CN215573297U

CN215573297U - Flat-plate composite dynamic truck scale layout system

Info

Publication number: CN215573297U
Application number: CN202121798947.3U
Authority: CN
Inventors: 汤世友; 戴星; 魏川
Original assignee: Sichuan Stone Edge Polytron Technologies Inc
Current assignee: Sichuan Stone Edge Polytron Technologies Inc
Priority date: 2021-08-04
Filing date: 2021-08-04
Publication date: 2022-01-18
Anticipated expiration: 2031-08-04

Abstract

The utility model discloses a flat-plate composite dynamic truck scale layout system, and belongs to the technical field of truck scales. A flat-plate composite dynamic truck scale layout system mainly comprises: the foundation pit is formed by an upper foundation pit and a lower channel arranged in the middle of the upper foundation pit, and a first blind hole is formed in the position, close to the pit wall, of the upper foundation pit; the foundation pit is transversely dug in the roadbed; the frame body is U-shaped and can be placed in the foundation pit in a matching manner; the bottom surface of the frame body is provided with a groove-shaped hole corresponding to the position of the lower channel; the weighing sensor is of a plate type, and a first through hole opposite to the first threaded hole is formed in the opposite end of the weighing sensor in the width direction; a lead means, which mates with the load cell, is disposed in the lower channel through the slot-shaped aperture. The layout system is simple, convenient and fast, and convenient to disassemble; the truck scale has high precision and long service life, and is convenient for component replacement and operation and maintenance management.

Description

Flat-plate composite dynamic truck scale layout system

Technical Field

The utility model belongs to the technical field of truck scales, and particularly relates to a flat-plate composite dynamic truck scale layout system.

Background

At present, traffic management is more and more intelligent and convenient; vehicle overload monitoring on roads is also more and more intelligent; in particular, in the case of a platform truck scale used in recent years, automatic and uninterrupted vehicle overload monitoring can be realized by burying the platform truck scale on a road, but the structure and the installation mode of the platform truck scale are particularly important for the precision, the service life and the later operation and maintenance.

The truck scale consists of a weighing area, a weighing sensor and a weighing display control device, and is fixedly arranged in front of a toll station of a crossing or a highway, so that the vehicle flow is large, and great challenges are brought to limit control and overload enforcement; meanwhile, the difference between the weighing area and the ground material is large, and the road surface is sunken or the platform is uneven after long-time use, so that the test precision of the truck scale is influenced. Traditional car weighing system generally contains solitary weighing sensor, shaft sensor, speed sensor, drive shaft and detects the sensor, and every kind of sensor function is single, and entire system is huge and complicated, and the installation is dismantled the difficulty, and hardly realizes the mutual application of various sensor information systematics. Therefore, a dynamic automobile scale layout system which is high in precision, convenient to install and disassemble, long in service life, capable of integrating weighing, speed measuring, axle information and driving shaft detection and convenient to operate and maintain is urgently needed to be researched and developed.

SUMMERY OF THE UTILITY MODEL

Aiming at the existing problems, the utility model provides a flat-plate composite dynamic truck scale layout system which is simple, convenient and fast, is convenient to disassemble and is convenient for part replacement and operation and maintenance management.

The technical scheme adopted by the utility model is as follows:

a flat panel composite dynamic vehicle scale layout system comprising:

the foundation pit is formed by an upper foundation pit and a lower channel arranged in the middle of the upper foundation pit, and a first blind hole is formed in the position, close to the pit wall, of the upper foundation pit; the foundation pit is transversely dug in the roadbed;

the frame body is U-shaped and can be placed in the foundation pit in a matching manner; the bottom surface of the frame body is provided with a groove-shaped hole corresponding to the position of the lower channel; first threaded holes opposite to the first blind holes are formed in the positions, close to the side wall of the frame body, of the two sides of the groove-shaped hole; a bolt is in threaded connection with the frame body through the first threaded hole and enters the first blind hole to the bottom of the first blind hole;

the weighing sensor is plate-shaped, a first through hole opposite to the first threaded hole is formed in the opposite end of the weighing sensor in the width direction, the head of the bolt penetrates through the first through hole to place the weighing sensor into the frame, and the head of the bolt is in threaded connection with the nut to fix the weighing sensor in the frame, so that the weighing sensor is fixed; a lead device matched with the weighing sensor is placed in the lower channel through the slot-shaped hole;

and the glue layer is positioned between the frame body and the foundation pit and used for fixing the frame body and filling a gap between the frame body and the foundation pit.

Furthermore, isolation layers are arranged on the side surface and the bottom surface of the weighing sensor; and the upper surface of the weighing sensor is provided with a wear-resistant layer.

Further, the isolation layer is made of materials with buffer property, shock resistance and moisture resistance.

Further, the weighing sensor comprises a weighing platform and a force measuring sensor, wherein the force measuring sensor is in threaded connection, welded, riveted or connected with the bottom of the weighing platform through a fastener; or the weighing platform and the force measuring sensor are integrated to form the weighing sensor.

Further, the force measuring sensor is a transverse and longitudinal force measuring device or a longitudinal force measuring device.

Further, the force measuring sensors are arranged in an array.

Furthermore, a signal wire is connected to a conductive element inside the force measuring sensor, the signal wire is led out from the side edge of the force measuring sensor and penetrates through a threading channel in the weighing platform to be converged at a wire outlet port located on the end face of the bottom of the weighing platform, and the signal wire is led out by the wire outlet port, penetrates through a wire leading device and then is connected with the controller.

Furthermore, the cross section of the weighing platform is in a convex shape, and two lower end faces of the weighing platform are provided with first through holes opposite to the first threaded holes; the head of the bolt penetrates through the first through hole to place a plurality of weighing sensors in close proximity side by side or a single weighing sensor into the frame; pressing strips are pressed in a groove formed by the weighing sensor and the side wall of the frame body, counter bores opposite to the first through holes are arranged in the length direction of the pressing strips at intervals, the head of the bolt penetrates through the counter bores to press the pressing strips in the groove, and the head of the bolt is in threaded connection with a nut to fix the pressing strips, so that the weighing sensor is fixed.

Furthermore, a dovetail groove is formed in the surface of the weighing platform.

Further, the lead device comprises a device front end and a device rear end; the front end of the device is placed into the wire outlet port, and the rear end of the device is in threaded connection with the weighing platform.

Furthermore, a sealing ring is arranged on the periphery of the front end head of the device, and the rear end of the device comprises an end cover main body, a conical sealing body, a sealing joint and a pressing cap; the middle part of the front end of the device is provided with a hole and extends to the lower end of the end cover main body to form a second blind hole, a first cylindrical hole communicated with the second blind hole, a conical through hole communicated with the first cylindrical hole and a second cylindrical hole communicated with the conical through hole are sequentially arranged on one side wall of the end cover main body, and the first cylindrical hole, the conical through hole, the second cylindrical hole and the second blind hole form an L-shaped passage; the bottom of the end cover main body is provided with a threaded hole, and the weighing platform is provided with a threaded hole; placing the front end head of the device into a wire outlet port and connecting the end cover main body with the weighing platform in a threaded manner through a bolt;

the middle part of the conical sealing body is provided with a wire hole; the conical sealing body is embedded into the conical through hole in a matching manner;

the front end of the sealing joint is in threaded connection with the second cylindrical hole in a matching manner; the rear end of the sealing joint is provided with a clamping groove; an air pipe is sleeved in the clamping groove;

the middle of the pressing cap is provided with a through hole for leading out an air pipe, the pressing cap is in threaded connection with the sealing joint and clamps one end of the air pipe in the clamping groove to fix the air pipe; the signal wire passes through the passage and enters the trachea.

Furthermore, the periphery of the front end of the device is provided with an annular groove, and a sealing ring is arranged in the annular groove.

Has the advantages that:

1. the utility model provides a flat-plate composite dynamic truck scale layout system, which enables weighing sensors to be stably arranged and convenient to disassemble and assemble through the arrangement of a special frame body; the weighing sensor is stably installed and is easier to disassemble and assemble through the layout of the weighing sensor and the arrangement of the pressing strips; through setting up the special construction foundation ditch, put into weighing sensor's lead wire device, this kind of overall arrangement winding displacement mode is unique, and winding displacement mode leakproofness is good, and lead wire device's special construction has guaranteed that weighing sensor's leakproofness is good. The rigidity characteristic of the layout system is more obvious, so that the damage degree of the system after being stressed is reduced, and the service life of the system is prolonged; meanwhile, the layout system is high in test precision, simple and convenient in layout, convenient to disassemble and convenient to replace parts and manage operation and maintenance.

2. The utility model provides a flat plate composite dynamic vehicle scale layout system.A vehicle wheel shaft presses a weighing sensor, a signal is transmitted to an outlet port, a series of point location information is transmitted to a controller through a signal line, the controller can output the wheel shaft information according to the series of point location information through a self data processing system, and the weighing information can be obtained through summation operation of the point location information. The longitudinal force measuring device is used as a force measuring sensor, and point location information obtained when a vehicle passes through the weighing sensor can be used for identifying vehicle axle information and weight information through array arrangement of the force measuring sensor. The method comprises the following steps that transverse force measuring devices and longitudinal force measuring devices are used as force measuring sensors, vehicles pass through weighing sensors through the force measuring sensors in an array mode, and point location information obtained by the longitudinal force measuring devices in the weighing sensors can be used for identifying vehicle axle information and weight information; the point location information obtained by the transverse force measuring device in the weighing sensor can be used for identifying whether the driving shaft is driven or not, and a powerful basis is provided for judging whether the overload and overload are exceeded or not.

3. The utility model provides a flat-plate composite dynamic automobile scale layout system, when a vehicle passes through the layout system, the vehicle runs in the length direction of a weighing sensor, so that the time for the vehicle to pass through the layout system is relatively long, the rolling time of tires on a weighing platform is long, the speed of the vehicle passing through the weighing sensor is calculated to be the running speed of the vehicle, the dynamic weighing is staticized, the testing speed range is widened, the precision of the automobile scale is higher, and a favorable basis is provided for judging overspeed.

4. The glue layer is arranged between the frame body and the foundation pit and used for fixing the frame body and filling the gap between the frame body and the foundation pit, so that the frame body is more stable, and a solid foundation is laid for stable installation of the weighing sensor; the upper surface of the weighing sensor is provided with a wear-resistant layer for simulating a roadbed, so that the difference between the wear-resistant layer and roadbed materials is reduced, the property of a layout system is equivalent to that of the ground, the weighing sensor is prevented from deviating from the roadbed after being used for a long time, and further, the weighing scale of a vehicle is prevented from being jumped at a high speed, so that the measurement is not accurate; meanwhile, the body is prevented from being damaged due to long-time compression of the weighing sensor, and the influence of an external medium on the weighing sensor is reduced.

Drawings

FIG. 1 is a schematic diagram of a layout system of a flat composite dynamic truck scale according to the present invention;

FIG. 2 is a schematic plan view of a foundation pit of the composite dynamic truck scale layout system of the present invention;

FIG. 3 is a schematic diagram of a frame of a layout system of a flat panel composite dynamic vehicle scale according to the present invention;

FIG. 4 is a schematic top view of a load cell of an embodiment of a flat panel composite dynamic vehicle scale layout system of the present invention;

FIG. 5 is a schematic view of a trim strip of an embodiment of a layout system of a flat-panel composite dynamic motor truck scale according to the present invention;

FIG. 6 is a schematic diagram of an embodiment of a flat panel composite dynamic vehicle scale layout system according to the present invention;

FIG. 7 is a schematic diagram of a lead device of a layout system of a flat panel composite dynamic vehicle scale according to the present invention;

FIG. 8 is a schematic view of a sealing joint of a flat composite dynamic truck scale layout system according to the present invention

Fig. 9 is a schematic bottom view of a load cell of an embodiment of the system of the present invention.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the utility model by referring to the description text.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof. In the description of the present invention, it should be noted that, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, a direct connection, or a communication between two elements, and those skilled in the art will understand the specific meaning of the above terms in the present invention specifically.

Examples

As shown in fig. 1-9, a flat panel composite dynamic vehicle scale layout system includes:

the foundation pit 1 is formed by an upper foundation pit 11 and a lower channel 12 arranged in the middle of the upper foundation pit 11, and a first blind hole 111 is formed in the upper foundation pit 11 and close to the pit wall; the foundation pit 1 is transversely dug in the roadbed 10;

the frame body 2 is U-shaped and can be placed in the foundation pit 1 in a matching manner; the bottom surface of the frame body 2 is provided with a groove-shaped hole 21 corresponding to the position of the lower channel 12; a first threaded hole 22 opposite to the first blind hole 111 is formed in the position, close to the side wall of the frame body 2, of two sides of the slot-shaped hole 21; a bolt is screwed with the frame body 2 through the first threaded hole 22 and enters the first blind hole 111 to the bottom of the first blind hole 111;

the weighing sensor 3 is in a plate shape, a first through hole 31 opposite to the first threaded hole 22 is formed in the opposite end of the weighing sensor in the width direction, the head of the bolt penetrates through the first through hole 31 to place the weighing sensor 3 into the frame body 2, and the head of the bolt is in threaded connection with the nut to fix the weighing sensor 3 into the frame body 2, so that the weighing sensor 3 is fixed; the lead wire device 4 matched with the weighing sensor 3 is placed in the lower channel 12 through the slot-shaped hole 21;

and the glue layer 5 is positioned between the frame body 2 and the foundation pit 1 and used for fixing the frame body 2 and filling a gap between the frame body 2 and the foundation pit 1.

In the technical scheme, the weighing sensors 3 are stably arranged, stably installed and conveniently disassembled and assembled through the arrangement of the special frame body; through setting up the design of channel 12 and the slot hole 21 of framework 2 under the special construction foundation ditch 1, put into weighing sensor 3's lead wire device 4, this kind of overall arrangement winding displacement mode is unique, and lead wire device 4 lead wire winding displacement leakproofness is good, has guaranteed weighing sensor 3's precision. After the foundation pit 1 is dug, firstly, an adhesive layer is laid on the upper foundation pit 11, the first blind hole 111 is opened, and then the frame body 2 is arranged in the foundation pit 1 in a matching manner. The layout system is simple, convenient and fast, is convenient to disassemble, and is convenient for part replacement and operation and maintenance management.

In one embodiment of the present invention, the weighing sensor 3 is provided with isolation layers (not shown) on both sides and bottom; the upper surface of the load cell is provided with a wear layer (not shown). In this way, it is convenient to replace and disassemble the load cell 3, making the load cell 3 easy to disengage from the system; set up the wearing layer, the wearing layer simulation road bed when system installation accomplishes, adjusts it (polishes, or need not to polish) and makes it flush with the road surface, and the vehicle of being convenient for steadily traveles and has protected weighing sensor, prolongs its life.

In an embodiment of the utility model, the isolation layer is made of a material having cushioning, shock resistance and moisture resistance. In this way, after the system is stressed, the isolation layer (not shown) of the weighing sensor 3 has buffering and shock-resistant functions, so that the weighing sensor 3 is prevented from being damaged by violent stress; meanwhile, the corrosion of moisture to the weighing sensor 3 can be slowed down, the main body of the weighing sensor 3 is further protected, and the service life of the weighing sensor is relatively prolonged.

In an embodiment of the present invention, as shown in fig. 9, the load cell 3 includes a platform 32, a load cell 33, and the load cell 33 is screwed, welded, riveted or connected with the bottom of the platform 32 by a fastener; alternatively, the platform 32 and the load cell 33 are integrated to form the load cell 3.

In an embodiment of the present invention, the force measuring sensors 33 are transverse and longitudinal force measuring devices, or longitudinal force measuring devices. The longitudinal force measuring device is used as a force measuring sensor, and the axle information and the weight information of the vehicle can be obtained; the transverse and longitudinal force measuring devices are used as force measuring sensors, so that whether the wheel axle is a driving shaft or not and the information of the wheel axle can be identified, the weight of the vehicle can be obtained, and a powerful basis is provided for judging whether the vehicle is overrun and overloaded or not.

In an embodiment of the present invention, the force sensors 33 are arranged in an array.

In an embodiment of the present invention, as shown in fig. 9, a signal line 6 is connected to a conductive element inside the load cell 33, the signal line 6 is led out from a side of the load cell 33 and gathered at an outlet 321 located at a bottom end face of the platform 32 through a threading channel 323 inside the platform 32, and the outlet 321 leads out the signal line 6 and connects with the controller 7 after passing through the lead device 4. By adopting the lead wire mode, the signal wire 6 and the external environment are isolated, and the influence on the precision caused by the fact that gas in the external environment enters the force measuring sensor 33 through the signal wire is prevented.

Specifically, the load cell 3 of the present invention may be a combination of a weighing platform 32 and a load cell 33; the platform 32 and the load cell 33 may be assembled together.

In an embodiment of the present invention, as shown in fig. 2-6, the cross section of the platform 32 is "convex", and the two lower end surfaces of the platform 32 are provided with first through holes 31 opposite to the first threaded holes 22; the head of the bolt penetrates through the first through hole 31 to place a plurality of weighing sensors 3 in close proximity side by side or a single weighing sensor 3 into the frame body 2; pressing strips 8 are pressed in a groove formed by the weighing sensor 3 and the side wall of the frame body 2, counter bores 81 opposite to the first through holes 31 are arranged in the length direction of the pressing strips 8 at intervals, the head of a bolt penetrates through the counter bores 81 to press the pressing strips 8 in the groove, and the head of the bolt is in threaded connection with a nut to fix the pressing strips 8, so that the weighing sensor 3 is fixed. By adopting the mode, the weighing sensor 3 can be more stably arranged in the frame body 2, and the pressing strip 8 is used for constraining the weighing sensor 3 to the same horizontal plane, so that the stability of the weighing sensor 3 is facilitated.

In one embodiment of the utility model, the platform surface is provided with dovetail grooves 30, as shown in fig. 4. By adopting the mode, the adhesive layer is prevented from falling off after being subjected to external force for a long time.

In one embodiment of the present invention, as shown in fig. 7-9, the lead assembly 4 includes an assembly front end 41 and an assembly rear end 42; the device front end 41 is placed into the outlet port 321 and the device rear end 42 is threadably engaged with the platform 32. In this way, the lead device 4 can firmly and tightly seal the outlet port 321 and lead out the signal wire 6.

In an embodiment of the present invention, as shown in fig. 7-9, the outer periphery of the front end head 41 of the device is provided with a sealing ring 411, and the rear end 42 of the device comprises an end cover main body 421, a tapered sealing body 422, a sealing joint 423, and a pressing cap 424; a hole is formed in the middle of the front end head 41 of the device and extends to the lower end of the end cover main body to form a second blind hole 410, a first cylindrical hole 4211 communicated with the second blind hole 410, a conical through hole 4212 communicated with the first cylindrical hole 4211 and a second cylindrical hole 4213 communicated with the conical through hole 4212 are sequentially formed in one side wall of the end cover main body 421, and the first cylindrical hole 4211, the conical through hole 4212, the second cylindrical hole 4213 and the second blind hole 410 form an L-shaped passage; a threaded hole is formed in the bottom of the end cover main body 421, and a threaded hole 320 is formed in the weighing platform 32; placing the front end head 41 of the device into the wire outlet port 321 and screwing the end cover main body 421 and the weighing platform 32 through bolts;

the middle of the conical sealing body 422 is provided with a wire hole; the conical sealing body 422 is matched and embedded into the conical through hole 4212;

a seal joint 423, the seal joint front end 4231 is in matching threaded connection with the second cylindrical hole 4213; a clamping groove 42321 is formed in the rear end 4232 of the sealing joint; an air pipe 9 is sleeved in the clamping groove 42321;

the middle of the pressing cap 424 is provided with a through hole for leading out the air pipe 9, the pressing cap 424 is in threaded connection with the sealing joint 423 and clamps one end of the air pipe 9 in the clamping groove 42321 to fix the air pipe 9; the signal wire 6 passes through the L-shaped passage into the air tube 9.

The unique design of the front end head 4231, the end cover main body 421 and the conical sealing body 422 is adopted, so that the signal wire 6 is effectively sealed at one time from the outlet wire of the weighing sensor 3; effective fixed mounting of the air pipe 9 is achieved by designing a clamping groove 42321 of the sealing joint, the signal line 6 is led out from the air pipe 9 and then connected with the controller 7, the air pipe 9 blocks influence of external environment gas liquid on the signal line 6, secondary effective sealing is achieved on the signal line 6, effective sealing of the signal line 6 is achieved, and sealing performance of the whole weighing sensor 3 is better. The lead device 4 has simple structure and good sealing performance, and is completely suitable for sealing the outlet port of the weighing sensor 3 of the truck scale.

In an embodiment of the present invention, as shown in fig. 7, the front end 41 of the device is provided with an annular groove 412 on the periphery, and a sealing ring 411 is arranged in the annular groove 412. In this way, the device front end 41 is better sealed off from the load cell 3 outlet 321.

Specifically, the first cylindrical hole 4211 has a smaller hole diameter than the second cylindrical hole 4213. The sealing joint rear end 4232 comprises: the sealing joint comprises a first round table 42322 connected with a front end 4231 of the sealing joint, a first central column 42323 connected with the first round table 42322, a second round table 42324 connected with the first central column 42323, and a sealing joint tail end 42325 connected with the second round table 42324 and forming a clamping groove 42321, wherein the sealing joint 423 is of an integrally molded structure. The diameter of the second round table 42324 is smaller than that of the first round table 42322, and the diameter of the first round table 42322 is larger than the inner diameter of the second cylindrical hole 4213. By adopting the mode, the installation of the air pipe can be well realized, and the airtightness is good.

While embodiments of the utility model have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the utility model not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.

Claims

1. A flat-panel composite dynamic truck scale layout system, comprising:

2. The flat composite dynamic vehicle scale layout system according to claim 1, wherein the side surface and the bottom surface of the weighing sensor are provided with isolation layers; and the upper surface of the weighing sensor is provided with a wear-resistant layer.

3. The flat panel composite dynamic vehicle scale layout system of claim 2, wherein said isolation layer is made of a material having cushioning, shock and moisture resistance.

4. The flat-plate composite dynamic vehicle scale layout system according to claim 1, wherein the weighing sensor comprises a weighing platform and a load cell, and the load cell is welded or connected with the bottom of the weighing platform through a fastener; or the weighing platform and the force measuring sensor are integrated to form the weighing sensor.

5. The flat panel composite dynamic vehicle scale placement system according to claim 4, wherein said load cells are lateral and longitudinal load cells or longitudinal load cells.

6. The flat panel composite dynamic vehicle scale layout system of claim 4, wherein the force sensors are arranged in an array.

7. The flat plate composite dynamic vehicle scale layout system according to claim 4, wherein the conductive elements inside the load cell are connected with signal wires, the signal wires are led out from the side edges of the load cell and pass through a threading channel in the weighing platform to converge on an outlet port at the bottom end face of the weighing platform, and the outlet port leads out the signal wires and passes through a lead device to be connected with the controller.

8. The flat composite dynamic vehicle scale layout system according to claim 4, wherein the cross section of the weighing platform is of a convex shape, and the two lower end surfaces of the weighing platform are provided with first through holes opposite to the first threaded holes; the head of the bolt penetrates through the first through hole to place the weighing sensors into the frame in a side-by-side close proximity mode; pressing strips are pressed in a groove formed by the weighing sensor and the side wall of the frame body, counter bores opposite to the first through holes are arranged in the length direction of the pressing strips at intervals, the head of the bolt penetrates through the counter bores to press the pressing strips in the groove, and the head of the bolt is in threaded connection with a nut to fix the pressing strips, so that the weighing sensor is fixed.

9. The flat panel composite dynamic vehicle scale layout system of claim 4, wherein the platform surface is provided with dovetail grooves.

10. The flat panel composite dynamic vehicle scale layout system of claim 7, wherein said lead means comprises a device front end and a device rear end; the front end of the device is placed into the wire outlet port, and the rear end of the device is in threaded connection with the weighing platform.

11. The flat composite dynamic vehicle scale layout system according to claim 10, wherein a seal ring is arranged on the periphery of the front end head of the device, and the rear end of the device comprises an end cover main body, a conical seal body, a seal joint and a pressing cap; the middle part of the front end of the device is provided with a hole and extends to the lower end of the end cover main body to form a second blind hole, a first cylindrical hole communicated with the second blind hole, a conical through hole communicated with the first cylindrical hole and a second cylindrical hole communicated with the conical through hole are sequentially arranged on one side wall of the end cover main body, and the first cylindrical hole, the conical through hole, the second cylindrical hole and the second blind hole form an L-shaped passage; the bottom of the end cover main body is provided with a threaded hole, and the weighing platform is provided with a threaded hole; placing the front end head of the device into a wire outlet port and connecting the end cover main body with the weighing platform in a threaded manner through a bolt;

12. The system according to claim 10, wherein the front end of the device has an annular groove around its periphery, and the annular groove has a sealing ring inside.