Foundation pit support high-low span supporting structure

Abstract

The utility model provides a high-low span supporting structure of a foundation pit support, and relates to the technical field of foundation pit supporting equipment. Comprising a supporting frame, electric telescopic rods distributed at equal intervals are installed on the top of the supporting frame, by arranging the supporting frame, the electric telescopic rods, a supporting top plate and a bottom supporting mechanism, the overall stability during equipment installation is improved, installation grooves distributed at equal intervals are reserved in side face baffles, and limiting insertion rods can be installed in the installation grooves; limiting inserting rods are inserted into a foundation pit, reinforcing treatment is conducted in a matched mode, auxiliary supporting treatment is conducted on the supporting top plate after angle adjustment is completed through a second rotating supporting plate and a second rotating rod, the whole equipment does not use a large number of power equipment for auxiliary operation, and the installation and use cost of the whole equipment is saved; and through the angle-adjustable supporting top plate, the first rotating supporting plate and the second rotating supporting plate, supporting treatment can be conveniently conducted on foundation pits with different high and low spans, and the use flexibility of the equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit supporting equipment, in particular to a foundation pit enclosure high and low span supporting structure. Background Art

[0002] The foundation pit retaining structure mainly bears the water pressure and soil pressure generated by the foundation pit excavation unloading, and transmits this pressure to the support. It is a temporary retaining wall structure for stabilizing the foundation pit. When there is a high-low span structure in the temporary foundation pit retaining structure, the traditional construction method is to re-set the retaining structure at the boundary of the high and low spans, re-support the support structure and connect it to the retaining piles before the low span excavation, and then carry out the low span excavation.

[0003] In actual work, the support structure in the existing technology requires a large investment in actual construction time, manpower, machinery and material costs, and has poor economy. At the same time, the support and buffering protection effect on the overall equipment is poor, resulting in poor overall stability. There are safety hazards in actual use, and frequent manual maintenance is required, affecting the normal support efficiency.

[0004] Therefore, the utility model provides a foundation pit enclosure high and low span supporting structure. Summary of the invention

[0005] The utility model aims to solve the shortcomings in the prior art and provide a foundation pit enclosure high and low span support structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions: a foundation pit enclosure high and low span support structure, including a support frame,

[0007] The top of the support frame is equipped with equidistantly distributed electric telescopic rods, the output ends of the electric telescopic rods are equipped with support rods, the tops of the support rods are equipped with push rods, the outer sides of the push rods are covered with support top plates, and one side of the support frame is equipped with a side limit plate;

[0008] The support frame is internally rotatably connected with a second rotatable support plate, the second rotatable support plate is located on one side of the electric telescopic rod, the top outer side of the second rotatable support plate is sleeved with a first rotatable support plate, the first rotatable support plate is rotatably connected with the support top plate, a third rotatable rod is installed inside the first rotatable support plate, the outer side of the third rotatable rod is rotatably connected with a mounting block, a second rotatable rod is installed on one side of the mounting block, the other end of the second rotatable rod is rotatably connected with the support frame, and the second rotatable support plate and the second rotatable rod are used to perform auxiliary support processing on the support top plate after the angle adjustment is completed;

[0009] A bottom supporting mechanism is installed at the bottom of the support frame, and the bottom supporting mechanism includes a counterweight roller. Two counterweight rollers are installed at the bottom of the support frame, and the two counterweight rollers are symmetrically distributed. The outer sides of the counterweight rollers are sleeved with equally distributed bottom supporting members, and the tops of the two bottom supporting members on the same side are installed with top supporting plates, and the tops of the top supporting plates are installed with equally distributed bottom connecting plates. The tops of the bottom connecting plates are fixedly connected with equally distributed buffer springs, and the insides of the buffer springs are installed with damping shock absorbers. The tops of the buffer springs are fixedly connected with intermediate connecting plates, and the tops of the intermediate connecting plates are installed with top connecting plates, and the tops of the top connecting plates are connected to the bottom of the support frame.

[0010] The overall equipment does not use a large amount of electrical equipment for auxiliary operations, saving the installation and use costs of the overall equipment. Through the adjustable angle support top plate, the first rotating support plate and the second rotating support plate, it is convenient to support foundation pits with different heights and spans, thereby improving the flexibility of equipment use.

[0011] As a preferred embodiment, side baffles are installed at both ends of the two counterweight rollers, and equidistantly distributed installation grooves are reserved inside the side baffles. Limiting rods can be installed inside the installation grooves, and the limiting rods are inserted into the foundation pit for reinforcement. An equidistantly distributed bottom support plate is installed between the two counterweight rollers and below the top support plate. The inside of the bottom support plate is threadedly connected with symmetrically distributed first positioning bolts. The bottom support plate and the installation foundation pit are positioned by the first positioning bolts, thereby improving the overall stability of the equipment during installation. The bottom of the intermediate connecting plate is threadedly connected with equidistantly distributed second positioning bolts extending into the inside of the support frame. The intermediate connecting plate, the top support plate and the support frame are reinforced and connected by the second positioning bolts. The top of the bottom connecting plate is threadedly connected with symmetrically distributed first positioning bolts. And a third positioning bolt extending to the inside of the top support plate is used to reinforce the connection between the bottom connecting plate and the top support plate, thereby realizing a reinforced connection between the bottom support mechanism and the support frame, and the buffer spring and the damping shock absorber are used to cooperate with each other for buffering and protection of the support equipment during use, thereby extending the service life of the equipment. A fifth limit pin is installed on the outer side of the first rotating support plate, and a sixth limit pin is installed on the outer side of the first rotating support plate, and the sixth limit pin is located above the fifth limit pin. The sixth limit pin is used to limit the third rotating rod and the first rotating support plate, and to perform auxiliary limiting processing on the first rotating support plate after the angle adjustment is completed to avoid the automatic resetting of the equipment. The fifth limit pin is used to limit the first rotating support plate and the second rotating support plate after the angle adjustment is completed.

[0012] The technical effect of adopting the above further scheme is: the bottom connecting plate and the top supporting plate are reinforced and connected by the third positioning bolt, thereby realizing the reinforced connection between the bottom support mechanism and the support frame, and the buffering and protection treatment of the support equipment is carried out by the buffer spring and the damping shock absorber during use, thereby extending the service life of the equipment.

[0013] As a preferred embodiment, a side reinforcement plate is installed on the outer side of the first rotating support plate, and second limit pins for cooperating with the electric telescopic rod are installed on both sides of the support frame, and a first limit pin for cooperating with the second rotating support plate is installed on one side of the second limit pin, and the bottom of the second rotating support plate after the angle adjustment is completed is limited by the first limit pin, and the second limit pin limits the multiple electric telescopic rods, thereby improving the installation stability of various internal equipment, and the top of the first rotating support plate is fixedly connected to two auxiliary connecting plates, the two auxiliary connecting plates are symmetrically distributed, and the first rotating rod is installed between the two auxiliary connecting plates, and fourth limit pins for cooperating with the first rotating rod and the auxiliary connecting plate are installed on both sides of the support top plate, and the fourth limit pin is located on one side of the third limit pin, and the first rotating support plate and the auxiliary connecting plate that have completed the angle support adjustment are positioned and installed by the fourth limit pin.

[0014] The technical effect of adopting the above further solution is: the bottom of the second rotating support plate after the angle adjustment is completed is limited by the first limit pin, and the second limit pin limits the multiple electric telescopic rods, thereby improving the installation stability of various internal equipment.

[0015] As a preferred embodiment, a third limit pin used in conjunction with the push rod is installed on one side of the supporting top plate, and the push rod is limitedly installed by the third limit pin, which facilitates the rapid disassembly and assembly of the entire equipment.

[0016] The technical effect of adopting the above further solution is: the push rod is limitedly installed by the third limit pin, which facilitates the rapid disassembly and assembly of the entire equipment.

[0017] As a preferred embodiment, a pressure sensor is fixedly connected to the bottom of the support top plate, a main control board is fixedly connected to the inside of the pressure sensor, and a control chip is fixedly connected to the outside of the main control board. The control chip is used to control the operation of the electric telescopic rod and the pressure sensor, thereby realizing unified management of power equipment and facilitating remote supervision by staff. The pressure sensor is used for pressure monitoring and processing during support.

[0018] The technical effect of adopting the above further scheme is: the control chip is used to control the operation of the electric telescopic rod and the pressure sensor, realizing the unified management of the power equipment, while facilitating remote supervision by the staff, and the pressure sensor is used for pressure monitoring and processing during support.

[0019] Compared with the prior art, the advantages and positive effects of the utility model are:

[0020] By setting a support frame, an electric telescopic rod, a support top plate and a bottom support mechanism, when in use, the sixth limit pin is used to limit the installation of the third rotating rod and the first rotating support plate, and the first rotating support plate is auxiliary limited after the angle adjustment is completed, so as to avoid the automatic resetting of the equipment. The fifth limit pin is used to limit the first rotating support plate and the second rotating support plate after the angle adjustment is completed. The push rod is limited and installed by the third limit pin, which is convenient for rapid disassembly and assembly of the overall equipment. The middle connecting plate, the top support plate and the support frame are reinforced and connected by the second positioning bolt, and the bottom connecting plate and the top support plate are reinforced and connected by the third positioning bolt, thereby realizing the reinforced connection between the bottom support mechanism and the support frame, which is convenient for use through the buffer spring and The damping shock absorber is used in conjunction with the support equipment for buffering and protection, thereby extending the service life of the equipment. The bottom support plate and the installation pit are positioned by the first positioning bolt, thereby improving the overall stability of the equipment during installation. The inside of the side baffle is reserved with equidistant installation grooves, and a limit rod can be installed inside the installation groove. The limit rod is inserted into the inside of the pit for reinforcement. The second rotating support plate and the second rotating rod are used to provide auxiliary support for the support top plate after the angle adjustment is completed. The overall equipment does not use a large amount of electrical equipment for auxiliary operations, saving the installation and use costs of the overall equipment. The support top plate with adjustable angles, the first rotating support plate and the second rotating support plate facilitate the support of pits with different heights and spans, thereby improving the flexibility of equipment use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A front view of the overall structure of a foundation pit enclosure high and low span support structure provided by the utility model;

[0022] Figure 2 A side view of the overall structure of a foundation pit enclosure high and low span support structure provided by the utility model;

[0023] Figure 3 It is an enlarged schematic diagram of the bottom support mechanism of a foundation pit enclosure high and low span support structure provided by the utility model;

[0024] Figure 4 The utility model provides a foundation pit enclosure high and low span support structure with an attachment Figure 1 A schematic diagram of the enlarged structure in FIG.

[0025] Legend:

[0026] 1. Support frame; 11. Side limit plate; 12. First limit pin; 13. Second limit pin;

[0027] 2. Electric telescopic rod; 21. Support rod; 22. Push rod;

[0028] 3. Support top plate; 31. Third limit pin; 32. Pressure sensor;

[0029] 4. First rotating support plate; 41. Side reinforcing plate; 42. Auxiliary connecting plate; 43. First rotating rod; 44. Fourth limiting pin; 45. Second rotating support plate; 46. Second rotating rod; 47. Mounting block; 48. Third rotating rod; 49. Fifth limiting pin;

[0030] 5. Bottom support member; 51. Counterweight roller; 52. Bottom support plate; 53. Top support plate; 54. Top connecting plate; 55. Bottom connecting plate; 56. Buffer spring; 57. Damping shock absorber; 58. Middle connecting plate; 59. First positioning bolt; 591. Side baffle; 592. Second positioning bolt; 593. Third positioning bolt;

[0031] 6. Sixth limit pin. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] like Figure 1-Figure 4 As shown, this embodiment provides a technical solution: a foundation pit enclosure high and low span support structure, including a support frame 1, the top of the support frame 1 is equipped with equidistantly distributed electric telescopic rods 2, the output ends of the electric telescopic rods 2 are all equipped with support rods 21, the tops of the support rods 21 are all equipped with push rods 22, the outer side of the push rods 22 is sleeved with a support top plate 3, and one side of the support frame 1 is equipped with a side limit plate 11;

[0034] The support frame 1 is internally rotatably connected with a second rotating support plate 45, and the second rotating support plate 45 is located on one side of the electric telescopic rod 2. The top outer side of the second rotating support plate 45 is sleeved with a first rotating support plate 4, and the first rotating support plate 4 is rotatably connected to the supporting top plate 3. A third rotating rod 48 is installed inside the first rotating support plate 4, and a mounting block 47 is rotatably connected to the outer side of the third rotating rod 48. A second rotating rod 46 is installed on one side of the mounting block 47, and the other end of the second rotating rod 46 is rotatably connected to the support frame 1, and the supporting top plate 3 after the angle adjustment is completed is auxiliary supported by the second rotating support plate 45 and the second rotating rod 46.

[0035] In the present scheme, a bottom supporting mechanism is installed at the bottom of the support frame 1, and the bottom supporting mechanism includes a counterweight roller 51. Two counterweight rollers 51 are installed at the bottom of the support frame 1, and the two counterweight rollers 51 are symmetrically distributed. The outer sides of the counterweight rollers 51 are sleeved with equally distributed bottom supporting members 5, and the tops of the two bottom supporting members 5 on the same side are installed with top supporting plates 53. The tops of the top supporting plates 53 are installed with equally distributed bottom connecting plates 55. The tops of the bottom connecting plates 55 are fixedly connected with equally distributed buffer springs 56, and the insides of the buffer springs 56 are installed with damping shock absorbers 57. The tops of the buffer springs 56 are fixedly connected with intermediate connecting plates 58, and the tops of the intermediate connecting plates 58 are installed with top connecting plates 54. The tops of the top connecting plates 54 are connected to the bottom of the support frame 1.

[0036] In this solution, the overall equipment does not use a large amount of electrical equipment for auxiliary operations, which saves the installation and use costs of the overall equipment. Through the adjustable angle support top plate 3, the first rotating support plate 4 and the second rotating support plate 45, it is convenient to support foundation pits with different heights and spans, thereby improving the flexibility of equipment use.

[0037] Further, such as Figure 3 As shown: In this scheme, side baffles 591 are installed at both ends of the two counterweight rollers 51, and equidistantly distributed installation grooves are reserved inside the side baffles 591. Limiting rods can be installed inside the installation grooves and inserted into the foundation pit through the limiting rods for reinforcement. Equidistantly distributed bottom support plates 52 are installed between the two counterweight rollers 51 and below the top support plate 53. The inside of the bottom support plates 52 are all threadedly connected with symmetrically distributed first positioning bolts 59.

[0038] In this solution, the bottom support plate 52 and the installation pit are positioned by the first positioning bolts 59, thereby improving the overall stability of the equipment during installation. The bottom of the intermediate connecting plate 58 is threadedly connected with second positioning bolts 592 that are equidistantly distributed and extend into the interior of the support frame 1.

[0039] In this solution, the middle connecting plate 58, the top support plate 53 and the support frame 1 are reinforced by the second positioning bolts 592, and the top threaded connection of the bottom connecting plate 55 is equidistantly distributed and extends to the inside of the top support plate 53. The bottom connecting plate 55 and the top support plate 53 are reinforced by the third positioning bolts 593, thereby realizing the reinforced connection between the bottom support mechanism and the support frame 1. When used conveniently, the buffer spring 56 and the damping shock absorber 57 are cooperated to perform buffering and protection treatment on the support equipment, thereby extending the service life of the equipment.

[0040] Further, such as Figure 4 As shown: in this solution, a fifth limit pin 49 is installed on the outer side of the first rotating support plate 4, and a sixth limit pin 6 is installed on the outer side of the first rotating support plate 4, and the sixth limit pin 6 is located above the fifth limit pin 49.

[0041] In this solution, the sixth limit pin 6 is used to limit the installation of the third rotating rod 48 and the first rotating support plate 4, and to perform auxiliary limiting processing on the first rotating support plate 4 after the angle adjustment is completed to avoid the device from resetting itself. The fifth limit pin 49 is used to limit the first rotating support plate 4 and the second rotating support plate 45 after the angle adjustment is completed.

[0042] In this solution, a side reinforcement plate 41 is installed on the outer side of the first rotating support plate 4, and second limit pins 13 used in conjunction with the electric telescopic rod 2 are installed on both sides of the support frame 1, and a first limit pin 12 used in conjunction with the second rotating support plate 45 is installed on one side of the second limit pin 13.

[0043] In this solution, the bottom of the second rotating support plate 45 after the angle adjustment is completed is limited by the first limit pin 12, and the second limit pin 13 is used to limit the multiple electric telescopic rods 2, thereby improving the installation stability of various internal devices.

[0044] In this solution, two auxiliary connecting plates 42 are fixedly connected to the top of the first rotating support plate 4. The two auxiliary connecting plates 42 are symmetrically distributed, and a first rotating rod 43 is installed between the two auxiliary connecting plates 42. Fourth limit pins 44 used in conjunction with the first rotating rod 43 and the auxiliary connecting plates 42 are installed on both sides of the supporting top plate 3.

[0045] In this solution, the fourth limiting pin 44 is located on one side of the third limiting pin 31, and the first rotating supporting plate 4 and the auxiliary connecting plate 42 that complete the angle support adjustment are positioned and installed through the fourth limiting pin 44.

[0046] Further, such as Figure 1-Figure 3 As shown, in this solution, a third limiting pin 31 used in conjunction with the push rod 22 is installed on one side of the supporting top plate 3.

[0047] In this solution, the push rod 22 is installed in a limited position by the third limiting pin 31, so as to facilitate the rapid disassembly and assembly of the whole device.

[0048] In this solution, a pressure sensor 32 is fixedly connected to the bottom of the supporting top plate 3, a main control board is fixedly connected to the inside of the pressure sensor 32, and a control chip is fixedly connected to the outside of the main control board.

[0049] In this solution, the control chip is used to control the operation of the electric telescopic rod 2 and the pressure sensor 32, realizing the unified management of the power equipment and facilitating remote supervision by the staff. The pressure sensor 32 is used for pressure monitoring and processing during support.

[0050] Working principle:

[0051] like Figure 1-4 As shown:

[0052] By setting up a support frame 1, an electric telescopic rod 2, a support top plate 3 and a bottom support mechanism, when in use, the sixth limit pin 6 is used to limit the installation of the third rotating rod 48 and the first rotating support plate 4, and to perform auxiliary limiting processing on the first rotating support plate 4 after the angle adjustment is completed to avoid the automatic resetting of the equipment. The fifth limit pin 49 is used to limit the first rotating support plate 4 and the second rotating support plate 45 after the angle adjustment is completed, and the bottom of the second rotating support plate 45 after the angle adjustment is completed is limited by the first limit pin 12.

[0053] The second limit pin 13 limits the multiple electric telescopic rods 2, thereby improving the installation stability of various internal devices. The fourth limit pin 44 is located on one side of the third limit pin 31. The first rotating support plate 4 and the auxiliary connecting plate 42 that complete the angle support adjustment are positioned and installed through the fourth limit pin 44. The push rod 22 is limited and installed through the third limit pin 31, which facilitates the rapid disassembly and assembly of the entire equipment.

[0054] The control chip is used to control the operation of the electric telescopic rod 2 and the pressure sensor 32, realizing the unified management of the power equipment and facilitating the remote supervision of the staff. The pressure sensor 32 is used for pressure monitoring and processing during support.

[0055] The middle connecting plate 58, the top support plate 53 and the support frame 1 are reinforced by the second positioning bolt 592, and the bottom connecting plate 55 and the top support plate 53 are reinforced by the third positioning bolt 593, thereby realizing the reinforced connection between the bottom support mechanism and the support frame 1. When used conveniently, the buffer spring 56 and the damping shock absorber 57 are used to cooperate with each other to perform buffering and protection treatment on the support equipment, thereby extending the service life of the equipment. The bottom support plate 52 and the installation pit are positioned by the first positioning bolt 59, thereby improving the overall stability of the equipment during installation.

[0056] The inside of the side baffle 591 is reserved with equidistantly distributed installation grooves, and a limit rod can be installed inside the installation groove. The limit rod is inserted into the inside of the foundation pit to cooperate with the reinforcement treatment, and the second rotating support plate 45 and the second rotating rod 46 are used to assist in supporting the support top plate 3 after the angle adjustment is completed.

[0057] The overall equipment does not use a large amount of electrical equipment for auxiliary operations, which saves the installation and use costs of the overall equipment. Through the adjustable angle support top plate 3, the first rotating support plate 4 and the second rotating support plate 45, it is convenient to support foundation pits with different heights and spans, thereby improving the flexibility of equipment use.

[0058] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A foundation pit enclosure high and low span support structure, comprising a support frame (1), characterized in that: The top of the support frame (1) is equipped with equidistantly distributed electric telescopic rods (2), the output ends of the electric telescopic rods (2) are all equipped with support rods (21), the tops of the support rods (21) are all equipped with push rods (22), and the outer sides of the push rods (22) are covered with a support top plate (3); The support frame (1) is rotatably connected to a second rotating support plate (45) inside, the top outer side of the second rotating support plate (45) is sleeved with a first rotating support plate (4), a third rotating rod (48) is installed inside the first rotating support plate (4), the outer side of the third rotating rod (48) is rotatably connected to a mounting block (47), and a second rotating rod (46) is installed on one side of the mounting block (47); A bottom support mechanism is installed at the bottom of the support frame (1), and the bottom support mechanism comprises a counterweight roller (51). Two counterweight rollers (51) are installed at the bottom of the support frame (1), and the outer sides of the counterweight rollers (51) are sleeved with bottom support members (5) distributed at equal intervals. Tops of the two bottom support members (5) on the same side are installed with top support plates (53), and tops of the top support plates (53) are installed with bottom connecting plates (55) distributed at equal intervals. The tops of the bottom connecting plates (55) are fixedly connected with buffer springs (56) distributed at equal intervals. The buffer springs (56) are internally installed with damping shock absorbers (57). The tops of the buffer springs (56) are fixedly connected with intermediate connecting plates (58), and the tops of the intermediate connecting plates (58) are installed with top connecting plates (54).

2. The foundation pit enclosure high and low span support structure according to claim 1 is characterized in that: Both ends of the two counterweight rollers (51) are provided with side baffles (591); between the two counterweight rollers (51) and below the top support plate (53), a bottom support plate (52) is provided with equidistant distribution; the interior of the bottom support plate (52) is threadedly connected with symmetrically distributed first positioning bolts (59); the bottom of the intermediate connecting plate (58) is threadedly connected with equidistantly distributed second positioning bolts (592) extending into the interior of the support frame (1); and the top of the bottom connecting plate (55) is threadedly connected with equidistantly distributed third positioning bolts (593) extending into the interior of the top support plate (53).

3. The high and low span support structure for foundation pit enclosure according to claim 1 is characterized in that: A fifth limit pin (49) is installed on the outer side of the first rotating support plate (4), and a sixth limit pin (6) is installed on the outer side of the first rotating support plate (4).

4. The high and low span support structure for foundation pit enclosure according to claim 3 is characterized in that: A side reinforcement plate (41) is installed on the outer side of the first rotating support plate (4), second limit pins (13) used in conjunction with the electric telescopic rod (2) are installed on both sides of the support frame (1), and a first limit pin (12) used in conjunction with the second rotating support plate (45) is installed on one side of the second limit pin (13).

5. The high and low span support structure for foundation pit enclosure according to claim 4 is characterized in that: Two auxiliary connecting plates (42) are fixedly connected to the top of the first rotating support plate (4), a first rotating rod (43) is installed between the two auxiliary connecting plates (42), and fourth limiting pins (44) used in conjunction with the first rotating rod (43) and the auxiliary connecting plates (42) are installed on both sides of the supporting top plate (3).

6. The high and low span support structure for foundation pit enclosure according to claim 1 is characterized in that: A third limiting pin (31) used in conjunction with the push rod (22) is installed on one side of the supporting top plate (3).

7. The high and low span support structure for foundation pit enclosure according to claim 6 is characterized in that: The bottom of the supporting top plate (3) is fixedly connected to a pressure sensor (32), the interior of the pressure sensor (32) is fixedly connected to a main control board, and the exterior of the main control board is fixedly connected to a control chip.

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