Pressure controller protection structure
By designing explosion-proof and balancing mechanisms, the airflow is stabilized and the core components are protected during pressure surges. This solves the problem of traditional pressure controllers being susceptible to minor airflow interference and component damage, and achieves stable operation and precise control of the pressure controller.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEILONGJIANG DUYIN INSTR CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-05-08
AI Technical Summary
Traditional pressure controllers are susceptible to minor airflow disturbances, leading to frequent operation, reduced control accuracy, and damage to internal components during sudden pressure changes, rendering them unable to function properly.
A pressure controller protection structure was designed, including an explosion-proof mechanism and a balancing mechanism. Through the grid, filter screen and piston assembly in the L-shaped tube, the airflow is stabilized and the core components are protected from damage when the pressure rises sharply.
It effectively stabilizes airflow, prevents pressure controllers from malfunctioning due to minor air pressure fluctuations or sudden changes, protects internal components, and ensures control accuracy and equipment safety.
Smart Images
Figure CN224217030U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of equipment protection structures, and in particular to a pressure controller protection structure. Background Technology
[0002] In the industrial control technology system, pressure controllers, with their precise pressure monitoring and regulation capabilities, have become a key component ensuring the safe and stable operation of refrigeration systems. As a safety protection and control component, pressure controllers can prevent excessively low intake pressure or excessively high exhaust pressure and are widely used in air conditioning, cold storage, cold chain logistics and other fields.
[0003] In the operation of traditional pressure controllers, minor airflow disturbances can cause them to operate frequently. Turbulent pulsations in the gas within the pipeline or pressure fluctuations caused by minor leaks in valves can cause the pressure controller to work repeatedly in a short period of time. This not only increases system energy consumption but also causes frequent opening and closing of the mechanical contacts inside the controller. Over time, this can lead to drift in the controller's pressure setpoint, decreased control accuracy, or even complete failure. In industrial production, equipment start-up and shutdown, rapid valve opening and closing, and system failures can all cause sudden pressure increases. For traditional pressure controllers, when the pressure change exceeds their rated tolerance range, the internal sensitive elements will be subjected to excessive stress. Once the core components are damaged, the pressure controller will be unable to properly sense the pressure signal and thus lose its control function.
[0004] In view of this, the present invention is proposed. Utility Model Content
[0005] The purpose of this utility model is to provide a pressure controller protection structure in order to solve the above-mentioned problems.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A pressure controller protection structure includes a pressure gauge for measuring control pressure, an explosion-proof mechanism at the bottom of the pressure gauge, the explosion-proof mechanism including a pipe for gas flow, a grid fixedly connected inside the pipe, a filter mechanism for balancing airflow velocity at the bottom of the pipe, the filter mechanism including a housing, a first filter screen fixedly connected inside the housing, a second filter screen movably connected to the bottom of the first filter screen, a balancing mechanism mounted on the surface of the housing, the balancing mechanism including an L-shaped tube, a piston movably connected inside the L-shaped tube, a valve assembly mounted on the top of the L-shaped tube, and a connecting mechanism at the bottom of the housing.
[0008] Preferably, the surface of the outer shell is provided with a sliding groove, and a lever is fixedly connected to the surface of the second filter screen. The lever slides in the sliding groove, and the sliding groove limits the position of the lever.
[0009] Preferably, the valve assembly includes a disc that slides on the inner wall of an L-shaped tube, a straight rod that is fixedly connected to the top of the disc, a hole that is opened inside the straight rod, and a locking block that is slidably connected through the hole.
[0010] Preferably, a spring is fixedly connected between the piston and the disc, and a protrusion for pressing the disc is provided on the top of the piston.
[0011] Preferably, a flow-blocking mesh is slidably connected to the bottom of the grid, and an inclined block is fixedly connected to the surface of the flow-blocking mesh, and the grid and the flow-blocking mesh are adapted to each other.
[0012] Preferably, the connecting mechanism includes an air inlet, the top of which is fixedly connected to a threaded block for reinforcement, and the bottom of the housing is fixedly connected to an elastic locking block for cushioning.
[0013] Preferably, the straight rod is in contact with the inclined block, the inclined block slides inside the pipe, and the first filter screen is adapted to the second filter screen.
[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:
[0015] When the equipment is in use, it is connected to the device under control through the air inlet and threaded block of the connecting mechanism to ensure a stable connection and good sealing. Then, it starts working. The gas enters the shell through the connecting mechanism and passes through the first and second filters for double flow stabilization. The lever block and the slide groove control the second filter to change the gas flow rate and maintain the flow stabilization effect. The stabilized gas enters the pipeline, passes through the grid and the flow-blocking net, and finally enters the pressure controller to detect the pressure data of the device, and then proceeds to the next step.
[0016] Under normal operating conditions, the pressure inside the pressure controller fluctuates, causing the internal components to operate frequently and making it impossible to achieve accurate values. This solution addresses this by continuously introducing airflow, which gradually increases the air pressure inside the L-shaped tube, pushing the piston upward against the spring's elasticity. During this movement, the piston compresses the spring, causing it to contract and deform. The spring, with its elastic restoring force, pushes the piston downward, expelling the gas stored in the L-shaped tube. This avoids abnormal pressure changes caused by minor air pressure fluctuations and ensures that the pressure controller will not malfunction due to fluctuating pressure.
[0017] When the shock wave of sudden pressure increase is transmitted along the equipment to the pressure controller, the piston inside the L-shaped tube moves upward under the push of high-pressure gas, overcoming the elastic resistance of the spring. The spring is gradually compressed. As the pressure continues to rise, the spring is compressed to its limit, and its deformation reaches its maximum. The protrusion on the top of the piston begins to directly squeeze the straight rod. The locking block breaks under pressure exceeding its bearing threshold. As the straight rod moves upward, its top end comes into close contact with the inclined block and generates thrust, causing the flow-blocking mesh fixedly connected to it to slide inside the pipe. The flow-blocking mesh and the grid gradually become misaligned from the initial overlapping ventilation state. Its ventilation holes are completely blocked by the flow-blocking mesh, cutting off the gas flow path in the pipe and preventing the pressure from suddenly exceeding its rated bearing range. The internal sensitive element bears excessive stress, the pressure controller is damaged and cannot properly sense the pressure signal, and thus loses its control function. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall design of this utility model;
[0019] Figure 2 This is a schematic diagram of the filter structure of this utility model;
[0020] Figure 3 This is a schematic diagram of the balancing structure of this utility model;
[0021] Figure 4 This is a schematic diagram of the valve structure of this utility model;
[0022] Figure 5 This is a schematic diagram of the explosion-proof structure of this utility model.
[0023] Legend:
[0024] 10. Pressure gauge;
[0025] 20. Filtering mechanism; 21. Housing; 22. First filter screen; 23. Second filter screen; 24. Slide groove; 25. Pulley;
[0026] 30. Balancing mechanism; 31. L-shaped tube; 32. Piston; 33. Spring; 34. Valve assembly; 341. Disc; 342. Straight rod; 343. Hole; 344. Locking block;
[0027] 40. Explosion-proof mechanism; 41. Pipeline; 42. Grid; 43. Inclined block; 44. Flow barrier;
[0028] 50. Connecting mechanism; 51. Air inlet; 52. Threaded block; 53. Elastic locking block. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] like Figure 1 - Figure 5 As shown, this utility model provides:
[0031] A pressure controller protection structure includes a pressure gauge 10 for measuring control pressure. An explosion-proof mechanism 40 is provided at the bottom of the pressure gauge 10. The explosion-proof mechanism 40 includes a pipe 41 for gas flow. A grid 42 is fixedly connected inside the pipe 41. A filter mechanism 20 for balancing airflow velocity is provided at the bottom of the pipe 41. The filter mechanism 20 includes a housing 21. A first filter screen 22 is fixedly connected inside the housing 21. A second filter screen 23 is movably connected to the bottom of the first filter screen 22. A balancing mechanism 30 is installed on the surface of the housing 21. The balancing mechanism 30 includes an L-shaped tube 31. A piston 32 is movably connected inside the L-shaped tube 31. A valve assembly 34 is installed at the top of the L-shaped tube 31. A connecting mechanism 50 is provided at the bottom of the housing 21.
[0032] This solution incorporates a balancing mechanism 30. When the system pressure suddenly increases, airflow enters the L-shaped tube 31 through the pipe 41. As airflow continues to flow in, the air pressure inside the L-shaped tube 31 gradually increases, pushing the piston 32 to overcome the elastic force of the spring 33 and move upward. During the movement, the piston 32 compresses the spring 33, causing it to contract and deform, storing excess gas inside the L-shaped tube 31. This balances the airflow pressure inside the outer casing 21. After the operation is completed, the spring 33, with its own elastic restoring force, pushes the piston 32 downward, discharging the gas stored in the L-shaped tube 31 and eliminating the interference of small airflow fluctuations on the controller.
[0033] Specifically, such as Figure 2 As shown, a groove 24 is provided on the surface of the outer shell 21, and a lever 25 is fixedly connected to the surface of the second filter screen 23. The lever 25 slides in the groove 24, and the groove 24 limits the lever 25.
[0034] By designing the lever 25 to slide along the groove 24, the aperture of the second filter screen 23 and the first filter screen 22 can be controlled, so that the chaotic airflow enters the pressure gauge 10 stably and prevents the pressure gauge 10 from being damaged.
[0035] Specifically, such as Figure 3As shown, the valve assembly 34 includes a disc 341 that slides on the inner wall of the L-shaped tube 31. A straight rod 342 is fixedly connected to the top of the disc 341. A hole 343 is opened inside the straight rod 342, and a locking block 344 is slidably connected through the hole 343.
[0036] As an overload protection "fuse", the card block 344 will break first when the system pressure rises sharply and exceeds the threshold, so as to prevent the core components from being damaged due to overpressure, limit the fault to replaceable local parts, and reduce maintenance costs.
[0037] Specifically, such as Figure 4 As shown, a spring 33 is fixedly connected between the piston 32 and the disk 341, and a protrusion for pressing the disk 341 is provided on the top of the piston 32.
[0038] By setting spring 33, the piston 32 and the disc 341 play a buffering role. When the pressure is too high, the protection device of the equipment will be triggered to prevent the block 344 from breaking due to a small airflow.
[0039] Specifically, such as Figure 5 As shown, a flow-blocking mesh 44 is slidably connected to the bottom of the grid 42, and an inclined block 43 is fixedly connected to the surface of the flow-blocking mesh 44. The grid 42 and the flow-blocking mesh 44 are adapted to each other.
[0040] When the system pressure rises sharply, the inclined block 43 is pushed by the straight rod 342, causing the flow-blocking net 44 to slide, making it completely misaligned with the grid 42, thus completely cutting off the passage of the pipeline 41, preventing high-pressure gas from impacting the pressure gauge 10 or downstream equipment, and avoiding safety accidents such as pipeline rupture.
[0041] Specifically, such as Figure 2 As shown, the connecting mechanism 50 includes an air inlet 51, a threaded block 52 for reinforcement is fixedly connected to the top of the air inlet 51, and an elastic locking block 53 for buffering is fixedly connected to the bottom of the housing 21.
[0042] The threaded block 52 can form a high-strength mechanical engagement with the threaded interface of the pipe. When used with sealing tape or sealing ring, it can effectively prevent gas leakage and ensure the connection sealing under high pressure conditions. The elastic block 53 is made of rubber or spring steel. When installed, it is inserted into the connection groove of the device to be controlled. It can absorb the vibration energy of the equipment during operation, reduce the impact of vibration on the pressure gauge 10 and internal precision components, and avoid measurement errors or loosening of parts due to resonance.
[0043] Specifically, such as Figure 3 As shown, the straight rod 342 is in contact with the inclined block 43, the inclined block 43 slides inside the pipe 41, and the first filter screen 22 is adapted to the second filter screen 23.
[0044] The straight rod 342 is in contact with the inclined block 43. The inclined block 43 can be controlled by the straight rod 342, thereby controlling the entire explosion-proof mechanism 40. The first filter screen 22 and the second filter screen 23 are adapted to adjust the flow rate of gas entering the pressure gauge 10 according to the pressure change.
[0045] In use, the protective structure is first connected to the device under control via the air inlet 51 and threaded block 52 of the connecting mechanism 50. At the same time, the elastic locking block 53 acts as a buffer and reinforcement to ensure a stable connection and good sealing. After the start of operation, the gas enters the outer shell 21 through the connecting mechanism 50 and passes through the first filter screen 22 and the second filter screen 23 for double flow stabilization. The lever block 25, in conjunction with the slide groove 24, controls the second filter screen 23 to change the gas flow rate and maintain the flow stabilization effect. The filtered gas enters the pipeline 41 and finally enters the pressure controller.
[0046] Under normal operating conditions, the fluctuating pressure inside the pressure controller causes frequent operation of its internal components, making it impossible to achieve accurate values. This airflow enters the L-shaped tube 31 through pipe 41. As the airflow continues to flow in, the air pressure inside the L-shaped tube 31 gradually increases, pushing the piston 32 upward against the elastic force of the spring 33. During the movement, the piston 32 compresses the spring 33, causing it to contract and deform, storing excess gas in the L-shaped tube 31. The airflow pressure inside the outer casing 21 is then balanced. After the operation is completed, the spring 33, with its own elastic restoring force, pushes the piston 32 downward, discharging the gas stored in the L-shaped tube 31. This avoids abnormal pressure changes caused by minor air pressure fluctuations, ensuring that the pressure controller will not malfunction due to fluctuating pressure.
[0047] When the shock wave of sudden pressure increase is transmitted along the equipment to the pressure controller, the piston 32 in the L-shaped tube 31 moves upward under the push of high-pressure gas, overcoming the elastic resistance of the spring 33. The spring 33 is gradually compressed. As the pressure continues to rise, the spring 33 is compressed to its limit, and its deformation reaches its maximum. The protrusion on the top of the piston 32 begins to directly squeeze the straight rod 342. The locking block 344 breaks under pressure exceeding its bearing threshold. As the straight rod 342 moves upward, its top end comes into close contact with the inclined block 43 and generates a thrust, which drives the flow-blocking net 44 fixedly connected to it to slide inside the pipe 41. The flow-blocking net 44 and the grid 42 gradually become misaligned from the initial overlapping ventilation state. Its ventilation holes are completely blocked by the flow-blocking net, cutting off the gas flow path in the pipe 41 and preventing excessive gas pressure from damaging the equipment.
[0048] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A pressure controller protection structure, comprising a pressure gauge (10) for measuring control pressure, characterized in that, The pressure gauge (10) is provided with an explosion-proof mechanism (40) at the bottom. The explosion-proof mechanism (40) includes a pipe (41) for gas flow. A grid (42) is fixedly connected inside the pipe (41). A filter mechanism (20) for balancing airflow velocity is provided at the bottom of the pipe (41). The filter mechanism (20) includes a housing (21). A first filter screen (22) is fixedly connected inside the housing (21). A second filter screen (23) is movably connected to the bottom of the first filter screen (22). A balancing mechanism (30) is installed on the surface of the housing (21). The balancing mechanism (30) includes an L-shaped tube (31). A piston (32) is movably connected inside the L-shaped tube (31). A valve assembly (34) is installed on the top of the L-shaped tube (31). A connecting mechanism (50) is provided at the bottom of the housing (21).
2. The pressure controller protection structure according to claim 1, characterized in that, The surface of the outer shell (21) is provided with a sliding groove (24), and a lever (25) is fixedly connected to the surface of the second filter screen (23). The lever (25) slides in the sliding groove (24), and the sliding groove (24) limits the lever (25).
3. The pressure controller protection structure according to claim 1, characterized in that, The valve assembly (34) includes a disc (341) that slides on the inner wall of an L-shaped tube (31). A straight rod (342) is fixedly connected to the top of the disc (341). A hole (343) is provided inside the straight rod (342). A locking block (344) is slidably connected through the hole (343).
4. The pressure controller protection structure according to claim 3, characterized in that, A spring (33) is fixedly connected between the piston (32) and the disc (341), and a protrusion for pressing the disc (341) is provided on the top of the piston (32).
5. The pressure controller protection structure according to claim 3, characterized in that, The bottom of the grid (42) is slidably connected to a flow-blocking net (44), and the surface of the flow-blocking net (44) is fixedly connected to an inclined block (43). The grid (42) and the flow-blocking net (44) are compatible.
6. The pressure controller protection structure according to claim 1, characterized in that, The connecting mechanism (50) includes an air inlet (51), the top of which is fixedly connected to a threaded block (52) for reinforcement, and the bottom of the housing (21) is fixedly connected to an elastic locking block (53) for buffering.
7. The pressure controller protection structure according to claim 5, characterized in that, The straight rod (342) is in contact with the inclined block (43), the inclined block (43) slides inside the pipe (41), and the first filter screen (22) is adapted to the second filter screen (23).