An impact-resistant nuclear-grade pressure switch with a diaphragm protection function

Abstract

The present invention belongs to the technical field of pressure switches, and in particular, to an impact-resistant nuclear-grade pressure switch with a diaphragm protection function. The present invention includes: a housing, one end of the housing is fixedly connected with an interface structure, and the other end of the housing is fixedly connected with a micro switch; an elastic diaphragm is connected at the interface of the housing, a push rod is fixedly connected to the elastic diaphragm, and one end of the push rod is connected with the micro switch; the interface structure includes a first connecting sleeve and a second connecting sleeve, the first connecting sleeve is fixedly connected with the housing, and an air outlet hole is provided in the first connecting sleeve; an elastic frame is fixedly connected to the surface of the first connecting sleeve, and a clamping seat cooperating with the elastic frame is fixedly connected to the surface of the second connecting sleeve; in the interface structure of the present invention, by providing the first connecting sleeve and the second connecting sleeve, when high-pressure gas impacts the elastic diaphragm, the first connecting sleeve and the second connecting sleeve will be automatically driven to separate, and the gas is released from the air outlet hole, reducing the impact on the elastic diaphragm.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure switches, and in particular to an impact-resistant nuclear-grade pressure switch with a diaphragm protection function. Background Art

[0002] A pressure switch is a device used to monitor pressure changes in a system or equipment. It usually triggers or disconnects a circuit when the preset pressure is reached to achieve automatic control or alarm. Among them, special pressure switches are also used in nuclear power plants. Such pressure switches are usually called nuclear-grade pressure-resistant switches and are used to monitor and control pressure changes in the system. For example, when used in a cooling system, it is to monitor the pressure changes in the cooling system to ensure the normal flow and circulation of the coolant in the system. Since the cooling system is one of the key systems in a nuclear power plant, the nuclear-grade pressure-resistant switch plays a crucial role in the cooling system.

[0003] Nuclear-grade pressure switches need to be applicable in a high-pressure environment. In a harsh and complex high-irradiation environment, the isolation diaphragm of a pressure switch using a diaphragm-type transmitter is easily damaged when subjected to a high-pressure shock wave, which affects the sensitivity of the pressure switch or damages the pressure switch, greatly shortening the service life of the pressure switch, thus causing limitations. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides an impact-resistant nuclear-grade pressure switch with a diaphragm protection function. It automatically opens for air release under high-pressure impact through an interface structure, overcoming the deficiency of diaphragm damage in the prior art, and aims to solve the problems in the background art.

[0005] To achieve the above technical purpose, the specific technical solution of the present invention is as follows. An impact-resistant nuclear-grade pressure switch with a diaphragm protection function proposed by the present invention includes: a housing, one end of the housing is fixedly connected with an interface structure, and the other end of the housing is fixedly connected with a microswitch; an elastic diaphragm is connected to the interface of the housing, a push rod is fixedly connected to the elastic diaphragm, and one end of the push rod is connected to the microswitch; the interface structure includes a first connecting sleeve and a second connecting sleeve. The first connecting sleeve is fixedly connected with the housing, and the first connecting sleeve and the second connecting sleeve are hermetically and movably connected, and an air outlet hole is provided in the first connecting sleeve; an elastic frame is fixedly connected to the surface of the first connecting sleeve, and a clamping seat cooperating with the elastic frame is fixedly connected to the surface of the second connecting sleeve.

[0006] As a preferred technical solution of the present invention, a clamping portion is fixedly connected to the elastic frame, a clamping groove cooperating with the clamping portion is provided on the clamping seat, and an inclined groove is provided on the surface of the elastic frame.

[0007] As a preferred technical solution of the present invention, a lifting rod is movably connected in the housing, a bracket is fixedly connected to the lower end of the lifting rod, and a sliding shaft slidably connected to the inclined groove is fixedly connected to the bracket.

[0008] As a preferred technical solution of the present invention, a lifting seat is slidably connected inside the housing, the lifting rod is fixedly connected to the lifting seat, a rotating member is rotatably connected inside the lifting seat, the rotating member is coaxially fixedly connected with a gear, and a rack meshing with the gear is fixedly connected to the top rod.

[0009] As a preferred technical solution of the present invention, the rotating member includes: a housing fixedly connected to the lifting seat; an internal gear ring fixedly connected inside the housing, a rotating frame is rotatably connected inside the internal gear ring, the rotating frame is coaxially fixedly connected with the gear; a card, connected to the periphery of the rotating frame, an arc-shaped groove cooperating with the rotating frame is provided inside the card, and a locking tooth capable of engaging with the internal gear ring is provided on the card.

[0010] As a preferred technical solution of the present invention, a friction plate in contact with the arc-shaped groove is fixedly connected to one end of the rotating frame.

[0011] As a preferred technical solution of the present invention, a stop frame is fixedly connected to the top inside the housing for limiting the lifting seat, and an elastic member is fixedly connected between the stop frame and the lifting seat.

[0012] As a preferred technical solution of the present invention, a sliding rod is fixedly connected to the card seat, the sliding rod is slidably connected to the elastic frame, and a cylindrical spring is connected to the surface of the sliding rod, and the cylindrical spring is arranged between the card seat and the elastic frame.

[0013] As a preferred technical solution of the present invention, an inner annular groove is provided on the inner surface of the first connecting sleeve, the air outlet hole is arranged in the inner annular groove, and an outer annular groove in sealing cooperation with the inner annular groove is provided on the outer surface of the second connecting sleeve.

[0014] As a preferred technical solution of the present invention, a sealing sheet is connected between the inner annular groove and the outer annular groove.

[0015] The beneficial effects in the present invention are as follows:

[0016] 1. In the present invention, when the elastic diaphragm is subjected to a high-pressure impact, the elastic diaphragm deforms instantaneously to drive the top rod to move rapidly, the top rod drives the lifting seat to rise, the lifting seat drives the lifting rod to rise, and when the lifting rod rises, it drives the elastic frame to bend outwards, so that the clamping part is separated from the clamping groove, thereby enabling the first connecting sleeve and the second connecting sleeve to be automatically separated, and the air outlet hole is opened, so that the high-pressure gas can be released from the air outlet hole, reducing the impact on the diaphragm.

[0017] 2. In the present invention, by connecting a stop frame above the lifting seat, the stop frame limits the lifting seat, and further limits the rising height of the top rod, avoiding serious deformation and damage of the diaphragm. Description of the Drawings

[0018] Figure 1Schematic structural diagram of an impact-resistant nuclear-grade pressure switch with a diaphragm protection function proposed by the present invention.

[0019] Figure 2 Schematic internal structure diagram of the housing proposed by the present invention.

[0020] Figure 3 Schematic structural diagram of the rotating member proposed by the present invention.

[0021] Figure 4 Schematic diagram of the interface structure proposed by the present invention.

[0022] Figure 5 Schematic structural diagram of the lifting rod proposed by the present invention.

[0023] In the figure: 1. Housing; 2. Interface structure; 21. First connecting sleeve; 22. Second connecting sleeve; 23. Inner annular groove; 24. Outer annular groove; 25. Elastic frame; 26. Card seat; 27. Card part; 28. Card slot; 29. Slide bar; 210. Cylindrical spring; 211. Air outlet hole; 212. Sealing piece; 213. Inclined groove; 3. Microswitch; 4. Lifting seat; 5. Rotating member; 501. Outer shell; 502. Inner gear ring; 503. Card; 504. Card teeth; 505. Arc groove; 506. Rotating frame; 507. Friction plate; 6. Gear; 7. Thumb rod; 8. Lifting rod; 801. Bracket; 802. Slide shaft; 9. Elastic diaphragm; 10. Rack; 11. Stop frame; 12. Elastic member. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0025] Embodiment: This embodiment discloses an impact-resistant nuclear-grade pressure switch with a diaphragm protection function, as Figures 1 - 5 shown, including: a housing 1, one end of the housing 1 is fixedly connected with an interface structure 2, the housing 1 is hermetically connected to a pipeline through the interface structure 2, the other end of the housing 1 is fixedly connected with a microswitch 3, and the microswitch 3 is a prior art, and its specific structure will not be described in detail; an elastic diaphragm 9 is hermetically connected to the interface of the housing 1, the elastic diaphragm 9 has a certain amount of deformation, the greater the pipeline air pressure, the greater the deformation of the elastic diaphragm 9, a thumb rod 7 is fixedly connected to the elastic diaphragm 9, one end of the thumb rod 7 is connected to the microswitch 3, and when the thumb rod 7 moves up and down, it can control the opening and closing of the microswitch 3.

[0026] As Figures 2 - 3As shown in the figure, a lifting seat 4 is slidably connected inside a housing 1. A rotating member 5 is rotatably connected inside the lifting seat 4. The rotating member 5 is coaxially and fixedly connected with a gear 6. The diameter of the gear 6 is much smaller than the diameter of the rotating member 5. A rack 10 meshing with the gear 6 is fixedly connected to a push rod 7. The rotating member 5 includes: a housing 501, and the housing 501 is fixedly connected with the lifting seat 4; an internal gear ring 502 is fixedly connected inside the housing 501. A rotating frame 506 is rotatably connected inside the internal gear ring 502. The rotating frame 506 is coaxially and fixedly connected with the gear 6; a card 503 is connected to the periphery of the rotating frame 506. An arc-shaped groove 505 cooperating with the rotating frame 506 is provided inside the card 503. One end of the rotating frame 506 contacts the arc-shaped groove 505. The distance between the arc-shaped groove 505 and the center of the circle gradually increases along the rotating direction, and a locking tooth 504 capable of engaging with the internal gear ring 502 is provided on the card 503. During specific implementation: when the elastic diaphragm 9 deforms instantaneously and drives the push rod 7 to rise instantaneously, the rack 10 drives the gear 6 to rotate at a high speed, driving the rotating frame 506 to rotate at a high speed. When the rotating frame 506 rotates at a high speed, relative sliding occurs between the rotating frame 506 and the card 503, causing the card 503 to shift. The locking tooth 504 on the card 503 engages with the internal gear ring 502, so that the rotating frame 506 cannot continue to rotate. Similarly, the gear 6 cannot rotate either. When the push rod 7 continues to rise, it will drive the entire lifting seat 4 to rise.

[0027] Preferably, a friction plate 507 contacting the arc-shaped groove 505 is fixedly connected to one end of the rotating frame 506, increasing the friction force between one end of the rotating frame 506 and the card 503. When the gear 6 rotates slowly and drives the rotating frame 506 to rotate slowly, the card 503 can be driven to rotate together; when the rotating frame 506 rotates instantaneously at a high speed, sliding will occur between the rotating frame 506 and the card 503.

[0028] Preferably, a stop frame 11 is fixedly connected to the top inside the housing 1 for limiting the lifting seat 4. An elastic member 12 is fixedly connected between the stop frame 11 and the lifting seat 4. By limiting the lifting seat 4 with the stop frame 11, it is avoided that the elastic diaphragm 9 is damaged due to excessive deformation.

[0029] As Figure 4As shown, the interface structure 2 includes a first connecting sleeve 21 and a second connecting sleeve 22. The first connecting sleeve 21 is fixedly connected to the housing 1, and the first connecting sleeve 21 and the second connecting sleeve 22 are hermetically and movably connected. Preferably, an inner annular groove 23 is provided on the inner surface of the first connecting sleeve 21, and an outer annular groove 24 that is hermetically fitted with the inner annular groove 23 is provided on the outer surface of the second connecting sleeve 22. An air outlet hole 211 is provided in the inner annular groove 23. When the first connecting sleeve 21 and the second connecting sleeve 22 are completely closed, the air outlet hole 211 is closed; when the first connecting sleeve 21 and the second connecting sleeve 22 are opened, the air outlet hole 211 is opened. An elastic frame 25 is fixedly connected to the surface of the first connecting sleeve 21, a clamping seat 26 that cooperates with the elastic frame 25 is fixedly connected to the surface of the second connecting sleeve 22, a clamping portion 27 is fixedly connected to the elastic frame 25, the clamping portion 27 is spherical, a clamping groove 28 that cooperates with the clamping portion 27 is provided on the clamping seat 26, and an inclined groove 213 is provided on the surface of the elastic frame 25.

[0030] Preferably, a sliding rod 29 is fixedly connected to the clamping seat 26. The sliding rod 29 is slidably connected to the elastic frame 25, and a cylindrical spring 210 is connected to the surface of the sliding rod 29. The cylindrical spring 210 is provided between the clamping seat 26 and the elastic frame 25, and the cylindrical spring 210 applies an elastic force to the clamping seat 26.

[0031] Preferably, a sealing piece 212 is connected between the inner annular groove 23 and the outer annular groove 24 to ensure the sealing performance between the first connecting sleeve 21 and the second connecting sleeve 22.

[0032] As Figure 3 and Figure 5 shown, a lifting rod 8 is movably connected in the housing 1. The lifting rod 8 is fixedly connected to the lifting seat 4. A bracket 801 is fixedly connected to the lower end of the lifting rod 8, and a sliding shaft 802 that is slidably connected to the inclined groove 213 is fixedly connected to the bracket 801. When the lifting rod 8 rises, the sliding shaft 802 slides in the inclined groove 213, driving the elastic frame 25 to bend outwards, so that the clamping portion 27 is separated from the clamping groove 28. When the first connecting sleeve 21 and the second connecting sleeve 22 are separated automatically under the elastic force of the cylindrical spring 210, the air outlet hole 211 is opened, and the high-pressure gas is released from the air outlet hole 211.

[0033] Working principle: When the instantaneous high pressure in the pipeline impacts the elastic diaphragm 9, the elastic diaphragm 9 deforms instantaneously, driving the ejector rod 7 to rise instantaneously. The rack 10 drives the gear 6 to rotate at high speed, driving the rotating frame 506 to rotate at high speed. When the rotating frame 506 rotates at high speed, relative sliding occurs between the rotating frame 506 and the card 503, causing the card 503 to shift. The teeth 504 on the card 503 engage with the internal gear ring 502, thereby preventing the rotating frame 506 from continuing to rotate. Similarly, the gear 6 cannot rotate either. When the ejector rod 7 continues to rise, it will drive the entire lifting seat 4 to rise, driving the lifting rod 8 to rise. When the lifting rod 8 rises, it drives the elastic frame 25 to bend outwards, causing the clamping portion 27 to separate from the card slot 28. When the first connecting sleeve 21 and the second connecting sleeve 22 separate automatically under the elastic force of the cylindrical spring 210, the air outlet 211 is opened, and the high-pressure gas is released from the air outlet 211, reducing the impact on the elastic diaphragm 9. Moreover, the stop frame 11 limits the displacement of the lifting seat 4, avoiding excessive deformation of the elastic diaphragm 9 and damage, and protecting the elastic diaphragm 9.

[0034] Finally, it should be noted that in the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0035] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An impact-resistant nuclear-grade pressure switch with a diaphragm protection function, characterized in that, Comprising: A housing (1), one end of the housing (1) is fixedly connected with an interface structure (2), and the other end of the housing (1) is fixedly connected with a microswitch (3); An elastic diaphragm (9) is connected at the interface of the housing (1), a push rod (7) is fixedly connected to the elastic diaphragm (9), and one end of the push rod (7) is connected to the microswitch (3); The interface structure (2) includes a first connecting sleeve (21) and a second connecting sleeve (22), the first connecting sleeve (21) is fixedly connected to the housing (1), and the first connecting sleeve (21) and the second connecting sleeve (22) are hermetically and movably connected, and an air outlet hole (211) is provided in the first connecting sleeve (21); An elastic frame (25) is fixedly connected to the surface of the first connecting sleeve (21), and a clamping seat (26) cooperating with the elastic frame (25) is fixedly connected to the surface of the second connecting sleeve (22); A clamping portion (27) is fixedly connected to the elastic frame (25), a clamping groove (28) cooperating with the clamping portion (27) is provided on the clamping seat (26), and an inclined groove (213) is provided on the surface of the elastic frame (25); A lifting rod (8) is movably connected in the housing (1), a bracket (801) is fixedly connected to the lower end of the lifting rod (8), and a sliding shaft (802) slidingly connected to the inclined groove (213) is fixedly connected to the bracket (801); A lifting seat (4) is slidably connected in the housing (1), the lifting rod (8) is fixedly connected to the lifting seat (4), a rotating member (5) is rotatably connected in the lifting seat (4), a gear (6) is coaxially fixedly connected to the rotating member (5), and a rack (10) meshing with the gear (6) is fixedly connected to the push rod (7); The rotating member (5) includes: a housing (501), the housing (501) is fixedly connected to the lifting seat (4); An internal gear ring (502) is fixedly connected in the housing (501), a rotating frame (506) is rotatably connected in the internal gear ring (502), the rotating frame (506) is coaxially fixedly connected to the gear (6); a card (503), connected to the periphery of the rotating frame (506), an arc-shaped groove (505) cooperating with the rotating frame (506) is provided in the card (503), and a locking tooth (504) capable of engaging with the internal gear ring (502) is provided on the card (503).

2. The impact-resistant nuclear-grade pressure switch with a diaphragm protection function according to claim 1, wherein One end of the rotating frame (506) is fixedly connected with a friction plate (507) contacting the arc-shaped groove (505).

3. The impact-resistant nuclear-grade pressure switch with a diaphragm protection function according to claim 2, wherein A blocking frame (11) is fixedly connected to the top inside the housing (1) for limiting the lifting seat (4), and an elastic member (12) is fixedly connected between the blocking frame (11) and the lifting seat (4).

4. The shock-resistant nuclear-grade pressure switch with a diaphragm protection function according to claim 3, characterized in that, A sliding rod (29) is fixedly connected to the clamping seat (26), the sliding rod (29) is slidably connected to the elastic frame (25), and a cylindrical spring (210) is connected to the surface of the sliding rod (29), and the cylindrical spring (210) is arranged between the clamping seat (26) and the elastic frame (25).

5. The impact-resistant nuclear-grade pressure switch with a diaphragm protection function according to claim 4, wherein An inner annular groove (23) is provided on the inner surface of the first connecting sleeve (21), the air outlet hole (211) is arranged in the inner annular groove (23), and an outer annular groove (24) hermetically cooperating with the inner annular groove (23) is provided on the outer surface of the second connecting sleeve (22).

6. The shock-resistant nuclear-grade pressure switch with a diaphragm protection function according to claim 5, characterized in that, A sealing piece (212) is connected between the inner annular groove (23) and the outer annular groove (24).

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