Airtight interface structure of self-rescuer

Abstract

An airtight connector structure of a self-rescuer comprises a valve port assembly and a switching assembly. The valve port assembly comprises an airtight connector fixing cover, a self-rescuer shell, a spring, a steel ball and an airtight connector. The switching assembly comprises a verification joint fixing sleeve, a verification joint and a verification joint tailstock. When the self-rescuer is not used, the valve port assembly and the switching assembly are independent, and when the self-rescuer needs to be used, the valve port assembly and the switching assembly are connected, so that the interior of the self-rescuer can be communicated with the switching assembly. And then a checking instrument can be connected with the tail part of the checking connector to carry out airtight checking on the interior of the self-rescuer. After verification is completed, the steel ball in the valve port assembly can return by unscrewing the verification connector fixing sleeve, and the closed state is recovered. The self-rescuer negative pressure detection device is directly connected with the self-rescuer shell and is started by an external device for negative pressure detection, detection equipment is smaller and more convenient, and the detection efficiency is higher.

Description

Technical Field

[0001] The utility model relates to an airtight interface structure of a self-rescuer and belongs to the technical field of self-rescuers. Background Art

[0002] The self-rescuer is an essential safety device for workers entering the mine. The types of self-rescuers equipped in coal mines in my country include filter-type self-rescuers, isolated chemical oxygen self-rescuers, and isolated compressed oxygen self-rescuers. In comparison, the isolated compressed oxygen self-rescuer is a reusable self-rescue escape device that uses high-pressure compressed oxygen as an oxygen source. It has the characteristics of light weight, small size, comfortable breathing, and easy to carry. According to the use specifications, daily management and maintenance are very important.

[0003] At present, the existing isolated compressed oxygen self-rescuers on the market generally have a very cumbersome air tightness detection process. When checking the air tightness, it is necessary to open the upper shell, then straighten the air bag, and remove the mouth plug to connect the air tightness detection device before testing. After passing the test, the mouth plug, air bag, and upper shell must be restored in sequence, which takes a lot of labor time, and the air tightness verification efficiency is not high, which is very difficult for coal mine use and management. Utility Model Content

[0004] To this end, the utility model provides an airtight interface structure of a self-rescuer, which solves the problems of taking a long time to work and low efficiency of airtightness verification in existing isolated compressed oxygen self-rescuers.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-rescuer airtight interface structure, including a valve port assembly and a transfer assembly; the valve port assembly includes an airtight joint fixing cover, a self-rescuer housing, a spring, a steel ball, and an airtight joint; the transfer assembly includes a calibration joint fixing sleeve, a calibration joint, and a calibration joint tail seat;

[0006] One side of the airtight joint fixing cover is connected to the housing of the self-rescuer, the airtight joint is provided inside the airtight joint fixing cover, the spring and the steel ball are sandwiched in the middle of the airtight joint, one side of the spring presses against the airtight joint fixing cover, the other side of the spring contacts the steel ball, and the other side of the steel ball presses against the opening of the airtight joint;

[0007] The verification joint fixing sleeve covers the verification joint, the head of the verification joint tail seat is against the bottom end of the verification joint fixing sleeve, and the tail of the verification joint tail seat is between the verification joint fixing sleeve and the verification joint.

[0008] As a preferred solution for the airtight interface structure of the self-rescuer, a vent inlet is formed in the middle of the airtight joint fixing cover; and the spring is located on the inner side of the vent inlet.

[0009] As a preferred solution for the airtight interface structure of the self-rescuer, the inner wall of the airtight joint and the outer wall at the verification joint port are provided with mutually meshing threads.

[0010] As a preferred solution for the airtight interface structure of the self-rescuer, the verification channel is formed at the center of the verification joint, and the transverse air-permeable holes are provided at the port of the verification joint, and the transverse air-permeable holes are connected to the verification channel.

[0011] As a preferred solution for the airtight interface structure of the self-rescuer, the spring presses the steel ball tightly to seal the airtight joint.

[0012] As a preferred solution for the airtight interface structure of the self-rescuer, the outer diameter of the steel ball is slightly smaller than the inner diameter of the airtight joint.

[0013] As a preferred solution for the airtight interface structure of the self-rescuer, after the verification joint is screwed into the airtight joint, the steel ball is triggered to compress the spring to release the blockage of the airtight joint by the steel ball.

[0014] The utility model has the following advantages: when not in use, the airtight joint and the steel ball are sealed under the action of the spring to prevent external gas from entering the interior of the self-rescuer. During use, the valve port assembly is connected to the adapter assembly, and the verification joint fixing sleeve is held to connect and fix the thread at the port with the thread at the airtight joint. During the threaded connection process, the end of the verification joint lifts up the steel ball under the limiting action of the verification joint tail seat. At this time, the steel ball in the airtight joint is lifted up, so that the interior of the self-rescuer and the airtight joint and the verification joint are connected. Subsequently, the verification instrument can be connected to the tail of the verification joint to perform airtight verification on the interior of the self-rescuer. After the verification is completed, unscrewing the verification joint fixing sleeve can return the steel ball in the airtight joint to restore the airtight state. The utility model can effectively improve the problems of the existing isolated compressed oxygen self-rescuer that takes a lot of labor time and the airtight verification efficiency is low. The detection equipment is smaller, more convenient, and the detection efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0016] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0017] Figure 1 It is an overall schematic diagram of the airtight interface structure of the self-rescuer provided in the embodiment of the utility model;

[0018] Figure 2 A schematic diagram of a valve port assembly of a self-rescuer airtight interface structure provided in an embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of the airtight interface structure adapter assembly of the self-rescuer provided in the embodiment of the utility model;

[0020] In the figure, A, valve port assembly; B, connection interface; 1, airtight joint fixing cover; 2, self-rescuer housing; 3, verification joint fixing sleeve; 4, verification joint; 5, verification joint tail seat; 6, spring; 7, steel ball; 8, airtight joint; 9, ventilation inlet; 10, verification channel; 11, horizontal ventilation hole. DETAILED DESCRIPTION

[0021] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1 , Figure 2 and Figure 3 The utility model embodiment provides a self-rescuer airtight interface structure, including a valve port assembly A and a transfer assembly B; the valve port assembly A includes an airtight joint fixing cover 1, a self-rescuer housing 2, a spring 6, a steel ball 7, and an airtight joint 8; the transfer assembly B includes a check joint fixing sleeve 3, a check joint 4, and a check joint tail seat 5;

[0023] One side of the airtight joint fixing cover 1 is connected to the self-rescuer housing 2, the airtight joint fixing cover 1 is provided with the airtight joint 8, the airtight joint 8 sandwiches the spring 6 and the steel ball 7, one side of the spring 6 presses against the airtight joint fixing cover 1, the other side of the spring 6 contacts the steel ball 7, and the other side of the steel ball 7 presses against the opening of the airtight joint 8;

[0024] The verification joint fixing sleeve 3 covers the verification joint 4 , the head of the verification joint tail seat 5 is against the bottom end of the verification joint fixing sleeve 3 , and the tail of the verification joint tail seat 5 is between the verification joint fixing sleeve 3 and the verification joint 4 .

[0025] In a possible embodiment, a vent inlet 9 is formed in the middle of the airtight joint fixing cover 1 ; the spring 6 is located on the inner side of the vent inlet 9 .

[0026] Specifically, the ventilation inlet 9 can ensure that gas can pass through to achieve conduction.

[0027] In a possible embodiment, the inner wall of the airtight joint 8 and the outer wall at the port of the verification joint 4 are provided with mutually meshing threads.

[0028] Specifically, the airtight joint 8 and the verification joint 4 can be tightly combined together through threads to achieve connection and fixation.

[0029] In a possible embodiment, a verification channel 10 is formed at the center of the verification connector 4 , and the transverse air-permeable hole 11 is provided at the port of the verification connector 4 , and the transverse air-permeable hole 11 is connected to the verification channel 10 .

[0030] Specifically, the verification channel 10 is formed at the center of the verification joint 4 to ensure the passage of gas; the transverse air-permeable hole 11 is provided at the port of the verification joint 4, which can be connected with the air-tight joint 8, the ventilation inlet 9 and the verification channel 10 after the air-tight joint 8 and the verification joint 4 are connected and fixed.

[0031] In a possible embodiment, the spring 6 presses the steel ball 7 to seal the airtight joint 8 .

[0032] Specifically, before the valve port assembly A and the adapter assembly B are connected, the spring 6 will push the steel ball 7 against the airtight joint 8 to block the passage of airflow and ensure good airtightness.

[0033] In a possible embodiment, the outer diameter of the steel ball 7 is slightly smaller than the inner diameter of the airtight joint 8 .

[0034] Specifically, the outer diameter of the steel ball 7 is slightly smaller than the inner diameter of the airtight joint 8 to ensure that the steel ball 7 can move in the airtight joint 8 and that the airtight joint 8 is sealed when the spring 6 presses against the steel ball 7 .

[0035] In a possible embodiment, after the verification joint 4 is screwed into the airtight joint 8 , the steel ball 7 is triggered to compress the spring 6 , so as to release the blockage of the steel ball 7 on the airtight joint 8 .

[0036] Specifically, during the threaded connection process, the end of the verification joint 4 pushes up the steel ball 7 under the limiting action of the verification joint tail seat 5. At this time, the steel ball 7 in the air-tight joint 8 is pushed up, and the blocking of the air-tight joint 8 by the steel ball 7 can be released, so that the interior of the self-rescuer is connected with the air-tight joint 8 and the verification joint 4.

[0037] In summary, the utility model includes a valve assembly A and an adapter assembly B; the valve assembly A includes an airtight joint fixing cover 1, a self-rescuer housing 2, a spring 6, a steel ball 7, and an airtight joint 8; the adapter assembly B includes a verification joint fixing sleeve 3, a verification joint 4, and a verification joint tail seat 5; one side of the airtight joint fixing cover 1 is connected to the self-rescuer housing 2, and the airtight joint fixing cover 1 is provided with the airtight joint 8, the airtight joint 8 sandwiches the spring 6 and the steel ball 7, one side of the spring 6 presses against the airtight joint fixing cover 1, the other side of the spring 6 contacts the steel ball 7, and the other side of the steel ball 7 presses against the opening of the airtight joint 8; the verification joint fixing sleeve 3 covers the verification joint 4, the head of the verification joint tail seat 5 presses against the bottom end of the verification joint fixing sleeve 3, and the tail of the verification joint tail seat 5 is between the verification joint fixing sleeve 3 and the verification joint 4. A vent 9 is formed in the middle of the airtight joint fixing cover 1 to ensure that gas can pass through to achieve conduction. The inner wall of the airtight joint 8 and the outer wall at the port of the verification joint 4 are provided with mutually meshing threads, which can be tightly combined together through the threads to achieve connection and fixation. The verification channel 10 is formed in the center of the verification joint 4 to ensure the passage of gas; the transverse air-permeable hole 11 is provided at the port of the verification joint 4, which can be connected with the airtight joint 8, the vent inlet 9, and the verification channel 10 after the airtight joint 8 and the verification joint 4 are connected and fixed. Before the valve port assembly A and the adapter assembly B are connected, the spring 6 will push the steel ball 7 against the airtight joint 8 to block the passage of airflow and ensure good airtightness. The outer diameter of the steel ball 7 is slightly smaller than the inner diameter of the airtight joint 8 to ensure that the steel ball 7 can move in the airtight joint 8 and ensure that the airtight joint 8 is airtight when the spring 6 presses the steel ball 7. After the verification joint 4 is screwed into the airtight joint 8, it triggers the steel ball 7 to compress the spring 6 to release the blockage of the steel ball 7 on the airtight joint 8. During the threaded connection process, the end of the verification joint 4 lifts up the steel ball 7 under the limiting action of the verification joint tailstock 5. At this time, the steel ball 7 in the airtight joint 8 is lifted up, which can release the blockage of the steel ball 7 on the airtight joint 8, so that the inside of the self-rescuer is connected with the airtight joint 8 and the verification joint 4. The utility model can effectively improve the problems of the existing isolated compressed oxygen self-rescuer that takes more labor time and the airtight verification efficiency is low. The detection equipment is smaller and more convenient, and the detection efficiency is higher.

[0038] The above is a relatively specific and detailed description of the utility model through general description and specific embodiments. It should be understood that based on the technical concept of the utility model, some conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not deviate from the technical concept of the utility model, the technical solutions obtained by these conventional adjustments or further innovations also fall within the scope of protection of the claims of the utility model.

Claims

1. A self-rescuer airtight interface structure, characterized in that: It comprises a valve assembly (A) and a transfer assembly (B); the valve assembly (A) comprises an airtight joint fixing cover (1), a self-rescuer housing (2), a spring (6), a steel ball (7), and an airtight joint (8); the transfer assembly (B) comprises a calibration joint fixing sleeve (3), a calibration joint (4), and a calibration joint tail seat (5); One side of the airtight joint fixing cover (1) is connected to the self-rescuer housing (2), the airtight joint fixing cover (1) is provided with the airtight joint (8) inside, the airtight joint (8) sandwiches the spring (6) and the steel ball (7), one side of the spring (6) presses against the airtight joint fixing cover (1), the other side of the spring (6) contacts with the steel ball (7), and the other side of the steel ball (7) presses against the opening of the airtight joint (8); The calibration joint fixing sleeve (3) covers the calibration joint (4), the head of the calibration joint tail seat (5) abuts against the bottom end of the calibration joint fixing sleeve (3), and the tail of the calibration joint tail seat (5) is located between the calibration joint fixing sleeve (3) and the calibration joint (4).

2. A self-rescuer airtight interface structure according to claim 1, characterized in that: A vent inlet (9) is formed in the middle of the airtight joint fixing cover (1); the spring (6) is located on the inner side of the vent inlet (9).

3. A self-rescuer airtight interface structure according to claim 1, characterized in that: The inner wall of the airtight joint (8) and the outer wall of the port of the verification joint (4) are provided with mutually meshing threads.

4. A self-rescuer airtight interface structure according to claim 1, characterized in that: A verification channel (10) is formed at the center of the verification connector (4), and a transverse air-permeable hole (11) is provided at the end of the verification connector (4), and the transverse air-permeable hole (11) is connected to the verification channel (10).

5. The airtight interface structure of a self-rescuer according to claim 1, characterized in that: The spring (6) presses against the steel ball (7) to seal the airtight joint (8).

6. A self-rescuer airtight interface structure according to claim 1, characterized in that: The outer diameter of the steel ball (7) is smaller than the inner diameter of the airtight joint (8).

7. The airtight interface structure of a self-rescuer according to claim 1, characterized in that: After the verification joint (4) is screwed into the airtight joint (8), the steel ball (7) is triggered to compress the spring (6), thereby releasing the blockage of the steel ball (7) on the airtight joint (8).

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