lifting ring (2).
5. The ditch cover with invisible lifting ring according to claim 4, characterized in that: The lifting ring self-locking mechanisms include two lifting ring self-locking mechanisms, which are arranged between two through holes (3) at intervals and are centrally symmetrical about the center of the cover plate body (1).
6. The ditch cover with invisible lifting ring according to claim 5, characterized in that: The wedge blocks (6) of the two lifting ring self-locking mechanisms are connected via a fixing rod (14), a connecting spring (15) is provided between the fixing rod (14) and the bottom of the cover plate body (1), and the two ends of the connecting spring (15) are fixedly connected to the fixing rod (14) and the cover plate body (1), respectively.
7. The ditch cover with invisible lifting ring according to claim 6, characterized in that: A connecting groove (16) and a connecting block (17) are provided on the side of the T-shaped slider (4), and the connecting groove (16) and the connecting block (17) are respectively located on both sides of the wedge-shaped groove (8), and the connecting block (17) on one of the T-shaped sliders (4) and the connecting groove (16) on the other T-shaped slider (4) are slidably matched.
8. The ditch cover with invisible lifting ring according to claim 1, characterized in that: A notch (18) is provided on the top of the cover plate body (1) for easy insertion of fingers, and the notch (18) is located on both sides of the top of the U-shaped hanging ring (2) and is connected to the U-shaped hanging ring (2).
9. The ditch cover with invisible lifting ring according to claim 1, characterized in that: The T-shaped slide block (4) is provided with a plurality of mounting grooves, the mounting grooves being in communication with the T-shaped slide groove (7), and rollers being rotatably arranged in the mounting grooves, the rotation direction of the rollers being consistent with the groove direction of the T-shaped slide groove (7).