Integrated heat supply metering device installed outdoors
By using a combination of clamp mechanism, mounting cylinder, sleeve and elastic mechanism in the heating metering device, the rapid installation and disassembly of the heating meter body is achieved, which solves the cumbersome disassembly process in the prior art and improves the operation convenience and efficiency.
Patent Information
- Application Number
- CN202421205474.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2023-09-11
- Filing Date
- 2024-05-29
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-29
AI Technical Summary
When the existing heating metering device is regularly repaired or replaced, the disassembly process is complicated, especially the electromagnetic meter needs tools to unscrew the fixing bolts, which leads to inconvenience.
An integrated heating metering device for outdoor installation is designed, using a combination of multiple clamp mechanisms, mounting cylinders, sleeves and elastic mechanisms. Through the removable connection between the sleeves and the mounting cylinders, the heating meter body is achieved quickly. Installation and removal.
This device makes the installation and disassembly of the heating meter body simpler and more efficient, without screwing, making it easier to repair or replace regularly, and makes it easier to operate.
Smart Images

Figure CN222505648U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat supply metering equipment, and more specifically, to an outdoor installed integrated heat supply metering device. Background Art
[0002] The heat supply meter is used to detect the heat supply in the pipeline for real-time measurement. The heat supply meter includes a metering instrument and a sensor for measuring the flow rate and temperature of the pipeline. The instrument host can adopt a heat-resistant, moisture-proof and corrosion-resistant plastic shell. The instrument can be fixed on the adjacent wall or pipeline by wall-mounting or clamping; the sensor includes an electromagnetic flow sensor and a paired temperature sensor (PT100), which can be installed by insertion, external clamp or pipe segment sensor. The sensor is connected to other electronic components integrated in the metering instrument through wires. The sensor feeds back the detection results to the heat calculation unit of the metering instrument, calculates the heat consumption and displays it on the display screen. For pipelines without heat consumption, the heat consumption can be calculated by the heat calculation unit. If there is a wall, the metering instrument is usually installed on the pipeline, and the installation equipment is used to connect the metering instrument to the pipeline. For example, the utility model patent with authorization announcement number CN216050377U discloses a heat metering device, which includes an electromagnetic meter and a mounting mechanism. The mounting mechanism includes an elastic contraction structure, a connecting assembly and a locker. The electromagnetic meter is installed on the mounting sliding sleeve of the elastic contraction structure through a second connecting ear plate and a fixing bolt. The electromagnetic meter is troublesome to disassemble. It is necessary to use a tool to unscrew the fixing bolt and contact and fix the second connecting ear plate with the mounting sliding sleeve before the electromagnetic meter can be removed. This is inconvenient for regular maintenance or replacement of the meter. Utility Model Content
[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described below.
[0004] Another object of the present invention is to provide an outdoor integrated heat metering device to solve the technical problems in the above-mentioned background technology.
[0005] In order to achieve these purposes and other advantages according to the utility model, an outdoor integrated heating metering device is provided, which includes:
[0006] A plurality of clamp mechanisms are arranged at intervals along the length direction of the pipeline, and each clamp mechanism is arranged to surround and clamp the outside of the pipeline;
[0007] An installation cylinder is arranged along the length direction of the pipeline, and one side of the installation cylinder is connected to each clamp mechanism;
[0008] A plurality of sleeves are arranged at intervals along the axial direction of the installation tube and are coaxially sleeved on the outside of the installation tube. A notch is provided along the axial direction on a side of each sleeve close to the clamp mechanism for the connection between the clamp mechanism and the installation tube to pass through;
[0009] A plurality of pairs of elastic mechanisms, each sleeve is provided with a pair of elastic mechanisms, each pair of elastic mechanisms is respectively located at the two ends of the corresponding sleeve, each elastic mechanism comprises a plurality of elastic members spaced apart in the circumferential direction, each elastic member is connected to the circumferential side surface of the mounting tube in a radial sliding manner along the mounting tube; one end of each elastic member is located inside the mounting tube, and the other end passes through the mounting tube and extends to the outside of the mounting tube, and the two ends of the sleeve in the axial direction are respectively abutted against the other ends of the corresponding plurality of elastic members;
[0010] The heating meter body is connected to each sleeve via a second connecting block.
[0011] Preferably, the outdoor installed integrated heat metering device, the heat meter body includes a metering instrument box, a flow sensor, and a temperature sensor, the metering instrument box is connected to each sleeve through a second connecting block, a heat calculation unit is encapsulated in the metering instrument box, the flow sensor is an external clamp-on ultrasonic flow meter, the flow sensor is used to detect the flow rate of the fluid in the pipeline, and the temperature sensor is used to detect the inlet and outlet heat of the pipeline fluid; the flow sensor and the temperature sensor are connected to the heat calculation unit through wires.
[0012] Preferably, in the outdoor installed integrated heat metering device, each clamp mechanism includes a first connecting block and two C-shaped clamps hinged to both sides of one end of the first connecting block, one side of the mounting tube is connected to the other end of each first connecting block; the two free ends of the two C-shaped clamps are detachably connected, and the two C-shaped clamps can form a hollow cylindrical structure that embraces the pipeline.
[0013] Preferably, in the outdoor integrated heat metering device, the mounting tube is provided with a plurality of through holes, each through hole penetrates in the radial direction, and each elastic member is provided with a corresponding through hole;
[0014] Each elastic member comprises:
[0015] A movable rod, one end of which is located in the installation tube, and the other end of which passes through the corresponding through hole and extends to the outside of the installation tube;
[0016] The movable rod is slidably connected to the inner wall of the through hole along the radial direction of the mounting cylinder;
[0017] A spring is sleeved on the movable rod, one end of the spring is connected to one end of the movable rod, and the other end of the spring extends along the radial direction of the mounting tube and is connected to the inner wall of the through hole;
[0018] A ball is rotatably embedded in the other end of the movable rod.
[0019] Preferably, in the outdoor integrated heat metering device, one end of each movable rod is a wedge-shaped structure, and one end of the multiple movable rods of each elastic mechanism forms a notch of a conical structure;
[0020] The device also includes a positioning rod, which is coaxially arranged in the installation tube, and one end of the positioning rod is a cone structure adapted to the notch.
[0021] Preferably, in the outdoor integrated heat metering device, the other end of the positioning rod is provided with a cover body covering one end of the mounting tube, and the cover body is provided with an annular clamping block; and an annular clamping groove adapted to the clamping block is provided on the circumferential end surface of one end of the mounting tube.
[0022] Preferably, the cover of the outdoor integrated heat metering device is provided with a handle.
[0023] Preferably, in the outdoor integrated heat metering device, one C-shaped clamp is provided with a plurality of teeth along the circumferential direction, and the other C-shaped clamp is provided with an elastic sheet, and the elastic sheet is provided with a protrusion that can be clamped on the teeth.
[0024] Preferably, in the outdoor-installed integrated heat metering device, an air bag is provided on the concave surface of each C-shaped clamp.
[0025] The utility model includes at least the following beneficial effects: the heat meter body and the installation device of the utility model are sleeved by a sleeve, and a detachable connection is achieved by cooperating with the clamping of an elastic mechanism, which facilitates the installation and disassembly of the heat meter body. The heat meter body can be regularly disassembled for maintenance or replacement without removing the installation device, and the operation is simpler and more efficient.
[0026] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural schematic diagram of an outdoor-installed integrated heat metering device described in a technical solution of the utility model;
[0028] Figure 2 for Figure 1 Cross-sectional view of AA in the middle;
[0029] Figure 3 This is a schematic diagram of the structure of installing the cylinder and the positioning rod in another technical solution of the utility model;
[0030] Figure 4This is a schematic structural diagram of a meter box and a mounting tube in another technical solution of the utility model.
[0031] Explanation of the reference numerals: 1-pipe; 21-C-shaped clamp; 211-one of the C-shaped clamps; 212-the other C-shaped clamp; 213-grip; 214-elastic sheet; 215-bump; 22-first connecting block; 3-mounting cylinder; 31-slot; 4-sleeve; 41-second connecting block; 51-movable rod; 52-spring; 53-ball; 6-metering instrument box; 7-positioning rod; 71-cover; 72-block; 73-handle. DETAILED DESCRIPTION
[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.
[0033] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.
[0034] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified.
[0035] In the description of the present invention, terms such as "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0036] like Figures 1 to 4 As shown, the utility model provides an outdoor integrated heat metering device, which includes:
[0037] A plurality of clamp mechanisms are arranged at intervals along the length direction of the pipeline, and each clamp mechanism is clamped around the outside of the pipeline 1;
[0038] A mounting tube 3 is arranged along the length direction of the pipeline 1, and one side of the mounting tube 3 is connected to each clamp mechanism;
[0039] A plurality of sleeves 4 are arranged at intervals along the axial direction of the installation tube 3 and are coaxially sleeved on the outside of the installation tube 3. A notch is provided along the axial direction on a side of each sleeve 4 close to the clamp mechanism for the connection between the clamp mechanism and the installation tube 3 to pass through;
[0040] Multiple pairs of elastic mechanisms, each sleeve 4 is provided with a pair of elastic mechanisms, each pair of elastic mechanisms are respectively located at the two ends of the corresponding sleeve 4, each elastic mechanism comprises a plurality of elastic members spaced apart in the circumferential direction, each elastic member is connected to the circumferential side surface of the mounting tube 3 in a radial sliding manner along the mounting tube 3; one end of each elastic member is located inside the mounting tube 3, and the other end passes through the mounting tube 3 and extends to the outside of the mounting tube 3, and the two ends of the sleeve 4 along the axial direction are respectively abutted against the other ends of the corresponding plurality of elastic members;
[0041] The heat supply meter body is connected to each sleeve 4 via a second connecting block 41 .
[0042] In the above technical scheme, the utility model provides an integrated heat metering device installed outdoors, which includes a heat meter body (heat meter), a flow sensor and a paired temperature sensor, the paired temperature sensor measures the temperature of the fluid in and out, and the flow sensor measures the volume of the fluid passing through the pipeline, and these two data are collected and sent to integral calculation, and the heat used is calculated and displayed; the sensor is connected to the heat meter body through a wire, and the heat meter body is fixed on the pipeline through an installation device. The sensor can be completed according to the existing technology, taking the external clamp-type ultrasonic heat meter as an example: the emitting surface of the sensor is aligned with the outer wall of the pipeline (the rust on the outer wall of the pipeline is polished off in advance), a coupling agent is applied to the emitting surface of the sensor, and then the emitting surface of the sensor is attached to the outer wall of the pipeline and fixed by an annular clamp;
[0043] The installation device includes a plurality of clamp mechanisms connected to the pipeline embracing clamps, an internally hollow installation tube connected to the plurality of clamp mechanisms, a plurality of pairs of elastic mechanisms arranged on the installation tube, and a plurality of sleeves sleeved on the installation tube and connected to the heat meter body. The clamp mechanisms are connected to the pipeline by embracing clamps. The plurality of clamp mechanisms are arranged to improve the stability of the connection with the pipeline. The installation tube is connected to each clamp mechanism, and a plurality of pairs of elastic mechanisms are arranged on the installation tube at intervals along the axial direction thereof. A sleeve is sleeved between each elastic mechanism, and the other end of the elastic mechanism protrudes from the circumference of the installation tube. On the side, the sleeve is clamped and fixed. Since the elastic part is elastically slidably arranged along the radial direction of the mounting tube, an external force along the axial direction of the sleeve is applied to the sleeve, and the sleeve can move axially on the mounting tube. The mutual installation and disassembly of the sleeve and the mounting tube only requires applying an external force along the axial direction to the sleeve. The heat meter body is linked to the sleeve, and the heat meter body is connected to the pipeline through the sleeve and the mounting tube in cooperation with the elastic mechanism. The heat meter body can be installed on the pipeline or removed from the pipeline without tightening cumbersome connectors such as nuts and screws, thereby realizing quick installation and disassembly of the heat meter body.
[0044] The heat supply meter body of the utility model can select a metering device that can be used to detect the heat supply in the common sense, such as an inserted ultrasonic calorimeter, which connects the heat supply meter body (host) to the pipeline through an installation device composed of multiple clamp mechanisms, installation tubes and multiple pairs of elastic mechanisms; the heat supply meter body and the installation device are sleeved by a sleeve, and a detachable connection is achieved with the clamping of the elastic mechanism, which is convenient for the installation and disassembly of the heat supply meter body. The heat supply meter body can be regularly disassembled for maintenance or replacement without removing the installation device, and the operation is simpler and more efficient.
[0045] In another technical solution, the outdoor installed integrated heat metering device, the heat meter body includes a metering instrument box 6, a flow sensor, and a temperature sensor. The metering instrument box is connected to each sleeve through a second connecting block. A heat calculation unit is encapsulated in the metering instrument box. The flow sensor is an external clamp-on ultrasonic flow meter. The flow sensor is used to detect the flow rate of the fluid in the pipeline. The temperature sensor is used to detect the heat of the inlet and return of the pipeline fluid; the flow sensor and the temperature sensor are connected to the heat calculation unit through wires.
[0046] The heat calculation unit adopts a single-chip microcomputer with large memory capacity, and the equipment has high reliability. A display screen is also provided on the meter box with reference to the existing technical means. The utility model preferably uses an external clamp type ultrasonic flow sensor, and the emitting surface of the sensor is aligned with the outer wall of the pipeline (the rust on the outer wall of the pipeline is polished off in advance), and a coupling agent is applied on the emitting surface of the sensor, and then the emitting surface of the sensor is attached to the outer wall of the pipeline, and fixed by a ring clamp; the flow measurement principle of the ultrasonic flow sensor is to load specific flow rate information, detect the flow rate through the received ultrasonic wave, and convert it into a fluid flow rate. The external clamp type ultrasonic flow sensor has the advantages of not needing to destroy the pipeline and being easy to install. The paired temperature sensor is installed and connected by the existing technical means. The red label is the inlet temperature sensor inserted into the pipeline at the inlet end (water inlet), and the blue label is the return water end pipeline. The paired temperature sensor preferably adopts a platinum resistor Pt100, and its pairing error is ≤0.1°C; the flow sensor measures the fluid (generally water) flow signal, and combined with the supply and return water temperature signal (temperature difference) of the paired temperature sensor, the flow signal and the temperature signal are transmitted to the heat calculation unit, and the heat absorbed or released can be calculated, accumulated, stored and displayed.
[0047] In another technical solution, the outdoor integrated heat metering device, each clamp mechanism includes a first connecting block 22 and two C-shaped clamps hinged to both sides of one end of the first connecting block 22, one side of the mounting tube 3 is connected to the other end of each first connecting block 33; the two free ends of the two C-shaped clamps are detachably connected, and the two C-shaped clamps can form a hollow cylindrical structure that embraces the pipeline 1.
[0048] The clamp mechanism includes two C-shaped clamps and a first connecting block connecting the two C-shaped clamps. The two C-shaped clamps are connected to the mounting tube through the first connecting block, and the C-shaped clamps are fixedly connected to the pipeline through an embrace, thereby fixing the mounting tube to the pipeline. The two free ends of the two C-shaped clamps are detachably connected, which facilitates the removal of the clamp mechanism from the pipeline, thereby realizing the detachability of the metering device.
[0049] In another technical solution, in the outdoor integrated heat metering device, the mounting tube 3 is provided with a plurality of through holes, each through hole penetrates in the radial direction, and each elastic member is provided with a corresponding through hole;
[0050] Each elastic member comprises:
[0051] A movable rod 51, one end of which is located in the installation tube 3, and the other end of which passes through the corresponding through hole and extends to the outside of the installation tube 3; the movable rod 51 is slidably connected to the inner wall of the through hole along the radial direction of the installation tube 3;
[0052] A spring 52 is sleeved on the movable rod 51, one end of the spring 52 is connected to one end of the movable rod 51, and the other end of the spring 52 extends along the radial direction of the mounting tube 3 and is connected to the inner wall of the through hole;
[0053] The ball 53 is rotatably embedded in the other end of the movable rod 51 .
[0054] In the above technical scheme, each elastic member of the utility model is arranged on the through hole of the mounting tube, and specifically each elastic member includes a movable rod slidably connected to the inner wall of the through hole in the radial direction, a spring elastically connecting the movable rod to the mounting tube, and a ball arranged on the other end of the movable rod; the spring is arranged as follows: when the spring is in a naturally extended state, one end of the multiple movable rods is close to each other, and the other end is located in the through hole, and the ball protrudes from the circumferential side wall of the mounting tube. When the sleeve is sleeved on the outside of the mounting tube and moves axially, the external force pushing the sleeve generates an extrusion force on the ball, so that the ball retracts radially into the through hole and the spring is compressed. After the sleeve passes through the ball smoothly, the ball automatically resets under the action of the spring's own elastic force. After the sleeve is sleeved in place, the external force is released, and the multiple balls at both ends of the sleeve can clamp and position the sleeve to prevent the sleeve from shifting.
[0055] In another technical solution, in the outdoor integrated heat metering device, one end of each movable rod 51 is a wedge-shaped structure, and one end of the multiple movable rods 51 of each elastic mechanism forms a notch of a conical structure;
[0056] The device further comprises a positioning rod 7 which is coaxially arranged in the installation tube 3 , and one end of the positioning rod 7 is a conical structure adapted to the notch.
[0057] A notch in a conical structure is formed at one end of the multiple movable rods to facilitate the insertion of one end of the conical structure of the positioning rod. The positioning rod pushes the multiple movable rods away from each other, and then pushes the other end of the movable rod to the outside of the installation tube, which can better clamp and fix the sleeve.
[0058] In another technical solution, in the outdoor integrated heat metering device, the other end of the positioning rod 7 is provided with a cover body 71 for covering one end of the installation tube 3, and the cover body 71 is provided with an annular clamping block 72; the circumferential end surface of one end of the installation tube 3 is provided with an annular clamping groove 31 adapted to the clamping block 72. The clamping block on the cover body and the clamping groove on the installation tube realize the detachable connection between the cover body and the installation tube, which has a simple structure and is easy to operate.
[0059] In another technical solution, in the outdoor integrated heat metering device, the cover body 71 is provided with a handle 73. The handle is provided on the cover body to facilitate lifting the cover body.
[0060] In another technical solution, in the outdoor integrated heat metering device, a plurality of teeth 213 are provided on one C-shaped clamp 211 along the circumferential direction, and an elastic sheet 214 is provided on the other C-shaped clamp 212, and a projection 215 that can be clamped on the teeth 213 is provided on the elastic sheet 214. The two C-shaped clamps are clamped by the cooperation of the projection and the teeth, and the projection is removed from the teeth by manually pulling the elastic sheet outward, thereby releasing the clamping of the two C-shaped clamps and realizing the detachable connection of the two C-shaped clamps. The structural design of the two C-shaped clamps of the utility model is similar to the structure of belt buckles in common knowledge.
[0061] In another technical solution, in the outdoor integrated heat metering device, an air bag is provided on the concave surface of each C-shaped clamp. The air bag is provided on the concave surface of the C-shaped clamp so that the C-shaped clamp can fit tightly with the pipeline, improving the stability of the clamp mechanism and the pipeline installation. Furthermore, the air bag is made of elastic material, which can reduce the impact of vibration on the meter body.
[0062] The number of devices and processing scales described here are used to simplify the description of the utility model. Applications, modifications and variations of the utility model are obvious to those skilled in the art.
[0063] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.
Claims
1. An integrated heat metering device installed outdoors, characterized in that: include: A plurality of clamp mechanisms are arranged at intervals along the length direction of the pipeline, and each clamp mechanism is arranged to surround and clamp the outside of the pipeline; An installation cylinder is arranged along the length direction of the pipeline, and one side of the installation cylinder is connected to each clamp mechanism; A plurality of sleeves are arranged at intervals along the axial direction of the installation tube and are coaxially sleeved on the outside of the installation tube. A notch is provided along the axial direction on a side of each sleeve close to the clamp mechanism for the connection between the clamp mechanism and the installation tube to pass through; A plurality of pairs of elastic mechanisms, each sleeve is provided with a pair of elastic mechanisms, each pair of elastic mechanisms is respectively located at the two ends of the corresponding sleeve, each elastic mechanism comprises a plurality of elastic members spaced apart in the circumferential direction, each elastic member is connected to the circumferential side surface of the mounting tube in a radial sliding manner along the mounting tube; one end of each elastic member is located inside the mounting tube, and the other end passes through the mounting tube and extends to the outside of the mounting tube, and the two ends of the sleeve in the axial direction are respectively abutted against the other ends of the corresponding plurality of elastic members; The heating meter body is connected to each sleeve via a second connecting block.
2. The outdoor integrated heat metering device according to claim 1, characterized in that: The heat supply meter body includes a metering instrument box, a flow sensor, and a temperature sensor. The metering instrument box is connected to each sleeve through a second connecting block. A heat calculation unit is encapsulated in the metering instrument box. The flow sensor is an external clamp-on ultrasonic flow meter. The flow sensor is used to detect the flow rate of the fluid in the pipeline. The temperature sensor is used to detect the inlet and outlet heat of the pipeline fluid. The flow sensor and the temperature sensor are connected to the heat calculation unit through wires.
3. The outdoor integrated heat metering device according to claim 1, characterized in that: Each clamp mechanism includes a first connecting block and two C-shaped clamps hinged to both sides of one end of the first connecting block, one side of the mounting tube is connected to the other end of each first connecting block; the two free ends of the two C-shaped clamps are detachably connected, and the two C-shaped clamps can form a hollow cylindrical structure that embraces the pipeline.
4. The outdoor integrated heat metering device according to claim 3, characterized in that: The installation cylinder is provided with a plurality of through holes, each of which penetrates in the radial direction, and each elastic member is provided with a corresponding through hole; Each elastic member comprises: A movable rod, one end of which is located in the installation tube, and the other end of which passes through the corresponding through hole and extends to the outside of the installation tube; the movable rod is slidably connected to the inner wall of the through hole along the radial direction of the installation tube; A spring is sleeved on the movable rod, one end of the spring is connected to one end of the movable rod, and the other end of the spring extends along the radial direction of the mounting tube and is connected to the inner wall of the through hole; A ball is rotatably embedded in the other end of the movable rod.
5. The outdoor integrated heat metering device according to claim 4, characterized in that: One end of each movable rod is a wedge-shaped structure, and one end of the multiple movable rods of each elastic mechanism forms a notch of a conical structure; The device also includes a positioning rod, which is coaxially arranged in the installation tube, and one end of the positioning rod is a cone structure adapted to the notch.
6. The outdoor integrated heat metering device according to claim 5, characterized in that: A cover body is provided on the other end of the positioning rod to cover one end of the installation tube, and the cover body is provided with an annular clamping block; an annular clamping groove adapted to the clamping block is provided on the circumferential end surface of one end of the installation tube.
7. The outdoor integrated heat metering device according to claim 6, characterized in that: A handle is provided on the cover body.
8. The outdoor integrated heat metering device according to claim 1, characterized in that: One of the C-shaped clamps is provided with a plurality of clamping teeth along the circumferential direction, and the other C-shaped clamp is provided with an elastic sheet, and the elastic sheet is provided with a protrusion that can be clamped on the clamping teeth.
9. The outdoor integrated heat metering device according to claim 8, characterized in that: An air bag is arranged on the concave surface of each C-shaped clamp.