阅读说明：本技术 快接式中心杆拉取结构及分体式保真取芯器压力实验结构 (Quick-connection type center rod pulling structure and split type fidelity corer pressure experiment structure ) 是由 何志强 谢和平 高明忠 吴年汉 陈领 李聪 李佳南 杨明庆 余波 胡云起 于 2020-06-08 设计创作，主要内容包括：本发明涉及快接式中心杆拉取结构及分体式保真取芯器压力实验结构,包括拉杆、中心杆和快速插接结构,快速插接结构包括插头部、与插孔部以及至少两个弹簧卡扣,插头部和插孔部分别与拉杆、中心杆中的一个相连；插头部与插孔部可通过弹簧卡扣实现轴向卡接固定。弹簧卡扣包括卡块和径向设置的弹簧,插头部外侧壁有供卡块避让的凹槽,卡块外侧为斜面；当插头部与插孔部插接时,插孔部作用在斜面轴向力可产生一径向分力,推动卡块径向移动至完全没入凹槽内。本发明操作简单,可实现中心杆与拉杆的快速对接,利于提高工作效率；本发明利用中间连接件来衔接保压实验舱的上端和下端,可避免在保压实验舱上钻孔,防止对保压试验舱造成损害。(The invention relates to a quick-connection type central rod pulling structure and a split type fidelity corer pressure experiment structure, which comprise a pull rod, a central rod and a quick insertion structure, wherein the quick insertion structure comprises a plug part, a jack part and at least two spring buckles, and the plug part and the jack part are respectively connected with one of the pull rod and the central rod; the plug part and the jack part can be clamped and fixed axially through a spring buckle. The spring buckle comprises a clamping block and a spring arranged in the radial direction, a groove for avoiding the clamping block is formed in the outer side wall of the plug part, and an inclined surface is arranged on the outer side of the clamping block; when the plug part is inserted into the jack part, the axial force of the jack part acting on the inclined plane can generate a radial component force to push the clamping block to move radially until the clamping block is completely immersed into the groove. The invention has simple operation, can realize the quick butt joint of the central rod and the pull rod, and is beneficial to improving the working efficiency; the upper end and the lower end of the pressure maintaining test chamber are connected by the middle connecting piece, so that the pressure maintaining test chamber can be prevented from being drilled, and the pressure maintaining test chamber is prevented from being damaged.)

1. Connect formula well core rod to draw structure soon, its characterized in that: the quick plug-in structure comprises a plug part, a jack part matched with the plug part and at least two spring buckles, wherein the plug part and the jack part are respectively connected with one of the pull rod and the central rod;

the plug part and the jack part can be clamped and fixed axially through the spring buckle.

2. The quick connect center pole pulling structure of claim 1, wherein: the spring buckle is arranged on the plug part; the spring buckle comprises a clamping block and a spring arranged in the radial direction;

the outer side wall of the plug part is provided with a groove for avoiding the clamping block, one end of the spring is fixedly connected with the groove wall of the groove, and the other end of the spring is fixedly connected with the clamping block; under the action of the spring, one part of the clamping block is positioned in the groove, and the other part of the clamping block protrudes out of the outer side wall of the plug part;

the outer side of the clamping block is an inclined plane, so that when the plug part is inserted into the jack part, the axial force of the jack part acting on the inclined plane can generate a radial component force, and the clamping block is further pushed to move radially until the clamping block is completely immersed into the groove;

the plug socket is characterized in that a plug hole is formed in the plug hole portion, an annular groove is coaxially formed in the hole wall of the plug hole, and the cross section of the annular groove is matched with an outer protruding portion, exposed out of the plug portion, of the clamping block.

3. The quick connect center pole pulling structure of claim 1, wherein: the spring buckle is arranged on the jack part; the spring buckle comprises a clamping block and a spring arranged in the radial direction;

the jack part is provided with a jack, the wall of the jack is provided with a groove for avoiding the fixture block, one end of the spring is fixedly connected with the wall of the groove, and the other end of the spring is fixedly connected with the fixture block; under the action of the spring, one part of the clamping block is positioned in the groove, and the other part of the clamping block protrudes out of the hole wall of the insertion hole;

the outer side of the clamping block is an inclined plane, so that when the plug part is inserted into the jack part, the axial force of the plug part acting on the inclined plane can generate a radial component force, and the clamping block is further pushed to move radially until the clamping block is completely immersed into the groove;

the outer side wall of the plug part is coaxially provided with an annular groove, and the cross section of the annular groove is matched with the outer convex part of the fixture block exposed out of the hole wall of the jack.

4. The quick connect center pole pulling structure of claim 2 or 3, wherein: the cross section of the annular groove is triangular.

5. A quick connect center pole pulling structure as claimed in claim 1, 2 or 3, wherein: the outer side wall of the plug part is an outer conical surface, and the hole wall of the jack on the jack part is an inner conical surface matched with the outer conical surface.

6. The quick connect center pole pulling structure of claim 1, wherein: the pull rod is divided into two sections, and a tension meter is arranged between the two sections.

7. The split type fidelity coring device pressure experiment structure comprising the quick connect type center rod pulling structure of claims 1-6, characterized in that: the outer barrel of the capsule body comprises a first test piece, a second test piece and a middle connecting piece, wherein the first test piece, the second test piece and the middle connecting piece are all of a cylindrical structure;

the first test piece and the second test piece are connected together through an intermediate connecting piece, and a liquid injection hole is formed in the wall of the intermediate connecting piece;

the lower end sealing device is installed on the second test piece, the core barrel is located in the outer barrel of the cabin body, the lower end of the central rod extends into the core barrel, the lower end of the central rod is provided with an outer step, the upper end of the core barrel is provided with an inner step matched with the outer step, the lower end of the pull rod is connected with the upper end of the central rod through the quick plug-in structure, and the upper end of the pull rod extends out of the first test piece;

when the central rod is lifted upwards through the pull rod until the outer step is abutted against the inner step, the lifting of the central rod can drive the core barrel to synchronously move upwards;

when the central rod is lifted to the stroke end, the outer wall of the upper end of the core barrel is in sealing fit with the inner wall of the first test piece.

8. The split type fidelity corer pressure experiment structure of claim 7, characterized in that: the lower end sealing device is a flap valve; the flap valve comprises a valve seat, a valve clack and an elastic part, one end of the valve clack is movably connected with the outer side wall of the upper end of the valve seat, and the top of the valve seat is provided with a valve port sealing surface matched with the valve clack;

when the core barrel is positioned in the valve seat, the valve clack is opened by 90 degrees and is positioned between the core barrel and the second test piece; when the core barrel is lifted to a certain height by the central rod, the valve clack returns to the top surface of the valve seat under the action of the elastic element and gravity to be in sealing contact with the valve port sealing surface.

9. The split type fidelity corer pressure experiment structure of claim 8, characterized in that: the rock core barrel is characterized by also comprising a trigger mechanism, wherein the trigger mechanism comprises a trigger inner barrel, a trigger block and a trigger spring, a through hole is formed in the side wall of the trigger inner barrel, the trigger block is placed in the through hole, and a convex part matched with the trigger block is arranged on the outer side wall of the bottom of the rock core barrel; an avoidance opening matched with the trigger block is formed in the inner wall of the second test piece, the trigger block is located above the valve clack, and the avoidance opening is located above the trigger block;

the trigger spring is sleeved outside the trigger inner barrel, the outer wall of the trigger inner barrel is provided with a shoulder, the trigger spring is compressed between the shoulder and a step surface of the inner wall of the second test piece, and the trigger spring is positioned above the trigger block;

when the core barrel is positioned in the valve seat, the trigger inner barrel is positioned between the core barrel and the second test piece, the lower end of the trigger inner barrel is matched with the spigot of the valve seat, and the trigger block protrudes out of the inner side wall of the trigger inner barrel;

when the core barrel is lifted upwards to the first height, the protruding part of the core barrel abuts against the trigger block, so that the trigger inner barrel can be driven to synchronously move upwards;

when the core barrel is continuously lifted to the second height, the trigger block is pushed into the avoidance opening by the convex part, so that the trigger block avoids the convex part;

when the core barrel is continuously lifted upwards to the bottom of the core barrel to pass through the avoidance opening, the trigger block loses the acting force of the core barrel, and the trigger inner barrel drives the trigger block to fall back and press the closed valve clack under the action of gravity and the trigger spring.

10. The split-type fidelity coring device pressure experiment structure of claim 7, 8 or 9, wherein: the inner wall of the first test piece is provided with a first limiting step for axially limiting the core barrel, and when the upper end face of the core barrel abuts against the first limiting step, the center rod is lifted to a stroke end point.

Technical Field

The invention relates to the technical field of test systems of coring devices, in particular to a quick-connection type center rod pulling structure and a split type fidelity coring device pressure experiment structure.

Background

The mineral resources in the shallow part of the earth are gradually exhausted, and the marching to the deep part of the earth is an important direction of scientific and technological innovation in China in the near term and in the future. The in-situ rock mechanical behavior law of different deep occurrence terranes is the guiding science and theoretical basis of deep drilling, deep resource development and utilization and earth application science.

The characteristics of deep rock such as physical mechanics, chemical biology and the like are closely related to the in-situ environmental conditions, the in-situ environmental loss in the coring process can cause the distortion and the irreversible change of the physicochemical property and the mechanical property of the rock core, and the key of the attack is how to obtain the in-situ rock core under the deep environmental conditions and carry out real-time loading test and analysis under the in-situ fidelity state.

At present, in-situ fidelity coring devices store rock cores in a core storage tube after the rock cores are drilled by a drilling tool, and realize the simulation of the in-situ environment of the rock cores through a pressure maintaining device, a heat preserving device and a moisture preserving device which are connected with the core storage tube. Before core drilling, the pressure maintaining capacity needs to be verified, so that a pressure resistance testing platform of the pressure maintaining cabin is produced.

The pressure resistance test platform of the pressure holding chamber generally comprises a pressure holding experiment chamber, a hydraulic system and the like, and the pressure holding performance of the pressure holding experiment chamber is verified by injecting high-pressure liquid into the pressure holding experiment chamber through the hydraulic system. The pressure maintaining experiment chamber has various structures, but the existing pressure maintaining experiment chamber can not verify the action reliability of the central rod and the flap valve. If a pressure maintaining test chamber which can verify whether the actions of the central rod and the flap valve are reliable or not by lifting the central rod needs to be designed, how to realize the quick connection of the pull rod and the central rod in the pressure maintaining test chamber body is the key for improving the test efficiency.

In addition, the existing pressure maintaining experiment chamber is connected with a hydraulic pipeline by drilling holes in the cylinder wall, and the drilling holes of the drilling machine can damage the pressure maintaining experiment chamber, so that the experiment result is not real.

Disclosure of Invention

The invention aims to provide a quick-connection type central rod pulling structure and a split type fidelity corer pressure experiment structure, which can realize quick butt joint of a central rod and a pull rod and are beneficial to improving the working efficiency.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the quick-connection type central rod pulling structure comprises a pull rod, a central rod and a quick inserting structure, wherein the quick inserting structure comprises a plug part, a jack part matched with the plug part and at least two spring buckles, and the plug part and the jack part are respectively connected with one of the pull rod and the central rod;

the plug part and the jack part can be clamped and fixed axially through the spring buckle.

Further, the spring buckle is arranged on the plug part; the spring buckle comprises a clamping block and a spring arranged in the radial direction;

the outer side wall of the plug part is provided with a groove for avoiding the clamping block, one end of the spring is fixedly connected with the groove wall of the groove, and the other end of the spring is fixedly connected with the clamping block; under the action of the spring, one part of the clamping block is positioned in the groove, and the other part of the clamping block protrudes out of the outer side wall of the plug part;

the outer side of the clamping block is an inclined plane, so that when the plug part is inserted into the jack part, the axial force of the jack part acting on the inclined plane can generate a radial component force, and the clamping block is further pushed to move radially until the clamping block is completely immersed into the groove;

the plug socket is characterized in that a plug hole is formed in the plug hole portion, an annular groove is coaxially formed in the hole wall of the plug hole, and the cross section of the annular groove is matched with an outer protruding portion, exposed out of the plug portion, of the clamping block.

Or the spring is buckled and installed on the jack part; the spring buckle comprises a clamping block and a spring arranged in the radial direction;

the jack part is provided with a jack, the wall of the jack is provided with a groove for avoiding the fixture block, one end of the spring is fixedly connected with the wall of the groove, and the other end of the spring is fixedly connected with the fixture block; under the action of the spring, one part of the clamping block is positioned in the groove, and the other part of the clamping block protrudes out of the hole wall of the insertion hole;

the outer side of the clamping block is an inclined plane, so that when the plug part is inserted into the jack part, the axial force of the plug part acting on the inclined plane can generate a radial component force, and the clamping block is further pushed to move radially until the clamping block is completely immersed into the groove;

the outer side wall of the plug part is coaxially provided with an annular groove, and the cross section of the annular groove is matched with the outer convex part of the fixture block exposed out of the hole wall of the jack.

Preferably, the annular groove is triangular in cross-sectional shape.

Furthermore, the outer side wall of the plug part is an outer conical surface, and the hole wall of the jack on the jack part is an inner conical surface matched with the outer conical surface.

Furthermore, the pull rod is divided into two sections, and a tension meter is arranged between the two sections.

The split type fidelity corer pressure experiment structure comprises the quick-connection type central rod pulling structure, and also comprises a cabin outer cylinder, a core cylinder and a lower end sealing device for sealing and closing the lower end of the cabin outer cylinder, wherein the cabin outer cylinder comprises a first test piece, a second test piece and an intermediate connecting piece, and the first test piece, the second test piece and the intermediate connecting piece are all of cylindrical structures;

the first test piece and the second test piece are connected together through an intermediate connecting piece, and a liquid injection hole is formed in the wall of the intermediate connecting piece;

the lower end sealing device is installed on the second test piece, the core barrel is located in the outer barrel of the cabin body, the lower end of the central rod extends into the core barrel, the lower end of the central rod is provided with an outer step, the upper end of the core barrel is provided with an inner step matched with the outer step, the lower end of the pull rod is connected with the upper end of the central rod through the quick plug-in structure, and the upper end of the pull rod extends out of the first test piece;

when the central rod is lifted upwards through the pull rod until the outer step is abutted against the inner step, the lifting of the central rod can drive the core barrel to synchronously move upwards;

when the central rod is lifted to the stroke end, the outer wall of the upper end of the core barrel is in sealing fit with the inner wall of the first test piece.

Further, the lower end sealing device is a flap valve; the flap valve comprises a valve seat, a valve clack and an elastic part, one end of the valve clack is movably connected with the outer side wall of the upper end of the valve seat, and the top of the valve seat is provided with a valve port sealing surface matched with the valve clack;

when the core barrel is positioned in the valve seat, the valve clack is opened by 90 degrees and is positioned between the core barrel and the second test piece; when the core barrel is lifted to a certain height by the central rod, the valve clack returns to the top surface of the valve seat under the action of the elastic element and gravity to be in sealing contact with the valve port sealing surface.

Furthermore, the split type fidelity corer pressure experiment structure also comprises a trigger mechanism, wherein the trigger mechanism comprises a trigger inner cylinder, a trigger block and a trigger spring, a through hole is formed in the side wall of the trigger inner cylinder, the trigger block is placed in the through hole, and a bulge part matched with the trigger block is arranged on the outer side wall of the bottom of the rock core cylinder; an avoidance opening matched with the trigger block is formed in the inner wall of the second test piece, the trigger block is located above the valve clack, and the avoidance opening is located above the trigger block;

the trigger spring is sleeved outside the trigger inner barrel, the outer wall of the trigger inner barrel is provided with a shoulder, the trigger spring is compressed between the shoulder and a step surface of the inner wall of the second test piece, and the trigger spring is positioned above the trigger block;

when the core barrel is positioned in the valve seat, the trigger inner barrel is positioned between the core barrel and the second test piece, the lower end of the trigger inner barrel is matched with the spigot of the valve seat, and the trigger block protrudes out of the inner side wall of the trigger inner barrel;

when the core barrel is lifted upwards to the first height, the protruding part of the core barrel abuts against the trigger block, so that the trigger inner barrel can be driven to synchronously move upwards;

when the core barrel is continuously lifted to the second height, the trigger block is pushed into the avoidance opening by the convex part, so that the trigger block avoids the convex part;

when the core barrel is continuously lifted upwards to the bottom of the core barrel to pass through the avoidance opening, the trigger block loses the acting force of the core barrel, and the trigger inner barrel drives the trigger block to fall back and press the closed valve clack under the action of gravity and the trigger spring.

Furthermore, the inner wall of the first test piece is provided with a first limiting step for axially limiting the core barrel, and when the upper end face of the core barrel abuts against the first limiting step, the center rod is lifted to the stroke end point.

Compared with the prior art, the invention has the following beneficial effects:

the rapid inserting structure is simple to operate and reliable in performance, can realize rapid butt joint of the central rod and the pull rod, and is beneficial to improving the working efficiency.

2, the upper end and the lower end of the pressure maintaining test chamber are connected by the middle connecting piece, so that the drilling on the pressure maintaining test chamber can be avoided, the pressure maintaining test chamber is prevented from being damaged, and the accuracy of the test can be improved.

Drawings

FIG. 1 is a schematic view of a first embodiment of a tie rod in a configuration in which it is detached from a center rod;

FIG. 2 is an enlarged view of a portion of FIG. 1 at C;

FIG. 3 is a schematic view of a pull rod and center rod being plugged together in accordance with an embodiment;

FIG. 4 is an enlarged view of a portion of FIG. 3 at D;

FIG. 5 is a schematic structural diagram of a second embodiment of a quick-connect structure;

FIG. 6 is a schematic structural diagram of a third embodiment of a quick-connect structure;

FIG. 7 is a schematic structural view of a two-piece drawbar;

FIG. 8 is a schematic structural diagram of a pressure experiment structure of the split type fidelity corer in the invention;

FIG. 9 is a schematic view of the configuration of the holding pressure experiment chamber when the center pole is not lifted;

FIG. 10 is an enlarged view of a portion of FIG. 9 at A;

FIG. 11 is a schematic view of the configuration of the holding pressure test chamber when the center pole is lifted to the end of travel;

fig. 12 is a partial enlarged view at B in fig. 11;

FIG. 13 is a schematic view of the holding pressure test chamber when the outer cylinder is disassembled into an upper part and a lower part;

FIG. 14 is a schematic view of the construction of the pressurizing intermediate member;

FIG. 15 is a schematic structural diagram of a split-type fidelity corer pressure experimental configuration with the center rod not lifted;

FIG. 16 is a schematic diagram of the split-type fidelity corer pressure test configuration as the center rod is raised to the end of travel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings.