CN106315355A - Hydraulic system of high-rise residential building elevator - Google Patents

Abstract

The invention discloses a hydraulic system for elevators in high-rise residential buildings, which includes a total oil tank (1), and the total oil tank (1) is connected to a working oil circuit through an oil filter (2); Pump A (3), the inlet of the hydraulic pump A (3) is connected to the outlet of the oil filter (2), and the outlet of the hydraulic pump A (3) is connected in parallel with the safety valve A (5) and The P port of the three-position four-way proportional directional control valve A (8); the B port of the three-position four-way proportional directional control valve A (8) is connected to the oil outlet of the hydraulic cylinder (13), and its T port is connected to the oil tank A (7), its A port parallel speed control valve A (9) inlet and one-way valve C (11) outlet. The invention has the advantages of reasonable design, simple structure, easy realization and moderate cost, can effectively improve the safety and reliability of the elevator during operation, and at the same time run smoothly and comfortably, and is convenient for repair and maintenance.

Description

Elevator hydraulic system for high-rise residential buildings

technical field

The invention relates to the technical field of elevators, in particular to a hydraulic system applied to elevators in high-rise residential buildings.

Background technique

With the continuous improvement of the level of urbanization in our country and the continuous expansion of the city scale, the height of newly-built residential buildings is generally more than 20 to 30 floors. Stability issues are of great concern. Although traction elevator technology is relatively mature, many elevator accidents reported in recent years have shown that traction elevators still have many problems in ensuring people's life safety.

The elevators in existing residential buildings mainly use traction technology. The traction-driven elevator is to hang the car at one end of the traction wire rope, and hang the counterweight at the other end. Friction is generated between the lead wire rope and the rope groove of the traction sheave, thereby driving the elevator car up and down. However, when there are uncertain factors such as sudden power failure and mechanical failure, the car of the traction elevator is prone to free fall, causing great physical damage or even loss of life to the person taking the elevator. It restricts its development, so adopting safer and more reliable technology to improve the safety of elevator operation has become an urgent problem to be solved.

Contents of the invention

In order to solve the deficiencies in the prior art, the invention provides a hydraulic system for elevators in high-rise residential buildings.

The present invention is realized by adopting the following technical solutions:

A hydraulic system for elevators in high-rise residential buildings, comprising a total oil tank, the total oil tank is connected to a working oil circuit through an oil filter; the working oil circuit includes a hydraulic pump A, the inlet of the hydraulic pump A is connected to the outlet of the oil filter, the The outlet of the hydraulic pump A is connected in parallel with the safety valve A and the P port of the three-position four-way proportional reversing valve A through the one-way valve A; the B port of the three-position four-way proportional reversing valve A is connected to the oil outlet of the hydraulic cylinder, Its T port is connected to oil tank A, and its A port is connected in parallel with the inlet of speed regulating valve A and the outlet of check valve C; the oil inlet port of the hydraulic cylinder is connected in parallel with the outlet of check valve B and the inlet of speed regulating valve B; the outlet of speed regulating valve A The inlet of one-way valve B is connected, and the outlet of speed regulating valve B is connected with the inlet of one-way valve C.

When working, the hydraulic oil in the total oil tank is driven by the hydraulic pump A, passes through the check valve A, passes through the P port and the A port of the three-position four-way proportional reversing valve A, and then passes through the speed control valve A and the check valve B in turn. , into the oil inlet of the hydraulic cylinder, the hydraulic oil in the hydraulic cylinder passes through the oil return port, and passes through the B port and T port of the three-position four-way proportional reversing valve A. This process makes the hydraulic cylinder move to drive the elevator down; otherwise, the hydraulic cylinder drives When the elevator rises, the three-position four-way proportional reversing valve A changes direction, and the hydraulic oil in the total oil tank is driven by the hydraulic pump A, and enters the oil return port of the hydraulic cylinder through the P port and B port of the three-position four-way proportional reversing valve A , the hydraulic oil in the hydraulic cylinder passes through the oil inlet, passes through the speed control valve B and the one-way valve C in turn, and returns to the oil tank after passing through the A port and the T port of the three-position four-way proportional reversing valve A. This process makes the hydraulic cylinder Action drives the elevator up.

Preferably, in order for the elevator to run smoothly even when the working oil circuit breaks down, the main oil tank is connected in parallel with a working oil circuit and a backup oil circuit through an oil filter, and the backup oil circuit is the same as the working oil circuit. The backup oil circuit is connected to the accumulator through a two-position two-way electromagnetic reversing valve.

Preferably, the hydraulic system is also equipped with a control system, that is, it also includes a speed sensor that detects the running speed of the elevator, and the speed sensor inputs the detected running speed signal of the elevator into the PLC controller, and the preset speed signal value In comparison, when a certain set threshold value is exceeded, it is considered that there is an abnormality in the working oil circuit, and the PLC controller sends a control signal to open the backup oil circuit and close the working oil circuit; the accumulator immediately supplies high-pressure oil to the backup oil circuit. , after the standby oil circuit hydraulic pump works stably, the main oil tank will provide continuous high-pressure oil supply to the standby oil circuit, and at the same time, the PLC controller will give a reminder of the abnormality of the main oil circuit through the abnormal warning device of the working oil circuit.

The beneficial effects of the present invention are as follows:

1. A set of hydraulic system is designed to control the lifting of the elevator. Under normal conditions, the operation of the elevator is controlled through the working oil circuit. In an emergency, the safe lifting of the elevator is realized through the coordination of the working oil circuit and the backup oil circuit. The structure is simple and clear, and the design Reasonable thinking.

2. Through the control system, the working oil circuit and the standby oil circuit are coordinated and controlled. When the elevator is running normally, the working oil circuit is activated; when the working oil circuit is abnormal due to power failure, mechanical failure and other factors, the system automatically switches to the standby oil circuit. road, so that the elevator can continue to work smoothly and reliably.

3. The number of hydraulic components required by the present invention is small, the control technology is relatively mature, the total cost is low, and the maintenance is more convenient. Moreover, the hydraulic system controls the lifting of the elevator, which is more in line with the safe and efficient operation of the elevator for high-rise residents.

4. The present invention provides a good set of systems for enterprises engaged in real estate development, with high cost performance, which is beneficial for enterprises to provide customers with a safer elevator riding experience at a lower cost.

5. The present invention has strong pertinence, easy operation and installation, good use effect, and is convenient for popularization and application.

The elevator hydraulic system applied to residential high-rise buildings of the present invention has reasonable design, simple structure, easy implementation, moderate cost, can effectively improve the safety and reliability of the elevator during operation, and at the same time run smoothly and comfortably, and is convenient for maintenance.

Description of drawings

Figure 1 shows the flow chart of the hydraulic system.

Figure 2 shows the circuit diagram of the hydraulic system.

In the figure: 1-total oil tank, 2-oil filter, 3-hydraulic pump A, 4-check valve A, 5-safety valve A, 6-pressure gauge A, 7-oil tank A, 8-three-position four-way Proportional reversing valve A, 9-speed control valve A, 10-one-way valve B, 11-one-way valve C, 12-speed control valve B, 13-hydraulic cylinder, 14-one-way valve D, 15-speed control Valve C, 16-speed control valve D, 17-one-way valve E, 18-three-position four-way proportional reversing valve B, 19-fuel tank B, 20-accumulator, 21-two-position two-way electromagnetic reversing valve , 22-pressure gauge B, 23-safety valve B, 24-one-way valve F, 25-hydraulic pump B.

detailed description

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

A hydraulic system for elevators in high-rise residential buildings, the main oil tank 1 is connected in parallel with a working oil circuit and a backup oil circuit through an oil filter 2, and the spare oil circuit is the same as the working oil circuit.

As shown in Figure 2, the working oil circuit includes a hydraulic pump A3, the inlet of the hydraulic pump A3 is connected to the outlet of the oil filter 2, and the outlet of the hydraulic pump A3 is connected in parallel with the safety valve A5 through the one-way valve A4 and the P port of the three-position four-way proportional reversing valve A8; the B port of the three-position four-way proportional reversing valve A8 is connected to the oil outlet of the hydraulic cylinder 13, its T port is connected to the oil tank A7, and its A port The inlet of the speed regulating valve A 9 is connected in parallel with the outlet of the one-way valve C 11; the oil inlet of the hydraulic cylinder 13 is connected in parallel with the outlet of the one-way valve B 10 and the inlet of the speed regulating valve B 12; the outlet of the speed regulating valve A 9 is connected to the one-way valve The inlet of B10, the outlet of the speed regulating valve B12 is connected to the inlet of one-way valve C11. The safety valve A 5 is connected to the main fuel tank 1 . A pressure gauge A6 is installed on the working oil circuit.

When working, the hydraulic oil in the total oil tank 1 is driven by the hydraulic pump A3, passes through the one-way valve A4, passes through the P port and the A port of the three-position four-way proportional reversing valve A8, and then passes through the speed control valve A9 and After the one-way valve B 10, it enters the oil inlet port of the hydraulic cylinder 13, and the hydraulic oil in the hydraulic cylinder 13 passes through the oil return port and passes through the B port and the T port of the three-position four-way proportional reversing valve A 8. This process makes the hydraulic cylinder 13 The action drives the elevator down; on the contrary, when the hydraulic cylinder drives the elevator up, the three-position four-way proportional reversing valve A 8 changes direction, and the hydraulic oil in the total oil tank 1 is driven by the hydraulic pump A 3 and passes through the three-position four-way proportional reversing valve. The P port and B port of A 8 enter the oil return port of the hydraulic cylinder 13, the hydraulic oil in the hydraulic cylinder passes through the oil inlet port, passes through the speed control valve B 12 and the check valve C 11 in turn, and then passes through the three-position four-way proportional reversing valve The ports A and T of A 8 return to the oil tank A 7, and this process makes the hydraulic cylinder move to drive the elevator up.

Similarly, as shown in Figure 2, the backup oil circuit includes a hydraulic pump B 25, the inlet of the hydraulic pump B 25 is connected to the outlet of the oil filter 2, and the outlet of the hydraulic pump B 25 is connected in parallel with a safety valve F 24 Valve B 23 and the P port of the three-position four-way proportional reversing valve B18; the B port of the three-position four-way proportional reversing valve B18 is connected to the oil outlet of the hydraulic cylinder 13, and its T port is connected to the oil tank B19, its A The inlet of the speed regulating valve C 15 is connected in parallel with the outlet of the one-way valve E 17; the oil inlet port of the hydraulic cylinder 13 is connected in parallel with the outlet of the one-way valve D 14 and the inlet of the speed regulating valve D 16; the outlet of the speed regulating valve C 15 is connected to the one-way The inlet of the valve D14, the outlet of the speed regulating valve D16 is connected to the inlet of the one-way valve E17. The safety valve B 23 is connected to the main oil tank 1 . A pressure gauge B22 is installed on the standby oil circuit.

The working process of the standby oil circuit is the same as that of the working oil circuit.

The P port of the three-position four-way proportional reversing valve B18 on the standby oil circuit is connected to the P port of the two-position two-way electromagnetic reversing valve 21, and the A port of the two-position two-way electromagnetic reversing valve 21 is connected to the energy storage device 20. In an emergency, the accumulator provides high-pressure oil to the backup oil circuit, so that the elevator runs smoothly under the backup oil circuit.

When the control system is working, as shown in Figure 1, the speed sensor inputs the detected elevator running speed signal into the PLC controller, and compares it with the preset speed signal value, when it exceeds a certain set threshold ( This value can be set manually), if there is an abnormality in the working oil circuit, the PLC controller sends a control signal to control the action of the three-position four-way proportional reversing valve B to open the backup oil circuit, and at the same time, the PLC controller sends a control signal to control the three-position four-way The proportional reversing valve A acts to close the working oil circuit; at the same time, the PLC controller sends a control signal to control the action of the two-position two-way reversing valve, so that the accumulator immediately supplies high-pressure oil to the standby oil circuit. After the hydraulic pump of the standby oil circuit works stably, the main oil tank will provide continuous high-pressure oil supply to the standby oil circuit, and at the same time, the PLC controller will give a reminder of the abnormality of the main oil circuit through the abnormal warning device of the working oil circuit, which is convenient for maintenance personnel to carry out maintenance repair. Since the hydraulic system is used in residential elevators, due to the high floor, in order to reduce the waiting time for elevators, the efficiency must be improved. Therefore, in the working oil circuit and the standby oil circuit, the installation method of the check valve and the speed control valve is along the rectangle. The symmetrical arrangement of the corner lines improves the operating efficiency of the elevator. In addition, when starting the backup oil circuit, the accumulator first supplies high-pressure oil to the backup oil circuit to ensure the smooth operation of the elevator.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than limit them. Although detailed descriptions have been made with reference to the embodiments of the present invention, those of ordinary skill in the art should understand that the technical solutions of the present invention are modified Or equivalent replacements do not deviate from the spirit and scope of the technical solutions of the present invention, and all of them should be included in the protection scope of the claims.

Claims (6)

1. a high-rise residential building elevator hydraulic system, including total fuel tank (1), described total fuel tank (1) is connected by oil filter (2) Working oil path；It is characterized in that: described working oil path includes hydraulic pump A(3), described hydraulic pump A(3) import connect oil filter (2) outlet, described hydraulic pump A(3) export by check valve A(4) relief valve A(5 in parallel) and 3-position 4-way proportional reversing valve A (8) P mouth；Described 3-position 4-way proportional reversing valve A(8) B mouth connect hydraulic cylinder (13) oil-out, its T mouth connect fuel tank A (7), its A mouth parallel connection flow speed control valve A(9) import and check valve C(11) outlet；Described hydraulic cylinder (13) oil-in parallel connection check valve B (10) outlet and flow speed control valve B(12) import；Described flow speed control valve A(9) outlet connection check valve B(10) import, described flow speed control valve B (12) outlet connects check valve C(11) import.

High-rise residential building elevator hydraulic system the most according to claim 1, it is characterised in that: described relief valve A(5) connect Total fuel tank (1).

High-rise residential building elevator hydraulic system the most according to claim 1 and 2, it is characterised in that: in described working oil path Pressure gauge A(6 is installed).

High-rise residential building elevator hydraulic system the most according to claim 3, it is characterised in that: described total fuel tank (1) is passed through Oil filter (2) is parallel with working oil path and standby oil circuit, described in have oil circuit identical with working oil path.

High-rise residential building elevator hydraulic system the most according to claim 4, it is characterised in that: described standby oil circuit passes through two Position two electric change valves (21) connects accumulator (20).

High-rise residential building elevator hydraulic system the most according to claim 4, it is characterised in that: also include that detecting elevator runs The velocity sensor of speed, the elevator speed signal detected is input in PLC by described velocity sensor, with Rate signal value set in advance compares, when exceeding the threshold values of a certain setting, it is believed that working oil path occurs abnormal, and PLC is controlled Device processed sends control signal and is opened by standby oil circuit, working oil path is closed；Accumulator provides hydraulic oil to standby oil circuit at once, After standby oil circuit hydraulic pump works is stable, then provided lasting hydraulic oil supply, PLC control simultaneously by main fuel tank to standby oil circuit Device processed provides, by working oil path exception alarming device, the prompting that working connection is abnormal.