Dismounting device for valve element of air outlet check valve of locomotive air dryer

Abstract

The invention provides a locomotive air dryer air outlet check valve element dismounting device which comprises a connecting rod, a sleeve and a cone in a circular truncated cone shape, a threaded rod is arranged at the lower end of the connecting rod, the connecting rod and the threaded rod are coaxial, the threaded rod is sleeved with an adjusting nut, the cone is sleeved with the sleeve, and a groove hole for containing the cone is formed in the sleeve. The sleeve is provided with an axial through hole communicated with the slotted hole, the lower end of the threaded rod penetrates through the axial through hole to be connected with the cone, two opposite side through holes are formed in the outer wall of the sleeve, the side through holes are communicated with the slotted hole, each side through hole corresponds to one stop pin, the stop pins and the side through holes are coaxial, one end of each stop pin extends into the corresponding side through hole, and the other end of each stop pin extends into the corresponding slotted hole. The stop pin is sleeved with a first spring, one end of the first spring is fixed to the inner wall of the groove hole, and the other end of the first spring makes contact with the surface of an annular table arranged on the stop pin. The method has the beneficial effects that the use method is simple and labor-saving; during disassembly, the disassembly part cannot be damaged; time and labor are saved; the structure is simple and cost is low.

Description

Technical Field

[0001] The invention relates to the field of railway locomotive maintenance and disassembly devices, in particular to a locomotive air dryer air outlet check valve core disassembly device. Background Art

[0002] In the field of locomotive maintenance, the air dryer is an important component of the brake system. The stability of the air dryer performance is directly related to the reliability of the locomotive air brake system and the driving safety of the locomotive. However, its operating environment is relatively harsh. The O-ring installed on the valve core of the air outlet check valve is matched with the valve body clearance, which is easy to get stuck during maintenance and difficult to disassemble. In addition, the valve core and valve body are made of aluminum alloy. Using tools such as needle-nosed pliers and screwdrivers to disassemble them is easy to cause damage to the outer surface of the valve body and valve core, which is easy to cause poor function of the air outlet check valve. Therefore, it is particularly important to design and manufacture a device for disassembling the valve core of the air dryer air outlet check valve. The defects of the existing disassembly of the valve core of the air outlet check valve are: uneven force, which is not easy to disassemble; it is easy to damage the valve core and valve body, and the maintenance cost is increased; it is easy to scratch the sealing surface, which affects the performance of the air outlet check valve; it is easy to loosen when using needle-nosed pliers and screwdrivers, which poses a safety hazard. Summary of the invention

[0003] The problem to be solved by the present invention is to provide a valve core disassembly device for an air outlet check valve of a locomotive air dryer, which overcomes the shortcomings of the prior art.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a locomotive air dryer outlet check valve core disassembly device, comprising a connecting rod, a sleeve and a truncated cone, the lower end of the connecting rod is provided with a threaded rod, the connecting rod is coaxial with the threaded rod, an adjusting nut is sleeved on the threaded rod, the sleeve is sleeved outside the cone, the sleeve has a slot hole for accommodating the cone, the sleeve has an axial through hole penetrating the slot hole, the lower end of the threaded rod passes through the axial through hole and is connected to the cone, the outer wall of the sleeve has two side through holes arranged oppositely, the side through holes penetrate the slot hole, each of the side through holes corresponds to a stop pin, the stop pin is coaxial with the side through hole, one end of the stop pin extends into the side through hole, and the other end contacts the side surface of the cone, a first spring is sleeved on the stop pin, one end of the first spring is fixed to the inner wall of the slot hole and the other end contacts the surface of the ring stage arranged on the stop pin.

[0005] Optionally, the end of the stop pin that contacts the cone is a spherical head structure.

[0006] Optionally, the outer diameter of the connecting rod is greater than the outer diameter of the sleeve, and a striker is slidably sleeved on the connecting rod.

[0007] Optionally, the slot is a conical slot, and a second spring is provided in the conical slot. The second spring is sleeved on the threaded rod, and two ends of the second spring are in contact with the top surface of the cone and the top surface of the slot respectively.

[0008] Optionally, the bottom of the cone has hexagonal grooves.

[0009] The advantages and positive effects of the present invention are: the device can avoid damage to the valve core and valve body made of aluminum alloy to the greatest extent during the disassembly process, and the use method is simple and labor-saving; the connection is firm and the disassembly is simple, and no damage is caused to the disassembled parts; it saves time and labor; the structure is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the explosion structure of a specific embodiment of the present invention;

[0011] Figure 2 yes Figure 1 Schematic diagram of the combined structure after removing the sleeve;

[0012] Figure 3 It is a longitudinal cross-sectional schematic diagram of the structure of a specific embodiment of the present invention;

[0013] Figure 4 is a schematic diagram of a use state 1 of a specific embodiment of the present invention;

[0014] Figure 5 is a schematic diagram of a use state 2 of a specific embodiment of the present invention;

[0015] In the figure: 1. cone; 1-1. threaded hole; 2. sleeve; 2-1. side through hole; 2-2. axial through hole; 2-3. slotted hole; 3. adjusting nut; 4. connecting rod; 4-1. threaded rod; 5. impact iron; 6. first spring; 7. second spring; 8. stop pin; 8-1. spherical head structure; 9. valve core; 10. O-ring; 11. valve body. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0017] like Figure 1-Figure 3 As shown, the present invention provides a locomotive air dryer outlet check valve core disassembly device, comprising a connecting rod 4, a sleeve 2 and a truncated cone 1, the lower end of the connecting rod 4 is provided with a threaded rod 4-1, the connecting rod 4 is coaxial with the threaded rod 4-1, an adjusting nut 3 is sleeved on the threaded rod 4-1, the sleeve 2 is sleeved outside the cone 1, the sleeve 2 is provided with a slot 2-3 for accommodating the cone 1, the sleeve 2 is provided with an axial through hole 2-2 penetrating the slot 2-3, the lower end of the threaded rod 4-1 passes through the axial through hole 2-2 and is connected to the threaded hole 1-1 provided at the top of the cone 1, the bottom of the cone 1 is provided with an inner six groove, and the inner six groove is used as The purpose is that during the connection process between the threaded rod 4-1 and the cone 1, a tool can be used to extend into the inner six grooves to tighten the cone 1 and the threaded rod 4-1. The outer wall of the sleeve 2 has two side through holes 2-1 arranged opposite to each other. The side through holes 2-1 are connected with the slot hole 2-3. Each side through hole 2-1 corresponds to a stop pin 8. The stop pin 8 is coaxial with the side through hole 2-1. One end of the stop pin 8 extends into the side through hole 2-1, and the other end contacts the side surface of the cone 1. A first spring 6 is sleeved on the stop pin 8. One end of the first spring 6 is fixed on the inner wall of the slot hole 2-3, and the other end contacts the surface of the ring stage arranged on the stop pin 8.

[0018] In order to make the stop pin 8 contact the side surface of the cone 1 better and slide on the side surface of the cone 1, the end of the stop pin 8 contacting the cone 1 is set as a spherical head structure 8-1.

[0019] When the above structure is used, Figure 4 , Figure 5As shown, first, insert the sleeve 2 into the center hole of the valve core 9, rotate the adjusting nut 3 to move the cone 1 upward, at this time, the stop pin 8 moves toward the outside of the sleeve 1 along the direction of the side through hole 2-1 under the action of the side of the cone 1, and at the same time the first spring 6 is compressed, and the outer end of the stop pin 8 extends out of the sleeve 2 and extends into the hole in the valve core 9. The stop pin 8 connects and locks the valve core 9 with the valve core disassembly device of the present invention, controls the upward freedom of the valve body 11, and at the same time pulls up the entire valve core disassembly device to separate the valve core 9 from the valve body 11, so as to achieve the purpose of disassembling the valve core 9, and then rotate the adjusting nut 3 in the opposite direction to move the cone 1 downward, and the stop pin 8 shrinks backward under the action of the first spring 6 and disengages from the hole on the valve core 9.

[0020] In order to overcome the friction between the O-ring 10 on the valve core 9 and the contact surface of the valve body and make the disassembly process smoother, the outer diameter of the connecting rod 4 is designed to be larger than the outer diameter of the sleeve 2 in the present device, and a striker 5 is slidably sleeved on the connecting rod 4. After the stop pin 8 and the valve core 9 are locked, the striker 5 is lifted to a certain height and then allowed to fall freely, and the valve body 10 is impacted by the striker 5. Since the striker 5 is coaxial with the valve core 9 and the valve body 11, the force acting on the valve body 11 is evenly distributed, so that the O-ring 10 on the valve core 9 and the valve body 11 produce relative movement under the action of vibration, and then the O-ring 10 of the valve core 9 and the valve body 11 become loose, which makes it easy for the valve core 9 to follow the entire valve core disassembly device to fall off the valve body 11 upward.

[0021] The slot 2-3 is a conical slot, and a second spring 7 is arranged inside the conical slot. The second spring 7 is sleeved on the threaded rod 4-1, and the two ends of the second spring 7 are in contact with the top surface of the cone 1 and the top surface of the slot 2-3 respectively. The second spring 7 is arranged so that after the striker 5 strikes the valve body 11, the valve core 9 vibrates up and down multiple times under the elastic force of the second spring, and the vibration is relatively gentle, and the O-ring 10 on the valve core 9 and the valve body 11 can loosen each other when the relative moving distance is small, so that the damage to the valve body 11 and the valve core 9 during the disassembly process can be minimized.

[0022] The embodiments of the present invention are described in detail above, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A locomotive air dryer outlet check valve core disassembly device, characterized in that: The invention comprises a connecting rod, a sleeve and a truncated cone, the lower end of the connecting rod is provided with a threaded rod, the connecting rod is coaxial with the threaded rod, an adjusting nut is sleeved on the threaded rod, the sleeve is sleeved outside the cone, the sleeve has a slot hole for accommodating the cone, the sleeve has an axial through hole which penetrates the slot hole, the lower end of the threaded rod passes through the axial through hole and is connected to the cone, the outer wall of the sleeve has two side through holes which are oppositely arranged, the side through holes penetrate the slot hole, each of the side through holes corresponds to a stop pin, the stop pin is coaxial with the side through hole, one end of the stop pin extends into the side through hole, and the other end contacts the side surface of the cone, a first spring is sleeved on the stop pin, one end of the first spring is fixed on the inner wall of the slot hole, and the other end contacts the surface of the annular stage arranged on the stop pin.

2. The locomotive air dryer outlet check valve core disassembly device according to claim 1, characterized in that: The end of the stop pin that contacts the cone is a spherical head structure.

3. The locomotive air dryer outlet check valve core disassembly device according to claim 1 or 2, characterized in that: The outer diameter of the connecting rod is greater than the outer diameter of the sleeve, and a striker is slidably sleeved on the connecting rod.

4. The device for disassembling the valve core of the air outlet check valve of a locomotive air dryer according to claim 3, characterized in that: The slot is a conical slot, and a second spring is arranged in the conical slot. The second spring is sleeved on the threaded rod, and two ends of the second spring are in contact with the top surface of the cone and the top surface of the slot respectively.

5. The device for disassembling the valve core of the air outlet check valve of a locomotive air dryer according to claim 4, characterized in that: The bottom of the cone has hexagonal grooves.

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