Quick-release pipe joint for pantograph control panel

Abstract

A quick-release pipe joint for a pantograph control panel relates to the technical field of pipe joints and comprises a taper hole joint assembly, a ball joint assembly and a connecting nut. The taper hole connector assembly is of a step structure, taper pipe threads are arranged on the outer diameter of the small head end of the taper hole connector assembly, and a first hexagonal hole is formed in the small head end. External threads are arranged on the outer diameter of the large-head end of the taper hole connector assembly, and a taper hole with the tip facing the first hexagonal hole is formed in the large-head end; one end of the ball joint assembly is communicated with an annular ball which can be correspondingly matched with the taper hole, a second hexagonal hole is formed in the annular ball, taper pipe threads are arranged on the outer diameter of the end, away from the annular ball, of the ball joint assembly, and an annular boss is arranged at the position, connected with the annular ball, of the ball joint assembly. The ball joint assembly is movably sleeved with a connecting nut, and an inner hole of the connecting nut is of a stepped hole structure. According to the pantograph control panel, sealing pieces such as rubber and plastic do not need to be used, and the overall structural layout of the pantograph control panel can be more compact.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe joints, in particular to a quick-release pipe joint for a pantograph control panel. Background Art

[0002] As is known, a pantograph is a device that collects current from one or more contact wires. The pantograph control panel provides stable, clean and dry compressed air for the pantograph, wherein a precision pressure regulating valve is used to adjust the stability of the contact pressure, a one-way throttle valve is used to control the time of raising and lowering the pantograph, an air filter is used to ensure the cleanliness and dryness of the air circuit, and a safety valve is used to protect the safety of the air circuit. The pneumatic components on the pantograph control panel are connected through pipe joints, which are channels for the circulation of compressed air and links connecting the pneumatic components. Since all pneumatic components need to be removed from the control panel when disassembling traditional straight-through standard pipe joints, the operation is complicated and easy to cause pipeline leakage, which is not convenient for the maintenance and replacement of the pneumatic components of the control panel; therefore, split pipe joints have appeared on the market, but the existing split pipe joints mostly rely on rubber or plastic seals to achieve sealing, and rubber or plastic seals are prone to leakage caused by aging;

[0003] A Chinese patent (publication number: CN104565604A) discloses a connection device in an explosion-proof device; the patent includes a first joint and a second joint, and a nut located between the first joint and the second joint; at least one copper sealing ring is provided at the connection between the first joint and the second joint and the nut; under external pressure, the seals of the two connectors can be tightly fitted, thereby ensuring the durability of the explosion-proof joint seal, avoiding the hard connection of metal and metal direct contact caused by aging and damage caused by the traditional use of only rubber sealing rings, which affects the sealing performance; but the outer diameters of the first joint and the second joint of the patent are both provided with an external hexagonal structure for installation, which extends the connection length; if applied to a pantograph control panel, a large distance will be between two adjacent pneumatic components, resulting in the overall layout of the pantograph control panel being not compact enough. Utility Model Content

[0004] In order to overcome the deficiencies in the background technology, the utility model discloses a quick-release pipe joint for a pantograph control panel.

[0005] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0006] A quick-release pipe joint for a pantograph control panel, comprising a tapered hole joint assembly, a ball joint assembly and a connecting nut; the tapered hole joint assembly is in a stepped structure, the outer diameter of its small head end is provided with a tapered pipe thread, and the small head end is provided with a first hexagonal hole; the outer diameter of the large head end of the tapered hole joint assembly is provided with an external thread, and the large head end is provided with a tapered hole with the tip facing the first hexagonal hole; one end of the ball joint assembly is connected with an annular ball head that can be matched with the tapered hole, and the annular ball head is provided with a second hexagonal hole, the outer diameter of the end of the ball joint assembly away from the annular ball head is provided with a tapered pipe thread, and the position where the ball joint assembly is connected to the annular ball head is provided with an annular boss; the outer movable sleeve of the ball joint assembly is provided with a connecting nut, the inner hole of the connecting nut is a stepped hole structure, the large diameter hole is provided with an internal thread that is matched with the external thread of the large head end of the tapered hole joint assembly, and the diameter of the small diameter hole of the connecting nut is smaller than the outer diameter of the annular boss.

[0007] Preferably, an annular clearance groove is provided at the connection position between the annular ball head and the ball joint assembly.

[0008] Preferably, the outer diameter of the connecting nut is a hexagonal structure.

[0009] Preferably, the connecting nut is provided with a threaded hole perpendicular to the axis of the connecting nut at one end corresponding to the large diameter hole thereof, and a top screw is threadedly connected to the inner thread of the threaded hole.

[0010] Preferably, a conical filter screen corresponding to the conical hole is provided in the conical hole.

[0011] Preferably, an annular oil storage groove is provided at one end of the annular boss away from the annular ball head.

[0012] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0013] The utility model discloses a quick-release pipe joint for a pantograph control panel, which has a simple structure and is easy to assemble. By screwing the connecting nut, the annular ball head is brought close to the tapered hole until the annular ball head and the tapered hole are in close contact with each other, so that the tapered hole joint component and the ball head joint component can be sealed and connected without using rubber, plastic or other sealing parts, thus avoiding leakage caused by aging of the sealing parts, and achieving reliable sealing and long service life.

[0014] Since the tapered hole joint assembly is installed by cooperating with the first hexagonal hole through a hexagonal wrench, and the ball joint assembly is installed by cooperating with the second hexagonal hole through a hexagonal wrench, the outer diameters of the tapered hole joint assembly and the ball joint assembly do not need to be provided with a hexagonal structure, thereby effectively shortening the length of the tapered hole joint assembly and the ball joint assembly, thereby shortening the distance between two adjacent connected pneumatic components of the pantograph control panel, thereby making the overall structural layout of the pantograph control panel more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the structure of a cone filter;

[0018] Figure 4 It is a structural schematic diagram of a threaded hole;

[0019] Figure 5 It is a structural schematic diagram of the annular oil storage tank.

[0020] In the figure: 1, tapered hole joint assembly; 2, ball head joint assembly; 3, connecting nut; 4, first hexagonal hole; 5, tapered hole; 6, annular ball head; 7, annular boss; 8, annular clearance groove; 9, threaded hole; 10, top screw; 11, conical filter; 12, annular oil storage tank; 13, second hexagonal hole. DETAILED DESCRIPTION

[0021] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0022] Embodiment 1, in combination with Figures 1 to 3 A quick-release pipe joint for a pantograph control panel, comprising a tapered hole joint assembly 1, a ball joint assembly 2 and a connecting nut 3; the tapered hole joint assembly 1 is a stepped structure, the outer diameter of the small head end thereof is provided with a tapered pipe thread, and the small head end is provided with a first hexagonal hole 4, that is, when in use, the tapered hole joint assembly 1 can be matched with the first hexagonal hole 4 by a hexagonal wrench to install the tapered hole joint assembly 1 at the interface of the corresponding pneumatic component of the pantograph control panel; the outer diameter of the large head end of the tapered hole joint assembly 1 is provided with an external thread, and the large head end is provided with a tapered hole 5 with the tip facing the first hexagonal hole 4;

[0023] One end of the ball joint assembly 2 is connected to an annular ball head 6 that can be matched with the tapered hole 5, and a second hexagonal hole 13 is provided in the annular ball head 6, that is, when in use, a hexagonal wrench can be used to cooperate with the second hexagonal hole 13 to install the ball joint assembly 2 on the interface of the corresponding pneumatic component of the pantograph control panel; the outer diameter of the end of the ball joint assembly 2 away from the annular ball head 6 is provided with a tapered pipe thread, and the position where the ball joint assembly 2 and the annular ball head 6 are connected is provided with an annular boss 7; the outer movable sleeve of the ball joint assembly 2 is provided with a connecting nut 3, the inner hole of the connecting nut 3 is a stepped hole structure, and its large diameter hole is provided with an external thread corresponding to the large end end of the tapered hole joint assembly 1. Internal thread, and the aperture of the small diameter hole of the connecting nut 3 is smaller than the outer diameter of the annular boss 7; that is, by screwing the connecting nut 3, the connecting nut 3 can pull the annular boss 7, and then the annular ball head 6 can be close to the tapered hole 5, until the annular ball head 6 and the tapered hole 5 are in close contact with each other, so that the tapered hole joint component 1 and the ball head joint component 2 can be sealed and connected without using rubber, plastic and other sealing parts, avoiding leakage caused by aging of the sealing parts, and the sealing is reliable and has a long service life; the outer diameter of the connecting nut 3 is a hexagonal structure, which can facilitate the operator to screw the connecting nut 3 to achieve the operation of connecting or disconnecting the tapered hole joint component 1 and the ball head joint component 2;

[0024] It should be noted that the small-diameter hole of the connecting nut 3 and the ball joint assembly 2 are correspondingly rotated and matched. When the connecting nut 3 is tightened, the connecting nut 3 is coaxial with the tapered hole joint assembly 1. The contact match between the inner cavity step surface of the connecting nut 3 and the annular boss 7 and the small-diameter hole of the connecting nut 3 and the ball joint assembly 2 form a guiding effect on the ball joint assembly 2, so that the annular ball head 6 can be aligned with the tapered hole 5 and remain coaxial with the tapered hole 5, so that the sealing performance can be effectively guaranteed after the annular ball head 6 and the tapered hole 5 are in close contact with each other.

[0025] It should be noted that the tapered hole joint assembly 1 is installed by cooperating with the first hexagonal hole 4 through a hexagonal wrench, and the ball joint assembly 2 is installed by cooperating with the second hexagonal hole 13 through a hexagonal wrench, so that the outer diameters of the tapered hole joint assembly 1 and the ball joint assembly 2 do not need to be provided with a hexagonal structure, thereby effectively shortening the length of the tapered hole joint assembly 1 and the ball joint assembly 2, thereby shortening the distance between two adjacent connected pneumatic components of the pantograph control panel, thereby making the overall structural layout of the pantograph control panel more compact;

[0026] It should be noted that before installing the ball joint assembly 2, a connecting nut 3 needs to be installed on the outer shell of the ball joint assembly 2;

[0027] In addition, an annular clearance groove 8 is provided at the connection position between the annular ball head 6 and the ball joint assembly 2, and the annular clearance groove 8 can prevent the end surface of the tapered hole 5 from conflicting with the annular boss 7, thereby affecting the corresponding conflict between the annular ball head 6 and the tapered hole 5, and avoiding failure to achieve sealing;

[0028] In order to prevent impurities from flowing between the pneumatic components of the pantograph control panel, a conical filter 11 corresponding to the conical hole 5 can be provided in the conical hole 5, as shown in the attached Figure 3 When the annular ball head 6 contacts the tapered hole 5, the annular ball head 6 can contact the tapered filter 11, so that the tapered filter 11 is in close contact with the tapered hole 5 to achieve the filtering function.

[0029] Embodiment 2: Although the above embodiment can realize the sealed connection between two adjacent pneumatic components of the pantograph control panel, it is found that the connecting nut 3 is accidentally loosened due to vibration or other factors during use, resulting in accidental failure of the seal between the annular ball head 6 and the tapered hole 5. To solve this technical problem, this embodiment is further improved;

[0030] Combined with Figure 4 , a quick-release pipe joint for a pantograph control panel, which is different from Example 1 in that, on the basis of Example 1, the connecting nut 3 is provided with a threaded hole 9 perpendicular to the axis of the connecting nut 3 at one end corresponding to its large-diameter hole, and the threaded hole 9 is internally threaded with a top screw 10, that is, when the annular ball head 6 is tightly in contact with the tapered hole 5 to achieve sealing, the top screw 10 can be screwed so that the top screw 10 is in contact with the large end of the tapered hole joint assembly 1, thereby preventing the connecting nut 3 from accidentally loosening, and further improving the reliability of the seal between the annular ball head 6 and the tapered hole 5; when it is necessary to disconnect the tapered hole joint assembly 1 and the ball head joint assembly 2, the top screw 10 can be loosened first, and then the connecting nut 3 can be screwed to disconnect the tapered hole joint assembly 1 and the ball head joint assembly 2.

[0031] Embodiment 3, when in use, it is found that when the connecting nut 3 is screwed to make the annular ball head 6 collide with the tapered hole 5, there is a large friction between the inner cavity step surface of the connecting nut 3 and the corresponding end surface of the annular boss 7, which makes it difficult to screw the connecting nut 3. When the connecting nut 3 is screwed, the screwing of the connecting nut 3 even drives the ball joint assembly 2 to rotate. In order to solve this technical problem, this embodiment is further improved;

[0032] Combined with Figure 4 A quick-release pipe joint for a pantograph control panel. Based on embodiment 1 or 2, an annular oil storage groove 12 is provided at the end of the annular boss 7 away from the annular ball head 6, and grease can be stored in the annular oil storage groove 12 to reduce the friction between the inner step surface of the connecting nut 3 and the corresponding end surface of the annular boss 7, thereby facilitating the connection operation between the tapered hole joint assembly 1 and the ball head joint assembly 2.

[0033] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A quick-release pipe joint for a pantograph control panel, characterized by: The invention comprises a tapered hole joint component (1), a ball joint component (2) and a connecting nut (3); the tapered hole joint component (1) is in a stepped structure, the small end of the tapered hole joint component (1) is provided with a tapered pipe thread on the outer diameter, and a first hexagonal hole (4) is provided inside the small end; the large end of the tapered hole joint component (1) is provided with an external thread on the outer diameter, and a tapered hole (5) with the tip facing the first hexagonal hole (4) is provided inside the large end; one end of the ball joint component (2) is connected to an annular ball head (6) that can be matched with the tapered hole (5), and the annular ball head (6) is provided with a first A hexagonal hole (13) is provided, the outer diameter of one end of the ball joint assembly (2) away from the annular ball head (6) is provided with a tapered pipe thread, and an annular boss (7) is provided at the position where the ball joint assembly (2) and the annular ball head (6) are connected; the outer sleeve of the ball joint assembly (2) is provided with a connecting nut (3), the inner hole of the connecting nut (3) is a stepped hole structure, the large diameter hole thereof is provided with an internal thread corresponding to the external thread of the large end of the tapered hole joint assembly (1), and the diameter of the small diameter hole of the connecting nut (3) is smaller than the outer diameter of the annular boss (7).

2. The quick-release pipe joint for a pantograph control panel according to claim 1, characterized in that: An annular clearance groove (8) is provided at the connection position between the annular ball head (6) and the ball head joint assembly (2).

3. The quick-release pipe joint for a pantograph control panel according to claim 1, characterized in that: The outer diameter of the connecting nut (3) is a hexagonal structure.

4. The quick-release pipe joint for a pantograph control panel according to claim 1 or 3, characterized in that: The connecting nut (3) is provided with a threaded hole (9) perpendicular to the axis of the connecting nut (3) at one end corresponding to the large diameter hole thereof, and a top screw (10) is connected to the internal thread of the threaded hole (9).

5. The quick-release pipe joint for a pantograph control panel according to claim 1, characterized in that: A conical filter screen (11) corresponding to the conical hole (5) is provided in the conical hole (5).

6. The quick-release pipe joint for a pantograph control panel according to claim 1, characterized in that: An annular oil storage groove (12) is provided at one end of the annular boss (7) facing away from the annular ball head (6).

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