Socket connecting interface of armored metal-coated hose for gas appliance

Abstract

The utility model discloses a socket connection interface of an armored metal-coated hose for gas appliances, which comprises a rubber tube, a double-buckle metal armored hose is sleeved on the outer side of the rubber tube, a metal sleeve is arranged on one side of the double-buckle metal armored hose, the metal sleeve comprises a connection area and a clamping area, and the connection area is connected with the clamping area. A first skirt edge is formed on the side, away from the connecting area, of the clamping area, and a plastic head is formed on one side of the rubber pipe and located on the outer side of the metal sleeve in an injection molding mode. The plastic heads are formed on the surfaces of the metal sleeve and the double-buckle metal armored hose in an injection molding mode, meanwhile, the plastic heads and the rubber hose are fused into a whole, gaps at the connecting positions are filled with the plastic heads, the plastic heads in the liquid state fill the two sides of the first skirt edge of the clamping area, and then the plastic heads are solidified to be solid relative to the smooth metal sleeve. The metal sleeve provided with the first skirt edge is more difficult to separate from the plastic head, the tensile property between the metal sleeve and the plastic head is improved, and as the plastic head is fixedly mounted on the rubber tube, the tensile property of the rubber tube and the double-buckle metal armored hose is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hoses, and particularly relates to a socket connection interface of an armored metal-clad hose for gas appliances. Background Art

[0002] Since August 1, 2024, rubber hoses can only be used as the inner tubes of metal-clad hoses and cannot be directly used to connect gas appliances. Therefore, the hoses currently used to connect gas cookers are mainly stainless steel corrugated hoses and metal-clad hoses. Among them, stainless steel corrugated hoses are divided into ordinary type and super flexible type. The ordinary type is mainly applicable to fixedly installed gas cookers and other gas appliances, while the super flexible type can also be applied to non-fixedly installed gas cookers and other gas appliances. Metal-clad hoses are mainly applicable to both fixedly and non-fixedly installed gas appliances and the connection of liquefied gas cylinders.

[0003] Metal-clad hoses are specifically divided into braided metal-clad hoses and armored metal-clad hoses. Among them, the armored metal-clad hose is a single- or double-buckle armored hose wound by steel strips. Since the single-buckle armored hose has poor tensile and anti-deformation properties, the double-buckle armored hose is now the mainstream product.

[0004] At present, almost all socket connection interfaces of domestic-produced armored metal-clad hoses adopt the injection molding process. The plastic connector formed by injection molding is melted into one body with the rubber hose, and at the same time, it is also melted into one body with the armored hose outside the rubber hose. The previous national and industrial standards had relatively low requirements. As long as the inner rubber hose does not fall off and does not leak gas when the socket connection interface withstands a tensile force of 400N, it is considered qualified, regardless of damage or detachment of the outer metal protective layer. However, the new national standard has increased the tensile requirement, and the outer armored hose should also have non-disengaging buckles and no other obvious damage under tensile force. Therefore, it is necessary to design a socket connection interface with higher tensile strength. Content of the Utility Model

[0005] In order to solve at least one technical problem mentioned in the background art, the purpose of the utility model is to provide a socket connection interface of an armored metal-clad hose for gas appliances, so as to improve the tensile strength.

[0006] To achieve the above object, the present utility model provides the following technical solution: A socket connection interface for an armored metal-clad hose used in a gas appliance, including a rubber hose, a double-riveted metal armored hose is sleeved outside the rubber hose, a metal sleeve is provided on one side of the double-riveted metal armored hose, the metal sleeve includes a connection area and a clamping area, a threaded protrusion is provided on the inner wall of the connection area, and the threaded protrusion is adapted to the threaded groove on the surface of the double-riveted metal armored hose. A groove is formed on the outer circumferential surface of the clamping area, and a first skirt is formed on the side of the clamping area away from the connection area. A plastic head is injection-molded on one side of the rubber hose and outside the metal sleeve, and the clamping area is located inside the plastic head.

[0007] Further, a bushing is sleeved outside the rubber hose, and the bushing is located inside the double-riveted metal armored hose.

[0008] A second skirt is formed on one side of the bushing, and the first skirt abuts against the second skirt.

[0009] Further, the angle of the radial straight line of the first skirt relative to the axis of the metal sleeve is α, and α is less than 90 degrees.

[0010] Further, a clamping groove is provided on the circumferential surface of the plastic head, a hose clamp is installed at the position of the clamping groove on the plastic head, and ribs are provided on the inner wall of the clamping groove.

[0011] Further, a plastic protective layer is coated on the surface of the double-riveted metal armored hose.

[0012] Further, a metal ferrule is sleeved on the tail of the plastic head.

[0013] Compared with the prior art, the beneficial effect of the present utility model is that the plastic head is injection-molded on the surface of the metal sleeve. Since the formation of the plastic head changes from liquid to solid, the liquid plastic head will fill the groove in the clamping area and both sides of the first skirt, and then the plastic head solidifies into a solid state. At this time, under the mutual action of the side of the groove, the first skirt and the plastic head, compared with the smooth metal sleeve, the metal sleeve provided with the groove and the first skirt will be more difficult to break away from the plastic head, thereby improving the tensile resistance between the metal sleeve and the plastic head. Since the plastic head is fixedly installed on the rubber hose and the double-riveted metal armored hose is installed on the metal sleeve, the tensile resistance between the rubber hose and the double-riveted metal armored hose is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the overall structural schematic diagram of the present utility model;

[0015] Figure 2 is the front view of the overall structure of the present utility model;

[0016] Figure 3 is the full sectional view of the overall structure of the present utility model;

[0017] Figure 4 This is a partial sectional view of the overall structure of the present utility model.

[0018] In the figure: 1, rubber hose; 2, double - locked metal armored hose; 3, metal sleeve; 31, connection area; 32, clamping area; 33, groove; 34, first skirt; 4, plastic head; 5, bushing; 6, second skirt; 7, card slot; 8, hose clamp; 9, ferrule. Specific embodiments

[0019] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] This embodiment provides for reference to Figure 1 and Figure 3 This embodiment provides a socket connection interface for an armored metal - clad hose used in gas appliances, including a rubber hose 1. A double - locked metal armored hose 2 is sleeved outside the rubber hose 1. A metal sleeve 3 for fixing the double - locked metal armored hose 2 is arranged on one side of the rubber hose 1. A plastic head 4 is injection - molded on one side of the rubber hose 1 and outside the metal sleeve 3.

[0021] First, the double - locked metal armored hose 2 is sleeved outside the rubber hose 1 to strengthen the protection of the rubber hose 1. Then, the metal sleeve 3 is connected to the end of the double - locked metal armored hose 2. Next, the plastic head 4 is injection - molded on one side of the rubber hose 1. Among them, part of the metal sleeve 3 is also wrapped by the plastic head 4, so that the metal sleeve 3 is fixed to the rubber hose 1 through the plastic head 4, and further the end of the double - locked metal armored hose 2 is fixed to the end of the rubber hose 1.

[0022] Please refer to Figure 3 Among them, the metal sleeve 3 includes a connection area 31 and a clamping area 32. Threaded protrusions are arranged on the inner wall of the connection area 31, and the threaded protrusions are adapted to the thread grooves on the surface of the double - locked metal armored hose 2. Since the plastic head 4 is injection - molded on the surface of the metal sleeve 3, in order to strengthen the tight connection between the metal sleeve 3 and the plastic head 4, that is, to strengthen the tensile strength between the metal sleeve 3 and the plastic head 4, a groove 33 is formed on the outer - circular side of the clamping area 32, and a first skirt 34 is formed on the side of the clamping area 32 away from the connection area 31.

[0023] The plastic head 4 is injection-molded on the surface of the metal sleeve 3. Since the plastic head 4 is formed from a liquid state to a solid state, the liquid plastic head 4 will fill the grooves 33 in the clamping area 32 and both sides of the first skirt 34. Then the plastic head 4 solidifies into a solid state. At this time, under the interaction force between the side of the groove 33, the first skirt 34 and the plastic head 4, compared with the smooth metal sleeve 3, the metal sleeve 3 provided with the groove 33 and the first skirt 34 is more difficult to separate from the plastic head 4, improving the tensile strength between the metal sleeve 3 and the plastic head 4. Since the plastic head 4 is fixedly installed on the rubber hose 1, that is, the tensile performance between the rubber hose 1 and the double-wire metal armored hose 2 is improved.

[0024] Since the double-wire metal armored hose 2 is made of metal material, the end of the double-wire metal armored hose 2 is relatively sharp. When the pipeline bends or shakes, etc., the rubber hose 1 comes into contact with it, and the rubber hose is easily scratched.

[0025] Please refer to Figure 3 , to solve the above technical problems. A bushing 5 is sleeved outside the rubber hose 1, and the bushing 5 is located inside the double-wire metal armored hose 2. The contact between the end of the double-wire metal armored hose 2 and the rubber hose 1 is isolated by the bushing 5 to protect the rubber hose 1. To prevent the bushing 5 from slipping, a second skirt 6 is formed on one side of the bushing 5, and the first skirt 34 abuts against the second skirt 6. During the injection molding process of the plastic head 4, the plastic head 4 wraps the second skirt 6, thereby fixing the bushing 5 outside the rubber hose 1.

[0026] As Figure 4 shown, to strengthen the tight connection between the first skirt 34 and the plastic head 4. The angle between the radial straight line of the first skirt 34 and the axis of the metal sleeve 3 is less than 90 degrees (that is, the angle between the radial straight line L2 of the first skirt 34 and the axis L1 of the metal sleeve 3 is α, and the angle of α is less than 90 degrees). After the plastic head 4 is injection-molded to wrap the first skirt 34, the overall strength of the plastic head 4 and the double-wire metal armored hose 2 is further improved.

[0027] Among them, to strengthen the tensile strength of the plastic head 4. A clamping groove 7 is formed on the circumferential side surface of the plastic head 4, and a hose clamp 8 is installed on the plastic head 4 at the position of the clamping groove 7, and ribs are provided on the inner wall of the clamping groove 7. The connection strength between the plastic head 4 and the hose clamp 8 is strengthened by the ribs in the clamping groove 7, so that the hose clamp 8 cannot fall off easily. At the same time, through the friction force between the hose clamp 8 and the ribs in the clamping groove 7, the tensile strength of the plastic head 4 is improved.

[0028] Please refer to Figure 2 , among which, a ferrule 9 is sleeved on the tail of the plastic head 4. The ferrule 9 is made of metal material, and the ferrule 9 is used to hinder the deformation degree of the plastic head 4 (when the double-wire metal armored hose is subjected to tension, the metal sleeve inside the plastic head will pull the plastic head to have a tendency of expansion and deformation, and the ferrule 9 is used to hinder the plastic head from deforming), further strengthening the tensile strength between the plastic head 4 and the metal sleeve 3.

[0029] Since the double-wire metal armored hose 2 is exposed to the air, if water stains, soy sauce and other substances adhere to its surface, it is easy to cause oxidation or corrosion of the double-wire metal armored hose 2. To protect the double-wire metal armored hose 2, a plastic protective layer is coated on the surface of the double-wire metal armored hose 2 to protect the double-wire metal armored hose 2, reduce the damage to the double-wire metal armored hose 2, and further improve the tensile strength of the double-wire metal armored hose 2.

[0030] Principle: By screwing the metal sleeve 3 with internal threaded wire into the outside of the port of the double-wire metal armored hose 2 and fastening it, the defect that the port part of the double-wire metal armored hose 2 is easily pulled apart is reduced, and the tensile strength of the double-wire metal armored hose 2 is improved; at the same time, there is a groove 33 and a first skirt 34 at the front end of the metal sleeve 3. The liquid plastic after injection molding will fill into the groove 33 and wrap the first skirt 34. At the same time, the liquid plastic wraps part of the double-wire metal armored hose 2 and melts into one body with the rubber hose 1 to fill the gap at the joint, thereby improving the overall tensile strength of the plastic head 4, the metal sleeve 3 and the double-wire metal armored hose 2, and preventing the double-wire metal armored hose 2 from being easily pulled out of the plastic head 4; at the same time, a metal ferrule 9 is sleeved on the tail of the plastic head 4 and fastened by crimping to further strengthen the tensile strength of the socket connection interface.

[0031] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention.

Claims

1. A socket connection interface for an armored metal-clad hose for a gas appliance, comprising a hose (1), a double-buckle metal-clad hose (2) being sheathed on the outside of the hose (1), a metal sheath (3) being provided on one side of the double-buckle metal-clad hose (2), characterized in that: The metal sleeve (3) comprises a connection area (31) and a clamping area (32); a threaded protrusion is provided on the inner wall of the connection area (31); the threaded protrusion is matched with a threaded groove on the surface of the double-buckle metal armored hose (2); a groove (33) is formed on the outer circular side surface of the clamping area (32); a first skirt (34) is formed on a side of the clamping area (32) away from the connection area (31); a plastic head (4) is injection-molded on one side of the rubber hose (1) and located outside the metal sleeve (3); and the clamping area (32) is located inside the plastic head (4).

2. The socket connection interface of the armored metal-clad hose for gas appliances according to claim 1, characterized in that: The outer side of the rubber hose (1) is provided with a bushing (5), and the bushing (5) is located on the inner side of the double-buckle metal armored hose (2).

3. The socket connection interface of the armored metal-clad hose for gas appliances according to claim 2, characterized in that: A second skirt (6) is formed on one side of the bushing (5), and the first skirt (34) abuts against the second skirt (6).

4. The socket connection interface of the armored metal-clad hose for gas appliances according to claim 1, characterized in that: The radial straight line of the first skirt (34) is at an angle α to the axis of the metal sleeve (3), and α is less than 90 degrees.

5. The socket connection interface of the armored metal-clad hose for gas appliances according to claim 1, characterized in that: A slot (7) is provided on the side surface of the plastic head (4), a throat clamp (8) is installed on the plastic head (4) and located at the slot (7), and ribs are provided on the inner wall of the slot (7).

6. The socket connection interface of the armored metal-clad hose for gas appliances according to claim 1, characterized in that: The surface of the double-buckle metal armored hose (2) is covered with a plastic protective layer.

7. The socket connection interface of the armored metal-clad hose for gas appliances according to claim 1, characterized in that: The tail of the plastic head (4) is sleeved with a clamping sleeve (9).

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