A cutting device for cutting fittings for mechanical and electrical installations

Abstract

This invention relates to the field of plasma cutting machine technology, specifically disclosing a cutting device for electromechanical installation accessories, including a power supply unit and a cutting head; it also includes a holding frame, an adjustment component located between the holding frame and the cutting head, a fixing frame fixed to the output end of the cutting head, and an interlayer spacing detection component. This cutting device for electromechanical installation accessories improves grip stability and reduces the risk of slipping during operation through the anti-slip holding frame. Furthermore, when the cutting head cuts multiple layers of thin steel plates, the interlayer spacing detection component sprays auxiliary gas into the cut gap, which, while cleaning up the residue after cutting, uses the back pressure of the airflow during the jet to detect the interlayer spacing of the multiple layers of thin steel plates. If the interlayer spacing is large, the back pressure when the airflow is ejected is small. At this time, the cutting head is prone to producing slag during cutting. The interlayer spacing detection component automatically increases the airflow intensity to enhance the cleaning effect of the slag.

Description

Technical Field

[0001] This invention relates to the field of plasma cutting machine technology, specifically to a cutting device for electromechanical installation accessories. Background Technology

[0002] Electromechanical installation accessory cutting devices are specialized equipment used in electromechanical installation projects for the precise cutting and processing of various metal and non-metal accessories (such as steel pipes, angle steel, plates, and plastic fittings). Their core function is to process raw materials or semi-finished products into accessories that meet installation dimensional requirements, ensuring the installation accuracy and stability of electromechanical systems (such as pipes, cable trays, and equipment connections). In electromechanical installation, there are often discrepancies between the design drawings and the actual dimensions on site (such as pipeline routing and equipment location). Prefabricated accessories (such as steel pipes, angle steel brackets, and steel plate bases) need to be modified on site. At this time, workers often use handheld plasma cutting machines to process the accessories.

[0003] A handheld plasma cutter is a portable, handheld plasma cutting device. Its core function is to rapidly melt metal materials (such as carbon steel and low alloy steel) using a high-temperature plasma arc, and then use a high-speed airflow to blow away the molten slag, thereby achieving the cutting, drilling, or contour cutting of metal parts. When in use, press the cutting gun switch, and the main unit outputs a high-frequency, high-voltage current, generating an electric arc between the electrode and the nozzle. This ionizes the introduced working gas (such as compressed air), forming a high-temperature plasma arc (temperatures can reach 15,000-30,000℃). The plasma arc contacts the surface of the metal material, instantly melting the metal. At the same time, a high-speed airflow (provided by an air source) blows the molten metal slag away from the cut, forming a cut or contour. Releasing the switch extinguishes the electric arc, stops the gas output, and the cutting ends.

[0004] When mass-producing thin steel plate gaskets (1-2mm thick) for pipe supports, multiple layers of thin steel plates (such as 3-5 layers, with a total thickness ≤6mm) are usually stacked and cut. If there are gaps between the layers, the plasma arc will melt multiple layers of material at the same time. The slag accumulates in the gaps between the layers, and the airflow has difficulty penetrating the gaps between the multiple layers, resulting in interlayer fusion and slag adhesion, and the cuts of the upper and lower layers sticking together.

[0005] When using a handheld plasma cutter to cut multi-layer thin steel plates, workers need to first use mechanical clamping to fix the stacked layers, and then pre-cut the stacked thin steel plates to adjust parameters such as air pressure and current intensity. Some workers also place small metal or high-temperature resistant non-metallic gaskets (such as copper wire or ceramic particles) between the steel plates to form tiny gaps, reduce the direct contact area between the steel plates, and reduce the probability of adhesion. However, the difference in materials and stacking conditions means that workers need to repeat the above operations every time they cut a batch of stacked thin steel plates, which not only increases the workload of workers but also reduces processing efficiency. To address this, we propose a cutting device for electromechanical installation accessories. Summary of the Invention

[0006] The purpose of this invention is to provide a cutting device for electromechanical installation accessories, in order to solve the problem mentioned in the background art that the difference between the material and the stacking state requires the operator to repeat the above operation every time a batch of stacked thin steel plates is cut, which not only increases the workload of the operator but also reduces the processing efficiency.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a cutting device for electromechanical installation accessories, comprising a power supply unit and a cutting head; and further comprising a holding frame located outside the cutting head; The control component is located between the holding frame and the cutting head. When the operator moves the holding frame faster, the control component reduces the moving speed of the cutting head; when the operator moves the holding frame slower, the control component increases the moving speed of the cutting head. The mounting bracket is fixed to the output end of the cutting head; The interlayer spacing detection component is connected to the fixed frame. During the cutting process of the cutting head cutting multiple thin steel plates, the interlayer spacing detection component sprays auxiliary gas onto the cutting seam of the steel plate surface at the cutting point, and detects the interlayer spacing of the multiple thin steel plates according to the back pressure of the airflow during the spraying. The interlayer spacing detection component controls the spraying intensity according to the detection results. Based on the interlayer spacing detected by the interlayer spacing detection component, the control component adjusts the cutting head's movement speed to match the optimal movement speed for the current interlayer spacing.

[0008] The control component includes a miniature electric telescopic rod fixedly connected to the holding frame. A button battery is fixedly connected to the outside of the miniature electric telescopic rod. The output end of the miniature electric telescopic rod is fixed to the cutting head. A speed detection device for detecting the moving speed of the cutting head is provided on the outside of the fixed frame.

[0009] The moving speed detection component includes a connecting column fixedly connected to the side of the fixed frame away from the cutting head, a roller rotatably connected to the outside of the connecting column, a photoelectric sensor transmitter installed on the inner wall of the connecting column, a photoelectric sensor receiver installed on the outside of the roller, and a controller installed on the outside of the connecting column. The controller is connected to the photoelectric sensor receiver and the miniature electric telescopic rod respectively.

[0010] The interlayer spacing detection component includes a guide block, which is fixed to a mounting frame. The inner wall of the mounting frame has a guide hole, and an air supply pipe is installed on the outer side of the mounting frame. One end of the air supply pipe is connected to the power supply unit, and the other end of the air supply pipe is connected to the guide hole. An air chamber is formed on the inner wall of the guide block, and an exhaust hole is connected to the outer side of the air chamber. A metal hose is fixedly connected to the outer side of the guide block, and the metal hose is connected to the exhaust hole. A nozzle is fixedly connected to the end of the metal hose away from the guide block. A back pressure detection element for detecting the back pressure of the airflow is provided on the inner wall of the air chamber, and an adjustment element for adjusting the flow cross-section of the guide hole is provided on the inner wall of the guide hole.

[0011] The back pressure detection component includes a diaphragm, which is fixed to the inner wall of the air cavity. A detection rod is fixedly connected to the outer side of the diaphragm. A sliding rheostat is installed on the inner wall of the air cavity. The detection rod is connected to the slider of the sliding rheostat. A return spring is provided on the outer side of the detection rod. One end of the return spring is fixed to the diaphragm, and the other end of the return spring is fixed to the housing of the sliding rheostat.

[0012] The inner diameter of the exhaust port is smaller than that of the guide port.

[0013] The adjusting component includes an adjusting groove on the inner wall of the fixed frame, which is connected to the guide hole. A piston plate is slidably connected to the inner wall of the adjusting groove. The piston plate blocks the guide hole. A control component is provided on the outside of the piston plate to drive the piston plate to move when the resistance of the sliding rheostat changes.

[0014] The control component includes a transmission rod fixedly connected to the piston plate, the transmission rod being slidably connected to the inner wall of the fixed frame, an iron plate being fixedly connected to the end of the transmission rod away from the piston plate, the iron plate being slidably connected to the inner wall of the fixed frame, an electromagnet being provided on the outer side of the iron plate, the electromagnet being installed on the inner wall of the fixed frame, and the electromagnet being connected to a sliding rheostat.

[0015] The transmission rod is equipped with a compression spring on its outer side. One end of the compression spring is fixed to the piston plate, and the other end of the compression spring is fixed to the inner wall of the adjustment groove.

[0016] The adjustment groove is U-shaped and divides the guide hole into two parts.

[0017] This invention has at least the following beneficial effects: 1. When in use, this application improves grip stability through the anti-slip grip frame, reducing the risk of slipping during operation. Furthermore, when the cutting head cuts multiple layers of thin steel plates, the interlayer spacing detection component sprays auxiliary gas into the cut gap. This not only cleans up the residue after cutting but also detects the interlayer spacing of the multiple layers of thin steel plates using the back pressure of the airflow during the jet. If the interlayer spacing is large, the back pressure when the airflow is ejected is small. In this case, the cutting head is prone to producing slag during cutting. The interlayer spacing detection component will automatically increase the airflow intensity to enhance the cleaning effect of the slag.

[0018] 2. When detecting the interlayer spacing of multi-layer thin steel plates, the interlayer spacing detection component will feed back the optimal cutting speed range of the cutting head to the control component based on the interlayer spacing. When the control component detects that the cutting speed of the cutting head is not within this cutting speed range, the control component will control the relative movement of the cutting head and the holding frame, thereby controlling the cutting speed of the cutting head to match the cutting speed of the current interlayer spacing. This avoids the cutting trajectory from breaking due to the holding frame moving too fast, or local overheating and burning due to the holding frame moving too slow, thus improving the continuity and accuracy of cutting. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the cutting head structure of the present invention; Figure 3 This is a schematic diagram of the control component structure of the present invention; Figure 4 This is a schematic diagram of the movement speed detection component of the present invention; Figure 5 This is a schematic diagram of the interlayer spacing detection component of the present invention; Figure 6 This is a side sectional view of the guide block structure of the present invention; Figure 7 for Figure 6 Enlarged diagram of area A in the middle; Figure 8 This is a schematic diagram of Embodiment 2 of the present invention.

[0020] In the diagram: 1. Power supply unit; 2. Cutting head; 3. Holding frame; 4. Control component; 40. Miniature electric telescopic rod; 41. Button battery; 42. Speed ​​detection component; 43. Connecting column; 44. Roller; 45. Photoelectric sensor transmitter; 46. Photoelectric sensor receiver; 47. Controller; 5. Fixing frame; 6. Interlayer spacing detection component; 60. Guide block; 61. Guide hole; 62. Air supply pipe; 63. Air chamber; 64. Exhaust port; 65. Metal hose; 66. Nozzle; 67. Back pressure detection component; 68. Adjustment component; 69. Drum; 610. Detection rod; 611. Sliding rheostat; 612. Return spring; 613. Adjustment groove; 614. Piston plate; 615. Control component; 616. Transmission rod; 617. Iron sheet; 618. Electromagnet; 619. Compression spring. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1 Please see Figures 1 to 7 This invention provides a technical solution: a cutting device for electromechanical installation accessories, including a power supply unit 1 and a cutting head 2; it also includes a holding frame 3 located outside the cutting head 2; a control component 4 located between the holding frame 3 and the cutting head 2, which adjusts the moving speed of the cutting head 2 when the operator moves the holding frame 3 faster; a fixing frame 5 fixed to the output end of the cutting head 2; and an interlayer spacing detection component 6 connected to the fixing frame 5. During the cutting process of the cutting head 2 cutting multiple layers of thin steel plates, the interlayer spacing detection component 6 sprays auxiliary gas onto the cutting seam of the steel plate surface at the cutting point, detects the interlayer spacing of the multiple layers of thin steel plates according to the back pressure of the airflow during spraying, and controls the spray intensity according to the detection results.

[0023] The power supply unit 1 has a built-in power supply and air pump, which provides power to the cutting head 2 and delivers high-speed gas. In use, the operator connects the wire of the cutting head 2 to the power supply unit 1. The interlayer spacing detection component 6 is also connected to the air pump in the power supply unit 1 through the wire of the cutting head 2, so that the air pump will also supply air to the interlayer spacing detection component 6 in a synchronous manner. By moving the holding frame 3, the output end of the cutting head 2 is moved to the position to be cut on the multi-layer thin steel plate. The switch on the surface of the cutting head 2 is turned on, the power supply unit 1 supplies power to the cutting head 2, the plasma nozzle generates a high-temperature plasma arc, and the operator pushes the holding frame 3 to move the cutting head 2 along the cutting line to start the cutting operation.

[0024] When the cutting head 2 moves, the interlayer spacing detection component 6 sprays auxiliary gas into the cut gap, which takes into account the cleaning of residue after cutting, and uses the back pressure of the airflow during the jet to detect the interlayer spacing of the multi-layer thin steel plate. The relationship between the interlayer spacing and the back pressure of the airflow is: the larger the interlayer spacing, the smaller the back pressure; the smaller the interlayer spacing, the larger the back pressure.

[0025] If the interlayer spacing is large, the back pressure when the airflow is ejected is small. At this time, the cutting head 2 is prone to producing slag when cutting. The interlayer spacing detection component 6 will automatically increase the airflow intensity and enhance the cleaning effect of the slag. If the interlayer spacing is small, the back pressure when the airflow is ejected is large, and the cutting effect of the cutting head 2 is stable.

[0026] When detecting the interlayer spacing of multi-layer thin steel plates, the interlayer spacing detection component 6 will provide feedback to the control component 4 on the optimal cutting speed range of the cutting head 2 based on the interlayer spacing. When the control component 4 detects that the cutting speed of the cutting head 2 is not within this cutting speed range, the control component 4 controls the relative movement of the cutting head 2 and the holding frame 3 to compensate for the speed difference, thereby controlling the cutting speed of the cutting head 2 to match the cutting speed of the current interlayer spacing. This avoids the cutting trajectory from breaking due to the holding frame 3 moving too fast, or from local overheating and burning due to the holding frame 3 moving too slowly, thus improving the continuity and accuracy of cutting.

[0027] The control component 4 includes a miniature electric telescopic rod 40 fixedly connected to the holding frame 3. It adopts the TiMOTION JP3 type. A button battery 41 is fixedly connected to the outside of the miniature electric telescopic rod 40. The button battery 41 is a lithium manganese button battery 41. The button battery 41 powers the miniature electric telescopic rod 40. The output end of the miniature electric telescopic rod 40 is fixed to the cutting head 2. A speed detection element 42 for detecting the moving speed of the cutting head 2 is provided on the outside of the fixing frame 5.

[0028] The fixed end of the mini electric telescopic rod 40 is welded to the inner wall of the holding frame 3, and the telescopic end is connected to the outer wall of the cutting head 2 through a polyurethane elastic coupling to avoid vibration transmission. When in use, the operator holds the outside of the holding frame 3, and the holding frame 3 drives the cutting head 2 to move synchronously through the mini electric telescopic rod 40. The cutting head 2 moves backward along the surface of the multi-layer thin steel plate to cut. When the speed detection device 42 detects that the moving speed of the cutting head 2 is lower than the optimal cutting speed range of this interlayer interval, the speed detection device 42 controls the mini electric telescopic rod 40 to retract. When the moving speed detection device 42 detects that the moving speed of the cutting head 2 is higher than the optimal cutting speed range for this interlayer interval, the moving speed detection device 42 controls the miniature electric telescopic rod 40 to extend, thereby compensating for the moving speed of the cutting head 2. When the operator observes the miniature electric telescopic rod 40 retracting, it indicates that the cutting head 2's movement speed on the thin steel plate surface is below the optimal cutting speed range for this interlayer interval. The operator can actively increase the movement speed of the holding frame 3, so that the miniature electric telescopic rod 40 does not need to compensate for the speed difference for a long time. Furthermore, since the stroke of the miniature electric telescopic rod 40 is limited, the operator can control the adjustment speed to increase when adjusting the movement speed of the holding frame 3 until the miniature electric telescopic rod 40 extends. At this point, the movement speed detection device 42 detects that the operator's movement speed of the holding frame 3 is greater than the optimal cutting speed range for this interlayer interval. The miniature electric telescopic rod 40 needs to extend to readjust the movement speed of the cutting head 2 on the thin steel plate surface. When the operator observes the extension of the miniature electric telescopic rod 40, the operator can slow down the movement speed of the holding frame 3 to restore the distance between the roller 44 and the holding frame 3, avoiding insufficient stroke of the miniature electric telescopic rod 40 due to prolonged work. The operator maintains the movement speed of the cutting head 2 on the thin steel plate surface within the optimal cutting speed range for this interlayer interval by observing the retraction and extension of the miniature electric telescopic rod 40. Similarly, when the mini electric telescopic rod 40 extends, it indicates that the moving speed of the cutting head 2 on the surface of the thin steel plate is higher than the optimal cutting speed range for this interlayer interval. When the operator reduces the moving speed of the holding frame 3, the distance between the roller 44 and the holding frame 3 should also be restored.

[0029] The speed detection component 42 includes a connecting column 43 fixedly connected to the side of the fixed frame 5 away from the cutting head 2. A roller 44 is rotatably connected to the outside of the connecting column 43. A photoelectric sensor transmitter 45 is installed on the inner wall of the connecting column 43. A photoelectric sensor receiver 46 is installed on the outside of the roller 44. A controller 47 is installed on the outside of the connecting column 43. The controller 47 is connected to the photoelectric sensor receiver 46 and the miniature electric telescopic rod 40, respectively.

[0030] The photoelectric sensor transmitter 45 is matched with the photoelectric sensor receiver 46, and the model can be E3Z-LS61. The controller 47 is a mature existing technology on the market, and the model can be STM32F103C8T6, a 32-bit MCU with a processing speed of 72MHz and a built-in 12-bit ADC module.

[0031] In use, the roller 44 rests against the surface of the thin steel plate to be cut. When the cutting head 2 moves, the cutting head 2 drives the connecting column 43 to move through the fixing frame 5. Since the connecting column 43 is rotatably connected to the roller 44, the roller 44 will roll on the surface of the thin steel plate when the connecting column 43 moves. When the thin steel plate rolls, it drives the photoelectric sensor receiver 46 to rotate around the center of the roller 44. Thus, every time the roller 44 rotates, the photoelectric sensor receiver 46 will receive a laser emitted by the photoelectric sensor transmitter 45. The photoelectric sensor receiver 46 sends the received frequency signal to the controller 47. The controller 47 determines the moving speed of the cutting head 2 based on the received frequency. When the moving speed converted from the rotation speed of the roller 44 exceeds the threshold, the controller 47 outputs a signal to drive the miniature electric telescopic rod 40 to extend and retract, thereby adjusting the speed of the cutting head 2. The controller 47 compares the actual cutting speed measured by the moving speed detection device 42: if the actual speed is greater than the optimal range (e.g., the holding frame 3 moves too fast), the controller 47 outputs a signal to drive the micro electric telescopic rod 40 to extend, pushing the cutting head 2 forward relative to the holding frame 3 to compensate for the speed difference and avoid the cutting trajectory from breaking; if the actual speed is less than the optimal range (e.g., the holding frame 3 moves too slowly), the telescopic rod shortens, pulling the cutting head 2 backward to reduce the local dwell time and avoid the steel plate from overheating and burning.

[0032] The interlayer spacing detection component 6 includes a guide block 60, which is fixed to a mounting bracket 5. A guide hole 61 is provided on the inner wall of the mounting bracket 5. An air supply pipe 62 is installed on the outer side of the mounting bracket 5. One end of the air supply pipe 62 is connected to the power supply unit 1, and the other end of the air supply pipe 62 is connected to the guide hole 61. An air chamber 63 is provided on the inner wall of the guide block 60. An exhaust hole 64 is connected to the outer side of the air chamber 63. The inner diameter of the exhaust hole 64 is smaller than the inner diameter of the guide hole 61. A metal hose 65 is fixedly connected to the outer side of the guide block 60. The metal hose 65 is a stainless steel corrugated pipe that can be bent 360°. The metal hose 65 is connected to the exhaust hole 64. A nozzle 66 is fixedly connected to the end of the metal hose 65 away from the guide block 60. A back pressure detection element 67 for detecting the back pressure of the airflow is provided on the inner wall of the air chamber 63. An adjustment element 68 for adjusting the flow cross section of the guide hole 61 is provided on the inner wall of the guide hole 61.

[0033] Before use, rotate the nozzle 66 to face the cutting position of the cutting head 2. The air supply pipe 62 in the interlayer spacing detection component 6 is connected to the air pump in the power unit 1 through the wire of the cutting head 2. When the cutting head 2 is started, the air pump supplies high-speed airflow to the cutting head 2 and also supplies air to the air supply pipe 62. The air supply pipe 62 sends the high-speed airflow into the guide hole 61 in the fixing frame 5. The airflow in the guide hole 61 passes through the air chamber 63, exhaust hole 64, and metal hose 65 and is finally ejected from the nozzle 66. The back pressure detection component 67 detects the back pressure of the airflow at the cutting seam of the cutting head 2. The principle is: when the cutting head 2 completes the cutting of multiple layers of thin steel plates, the high-pressure gas ejected from the nozzle 66 is sprayed towards If the interlayer spacing is large, the airflow can easily pass through the gap, resulting in low resistance and low "residual pressure" (i.e., back pressure) in the air cavity 63. If the interlayer spacing is small, the airflow is blocked by the steel plate interlayer, resulting in high resistance and high back pressure in the air cavity 63. The function of the back pressure detection component 67 is to accurately capture the back pressure changes in the air cavity 63 and convert them into identifiable signals, providing a basis for subsequent airflow intensity adjustment and cutting speed adaptation. The adjustment component 68 adjusts the flow area of ​​the guide hole 61 according to the back pressure. That is, when the back pressure decreases, it indicates that the interlayer spacing is large. The adjustment component 68 increases the flow area of ​​the guide hole 61, allowing more airflow to be blown towards the cutting position of the cutting head 2 to help clean up the slag.

[0034] The back pressure detection component 67 includes a diaphragm 69, which is fixed to the inner wall of the air chamber 63. A detection rod 610 is fixedly connected to the outer side of the diaphragm 69. A sliding rheostat 611 is installed on the inner wall of the air chamber 63. The detection rod 610 is connected to the slider of the sliding rheostat 611. A return spring 612 is provided on the outer side of the detection rod 610. One end of the return spring 612 is fixed to the diaphragm 69, and the other end of the return spring 612 is fixed to the housing of the sliding rheostat 611.

[0035] When the back pressure detection component 67 is working, the airflow enters the air chamber 63 through the guide hole 61. After the high-pressure airflow enters the air chamber 63 through the guide hole 61, part of the airflow is ejected from the nozzle 66 through the exhaust hole 64 and the metal hose 65. The other part of the airflow is "stuck" in the air chamber 63 due to the resistance of the cutting slit at the end of the nozzle 66, forming a stable back pressure. When the back pressure increases (such as when the interlayer spacing is small), the pressure in the air chamber 63 pushes the diaphragm 69 to bulge outward. The deformation amplitude is positively correlated with the back pressure. When the back pressure decreases (such as when the interlayer spacing is large), the pressure in the air chamber 63 decreases, and the diaphragm 69 is concave inward under the pulling force of the return spring 612, returning to a position close to the initial position.

[0036] When the tympanic membrane 69 protrudes, it drives the detection rod 610 to move outward synchronously; when the tympanic membrane 69 is concave, the detection rod 610 retracts inward with the tympanic membrane 69. The slider of the sliding rheostat 611 (model WX112, resistance range 1k-10kΩ) at the end of the detection rod 610 away from the tympanic membrane 69 is fixedly connected. The slider can slide along the resistance wire of the rheostat. When the detection rod 610 moves, the slider moves accordingly, changing the resistance value of the sliding rheostat 611 connected to the circuit.

[0037] High back pressure -- large bulge of tympanic membrane 69 -- large outward movement of detection rod 610 -- slider moves towards the "high resistance end" of resistance wire -- increased resistance of sliding rheostat 611. Low back pressure -- large tympanic membrane 69 depression -- large inward retraction distance of detection rod 610 -- slider moves towards the "low resistance end" of resistance wire -- resistance of sliding rheostat 611 decreases.

[0038] The change in back pressure is thus converted into a linear resistance signal. The controller 47 converts the resistance signal into interlayer spacing data to further match the optimal cutting speed range. For example, when the spacing is >0.5mm, the optimal speed is 3-5cm / s, and when the spacing is ≤0.5mm, the optimal speed is 5-8cm / s. Then, the speed of the cutting head 2 is adjusted by the control component 4 to avoid trajectory breakage or overheating and burning.

[0039] The adjusting component 68 includes an adjusting groove 613 opened on the inner wall of the fixed frame 5. The adjusting groove 613 is U-shaped and divides the guide hole 61 into two parts. The adjusting groove 613 is connected to the guide hole 61. A piston plate 614 is slidably connected to the inner wall of the adjusting groove 613. The piston plate 614 blocks the guide hole 61. A control component 615 is provided on the outer side of the piston plate 614 to drive the piston plate 614 to move when the resistance of the sliding rheostat 611 changes.

[0040] By blocking part of the guide hole 61 by the piston plate 614, the airflow enters the regulating groove 613 through the guide hole 61. When the back pressure decreases, the control component 615 drives the piston plate 614 to move, so that the piston plate 614 reduces the blocking area of ​​the guide hole 61, thereby increasing the gas flow rate into the air chamber 63.

[0041] The control component 615 includes a transmission rod 616 fixedly connected to the piston plate 614. The transmission rod 616 is slidably connected to the inner wall of the fixed frame 5. An iron plate 617 is fixedly connected to the end of the transmission rod 616 away from the piston plate 614. The iron plate 617 is slidably connected to the inner wall of the fixed frame 5. An electromagnet 618 is provided on the outside of the iron plate 617. The electromagnet 618 is installed on the inner wall of the fixed frame 5 and is connected in series with a sliding rheostat 611. A compression spring 619 is provided on the outside of the transmission rod 616. One end of the compression spring 619 is fixed to the piston plate 614, and the other end of the compression spring 619 is fixed to the inner wall of the adjusting groove 613.

[0042] When the resistance of the sliding rheostat 611 decreases, the current intensity in the circuit formed by the electromagnet 618 and the sliding rheostat 611 increases, thereby increasing the magnetic field strength generated by the electromagnet 618. The increased magnetic field strength of the electromagnet 618 increases the attraction of the electromagnet 618 to the iron plate 617, causing the iron plate 617 to move closer to the electromagnet 618. The iron plate 617 drives the transmission rod 616 to move, and the transmission rod 616 pulls the piston plate 614. When the piston plate 614 moves, it compresses the compression spring 619. The compression spring 619, which is in a compressed state, stores potential energy. When the magnetic field strength of the electromagnet 618 decreases, the compression spring 619, which is in a compressed state, pushes the piston plate 614 to reset.

[0043] Example 2 Please see Figure 8 In this second embodiment, the other structures remain unchanged. The difference from the first embodiment is that multiple photoelectric sensor receivers 46 are provided, and the multiple photoelectric sensor receivers 46 are distributed at equal intervals. When a single photoelectric sensor receiver 46 is working, the speed detection depends on the roller 44 rotating once. However, the multiple photoelectric sensor receivers 46 are distributed at equal intervals, which is equivalent to setting "multiple monitoring points" on the circumference of the roller 44, increasing the sampling frequency, ensuring more accurate speed control during low-speed cutting, and avoiding burning of thin steel plates.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cutting device for electromechanical installation accessories, comprising: Power supply unit and cutting head; Its characteristic is that it further includes a holding frame, which is located outside the cutting head; A control component is located between the holding frame and the cutting head. When the operator moves the holding frame faster, the control component reduces the moving speed of the cutting head; when the operator moves the holding frame slower, the control component increases the moving speed of the cutting head. The fixing frame is fixed to the output end of the cutting head; Interlayer spacing detection component, which is connected to the fixed frame, sprays auxiliary gas onto the cutting seam of the steel plate surface at the cutting point during the cutting process of the cutting head, and detects the interlayer spacing of the multi-layer thin steel plate according to the back pressure of the airflow during the spraying, and controls the spraying intensity according to the detection results; Based on the interlayer spacing detected by the interlayer spacing detection component, the control component adjusts the moving speed of the cutting head to match the moving speed of the current interlayer spacing.

2. The electromechanical installation accessory cutting device according to claim 1, characterized in that: The control component includes a miniature electric telescopic rod fixedly connected to the holding frame. A button battery is fixedly connected to the outside of the miniature electric telescopic rod. The output end of the miniature electric telescopic rod is fixed to the cutting head. A speed detection device for detecting the moving speed of the cutting head is provided on the outside of the fixed frame.

3. The electromechanical installation accessory cutting device according to claim 2, characterized in that: The speed detection component includes a connecting column fixedly connected to the side of the fixed frame away from the cutting head. A roller is rotatably connected to the outside of the connecting column. A photoelectric sensor transmitter is installed on the inner wall of the connecting column. A photoelectric sensor receiver is installed on the outside of the roller. A controller is installed on the outside of the connecting column. The controller is connected to the photoelectric sensor receiver and the miniature electric telescopic rod.

4. The electromechanical installation accessory cutting device according to claim 1, characterized in that: The interlayer spacing detection component includes a guide block, which is fixed to a mounting frame. The inner wall of the mounting frame has a guide hole, and an air supply pipe is installed on the outer side of the mounting frame. One end of the air supply pipe is connected to a power supply unit, and the other end of the air supply pipe is connected to the guide hole. An air chamber is formed in the inner wall of the guide block, and an exhaust hole is connected to the outer side of the air chamber. A flexible metal tube is fixedly connected to the outer side of the guide block and is connected to the exhaust hole. A nozzle is fixedly connected to the end of the flexible metal tube away from the guide block. A back pressure detection element for detecting the back pressure of the airflow is provided in the inner wall of the air chamber, and an adjustment element for adjusting the flow cross-section of the guide hole is provided in the inner wall of the guide hole.

5. The electromechanical installation accessory cutting device according to claim 4, characterized in that: The back pressure detection device includes a diaphragm, which is fixed to the inner wall of the air cavity. A detection rod is fixedly connected to the outer side of the diaphragm. A sliding rheostat is installed on the inner wall of the air cavity. The detection rod is connected to the slider of the sliding rheostat. A return spring is provided on the outer side of the detection rod. One end of the return spring is fixed to the diaphragm, and the other end of the return spring is fixed to the housing of the sliding rheostat.

6. The electromechanical installation accessory cutting device according to claim 5, characterized in that: The inner diameter of the exhaust port is smaller than that of the guide port.

7. The electromechanical installation accessory cutting device according to claim 5, characterized in that: The adjusting component includes an adjusting groove opened in the inner wall of the fixed frame, the adjusting groove communicating with the guide hole, a piston plate slidably connected to the inner wall of the adjusting groove, the piston plate blocking the guide hole, and a control component on the outside of the piston plate that drives the piston plate to move when the resistance value of the sliding rheostat changes.

8. The electromechanical installation accessory cutting device according to claim 7, characterized in that: The control component includes a transmission rod fixedly connected to a piston plate, the transmission rod being slidably connected to the inner wall of a fixed frame, an iron plate being fixedly connected to the end of the transmission rod away from the piston plate, the iron plate being slidably connected to the inner wall of the fixed frame, an electromagnet being provided on the outer side of the iron plate, the electromagnet being installed on the inner wall of the fixed frame, and the electromagnet being connected to a sliding rheostat.

9. The electromechanical installation accessory cutting device according to claim 8, characterized in that: A compression spring is provided on the outside of the transmission rod. One end of the compression spring is fixed to the piston plate, and the other end of the compression spring is fixed to the inner wall of the adjustment groove.

10. The electromechanical installation accessory cutting device according to claim 7, characterized in that: The adjustment groove is U-shaped and divides the guide hole into two parts.

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