Hydraulic motor control valve group used in hydraulic system in explosive environment

Abstract

The utility model relates to a hydraulic motor control valve group used in a hydraulic system in an explosion environment, which comprises an overflow valve, an explosion-proof electromagnetic directional valve, an explosion-proof proportional overflow valve, an oil inlet P1 of the control valve group and an oil return port T1 of the control valve group, wherein one end of the overflow valve 1 is communicated with the oil inlet P1 of the control valve group, and the other end of the overflow valve 1 is communicated with the explosion-proof electromagnetic directional valve; one end of the anti-explosion electromagnetic directional valve is communicated with an oil inlet P1 of the control valve group, and the other end of the anti-explosion electromagnetic directional valve is communicated with one end of the anti-explosion proportional overflow valve; a first port B1 of the overflow valve, a second port T2 of the anti-explosion electromagnetic directional valve and a third port B2 of the anti-explosion proportional overflow valve 3 are all communicated with an oil return port T1 of the control valve group; an oil inlet P1 of the control valve group and an oil return opening T1 of the control valve group are connected with the two ends of the hydraulic motor.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic motor control, and in particular relates to a hydraulic motor control valve group used in a hydraulic system under an explosive environment. Background Art

[0002] In offshore platforms, hydraulic motors are often used for various operations, including drilling, pipeline operation and machinery control. In explosive environments, the safety and reliability of hydraulic motors are particularly important. These applications require hydraulic motors to provide precise torque control under different operating conditions to ensure smooth operations and safe operation of equipment.

[0003] An explosion-proof proportional valve is a device that can be used safely in explosive environments and is used to more finely control pressure and flow. However, the regulating pressure of explosion-proof proportional valves at home and abroad is usually limited to below 35MPa. For applications that require higher operating pressures (such as above 37Mpa), there is still a lack of suitable solutions.

[0004] Based on the above problems, the utility model proposes a hydraulic motor control valve group used in a hydraulic system in an explosive environment. Utility Model Content

[0005] The purpose of the utility model is to provide a hydraulic motor control valve group for a hydraulic system in an explosive environment. In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A hydraulic motor control valve group used in a hydraulic system in an explosive environment, comprising a relief valve, an explosion-proof electromagnetic reversing valve and an explosion-proof proportional relief valve, the control valve group having an oil inlet P1 and an oil return port T1:

[0007] One end of the relief valve is connected to the oil inlet P1 of the control valve group, and the other end thereof is connected to the explosion-proof electromagnetic reversing valve;

[0008] One end of the explosion-proof electromagnetic reversing valve is connected to the oil inlet P1 of the control valve group, and the other end thereof is connected to one end of the explosion-proof proportional relief valve;

[0009] The first port B1 of the relief valve, the second port T2 of the explosion-proof electromagnetic reversing valve and the third port B2 of the explosion-proof proportional relief valve are all connected to the oil return port T1 of the control valve group;

[0010] The oil inlet P1 of the control valve group and the oil return port T1 of the control valve group are connected to both ends of the hydraulic motor.

[0011] Furthermore, the adjustment pressure value of the explosion-proof proportional relief valve is set to 0-35Mpa.

[0012] Furthermore, the pressure value of the overflow valve is set to 37Mpa.

[0013] Furthermore, the relief valve includes a relief valve main plug, the fourth port A1 of the relief valve main plug is respectively connected to the oil inlet P1 of the control valve group and the explosion-proof electromagnetic reversing valve, and the relief valve is provided with a fifth port X for setting the pressure value, and the fifth port X is connected to the explosion-proof electromagnetic reversing valve.

[0014] Furthermore, the explosion-proof electromagnetic reversing valve is provided with a sixth port P2 and a seventh port A2 which are connected to each other, the sixth port P2 is connected to the oil inlet P1 of the control valve group and the fifth port X, and the seventh port A2 is connected to the explosion-proof proportional relief valve.

[0015] Furthermore, the third port B2 of the explosion-proof proportional relief valve is connected to the eighth port A3, the eighth port A3 is connected to the seventh port A2, and the third port B2 is connected to the oil return port T1 of the control valve group. The utility model adopts the above technical solution, which has the following advantages:

[0016] Compared with the existing technology, the utility model is a hydraulic motor control valve group used in a hydraulic system in an explosive environment. The explosion-proof proportional relief valve realizes continuous adjustment of the pressure of the hydraulic system within the range of 0-35MPa through proportional adjustment, thereby accurately controlling the torque output of the hydraulic motor and solving the problem of torque proportional adjustment of the hydraulic motor in an explosive environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the prior art.

[0018] Figure 2 The utility model is a structural schematic diagram of a hydraulic motor control valve group in a hydraulic system used in an explosive environment.

[0019] The reference numerals are as follows: 1- overflow valve, 101- overflow valve cover plate, 102- overflow valve main plug, 2- explosion-proof electromagnetic reversing valve, 3- explosion-proof proportional overflow valve, 4- plug-in overflow valve. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings to describe the preferred embodiments of the present invention in detail, so as to more clearly understand the purpose, characteristics and advantages of the present invention. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0021] like Figure 1As shown. In the prior art, a manual pressure regulating cartridge relief valve is usually used to limit the motor torque. The cartridge relief valve 4 can manually adjust the pressure of 0-42Mpa, and cannot be replaced after adjustment. In a non-explosion-proof environment, the proportional pressure of the hydraulic motor can be adjusted to a maximum of 42MPa, and there is no problem in adjusting it to 37MPa. However, in an explosion-proof environment, the maximum pressure of the explosion-proof proportional valve can be adjusted to 35MPa, which cannot reach 37MPa.

[0022] Since the existing technology uses a fixed-value pressure regulation, once the pressure value is set, the maximum torque value of the motor cannot be changed. Products where users have proportional requirements for motor torque cannot be proportionally adjusted in an explosion-proof environment.

[0023] like Figure 2 As shown. The utility model proposes a hydraulic motor control valve group for a hydraulic system in an explosive environment, comprising a relief valve 1, an explosion-proof electromagnetic reversing valve 2, an explosion-proof proportional relief valve 3, an oil inlet P1 of the control valve group and an oil return port T1 of the control valve group: one end of the relief valve 1 is connected to the oil inlet P1 of the control valve group, and the other end thereof is connected to the explosion-proof electromagnetic reversing valve 2; one end of the explosion-proof electromagnetic reversing valve 2 is connected to the oil inlet P1 of the control valve group, and the other end thereof is connected to one end of the explosion-proof proportional relief valve 3; the first port B1 of the relief valve 1, the second port T2 of the explosion-proof electromagnetic reversing valve 2 and the third port B2 of the explosion-proof proportional relief valve 3 are all connected to the oil return port T1 of the control valve group; the oil inlet P1 of the control valve group and the oil return port T1 of the control valve group are connected to the two ends of the hydraulic motor. The explosion-proof electromagnetic reversing valve 2 is used to cut off the connecting oil circuit between the relief valve 1 and the explosion-proof proportional relief valve 3, so that the pressure of the hydraulic system is controlled by the pressure set by the relief valve 1, thereby realizing the control of the maximum torque of the hydraulic motor.

[0024] Specifically, the adjustment pressure value of the explosion-proof proportional relief valve 3 is set to 0-35Mpa; the explosion-proof proportional relief valve realizes continuous adjustment of the pressure of the hydraulic system within the range of 0-35MPa through proportional adjustment, thereby accurately controlling the torque output of the hydraulic motor and solving the problem of torque proportional adjustment of the hydraulic motor in an explosive environment.

[0025] Specifically, the relief valve 1 includes a relief valve cover plate 101 and a relief valve main plug 102, the fourth port A1 of the relief valve main plug 102 is respectively connected to the oil inlet P1 of the control valve group and the explosion-proof electromagnetic reversing valve 2, the relief valve cover plate 101 is provided with a fifth port X for setting the pressure value, the fifth port X is connected to the explosion-proof electromagnetic reversing valve 2, and the relief valve main plug 102 is provided with a spring chamber for connecting with the fifth port X.

[0026] Specifically, the explosion-proof electromagnetic reversing valve 2 is provided with a sixth port P2 and a seventh port A2 which are interconnected. The sixth port P2 is connected to the oil inlet P1 and the fifth port X of the control valve group, and the seventh port A2 is connected to the explosion-proof proportional relief valve 3; when the explosion-proof electromagnetic reversing valve 2 receives the control signal of the hydraulic system, it can quickly switch the oil circuit to switch the hydraulic system pressure between proportional regulation of 0-35Mpa and control at 37Mpa, thereby meeting the torque control requirements of the hydraulic motor under different working conditions.

[0027] Specifically, the third port B2 and the eighth port A3 of the explosion-proof proportional relief valve 3 are communicated with each other, the eighth port A3 is communicated with the seventh port A2, and the third port B2 is communicated with the oil return port T1 of the control valve group.

[0028] Specifically, the oil inlet P1 of the control valve group is connected with the fourth port A1 of the relief valve main plug 102 and the sixth port P2 of the explosion-proof electromagnetic reversing valve 2, the sixth port P2 of the explosion-proof electromagnetic reversing valve 2 is connected with the seventh port A2 of the explosion-proof electromagnetic reversing valve 2, and the seventh port A2 of the explosion-proof electromagnetic reversing valve 2 is connected with the eighth port A3 of the explosion-proof proportional relief valve 3. The pressure oil connected with the hydraulic motor enters the fourth port A1 of the relief valve main plug 102 through the oil inlet P1 of the control valve group, flows from the fourth port A1 through the sixth port P2 to the seventh port A2 of the explosion-proof electromagnetic reversing valve, and enters the eighth port A3 of the explosion-proof proportional relief valve 3 from the seventh port A2. The pressure value of this oil circuit is adjusted by control, and transmitted to the spring chamber of the relief valve main plug from the fifth port X of the relief valve 1, so that the pressure value of the fourth port A1 of the relief valve main plug, that is, the pressure value (torque value) of the hydraulic motor can be proportionally adjusted.

[0029] Specifically, the oil inlet P1 of the control valve group is connected to the fourth port A1 of the relief valve main plug 102 and the sixth port P2 of the explosion-proof electromagnetic reversing valve 2, and the sixth port P2 of the explosion-proof electromagnetic reversing valve 2 is connected to the fifth port X of the relief valve 1. Through the reversal of the explosion-proof electromagnetic reversing valve 2, the hydraulic oil from the oil inlet P1 of the control valve group is no longer connected to the explosion-proof proportional relief valve 3, but directly enters from the fifth port X of the relief valve 1, and the pressure is controlled by the 37MPa pressure value set by the relief valve 1, so that the pressure value of the fourth port A1 of the relief valve main plug is the 37MPa pressure value set by the relief valve 1, that is, the maximum pressure value (maximum torque value) of the hydraulic motor.

[0030] In this embodiment, the relief valve 1 is used as the main component, and the pilot pressure is transmitted to the explosion-proof proportional relief valve 3 through the explosion-proof electromagnetic reversing valve 2. The user's demand for proportional adjustment of the hydraulic motor torque is realized by proportional adjustment of the explosion-proof proportional relief valve 3 (0-35Mpa).

[0031] In this embodiment, the explosion-proof electromagnetic reversing valve 2 cuts off the connecting oil circuit between the relief valve 1 and the explosion-proof proportional relief valve 3, so that the pressure of the hydraulic motor receives the pressure set by the relief valve 1, 37 MPa, realizing the user's demand for the maximum torque of the hydraulic motor.

Claims

1. A hydraulic motor control valve group used in a hydraulic system in an explosive environment, characterized in that: It comprises a relief valve (1), an explosion-proof electromagnetic reversing valve (2) and an explosion-proof proportional relief valve (3), wherein the control valve group has an oil inlet P1 and an oil return port T1; One end of the overflow valve (1) is connected to the oil inlet P1, and the other end thereof is connected to the explosion-proof electromagnetic reversing valve (2); One end of the explosion-proof electromagnetic reversing valve (2) is connected to the oil inlet P1, and the other end thereof is connected to one end of the explosion-proof proportional relief valve (3); The first port B1 of the relief valve (1), the second port T2 of the explosion-proof electromagnetic reversing valve (2) and the third port B2 of the explosion-proof proportional relief valve (3) are all connected to the oil return port T1; The oil inlet P1 and the oil return port T1 are connected to two ends of the hydraulic motor.

2. The hydraulic motor control valve group for a hydraulic system in an explosive environment according to claim 1, characterized in that: The explosion-proof proportional relief valve (3) is set to a regulating pressure value of 0-35 MPa.

3. The hydraulic motor control valve group for a hydraulic system in an explosive environment according to claim 2, characterized in that: The pressure value set for the overflow valve (1) is 37 MPa.

4. The hydraulic motor control valve group for a hydraulic system in an explosive environment according to claim 3, characterized in that: The relief valve (1) comprises a relief valve main plug (102), a fourth port A1 of the relief valve main plug (102) being respectively connected to the oil inlet P1 and the explosion-proof electromagnetic reversing valve (2), and a fifth port X for setting a pressure value is provided on the relief valve (1), and the fifth port X is connected to the explosion-proof electromagnetic reversing valve (2).

5. The hydraulic motor control valve group for a hydraulic system in an explosive environment according to claim 4, characterized in that: The explosion-proof electromagnetic reversing valve (2) is provided with a sixth port P2 and a seventh port A2 which are connected to each other, the sixth port P2 is connected to the oil inlet P1 and the fifth port X, and the seventh port A2 is connected to the explosion-proof proportional relief valve (3).

6. The hydraulic motor control valve group for a hydraulic system in an explosive environment according to claim 5, characterized in that: The third port B2 and the eighth port A3 of the explosion-proof proportional relief valve (3) are communicated with each other, the eighth port A3 is communicated with the seventh port A2, and the third port B2 is communicated with the oil return port T1.

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