Reducing pipe with variable circle center

Abstract

The utility model belongs to the technical field of water supply and drainage pipelines, and particularly provides a circle-center-variable reducing pipe which comprises a large-diameter pipe, a small-diameter pipe and a limiting assembly. The axis of the large-diameter pipe is parallel to the axis of the small-diameter pipe; the large-diameter pipe is communicated with the small-diameter pipe through a variable-diameter connecting piece; the variable-diameter connecting piece is used for adjusting the distance between the axis of the large-diameter pipe and the axis of the small-diameter pipe; the limiting assembly is used for locking the distance between the axis of the large-diameter pipe and the axis of the small-diameter pipe. The reducing pipe with the variable circle center is simple in structure and convenient to operate, free conversion from the concentric reducing pipe to the eccentric reducing pipe can be achieved only through manual pushing and pulling, convenience and high efficiency are achieved, the requirements of different working conditions are met, the problem that the concentric reducing pipe and the eccentric reducing pipe cannot be used alternately is solved, and the working efficiency is improved. Meanwhile, a concentric pipe or an eccentric pipe does not need to be distinguished specially during engineering purchase, so that installation and purchase become simple and efficient.

Description

Technical Field

[0001] The utility model belongs to the technical field of water supply and drainage pipelines, and in particular relates to a pipe of a different diameter with a variable center. Background Art

[0002] In the fields of construction, chemical industry, metallurgy, machinery and other fields involving water supply and drainage, various pipes and pipe accessories are often used, such as reducers, elbows, tees, crosses, etc. Among them, reducers are divided into concentric reducers and eccentric reducers. The axes of the large and small diameters of concentric reducers coincide with the center of the circle, while the axes of the large and small diameters of eccentric reducers do not coincide. Reducers can easily change the pipe diameter on the one hand, and can also adjust the flow rate of the pipe on the other hand. They are pipe accessories that are used frequently in the field of water supply and drainage.

[0003] Since concentric reducers and eccentric reducers are frequently used in the process of pipeline installation, a large amount is used in a single project, but they cannot be used interchangeably. There is a high possibility of misuse or error by unskilled workers, and procurement is also very troublesome. Utility Model Content

[0004] The utility model aims to overcome the problems in the prior art that the concentric reducer and the eccentric reducer cannot be used alternately and are troublesome to install and purchase.

[0005] To this end, the utility model provides a reducer with a variable center, comprising a large diameter tube, a small diameter tube and a limit assembly; the axis of the large diameter tube is parallel to the axis of the small diameter tube; the large diameter tube is connected to the small diameter tube through a reducer; the reducer is used to adjust the distance between the axis of the large diameter tube and the axis of the small diameter tube; the limit assembly is used to lock the distance between the axis of the large diameter tube and the axis of the small diameter tube.

[0006] Specifically, the above-mentioned variable diameter connector includes a plastic tapered bellows; the large-diameter end of the plastic tapered bellows is connected to the large-diameter tube, and the small-diameter end is connected to the small-diameter tube.

[0007] Specifically, the above-mentioned plastic tapered bellows is a metal tapered bellows.

[0008] Specifically, the above-mentioned limit assembly includes a first limit member, a second limit member, and a connecting rod; the first limit member is installed on the outer wall of the end where the reducer is connected to the large diameter tube; the second limit member is installed on the outer wall of the end where the reducer is connected to the small diameter tube; one end of the connecting rod is rotatably connected to the first limit member, and the other end is slidably connected to the second limit member; the second limit member is provided with a locking member for fixing the relative position of the connecting rod and the second limit member.

[0009] Specifically, the locking member includes a nut; one end of the connecting rod is provided with a thread matching the nut; the second limiting member is provided with a sliding groove; one end of the connecting rod passes through the sliding groove and is connected to the nut.

[0010] Specifically, the first position-limiting member is provided with a ball socket; one end of the connecting rod is provided with a ball head matching the ball socket; the connecting rod is rotatably connected to the first position-limiting member through the ball head and the ball socket.

[0011] Specifically, one end of the connecting rod is rotatably connected to the first limiting member via a hinge.

[0012] Specifically, the first limiting member and the second limiting member are both annular structures, and are respectively sleeved on two ends of the variable diameter connector.

[0013] Specifically, the above-mentioned limiting assembly includes a plurality of connecting rods; the plurality of connecting rods are arranged at intervals along the circumferential direction on the periphery of the reducing connector.

[0014] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0015] The reducer with a variable center point provided by the utility model has a simple structure and is easy to operate. Free conversion from a concentric reducer to an eccentric reducer can be achieved by manual pushing and pulling, which is convenient and efficient, thereby adapting to different working conditions and solving the problem that concentric reducers and eccentric reducers cannot be used alternately, as well as the problem of misuse and wrong use of reducers by unskilled workers when installing them. At the same time, there is no need to distinguish between concentric reducers and eccentric reducers during engineering procurement, thereby making installation and procurement simple and efficient.

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the variable center diameter pipe provided by the utility model when it is in a concentric state.

[0018] Figure 2 It is a schematic diagram of a reducer with a variable center provided by the utility model in an eccentric state.

[0019] Figure 3 It is a schematic diagram of the second limiter and the connecting end of the connecting rod of the reducer with a variable center of circle provided by the utility model.

[0020] Figure 4 It is a schematic diagram of the first limiter and the connecting end of the connecting rod of the reducer with a variable center of circle provided by the utility model.

[0021] Explanation of the reference numerals: 1. large diameter tube; 2. small diameter tube; 3. reducing connector; 4. first position-limiting member; 401. ball socket; 5. connecting rod; 501. ball head; 6. second position-limiting member; 601. slide groove; 7. locking member. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0025] Reference Figure 1-2 The utility model provides a reducer with a variable center, comprising a large diameter tube 1, a small diameter tube 2 and a limit assembly; the axis of the large diameter tube 1 is parallel to the axis of the small diameter tube 2; the large diameter tube 1 is connected to the small diameter tube 2 through a reducer 3; the reducer 3 is used to adjust the distance between the axis of the large diameter tube 1 and the axis of the small diameter tube 2; the limit assembly is used to lock the distance between the axis of the large diameter tube 1 and the axis of the small diameter tube 2. The initial state of the variable center reducer is preferably a state in which the center of the circle is concentric and the axes of the large and small tubes are collinear. When in use, the distance between the axis of the large diameter tube 1 and the axis of the small diameter tube 2 is adjusted by the reducer 3 so that the axes of the two coincide or deviate, and then the relative position of the axis of the large diameter tube 1 and the axis of the small diameter tube 2 is locked by the limit assembly, and the distance between the two axes is fixed, so as to realize the use requirements of concentric reducers or eccentric reducers.

[0026] Specifically, the reducer 3 includes a plastic tapered bellows; the large-diameter end of the plastic tapered bellows is connected to the large-diameter tube 1, and the small-diameter end is connected to the small-diameter tube 2. The diameters of both ends of the plastic tapered bellows match the diameters of the large-diameter tube 1 and the small-diameter tube 2. In combination with the plasticity of the plastic tapered bellows, the center of the plastic tapered bellows can be freely changed by pushing and pulling with external force, thereby changing the axis positions of the large-diameter tube 1 and the small-diameter tube 2 connected at both ends. When the demand is for an eccentric reducer shape, such as Figure 2 As shown, the plastic tapered bellows is pushed, using its good expansion and contraction compensation performance and plasticity, until the single-side pipe wall of the plastic tapered bellows is in line with the single-side pipe wall of the large-diameter pipe 1 and the small-diameter pipe 2, forming a stable eccentric pipe structure. Then, the limit assembly is adjusted to lock the plastic tapered bellows in this form.

[0027] The plastic tapered bellows is preferably a metal tapered bellows, the external corrugated structure of which has the function of elongation and compression compensation. The center of the pipe can be freely changed by pushing and pulling with external force. Combined with the plasticity of the metal material, the stability of the shape change of the reducer can be enhanced.

[0028] The number of plastic tapered bellows between the large diameter pipe 1 and the small diameter pipe 2 is designed according to the actual situation. When the diameter difference between the large diameter pipe 1 and the small diameter pipe 2 is large, that is, a large diameter change range is required, in order to increase the stability of the water flow in the pipeline and reduce the head loss, multiple sections of plastic tapered bellows can be used to improve the smoothness of the water flow. When the diameter difference between the large diameter pipe 1 and the small diameter pipe 2 is small, that is, a small diameter change range is required, only one section of plastic tapered bellows can be used to connect the large diameter pipe and the small diameter pipe 2, so as to simplify the reducer components.

[0029] In a detailed embodiment, the limit assembly includes a first limit member 4, a second limit member 6, and a connecting rod 5; the first limit member 4 is installed on the outer wall of the end of the reducer 3 connected to the large diameter tube 1; the second limit member 6 is installed on the outer wall of the end of the reducer 3 connected to the small diameter tube 2; one end of the connecting rod 5 is rotatably connected to the first limit member 4, and the other end is slidably connected to the second limit member 6; the second limit member 6 is provided with a locking member 7 for fixing the relative position of the connecting rod 5 and the second limit member 6. Before use, release the locking member 7 to allow one end of the connecting rod 5 to slide freely on the second limit member 6. Figure 1-2 When the reducer 3 is adjusted to the desired position, the connecting rod 5 is rotated to a position parallel to the corresponding side wall of the reducer 3, and the connecting rod 5 is fixed by the locking member 7 to limit the end of the connecting rod 5 from sliding on the second limit member 6, so that the connecting rod 5 is maintained in a position parallel to the corresponding side wall of the reducer 3. The anti-deformation ability of the reducer 3 is improved through the anchoring effect of the limit assembly.

[0030] Optionally, the locking member 7 includes a nut; one end of the connecting rod 5 is provided with a thread matching the nut; the second stopper 6 is provided with a slide groove 601; one end of the connecting rod 5 passes through the slide groove 601 and is connected to the nut. Before use, the connection between the nut and the connecting rod 5 is released so that the end of the connecting rod 5 can slide in the slide groove 601. When the connecting rod 5 is adjusted to a suitable position, the nut is tightened to fix the end of the connecting rod 5 on the second stopper 6. The extension line of the slide groove 601 in the length direction preferably passes through the center of the cross section of the reducer 3.

[0031] Specifically, a ball socket 401 is provided on the first position-limiting member 4 ; a ball head 501 matching the ball socket 401 is provided at one end of the connecting rod 5 ; the connecting rod 5 is rotatably connected to the first position-limiting member 4 via the ball head 501 and the ball socket 401 .

[0032] Optionally, one end of the connecting rod 5 is rotatably connected to the first stopper 4 via a hinge. The hinge installation direction is determined according to the rotation direction required during use. Other feasible rotation connection structures can also be used between the first stopper 4 and the connecting rod 5, which are not limited thereto.

[0033] In order to further improve the deformation resistance, such as Figure 3-4 The first limiting member 4 and the second limiting member 6 are both annular structures, respectively sleeved at both ends of the reducing connector 3. The limiting assembly includes a plurality of connecting rods 5; the plurality of connecting rods 5 are arranged at intervals along the circumferential direction on the periphery of the reducing connector 3. The reducing connector 3 is limited from multiple directions.

[0034] In another embodiment, the first stopper 4 is detachably mounted on the outer diameter of the end of the large diameter tube 1 connected to the reducer 3, and the second stopper 6 is detachably mounted on the outer diameter of the end of the small diameter tube 2 connected to the reducer 3. After the large diameter tube 1, the reducer 3 and the small diameter tube 2 are adjusted to the desired eccentric or concentric state, the first stopper 4 and the second stopper 6 are respectively mounted on the large diameter tube 1 and the small diameter tube 2, and the connecting rod 5 is adjusted to lock the reducer 3 in the current state, that is, the position of the axis of the large diameter tube 1 and the axis of the small diameter tube 2 are locked to maintain the eccentric or concentric state.

[0035] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. All designs that are identical or similar to the present invention fall within the protection scope of the present invention.

Claims

1. A reducer with a variable center, characterized in that: The invention comprises a large diameter tube (1), a small diameter tube (2) and a stop assembly; the axis of the large diameter tube (1) is parallel to the axis of the small diameter tube (2); the large diameter tube (1) and the small diameter tube (2) are connected via a reducer (3); the reducer (3) is used to adjust the distance between the axis of the large diameter tube (1) and the axis of the small diameter tube (2); and the stop assembly is used to lock the distance between the axis of the large diameter tube (1) and the axis of the small diameter tube (2).

2. The variable center reducer as claimed in claim 1, characterized in that: The diameter-changing connector (3) comprises a plastic tapered bellows; the large-diameter end of the plastic tapered bellows is connected to the large-diameter tube (1), and the small-diameter end is connected to the small-diameter tube (2).

3. The variable center reducer as claimed in claim 2, characterized in that: The plastic tapered bellows is a metal tapered bellows.

4. The variable center diameter reducer as claimed in claim 1, characterized in that: The limiting assembly comprises a first limiting member (4), a second limiting member (6), and a connecting rod (5); the first limiting member (4) is mounted on the outer wall of the end of the reducing connecting member (3) connected to the large diameter tube (1); the second limiting member (6) is mounted on the outer wall of the end of the reducing connecting member (3) connected to the small diameter tube (2); one end of the connecting rod (5) is rotatably connected to the first limiting member (4), and the other end is slidably connected to the second limiting member (6); the second limiting member (6) is provided with a locking member (7) for fixing the relative position of the connecting rod (5) and the second limiting member (6).

5. The variable center diameter reducer as claimed in claim 4, characterized in that: The locking member (7) comprises a nut; one end of the connecting rod (5) is provided with a thread matching the nut; the second limiting member (6) is provided with a sliding groove (601); one end of the connecting rod (5) passes through the sliding groove (601) and is connected to the nut.

6. The variable center diameter reducer as claimed in claim 4, characterized in that: The first position-limiting member (4) is provided with a ball socket (401); one end of the connecting rod (5) is provided with a ball head (501) matching the ball socket (401); the connecting rod (5) is rotatably connected to the first position-limiting member (4) via the ball head (501) and the ball socket (401).

7. The variable center diameter reducer as claimed in claim 4, characterized in that: One end of the connecting rod (5) is rotatably connected to the first limiting member (4) via a hinge.

8. The variable center reducer as claimed in claim 4, characterized in that: The first limiting member (4) and the second limiting member (6) are both annular structures and are respectively sleeved on two ends of the reducing connector (3).

9. The variable center reducer as claimed in claim 8, characterized in that: The limiting assembly comprises a plurality of connecting rods (5); the plurality of connecting rods (5) are arranged at intervals along the circumferential direction on the periphery of the reducing connecting piece (3).

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