CN217738079U - Comprehensive checking fixture for size of lower protective pipe - Google Patents

Abstract

The utility model provides a lower pillar size is synthesized and is examined utensil, include: a base, the base being horizontally disposed; the clamp is arranged on the base and used for clamping the steel pipe of the lower protective pipe; the detection seat is arranged on the base and opposite to the clamp, and a profile measuring groove is formed in one side, close to the clamp, of the detection seat and used for placing a disc of the protective pipe; the first detection assembly is arranged on the detection seat, and a plurality of mounting holes are formed in the large circular end of the disc of the lower protection tube. The utility model has novel design and simple operation, and is provided with a clamp for clamping and fixing the lower protective pipe on the base through the arrangement of the clamp and the like, the clamp fixes the whole position of the lower protective pipe, and simultaneously, a clamping area on the clamp can evenly clamp and fix the lower protective pipe, thereby ensuring that the lower protective pipe is not damaged in the detection process; meanwhile, the idler wheels are arranged in the clamping area, so that the lower protective pipe can rotate conveniently, and subsequent detection is facilitated.

Description

Comprehensive checking fixture for size of lower protective pipe

Technical Field

The utility model relates to an examine technical field, especially relate to lower pillar size is synthesized and is examined utensil.

Background

The position degree is a range in which the axis or the central plane of the body allows the position of the body to be changed, that is, the range in which the actual position of the axis or the central plane of the body is allowed to be changed is an index for limiting the amount of change of the actual position of the element to be measured from the ideal position. The positional tolerance is based on the ideal position given on the pattern in order to assess the accuracy of the actual element position. Generally, the positional degree includes a positional degree of a point, a positional degree of a line, and a positional degree of a face.

The main index of the profile tolerance for describing the dimensional accuracy of the curved surface is a profile tolerance error, which refers to the variation of the measured actual profile relative to the ideal profile. With or without a reference.

The circle run-out is the difference between the maximum and minimum readings measured by the fixed position indicator in a given direction during a revolution of the measured actual element without axial movement about the reference axis.

The current lower protective pipe is generally composed of a steel pipe and a disc (generally, the steel pipe is welded on the disc), wherein the disc is provided with a large round end and a small round end which are coaxially arranged, the steel pipe is generally installed at the large round end of the disc, the process needs to ensure that the steel pipe and the large round end are coaxially welded, but the relative position degree of the steel pipe and the large round end of the disc can be changed in the machining process of installing the steel pipe and the large round end of the disc. As shown in fig. 1-2, the lower protection tube 25 is composed of a steel tube 251 and a disc 252, the disc 252 has a mounting hole 253, and the disc 252 has a large circular end 2521 and a small circular end 2522. The existing position degree, profile degree and circle run-out detection method is complex, the number of positions needing to be detected of the welded lower protective pipe is large, the time needed by detection is long, and further the detection efficiency is low; meanwhile, when an object to be detected is clamped by the conventional detection tool, the clamping stress is uneven, the object to be detected is easy to damage, and the use is inconvenient.

SUMMERY OF THE UTILITY MODEL

Based on the technical problem who exists among the background art, the utility model provides a utensil is examined to pillar size synthesis down, include:

a base, the base being horizontally disposed;

the clamp is arranged on the base and used for clamping the steel pipe of the lower protective pipe;

the detection seat is arranged on the base and opposite to the clamp, and a profile measuring groove is formed in one side, close to the clamp, of the detection seat and used for placing a disc of the protective pipe;

the first detection assembly is arranged on the detection seat, a plurality of mounting holes are formed in the large circular end of the disc of the lower protective tube, and the first detection assembly is used for detecting the position degrees of the mounting holes in the large circular end;

second determine module, third determine module, fourth determine module, second determine module, third determine module, fourth determine module all set up on detecting the seat, and the second determine module is used for detecting the profile tolerance of disc big circle end, and the third determine module is used for detecting the outer circumference position degree of disc small circle end, and the fourth determine module is used for detecting the disc big circle end and keeps away from the terminal surface circle of steel pipe and beats.

Preferably, the clamp comprises two fixing blocks, a first clamping block, a second clamping block and a driving piece, the two fixing blocks are oppositely arranged on the base, the first clamping block and the second clamping block are respectively and slidably arranged on the two fixing blocks, a clamping area with adjustable size is formed between the first clamping block and the second clamping block, the clamping area is used for clamping the steel pipe of the lower protective pipe, and the driving piece is used for driving the first clamping block and the second clamping block to be close to or far away from each other.

Preferably, the driving piece comprises a first thrust rod, a first clamping block and a second clamping block are arranged at the outer side of the first clamping block, supporting blocks arranged on the base are arranged at the outer side of the first clamping block, one end of the first thrust rod is connected with the first clamping block, the other end of the first clamping block movably penetrates through the supporting blocks at the outer side of the first clamping block, one end, close to the second clamping block, of the first clamping block is connected with a connecting rod, the connecting rod slides to penetrate through the second clamping block, one end, far away from the first clamping block, of the connecting rod is hinged to a transmission block, the middle position of the transmission block is hinged to the supporting blocks at the outer side of the second clamping block, the top end of the transmission block is hinged to a second thrust rod, and one end, far away from the transmission block, of the second thrust rod is connected with the second clamping block.

Preferably, the clamp further comprises a plurality of rollers, and the rollers are uniformly distributed on one side of the first clamping block and one side of the second clamping block, which are close to each other.

Preferably, the first detection assembly comprises a measurement pin, a plurality of through holes are formed in the detection base, the through holes correspond to the mounting holes one by one and are arranged coaxially with the mounting holes, the measurement pin has a first working state and a second working state, and when the measurement pin is in the first working state, one end of the measurement pin can penetrate through the through holes and the mounting holes in sequence; when the measuring pin is in the second working state, one end of the measuring pin penetrates through the through hole but cannot penetrate through the mounting hole.

Preferably, the number of the mounting holes and the number of the through holes are three, the three mounting holes are arranged at the large round end of the disc, the three through holes are arranged on the detection seat, and the three through holes and the three mounting holes are in one-to-one correspondence and are coaxially arranged.

Preferably, the second detection assembly comprises a go-no go gauge, the profile tolerance measurement groove is circular, a disc of the lower protective tube and the profile tolerance measurement groove are coaxially arranged, an annular gap is reserved between the large circular end of the disc and the profile tolerance measurement groove, the go-no go gauge has a first working state and a second working state, when the go-no go gauge is in the first working state, the go-no go gauge of the go-no go gauge can be inserted into the annular gap and can slide in the annular gap, and the no go gauge of the go-no go gauge cannot be inserted into the annular gap; when the go-no go gauge is in the second working state, the go gauge of the go-no go gauge can not be inserted into the annular gap or the no-go gauge of the go-no go gauge can be inserted into the annular gap.

Preferably, the third detection assembly comprises a first dial indicator and a first probe, the first dial indicator and the first probe are vertically installed on the detection seat from top to bottom, one end of the first probe extends into the profile measuring groove, the first probe can move along the vertical direction, the top end of the first probe is connected with a measuring head of the first dial indicator in a pressing mode, and the bottom end of the first probe is connected with the outer circumference of the small circular end of the disc in a pressing mode.

Preferably, the fourth detection assembly comprises a second dial indicator and a second probe, the middle of the second probe is hinged to the detection seat, one end of the second probe extends into the profile measurement groove, the second dial indicator is mounted on the detection seat, one end of the second probe is connected with the end face, far away from the steel pipe, of the large round end of the disc in a pressing mode, and the other end of the second probe is connected with the measuring head of the second dial indicator in a pressing mode.

Preferably, the driving member further comprises a quick clamp, the quick clamp is movably mounted on the supporting block close to the first clamping block and connected with the first thrust rod, and the quick clamp is used for driving the first thrust rod to move. Certainly, the first thrust rod needs to be driven to move, the arrangement of the quick clamp is not limited, and other components capable of driving the first thrust rod to move can be arranged, so long as the purpose of moving the first thrust rod is achieved.

Compared with the prior art, the utility model provides a lower pillar size is synthesized and is examined utensil adopts above-mentioned technical scheme, has reached following technological effect:

1. through the arrangement of the clamp and the like, the clamp for clamping and fixing the lower protective pipe is arranged on the base, the clamp fixes the whole position of the lower protective pipe, and meanwhile, the clamping area on the clamp can clamp and fix the lower protective pipe uniformly under stress, so that the lower protective pipe is ensured not to be damaged in the detection process; meanwhile, the rollers are arranged in the clamping area, so that the lower protective pipe can rotate conveniently, and the subsequent detection is facilitated;

2. through the setting of first determine module, second determine module etc, whether first determine module (5) are used for detecting the position degree of a plurality of mounting holes on the big circle end and meet the requirements, whether second determine module is used for detecting the profile degree of disc big circle end and meets the requirements, whether third determine module is used for detecting the outer circumference position degree of disc little circle end and meets the requirements, whether fourth determine module is used for detecting the end face beat that the steel pipe was kept away from to disc big circle end and meets the requirements, the staff can unordered go on above four and detect, utilize these four determine modules, it is quick to detect, the operation is thus simple, high durability and convenient use, the very big improvement to the efficiency and the effect that protect the pipe and detect down.

Drawings

FIG. 1 is a first perspective view of the lower protective tube;

FIG. 2 is a second perspective view of the lower protective tube;

fig. 3 is a schematic view of the overall structure of the first viewing angle of the present invention;

fig. 4 is a schematic view of the overall structure of the second viewing angle of the present invention;

fig. 5 is a schematic view of the overall structure of the third viewing angle of the present invention;

fig. 6 is a schematic view of the overall structure of the fourth viewing angle of the present invention;

fig. 7 is a schematic view of the overall structure of the clamp of the present invention;

fig. 8 is a schematic view of the overall structure of the detection seat, the third detection assembly and the fourth detection assembly of the present invention.

In the figure: 1. the device comprises a base, 2, a clamp, 3, a detection seat, 4, a profile measuring groove, 5, a first detection assembly, 6, a second detection assembly, 7, a third detection assembly, 8, a fourth detection assembly, 9, a fixed block, 10, a first clamping block, 11, a second clamping block, 12, a supporting block, 13, a first thrust rod, 14, a second thrust rod, 15, a transmission block, 16, a connecting rod, 17, a roller, 18, a through hole, 19, an annular gap, 20, a first dial indicator, 21, a first probe, 22, a second dial indicator, 23, a second probe, 24, a quick clamp, 25, a lower sliding pipe, 251, a steel pipe, 252, a disc, 2521, a large disc end, 2522, a small disc end and 253 mounting holes.

Detailed Description

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1-2, fig. 1 is a first view overall structure schematic diagram of a lower protection tube; FIG. 2 is a second perspective view of the lower protective tube; the lower protection tube 25 is composed of a steel tube 251 and a disc 252, the disc 252 is provided with a mounting hole 253, and the disc 252 has a large circular end 2521 and a small circular end 2522. Generally, the steel pipe 251 and the disc 252 are connected by welding, meanwhile, the small circular end 2522 and the mounting hole 253 of the disc are formed by processing the disc 252 at a later stage, in the process of the multiple processing procedures, the position degree of the mounting hole 253, the profile degree of the large circular end 2521 of the disc, the position degree of the outer circumference of the small circular end 2522 of the disc and the end face circle jump of the large circular end 2521 of the disc far away from the steel pipe may be changed, the lower protective pipe 25 can be clamped and fixed by using the checking fixture, and multiple detection procedures can be rapidly carried out on the lower protective pipe 25, so that the use is convenient.

Referring to fig. 3-8, the utility model provides a comprehensive checking fixture of pillar size down, include:

the device comprises a base 1, wherein the base 1 is horizontally arranged;

the clamp 2 is arranged on the base 1, and the clamp 2 is used for clamping the steel pipe 251 of the lower protective pipe 25;

the detection base 3 is arranged on the base 1 and opposite to the clamp 2, a profile tolerance measuring groove 4 is formed in one side, close to the clamp 2, of the detection base 3, and when the clamp 2 clamps the steel pipe 251 of the lower protection pipe 25, the disc 252 of the lower protection pipe 25 is placed in the profile tolerance measuring groove 4, and the disc 252 and the profile tolerance measuring groove 4 are coaxially arranged;

the first detection assembly 5 is arranged on the detection seat 3, a plurality of mounting holes 253 are formed in the circular disc big circular end 2521 of the lower protective tube 25, and the first detection assembly 5 is used for detecting whether the position degrees of the plurality of mounting holes 253 on the big circular end 2521 meet the requirements or not;

the second detection assembly 6, the third detection assembly 7, the fourth detection assembly 8, the second detection assembly 6, the third detection assembly 7, the fourth detection assembly 8 all set up on detecting the seat 3, the second detection assembly 6 is used for detecting whether the profile tolerance of disc big round end 2521 meets the requirements, the third detection assembly 7 is used for detecting whether the outer circumference position degree of disc small round end 2522 meets the requirements, the fourth detection assembly 8 is used for detecting whether the end face circle run-out that disc big round end 2521 kept away from steel pipe 251 meets the requirements.

For the fixture 2, the fixture 2 comprises two fixing blocks 9, a first clamping block 10, a second clamping block 11 and a driving piece, the two fixing blocks 9 are oppositely arranged on the base 1, the first clamping block 10 and the second clamping block 11 are respectively and slidably arranged on the two fixing blocks 9, a clamping area with adjustable size is formed between the first clamping block 10 and the second clamping block 11, the clamping area is used for clamping the steel pipe 251 of the lower protective pipe 25, the driving piece is used for driving the first clamping block 10 and the second clamping block 11 to be close to or far away from each other, and when the steel pipe 251 is clamped in the clamping area by driving the first clamping block 10 and the second clamping block 11 to be close to each other through the driving piece.

In order to protect the steel pipe 251 clamped for the purpose of clamping the steel pipe 251, and prevent the steel pipe 251 from being damaged due to uneven stress, the driving part is arranged to comprise a first thrust rod 13, a first clamping block 10, a supporting block 12 arranged on the base 1 is arranged at the position of the outer side of a second clamping block 11, one end of the first thrust rod 13 is connected with the first clamping block 10, the other end of the first thrust rod movably penetrates through the supporting block 12 at the outer side of the first clamping block 10, one end, close to the second clamping block 11, of the first clamping block 10 is connected with a connecting rod 16, the connecting rod 16 slidably penetrates through the second clamping block 10, one end, far away from the first clamping block 10, of the connecting rod 16 is hinged with a transmission block 15, the middle position of the transmission block 15 is hinged to the supporting block 12 at the outer side of the second clamping block 11, the top end of the transmission block 15 is hinged with a second thrust rod 14, and one end, far away from the transmission block 15, of the second thrust rod 14 is connected with the second clamping block 11. The driving piece drives the first clamping block 10 and the second clamping block 11 stably, so that the clamping acting force of the first clamping block 10 and the second clamping block 1 on the steel pipe 251 is uniform. In order to further improve the protection effect on the steel pipe 251, a buffer spring may be sleeved on the connecting rod 16, and the elastic effect of the buffer spring is utilized to make the clamping force applied to the steel pipe 251 more uniform.

In order to ensure that after the first clamping block 10 and the second clamping block 11 clamp the steel pipe 251, the steel pipe 251 can rotate quickly in a clamping area formed by the first clamping block 10 and the second clamping block 11, so that subsequent detection is facilitated, a plurality of rollers 17 are additionally arranged on the clamp 2, and the plurality of rollers 17 are uniformly distributed on one side, close to each other, of the first clamping block 10 and the second clamping block 11. Meanwhile, in order to facilitate the first thrust rod 13 to move quickly, the quick clamp 24 is movably mounted on the first clamping block 10 and connected with the first thrust rod 13, and the quick clamp 24 is used for driving the first thrust rod 13 to move.

Referring to fig. 7, the specific working process is as follows: in the process that the quick clamp 24 drives the first thrust rod 13 to move rightwards, the first thrust rod 13 can drive the first clamping block 10 to move rightwards on the left fixed block 9, the rightwards movement of the first clamping block 10 can drive the connecting rod 16 to move rightwards, the rightwards movement of the connecting rod 16 can drive the transmission block 15 hinged with the connecting rod to rotate, the transmission block 15 can rotate anticlockwise through the center of the circle of the center of the transmission block, namely, the bottom end of the transmission block 15 can rotate rightwards on a track circle formed by the transmission block 15, the top end of the transmission block 15 can move leftwards on the track circle formed by the transmission block 15, the leftwards movement of the top end of the transmission block 15 can drive the second push-pull rod 14 hinged to move leftwards, and the second thrust rod 14 can drive the second clamping block 11 to move leftwards on the right fixed block 9; and then under the drive of the quick clamp 24, the clamping block I10 moves rightwards, the clamping block II 11 moves leftwards, namely, a clamping area formed between the clamping block I10 and the clamping block II 11 is gradually reduced, then the steel pipe 251 of the lower protective pipe 25 is placed in the clamping area, the disc 252 of the lower protective pipe 25 is placed in the profile measuring groove 4, and when the clamping area is gradually reduced to a certain degree, the steel pipe 251 is clamped and fixed, namely, the lower protective pipe 25 is integrally clamped and fixed, so that a subsequent multi-channel detection process is facilitated.

After the clamp 2 integrally clamps and fixes the lower protective tube 25, a worker can perform the following four detection processes on the lower protective tube 25 by using the detection tool:

1. detecting the position of the plurality of mounting holes 253 on the lower protective tube circular end 2521: the first detection assembly 5 comprises a measurement pin, a plurality of through holes 18 are formed in the detection base 3, the through holes 18 and the mounting holes 253 are arranged in a one-to-one correspondence mode, and the through holes 18 and the mounting holes 253 are arranged coaxially. During detection, a worker penetrates one end of the measuring pin through the through hole 18 from the back side of the detection seat 3 (referring to fig. 6, the side with the steel pipe 251 on the lower protective pipe 25 is the front side), and then inserts the end into the mounting hole 253, if the end can be inserted into the mounting hole 253, the position degree of the mounting hole 253 meets the requirement; if one end of the measuring pin penetrates through the through hole 18 but cannot be inserted into the mounting hole 253, the position of the mounting hole 253 is not satisfactory. By sequentially detecting the plurality of mounting holes 253 on the plurality of rounded ends 2521, it is possible to detect whether or not the mounting holes 253 at specific positions match the positional accuracy. Preferably, three mounting holes 253 are formed in the large circular end 2521 of the disc, and correspondingly, the number of the through holes 18 is three, the three mounting holes 253 are circumferentially arranged on the large circular end 2521 of the disc in an array manner, the three through holes 18 are circumferentially arranged on the detection base 3 in an array manner, the three through holes 18 and the three mounting holes 253 are arranged in a one-to-one correspondence manner, and a worker can sequentially detect the three mounting holes 253 by using a single measuring pin.

2. Detecting the profile of the big round end 2521 of the disc: the second detection assembly 6 comprises a go-no go gauge, the profile measuring groove 4 is circular, the disc 252 of the lower protective tube is coaxially arranged with the profile measuring groove 4, and an annular gap 19 is reserved between the large circular end 2521 of the disc and the profile measuring groove 4. During detection, a worker firstly inserts the go gauge of the go-no go gauge into the annular gap 19, referring to fig. 6, three mounting holes 253 divide the annular gap 19 into three arc-shaped areas, if the go gauge can be inserted into one of the arc-shaped areas (located at an upper position), then the go gauge slides in the arc-shaped area, after the go gauge is pulled out, the go gauge of the go-no go gauge is inserted into the annular gap 19, and if the no gauge cannot be inserted into the annular gap, the arc-shaped area meets the requirement; then, the worker can rotate the steel pipe 251 to rotate the other arc-shaped area to the upper position, then the operations are repeated, the operation is carried out in a reciprocating mode in sequence, the go-no go gauge is inserted into the other two annular areas and slides, whether the annular areas are qualified or not is detected, if the go-no go gauge of the go-no go gauge can be inserted into the three annular areas in sequence and the no-go gauge of the go-no go gauge cannot be inserted into the three annular areas, it is indicated that the profile tolerance of the large circular end 2521 of the disc meets the requirements; on the contrary, if the number of the annular regions into which the go gauge of the go-no-go gauge can be inserted is less than three, or the number of the ring-shaped regions into which the no-go gauge can be inserted is more than one, it indicates that the profile tolerance of the large round end 2521 of the disc is not satisfactory.

Generally, the annular area provided with the annular gap 19 has an annular width of 10mm, the diameter of the go gauge of the go-no gauge is 9.75mm, the diameter of the no-go gauge of the go-no gauge is 10.25mm, that is, the go gauge with the diameter of 9.75mm can be inserted into the annular area with the annular width of 10mm and can slide therein, and the no-go gauge with the diameter of 10.25mm cannot be inserted into the annular area with the annular width of 10mm, which means that the profile of the large round end 2521 of the disc meets the requirement, otherwise, the profile does not meet the requirement.

3. Detecting the position degree of the outer circumference of the small circular end 2522 of the disc: the third detection assembly 7 comprises a first dial indicator 20 and a first probe 21, wherein the first dial indicator 20 and the first probe 21 are vertically installed on the detection seat 3 from top to bottom, one end of the first probe 21 extends into the profile measuring groove 4, the first probe 21 can move along the vertical direction, the top end of the first probe 21 is connected with a measuring head of the first dial indicator 20 in a pressing mode, and the bottom end of the first probe 21 is connected with the outer circumference of a small circular end 2522 of the disc in a pressing mode. During detection, a worker rotates the steel pipe 251, so that the disc 252 rotates in the profile tolerance measuring groove 3, the bottom end of the probe I21 is always in abutting connection with the outer circumference of the small circular end 2522 of the disc, and if the pointer of the dial indicator I20 has no swing amplitude or has small swing amplitude in the process that the steel pipe 251 drives the disc 252 to rotate, the position tolerance of the outer circumference of the small circular end 2522 of the disc meets the requirement; if the pointer of the first dial indicator 20 swings a large amplitude in the process that the steel pipe 251 drives the disc 252 to rotate, it indicates that the position degree of the outer circumference of the small circular end 2522 of the disc is not satisfactory, that is, in the process that the disc 252 rotates, the outer circumference of the small circular end 2522 of the disc drives the probe one 21 to move up and down with a large amplitude, and since the top end of the probe one 21 is connected with the measuring head of the first dial indicator 20 in a pressing manner, the action of the probe one 21 is visually represented through the pointer swing amplitude of the first dial indicator 20.

4. Detecting the circular runout of the end face of the circular disc big circular end 2521 far away from the steel pipe 251: the fourth detection component 8 comprises a second dial indicator 22 and a second probe 23, the middle position of the second probe 23 is hinged to the detection seat 3, one end of the second probe 23 extends into the profile tolerance measurement groove 4, the second dial indicator 22 is mounted on the detection seat 3, one end of the second probe 23 is connected with the end face, away from the steel pipe 251, of the large round end 2521 of the disc in a pressing mode, and the other end of the second probe 23 is connected with the measuring head of the second dial indicator 22 in a pressing mode. Referring to fig. 3, the second probe 23 can horizontally rotate, when in detection, a worker rotates the steel pipe 251, the rotation of the steel pipe 251 drives the disc 252 to rotate, and further the large circular end 2521 of the disc is far away from the end face of the steel pipe 251 to rotate, if the pointer of the second dial indicator 22 does not swing or swings in a smaller range in the process of rotating the large circular end 2521 of the disc far away from the end face of the steel pipe, it is indicated that the circular runout of the end face of the large circular end 2521 of the disc far away from the steel pipe 251 meets the requirement; if the swing amplitude of the pointer of the second dial indicator 22 is larger in the rotation process of the end face of the large round end 2521 of the disc far away from the steel pipe 251, it is indicated that the end face circle runout of the large round end 2521 of the disc far away from the steel pipe 251 is not satisfactory, that is, in the rotation process of the disc 252, the end face drives the probe two 23 to rotate with a larger amplitude, that is, the probe two 23 rotates around the middle hinged position thereof, the probe two 23 and the end face are pressed against each other with a larger rotation amplitude, and then the probe two 22 is transmitted to the measuring head of the second dial indicator 22, and the swing amplitude of the pointer of the second dial indicator 22 corresponds to the rotation amplitude thereof, so that the rotation amplitude of the probe two 23 is visually indicated.

It should be noted that there is no requirement for a certain detection order for the above four detections of the lower protection tube 25, and the staff may perform the detection according to actual situations.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (10)

1. Utensil is examined in synthesis of protective tube size down, its characterized in that includes:

a base (1), the base (1) being arranged horizontally;

the clamp (2) is arranged on the base (1), and the clamp (2) is used for clamping the steel pipe of the lower protective pipe;

the detection base (3) is arranged on the base (1) and opposite to the clamp (2), a profile measuring groove (4) is formed in one side, close to the clamp (2), of the detection base (3), and the profile measuring groove (4) is used for placing a disc of the lower protective pipe;

the first detection assembly (5) is arranged on the detection seat (3), a plurality of mounting holes are formed in the large circular end of the disc of the lower protection pipe, and the first detection assembly (5) is used for detecting the position degrees of the mounting holes in the large circular end;

second determine module (6), third determine module (7), fourth determine module (8), second determine module (6), third determine module (7), fourth determine module (8) all set up on detecting seat (3), and second determine module (6) are used for detecting the profile tolerance of disc big circle end, and third determine module (7) are used for detecting the outer circumference position degree of disc small circle end, and fourth determine module (8) are used for detecting the disc big circle end and keep away from the terminal surface circle of steel pipe and beat.

2. The comprehensive lower protective pipe dimension testing fixture according to claim 1, wherein the fixture (2) comprises two fixing blocks (9), a first clamping block (10), a second clamping block (11) and a driving element, the two fixing blocks (9) are oppositely mounted on the base (1), the first clamping block (10) and the second clamping block (11) are respectively slidably mounted on the two fixing blocks (9), a clamping area with adjustable size is formed between the first clamping block (10) and the second clamping block (11), the clamping area is used for clamping a steel pipe of the lower protective pipe, and the driving element is used for driving the first clamping block (10) and the second clamping block (11) to approach or separate from each other.

3. The comprehensive lower protective pipe size testing fixture according to claim 2, wherein the driving piece comprises a first thrust rod (13), supporting blocks (12) installed on the base (1) are arranged at the outer sides of the first clamping block (10) and the second clamping block (11), one end of the first thrust rod (13) is connected with the first clamping block (10), the other end of the first thrust rod movably penetrates through the supporting blocks (12) at the outer sides of the first clamping block (10), one end, close to the second clamping block (11), of the first clamping block (10) is connected with a connecting rod (16), the connecting rod (16) slidably penetrates through the second clamping block (11), one end, far away from the first clamping block (10), of the connecting rod (16) is hinged with a transmission block (15), the middle of the transmission block (15) is hinged on the supporting blocks (12) at the outer sides of the second clamping block (11), a second thrust rod (14) is hinged to the top end of the transmission block (15), and one end, far away from the transmission block (15), of the second thrust rod (14) is connected with the second clamping block (11).

4. The comprehensive lower protective tube size testing fixture according to claim 3, characterized in that the fixture (2) further comprises a plurality of rollers (17), and the plurality of rollers (17) are uniformly distributed on one side of the first clamping block (10) and the second clamping block (11) which are close to each other.

5. The comprehensive lower protective pipe size testing fixture according to claim 4, wherein the first detection assembly (5) comprises a measurement pin, a plurality of through holes (18) are formed in the detection base (3), the through holes (18) correspond to the mounting holes one by one and are coaxially arranged with the mounting holes, the measurement pin has a first working state and a second working state, and when the measurement pin is in the first working state, one end of the measurement pin can sequentially penetrate through the through holes (18) and the mounting holes; when the measuring pin is in the second working state, one end of the measuring pin penetrates through the through hole (18) but cannot penetrate through the mounting hole.

6. The comprehensive lower protective tube size testing fixture according to claim 5, wherein the number of the mounting holes and the number of the through holes (18) are three, the three mounting holes are arranged at the large round end of the disc, the three through holes (18) are arranged on the testing base (3), and the three through holes (18) and the three mounting holes are in one-to-one correspondence and are coaxially arranged.

7. The comprehensive lower protective pipe size gauge according to claim 5 or 6, wherein the second detection assembly (6) comprises a go-no-go gauge, the profile measurement groove (4) is circular, a disc of the lower protective pipe and the profile measurement groove (4) are coaxially arranged, an annular gap (19) is reserved between the large circular end of the disc and the profile measurement groove (4), the go-no-go gauge has a first working state and a second working state, when the go-no-go gauge is in the first working state, the go-no-go gauge can be inserted into the annular gap (19) and can slide in the annular gap (19), and the no-go gauge of the go-no-go gauge cannot be inserted into the annular gap (19); when the go-no go gauge is in the second working state, the go gauge of the go-no go gauge can not be inserted into the annular gap (19) or the no-go gauge of the go-no go gauge can be inserted into the annular gap (19).

8. The comprehensive lower protective pipe size testing fixture as claimed in claim 7, wherein the third detection assembly (7) comprises a first dial indicator (20) and a first probe (21), the first dial indicator (20) and the first probe (21) are vertically mounted on the detection base (3) from top to bottom, one end of the first probe (21) extends into the profile measuring groove (4), the first probe (21) can move in the vertical direction, the top end of the first probe (21) is connected with a measuring head of the first dial indicator (20) in a pressing manner, and the bottom end of the first probe (21) is connected with the outer circumference of the small round end of the disc in a pressing manner.

9. The comprehensive lower protective pipe size testing fixture according to claim 8, wherein the fourth detection assembly (8) comprises a second dial indicator (22) and a second probe (23), the middle of the second probe (23) is hinged to the detection seat (3) and one end of the second probe extends into the profile measuring groove (4), the second dial indicator (22) is mounted on the detection seat (3), one end of the second probe (23) is connected with the end face, away from the steel pipe, of the large circular end of the disc in a pressing mode, and the other end of the second probe (23) is connected with the measuring head of the second dial indicator (22) in a pressing mode.

10. The comprehensive lower protective pipe size testing fixture according to claim 8 or 9, wherein the driving member further comprises a quick clamp (24), the quick clamp (24) is movably mounted on the support block (12) close to the first clamping block (10) and connected with the first thrust rod (13), and the quick clamp (24) is used for driving the first thrust rod (13) to move.

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