Explosion-proof elevator five-way intercom system

Abstract

The utility model discloses a kind of anti-explosion elevator five-way intercom telephone systems, which is composed of emergency power supply in non-intrinsic safety area, first zener safety fence, second zener safety fence and intercom telephone line in intrinsic safety area;The intercom telephone line includes machine room intercom host computer, duty room intercom host computer, car intercom slave machine, pit intercom slave machine and car roof intercom slave machine, the positive and negative poles of the emergency power supply are connected with the machine room intercom host computer and the duty room intercom host computer through the first zener safety fence and the second zener safety fence respectively, and the +, -, R, L terminals of the machine room intercom host computer and the duty room intercom host computer are connected with the car intercom slave machine, the pit intercom slave machine and the car roof intercom slave machine respectively.The anti-explosion elevator five-way intercom telephone system provided by the utility model can realize five-way intercom calling function, meet the requirements of anti-explosion elevator standard, and has low cost and small space occupation of explosion-proof control cabinet.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, specifically to an explosion-proof elevator five-way intercom telephone system. Background Technology

[0002] Explosion-proof elevators are widely used in explosive environments. They are designed to withstand explosions without causing combustion or explosion in the surrounding atmosphere during normal use. The GB 31094-2014 standard, "Safety Code for the Manufacture and Installation of Explosion-proof Elevators," defines them as elevators composed of several electrical and non-electrical components, designed, manufactured, and installed according to specified conditions without causing combustion or explosion in the surrounding explosive atmosphere.

[0003] GB / T 7588.1-2020 "Safety Code for Elevator Manufacturing and Installation" requires elevators to have emergency alarm devices, generally located in five places: machine room, car, car top, pit, and monitoring room. Each location has an emergency alarm telephone. If people are trapped in the car, car top, or pit, they can contact the machine room or duty room for rescue through the emergency alarm telephone.

[0004] Because Table 10 of the explosion-proof elevator standard GB 31094-2014 requires that the alarm devices or telephones of explosion-proof elevators meet the requirements of the explosion-proof certificate, the specific electrical design and wiring also need to meet the requirements of the explosion-proof standard.

[0005] Current explosion-proof elevator intercom systems typically employ the following solutions to meet explosion-proof requirements:

[0006] Option 1: It consists of a telephone exchange, explosion-proof telephones, and telephone couplers. The disadvantage is that the telephone exchange generally uses AC220V power, so an additional UPS must be added, which takes up space in the explosion-proof control cabinet.

[0007] Option 2: Use dedicated intercom phones for the petrochemical industry. The disadvantage is that they are expensive, with a set of five intercom phones costing more than 15,000 yuan (about 3,000 yuan per phone, for a total of 5). Utility Model Content

[0008] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an explosion-proof elevator five-way intercom telephone system. This system can realize five-way intercom communication function, meet the standard requirements of explosion-proof elevators, and has low cost and small space occupation of explosion-proof control cabinet.

[0009] The technical solution of this utility model is as follows:

[0010] An explosion-proof elevator five-way intercom telephone system, the system consists of an emergency power supply located in a non-intrinsically safe area, a first Zener safety barrier, a second Zener safety barrier, and an intercom telephone line located in an intrinsically safe area;

[0011] The intercom telephone line includes a main intercom unit in the equipment room, a main intercom unit in the duty room, a secondary intercom unit in the car, a secondary intercom unit in the pit, and a secondary intercom unit on the car top. The positive and negative terminals of the emergency power supply are connected to the main intercom unit in the equipment room and the main intercom unit in the duty room through the first Zener safety barrier and the second Zener safety barrier, respectively. The +, -, R, and L terminals of the main intercom unit in the equipment room and the main intercom unit in the duty room are connected to the secondary intercom units in the car, the pit, and the car top, respectively.

[0012] The emergency power supply, the first Zener safety barrier, and the second Zener safety barrier are installed inside a sealed explosion-proof cabinet that meets the explosion-proof requirements.

[0013] The positive and negative power supplies of the intrinsically safe ends of the first and second Zener safety barriers are led out through the cable sealing stuffing box of the explosion-proof cabinet to the + and - terminals of the intercom host in the equipment room and the intercom host in the duty room.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This utility model consists of an emergency power supply, a Zener safety barrier, and a standard elevator intercom. The emergency power supply and Zener safety barrier are installed inside a sealed explosion-proof cabinet that meets explosion-proof requirements. The positive and negative power supplies of the intrinsically safe end of the Zener safety barrier are led out through the cable sealing stuffing gland of the explosion-proof cabinet to the + and - terminals of the intercom host in the machine room and the intercom host in the duty room. The function of the Zener safety barrier is to isolate the non-intrinsically safe circuit of the emergency power supply in order to meet explosion-proof standards, and then output to the intercom line in the intrinsically safe area through the intrinsically safe end. This system can realize five-way intercom communication function, meet the explosion-proof elevator standard requirements, and has low cost and small space occupation of the explosion-proof control cabinet. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 The present invention provides a circuit block diagram of an explosion-proof elevator five-way intercom telephone system. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] To illustrate the technical solution described in this utility model, specific embodiments are described below.

[0020] Example

[0021] Please see Figure 1 This embodiment provides an explosion-proof elevator five-way intercom system, which consists of an emergency power supply 1 (with its own battery, requiring no additional UPS) located in a non-intrinsically safe area, a first Zener safety barrier 2, a second Zener safety barrier 3, and an intercom line located in an intrinsically safe area.

[0022] in:

[0023] The emergency power supply 1, the first Zener safety barrier 2, and the second Zener safety barrier 3 are installed inside a sealed explosion-proof cabinet that meets the explosion-proof requirements.

[0024] The intercom telephone lines include a main intercom unit 4 in the equipment room, a main intercom unit 5 in the duty room, a secondary intercom unit 6 in the car, a secondary intercom unit 7 in the pit, and a secondary intercom unit 8 on the car top.

[0025] The positive and negative terminals of the emergency power supply 1 are connected to the intercom host 4 in the equipment room and the intercom host 5 in the duty room via the first Zener safety barrier 2 and the second Zener safety barrier 3, respectively. Specifically, the positive and negative power supplies of the intrinsically safe ends of the first Zener safety barrier 2 and the second Zener safety barrier 3 are led out through the cable sealing stuffing box of the explosion-proof cabinet to the + and - terminals of the intercom host 4 in the equipment room and the intercom host 5 in the duty room. The function of the Zener safety barrier is to isolate the non-intrinsically safe circuit of the emergency power supply in accordance with explosion-proof standards, and then output it to the intercom telephone line in the intrinsically safe area through the intrinsically safe end. Since the load capacity of a single Zener safety barrier is no more than 93mA, two Zener safety barriers are used to isolate the emergency power supply and then supply power to the intercom host 4 in the equipment room and the intercom host 5 in the duty room.

[0026] The +, -, R, and L terminals of the intercom host 4 in the control room and the intercom host 5 in the duty room are respectively connected to the intercom auxiliary unit 6 in the car, the intercom auxiliary unit 7 in the pit, and the intercom auxiliary unit 8 on the car top. The R and L lines are voice communication lines, thereby realizing the five-way intercom communication function.

[0027] In summary, this explosion-proof elevator five-way intercom system consists of an emergency power supply, a Zener safety barrier, and ordinary elevator intercom telephones. The emergency power supply in the non-intrinsically safe area is led out through the Zener safety barrier to the intercom host in the machine room and the intercom host in the duty room in the intrinsically safe area. The intercom host in the machine room and the intercom host in the duty room are then connected to the car intercom auxiliary unit, the pit intercom auxiliary unit, and the car top intercom auxiliary unit to realize the five-way intercom communication function. At the same time, the system can meet the requirements of explosion-proof elevator standards, and has low cost and small space occupation of the explosion-proof control cabinet.

[0028] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A five-way intercom system for explosion-proof elevators, characterized in that: The system consists of an emergency power supply located in the non-intrinsically safe area, a first Zener barrier, a second Zener barrier, and an intercom telephone line located in the intrinsically safe area; The intercom telephone line includes a main intercom unit in the equipment room, a main intercom unit in the duty room, a secondary intercom unit in the car, a secondary intercom unit in the pit, and a secondary intercom unit on the car top. The positive and negative terminals of the emergency power supply are connected to the main intercom unit in the equipment room and the main intercom unit in the duty room through the first Zener safety barrier and the second Zener safety barrier, respectively. The +, -, R, and L terminals of the main intercom unit in the equipment room and the main intercom unit in the duty room are connected to the secondary intercom units in the car, the pit, and the car top, respectively.

2. The explosion-proof elevator five-way intercom system according to claim 1, characterized in that: The emergency power supply, the first Zener safety barrier, and the second Zener safety barrier are installed inside a sealed explosion-proof cabinet that meets the explosion-proof requirements.

3. The explosion-proof elevator five-way intercom system according to claim 2, characterized in that: The positive and negative power supplies of the intrinsically safe ends of the first and second Zener safety barriers are led out through the cable sealing stuffing box of the explosion-proof cabinet to the + and - terminals of the intercom host in the equipment room and the intercom host in the duty room.

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