Oil unloading pump pressure remote transmission on-site alarm interlocking device

Abstract

The utility model discloses an oil unloading pump pressure remote transmission on-site alarm interlocking device which comprises a bottom plate, an oil unloading pump body is installed at the upper end of the bottom plate, a photoelectric converter and a switch are installed at the upper end of the oil unloading pump body, a control cabinet is arranged on one side of the oil unloading pump body, and an alarm is arranged on the other side of the oil unloading pump body. A pressure transmitter is arranged above the oil unloading pump body, the control cabinet is in signal connection with the oil unloading pump body and the pressure transmitter through a threading pipe, and an installation mechanism used for the pressure transmitter is arranged above the oil unloading pump body. When the oil tank high liquid level alarm interlock is triggered, the control cabinet sends out a wharf boat pump stopping signal, meanwhile, the tank field inlet electric valve and the shore emergency cut-off valve are interlocked and closed, and in the process, if the pump stopping signal is not sent to a wharf boat in time due to abnormal transmission, when the pressure in a pipeline reaches an alarm value, the wharf boat is stopped. The pressure transmitter can send out a pump stopping interlocking signal, pump stopping is achieved, and pressure building is prevented.

Description

Technical Field

[0001] This application relates to the technical field of alarm interlock devices, and particularly to a remote transmission and local alarm interlock device for the pressure of an oil unloading pump. Background Art

[0002] In industries such as petroleum and chemical industries, the oil unloading pump is a key device, and the monitoring of its operating status is crucial for ensuring production safety. At present, there are various pressure monitoring systems for oil unloading pumps on the market. The more common one is to convert the pump body pressure into an electrical signal through a pressure transmitter, and then transmit it to a remote monitoring room through a cable for display and recording;

[0003] Regarding the above related technologies, the inventor believes that the installation position of the pressure transmitter is often limited by the pump body structure and pipeline layout, resulting in a cumbersome installation process and the need for a long cable for signal transmission, increasing costs and construction difficulties. When the pressure transmitter needs to be repaired or replaced, it usually requires shutdown operations, affecting production efficiency. And due to the cable fixation, the disassembly process is relatively difficult. At the same time, although the remote monitoring system can achieve pressure monitoring, in case of abnormal situations, due to signal transmission delay, the alarm response may not be timely enough, posing a safety hazard;

[0004] The above information disclosed in this background art is only used to increase the understanding of the background art of this application. Therefore, it may include prior art that is not known to those of ordinary skill in the art. Summary of the Utility Model

[0005] In order to solve the problems that the installation position of the pressure transmitter is often limited by the pump body structure and pipeline layout, resulting in a cumbersome installation process and the need for a long cable for signal transmission, increasing costs and construction difficulties. When the pressure transmitter needs to be repaired or replaced, it usually requires shutdown operations, affecting production efficiency. And due to the cable fixation, the disassembly process is relatively difficult. At the same time, although the remote monitoring system can achieve pressure monitoring, in case of abnormal situations, due to signal transmission delay, the alarm response may not be timely enough, posing a safety hazard, this application provides a remote transmission and local alarm interlock device for the pressure of an oil unloading pump.

[0006] The remote transmission and local alarm interlock device for the pressure of an oil unloading pump provided by this application adopts the following technical solutions:

[0007] A remote transmission and local alarm interlock device for the pressure of an oil unloading pump includes a bottom plate. An oil unloading pump body is installed at the upper end of the bottom plate. An optical - electrical converter and a switch are installed at the upper end of the oil unloading pump body. A control cabinet is arranged on one side of the oil unloading pump body. A pressure transmitter is arranged above the oil unloading pump body. The control cabinet is signal - connected to the oil unloading pump body and the pressure transmitter through a threading pipe. An installation mechanism for the pressure transmitter is arranged above the oil unloading pump body.

[0008] Preferably, the installation mechanism includes a mounting plate fixedly connected to the upper end of the oil unloading pump body. A welding interface base is provided at the upper end of the mounting plate, and a mounting box is fixedly connected to the upper end of the welding interface base.

[0009] Preferably, a sliding cavity is provided inside the mounting box. An electromagnetic plate is installed on the left outer wall of the mounting box. A magnetic sliding plate is slidably connected between the front and rear inner walls of the sliding cavity. The left side of the magnetic sliding plate is slidably connected to the left inner wall of the sliding cavity through a plurality of connecting springs.

[0010] Preferably, after the electromagnetic plate is energized, the adjacent surfaces of the electromagnetic plate and the magnetic sliding plate attract each other with opposite polarities. A plurality of limiting blocks are fixedly connected to the right side of the magnetic sliding plate. A socket is provided inside the mounting box, and a connecting plate is slidably connected between the front and rear inner walls of the socket.

[0011] Preferably, the right side of the connecting plate is fixedly connected to the left side of the pressure transmitter. A plurality of limiting grooves adapted to the limiting blocks are formed on the left outer wall of the connecting plate.

[0012] Preferably, an analog quantity acquisition module is installed inside the control cabinet. Cables and auxiliary materials are provided as a set between the oil unloading pump body and the control cabinet.

[0013] In summary, the present application includes the following beneficial technical effects:

[0014] 1. During the oil unloading process, when the high-high liquid level alarm interlock of the oil tank is triggered, the control cabinet sends a signal to stop the pump on the barge. At the same time, the electric valve at the inlet of the tank farm and the emergency cut-off valve on the shore are interlocked and closed. During this process, if the stop pump signal fails to be sent to the barge in time due to abnormal transmission, when the pressure in the pipeline reaches the alarm value, the pressure transmitter will send a stop pump interlock signal to stop the pump, preventing pressure buildup, and thus realizing the double insurance of remote and local interlock on the barge. If the electric valve in the tank farm or the emergency cut-off valve on the shore malfunctions and suddenly closes, the pressure in the pipeline will increase sharply. When the pressure reaches the pressure alarm set value, the pressure transmitter sends an interlock signal to stop the oil unloading pump, preventing the pipeline from being pressured up.

[0015] 2. The electromagnetic plate will give the magnetic sliding plate an attractive force to the left, causing the magnetic sliding plate to move leftward and compress the connecting springs. After the magnetic sliding plate moves leftward, a plurality of limiting blocks will leave a plurality of limiting grooves. At this time, the staff can easily pick up the pressure transmitter to complete the disassembly. When installing, the electromagnetic plate is also energized for a period of time. When the magnetic sliding plate and the limiting blocks move leftward, the connecting plate is inserted into the socket, and then the electromagnetic plate is powered off. At this time, the magnetic sliding plate and the plurality of limiting blocks will be inserted into the plurality of limiting grooves under the elastic action of the connecting springs, realizing rapid installation and disassembly. Description of the Drawings

[0016] Figure 1It is a schematic diagram of the overall structure of the application embodiment;

[0017] Figure 2 It is a schematic diagram of the internal structure of the application embodiment;

[0018] Figure 3 It is of the application embodiment Figure 2 Enlarged view at position A of;

[0019] Figure 4 It is the wiring diagram of the oil unloading pump body circuit of the application embodiment.

[0020] Explanation of reference numerals: 1, bottom plate; 2, oil unloading pump body; 3, threading pipe; 4, control cabinet; 5, mounting plate; 6, welding interface base; 7, mounting box; 8, pressure transmitter; 9, connecting plate; 10, electromagnetic plate; 11, connecting spring; 12, sliding cavity; 13, magnetic sliding plate; 14, limiting block; 15, socket; 16, limiting groove. Specific implementation manners

[0021] The following further describes the present application in detail with reference to the attached Figures 1-4 drawings.

[0022] The embodiment of the present application discloses an oil unloading pump pressure remote transmission local alarm interlock device. Referring to Figures 1-4 , an oil unloading pump pressure remote transmission local alarm interlock device includes a bottom plate 1, an oil unloading pump body 2 is installed at the upper end of the bottom plate 1, an optical-electric converter and a switch are installed at the upper end of the oil unloading pump body 2, a control cabinet 4 is arranged on one side of the oil unloading pump body 2, a pressure transmitter 8 is arranged above the oil unloading pump body 2, the pressure transmitter 8 is an electronic transmitter, and the pressure value is more accurate. By comparing with the original pointer pressure gauge, even if one of the pressure devices suddenly fails, the employees also have a reference direction, which is convenient for the employees on the barge to view the real-time pressure value change. The pressure numbers have backlight and can be clearly seen from a distance. The control cabinet 4 is signal-connected to the oil unloading pump body 2 and the pressure transmitter 8 through a threading pipe 3, and an installation mechanism for the pressure transmitter 8 is arranged above the oil unloading pump body 2;

[0023] Referring to Figures 2-3 , the installation mechanism includes a mounting plate 5 fixedly connected to the upper end of the oil unloading pump body 2, a welding interface base 6 is arranged at the upper end of the mounting plate 5, an installation box 7 is fixedly connected to the upper end of the welding interface base 6, a sliding cavity 12 is arranged in the installation box 7, an electromagnetic plate 10 is installed on the left outer wall of the installation box 7, a magnetic sliding plate 13 is slidably connected between the front and rear inner walls of the sliding cavity 12, the left side of the magnetic sliding plate 13 is slidably connected to the left inner wall of the sliding cavity 12 through a plurality of connecting springs 11, the electromagnetic plate 10 is attracted to the adjacent surface of the magnetic sliding plate 13 with opposite polarity after being energized, a plurality of limiting blocks 14 are fixedly connected to the right side of the magnetic sliding plate 13, a socket 15 is arranged in the installation box 7, and a connecting plate 9 is slidably connected between the front and rear inner walls of the socket 15.

[0024] The electromagnetic plate 10 will apply an attractive force to the left on the magnetic slide plate 13, causing the magnetic slide plate 13 to move leftward and compress the connecting spring 11. After the magnetic slide plate 13 moves leftward, multiple limit blocks 14 will leave multiple limit slots 16. At this time, the staff can pick up the pressure transmitter 8 more conveniently to complete the disassembly. During installation, the electromagnetic plate 10 is also energized for a period of time. When the magnetic slide plate 13 and the limit blocks 14 move leftward, the connecting plate 9 is inserted into the socket 15. Subsequently, the electromagnetic plate 10 is powered off. At this time, the magnetic slide plate 13 and multiple limit blocks 14 will be inserted into multiple limit slots 16 under the elastic action of the connecting spring 11, realizing rapid installation and disassembly.

[0025] Refer to Figures 1-4 , the right side of the connecting plate 9 is fixedly connected to the left side of the pressure transmitter 8. Multiple limit slots 16 that cooperate with the limit blocks 14 are provided on the outer wall of the left side of the connecting plate 9. An analog quantity acquisition module is installed in the control cabinet 4. A cable and auxiliary materials are provided between the oil unloading pump body 2 and the control cabinet 4. The pressure switch signal is input into the analog quantity module and transmitted through the optical fiber used by the previous equipment. The barge pressure signal is transmitted to the control cabinet in the oil depot machine room, and then the communication signal is transmitted to the SCADA system interface in the central control room for real-time display;

[0026] By adding a control cabinet 4 in the barge pump room, a 2-core 24V power supply is connected to the equipment, a 2-core normally closed output signal is connected to the soft start protector of the oil unloading pump (to control the pump interlock), and a 2-core analog quantity signal (remote transmission signal) is connected. The high alarm value of the pressure transmitter 8 is set. When the pressure exceeds the alarm value, the pressure transmitter 8 emits an audible and visual alarm and sends a signal to the oil unloading pump body 2 to realize the local interlock pump stop function.

[0027] The implementation principle of the oil unloading pump pressure remote transmission local alarm interlock device in the embodiment of the present application is as follows: During the oil unloading process, when the high-high liquid level alarm interlock of the oil tank is triggered, the control cabinet sends a barge pump stop signal, and at the same time, the inlet electric valve in the tank area and the shore emergency cut-off valve are interlocked and closed. During this process, if the pump stop signal fails to be sent to the barge in time due to abnormal transmission, when the pressure in the pipeline reaches the alarm value, the pressure transmitter will send a pump stop interlock signal to stop the pump, preventing pressure buildup, and thus realizing the dual insurance of remote and local interlock of the barge. If the tank area electric valve or the shore emergency cut-off valve malfunctions and suddenly closes, the pressure in the pipeline will increase sharply. When it reaches the pressure alarm setting value, the pressure transmitter sends an interlock signal to stop the oil unloading pump to prevent pipeline pressure buildup;

[0028] When it is necessary to install or disassemble the pressure transmitter 8, the electromagnetic plate 10 is energized for a period of time. Eventually, during this energized period, the electromagnetic plate 10 will give a leftward attraction force to the magnetic slide plate 13, causing the magnetic slide plate 13 to move leftward and compress the connecting spring 11. After the magnetic slide plate 13 moves leftward, multiple limit blocks 14 will leave multiple limit slots 16. At this time, the staff can easily pick up the pressure transmitter 8 to complete the disassembly. When installing, the electromagnetic plate 10 is also energized for a period of time. After the magnetic slide plate 13 and the limit blocks 14 move leftward, the connecting plate 9 is inserted into the socket 15. Subsequently, the electromagnetic plate 10 is powered off. At this time, the magnetic slide plate 13 and multiple limit blocks 14 will be inserted into multiple limit slots 16 under the elastic action of the connecting spring 11, realizing rapid installation and disassembly.

[0029] Finally, several points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. It can be a mechanical connection or an electrical connection, or it can be the communication inside two components. It can be directly connected. "Up", "down", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change;

[0030] Second: In the attached drawings of the disclosed embodiments of the present utility model, only the structures related to the disclosed embodiments are involved. For other structures, reference can be made to the usual designs. Without conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0031] Finally: The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

[0032] The above are all the preferred embodiments of this application and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. An oil unloading pump pressure remote transmission local alarm interlock device, comprising a base plate (1), characterized in that: An oil unloading pump body (2) is installed at the upper end of the base plate (1), a photoelectric converter and a switch are installed at the upper end of the oil unloading pump body (2), a control cabinet (4) is arranged on one side of the oil unloading pump body (2), a pressure transmitter (8) is arranged above the oil unloading pump body (2), the control cabinet (4) is connected to the oil unloading pump body (2) and the pressure transmitter (8) through a threading pipe (3), and a mounting mechanism for the pressure transmitter (8) is arranged above the oil unloading pump body (2).

2. According to claim 1, the oil unloading pump pressure remote transmission local alarm interlock device is characterized by: The mounting mechanism comprises a mounting plate (5) fixedly connected to the upper end of the oil unloading pump body (2); a welding interface base (6) is provided at the upper end of the mounting plate (5); and a mounting box (7) is fixedly connected to the upper end of the welding interface base (6).

3. The oil unloading pump pressure remote transmission local alarm interlock device according to claim 2 is characterized by: A sliding cavity (12) is provided in the installation box (7), an electromagnetic plate (10) is installed on the left outer wall of the installation box (7), a magnetic slide plate (13) is slidably connected between the front and rear inner walls of the sliding cavity (12), and the left side of the magnetic slide plate (13) is slidably connected to the left inner wall of the sliding cavity (12) via a plurality of connection springs (11).

4. The oil unloading pump pressure remote transmission local alarm interlock device according to claim 3 is characterized by: When the electromagnetic plate (10) is energized, it attracts the adjacent surface of the magnetic slide plate (13) anisotropically; a plurality of limit blocks (14) are fixedly connected to the right side of the magnetic slide plate (13); a socket (15) is provided in the installation box (7); and a connecting plate (9) is slidably connected between the front and rear inner walls of the socket (15).

5. The oil unloading pump pressure remote transmission local alarm interlock device according to claim 4 is characterized in that: The right side of the connecting plate (9) is fixedly connected to the left side of the pressure transmitter (8), and a plurality of limiting grooves (16) matching with the limiting blocks (14) are provided on the left outer wall of the connecting plate (9).

6. The oil unloading pump pressure remote transmission local alarm interlock device according to claim 5 is characterized by: An analog quantity acquisition module is installed in the control cabinet (4), and cables and auxiliary materials are provided between the oil unloading pump body (2) and the control cabinet (4).

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