CN217466575U - True density detection device and true density instrument - Google Patents
True density detection device and true density instrument Download PDFInfo
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- CN217466575U CN217466575U CN202221805395.9U CN202221805395U CN217466575U CN 217466575 U CN217466575 U CN 217466575U CN 202221805395 U CN202221805395 U CN 202221805395U CN 217466575 U CN217466575 U CN 217466575U
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- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 238000005086 pumping Methods 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 15
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 210000004907 gland Anatomy 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011549 displacement method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
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Abstract
The application discloses true density detection device and true density appearance. The real density detection device is used for a real density instrument and comprises a main body and a cover body. The main part is internally provided with a holding cavity and a filter cavity communicated with the holding cavity, the holding cavity is used for holding sample tubes, the filter cavity is used for holding a filter assembly, and the main part is also provided with an air pumping channel communicated with the filter cavity. The cover body is arranged on the main body to seal the accommodating cavity. So, through placing the sample that will await measuring in the sample cell and detect, the influence of sudden change air current to the sample that awaits measuring when can effectively reducing to bleed avoids splashing of the sample that awaits measuring. Simultaneously, be provided with filtering component in bleed passage department, can filter the sample that awaits measuring along with the air current splash, avoid flowing into in the bleed passage and cause the jam, effectively promote detection device's precision.
Description
Technical Field
The application relates to the technical field of detecting instruments, in particular to a true density detecting device and a true density instrument.
Background
The true density is typically determined by measuring the true volume and mass of the sample to be tested, and the true volume can be accurately determined by measuring the reduction in gas volume within the sample testing chamber caused by the sample being placed in the sample testing chamber. However, in the existing detection device, because the through interface is small, the gas flow rate when pumping air is large, and the sudden change gas flow drives the sample to splash easily and enters the pipeline along with the gas flow, so that the pipeline has a blocking risk, and meanwhile, the detection result has a large error.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a true density detection device and a true density instrument.
The real density detection device of the embodiment of the application is used for a real density instrument and comprises a main body and a cover body. The main body is internally provided with a containing cavity and a filter cavity communicated with the containing cavity, the containing cavity is used for containing sample tubes, the filter cavity contains a filter assembly, and the main body is also provided with an air pumping channel communicated with the filter cavity. The cover body is arranged on the main body to seal the accommodating cavity.
Among the real density detection device in this application embodiment, through placing the sample that awaits measuring in the sample cell and detect, the influence of sudden change air current to the sample that awaits measuring when can effectively reducing to bleed avoids splashing of the sample that awaits measuring. Simultaneously, be provided with filtering component in bleed passage department, can filter the sample that awaits measuring along with the air current splash, avoid flowing into in the bleed passage and cause the jam, effectively promote detection device's precision.
In some embodiments, the sample tube includes a tube body having a sample cavity formed therein and a cap covering the sample cavity, the tube body and the cap being threadably connected.
In some embodiments, the tube body includes a bottom wall and a peripheral wall connected to the bottom wall, and an outer wall surface of the bottom wall is provided with an air groove, and the air groove is arranged to penetrate through the bottom wall in a radial direction of the bottom wall.
In some embodiments, the top surface of the tube cover is formed with a blind hole for cooperating with a screw to facilitate the taking and placing of the sample tube.
In some embodiments, the filter assembly includes a filter screen disposed within the filter cavity and covering the air evacuation passageway, and a fastener for securing the filter screen.
In some embodiments, the inner wall of the filter cavity is formed with an internal thread, the outer wall of the fixing member is formed with an external thread adapted to the internal thread, and the fixing member is fixed in the filter cavity by a thread to fix the filter screen.
In some embodiments, a through hole is formed inside the fixing member along the direction from the accommodating cavity to the air suction channel, and the through hole communicates the air suction channel and the accommodating cavity.
In some embodiments, the cover body includes an inner cover covering the receiving cavity and a pressing cover disposed over the inner cover, and the inner cover and the pressing cover are both threadedly coupled to the main body.
In some embodiments, the cover body includes a sealing member disposed at a bottom of the inner cover, the sealing member sealing a gap between the inner cover and the main body when the inner cover covers the receiving cavity.
The real density appearance of this application embodiment includes vacuum pump and the real density detection device in any above-mentioned embodiment, the vacuum pump includes the pneumatic valve, the vacuum pump pass through the pneumatic valve with air exhaust channel intercommunication.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of a true densitometer according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a densitometer according to an embodiment of the present application;
FIG. 3 is a schematic perspective view of a sample tube according to an embodiment of the present disclosure;
fig. 4 is a schematic perspective view of a sample tube according to an embodiment of the present disclosure.
Description of the main element symbols:
a true density instrument 200, a vacuum pump 201 and an air valve 202;
the real density detection device 100, the main body 10, the accommodating chamber 11, the filter chamber 12, the air exhaust channel 13, the cover body 20, the inner cover 21, the gland 22, the sealing member 23, the sample tube 30, the tube body 31, the bottom wall 311, the air groove 312, the peripheral wall 313, the sample chamber 314, the tube cover 32, the blind hole 321, the screw rod 322, the filling block 33, the filter assembly 40, the filter screen 41, the fixing member 42, and the through hole 421.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.
Referring to fig. 1, a vacuum density meter 200 according to an embodiment of the present disclosure includes a vacuum pump 201 and a vacuum density detecting apparatus 100 according to an embodiment of the present disclosure, the vacuum pump 201 includes an air valve 202, and the vacuum pump 201 is communicated with an air exhaust channel 13 in the vacuum density detecting apparatus 100 through the air valve 202. The vacuum pump 201 as an air-extracting device can extract the gas in the true density detection apparatus 100 through the air-extracting passage 13, so that the inside of the true density detection apparatus 100 is in a vacuum state. The air valve 202 may be an electromagnetic valve or a pneumatic valve, and the air valve 202 may function to control the on/off and the air pumping rate of the vacuum pump 201.
It is understood that the true density meter 200 mainly applies archimedes' principle (gas expansion displacement method) to detect true density of the sample to be measured. The specific principle can be as follows: because the volume of the gas which can be contained in the true density detection device 100 is constant, part of the gas can be extruded out after the sample to be detected is put in, and then the residual gas is pumped out through the vacuum pump 201 to obtain the volume of the pumped gas, so that the true volume of the sample to be detected can be obtained. The true density of the sample to be measured can be obtained by the ratio of the mass of the sample to be measured to the true volume thereof.
Referring to fig. 1 to 3, a true density detection apparatus 100 according to an embodiment of the present disclosure includes a main body 10 and a cover 20. An accommodating cavity 11 and a filter cavity 12 communicated with the accommodating cavity 11 are formed in the main body 10, the accommodating cavity 11 is used for accommodating the sample tube 30, the filter cavity 12 is provided with a filter assembly 40, the main body 10 is further formed with an air pumping channel 13, and the air pumping channel 13 is communicated with the filter cavity 12. The cover 20 is disposed on the main body 10 to seal the receiving cavity 11.
In the true density detection device 100 and the true density instrument 200 in the embodiment of the application, the sample to be detected is placed in the sample tube 30 for detection, so that the influence of sudden change airflow on the sample to be detected during air suction can be effectively reduced, and the splashing of the sample to be detected is avoided. Meanwhile, the filtering assembly 40 is disposed at the air exhaust channel 13, so as to filter the sample to be detected which splashes out along with the air flow, avoid the blocking caused by the flowing into the air exhaust channel 13, and effectively improve the precision of the true density detection apparatus 100.
Specifically, the main body 10 may be configured as a rectangular structure, and the accommodating cavity 11 may be formed inside the main body, and an opening of the accommodating cavity 11 may be generally disposed upward, so as to conveniently take and place the sample tube 30, and the sample tube 30 may be used for accommodating a sample to be tested. The holding cavity 11 is formed in the main body 10 in an embedded mode, so that the temperature of a sample to be detected in the detection process and the temperature of the internal gas can be consistent, and the detection result error caused by the temperature difference is avoided.
The quantity of holding chamber 11 can be provided with a plurality ofly, and the size shape of a plurality of holding chambers 11 can be different, and then can detect the sample that awaits measuring of equidimension not. For example, three accommodating cavities 11 may be provided in the main body 10, the three accommodating cavities 11 may accommodate sample tubes 30 of three sizes, i.e., a small sample tube, a medium sample tube, a large sample tube, a medium sample tube, and a large sample tube, respectively, the three accommodating cavities 11 are independently arranged at intervals, and the determination of the real volume of the sample to be measured can be independently completed in each accommodating cavity 11.
The accommodating cavity 11 may be a cylinder, and correspondingly, the sample tube 30 may also be a hollow cylinder structure, so as to facilitate taking and placing of the sample tube 30 in the accommodating cavity 11. That is, the shape of the sample tube 30 can be adapted to the shape of the accommodating chamber 11.
Further, a gap is required to be properly left between the outer wall surface of the sample tube 30 and the inner wall surface of the accommodating cavity 11, so as to facilitate the flow of the air flow during air extraction. Of course, the shape of the main body 10, the shape of the accommodating cavity 11, and the shape of the sample tube 30 are not limited in the present application, and the accommodating cavity 11 in the main body 10 can accommodate the sample tube 30, and the sample tube 30 can accommodate the sample to be measured.
Because the sample to be measured is placed in the sample tube 30, when the gas in the accommodating cavity 11 is further extracted, even if the sample to be measured is light, the gas flow does not have great influence on the sample to be measured, and the phenomenon that the sample to be measured splashes and is brought into the air exhaust channel 13 along with the gas flow to block the air exhaust channel 13 is avoided.
The filter assembly 40 is arranged in the filter cavity 12, the filter assembly 40 covers the air exhaust channel 13, and the filter assembly 40 can filter a sample to be detected carried in air flow, so that the sample to be detected is prevented from entering the air exhaust channel 13 along with the air flow, and the air exhaust channel 13 is prevented from being blocked.
The cover body 20 is detachably disposed on the main body 10 and covers the opening end corresponding to the accommodating cavity 11, and when the cover body 20 is disposed on the accommodating cavity 11, the accommodating cavity 11 can be kept sealed, so that the vacuum pump 201 can pump the accommodating cavity 11 to a vacuum state when pumping through the pumping channel 13.
Because the volume in the accommodating cavity 11 is fixed, the volume of the gas contained in the accommodating cavity 11 is fixed, and the volume of the sample bottle is also fixed. After the sample tube 30 containing the sample to be measured is placed, a portion of the gas will be squeezed out. The containing cavity 11 is vacuumized by covering the cover body 20, and the volume of the extracted gas is recorded. The volume of the sample to be measured can be the volume value obtained by subtracting the volume of the sample bottle from the volume of the accommodating cavity 11 and then subtracting the volume of the extracted gas. The true density of the sample to be measured can be obtained by calculating the ratio of the mass to the volume of the sample to be measured.
Referring to fig. 2 and 3, in some embodiments, the sample tube 30 includes a tube body 31 and a tube cap 32, a sample cavity 314 is formed in the tube body 31, the tube cap 32 covers the sample cavity 314, and the tube body 31 and the tube cap 32 are screwed together.
So, the sample that awaits measuring can be placed in sample chamber 314, and tube cap 32 and body 31 threaded connection show promptly that there is the clearance between body 31 and the tube cap 32, and the gas accessible clearance in the sample chamber 314 is taken out, and tube cap 32 can effectively prevent that the sample that awaits measuring from receiving the influence of air current and splashing.
Specifically, body 31 can be the cylinder structure, and body 31 is inside to be formed with sample cavity 314 that has the open-ended, and the opening of sample cavity 314 is towards the top, is convenient for await measuring getting of sample and putting. The tube cap 32 may also be of circular configuration. The outer wall of the cap 32 may be formed with threads, and correspondingly, the inner wall of the tube 31 may be formed with matching threads, and the tube 31 and the cap 32 may be screwed or unscrewed.
There will be certain clearance between the screw thread, under vacuum pump 201's extraction, the gas in sample chamber 314 can be taken out by the gap within a definite time, and then not only can slow down the velocity of flow of air current, also can prevent that the sample that awaits measuring is taken out to the sample chamber 314 outside along with the air current. A small gap exists between the outer wall of the tube 31 and the inner wall of the accommodating cavity 11, so that the sample to be detected can be further prevented from flowing into the air exhaust channel 13 along the gap to cause blockage.
Referring to fig. 2 and 3, in some embodiments, the tube 31 includes a bottom wall 311 and a peripheral wall 313 connected to the bottom wall 311, the outer wall of the bottom wall 311 is provided with an air groove 312, and the air groove 312 penetrates the bottom wall 311 along a radial direction.
Thus, when the sample tube 30 is placed in the accommodating cavity 11, the bottom wall 311 of the sample tube may be attached to the bottom wall 311 of the accommodating cavity 11 under the action of air pressure, which affects the air pumping process, and the arrangement of the air groove 312 can prevent the bottom wall 311 of the sample tube 30 from blocking the filter cavity 12, so that the air flow smoothly flows into the filter cavity 12 and is further pumped out through the air pumping channel 13.
Specifically, if the bottom wall 311 is a plane, the sample bottle may block the opening of the filter cavity 12 under the action of air pressure during air suction, so that the internal air cannot be drawn out, thereby affecting the detection process.
The air groove 312 may be formed by recessing the outer wall of the bottom wall 311 toward the side of the sample chamber 314, and the air groove 312 transversely penetrates the bottom wall 311. The formation position of the air groove 312 on the bottom wall 311 may correspond to the filter chamber 12 below. When the sample tube 30 is placed into the accommodating chamber 11, the air flow flows to the air groove 312 along the gap between the sample tube 30 and the accommodating chamber 11, and then flows into the air suction channel 13 through the filter chamber 12.
Referring to fig. 2 and 4, in some embodiments, the top surface of the cap 32 is formed with a blind hole 321, and the blind hole 321 is used to cooperate with the screw 322 to facilitate the taking and placing of the sample tube 30.
Because the clearance of its periphery wall 313 and the inner wall of holding chamber 11 is less after the sample bottle is put into to holding chamber 11, bare-handed sample bottle can't be taken out, and then the accessible stretches into screw rod 322 and connects in the blind hole 321 to the tube cap 32 top, and pulling screw rod 322 just can be taken out the sample bottle by holding chamber 11 for taking of sample bottle is more convenient.
Simultaneously, when placing the sample bottle, if directly put into the sample bottle free fall, probably make to appear colliding with between diapire 311 and the holding chamber 11, and then influence the gas volume in the holding chamber 11, and then accessible screw rod 322 places the sample bottle gently, avoids influencing the whole volume in holding chamber 11.
Referring to fig. 2, in some embodiments, the filter assembly 40 includes a filter screen 41 disposed in the filter cavity 12 and covering the suction channel 13, and a fixing member 42 for fixing the filter screen 41.
Like this, filter screen 41 can filter the air current of flowing through, avoids the sample that awaits measuring to get into to air exhaust passage 13 in, and mounting 42 can fix filter screen 41 for filter screen 41 installs stably in filter chamber 12.
Specifically, the filter screen 41 may be a copper screen or other filter element, wherein the filter screen 41 needs to avoid using a slag-dropping material, so as to prevent the residue of the filter screen 41 from entering the air exhaust channel 13. The filter screen 41 can be placed at the bottom of the filter cavity 12 and cover the air exhaust channel 13, and then the air must be filtered through the filter screen 41 and then pumped out when flowing to the air exhaust channel 13 from the accommodating cavity 11, so as to avoid the sample to be measured being pumped out to the air exhaust channel 13.
The fixing member 42 may be a cylindrical structure, and the fixing member 42 is disposed in the filter cavity 12 and above the filter screen 41 to press the filter screen 41, so as to prevent the filter screen 41 from moving and fix the filter screen 41. Since the filter screen 41 is periodically replaced after a period of use, the fixing member 42 is detachably connected to the filter chamber 12 to facilitate replacement of the filter screen 41.
Referring to fig. 2, in some embodiments, the inner wall of the filter cavity 12 is formed with an internal thread, the outer wall of the fixing member 42 is formed with an external thread matching with the internal thread, and the fixing member 42 is fixed in the filter cavity 12 by a thread to fix the filter screen 41. Thus, the fixing member 42 is stably fixed in the filter chamber 12 by the screw thread to better fix the filter screen 41, and the screw thread connection also makes the mounting and dismounting of the fixing member 42 more convenient, so as to facilitate the replacement of the filter member. In addition, the threaded connection has a clearance, and air can be drawn through the connection clearance between the fastener 42 and the filter chamber 12.
Referring to fig. 2, in some embodiments, a through hole 421 is formed inside the fixing member 42 along the direction from the accommodating cavity 11 to the air exhaust channel 13, and the through hole 421 communicates the air exhaust channel 13 and the accommodating cavity 11.
Thus, the air inside the accommodating cavity 11 can be pumped into the air pumping channel 13 through the through hole 421, so that the air flow can be pumped more smoothly.
Specifically, the central point of the fixing member 42 may be formed with a through hole 421 that penetrates the setting, two ends of the through hole 421 are respectively communicated with the accommodating cavity 11 and the air exhaust channel 13, and then the air exhaust channel 13 can extract air in the accommodating cavity 11 through the through hole 421, and the air in the accommodating cavity 11 sequentially flows through the through hole 421 and the filter screen 41, and then can be extracted to the outside of the air exhaust channel 13, so as to better detect the real volume of the sample to be detected.
Referring to fig. 1 and 2, in some embodiments, the cover body 20 includes an inner cover 21 and a pressing cover 22, the inner cover 21 covers the receiving cavity 11, the pressing cover 22 is disposed above the inner cover 21, and the inner cover 21 and the pressing cover 22 are screwed with the body 10.
So, inner cup 21 plays main sealed effect, and gland 22 can prevent that inner cup 21 is not hard up, and then under inner cup 21 and gland 22's combined action, can avoid the condition that appears leaking gas at the evacuation in-process, promotes the precision that detects.
Specifically, the inner cover 21 may have a circular structure, and the diameter of the inner cover 21 is larger than the opening diameter of the accommodating cavity 11, so that the inner cover 21 can completely cover the accommodating cavity 11. The inner cover 21 and the main body 10 can be connected through threads, when the inner cover 21 is covered and arranged above the accommodating cavity 11, the accommodating cavity 11 can be tightly sealed by the inner cover 21, and external air is prevented from entering the accommodating cavity 11 from the upper cover in the vacuumizing process.
The pressing cover 22 may have a circular structure, the pressing cover 22 is disposed above the inner cover 21, and the pressing cover 22 may be screwed to the main body 10. The screwing directions of the inner cap 21 and the gland 22 may be opposite directions or the same direction, which is not limited in the present application. After the inner cover 21 is screwed, the gland 22 above the inner cover is screwed, the inner cover 21 is further pressed, the air tightness of the accommodating cavity 11 is improved, and air leakage is avoided.
Referring to fig. 1 and 2, in some embodiments, the cover body 20 includes a sealing member 23, the sealing member 23 is disposed at a bottom of the inner cover 21, and the sealing member 23 seals a gap between the inner cover 21 and the main body 10 when the inner cover 21 covers the receiving cavity 11.
Thus, the sealing member 23 can further improve the air tightness of the accommodating chamber 11, and prevent air leakage from occurring during the vacuum pumping process to affect the measurement result.
Specifically, the sealing member 23 may be provided in an annular structure, the diameter of the sealing member 23 is larger than the opening diameter of the accommodating chamber 11, and the sealing member 23 is provided on the outer wall surface of the inner lid 21 on the side facing the accommodating chamber 11. When the inner cover 21 is disposed above the accommodating chamber 11, the sealing member 23 is located around the opening of the accommodating chamber 11 and tightly clamped between the gap between the inner cover 21 and the main body 10, so as to better seal the gap between the inner cover 21 and the main body 10, and effectively improve the air tightness of the accommodating chamber 11.
Referring to fig. 2, in some embodiments, when the volume of the sample to be measured is small, a filling block 33 may be disposed inside the sample tube 30. The packing 33 is a solid block having a certain volume, and can reduce the volume of the gas to be pumped out. Because the volume of the sample to be detected is smaller, the volume of the pumped gas can be reduced by adding the filling block 33 with fixed volume, and the purpose of reducing the detection error of the sample to be detected is achieved. Of course, the present application is not limited to the specific shape, material, and the like of the filling block 33, and the filling block 33 may be an article with a known volume and can be put into the sample tube 30.
In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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 application. In this specification, schematic representations of the above terms do not necessarily refer 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.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A true density detection device for a true density instrument, the true density detection device comprising:
the sample tube filtering device comprises a main body, wherein an accommodating cavity and a filtering cavity communicated with the accommodating cavity are formed in the main body, the accommodating cavity is used for accommodating a sample tube, the filtering cavity is provided with a filtering component, and the main body is also provided with an air pumping channel communicated with the filtering cavity; and
the cover body is arranged on the main body to seal the accommodating cavity.
2. The detection apparatus according to claim 1, wherein the sample tube comprises a tube body and a tube cap, wherein a sample cavity is formed in the tube body, the tube cap covers the sample cavity, and the tube body and the tube cap are in threaded connection.
3. The detection device according to claim 2, wherein the tube body includes a bottom wall and a peripheral wall connected to the bottom wall, and an outer wall surface of the bottom wall is provided with an air groove penetrating in a radial direction of the bottom wall.
4. The detecting device for detecting the rotation of a sample tube according to claim 2, wherein the top surface of the tube cover is formed with a blind hole, and the blind hole is used for being matched with a screw rod so as to facilitate the taking and placing of the sample tube.
5. The detection device according to claim 1, wherein the filter assembly includes a filter screen and a fixing member, the filter screen is disposed in the filter chamber and covers the air-extracting passage, and the fixing member is configured to fix the filter screen.
6. The detection device as claimed in claim 5, wherein an inner thread is formed on an inner wall of the filter chamber, an outer thread adapted to the inner thread is formed on an outer wall of the fixing member, and the fixing member is fixed in the filter chamber by a thread to fix the filter screen.
7. The detecting device for detecting the rotation of the motor rotor according to the claim 5, wherein a through hole is formed inside the fixing member along the direction from the containing cavity to the air suction channel, and the through hole is communicated with the air suction channel and the containing cavity.
8. The detecting device for detecting the rotation of a motor rotor as claimed in claim 1, wherein the cover body comprises an inner cover and a pressing cover, the inner cover covers the containing cavity, the pressing cover is arranged above the inner cover, and the inner cover and the pressing cover are both connected with the main body through threads.
9. The detecting device for detecting the rotation of a motor rotor as claimed in claim 8, wherein the cover body includes a sealing member disposed at a bottom portion of the inner cover, the sealing member sealing a gap between the inner cover and the main body when the inner cover covers the receiving cavity.
10. A true density instrument, comprising:
a vacuum pump comprising a gas valve;
the true density detection device of any of claims 1-9, wherein the vacuum pump is in communication with the pumping channel through the gas valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221805395.9U CN217466575U (en) | 2022-07-14 | 2022-07-14 | True density detection device and true density instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221805395.9U CN217466575U (en) | 2022-07-14 | 2022-07-14 | True density detection device and true density instrument |
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| CN217466575U true CN217466575U (en) | 2022-09-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117949344A (en) * | 2024-03-27 | 2024-04-30 | 中国重型机械研究院股份公司 | Titanium and titanium alloy electrode integrated forming density detection device |
| CN118625159A (en) * | 2024-08-14 | 2024-09-10 | 宁德时代新能源科技股份有限公司 | Solid-state battery detection device and detection method and battery production equipment |
-
2022
- 2022-07-14 CN CN202221805395.9U patent/CN217466575U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117949344A (en) * | 2024-03-27 | 2024-04-30 | 中国重型机械研究院股份公司 | Titanium and titanium alloy electrode integrated forming density detection device |
| CN118625159A (en) * | 2024-08-14 | 2024-09-10 | 宁德时代新能源科技股份有限公司 | Solid-state battery detection device and detection method and battery production equipment |
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Address after: No. 1631, North Office, 10th Floor, New Material Venture Building, No. 7 Fenghui Middle Road, Haidian District, Beijing 100094 Patentee after: Beijing Guoyi Precision Measurement Technology Co.,Ltd. Patentee after: Guoyi Quantum Technology (Hefei) Co.,Ltd. Address before: No. 1631, North Office, 10th Floor, New Material Venture Building, No. 7 Fenghui Middle Road, Haidian District, Beijing 100094 Patentee before: Beijing Guoyi Precision Measurement Technology Co.,Ltd. Patentee before: Guoyi Quantum (Hefei) Technology Co.,Ltd. |