Cylindrical body proximity switch protection device in water vapor and greasy dirt environment

Abstract

The utility model provides a cylindrical proximity switch protection device in a water vapor and oil stain environment, and relates to the technical field of steel detection elements, the cylindrical proximity switch protection device comprises a pipe body and a colloid, a proximity switch and a joint part of the proximity switch and a signal line are sleeved through the pipe body, the pipe body is an outer sheath, and a gap is formed between the inner wall of the pipe body and the outer wall of the proximity switch. The liquid colloid is injected into the gap, the liquid colloid is cooled and solidified to form the inner sheath, and the outer sheath is sleeved with the inner sheath, so that the sleeve connection proximity switch and the joint part of the proximity switch and the signal line are doubly protected, the proximity switch can be prevented from being impacted by other objects, and water vapor and oil dirt can be effectively prevented from permeating into the proximity switch; the service life and the reliability of the proximity switch can be greatly improved, the equipment failure time is reduced, the labor capacity of maintenance personnel is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of steel detection elements, and in particular to a cylindrical proximity switch protection device in a water and gasoline polluted environment. Background Art

[0002] With the improvement of automation and intelligent equipment in my country's steel industry, automated detection components play a vital role in the entire system. The reliability of automated detection components is a key factor in whether the production line can produce continuously and automatically. Once a detection component is damaged or fails during the production process, it will lead to production accidents such as production line shutdown.

[0003] Among the detection elements of the steel plant automation system, the most used detection element is undoubtedly the proximity switch, which can detect the position status of the equipment. In the actual application of steel plants, many proximity switches often work in places with water, gas, and oil, such as the rack of a rolling mill. Due to the manufacturing process, the proximity switch works in a water, gas, and oil environment for a long time. The seals at the interface between the proximity switch and the signal line and the location where the proximity switch is installed with the indicator light are not reliable. The water, gas, and oil can gradually penetrate into the interior of the proximity switch, causing damage to the circuit and the proximity switch cannot work properly. Damage to the proximity switch will not only affect the normal operation of the production line, but it is also difficult to replace the proximity switch in many places, which brings difficulties and safety risks to maintenance personnel. Utility Model Content

[0004] The embodiment of the present application provides a cylindrical proximity switch protection device in a water-gasoline-contaminated environment, which solves the problem of poor reliability of the proximity switch in a water-gasoline-contaminated environment.

[0005] The embodiment of the present application provides a cylindrical proximity switch protection device in a water and gasoline polluted environment, comprising a tube body and a colloid;

[0006] The tube body is sleeved on the joint of the proximity switch and the signal line, the tube body is an outer sheath, and a gap is formed between the inner wall of the tube body and the outer walls of the proximity switch and the signal line;

[0007] The liquid colloid is injected into the gap, and the liquid colloid is cooled and solidified to form an inner sheath, the inner sheath wraps the joint between the proximity switch and the signal line, and the outer sheath wraps the inner sheath.

[0008] In a feasible implementation, the protective device further includes a plurality of elastic support sheets;

[0009] The plurality of elastic support sheets are fixedly mounted on the inner wall of the tube body, and the plurality of elastic support sheets are evenly distributed in a ring shape;

[0010] A plurality of the elastic support sheets distributed in an annular shape form a support ring, and a plurality of the support rings are arranged in the tube body;

[0011] The inner ends of the plurality of elastic support sheets are all in contact with the outer wall of the proximity switch, so that the proximity switch is fixed at the center of the tube body, ensuring that the wall thickness of the inner sheath is uniform.

[0012] In a feasible implementation, a guiding slope is provided at the first end of the elastic support sheet;

[0013] The proximity switch is inserted into the tube body through the second end of the tube body, and the outer wall of the proximity switch is slidably connected with the guiding inclined surface of the elastic supporting sheet.

[0014] In a feasible implementation, the outer end of the elastic support piece is fixedly connected to the inner wall of the tube body, and the inner end of the elastic support piece extends along a first direction, and the first direction forms a certain angle with the diameter of the tube body passing through the outer end of the elastic support piece.

[0015] In a feasible implementation, an end cover is provided on the outer wall of the second end of the tube body, a wiring hole is provided in the middle of the end cover, and the signal line passes through the wiring hole.

[0016] In a feasible implementation, an elastic rubber ring is provided on the inner wall of the wiring hole, and the inner wall of the elastic rubber ring is sleeved on the outer wall of the signal line to seal the second end of the tube body.

[0017] In a feasible implementation, the second end side wall of the tube body is provided with an injection port, and the injection port is communicated with the gap;

[0018] A sealing plug is inserted in the injection port.

[0019] In a feasible implementation, the tube body is a PVC tube, and the colloid is a resin glue.

[0020] An embodiment of the present application provides a protective device for a columnar proximity switch in a water-gasoline-polluted environment. The proximity switch and the joint portion of the proximity switch and the signal line are connected by a tube body. The tube body is an outer sheath. A gap is formed between the inner wall of the tube body and the outer wall of the proximity switch. Liquid colloid is injected into the gap. The liquid colloid is cooled and solidified to form an inner sheath. The outer sheath is connected to the inner sheath, thereby doubly protecting the connected proximity switch and the joint portion of the proximity switch and the signal line. The device can prevent the proximity switch from being hit by other objects, and can more effectively prevent water-gasoline-polluted pollution from penetrating into the interior of the proximity switch. It can greatly improve the service life and reliability of the proximity switch, reduce equipment failure time, reduce the workload of maintenance personnel, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a schematic diagram of the structure of the cylindrical proximity switch protection device in the water and gasoline pollution environment provided by the present application;

[0022] Figure 2 It is a front cross-sectional view of the pipe body and its connection structure;

[0023] Figure 3 It is a top view of the pipe body and its connection structure;

[0024] Figure 4 It is a structural diagram of the working status of the protective device.

[0025] Description of reference numerals:

[0026] 1-tube body; 2-colloid; 3-elastic support sheet; 4-end cover; 5-wiring hole; 6-elastic rubber ring; 7-injection port; 8-sealing plug. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0028] Among the detection elements of the steel plant automation system, the most commonly used detection element is undoubtedly the proximity switch. The proximity switch is a position switch that can be operated without direct mechanical contact with the moving parts. When an object approaches the sensing surface of the switch to the action distance, the switch can be activated without mechanical contact or any pressure, thereby driving DC appliances or providing control instructions to computer PLC devices.

[0029] In actual applications in steel mills, many proximity switches often work in places with water, gas, and oil, such as inside the rack of a rolling mill. Due to the manufacturing process, proximity switches work in water, gas, and oil environments for a long time. The seals at the interface between the proximity switch and the signal line and at the location where the proximity switch is installed with the indicator light are not reliable. Water, gas, and oil can gradually penetrate into the interior of the proximity switch, causing damage to the circuit and malfunction of the proximity switch. Damage to the proximity switch will not only affect the normal operation of the production line, but it is also difficult to replace the proximity switch in many places, bringing difficulties and safety risks to maintenance personnel. For this reason, it is extremely important to improve the reliability of the proximity switch in a water, gas, and oil environment. This application is aimed at this situation and invents a protective device for a proximity switch, which completely solves the problem of poor reliability of the proximity switch in a water, gas, and oil environment.

[0030] The specific structure of the columnar proximity switch protection device in a water-gasoline pollution environment provided by the present application is described in detail below in conjunction with the accompanying drawings.

[0031] Reference Figure 1-Figure 4 As shown in the figure, A is a proximity switch, B is a signal line, and the embodiment of the present application provides a cylindrical proximity switch protection device in a water-gasoline polluted environment, including a colloid 2 and a tube body 1 that are sequentially sleeved on the proximity switch and the joint of the proximity switch and the signal line;

[0032] The tube body 1 is a round tube body, and the tube body 1 is sleeved on the joint part of the proximity switch and the signal line, and part of the outer wall of the proximity switch. The tube body 1 is an outer sheath, and a gap is formed between the inner wall of the tube body 1 and the outer walls of the proximity switch and the signal line, and the gap has a certain width;

[0033] The liquid colloid 2 is injected into the gap, and the liquid colloid 2 is cooled and solidified to form an inner sheath, which wraps the joint between the proximity switch and the signal line, and the outer sheath wraps the inner sheath.

[0034] An embodiment of the present application provides a protective device for a columnar proximity switch in a water-gasoline-polluted environment, wherein a tube body 1 is sleeved on the proximity switch and the joint portion of the proximity switch and the signal line, wherein the tube body 1 is an outer sheath, and a gap is formed between the inner wall of the tube body 1 and the outer wall of the proximity switch, and a liquid colloid 2 is injected into the gap, and the liquid colloid 2 is cooled and solidified to form an inner sheath, and the outer sheath is sleeved on the inner sheath, thereby doubly protecting the sleeved proximity switch and the joint portion of the proximity switch and the signal line. The device can not only prevent the proximity switch from being hit by other objects, but also effectively prevent water-gasoline-polluted pollution from penetrating into the interior of the proximity switch, and can greatly improve the service life and reliability of the proximity switch, reduce equipment failure time, reduce the workload of maintenance personnel, and improve production efficiency.

[0035] Reference Figure 2 and Figure 3 As shown, in some embodiments, the protective device further includes a plurality of elastic support sheets 3. The elastic support sheets 3 may be rectangular rubber sheets;

[0036] Multiple elastic support sheets 3 are fixed to the inner wall of the tube body 1. The multiple elastic support sheets 3 are evenly distributed in a ring shape. The multiple elastic support sheets 3 distributed in a ring shape constitute a support ring. Multiple support rings are arranged in the tube body 1. The inner ends of the multiple elastic support sheets 3 are all in contact with the outer wall of the proximity switch, so that the proximity switch is fixed to the center of the tube body 1, ensuring that the wall thickness of the inner sheath is uniform.

[0037] like Figure 2 As shown, two groups of support rings are arranged in the tube body 1, and the two groups of support rings are arranged at the upper part and the lower part of the tube body 1 respectively. Multiple groups of support rings can be arranged in the tube body 1, and the multiple groups of support rings should be evenly distributed; Figure 3As shown, the support ring is composed of 12 elastic support sheets 3, and the 12 elastic support sheets 3 are evenly distributed in a circular shape along the inner wall of the tube body 1. The outer ends of the multiple elastic support sheets 3 are fixedly connected to the inner wall of the tube body 1, and the inner ends of the multiple elastic support sheets 3 are all against the outer wall of the proximity switch, thereby ensuring that the outer wall of the proximity switch and the inner wall of the tube body 1 are at equal distances at all locations, making the gap an annular gap, and then ensuring that the thickness of the cooled colloid 2 is uniform at all locations, thereby ensuring the protective performance of the inner sheath.

[0038] Reference Figure 2 and Figure 3 As shown, in some embodiments, the upper end of the elastic support sheet 3 is provided with a guide slope, the inner end of the guide slope gradually tilts downward, and the guide slope of the support ring forms a cone;

[0039] When in use, the proximity switch is inserted into the tube body 1 from top to bottom, and the outer wall of the proximity switch is slidably connected to the guide inclined surface of the elastic support sheet 3 .

[0040] Reference Figure 3 As shown, in some embodiments, the outer end of the elastic support sheet 3 is fixedly connected to the inner wall of the tube body 1, and the inner end of the elastic support sheet 3 extends along a first direction, and the first direction forms a certain angle with the diameter of the tube body passing through the outer end of the elastic support sheet 3, that is, the extension direction of the inner end of the elastic support sheet 3 does not point to the central axis of the tube body 1, and there is a certain angle between it and the diameter of the tube body 1;

[0041] In the natural state, the inner diameter of the support ring is smaller than the outer diameter of the proximity switch. When in use, the proximity switch is inserted into the tube body 1 and the support ring from top to bottom. During the insertion process, the proximity switch rotates slightly counterclockwise, so that the inner end of the elastic support sheet 3 tilts outward, and the inner diameter of the support ring is increased to be equal to the outer diameter of the proximity switch, so that the inner end of the elastic support sheet 3 abuts against the proximity switch, thereby facilitating the insertion of the proximity switch into the support ring and ensuring that multiple elastic support sheets 3 are evenly distributed and abut against the proximity switch.

[0042] Reference Figure 2 and Figure 4 As shown, in some embodiments, the outer wall of the second end of the tube body 1 is provided with an end cap 4, and the end cap 4 can be a circular cover body, and the end cap 4 is sleeved on the lower outer wall of the tube body 1, or the lower outer wall of the tube body 1 is provided with an external thread, and the tube body 1 and the end cap 4 are screwed together;

[0043] A wiring hole 5 is provided in the middle of the end cover 4. The wiring hole 5 is a round hole, and the signal line passes through the wiring hole 5.

[0044] In some embodiments, an elastic rubber ring 6 is disposed on the inner wall of the wiring hole 5 , and the inner wall of the elastic rubber ring 6 is sleeved with the outer wall of the signal line to avoid a gap, so that the second end of the tube body 1 is sealed.

[0045] Reference Figure 1As shown, in some embodiments, the second end side wall of the tube body 1 is provided with an injection port 7, the injection port 7 is a prototype through hole, and the injection port 7 is connected to the gap;

[0046] A sealing plug 8 is provided in the injection port 7 , and the sealing plug 8 can be plugged or screwed to the inner wall of the injection port 7 .

[0047] In some embodiments, the tube body 1 is a PVC tube, and the colloid 2 is a resin glue.

[0048] According to the above technical features, the working principle of the cylindrical proximity switch protection device in the water-gasoline pollution environment provided by this application in the actual application scenario is:

[0049] There are many specifications of commonly used cylindrical proximity switches. Here, the diameter of the proximity switch is D, and the length of the proximity switch body is L. Select a PVC tube with an inner diameter of D+2mm and a length of L+10mm. The wall thickness of the PVC tube is 1-1.5mm (the thickness of the PVC tube can also be selected according to the actual situation on site) as the shield of the proximity switch. The cross-sections of both ends of the PVC tube should be smooth;

[0050] When in use, the end of the signal line is passed through the elastic rubber ring 6 in the end cover 4 from bottom to top, the inner wall of the elastic rubber ring 6 is tightly fitted to the outer wall of the signal line, the end of the signal line is passed through the tube body 1 from bottom to top, and connected to the proximity switch;

[0051] Insert the wiring terminal of the proximity switch into the tube body 1 from top to bottom, and slightly rotate the proximity switch counterclockwise so that the connection part between the proximity switch and the signal line is located inside the tube body 1, and the sensing end of the proximity switch is located outside the tube body 1, so as to avoid affecting the normal use of the proximity switch;

[0052] Adjust the position of the end cap 4 and connect the end cap 4 to the bottom end of the tube body 1 to seal the bottom end of the tube body 1 to prevent the liquid colloid from flowing out;

[0053] Use a glue gun or other tool to inject the liquid colloid 2 from the injection port 7 on the tube body 1 into the gap between the tube body 1 and the proximity switch and the signal line, and vibrate slightly to avoid bubbles until the lower surface of the colloid 2 reaches the top of the tube body 1;

[0054] After a period of time, the liquid colloid 2 cools and solidifies to form an inner sheath, the inner sheath wraps the joint between the proximity switch and the signal line, and the outer sheath wraps the inner sheath, thereby achieving double protection.

[0055] Since PVC pipes have good tensile and compressive strength, corrosion resistance and good water tightness, and resin glue has the characteristics of high strength, strong adhesion, wear resistance, corrosion resistance and good water tightness, the proximity switch protection device made of the above two materials can not only prevent the proximity switch from being hit by other objects, but also effectively prevent water and gasoline pollution from penetrating into the interior of the proximity switch, which can greatly improve the service life and reliability of the proximity switch, reduce equipment failure time, reduce the workload of maintenance personnel, and improve production efficiency.

[0056] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on the several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0057] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A cylindrical proximity switch protection device in a water and gasoline polluted environment, characterized in that: include; A tube body (1), the tube body (1) being sleeved on the proximity switch and the joint between the proximity switch and the signal line, the tube body (1) being an outer sheath, and a gap being formed between the inner wall of the tube body (1) and the outer walls of the proximity switch and the signal line; The colloid (2) is injected into the gap in a liquid state, and the liquid colloid (2) is cooled and solidified to form an inner sheath, the inner sheath wraps the connection part between the proximity switch and the signal line, and the outer sheath wraps the inner sheath.

2. The cylindrical proximity switch protection device in a water-gasoline polluted environment according to claim 1 is characterized in that: The protective device also includes a plurality of elastic supporting sheets (3); The plurality of elastic support sheets (3) are fixedly mounted on the inner wall of the tube body (1), and the plurality of elastic support sheets (3) are evenly distributed in a ring shape; A plurality of the elastic support sheets (3) distributed in a ring shape form a support ring, and a plurality of the support rings are arranged in the tube body (1); The inner ends of the plurality of elastic support sheets (3) are all in contact with the outer wall of the proximity switch, so that the proximity switch is fixed at the center of the tube body (1), ensuring that the wall thickness of the inner jacket is uniform.

3. The cylindrical proximity switch protection device in a water-gasoline polluted environment according to claim 2 is characterized in that: The first end of the elastic support sheet (3) is provided with a guiding inclined surface; The proximity switch is inserted into the tube body (1) via the second end of the tube body (1), and the outer wall of the proximity switch is slidably connected to the guide inclined surface of the elastic support sheet (3).

4. The cylindrical body proximity switch protection device in a water-gasoline pollution environment according to claim 3 is characterized in that: The outer end of the elastic support sheet (3) is fixedly connected to the inner wall of the tube body (1), and the inner end of the elastic support sheet (3) extends along a first direction, and the first direction forms a certain angle with the diameter of the tube body passing through the outer end of the elastic support sheet (3).

5. The cylindrical proximity switch protection device in a water-gasoline polluted environment according to claim 1, characterized in that: An end cover (4) is provided on the outer wall of the second end of the tube body (1), a wiring hole (5) is provided in the middle of the end cover (4), and a signal line passes through the wiring hole (5).

6. The cylindrical body proximity switch protection device in a water-gasoline pollution environment according to claim 5, characterized in that: An elastic rubber ring (6) is provided on the inner wall of the wiring hole (5), and the inner wall of the elastic rubber ring (6) is sleeved on the outer wall of the signal line to seal the second end of the tube body (1).

7. The cylindrical proximity switch protection device in a water-gasoline polluted environment according to claim 1, characterized in that: The second end side wall of the tube body (1) is provided with an injection port (7), and the injection port (7) is communicated with the gap; A sealing plug (8) is inserted into the injection port (7).

8. The cylindrical body proximity switch protection device in a water-gasoline polluted environment according to claim 1, characterized in that: The tube body (1) is a PVC tube, and the colloid (2) is a resin glue.

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