High-precision pressure switch
By introducing the induction module and response module in the pressure switch, the micro -switch and driving parts are activated to achieve precise control of pipeline pressure, and the pressure switch in the existing technology cannot be accurately controlled when the pressure is exceeded or less than the rated value. Essence
Patent Information
- Application Number
- CN202421123043.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-22
AI Technical Summary
Existing pressure switches cannot be accurately controlled when the internal pressure of the pipe exceeds or is less than the rated value, which can easily lead to damage to the pipe.
Designed a high -precision pressure switch, which connects to the fluid pipeline by connecting the pipeline, and uses the induction module and response module to start the microcontrol switch and drive parts when the pressure value exceeds or less than the rated value, which drives the switching board valve to rotate to achieve the pipeline pipeline Pressure control.
The accuracy of pressure control is improved, and pressure control can be performed when the pressure exceeds or less than the rated value, reducing the risk of pipeline damage.
Smart Images
Figure CN222421779U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of pressure switches, and in particular to a high-precision pressure switch. Background Art
[0002] A pressure switch is a pressure control device. When the measured pressure reaches the rated value, the pressure switch can issue an alarm or control signal to achieve the purpose of controlling the pressure. It is widely used in the field of fluid pipelines.
[0003] In the related art, a pressure switch is designed, including a pressure sensitive element, a mechanical linkage mechanism, a micro switch, a driving member and a switch plate valve. The pressure switch is connected to the pipeline. The pressure sensitive element detects the pressure of the fluid inside the pipeline in real time. The switch plate valve is located in the pipeline. The driving member is connected to the switch plate valve to drive the switch plate valve to adjust the pipeline opening. When the fluid pressure exceeds the rated value, the sensing plate of the pressure sensitive element will be started, thereby driving the mechanical linkage mechanism to operate, and then driving the pressure plate of the micro switch to move, so that the normally open contact of the micro switch is closed, so that the driving member is energized, driving the switch plate valve to rotate, closing the pipeline, and then performing pressure control. When the input pressure is adjusted to the rated value, the pressure sensitive unit will be reset, thereby reopening the switch plate valve to maintain fluid circulation.
[0004] With respect to the above-mentioned related technologies, there are the following problems: for fluid pipelines, when the pressure at the input end of the fluid is too high or too low, the inside of the pipeline is affected by the input end, and the pressure will also maintain a corresponding state. If the pressure remains too high or too low for a long time, it is easy to cause damage to the pipeline. The above-mentioned pressure switch can only start the switch plate valve to control the internal pressure of the pipeline when the pressure inside the pipeline exceeds the rated value. When the internal pressure of the pipeline is less than the rated value, the switch plate valve cannot be driven, and the accuracy is poor, so it needs to be improved. Utility Model Content
[0005] In order to improve the accuracy of the pressure switch so that the pressure switch can perform pressure control when the pressure exceeds or is less than the rated value, the present application provides a high-precision pressure switch.
[0006] The high-precision pressure switch provided in this application adopts the following technical solution:
[0007] A high-precision pressure switch comprises a connection tube, a switch plate valve and a driving member, wherein the connection tube is communicated with a fluid pipeline, the switch plate valve is rotatably connected in the connection tube, the driving member is arranged outside the connection tube, the output end of the driving member is connected to the switch plate valve, a control box is arranged outside the connection tube, a micro switch is arranged in the control box, the driving member is electrically connected to the micro switch, a sensing module for detecting a pressure value is arranged in the connection tube, a response module is arranged in the control box, the sensing module is connected to the response module, so as to start the micro switch to control the switch plate valve when the pressure value exceeds or is less than the rated value.
[0008] By adopting the above technical solution, the connecting pipe is connected to the fluid pipeline, and the pressure value in the connecting pipe is the pressure value inside the reaction pipeline. When the pressure value exceeds or is less than the rated pressure value, the sensing module will sense the abnormality of the pressure value, thereby driving the micro switch and the driving member to start through the response module, so that the switch plate valve rotates, thereby isolating the connecting pipe from the fluid pipeline, so that the staff can adjust the pressure value at the input end to the rated value. At this time, the sensing module is reset, accompanied by the reset of the switch plate valve, thereby improving the accuracy of pressure control.
[0009] Optionally, the sensing module includes a limit block and a sensing plate, the limit block is connected between the connecting tube and the control box, a floating cavity for setting the sensing plate is opened in the limit block, the floating cavity connects the connecting tube and the control box, and when the pressure value is at the rated pressure, the sensing plate remains in the center of the floating cavity.
[0010] By adopting the above technical solution, at rated pressure, the sensor plate will remain in the center of the floating chamber. When the pressure value is greater than the rated pressure, the sensor plate will move toward the control box. When the pressure value is less than the rated pressure, the sensor plate will move toward the connection pipe. In the process of moving in both directions, the micro switch can be started through the response module, thereby driving the switch plate valve to rotate to control the pressure.
[0011] Optionally, the inner walls of the floating cavity close to the control box and the connecting tube are provided with balancing pieces, and the induction sheet abuts between the balancing pieces on both sides.
[0012] By adopting the above technical solution, setting a balance member can keep the sensor plate stable when the pressure value is at the rated value, thereby reducing the shaking amplitude of the sensor plate, and then preventing the spring plate of the micro switch from accidentally touching the normally open contact, causing abnormal rotation of the switch plate valve.
[0013] Optionally, the response module includes a driven rod, a first rotating wheel, a second rotating wheel and a push rod, the driven rod is connected to a side of the sensing plate facing the control box, the first rotating wheel and the second rotating wheel are rotatably connected to the inner wall of the control box, the first rotating wheel and the second rotating wheel are located on the same side of the driven rod, and the side walls of the first rotating wheel and the second rotating wheel close to each other are provided with tooth blocks, and the first rotating wheel and the second rotating wheel are meshed through the tooth blocks, and the side walls of the driven rod facing the first rotating wheel and the second rotating wheel are provided with fixed rods, and the peripheral walls of the first rotating wheel and the second rotating wheel facing the driven rod are provided with abutment rods, the abutment rods are located between the fixed rods on both sides, the abutment rods correspond to the fixed rods one by one, the abutment rods are abutted against the corresponding fixed rods, and the push rods are provided on the peripheral wall of the first rotating wheel, and the push rods are abutted against the spring sheet of the micro switch.
[0014] By adopting the above technical solution, when the sensing piece slides, it will drive the driven rod to slide. When the pressure in the connection pipe is too high, it indicates that the pressure inside the pipeline is also too high. At this time, under the action of the internal pressure of the connection pipe, the sensing piece will be squeezed toward the control box. At this time, the fixed rod corresponding to the second rotating wheel will push the abutting rod of the second rotating wheel to move, thereby driving the second rotating wheel to rotate. The first rotating wheel is driven to rotate through the meshing relationship between the second rotating wheel and the first rotating wheel, so that the push rod slides toward the spring sheet of the micro switch, thereby closing the normally open contact of the micro switch to rotate the switch plate valve; when the connection pipe is opened, the sensing piece will be pressed toward the control box. When the internal pressure is less than the rated value, the induction plate will move toward the connection pipe under the action of the air pressure in the control box, and the driven rod will move toward the connection pipe at the same time. At this time, the upper fixed rod will push the abutment rod of the first rotating wheel to move, thereby driving the first rotating wheel to rotate, so that the push rod slides toward the spring plate of the micro switch, and then the normally open contact of the micro switch is closed to rotate the switch plate valve. The above two methods can drive the switch plate valve to rotate regardless of whether the pressure value is too large or too low, so as to close and control the pressure of the pipeline. The structure is simple and easy to implement, making the effect of pipeline pressure control more accurate.
[0015] Optionally, a reset torsion spring is provided at the rotating connection between the first rotating wheel and the control box, one end of the reset torsion spring is connected to the first rotating wheel, and the other end of the reset torsion spring is connected to the inner wall of the control box. The reset torsion spring drives the first rotating wheel to drive the push rod to rotate in the direction of the spring sheet away from the micro switch.
[0016] By adopting the above technical solution, a reset torsion spring is provided to reset the first rotating wheel after it rotates, so that the normally open contact of the micro switch is disconnected, thereby facilitating the resetting of the switch plate valve and opening the fluid pipeline.
[0017] Optionally, a limit plate is provided in the control box, and one end of the driven rod away from the sensing plate passes through the limit plate.
[0018] By adopting the above technical solution, the existence of the limiting piece can make the driven rod slide in a straight line direction, thereby maintaining the stable operation of the sensing module and the response module of the present application.
[0019] Optionally, an abutment fillet is provided at one end of the push rod close to the micro switch spring sheet.
[0020] By adopting the above technical solution, setting the abutment fillet can effectively reduce the wear between the push rod and the micro switch spring sheet, thereby extending the service life.
[0021] Optionally, an anti-drop sheet is provided at the end of the spring sheet of the micro switch.
[0022] By adopting the above technical solution, the provision of an anti-slip sheet can effectively limit excessive rotation of the push rod, thereby ensuring the operating stability of the pressure switch of the present application.
[0023] In summary, the present application includes at least one of the following beneficial technical effects:
[0024] 1. Connect the connecting pipe to the fluid pipeline. The pressure value in the connecting pipe is the pressure value inside the reaction pipeline. When the pressure value exceeds or is less than the rated pressure value, the sensing module will sense the abnormal pressure value, and then drive the micro switch and the driving part to start through the response module, so that the switch plate valve rotates, thereby isolating the connecting pipe from the fluid pipeline, so that the staff can adjust the pressure value of the input end to the rated value;
[0025] 2. At rated pressure, the sensor plate will remain in the center of the floating chamber. When the pressure value is greater than the rated pressure, the sensor plate will move toward the control box. When the pressure value is less than the rated pressure, the sensor plate will move toward the connection pipe. During the movement in both directions, the micro switch can be started through the response module, thereby driving the switch plate valve to rotate to control the pressure. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a structural schematic diagram of a high-precision pressure switch in an embodiment of the present application.
[0027] Figure 2 It is a schematic diagram of the internal structure of the control box in the embodiment of the present application.
[0028] Explanation of the accompanying drawings: 1. connecting pipe; 2. switch plate valve; 3. driving member; 4. control box; 41. limit plate; 5. micro switch; 51. anti-drop plate; 6. sensing module; 61. limit block; 611. floating chamber; 612. balance member; 62. sensing plate; 7. response module; 71. driven rod; 711. fixed rod; 72. first rotating wheel; 73. second rotating wheel; 74. push rod; 741. abutment fillet; 75. tooth block; 76. abutment rod; 77. reset torsion spring. DETAILED DESCRIPTION
[0029] The following is combined with Figure 1-2 This application is described in further detail.
[0030] The present application embodiment discloses a high-precision pressure switch. Figure 1 , including a connecting pipe 1, a switch plate valve 2 and a driving member 3. The connecting pipe 1 is used to communicate with the fluid pipeline. The switch plate valve 2 is rotatably connected to the connecting pipe 1. The opening and closing of the connecting pipe 1 can be controlled by rotating the switch plate valve 2. The driving member 3 is arranged on the outer wall of the connecting pipe 1. In this embodiment, the driving member 3 is a small motor, and its output shaft is connected to the switch plate valve 2 to drive the switch plate valve 2 to rotate.
[0031] Reference Figure 1 The outer wall of the connecting pipe 1 is connected with a control box 4 by welding. A micro switch 5 is arranged in the control box 4. The micro switch 5 is electrically connected to the driving member 3. The micro switch 5 is in a normally open state. When the normally open contact is closed, the driving member 3 will start to drive the switch plate valve 2 to rotate. In the normally open state, the switch plate valve 2 remains in an open state to the connecting pipe 1.
[0032] Reference Figure 1A sensing module 6 is provided at the connection between the control box 4 and the connection pipe 1 for real-time detection of the pressure inside the connection pipe 1. The sensing module 6 includes a limit block 61 and a sensing sheet 62. The limit block 61 connects the control box 4 and the connection pipe 1. A floating cavity 611 for connecting the control box 4 and the connection pipe 1 is provided in the limit block 61. The sensing sheet 62 is slidably connected in the floating cavity 611. When the pressure value is at the rated pressure (in this embodiment, the rated pressure has a certain variable interval, and the rated pressure is within the interval), the sensing sheet 62 will always remain in the center of the floating cavity 611. When the pressure value is at the rated pressure (in this embodiment, the rated pressure has a certain variable interval, and the rated pressure is within the interval), the sensing sheet 62 will always remain in the center of the floating cavity 611. When the force value exceeds the rated pressure, the induction sheet 62 will move toward the control box 4 under the action of the internal pressure of the connection tube 1; when the pressure value is less than the rated pressure, the induction sheet 62 will move toward the connection tube 1 under the action of the air pressure in the control box 4; in this embodiment, the inner walls of the floating cavity 611 close to the control box 4 and the connection tube 1 are both connected by gluing with a balancing piece 612, and the induction sheet 62 abuts between the balancing pieces 612 on both sides. The balancing pieces 612 can use rubber pads to keep the induction sheet 62 stable under the rated pressure state, thereby reducing the probability of the micro switch 5 being accidentally touched.
[0033] Reference Figure 1 A response module 7 is arranged in the control box 4, and the response module 7 is controlled by the sensing module 6, so as to drive the switch plate valve 2 to rotate when the pressure value is too large or too small; the response module 7 comprises a driven rod 71, a first rotating wheel 72, a second rotating wheel 73 and a push rod 74, and the driven rod 71 is connected to the side of the sensing sheet 62 facing the control box 4 by welding, and a limiting plate 41 is arranged in the control box 4, and the end of the driven rod 71 away from the sensing sheet 62 passes through the limiting plate 41, so as to maintain the linear sliding of the driven rod 71 and the sensing sheet 62, and avoid the inclination of the sensing sheet 62, which causes the problem that the fluid in the connecting pipe 1 enters the control box 4.
[0034] Reference Figure 1 The first rotating wheel 72 and the second rotating wheel 73 are both rotatably connected to the inner wall of the control box 4, and the first rotating wheel 72 and the second rotating wheel 73 are located on the same side of the driven rod 71, and the peripheral walls of the first rotating wheel 72 and the second rotating wheel 73 close to each other are integrally formed with tooth blocks 75, and the first rotating wheel 72 and the second rotating wheel 73 are meshed through the tooth blocks 75; the side walls of the driven rod 71 facing the first rotating wheel 72 and the second rotating wheel 73 are connected with two fixed rods 711 by welding, and correspondingly, the peripheral walls of the first rotating wheel 72 and the second rotating wheel 73 facing the driven rod 71 are connected with abutment rods 76 by welding, and the abutment rods 76 are located between the fixed rods 711 on both sides, and the abutment rods 76 and the fixed rods 711 are arranged one by one, and the abutment rods 76 abut against the corresponding fixed rods 711.
[0035] Reference Figure 1 and Figure 2The push rod 74 is integrally formed on the peripheral wall of the first rotating wheel 72, and the push rod 74 abuts against the spring sheet of the microswitch 5. The end of the push rod 74 close to the microswitch 5 is provided with an abutting fillet 741 to reduce wear. The end of the spring sheet of the microswitch 5 is provided with an arc-shaped anti-dropping sheet 51 to limit the push rod 74. When the driven rod 71 moves, no matter what the moving direction is, it can drive the first rotating wheel 72 to rotate in the same direction, thereby realizing the tightening or loosening of the spring sheet of the microswitch 5, thereby controlling the opening and closing of the normally open contact and realizing the control of the switch plate valve 2; in this embodiment, a reset torsion spring 77 is provided at the connection between the first rotating wheel 72 and the inner wall of the control box 4, and one end force arm of the reset torsion spring 77 is connected to the first rotating wheel 72 by gluing, and the other end force arm is connected to the first rotating wheel 72 by gluing. Under the action of the reset torsion spring 77, the push rod 74 always maintains a rotation trend in the direction away from the spring sheet of the microswitch 5, so as to realize the reset after the response module 7 is started.
[0036] The implementation principle of a high-precision pressure switch in the embodiment of the present application is as follows: at the rated pressure, the sensing piece 62 will remain in the center of the floating chamber 611; when the pressure value is greater than the rated pressure, the sensing piece 62 will move toward the control box 4; when the sensing piece 62 slides, it will drive the driven rod 71 to slide; at this time, the fixed rod 711 corresponding to the second rotating wheel 73 will push the abutting rod 76 of the second rotating wheel 73 to move, thereby driving the second rotating wheel 73 to rotate; the first rotating wheel 72 is driven to rotate through the meshing relationship between the second rotating wheel 73 and the first rotating wheel 72, thereby causing the push rod 74 to slide toward the spring sheet of the micro switch 5, thereby causing the micro switch 5 to move. The normally open contact of the microswitch 5 is closed to rotate the switch plate valve 2; when the pressure value is less than the rated pressure, the sensing sheet 62 will move toward the connection pipe 1. At this time, the upper fixed rod 711 will push the abutment rod 76 of the first rotating wheel 72 to move, thereby driving the first rotating wheel 72 to rotate, so that the push rod 74 slides toward the spring sheet of the microswitch 5, and then the normally open contact of the microswitch 5 is closed to rotate the switch plate valve 2. The above two methods can drive the switch plate valve 2 to rotate, close the pipeline and control the pressure regardless of whether the pressure value is too large or too low. The structure is simple and easy to implement, making the effect of pipeline pressure control more accurate.
[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A high-precision pressure switch, characterized in that: The invention comprises a connection pipe (1), a switch plate valve (2) and a driving member (3), wherein the connection pipe (1) is communicated with a fluid pipeline, the switch plate valve (2) is rotatably connected to the connection pipe (1), the driving member (3) is arranged outside the connection pipe (1), the output end of the driving member (3) is connected to the switch plate valve (2), a control box (4) is arranged outside the connection pipe (1), a micro switch (5) is arranged inside the control box (4), the driving member (3) is electrically connected to the micro switch (5), a sensing module (6) for detecting a pressure value is arranged inside the connection pipe (1), a response module (7) is arranged inside the control box (4), the sensing module (6) is connected to the response module (7), and is used to start the micro switch (5) to control the switch plate valve (2) when the pressure value exceeds or is less than the rated value.
2. A high-precision pressure switch according to claim 1, characterized in that: The sensing module (6) comprises a limit block (61) and a sensing sheet (62); the limit block (61) is connected between the connection pipe (1) and the control box (4); a floating cavity (611) for the sensing sheet (62) to be arranged is provided in the limit block (61); the floating cavity (611) is connected to the connection pipe (1) and the control box (4); when the pressure value is at the rated pressure, the sensing sheet (62) is maintained at the center of the floating cavity (611).
3. A high-precision pressure switch according to claim 2, characterized in that: The inner walls of the floating chamber (611) close to the control box (4) and the connecting tube (1) are both provided with balancing pieces (612), and the induction sheet (62) is abutted between the balancing pieces (612) on both sides.
4. A high-precision pressure switch according to claim 2, characterized in that: The response module (7) comprises a driven rod (71), a first rotating wheel (72), a second rotating wheel (73) and a push rod (74); the driven rod (71) is connected to a side of the induction plate (62) facing the control box (4); the first rotating wheel (72) and the second rotating wheel (73) are rotatably connected to the inner wall of the control box (4); the first rotating wheel (72) and the second rotating wheel (73) are located on the same side of the driven rod (71); side walls of the first rotating wheel (72) and the second rotating wheel (73) close to each other are both provided with tooth blocks (75); the first rotating wheel (72) and the second rotating wheel (73) are meshed through the tooth blocks (75) The side wall of the driven rod (71) facing the first rotating wheel (72) and the second rotating wheel (73) is provided with a fixing rod (711); the peripheral wall of the first rotating wheel (72) and the second rotating wheel (73) facing the driven rod (71) is provided with an abutting rod (76); the abutting rod (76) is located between the fixing rods (711) on both sides; the abutting rod (76) and the fixing rod (711) correspond to each other one by one; the abutting rod (76) abuts against the corresponding fixing rod (711); the pushing rod (74) is provided on the peripheral wall of the first rotating wheel (72); the pushing rod (74) abuts against the spring sheet of the micro switch (5).
5. A high-precision pressure switch according to claim 4, characterized in that: A return torsion spring (77) is provided at the rotation connection between the first rotating wheel (72) and the control box (4); one end of the return torsion spring (77) is connected to the first rotating wheel (72), and the other end of the return torsion spring (77) is connected to the inner wall of the control box (4); the return torsion spring (77) drives the first rotating wheel (72) to drive the push rod (74) to rotate in the direction of the spring sheet away from the micro switch (5).
6. A high-precision pressure switch according to claim 4, characterized in that: A limit plate (41) is arranged in the control box (4), and one end of the driven rod (71) away from the sensing plate (62) passes through the limit plate (41).
7. A high-precision pressure switch according to claim 4, characterized in that: An abutment fillet (741) is provided at one end of the push rod (74) close to the spring sheet of the micro switch (5).
8. A high-precision pressure switch according to claim 4, characterized in that: An anti-drop sheet (51) is provided at the end of the spring sheet of the micro switch (5).