CN107101909B - Wet density testing device - Google Patents
Wet density testing device Download PDFInfo
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- CN107101909B CN107101909B CN201710451382.3A CN201710451382A CN107101909B CN 107101909 B CN107101909 B CN 107101909B CN 201710451382 A CN201710451382 A CN 201710451382A CN 107101909 B CN107101909 B CN 107101909B
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
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Abstract
The invention discloses a wet density testing device which comprises a water tank, a hanging scale frame, an electronic scale, a weighing disc, an irregular sample box, an annular sample frame, a resistance heater, a water injection assembly and a drainage assembly, wherein two frame legs of the hanging scale frame are respectively fixed at the tops of two opposite side surfaces of the water tank, the hanging scale frame is provided with a connection which is in relative sliding connection with the hanging scale frame, the connection ring is connected with the top of the electronic scale through a connection rope, the lower part of the electronic scale is connected with the weighing disc through a connection rope and a hook, the irregular sample box and the annular sample frame are respectively arranged at the position, close to the top, of the inner side wall of the water tank, the resistance heater is arranged at the position, close to the bottom, of the inner side wall of the water tank, and the water injection assembly and the drainage assembly are respectively arranged at the positions, close to the top and close to the bottom, and are communicated with the interior of the water tank. The invention can rapidly and accurately measure the wet density of the annular or irregular block-shaped sample.
Description
Technical Field
The invention belongs to the field of solid density testing devices, and particularly relates to a wet density testing device.
Background
In modern product production, processing and research and development of new materials, density is often a critical physical parameter that needs to be measured frequently, which has important reference value for evaluating and improving product or material properties. For various solid samples with density greater than that of water, the traditional density testing device adopts the principle of Archimedes drainage method to calculate the wet density of the sample (the sample volume does not contain open pores but contains closed pores): in the test, the sample is firstly placed on a tray immersed in water to obtain the weight of the sample in the water, and then the weight is calculated according to the formula
(W 0 W is the weight of the sample in air 1 ρ is the weight of the sample in water 1 The density of water) was used to determine the wet density of the sample. Since many solid samples have open pores in their microstructure, if immersed in water only for a short period of time, the air in the open pores cannot be effectively discharged, and it is also necessary to conduct a water boiling treatment to help obtain a more accurate wet density.
Therefore, the measurement of the wet density of solids using the above-described conventional apparatus has the following problems:
1. to accurately obtain the wet density of the sample, the sample needs to be automatically subjected to water boiling pretreatment before weighing;
2. the measurement requires manual movement of the sample into and out of the in-water tray. In order to obtain a more accurate density value, the boiled sample is required to be fully wetted in the process of moving the boiled sample into the tray, so that the air is prevented from reentering the open pores in the sample, the requirement on operators is high, and the error rate is increased. In addition, if the sample is irregular, the moving operation difficulty is higher, and the probability of introducing human errors is also higher.
3. When the number of the tested samples is large, the manual sample changing process is complicated, the influence of the skill level and the state of operators on the test result is increased, more errors are easily introduced, and the consistency and the repeatability of the test are difficult to ensure;
4. the measuring assembly of the device has higher processing precision and cost.
It can be seen that the conventional density testing device has universality, but has many defects when the requirement of testing accuracy is high or the mass test is performed in the face of irregular shapes of materials.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art, and provides a wet density testing device which can rapidly and accurately measure the wet density of annular or irregular block samples, so that the defects of the traditional density measuring device in improving the single-sample wet density testing precision and coping with mass sample density testing can be overcome, and the negative influence of the appearance of the samples on the testing operation can be effectively reduced.
The technical scheme adopted by the invention is as follows: the utility model provides a wet density testing arrangement, includes basin, hangs weighing frame, electronic scale, weighing pan, irregular sample box, cyclic annular sample frame, resistance heater, water injection subassembly and drainage subassembly, two frame feet of hanging the weighing frame are fixed in two opposite side tops of basin respectively, be equipped with rather than relative sliding's connection on the hanging weighing frame, the go-between passes through the connecting rope and is connected with the electronic scale top, the electronic scale below is connected with the weighing pan through connecting rope and couple, irregular sample box and cyclic annular sample frame set up respectively in the position that the basin inside wall is close to the top, resistance heater sets up in the position that the basin inside wall is close to the bottom, water injection subassembly and drainage subassembly set up respectively in the basin outside wall be close to the top and be close to the position of bottom and with the inside intercommunication of basin.
In one embodiment, the weighing tray comprises a cuboid tray, a first tripod with a hanging ring at the top and a second tripod with a hanging hook at the top, wherein the bottom of the second tripod is fixed on one side of the tray and integrally formed with the tray, a rotating shaft through hole is formed in the side face, opposite to the second tripod, of the tray, a rotating shaft matched with the rotating shaft through hole is arranged on the side face of a bottom rod of the first tripod, the rotating shaft is inserted into the rotating shaft through hole of the tray, and the hanging hook of the second tripod is connected with the hanging ring of the first tripod.
In one embodiment, the irregular sample box comprises a top, a chute with an opening on one side surface and a sample grid which is arranged in the chute and slides on the inner side wall of the chute, wherein a connecting through hole is formed in the side surface of the chute opposite to the side surface with the opening, a connecting rod penetrating through the connecting through hole and sliding with the connecting rod is arranged on the side surface of the sample grid, and one end, far away from the sample grid, of the connecting rod penetrates through the side wall of the water tank.
In one embodiment, the annular sample holder comprises a fixed seat fixed on the inner side wall of the water tank, one end of the fixed seat, which is close to the inner side of the water tank, is provided with a cross arm, a push block is connected onto the cross arm in a sliding manner, and a push rod penetrating through the side wall of the water tank is arranged below the push block.
In one embodiment, the water injection assembly comprises a water inlet pipe communicated with the interior of the water tank and a water inlet valve arranged on the water inlet pipe.
In one embodiment, the drain assembly includes a drain pipe in communication with the interior of the sink and a drain valve disposed on the drain pipe.
The invention has the beneficial effects that:
1. when the wet density of the solid sample is measured, the water boiling pretreatment link and the testing link of the sample are integrated, so that the sample transferring link is reduced, and the testing precision is effectively improved;
2. compared with the traditional testing equipment, the invention designs two types of sample injection modes aiming at the appearance characteristics of the sample, optimizes the sample injection process, and avoids the reduction of the accuracy of the wet density calculation result due to the fact that air reenters the sample in the sample moving process;
3. the method has the advantages that the steps are simple when a plurality of samples are measured, the sample replacement is quick, the generation probability of human errors is effectively reduced, the process repeatability is good, and the consistency of test results is high;
4. the device has simple structure, low cost and easy processing.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the weighing pan structure of the present invention;
FIG. 3 is a front view of a weighing pan of the present invention;
FIG. 4 is a schematic view of an irregular sample cartridge according to the present invention;
FIG. 5 is a schematic diagram of the chute structure of the irregular sample box according to the present invention;
FIG. 6 is a schematic diagram of a sample cell structure of an irregular sample cell of the present invention;
FIG. 7 is a schematic view of the annular sample holder of the present invention;
FIG. 8 is a schematic diagram of a sample injection step using an irregular sample cartridge according to the present invention;
FIG. 9 is a schematic diagram of a sample injection step II using an irregular sample cartridge according to the present invention;
FIG. 10 is a schematic diagram of a third step of sampling an irregular sample cartridge according to the present invention;
FIG. 11 is a schematic diagram of a sample injection step using an annular sample holder according to the present invention;
FIG. 12 is a schematic diagram of a sample injection step using an annular sample holder according to the present invention;
FIG. 13 is a schematic diagram of a third sample injection step using an annular sample holder according to the present invention.
In the figure: 1. a water tank; 2. a scale rack is hung; 3. an electronic scale; 4. weighing tray; 5. an irregular sample cartridge; 6. an annular sample holder; 7. a resistance heater; 8. a water injection assembly; 9. a drainage assembly; 41. a tray; 42. a first tripod; 43. a second tripod; 44. a rotating shaft through hole; 45. a rotating shaft; 51. a chute; 52. a sample grid; 53. a connecting through hole; 54. a connecting rod; 61. a fixing seat; 62. a cross arm; 63. a pushing block; 64. a push rod.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
As shown in fig. 1-7, a wet density testing device comprises a water tank 1, a hanging scale frame 2, an electronic scale 3, a weighing disc 4, an irregular sample box 5, an annular sample frame 6, a resistance heater 7, a water injection assembly 8 and a drainage assembly 9, wherein two frame feet of the hanging scale frame 2 are respectively fixed at the tops of two opposite side surfaces of the water tank 1, the hanging scale frame 2 is provided with a connection sliding relatively with the hanging scale frame, a connecting ring is connected with the top of the electronic scale 3 through a connecting rope, the lower part of the electronic scale 3 is connected with the weighing disc 4 through a connecting rope and a hook, the irregular sample box 5 and the annular sample frame 6 are respectively arranged at the position, close to the top, of the inner side wall of the water tank 1, the resistance heater 7 is arranged at the position, close to the bottom, of the outer side wall of the water injection assembly 8 and the drainage assembly 9 are respectively arranged at the position, close to the top and close to the bottom, and are communicated with the interior of the water tank 1.
In this embodiment, the weighing tray 4 includes a cuboid tray 41, a first tripod 41 with a hanging ring at the top, and a second tripod 43 with a hook at the top, wherein the bottom of the second tripod 43 is fixed on one side of the tray 41 and integrally formed with the same, a rotating shaft through hole 44 is formed in the side surface of the tray 41 opposite to the second tripod 43, a rotating shaft 45 matched with the rotating shaft through hole 44 is formed in the side surface of a bottom rod of the first tripod 41, the rotating shaft 45 is inserted into the rotating shaft through hole 44 of the tray 41, and the hook of the second tripod 43 is connected with the hanging ring of the first tripod 42.
In this embodiment, the irregular sample box 5 includes a chute 51 with an opening at the top and one side thereof, and a sample cell 52 disposed in the chute 51 and sliding with the inner sidewall of the chute 51, the side of the chute 51 opposite to the side with the opening is provided with a connecting through hole 53, the side of the sample cell 52 is provided with a connecting rod 54 penetrating through the connecting through hole 53 and sliding therewith, and one end of the connecting rod 54 far from the sample cell 52 penetrates through the sidewall of the sink 1.
In this embodiment, the annular sample holder 6 includes a fixing seat 61 fixed on the inner side wall of the water tank 1, one end of the fixing seat 61, which is close to the interior of the water tank 1, is provided with a cross arm 62, a push block 63 is slidably connected to the cross arm 62, and a push rod 64 penetrating through the side wall of the water tank 1 is disposed below the push block 63.
In this embodiment, the water injection assembly 8 includes a water inlet pipe communicated with the interior of the water tank 1 and a water inlet valve disposed on the water inlet pipe.
In this embodiment, the drain assembly 9 includes a drain pipe communicating with the interior of the water tank 1 and a drain valve provided on the drain pipe.
The testing device provided by the invention comprises the following two testing conditions:
1. adopting an irregular sample box 5 sample feeding process:
step one: as shown in FIG. 8, the weight W in the air has been weighed 0 Is placed in a cell of an irregular sample box 5; the water injection assembly 8 of the water tank 1 is opened, pure water is injected until the sample in the irregular sample box 5 is completely immersed in water, the power supply of the resistance heater 7 is turned on, and the power supply of the resistance heater 7 is turned off after the sample is thoroughly boiled in boiling water;
step two: as shown in fig. 9, the electronic scale 3 hung on the hanging scale frame 2 is horizontally moved, the weighing pan 4 is positioned below the opening end of the irregular sample box 5, and after the weighing pan 4 stands still in water, the numerical value is zeroed by pressing the peeling key of the electronic scale 3; the connecting rod 54 of the irregular sample box 5 is pushed to push the irregular sample into the weighing tray 4, and the reading of the electronic scale 3 at the moment is the weight W of the sample in water 1 According to the formula
The wet density of the sample to be measured can be calculated; if there are multiple samples in the irregular sample box 5, the electronic scale 3 is zeroed again by using the peeling key, then the next sample is pushed into the tray 41 to read a new W 1 Calculating the wet density of the second sample according to the formula, and analogizing the following samples;
step three: as shown in fig. 10, after the test is completed, the hooks on the top of the second tripod 43 on the weighing pan 4 are loosened, and the weighing pan 4 is manually turned over along the rotation axis 45 in the middle part, so that the sample slides into the water tank 1.
2. The process of sampling by adopting the annular sample rack 6:
step one: as shown in FIG. 11, the weight W in the air has been weighed 0 The annular sample of (2) penetrates into the cross arm 62 of the annular sample rack 6; the water injection assembly 8 of the water tank 1 is opened, pure water is injected until the sample on the annular sample rack 6 is completely immersed in water, the power supply of the resistance heater 7 is turned on, and the power supply of the resistance heater 7 is turned off after the sample is thoroughly boiled in boiling water;
step two: as shown in fig. 12, the electronic scale 3 hung on the hanging scale frame 2 is horizontally moved, the weighing pan 4 is positioned below the tail end of the cross arm 62 of the annular sample frame 6, and after the weighing pan 4 stands still in water, the numerical value is zeroed by pressing the peeling key of the electronic scale 3; pushing the push rod 64 of the annular sample rack 6 to push the annular sample into the weighing 4, and reading the electronic scale 3 at the moment to obtain the weight W of the sample in water 1 According to the formula
The wet density of the sample to be measured can be calculated; if there are multiple samples on the annular sample holder 6, the electronic scale is zeroed again with the "peel" key, and then the next sample is pushed into the tray 41 to read a new W 1 Calculating the wet density of the second sample according to the formula, and analogizing the following samples;
step three: as shown in fig. 13, after the test is completed, the hooks on the top of the second tripod 43 on the weighing pan 4 are loosened, and the weighing pan 4 is manually turned over along the rotation axis 45 in the middle part, so that the sample slides into the water tank 1.
In addition, when an irregular sample and a ring-shaped sample are tested at the same time, the two types of processes can be alternately performed in the test process according to the need.
The foregoing examples merely illustrate specific embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (5)
1. A wet density testing device, characterized in that: including basin, string weighing frame, electronic scale, weighing dish, irregular sample box, cyclic annular sample frame, resistance heater, water injection subassembly and drainage subassembly, two frame feet of string weighing frame are fixed in two opposite side tops of basin respectively, be equipped with rather than the relative gliding go-between on the string weighing frame, the go-between passes through the connection rope and is connected with the electronic scale top, the electronic scale below is connected with the weighing dish through connection rope and couple, irregular sample box and cyclic annular sample frame set up respectively in the position that the basin inside wall is close to the top, resistance heater sets up in the position that the basin inside wall is close to the bottom, water injection subassembly and drainage subassembly set up respectively in the basin outside wall be close to the top and be close to the bottom the position and with the inside intercommunication of basin, irregular sample box includes that top and one of them side are opened have open-ended spout and set up in the spout and with spout inside wall gliding sample check, the spout is equipped with the connection through-hole with open-ended side opposite side, the sample check side is equipped with the connecting rod that passes the connection through-hole and rather than gliding one end of basin side wall, the connecting rod passes the side wall of keeping away from the sample check.
2. A wet density testing apparatus according to claim 1, wherein: the weighing tray comprises a cuboid tray, a first tripod with a hanging ring at the top and a second tripod with a hanging hook at the top, wherein the bottom of the second tripod is fixed on one side of the tray and integrally formed with the tray, a rotating shaft through hole is formed in the side face, opposite to the second tripod, of the tray, a rotating shaft matched with the rotating shaft through hole is arranged on the side face of a bottom rod of the first tripod, the rotating shaft is inserted into the rotating shaft through hole of the tray, and the hanging hook of the second tripod is connected with the hanging ring of the first tripod.
3. A wet density testing apparatus according to claim 1, wherein: the annular sample rack comprises a fixed seat fixed on the inner side wall of the water tank, a transverse arm is arranged at one end, close to the inner side of the water tank, of the fixed seat, a push block is connected onto the transverse arm in a sliding mode, and a push rod penetrating through the side wall of the water tank is arranged below the push block.
4. A wet density testing apparatus according to claim 1, wherein: the water injection assembly comprises a water inlet pipe communicated with the inside of the water tank and a water inlet valve arranged on the water inlet pipe.
5. A wet density testing apparatus according to claim 1, wherein: the drainage assembly comprises a drainage pipe communicated with the inside of the water tank and a drainage valve arranged on the drainage pipe.
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| CN201710451382.3A CN107101909B (en) | 2017-06-15 | 2017-06-15 | Wet density testing device |
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| CN201710451382.3A CN107101909B (en) | 2017-06-15 | 2017-06-15 | Wet density testing device |
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| CN107101909B true CN107101909B (en) | 2023-04-25 |
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| CN110793882A (en) * | 2019-11-07 | 2020-02-14 | 哈尔滨工程大学 | Experimental device and method for measuring sea ice density on site |
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