Remote pressure relief device for pressure test pump

Abstract

The utility model discloses a remote pressure relief device for a pressure test pump. The remote pressure relief device comprises an actuating mechanism and a control mechanism, the execution mechanism comprises a motor and a reduction gearbox connected with an output shaft of the motor, and the reduction gearbox is fixedly arranged on the pressure test pump and connected with a pressure relief switch shaft of the pressure test pump; the control mechanism comprises a remote control unit and a local control unit, and the remote control unit and the local control unit are connected through a LoRa wireless module so as to realize bidirectional wireless data transmission; and the local control unit is in signal connection with the motor through the motor controller. According to the utility model, automatic remote control is used for replacing manual operation to relieve pressure of the pressure test pump, so that personnel are prevented from working in a high-pressure area, threats to personnel caused by potential safety hazards such as high-pressure leakage, pipeline explosion and mechanical injury during working in the high-pressure area are eliminated, and the operation safety of the pressure test pump is greatly improved. The pressure test pump pressure relief device is suitable for pressure test of well control equipment and is used for pressure relief operation of a pressure test pump.

Description

Technical Field

[0001] The utility model belongs to the technical field of petroleum exploration and relates to remote pressure relief of a pressure test pump after pressure testing of well control equipment, in particular to a remote pressure relief device for a pressure test pump. Background Art

[0002] The pressure test of well control equipment is a very important link on site, and it is an important means to test the working performance of well control equipment and the installation quality of well control equipment. The pressure test of well control equipment must be carried out when the installation of well control equipment is completed, the well control equipment is overhauled, the well control equipment is replaced, and important parts are replaced. The pressure test operation belongs to the dangerous control operation, and there are strict technical requirements and safety requirements for the pressure test operation. For example, for the 2ZF35-70 double gate blowout preventer, the test pressure value should be 70MPa, the pressure stabilization time should be no less than 10min, and the pressure drop should not be greater than 0.7MPa.

[0003] During the pressure test operation, the operation and monitoring of the pressure test pump can be completed in a safe area, but manual operation must be performed at the pressure test pump during pressure relief. Therefore, there are safety hazards such as high-pressure leakage, pipeline shaking, and machinery injuring people during the pressure relief process. Utility Model Content

[0004] In order to solve the above deficiencies existing in the prior art, the utility model aims to provide a remote pressure relief device for a pressure test pump, so as to achieve the purpose of improving the safety performance of the pressure test pump operation.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a remote pressure relief device for a pressure test pump, comprising an actuator and a control mechanism; the actuator comprises a motor and a reduction box connected to the output shaft of the motor, the reduction box is fixed on the pressure test pump and connected to the pressure relief switch shaft of the pressure test pump;

[0006] The control mechanism includes a remote control unit and a local control unit, and the remote control unit and the local control unit are connected via a LoRa wireless module to achieve two-way wireless data transmission;

[0007] The local control unit is connected to the motor signal through the motor controller.

[0008] As defined in the present invention, the reduction gearbox includes a housing and a first gear and a second gear assembled and meshed in the housing; the first gear is assembled in the housing through a connecting sleeve, and the second gear is assembled on the pressure relief switch shaft of the pressure test pump.

[0009] As a further limitation of the present invention, both ends of the connecting sleeve are rotatably connected in the box body through support bearings; the axial through hole of the connecting sleeve is D-shaped;

[0010] The motor output shaft is a D-shaped motor shaft adapted to the axial through hole of the connecting sleeve.

[0011] As a further limitation of the present invention, the gear modules of the first gear and the second gear are both 1.5, and the transmission ratio of the first gear and the second gear is 3:1 or 4:1.

[0012] As a further limitation of the present invention, the motor is a stepper motor.

[0013] As another limitation of the present invention, both the remote control unit and the local control unit use a single-chip microcomputer equipped with a 32-bit ARM processor.

[0014] As a further limitation of the present invention, an encoder for feeding back the actual operation status of the motor is also included, and the encoder is connected to the motor controller signal.

[0015] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0016] The utility model uses a wirelessly connected remote control unit and a local control unit to remotely control the operation of the motor. The power acts on the pressure relief switch shaft of the pressure test pump through the reduction box, driving the pressure relief switch shaft to rotate, and realizing the control of the pressure relief valve. The utility model replaces manual operation with automated remote control, avoiding personnel working in high-pressure areas, eliminating the threat to personnel from safety hazards such as high-pressure leakage, pipeline explosion, and mechanical damage in high-pressure area operations, and greatly improving the safety of pressure test pump operation.

[0017] The utility model is suitable for use in pressure testing of well control equipment and is used for pressure relief operation of a pressure testing pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the installation structure of the embodiment of the utility model on the hydraulic block of the pressure test pump;

[0020] Figure 2 This is a schematic diagram of the connection structure between the motor and the reduction gearbox in the embodiment of the utility model;

[0021] Figure 3 This is a control principle diagram of an embodiment of the utility model;

[0022] In the figure: 1. Motor; 2. Reducer; 3. Hydraulic block; 4. Pressure relief switch shaft; 5. Box body; 6. First gear; 7. Second gear; 8. Support bearing; 9. Motor output shaft. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and understand the present invention, and are not used to limit the present invention.

[0024] This embodiment includes an actuator and a control mechanism, wherein the actuator includes a motor 1 and a reduction box 2 connected to a motor output shaft 9. When in use, the reduction box 2 is fixed on the pressure test pump and connected to the pressure relief switch shaft 4 of the pressure relief valve of the pressure test pump, and the motor 1 is remotely controlled to operate through the control mechanism to drive the reduction box 2 to open or close the pressure relief valve.

[0025] like Figure 1 to Figure 2 As shown, the reduction box 2 includes a housing 5 and a first gear 6 and a second gear 7 assembled and meshed in the housing 5. The housing 5 is fixed to the hydraulic block 3 of the pressure test pump by bolts; the first gear 6 is assembled on the connecting sleeve, and both ends of the connecting sleeve are rotatably connected in the housing 5 through the supporting bearings 8, so that the first gear 6 is rotatably assembled in the housing 5; the central through hole of the second gear 7 is a square hole, and the second gear 7 is assembled on the pressure relief switch shaft 4 of the pressure relief valve of the pressure test pump by means of the square hole, and is located inside the housing 5.

[0026] Furthermore, the axial through hole of the connecting sleeve is D-shaped.

[0027] The motor 1 is a stepper motor, and the motor output shaft 9 is a D-type motor shaft adapted to the above-mentioned axial through hole. The motor 1 is fixedly arranged outside the box 5, and the motor output shaft 9 is assembled in the axial through hole of the connecting sleeve. When the motor 1 is running, it drives the connecting sleeve to rotate, the connecting sleeve drives the first gear 6 to rotate, the first gear 6 drives the second gear 7 to rotate, and the second gear 7 drives the pressure relief switch shaft 4 to rotate, so as to realize the switch control of the pressure relief valve.

[0028] In this embodiment, the gear modules of the first gear 6 and the second gear 7 in the reduction box 2 are both 1.5, and the transmission ratio of the first gear 6 and the second gear 7 is 3:1 or 4:1.

[0029] The control mechanism includes a remote control unit and a local control unit. The local control unit is fixed on the housing 5 of the reduction box 2. The core of the remote control unit is a single-chip microcomputer equipped with a 32-bit ARM processor, model STM32F103C8, and is equipped with a LoRa wireless module, buttons, and a 4-inch Diwen industrial touch screen. The core of the local control unit is also a single-chip microcomputer equipped with a 32-bit ARM processor, model STM32F103C8, and is equipped with a LoRa wireless module and an OLDE display. Among them, the configured OLED display can display wireless communication status, current motor operation and forward and reverse status, alarm status, number of pulses received, actual number of laps and remaining angles, set number of laps and remaining angles, number of laps of the last operation and remaining angles, and other information.

[0030] The remote control unit and the local control unit are connected via a LoRa wireless module to achieve two-way wireless data transmission.

[0031] It should be supplemented here that the motor 1 in this embodiment is equipped with a motor controller and an encoder, wherein the encoder is connected to the motor controller signal for feeding back the actual operation of the motor 1. The motor controller in this embodiment is model HBS808C.

[0032] The local control unit is connected to the motor 1 signal through the motor controller to achieve control of the motor 1.

[0033] When doing specific work, refer to Figure 3 , the number of rotations of the pressure relief switch shaft 4 required for the actual opening and closing of the pressure relief valve and the number of pulses corresponding to the remaining angle value are input into the remote control unit; the remote control unit directly sends the corresponding enable (ENA), forward and reverse (DIR), pulse number (PUL) and other commands to the local control unit through the LoRa wireless module according to the user's switch command; after receiving the relevant commands, the local control unit first controls the level changes of the enable (ENA) and forward and reverse (DIR) terminals of the motor controller through the IO port, and then controls the timer to send the specified number of pulses (PUL) to the motor controller through PA3; finally, the motor 1 is controlled to reduce speed and increase torque through the reduction box 2, and then the pressure relief switch shaft 4 is operated to rotate to perform the opening and closing operation of the pressure relief valve.

[0034] During the operation of motor 1, once an abnormality occurs, the working current of motor 1 will exceed the set value. At this time, the motor controller will send an alarm (ALARM) level signal to the local control unit, and the local control unit will then send the signal to the remote control unit through the LoRa wireless module. After receiving the information, the remote control unit will immediately issue an audible and visual alarm, and at the same time send a stop instruction for motor 1 through the LoRa wireless module.

[0035] It should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A remote pressure relief device for a pressure test pump, characterized in that: It includes an actuator and a control mechanism; the actuator includes a motor and a reduction box connected to the motor output shaft, and the reduction box is fixed on the pressure test pump and connected to the pressure relief switch shaft of the pressure test pump; The control mechanism includes a remote control unit and a local control unit, and the remote control unit and the local control unit are connected via a LoRa wireless module to achieve two-way wireless data transmission; The local control unit is connected to the motor signal through the motor controller.

2. A remote pressure relief device for a pressure test pump according to claim 1, characterized in that: The reduction box comprises a box body and a first gear and a second gear assembled and meshed in the box body; the first gear is assembled in the box body through a connecting sleeve, and the second gear is assembled on the pressure relief switch shaft of the pressure test pump.

3. A remote pressure relief device for a pressure test pump according to claim 2, characterized in that: The two ends of the connecting sleeve are rotatably connected in the box body through supporting bearings; the axial through hole of the connecting sleeve is D-shaped; The motor output shaft is a D-shaped motor shaft adapted to the axial through hole of the connecting sleeve.

4. A remote pressure relief device for a pressure test pump according to claim 2 or 3, characterized in that: The gear modules of the first gear and the second gear are both 1.5, and the transmission ratio of the first gear and the second gear is 3:1 or 4:

1.

5. A remote pressure relief device for a pressure test pump according to claim 4, characterized in that: The motor is a stepper motor.

6. A remote pressure relief device for a pressure test pump according to any one of claims 1 to 3 and 5, characterized in that: Both the remote control unit and the local control unit use a single-chip microcomputer equipped with a 32-bit ARM processor.

7. A remote pressure relief device for a pressure test pump according to claim 6, characterized in that: It also includes an encoder for feeding back the actual operation status of the motor, and the encoder is connected to the motor controller signal.

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