Steel cylinder universal joint filling pipe

Abstract

The utility model discloses a steel cylinder universal joint filling pipe, which belongs to the technical field of steel cylinder filling, and comprises a rotating shaft, a copper pipe and an angle valve connecting piece, the rotating shaft is connected with the copper pipe and the angle valve connecting piece, the rotating shaft comprises a first connecting pipe, a second connecting pipe and a third connecting pipe, the first connecting pipe comprises a first connecting pipe and a second connecting pipe which are communicated with each other, the axes of the first connecting pipe and the second connecting pipe are not collinear, the second connecting pipe comprises a third connecting pipe and a fourth connecting pipe which are communicated with each other, and one end of the first connecting pipe is connected with the opening end of the third connecting pipe in a sleeving and relative rotating mode; a copper pipe connected with the third connecting pipe can rotate by any angle in the horizontal direction and the vertical direction, the situation that in the filling process, due to the fact that the bending stress of the copper pipe is too large, the end face is not tightly sealed, harmful gas is leaked, and even the copper pipe is damaged can be avoided, and the service life of the copper pipe is prolonged. Working efficiency is improved, and maintenance cost is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel cylinder filling, in particular to a steel cylinder universal joint filling tube. Background Art

[0002] Steel cylinders are steel cylinders for storing liquid chlorine, liquid ammonia, etc. Currently, copper pipes are usually used to fill steel cylinders. The upstream end of the copper pipe is connected to a needle valve for adjusting the input flow, and the downstream end of the copper pipe is connected to a hexagonal nut for connecting to the angle valve connecting rod of the steel cylinder through a threaded fit. A sealing gasket is arranged between the angle valve and the hexagonal nut, and a seal is formed by rotating and squeezing the steel cylinder angle valve and the sealing gasket using threaded rotation.

[0003] During the process of filling the steel cylinder, it is necessary to connect the angle valve connector to the angle valve, so that the copper tube, the angle valve and the cylinder cavity are connected to form a passage, and then open the valve stem of the angle valve installed at the opening of the steel cylinder, and then the steel cylinder can be filled. However, after the steel cylinder is filled and the next filling cycle is carried out, due to some differences in the parking direction of the steel cylinder during loading and unloading, it is necessary to rotate the angle valve connector according to the parking direction of the steel cylinder to align with the angle valve. During the process, the copper tube will rotate with the angle valve connector, and the bending stress at the bend of the copper tube is large, which is easy to cause damage to the copper tube during rotation, and the sealing gasket is easy to have gaps due to the bending of the pipeline, resulting in poor sealing, which causes the leakage of hazardous gases stored in the steel cylinder. The existing filling pipe cannot be rotated as needed and can only fill the steel cylinder in a single direction.

[0004] The patent document of Chinese patent application number 202320166250.7 discloses a universal connection device for a cylinder valve, comprising a movable joint core, a copper handwheel is provided on the left side of the movable joint core, a bent joint is provided on the right side of the movable joint core, one end of the movable joint core passes through the center hole of the copper handwheel and is stuck inside the copper handwheel, one end of the movable joint core is designed as a ball head and a sealing ring is provided on the head, the other end of the movable joint core is provided with a thread, threaded holes are provided inside both ends of the bent joint, the other end of the movable joint core is threadedly connected to one end of the bent joint, the inner mouth of the copper handwheel is provided with a thread, an movable connecting pipe is provided on the upper side of the bent joint, one end of the movable connecting pipe is provided with a thread and is threadedly connected to the other end of the bent joint, two sealing rings are provided on the other end of the movable connecting pipe, a high-pressure hose connecting joint is provided on the upper side of the movable connecting pipe, and the high-pressure hose connecting joint and the movable connecting pipe are connected by a universal joint nut.

[0005] The above patent is connected to a high-pressure hose at one end and a cylinder valve at the other end. A seal is formed between the head of the movable joint core and the 90-degree concave surface of the cylinder valve, thereby achieving a good sealing effect. By rotating the movable connecting pipe, the copper handwheel interface can be rotated in any direction of 360 degrees. However, this patent has only one rotatable position, and the high-pressure hose joint can only rotate on a horizontal plane, which is not suitable for situations that need to withstand greater stress. Utility Model Content

[0006] The problem to be solved by the utility model is the deficiency in the prior art. A universal joint filling tube for a steel cylinder is provided to solve the problem that during the circulation filling process of the steel cylinder, when the angle valve connector is rotated to align with the angle valve, the copper tube is easily damaged due to the large bending stress.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is: a universal joint filling pipe for a steel cylinder, comprising a rotating shaft, a copper pipe and an angle valve connector, wherein the copper pipe is connected to the angle valve connector through the rotating shaft, wherein the rotating shaft comprises a first connecting pipe, a second connecting pipe and a third connecting pipe, wherein the first connecting pipe comprises a first connecting pipe and a second connecting pipe which are interconnected, wherein the axes of the first connecting pipe and the second connecting pipe are not colinear, wherein the outer walls of the opening ends of the first connecting pipe and the second connecting pipe are both provided with a first spherical annular groove and a plurality of annular grooves, wherein the outer side of the first spherical annular groove is surrounded by a plurality of rolling balls, and a sealing ring is sleeved on the outer side of the annular groove;

[0008] The second connecting pipe comprises a third connecting pipe and a fourth connecting pipe which are interconnected, the axes of the third connecting pipe and the fourth connecting pipe are not colinear, the inner wall of the opening end of the third connecting pipe is provided with a second spherical annular groove, the opening end of the fourth connecting pipe is provided with a first thread structure, and the second connecting pipe can be threadedly connected with the copper pipe or the angle valve connecting piece through the first thread structure;

[0009] The inner wall of one end of the third connecting pipe is provided with a third spherical annular groove, and the other end is provided with a second thread structure. The third connecting pipe can be threadedly connected to the angle valve connector or the copper pipe through the second thread structure.

[0010] By adopting the above technical solution, the second connecting tube and the third connecting tube can rotate 360 ​​degrees relative to the first connecting tube, and the copper tube connected thereto can realize horizontal and vertical rotation.

[0011] As a further description of the above technical solution, one end of the first connecting pipe is sleeved with the open end of the third connecting pipe and is relatively rotatably connected, and the other end is sleeved with one end of the third connecting pipe provided with a third spherical annular groove and is relatively rotatably connected.

[0012] By adopting the above technical solution, the rotating shaft can rotate at two locations, so that one end of the rotating shaft can rotate in the horizontal direction and the other end can rotate in the vertical direction.

[0013] As a further description of the above technical solution, the first spherical annular groove is arranged opposite to the second spherical annular groove and the third spherical annular groove, and the rolling ball can roll in the space formed by the first spherical annular groove and the second spherical annular groove and the third spherical annular groove.

[0014] By adopting the above technical solution, the rolling ball enables the second connecting tube and the third connecting tube to rotate relative to the first connecting tube, and the rolling ball can clamp the second connecting tube and the third connecting tube to prevent them from falling off.

[0015] As a further description of the above technical solution, the sealing ring is interference fit with the annular groove.

[0016] By adopting the above technical solution, the sealing ring can achieve sealing and prevent oil and gas leakage during filling.

[0017] As a further description of the above technical solution, there are at least two annular grooves.

[0018] By adopting the above technical solution, a sealing ring is arranged outside the annular groove, and providing multiple sealing rings can improve the sealing effect.

[0019] As a further description of the above technical solution, the first thread structure and the second thread structure are internal threads or external threads.

[0020] By adopting the above technical solution, the two ends of the rotating shaft are connected to the angle valve connector and the copper pipe through a threaded structure.

[0021] As a further description of the above technical solution, the other end of the copper tube is connected to the filling equipment through a thread.

[0022] The angle valve connector can refer to the patents previously applied for by the applicant with application numbers 202223063722.0, 202322389604.7 and 202223063722.0.

[0023] The utility model has the following beneficial effects:

[0024] 1. In the utility model, by setting the rolling ball and the spherical annular groove, the second connecting tube and the third connecting tube can rotate 360 ​​degrees relative to the first connecting tube, and the axes of the first connecting tube and the second connecting tube are not collinear, and the axes of the third connecting tube and the fourth connecting tube are not collinear, so that the rotating axis can be rotated at any angle in the horizontal direction and the vertical direction. At the same time, it can avoid the leakage of harmful gases due to the poor sealing of the end face of the copper tube due to excessive bending stress, and even damage to the copper tube, so that the filling work cycle is more convenient.

[0025] 2. In the present invention, at least two sealing rings are provided at the connection points of the first connecting pipe, the second connecting pipe and the third connecting pipe, which can prevent oil and gas leakage during the filling process.

[0026] 3. In the present invention, in addition to installing a rotating shaft between the angle valve connector and the copper tube, a rotating shaft can also be installed in the middle of the copper tube, so that the copper tube can be adjusted more conveniently according to actual needs during filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0029] Figure 2 It is a schematic diagram of the exploded structure of an embodiment of the rotating shaft in the utility model;

[0030] Figure 3 It is a structural schematic diagram of an embodiment of the rotating shaft in the utility model;

[0031] Figure 4 It is a cross-sectional view of an embodiment of the rotating shaft in the utility model;

[0032] Figure 5 It is a cross-sectional view of an embodiment of the first connecting pipe of the rotating shaft in the utility model;

[0033] Figure 6 It is a cross-sectional view of an embodiment of the second connecting pipe of the rotating shaft in the utility model;

[0034] Figure 7 It is a cross-sectional view of an embodiment of the third connecting pipe of the rotating shaft in the utility model.

[0035] Among them, 1-rotating axis, 2-copper tube, 3-angle valve connector, 11-first connecting tube, 111-first connecting tube, 112-second connecting tube, 113-first spherical annular groove, 114-annular groove, 115-rolling ball, 116-sealing ring, 12-second connecting tube, 121-third connecting tube, 122-fourth connecting tube, 123-second spherical annular groove, 124-first threaded structure, 13-third connecting tube, 131-third spherical annular groove, 132-second threaded structure. DETAILED DESCRIPTION

[0036] The specific implementation methods of the present invention are further described in detail below in combination with the accompanying drawings. However, the following embodiments are only used to help understand the implementation of the present invention and cannot be understood as further limiting the present invention.

[0037] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions.

[0038] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present utility model, but should not be construed as limiting the present utility model.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In addition, 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, unless otherwise clearly defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Embodiment 1

[0043] Figure 1As shown, a universal joint filling tube for a steel cylinder includes a rotating shaft 1, a copper tube 2, and an angle valve connector 3. The copper tube 2 is connected to the angle valve connector 3 via the rotating shaft 1, and the copper tube 2 is connected to the filling device via a thread.

[0044] Figure 2-4 As shown, the rotating shaft 1 includes a first connecting pipe 11 , a second connecting pipe 12 and a third connecting pipe 13 .

[0045] Figure 2-5 As shown, the first connecting pipe 11 includes a first connecting pipe 111 and a second connecting pipe 112 which are interconnected. The axes of the first connecting pipe 111 and the second connecting pipe 112 are not colinear. The outer walls of the opening ends of the first connecting pipe 111 and the second connecting pipe 112 are both provided with a first spherical annular groove 113 and a plurality of annular grooves 114. The outer side of the first spherical annular groove 113 is surrounded by a plurality of rolling balls 115. The outer side of the annular groove 114 is surrounded by a sealing ring 116.

[0046] Figure 2-4 and Figure 6 As shown, the second connecting pipe 12 includes a third connecting pipe 121 and a fourth connecting pipe 122 which are interconnected, the axes of the third connecting pipe 121 and the fourth connecting pipe 122 are not colinear, the inner wall of the third connecting pipe 121 is provided with a second spherical annular groove 123, the open end of the third connecting pipe 121 is rotatably connected to one end of the first connecting pipe 11 and interconnected, the open end of the fourth connecting pipe 122 is provided with a first thread structure 124, and the second connecting pipe 12 can be threadedly connected to the angle valve connector 3 or the copper pipe 2 through the first thread structure 124;

[0047] Figure 2-4 and Figure 7 As shown, a third spherical annular groove 131 is provided on the inner wall of one end of the third connecting tube 13, and one end of the third connecting tube 13 provided with the third spherical annular groove 131 is rotatably connected to the first connecting tube 11 and interconnected, and a second threaded structure 132 is provided on the other end of the third connecting tube 13, and the third connecting tube 13 can be threadedly connected to the copper tube 2 or the angle valve connector 3 through the second threaded structure 132.

[0048] Figure 2 , 4 As shown, the sealing ring 116 is interference fit with the annular groove 114 , at least one of the second spherical annular groove 123 and the third spherical annular groove 131 is provided, and at least two of the annular grooves 114 are provided.

[0049] Figure 6As shown, the second spherical annular groove 123, the third spherical annular groove 131 are arranged opposite to the first spherical annular groove 113, and the rolling ball 115 can roll in the space formed by the first spherical annular groove 113 and the second spherical annular groove 123, and the third spherical annular groove 131, and the first thread structure 124 and the second thread structure 132 are internal threads or external threads.

[0050] Preferably, a thread sealing tape is used when the rotating shaft 1 is connected to the copper tube 2 or the angle valve connector 3 through the first thread structure 124 and the second thread structure 132 .

[0051] Preferably, a rotating shaft 1 is also installed in the middle of the copper tube 2, and the two ends of the copper tube 2 can achieve relative rotation through the rotating shaft 1.

[0052] Working principle: When using this filling pipe, first assemble the rotating shaft 1 with the copper tube 2 and the angle valve connector 3, use threaded sealing tape to wrap the external thread structure of the rotating shaft 1, copper tube 2 or the angle valve connector 3, tighten the thread structures at both ends of the copper tube 2, the angle valve connector 3 and the rotating shaft 1, open the angle valve of the cylinder, connect the angle valve connector 3 to the angle valve, and connect the other end of the copper tube 2 to the filling equipment through a threaded buckle to start filling. The oil and gas flow from one end of the copper tube 2 to the angle valve. When the filling is completed and the next cylinder is filled, the rotating shaft 1 can be rotated as needed. The copper tube 2 located downstream of the filling pipe will not leak harmful gases due to excessive bending stress resulting in poor end face sealing, or even damage the copper tube 2, thereby saving maintenance costs and improving the filling cycle efficiency.

Claims

1. A universal joint filling pipe for a steel cylinder, comprising a rotating shaft (1), a copper tube (2) and an angle valve connecting piece (3), wherein the copper tube (2) is connected to the angle valve connecting piece (3) via the rotating shaft (1), and characterized in that: The rotating shaft (1) comprises a first connecting tube (11), a second connecting tube (12) and a third connecting tube (13); the first connecting tube (11) comprises a first connecting tube (111) and a second connecting tube (112) which are interconnected; the axes of the first connecting tube (111) and the second connecting tube (112) are not colinear; the outer walls of the opening ends of the first connecting tube (111) and the second connecting tube (112) are both provided with a first spherical annular groove (113) and a plurality of annular grooves (114); the outer side of the first spherical annular groove (113) is surrounded by a plurality of rolling balls (115); the outer side of the annular groove (114) is surrounded by a sealing ring (116); The second connecting pipe (12) comprises a third connecting pipe (121) and a fourth connecting pipe (122) which are interconnected, the axes of the third connecting pipe (121) and the fourth connecting pipe (122) are not colinear, the inner wall of the opening end of the third connecting pipe (121) is provided with a second spherical annular groove (123), and the opening end of the fourth connecting pipe (122) is provided with a first thread structure (124), and the second connecting pipe (12) can be threadedly connected to the copper pipe (2) or the angle valve connecting piece (3) via the first thread structure (124); The inner wall of one end of the third connecting tube (13) is provided with a third spherical annular groove (131), and the other end is provided with a second thread structure (132). The third connecting tube (13) can be threadedly connected to the angle valve connecting piece (3) or the copper tube (2) via the second thread structure (132).

2. A universal joint filling tube for steel cylinders according to claim 1, characterized in that: One end of the first connecting pipe (11) is sleeved with the open end of the third connecting pipe (121) and is relatively rotatably connected, and the other end is sleeved with one end of the third connecting pipe (13) provided with the third spherical annular groove (131) and is relatively rotatably connected.

3. A universal joint filling tube for steel cylinders according to claim 1, characterized in that: The first spherical annular groove (113) is arranged opposite to the second spherical annular groove (123) and the third spherical annular groove (131), and the rolling ball (115) can roll in a space formed by the first spherical annular groove (113) and the second spherical annular groove (123) and the third spherical annular groove (131).

4. A universal joint filling tube for steel cylinders according to claim 1, characterized in that: The sealing ring (116) is interference fit with the annular groove (114).

5. A universal joint filling tube for steel cylinders according to claim 1, characterized in that: At least two annular grooves (114) are provided.

6. A universal joint filling tube for steel cylinders according to claim 1, characterized in that: The first thread structure (124) and the second thread structure (132) are internal threads or external threads.

Images