CN110005889B - Stainless steel corrugated hose for connecting gas appliances - Google Patents
Stainless steel corrugated hose for connecting gas appliances Download PDFInfo
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- CN110005889B CN110005889B CN201910247922.5A CN201910247922A CN110005889B CN 110005889 B CN110005889 B CN 110005889B CN 201910247922 A CN201910247922 A CN 201910247922A CN 110005889 B CN110005889 B CN 110005889B
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- Prior art keywords
- stainless steel
- ring
- flange
- steel corrugated
- nut
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/01—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses adapted for hoses having a multi-layer wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/18—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses characterised by the use of additional sealing means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/26—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses specially adapted for hoses of metal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/28—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses for hoses with one end terminating in a radial flange or collar
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention relates to the field of gas appliance connecting pipes, in particular to a stainless steel corrugated hose for connecting gas appliances, which comprises a stainless steel corrugated pipe, an insertion type interface and a threaded interface, wherein the insertion type interface comprises a fixed nut, a first rotating nut, a reinforcing snap ring and an insertion type sealing ring; the shrunk necking flange has high rigidity and cannot be distorted and deformed when the holding force is large, and the defect of tightness check of an elastic material reinforced ring in the traditional structure is overcome; need not to add the sealing washer near the tail hole of first swivel nut, reduced the use of accessory, reduce comprehensive cost and improved production efficiency.
Description
Technical Field
The invention relates to the field of gas appliance connecting pipes, in particular to a stainless steel corrugated hose for connecting gas appliances.
Background
The stainless steel corrugated pipe is widely used in connection of a gas appliance and a gas pipeline, and generally comprises a corrugated pipe inner pipe, a rubber sleeve and a joint body, wherein the rubber sleeve is wrapped outside the corrugated pipe inner pipe and used for protecting the corrugated pipe inner pipe, and the joint body is arranged at the end part of the corrugated pipe inner pipe.
In the survival and manufacture of the stainless steel corrugated pipe, the installation of the joint body is the most critical, and the installation form of the joint body directly influences the sealing performance of the stainless steel corrugated pipe in a use state. The joint body usually comprises a rotating nut, a fixing nut and a sealing ring, wherein the rotating nut is sleeved at the end part of the stainless steel corrugated pipe in an inseparable mode, the fixing nut is in threaded connection with the rotating nut, the sealing ring is clamped between the rotating nut and the fixing nut, and when the gas pipeline or the gas appliance is connected, the sealing ring is pressed tightly through the rotating nut, so that the purpose of tightly holding the joint of the gas pipeline or the joint of the gas appliance is achieved. The inseparable connection between the swivel nut and the stainless steel corrugated pipe and the leakage problem of the swivel nut tail hole are particularly important.
The 'stainless steel corrugated hose joint assembly for gas delivery with leakage detection function' disclosed in the Chinese patent number 201020113219.X provides a technical scheme of a wave beating and strengthening ring, and discloses the following technical contents. When the gas transmission stainless steel corrugated hose is installed on site, a coating layer with a proper distance is peeled off from the end part of the gas transmission stainless steel corrugated hose, a joint nut is sleeved on the stainless steel corrugated hose, manual wave knocking (matched wave knocking tool) is carried out on the tail end of the stainless steel corrugated hose, a reinforcing ring is embedded into a wave trough of the stainless steel corrugated hose and is tightly attached to the stainless steel corrugated hose, the reinforcing ring is embedded into a joint groove, a joint component is provided with a sealing ring and a leakage detection hole, the leakage detection function of the joint is increased, and whether the gas transmission stainless steel corrugated hose leaks or not can be found in time; meanwhile, the tail hole of the joint nut in the joint assembly is enlarged, the coating layer does not need to be peeled off when the pipe sleeve joint nut is coated, the corrugated pipe is prevented from being exposed and leaked, the corrugated pipe is protected, and the product is more attractive. From the above technical solutions, no matter from which direction the reinforcement ring is assembled, the minimum diameter of the reinforcement ring is necessarily smaller than the flange rib formed after the cladding is called the outer diameter or the knocking, and the reinforcement ring is embedded into the wave trough. Therefore, it is reasonable to believe that the reinforcing ring disclosed in the technical scheme is not an elastic part, so when the holding force is increased, a gap is generated between the reinforcing ring and the flange rib or between the reinforcing ring and the joint groove after the reinforcing ring is subjected to force and torque, and then gas is leaked towards the tail hole of the rotating nut of the joint nut, so that the annular groove is machined and formed at the tail hole accessory of the joint nut in the comparison document, and the sealing ring 2 is added for cover protection. However, we have found that it is disadvantageous that the sealing ring 2 is an elastic member and the coating is also an elastic member, and although the bottom of the sealing ring in fig. 1 of the patent document is opposite to the wave trough of the corrugated stainless steel pipe, i.e. the sealing ring 2 and the wave trough of the corrugated stainless steel pipe clamp the coating, it is unlikely that the position in the drawing is reached completely when installing in the field. That is, the bottom of the sealing ring 2 may be the valley position facing the stainless steel corrugated pipe, in this case, if gas leakage occurs, a large gas pressure may press the coating layer located at the valley position directly under the sealing ring 2 toward the valley direction, and further, a gap is formed to form gas leakage.
The reinforcing ring made of elastic material has the condition of distortion and further leakage caused by holding force. As the technical improvement, a metal reinforcing ring is adopted, the metal reinforcing ring, usually stainless steel, is sleeved on the exposed stainless steel corrugated pipe part, then the residual corrugations are punched to be flatly propped against the metal reinforcing ring, and a flange rib formed after punching is welded with the reinforcing ring into a whole by a ring welding method. The disadvantages of this method are: the technical requirement of girth welding is high, and leakage can be formed when the girth welding does not meet the standard; and a welding tool needs to be carried during field installation, so that the potential safety hazard of field installation is increased, and the installation cost is increased.
In addition, the traditional interface structure mostly adopts a direct-insertion type structure, the Green joint is kept locked by the friction force between insertion type sealing sleeves after being inserted, once the stainless steel corrugated pipe is impacted by external force, tensile force along the axis of the interface is generated, and the looseness and even separation between the Green joint and the stainless steel corrugated pipe interface are easily caused, so that gas leakage is caused.
Disclosure of Invention
The invention aims to provide a stainless steel corrugated hose for connecting a gas appliance.
In order to achieve the purpose, the invention adopts the following technical scheme:
the stainless steel corrugated hose for connecting the gas appliance comprises a stainless steel corrugated pipe, an inserting type interface and a threaded interface, wherein the inserting type interface and the threaded interface are respectively arranged at two ends of the stainless steel corrugated pipe, the inserting type interface comprises a fixed nut, a first rotating nut, a reinforced snap ring and an inserting type sealing ring, the threaded interface comprises a second rotating nut and a flat gasket sealing ring, two ends of the stainless steel corrugated pipe are respectively and tightly connected with a necking flange for sleeving the first rotating nut and the second rotating nut, the outer side of the stainless steel corrugated pipe is wrapped with a coating layer made of soft materials, the fixed nut is detachably connected with the first rotating nut, the inserting type sealing ring is positioned at the inner side of the fixed nut, two ends of the inserting type sealing ring respectively abut against the fixed nut and the corresponding end face of the stainless steel corrugated pipe, the reinforced snap ring is positioned at the inner side of the fixed, the inner wall of one end of the second rotating nut, which is close to the necking flange, is provided with a tool withdrawal groove, and the flat gasket sealing ring is positioned in the tool withdrawal groove, and two ends of the flat gasket sealing ring respectively support against the groove top of the tool withdrawal groove and the end surface of the corresponding stainless steel corrugated pipe.
As a preferred scheme of the stainless steel corrugated hose for connecting gas appliances with improved structures, the lower end of the fixed nut is provided with the lower connecting part, the top of the first rotating nut is provided with the upper connecting part, the upper connecting part and the lower connecting part are of hollow cylindrical structures, the inner diameter of the upper connecting part is equal to that of the fixed nut, the inner diameter of the lower connecting part is equal to that of the first rotating nut, and the upper connecting part and the lower connecting part are detachably connected.
As an optimized scheme of the stainless steel corrugated hose for connecting the gas appliance with the improved structure, a plurality of notches which can be compressed are arranged at one end, abutted to the plug-in sealing ring, of the reinforcing clamping ring, all the notches are uniformly distributed along the circumferential direction of the reinforcing clamping ring, the outer edge of one end, far away from the plug-in sealing ring, of the reinforcing clamping ring is a conical surface, a pressing flange with a triangular cross section is arranged on the inner wall of the top of the fixing nut, and the inclined surface of the pressing flange is abutted to the conical surface of the reinforcing clamping ring.
As an optimized scheme of the stainless steel corrugated hose for connecting the gas appliance with the improved structure, the lower end of the plug-in sealing ring is abutted against the corresponding end of the stainless steel corrugated pipe, a gap is reserved between the lower end of the lower connecting part and the upper end of the corresponding necking flange, and the outer edge of the top of the necking flange is movably embedded at the bottom of the inner side of the rotating nut.
As a preferable scheme of the stainless steel corrugated hose for connecting gas appliances with improved structure, the outer wall of the upper connecting part is connected with the inner wall of the lower connecting part through screw threads.
As a preferred scheme of the stainless steel corrugated hose for connecting gas appliances with improved structure, the outer wall of the upper connecting part is symmetrically provided with two arc chutes which incline upwards along the cylindrical wall, the upper end and the lower end of each arc chute are respectively provided with a vertically downward gap and a sinking groove, the bottom of the gap is communicated with the lower side of the lower connecting part, the cylindrical wall of the lower connecting part is embedded with two cylindrical pins which are in sliding fit with the arc chutes, the joint of the fixing nut and the lower connecting part is provided with an annular accommodating groove which extends upwards, the depth of the annular accommodating groove is less than the height of the fixing nut, the annular accommodating groove is internally provided with a spring and a touch ring, the touch ring is positioned below the spring, and the upper and lower ends of the abutting ring respectively abut against the groove top and the abutting ring of the annular accommodating groove, the inner wall of the lower end of the annular accommodating groove is fixedly embedded with an anti-falling ring, and the distance between the inner wall of the anti-falling ring and the outer wall of the lower connecting part is greater than the wall thickness of the lower connecting part.
As a preferred scheme of the stainless steel corrugated hose for connecting the gas appliance with the improved structure, the tool withdrawal groove is positioned at one end, close to the stainless steel corrugated pipe, of the inner side of the second rotating nut, the outer edge of the end part of the necking flange is movably embedded in the tool withdrawal groove, the flat gasket sealing ring is positioned in the tool withdrawal groove, the bottom of the flat gasket sealing ring is attached to one end, far away from the plug-in connector, of the stainless steel corrugated pipe, and the outer diameter of the flat gasket sealing ring is larger than the inner diameter of the second rotating nut and smaller than the diameter of the tool withdrawal groove.
As a preferable scheme of the stainless steel corrugated hose for connecting the gas appliance with the improved structure, the outer edges of two ends of the flat gasket sealing ring are both in a round angle structure.
As a preferable scheme of the stainless steel corrugated hose for connecting the gas appliance with the improved structure, the left end of the reducing flange is extended and provided with a flange edge, the inner side of the reducing flange is provided with an inner snap ring at a position corresponding to the flange edge, the end part of one side of the reducing flange with the flange edge is provided with an annular groove, and the left side of the reducing flange is of a tubular structure for tightly holding the coating layer on the outer side of the stainless steel corrugated pipe.
A stainless steel corrugated hose for connecting a gas appliance is provided, and the mounting process of a necking flange comprises the following steps:
and 4, flattening the stainless steel corrugated pipe remained outside the necking flange, pressing the flattened part of the stainless steel corrugated pipe into an annular groove of the necking flange, wherein the depth of the annular groove is at least less than the flattening thickness of two complete wave crests, so as to ensure that the flattened thickness of the continuous wave crests is higher than that of the annular groove.
The invention has the beneficial effects that: the invention adopts a necking flange made of metal to tightly hold the coating layer of the stainless steel corrugated pipe, the inner snap ring of the necking flange after being shrunk is embedded into the wave trough of the exposed stainless steel corrugated pipe, the remained exposed stainless steel corrugated pipe is pressed into the annular groove at the front end of the necking flange after being flattened, the sealing between the necking flange and the stainless steel corrugated pipe is realized by pressing an inserted sealing sleeve after a fixed nut and a first rotating nut are rotated and locked, a tool withdrawal groove is processed and formed in a second rotating nut, a flat gasket sealing ring is arranged in the tool withdrawal groove, and the flat gasket sealing ring can be pressed when the joint of a gas pipeline is in threaded connection with the second rotating nut, so that the sealing performance is strong. The defects of high technical difficulty and high air leakage risk of end girth welding reinforced rings in the traditional process are overcome; the field installation need not to be equipped with welding tool, reduces the field installation cost, has removed the safety risk that needs welding operation when the field installation: the shrunk necking flange has high rigidity and cannot be distorted and deformed when the holding force is large, and the defect of tightness check of an elastic material reinforced ring in the traditional structure is overcome; need not to add the sealing washer near first swivel nut's tail-hole, the use of accessory has been reduced, reduce comprehensive cost and improved production efficiency, increase the reinforcing snap ring in fixation nut, can exert outside pressure with the reinforcing snap ring when bayonet sealing cover is further compressed, the reinforcing snap ring receives the inboard toper conflict face of fixation nut to block the back and forms the shrink and block the Green joint, reach the effect of strengthening the power of holding tightly to the Green joint, make the Green joint difficult not hard up, connect more stably.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic cross-sectional view of a necking flange of the present invention.
Fig. 2 is a schematic view of the process flow for installing the necking flange.
Fig. 3 is a schematic view of the connection state of the plug-in interface of the present invention.
Fig. 4 is a schematic perspective view of the reinforced snap ring of the present invention.
Fig. 5 is a schematic view showing a connection state of the screw interface of the present invention.
Fig. 6 is a perspective view of another embodiment of a plug-in interface.
Fig. 7 is an exploded perspective view of fig. 6.
Fig. 8 is a plan sectional view of fig. 6.
In the figure: the corrugated stainless steel pipe comprises a corrugated stainless steel pipe 1, a first rotating nut 2, a reinforcing clamping ring 3, an insertion type sealing ring 4, a second rotating nut 5, a flat gasket sealing ring 6, a necking flange 7, a tool withdrawal groove 8, a lower connecting part 9, an upper connecting part 10, a notch 11, a conical surface 12, a pressing flange 13, an arc-shaped sliding groove 14, a notch 15, a sinking groove 16, a cylindrical pin 17, an annular accommodating groove 18, a spring 19, an interference ring 20, an anti-falling ring 21, a flange edge 22, an inner clamping ring 23, an annular groove 24, a tubular structure 25, a coating layer 26 and a fixing nut 27.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and the specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being fixed or detachable or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The first embodiment is as follows:
referring to fig. 1 to 5, the corrugated stainless steel pipe with an improved structure includes a corrugated stainless steel pipe 1, an insertion interface and a screw interface, the insertion interface and the screw interface are respectively disposed at two ends of the corrugated stainless steel pipe 1, the insertion interface includes a fixing nut 27, a first rotating nut 2, a reinforcing snap ring 3 and an insertion seal ring 4, the screw interface includes a second rotating nut 5 and a flat gasket seal ring 6, two ends of the corrugated stainless steel pipe 1 are respectively and tightly connected with a necking flange 7 for the first rotating nut 2 and the second rotating nut 5 to be sleeved, the outer side of the corrugated stainless steel pipe 1 is wrapped with a coating layer 26 made of a soft material, the fixing nut 27 is detachably connected with the first rotating nut 2, the insertion seal ring 4 is located at the inner side of the fixing nut 27 and two ends thereof respectively abut against the fixing nut 27 and the end face of the corresponding corrugated stainless steel pipe 1, the reinforced clamp ring 3 is positioned at the inner side of the fixed nut 27, one end of the reinforced clamp ring is tightly abutted to the inserted sealing ring 4, the inner wall of one end of the second rotating nut 5, which is close to the necking flange 7, is provided with a tool withdrawal groove 8, the flat gasket sealing ring 6 is positioned in the tool withdrawal groove 8, and the two ends of the flat gasket sealing ring respectively tightly abut against the groove top of the tool withdrawal groove 8 and the end surface of the corresponding stainless steel corrugated pipe 1.
The lower extreme of fixation nut 27 is equipped with down connecting portion 9, and the top of first swivel nut 2 is equipped with connecting portion 10, goes up connecting portion 10 and lower connecting portion 9 and is the hollow cylinder structure, and the internal diameter of going up connecting portion 10 equals with fixation nut 27's internal diameter, and the internal diameter of lower connecting portion 9 equals with the internal diameter of first swivel nut 2, goes up connecting portion 10 and can dismantle with lower connecting portion 9 and be connected.
The one end that reinforcing snap ring 3 contradicts with bayonet sealing washer 4 is equipped with a plurality of and can receives the incision 11 that compress tightly, and all incisions 11 are along reinforcing snap ring 3's circumferencial direction evenly distributed, and the one end outer fringe that bayonet sealing washer 4 was kept away from to reinforcing snap ring 3 is conical surface 12, and fixation nut 27's top inner wall is equipped with a cross-section and is triangle-shaped's pressure flange 13, and pressure flange 13's inclined plane is inconsistent with reinforcing snap ring 3's conical surface 12. The reinforced snap ring 3 is made of plastic with strength such as POM, PE, PA and the like, and the reinforced snap ring embraces the Green interface due to inward holding of the notch 15 during screwing, so that the effect of enhancing the tightening force is achieved.
The lower end of the plug-in sealing ring 4 is abutted against the corresponding end of the stainless steel corrugated pipe 1, a gap is reserved between the lower end of the lower connecting part 9 and the upper end of the corresponding necking flange 7, and the outer edge of the top of the necking flange 7 is movably embedded at the bottom of the inner side of the rotating nut.
The outer wall of the upper connecting part 10 is connected with the inner wall of the lower connecting part 9 through threads.
The tool withdrawal groove 8 is located at one end, close to the stainless steel corrugated pipe 1, of the inner side of the second rotating nut 5, the outer edge of the end portion of the necking flange 7 is movably embedded in the tool withdrawal groove 8, the flat gasket sealing ring 6 is located in the tool withdrawal groove, the bottom of the flat gasket sealing ring 6 is attached to one end, far away from the insertion type interface, of the stainless steel corrugated pipe 1, and the outer diameter of the flat gasket sealing ring 6 is larger than the inner diameter of the second rotating nut 5 and smaller than the diameter of the tool withdrawal groove 8.
The outer edges of the two ends of the flat gasket sealing ring 6 are of a fillet structure. The flat gasket sealing ring 6 is provided with a round angle, so that the installation is convenient, the flat gasket sealing ring 6 and the tool withdrawal groove 8 are provided with gaps, and the flat gasket sealing ring 6 can rotate freely and is not easy to drop off during installation.
Fig. 1 is a cross-sectional view of a throat flange 7, the throat flange 7 is made of a metal material with good extensibility, and does not crack during compression, and the rigidity after compression can be ensured, as shown in fig. 1, a flange edge 22 is arranged at the left end of the throat flange 7 in an extending manner, an inner snap ring 23 is arranged at a position, corresponding to the flange edge 22, on the inner side of the throat flange 7, an annular groove 24 is arranged at the end part of one side of the throat flange 7 with the flange edge 22, and a tubular structure 25 for tightly holding an outer coating 26 of a stainless steel corrugated pipe 1 is arranged at the left side of the throat flange 7.
A stainless steel corrugated hose for connecting a gas appliance, wherein the mounting process of a necking flange 7 comprises the following steps:
and 4, flattening the stainless steel corrugated pipe 1 remained outside the necking flange 7, pressing the flattened part of the stainless steel corrugated pipe 1 into an annular groove 24 of the necking flange 7, wherein the depth of the annular groove 24 is at least less than the flattening thickness of two complete wave crests, so as to ensure that the flattened thickness of the continuous wave crests is higher than that of the annular groove 24, and further ensure that the inserted sealing sleeve can compress the flattened part after the fixing nut 27 and the first rotating nut 2 are locked.
The working principle is as follows: according to the invention, the necking flange 7 made of metal material tightly holds the coating layer 26 of the stainless steel corrugated pipe 1, the inner snap ring 23 of the necking flange 7 after being shrunk is embedded into the wave trough of the exposed stainless steel corrugated pipe 1, the remained exposed stainless steel corrugated pipe 1 is pressed into the annular groove 24 at the front end of the necking flange 7 after being flattened, the sealing between the necking flange 7 and the stainless steel corrugated pipe 1 is realized by a pressing and inserting type sealing sleeve mode after the fixing nut 27 and the first rotating nut 2 are rotated and locked, the tool withdrawal groove 8 is processed and formed in the second rotating nut 5, the flat gasket sealing ring 6 is arranged in the tool withdrawal groove 8, the flat gasket sealing ring 6 is pressed when the joint of a gas pipeline is in threaded connection with the second rotating nut 5, and the sealing performance is strong.
The second embodiment is as follows:
the difference from the first embodiment is that, in addition to the threaded connection, the upper connecting portion 10 and the lower connecting portion can be realized by the scheme shown in fig. 5 to 8, specifically, two arc chutes 14 inclined upward along the cylindrical wall are symmetrically arranged on the outer wall of the upper connecting portion 10, the upper end and the lower end of each arc chute 14 are respectively provided with a vertically downward notch 15 and a sinking groove 16, the bottom of the notch 15 is communicated with the lower side of the lower connecting portion 9, two cylindrical pins 17 slidably engaged with the arc chutes 14 are embedded on the cylindrical wall of the lower connecting portion 9, the joint of the fixing nut 27 and the lower connecting portion 9 is provided with an annular receiving groove 18 extending upward, the depth of the annular receiving groove 18 is smaller than the height of the fixing nut 27, a spring 19 and an interference ring 20 are arranged in the annular receiving groove 18, the interference ring 20 is located below the spring 19, and the upper end and the lower end of the interference ring 20 respectively abut against the groove top of the annular receiving groove 18 and the interference ring 20, the inner wall of the lower end of the annular accommodating groove 18 is fixedly embedded with an anti-slip ring 21, and the distance between the inner wall of the anti-slip ring 21 and the outer wall of the lower connecting part 9 is greater than the wall thickness of the lower connecting part 9. When the connecting device is used, the upper connecting part 10 is symmetrically inserted into the upper connecting part 10, the two cylindrical pins 17 enter the corresponding arc-shaped sliding grooves 14 from the corresponding notches 15, then the first rotary nut 2 is rotated, the cylindrical pins 17 slide to the top ends of the arc-shaped sliding grooves 14, the top of the upper connecting part 10 enters the annular accommodating groove 18 and upwards abuts against the contact ring 20 in the process, so that the spring 19 downwards extrudes the contact ring 20, when the cylindrical pins 17 move to the top ends of the arc-shaped sliding grooves 14, the upper connecting part 10 receives the downward pressure of the contact ring 20 under the action of the downward pressure of the spring 19, the cylindrical pins 17 are smoothly pressed downwards and clamped in the sinking grooves 16, and further the first rotary nut 2 is prevented from being reversely loosened in the using process, and compared with threaded connection, the connecting device is high in installation speed and efficiency.
It should be understood that the above-described embodiments are merely preferred embodiments of the invention and the technical principles applied thereto. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, such variations are within the scope of the invention as long as they do not depart from the spirit of the invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.
Claims (8)
1. The utility model provides a stainless steel corrugated hose is used in connection of gas apparatus, a serial communication port, including corrugated stainless steel pipe (1), bayonet interface and hickey set up respectively in corrugated stainless steel pipe (1) both ends, bayonet interface includes fixation nut (27), first swivel nut (2), reinforcing snap ring (3) and bayonet sealing washer (4), hickey includes second swivel nut (5) and flat packing sealing washer (6), the equal fastening connection in both ends of corrugated stainless steel pipe (1) has throat flange (7) that are used for supplying first swivel nut (2) and second swivel nut (5) to cup joint, the outside parcel of corrugated stainless steel pipe (1) has covering layer (26) that soft material made, fixation nut (27) can be dismantled with first swivel nut (2) and be connected, bayonet sealing washer (4) are located the inboard of fixation nut (27) and both ends are supported tight fixation nut (27) respectively and the stainless steel corrugated steel pipe that corresponds with both ends The reinforced clamp ring (3) is positioned on the inner side of the fixing nut (27) and one end of the reinforced clamp ring is tightly abutted to the inserted sealing ring (4), the inner wall of one end, close to the necking flange (7), of the second rotating nut (5) is provided with a tool withdrawal groove (8), the flat gasket sealing ring (6) is positioned in the tool withdrawal groove (8), and the two ends of the flat gasket sealing ring are respectively abutted to the groove top of the tool withdrawal groove (8) and the corresponding end surface of the stainless steel corrugated pipe (1);
the left end of the reducing flange (7) extends outwards to form a flange edge (22), an inner snap ring (23) is arranged at the position, corresponding to the flange edge (22), of the inner side of the reducing flange (7), an annular groove (24) is formed in the end portion of one side, provided with the flange edge (22), of the reducing flange (7), and the left side of the reducing flange (7) is provided with a tubular structure (25) used for tightly holding a coating layer (26) on the outer side of the stainless steel corrugated pipe (1);
the mounting process of the necking flange (7) comprises the following steps:
step 1, stripping a coating layer (26) with a proper length, and exposing three complete wave troughs after stripping;
step 2, sleeving the necking flange (7) to enable an inner snap ring (23) of the necking flange (7) to be opposite to a nearest complete wave trough of the coating layer (26), wherein a gap of 0.05-0.1 mm is left on a single side between the inner diameter of the inner snap ring (23) and the outer diameter of the stainless steel corrugated pipe (1);
step 3, compressing the overall dimension of the necking flange (7) by adopting a necking die or a necking tool, after compression, tightly holding the tubular part of the necking flange (7) and the coating layer (26), and simultaneously embedding the bottom of the inner snap ring (23) into the wave trough of the stainless steel corrugated pipe (1);
and 4, flattening the stainless steel corrugated pipe (1) remained outside the necking flange (7), pressing the flattened part of the stainless steel corrugated pipe (1) into an annular groove (24) of the necking flange (7), wherein the depth of the annular groove (24) is at least less than the flattening thickness of two complete wave crests, so as to ensure that the flattened thickness of the continuous wave crests is higher than that of the annular groove (24).
2. The stainless steel corrugated hose for connection of gas appliances according to claim 1, wherein the lower end of the fixing nut (27) is provided with a lower connecting portion (9), the top of the first rotating nut (2) is provided with an upper connecting portion (10), the upper connecting portion (10) and the lower connecting portion (9) are both hollow cylindrical structures, the inner diameter of the upper connecting portion (10) is equal to that of the fixing nut (27), the inner diameter of the lower connecting portion (9) is equal to that of the first rotating nut (2), and the upper connecting portion (10) and the lower connecting portion (9) are detachably connected.
3. The stainless steel corrugated hose for connecting gas appliances according to claim 2, wherein the end of the reinforcing snap ring (3) abutting against the plug-in seal ring (4) is provided with a plurality of notches (11) which can be compressed, all the notches (11) are uniformly distributed along the circumferential direction of the reinforcing snap ring (3), the outer edge of the end of the reinforcing snap ring (3) far away from the plug-in seal ring (4) is a conical surface (12), the inner wall of the top of the fixing nut (27) is provided with a pressing flange (13) with a triangular cross section, and the inclined surface of the pressing flange (13) abuts against the conical surface (12) of the reinforcing snap ring (3).
4. The stainless steel corrugated hose for connecting gas appliances according to claim 3, wherein the lower end of the plug-in sealing ring (4) abuts against the corresponding end of the stainless steel corrugated hose (1), a gap is left between the lower end of the lower connecting portion (9) and the upper end of the corresponding reducing flange (7), and the outer edge of the top of the reducing flange (7) is movably embedded in the bottom of the inner side of the rotating nut.
5. The corrugated stainless steel hose for gas appliances according to claim 2, wherein the outer wall of the upper connecting portion (10) is screwed to the inner wall of the lower connecting portion (9).
6. The stainless steel corrugated hose for connecting gas appliances according to claim 2, wherein the outer wall of the upper connecting portion (10) is symmetrically provided with two arc chutes (14) inclined upwards along the cylindrical wall, the upper end and the lower end of each arc chute (14) are respectively provided with a vertically downward notch (15) and a sinking groove (16), the bottom of the notch (15) is communicated with the lower side of the lower connecting portion (9), the cylindrical wall of the lower connecting portion (9) is embedded with two cylindrical pins (17) in sliding fit with the arc chutes (14), the joint of the fixing nut (27) and the lower connecting portion (9) is provided with an upwardly extending annular accommodating groove (18), the depth of the annular accommodating groove (18) is smaller than the height of the fixing nut (27), the annular accommodating groove (18) is internally provided with a spring (19) and an interference ring (20), the interference ring (20) is positioned below the spring (19), and the upper end and the lower end of the contact ring (20) respectively contact the groove top of the groove (18) and the contact ring (20) in the shape of the ring (20), the inner wall of the lower end of the ring-shaped accommodating groove (18) is fixedly embedded with an anti-falling ring (21), and the distance between the inner wall of the anti-falling ring (21) and the outer wall of the lower connecting part (9) is greater than the wall thickness of the lower connecting part (9).
7. The stainless steel corrugated hose for connecting gas appliances according to claim 1, wherein the tool withdrawal groove (8) is located at one end of the inner side of the second rotating nut (5) close to the stainless steel corrugated pipe (1), the outer edge of the end part of the necking flange (7) is movably embedded in the tool withdrawal groove (8), the flat gasket sealing ring (6) is located in the tool withdrawal groove, the bottom of the flat gasket sealing ring (6) is attached to one end of the stainless steel corrugated pipe (1) far away from the plug-in connector, and the outer diameter of the flat gasket sealing ring (6) is larger than the inner diameter of the second rotating nut (5) and smaller than the diameter of the tool withdrawal groove (8).
8. The stainless steel corrugated hose for connection of gas appliances according to claim 1, wherein the outer edges of both ends of the flat gasket seal ring (6) are rounded.
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| CN201910247922.5A CN110005889B (en) | 2019-03-29 | 2019-03-29 | Stainless steel corrugated hose for connecting gas appliances |
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| CN201910247922.5A CN110005889B (en) | 2019-03-29 | 2019-03-29 | Stainless steel corrugated hose for connecting gas appliances |
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| CN110005889A CN110005889A (en) | 2019-07-12 |
| CN110005889B true CN110005889B (en) | 2021-02-09 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111167332A (en) * | 2020-01-15 | 2020-05-19 | 无锡市张华医药设备有限公司 | Flexible sealed telescopic explosion-proof stirrer |
| CN111618580A (en) * | 2020-06-18 | 2020-09-04 | 朋志鹏 | Automatic assembly equipment for plug-in connector of corrugated pipe |
| CN212455886U (en) * | 2020-06-29 | 2021-02-02 | 菲时特集团股份有限公司 | Anti-reflux braided tube assembly |
| CN114054609B (en) * | 2022-01-11 | 2022-05-10 | 宁波市昕伊达能源设备制造有限公司 | Automatic forming device for stainless steel corrugated pipe joint for gas appliance |
| CN116045091B (en) * | 2023-02-03 | 2023-07-04 | 浙江万全管业有限公司 | Stainless steel corrugated hose for fuel gas and processing technology |
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| EP0879981A2 (en) * | 1997-05-20 | 1998-11-25 | Sergio Castelli | Improved rotary coupling for the hermetic connection of corrugated flexible metal hoses |
| CN203442390U (en) * | 2013-08-15 | 2014-02-19 | 宁波美妙电器有限公司 | Quick joint for novel vehicle washer |
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| KR20190010412A (en) * | 2018-04-27 | 2019-01-30 | 목성균 | A Connection Device Of Corrugated Tube |
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| EP0879981A2 (en) * | 1997-05-20 | 1998-11-25 | Sergio Castelli | Improved rotary coupling for the hermetic connection of corrugated flexible metal hoses |
| CN203442390U (en) * | 2013-08-15 | 2014-02-19 | 宁波美妙电器有限公司 | Quick joint for novel vehicle washer |
| CN204004893U (en) * | 2014-07-18 | 2014-12-10 | 宁波忻杰燃气用具实业有限公司 | Gas appliance connects with stainless steel ripple flexible pipe |
| CN205781588U (en) * | 2016-06-08 | 2016-12-07 | 宁波天鑫金属软管有限公司 | A kind of Green's joint design |
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| CN110005889A (en) | 2019-07-12 |
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