CN104913887B - Inner tube of a tyre detection means and inner tube of a tyre detection method - Google Patents

Abstract

The invention relates to an inner tube detection device and an inner tube detection method, which belong to the field of inner tube production detection equipment and detection technology. It is characterized in that it includes an upper mold (1) and a lower mold (2) that can hold the inner tube, the lower mold (2) is installed on the upper part of the lower support frame (3), and the upper mold (1) is fastened to the lower mold (2) ) to form a closed space that can hold the inner tube. The upper mold (1) can be lifted up and down through the lifting device. The inner walls of the upper mold (1) and the lower mold (2) are covered with air passages. An air charging port (9) is provided, an air outlet (6) is provided on the upper mold (1) and the lower mold (2), and an air pressure detection device is installed at the air outlet (6). The inner tube detection device and the inner tube detection method can automatically detect the airtightness of the inner tube, reduce the labor intensity of workers, have a strict and accurate detection process, and increase the qualified rate of products leaving the factory.

Description

Inner tube detection device and inner tube detection method

technical field

The invention relates to an inner tube detection device and an inner tube detection method, which belong to the field of inner tube production detection equipment and detection technology.

Background technique

The inner tube is an air-bearing container for inflation and vibration reduction, and is used as an auxiliary air-bearing container for the inner cavity of the tires of trucks, motorcycles, bicycles, and rickshaws. An important qualification index for the inner tube to leave the factory is to test the air tightness, that is, the situation of gas leakage within a certain period of time after being fully inflated. Under the existing technology, the process of testing the air tightness of inner tubes mostly relies on manual testing. Such a testing method consumes a lot of manpower and increases the labor intensity of workers. Moreover, the testing process is not rigorous, and it is prone to detection errors, reducing the The qualified rate of the products leaving the factory.

Contents of the invention

The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide an inner tube detection device and an inner tube detection method that can automatically detect the air tightness of the inner tube, reduce the labor intensity of the workers, have a rigorous and accurate detection process, and improve the pass rate of the product from the factory .

The technical solution adopted by the present invention to solve the technical problem is: the inner tube detection device includes an upper mold and a lower mold that can hold the inner tube, the lower mold is installed on the upper part of the lower support frame, and the upper mold is fastened directly above the lower mold, Form a closed chamber that can hold the inner tube. The upper mold can be lifted up and down through the lifting device. The inner walls of the upper mold and the lower mold are covered with air passages. The lower mold is equipped with an air inlet. The air outlet is equipped with an air pressure detection device at the air outlet, and the air pressure detection device adopts a barometer. The inflation nozzle of the inner tube can be stretched out from the inflation port to inflate, and a sealing structure is used to seal between the inflation port and the inflation nozzle. If there is gas leakage at any position of the inner tube, the gas can be discharged from the air outlet through the air flow channel, and the air pressure detection device is used to observe whether there is gas leakage.

The airtight chamber is a circle-shaped structure with the center point of the inner tube as the center, the vertical section shape of the airtight chamber is the same as the vertical section shape of the inner tube, and the outer diameter of the airtight chamber is the rated diameter of the inner tube in the normal working state of the inner tube. 1-1.5 times the diameter of the outer circle under air pressure. After the inner tube is inflated and inflated, it is close to the air flow channel on the inner wall of the airtight chamber. If there is an air leakage point in the inner tube, the gas will circulate along the air flow channel and be discharged from the air outlet.

The air flow channel is formed by interlacing the helical wefts distributed on the inner walls of the upper mold and the lower mold and the warps vertically arranged inside the helical wefts. The helical wefts of the upper mold and the lower mold are respectively distributed on the upper mold and the lower mold. Thread raised lines or thread grooves on the inner wall; the warp lines of the upper die and the lower die are a plurality of circular lines intersecting with the helical weft lines. Gas enters the airflow channel formed by the helical weft from the gap between adjacent warp threads, flows along the helical direction of the helical weft, and is discharged from the gas outlet. The distance between adjacent warps is between 0.5mm and 5mm. This design can prevent the inner tube from expanding after inflation and being squeezed into the helical weft, which will hinder the flow and collection of the inner tube leakage airflow and prevent the leakage gas from reaching the outlet smoothly. breath.

Preferably, the lifting device includes a hydraulic cylinder and a guide column, the hydraulic cylinder is installed above the upper mold through a support frame, the lower end of the output shaft of the hydraulic cylinder is connected to the upper mold, and guide columns are symmetrically arranged on both sides of the output shaft. The lifting device can not only lift the upper mold up and down, but also press the upper mold tightly, so that the upper mold and the lower mold can be tightly fastened to form a closed space to prevent air leakage from the joint. The guide column plays a guiding role to make the operation more stable.

The lifting device includes a cylinder and a guide column, the cylinder is installed above the upper mold through a support frame, the lower end of the output shaft of the cylinder is connected to the upper mold, and the guide columns are symmetrically arranged on both sides of the output shaft.

The inner tube detection method utilizing the inner tube detection device has the following steps:

a. Put the inner tube to be tested into the lower mold, and the inflation nozzle of the inner tube protrudes from the inflation port;

b. The lifting device drives the upper mold to descend, and the upper mold is fastened directly above the lower mold to form a closed chamber;

c. Use the inflation device to inflate the inner tube through the inflation port, and the expanded inner tube is in close contact with the airflow channel in the airtight chamber;

d. Determine whether there is an air leak. If there is an air leak, the gas will be collected through the airflow channel and discharged from the air outlet. The air pressure detection device will detect the change in air pressure; if there is no air leak, the air pressure detection device will have no change;

e, deflate through the inflation port, take out the inner tube, and complete the test.

Compared with the prior art, the beneficial effects of the above-mentioned technical solution of the inner tube detection device are:

1. Automatically detect the air tightness of the inner tube to reduce the labor intensity of the workers: design the lower mold and the upper mold that can be automatically lifted, and the inner walls of the upper mold and the lower mold are covered with air flow channels, and the upper mold or the lower mold is provided with an air outlet; If there is gas leakage anywhere in the inner tube, the gas can be discharged from the air outlet through the airflow channel, and the air outlet can be connected to a barometer or other detection devices that can detect whether there is gas leakage, so as to realize automatic detection of inner tube gas Tightness, no need to use the manual detection method under the prior art, greatly reducing the labor intensity of workers.

2. The unique design of the airflow channel formed by the interlacing of spiral weft and warp can detect air leakage at any position of the inner tube. The entire detection process is rigorous and accurate, and there will be no detection errors, which greatly improves the qualified rate of products leaving the factory.

Description of drawings

Fig. 1 is a schematic front view of the structure of the inner tube detection device.

Fig. 2 is a cross-sectional view of the structure along the line A-A in Fig. 1 .

FIG. 3 is a partially enlarged schematic diagram of B in FIG. 1 .

Among them: 1. Upper die 2. Lower die 3. Lower support frame 4. Spiral weft 5. Warp 6. Air outlet 7. Hydraulic cylinder 8. Guide column 9. Inflatable port.

detailed description

Fig. 1～3 is preferred embodiment of the present invention, below in conjunction with accompanying drawing 1～3 the present invention is described further.

Referring to accompanying drawing 1, inner tube inspection device comprises the upper mold 1 that can contain inner tube and the lower mold 2, and lower mold 2 is installed on the upper part of lower support frame 3, and upper mold 1 is fastened on the top of lower mold 2, forms a can contain inner tube closed chamber. The airtight chamber is a circular structure with the center point of the inner tube as the center. The vertical section shape of the airtight chamber is the same as that of the inner tube. 1.2 times the diameter of the circle.

The upper mold 1 is lifted up and down through the lifting device. The lifting device includes a hydraulic cylinder 7 and a guide column 8. The hydraulic cylinder 7 is installed above the upper mold 1 through a support frame. The lower end of the output shaft of the hydraulic cylinder 7 is connected to the upper mold 1. Both sides of the output shaft Symmetry is provided with guide column 8.

Referring to the accompanying drawings 1-3: the inner walls of the upper mold 1 and the lower mold 2 are covered with air flow channels, the lower mold 2 is provided with an air inlet 9, and the upper mold 1 and the lower mold 2 are equipped with an air outlet 6 and an air outlet 9 Open on the inner ring of the upper mold 1, and the air outlet 6 is opened on the outer ring of the upper mold 1 and the lower mold 2, and an air pressure detection device is installed at the air outlet 6, and the air pressure detection device is a barometer.

The air flow channel is formed by interlacing the spiral wefts 4 distributed on the inner walls of the upper mold 1 and the lower mold 2 and the warps 5 vertically arranged inside the spiral wefts 4, and the spiral wefts 4 of the upper mold 1 and the lower mold 2 are respectively distributed in the The thread raised lines on the inner walls of the upper die 1 and the lower die 2 can be bonded to the inner walls of the upper die 1 and the lower die 2 . The warps 5 of the upper mold 1 and the lower mold 2 are a plurality of annular lines interlaced with the spiral weft 4, and the warp 5 is bonded to one side of the spiral weft 4. The distance between adjacent warps 5 is between 0.5mm and 5mm. This design can prevent the inner tube from expanding after inflation and being squeezed into the helical weft 4, which will hinder the flow and collection of air leakage from the inner tube and prevent the leakage of gas from being smooth. Reach the air outlet 6.

The inner tube detection method utilizing the inner tube detection device has the following steps:

a. Put the inner tube to be tested into the lower mold 2, and the inflation nozzle of the inner tube stretches out from the inflation port 9;

b. The lifting device drives the upper mold 1 to descend, and the upper mold 1 is fastened directly above the lower mold 2 to form a closed chamber;

c. Use the inflation device to inflate the inner tube through the inflation port 9, and the expanded inner tube is in close contact with the airflow channel in the airtight chamber;

d. Judging whether there is an air leak, if there is an air leak, the gas will be collected through the airflow channel and discharged from the air outlet 6, and the air pressure detection device will detect the change in air pressure; if there is no air leak, the air pressure detection device will have no change;

e, deflate through the inflation port 9, take out the inner tube, and complete the test.

The helical wefts 4 of the upper die 1 and the lower die 2 in the above embodiment can also be threaded grooves respectively distributed on the inner walls of the upper die 1 and the lower die 2; the hydraulic cylinder 7 can also be an air cylinder, driven by air pressure; Mouth 9 also can be offered at lower mold 2.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention to other forms. Any skilled person who is familiar with this profession may use the technical content disclosed above to change or modify the equivalent of equivalent changes. Example. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims (4)

1. inner tube of a tyre detection means, it is characterised in that：Upper mould including the inner tube of a tyre can be held（1）With lower mould（2）, described lower mould （2）Installed in lower bracing frame（3）Top, upper mould（1）It is fastened on lower mould（2）Surface, the close of the inner tube of a tyre can be held by forming one Closed chamber room, upper mould（1）Oscilaltion, upper mould are realized by lowering or hoisting gear（1）With lower mould（2）Gas channel is covered with inwall, Lower mould（2）On offer inflation inlet（9）, upper mould（1）With lower mould（2）On be equipped with gas outlet（6）, gas outlet（6）Place's installation gas Press detection means, the charging connector of the inner tube of a tyre is from inflation inlet（9）Stretching is inflated, inflation inlet（9）Pass through sealing between charging connector Structure is sealed；Described gas channel is by being distributed in upper mould（1）With lower mould（2）Spiral parallel on inwall（4）With it is vertical It is arranged in spiral parallel（4）The warp of inner side（5）Staggeredly formed, adjacent warp（5）Between distance between 0.5mm to 5mm, Upper mould（1）With lower mould（2）Spiral parallel（4）To be respectively distributed to upper mould（1）With lower mould（2）Thread protrusion line on inwall or Person's thread groove；Upper mould（1）With lower mould（2）Warp（5）For a plurality of and spiral parallel（4）Staggered toroid；Described Airtight chamber is circle cyclic structure using the central point of the inner tube of a tyre as the center of circle, vertical section shape and the inner tube of a tyre vertical section shape of airtight chamber Shape is identical, and the outside diameter of airtight chamber is arranged in cover tire outside diameter under the nominal pressure of normal operating conditions for the inner tube of a tyre 1-1.5 again.

2. inner tube of a tyre detection means according to claim 1, it is characterised in that：Described lowering or hoisting gear includes hydraulic jack （7）And guide upright post（8）, hydraulic jack（7）Upper mould is arranged on by support frame（1）Top, hydraulic jack（7）Output shaft under The upper mould of end connection（1）, output shaft both sides are arranged with guide upright post（8）.

3. inner tube of a tyre detection means according to claim 1, it is characterised in that：Described lowering or hoisting gear includes cylinder and guiding Column（8）, cylinder is arranged on upper mould by support frame（1）Top, the upper mould of output shaft lower end connection of cylinder（1）, output shaft two Side is arranged with guide upright post（8）.

4. the inner tube of a tyre detection method carried out using the inner tube of a tyre detection means described in claim any one of 1-3, it is characterised in that：Tool Have the following steps：

A. the inner tube of a tyre to be detected is put into lower mould（2）Interior, the charging connector of the inner tube of a tyre is from inflation inlet（9）Stretch out；

B. lowering or hoisting gear drives upper mould（1）Decline, upper mould（1）It is fastened on lower mould（2）Surface, form an airtight chamber；

C. inflation inlet is passed through using aerating device（9）Inflated into the inner tube of a tyre, the gas channel in the inner tube of a tyre and airtight chamber of expansion It is in close contact；

D. gas leakage is judged whether, if gas leakage, gas is collected by gas channel and from gas outlet（6）Discharge, air pressure detection Device detects air pressure change；If air tight, pressure test device is unchanged；

E, pass through inflation inlet（9）Deflate, take out the inner tube of a tyre, complete detection.