A nuclear-grade water pump pressure switch

Abstract

The present invention belongs to the technical field of pressure switches, in particular to a nuclear-grade water pump pressure switch; the present invention includes: a housing, one end of the housing is provided with a connecting pipe, and the connecting pipe is fixedly connected to the water pipe in a sealed manner; an elastic diaphragm is connected inside the housing, the elastic diaphragm is hermetically connected at the connecting pipe, and a lifting frame is fixedly connected to the elastic diaphragm; a static contact piece is fixedly connected inside the housing, a moving contact piece is fixedly connected to the lifting frame, and the moving contact piece is arranged above the static contact piece; a pair of bendable elastic clamping plates are fixedly connected to the top of the housing, a clamping block that is engaged with the elastic clamping plates is fixedly connected to the lifting frame, and the clamping block is arranged between the two elastic clamping plates; when the water pressure increases to a specified pressure in the present invention, the clamping block will be engaged with the upper clamping groove, the moving contact piece is separated from the static contact piece, and the water pump is turned off; when the water pressure decreases to the specified pressure, the clamping block will be engaged with the lower clamping groove, the moving contact piece contacts the static contact piece, and the water pump is started; thus solving the problem of frequent starting of the water pump.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure switches, and particularly to a nuclear-grade water pump pressure switch. Background Art

[0002] The main features of nuclear-grade water pumps include high efficiency, low energy consumption, stable operation, etc. Through nuclear-grade technology, the water pump can work continuously and stably for a long time, providing strong power support for various industrial systems; nuclear-grade water pumps are widely used in multiple fields, such as urban water supply, sewage treatment, ocean engineering, etc.; especially in the urban water supply system, nuclear-grade water pumps ensure the safe and stable supply of urban residents' water with their high-efficiency and stable characteristics.

[0003] At present, most nuclear-grade water pumps for urban residents use water pressure signals to control all starting and stopping actions of the water pump. The more widely used one is the mechanical pressure switch. The principle of the mechanical pressure switch is based on the principle of force balance. It consists of components such as a spring, a piston, and contacts. When the measured water pressure changes, the spring will deform, pushing the piston to move, thereby causing the contacts to actuate and controlling the switch of the circuit; but when the mechanical pressure switch is in use, when the faucet is opened, a small change in the pressure in the water pipe will cause an increase in the deformation of the spring in the pressure switch, causing the moving contact and the static contact of the pressure switch to contact, and the water pump starts to fill the high-pressure water tank; although this mechanical switch can ensure that the water level in the water tank is at the specified height, the nuclear-grade water pump starts and stops automatically frequently with the opening and closing of the faucet, which easily reduces the service life of the water pump. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a nuclear-grade water pump pressure switch. By providing the cooperation of an elastic clamping plate and a clamping block, the frequent start of the water pump is avoided, aiming 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. A nuclear-grade water pump pressure switch proposed by the present invention includes: a housing, one end of the housing is provided with a connecting pipe, and the connecting pipe is fixedly and sealingly connected to the water pipe; an elastic diaphragm is connected inside the housing, the elastic diaphragm is sealingly connected at the connecting pipe, and a lifting frame is fixedly connected to the elastic diaphragm; a static contact is fixedly connected inside the housing, a moving contact is fixedly connected to the lifting frame, and the moving contact is arranged above the static contact; a pair of bendable elastic clamping plates are fixedly connected to the top of the housing, and a clamping block that is engaged with the elastic clamping plates is fixedly connected to the lifting frame, and the clamping block is arranged between the two elastic clamping plates.

[0006] As a preferred technical solution of the present invention, a first V-shaped groove is provided on the elastic clamping plate, and a pair of upper and lower distributed clamping grooves are provided in the first V-shaped groove. A clamping portion engaged with the clamping groove is fixedly connected to the clamping block. When the clamping portion is engaged with the lower clamping groove, the moving contact piece contacts the static contact piece. When the clamping portion is separated from the lower clamping groove, the moving contact piece is separated from the static contact piece.

[0007] As a preferred technical solution of the present invention, a pair of baffles are fixedly connected to the inner wall of the housing, and an elastic mechanism is connected between the baffles and the lifting frame.

[0008] As a preferred technical solution of the present invention, the elastic mechanism includes a guide rod fixedly connected to the baffle. The guide rod is slidably connected to the lifting frame, and a cylindrical spring is connected to the surface of the guide rod. The cylindrical spring applies an elastic force to the lifting frame.

[0009] As a preferred technical solution of the present invention, an L-shaped branch pipe is provided on the connecting pipe, and a piston block is hermetically and movably connected in the branch pipe. A piston rod is fixedly connected to the piston block.

[0010] As a preferred technical solution of the present invention, a side chamber extending outward is provided on one side of the housing. One end of the piston rod extends into the side chamber, and a lifting rod is fixedly connected to the upper end of the piston rod. An elastic member is fixedly connected between the lifting rod and the top of the side chamber.

[0011] As a preferred technical solution of the present invention, a support plate is fixedly connected to one end of the lifting rod. The support plate is arranged between two elastic clamping plates and is used to increase the distance between the two elastic clamping plates.

[0012] As a preferred technical solution of the present invention, a second V-shaped groove cooperating with the support plate is provided on the elastic clamping plate. The second V-shaped groove includes upper and lower inclined surfaces and a middle flat surface portion. When the support plate slides to the inclined surface portion, the distance between the two elastic clamping plates will be increased.

[0013] As a preferred technical solution of the present invention, both the clamping groove and the clamping portion are in an arc-shaped structure.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. In the present invention, a clamping block is fixedly connected to the lifting frame, and an elastic clamping plate cooperating with the clamping block is provided at the top of the housing. A first V-shaped groove is provided on the elastic clamping plate, and a pair of clamping grooves are provided in the first V-shaped groove. When the water pressure increases to a specified pressure, the clamping block will be engaged with the upper clamping groove, so that the moving contact piece is separated from the static contact piece, and the water pump is turned off. When the water pressure decreases to the specified pressure, the clamping block will be engaged with the lower clamping groove, so that the moving contact piece contacts the static contact piece, and the water pump is started. Thus, the frequent start of the water pump is avoided.

[0016] 2. In the present invention, a piston block is connected inside the branch pipe. When the water pressure increases or decreases, the piston block is driven to move up and down, and then the support plate is driven to move up and down. When the support plate moves a certain distance, the distance between the two elastic clamping plates is increased, so that the clamping block can be separated from the clamping groove, avoiding the problem that the clamping block is stuck between the elastic clamping plates and the water pump cannot start and stop normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic structural diagram of a nuclear-grade water pump pressure switch proposed by the present invention.

[0018] Figure 2 FIG. is a schematic cross-sectional view of a nuclear-grade water pump pressure switch proposed by the present invention.

[0019] Figure 3 FIG. is a three-dimensional cross-sectional view of a nuclear-grade water pump pressure switch proposed by the present invention.

[0020] Figure 4 FIG. is a schematic structural diagram of the elastic clamping plate proposed by the present invention.

[0021] Figure 5 FIG. is a schematic structural diagram of the clamping block proposed by the present invention.

[0022] In the figure: 1. Housing; 2. Lifting frame; 3. Clamping block; 31. Clamping part; 4. Elastic clamping plate; 41. First V-shaped groove; 42. Clamping groove; 43. Second V-shaped groove; 5. Side chamber; 6. Branch pipe; 7. Connecting pipe; 8. Elastic diaphragm; 9. Fixed contact; 10. Moving contact; 11. Guide rod; 12. Cylindrical spring; 13. Baffle; 14. Piston block; 15. Piston rod; 16. Lifting rod; 17. Elastic member; 18. Support plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to 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 of the embodiments.

[0024] Embodiment 1: This embodiment discloses a nuclear-grade water pump pressure switch, as Figures 1 - 5As shown in the figure, it includes a housing 1. One end of the housing is provided with a connecting pipe 7, and the connecting pipe 7 is hermetically and fixedly connected to an external water pipe. An elastic diaphragm 8 is connected inside the housing 1. The elastic diaphragm 8 has a bowl-shaped structure. The elastic diaphragm 8 is hermetically connected at the connecting pipe 7, and a lifting frame 2 is fixedly connected to the elastic diaphragm 8. The greater the water pressure, the greater the deformation of the elastic diaphragm 8, and the greater the rising height of the lifting frame 2. A static contact piece 9 is fixedly connected inside the housing 1, and a moving contact piece 10 is fixedly connected to the lifting frame 2. The moving contact piece 10 is located above the static contact piece 9. After the lifting frame 2 descends, the moving contact piece 10 contacts the static contact piece 9, and at this time the water pump is in the open state. After the lifting frame 2 rises, the moving contact piece 10 separates from the static contact piece 9, and at this time the water pump is in the closed state.

[0025] A pair of baffles 13 are fixedly connected to the inner wall of the housing 1. An elastic mechanism is connected between the baffles 13 and the lifting frame 2, and the elastic mechanism exerts a downward elastic force on the lifting frame 2. The elastic mechanism includes a guide rod 11. The guide rod 11 is fixedly connected to the baffle 13. The guide rod 11 is slidably connected to the lifting frame 2, and a cylindrical spring 12 is connected to the surface of the guide rod 11. The cylindrical spring 12 exerts an elastic force on the lifting frame 2. When the elastic force of the elastic diaphragm 8 is greater than the elastic force of the cylindrical spring 12, the lifting frame 2 rises. When the elastic force of the elastic diaphragm 8 is less than the elastic force of the cylindrical spring 12, the lifting frame 2 descends.

[0026] As Figure 4 and Figure 5 shown in the figure, a pair of bendable elastic clamping plates 4 are fixedly connected to the top of the housing 1. A clamping block 3 that engages with the elastic clamping plates 4 is fixedly connected to the lifting frame 2. The clamping block 3 is located between the two elastic clamping plates 4. A first V-shaped groove 41 is provided on the elastic clamping plate 4. A pair of upper and lower distributed clamping grooves 42 are provided in the first V-shaped groove 41. A clamping portion 31 that engages with the clamping grooves 42 is fixedly connected to the clamping block 3. Among them, both the clamping grooves 42 and the clamping portion 31 have an arc-shaped structure. When the external force received by the lifting frame 2 is relatively large, the clamping portion 31 will separate from the clamping grooves 42. When the clamping portion 31 engages with the lower clamping groove 42, the moving contact piece 10 contacts the static contact piece 9. When the clamping portion 31 separates from the lower clamping groove 42, the moving contact piece 10 separates from the static contact piece 9.

[0027] During specific implementation: When the water valve is opened, the water in the water pipe starts to flow, the water in the water tank decreases, the water pressure in the water pipe decreases, and the deformation amount of the elastic diaphragm 8 decreases. When the water pressure in the water pipe drops to P1, the elastic force of the cylindrical spring 12 is much greater than the elastic force of the elastic diaphragm 8, the clamping portion 31 separates from the clamping groove 42 at the upper position, driving the lifting frame 2 to descend. The clamping portion 31 will engage with the clamping groove 42 at the lower position, the moving contact piece 10 contacts the static contact piece 9, and the water pump starts to fill water into the water tank. When the water in the water tank is added to the specified height, the water pressure in the water pipe rises to P2 (P2 is greater than P1), the deformation amount of the elastic diaphragm 8 increases, the elastic force of the elastic diaphragm 8 is much greater than the elastic force of the cylindrical spring 12, causing the clamping portion 31 to separate from the clamping groove 42 at the lower position, the lifting frame 2 rises, making the clamping portion 31 engage with the clamping groove 42 at the upper position, and the moving contact piece 10 separates from the static contact piece 9, and the water pump shuts off.

[0028] Compared with the prior art mechanical switch, the distinguishing feature of the present invention is that the present invention designs an elastic clamping plate 4 and a clamping block 3, and a first V-shaped groove 41 is provided on the elastic clamping plate 4. A pair of upper and lower distributed clamping grooves 42 are provided in the first V-shaped groove 41, and a clamping portion 31 that engages with the clamping groove 42 is fixedly connected to the clamping block 3. In the prior art mechanical pressure switch, a similar structure is not disclosed. When the water pressure in the water pipe slightly changes, the diaphragm in the prior art mechanical pressure switch will deform, driving the piston rod (i.e., the lifting frame 2) to move, causing the moving contact piece to contact the static contact piece, thereby starting the nuclear-grade water pump to fill water into the high-pressure water tank, resulting in the nuclear-grade water pump starting too frequently. In the present invention, even when the pressure in the water pipe changes slightly (such as less than 0.08 Mpa), since the elastic clamping plate 4 and the clamping block 3 are in a clamped state, the water pressure supporting force received by the elastic diaphragm 8 changes little, and the elastic force of the cylindrical spring 12 is not sufficient to drive the lifting frame 2 to move, the pressure switch will not open, and the nuclear-grade water pump will not start. When the pressure in the water pipe changes greatly (such as greater than 0.08 Mpa), at this time, the water pressure supporting force received by the elastic diaphragm 8 becomes smaller, and the lifting frame 2 descends under the elastic force of the cylindrical spring 12, causing the moving contact piece 10 to contact the static contact piece 9, the pressure switch opens, driving the nuclear-grade water pump to start and filling water into the high-pressure water tank. The pressure switch of the present invention not only avoids the frequent start of the nuclear-grade water pump but also ensures that the water level in the high-pressure water tank is within a certain range of height.

[0029] Embodiment 2: Based on the structure of the above Embodiment 1, to avoid the phenomenon of the clamping block 3 being stuck with the clamping groove 42, an L-shaped branch pipe 6 is provided on the connecting pipe 7. A piston block 14 is hermetically and movably connected inside the branch pipe 6. A piston rod 15 is fixedly connected to the piston block 14. When the water pressure rises, it will drive the piston rod 15 to rise. One side of the housing 1 is provided with a side chamber 5 extending outward. One end of the piston rod 15 extends into the side chamber 5, and a lifting rod 16 is fixedly connected to the upper end of the piston rod 15. An elastic member 17 is fixedly connected between the lifting rod 16 and the top of the side chamber 5. The elastic member 17 can be a spring. When the pressure in the water pipe rises, the lifting rod 16 rises. When the pressure in the water pipe drops, the lifting rod 16 drops.

[0030] Among them, one end of the lifting rod 16 is fixedly connected with a support plate 18. The support plate 18 is arranged between the two elastic clamping plates 4. The support plate 18 is used to increase the distance between the two elastic clamping plates 4. Among them, the elastic clamping plate 4 is provided with a second V-shaped groove 43 that cooperates with the support plate 18. The second V-shaped groove 43 includes two upper and lower inclined surfaces and a middle flat surface. When the water pipe pressure is between P1 and P2, the support plate 18 is in the position of the flat surface part. When the support plate 18 is in the flat surface part, it will not apply pressure to the elastic clamping plate 4. When the support plate 18 slides to the inclined surface part, it will apply an outward pressure to the elastic clamping plate 4, thereby increasing the distance between the two elastic clamping plates 4, so that the clamping part 31 is separated from the clamping groove 42, avoiding the phenomenon of jamming that causes the water pump to fail to start and stop in time.

[0031] During specific implementation: When the pressure in the water pipe drops to P1, if the clamping part 31 has not separated from the upper clamping groove 42 and a jamming phenomenon occurs, as the pressure in the water pipe further drops, it will drive the lifting rod 16 to further drop, drive the support plate 18 to contact the lower inclined surface of the second V-shaped groove 43, and drive the two elastic clamping plates 4 to bend slightly outward, so that the clamping part 31 is separated from the upper clamping groove 42, causing the lifting frame 2 to drop, and the moving contact piece 10 to contact the static contact piece 9, and the water pump starts to pump water in time. Similarly, when the pressure in the water pipe rises to P2, if the clamping part 31 has not separated from the lower clamping groove 42 and a jamming phenomenon occurs, as the pressure in the water pipe further rises, it drives the lifting rod 16 to further rise, drives the support plate 18 to contact the upper inclined surface of the second V-shaped groove 43, and drives the two elastic clamping plates 4 to bend slightly outward, so that the clamping part 31 is separated from the lower clamping groove 42, the lifting frame 2 rises, and the moving contact piece 10 is separated from the static contact piece 9, and the water pump closes; thus avoiding the problem that the water pump cannot start and stop automatically normally.

[0032] 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.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A nuclear-grade water pump pressure switch, characterized in that, Comprising: A housing (1), at one end of the housing there is a connecting pipe (7), and the connecting pipe (7) is hermetically and fixedly connected to a water pipe; Inside the housing (1) there is an elastic diaphragm (8) connected, the elastic diaphragm (8) is hermetically connected at the connecting pipe (7), and a lifting frame (2) is fixedly connected to the elastic diaphragm (8); Inside the housing (1) there is a static contact piece (9) fixedly connected, the lifting frame (2) is fixedly connected with a moving contact piece (10), and the moving contact piece (10) is located above the static contact piece (9); At the top of the housing (1) there are fixedly connected a pair of elastic clamping plates (4) that can be bent, on the lifting frame (2) there is fixedly connected a clamping block (3) that engages with the elastic clamping plates (4), and the clamping block (3) is located between the two elastic clamping plates (4); On the elastic clamping plate (4) there is a first V-shaped groove (41), inside the first V-shaped groove (41) there are a pair of upper and lower distributed clamping grooves (42), and on the clamping block (3) there is fixedly connected a clamping portion (31) that engages with the clamping groove (42); when the clamping portion (31) engages with the lower clamping groove (42), the moving contact piece (10) contacts the static contact piece (9); when the clamping portion (31) separates from the lower clamping groove (42), the moving contact piece (10) separates from the static contact piece (9); On the inner wall of the housing (1) there are fixedly connected a pair of baffles (13), and between the baffles (13) and the lifting frame (2) there is an elastic mechanism connected; The elastic mechanism includes a guide rod (11), the guide rod (11) is fixedly connected to the baffle (13), the guide rod (11) is slidably connected to the lifting frame (2), and on the surface of the guide rod (11) there is a cylindrical spring (12) connected, and the cylindrical spring (12) applies an elastic force to the lifting frame (2).

2. The nuclear-grade water pump pressure switch according to claim 1, wherein On the connecting pipe (7) there is an L-shaped branch pipe (6), inside the branch pipe (6) there is a piston block (14) hermetically and movably connected, and on the piston block (14) there is a piston rod (15) fixedly connected.

3. The nuclear-grade water pump pressure switch according to claim 2, characterized in that, On one side of the housing (1) there is a side chamber (5) extending outwards, one end of the piston rod (15) extends into the side chamber (5), and at the upper end of the piston rod (15) there is a lifting rod (16) fixedly connected, and between the top of the lifting rod (16) and the side chamber (5) there is an elastic member (17) fixedly connected.

4. A nuclear-grade water pump pressure switch according to claim 3, characterized in that, At one end of the lifting rod (16) there is a support plate (18) fixedly connected, the support plate (18) is located between the two elastic clamping plates (4), and the support plate (18) is used to increase the distance between the two elastic clamping plates (4).

5. A nuclear-grade water pump pressure switch according to claim 4, characterized in that, On the elastic clamping plate (4) there is a second V-shaped groove (43) that cooperates with the support plate (18), the second V-shaped groove (43) includes upper and lower inclined surfaces and a middle flat surface portion; when the support plate (18) slides to the inclined surface portion, it will increase the distance between the two elastic clamping plates (4).

6. The nuclear-grade water pump pressure switch according to claim 5, characterized in that, Both the clamping groove (42) and the clamping portion (31) are in an arc-shaped structure.

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