CN205209449U - Adjust immersion ultrasonic measurement device in measured flow way clearance - Google Patents

Abstract

The utility model discloses an adjust immersion ultrasonic measurement device in measured flow way clearance, but including measuring head and controllable pitch device, the measuring head includes the measuring head body, at the tip of measuring head body, radially sets up a slit runner that makes the fuse -element pass through along it, has seted up the probe passageway in one side of slit runner, is equipped with the buffer beam of taking the coating in the probe passageway, fixed mounting ultrasonic probe in the buffer beam, but the buffer beam is fixed on controllable pitch device, but is equipped with displacement sensor on the controllable pitch device, but controllable pitch device drives the buffer beam and along probe passageway axial motion, realizes that ultrasonic probe is adjustable for the distance of the radial direction of slit runner. Carry out the ultrasonic measurement in -process at polymer melt, the restriction of present mould physics width has been broken through to this device, has expanded probe test region. Can study the polymer and pack granule size and the dispersion action of system fuse -element in different runners, have the meaning of reality to the technical development of polymer processing engineering.

Description

An Immersion Ultrasonic Measuring Device for Adjusting and Measuring the Channel Gap

technical field

The utility model relates to the technical field of polymer ultrasonic testing, in particular to an immersion-type ultrasonic measuring device for adjusting the gap of a measuring flow channel.

Background technique

Due to the needs of molding during polymer processing and molding, certain particles are usually added as reinforcing components during the flow of the polymer melt to improve the product performance of the molding material and reduce costs. However, the polymer melt components The influence of the microstructure such as the dispersed state will eventually affect the macroscopic properties such as the size, shape, and physical properties of the polymer product. How to understand the dispersion state, and adjust the process in time according to the existing dispersion state, and feedback the actual production parameters at the first time, so that the staff can adjust the preset process parameters in time, reduce the rate of defective products and scrap products, thereby reducing unnecessary energy Loss and waste of resources, to achieve the purpose of environmental protection and energy saving, is the key to the polymer processing process, which is still under study. The traditional ultrasonic online measurement method is only to fix the probe on the die, measure the acoustic parameters, and use these parameters to calculate the flow and dispersion state of the enhanced particles in the melt. However, due to the high viscosity of the polymer and the accuracy of the probe As a result, the collected ultrasonic signal cannot reflect the local dispersion state, and the measured data is not satisfactory, which ultimately brings difficulties to process adjustment. Therefore, developing an ultrasonic measurement device that can adjust the gap of the measurement channel to detect a local area has great development prospects.

Contents of the invention

The purpose of the utility model is to overcome the shortcomings and deficiencies of the above-mentioned prior art, and provide an immersion ultrasonic measuring device for adjusting the gap of the measuring flow channel. The utility model provides a detection scheme for the detection of particle size dispersion of polymer-enhanced particles, and solves the problem that in the current polymer processing field, it is impossible to quantitatively characterize the dispersibility of polymer-based composite materials in real time, especially the local dispersibility.

The utility model is realized through the following technical solutions:

An immersion ultrasonic measuring device for adjusting the gap of the measuring flow channel, including a measuring head I and an adjustable distance device II;

The measuring head 1 includes a measuring head body 3. At the end of the measuring head body 3, there is a slit flow channel 1 for the melt to pass through in the radial direction, and a probe channel is opened on one side of the slit flow channel 1. , the probe channel is provided with a buffer rod 2 with a cladding layer, and the ultrasonic probe 4 is fixedly installed in the buffer rod 2; the axis of the probe channel is perpendicular to the axis of the slit flow channel 1;

The buffer rod 2 is fixed on the adjustable distance device II, and the adjustable distance device II is provided with a displacement sensor 6; the adjustable distance device II drives the buffer rod 2 to move axially along the probe channel, so as to realize the ultrasonic probe 4 relative to the slit flow channel. 1 The distance in the radial direction is adjustable.

The cross-sectional shape of the slit channel 1 is rectangular.

The adjustable distance device II includes an upper base 9-1, a base 9, a servo motor 11 installed on the base 9, a screw mandrel 14 installed on the rotating shaft of the servo motor 11 through a shaft coupling 13, a screw mandrel installed on the screw mandrel 14. The screw nut 7 is installed on the guide rail 8 between the upper seat 9-1 and the base 9, and the two sides of the screw nut 7 are slidingly connected with the guide rail 8; the displacement sensor 6 is installed on the screw nut 7;

When the servo motor 11 drives the screw rod 14 to rotate, the screw nut 7 moves axially along the screw rod 14, drives the displacement sensor 6 and the buffer rod 2 to move along its axial direction, and obtains the ultrasonic probe 4 relative to the slit through the displacement sensor 6. The distance data in the radial direction of the flow channel 1 is the distance from the inner wall of the slit flow channel 1 on the other side opposite to the ultrasonic probe 4 .

The ultrasonic probe 4 is fixedly installed on the end of the buffer rod 2 .

The ultrasonic probe 4 is connected to an external ultrasonic transmitting/receiving device, and the ultrasonic transmitting/receiving device is connected to a computer through a cable.

The cladding layer of the buffer rod 2 is a stainless steel tube. A thrust bearing 12 is installed on the coupling 13 . The adjustable distance device II also includes a cover 10 .

Insert the measuring head body 3 into the polymer melt, and the polymer melt enters from one end of the slit flow channel 1 and then flows out from the other end; when the servo motor 11 drives the screw rod 14 to rotate, the nut 7 moves along the wire The axial movement of the rod 14 drives the displacement sensor 6 and the buffer rod 2 to move along its axial direction;

The ultrasonic probe is connected with the ultrasonic transmitting/receiving device and the computer through the probe line, and the computer controls the frequency and intensity of the ultrasonic transmitting/receiving device; the ultrasonic signal is emitted by the ultrasonic transmitting/receiving device and injected into the polymer melt through the ultrasonic probe. The polymer melt propagates inside and reaches the inner wall surface on the other side of the slit channel opposite to the ultrasonic probe 4. After being reflected, it is transmitted again through the buffer rod and received by the ultrasonic probe. The received signal passes through the data acquisition and processing system and is substituted into the model. The dispersibility index of the enhanced particle of the tested polymer melt is calculated to realize the real-time measurement of the particle size distribution.

Compared with the prior art, the utility model has the following advantages and effects:

In the utility model, at the end of the measuring head body, there is a slit flow channel for the melt to pass along the radial direction, and a probe channel is provided on one side of the slit flow channel, and a cladding layer is arranged in the probe channel. A buffer rod, the ultrasonic probe is fixedly installed in the buffer rod; the axis of the probe channel is perpendicular to the axis of the slit flow channel;

The buffer rod is fixed on the adjustable distance device, and the adjustable distance device is equipped with a displacement sensor; the adjustable distance device drives the buffer rod to move axially along the probe channel, so that the distance of the ultrasonic probe relative to the radial direction of the slit flow channel can be adjusted , so that the width of the ultrasonic measurement slit flow channel can be adjusted in real time, and the ultrasonic measurement of the multi-phase polymer melt and its composite material melt can be realized.

When the servo motor drives the screw to rotate, the nut moves along the axial direction of the screw, which drives the displacement sensor and the buffer rod to move along its axial direction, and obtains the distance data of the ultrasonic probe relative to the radial direction of the slit flow channel through the displacement sensor , that is, the distance from the inner wall surface on the other side of the slit channel opposite to the ultrasonic probe. Driven by a servo motor, the screw rod realizes the precise movement and positioning of the ultrasonic probe.

The utility model provides a detection means for the detection of particle size dispersion of polymer reinforced particles, and solves the problem that the current field of polymer processing cannot quantitatively characterize the dispersibility of polymer-based composite material reinforced particles, especially the local dispersibility.

The buffer bar adopted by the utility model has strong broadcast guiding ability and strong received signal. The adjustable distance device realizes the precise control of the ultrasonic probe, which breaks through the limitation of the space of the mold flow channel. In the actual production process, the distance of the ultrasonic probe relative to the radial direction of the slit flow channel can be adjusted according to the actual situation.

Description of drawings

Fig. 1 is the structural representation of the utility model.

FIG. 2 is an enlarged schematic diagram of the structure of the measuring head I in FIG. 1 .

detailed description

Below in conjunction with specific embodiment the utility model is described in further detail.

Example

As shown in Figure 1 and 2. The utility model is an immersion ultrasonic measuring device for adjusting and measuring the gap of a flow channel, which includes a measuring head I and an adjustable distance device II;

The measuring head 1 includes a measuring head body 3. At the end of the measuring head body 3, there is a slit flow channel 1 for the melt to pass through in the radial direction, and a probe channel is opened on one side of the slit flow channel 1. , the probe channel is provided with a buffer rod 2 with a cladding layer, and the ultrasonic probe 4 is fixedly installed in the buffer rod 2; the axis of the probe channel is perpendicular to the axis of the slit flow channel 1;

The buffer rod 2 is fixed on the adjustable distance device II, and the adjustable distance device II is provided with a displacement sensor 6; the adjustable distance device II drives the buffer rod 2 to move axially along the probe channel, so as to realize the ultrasonic probe 4 relative to the slit flow channel. 1 The distance in the radial direction is adjustable.

The cross-sectional shape of the slit channel 1 is rectangular. When measuring, the measuring head body 3 is extended into the polymer melt, and the polymer melt enters from one end of the slit channel 1 and then flows out from the other end.

The adjustable distance device II includes an upper base 9-1, a base 9, a servo motor 11 installed on the base 9, a screw mandrel 14 installed on the rotating shaft of the servo motor 11 through a shaft coupling 13, a screw mandrel installed on the screw mandrel 14. The screw nut 7 is installed on the guide rail 8 between the upper seat 9-1 and the base 9, and the two sides of the screw nut 7 are slidably connected with the guide rail 8; the displacement sensor 6 is installed on the screw nut 7; when the servo motor 11 drives the screw mandrel 14 When rotating, the screw nut 7 moves axially along the screw rod 14, drives the displacement sensor 6 and the buffer rod 2 to move along its axial direction, and obtains the radial distance of the ultrasonic probe 4 relative to the slit flow channel 1 through the displacement sensor 6 The data, that is, the distance from the inner wall surface of the other side of the slit channel 1 opposite to the ultrasonic probe 4 .

The guide rail is used to support and guide the screw pair during work.

The self-locking function of the screw rod is used to withstand the axial pressure from the melt under high pressure test conditions, so that the probe remains still during the measurement process.

The ultrasonic probe 4 is fixedly installed on the end of the buffer rod 2 .

The ultrasonic probe 4 is connected to an external ultrasonic transmitting/receiving device, and the ultrasonic transmitting/receiving device is connected to a computer through a cable.

The buffer rod 2 has a stainless steel coating.

A thrust bearing 12 is installed on the coupling 13 .

The adjustable distance device II also includes a cover 10 .

When measuring, extend the measuring head body 3 vertically into the die head with polymer melt flowing and conveying, the polymer melt enters from one end of the slit flow channel 1, and then flows out from the other end; start the servo motor 11, and open Displacement sensor 6; through the displacement displayed by the displacement sensor 6, the ultrasonic probe 4 is controlled at a proper position, and the servo motor 11 is turned off. Add the materials to be tested and additives into the extruder, and the materials start to melt and mix. At this time, the self-locking function of the screw rod 14 keeps the ultrasonic probe 4 stationary in the high-voltage test environment. The guide rail 8 supports the screw rod and moves the screw nut at the same time. Conduct guidance to prevent it from rotating in the plane, so as to keep the ultrasound probe moving in a straight line.

After the material is melted evenly, turn on the ultrasonic transmitting/receiving device, start the test, and turn off the power until the end of the test.

The device breaks through the limitation of the physical width of the existing mould, and expands the testing area of the ultrasonic probe. Being able to study the particle size and dispersion behavior of polymer filling system melt in different flow channels has practical significance for the technical development of polymer processing engineering.

As mentioned above, the utility model can be better realized.

The implementation of the present utility model is not limited by the above-mentioned examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present utility model should be equivalent replacement methods. Included within the protection scope of the present utility model.

Claims (8)

1. An immersion type ultrasonic measuring device for adjusting the measurement channel gap, characterized in that: comprising a measuring head (I) and an adjustable distance device (II); The measuring head (1) includes a measuring head body (3), at the end of the measuring head body (3), there is a slit flow channel (1) for the melt to pass through along its radial direction, and in the slit flow channel One side of (1) is provided with probe passage, is provided with the buffer rod (2) with covering layer in probe passage, and ultrasonic probe (4) is fixedly installed in buffer rod (2); The axis of described probe passage and slit The axes of the runners (1) are perpendicular to each other; The buffer rod (2) is fixed on the adjustable distance device (II), and the adjustable distance device (II) is provided with a displacement sensor (6); the adjustable distance device (II) drives the buffer rod (2) along the axial direction of the probe channel The movement realizes the adjustable distance of the ultrasonic probe (4) relative to the radial direction of the slit channel (1). 2. The immersion ultrasonic measuring device for adjusting the gap of the measurement flow channel according to claim 1, characterized in that: the cross-sectional shape of the slit flow channel (1) is a rectangle. 3. The immersion ultrasonic measuring device for adjusting and measuring the channel gap according to claim 1 or 2, characterized in that: the adjustable distance device (II) includes an upper seat (9-1), a base (9), a mounting The servo motor (11) on the base (9), the screw mandrel (14) installed on the rotating shaft of the servo motor (11) through the coupling (13), the screw nut (7) installed on the screw mandrel (14) , installed on the guide rail (8) between the upper seat (9-1) and the base (9), the two sides of the nut (7) are slidingly connected with the guide rail (8); the displacement sensor (6) is installed on the nut (7) )superior; When the servo motor (11) drives the screw rod (14) to rotate, the screw nut (7) moves axially along the screw rod (14), drives the displacement sensor (6) and the buffer rod (2) to move along its axial direction, and The distance data of the ultrasonic probe (4) relative to the radial direction of the slit flow channel (1) is obtained by the displacement sensor (6), that is, the distance data of the inner wall surface of the other side of the slit flow channel (1) opposite to the ultrasonic probe (4) distance. 4. The immersion ultrasonic measuring device for adjusting and measuring the gap of the flow channel according to claim 1, characterized in that: the ultrasonic probe (4) is fixedly installed at the end of the buffer rod (2). 5. The immersion ultrasonic measuring device for adjusting and measuring the flow channel gap according to claim 3, characterized in that: the ultrasonic probe (4) is connected to an external ultrasonic transmitting/receiving device, and the ultrasonic transmitting/receiving device is connected by a cable computer. 6. The immersion type ultrasonic measuring device for adjusting and measuring the gap of the measuring channel according to claim 1, characterized in that: the buffer rod (2) has a stainless steel cladding layer. 7. The immersion type ultrasonic measuring device for adjusting and measuring the gap of flow passages according to claim 3, characterized in that: a thrust bearing (12) is installed on the coupling (13). 8. The immersion ultrasonic measuring device for adjusting the gap of the measuring channel according to claim 3, characterized in that: the adjustable distance device (II) further comprises a cover (10).