Corrugated pipe rigidity and height detection device

Abstract

The utility model discloses a corrugated pipe rigidity and height detection device which comprises a bottom plate, a vertical plate is installed above the bottom plate, two parallel sliding block guide rails are installed on the side face of the vertical plate, a weight bracket is connected to sliding blocks of the sliding block guide rails, and a lifting driving module is further installed on the side face of the vertical plate. The output end of the lifting driving module is connected with a weight bracket, a weight assembly is placed on the weight bracket, a gauge stand is further installed above the bottom plate, a digital display dial indicator is installed on the gauge stand, the upper end of a measuring shaft of the digital display dial indicator is connected with the weight assembly, and a testing base located at the lower end of the measuring shaft of the digital display dial indicator is further installed above the bottom plate. According to the utility model, automatic detection is realized, the accuracy of the detection result is ensured, the height and rigidity of the corrugated pipe can be detected at the same time, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bellows performance detection, and in particular relates to a bellows stiffness and height detection device. Background Art

[0002] As a key component used in instruments and sensors, metal bellows need to be inspected for external dimensions and product performance before leaving the factory. The effective height of the bellows corresponds to the customer's installation requirements, and the stiffness of the bellows corresponds to the customer's performance requirements. These two indicators have a small range and high requirements, and they must be fully inspected.

[0003] In the past, the practice was to use a height percentage indicator to detect the effective height of the bellows, and a stiffness percentage indicator to detect the stiffness. When testing both items, employees were required to lift the heads of the height percentage indicator and the stiffness percentage indicator, place the bellows in the specified position, read the value of the percentage indicator, and determine whether the height of the bellows was qualified; when testing the stiffness, it was also necessary to place another weight, read the deviation value of the percentage indicator, and determine whether the stiffness was qualified.

[0004] This method is labor-intensive and human judgment is prone to misjudgment, resulting in defective products flowing into the market, causing unnecessary losses and impacts. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a bellows stiffness and height detection device, which has the characteristics of high precision, convenient operation and automatic detection of stiffness and height.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bellows stiffness and height detection device, comprising a base plate, a vertical plate installed above the base plate, two parallel slider guides installed on the side of the vertical plate, a weight bracket connected to the slider of the slider guide, a lifting drive module also installed on the side of the vertical plate, the output end of the lifting drive module is connected to the weight bracket, a weight assembly is placed on the weight bracket, a table frame is also installed above the base plate, a digital micrometer is installed on the table frame, the upper end of the measuring axis of the digital micrometer is connected to the weight assembly, a test base located at the lower end of the measuring axis of the digital micrometer is also installed above the base plate, an electric control box is provided on one side of the base plate, a PLC controller is installed inside the electric control box, and the digital micrometer and the lifting drive module are respectively connected to the PLC controller signal.

[0007] In order to display the test results after each test is completed, provide clear processing suggestions for the staff, ensure the accuracy of the test results, and improve work efficiency, a human-machine interaction screen is installed on the front surface of the electric control box, and the human-machine interaction screen is connected to the PLC controller signal.

[0008] In order to perform two-stage compression on the bellows and obtain two height compression values ​​of the bellows, thereby calculating the stiffness and height of the bellows, further, the weight assembly includes a pre-stressing weight and a loading weight, wherein the bottom of the pre-stressing weight is connected with a connecting screw, and the loading weight is arranged above the pre-stressing weight.

[0009] In order to guide the loading weight and the preloading weight, further, a guide cone is provided above the preloading weight, and a guide cone groove corresponding to the guide cone is provided at the bottom of the loading weight.

[0010] In order to ensure that the loading weight does not interfere with the pre-stress weight when the pre-stress weight fully acts on the bellows, further, a support block is connected to the weight bracket, a placement groove for accommodating the pre-stress weight is provided inside the support block, and a positioning groove is provided above the placement groove.

[0011] In order to drive the weight bracket to rise and fall, thereby driving the preload weight and the loading weight to rise and fall, the lifting drive module further includes a servo motor, a lead screw is connected to the output end of the servo motor, a lead screw nut is engaged on the lead screw, and the lead screw nut is connected to the weight bracket.

[0012] In order to position the bellows to be tested, a positioning column is further connected to the middle position above the test base.

[0013] In order to facilitate the exhaust of air when testing the bellows and ensure the accuracy of stiffness and height testing, further, an exhaust hole is provided on the side of the test base, and the exhaust hole is connected to the top surface of the positioning column.

[0014] In order to improve the detection efficiency, further, two digital micrometers, two weight assemblies and two test bases are provided.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model realizes automatic detection, ensures the accuracy of the detection results, and can detect the height and rigidity of the bellows at the same time, thus improving the detection efficiency;

[0017] 2. A human-machine interactive screen is installed on the front surface of the electric control box of the utility model, which displays the test results after each test is completed, provides clear processing suggestions for the staff, ensures the accuracy of the test results, and improves work efficiency;

[0018] 3. The utility model compresses the bellows in two stages by using pre-compression weights and loading weights to obtain two height compression values ​​of the bellows, thereby calculating the stiffness and height of the bellows;

[0019] 4. The utility model has an exhaust hole on the side of the test base, which is connected to the top surface of the positioning column, so as to facilitate the exhaust of air when testing the bellows and ensure the accuracy of stiffness and height testing;

[0020] 5. For the detection of different types of bellows, the utility model only needs to replace the test base of the corresponding type, and has good versatility;

[0021] 6. The utility model is provided with two digital display micrometers, weight components and test bases, and is equipped with two testing stations, thereby improving the testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the weight assembly of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the pre-loaded weight of the utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the loading weight of the utility model;

[0027] Figure 5 This is a schematic cross-sectional view of the weight bracket of the utility model;

[0028] Figure 6 This is a structural schematic diagram of the lifting drive module of the utility model;

[0029] Figure 7 It is a structural schematic diagram of the test base of the utility model;

[0030] Figure 8 It is a cross-sectional structural schematic diagram of the test base of the utility model;

[0031] In the figure: 1, base plate; 2, digital micrometer; 3, weight bracket; 31, support block; 32, positioning slot; 33, placement slot; 4, weight assembly; 41, preload weight; 42, loading weight; 43, guide cone; 44, connecting screw; 45, guide cone groove; 5, slider guide; 6, vertical plate; 7, lifting drive module; 71, servo motor; 72, lead screw; 73, lead screw nut; 8, human-computer interaction screen; 9, electric control box; 10, meter stand; 11, test base; 111, positioning column; 112, exhaust hole. DETAILED DESCRIPTION

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

[0033] Example 1

[0034] See also Figure 1-8 The utility model provides the following technical solutions: a bellows stiffness and height detection device, comprising a bottom plate 1, a vertical plate 6 is installed above the bottom plate 1, two parallel slider guide rails 5 are installed on the side of the vertical plate 6, a weight bracket 3 is connected to the slider of the slider guide rail 5, a lifting drive module 7 is also installed on the side of the vertical plate 6, the output end of the lifting drive module 7 is connected to the weight bracket 3, a weight assembly 4 is placed on the weight bracket 3, a meter frame 10 is also installed above the bottom plate 1, and the meter frame 10 A digital micrometer 2 is installed on it, the upper end of the measuring axis of the digital micrometer 2 is connected to the weight assembly 4, and a test base 11 located at the lower end of the measuring axis of the digital micrometer 2 is also installed above the base plate 1. An electric control box 9 is provided on one side of the base plate 1, and a PLC controller is installed inside the electric control box 9. The digital micrometer 2 and the lifting drive module 7 are respectively connected to the PLC controller signal. The digital micrometer 2 adopts Mitutoyo's 543-790B model, and the PLC controller adopts Omron's CP1H model.

[0035] By adopting the above technical solution, the utility model realizes automated detection, ensures the accuracy of the detection result, and can simultaneously detect the height and rigidity of the bellows, thereby improving the detection efficiency.

[0036] Specifically, a human-machine interaction screen 8 is installed on the front surface of the electric control box 9, and the human-machine interaction screen 8 is connected to the PLC controller signal. The human-machine interaction screen 8 adopts the MT4414T type of Bu Ke. A start button is also provided on the front surface of the electric control box 9.

[0037] By adopting the above technical solution, the test results are displayed after each test is completed, providing clear processing opinions for the staff, ensuring the accuracy of the test results and improving work efficiency.

[0038] Specifically, the weight assembly 4 includes a preload weight 41 and a loading weight 42 , wherein a connecting screw 44 is connected to the bottom of the preload weight 41 , and the connecting screw 44 is used to connect to the measuring axis of the digital micrometer 2 , and the loading weight 42 is arranged above the preload weight 41 .

[0039] By adopting the above technical solution, the bellows is compressed in two stages by the pre-compression weight 41 and the loading weight 42, and two height compression values ​​of the bellows are obtained, thereby calculating the stiffness and height of the bellows.

[0040] Specifically, the weight bracket 3 is connected to a support block 31, and a placement groove 33 for accommodating a preloaded weight 41 is provided inside the support block 31. The placement groove 33 is used to accommodate the preloaded weight 41. A positioning groove 32 is provided above the placement groove 33. The positioning groove 32 is used to position the loaded weight 42. The distance from the bottom of the positioning groove 32 to the bottom of the placement groove 33 is greater than the height of the preloaded weight 41.

[0041] By adopting the above technical solution, when the pre-loading weight 41 completely acts on the bellows, the loading weight 42 does not interfere with the pre-loading weight 41 .

[0042] Specifically, the lifting drive module 7 includes a servo motor 71, a screw rod 72 is connected to the output end of the servo motor 71, a screw rod nut 73 is engaged with the screw rod 72, the screw rod nut 73 is connected to the weight bracket 3, the servo motor 71 is connected to the PLC controller signal, and the servo motor 71 adopts the MH201N2JN27 model of Sankyo.

[0043] By adopting the above technical solution, the servo motor 71 drives the screw rod 72 to rotate in positive and negative directions to drive the weight bracket 3 to rise and fall, thereby driving the preload weight 41 and the loading weight 42 to rise and fall. The rise and fall of the preload weight 41 drives the rise and fall of the detection axis of the digital micrometer 2.

[0044] Specifically, a positioning column 111 is connected to the middle position above the test base 11 .

[0045] The above technical solution is used to position the bellows to be tested.

[0046] Example 2

[0047] The present embodiment is different from the first embodiment in that, specifically, a guide cone 43 is provided above the preload weight 41 , and a guide cone groove 45 corresponding to the guide cone 43 is provided at the bottom of the loading weight 42 .

[0048] By adopting the above technical solution, the guiding of the loading weight 42 and the pre-loading weight 41 is achieved.

[0049] Example 3

[0050] The present embodiment is different from the first embodiment in that: specifically, an exhaust hole 112 is provided on the side surface of the test base 11 , and the exhaust hole 112 is connected to the top surface of the positioning column 111 .

[0051] By adopting the above technical solution, it is convenient to exhaust air when testing the bellows, thereby ensuring the accuracy of stiffness and height testing.

[0052] Example 4

[0053] The present embodiment is different from the first embodiment in that: specifically, two of each of the digital micrometer 2 , the weight assembly 4 and the test base 11 are provided.

[0054] By adopting the above technical solution, two inspection stations are equipped to improve the inspection efficiency.

[0055] The utility model detects the bellows in the following steps:

[0056] (1) Zero calibration of the digital micrometer 2: the servo motor 71 drives the screw rod 72 to rotate clockwise, driving the detection axis of the digital micrometer 2 to rise to the highest point of the stroke, placing a calibration block with a height of L0 (L0 is greater than the initial height of the bellows to be tested) on the plane of the test base 11, and then the servo motor 71 drives the screw rod 72 to rotate counterclockwise, driving the detection axis of the digital micrometer 2 to descend until the end of the detection axis contacts the calibration block, and the value of the digital micrometer 2 is reset to zero;

[0057] (2) Place the bellows to be tested on the test base 11, start the equipment, and the servo motor 71 drives the screw 72 to rotate counterclockwise, driving the weight bracket 3 to descend a set distance (at this time, the preload weight 41 is separated from the placement slot 33, but not in contact with the loading weight 42). The preload weight 41 acts on the bellows through the detection axis of the digital micrometer 2, compressing the bellows to a certain height. At this time, the PLC controller records the value L1 of the digital micrometer 2;

[0058] (3) The servo motor 71 continues to drive the screw rod 72 to rotate counterclockwise, driving the weight bracket 3 to descend again by a set distance (at this time, the preload weight 41 pushes the loading weight 42 upward, and the loading weight 42 is separated from the bracket 31). The preload weight 41 and the loading weight 42 act on the bellows through the detection axis of the digital micrometer 2, compressing the bellows again to a certain height. At this time, the PLC controller records the value L2 of the digital micrometer 2;

[0059] (4) The PLC controller calculates the height K and the original height L of the bellows according to the obtained height values ​​L1 and L2, and compares them with the set stiffness range and height range, and displays one of the three signals of high, qualified or low through the human-computer interaction screen 8;

[0060] (5) The servo motor 71 drives the screw rod 72 to rotate clockwise, driving the weight bracket 3 to reset upward, completing one action cycle.

[0061] The stiffness calculation formula is:

[0062] K = (|L2-L1|) / (M2×G);

[0063] The height calculation formula is:

[0064] L=∣L0-L2∣+(M1+M2)×G×K;

[0065] Wherein: M1 is the mass of the preload weight 41; M2 is the mass of the loading weight 42, and G is the acceleration due to gravity.

[0066] In summary, the utility model realizes automated detection, ensures the accuracy of the detection results, and can detect the height and stiffness of the bellows at the same time, thereby improving the detection efficiency; a human-machine interactive screen 8 is installed on the front surface of the electric control box 9 of the utility model, which displays the detection results after each detection is completed, provides clear processing opinions for the staff, ensures the accuracy of the detection results, and improves work efficiency; the utility model compresses the bellows in two stages by preloading weights 41 and loading weights 42, obtains two height compression values ​​of the bellows, and thus calculates the stiffness and height of the bellows; an exhaust hole 112 is provided on the side of the test base 11 of the utility model, and the exhaust hole 112 is connected to the top surface of the positioning column 111, which is convenient for exhausting air when the bellows is detected, thereby ensuring the accuracy of stiffness and height detection; for the detection of bellows of different models, the utility model only needs to replace the test base 11 of the corresponding model, and has good versatility; the utility model has two digital micrometers 2, weight assemblies 4 and test bases 11, and is equipped with two detection stations, thereby improving the detection efficiency.

[0067] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A bellows stiffness and height detection device, comprising a bottom plate, characterized in that: A vertical plate is installed above the base plate, and two parallel slider guides are installed on the side of the vertical plate. A weight bracket is connected to the slider of the slider guide. A lifting drive module is also installed on the side of the vertical plate. The output end of the lifting drive module is connected to the weight bracket, and a weight assembly is placed on the weight bracket. A table frame is also installed above the base plate, and a digital micrometer is installed on the table frame. The upper end of the measuring axis of the digital micrometer is connected to the weight assembly. A test base located at the lower end of the measuring axis of the digital micrometer is also installed above the base plate. An electric control box is provided on one side of the base plate, and a PLC controller is installed inside the electric control box. The digital micrometer and the lifting drive module are respectively connected to the PLC controller signal.

2. A bellows stiffness and height detection device according to claim 1, characterized in that: A human-machine interaction screen is installed on the front surface of the electric control box, and the human-machine interaction screen is connected with the PLC controller signal.

3. A bellows stiffness and height detection device according to claim 1, characterized in that: The weight assembly comprises a pre-stressing weight and a loading weight, wherein a connecting screw is connected to the bottom of the pre-stressing weight, and the loading weight is arranged above the pre-stressing weight.

4. A bellows stiffness and height detection device according to claim 3, characterized in that: A guide cone is arranged above the preload weight, and a guide cone groove corresponding to the guide cone is arranged at the bottom of the loading weight.

5. A bellows stiffness and height detection device according to claim 3, characterized in that: The weight bracket is connected with a support block, the interior of the support block is provided with a placement groove for accommodating the pre-loaded weight, and a positioning groove is provided above the placement groove.

6. A bellows stiffness and height detection device according to claim 1, characterized in that: The lifting drive module comprises a servo motor, an output end of the servo motor is connected with a lead screw, a lead screw nut is meshed on the lead screw, and the lead screw nut is connected to a weight bracket.

7. A bellows stiffness and height detection device according to claim 1, characterized in that: A positioning column is connected to the middle position above the test base.

8. A bellows stiffness and height detection device according to claim 7, characterized in that: An exhaust hole is provided on the side of the test base, and the exhaust hole is connected to the top surface of the positioning column.

9. A bellows stiffness and height detection device according to claim 1, characterized in that: The digital display micrometer, the weight assembly and the test base are each provided with two.

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