Compensation type double-cavity non-negative pressure water supply equipment

Abstract

The utility model relates to the technical field of water supply equipment, in particular to compensation type double-cavity non-negative-pressure water supply equipment which comprises a low-pressure cavity and a high-pressure cavity, the front end of the low-pressure cavity is fixedly connected with the high-pressure cavity, a vacuum suppressor is installed at the upper end of the low-pressure cavity, the upper end of the low-pressure cavity is fixedly communicated with a water inlet header pipe, and the lower end of the low-pressure cavity is fixedly communicated with a water outlet header pipe. And a flow controller is installed in the water inlet main pipe, the front end of the low-pressure cavity fixedly communicates with a first pipeline, and a flow direction changing structure is arranged on the left side of the first pipeline. Through cooperation of the flow direction changing structure and the high-pressure cavity, when an equipment water outlet pressure sensor detects that the pressure at the outlet end of the equipment cannot meet the pressure requirement of the most unfavorable water using point of a user, the motor drives the valve to rotate, so that the opening direction is located on the right side of the device, and water stored in the high-pressure cavity is rapidly compensated to the inlet of the equipment for pressurization; workers are prevented from controlling the two valves to be matched respectively, operation errors are prevented, and normal work of the device cannot be affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to water supply equipment technical field, concretely is a compensation formula double cavity no negative pressure water supply equipment. BACKGROUND

[0002] No negative pressure water supply is an energy -conserving and environment -friendly water supply mode, and its core principle is to utilize the residual pressure of municipal water supply pipe network, carries out secondary pressurization water supply through specific equipment, and simultaneously ensures that the municipal pipe network pressure is not lower than the set protection pressure.

[0003] For example, the announcement number is "CN220550632U" compensation formula double cavity no negative pressure water supply equipment, can effectively alleviate the user water consumption during the peak period of adjustment, intelligent peak shaving, in order to cooperate to ensure that the user water under the premise of realizing the effect of safe, reliable, stable water supply.But the device needs staff to control the opening or closing of two valves according to the pressure when water supply, when manually controlling two valves, the staff may cause valve matching error, so that the valve cannot be adjusted according to the actual demand, affecting the normal work of the device. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the valve matching error caused by the staff's carelessness, which leads to the valve adjustment according to the actual demand, and proposes a compensation formula double cavity no negative pressure water supply equipment.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] Design a compensation formula double cavity no negative pressure water supply equipment, including low pressure chamber and high pressure chamber, the front end of low pressure chamber is fixedly connected with high pressure chamber, the upper end of low pressure chamber is installed with vacuum suppressor, the upper end of low pressure chamber is fixedly communicated with water inlet main pipe, the inside of water inlet main pipe is installed with flow controller, the front end of low pressure chamber is fixedly communicated with first pipeline, the left side of first pipeline is equipped with flow direction changing structure.

[0007] Preferably, the flow direction changing structure includes a box and a rotating valve, the right end of the box is fixedly connected with the outer wall of the first pipeline, the lower end of the box is fixedly connected with a motor, the output shaft of the motor is rotatably connected with the box through a sealing bearing, the output end of the motor is fixedly connected with a lever, the lower end of the rotating valve is fixedly connected with a circular plate, and the lower end of the circular plate is fixedly connected with two cylinders.

[0008] Preferably, the rear end of the box is fixedly connected with the outer wall of the second pipeline, the end of the second pipeline is fixedly communicated with the high pressure chamber, and the left end of the box is fixedly connected with the outer wall of the third pipeline.

[0009] The end of the first pipeline is fixedly communicated with a fourth pipeline, the front end of the fourth pipeline is fixedly communicated with the water inlets of a plurality of variable frequency speed pumps respectively, and a frequency converter is installed above the variable frequency speed pumps.

[0010] Preferably, the water outlets of the plurality of variable frequency speed pumps are fixedly communicated with a water outlet main pipe, a diaphragm air pressure tank is installed inside the water outlet main pipe, and the left side of the water outlet main pipe is fixedly communicated with a third pipeline.

[0011] Preferably, the front of the fourth pipeline is fixedly communicated with a bypass pipeline, the front end of the bypass pipeline is fixedly communicated with the water outlet main pipe, and a pressure sensor is installed at the upper end of the water outlet main pipe.

[0012] The compensating type double-cavity non-negative pressure water supply equipment has the beneficial effects that: when the equipment water pressure sensor detects that the equipment outlet end pressure cannot meet the pressure requirement required by the user at the least used water point, the motor drives the lever to rotate, the lever contacts the cylinder, drives the cylinder to move, the cylinder movement drives the circular plate to rotate 180 degrees, then the lever no longer contacts the cylinder, the motor is turned off, at this time, the rotating valve opening direction is located on the right side of the device, the water stored in the high pressure cavity is rapidly compensated to the equipment inlet to increase the pressure, the staff respectively controls two valves to cooperate, the operation mistake is prevented, and the normal work of the device is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of the utility model;

[0014] Figure 2 It is a top view of Figure 1 ; It is a sectional view of

[0015] Figure 3 It is a sectional view of Figure 2 ; It is a right view of

[0016] Figure 4 It is a schematic view of A part of Figure 3 ; It is a sectional view of

[0017] Figure 5 It is a sectional view of Figure 4 ; It is a sectional view of

[0018] Figure 6 It is a sectional view of Figure 4 ; It is a sectional view of

[0019] In the figure: 1, the water inlet main pipe, 2, the flow controller, 3, the low pressure cavity, 4, the vacuum inhibitor, 5, the first pipeline, 6, the second pipeline, 7, the third pipeline, 8, the flow direction changing structure, 801, the box, 802, the motor, 803, the lever, 804, the round plate, 805, the cylinder, 806, the rotary valve, 9, the fourth pipeline, 10, the variable frequency speed regulation pump, 11, the bypass pipe, 12, the water outlet main pipe, 13, the diaphragm air pressure tank, 14, the high pressure cavity, 15, the pressure sensor. DETAILED DESCRIPTION

[0020] The utility model will be further described below in combination with the drawings:

[0021] Referring to the drawings Figures 1-6 :

[0022] In this embodiment, a compensation type double-cavity non-negative pressure water supply equipment includes a low pressure cavity 3 and a high pressure cavity 14, the front end of the low pressure cavity 3 is fixedly connected with the high pressure cavity 14, the upper end of the low pressure cavity 3 is provided with a vacuum inhibitor 4, the upper end of the low pressure cavity 3 is fixedly communicated with a water inlet main pipe 1, the water inlet main pipe 1 is communicated with an external municipal pipe network, a flow controller 2 is installed in the water inlet main pipe, the front end of the low pressure cavity 3 is fixedly communicated with a first pipeline 5, the left side of the first pipeline 5 is provided with a flow direction changing structure 8, the end of the first pipeline 5 is fixedly communicated with a fourth pipeline 9, the front end of the fourth pipeline 9 is fixedly communicated with the water inlets of a plurality of variable frequency speed regulation pumps 10, a frequency converter is installed above the variable frequency speed regulation pump 10, the water outlets of the plurality of variable frequency speed regulation pumps 10 are fixedly communicated with a water outlet main pipe 12, the water outlet main pipe 12 is communicated with an external user pipeline, a diaphragm air pressure tank 13 is installed in the water outlet main pipe 12, the left side of the water outlet main pipe 12 is fixedly communicated with a third pipeline 7, the front of the fourth pipeline 9 is fixedly communicated with a bypass pipe 11, the front end of the bypass pipe 11 is fixedly communicated with the water outlet main pipe 12, the upper end of the water outlet main pipe 12 is installed with a pressure sensor 15, the working modes of the flow controller 2, the variable frequency speed regulation pump 10, the diaphragm air pressure tank 13 and the pressure sensor 15 are same as those in the publication number “CN220550632U”, and excessive details will not be repeated here.

[0023] Referring to the drawings Figures 1-6 :

[0024] The flow direction changing structure 8 comprises a box 801 and a rotating valve 806, the right end of the box 801 is fixedly connected with the outer wall of the first pipeline 5, the lower end of the box 801 is fixedly connected with a motor 802, the motor 12 is a servo motor, the specific model is selected according to the actual working requirement, and the working requirement is met; the output shaft of the motor 802 is rotatably connected with the box 801 through a sealing bearing, the output end of the motor 802 is fixedly connected with a lever 803, the output shaft of the motor 802 can drive the lever 803 to rotate, the lower end of the rotating valve 806 is fixedly connected with a circular plate 804, the lower end of the circular plate 804 is fixedly connected with two cylinders 805, the center of the circular plate 804 is different from that of the lever 803, the lever 803 rotates to contact the cylinder 805 on one side, drives the cylinder 805 to move, and makes the circular plate 804 rotate by 180 degrees, then the lever 803 is no longer in contact with the cylinder 805, the rear end of the box 801 is fixedly connected with the outer wall of the second pipeline 6, the end of the second pipeline 6 is fixedly communicated with the high-pressure cavity 14, and the left end of the box 801 is fixedly connected with the outer wall of the third pipeline 7.

[0025] Working principle:

[0026] The municipal pipe network water is delivered to the inside of the low-pressure cavity 3 through the water inlet main pipe 1, then the rotating valve 806 is opened (at this time, the opening direction of the rotating valve 806 is located at the left side), the water in the low-pressure cavity 3 is pressurized through the first pipeline 5, the fourth pipeline 9 and the frequency conversion speed regulating pump 10, the high-pressure water enters the inner wall of the high-pressure cavity 14, when the high-pressure cavity 14 is filled with water, the rotating valve 14 is closed, and the high-pressure water is stored in the high-pressure cavity 2 for standby;

[0027] When the device outlet pressure sensor 15 detects that the device outlet pressure cannot meet the required pressure requirements of the user's least utilized water point, the automatic control variable frequency pump 10 group starts to run, and as the output frequency increases, the motor speed of the variable frequency pump 10 group also increases accordingly. When the water supply pressure sensor 15 detects that the water supply pressure reaches the system set pressure value (the parameter is pre-set), the motor speed stabilizes to balance. When the user's water consumption increases, the outlet pressure value of the device outlet pressure sensor 15 decreases. The above motor speed cannot maintain the set system parameter value, the pipe network control system balance is destroyed, and the pipe network control system pressure deviates from the set value. The external power supply of the motor 802 is turned on, the motor 802 is started to drive the lever 803 to rotate, the lever 803 contacts the cylinder 805 to drive the cylinder 805 to move, the cylinder 805 moves to drive the circular plate 804 to rotate 180 degrees, then the lever 803 no longer contacts the cylinder 805, the motor 802 is turned off, and at this time the rotating valve 806 opening direction is located on the right side of the device. The water stored in the high-pressure cavity 2 is quickly compensated to the device inlet to increase the pressure, and at the same time the pipe network control system sends a signal to increase the output frequency of the frequency converter of the variable frequency pump 10 group, so that the motor speed quickly increases to respond to the system set pressure value, so as to reach a new balance. When the output frequency of the frequency converter of the variable frequency pump 10 group reaches the highest frequency, the motor speed responds to the rated speed, and cannot respond to the parameter change (generally delayed for 20-30s, adjustable), the variable frequency pump 10 switches to the working frequency operation, and the other variable frequency pump 10 starts to operate at variable frequency, so as to continue to maintain the stable system pressure; when the user's water consumption decreases, the pressure increases to the upper limit of the pressure, and the variable frequency pump 10 operates at a reduced speed; when the user's water consumption continues to decrease, the frequency of the variable frequency pump 10 gradually decreases, and when the frequency is lower than the minimum frequency (20Hz), the variable frequency pump 10 stops running, and the working frequency pump switches to variable frequency operation; when the water consumption further decreases, the frequency of the variable frequency pump 10 has decreased to the sleep frequency (15Hz, the parameter is pre-set), and after a period of time (i.e. sleep time, the parameter is pre-set), the frequency converter starts to sleep, and the variable frequency pump 10 stops rotating, and the device enters a sleep state. The pipe network control system monitors the value change of the outlet pressure sensor 15 at any time, and when the outlet pressure is lower than the set wake-up pressure value (90%-95% of the device outlet set pressure value, the parameter is pre-set), the frequency converter of the variable frequency pump 10 restarts to operate.

[0028] When the water supply of the water supply network is greater than the user water demand, according to the above principle, the rotating valve 806 is rotated to the left side of the device again, the frequency of the frequency conversion speed regulating pump 10 is raised to store water in the high pressure cavity 14, and the diaphragm air pressure tank 13 is stored at the same time, when the water supply of the water supply network is less than the user water demand, the reserved water in the high pressure cavity 14 is released to stabilize the pressure of the water supply network. Among them, the protection measure of the low inlet pressure: the pipe network control system monitors the pressure of the water supply network through the flow controller 2 at all times, when the pressure of the water supply network decreases and approaches the specified minimum set pressure value of the water supply network, the flow controller 2 gradually closes or closes small, reduces the water quantity from the water supply network, thereby restores the inlet pressure value, protects the water supply network from negative pressure. Secondly, the protection measure under the condition of small flow: when the user does not use water or the water consumption is very small, the equipment enters the dormant (shutdown) state, the high pressure gas in the diaphragm air pressure tank 13 compensates the water in the cavity to the outlet of the equipment water outlet main pipe 12 through the pressure balance principle, and plays a role in stabilizing the pressure of the user pipe network, when the outlet pressure of the water outlet main pipe 12 decreases to the pressure of starting the pump, the frequency conversion speed regulating pump 10 starts to start, and the normal water supply is restored.

[0029] Although the utility model has been illustrated and described by referring to the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details can be made within the scope of the claims.

Claims

1. A compensating double-cavity non-negative pressure water supply device, comprising a low-pressure cavity (3) and a high-pressure cavity (14), the front end of the low-pressure cavity (3) is fixedly connected with the high-pressure cavity (14), characterized in that: The upper end of the low-pressure cavity (3) is provided with a vacuum inhibitor (4), the upper end of the low-pressure cavity (3) is fixedly communicated with a water inlet main pipe (1), the inside of the water inlet main pipe (1) is provided with a flow controller (2), the front end of the low-pressure cavity (3) is fixedly communicated with a first pipeline (5), and the left side of the first pipeline (5) is provided with a flow direction changing structure (8).

2. The compensated dual-chamber non-negative pressure water supply device according to claim 1, characterized in that: The flow direction changing structure (8) comprises a box body (801) and a rotating valve (806), the right end of the box body (801) is fixedly connected with the outer wall of the first pipeline (5), the lower end of the box body (801) is fixedly connected with a motor (802), the output shaft of the motor (802) is rotatably connected with the box body (801) through a sealing bearing, the output end of the motor (802) is fixedly connected with a lever (803), the lower end of the rotating valve (806) is fixedly connected with a circular plate (804), and the lower end of the circular plate (804) is fixedly connected with two cylinders (805).

3. The compensated dual-chamber non-negative pressure water supply device according to claim 2, characterized in that: The rear end of the box body (801) is fixedly connected with the outer wall of a second pipeline (6), the end of the second pipeline (6) is fixedly communicated with a high-pressure cavity (14), and the left end of the box body (801) is fixedly connected with the outer wall of a third pipeline (7).

4. The compensated dual-chamber non-negative pressure water supply device according to claim 1, characterized in that: The end of the first pipeline (5) is fixedly communicated with a fourth pipeline (9), the front end of the fourth pipeline (9) is fixedly communicated with the water inlets of a plurality of variable frequency speed regulating pumps (10) respectively, and the variable frequency speed regulating pumps (10) are provided with frequency converters above.

5. The compensated dual-chamber non-negative pressure water supply device according to claim 4, characterized in that: The water outlets of the plurality of variable frequency speed regulating pumps (10) are fixedly communicated with a water outlet main pipe (12), and the inside of the water outlet main pipe (12) is provided with a diaphragm air pressure tank (13).

6. The compensated dual-chamber non-negative pressure water supply device according to claim 4, characterized in that: The front of the fourth pipeline (9) is fixedly communicated with a bypass pipe (11), the front end of the bypass pipe (11) is fixedly communicated with the water outlet main pipe (12), and the upper end of the water outlet main pipe (12) is provided with a pressure sensor (15).

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