Variable wave pitch gas appliance connecting pipe

Abstract

The utility model relates to the technical field of gas pipelines, in particular to a variable-wave-pitch gas appliance connecting pipe. A variable-wave-pitch gas appliance connecting pipe comprises a corrugated pipe body, a coating layer and connector assemblies connected to the two ends of the corrugated pipe body. The corrugated pipe body is composed of a wide-wave-pitch section and two dense-wave-pitch sections, and the two dense-wave-pitch sections are connected to the two ends of the wide-wave-pitch section in the length direction respectively. The two ends of the variable-wave-pitch gas appliance connecting pipe are convenient to bend, the variable-wave-pitch gas appliance connecting pipe is convenient to install in a narrow space and a place where a pipeline needs to be bent, a connector is not prone to loosening after installation, the sealing effect is good, a right-angle elbow bent by 90 degrees does not need to be welded, cost is effectively reduced, a user can conveniently judge the position where the corrugated pipe is easy to bend, operation convenience is high, and practicability is high. The technical problems that when an existing corrugated pipe is installed in a narrow space, the end of the pipe needs to be bent in a hard mode, a connector is prone to loosening, the sealing effect is affected, and the cost is high when a 90-degree right-angle elbow is used are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas pipeline technical field especially relates to a variable wave distance gas appliance connecting pipe. BACKGROUND

[0002] The connecting pipe of the gas stove on the market at present mainly uses the corrugated pipe, the corrugated pipe is often used between the gas appliance (such as gas stove) and gas supply equipment (or gas pipeline), to ensure that gas can be safely and stably transported to the stove. In the daily installation process, when the installation space around the stove is narrow, the end of the connecting pipe needs to be hard-bent, at this time, the connecting pipe bent hard is easy to loosen the joint, and the internal stress is easy to form to affect the sealing effect, and gas leakage occurs. In the daily maintenance process, when the connecting pipe needs to be scrubbed and overhauled, due to the small hard-bending angle of the pipe end, when the connecting pipe receives external force, it is also easy to loosen the joint and cause gas leakage.

[0003] The existing connecting pipe is welded with a 90° straight elbow at the end to facilitate connection, but the cost of the straight elbow is high, and the cost of the straight elbow is much higher than that of the corrugated pipe body. SUMMARY

[0004] In view of the problems in the background art, the utility model aims to provide a variable wave distance gas appliance connecting pipe, which is convenient to bend at both ends, easy to install in narrow space and pipe bending place, not easy to loosen the joint after installation, good sealing effect, no need to weld a 90° bending straight elbow, effectively reduce the cost, and convenient for users to judge the position of the corrugated pipe easy to bend, high operation convenience, solve the technical problems that the existing corrugated pipe needs to be hard-bent at the pipe end in narrow installation space, easy to loosen the joint and affect the sealing effect, and the use of 90° straight elbow is high in cost.

[0005] The above technical purpose of the utility model is realized by the following technical scheme:

[0006] A variable wave distance gas appliance connecting pipe, comprising a corrugated pipe body, a cladding layer and a connecting head assembly connected to both ends of the corrugated pipe body;

[0007] The corrugated pipe body is composed of a wide wave distance section and two dense wave distance sections, and the two dense wave distance sections are connected to both ends of the length direction of the wide wave distance section respectively;

[0008] The dense wave distance section comprises a plurality of first corrugated protrusions and a plurality of first corrugated grooves, the first corrugated protrusions are arranged outwardly protruding relative to the first corrugated grooves, and the first corrugated grooves are arranged between two adjacent first corrugated protrusions;

[0009] The wide-pitch section comprises a plurality of second corrugated protrusions and a plurality of second corrugated grooves, the second corrugated protrusions are outwardly protruding relative to the second corrugated grooves, and the second corrugated grooves are arranged between two adjacent second corrugated protrusions;

[0010] The distance L1 between the crests of two adjacent first corrugated protrusions is less than the distance L2 between the crests of two adjacent second corrugated protrusions.

[0011] The cladding layer is arranged outside the corrugated pipe body, and the cladding layer is provided with a transparent section extending in the axial direction of the corrugated pipe body, and the transparent section extends to the end of the dense-pitch section away from the wide-pitch section.

[0012] Further, the transparent section extends to the end of the dense-pitch section away from the wide-pitch section.

[0013] Further, the distance L1 between the crests of two adjacent first corrugated protrusions is 1.2mm-1.8mm.

[0014] The distance L2 between the crests of two adjacent second corrugated protrusions is 2mm-2.7mm.

[0015] Further, the connector assembly comprises a welding head and a nut, one end of the welding head is welded to the end of the dense-pitch section away from the wide-pitch section, and the other end of the welding head is connected to the nut.

[0016] Further, the dense-pitch section further comprises a welding protrusion, the welding protrusion is composed of two connected pipe sections bent and folded, and the two connected pipe sections are in close contact.

[0017] One of the connected pipe sections of the welding protrusion is welded to the welding head, and the other connected pipe section of the welding protrusion is connected to the first corrugated groove, and the thickness of the connected pipe section is the same as the wall thickness of the first corrugated protrusion.

[0018] Further, the connector assembly further comprises a sealing gasket, the sealing gasket is installed at the end of the welding head away from the corrugated pipe body, and the sealing gasket abuts at the connection between the welding head and the nut.

[0019] Further, the connector assembly further comprises a locking ring, the locking ring is sleeved at the welding connection between the welding head and the dense-pitch section, one end of the locking ring is connected to the cladding layer, and the other end of the locking ring is connected to the welding head.

[0020] Further, the connecting head assembly further comprises a dust cover, the nut is provided with a through hole along the axial direction of the bellows body, the dust cover is arranged at the position of the through hole, and the dust cover is arranged at the end of the nut away from the bellows body.

[0021] Compared with the prior art, the embodiment of the utility model has the following beneficial effects:

[0022] 1. The bellows body is composed of a wide pitch section and two narrow pitch sections, the distance L1 between the wave crests of the two adjacent first corrugated protrusions (i.e. the pitch of the narrow pitch section) is smaller than the distance L2 between the wave crests of the two adjacent second corrugated protrusions (i.e. the pitch of the wide pitch section), so that the pitch of the bellows body at both ends in the length direction is smaller than the pitch of the middle part, the softness of the two ends of the bellows body is high, the bending is facilitated, the two ends of the variable-pitch gas appliance connecting pipe are convenient to install in narrow spaces and places where the pipeline needs to be bent, a 90° elbow is not needed for welding, and the cost is effectively reduced.

[0023] 2. The bellows body is coated with a coating layer, the coating layer is provided with a transparent section along the length direction of the coating layer, and the transparent section extends to the corresponding narrow pitch section, so that the user can clearly see the pitch of the bellows body inside the variable-pitch gas appliance connecting pipe, the user is facilitated to judge which part of the bellows body is easier to bend, and the operation convenience of installing the variable-pitch gas appliance connecting pipe is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a half-sectional view of the variable-pitch gas appliance connecting pipe of one embodiment of the utility model.

[0025] Figure 2 is an enlarged view of A of Figure 1

[0026] Figure 3 is a circumferential cross-sectional view of the coating layer of the variable-pitch gas appliance connecting pipe of one embodiment of the utility model.

[0027] Figure 4 is a partial structure schematic view (half-sectional view) of the variable-pitch gas appliance connecting pipe of one embodiment of the utility model.

[0028] Figure 5 is an enlarged view of B of Figure 4

[0029] ​​The components include: corrugated pipe body 1, wide corrugation section 11, second corrugated protrusion 111, second corrugated groove 112, dense corrugation section 12, first corrugated protrusion 121, first corrugated groove 122, welding protrusion 123, connecting pipe section 1231, covering layer 2, transparent section 21, non-transparent section 22, connector assembly 3, welding head 31, abutting edge 311, nut 32, through hole 321, abutting platform 322, sealing gasket 33, locking ring 34, and dust cover 35. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis.

[0032] like Figures 1 to 5 As shown, a variable pitch gas appliance connecting pipe includes a corrugated pipe body 1, a covering layer 2, and a connector assembly 3 connected to both ends of the corrugated pipe body 1.

[0033] The bellows body 1 is composed of a wide-pitch section 11 and two dense-pitch sections 12, and the two dense-pitch sections 12 are respectively connected to the two ends of the wide-pitch section 11 in the length direction.

[0034] The dense beam segment 12 includes a plurality of first corrugated protrusions 121 and a plurality of first corrugated grooves 122. The first corrugated protrusions 121 are arranged to protrude outward relative to the first corrugated grooves 122, and the first corrugated grooves 122 are arranged between two adjacent first corrugated protrusions 121.

[0035] The wide-pitch section 11 comprises a plurality of second corrugated protrusions 111 and a plurality of second corrugated grooves 112, the second corrugated protrusions 111 are outwardly protruding relative to the second corrugated grooves 112, and the second corrugated grooves 112 are arranged between two adjacent second corrugated protrusions 111;

[0036] The distance L1 between the crests of two adjacent first corrugated protrusions 121 is less than the distance L2 between the crests of two adjacent second corrugated protrusions 111;

[0037] The cladding layer 2 is arranged outside the corrugated pipe body 1, and the cladding layer 2 is provided with a transparent section 21 extending along the axial direction of the corrugated pipe body 1, and the transparent section 21 extends to the position corresponding to the close-pitch section 12.

[0038] By arranging the corrugated pipe body 1 to comprise the wide-pitch section 11 and the two close-pitch sections 12, and the distance L1 between the crests of two adjacent first corrugated protrusions 121 (i.e. the pitch of the close-pitch section 12) is less than the distance L2 between the crests of two adjacent second corrugated protrusions 111 (i.e. the pitch of the wide-pitch section 11), so that the pitch of the corrugated pipe body 1 at the two ends in the length direction is less than the pitch of the middle part, the flexibility of the two ends of the corrugated pipe body 1 is high, which facilitates bending, so that the two ends of the variable-pitch gas appliance connecting pipe are convenient to install in narrow spaces or places where the pipeline needs to be bent, without the need of welding a 90° bent elbow, effectively reducing the cost. In addition, by arranging the cladding layer 2 outside the corrugated pipe body 1, and arranging the transparent section 21 on the cladding layer 2 extending along the length direction of the cladding layer 2, and the transparent section 21 extends to the position corresponding to the close-pitch section 12, so that the user can clearly see the pitch of the corrugated pipe body 1 inside the variable-pitch gas appliance connecting pipe, which is convenient for the user to determine which part of the corrugated pipe body 1 is easier to bend, and improves the operation convenience of installing the variable-pitch gas appliance connecting pipe.

[0039] The variable-pitch gas appliance connecting pipe has the advantages that the two ends are convenient to bend, which is convenient to install in narrow spaces or places where the pipeline needs to be bent, the joint is not easy to loosen after installation, the sealing effect is good, a 90° bent elbow is not needed to be welded, the cost is effectively reduced, the user can easily determine the position where the corrugated pipe is easy to bend, the operation convenience is high, and the technical problems that the existing corrugated pipe needs to be hard-bent at the pipe end in a narrow installation space, the joint is easy to loosen, the sealing effect is affected, and the cost is high when a 90° elbow is used are solved.

[0040] Further, the transparent section 21 extends to the end of the close-pitch section 12 away from the wide-pitch section 11.

[0041] By extending the transparent section 21 to the end of the close pitch section 12 away from the wide pitch section 11, the user can conveniently observe the bending condition of the whole close pitch section 12, and the installation is convenient.

[0042] Further, the cladding layer 2 clads to the end of the close pitch section 12 away from the wide pitch section 11, and the transparent section 21 extends through the cladding layer 2 along the axial direction of the bellows body 1, so as to extend to the end of the close pitch section 12 away from the wide pitch section 11.

[0043] Specifically, the cladding layer 2 is composed of the transparent section 21 and the non-transparent section 22, the transparent section 21 is arranged on the circumferential part of the cladding layer 2, the part of the cladding layer 2 except the transparent section 21 is the non-transparent section 22, the transparent section 21 is made of the existing transparent PVC material, and the non-transparent section 22 is made of the existing non-transparent PVC material.

[0044] In an embodiment of the utility model, the bellows body 1 is DN10 bellows with a nominal diameter of 10 mm, the distance L1 between the crests of two adjacent first corrugated protrusions 121 is 1.2-1.8 mm.

[0045] The distance L2 between the crests of two adjacent second corrugated protrusions 111 is 2-2.7 mm.

[0046] The distance between the crests of two adjacent first corrugated protrusions 121 is smaller than the distance between the crests of two adjacent second corrugated protrusions 111, the pitch of the bellows body 1 at both ends in the length direction is smaller than the pitch of the middle part, the softness of both ends of the bellows body 1 is high, the bending is convenient, and the installation in narrow space and pipe bending place is convenient.

[0047] Further, the distance L1 between the crests of two adjacent first corrugated protrusions 121 and the distance L2 between the crests of two adjacent second corrugated protrusions 111 can be adjusted according to different specifications of the bellows body 1.

[0048] It should be noted that the different pitches can be formed on the bellows body 1 by the existing close pitch equipment for secondary corrugation forming processing during production.

[0049] Further, the connecting head assembly 3 includes a welding head 31 and a nut 32, one end of the welding head 31 is welded to the end of the close pitch section 12 away from the wide pitch section 11, and the other end of the welding head 31 is connected with the nut 32.

[0050] By setting the welding head 31, the welding head 31 can connect the corrugated pipe body 1 with other pipelines or equipment, and the welding head 31 is welded with the dense wave distance section 12 to ensure the firmness and stability of the connection.

[0051] Specifically, the welding head 31 is provided with an abutting surrounding edge 311 which is outwardly folded, the nut 32 is movably sleeved with the abutting surrounding edge 311, the nut 32 is provided with an abutting table 322 which is inwardly folded, and the abutting table 322 abuts against the end face of the corrugated pipe body 1 close to the abutting surrounding edge 311.

[0052] Further, the dense wave distance section 12 further comprises a welding protrusion 123 which is composed of two connected pipe sections 1231 which are bent and folded, and the two connected pipe sections 1231 are attached to each other.

[0053] One of the connected pipe sections 1231 of the welding protrusion 123 is welded with the welding head 31, and the other connected pipe section 1231 of the welding protrusion 123 is connected with the first corrugated groove 122, and the thickness of the connected pipe section 1231 is the same as the wall thickness of the first corrugated protrusion 121.

[0054] By setting the welding protrusion 123, and the thickness of the connected pipe section 1231 of the welding protrusion 123 is the same as the wall thickness of the first corrugated protrusion 121, the two connected pipe sections 1231 are bent and folded and attached to each other, the thickness of the welding protrusion 123 formed is twice the wall thickness of the first corrugated protrusion 121, thereby improving the welding strength of the welding head 31 and the corrugated pipe body 1.

[0055] Further, the welding protrusion 123 is obtained by flattening the end of the corrugated pipe body 1.

[0056] Further, the connecting head assembly 3 further comprises a sealing washer 33 which is installed at the end of the welding head 31 away from the corrugated pipe body 1, and the sealing washer 33 abuts against the connection between the welding head 31 and the nut 32.

[0057] The welding head 31 and the nut 32 are sealed by the sealing washer 33, and the nut 32 cooperates with the sealing washer 33 to form a tight sealing structure, which can effectively prevent gas leakage at the connection.

[0058] Further, the connector assembly 3 further comprises a locking ring 34, which is sleeved on the welded joint between the welding head 31 and the wave distance section 12, one end of the locking ring 34 is connected with the cladding layer 2, and the other end of the locking ring 34 is connected with the welding head 31.

[0059] By arranging the locking ring 34, one end of the locking ring 34 is connected with the cladding layer 2, the other end of the locking ring 34 is connected with the welding head 31, and the locking ring 34 is sleeved on the welded joint between the welding head 31 and the wave distance section 12, so that a closed space is formed at the welded joint, the welded joint is protected, the sealing effect is improved, and leakage is prevented.

[0060] Specifically, one end of the locking ring 34 is buckled and pressed against the cladding layer 2, and the other end of the locking ring 34 is buckled and pressed against the welding head 31.

[0061] Specifically, when the corrugated pipe body 1 is connected with the connector assembly 3, the cladding layer 2 at the end of the corrugated pipe body 1 is removed to expose the corrugated pipe body 1 at the end, the end of the corrugated pipe body 1 is flattened to form the welding protrusion 123, the sealing washer 33 is abutted against one end of the welding head 31, the sealing washer 33 and the welding head 31 are abutted together by the nut 32, the other end of the welding head 31 is welded with the welding protrusion 123, after welding, the locking ring 34 is sleeved on the cladding layer 2, one end of the locking ring 34 extends into the space between the nut 32 and the welding head 31 and is buckled and pressed against the welding head 31, and the other end of the locking ring 34 is buckled and pressed against the cladding layer 2.

[0062] Further, the connector assembly 3 further comprises a dust cover 35, the nut 32 is provided with a through hole 321 penetrating along the axial direction of the corrugated pipe body 1, the dust cover 35 is arranged at the position of the through hole 321, and the dust cover 35 is arranged at the end of the nut 32 away from the corrugated pipe body 1.

[0063] By arranging the dust cover 35, it can be avoided that in the process of product transportation and storage, in an open or unprotected environment, foreign matters such as dust, dirt and moisture from the outside enter the inside of the corrugated pipe body 1 through the through hole 321 of the nut 32, so as to avoid that the inside of the corrugated pipe body 1 is corroded by the foreign matters and ensure the safety of subsequent use of the variable wave distance gas appliance connecting pipe.

[0064] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the present application, and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without creative efforts, and these embodiments will all fall within the protection scope of the present application.

Claims

1. A variable-pitch gas appliance connection tube, characterized by, The corrugated pipe body, the cladding layer and the connecting head assembly connected to both ends of the corrugated pipe body are included; The corrugated pipe body is composed of a wide pitch section and two close pitch sections, and the two close pitch sections are connected to the two ends of the wide pitch section in the length direction respectively; The close pitch section includes a plurality of first corrugated protrusions and a plurality of first corrugated grooves, the first corrugated protrusions are outwardly protruding relative to the first corrugated grooves, and the first corrugated grooves are arranged between two adjacent first corrugated protrusions; The wide pitch section includes a plurality of second corrugated protrusions and a plurality of second corrugated grooves, the second corrugated protrusions are outwardly protruding relative to the second corrugated grooves, and the second corrugated grooves are arranged between two adjacent second corrugated protrusions; The distance L1 between the crests of two adjacent first corrugated protrusions is less than the distance L2 between the crests of two adjacent second corrugated protrusions; The cladding layer is arranged on the outside of the corrugated pipe body, and the cladding layer is provided with a transparent section extending along the axial direction of the corrugated pipe body, and the transparent section extends to the end of the close pitch section away from the wide pitch section.

2. A variable pitch gas appliance connection tube according to claim 1, characterised in that, The transparent section extends to the end of the close pitch section away from the wide pitch section.

3. A variable pitch gas appliance connection tube according to claim 1, characterised in that, The distance L1 between the crests of two adjacent first corrugated protrusions is 1.2mm-1.8mm; The distance L2 between the crests of two adjacent second corrugated protrusions is 2mm-2.7mm.

4. The variable pitch gas appliance connection tube of claim 1, wherein, The connecting head assembly includes a welding head and a nut, one end of the welding head is welded to one end of the close pitch section away from the wide pitch section, and the other end of the welding head is connected to the nut.

5. A variable pitch gas appliance connection tube according to claim 4, characterised in that, The close pitch section further includes a welding protrusion composed of two connected pipe sections bent and folded, and the two connected pipe sections are in close contact; One connected pipe section of the welding protrusion is welded to the welding head, and the other connected pipe section of the welding protrusion is connected to the first corrugated groove, and the thickness of the connected pipe section is the same as the wall thickness of the first corrugated protrusion.

6. A variable pitch gas appliance connection tube according to claim 4, characterised in that, The connecting head assembly further includes a sealing gasket, the sealing gasket is installed at one end of the welding head away from the corrugated pipe body, and the sealing gasket abuts at the connection between the welding head and the nut.

7. A variable pitch gas appliance connection tube according to claim 4, characterised in that, The connecting head assembly further includes a locking ring, the locking ring is sleeved at the welding connection between the welding head and the close pitch section, one end of the locking ring is connected to the cladding layer, and the other end of the locking ring is connected to the welding head.

8. The variable pitch gas appliance connection pipe of claim 4, wherein, The connecting head assembly further includes a dust cover, the nut is provided with a through hole penetrating along the axial direction of the corrugated pipe body, the dust cover is arranged at the position of the through hole, and the dust cover is arranged at one end of the nut away from the corrugated pipe body.

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