Pipeline explosion-proof control system and mechanical equipment

Abstract

This invention discloses a pipeline explosion-proof control system and mechanical equipment. The pipeline explosion-proof control system includes an explosion-proof device and a controller. The explosion-proof device is installed in the pipeline and includes an electrically controlled valve, an upstream pressure detector, and a downstream pressure detector. The electrically controlled valve controls the opening and closing of the pipeline. The upstream pressure detector is used to detect the upstream pressure of the electrically controlled valve, and the downstream pressure detector is used to detect the downstream pressure of the electrically controlled valve. The controller is configured to control the oil pump to stop working when the upstream pipeline bursts based on the pressure detection value, and to control the electrically controlled valve to cut off the pipeline and control the oil pump to stop working when the downstream pipeline bursts based on the pressure detection value. Thus, this invention can not only perform explosion-proof detection at sensitive upstream and downstream locations, but also can be linked with the oil pump in the entire equipment to shut down the oil pump in a timely manner, preventing oil from continuously gushing out at the burst location and causing secondary harm to the environment or personnel.

Description

Technical Field

[0001] This invention belongs to the field of pipeline explosion-proof technology, specifically relating to a pipeline explosion-proof control system and mechanical equipment. Background Technology

[0002] In traditional hydraulic systems, explosion-proof pipelines are typically protected by adding explosion-proof valves at sensitive points. However, current explosion-proof valves only protect the pipelines downstream of the valve. There are no protective measures in case of a pipeline rupture upstream of the valve, and they cannot be linked with the equipment system to shut off the oil supply in time, resulting in secondary harm to the environment or personnel. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies, the present invention provides a pipeline explosion-proof control system and mechanical equipment, which aims to solve the technical problem that the explosion-proof valve does not work when the upstream pipeline bursts.

[0004] To achieve the above objectives, the present invention provides a pipeline explosion-proof control system, wherein the pipeline explosion-proof control system includes an explosion-proof device and a controller; the explosion-proof device is disposed in the pipeline and includes an electrically controlled valve, an upstream pressure detector, and a downstream pressure detector; the electrically controlled valve is used to control the on / off state of the pipeline; the upstream pressure detector is disposed upstream of the electrically controlled valve and is used to detect the upstream pressure; the downstream pressure detector is disposed downstream of the electrically controlled valve and is used to detect the downstream pressure; the controller is communicatively connected to the oil pump device, the electrically controlled valve, the upstream pressure detector, and the downstream pressure detector, and is configured as follows:

[0005] It receives pressure detection values ​​from the upstream pressure detector and the downstream pressure detector, respectively.

[0006] If the pressure detection value indicates that an upstream pipeline rupture has occurred, the oil pump device should be stopped.

[0007] If a downstream pipe rupture is detected based on pressure readings, the electronically controlled valve will shut off the pipeline and the oil pump will stop operating.

[0008] In this embodiment of the invention, when it is determined from a pressure detection value that an upstream pipe rupture has occurred, controlling the oil pump device to stop working includes:

[0009] If the pressure detected by the upstream pressure detector is lower than the preset upstream pressure, it is determined that an upstream pipe burst has occurred.

[0010] The control pump stops working and issues an alarm indicating the location of the burst pipe.

[0011] In this embodiment of the invention, when it is determined from the pressure detection value that a downstream pipe rupture has occurred, controlling the electronically controlled valve to cut off the pipeline and controlling the oil pump device to stop working includes:

[0012] If the pressure difference between upstream and downstream, calculated based on the pressure detection values ​​of the upstream and downstream pressure detectors, is greater than the preset pressure difference, it is determined that a downstream pipe rupture has occurred.

[0013] The system controls the electronic valve to cut off the pipeline and stops the oil pump, and issues an alarm indicating the location of the burst pipe.

[0014] In this embodiment of the invention, there are two explosion-proof devices, which are respectively installed in the oil inlet and oil return lines of the hydraulic power output device. The controller is further configured as follows:

[0015] It receives pressure detection values ​​sent by the upstream and downstream pressure detectors of the two explosion-proof devices, respectively.

[0016] If the pressure detection value indicates that an upstream pipe rupture has occurred in the oil inlet line, the oil pumping device will be stopped.

[0017] If a downstream pipe rupture is detected in the oil inlet pipeline based on the pressure detection value, the electronic control valve is used to cut off the oil inlet pipeline and the oil pumping device is stopped from working.

[0018] If the pressure detection value indicates that an upstream pipe rupture has occurred in the return oil pipeline, the oil pumping device should be stopped.

[0019] If a downstream pipe rupture is detected in the return oil pipeline based on the pressure detection value, the electronic control valve will be used to cut off the return oil pipeline and the oil pumping device will be stopped.

[0020] In this embodiment of the invention, when it is determined from the pressure detection value that an upstream pipe rupture has occurred in the oil inlet pipeline, controlling the oil pump device to stop working includes:

[0021] If the pressure detected by the upstream pressure detector on the oil inlet pipeline is less than the upstream preset pressure, it is determined that an upstream pipe rupture has occurred in the oil inlet pipeline.

[0022] The control pump stops working and issues an alarm indicating the location of the burst pipe.

[0023] In this embodiment of the invention, when it is determined from the pressure detection value that a downstream pipe rupture has occurred in the oil inlet pipeline, controlling the electronically controlled valve to cut off the oil inlet pipeline and controlling the oil pump device to stop working includes:

[0024] If the pressure difference between upstream and downstream, calculated based on the pressure detection values ​​of the upstream and downstream pressure detectors located on the oil inlet pipeline, is greater than the preset pressure difference, it is determined that a downstream pipe rupture has occurred in the oil inlet pipeline.

[0025] The electronically controlled valve on the oil inlet line cuts off the oil inlet line and stops the oil pump, and issues an alarm indicating the location of the burst pipe.

[0026] In this embodiment of the invention, when it is determined from the pressure detection value that an upstream pipe rupture has occurred in the return oil pipeline, controlling the oil pump device to stop working includes:

[0027] If the pressure readings of all pressure detectors on the inlet pipeline are greater than the corresponding preset pressure, and the pressure readings of all pressure detectors on the return pipeline are less than the corresponding preset pressure, it is determined that an upstream pipe rupture has occurred in the return pipeline.

[0028] The control pump stops working and issues an alarm indicating the location of the burst pipe.

[0029] In this embodiment of the invention, when it is determined from the pressure detection value that a downstream pipe rupture has occurred in the return oil pipeline, controlling the electronically controlled valve to cut off the return oil pipeline and controlling the oil pump device to stop working includes:

[0030] If the pressure difference between upstream and downstream, calculated based on the pressure detection values ​​of the upstream and downstream pressure detectors located on the return oil pipeline, is greater than the preset pressure difference, it is determined that a downstream pipe rupture has occurred in the return oil pipeline.

[0031] The electronically controlled valve on the return oil line cuts off the return oil line and stops the oil pump, and issues an alarm indicating the location of the burst pipe.

[0032] In this embodiment of the invention, the electrically controlled valves in both explosion-proof devices are configured as electrically controlled directional valves, and the controller is further configured as follows:

[0033] Determine the forward and reverse rotation of the hydraulic power output device;

[0034] Determine the inlet and outlet oil lines of the hydraulic power output device based on the forward and reverse rotation conditions.

[0035] To achieve the above objectives, the present invention also provides a mechanical device, wherein the mechanical device includes the pipeline explosion-proof control system described above.

[0036] Through the above technical solutions, the pipeline explosion-proof control system provided by the embodiments of the present invention has the following beneficial effects:

[0037] When the aforementioned pipeline explosion-proof control system is used in a pipeline, it includes an explosion-proof device and a controller. The explosion-proof device includes an electrically controlled valve, an upstream pressure detector located upstream of the electrically controlled valve, and a downstream pressure detector located downstream of the electrically controlled valve. The upstream pressure detector can detect the pressure in the pipeline upstream of the electrically controlled valve, and the downstream pressure detector can detect the pressure in the pipeline downstream of the electrically controlled valve. The controller receives the pressure detection values ​​sent by the upstream and downstream pressure detectors, and can determine whether the pipe rupture location is upstream or downstream of the electrically controlled valve based on the pressure detection values. When the determination is made that the pipe rupture location is upstream of the electrically controlled valve, i.e., the pipeline is upstream... In the event of a pipe burst, the controller stops the oil pump. When the burst location is determined to be downstream of the solenoid valve, i.e., the pipeline is in a downstream burst condition, the controller controls the solenoid valve to cut off the pipeline and stops the oil pump. Thus, the pipeline explosion-proof control system provided by this invention can not only perform explosion-proof detection on the upstream and downstream of sensitive areas, but also link with the oil pump in the entire equipment to shut down the oil pump in time, preventing oil from continuously gushing out at the burst location and causing secondary damage to the environment or personnel. In addition, controlling the solenoid valve to cut off the pipeline when a downstream burst is determined can further prevent oil in the upstream pipeline from continuously flowing to the downstream of the burst.

[0038] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0039] The accompanying drawings are provided to illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0040] Figure 1 This is a schematic diagram of the structure of a pipeline explosion-proof control system according to an embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of the hydraulic pipeline driving the dust suppression vehicle fan in Embodiment 1 of the present invention;

[0042] Figure 3 This is a schematic diagram of the hydraulic pipeline of the mixer truck according to Embodiment 2 of the present invention;

[0043] Figure 4 This is a control flowchart of the controller according to an embodiment of the present invention;

[0044] Figure 5 This is a schematic diagram of the structure of setting explosion-proof devices at different oil circuit locations according to Embodiment 3 of the present invention.

[0045] Explanation of reference numerals in the attached figures

[0046] 100 Explosion-proof device 101 Electrically controlled valve

[0047] 102 Upstream pressure detector 103 Downstream pressure detector

[0048] 200 Controller 300 Oil Pump Unit

[0049] 400 hydraulic power take-off unit; 500 oil tank Detailed Implementation

[0050] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0051] The pipeline explosion-proof control system and mechanical equipment of the present invention are described below with reference to the accompanying drawings.

[0052] like Figure 1 , Figure 2 and Figure 4 As shown, the present invention provides a pipeline explosion-proof control system, wherein the pipeline explosion-proof control system includes:

[0053] An explosion-proof device 100 is installed in a pipeline and includes an electrically controlled valve 101, an upstream pressure detector 102, and a downstream pressure detector 103. The electrically controlled valve 101 is used to control the opening and closing of the pipeline. The upstream pressure detector 102 is located upstream of the electrically controlled valve 101 and is used to detect the upstream pressure of the electrically controlled valve 101. The downstream pressure detector 103 is located downstream of the electrically controlled valve 101 and is used to detect the downstream pressure of the electrically controlled valve 101.

[0054] The controller 200 is communicatively connected to the oil pump unit 300, the solenoid valve 101, the upstream pressure detector 102, and the downstream pressure detector 103, and is configured as follows:

[0055] Step S100: Receive pressure detection values ​​sent by upstream pressure detector 102 and downstream pressure detector 103 respectively;

[0056] Step S110: If it is determined from the pressure detection value that an upstream pipe burst has occurred, control the oil pump device 300 to stop working;

[0057] In step S120, if it is determined that a downstream pipe rupture has occurred based on the pressure detection value, the solenoid valve 101 is controlled to cut off the pipeline and the oil pump device 300 is controlled to stop working.

[0058] When the aforementioned pipeline explosion-proof control system is used in the pipeline, it includes an explosion-proof device 100 and a controller 200. The explosion-proof device 100 includes an electrically controlled valve 101, an upstream pressure detector 102 located upstream of the electrically controlled valve 101, and a downstream pressure detector 103 located downstream of the electrically controlled valve 101. The upstream pressure detector 102 can detect the pressure in the pipeline upstream of the electrically controlled valve 101, and the downstream pressure detector 103 can detect the pressure in the pipeline downstream of the electrically controlled valve 101. The controller 200 receives the pressure detection values ​​sent by the upstream pressure detector 102 and the downstream pressure detector 103, and can determine whether the pipe burst location is upstream or downstream of the electrically controlled valve 101 based on the pressure detection values. When the burst location is determined to be upstream or downstream of the electrically controlled valve 101, the controller 200 determines the location of the burst pipe. Upstream of 101, i.e., in the case of an upstream pipe burst, controller 200 controls the oil pumping device 300 to stop working; when it is determined that the burst location is downstream of the solenoid valve 101, i.e., in the case of a downstream pipe burst, controller 200 controls the solenoid valve 101 to cut off the pipeline and controls the oil pumping device 300 to stop working. Thus, the pipeline explosion-proof control system provided by this invention can not only perform explosion-proof detection on the upstream and downstream of sensitive locations, but also link with the oil pumping device 300 in the entire equipment to shut down the oil pumping device 300 in a timely manner, avoiding the continuous flow of oil at the burst location and causing secondary damage to the environment or personnel. In addition, controlling the solenoid valve 101 to cut off the pipeline when a downstream pipe burst is determined can further prevent the oil in the upstream pipeline from continuously flowing to the downstream of the burst pipe.

[0059] It should be noted that the upstream and downstream of the solenoid valve 101 are defined relative to the flow direction of the oil in the pipeline. The upstream of the solenoid valve 101 refers to the pipeline connected to the oil inlet of the solenoid valve 101, and the downstream of the solenoid valve 101 refers to the pipeline connected to the oil outlet of the solenoid valve 101.

[0060] In this embodiment of the invention, step S110, controlling the oil pump device 300 to stop working when it is determined from the pressure detection value that an upstream pipe rupture has occurred, includes:

[0061] If the pressure detected by the upstream pressure detector 102 is less than the upstream preset pressure, it is determined that an upstream pipe burst has occurred.

[0062] The control pump 300 stops working and issues an alarm indicating the location of the burst pipe.

[0063] Specifically, the controller 200 has pre-stored upstream preset pressure paz and downstream preset pressure pbz. The upstream preset pressure paz and downstream preset pressure pbz can be set according to the flow rate and pressure of the hydraulic pipeline being measured. When the hydraulic system is working normally, the pressure detection value detected by the upstream pressure detector 102 is greater than the upstream preset pressure paz, and the pressure detection value detected by the downstream pressure detector 103 is greater than the downstream preset pressure pbz.

[0064] Furthermore, after receiving the pressure detection values ​​sent by the upstream pressure detector 102 and the downstream pressure detector 103 respectively, the controller 200 can compare the pressure detection value sent by the upstream pressure detector 102 with the upstream preset pressure paz. If the pressure detection value sent by the upstream pressure detector 102 is less than the upstream preset pressure paz, it proves that there is not enough oil flowing downstream from the upstream of the electronic control valve 101, thus determining that the pipeline has burst upstream. At this time, the pumping device 300 can be controlled to stop working to cut off the oil source, and a burst position alarm can be issued to prompt the operator to carry out maintenance in time. Furthermore, after determining that the pipeline has burst, the burst position information can be sent first to issue an alarm, and then corresponding control can be performed. However, in this invention, there is no hard and fast rule on the relevant order. The alarm can be issued by a display screen, an alarm indicator light, or a buzzer.

[0065] In this embodiment of the invention, step S120, in the case that a downstream pipe rupture is determined based on the pressure detection value, controlling the electronically controlled valve 101 to cut off the pipeline and controlling the oil pump device 300 to stop working includes:

[0066] If the pressure difference between upstream and downstream calculated based on the pressure detection values ​​of upstream pressure detector 102 and downstream pressure detector 103 is greater than the preset pressure difference, it is determined that a downstream pipe burst has occurred.

[0067] The control valve 101 cuts off the pipeline and the control pump 300 stops working, and issues an alarm indicating the location of the burst pipe.

[0068] Specifically, the controller 200 has a preset pressure difference Δpz stored in advance. The preset pressure difference Δpz can be set according to the flow rate and pressure of the hydraulic pipeline being measured. When the hydraulic system is working normally, the upstream and downstream pressure difference obtained by subtracting the pressure detection value of the downstream pressure detector 103 from the pressure detection value of the upstream pressure detector 102 is less than the preset pressure difference Δpz.

[0069] Furthermore, after receiving the pressure detection values ​​sent by the upstream pressure detector 102 and the downstream pressure detector 103 respectively, the controller 200 can first subtract the pressure detection value of the downstream pressure detector 103 from the pressure detection value of the upstream pressure detector 102 to calculate the upstream and downstream pressure difference value. Then, the upstream and downstream pressure difference value is compared with the preset pressure difference Δpz. If the upstream and downstream pressure difference value is greater than the preset pressure difference Δpz, it proves that the downstream pressure of the solenoid valve 101 has decreased, thus determining that a downstream pipe burst has occurred. At this time, the solenoid valve 101 can be controlled to cut off the pipeline to prevent oil in the upstream pipeline from flowing to the downstream of the burst pipe, and the oil pump device 300 can be controlled to stop working to cut off the oil source. An alarm prompt for the burst pipe location is also issued to remind the operators to carry out maintenance in a timely manner.

[0070] Of course, the present invention is not limited to this. The downstream pipe burst condition can also be set to directly compare the pressure detection value of the upstream pressure detector 102 with the upstream preset pressure paz, and the pressure detection value of the downstream pressure detector 103 with the downstream preset pressure pbz. Specifically, the upstream preset pressure paz and the downstream preset pressure pbz are not limited to a single value, but can be a range of pressure values ​​obtained through experiments. For example, the upstream preset pressure paz can include the upstream preset pressure range paz1 when an upstream pipe burst occurs, and the upstream preset pressure range paz2 when a downstream pipe burst occurs; the downstream preset pressure pbz can include the downstream preset pressure range pbz1 when an upstream pipe burst occurs, and the downstream preset pressure range pbz2 when a downstream pipe burst occurs. In this way, a pipe burst condition table can be established, so that when judging the pipe burst location based on the pressure detection values ​​of the upstream pressure detector 102 and the downstream pressure detector 103, the range of pressure detection values ​​can be determined by looking up the table first, and then the pipe burst location can be determined according to the range of values.

[0071] like Figure 1 and Figure 3 As shown, in this embodiment of the invention, the number of explosion-proof devices 100 in a pipeline explosion-proof control system can be two. The two explosion-proof devices 100 are respectively installed in the oil inlet pipeline and the oil return pipeline of the hydraulic power output device 400. The controller 200 is further configured as follows:

[0072] The pressure detection values ​​sent by the upstream pressure detector 102 and the downstream pressure detector 103 of the two explosion-proof devices 100 are received respectively.

[0073] If the pressure detection value indicates that an upstream pipe rupture has occurred in the oil inlet pipeline, the oil pump device 300 will be stopped.

[0074] If a downstream pipe rupture is detected in the oil inlet pipeline based on the pressure detection value, the control valve 101 is used to cut off the oil inlet pipeline and the oil pump device 300 is controlled to stop working.

[0075] If the pressure detection value indicates that an upstream pipe rupture has occurred in the return oil pipeline, the oil pump unit 300 will be stopped.

[0076] If a downstream pipe rupture is detected in the return oil pipeline based on the pressure detection value, the control valve 101 will cut off the return oil pipeline and the pumping device 300 will stop working.

[0077] Specifically, the hydraulic power output device 400 can be a motor or a hydraulic cylinder. The oil inlet and return lines of the hydraulic power output device 400 need to be determined according to its direction of movement. The oil inlet line of the hydraulic power output device 400 is the high-pressure side, and the oil return line is the low-pressure side. That is, in this embodiment, both the high-pressure side and the low-pressure side of the hydraulic power output device 400 can be equipped with explosion-proof devices 100. Each explosion-proof device 100 can perform explosion-proof detection on the upstream and downstream sides, so that the entire pipeline explosion-proof control system can achieve global explosion-proof of the entire hydraulic pipeline and provide users with accurate pipeline burst location for easy maintenance. It should be noted that the upstream of the oil inlet pipeline refers to the pipeline located on the high-pressure side of the hydraulic power output device 400 and connected to the oil pump device 300 and the explosion-proof device 100; the downstream of the oil inlet pipeline refers to the pipeline located on the high-pressure side of the hydraulic power output device 400 and connected to the explosion-proof device 100 and the hydraulic power output device 400; the upstream of the oil return pipeline refers to the pipeline located on the low-pressure side of the hydraulic power output device 400 and connected to the hydraulic power output device 400 and the explosion-proof device 100; and the downstream of the oil return pipeline refers to the pipeline located on the low-pressure side of the hydraulic power output device 400 and connected to the explosion-proof device 100 and the oil tank 500.

[0078] Of course, the present invention is not limited to this. In a unidirectional hydraulic pipeline, a pipe burst accident usually occurs on the high-pressure side. Therefore, it is also possible to provide an explosion-proof device 100 only on the high-pressure side of the hydraulic power output device 400.

[0079] In this embodiment of the invention, when it is determined from the pressure detection value that an upstream pipe rupture has occurred in the oil inlet pipeline, controlling the oil pump device 300 to stop working includes:

[0080] If the pressure detected by the upstream pressure detector on the oil inlet pipeline is less than the upstream preset pressure, it is determined that an upstream pipe rupture has occurred in the oil inlet pipeline.

[0081] The control pump 300 stops working and issues an alarm indicating the location of the burst pipe.

[0082] Specifically, the upstream preset pressure paz, the downstream preset pressure pbz, and the preset pressure difference △pz are pre-stored in the controller 200. The upstream preset pressure paz, the downstream preset pressure pbz, and the preset pressure difference △pz can be set according to the flow rate and pressure of the measured hydraulic pipeline. When the hydraulic system is working properly, the pressure detection value pa1 detected by the upstream pressure detector 102 located on the oil inlet pipeline and the pressure detection value pa2 detected by the upstream pressure detector 102 located on the oil return pipeline are both greater than the upstream preset pressure paz. The pressure detection value pb1 detected by the downstream pressure detector 103 located on the oil inlet pipeline and the pressure detection value pb2 detected by the downstream pressure detector 103 located on the oil return pipeline are both greater than the downstream preset pressure pbz. The upstream and downstream pressure difference value pa1 - pb1 on the oil inlet pipeline and the upstream and downstream pressure difference value pa2 - pb2 on the oil return pipeline are both less than the preset pressure difference △pz.

[0083] Further, after the controller 200 receives the pressure detection values sent by each pressure detector on the oil inlet pipeline and the oil return pipeline, it can compare pa1 with the upstream preset pressure paz. If pa1 < paz, it proves that there is not enough oil flowing from the upstream of the electromagnetic control valve 101 on the oil inlet pipeline to the downstream and the oil return pipeline, thereby determining that an upstream burst pipe occurs in the oil inlet pipeline. At this time, the oil pumping device 300 can be controlled to stop working to cut off the oil source, and a burst pipe position alarm prompt can be issued to prompt the operator to perform maintenance in a timely manner. Furthermore, when an upstream burst pipe occurs in the oil inlet pipeline, it can also be detected that pa2 < paz, pb1 < pbz, pb2 < pbz, pa1 - pb1 < △pz, and pa2 - pb2 < △pz.

[0084] In the embodiment of the present invention, when it is determined that a downstream burst pipe occurs in the oil inlet pipeline according to the pressure detection value, controlling the electromagnetic control valve 101 to cut off the oil inlet pipeline and controlling the oil pumping device 300 to stop working includes:

[0085] When the upstream and downstream pressure difference value calculated according to the pressure detection values of the upstream pressure detector 102 and the downstream pressure detector 103 on the oil inlet pipeline is greater than the preset pressure difference, it is determined that a downstream burst pipe occurs in the oil inlet pipeline;

[0086] Control the electromagnetic control valve 101 on the oil inlet pipeline to cut off the oil inlet pipeline, control the oil pumping device 300 to stop working, and issue a burst pipe position alarm prompt.

[0087] Further, after the controller 200 receives the pressure detection values sent by the respective pressure detectors on the oil inlet pipeline and the oil return pipeline, it can subtract the pressure detection value pa1 of the upstream pressure detector 102 of the oil inlet pipeline from the pressure detection value pb1 of the downstream pressure detector 103 to calculate the upstream and downstream pressure difference value. Then, it compares the upstream and downstream pressure difference value with the preset pressure difference △pz. If the upstream and downstream pressure difference value is greater than the preset pressure difference, that is, pa1 - pb1 > △pz, it proves that the downstream pressure of the electromagnetic control valve 101 located on the oil inlet pipeline becomes smaller, thereby determining that a downstream burst occurs in the oil inlet pipeline. At this time, it can control the electromagnetic control valve 101 located on the oil inlet pipeline to cut off the oil inlet pipeline to prevent the oil in the upstream pipeline from flowing to the downstream of the burst, and control the oil pumping device 300 to stop working to cut off the oil source, and issue an alarm prompt for the burst position to prompt the operator to perform maintenance and processing in a timely manner. In addition, after the electromagnetic control valve 101 on the oil inlet pipeline cuts off the oil inlet pipeline, pa1 > paz, pa2 < paz, pb1 < pbz, pb2 < pbz, and pa2 - pb2 < △pz.

[0088] In an embodiment of the present invention, when it is determined that an upstream burst occurs in the oil return pipeline according to the pressure detection value, controlling the oil pumping device 300 to stop working includes:

[0089] When the pressure detection values of the respective pressure detectors located on the oil inlet pipeline are all greater than the corresponding preset pressures, and the pressure detection values of the respective pressure detectors located on the oil return pipeline are all less than the corresponding preset pressures, it is determined that an upstream burst occurs in the oil return pipeline;

[0090] Control the oil pumping device 300 to stop working and issue an alarm prompt for the burst position.

[0091] Specifically, if an upstream burst occurs in the oil return pipeline, in a short period of time, the oil in the oil inlet pipeline can still flow, and the hydraulic power output device 400 can still operate. Then, the comparison results of the pressure detection values of the upstream pressure detector 102 and the downstream pressure detector on the oil inlet pipeline with the corresponding preset pressures are not affected, and pa1 > paz and pb1 > pbz are maintained. However, due to the burst in the oil return pipeline, there is not enough oil to build pressure. Then, the comparison results of the pressure detection values of the upstream pressure detector 102 and the downstream pressure detector on the oil return pipeline with the corresponding preset pressures are affected and become pa2 < paz and pb2 < pbz. Then, when it is detected that pa1 > paz, pb1 > pbz, pa2 < paz, and pb2 < pbz, it can be determined that an upstream burst occurs in the oil return pipeline.

[0092] In an embodiment of the present invention, after it is determined that an upstream burst occurs in the oil return pipeline, it further includes:

[0093] Control the electromagnetic control valve 101 on the oil inlet pipeline to cut off the oil inlet pipeline.

[0094] Furthermore, after determining through comparison that an upstream pipe burst has occurred in the return oil pipeline, in addition to controlling the oil pumping device 300 to stop working, the electronically controlled valve 101 on the inlet oil pipeline can also be controlled to cut off the inlet oil pipeline, so as to prevent oil in the inlet oil pipeline from rushing to the burst return oil pipeline and reduce harm to the environment or personnel.

[0095] In this embodiment of the invention, when it is determined from the pressure detection value that a downstream pipe rupture has occurred in the return oil pipeline, controlling the solenoid valve 101 to cut off the return oil pipeline and controlling the oil pump device 300 to stop working includes:

[0096] If the upstream and downstream pressure difference calculated based on the pressure detection values ​​of the upstream pressure detector 102 and the downstream pressure detector 103 located on the return oil pipeline is greater than the preset pressure difference, it is determined that a downstream pipe rupture has occurred in the return oil pipeline.

[0097] The electrically controlled valve 101 on the return oil line cuts off the return oil line and controls the oil pump device 300 to stop working, and issues an alarm indicating the location of the burst pipe.

[0098] Specifically, after receiving the pressure detection values ​​sent by the pressure detectors on the inlet and return oil lines respectively, the controller 200 can subtract the pressure detection value pb2 of the downstream pressure detector 103 from the pressure detection value pa2 of the upstream pressure detector 102 in the return oil line to calculate the upstream-downstream pressure difference. Then, the upstream-downstream pressure difference is compared with the preset pressure difference Δpz. If the upstream-downstream pressure difference is greater than the preset pressure difference, i.e., pa2-pb2>Δpz, it proves that the downstream pressure of the solenoid valve 101 on the return oil line has decreased, thus determining that a downstream pipe burst has occurred in the return oil line. At this time, the solenoid valve 101 on the return oil line can be controlled to cut off the return oil line to prevent oil in the upstream line from flowing to the downstream of the burst pipe, and the pumping device 300 can be controlled to stop working to cut off the oil source. An alarm prompt for the burst pipe location is also issued to remind the operators to carry out maintenance in a timely manner.

[0099] In addition, after determining through comparison that a downstream pipe burst has occurred in the return oil pipeline, in addition to controlling the solenoid valve 101 on the return oil pipeline to cut off the return oil pipeline, the solenoid valve 101 on the inlet oil pipeline can also be controlled to cut off the inlet oil pipeline, so as to prevent oil in the inlet oil pipeline from rushing to the burst return oil pipeline.

[0100] In this embodiment of the invention, the electrically controlled valves 101 in both explosion-proof devices 100 are configured as electrically controlled directional valves, and the controller 200 is further configured as follows:

[0101] Determine the forward and reverse rotation of the hydraulic power output device 400;

[0102] The oil inlet and return lines of the hydraulic power output device 400 are determined based on the forward and reverse rotation.

[0103] The pipeline explosion-proof control system provided by this invention is applicable to bidirectional hydraulic pipelines. To ensure the accuracy of explosion-proof control, the inlet and return oil lines can be determined based on the forward and reverse rotation of the hydraulic power output device 400, facilitating corresponding control of the explosion-proof devices 100 on different pipelines. Specifically, when the hydraulic pipeline flows in the forward direction, the hydraulic power output device 400 rotates forward. Under normal operation, the oil in the inlet and return oil lines flows from port A to port B. If a pipe rupture is detected at a certain point and the hydraulic directional valve needs to be controlled to cut off the pipeline, the corresponding hydraulic directional valve can be controlled to switch the oil flow from port B to port A. When the hydraulic pipeline flows in the reverse direction, the hydraulic power output device 400 rotates in reverse, the inlet and return oil lines are interchanged, and under normal operation, the oil flows from port B to port A. If a pipe rupture is detected at a certain point and the hydraulic directional valve needs to be controlled to cut off the pipeline, the corresponding hydraulic directional valve can be controlled to switch the oil flow from port A to port B.

[0104] To achieve the above objectives, the present invention also provides a mechanical device, wherein the mechanical device includes the pipeline explosion-proof control system described above. Since the mechanical device adopts all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0105] Example 1 illustrates the implementation of the invention for explosion-proofing of unidirectional loop upstream and downstream pipelines using a dust suppression vehicle fan-driven hydraulic pipeline as an example. Figure 2 As shown.

[0106] The dust suppression vehicle's fan drive hydraulic system includes a closed variable pump configured as an oil pumping device 300 and a closed hydraulic motor configured as a hydraulic power output device 400. When the closed pump gives the Ia signal, the oil flows out from port A1 and in from port B1. The magnitude of Ia determines the speed of oil flow. When the oil flows from A1 to B1, the motor rotates forward, driving the fan to rotate forward.

[0107] An explosion-proof device 100 is installed on the hydraulic pipeline (i.e., the oil inlet line of the closed hydraulic motor) on the high-pressure side of the dust suppression vehicle. The pressure detection values ​​of the two pressure sensors are monitored and compared with the upstream preset pressure paz (assuming 20 bar) and preset pressure difference Δpz stored in the controller 200.

[0108] When a pipe bursts at point A1-Ax upstream of the explosion-proof device 100 (the upstream pipeline flowing to port Ax of the solenoid valve 101), because there is not enough oil flowing downstream, the pressure detection value pa1 of the upstream pressure sensor 102 is less than 20 bar. At this time, a command is issued to control the closed pump to stop working, cut off the oil supply command Ia, and issue an upstream pipe burst warning to remind the operator to carry out maintenance in time.

[0109] When a pipe rupture occurs downstream of the explosion-proof device 100 (Bx-A2), the load on the Bx port of the solenoid valve 101 decreases, and the outlet pressure pb1 decreases. At this time, the pressure difference between the upstream pressure pa1 and the downstream pressure pb1 increases. When pa1-pb1 exceeds the preset pressure Δpz, the controller 200 issues a command, and the solenoid valve 101 cuts off the oil flow from A to B. This achieves the explosion-proof function of the high-pressure side pipeline of the dust suppression vehicle upstream and downstream of the solenoid valve 101.

[0110] Example 2 illustrates the implementation of the present invention for bidirectional circuit global explosion protection using the hydraulic pipeline of a mixer truck as an example. Figure 3 As shown.

[0111] The hydraulic system of the mixer truck includes a closed variable pump (300) and a closed hydraulic motor (400) as a hydraulic power output device. When the closed pump gives signal Ia, the oil flows out from port A1 of the pump, through port A2 of the motor, drives the motor to rotate forward, and then flows out from port B2 of the motor and back to port B1 of the pump, thus realizing the forward rotation of the motor. When signal Ib is given, the oil flows out from port B1 of the pump, through port B2 of the motor, drives the motor to rotate in reverse, and then flows out from port A2 of the motor and back to port A1 of the pump, thus realizing the reverse rotation of the motor.

[0112] An explosion-proof device 100 is installed on each of the two hydraulic lines A1-A2 and B2-B1. Two pressure sensors in each explosion-proof device 100 detect the upstream and downstream pressures of the corresponding electrically controlled valve 101. The controller stores the upstream preset pressure paz, the downstream preset pressure pbz, and the preset pressure difference Δpz (e.g., paz set to 10 bar, pbz set to 5 bar, Δpz set to 20 bar). During monitoring, the upstream pressure detection value pa1 of the inlet line and the upstream pressure detection value pa2 of the return line are compared with paz; the downstream pressure detection values ​​pb1 and pb2 of the inlet line and the return line are compared with pbz; and the upstream and downstream pressure difference values ​​pa1-pb1 and pa2-pb2 of the inlet and return lines are compared with Δpz. Specifically, when the hydraulic system is working normally, pa1 and pa2 are both greater than paz, pb1 and pb2 are both greater than pbz, and pa1-pb1 and pa2-pb2 are both less than Δpz.

[0113] Furthermore, the hydraulic pipeline burst control of the mixer truck will be described in detail with the motor rotating in the forward direction. At this time, A1-A2 is the oil inlet pipeline of the motor, where A1-Ax is upstream of the explosion-proof device 100 on the oil inlet pipeline, and Bx-A2 is downstream of the explosion-proof device 100 on the oil inlet pipeline; B2-B1 is the oil return pipeline of the motor, where B2-Ay is upstream of the explosion-proof device 100 on the oil return pipeline, and By-B1 is downstream of the explosion-proof device 100 on the oil return pipeline.

[0114] When a pipe bursts in the A1-Ax pipeline, there is not enough oil flowing downstream to A2-B2-B1. The motor stops or its speed decreases, and pa1 < paz can be detected. At this time, an alarm message for the A1-Ax pipeline burst is issued, and the closed pump is controlled to stop working.

[0115] When a pipe bursts at Bx-A2, the pressure at Bx-A2 is almost zero. The pressure detection value on the oil inlet pipe shows that pa1-pb1 > Δpz. The system first issues a pipe burst alarm message for Bx-A2, then sends a cut-off command to the solenoid valve 101 on the oil inlet pipe to cut off the Ax-Bx passage, preventing oil from flowing downstream, and sends a command to the closed pump to shut off the oil source.

[0116] When a pipe bursts at B2-Ay, the oil in the upstream A1-Ax-Bx-A2-B2 pipeline can flow for a short time, and the motor can rotate for a short time, with pa1 > paz, pb1 > pbz, and pa1 - pb1 < Δpz. However, since a pipe bursts at B2-Ay, there is not enough oil pressure in the Ay-By-B1 pipeline, resulting in pa2 < paz and pb2 < pbz. At this time, the system issues a pipe burst alarm at B2-Ay and controls the closed-loop pump to shut off the oil supply.

[0117] When a pipe bursts at By-B1, the pressure at By-B1 is almost zero. The pressure detection value on the return oil line shows that pb2-pa2>△pz. The system first issues a pipe burst alarm message for By-B1, then sends a cut-off command to the solenoid valve 101 on the return oil line to cut off the By-B1 passage, preventing oil from flowing downstream, and sends a command to the closed pump to shut off the oil source.

[0118] Furthermore, when the motor reverses, B1-B2 is the motor's oil inlet line, where B1-By is upstream of the explosion-proof device 100 on the oil inlet line, and Ay-B2 is downstream of the explosion-proof device 100 on the oil inlet line; A2-A1 is the motor's oil return line, where A2-Bx is upstream of the explosion-proof device 100 on the oil return line, and Ax-A1 is downstream of the explosion-proof device 100 on the oil return line. Its control principle is similar to that of forward rotation and will not be elaborated upon here.

[0119] Example 3: The pipeline explosion-proof control system provided by this invention can also be used for monitoring pipeline ruptures at different locations in hydraulic systems, such as... Figure 5As shown, an explosion-proof device 100(a) is installed on the main pressure oil line (P0 to P1 in the figure) between the power element and the control element of the hydraulic system; a first pressure dividing oil line (1A1 to 1A2 in the figure), a first return oil line (1B1 to 1B2 in the figure), a second pressure dividing oil line (1A3 to 1A4 in the figure), and a second return oil line (1B3 to 1B4 in the figure) are provided between the control element and the actuator; an explosion-proof device 100(b) is installed on the first pressure dividing oil line, and an explosion-proof device 100(b) is installed on the first return oil line. 00(c), an explosion-proof device 100(d) is provided on the second pressure oil line, and an explosion-proof device 100(e) is provided on the second return oil line; an explosion-proof device 100(f) is provided on the main return oil line (T1 to T0 in the figure) between the control element and the auxiliary element; an explosion-proof device 100(h) is provided on the motor drain oil line. Of course, explosion-proof devices 100 can also be installed on oil lines at high pressure, hydraulic shock and other locations not shown in the figure. Through the above arrangement, the purpose of pipeline explosion monitoring and explosion prevention for the entire hydraulic system can be achieved.

[0120] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0121] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0122] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0123] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A line explosion control system, characterized by, The pipeline explosion-proof control system comprises: An explosion-proof device (100) arranged in the pipeline and comprising an electrically controlled valve (101), an upstream pressure detector (102) and a downstream pressure detector (103), the electrically controlled valve (101) being used for controlling the opening and closing of the pipeline, the upstream pressure detector (102) being arranged upstream of the electrically controlled valve (101) and being used for detecting the upstream pressure, and the downstream pressure detector (103) being arranged downstream of the electrically controlled valve (101) and being used for detecting the downstream pressure; A controller (200) in communication connection with a pump oil device (300), the electrically controlled valve (101), the upstream pressure detector (102) and the downstream pressure detector (103) respectively and being configured to: receive the pressure detection values sent by the upstream pressure detector (102) and the downstream pressure detector (103) respectively; in the case where it is determined according to the pressure detection values that the pipeline has an upstream pipe explosion, control the pump oil device (300) to stop working so as to cut off the oil source supply, wherein the determination of the upstream pipe explosion is based on the pressure detection value of the upstream pressure detector (102) being less than the upstream preset pressure; in the case where it is determined according to the pressure detection values that the pipeline has a downstream pipe explosion, control the electrically controlled valve (101) to cut off the pipeline and control the pump oil device (300) to stop working so as to block the oil liquid in the upstream pipeline from continuously flowing to the downstream of the pipe explosion, wherein the determination of the downstream pipe explosion is based on the upstream-downstream pressure difference value calculated from the pressure detection values of the upstream pressure detector (102) and the downstream pressure detector (103) being greater than the preset pressure difference.

2. The line explosion control system of claim 1, wherein The control of the pump oil device (300) to stop working in the case where it is determined according to the pressure detection values that the pipeline has an upstream pipe explosion comprises: in the case where the pressure detection value of the upstream pressure detector (102) is less than the upstream preset pressure, determine that the pipeline has an upstream pipe explosion; control the pump oil device (300) to stop working and issue a pipe explosion position alarm prompt.

3. The line explosion control system of claim 1, wherein The control of the electrically controlled valve (101) to cut off the pipeline and the control of the pump oil device (300) to stop working in the case where it is determined according to the pressure detection values that the pipeline has a downstream pipe explosion comprises: in the case where the upstream-downstream pressure difference value calculated from the pressure detection values of the upstream pressure detector (102) and the downstream pressure detector (103) is greater than the preset pressure difference, determine that the pipeline has a downstream pipe explosion; control the electrically controlled valve (101) to cut off the pipeline and control the pump oil device (300) to stop working, and issue a pipe explosion position alarm prompt.

4. The line explosion control system of claim 1, wherein The number of the explosion-proof devices (100) is two, the two explosion-proof devices (100) are arranged in the oil inlet pipeline and the oil return pipeline of the hydraulic power output device (400), and the controller (200) is further configured to: receive the pressure detection values sent by the upstream pressure detectors (102) and the downstream pressure detectors (103) of the two explosion-proof devices (100) respectively; In a case where it is determined according to the pressure detection value that the oil inlet pipeline has an upstream burst, the oil pumping device (300) is controlled to stop working; In a case where it is determined according to the pressure detection value that the oil inlet pipeline has a downstream burst, the electric control valve (101) is controlled to cut off the oil inlet pipeline, and the oil pumping device (300) is controlled to stop working; In a case where it is determined according to the pressure detection value that the oil return pipeline has an upstream burst, the oil pumping device (300) is controlled to stop working; In a case where it is determined according to the pressure detection value that the oil return pipeline has a downstream burst, the electric control valve (101) is controlled to cut off the oil return pipeline, and the oil pumping device (300) is controlled to stop working.

5. The line explosion control system of claim 4, wherein The control of the oil pumping device (300) to stop working in a case where it is determined according to the pressure detection value that the oil inlet pipeline has an upstream burst comprises: In a case where the pressure detection value of an upstream pressure detector (102) located on the oil inlet pipeline is less than an upstream preset pressure, it is determined that the oil inlet pipeline has an upstream burst; The oil pumping device (300) is controlled to stop working, and a burst position alarm prompt is issued.

6. The line explosion control system of claim 4, wherein The control of the electric control valve (101) to cut off the oil inlet pipeline and the control of the oil pumping device (300) to stop working in a case where it is determined according to the pressure detection value that the oil inlet pipeline has a downstream burst comprises: In a case where an upstream-downstream pressure difference value calculated according to the pressure detection values of an upstream pressure detector (102) and a downstream pressure detector (103) located on the oil inlet pipeline is greater than a preset pressure difference, it is determined that the oil inlet pipeline has a downstream burst; The electric control valve (101) on the oil inlet pipeline is controlled to cut off the oil inlet pipeline, and the oil pumping device (300) is controlled to stop working, and a burst position alarm prompt is issued.

7. The line explosion control system of claim 4, wherein The control of the oil pumping device (300) to stop working in a case where it is determined according to the pressure detection value that the oil return pipeline has an upstream burst comprises: In a case where the pressure detection values of all the pressure detectors located on the oil inlet pipeline are all greater than the corresponding preset pressures, and the pressure detection values of all the pressure detectors located on the oil return pipeline are all less than the corresponding preset pressures, it is determined that the oil return pipeline has an upstream burst; The oil pumping device (300) is controlled to stop working, and a burst position alarm prompt is issued.

8. The line explosion control system of claim 4, wherein, The control of the electric control valve (101) to cut off the oil return pipeline and the control of the oil pumping device (300) to stop working in a case where it is determined according to the pressure detection value that the oil return pipeline has a downstream burst comprises: In a case where an upstream-downstream pressure difference value calculated according to the pressure detection values of an upstream pressure detector (102) and a downstream pressure detector (103) located on the oil return pipeline is greater than a preset pressure difference, it is determined that the oil return pipeline has a downstream burst; The electric control valve (101) on the oil return pipeline is controlled to cut off the oil return pipeline, and the oil pumping device (300) is controlled to stop working, and a burst position alarm prompt is issued.

9. A line explosion control system according to any one of claims 4 to 8, wherein The electric control valve (101) in each of the two explosion-proof devices (100) is an electrically controlled reversing valve, and the controller (200) is further configured to: determine the forward and reverse rotation of the hydraulic power output device (400); determine the oil inlet pipeline and the oil return pipeline of the hydraulic power output device (400) according to the forward and reverse rotation.

10. A mechanical device, characterized by The mechanical equipment comprises the pipeline explosion-proof control system according to any one of claims 1 to 9.

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