CN2532459Y - Titrimeter - Google Patents

Abstract

The utility model which belongs to the liquid measuring device relates to a titration apparatus. In the structure of the titration apparatus, a staff guage panel is arranged at the upper part of a middle cannula and the staff guage panel is in rotation match with the middle cannual; the outer wall of a mandril is provided with outside thread and a lengthways guide limit way; a positioning spacer pin is radially fixed on the staff guage panel, and the front end of the positioning spacer pin is inserted into the guide limit way; a pair of movable screw teeth matched with the outside thread of the mandril are arranged on the side wall of an inner hole of the middle cannual, wherein one movable screw tooth is arranged on the front end of an regulating knob and can move along with the knob forward and backward, and the other movable screw tooth is pressed on the outside screw of the mandril through a pressure spring at the tail of the movable screw tooth; a radial and movable spacer pin is arranged on the base body of the middle manual wall, and the front end of the movable spacer pin can be inserted into the guide limit way of the mandril. The utility model has high precision in titration and liquid moving, and little influence by operational errors.

Description

Titrator

Technical field

The utility model belongs to liquid metering device, relates to a kind of titrator.

Background technology

Existing titration, liquid-transfering device, general utility functions are more single, titration, the precision of moving liquid are lower, and the error of titration, the operation that moves operator in the process of liquid, range estimation to titration, move liquid the precision influence very big.In addition environment temperature to titration, move the liquid precision influence also bigger.

Summary of the invention

Technical problem to be solved in the utility model is, a kind of titration is provided, move liquid the precision height, be subjected to operate miss to influence little titrator.

Titrator of the present utility model includes liquid storage pipe that is positioned at the lower end and the middle sleeve that is fixedly connected with the liquid storage pipe upper end, there is a piston to cooperate with liquid storage pipe, between piston tail and the middle sleeve intracavity bottom stage clip is installed, there is a push rod that is through in the middle sleeve piston top.On middle sleeve top a scale dish is installed, is rotatably assorted between scale dish and the middle sleeve, the scale dish can be rotated on middle sleeve; On the described push rod outer wall external thread is arranged, on the push rod outer wall, also has a guide and limit groove longitudinally, on the scale dish, radially be fixed with a fixedly spacer pin, fixedly the front end of spacer pin just is inserted in the above-mentioned guide and limit groove, push rod can together be rotated with the scale dish, and fixedly spacer pin can be made linear relative movement in the guide and limit groove simultaneously; On the sidewall of middle sleeve endoporus, have a pair of through hole radially, the movable thread of the threads engaged on a pair of and the push rod is installed in radial direction through hole, one of them movable thread is installed in an adjusting knob front end, can be with action before and after the adjusting knob, another movable thread is crushed on the screw thread of push rod by the stage clip of its afterbody; In addition, a movable spacer pin radially is installed also on the tube wall matrix of described middle sleeve, the front end of movable spacer pin can insert in the guide and limit groove on the push rod.For reducing the error in dipping that temperature variation is brought, with further raising precision, a temperature compensation means also is installed on the middle sleeve outer wall, this device comprises the chute of one section circumferencial direction, the pedestal of metering pointer is installed in the chute, and can be along the left and right slip of chute, the scale on the scale dish is pointed in the upper end of metering pointer, and the temperature scale that is positioned on the middle sleeve outer wall is pointed in its lower end.

The utility model has improved the titration precision greatly owing to control vertically moving of push rod by the threaded engagement anglec of rotation between push rod and the thread, has reduced operate miss.And the structure of movable thread makes the utility model can carry out high-precision repetition liquid feeding easily and moves liquid.In addition, temperature compensation means has also further improved measuring accuracy.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the side direction structural representation of Fig. 1;

Fig. 3 is the structural representation of temperature compensation means.

Embodiment

As shown in Figure 1 and Figure 2, titrator of the present utility model lower end is that liquid storage pipe 1, liquid storage pipe upper end connect with middle sleeve 2, and piston 3 cooperates with liquid storage pipe, and stage clip 4 is installed between piston and the middle sleeve, and the piston top is a push rod 5.On middle sleeve 2 tops a scale dish 6 is installed, cooperates by ball between scale dish and the middle sleeve, the scale dish can be rotated on middle sleeve; On push rod 5 outer walls external thread 7 is arranged, on the push rod outer wall, also has a guide and limit groove 8 longitudinally, on the scale dish, radially be fixed with a fixedly spacer pin 9, fixedly the front end of spacer pin is inserted in the guide and limit groove 8, push rod 5 can together rotate with scale dish 6, and fixedly spacer pin 9 can be made linear relative movement in guide and limit groove 8 simultaneously; On the sidewall of middle sleeve endoporus, have a pair of through hole radially, the movable thread 10 of the threads engaged on a pair of and the push rod is installed in radial direction through hole, one of them movable thread is installed in adjusting knob 11 front ends, can be with action before and after the adjusting knob, another movable thread is crushed on the screw thread 7 of push rod by the stage clip 12 of its afterbody; In addition, a movable spacer pin 13 radially is installed also on the tube wall matrix of middle sleeve 2, the front end of movable spacer pin can insert in the guide and limit groove 8 on the push rod.When carrying out titration operation, two movable threads 10 all stretch into the middle sleeve endoporus, engage with push rod screw thread 7, and the movable spacer pin 13 on the middle sleeve leaves the guide and limit groove, at this moment, rotation scale dish 6 rotates push rod 5 thereupon, and upper and lower motion, the scale dish push rod that whenever rotates a circle moves a pitch, thereby can accurately control titration process; When needs move liquid and repeat the liquid feeding operation, make the movable thread of a side break away from the screw thread 7 of push rod by adjusting knob 11, simultaneously movable spacer pin 13 front ends on the middle sleeve are inserted in the guide and limit groove 8 of push rod, push rod can't rotate, at this moment, whenever press push rod once, can the movable thread by stage clip 12 pressure holdings of opposite side is extrapolated, the push rod pitch that can descend can realize high-precisionly moving liquid and repeating the liquid feeding operation thus.

As shown in Figure 3, a temperature compensation means also is installed on middle sleeve 2 outer walls, this device comprises the chute 14 of one section circumferencial direction, the pedestal of metering pointer 15 is installed in the chute 14, and can be along the left and right slip of chute, the scale on the scale dish 6 is pointed in the upper end of metering pointer, and the temperature scale 16 that is positioned on the middle sleeve outer wall is pointed in its lower end.When temperature variation, will measure pen travel to the relevant position, simultaneously with scale dish also rezeroing thereupon, get final product the error in dipping that compensates causes.

Claims (2)

1, a kind of titrator, include liquid storage pipe (1) that is positioned at the lower end and the middle sleeve (2) that is fixedly connected with the liquid storage pipe upper end, there is a piston (3) to cooperate with liquid storage pipe, stage clip (4) is installed between piston tail and the middle sleeve intracavity bottom, there is a push rod (5) that is through in the middle sleeve piston top, it is characterized in that: on middle sleeve (2) top a scale dish (6) is installed, is rotatably assorted between scale dish and the middle sleeve; External thread (7) is arranged on the outer wall of described push rod (5), also have a guide and limit groove (8) longitudinally on the push rod outer wall, radially be fixed with a fixedly spacer pin (9) on the scale dish, fixedly the front end of spacer pin is inserted in the guide and limit groove (8); On the sidewall of middle sleeve (2) endoporus, have a pair of through hole radially, the movable thread (10) that screw thread (7) a pair of and on the push rod matches is installed in radial direction through hole, one of them movable thread is installed in an adjusting knob (11) front end, can be with action before and after the adjusting knob, another movable thread is crushed on the screw thread (7) of push rod by the stage clip (12) of its afterbody; A movable spacer pin (13) radially also is installed on the tube wall matrix of middle sleeve (2), and the front end of movable spacer pin can insert in the guide and limit groove (8) on the push rod.

2, titrator according to claim 1, it is characterized in that: a temperature compensation means also is installed on the middle sleeve outer wall, this device comprises the chute (14) of one section circumferencial direction, the pedestal of metering pointer (15) is installed in the chute, it can be along the left and right slip of chute, the scale on the scale dish (6) is pointed in the upper end of metering pointer, and the temperature scale (16) that is positioned on the middle sleeve outer wall is pointed in its lower end.

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