A pressure control switch

Abstract

A pressure control switch is provided in a pipeline. The pressure control switch includes a switch housing, a piston, an elastic member, a signal device and a sensor. The switch housing is a switch housing with an inner cavity. A piston is placed in the inner cavity. The outer end of the piston directly receives the pressure in the pipeline, and an elastic member is inserted between the inner end of the piston and the inner cavity. A waterproof structure is provided between the piston and the inner cavity wall. Two sensors are provided at both ends of the switch housing corresponding to the moving position of the piston, and a signal device for triggering the sensor is provided inside the piston. The control switch uses the displacement of the piston caused by pressure and elastic force as the driving member for starting the switch through the interaction between the piston and the elastic member. During the conversion process, it takes time to accumulate pressure potential energy, and delays the switch control in response to the pressure. Avoid frequent starts and stops caused by the immediate response of the pressure switch in the case of unstable pressure due to pipeline expansion, hot and cold temperature difference, and slight leakage in the pipeline system.

Description

[Technical field]

[0002] The present invention relates to the technical field of water supply systems, and in particular to related technologies used in pressure control switches in drinking water supply systems. [Background technology]

[0004] In water supply systems, especially in household or small commercial drinking water supply equipment or gas supply equipment, pressure switches are used in pipelines to control the switching of water / gas lines. The core of this pressure switch is the pressure sensing chip, which adjusts the control switch by directly sensing the internal pressure of the pipeline. For all pressure sensing chips, the trigger node is a preset pressure value, and the pressure sensing switch is a type of sensitive switch. Therefore, when the preset pressure fluctuates up and down, the switch will start and stop frequently, and the machine will start and stop frequently with the activation of the pressure switch. [Summary of the invention]

[0006] In view of the above problems, the present invention proposes a pressure control switch, which has the function of accumulating pressure potential energy, delaying the response pressure control effect, avoiding frequent startup, and delaying the switch control in response to pressure. While having the functions of high pressure closing and low pressure opening, it can store energy through its own elastic structure, avoiding frequent starts and stops caused by the immediate response of the pressure switch in the case of pressure instability caused by pipeline expansion, hot and cold temperature difference, and slight leakage of the pipeline system.

[0007] The pressure control switch involved in the present invention is arranged in a pipeline, and includes a switch housing, a piston, an elastic member, a signal device and a sensor. The switch housing is a switch housing with an inner cavity, and a piston is inserted in the inner cavity. The outer end of the piston directly receives the pressure in the pipeline, and the elastic member is inserted between the inner end of the piston and the inner cavity. A waterproof structure is provided between the piston and the wall of the inner cavity. In the switch housing, two sensors are provided at both ends corresponding to the moving position of the piston, and a signal device for triggering the sensor is provided inside the piston.

[0008] The inner cavity of the switch housing is closed at one end and has an opening at the other end, and a piston is filled in the opening. Two sensors, namely a first sensor and a second sensor, are arranged near the opening and the second sensor is arranged near the closed end. The first and second sensors sense the triggering of a signal device inside the piston and provide a circuit signal.

[0009] The signal device is a magnet, and the first sensor and the second sensor are Hall switches, which are connected to the control center through signal lines.

[0010] The elastic member is a compression spring.

[0011] The waterproof structure comprises a waterproof groove and an O-type waterproof sealing rubber ring. The waterproof groove is provided on the outer wall of the piston, and the O-type waterproof sealing rubber ring is inserted into the waterproof groove and tightly pressed against the inner cavity wall of the switch housing.

[0012] The switch housing includes a cylindrical shell, an end cover and an outer shell. The cylindrical shell constitutes an inner cavity, and the end cover is covered on one end of the cylindrical shell to constitute a closed end. The outer shell is connected to the end cover on the outside of the cylindrical shell. The outer shell has a recessed pressure inlet end inside, and the pressure inlet end is opposite to the outer end of the piston.

[0013] The first sensor and the second sensor are embedded in the outer shell.

[0014] The pressure control switch involved in the present invention uses the displacement of the piston caused by pressure and elastic force as the driving part of the start switch through the interaction between the piston and the elastic part. It takes time to accumulate pressure potential energy during the conversion process, delaying the response pressure control effect, avoiding frequent starts, and delaying the switch control in response to pressure. It avoids frequent starts and stops caused by the immediate response of the pressure switch in the case of unstable pressure caused by pipeline expansion, hot and cold temperature difference, and slight leakage of the pipeline system.

Brief Description of the Drawings

[0016] Figure 1 It is a structural diagram of a pressure control switch system involved in the present invention;

[0017] Figure 2 It is a structural schematic diagram of a pressure control switch involved in the present invention;

[0018] Wherein: 100, pressure control switch; 200, fluid pump; 210, pipeline; 220, valve; 230, signal line;

[0019] 10. Switch housing; 11. Inner cavity; 12. Cylindrical housing; 13. End cover; 14. Outer housing; 15. Pressure inlet port; 20. Piston; 30. Elastic member; 40. Signal device; 50. Waterproof structure; 51. Waterproof groove; 52. O-type waterproof rubber ring; 61. First sensor; 62. Second sensor. [Specific implementation method]

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are 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, and therefore cannot be understood as a limitation on the present invention.

[0023] Please refer to the attached Figure 1 , which shows a pressure control switch placed in a pipeline system, the pressure control switch 100 is installed in an overall fluid supply system, wherein a fluid pump 200 is used to transport fluid to a device, through a pipeline 210, and through a valve 220 set on the pipeline 210, the fluid is transported, and the pressure control switch senses the pressure between the fluid pump 200 and the valve 220, and controls the fluid pump 200 through a signal line 230, thereby realizing a switch control with delayed pressure response.

[0024] Please refer to the attached Figure 2 : The structure of the pressure switch is shown therein, the pressure control switch is arranged in a pipeline 210, and includes a switch housing 10, a piston 20, an elastic member 30, a signal device 40 and a sensor. The switch housing 10 is a switch housing with an inner cavity, and the piston 20 is inserted into the inner cavity 11. The outer end of the piston 20 directly receives the pressure in the pipeline, and the elastic member 30 is inserted between the inner end of the piston and the inner cavity 11. A waterproof structure 50 is provided between the piston 20 and the inner cavity wall. In the switch housing 10, two sensors are provided at both ends corresponding to the moving position of the piston 20, and a signal device 40 for triggering the sensor is provided inside the piston 20.

[0025] The inner cavity of the switch housing 10 is closed at one end and has an opening at the other end, and the opening is filled with a piston 20. Two sensors are provided, namely a first sensor 61 and a second sensor 62. The first sensor 61 is arranged near the opening, and the second sensor 62 is arranged near the closed end. The first and second sensors sense that the internal signal device 40 of the piston 20 is triggered and provide a circuit signal, which is transmitted through a signal line 230.

[0026] In this embodiment, the signal device 40 is a magnet, and correspondingly, the first sensor 61 and the second sensor 62 are Hall switches. The Hall switch senses the magnet moving with the piston and triggers a signal. The Hall switch is connected to the control center through a signal line 230. Of course, from the perspective of industrial implementation, other switches and triggers can also be considered, as long as they are short-range sensing and responding signal devices and receivers.

[0027] The elastic member 30 is a compression spring.

[0028] The waterproof structure 50 includes a waterproof groove 51 and an O-type waterproof sealing rubber ring 52 . The waterproof groove 51 is provided on the outer wall of the piston 20 . The O-type waterproof sealing rubber ring 52 is inserted into the waterproof groove 51 and tightly abuts against the inner wall of the switch housing 10 .

[0029] The switch housing 10 includes a cylindrical shell 12, an end cover 13 and an outer shell 14. The cylindrical shell 12 constitutes an inner cavity 11, and the end cover 13 covers one end of the cylindrical shell to constitute a closed end. The outer shell 14 is connected to the end cover 13 outside the cylindrical shell 12. The outer shell 13 has a recessed pressure inlet end 15 inside, and the pressure inlet end 15 is opposite to the outer end of the piston 20. The pressure inlet end 15 provides a contact part for the fluid to directly contact and press the piston 20, so as to prevent the piston 20 from being directly inserted into the pipe 210 and blocking the flow of the fluid. Therefore, a recessed groove structure is formed to allow the fluid to directly transmit pressure to the piston 20, pushing the piston 20 to press the elastic member 30 to move toward the second sensor 62. When the fluid pressure in the pipe 210 decreases, the piston 20 receives the rebound pressure of the elastic member 30, and moves outward and retreats to the direction of the first sensor 62.

[0030] A first sensor 61 and a second sensor 62 are embedded in the outer shell 14 .

[0031] The pressure control switch involved in the present invention has a cavity structure as the main body, in which a spring and a piston are placed. The piston senses the pressure of the fluid in the pipeline and can move in the cavity. There is a signal device 40 in the piston, and there are two sensors outside the inner cavity that sense the signal device 40, corresponding to the initial position and the compressed position of the piston. The pressure control switch is often used in conjunction with a fluid pump 200. After the fluid pump 200 is started and the fluid enters the inner cavity 11 of the pressure control switch 100, the fluid pressure pushes the piston 20 to move, the spring is compressed and deformed, and the pressure of the fluid is converted into the elastic potential energy of the spring. When the piston 20 moves to the position of the second sensor 62, the magnet in the piston 20 triggers the Hall sensor, the second sensor 62 gives a shutdown signal, and the fluid pump 200 stops working. When the pressure in the pipeline 210 drops sharply, the spring rebounds, pushing the piston 20 to reset, triggering the first sensor 61, the first sensor 61 gives a start signal, and the fluid pump 200 starts. When the pressure in the pipeline 210 is slowly reduced due to pipeline expansion, temperature difference, slight leakage, etc., the spring elastic potential energy in the pressure switch is slowly released to compensate for the pressure loss until the pressure loss is complete, and then the Hall sensor is triggered to start the fluid pump 200. This can better protect the fluid pump 200 and avoid frequent start and stop.

[0032] The pressure control switch involved in the present invention uses the displacement of the piston caused by pressure and elastic force as the driving part of the start switch through the interaction between the piston and the elastic part. It takes time to accumulate pressure potential energy during the conversion process, delaying the response pressure control effect, avoiding frequent starts, and delaying the switch control in response to pressure. It avoids frequent starts and stops caused by the immediate response of the pressure switch in the case of unstable pressure caused by pipeline expansion, hot and cold temperature difference, and slight leakage of the pipeline system.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A pressure control switch, which is arranged in a pipeline, characterized in that: The pressure control switch includes a switch housing, a piston, an elastic member, a signal device and a sensor. The switch housing is a switch housing with an inner cavity. The piston is placed in the inner cavity. The inner cavity of the switch housing is closed at one end and has an opening at the other end. The opening is filled with a piston. The outer end of the piston directly receives the pressure in the pipeline, and an elastic member is inserted between the inner end of the piston and the inner cavity. A waterproof structure is provided between the piston and the wall of the inner cavity. In the switch housing, two sensors are provided at both ends corresponding to the moving position of the piston, wherein the two sensors are respectively a first sensor and a second sensor. The first sensor is arranged near the opening of the inner cavity of the switch housing, and the second sensor is arranged near the closed end of the inner cavity of the switch housing. A signal device for triggering the sensor is provided inside the piston. When the piston approaches the first sensor, the first sensor gives a water pump start signal after being triggered. When the piston approaches the second sensor, the second sensor gives a water pump stop signal after being triggered.

2. The pressure control switch according to claim 1, characterized in that: The signal device is a magnet, and the first sensor and the second sensor are Hall switches, which are connected to the control center through signal lines.

3. The pressure control switch according to claim 1, characterized in that: The elastic member is a compression spring.

4. The pressure control switch according to claim 1, characterized in that: The waterproof structure comprises a waterproof groove and an O-type waterproof sealing rubber ring. The waterproof groove is provided on the outer wall of the piston, and the O-type waterproof sealing rubber ring is inserted into the waterproof groove and tightly pressed against the inner cavity wall of the switch housing.

5. The pressure control switch according to claim 2, characterized in that: The switch housing includes a cylindrical shell, an end cover and an outer shell. The cylindrical shell constitutes an inner cavity, and the end cover is covered on one end of the cylindrical shell to constitute a closed end. The outer shell is connected to the end cover on the outside of the cylindrical shell. The outer shell has a recessed pressure inlet end inside, and the pressure inlet end is opposite to the outer end of the piston.

6. The pressure control switch according to claim 5, characterized in that: The first sensor and the second sensor are embedded in the outer shell.

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