Municipal pipeline straightness detection device

Abstract

The municipal pipeline straightness detection device comprises a box-shaped base arranged below a municipal pipeline, the top of the box-shaped base is provided with an opening, a thread driving mechanism is installed between the inner walls of the two sides of the box-shaped base, the top of the thread driving mechanism is fixedly connected with two symmetrically-arranged L-shaped supporting plates, and the L-shaped supporting plates are fixedly connected with the bottom of the box-shaped base. The thread driving mechanism is used for driving the two L-shaped supporting plates to move transversely, the top of the L-shaped supporting plate on the left side is fixedly connected with a first clamping block, and the top of the L-shaped supporting plate on the right side is fixedly provided with a rotation driving mechanism. Through the arrangement of a series of structures, the inner side and the outer side of the clamped and limited municipal pipeline can be detected at the same time, the detection efficiency is improved, when unevenness is detected, an alarm can be given in time to remind personnel, the personnel can make marks in time conveniently, and the detection accuracy is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flatness detection equipment, in particular to a municipal pipeline flatness detection device. Background Technique

[0002] After the production and transportation of municipal pipelines, due to their own and external influences, certain deformations will occur, which will have an adverse impact on subsequent use and installation. Therefore, it is necessary to detect the flatness of the pipeline itself. The existing flatness detection devices often detect the flatness of the pipeline by detecting limited sampling points on the pipeline, resulting in the problem of low detection accuracy. For this reason, the application number: 202221503135.6 discloses a pipeline flatness detection device for municipal construction, including: a detection table, the detection table is fixedly connected with a fixing component, the detection table is fixedly connected with an adjusting component, the adjusting component is fixedly connected with a detection component, and the detection component is movably connected with a roller; the pipe body is fixed by the fixing component, the adjusting component drives the detection component and the roller to rotate to a preset position, after the detection component detects the initial value, the adjusting component drives the detection component and the roller to move linearly, and the detection component calculates the change in distance by detecting the change in pressure, thereby detecting the flatness of the pipe body, which has the advantages of convenient and accurate detection.

[0003] The pipeline flatness detection device disclosed in the above patent can detect the flatness of the inner wall of the pipeline by driving the detection component to move. However, there are still some deficiencies in its use: 1. In order to improve the detection accuracy, it is necessary to detect the inner and outer sides of the pipeline. The detection method of the above patent cannot detect the inner and outer sides of the pipeline at the same time, resulting in low detection efficiency; 2. When the pipeline is detected to be uneven, it cannot timely remind the personnel, so that the personnel cannot timely find the uneven position of the pipeline; Considering the above situation, a new design is needed. Therefore, we propose a municipal pipeline flatness detection device. Content of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art, and to propose a municipal pipeline flatness detection device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A device for detecting the straightness of municipal pipelines, comprising a box-shaped base arranged below the municipal pipeline. The top of the box-shaped base is open. A threaded driving mechanism is installed between the inner walls on both sides of the box-shaped base. The top of the threaded driving mechanism is fixedly connected with two symmetrically arranged L-shaped support plates. The threaded driving mechanism is used to drive the two L-shaped support plates to move horizontally. The top of the left L-shaped support plate is fixedly connected with a first clamping block. A rotary driving mechanism is fixedly installed on the top of the right L-shaped support plate. The right side of the first clamping block and the left side of the rotary driving mechanism are respectively in movable contact with both sides of the municipal pipeline. The first clamping block and the rotary driving mechanism cooperate to limit the left and right positions of the municipal pipeline and can drive the municipal pipeline to rotate through the rotary driving mechanism. Elastic detection mechanisms are respectively in movable contact with the top right side and the top inner wall of the municipal pipeline. The elastic detection mechanisms are used to detect the straightness of the top and the top inner wall of the municipal pipeline. The left sides of the two elastic detection mechanisms are fixedly connected with the same transverse driving mechanism. The transverse driving mechanism is used to drive the two elastic detection mechanisms to move horizontally. The left side of the transverse driving mechanism extends to the left side of the municipal pipeline. The left side of the box-shaped base is fixedly connected with a first support plate. The transverse driving mechanism is fixedly connected with the top of the first support plate. The left side of the first support plate is fixedly connected with a control and alarm mechanism. The control and alarm mechanism is electrically connected with the two elastic detection mechanisms and the transverse driving mechanism. The control and alarm mechanism can be used to alarm and remind personnel.

[0007] Preferably, the threaded driving mechanism includes two screw rods. The two screw rods are respectively rotatably installed on the inner walls on both sides of the box-shaped base. The ends of the two screw rods close to each other are welded together. The thread directions of the two screw rods are opposite. A driving motor is fixedly installed on the right side of the box-shaped base. The left end of the output shaft of the driving motor is fixedly connected with the right end of the right screw rod. A moving block is sleeved on the screw rod. The moving block is threadedly connected with the screw rod in such a way that it can drive the corresponding moving block to move horizontally while the screw rod rotates. The moving block is slidably installed on the bottom inner wall of the box-shaped base. The top of the moving block is fixedly connected with the bottom of the corresponding L-shaped support plate.

[0008] Preferably, the rotary driving mechanism includes a ring. An anti-slip rubber ring is adhesively fixed to the left side of the ring. The left side of the anti-slip rubber ring is in movable contact with the right side of the municipal pipeline. The right side of the ring is fixedly connected with a mounting plate. A support rod is fixedly connected with the top of the right L-shaped support plate. A brake motor is embedded and fixed on the left side of the support rod. The left end of the output shaft of the brake motor is fixedly connected with the right side of the mounting plate. The brake motor and the mounting plate cooperate to drive the ring to rotate.

[0009] Preferably, the elastic detection mechanism includes an installation pipe. The ends of two relatively upper and lower installation pipes away from each other are both provided with plugging structures. A pressing rod is slidably sleeved in the installation pipe. Rollers are rotatably installed on the sides of the two pressing rods close to each other. The adjacent sides of the two rollers are respectively in rolling contact with the top and the inner wall of the top of the municipal pipeline. A pressure sensor is fixedly connected to the inner wall of the installation pipe away from its opening. A compression spring in a compressed state is fixedly connected between the detection end of the pressure sensor and the corresponding pressing rod. The pressure sensor is used to detect the extrusion force of the corresponding compression spring. A push rod is fixedly connected to the right side of the pressing rod. The right end of the push rod extends to the right side of the corresponding installation pipe. The pressing rod can be driven to move vertically through the push rod. The pressure sensor is matched with an external mobile phone APP, and the pressure value detected by the pressure sensor can be viewed through the mobile phone APP.

[0010] Preferably, the lateral driving mechanism includes two cross bars. The first clamping block is slidably sleeved on the two cross bars. The right ends of the two cross bars are respectively fixedly connected to the left sides of the corresponding installation pipes. The left ends of the two cross bars are fixedly connected to the same moving rod located on the left side of the municipal pipeline. A multi-stage electric telescopic rod is fixedly connected to the top of the first support plate. The left end of the output shaft of the multi-stage electric telescopic rod is fixedly connected to the right side of the moving rod. The multi-stage electric telescopic rod is used to drive the moving rod to move horizontally.

[0011] Preferably, the control and alarm mechanism includes a controller and an audible and visual alarm fixedly connected to the left side of the first support plate. The multi-stage electric telescopic rod, the two pressure sensors and the audible and visual alarm are all electrically connected to the controller.

[0012] Preferably, a T-shaped slide rail is fixedly connected to the bottom inner wall of the box-shaped base. T-shaped chutes with openings on both sides are formed at the bottom of the moving block. The two T-shaped chutes are both slidably connected to the T-shaped slide rail. The T-shaped slide rail plays a role of laterally guiding the moving block.

[0013] Compared with the existing technology, the beneficial effects of the present utility model are as follows:

[0014] 1. Through the cooperation of the first clamping block, the ring, the threaded driving mechanism and the two L-shaped support plates, the municipal pipeline can be clamped and limited, and the clamped and limited municipal pipeline can be rotationally adjusted;

[0015] 2. Through the cooperation of the lateral driving mechanism and the two elastic detection mechanisms, the inner and outer sides of the municipal pipeline can be detected simultaneously, improving the detection efficiency;

[0016] 3. Through the cooperation of the pressure sensor and the control and alarm mechanism, when unevenness is detected, it can alarm and remind personnel in time, facilitating personnel to make marks in time and further improving the detection accuracy;

[0017] Through a series of structural settings, the utility model can detect the inner and outer sides of the municipal pipeline after clamping and limiting at the same time, improve the detection efficiency, and can alarm and remind personnel in time when detecting unevenness, which is convenient for personnel to make marks in time and further improve the detection accuracy. Brief Description of the Drawings

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the state where the municipal pipeline of a municipal pipeline straightness detection device proposed by the utility model is not placed;

[0019] Figure 2 It is a main view sectional structural schematic diagram of the state after the municipal pipeline of a municipal pipeline straightness detection device proposed by the utility model is placed;

[0020] Figure 3 It is Figure 2 The enlarged structural schematic diagram of part A in

[0021] In the figure: 100, box-shaped base; 101, municipal pipeline; 1, moving block; 2, screw rod; 3, L-shaped support plate; 4, driving motor; 5, first clamping block; 6, first support plate; 7, ring; 8, brake motor; 9, support rod; 10, cross bar; 11, moving rod; 12, multi-stage electric telescopic rod; 13, controller; 14, sound and light alarm; 15, installation pipe; 16, extrusion rod; 17, pressure sensor; 18, compression spring. Specific Embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0023] Refer to Figures 1-3, A device for detecting the straightness of municipal pipelines, including a box-shaped base 100 arranged below the municipal pipeline 101. The top of the box-shaped base 100 is open. A threaded driving mechanism is installed between the inner walls on both sides of the box-shaped base 100. The top of the threaded driving mechanism is fixedly connected to two symmetrically arranged L-shaped support plates 3. The threaded driving mechanism includes two screw rods 2, and the two screw rods 2 are respectively rotatably installed on the inner walls on both sides of the box-shaped base 100. Circular holes are opened on the inner walls on both sides of the box-shaped base 100, and bearings are fixedly sleeved in the circular holes. The inner side of the inner ring of the bearing is fixedly connected to the outer side of the corresponding screw rod 2. The bearing plays the role of enabling the corresponding screw rod 2 to be rotatably installed. The ends of the two screw rods 2 close to each other are welded. The thread directions of the two screw rods 2 are opposite. A driving motor 4 is fixedly installed on the right side of the box-shaped base 100. The left end of the output shaft of the driving motor 4 is fixedly connected to the right end of the right screw rod 2. A moving block 1 is threadedly sleeved on the screw rod 2. A threaded hole for threaded connection with the corresponding screw rod 2 is opened on the right side of the moving block 1. The moving block 1 and the screw rod 2 are threadedly connected through the threaded hole, and can drive the corresponding moving block 1 to move horizontally while the screw rod 2 rotates. The moving block 1 is slidably installed on the bottom inner wall of the box-shaped base 100. A T-shaped slide rail is fixedly connected to the bottom inner wall of the box-shaped base 100. T-shaped chutes with openings on both sides are opened at the bottom of the moving block 1. Both T-shaped chutes are slidably connected to the T-shaped slide rail. The T-shaped slide rail plays a role of horizontally guiding the moving block 1. The top of the moving block 1 is fixedly connected to the bottom of the corresponding L-shaped support plate 3;

[0024] The top of the left L-shaped support plate 3 is fixedly connected to a first clamping block 5. A rotation driving mechanism is fixedly installed on the top of the right L-shaped support plate 3. The right side of the first clamping block 5 and the left side of the rotation driving mechanism are respectively in movable contact with both sides of the municipal pipeline 101. The rotation driving mechanism includes a ring 7. An anti-slip rubber ring is adhesively fixed to the left side of the ring 7. The left side of the anti-slip rubber ring is in movable contact with the right side of the municipal pipeline 101. The right side of the ring 7 is fixedly connected to a mounting plate. A support rod 9 is fixedly connected to the top of the right L-shaped support plate 3. A brake motor 8 is fixedly installed by embedding on the left side of the support rod 9. An embedding hole for fixedly installing the brake motor 8 is opened on the left side of the support rod 9. The support rod 9 is used to support and fix the brake motor 8. The left end of the output shaft of the brake motor 8 is fixedly connected to the right side of the mounting plate. The brake motor 8 and the mounting plate cooperate to drive the ring 7 to rotate;

[0025] On the right side of the top and the inner wall of the top of the municipal pipeline 101, there are elastic detection mechanisms in movable contact. The elastic detection mechanism includes an installation pipe 15. At the mutually remote ends of two vertically opposite installation pipes 15, a sealing structure is provided. A pressing rod 16 is slidably sleeved in the installation pipe 15. On the mutually close sides of the two pressing rods 16, rollers are rotatably installed. On the mutually close sides of the two pressing rods 16, rotating grooves with openings on both sides are formed. On the front inner wall and the rear inner wall of the rotating groove, supporting bearings are fixedly connected. In two vertically opposite supporting bearings, the same pin shaft is fixedly sleeved. In front of the roller, there is a circular hole. The inner wall of the circular hole is fixedly connected with the outer side of the pin shaft. The supporting bearing and the pin shaft cooperate to achieve the effect of rotatably installing the roller. The mutually close sides of the two rollers are respectively in rolling contact with the top and the inner wall of the top of the municipal pipeline 101. On the inner wall of the end of the installation pipe 15 away from its opening, a pressure sensor 17 is fixedly connected. Between the detection end of the pressure sensor 17 and the corresponding pressing rod 16, a compression spring 18 in a compressed state is fixedly connected. The pressure sensor 17 is used to detect the extrusion force of the corresponding compression spring 18. On the right side of the pressing rod 16, a push rod is fixedly connected. The right end of the push rod extends to the right side of the corresponding installation pipe 15. On the right inner wall of the installation pipe 15, a rectangular through hole is formed. The front inner wall and the rear inner wall of the rectangular through hole are respectively in movable contact with the front side and the rear side of the corresponding push rod. The pressing rod 16 can be driven to move vertically through the push rod. The pressure sensor 17 is matched with an external mobile phone APP. The pressure value detected by the pressure sensor 17 can be viewed through the mobile phone APP;

[0026] On the left sides of the two installation pipes 15, the same transverse driving mechanism is fixedly connected. The left side of the transverse driving mechanism extends to the left side of the municipal pipeline 101. The transverse driving mechanism includes two cross bars 10. The first clamping block 5 is slidably sleeved on the two cross bars 10. On the right side of the first clamping block 5, two rectangular holes are formed. The inner walls of the rectangular holes are in movable contact with the outer sides of the corresponding cross bars 10. The two rectangular holes achieve the effect of laterally guiding the two cross bars 10. The right ends of the two cross bars 10 are respectively fixedly connected with the left sides of the corresponding installation pipes 15. The left ends of the two cross bars 10 are fixedly connected with the same moving rod 11 located on the left side of the municipal pipeline 101. On the left side of the box-shaped base 100, a first support plate 6 is fixedly connected. On the top of the first support plate 6, a multi-stage electric telescopic rod 12 is fixedly connected. The left end of the output shaft of the multi-stage electric telescopic rod 12 is fixedly connected with the right side of the moving rod 11. The multi-stage electric telescopic rod 12 is used to drive the moving rod 11 to move laterally;

[0027] A control and alarm mechanism is fixedly connected to the left side of the first support plate 6. The control and alarm mechanism includes a controller 13 and an audible and visual alarm 14 fixedly connected to the left side of the first support plate 6. The multi-stage electric telescopic rod 12, two pressure sensors 17, and the audible and visual alarm 14 are all electrically connected to the controller 13. The principle that the controller 13 receives the signals of the pressure sensors 17 to control the multi-stage electric telescopic rod 12 and the audible and visual alarm 14 is prior art and will not be elaborated here. Through a series of structural settings, the utility model can detect the inner and outer sides of the municipal pipeline 101 after clamping and limiting at the same time, improve the detection efficiency, and can alarm and remind personnel in time when detecting unevenness, which is convenient for personnel to make marks in time and further improve the detection accuracy.

[0028] Working principle: When in use, the municipal pipeline 101 to be detected is placed above the two L-shaped support plates 3, and the municipal pipeline 101 is sleeved on the lower cross bar 10. The top and the inner wall of the top of the municipal pipeline 101 are respectively in movable contact with the corresponding rollers, and the compression spring 18 is in a compressed state. The pressure sensor 17 detects the pressure value of the corresponding pressure sensor 18 and transmits the pressure to the external mobile phone APP. At this time, the pressure value displayed on the mobile phone APP is the initial pressure value, and this pressure value is set as the threshold value. Then, the driving motor 4 is started in the forward direction. The output shaft of the driving motor 4 drives the two screws 2 to rotate. Under the action of the threaded holes formed in the moving blocks 1, since the thread directions of the two screws 2 are opposite, the two screws 2 rotate to drive the two moving blocks 1 to move towards each other. The two moving blocks 1 drive the two L-shaped support plates 3 to move towards each other. The left L-shaped support plate 3 drives the first clamping block 5 to move to the right to be in movable contact with the left side of the municipal pipeline 101. At the same time, the right L-shaped support plate 3 drives the circular ring 7 to move to the left through the corresponding support rod 9, the brake motor 8, and the mounting plate. The circular ring 7 drives the anti-slip rubber ring to move to the left to be in close contact with the right side of the municipal pipeline 101. At this time, the municipal pipeline 101 is restricted by the cooperation of the first clamping block 5 and the circular ring 7.

[0029] Subsequently, the multi-stage electric telescopic rod 12 is started in the forward direction. The output shaft of the multi-stage electric telescopic rod 12 drives the moving rod 11 to move leftward. The moving rod 11 drives the two cross bars 10 to move leftward. The cross bars 10 drive the corresponding mounting pipes 15 to move leftward. The mounting pipes 15 drive the rollers to move through the corresponding extrusion rods 16. The two rollers roll on the top and the inner wall of the top of the municipal pipeline 101 respectively. If there are depressions or protrusions on the top or the inner wall of the top of the municipal pipeline 101, the protrusion surface presses against the corresponding roller, and the concave surface relaxes the pressing force on the roller, causing the extrusion rod 16 to move. The extrusion rod 16 compresses or releases the compression force on the corresponding compression spring 18. At the same time, the pressure sensor 17 detects the pressing force on the compression spring 18 and transmits the pressure value to the controller 13. When it is detected that the pressure is lower or higher than the threshold value, the controller 13 controls the corresponding sound and light alarm 14 to give a sound and light alarm to remind the personnel. At the same time, the controller 13 controls the multi-stage electric telescopic rod 12 to close. The change of the pressure value can be monitored through the mobile phone APP. At this time, the personnel can detect and mark the position corresponding to the roller, and then drive the multi-stage electric telescopic rod 12 to start again to continue the detection;

[0030] When the top and the inner wall of the top of the municipal pipeline 101 are detected and it is necessary to detect the other side, the brake motor 8 is started in the forward direction. The output shaft of the brake motor 8 drives the mounting plate to rotate. The mounting plate drives the municipal pipeline 101 to rotate through the friction of the circular ring 7 and the anti-slip rubber ring in sequence. When the other side of the municipal pipeline 101 faces upward, the brake motor 8 can be stopped, and then the detection can be continued. Moreover, by driving the two elastic detection mechanisms to move synchronously for detection, the inner and outer sides of the municipal pipeline 101 can be detected simultaneously, improving the detection efficiency. In addition, the method of giving an alarm to remind the personnel when unevenness occurs is convenient for the personnel to make marks in time, thereby further improving the detection accuracy.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A device for detecting the straightness of municipal pipelines, comprising a box-shaped base (100) arranged below the municipal pipeline (101), the top of the box-shaped base (100) being open, characterized in that, A threaded drive mechanism is installed between the inner walls on both sides of the box-shaped base (100). The top of the threaded drive mechanism is fixedly connected to two symmetrically arranged L-shaped support plates (3). The top of the left L-shaped support plate (3) is fixedly connected to a first clamping block (5). A rotary drive mechanism is fixedly installed at the top of the right L-shaped support plate (3). The right side of the first clamping block (5) and the left side of the rotary drive mechanism are respectively in movable contact with both sides of the municipal pipeline (101). Elastic detection mechanisms are in movable contact with both the top right side and the top inner wall of the municipal pipeline (101). The left sides of the two elastic detection mechanisms are fixedly connected to the same transverse drive mechanism. The left side of the transverse drive mechanism extends to the left side of the municipal pipeline (101). The left side of the box-shaped base (100) is fixedly connected to a first support plate (6). The transverse drive mechanism is fixedly connected to the top of the first support plate (6). The left side of the first support plate (6) is fixedly connected to a control and alarm mechanism. The control and alarm mechanism is electrically connected to the two elastic detection mechanisms and the transverse drive mechanism.

2. The flatness detection device for municipal pipelines according to claim 1, wherein The threaded drive mechanism includes two screw rods (2). The two screw rods (2) are respectively rotatably installed on the inner walls on both sides of the box-shaped base (100). The ends of the two screw rods (2) close to each other are welded together. The thread directions of the two screw rods (2) are opposite. A drive motor (4) is fixedly installed on the right side of the box-shaped base (100). The left end of the output shaft of the drive motor (4) is fixedly connected to the right end of the right screw rod (2). A moving block (1) is sleeved on the screw rod (2) in a threaded manner. The moving block (1) is slidably installed on the bottom inner wall of the box-shaped base (100). The top of the moving block (1) is fixedly connected to the bottom of the corresponding L-shaped support plate (3).

3. The municipal pipeline straightness detection device according to claim 2, wherein, The rotary drive mechanism includes a circular ring (7). An anti-slip rubber ring is adhesively fixed to the left side of the circular ring (7). The left side of the anti-slip rubber ring is in movable contact with the right side of the municipal pipeline (101). The right side of the circular ring (7) is fixedly connected to a mounting plate. A support rod (9) is fixedly connected to the top of the right L-shaped support plate (3). A brake motor (8) is embedded and fixed on the left side of the support rod (9). The left end of the output shaft of the brake motor (8) is fixedly connected to the right side of the mounting plate.

4. The municipal pipeline straightness detection device according to claim 3, characterized in that, The elastic detection mechanism includes a mounting tube (15). The ends of the two mounting tubes (15) facing each other up and down and away from each other are both provided with a sealing structure. An extrusion rod (16) is slidably sleeved in the mounting tube (15). Rollers are rotatably installed on the sides of the two extrusion rods (16) close to each other. The adjacent sides of the two rollers are respectively in rolling contact with the top and the top inner wall of the municipal pipeline (101). A pressure sensor (17) is fixedly connected to the inner wall of the mounting tube (15) away from its opening. A compression spring (18) in a compressed state is fixedly connected between the detection end of the pressure sensor (17) and the corresponding extrusion rod (16). A push rod is fixedly connected to the right side of the extrusion rod (16). The right end of the push rod extends to the right side of the corresponding mounting tube (15). The pressure sensor (17) is matched with an external mobile phone APP.

5. The straightness detection device for municipal pipelines according to claim 4, characterized in that, The horizontal driving mechanism includes two cross bars (10). The first clamping block (5) is slidably sleeved on the two cross bars (10). The right ends of the two cross bars (10) are respectively fixedly connected to the left sides of the corresponding mounting pipes (15). The left ends of the two cross bars (10) are fixedly connected to the same moving rod (11) located on the left side of the municipal pipeline (101). The top of the first support plate (6) is fixedly connected with a multi-stage electric telescopic rod (12). The left end of the output shaft of the multi-stage electric telescopic rod (12) is fixedly connected to the right side of the moving rod (11).

6. The flatness detection device for municipal pipelines according to claim 5, characterized in that, The control and alarm mechanism includes a controller (13) and an audible and visual alarm (14) fixedly connected to the left side of the first support plate (6). The multi-stage electric telescopic rod (12), two pressure sensors (17) and the audible and visual alarm (14) are all electrically connected to the controller (13).

7. The municipal pipeline straightness detection device according to claim 2, characterized in that, A T-shaped slide rail is fixedly connected to the bottom inner wall of the box-shaped base (100). T-shaped sliding grooves with openings on both sides are formed at the bottom of the moving block (1). Both of the two T-shaped sliding grooves are slidably connected to the T-shaped slide rail.

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