阅读说明：本技术 一种单体液压支柱工作阻力检测装置 (Working resistance detection device for single hydraulic prop ) 是由 宋成祥 张航 潘心栋 孟凡龙 蒋绪军 徐庆清 胡兆新 辛会玲 于 2020-12-25 设计创作，主要内容包括：一种单体液压支柱工作阻力检测装置,包括固定部和检测部,所述固定部自下而上依次为紧固套夹、第一外壳和调节单元,所述紧固套夹与单体液压支柱连接,所述第一外壳内部贯通有第一液压通道,所述第一外壳侧壁设有连接孔,并与检测部连接,所述检测部包括第二外壳、接头和内筒,所述内筒介于接头与第二外壳之间,其内设有反应室,所述接头内部设有第二液压通道,所述第二液压通道一端与连接孔连接,另一端与反应室连接,所述内筒外壁远离接头一端分别设有应变光纤放置槽和温度光纤放置槽,所述第二外壳远离接头一端设有出纤口。本检测装置,采用光纤光栅无源监测手段,可对煤矿下的单体液压支柱进行远程监测。(The utility model provides a hydraulic prop working resistance detection device, includes fixed part and detection portion, the fixed part is fastening collet, first shell and regulating unit from bottom to top in proper order, fastening collet is connected with hydraulic prop, first shell is inside to be link up there is first hydraulic passage, first shell lateral wall is equipped with the connecting hole to be connected with the detection portion, the detection portion includes second shell, joint and inner tube, the inner tube is between connecting and second shell, is equipped with the reacting chamber in it, connect inside second hydraulic passage that is equipped with, second hydraulic passage one end is connected with the connecting hole, and the other end is connected with the reacting chamber, the inner tube outer wall is kept away from to connect one end and is equipped with the optic fibre standing groove of meeting an emergency and temperature optic fibre standing groove respectively, the second shell is kept away from to connect one end and is equipped with out fine mouthful. The detection device adopts a passive fiber grating monitoring means, and can remotely monitor the single hydraulic prop under a coal mine.)

1. The working resistance detection device for the single hydraulic prop is characterized by comprising a fixing part and a detection part, wherein the fixing part comprises a first shell (1), a fastening sleeve clamp (2) and an adjusting unit, one end of the fastening sleeve clamp (2) is connected with the lower part of the first shell (1), the other end of the fastening sleeve clamp is connected with the single hydraulic prop, a first hydraulic channel (104) penetrates through the first shell (1), the adjusting unit is assembled at one end, far away from the fastening sleeve clamp (2), of the first shell (1), a push rod (5) is arranged in the adjusting unit, and the push rod (5) penetrates through the first hydraulic channel (104) of the first shell (1) and then extends into the fastening sleeve clamp (2);

the side wall of the first shell (1) is provided with a connecting hole and is connected with a detection part, the detection part comprises a second shell (9), a joint (10) and an inner cylinder (11), one end of the inner cylinder (11) is connected with the joint (10), the other end is connected with the second outer shell (9), a reaction chamber (1105) is arranged in the connector (10), a second hydraulic channel (1004) is arranged in the connector, one end of the second hydraulic channel (1004) is connected with the connecting hole on the side wall of the first shell (1), the other end is connected with the reaction chamber (1105) of the second shell (9), one end of the outer wall of the inner cylinder (11) far away from the joint (10) is respectively provided with a strain optical fiber placing groove (1103) and a temperature optical fiber placing groove (1104), the inner space of the second shell (9) is larger than the maximum size of the optical fiber placing groove of the inner cylinder (11), one end, far away from the joint (10), of the second shell (9) is provided with a fiber outlet (902).

2. The single hydraulic prop working resistance detection device according to claim 1, wherein the first housing (1) comprises an upper connecting cylinder (101), a lower connecting cylinder (102) and an annular table (103), the diameter of the annular table (103) is larger than that of the upper connecting cylinder (101) and that of the lower connecting cylinder (102), the upper connecting cylinder (101) and the lower connecting cylinder (102) are respectively located at the upper end and the lower end of the annular table (103), and a first hydraulic passage (104) penetrates through the centers of the upper connecting cylinder (101), the lower connecting cylinder (102) and the annular table (103).

3. The device for detecting the working resistance of the single hydraulic prop according to claim 2, wherein the adjusting unit comprises an adjusting portion, a push rod (5) and a fastening portion, one end of the push rod (5) is fixedly connected with the adjusting portion, the other end of the push rod passes through the fastening portion and then is inserted into the first hydraulic channel (104) in the upper connecting cylinder (101), and the fastening portion fastens the push rod (5) and the upper connecting cylinder (101).

4. The single hydraulic prop working resistance detection device according to claim 3, wherein the ejector rod (5) is provided with a limiting table (501) and one or more sealing grooves (502), a limiting cavity is arranged inside the upper connecting cylinder (101) of the first housing (1), the size of the limiting table (501) is matched with the size of the limiting cavity, the sealing groove (502) is located at the lower part of the limiting table (501), a sealing member is sleeved on the sealing groove, and after the limiting table (501) is contacted with the bottom of the limiting cavity, the bottommost part of the sealing groove (502) is located above the side wall connecting hole of the first housing (1).

5. The single hydraulic prop working resistance detection device according to claim 1, wherein the joint (10) comprises a front joint (1001), a rear joint (1002), and a first fastening table (1003), the size of the front joint (1001) is smaller than that of the rear joint (1002), the front joint (1001) is connected with a side wall connection hole of the first housing (1), and the first fastening table (1003) is fixedly connected between the front joint (1001) and the rear joint (1002).

6. The single hydraulic prop working resistance detection device according to claim 5, wherein the inner cylinder (11) is open at the front end, closed at the rear end, and has a reaction chamber (1105) inside, the reaction chamber (1105) is provided with a reaction cylinder (1102) outside, the outer wall of the inner cylinder (11) is surrounded by a second fastening table (1101), and the second fastening table (1101) is sandwiched between the rear joint (1002) and the second housing (9).

7. The strut working resistance detecting device according to claim 6, wherein the cross-sectional shapes of the first fastening table (1003) and the second fastening table (1101) include a regular polygon shape.

8. The single hydraulic prop working resistance detection device according to claim 6, wherein the outer wall of the reaction cylinder (1102) in the radial plane of the rear portion of the reaction chamber (1105) is surrounded by a strained optical fiber placement groove (1103).

9. The single hydraulic prop working resistance detection device according to claim 6, wherein a temperature optical fiber placement groove (1104) is formed in an outer wall of the reaction cylinder (1102) at an end far away from the reaction chamber (1105) along an axial direction.

10. The single hydraulic prop working resistance detection device according to any one of claims 1 to 9, further comprising a pressure gauge (7), wherein the pressure gauge (7) is mounted on an outer side wall of the first housing (2).

Technical Field

The invention relates to the technical field of optical fiber sensor detection, in particular to a single hydraulic prop working resistance detection device.

Background

The single hydraulic prop is a main support article for coal mine extraction work in China at present, and has the characteristics of excellent performance, large bearing capacity, ideal support effect, long service cycle, prop withdrawal safety and the like. However, due to the problems of low coal mine management level, low overall quality of workers and the like, the use and maintenance randomness of the single hydraulic prop is high, the normal service life of the single hydraulic prop is seriously influenced, great potential safety hazards are brought to the safety production of coal mines, and serious people can cause coal mine production accidents. Therefore, in the actual use process of the single hydraulic prop, the single hydraulic prop needs to be monitored in real time to prevent the hydraulic prop from pressure relief.

The existing single hydraulic prop detection device is generally a portable pressure measuring instrument, comprises a pressure gauge, a locking sleeve, a liquid storage cylinder and the like, and needs a worker to check the real-time condition of each single hydraulic prop, for example, the single hydraulic prop pressure detection method and device provided in the patent No. CN 1030589C. The use of such pressure measuring instruments requires the use of a large amount of labor, which is costly in labor. Therefore, the monitoring device capable of remotely checking the pressure condition of the single hydraulic prop in real time is developed and designed.

Disclosure of Invention

In order to solve the problems that a large amount of manual detection is needed for monitoring the single hydraulic prop, and manpower is wasted, the invention provides the single hydraulic prop working resistance detection device, which adopts a fiber bragg grating passive monitoring means and can remotely monitor the single hydraulic prop under a coal mine.

The technical scheme of the invention is as follows:

the utility model provides a hydraulic prop working resistance detection device, includes fixed part and detection portion, the fixed part is used for being connected with hydraulic prop, specifically includes first shell, fastening collet and regulating unit, fastening collet one end and first shell sub-unit connection, the other end is connected with hydraulic prop, first shell inside is link up there is first hydraulic passage, the regulating unit assembly is kept away from fastening collet one end at first shell, is equipped with the ejector pin in it, the ejector pin passes and stretches into in the fastening collet after the first hydraulic passage of first shell presss from both sides, the length of ejector pin is designed for can push away hydraulic prop's feed liquor valve, through rotating or promoting the regulating unit, can realize advancing or retreating of ejector pin, and then make the interior liquid of hydraulic prop in get into in the first hydraulic passage of fixed part.

First shell lateral wall is equipped with the connecting hole to be connected with detection portion, detection portion includes the second shell, connects and the inner tube, inner tube one end and articulate, the other end and second shell connection are equipped with the reaction chamber in it, connect inside second hydraulic passage that is equipped with, second hydraulic passage one end is connected with the connecting hole of first shell lateral wall, and the other end is connected with the reaction chamber of second shell, introduces the reaction chamber with the liquid in the first hydraulic passage through second hydraulic passage in. The outer wall of the inner barrel is far away from one end of the joint and is provided with a strain optical fiber placing groove and a temperature optical fiber placing groove respectively, strain optical fibers and temperature optical fibers are placed in the strain optical fiber placing groove and the temperature optical fiber placing groove respectively, and the pressure condition in the corresponding single hydraulic prop can be obtained by demodulating optical fiber signals through a remote server. The inner space of the second outer shell is larger than the maximum size of the inner barrel optical fiber placing groove, and one end, far away from the connector, of the second outer shell is provided with a fiber outlet.

According to the detection device, the first shell comprises the upper connecting cylinder, the lower connecting cylinder and the annular table, the diameter of the annular table is larger than that of the upper connecting cylinder and that of the lower connecting cylinder, and the side wall of the annular table is provided with the detection part connecting hole for connecting the detection part. The upper connecting cylinder and the lower connecting cylinder are respectively positioned at the upper end and the lower end of the annular table, and a first hydraulic channel penetrates through the centers of the upper connecting cylinder, the lower connecting cylinder and the annular table.

According to the detection device, the adjusting unit comprises an adjusting part, a push rod and a fastening part, one end of the push rod is fixedly connected with the adjusting part, the other end of the push rod penetrates through the fastening part and then is inserted into the first hydraulic channel in the upper connecting cylinder, and the push rod and the upper connecting cylinder are fastened together by the fastening part.

Further, be equipped with spacing platform and one or multichannel seal groove on the ejector pin, the inside spacing chamber that is equipped with of last connecting cylinder of first shell, spacing platform size and spacing chamber size cooperation can restrict moving down of ejector pin apart from. The sealing groove is positioned at the lower part of the limiting table, and a sealing element is sleeved on the sealing groove and used for preventing hydraulic pressure in the single hydraulic prop from flowing upwards. Preferably, after the limiting table is contacted with the bottom of the limiting cavity, the bottommost part of the sealing groove is positioned above the connecting hole of the detecting part of the side wall of the first shell, so that liquid smoothly flows into the detecting part.

According to the detection device, the joint of the detection part comprises the front joint, the rear joint and the first fastening platform, the size of the front joint is smaller than that of the rear joint, the front joint is connected with the detection part connecting hole in the side wall of the first shell, the first fastening platform is fixedly connected between the front joint and the rear joint, and the joint and the first shell can be fixed together through the fixing tool.

According to the detection device, the front end of the inner cylinder is open, the rear end of the inner cylinder is closed, the interior of the inner cylinder is a reaction chamber, the outside of the reaction chamber is a reaction cylinder, the outer wall of the inner cylinder is surrounded by the second fastening table, the second fastening table is clamped between the rear joint and the second shell, and the joint, the inner cylinder and the second shell can be fixed together through the fixing tool.

Preferably, the cross-sectional shape of the first and second fastening stations comprises a regular polygon shape to facilitate clamping force of the fastening tool.

According to the detection device, the position of the strain optical fiber placing groove is located on the outer wall of the reaction cylinder in the radial plane at the rear part of the reaction chamber, so as to detect the deformation condition of the reaction chamber and the reaction cylinder after being pressed.

According to the detection device, the temperature optical fiber placing groove is positioned on the outer wall of the reaction cylinder, which is far away from one end of the reaction chamber, and is formed along the axial direction, so that the influence of the deformation of the reaction chamber on the temperature optical fiber can be reduced.

The detection device further comprises a pressure gauge, wherein the pressure gauge is assembled on the outer side wall of the first shell annular table, and the pressure condition of the single hydraulic prop can be seen in real time when patrolmen go into the well for inspection.

Compared with the prior art, the invention has the advantages that:

1. the single hydraulic prop working resistance detection device disclosed by the invention adopts a passive fiber grating monitoring means, can be used for remotely monitoring the single hydraulic prop under a coal mine, saves a large amount of labor cost and reduces the detection risk.

2. The working resistance detection device for the single hydraulic prop can control the ejector rod to jack or withdraw from the liquid inlet valve of the single hydraulic prop through the adjusting unit, the outer side wall of the first shell can be additionally provided with an outward-looking pressure gauge according to needs, the use modes are diversified, and workers can conveniently adjust the working resistance detection device at any time according to the working content.

3. According to the single hydraulic prop working resistance detection device, one of the strain optical fiber and the temperature optical fiber in the detection part is designed along the radial direction of the reaction cylinder, and the other one is designed along the axial direction of the reaction cylinder, so that the strain optical fiber can detect the deformation condition of the reaction cylinder to the greatest extent, and the influence on the temperature optical fiber is reduced.

Drawings

The aspects and advantages of the present application will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.

In the drawings:

FIG. 1 is a schematic front view showing a working resistance detecting apparatus for a single-body hydraulic prop according to embodiment 1;

FIG. 2 is a schematic reverse side view of the working resistance detecting apparatus for the single body hydraulic prop according to embodiment 1;

FIG. 3 is a side view of the fixing part in embodiment 1;

fig. 4 is a schematic structural view of a first housing in embodiment 1;

FIG. 5 is a schematic view showing the structure of a jack in embodiment 1;

FIG. 6 is a schematic view showing the structure of a detecting part in embodiment 1;

FIG. 7 is a sectional view of a detecting part in example 1;

FIG. 8 is a schematic view showing the structure of a detecting part in embodiment 1;

FIG. 9 is a schematic view showing the structure of a joint in example 1;

FIG. 10 is a schematic structural view of an inner cylinder in embodiment 1;

the components represented by the reference numerals in the figures are:

1. the optical fiber connector comprises a first shell, 101, an upper connecting cylinder, 102, a lower connecting cylinder, 103, an annular table, 104, a first hydraulic channel, 105, a detection part connecting hole, 106, a pressure gauge connecting hole, 2, a fastening collet, 3, a connecting table, 4, a feed rod, 5, a push rod, 501, a limiting table, 502, a sealing groove, 503, an upper push rod, 504, a middle push rod, 505, a lower push rod, 6, a fastening nut, 7, a pressure gauge, 8, a single hydraulic prop connecting head, 9, a second shell, 901, an outer cylinder, 902, a fiber outlet, 10, a connector, 1001, a front connector, 1002, a rear connector, 1003, a first fastening table, 1004, a second hydraulic channel, 11, an inner cylinder, 1101, a second fastening table, 1102, a reaction cylinder, 1103, a strain optical fiber placement groove, 1104, a temperature optical fiber placement groove, 1105 and a reaction chamber.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. It should be noted that these embodiments are provided so that this disclosure can be more completely understood and fully conveyed to those skilled in the art, and the present disclosure may be implemented in various forms without being limited to the embodiments set forth herein.

The directions "front and back", "left and right", etc. mentioned in the present invention are only used to express the relative positional relationship, and are not restricted by any specific directional references in practical application.

Example 1

Referring to fig. 1 and 2, fig. 1 and 2 are schematic structural diagrams of the working resistance detection device of the single hydraulic prop in embodiment 1, and the working resistance detection device includes a fixing portion and a detection portion, the fixing portion is used for being connected with the single hydraulic prop, and the detection portion is used for detecting the working resistance condition of the single hydraulic prop and feeding back the result to the remote server.

The following combination of fig. 3, the fixed part specifically includes first shell 1, fastening collet 2 and regulating unit, fastening collet 2 one end and the 1 sub-unit connection of first shell, the other end is connected with hydraulic prop connector 8, 1 inside of first shell has been link up first hydraulic passage 104, the regulating unit assembly is kept away from fastening collet 2 one end at first shell 1, is equipped with ejector pin 5 in it, ejector pin 5 stretches into in fastening collet 2 after passing first hydraulic passage 104 of first shell 1, the length design of ejector pin 5 is for can pushing away the feed liquor valve of hydraulic prop, through rotating or promoting the regulating unit, can realize advancing or retreating of ejector pin 5, and then make the interior liquid of hydraulic prop in get into in the first hydraulic passage 104 of fixed part.

Referring to fig. 4, the first housing 1 includes an upper connecting cylinder 101, a lower connecting cylinder 102 and an annular table 103, the upper connecting cylinder 101 and the lower connecting cylinder 102 are respectively located at the upper end and the lower end of the annular table 103, and a first hydraulic passage 104 is penetrated through the centers of the upper connecting cylinder 101, the lower connecting cylinder 102 and the annular table 103. The diameter of the annular table 103 is larger than the diameters of the upper connecting cylinder 101 and the lower connecting cylinder 102, a detection part connecting hole 105 and a pressure gauge connecting hole 106 are formed in the side wall of the annular table, the detection part connecting hole 105 and the pressure gauge connecting hole 106 are communicated with the first hydraulic channel 104, the detection part connecting hole 105 is used for connecting a detection part, and the pressure gauge connecting hole 106 is used for connecting a pressure gauge 7. Preferably, the angle between the connection hole 105 of the sensing part and the connection hole 106 of the pressure gauge is greater than 90 degrees to prevent the interference between the sensing part and the pressure gauge 7.

In this embodiment, the adjusting unit includes an adjusting portion, a push rod 5 and a fastening nut 6, one end of the push rod 5 is fixedly connected with the adjusting portion, the other end of the push rod 5 passes through the fastening nut 6 and then is inserted into the first hydraulic channel 104 in the upper connecting cylinder 101, a connecting portion between the push rod 5 and the fastening nut 6 is provided with a thread, and the fastening nut 6 is in threaded connection with the upper portion of the upper connecting cylinder 101.

Furthermore, the adjusting part comprises a connecting table 3 and a feeding rod 4, the connecting table 3 is fixedly connected with the top of the ejector rod 5, the feeding rod 4 penetrates through the connecting table along the direction perpendicular to the direction of the ejector rod 5, the ejector rod 5 is driven to rotate by rotating the feeding rod 4, and then the connecting table can move up and down under the guiding action of the fastening nut 6. Because the bottom of the push rod 5 is connected with the single hydraulic prop connector 8, when the push rod 5 moves forward, the liquid inlet valve of the single hydraulic prop can be pushed open, so that liquid flows into the first hydraulic channel 104, and when the push rod 5 moves backward, the liquid inlet valve of the single hydraulic prop can be closed.

Next referring to fig. 5, the ejector rod 5 is provided with a limiting table 501 and a plurality of sealing grooves 502, the upper connecting cylinder 101 of the first housing 1 is provided with a limiting cavity, and the size of the limiting table 501 is matched with the size of the limiting cavity to limit the downward movement distance of the ejector rod 5. The diameter of the lower shaft of the mandril 5 is smaller than the diameter of the first hydraulic channel 104, so that the liquid in the single hydraulic prop can flow upwards along the first hydraulic channel 104. The sealing groove 502 is located at the lower part of the limiting table 501, and an O-ring is sleeved on the sealing groove, and the size of the O-ring is matched with the diameter of the first hydraulic channel 104, so that the hydraulic pressure in the single hydraulic prop is prevented from continuously flowing upwards. Preferably, after the limit table 501 contacts with the bottom of the limit cavity, the bottom of the sealing groove 502 is located above the connection hole 105 of the detection part on the sidewall of the first housing 1, so that the liquid can smoothly flow into the detection part.

Referring to fig. 6 and 7, the detecting part includes a second housing 9, a joint 10, and an inner tube 11, one end of the inner tube 11 is connected to the joint 10, the other end is connected to the second housing 9, a reaction chamber 1105 is provided therein, a second hydraulic passage 1004 is provided at a central position inside the joint 10, one end of the second hydraulic passage 1004 is connected to the detecting part connecting hole 105 of the side wall of the first housing 1, and the other end is connected to the reaction chamber 1105 of the second housing 9, so that the liquid in the first hydraulic passage 104 is introduced into the reaction chamber 1105 through the second hydraulic passage 1004. The outer wall of the inner barrel 11 is provided with a strain optical fiber placing groove 1103 and a temperature optical fiber placing groove 1104 at the ends far away from the joint 10, strain optical fibers and temperature optical fibers are placed in the strain optical fiber placing groove 1103 and the temperature optical fiber placing groove 1104 respectively, and the pressure condition in the corresponding single hydraulic prop can be obtained by demodulating optical fiber signals through a remote server.

Referring to fig. 8, the second housing 9 includes an outer cylinder 901 and a fiber outlet 902, and an inner space of the outer cylinder 901 is larger than a maximum size of the optical fiber accommodating groove of the inner cylinder 11, so as to prevent the optical fiber grating from being touched by mistake when the inner cylinder 11 is placed into the second housing 9. One end of the outer cylinder 901, which is far away from the connector 10, is retracted inwards, and a fiber outlet 902 is arranged at the fiber closing opening, so that the fiber grating can be led out conveniently.

Referring to fig. 9, the joint 10 of the detection part includes a front joint 1001, a rear joint 1002, and a first fastening table 1003, the size of the front joint 1001 is smaller than that of the rear joint 1002, the front joint 1001 is screwed to the detection part connection hole 105 of the sidewall of the first housing 1, the first fastening table 1003 is fixedly connected between the front joint 1001 and the rear joint 1002, and the joint 10 and the first housing 1 can be fixed together by a fixing tool.

Referring to fig. 10, the inner cylinder 11 is located between the joint 10 and the second housing 9, the front end of the inner cylinder is open, the rear end of the inner cylinder is closed, the interior of the inner cylinder is a reaction chamber 1105, the reaction chamber 1105 is a reaction cylinder 1102, the outer wall of the inner cylinder 11 is surrounded by a second fastening table 1101, the second fastening table 1101 is sandwiched between the rear joint 1002 and the second housing 9, the front end and the rear end of the inner cylinder are both provided with threads, and correspondingly, the interior of the rear joint 1002 and the interior of the front end of the outer cylinder 901 are both provided with threads. The joint 10, the inner cylinder 11 and the second housing 9 can be fixed together by rotating the second tightening stage 1101 by a fixing tool.

Preferably, the cross-sectional shapes of the first and second fastening stations 1003, 1101 include regular polygonal shapes, such as quadrangles or hexagons, to facilitate the clamping force of the fastening tool.

In this embodiment, the position of the strain fiber placement groove 1103 is located on the outer wall of the reaction cylinder 1102 in the radial plane at the back of the reaction chamber 1105, so as to detect the deformation of the reaction chamber 1105 and the reaction cylinder 1102 after being pressed. The temperature optical fiber placing groove 1104 is located on the outer wall of the reaction cylinder 1102 at the end far away from the reaction chamber 1105 and is arranged along the axial direction, so that the influence of the deformation of the reaction chamber 1105 on the temperature optical fiber can be reduced.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or additions or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.