A device for directly measuring gas content

Abstract

The present invention discloses a direct gas content determination device, comprising: a crushing device, which comprises: a crushing box, a box cover, a crushing actuator and a filtering mechanism, wherein a coal sample is contained in the crushing box, the top of the crushing box is open, a discharge port is provided at the bottom of the crushing box, the top of the crushing box is buckled by the box cover, a crushing actuator is installed on the box cover, the crushing actuator is used to crush the coal sample, an exhaust hole is provided in the box cover, a filtering mechanism is installed at the exhaust hole, and the filtering mechanism is only for gas to pass; an air intake pipe, one end of which is connected to the exhaust hole; and a gas analysis device, the other end of the air intake pipe is connected to the gas analysis device. The direct gas content determination device solves the problem in the prior art that the gas analyzer and the air intake pipe are easily blocked due to the gas pump directly descending to draw the gas in the sealed crushing chamber into the gas analyzer.

Description

Technical Field

[0001] The invention relates to gas detection equipment, in particular to a gas content direct measurement device. Background Art

[0002] The gas content direct measuring device divides the coal seam gas content into: gas loss amount W1, normal pressure gas desorption amount W2, crushed gas desorption amount W3 and residual gas amount Wc.

[0003] By drilling a core hole into the coal seam, the coal core is taken out from the deep part of the coal seam by using the underground coring system and sealed in the coal sample tube in time; the gas desorption rate of the coal sample is measured underground and the loss time is recorded, and the gas loss amount W1 is calculated according to the desorption law; the coal sample tube containing the coal sample is brought to the laboratory for normal pressure desorption, and the gas amount W21 released from the coal sample tube is measured, and the coal core gas desorption amount W2 is calculated with the gas desorption amount W22 measured underground; after weighing the total weight of the coal sample, a secondary coal sample is weighed for normal pressure crushing desorption, and the crushing gas desorption amount W3 is calculated based on this; the desorbable gas content Wa is: Wa = W1 + W2 + W3. The residual gas amount Wc is calculated using the Langmuir formula, and the coal seam gas content W = Wa + Wc can be obtained.

[0004] The gas content direct determination device is composed of a downhole sampling device, a downhole desorption device, a ground desorption device, a weighing device, a coal sample crushing device, a moisture determination device, a data processing system and other parts.

[0005] The Chinese patent discloses a gas content rapid tester with application number CN201920793659.5, which includes a gas desorption instrument, a sealed crushing chamber and a motor. There are two sealed crushing chambers, and an eccentrically arranged rotating shaft is fixedly connected below the sealed crushing chamber. The outer periphery of the rotating shaft is fixedly connected to a transmission gear, which is connected by a transmission chain. The bottom end of one of the rotating shafts is provided with disc teeth, and one end of the rotating main shaft of the motor is provided with bevel teeth, and the disc teeth mesh with the bevel teeth. The rotating main shaft of the motor drives one of the rotating shafts to rotate, and this rotating shaft drives the other rotating shaft to rotate synchronously, so that the sealed crushing chamber rotates eccentrically at high speed, and the crushing ring and the crushing hammer in the sealed crushing chamber fully impact and crush the coal sample. After the coal sample in the sealed crushing chamber is crushed, although the gas content can be detected after the coal sample is crushed, the following disadvantages still exist:

[0006] Since a lot of dust will be generated when the coal sample is crushed, when the vacuum pump directly draws away the gas, the dust will be sucked away into the air intake pipe and the gas analyzer, which will then cause the air intake pipe and the gas analyzer to be blocked, making the entire measurement work impossible. Summary of the invention

[0007] The present invention provides a gas content direct measuring device to solve the problem in the prior art that the gas analyzer and the air intake pipe are easily blocked because the gas in the sealed crushing chamber is directly sucked into the gas analyzer by a vacuum pump.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] The present invention discloses a device for directly determining gas content, comprising: a pulverizing device, which comprises: a pulverizing box, a box cover, a pulverizing actuator and a filtering mechanism, wherein a coal sample is contained in the pulverizing box, the top of the pulverizing box is open, a discharge port is provided at the bottom of the pulverizing box, the top of the pulverizing box is buckled by the box cover, a pulverizing actuator is installed on the box cover, the pulverizing actuator is used to pulverize the coal sample, an exhaust hole is provided in the box cover, a filtering mechanism is installed at the exhaust hole, and the filtering mechanism is only for gas to pass through; an air inlet pipe, one end of which is connected to the exhaust hole; and a gas analysis device, the other end of the air inlet pipe is connected to the gas analysis device.

[0010] Preferably, the filter mechanism comprises: a mounting cover and a filter cloth, the mounting cover is mounted on the inner wall of the box cover by a first screw, the box cover is an annular structure, and the box cover presses the filter cloth onto the exhaust hole.

[0011] Preferably, a first pressing step for pressing the filter cloth is formed on the inner wall of the mounting cover.

[0012] Preferably, a pin is protruding from the first pressing step, and the pin passes through the edge of the filter cloth.

[0013] Preferably, a sealing ring is pressed between the mounting cover and the inner wall of the box cover.

[0014] Preferably, a second clamping step is formed in a depression in the mounting cover, the second clamping step is located below the first clamping step, a mounting frame is clamped on the second clamping step, a first permanent magnet is mounted in the mounting frame, the mounting frame can allow gas to pass through, an annular disk is mounted on the top of the box cover, a second permanent magnet is mounted in the annular disk, and the axis center line of the annular disk is aligned with the axis center line of the mounting frame.

[0015] Preferably, the annular disk surrounds the air inlet pipe.

[0016] Preferably, the air inlet pipe protrudes outward to form a convex ring, and the section of the air inlet pipe located below the convex ring is divided into a large section and a small section, the outer diameter of the large section is larger than the outer diameter of the small section, the outer wall of the large section guides the annular disk to rotate, and the outer sleeve of the small section is provided with a support ring, the bottom of the support ring extends to form a mounting ring, and the mounting ring is provided with at least two threaded holes, the outer wall of the small section protrudes to form a boss, and the inner wall of the support ring is recessed to form a slot for the boss to be inserted, and the bottom end of the slot is connected to a rotation groove, and the boss is screwed into the rotation groove.

[0017] Preferably, the mounting frame includes: a guide ring and connecting ribs, the guide ring is in close contact with the second clamping step, a plurality of connecting ribs are connected to the inner wall of the guide ring, the outer wall of the guide ring is recessed to form a first mounting groove extending into the connecting ribs, and the first permanent magnet is installed in the first mounting groove.

[0018] Preferably, the inner diameter of the guide ring is smaller than or equal to the inner diameter of the second pressing step.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] By setting the filter mechanism at the exhaust hole, when the gas analysis equipment extracts the gas in the crushing box, the filter mechanism can block the dust in the crushing box, avoiding the blockage of the gas loading and unloading equipment and the air intake pipe caused by the setting of dust, and ensuring that subsequent work can proceed normally.

[0021] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of a pulverizing chamber in a gas content direct determination device;

[0023] Figure 2 for Figure 1 A magnified view of the filter mechanism in the middle;

[0024] Figure 3 It is a structural schematic diagram of the box cover and the filter mechanism in the gas content direct measurement device;

[0025] Figure 4 It is a schematic diagram of the structure of the mounting cover and the mounting frame;

[0026] Figure 5 is a structural schematic diagram of the mounting frame;

[0027] Figure 6 It is a schematic diagram of the structure of the air intake pipe and the annular disk;

[0028] Figure 7 for Figure 6 Schematic diagram of the structure after the middle support ring and the mounting ring are disassembled;

[0029] Figure 8 It is a schematic diagram of the structure of the support ring and the mounting ring.

[0030] Figure numerals: crushing box 1, box cover 2, filtering mechanism 3, mounting cover 31, first clamping step 311, second clamping step 312, pin 313, filter cloth 32, sealing ring 33, mounting frame 341, first mounting groove 340, first permanent magnet 342, annular disk 343, second permanent magnet 344, crushing actuator 4, air intake pipe 5, convex ring 50, support ring 51, slot 511, rotating groove 512, mounting ring 52. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and functions of the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0032] like Figures 1 to 8 As shown, the present invention discloses a direct gas content determination device, including: a crushing device, which includes: a crushing box 1, a box cover 2, a crushing actuator 4 and a filtering mechanism 3, the crushing box 1 contains a coal sample, the top of the crushing box 1 is open, and a discharge port is provided at the bottom of the crushing box 1, the top of the crushing box 1 is buckled by the box cover 2, and the crushing actuator 4 is installed on the box cover 2, and the crushing actuator 4 is used to crush the coal sample, and an exhaust hole is provided in the box cover 2, and a filtering mechanism 3 is installed at the exhaust hole, and the filtering mechanism 3 is only for gas to pass; an air intake pipe 5, one end of which is connected to the exhaust hole; and a gas analysis device, and the other end of the air intake pipe 5 is connected to the gas analysis device. The crushing actuator 4 includes: a motor and a crushing knife, the motor is installed outside the box cover 2, the output shaft of the motor is fixed to the crushing knife located in the crushing box 1, the motor drives the crushing knife to rotate, and the output shaft of the motor passes through the box cover 2.

[0033] The filter mechanism 3 includes: a mounting cover 31 and a filter cloth 32. The mounting cover 31 is mounted on the inner wall of the box cover 2 by a first screw. The box cover 2 is an annular structure. The box cover 2 presses the filter cloth 32 against the exhaust hole. After the mounting cover 31 is buckled on the box cover 2, the mounting cover 31 can press the filter cloth 32 against the position of closing the exhaust hole, and the filter cloth 32 is realized to only allow gas to pass through.

[0034] The inner wall of the mounting cover 31 is formed with a first pressing step 311 for pressing the filter cloth 32. The first pressing step 311 is provided to press the filter bag.

[0035] The first pressing step 311 is protruded with a pin 313, which passes through the edge of the filter cloth 32. The pin 313 hooks the filter cloth 32, thereby preventing the filter cloth 32 from moving toward the center.

[0036] A sealing ring 33 is pressed tightly between the mounting cover 31 and the inner wall of the box cover 2, thereby improving the sealing performance.

[0037] A second clamping step 312 is formed in a depression in the mounting cover 31, and the second clamping step 312 is located below the first clamping step 311. A mounting frame 341 is clamped on the second clamping step 312, and a first permanent magnet 342 is installed in the mounting frame 341. The mounting frame 341 can allow gas to pass through. An annular disk 343 is installed on the top of the box cover 2, and a second permanent magnet 344 is installed in the annular disk 343. The axis center line of the annular disk 343 is aligned with the axis center line of the mounting frame 341. Since the coal sample contains gas, in order to avoid gas leakage and to avoid explosion accidents caused by installing electric drive equipment in the box cover 2 and the crushing box 1, and at the same time, to avoid the filter cloth 32 from blocking the passage of gas after long-term use, a mounting frame 341 with a first permanent magnet 342 is provided to cooperate with an annular disk 343 with a second permanent magnet 344. The first permanent magnet 342 and the second permanent magnet 344 have mutual attraction. When the annular disk 343 of the second permanent magnet 344 is rotated, the mounting frame 341 with the first permanent magnet 342 rotates together, so that the mounting frame 341 sweeps across the filter screen, thereby avoiding dust deposition on the filter screen and causing blockage of the filter cloth 32.

[0038] The annular disk 343 surrounds the outside of the air inlet pipe 5. The rotation of the annular disk 343 is guided by the air inlet pipe 5.

[0039] The air inlet pipe 5 protrudes from the outside to form a convex ring 50, and the section of the air inlet pipe 5 located below the convex ring 50 is divided into a large section and a small section. The outer diameter of the large section is larger than the outer diameter of the small section. The outer wall of the large section guides the annular disk 343 to rotate, and the outer sleeve of the small section is provided with a support ring 51. The bottom of the support ring 51 extends to form a mounting ring 52, and the mounting ring 52 is provided with at least two threaded holes. The outer wall of the small section protrudes to form a boss, and the inner wall of the support ring 51 is recessed to form a slot 511 for the boss to be inserted into. The bottom end of the slot 511 is connected to a rotation groove 512, and the boss is screwed into the rotation groove 512.

[0040] The annular disk 343 includes: a disk body and a disk cover. The top surface of the disk body is recessed to form a second mounting groove. The second permanent magnet 344 is installed in the second mounting groove. The disk body is buckled with a disk cover, which buckles the second mounting groove. An insert block is protruded from the disk cover, which is inserted into the disk body. The disk body and the disk cover rotate together.

[0041] When installing the ring 52-shaped disk 343 and the intake pipe 5, first, place the second permanent magnet 344 in the second installation groove; then, buckle the disk cover and the disk body; then, the intake pipe 5 passes through the disk cover and the disk body in turn (the boss does not block the disk cover and the disk body from passing through); then, put the support ring 51 and the installation ring 52 on the intake pipe 5. During this process, first insert the boss into the slot 511, and then rotate the support ring 51 and the installation ring 52. The boss is located in the rotating groove 512, and the inner wall of the rotating groove 512 hooks the boss; finally, pull the support ring 51 and the installation ring 52, and the inner wall of the rotating groove 512 drives the intake pipe 5 to approach the box cover 2 through the boss, and the intake pipe 5 is pressed against the box cover 2, so that the annular disk 343, the second permanent magnet 344 and the intake pipe 5 are installed together, thereby improving the installation efficiency. A large section of the outer wall of the intake pipe 5 guides the rotation of the annular disk 343 and the second permanent magnet 344 , thereby improving the subsequent stability of the annular disk 343 and the second permanent magnet 344 .

[0042] The mounting frame 341 includes: a guide ring and connecting ribs. The guide ring is in close contact with the second pressing step 312. A plurality of connecting ribs are connected to the inner wall of the guide ring. The outer wall of the guide ring is recessed to form a first mounting groove 340 extending into the connecting ribs. The first permanent magnet 342 is installed in the first mounting groove 340. The setting of the guide ring enables the second pressing step 312 to be fully supported, that is, the second pressing step 312 is fully covered to prevent dust from entering the second pressing step 312. The setting of the connecting ribs enables the mounting frame 341 to rotate less than 90 degrees to pass through the filter surface of the filter cloth 32, so that the cleaning work can be quickly achieved.

[0043] The inner diameter of the guide ring is smaller than or equal to the inner diameter of the second pressing step 312, so that the second pressing step 312 is fully covered by the guide ring.

[0044] In the present application, firstly, in order to avoid the blockage of the gas analysis device and the intake pipe 5, a filter mechanism 3 is provided; then, in order to design a filter mechanism 3 with a simple structure, a mounting cover 31 and a filter cloth 32 are provided, and at the same time, the filter cloth 32 is pressed against the inner wall of the box cover 2, thereby facilitating the installation of the filter cloth 32; then, due to long-term use, dust will be blocked and deposited on the surface of the filter cloth 32, so a mounting frame 341 with a first permanent magnet 342 and an annular disk 343 with a second permanent magnet 344 (constituting a dust scraping mechanism) are provided, and at the same time, the electric drive device is avoided from being arranged in the crushing box 1 and the box cover 2, so that the electric drive device can be increased. The device is arranged outside the box cover 2, avoiding the risk of explosion caused by the internal arrangement of the electric drive device, and at the same time avoiding the need to add holes on the box cover 2 due to the arrangement of the dust scraping mechanism, reducing the risk of air leakage, and rotating the annular disk 343 with the second permanent magnet 344 can make the mounting frame 341 with the first permanent magnet 342 located in the box cover 2 and the crushing box 1 rotate, so that the dust scraping function can be realized; then, in order to make the second permanent magnet 344 rotate smoothly after being installed on the annular disk 343, the annular disk 343 with the second permanent magnet 344 is arranged outside the intake pipe 5; then, in order to realize the second permanent magnet 344 being installed in the annular disk 343 , and to improve the installation efficiency, an annular disk 343 is provided, including: a disk body and a disk cover, the insert block on the disk cover is inserted into the disk body, so that the disk body, the disk cover and the second permanent magnet 344 rotate together, and the second permanent magnet 344 is prevented from being worn due to the rotation relative to the disk body or the disk cover; then, in order to prevent the installation of the annular disk 343 from blocking the installation of the intake pipe 5, a support ring 51 and a mounting ring 52 are designed, and the support ring 51 and the mounting ring 52 are designed as an integrated design, and a boss is designed at the same time. When the support ring 51 and the mounting ring 52 are installed in place, the support ring 51 and the mounting ring 52 can hook the boss through the boss, and finally the support ring 51 and the mounting ring 52 press the intake pipe 5 onto the box cover 2, It is ensured that the annular disk 343, the second permanent magnet 344 and the intake pipe 5 are installed and positioned on the box cover 2 together through the mounting ring 52; then, in order to realize the installation of the first permanent magnet 342 and to ensure that the first permanent magnet 342 can have a sufficiently long piece to be installed in the mounting frame 341, a guide ring and connecting ribs are designed. After the guide ring is installed at the second clamping step 312, it can rotate under the guidance in the mounting cover 31, and the connecting ribs allow the gas to pass through. At the same time, after the mounting frame 341 is rotated a certain angle, all the connecting ribs can sweep over the entire filter cloth 32; finally, in order to prevent dust from accumulating on the second clamping step 312, a guide ring is set to fully cover the second clamping step 312.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A gas content direct measurement device, characterized in that: include: A pulverizing device, comprising: a pulverizing box (1), a box cover (2), a pulverizing actuator (4) and a filtering mechanism (3), wherein the pulverizing box (1) contains a coal sample, the top of the pulverizing box (1) is open, a discharge port is provided at the bottom of the pulverizing box (1), the top of the pulverizing box (1) is buckled by the box cover (2), a pulverizing actuator (4) is installed on the box cover (2), the pulverizing actuator (4) is used to pulverize the coal sample, an exhaust hole is provided in the box cover (2), a filtering mechanism (3) is installed at the exhaust hole, and the filtering mechanism (3) only allows gas to pass through; an air inlet pipe (5), one end of which is connected to the exhaust hole; and A gas analysis device, wherein the other end of the air inlet pipe (5) is connected to the gas analysis device; The filter mechanism (3) comprises: a mounting cover (31) and a filter cloth (32); the mounting cover (31) is mounted on the inner wall of the box cover (2) by means of a first screw; the box cover (2) is an annular structure; the box cover (2) presses the filter cloth (32) against the exhaust hole; The inner wall of the mounting cover (31) is formed with a first pressing step (311) for pressing the filter cloth (32); A second pressing step (312) is formed in a recess in the mounting cover (31), the second pressing step (312) is located below the first pressing step (311), a mounting frame (341) is pressed on the second pressing step (312), a first permanent magnet (342) is mounted in the mounting frame (341), the mounting frame (341) can allow gas to pass through, an annular disk (343) is mounted on the top of the box cover (2), a second permanent magnet (344) is mounted in the annular disk (343), and the axis center line of the annular disk (343) is aligned with the axis center line of the mounting frame (341); The annular disk (343) surrounds the outside of the air inlet pipe (5); The air inlet pipe (5) protrudes from the outside to form a convex ring (50), and the section of the air inlet pipe (5) located below the convex ring (50) is divided into a large section and a small section, the outer diameter of the large section is larger than the outer diameter of the small section, the outer wall of the large section guides the annular disk (343) to rotate, and the outer sleeve of the small section is provided with a support ring (51), the bottom of the support ring (51) extends to form a mounting ring (52), and the mounting ring (52) is provided with at least two threaded holes, the outer wall of the small section protrudes to form a boss, and the inner wall of the support ring (51) is recessed to form a slot (511) for the boss to be inserted, and the bottom end of the slot (511) is connected to a rotation groove (512), and the boss is screwed into the rotation groove (512); The mounting frame (341) comprises: a guide ring and connecting ribs, the guide ring is in close contact with the second pressing step (312), a plurality of connecting ribs are connected to the inner wall of the guide ring, the outer wall of the guide ring is recessed to form a first mounting groove (340) extending into the connecting ribs, and a first permanent magnet (342) is installed in the first mounting groove (340); The inner diameter of the guide ring is smaller than or equal to the inner diameter of the second pressing step (312).

2. A gas content direct measuring device according to claim 1, characterized in that: A pin (313) is protruded from the first pressing step (311), and the pin (313) passes through the edge of the filter cloth (32).

3. A gas content direct measuring device according to claim 2, characterized in that: A sealing ring (33) is tightly pressed between the mounting cover (31) and the inner wall of the box cover (2).

Images