CN218972140U

CN218972140U - Detection device for detecting air tightness of lift tube

Info

Publication number: CN218972140U
Application number: CN202223238789.3U
Authority: CN
Inventors: 马亮; 古良; 沈达维; 李鑫; 杜玉泉; 张锐
Original assignee: SHAANXI HUANGHE GROUP CO Ltd
Current assignee: SHAANXI HUANGHE GROUP CO Ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-05-05
Anticipated expiration: 2032-12-02

Abstract

The embodiment of the disclosure relates to a detection device for detecting the air tightness of a lift tube. The device comprises: the upper flange plate is arranged at the top of the lift tube, a circle of sealing groove is formed in the surface of the upper flange plate, which is close to the top of the lift tube, and the upper sealing groove is matched with the top of the lift tube; wherein, the upper flange plate is provided with an air inlet hole which is communicated with the liquid lifting pipe; the lower flange plate is arranged at the bottom of the lift tube and used for sealing the bottom of the lift tube; and the screws are arranged between the upper flange plate and the lower flange plate and are used for connecting the upper flange plate with the lower flange plate so as to seal and compress the liquid lifting pipe. The upper sealing groove is formed in one end of the upper flange plate, the upper sealing groove is matched with the top of the liquid lifting pipe, the top of the liquid lifting pipe is sealed, the bottom of the liquid lifting pipe is sealed through the lower flange plate, the upper flange plate and the lower flange plate are connected through the screw, and the liquid lifting pipe can be sealed and pressed through the screw.

Description

Detection device for detecting air tightness of lift tube

Technical Field

The embodiment of the disclosure relates to the technical field of defect detection of low/differential pressure casting lift tubes, in particular to a detection device for detecting the air tightness of a lift tube.

Background

The low pressure casting principle is that liquid metal is filled into a casting cavity from bottom to top under the action of pressure, and solidified under the action of pressure to obtain a casting. In low pressure casting equipment, the mold is placed on a crucible through a sealing cover plate, and is fixed by a threaded rod and compression. And starting the control system, wherein compressed air introduced into the crucible can form certain pressure on the liquid level of the molten metal, so that the molten metal is filled from bottom to top by the liquid lifting pipe according to the set casting parameters.

However, in the casting process, once the liquid lifting pipe leaks at a certain position, the position of the casting is incomplete in the mold filling process, so that the defects of insufficient casting, air hole slag inclusion and the like are generated. The liquid lifting tube is formed by welding a long cylinder penetrating into the lower part of the metal liquid surface and a conical flange arranged on a sealing cover plate due to the special structure, and the welding spot is easy to generate defects, so that the liquid lifting tube leaks air. In the process of casting and carrying the lift tube for many times, the lift tube is influenced by man-made collision and molten metal corrosion, and the long cylinder also has the risk of air leakage.

In the production process of the previous period, the defects of air holes and insufficient casting appear in part of castings, and the actual curve and the ideal curve have poor contact ratio from the casting curve. Analyzing the cause of the problem, the first one may be due to leakage of the lift tube; the second possibility is damage to the components on the equipment, causing problems with feedback delays in the casting curve, affecting the casting. It is necessary to detect and eliminate defects in the lift tube.

In the related art, the detection method of the X-ray has the defects of inaccurate result reading and the like. The existing referent device is complex in structure and poor in operability, and in the casting process, whether the liquid lifting pipe leaks air or not is observed through the observation hole, so that the referent device is not safe, and waste of finished castings is caused.

Accordingly, there is a need to improve one or more problems in the related art as described above.

It is noted that this section is intended to provide a background or context for the technical solutions of the present disclosure as set forth in the claims. The description herein is not admitted to be prior art by inclusion in this section.

Disclosure of Invention

It is an object of embodiments of the present disclosure to provide a detection apparatus for detecting the airtightness of a lift tube, which overcomes one or more of the problems due to the limitations and disadvantages of the related art, at least to some extent.

According to the detection device for detecting the air tightness of the lift tube provided by the embodiment of the disclosure, a round cover is sleeved outside the bottom of the lift tube, and the device comprises:

the upper flange plate is arranged at the top of the lift tube, a circle of upper sealing groove is formed in the surface of the upper flange plate, which is close to the top of the lift tube, and the upper sealing groove is matched with the top of the lift tube; wherein, the upper flange plate is provided with an air inlet hole which is communicated with the liquid lifting pipe;

the lower flange plate is arranged at the bottom of the lift tube and used for sealing the bottom of the lift tube;

and the screws are arranged between the upper flange plate and the lower flange plate and are used for connecting the upper flange plate with the lower flange plate so as to seal and compress the liquid lifting tube.

In an embodiment of the disclosure, an upper sealing ring is disposed in the upper sealing groove, and is used for further sealing the upper flange plate and the top of the lift tube.

In an embodiment of the disclosure, a circle of lower sealing groove is arranged on the upper surface of the lower flange plate, the lower sealing groove is located below the round cover on two sides of the lift tube, and the lower sealing groove is matched with a place which is a protruding part in the lower surface of the round cover.

In an embodiment of the present disclosure, a groove center of the lower seal groove is located directly below a center between a bottom peripheral wall of the lift tube and the dome.

In an embodiment of the disclosure, a lower sealing ring is disposed in the lower sealing groove, and is used for further sealing between the dome and the lower flange.

In an embodiment of the disclosure, an air inlet valve is disposed in the air inlet hole.

In an embodiment of the disclosure, the upper flange plate is provided with a plurality of through holes, the lower flange plate is provided with a plurality of threaded holes, the number of the through holes is equal to the number of the threaded holes, and the hole center of each through hole is collinear with the hole center of the threaded hole right below each through hole.

In an embodiment of the disclosure, each screw rod sequentially penetrates through the through hole of the upper flange plate and the threaded hole of the lower flange plate from top to bottom.

In an embodiment of the disclosure, a nut is disposed on the screw rod near the upper surface of the upper flange plate, and is used for fastening the screw rod and the upper flange plate.

In an embodiment of the disclosure, a spacer is disposed between the screw and the nut near the upper surface of the upper flange, for further tightening the screw and the upper flange.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:

in the embodiment of the disclosure, through the device, an upper sealing groove is formed at one end through the upper flange plate, and the upper sealing groove is matched with the top of the lift tube, so that the top of the lift tube is sealed; the bottom of the liquid lifting pipe is sealed through the lower flange, and the screw rod is connected between the upper flange and the lower flange, so that the liquid lifting pipe is sealed and pressed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

FIG. 1 illustrates a schematic diagram of a detection apparatus for detecting the air tightness of a lift tube in an exemplary embodiment of the present disclosure;

FIG. 2 illustrates a schematic view of a front view of a flange in an exemplary embodiment of the present disclosure;

FIG. 3 illustrates a schematic top view of a flange on an exemplary embodiment of the present disclosure;

FIG. 4 illustrates a schematic view of a front view of a lower flange in an exemplary embodiment of the present disclosure;

fig. 5 shows a schematic diagram of a top view of a lower flange in an exemplary embodiment of the present disclosure.

In the figure: 100. a lift tube; 110. a dome; 200. an upper flange plate; 210. an upper seal groove; 220. an upper sealing ring; 230. an air inlet hole; 240. an intake valve; 250. a through hole; 300. a lower flange; 310. a lower seal groove; 320. a threaded hole; 400. a screw; 410. and (3) a nut.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of embodiments of the disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.

In this exemplary embodiment, a detection device for detecting the air tightness of a lift tube is provided first. Referring to fig. 1, the apparatus may include: an upper flange 200, a lower flange 300, and a plurality of screws 400.

The upper flange 200 is arranged at the top of the lift tube 100, a circle of sealing grooves 210 are formed in the surface of the upper flange 200, which is close to the top of the lift tube 100, and the upper sealing grooves 210 are matched with the top of the lift tube 100; wherein, the upper flange 200 is provided with an air inlet 230, and the air inlet 230 is communicated with the lift tube 100;

a lower flange 300 disposed at the bottom of the lift tube 100 for sealing the bottom of the lift tube 100;

and a plurality of screws 400 disposed between the upper flange 200 and the lower flange 300 for connecting the upper flange 200 and the lower flange 300 to seal and compress the lift tube 100.

By the device, one end of the upper sealing groove 210 is formed through the upper flange plate 200, and the upper sealing groove 210 is matched with the top of the lift tube 100, so that the top of the lift tube 100 is sealed; the bottom of the lift tube 100 is sealed by the lower flange 300, and the screw 400 connects the upper flange 200 and the lower flange 300, so that the lift tube 100 is sealed and pressed.

Next, the respective parts of the above-described detecting device for detecting the airtightness of the lift tube 100 in the present exemplary embodiment will be described in more detail with reference to fig. 1 to 5.

In one embodiment, as shown in fig. 1 to 3, the detecting means for detecting the airtightness of the lift tube 100 includes an upper flange 200 at the top of the lift tube 100, a lower flange 300 at the bottom of the lift tube 100, and a plurality of screws 400. A plurality of screw rods 400 are penetrated between the upper flange plate 200 and the lower flange plate 300 and used for fastening the upper flange plate 200 and the lower flange plate 300 on the lift tube 100 so as to realize sealing and pressing of the lift tube 100. Further, since the top of the long cylinder of the lift tube 100 is deformed in the use process to cause the unevenness of the height direction of the surface, a circle of sealing grooves 210 are formed on the surface of the upper flange 200 near the bottom of the lift tube 100, and the upper sealing grooves 210 are matched with the top of the lift tube 100, and further sealing of the top of the lift tube 100 is achieved by the upper sealing grooves 210 formed on the surface of the upper flange 200. The lower flange 300 is disposed at the bottom of the lift tube 100 to seal the bottom of the lift tube 100. The number of the screws 400 is four, and the upper flange plate 200 and the lower flange plate 300 are selected from 45 steel according to HRC28-32 in consideration of the requirements of stable stress and tight assembly and no air leakage, and have good impact toughness in stress. The upper flange 200 and the lower flange 300 are connected by four screws 400.

In one embodiment, as shown in fig. 1, the air inlet 230 is formed on the upper flange 200, one end of the air inlet 230 far from the lift tube 100 is communicated with the air charging pipeline, and one end of the air inlet 230 near to the lift tube 100 is communicated with the lift tube 100, so as to charge the lift tube 100 with compressed air.

When the airtightness of the lift tube 100 is detected by using the above-described detecting device, the upper flange 200 and the lower flange 300 seal-tightly press the lift tube 100 by the screw 400. The liquid lifting pipe 100 is filled with air through the air inlet 230, and the welding point of the liquid lifting pipe 100 and the part which is easy to generate air leakage in the detection device are buried in water, so that whether air bubbles are generated in the water is observed to judge whether the air leakage and the position of the air leakage. If bubbles are generated in the water, judging that the lift tube 100 leaks air, and marking the leaking position, so that the lift tube 100 can be taken out; if no air bubbles are generated in the water, it is determined that the lift tube 100 is not leaked.

In one embodiment, an upper seal ring 220 is disposed in the upper seal groove 210 for further sealing the upper flange 200 to the top of the lift tube 100. Specifically, as shown in fig. 1, 2 and 3, the upper sealing ring 220 is located in the upper sealing groove 210 and contacts with the top of the lift tube 100, and the upper sealing ring 220 is arranged, so that the sealing effect is better when the upper flange 200 seals the top of the lift tube 100.

In one embodiment, the upper surface of the lower flange 300 is provided with a circle of lower sealing grooves 310, the lower sealing grooves 310 are located below the dome 110 at both sides of the lift tube 100, and the lower sealing grooves 310 are matched with the protrusions formed on the lower surface of the dome 110. Specifically, as shown in fig. 1 and 4, a circle of lower sealing groove 310 is formed on the upper surface of the lower flange 300, and the lower sealing groove 310 is located below the round cover 110 on both sides of the lift tube 100, and in the use process of the lift tube 100, the round cover 110 on the outer peripheral side of the lift tube 100 will present a protruding portion, so the sealing effect of the lower flange 300 and the lift tube 100 during assembly is better due to the formation of the lower sealing groove 310.

In one embodiment, the slot center of the lower seal slot 310 is located directly below the center between the bottom peripheral wall of the lift tube 100 and the dome 110. Specifically, as shown in fig. 1, to satisfy the force balance and prevent the influence of deformation of the lift tube 100, the center of the lower seal groove 310 is located directly below the center between the bottom peripheral wall of the lift tube 100 and the dome 110.

In one embodiment, a lower seal ring is disposed in the lower seal groove 310, so as to further seal between the dome 110 and the lower flange 300. Specifically, the lower sealing ring disposed in the lower sealing groove 310 can prevent the abrasion between the lower flange 300 and the bottom of the lift tube 100 during assembly, and the influence of the generated air leakage on the air tightness detection result of the lift tube 100, so as to realize the further sealing between the dome 110 and the lower flange 300 on the outer periphery of the lift tube 100.

In one embodiment, an intake valve 240 is disposed within the intake aperture 230. Specifically, as shown in FIG. 1, an intake valve 240 is provided in the intake port 230, and the intake valve 240 is assembled with the intake port 230 so as to control whether or not compressed air of 0.5 to 0.7MPA enters the lift tube 100.

In one embodiment, the upper flange 200 is provided with a plurality of through holes 250, the lower flange 300 is provided with a plurality of threaded holes 320, the number of through holes 250 is equal to the number of threaded holes 320, and the center of each through hole 250 is collinear with the center of the threaded hole 320 directly below each through hole 250. Specifically, as shown in fig. 2, 3, 4 and 5, the upper flange 200 is uniformly provided with a plurality of through holes 250, the lower flange 300 is uniformly provided with a plurality of threaded holes 320, the hole center of each through hole 250 is collinear with the hole center of the threaded hole 320 directly below the through hole 250, and further, the number of through holes 250 is equal to the number of threaded holes 320. If the number of through holes 250 is 4, the number of screw holes 320 is also 4.

In one embodiment, each screw 400 is sequentially inserted through the through hole 250 of the upper flange plate and the threaded hole 320 of the lower flange plate 300 from top to bottom. Specifically, as shown in fig. 1, the screw 400 sequentially penetrates through the through hole 250 of the upper flange 200 from top to bottom, the threaded hole 320 of the lower flange 300 is provided with an internal thread, the peripheral wall of the screw section penetrating through the threaded hole 320 is provided with an external thread, and the external thread is matched with the internal thread, so that the screw 400 is fixed to the lower flange 300.

In one embodiment, a nut 410 is provided on the screw 400 near the upper surface of the upper flange 200 for fastening the screw 400 to the upper flange 200. Specifically, as shown in fig. 1, after the screw 400 passes through the through hole 250 on the upper flange 200, a nut 410 is disposed on a screw section of the screw 400 near the upper surface of the upper flange 200, and the screw 400 and the upper flange 200 are further fastened by the nut 410.

In one embodiment, a spacer is provided between the screw 400 and the nut 410 near the upper surface of the upper flange 200 for further fastening the screw 400 and the upper flange 200. Specifically, a gasket is sleeved on the screw 400, and the gasket is located between the screw 400 and the nut 410, so that the fastening effect of the nut 410 when fastening the screw 400 and the upper flange 200 is better. When the screw 400 and the nut 410 fasten the upper flange 200, the screw 400 is screwed down after passing through the upper through hole 250 of the upper flange 200 and the threaded hole 320 of the lower flange 300, so that the screw 400 is fastened to the threaded hole 320 of the lower flange 300, and then a gasket is sleeved on the screw 400 near the upper surface of the upper flange 200, and then the nut 410 is screwed down to fasten. If the air tightness of other lift tubes 100 is to be detected, that is, the lift tubes 100 need to be replaced, and if the number of screws 400 is 4, only one screw 400 needs to be disassembled. When one of the screws 400 needs to be disassembled, the nut 410 is unscrewed, the nut 410 is separated from the screw 400, the screw 400 is unscrewed, and the screw 400 is separated from the threaded hole 320 on the lower flange plate 300, so that the screw 400 is disassembled. In the process of replacing the lift tube 100, the gasket is not required to be repeatedly disassembled, and only the screw 400 and the nut 410 are required to be screwed down when the lift tube 100 is used each time, so that the rapid replacement and the air tightness detection of the lift tube 100 are realized.

When the detection device is used for detecting the air tightness of the liquid lift pipe 100, the measurement result is convenient and accurate to read, complex analysis and judgment are not needed, and the result can be obtained by visually observing whether bubbles are generated in water, and judgment is carried out; compared with the perspective method, the method is safer, and reduces the risk that ionizing radiation in the perspective possibly damages human health; the detection device has low manufacturing cost, and besides the special requirement of the upper flange 200 and the lower flange 300 for machining according to the size of the liquid lifting pipe 100, the gasket, the screw 400 and the nut 410 can be used after being purchased and cut; in addition, by the detection device, the result can be detected in advance, and the rejection rate of cast castings and chemical pollution caused by resin sand are reduced. It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like in the above description are directional or positional relationships as indicated based on the drawings, merely to facilitate description of the embodiments of the present disclosure and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus are not to be construed as limiting the embodiments of the present disclosure.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a 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 embodiments of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the presently disclosed embodiments, the terms "mounted," "connected," "secured," and the like are to be construed broadly, as well as being either fixedly connected, detachably connected, or integrally formed, unless otherwise specifically indicated and defined; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.

In the presently disclosed embodiments, unless expressly stated and limited otherwise, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact 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.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, one skilled in the art can combine and combine the different embodiments or examples described in this specification.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A detection device for detecting lift tube gas tightness, the bottom outside cover of lift tube is equipped with a dome, its characterized in that, this device includes:

2. The device for detecting the air tightness of the lift tube according to claim 1, wherein an upper sealing ring is arranged in the upper sealing groove and is used for further sealing the upper flange plate with the top of the lift tube.

3. The device for detecting the air tightness of a lift tube according to claim 1, wherein a circle of lower sealing grooves are arranged on the upper surface of the lower flange plate, the lower sealing grooves are positioned below round covers on two sides of the lift tube, and the lower sealing grooves are matched with the places, which are protruding parts, in the lower surface of the round cover.

4. A detection apparatus for detecting airtightness of a lift tube according to claim 3, wherein a groove center of the lower seal groove is located directly below a center between a bottom peripheral wall of the lift tube and the dome.

5. The apparatus according to claim 4, wherein a lower seal ring is disposed in the lower seal groove for further sealing between the dome and the lower flange.

6. The device for detecting the air tightness of a lift tube according to claim 1, wherein an air inlet valve is provided in the air inlet hole.

7. The detection device for detecting the air tightness of a lift tube according to claim 1, wherein a plurality of through holes are formed in the upper flange plate, a plurality of threaded holes are formed in the lower flange plate, the number of the through holes is equal to that of the threaded holes, and the hole center of each through hole is collinear with the hole center of the threaded hole right below each through hole.

8. The apparatus according to claim 7, wherein each screw is sequentially inserted through the through hole of the upper flange and the threaded hole of the lower flange from top to bottom.

9. The apparatus according to claim 8, wherein a nut is provided on the screw near the upper surface of the upper flange for fastening the screw to the upper flange.

10. The apparatus according to claim 9, wherein a spacer is provided between the screw near the upper surface of the upper flange and the nut for further fastening the screw to the upper flange.