An adjustable high-precision nuclear-grade pressure switch

Abstract

The present invention discloses an adjustable high-precision nuclear-grade pressure switch, which belongs to the technical field of pressure switches and includes: a pressure switch, which is connected to a pipeline through a threaded interface; a sensing component, which is connected to the end of the threaded interface away from the pipeline; an auxiliary sensing component, which is connected to the sensing component; an automatic adjustment component, which is slidably connected to the inside of the threaded interface, one end of which is fixedly connected to a filter screen, and the other end of which is rotatably connected to the surface of the sensing component through a one-way component. In the present invention, a filter screen is installed inside the threaded interface of the pressure switch, and the filter screen can physically intercept pollutants in the fluid medium to prevent these impurities from clogging the spring tube and interfering with the action of the pressure switch. At the same time, the sliding rod will pull the filter screen to periodically vibrate upward in the threaded interface, which can shake off impurities and dust on the surface of the filter screen and automatically adjust the accuracy of the pressure switch, thereby protecting, stabilizing and extending the life of the pressure switch.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure switches, and in particular to an adjustable high-precision nuclear-grade pressure switch. Background Art

[0002] Nuclear-grade pressure switches are critical safety devices used in nuclear power plants or other nuclear facilities to monitor and control the pressure of fluids (such as coolant, steam or gas) to ensure that the system operates within a safe range.

[0003] Current nuclear-grade pressure switches on the market suffer from several drawbacks: Because the monitored fluid often contains unreacted substances, catalysts, and impurity particles, these impurities accumulate on the surface or in the gaps between the pressure sensing elements, causing mechanical hysteresis or jamming, making it unable to accurately respond to pressure changes. Therefore, an adjustable, high-precision nuclear-grade pressure switch is needed to address these issues. Summary of the Invention

[0004] In view of the deficiencies in the prior art, an embodiment of the present invention aims to provide an adjustable high-precision nuclear-grade pressure switch to solve the problems in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An adjustable high-precision nuclear-grade pressure switch includes: a pressure switch connected to a pipeline via a threaded interface, with a display screen and a dial installed on both sides of the pressure switch, and a filter installed inside the threaded interface;

[0007] The sensing component has one end connected to the end of the threaded interface away from the pipeline, and the other end is rotatably connected to the pressure switch through the indicating component, and is used to cooperate with the indicating component to monitor the internal pressure of the pipeline;

[0008] An auxiliary sensing component is connected to the sensing component and is used to rotate under the action of the sensing component to assist in monitoring the pressure inside the pipeline;

[0009] The automatic adjustment component is slidably connected to the inside of the threaded interface. One end is fixedly connected to the filter screen, and the other end is connected to the surface of the sensing component through a one-way component. When the sensing component rotates, the automatic adjustment component absorbs deformation.

[0010] Kinetic energy causes the filter to move inside the threaded interface, automatically cleaning the dust on the filter surface and automatically adjusting the accuracy of the pressure switch.

[0011] As a preferred technical solution of the present invention, the sensing component includes: a spring tube, whose end is connected to the side of the threaded interface; a rotating shaft, which is rotatably connected to the inside of the pressure switch and has a fan gear installed on the surface; an extension frame, one end of which is connected to the fan gear and the other end is hinged to the end of the spring tube through a connecting rod; a rotating rod, which is rotatably connected to the center of the pressure switch and has a rotating rod gear installed on the surface of one end, and the rotating rod gear and the fan gear are meshed and connected.

[0012] As a preferred technical solution of the present invention, the spring tube is elliptical.

[0013] As a preferred technical solution of the present invention, the indicating assembly includes: an L-shaped frame, fixed to the end of the rotating rod away from the rotating rod gear, and the other side of the L-shaped frame is rotatably connected to the rotating rod; a bracket, fixed to the inner wall of the pressure switch, and a face gear is fixed to the end; a rotating rod gear, installed at one end of the rotating rod, and the rotating rod gear and the face gear are meshed and connected; a multi-faceted indicating tube, fixed to the end of the rotating rod away from the rotating rod gear.

[0014] As a preferred technical solution of the present invention, the auxiliary sensing component includes: a C-type resistor, fixed to the side of the pressure switch away from the L-shaped frame; a conductor frame, fixed to the surface of the rotating rod, and the side of the conductor frame is slidably connected to the surface of the C-type resistor; a controller, fixed to the inner wall of the pressure switch, and the controller is connected to the end of the C-type resistor and the end of the conductor frame through wires.

[0015] As a preferred technical solution of the present invention, the automatic adjustment component includes: a reducing wheel, which is rotatably connected to the surface of the rotating rod through a one-way component, and a dislocation groove is provided on the reducing wheel; a sliding rod, one end of which is slidably connected to the inside of the threaded interface, and the other end is fixed with a support frame; a roller, which is rotatably connected to the end of the support frame, and the roller surface and the reducing wheel are rollingly connected; an elastic member, which is connected between the support frame and the threaded interface.

[0016] As a preferred technical solution of the present invention, the one-way component includes: a fixed block connected to the surface of the rotating rod, a pawl is rotatably connected to the fixed block, and the pawl is connected to the surface of the rotating rod through a pawl spring; a pawl groove is opened on the variable diameter wheel, and the end of the pawl is engaged and connected to the inside of the pawl groove.

[0017] Compared with the prior art, the embodiments of the present invention have the following advantages: when the pressure switch of the present invention is in use, the multi-faceted indicator tube rotates and rotates on the surface of the dial, thereby converting the pressure change inside the pipeline into an obvious rotation angle and color change of the multi-faceted indicator tube on the dial, providing a multi-channel method for reading the pressure value of the pressure switch, and the methods of reading the internal pressure of the pipeline by the dial and the display screen can verify each other, preventing the normal monitoring of the pipeline from being affected by damage to a certain reading method.

[0018] The threaded interface of the pressure switch in this invention incorporates a filter screen that physically intercepts contaminants in the fluid medium, preventing them from clogging the spring tube and interfering with the pressure switch's operation. Simultaneously, a sliding rod pulls the filter screen, causing it to periodically vibrate upward within the threaded interface. This shakes off impurities and dust from the filter screen's surface and automatically adjusts the pressure switch's accuracy, protecting, stabilizing, and extending the pressure switch's lifespan.

[0019] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic diagram of the overall structure of an adjustable high-precision nuclear-grade pressure switch provided by an embodiment of the present invention.

[0021] FIG2 is a schematic structural diagram of an indicator assembly of an adjustable high-precision nuclear-grade pressure switch provided by an embodiment of the present invention.

[0022] FIG3 is a front view of one side of an adjustable high-precision nuclear-grade pressure switch provided by an embodiment of the present invention.

[0023] FIG4 is a front view of the other side of the adjustable high-precision nuclear-grade pressure switch provided by an embodiment of the present invention.

[0024] FIG5 is a schematic structural diagram of the sensing assembly of the adjustable high-precision nuclear-grade pressure switch provided by an embodiment of the present invention.

[0025] Figure 6 is a partial enlarged view of part A in Figure 5.

[0026] FIG7 is a partial enlarged view of part B in FIG6.

[0027] FIG8 is a schematic diagram of the internal structure of a threaded interface provided in an embodiment of the present invention.

[0028] Figure numerals: 1. pressure switch; 10. display screen; 100. dial; 11. threaded interface; 111. filter; 12. pipeline; 2. sensing assembly; 21. spring tube; 22. rotating shaft; 23. sector gear; 24. extension frame; 25. connecting rod; 26. rotating rod; 27. rotating rod gear; 3. indication assembly; 31. L-shaped frame; 32. bracket; 33. face gear; 34. rotating rod; 35. rotating rod gear; 36. multi-faceted indicating tube; 4. auxiliary sensing assembly; 41. C-type rheostat; 42. conductor frame; 43. controller; 44. wire; 5. automatic adjustment assembly; 51. reducing wheel; 52. offset groove; 53. support frame; 54. roller; 55. slide rod; 56. elastic member; 6. one-way assembly; 61. fixing block; 62. pawl; 63. pawl groove. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0031] Referring to Figures 1 to 8, an adjustable high-precision nuclear-grade pressure switch comprises:

[0032] Pressure switch 1, which is connected to pipe 12 via threaded interface 11, and has display screen 10 and dial 100 installed on both sides of pressure switch 1, and filter screen 111 installed inside threaded interface 11;

[0033] The sensing component 2 has one end connected to the end of the threaded interface 11 away from the pipe 12, and the other end is rotatably connected to the pressure switch 1 through the indicating component 3, and is used to cooperate with the indicating component 3 to monitor the internal pressure of the pipe 12;

[0034] The auxiliary sensing component 4 is connected to the sensing component 2 and is used to rotate under the action of the sensing component 2 to assist in monitoring the pressure inside the pipeline 12;

[0035] The automatic adjustment component 5 is slidably connected to the inside of the threaded interface 11, one end of which is fixedly connected to the filter 111, and the other end of which is rotatably connected to the surface of the sensing component 2 through the one-way component 6. When the sensing component 2 rotates, the automatic adjustment component

[0036] The component 5 deforms to absorb kinetic energy, causing the filter 111 to move inside the threaded interface 11 , thereby automatically cleaning the dust on the surface of the filter 111 and automatically adjusting the accuracy of the pressure switch 1 .

[0037] In one embodiment of the present invention, as shown in FIG4 and FIG5 , the sensing component 2 includes:

[0038] The spring tube 21 has its end connected to the side of the threaded interface 11;

[0039] The rotating shaft 22 is rotatably connected to the inside of the pressure switch 1 and has a sector gear 23 mounted on its surface;

[0040] An extension frame 24 has one end connected to the sector gear 23 and the other end hinged to the end of the spring tube 21 via a connecting rod 25;

[0041] The rotating rod 26 is rotatably connected to the center of the pressure switch 1 , and a rotating rod gear 27 is mounted on one end surface. The rotating rod gear 27 is meshed with the sector gear 23 .

[0042] In this embodiment, when installing the pressure switch 1, the threaded connector 11 is rotated into the interior of the pipe 12 to secure the pressure switch 1. When the pressure switch 1 is in use, the gas, liquid, or other medium inside the pipe 12 enters the interior of the spring tube 21 through the threaded connector 11. When pressure is applied to the interior of the spring tube 21, due to the elliptical shape of the spring tube 21, the internal pressure generates a force that tends to round the wall of the spring tube 21. This force causes the curved spring tube 21 to elastically deform, causing it to attempt to straighten.

[0043] When the free end of the spring tube 21 is displaced due to this straightening tendency, the free end of the spring tube 21 drives the connecting rod 25 to move. The connecting rod 25 is connected to the extension frame 24, so that the sector gear 23 drives the rotating shaft 22 to rotate on the pressure switch 1. The sector gear 23 can drive the rotating rod 26 to rotate on the pressure switch 1 through the rotating rod gear 27, so that the rotating rod 26 can drive the indicating assembly 3 on the other side of the pressure switch 1 to rotate, so that the position indicated by the indicating assembly 3 on the dial 100 directly corresponds to the pressure value inside the pipe 12.

[0044] In one embodiment of the present invention, as shown in FIG2 and FIG3 , the indicating component 3 includes:

[0045] An L-shaped frame 31 is fixed to the end of the rotating rod 26 away from the rotating rod gear 27, and the other side of the L-shaped frame 31 is rotatably connected to the rotating rod 34;

[0046] The bracket 32 ​​is fixed to the inner wall of the pressure switch 1, and a face gear 33 is fixed to the end thereof;

[0047] The rotating rod gear 35 is mounted on one end of the rotating rod 34 and is meshed with the face gear 33;

[0048] The multi-faceted indicator tube 36 is fixed to the end of the rotating rod 34 away from the rotating rod gear 35.

[0049] In this embodiment, when the rotating rod 26 rotates within the pressure switch 1, the rotating rod 26 drives the L-shaped frame 31 at its end to rotate synchronously, so that the L-shaped frame 31 drives the rotating rod gear 35 and the multi-faceted indicator tube 36 at both ends of the rotating rod 34 to rotate respectively.

[0050] Because rotating rod gear 35 rotates around the center of face gear 33, face gear 33 and rotating rod gear 35 are constantly meshed. Consequently, under the action of face gear 33, rotating rod gear 35 drives rotating rod 34 on L-shaped frame 31, which in turn drives multi-faceted indicator tube 36 on its surface to rotate. Multi-faceted indicator tube 36 is radially symmetrical, with each side having the same structure and a different color. Therefore, as multi-faceted indicator tube 36 rotates on the surface of dial 100, the position and color changes of multi-faceted indicator tube 36 provide multiple readings of the pressure value detected by pressure switch 1.

[0051] In one embodiment of the present invention, as shown in FIG5 and FIG6, the auxiliary sensing component 4 includes:

[0052] A C-type rheostat 41 is fixed to the side of the pressure switch 1 away from the L-shaped frame 31;

[0053] The conductor frame 42 is fixed on the surface of the rotating rod 26, and the side of the conductor frame 42 is slidably connected to the surface of the C-type resistor 41;

[0054] The controller 43 is fixed on the inner wall of the pressure switch 1 and is connected to the end of the C-type resistor 41 and the end of the conductor frame 42 through the wire 44.

[0055] In this embodiment, a conductive frame 42 and a C-type varistor 41 are connected to a complete circuit via wires 44 and a controller 43, respectively. The controller 43 is electrically connected to a microbattery. When the rotating rod 26 rotates within the pressure switch 1, it drives the conductive frame 42 to slide across the surface of the C-type varistor 41. As the conductive frame 42 slides across the surface of the C-type varistor 41, the resistance of the C-type varistor 41 in the circuit gradually changes, causing the current in the circuit to change accordingly. This current change is transmitted to the controller 43, which then transmits the current change to the display 10. The pressure value within the pipe 12 can be read through the display 10 on the surface of the pressure switch 1. When the controller 43 senses that the current change has reached a set upper (or lower) limit, it controls the alarm via an electrical signal to sound an alarm, thereby protecting the equipment and system. The ways in which the dial 100 and the display screen 10 read the internal pressure of the pipeline 12 can verify each other, thereby preventing the normal monitoring of the pipeline 12 from being affected due to damage to one reading method.

[0056] In one embodiment of the present invention, as shown in FIG6 and FIG8 , the automatic adjustment component 5 includes:

[0057] The variable diameter wheel 51 is rotatably connected to the surface of the rotating rod 26 through the one-way component 6, and the variable diameter wheel 51 is provided with an offset groove 52;

[0058] A slide rod 55, one end of which is slidably connected to the inside of the threaded interface 11, and the other end of which is fixed to the support frame 53;

[0059] The roller 54 is rotatably connected to the end of the support frame 53, and the surface of the roller 54 is in rolling connection with the reducing wheel 51;

[0060] The elastic member 56 is connected between the support frame 53 and the threaded interface 11.

[0061] In this embodiment, a filter screen 111 is installed inside the threaded interface 11. The filter screen 111 can physically intercept contaminants in the fluid medium, preventing these impurities from clogging the spring tube 21 and interfering with the operation of the pressure switch 1, ensuring that the pressure switch 1 can operate reliably, accurately, and stably, and extending the service life of the pressure switch 1.

[0062] When the rotating rod 26 rotates, it can drive the reducing wheel 51 to rotate counterclockwise through the one-way component 6, causing the reducing wheel 51 to roll on the surface of the roller 54. Under the pressure of the reducing wheel 51, the roller 54 pushes the slide rod 55 to slide downward in the threaded interface 11 through the support frame 53. When the support frame 53 slides downward, it compresses the elastic member 56, and at the same time, the slide rod 55 drives the filter screen 111 to slide downward inside the threaded interface 11.

[0063] When the roller 54 rolls to the position of the dislocation groove 52 on the surface of the reducing wheel 51, the support frame 53 will pull the slide rod 55 to vibrate upward in the threaded interface 11 under the elastic force of the elastic member 56, so that the slide rod 55 pulls the filter 111 to vibrate upward inside the threaded interface 11. When the reducing wheel 51 continues to rotate counterclockwise, the filter 111 will slide downward inside the threaded interface 11 again. This cycle causes the filter 111 to periodically vibrate upward in the threaded interface 11, which can shake off impurities and dust on the surface of the filter 111, thereby automatically adjusting the accuracy of the pressure switch 1, thereby protecting, stabilizing and extending the life of the pressure switch 1.

[0064] In one embodiment of the present invention, as shown in FIG6 and FIG7 , the one-way component 6 includes:

[0065] A fixed block 61 is connected to the surface of the rotating rod 26. A pawl 62 is rotatably connected to the fixed block 61. The pawl 62 is connected to the surface of the rotating rod 26 via a pawl spring.

[0066] The pawl groove 63 is formed on the diameter-changing wheel 51 , and the end of the pawl 62 is engaged with the inside of the pawl groove 63 .

[0067] In this embodiment, when the rotating rod 26 rotates counterclockwise on the pressure switch 1, the pawl 62 is engaged in the pawl groove 63 under the action of the pawl spring, and the rotating rod 26 can drive the fixed block 61 to rotate. The fixed block 61 can drive the variable diameter wheel 51 to rotate counterclockwise synchronously through the connection between the pawl 62 and the pawl groove 63; when the rotating rod 26 rotates clockwise on the pressure switch 1, the pawl 62 will compress the pawl spring under the pressure of the pawl groove 63, so that the rotating rod 26 will not drive the variable diameter wheel 51 to rotate clockwise, thereby preventing the offset groove 52 and the roller 54 from interfering when the rotating rod 26 rotates clockwise.

[0068] The operating principle of the present invention is as follows: When the pressure switch 1 is in use, the free end of the spring tube 21 tends to straighten, causing the multi-faceted indicator tube 36 to rotate on the surface of the dial 100. This allows for multiple readings of the pressure value detected by the pressure switch 1, based on the position and color changes of the multi-faceted indicator tube 36. Rotating the rotating rod 26 within the pressure switch 1 drives the conductor frame 42 to slide across the surface of the C-type variable resistor 41. When the controller 43 senses the current change and reaches a set upper (or lower) limit, it controls the alarm via an electrical signal to sound an alarm, thereby protecting the equipment and system. The pressure readings of the dial 100 and the display 10, respectively, can be mutually verified, preventing damage to one reading method from affecting proper monitoring of the pipeline 12.

[0069] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or mutual communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An adjustable high-precision nuclear-grade pressure switch, characterized in that: The adjustable high-precision nuclear-grade pressure switch comprises: A pressure switch (1) is connected to a pipe (12) via a threaded interface (11), and a display screen (10) and a dial (100) are respectively installed on both sides of the pressure switch (1), and a filter (111) is installed inside the threaded interface (11); The sensing component (2) has one end connected to the end of the threaded interface (11) away from the pipe (12), and the other end is rotatably connected to the pressure switch (1) through the indicating component (3), and is used to cooperate with the indicating component (3) to realize monitoring of the internal pressure of the pipe (12). The indicating component (3) includes: an L-shaped frame (31) fixed to the end of the rotating rod (26) away from the rotating rod gear (27), and the other side of the L-shaped frame (31) is rotatably connected to the rotating rod (34); a bracket (32) fixed to the inner wall of the pressure switch (1), and a face gear (33) fixed to the end; a rotating rod gear (35) installed at one end of the rotating rod (34), and the rotating rod gear (35) and the face gear (33) are meshed and connected; a multi-faceted indicating tube (36) fixed to the end of the rotating rod (34) away from the rotating rod gear (35); An auxiliary sensing component (4) is connected to the sensing component (2) and is used to rotate under the action of the sensing component (2) to assist in monitoring the pressure inside the pipeline (12). The auxiliary sensing component (4) includes: a C-type rheostat (41) fixed to the side of the pressure switch (1) away from the L-shaped frame (31); a conductor frame (42) fixed to the surface of the rotating rod (26), and the side of the conductor frame (42) is slidably connected to the surface of the C-type rheostat (41); a controller (43) fixed to the inner wall of the pressure switch (1), and the controller (43) is respectively connected to the end of the C-type rheostat (41) and the end of the conductor frame (42) through a wire (44); The automatic adjustment component (5) is slidably connected to the interior of the threaded interface (11), one end of which is fixedly connected to the filter (111), and the other end of which is rotationally connected to the surface of the sensing component (2) via the one-way component (6). When the sensing component (2) rotates, the automatic adjustment component (5) deforms to absorb kinetic energy, causing the filter (111) to move inside the threaded interface (11), thereby automatically cleaning the dust on the surface of the filter (111), thereby automatically adjusting the accuracy of the pressure switch (1).

2. The adjustable high-precision nuclear-grade pressure switch according to claim 1, characterized in that: The sensing component (2) comprises: A spring tube (21), the end of which is connected to the side of the threaded interface (11); A rotating shaft (22) is rotatably connected to the interior of the pressure switch (1) and has a sector gear (23) mounted on its surface; An extension frame (24) has one end connected to the sector gear (23) and the other end hinged to the end of the spring tube (21) via a connecting rod (25); The rotating rod (26) is rotatably connected to the center of the pressure switch (1), and a rotating rod gear (27) is installed on one end surface. The rotating rod gear (27) is meshed with the sector gear (23).

3. The adjustable high-precision nuclear-grade pressure switch according to claim 2, characterized in that: The spring tube (21) is oval.

4. The adjustable high-precision nuclear-grade pressure switch according to claim 2, characterized in that: The automatic adjustment component (5) comprises: A diameter-changing wheel (51) is rotatably connected to the surface of the rotating rod (26) via a one-way component (6), and a dislocation groove (52) is provided on the diameter-changing wheel (51); A slide rod (55) having one end slidably connected to the interior of the threaded interface (11) and a support frame (53) fixed to the other end; A roller (54) is rotatably connected to the end of the support frame (53), and a surface of the roller (54) is rollingly connected to the diameter-changing wheel (51); The elastic member (56) is connected between the support frame (53) and the threaded interface (11).

5. The adjustable high-precision nuclear-grade pressure switch according to claim 4, characterized in that: The one-way component (6) comprises: A fixed block (61) is connected to the surface of the rotating rod (26); a pawl (62) is rotatably connected to the fixed block (61); and the pawl (62) is connected to the surface of the rotating rod (26) via a pawl spring; The ratchet groove (63) is provided on the diameter-changing wheel (51), and the end of the ratchet (62) is engaged and connected inside the ratchet groove (63).

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