Building engineering heating and ventilation pipeline laying fixing device

Abstract

The utility model discloses a constructional engineering heating and ventilation pipeline laying fixing device which comprises a supporting seat, a movable plate is arranged above the supporting seat, a plurality of first arc-shaped clamping plates are arranged at the bottom of the movable plate and the top of the supporting seat, and every two first arc-shaped clamping plates which are opposite up and down are symmetrically arranged. The building engineering heating and ventilation pipeline is clamped and fixed through the two first arc-shaped clamping plates which are vertically opposite, and L-shaped supporting plates are fixedly connected to the two sides of the supporting base correspondingly. Through the arrangement of a series of structures, the first arc-shaped clamping plate on the upper portion can be driven to move downwards to conduct pressure-controlled pressing and fixing on a pipeline, the clamping device can be suitable for clamping and fixing constructional engineering heating and ventilation pipelines of different specifications, the application range is widened, the situation that the pipeline is damaged due to large pressing and fixing can be reduced, and the practicability is high. And meanwhile, the pipeline at the bent position can be clamped and fixed, and the use flexibility is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of HVAC pipeline laying and fixing equipment, in particular to a HVAC pipeline laying and fixing device for a construction project. Background Art

[0002] HVAC pipes are an important part of construction projects. HVAC pipes are widely used. When installing HVAC pipes, it is necessary to use fixing devices to position and reinforce the pipes. The device for installing HVAC pipes in the related art is to install a hanging frame on the building, install an installation frame on the hanging frame, place the HVAC pipes on the installation frame and then fix them. When the HVAC pipes are installed in a specific position or the lengths of the HVAC pipes are different, it is inconvenient to adjust the position of the installation frame, which affects the installation efficiency. Therefore, the application number: 202022633215.0 discloses a HVAC pipe laying device for construction projects. The fixing device comprises a mounting frame and a mounting frame for fixing the HVAC pipe, the mounting frame is connected to the mounting frame, the mounting frame comprises a card plate and a connecting plate, the connecting plate is connected to the mounting frame through the card plate, the card plate is slidably arranged on the mounting frame, a plurality of fixing holes are opened on the mounting frame, the plurality of fixing holes are arranged at intervals along the length direction of the mounting frame, a fixing rod is arranged on the card plate, the fixing rod is inserted into the fixing hole, the connecting plate and the card plate are hinged, a support plate is arranged at one end of the connecting plate away from the card plate, and a limiting mechanism for installing the HVAC pipe is arranged on the support plate; the device has the effect of improving installation efficiency;

[0003] The above patent discloses a construction engineering HVAC pipe laying and fixing device, which fixes the HVAC pipe on the support plate through a limiting mechanism, thereby achieving the fixation of the HVAC pipe. However, it still has some shortcomings during use: 1. The limiting mechanism is composed of two limiting rings, which can only fix HVAC pipes of the same specification, and its scope of application is relatively limited; 2. The fixing device of the above patent is not suitable for fixing the bending parts of the HVAC pipe, has low flexibility in use, and cannot meet the use requirements. Based on the above situation, we propose a construction engineering HVAC pipe laying and fixing device. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a construction engineering HVAC pipeline laying and fixing device.

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

[0006] The fixing device for laying HVAC pipes in a construction project comprises a support seat, a movable plate is provided above the support seat, and a plurality of first arc-shaped clamping plates are provided at the bottom of the movable plate and the top of the support seat, and two first arc-shaped clamping plates opposite to each other are symmetrically arranged, and the HVAC pipes of the construction project facing front and back are clamped and fixed by the two first arc-shaped clamping plates opposite to each other. Both sides of the support seat are fixedly connected with an L-shaped support plate, and a threaded driving mechanism is installed on the L-shaped support plate, and the sides of the two threaded driving mechanisms close to each other are respectively fixedly connected with the two sides of the movable plate, and the threaded driving mechanism is used to vertically drive the movable plate, and a fixing plate is provided above the movable plate, which is fixedly installed with the tops of the two L-shaped support plates at the same time, and a mounting groove is provided on the rear side of the fixing plate, and the tops of the two threaded driving mechanisms extend into the mounting groove and are fixedly connected with the same linkage mechanism, and the linkage mechanism can drive the two threaded driving mechanisms to rotate at the same time, and the top of the fixing plate is provided with a first groove with both the front side and the rear side being open, and the top of the linkage mechanism is fixedly connected with a T-shaped rotating rod extending into the first groove, and the T-shaped rotating rod is used to drive the linkage mechanism to rotate.

[0007] Preferably, the threaded drive mechanism includes a first screw, and a mounting hole is provided on one side of the two L-shaped support plates away from each other. The first screw is rotatably installed in the corresponding mounting hole, and a moving block is threadedly sleeved on the first screw and slidably sleeved in the corresponding mounting hole. The moving block is threadedly connected to the first screw so as to drive the corresponding moving block to move vertically while the first screw rotates. Connecting blocks are fixedly connected on both sides of the moving plate, and the connecting blocks are slidably sleeved on the corresponding L-shaped support plates and fixedly connected to the outer side of the moving block. The top end of the first screw extends into the mounting groove.

[0008] Preferably, the linkage mechanism includes two sprockets, the bottoms of the two sprockets are respectively fixedly connected to the tops of the corresponding first screws, the two sprockets are transmission-connected with the same chain, a T-shaped rotating rod is fixedly connected to the top of one of the sprockets, and the two sprockets and the chain cooperate to drive the two first screws to rotate synchronously.

[0009] Preferably, a second arc-shaped clamping plate is further provided at the top of the support seat and the bottom of the movable plate, and the two second arc-shaped clamping plates are symmetrically arranged, and the second arc-shaped clamping plates are used to clamp and fix the pipes facing left and right at the bend.

[0010] Preferably, a plurality of first grooves are provided on the top of the support seat and the bottom of the movable plate, a second screw is rotatably installed between the inner walls on both sides of the first groove, a rectangular block is threadedly sleeved on the second screw and slidably installed in the corresponding first groove, the plurality of rectangular blocks are respectively connected to the corresponding first arc-shaped clamping plates and the second arc-shaped clamping plates, and one ends of the plurality of second screws extend to the outside of the support seat and the movable plate, respectively, and are fixedly connected with knobs.

[0011] Preferably, it also includes multiple pressure sensors, which are installed at the bottom of the corresponding rectangular block above. The tops of the first arc-shaped clamping plate and the second arc-shaped clamping plate are respectively fixedly connected to the corresponding bottoms of the pressure sensors, and the pressure sensors are used to detect the extrusion force during pressing.

[0012] Preferably, it also includes a controller and an audible and visual alarm. The controller is electrically connected to the pressure sensor and the audible and visual alarm. The audible and visual alarm is used to warn people through audible and visual alarms. The controller receives the pressure value transmitted by the pressure sensor to control the audible and visual alarm.

[0013] Preferably, the side openings of the plurality of first arc-shaped clamps are arranged front to back, and the side openings of the two second arc-shaped clamps are arranged left to right. The first arc-shaped clamps are used to clamp the pipes in the front to back direction, and the second arc-shaped clamps are used to clamp the pipes in the left to right direction.

[0014] Compared with the existing technology, the beneficial effects of the utility model are:

[0015] 1. Through the cooperation of the threaded drive mechanism, linkage mechanism, pressure sensor, controller and sound and light alarm, the first arc-shaped clamping plate above can be driven to move downward to control the pressure and compact the pipeline, which can effectively reduce the risk of damage to the pipeline caused by large compaction. The method of driving the first arc-shaped clamping plate downward to clamp and fix can be applied to clamp and fix HVAC pipelines of construction projects of different specifications, thereby increasing the scope of application;

[0016] 2. The second arc-shaped clamping plate can be used to clamp and fix the pipe at the bend, thereby improving the flexibility of use;

[0017] 3. Through the cooperation of the second screw and the rectangular block, the positions of the first arc-shaped clamping plate and the second arc-shaped clamping plate can be adjusted according to the position of the pipeline, so as to facilitate the fixing operation of personnel;

[0018] The utility model, through the arrangement of a series of structures, can drive the first arc-shaped clamping plate above to move downward to control the pressure and fix the pipeline, so that it can be suitable for clamping and fixing HVAC pipelines of construction projects with different specifications, thereby improving the scope of application and reducing the situation where damage to the pipeline is caused by excessive pressure and fixation. At the same time, the pipeline at the bend can be clamped and fixed, thereby improving the flexibility of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional structural diagram of a construction engineering HVAC pipeline laying and fixing device proposed by the utility model;

[0020] Figure 2 This is a schematic diagram of the main cross-sectional structure of a construction engineering HVAC pipeline laying and fixing device proposed by the utility model;

[0021] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of part A.

[0022] In the figure: 100, support seat; 1, first arc-shaped clamping plate; 2, first groove; 3, movable plate; 4, rectangular block; 5, second screw; 6, pressure sensor; 7, controller; 8, sound and light alarm; 9, T-shaped rotating rod; 10, L-shaped support plate; 11, fixed plate; 12, mounting hole; 13, first screw; 14, connecting block; 15, movable block; 16, mounting groove; 17, sprocket; 18, chain; 19, second arc-shaped clamping plate. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Embodiment 1

[0025] Reference Figure 1-3, a construction engineering HVAC pipeline laying and fixing device comprises a support seat 100, a movable plate 3 is arranged above the support seat 100, a plurality of first arc-shaped clamping plates 1 are arranged at the bottom of the movable plate 3 and the top of the support seat 100, two first arc-shaped clamping plates 1 opposite to each other are symmetrically arranged, and the front-to-back facing construction engineering HVAC pipelines are clamped and fixed by the two first arc-shaped clamping plates 1 opposite to each other, the side openings of the plurality of first arc-shaped clamping plates 1 are arranged front and back, and the sides of the two first arc-shaped clamping plates 1 opposite to each other are bonded and fixed with first anti-skid pads, and the setting of the first anti-skid pads can effectively reduce the slipping during the clamping and fixing process, both sides of the support seat 100 are fixedly connected with L-shaped support plates 10, and a threaded driving mechanism is installed on the L-shaped support plate 10, and the sides of the two threaded driving mechanisms close to each other are fixedly connected with the two sides of the movable plate 3 respectively, and the threaded driving mechanism comprises a first screw 13, and the sides of the two L-shaped support plates 10 away from each other are provided with mounting holes 12, and the first screw 13 The first bearing is fixedly connected to the inner wall of the bottom of the mounting hole 12, and the inner side of the inner ring of the first bearing is fixedly connected to the outer side of the first screw rod 13. The first bearing plays the role of providing the first screw rod 13 with a rotatable mounting. The first screw rod 13 is threadedly sleeved with a moving block 15 which is slidably sleeved in the corresponding mounting hole 12. The top of the moving block 15 is provided with a first threaded hole which is threadedly connected to the corresponding first screw rod 13. The moving block 15 and the first screw rod 13 are threadedly connected through the first threaded hole, and the moving block 15 can be driven to move vertically while the first screw rod 13 rotates. Both sides of the moving plate 3 are fixedly connected with connecting blocks 14, which are slidably sleeved on the corresponding L-shaped supporting plate 10 and fixedly connected to the outer side of the moving block 15. The top of the connecting block 14 is provided with a rectangular through-hole, and the inner wall of the rectangular through-hole is in sliding contact with the outer side of the corresponding L-shaped supporting plate 10. The two sides of the rectangular through-hole are respectively fixedly connected to the inner walls on both sides of the corresponding moving block 15.

[0026] A fixing plate 11 is provided above the movable plate 3 and is fixedly mounted on the tops of the two L-shaped support plates 10 at the same time. A mounting groove 16 is provided on the rear side of the fixing plate 11. The top ends of the two first screw rods 13 extend into the mounting groove 16 and are fixedly connected with the same linkage mechanism. The linkage mechanism includes two sprocket wheels 17. The bottom ends of the two sprocket wheels 17 are fixedly connected with the top ends of the corresponding first screw rods 13 respectively. A first circular hole is provided on the bottom inner wall of the mounting groove 16. A second bearing is fixedly sleeved in the first circular hole. The inner side of the inner ring of the second bearing is fixedly connected with the outer side of the corresponding first screw rod 13. The second bearing serves to provide a rotatable mounting for the corresponding first screw rod 13. A second circular hole is provided on the top inner wall of the mounting hole 12. The first screw rod 13 is located in the corresponding second circular hole and does not contact the inner wall of the second circular hole. The second circular hole is used for the corresponding first screw rod 13 to pass through. The two sprocket wheels 17 are transmission-connected with the same chain 18. The two sprocket wheels 17 cooperate with the chain 18 to drive the two first screw rods 13 to rotate synchronously.

[0027] The top of the fixed plate 11 is provided with a first groove with both the front and rear sides being open, a T-shaped rotating rod 9 is fixedly connected to the top of one of the sprocket wheels 17, and a reserved hole is provided on the bottom inner wall of the first groove for the T-shaped rotating rod 9 to vertically pass through;

[0028] In this embodiment, the method of clamping and fixing the pipe by driving the first arc-shaped clamping plate 1 to move downward can be applied to clamping and fixing pipes of different specifications.

[0029] Embodiment 2

[0030] Reference Figure 1-2 , which is different from the first embodiment in that: a second arc-shaped clamping plate 19 is further provided at the top of the support seat 100 and the bottom of the movable plate 3, the two second arc-shaped clamping plates 19 are symmetrically arranged, the side openings of the two second arc-shaped clamping plates 19 are arranged on the left and right sides, and the two second arc-shaped clamping plates 19 are bonded and fixed with a second anti-slip pad on one side close to each other. The setting of the second anti-slip pad can effectively reduce the slipping during the clamping and fixing process, and the second arc-shaped clamping plate 19 is used to clamp the pipes in the left and right directions of the bend;

[0031] A plurality of first grooves 2 are provided on the top of the support seat 100 and the bottom of the movable plate 3. The first groove 2 on the right side has a different orientation from the first groove 2 on the left side. A second screw 5 is rotatably installed between the inner walls on both sides of the first groove 2. The second screw 5 on the right side has a different orientation from the second screw 5 on the left side. A third bearing is fixedly connected to the inner wall on one side of the first groove 2. A first through hole is provided on the inner wall on the other side of the first groove 2. Two fourth bearings are fixedly sleeved in the first through hole. The inner sides of the inner rings of the third bearings and the inner sides of the inner rings of the fourth bearings are fixedly connected to the outer sides of the corresponding second screws 5. The third bearing and the fourth bearing serve to provide a rotational installation for the corresponding second screw 5. The threaded sleeve on the second screw 5 is provided with a sliding sleeve installed on the corresponding The rectangular block 4 in the first groove 2, wherein a second threaded hole threadedly connected to the corresponding second screw 5 is opened on one side of the rectangular block 4, and the second screw 5 is threadedly connected to the rectangular block 4 through the corresponding second threaded hole, so that the corresponding rectangular block 4 can be driven to move while the second screw 5 rotates, and a T-shaped slide rail is fixedly connected to the inner wall of the first groove 2 on the side away from its opening, and a T-shaped slide groove is opened on the outer side of the rectangular block 4, and the T-shaped slide rail is slidably connected to the corresponding T-shaped slide groove, and the T-shaped slide rail has a guiding effect on the rectangular block 4, and multiple rectangular blocks 4 are respectively connected to the corresponding first arc clamping plate 1 and second arc clamping plate 19, and one end of multiple second screws 5 respectively extends to the outside of the support seat 100 and the movable plate 3 and is fixedly connected with a knob;

[0032] It also includes a plurality of pressure sensors 6, which are installed at the bottom of the corresponding rectangular block 4 above, and the tops of the first arc-shaped clamping plate 1 and the second arc-shaped clamping plate 19 are respectively fixedly connected to the bottoms of the corresponding pressure sensors 6, and the pressure sensors 6 are used to detect the extrusion force during pressing;

[0033] It also includes a controller 7 and an audible and visual alarm 8, which can be installed on the mobile plate 3, the controller 7 is electrically connected to the pressure sensor 6 and the audible and visual alarm 8, the audible and visual alarm 8 is used to audibly and visually alarm and remind personnel, the controller 7 receives the pressure value transmitted by the pressure sensor 6 to control the audible and visual alarm 8, and a battery is also installed on the mobile plate 3, the battery is electrically connected to the controller 7, the audible and visual alarm 8 and the pressure sensor 6, and the battery is used to power the controller 7, the audible and visual alarm 8 and the pressure sensor 6;

[0034] In this embodiment, the second arc-shaped clamping plate 19 is provided to clamp and fix the pipes in the left and right directions of the bend, thereby improving the flexibility of use. In addition, the positions of the first arc-shaped clamping plate 1 and the second arc-shaped clamping plate 19 can be adjusted according to the position of the pipe, so as to facilitate the fixing operation by personnel. The upper first arc-shaped clamping plate 1 can also be driven to move downward to control the pressure and fix the pipe.

[0035] Working principle: first, fix the fixing plate 11 at the position where the HVAC pipes of the construction project need to be installed by external bolts. When only the HVAC pipes of the construction project in the same direction are fixed, the HVAC pipes of the construction project can be placed in the multiple first arc-shaped clamping plates 1 below, and then the T-shaped rotating rod 9 is rotated forward, and the T-shaped rotating rod 9 drives one of the sprockets 17 to rotate, and one of the sprockets 17 drives another sprocket 17 to rotate through the chain 18, and the sprocket 17 drives the corresponding first screw 13 to rotate. Under the action of the thread, the rotation of the two first screws 13 drives the two moving blocks 15 to move downward at the same time, and the moving blocks 15 drive the corresponding connecting blocks 14 to move downward, and the two connecting blocks 14 drive the moving plate 3 to move downward at the same time, and the moving plate 3 drives the multiple first arc-shaped clamping plates 1 above to move downward through the corresponding second screws 5, rectangular blocks 4 and pressure sensors 6 in turn, and the upper first When the arc clamping plate 1 moves downward to contact the top of the HVAC pipe of the construction project, the first arc clamping plate 1 above is restricted from continuing to move. At this time, the rectangular block 4 squeezes the pressure sensor 6 downward, and the pressure sensor 6 monitors the squeezing force and transmits the detected pressure value to the controller 7. When the squeezing force reaches the preset value, it proves that the HVAC pipe of the construction project is stably clamped. The controller 7 controls the sound and light alarm 8 to emit a sound and light alarm to remind the personnel, and the personnel can stop rotating the T-shaped rotating rod 9, thereby realizing the pressure control and compression of the HVAC pipe of the construction project. By means of pressure control and compression, the deformation of the HVAC pipe of the construction project due to the large clamping force can be effectively reduced. In addition, the method of driving the first arc clamping plate 1 above to move downward to clamp and fix the HVAC pipe of the construction project can be applicable to the clamping and fixing of HVAC pipes of construction projects of different specifications, thereby improving the scope of application.

[0036] When fixing the pipe at the bend, the front-to-back pipe can be placed in the multiple first arc-shaped clamps 1 at the lower left side, and the left-to-right pipe can be placed in the second arc-shaped clamp 19 at the lower side. The upper first arc-shaped clamp 1 and the upper second arc-shaped clamp 19 can be driven downward in the same way as above to clamp and fix the bend of the pipe, thereby achieving the effect of fixing the bend of the pipe. The device can be used for both the single pipe and the pipe at the bend at the same time, thereby improving the flexibility of use.

[0037] When the position of the first arc clamp plate 1 and the position of the second arc clamp plate 19 deviate from the position of the pipeline, the position of the first arc clamp plate 1 and the position of the second arc clamp plate 19 can be adjusted. During adjustment, the corresponding second screw rod 5 is driven to rotate by rotating the knob in the forward direction. Under the action of the thread, the second screw rod 5 drives the corresponding rectangular block 4 to move while rotating. The multiple rectangular blocks 4 below respectively drive the corresponding first arc clamp plate 1 and the second arc clamp plate 19 to move. The multiple rectangular blocks 4 above drive the first arc clamp plate 1 and the second arc clamp plate 19 to move through the corresponding pressure sensors 6. When they are moved to be aligned with the pipeline, the knob can be stopped from being turned. The position of the first arc clamp plate 1 and the second arc clamp plate 19 can be adjusted according to the position of the pipeline, thereby improving the flexibility of use and facilitating installation and operation.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A construction engineering HVAC pipeline laying and fixing device, comprising a support seat (100), characterized in that: A movable plate (3) is provided above the support seat (100), a plurality of first arc-shaped clamping plates (1) are provided at the bottom of the movable plate (3) and the top of the support seat (100), L-shaped support plates (10) are fixedly connected to both sides of the support seat (100), a threaded driving mechanism is installed on the L-shaped support plate (10), and the sides of the two threaded driving mechanisms close to each other are respectively fixedly connected to the two sides of the movable plate (3), a fixed plate (11) is provided above the movable plate (3) and is fixedly installed with the tops of the two L-shaped support plates (10), a mounting groove (16) is provided on the rear side of the fixed plate (11), the top ends of the two threaded driving mechanisms extend into the mounting groove (16) and are fixedly connected to the same linkage mechanism, a first groove with both the front and rear sides being opened is provided on the top of the fixed plate (11), and a T-shaped rotating rod (9) extending into the first groove is fixedly connected to the top of the linkage mechanism.

2. A construction engineering HVAC pipeline laying and fixing device according to claim 1, characterized in that: The threaded drive mechanism comprises a first screw rod (13), a mounting hole (12) is provided on one side of the two L-shaped support plates (10) away from each other, the first screw rod (13) is rotatably mounted in the corresponding mounting hole (12), a moving block (15) is threadedly sleeved on the first screw rod (13) and is slidably sleeved in the corresponding mounting hole (12), both sides of the moving plate (3) are fixedly connected with a connecting block (14), the connecting block (14) is slidably sleeved on the corresponding L-shaped support plate (10) and is fixedly connected to the outer side of the moving block (15), and the top end of the first screw rod (13) extends into the mounting groove (16).

3. A construction engineering HVAC pipeline laying and fixing device according to claim 2, characterized in that: The linkage mechanism comprises two sprocket wheels (17), the bottoms of the two sprocket wheels (17) are respectively fixedly connected to the tops of the corresponding first screw rods (13), the two sprocket wheels (17) are transmission-connected with a same chain (18), and the T-shaped rotating rod (9) is fixedly connected to the top of one of the sprocket wheels (17).

4. A construction engineering HVAC pipeline laying and fixing device according to claim 1, characterized in that: A second arc-shaped clamping plate (19) is also provided on the top of the support seat (100) and the bottom of the movable plate (3).

5. A construction engineering HVAC pipeline laying and fixing device according to claim 4, characterized in that: The top of the support seat (100) and the bottom of the movable plate (3) are both provided with a plurality of first grooves (2), a second screw rod (5) is rotatably mounted between the inner walls on both sides of the first groove (2), a rectangular block (4) is threadedly sleeved on the second screw rod (5) and slidably mounted in the corresponding first groove (2), the plurality of rectangular blocks (4) are respectively connected to the corresponding first arc-shaped clamping plate (1) and the second arc-shaped clamping plate (19), one end of the plurality of second screw rods (5) respectively extends to the outside of the support seat (100) and the movable plate (3) and is fixedly connected to a knob.

6. A construction engineering HVAC pipeline laying and fixing device according to claim 5, characterized in that: It also includes a plurality of pressure sensors (6), wherein the pressure sensors (6) are mounted on the bottom of the corresponding rectangular blocks (4) above, and the tops of the first arc-shaped clamping plate (1) and the second arc-shaped clamping plate (19) are respectively fixedly connected to the bottoms of the corresponding pressure sensors (6).

7. A construction engineering HVAC pipeline laying and fixing device according to claim 6, characterized in that: It also includes a controller (7) and an audible and visual alarm (8), and the controller (7) is electrically connected to the pressure sensor (6) and the audible and visual alarm (8).

8. A construction engineering HVAC pipeline laying and fixing device according to claim 4, characterized in that: The side openings of the plurality of first arc-shaped clamping plates (1) are all arranged front and back, and the side openings of the two second arc-shaped clamping plates (19) are all arranged left and right.

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