A mine explosion-proof spiral exhaust and pressure relief device

Abstract

This invention discloses a mine-use explosion-proof spiral venting and pressure relief device, belonging to the technical field of explosion-proof pressure relief devices. The main structure of this mine-use explosion-proof spiral venting and pressure relief device includes an explosion-proof pressure relief shell and a first explosion-proof pressure relief inner core. An axially arranged venting chamber is provided inside the explosion-proof pressure relief shell, with one end of the venting chamber being open and the other end of the explosion-proof pressure relief shell having a pressure relief hole connected to the venting chamber. The first explosion-proof pressure relief inner core is disposed within the venting chamber. At least one explosion-proof spiral pressure relief channel is provided on the outer wall of the first explosion-proof pressure relief inner core. A second explosion-proof pressure relief inner core can also be provided between the explosion-proof pressure relief shell and the first explosion-proof pressure relief inner core. This increases the cross-sectional area of ​​the pressure relief channel without changing the explosion-proof gap. By changing the number of stages of the explosion-proof pressure relief inner core, practical application requirements can be met, achieving both venting and pressure relief while satisfying explosion-proof design requirements.

Description

Technical Field

[0001] This invention relates to the field of explosion-proof pressure relief devices, and in particular to a mine-use explosion-proof spiral exhaust pressure relief device. Background Technology

[0002] In the explosion-proof chamber of the explosion-proof lithium-ion battery power supply used in coal mines, many lithium-ion batteries are placed. Because lithium batteries will produce a large amount of gas under abnormal conditions, if these gases cannot be quickly and effectively discharged from the explosion-proof chamber, it will cause the internal pressure of the explosion-proof chamber to rise or even cause an explosion. Therefore, explosion-proof pressure relief devices are usually required to be installed on the explosion-proof chamber.

[0003] Existing explosion-proof pressure relief devices fall into two categories. One type uses a principle similar to a safety valve, releasing pressure when a preset value is reached. However, the pressure relief flow rate of this type of device is relatively small, making it difficult to meet explosion-proof pressure relief requirements. The other type uses a diaphragm structure, which is crushed when the pressure is high enough, allowing pressure relief through the damaged diaphragm. This type of device requires diaphragm replacement, and the vent is too large after the diaphragm is damaged. In this case, the explosion-proof pressure relief device does not meet the explosion-proof design requirements and is prone to causing an explosion.

[0004] Therefore, there is an urgent need for an exhaust and pressure relief device that can meet both explosion-proof pressure relief requirements and explosion-proof design requirements during the exhaust and pressure relief process. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a mine explosion-proof spiral exhaust and pressure relief device that can meet both the explosion-proof pressure relief requirements and the explosion-proof design requirements during the exhaust and pressure relief process.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention provides a mine-use explosion-proof spiral venting and pressure relief device, comprising an explosion-proof pressure relief shell and a first explosion-proof pressure relief inner core; the explosion-proof pressure relief shell has an axially arranged venting chamber inside, one end of the venting chamber being open, and the other end of the explosion-proof pressure relief shell having a pressure relief hole connected to the venting chamber; the first explosion-proof pressure relief inner core is disposed within the venting chamber; at least one explosion-proof spiral pressure relief channel is provided on the outer wall of the first explosion-proof pressure relief inner core.

[0008] Optionally, at least one second explosion-proof pressure relief inner core is further provided between the explosion-proof pressure relief outer shell and the first explosion-proof pressure relief inner core; the second explosion-proof pressure relief inner core has a rod-shaped structure, and at least one spiral pressure relief channel is provided on the outer wall of the second explosion-proof pressure relief inner core; a receiving cavity is provided inside the second explosion-proof pressure relief inner core, and the receiving cavity is used to hold the first explosion-proof pressure relief inner core or the second explosion-proof pressure relief inner core.

[0009] Optionally, the first explosion-proof pressure relief inner core is provided with a circumferential pressure relief groove at one end facing the bottom of the exhaust chamber.

[0010] Optionally, the gap between the outer diameter of the spiral pressure relief channel on the outer wall of the first explosion-proof pressure relief inner core and the inner diameter of the exhaust chamber is 0.03-0.6mm.

[0011] Optionally, the second explosion-proof pressure relief inner core is provided with a circumferential pressure relief groove at one end facing the bottom of the exhaust cavity, and the receiving cavity is connected to the circumferential pressure relief groove.

[0012] Optionally, the gap between the outer diameter of the spiral pressure relief channel on the outer wall of the first explosion-proof pressure relief inner core and the inner diameter of the receiving cavity is 0.03-0.6 mm.

[0013] Optionally, in two adjacent second explosion-proof pressure relief inner cores, the gap between the outer diameter of the spiral pressure relief channel on the outer wall of the inner second explosion-proof pressure relief inner core and the inner diameter of the receiving cavity of the outer second explosion-proof pressure relief inner core is 0.03-0.6mm.

[0014] Optionally, the pressure relief hole is provided on the end and side wall of the other end of the explosion-proof pressure relief housing.

[0015] Optionally, an external thread is provided on the outer wall of one end of the explosion-proof pressure relief housing, and the external thread is used to connect with the explosion-proof cavity of the battery power supply.

[0016] Optionally, the length of the spiral pressure relief channel is not less than 25 mm.

[0017] The present invention achieves the following technical effects compared to the prior art:

[0018] The mine explosion-proof spiral exhaust and pressure relief device of the present invention mainly includes an explosion-proof pressure relief shell and a first explosion-proof pressure relief inner core. A second explosion-proof pressure relief inner core can also be set between the explosion-proof pressure relief shell and the first explosion-proof pressure relief inner core. While increasing the cross-sectional area of ​​the pressure relief channel, the explosion-proof gap is not changed. By changing the number of stages of the explosion-proof pressure relief inner core, the actual use requirements can be met, and the explosion-proof design requirements are met while achieving exhaust and pressure relief. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a schematic diagram of the structure of the mine explosion-proof spiral exhaust and pressure relief device of the present invention;

[0021] Figure 2 This is a cross-sectional structural schematic diagram of the first explosion-proof pressure relief inner core in the mine explosion-proof spiral exhaust and pressure relief device of the present invention;

[0022] Figure 3 This is a cross-sectional structural schematic diagram of the second explosion-proof pressure relief inner core in the mine explosion-proof spiral exhaust and pressure relief device of the present invention;

[0023] Figure 4 This is a schematic diagram of the end structure of the other end of the explosion-proof pressure relief shell in the mine explosion-proof spiral exhaust and pressure relief device of the present invention;

[0024] Figure 5 A three-dimensional structural diagram of the mine explosion-proof spiral exhaust and pressure relief device of the present invention, which is equipped with a three-stage explosion-proof pressure relief inner core;

[0025] Figure 6 A schematic diagram of the structure of the mine explosion-proof spiral exhaust and pressure relief device of the present invention, which is equipped with a three-stage explosion-proof pressure relief inner core;

[0026] Figure 7 This is a cross-sectional structural diagram of the explosion-proof spiral exhaust and pressure relief device for mining of the present invention, which is equipped with a three-stage explosion-proof pressure relief inner core.

[0027] Explanation of reference numerals in the attached drawings: 1. Explosion-proof pressure relief outer shell; 2. First explosion-proof pressure relief inner core; 3. Second explosion-proof pressure relief inner core; 4. Explosion-proof spiral pressure relief channel; 5. Circumferential pressure relief groove; 6. Pressure relief hole; 7. Rolled edge lock; 31. First-level second explosion-proof pressure relief inner core; 32. Second-level second explosion-proof pressure relief inner core. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1:

[0030] This embodiment provides a mine-use explosion-proof spiral exhaust and pressure relief device, such as... Figure 2 and 4As shown, the device includes an explosion-proof pressure relief shell 1 and a first explosion-proof pressure relief inner core 2. An axially arranged exhaust chamber is located inside the explosion-proof pressure relief shell 1, with one end open and a pressure relief hole 6 connected to the exhaust chamber at the other end. The first explosion-proof pressure relief inner core 2 is disposed within the exhaust chamber. Two explosion-proof spiral pressure relief channels 4 are provided on the outer wall of the first explosion-proof pressure relief inner core 2. A circumferential pressure relief groove 5 is provided at the end of the first explosion-proof pressure relief inner core 2 facing the bottom of the exhaust chamber. An external thread is provided on the outer wall of one end of the explosion-proof pressure relief shell 1 for connection to the explosion-proof cavity of the battery power supply.

[0031] In this specific embodiment, pressure relief holes 6 are provided on both the end face and side wall of the explosion-proof pressure relief housing 1. The outer diameter of the explosion-proof spiral pressure relief channel 4 on the outer wall of the first explosion-proof pressure relief inner core 2 is 0.03 mm away from the inner diameter of the exhaust chamber. In this embodiment, the gap between the outer diameter of the explosion-proof spiral pressure relief channel 4 on the outer wall of the first explosion-proof pressure relief inner core 2 and the inner diameter of the exhaust chamber is mainly used to install the first explosion-proof pressure relief inner core 2 into the explosion-proof pressure relief housing 1. The pitch of the two explosion-proof spiral pressure relief channels 4 on the outer wall of the first explosion-proof pressure relief inner core 2 is 10 mm, and the cross-section of the explosion-proof spiral pressure relief channel 4 is 0.8 mm. 2 The length of the explosion-proof spiral pressure relief channel 4 shall not be less than 25mm.

[0032] High-pressure gas inside the explosion-proof cavity enters from the open end of the exhaust cavity, flows to the bottom of the exhaust cavity through the explosion-proof spiral pressure relief channel 4, and is discharged through the pressure relief hole 6 on the other end and side wall of the explosion-proof pressure relief shell 1.

[0033] Example 2:

[0034] This embodiment is an improved version based on Embodiment 1, such as... Figures 1 to 4 As shown, in this embodiment, a second explosion-proof pressure relief inner core 3 is also provided between the explosion-proof pressure relief outer shell 1 and the first explosion-proof pressure relief inner core 2. The second explosion-proof pressure relief inner core 3 has a rod-shaped structure, and two explosion-proof spiral pressure relief channels 4 are provided on the outer wall of the second explosion-proof pressure relief inner core 3. A receiving cavity is provided inside the second explosion-proof pressure relief inner core 3, and the receiving cavity is used to hold the first explosion-proof pressure relief inner core 2.

[0035] In this specific embodiment, a circumferential pressure relief groove 5 is provided at one end of the second explosion-proof pressure relief inner core 3 facing the bottom of the exhaust cavity, and the receiving cavity is connected to the circumferential pressure relief groove 5. The gap between the outer diameter of the explosion-proof spiral pressure relief channel 4 on the outer wall of the first explosion-proof pressure relief inner core 2 and the inner diameter of the receiving cavity is 0.18 mm.

[0036] High-pressure gas inside the explosion-proof cavity enters from the open end of the exhaust cavity, flows through the explosion-proof spiral pressure relief channel 4 on the outer wall of the first explosion-proof pressure relief inner core 2 and the second explosion-proof pressure relief inner core 3, and the gap between the explosion-proof spiral pressure relief channel 4 and the inner wall, and is discharged through the pressure relief hole 6 on the other end and side wall of the explosion-proof pressure relief outer shell 1.

[0037] Example 3:

[0038] This embodiment is an improved version based on Embodiment 2, such as... Figures 5 to 7 As shown, in this embodiment, two second explosion-proof pressure relief inner cores 3 are provided between the explosion-proof pressure relief outer shell 1 and the first explosion-proof pressure relief inner core 2, namely, the first-level second explosion-proof pressure relief inner core 31 and the second-level second explosion-proof pressure relief inner core 32. The gap between the outer diameter of the explosion-proof spiral pressure relief channel 4 on the outer wall of the first-level second explosion-proof pressure relief inner core 31 and the inner diameter of the receiving cavity of the second-level second explosion-proof pressure relief inner core 32 is 0.6mm.

[0039] More specifically, one end of the explosion-proof pressure relief housing 1 is provided with a rolled edge locking buckle 7. After all the explosion-proof pressure relief inner cores are placed inside the exhaust chamber, the opening of the exhaust chamber is narrowed by the rolled edge locking buckle 7 to prevent the explosion-proof pressure relief inner cores from falling off.

[0040] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A mine-use explosion-proof spiral exhaust and pressure relief device, characterized in that, The device includes an explosion-proof pressure relief outer shell and a first explosion-proof pressure relief inner core. An axially arranged exhaust chamber is provided inside the explosion-proof pressure relief outer shell, one end of which is open. A pressure relief hole is provided at one end of the explosion-proof pressure relief outer shell, and the pressure relief hole communicates with the exhaust chamber. The first explosion-proof pressure relief inner core is disposed within the exhaust chamber. At least one explosion-proof spiral pressure relief channel is provided on the outer wall of the first explosion-proof pressure relief inner core. A second explosion-proof pressure relief inner core is provided between the explosion-proof pressure relief outer shell and the first explosion-proof pressure relief inner core; the second explosion-proof pressure relief inner core has a rod-shaped structure, and two explosion-proof spiral pressure relief channels are provided on the outer wall of the second explosion-proof pressure relief inner core; a receiving cavity is provided inside the second explosion-proof pressure relief inner core, and the receiving cavity is used to hold the first explosion-proof pressure relief inner core; The first explosion-proof pressure relief inner core has a circumferential pressure relief groove at one end near the pressure relief hole; The gap between the outer diameter of the explosion-proof spiral pressure relief channel on the outer wall of the second explosion-proof pressure relief inner core and the inner diameter of the exhaust cavity is 0.03-0.6mm; The second explosion-proof pressure relief inner core is provided with a circumferential pressure relief groove at one end near the pressure relief hole, and the receiving cavity is connected to the circumferential pressure relief groove on the second explosion-proof pressure relief inner core; The gap between the outer diameter of the explosion-proof spiral pressure relief channel on the outer wall of the first explosion-proof pressure relief inner core and the inner diameter of the receiving cavity is 0.03-0.6mm; The pressure relief hole is provided on the end and side wall of the other end of the explosion-proof pressure relief shell; One end of the explosion-proof spiral pressure relief channel on the outer wall of the first explosion-proof pressure relief inner core is connected to the end of the receiving cavity away from the pressure relief hole, and the other end of the explosion-proof spiral pressure relief channel on the outer wall of the first explosion-proof pressure relief inner core is connected to the circumferential pressure relief groove on the first explosion-proof pressure relief inner core; one end of the explosion-proof spiral pressure relief channel on the outer wall of the second explosion-proof pressure relief inner core is connected to the end of the exhaust cavity away from the pressure relief hole, and the other end of the explosion-proof spiral pressure relief channel on the outer wall of the first explosion-proof pressure relief inner core is connected to the circumferential pressure relief groove on the second explosion-proof pressure relief inner core; the circumferential pressure relief groove on the first explosion-proof pressure relief inner core, the circumferential pressure relief groove on the second explosion-proof pressure relief inner core, and the pressure relief hole are connected.

2. The mine explosion-proof spiral exhaust and pressure relief device according to claim 1, characterized in that, An external thread is provided on the outer wall of one end of the explosion-proof pressure relief shell, and the external thread is used to connect with the explosion-proof cavity of the battery power supply.

3. The mine explosion-proof spiral exhaust and pressure relief device according to claim 1, characterized in that, The length of the explosion-proof spiral pressure relief channel shall not be less than 25mm.

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