CN218955703U - Graphite piston inspection device - Google Patents

Abstract

The utility model discloses a graphite piston inspection device, which comprises a cylinder, a fixed seat and two photoelectric detection components, wherein the fixed seat is arranged on the cylinder; the air cylinder is arranged along the vertical direction and is transparent; the inside of the fixed seat is provided with an installation space for accommodating the air cylinder, the top of the fixed seat is provided with a feed inlet, and the feed inlet is directly communicated with the top opening of the air cylinder so as to allow the graphite piston to be inspected to enter the air cylinder through the feed inlet; the photoelectric detection components are arranged in the installation space and are positioned on the outer side of the air cylinder, and the two photoelectric detection components are arranged at intervals along the height direction of the air cylinder. The scheme can realize non-contact type inspection of the outer diameter of the graphite piston, and avoid damage to the surface of the graphite piston caused by a contact type inspection tool.

Description

Graphite piston inspection device

Technical Field

The utility model relates to the technical field of gas flow meters, in particular to a graphite piston inspection device.

Background

The key point of the accurate measurement of the dry gas flowmeter is that the gap between the graphite piston and the glass cylinder is small enough to meet the relation that the ratio of the single-side gap to the height of the piston is about 1:1000, so that the leakage quantity between the piston and the cylinder is small enough under the action of gas viscosity, and the flow measurement error caused by the leakage quantity is negligible.

The ideal clearance fit between the graphite piston and the glass cylinder is realized, the piston and the cylinder are subjected to effective quality inspection before pairing and assembly, and the dimensional errors of the outer diameter of the piston and the inner diameter of the cylinder are ensured to meet the design requirements. When the outer diameter size of the graphite piston is tested, it is found that since the graphite piston is made of powder material, the conventional contact type testing tool such as an outside micrometer cannot avoid damaging the surface of the piston, and the use is directly affected in serious cases.

The above information disclosed in this background section is only for enhancement of understanding of the background section of the application and therefore it may not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

Aiming at the problems pointed out in the background art, the utility model provides a graphite piston inspection device, which adopts non-contact inspection to the outer diameter size of a graphite piston, and avoids damage to the surface of the graphite piston caused by a contact inspection tool.

In order to achieve the aim of the utility model, the utility model is realized by adopting the following technical scheme:

the utility model provides a graphite piston inspection device, comprising:

the air cylinder is placed in the vertical direction and is transparent;

the graphite piston to be inspected enters the cylinder through the feeding hole;

the photoelectric detection assemblies are arranged in the installation space and are located on the outer side of the air cylinder, and the two photoelectric detection assemblies are arranged at intervals along the height direction of the air cylinder.

In some embodiments of the present application, the fixing base includes base, footstock and detection seat, the base is located the bottom of detection seat, the footstock is located the top of detection seat, the bottom of cylinder with the base is connected, the top of cylinder with the footstock is connected, be equipped with in the detection seat and supply the installation space that the cylinder was worn to pass, enclose into be equipped with on the wall of installation space photoelectric detection subassembly, be equipped with on the footstock the feed inlet.

In some embodiments of the present application, the above-located photodetection assembly is disposed near the top of the detection seat, and the below-located photodetection assembly is disposed near the bottom of the detection seat.

In some embodiments of the present application, the top, bottom, and side of the installation space are open;

the base is provided with a bottom mounting hole for mounting the bottom of the air cylinder, the top seat is provided with a top mounting hole for mounting the top of the air cylinder, and the feed inlet is directly communicated with the top mounting hole.

In some embodiments of the present application, the bottom of the detection seat is connected with the base through a plurality of bottom support columns arranged at intervals, and the top of the detection seat is connected with the top support columns arranged at intervals between the top seat.

In some embodiments of the present application, the footstock includes footstock one portion and footstock two portions, footstock one portion is located the top of footstock two portions, be equipped with on the footstock one portion the feed inlet, footstock two portions with the top of cylinder is connected.

In some embodiments of the present application, the feed inlet is of an inverted cone structure.

In some embodiments of the present application, a classification part is arranged at the bottom of the fixing seat, the classification part comprises a motor and a deflector rod, and the deflector rod is arranged at the power shaft end of the motor;

the bottom of the air cylinder is open and is communicated with the bottom space of the fixing seat, the graphite piston falls to the bottom of the fixing seat through the air cylinder, and the deflector rod is used for poking qualified products to one side of the fixing seat and defective products to the other side of the fixing seat.

In some embodiments of the present application, a bottom mounting hole for mounting the bottom of the cylinder is provided on the fixing base, the bottom of the fixing base is further provided with a first groove, a second groove, and a third groove, the first groove and the second groove are symmetrically arranged with the bottom mounting hole as a center, the first groove and the second groove extend to the outer side of the fixing base, and the third groove is used for giving way for mounting the motor;

the deflector rod dials qualified products to the first groove and defective products to the second groove.

In some embodiments of the present application, a backing plate is provided at the bottom of the fixing base, and the backing plate is used for receiving a graphite piston falling from the cylinder.

Compared with the prior art, the utility model has the advantages and positive effects that:

in the inspection device disclosed by the application, graphite piston falls in the cylinder, and whether the external diameter of graphite piston meets the requirements is judged through detecting the time T of the graphite piston passing through the upper photoelectric detection assembly and the lower photoelectric detection assembly, so that the non-contact detection of the external diameter size of the graphite piston is realized, the damage to the surface of the graphite piston caused by a contact inspection tool is avoided, the whole structure is compact, and the operation is convenient.

Other features and advantages of the present utility model will become apparent upon review of the detailed description of the utility model in conjunction with the drawings.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic diagram of a graphite piston inspection apparatus according to an embodiment;

FIG. 2 is an exploded view of a graphite piston inspection apparatus according to an embodiment;

FIG. 3 is a schematic view of a cylinder and graphite piston according to an embodiment;

FIG. 4 is a schematic view of a portion of a top base according to an embodiment;

FIG. 5 is a schematic view of the structure of the base from the bottom side according to an embodiment;

reference numerals:

100-cylinder;

200-graphite pistons;

310-upper photoelectric detection assembly, 320-lower photoelectric detection assembly, 330-infrared emission tube and 340-infrared receiving tube;

400-a fixed seat, 410-a base, 411-a first groove, 412-a second groove, 413-a third groove, 414-a bottom mounting hole, 420-a top seat, 421-a first top seat, 422-a second top seat, 423-a feed inlet, 424-a top mounting hole, 430-a detection seat, 431-a mounting space, 440-a base plate, 450-a top support column and 460-a bottom support column;

500-classification part, 510-motor, 520-deflector rod.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

The embodiment discloses a graphite piston detection device, referring to fig. 1, which mainly comprises a cylinder 100, a fixing seat 400 and two photoelectric detection components.

The cylinder 100 is placed in the vertical direction, the cylinder 100 is transparent, and when the outer diameter of the graphite piston 200 is checked, the graphite piston 200 falls from the top to the bottom of the cylinder 100 under the action of gravity.

The fixing base 400 is used for installing the air cylinder 100, an installation space for accommodating the air cylinder 100 is arranged in the fixing base 400, a feed inlet 423 is arranged at the top of the fixing base 400, and the feed inlet 423 is directly opposite to and communicated with the top opening of the air cylinder 100 so that the graphite piston 200 to be inspected can enter the air cylinder 100 through the feed inlet 423.

The two photoelectric detection assemblies are respectively marked as an upper photoelectric detection assembly 310 and a lower photoelectric detection assembly 320, are arranged in the installation space and are positioned on the outer side of the cylinder 100, and are arranged at intervals along the height direction of the cylinder 100. Referring to fig. 3, the distance between two photodetecting components is L.

Each photoelectric detection assembly comprises an infrared emission tube 330 and an infrared receiving tube 340, wherein the infrared receiving tube 340 is used for receiving infrared light emitted by the infrared emission tube 330, and the infrared emission tube 330 and the infrared receiving tube 340 are oppositely arranged outside the cylinder.

The infrared transmitting tube 330 transmits infrared light with a designated frequency after modulation, and as the air cylinder 100 is transparent, the infrared light emitted by the infrared transmitting tube 330 passes through the air cylinder 100 and is received by the infrared receiving tube 340 at the other side. The infrared receiving tube 340 can only receive infrared light of a designated frequency to prevent interference of ambient light.

When the graphite piston 200 moves in the cylinder 100 but does not pass through the photodetection assembly, the infrared receiving tube 340 has signal reception; when the graphite piston 200 passes through the photoelectric detection assembly, the infrared receiving tube 340 receives no signal, and the position signal of the graphite piston 200 is judged according to the signal.

The working process of the graphite piston inspection device is as follows: the graphite piston 200 to be inspected enters the cylinder 100 through the feeding hole 423 and slowly falls under the action of gravity, and the falling speed is related to the size of a gap between the graphite piston 200 and the inner wall of the cylinder 100. If the ratio of the gap between the two and the height of the graphite piston 200 meets the relation of 1:1000, the time from the falling length of the upper photoelectric detection assembly 3 passing L to the falling length of the lower photoelectric detection assembly of the graphite piston is recorded as T, and the piston to be detected is a qualified product. The graphite piston 200 eventually falls out of the bottom of the cylinder 100, completing the inspection.

If the time taken for the graphite piston 200 to be inspected to fall from the upper photoelectric detection assembly 310 to the lower photoelectric detection assembly 320 is less than T, it is indicated that the ratio of the gap between the graphite piston 200 and the inner wall of the cylinder 100 to the height of the graphite piston 200 is greater than 1:1000, and the gap is too large, and at this time, the gas leakage amount of the graphite piston 200 when moving in the cylinder 100 is larger, does not meet the use requirement, and is inspected as a defective product.

If the time taken for the graphite piston 200 to be detected to fall from the upper photoelectric detection assembly 310 to the lower photoelectric detection assembly 320 is greater than T, it is indicated that the ratio of the gap between the graphite piston 200 and the inner wall of the cylinder 100 to the height of the graphite piston 200 is less than 1:1000, the gap is too small, and at this time, the resistance of the graphite piston 200 moving in the cylinder 100 is large, does not meet the use requirement, and is detected as a defective product.

The graphite piston 200 falls down in the cylinder 100, and whether the outer diameter of the graphite piston 200 meets the requirement is judged by detecting the time T that the graphite piston 200 passes through the upper photoelectric detection assembly and the lower photoelectric detection assembly, so that the non-contact detection of the outer diameter size of the graphite piston 200 is realized, the damage to the surface of the graphite piston 200 caused by a contact type detection tool is avoided, the whole structure is compact, and the operation is convenient.

In some embodiments of the present application, referring to fig. 1, the fixing base 400 includes a base 410, a top base 420, and a detection base 430. The base 410 is disposed at the bottom of the detection seat 430, and the top seat 420 is disposed at the top of the detection seat 430. The bottom of cylinder 100 is connected with base 410, and the top of cylinder 100 is connected with footstock 420, is equipped with the installation space 431 that supplies cylinder 100 to wear to pass in the detection seat 430, is equipped with photoelectric detection subassembly on the wall that encloses installation space 431, is equipped with feed inlet 423 on the footstock 420.

The bottom of the cylinder 100 is fixed by means of the base 410, the top of the cylinder 100 is fixed by means of the top seat 420, the main body portion of the cylinder 100 is in non-contact with the detection seat 430, and the detection seat 430 is used for installing a photoelectric detection assembly, so that the photoelectric detection assembly can be located on the outer peripheral side of the cylinder 100 to detect a position signal of the graphite piston 200.

In some embodiments of the present application, the upper photoelectric detection assembly 310 is disposed near the top of the detection seat 430, the lower photoelectric detection assembly 320 is disposed near the bottom of the detection seat 430, and in a limited installation space, the distance L between the upper photoelectric detection assembly 310 and the lower photoelectric detection assembly 320 is sufficiently large, which is helpful for improving the accuracy of the time T when the graphite piston 200 passes through the two photoelectric detection assemblies, thereby being helpful for improving the inspection accuracy of the graphite piston 200.

In some embodiments of the present application, the top, bottom, and side of the installation space 431 are open, that is, the detection seat 430 is in a U-shaped structure, so that on one hand, the installation of the cylinder 100 is facilitated, and on the other hand, the cylinder 100 is visible from the side opening of the installation space 431, so that the movement state of the graphite piston 200 in the cylinder 100 is convenient to be observed.

The base 410 is provided with a bottom mounting hole 414 for mounting the bottom of the cylinder 100, and the top seat 420 is provided with a top mounting hole 424 for mounting the top of the cylinder 100, so that reliable mounting of the cylinder 100 is realized.

Referring to fig. 5, the bottom mounting hole 414 has a circular hole structure, and the base of the cylinder 100 is inserted into the bottom mounting hole 414. Referring to fig. 2, the top mounting hole 424 is a semicircular hole structure with an opened side, and the top of the cylinder 100 is plugged into the top mounting hole 424 from the side.

The feed port 423 is in direct communication with the top mounting hole 424, so that the graphite piston 200 entering from the feed port 423 can smoothly fall into the cylinder 100.

In some embodiments of the present application, the bottom of the detecting seat 430 is connected to the base 410 through a plurality of bottom support columns 460 arranged at intervals, and the top of the detecting seat 430 is connected to the top seat 420 through a plurality of top support columns 450 arranged at intervals.

The base 410, the top seat 420 and the detection seat 430 are connected into a whole through the support column, so that the structure is stable.

In some embodiments of the present application, the top seat 420 includes a first top seat 421 and a second top seat 422, the first top seat 421 is disposed above the second top seat 422, the first top seat 421 is provided with a feeding hole 423, the second top seat 422 is connected with the top of the cylinder 100, and the second top seat 422 is provided with a top mounting hole 424 for mounting the top of the cylinder 100.

The top seat 420 is composed of two parts, a feeding hole 423 is formed in a first part 421 of the top seat, and a top mounting hole 424 is formed in a second part 422 of the top seat, so that the processing and the manufacturing are facilitated.

In some embodiments of the present application, the feed port 423 has an inverted cone structure, and plays a role in guiding the downward movement of the graphite piston 200.

In some embodiments of the present application, referring to fig. 2, a classification part 500 is provided at the bottom of the fixing seat 410, and the classification part 500 is used for automatically classifying the qualified products and the defective products of the graphite piston 200.

The classifying portion 500 includes a motor 510 and a shift lever 520, the shift lever 520 is disposed at a power shaft end of the motor 510, the shift lever 520 is driven by the motor 510 to move, and the shift lever 520 is used for shifting qualified products and defective products to different positions to achieve automatic classification.

The shift lever 520 is made of nylon, and the surface of the graphite piston 200 is not easy to damage when the graphite piston 200 is shifted.

The bottom opening of the cylinder 100 communicates with the bottom space of the fixing base 410, and the graphite piston 200 falls to the bottom of the fixing base 410 through the cylinder 100. After the graphite piston 200 descends along the cylinder 100, the system already judges whether the graphite piston 200 is a qualified product or a defective product according to the time T between the graphite piston 200 passing through the upper photoelectric detection assembly 310 and the lower photoelectric detection assembly 320, and when the graphite piston 200 falls to the bottom of the fixing seat 400, the motor 510 drives the deflector 520 to move according to a system instruction so as to deflect the qualified product to one side of the fixing seat 400 and deflect the defective product to the other side of the fixing seat 400, thereby realizing automatic classification.

In some embodiments of the present application, referring to fig. 5, a cross-shaped groove is disposed at the bottom of the base 410, three grooves are marked as a first groove 411, a second groove 412, and a third groove 413, the first groove 411 and the second groove 412 are symmetrically arranged with the bottom mounting hole 414 as a center, and the third groove 413 is used for giving way to the mounting of the motor 510.

The shift lever 520 shifts the qualified products to the first groove 411 and the defective products to the second groove 412, and the first groove 411 and the second groove 412 extend to the outside of the fixing base 410, so that the graphite piston 200 comes out from the bottom of the base 410 under the shift of the shift lever 520.

In some embodiments of the present application, a backing plate 440 is disposed at the bottom of the fixing base 400, and the backing plate 440 is used for receiving the graphite piston 200 falling from the cylinder 100. The graphite piston 200 dropped from the cylinder 100 is dropped onto the backing plate 440, and then the rod 520 dials the graphite piston 200 into the first groove 411 or the second groove 412.

The soft silica gel layer is attached to the upper surface of the backing plate 440, which protects the graphite piston 200.

In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (10)

1. A graphite piston inspection device, comprising:

the air cylinder is placed in the vertical direction and is transparent;

the graphite piston to be inspected enters the cylinder through the feeding hole;

the photoelectric detection assemblies are arranged in the installation space and are located on the outer side of the air cylinder, and the two photoelectric detection assemblies are arranged at intervals along the height direction of the air cylinder.

2. The graphite piston inspection apparatus of claim 1, wherein,

the fixing base comprises a base, a top seat and a detection seat, wherein the base is arranged at the bottom of the detection seat, the top seat is arranged at the top of the detection seat, the bottom of the cylinder is connected with the base, the top of the cylinder is connected with the top seat, an installation space for the cylinder to pass through is arranged in the detection seat, a photoelectric detection assembly is arranged on the wall of the installation space in a surrounding mode, and the top seat is provided with a feed inlet.

3. The graphite piston inspection apparatus of claim 2, wherein,

the photoelectric detection assembly located above is close to the top of the detection seat, and the photoelectric detection assembly located below is close to the bottom of the detection seat.

4. The graphite piston inspection apparatus of claim 2, wherein,

the top, bottom and side of the installation space are open;

the base is provided with a bottom mounting hole for mounting the bottom of the air cylinder, the top seat is provided with a top mounting hole for mounting the top of the air cylinder, and the feed inlet is directly communicated with the top mounting hole.

5. The graphite piston inspection apparatus of claim 2, wherein,

the bottom of the detection seat is connected with the base through a plurality of bottom support columns arranged at intervals, and the top of the detection seat is connected with the top seat through a plurality of top support columns arranged at intervals.

6. The graphite piston inspection apparatus of claim 5, wherein,

the top seat comprises a first top seat part and a second top seat part, wherein the first top seat part is arranged above the second top seat part, the first top seat part is provided with the feeding hole, and the second top seat part is connected with the top of the air cylinder.

7. The graphite piston inspection device according to any one of claims 1 to 6, wherein,

the feed inlet is of an inverted cone structure.

8. The graphite piston inspection device according to any one of claims 1 to 6, wherein,

the bottom of the fixed seat is provided with a classification part, the classification part comprises a motor and a deflector rod, and the deflector rod is arranged at the power shaft end of the motor;

the bottom of the air cylinder is open and is communicated with the bottom space of the fixing seat, the graphite piston falls to the bottom of the fixing seat through the air cylinder, and the deflector rod is used for poking qualified products to one side of the fixing seat and defective products to the other side of the fixing seat.

9. The graphite piston inspection apparatus of claim 8 wherein,

the bottom of the fixed seat is also provided with a first groove, a second groove and a third groove, the first groove and the second groove are symmetrically arranged by taking the bottom mounting hole as a center, the first groove and the second groove extend to the outer side of the fixed seat, and the third groove is used for giving way for mounting of the motor;

the deflector rod dials qualified products to the first groove and defective products to the second groove.

10. The graphite piston inspection apparatus of claim 9 wherein,

the bottom of fixing base is equipped with the backing plate, the backing plate is used for accepting from the graphite piston that the cylinder falls down.

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