Novel travel switch suitable for air brake position judgment
Through the built-in slot infrared photoelectric inductive contact stroke switch, the problems of large dead zones and easy damage in the position detection of the wind gate are solved, and more accurate judgment of the wind gate position and improvement of equipment reliability are achieved.
Patent Information
- Application Number
- CN202422292095.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-09-20
AI Technical Summary
In the detection of the wind gate position, the existing traditional mechanical stroke switch has large dead zones, short action strokes, and is easily damaged, resulting in inaccurate judgment of the wind gate position and affecting the reliability of the equipment.
It adopts a built-in slot infrared photoelectric inductive contact stroke switch. Through the design of push rod and return spring, the action dead zone is small and the action stroke is long, avoiding mechanical contact damage, and is equipped with shell protection to resist external interference and oil pollution.
It improves the accuracy of wind gate position judgment and equipment reliability, avoids mechanical damage to stroke switch nodes, ensures stable feedback of signals, and enhances the durability and pollution resistance of the equipment.
Smart Images
Figure CN223261522U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of wind brake position signal devices, and particularly relates to a novel travel switch suitable for wind brake position judgment. Background Art
[0002] The damper position signal mainly feeds back the actual position of the brake damper, which is convenient for understanding the operating status of the equipment. This signal directly affects the start-up and shutdown process of the unit, and in severe cases, it may cause the start-up and shutdown failure. Figure 5 and Figure 6 As shown, most power plants currently use traditional mechanical limit switches to detect damper position. During the initial operation of a unit, the brake pads are relatively smooth, the braking process is smooth, and the detection reliability of traditional mechanical limit switches meets requirements. However, as the number of unit braking increases, the wear of the brake pads varies, and the same damper may sometimes have different positions when it is raised and retracted, with errors reaching 1 to 4 mm. Furthermore, due to the 2 to 3 mm deadband of traditional mechanical limit switches, the damper plate pressure roller must be pushed downward at least 3 mm for actuation, resulting in an actuation stroke of approximately 3 to 7 mm, with a margin of 4 mm. If the limit switch is adjusted too close, the mechanical limit switch nodes that directly contact the transmission mechanism may be easily damaged by vibration or even collision. If the limit switch is adjusted just enough to actuate and then pressed 1 to 2 mm, the damper may fail to actuate due to accidental deviations in its actuation. Utility Model Content
[0003] In order to solve the above-mentioned problems existing in the prior art, the purpose of the utility model is to provide a contact-type travel switch with a built-in slot-type infrared photoelectric sensor, which has the advantages of a small action dead zone and a long action stroke, thereby avoiding damage to the travel switch node, more accurately feeding back the actual position of the wind gate, and improving equipment reliability.
[0004] The technical solution adopted by this utility model is:
[0005] A new type of travel switch suitable for judging the position of a wind gate includes a shell, a push rod is arranged inside the shell, one end of the push rod extends out of the shell, a reset spring is connected between the push rod and the shell, and a slot-shaped infrared photoelectric switch is also installed in the shell.
[0006] When the damper is engaged, it drives the damper plate, which is fixed to the brake pad, downward. The damper plate pushes the roller and push rod downward, compressing the return spring. The push rod blocks the light path of the slot-type infrared photoelectric switch, causing the normally open node of the slot-type infrared photoelectric switch to close (normally closed to open). When the damper is withdrawn, the damper plate moves upward, the return spring resets, and pushes the roller and push rod back to center.
[0007] This new type of travel switch has the advantages of a small dead zone and a long travel range, preventing damage to the travel switch node, providing more accurate feedback on the actual position of the damper, and improving equipment reliability. In addition, the new travel switch is protected by a protective casing, which can effectively avoid external interference and on-site oil contamination, ensuring the normal operation of the built-in slot-type infrared photoelectric sensor switch.
[0008] As a preferred embodiment of the present invention, the end of the push rod extending from the housing is rotatably connected to a roller, which contacts the damper plate. The roller and push rod are integrally connected via a fixed shaft, and the roller drives the push rod downward. The roller and push rod are made of metal, and the roller can rotate 360 degrees.
[0009] As a preferred solution of the present invention, the push rod includes a push rod section one, a push rod section two and a push rod section three which are connected in sequence and have decreasing diameters in sequence, the outer shell includes an outer shell section one, an outer shell section two and an outer shell section three which are connected in sequence, one end of the push rod section one extends out of the outer shell section one, the return spring is sleeved on the push rod section three, and one end of the return spring is limited by the step between the push rod section two and the push rod section three.
[0010] As a preferred solution of the present invention, the other end of the reset spring is connected to the dividing line between the second section and the third section of the housing.
[0011] As a preferred solution of the present invention, a limiting step is provided between the first and second shell sections, the limiting step blocking the step between the first and second push rod sections. The limiting step limits the extreme position of the push rod.
[0012] As a preferred embodiment of the present invention, a 1mm gap is left between the dividing line between the second and third housing sections and the slot-shaped infrared photoelectric switch. The infrared sensing area can be adjusted based on actual conditions. To prevent the switch from being overly sensitive, the infrared sensing area is located 1mm above the slot-shaped switch.
[0013] As a preferred embodiment of the present invention, the slot-shaped infrared photoelectric switch includes an infrared emitter and an infrared receiver, which are respectively arranged on both sides of the push rod. Because the push rod and the slot-shaped infrared photoelectric switch are non-contact, there is no risk of mechanical damage.
[0014] As a preferred solution of the present utility model, an infrared switch action indicator light is installed on the housing, and the slot-shaped infrared photoelectric switch is electrically connected to the infrared switch action indicator light.
[0015] As a preferred solution of the present invention, an observation window is provided on the housing corresponding to the infrared switch action indicator light. The indicator light can be directly observed from the observation window, making it convenient to check whether the travel switch is actuated.
[0016] As a preferred embodiment of the present invention, the push rod has an operating stroke of 2 to 9 mm. The operating stroke of the novel travel switch can be adjusted within a range of 2 to 9 mm (designed according to actual needs), and the operating stroke of the travel switch can be adjusted to 5 to 6 mm, avoiding the dead zone of traditional mechanical travel switches and node refusal to operate due to accidental deviations in the damper operation.
[0017] The beneficial effects of the utility model are:
[0018] This new type of travel switch has the advantages of a small dead zone and a long travel range, preventing damage to the travel switch node, providing more accurate feedback on the actual position of the damper, and improving equipment reliability. In addition, the new travel switch is protected by a protective casing, which can effectively avoid external interference and on-site oil contamination, ensuring the normal operation of the built-in slot-type infrared photoelectric sensor switch. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a cross-sectional view of the present invention when it is not in operation;
[0020] Figure 2 It is a structural diagram of the utility model;
[0021] Figure 3 It is a cross-sectional view of the utility model when the wind gate is put into operation;
[0022] Figure 4 It is a cross-sectional view of the utility model when the wind gate is withdrawn;
[0023] Figure 5 This is a cross-sectional view of a traditional mechanical travel switch when the damper is in operation;
[0024] Figure 6 It is a cross-sectional view of a traditional mechanical travel switch when the damper is withdrawn.
[0025] In the figure: 1-roller; 2-housing; 3-observation window; 4-push rod; 5-reset spring; 6-slot-type infrared photoelectric switch; 7-infrared transmitter; 8-infrared receiver; 9-infrared switch action indicator light; 21-housing section 1; 22-housing section 2; 23-housing section 3; 41-push rod section 1; 42-push rod section 2; 43-push rod section 3. DETAILED DESCRIPTION
[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.
[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without inventive effort are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features therein may be combined with each other unless there is a conflict.
[0028] like Figures 1 to 4 As shown, the new travel switch suitable for judging the position of the wind gate of this embodiment includes a housing 2, a push rod 4 is provided in the housing 2, one end of the push rod 4 extends out of the housing 2, a reset spring 5 is connected between the push rod 4 and the housing 2, and a slot-type infrared photoelectric switch 6 is also installed in the housing 2; when the wind gate is put into operation, the wind gate baffle pushes the push rod 4, and the push rod 4 blocks the light path of the slot-type infrared photoelectric switch 6; when the wind gate is withdrawn, the wind gate baffle is pushed up by the reset spring 5, and the push rod 4 withdraws and blocks the light path of the slot-type infrared photoelectric switch 6.
[0029] When the damper is engaged, the damper baffle, which is fixed to the brake pad, moves downward. The damper baffle pushes the roller 1 and push rod 4 downward, compressing the return spring 5. The push rod 4 blocks the light path of the slot-type infrared photoelectric switch 6, closing the normally open node (normally closed). When the damper is withdrawn, the damper baffle moves upward, the return spring 5 resets, and pushes the roller 1 and push rod 4 back to center.
[0030] The utility model has the advantages of a small dead zone and a long operating stroke, which prevents the travel switch node from being damaged by collision, more accurately feedbacks the actual position of the wind gate, and improves the reliability of the equipment. In addition, the new travel switch is protected by a housing 2, which can effectively avoid external interference and on-site oil pollution, ensuring the normal operation of the built-in slot-type infrared photoelectric sensor switch.
[0031] Furthermore, the end of the push rod 4 extending from the housing 2 is rotatably connected to a roller 1, which contacts the damper plate. The roller 1 and push rod 4 are connected as a whole via a fixed axis, and the roller 1 drives the push rod 4 downward. The roller 1 and push rod 4 are made of metal, and the roller 1 can rotate 360 degrees.
[0032] Specifically, the push rod 4 includes a first push rod section 41, a second push rod section 42, and a third push rod section 43, which are sequentially connected and have decreasing diameters. The housing 2 includes a first housing section 21, a second housing section 22, and a third housing section 23, which are sequentially connected. One end of the first push rod section 41 extends out of the first housing section 21. The return spring 5 is sleeved on the third push rod section 43. One end of the return spring 5 is limited by the step between the second push rod section 42 and the third push rod section 43. The other end of the return spring 5 is connected to the dividing line between the second housing section 22 and the third housing section 23.
[0033] In order to limit the push rod 4, a limiting step is provided between the first shell section 21 and the second shell section 22, and the limiting step blocks the step between the first push rod section 41 and the second push rod section 42. The limiting step limits the extreme position of the push rod 4.
[0034] Furthermore, Figure 2 As shown, a 1mm gap is left between the dividing line between the second and third housing sections 22, 23, and the slot-shaped infrared photoelectric switch 6. The infrared sensing area can be adjusted according to actual conditions. To prevent the switch from being too sensitive, the infrared sensing area is located 1mm above the slot-shaped switch.
[0035] Specifically, the slot-shaped infrared photoelectric switch 6 includes an infrared transmitter 7 and an infrared receiver 8, which are respectively arranged on both sides of the push rod 4. Because the push rod 4 and the slot-shaped infrared photoelectric switch 6 are non-contact, there is no risk of mechanical damage.
[0036] An infrared switch action indicator light 9 is mounted on the housing 2 , and the slot-shaped infrared photoelectric switch 6 is electrically connected to the infrared switch action indicator light 9 .
[0037] An observation window 3 is provided on the housing 2 corresponding to the infrared switch action indicator light 9. The indicator light can be directly observed from the observation window 3, which facilitates checking whether the travel switch is actuated.
[0038] like Figure 3 and Figure 4 As shown, the stroke of the push rod 4 is 2 to 9 mm. The stroke of the new travel switch can be adjusted within the range of 2 to 9 mm (can be designed according to actual needs), and the stroke of the travel switch can be adjusted to 5 to 6 mm, avoiding the dead zone of traditional mechanical travel switches and node refusal caused by accidental deviation of the wind gate operation.
[0039] The reset spring 5 is lengthened to make the action stroke of the novel travel switch larger. The reset spring 5 has a stable elastic coefficient, a fast recovery speed, and a high material strength. Compared with the conventional travel switch, the reset spring 5 is lengthened to make the action stroke of the novel travel switch larger.
[0040] The housing 2 can effectively avoid external interference and on-site oil pollution, ensuring the normal operation of the built-in slot-type infrared photoelectric sensor switch.
[0041] The present invention is not limited to the above-mentioned optional implementation methods. Anyone can derive various other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that falls within the scope defined by the claims of the present invention shall fall within the scope of protection of the present invention.
Claims
1. A new type of travel switch suitable for judging the position of a damper, characterized by: The invention comprises a housing (2), a push rod (4) is sleeved in the housing (2), one end of the push rod (4) extends out of the housing (2), a return spring (5) is connected between the push rod (4) and the housing (2), and a slot-shaped infrared photoelectric switch (6) is also installed in the housing (2); when the wind gate is engaged, the wind gate baffle pushes the push rod (4), and the push rod (4) blocks the light path of the slot-shaped infrared photoelectric switch (6); when the wind gate is withdrawn, the wind gate baffle is pushed up by the return spring (5), and the push rod (4) withdraws to block the light path of the slot-shaped infrared photoelectric switch (6).
2. A novel travel switch suitable for determining the position of a damper according to claim 1, characterized in that: One end of the push rod (4) extending out of the housing (2) is rotatably connected to a roller (1), and the roller (1) is in contact with the wind damper baffle.
3. A novel travel switch suitable for determining the position of a damper according to claim 1, characterized in that: The push rod (4) includes a push rod section (41), a push rod section (42) and a push rod section (43) which are connected in sequence and have decreasing diameters in sequence. The housing (2) includes a housing section (21), a housing section (22) and a housing section (23) which are connected in sequence. One end of the push rod section (41) extends out of the housing section (21). A return spring (5) is sleeved on the push rod section (43). One end of the return spring (5) is limited by a step between the push rod section (42) and the push rod section (43).
4. A novel travel switch suitable for determining the position of a damper according to claim 3, characterized in that: The other end of the return spring (5) is connected to the dividing line between the second shell section (22) and the third shell section (23).
5. A novel travel switch suitable for determining the position of a damper according to claim 3, characterized in that: A limiting step is provided between the first shell section (21) and the second shell section (22), and the limiting step blocks the step between the first push rod section (41) and the second push rod section (42).
6. A novel travel switch suitable for determining the position of a damper according to claim 4, characterized in that: A gap of 1 mm is left between the dividing line between the second shell section (22) and the third shell section (23) and the slot-shaped infrared photoelectric switch (6).
7. A novel travel switch suitable for determining the position of a damper according to claim 1, characterized in that: The slot-shaped infrared photoelectric switch (6) comprises an infrared transmitter (7) and an infrared receiver (8), and the infrared transmitter (7) and the infrared receiver (8) are respectively arranged on both sides of the push rod (4).
8. The novel travel switch suitable for judging the position of a damper according to claim 1, characterized in that: An infrared switch action indicator light (9) is installed on the housing (2), and the slot-shaped infrared photoelectric switch (6) is electrically connected to the infrared switch action indicator light (9).
9. A novel travel switch suitable for determining the position of a damper according to claim 8, characterized in that: An observation window (3) is provided on the housing (2) at a position corresponding to the infrared switch action indicator light (9).
10. A novel travel switch suitable for determining the position of a damper according to any one of claims 1 to 9, characterized in that: The action stroke of the push rod (4) is 2 to 9 mm.