An explosion-proof limit switch for a fluid valve

Abstract

The present invention provides a limit switch for an explosion-proof fluid valve, which includes an upper limit switch cover and a lower limit switch cover. The upper limit switch cover and the lower limit switch cover are snap-connected to each other. A first inclined portion is provided at the bottom edge of the upper limit switch cover, and first engaging teeth are provided on the first inclined portion. A second inclined portion is provided at the top edge of the lower limit switch cover, and second engaging teeth that are engaged with the first engaging teeth are provided on the second inclined portion. The inclination angles of the first inclined portion and the second inclined portion are equal. The advantage of the present invention is that since the portions of the first engaging teeth and the second engaging teeth are inclined, when the inside of the limit switch is subjected to an explosion shock, the impact force will be more borne by the upper limit switch cover and the lower limit switch cover, making the explosion-proof effect of the limit switch better.

Description

Technical Field

[0001] The invention relates to the technical field of limit switches, and in particular to a limit switch for an explosion-proof fluid valve. Background Art

[0002] Valves are control components in fluid delivery systems, with functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. Valves used in fluid control systems come in a wide variety of varieties and specifications, from the simplest shutoff valves to the various valves used in extremely complex automatic control systems. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. Valves are also divided into cast iron valves, cast steel valves, chrome-molybdenum steel valves, chrome-molybdenum-vanadium steel valves, duplex steel valves, plastic valves, non-standard custom valves, etc. according to the material.

[0003] The existing limit switch for fluid valves has a poor internal explosion-proof effect when in use. When an accidental explosion occurs inside the fluid valve, the entire fluid valve will be damaged, resulting in a poor use effect. Summary of the invention

[0004] The present invention aims at solving the deficiencies of the prior art and provides a limit switch for an explosion-proof fluid valve.

[0005] The present invention solves the above technical problems through the following technical means:

[0006] A limit switch for an explosion-proof fluid valve comprises a limit switch upper cover and a limit switch lower cover, wherein the limit switch upper cover and the limit switch lower cover are mutually clamped;

[0007] A first inclined portion is provided at the bottom edge of the upper cover of the limit switch, and a first engaging tooth is provided on the first inclined portion;

[0008] A second inclined portion is provided at the top edge of the limit switch lower cover, and a second engaging tooth is provided on the second inclined portion to engage with the first engaging tooth, and the first inclined portion and the second inclined portion have the same inclination angle.

[0009] Preferably, the first engaging tooth and the second engaging tooth are both arc-shaped structures, and the cross-sections of the first engaging tooth and the second engaging tooth are isosceles terrace structures.

[0010] Preferably, it also includes a connecting pipe, which is opened inside the lower cover of the limit switch, and one end of the connecting pipe extends to the outside of the lower cover of the limit switch to block the connection between the upper cover of the limit switch and the lower cover of the limit switch.

[0011] Preferably, a circular clamping groove is provided on the inner wall of the upper cover of the limit switch, and a protruding circular ring connected to the circular clamping groove is provided on the outer wall of one end of the connecting pipe.

[0012] Preferably, a plurality of first connecting bumps are welded at equal angles on the side wall of the first inclined portion, and a plurality of second connecting bumps are welded at equal angles on the side wall of the second inclined portion. A sealing connection groove is formed in the first connecting bump, and a sealing convex ring for clamping the sealing connection groove is welded on the second connecting bump.

[0013] Preferably, the sealing convex ring is made of rubber material.

[0014] Preferably, the cross section of the sealing connection groove is a semi-circular arc structure, the cross section of the sealing convex ring is a semi-circular arc structure, and the cross-sectional area of the sealing convex ring is larger than the cross-sectional area of the sealing connection groove.

[0015] Preferably, both the first inclined portion and the second inclined portion incline downward.

[0016] Preferably, both the first inclined portion and the second inclined portion incline upward.

[0017] The advantages of the present invention are as follows: a first inclined portion is provided at the bottom edge of the upper cover of the limit switch, and a first clamping tooth is provided on the first inclined portion. A second inclined portion is provided at the top edge of the lower cover of the limit switch, and a second clamping tooth that is mutually clamped with the first clamping tooth is provided on the second inclined portion. Since the parts of the first clamping tooth and the second clamping tooth are inclined, when the limit switch is internally subjected to an explosion impact, the impact force will be more borne by the upper cover and the lower cover of the limit switch, making the explosion-proof effect of the limit switch better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of a limit switch for an explosion-proof fluid valve according to an embodiment of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the upper cover of the limit switch according to an embodiment of the present invention;

[0020] Figure 3 It is a schematic structural diagram of the connection between the upper cover and the lower cover of the limit switch according to an embodiment of the present invention;

[0021] Figure 4 It is a schematic structural diagram of the connection between the lower cover of the limit switch and the communicating pipe according to an embodiment of the present invention;

[0022] Figure 5 It is a schematic structural diagram of the connection between the first inclined portion and the second inclined portion according to an embodiment of the present invention.

[0023] Reference numerals in the figure: 10, upper cover of the limit switch; 11, first inclined portion; 111, first connecting bump; 1111, sealed connecting groove; 12, first engaging tooth; 13, circular engaging groove; 20, lower cover of the limit switch; 21, second inclined portion; 211, second connecting bump; 2111, sealing convex ring; 22, second engaging tooth; 30, connecting pipe; 31, protruding circular ring. Detailed implementation mode

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] Embodiment

[0026] As Figure 1 shown, a limit switch for an explosion-proof fluid valve in this embodiment includes an upper cover 10 of the limit switch and a lower cover 20 of the limit switch, and the upper cover 10 of the limit switch and the lower cover 20 of the limit switch are engaged with each other;

[0027] A first inclined portion 11 is provided at the bottom edge of the upper cover 10 of the limit switch, and a first engaging tooth 12 is provided on the first inclined portion 11;

[0028] A second inclined portion 21 is provided at the top edge of the lower cover 20 of the limit switch, and a second engaging tooth 22 that engages with the first engaging tooth 12 is provided on the second inclined portion 21. The inclination angles of the first inclined portion 11 and the second inclined portion 21 are equal.

[0029] A first inclined portion 11 is provided at the bottom edge of the upper cover 10 of the limit switch, and a first engaging tooth 12 is provided on the first inclined portion 11. A second inclined portion 21 is provided at the top edge of the lower cover 20 of the limit switch, and a second engaging tooth 22 that engages with the first engaging tooth 12 is provided on the second inclined portion 21. Since the portions of the first engaging tooth 12 and the second engaging tooth 22 are inclined, when the limit switch is subjected to an explosion shock inside, the impact force will be more borne by the upper cover 10 of the limit switch and the lower cover 20 of the limit switch, making the explosion-proof effect of the limit switch better.

[0030] As Figure 1-2 shown, both the first engaging tooth 12 and the second engaging tooth 22 are arc-shaped structures, and the cross-sections of the first engaging tooth 12 and the second engaging tooth 22 are isosceles trapezoid structures.

[0031] The number of the first engaging teeth 12 and the second engaging teeth 22 provided is both 5.

[0032] The first engaging teeth 12 on the first inclined portion 11 and the second engaging teeth 22 on the second inclined portion 21 are engaged with each other, so that the upper cover 10 of the limit switch and the lower cover 20 of the limit switch are connected into one body. The cross sections of the first engaging teeth 12 and the second engaging teeth 22 are isosceles trapezoid structures, which can make the engaging effect between the first engaging teeth 12 and the second engaging teeth 22 better.

[0033] As Figure 3-4 shown, an explosion-proof limit switch for a fluid valve further includes a connecting pipe 30. The connecting pipe 30 is arranged inside the lower cover 20 of the limit switch, and one end of the connecting pipe 30 extends to the outside of the lower cover 20 of the limit switch to block the connection part between the upper cover 10 of the limit switch and the lower cover 20 of the limit switch.

[0034] One end of the connecting pipe 30 extends to the outside of the lower cover 20 of the limit switch to block the connection part between the upper cover 10 of the limit switch and the lower cover 20 of the limit switch. When the inside of the limit switch is subjected to an explosion shock, the connecting pipe 30 can also share the impact pressure, so that the explosion-proof effect of the whole limit switch is further improved and the use effect is better.

[0035] As Figure 1-2 shown, a circular engaging groove 13 is formed on the inner wall of the upper cover 10 of the limit switch, and a protruding ring 31 connecting with the circular engaging groove 13 is arranged on the outer side wall of one end of the connecting pipe 30.

[0036] A protruding ring 31 connecting with the circular engaging groove 13 is arranged on the outer side wall of one end of the connecting pipe 30. On the one hand, it can make the position of the connecting pipe 30 more stable. On the other hand, it can make the inner wall of the connecting pipe 30 and the inner wall in the upper cover 10 of the limit switch be on the same vertical line, providing more space inside the limit switch for installing other components.

[0037] As Figure 5 shown, a plurality of first connecting convex blocks 111 are welded on the side wall of the first inclined portion 11 at equal angles, and a plurality of second connecting convex blocks 211 are welded on the side wall of the second inclined portion 21 at equal angles. A sealing connecting groove 1111 is formed in the first connecting convex block 111, and a sealing convex ring 2111 engaging with the sealing connecting groove 1111 is welded on the second connecting convex block 211.

[0038] The sealing convex ring 2111 is made of rubber material;

[0039] Bolt connecting holes for passing bolts are formed inside both the first connecting convex block 111 on the first inclined portion 11 and the second connecting convex block 211 on the second inclined portion 21.

[0040] It is connected through the sealing connection groove 1111 formed on the first connecting lug 111 and the sealing convex ring 211 arranged on the second connecting lug 211. On the one hand, it can make the connection position between the upper cover 10 of the limit switch and the lower cover 20 of the limit switch more stable. On the other hand, it can improve the sealing performance at the connection between the first connecting lug 111 and the second connecting lug 211, and the use effect is better.

[0041] As Figure 5 shown, the cross-section of the sealing connection groove 1111 is a semi-circular arc structure, the cross-section of the sealing convex ring 2111 is a semi-circular arc structure, and the cross-sectional area of the sealing convex ring 2111 is larger than the cross-sectional area of the sealing connection groove 1111.

[0042] The cross-sectional area of the sealing convex ring 2111 being larger than the cross-sectional area of the sealing connection groove 1111 can make the connection position between the sealing convex ring 2111 and the sealing connection groove 1111 more stable when the sealing convex ring 2111 is connected to the inside of the sealing connection groove 1111.

[0043] As Figure 1 shown, both the first inclined portion 11 and the second inclined portion 21 incline downward.

[0044] As Figure 2 shown, both the first inclined portion 11 and the second inclined portion 21 incline upward.

[0045] By both the first inclined portion 11 and the second inclined portion 21 inclining downward or both the first inclined portion 11 and the second inclined portion 21 inclining upward, it can be applicable to different types of fluid valves, with a wider application range and better use effect.

[0046] In this embodiment, during use, the upper cover 10 of the limit switch and the lower cover 20 of the limit switch are connected. The first engaging teeth 12 at the bottom of the upper cover 10 of the limit switch and the second engaging teeth 21 at the top of the lower cover 20 of the limit switch are engaged with each other, and the first inclined portion 11 at the bottom of the upper cover 10 of the limit switch and the second inclined portion 21 at the bottom of the lower cover 20 of the limit switch are mutually attached. A bolt is passed through the first connecting lug 111 on the first inclined portion 11 and the second connecting lug 21 on the second inclined portion 21. Through bolt connection, the upper cover 10 of the limit switch and the lower cover 20 of the limit switch can be connected and fixed. The connecting pipe 30 is arranged inside the lower cover 20 of the limit switch, and the inner wall of the connecting pipe 30 and the inner wall in the upper cover 10 of the limit switch are on the same vertical line, providing more space inside the limit switch for installing other components.

[0047] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An explosion-proof fluid valve limit switch, characterized in that: It includes a limit switch upper cover (10) and a limit switch lower cover (20), and the limit switch upper cover (10) and the limit switch lower cover (20) are snap-connected to each other; A first inclined portion (11) is provided at the bottom edge of the limit switch upper cover (10), and a first snap tooth (12) is provided on the first inclined portion (11); A second inclined portion (21) is provided at the top edge of the limit switch lower cover (20), and a second snap tooth (22) that is snap-connected to the first snap tooth (12) is provided on the second inclined portion (21), and the inclination angles of the first inclined portion (11) and the second inclined portion (21) are equal; Both the first snap tooth (12) and the second snap tooth (22) are arc-shaped structures, and the cross-sections of the first snap tooth (12) and the second snap tooth (22) are isosceles trapezoid structures; It further includes a connecting pipe (30), the connecting pipe (30) is opened inside the limit switch lower cover (20), and one end of the connecting pipe (30) extends to the outside of the limit switch lower cover (20) to block the connection between the limit switch upper cover (10) and the limit switch lower cover (20); A circular snap groove (13) is opened on the inner wall of the limit switch upper cover (10), and a protruding ring (31) that connects to the circular snap groove (13) is provided on the outer side wall of one end of the connecting pipe (30); A plurality of first connecting bumps (111) are welded at equal angles on the side wall of the first inclined portion (11), a plurality of second connecting bumps (211) are welded at equal angles on the side wall of the second inclined portion (21), a sealing connection groove (1111) is opened in the first connecting bump (111), and a sealing convex ring (2111) that is snap-connected to the sealing connection groove (1111) is welded on the second connecting bump (211).

2. The explosion-proof fluid valve limit switch according to claim 1, characterized in that: The sealing convex ring (2111) is made of rubber material.

3. The explosion-proof fluid valve limit switch according to claim 1, characterized in that: The cross-section of the sealing connection groove (1111) is a semi-circular arc structure, the cross-section of the sealing convex ring (2111) is a semi-circular arc structure, and the cross-sectional area of the sealing convex ring (2111) is larger than the cross-sectional area of the sealing connection groove (1111).

4. The explosion-proof fluid valve limit switch according to claim 1, characterized in that: Both the first inclined portion (11) and the second inclined portion (21) slope downwards.

5. The explosion-proof fluid valve limit switch according to claim 1, characterized in that: Both the first inclined portion (11) and the second inclined portion (21) slope upwards.

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