Pressure switch device for waterway system

Abstract

The utility model discloses a pressure switch device for a waterway system. The pressure switch device comprises a base, an outer protective shell and a bottom shell, the bottom shell is provided with a solid part, and a water flow channel is formed in the solid part. The base is welded and fixed at the interface in the bottom shell and is communicated with the water flow passage of the bottom shell; a rubber diaphragm, an ejection column and a compression spring are arranged in the base, the top end of the ejection column upwards penetrates out of the base and then is connected with an elastic piece, the elastic piece is matched with an electric contact, and the electric contact is connected to the circuit board; the outer protective shell covers the bottom shell and is connected with the bottom shell through a thread structure; and a hoop is locked on the outer side of the connecting position of the outer protective shell and the bottom shell. According to the pressure switch device, the traditional structural form that the outer shell is connected with the base is changed, the bottom shell structure is designed, and the outer protective shell is assembled and connected with the bottom shell, so that the integrity of the base is well maintained, and as additional drilling on the base is not needed, key parts in the base are better maintained, and the performance of the pressure switch device product is further maintained.

Description

Technical Field

[0001] The utility model relates to a pressure switch, in particular to a pressure switch device for a water circuit system. Background Art

[0002] An alarm-type pressure switch in a water circuit system is usually connected to the monitored water pipe. When the water flow pressure in the water pipe exceeds a preset value, the water flow pushes the rubber diaphragm to drive the ejector rod to act, causing the contact to close, so that the circuit is connected to realize signal transmission for alarm purposes. Most of the existing pressure switches for water circuit systems have their outer shells fixed to the base, so it is necessary to process structures for connecting the outer shell on the base, such as screw fixing holes, etc. However, the base is used for the installation of key components such as the ejector rod and the rubber diaphragm. Once the base is damaged due to improper secondary processing, it will affect the setting of the entire pressure switch and increase the defective rate of the pressure switch product. Summary of the Utility Model

[0003] In order to solve the deficiencies of the above technologies, the utility model provides a pressure switch device for a water circuit system.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a pressure switch device for a water circuit system, including a base, and it further includes an outer protective shell and a bottom shell;

[0005] The bottom shell has a solid part, and a water flow passage is opened at the solid part;

[0006] The base is welded and fixed at the interface inside the bottom shell and is communicated with the water flow passage of the bottom shell;

[0007] A rubber diaphragm, an ejector post and a compression spring are arranged in the base. The compression spring is sleeved on the ejector post, and the ejector post is connected to the rubber diaphragm at the bottom end. The top end of the ejector post passes through the base upward and is connected with a spring piece. The spring piece is adapted to an electrical contact, and the electrical contact is connected to a circuit board;

[0008] The outer protective shell covers the outside of the base, the circuit board and the electrical contact and is connected with the bottom shell through a threaded structure; a clamp is locked on the outside at the connection position between the outer protective shell and the bottom shell.

[0009] Preferably, the bottom shell is provided with a water inlet and a water outlet, and the water inlet and the water outlet are respectively communicated with the water flow passage.

[0010] Preferably, the base includes a columnar part, a disc part and a water passing part which are distributed in sequence from top to bottom;

[0011] The ejector post and the compression spring are installed in the columnar part, the rubber diaphragm is adaptively installed in the groove formed in the disc part, the rubber diaphragm connects the water passing part, and the water passing part communicates with the water flow passage.

[0012] Preferably, the circuit board has two mounting arms. After the bottom ends of the mounting arms are folded, they are locked to the struts by fixing screws.

[0013] Preferably, the strut is fixed to the base by welding.

[0014] Preferably, a wire hole is formed in the top of the outer casing, and the wire connected to the circuit board passes through the wire hole.

[0015] Preferably, a circular groove is provided at the position of the outer wall where the outer casing and the bottom casing are connected. The circular groove of the outer casing and the circular groove of the bottom casing are jointly used for the installation of the clamp.

[0016] Preferably, the clamp includes two hinged hoop bodies. A lock is provided at one end of the two hoop bodies, and sealing gaskets are fixed to the inner sides of the two hoop bodies.

[0017] The utility model discloses a pressure switch device for a water circuit system, which changes the traditional structural form of the connection between the outer casing and the base. The bottom casing structure is designed, and the outer casing and the bottom casing are assembled and connected. After the assembly is completed, the base is directly connected to the bottom casing as a whole, so as to better maintain the integrity of the base. Since there is no need to drill holes in the base additionally, the key components in the base can be better maintained, and then the performance of the pressure switch device product can be maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 is Figure 1 a schematic diagram of the structure of the clamp in

[0020] Figure 3 is Figure 1 a schematic cross-sectional structure diagram of

[0021] Figure 4 is Figure 3 a schematic enlarged structure diagram of part A in

[0022] In the figure: 1. Outer casing; 2. Base; 3. Clamp; 4. Water inlet; 5. Water outlet; 6. Circuit board; 71. Cylindrical part; 72. Disk part; 73. Water passing part; 8. Wire; 9. Wire hole; 10. Electrical contact; 11. Spring piece; 12. Fixing screw; 13. Column; 14. Rubber diaphragm; 15. Water flow path; 16. Top column; 17. Compression spring; 18. Interface; 19. Circular groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0024] The utility model discloses a pressure switch device for a water circuit system, which includes a base, and also includes an outer housing 1 and a bottom shell 2;

[0025] First of all, as can be seen from the overall structure shown in Figure 1 , the outer housing 1 and the bottom shell 2 are assembled together. As shown in Figure 3 , the two are specifically connected through a threaded structure; and to ensure the reliability of the connection, a clamp 3 is locked on the outside of the connection position between the outer housing 1 and the bottom shell 2; again, as shown in Figure 2 , the clamp 3 includes two hinged hoop bodies 31. The two hoop bodies 31 are jointly provided with a lock 33 at one end to achieve locking; and sealing gaskets 32 are fixed on the inner sides of the two hoop bodies 31. When the clamp 3 is locked to the connection position between the outer housing 1 and the bottom shell 2, the sealing gasket 32 can closely adhere to the connection gap between the outer housing 1 and the bottom shell 2, playing a role of sealing and isolation, thereby greatly reducing the intrusion of liquids such as water into the interior of the pressure switch device and further improving safety.

[0026] Preferably, to prevent the clamp 3 from moving up and down after being locked, as shown in Figure 4 , a circular groove 19 is provided at the outer wall position where the outer housing 1 and the bottom shell 2 are connected. The circular groove of the outer housing 1 and the circular groove of the bottom shell 2 are jointly used for the installation of the clamp 3.

[0027] Secondly, again, as shown in Figure 1 , a water inlet 4 and a water outlet 5 are provided on the bottom shell 2. As shown in Figure 3 , the bottom shell 2 has a solid part, and a water flow passage 15 is opened at the solid part. The water inlet 4 and the water outlet 5 are respectively communicated with the water flow passage 15 to form the entire water flow passage.

[0028] At the same time, an interface 18 is opened at the top of the water flow passage. The base is arranged at the interface to achieve the connection between the water flow passage 15 and the base. Thus, after this pressure switch device is installed on the monitoring water pipe, when the water flow pressure exceeds the preset value, the water entering the base from the interface will push the rubber diaphragm 14 to complete the alarm work of the pressure switch.

[0029] For components such as the base, the rubber diaphragm 14, the ejector pin 16, and the compression spring 17 inside the base, the traditional pressure switch form can be used, as shown in Figure 2As shown in the figure, first, for the convenience of description, the base structure is divided as follows, including a column part 71, a disk part 72, and a water-passing part 73 that are distributed in sequence from top to bottom. Among them, the column part 71 is used for the installation of the top column 16 and the compression spring 17. A specific shaped groove is formed in the disk part 72, and the rubber diaphragm 14 is adaptively installed in the groove formed in the disk part 72. The disk part 72 is sequentially connected to the water-passing part 73. Thus, the rubber diaphragm 14 connects to the water-passing part 73, and the water-passing part 73 communicates with the water flow path 15, so that water can flow into the water-passing part 73 from the interface 18, and when the water pressure is too high, the rubber diaphragm can be pushed.

[0030] The compression spring 17 is sleeved on the top column 16, and the top column 16 is connected to the rubber diaphragm 14 at the bottom end. The top end of the top column 16 passes through the base upward and is connected with a spring piece 11. The spring piece 11 is adapted with an electric contact 10, and the electric contact 10 is connected to the circuit board 6. The wire 8 led out by the circuit board 8 includes a power line on the one hand and a signal transmission wire on the other hand. When the rubber diaphragm 14 is pushed upward, the top column 16 moves upward, and the compression spring is compressed, so that the spring piece 11 contacts the corresponding electric contact 10, and the contact is closed, thus the circuit is connected to realize signal transmission to achieve the alarm function. Correspondingly, when the water pressure decreases to less than the predetermined value, the compression spring 17 resets, driving the top column 16 and the rubber diaphragm 14 to move downward, and the spring piece 11 leaves the electric contact 10, and the contact is in the off state.

[0031] After setting up the base and the internal structure, the base is welded and fixed at the interface 18 by using the water-passing part 73 of the base, and then the spring piece 11 is fixedly installed at the top end of the top column 16. The electric contact 10 is connected to the circuit board 6. The circuit board 6 has two mounting arms. The bottom ends of the mounting arms are folded and locked on the support column 13 by fixing screws 12. The support column 13 is a structure pre-welded and fixed on the base 13. Furthermore, a wire hole 9 for the wire connected to the circuit board 6 to pass through is opened at the top of the outer housing 1. After the wire 8 is passed out from the wire hole 9, the outer housing 1 is tightened on the bottom shell 2 by using a threaded structure, and then the upper clamp 3 is locked to obtain Figure 1 the pressure switch device for the water circuit system of the present new type shown in the figure.

[0032] The clamp structure has the advantage of convenient installation and disassembly operations. Combined with the outer housing 1 assembled by a threaded structure, the pressure switch device of the present new type has the advantage of convenient maintenance operations. And different from the traditional connection structure where the outer shell is fixed to the base by screws, the present new type uses the bottom shell to connect to the outer housing. Since there is no need to drill holes in the base structure, the base, the rubber diaphragm, the top column, and the compression spring, which are key structures, are better protected, thus realizing the maintenance of the pressure switch device product.

[0033] The above embodiments are not limitations on the present utility model, nor is the present utility model limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model also fall within the protection scope of the present utility model.

Claims

1. A pressure switch device for a water system, comprising a base, characterized in that: It also includes an outer protective shell (1) and a bottom shell (2); The bottom shell (2) has a solid portion, and a water flow passage (15) is provided in the solid portion; The base is welded and fixed at an interface (18) in the bottom shell (2) and is connected to a water flow path (15) of the bottom shell (2); A rubber diaphragm (14), a top column (16) and a compression spring (17) are arranged in the base. The compression spring (17) is sleeved on the top column (16), and the top column (16) is connected to the rubber diaphragm (14) at the bottom. The top end of the top column (16) passes through the base upward and is connected to a spring sheet (11). The spring sheet (11) is adapted to be equipped with an electrical contact (10), and the electrical contact (10) is connected to the circuit board (6). The outer protective shell (1) is arranged outside the base, the circuit board (6) and the electrical contacts (10) and is connected to the bottom shell (2) via a threaded structure; a clamp (3) is locked on the outside of the connection position between the outer protective shell (1) and the bottom shell (2).

2. The pressure switch device for a water system according to claim 1, characterized in that: The bottom shell (2) is provided with a water inlet (4) and a water outlet (5), and the water inlet (4) and the water outlet (5) are respectively connected to the water flow path (15).

3. The pressure switch device for a water system according to claim 2, characterized in that: The base comprises a columnar portion (71), a disc portion (72) and a water passage portion (73) which are sequentially arranged from top to bottom; The top column (16) and the compression spring (17) are installed in the column part (71), and the rubber diaphragm (14) is adapted to be installed in the groove formed in the disc part (72). The rubber diaphragm (14) is connected to the water passing part (73), and the water passing part (73) is connected to the water flow path (15).

4. The pressure switch device for a water system according to claim 1, characterized in that: The circuit board (6) has two mounting arms, and the bottom ends of the mounting arms are folded and locked on the pillars (13) by fixing screws (12).

5. The pressure switch device for a water system according to claim 4, characterized in that: The support column (13) is fixed on the base by welding.

6. The pressure switch device for a water system according to claim 1, characterized in that: A wire hole (9) is provided on the top of the outer protective shell (1), and a wire (8) connected to the circuit board (6) is passed through the wire hole (9).

7. The pressure switch device for a water system according to claim 1, characterized in that: A ring groove (19) is provided at the position of the outer wall where the outer protective shell (1) and the bottom shell (2) are connected, and the ring groove of the outer protective shell (1) and the ring groove of the bottom shell (2) are used together for installing the clamp (3).

8. The pressure switch device for a water system according to claim 7, characterized in that: The clamp (3) comprises two hinged clamp bodies (31), one end of the two clamp bodies (31) is commonly provided with a lock buckle (33), and the inner sides of the two clamp bodies (31) are both fixed with sealing pads (32).

Images