CN212459487U - Device for measuring heat conductivity coefficient of frozen soil - Google Patents
Device for measuring heat conductivity coefficient of frozen soil Download PDFInfo
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- CN212459487U CN212459487U CN202021338526.8U CN202021338526U CN212459487U CN 212459487 U CN212459487 U CN 212459487U CN 202021338526 U CN202021338526 U CN 202021338526U CN 212459487 U CN212459487 U CN 212459487U
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- heat conductivity
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- frozen soil
- temperature control
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Abstract
The utility model relates to a thermal parameter test technical field of frozen soil engineering, specifically a device for determining frozen soil heat conductivity coefficient, including the temperature control case, still include the support, the upper end fixedly connected with roof of support, the upper end fixedly connected with control box of roof, still be equipped with the extrusion subassembly on the roof, the temperature control case is located inside the support, the inside of temperature control case is equipped with the detection tank, be equipped with a plurality of film formula heat conductivity coefficient probes in the detection tank, film formula heat conductivity coefficient probe passes through the wire and connects in the control box, one side of detection tank is equipped with the extrusion regulating assembly; by arranging the extrusion assembly, the piston rod of the electric cylinder can drive the pressurizing plate to pressurize the soil sample in the detection groove, so that the effect of obtaining the static soil pressure in the soil by an indirect method is achieved; through setting up extrusion adjusting part, can adjust the depth of pushing down of increased pressure board to can cooperate the pressurized demand control extrusion subassembly of soil sample, guarantee the accurate control of frozen soil compression strength, effectively reduced the detection data error.
Description
Technical Field
The utility model relates to a frozen soil engineering's thermal parameter test technical field specifically is a device for determining frozen soil coefficient of heat conductivity.
Background
The temperature field is the basis and precondition for the deformation and strength calculation of the frozen soil foundation. And the formation and evolution of the temperature field are closely related to the heat conductivity coefficient of the frozen soil. Under the influence of engineering load (load property and load value), action time and environment change (temperature change and freeze-thaw cycle), the microstructure (particle-pore-ice crystal) and ice-water dynamic balance in the frozen soil are continuously changed, and the determination of the macroscopic thermal conductivity coefficient of the frozen soil is directly influenced.
The initial ground stress is the root cause of the "load" of the excavation. The direct measurement of the static soil pressure of the unfrozen soil or the frozen soil has many problems, such as deformation control and load measurement, the side wall friction and main stress directions, the influence of the soil sample size on the static soil pressure and the like cannot be effectively solved.
In the prior art, a pressure plate is utilized to apply pressure to a moving soil sample, and the static soil pressure in soil is obtained by an indirect method. However, in the process of pressing the soil sample, it is difficult to control the pressing depth of the pressing plate according to actual requirements, so that the degree of pressure applied to the frozen soil cannot be accurately controlled, and the error of detection data is large.
Disclosure of Invention
An object of the utility model is to provide a device for determining frozen soil coefficient of heat conductivity to solve the problem of proposing among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a device for determining frozen soil coefficient of heat conductivity, includes the temperature control case, still includes the support, the upper end fixedly connected with roof of support, the upper end fixedly connected with control box of roof, still be equipped with the extrusion subassembly on the roof, the temperature control case is located inside the support, the inside of temperature control case is equipped with detects the groove, it is equipped with a plurality of film formula coefficient of heat conductivity probes to detect the inslot, film formula coefficient of heat conductivity probe passes through the wire and connects in the control box, one side of detecting the groove is equipped with the extrusion adjusting part.
Preferably, wire passing holes are reserved in the side walls of the temperature control box and the detection groove, and a lead connected with the film type heat conductivity coefficient probe penetrates through the wire passing holes.
Preferably, the extrusion subassembly includes the increased pressure board, the increased pressure board size cooperatees with detecting the groove, the upper end fixedly connected with electric cylinder's of increased pressure board piston rod, electric cylinder fixed connection is in the roof, electric cylinder's drive circuit is connected with the control box.
Preferably, two sides of the piston rod of the electric cylinder are provided with a telescopic guide pillar, and the telescopic guide pillars are fixedly connected between the top plate and the pressurizing plate.
Preferably, the upper end of the temperature control box is detachably and fixedly connected with a box cover, and a through hole matched with the electric cylinder or the piston rod and the telescopic guide post is reserved on the box cover.
Preferably, a sliding groove is formed in one side of the detection groove, sliding holes are communicated with two sides of the sliding groove, and the two sliding holes extend to the surface of the inner wall and the surface of the outer wall of the detection groove respectively.
Preferably, the extrusion adjusting assembly comprises an upper sliding block, a lower sliding block and a screw rod, and the upper sliding block and the lower sliding block are both connected to the sliding groove in a sliding manner; one side wall of the upper sliding block is fixedly connected with a first connecting block, the first connecting block penetrates through one sliding hole and is fixedly connected to the side wall of the pressurizing plate, an accommodating groove is formed in the lower surface of the upper sliding block, one end of a pressure spring is fixedly connected to the bottom of the accommodating groove, the other end of the pressure spring is fixedly connected with a movable seat, and the lower end of the movable seat is fixedly connected with a metal plate; one side wall of the lower sliding block is fixedly connected with a second connecting block, the second connecting block penetrates through one sliding hole and is fixedly connected with a nut seat, the upper end of the lower sliding block is fixedly connected with a first electric contact point and a second electric contact point, the lower sliding block is an insulating block, and the first electric contact point and the second electric contact point are electrically connected with a trigger in the control box; the two ends of the screw rod are rotatably connected with screw rod fixing seats, the screw rod fixing seats are fixedly connected to the surface of the outer wall of the detection groove, the screw rod is in threaded connection with the nut seat, and the upper end of the screw rod is fixedly connected with a rocking handle.
Preferably, the opening part fixedly connected with spacing ring one of holding tank, the periphery wall upper end fixedly connected with spacing ring two of sliding seat.
Compared with the prior art, the beneficial effects of the utility model are that:
1) this a device for determining frozen soil coefficient of heat conductivity through setting up extrusion subassembly, the piston rod of accessible electronic jar drives the pressure plate and pressurizes the soil sample that detects the inslot to play and obtain the effect of static soil pressure in the soil through indirect method.
2) According to the device for measuring the heat conductivity coefficient of the frozen soil, the pressing depth of the pressurizing plate can be adjusted by arranging the extrusion adjusting assembly, so that the extrusion assembly can be controlled in accordance with the pressing requirement of a soil sample, the accurate control of the pressure degree of the frozen soil is ensured, and the error of detection data is effectively reduced; after a soil sample is placed in the detection groove, the rocking handle is rotated according to experiment requirements, the rocking handle drives the screw rod to rotate, the screw rod drives the lower sliding block to move to a preset position of the pressurizing plate through the nut seat and the second connecting block, and then the rocking handle stops rotating; when the pressurizing plate descends, the pressurizing plate drives the upper sliding block to descend along the sliding groove until the metal sheet is in contact with the first electric contact point and the second electric contact point, the circuit is closed, the trigger in the control box receives power to send out a signal, and the electric cylinder stops working after being processed by the control box; thereby realizing the control of the pressing depth of the pressing plate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of part A of FIG. 1;
in the drawings, the components represented by the respective reference numerals are listed below:
the device comprises a temperature control box 1, a support 2, a top plate 3, a control box 4, a detection groove 5, a film type heat conductivity coefficient probe 6, a pressure plate 7, an electric cylinder 8, a telescopic guide post 9, a box cover 10, a sliding groove 11, a sliding hole 12, an upper sliding block 13, a lower sliding block 14, a lead screw 15, a first connecting block 16, a first accommodating groove 17, a pressure spring 18, a movable seat 19, a metal plate 20, a second connecting block 21, a nut seat 22, a first electric contact point 23, a second electric contact point 24, a fixed seat 25 of the lead screw, a rocking handle 26, a first limiting ring 27 and a second limiting ring 28.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a device for measuring the heat conductivity of frozen soil comprises a temperature control box 1 and a support 2, wherein the upper end of the support 2 is fixedly connected with a top plate 3, the upper end of the top plate 3 is fixedly connected with a control box 4, an extrusion component is also arranged on the top plate 3, the temperature control box 1 is positioned in the support 2, a detection groove 5 is arranged in the temperature control box 1, a plurality of film type heat conductivity probes 6 are arranged in the detection groove 5, the film type heat conductivity probes 6 are connected to the control box 4 through wires, and an extrusion adjusting component is arranged on one side of the detection groove 5; wire through holes are reserved on the side walls of the temperature control box 1 and the detection tank 5, and a lead connected with the film type heat conductivity coefficient probe 6 penetrates through the wire through holes.
The extrusion assembly comprises a pressurizing plate 7, the size of the pressurizing plate 7 is matched with the detection groove 5, the upper end of the pressurizing plate 7 is fixedly connected with a piston rod of an electric cylinder 8, the electric cylinder 8 is fixedly connected to the top plate 3, and a driving circuit of the electric cylinder 8 is connected with the control box 4; two sides of a piston rod of the electric cylinder 8 are respectively provided with a telescopic guide pillar 9, and the telescopic guide pillars 9 are fixedly connected between the top plate 3 and the pressurizing plate 7; the upper end of the temperature control box 1 is detachably and fixedly connected with a box cover 10, and a through hole matched with the electric cylinder 8 or the piston rod and the telescopic guide post 9 is reserved on the box cover 10; through setting up the extrusion subassembly, the piston rod of accessible electronic jar 8 drives the pressure plate 7 and pressurizes to the soil sample in detecting groove 5 to play and obtain the effect of quiet soil pressure in the soil through indirect method.
Wherein, a sliding chute 11 is arranged in one side of the detection groove 5, two sides of the sliding chute 11 are communicated with sliding holes 12, and the two sliding holes respectively extend to the surfaces of the inner wall and the outer wall of the detection groove 5; the extrusion adjusting assembly comprises an upper slide block 13, a lower slide block 14 and a screw rod 15, and the upper slide block 13 and the lower slide block 14 are both connected to the chute 11 in a sliding manner; a first connecting block 16 is fixedly connected to one side wall of the upper slider 13, the first connecting block 16 penetrates through one sliding hole 12 and is fixedly connected to the side wall of the pressurizing plate 7, an accommodating groove 17 is formed in the lower surface of the upper slider 13, one end of a pressure spring 18 is fixedly connected to the bottom of the accommodating groove 17, the other end of the pressure spring 18 is fixedly connected with a movable seat 19, and a metal plate 20 is fixedly connected to the lower end of the movable seat 19; a second connecting block 21 is fixedly connected to one side wall of the lower sliding block 14, the second connecting block 21 penetrates through one sliding hole 12 and is fixedly connected with a nut seat 22, a first electric contact point 23 and a second electric contact point 24 are fixedly connected to the upper end of the lower sliding block 14, the lower sliding block 14 is an insulating block, and the first electric contact point 23 and the second electric contact point 24 are electrically connected with a trigger in the control box 4; both ends of the screw rod 15 are rotatably connected with screw rod fixing seats 25, the screw rod fixing seats 25 are fixedly connected to the outer wall surface of the detection groove 5, the screw rod 15 is in threaded connection with the nut seat 22, and the upper end of the screw rod 15 is fixedly connected with a rocking handle 26; a first limit ring 27 is fixedly connected at the opening of the accommodating groove 17, and a second limit ring 28 is fixedly connected at the upper end of the outer peripheral wall of the movable seat 19; the pressing depth of the pressing plate 7 can be adjusted by arranging the extrusion adjusting assembly, so that the extrusion assembly can be controlled by matching with the pressing requirement of the soil sample, the accurate control of the degree of pressure of the frozen soil is ensured, and the error of detection data is effectively reduced; after a soil sample is placed in the detection groove 5, according to the experimental requirements, the rocking handle 26 is rotated, the rocking handle 26 drives the screw rod 15 to rotate, the screw rod 15 drives the lower slide block 14 to move to the preset position of the pressurizing plate 7 through the nut seat 22 and the second connecting block 21, and then the rocking handle 26 stops rotating; when the pressure plate 7 descends, the pressure plate 7 drives the upper sliding block 13 to descend along the sliding groove 11 until the metal sheet 20 contacts with the first electric contact point 23 and the second electric contact point 24, the circuit is closed, the trigger in the control box 4 receives power to send out a signal, and the electric cylinder 8 stops working after being processed by the control box 4; thereby achieving control of the pressing depth of the pressing plate 7.
Wherein, be equipped with temperature control device and temperature sensor in the temperature control case 1, temperature control device and temperature sensor all are connected with control box 4.
The control box 4 and the temperature control box 1 both belong to the prior art.
Principle of operation
When the device for measuring the heat conductivity coefficient of the frozen soil is used, the box cover 10 is opened, the electric cylinder 8 is controlled through the control box 4, the electric cylinder 8 drives the pressurizing plate 7 to lift through the piston rod, and simultaneously drives the box cover 10 to lift; placing a soil sample in the detection tank 5, and arranging a film type heat conductivity coefficient probe 6 in the soil sample; according to the experimental requirements, the rocking handle 26 is rotated, the rocking handle 26 drives the screw rod 15 to rotate, the screw rod 15 drives the lower slide block 14 to move to the preset position of the pressurizing plate 7 through the nut seat 22 and the second connecting block 21, and then the rocking handle 26 is stopped to rotate and the box cover 10 is covered; when the pressure plate 7 descends, the pressure plate 7 drives the upper sliding block 13 to descend along the sliding groove 11 until the metal sheet 20 contacts with the first electric contact point 23 and the second electric contact point 24, the circuit is closed, the trigger in the control box 4 receives power to send out a signal, and the electric cylinder 8 stops working after being processed by the control box 4; thereby achieving control of the pressing depth of the pressing plate 7.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., 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 invention. In this specification, the schematic representations of the terms used above 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.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (8)
1. The utility model provides a device for determining frozen soil coefficient of heat conductivity, includes temperature control box (1), its characterized in that still includes support (2), upper end fixedly connected with roof (3) of support (2), upper end fixedly connected with control box (4) of roof (3), still be equipped with the extrusion subassembly on roof (3), temperature control box (1) is located inside support (2), the inside of temperature control box (1) is equipped with detects groove (5), be equipped with a plurality of film formula coefficient of heat conductivity probe (6) in detecting groove (5), film formula coefficient of heat conductivity probe (6) are connected in control box (4) through the wire, the one side of detecting groove (5) is equipped with the extrusion adjusting part.
2. The device for measuring the heat conductivity of the frozen soil according to claim 1, wherein wire through holes are reserved on the side walls of the temperature control box (1) and the detection tank (5), and a lead connected with the thin film type heat conductivity probe (6) penetrates through the wire through holes.
3. The apparatus for measuring the thermal conductivity of frozen soil according to claim 1, wherein the pressing assembly comprises a pressing plate (7), the pressing plate (7) is matched with the detection groove (5) in size, a piston rod of an electric cylinder (8) is fixedly connected to the upper end of the pressing plate (7), the electric cylinder (8) is fixedly connected to the top plate (3), and a driving circuit of the electric cylinder (8) is connected with the control box (4).
4. A device for measuring frozen soil heat conductivity according to claim 3, wherein a telescopic guide post (9) is provided on each side of the piston rod of the electric cylinder (8), and the telescopic guide post (9) is fixedly connected between the top plate (3) and the pressurizing plate (7).
5. The device for measuring the heat conductivity of the frozen soil according to claim 1, wherein a cover (10) is detachably and fixedly connected to the upper end of the temperature control box (1), and a through hole matched with the electric cylinder (8) or the piston rod and the telescopic guide post (9) is reserved on the cover (10).
6. The device for measuring the heat conductivity of the frozen soil according to claim 1, wherein a sliding chute (11) is arranged in one side of the detection groove (5), sliding holes (12) are communicated with both sides of the sliding chute (11), and the two sliding holes respectively extend to the surfaces of the inner wall and the outer wall of the detection groove (5).
7. The apparatus for measuring the thermal conductivity of frozen earth according to claim 1, wherein the squeeze adjusting assembly comprises an upper slider (13), a lower slider (14) and a screw (15), the upper slider (13) and the lower slider (14) are both slidably connected to the chute (11); a first connecting block (16) is fixedly connected to one side wall of the upper sliding block (13), the first connecting block (16) penetrates through one sliding hole (12) and is fixedly connected to the side wall of the pressurizing plate (7), an accommodating groove (17) is formed in the lower surface of the upper sliding block (13), one end of a pressure spring (18) is fixedly connected to the bottom of the accommodating groove (17), the other end of the pressure spring (18) is fixedly connected with a movable seat (19), and a metal plate (20) is fixedly connected to the lower end of the movable seat (19); a second connecting block (21) is fixedly connected to one side wall of the lower sliding block (14), the second connecting block (21) penetrates through one sliding hole (12) and is fixedly connected with a nut seat (22), a first electric contact point (23) and a second electric contact point (24) are fixedly connected to the upper end of the lower sliding block (14), the lower sliding block (14) is an insulating block, and the first electric contact point (23) and the second electric contact point (24) are electrically connected with a trigger in the control box (4); the two ends of the screw rod (15) are rotatably connected with screw rod fixing seats (25), the screw rod fixing seats (25) are fixedly connected to the surface of the outer wall of the detection groove (5), the screw rod (15) is in threaded connection with the nut seat (22), and the upper end of the screw rod (15) is fixedly connected with a rocking handle (26).
8. The device for measuring the heat conductivity of the frozen soil according to claim 7, wherein a first limit ring (27) is fixedly connected to the opening of the accommodating groove (17), and a second limit ring (28) is fixedly connected to the upper end of the outer peripheral wall of the movable seat (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021338526.8U CN212459487U (en) | 2020-07-09 | 2020-07-09 | Device for measuring heat conductivity coefficient of frozen soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021338526.8U CN212459487U (en) | 2020-07-09 | 2020-07-09 | Device for measuring heat conductivity coefficient of frozen soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212459487U true CN212459487U (en) | 2021-02-02 |
Family
ID=74490183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021338526.8U Expired - Fee Related CN212459487U (en) | 2020-07-09 | 2020-07-09 | Device for measuring heat conductivity coefficient of frozen soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212459487U (en) |
-
2020
- 2020-07-09 CN CN202021338526.8U patent/CN212459487U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
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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: 20210202 Termination date: 20210709 |
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| CF01 | Termination of patent right due to non-payment of annual fee |