A kind of angle plug door and its processing method

Abstract

The present invention discloses a folded angle plug gate, which is composed of a plug gate body, a plug gate cover on one side of the plug gate body, a valve core arranged in the plug gate body, a valve stem fixedly connected to the valve core, and a handle fixedly connected to the valve stem; the plug gate body and the plug gate cover are fastened and connected by bolt connectors; a marking layer or a through hole is arranged on the outer surface of the plug gate body to indicate the position of the starting point of the thread in the plug gate body. The present invention also discloses a processing technology of the folded angle plug gate, which comprises machining holes and flange surfaces of a stainless steel plug gate cover blank, and then drilling and tapping; drilling and tapping a stainless steel plug gate body blank; placing the valve core in the plug gate body, fastening the valve stem to the valve core, and then fastening the valve stem to the handle; fastening the plug gate cover to the plug gate body by bolt connectors to form the folded angle plug gate. The present invention can not only play the role of prompting the position of the starting point of the thread in the plug gate body, allowing workers to use it as a reference during installation to avoid improper installation, but also can promptly draw the attention of train inspection personnel to the folded angle plug gate closed due to a fault.

Description

Technical Field

[0001] The invention relates to a folded angle plug door and a processing method thereof. Background Art

[0002] The train brakes with compressed air, which is provided by the air compressor of the locomotive and transmitted to each car through the train main pipe. Each car has a switch of the train main pipe, which is professionally called "angle plug door". Only when the angle plug door is opened can the compressed air be transmitted to the car, and then to the last car in turn to ensure the smooth flow of the train main pipe. The angle plug door is a control valve for connecting and cutting off the air between railway locomotives, locomotives and vehicles, and vehicles and vehicles. After the handle is lifted, it can be rotated 90° to open and close the air path. The angle plug door is a key component installed in the vehicle braking system. The angle plug door is generally installed at both ends of the vehicle, and 500-600kPa of compressed air is passed inside to transmit the braking and relief signals from the locomotive.

[0003] The existing trains often have the angled plug door fall out of the connecting pipe, causing the train to stop, run in sections, and be thrown off. The main reasons are: the design of the connection between the ball-shaped angled plug door and the connecting pipe (auxiliary pipe) is unreasonable. The main reasons are: 1. The connecting pipe (auxiliary pipe) touches the threaded part only after inserting 62mm into the sealing sleeve, and the operator is not clear how much the thread of the connecting pipe (auxiliary pipe) enters the thread of the angled plug door. 2. The concentricity of the plug door cover and the plug door body, the spherical valve core and the upper groove of the plug door body is not good. Forced extrusion during installation causes the plug door body and the O-ring to be separated in the valve. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects existing in the prior art and to provide a corner plug door, in which the position of the starting point of the internal thread is set at a conspicuous position of the plug door body for workers to use as a reference during installation to avoid improper installation; to avoid the problem that the connecting pipe (auxiliary pipe) only contacts the threaded part after being inserted into the sealing sleeve 62mm, and the operator is not clear about how much the thread of the connecting pipe (auxiliary pipe) enters the thread of the corner plug door.

[0005] To achieve the above purpose, the technical solution of the present invention is to design an angled plug gate, which is composed of a plug gate body, a plug gate cover on one side of the plug gate body, a valve core arranged in the plug gate body, a valve stem fixedly connected to the valve core, and a handle fixedly connected to the valve stem;

[0006] The handle is located outside the plug gate and above the plug gate body; the plug gate body and plug gate cover are fastened by bolt connectors; a marking layer or through hole is set on the outer surface of the plug gate body to indicate the position of the starting point of the thread in the plug gate body. The position of the starting point of the internal thread (marking layer or through hole) is set at a conspicuous position of the plug gate body for workers to refer to during installation to avoid improper installation; to avoid the problem that the connecting pipe (auxiliary pipe) does not touch the thread part until it is inserted into the sealing sleeve 62mm, and the operator is not clear about how much the connecting pipe (auxiliary pipe) thread enters the angle plug gate thread.

[0007] A further technical solution is that a through hole is provided on the outer surface of the plug body; the valve core is in a hollow spherical shape for weight reduction; the valve hole on the valve core is provided horizontally through the valve core;

[0008] An opening is provided on the valve core, the opening is higher than the valve hole, and the rotation axis of the opening is set at an angle with the rotation axis of the valve hole; the through hole on the plug body is connected to the opening through a connecting channel in the plug body wall and a connecting channel in the valve core wall. The lower pipe end of the through hole of the plug body, that is, the part of the angled plug body, is used to connect with the connecting pipe; the middle part of the valve core is hollowed out to reduce weight; the opening height is higher than the valve hole, and in the top view, the opening position is located at a 30° counterclockwise angle of the valve hole compared with the valve hole position (or if the valve hole is regarded as the 12 o'clock direction, the opening is located at about 10 o'clock); the size of the channel opening of the connecting channel in the valve core wall located on the outer wall of the valve core is larger than the aperture of the connecting hole in the plug body wall. When the angled plug body is closed due to a malfunction, the high-pressure gas is discharged through the opening, the connecting channel, the connecting hole, and finally through the through hole. Even if the handle is not in the standard position when closed (that is, the valve core is not exactly perpendicular to the airflow direction), the high-pressure gas can still be discharged because the size of the channel opening of the connecting channel in the valve core wall located on the outer wall of the valve core is larger than the aperture of the connecting hole in the plug body wall. When the angle plug gate is not closed, that is, in the open state, since the connecting channel is arranged in the valve core wall and the valve core is positioned so that the valve hole is parallel to the airflow direction, the gas cannot pass through the opening, the connecting channel, the connecting hole, and finally be discharged through the through hole (no connected airflow channel is formed).

[0009] A further technical solution is that the connecting channel is a constant diameter channel; the aperture of the opening is consistent with the aperture of the connecting channel; the aperture of the through hole is smaller than the aperture of the opening. This arrangement allows the high pressure gas to still have a high pressure when it is discharged so as to form a whistle to alert the train inspection personnel.

[0010] A further technical solution is that the bolt connector includes a bolt, a nut matched with the bolt and an inner ring locking washer; the opposite ends of the plug body are provided with npt3 / 4 pipe threads to achieve connection with the train main pipe or connecting pipe.

[0011] The present invention also provides a technical solution, which is a process method for processing an angle plug door, comprising the following process steps performed in sequence:

[0012] S1: Turn the hole and flange surface of the stainless steel plug cover blank, then drill and tap to produce npt3 / 4 pipe thread; remove burrs;

[0013] S2: drilling a hole in the cast stainless steel plug body blank to form a sealing sleeve step on the inner wall of the plug body pipe opening;

[0014] A cylinder with the same height as the drill bit is fixedly arranged on the base of the drilling equipment, and a distance is set between the cylinder and the drill bit to avoid motion interference in drilling; a labeling device or a punching device is fixedly arranged on the cylinder to indicate the position of the thread starting point in the plug door body;

[0015] After drilling, tapping is performed to produce threads located further inside the sealing sleeve step;

[0016] S3: Place the valve core in the gate body, fasten the valve stem to the valve core, and then fasten the valve stem to the handle; fasten the gate cover to the gate body through a bolt connector to form the angled gate. The gate body can also be cast with forged cast iron; a punching device is fixed on the cylinder to punch holes in the gate body; when the angled gate is closed due to a fault, the high-pressure gas in the angled gate is discharged through the through hole, and a whistle is formed at the same time to attract the attention of the train inspection personnel, so as to timely find the angled gate closed due to a fault; after such a setting, the hole punched in the gate body can not only serve to remind the position of the starting point of the thread in the gate body, so that the worker can use it as a reference during installation to avoid improper installation, but also can timely attract the attention of the train inspection personnel to the angled gate closed due to a fault (and it is well known to those in the field: the angled gate on the train tube of the locomotive vehicle has a simple structure and high reliability, but has the disadvantage of not being able to self-lock in the open state, which often causes the accident of the angled gate closing. The biggest taboo of train running is the closing of the angled gate, which can cause major accidents). The drilling equipment can be a drilling machine of the prior art, or a simple mechanism such as a reduction motor fixedly mounted on a base, a drill chuck fixedly mounted on the output shaft of the reduction motor, and a drill bit that can be removed and installed on the drill chuck. It is only necessary to drill a hole of the required size on the plug body blank. The labeling equipment can be a labeling machine of the prior art, or a simple mechanism such as a cylinder fixedly mounted on a cylinder, a negative pressure suction head mounted on the exposed end of the piston rod of the cylinder, the negative pressure pump of the negative pressure suction head is started before starting work, and the front of the identification layer with adhesive on the back is facing the negative pressure suction head, and then the cylinder is started to achieve the effect of affixing the identification layer to the outer surface of the plug body. It is only necessary to affix the identification layer to the plug body after drilling. The punching equipment can adopt a structure similar to the aforementioned drilling equipment, and adopt a simple mechanism such as a reduction motor fixedly mounted on the end face of the cylinder, a drill chuck fixedly mounted on the output shaft of the reduction motor, and a drill bit that can be removed and installed on the drill chuck. The rotation axis of the piston rod of the cylinder and the output shaft of the reduction motor (here refers to the reduction motor in the punching equipment) are perpendicular to the rotation axis of the plug body pipe mouth, so as to ensure that the position of the identification layer or the position of the punched hole accurately indicates the starting point of the internal thread.

[0017] The advantages and beneficial effects of the present invention are as follows: the position of the starting point of the inner thread is set at a conspicuous position of the plug body (marking layer or through hole) for workers to use as a reference during installation to avoid improper installation; and the problem that the connecting pipe (auxiliary pipe) does not contact the threaded part until it is inserted into the sealing sleeve 62mm, and the operator is not clear about how much the connecting pipe (auxiliary pipe) thread enters the angle plug thread.

[0018] When the angled plug is closed due to a fault, the high-pressure gas is discharged through the opening, the connecting channel, the connecting hole, and finally through the through hole. Even if the handle is not in the standard position when closed (that is, the valve core is not exactly perpendicular to the airflow direction), the high-pressure gas can still be discharged because the size of the channel opening of the connecting channel in the valve core wall located on the outer wall of the valve core is larger than the aperture of the connecting hole in the plug body wall. When the angled plug is not closed, that is, in the open state, because the connecting channel is set in the valve core wall, and the valve core is in a position where the valve hole is parallel to the airflow direction, the gas cannot pass through the opening, the connecting channel, the connecting hole, and finally be discharged through the through hole (no connected airflow channel is formed).

[0019] The connecting channel is a constant diameter channel; the aperture of the opening is consistent with the aperture of the connecting channel; the aperture of the through hole is smaller than the aperture of the opening. This arrangement allows the high pressure gas to still have a high pressure when it is discharged so as to form a whistle to alert the train inspection personnel.

[0020] A punching device is fixedly arranged on the cylinder for punching holes in the gate body; when the angle gate is closed due to a fault, the high-pressure gas in the angle gate is discharged through the through hole, and a whistling sound is formed at the same time to attract the attention of train inspection personnel, so as to promptly find the angle gate closed due to a fault; after such arrangement, the hole punched in the gate body can not only serve to remind the worker of the position of the starting point of the thread in the gate body, so that the worker can use it as a reference during installation to avoid improper installation, but also promptly draw the attention of the train inspection personnel to the angle gate closed due to a fault (people in this field are familiar with: the angle gate on the train tube of the locomotive vehicle has a simple structure and high reliability, but has the disadvantage of not being able to self-lock in the open state, which often causes accidents in which the angle gate is closed. The biggest taboo in train running is the closing of the angle gate, which can cause major accidents). BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a first embodiment of a corner plug door of the present invention;

[0022] Figure 2 yes Figure 1 A top view of

[0023] Figure 3 yes Figure 2 Schematic diagram of the middle plug door body and valve core;

[0024] Figure 4 yes Figure 1 Schematic diagram after shutdown due to fault;

[0025] Figure 5 yes Figure 4 Top view of the middle plug door body and valve core;

[0026] Figure 6 yes Figure 4 Schematic diagram of the valve core part;

[0027] Figure 7 is a schematic diagram of a state in which a drilling device according to a second embodiment of the present invention starts drilling;

[0028] Figure 8 yes Figure 7 Schematic diagram of the state after the drilling is completed;

[0029] Fig. 9 yes Figure 8 An enlarged schematic diagram of the drilling equipment;

[0030] Fig.10 yes Fig. 9 Side view of

[0031] Fig.11 It is a top view of a valve core and a plug door body provided with two groups of openings and connecting channels according to the first embodiment of the present invention;

[0032] Fig.12 yes Fig.11 Schematic diagram of the state where the angle plug door is closed;

[0033] Fig.13 is a schematic diagram of Embodiment 3 of the present invention;

[0034] Fig.14 yes Fig.13 Enlarged schematic diagram of the oval part in the figure.

[0035] In the figure: 1. plug door body; 2. plug door cover; 3. valve core; 4. valve stem; 5. handle; 6. through hole; 7. internal thread; 8. valve hole; 9. opening; 10. connecting channel; 11. connecting channel; 12. bolt; 13. nut; 14. inner ring locking washer; 15. npt3 / 4 pipe thread; 16. sealing sleeve; 17. base; 18. reduction motor; 19. drill chuck; 20. pulley mechanism; 21. cylinder; 22. drill bit; 23. inner sealing stuffing box; 24. outer sealing stuffing box; 25. annular air bag; 26. ventilation pipe; 27. air pump; 28. DETAILED DESCRIPTION

[0036] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0037] Embodiment 1: Figures 1 to 6As shown, the present invention is a folded angle plug, which is composed of a plug body 1, a plug cover 2 on one side of the plug body 1, a valve core 3 arranged in the plug body 1, a valve stem 4 fixedly connected to the valve core 3, and a handle 5 fixedly connected to the valve stem 4; the handle 5 is located outside the plug body 1 and above the plug body 1; the plug body 1 and the plug cover 2 are fastened by bolt connectors; a through hole 6 is arranged on the outer surface of the plug body 1 to indicate the position of the starting point of the thread 7 in the plug body 1. The valve core 3 is hollow spherical for weight reduction; the valve hole 8 on the valve core 3 is arranged horizontally through the valve core 3; an opening 9 is arranged on the valve core 3, the opening 9 is higher than the valve hole 8, and the rotation axis of the opening 9 is arranged at an angle with the rotation axis of the valve hole 8; the through hole 6 on the plug body 1 is connected with the opening 9 through a connecting channel 10 in the wall of the plug body 1 and a connecting channel 11 in the wall of the valve core 3. The connecting channel 10 is a constant diameter channel; the aperture of the opening 9 is consistent with the aperture of the connecting channel 10; the aperture of the through hole 6 is smaller than the aperture of the opening 9. The bolt connector includes a bolt 12, a nut 13 matched with the bolt 12, and an inner ring locking washer 14; the opposite ends of the plug body 1 are provided with npt3 / 4 pipe threads 15 (one side of the npt3 / 4 pipe threads 15 is also the inner thread 7) to achieve connection with the train main pipe or the connecting pipe.

[0038] Here’s how it works:

[0039] Turn the handle, when the length direction of the handle is consistent with the length direction of the angle plug tube (that is, consistent with the direction of airflow), the angle plug is in the open state, and the valve hole 8 in the valve core 3 connects the plug body 1 with the tube cavity of the plug cover 2, while at this time the through hole 6, the connecting channel 10, the connecting channel 11 and the opening 9 are not connected; when the angle plug is closed due to a fault, the valve hole 8 in the valve core 3 is basically perpendicular to the airflow direction, so the plug body 1 and the tube cavity of the plug cover 2 are not connected, while at this time the through hole 6, the connecting channel 10, the connecting channel 11 are connected with the opening 9, and the high-pressure gas is discharged from the through hole 6, causing howling.

[0040] In addition, this embodiment can also add a centrally symmetrical channel combination (that is, another channel combination, which is also composed of openings 9 and connecting channels 11) (such as Fig.11 , Fig.12 As shown), the angle plug gate is closed due to a fault. Regardless of whether the valve core rotates clockwise or counterclockwise to cause the angle plug gate to close, a connecting channel can be formed to discharge the high-pressure gas and cause howling.

[0041] Embodiment 2: The difference from Embodiment 1 is that Figures 7 to 10 As shown ( Figure 8 , Fig. 9 The middle dashed line shows that the drill tip of the drill bit on the drilling device and the rotation axis of the drill bit on the punching device are located in the same plane; for ease of illustration, Fig.10The punching device is not shown in the figure), and the process method for processing the angle plug door is composed of the following process steps performed in sequence:

[0042] S1: Turn the hole and flange surface of the stainless steel plug cover blank, then drill and tap to produce npt3 / 4 pipe thread; remove burrs;

[0043] S2: drilling a hole in the cast stainless steel plug body blank to form a sealing sleeve step on the inner wall of the plug body pipe opening (for installing the sealing sleeve);

[0044] A cylinder 21 is slidably arranged on the base 17 of the drilling device (to be precise, the cylinder is not at the same height as the drill bit, but when the base is arranged horizontally, the punching part of the punching device on the cylinder is at the same height as the drill bit), and a distance is set between the cylinder and the drill bit to avoid motion interference in drilling; a punching device is fixedly arranged on the cylinder to indicate the position of the starting point of the thread in the plug body;

[0045] After drilling, tapping is performed to produce threads located further inside the sealing sleeve step;

[0046] S3: placing the valve core in the plug gate body, fastening the valve stem to the valve core and then fastening the valve stem to the handle; fastening the plug gate cover to the plug gate body through a bolt connector to form the angled plug gate.

[0047] The drilling equipment adopts a simple drill mechanism such as a reduction motor 18 fixedly mounted on a base 17, a drill chuck 19 fixedly mounted on the output shaft of the reduction motor 18 (or as shown in the figure, a reduction motor drives a pulley mechanism to operate, and the pulley mechanism 20 drives the drill chuck 19 to rotate), and a drill bit 22 is detachably mounted on the drill chuck. It is only necessary to drill a hole of the required size on the plug body blank. The punching equipment can adopt a structure similar to the aforementioned drilling equipment, and adopt a simple mechanism such as a reduction motor fixedly mounted on the end face of a cylinder, a drill chuck fixedly mounted on the output shaft of the reduction motor, and a drill bit detachably mounted on the drill chuck. The rotation axis of the output shaft of the reduction motor in the punching equipment is perpendicular to the rotation axis of the plug body pipe mouth, so as to ensure that the position of the punched hole can accurately represent the starting position of the internal thread. The drill tip of the drill bit on the drilling device and the rotation axis of the drill bit on the punching device are located on the same plane (this plane is arranged parallel to the base), so that it can be ensured that after the drilling is completed, that is, the sealing sleeve step is formed on the inner wall of the plug body pipe opening, the punching device is used to punch a hole immediately to indicate the starting position of the inner thread (that is, the end position of the sealing sleeve step on the inner wall of the plug body pipe opening);

[0048] After the gate body is clamped by the tooling, the base is held (or a slide rail is set parallel to the rotation axis of the gate body pipe mouth, and the drilling equipment is driven to step toward the gate body pipe mouth by a mechanism slidably set on the slide rail) and stepped toward the gate body pipe mouth to drill a hole in the cast stainless steel gate body blank to form a sealing sleeve step on the inner wall of the gate body pipe mouth (for installing the sealing sleeve); after drilling, the position of the base 17 is maintained, and then the drilling equipment is started, and the cylinder is moved toward the gate body until a through hole is punched in the gate body; in order to facilitate the control of the depth of the through hole, a limit block can also be fixed on the side of the base or the drill chuck.

[0049] Embodiment 3: The difference from Embodiment 1 is that Fig.13 , 14 As shown, a group of sealing stuffing boxes are respectively arranged at the top and bottom of the valve core 3. A group of sealing stuffing boxes includes two sealing stuffing boxes, namely an inner sealing stuffing box 23 and an outer sealing stuffing box 24. An annular air bag 25 is arranged between the inner sealing stuffing box and the outer sealing stuffing box, so that the problem of insufficient concentricity between the valve core 3 and the plug body 1 can be corrected, ensuring good sealing and avoiding leakage of the angled plug (it is well known to those skilled in the art that the quality problems of the angled plug are also poor sealing and serious leakage. The reasons are as follows: 1. The raised part of the sealing seat does not match the groove of the upper cover, or the groove size is too small, and the assembly is not smooth, so that the sealing seat is abnormally squeezed and presents a "bow shape" in the plug body; 2. The concentricity between the valve core and the plug body is insufficient; after the sealing stuffing box is installed, A part of the sealed stuffing box will be subjected to greater pressure, so the angle plug will easily leak over time); the annular airbag is provided with two vent pipes 26 connected thereto, the pipe opening of the vent pipe 26 away from the annular airbag is arranged outside the angle plug through a channel arranged in the plug body or the plug cover wall, an opening and closing valve is arranged at the end of the vent pipe 26 outside the angle plug, and the pipe opening of the vent pipe outside the angle plug is connected to the air pump 27 for inflating the annular airbag after the valve core is placed in the plug body and the plug body and the plug cover are fastened by bolt connectors. If the concentricity of the valve core and the plug body is not enough, that is, the valve core is more to the left or more to the right relative to the plug body, the annular airbag will move the valve core to the direction with lower pressure (that is, rightward or leftward) when it is filled with air. Although the stuffing box itself has a certain elasticity, the elasticity is small and is not enough to push the valve core to move. Over time, the part of the stuffing box that is under greater pressure is prone to damage, and the part of the stuffing box that is under less pressure is also prone to leakage. After such arrangement, the annular airbag can push the part of the inner sealing stuffing box that is under greater pressure to move in the relative direction to push the valve core to move, thereby ensuring the concentricity of the valve core and the plug body.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A process for processing a corner plug door, characterized in that: It consists of the following process steps performed in sequence: S1: Turn the hole and flange surface of the stainless steel plug cover blank, then drill and tap to produce npt3 / 4 pipe thread; remove burrs; S2: drilling a hole in the cast stainless steel plug body blank to form a sealing sleeve step on the inner wall of the plug body pipe opening; A cylinder with the same height as the drill bit is fixedly arranged on the base of the drilling equipment, and a distance is set between the cylinder and the drill bit to avoid motion interference in drilling; a labeling device or a punching device is fixedly arranged on the cylinder to indicate the position of the thread starting point in the plug door body; After drilling, tapping is performed to produce threads located further inside the sealing sleeve step; S3: placing the valve core in the plug gate body, fastening the valve stem to the valve core and then fastening the valve stem to the handle; fastening the plug gate cover to the plug gate body through a bolt connector to form the angled plug gate; The angled plug gate is composed of a plug gate body, a plug gate cover on one side of the plug gate body, a valve core arranged in the plug gate body, a valve stem fixedly connected to the valve core, and a handle fixedly connected to the valve stem; The handle is located outside the plug door body and above the plug door body; the plug door body and the plug door cover are fastened together by bolt connectors; a marking layer or through hole is provided on the outer surface of the plug door body to indicate the position of the starting point of the thread inside the plug door body; The outer surface of the plug valve is provided with a through hole; the valve core is in a hollow spherical shape for weight reduction; the valve hole on the valve core is arranged to penetrate the valve core horizontally; The valve core is provided with an opening, which is higher than the valve hole, and the rotation axis of the opening is arranged at an angle with the rotation axis of the valve hole; the through hole on the plug body is connected with the opening through a connecting channel in the plug body wall and a connecting channel in the valve core wall; The connecting channel is a constant diameter channel; the aperture of the opening is consistent with the aperture of the connecting channel; the aperture of the through hole is smaller than the aperture of the opening; The bolt connector includes a bolt, a nut matched with the bolt and an inner ring locking washer; the opposite ends of the plug body are provided with npt3 / 4 pipe threads to achieve connection with the train main pipe or connecting pipe.

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