阅读说明：本技术 一种超高压液压容器 (Ultrahigh pressure hydraulic container ) 是由 余尚江 陈显 周会娟 陈晋央 马新宝 孟晓洁 于 2021-02-05 设计创作，主要内容包括：本发明公开了一种超高压液压容器,包括外筒体,所述外筒体为厚壁圆筒结构,在外筒体的内部形成工作腔体；所述工作腔体的底部设置有下压盖；所述下压盖的内部设置有下端盖；所述下端盖为圆柱台阶式结构,在圆柱台上端外围连接有内筒体；所述内筒体的上部设置有圆柱台阶式结构的上端盖；所述上端盖的圆柱台底端与内筒体内壁和下端盖顶端共同构成用于储存高压液体的空腔室；所述上端盖的外部设置有上压盖。本发明通过设置超高压容器为双层筒体,采用热套合的方法装配,使内壁面产生沿壁厚方向均匀分布的预压缩应力,提高了压力容器的安全系数；同时本发明具有超高压力耐受能力、超高压密封能力,并且还降低了设备的制造成本,同时使用和维修方便。(The invention discloses an ultrahigh pressure hydraulic container, which comprises an outer cylinder body, wherein the outer cylinder body is in a thick-wall cylinder structure, and a working cavity is formed inside the outer cylinder body; a lower gland is arranged at the bottom of the working cavity; a lower end cover is arranged in the lower gland; the lower end cover is of a cylindrical step type structure, and an inner cylinder body is connected to the periphery of the upper end of the cylindrical table; the upper part of the inner cylinder body is provided with an upper end cover with a cylindrical step structure; the bottom end of the cylindrical table of the upper end cover, the inner wall of the inner cylinder body and the top end of the lower end cover jointly form a cavity chamber for storing high-pressure liquid; an upper gland is arranged outside the upper end cover. The ultrahigh pressure container is a double-layer cylinder body, and is assembled by adopting a hot-sleeving method, so that the inner wall surface generates pre-compression stress which is uniformly distributed along the wall thickness direction, and the safety coefficient of the pressure container is improved; meanwhile, the invention has ultrahigh pressure tolerance capability and ultrahigh pressure sealing capability, reduces the manufacturing cost of equipment and is convenient to use and maintain.)

1. The utility model provides an ultra-high pressure hydraulic container, includes outer barrel (1), characterized by: the outer cylinder body (1) is of a thick-wall cylinder structure, and a working cavity is formed inside the outer cylinder body (1); a lower gland (2) is arranged at the bottom of the working cavity; a lower end cover (3) is arranged in the lower gland (2); the lower end cover (3) is of a cylindrical step type structure, and an inner cylinder body (4) is connected to the periphery of the upper end of the cylindrical table; the upper part of the inner cylinder body (4) is provided with an upper end cover (5) with a cylindrical step structure; the bottom end of the cylindrical table of the upper end cover (5), the inner wall of the inner cylinder body (4) and the top end of the lower end cover (3) jointly form a cavity chamber (6) for storing high-pressure liquid; an upper gland (7) is arranged outside the upper end cover (5); and a handle (8) is arranged at the top of the upper gland (7).

2. An ultra high pressure hydraulic vessel as claimed in claim 1, wherein: the upper gland (7) and the lower gland (2) are of external thread and internal step cylinder structures, are in threaded connection with the outer cylinder body (1), and are used for compressing the upper end cover (5) and the lower end cover (3) and providing a reaction force of internal high-pressure liquid; the top surface of the upper gland (7) is provided with a threaded hole for mounting a handle (8); the handle (8) is fixed on the upper gland (7) through a bolt (9).

3. An ultra high pressure hydraulic vessel as claimed in claim 1, wherein: the top and the bottom of the hollow chamber (6) are provided with sealing components (10); the sealing components (10) and the inner surface of the inner cylinder body (4) form sealing bodies respectively.

4. An ultra high pressure hydraulic vessel as claimed in claim 2, wherein: a lead sealing plug (11) is further arranged inside the upper end cover (5), and a vent valve (12) is arranged at the top of the upper end cover (5); the bottom of the lower end cover (3) is also provided with a pressure inlet, a high-pressure pipeline threaded connector and a dismounting device connected with a threaded connector.

5. An ultra high pressure hydraulic vessel as claimed in claim 1, wherein: the inner diameter of the outer cylinder body (1) is slightly larger than the outer diameter of the inner cylinder body (4), and the inner cylinder body (4) is assembled in the outer cylinder body (1) by adopting a thermal sleeving method to form a prestressed double-layer pressure-bearing structure.

6. An ultra high pressure hydraulic vessel as claimed in claim 4, wherein: the lead sealing plug (11) is a steel cone with a certain taper, is externally matched with a polytetrafluoroethylene sealing pad with the same taper, has the high-pressure sealing and insulating capabilities of a lead, and can lead out an output signal of a test sensor wire in an ultrahigh-pressure hydraulic container.

7. An ultra high pressure hydraulic vessel as claimed in claim 4, wherein: the air release valve (12) is of an inverted ball valve self-sealing structure and is used for removing air in the cavity when oil is filled in the high-pressure oil cavity and sealing the ultrahigh-pressure hydraulic container after air is exhausted.

8. An ultra high pressure hydraulic vessel as claimed in claim 3, wherein: the sealing assembly (10) is a combined sealing ring composed of a beryllium bronze triangular ring, a silicone rubber sealing ring and a polytetrafluoroethylene sealing ring, the polytetrafluoroethylene sealing ring is arranged at the inner end of the combined sealing ring, the beryllium bronze triangular ring and the silicone rubber sealing ring are arranged at the outer end of the combined sealing ring, and the beryllium bronze triangular ring is clamped at the front end and the rear end of the silicone rubber sealing ring respectively.

9. An ultra high pressure hydraulic vessel as claimed in claim 8, wherein: the section of the silicon rubber sealing ring is an O-shaped sealing ring; the section of the polytetrafluoroethylene sealing ring is a square sealing ring.

Technical Field

The invention belongs to the technical field of high-pressure tests, and particularly relates to an ultrahigh-pressure hydraulic container.

Background

In some important industrial fields such as chemistry and weapons, a pressure of over 100MPa in operation is generally called ultra high pressure, and a vessel operated at a pressure of over this pressure is called an ultra high pressure vessel. The ultrahigh pressure equipment has wide application space in various fields such as powder metallurgy, artificial crystal, geomechanics, aerospace, isostatic pressing and the like, and becomes an essential tool in the fields.

The ultrahigh pressure equipment comprises a supercharger, a high pressure pipeline, a high pressure and low pressure pump, an electric control device, an ultrahigh pressure container and the like, wherein the ultrahigh pressure container is a key component of the whole high pressure equipment, is a key for safe and stable use of the equipment and generally depends on the rationality, integrity and reliability of a sealing structure. Depending on the application, one end of the pressure vessel is often designed as a removable structure, and the removable end must be sealed. The sealing structure of the openable ultrahigh pressure container can be classified into a forced sealing structure, a semi-self-tightening sealing structure and a self-tightening sealing structure according to the classification method of sealing acting force. The forced sealing is realized by ensuring a certain sealing specific pressure among the top cover, the sealing element and the end part of the cylinder body by virtue of the pretightening force of the connecting piece (main bolt). Along with the increase of the internal pressure, the top cover floats upwards, the bolt is elongated, and the specific sealing pressure is reduced. Therefore, the forced sealing requires larger bolt pretightening force, so that the gasket still has larger residual compression stress in a working state, and reliable sealing among the gasket, the top cover and the end part of the cylinder body is ensured. The semi-self-tightening seal is characterized in that a sealing element generates elastic deformation by means of bolt pretightening force, specific pressure for establishing initial seal is provided, and after the pressure rises, the contact pressure of a sealing surface rises along with the pressure, so that the sealing performance during working is ensured. The self-tightening seal utilizes the characteristics of the structure to ensure that the contact pressure of the seal ring is increased along with the increase of the pressure of the medium in the container. Therefore, excessive bolt pretightening force is not needed, the higher the medium pressure is, the higher the contact pressure is, the better the sealing performance is, and the sealing is still reliable when the operating conditions fluctuate. The development trend of the sealing structure of the high-pressure container is to adopt self-tightening or semi-self-tightening sealing, improve or innovate on the basis of the commonly used sealing structure, and design a novel high-pressure sealing structure which has reliable sealing, safe structure, simple and convenient manufacture, convenient assembly and disassembly and long service life.

Disclosure of Invention

In order to realize the purpose of the invention, the invention adopts the following technical scheme:

an ultrahigh pressure hydraulic container comprises an outer cylinder body, wherein the outer cylinder body is of a thick-wall cylinder structure, and a working cavity is formed inside the outer cylinder body; a lower gland is arranged at the bottom of the working cavity; a lower end cover is arranged in the lower gland; the lower end cover is of a cylindrical step type structure, and an inner cylinder body is connected to the periphery of the upper end of the cylindrical table; the upper part of the inner cylinder body is provided with an upper end cover with a cylindrical step structure; the bottom end of the cylindrical table of the upper end cover, the inner wall of the inner cylinder body and the top end of the lower end cover jointly form a cavity chamber for storing high-pressure liquid; an upper gland is arranged outside the upper end cover; and a handle is arranged at the top of the upper gland.

The upper gland and the lower gland are of external thread inner step cylinder structures and are in threaded connection with the outer cylinder body, the upper end cover and the lower end cover are pressed tightly, and the reaction force of internal high-pressure liquid is provided; the top surface of the upper gland is provided with a threaded hole for mounting a handle; the handle is fixed on the upper pressure cover through a bolt.

The top and the bottom of the hollow chamber are provided with sealing components; the sealing components and the inner surface of the inner cylinder body respectively form a sealing body.

A lead sealing plug is also arranged in the upper end cover, and a vent valve is arranged at the top of the upper end cover; the bottom of the lower end cover is also provided with a pressure inlet, a high-pressure pipeline threaded connector and a dismounting device connecting threaded connector.

The inner diameter of the outer cylinder body is slightly larger than the outer diameter of the inner cylinder body, and the inner cylinder body is assembled in the outer cylinder body by adopting a thermal sleeving method to form a prestressed double-layer pressure-bearing structure.

The lead sealing plug is a steel cone with a certain taper, is externally matched with a polytetrafluoroethylene sealing pad with the same taper, has the high-pressure sealing and insulating capabilities of a lead, and can lead out an output signal of a test sensor wire in an ultrahigh-pressure hydraulic container.

The air release valve is of an inverted ball valve self-sealing structure and is used for removing air in the cavity when oil is filled in the high-pressure oil cavity and sealing the ultrahigh-pressure hydraulic container after air is exhausted.

The sealing assembly is a combined sealing ring composed of a beryllium bronze triangular ring, a silicone rubber sealing ring and a polytetrafluoroethylene sealing ring, the polytetrafluoroethylene sealing ring is arranged at the inner end of the combined sealing ring, the beryllium bronze triangular ring and the silicone rubber sealing ring are arranged at the outer end of the combined sealing ring, and the beryllium bronze triangular ring is clamped at the front end and the rear end of the silicone rubber sealing ring respectively.

The section of the silicon rubber sealing ring is an O-shaped sealing ring; the section of the polytetrafluoroethylene sealing ring is a square sealing ring.

By the implementation of the invention, a good use effect is achieved, and the ultrahigh pressure container is a double-layer cylinder body and is assembled by adopting a thermal sleeving method, so that the inner wall surface generates pre-compression stress which is uniformly distributed along the wall thickness direction, and the safety coefficient of the pressure container is improved; the combined sealing ring, the lead sealing plug and the sealing plug are matched for use, so that the problems of sealing, insulation and the like of a sensor lead-out wire in an ultrahigh-pressure hydraulic container can be solved while ultrahigh-pressure hydraulic sealing is realized; the invention has ultrahigh pressure tolerance capability and ultrahigh pressure sealing capability, reduces the manufacturing cost of equipment and is convenient to use and maintain.

Drawings

Fig. 1 is a schematic structural view of the present invention.

FIG. 2 is a schematic view of a calibration sensor according to the present invention.

In the figure: 1. outer barrel, 2, lower gland, 3, lower end cover, 4, inner barrel, 5, upper end cover, 6, cavity, 7, upper gland, 8, handle, 9, bolt, 10, seal assembly, 11, lead sealing plug, 12, bleed valve, 13, calibrated sensor, 14, joint.

Detailed Description

The invention is described below with reference to the accompanying drawings.

The ultrahigh-pressure hydraulic vessel comprises an outer cylinder body 1, wherein the outer cylinder body 1 is of a thick-wall cylinder structure, a working cavity is formed inside the outer cylinder body 1, and preferably, the outer diameter of the outer cylinder body 1 is 340mm, and the height of the outer cylinder body is 400 mm; a lower gland 2 is arranged at the bottom of the working cavity; a lower end cover 3 is arranged in the lower gland 2; the lower end cover 3 is of a cylindrical step type structure, and an inner cylinder body 4 is connected to the periphery of the upper end of the cylindrical table; the upper part of the inner cylinder body 4 is provided with an upper end cover 5 with a cylindrical step structure; the inner diameter of the outer cylinder body 1 is slightly larger than the outer diameter of the inner cylinder body 4, the inner cylinder body 4 is assembled in the outer cylinder body 1 by adopting a hot-sleeving method to form a prestressed double-layer pressure-bearing structure, and preferably, the inner diameter of the inner cylinder body 4 is 100mm, the outer diameter is 200mm, and the height is 180 mm; the bottom end of the cylindrical table of the upper end cover 5, the inner wall of the inner cylinder body 4 and the top end of the lower end cover 3 jointly form a cavity chamber 6 for storing high-pressure liquid, preferably, the volume of the cavity chamber 6 is phi 100mm multiplied by 100mm, and the cavity chamber can bear and seal hydraulic pressure of more than 500 MPa; an upper gland 7 is arranged outside the upper end cover 5; a handle 8 is arranged at the top of the upper gland 7; the inner cylinder body 4 and the outer cylinder body 1 are assembled by adopting a thermal sleeving method to form a pre-stressed double-layer pressure-bearing structure, so that the inner wall surface generates pre-compression stress which is uniformly distributed along the wall thickness direction, and the safety coefficient of the pressure container is improved; the top surface of the upper gland 2 is provided with a threaded hole for mounting a handle 8; the handle 8 is fixed on the upper gland 7 through a bolt 9; the upper gland 7 and the lower gland 2 are of external thread inner step cylinder structures and are in threaded connection with the outer cylinder body 1 to tightly press the upper end cover 5 and the lower end cover 3 and provide reaction force of internal high-pressure liquid, and the upper gland and the lower gland are in a common triangular threaded connection structure form, so that compared with a clamp, a reaction frame and other structure forms, the gland is convenient to assemble and disassemble, labor is saved, the processing amount is reduced, common threads are easy to process, and the manufacturing cost of equipment is reduced; the top and the bottom of the hollow chamber 6 are provided with sealing components 10; the sealing components 10 and the inner surface of the inner cylinder 4 respectively form sealing bodies; a lead sealing plug 11 is also arranged in the upper end cover 5, and a deflation valve 12 is arranged at the top of the upper end cover 5; the bottom of the lower end cover 3 is also provided with a pressure inlet, a high-pressure pipeline threaded connector and a dismounting device connecting threaded interface; the lead sealing plug 11 is a sealing gasket which is made of a steel cone with a certain taper and is externally matched with polytetrafluoroethylene with the same taper, has the high-pressure sealing and insulating capabilities of a lead, and can lead out an output signal of a test sensor wire in an ultrahigh-pressure hydraulic container; the lead sealing plug 11 adopts a structural form that a steel cone with a certain taper is externally matched with a polytetrafluoroethylene sealing gasket with the same taper, the larger the pressure is, the better the sealing is, the polytetrafluoroethylene insulation degree is high, the replacement is convenient, and the problems of sealing and insulation of a sensor lead in an ultrahigh pressure hydraulic container and the like are solved; the air release valve 12 is of an inverted ball valve self-sealing structure and is used for removing air in the cavity when oil is filled in the high-pressure oil cavity and sealing the ultrahigh-pressure hydraulic container after air is exhausted; the valve body structure of the inverted ball valve self-sealing structure is adopted, the higher the pressure is, the better the sealing is, and the use and the maintenance are convenient; the sealing assembly 10 is a combined sealing ring composed of a beryllium bronze triangular ring, a silicone rubber sealing ring and a polytetrafluoroethylene sealing ring, the polytetrafluoroethylene sealing ring is arranged at the inner end of the combined sealing ring, the beryllium bronze triangular ring and the silicone rubber sealing ring are arranged at the outer end of the combined sealing ring, and the beryllium bronze triangular ring is respectively clamped at the front end and the rear end of the silicone rubber sealing ring; the section of the silicon rubber sealing ring is an O-shaped sealing ring; the section of the polytetrafluoroethylene sealing ring is a square sealing ring; the sealing assembly 10 realizes ultrahigh pressure hydraulic sealing up to 500MPa, and can prevent the sealing ring from being damaged by extrusion during pressurization and prevent the triangular ring from being dislocated and the sealing ring from being damaged by negative pressure in a container caused by jet flow during unloading.

Fig. 2 is a schematic diagram illustrating the calibration of a high pressure sensor using the ultra-high pressure hydraulic vessel of the present invention. The calibration of the high pressure sensor is to put the calibrated sensor 13 into an ultrahigh pressure container, pressurize the ultrahigh pressure container by an electric oil pump and a manual oil pump through a supercharger, monitor the pressure value of the ultrahigh pressure container by a standard pressure sensor, and record the output of the calibrated sensor 13 by a digital multimeter after passing through a conditioning amplifier. The calibration procedure was as follows:

s1, opening the upper end cover 5 of the ultrahigh pressure container, and welding the output line of the pressure sensor to be calibrated with the lead sealing plug 11;

s2, after all the calibrated sensors 13 are welded, the upper end cover 5 is placed back on the container and is screwed down through the handle 8;

s3, connecting the output line of the lead sealing plug 11 at the outer end of the upper end cover 2 with a conditioning amplifier and a digital multimeter of the sensor 13 to be calibrated; meanwhile, a high-pressure oil line pipeline joint 14 is connected to a high-pressure pipeline threaded connector arranged at the bottom of the lower end cover 3;

s4, opening the air release valve 12 on the ultrahigh pressure container, starting the electric oil pump, filling oil into the ultrahigh pressure container through the supercharger, and closing the air release valve after oil is discharged from the air release valve;

s5, according to the predicted pressure loading point, continuing to start the electric oil pump, and utilizing the cooperation of the manual oil pump to pressurize to the required pressure value;

s6, recording the marked pressure value and the output of the calibrated sensor 13 by a digital multimeter connected with the standard pressure sensor and the calibrated pressure sensor respectively;

s7, after the pressurization at each pressure loading point is completed, the upper end cap of the ultra-high pressure vessel is opened, and the calibrated sensor 113 is taken out.

In conclusion, the flow is the calibration process of the ultrahigh pressure hydraulic vessel for the high pressure sensor.

Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.