Photoelectric displacement sensor protection device for welding pipe cutting

Abstract

The utility model discloses a photoelectric displacement sensor protection device for welding pipe cutting. The photoelectric displacement sensor protection device comprises a fixed seat, a protection sleeve and an air pipe joint, the fixed seat is fixed on the laser cutting head and is of a plate-shaped structure, a cavity penetrating through the upper surface and the lower surface is formed in the center of the fixed seat, and a measuring window of the photoelectric displacement sensor is downwards fixed in the cavity; the protective sleeve is fixed at the lower part of the fixed seat, is positioned below the cavity and is used for sealing and protecting a measurement window of the photoelectric displacement sensor; the fixed seat is connected with an air pipe joint to blow air into the inner cavity, so that external water and oil cannot enter and pollute the measuring window. According to the utility model, the photoelectric displacement sensor is not polluted by cooling water and the like during the production of the welded pipe, the cutting distance between the laser cutting head and the welded pipe is stably measured, and the smooth production of the welded pipe is ensured. According to the utility model, the photoelectric displacement sensor cannot be polluted by cooling water and the like during welded pipe production, the service life of the photoelectric displacement sensor is prolonged, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to welded pipe production technical field relates to a protective device especially relates to a kind of protective device for photoelectric displacement sensor when being used in online laser cutting. BACKGROUND

[0002] As a new cutting technology, laser cutting has the advantages of fast cutting speed, high cutting efficiency, good cutting quality and low cutting cost, so it has become one of the main cutting methods. When laser cutting a workpiece, a cutting distance needs to be maintained between the laser cutting head and the workpiece to be cut. The existing sensors for measuring the cutting distance include capacitive sensors and photoelectric displacement sensors.

[0003] In the field of welded pipe production, cooling water is needed to absorb and dissipate heat during the online forming and welding process. Therefore, when the continuously produced welded pipe reaches the cutting process, there will be cooling water inside and on the surface of the welded pipe.

[0004] However, the cooling water during welded pipe production has a great impact on the capacitance value of the capacitive sensor on the laser cutting head, so the capacitive sensor cannot be used to stably measure the cutting distance between the laser cutting head and the welded pipe to be cut.

[0005] When using a photoelectric displacement sensor for measurement, the cutting distance between the laser cutting head and the welded pipe to be cut can be stably measured in most cases, but the cooling water also has a certain pollution probability for the photoelectric displacement sensor (such as the cooling water splashing onto the measurement window surface or entering the interior of the photoelectric displacement sensor, causing inaccurate measurement or internal failure, affecting the sensor detection function).

[0006] In order to stably measure, the photoelectric displacement sensor needs to be protected, and a protective device for the photoelectric displacement sensor is urgently needed. SUMMARY

[0007] To address the impact of cooling water and other factors on the photoelectric displacement sensor during laser cutting, the utility model provides a photoelectric displacement sensor protection device for welded pipe cutting, which ensures that the cooling water does not contaminate the photoelectric displacement sensor during welded pipe production, thereby stably measuring the cutting distance between the laser cutting head and the welded pipe and ensuring the smooth progress of production.

[0008] The technical solution of the utility model is as follows:

[0009] The utility model provides a kind of photoelectric displacement sensor protection device for welded pipe cutting, the photoelectric displacement sensor protection device for welded pipe cutting includes fixed seat, protective sleeve and gas pipe joint;The fixed seat is fixed on laser cutting head, and fixed seat is set as slab structure and is centrally arranged through the cavity of upper and lower surfaces, and the measurement window of photoelectric displacement sensor is fixed in the cavity of fixed seat downwards;The protective sleeve is fixed in the lower part of fixed seat and below cavity, and the measurement window of photoelectric displacement sensor is closed and protected;Gas pipe joint is connected on the fixed seat to blow gas to internal cavity, to ensure that external water, oil cannot enter and pollute the measurement window.

[0010] Further, the protective sleeve is set as hollow conical structure, the bottom surface of hollow conical structure is fixed in the lower part of fixed seat, the top end of hollow conical structure is provided with hole, and the inside of hollow conical structure is provided with conical cavity.

[0011] Further, the protective sleeve is fixed in the lower part of fixed seat and below cavity by screw thread connection.

[0012] Further, the material of the protective sleeve is stainless steel or aluminum alloy.

[0013] Further, the measurement window of photoelectric displacement sensor is downwards fixed on the upper part of fixed seat by pressing sleeve.

[0014] Further, the pressing sleeve is set as annular structure, the inside of pressing sleeve surrounds the bottom shaft of photoelectric displacement sensor, and the outside of pressing sleeve is fixed on the upper part of fixed seat.

[0015] Further, the pressing sleeve is screw-connected with fixed seat.

[0016] Further, the material of the pressing sleeve is steel.

[0017] Further, the fixed seat is fixedly installed on laser cutting head or the mounting seat of laser cutting head by screw.

[0018] Further, the side surface and upper and lower surfaces of the slab structure of fixed seat are provided with screw holes.

[0019] Compared with prior art, the utility model has the following advantages:

[0020] (1) The protective device of photoelectric displacement sensor for welded pipe cutting of the utility model can ensure that photoelectric displacement sensor is not polluted by cooling water during welded pipe production, so as to stably measure the cutting distance between laser cutting head and welded pipe, and ensure the smooth progress of welded pipe production.

[0021] (2) The protection device for the photoelectric displacement sensor for welded pipe cutting of the utility model makes the photoelectric displacement sensor not be polluted by cooling water and the like during welded pipe production, prolongs the service life of the photoelectric displacement sensor and reduces production cost.

[0022] (3) The protection device for the photoelectric displacement sensor for welded pipe cutting of the utility model sets a protective sleeve for the measurement window of the photoelectric displacement sensor on one hand and connects an air inlet pipe through the air pipe joint on the other hand, can blow air to form positive pressure in the internal space of the protective sleeve, ensures that water, oil and the like outside cannot enter the inner cavity to pollute the photoelectric displacement sensor and ensures that the photoelectric displacement sensor is normally and stably used.

[0023] (4) The protective sleeve located at the measurement window of the photoelectric displacement sensor is conical (the taper is as small as possible, which can ensure normal measurement of the photoelectric displacement sensor), which is beneficial to forming positive pressure in the internal space when air is blown inward. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a side view of the protection device for the photoelectric displacement sensor for welded pipe cutting of the utility model;

[0025] Figure 2 It is a sectional view of the protection device for the photoelectric displacement sensor for welded pipe cutting of the utility model;

[0026] Figure 3 It is a perspective view of the protection device for the photoelectric displacement sensor for welded pipe cutting of the utility model;

[0027] Figure 4 It is a schematic view of the protection device for the photoelectric displacement sensor for welded pipe cutting of the utility model fixed on the laser cutting head (the fixing seat is installed on the laser cutting head);

[0028] Figure 5 It is a schematic view of the protection device for the photoelectric displacement sensor for welded pipe cutting of the utility model fixed on the laser cutting head (the fixing seat is installed on the laser cutting head mounting seat);

[0029] Among them, 1 is a fixing seat, 2 is a pressing sleeve, 3 is a protective sleeve, 4 is an air pipe joint, and 5 is a photoelectric displacement sensor. DETAILED DESCRIPTION

[0030] The utility model will be further described below in combination with the drawings and examples.

[0031] Referring to Figures 1 to 3 Fig. 1, the protection device for the photoelectric displacement sensor for welded pipe cutting of the embodiment comprises a fixing seat 1 and a pressing sleeve 2, a protective sleeve 3 and an air pipe joint 4 arranged on the fixing seat 1.

[0032] The fixed seat 1 is fixed on the laser cutting head (as shown in Figure 4 or fixed on the mounting seat of the laser cutting head (as shown in Figure 5 As long as the fixed seat 1 moves synchronously with the laser cutting head.

[0033] Preferably, the fixed seat 1 is fixed on the laser cutting head by screws.

[0034] The fixed seat 1 is provided with a cavity penetrating the upper and lower surfaces of the plate structure; the side surface and the upper and lower surfaces of the plate structure of the fixed seat 1 are provided with screw holes for being fixed on the laser cutting head by screws.

[0035] The photoelectric displacement sensor 5 (with the measurement window downward) is fixed on the upper part of the fixed seat 1, specifically, the measurement window of the photoelectric displacement sensor 5 enters the cavity of the fixed seat 1 from the upper part of the fixed seat 1 and is fixed in the cavity, and the measurement window measures downward through the cavity.

[0036] Preferably, the photoelectric displacement sensor 5 (with the measurement window downward) is fixed on the upper part of the fixed seat 1 by the pressing sleeve 2. The pressing sleeve 2 is provided with an annular structure, the inside of the pressing sleeve 2 surrounds the bottom shaft of the photoelectric displacement sensor 5, and the outside of the pressing sleeve 2 is fixed on the upper part of the fixed seat 1.

[0037] More preferably, the pressing sleeve 2 and the fixed seat 1 are threadedly connected in the embodiment; the material of the pressing sleeve 1 is steel.

[0038] The protective sleeve 3 is connected and fixed on the lower part of the fixed seat 2, specifically, the protective sleeve 3 is connected and fixed on the lower part of the fixed seat 2 and below the cavity, so as to close and protect the measurement window of the photoelectric displacement sensor 5, and ensure that the external water, oil and other impurities cannot pollute the sensor.

[0039] Preferably, the protective sleeve 3 is threadedly connected and fixed on the lower part of the fixed seat 2 and below the cavity.

[0040] Preferably, the material of the protective sleeve 3 is stainless steel or aluminum alloy.

[0041] Preferably, the protective sleeve 3 is provided with a hollow conical structure, the bottom surface of the hollow conical structure is fixed on the lower part of the fixed seat 1, the top end of the hollow conical protective sleeve 3 is provided with a hole, and the inside of the hollow conical structure is provided with a conical cavity, which is beneficial to form a positive pressure in the internal space when blowing inward.

[0042] The size of the hole at the top end of the protective sleeve 3 is determined according to the measurement angle requirement of the photoelectric displacement sensor 5, and the diameter of the hole is 10-20 mm.

[0043] The taper of the protective sleeve 3 is as small as possible, and the size of the taper is determined by the technical requirements of the photoelectric displacement sensor 5 selected, so as to ensure that the photoelectric displacement sensor 5 can normally measure.

[0044] The gas pipe joint 4 is connected to the fixed seat 1, the gas pipe is connected through the gas pipe joint 4, the inside cavity of the fixed seat 1 is blown by gas, the positive pressure is formed in the hollow tapered structure of the protective sleeve 3, the water, oil and the like outside cannot enter the inner cavity to contaminate the measurement window of the photoelectric displacement sensor 5, and the normal use of the photoelectric displacement sensor 5 is ensured.

[0045] The protective device for the photoelectric displacement sensor for the welded pipe cutting in the embodiment not only adds a protective structure to the photoelectric displacement sensor 5, but also adds the blowing function; in addition, the protective device for the photoelectric displacement sensor for the welded pipe cutting in the embodiment can not only fix the position of the photoelectric displacement sensor 5, but also can ensure that the impurities such as water, oil and the like cannot contact the measurement window of the photoelectric displacement sensor 5, and the stable measurement of the photoelectric displacement sensor 5 in the production and use process is ensured.

[0046] The above only describes the preferred example embodiments of the utility model, and does not constitute the limitation to the protection scope of the utility model. Any modification, equivalent replacement and improvement and the like made within the spirit and principle of the utility model should be included in the claim protection scope of the utility model.

Claims

1. A photoelectric displacement sensor guard for use in cutting a welded pipe, characterized by, The photoelectric displacement sensor protection device for welded pipe cutting comprises a fixing base, a protective sleeve and an air pipe joint; the fixing base is fixed on the laser cutting head, is in a plate block structure and is provided with a cavity penetrating through the upper and lower surfaces in the center, and the measurement window of the photoelectric displacement sensor is fixed downward in the cavity of the fixing base; the protective sleeve is fixed on the lower part of the fixing base below the cavity and seals and protects the measurement window of the photoelectric displacement sensor; the air pipe joint is connected to the fixing base to blow air into the cavity, so that external water and oil cannot enter and contaminate the measurement window.

2. A photoelectric displacement sensor guard for pipe weld cutting as defined in claim 1, wherein The protective sleeve is in a hollow conical structure, the bottom surface of the hollow conical structure is fixed on the lower part of the fixing base, the top end of the hollow conical structure is provided with a hole, and the inside of the hollow conical structure is provided with a conical cavity.

3. A photoelectric displacement sensor guard for pipe welding and cutting apparatus as claimed in claim 1 or 2, wherein, The protective sleeve is fixed on the lower part of the fixing base below the cavity through screw connection.

4. A photoelectric displacement sensor guard for pipe welding and cutting apparatus as defined in claim 1 or 2 wherein, The material of the protective sleeve is stainless steel or aluminum alloy.

5. A photoelectric displacement sensor guard for pipe welding and cutting apparatus as defined in claim 1 or 2 wherein, The measurement window of the photoelectric displacement sensor is fixed downward on the upper part of the fixing base through a pressing sleeve.

6. A photoelectric displacement sensor guard for pipe weld cutting as defined in claim 5 wherein, The pressing sleeve is in a ring structure, surrounds the bottom shaft of the photoelectric displacement sensor on the inside, and is fixed on the upper part of the fixing base on the outside.

7. A photoelectric displacement sensor guard for pipe weld cutting as defined in claim 5 wherein, The pressing sleeve is screw-connected with the fixing base.

8. A photoelectric displacement sensor guard for pipe weld cutting as defined in claim 5 wherein, The material of the pressing sleeve is steel.

9. A photoelectric displacement sensor guard for pipe weld cutting as defined in claim 1 or 2 wherein, The fixing base is fixed and installed on the laser cutting head or the mounting base of the laser cutting head through screws.

10. A photoelectric displacement sensor guard for pipe welding and cutting apparatus as defined in claim 1 or 2 wherein, The side surface and the upper and lower surfaces of the plate block structure of the fixing base are provided with screw holes.

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