CN87203430U

CN87203430U - Standard maintaining device for concrete pressure-testing block

Info

Publication number: CN87203430U
Application number: CN 87203430
Authority: CN
Inventors: 马风云
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-07-07
Filing date: 1987-07-07
Publication date: 1988-03-02

Abstract

The utility model relates to a standard maintaining device for a concrete pressure-testing block, comprising a maintaining box, a temperature controller, etc., wherein, the maintaining box is of water tank type and a pressure-testing block is positioned in the water, which not only does not need any humidity measurement and control instrument, but also ensures the requirement of the relative humidity of the maintaining environment. Temperature control adopts two electric contact thermometers and two sets of circuits which achieve the bidirectional temperature control over temperature, ensuring the maintaining temperature within a required scope. The utility model has the advantages of simple structure and low cost, strictly ensuring the requirement of the maintaining environment. The utility model can also be used for other operations which carry out the temperature control treatment in liquids.

Description

Standard maintaining device for concrete pressure-testing block

A kind of physics and chemistry testing tool is especially for the standard curing device of concrete pressure testing piece.

Existing standard curing case is the clothes closet pattern, adopts the refrigeration unit cooling, regulates temperature by the spray of water, does not have Humidity Detection and control device.Therefore, this curing box not only involves great expense, and is difficult for the curing condition of the standard that reaches.

The purpose of this utility model provide a kind of can automatic temperature-control and can guarantee concrete pressure testing piece standard curing case rh value, cheap of standard.

The purpose of this utility model is achieved in that this device comprises curing box, temperature controller, electric contact thermometer, heater, magnetic valve, ball float and adds the water power contact automatically.An amount of water of packing in the curing box is put into water with the pressure testing piece.The relative humidity that has so just guaranteed the maintenance environment is more than 90%.Also be placed with electric contact thermometer A and B in the water, the contact of thermometer A is transferred the upper limit in the control temperature, and the contact of thermometer B is transferred the lower limit in the control temperature, when raising, water temperature reaches going up in limited time of control temperature, connect with the normally opened contact that thermometer A links, the power connection of at this moment lowering the temperature, magnetic valve is opened, running water injects curing box automatically, and water temperature is descended.Connect with the normally-closed contact that thermometer B links in limited time when water temperature drops to the following of control temperature, the power connection that at this moment heats up is placed on the heater starting in the curing box water, and water temperature will raise again.Like this, water temperature just is controlled within the scope of regulation all the time.If water level is low excessively, with the joining water power contact that adds automatically of the ball float on the water surface with auto-closing, start magnetic valve simultaneously, in curing box, add water automatically, on the position that water level is remained on need.The utility model has adopted two electric contact temps to take into account the circuit that comprises electron tube, resistance, electric capacity, contactor, normally opened contact, normally-closed contact and load power source, has realized the two-way control to temperature.

The utility model adopts the water tank type curing box, and the relative humidity that has guaranteed the maintenance environment is more than 90%, and need not use the humidity controller device.Aspect temperature control, adopt the mode of resistance heated and water-cooled cooling, saved refrigeration unit, so simple in structure, cheap.Full machine is controlled automatically, without manually-operated.This device also be applicable to other need be in liquid the operation handled of temperature control.

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is the assembling schematic diagram of a kind of concrete structure of the utility model.

Fig. 2 is the electrical schematic of temperature controller of the present utility model.

Wherein: 1 is power line, and 2 is temperature controller, and 3 are the cooling indication, 4 are the intensification power supply, and 5 are the cooling power supply, and 6 are the indication that heats up, 7 is heater, and 8A is electric contact thermometer A, and 8B is electric contact thermometer B, 9 is magnetic valve, and 10 for adding the water power contact automatically, and 11 is running water pipe, 12 is ball float, 13 is curing box, and 14 is gap, and 15 are the pressure testing piece.

With reference to Fig. 1, pressure testing piece 15 is placed directly in the water in the curing box 13, so both needn't use Humidity Detection and control device, and the relative humidity that has guaranteed pressure testing piece 15 maintenance environment again is more than 90%.The measurement of temperature and control lean on two electric contact thermometer 8A and 8B and temperature controller 2 to realize, the contact of thermometer 8A fixes on the upper limit of control temperature, and the contact of thermometer 8B fixes on the lower limit of control temperature.When being increased to going up of control temperature, water temperature prescribes a time limit, as shown in Figure 2, the normally open contact JK closure that links to each other with electric contact thermometer 8A, cooling power supply 5 is connected, and magnetic valve 9 is opened, and adds water in curing box 13, and water temperature is descended.Reduce to the following of control temperature when water temperature and prescribe a time limit, the normally closed interlock JB closure that links to each other with electric contact thermometer 8B, intensification power supply 4 is connected, and starts heater 7, and water temperature is raise, thereby water temperature is remained within the scope that needs.

Cross when low when water level, the ball float 12 that floats on the surface descends, drive link to each other therewith add water power contact 10 automatically, make it closed, start magnetic valve 9, in trend curing box 13, add water, make the position that water level is increased to be needed.

Fig. 2 is the electrical schematic of temperature controller 2, and it comprises electron tube P, and resistance R, capacitor C, contactor J, normally opened contact JK, normally-closed contact JB, load power source and indicator lamp utilize two electric contact thermometers, have realized the two-way control to temperature.

Claims

1, a kind of standard curing device of concrete pressure testing piece, it comprises curing box 13, temperature controller 2, heater 7, magnetic valve 9, electric contact thermometer 8, ball float 12 and adds water power contact 10 automatically, it is characterized in that:

A, curing box 13 are water tank type, and pressure testing piece 15 directly places the water in the curing box 13;

The circuit that b, employing are carried out two-way control to temperature comprises electron tube P, resistance R, capacitor C, normally opened contact JK, normally-closed contact JB, contactor J, indicator lamp and load power source.