Positive pressure numerical control operation panel for numerical control machine tool

Abstract

The utility model provides a positive pressure numerical control operation panel for a numerical control machine tool, which belongs to the technical field of explosion prevention and comprises a positive pressure cabinet mounted on the inner surface of a glass door of the machine tool, the positive pressure cabinet comprises a door plate, and a numerical control panel is positioned on the inner surface of the door plate; the air channel control box is provided with an air supply pipe, the end of the air supply pipe is connected with the positive pressure cabinet, the air supply pipe is further provided with a manual ball valve used for controlling on-off of an air channel, the air supply pipe is further provided with a pressure reduction filter valve, and the pressure reduction filter valve is located between the manual ball valve and the positive pressure cabinet and used for stabilizing air pressure in the air supply pipe; the exhaust pipe is arranged on the outer side wall of the positive pressure cabinet and communicated with the interior of the positive pressure cabinet, a pressure release valve is arranged on the exhaust pipe, and the pressure release valve is used for releasing gas in the positive pressure cabinet to stabilize the gas pressure in the positive pressure cabinet; the explosion-proof electrical box is fixed below the gas circuit control box; according to the utility model, airflow can be continuously input into the positive pressure cabinet, so that the possibility of explosion caused by electric sparks in the positive pressure cabinet is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of explosion -proof equipment, concretely relates to a positive pressure numerical control operation panel for numerical control machine tool. BACKGROUND

[0002] Machine tool as the cornerstone of modern industry, plays an irreplaceable role in manufacturing. It is the important tool of raw material transformation into high precision, high quality parts, has the vital significance to promote industrial development, improve production efficiency and guarantee product quality.

[0003] But when machine tool equipment is applied to the field such as military manufacturing, especially turning solid gunpowder, explosive and other explosion dangerous place, machine tool distribution cabinet, machine tool control cabinet and motor, detection switch and other components installed on machine tool may produce electric arc spark because of failure, affect production safety.

[0004] If the possibility of explosion in the process of processing materials can be reduced, the production efficiency can be greatly improved, the failure rate can be reduced, and the safety can be improved. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a positive pressure numerical control operation panel for numerical control machine tool, the utility model can continuously input airflow to the positive pressure cabinet, thereby reducing the possibility of explosion in the positive pressure cabinet due to electric spark.

[0006] To solve the above technical problem, the utility model provides a positive pressure numerical control operation panel for numerical control machine tool, comprising;

[0007] The positive pressure cabinet is installed on the inner surface of the machine tool glass door, and the positive pressure cabinet comprises a door plate, the door plate can be flipped on the positive pressure cabinet, the numerical control panel is located on the inner surface of the door plate, and the numerical control panel is located in the positive pressure cabinet when the door plate is closed, and the machining parts in the machine tool can be controlled through the numerical control panel;

[0008] The gas path control box is provided with a gas supply pipe, the gas path control box can provide a gas source for the gas supply pipe, the end of the gas supply pipe is connected with the positive pressure cabinet, the airflow can be sent into the positive pressure cabinet through the gas supply pipe, and the gas supply pipe is further provided with a manual ball valve for controlling the on-off of the control gas path, and the gas supply pipe is further provided with a pressure reducing filter valve, the pressure reducing filter valve is located between the manual ball valve and the positive pressure cabinet and is used for stabilizing the gas pressure in the gas supply pipe, so that the airflow can be prevented from suddenly entering the positive pressure cabinet;

[0009] The exhaust pipe is arranged on the outer wall of the positive pressure cabinet and is connected with the inside of the positive pressure cabinet, the airflow in the positive pressure cabinet can be discharged through the exhaust pipe, the exhaust pipe is provided with a pressure relief valve, the pressure relief valve is used for releasing the gas in the positive pressure cabinet to stabilize the gas pressure in the positive pressure cabinet, and the gas pressure in the positive pressure cabinet can be maintained at a stable value through the pressure relief valve;

[0010] The explosion-proof electrical box is fixed below the gas circuit control box and provides power supply for the gas circuit control box and the positive pressure cabinet.

[0011] The air supply pipe is further provided with an explosion-proof electromagnetic valve for constant air flow of the air supply pipe into the positive pressure chamber.

[0012] The air supply pipe is further connected with a gas supply pipe through a tee pipe, and part of the air flow in the air supply pipe can also enter the gas supply pipe.

[0013] The positive pressure cabinet is further provided with a first differential pressure switch, one end of which is in communication with the inside of the positive pressure chamber, and the other end is in communication with the air outlet of the pressure relief valve.

[0014] The pressure difference between the inside of the positive pressure cabinet and the air outlet of the exhaust pipe.

[0015] The positive pressure cabinet is further provided with a second differential pressure switch, one end of which is in communication with the inside of the positive pressure cabinet, and the other end is in communication with the atmospheric environment outside the cabinet.

[0016] The positive pressure cabinet is further provided with a third differential pressure switch, one end of which is in communication with the inside of the positive pressure chamber, and the other end is in communication with the atmospheric environment outside the cabinet.

[0017] The positive pressure cabinet is further provided with a pressure gauge for digital display of the air pressure inside the positive pressure cabinet.

[0018] The end of the exhaust pipe is further provided with a fire barrier, which can prevent the leakage of electric spark particles in the positive pressure cabinet to the outside through the exhaust pipe.

[0019] Compared with the prior art, the present application has at least one of the following beneficial technical effects:

[0020] 1. Improve safety: by continuously inputting airflow into the positive pressure cabinet, the utility model effectively reduces the possibility of explosion caused by electric sparks and other reasons in the positive pressure cabinet. The input airflow is inert gas, so that the accumulation and ignition of electric sparks in the positive pressure cabinet can be prevented due to the inert gas filled in the positive pressure cabinet, thereby greatly improving the safety of the machine tool used in explosion hazard places.

[0021] 2. Stable pressure control: the cooperation of the pressure reducing filter valve, the explosion-proof electromagnetic valve and the pressure regulating valve enables the airflow sent into the positive pressure cabinet to be accurately controlled, preventing sudden changes in air pressure. At the same time, the setting of the first differential pressure switch, the second differential pressure switch and the third differential pressure switch further ensures the stability of the internal air pressure of the positive pressure cabinet, avoiding potential safety hazards due to air pressure fluctuations.

[0022] 3. Intelligent monitoring and adjustment: the internal air pressure of the positive pressure cabinet is displayed by the pressure gauge, so that the operator can intuitively understand the air pressure condition and adjust it in time. In addition, the second differential pressure switch and the third differential pressure switch can automatically adjust the opening of the pressure regulating valve according to the difference between the internal air pressure of the positive pressure cabinet and the ambient air pressure, thereby realizing intelligent air pressure monitoring and adjustment.

[0023] 4. Superior explosion-proof performance: the explosion-proof electrical box provides power for the gas path control box and the positive pressure cabinet, ensuring the explosion-proof performance of the entire system. At the same time, the design of the flame arrestor at the end of the exhaust pipe effectively prevents the leakage of electric spark particles in the positive pressure cabinet to the outside through the exhaust pipe, further enhancing the safety of the system.

[0024] 5. Convenient operation: the setting of the manual ball valve enables the operator to conveniently control the on-off of the gas path, facilitating the maintenance and repair of the system. The numerical control panel provides a convenient way to control the workpiece in the machine tool, improving the operation efficiency of the machine tool. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structure schematic view of the utility model positive pressure numerical control operation panel for numerical control machine tool;

[0026] Figure 2 It is a structure schematic view of the utility model sorting bin sectional view;

[0027] Figure 3 It is a structure schematic view of the utility model connecting mechanism;

[0028] Figure 4 It is a structure schematic view of the utility model aggregate tank.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 101, positive pressure cabinet; 102, numerical control panel; 103, pressure gauge;

[0031] 200, gas circuit control box; 201, gas supply pipe; 202, manual ball valve; 203, pressure reducing filter valve; 204, explosion-proof solenoid valve;

[0032] 300, exhaust pipe; 301, pressure relief valve; 302, flame arrestor;

[0033] 400, explosion-proof electrical box;

[0034] 500, gas supply pipe; 501, pressure regulating valve;

[0035] 600, first differential pressure switch; 601, second differential pressure switch; 602, third differential pressure switch. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model more clear, the following will combine the drawings of the embodiments of the utility model to make the specific description. Figures 1-4 The technical scheme of the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all. Based on the described embodiments of the utility model, all other embodiments obtained by those skilled in the art belong to the scope of protection of the utility model.

[0037] A positive pressure numerical control operation panel for numerical control machine tool, as shown in Figure 1 , 2 , 3: it includes the positive pressure cabinet 101 arranged on the inner surface of the machine tool glass door, the positive pressure cabinet 101 includes a rotatably arranged door plate, the inner surface of the door plate is provided with a numerical control panel 102, the numerical control panel 102 can control the operation shaft of the machine tool to feed and work, and when the machine tool is machining the workpiece, the glass door is in the closed state, at this time, the positive pressure cabinet 101 is located in the internal space of the machine tool, and the glass door can be opened temporarily, the numerical control panel 102 is quickly operated to the operation shaft of the machine tool, and the glass door is closed to make the machine tool work normally.

[0038] Corresponding to the positive pressure cabinet 101, there are also gas circuit control box 200 and explosion-proof electrical box 400, the gas circuit control box 200 is fixed above the gas circuit control box 200, the positive pressure cabinet 101 is internally provided with various control devices and electrical lines, and the electrical lines occasionally produce electric sparks when the machine tool is running, the gas circuit control box 200 can be used to input inert gas into the positive pressure cabinet 101, the positive pressure cabinet 101 is filled with inert gas, so that there is no flammable gas in the positive pressure cabinet 101, so that the electric spark in the positive pressure cabinet 101 will not explode, and the explosion-proof electrical box can also provide power for the gas circuit control box 200 and the positive pressure cabinet 101, and the explosion-proof electrical box and the gas circuit control box 200 are placed outside the machine case.

[0039] Specifically, the gas control box 200 is equipped with an air supply pipe 201, such as Figure 3 As shown: The end of the air supply pipe 201 is connected to the positive pressure cabinet 101. The air circuit control box 200 can input air source into the air supply pipe 201, and the airflow can enter the positive pressure cabinet 101 through the air supply pipe 201. Correspondingly, the air supply pipe 201 is also provided with an exhaust pipe 300 on the positive pressure cabinet 101, and the gas in the positive pressure cabinet 101 can be discharged through the exhaust pipe 300. This can prevent the air supply pipe 201 from continuously inputting gas into the positive pressure cabinet 101, so that the positive pressure cabinet 101 will not be affected by excessive air pressure.

[0040] Furthermore, the air supply pipe 201 is also equipped with a manual ball valve 202, which is used to control the opening and closing of the air passage in the air supply pipe 201. The air supply pipe 201 is also equipped with a pressure reducing filter valve 203, which can reduce the airflow velocity in the air supply pipe 201, thereby stabilizing the airflow and preventing the airflow from bursting into the positive pressure cabinet 101. The exhaust pipe 300 is also equipped with a pressure relief valve 301, which is used to release the gas inside the positive pressure cabinet 101 to stabilize the internal air pressure of the positive pressure cabinet 101, so that the air pressure inside the positive pressure cabinet 101 can always be kept at a stable value.

[0041] Furthermore, the gas supply pipe 201 is also equipped with an explosion-proof solenoid valve 204. The explosion-proof solenoid valve 204 is located between the pressure reducing filter valve 203 and the positive pressure cabinet 101. The explosion-proof solenoid valve 204 is used to constantly supply the airflow into the positive pressure chamber through the gas supply pipe 201. That is, the airflow passing through the explosion-proof solenoid valve 204 will be input into the positive pressure cabinet 101 at a fixed flow rate. In addition, the gas supply pipe 201 is also connected to the gas delivery pipe 500 through a three-way pipe. The three-way pipe is located between the pressure reducing filter valve 203 and the explosion-proof solenoid valve 204. The end of the gas delivery pipe 500 is connected to the positive pressure cabinet 101. Some of the gas passing through the pressure reducing filter valve 203 in the gas supply pipe 201 will be input into the positive pressure cabinet 101 through the gas delivery pipe 500. The gas delivery pipe 500 is also equipped with a pressure regulating valve 501. The pressure regulating valve 501 can enhance or reduce the airflow entering the positive pressure cabinet 101 through the gas delivery pipe 500.

[0042] It is worth mentioning that the exhaust pipe 300 is also equipped with a flame arrestor 302 at the end. The flame arrestor 302 can prevent the electric sparks in the positive pressure cabinet 101 from being discharged to the external environment with the airflow, thus further enhancing the safety of the machine tool during operation.

[0043] Meanwhile, the positive pressure cabinet 101 is also equipped with a pressure gauge 103, which is used to digitally display the air pressure inside the positive pressure cabinet 101. In other words, the pressure gauge 103 allows the staff to directly understand the air pressure inside the positive pressure cabinet 101.

[0044] Further, the positive pressure cabinet 101 is also provided with a first differential pressure switch 600, one end of the first differential pressure switch 600 is communicated to the inside of the positive pressure cabinet 101, and the other end is connected between the pressure relief valve 301 and the fire barrier 302 on the exhaust pipe 300, that is, the pressure difference between the airflow in the positive pressure cabinet 101 and the exhaust port of the pressure relief valve 301 can be measured through the first differential pressure switch 600.

[0045] Specifically, the exhaust pipe 300 is also provided with a throttling element, which is located at the exhaust port of the pressure relief valve 301, and is calculated by using Bernoulli's theorem, as shown in the formula: Figure 4 As shown: When the airflow passes through the throttling element, a pressure difference (△P) is generated, and the flow rate is proportional to the square root of the pressure difference.

[0046] That is, the volume flow rate:

[0047] In the formula:

[0048] A: constant;

[0049] C: discharge coefficient;

[0050] β: diameter ratio (d / D);

[0051] D: throttling element aperture (mm);

[0052] ε: expandability coefficient;

[0053] △P: pressure difference before and after the throttling element (Pa);

[0054] ρ: fluid density under working conditions (kg / m3);

[0055] From the above theory, as long as the pressure on both sides of the throttling element is measured, the fluid flow rate of the horizontal pipeline can be obtained. The model of the first differential pressure switch 600 is 930.80 (20-300Pa). When the air pressure difference on both sides of the throttling element exceeds the preset threshold value, it means that the airflow in the positive pressure cabinet 101 is insufficient, and then the alarm will be controlled to issue an alarm, thereby realizing the flow rate measurement of the positive pressure cabinet 101.

[0056] Further, the positive pressure cabinet 101 is also provided with a second differential pressure switch 601, one end of the second differential pressure switch 601 is communicated with the inside of the positive pressure cabinet 101, and the other end is communicated with the atmosphere outside the cabinet, that is, when the second differential pressure switch 601 detects that the air pressure in the positive pressure cabinet 101 is lower than the preset threshold value, the second differential pressure switch 601 will send a signal to the controller, and then the controller will control the pressure regulating valve 501 to enhance the airflow of the gas inlet pipe 500 into the positive pressure cabinet 101 to stabilize the pressure difference ratio between the internal air pressure of the positive pressure cabinet 101 and the external environment air pressure.

[0057] Further, the third pressure difference switch 602 is arranged on the positive pressure cabinet 101, one end of the third pressure difference switch 602 is communicated with the inside of the positive pressure chamber, and the other end is communicated with the atmosphere outside the cabinet, that is, when the third pressure difference switch 602 detects that the air pressure in the positive pressure cabinet 101 is higher than the preset threshold value, the third pressure difference switch 602 will send a signal to the controller, and then the controller will control the pressure regulating valve 501 to reduce the air flow of the air inlet pipe 500 into the positive pressure cabinet 101 to stabilize the pressure difference ratio of the internal air pressure of the positive pressure cabinet 101 and the external environment air pressure.

[0058] The second pressure difference switch 601 and the third pressure difference switch 602 can be model 930.80 (20-300Pa).

[0059] Further, the exhaust pipe 300 and the pressure relief valve 301 can be replaced by an exhaust device, that is, the publication number 202323267677.5, the fire barrier 302 and the throttling member are arranged at the air outlet of the exhaust device, and the end of the first pressure difference switch 600 is also fixed at the air outlet of the exhaust device, so that the exhaust of the positive pressure cabinet 101 and the calculation of the air flow difference between the internal air flow of the positive pressure cabinet 101 and the air flow of the air outlet of the exhaust device can be achieved.

[0060] In addition, it should be noted that in the description of the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0061] The above is the preferred embodiment of the present application, it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A positive pressure numerical control operation panel for a numerical control machine tool, characterized by: Comprise; The positive pressure cabinet (101) is installed on the inner surface of the machine tool glass door, and the positive pressure cabinet (101) comprises a door plate, and a numerical control panel (102) is located on the inner surface of the door plate. The machining workpiece in the machine tool can be controlled through the numerical control panel (102); The gas path control box (200) is provided with a gas supply pipe (201), and the gas path control box (200) can provide a gas source for the gas supply pipe (201). The end of the gas supply pipe (201) is connected with the positive pressure cabinet (101), and a manual ball valve (202) for controlling the on-off of the control gas path is further arranged on the gas supply pipe (201); The exhaust pipe (300) is arranged on the outer wall of the positive pressure cabinet (101) and is connected with the inside of the positive pressure cabinet (101). The exhaust pipe (300) is provided with a pressure relief valve (301), and the pressure relief valve (301) is used to release the gas in the positive pressure cabinet (101) to stabilize the internal pressure of the positive pressure cabinet (101). The explosion-proof electrical box (400) is fixed below the gas path control box (200) and provides power for the gas path control box (200) and the positive pressure cabinet (101).

2. A positive pressure numerical control operation panel for a numerical control machine tool as set forth in claim 1, characterized by: The gas supply pipe (201) is further provided with a pressure reducing filter valve (203), and the pressure reducing filter valve (203) is located between the manual ball valve (202) and the positive pressure cabinet (101) and is used to stabilize the gas pressure in the gas supply pipe (201).

3. A positive pressure numerical control operation panel for a numerical control machine tool as set forth in claim 2, characterized by: The gas supply pipe (201) is further provided with an explosion-proof electromagnetic valve (204) for constant delivery of the gas flow in the gas supply pipe (201) into the positive pressure chamber. The explosion-proof electromagnetic valve (204) is located between the pressure reducing filter valve (203) and the positive pressure cabinet (101).

4. A positive pressure numerical control operation panel for a numerical control machine tool as set forth in claim 3, characterized by: The gas supply pipe (201) is further connected with a gas supply pipe (500) through a three-way pipe. The three-way pipe is located between the pressure reducing filter valve (203) and the explosion-proof electromagnetic valve (204). The end of the gas supply pipe (500) is connected with the positive pressure cabinet (101). The gas supply pipe (500) is further provided with a pressure regulating valve (501).

5. A positive pressure numerical control operation panel for a numerical control machine tool as set forth in claim 4, characterized by: The positive pressure cabinet (101) is further provided with a first differential pressure switch (600). One end of the first differential pressure switch (600) is connected with the inside of the positive pressure chamber, and the other end is connected with the gas outlet of the pressure relief valve (301). The first differential pressure switch (600) is used to measure the flow difference between the gas flow in the positive pressure cabinet (101) and the gas flow at the gas outlet of the pressure relief valve (301).

6. A positive pressure numerical control operation panel for a numerical control machine tool as set forth in claim 5, characterized by: The positive pressure cabinet (101) is further provided with a second differential pressure switch (601). One end of the second differential pressure switch (601) is connected with the inside of the positive pressure cabinet (101), and the other end is connected with the atmospheric environment outside the machine case. When the second differential pressure switch (601) detects that the gas pressure in the positive pressure cabinet (101) is too low, the pressure regulating valve (501) will increase the gas flow of the gas supply pipe (500) into the positive pressure cabinet (101).

7. A positive pressure numerical control operation panel for a numerical control machine tool as set forth in claim 5, characterized by: The positive pressure cabinet (101) is further provided with a third differential pressure switch (602). One end of the third differential pressure switch (602) is connected with the inside of the positive pressure chamber, and the other end is connected with the atmospheric environment outside the machine case. When the third differential pressure switch (602) detects that the gas pressure in the positive pressure cabinet (101) is too high, the pressure regulating valve (501) will reduce the gas flow of the gas supply pipe (500) into the positive pressure cabinet (101).

8. A positive pressure numerical control operating panel for a numerical control machine tool as claimed in claim 5, characterized in that: The positive pressure cabinet (101) is externally provided with a pressure gauge (103) for digital display of the air pressure inside the positive pressure cabinet (101).

9. A positive pressure numerical control operating panel for a numerical control machine tool as claimed in claim 1, characterized in that: The end of the exhaust pipe (300) is further provided with a fire barrier (302).

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