CN207991907U - Device for precast concrete test block - Google Patents
Device for precast concrete test block Download PDFInfo
- Publication number
- CN207991907U CN207991907U CN201820121867.6U CN201820121867U CN207991907U CN 207991907 U CN207991907 U CN 207991907U CN 201820121867 U CN201820121867 U CN 201820121867U CN 207991907 U CN207991907 U CN 207991907U
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- Prior art keywords
- turntable
- test block
- mold
- hole
- precast concrete
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model belongs to RC axial loading column auxiliary Tools Technology, the more particularly, to device of precast concrete test block.The present apparatus includes for accommodating the mold of concrete, turntable and at least two pressing plates.The side wall of mold is equipped with through-hole；The side wall for constituting the mold of through-hole is equipped with multiple graduation marks；Turntable is located in through-hole, and can be rotated in through-hole；The edge of turntable and the side wall of through-hole are tightly connected, and turntable is equipped with perforative slot；The baffle for fixed blade is additionally provided on turntable；Baffle is adjacent with slot；Sign corresponding with the graduation mark is additionally provided on turntable；The middle part of pressing plate is abutted against with turntable, and both ends are bolted with the side wall of mold respectively.The device can control the angles and positions of blade insertion, and can ensure that crack place plane rule is smooth, produce the satisfactory test block with crack.
Description
Technical field
The utility model belongs to RC axial loading column auxiliary Tools Technology, and more particularly, to precast concrete tries
The device of block.
Background technology
Concrete is the most common basic material of building trade, before construction, needs the quality for detecting concrete, big at present
The mode for mostly using precast concrete test block, by being tested to concrete test block, to detect the quality of concrete.For
For concrete structure, crack is an important factor for influencing its performance, therefore when doing concrete experiments, to need prefabricated band crack
Concrete test block.
At present when making concrete test block, by the way of the casting concrete into mold, and make mixed with crack
When solidifying soil test block, generally blade is inserted into from the top surface of mold and extracts blade when concrete initial set, you can obtain carrying and split
The test block of seam.But use which, can not be accurately controlled the angle of blade insertion, and when concrete does not solidify can occur it is light
Micro- flowing, the position offset so as to cause blade are unable to get the test block with crack needed for experiment.In addition, the top of test block
Face is generally smoothed out with spatula, but manual operation is there are error, and the top surface injustice where crack experimental result will be caused compared with
Big influence.
Utility model content
In view of this, the utility model embodiment provides the device for precast concrete test block, blade can be controlled
The angles and positions of insertion produce the satisfactory test block with crack.
In order to achieve the above objectives, technical solution used by the utility model is：
For the device of precast concrete test block, including：
Mold for accommodating concrete；The side wall of the mold is equipped with through-hole；Constitute the mold of the through-hole
Side wall be equipped with multiple graduation marks；
Turntable is located in the through-hole, and can be rotated in the through-hole；The edge of the turntable and the through-hole
Side wall is tightly connected, and the turntable is equipped with perforative slot；The baffle for fixed blade is additionally provided on the turntable；Institute
It is adjacent with the slot to state baffle；Sign corresponding with the graduation mark is additionally provided on the turntable；With
At least two pressing plates；The middle part of the pressing plate is abutted against with the turntable, and the both ends side with the mold respectively
Wall is bolted.
Further, the mold includes：
If reeded pedestal；With
The die body being vertically arranged；The bottom end of the die body is mutually clamped with the groove, and middle part pours cavity for hollow；
The die body is equipped with the through-hole.
Further, the die body includes：
Left mould, the orthographic projection in horizontal plane are L-shaped；
Right mould, the orthographic projection in horizontal plane is L-shaped, and is set as pouring cavity with the left mould assembly back wall；With
Two locking devices for the left mould to be fixedly connected with the right mould.
Further, each locking device includes：
Support plate is arranged in the end of the right mould, and is fixedly connected with the right mould；
Fixed plate is arranged in the end of the left mould, and is fixedly connected with the left mould；The fixed plate and the support plate
It is arranged side by side；With
Locking folder for the support plate to be fixedly connected with the fixed plate.
Further, the support plate is equipped with the first U-type groove, and the opening direction of first U-type groove and the support plate
Length direction it is perpendicular；The fixed plate be equipped with the second U-type groove, and the opening direction of second U-type groove with it is described solid
The length direction of fixed board is perpendicular；First U-type groove is overlapped with orthographic projection of second U-type groove in perpendicular；
The locking presss from both sides：
Shaft is located in first U-type groove, and length direction is consistent with the length direction of the support plate；The shaft
Both ends and the support plate be rotatablely connected；
Screw rod is located in first U-type groove and second U-type groove, and perpendicular with the shaft；The screw rod
First end is fixedly connected with the shaft, and second end extends to the outside of the fixed plate；With
It is set on the screw rod and screws connector；The connector that screws is connect with the screw flight, and can be with institute
Fixed plate is stated to abut against.
Further, the baffle is equipped at least one bolt hole；The device for precast concrete test block is also
Including at least one positioning bolt；The positioning bolt is adapted with the bolt hole.
Further, the turntable is equipped with sealing shroud, and the sealing shroud is located in the slot.
Further, the angle of multiple graduation mark arrangements is 360 degree；The sign is arrow shaped.
Further, the mold in a rectangular parallelepiped shape, and the thickness of side wall be 1 centimetre to 3 centimetres；The turntable is round platform
Shape, and it is more than the diameter positioned at described die inside one end positioned at the diameter of the mold lateral ends；The shape of the through-hole
It is consistent with the shape of the turntable.
Further, the mold, the turntable and the pressing plate are steel plate.
By adopting the above-described technical solution, the technological progress that the utility model obtains is：
The side wall of mold is equipped with through-hole, and turntable is placed in through-hole.Blade is inserted into the chamber of mold by the slot of turntable
In vivo, it when turntable rotates in through-hole, is rotated in the cavity of mold with cutting blade, since turntable is equipped with sign, structure
It is equipped with graduation mark at the side wall of the mold of through-hole, therefore the angle of blade insertion can be controlled.Moreover, being inserted from the side of mold
Enter blade, the one side rule with crack is smooth in manufactured test block, and experimental data is more accurate.
In addition, blade is fixed on baffle, therefore, the portion that blade is located in cavity body of mould is constant, even if coagulation
Soil has slight flowing, the position of blade that will not deviate.Pressing plate plays position-limiting action, when preventing casting concrete, turntable by
It is fallen to extruding, out of mold through-hole.
It is using advantageous effect caused by above-mentioned technical proposal：The device of precast concrete test block is used in this programme
The angle that blade is inserted into concrete test block can be controlled, and position of the blade in concrete test block remains unchanged, so as to
Access the concrete test block with crack for meeting requirement of experiment.In addition, the present apparatus when in use, is laterally inserted into blade, because
The one side with crack is regular, smooth in this test block, it can be ensured that experimental data is accurate.
Description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without having to pay creative labor, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the schematic diagram for the device for precast concrete test block that the utility model embodiment provides；
Fig. 2 is the vertical view of the use state for the device for precast concrete test block that the utility model embodiment provides
Figure；
Fig. 3 is the assembling schematic diagram for the turntable that the utility model embodiment provides；
Fig. 4 is the schematic diagram for the turntable that the utility model embodiment provides；
Fig. 5 is the assembling schematic diagram for the mold that the utility model embodiment provides；
Fig. 6 is the schematic diagram for the locking device that the utility model embodiment provides.
Reference sign：
10- molds, 11- pedestals, 111- grooves, 121- left moulds, 122- right moulds, 123- locking devices, 1231- support plates,
1232- fixed plates, 1233- shafts, 1234- screw rods, 1235- screw connector, 20- turntables, 21- slots, 22- baffles, and 221- is fixed
Position bolt, 23- signs, 30- pressing plates, 40- blades.
Specific implementation mode
In being described below, for illustration and not for limitation, it is proposed that such as tool of particular system structure, technology etc
Body details, to understand thoroughly the utility model embodiment.However, it will be clear to one skilled in the art that there is no these
The utility model can also be realized in the other embodiments of detail.In other situations, omit to well-known system,
The detailed description of apparatus, circuit and method, in case unnecessary details interferes the description of the utility model.
In order to illustrate technical solution described in the utility model, illustrated below by specific embodiment.
The utility model embodiment provides a kind of device for precast concrete test block, in conjunction with shown in Fig. 1, for pre-
The device of concrete test block processed includes for accommodating the mold 10 of concrete, turntable 20 and at least two pressing plates 30.In conjunction with Fig. 3 institutes
Show, the side wall of mold 10 is equipped with through-hole.The side wall for constituting the mold 10 of the through-hole is equipped with multiple graduation marks.In conjunction with Fig. 2,
Shown in Fig. 3 and Fig. 4, turntable 20 is located in the through-hole, and can be rotated in the through-hole.The edge of turntable 20 leads to described
The side wall in hole is tightly connected, and turntable 20 is equipped with perforative slot 21.The gear for fixed blade 40 is additionally provided on turntable 20
Plate 22.Baffle 22 is adjacent with slot 21.Sign corresponding with the graduation mark 23 is additionally provided on turntable 20.Pressing plate 30
Middle part is abutted against with turntable 20, and side wall of the both ends respectively with mold 10 is bolted.
The side wall of mold 10 is equipped with through-hole, and turntable 20 is placed in through-hole.Blade 40 is inserted by the slot 21 of turntable 20
In the cavity for entering mold 10, when turntable 20 rotates in through-hole, rotated in the cavity of mold 10 with cutting blade 40, due to turntable
20 are equipped with sign, and the side wall for constituting the mold 10 of through-hole is equipped with graduation mark, therefore can control the insertion of blade 40
Angle.
The top surface of mold 10 is opening, pours into mold 10 from opening by concrete when pouring, then will be opened with spatula
Mouthful place's floating, since manual operation is there are error, and bubble when concrete setting, therefore opening inevitably goes out
It is now uneven, irregular phenomenon.In the prior art, it is inserted into blade 40 from opening, when concrete initial set takes out blade 40
Go out, you can form crack, but top surface where crack is irregular, is uneven, large effect can be generated to experimental data.This
In embodiment, it is inserted into blade from the side of mold 10, due to the inner wall smooth of mold 10, smooth, band in manufactured test block
The one side rule in crack is smooth, and experimental data is more accurate.
In addition, blade 40 is fixed on baffle 22, therefore, the portion that blade 40 is located in 10 cavity of mold is constant,
Even if concrete has slight flowing, the position of blade 40 that will not deviate.Therefore, the crack of institute's band is advised in test block obtained
Then, meet requirement of experiment.Pressing plate 30 plays position-limiting action, and when preventing casting concrete, turntable 20 is squeezed, from mold 10
It is fallen in through-hole.
As a kind of embodiment, referring to figure 1 and figure 5, mold 10 includes being equipped with the pedestal 11 of groove 111 and setting vertically
The die body set.The bottom end of the die body is clamped with 111 phase of groove, and middle part pours cavity for hollow.The die body is equipped with
The through-hole.
Concrete injection pours in cavity.111 phase of groove of die body and pedestal 11 is clamped, convenient for being carried out after concrete setting
Form removal.When making test block, die body is caught in groove 111, specifically, screw bolt reinforcing can be used, to prevent from putting on mold 10
When entering shake table vibration, die body detaches with pedestal 11.When form removal, fastening bolt is disassembled, then by die body and pedestal 11
It pulls in the opposite direction, you can disassemble test block from pouring in cavity.Preferably, mold 10 further includes sealing strip, institute
The junction that sealing strip is located at groove 111 and die body is stated, to prevent concrete from being revealed from the junction of groove 111 and die body.
In the prior art, mold 10 mostly uses greatly integrally formed structure, the inner wall adhesion of concrete and mold 10, form removal
There is the case where test block can not take out in Shi Jingchang.Therefore in the present embodiment, die body with pedestal 11 by the way of being detachably connected,
Convenient for taking out test block.
In the present embodiment, in conjunction with shown in Fig. 5, the die body includes left mould 121, right mould 122 and two for by left mould 121
The locking device 123 being fixedly connected with right mould 122.Orthographic projection of the left mould 121 in horizontal plane is L-shaped.Right mould 122 is in level
Orthographic projection in plane is L-shaped, and is set as pouring cavity with the assembled back wall of left mould 121.
Concrete is often sticky on the inner wall of die body, and for ease of disassembling test block out of die body, die body is designed
It is split type.In addition, if die body is divided into polylith template, although being convenient for form removal, assembly is difficult.Therefore die body is divided into left mould
121 and right mould 122, that is, it is convenient for form removal, is also easy to assembly.
In the present embodiment, in conjunction with shown in Fig. 6, each locking device 123 includes support plate 1231, fixed plate 1232 and is used for
The locking folder that support plate 1231 is fixedly connected with fixed plate 1232.Support plate 1231 is arranged in the end of right mould 122, and and right mould
122 are fixedly connected.Fixed plate 1232 is arranged in the end of left mould 121, and is fixedly connected with left mould 121.Fixed plate 1232 and branch
Plate 1231 is arranged side by side.
At the position that left mould 121 is connected with right mould 122, fixed plate 1232, right mould is fixedly installed in the end of left mould 121
Support plate 1231 is fixedly installed in 122 end, and fixed plate 1232 is arranged side by side with support plate 1231, is easily installed locking folder.In addition,
Support plate 1231 can be fixedly installed in the end of left mould 121, fixed plate 1232 is fixedly installed in the end of right mould 122.
Locking device 123 can also be connected by screw bolts or the modes such as card slot clamping, but is bolted and is not easy to dismount, and takes
When it is laborious, and card slot clamping connection is insecure, and leakage is easy when casting concrete.Therefore 1231 He of support plate is set in the present embodiment
Fixed plate 1232 is fixed left mould 121 and right mould 122 by connection support plate 1231 and fixed plate 1232, convenient and efficient, is easy
Operation.
In the present embodiment, in conjunction with shown in Fig. 6, support plate 1231 is equipped with the first U-type groove, and the opening of first U-type groove
Direction and the length direction of support plate 1231 are perpendicular.Fixed plate 1232 is equipped with the second U-type groove, and second U-type groove is opened
Mouth direction and the length direction of fixed plate 1232 are perpendicular.First U-type groove is with second U-type groove in perpendicular
Orthographic projection overlaps.Locking folder includes shaft 1233, screw rod 1234 and is set on screw rod 1234 and screws connector 1235.Turn
Axis 1233 is located in first U-type groove, and length direction is consistent with the length direction of support plate 1231.The both ends of shaft 1233 with
Support plate 1231 is rotatablely connected.Screw rod 1234 is located in first U-type groove and second U-type groove, and hangs down with 1233 phase of shaft
Directly.The first end of screw rod 1234 is fixedly connected with shaft 1233, and second end extends to the outside of fixed plate 1232.Screw connector
1235 are threadedly coupled with screw rod 1234, and can be abutted against with fixed plate 1232.
When making test block, after 122 assembly of left mould 121 and right mould, support plate 1231 and fixed plate 1232 are arranged side by side, rotation
Screw rod 1234 to screw rod 1234 is fully located in the first U-type groove and the second U-type groove, is then screwed connector 1235 and is connect to screwing
First 1235 abut against with fixed plate 1232.When dismounting, twist-on head 1235 is rotated to screwing connector 1235 and fixed plate 1232
Then separation rotates screw rod 1234 to screw rod 1234 and leaves the first U-type groove and the second U-type groove, at this time support plate 1231 and fixed plate
1232 separation, you can detach left mould 121 and right mould 122.
Compared to using bolt to be fixedly connected with support plate 1231 with fixed plate 1232, in the present embodiment, locking folder connects always
It is connected on support plate 1231, only need to rotate screw rod 1234 or screw connector 1235 support plate 1231 and fixed plate 1232 can be realized
Connect or separate, quickness and high efficiency.
As a kind of embodiment, in conjunction with shown in Fig. 3, baffle 22 is equipped at least one bolt hole；It is described to be mixed for prefabricated
The device of solidifying soil test block further includes at least one positioning bolt 221.Positioning bolt 221 is adapted with the bolt hole.Specifically,
Blade 40 is equipped with mounting hole, is aligned with bolt hole after the insertion slot 21 of blade 40, then by mounting hole, then screwed in place spiral shell
Bolt 221, you can blade 40 is fixed on baffle 22.
As a kind of embodiment, turntable 20 is equipped with sealing shroud, and the sealing shroud is located in slot 21.Blade 40 passes through
Sealing shroud is inserted into slot 21.Sealing shroud plays sealing function, prevents from revealing in gap of the concrete from blade 40 with slot 21.
Specifically, sealing shroud is elastic rubber set.Using the elasticity of elastic rubber, the blade 40 of different-thickness can be inserted.
Specifically, in conjunction with shown in Fig. 4, the angle of multiple graduation mark arrangements is 360 degree.Sign 23 is arrow
Shape.By the graduation mark for controlling sign alignment, you can the angle that control turntable 20 rotates is inserted into examination to control blade 40
The angle of block.
Specifically, mold 10 is in a rectangular parallelepiped shape, and the thickness of side wall is 1 centimetre to 3 centimetres.Turntable 20 is round table-like, and
It is more than the diameter positioned at 10 inner opposite end of mold positioned at the diameter of 10 lateral ends of mold.The shape of the shape and turntable 20 of through-hole
Unanimously.
General concrete test block is cuboid, therefore sets mold 10 to rectangular-shape.The thickness of side wall is too small, turntable
20 are difficult to be fixed on the through-hole of side wall.The thickness of side wall is excessive, increases the weight of mold 10, and increase cost of manufacture.According to
Side wall is set as 1 centimetre to 3 centimetres by practical experience, easy to operation.In conjunction with shown in Fig. 3, turntable 20 and through-hole are round platform
Shape, in the direction of insertion along blade 40, the diameter of turntable 20 is smaller and smaller, and the internal diameter of through-hole is smaller and smaller, so as to keep away
Exempt from turntable 20 and falls into the pouring in cavity of mold 10.
Specifically, mold 10, turntable 20 and pressing plate 30 are steel plate, surface is smooth and corrosion-resistant, and service life is long, cycle profit
With rate height.
The angle that blade is inserted into concrete test block can be controlled for the device of precast concrete test block in this programme, and
Position of the blade in concrete test block remains unchanged, so as to obtain the concrete examination with crack for meeting requirement of experiment
Block.In addition, the present apparatus when in use, is laterally inserted into blade, therefore the one side with crack is regular, smooth in test block, can be true
It is accurate to protect experimental data.
Embodiment described above is only to illustrate the technical solution of the utility model, rather than its limitations；Although with reference to before
Embodiment is stated the utility model is described in detail, it will be understood by those of ordinary skill in the art that：It still can be with
Technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features；And
These modifications or replacements, the spirit for various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
And range, it should be included within the scope of protection of this utility model.
Claims (10)
1. the device for precast concrete test block, which is characterized in that including：
Mold for accommodating concrete；The side wall of the mold is equipped with through-hole；Constitute the side of the mold of the through-hole
Wall is equipped with multiple graduation marks；
Turntable is located in the through-hole, and can be rotated in the through-hole；The side wall at the edge of the turntable and the through-hole
It is tightly connected, and the turntable is equipped with perforative slot；The baffle for fixed blade is additionally provided on the turntable；The gear
Plate is adjacent with the slot；Sign corresponding with the graduation mark is additionally provided on the turntable；With
At least two pressing plates；The middle part of the pressing plate is abutted against with the turntable, and both ends respectively with the side wall spiral shell of the mold
It tethers and connects.
2. the device according to claim 1 for precast concrete test block, which is characterized in that the mold includes：
If reeded pedestal；With
The die body being vertically arranged；The bottom end of the die body is mutually clamped with the groove, and middle part pours cavity for hollow；It is described
Die body is equipped with the through-hole.
3. the device according to claim 2 for precast concrete test block, which is characterized in that the die body includes：
Left mould, the orthographic projection in horizontal plane are L-shaped；
Right mould, the orthographic projection in horizontal plane is L-shaped, and is set as pouring cavity with the left mould assembly back wall；With
Two locking devices for the left mould to be fixedly connected with the right mould.
4. the device according to claim 3 for precast concrete test block, which is characterized in that each locking device
Include：
Support plate is arranged in the end of the right mould, and is fixedly connected with the right mould；
Fixed plate is arranged in the end of the left mould, and is fixedly connected with the left mould；The fixed plate and the support plate are side by side
Setting；With
Locking folder for the support plate to be fixedly connected with the fixed plate.
5. the device according to claim 4 for precast concrete test block, it is characterised in that：The support plate is equipped with the
One U-type groove, and the length direction of the opening direction and the support plate of first U-type groove is perpendicular；The fixed plate is equipped with
Second U-type groove, and the opening direction of second U-type groove and the length direction of the fixed plate are perpendicular；First U-type groove
It is overlapped with orthographic projection of second U-type groove in perpendicular；
The locking presss from both sides：
Shaft is located in first U-type groove, and length direction is consistent with the length direction of the support plate；The two of the shaft
End is rotatablely connected with the support plate；
Screw rod is located in first U-type groove and second U-type groove, and perpendicular with the shaft；The first of the screw rod
End is fixedly connected with the shaft, and second end extends to the outside of the fixed plate；It is connect with screwing on the screw rod is set in
Head；The connector that screws is connect with the screw flight, and can be abutted against with the fixed plate.
6. the device according to claim 1 for precast concrete test block, it is characterised in that：The baffle is equipped with extremely
A few bolt hole；The device for precast concrete test block further includes at least one positioning bolt；The positioning bolt
It is adapted with the bolt hole.
7. the device according to claim 1 for precast concrete test block, it is characterised in that：The turntable is equipped with close
Big envelope, and the sealing shroud is located in the slot.
8. the device according to claim 1 for precast concrete test block, it is characterised in that：Multiple graduation mark rows
The angle of row is 360 degree；The sign is arrow shaped.
9. the device according to claim 1 for precast concrete test block, it is characterised in that：The mold is in cuboid
Shape, and the thickness of side wall is 1 centimetre to 3 centimetres；The turntable is round table-like, and big positioned at the diameter of the mold lateral ends
In the diameter positioned at described die inside one end；The shape of the through-hole is consistent with the shape of the turntable.
10. being used for the device of precast concrete test block according to claim 1 to 9 any one of them, it is characterised in that：The mould
Tool, the turntable and the pressing plate are steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820121867.6U CN207991907U (en) | 2018-01-24 | 2018-01-24 | Device for precast concrete test block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820121867.6U CN207991907U (en) | 2018-01-24 | 2018-01-24 | Device for precast concrete test block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207991907U true CN207991907U (en) | 2018-10-19 |
Family
ID=63821096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820121867.6U Expired - Fee Related CN207991907U (en) | 2018-01-24 | 2018-01-24 | Device for precast concrete test block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207991907U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109612796A (en) * | 2018-12-14 | 2019-04-12 | 重庆市排水有限公司 | A kind of distress in concrete simulating test pieces group |
| CN109655327A (en) * | 2018-12-21 | 2019-04-19 | 河南理工大学 | A kind of device for interrupted double cracks class rock test piece |
| CN115326471A (en) * | 2022-10-14 | 2022-11-11 | 南通朗高石化设备有限公司 | Drilling sampling device |
-
2018
- 2018-01-24 CN CN201820121867.6U patent/CN207991907U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109612796A (en) * | 2018-12-14 | 2019-04-12 | 重庆市排水有限公司 | A kind of distress in concrete simulating test pieces group |
| CN109655327A (en) * | 2018-12-21 | 2019-04-19 | 河南理工大学 | A kind of device for interrupted double cracks class rock test piece |
| CN109655327B (en) * | 2018-12-21 | 2021-03-19 | 河南理工大学 | Device for intermittent double-fracture rock mass test piece |
| CN115326471A (en) * | 2022-10-14 | 2022-11-11 | 南通朗高石化设备有限公司 | Drilling sampling device |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181019 Termination date: 20200124 |
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| CF01 | Termination of patent right due to non-payment of annual fee |