Pressure switch with time delay function
By introducing components such as buoyancy plates, support rods and conductive rods into the pressure switch, the delay function is achieved, and the damage caused by frequent start and stop is solved. The cleaning rods and limiters ensure the filter is clean, providing an emergency stop function. Improves the stability and safety of pressure switches.
Patent Information
- Application Number
- CN202420929082.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-30
AI Technical Summary
Existing pressure switches may frequently start and stop when system pressure is critical, resulting in overheating damage to the contactor and pump, and lack effective delay function to prevent such damage.
A pressure switch with delay function was designed. Through components such as buoyancy plate, support rod, rotor, trapezoidal slider, conductive rod and return spring, the delay function of the switch is realized to avoid frequent start and stop; , through components such as water inlet holes, fans, cleaning rods and limiter shells, the filter screen is cleaned, and manual emergency control is achieved through glass, manual lever and insulating sleeve.
It effectively avoids overheating damage to electrical equipment and pumps caused by frequent start and stop, ensures stable operation of pressure switches, and prevents inadequate cleaning of the filter due to gaps through the cleaning function, and provides an emergency stop function.
Smart Images
Figure CN222281819U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pressure switches, in particular to a pressure switch with a time delay function. Background Art
[0002] The pressure switch is a differential pressure controller, which is used as a protective device for refrigeration compressors or other mechanical pressure lubrication. In the refrigeration system, in order to ensure that the moving friction parts of the compressor can be well lubricated, the lubrication system must maintain a certain oil pressure. If the oil pressure is too low, the compressor will lose oil during normal operation or startup, causing cylinder seizure accidents, or even burning the compressor bearings. In order to prevent this phenomenon, an oil pressure controller with a delay mechanism control must be installed. It receives the effects of two pressure signals, the discharge pressure of the lubricating oil pump and the suction pressure of the compressor, and maintains a certain difference range between the two pressures. When this difference is less than the set value, the switch in the controller will be activated, automatically cutting off the compressor circuit, stopping the compressor, and playing a safety protection role.
[0003] For example, a pressure switch with an authorization announcement number of CN216487850U and an announcement date of 2022.05.10 includes a pressure switch body, a connecting pipe is installed at one end of the pressure switch body, and pins A and B are fixedly installed at the other end of the connecting pipe. A sliding groove is opened on the surface of the pressure switch body, and a slider is slidably connected to the inner wall of the sliding groove, and a protective shell is fixedly installed on the side of the slider.
[0004] When the system pressure is at a critical value, the existing pressure switch may start and stop frequently, which will cause the contactor and pump to operate frequently, causing overheating and damage to electrical equipment and pumps. Therefore, it is urgent to design a pressure switch with a delay function to solve the above problems. Utility Model Content
[0005] The utility model aims to solve the shortcomings in the prior art and proposes a pressure switch with a time delay function.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A pressure switch with a delay function comprises a shell and a sealing cover, a buoyancy plate is slidably connected to the inside of the shell, and a support rod is arranged on the outer wall at the top of the buoyancy plate, one end of the support rod is rotatably connected to a rotating wheel through a bearing, a sliding groove is opened on the inner wall of the shell, and a sealing ring is arranged inside the sliding groove, the outer wall of the support rod is connected to the sealing ring, a trapezoidal slider is slidably connected to the outer wall at the top of the shell, and a conductive rod is welded on the outer wall on one side of the trapezoidal slider, an access end is welded on the outer wall at the top of the trapezoidal slider, a conductive seat is welded on one end of the conductive rod, and a return spring is sleeved on the outer wall of the conductive rod, a conductive block is arranged on the outer wall at the top of the shell, and an access end is welded on the outer wall at the top of the conductive block, a contact plate is slidably connected to the outer wall at the top of the shell, and a conductive spring is connected between the outer wall on one side of the conductive block and the outer wall on one side of the contact plate.
[0008] Furthermore, a water inlet hole is provided on the outer wall of the bottom of the shell, and a rotating rod is rotatably connected to the inner wall of the bottom of the shell via a bearing.
[0009] Furthermore, a fan and a cleaning rod are welded on the outer wall of the rotating rod in sequence from bottom to top, and a limiter housing is arranged on the outer wall of the top of the cleaning rod.
[0010] Furthermore, the interior of the limiter housing is slidably connected to the limit fixing plate, and a limit spring is connected between the interior of the limiter housing and the outer wall at the bottom of the limit fixing plate.
[0011] Furthermore, a cleaning brush is arranged on the outer wall of the top of the limiting fixing plate, and a filter is arranged on the inner wall of the shell.
[0012] Furthermore, a manual lever is provided on the outer wall of the top of the trapezoidal sliding block, and one end of the manual lever is sleeved with an insulating sleeve.
[0013] Furthermore, a sealing cover is provided on the top of the shell, a glass is provided on the front side of the shell, and fixing ears are provided on both sides of the shell.
[0014] The beneficial effects of the utility model are:
[0015] 1. By setting the buoyancy plate, support rod, sliding groove, rotating wheel, trapezoidal slider, conductive rod, conductive seat, return spring, contact plate, conductive spring and conductive block, the buoyancy plate rises, the buoyancy plate drives the support rod to move, the support rod slides in the sliding groove, the support rod drives the rotating wheel to move, the rotating wheel contacts the trapezoidal slider, the rotating wheel rotates, drives the trapezoidal slider to move, the trapezoidal slider drives the conductive rod to move, the conductive rod drives the conductive seat to move, the trapezoidal slider squeezes the return spring, the conductive seat squeezes the contact plate, and the contact plate squeezes the conductive spring, thereby realizing the function of delaying the switch and solving the problem of overheating and damage of electrical equipment and pumps caused by frequent starting and stopping.
[0016] 2. Through the water inlet hole, rotating rod, fan, cleaning rod, limiter housing, limit fixing plate, cleaning brush and limit spring, water flows through the water inlet hole, the fan drives the rotating rod to rotate, and the rotating rod drives the cleaning rod to rotate, thereby realizing the function of cleaning the filter net, the cleaning rod drives the limiter housing to move, the limiter housing drives the limit fixing plate to move, the limit spring provides elastic force to the limit fixing plate, and the limit fixing plate squeezes the cleaning brush, thereby realizing the squeezing effect of the brush on the filter net, solving the problem of inadequate cleaning caused by the gap between the filter net and the cleaning brush.
[0017] 3. Through the glass, manual lever and insulating sleeve, the situation inside the shell can be observed through the glass. The insulating sleeve drives the manual lever to move, realizing the function of manual emergency regulation of the internal situation of the pressure switch, solving the problem that manual emergency stop operation cannot be carried out. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a three-dimensional structural diagram of a pressure switch with a time delay function proposed by the utility model;
[0019] Figure 2 This is a front view cross-sectional structural diagram of a pressure switch with a time delay function proposed by the utility model;
[0020] Figure 3 This is an enlarged structural diagram of the limiter housing of the pressure switch with a delay function proposed by the utility model;
[0021] Figure 4 This is a partial enlarged structural diagram of the pressure switch with delay function proposed by the utility model.
[0022] In the figure: 1. Shell; 2. Sealing cover; 3. Buoyancy plate; 4. Support rod; 5. Sealing ring; 6. Sliding groove; 7. Rotating wheel; 8. Trapezoidal slider; 9. Conductive rod; 10. Conductive seat; 11. Return spring; 12. Contact plate; 13. Conductive spring; 14. Conductive block; 15. Inlet end; 16. Outlet end; 17. Water inlet hole; 18. Rotating rod; 19. Fan; 20. Cleaning rod; 21. Limiter housing; 22. Limit fixing plate; 23. Cleaning brush; 24. Limit spring; 25. Glass; 26. Manual lever; 27. Fixed ear; 28. Filter; 29. Insulating sleeve. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.
[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0026] Reference Figure 1-4 The pressure switch with a time-delay function comprises a housing 1 and a sealing cover 2. A buoyancy plate 3 is slidably connected inside the housing 1, and a support rod 4 is arranged on the outer wall at the top of the buoyancy plate 3. One end of the support rod 4 is rotatably connected to a runner 7 through a bearing. A sliding groove 6 is provided on the inner wall of the housing 1, and a sealing ring 5 is arranged inside the sliding groove 6. The outer wall of the support rod 4 is connected to the sealing ring 5. A trapezoidal slider 8 is slidably connected to the outer wall at the top of the housing 1, and a conductive rod 9 is welded on the outer wall on one side of the trapezoidal slider 8. A connection end 16 is welded on the outer wall at the top of the trapezoidal slider 8, and a conductive seat 10 is welded at one end of the conductive rod 9. , and a return spring 11 is sleeved on the outer wall of the conductive rod 9, a conductive block 14 is arranged on the outer wall of the top of the shell 1, and an access end 15 is welded on the outer wall at the top of the conductive block 14, a contact plate 12 is slidably connected to the outer wall at the top of the shell 1, and a conductive spring 13 is connected between the outer wall on one side of the conductive block 14 and the outer wall on one side of the contact plate 12, the buoyancy plate 3 drives the support rod 4 to move, the support rod 4 drives the rotating wheel 7 to move, the rotating wheel 7 contacts and moves with the trapezoidal slider 8, the trapezoidal slider 8 drives the conductive rod 9 to move, and the conductive rod 9 drives the conductive seat 10 to move, thereby realizing the function of automatically adjusting the opening and closing according to the water pressure.
[0027] In one embodiment provided by the present utility model, Figure 2 As shown, a water inlet hole 17 is provided on the outer wall at the bottom of the shell 1, and a rotating rod 18 is rotatably connected to the inner wall at the bottom of the shell 1 through a bearing. The water inlet hole 17 increases the pressure of the water flow entering the shell 1, thereby driving the fan 19 to rotate.
[0028] In another embodiment provided by the present utility model, Figure 2 As shown, a fan 19 and a cleaning rod 20 are welded on the outer wall of the rotating rod 18 from bottom to top in sequence, and a limiter housing 21 is provided on the outer wall at the top of the cleaning rod 20. The rotating rod 18 drives the cleaning rod 20 to rotate, thereby realizing the function of cleaning the filter 28.
[0029] In another embodiment provided by the present utility model, Figure 2 and Figure 3 As shown, the interior of the limiter housing 21 is slidably connected to the limiter fixing plate 22, and a limiter spring 24 is connected between the interior of the limiter housing 21 and the outer wall at the bottom of the limiter fixing plate 22. The limiter spring 24 provides elastic force to the limiter fixing plate 22, thereby solving the problem of a gap between the cleaning brush 23 and the filter screen 28.
[0030] In one embodiment provided by the present utility model, Figure 2 and Figure 3 As shown, a cleaning brush 23 is arranged on the outer wall of the top of the limiting fixing plate 22 , and a filter screen 28 is arranged on the inner wall of the housing 1 . The rotating rod 18 drives the cleaning brush 23 to rotate, thereby realizing the cleaning function of the filter screen 28 .
[0031] In another embodiment provided by the present utility model, Figure 1 and Figure 2 As shown, a manual lever 26 is provided on the outer wall of the top of the trapezoidal slider 8, and an insulating sleeve 29 is sleeved on one end of the manual lever 26. The insulating sleeve 29 drives the manual lever 26 to move, thereby solving the function of manually closing the pressure switch.
[0032] In another embodiment provided by the present utility model, Figure 1 and Figure 2 As shown, a sealing cover 2 is provided on the top of the shell 1, and a glass 25 is provided on the front side of the shell 1. Fixed ears 27 are provided on both sides of the shell 1. The fixed ears 27 are fixed on the pipeline to achieve the function of fixing the fixed ears 27.
[0033] Working principle: when in use, fix the fixed hanging ear 27 on the outer wall of the pipe, connect the wire to the access end 15 and the access end 16, and the water flows into the shell 1 through the water inlet hole 17. The water flow drives the fan 19 to rotate, and the fan 19 drives the rotating rod 18 to rotate, and the rotating rod 18 drives the cleaning rod 20 to rotate, and the cleaning rod 20 drives the cleaning brush 23 to rotate, thereby realizing the function of cleaning the filter 28, and solving the problem that the sediment accumulates in the shell 1 and affects the delay function of the pressure switch. The limiter housing 21 drives the limit spring 24 to move, and the limit spring 24 provides elastic force to provide elastic force to the limit fixing plate 22, and the limit fixing plate 22 squeezes the cleaning brush 23, thereby realizing the function of the cleaning brush 23 and the filter 28 being fitted and fixed, and solving the problem that there is a gap during cleaning, which causes poor cleaning. The water flows through the filter 28, and the buoyancy board 3 rises under the action of the water pressure, and the buoyancy board 3 3 drives the support rod 4 to move, the support rod 4 drives the rotating wheel 7 to move, the rotating wheel 7 contacts and moves with the trapezoidal slider 8, the trapezoidal slider 8 moves and squeezes the return spring 11, the trapezoidal slider 8 drives the conductive rod 9 to move, the conductive rod 9 drives the conductive seat 10 to move, the conductive seat 10 fits with the contact plate 12, the contact plate 12 squeezes the conductive spring 13, and a passage is realized. When the water pressure is unstable, the conductive spring 13 provides elastic force for the contact plate 12 to always contact the conductive seat 10. When the water pressure drops, the buoyancy plate 3 drops, and the return spring 11 provides elastic force to move the trapezoidal slider 8, the conductive spring 13 restores its shape length, and the contact plate 12 at one end of the conductive spring 13 finally separates from the conductive seat 10, realizing the function of delaying the pressure switch, solving the problem of electrical appliance burning caused by frequent start and stop, and when emergency stop is required, the manual lever 26 is pulled by contacting the insulating sleeve 29 to realize the function of manual emergency stop.
[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A pressure switch with a time delay function, comprising a housing (1) and a sealing cover (2), characterized in that: The shell (1) is slidably connected to a buoyancy plate (3) inside, and a support rod (4) is arranged on the outer wall of the top of the buoyancy plate (3), one end of the support rod (4) is rotatably connected to a rotating wheel (7) via a bearing, a sliding groove (6) is provided on the inner wall of the shell (1), and a sealing ring (5) is arranged inside the sliding groove (6), the outer wall of the support rod (4) is connected to the sealing ring (5), a trapezoidal slider (8) is slidably connected to the outer wall of the top of the shell (1), and a conductive rod (9) is welded to the outer wall of one side of the trapezoidal slider (8), and the outer wall of ... An outlet terminal (16) is welded to the outer wall at the top of the trapezoidal slider (8), a conductive seat (10) is welded to one end of the conductive rod (9), and a return spring (11) is sleeved on the outer wall of the conductive rod (9), a conductive block (14) is arranged on the outer wall at the top of the shell (1), and an access terminal (15) is welded to the outer wall at the top of the conductive block (14), a contact plate (12) is slidably connected to the outer wall at the top of the shell (1), and a conductive spring (13) is connected between the outer wall on one side of the conductive block (14) and the outer wall on one side of the contact plate (12).
2. The pressure switch with delay function according to claim 1, characterized in that: A water inlet hole (17) is provided on the outer wall of the bottom of the shell (1), and a rotating rod (18) is rotatably connected to the inner wall of the bottom of the shell (1) via a bearing.
3. The pressure switch with delay function according to claim 2, characterized in that: A fan (19) and a cleaning rod (20) are welded on the outer wall of the rotating rod (18) in sequence from bottom to top, and a limiter housing (21) is arranged on the outer wall at the top of the cleaning rod (20).
4. The pressure switch with delay function according to claim 3, characterized in that: The interior of the limiter housing (21) is slidably connected to the limit fixing plate (22), and a limit spring (24) is connected between the interior of the limiter housing (21) and the outer wall at the bottom of the limit fixing plate (22).
5. The pressure switch with delay function according to claim 4, characterized in that: A cleaning brush (23) is arranged on the outer wall of the top of the limiting fixing plate (22), and a filter screen (28) is arranged on the inner wall of the shell (1).
6. The pressure switch with delay function according to claim 5, characterized in that: A manual lever (26) is provided on the outer wall of the top of the trapezoidal sliding block (8), and one end of the manual lever (26) is sleeved with an insulating sleeve (29).
7. The pressure switch with delay function according to claim 6, characterized in that: A sealing cover (2) is provided on the top of the shell (1), a glass (25) is provided on the front side of the shell (1), and fixing ears (27) are provided on both sides of the shell (1).