Automatic sealing device for explosive combustible gas safety test

Abstract

The invention relates to the technical field of underground blasting safety testing, in particular to an automatic sealing device for an explosive combustible gas safety degree test. A moving chamber and a winding and unwinding roller are additionally arranged between a traditional explosion chamber and an explosion venting chamber, and the moving chamber is close to and away from the explosion venting chamber and the explosion chamber, so that sealing cloth unfolded at an end opening of the explosion chamber is pressed while the moving chamber is in butt joint with the explosion chamber, and automatic sealing of the explosion chamber is completed. After the experiment is finished, the moving chamber returns to the explosion venting chamber, at the moment, the winding roller and the roll feeding roller release and deliver the sealing cloth while winding the sealing cloth, and then the part, coinciding with the port of the explosion chamber, of the sealing cloth is replaced. The whole sealing process from fixing to replacing of the sealing cloth does not need manual participation, the whole replacing and fixing process is rapid and convenient, the consumed time of early-stage preparation work of a test is effectively shortened, and the experiment efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of underground blasting safety testing, and in particular to an automatic sealing device for explosive combustible gas safety testing. Background Art

[0002] The combustible gas safety test of explosives is to determine the safety of explosives by simulating the existence of combustible gas in coal mines to see whether the explosion of explosives will cause combustible gas explosion. Therefore, the combustible gas safety of explosives is an important indicator for the safety inspection of explosives permitted in coal mines. The combustible gas safety test is used to analyze and verify the combustible gas safety of explosives permitted in coal mines and evaluate the safety of explosives permitted in coal mines.

[0003] The specific test method is to seal the open end of the explosion chamber with a sealing cloth, so that the interior of the explosion chamber is in a closed environment, and then introduce experimental methane into it until the methane in the explosion chamber is evenly mixed and meets the specified standard requirements, so as to simulate the environment of combustible gas in coal mines. Then ignite the explosives in the explosion chamber. If an explosion occurs, the shock wave generated by the explosion will break through the sealing cloth between the explosion chamber and the explosion venting chamber, and release pressure through the explosion venting chamber.

[0004] At present, the sealing work of the explosion chamber of the flammable gas safety test is done manually by drilling into the test tunnel from the open end of the outdoor explosion relief chamber, fixing the pre-cut sealing cloth on the end face flange of the explosion chamber, and sealing the explosion chamber. That is to say, before each test, it is necessary to manually go through the process of cutting and loading and unloading the sealing cloth. The whole process is time-consuming and labor-intensive, which seriously slows down the efficiency of the experimental test.

[0005] In view of this, the present invention provides an automatic sealing device for explosive combustible gas safety test, which improves the above technical problems. Summary of the invention

[0006] The technical problem to be solved by the present invention is that the sealing work of the traditional combustible gas safety test explosion chamber is completed manually, and before each test, it is necessary to go through the process of cutting and loading and unloading the sealing cloth, which is labor-intensive and time-consuming, resulting in a relatively long preliminary preparation work for the test and low test efficiency.

[0007] To this end, the present invention provides an automatic sealing device for explosive and combustible gas safety test, comprising an explosion chamber and an explosion relief chamber with both ends open, wherein one end of the explosion chamber is sealed and fixedly installed with a firing mortar, and the other end is open and opposite to the explosion relief chamber in the air; a mobile chamber is slidably installed in one end of the explosion relief chamber close to the explosion chamber, and the mobile chamber can be driven by a cylinder installed on the outer surface of the explosion relief chamber to extend outward from the explosion relief chamber until it docks with the explosion chamber, forming an experimental simulation tunnel composed of the explosion chamber, the mobile chamber and the explosion relief chamber; a gas circulation system for adjusting the air composition inside the explosion chamber is also arranged outside the explosion chamber;

[0008] A long strip of sealing cloth is also arranged between the explosion chamber and the moving chamber to cover the open end of the explosion chamber. The upper end of the sealing cloth is guided by the auxiliary wheel and then wound on the feeding roller, and the lower end of the sealing cloth is guided by the auxiliary wheel and then wound on the winding roller. The feeding roller delivers the sealing cloth while the winding roller winds up the sealing cloth to translate and replace the portion of the sealing cloth that overlaps with the open end of the explosion chamber.

[0009] Preferably, the sealing cloth is any one of a plastic film or kraft paper.

[0010] Preferably, an annular groove is provided on the open end face of the explosion chamber, and a dividing edge is provided in the annular groove, and the dividing edge divides the annular groove into an inner annular groove and an outer annular groove from the inside to the outside; an end face of the mobile chamber close to the explosion chamber is provided with an inner convex ridge and an outer convex ridge facing the inner annular groove and the outer annular groove.

[0011] Preferably, an annular groove is provided on the open end surface of the explosion chamber, a dividing edge is provided in the annular groove, and the dividing edge divides the annular groove into an inner annular groove and an outer annular groove from inside to outside; an annular blade is also provided in the outer annular groove;

[0012] The end surface of the moving chamber close to the explosion chamber is provided with an inner convex ridge corresponding to the inner annular groove, and an extrusion ridge corresponding to the annular blade, and the height of the inner convex ridge is higher than the extrusion ridge, so that the inner convex ridge can first engage with the inner annular groove during the docking process between the moving chamber and the explosion chamber.

[0013] Preferably, an annular groove is provided on the open end surface of the explosion chamber, a dividing edge is provided in the annular groove, and the dividing edge divides the annular groove into an inner annular groove and an outer annular groove from inside to outside; an annular blade is also provided in the outer annular groove;

[0014] The end surface of the moving chamber close to the explosion chamber is provided with an inner convex ridge corresponding to the inner annular groove, and a plurality of extrusion wheels are provided corresponding to the annular blade, and the height of the inner convex ridge is higher than the extrusion wheel, so that the inner convex ridge can first engage with the inner annular groove during the docking process between the moving chamber and the explosion chamber;

[0015] The extrusion wheel is connected to the end surface of the moving chamber through a spring telescopic structure;

[0016] The moving chamber rotates in cooperation with the self-rotating structure and drives the extrusion wheel to roll along the annular blade.

[0017] Preferably, the cutting edge of the annular blade does not extend out of the annular groove.

[0018] Preferably, the self-rotation structure comprises a plurality of track grooves provided on the outer surface of the moving chamber, and a limit slider provided on the outer wall of the explosion relief chamber corresponding to the track grooves; the limit slider is inserted into the track groove, and changes the circumferential angle of the moving chamber to deflect it by sliding relative to the groove wall of the track groove;

[0019] The extended end of the oil cylinder is a T-shaped structure, and the T-shaped structure slides with the T-shaped groove corresponding to the back of the end surface of the moving chamber, ensuring that the oil cylinder will not interfere with the circumferentially rotating moving chamber during the process of pushing and pulling the moving chamber horizontally.

[0020] Preferably, the wheel surface of the extrusion wheel is V-shaped.

[0021] Preferably, the deflection angle of the mobile chamber multiplied by the number of extrusion wheels is equal to 360°.

[0022] The beneficial effects of the present invention are as follows:

[0023] The present invention adds a mobile chamber and a winding and delivery roller between the traditional explosion chamber and the explosion venting chamber, and utilizes the proximity and distance between the explosion venting chamber and the explosion chamber to achieve the docking of the mobile chamber with the explosion chamber while pressing the sealing cloth deployed at the port of the explosion chamber, thereby completing the automatic sealing of the explosion chamber. When the experiment is over, the mobile chamber returns to the explosion venting chamber. At this time, the winding roller and the delivery roller release and deliver the sealing cloth while winding up the sealing cloth, and then replace the portion of the sealing cloth that overlaps with the port of the explosion chamber. The entire sealing process, from fixing to replacing the sealing cloth, does not require manual participation, and the entire replacement and fixing process is fast and convenient, which effectively shortens the time spent on the preliminary preparation work of the test and improves the experimental efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a side view of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the three-dimensional structure of the simulated laneway of the present invention;

[0026] Figure 3 It is a schematic diagram of the explosion relief chamber structure of the present invention;

[0027] Figure 4 It is a side view of the mobile room of the present invention;

[0028] Figure 5 This is a detailed diagram showing the explosion chamber port in the first embodiment of the present invention;

[0029] Figure 6 It is a detailed display diagram of the explosion chamber port in the second and third embodiments of the present invention;

[0030] In the figure: 1. explosion chamber; 2. explosion venting chamber; 3. moving chamber; 4. launching mortar; 5. oil cylinder; 6. sealing cloth; 7. feeding roller; 8. winding roller; 9. annular groove; 901, inner annular groove; 902, outer annular groove; 10, separating edge; 11, annular blade; 12, track groove; 13, limiting slider; 14, auxiliary wheel; 15, extrusion wheel. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention more clear, they will be described in detail below in conjunction with specific embodiments and drawings.

[0032] Embodiment 1:

[0033] like Figure 1-Figure 5 The automatic sealing device for explosive combustible gas safety test shown comprises an explosion chamber 1 and an explosion relief chamber 2 with both ends open, wherein one end of the explosion chamber 1 is sealed and fixedly mounted with a firing mortar 4, and the other end is open and faces the explosion relief chamber 2 in the air; a mobile chamber 3 is slidably mounted in one end of the explosion relief chamber 2 close to the explosion chamber 1, and the mobile chamber 3 can extend outward from the explosion relief chamber 2 under the drive of an oil cylinder 5 mounted on the outer surface of the explosion relief chamber 2 until it docks with the explosion chamber 1, forming an experimental simulated tunnel composed of the explosion chamber 1, the mobile chamber 3 and the explosion relief chamber 2; a gas circulation system for adjusting the air composition inside the explosion chamber 1 is also arranged outside the explosion chamber 1;

[0034] A long strip of sealing cloth 6 is also arranged between the explosion chamber 1 and the moving chamber 3 to cover the open end of the explosion chamber 1. The upper end of the sealing cloth 6 is guided by the auxiliary wheel 14 and then wound on the feeding roller 7. The lower end of the sealing cloth 6 is guided by the auxiliary wheel 14 and then wound on the winding roller 8. The feeding roller 7 delivers the sealing cloth 6 while the winding roller 8 winds up the sealing cloth 6 to translate and replace the portion of the sealing cloth 6 that overlaps with the open end of the explosion chamber 1.

[0035] The sealing cloth 6 is any one of a plastic film and kraft paper.

[0036] An annular groove 9 is provided on the open end face of the explosion chamber 1, and a dividing edge 10 is arranged inside the annular groove 9. The dividing edge 10 divides the annular groove 9 into an inner annular groove 901 and an outer annular groove 902 from the inside to the outside; an end face of the mobile chamber 3 close to the explosion chamber 1 is provided with an inner convex edge and an outer convex edge against the inner annular groove 901 and the outer annular groove 902.

[0037] In the preliminary preparation stage of the simulation experiment, the mobile chamber 3 is pulled back into the explosion relief chamber 2 by the oil cylinder 5, and the explosion relief chamber 1 and the explosion relief chamber 2 are opposite to each other in the air. Therefore, when the feeding roller 7 and the winding roller 8 rotate synchronously by any known method, for example, both are directly driven by a motor, the kraft paper or plastic film between the explosion chamber 1 and the mobile chamber 3 moves toward the winding roller 8, and then the position where the kraft paper and plastic film overlap with the port of the explosion chamber 1 is changed, so as to achieve the purpose of replacing the sealing cloth 6.

[0038] As is known to all, combustible gas needs to be introduced into the explosion chamber 1 before the experiment, and the concentration of the combustible gas in the explosion chamber 1 must reach a preset value, so as to achieve the purpose of simulating the combustible gas environment in the well. The other end of the explosion chamber 1 must be open as a pressure relief surface, so the sealing cloth 6 is required to seal the open end. Figure 1 We can see that it is difficult to completely fit the sealing cloth 6 to the open end of the explosion chamber 1 and completely seal the explosion chamber 1 by only relying on the tensioning and guiding of the auxiliary wheel 14. Once the sealing is not good and the combustible gas leaks, it will not only cause a waste of combustible gas, but more importantly, directly affect the safety of the experimental site.

[0039] Therefore, in order to ensure that the kraft paper or plastic film can be completely attached to the port of the explosion chamber 1 and achieve a good seal of the explosion chamber 1. At this time, the oil cylinder 5 can be directly driven to make the oil cylinder 5 push the mobile chamber 3 to extend outward, and the kraft paper or plastic film at this time happens to be located on the moving path of the mobile chamber 3, so when the mobile chamber 3 slides out of the explosion chamber 2 and gradually approaches the explosion chamber 1, it will simultaneously press the kraft paper or plastic film to approach the port of the explosion chamber 1. When the mobile chamber 3 is completely docked with the port of the explosion chamber 1, part of the kraft paper or plastic film at this time will be clamped in the joint between the mobile chamber 3 and the explosion chamber 1, and then the kraft paper or plastic film will be fixed at the port of the explosion chamber 1. That is, the mobile chamber 3 completes the docking task, and the copper smelting explosion chamber 1 and the explosion chamber 2 form a complete simulated tunnel, and the clamping and fixing of the kraft paper or plastic film is also achieved simultaneously!

[0040] The kraft paper or plastic film is clamped by the moving chamber 3, so it can not only stably cover the open end of the explosion chamber 1, but more importantly, the kraft paper or plastic film will be in closer contact with the port of the explosion chamber 1, and the sealing is also guaranteed.

[0041] In addition, in order to strengthen the clamping fastness and sealing of the above-mentioned kraft paper or plastic film, an annular groove 9 is also provided on the port of the explosion chamber 1, and a dividing ridge 10 is provided in the annular groove 9 to divide the annular groove 9 into two inner and outer annular grooves. At the same time, correspondingly, an inner convex ridge and an outer convex ridge are provided on the end face of the mobile chamber 3 close to the explosion chamber 1. Then, when the mobile chamber 3 is docked with the port of the explosion chamber 1, the inner convex ridge and the outer convex ridge can be correspondingly inserted into the inner annular groove 901 and the outer annular groove 902 on the port of the explosion chamber 1, so that the kraft paper or plastic film in the gap between the mobile chamber 3 and the port of the explosion chamber 1 is also forced to bend into a continuous "S" shape, thereby increasing the contact area between the kraft paper or plastic film and the explosion chamber 1, and further improving the stability of the kraft paper or plastic film being clamped and the sealing of the explosion chamber 1.

[0042] Finally, after the kraft paper or plastic film seals the open end of the explosion chamber 1 under the pressure of the mobile chamber 3, a certain concentration of combustible gas is filled into the explosion chamber 1 through the gas circulation system connected to the outside to simulate the environment of combustible gas in the underground tunnel. After the combustible gas is evenly dispersed in the explosion chamber 1, the test explosive in the mortar 4 is ignited to observe the changes in the explosion chamber 1, thereby completing the explosive combustible gas safety test.

[0043] During the whole experiment, the replacement of kraft paper or plastic film is fully automated, and the sealing ability of the kraft paper or plastic film to the explosion chamber 1 after replacement can be well guaranteed, which greatly shortens the preparation time for the above safety test and improves the test efficiency.

[0044] Embodiment 2:

[0045] like Figure 6 As shown, the difference between Example 2 and Example 1 is that: an annular blade 11 is also provided in the outer annular groove 902; an extrusion ridge is provided on the end surface of the moving chamber 3 close to the explosion chamber 1 opposite to the annular blade 11, and the height of the inner ridge is higher than the extrusion ridge, so that the inner ridge can first engage with the inner annular groove 901 during the docking process between the moving chamber 3 and the explosion chamber 1.

[0046] The reasons for choosing kraft paper or plastic film as the sealing cloth 6 to seal the explosion chamber 1 are as follows:

[0047] First, the price is low and it can be replaced at low cost as a consumable;

[0048] Second, the sealing performance is good. Both have good gas isolation ability, which can ensure that the combustible gas filled in the explosion chamber 1 will not escape from its surface.

[0049] Third, the structural strength is limited. When a violent explosion occurs inside the explosion chamber 1, it can be broken in time by the shock wave, so that the pressure in the explosion chamber 1 can be transferred to the explosion relief chamber 2 in time, and the explosion chamber 1 can be depressurized in time. In this way, it is possible to avoid excessive air pressure in the explosion chamber 1 damaging the internal structure of the explosion chamber 1, thereby extending the service life of the explosion chamber 1 and, more importantly, ensuring the safety of the experimental site.

[0050] However, another problem caused by the limited structural strength is that even if the explosion intensity in the explosion chamber 1 is not high, it may cause deformation of the kraft paper or plastic film. Once deformed, cracks may appear on its surface, and the sealing of the explosion chamber 1 becomes uncontrollable, so it needs to be replaced in time.

[0051] And combined with Figure 1 It can be seen that the kraft paper or plastic film is in the shape of a long strip, so the overlapping portion of the long strip kraft paper or plastic film and the port of the explosion chamber 1 can be directly replaced by only releasing and retracting the roll-feeding roller 7 and the reel-up roller 8. That is, the entire replacement process of the kraft paper or plastic film is continuous, which can further improve the test efficiency.

[0052] In addition, after the kraft paper or plastic film is deformed, the deformed area will be gradually rolled onto the winding drum 8 as the winding drum 8 rolls. The deformed kraft paper or plastic film has a characteristic that it will become larger in volume due to wrinkles or excessive stretching after deformation. This will cause the enlarged kraft paper or plastic film to directly make the surface of the waste kraft paper or plastic film roll on the winding drum 8 uneven after being gathered by the winding drum 8. This unevenness will not only cause the tension of the kraft paper or plastic film to be uncontrollable, but also cause the kraft paper or plastic film to fold, which is not allowed in the method of continuously replacing kraft paper or plastic film.

[0053] Therefore, in order to avoid the inconsistency of the winding radius at the winding roller 8 that may be caused by the continuous replacement of the kraft paper or plastic film, which indirectly affects the unfolding flatness of the kraft paper or plastic film. Therefore, in the second embodiment, an annular blade 11 is also provided in the outer annular groove 902, and the outer convex ridge in the first embodiment is replaced with an extrusion ridge. Then, after the moving chamber 3 is docked with the explosion chamber 1, the inner convex ridge can still press the kraft paper or plastic film into the inner annular groove 901 to complete the fixation of the kraft paper or plastic film; and outside the inner annular groove 901, the kraft paper or plastic film is pressed against the cutting edge of the annular blade 11 by the extrusion of the extrusion ridge, thereby completing the cutting of the kraft paper or plastic film, that is, the part of the kraft paper or plastic film that is prone to deformation is cut off from the whole, thereby preventing the deformed kraft paper or plastic film from being rolled onto the winding roller 8, thereby ensuring the uniformity of the winding radius.

[0054] In addition, in the second embodiment, the cutting of the kraft paper or plastic film has been completed during the docking process between the mobile chamber 3 and the explosion chamber 1. This can also prevent the kraft paper or plastic film overlapping with the port of the explosion chamber 1 from pulling the kraft paper or plastic film outside the explosion chamber 1 when the explosion intensity is high, causing unnecessary deformation and sliding of the kraft paper or plastic film that has not been used. Therefore, it is very necessary to cut the kraft paper or plastic film before the explosion.

[0055] At the same time, in order to avoid the situation where the outer annular blade 11 has completed the cutting of the kraft paper or plastic film before the inner convex ridge has inserted the kraft paper or plastic film into the inner annular groove 901 to complete the fixation, causing the accidental detachment of the cut part of the kraft paper or plastic film, the height of the inner convex ridge is specially set higher than the extrusion ridge, so that the inner convex ridge can first engage with the inner annular groove 901 during the docking process between the moving chamber 3 and the explosion chamber 1, that is, the kraft paper or plastic film is fixed first and then cut.

[0056] Embodiment three:

[0057] The difference between the third embodiment and the second embodiment is that: the end of the moving chamber 3 close to the explosion chamber 1 is provided with a plurality of extrusion wheels 15 facing the annular blade 11, and the height of the inner convex ridge is higher than the extrusion wheel 15, so that the inner convex ridge can first engage with the inner annular groove 901 during the docking process between the moving chamber 3 and the explosion chamber 1;

[0058] The extrusion wheel 15 is connected to the end surface of the moving chamber 3 through a spring telescopic structure;

[0059] The moving chamber 3 rotates with the cooperation of the self-rotating structure and drives the extrusion wheel 15 to roll along the annular blade 11 .

[0060] The self-rotation structure includes a plurality of track grooves 12 provided on the outer surface of the moving chamber 3, and a limit slider 13 provided on the inner wall of the explosion relief chamber 2 corresponding to the track grooves 12; the limit slider 13 is inserted into the track groove 12, and changes the circumferential angle of the moving chamber 3 to deflect it by sliding relative to the groove wall of the track groove 12;

[0061] The extended end of the oil cylinder 5 is a T-shaped structure, and the T-shaped structure slides with the T-shaped groove corresponding to the back of the end surface of the moving chamber 3, ensuring that the oil cylinder 5 will not interfere with the circumferentially rotating moving chamber 3 during the process of pushing the moving chamber 3 to move horizontally.

[0062] The wheel surface of the extrusion wheel 15 is V-shaped.

[0063] The deflection angle of the moving chamber 3 multiplied by the number of the extrusion wheels 15 is equal to 360°.

[0064] In order to avoid the incomplete shearing that may be caused by the extrusion shearing method of the annular blade 11 and the extrusion edge in the second embodiment, the third embodiment provides another dynamic shearing method, that is, the extrusion edge in the second embodiment is replaced with multiple extrusion wheels 15, and the wheel surface of the extrusion wheel 15 is V-shaped, which can be just stuck on the edge of the annular blade 11 to ensure the stability of the movement of the extrusion wheel 15.

[0065] The entire shearing process is still initiated by the oil cylinder 5. When the oil cylinder 5 pushes the mobile chamber 3 to approach the explosion chamber 1, the sliding engagement of the limit slider 13 with the track groove 12 with a certain curvature at the tail end causes the mobile chamber 3 to deflect during the forward movement. At this time, the T-shaped structure at the end of the oil cylinder 5 is slidably engaged with the T-shaped groove on the back of the port of the mobile chamber 3, so it can avoid interfering with the deflection of the mobile chamber 3 during the process of pushing and pulling the mobile chamber 3 by sliding the T-shaped structure in the T-shaped groove.

[0066] At this time, the deflected moving chamber 3 will drive the extrusion wheel 15 to revolve synchronously, and during the revolution, the spring telescopic structure of the extrusion wheel 15 and the end face of the moving chamber 3 will push the extrusion wheel 15 to squeeze the kraft paper or plastic film toward the cutting edge of the annular blade 11 like a car shock absorber, and cooperate with the deflection of the moving chamber 3 to achieve the effect that the extrusion wheel 15 can revolve and deflect on the annular blade 11 while rotating and rolling. The rolled kraft paper or plastic film will be cut due to the extrusion of the extrusion wheel 15.

[0067] The spring telescopic structure is similar to a car shock absorber, which is very common in real life and will not be described in detail herein. The purpose of setting the spring telescopic structure is to enable the extruding wheel 15 to obtain more revolution strokes through its contraction to ensure the integrity of the slitting.

[0068] This rolling cutting method can make the angle at which the kraft paper or plastic film is pressed against the cutting edge of the annular blade 11 be inclined, making it easier to cut the kraft paper or plastic film, thereby ensuring the slitting effect of the kraft paper or plastic film.

[0069] The above descriptions are only preferred embodiments of the present invention. Any modifications and improvements made by those skilled in the art without departing from the principles of the present invention are within the protection scope of the present invention.

Claims

1. Automatic sealing device for explosive combustible gas safety test, characterized by: The invention comprises an explosion chamber (1) and an explosion relief chamber (2) with both ends open. One end of the explosion chamber (1) is sealed and fixedly mounted with a firing mortar (4), while the other end is open and faces the explosion relief chamber (2) in the air. A movable chamber (3) is slidably mounted in the end of the explosion relief chamber (2) close to the explosion chamber (1). The movable chamber (3) can be driven by an oil cylinder (5) mounted on the outer surface of the explosion relief chamber (2) to extend outward from the explosion relief chamber (2) until it docks with the explosion chamber (1), thereby forming an experimental simulation tunnel consisting of the explosion chamber (1), the movable chamber (3) and the explosion relief chamber (2). A gas circulation system for adjusting the air composition inside the explosion chamber (1) is also arranged outside the explosion chamber (1). A long strip of sealing cloth (6) is also provided between the explosion chamber (1) and the moving chamber (3) to cover the open end of the explosion chamber (1). The upper end of the sealing cloth (6) is guided by an auxiliary wheel (14) and then wound on a delivery roller (7). The lower end of the sealing cloth (6) is guided by an auxiliary wheel (14) and then wound on a reeling roller (7). The delivery roller (7) delivers the sealing cloth (6) while the reeling roller (7) reels the sealing cloth (6) so as to translate and replace the portion of the sealing cloth (6) that overlaps with the open end of the explosion chamber (1).

2. The automatic sealing device for explosive combustible gas safety test according to claim 1, characterized in that: The sealing cloth (6) is any one of a plastic film and kraft paper.

3. The automatic sealing device for explosive combustible gas safety test according to claim 1, characterized in that: The open end surface of the explosion chamber (1) is provided with an annular groove (9), and a dividing edge (10) is arranged inside the annular groove (9), and the dividing edge (10) divides the annular groove (9) into an inner annular groove (901) and an outer annular groove (902) from the inside to the outside; and the end surface of the moving chamber (3) close to the explosion chamber (1) is provided with an inner convex edge and an outer convex edge in response to the inner annular groove (901) and the outer annular groove (902).

4. The automatic sealing device for explosive combustible gas safety test according to claim 1, characterized in that: The open end surface of the explosion chamber (1) is provided with an annular groove (9), a dividing edge (10) is provided in the annular groove (9), and the dividing edge (10) divides the annular groove (9) into an inner annular groove (901) and an outer annular groove (902) from the inside to the outside; an annular blade (11) is also provided in the outer annular groove (902); An end surface of the moving chamber (3) close to the explosion chamber (1) is provided with an inner convex ridge corresponding to the inner annular groove (901), and an extrusion ridge corresponding to the annular blade (11), and the height of the inner convex ridge is higher than the extrusion ridge, so that the inner convex ridge can first engage with the inner annular groove (901) during the process of docking the moving chamber (3) with the explosion chamber (1).

5. The automatic sealing device for explosive combustible gas safety test according to claim 1, characterized in that: The open end surface of the explosion chamber (1) is provided with an annular groove (9), a dividing edge (10) is provided in the annular groove (9), and the dividing edge (10) divides the annular groove (9) into an inner annular groove (901) and an outer annular groove (902) from the inside to the outside; an annular blade (11) is also provided in the outer annular groove (902); An inner convex ridge is provided on the end surface of one end of the moving chamber (3) close to the explosion chamber (1) for the inner annular groove (901), and a plurality of extrusion wheels (15) are provided for the annular blade (11), and the height of the inner convex ridge is higher than the extrusion wheel (15), so that the inner convex ridge can first engage with the inner annular groove (901) during the process of docking the moving chamber (3) with the explosion chamber (1); The extrusion wheel (15) is connected to the end surface of the moving chamber (3) via a spring telescopic structure; The moving chamber (3) rotates with the cooperation of the self-rotating structure and drives the extrusion wheel (15) to roll along the annular blade (11).

6. The automatic sealing device for explosive combustible gas safety test according to any one of claims 4 or 5, characterized in that: The cutting edge of the annular blade (11) does not extend out of the notch of the annular groove (9).

7. The automatic sealing device for explosive combustible gas safety test according to claim 5, characterized in that: The self-rotation structure comprises a plurality of track grooves (12) provided on the outer surface of the moving chamber (3), and a limiting slider (13) provided on the inner wall of the explosion relief chamber (2) corresponding to the track grooves (12); the limiting slider (13) is inserted into the track groove (12), and changes the circumferential angle of the moving chamber (3) to deflect it by sliding relative to the groove wall of the track groove (12); The extended end of the oil cylinder (5) is a T-shaped structure, and the T-shaped structure is slidably matched with a T-shaped groove correspondingly provided on the back of the end surface of the moving chamber (3), thereby ensuring that the oil cylinder (5) will not interfere with the circumferentially rotating moving chamber (3) during the process of pushing the moving chamber (3) to move horizontally.

8. The automatic sealing device for explosive combustible gas safety test according to claim 5, characterized in that: The wheel surface of the extrusion wheel (15) is V-shaped.

9. The automatic sealing device for explosive combustible gas safety test according to claim 7, characterized in that: The deflection angle of the mobile chamber (3) multiplied by the number of extrusion wheels (15) equals 360°.

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