CN209745273U - Four-wheel inclinometer for preventing guide wheel from derailing - Google Patents

Abstract

The utility model discloses a prevent four-wheel inclinometer of guide pulley derailment belongs to geotechnical engineering monitoring instrument field. In the four-wheel inclinometer, one end of a guide wheel bracket is pivoted on a fixed shaft at the end part of a probe rod, and the other end of the guide wheel bracket is pivoted with a guide wheel; one side of the guide wheel bracket facing the axis of the probe rod is taken as the inner side, a middle spring ring and one elastic arm of the torsion spring are fixed in the corresponding guide wheel accommodating groove, and the other elastic arm is fixed at the inner side of the guide wheel bracket; the guide wheel bracket limiting pieces are fixed in the corresponding guide wheel accommodating grooves and are positioned outside the guide wheel bracket; when the guide wheel bracket naturally expands under the action of the elasticity of the torsion spring, the guide wheel bracket is blocked by the guide wheel bracket limiting part, so that the outward-opening angle is fixed under the dual actions of the elasticity of the torsion spring and the blocking of the guide wheel bracket limiting part. The utility model discloses a structure and overall arrangement to the guide pulley subassembly improve, utilize the elasticity of torsional spring to make every guide bracket's opening angle can independently follow the deformation of guide rail and the self-adaptation changes, solve the technical problem that prior art easily derails, blocks from this.

Description

Four-wheel inclinometer for preventing guide wheel from derailing

Technical Field

The utility model belongs to geotechnical engineering monitoring instrument field, more specifically relates to a prevent four-wheel inclinometer of guide pulley derailment.

Background

because soil body structures are complex and various, geotechnical engineering is usually developed by means of field monitoring and checking calculation theory, and engineering safety evaluation is carried out. The most commonly used instrument in field monitoring belongs to a sliding inclinometer, and comprises an inclinometer pipe, a probe rod, a lead, a guide rail and a guide wheel. The probe rod of the inclinometer takes an inclinometer pipe guide rail as a direction reference, and constantly senses the change of an inclination angle in the pipe in the advancing process, so that the horizontal displacement change and the section settlement change in the soil body are precisely measured. However, the traditional sliding inclinometer is a double-wheel set probe rod, and a steel wire rope is adopted for traction in the process of measuring section settlement, the traction force of the steel wire rope points to the edge of the pipe orifice at the inner side of the inclinometer pipe in an inclined mode, so that a guide wheel is easy to separate from a track in use. As the guide rail is the direction reference of the probe rod, the precision of a measuring result is directly influenced once the guide wheel is derailed, data abnormity is caused, and even the probe rod is clamped in the inclinometer tube to cause the failure of a measuring point position.

The working principle of the sliding inclinometer is that relative displacement is obtained according to the inclination angle measured by a sensor and the distance between guide wheels (measuring point distance), and displacement change at each measuring point is obtained through accumulation calculation, the sensor is positioned in the middle of a probe rod, and the length of the center point of two groups of guide wheels is the distance between the measuring points. The existing inclinometer guide wheels mostly adopt two sets of linear type double wheel sets, the two sets of double wheel guide wheels are arranged in the same plane, the bending resistance is small, the guide wheels are easy to derail, two guide wheels in the set share the same rotating shaft and the V-shaped elastic sheet, the length of the part of the feeler lever except a sensor is larger, the length of the feeler lever is longer (generally 0.7m), the portability of the feeler lever is not only influenced, and in the engineering measurement with severe field conditions, because the difference displacement at different depths is larger, a large-corner curve can be generated in the inclinometer lever, at the moment, the feeler lever is overlong and is easy to block at the curve, the measurement is hindered, and the adaptability of the inclinometer is reduced.

SUMMERY OF THE UTILITY MODEL

To the above defect or the improvement demand of prior art, the utility model provides a prevent four-wheel inclinometer of guide pulley derailment, its aim at improves through the structure and the overall arrangement to the guide pulley subassembly, utilizes the elasticity of torsional spring to make every guide bracket's opening angle can independently follow the deformation of guide rail and the self-adaptation changes, solves the technical problem that prior art easily derails, blocks and pause from this.

In order to achieve the above object, according to an aspect of the present invention, there is provided a four-wheel inclinometer for preventing a guide pulley from derailing, including: the probe rod assembly and the two groups of four-wheel guide wheel sets;

The probe rod subassembly includes: the probe rod, the guide wheel accommodating groove and the fixing shaft; the two ends of the probe rod are respectively provided with four guide wheel accommodating grooves which are distributed along the circumferential direction of the probe rod at intervals of 90 degrees;

Each group of four-wheel guide wheel groups comprises four guide wheel components which are arranged in the guide wheel accommodating grooves at the two ends of the probe rod in a one-to-one correspondence manner; the four guide wheel assemblies are uniformly arranged at intervals of 90 degrees along the circumferential direction of the inclinometer probe rod;

Each guide wheel assembly comprises: the guide wheel, the guide wheel bracket limiting piece and the torsion spring are arranged on the guide wheel; one end of the guide wheel bracket is pivoted on the fixed shaft, and the other end of the guide wheel bracket is pivoted with the guide wheel; one side of the guide wheel bracket facing the axis of the probe rod is taken as the inner side, a middle spring ring and one elastic arm of the torsion spring are fixed in the corresponding guide wheel accommodating groove, and the other elastic arm is fixed at the inner side of the guide wheel bracket; the guide wheel bracket limiting pieces are fixed in the corresponding guide wheel accommodating grooves and are positioned outside the guide wheel bracket; when the guide wheel bracket naturally expands under the action of the elasticity of the torsion spring, the guide wheel bracket is blocked by the guide wheel bracket limiting part, so that the outward-opening angle is fixed under the dual actions of the elasticity of the torsion spring and the blocking of the guide wheel bracket limiting part.

further, the plane of each guide wheel intersects with the axis of the probe rod.

Further, the head end of the probe rod is provided with a bottom cushion pad.

Furthermore, an angle sensor is arranged inside the probe rod, and a lead of the angle sensor is led out from the tail of the probe rod and is fixed with the tail of the probe rod in a sealing mode.

Further, idler bracket stop limits the flare angle of the idler bracket to no more than 45 degrees.

Furthermore, one support arm of the torsion spring is abutted against the inner side wall of the guide wheel accommodating groove, and the other support arm is abutted against the inner side of the guide wheel support.

Furthermore, the fixed shaft is annular, and the axis of the fixed shaft is superposed with the axis of the probe rod; the four guide wheel brackets corresponding to the fixed shaft are pivoted on four quadrant points of the fixed shaft, and the non-pivoting part of the fixed shaft is fixedly connected with the end part of the probe rod.

Generally, compared with the prior art, the above technical solution contemplated by the present invention can obtain the following beneficial effects:

(1) The inclinometer of the utility model adopts the four-wheel guide wheel group, so that the inclinometer can fully utilize four guide rails in the inclinometer pipe, thereby realizing the purpose of adding extra support on the basis of the existing double-wheel group technology; the inclinometer of the utility model can deflect the feeler lever only when more than three guide wheels in one guide wheel group derail simultaneously, but according to the structure of the utility model, the guide wheel bracket can change the opening angle along with the deformation self-adaptation of the guide rail due to the elastic action of the torsional spring, thereby the guide wheel can be always attached to the guide rail; therefore, according to the utility model discloses a structure, the probability that the guide pulley more than three derails simultaneously is very low to greatly reduced the probe rod possibility of derailing in the deviational survey pipe.

(2) because the utility model discloses a inclinometer greatly reduced the derailment possibility, can reduce the operation degree of difficulty when measuring like this, improve measured data's accuracy, also avoided causing instrument loss and point position inefficacy because probe rod derailment card is dead.

(3) meanwhile, through the inner oblique arrangement of the four-wheel guide wheel set and the mechanism design of independent movement, the whole length of the feeler lever can be greatly shortened, the portability and the applicability of the inclinometer are improved, and the blocking phenomenon at the bend is reduced.

Drawings

Fig. 1 is a schematic overall structure diagram of the preferred embodiment of the present invention;

Fig. 2 is a schematic structural view of a guide wheel assembly according to a preferred embodiment of the present invention;

Fig. 3 is an axial view of the preferred embodiment of the present invention in the rail.

The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:

1-probe rod, 2-guide wheel, 3-guide wheel bracket, 4-guide wheel bracket limiting piece, 5-torsion spring, 6-fixed shaft, 7-guide wheel accommodating groove, 8-lead, 9-bottom buffer cushion, 10-inclinometer pipe, 11-inclinometer pipe guide rail, 21-first rivet, 22-second rivet and 23-bearing.

Detailed Description

in order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

According to fig. 1, the utility model provides a four-wheel inclinometer of anticreep rail, including probe rod subassembly and two sets of four-wheel guide wheelset, wherein: the probe rod subassembly includes: the device comprises a probe rod 1, a guide wheel accommodating groove 7 and a fixed shaft 6; the two ends of the probe rod 1 are respectively provided with four guide wheel accommodating grooves 7 which are distributed along the circumferential direction of the probe rod at intervals of 90 degrees; each group of four-wheel guide wheel groups comprises four guide wheel components which are correspondingly arranged in the guide wheel accommodating grooves 7 at the two ends of the probe rod 1 one by one; the four guide wheel assemblies are uniformly arranged at 90-degree intervals along the circumferential direction of the inclinometer probe rod.

The head end part and the tail end part of the probe rod 1 of the inclinometer are respectively provided with a group of four wheel guide wheel sets, and each group of four wheel guide wheel sets comprises four guide wheels 2, four guide wheel brackets 3, four guide wheel bracket limiting parts 4, four torsion springs 5, a probe rod end fixing shaft 6 and four guide wheel accommodating grooves 7 arranged on the probe rod. The planes of the four guide wheels 2 are intersected along the axis of the probe rod 1, the adjacent guide wheels 2 form ninety degrees with each other, the extending end part of the guide wheel bracket 3 is pivoted with the guide wheels 2, the root part of the guide wheel bracket 3 is provided with an opening and is sleeved on a fixed shaft 6 at the end part of the probe rod to form a pivoting point which can rotate in the plane. The inboard of idler pulley bracket 3 sets up a torsional spring 5, and its both ends support respectively on idler pulley bracket 3 and guide pulley accomodate groove 7 bottoms, provide external tension for idler pulley bracket 3, thereby torsional spring 5 can be compressed under the exogenic action and make the guide pulley adduction. The guide wheel bracket 3 is close to the outside of root and sets up guide wheel bracket locating part 4, and guide wheel bracket locating part 4 is a cylinder, and the material is the same with the pole body of probe rod 1, welds on the lateral wall of adduction guide wheel receiving groove 7, and the restriction guide wheel bracket angle of flare does not exceed 45 degrees.

the head end of the probe rod 1 is provided with a bottom buffer cushion 9 which is made of high-elasticity rubber with good durability, such as neoprene and nitrile rubber. The tail of the probe rod 1 is connected with a lead 8, the periphery of the probe rod is sealed and waterproof by rubber, the lead 8 passes through a four-wheel guide wheel set through a channel in the center of the probe rod and is connected with a sensor assembly (not shown) in the middle of the probe rod, the sensor assembly is used for detecting the opening angle of the guide wheel bracket 3 and the inclination angle of the probe rod 1, and the total length of the probe rod 1 is 0.5 m.

As shown in fig. 2, the fixed shaft 6 is a circular ring structure, the material of the fixed shaft is the same as that of the probe rod 1, four quadrant points of the fixed shaft are respectively pivoted with four guide wheel brackets 3, and other areas except for four sections of pivoted parts are all firmly welded on the probe rod, so that the stability and durability of the guide wheel brackets are ensured; the torsion spring 5 is a strong spring, so that the transverse length of the spring is reduced under the condition of ensuring the elastic force, the spring can be placed into the guide wheel accommodating groove 7, the longitudinal direction and one end of the torsion spring 5 are respectively fixed on the first rivet 21 and the second rivet 22 to keep stable, and the other end of the torsion spring is pressed against the guide wheel bracket 3. Both ends of the first rivet 21 and the second rivet 22 are welded to the side wall of the guide wheel accommodating groove 7, and after the torsion spring is assembled with the first rivet 21 and the second rivet 22, the first rivet 21 and the second rivet 22 are welded to the preset positions on the side wall of the guide wheel accommodating groove 7.

In other embodiments (not shown), stationary shaft 6 may be a different material than probe 1, so long as it supports idler yoke 3 for rotation. The fixed shaft 6 can also be clamped with the probe rod 1 or directly solidified by sealant. The first rivet 21 and the second rivet 22 may also be disposed in the guide wheel receiving groove 7 in the form of a spring pin, thereby facilitating the disassembly and replacement of the torsion spring 5.

According to fig. 3, the working principle of the inclinometer of the utility model is as follows: in a natural state, the guide wheel 2 keeps an outward-extending angle of 45 degrees under the limitation of the external tension of the torsion spring 5 and the guide wheel bracket limiting piece 4, and during operation, the guide wheel bracket 3 is pressed to enable the guide wheel 2 to be retracted and slide into a corresponding inclinometer tube guide rail 11 in the inclinometer tube 10. In the measuring process, the inclinometer 10 can deform along with the soil body, the guide rail 11 of the inclinometer is not straight any more, and in addition, the traction force is not consistent with the advancing direction of the probe rod 1 but has a certain deflection angle when a plurality of traction forces exist, so that the guide wheel 2 of the inclinometer is easy to be pressed, retracted and steered. In fig. 3, idler 2 is mounted to the head end of idler frame 3 by bearings 23.

The utility model discloses an among the inclinometer, when one to two guide pulley 2 pressurized in: on one hand, due to the supporting effect of the torsion spring 5, the guide wheel 2 can still be attached to the inclinometer tube guide rail 11 as much as possible when being retracted; on the other hand, even if one or two guide wheels 2 are derailed after being retracted, the deflection of the probe rod 1 can be still limited because other guide wheels 2 are still in the track, and the guide wheels 2 retracted under pressure do not have the chance to turn, and can be reset under the elastic force of the torsion spring 5 and enter the inclinometer guide rail 11 again after passing through an obstacle.

Because the motion of each guide wheel bracket 3 is independent, under the supporting action of the respective corresponding torsion springs 5, the probability that the more than three guide wheels 2 are derailed simultaneously is greatly reduced, so that the possibility that the subsequent guide wheels 2 cannot reset (namely cannot enter the corresponding inclinometer tube guide rails 11 again) due to deflection of the feeler lever 1 is greatly reduced, and the working stability and reliability of the inclinometer are further improved.

It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims (7)

1. A four-wheel inclinometer for preventing a guide wheel from derailing, comprising: the probe rod assembly and the two groups of four-wheel guide wheel sets;

The probe rod subassembly includes: the probe rod (1), the guide wheel accommodating groove (7) and the fixed shaft (6); two ends of the probe rod (1) are respectively provided with four guide wheel accommodating grooves (7) which are distributed along the circumferential direction of the probe rod at intervals of 90 degrees;

each group of four-wheel guide wheel groups comprises four guide wheel components which are arranged in the guide wheel accommodating grooves (7) at the two ends of the probe rod (1) in a one-to-one correspondence manner; the four guide wheel assemblies are uniformly arranged at intervals of 90 degrees along the circumferential direction of the inclinometer probe rod;

Each guide wheel assembly comprises: the guide wheel (2), the guide wheel bracket (3), the guide wheel bracket limiting piece (4) and the torsion spring (5); one end of the guide wheel bracket (3) is pivoted on the fixed shaft (6), and the other end is pivoted with the guide wheel (2); one side of the guide wheel bracket (3) facing the axis of the probe rod (1) is taken as the inner side, a middle spring ring and one elastic arm of the torsion spring (5) are fixed in the corresponding guide wheel accommodating groove (7), and the other elastic arm is fixed on the inner side of the guide wheel bracket (3); the guide wheel bracket limiting pieces (4) are fixed in the corresponding guide wheel accommodating grooves (7) and are positioned on the outer side of the guide wheel bracket (3); when the guide wheel bracket (3) naturally expands under the action of the elasticity of the torsion spring (5), the guide wheel bracket is blocked by the guide wheel bracket limiting part (4), so that the outward-opening angle is fixed under the dual actions of the elasticity of the torsion spring (5) and the blocking of the guide wheel bracket limiting part (4).

2. A four-wheel inclinometer preventing guide wheel derailment as defined in claim 1, wherein the plane of each guide wheel (2) intersects the axis of the probe rod (1).

3. A four-wheel inclinometer preventing guide wheel derailment as defined in claim 1, wherein the head end of the probe rod (1) is provided with a bottom cushion pad (9).

4. A four-wheel inclinometer preventing guide wheel derailment as defined in claim 1 or 3, wherein the probe rod (1) is internally provided with an angle sensor, and the lead of the angle sensor is led out from the tail part of the probe rod (1) and is fixed with the tail part of the probe rod (1) in a sealing way.

5. The wheel inclinometer for preventing the guide wheel from derailing according to claim 1, wherein the guide wheel bracket limiting piece (4) limits the angle of extension of the guide wheel bracket (3) to not more than 45 degrees.

6. A four-wheel inclinometer preventing guide wheel derailment according to claim 1, wherein one arm of the torsion spring (5) abuts on the inner side wall of the guide wheel receiving groove (7), and the other arm abuts on the inner side of the guide wheel bracket (3).

7. a four-wheel inclinometer preventing guide wheel derailment as defined in claim 1, wherein the fixed shaft (6) is annular, the axis of which coincides with the axis of the probe rod (1); four guide wheel brackets (3) corresponding to the fixed shaft (6) are pivoted on four quadrant points of the fixed shaft (6), and the non-pivoting part of the fixed shaft (6) is fixedly connected with the end part of the probe rod (1).