Interlocking protection device for preventing sluice valve closing from causing pump suffocation of slurry pump

Abstract

The utility model provides an interlocking protection device for preventing a slurry pump from being blocked due to closing of a gate valve, and relates to the technical field of safety auxiliary equipment for pumps and high-pressure pipelines. Comprising a host, an actuator and a wireless detector, the actuator and the wireless detector are respectively connected with the host, the actuator is connected between a power supply and a power interface of a slurry pump, and the wireless detector is arranged at a gate valve installed on a slurry circulation pipeline connected with the slurry pump. According to the utility model, automatic interlocking control of the gate valves and the slurry pump can be realized, so that the slurry pump can be effectively prevented from being started by mistake under the condition that all the corresponding gate valves are not completely opened; on the basis, the problem that in the prior art, under the condition that all the corresponding high-pressure gate valves in the high-pressure pipeline are not completely opened, the pump opening operation of the slurry pump is directly carried out, then the pump suffocating situation is caused, and potential safety hazards or safety accidents are caused is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of safety auxiliary equipment for pumps and high-pressure pipelines, and particularly relates to an interlock protection device for preventing a mud pump from being blocked due to the closing of a gate valve. Background Technique

[0002] At a drilling construction site, a mud pump is required to transport liquids such as mud or water to the bottom of the well to achieve important functions such as maintaining circulation, cooling the drill bit, and cleaning the bottom of the well. The mud pump transports mud through a high-pressure pipeline and a high-pressure gate valve. When starting the mud pump, all corresponding high-pressure gate valves in the high-pressure pipeline must be opened in advance to prevent the occurrence of pump blocking.

[0003] However, in actual operation scenarios, due to the complexity of the drilling process, it is necessary to frequently open and close valves to switch the manifold flow path; during this period, it is very easy for operators to make improper operations or communication errors, etc., which will further lead to inaccurate control of the opening and closing states of the high-pressure gate valves; based on this, there will be a situation where the pump is directly started under the condition that all corresponding high-pressure gate valves are not fully opened, which will lead to a sharp increase in the pressure of the high-pressure pipeline and cause the mud pump to be blocked, and thus it is very likely to further cause a serious accident endangering personal and equipment safety after the high-pressure pipeline bursts.

[0004] In recent years, although some mud pump anti-blocking devices have gradually appeared on the market, most of them judge whether there is pump blocking by detecting the operating pressure of the mud pump. For example, the Chinese patent with the publication number CN207406448U provides a mud pump anti-blocking power transmission mechanism, and its working principle is that when the pressure sensor detects that the operating pressure of the mud pump is too high and is likely to cause pump blocking, it controls the mud pump to stop. This method takes effect after the mud pump is started, and does not control whether the mud pump is started according to the opening and closing states of all corresponding high-pressure gate valves, so there is a certain lag; and even if the effect of timely stopping is achieved, it is not a stop judgment based on the opening and closing states of all corresponding high-pressure gate valves, so the problem of pump blocking caused by the fact that all corresponding high-pressure gate valves are not fully opened before the mud pump is started cannot be fundamentally solved. Content of the Utility Model

[0005] The purpose of the utility model is to provide an interlock protection device for preventing a mud pump from being blocked due to the closing of a gate valve, so as to solve the problem mentioned in the above background technique that in the prior art, it is easy to directly start the mud pump under the condition that all corresponding high-pressure gate valves in the high-pressure pipeline are not fully opened, which will lead to the occurrence of pump blocking, thus causing potential safety hazards or safety accidents.

[0006] The utility model is realized by adopting the following technical solutions:

[0007] An interlock protection device for preventing a mud pump from being blocked when a gate valve is closed, comprising a main unit, an actuator and a wireless detector. The signal output end of the main unit is connected to the signal receiving end of the actuator, and the signal receiving end of the main unit is connected to the signal output end of the wireless detector. The mud pump is connected to a power supply through the actuator, and the wireless detector is arranged at the gate valve installed on the mud circulation pipeline connected to the mud pump.

[0008] The device provided by the utility model can realize the automatic interlock control of the gate valve and the mud pump, and further can effectively avoid the mud pump from being accidentally started under the condition that all corresponding gate valves are not fully opened. Specifically: the switch information of all corresponding gate valves is obtained through the wireless detector and sent to the main unit; the main unit will conduct logical analysis and judgment on the received switch information according to the built-in working process information of the mud pipe manifold to generate an instruction to allow or prohibit starting the pump, and send the instruction to the actuator; after receiving the instruction, the actuator will interlock control whether to start the mud pump according to the content of the instruction.

[0009] Further, the wireless detector comprises a detector housing, a sensor, a detection circuit board, a detector wireless module, a battery and a detector antenna. The detection circuit board, the detector wireless module and the battery are arranged inside the detector housing, and the sensor and the detector antenna are arranged outside the detector housing; the signal output end of the sensor is connected to the signal receiving end of the detection circuit board, the detector wireless module is respectively in communication connection with the communication end of the detection circuit board and the detector antenna, and the battery is connected to the power supply end of the detection circuit board.

[0010] Further, a protective thread is arranged on the top end of the gate valve. The protective thread is sleeved outside the gate valve stem located at the top end of the gate valve. The top end of the protective thread is higher than the gate valve stem and a through hole is opened on the top end. The end part of the sensor passes through and is installed in the through hole.

[0011] Further, the sensor is a proximity sensor or a ranging sensor or a magnetic sensor.

[0012] Further, the number of the wireless detectors is one or more.

[0013] Further, the actuator is a relay or an electric control air valve.

[0014] Further, the main unit comprises a main unit housing, a main control board, a main unit wireless module and a main unit antenna. The main control board and the main unit wireless module are arranged inside the main unit housing, and the main unit antenna is arranged outside the main unit housing; the actuator is connected to the main control board, and the wireless detector is connected to the main control board through the main unit antenna and the main unit wireless module.

[0015] Further, the host further includes a display screen disposed on the host housing, and the display screen is connected to the main control board.

[0016] The beneficial effects achieved by the present utility model are as follows:

[0017] A interlock protection device for preventing the mud pump from being blocked due to the closing of the gate valve is provided. By setting a host, an actuator and a wireless detector, the opening and closing information of the corresponding gate valve can be automatically obtained, and the startup of the mud pump can be interlock-controlled based on this opening and closing information. Compared with the prior art that relies on manual confirmation and cannot fundamentally solve the problem, the work of the present utility model is automated, and the interlock control of the gate valve and the mud pump can be realized. Furthermore, it can effectively prevent the mud pump from being accidentally started under the condition that all the corresponding gate valves are not fully opened, thereby preventing the occurrence of blocked pump situations and the potential safety hazards or safety accidents caused by them. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall structural schematic diagram of the interlock control device described in Embodiment 1 of the present utility model;

[0019] Figure 2 is the structural schematic diagram of the host in the interlock control device described in Embodiment 1 of the present utility model;

[0020] Figure 3 is the schematic diagram of the positional relationship between the wireless detector and the gate valve in the interlock control device described in Embodiment 1 of the present utility model;

[0021] In the figure: 1, host; 2, actuator; 3, wireless detector; 4, gate valve; 5, protective thread; 11, host housing; 12, main control board; 13, host wireless module; 14, host antenna; 15, display screen; 121, display interface; 122, wireless communication interface; 123, actuator interface; 31, detector housing; 32, detection circuit board; 33, detector wireless module; 34, detector antenna; 35, battery; 36, sensor; 41, gate valve stem. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0023] Embodiment 1

[0024] Please refer to Figure 1 , this embodiment provides an interlock protection device for preventing the mud pump from being blocked due to the closing of the gate valve, including a host 1, an actuator 2 and three wireless detectors 3. The host 1 and the actuator 2 are arranged in the driller's cabin, and the three wireless detectors 3 are arranged at the gate valves installed on the mud circulation pipeline connected to the mud pump. Specifically:

[0025] The mud pump, together with the surface pipe manifold, riser pipe, and gate valve, jointly constitutes the mud surface circulation system. Among them, the mud pump is connected to the surface pipe manifold, and the end of the surface pipe manifold is connected to the riser pipe; the riser pipe passes through the drill floor and is connected to the drill floor pipe manifold. The surface pipe manifold, riser pipe, and drill floor pipe manifold form the mud circulation pipeline, and gate valves are respectively installed on the surface pipe manifold, riser pipe, and drill floor pipe manifold; under the action of the mud pump, the mud will sequentially pass through the surface pipe manifold, riser pipe, and drill floor pipe manifold and enter the bottom of the well. Based on this, the three wireless detectors 3 in this embodiment are respectively arranged at the gate valves installed on the surface pipe manifold connected to the mud pump outlet, the gate valve installed on the riser pipe under the drill floor, and the gate valve installed on the drill floor pipe manifold.

[0026] Please refer to Figure 2 , the host 1 is an explosion-proof host. The host 1 includes a host housing 11, a main control board 12, a host wireless module 13, a host antenna 14, and a display screen 15; the main control board 12 and the host wireless module 13 are arranged inside the host housing 11, the host antenna 14 is arranged outside the host housing 11, and the display screen 15 is arranged on the host housing 11. Among them:

[0027] The main control board 12 is embedded with a high-performance 32-bit ARM microprocessor. There is a display interface 121, an actuator interface 123, and a wireless communication interface 122 on the main control board 12; the display interface 121 is connected to the display screen 15 through a four-core wire, the actuator interface 123 is connected to the actuator 2 through a two-core wire, and the wireless communication interface 122 is connected to the host 1 wireless module through a three-core wire. The host wireless module 13 is built-in with a high-quality radio frequency chip and adopts LORA spread spectrum modulation technology; the host wireless module 13 is connected to the host antenna 14 through a radio frequency cable. The display screen 15 is a TFT color touch display screen, and a speaker is provided thereon.

[0028] Please refer to Figure 3 , the structures of the three wireless detectors 3 are the same, including a detector housing 31, a sensor 36, a detection circuit board 32, a detector wireless module 33, a battery 35, and a detector antenna 34; the signal output end of the sensor 36 is connected to the signal receiving end of the detection circuit board 32, and the detector wireless module 33 is respectively connected to the communication end of the detection circuit board 32 and the detector antenna 34 for communication, and the battery 35 is connected to the power supply end of the detection circuit board 32; the detection circuit board 32, the detector wireless module 33, and the battery 35 are arranged inside the detector housing 31, and the sensor 36 and the detector antenna 34 are arranged outside the detector housing 31. Among them,

[0029] The sensor 36 is a ranging sensor. The detection circuit board 32 is embedded with a high-performance microprocessor. Based on the host 1 wireless module and the detector wireless module 33, the three wireless detectors 3 and the host 1 adopt a master-slave mode wireless communication, and the content transmitted by the wireless communication includes the gate valve switch information and the remaining battery capacity.

[0030] Please refer to Figure 3 , the structures on the three gate valves 4 are the same. A protective thread 5 is provided on the top end of the gate valve 4. The protective thread 5 is sleeved outside the gate valve stem 41 located at the top end of the gate valve 4. The top end of the protective thread 5 is higher than the gate valve stem 41 and a through hole is provided on the top end. The end of the sensor 36 in the wireless detector 3 passes through the through hole and then approaches the top end of the gate valve stem 41.

[0031] In addition, the actuator 2 is a relay, and the actuator 2 is used to realize the interlock control of the start and stop of the mud pump.

[0032] Based on the above structure, the working principle of this embodiment is as follows:

[0033] The three wireless detectors 3 respectively and real-time obtain the switch information of the three gate valves 4 installed at the outlet of the mud pump, on the riser pipe under the drill floor and on the riser pipe above the drill floor, and send the gate valve switch information and the remaining battery capacity in the wireless detector 3 to the host 1 through the detector wireless module 33 and the host wireless module 13. After receiving it, the host 1 displays the three gate valve switch information and the remaining battery capacity of the three wireless detectors 3 on the display screen 15 in the form of text and numerical values, and performs logical analysis and judgment on the gate valve switch information according to the built-in working process information of the mud pipe manifold to generate an instruction to allow or prohibit starting the pump. Specifically: If all three gate valves 4 are in the open state, it is regarded as meeting the pump starting condition, and an instruction to allow starting the pump is generated; if one or more of the three gate valves 4 are in the unopened state, it is regarded as not meeting the pump starting condition, and an instruction to prohibit starting the pump is generated. If an instruction to allow starting the pump is generated, the actuator 2 does not act and the mud pump starts; if an instruction to prohibit starting the pump is generated, the host 1 drives the actuator 2 to act to form an interlock control for the mud pump not to start, and at the same time drives the display screen 15 to give a reminder in the form of text and voice (the reminder content can be "The mud gate valve is not opened, prohibiting starting the pump!" etc., which is specifically set by the operator). Among them:

[0034] When the wireless detector 3 obtains the gate valve switch information, since the sensor 36 is a proximity sensor and the sensor 36 is located above the gate valve stem 41, the sensor 36 can obtain the height position information of the gate valve stem 41; when the gate valve 4 is in the open and closed states, the height position of the upper gate valve stem 41 on it is different, so the switch state information of the gate valve 4 can be further obtained from this.

[0035] When the actuator 2 interlocks and controls the mud pump, since the actuator 2 is a relay and the normally closed contact of the actuator 2 is connected between the power supply and the power interface of the mud pump, when the host 1 generates an instruction to allow the pump to start, the actuator 2 does not act, thus connecting the power supply to the power interface of the mud pump, so that the mud pump is powered on and starts; conversely, when the host 1 generates an instruction to prohibit the pump from starting, it will energize the actuator 2 to disconnect the normally closed contact, thus disconnecting the power supply from the power interface of the mud pump, so that the mud pump is not powered on and cannot start.

[0036] In summary, the interlock protection device for preventing the mud pump from being blocked due to the closing of the gate valve provided in this embodiment has the following advantages:

[0037] The host 1 and the wireless detector 3 adopt a master-slave wireless networking method, which is simple to install and maintain on-site; and because the network is easy to expand, it has great flexibility and can be used for the monitoring of the opening and closing states of gate valves in different types of high-pressure pipe manifolds and the interlock control of mud pumps.

[0038] The wireless detector 3 can work in a low-power mode, which can not only quickly detect the change of the opening and closing state of the valve, but also greatly reduce the power consumption. Moreover, the wireless detector 3 has the functions of interrupt wake-up and timed wake-up in the low-power working mode, and can send the valve opening and closing information and the remaining capacity of the battery 35 to the host 1 through timed wake-up to maintain communication with the host 1; accordingly, the host 1 can diagnose the communication link and clearly display the diagnosis information on the display screen 15, so that the operators can timely discover and eliminate faults, thus ensuring the working stability and reliability of this device.

[0039] In addition to being applicable to drilling mud pumps, this control device can also be widely applied to anti-blocking pump interlocks in similar construction sites such as oil well fracturing, injection water pump houses, and crude oil export pumps; among them, by setting the host 1, the actuator 2, and the wireless detector 3, the opening and closing information of the corresponding gate valve 4 can be automatically obtained, and through logical analysis, it can accurately judge whether the mud pump meets the pump-starting conditions, and interlock control the mud pump according to the judgment result to avoid the mud pump from starting up by mistake, and further can effectively prevent accidents such as high-pressure blockage of the pump and pipeline bursting, thus ensuring the safety of on-site equipment and personnel.

[0040] It should be specifically noted that the parts not detailed or described in detail in the above solutions are all prior arts, which do not belong to the improvements made by the present utility model to the prior art, nor do they belong to the protection scope of the technical solutions of the present utility model, so they will not be elaborated herein.

[0041] Certainly, the above content is only a preferred embodiment of the present utility model and cannot be considered as limiting the scope of the embodiments of the present utility model. The present utility model is not limited to the above examples either. Equivalent changes and improvements made by those of ordinary skill in the art within the essence of the present utility model shall fall within the scope covered by the patent of the present utility model.

Claims

1. An interlocking protection device for preventing a mud pump from being blocked due to gate valve closure, characterized in that: The invention comprises a host (1), an actuator (2) and a wireless detector (3), wherein the signal output end of the host (1) is connected to the signal receiving end of the actuator (2), the signal receiving end of the host (1) is connected to the signal output end of the wireless detector (3), the mud pump is connected to a power supply through the actuator (2), and the wireless detector (3) is arranged at a gate valve (4) installed on a mud circulation pipeline connected to the mud pump.

2. The interlocking protection device for preventing the slurry pump from being blocked due to the closure of the gate valve according to claim 1 is characterized in that: The wireless detector (3) comprises a detector housing (31), a sensor (36), a detection circuit board (32), a detector wireless module (33), a battery (35) and a detector antenna (34); the detection circuit board (32), the detector wireless module (33) and the battery (35) are arranged inside the detector housing (31), and the sensor (36) and the detector antenna (34) are arranged outside the detector housing (31); the signal output end of the sensor (36) is connected to the signal receiving end of the detection circuit board (32), the detector wireless module (33) is respectively connected to the communication end of the detection circuit board (32) and the detector antenna (34), and the battery (35) is connected to the power supply end of the detection circuit board (32).

3. The interlocking protection device for preventing the slurry pump from being blocked due to the closure of the gate valve according to claim 2 is characterized in that: A protective wire (5) is arranged on the top of the gate valve (4), and the protective wire (5) is sleeved on the outside of a gate valve stem (41) located at the top of the gate valve (4). The top of the protective wire (5) is higher than the gate valve stem (41) and a through hole is opened on the top of the protective wire (5), and the end of the sensor (36) passes through and is installed in the through hole.

4. The interlocking protection device for preventing the slurry pump from being blocked due to the closure of the gate valve according to claim 3 is characterized in that: The sensor (36) is a proximity sensor, a distance sensor or a magnetic sensor.

5. The interlocking protection device for preventing the slurry pump from being blocked due to the closure of the gate valve according to claim 1 is characterized in that: The number of the wireless detectors (3) is one or more.

6. The interlocking protection device for preventing the slurry pump from being blocked due to the closure of the gate valve according to claim 1 is characterized in that: The actuator (2) is a relay or an electrically controlled gas valve.

7. The interlocking protection device for preventing the slurry pump from being blocked due to the closure of the gate valve according to claim 1 is characterized in that: The host (1) comprises a host housing (11), a main control board (12), a host wireless module (13) and a host antenna (14); the main control board (12) and the host wireless module (13) are arranged inside the housing of the host (1), and the host antenna (14) is arranged outside the housing of the host (11); the actuator (2) is connected to the main control board (12), and the wireless detector (3) is connected to the main control board (12) via the host antenna (14) and the host wireless module (13).

8. The interlocking protection device for preventing the slurry pump from being blocked due to the closure of the gate valve according to claim 7 is characterized in that: The host (1) further comprises a display screen (15) arranged on the host housing (11), and the display screen (15) is connected to the main control board (12).

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