CN117605748A - Bolt with cable switching function and explosion-proof pressure measurement test device comprising same - Google Patents

Abstract

The invention relates to a bolt with a cable switching function and an explosion-proof pressure measurement test device with the same. The bolt includes: the bolt body is provided with a head and a screw rod, and is provided with a through hole penetrating the head and the screw rod along the axial direction; the hollow tube is axially inserted into the through hole, and a channel for the cable to pass through is provided in the center of the hollow tube; the first bearing and the second bearing are respectively positioned at two ends of the bolt, and the inner wall of the through hole for mounting the first bearing and the second bearing and the outer wall of the hollow tube are positioned between the first bearing and the second bearing, so that the hollow tube can rotate in the through hole. The switching of explosion-proof pressure measurement test's cable has been realized to this disclosure.

Description

Bolt with cable switching function and explosion-proof pressure measurement test device comprising same

Technical Field

The invention relates to the technical field of explosion-proof safety detection, in particular to a bolt with a cable switching function and an explosion-proof pressure measurement test device comprising the bolt.

Background

With the rapid development of the coal mine industry in recent years, the problem of underground coal mine safety detection is increasingly emphasized. The explosion-proof pressure measurement test is an important ring in underground coal mine safety detection, and can verify the compression resistance of the explosion-proof shell in an explosive environment, so that the explosion risk is predicted and reduced, the safety performance of equipment or a system inside the explosion-proof shell is effectively improved, and the occurrence probability of explosion accidents is reduced. Explosion-proof pressure tests generally need to be performed in a closed test environment.

At present, for an explosion-proof pressure measurement test, a plurality of pressure sensors are generally arranged in a test environment and are connected with the outside through data wires, but the closed test environment is damaged due to the fact that the plurality of data wires are led out, and the plurality of data wires are easy to wind, so that the accuracy of the explosion-proof pressure measurement test is affected.

Disclosure of Invention

In view of the above, the present invention provides a bolt having a cable switching function and an explosion-proof pressure measurement test apparatus including the same, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems occurring in the prior art.

To achieve the foregoing object, a first aspect of the present invention provides a bolt having a cable transit function, wherein the bolt includes:

a bolt body having a head and a screw, and having a through hole penetrating the head and the screw in an axial direction;

the hollow tube is axially inserted into the through hole, and a channel for the cable to pass through is provided in the center of the hollow tube; and

and a first bearing and a second bearing are respectively positioned at both ends of the bolt, and are installed between an inner wall of the through hole and an outer wall of the hollow tube such that the hollow tube can rotate within the through hole.

In the bolt as described above, optionally, sealing rings are provided on the outer side of the first bearing and the outer side of the second bearing, respectively.

In the bolt as described above, optionally, the hollow tube is a metal tube, the first bearing and the second bearing are radial bearings, and a hollow space is provided between the first bearing and the second bearing.

In the bolt as described above, optionally, a screw head of the bolt has an outer hexagonal shape, and a thread is formed on an outer circumferential surface of the screw.

In order to achieve the above object, a second aspect of the present invention provides an explosion-proof pressure measurement test apparatus having a test tank providing a closed test environment for the explosion-proof pressure measurement test, the explosion-proof pressure measurement test apparatus having a pressure sensor located in the test tank and a data collection box located outside the test tank, the pressure sensor and the data collection box being connected by a data line, the data line being transferred from the outside of the test tank to the inside of the test tank by a bolt including any one of the first aspect.

In an explosion proof pressure measurement test apparatus as described above, optionally, the bolts pass through and engage the walls of the test slot.

In the explosion-proof pressure measurement test device as described above, optionally, the explosion-proof pressure measurement test device further has a visual display device, the visual display device is used for visualizing the data collected by the data collection box, and the visual display device is located outside the test slot.

In the explosion-proof pressure measurement test apparatus as described above, optionally, the explosion-proof pressure measurement test apparatus is characterized in that the pressure sensor is provided with a power source, and the power source is located inside the test tank.

In the explosion-proof pressure measurement test apparatus as described above, optionally, the data line passes through the hollow tube, and the data line is glued to the hollow tube.

In the explosion-proof pressure measurement test device as described above, optionally, a metal sleeve is installed outside the data line.

According to the bolt with the cable switching function, the rotatable hollow tube is arranged in the bolt body through the bearing, so that the cable switching can be realized, and the sealing effect and the winding prevention effect of the cable are realized.

The invention further provides an explosion-proof pressure testing device which can test the explosion pressure of the explosion-proof shell, and the bolts are arranged in the explosion-proof pressure testing device to play a role in switching cables.

Drawings

The present disclosure will become more apparent with reference to the accompanying drawings. It is to be understood that these drawings are solely for purposes of illustration and are not intended as a definition of the limits of the invention. In the figure:

fig. 1 is a perspective view of a bolt body of an embodiment of a bolt with a cable-switching function according to the present invention;

FIG. 2 is a schematic cross-sectional view of a bolt with a cable transfer function according to the present invention;

FIG. 3 is a schematic system block diagram of one embodiment of an explosion proof pressure measurement apparatus of the present invention.

Reference numerals: 1-a bolt; 11-a sealing ring; 2-a bolt body; 21-head; 22-screw; 23-through holes; 3-hollow tubes; 4-a first bearing; 5-a second bearing; 6-a test tank; 61-a pressure sensor; 62-a data acquisition box; 7-data lines; 8-a visual display device; 9-a power supply; 10-metal sleeve.

Detailed Description

The structure, composition, characteristics, advantages and the like of the bolt having a cable switching function and the explosion-proof pressure measurement test apparatus including the same of the present invention will be described below by way of example with reference to the accompanying drawings and specific embodiments, however, all descriptions should not be construed as limiting the present invention in any way.

Furthermore, to the extent that any individual feature described or implied in the embodiments set forth herein, or any individual feature shown or implied in the figures, the invention still allows any combination or deletion of such features (or equivalents thereof) without any technical hurdle, and further embodiments according to the invention are considered to be within the scope of the disclosure herein.

It should be further noted that the azimuth or positional relationship indicated by the terms "inner", "outer", etc. is based on the azimuth or positional relationship of the bolt having the cable switching function and the explosion-proof pressure measurement test device including the same shown in the drawings, and is merely for convenience of description and simplification of description, and is not indicative or implying that the device or element to be referred must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present disclosure.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

The invention provides a bolt 1 with a cable switching function, wherein the bolt 1 can be installed in different device shells for a cable to pass through for switching, and the cable is led out from the inside of the shells to the outside. As can be seen in connection with fig. 1 and 2, the bolt 1 comprises: a bolt body 2, a hollow tube 3, a first bearing 4 and a second bearing 5. The bolt body 2 has a through hole 23 therethrough, and the hollow tube 3 is inserted into the through hole 23. The first bearing 4 and the second bearing 5 are respectively located at both ends of the bolt 1, and the first bearing 4 and the second bearing 5 are installed between the inner wall of the through hole 23 and the outer wall of the hollow tube 3. The cable can pass through the inside of the hollow tube 3. When the cable is twisted, the hollow tube 3 can rotate along with the cable under the support of the first bearing 4 and the second bearing 5, so that the cable is prevented from being twisted and wound to cause damage or influence the transmission of data, signals, power and the like.

The invention also provides an explosion-proof pressure measurement test device which can test the explosion pressure of the explosion-proof shell. As can be seen from fig. 3, the explosion-proof pressure measurement test device is further provided with a test groove 6, and the explosion-proof shell of the test sample to be tested can be placed in the test groove 6 for testing. A pressure sensor 61 can be arranged in the test tank 6, the pressure sensor 61 is connected with the explosion-proof housing, and the pressure sensor 61 is connected with a data acquisition box 62 and the like outside the test tank 6 through a data line 7. The bolt 1 can be mounted on the wall of the test groove 6, the data wire 7 of the pressure sensor 61 is glued inside the hollow tube 3 of the bolt 1, so that the winding of the data wire 7 is effectively avoided and the tightness of the internal test environment of the test groove 6 is ensured.

Fig. 1 is a schematic perspective view of a bolt body of an embodiment of a bolt with a cable-switching function according to the present invention.

As can be seen from fig. 1, the bolt body 2 of the bolt 1 comprises a head 21 and a shank 22. The head 21 and the screw 22 are integrally formed. The head 21 is intended to be operated by means of a tool or manually when mounting or dismounting the bolt; the screw 22 has an external thread adapted to be screw-fitted with the portion to be mounted.

In the illustrated embodiment, the head 21 has an outer hexagonal shape, the outer hexagonal head 21 being wear resistant and capable of carrying a greater torque, which can increase the service life of the bolt 1. The outer hexagonal head 21 also has the characteristic of convenient disassembly and assembly, and reduces the time and labor cost for disassembling and assembling the bolts. In alternative embodiments, the head may take on other commonly used shapes. For example, the head 21 may be rounded, additionally adding a recess at the end that allows the screwing operation.

Further, the bolt 1 may be mounted in a different device housing or wall, which may have mounting holes at mounting locations with the bolt 1. The mounting hole may be a through hole with internal threads in an inner wall of the mounting hole. Meanwhile, an external thread is formed on the outer circumferential surface of the screw 22, and the bolt 1 can be screwed with the internal thread of a different device under the cooperation of the external thread of the screw 22. In the application of the present application the screw 22 may engage a screw hole in the trial wall.

As can also be seen from fig. 1, the bolt body 2 has a through-hole 23 which extends axially through the head 21 and the threaded spindle 22. As shown in fig. 2, the hollow tube 3 may be installed inside the through hole 23 through the first bearing 4 and the second bearing 5.

Fig. 2 is a schematic cross-sectional view of a bolt with a cable switching function according to the present invention. The figure shows the bolt body 2, the first bearing 4, the second bearing 5 and the hollow tube 3 of the bolt 1. As can be seen from the figure, a through hole 23 in the interior of the bolt extends through the bolt head 21 and the threaded shank 22.

Further, as can be seen from fig. 2, the bolt 1 comprises a hollow tube 3, the hollow tube 3 being mounted in a through hole 23 by means of a bearing. The hollow tube 3 is lightweight, durable and has a high load-carrying capacity. The hollow tube 3 may have a cylindrical shape, and the hollow tube 3 is coaxially and axially inserted in the through hole 23. Meanwhile, the hollow tube 3 is a hollow channel inside, and the channel can be used for a cable to pass through so as to finish the switching of the cable. The hollow tube 3 may be a metal tube or other materials.

As previously described, the hollow tube 3 is mounted in the through hole 23 of the bolt by means of a bearing. In the embodiment of fig. 2, the bearings comprise a first bearing 4 and a second bearing 5. As shown in the drawing, the first bearing 4 and the second bearing 5 are respectively located at both ends of the bolt 1, and the first bearing 4 and the second bearing 5 are installed between the inside of the through hole 23 and the outer wall of the hollow tube 3.

In alternative embodiments, the bearings may be radial bearings to withstand more radial forces and provide relative circumferential rotation. A hollow space may be provided between the first bearing 4 and the second bearing 5 as shown in the figure, so that damage to the bearing and adjacent components when an explosion occurs can be reduced.

Therefore, the bearing allows the hollow tube 3 to rotate relative to the bolt 2, so that under the condition of bolt fixation, the cable can drive the hollow tube 3 to rotate in the bolt, the cable in the hollow tube 3 is prevented from winding, and the anti-winding effect is achieved. In addition, when the bolt 2 is screwed, the cable can not rotate together with the bolt, so that the pressure sensor does not need to rotate together, only one person is required to install the pressure sensor, and the pressure sensor is convenient to install, and saves time and labor.

In the illustrated example, the seal ring 11 is provided outside the first bearing 4 and the second bearing 5. The sealing ring 11 can prolong the service life of the bearing and has the sealing effect, so that foreign matters are effectively prevented from entering the bearing, and the normal operation of the bearing is ensured. The sealing ring also plays a role in sealing the inside and the outside of the test groove.

FIG. 3 is a schematic system block diagram of one embodiment of an explosion proof pressure measurement apparatus of the present invention. As can be seen from the figure, the explosion proof pressure test apparatus comprises a test cell 6 which provides a sealed test environment for the test. The flameproof housing to be tested, the pressure sensor 61, the power supply 9 and the like are placed inside the test tank 6, the data acquisition box 62, the visual display device 8 and the like are arranged outside the test tank 6, and the bolt 1 is used for switching the data line 7 from the inside of the test tank 6 to the outside of the test tank 6.

The explosion-proof pressure testing device is used for testing the explosion pressure of the explosion-proof shell and verifying the compression resistance of the explosion-proof shell in an underground explosive environment of a coal mine, so that the explosion risk is reduced, and the explosion occurrence probability and the destructive power are reduced.

As shown in fig. 3, the test cell 6 of the explosion-proof pressure test device is accompanied by an internal closed space, which can provide a closed test environment for the explosion-proof pressure test. The walls of the test slot 6 also have one or more openings extending through the interior and exterior of the test slot 6 for receiving bolts having a transfer function, and internal threads are present in the openings.

At the same time, the power supply 9 and the pressure sensor 61 are located in the closed space inside the test cell 6. The pressure sensor 61 is mounted on the inner wall of the flameproof housing for measuring the pressure value of the flameproof housing during the test. In an alternative embodiment, the number of the pressure sensors is not limited to one, but may be plural in order to ensure that the detection result is accurate. The power supply 9 is also mounted in the test cell 6, for example on its inner wall, and provides power to the pressure sensor 61. Since the power supply 9 and the pressure sensor 61 are both located in the explosion test environment inside the test tank, the power supply 9 and the pressure sensor 61 are connected to each other by an explosion-proof cable in order to ensure the safety and stability of power transmission.

In an alternative embodiment, the explosion proof pressure test apparatus may further comprise a data acquisition box 62, which data acquisition box 62 may be used to receive and process data from the pressure sensor 61. While the data acquisition box 62 may be located at any suitable location outside the test cell 6 in order to allow the data acquisition box 62 to better receive the data from the pressure sensor 61.

Meanwhile, the explosion-proof pressure measuring device further comprises a visual display device 8. The visual display device 8 is connected to the data acquisition box 62 by a cable for visualizing the data acquired by the data acquisition box 62. The visual display device 8 is also located at a suitable position outside the test cell 6.

Further, the explosion-proof pressure measuring device has a bolt 1 as described in fig. 1 and 2. The bolt 1 can be screwed into the wall of the test cell 6 from the outside of the test cell 6 by means of an external thread on the outer circumferential surface of the threaded rod 22 cooperating with an internal thread in the opening of the test cell 6, the bolt 1 being intended for switching a data line 7 passing through the inside of the test cell 6 and the outside of the test cell 6.

As can be seen from fig. 3, the explosion-proof pressure measuring device also has a data line 7 for connecting a data acquisition box 62 located outside the test cell 6 and a pressure sensor 61 located inside the test cell 6. The pressure sensor 61 can transmit data via the data line 7 into the data acquisition box 62. Specifically, the data line 7 is transferred from the outside of the test cell 6 to the inside of the test cell 6 by the bolt 1. In an alternative embodiment, the data line 7 is fixedly glued inside the hollow tube 3 of the bolt 1 in order to provide a better tightness of the test environment. As can be seen from fig. 2, the hollow tube 3 also rotates with the data line by rotation of the first bearing 4 and the second bearing 5. Therefore, the hollow tube 3 can also rotate along with the data wires 7 fixed by the glue seal, and torsion damage among the data wires can be avoided. Meanwhile, a metal sleeve 10 may be further installed outside the data line to prevent damage caused by exposure thereof to the outside, for protecting the data line.

The test procedure is as follows:

s1: the power supply 9 and the pressure sensor 61 are arranged in the test groove 6, the data acquisition box 62 and the visual display device 8 are arranged outside the test groove 6, the bolt 1 is screwed into the groove wall of the test groove 6 from the outside of the test groove, meanwhile, the data wire 7 is led out from the pressure sensor 61, and is led out to the data acquisition box 62 through the switching of the bolt 1;

s2: placing a flameproof housing of a test sample to be tested into the test tank 6, and placing a pressure sensor 61 on the flameproof housing to measure the reference pressure of the flameproof housing;

s3: starting a power supply 9 in the test tank 6 to supply power to the pressure sensor 61;

s4: starting an explosion-proof pressure measurement test;

s5: the pressure sensor 61 monitors the reference pressure of the flameproof housing in real time and transmits the reference pressure into the data acquisition box 62 through the data line 7;

s6: the data acquisition box 62 integrates and feeds back the received receipts to the visual display device 8, and the visual display device 8 visually displays the acquired data on a screen.

The bolt with the cable switching function provided by the invention avoids the problem that switching between the sensing data line and the test groove is inconvenient and tool matching is required. The conventional outer hexagon bolt is in a fixed state after being directly punched and glued with the data line, the metal sleeve is not easy to install outside the data line, and the sensing line is easy to knot after long-time use, so that the sensing line is broken and broken. According to the rotation principle of the roller, the bearing, the sealing ring and the pressure measuring line hollow installation tube are added between the through holes of the outer hexagon bolts, and the bearing, the sealing ring and the pressure measuring line hollow installation tube are matched, so that the pressure sensor is always in a static state in the installation process of the tool, the sensing data line is not easy to tie, and a metal sleeve can be connected to the outer part of the sensing data line under the condition of using the tool, so that a more effective protection effect is achieved.

The technical scope of the present invention is not limited to the above description, and those skilled in the art may make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present invention, and these changes and modifications should be included in the scope of the present invention.

Claims (10)

1. A bolt with a cable switching function, characterized in that the bolt (1) comprises:

a bolt body (2), the bolt body (2) having a head (21) and a screw (22), and the bolt body (2) having a through hole (23) penetrating the head (21) and the screw (22) in an axial direction;

-a hollow tube (3), said hollow tube (3) being axially inserted in said through hole (23), the centre of said hollow tube (3) being provided with a passage for said cable to pass through; and

first bearing (4) and second bearing (5), first bearing (4) and second bearing (5) are located respectively in the both ends of bolt (1), and first bearing (4) and second bearing (5) are installed between inner wall of through-hole (23) and the outer wall of hollow tube (3), make hollow tube (3) can be in through-hole (23) internal rotation.

2. Bolt according to claim 1, characterized in that sealing rings (11) are provided on the outside of the first bearing (4) and on the outside of the second bearing (5), respectively.

3. Bolt according to claim 1, characterized in that the hollow tube (3) is a metal tube, the first bearing (4) and the second bearing (5) are radial bearings, and a hollow space is provided between the first bearing (4) and the second bearing (5).

4. The bolt according to claim 1, wherein the head of the bolt (1) has an outer hexagonal shape, and a thread is formed on the outer peripheral surface of the screw (22).

5. An explosion-proof pressure measurement test device, characterized in that, the explosion-proof pressure measurement test device has test tank (6), test tank (6) is for explosion-proof pressure measurement test provides confined test environment, explosion-proof pressure measurement test device has be located pressure sensor (61) in test tank (6) and be located data acquisition box (62) outside test tank (6), connect through data line (7) between pressure sensor (61) and data acquisition box (62), data line (7) are through bolt (1) according to any one of claims 1 to 4 from outside test tank (6) switching to the inside of test tank (6).

6. Explosion-proof pressure testing device according to claim 5, characterized in that the bolt (1) passes through and engages on the wall of the test slot (6).

7. The explosion-proof pressure test device according to claim 5, characterized in that it further has a visual display device (8), the visual display device (8) being used for visualizing the data acquired by the data acquisition box (62), and the visual display device (8) being located outside the test tank (6).

8. The explosion-proof pressure testing device according to claim 5, characterized in that the explosion-proof pressure testing device is provided with a power supply (9) for the pressure sensor (61), which power supply (9) is located inside the test tank (6).

9. The explosion-proof pressure measurement test device according to claim 5, wherein the data line (7) passes through the hollow tube (3), and the data line (7) is glued to the hollow tube (3).

10. The explosion-proof pressure measurement test device according to claim 5, wherein a metal sleeve (10) is arranged outside the data wire (7).