CN202974759U - Digital fixture for cement compressive strength test - Google Patents
Digital fixture for cement compressive strength test Download PDFInfo
- Publication number
- CN202974759U CN202974759U CN 201220747614 CN201220747614U CN202974759U CN 202974759 U CN202974759 U CN 202974759U CN 201220747614 CN201220747614 CN 201220747614 CN 201220747614 U CN201220747614 U CN 201220747614U CN 202974759 U CN202974759 U CN 202974759U
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- CN
- China
- Prior art keywords
- rack
- frame
- fixture
- cement
- compressive strength
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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.)
- Expired - Fee Related
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a cement compressive strength test device, particularly relates to a digital fixture for the cement compressive strength test, and belongs to the field of machines. The digital fixture for the cement compressive strength test comprises a rack and a copper guide sleeve mounted at the upper part of the rack, wherein the copper guide sleeve is mounted inside the rack; a force measurement sensor (2) is mounted at the bottom of the rack, and is fixed on the rack through a bolt (11) at the bottom of the rack and a positioning bolt (10) on the force measurement sensor; a pressure level device (4) consisting of a concave spherical press head (5) and a convex spherical press head (3) is mounted at the upper part of the rack; the concave spherical press head is arranged at the upper part of the convex spherical press head; and guide posts (7) are respectively arranged at the both ends of the upper part of the rack, and are connected with studs (9) arranged at the both ends of the convex spherical press head through springs (8). According to the digital fixture for the cement compressive strength test provided by the utility model, an error of the pressure resistance data caused by introduction of friction force in the traditional fixture measurement process can be avoided by directly placing the force measurement sensor at the lower end of the fixture; and meanwhile, the defect that the former force measurement precision is instable due to the influence of a hydraulic system can be overcome.
Description
Technical field
The utility model relates to a kind of strength of cement test unit, and particularly a kind of digital strength of cement test fixture, belong to mechanical field.
Background technology
The strength of cement testing machine is the cement strength checkout equipment that is widely used in various building quality inspection unit, cement production enterprise and concrete-agitating enterprise, is the important leverage measurement instrument to building trade cement supply basis.And the resistance to compression fixture is the important composition device in the strength of cement test, the error that existing cement resistance to compression fixture is introduced in the strength of cement test is larger, the force value that is read by the pressure testing machine terminal display device is not the suffered actual pressure of glue sand test specimen, mensuration for 28d compressive strength, repeatability between qualified laboratory, represent with the coefficient of variation, even can reach 6%.
The utility model content
According to above the deficiencies in the prior art, the technical problems to be solved in the utility model is: provide a kind of and can overcome defects, the digital strength of cement test fixture that measuring accuracy is high, measuring repeatability good, measuring error is little, simple and reasonable.
The technical scheme that its technical matters that solves the utility model adopts is:
Described digital strength of cement test fixture, comprise frame and the copper guide pin bushing that is arranged on upper rack, the copper guide pin bushing is arranged on frame inside, it is characterized in that: frame bottom installation force cell, force cell is fixed on frame by bolt and the bolt on force cell of frame bottom, upper rack is installed the stress level device that is comprised of recessed ball pressure head and protruding ball pressure head, recessed ball pressure head is arranged on protruding ball pressure head top, the upper rack two ends arrange respectively guide pillar, and guide pillar is connected with the double-screw bolt that is arranged on protruding ball pressure head two ends by spring.
Described digital strength of cement test fixture is by being placed into force cell the fixture lower end, avoided the error due to the friction force introducing, with force cell cut-in pressure testing machine display terminal, can directly show cement style related experiment data simultaneously; Protruding ball pressure head and recessed ball press head group are combined into the stress level device, can be used for keeping testing machine still can vertically exert pressure when the cement briquette upper and lower surface is not parallel; By guide pillar, spring, the stable workplace of exerting pressure when stud cement stone upper and lower surface is not parallel.
Bolt on described force cell is 4, is symmetrical structure and distributes.Symmetrical structure, safety attractive in appearance, bolt is 4, and the left and right respectively arranges 2, and fastness is good.
Described frame is I-shaped.Facilitate all parts installation convenient fixing on frame.
The beneficial effect that the utility model has is: described digital strength of cement test fixture passes through directly with force cell placing clamp lower end, the resistance to compression data are avoided in the conventional brace measuring process error introduced due to friction force, have eliminated simultaneously original dynamometry precision because affected by hydraulic system and have caused unsettled drawback.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model side view;
Fig. 3 is the utility model frame schematic diagram;
In figure: 1, frame 2, force cell 3, protruding ball pressure head 4, stress level device 5, recessed ball pressure head 6, copper guide pin bushing 7, guide pillar 8, spring 9, double-screw bolt 10, bolt 11, bolt.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
as shown in Figure 1, digital strength of cement test fixture, comprise frame 1 and the copper guide pin bushing 6 that is arranged on frame 1 top, copper guide pin bushing 6 is arranged on frame 1 inside, force cell 2 is installed in frame 1 bottom, force cell 2 is fixed on frame 1 by bolt 11 and the bolt 10 on force cell 2 of frame 1 bottom, the stress level device 4 that is comprised of recessed ball pressure head 5 and protruding ball pressure head 3 is installed on frame 1 top, recessed ball pressure head 5 is arranged on protruding ball pressure head 3 tops, frame 1 both upper ends thereof arranges respectively guide pillar 7, guide pillar 7 is connected with the double-screw bolt 9 that is arranged on protruding ball pressure head 3 two ends by spring 8.
Principle of work and use procedure:
the fixing whole cement briquette of cement resistance to compression fixture frame and force cell 2, force cell 2 is whole digital cement resistance to compression fixture cores, cement briquette is exported measured pressure value in compression test, protruding ball pressure head 3 and recessed ball pressure head 5 are combined as the stress level device, be used for keeping testing machine still can vertically exert pressure when the cement briquette upper and lower surface is not parallel, copper guide pin bushing 6 is brass ware in frame inside, the uncertainty that the impact that when exerting pressure for reducing testing machine, inwall is caused and reduction friction are introduced, guide pillar 7, spring 8, double-screw bolt 9 is used for the stable workplace of exerting pressure when cement stone upper and lower surface is not parallel, bolt 10 and the common fixedly force cell 2 of bolt 11 are in the position of whole cement resistance to compression fixture frame.
During work, sensor is incorporated in cement resistance to compression fixture frame, directly contact with cement briquette, directly result is derived in cement compression test process, can significantly reduce the uncertainty that the friction force that produces due to mechanical realization and hydraulic system are brought jointly.
Claims (3)
1. digital strength of cement test fixture, comprise frame (1) and be arranged on the copper guide pin bushing (6) on frame (1) top, copper guide pin bushing (6) is arranged on frame (1) inside, it is characterized in that: frame (1) bottom installation force cell (2), force cell (2) is fixed on frame (1) by bolt (11) and the bolt (10) on force cell (2) of frame (1) bottom, the stress level device (4) that is comprised of recessed ball pressure head (5) and protruding ball pressure head (3) is installed on frame (1) top, recessed ball pressure head (5) is arranged on protruding ball pressure head (3) top, frame (1) both upper ends thereof arranges respectively guide pillar (7), guide pillar (7) is connected with the double-screw bolt (9) that is arranged on protruding ball pressure head (3) two ends by spring (8).
2. digital strength of cement test fixture according to claim 1, it is characterized in that: the bolt (10) on described force cell (2) is 4, is symmetrical structure and distributes.
3. digital strength of cement test fixture according to claim 1 is characterized in that: described frame (1) is for I-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220747614 CN202974759U (en) | 2012-12-29 | 2012-12-29 | Digital fixture for cement compressive strength test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220747614 CN202974759U (en) | 2012-12-29 | 2012-12-29 | Digital fixture for cement compressive strength test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202974759U true CN202974759U (en) | 2013-06-05 |
Family
ID=48515817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220747614 Expired - Fee Related CN202974759U (en) | 2012-12-29 | 2012-12-29 | Digital fixture for cement compressive strength test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202974759U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728192A (en) * | 2013-12-20 | 2014-04-16 | 吴江市震宇缝制设备有限公司 | Method for detecting internal hardness of steel balls |
| CN104483191A (en) * | 2014-12-30 | 2015-04-01 | 长安大学 | Cement compression resistance clamp for compression testing machine and usage method of clamp |
-
2012
- 2012-12-29 CN CN 201220747614 patent/CN202974759U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728192A (en) * | 2013-12-20 | 2014-04-16 | 吴江市震宇缝制设备有限公司 | Method for detecting internal hardness of steel balls |
| CN104483191A (en) * | 2014-12-30 | 2015-04-01 | 长安大学 | Cement compression resistance clamp for compression testing machine and usage method of clamp |
| CN104483191B (en) * | 2014-12-30 | 2017-11-14 | 长安大学 | A kind of pressure testing machine concrete compression-resistanmodifier fixture and its application method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20131229 |