Adjustable quantitative liquid taking device

Abstract

The utility model relates to the technical field of liquid taking devices, and discloses an adjustable quantitative liquid taking device which comprises a liquid taking cylinder, a piston rod and a positioner, a liquid taking opening is formed in the front end of the liquid taking cylinder, one end of the piston rod is located in the liquid taking cylinder, the other end of the piston rod extends out of the liquid taking cylinder, and the piston rod is in sliding fit with the liquid taking cylinder; the positioner comprises screw rods, a positioning ruler and a positioning frame, the screw rods and the positioning ruler are fixed at the other end of the liquid taking cylinder in the length direction of the liquid taking cylinder, the positioning ruler is located between the two screw rods, the screw rods and the positioning ruler are parallel to each other, the positioning ruler sequentially penetrates through the piston rod and the positioning frame, and the positioning frame is fixed on the piston rod. The positioning frame is rotationally connected with two nuts, and the nuts are in threaded connection with the corresponding screws; the adjustable quantitative liquid taking device provided by the utility model solves the problems that the manual operation of the piston rod is not easy to control and the liquid taking amount is inaccurate, and can also be used for quantitative sampling in a high-pressure state.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid taking device technical field, concretely relates to an adjustable quantitative liquid taking device. BACKGROUND

[0002] The existing liquid taking device adopts manual operation push-pull handle, and realizes the extraction of different liquid amounts by controlling the push-pull degree of the handle, but the push-pull degree of the handle is manually controlled, the accuracy is not high, for some high-value liquid, there is great waste if extracted too much, and it cannot be used for sampling of high-pressure equipment, therefore, how to design an adjustable quantitative liquid taking device with wide pressure range and improved liquid taking accuracy becomes a problem to be solved at present. UTILITY MODEL CONTENTS

[0003] The utility model aims at providing an adjustable quantitative liquid taking device to solve at least one of the above problems in the prior art.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] An adjustable quantitative liquid taking device, comprising a liquid taking cylinder, a piston rod and a positioner, the front end of the liquid taking cylinder is provided with a liquid taking port, one end of the piston rod is located in the liquid taking cylinder, the other end of the piston rod extends out of the liquid taking cylinder, and the piston rod and the liquid taking cylinder are in sliding fit; the positioner comprises a screw rod, a position ruler and a positioning frame, the screw rod and the position ruler are fixed on the other end of the liquid taking cylinder along the length direction of the liquid taking cylinder, the position ruler is located between the two screw rods, the screw rod and the position ruler are parallel to each other, the position ruler passes through the piston rod and the positioning frame in sequence, two nuts are rotatably connected to the positioning frame, the nut is in threaded connection with the corresponding screw rod, the positioning frame is provided with a pointer, the pointer is used for indicating the scale on the position ruler, and the piston rod moves along the position ruler.

[0006] The technical scheme can well realize stable adjustment operation of the positioning frame through the two screw rods, the nuts and the positioning frame, specifically, two nuts are simultaneously rotated, the nuts are rotationally connected with the positioning frame, the nuts are rotated and displaced along with the screw rods, and the nuts drive the positioning frame, the positioning ruler sequentially passes through the piston rod and the positioning frame, the positioning frame is provided with a pointer, the pointer is used for indicating the scale on the positioning ruler, the indicating position of the pointer on the positioning ruler can be observed during movement of the positioning frame, and the positioning frame is moved to a specific scale position indicated by the pointer, the position of the positioning frame is fixed through simple operation, the position of the positioning frame is not changed after being fixed, and the piston rod is moved to take liquid, the piston rod is moved along the positioning ruler until the end of the piston rod abuts against the positioning frame, the maximum movement position of the piston rod is limited by the positioner, the liquid taking amount can be accurately controlled, and the problem that the liquid taking amount is not accurate due to human operation of the piston rod is solved.

[0007] Further, in order to facilitate cooperation with the positioning ruler, one end of the piston rod located outside the liquid taking cylinder is provided with an operation part, and the positioning ruler is in sliding cooperation with the operation part.

[0008] Further, in order to facilitate installation of the two nuts, the positioning frame comprises a left mounting position and a right mounting position, and the left mounting position and the right mounting position are respectively rotationally connected with the nuts.

[0009] Further, in order to facilitate the pointer to point to the positioning ruler, the pointer is arranged between the left mounting position and the right mounting position.

[0010] Further, in order to improve stability of the screw rod and the positioning ruler, the positioner comprises an end plate, and the end plate is fixedly connected with the end portions of the two screw rods and the positioning ruler.

[0011] Further, in order to facilitate manual operation of the nut, the positioning frame is a rectangular frame body, the rectangular frame body is provided with an open end at the front end and the rear end, and the edge of the nut exceeds the open end.

[0012] The utility model discloses an advantageous effect is: the technical scheme, through two screw rods, nut and the setting of positioning frame can be well realized to the adjustment stable adjustment operation of positioning frame, specific, simultaneously operating two nuts rotates, because the nut is rotated with positioning frame connection, the nut is in the rotation and displacement along with screw rod, also realized the drive to positioning frame, because the positioning ruler passes through piston rod and positioning frame in proper order, be equipped with the pointer on the positioning frame, and the pointer is used to indicate the scale on the positioning ruler, can be through the observation pointer's indicating position on the positioning ruler in the process of positioning frame movement, until positioning frame moves to the specific scale position that the pointer indicates. The technical scheme can realize the position fixation of positioning frame through simple operation, and the positioning frame position is fixed and can not change, then through the process of taking liquid that piston rod moves, because piston rod moves along the positioning ruler until the end of piston rod and positioning frame abut, then the maximum moving position of piston rod is limited by the positioner, can accurately control the liquid taking amount, thereby solve the problem that the liquid taking amount is not accurate that human operation piston rod is not easy to control. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is the structural schematic diagram of the utility model;

[0014] Fig. 2 It is the front view structural schematic diagram of the utility model;

[0015] Fig. 3 It is the sectional view structural schematic diagram of the utility model.

[0016] In the drawing: liquid taking cylinder 1;Piston rod 2;Liquid taking mouth 3;Screw rod 4;Positioning ruler 5;Positioning frame 6;Nut 7;Pointer 8;Operation part 9;Left side installation site 10;Right side installation site 11;End plate 12. DETAILED DESCRIPTION

[0017] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the utility model will be briefly introduced with the description of embodiment or prior art and accompanying drawing, obviously, the following description of the structure of accompanying drawing is only some embodiments of the utility model, for the ordinary skill in the art, under the premise of not paying creative labor, still can obtain other accompanying drawings according to these accompanying drawings. It needs to be explained here that the explanation of these embodiment modes is used to help understanding the utility model, but does not constitute the limitation of the utility model.

[0018] Embodiment 1:

[0019] As Figs. 1-3As shown, the embodiment provides an adjustable liquid taking device, which comprises a liquid taking cylinder 1, a piston rod 2 and a positioner. The front end of the liquid taking cylinder 1 is provided with a liquid taking opening 3. One end of the piston rod 2 is located in the liquid taking cylinder 1, and the other end of the piston rod 2 extends out of the liquid taking cylinder 1. The piston rod 2 is in sliding fit with the liquid taking cylinder 1. The positioner comprises a screw rod 4, a positioning scale 5 and a positioning frame 6. The screw rod 4 and the positioning scale 5 are fixed at the other end of the liquid taking cylinder 1 along the length direction of the liquid taking cylinder 1. The positioning scale 5 is located between the two screw rods 4. The screw rod 4 and the positioning scale 5 are parallel to each other. The positioning scale 5 passes through the piston rod 2 and the positioning frame 6 in sequence. Two nuts 7 are rotatably connected to the positioning frame 6. The nut 7 is in threaded connection with the corresponding screw rod 4. The positioning frame 6 is provided with a pointer 8. The pointer 8 is used for indicating the scale on the positioning scale 5. The piston rod 2 moves along the positioning scale 5.

[0020] The two screw rods 4, the nuts 7 and the positioning frame 6 are arranged to realize stable adjustment operation of the positioning frame 6. Specifically, the two nuts 7 are simultaneously operated to rotate. Since the nut 7 is rotatably connected to the positioning frame 6, the nut 7 is rotated and displaced along with the screw rod 4, and the positioning frame 6 is driven. Since the positioning scale 5 passes through the piston rod 2 and the positioning frame 6 in sequence, the positioning frame 6 is provided with the pointer 8, and the pointer 8 is used for indicating the scale on the positioning scale 5. During the movement of the positioning frame 6, the indicating position of the pointer 8 on the positioning scale 5 can be observed until the positioning frame 6 moves to the specific scale position indicated by the pointer 8. The position of the positioning frame 6 can be fixed by simple operation. The position of the positioning frame 6 will not change after being fixed. During the movement of the piston rod 2 for taking liquid, the piston rod 2 moves along the positioning scale 5 until the end of the piston rod 2 abuts against the positioning frame 6. Therefore, the maximum movement position of the piston rod 2 is limited by the positioner, and the liquid taking amount can be accurately controlled. Thus, the problem that the liquid taking amount is not accurate due to the difficulty in controlling the piston rod 2 by human operation is solved.

[0021] Embodiment 2

[0022] The embodiment is optimized on the basis of the above-described embodiment 1.

[0023] In order to facilitate the cooperation with the positioning scale 5, one end of the piston rod 2 located outside the liquid taking cylinder 1 is provided with an operation part 9. The positioning scale 5 is in sliding fit with the operation part 9.

[0024] Embodiment 3

[0025] The embodiment is optimized on the basis of the above-described embodiment 1.

[0026] In order to facilitate the installation of the two nuts 7, the positioning frame 6 comprises a left mounting position 10 and a right mounting position 11. The left mounting position 10 and the right mounting position 11 are respectively rotatably connected with the nuts 7.

[0027] Embodiment 4:

[0028] This embodiment is optimized on the basis of the above-mentioned embodiment 3.

[0029] In order to facilitate the pointer 8 to point to the positioning ruler 5, the pointer 8 is arranged between the left mounting position 10 and the right mounting position 11.

[0030] Embodiment 5:

[0031] This embodiment is optimized on the basis of the above-mentioned embodiment 1.

[0032] In order to improve the stability of the screw rod 4 and the positioning ruler 5, the positioner comprises an end plate 12, and the end portions of the two screw rods 4 and the positioning ruler 5 are fixedly connected with the end plate 12.

[0033] Embodiment 6:

[0034] This embodiment is optimized on the basis of the above-mentioned embodiment 1.

[0035] In order to facilitate manual operation of the nut 7, the positioning frame 6 is a rectangular frame body, the front end and the rear end of the rectangular frame body are provided with openings, and the edge of the nut 7 exceeds the opening.

[0036] Finally, it should be noted that: the above is only the preferred embodiment of the utility model, and is not used for limiting the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An adjustable dosing device, characterized by: The device comprises a liquid taking cylinder, a piston rod and a positioner, the front end of the liquid taking cylinder is provided with a liquid taking opening, one end of the piston rod is located in the liquid taking cylinder, the other end of the piston rod extends out of the liquid taking cylinder, the piston rod and the liquid taking cylinder are in sliding fit; the positioner comprises a screw rod, a position ruler and a position frame, the screw rod and the position ruler are fixed on the other end of the liquid taking cylinder along the length direction of the liquid taking cylinder, the position ruler is located between the two screw rods, the screw rod and the position ruler are parallel to each other, the position ruler passes through the piston rod and the position frame in sequence, two nuts are rotatably connected on the position frame, the nuts are in threaded connection with the corresponding screw rods, a pointer is arranged on the position frame, the pointer is used for indicating the scale on the position ruler, and the piston rod moves along the position ruler.

2. The adjustable liquid dosing device according to claim 1, characterized in that The end of the piston rod located outside the liquid taking cylinder is provided with an operation part, and the position ruler is in sliding fit with the operation part.

3. The adjustable liquid dosing device according to claim 1, characterized in that: The position frame comprises a left mounting position and a right mounting position, and the left mounting position and the right mounting position are respectively rotatably connected with the nuts.

4. A device according to claim 3, wherein: The pointer is arranged between the left mounting position and the right mounting position.

5. The adjustable liquid dosing device of claim 1, wherein: The positioner comprises an end plate, and the end plate is fixedly connected with the end portions of the two screw rods and the position ruler.

6. The adjustable liquid dosing device of claim 1, wherein: The position frame is a rectangular frame body, the front end and the rear end of the rectangular frame body are provided with openings, and the edges of the nuts exceed the openings.

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