CN109130022B

CN109130022B - Method for vulcanizing small cylindrical sound beacon piezoelectric ceramic ring without rib grids inside

Info

Publication number: CN109130022B
Application number: CN201710466528.1A
Authority: CN
Inventors: 孔祥力; 张伟宁; 姜晓杰; 董世超; 胡清; 吴亮
Original assignee: Csic No760 Institute
Current assignee: Csic No760 Institute
Priority date: 2017-06-16
Filing date: 2017-06-16
Publication date: 2020-10-23
Anticipated expiration: 2037-06-16
Also published as: CN109130022A

Abstract

A method for vulcanizing a piezoelectric ceramic ring of a small cylindrical sound beacon without a rib grid inside belongs to the technical field of ocean engineering. The piezoelectric ceramic ring centering positioning device is characterized in that internal threads and the lower end face of the lower portion of the sound beacon pressure-resistant shell are used as centering positioning references of the piezoelectric ceramic ring, and the fixed seat is installed on the sound beacon pressure-resistant shell through threads; the position of the piezoelectric ceramic ring in the sound beacon pressure-resistant shell is positioned by utilizing the end face at the right side of the fixed seat; and sealing the gap between the plastic gasket and the sound beacon pressure-resistant shell by using an O-shaped ring arranged on the fixed seat. The invention has the advantages that: the method has the characteristics of good effect, simple method, compact structure, few processing parts, convenient disassembly and assembly, reusability and the like. The method is mainly used for vulcanizing the piezoelectric ceramic ring of the small cylindrical sound beacon without the rib grids inside.

Description

Method for vulcanizing small cylindrical sound beacon piezoelectric ceramic ring without rib grids inside

Technical Field

The invention belongs to the technical field of ocean engineering, relates to a manufacturing method of a small-sized acoustic beacon, and particularly relates to a vulcanizing method of a piezoelectric ceramic ring of a small-sized cylindrical acoustic beacon without an internal rib grid.

Background

In ocean monitoring and ocean engineering in the ocean field, a plurality of ocean parameter measuring devices and instruments need to be recycled to obtain measured data after the measurement is completed. However, due to a complex marine environment, failure of instruments and equipment, or other reasons, the equipment often does not normally float out of the water surface or sink to the sea bottom, and especially important instruments and equipment with high cost, such as a seabed-based platform, a side-scan sonar, an underwater robot, etc., if the instruments and equipment cannot be normally recovered, significant property loss is caused, and more importantly, measurement data cannot be obtained, so that experiment failure is caused. The adoption of measures to ensure that the instrument and equipment can be reliably recovered under the condition that the instrument and equipment are in a problem and cannot be normally recovered is particularly important. A small acoustic beacon can solve the above problem. The sound beacon can work in water or in a delayed mode and sends out pulse signals with fixed frequency. When the device is not normally recovered due to special conditions, the sound beacon is bound on the instrument device, and when the device cannot be normally recovered due to special conditions, the pulse signals sent by the sound beacon can be detected by the detection device on the water surface, so that the lost instrument device can be located and found.

The piezoelectric ceramic ring in the acoustic beacon is a sounding element of the acoustic beacon, and in order to ensure that the vibration generated by the piezoelectric ceramic ring can be efficiently transmitted out through the pressure-resistant shell of the acoustic beacon, the piezoelectric ceramic ring and the pressure-resistant shell of the acoustic beacon need to be filled with the sound-transmitting rubber and cured into a whole, namely, vulcanization. The acoustic beacon which sounds in water requires uniform sound radiation characteristics, so that the water surface detection equipment can detect signals sent by the acoustic beacon in all directions, the axis of the piezoelectric ceramic ring is required to be overlapped with the axis of the sound beacon pressure-resistant shell, meanwhile, the piezoelectric ceramic ring is required to be fixed in the sound beacon pressure-resistant shell, the sound-transmitting rubber is required to be prevented from leaking during vulcanization, and all the steps are required to be completed by a special vulcanization device when the piezoelectric ceramic ring is vulcanized. The position that has the muscle check to inside sound beacon pressure-resistant casing can utilize the muscle check to fix a position piezoceramics ring and prevent through the rubber pad that the sound transmission rubber can not take place to leak, does not have the sound beacon pressure-resistant casing of muscle check just need develop corresponding vulcanizer to guarantee the location placed in the middle of piezoceramics ring in sound beacon pressure-resistant casing and prevent that the sound transmission rubber from leaking to inside.

Disclosure of Invention

The invention aims to provide a vulcanization clamp and a vulcanization method which are required for vulcanizing an internal rib-free grid small cylindrical sound beacon piezoelectric ceramic ring and a sound beacon pressure-resistant shell into a whole, and aims to solve the technical problems of centering and sound-transmitting rubber leakage in the sound beacon pressure-resistant shell when the internal rib-free grid small cylindrical sound beacon piezoelectric ceramic ring is vulcanized.

The technical scheme of the invention is that a fixed seat with external threads is arranged on the internal threads of the sound beacon pressure-resistant shell and the end surface of the fixed seat is close to the internal threads of the sound beacon pressure-resistant shell by utilizing the characteristic that the internal threads at the end part of the sound beacon pressure-resistant shell are concentric with the internal circles of the holes of the sound beacon pressure-resistant shell at the position where a piezoelectric ceramic ring is arranged, a positioning sleeve is sleeved on the fixed seat, a plastic gasket, an oak gasket, a piezoelectric ceramic ring, an oak gasket and a supporting sleeve are sleeved on the positioning sleeve in sequence, a compression nut with internal threads is screwed on the external threads at the right end of the fixed seat, so that sound beacon parts such as the piezoelectric ceramic ring and the like are fixed; the parts required by the method for vulcanizing the piezoelectric ceramic ring of the small cylindrical sound beacon without the internal rib grid consist of a fixed seat, a positioning sleeve, a compression nut and an O-shaped ring, and the rest are the parts for forming the sound beacon; the position of the piezoelectric ceramic ring in the sound beacon pressure-resistant shell is positioned by utilizing the end face at the right side of the fixed seat; the O-shaped ring arranged on the fixed seat is used for sealing a gap between the plastic gasket and the sound beacon pressure-resistant shell, so that the sound-transmitting rubber is prevented from leaking during vulcanization; the positioning sleeve is sleeved on the middle shaft of the fixed seat, and the left end face of the positioning sleeve is contacted with the right end face of the stepped hole of the fixed seat, so that the position of the positioning sleeve is fixed; the positioning sleeve, the fixed seat and the piezoelectric ceramic ring are in clearance fit with each other, wherein the clearance fit is not more than 0.05mm, so that the piezoelectric ceramic ring is ensured to be superposed with the axis of the pressure shell of the acoustic beacon; the positioning sleeve is provided with two excircles with different diameters, the excircle with a large diameter is used for installing and positioning the plastic gasket, the piezoelectric ceramic ring and the oak gasket, and the excircle with a small diameter is used for installing and positioning the supporting sleeve; a crescent notch is formed in the outer circle of the piezoelectric ceramic ring, so that a lead welded on the inner side of the piezoelectric ceramic ring can pass through the notch; the major diameter excircle of the positioning sleeve is smaller than the diameter of the inner circle of the stepped hole at the right side of the fixing seat, and the middle part of the positioning sleeve is provided with a round hole to ensure that air can be smoothly discharged in the vulcanization vacuumizing process; two holes with fixed relative positions are processed on the lower end surface of the fixing seat, one function is to use a special spanner to disassemble the fixing seat after vulcanization is finished, and the other function is to smoothly discharge air in the vulcanization vacuumizing process; the compression nut is provided with a straight groove which is convenient to disassemble and assemble.

The invention has the advantages that: the method has the characteristics of good effect, simple method, compact structure, few processing parts, convenient disassembly and assembly, reusability and the like. The method is mainly used for vulcanizing the piezoelectric ceramic ring of the small cylindrical sound beacon without the rib grids inside.

Drawings

FIG. 1 is a schematic structural diagram of a vulcanization method of a built-in piezoelectric ceramic ring of a small cylindrical acoustic beacon without a rib grid inside.

In the figure: 1, fixing a base; 2O-shaped rings; 3 a plastic gasket; 4 an oak washer; 5, a piezoelectric ceramic ring; 6, positioning a sleeve; 7 sound beacon pressure shell; 8 supporting the sleeve; and 9, pressing the nut.

Fig. 2 is a schematic structural diagram of a fixing seat, fig. 3 is a schematic structural diagram of a compression nut, and fig. 4 is a schematic structural diagram of a positioning sleeve.

Detailed Description

The following detailed description of the invention refers to the accompanying drawings.

Before the vulcanization fixture is assembled, the release agent is uniformly sprayed on the outer circle surface of the positioning sleeve 6, the outer circle surface of the fixed seat 1 contacted with the positioning sleeve and the outer surface of the compression nut 9, so that the positioning sleeve 6 can be smoothly detached after vulcanization is finished, and the compression nut 9 is convenient for cleaning vulcanized rubber.

The specific implementation mode of the vulcanization method of the piezoelectric ceramic ring of the small-sized cylindrical sound beacon without the rib grids inside comprises two aspects of assembly before vulcanization and disassembly after vulcanization. The assembly sequence before vulcanization is: firstly, an O-shaped ring 2 is sleeved on a fixed seat 1 shown in the attached drawing 1, then the fixed seat 1 is screwed to a sound beacon pressure-resistant shell 7, a large-diameter end of a positioning sleeve 6 is inwards installed on the fixed seat 1, then a plastic gasket 3, an oak gasket 4, a piezoelectric ceramic ring 5, the oak gasket 4 and a support sleeve 8 are sequentially and respectively installed, and finally a compression nut 9 is screwed on a thread at the end part of the fixed seat 1. During vulcanization, the left end face of the fixed seat 1 shown in the attached drawing 1 is horizontally placed, sound-transmitting rubber is injected into a gap between an excircle opening of the support sleeve 8 and an inner hole of the sound beacon pressure-resistant shell 7, and the liquid level of the injected sound-transmitting rubber is flush with the upper end face of the support sleeve 8. After vulcanization is completed, the fixing seat 1 is removed by utilizing a special spanner to rotate anticlockwise, the compression nut 9 is removed, and the positioning sleeve 6 and the O-shaped ring 2 are taken out.

Claims

1. The utility model provides a small-size cylindrical sound beacon piezoceramics ring vulcanization method of inside no muscle check, the vulcanization anchor clamps that this method needs comprise fixing base (1), position sleeve (6), gland nut (9) and O shape circle (2), its characterized in that: the position of the piezoelectric ceramic ring (5) in the sound beacon pressure-resistant shell (7) is positioned by utilizing the right end surface of the fixed seat (1); sealing a gap between the plastic gasket (3) and the sound beacon pressure-resistant shell (7) by using an O-shaped ring (2) arranged on the fixed seat (1); the positioning sleeve (6) is sleeved on the middle shaft of the fixed seat (1), and the left end face of the positioning sleeve is contacted with the right end face of the stepped hole of the fixed seat (1), so that the position of the positioning sleeve (6) is fixed; the positioning sleeve (6) is provided with two excircles with different diameters, the excircle with the large diameter is used for installing and positioning the plastic gasket (3), the piezoelectric ceramic ring (5) and the oak gasket (4), and the excircle with the small diameter is used for installing and positioning the supporting sleeve (8); the major diameter excircle of the positioning sleeve (6) is smaller than the diameter of the inner circle of the stepped hole at the right side of the fixing seat (1), and a circular hole is formed in the middle of the positioning sleeve (6); the compression nut (9) is provided with a straight groove which is convenient to disassemble and assemble; before assembling the vulcanization fixture, uniformly spraying a release agent on the outer circle surface of the positioning sleeve (6), the outer circle surface of the fixed seat (1) contacted with the positioning sleeve and the outer surface of the compression nut (9); the assembly sequence before vulcanization is: firstly, an O-shaped ring (2) is sleeved on a fixed seat (1), then the fixed seat (1) is screwed to a sound beacon pressure-resistant shell (7), a large-diameter end of a positioning sleeve (6) is inwards installed on the fixed seat (1), then a plastic gasket (3), an oak gasket (4), a piezoelectric ceramic ring (5), the oak gasket (4) and a support sleeve (8) are sequentially and respectively installed, and finally a compression nut (9) is screwed on a thread at the end part of the fixed seat (1).