JPH0731892U - Auxiliary nozzle dirt measuring device - Google Patents

Abstract

(57) [Abstract] [Purpose] A device for measuring performance deterioration due to dirt in the nozzle pipe of an auxiliary nozzle used in an air jet loom and in the nozzle hole and the air pipe to the auxiliary nozzle, do not remove the auxiliary nozzle from the loom To obtain a device that can measure accurately. [Structure] A measuring head 4 fitted in the guide groove 2 of the lure 1 from the front side of the lure is provided, and a large number of flow velocity measuring elements 5 are provided on one end surface of the measuring head 4. As the flow velocity measuring element 5, for example, a Pitot tube or a hot wire anemometer is used. In order to determine the direction of the flow velocity measuring element 5 in the guide groove 2, a guide head 6 fitted in the guide groove 2 is provided at a position distant from the measuring head 4 on the upstream side in the weft flying direction. In this case, in order to easily set the distance between the auxiliary nozzle and the measurement point,
It is possible to provide a scale 8 on the connecting member 7 connecting the measuring head 4 and the guide head 6, and also to provide a reference 15 for defining the mounting height of the auxiliary nozzle 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus for measuring performance deterioration due to contamination of a nozzle pipe of an auxiliary nozzle used in an air jet loom, a nozzle hole, and air piping to the auxiliary nozzle.

[0002]

[Prior art]

 The auxiliary nozzles of the air jet loom are arranged side by side at a specified interval along the front surface of the reed, and by jetting air in the weft insertion direction from the tip of the auxiliary nozzle, the weft sent from the main nozzle is ejected to the front of the reed. Fly vigorously along the provided guide groove. Since this auxiliary nozzle is inserted between the warps, it must be made thin, and since its nozzle hole is provided on the tip side of the nozzle pipe, it jets a thin jet in the desired direction without diffusing the air flow. It requires a high level of technology, and requires high accuracy in the processing of nozzle holes.

It has been conventionally measured as shown in FIG. 4 how the auxiliary nozzle used injects air in what direction and with what degree of convergence. That is, the auxiliary nozzle 3 is fixed in front of the measuring device provided with a large number of pitot tubes 5, ..., Each pitot tube 5 when air is supplied to the auxiliary nozzle 3 and air is jetted from the nozzle holes.・ By plotting the flow velocity measured at, the flow velocity of the injection air and its distribution (diffusion state) are measured by drawing an isobar. The performance of such an auxiliary nozzle is measured for the purpose of checking the performance of the auxiliary nozzle before mounting it on the loom.

On the other hand, when the auxiliary nozzle is mounted on a loom and used for a long period of time, fine dust containing water and oil floating in the air passing through the auxiliary nozzle adheres to the nozzle pipe of the auxiliary nozzle and the nozzle hole. Will be deposited. As a matter of course, such accumulation of dirt deteriorates the performance of the auxiliary nozzle and the weft insertion performance. Therefore, in order to measure the deterioration of the performance of the auxiliary nozzle due to such dirt, conventionally, as shown in FIG. 3, air is jetted from the auxiliary nozzle 3 with the loom stopped, and the flow velocity of the air jet is set to It was measured by measuring with one Pitot tube 5 inserted in the guide groove 2. That is, the dirt on the auxiliary nozzle 3 was measured on the basis of a criterion that the flow velocity of the jet air flow due to the dirt attached to the auxiliary nozzle 3 was reduced.

[0005]

[Problems to be solved by the device]

 However, tests conducted by the inventors of the present invention have revealed that the conventional method as shown in FIG. 3 cannot accurately measure the performance deterioration due to the dirt of the auxiliary nozzle 3. That is, it was found that the substantial deterioration of the performance of the auxiliary nozzle 3, that is, the decrease of the weft conveying force cannot be accurately measured only by measuring the flow velocity of the air flow injected from the auxiliary nozzle 3 in the guide groove 2. I did.

Based on the above findings, the present invention aims at obtaining an apparatus capable of accurately measuring performance deterioration due to dirt on the auxiliary nozzle without removing the auxiliary nozzle from the loom.

[0007]

[Means for Solving the Problems]

 According to the results of various tests conducted by the inventor of the present invention to solve the above problems, the substantial deterioration of the performance of the auxiliary nozzle 3 is caused by the guide groove 2 on the front face of the air flow injected from the auxiliary nozzle 3. It was found that more accurate measurements can be made by measuring the flow velocity distribution inside the chamber. Therefore, this device is a device that can easily and accurately measure a substantial performance deterioration due to dirt on the auxiliary nozzle 3 without removing the auxiliary nozzle 3 from the loom. The present invention proposes an apparatus which is provided with a measuring head 4 and which is provided with a large number of flow velocity measuring elements 5 on one end surface of the measuring head 4. As the flow velocity measuring element 5, for example, a hot wire anemometer, a thermistor anemometer, or the like can be used in addition to the Pitot tube shown in the embodiment.

In order to determine the direction of the flow velocity measuring element 5 in the guide groove 2, the length of the measuring head 4 in the guide groove direction is lengthened, or the measuring head 4 is fitted into the guide groove 2 at a position distant from the measuring head 4. The guide head 6 to be mounted is provided, and the measuring head 4 and the guide head 6 are integrated by the connecting member 7. At this time, if the guide head 6 is provided on the upstream side of the jet flow of the measuring head 4 at a distance and the scale 8 is provided on the connecting member 7, it is convenient to determine the fitting position of the measuring head 4 into the guide groove 2. Is.

Further, the connecting member 7 and the guide head 6 can be provided with a standard 15 for defining the mounting height of the auxiliary nozzle 3.

[0010]

[Action]

 In the dirt measuring device of the present invention, the measuring head 4 is fitted in the guide groove 2 of the lure by keeping a certain distance in the air ejection direction from the auxiliary nozzle 3 to be measured with the loom stopped. And the flow velocity of the air jetted from the auxiliary nozzle 3 is measured by a plurality of flow velocity measuring elements 5 provided in the measuring head 4, and the flow velocity distribution of the jet air of the auxiliary nozzle 3 in the guide groove 2 is obtained. . Then, the degree of contamination of the auxiliary nozzle 3 is determined based on the difference between the flow velocity and the distribution of the injection air of the auxiliary nozzle 3 at the measurement point before and after the use.

At this time, when the guide head 6 is provided on the upstream side of the measurement head 4 and the scale 8 is provided on the connecting member 7 connecting the guide head 6 and the scale 8, the auxiliary nozzle 3 to be measured is aligned with the scale 8. Thus, the work of setting the distance L from the auxiliary nozzle 3 to the measurement position can be easily performed.

Further, by providing the connection member 7 and the guide head 6 with the reference 15 for determining the height of the auxiliary nozzle 3, the device of the present invention is also installed as a jig when the auxiliary nozzle 3 is installed in the loom. It can be used as a height inspection tool for auxiliary nozzles.

[0013]

Embodiment FIG. 1 and FIG. 2 are perspective views showing an embodiment of the present invention in a measuring state. The air-blowing loom 11 of the loom has a recess 12 on the front edge side thereof, and in the reed 1 formed by arranging a large number of the reed wing, a guide groove 2 serving as a weft passage is formed by the continuous recesses 12. Is formed.

The auxiliary nozzle 3 is planted in a sley for fixing the fish 1, and the tip of the auxiliary nozzle 3 is located below the guide groove 2 (the cloth fell side). At the tip of the auxiliary nozzle 3, there is provided a nozzle hole for injecting a jet flow in the weft flying direction toward the guide groove 2, and the air flows from this nozzle hole to the guide groove 2 as shown in FIG. It is jetted while diffusing.

The dirt measuring device 10 is provided with a measuring head 4 and a guide head 6 which are shaped to be fitted into the guide groove 2 from the front side of the fish 1, and both heads 4 and 6 are connected from the connecting member 7. The brackets 13 and 14 that extend are integrally formed at the tips. The surface of the connecting member 7 on the side of the OSA 1 is a flat surface that abuts on the upper front surface of the OSA. By abutting against the front surface, it is fixed on the front surface of the fish 1 in a fixed posture, and in this fixed state, it can be freely moved along the guide groove 2.

By embedding a magnet in the surface of the connecting member 7 on the side of the feeding member, the dirt measuring device 10 can be fixed on the front surface of the feeding member by the attraction force of the magnet without pressing it by hand. .

The bottom surface 15 of the bracket 14 on the guide head 6 side serves as a reference surface that defines the height when the auxiliary nozzle 3 is fixed to the loom, and the tip of the auxiliary nozzle 3 is aligned with this bottom surface 15. By fixing it to the loom, the work of mounting the auxiliary nozzle 3 becomes easy. This also enables the dirt measuring device 10 to be used as an inspection tool for the mounting height of the auxiliary nozzle 3.

The guide head 6 is located upstream of the measuring head 4 (on the side of the weft-insertion main nozzle), and a plurality of pitot tubes 5 are planted on the surface of the measuring head 4 facing the guide head 6. There is. In the illustrated embodiment, five Pitot tubes 5 are arranged so as to be positioned at the center of the guide groove 2, the upper and lower corners on the back side, and the upper and lower corners on the front side. A scale 8 is provided on the front surface of the connecting member 7 starting from the tip of the Pitot tube 5 (flow velocity measuring position).

A plurality of auxiliary nozzles 3 are provided along the flight path of the weft, but the mutual distance and the reaching distance L until the jet flow J from the auxiliary nozzles flow into the guide groove 2 are not constant. , Which is suitable for each loom and weft used. In the dirt measuring apparatus 10 of the illustrated embodiment, with the loom stopped, the auxiliary nozzle 3 to be measured is adjusted to the scale of the scale 8 corresponding to the reaching distance L of the jet flow, and the measuring head 4 is measured. The guide head 6 and the guide head 6 are fitted in the guide groove 2 and fixed on the front surface of the cage 1. The auxiliary nozzle 3 is supplied with pressurized air under a certain condition, and the guide groove 2 for the air flow ejected from the nozzle hole. The measurement at the installation position of each pitot tube 5 inside is measured. In the apparatus of the embodiment shown in the figure, the flow velocity of the air flow is measured at five points in the guide groove 2, so that the measured values of the auxiliary nozzles are compared with those of the auxiliary nozzle 3 before use. Measure the performance degradation due to dirt on.

[0020]

[Table 1]

Table 1 shows an example of measured values obtained by actually measuring the blast air of the auxiliary nozzle using the stain measuring device 10 of the present invention. As shown in Fig. 5, the dirt measuring device used in Table 1 has three pitot tubes with the upper upper corner (measured value A), the center (measured value B), and the lower lower corner () of the guide groove 2 of the lure. It is arranged so as to be located at the measured value C). In addition, Table 1 shows the measured values of the conventional method using one Pitot tube as reference values.

As is clear from Table 1, although the reference value does not change much before and after use, the measured value using the device of the present invention shows that the reference value is in the corner of the guide groove 2. The flow velocity of the arranged Pitot tube largely changes before and after use, and it can be determined that the performance of the auxiliary nozzle 3 is significantly deteriorated due to dirt. The decrease in the flow velocity at the corners of the guide groove 2 typically occurs when the dirt 17 is unevenly attached to the nozzle holes 16 as shown in FIG.

[0023]

[Effect of device]

 According to the device of the present invention described above, it is possible to accurately measure the performance deterioration of the auxiliary nozzle due to the contamination of the nozzle pipe and the nozzle hole. When performing this measurement, it is not necessary to remove the auxiliary nozzle from the loom, so that the measurement can be performed easily and the measurement position can be set easily and accurately. There is an effect that the fruit can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment shown in a measurement state.

FIG. 2 is a perspective view schematically showing the measurement principle.

FIG. 3 is a perspective view showing a conventional measuring means.

FIG. 4 is a perspective view showing jet measuring means of an auxiliary nozzle outside a conventional loom.

FIG. 5 is a diagram showing the arrangement of pitot tubes of the device used for the test.

FIG. 6 is an explanatory view showing an example of dirt on a nozzle.

[Explanation of symbols]

 1 Osamu 2 Guide groove 4 Measuring head 5 Pitot tube 6 Guide rod 7 Connecting member 8 Scale

Claims (3)

[Scope of utility model registration request] 1. A measuring head (4) fitted into the guide groove (2) of the lure (1) from the front side of the lure, and the measuring head (4) is provided.
A dirt measuring device for an auxiliary nozzle, characterized in that a large number of flow velocity measuring elements (5) facing the side of the auxiliary nozzle to be measured are provided on one end face of (4). 2. A guide head (6) fitted into the guide groove (2) at a position distant from the auxiliary nozzle (3) to be measured of the measuring head (4) is integrated with the measuring head (4). The dirt measuring device for an auxiliary nozzle according to claim 1, wherein the dirt measuring device is provided. 3. A scale (8) is provided on the front surface of a connecting member (7) which integrates the measuring head (4) and the guide head (6), and the scale (8) is provided on the connecting member (7) or the guide head (6). 3. A dirt measuring device for an auxiliary nozzle according to claim 2, wherein a reference (15) is provided which defines the mounting height of the auxiliary nozzle (3).