Fatigue hydraulic system for gas cylinder

Abstract

The utility model discloses a fatigue hydraulic system for a gas cylinder, and belongs to the field of fatigue tests. The pressurization and pressure relief circuit comprises a pressure sensor arranged in the gas cylinder, a relay KA1 and a pressure relief electromagnetic valve; the oil pump protection circuit comprises an oil level sensor arranged in an oil tank and a relay KA2; the oil pump contactor is connected with contacts of the relay KA1 and the relay KA2; the controller is connected with the pressure sensor, the oil level sensor, the relay KA1, the relay KA2, the oil pump contactor and the pressure relief electromagnetic valve. The purpose of pump stop protection when the oil level is too low is achieved through the oil pump protection circuit, the purpose of pump stop pressure relief protection when the pressure in the cylinder exceeds a set value is achieved through the pressurization and pressure relief circuit, and the safety of the oil pump and the gas cylinder is guaranteed when the fatigue hydraulic system is used.

Description

Technical Field

[0001] The utility model relates to the field of fatigue testing, in particular to a fatigue hydraulic system for a gas cylinder. Background Art

[0002] In the prior art, fatigue hydraulic systems are often used to perform fatigue tests on natural gas cylinders, hydrogen cylinders, etc. to test the pressure resistance and reliability of the cylinders. The current fatigue hydraulic system generally controls the fatigue system to pressurize and release the cylinder through computer software. Once the software is stuck, the hydraulic pump (oil pump) will uncontrollably pressurize the cylinder and cause the cylinder to explode, posing a safety hazard of cylinder explosion. In addition, when the oil level in the fuel tank is too low, the continuous operation of the oil pump will cause damage to the oil pump. Utility Model Content

[0003] The utility model aims to overcome the problems existing in the existing fatigue hydraulic system and provides a fatigue hydraulic system for a gas cylinder.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A fatigue hydraulic system for a gas cylinder is provided, comprising:

[0006] Controller;

[0007] A pressurization and pressure relief circuit, comprising a pressure sensor, a relay KA1 and a pressure relief solenoid valve arranged in the gas cylinder;

[0008] The oil pump protection circuit includes an oil level sensor and a relay KA2 arranged in the oil tank;

[0009] The oil pump contactor is connected to the contacts of the relay KA1 and the relay KA2; the controller is respectively connected to the pressure sensor, the oil level sensor, the relay KA1, the relay KA2, the oil pump contactor and the pressure relief solenoid valve.

[0010] As a preferred option, in a fatigue hydraulic system for a gas cylinder, the normally closed contact of relay KA1 is first connected to the normally open contact of relay KA2, and then connected to the oil pump contactor KM1.

[0011] As a preferred option, a fatigue hydraulic system for a gas cylinder, the fatigue hydraulic system also includes an input power supply, a circuit breaker QF1, a circuit breaker QF2 and a switching power supply connected in sequence.

[0012] As a preferred option, in a fatigue hydraulic system for a gas cylinder, the input power supply is an AC380V power supply.

[0013] As a preferred option, a fatigue hydraulic system for a gas cylinder, the model of the switching power supply is EDR-200-24.

[0014] As a preferred option, in a fatigue hydraulic system for a gas cylinder, the model of the circuit breaker QF1 is 3P / 32A, the model of the circuit breaker QF2 is 2P / 6A, and the model of the circuit breaker QF3 is 3P / 16A.

[0015] It should be further explained that the technical features corresponding to the various options of the above system can be combined or replaced with each other to form a new technical solution without conflict.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] When the oil level sensor of the utility model, which is responsible for detecting the oil level of the oil pump, detects that the oil level is too low, the oil level sensor signal is disconnected, the relay KA2 coil loses power, the contacts of the relay KA2 are disconnected, and the coil of the oil pump contactor KM1 loses power, causing the oil pump to stop, thereby achieving the purpose of stopping the pump for protection when the oil level is too low. The pressure sensor is responsible for detecting the pressure in the gas cylinder and transmitting the detected pressure value to the controller. When the pressure in the gas cylinder exceeds the set pressure of the intelligent controller, the intelligent controller outputs a signal to the coil of the relay KA1, the relay KA1 coil is energized, the normally closed contact of the relay KA1 becomes disconnected, and the oil pump stops running. At this time, the normally open contact of the relay KA1 coil becomes closed, and the pressure relief solenoid valve YV1 is continuously powered to relieve pressure, thereby achieving the purpose of stopping the pump for pressure relief protection when the pressure in the cylinder exceeds the set value. Ensure the safety of the oil pump and gas cylinder when the fatigue hydraulic system is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The specific implementation methods of the present invention are further described in detail below in conjunction with the accompanying drawings. The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The same reference numerals are used in these drawings to represent the same or similar parts. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0019] Figure 1 This is a structural schematic diagram of a fatigue hydraulic system for a gas cylinder shown in an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of power input according to an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the connection between the oil pump and the oil pump contactor shown in the embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the connection between the controller and the relay KA1 shown in an embodiment of the utility model;

[0023] Figure 5This is a schematic diagram of the connection between the relay KA2 and the oil level sensor shown in the embodiment of the utility model;

[0024] Figure 6 This is a control logic diagram of relay KA1, relay KA2 and oil pump contactor shown in an embodiment of the utility model;

[0025] Figure 7 It is a schematic diagram of pressure relief shown in an embodiment of the utility model. DETAILED DESCRIPTION

[0026] The technical solution of the utility model is described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that the directions or positional relationships indicated by "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the directions or positional relationships described in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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. In addition, "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Reference Figure 1 In an exemplary embodiment, a fatigue hydraulic system for a gas cylinder is provided, comprising:

[0031] Controller;

[0032] A pressurization and pressure relief circuit, comprising a pressure sensor, a relay KA1 and a pressure relief solenoid valve arranged in the gas cylinder;

[0033] The oil pump protection circuit includes an oil level sensor and a relay KA2 arranged in the oil tank;

[0034] The oil pump contactor is connected to the contacts of the relay KA1 and the relay KA2; the controller is respectively connected to the pressure sensor, the oil level sensor, the relay KA1, the relay KA2, the oil pump contactor and the pressure relief solenoid valve.

[0035] Specifically, the working principle of the oil pump protection circuit is as follows:

[0036] like Figure 5 As shown in the figure, when the oil level sensor responsible for detecting the oil level of the oil pump detects that the oil level is too low, the oil level sensor signal is disconnected, the relay KA2 coil loses power, and the normally open contact of the relay KA2 closed by the coil is disconnected, as shown in the figure. Figure 6 As shown in the figure, the coil of the oil pump contactor KM1 loses power, causing the oil pump to stop, achieving the purpose of stopping the pump when the oil level is too low. Among them, the coil of the relay KA2 is always in the energized state when the oil level is normal.

[0037] The working principle of the pressure relief circuit is as follows:

[0038] like Figure 4 As shown in the figure, the pressure sensor is responsible for detecting the pressure in the gas cylinder and transmitting the detected pressure value to the intelligent controller. When the pressure in the gas cylinder exceeds the set pressure of the intelligent controller, the intelligent controller outputs a signal to the coil of relay KA1, the coil of relay KA1 is energized, and the normally closed contact of relay KA1 becomes open. Figure 6 As shown, when the normally closed contact of relay KA1 is disconnected, the coil of the oil pump contactor KM1 that controls the oil pump loses power and is no longer energized, and the oil pump stops running.

[0039] Furthermore, if Figure 7 As shown, at this time, the normally open contact of the relay KA1 coil becomes closed, and the pressure relief solenoid valve YV1 is continuously powered to relieve pressure, so as to achieve the purpose of stopping the pump and performing pressure relief protection when the pressure in the bottle exceeds the set value.

[0040] Furthermore, when the oil pump contactor is connected to the contacts of the relay KA1 and the relay KA2, the normally closed contact of the relay KA1 is first connected to the normally open contact of the relay KA2 and then connected to the oil pump contactor KM1.

[0041] Furthermore, if Figure 2As shown, the fatigue hydraulic system also includes an input power supply, a circuit breaker QF1, a circuit breaker QF2 and a switch power supply which are connected in sequence. The input power supply is an AC380V power supply, the model of the switch power supply is EDR-200-24, the output of the circuit breaker QF1 is connected to the oil pump contactor KM1 through the circuit breaker QF3, and the output end of the oil pump contactor KM1 is connected to the oil pump (such as Figure 3 ). Relay KA1 is connected between the switching power supply and circuit breaker QF2 to supply power to relay KA1. The 24V port of the switching power supply is connected to relay KA2 to supply power to relay KA2.

[0042] Further, the model of the circuit breaker QF1 is 3P / 32A, the model of the circuit breaker QF2 is 2P / 6A, and the model of the circuit breaker QF3 is 3P / 16A. The model of the controller is, the model of the pressure sensor is, the model of the relay KA1 is, the model of the pressure relief solenoid valve YV1 is, the model of the oil level sensor is, and the model of the relay KA2 is.

[0043] The above specific implementation methods are detailed descriptions of the present utility model. It cannot be determined that the specific implementation methods of the present utility model are limited to these descriptions. For ordinary technicians in the technical field to which the present utility model belongs, they can make several simple deductions and substitutions without departing from the concept of the present utility model, which should be regarded as belonging to the protection scope of the present utility model.

Claims

1. A fatigue hydraulic system for a gas cylinder, characterized in that: include: Controller; A pressurization and pressure relief circuit, comprising a pressure sensor, a relay KA1 and a pressure relief solenoid valve arranged in the gas cylinder; The oil pump protection circuit includes an oil level sensor and a relay KA2 arranged in the oil tank; The oil pump contactor is connected to the contacts of the relay KA1 and the relay KA2; the controller is respectively connected to the pressure sensor, the oil level sensor, the relay KA1, the relay KA2, the oil pump contactor and the pressure relief solenoid valve.

2. A fatigue hydraulic system for a gas cylinder according to claim 1, characterized in that: The normally closed contact of relay KA1 is first connected to the normally open contact of relay KA2, and then connected to the oil pump contactor KM1.

3. A fatigue hydraulic system for a gas cylinder according to claim 1, characterized in that: The fatigue hydraulic system also includes an input power supply, a circuit breaker QF1, a circuit breaker QF2 and a switching power supply which are connected in sequence.

4. A fatigue hydraulic system for a gas cylinder according to claim 3, characterized in that: The input power supply is AC380V power supply.

5. A fatigue hydraulic system for a gas cylinder according to claim 3, characterized in that: The model of the switching power supply is EDR-200-24.

6. A fatigue hydraulic system for a gas cylinder according to claim 3, characterized in that: The model of the circuit breaker QF1 is 3P / 32A, the model of the circuit breaker QF2 is 2P / 6A, and the model of the circuit breaker QF3 is 3P / 16A.

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