Gas production assembly and circuit breaker

Abstract

The utility model discloses a gas production assembly and a circuit breaker, the gas production assembly is arranged in the circuit breaker, the gas production assembly comprises two gas production structures which are arranged at an interval, each gas production structure comprises a gas production part and an isolation part which are sequentially connected along a first direction, the gas production part is made of a gas production material, and the bottom of the isolation part along a second direction is provided with a mounting part; the mounting part is used for mounting an arc extinguishing assembly of the circuit breaker, the gas production parts of the two gas production structures are oppositely arranged, an arc passage is arranged between the two gas production parts, and an arc passes through the arc passage. According to the gas production assembly and the circuit breaker, the gas production assembly can reduce melting deformation, a gap between the gas production pieces is ensured, and clamping stagnation of the contact assembly is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of electrical equipment, and in particular, relates to a gas-generating component and a circuit breaker. Background Art

[0002] In the circuit breaker, an arc will be generated between the moving contact and the static contact of the contact assembly of the circuit breaker when the contact is disconnected. When the arc passes through the gas-generating assembly, the gas-generating assembly will produce gas that promotes the arc under the action of the arc, thereby accelerating the movement speed of the arc, and the arc can enter the arc extinguishing assembly for extinguishing.

[0003] The materials used in current gas-producing components often find it difficult to balance temperature resistance and gas-producing performance under high indicators. After the electric arc enters the arc-extinguishing component, it will release heat to the arc-extinguishing component grid. When the hot arc-extinguishing grid contacts the gas-producing component, the material of the gas-producing component will melt. The melted gas-producing component will deform, and the gap between the two gas-producing parts cannot be guaranteed, causing the contact assembly to get stuck. Utility Model Content

[0004] The present application provides a gas-generating assembly and a circuit breaker, wherein the gas-generating assembly can reduce melting deformation, ensure the gap between gas-generating parts, and avoid contact assembly jamming.

[0005] The present application provides a gas-producing component, which is arranged in a circuit breaker, and the gas-producing component includes two gas-producing structures arranged at intervals, the gas-producing structure includes a gas-producing part and an isolating part connected in sequence along a first direction, the gas-producing part is made of a gas-producing material, and the isolating part is provided with a mounting portion at the bottom along a second direction, and the mounting portion is used to install the arc extinguishing component of the circuit breaker, the gas-producing parts of the two gas-producing structures are arranged facing each other, and there is an arc-passing channel between the two gas-producing parts, and the arc-passing channel is used to pass the electric arc.

[0006] In the gas generating assembly as above, along the first direction, the gas generating member has a first thickness D1, the isolation member has a second thickness D2, and the first thickness D1 and the second thickness D2 have the following relationship: D1<D2.

[0007] In the gas producing assembly as above, the isolating member is made of a material that is resistant to high temperatures and has gas producing properties, and the gas producing properties of the gas producing member are better than those of the isolating member.

[0008] As the gas-producing assembly above, the gas-producing part includes a first gas-producing part and a second gas-producing part connected along the second direction, and along the third direction, the length of the first gas-producing part is smaller than the length of the second gas-producing part, and the first gas-producing part is used to cover the contact assembly of the circuit breaker.

[0009] In the above gas producing assembly, the second gas producing part has a recessed portion, which is recessed at the bottom of the second gas producing part along the second direction, and in the third direction, the recessed portion is opposite to the first gas producing part.

[0010] In the gas generating assembly as above, the mounting portion comprises a plurality of mounting grooves spaced apart along a third direction, and the plurality of mounting grooves are used for plugging and mating with a plurality of arc extinguishing grids of the arc extinguishing assembly.

[0011] As the gas-producing assembly as above, the gas-producing structure also includes a blocking member, which is connected to a side of the isolating member facing away from the gas-producing member. Along the second direction, the height of the blocking member is greater than the height of the gas-producing member and the height of the isolating member. There is an installation space between the two blocking members, and the installation space is used to install the gas-producing member, the isolating member and the arc extinguishing assembly.

[0012] As the gas-producing component above, the gas-producing part has a plurality of fixing parts arranged at intervals, the plurality of fixing parts are arranged on the surface of the gas-producing part facing the isolation part, the isolation part has a plurality of first connecting holes arranged along the first direction, the blocking part has a plurality of second connecting holes arranged along the first direction, the plurality of fixing parts, the plurality of first connecting holes and the plurality of second connecting holes are arranged relative to each other, and the fixing parts are connected to the corresponding first connecting holes and the corresponding second connecting holes in sequence through the connecting parts.

[0013] On the other hand, the present application also provides a circuit breaker, which includes the above-mentioned gas-producing component, and also includes an arc extinguishing component and a contact assembly. The arc extinguishing component and the contact assembly are respectively arranged on both sides of the gas-producing component along the second direction. The arc extinguishing assembly is detachably connected to the mounting portion of the gas-producing component, and the contact assembly is at least partially arranged in the arc passage.

[0014] In the circuit breaker as above, the contact assembly includes a moving contact and a stationary contact, the moving contact can move in a direction toward or away from the stationary contact, and in a plane perpendicular to the first direction, the moving contact moves within the projection range of the first gas producing part of the gas producing member.

[0015] The gas-producing component of the present application has two gas-producing structures arranged at intervals, and the gas-producing structure has a gas-producing part and an isolating part. The mounting portion of the isolating part can be used to install the arc-extinguishing component. The heat generated by the arc-extinguishing component after arc extinguishing can be transferred to the isolating part and will not directly act on the gas-producing part. Therefore, the gas-producing part can reduce melting and deformation, and the arc-passing channel formed between the two gas-producing parts will not be deformed, thereby ensuring that the arc-passing channel has sufficient gap and avoiding the contact assembly of the circuit breaker from being stuck in the arc-passing channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 This is a schematic diagram of the overall structure of the gas production assembly of an embodiment of the present application;

[0018] Figure 2 An exploded view of a gas production component according to an embodiment of the present application;

[0019] Figure 3 A schematic diagram of the structure of a gas producing component of a gas producing assembly according to an embodiment of the present application;

[0020] Figure 4 A schematic diagram of the structure of the isolation member of the gas production assembly of an embodiment of the present application;

[0021] Figure 5 A schematic diagram of a contact assembly of a circuit breaker in an embodiment of the present application in a disconnected state;

[0022] Figure 6 This is a schematic diagram of a contact assembly of a circuit breaker in an embodiment of the present application in a closed state.

[0023] Description of Figure Numbers:

[0024] 10. gas production structure; 20. gas production part; 21. first gas production part; 22. second gas production part; 221. recessed part; 23. fixing part; 30. isolating part; 31. mounting part; 311. mounting groove; 32. first connecting hole; 40. blocking part; 41. mounting space; 42. second connecting hole; 50. arc passage; 60. connecting part;

[0025] 100, gas generating assembly; 200, arc extinguishing assembly; 210, arc extinguishing grid; 300, contact assembly; 310, moving contact; 320, stationary contact; 400, arc striking assembly;

[0026] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0027] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0028] like Figures 1 to 4As shown, the embodiment of the present application provides a gas-generating assembly, which is arranged in a circuit breaker, and the gas-generating assembly 100 includes two gas-generating structures 10 arranged at intervals, and the gas-generating structure 10 includes a gas-generating part 20 and an isolating part 30 connected in sequence along a first direction X, and the gas-generating part 20 is made of a gas-generating material, and the isolating part 30 is provided with a mounting portion 31 at the bottom along a second direction Y, and the mounting portion 31 is used to install the arc-extinguishing assembly 200 of the circuit breaker, and the gas-generating parts 20 of the two gas-generating structures 10 are arranged facing each other, and there is an arc-passing channel 50 between the two gas-generating parts 20, and the arc-passing channel 50 is used to pass the arc. It should be noted that the first direction X is perpendicular to the second direction Y.

[0029] In specific implementation, the gas-producing component of the embodiment of the present application has two gas-producing structures 10 arranged at intervals, and the gas-producing structure 10 has a gas-producing part 20 and an isolation part 30. The mounting portion 31 of the isolation part 30 can be used to mount the arc-extinguishing component 200. The heat generated by the arc-extinguishing component 200 after arc extinguishing can be transferred to the isolation part 30, and the heat will not directly act on the gas-producing part 20. Therefore, the gas-producing part 20 can reduce melting and deformation, and the arc passage 50 formed between the two gas-producing parts 20 will not be deformed, thereby ensuring that the arc passage 50 has sufficient gap, thereby avoiding the contact assembly of the circuit breaker from being stuck in the arc passage 50.

[0030] like Figure 1 and Figure 2 As shown, in the gas generating assembly of the embodiment of the present application, along the first direction X, the gas generating member 20 has a first thickness D1, the isolation member 30 has a second thickness D2, and the first thickness D1 and the second thickness D2 have the following relationship: D1<D2.

[0031] During specific implementation, the first thickness D1 of the gas-producing part 20 is smaller than the second thickness D2 of the isolating part 30, so that the thickness of the gas-producing part 20 is smaller, thereby preventing a large volume of gas-producing material from melting due to heat, thereby preventing the arc passage 50 formed by the two gas-producing parts 20 from deformation, and also making the thickness of the isolating part 30 larger, so that the arc extinguishing assembly 200 can be completely installed on the isolating part 30 without contacting the gas-producing part 20, and because the isolating part 30 has sufficient thickness, the arc extinguishing assembly 200 can also have sufficient thickness in the first direction X, thereby ensuring the arc extinguishing effect of the arc extinguishing assembly 200.

[0032] In the gas producing assembly of the embodiment of the present application, the isolation member 30 is made of a material that is resistant to high temperatures and has gas producing performance, and the gas producing performance of the gas producing member 20 is better than that of the isolation member 30 .

[0033] In specific implementation, the isolation member 30 is made of a material that is resistant to high temperatures and has gas-producing properties, so that the isolation member 30 can have certain gas-producing properties while ensuring that it will not be deformed when encountering high temperatures, so as to improve the overall gas-producing effect of the gas-producing component 100; the gas-producing performance of the gas-producing component 20 is better than that of the isolation member 30. Since the gas-producing component 20 is closer to the contact assembly, the gas-producing performance of the gas-producing component 20 can be fully utilized, thereby generating a large amount of gas to promote the movement of the arc. The isolation member 30 does not directly contact the arc during the gas production process of the gas-producing component 100, and has the effect of assisting the generation of the arc. The setting of its lower gas-producing performance can ensure that it has strong high-temperature resistance.

[0034] like Figure 3 As shown, the gas producing component of the embodiment of the present application, wherein the gas producing part 20 includes a first gas producing part 21 and a second gas producing part 22 connected along the second direction Y, and along the third direction Z, the length of the first gas producing part 21 is less than the length of the second gas producing part 22, and the first gas producing part 21 is used to cover the contact assembly 300 of the circuit breaker. It should be noted that the third direction Z is perpendicular to both the first direction X and the second direction Y.

[0035] During specific implementation, the first gas producing part 21 and the second gas producing part 22 of the gas producing part 20 are connected along the second direction Y, wherein the first gas producing part 21 can be set at a position close to the contact assembly 300 and cover the contact assembly 300, so that the arc generated by the contact assembly 300 can all contact with the first gas producing part 21, and the gas generated by the first gas producing part 21 pushes the arc to move to the second gas producing part 22 with a longer length, thereby preventing the arc from escaping from the coverage of the gas producing part 20 and causing damage to other parts in the circuit breaker during the process of pushing the arc to move; the second gas producing part 22 is longer in length, so that it can match the length of the arc extinguishing assembly 200, and then disperse the arc into the arc extinguishing assembly 200, thereby preventing the arc from being excessively concentrated in the arc extinguishing assembly 200.

[0036] Specifically, along the direction from the first gas producing section 21 to the second gas producing section 22, the lengths of the first gas producing section 21 and the second gas producing section 22 along the third direction Z are gradually increased. The purpose is to prevent the arc from escaping from the coverage of the gas producing part 20 and causing damage to other parts in the circuit breaker during the downward movement of the arc; and the gradually changing shapes of the first gas producing section 21 and the second gas producing section 22 are adapted to the shape of the arc striking assembly 400, so as to facilitate the installation between the gas producing part 20 and the arc striking assembly 400.

[0037] like Figure 3 As shown, the gas producing component of the embodiment of the present application, wherein the second gas producing part 22 has a recessed part 221, which is recessed at the bottom of the second gas producing part 22 along the second direction Y. In the third direction Z, the recessed part 221 is opposite to the first gas producing part 21.

[0038] During specific implementation, the moving contact 310 of the contact assembly 300 moves within the coverage range of the first gas producing portion 21 and generates an arc. Therefore, the arc is concentrated on the position of the first gas producing portion 21 in the initial stage. Therefore, the first gas producing portion 21 will be deformed and squeeze the second gas producing portion 22. The recessed portion 221 is opposite to the first gas producing portion 21 and is recessed at the bottom of the second gas producing portion 22. After deformation, the first gas producing portion 21 squeezes the second gas producing portion 22 downward. The setting of the recessed portion 221 can provide the second gas producing portion 22 with a deformation margin in the second direction Y, thereby avoiding excessive deformation of the first gas producing portion 21 and the second gas producing portion 22, which affects the overall shape of the gas producing part 20.

[0039] like Figure 4 As shown, the gas-generating assembly of the embodiment of the present application, wherein the mounting portion 31 includes a plurality of mounting grooves 311 spaced apart along a third direction Z, and the plurality of mounting grooves 311 are used for plugging and mating with a plurality of arc-extinguishing grids 210 of the arc-extinguishing assembly 200 .

[0040] In a specific implementation, the multiple installation grooves 311 of the installation portion 31 can be plugged into the multiple arc extinguishing grids 210 of the arc extinguishing assembly 200, so that the arc extinguishing assembly 200 can be stably installed on the installation portion 31, avoiding the arc extinguishing assembly 200 from falling off after installation.

[0041] like Figure 1 As shown, the gas-producing component of the embodiment of the present application, wherein the gas-producing structure 10 also includes a blocking member 40, which is connected to a side of the isolation member 30 facing away from the gas-producing member 20, and along the second direction Y, the height of the blocking member 40 is greater than the height of the gas-producing member 20 and the height of the isolation member 30, and an installation space 41 is provided between the two blocking members 40, and the installation space 41 is used to install the gas-producing member 20, the isolation member 30 and the arc extinguishing assembly 200.

[0042] In specific implementation, the installation space 41 between the two blocking members 40 can be used to install the gas-producing member 20, the isolating member 30 and the arc extinguishing assembly 200. After the installation is completed, the blocking member 40, the isolating member 30 and the gas-producing member 20 are stacked. Since the height of the blocking member 40 is greater than the height of the gas-producing member 20 and the height of the isolating member 30 along the second direction Y, the arc extinguishing assembly 200 can be arranged below the isolating member 30 and the gas-producing member 20 and installed with the installation portion 31. The setting of the blocking member 40 blocks the arc in the arc extinguishing assembly 200 to prevent the arc from escaping from the arc extinguishing assembly 200 along the first direction X.

[0043] like Figure 2 and Figure 3As shown, a gas-producing component of an embodiment of the present application, wherein the gas-producing part 20 has a plurality of fixing parts 23 arranged at intervals, the plurality of fixing parts 23 are arranged on the surface of the gas-producing part 20 facing the isolation part 30, the isolation part 30 has a plurality of first connecting holes 32 arranged through along the first direction X, the blocking part 40 has a plurality of second connecting holes 42 arranged through along the first direction X, the plurality of fixing parts 23, the plurality of first connecting holes 32 and the plurality of second connecting holes 42 are arranged in relative positions, and the fixing parts 23 are connected to the corresponding first connecting holes 32 and the corresponding second connecting holes 42 in sequence through the connecting member 60.

[0044] In specific implementation, the connecting member 60 can be simultaneously inserted into the first connecting hole 32, the second connecting hole 42 and the fixing portion 23 at the same position to connect the isolating member 30, the blocking member 40 and the gas-producing member 20. The insertion of multiple connecting members 60 can fix the isolating member 30, the blocking member 40 and the gas-producing member 20 at all parts, thereby ensuring the connection stability of the three and enabling the gas-producing member 20 as a whole to be stably installed inside the circuit breaker.

[0045] Optionally, the connecting member 60 is a connecting structure such as a connecting bolt or a connecting pin. When a part of the gas producing member 20 is damaged, the connecting member 60 can be disassembled in time to replace parts of the gas producing member 20.

[0046] like Figure 5 and Figure 6 As shown, an embodiment of the present application also provides a circuit breaker, which includes the above-mentioned gas-producing assembly, and also includes an arc extinguishing assembly 200 and a contact assembly 300. The arc extinguishing assembly 200 and the contact assembly 300 are respectively arranged on both sides of the gas-producing assembly 100 along the second direction Y, and the arc extinguishing assembly 200 is detachably connected to the mounting portion 31 of the gas-producing assembly 100, and the contact assembly 300 is at least partially arranged in the arc passage 50.

[0047] During specific implementation, the contact assembly 300, the gas-generating assembly 100 and the arc-extinguishing assembly 200 are sequentially arranged along the second direction Y. The arc generated by the contact assembly 300 passes through the arc passage 50 of the gas-generating assembly 100 and comes into contact with the gas-generating assembly 100. The gas generated by the gas-generating assembly 100 pushes the arc to continue moving downward until it enters the arc-extinguishing assembly 200 for arc extinguishing.

[0048] Specifically, the circuit breaker also includes an arc-striking assembly 400, which includes two arc-striking plates, which are respectively arranged at two times of the gas-producing assembly 100 along the third direction Z, and extend in the direction from the contact assembly 300 to the arc extinguishing assembly 200 until the two arc-striking plates are connected to both ends of the arc extinguishing assembly 200, so that all the arcs at the contact assembly 300 and the gas-producing assembly 100 can be introduced into the interior of the arc extinguishing assembly 200 for arc extinguishing.

[0049] like Figure 5 and Figure 6 As shown, a circuit breaker of an embodiment of the present application, wherein the contact assembly 300 includes a moving contact 310 and a stationary contact 320, the moving contact 310 can move in a direction toward or away from the stationary contact 320, and in a plane perpendicular to the first direction X, the moving contact 310 moves within the projection range of the first gas producing part 21 of the gas producing part 20.

[0050] Figure 5 and Figure 6 They are schematic diagrams of the contact assembly 300 in the disconnected and closed states, respectively. Figure 5 The movable contact 310 and the stationary contact 320 are separated from each other. Figure 6 The movable contact 310 and the stationary contact 320 are arranged in contact with each other.

[0051] During specific implementation, at the moment when the moving contact 310 is separated from the static contact 320, an arc is generated between the two. As the moving contact 310 moves away from the static contact 320, the arc gradually lengthens. The first gas producing part 21 and the contact assembly 300 are arranged relative to each other, and the moving contact 310 is moved within the projection range of the first gas producing part 21 of the gas producing part 20. This can ensure that all the arcs generated by the moving contact 310 are within the range of the first gas producing part 21, thereby preventing the arc from escaping to other parts during movement and causing damage to other parts.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0053] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A gas production component, characterized in that: The gas-generating component (100) is arranged in a circuit breaker, and comprises two gas-generating structures (10) arranged at intervals. The gas-generating structure (10) comprises a gas-generating part (20) and an isolating part (30) connected in sequence along a first direction (X). The gas-generating part (20) is made of a gas-generating material. The isolating part (30) is provided with a mounting portion (31) at the bottom along a second direction (Y). The mounting portion (31) is used to mount the arc-extinguishing component (200) of the circuit breaker. The gas-generating parts (20) of the two gas-generating structures (10) are arranged facing each other, and an arc-passing channel (50) is provided between the two gas-generating parts (20). The arc-passing channel (50) is used to pass an electric arc.

2. The gas generating assembly according to claim 1, characterized in that: Along the first direction (X), the gas generating member (20) has a first thickness D1, and the isolation member (30) has a second thickness D2, and the first thickness D1 and the second thickness D2 have the following relationship: D1<D2.

3. The gas generating assembly according to claim 1, characterized in that: The isolation member (30) is made of a material that is resistant to high temperatures and has gas-generating properties, and the gas-generating properties of the gas-generating member (20) are better than those of the isolation member (30).

4. The gas generating assembly according to claim 1, characterized in that: The gas producing part (20) comprises a first gas producing part (21) and a second gas producing part (22) connected along the second direction (Y); along the third direction (Z), the length of the first gas producing part (21) is smaller than the length of the second gas producing part (22); the first gas producing part (21) is used to cover the contact assembly (300) of the circuit breaker.

5. The gas generating assembly according to claim 4, characterized in that: The second gas producing portion (22) has a recessed portion (221), which is recessed at the bottom of the second gas producing portion (22) along the second direction (Y). In the third direction (Z), the recessed portion (221) is opposite to the first gas producing portion (21).

6. The gas generating assembly according to claim 1, characterized in that: The mounting portion (31) comprises a plurality of mounting grooves (311) arranged at intervals along a third direction (Z), and the plurality of mounting grooves (311) are used for plugging and matching with a plurality of arc extinguishing grids (210) of the arc extinguishing assembly (200).

7. The gas generating assembly according to claim 1, characterized in that: The gas-generating structure (10) further comprises a blocking member (40), wherein the blocking member (40) is connected to a side of the isolating member (30) facing away from the gas-generating member (20), and along the second direction (Y), the height of the blocking member (40) is greater than the height of the gas-generating member (20) and the height of the isolating member (30), and an installation space (41) is provided between the two blocking members (40), and the installation space (41) is used for installing the gas-generating member (20), the isolating member (30) and the arc-extinguishing assembly (200).

8. The gas generating assembly according to claim 7, characterized in that: The gas-producing part (20) has a plurality of fixed parts (23) arranged at intervals, and the plurality of fixed parts (23) are arranged on the surface of the gas-producing part (20) facing the isolation part (30). The isolation part (30) has a plurality of first connecting holes (32) extending along the first direction (X). The blocking part (40) has a plurality of second connecting holes (42) extending along the first direction (X). The plurality of fixed parts (23), the plurality of first connecting holes (32) and the plurality of second connecting holes (42) are arranged in relative positions, and the fixed parts (23) are connected to the corresponding first connecting holes (32) and the corresponding second connecting holes (42) in sequence through the connecting part (60).

9. A circuit breaker, characterized in that: It comprises a gas-producing assembly as described in any one of claims 1 to 8, and also comprises an arc extinguishing assembly (200) and a contact assembly (300), wherein the arc extinguishing assembly (200) and the contact assembly (300) are respectively arranged on both sides of the gas-producing assembly (100) along the second direction (Y), the arc extinguishing assembly (200) is detachably connected to the mounting portion (31) of the gas-producing assembly (100), and the contact assembly (300) is at least partially arranged in the arc passage (50).

10. The circuit breaker according to claim 9, characterized in that The contact assembly (300) comprises a moving contact (310) and a stationary contact (320); the moving contact (310) can move in a direction toward or away from the stationary contact (320); and in a plane perpendicular to the first direction (X), the moving contact (310) moves within the projection range of the first gas producing portion (21) of the gas producing part (20).

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