Battery prefabricated cabin with fire extinguishing and alarming functions

Abstract

The utility model relates to the technical field of battery prefabricated cabins, in particular to a battery prefabricated cabin with a fire extinguishing and alarming function, which is arranged to reduce the influence of fire on the whole battery prefabricated cabin by means of local isolation and fire extinguishing, so that the total loss caused by the fire can be effectively reduced, and the service life of the battery prefabricated cabin is prolonged. The safety and the reliability of the system are improved; comprising a battery prefabricated cabin, six groups of batteries and a fire extinguishing device, the fire extinguishing device comprises three sets of placing plates, three sets of partition plates, six sets of electric push rods, six sets of push plates, two sets of fire extinguishing bins, two sets of water guide pipes, two sets of spray heads, two sets of drain valves, two sets of fireproof doors, six sets of smoke sensors, six sets of temperature sensors, an alarm and a switch assembly, and the three sets of placing plates are installed at the inner end of the battery prefabricated cabin; the six groups of smoke sensors and the six groups of temperature sensors are electrically connected with the alarm, and the alarm is electrically connected with the switch assembly and the six groups of electric push rods.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery prefabricated cabin, especially to a battery prefabricated cabin with fire extinguishing alarm function. BACKGROUND

[0002] The battery prefabricated cabin refers to a container type solution of the battery energy storage system which is completed in the factory in advance, and the system is usually used in the application scenarios such as power storage, emergency power supply, grid peak shaving and frequency modulation.

[0003] The design of the battery prefabricated cabin usually considers safety, especially in the application scenarios involving the battery energy storage system (BESS), since the energy storage equipment such as lithium ion battery has potential safety hazards, such as fire risk caused by thermal runaway, and the fire extinguishing alarm device is one of the important components of the battery prefabricated cabin.

[0004] However, the existing fire extinguishing alarm device sprays water to extinguish the fire collectively to the batteries in the battery prefabricated cabin as soon as it detects the occurrence of fire, which expands the overall loss caused by the fire. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a battery prefabricated cabin with fire extinguishing alarm function, which reduces the influence of fire on the whole battery prefabricated cabin by local isolation and fire extinguishing, effectively reduces the overall loss caused by the fire, and improves the safety and reliability of the system.

[0006] The utility model discloses a battery prefabricated cabin with fire extinguishing alarm function, including battery prefabricated cabin, six groups of batteries and fire extinguishing device, six groups of batteries are installed through fire extinguishing device in the inside of battery prefabricated cabin, and fire extinguishing device includes three groups of placing plate, three groups of baffle, six groups of electric push rod, six groups of push plate, two groups of fire extinguishing storehouse, two groups of water guide pipe, two groups of spray head, two groups of drain valve, two groups of fire door, six groups of smoke sensor, six groups of temperature sensor, alarm and switch assembly, three groups of placing plate are installed in the inside end of battery prefabricated cabin, three groups of baffle are installed in the middle part of three groups of placing plate top respectively, six groups of batteries are placed in the left side and right side of three groups of battery top, six groups of electric push rod are installed in the middle part of three groups of baffle left end and right end respectively, six groups of push plate are installed in six groups of electric push rod output respectively, and six groups of push plate correspond with six groups of battery position respectively, two groups of fire extinguishing storehouse are installed in the left end and right end of battery prefabricated cabin respectively, and the left end and right end of battery prefabricated cabin are all communicated to be provided with the material guiding opening, and two groups of fire extinguishing storehouse are connected with battery prefabricated cabin through two groups of material guiding openings, and the top of two groups of material guiding openings of battery prefabricated cabin is all communicated to be provided with the sliding slot, and two groups of fire doors slide in the two groups of sliding slots of battery prefabricated cabin, and two groups of fire doors seal two groups of material guiding openings, and the input end of two groups of water guide pipe is communicated with water supply device, and the output end of two groups of water guide pipe passes through the top of two groups of fire extinguishing storehouse and is connected with two groups of spray head, and the lower side of the outer end of two groups of fire extinguishing storehouse is all communicated to be provided with the drain pipe, and two groups of drain valves are installed on two groups of drain pipes respectively, and six groups of smoke sensors and six groups of temperature sensors are installed in the left side and right side of the top of battery prefabricated cabin and the left side and right side of the bottom of two groups of placing plates on the top respectively, and six groups of smoke sensors and six groups of temperature sensors correspond with six groups of battery position respectively, and switch assembly is installed in the top of battery prefabricated cabin, and switch assembly is connected with two groups of fire doors, and alarm is installed in the top of battery prefabricated cabin, and six groups of smoke sensors and six groups of temperature sensors are electrically connected with alarm, and alarm is electrically connected with switch assembly and six groups of electric push rod.

[0007] Preferably, the switch assembly includes two hydraulic cylinders and two connecting plates, the left and right sides of the top of the battery prefabricated cabin are provided with mounting grooves, the two hydraulic cylinders are installed in the two mounting grooves of the battery prefabricated cabin respectively, the two connecting plates are installed on the inner top sides of the two fire doors respectively, and the output ends of the two hydraulic cylinders are connected with the two connecting plates respectively.

[0008] Preferably, the utility model also includes two support plates, multiple telescopic pipes, multiple telescopic rods and multiple springs, the multiple telescopic pipes are evenly installed in the inner bottom of the two fire extinguishing storehouses, the multiple telescopic rods are slidably connected with the multiple telescopic pipes respectively, the top ends of the multiple telescopic rods are connected with the bottom ends of the two support plates respectively, the two support plates are slidably connected with the inner ends of the two fire extinguishing storehouses, and the multiple springs are sleeved on the multiple telescopic rods respectively.

[0009] Preferably, the six groups of material guiding groove plates are connected with the left and right ends of the three groups of placing plates, and the outer ends of the six groups of material guiding groove plates are connected with the left and right ends of the battery prefabricated cabin.

[0010] Preferably, the two groups of rotating joints are connected with the two groups of water guiding pipes, and the spray heads are set as small mist nozzles.

[0011] Preferably, the four groups of fixed plates are installed on the upper front and rear sides of the inner ends of the two groups of fireproof doors, and the four groups of guide rods are installed on the top ends of the four groups of fixed plates.

[0012] Preferably, the placing plates, the partition plates, the electric push rods, the push plates, the fire extinguishing bins, the water guiding pipes, the spray heads, the fireproof doors, the support plates, the telescopic pipes, the telescopic rods, the springs, the material guiding groove plates and the guide rods are made of high-temperature-resistant and corrosion-resistant materials.

[0013] Preferably, the top end of the support plate is provided with a rubber pad.

[0014] Compared with the prior art, the six groups of smoke sensors and the six groups of temperature sensors can detect the temperature and smoke of the six groups of batteries in real time, and when the temperature and smoke detected by a group of smoke sensors and the corresponding temperature sensors exceed the specified value, the smoke sensor and the temperature sensor control the alarm to alarm, which indicates that the battery corresponding to the smoke sensor and the temperature sensor is in high temperature and fire, the alarm opens the switch assembly according to the position of the battery, the switch assembly drives the corresponding fireproof door to move upward and open, then the alarm drives the corresponding electric push rod to drive the push plate to move, the push plate pushes the battery on the placing plate into the corresponding fire extinguishing bin, then the switch assembly closes the fireproof door, thereby sealing the battery prefabricated cabin, then the water is sprayed out from the spray head through the water guiding pipe, and the water sprayed out from the spray head extinguishes the fire of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of the utility model;

[0016] Figure 2 is Figure 1 is an enlarged structural schematic diagram of A in the figure;

[0017] Figure 3 is Figure 1 An enlarged structural schematic view of B in the middle;

[0018] Figure 4 is Figure 1 An enlarged structural schematic view of A in the middle;

[0019] In the drawings, 1 is a battery prefabricated cabin, 2 is a battery, 3 is a placing plate, 4 is a partition plate, 5 is an electric push rod, 6 is a push plate, 7 is a fire extinguishing bin, 8 is a water guide pipe, 9 is a spray head, 10 is a drain pipe, 11 is a drain valve, 12 is a fireproof door, 13 is a smoke sensor, 14 is a temperature sensor, 15 is an alarm, 16 is a hydraulic cylinder, 17 is a connecting plate, 18 is a supporting plate, 19 is a telescopic pipe, 20 is a telescopic rod, 21 is a spring, 22 is a material guide groove plate, 23 is a rotary joint, 24 is a fixing plate, and 25 is a guide rod. DETAILED DESCRIPTION

[0020] The specific embodiments of the present application will be further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0021] As Figures 1 to 4The utility model discloses a battery prefabricated cabin with fire extinguishing alarm function, including battery prefabricated cabin 1, six groups of batteries 2 and fire extinguishing device, six groups of batteries 2 are installed in battery prefabricated cabin 1 inside through fire extinguishing device, and fire extinguishing device includes three groups of placing plate 3, three groups of baffle 4, six groups of electric push rod 5, six groups of push plate 6, two groups of fire extinguishing storehouse 7, two groups of water guide pipe 8, two groups of spray head 9, two groups of drain valve 11, two groups of fireproof door 12, six groups of smoke sensor 13, six groups of temperature sensor 14, alarm 15 and switch assembly, three groups of placing plate 3 are installed in the inner end of battery prefabricated cabin 1, three groups of baffle 4 are installed in the middle part of three groups of placing plate 3 top respectively, six groups of batteries 2 are placed in the left side and right side of three groups of battery 2 top, six groups of electric push rod 5 are installed in the middle part of three groups of baffle 4 left end and right end respectively, six groups of push plate 6 are installed in six groups of electric push rod 5 output respectively, and six groups of push plate 6 are corresponding with six groups of battery 2 position respectively, two groups of fire extinguishing storehouse 7 are installed in the left end and right end of battery prefabricated cabin 1, and the left end and right end of battery prefabricated cabin 1 are all communicated to be provided with material guide hole, and two groups of fire extinguishing storehouse 7 are connected with battery prefabricated cabin 1 through two groups of material guide hole, and the top of two groups of material guide hole of battery prefabricated cabin 1 is all communicated to be provided with the sliding slot, and two groups of fireproof door 12 slide in the two groups of sliding slots of battery prefabricated cabin 1, and two groups of fireproof door 12 seal two groups of material guide hole, and the input end of two groups of water guide pipe 8 is communicated with water supply device, and the output end of two groups of water guide pipe 8 is connected with two groups of spray head 9 through two groups of fire extinguishing storehouse 7 top, and the lower side of the outer end of two groups of fire extinguishing storehouse 7 is all communicated to be provided with drain pipe 10, and two groups of drain valve 11 are installed on two groups of drain pipe 10 respectively, and six groups of smoke sensor 13 and six groups of temperature sensor 14 are installed in the left side and right side of the inner top of battery prefabricated cabin 1 and the left side and right side of the bottom end of two groups of placing plate 3 upper side respectively, and six groups of smoke sensor 13 and six groups of temperature sensor 14 are corresponding with six groups of battery 2 position, and switch assembly is installed in the top of battery prefabricated cabin 1, and switch assembly is connected with two groups of fireproof door 12, and alarm 15 is installed in the top of battery prefabricated cabin 1, and six groups of smoke sensor 13 and six groups of temperature sensor 14 are electrically connected with alarm 15, and alarm 15 is electrically connected with switch assembly and six groups of electric push rod 5,

[0022] Six groups of smoke sensors 13 and six groups of temperature sensors 14 detect the temperature and smoke of the six groups of batteries 2 in real time. When a group of smoke sensors 13 and the corresponding temperature sensor 14 detect that the temperature and smoke exceed the specified value, the smoke sensor 13 and the temperature sensor 14 control the alarm 15 to alarm, indicating that the battery 2 corresponding to the smoke sensor 13 and the temperature sensor 14 has a high temperature fire. The alarm 15 opens the switch assembly according to the position of the battery 2, and the switch assembly drives the corresponding fire door 12 to move upward and open. Then the alarm 15 controls the corresponding electric push rod 5 to drive the push plate 6 to move, and the push plate 6 pushes the battery 2 on the placing plate 3 into the corresponding fire extinguishing bin 7. Then the switch assembly closes the fire door 12, thereby sealing the battery prefabricated cabin 1. Then water is sprayed from the nozzle 9 through the water guide pipe 8, and the water sprayed from the nozzle 9 extinguishes the fire of the battery. By setting this device, the local isolation and fire extinguishing method can reduce the impact of the fire on the entire battery prefabricated cabin 1, effectively reduce the overall loss caused by the fire, and improve the safety and reliability of the system.

[0023] As a preferred embodiment of the above embodiment, the switch assembly includes two groups of hydraulic cylinders 16 and two groups of connecting plates 17. The left and right sides of the top end of the battery prefabricated cabin 1 are provided with mounting grooves, the two groups of hydraulic cylinders 16 are respectively installed in the two groups of mounting grooves of the battery prefabricated cabin 1, the two groups of connecting plates 17 are respectively installed on the upper sides of the inner ends of the two groups of fire doors 12, and the output ends of the two groups of hydraulic cylinders 16 are respectively connected with the two groups of connecting plates 17. The two groups of hydraulic cylinders 16 are electrically connected with the alarm 15.

[0024] By setting the hydraulic cylinder 16 and the connecting plate 17, the alarm 15 controls the corresponding hydraulic cylinder 16 to open according to the position of the battery 2, and the hydraulic cylinder 16 drives the corresponding fire door 12 to open through the connecting plate 17, thereby facilitating the automatic control of the opening and closing of the corresponding fire door 12.

[0025] As a preferred embodiment of the above embodiment, it further includes two groups of support plates 18, a plurality of telescopic pipes 19, a plurality of telescopic rods 20 and a plurality of springs 21. The plurality of telescopic pipes 19 are evenly installed at the bottom ends of the plurality of fire extinguishing bins 7, the plurality of telescopic rods 20 are respectively connected with the plurality of telescopic pipes 19 in a sliding manner, the top ends of the plurality of telescopic rods 20 are respectively connected with the bottom ends of the two groups of support plates 18, the two groups of support plates 18 are connected with the inner ends of the two groups of fire extinguishing bins 7 in a sliding manner, and the plurality of springs 21 are respectively sleeved on the plurality of telescopic rods 20.

[0026] By setting the support plate 18, the telescopic pipe 19, the telescopic rod 20 and the spring 21, when the battery is introduced into the fire extinguishing bin 7, the battery falls on the support plate 18 and is buffered and protected by the plurality of telescopic pipes 19, the plurality of telescopic rods 20 and the plurality of springs 21. The battery can be preliminarily buffered by the telescopic pipe and the telescopic rod, and the remaining impact energy of the battery can be further absorbed by the spring.

[0027] As a preferred embodiment of the above, it further comprises six groups of material guide groove plates 22, the inner ends of the six groups of material guide groove plates 22 are respectively connected with the left end and the right end of the three groups of placement plates 3, the outer ends of the six groups of material guide groove plates 22 are respectively connected with the left end and the right end in the battery prefabricated cabin 1, and the six groups of material guide groove plates 22 are in an inclined shape;

[0028] By setting the material guide groove plate 22, the battery can be guided.

[0029] As a preferred embodiment of the above, it further comprises two groups of rotary joints 23, the two groups of spray heads 9 are respectively connected with the output ends of the two groups of water guide pipes 8 through the two groups of rotary joints 23, and the spray head 9 is set as a fine mist nozzle;

[0030] By setting the rotary joint 23, the spray head 9 can rotate freely under the action of the rotary joint 23, which can ensure that the spray head 9 can change direction as needed while spraying water, so as to more effectively cover the fire extinguishing area, and the spray head 9 is set as a fine mist nozzle, which is suitable for the case where the water quantity needs to be accurately controlled, and the damage to the battery module is reduced.

[0031] As a preferred embodiment of the above, it further comprises four groups of fixed plates 24 and four groups of guide rods 25, the four groups of fixed plates 24 are respectively installed on the front upper side and the rear upper side of the inner ends of the two groups of fireproof doors 12, the four groups of guide rods 25 are respectively installed on the top ends of the four groups of fixed plates 24, the left front part, the left rear part, the right front part and the right rear part of the top end of the battery prefabricated cabin 1, and the front part and the rear part of the upper two groups of material guide groove plates 22 are all provided with sliding holes, and the four groups of guide rods 25 are respectively connected with the sliding holes of the battery prefabricated cabin 1 and the upper two groups of material guide groove plates 22 in a sliding manner;

[0032] By setting the fixed plate 24 and the guide rod 25, the stability of the fireproof door 12 during movement can be improved.

[0033] As a preferred embodiment of the above, the placement plate 3, the partition plate 4, the electric push rod 5, the push plate 6, the fire extinguishing bin 7, the water guide pipe 8, the spray head 9, the fireproof door 12, the support plate 18, the telescopic pipe 19, the telescopic rod 20, the spring 21, the material guide groove plate 22 and the guide rod 25 are all set as high-temperature-resistant and corrosion-resistant materials;

[0034] It can ensure that the parts can work stably for a long time in a high-temperature environment.

[0035] As a preferred embodiment of the above, the top end of the support plate 18 is provided with a rubber pad;

[0036] The friction between the support plate 18 and the battery 2 can be increased, so as to prevent the battery 2 from sliding or rolling when impacted.

[0037] The utility model discloses a battery prefabricated cabin with fire extinguishing alarm function, its installation mode, connecting mode or setting mode are all common mechanical mode, can carry out implementation as long as can reach its beneficial effect, the electric push rod 5, smoke sensor 13, temperature sensor 14, alarm 15 and hydraulic cylinder 16 of a battery prefabricated cabin with fire extinguishing alarm function of the utility model are purchased on the market, and the technical personnel in this industry only need to install and operate according to its attached instruction book.

[0038] The utility model discloses a battery prefabricated cabin with fire extinguishing alarm function, its installation mode, connecting mode or setting mode are all common mechanical mode, can carry out implementation as long as can reach its beneficial effect, the electric push rod 5, smoke sensor 13, temperature sensor 14, alarm 15 and hydraulic cylinder 16 of a battery prefabricated cabin with fire extinguishing alarm function of the utility model are purchased on the market, and the technical personnel in this industry only need to install and operate according to its attached instruction book.

[0039] The above only is the preferred implementation of the utility model, should point out, for the ordinary technical personnel of this technical field, on the premise of not departing from the technical principle of the utility model, can also make a number of improvements and variations, these improvements and variations also should be regarded as the protection range of the utility model.

Claims

1. A battery prefabricated cabin with fire extinguishing alarm function, characterized in that, The utility model provides a battery prefabricated cabin, six groups of batteries and fire extinguishing device, six groups of batteries (2) are installed in the inside of battery prefabricated cabin (1) through fire extinguishing device, and fire extinguishing device includes three groups of placement board (3), three groups of partition (4), six groups of electric push rod (5), six groups of push plate (6), two groups of fire extinguishing storehouse (7), two groups of water guide pipe (8), two groups of shower nozzle (9), two groups of drain valve (11), two groups of fire door (12), six groups of smoke sensor (13), six groups of temperature sensor (14), alarm (15) and switch assembly, three groups of placement board (3) are installed in the inside end of battery prefabricated cabin (1), three groups of partition (4) are installed in the top middle part of three groups of placement board (3) respectively, six groups of batteries (2) are placed in the left side and right side of three groups of battery (2) top, six groups of electric push rod (5) are installed in the middle part of three groups of partition (4) left end and right end respectively, six groups of push plate (6) are installed in six groups of electric push rod (5) output respectively, and six groups of push plate (6) are corresponding with six groups of battery (2) position respectively, two groups of fire extinguishing storehouse (7) are installed in the left end and right end of battery prefabricated cabin (1) respectively, and the left end and right end of battery prefabricated cabin (1) are all communicated to be provided with material guiding opening, two groups of fire extinguishing storehouse (7) are connected with battery prefabricated cabin (1) through two groups of material guiding opening, and the top of two groups of material guiding opening of battery prefabricated cabin (1) is all communicated to be provided with sliding slot, two groups of fire door (12) slide in the two groups of sliding slot of battery prefabricated cabin (1), and two groups of fire door (12) seal two groups of material guiding opening, two groups of water guide pipe (8) input are communicated with water supply device, and two groups of water guide pipe (8) output pass through two groups of fire extinguishing storehouse (7) top and are connected with two groups of shower nozzle (9), and the lower side of two groups of fire extinguishing storehouse (7) outer end is all communicated to be provided with drain pipe (10), two groups of drain valve (11) are installed on two groups of drain pipe (10) respectively, six groups of smoke sensor (13) and six groups of temperature sensor (14) are installed in the left side and right side of battery prefabricated cabin (1) top and the left side and right side of two groups of placement board (3) bottom respectively, and six groups of smoke sensor (13) and six groups of temperature sensor (14) are corresponding with six groups of battery (2) position, switch assembly is installed in the top of battery prefabricated cabin (1), and switch assembly is connected with two groups of fire door (12) cooperation, alarm (15) is installed in the top of battery prefabricated cabin (1), six groups of smoke sensor (13) and six groups of temperature sensor (14) are electrically connected with alarm (15), and alarm (15) is electrically connected with switch assembly and six groups of electric push rod (5).

2. The battery prefabricated cabin with fire extinguishing and alarm functions according to claim 1, characterized in that, Switch assembly includes two groups of hydraulic cylinder (16) and two groups of connecting plate (17), and the left side and right side of battery prefabricated cabin (1) top are all provided with mounting groove, two groups of hydraulic cylinder (16) are installed in the two groups of mounting groove of battery prefabricated cabin (1) respectively, two groups of connecting plate (17) are installed in the upper side of two groups of fire door (12) inner end respectively, and the output of two groups of hydraulic cylinder (16) is connected with two groups of connecting plate (17) respectively, and two groups of hydraulic cylinder (16) are electrically connected with alarm (15).

3. The battery prefabricated cabin with fire extinguishing and alarm functions according to claim 2, characterized in that, It also includes two sets of support plates (18), multiple sets of telescopic pipes (19), multiple sets of telescopic rods (20) and multiple sets of springs (21), the multiple sets of telescopic pipes (19) are evenly installed at the bottom ends of the two sets of fire extinguishing warehouses (7), the multiple sets of telescopic rods (20) are respectively connected with the multiple sets of telescopic pipes (19) in sliding mode, the top ends of the multiple sets of telescopic rods (20) are respectively connected with the bottom ends of the two sets of support plates (18), the two sets of support plates (18) are connected with the inner ends of the two sets of fire extinguishing warehouses (7) in sliding mode, and the multiple sets of springs (21) are respectively sleeved on the multiple sets of telescopic rods (20).

4. The battery prefabricated cabin with fire extinguishing and alarm functions according to claim 3, characterized in that, It also includes six sets of material guide groove plates (22), the inner ends of the six sets of material guide groove plates (22) are respectively connected with the left ends and the right ends of the three sets of placement plates (3), the outer ends of the six sets of material guide groove plates (22) are respectively connected with the left ends and the right ends in the battery prefabricated cabin (1), and the six sets of material guide groove plates (22) are inclined.

5. The battery prefabricated cabin with fire extinguishing and alarm functions according to claim 4, characterized in that, It also includes two sets of rotary joints (23), the two sets of nozzles (9) are respectively connected with the output ends of the two sets of water guide pipes (8) through the two sets of rotary joints (23), and the nozzle (9) is provided as a fine mist nozzle.

6. The battery prefabricated cabin with fire extinguishing and alarm functions according to claim 5, characterized in that, It also includes four sets of fixed plates (24) and four sets of guide rods (25), the four sets of fixed plates (24) are respectively installed on the front upper sides and the rear upper sides of the inner ends of the two sets of fireproof doors (12), the four sets of guide rods (25) are respectively installed on the top ends of the four sets of fixed plates (24), the left front part, the left rear part, the right front part and the right rear part of the top end of the battery prefabricated cabin (1) and the front part and the rear part of the upper two sets of material guide groove plates (22) are all provided with sliding holes, and the four sets of guide rods (25) are respectively connected with the sliding holes of the battery prefabricated cabin (1) and the upper two sets of material guide groove plates (22) in sliding mode.

7. The battery prefabricated enclosure with fire extinguishing and alarm functions according to claim 6, characterized in that, The placement plate (3), the partition plate (4), the electric push rod (5), the push plate (6), the fire extinguishing warehouse (7), the water guide pipe (8), the nozzle (9), the fireproof door (12), the support plate (18), the telescopic pipe (19), the telescopic rod (20), the spring (21), the material guide groove plate (22) and the guide rod (25) are all provided as high-temperature-resistant and corrosion-resistant materials.

8. The battery prefabricated enclosure with fire extinguishing and alarm functions according to claim 7, characterized in that, The top end of the support plate (18) is provided with a rubber pad.

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