阅读说明：本技术 紧停安全保护系统和混凝土泵车 (Emergency stop safety protection system and concrete pump truck ) 是由 易炳长 黄运明 邓良驹 于 2021-08-17 设计创作，主要内容包括：本发明提供一种紧停安全保护系统和混凝土泵车,其中系统包括：作业紧停控制器和多个紧停按钮；多个所述紧停按钮沿着混凝土泵车的车身周围布置；每一紧停按钮包括第一常闭触点；多个所述紧停按钮的第一常闭触点串联后,与所述作业紧停控制器的电压检测端连接；所述作业紧停控制器,分别与所述混凝土泵车中的各个作业控制模块连接,用于当电压检测端检测到电压失去信号时,向各个作业控制模块发出紧急停止指令。本发明提供的紧停安全保护系统和混凝土泵车,可靠性高,提高了混凝土泵车的安全性。(The invention provides an emergency stop safety protection system and a concrete pump truck, wherein the system comprises: a work emergency stop controller and a plurality of emergency stop buttons; the emergency stop buttons are arranged along the periphery of the body of the concrete pump truck; each emergency stop button comprises a first normally closed contact; after the first normally closed contacts of the emergency stop buttons are connected in series, the emergency stop buttons are connected with a voltage detection end of the operation emergency stop controller; and the operation tight stop controller is respectively connected with each operation control module in the concrete pump truck and is used for sending an emergency stop instruction to each operation control module when the voltage detection end detects that the voltage loses a signal. The emergency stop safety protection system and the concrete pump truck provided by the invention have high reliability, and the safety of the concrete pump truck is improved.)

1. An emergency stop safety protection system, comprising a work emergency stop controller and a plurality of emergency stop buttons; the emergency stop buttons are arranged along the periphery of the body of the concrete pump truck; each emergency stop button comprises a first normally closed contact;

after the first normally closed contacts of the emergency stop buttons are connected in series, the emergency stop buttons are connected with a voltage detection end of the operation emergency stop controller;

and the operation tight stop controller is respectively connected with each operation control module in the concrete pump truck and is used for sending an emergency stop instruction to each operation control module when the voltage detection end detects that the voltage loses a signal.

2. The emergency stop safety protection system of claim 1, wherein each of the emergency stop buttons comprises a second normally closed contact;

after the second normally closed contacts of the emergency stop buttons are connected in series, the second normally closed contacts are connected with the frequency detection end of the operation emergency stop controller;

and the operation emergency stop controller is connected with the alarm module in the concrete pump truck and is used for sending an emergency stop button state abnormity alarm signal to the alarm module when the frequency detection end detects a frequency abnormity signal.

3. The emergency stop safety protection system of claim 2, wherein the plurality of emergency stop buttons comprises a first emergency stop button, a second emergency stop button, a third emergency stop button, a fourth emergency stop button, and a fifth emergency stop button;

the first emergency stop button is arranged on the tail operation box, the second emergency stop button is arranged on the left leg operation box of the automobile body, the third emergency stop button is arranged on the right leg operation box of the automobile body, the fourth emergency stop button is arranged on the electric control cabinet, and the fifth emergency stop button is arranged on the maintenance operation box.

4. The emergency shutdown security protection system of claim 3, further comprising a remote emergency shutdown button; the remote control emergency stop button is arranged on a remote controller of the concrete pump truck;

and the operation emergency stop controller is connected with the remote controller and is used for sending an emergency stop instruction to each operation control module when receiving the working signal of the remote control emergency stop button.

5. The emergency shutdown security protection system of claim 4, further comprising a first reset confirmation button;

the first reset confirmation button is arranged on the remote controller;

and the operation close stop controller is used for resetting based on the received first reset confirmation button working signal.

6. The emergency shutdown security protection system of claim 5, further comprising a second reset confirmation button;

the second reset confirmation button is arranged on the tailstock operation box;

and the operation close stop controller is connected with the second reset confirmation button and is used for resetting based on the received working signal of the second reset confirmation button.

7. The emergency shutdown safety protection system of any one of claims 1 to 6, further comprising a screen emergency shutdown controller and a screen on-off detection device;

the screen opening and closing detection device is used for detecting the opening and closing of the screen and sending a tightly-stopping signal;

the screen tight-stop controller is respectively connected with a stirring control module, a tilt cylinder control module, a pumping control module and an alarm module in the concrete pump truck, and is used for sending an emergency stop instruction to the stirring control module, the tilt cylinder control module and the pumping control module and sending a screen failure alarm signal to the alarm module when detecting that the screen open-close detection device sends a screen tight-stop signal.

8. The emergency shutdown safety protection system of claim 7, wherein the first normally closed contact of the screen opening and closing detection device is connected to the first voltage detection end of the screen emergency shutdown controller; a second normally closed contact of the screen opening and closing detection device is connected with a second voltage detection end of the screen tight stop controller;

and the screen tight stop controller is used for determining that a screen tight stop signal sent by the screen opening and closing detection device is detected when the first voltage detection end and the second voltage detection end simultaneously detect that the voltage loses the signal.

9. The emergency shutdown safety protection system of claim 8, further comprising a screen reset confirmation button;

the screen mesh resetting confirmation button is arranged on the tail operation box;

and the screen tight stop controller is connected with the screen reset confirmation button and is used for resetting based on the received working signal of the screen reset confirmation button.

10. The emergency shutdown safety protection system of claim 7, wherein the service emergency shutdown controller and the screen emergency shutdown controller each employ a safety relay.

11. A concrete pump truck characterized by comprising the emergency stop safety protection system according to any one of claims 1 to 10.

Technical Field

The invention relates to the technical field of mechanical engineering, in particular to an emergency stop safety protection system and a concrete pump truck.

Background

Concrete pump trucks are a kind of working machine, and have certain dangerousness in the construction process, especially when the operation is mishaped, the concrete pump trucks are likely to tip over or other accidents, thereby causing casualties and property loss. With the increasing attention of users to the operation safety, how to improve the safety of the concrete pump truck also becomes a technical problem to be solved.

The emergency stop safety protection system is a basic guarantee for ensuring the operation safety of the concrete pump truck, and when an operator or other constructors find potential safety hazards or other emergency situations occur, all actions of the concrete pump truck can be stopped by triggering the emergency stop button so as to avoid safety accidents.

Disclosure of Invention

The invention provides a tight stop safety protection system and a concrete pump truck, which are used for solving the technical problem that the concrete pump truck in the prior art is poor in safety.

The invention provides an emergency stop safety protection system, which comprises an operation emergency stop controller and a plurality of emergency stop buttons, wherein the operation emergency stop controller is connected with the emergency stop buttons; the emergency stop buttons are arranged along the periphery of the body of the concrete pump truck; each emergency stop button comprises a first normally closed contact;

after the first normally closed contacts of the emergency stop buttons are connected in series, the emergency stop buttons are connected with a voltage detection end of the operation emergency stop controller;

and the operation tight stop controller is respectively connected with each operation control module in the concrete pump truck and is used for sending an emergency stop instruction to each operation control module when the voltage detection end detects that the voltage loses a signal.

According to the emergency stop safety protection system provided by the invention, each emergency stop button comprises a second normally closed contact;

after the second normally closed contacts of the emergency stop buttons are connected in series, the second normally closed contacts are connected with the frequency detection end of the operation emergency stop controller;

and the operation emergency stop controller is connected with the alarm module in the concrete pump truck and is used for sending an emergency stop button state abnormity alarm signal to the alarm module when the frequency detection end detects a frequency abnormity signal.

According to the emergency stop safety protection system provided by the invention, the plurality of emergency stop buttons comprise a first emergency stop button, a second emergency stop button, a third emergency stop button, a fourth emergency stop button and a fifth emergency stop button;

the first emergency stop button is arranged on the tail operation box, the second emergency stop button is arranged on the left leg operation box of the automobile body, the third emergency stop button is arranged on the right leg operation box of the automobile body, the fourth emergency stop button is arranged on the electric control cabinet, and the fifth emergency stop button is arranged on the maintenance operation box.

The emergency stop safety protection system further comprises a remote emergency stop button; the remote control emergency stop button is arranged on a remote controller of the concrete pump truck;

and the operation emergency stop controller is connected with the remote controller and is used for sending an emergency stop instruction to each operation control module when receiving the working signal of the remote control emergency stop button.

The emergency shutdown safety protection system further comprises a first reset confirmation button;

the first reset confirmation button is arranged on the remote controller;

and the operation close stop controller is used for resetting based on the received first reset confirmation button working signal.

The emergency shutdown safety protection system further comprises a second reset confirmation button;

the second reset confirmation button is arranged on the tailstock operation box;

and the operation close stop controller is connected with the second reset confirmation button and is used for resetting based on the received working signal of the second reset confirmation button.

The emergency stop safety protection system further comprises a screen emergency stop controller and a screen opening and closing detection device;

the screen opening and closing detection device is used for detecting the opening and closing of the screen and sending a tightly-stopping signal;

the screen tight-stop controller is respectively connected with a stirring control module, a tilt cylinder control module, a pumping control module and an alarm module in the concrete pump truck, and is used for sending an emergency stop instruction to the stirring control module, the tilt cylinder control module and the pumping control module and sending a screen failure alarm signal to the alarm module when detecting that the screen open-close detection device sends a screen tight-stop signal.

According to the emergency stop safety protection system provided by the invention, a first normally closed contact of the screen opening and closing detection device is connected with a first voltage detection end of the screen emergency stop controller; a second normally closed contact of the screen opening and closing detection device is connected with a second voltage detection end of the screen tight stop controller;

and the screen tight stop controller is used for determining that a screen tight stop signal sent by the screen opening and closing detection device is detected when the first voltage detection end and the second voltage detection end simultaneously detect that the voltage loses the signal.

The emergency stop safety protection system further comprises a screen reset confirmation button;

the screen mesh resetting confirmation button is arranged on the tail operation box;

and the screen tight stop controller is connected with the screen reset confirmation button and is used for resetting based on the received working signal of the screen reset confirmation button.

According to the emergency stop safety protection system provided by the invention, the operation emergency stop controller and the screen emergency stop controller both adopt safety relays.

The invention also provides a concrete pump truck which comprises the emergency stop safety protection system.

The invention provides an emergency stop safety protection system and a concrete pump truck, which comprise an operation emergency stop controller and a plurality of emergency stop buttons; the plurality of emergency stop buttons are arranged along the periphery of the body of the concrete pump truck; after the first normally closed contacts of the emergency stop buttons are connected in series, the first normally closed contacts are connected with a voltage detection end of the operation emergency stop controller; when the voltage detection end of the operation emergency stop controller detects that the voltage loses the signal, the operation emergency stop controller sends an emergency stop instruction to each operation control module, so that the emergency stop button can be triggered very conveniently and rapidly by an operator around the concrete pump truck, the mode that the emergency stop buttons are connected in series is adopted, the reliability is high, and the safety of the concrete pump truck is improved.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an emergency shutdown security protection system provided by the present invention;

FIG. 2 is one of the schematic arrangements of the emergency stop button provided by the present invention;

FIG. 3 is a second schematic layout view of the emergency stop button provided in the present invention;

fig. 4 is a schematic flow chart of a method for using the emergency shutdown security protection system provided by the present invention.

Reference numerals:

110: an operation tight stop controller; 120: a shutdown button;

1: a vehicle tail operation box; 2: a left leg operating box;

3: a right leg operating box; 4: an electric control cabinet;

5: maintaining the operation box; 6: a remote controller;

7: a screen opening/closing detection device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The emergency stop safety protection system on the concrete pump truck is used for emergency stop operation construction in the construction process of the concrete pump truck, so that the concrete pump truck is protected. The conventional concrete pump truck protection is realized through a whole truck controller, a possible instability risk is actively detected and judged by adding a sensor, and the emergency protection mode is actively entered to limit a boom or other actions so as to prevent danger. However, the above method has risks such as sensor failure and failure of active protection control logic, and meanwhile, it is impossible to prevent unexpected risks outside the active protection control range.

In response to the deficiencies of the prior art, fig. 1 is a schematic structural diagram of an emergency stop safety protection system provided by the present invention, as shown in fig. 1, the system includes a work emergency stop controller 110 and a plurality of emergency stop buttons 120; a plurality of emergency stop buttons 120 are arranged along the circumference of the body of the concrete pump vehicle; each emergency stop button 120 comprises a first normally closed contact;

after the first normally closed contacts of the multiple emergency stop buttons 120 are connected in series, the first normally closed contacts are connected with the voltage detection end of the operation emergency stop controller 110;

and the operation tight stop controller 110 is respectively connected with each operation control module in the concrete pump truck and is used for sending an emergency stop instruction to each operation control module when the voltage detection end detects that the voltage loses the signal.

Specifically, when the concrete pump truck is in construction operation, an operator observes the boom of the concrete pump truck on a construction site, and controls the boom of the concrete pump truck in real time through a handheld remote controller or a control box arranged on a truck body. The environment of a construction site is complex, and the vehicle control unit is difficult to sense an accident and make a corresponding protection action, so that after risk judgment is carried out by an operator on the site according to an unknown accident, all actions of the concrete pump truck are manually stopped, and the safety of equipment is ensured.

The emergency stop safety protection system provided by the embodiment of the invention comprises a work emergency stop controller 110 and a plurality of emergency stop buttons 120. The emergency stop button 120 is used for opening the normally closed contact and closing the normally open contact when being pressed by an operator. The on-off of the circuit is controlled by the opening and closing of the contacts, so that corresponding signals are sent out. The emergency stop button 120 can be arranged along the periphery of the body of the concrete pump truck, so that an operator can touch the emergency stop button 120 in the shortest time to stop all actions of the concrete pump truck when controlling the concrete pump truck to work on site. The number and the positions of the emergency stop buttons 120 can be set according to actual needs.

The emergency stop button 120 may select a push button switch with multiple contacts. Contact types include normally open contacts and normally closed contacts. When the emergency stop button 120 is not pressed, the normally open contacts are open and the normally closed contacts are closed, and when the emergency stop button 120 is pressed, the normally open contacts are closed and the normally closed contacts are open.

The time from closing to opening of a normally closed contact is much shorter than the time from the natural state to closing of a normally open contact in terms of operating time. This is particularly important when a dangerous emergency stop is required. Mechanically, the emergency stop button 120, whether it is a normally closed or normally open contact, will rebound without bottoming out, thereby disabling actuation. When the normally open contact is used, the emergency stop does not play any role when the emergency stop button 120 is not pressed in place; the normally closed contacts are different, and the emergency stop functions only through the contact action no matter the emergency stop button 120 is pressed in place.

The first normally closed contacts of the plurality of emergency stop buttons 120 may be connected in series to a voltage detection terminal of the work emergency stop controller 110. The first normally closed contact here is one of the pairs of normally closed contacts of the emergency stop button 120. When any one of the emergency stop buttons 120 is pressed, the circuit formed by the series connection of the first normally closed contacts of the emergency stop buttons 120 is in an off state, accordingly, the voltage detection end of the operation emergency stop controller 110 can detect a voltage loss signal, and at the moment, the operation emergency stop controller 110 directly sends an emergency stop instruction to each operation control module connected with the operation emergency stop controller, so that the concrete pump truck is controlled to stop all actions, and the safety of the concrete pump truck is ensured.

The operation emergency stop controller 110 may be disposed on the spot, is not connected to the vehicle controller, and is independent of the control logic of the vehicle controller, thereby providing protection for the concrete pump vehicle. The internal circuitry of the work close-stop controller 110 may be built directly using hard wiring. For example, a relay can be adopted for construction, the voltage of the voltage detection end is used as a relay input signal to control the on-off of a power supply of an electromagnetic coil in the relay, the contact of the relay is connected into a control loop of each operation control module, when the relay input signal is changed, the power supply of the electromagnetic coil is connected or disconnected, so that the state of the contact of the relay is changed, each operation control module is controlled, and the emergency stop protection function is realized.

The emergency stop safety protection system provided by the embodiment of the invention comprises an operation emergency stop controller and a plurality of emergency stop buttons; the plurality of emergency stop buttons are arranged along the periphery of the body of the concrete pump truck; after the first normally closed contacts of the emergency stop buttons are connected in series, the first normally closed contacts are connected with a voltage detection end of the operation emergency stop controller; when the voltage detection end of the operation emergency stop controller detects that the voltage loses the signal, the operation emergency stop controller sends an emergency stop instruction to each operation control module, so that the emergency stop button can be triggered very conveniently and rapidly by an operator around the concrete body, and the reliability is high due to the serial connection mode of the emergency stop buttons, and the safety of the concrete pump truck is improved.

Based on the above embodiment, each emergency stop button comprises a second normally closed contact;

second normally closed contacts of the emergency stop buttons are connected in series and then connected with a frequency detection end of the operation emergency stop controller;

and the operation emergency stop controller is connected with the alarm module in the concrete pump truck and is used for sending an emergency stop button state abnormity alarm signal to the alarm module when the frequency detection end detects a frequency abnormity signal.

Specifically, the second normally closed contact of each emergency stop button can be used for detecting the working state of the emergency stop button.

The second normally closed contacts of the plurality of emergency stop buttons can be connected in series and then connected with the frequency detection end of the operation emergency stop controller. And (3) carrying frequency signals in a circuit formed by connecting the second normally closed contacts of the plurality of emergency stop buttons in series. If the frequency signal is detected to be abnormal, the state of the emergency stop button can be considered to be abnormal, for example, the emergency stop button may have faults such as poor contact of contacts.

And when the operation emergency stop controller detects the frequency abnormal signal, the emergency stop controller sends an emergency stop button state abnormal alarm signal to the alarm module. The alarm module can be arranged in a cab or a remote controller, and can remind an operator in the form of characters, sound or light.

According to the emergency stop safety protection system provided by the embodiment of the invention, the emergency stop button state detection loop is constructed through the second normally closed contacts of the emergency stop buttons, so that the reliability of the emergency stop buttons is improved.

Based on any of the above embodiments, the plurality of emergency stop buttons comprises a first emergency stop button, a second emergency stop button, a third emergency stop button, a fourth emergency stop button, and a fifth emergency stop button;

the first emergency stop button is arranged on the tail operation box, the second emergency stop button is arranged on the left leg operation box of the automobile body, the third emergency stop button is arranged on the right leg operation box of the automobile body, the fourth emergency stop button is arranged on the electric control cabinet, and the fifth emergency stop button is arranged on the maintenance operation box.

Specifically, five buttons may be provided around the body of the concrete pump truck according to the structural characteristics of the concrete pump truck.

The first emergency stop button is arranged on a tailstock operation box, which is also called a small operation box and is usually arranged at a position close to the hopper, and the first emergency stop button comprises 6 twister switches and 1 emergency stop button (the first emergency stop button), and mainly realizes related operations such as displacement adjustment, high-low pressure switching, stirring control and the like. The first emergency stop button here is arranged on the front side of the small operating box to ensure that the emergency stop button can be triggered at the first time when the user finds an emergency stop situation while performing relevant operations at the small operating box.

The second emergency stop button is arranged on the operation box of the left supporting leg of the automobile body, and the third emergency stop button is arranged on the operation box of the right supporting leg of the automobile body. The support leg operation box is usually arranged beside the support leg multi-way valve and consists of 1 torsion switch for controlling the speed rising and 1 emergency stop button (a second emergency stop button or a third emergency stop button).

The fourth emergency stop button is arranged on the electric control cabinet, and the fourth emergency stop button on the electric control cabinet is arranged on the front face of the electric control cabinet, so that the emergency stop button can be triggered at the first time when relevant operation is found in the electric control cabinet by a user, all actions are stopped, and safety is ensured.

The fifth emergency stop button is arranged on a maintenance operation box, the maintenance operation box is arranged at a position close to a water tank of the pumping system, the maintenance operation box consists of 8 twister switches and 1 emergency stop button (the fifth emergency stop button), and the emergency stop button mainly ensures that a user can trigger emergency stop at the first time when the maintenance operation is carried out and emergency situations occur.

Based on any embodiment, the remote control emergency stop button is further included; the remote control emergency stop button is arranged on a remote controller of the concrete pump truck;

and the operation emergency stop controller is connected with the remote controller and is used for sending an emergency stop instruction to each operation control module when receiving a working signal of the remote control emergency stop button.

In particular, a remote control emergency stop button can be arranged on a remote controller of the concrete pump truck in consideration of the actual operation of the concrete pump truck. The remote controller consists of an operating handle, a key and a remote control emergency stop button, and the remote control emergency stop button can be arranged on the side surface of the remote controller.

The working signal of the remote control emergency stop button is a signal sent out when the remote control emergency stop button is pressed. When the operation emergency stop controller receives the working signal of the remote control emergency stop button, the operator can be considered to make judgment that the emergency stop is required based on the current working condition, and at the moment, the operation emergency stop controller sends an emergency stop instruction to each operation control module.

According to the emergency stop safety protection system provided by the embodiment of the invention, the remote control emergency stop button is arranged on the remote controller of the concrete pump truck, so that the concrete pump truck is remotely controlled, operators can be far away from dangerous areas, and the safety of the operators is improved.

According to any one of the above embodiments, the mobile terminal further comprises a first reset confirmation button;

the first reset confirmation button is arranged on the remote controller;

and the operation close stop controller is used for resetting based on the received first reset confirmation button working signal.

Specifically, after confirming that the risk is relieved, not only the emergency stop button needs to be reset, but also secondary confirmation needs to be carried out on the remote controller, so that the operator can recover the action before the emergency stop triggering after confirming that the risk is relieved again.

Therefore, a first reset confirmation button may be provided on the remote controller, and the job close-stop controller is reset according to the received first reset confirmation button operation signal.

According to any one of the above embodiments, the mobile terminal further comprises a second reset confirmation button;

the second reset confirmation button is arranged on the tail operation box;

and the operation close stop controller is connected with the second reset confirmation button and is used for resetting based on the received working signal of the second reset confirmation button.

Specifically, a second reset confirmation button can be arranged on the vehicle tail operation box, and the operation emergency stop controller can reset according to a received working signal of the second reset confirmation button.

Based on any one of the embodiments, the device further comprises a screen tight stop controller and a screen opening and closing detection device;

the screen opening and closing detection device is used for detecting the opening and closing of the screen or the opening and closing degree and sending a close stop signal;

and the screen tight stop controller is respectively connected with the stirring control module, the swing cylinder control module, the pumping control module and the alarm module in the concrete pump truck, and is used for sending an emergency stop instruction to the stirring control module, the swing cylinder control module and the pumping control module and sending a screen failure alarm signal to the alarm module when detecting that the screen tight stop signal is sent by the screen opening and closing detection device.

In particular, screen failure may also occur when the concrete pump truck is operating. At this point, the stirring, tilt cylinder and pumping should be stopped under emergency control, but the control of the boom and legs may not be affected.

The screen failure can be determined by a screen opening/closing detection device attached to the screen. The screen opening/closing detection device detects an opening/closing state and an opening/closing degree of the screen. And if the opening degree of the screen exceeds a set value, sending a screen fault signal or a close stop signal.

For example, the sieve opening and closing detection means may comprise a radio frequency sensor. Radio frequency sensor installs on the hopper side, and the response piece is fixed on the hopper screen cloth and can be followed the screen cloth and move together, and the interval between response piece and the screen cloth increases when the screen cloth is opened, just can give the switching value signal after the detection range that surpasss radio frequency sensor apart from, and the generation of switching value signal is realized through opening normally closed contact or closing normally open contact, and this switching value signal can regard as the screen cloth and tightly stop the signal.

Based on any embodiment, the first normally closed contact of the screen opening and closing detection device is connected with the first voltage detection end of the screen tight stop controller; a second normally closed contact of the screen opening and closing detection device is connected with a second voltage detection end of the screen tight stop controller; when the first voltage detection end and the second voltage detection end lose voltage simultaneously, the screen opening and closing detection device sends a screen tight stop signal.

And the screen tight stop controller is used for determining that a screen tight stop signal sent by the screen opening and closing detection device is detected when the first voltage detection end and the second voltage detection end simultaneously detect that the voltage loses the signal.

Specifically, a first normally closed contact of the screen opening and closing detection device is connected with a first voltage detection end of the screen tight stop controller, and a second normally closed contact of the screen opening and closing detection device is connected with a second voltage detection end of the screen tight stop controller.

When the first voltage detection end and the second voltage detection end simultaneously detect that the voltage loses the signal, the screen tight stop controller can consider that the screen tight stop signal is detected, and the screen tight stop signal is reliable, immediately sends an emergency stop instruction to the stirring control module, the swing cylinder control module and the pumping control module, sends a screen failure alarm signal to the alarm module, and simultaneously realizes emergency protection and emergency alarm.

Based on any one of the above embodiments, the device further comprises a screen reset confirmation button;

the screen mesh resetting confirmation button is arranged on the vehicle tail operation box;

and the screen tight stop controller is connected with the screen reset confirmation button and is used for resetting based on the received screen reset confirmation button working signal.

Specifically, since it is necessary to check the state at the hopper before the recovery action to ensure that the screen is actually closed, the reset confirmation can be performed only on the tail operation box near the hopper, and a screen reset confirmation button may be provided on the tail operation box.

And the screen tight stop controller resets according to the received screen reset confirmation button working signal.

Based on any one of the above embodiments, the operation close stop controller and the screen close stop controller both adopt safety relays.

Specifically, the safety relay is a control part necessary in a safety loop, receives a safety input, and deterministically outputs a switching signal to a control loop of the device by judgment of an internal loop. In short, the safety relays are of a double-channel signal type, and the safety relays can normally work only when the signals of the two channels are normal; in the working process, as long as any one channel signal is disconnected, the safety relay stops outputting until the two channel signals are normal and can not normally work after being reset.

In order to improve the reliability of the emergency stop safety protection system, safety relays can be adopted for both the operation emergency stop controller and the screen emergency stop controller.

Based on any one of the embodiments, the embodiment of the invention provides a concrete pump truck which comprises the emergency stop safety protection system.

Specifically, the concrete pump truck in the embodiment of the invention can be a concrete pump truck driven by a fuel engine, and can also be a concrete pump truck driven by a battery.

Based on any one of the above embodiments, an embodiment of the present invention provides an emergency stop protection system, including two parts: normal hold-down and screen hold-down.

The common emergency stop is arranged at an electric cabinet, a supporting leg operation box, a maintenance operation box, a small operation box (tail operation box) and a remote controller, and when the common emergency stop is triggered, all actions of the arm support, the supporting leg, pumping and the like can be stopped, so that the safety is ensured. After confirming that the risk is relieved, the ordinary emergency stop needs to reset an emergency stop button, and needs to perform secondary confirmation on a remote controller or a small operation box, so that an operator can recover the action before the emergency stop is triggered after confirming that the risk is relieved again.

The screen tight stopping is mainly to judge whether people or other objects enter the hopper (at the moment, the stirring shaft rotates) by detecting whether the screen is opened or not, if the screen is detected to be opened, the stirring and pumping actions are automatically stopped to confirm the safety, but other actions such as the arm support, the supporting legs and the like are not influenced, and other actions which are irrelevant to the pumping can be normally operated.

The reset of the screen tight stop different from the ordinary tight stop is only confirmed on a small operation box close to the hopper (the remote reset cannot be realized on a remote controller), because an operator needs to perform secondary confirmation on the opening state of the screen by the hopper attachment before the reset operation, so that the operation safety is ensured.

Fig. 2 is a schematic diagram of an arrangement of an emergency stop button provided by the present invention, fig. 3 is a second schematic diagram of an arrangement of an emergency stop button provided by the present invention, as shown in fig. 2 and fig. 3, an emergency stop protection system provided by an embodiment of the present invention includes 6 conventional emergency stop buttons and 1 screen opening/closing detection device (trigger screen emergency stop signal), and the 6 emergency stop buttons are arranged at positions easily accessible by an operator when performing related operation operations, so as to ensure that emergency stop can be triggered at the first time when an emergency occurs. 6 conventional emergency stop buttons are respectively arranged on a vehicle tail operation box 1, a left side supporting leg operation box 2, a right side supporting leg operation box 3, an electric control cabinet 4, a maintenance operation box 5 and a remote controller 6. The screen opening/closing detection device 7 is provided in the hopper screen.

The emergency stop safety protection system provided by the embodiment of the invention consists of a common emergency stop part and a screen emergency stop part, wherein signals of the two emergency stop parts do not enter a controller, and two safety relays are directly connected with an actuating mechanism respectively. When the ordinary emergency stop is triggered, all actions of the pump truck stop, when the screen emergency stop is triggered, only actions related to pumping functions such as pumping, stirring and cylinder swinging are stopped, and the arm support and the supporting legs can still normally act without limitation.

The ordinary emergency stop buttons of the emergency stop safety protection system are normally closed contacts and are connected by adopting double loops, wherein one loop is a voltage signal, and the other loop is a frequency signal. Wherein frequency signal return circuit mainly used can carry out real-time supervision to the emergency stop button, can report to the police on the display screen on automatically controlled cabinet when discovering emergency stop button appearance anomaly to the suggestion user overhauls the maintenance to the emergency stop button, ensures the reliability of emergency stop button. The voltage signal loop is used for triggering an actual emergency stop signal, and as all the emergency stop buttons are connected in series, the loop is disconnected when any one emergency stop button is pressed, so that the emergency stop signal is triggered.

The screen tight stop consists of two voltage signal loops and is two groups of normally closed contacts. When the normally closed contact is disconnected due to the fact that the screen switch breaks down, an alarm can be given on the display screen to prompt a user to conduct troubleshooting operation on the screening detection device. When the screen is opened, the normally closed contact of the screen switch is also disconnected, so that a screen tight stop signal is triggered, actions such as stirring, pumping and the like are stopped at the moment, and the energy accumulator performs pressure relief operation.

The emergency stop safety protection system still needs to carry out corresponding reset confirmation after the emergency stop signal is eliminated, and the action before the emergency stop triggering can be recovered, and the common emergency stop can carry out reset confirmation on a small operation box and a remote controller. Screen tight shut-down reset confirmation can only be made on a small operating box near the hopper, since it is necessary to check the condition at the hopper before resuming action to ensure that the screen is actually closed.

Fig. 4 is a schematic flow chart of a method for using the emergency shutdown security protection system provided by the present invention, as shown in fig. 4, the method includes:

step one, after a concrete pump truck is started, reading the working state of an emergency stop button, if the emergency stop button is abnormal, not performing any operation at present, displaying and alarming on a display screen of an electric control cabinet, and performing troubleshooting and confirmation by a user; if the emergency stop button is normal, prompting the user that the operation can be normally carried out;

continuously detecting the emergency stop signal in the process of operating by the user, and if the emergency stop signal is not detected, enabling the user to normally operate; if the emergency stop signal is detected, confirming the source of the emergency stop signal;

and step three, if the emergency stop signal is triggered by the screen detection device, stopping pumping, stirring and cylinder swinging, and if the emergency stop signal is not triggered by the screen detection device, stopping all actions of the pump truck.

The emergency safety protection system provided by the embodiment of the invention has the following advantages:

1) the emergency stop signal does not enter the controller, and two safety relays are directly used for realizing the hard-line control of the emergency stop, and the safety level of an emergency stop loop is high;

2) the screen tight stop and the common tight stop are separated, different reset buttons are adopted, the screen tight stop reset button is close to the hopper, so that the condition of the screen can be well known before reset operation is carried out, the screen is confirmed to be put down again, the common tight stop can be operated on a remote controller or a small operation box, and the convenience of operation is improved on the premise of ensuring safety;

3) after the emergency stop switch is reset, the action before the emergency stop trigger can be recovered by operating a reset confirmation button, and a secondary confirmation link is provided.

4) The double-loop emergency stop control loop is adopted, the state of the emergency stop switch can be monitored in real time, the emergency stop switch can be timely alarmed and prompted to maintain when the emergency stop switch breaks down, the emergency stop can be used when the emergency stop switch is required, and the reliability of the system is greatly improved.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes commands for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.