Harness hidden type constant-pressure water supply system

Abstract

The utility model relates to a wire harness hidden type constant pressure water supply system which comprises a water inlet header pipe, a water outlet header pipe and a booster pump set, one end of the water inlet header pipe is connected with a water storage unit, the other end of the water inlet header pipe is connected with the booster pump set through a water inlet ball valve, the booster pump set is fixed to a pump set base, and a wire groove used for hiding a wire harness is formed in the rear side of the pump set base. The other end of the booster pump set is connected with a water outlet check valve, the other end of the water outlet check valve is connected with a water outlet main pipe through a water outlet ball valve, the water outlet main pipe is connected with a pressure tank through a metal hose, the pressure tank is fixed to a pressure tank base, an air bag is arranged in the pressure tank, an air supply valve is arranged on the top face of the pressure tank, and air is supplied into a pressure tank cavity through the air supply valve. The water inlet main pipe, the water outlet main pipe and the booster pump set are all hidden in the hidden shell structure, and the booster pump set is connected with an HMI touch screen at the front end of the switch display cabinet through CAN communication. According to the utility model, the problems of high failure rate and high troubleshooting difficulty due to line redundancy are solved, and the starting times and energy consumption of the pump set are reduced.

Description

[Technical field]

[0001] The utility model relates to the technical field of variable frequency constant pressure water supply, in particular to a wire harness hidden type constant pressure water supply system. [Background Technology]

[0002] At present, when the frequency conversion control cabinet is connected to the unit, it needs to be installed after measuring the actual length. In the case of increasing working hours, it is impossible to achieve mass production and standardized operation. The original control system needs to control the intermediate relay through external wiring to drive the operation of its water pump, resulting in line redundancy, high failure rate, and difficulty in troubleshooting. Therefore, how to achieve mass prefabrication and standardized production of the main circuit and control circuit harness has become a technical problem that needs to be solved urgently. In addition, the traditional constant pressure water supply system often needs to frequently start the pump group to maintain the stability of the system pressure, which causes the problem of high energy consumption of the system. [Contents of the utility model]

[0003] The purpose of the utility model is to solve the above-mentioned deficiencies and provide a wiring harness hidden constant pressure water supply system, which can maintain the stability of system pressure without starting the pump group, reduce the number of starts and energy consumption of the pump group, and overcome the safety hazards caused by the large number of original external lines, as well as the problems of high failure rate and difficulty in troubleshooting due to line redundancy.

[0004] In order to achieve the above purpose, a wiring harness hidden constant pressure water supply system is designed, including a water inlet main pipe 155, a water outlet main pipe 156, a booster pump group, a pressure tank 120 and a switch display cabinet. One end of the water inlet main pipe 155 is connected to the water storage unit, and the water source is provided through the water storage unit. The other end of the water inlet main pipe 155 is connected to the booster pump group through the water inlet ball valve 123. The booster pump group is fixed on the pump group base 124. The rear side of the pump group base 124 is provided with a wire groove 122. The wire groove 122 is used to hide the wiring harness. The other end of the booster pump group is connected to the water outlet check valve 125. The water outlet check valve 123 is connected to the booster pump group through the water inlet ball valve 123. The other end of the valve 125 is connected to the water outlet main pipe 156 through the water outlet ball valve 126. The water outlet main pipe 156 is connected to the pressure tank 120 through a metal hose. The pressure tank 120 is fixed on the pressure tank base 121. The pressure tank 120 has a built-in air bag. The top surface of the pressure tank 120 is provided with an air replenishing valve 130, and air is replenished into the cavity of the pressure tank 120 through the air replenishing valve 130. The water inlet main pipe 155, the water outlet main pipe 156, and the booster pump group are all hidden in the hidden shell structure. The booster pump group is connected to the HMI touch screen 101 at the front end of the switch display cabinet through CAN communication.

[0005] Furthermore, the hidden shell structure includes a shell 157, a bracket 158, a left wing panel 150 and a right wing panel 159. The bracket 158 ​​is fixed on the pump group base 124, and the booster pump group is hidden in the bracket 158. The shell 157 is fixed on the bracket 158 ​​by bolts. The left wing panel 150 and the right wing panel 159 are symmetrically arranged on the left and right sides, and are fixed by screws after overlapping with the concave and convex surfaces of the shell 157 from top to bottom. The water inlet main pipe 155 and the water outlet main pipe 156 are hidden in the lower layer of the shell 157.

[0006] Furthermore, the booster pump group includes a motor 106, a pressure-resistant barrel 141 and a controller. The upper end of the pressure-resistant barrel 141 is sealed and connected to the motor 106, and the lower end of the pressure-resistant barrel 141 is sealed and connected to the pump head of the single pump. The controller is placed on the single pump for backpack installation. The motor 106 drives the built-in impeller of the pressure-resistant barrel 141 under the output drive of the controller, and squeezes the fluid in the water inlet main pipe 155 and outputs it to the water outlet main pipe 156, and then transmits it to the user.

[0007] Furthermore, the motor 106 drives the impeller inside the pressure-resistant barrel 141 through the impeller shaft, and the output end of the motor 106 is connected to the impeller shaft through a coupling. The outer cover of the impeller shaft and the coupling is provided with a protective cover 108 and is protected by the protective cover 108. The protective cover 108 is arranged above the pressure-resistant barrel 141, and an exhaust valve 154 is installed on the protective cover 108.

[0008] Furthermore, a controller operation panel 107 and a controller display screen 140 are provided at the front end of the controller, and a heat dissipation structure 151 is provided at the rear end of the controller, and the heat generated during operation is naturally ventilated through the heat dissipation structure 151.

[0009] Furthermore, a shock-absorbing pad 105 is provided below the booster pump group, and is fixed to the pump group base 124 via the shock-absorbing pad 105 . The controller of each single pump in the booster pump group is fixedly connected to the motor 106 via a fixing box 131 .

[0010] Furthermore, a power PG connector 128 and a signal PG connector 129 are provided at the controller of the booster pump group. The power PG connector 128 and the signal PG connector 129 are connected to the single pump through a wiring harness, and the wiring harness is hidden through a wire groove 122 when entering the switch display cabinet.

[0011] Furthermore, an audible and visual alarm light 102 is installed below the HMI touch screen 101 at the front end of the switch display cabinet. The control unit of the switch display cabinet communicates with the inverter on the booster pump group through CAN communication, and transmits the operating data and status of the booster pump group to the HMI touch screen 101 through CAN communication.

[0012] Furthermore, a front door panel 104 is installed at the lower front end of the switch display cabinet, and the front door panel 104 is opened or closed by a lock 103. A rear door panel 153 is installed at the upper rear end of the switch display cabinet, and the rear door panel 153 is opened or closed by a hidden lock 152. The rear door panel 153 is used for the control circuit at the rear end of the HMI display.

[0013] Furthermore, the connection between the water inlet ball valve 123 and the water inlet main pipe 155, and the connection between the water outlet ball valve 126 and the water outlet main pipe 156 are both bolted via flanges. The water inlet main pipe 155 is provided with a water inlet pressure sensor, and the water inlet pressure is detected by the water inlet pressure sensor. The water outlet main pipe 156 is provided with a water outlet pressure sensor 134 and a water outlet pressure gauge 135. The water outlet pressure sensor 134 is used to detect the water outlet pressure, and the water outlet pressure gauge 135 is used to display the actual pressure value of the current outlet.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] (1) When the booster pump unit of the utility model is started and the pressure is replenished, water is added to the air bag built into the pressure tank. After the air bag built into the pressure tank is subjected to water pressure, it is squeezed with the external supplementary gas. When the system pressure is constant and pressure fluctuation occurs, the air bag built into the pressure tank performs reverse pressure replenishment, thereby maintaining the stability of the system pressure without starting the pump unit, reducing the number of pump unit startups and energy consumption;

[0016] (2) The utility model uses its HMI to communicate with the controller through CAN, reduces the connection of external lines through integrated circuits, and realizes the efficiency sharing through frequency balancing after the pump groups communicate with each other, thereby reducing the energy consumption of the system;

[0017] (3) The utility model reduces the number of lines and reduces the number of system failures. It also monitors the system failures in real time through the built-in CAN communication of the controller, triggers the monitored failures and issues an alarm. When the failures are eliminated, the system automatically resumes operation, thereby achieving unattended operation of the pump group.

[0018] (4) The utility model eliminates the potential safety hazards caused by the large number of external lines. At the same time, the line harnesses of the main circuit and the control circuit are prefabricated through the spacing of the pump groups, thereby realizing standardized and modular production and assembly;

[0019] (5) The utility model can greatly reduce production costs, improve production efficiency, save system energy consumption, and ensure the normal and effective operation of the system under unattended working conditions.

[0020] (6) The utility model solves the technical problems of high redundant fault rate of system lines, greatly reducing the difficulty of troubleshooting, and replacing external control lines with integrated circuits is conducive to standardizing the external control circuits required by the system and mass producing them, thereby reducing the workload and improving production efficiency. [Drawings]

[0021] Figure 1 It is a front structural schematic diagram of the utility model;

[0022] Figure 2 It is a side structural schematic diagram of the utility model;

[0023] Figure 3 It is a schematic diagram of the top view structure of the utility model;

[0024] Figure 4 It is a three-dimensional structural schematic diagram of the utility model;

[0025] Figure 5 It is a schematic diagram of the exploded structure of the utility model;

[0026] In the figure: 101, HMI touch screen 102, sound and light alarm lamp 103, lock 104, front door panel 105, shock pad 106, motor 107, controller operation panel 108, protective cover 120, pressure tank 121, pressure tank base 122, wire trough 123, water inlet ball valve 124, pump group base 125, water outlet check valve 126, water outlet ball valve 127, water outlet main pipe blind plate 128, power supply PG connector 129, signal PG connector 130, air replenishment valve 131, fixing box 134, water outlet pressure sensor 135, water outlet pressure gauge 140, controller display screen 141, pressure barrel 150, left wing panel 151, heat dissipation structure 152, concealed lock 153, rear door panel 154, exhaust valve 155, water inlet main pipe 156, water outlet main pipe 157, shell 158, bracket 159, right wing panel. [Specific implementation method]

[0027] As attached Figure 1 To Attachment Figure 5As shown, the utility model provides a wiring harness hidden constant pressure water supply system, including a water inlet main pipe 155, a water outlet main pipe 156, a booster pump group, a pressure tank 120 and a switch display cabinet. One end of the water inlet main pipe 155 is connected to the water storage unit, and the water source is provided through the water storage unit. The other end of the water inlet main pipe 155 is connected to the booster pump group through a water inlet ball valve 123. The booster pump group is fixed on a pump group base 124. A wire groove 122 is provided on the rear side of the pump group base 124. The wire groove 122 is used to hide the wiring harness. The other end of the booster pump group is connected to a water outlet check valve 125. The other end of the valve 125 is connected to the water outlet main pipe 156 through the water outlet ball valve 126. The water outlet main pipe 156 is connected to the pressure tank 120 through a metal hose. The pressure tank 120 is fixed on the pressure tank base 121. The pressure tank 120 has a built-in air bag. The top surface of the pressure tank 120 is provided with an air replenishing valve 130, and air is replenished into the cavity of the pressure tank 120 through the air replenishing valve 130. The water inlet main pipe 155, the water outlet main pipe 156, and the booster pump group are all hidden in the hidden shell structure. The booster pump group is connected to the HMI touch screen 101 at the front end of the switch display cabinet through CAN communication.

[0028] Among them, the hidden shell structure includes a shell 157, a bracket 158, a left wing panel 150 and a right wing panel 159. The bracket 158 ​​is fixed on the pump group base 124, and the booster pump group is hidden in the bracket 158. The shell 157 is fixed to the bracket 158 ​​by bolts. The left wing panel 150 and the right wing panel 159 are symmetrically arranged on the left and right sides, and are fixed by screws after overlapping with the concave and convex surfaces of the shell 157 from top to bottom. The water inlet main pipe 155 and the water outlet main pipe 156 are hidden in the lower layer of the shell 157. The connection between the water inlet ball valve 123 and the water inlet main pipe 155, as well as the connection between the water outlet ball valve 126 and the water outlet main pipe 156 are both bolted via flanges. The water inlet main pipe 155 is equipped with a water inlet pressure sensor, and the water inlet pressure is detected by the water inlet pressure sensor. The water outlet main pipe 156 is equipped with a water outlet pressure sensor 134 and a water outlet pressure gauge 135. The water outlet pressure sensor 134 is used to detect the water outlet pressure, and the water outlet pressure gauge 135 is used to display the actual pressure value of the current outlet.

[0029] The booster pump group includes a motor 106, a pressure-resistant barrel 141 and a controller. The upper end of the pressure-resistant barrel 141 is sealed to the motor 106, and the lower end of the pressure-resistant barrel 141 is sealed to the pump head of the single pump. The controller is placed on the single pump for backpack installation. The motor 106 drives the built-in impeller of the pressure-resistant barrel 141 under the output drive of the controller, and squeezes the fluid in the water inlet main pipe 155 to output it to the water outlet main pipe 156, and then transmits it to the user; the motor 106 drives the built-in impeller of the pressure-resistant barrel 141 through the impeller shaft, and the output end of the motor 106 is connected to the impeller shaft through a coupling. The outer cover of the impeller shaft and the coupling is provided with a protective cover 108 and is protected by the protective cover 108. The protective cover 108 is arranged above the pressure-resistant barrel 141, and an exhaust valve 154 is installed on the protective cover 108.

[0030] A shock-absorbing pad 105 is provided below the booster pump group, and is fixed to the pump group base 124 through the shock-absorbing pad 105. The controller of each single pump in the booster pump group is fixedly connected to the motor 106 through a fixing box 131. A controller operation panel 107 and a controller display screen 140 are provided at the front end of the controller, and a heat dissipation structure 151 is provided at the rear of the controller, and the heat generated during its operation is naturally ventilated through the heat dissipation structure 151; a power PG connector 128 and a signal PG connector 129 are provided at the controller, and the power PG connector 128 and the signal PG connector 129 are connected to the single pump through a wiring harness, and the wiring harness is hidden through a wire groove 122 when entering the switch display cabinet.

[0031] An audible and visual alarm light 102 is installed below the HMI touch screen 101 at the front end of the switch display cabinet. The control unit of the switch display cabinet communicates with the frequency converter on the booster pump group through CAN communication, and transmits the operating data and status of the booster pump group to the HMI touch screen 101 through CAN communication; a front door panel 104 is installed at the lower front end of the switch display cabinet, and the front door panel 104 is opened or closed by a lock 103; a rear door panel 153 is installed at the upper rear end of the switch display cabinet, and the rear door panel 153 is opened or closed by a concealed lock 152, and the rear door panel 153 is used for the control circuit at the rear end of the HMI display.

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0033] The utility model mainly includes a frequency conversion cabinet control system, a voltage stabilizing system, a water supply unit, and a hidden shell structure; its main water inlet pipeline is connected to a water tank or a municipal pipeline, and the water inlet pressure is detected by a water inlet pressure sensor, and the water outlet pressure is detected by a water outlet pressure sensor. The set pressure is compared with the outlet feedback pressure. When the feedback pressure is lower than the set pressure, CAN communication is performed through the controller, and the pump is controlled according to the actual working conditions to achieve the stability of its water supply system. When the booster pump group starts to replenish pressure, water is also replenished to the built-in air bag of the air pressure tank. The built-in air bag of the pressure tank is squeezed with the external supplementary gas after being subjected to water pressure. When the system pressure is constant and pressure fluctuations occur, the built-in air bag of the pressure tank performs reverse pressure replenishment, thereby maintaining the stability of the system pressure without starting the pump group, reducing the number of starts and energy consumption of the pump group.

[0034] The frequency converter cabinet control system is connected to the controller through a wiring harness, which includes the main control and signal control. The wiring harness is fastened through a PG connector and directly connected to the prefabricated wire duct through a bellows. The hidden housing hides the booster pump group and improves the process. When the pump group sprays, it can block the leaking water droplets from directly contacting the wiring harness, which plays a certain protective measure and visually increases the external beauty and coordination.

[0035] The frequency conversion cabinet control system includes an HMI display unit, a control unit and a housing unit. The pressure is set on the HMI according to the actual working conditions. When the water outlet pressure is less than the set pressure value, the pump group is put into operation; the HMI display unit collects the operation data of the pump group, including the number of operations, the number of faults, the frequency, the current, the voltage, the power, the operation curve, etc.; the control unit mainly communicates with the frequency converter on the water pump through CAN communication, thereby realizing its control and data collection; the housing unit includes a front door panel, a lock, a concealed lock, and a rear door panel. Through this sheet metal structure, the electrical components required for the control are placed in the cabinet, providing a level of protection for the components and extending their service life.

[0036] The pressure stabilizing system includes a pressure stabilizing tank, a ball valve and a metal hose. The water outlet pipeline is connected to the ball valve and then fixed to the metal hose. The other end is connected to the pressure stabilizing tank. The fluid enters the pressure stabilizing tank through the metal hose. The water outlet pressure squeezes the air bag built into the flow stabilizing tank. The air bag squeezes the gas inside the cavity. When the outlet water has pressure fluctuations, the pressure is replenished in the opposite direction to the outlet main pipe through the squeezing of the gas and the air bag, thereby achieving constant pressure without starting the pump group, effectively reducing the number of starts of the pump group and reducing the energy consumption of the system.

[0037] The water supply unit includes a system consisting of a main water inlet pipeline, a water inlet valve, a booster pump, a water outlet valve, and a main water outlet pipeline; the water inlet pipeline is connected to a water storage unit, and water is provided to the main water inlet pipeline through the water storage unit; the water inlet valve is connected to the main water inlet pipeline on one side and to the booster pump on the other side, and the connection between the water outlet valve and the water outlet pipeline is also bolted through a flange, thereby realizing a modular and lightweight process during the production process, which is conducive to providing actual work efficiency.

[0038] The hidden shell structure includes a shell, a bracket, a left wing side panel, and a right wing side panel; accordingly, according to the hidden shell structure, the bracket is fixed on the base of the pump group, the shell is fixed on the bracket by bolts, the left wing side panel and the right wing side panel overlap with the concave and convex surfaces of the shell from top to bottom, and are fixed by screws; the above sheet metal parts are assembled by flexibly fixing their positions, and the external wires and cables are prefabricated and hidden in the wire trough under the structure, so as to reduce damage and leakage caused by exposed lines during construction and reduce risks.

[0039] The utility model aims at the technical problems existing in the prior art, and can replace the external line control by means of integrated circuits; while reducing the lines, it reduces the system failures, and monitors the system failures in real time through the built-in CAN communication of the controller, triggers the monitored failures and alarms; thus solving the high failure rate of the system line redundancy and greatly reducing the difficulty of troubleshooting. Replacing the external control line with an integrated circuit is conducive to the standardization and batch production of the external control loops required by the system; while reducing the workload, it improves the production efficiency and other technical problems.

[0040] The present invention is described in detail below through specific embodiments, and its application field is not limited, namely, it includes the field of water supply technology.

[0041] As attached Figure 1 As shown, the utility model transmits the operation data and status of the pump group to the HMI touch screen 101 through CAN communication. When an abnormality occurs in the system and an alarm is triggered, a reminder is given through the sound and light alarm lamp 102; the switch display cabinet opens or closes the front door panel 104 through the lock 103; when the system motor 106 is running, the pump group vibrates and is fixedly connected to the pump group base through the shock-absorbing pad 105, thereby effectively playing a buffering and expansion role; when the motor 106 is connected to the impeller shaft through a coupling, it is protected by a protective cover 108.

[0042] As attached Figure 2 As shown, the pressure tank 120 and the pressure tank base 121 are used for pressure difference compensation to achieve constant system pressure; when the wiring harness connected to the controller and the water pump needs to enter the switch cabinet, it is hidden through the wire groove 122; the booster pump group is fixed with the shock-absorbing pad and the pump group base 124, the water inlet ball valve 123 is connected to the water inlet pipeline, and the water outlet check valve 125 and the water outlet ball valve 126 are connected to the water outlet pipeline; the inlet and outlet water components are connected to the pump group to form a set of water supply equipment; the water outlet main pipe blind plate 127 can be installed on the left and right sides at will, and adjusted according to the actual working conditions of the wire groove; the power PG connector and the signal PG connector connect and output the wiring harness of the controller and the water pump, and hide the wiring harness in the wire groove 122, thereby realizing its hiding function.

[0043] As attached Figure 3 As shown, the pressure-stabilizing tank has an internal air bag, and air is replenished into the pressure tank cavity through an external air replenishment valve 130. The pressure difference compensation function is achieved through repeated squeezing of water pressure and air pressure. The single pump controller is fixed to the motor through a fixing box 131, which reduces the space required for placing the controller in the frequency conversion cabinet. The pressure value is monitored by comparing the pressure value with the set value through the water outlet pressure sensor 134. If the pressure is insufficient, the booster pump group is used to compensate the pressure. The water outlet pressure gauge 135 can intuitively display the actual pressure value of the current outlet.

[0044] As attached Figure 4As shown, the controller display screen 140 displays the operating status, and the operating status and operating data of the single pump can be checked on-site. The output of the controller drives the built-in impeller of the pressure-resistant barrel 141 to squeeze the fluid in the water inlet pipe and output it to the water outlet pipe, thereby delivering the fluid to the user.

[0045] As attached Figure 5 As shown, the left wing 150 and the right wing 159 overlap with the shell 157 and are fixed on the bracket 158 ​​to hide the water inlet pipe 155 and the water outlet pipe 156 in the lower layer of the shell 157; the controller is placed on the single pump for backpack installation, and the heat generated during its operation is naturally ventilated through the heat dissipation structure 151 to extend the service life of its integrated controller; the concealed lock 152 is used to open and close the rear door panel 153, and the rear door panel 153 is used for the control circuit at the rear end of the HMI display; when the pump group is operated for the first time, there is a certain amount of air inside the cavity, and the gas is discharged through the exhaust valve 154 to reduce the damage of cavitation to the pump group.

[0046] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. The standard parts used can be purchased from the market, and special-shaped parts can be customized according to the records in the specification and drawings. The specific connection methods of each part adopt mature conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0047] The present invention is not limited to the above-mentioned implementation modes, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be considered as equivalent replacement modes and shall be included in the protection scope of the present invention.

Claims

1. A wiring harness hidden constant pressure water supply system, comprising a water inlet main pipe (155), a water outlet main pipe (156), a booster pump group, a pressure tank (120) and a switch display cabinet, characterized in that: One end of the water inlet main pipe (155) is connected to the water storage unit, and water is provided through the water storage unit. The other end of the water inlet main pipe (155) is connected to the booster pump group through the water inlet ball valve (123). The booster pump group is fixed on the pump group base (124). The rear side of the pump group base (124) is provided with a wire groove (122). The wire groove (122) is used to hide the wire harness. The other end of the booster pump group is connected to the water outlet check valve (125). The other end of the water outlet check valve (125) is connected to the water outlet main pipe (156) through the water outlet ball valve (126). The main pipe (156) is connected to the pressure tank (120) through a metal hose. The pressure tank (120) is fixed on a pressure tank base (121). The pressure tank (120) has an internal air bag. The top surface of the pressure tank (120) is provided with an air supply valve (130), and air is supplied to the cavity of the pressure tank (120) through the air supply valve (130). The water inlet main pipe (155), the water outlet main pipe (156), and the booster pump group are all hidden in a hidden shell structure. The booster pump group is connected to the HMI touch screen (101) at the front end of the switch display cabinet through CAN communication.

2. The harness-hidden constant-pressure water supply system according to claim 1, characterized in that: The hidden shell structure comprises a shell (157), a bracket (158), a left wing plate (150) and a right wing plate (159); the bracket (158) is fixed on a pump unit base (124); the booster pump unit is hidden in the bracket (158); the shell (157) is fixed on the bracket (158) by bolts; the left wing plate (150) and the right wing plate (159) are symmetrically arranged on the left and right sides and are fixed by screws after overlapping with the concave and convex surfaces of the shell (157) from top to bottom; the water inlet main pipe (155) and the water outlet main pipe (156) are hidden in the lower layer of the shell (157).

3. The harness-hidden constant-pressure water supply system according to claim 1, characterized in that: The booster pump assembly comprises a motor (106), a pressure-resistant barrel (141) and a controller. The upper end of the pressure-resistant barrel (141) is sealedly connected to the motor (106), and the lower end of the pressure-resistant barrel (141) is sealedly connected to a pump head of a single pump. The controller is placed on the single pump for backpack installation. The motor (106) drives the built-in impeller of the pressure-resistant barrel (141) under the output drive of the controller to squeeze the fluid in the water inlet main pipe (155) and output it to the water outlet main pipe (156), and then transmit it to the user.

4. The harness-hidden constant-pressure water supply system according to claim 3, characterized in that: The motor (106) drives an impeller built in the pressure-resistant barrel (141) via an impeller shaft; the output end of the motor (106) is connected to the impeller shaft via a coupling; a protective cover (108) is provided around the impeller shaft and the coupling, and is protected by the protective cover (108); the protective cover (108) is disposed above the pressure-resistant barrel (141); and an exhaust valve (154) is installed on the protective cover (108).

5. The harness-hidden constant-pressure water supply system according to claim 3, characterized in that: The front end of the controller is provided with a controller operating panel (107) and a controller display screen (140), and the rear part of the controller is provided with a heat dissipation structure (151), and the heat generated during operation is naturally ventilated through the heat dissipation structure (151).

6. The harness-hidden constant-pressure water supply system according to claim 3, characterized in that: A shock absorbing pad (105) is provided below the booster pump group and is fixed to the pump group base (124) via the shock absorbing pad (105); the controller of each single pump in the booster pump group is fixedly connected to the motor (106) via a fixing box (131).

7. The harness-hidden constant-pressure water supply system according to claim 3, characterized in that: A power PG connector (128) and a signal PG connector (129) are provided at the controller of the booster pump group. The power PG connector (128) and the signal PG connector (129) are connected to the single pump via a wiring harness. When the wiring harness enters the switch display cabinet, it is hidden via a wiring trough (122).

8. The harness-hidden constant-pressure water supply system according to any one of claims 1 to 7, characterized in that: An audible and visual alarm lamp (102) is installed below the HMI touch screen (101) at the front end of the switch display cabinet. The control unit of the switch display cabinet communicates with the frequency converter on the booster pump group via CAN communication, and transmits the operating data and status of the booster pump group to the HMI touch screen (101) via CAN communication.

9. The harness-hidden constant-pressure water supply system according to any one of claims 1 to 7, characterized in that: A front door panel (104) is installed at the lower front end of the switch display cabinet, and the front door panel (104) is opened or closed by a lock (103). A rear door panel (153) is installed at the upper rear end of the switch display cabinet, and the rear door panel (153) is opened or closed by a concealed lock (152). The rear door panel (153) is used for the control circuit at the rear end of the HMI display.

10. The harness-hidden constant-pressure water supply system according to any one of claims 1 to 7, characterized in that: The connection between the water inlet ball valve (123) and the water inlet main pipe (155), and the connection between the water outlet ball valve (126) and the water outlet main pipe (156) are both fixed by bolts via flanges. The water inlet main pipe (155) is provided with a water inlet pressure sensor, and the water inlet pressure is detected by the water inlet pressure sensor. The water outlet main pipe (156) is provided with a water outlet pressure sensor (134) and a water outlet pressure gauge (135). The water outlet pressure sensor (134) is used to detect the water outlet pressure, and the water outlet pressure gauge (135) is used to display the actual pressure value of the current outlet.

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