A straight-through fitting for a stainless steel corrugated hose for gas delivery

Abstract

The present application relates to the technical field of straight-through pipe fittings, and discloses a straight-insertion type stainless steel corrugated hose straight-through pipe fitting for gas delivery, which comprises a straight-through base, a straight-through joint and a corrugated hose, the straight-through base and the straight-through joint are screw-connected, one end of the straight-through base is fixed with a push ring, the end of the push ring is provided with an inner taper surface, and one side of the straight-through joint is provided with a sealing gasket; an installation frame is arranged in the straight-through joint, a plurality of clamping blocks are slidably arranged on the inner side of the installation frame, elastic ropes are connected between the clamping blocks, the outer sides of the clamping blocks are each provided with an outer taper surface matched with the inner taper surface, one side of the clamping blocks is provided with a clamping groove, and a rotating plate is rotatably connected in the clamping groove. In the process of inserting the corrugated hose, the clamping blocks are automatically assembled, then the straight-through base and the straight-through joint can be directly screwed, and the sealing connection is realized, so that the operation is simple and the efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of straight-through pipe fittings, specifically a straight-through stainless steel corrugated flexible hose fitting for direct-insertion gas transmission. Background Technology

[0002] Stainless steel corrugated hoses are flexible and have good temperature and pressure resistance, making them suitable for conveying various fluid media such as natural gas. When using stainless steel corrugated hoses, a connecting device is required for installation.

[0003] Patent CN108105501A discloses a straight-through fitting for a stainless steel corrugated flexible gas hose, comprising a corrugated hose and a sheath fitted thereon. The sheath has several evenly distributed gas guide grooves on its inner wall. The fitting also includes a straight-through base, a clamping ring, a pressure sleeve, and a sealing gasket. The inner opening of the head of the straight-through base has an inner conical surface that abuts against the outer conical surface of the clamping ring. The end face of the clamping ring abuts against the end face of the pressure sleeve, and the sealing gasket abuts against the other end face of the pressure sleeve. During installation, simply insert the stainless steel corrugated flexible gas hose directly into the straight-through fitting. You can feel the clamping ring being inserted by sound and touch. At this point, gently pulling the corrugated hose will not pull it out. This process indicates that the outer diameter of the corrugated hose is larger than the inner diameter of the clamping ring. This causes the clamping ring to slide against the outer wall of the corrugated hose during insertion, easily causing scratches and reducing the service life of the corrugated hose. Summary of the Invention

[0004] The purpose of this invention is to provide a straight-through stainless steel corrugated hose fitting for direct-insertion gas transmission, in order to solve the problems mentioned above.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a straight-through stainless steel corrugated hose fitting for direct-insertion gas transmission, comprising a straight-through base, a straight-through connector, and a corrugated hose, wherein the straight-through base and the straight-through connector are screwed together, a push ring is fixed at one end of the straight-through base, the end of the push ring is provided with an inner conical surface, a sealing gasket is provided on one side of the straight-through connector, and one end of the corrugated hose passes through the straight-through base and abuts against the sealing gasket;

[0006] The straight connector is provided with a mounting bracket. Multiple clamping blocks are slidably provided on the inner side of the mounting bracket. Elastic ropes are connected between the multiple clamping blocks. Each of the multiple clamping blocks has an outer conical surface that mates with the inner conical surface. Each of the multiple clamping blocks has a slot on one side. A rotating plate is rotatably connected in each of the multiple slots. Rollers are rotatably connected to the ends of the multiple rotating plates.

[0007] A limiting block is slidably connected inside the mounting bracket. One end of the limiting block slides into the slot and abuts against one side of the rotating plate. A first spring is fixedly connected between the limiting block and the mounting bracket.

[0008] As a preferred embodiment of the stainless steel corrugated hose straight-through fitting for direct-insertion gas transmission according to the present invention, wherein: when the clamping block is confined within the mounting frame, the distance between the innermost side of the clamping block and the axis of the corrugated hose is greater than half of the maximum outer diameter of the corrugated hose, and when the clamping block is confined within the mounting frame, the distance between the roller and the axis of the corrugated hose is less than half of the maximum outer diameter of the corrugated hose.

[0009] As a preferred embodiment of the stainless steel corrugated flexible hose straight-through fitting for direct-insertion gas transmission according to the present invention, wherein: a sheath is fixed on the outside of the corrugated hose, the straight-through base is sleeved on the outside of the sheath, and a sealing ring is provided between the straight-through base and the sheath.

[0010] As a preferred embodiment of the stainless steel corrugated hose straight-through fitting for direct-insertion gas transmission according to the present invention, wherein: the inner side of the clamping block is provided with a groove that matches the corrugated shape of the hose.

[0011] As a preferred embodiment of the stainless steel corrugated flexible hose straight-through fitting for direct-insertion gas transmission according to the present invention, the straight-through base is provided with a leakage hole.

[0012] As a preferred embodiment of the straight-through stainless steel corrugated hose fitting for direct-insertion gas transmission according to the present invention, wherein: the inner and outer sides of the end of the limiting block that extends into the slot are provided with inclined surfaces, and the outer side of the clamping block is provided with a chamfer structure that cooperates with the inner inclined surface of the limiting block.

[0013] As a preferred embodiment of the stainless steel corrugated flexible hose straight-through fitting for direct-insertion gas transmission according to the present invention, the roller is made of rubber material.

[0014] As a preferred embodiment of the straight-through stainless steel corrugated flexible hose fitting for direct-insertion gas transmission according to the present invention, wherein: the outer side of the push ring slides in conjunction with the inner side of the mounting bracket, and a sealing ring is provided between the push ring and the mounting bracket.

[0015] As a preferred embodiment of the stainless steel corrugated flexible hose straight pipe fitting for direct-insertion gas transmission according to the present invention, wherein: a sliding groove is provided on one side of the mounting bracket, an L-shaped through groove is provided inside the mounting bracket, a sliding cylinder is slidably connected in the through groove, a second spring is fixedly connected between the sliding cylinder and the end of the through groove, a connecting rod is rotatably connected to one side of the sliding cylinder, and the other end of the connecting rod is slidably engaged in the sliding groove.

[0016] As a preferred embodiment of the stainless steel corrugated flexible hose straight-through fitting for direct-insertion gas transmission according to the present invention, wherein: the inner side of the straight-through connector is provided with an annular channel for gas flow, a vent hole is passed through one side of the straight-through connector, an elastic membrane is fixedly installed on one end of the straight-through connector at the vent hole, the other end of the vent hole is connected to the annular channel, and the through groove on the mounting bracket is connected to the annular channel.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In this invention, when the corrugated hose is inserted into the straight connector, the clamping block is limited within the mounting frame by the limiting block, so that the corrugated hose will not slide against the clamping block during the insertion process. Until the first crest of the corrugated hose pushes the rotating plate to rotate and cause the limiting block to retract, the clamping block retracts and assembles into the trough of the corrugated hose under the action of the elastic rope. Then, the straight base and the straight connector can be tightened directly, so that the clamping block pushes the corrugated hose to press against the sealing gasket to achieve a sealed connection. The operation is simple and efficient.

[0019] 2. When the clamping block of the present invention is released from the mounting bracket, one side of the connecting rod loses support, causing the second spring to push the slide cylinder to move, which pushes the gas in the through groove into the annular channel and the vent hole, causing the elastic film at the end of the vent hole to expand. Thus, based on the objective fact of the expansion of the elastic film, it can be determined that the clamping block has been assembled on the outside of the corrugated hose. Then, the tightening operation of the straight base and the straight connector can be performed, avoiding repeated operations due to subjective judgment errors, which would reduce efficiency.

[0020] 3. When the expansion of the elastic film determines that the clamping block has been installed on the outside of the corrugated hose, the expansion of the elastic film can be felt in real time by the installer's fingers touching the surface of the elastic film. This avoids the situation where the expansion of the elastic film cannot be observed when the elastic film on the straight connector rotates into the blind spot of the installer's field of vision. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a cross-sectional view of the corrugated hose of the present invention when it is pressed together.

[0023] Figure 3 for Figure 2 A magnified structural diagram at point A.

[0024] Figure 4 This is a cross-sectional view of the corrugated hose of the present invention during insertion.

[0025] Figure 5 for Figure 4 A magnified structural diagram at point B.

[0026] Figure 6 This is a schematic cross-sectional view of the mounting bracket assembly of the present invention.

[0027] Figure 7 for Figure 6 A magnified structural diagram at point C.

[0028] Figure 8 This is a schematic diagram of the three-dimensional structure of the clamping block assembly of the present invention.

[0029] Figure 9 This is a schematic cross-sectional view of the clamping block assembly of the present invention.

[0030] Figure 10 This is a cross-sectional view of the straight connector of the present invention.

[0031] In the diagram: 1. Sheath; 2. Straight-through base; 21. Sealing ring; 22. Leakage hole; 23. Push ring; 24. Inner conical surface; 3. Straight-through connector; 31. Sealing gasket; 32. Vent hole; 33. Elastic diaphragm; 34. Annular channel; 4. Corrugated hose; 5. Mounting bracket; 51. Sealing ring; 52. Slide cylinder; 53. Slide groove; 54. Connecting rod; 55. First spring; 56. Limiting block; 57. Second spring; 6. Clamping block; 61. Roller; 62. Rotating plate; 63. Outer conical surface; 64. Elastic rope; 65. Slot. Detailed Implementation

[0032] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific configurations and algorithms presented below, but covers any modifications, substitutions, and improvements to elements, components, and algorithms without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description in order to avoid unnecessarily obscuring the invention.

[0033] Example 1, referring to Figure 1-10 The first embodiment of the present invention provides a straight-through stainless steel corrugated hose fitting for direct-insertion gas transmission, including a straight-through base 2, a straight-through connector 3 and a corrugated hose 4. The straight-through base 2 and the straight-through connector 3 are screwed together. A push ring 23 is fixed at one end of the straight-through base 2. The end of the push ring 23 is provided with an inner conical surface 24. A sealing gasket 31 is provided on one side of the straight-through connector 3. One end of the corrugated hose 4 passes through the straight-through base 2 and abuts against the sealing gasket 31.

[0034] The straight connector 3 is provided with a mounting bracket 5. Multiple clamping blocks 6 are slidably provided on the inner side of the mounting bracket 5. Elastic ropes 64 are connected between the multiple clamping blocks 6. Each of the multiple clamping blocks 6 has an outer conical surface 63 that mates with the inner conical surface 24. Each of the multiple clamping blocks 6 has a slot 65 on one side. Each of the multiple slots 65 is rotatably connected to a rotating plate 62. Rollers 61 are rotatably connected to the ends of the multiple rotating plates 62.

[0035] A limiting block 56 is slidably connected inside the mounting bracket 5. One end of the limiting block 56 slides into the slot 65 and abuts against one side of the rotating plate 62. A first spring 55 is fixedly connected between the limiting block 56 and the mounting bracket 5.

[0036] When the clamping block 6 is confined within the mounting bracket 5, the distance between the innermost side of the clamping block 6 and the axis of the corrugated hose 4 is greater than half of the maximum outer diameter of the corrugated hose 4. When the clamping block 6 is confined within the mounting bracket 5, the distance between the roller 61 and the axis of the corrugated hose 4 is less than half of the maximum outer diameter of the corrugated hose 4.

[0037] A sheath 1 is fixed to the outside of the corrugated hose 4, and a straight base 2 is sleeved on the outside of the sheath 1. A sealing ring 21 is provided between the straight base 2 and the sheath 1.

[0038] The clamping block 6 has a groove on its inner side that matches the corrugated shape of the corrugated hose 4.

[0039] Roller 61 is made of rubber.

[0040] The limiting block 56 has beveled surfaces on both the inner and outer sides of the end that extends into the slot 65, and the clamping block 6 has a chamfered structure on the outer side that matches the beveled surface on the inner side of the limiting block 56.

[0041] In this embodiment, the number of clamping blocks 6 is preferably set to four. During use, the four clamping blocks 6 are pushed into the mounting frame 5 respectively, and the positions of the slots 65 on the clamping blocks 6 correspond one-to-one with the positions of the multiple limiting blocks 56. When the clamping blocks 6 slide toward the mounting frame 5, the chamfered structure on the outer side of the clamping blocks 6 first abuts against the inner inclined surface of the limiting blocks 56. As the clamping blocks 6 continue to move, the clamping blocks 6 push the limiting blocks 56 to retract into the mounting frame 5 through the chamfered structure. At the same time, the limiting blocks 56 compress the first spring 55 until the slots 65 on the clamping blocks 6 move to the limit. On one side of the positioning block 56, the elastic force of the first spring 55 causes the end of the limiting block 56 to extend into the slot 65, and the end of the limiting block 56 abuts against the rotating plate 62, so that one side of the rotating plate 62 is in contact with the inner side of the slot 65. At this time, the rotating plate 62 points to the axis of the mounting frame 5, so that the roller 61 is at the position furthest from the outer edge of the clamping block 6. The surface of the limiting block 56 away from the axis of the mounting frame 5 abuts against the end face of the slot 65, so that the limiting block 56 limits the clamping block 6 to be within the mounting frame 5, and at this time the elastic rope 64 connecting the four clamping blocks 6 is in a stretched state.

[0042] Then, the mounting bracket 5 with clamping blocks 6 is slidably fitted into the straight connector 3, and the straight base 2 and the straight connector 3 are screwed together. Next, part of the outer sheath 1 at the end of the corrugated hose 4 is cut off, exposing at least two sets of crests and troughs of the corrugated hose 4. Then, the end of the corrugated hose 4 is passed through the straight base 2 and inserted into the straight connector 3. Because the distance between the innermost side of the clamping block 6 and the axis of the corrugated hose 4 is greater than half the maximum outer diameter of the corrugated hose 4 when the clamping block 6 is confined within the mounting bracket 5, the first crest of the corrugated hose 4 passes between the innermost sides of the four clamping blocks 6. As the corrugated hose 4 continues to be inserted, because the distance between the roller 61 and the axis of the corrugated hose 4 is less than half the maximum outer diameter of the corrugated hose 4 when the clamping block 6 is confined within the mounting bracket 5. The first crest of the corrugated hose 4 pushes the roller 61 to rotate the rotating plate 62. The rotation of the rotating plate 62 pushes the limiting block 56 to move in the direction of contraction towards the mounting frame 5 until the surface of the limiting block 56 away from the axis of the mounting frame 5 separates from the end face of the slot 65. At this time, the elastic force of the elastic rope 64 pulls the four clamping blocks 6 to move in the direction of the axis of the mounting frame 5. The end of the slot 65 on the clamping block 6 passes through the inclined surface on the outside of the limiting block 56, so that the clamping block 6 pushes the limiting block 56 to retract into the mounting frame 5 when sliding, until the elastic force of the elastic rope 64 pulls the four clamping blocks 6 out of the mounting frame 5. Then the elastic force of the elastic rope 64 pulls the four clamping blocks 6 towards the trough of the corrugated hose 4, so that the four clamping blocks 6 retract and fit into the trough on the side of the first crest of the corrugated hose 4.

[0043] Then, the straight base 2 and the straight connector 3 are screwed together and tightened, so that one end of the straight base 2 extends into the straight connector 3, thereby causing the push ring 23 to move toward the four clamping blocks 6. The inner conical surface 24 at the end of the push ring 23 abuts against the outer conical surface 63 on the outside of the four clamping blocks 6. When the push ring 23 moves, the inner conical surface 24 at the end of the push ring 23 pushes the outer conical surface 63 on the outside of the four clamping blocks 6, causing the four clamping blocks 6 to further contract, thereby clamping the corrugated hose 4, thus fixing the corrugated hose 4 to the straight base 2. Then, as the straight base 2 continues to screw together and extend into the straight connector 3, the end of the corrugated hose 4 abuts against the sealing gasket 31 inside the straight connector 3, thereby achieving a sealed connection between the corrugated hose 4 and the straight connector 3, allowing gas to be transported through the corrugated hose 4 and the straight connector 3.

[0044] When the corrugated hose 4 is inserted into the straight connector, the outer sheath 1 moves with the corrugated hose 4 and eventually extends into the straight connector base 2. A seal is achieved through the sealing ring 21 between the straight connector base 2 and the sheath 1, reducing the entry of external gas into the straight connector base 2.

[0045] When the four clamping blocks 6 retract to the outside of the corrugated hose 4, the roller 61 rolls on the outside of the corrugated hose 4, while the rotating plate 62 rotates on one side of the clamping block 6. Since the rotation axis of the rotating plate 62 is close to the limiting block 56, the thrust required for the corrugated hose 4 to push the roller 61 to rotate the rotating plate 62 is very small. There is no situation where the corrugated hose 4 is damaged by force, and the rubber material of the roller 61 can avoid scratching the outer wall of the corrugated hose 4.

[0046] The clamping block 6 has a groove on its inner side that matches the corrugated shape of the corrugated hose 4, so that when the elastic rope 64 drives the clamping block 6 to retract, it can better fit the outer wall of the corrugated hose 4, so that when the end of the corrugated hose 4 is pushed to press against the sealing gasket 31, the corrugated hose 4 is subjected to more uniform force, avoiding the sealing gasket 31 from being squeezed and shifted, which would cause the sealing to fail.

[0047] Example 2, refer to Figure 1-10 This is the second embodiment of the present invention, which differs from the first embodiment in that:

[0048] The mounting bracket 5 has a sliding groove 53 on one side and an L-shaped through groove inside the mounting bracket 5. A sliding cylinder 52 is slidably connected in the through groove. A second spring 57 is fixedly connected between the sliding cylinder 52 and the end of the through groove. A connecting rod 54 is rotatably connected to one side of the sliding cylinder 52, and the other end of the connecting rod 54 is slidably engaged in the sliding groove 53.

[0049] The inner side of the straight connector 3 is provided with an annular channel 34 for gas flow. A vent hole 32 passes through one side of the straight connector 3. An elastic diaphragm 33 is fixedly installed on the straight connector 3 at one end of the vent hole 32. The other end of the vent hole 32 is connected to the annular channel 34. The through groove on the mounting bracket 5 is connected to the annular channel 34.

[0050] During use, while the clamping block 6 is confined within the mounting frame 5, the outer side of the clamping block 6 pushes the connecting rod 54 to move away from the axis of the mounting frame 5, causing one end of the connecting rod 54 to move along the slide groove 53 away from the axis of the mounting frame 5, causing the other end of the connecting rod 54 to push the slide cylinder 52 to slide in the through groove within the mounting frame 5, and causing the slide cylinder 52 to compress the second spring 57, thus increasing the space for air to be contained in the through groove.

[0051] Then, when the mounting bracket 5 slides into the straight connector 3, the through groove on the mounting bracket 5 connects with the annular channel 34 inside the straight connector 3. When the clamping block 6 disengages from the mounting bracket 5, one side of the connecting rod 54 loses the support of the clamping block 6, causing the elastic force of the second spring 57 to push the slide cylinder 52 to move in the through groove. At the same time, the slide cylinder 52 drives one end of the connecting rod 54 to move, causing the other end of the connecting rod 54 to move along the slide groove 53 towards the axis of the mounting bracket 5. When the second spring 57 moves the slide cylinder 52 in the slide groove, the slide cylinder 52 pushes the air in the through groove into the annular channel 34 inside the straight connector 3, thereby making the annular channel 34 connect with the straight connector 3. The air pressure inside the vent 32 increases, causing the elastic membrane 33 located in the vent 32 to expand and bulge under the action of air pressure. At this time, the expansion of the elastic membrane 33 can be felt by sight or touch. If the elastic membrane 33 on the straight connector 3 is in the blind spot of the installer, the installer can feel the expansion of the elastic membrane 33 in real time by touching the surface of the elastic membrane 33 with his / her fingers. Thus, it can be determined in time that the multiple clamping blocks 6 have been assembled on the outside of the corrugated hose 4 based on the objective fact of the expansion of the elastic membrane 33, and then the tightening operation of the straight base 2 and the straight connector 3 can be directly carried out, improving efficiency.

[0052] The remaining structure is the same as that in Example 1.

[0053] Example 3, referring to Figure 1-10 This is the third embodiment of the present invention, which differs from the second embodiment in that:

[0054] The straight base 2 is provided with a leakage hole 22.

[0055] The outer side of the push ring 23 slides with the inner side of the mounting bracket 5, and a sealing ring 51 is provided between the push ring 23 and the mounting bracket 5.

[0056] During use, when the straight base 2 is screwed into the straight connector 3, the push ring 23 and the mounting bracket 5 press against the sealing ring 51, forming a sealing structure between the outer side of the push ring 23 and the mounting bracket 5. This prevents gas leakage from entering the threaded structure of the straight base 2 and the straight connector 3, and prevents chemicals such as sulfur dioxide and hydrogen sulfide in the gas from accelerating the corrosion of the threaded metal parts and reducing the stability of the connection. Thus, when gas leaks from the corrugated hose 4, it can only overflow from the leak hole 22, facilitating the detection of gas leaks.

[0057] The remaining structure is the same as that in Example 2.

[0058] Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Those skilled in the art, based on a study of the drawings, specification, and claims, should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other means or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to identify names rather than to indicate any particular order. No reference numerals in the claims should be construed as limiting the scope of protection. The functionality of multiple parts appearing in the claims can be implemented by a single hardware or software module. The appearance of certain technical features in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A straight-through stainless steel corrugated hose fitting for direct-insertion gas transmission, comprising a straight-through base (2), a straight-through connector (3), and a corrugated hose (4), characterized in that: The straight base (2) and the straight connector (3) are screwed together. One end of the straight base (2) is fixed with a push ring (23). The end of the push ring (23) is provided with an inner conical surface (24). One side of the straight connector (3) is provided with a sealing gasket (31). One end of the corrugated hose (4) passes through the straight base (2) and abuts against the sealing gasket (31). The straight connector (3) is provided with a mounting bracket (5), and multiple clamping blocks (6) are slidably provided on the inner side of the mounting bracket (5). Elastic ropes (64) are connected between the multiple clamping blocks (6). Each of the multiple clamping blocks (6) is provided with an outer conical surface (63) that mates with the inner conical surface (24). Each of the multiple clamping blocks (6) is provided with a slot (65) on one side. Each of the multiple slots (65) is rotatably connected with a rotating plate (62). Rollers (61) are rotatably connected to the ends of the multiple rotating plates (62). A limiting block (56) is slidably connected inside the mounting bracket (5). One end of the limiting block (56) slides into the slot (65) and abuts against one side of the rotating plate (62). A first spring (55) is fixedly connected between the limiting block (56) and the mounting bracket (5). When the clamping block (6) is confined within the mounting bracket (5), the distance between the innermost side of the clamping block (6) and the axis of the corrugated hose (4) is greater than half of the maximum outer diameter of the corrugated hose (4), and when the clamping block (6) is confined within the mounting bracket (5), the distance between the roller (61) and the axis of the corrugated hose (4) is less than half of the maximum outer diameter of the corrugated hose (4). The limiting block (56) has inclined surfaces on both the inner and outer sides of one end that extends into the slot (65), and the clamping block (6) has a chamfered structure on the outer side that cooperates with the inclined surface on the inner side of the limiting block (56).

2. The stainless steel corrugated flexible hose straight-through fitting for direct-insertion gas transmission according to claim 1, characterized in that: The corrugated hose (4) is fixed with a sheath (1) on the outside, and the straight base (2) is sleeved on the outside of the sheath (1). A sealing ring (21) is provided between the straight base (2) and the sheath (1).

3. A straight-through stainless steel corrugated flexible hose fitting for direct-insertion gas transmission according to claim 1, characterized in that: The clamping block (6) has a groove on its inner side that matches the corrugated shape of the corrugated hose (4).

4. A straight-through stainless steel corrugated flexible hose fitting for direct-insertion gas transmission according to claim 1, characterized in that: The straight base (2) is provided with a leakage hole (22).

5. A straight-through stainless steel corrugated flexible hose fitting for direct-insertion gas transmission according to claim 1, characterized in that: The roller (61) is made of rubber.

6. A straight-through stainless steel corrugated flexible hose fitting for direct-insertion gas transmission according to claim 1, characterized in that: The outer side of the push ring (23) slides in conjunction with the inner side of the mounting bracket (5), and a sealing ring (51) is provided between the push ring (23) and the mounting bracket (5).

7. A straight-through stainless steel corrugated flexible hose fitting for direct-insertion gas transmission according to claim 1, characterized in that: The mounting bracket (5) has a sliding groove (53) on one side and an L-shaped through groove inside the mounting bracket (5). A sliding cylinder (52) is slidably connected inside the through groove. A second spring (57) is fixedly connected between the sliding cylinder (52) and the end of the through groove. A connecting rod (54) is rotatably connected to one side of the sliding cylinder (52), and the other end of the connecting rod (54) is slidably engaged in the sliding groove (53).

8. A straight-through stainless steel corrugated flexible hose fitting for direct-insertion gas transmission according to claim 7, characterized in that: The inner side of the straight connector (3) is provided with an annular channel (34) for gas flow. A vent hole (32) is passed through one side of the straight connector (3). An elastic membrane (33) is fixedly installed on one end of the vent hole (32) on the straight connector (3). The other end of the vent hole (32) is connected to the annular channel (34). The through groove on the mounting bracket (5) is connected to the annular channel (34).

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