Pulse control device capable of preventing dry grinding of shaftless screw conveyor

Abstract

The utility model relates to a pulse control device capable of preventing a shaftless screw conveyor from dry grinding. The pulse control device comprises a first time delay module, a second time delay module, a first switch module and a second switch module, the pulse output module obtains corresponding pulse signals according to the two switching states of the first switching module; the shaftless screw conveyor controls the on-off state of the shaftless screw conveyor according to the intermediate pulse signal; when the first switch module is in the intermediate state, the state switching module switches the first switch module from the intermediate state to the initial state. According to the arrangement, the state switching time of the first switch module is prolonged through the first time delay module, so that the pulse output module outputs pulse signals in a delayed mode, delayed starting of the shaftless screw conveyor is achieved, the abrasion loss of a bearing bush abrasion-resistant layer is reduced, and the service life of the shaftless screw conveyor is prolonged; and the first switch module is switched from the middle state to the initial state through the state switching module, so that a precondition is created for stopping the operation of the shaftless screw conveyor.

Description

Technical Field

[0001] The utility model relates to the technical field of pulse control devices, in particular to a pulse control device which can be used to prevent dry grinding of a shaftless screw conveyor. Background Art

[0002] It usually takes about three minutes for the belt sludge dewatering machine to start taking in sewage and for the mud cake to fall into the shaftless screw conveyor. During this period, the shaftless screw conveyor has already started running. The common technical solution is to start the belt sludge dewatering machine and the shaftless screw conveyor at the same time. However, due to the lack of sludge, the shaftless screw conveyor and the bearing lack lubrication. Direct contact will continuously cause dry grinding of the wear-resistant layer on the surface of the bearing, which will accelerate the wear and loss of the wear-resistant layer, resulting in the shaftless screw conveyor being unable to operate normally, seriously affecting the continuity and capacity of production.

[0003] In the prior art, the start and stop of the shaftless screw conveyor is controlled by operating the same button, that is, the start operation is to press the button, and the button sends a rising edge pulse signal. After receiving the signal, the PLC outputs the control contactor to control the start of the shaftless screw conveyor; the stop operation is to press the same button, and the principle is the same as the start process. However, at this time, the shaftless screw conveyor and the bearing are still lacking in lubrication, and the wear problem of the bearing wear-resistant layer has not been solved. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a pulse control device that can be used to prevent dry grinding of a shaftless screw conveyor, comprising a power switch module, a first delay module, a first switch module, a pulse output module and a state switching module, wherein the power switch module, the first delay module and the first switch module are connected in sequence, and the first switch module is connected to the pulse output module and the state switching module;

[0005] The first switch module has two switch states, the two switch states are an initial state and an intermediate state;

[0006] One end of the power switch module is connected to the power supply, and is used to control the on / off state of the first delay module according to its own on / off state;

[0007] The first delay module is used to prolong the time required for the first switch module to switch from the initial state to the intermediate state;

[0008] The pulse output module is connected to an external shaftless screw conveyor, and is used to obtain an initial pulse signal and an intermediate pulse signal according to two switch states of the first switch module, and output the initial pulse signal and the intermediate pulse signal to the shaftless screw conveyor;

[0009] The shaftless screw conveyor controls its own opening and closing state according to the intermediate pulse signal;

[0010] Wherein, when the first switch module is in the intermediate state, the state switching module is used to convert the first switch module from the intermediate state to the initial state.

[0011] Preferably, the initial pulse signal is a falling edge pulse signal or a rising edge pulse signal; and the intermediate pulse signal is a rising edge pulse signal or a falling edge pulse signal.

[0012] Preferably, a second delay module is included, which is connected to the power switch module and the state switching module, and is used to control its own on / off state according to the on / off state of the power switch module, and when the second delay module is in the closed state, the start-up time of the state switching module will be extended;

[0013] The startup time of the state switching module is greater than the time required for the first switch module to switch from an initial state to an intermediate state.

[0014] Preferably, the state switching module is a second switch module, and the second switch module is connected to the power switch module. When the second delay module starts the delay, the second switch module will change from an initial closed state to an open state. At this time, the power switch module, the first delay module and the first switch are all powered off.

[0015] Preferably, a self-locking module is included, which is connected to the power switch module and the first delay module, and is used to control the connection state between itself and the power supply according to the closing trigger signal of the power switch module, and to control the opening and closing state of the first delay module according to the connection state between itself and the power supply.

[0016] Preferably, the power switch module is a click button.

[0017] Preferably, a second delay module is included, which is connected to the self-locking module and the state switching module, and is used to control its own opening and closing state according to the connection state between the self-locking module and the power supply, and when the second delay module is in the closed state, the start time of the state switching module will be extended;

[0018] The startup time of the state switching module is greater than the time required for the first switch module to switch from an initial state to an intermediate state.

[0019] Preferably, the state switching module is a second switch module, and the second switch module is connected to the self-locking module. When the second delay module starts the delay, the second switch module will change from the initial closed state to the open state. At this time, the power switch module, the first delay module and the first switch are all powered off.

[0020] Preferably, an indicator light module is included, and the indicator light module is connected to the first switch module and is used to determine the on / off state of the indicator light module according to the two switch states of the first switch module.

[0021] Preferably, a manual control module is included, which is connected to the power switch module and the pulse output module, and is used to control its own on / off state according to the on / off state of the power switch module, and control the pulse output module to output a corresponding pulse signal according to its own on / off state.

[0022] The beneficial effects of the utility model are as follows: the on / off state of the first delay module is controlled by the user controlling the on / off state of the power switch module; the time for the first switch module to switch from the initial state to the intermediate state is extended by the first delay module, so that the pulse output module delays the output of the pulse signal, thereby realizing the delayed start of the shaftless screw conveyor, reducing the wear of the bearing wear-resistant layer, and extending its service life; and the first switch module is switched from the intermediate state to the initial state by the state switching module, thus creating a prerequisite for the shaftless screw conveyor to stop operating. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0024] Figure 1 This is a principle block diagram of the utility model;

[0025] Figure 2 The circuit diagram of Example 1 of the utility model;

[0026] Figure 3 This is a circuit diagram of Example 2 of the present utility model. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0028] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0029] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but not to limit the scope of protection of the present invention.

[0030] Embodiment 1:

[0031] like Figure 1 to Figure 2 As shown, it is embodiment 1 of the utility model, comprising a power switch module, a first delay module, a first switch module, a pulse output module and a state switching module, the power switch module, the first delay module and the first switch module are connected in sequence, and the first switch module is connected to the pulse output module and the state switching module;

[0032] The first switch module has two switch states, the two switch states are an initial state and an intermediate state;

[0033] One end of the power switch module is connected to the power supply, and is used to control the on / off state of the first delay module according to its own on / off state;

[0034] The first delay module is used to prolong the time required for the first switch module to switch from the initial state to the intermediate state;

[0035] The pulse output module is connected to an external shaftless screw conveyor, and is used to obtain an initial pulse signal and an intermediate pulse signal according to two switch states of the first switch module, and output the initial pulse signal and the intermediate pulse signal to the shaftless screw conveyor;

[0036] The shaftless screw conveyor controls its own opening and closing state according to the intermediate pulse signal;

[0037] Wherein, when the first switch module is in the intermediate state, the state switching module is used to convert the first switch module from the intermediate state to the initial state.

[0038] It can be understood that the on / off state of the first delay module is controlled by the user controlling the on / off state of the power switch module; the time for the first switch module to switch from the initial state to the intermediate state is extended by the first delay module, so that the pulse output module delays the output of the pulse signal, and the shaftless screw conveyor can be delayed to start, reduce the wear of the bearing wear-resistant layer, and extend its service life; and the first switch module is switched from the intermediate state to the initial state by the state switching module, and the above is the start-up process of the shaftless screw conveyor;

[0039] The stopping process of the shaftless screw conveyor is consistent with the starting process, and the first switch module is transferred from the initial state to the intermediate state, and then from the intermediate state to the initial state; therefore, the state conversion module during the starting process of the shaftless screw conveyor transfers the first switch module from the intermediate state to the initial state in order to create the prerequisite for the stopping operation of the shaftless screw conveyor.

[0040] The initial pulse signal is a falling edge pulse signal or a rising edge pulse signal; the intermediate pulse signal is a rising edge pulse signal or a falling edge pulse signal.

[0041] It can be understood that in this embodiment 1, the initial pulse signal can be a falling edge pulse signal, and the intermediate pulse signal can be a rising edge pulse signal; or the initial pulse signal can be a rising edge pulse signal, and the intermediate pulse signal can be a falling edge pulse signal.

[0042] The second delay module is connected to the power switch module and the state switching module, and is used to control its own on / off state according to the on / off state of the power switch module, and when the second delay module is in the closed state, the start-up time of the state switching module is extended;

[0043] The startup time of the state switching module is greater than the time required for the first switch module to switch from an initial state to an intermediate state.

[0044] It can be understood that the startup time of the state switching module is greater than the time required for the first switch module to switch from the initial state to the intermediate state, so that the state switching module is started after the first switch module.

[0045] The state switching module is a second switch module, which is connected to the power switch module. When the second delay module starts the delay, the second switch module will change from the initial closed state to the open state. At this time, the power switch module, the first delay module and the first switch are all powered off.

[0046] It can be understood that, in this embodiment 1, the second switch module can be any electronic component with a switch function.

[0047] In this embodiment 1, the power switch module is always in the closed state during the startup process of the shaftless screw conveyor. When the shaftless screw conveyor is stopped, the power switch module can be first turned from the closed state to the open state, and then from the open state to the closed state, and the power switch module is always kept in the closed state.

[0048] The power switch module, the first switch module and the state switching module are all any electronic components with a switch function, the first delay module and the second delay module can be any electronic components with a delay function. In this embodiment 1, the first delay module and the first switch module are the first delay relay KT1; the second delay module and the state switching module are the second delay relay KT2; the power switch module is a button SB1.

[0049] Embodiment 2:

[0050] The present embodiment 2 has the same contents as the embodiment 1, and will not be described again here.

[0051] like Figure 1 and Figure 3 The above is Embodiment 2 of the utility model, which includes a self-locking module, which is connected to the power switch module and the first delay module, and is used to control the connection state between itself and the power supply according to the closing trigger signal of the power switch module, and control the opening and closing state of the first delay module according to the connection state between itself and the power supply.

[0052] The power switch module is a click button.

[0053] It is understandable that the self-locking module can maintain a connection with the power supply according to the closing trigger signal of the power switch module. At this time, the power switch module does not need to be in a closed state all the time, and a click button can be used. The click button can be pressed to release the button immediately;

[0054] It includes a second delay module, which is connected to the self-locking module and the state switching module, and is used to control its own opening and closing state according to the connection state between the self-locking module and the power supply, and when the second delay module is in the closed state, the start time of the state switching module will be extended;

[0055] The startup time of the state switching module is greater than the time required for the first switch module to switch from an initial state to an intermediate state.

[0056] The state switching module is a second switch module, which is connected to the self-locking module. When the second delay module starts the delay, the second switch module will change from the initial closed state to the open state. At this time, the power switch module, the first delay module and the first switch are all powered off.

[0057] It can be understood that in the present embodiment 2, the state switching module realizes the conversion of the first switch module from the intermediate state to the initial state by connecting the second switch module to the self-locking module, and when the second switch module is turned from the initial closed state to the open state, the self-locking module is in a power-off state (i.e., the open state), and the first delay module is in a power-off state (i.e., the open state), and when the first delay module is in the open state, the first switch module will be turned from the intermediate state to the initial state, thus completing a shaftless screw conveyor startup process, and the shaftless screw conveyor stop process is consistent with the shaftless screw conveyor startup process.

[0058] It comprises an indicator light module, which is connected to the first switch module and is used to determine the on / off state of the indicator light module according to the two switch states of the first switch module.

[0059] It includes a manual control module, which is connected to the power switch module and the pulse output module, and is used to control its own on / off state according to the on / off state of the power switch module, and control the pulse output module to output a corresponding pulse signal according to its own on / off state.

[0060] The self-locking module is any electronic component with a self-locking function, and the manual control module is any electronic component with a switch function. In this embodiment 2, the self-locking module is an intermediate relay KA, and the manual control module is a rotary switch SA1.

[0061] The specific working process of this embodiment 2 is as follows:

[0062] When the rotary switch SA1 is in the manual control position, the operator still starts and stops the shaftless screw conveyor according to the existing operation method, that is, when the button SB1 is pressed and released, the pulse signal is input to the PLC, and the control device starts; when the button SB1 is pressed again and released, the pulse signal is input to the PLC, and the control device stops running.

[0063] When the rotary switch is in the delay control position, the operator presses and releases the button SB1, the intermediate relay KA coil is energized and uses its own normally open contacts to complete self-locking. At this time, the delay relay KT2 coil is energized and starts the delay action. At the same time, the delay relay KT1 coil is also energized and starts the delay action, and the delay working indicator HL1 also starts to light up.

[0064] After the delay setting time, the KT1 delayed closing contact completes the closing action, and then outputs a high level signal to the PLC, and the PLC control device starts to run;

[0065] After a set delay time, the KT2 delayed disconnection contact completes the disconnection action, causing the KA and KT2 coils to lose power at the same time. At this time, the two pairs of normally open contacts of KA are converted from closed to the initial disconnected state, causing the KT1 coil to lose power. The KT1 delayed closing contact is immediately converted from closed to the initial disconnected state, and the high-level output is immediately converted to a low-level output.

[0066] At this point, the delayed single pulse signal has been sent and returns to the initial ready state. At this time, the equipment still maintains normal operation and can be shut down at any time. The shutdown operation process is the same as the startup process.

[0067] A person skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, disk, CD-ROM, etc.

[0068] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

[0069] It should be noted that the embodiments of the present invention can be implemented by hardware, software, or a combination of software and hardware. The hardware portion can be implemented using dedicated logic; the software portion can be stored in a memory and executed by an appropriate instruction execution system, such as a microprocessor or dedicated design hardware. Those skilled in the art will appreciate that the above-mentioned devices and methods can be implemented using computer executable instructions and / or contained in a processor control code, such as providing such code on a programmable memory or a data carrier such as an optical or electronic signal carrier.

[0070] In addition, although the operation of the utility model method is described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in this specific order, or that all the operations shown must be performed to achieve the desired results. On the contrary, the steps depicted in the flow chart can change the order of execution. Additionally or alternatively, some steps can be omitted, multiple steps can be combined into one step for execution, and / or one step can be decomposed into multiple steps for execution. It should also be noted that the features and functions of two or more devices according to the utility model can be embodied in one device. Conversely, the features and functions of a device described above can be further divided into being embodied by multiple devices.

[0071] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A pulse control device for preventing dry grinding of a shaftless screw conveyor, characterized in that: It includes a power switch module, a first delay module, a first switch module, a pulse output module and a state switching module, wherein the power switch module, the first delay module and the first switch module are connected in sequence, and the first switch module is connected to the pulse output module and the state switching module; The first switch module has two switch states, the two switch states are an initial state and an intermediate state; One end of the power switch module is connected to the power supply, and is used to control the on / off state of the first delay module according to its own on / off state; The first delay module is used to prolong the time required for the first switch module to switch from the initial state to the intermediate state; The pulse output module is connected to an external shaftless screw conveyor, and is used to obtain an initial pulse signal and an intermediate pulse signal according to two switch states of the first switch module, and output the initial pulse signal and the intermediate pulse signal to the shaftless screw conveyor; The shaftless screw conveyor controls its own opening and closing state according to the intermediate pulse signal; Wherein, when the first switch module is in the intermediate state, the state switching module is used to convert the first switch module from the intermediate state to the initial state.

2. The pulse control device for preventing dry grinding of a shaftless screw conveyor according to claim 1, characterized in that: The initial pulse signal is a falling edge pulse signal or a rising edge pulse signal, the intermediate pulse signal is a rising edge pulse signal or a falling edge pulse signal, and the initial pulse signal and the intermediate pulse signal are opposite signals.

3. The pulse control device for preventing dry grinding of a shaftless screw conveyor according to claim 1, characterized in that: The second delay module is connected to the power switch module and the state switching module, and is used to control its own on / off state according to the on / off state of the power switch module, and when the second delay module is in the closed state, the start-up time of the state switching module is extended; The startup time of the state switching module is greater than the time required for the first switch module to switch from the initial state to the intermediate state.

4. The pulse control device for preventing dry grinding of a shaftless screw conveyor according to claim 3 is characterized in that: The state switching module is a second switch module, which is connected to the power switch module. When the second delay module starts the delay, the second switch module will change from the initial closed state to the open state. At this time, the power switch module, the first delay module and the first switch are all powered off.

5. The pulse control device for preventing dry grinding of a shaftless screw conveyor according to claim 1, characterized in that: It includes a self-locking module, which is connected to the power switch module and the first delay module, and is used to control the connection state between itself and the power supply according to the closing trigger signal of the power switch module, and to control the opening and closing state of the first delay module according to the connection state between itself and the power supply.

6. The pulse control device for preventing dry grinding of a shaftless screw conveyor according to claim 5, characterized in that: The power switch module is a click button.

7. The pulse control device for preventing dry grinding of a shaftless screw conveyor according to claim 5, characterized in that: It includes a second delay module, which is connected to the self-locking module and the state switching module, and is used to control its own opening and closing state according to the connection state between the self-locking module and the power supply, and when the second delay module is in the closed state, the start time of the state switching module will be extended; The startup time of the state switching module is greater than the time required for the first switch module to switch from the initial state to the intermediate state.

8. The pulse control device for preventing dry grinding of a shaftless screw conveyor according to claim 7, characterized in that: The state switching module is a second switch module, which is connected to the self-locking module. When the second delay module starts the delay, the second switch module will change from the initial closed state to the open state. At this time, the power switch module, the first delay module and the first switch are all powered off.

9. The pulse control device for preventing dry grinding of a shaftless screw conveyor according to claim 1, characterized in that: It comprises an indicator light module, which is connected to the first switch module and is used to determine the on / off state of the indicator light module according to the two switch states of the first switch module.

10. The pulse control device for preventing dry grinding of a shaftless screw conveyor according to claim 1, characterized in that: It includes a manual control module, which is connected to the power switch module and the pulse output module, and is used to control its own on / off state according to the on / off state of the power switch module, and control the pulse output module to output a corresponding pulse signal according to its own on / off state.

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